JP4405543B2 - File - Google Patents

Description

  The present invention relates to a file, and in particular, for example, a front cover portion and a back cover portion are continuously provided on both sides of a back cover portion such as a clear book or a card album, and a transparent pocket is fixed between the front cover portion and the back cover portion. File related to.

Conventionally, there is a transparent pocket file in which a pocket is formed by a transparent file.
To do this, a file with a pocket welded to the cover is created with the pocket open, and the center of a stack of several sheets is melted and welded to the back of the cover so that the pocket is bound. There is.
In the above file, the spread of the pages is worsened because of the structure of overlapping and welding as the pages at both ends, and as a method of solving this problem, by fusing each pocket one by one to the cover, However, there is a file with a structure that has a uniform spread.

Japanese Patent Application No. 5-32279 Japanese Utility Model Publication No.7-111434 Japanese Patent Application No. 5-205490

  Even if a conventional pocket file is a file that is fused to the cover of each pocket, when the number of pockets increases, the spread spreads from the flat to the center due to the thickness of the pocket and the thickness of the document. The curve gradually increases, resulting in poor spread.

  Therefore, a main object of the present invention is to provide a file that can easily spread a binding sheet flat when a binding body is opened.

A file according to a first aspect of the present invention includes a front cover portion, a back cover portion, a cover body having a back cover portion continuously provided between the front cover portion and the back cover portion, and a binding sheet. When the cover sheet is opened, the binding body and the end edge of the pocket sheet group, which is a binding body that is welded or fixed to the cover sheet body and connected to the cover sheet body, are bound together. a curved holding portion curving toward the side away from the inside of the back cover sheet serving pocket sheet extends, and back cover, the front cover side region and the back cover portion between the bent portion and the spine portion of the front cover portion by the back cover side region between the bent portion and the spine portion, and a curved auxiliary section solidify back in an appropriate shape, binding body is curved in a bow shape toward the direction away from the inside of the back cover portion The bay is connected to the curved holding part Holding portion, so as to enable curved continuously provided by the edges of the binding member in width shorter than the spine width of the spine portion at its outer, the front cover portion side bent portion in the vicinity and the back cover side of the bent portions are Oite connected to the inside of the curved auxiliary portion in the vicinity of a file.
The file according to claim 2 of the present invention is configured such that the curved holding portion includes a front cover body in which a binding sheet is connected between a front cover portion and a back cover portion, and the front cover body includes a front cover side and a back cover side. is formed a hinge part in, binding bodies, superimposed multiple stitching sheet, at the edge connected to the cover, is connected between the hinge portion and the back cover side of the hinge portion of the front cover side, before Symbol binding The body is formed so that when the cover body is opened, the edge of the pocket sheet group as a binding body connected to the cover body is curved toward the side away from the inside of the spine cover , The hinge portion of the front cover portion and the hinge portion of the front cover portion at an appropriate interval from the binding body in the width direction so that the edge of the binding body connected to the cover can be bent in a width shorter than the spine width of the spine portion. in the outside of the hinge portion of the back cover part It connected to the curved holding portion in the vicinity of the near and back of the bent portion of the front side of the bent portion is a file according to claim 1.
According to a third aspect of the present invention, in the file according to the third aspect, the curved holding portion includes a front cover side hinge portion continuous with the front cover portion, a back cover side hinge portion continuous with the back cover portion, and the front cover. An intermediate connecting portion interposed between the side hinge portion and the back cover side hinge portion, and the intermediate connecting portion is connected to the front cover by the weight of the binding body when the front cover body is opened. The file according to claim 2, wherein the file is formed to bend in a direction away from the inside of the spine .
According to a fourth aspect of the present invention, in the file according to the fourth aspect, the curved holding portion includes a front cover side hinge portion connected to the front cover portion, a back cover side hinge portion connected to the back cover portion, and the front cover side hinge. And an intermediate connecting portion interposed between the back cover side hinge portion and the intermediate connecting portion, together with the edge of the binding body that is connected to the cover by the weight of the binding body when the cover body is opened. Formed to curve away from the inside of the front cover, the front cover side area following the front cover side hinge part and the back cover side area following the back cover side hinge part are interleaved when no load is applied When opening the cover, the hinge part on the front cover side and the hinge part on the back cover side move toward the opposite side of the back cover and become narrower than the width of the spine cover. On the inner side of the bent part and the back cover side And location, the angle between the intermediate connecting portion and the front cover side region and the back cover side regions spread, in the vicinity of elasticity and the front cover side hinge portion of the material constituting the bending holding portion and a back cover-side hinge portion The file according to any one of claims 1 to 3, wherein the file is formed so as to lift the intervening connecting portion toward the direction away from the inside of the back cover, which is the direction in which the binding sheet extends , by the spring property.
In the file according to claim 5 of the present invention, the height between the bent portion of the bending assisting portion and the back cover portion is set between the hinge portion on the front cover side of the bending holding portion and the inner side surface of the bending assisting portion. When the cover is closed, the height of the hinge between the front cover and the back cover and the hinge between the back cover and the back cover Is located near the edge in the width direction of the spine cover, and when the cover is opened, the intervening connecting part between the hinge part on the front cover side and the hinge part on the back cover side is the spine cover part. It is formed so as to be curved toward the opposite side, and the width between the front cover side hinge part and the back cover side hinge part is formed to be shorter than the width of the back cover part. The file is described in 2 to 4.
The file according to claim 6 of the present invention is such that the intervening connecting portion of the curved holding portion is plastically deformed by hot press processing on the synthetic resin plate to reduce its thickness and to give flexibility. The file according to any one of Items 1 to 5.
File according to claim 7 of the present invention, binding bodies, superimposed multiple stitching sheets, is connected to the cover at the edge which is connected to the cover, the curved holding portion includes a edge that will be connected to the binding body The cover body includes a front cover part, a front cover part, a back cover part, and a back cover part between the front cover part and the back cover part. A bent portion formed at an appropriate interval from the back cover portion is formed on the cover portion, and the binding sheet is connected through the connecting body, and is bent between the bent portion and the back cover portion and by the spine portion. An auxiliary portion is configured, and the binding body is curved so that the edge of the binding body connected to the cover is bent away from the inside of the back cover, which is the direction in which the binding sheet extends, when the cover is opened. The curved holding portion is formed from the spine width of the spine portion of the cover body. A bent portion of the front cover portion and a bent portion of the back cover portion at an appropriate interval from the binding body in the width direction so that the edge connected to the front cover of the binding body can be curved in a short width. The file according to claim 1, connected in the vicinity of.
In the file according to claim 8 of the present invention, the connection body includes a front cover side connection portion connected to the front cover portion side, a back cover side connection portion connected to the back cover portion side, and the front cover side. An intervening connecting portion interposed between the connecting portion and the back cover side connecting portion, the intervening connecting portion being connected to an end edge to be connected to the cover of the binding body, and when the cover is opened, the front cover The front cover is formed so as to bend away from the inside of the back cover, which is the direction in which the binding sheet extends, together with the edge connected to the front cover of the binding body by the tension of the side connection portion and the back cover side connection portion. The file according to claim 7, wherein a hinge portion is formed between the side connection portion and the interposition connection portion and between the back cover side connection portion and the interposition connection portion.
In the file according to claim 9 of the present invention, the connecting body includes a front cover side connecting portion connected to the front cover portion side, a back cover side connecting portion connected to the back cover portion side, and the front cover side. An intervening connecting portion interposed between the connecting portion and the back cover side connecting portion, and the intervening connecting portion together with an edge of the binding body connected to the cover by the weight of the binding body when the cover body is opened. It is formed so as to bend in a direction away from the inside of the spine cover, between the front cover side connection part and the interposition connection part, and between the back cover side connection part and the interposition connection part, The front cover side connecting part that is formed with the back cover side hinge part and that follows the front cover side hinge part and the back cover side connecting part that follows the back cover side hinge part are substantially orthogonal to the intervening connecting part when no load is applied. , when you open the front cover, and a hinge portion of the hinge portion and the back cover side of the front cover side, the back It moves toward the opposite side of the paper and becomes narrower than the width of the back cover, and is located on the inner side of the bent part on the front cover side and the bent part on the back cover side. spread the angle between the side region, is the extending direction of the sheet stapling intervening connecting portion by the spring of the vicinity of the elasticity and the front cover side hinge portion and the back cover side hinge portion of the material constituting the curved holding portion The file according to claim 7 or 8, wherein the file is formed to be lifted in a direction away from the inside of the back cover .
According to a tenth aspect of the present invention, the height between the bent portion of the front cover portion and the bent portion of the back cover portion and the back cover portion is the same as that of the hinge portion on the front cover side of the connector. It is formed to be approximately the same or shorter than the height between the inner surface of the cover and between the hinge on the back cover and the inner surface of the back cover. When the cover is closed, the hinge on the cover The hinge part on the back cover side is located in the vicinity of the end part in the width direction of the back cover part, and when the cover body is opened, an intervening connecting part between the hinge part on the front cover side and the hinge part on the back cover side Is formed so as to bend toward the opposite side of the back cover portion, and the width between the hinge portion on the front cover side and the hinge portion on the back cover side is shorter than the width of the spine portion. The file according to any one of claims 7 to 9, which is formed in a file.
The file according to claim 11 of the present invention is such that the intervening connecting portion of the connecting body is plastically deformed by hot press processing on the synthetic resin plate to reduce its thickness and to give flexibility. The file according to any one of 7 to 10.
According to a twelfth aspect of the present invention, the binding sheet includes a pocket in which a thermoplastic resin sheet is combined, and each binding sheet is thermally welded at an edge connected to the cover to open the binding sheet. The file according to any one of claims 1 to 11, wherein an edge connected to the cover is bent inward when the cover is bent.
According to a thirteenth aspect of the present invention, the connection body is formed of a rigid plate made of a thermoplastic synthetic resin, and a through hole is formed in a region connected to the binding body so as to be curved. The file according to any one of claims 1 to 12.

According to the present invention, a large number of binding sheets and a cover body having a front cover portion, a back cover portion, and a spine cover portion connected between the front cover portion and the back cover portion can be superimposed. A pocket sheet that is a binding sheet when the cover is opened, and an edge of the pocket sheet group that is a binding body that is welded or fixed to the cover body and is connected to the cover body. a curved holding portion curving toward the side away from the inside of the back cover extending and spine, the front cover side region and the bent portion and the spine of the back cover portion between the bent portion and the spine portion of the front cover portion by the back cover side region between the parts, and a bending assist section solidify back in an appropriate shape, binding bodies, so as to extend curved in arcuate in the direction away from the inside of the back cover portion The curved holding part is connected to the curved holding part. In shorter width than the spine width to allow curved continuously provided by the edges of the binding element, at its outer, curved in the vicinity of the bent portion in the vicinity and the back cover side of the bent portion of the front cover portion because it is Oite connected to the inside of the auxiliary section, it may provide a likely file flat-out the binding sheets when open one's eyes a binding body.
According to the invention of claim 2, the curved holding part is constituted by a cover body in which the binding sheets are connected between the front cover part and the back cover part, and the cover body is a hinge on the front cover side and the back cover side. parts are formed, binding bodies, superimposed multiple stitching sheet, at the edge connected to the cover, is connected between the hinge portion and the back cover side of the hinge portion of the front cover side, the front Stories binding body When the cover body is opened, the edge of the pocket sheet group, which is a binding body connected to the cover body, is formed to bend toward the side away from the inside of the back cover, and the bending auxiliary portion is formed by the back cover. The hinge part of the front cover part and the back cover are provided at an appropriate interval from the binding body in the width direction so that the edge of the binding body connected to the cover can be bent in a width shorter than the back width of the part. outside the hinge portion of the parts, the front side of the bent Since part is connected to the curved holding portion in the vicinity of the near and back of the bent portion, it is possible to provide a easy file flat-out the binding sheets when open one's eyes a binding body.
According to a third aspect of the present invention, the curved holding portion includes a front cover side hinge portion continuous with the front cover portion, a back cover side hinge portion continuous with the back cover portion, and the front cover side hinge. and a intermediate coupling portion interposed between the parts and back cover-side hinge portion, the intermediate connecting portion, when you open the cover member, the back with the edge of the binding member to be connected to the cover by the weight of the binding body Since it is formed so as to bend away from the inside of the cover page, it provides a file that makes it easy to spread the binding sheet flat when the portion connected to the intervening connecting portion of the binding body expands to open the binding body can do.
According to the invention of claim 4, the curved holding portion includes a front cover side hinge portion connected to the front cover portion, a back cover side hinge portion connected to the back cover portion, and the cover cover side hinge portion. An intervening connecting portion interposed between the back cover side hinge portion, the intervening connecting portion being connected to the cover by the weight of the binding body when the cover body is opened together with the edge of the binding body. The front cover side area following the front cover side hinge part and the back cover side area following the back cover side hinge part are formed on the intervening connecting part when no load is applied. When opening the cover, the hinge part on the front cover side and the hinge part on the back cover side move toward the opposite side of the spine and become narrower than the width of the spine and bend on the front cover side. Located on the inner side of the bent part on the front and back cover sides, Spread the angle between the imaging unit and the front cover side region and the back cover side region, mediated by a spring of the vicinity of the elasticity and the front cover side hinge portion and the back cover side hinge portion of the material constituting the curved holding portion Since the connecting part is formed so as to be lifted toward the direction away from the inside of the spine, which is the direction in which the binding sheet extends, the curved holding part is bent toward the side opposite to the spine, and the binding body is curved. When the portion continuously provided to the holding portion is expanded to open the binding body, the binding sheet can be easily spread flat.
According to the invention of claim 5, the height between the bent portion and the back cover portion of the bending auxiliary portion is between the hinge portion on the cover cover side of the bending holding portion and the inner side surface of the bending auxiliary portion, and The height of the hinge between the back cover side and the inner surface of the curved auxiliary portion is substantially the same or shorter than the height of the cover cover. Located near the edge of the back cover in the width direction, when the cover is opened, the intervening connection between the front cover and the back cover is the opposite side of the back cover And the width between the hinge part on the front cover side and the hinge part on the back cover side is shorter than the width of the back cover part. The binding portion by curving the portion toward the opposite side of the spine portion and expanding the portion connected to the bending holding portion of the binding portion Easily spread the binding sheet flat when open one's eyes.
According to the sixth aspect of the present invention, the intervening connecting portion of the curved holding portion is formed by plastically deforming the synthetic resin plate body by hot press processing to reduce its thickness, thereby providing flexibility. The region of the part can be partially processed to make the region flexible and function easily.
According to the invention of claim 7, binding bodies, superimposed multiple stitching sheets, is connected to the cover at the edge which is connected to the cover, the curved holding portion includes a concatenated Ru edge and cover of the binding body The cover body has a front cover part, a back cover part, and a back cover part between the front cover part and the back cover part, and the front cover part and the back cover part. A bending portion formed at an appropriate interval from the spine cover portion, and the binding sheet is connected via the coupling body, and the bending auxiliary portion is formed between the bending portion and the spine cover portion and by the spine cover portion. The binding body is formed such that when the cover body is opened, the edge of the binding body connected to the cover sheet is curved toward the direction away from the inside of the back cover, which is the direction in which the binding sheet extends. The curved holding part has a width shorter than the spine width of the back cover part of the cover body. In the vicinity of the bent portion of the front cover portion and the bent portion of the back cover portion at an appropriate interval from the binding body in the width direction so that the edge connected to the front cover of the binding body can be bent. Since it is connected, when the curved holding portion is directed to the opposite side of the spine portion, the curved holding portion is bent and the portion connected to the curved holding portion of the binding body is expanded to open the binding body. The binding sheet can be easily spread flat.
According to the invention of claim 8, the connecting body includes a front cover side connecting portion connected to the front cover portion side, a back cover side connecting portion connected to the back cover portion side, and the front cover side connecting portion. And an intervening connecting portion interposed between the back cover side connecting portion, and the intervening connecting portion is connected to an edge connected to the front cover of the binding body, and when the cover body is opened, the front cover side connecting portion is connected. It is formed to be curved toward the direction away from the inside of the back cover, which is the direction in which the binding sheet extends, together with the edge connected to the front cover of the binding body by the tension between the front part and the back cover side connection part. Since the hinge part is formed between the intermediate part and the interposition connection part and between the back cover side connection part and the interposition connection part, the part connected to the interposition connection part of the binding body is expanded and the binding body It is possible to easily spread the binding sheet flat when opening.
According to the invention of claim 9, the connecting body includes a front cover side connecting portion connected to the front cover portion side, a back cover side connecting portion connected to the back cover portion side, and the front cover side connecting portion. And an interposer connecting portion interposed between the back cover side connecting portion, and when the cover body is opened, the interstitial connecting portion is coupled with the edge of the binding body that is connected to the front cover by the weight of the binding body. The front cover side hinge part and the back cover are formed so as to bend in a direction away from the inside of the cover, between the front cover side connection part and the intermediate connection part, and between the back cover side connection part and the intermediate connection part. The front cover side connecting part that is formed with the side hinge part and that follows the front cover side hinge part and the back cover side connecting part that follows the back cover side hinge part are substantially orthogonal to the intervening connecting part when no load is applied. when you open the can, and the hinge portion of the front cover side of the hinge portion and the back cover side, the side opposite to the back cover Between the intervening connecting portion, the front cover side region, and the back cover side region, and is located inside the folded portion on the front cover side and the folded portion on the back cover side. The angle is widened, and the intervening connecting part is separated from the inside of the back cover, which is the direction in which the binding sheet extends , due to the elasticity of the material constituting the curved holding part and the spring property in the vicinity of the front cover side hinge part and the back cover side hinge part. Since it is formed so as to be lifted in the direction , the intervening connecting portion is bent toward the side opposite to the spine cover portion, and the portion continuously provided to the intervening connecting portion of the binding body is expanded to When the pages are spread, the binding sheet can be easily spread flat.
According to the invention of claim 10, the height between the bent portion of the front cover portion and the bent portion of the back cover portion and the back cover portion is the hinge portion and the front cover portion on the front cover side of the connecting body. When the cover body is closed, the hinge part and the back cover on the front cover side are formed to be approximately the same or shorter than the height between the inner surface of the cover and the hinge part on the back cover side and the inner surface of the back cover part. The hinge part on the side is located in the vicinity of the end part in the width direction of the spine cover part, and when the cover body is opened, the interposition connecting part between the hinge part on the cover cover side and the hinge part on the back cover side is It is formed so as to curve toward the opposite side of the back cover part, and the width between the hinge part on the front cover side and the hinge part on the back cover side is shorter than the width of the back cover part. Therefore, the connecting body is bent toward the side opposite to the spine portion, and the portion connected to the bending holding portion of the binding body is connected. So reluctant, it can be easily flat-out the binding sheet when open one's eyes a binding body.
According to the invention of claim 11, the intervening connecting portion of the connecting body is formed by subjecting the synthetic resin plate body to plastic deformation by hot press processing and reducing its thickness to provide flexibility. This region can be partially processed so that the region can be made flexible and function easily.
According to the invention of claim 12, when the binding sheet is provided with a pocket combined with a thermoplastic resin sheet, each binding sheet is thermally welded at the edge connected to the cover, and the binding sheet is opened. The edge connected to the front cover is formed to bend inward, so that the continuous portion of the binding body connected to the bending holding portion is expanded to open the binding body. The binding sheet can be easily spread flat.
According to a thirteenth aspect of the present invention, the connecting body is formed of a rigid plate made of a thermoplastic synthetic resin, and has a through hole formed in a region connected to the binding body so as to be curved. Therefore, it is possible to easily spread the binding sheet flat when the binding body is opened by expanding the continuous portion of the binding body continuously provided to the connection body.

