JP6927253B2 - Storage container - Google Patents

Description

The present invention relates to an stretch sheet that can be used as a packaging material for fresh foods, cracks, etc., and a storage container using the stretch sheet.

Cushioning materials are used for packaging fresh foods such as fruits and vegetables, and fragile products such as seto products and glass.
As the cushioning material, a sheet-shaped elastic member (Non-Patent Document 1), a plastic film, finely cut paper (Non-Patent Document 2), wood wool, a chip-shaped plastic material, or the like is used. In addition, a cushioning material such as foamed plastic that has been previously molded into the shape of the object to be packaged is also used.

Horiko Co., Ltd. Homepage "Cushioning material Cushioning material pad", [online], [Search on January 27, 2015], Internet <http://www.horiko.jp/shop/wm/mc_005/nova_p.php. > Othello Co., Ltd. Homepage "Packing> Paper-based packing", [online], [Search on January 27, 2015], Internet <http://www.o-cello.co.jp/products/standard/packing/kamitype /kapa11K.html>

The sheet-shaped cushioning material as in Non-Patent Document 1 is easy to handle, but supports only the lower surface side of the packaged object. Therefore, the pressure dispersibility is inferior, and it is difficult to sufficiently prevent deterioration of fruits and the like due to pressurization. In addition, the plastic film tends to apply pressure to the packaged object when it is used by sandwiching the packaged object, and when the packaged object is used without sandwiching the packaged object, the packaged object cannot be sufficiently fixed. In some cases, the protection of the packaged object was lacking.

On the other hand, finely cut paper, wood wool, chip-shaped plastic material, etc. can be filled so as to fill the gaps in the packaging object. Therefore, it has excellent pressure dispersibility and is easy to protect the packaged object. However, since it is fine, it is easily scattered and is complicated to handle at the time of disposal. In addition, since it is bulky, it takes up a storage space and the amount of waste is also large.
In addition, cushioning materials such as foamed plastic that have been molded into the shape of the object to be packaged in advance are suitable for packaging standard products in which many of them have the same shape, but the object to be packaged, such as fruits and vegetables, whose shape is not constant. It is difficult to use.

An object of the present invention is that it has excellent pressure dispersibility for a packaging object, is easy to handle, can be used as a cushioning sheet applicable to various packaging objects, and is also used for various other uses. It is an object of the present invention to provide a possible stretch sheet and a storage container using the stretch sheet.

In order to achieve the above problems, the present invention has adopted the following configuration.
[1] A stretch sheet in which a plurality of cuts are formed on a flat base material.
By the cut, a plurality of two-dimensionally arranged detours and a plurality of branch portions are formed.
The detour is a road having a first end and a second end formed by a continuous region without being cut by the notch.
The length of the shortest path from each first end to the second end via each of the detours is longer than the linear distance between the first end and the second end. Has been
Each detour and the adjacent detour are cut by the notch so that they can be separated from each other.
The branch portion is a portion where the ends of two or more detours meet.
The extension sheet is characterized in that the plurality of branch portions are arranged so that a net is formed when the branch portions that satisfy the following conditions α are directly connected by a detour.
(Condition α)
There are three or more branch portions that are directly connected to the one branch portion by the detour.
[2] Further, it has a frame portion and has a frame portion.
The extension sheet according to [1], wherein the entire plurality of detours and branch portions are arranged inside the frame portion.
[3] The stretch sheet according to [1] or [2], wherein the base material is non-stretchable.
[4] A storage container formed of a substrate surrounding a cavity, wherein a part of the substrate is an extension sheet according to any one of [1] to [3].

The stretchable sheet of the present invention has excellent pressure dispersibility with respect to the object to be packaged, is easy to handle, can be used as a sheet having a buffering action applicable to various objects to be packaged, and can be used for various other uses. It can be used. Further, the storage container of the present invention has excellent pressure dispersibility with respect to the packaging object, is easy to handle, and can be applied to various packaging objects.

