JP3486179B2 - Cover material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover member, and more particularly to a cover member suitable for use as a cover such as a pipe file.

[0002]

2. Description of the Related Art The cover of a conventional file is, for example, a polypropylene sheet having a relatively large area around a relatively thick cardboard and is folded along the outer peripheral edge of the cardboard from the surface side of the cardboard. There is a so-called case-covered cover sheet, which is formed by bending and adhering it toward the back surface side and further sticking a facing paper on the back surface side of the cardboard.

[0003]

However, the cover formed by the method called so-called case sticking has the following problem.
Since the cover is composed of one cardboard, the load resistance and wear resistance are poor.

Therefore, a main object of the present invention is to provide a cover member which is excellent in load resistance and wear resistance and has a beautiful outer surface.

[0005]

The cover member according to claim 1 of the present invention is such that the cover material has a main part having substantially the same size as the cover part and the spine cover part, and a longitudinal direction from both side edges of the main part. A main part is divided into a front cover side main part and a back cover side main part, and the front cover side main part is divided into a front cover side main part and a back cover side main part, The sub-portion has both sub-portions extending from both side edges of the main portion and having substantially the same size as the front cover portion and the back cover portion, and the sub-portion is the front cover side main portion of the main cover side main portion. A front cover side sub-part having substantially the same size and a back cover side sub-part having substantially the same size as the main part of the back cover, and a first spine cover side extending outward in the longitudinal direction from the sub-cover side sub-part. At a bent portion that is composed of a sub-part and a second spine-cover-side sub-part that extends outward in the longitudinal direction from the back-cover-side sub-part, and intersects the upper edge and the lower edge of the cover material. Both sub-parts are bent to the outside of the main part, both free ends of both sub-parts are located on the spine of the main part, and the main part and the sub-parts are on the upper edge and the lower edge. The first spine cover side sub-portion and the second spine cover side sub-portion are substantially aligned and stacked, and are joined to the outside of the spine cover side main portion. In the cover member according to claim 2 of the present invention, the cover material includes a main part having substantially the same size as the cover part and the spine cover part, and a sub-part that extends outward in the longitudinal direction from both side edges of the main part. The main part is divided into a front cover side main part and a back cover side main part, the front cover side main part is divided into a front cover side main part and a back cover side main part, and the sub parts are both side edges of the main part. Both extended sub-parts have almost the same size as the front cover part and the back cover part, and the sub-parts have the same size as the main part on the front cover side of the main part. From the back cover side sub-part having substantially the same size as the sub-part and the back cover side main part, from the first spine-cover side sub-part and the back cover-side sub-part extending outward in the longitudinal direction from the front cover-side sub-part It is composed of a second sub-cover side sub-part that extends outward in the longitudinal direction, and both sub-parts are bent inside the main part at the bent part that intersects the upper edge and the lower edge of the cover material. Is, located in the spine portion of the free end edges main portions of the secondary portion, and a main portion and a secondary portion upper Endoshi and lower Endoshi is superimposed are substantially aligned, the first
The spine cover side sub-part and the second spine cover side sub-part are cover members joined to the inside of the spine cover side main part. In the cover member according to claim 3 of the present invention, the cover material is formed of the core material and the surface material laminated on the surface of the core material, and the core material has substantially the same size as the cover portion and the spine cover portion. It is composed of a foldable sheet having a main portion and a sub portion that extends outward in the width direction from both side edges of the main portion, and the surface material has a size that extends outward more than the upper end edge and the lower end edge of the core material. Which is a foldable sheet, has a surface material laminated on one main surface of the core material, and the extension of the surface material extending outwardly from the upper end edge and the lower end edge of the core material is the upper end of the core material. A core in which an extension portion of the surface material is overlapped with the core material and the surface material on a line that is folded at the edge and the lower edge to be overlapped with the other main surface of the core material and that intersects with the upper edge and the lower edge of the core material. The top edge of the core material that is folded and folded on the other main surface side of the material Fine lower Endoshi is opposed been substantially aligned, a cover member according to claim 1 or claim 2.

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments of the invention with reference to the drawings.