The above-described object, other objects, features, and advantages of the present invention will become more apparent from the following description of the best mode for carrying out the invention with reference to the drawings.
In this specification and claims, the file cover height, cover width, and back width use commonly used expressions, but as a precaution, in FIG. The height is H, the cover width is W, and the spine width is T.

FIG. 1 is a perspective view of a pocket file according to an embodiment of the present invention, and FIG. 2 is a perspective view of the pocket file shown in FIG. 1 in an opened state. FIG. 3 is an illustrative view of a longitudinal section of the pocket file shown in FIG. 1 in a closed state.
The file 10 includes a front cover portion 12 made of a synthetic resin sheet such as polypropylene, a back cover portion 14, and a back cover portion 16 connected between the front cover portion 12 and the back cover portion 14. The body and a plurality of pocket sheets 18 that are binding sheets are overlapped, and a pocket sheet group 30 that is a binding body connected at an end edge that is connected to the spine cover portion 16 is fixed, and a connecting edge of the pocket sheet group 30 that is a binding body And a pocket sheet group 30 as a binding body welded and connected to each other.

  The file 10 has a binding sheet on the inside edge of the back cover portion 16 continuously provided between the front cover portion 12 and the back cover portion 14 when the cover sheet is opened. And a curved holding portion that bends toward the side on which the pocket pocket sheet 18 extends, and depending on the front cover side region and the back cover side region of the back cover portion 16 between the front cover portion 12 and the back cover portion 14. A curve assisting part that hardens the back of the cover body in the shape is provided.

  The front cover part 12 and the back cover part 14 are arranged via a linear front continuous part 20 and a back continuous part 22 that are continuous from the upper end to the lower end in the height direction of the front cover part 12 and the back cover part 14. The back cover portion 16 is continuously provided so as to intersect at a substantially right angle.

The pocket sheet 18 is flexibly formed between a portion fixed to the spine portion 16 and a portion above the front folding portion 24 and the back folding portion 26.
The pocket sheet 18 includes a linear outer edge 32, a linear bottom edge 34, and an opening edge 36 formed at an upper edge opposite to the bottom edge 34, and the linear outer edge 34. An inner edge 38 opposite to 32 is connected to the inner surface of the spine portion 16.

  The pocket sheet 18 is provided with a pocket portion 40 for accommodating a binding object S such as a document, and the back cover portion from the portion above the front folding portion 24 and the back folding portion 26 inside the pocket portion 40. A mount 42 extending in a direction away from the portion fixed to 16 is inserted.

As shown in FIGS. 3 to 6, the front cover portion 12 and the back cover portion 14 are continuous from the upper end to the lower end in the vicinity of the front continuous portion 20 and the back continuous portion 22 with the back cover portion 16. A front fold portion 24 and a back fold portion 26 are formed, a region from the front fold portion 24 to the back cover portion 16 in the front cover portion 12 and a region from the back fold portion 26 to the back cover portion 16 in the back cover portion 14; A grip portion 28 is formed by the spine portion 16.
The grip portion 28 has a front cover side connecting portion 52 facing upward with the front bent portion 24 as a pivot by the front cover side region and the back cover side region of the back cover portion 16 between the front cover portion 12 and the back cover portion 14. And the back cover side connecting portion 54 swings upward with the back folded portion 26 as a pivot, and the front cover portion 12 and the back cover portion 14 become substantially horizontal and parallel to the horizontal spine portion 16. When it becomes, the bending auxiliary | assistant part which bends the connection body 50 which is a curve holding | maintenance part to an upward direction, ie, the direction away from the spine cover part 16, in an arch shape is comprised.

The front cover portion 12 and the back cover portion 14 are arranged in the vicinity of the front continuous portion 20 and the back continuous portion 22 from the upper end to the lower end in the height direction. A front fold portion 24 and a back fold portion 26 are formed in parallel with 22.
The front folding part 24 and the back folding part 26 are formed to have the same width in the width direction of the cover, that is, the length between the inner side surface of the spine part 16 (shown in FIG. 4).
The mount 42 is provided so as not to exist in the vicinity of the front bent portion 24 and the back bent portion 26.

  The grip portion 28 has an angular configuration so that a person can hold the spine cover portion 16 on the palm of his hand and grip the finger with his finger to open the pocket sheet 18.

  The front cover part 12 and the back cover part 14 are arranged at the center in the height direction at the free edge opposite to the spine cover part 16, that is, the left edge of the front cover part 12 and the right edge of the back cover part 14. The search recess 70 is formed.

  The outer edge of the search recess 70 and the outer edge 32 of the pocket sheet 18 are aligned. Therefore, in a state where the book 10 is held with one hand with the cover closed, in particular, with the grip portion 28 held, the other hand is attached to the search recess 70 and the front cover portion 12 or the back cover portion. 14 and the pocket sheet 18 can be flipped together.

  As shown in FIG. 20, the file 10 is slightly bent on the front cover portion 12 or the back cover portion 14 with a finger attached to the outermost outer edge 32 of the pocket sheet 18 in the search recess 70. The upper pocket sheet 18 can be wound up in turn from the upper pocket sheet 18 toward the lower pocket sheet 18 and lifted up.

  The front cover portion 12 and the back cover portion 14 protrude outward from the spread edge of the pocket sheet 18, that is, the outer edge 32, outside the region where the search recess 70 is formed. A pair of upper and lower protrusions 72 for covering the formed heading i are formed.

The pocket sheet group 30 as the binding body is formed so that the edge of the pocket sheet group 30 connected to the spine cover portion 16 is curved toward the side opposite to the spine cover portion 16 when the cover body is opened. ing.
The pocket sheet 18 serving as a binding sheet is provided with a pocket combined with a thermoplastic resin sheet, and each pocket sheet 18 is thermally welded at an edge connected to the cover, and when the pocket sheet 18 is opened, the back cover is formed. An edge connected to the portion 16 is formed to be curved inward.

The pocket sheet group 30 is connected by an end edge to be connected, and a connecting body 50 that connects the front cover portion 12 and the back cover portion 14.
The connecting body 50 is made of a rigid plate-like plate body made of a thermoplastic synthetic resin and has a substantially square shape in plan view. The curved holding portion is configured to bend toward the side on which the pocket sheet 18 serving as a binding sheet extends when the cover is opened.

The connecting body 50 is more suitable than the pocket sheet group 30 in the width direction so that the edge connected to the cover sheet of the pocket sheet group 30 can be bent in a width shorter than the back width of the spine portion 16 of the cover body. They are connected in the vicinity of the bent portion 24 of the front cover portion 12 and the bent portion 26 of the back cover portion 14 with a certain interval.
The connecting body 50 includes a front cover side connecting portion 52 connected to the front cover portion 12 side, a back cover side connecting portion 54 connected to the back cover portion 14, and the front cover side connecting portion 52 and the back cover side. An intervening connecting portion 56 interposed between the connecting portions 54. The intervening connecting portion 56 is connected to an edge connected to the cover of the pocket sheet group 30, and when the cover is opened, the cover cover side connection Due to the tension of the portion 52 and the back cover side connecting portion 54, it is formed so as to bend toward the opposite side of the back cover portion 16 together with the edge connected to the cover of the pocket sheet group 30.
The intervening connecting portion 56 is relatively flexible, and is formed so as to bend toward the side opposite to the spine cover portion 16 due to the weight of the pocket sheet 18 when the pocket sheet 18 is spread apart. .

The connecting body 50 is formed so as to be curved by forming a through hole 58 in a region connected to the binding body.
In the connecting body 50, a plurality of through holes 58 having a rectangular shape in plan view are formed at appropriate intervals to give elasticity as a whole. In this embodiment, three penetrating holes, an upper through hole 58a, a lower through hole 58b, and an intermediate through hole 58c are formed.
In this embodiment, the intervening connecting portion 56 has a pair of upper and lower bridging portions 56a and 56b at the upper end and the lower end spanned between the front cover side connecting portion 52 and the back cover side connecting portion 54, A bridging portion 56c is bridged between the upper through hole 58a and the intermediate through hole 58c, and a bridging portion 56d is bridged between the intermediate through hole 58c and the lower through hole 58b. 30 is formed as an adhesive region.
Further, a longitudinal bridge 56e is formed between the upper through-hole 58a, the lower through-hole 58b, the intermediate through-hole 58c, and the hinge 60 on the front cover side, and the upper through-hole 58a and the lower through-hole are formed. A longitudinal bridging portion 56f is formed between 58b and the intermediate through hole 58c and the hinge portion 62 on the back cover side.

The connecting body 50 includes a hinge portion 60 and a hinge portion that are continuous from the upper end to the lower end between the front cover side connecting portion 52 and the intervening connecting portion 56 and between the back cover side connecting portion 54 and the intervening connecting portion 56. 62 is formed in parallel.
The height between the front folding part 24 of the front cover part 12 and the back folding part 26 of the back cover part 14 and the spine cover part 16 is the hinge part 60 and the front cover part on the front cover side of the connector 50. 12 is formed to be substantially the same as or shorter than the height between the inner surface of 12 and the hinge portion 62 on the back cover side and the inner surface of the back cover portion 14, and when the cover is closed, the hinge portion 60 on the front cover side. The back cover side hinge portion 62 is formed so as to be positioned in the vicinity of the end portion in the width direction of the back cover portion 16.
When the front cover portion 12 is opened, the interposition connection portion 56 between the front cover side hinge portion 60 and the back cover side hinge portion 62 is curved toward the opposite side of the back cover portion 16. And the width between the front cover side hinge portion 60 and the back cover side hinge portion 62 is shorter than the width of the back cover portion 16.

When the front cover is opened, that is, a flat state in which the front cover side connecting portion 52 and the back cover side connecting portion 54 are juxtaposed in a horizontal plane, and the front cover portion 12 and the back cover portion 14 are juxtaposed in a horizontal plane In the state, the width (T2) between the front cover side hinge part 60 and the back cover side hinge part 62 is larger than the width (T1) between the front continuous part 20 and the back continuous part 22. The front cover side hinge part 60 is located inside the front folding part 24 and the back cover side hinge part 62 is located inside the back continuous part 22 so as to be narrow.
Further, when the front cover is closed, that is, when the front cover portion 12 and the back cover portion 14 are in parallel and the front cover side connecting portion 52 and the back cover side connecting portion 54 are parallel, The width (T1) between the front continuous portion 20 and the back continuous portion 22 and the width (T3) between the hinge portion 60 on the front cover side and the hinge portion 62 on the back cover side are substantially close. Since the front cover side hinge part 60 and the back cover side hinge part 62 are fixed to the inner side surfaces of the front continuous part 20 and the back continuous part 22, the front continuous part 20 and the back continuous part 22 (T3) is shorter than (T1) by the thickness.

Next, the manufacturing method of the file 10 shown in FIG.
First, a raw fabric (synthetic resin plate such as polypropylene) is prepared, subjected to Thomson processing, the cover material 80 serving as a cover is removed, and the front cover 12, the back cover 14, and the back cover 16 are combined. A cover material 80 having a predetermined size is formed (cover material forming step).

  Next, the back cover sheet Z is adhered to the surface of the back cover area which will later become the back cover portion 16 in the cover material 80 with an adhesive (back cover sheet attaching step).

For example, as shown in FIGS. 6 and 7, when a thermoplastic resin sheet material is used as the cover material 80, the front continuous portion 20 and the back continuous portion 22, the front bent portion 24 and the back bent portion 26 are formed. In order to achieve this, a V-shaped groove 20A, a V-shaped groove 22A, a V-shaped groove 24A, and a V-shaped groove 26A having a substantially V-shaped cross section parallel to each other are heat-press molded with a V-shaped heater (not shown), 80 is formed so as to be bendable (V-shaped groove forming step).
And as shown in FIG. 8, the groove wall of the said V-shaped groove 20A, V-shaped groove 22A, V-shaped groove 24A, V-shaped groove 26A is heated, and it respond | corresponds to the front continuous connection part 20 and the back continuous connection part 22. By bending the V-shaped groove 20A, the V-shaped groove 22A, the V-shaped groove 24A, and the V-shaped groove 26A, the melted groove walls are brought into contact with each other and solidified, whereby the front continuous portion 20 and the back continuous portion are provided. 22 is formed (continuous portion forming step).
Thus, the front cover portion 12 and the back cover portion 14, and the back cover portion 16 is provided between the front cover portion 12 and the back cover portion 14, and the front bent portion 24 and the V-shaped groove comprising the V-shaped groove 24 </ b> A are provided. A cover sheet having a grip portion 28 is formed.