It is an extension sheet which concerns on 1st Embodiment of this invention. This is a modified example of the stretch sheet according to the first embodiment of the present invention. It is a partially enlarged view of the stretch sheet which concerns on 1st Embodiment and the modified example. It is an extension sheet which concerns on 2nd Embodiment of this invention. It is a partially enlarged view of the stretch sheet which concerns on 2nd Embodiment. It is an extension sheet which concerns on 3rd Embodiment of this invention. It is a partially enlarged view of the stretch sheet which concerns on 3rd Embodiment. It is an extension sheet which concerns on 4th Embodiment of this invention. It is a partially enlarged view of the stretch sheet which concerns on 4th Embodiment. It is an extension sheet which concerns on 5th Embodiment of this invention. It is a partially enlarged view of the stretch sheet which concerns on 5th Embodiment. It is an extension sheet which concerns on 6th Embodiment of this invention. It is a partially enlarged view of the stretch sheet which concerns on 6th Embodiment. It is a partially enlarged view of the stretch sheet which concerns on 7th Embodiment of this invention. It is a partially enlarged view of the stretch sheet which concerns on 8th Embodiment of this invention. It is a partially enlarged view of the stretch sheet which concerns on 9th Embodiment of this invention. It is a partially enlarged view of the stretch sheet which concerns on the tenth embodiment of this invention. It is a perspective view of the storage container which concerns on embodiment of this invention. It is a top view in the use state of the storage container which concerns on embodiment of this invention. It is a vertical sectional view in the use state of the storage container which concerns on embodiment of this invention. It is a perspective view in the use state of the storage container which concerns on embodiment of this invention. It is a figure which shows the usage mode of the storage container which concerns on embodiment of this invention. It is a figure which shows the usage mode of the stretch sheet of this invention as a packaging material. It is a figure which shows the use mode as a scrubbing brush of the stretch sheet of this invention. It is a figure which shows the usage mode of the stretch sheet of this invention as a storage pouch. It is a figure which shows one aspect of the cut of this invention.

<Extension sheet>
The stretch sheet of the present invention is configured by forming a plurality of cuts in a flat base material, and the plurality of cuts form a plurality of two-dimensionally arranged detours and a plurality of branch portions. Has been done.

As long as the base material is flat, the material is not particularly limited, but it is preferable that the base material is flexible so that the width of the cut can be easily expanded.
Note that flat means flat in a macro sense, and for example, the surface of the base material may have fine irregularities or the surface may be roughened.

The base material is preferably non-stretchable because it has a great benefit of enjoying the effects of the present invention. This is because any stretchable material can be stretched arbitrarily without providing a notch. Further, in the case of a stretchable material, it tends to stretch indefinitely due to the force applied to the material, but in the case of a non-stretchable base material, the degree of stretch is limited by the length of the shortest path. Therefore, in the case of a non-stretchable base material, it is easy to control the degree of stretching.
As the base material, for example, paper, synthetic paper, plastic film, woven fabric, non-woven fabric, metal thin film and the like can be used. The specific material, thickness, strength, etc. of the base material may be appropriately selected according to the intended use.

The notch may be straight or curved. Further, one notch may intersect with another notch or may merge in the middle of the other notch.
Various notch patterns can be adopted as long as a plurality of two-dimensionally arranged detours and a plurality of branch portions can be formed so as to satisfy the conditions described below.
The notch is not limited to a linear notch whose width is negligible, and may be a spindle-shaped, elliptical crescent-shaped, rectangular, circular, or the like. However, from the viewpoint of preventing the base material from being destroyed when stretched, the width of the cut is preferably negligibly small, and for example, a rectangular cut is not preferable. Further, from the viewpoint of preventing the base material from being destroyed when stretched, a circular or elliptical end portion may be provided at the end of the cut. Further, the portion of the notch connected to the end portion may be tapered toward the end portion, and the tapered portion and the end portion may have a liquid picking shape as a whole.