[0007]

1 is a perspective view of a cover member according to an embodiment of the present invention. FIG. 2 is a sectional view taken along the line AA of FIG. 3 to 13 are perspective view solution diagrams for explaining a method of manufacturing the cover member shown in FIG. The cover member 10 includes a front cover portion 12 including a front cover portion 12a and a back cover portion 12b, a front cover portion 12a and a back cover portion 12
A back cover portion 14 connecting the front cover portion 12a and the back cover portion 12b is provided between the front cover portion 12b and the back cover portion 12b, and a known pipe binder 16 is fixed to the inner surface of the back cover portion 14.

The cover member 10 includes a core 20 made of a foldable sheet such as chip cardboard, and the core 2 described above.
No. 0, a bendable sheet, for example, a surface material 30 made of a polypropylene sheet. The core material 20 has twice the size of the cover sheet portion 12 and the spine cover portion 14 and extends further in the width direction than the cover sheet portion 12 and the spine cover portion 14. The surface material 30 is the upper edge 2 of the core material 20.
2a and the size which extends outward from the lower end edge 22b.

The core member 20 constituting the cover member 10 has a main portion 24 having substantially the same size as the front cover portion 12a, the back cover portion 12b and the spine cover portion 14, and outside the both side edges of the main portion 24. To the front cover portion 12
a and a back cover portion 12b and a sub portion 28 having substantially the same size as the spine cover portion 14, and a main portion 24 of the core material 20,
The combined size of both sub-parts 28 extending from both side edges of the core material 20 has substantially the same size. The main part 24 of the core material 20 is divided into a front cover side main part 24a and a back cover side main part 24b, and the front cover side main part 24a is divided into a front cover side main part 26a and a back cover side main part 26b. It The sub portion 28 of the core member 20 has a front cover side sub portion 28a having substantially the same size as the front cover side main portion 26a of the front cover side main portion 24a of the main portion 24, and a back cover side main portion 26b. A back cover side sub-portion 28b having substantially the same size as the above, and a first spine cover side sub-portion 28c extending outward in the width direction from the front cover side main portion 26a,
A second portion extending outward in the width direction from the back cover side main portion 26b
And the spine cover side sub-part 28d.

The surface material 30 is laminated and adhered to one main surface (surface) of the core material 20. And FIG.
7 to 7, the surface material 3 extending outwardly from the upper edge 22a and the lower edge 22b of the core member 20.
The extension portions 32a and 32b of 0 are the upper edge 2 of the core material 20.
It is bent in the vicinity of 2a and the lower end edge 22b, and is overlapped and adhered to the other main surface (back surface) of the core material 20.

On an imaginary line XX intersecting the upper edge 22a and the lower edge 22b of the core 20, that is,
On the boundary line between the main portion 24 and the sub portion 28 of the core material 20,
Both the core material 20 and the surface material 30 are bent to the other main surface (back surface) side of the core material 20 on which the extension parts 32a and 32b of the surface material 30 are overlapped, and the extension part 3 of the surface material 30 is formed.
Upper edge 22a of the core material 20 in which 2a and 32b are overlapped
The main part 24 and the sub-part 28 of the core material 20 are opposed to each other with the dorsal end and the lower end edge 22b substantially aligned. Then, both free ends of the sub portion 28 have the spine-side main portion 2 of the main portion 24.
The main portion 24 and the sub portion 28 are overlapped so as to be located at 4b and face each other. That is, the first sub-cover side sub-part 28c
And the free end of the second spine cover side sub-part 28d face each other, and the first spine cover side sub-part 28c and the second spine side are formed on the inner surface of the spine cover side main part 24b of the main part 24. The cover side sub-part 28d is joined.

Next, the manufacturing method of the cover member 10 will be described mainly based on the perspective views (FIGS. 3 to 13) for explaining the manufacturing method of the cover member 10. A sheet having a size extending in the width direction more than the front cover portion 12a and the back cover portion 12b constituting the cover portion 12, that is, the front cover portion 12
a foldable sheet that extends in the right side width direction of a and in the left side width direction of the back cover section 12b and has a size twice that of the front cover section 12a, the back cover section 12b, and the spine cover section 14, for example, a comparison A core material 20 made of a rectangular chip cardboard having a desired thickness is prepared (shown in FIG. 3). The core member 20 has a rectangular main portion 2 having substantially the same size as the front cover portion 12a, the back cover portion 12b, and the spine cover portion 14 constituting the cover portion 12.
4 and a rectangular sub-part 28 extending in the width direction from the main part 24 and having a size substantially the same as that of the main part 24. The core member 20 has a main portion 24 having substantially the same size as the front cover portion 12 and the spine cover portion 14, and a sub portion 28 extending outward in the width direction from both side edges of the main portion 24. The main portion 24 is divided into a front cover side main portion 24a and a back cover side main portion 24b, and the front cover side main portion 24a is divided into a front cover side main portion 26a and a back cover side main portion 26b, and a sub portion 28. Is a front cover side sub-part 28a having substantially the same size as the front cover side main part 26a of the front cover side main part 24a of the main part 24 and a back cover side having substantially the same size as the back cover side main part 26b. Sub part 28b, a first spine cover side sub part 28c extending outward in the width direction from the front cover side main part 26a, and a second spine cover extending outward in the width direction from the back cover side main part 26b. It consists of a collateral portion 28d.