  Next, a large number of the plurality of pocket sheets 18 are overlapped, and the end surfaces of the overlapping inner edge 38 are heated to melt and fix a region slightly inside the inner edge 38. In order to heat weld the inner edge 38 of the pocket sheet 18, the heat plate is pressed against the inner edge 38, the vicinity of the inner edge 38 is welded, and the end faces of the inner edge 38 are bonded together. Although the pocket sheet group 30 is formed, it may be bonded with a hot melt adhesive or welded with an ultrasonic horn.

  The pocket sheet group 30 includes a pocket combined with a thermoplastic resin sheet, and each pocket sheet 18 is thermally welded at an edge connected to the cover, and is connected to the cover when the pocket sheet 18 is opened. The end edge is curved inward.

Next, a method for fixing the pocket sheet group 30 to the spine portion 16 will be described with reference to FIGS.
First, a connecting body 50 having a substantially square shape in plan view, which is made of a thermoplastic synthetic resin plate such as polypropylene, is prepared.
The connecting body 50 includes a front cover side connecting portion 52 connected to the front cover portion 12 side, a back cover side connecting portion 54 connected to the back cover portion 14, and the front cover side connecting portion 52 and the back cover side. And an intervening connecting portion 56 interposed between the connecting portions 54.
The interposition connecting portion 56 is connected to the edge of the binding body cover, and when the cover is opened, the pocket sheet is a binding body due to the tension between the front cover side connecting portion 52 and the back cover side connecting portion 54. It is formed so as to bend toward the opposite side to the spine portion 16 together with the edge connected to the cover of the group 30.
The connecting body 50 is formed so as to be curved by forming a through hole 58 in a region connected to the pocket sheet group 30, but the pocket sheet group 30 includes the bridging portions 56 a and 56 b of the connecting body 50. Adhered to the inner surfaces of 56c and 56d, and adhered to the inner surfaces of the longitudinal bridging portions 56e and 56f with a slight gap between the hinge portion 60 on the front cover side and the hinge portion 62 on the back cover side. ing.
The pocket sheet group 30 is thermally welded to the upper surface of the intervening connecting portion 56.

Hinge portions 60 and 62 are formed between the front cover side connecting portion 52 and the intervening connecting portion 56 and between the back cover side connecting portion 54 and the intervening connecting portion 56.
The height between the front folding part 24 of the front cover part 12 and the back folding part 26 of the back cover part 14 and the spine cover part 16 is the hinge part 60 and the front cover part on the front cover side of the connector 50. 12 is formed to be substantially the same as or shorter than the height between the inner surface of 12 and the hinge portion 62 on the back cover side and the inner surface of the back cover portion 14, and when the cover is closed, the hinge portion 60 on the front cover side is formed. The back cover side hinge portion 62 is configured to be positioned in the vicinity of the end portion in the width direction of the spine cover portion 16.
When the front cover part 12 is opened, the interposition connection part 56 between the front cover side hinge part 60 and the back cover side hinge part 62 is formed to bend toward the opposite side to the spine cover part 16. In addition, the width between the front cover side hinge portion 60 and the back cover side hinge portion 62 is formed to be shorter than the width of the back cover portion 16.

Next, a method for bonding the pocket sheet group 30 to the cover material 80 will be described.
The connecting body 50 is more suitable than the pocket sheet group 30 in the width direction so that the edge connected to the cover sheet of the pocket sheet group 30 can be bent in a width shorter than the spine width of the back cover part 16 of the cover sheet. The connection is made in the vicinity of the front bent portion 24 of the front cover portion 12 and the back bent portion 26 of the back cover portion 14 with an interval.
The connecting body 50 welds the front cover side connecting portion 52 connected to the front cover portion 12 side and the inner surface of the front cover portion 12, and the back cover side connecting portion 54 connected to the back cover portion 14. The inner surface of the back cover part 14 is welded, and is bridged between the front cover part 12 and the back cover part 14.

According to the embodiment, the connecting body 50 includes the front cover side connecting portion 52 connected to the front cover portion 12 side, the back cover side connecting portion 54 connected to the back cover portion 14, and the front cover. An intervening connecting portion 56 interposed between the side connecting portion 52 and the back cover side connecting portion 54. The intervening connecting portion 56 is connected at an edge connected to the cover of the binding body, and opens the cover body. Sometimes, it is curved toward the opposite side to the spine portion 16 together with the edge connected to the front cover of the binding body by the tension of the rigid front cover side connecting portion 52 and the rigid back cover side connecting portion 54. Is formed.
Hinge portions are formed between the front cover connecting portion 52 and the intervening connecting portion 56 and between the back cover connecting portion 54 and the intervening connecting portion 56.

The height (W1) between the front bent portion 24 of the front cover portion 12 and the back bent portion 26 of the back cover portion 14 and the back cover portion 16 is the same as that of the hinge portion 60 on the front cover side of the connector 50. The thickness of the back cover portion 16 is substantially the same as the height (W2) between the inner surface of the front cover portion 12 and between the hinge portion 62 on the back cover side and the inner surface of the back cover portion 14. Therefore, (W2) is shorter than (W1).
Thus, when the front cover is closed, the front cover side hinge portion 60 and the back cover side hinge portion 62 are positioned in the vicinity of the end portion of the spine cover portion 16 in the width direction, and the cover body is opened. The front cover side hinge portion 60 and the back cover side hinge portion 62 are formed so as to bend toward the opposite side of the back cover portion 16 and shorter than the width of the back cover portion 16. When the cover sheet is opened and the pocket sheet group 30 is opened, the pocket sheet 18 can be made flat.

The present invention is not limited to the above-described embodiment. For example, as shown in FIGS. 18 and 19, the connecting body 50 includes a front bent portion 24 of the front cover portion 12 and a back surface of the back cover portion 14. The height between the bent portion 26 and the spine portion 16 is between the hinge portion 60 on the front cover side of the coupling body 50 and the inner surface of the front cover portion 12 and on the back cover side hinge portion 62 and the back cover. You may form so that it may become short compared with the height between the inner surfaces of the part 14. FIG.
In this way, the area of the intervening connecting portion 56 may hang down toward the spine cover portion 16 due to the weight of the pocket sheet group 30, so that the gap between the intervening connecting portion 56 and the spine cover portion 16 is formed in the gap portion. A foam or the like may be filled so that the intervening connecting portion 56 and the spine portion 16 can be held substantially in parallel.

  Further, as shown in FIGS. 16 and 17, the front cover side connecting portion 52 and the back cover connecting portion 54 form a hinge portion in the vicinity of the front bent portion 24 and the back bent portion 26, and the pocket sheet 18 is attached to the front cover. The interposer connecting portion 56 is bent toward the side opposite to the back cover portion 16 by the weight of the pocket sheet 18 when opened to the portion 12 side and the back cover portion 14 side, and can be opened flat. May be.

21 is a perspective view of a pocket file according to an embodiment of the present invention, and FIG. 22 is a perspective view of the pocket file shown in FIG. 21 in an opened state. FIG. 23 is a vertical cross sectional view showing the pocket file shown in FIG. 21 in a closed state.
The file 110 has a front cover portion 112 made of a synthetic resin sheet such as polypropylene, a back cover portion 114, and a back cover portion 116 connected between the front cover portion 112 and the back cover portion 114. The body and a plurality of pocket sheets 118 as binding sheets are overlapped, and a pocket sheet group 130 as a binding body connected at an edge connected to the spine cover 116 is fixed, and a connecting edge of the pocket sheet group 130 as a binding body is fixed. And a pocket sheet group 130 as a binding body which are welded and connected to each other.

The file 110 includes a curved auxiliary portion that solidifies the spine of the cover body into an appropriate shape by the front cover side region and the back cover side region of the back cover portion 116 between the front cover portion 112 and the back cover portion 114, A pocket sheet 118, which is a binding sheet when the cover is opened, is attached to the edge of the pocket sheet group 130, which is a binding body, inside a spine cover 116 that is connected between the front cover portion 112 and the back cover portion 114. A bending holding portion that is bent toward the extending side is provided.
As shown in FIGS. 23 to 26, the front cover portion 112 and the back cover portion 114 have a front cover side region and a back cover side region of the back cover portion 116 between the front cover portion 112 and the back cover portion 114. A bending assisting part that solidifies the spine into an appropriate shape is formed. In this embodiment, the bending auxiliary portion is configured as an independent bending auxiliary member 128.

  The front cover part 112 and the back cover part 114 have a linear front and back folded part 124 and a back folded part 126 that are continuous from the upper end to the lower end in the height direction of the front cover part 112 and the back cover part 114. Via the continuous portion 120 and the back continuous portion 122, when the cover body is closed, it is continuously provided to the spine portion 116 so as to intersect at a substantially right angle.

The pocket sheet 118 has at least a portion (a front cover body of the front folded portion 124 and the back folded portion 126) from a portion fixed inside the back cover portion 116 between the front cover portion 112 and the back cover portion 114. (When closed).
The pocket sheet 118 includes a straight outer edge 132, a straight bottom edge 134, and an opening edge 136 formed at the upper end edge opposite to the bottom edge 134, and the straight outer edge 134. An inner edge 138 opposite to 132 is connected to the inner surface of the spine portion 116.

  The pocket sheet 118 is provided with a pocket portion 140 for accommodating a binding object S such as a document, and the pocket portion 140 has a portion above the front folding portion 124 and the back folding portion 126 (the cover body is closed). A mounting sheet 142 extending in a direction away from the portion fixed to the spine portion 116 is inserted.

The pocket sheet group 130 is connected by a curved holding portion 150 connected to the front cover portion 112 and the back cover portion 114 at the connecting edge to be connected.
The curved holding portion 150 is formed of a rigid plate made of a thermoplastic synthetic resin, and is a pocket as a binding body that is welded and connected at the connection edge of the pocket sheet group 130 as a binding body when the cover is opened. The edge of the sheet group 130 is configured to bend toward the side where the pocket sheet 118 serving as a binding sheet extends, that is, in a direction away from the spine portion 116.

The bend holding portion 150 has a width smaller than the spine width of the back cover portion 116 of the bending auxiliary member 128 so that the edge connected to the cover of the pocket sheet group 130 can be bent in the width direction. At an appropriate interval from 130, a connection is made between the vicinity of the outer side of the hinge part 160 on the front cover side and the vicinity of the outer side of the hinge part 162 on the back cover side.
The curved holding portion 150 includes a front cover side connecting portion 152 provided continuously on the front cover portion 112 side, a back cover side connecting portion 154 provided continuously with the back cover portion 114, and the front cover side connecting portion 152 and the back side. An intervening connecting portion 156 interposed between the cover side connecting portion 154 and the intervening connecting portion 156 is connected to an edge connected to the cover of the pocket sheet group 130, and the cover is opened when the cover is opened. Due to the tension of the front cover side connecting portion 152 and the back cover side connecting portion 154, it is formed so as to bend toward the opposite side to the back cover portion 116 together with the edge connected to the front cover of the pocket sheet group 130.
The curved holding portion 150 is relatively flexible, and is formed to be curved in an arch shape toward the side opposite to the spine portion 116 due to the weight of the pocket sheet 118 when the pocket sheet 118 is opened. Has been.

  The front cover portion 112 and the front cover side connecting portion 152 are formed in an integrated flat plate shape, and the back cover portion 114 and the back cover side connecting portion 154 are formed in an integrated flat plate shape.

The curved holding portion 150 is made of a thermoplastic synthetic resin plate such as polypropylene having a rectangular shape in plan view, and has a through hole 158 formed in a region connected to the pocket sheet group 130 as a binding body so as to be bent. Is formed.
The curved holding portion 150 is provided with a plurality of through holes 158 having a rectangular shape in plan view with appropriate intervals, and gives overall elasticity. In this embodiment, the through holes 158a of the upper, the through hole 158b of the lower, the intermediate through-hole 158c _1, through holes 158c _2, 6 pieces of the through-holes of the through hole 158c ₃ and the through hole 158c ₄ Is drilled.
In this embodiment, the intervening connecting portion 156 has a pair of upper and lower bridging portions 156a and 156b at the upper end and the lower end, spanning between the front cover side connecting portion 152 and the back cover side connecting portion 154, The bridge portion 156c ₁ , the bridge portion 156c ₂ , the bridge portion 156c _3, and the bridge portion 156c ₄ are bridged between the intermediate through hole 158c ₁ and the intermediate through hole 158c ₄ , and the intermediate through hole 158c ₄ and the lower A bridging portion 156c ₅ is bridged between the through hole 158b and an adhesion region with the pocket sheet group 130 is formed.
Further, a longitudinal bridge portion is formed between the upper through hole 158a, the lower through hole 158b, the intermediate through hole 158c ₁ , the through hole 158c ₂ , the through hole 158c ₃ and the through hole 158c ₄ and the hinge 160 on the front cover side. 156e is formed, and the upper through hole 158a, the lower through hole 158b, the intermediate through hole 158c ₁ , the through hole 158c ₂ , the through hole 158c ₃ and the through hole 158c ₄ and the hinge portion 162 on the back cover side Longitudinal cross-linking portion 156f is formed on the surface.
The longitudinal bridging portion 156e and the longitudinal bridging portion 156f are continuously formed from the upper end to the lower end of the cover body.

The curved holding part 150 includes a hinge part 160 and a hinge part 162 between the front cover side connection part 152 and the interposition connection part 156 and between the back cover side connection part 154 and the interposition connection part 156 from the upper end to the lower end. And are formed in parallel.
The height between the front bent portion 124 of the front cover portion 112 and the back bent portion 126 of the back cover portion 114 and the back cover portion 116 is determined by the hinge portion 160 on the front cover side of the curved holding portion 150 and the front cover. When the cover is closed, the hinge on the front cover side is formed to be substantially the same or shorter than the height between the inner surface of the part 112 and between the hinge part 162 on the back cover side and the inner surface of the back cover part 114. The part 160 and the back cover side hinge part 162 are formed so as to be positioned in the vicinity of the end part in the width direction of the back cover part 116.
When the front cover part 112 is opened, the interposition connection part 156 between the front cover side hinge part 160 and the back cover side hinge part 162 curves toward the opposite side of the back cover part 116, and A space between the front cover side hinge portion 160 and the back cover side hinge portion 162 is formed to be shorter than the width of the back cover portion 116.

As shown in FIGS. 23 to 26, the front cover portion 112 and the back cover portion 114 have a front cover side region and a back cover side region of the back cover portion 116 between the front cover portion 112 and the back cover portion 114. A bending assisting part that solidifies the spine into an appropriate shape is formed. In this embodiment, the bending auxiliary portion is configured as an independent bending auxiliary member 128.
The bending assisting member 128 is made of a thermoplastic synthetic resin plate such as polypropylene having a rectangular shape in plan view, and has a front bent portion 124 and a back bent portion 126 which are continuous from the upper end to the lower end, and is formed on the front cover portion 112 side. A bending auxiliary member 128 is formed by a region extending from the front bent portion 124 to the back cover portion 116, a region extending from the back bent portion 126 to the back cover portion 116 on the back cover portion 114 side, and the spine cover portion 116.
The bending assisting member 128 has a front cover side with the front bent portion 124 as a pivot by the front cover side region and the back cover side region of the spine portion 116 spanned between the front cover portion 112 and the back cover portion 114. The connecting portion 152 swings upward, and the back cover side connecting portion 154 swings upward with the back bent portion 126 as a pivot, so that the front cover portion 112 and the back cover portion 114 become substantially horizontal and assists in horizontal bending. When the member 128 is parallel to the spine portion 116 of the member 128, a bending assisting portion is formed that causes the bending holding portion 150 to bend in an arch shape upward, that is, in a direction away from the front cover portion 116.