FIG. 26 shows an example in which the end portion Cx is provided at the end of the notch C. The diameter r of the end portion Cx (minor diameter in the case of an ellipse, the same applies hereinafter) is preferably larger than the width of the notch C other than the end portion Cx. The larger the diameter, the greater the effect of preventing the base material from being destroyed starting from the terminal portion Cx when stretched. However, if it is too large, the distance d between the end portion Cx and the other notch C (for example, the distances d1 to d3 in FIG. 26) becomes too close, and the strength of the detour of the portion is lowered, which is not preferable.
Although it depends on the thickness and strength of the base material, for example, in the case of a base material made of a non-woven fabric having a thickness of about 0.13 mm, the diameter r of the terminal portion Cx is preferably 0.2 to 3 mm, more preferably 0.5 to 2 mm. , 0.8 to 1.5 mm is more preferable. The distance d is preferably 1.4 mm or more, more preferably 2 mm or more, and even more preferably 2.5 mm or more.

The detour in the present invention is a road having a first end and a second end formed by continuous regions without being cut by a notch. The length of the shortest path from each first end to the second end via each detour is longer than the linear distance between the first end and the second end. In the present invention, the linear distance means the linear distance on the initial flat base material surface in which the width of the cut is not expanded.

The detour and the adjacent detour are cut by the notch. Therefore, by expanding the width of the notch, it is possible to separate adjacent detours. In the case of a notch having a width that cannot be ignored from the beginning, the separation between adjacent detours means that the width between adjacent detours is larger than the initial width of the notch.

As a general rule, there are branches at the first end and the second end of each detour. The branch portion in the present invention is a portion where the first or second end portions of two or more detours meet.
The branch portion is a region having a certain area, but for convenience, the area may be regarded as a negligible point. The notch may also be formed inside the bifurcation.

When the branch portion Px and the branch portion Py are connected by one detour Rx, and the branch portion Py and the branch portion Pz are further connected by another detour Ry, the branch portion Py detours with the detour Rx. This is the part where the ends of the road Ry meet.
The number of ends of the detour that merges at one branch is not particularly limited as long as it is 2 or more, but from the viewpoint of ease of making a cut, it is preferably 8 or less, and more preferably 6 or less. preferable.

The branch portion Px and the branch portion Py described above are connected by one detour Rx. In that case, these pair of branching parts are said to be directly connected by a detour. The above-mentioned branch portion Px and branch portion Pz are connected by a detour Rx and a detour Ry, but in that case, these pair of branch portions are indirectly connected and are directly connected. I don't say that. In the following description, the term "consolidated" simply means direct concatenation unless otherwise specified.

In the embodiment in which the frame portion described later exists, there is also a detour in which the branch portion exists at the first end portion and the frame portion exists at the second end portion in the portion close to the frame portion. In this case, it is said that the branch portion and the frame portion are connected.
Further, in the embodiment in which the frame portion described later does not exist, there is also a detour such that a branch portion exists at the first end portion and the second end portion reaches the peripheral edge of the extension sheet at the peripheral edge portion thereof.

The length of the shortest path passing through the detour between the branch portions connected by the detour (hereinafter, may be referred to as "shortest distance") is the linear distance between the branch portions (in the present invention, the width of the cut). Means the linear distance on the original flat substrate surface, which is not extended.) Longer than. That is, a notch is provided between the branching portions connected by the detour in the base material so as to cut at least one path connecting the branches with a straight line (hereinafter, may be referred to as a "straight line path"). Has been done.

By expanding the width of the cut that cuts the straight path, the distance between the branches at both ends of the straight path (hereinafter, the distance between the branches that is increased by expanding the width of the cut is extended. Sometimes referred to as "distance") becomes larger. The extension distance does not exceed the shortest distance.
If the thickness of the base material is ignored, the shortest distance becomes the maximum value of the extension distance. In that case, the maximum elongation rate (maximum extension distance / linear distance) between each branch is the shortest distance / linear distance.

In principle, each branch satisfies the following condition α. In the portion near the peripheral edge, only the other two branch portions are connected by a detour, and there is a branch portion that does not satisfy the following condition α.
The number of branching portions to which the branching portions satisfying the condition α are connected is not particularly limited as long as it is 3 or more, but from the viewpoint of ease of providing a cut, it is preferably 8 or less, and more preferably 6 or less. preferable.
(Condition α)
There are three or more branch portions that are directly connected to the one branch portion by the detour.