On the other hand, the core material 2 is located outward of the upper end edge 22a and the lower end edge 22b of the core material 20, that is, in the vertical direction.
A rectangular surface material 30 made of a foldable sheet, for example, a polypropylene sheet, having a size extending with a width slightly longer than 0 is prepared.

Then, the surface material 30 is superposed on one main surface of the core material 20. That is, the upper edge 2 of the core 20
2a and the surface material 30 extending outwardly from the lower edge 22b
The extended portions 32a and 32b of the core member 20 are placed and bonded with the core members 20 having a substantially same length and extending outwardly from the upper end edge 22a and the lower end edge 22b of the core member 20 (see FIG. 4).
Then, the extension portions 32a and 32 of the surface material 30 extending outwardly beyond the upper end edge 22a and the lower end edge 22b of the core material 20.
B is bent to the other main surface (rear surface) side of the core material 20 in the vicinity of the upper end edge 22a and the lower end edge 22b of the core material 20, and the other main surface (back surface) of the core material 20 is overlaid and adhered to the cover material 4
0 (FIG. 5). The cover material 40 is the cover portion 1
2 and the rectangular main part 44 having substantially the same size as the spine cover part 14, and the substantially same size as the cover part 12 and the spine cover part 14 extending outward in the width direction from the both side edges of the main part 44. And a rectangular sub-portion 48 (shown in FIG. 6).
The main portion 44 has a front cover side main portion 44a and a back cover side main portion 44b, and the front cover side main portion 44a has a front cover side main portion 46a and a back cover side main portion 46b. The sub portion 48 has a front cover side sub portion 48a having substantially the same size as the front cover side main portion 46a of the front cover side main portion 44a of the main portion 44, and a back cover of the front cover side main portion 44a portion of the main portion 44. The back cover side sub-portion 48b having substantially the same size as the side main portion 46b, and the front cover side sub-portion 48.
First spine cover side sub-portion 48c extending outward in the width direction from a
And a second spine cover side sub-portion 48d extending outward in the width direction from the back cover side sub-portion 48b.

On the boundary line between the main portion 24 and the sub portion 28 of the core member 20, that is, the front cover side main portion 46a and the sub portion 4 of the main portion 44.
8 between the front cover side sub-portion 48a and the back cover side main portion 46b of the main portion 44 and the back cover side sub-portion 48b of the sub portion 48 (intersection with the upper end edge 42a and the lower end edge 42b of the cover material 40). In order to facilitate bending of the core material 20 on the imaginary line X-X line), hinge processing is performed to make the core material 20 recessed from the front surface (lower surface in FIG. 7) toward the back surface (upper surface in FIG. 7).

Then, an adhesive is applied to the inner surfaces of the cover-side main portion 44a and the backstrip-side main portion 44b of the main portion 44 of the cover material 40 (the hatched portion in FIG. 8).

On the imaginary line XX intersecting the upper edge 42a and the lower edge 42b of the cover material 40, that is, on the boundary line between the main portion 24 of the core material 20 and the sub portion 28 of the core material 20, the cover material is formed. Both the core material 20 and the surface material 30 which form the surface 40 are extended parts 32 a and 32 of the surface material 30.
The upper end edge 42a and the lower end edge 42b of the cover material 40, which is folded to the other main surface (rear surface) side of the core material 20 with the overlapped b, are substantially aligned and face each other. And
The main portion 4 is arranged so that both free ends of the sub portion 48 of the cover material 40 are located on the spine cover side main portion 44b of the main portion 44 of the cover material 40.
4 and the sub-portion 48 are overlapped. That is, the free end of the first spine cover side sub-portion 48c and the second spine cover side sub-portion 48d.
Of the main portion 44 facing the free end of the back cover side main portion 44b.
The first spine cover side sub-portion 48c and the second spine cover side sub-portion 48d are joined to the outer surface of the (see FIG. 9).