The front cover portion 112 and the back cover portion 114 are arranged in the vicinity of the front continuous portion 120 and the back continuous portion 122 from the upper end to the lower end in the height direction. A front fold portion 124 and a back fold portion 126 are formed in parallel with 122.
The front folding part 124 and the back folding part 126 have the same width in the width direction of the cover body, that is, the length between the inner side surface of the spine part 116 (shown in FIG. 24).

A square-shaped mold retaining portion 121 connected to the back cover portion 116 via the front connecting portion 120 is formed on the front connecting portion 120 side, and the back connecting portion 122 side is connected to the back connecting portion 122 via the back connecting portion 122. Thus, a square-shaped mold retaining portion 123 is formed.
In addition, a square front cover side fixing portion 125 is provided on the front bent portion 124 side of the mold holding portion 121 and is continuously provided via the front bent portion 124, and the reverse bent portion 126 is provided on the back bent portion 126 side. Thus, a square-shaped back cover side adhering portion 127 that is continuously provided is formed.

  The bending assisting member 128 has an angular configuration so that a person can easily open the pocket sheet 118 by holding the spine cover 116 on the palm of the hand and holding it with the finger of the hand, and constitutes a gripping portion.

  The front cover part 112 and the back cover part 114 are arranged at the center in the height direction at the free edge opposite to the spine cover part 116, that is, the left edge of the front cover part 112 and the right edge of the back cover part 114. , A search recess 170 is formed.

  The outer edge of the search recess 170 and the outer edge 132 of the pocket sheet 118 are aligned. Therefore, with the front cover closed and the main file 110 held by one hand, in particular, while holding the bending auxiliary member 128, the other hand is attached to the search concave portion 170, and the front cover part 112 or the back cover is attached. The portion 114 and the pocket sheet 118 can be flipped together.

  As shown in FIG. 20, the file 110 is slightly bent on the front cover portion 112 or the back cover portion 114 with a finger attached to the outermost outer edge 132 of the pocket sheet 118 in the search recess 170. The upper pocket sheet 118 can be wound up in turn from the upper pocket sheet 118 toward the lower pocket sheet 118.

  The front cover portion 112 and the back cover portion 114 protrude outward from the spread edge of the pocket sheet 118, that is, the outer edge 132, outside the region where the search recess 170 is formed. A pair of upper and lower protrusions 172 for covering the formed heading i are formed.

The pocket sheet group 130 serving as the binding body is formed so that the edge of the pocket sheet group 130 connected to the spine portion 116 is curved toward the side opposite to the spine portion 116 when the cover is opened. ing.
The pocket sheet 118 as a binding sheet has a pocket combined with a thermoplastic resin sheet, and each pocket sheet 118 is thermally welded at an edge connected to the cover, and when the pocket sheet 118 is opened, the back cover is formed. An edge connected to the portion 116 is formed to bend inward.

When the front cover is opened, that is, in a flat state where the front cover side connecting portion 152 and the back cover side connecting portion 154 are juxtaposed in a horizontal plane, and the front cover portion 112 and the back cover portion 114 are juxtaposed in a horizontal plane In the state, the width (T2) between the hinge portion 160 on the front cover side and the hinge portion 162 on the back cover side is larger than the width (T1) between the front continuous portion 120 and the back continuous portion 122. The front cover side hinge part 160 is located inside the front folding part 124 and the back cover side hinge part 162 is located inside the back continuous part 122 so that it becomes narrower.
Further, when the front cover is closed, that is, when the front cover part 112 and the back cover part 114 are parallel, and the front cover side connection part 152 and the back cover side connection part 154 are parallel, The width (T1) between the front continuous portion 120 and the back continuous portion 122 and the width (T3) between the hinge portion 160 on the front cover side and the hinge portion 162 on the back cover side are substantially close. However, since the front cover side hinge portion 160 and the back cover side hinge portion 162 are fixed to the inner side surfaces of the front continuous portion 120 and the back continuous portion 122, the front continuous portion 120 and the back continuous portion 122. (T3) is shorter than (T1) by the thickness of.

  Next, a method for producing the file 110 shown in FIG. 21 according to the present invention will be described with reference to FIGS.

  First, a large number of the plurality of pocket sheets 118 are overlapped, and the end surfaces of the overlapped inner edge 138 are heated to melt and fix the area slightly inside the inner edge 138. In order to thermally weld the inner edge 138 of the pocket sheet 118, the heat plate is pressed against the inner edge 138, the vicinity of the inner edge 138 is welded, and the end faces of the inner edge 138 are bonded together. The pocket sheet group 130 is formed, but it may be adhered by a hot melt adhesive or welded by an ultrasonic horn.

  The pocket sheet group 130 includes a pocket combined with a thermoplastic resin sheet, and each pocket sheet 118 is thermally welded at the edge connected to the cover, and is connected to the cover when the pocket sheet 118 is opened. The end edge is curved inward.

Next, a method of fixing the pocket sheet group 130 to the curved cover holding portion 150 of the cover body will be described with reference to FIGS.
First, a raw fabric (a thermoplastic synthetic resin plate such as polypropylene) is prepared, subjected to Thomson processing, the cover material 180 serving as a cover is removed, and a front cover portion 112, a back cover portion 114, and a curved holding portion 150 A cover material 180 having a size combined with the above is formed (cover material forming step).
First, in order to form the curved holding part 150 from a cover material 180 made of a thermoplastic synthetic resin plate such as polypropylene, the front cover side connecting part 152 connected to the front cover part 112 side, and the back cover part 114 A back cover side connecting portion 154 to be connected and an intervening connecting portion 156 interposed between the front cover side connecting portion 152 and the back cover side connecting portion 154 are section-molded.
The intervening connecting portion 156 is connected to an edge connected to the cover of the binding body, and when the cover is opened, a pocket sheet which is a binding body due to tension by the front cover side connecting portion 152 and the back cover side connecting portion 154 It is formed so as to bend toward the opposite side of the spine portion 116 together with the edge connected to the cover of the group 130.
The curved holding portion 150 is made of a thermoplastic synthetic resin plate such as polypropylene having a rectangular shape in plan view, and is formed to have a through hole 158 formed in a region connected to the pocket sheet group 130 so as to be curved. However, the pocket sheet group 130 is adhered to the inner side surfaces of the bridging portion 156a, the bridging portion 156b, the bridging portion 156c ₁ , the bridging portion 156c ₂ , the bridging portion 156c ₃ , the bridging portion 156c ₄ and the bridging portion 156c ₅ of the curved holding portion 150. In addition, it is bonded to the inner side surfaces of the longitudinal bridge portions 156e and 156f with a slight space between the hinge portion 160 on the front cover side and the hinge portion 162 on the back cover side.
The pocket sheet group 130 is thermally welded to the upper surface of the intervening connecting portion 156.

The curved holding portion 150 is formed with hinge portions 160 and 162 between the front cover side connection portion 152 and the interposition connection portion 156 and between the back cover side connection portion 154 and the interposition connection portion 156.
The height between the front bent portion 124 of the front cover portion 112 and the back bent portion 126 of the back cover portion 114 and the back cover portion 116 is determined by the hinge portion 160 on the front cover side of the curved holding portion 150 and the front cover. When the cover is closed, the hinge part on the front cover side is formed to be substantially the same or shorter than the height between the inner surface of the part 112 and between the hinge part 162 on the back cover side and the inner surface of the back cover part 114. 160 and the hinge portion 162 on the back cover side are configured to be positioned in the vicinity of the end portion in the width direction of the spine portion 116.
When the front cover part 112 is opened, the interposition connection part 156 between the hinge part 160 on the front cover side and the hinge part 162 on the back cover side is formed to bend toward the opposite side to the back cover part 116. In addition, the width between the front cover side hinge portion 160 and the back cover side hinge portion 162 is formed to be shorter than the width of the back cover portion 116.

Next, a method for bonding the pocket sheet group 130 to the cover material 180 will be described.
The curved holding part 150 is more appropriately than the pocket sheet group 130 in the width direction so that the edge connected to the cover sheet of the pocket sheet group 130 can be curved in a width shorter than the spine width of the back cover part 116 of the cover sheet. The connection is made between the hinge part 160 on the front cover side of the front cover part 112 and the hinge part 162 on the back cover side of the back cover part 114 with a certain interval.
The curved holding portion 150 welds the front cover side connecting portion 152 connected to the front cover portion 112 side and the outer surface of the front cover portion 112, and the back cover side connecting portion 154 connected to the back cover portion 114. And the outer surface of the back cover portion 114 are welded and bridged between the front cover portion 112 and the back cover portion 114.

According to the embodiment, the curved holding unit 150 includes the front cover side connecting part 152 connected to the front cover part 112 side, the back cover side connecting part 154 connected to the back cover part 114, and the front cover. Including an intermediate connecting portion 156 interposed between the front cover side connecting portion 152 and the back cover side connecting portion 154, the intermediate connecting portion 156 is connected to an edge connected to the front cover of the binding body, and opens the front cover body. When bent, the front cover side connecting portion 152 that is a rigid body and the back cover side connecting portion 154 that is a rigid body are curved toward the opposite side to the back cover portion 116 together with the edge that is connected to the front cover of the binding body. Is formed.
A front cover side hinge portion 160 and a back cover side hinge portion 162 are formed between the front cover connecting portion 152 and the intervening connecting portion 156 and between the back cover connecting portion 154 and the intervening connecting portion 1 56.

Next, in order to mold the bending assisting member 128, a thermoplastic resin sheet is prepared, and subjected to Thomson processing, and the bending assisting member 128 having a square shape in plan view is punched out.
Then, the headline paper Z is pasted with an adhesive on the surface of the spine cover area that will later become the spine portion 116 (backline paper pasting step).

For example, as shown in FIGS. 26 and 27, when a thermoplastic resin sheet material is used as the bending auxiliary member 128, the front continuous portion 120 and the back continuous portion 122, the front folded portion 124 and the back folded portion 126 are provided. In order to form, a V-shaped groove 120A, a V-shaped groove 122A, a V-shaped groove 124A, and a V-shaped groove 126A having a substantially V-shaped cross section parallel to each other are heat-press molded with a V-shaped heater (not shown), The material 180 is formed to be bendable (V-shaped groove forming step).
Thus, the outer surface of the front cover portion 112 is fixed to the vicinity of the outer edge of the front connecting portion 120 outside the hinge portion 160 on the front cover side, and the outer surface of the back cover portion 114. A cover body having a bending assisting member 128 is formed by adhering the vicinity of the back continuous portion 122 outside the hinge portion 162 on the back cover side.

The height (W1) between the front bent portion 124 of the front cover portion 112 and the back bent portion 126 of the back cover portion 114 and the spine portion 116 is a hinge portion 160 on the front cover side of the curved holding portion 150. And the inner surface of the front cover portion 112 and the height (W2) between the hinge portion 162 on the back cover side and the inner surface of the back cover portion 114 are substantially the same. (W2) is shorter than (W1) by the thickness.
Thus, when the front cover is closed, the front cover-side hinge 160 and the back cover-side hinge 162 are positioned in the vicinity of the end in the width direction of the spine 116 and the cover is opened. The front cover side hinge portion 160 and the back cover side hinge portion 162 are formed so as to bend toward the opposite side of the back cover portion 116 and to be shorter than the width of the back cover portion 116. When the cover sheet is opened and the pocket sheet group 130 is opened, the pocket sheet 118 can be made flat.

35 is a perspective view of a pocket file according to an embodiment of the present invention, and FIG. 36 is a perspective view of the pocket file shown in FIG. 35 in an opened state. FIG. 37 is an illustrative view in vertical section of the pocket file shown in FIG. 35 in a closed state.
The file 310 includes a front cover portion 312 made of a synthetic resin sheet such as polypropylene, a back cover portion 314, and a back cover portion 316 provided between the front cover portion 312 and the back cover portion 314. A plurality of pocket sheets 318 serving as binding sheets, and a pocket sheet group 330 serving as a binding body connected at an end edge connected to the spine cover 316 is fixed, and a connecting edge of the pocket sheet group 330 serving as a binding body is fixed. And a pocket sheet group 330 as a binding body welded and connected to each other.

  The file 310 includes a curved auxiliary portion that solidifies the spine of the cover body into an appropriate shape according to the front cover side region and the back cover side region of the spine cover portion 316 between the front cover portion 312 and the back cover portion 314. A pocket sheet 318, which is a binding sheet when the cover is opened, is formed at the edge of the pocket sheet group 330, which is a binding body, inside the spine cover portion 316 that is connected between the front cover portion 312 and the back cover portion 314. A bending holding portion that is bent toward the extending side is provided.

  The front cover portion 312 and the back cover portion 314 have a linear front and back fold portions 324 and 326 that are continuous from the upper end to the lower end in the height direction of the front cover portion 312 and the back cover portion 314. Via the continuous portion 320 and the back continuous portion 322, when the cover body is closed, the back cover portion 316 is continuously provided so as to intersect at a substantially right angle.

The pocket sheet 318 has at least a portion above the front fold portion 324 and the back fold portion 326 (the front cover body is attached to the inside of the back cover portion 316 between the front cover portion 312 and the back cover portion 314. (When closed) is formed flexibly.
The pocket sheet 318 includes a straight outer edge 332, a straight bottom edge 334, and an opening edge 336 formed at the upper edge opposite to the bottom edge 334, and the straight outer edge The inner edge 338 opposite to the 332 is connected to the inner surface of the spine portion 316.

  The pocket sheet 318 is provided with a pocket portion 340 for accommodating a binding object S such as a document, and a portion above the front folding portion 324 and the back folding portion 326 (the cover body is closed) inside the pocket portion 340. A mount 342 extending in a direction away from the portion fixed to the spine portion 316 is inserted.

The pocket sheet group 330 is connected by a curved holding portion 350 connected to the front cover portion 312 and the back cover portion 314 at the connecting edge to be connected.
The curved holding portion 350 is formed of a rigid plate made of a thermoplastic synthetic resin, and is a pocket as a binding body that is welded and connected at the connection edge of the pocket sheet group 330 as a binding body when the cover is opened. The edge group of the sheet group 330 is configured to bend toward the side where the pocket sheet 318 as a binding sheet extends, that is, in a direction away from the spine cover 316.

The curved holding portion 350 is larger than the pocket sheet group 330 in the width direction so that the edge connected to the cover of the pocket sheet group 330 can be curved in a width shorter than the spine width of the back cover portion 316 of the cover body. The connection is made between the vicinity of the inside of the hinge part 360 on the front cover side and the vicinity of the inside of the hinge part 362 on the back cover side at an appropriate interval.
The curved holding part 350 includes a front cover side connecting part 352 provided continuously on the front cover part 312 side, a back cover side connecting part 354 provided continuously with the back cover part 314, and the front cover side connecting part 352 and the back side. An intervening connecting portion 356 interposed between the cover side connecting portion 354 and the intervening connecting portion 356 is connected to an edge connected to the cover of the pocket sheet group 330, and the cover is opened when the cover is opened. Due to the tension of the front cover side connecting portion 352 and the back cover side connecting portion 354, it is formed so as to bend toward the opposite side of the back cover portion 316 together with the edge connected to the front cover of the pocket sheet group 330.
The curved holding portion 350 is relatively flexible and is formed so as to bend in an arch shape toward the opposite side of the back cover portion 316 due to the weight of the pocket sheet 318 when the pocket sheet 318 is opened. Has been.

  The front cover portion 312 and the front cover side connecting portion 352 are formed in an integrated flat plate shape, and the back cover portion 314 and the back cover side connecting portion 354 are formed in an integrated flat plate shape.