The plurality of branch portions are arranged so that a network is formed when the branch portions satisfying the condition α are connected by a detour that directly connects the branch portions. In order to form a net, it is necessary to form a ring that serves as a mesh when the branch portions satisfying the condition α are connected by a detour. Three or more branches are required to form a ring.
The number of branching portions forming one mesh is not particularly limited as long as it is 3 or more, but it is preferably 10 or less, and more preferably 8 or less, from the viewpoint of ease of providing cuts and the like. , 6 or less is more preferable.
By satisfying the condition α for each of the branching portions forming one mesh, it is possible to form a network in which the mesh is two-dimensionally expanded.

The stretch sheet of the present invention functions as a stretchable net. If you compare it to a net made of rubber strings, the detour corresponds to the rubber strings, and the branching part corresponds to the intersection of the rubber strings. Since one branch is supported by three or more branches connected by a detour, its position is stable.
The degree of extension between each branch is adjusted by changing the degree of expansion of the width of each notch defining each detour according to the stress applied to each detour.

The position of one branch can be changed in any direction in three dimensions from the position on the original substrate. At that time, it can be changed together with the position of another branch portion connected by the detour, or only the position of one branch portion is changed without changing the position of the other branch portion connected by the detour. You can also do it.
Further, while the position of one branch portion is fixed, the positions of other branch portions connected to the branch portion by a detour can be individually adjusted.

The stretch sheet of the present invention may further have a frame portion. In that case, the entire plurality of detours and branch portions are arranged inside the frame portion. A notch may be formed in the frame portion within a range in which the shape of the peripheral edge of the frame portion can be maintained and in a range in which a new detour or a branch portion is not formed. The shape of the peripheral edge of the frame portion is not particularly limited, and may be a rectangle, a polygon other than a rectangle, a circle, an ellipse, or the like.
The stretch sheet of the present invention can stretch the inside of the frame portion so as to be separated from the plane in which the frame portion exists without deforming the frame portion. Therefore, it is easy to use for applications where the overall shape and area are to be kept constant, such as the substrate constituting the storage container of the present invention.

The extension sheet of the present invention does not have to have a frame portion. In that case, by expanding the widths of the plurality of cuts, it is possible to deform the shape of the entire stretched sheet in a plan view in three dimensions, including expanding the area surrounded by the peripheral edge. can. Therefore, it can be applied to applications such as packaging materials described later.

The method for producing the stretched sheet of the present invention is not particularly limited, but it is preferable to punch the base material in a predetermined pattern. As the punching device, a roller type punching device may be used in addition to the flat plate type punching device.
Further, it may be produced by laser processing the base material.

Hereinafter, the extension sheet of the present invention will be described in detail based on each embodiment. In the following description, for convenience, vertical, horizontal, vertical / horizontal, diagonal, etc. may be described based on the illustration, but the direction of the entire cutting pattern of the stretched sheet is not particularly limited, and for example, on the illustration. The top and bottom may be left and right, the left and right may be up and down, or a notch pattern rotated by 45 ° from the position shown in the figure may be used.

[Extended sheet of the first embodiment]
FIG. 1 is an extension sheet 1A according to the first embodiment of the present invention. In the stretch sheet 1A, a plurality of cuts C are formed in the flat base material 1a. Further, the notch C forms a plurality of two-dimensionally arranged detours R and a branch portion P. Further, the peripheral edge portion of the base material 1a is a frame portion F, and a notch C is formed inside the frame portion.

In the detour circuit R, the detour circuit Rα has branch portions P at both the first end portion and the second end portion. The detour circuit Rβ has a branch portion P at one of the first end portion and the second end portion, and the other is a frame portion F. Further, among the branch portions P, the branch portion Pα satisfies the condition α. On the other hand, the branch portion Pβ1 and the branch portion Pβ2 do not satisfy the condition α. Only one branch is directly connected to the branch Pβ1 by the detour R. There are two branching portions that are directly connected to the branching portion Pβ2 by the detour R.