The cover material 40 is bent on the boundary line between the main portion 44 and the sub portion 48 corresponding to the main portion 24 of the core material 20 and the sub portion 28 of the core material 20, and the main portion 44 and the sub portion facing each other are bent. The joint portion where 48 is overlapped is adhered with an appropriate adhesive. The surface material 30 of the superposed cover material 40 is arranged along the peripheral edges of the front cover portion 12a and the back cover portion 12b, which are formed by superposing the main portion 44 and the sub portion 48 of the cover material 40. Are ultrasonically welded and bonded. A virtual line Y- that intersects with the boundary line between the cover sheet portion 12 and the spine cover portion 14, that is, the upper edge 42a and the lower edge 42b of the cover material 40.
On the Y line, in order to facilitate bending of the core material 20, a hinge process is performed in which the cover material 40 is recessed from the front surface (lower surface in FIG. 10) toward the back surface (upper surface in FIG. 10). Next, the attachment hole 50 for attaching the pipe binding tool 16 is provided with the spine cover portion 14
To drill. However, the hinge processing and the hole forming processing may be performed at the same time.

The pipe binder 16 is a binder base 16a.
The cylindrical caulking portion 16b projecting from is fitted into the mounting hole 50, the tip of the caulking portion 16b is caulked, and attached to the spine cover portion 14. The pipe binding tool 16 is attached to the surface of the spine cover side main portion 44b of the cover material 40.

Even if the surface material 30 of the main portion 44 and the surface material 30 of the sub portion 48 are adhered by ultrasonic welding, an adhesive agent for adhering the main portion 44 and the sub portion 48 of the cover material 40 is not applied. Good. In addition, the joint portion where the main portion 44 and the sub portion 48 of the cover material 40 are joined is adhered with an adhesive, and the first back cover side sub portion 48c and the second back cover side sub portion 48d and the back cover side are attached. The surface material 30 constituting them may be adhered to the main portion 44b by ultrasonic welding (hatched portion in FIG. 12).

The main part 24 and the sub-part 28 of the core material 20.
A reinforcing sheet may be interposed between the portions facing each other and bonded together with the reinforcing sheet. That is, the one main surface (back surface) of the core material 20 facing each other and the extension portions 32 a and 32 b of the surface material 30 are the main portion 24 and the sub portion 2 of the core material 20.
Any of the back surfaces of 8 may face each other and be bonded together with the reinforcing sheet.

Next, on the outside of the spine cover portion 14, that is, on the side opposite to the surface on which the pipe binder 16 is attached, a spine heading fixing material 60 made of a rectangular transparent polypropylene film for attaching spine heading paper is fixed. To be done. The spine heading fixing material 60 covers the first spine cover side sub-portion 48c and the second spine cover side sub-portion 48d, and extends over the boundary between the cover portion 12 and the spine cover portion 14 to form the front cover side sub-portion 48a. Back cover side sub-section 48
It is joined to the surface of the surface material 30 of b and welded by ultrasonic waves to form a back pocket (shown in FIG. 13).

According to the method of manufacturing the cover member according to the present invention, the surface material is present on the entire outer peripheral edge of the cover sheet, the core material is not damaged, and the wear resistance is excellent. It is possible to relatively easily manufacture the cover member that is heavy, without increasing the number of steps so much.