The curved holding part 350 is made of a thermoplastic synthetic resin plate such as polypropylene having a square shape in plan view, and has a through hole 358 formed in a region connected to the pocket sheet group 330 as a binding body so as to be curved. Is formed.
The curved holding portion 350 is provided with a plurality of through holes 358 having a rectangular shape in plan view with an appropriate interval therebetween, thereby imparting overall elasticity. In this embodiment, six through-holes including an upper through-hole 358a, a lower through-hole 358b, an intermediate through-hole 358c ₁ , a through-hole 358c ₂ , a through-hole 358c ₃ and a through-hole 358c ₄ Is drilled.
In this embodiment, the intervening connecting portion 356 has a pair of upper and lower bridging portions 356a and 356b at the upper end and the lower end, spanning between the front cover side connecting portion 352 and the back cover side connecting portion 354, A bridge portion 356c ₁ , a bridge portion 356c ₂ and a bridge portion 356c ₃ are bridged between the intermediate through hole 358c ₁ and the intermediate through hole 358c ₃ , and the intermediate through hole 358c ₃ and the lower through hole 358b A bridging portion 356c ₄ is bridged between them to form an adhesive region with the pocket sheet group 330.
Further, a longitudinal bridge 356e is formed between the upper through-hole 358a, the lower through-hole 358b, the intermediate through-hole 358c ₁ , the through-hole 358c ₂ and the through-hole 358c ₃ and the hinge portion 360 on the front cover side, In addition, a longitudinal bridge 356f is formed between the upper through-hole 358a, the lower through-hole 358b, the intermediate through-hole 358c ₁ , the through-hole 358c ₂ and the through-hole 358c ₃ and the hinge portion 362 on the back cover side. .
The longitudinal bridging portion 356e and the longitudinal bridging portion 356f are continuously formed from the upper end to the lower end of the cover body.

The curved holding part 350 includes a hinge part 360 and a hinge part 362 between the front cover side connecting part 352 and the interposed connecting part 356 and between the back cover side connecting part 354 and the interposed connecting part 356 from the upper end to the lower end. And are formed in parallel.
The height between the front bent portion 324 of the front cover portion 312 and the back bent portion 326 of the back cover portion 314 and the back cover portion 316 is the hinge portion 360 on the front cover side of the curved holding portion 350 and the front cover. When the cover body is closed, the hinge is formed on the front cover side when the cover body is closed. The portion 360 and the hinge portion 362 on the back cover side are formed so as to be positioned in the vicinity of the end portion in the width direction of the back cover portion 316.
When the front cover portion 312 is opened, the interposition connecting portion 356 between the front cover side hinge portion 360 and the back cover side hinge portion 362 is curved toward the opposite side to the back cover portion 316. In addition, the width between the front cover side hinge portion 360 and the back cover side hinge portion 362 is formed to be shorter than the width of the back cover portion 316.

  Longitudinal bridging portion 356e and front cover side connecting portion 352, which are continuously provided with hinge portion 360 on the front cover side, are orthogonally held at substantially right angles when no load is applied. The longitudinal bridging portion 356f and the back cover side connecting portion 354 that are continuously provided with the hinge portion 362 interposed therebetween are orthogonally held at a substantially right angle when no load is applied. When the front cover side connecting portion 352 side or the back cover side connecting portion 354 side is opened corresponding to the opening of the front cover portion 312 or the back cover portion 314, the longitudinal cross-linking portion 356e and the front cover side connecting portion 352 And the angle between the longitudinal bridging portion 356f and the back cover side connecting portion 354 is widened. When the angle is enlarged to approximately 120 to 130 degrees, the material constituting the curved holding portion 350 Due to the elasticity, the curved holding portion 350 is lifted in the direction away from the back cover portion 316 by the spring property in the vicinity of both ends of the front cover side hinge portion 360 or the back cover side hinge portion 362 (see FIG. 47B).

As shown in FIGS. 36 to 40, the front cover portion 312 and the back cover portion 314 have a front cover side region and a back cover side region of the back cover portion 316 between the front cover portion 312 and the back cover portion 314. A bending assisting part that solidifies the spine into an appropriate shape is formed. In this embodiment, the bending auxiliary portion is configured as an independent bending auxiliary member 328.
The bending auxiliary member 328 is made of a thermoplastic synthetic resin plate such as polypropylene having a rectangular shape in plan view, and has a front bent portion 324 and a back bent portion 326 formed from the upper end to the lower end, and is formed on the front cover portion 312 side. A bending auxiliary member 328 is formed by a region extending from the front bent portion 324 to the back cover portion 316, a region extending from the back bent portion 326 to the back cover portion 316 on the back cover portion 314 side, and the spine cover portion 316.
The bending assisting member 328 has a front cover side with the front bent portion 324 as a pivot by the front cover side region and the back cover side region of the spine cover portion 316 spanned between the front cover portion 312 and the back cover portion 314. The connecting portion 352 swings upward, and the back cover side connecting portion 354 swings upward with the back bent portion 326 as a pivot, and the front cover portion 312 and the back cover portion 314 become substantially horizontal and assists in horizontal bending. When it becomes parallel to the spine portion 316 of the member 328, a bending assisting portion is formed that causes the bending holding portion 350 to bend in an arch shape upward, that is, in a direction away from the cover portion 316.

The front cover portion 312 and the back cover portion 314 are arranged in the vicinity of the front continuous portion 320 and the back continuous portion 322 from the upper end to the lower end in the height direction. A front fold portion 324 and a back fold portion 326 are formed in parallel to 322.
The front folded portion 324 and the back folded portion 326 are formed to have the same width in the width direction of the cover body, that is, the length between the inner surface of the back cover portion 316 (shown in FIG. 38).

A rectangular shaped shape retaining portion 321 is formed on the back cover portion 316 on the front continuous portion 320 side through the front continuous portion 320, and on the back continuous portion 322 side through the back continuous portion 322. Thus, a square-shaped mold holding portion 323 is formed.
In addition, a square front cover side fixing portion 325 is formed on the front folding portion 324 side of the mold holding portion 321 via the front folding portion 324, and the back folding portion 326 side is provided with the back folding portion 326. A square-shaped back cover side adhering portion 327 that is continuously provided is formed.

  The bending assisting member 328 has an angular structure so that a person can easily open the pocket sheet 318 by holding the spine cover 316 on the palm of the hand and gripping it with the finger of the hand, and constitutes a gripping portion.

  The front cover portion 312 and the back cover portion 314 are arranged at the center in the height direction at the free edge opposite to the spine cover portion 316, that is, the left edge of the front cover portion 312 and the right edge of the back cover portion 314. A search recess 370 is formed.

  The outer edge of the search recess 370 and the outer edge 332 of the pocket sheet 318 are aligned. Accordingly, with the book cover 310 held by one hand with the front cover closed, in particular, with the bending assisting member 328 held, the other hand is attached to the search recess 370 and the front cover part 312 or the back cover is attached. The part 314 and the pocket sheet 318 can be flipped together.

  As shown in FIG. 20, the file 310 is slightly bent on the front cover portion 312 or the back cover portion 314 with a finger attached to the outermost outer edge 332 of the pocket sheet 318 in the search recess 370. The upper pocket sheet 318 can be wound up in order from the lower pocket sheet 318 toward the lower pocket sheet 318.

  The front cover portion 312 and the back cover portion 314 protrude outward from the spread edge of the pocket sheet 318, that is, the outer end edge 332, outside the region where the recessed portion for search 370 is formed. A pair of upper and lower protrusions 372 for covering the formed heading i are formed.

The pocket sheet group 330 as the binding body is formed so that the edge of the pocket sheet group 330 connected to the spine cover part 316 is curved toward the opposite side to the spine cover part 316 when the cover sheet is opened. ing.
The pocket sheet 318 as a binding sheet has a pocket combined with a thermoplastic resin sheet, and each pocket sheet 318 is thermally welded at the edge connected to the cover, and the back cover is opened when the pocket sheet 318 is opened. An edge connected to the portion 316 is formed to bend inward.

When the front cover is opened, that is, a flat state in which the front cover side connecting part 352 and the back cover side connecting part 354 are juxtaposed in a horizontal plane, and the front cover part 312 and the back cover part 314 are juxtaposed in a horizontal plane In the state, the width (T2) between the hinge portion 360 on the front cover side and the hinge portion 362 on the back cover side is larger than the width (T1) between the front continuous portion 320 and the back continuous portion 322. The front cover side hinge portion 360 is formed so as to be narrower than the front bent portion 324, and the back cover side hinge portion 362 is positioned inside the back continuous portion 322 so as to be narrower.
Further, when the front cover is closed, that is, when the front cover portion 312 and the back cover portion 314 are parallel and the front cover side connecting portion 352 and the back cover side connecting portion 354 are parallel, The width (T1) between the front continuous portion 320 and the back continuous portion 322 and the width (T3) between the front cover side hinge portion 360 and the back cover side hinge portion 362 are substantially close to each other. However, since the front cover side hinge portion 360 and the back cover side hinge portion 362 are fixed to the inner side surfaces of the front continuous portion 320 and the back continuous portion 322, the front continuous portion 320 and the back continuous portion 322 are fixed. (T3) is shorter than (T1) by the thickness of.

  Next, a method for producing the file 310 shown in FIG. 35 according to the present invention will be described with reference to FIGS.

  First, a large number of the plurality of pocket sheets 318 are overlapped, and the end surfaces of the overlapped inner end edges 338 are heated to melt and fix a region slightly inside the inner end edges 338. To heat weld the inner edge 338 of the pocket sheet 318, the heat plate is pressed against the inner edge 338, the vicinity of the inner edge 338 is welded, and the end faces of the inner edge 338 are bonded together. Although the pocket sheet group 330 is formed, it may be bonded with a hot melt adhesive or welded with an ultrasonic horn.

  The pocket sheet group 330 includes a pocket combined with a thermoplastic resin sheet, and each pocket sheet 318 is thermally welded at an edge connected to the cover sheet, and is connected to the cover sheet when the pocket sheet 318 is opened. The end edge is curved inward.

Next, a method for fixing the pocket sheet group 330 to the curve holding portion 350 of the cover sheet will be described with reference to FIGS.
First, a raw fabric (a thermoplastic synthetic resin plate such as polypropylene) is prepared, subjected to Thomson processing, and a cover material 380 serving as a cover is removed, and a front cover portion 312, a back cover portion 314, and a curve holding portion 350 A cover material 380 having a size of the above is formed (cover material forming step).
First, in order to form the curved holding portion 350 from a cover material 380 made of a thermoplastic synthetic resin plate such as polypropylene, the front cover side connecting portion 352 connected to the front cover portion 312 side, and the back cover portion 314 A back cover side connecting portion 354 to be connected and an intervening connecting portion 356 interposed between the front cover side connecting portion 352 and the back cover side connecting portion 354 are partitioned.
The intervening connecting portion 356 is connected to the edge of the binding body cover, and when the cover is opened, the pocket sheet is a binding body due to the tension of the front cover side connecting portion 352 and the back cover side connecting portion 354. It is formed so as to bend toward the opposite side to the spine cover portion 316 together with the edge connected to the cover of the group 330.
The curved holding portion 350 is made of a thermoplastic synthetic resin plate such as polypropylene having a rectangular shape in plan view, and is formed to have a through hole 358 formed in a region connected to the pocket sheet group 330 so as to be curved. but pocket sheet group 330, the bridge portion 356a of the curved holding portion 350, the bridge portion 356b, the bridge portion 356c _1, the bridge portion 356c _2, is bonded to the inner surface of the bridge portion 356c ₃ and bridge portions 356c _4, and front cover The hinge portion 360 on the side and the hinge portion 362 on the back cover side are bonded to the inner side surfaces of the longitudinal bridge portions 356e and 356f with a slight gap.
The pocket sheet group 330 is thermally welded to the upper surface of the intervening connecting portion 356.

The curved holding portion 350 has hinge portions 360 and 362 formed between the front cover side connecting portion 352 and the intervening connecting portion 356 and between the back cover side connecting portion 354 and the intervening connecting portion 356.
The height between the front bent portion 324 of the front cover portion 312 and the back bent portion 326 of the back cover portion 314 and the back cover portion 316 is the hinge portion 360 on the front cover side of the curved holding portion 350 and the front cover. When the cover is closed, the hinge portion on the front cover side is formed to be substantially the same or shorter than the height between the inner surface of the portion 312 and between the hinge portion 362 on the back cover side and the inner surface of the back cover portion 314. 360 and the back cover side hinge portion 362 are configured to be positioned in the vicinity of the end portion of the back cover portion 316 in the width direction.

In this embodiment, the cover material 180 which is originally a flat plate is subjected to a bending process, and the longitudinal cross-linking portion 356e and the front cover side connecting portion 352 which are continuously provided with the hinge portion 360 on the front cover side interposed therebetween. When the load cannot be applied, the mold is maintained at a substantially right angle, and the longitudinal bridge portion 356f and the back cover side connecting portion 354 that are continuously provided across the hinge portion 362 on the back cover side cannot apply the load. Sometimes, it is molded so as to be held at a substantially right angle.
In the molding process, the front cover side connecting portion 352 is bent around the hinge portion 360 until it is substantially perpendicular to the intervening connecting portion 356, and the back cover side connecting portion 354 is interposed and connected around the hinge portion 362 on the back cover side. Bend until it is approximately perpendicular to portion 356.
When the front cover side connecting portion 352 side or the back cover side connecting portion 354 side is opened corresponding to the opening of the front cover portion 312 or the back cover portion 314, the longitudinal cross-linking portion 356e and the front cover side connecting portion 352 are opened. And the angle between the longitudinal bridging portion 356f and the back cover side connecting portion 354 is widened. When the angle increases to approximately 120 to 130 degrees, the curved holding portion 350 is configured. The curved holding portion 350 is shaped to be lifted away from the back cover portion 316 by the spring property in the vicinity of both ends of the hinge portion 360 on the front cover side or the hinge portion 362 on the back cover side due to the elasticity of the material.
Thus, when the front cover part 312 is opened, the interposition connection part 356 between the front cover side hinge part 360 and the back cover side hinge part 362 curves toward the opposite side of the back cover part 316. And formed so as to be shorter than the width of the spine portion 316.

Next, a method for bonding the pocket sheet group 330 to the cover material 380 will be described.
The curved holding portion 350 is more appropriately than the pocket sheet group 330 in the width direction so that the edge connected to the cover of the pocket sheet group 330 can be curved in a width shorter than the spine width of the back cover portion 316 of the cover. The front cover portion 312 is connected between the front cover side hinge portion 160 and the back cover portion 314 on the back cover side hinge portion 362 with a certain interval.
The curved holding part 350 welds the front cover side connecting part 352 connected to the front cover part 312 and the outer surface of the front cover part 312, and the back cover side connecting part 354 connected to the back cover part 314. And the outer surface of the back cover portion 314 are welded and bridged between the front cover portion 312 and the back cover portion 314.

According to the embodiment, the curved holding part 350 includes a front cover side connecting part 352 connected to the front cover part 312 side, a back cover side connecting part 354 connected to the back cover part 314, and the front cover part 314. An intermediate connecting portion 356 interposed between the front cover side connecting portion 352 and the back cover side connecting portion 354, the intermediate connecting portion 356 being connected at an edge connected to the front cover of the binding body to open the front cover body. When bent, the front cover side connecting portion 352 that is a rigid body and the back cover side connecting portion 354 that is a rigid body are curved toward the opposite side to the back cover portion 316 together with the edge that is connected to the cover of the binding body. Is formed.
A front cover side hinge portion 360 and a back cover side hinge portion 362 are formed between the front cover connecting portion 352 and the intervening connecting portion 356 and between the back cover connecting portion 354 and the intervening connecting portion 356.

Next, in order to mold the bending assisting member 328, a thermoplastic resin sheet is prepared, subjected to Thomson processing, and the bending assisting member 328 having a rectangular shape in plan view is punched out.
Then, the headline paper Z is pasted to the surface of the spine cover area 316 that will later become the spine part 316 with an adhesive (backline paper pasting step).

  For example, as shown in FIGS. 48 and 49, when a thermoplastic resin sheet material is used as the bending assisting member 328, the front continuous portion 320 and the back continuous portion 322, the front bent portion 324 and the back bent portion 326 are provided. In order to form, a V-shaped groove 320A, a V-shaped groove 322A, a V-shaped groove 324A, and a V-shaped groove 326A having a substantially V-shaped cross section parallel to each other are heat-press molded with a V-shaped heater (not shown), The material 380 is formed so as to be bendable (V-shaped groove forming step).