FIG. 2 is an extension sheet 1B according to a modified example of the first embodiment of the present invention. In the stretch sheet 1B, a plurality of cuts C are formed in the flat base material 1b. The stretch sheet 1B has no frame portion, and the notch C is formed in the entire surface including the peripheral portion of the base material 1b. Further, the notch C forms a plurality of two-dimensionally arranged detours R and a branch portion P.

In the detour circuit R, the detour circuit Rα has branch portions P at both the first end portion and the second end portion. The detour circuit Rβ has a branch portion P at one of the first end portion and the second end portion, but the other reaches the peripheral edge of the extension sheet 1B. Further, among the branch portions P, the branch portion Pα satisfies the condition α. On the other hand, the branch portion Pβ does not satisfy the condition α. Only one branch is directly connected to the branch Pβ1 by the detour R. There are two branching portions that are directly connected to the branching portion Pβ2 by the detour R.

FIG. 3 is a partially enlarged view of the stretch sheet 1A and the stretch sheet 1B. Based on FIG. 3, the notch C in the first embodiment, the detour R formed by the notch C, and the branch portion P will be described in detail.
In the present embodiment, a large number of windmill-shaped cut patterns are combined to form an entire cut pattern. Each windmill-shaped notch pattern has six notches C formed radially at intervals of 60 ° with a single connecting point as a base end, and the tip of each notch is bent at an angle of 60 ° clockwise.

FIG. 3 shows a windmill-shaped cut pattern with the connecting point C11x as the base end, a windmill-shaped cut pattern with the connecting point C12x as the base end, and a windmill-shaped cut pattern with the connecting point C13x as the base end. Other cuts around it are shown.
The windmill-shaped cut pattern with the connection point C11x as the base end is composed of six cuts C of cuts C11a to C11f. The windmill-shaped cut pattern with the connection point C12x as the base end is composed of six cuts C of cuts C12a to C12f. The windmill-shaped cut pattern with the connection point C13x as the base end is composed of six cuts C of cuts C13a to C13f.

As shown in FIG. 3, each wind turbine-shaped notch pattern is arranged such that one notch in each wind turbine-shaped notch pattern is inserted between a pair of notches in the other wind turbine-shaped notch pattern. .. For example, a notch C12d is inserted between the notch C11a and the notch C11f, and a notch C13e is inserted between the notch C11a and the notch C11b.

Further, each of the three windmill-shaped cut patterns is formed so that the bent tip side of one cut in each windmill-shaped cut pattern is separated from each other so as to be along each side of an equilateral triangle. For example, the bent tip sides of the cuts C11a, C12c, and C13e are formed so as to be separated from each other along each side of an equilateral triangle.

The inside of the equilateral triangle intermittently surrounded by these three notches C is the branch portion P of the present embodiment. FIG. 3 shows a point-shaped branch portion P located at the center of gravity of the equilateral triangle as a branch portion P formed inside the equilateral triangle. Specifically, the branch portion P10 is shown as a branch portion P located at the center of gravity of an equilateral triangle intermittently surrounded by the bent tip side of each of the cuts C11a, C12c, and C13e. Further, the branch portions P11 to P13 formed at positions surrounding the branch portions P10 and the branch portions P14a to P14i formed further outside the branch portions P11 to P13 are shown.
The branch portion P of the present embodiment is two-dimensionally arranged so that the other three branch portions P surround one branch portion P in an isotropic and equidistant relationship.

The branch portion P of the present embodiment may be regarded as a region having a certain area inside the equilateral triangle. For example, it may be regarded as a circular branch portion P centered on the center of gravity of the equilateral triangle, such as the branch portion P14e'. Further, it may be regarded as an equilateral triangle-shaped branch portion P centered on the center of gravity of the equilateral triangle, such as the branch portion P14f'.

The branch portions P are connected by a detour R formed by a notch. For example, a region sandwiched between the notch C11a and the notch C13e, a region sandwiched between the notch C13e and the notch C11b, and a region sandwiched between the notch C11b and the notch C13d are between the branch portion P10 and the branch portion P11. It is a detour R11 connecting the above.
Since the straight path between the branch portion P10 and the branch portion P11 is cut by the notch C13e and the notch C11b, the shortest path S11 via the detour R11 passes through the tip of the notch C13e and the tip of the notch C11b. It is a route.