Next, another embodiment of the present invention will be described. 14 and 15 are views showing another embodiment of the present invention. The cover member 100 has a cover portion 1
The pipe binder 116 attached to 12 is attached to the surface of the first spine cover side sub-portion 148c and the second spine cover side sub-portion 148d of the cover material 140. The cover material 140 includes a main portion 144 having substantially the same size as the cover portion 112 and the spine cover portion 114, and a sub portion 148 that extends outward in the longitudinal direction from both side edges of the main portion 144. , Front cover side main part 144a and spine cover side main part 144b
And the front cover side main portion 144a is the front cover side main portion 146.
a and the back cover side main portion 146b, and the sub portion 148
The sub-parts extending from both side edges of the main part 144 are the cover part 11
2 and the spine cover portion 114 have substantially the same size. The sub portion 148 has substantially the same size as the front cover side main portion 146a of the front cover side main portion 144a of the main portion 144 and the back side having substantially the same size as the front cover side sub portion 148a and the back cover side main portion 146b. Front cover side sub-part 148b and front cover side sub-part 148
First spine cover side sub-portion 14 extending outward in the longitudinal direction from a.
8c and a second spine cover side sub-portion 148d extending outward in the longitudinal direction from the back cover side sub-portion 148b. Then, at the bent portion that intersects the upper edge 142a and the lower edge 142b of the cover material 140, both sub portions 148 are bent inside the main portion 144, and both free ends of both sub portions 148 are main portions 144.
Located on the spine cover portion 114 of the main portion 144 and the sub portion 148
And the upper end edge 142a and the lower end edge 142b are substantially aligned and overlapped with each other, and the first spine cover side sub-portion 148.
c and the second back cover side sub-part 148d are the back cover side main part 14
It is joined to the inside of 4b. This cover member 100 is
The first spine cover side sub-portion 148c is located inside, and the cover portion 1
12 at the boundary between the back cover portion 114 and the back cover portion 114.
Since a and the back cover part 112b are folded inward,
The first spine cover side sub-part 148c and the second spine cover side sub-part 14
8d and the force acting such that they are pressed toward the spine cover side main portion 144b act, so that the first spine cover side sub-portion 1 is relatively
Both 48c and the second back cover side sub-part 148d are less likely to be peeled off than the back cover side main part 144b. Therefore,
The first spine cover side sub-part 148c and the second spine cover side sub-part 14
8d and the back cover side main portion 144b may be simply bonded with an adhesive. Further, in order to cover the mating surface of the first back cover side sub-part 148c and the second back cover side sub-part 148d, the first back cover side sub-part 148c and the second back cover side sub-part 148d are provided. A covering material 170 such as paper or film may be attached to the surface across the surface.

[0025]

EFFECT OF THE INVENTION In the cover member according to the present invention, the cover material includes a main portion having substantially the same size as the cover portion and the spine cover portion, and a sub portion extending outward in the longitudinal direction from both side edges of the main portion. The sub-portion is a bent portion in which both sub-portions extending from both side edges of the main portion have substantially the same size as the cover portion and the spine cover portion, and intersect with the upper edge and the lower edge of the cover material. , Both sub-parts are bent to the main part side, both free ends of both sub-parts are located on the spine cover part of the main part, and the main part and the sub-parts are overlapped, so all of the outer peripheral edge of the cover page Since the core material is covered with the surface material, the core material has wear resistance without being worn, and both the front cover and the back cover constituting the cover are provided with the double core material, so that the load bearing capacity is high. The cover member also has improved durability and durability.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a cover member according to an embodiment of the present invention.

2 is a cross-sectional view taken along the line AA in FIG.

FIG. 3 is a perspective view illustrating a method of manufacturing a cover member.

FIG. 4 is a perspective view illustrating a method of manufacturing a cover member.

FIG. 5 is a perspective view illustrating a method of manufacturing a cover member.

FIG. 6 is a perspective view illustrating a method for manufacturing a cover member.

FIG. 7 is a perspective view illustrating a method of manufacturing a cover member.

FIG. 8 is a perspective view illustrating a method of manufacturing a cover member.

FIG. 9 is a perspective view illustrating a method of manufacturing a cover member.

FIG. 10 is a perspective view illustrating a method for manufacturing a cover member.

FIG. 11 is a perspective view illustrating a method of manufacturing a cover member.

FIG. 12 is a perspective view illustrating a method of manufacturing a cover member.

FIG. 13 is a perspective view illustrating a method for manufacturing a cover member.

FIG. 14 is a perspective view illustrating a method of manufacturing a cover member according to another embodiment of the present invention.

15 is a cross-sectional view taken along the line AA in FIG.