Next, the longitudinal bridging portion 356e and the front cover side connecting portion 352 that are continuously provided across the hinge portion 360 on the front cover side are held at substantially right angles orthogonal to each other, and the hinge portion 362 on the back cover side is sandwiched. In a state where the continuous longitudinal bridge portion 356f and the back cover side connecting portion 354 are held at substantially right angles orthogonal to each other, the shape holding portion 321 and the shape holding portion 323 of the bending assisting member 328 are orthogonal to the spine portion 316. In this manner, the front cover side fixing portion 325 and the front cover side connecting portion 352 are bonded, and the back cover side fixing portion 327 and the back cover side connecting portion 354 are bonded.
Thus, the outer surface of the front cover portion 312 is fixed to the vicinity of the outer edge of the front connection portion 320 outside the hinge portion 360 on the front cover side, and the outer surface of the back cover portion 314. A cover body including a bending assisting member 328 is formed by adhering the vicinity of the back continuous portion 322 outside the hinge portion 362 on the back cover side.

The height (W1) between the front bent portion 324 of the front cover portion 312 and the back bent portion 326 of the back cover portion 314 and the back cover portion 316 is a hinge portion 360 on the front cover side of the curved holding portion 350. And the inner surface of the back cover portion 312 and the height (W2) between the hinge portion 362 on the back cover side and the inner surface of the back cover portion 314, (W2) is shorter than (W1) by the thickness.
Thus, when the cover is closed, the front cover-side hinge 360 and the back cover-side hinge 362 are located near the end of the back cover 316 in the width direction, and the cover is opened. The front cover side hinge portion 360 and the back cover side hinge portion 362 are formed so as to bend toward the opposite side of the spine portion 316 and to be shorter than the width of the spine portion 316. When the cover sheet body is opened and the pocket sheet group 330 is opened, the pocket sheet 318 can be made flat.

  The present invention is not limited to the embodiment described above, and various modifications can be made based on the idea of the present invention.

The pocket file shown in FIG. 1 can be modified as shown in FIGS.
The file 410 has a binding sheet when the front cover is opened at the edge of the pocket sheet group 30 as a binding body inside the spine cover section 16 continuously provided between the front cover section 12 and the back cover section 14. And a curved holding portion that bends toward the side on which the pocket pocket sheet 18 extends, and depending on the front cover side region and the back cover side region of the back cover portion 16 between the front cover portion 12 and the back cover portion 14. A curve assisting part that hardens the back of the cover body in the shape is provided.
As shown in FIGS. 50 to 52, the front cover portion 12 and the back cover portion 14 are continuous from the upper end to the lower end in the vicinity of the front continuous portion 20 and the back continuous portion 22 with the back cover portion 16. A front fold portion 24 and a back fold portion 26 are formed, a region from the front fold portion 24 to the back cover portion 16 in the front cover portion 12 and a region from the back fold portion 26 to the back cover portion 16 in the back cover portion 14; A grip portion 28 is formed by the spine portion 16.
The grip portion 28 has a front cover side connecting portion 452 facing upward with the front bent portion 24 as a pivot by the front cover side region and the back cover side region of the back cover portion 16 between the front cover portion 12 and the back cover portion 14. The back cover side connecting portion 454 swings upward with the back folded portion 26 as a pivot, and the front cover portion 12 and the back cover portion 14 become substantially horizontal and parallel to the horizontal spine portion 16. When it becomes, the bending auxiliary | assistant part which bends the connection body 450 which is a curve holding | maintenance part to an upward direction, ie, the direction away from the spine cover part 16, in an arch shape is comprised.

The front cover portion 12 and the back cover portion 14 are arranged in the vicinity of the front continuous portion 20 and the back continuous portion 22 from the upper end to the lower end in the height direction. A front fold portion 24 and a back fold portion 26 are formed in parallel with 22.
The front folding part 24 and the back folding part 26 are formed to have the same width in the width direction of the cover, that is, the length between the inner side surface of the spine cover 16 (shown in FIG. 52).
The mount 42 is provided so as not to exist in the vicinity of the front bent portion 24 and the back bent portion 26.

The pocket sheet group 30 is connected by a connecting body 450 that connects the edge to be connected to the front cover portion 12 and the back cover portion 14.
The connecting body 450 is made of a rigid, substantially planar plate made of a thermoplastic synthetic resin, and is bonded and connected at the connecting edge of the pocket sheet group 30 as a binding body, and the pocket sheet group 30 as a binding body. The curved holding portion is configured to bend toward the side on which the pocket sheet 18 serving as a binding sheet extends when the cover is opened.

The connecting body 450 is more suitable than the pocket sheet group 30 in the width direction so that the edge connected to the cover sheet of the pocket sheet group 30 can be bent in a width shorter than the back width of the spine portion 16 of the cover body. They are connected in the vicinity of the bent portion 24 of the front cover portion 12 and the bent portion 26 of the back cover portion 14 with a certain interval.
The connecting body 450 includes a front cover side connecting portion 452 connected to the front cover portion 12 side, a back cover side connecting portion 454 connected to the back cover portion 14, and the front cover side connecting portion 452 and the back cover side. An intervening connecting portion 456 interposed between the connecting portions 454. The intervening connecting portion 456 is connected to an edge connected to the cover of the pocket sheet group 30 and is connected to the front cover side when the cover is opened. Due to the tension of the portion 452 and the back cover side connecting portion 454, it is formed so as to bend toward the opposite side of the back cover portion 16 together with the edge connected to the cover of the pocket sheet group 30.
The intervening connecting portion 456 is relatively flexible, and when the pocket sheet 18 is in a double-spread state, the pocket sheet 18 that is a binding sheet is stretched by the weight of the pocket sheet 18, that is, with the spine cover portion 16. Is formed to curve toward the opposite side.

The intervening connecting portion 456 of the connecting body 450 is formed to have a hinge groove 458 formed in a region connected to the binding body so as to be bent.
A plurality of intervening connection portions 456 of the connection body 450 are provided with a plurality of hinge grooves 458 at appropriate intervals on the spine cover portion 16 side, thereby providing overall elasticity. In this embodiment, three thin grooves, a front-side hinge groove 458a, a back-side hinge groove 458b, and a central hinge groove 458c, are formed.
In this way, the connecting body 450 has a hinge groove 458 for providing flexibility in parallel with an appropriate interval from the upper end to the lower end, and when the pocket seat 18 is opened, the back cover is formed. 1 is different from the embodiment shown in FIG. 1 in that it is formed so as to curve toward the opposite side to the portion 16.

The connecting body 450 includes a front cover side hinge portion 60 that is continuous from the upper end to the lower end between the front cover side connecting portion 452 and the intervening connecting portion 456 and between the back cover side connecting portion 454 and the intervening connecting portion 456. And the hinge part 62 on the back cover side are formed in parallel.
In the intervening connecting portion 456, a longitudinal bridging portion 456e is formed continuously from the upper end to the lower end of the intervening connecting portion 456 in the vicinity of the hinge portion 60 on the front cover side, and in the vicinity of the hinge portion 62 on the back cover side. A longitudinal cross-linking portion 456f is formed continuously from the upper end to the lower end of the intervening connecting portion 456.

The height between the front folding part 24 of the front cover part 12 and the back folding part 26 of the back cover part 14 and the spine cover part 16 is the hinge part 60 and the front cover part on the front cover side of the connector 450. 12 is formed to be substantially the same as or shorter than the height between the inner surface of 12 and the hinge portion 62 on the back cover side and the inner surface of the back cover portion 14, and when the cover is closed, the hinge portion 60 on the front cover side is formed. The back cover side hinge portion 62 is formed so as to be positioned in the vicinity of the end portion of the spine cover portion 16 in the width direction.
When the front cover part 12 is opened, the interposition connection part 456 between the front cover side hinge part 60 and the back cover side hinge part 62 is curved toward the side opposite to the back cover part 16. And the width between the front cover side hinge portion 60 and the back cover side hinge portion 62 is shorter than the width of the back cover portion 16.

The pocket file shown in FIG. 21 can be changed as shown in FIGS.
The file 510 includes a curve assisting unit that solidifies the spine of the cover body into an appropriate shape by the front cover side region and the back cover side region of the back cover unit 116 between the front cover unit 112 and the back cover unit 114, A pocket sheet 118, which is a binding sheet when the cover is opened, is attached to the edge of the pocket sheet group 130, which is a binding body, inside a spine cover 116 that is connected between the front cover portion 112 and the back cover portion 114. A bending holding portion that is bent toward the extending side is provided. In this modification, the bending auxiliary portion is configured as an independent bending auxiliary member 128, as in the pocket file shown in FIG.

The curved holding portion 550 is larger than the pocket sheet group 130 in the width direction so that the edge connected to the cover of the pocket sheet group 130 can be bent in a width shorter than the spine width of the back cover portion 116 of the cover body. The connection is made between the vicinity of the outer side of the hinge part 160 on the front cover side and the vicinity of the outer side of the hinge part 162 on the back cover side at an appropriate interval.
The curved holding portion 550 includes a front cover side connecting portion 552 connected to the front cover portion 112 side, a back cover side connecting portion 554 connected to the back cover portion 114, and the front cover side connecting portion 552 and the back surface. An intervening connecting portion 556 interposed between the front cover side connecting portion 554, the intervening connecting portion 556 being connected to an edge connected to the cover of the pocket sheet group 130, and when the cover is opened, Due to the tension of the front cover side connecting portion 552 and the back cover side connecting portion 554, it is formed so as to bend toward the opposite side of the back cover portion 116 together with the edge connected to the front cover of the pocket sheet group 130.
The curved holding portion 550 is relatively flexible. When the pocket sheet 118 is opened, the curved holding portion 550 is directed toward the side on which the pocket sheet 118 serving as the binding sheet extends due to the weight of the pocket sheet 118, that is, the back cover portion 116. It is formed to curve in an arch shape toward the opposite side.

The intervening connecting portion 556 of the curved holding portion 550 is made of a thermoplastic synthetic resin plate such as polypropylene having a square shape in plan view, and a hinge groove 558 is formed in a region connected to the pocket sheet group 130 as a binding body. It is formed to be curved.
A plurality of intervening connecting portions 556 of the curved holding portion 550 are provided with a plurality of hinge grooves 558 at an appropriate interval on the spine cover portion 116 side, and give overall elasticity. In this embodiment, three thin grooves, a front hinge groove 558a, a back hinge groove 558b, and an intermediate hinge groove 558c are formed.

  In this way, the curved holding portion 550 is provided with a hinge groove 558 for providing flexibility in parallel at an appropriate interval from the upper end to the lower end, and when the pocket seat 118 is opened, the back is opened. 21 is different from the embodiment shown in FIG. 21 in that it is formed to bend toward the opposite side to the cover portion 116.

The curved holding portion 550 includes a hinge portion 160 on the front cover side from the upper end to the lower end between the front cover side connection portion 552 and the interposition connection portion 556 and between the back cover side connection portion 554 and the interposition connection portion 556. And the back cover side hinge portion 162 are formed in parallel.
In the intervening connecting portion 556, a longitudinal bridge portion 556e is formed continuously from the upper end to the lower end of the intervening connecting portion 556 in the vicinity of the hinge portion 160 on the front cover side, and in the vicinity of the hinge portion 162 on the back cover side. A longitudinal cross-linking portion 556f is formed continuously from the upper end to the lower end of the intervening connection portion 556.

The height between the front bent portion 124 of the front cover portion 112 and the back bent portion 126 of the back cover portion 114 and the back cover portion 116 is the hinge portion 160 on the front cover side of the curved holding portion 550 and the front cover. When the cover is closed, the hinge on the front cover side is formed to be substantially the same or shorter than the height between the inner surface of the part 112 and between the hinge part 162 on the back cover side and the inner surface of the back cover part 114. The part 160 and the hinge part 162 on the back cover side are formed so as to be positioned near the end part in the width direction of the back cover part 116.
When the front cover part 112 is opened, the interposition connection part 556 between the front cover side hinge part 160 and the back cover side hinge part 162 is curved toward the side opposite to the back cover part 116. At the same time, the width between the front cover side hinge portion 160 and the back cover side hinge portion 162 is shorter than the width of the back cover portion 116.

The pocket file shown in FIG. 1 can be changed as shown in FIGS.
The file 610 is formed by binding the edge of the pocket sheet group 30 serving as a binding body inside the back cover portion 16 connected between the front cover portion 12 and the back cover portion 14 when the cover is opened. And a curved holding portion that bends toward the side on which the pocket sheet 18 extends, and depending on the front cover side region and the back cover side region of the back cover portion 16 between the front cover portion 12 and the back cover portion 14. A curve assisting part that hardens the back of the cover body in the shape is provided.

As shown in FIGS. 56 to 58, the front cover portion 12 and the back cover portion 14 are continuous from the upper end to the lower end in the vicinity of the front continuous portion 20 and the back continuous portion 22 with the back cover portion 16. A front fold portion 24 and a back fold portion 26 are formed, a region from the front fold portion 24 to the back cover portion 16 in the front cover portion 12 and a region from the back fold portion 26 to the back cover portion 16 in the back cover portion 14; A grip portion 28 is formed by the spine portion 16.
The grip portion 28 has a front cover side connecting portion 652 facing upward with the front bent portion 24 as a pivot by the front cover side region and the back cover side region of the back cover portion 16 between the front cover portion 12 and the back cover portion 14. And the back cover side connecting portion 654 swings upward with the back folded portion 26 as a pivot, and the front cover portion 12 and the back cover portion 14 are substantially horizontal and parallel to the horizontal spine portion 16. Then, the bending assisting portion is configured to bend the connecting body 650 as the bending holding portion in an arch shape toward the side where the pocket sheet 18 as the binding sheet extends, that is, in the direction away from the spine portion 16.

The front cover portion 12 and the back cover portion 14 are arranged in the vicinity of the front continuous portion 20 and the back continuous portion 22 from the upper end to the lower end in the height direction. A front fold portion 24 and a back fold portion 26 are formed in parallel with 22.
The front bent portion 24 and the back bent portion 26 are formed to have the same width in the width direction of the cover, that is, the length between the inner side surface of the spine portion 16 (shown in FIG. 57A).
The mount 42 is provided so as not to exist in the vicinity of the front bent portion 24 and the back bent portion 26.

The pocket sheet group 30 is connected by an end edge to be connected, and a connecting body 650 that connects the front cover portion 12 and the back cover portion 14.
The connecting body 650 is made of a rigid, substantially planar plate body made of a thermoplastic synthetic resin, and is bonded and connected at the connecting edge of the pocket sheet group 30 as a binding body, and the pocket sheet group 30 as a binding body. The curved holding portion is configured to bend toward the side where the pocket sheet 18 serving as a binding sheet extends when the cover is opened.

The connecting body 650 is more suitable than the pocket sheet group 30 in the width direction so that the edge connected to the cover sheet of the pocket sheet group 30 can be bent in a width shorter than the back width of the spine portion 16 of the cover body. They are connected in the vicinity of the bent portion 24 of the front cover portion 12 and the bent portion 26 of the back cover portion 14 with a certain interval.
The connecting body 650 includes a front cover side connecting portion 652 connected to the front cover portion 12 side, a back cover side connecting portion 654 connected to the back cover portion 14, and the front cover side connecting portion 652 and the back cover side. An intervening connecting portion 656 interposed between the connecting portions 654. The intervening connecting portion 656 is connected to an edge connected to the cover of the pocket sheet group 30, and when the cover is opened, the cover cover side connection Due to the tension of the part 652 and the back cover side connecting part 654, the edge part connected to the cover of the pocket sheet group 30 is formed to bend toward the opposite side of the back cover part 16.
The interposition connecting portion 656 of the connecting body 650 is made thinner than the front cover side connecting portion 652 and the back cover side connecting portion 654 to give flexibility, and the pocket sheet 18 is opened when the pocket sheet 18 is opened. The pocket sheet 18 that is a binding sheet is formed so as to be curved in an arch shape toward the side on which the pocket sheet 18 that is the binding sheet extends, that is, on the side opposite to the spine cover 16.
In this embodiment, plastic deformation by hot pressing is performed on the region constituting the coupling body 650 and the intervening coupling portion 656 of the thermoplastic synthetic resin plate body such as polypropylene having a uniform thickness as a whole. By reducing the thickness, flexibility is imparted.

The connection body 650 includes a hinge portion 60 and a hinge portion that are continuous from the upper end to the lower end between the front cover side connection portion 652 and the interposition connection portion 656 and between the back cover side connection portion 654 and the interposition connection portion 656. 62 is formed in parallel.
The intervening connecting portion 656 has a longitudinal bridge 656e formed continuously from the upper end to the lower end of the intervening connecting portion 656 in the vicinity of the hinge portion 60 on the front cover side, and in the vicinity of the hinge portion 62 on the back cover side. A longitudinal cross-linking portion 656f is formed continuously from the upper end to the lower end of the intervening connection portion 656.
In this embodiment, the longitudinal bridge portion 656e and the longitudinal bridge portion 656f have substantially the same thickness as the front cover side connection portion 652 and the back cover side connection portion 654, and the longitudinal bridge portion 656e and the longitudinal bridge portion 656f As described above, the thickness is reduced.

The height between the front bent portion 24 of the front cover portion 12 and the back bent portion 26 of the back cover portion 14 and the back cover portion 16 is determined by the hinge portion 60 and the front cover portion on the front cover side of the coupling body 650. 12 is formed to be substantially the same as or shorter than the height between the inner surface of 12 and the hinge portion 62 on the back cover side and the inner surface of the back cover portion 14, and when the cover is closed, the hinge portion 60 on the front cover side is formed. The back cover side hinge portion 62 is formed so as to be positioned in the vicinity of the end portion in the width direction of the back cover portion 16.
When the front cover portion 12 is opened, the interposition connection portion 656 between the front cover side hinge portion 60 and the back cover side hinge portion 62 is curved toward the opposite side of the back cover portion 16. In addition, the width between the front cover side hinge part 60 and the back cover side hinge part 62 is shorter than the width of the back cover part 16.

The pocket file shown in FIG. 21 can be changed as shown in FIGS.
The file 710 includes a curve assisting unit that solidifies the back of the cover body into an appropriate shape by the front cover side region and the back cover side region of the back cover unit 116 between the front cover unit 112 and the back cover unit 114, A pocket sheet 118, which is a binding sheet when the cover is opened, is attached to the edge of the pocket sheet group 130, which is a binding body, inside a spine cover 116 that is connected between the front cover portion 112 and the back cover portion 114. A bending holding portion that is bent toward the extending side is provided. In this modification, the bending auxiliary portion is configured as an independent bending auxiliary member 128, as in the pocket file shown in FIG.

The curved holding portion 750 is smaller than the pocket sheet group 130 in the width direction so that the edge connected to the cover sheet of the pocket sheet group 130 can be curved in a width shorter than the spine width of the back cover portion 116 of the cover body. Connected between the vicinity of the inside of the hinge part 160 on the front cover side and the vicinity of the inside of the hinge part 162 on the back cover side at an appropriate interval.
The curved holding portion 750 includes a front cover side connecting portion 752 connected to the front cover portion 112 side, a back cover side connecting portion 754 connected to the back cover portion 114, and the front cover side connecting portion 752 and the back cover. An intervening connecting portion 756 interposed between the side connecting portion 754 and the intervening connecting portion 756 is connected to an edge connected to the cover of the pocket sheet group 130, and when the cover is opened, the cover Due to the tension of the side connecting portion 752 and the back cover side connecting portion 754, it is formed so as to bend toward the opposite side to the back cover portion 116 together with the edge connected to the cover of the pocket sheet group 130.
The curved holding portion 750 is relatively flexible and is formed to bend toward the opposite side of the spine portion 116 due to the weight of the pocket sheet 118 when the pocket sheet 118 is opened.

The curved holding portion 750 is made of a thermoplastic synthetic resin plate such as polypropylene having a uniform planar thickness as a whole, and is flexible by reducing the thickness of the region connected to the pocket sheet group 130 as a binding body. It is formed so as to be curved by imparting properties.
In this embodiment, plastic deformation by hot pressing is applied to the region constituting the curved connecting portion 750 and the intervening connecting portion 756 of the thermoplastic synthetic resin plate such as polypropylene having a uniform thickness as a whole. The thickness is reduced to give flexibility.
Thus, when the pocket sheet 118 is opened, the curved holding part 750 is directed toward the side on which the pocket sheet 118 as the binding sheet extends due to the weight of the pocket sheet 118, that is, toward the side opposite to the back cover part 116. It is formed to curve in an arch shape.

The curved holding portion 750 includes a hinge portion 160 and a hinge portion 162 between the front cover side connecting portion 752 and the interposed connecting portion 756 and between the back cover side connecting portion 754 and the interposed connecting portion 756 from the upper end to the lower end. And are formed in parallel.
The intervening connecting portion 756 has a longitudinal bridging portion 756e formed continuously from the upper end to the lower end of the intervening connecting portion 756 in the vicinity of the hinge portion 160 on the front cover side, and in the vicinity of the hinge portion 162 on the back cover side. In addition, a longitudinal cross-linking portion 756 f is formed continuously from the upper end to the lower end of the intervening connection portion 756.
In this embodiment, the longitudinal bridge portion 756e and the longitudinal bridge portion 756f have substantially the same thickness as the front cover side connection portion 752 and the back cover side connection portion 754, and the longitudinal bridge portion 756e and the longitudinal bridge portion 756f As described above, the thickness is reduced.

The height between the front bent portion 124 of the front cover portion 112 and the back bent portion 126 of the back cover portion 114 and the back cover portion 116 is the hinge portion 160 on the front cover side of the curved holding portion 750 and the front cover. When the cover is closed, the hinge on the front cover side is formed to be substantially the same as or shorter than the height between the inner surface of the part 112 and between the hinge part 162 on the back cover side and the inner surface of the back cover part 114. The part 160 and the hinge part 162 on the back cover side are formed so as to be positioned in the vicinity of the end part in the width direction of the back cover part 116.
When the front cover portion 112 is opened, the interposition connecting portion 756 between the front cover side hinge portion 160 and the back cover side hinge portion 162 is curved toward the opposite side to the back cover portion 116. At the same time, the width between the front cover side hinge portion 160 and the back cover side hinge portion 162 is shorter than the width of the back cover portion 116.

  The pocket file shown in FIG. 1 can be changed as shown in FIGS.

  The file 810 has a binding sheet on the inner edge of the back cover portion 16 provided continuously between the front cover portion 12 and the back cover portion 14 when the edge of the pocket sheet group 30 as a binding body is opened. And a curved holding portion that bends toward the side on which the pocket pocket sheet 18 extends, and depending on the front cover side region and the back cover side region of the back cover portion 16 between the front cover portion 12 and the back cover portion 14. A curve assisting part that hardens the back of the cover body in the shape is provided.

As shown in FIGS. 62 to 64, the front cover portion 12 and the back cover portion 14 are continuous from the upper end to the lower end in the vicinity of the front continuous portion 20 and the back continuous portion 22 with the back cover portion 16. A front fold portion 24 and a back fold portion 26 are formed, a region from the front fold portion 24 to the back cover portion 16 in the front cover portion 12 and a region from the back fold portion 26 to the back cover portion 16 in the back cover portion 14; A grip portion 28 is formed by the spine portion 16.
The grip portion 28 has a front cover side connecting portion 852 facing upward with the front bent portion 24 as a pivot by the front cover side region and the back cover side region of the back cover portion 16 between the front cover portion 12 and the back cover portion 14. The back cover side connecting portion 854 swings upward with the back folded portion 26 as a pivot, and the front cover portion 12 and the back cover portion 14 become substantially horizontal and parallel to the horizontal spine portion 16. Then, the bending assisting portion is configured to bend the connecting body 850 that is the bending holding portion in an arch shape toward the side where the pocket sheet 18 that is the binding sheet extends, that is, in the direction away from the back cover portion 16.

The front cover portion 12 and the back cover portion 14 are arranged in the vicinity of the front continuous portion 20 and the back continuous portion 22 from the upper end to the lower end in the height direction. A front fold portion 24 and a back fold portion 26 are formed in parallel with 22.
The front folded portion 24 and the back folded portion 26 are formed to have the same width in the width direction of the cover, that is, the length between the inner side surface of the spine portion 16 (shown in FIG. 63).
The mount 42 is provided so as not to exist in the vicinity of the front bent portion 24 and the back bent portion 26.

The pocket sheet group 30 is connected by an end edge to be connected, and a connecting body 850 that connects the front cover portion 12 and the back cover portion 14.
The connecting body 850 is made of a rigid, substantially planar plate body made of a thermoplastic synthetic resin, and the pocket sheet group 30 is a binding body that is welded and connected at the connecting edge of the pocket sheet group 30 that is a binding body. The curved holding portion is configured to bend toward the side where the pocket sheet 18 serving as a binding sheet extends when the cover is opened.

The connecting body 850 is more suitable than the pocket sheet group 30 in the width direction so that the edge connected to the cover sheet of the pocket sheet group 30 can be bent in a width shorter than the spine width of the spine portion 16 of the cover body. They are connected in the vicinity of the bent portion 24 of the front cover portion 12 and the bent portion 26 of the back cover portion 14 with a certain interval.
The connecting body 850 includes a front cover side connecting portion 852 connected to the front cover portion 12 side, a back cover side connecting portion 854 connected to the back cover portion 14, and the front cover side connecting portion 852 and the back cover side. An intervening connecting portion 856 interposed between the connecting portions 854. The intervening connecting portion 856 is connected to an edge connected to the cover of the pocket sheet group 30 and is connected to the front cover side when the cover is opened. Due to the tension of the portion 852 and the back cover side connecting portion 854, the end portion connected to the cover of the pocket sheet group 30 is formed to bend toward the opposite side to the spine portion 16.
The interposition connecting portion 856 is relatively flexible, and when the pocket sheet 18 is spread apart, the pocket sheet 18 as a binding sheet is stretched by the weight of the pocket sheet 18, that is, with the spine cover portion 16. Is formed to curve in an arch shape toward the opposite side.

The connecting body 850 is formed to have a through-hole 858 in a region connected to the binding body and bend.
The connecting body 850 is provided with a plurality of through holes 858 having a rectangular shape in plan view with appropriate intervals, and gives overall elasticity. In this embodiment, five penetrating holes, an upper through hole 858a, a lower through hole 858b, and intermediate through holes 858c ₁ , 858c ₂ and 858c ₃ are formed.
In this embodiment, the intervening connecting portion 856 has a pair of upper and lower bridging portions 856a and 856b at the upper end and the lower end, spanning between the front cover side connecting portion 852 and the back cover side connecting portion 854, A bridging portion 856c ₁ is bridged between the upper through hole 858a and the intermediate through hole 858c _1, and a bridging portion 856c ₄ is bridged between the intermediate through hole 858c ₃ and the lower through hole 858b. A bonding region with the pocket sheet group 30 is formed. Further, a bridge portion 856c ₂ is bridged between the intermediate through hole 858c ₁ and the intermediate through hole 858c _2, and a bridge portion 856c ₃ is provided between the intermediate through hole 858c ₂ and the intermediate through hole 858c _3. An adhesive region with the pocket sheet group 30 is formed by being bridged.
Further, a longitudinal bridge portion 856e is formed between the upper through hole 858a, the lower through hole 858b, the intermediate through holes 858c ₁ , 858c ₂ and 858c ₃ and the hinge portion 60 on the front cover side, and the upper through hole A longitudinal bridge portion 856f is formed between the hole 858a, the lower through hole 858b, the intermediate through holes 858c ₁ , 858c ₂ and 858c ₃ and the hinge portion 62 on the back cover side.

The connecting body 850 includes a hinge portion 60 and a hinge portion that are continuous from the upper end to the lower end between the front cover side connecting portion 852 and the intervening connecting portion 856 and between the back cover side connecting portion 854 and the intervening connecting portion 856. 62 is formed in parallel.
The height between the front folding part 24 of the front cover part 12 and the back folding part 26 of the back cover part 14 and the spine cover part 16 is the hinge part 60 and the front cover part on the front cover side of the connecting body 850. 12 is formed to be substantially the same as or shorter than the height between the inner surface of 12 and the hinge portion 62 on the back cover side and the inner surface of the back cover portion 14, and when the cover is closed, the hinge portion 60 on the front cover side is formed. The back cover side hinge portion 62 is formed so as to be positioned in the vicinity of the end portion in the width direction of the back cover portion 16.
When the front cover portion 12 is opened, the interposition connection portion 856 between the front cover side hinge portion 60 and the back cover side hinge portion 62 is curved toward the side opposite to the back cover portion 16. In addition, the width between the front cover side hinge part 60 and the back cover side hinge part 62 is shorter than the width of the back cover part 16.

  The front cover side connecting portion 852 and the intervening connecting portion 856 that are continuously provided with the hinge portion 60 on the front cover side are orthogonally held at a substantially right angle when a load is not applied. The back cover side connecting portion 854 and the intervening connecting portion 856 that are continuously provided with the hinge portion 62 interposed therebetween are orthogonally held at a substantially right angle when no load is applied. When the front cover side connecting portion 852 side or the back cover side connecting portion 854 side is opened corresponding to the opening of the front cover portion 12 or the back cover portion 14, the intervening connecting portion 856 and the front cover side connecting portion 852 The angle between the intervening connecting portion 856 and the back cover side connecting portion 854 increases. When the angle increases to approximately 120 to 130 degrees, the material constituting the connecting portion 850 is increased. Due to the elasticity, the connecting portion 850 is lifted in the direction away from the back cover portion 16 by the spring property near both ends of the hinge portion 60 on the front cover side or the hinge portion 62 on the back cover side.