[Explanation of symbols]

10,100 Cover member 12,112 Cover section 12a, 112a Front cover part 12b, 112b Back cover part 14,114 spine cover 16,116 Pipe binder 16a binding tool base 16b cylindrical caulking part 20 core material 22a Upper edge of core material 22b Lower end edge of core material 24 main body 28 Vice part 24a Cover side main part 24b Back cover side main part 26a Front cover side main part 26b Back cover side main part 28a Sub-side of front cover 28b Sub-part on the back cover side 28c First spine side sub-part 28d Second spine side sub-part 30 surface material 32a, 32b extension 34 Reinforcement sheet 40,140 cover material 42a, 142a Upper edge of cover material 42b, 142b Lower edge of cover material 44,144 Main part 48,148 Sub-part 44a, 144a Main part on cover side 44b, 144b Main part of spine cover 46a, 146a Front cover side main part 46b, 146b Back cover side main part 48a, 148a Sub cover side 48b, 148b Sub-side of back cover 48c, 148c First sub-cover side sub-part 48d, 148d Second sub-cover side sub-part 50 mounting holes 60 spine fixing material 170 coating

Continuation of the front page (56) Reference JP-A-9-183280 (JP, A) JP-A-61-280994 (JP, A) Actually opened 61-118777 (JP, U) Actually opened 53-131731 (JP , U) Actual Kaihei 5-88977 (JP, U) Actual public Sho 29-13223 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B42D 1/00-15/00 B42F 7/00

Claims (3)

(57) [Claims] 1. A cover material includes a main portion having substantially the same size as a cover portion and a spine cover portion, and a sub portion extending outward in the longitudinal direction from both side edges of the main portion, wherein the main portion is , A front cover side main part and a back cover side main part, the front cover side main part is divided into a front cover side main part and a back cover side main part, and the sub part extends from both side edges of the main part. Both sub parts have substantially the same size as the front cover part and the back cover part, and the sub parts have front cover side sub parts having substantially the same size as the front cover side main part of the main cover side main part of the main part. Section and the back cover side main section, the back cover side sub section having substantially the same size as the main section and the back cover side main section, the first spine cover side sub section extending outward in the longitudinal direction from the front cover side sub section, and the back cover side sub section. The second spine cover side sub-part that extends outward in the longer direction, and the bent part that intersects the upper edge and the lower edge of the cover material,
Both sub-parts are bent to the outside of the main part, both free ends of both sub-parts are located on the spine of the main part, and the main part and the sub-parts are on the upper edge and the lower edge. A cover member in which the first spine cover side sub-portion and the second spine cover side sub-portion are substantially aligned and overlapped and joined to the outside of the spine cover side main portion. 2. The cover material includes a main portion having substantially the same size as the cover portion and the spine cover portion, and a sub portion extending outward in the longitudinal direction from both side edges of the main portion, the main portion being , A front cover side main part and a back cover side main part, the front cover side main part is divided into a front cover side main part and a back cover side main part, and the sub part extends from both side edges of the main part. Both sub parts have substantially the same size as the front cover part and the back cover part, and the sub parts have front cover side sub parts having substantially the same size as the front cover side main part of the main cover side main part of the main part. Section and the back cover side main section, the back cover side sub section having substantially the same size as the main section and the back cover side main section, the first spine cover side sub section extending outward in the longitudinal direction from the front cover side sub section, and the back cover side sub section. The second spine cover side sub-part that extends outward in the longer direction, and the bent part that intersects the upper edge and the lower edge of the cover material,
Both sub-parts are folded inside the main part, both free ends of both sub-parts are located on the spine cover part of the main part, and the main part and the sub-parts are placed on the top edge and the bottom edge. A cover member in which the first spine cover side sub-portion and the second spine cover side sub-portion are substantially aligned and joined together and joined to the inside of the spine cover side main portion. 3. The cover material is formed of a core material and a surface material laminated on the surface of the core material, the core material having a main portion having substantially the same size as a cover portion and a spine cover portion, and It is made of a foldable sheet having a sub-portion that extends outward in the width direction from both side edges of the main portion, and the surface material has a size that extends outward more than an upper edge and a lower edge of the core material. , A bendable sheet, wherein the surface material is superposed on one main surface of the core material, and an extension portion of the surface material extending outwardly from an upper edge and a lower edge of the core material is the core material. On the other main surface of the core material by bending at the upper edge and the lower edge of the core material, on the line intersecting the upper edge and the lower edge of the core material, the core material and the surface material, Bent and stacked on the other main surface side of the stacked cores The upper edge of the core material and the lower edge of the core material are almost aligned and face each other,
The cover member according to claim 1 or 2.