It is a perspective view solution figure of the pocket file which is one embodiment of this invention. It is a perspective view solution figure in the state where the pocket file shown in FIG. 1 was opened. It is a longitudinal cross-section solution figure in the closed state of the pocket file shown in FIG. FIG. 2 is a cross-sectional view of the pocket file shown in FIG. 1 in a closed state. FIG. 2 is a cross-sectional view of the pocket file shown in FIG. 1 in an open state. It is a perspective view solution figure which shows the manufacturing method of the file shown in FIG. It is a perspective view solution figure which shows the manufacturing method of the file shown in FIG. It is a perspective view solution figure which shows the manufacturing method of the file shown in FIG. It is a perspective view solution figure which shows the manufacturing method of the file shown in FIG. FIG. 2 is an illustrative sectional view showing a method for producing the file shown in FIG. 1 and shows a preparation state of a pocket sheet group. FIG. 2 is an illustrative sectional view showing a method of producing the file shown in FIG. FIG. 2 is a cross-sectional schematic view showing a method for producing the file shown in FIG. It is a transverse cross-section solution figure which shows the adhering method of a cover body and a connection body. It is a perspective view solution figure which shows the manufacturing method of the file shown in FIG. It is a cross-sectional solution figure which shows the effect | action of the file shown in FIG. It is an illustration figure of the modification of the file shown in FIG. 1, and a cross-section illustration figure which shows the state which closed the cover. It is an illustration figure of the modification of the file shown in FIG. 1, and a cross-section illustration figure which shows the state which opened the cover. It is an illustration figure of the modification of the file shown in FIG. 1, and a cross-section illustration figure which shows the state which closed the cover. It is an illustration figure of the modification of the file shown in FIG. 1, and a cross-section illustration figure which shows the state which opened the cover. It is a perspective view solution figure which shows the usage method of the file concerning this invention. It is a perspective view solution figure of the pocket file which is one embodiment of this invention. It is a perspective view solution figure in the state where the pocket file shown in FIG. 21 was opened. FIG. 22 is a longitudinal sectional view illustrating the pocket file shown in FIG. 21 in a closed state. FIG. 22 is an illustrative cross-sectional view of the pocket file shown in FIG. 21 in a closed state. FIG. 22 is a cross-sectional schematic view of the pocket file shown in FIG. 21 in an opened state. FIG. 22 is a cross-sectional schematic view of the pocket file shown in FIG. 21 in an opened state. It is a perspective view solution figure which shows the manufacturing method of the file shown in FIG. FIG. 22 is a schematic cross-sectional view showing a method for producing the file shown in FIG. FIG. 22 is a schematic cross-sectional view showing a method for producing the file shown in FIG. FIG. 22 is a schematic cross-sectional view showing a method for producing the file shown in FIG. FIG. 22 is a schematic cross-sectional view showing a method for producing the file shown in FIG. FIG. 22 is a schematic cross-sectional view showing a method for producing the file shown in FIG. It is a cross-sectional schematic solution figure which shows the adhering method of a cover sheet and a curve auxiliary member. FIG. 22 is a cross-sectional view showing the operation of the file shown in FIG. 21. It is a perspective view solution figure of the pocket file which is one embodiment of this invention. FIG. 36 is a perspective view illustrating the pocket file shown in FIG. 35 in an opened state. FIG. 36 is a longitudinal sectional view illustrating the pocket file shown in FIG. 35 in a closed state. FIG. 36 is a cross sectional view showing the pocket file shown in FIG. 35 in a closed state. FIG. 36 is a cross sectional view showing the pocket file shown in FIG. 35 in an opened state. FIG. 36 is a cross sectional view showing the pocket file shown in FIG. 35 in an opened state. FIG. 35 is a perspective view showing a manufacturing method of the file shown in FIG. 35. FIG. 36 is a cross-sectional view showing a method for producing the file shown in FIG. FIG. 36 is a cross-sectional view showing a method for producing the file shown in FIG. FIG. 36 is a cross-sectional view showing a method for producing the file shown in FIG. FIG. 36 is a cross-sectional view showing a method for producing the file shown in FIG. FIG. 36 is a cross-sectional view showing a method for producing the file shown in FIG. It is a cross-sectional schematic solution figure which shows formation of a curved holding part. It is a cross-sectional schematic solution figure which shows the effect | action of a curved holding part. It is a cross-sectional schematic solution figure which shows the adhering method of a cover sheet and a curve auxiliary member. FIG. 36 is a cross sectional view showing the operation of the file shown in FIG. 35. It is the perspective view solution figure of the pocket file which is a modification of the pocket file shown in FIG. FIG. 50 is a cross-sectional view illustrating the pocket file shown in FIG. 50 in a closed state. It is a bottom view solution figure of the curve holding part vicinity which shows the operation state of a curve holding part. FIG. 50 is a cross-sectional view showing the pocket file shown in FIG. 50 in an open state. It is a perspective view solution figure of the pocket file which is a modification of the pocket file shown in FIG. FIG. 54 is a cross-sectional view showing the pocket file shown in FIG. 53 in a closed state; It is a bottom view solution figure of the curve holding part vicinity which shows the operation state of a curve holding part. FIG. 54 is a cross sectional view showing the pocket file shown in FIG. 53 in an open state; It is the perspective view solution figure of the pocket file which is a modification of the pocket file shown in FIG. FIG. 57 is a cross-sectional view illustrating the pocket file shown in FIG. 56 in a closed state. It is a bottom view solution figure of the curve holding part vicinity which shows the operation state of a curve holding part. FIG. 57 is a cross sectional view showing the pocket file shown in FIG. 56 in an open state. It is a perspective view solution figure of the pocket file which is a modification of the pocket file shown in FIG. FIG. 60 is a cross sectional view showing the pocket file shown in FIG. 59 in a closed state. It is a bottom view solution figure of the curve holding part vicinity which shows the operation state of a curve holding part. FIG. 60 is a cross sectional view showing the pocket file shown in FIG. 59 in an open state. FIG. 36 is a perspective view illustrating a pocket file as a modification of the pocket file shown in FIG. 35. FIG. 63 is a cross sectional view showing the pocket file shown in FIG. 62 in a closed state; FIG. 63 is a cross sectional view showing the pocket file shown in FIG. 62 in an opened state. 62 is a perspective view illustrating a method of producing the file shown in FIG. 62. FIG. It is explanatory drawing of the file concerning this invention.

Explanation of symbols

10, 410, 610, 810 File 12 Front cover part 14 Back cover part 16 Back cover part 18 Pocket sheet 20 Front connecting part 20A, 22A, 24A, 26A V-shaped groove 22 Back connecting part 24 Front folding part 26 Back folding part Part 28 grip part 30 pocket sheet group 32 outer edge 34 bottom edge 36 opening edge 38 inner edge 40 pocket part 42 mount 50, 450, 650, 850 connecting body 52, 452, 652, 852 cover cover side connecting part 54, 454, 654, 854 Back cover side connection part 56, 456, 656, 856 Intermediary connection part 56a, 56b, 56c, 56d Bridge part 56e, 456e, 656e, 856e Longitudinal bridge part 56f, 456f, 656f, 856f Longitudinal bridge part 58 , 858 Through hole 58a, 858a Upper through hole 58b, 858b Lower through hole 58c Middle through hole 60 Hinge part on the front cover side 62 Hinge part on the back cover side 70 Recess for searching 72 Projection part 80 Cover material 458 Hinge groove 458a Front side hinge groove 458b Back side hinge groove 458c Middle hinge groove 856a Cross-linking part 856b Bridge Portion 856c ₁ cross-linking portion 856c ₂ cross-linking portion 856c ₃ cross-linking portion 856c ₄ cross-linking portion 858c ₁ intermediate through-hole 858c ₂ intermediate through-hole 858c ₃ intermediate through-hole 110, 310, 510, 710 file 112, 312 front cover portion 114 , 314 Back cover part 116, 316 Back cover part 118, 318 Pocket sheet 120, 320 Front connection part 120A, 122A, 124A, 126A, 320A, 322A, 324A, 326A V-shaped groove 121, 123, 321, 323 Portion 122,322 Rear connection portion 124,32 4 Front folding part 125, 325 Front cover side fixing part 126, 326 Back folding part 127, 327 Back cover side fixing part 128, 328 Bending auxiliary member 130, 330 Pocket sheet group 132, 332 Outer edge 134, 334 Bottom edge 136 , 336 Opening edge 138, 338 Inner edge 140, 340 Pocket part 142, 342 Mount 150, 350, 550, 750 Curved holding part 152, 352, 552, 752 Front cover side connecting part 154, 354, 554, 754 Back cover side connecting portion 156,356,556,756 mediated coupling portion 156a, 356a bridge 156b, 356b bridging portion 156c _1, 356c ₁ bridge portion 156c _2, 356c ₂ bridge 156c _3, 356c ₃ bridge portions 156c _4, 356c ₄ crosslinking part 156c ₅ bridge portion 156e, 356e, 5 6e, 756e longitudinal cross section 156f, 356f, 556f, 756f longitudinal cross section 158,358 through hole 158a, the through-hole 158b on the 358a, the through holes 158c ₁ under 358b, 358c ₁ intermediate of the through hole 158c _2, 358c ₂ intermediate Through hole 158c ₃ , 358c ₃ Intermediate through hole 158c ₄ , 358c ₄ Intermediate through hole 160, 360 Front cover side hinge 162, 362 Back cover side hinge 170, 370 Retrieval recess 172, 372 Projection 180, 380 Cover material 558 Hinge groove 558a Front side hinge groove 558b Back side hinge groove 558c Middle hinge groove i Heading S Binding object Z Back heading paper

Claims (13)

A cover body having a front cover part, a back cover part, and a back cover part connected between the front cover part and the back cover part;
A binding body in which a large number of binding sheets are superimposed,
The inside of the back cover where the pocket sheet as the binding sheet extends when the cover sheet is opened at the edge of the pocket sheet group as the binding body that is welded or fixed at the connecting edge of the pocket sheet group as the binding body and connected to the cover body A curved holding portion that curves toward a further away side;
And spine, by a back cover side region between the front bent portion of the cover-side region and the back cover portion and back cover portion between the bent portion and the spine portion of the front cover portion, a back appropriately shaped A curving aid that hardens,
The binding body is connected to the curved holding portion so as to bend and extend in a bow shape toward the direction away from the inside of the spine portion,
The curved holding part is arranged on the outer side in the vicinity of the bent part on the front cover part side and on the back cover part side so that the end edge of the binding body can be bent in a width shorter than the spine width of the spine part. of the bent portion is Oite connected to the inside of the curved auxiliary portion in the vicinity of the file. The curved holding portion is constituted by a cover body in which the binding sheet is connected between the front cover portion and the back cover portion,
The cover body is formed with hinges on the front cover side and back cover side,
The binding body is connected between the hinge part on the front cover side and the hinge part on the back cover side at the end edge connected to the front cover by overlapping a large number of binding sheets ,
Before Symbol binding body, when opening the cover member is formed so as to curve toward the edges of the binding element serving pocket sheet group connected to the cover body on the side away from the inside of the back cover,
The curving auxiliary portion is arranged at an appropriate interval from the binding body in the width direction so that the edge of the binding body connected to the cover can be bent in a width shorter than the spine width of the spine portion. 2. The file according to claim 1, wherein the file is connected to the curved holding portion in the vicinity of the front-side bent portion and in the vicinity of the back-side bent portion outside the hinge portion of the front portion and the hinge portion of the back cover portion. The curved holding portion includes a front cover side hinge portion continuous with the front cover portion, a back cover side hinge portion continuous with the back cover portion, and between the front cover side hinge portion and the back cover side hinge portion. Including an intervening connecting part interposed in the
The intervening connecting portion is formed so as to bend in a direction away from the inside of the back cover together with an edge of the binding body connected to the cover by weight of the binding body when the cover body is opened. 2. The file described in 2. The curved holding part is interposed between a front cover side hinge part connected to the front cover part, a back cover side hinge part connected to the back cover part, and between the front cover side hinge part and the back cover side hinge part Including an intervening connecting part,
The intervening connecting portion is formed so as to bend toward the direction away from the inside of the back cover together with the edge of the binding body connected to the cover by the weight of the binding body when the cover body is opened,
The front cover side area following the front cover side hinge part and the back cover side area following the back cover side hinge part are substantially orthogonal to the intervening connecting part when no load is applied, and when opening the cover, the front cover side hinge And the hinge part on the back cover side move toward the opposite side of the back cover and become narrower than the width of the back cover, and are located inside the folded part on the front cover side and the folded part on the back cover side. ,
Spread the angle between the intermediate connecting portion and the front cover side region and the back cover side region, by a spring of the vicinity of the elasticity and the front cover side hinge portion and the back cover side hinge portion of the material constituting the curved holding portion The file according to any one of claims 1 to 3, wherein the file is formed so as to lift the intervening connecting portion in a direction away from the inside of the spine which is a direction in which the binding sheet extends. The height between the bent portion and the back cover portion of the bending auxiliary portion is between the hinge portion on the front cover side of the bending holding portion and the inner side surface of the bending auxiliary portion and the hinge portion on the back cover side and the bending auxiliary portion. Formed substantially the same or shorter than the height between the inner surface of the part,
When the front cover is closed, the front cover side hinge part and the back cover side hinge part are located near the edge in the width direction of the back cover part,
When the front cover is opened, the interposition connecting part between the front cover side hinge part and the back cover side hinge part is formed to bend toward the opposite side of the back cover part, and the front cover part The file according to any one of claims 2 to 4, wherein a width between the hinge part on the side and the hinge part on the back cover side is formed to be shorter than the width of the spine part.   The file according to any one of claims 1 to 5, wherein the intervening connecting portion of the curved holding portion is formed by plastically deforming the synthetic resin plate body by hot pressing so as to reduce its thickness and impart flexibility. . The binding body has a large number of binding sheets stacked and connected to the cover at the edge connected to the cover .
Curved holding unit includes a connecting member for connecting the concatenated Ru edge and cover of the binding member,
The cover body has a front cover part, a back cover part, and a back cover part between the front cover part and the back cover part, and an appropriate interval between the back cover part and the back cover part. And the binding sheet is connected via the connecting body, and the bending auxiliary portion is configured between the bent portion and the back cover portion and by the spine portion.
The binding body is formed such that when the cover body is opened, the edge of the binding body connected to the cover sheet is curved toward the direction away from the inside of the back cover, which is the direction in which the binding sheet extends,
The curved holding portion is spaced at an appropriate interval from the binding body in the width direction so that the edge connected to the cover of the binding body can be bent in a width shorter than the spine width of the spine portion of the cover body. The file according to claim 1, wherein the files are connected in the vicinity of a bent portion of the front cover portion and a bent portion of the back cover portion. The connecting body includes a front cover side connecting portion connected to the front cover portion side, a back cover side connecting portion connected to the back cover portion side, and between the front cover side connecting portion and the back cover side connecting portion. Including an intervening connecting part interposed,
The intervening connecting portion is connected to the front cover of the binding body by the tension between the front cover side connecting portion and the back cover side connecting portion when the edge connected to the front cover of the binding body is connected and the front cover body is opened. And is formed so as to bend toward the direction away from the inside of the spine, which is the direction in which the binding sheet extends,
The file according to claim 7, wherein a hinge portion is formed between the front cover side connection portion and the interposition connection portion and between the back cover side connection portion and the interposition connection portion. The connecting body includes a front cover side connecting portion connected to the front cover portion side, a back cover side connecting portion connected to the back cover portion side, and between the front cover side connecting portion and the back cover side connecting portion. Including an intervening connecting part interposed,
The intervening connecting portion is formed so as to bend toward the direction away from the inside of the back cover together with the edge of the binding body connected to the cover by the weight of the binding body when the cover body is opened,
A front cover side hinge part and a back cover side hinge part are formed between the front cover side connection part and the intermediate connection part and between the back cover side connection part and the intermediate connection part,
The front cover side connection part following the front cover side hinge part and the back cover side connection part following the back cover side hinge part are substantially orthogonal to the interposition connection part when a load cannot be applied, and when opening the cover, the front cover side The hinge part on the back cover and the hinge part on the back cover side move toward the opposite side of the back cover and are narrower than the width of the spine cover, and are located inside the folded part on the front cover side and the folded part on the back cover side. do it,
Spread the angle between the intermediate connecting portion and the front cover side region and the back cover side region, by a spring of the vicinity of the elasticity and the front cover side hinge portion and the back cover side hinge portion of the material constituting the curved holding portion The file according to claim 7 or 8, wherein the intervening connecting portion is formed so as to be lifted in a direction away from the inside of the spine which is a direction in which the binding sheet extends. The height between the bent portion of the front cover portion and the bent portion of the back cover portion and the back cover portion is between the hinge portion on the front cover side of the coupling body and the inner surface of the front cover portion, and the back cover. The height between the side hinge part and the inner surface of the back cover part is substantially the same or shorter,
When the front cover is closed, the front cover side hinge part and the back cover side hinge part are located near the edge in the width direction of the back cover part,
When the front cover is opened, the interposition connecting part between the front cover side hinge part and the back cover side hinge part is formed to bend toward the opposite side of the back cover part, and the front cover part The file according to any one of claims 7 to 9, wherein a width between the hinge portion on the side and the hinge portion on the back cover side is formed to be shorter than the width of the spine portion.   The file according to any one of claims 7 to 10, wherein the intervening connecting portion of the connecting body is formed by plastically deforming the synthetic resin plate body by hot press processing to reduce its thickness and impart flexibility.   The binding sheet is provided with a pocket combined with a thermoplastic resin sheet, each binding sheet is thermally welded at the edge connected to the cover, and the edge connected to the cover when the binding sheet is opened. The file according to any one of claims 1 to 11, wherein the file is formed to be curved inward.   The connection body is made of a rigid plate made of a thermoplastic synthetic resin, and has a through-hole formed in a region connected to the binding body so as to be curved. File described in.

Images