Similarly, the region sandwiched between the notch C12c and the notch C11a, the region sandwiched between the notch C11a and the notch C12d, and the region sandwiched between the notch C12d and the notch C11f are the branch portion P10 and the branch portion P12. It is a detour R12 that connects the two.
Further, the shortest path S12 via the detour R12 is a route that passes through the tip of the notch C11a and the tip of the notch C12d.

Similarly, the region sandwiched between the notch C13e and the notch C12c, the region sandwiched between the notch C12c and the notch C13f, and the region sandwiched between the notch C13f and the notch C12b are the branch portion P10 and the branch portion P13. It is a detour R13 that connects the two.
Further, the shortest path S13 via the detour R13 is a route that passes through the tip of the notch C12c and the tip of the notch C13f.

The detour circuit R11 and the detour circuit R12 are cut by the notch C11a so that they can be separated from each other. The detour circuit R12 and the detour circuit R13 are cut by the notch C12c so that they can be separated from each other. The detour circuit R13 and the detour circuit R11 are cut by the notch C13e so that they can be separated from each other. Similarly, the other adjacent detours R are also cut by the notch C so that they can be separated from each other.
There are three branch portions P11 to P13 that are directly connected to the branch portion P10 by a detour, and satisfy the condition α. The other branch portion P in FIG. 3 also satisfies the condition α.

A hexagonal ring can be formed by connecting these branch portions with a detour that directly connects them. Specifically, a ring composed of a branch portion P10, a branch portion P13, a branch portion P14a, a branch portion P14b, a branch portion P14c, and a branch portion P12 can be formed. Further, a ring composed of a branch portion P10, a branch portion P11, a branch portion P14g, a branch portion P14f, a branch portion P14e, and a branch portion P12 can be formed. These two rings are overlapped and connected between the branch portion P10 and the branch portion P12.
Similarly, rings that are connected one after another, that is, a mesh of nets, can be formed. As a whole, the branch portions P are arranged so as to form a net having each hexagonal ring as a mesh.
Therefore, the stretch sheet of the present embodiment can function as a stretchable net.

[Extended sheet of the second embodiment]
FIG. 4 is an extension sheet 2 according to a second embodiment of the present invention. In the stretch sheet 2, a plurality of cuts C are formed in the flat base material 2a. Further, the notch C forms a plurality of two-dimensionally arranged detours R and a branch portion P. Further, the peripheral edge portion of the base material 2a is a frame portion F, and a notch C is formed inside the frame portion. The second embodiment may be changed to a mode without the frame portion F.

FIG. 5 is a partially enlarged view of the stretch sheet 2. Based on FIG. 5, the notch C in the second embodiment, the detour circuit R formed by the notch C, and the branch portion P will be described.
In the present embodiment, a multi-triangular notch pattern consisting of broken lines is configured so as to draw five similar-shaped equilateral triangles having the same center of gravity, and a large number of these multi-triangular notch patterns are combined to form the whole. A notch pattern is configured.

FIG. 5 shows one of a multi-triangular cut pattern consisting of cuts C20a to C20e, a part of the multi-triangular cut pattern consisting of cuts C22a to C22e, and a multi-triangular cut pattern consisting of cuts C23a to C23e. The section and other notches around it are shown.

As shown in FIG. 5, among the multiple triangular cut patterns consisting of the cuts C20a to C20e, the apex of the outermost triangle drawn by the cut C20e is located at the center of gravity of the multiple triangular cut pattern consisting of the cuts C22a to C22e. It is designed to do. The plurality of multi-triangular notch patterns overlap each other so that their centroids are the vertices of the outermost triangles of the other multi-triangular notch patterns.

The center of gravity of such a multi-triangular cut pattern is the branch portion P of the present embodiment. FIG. 5 shows a branch portion P20 located at the center of gravity of the multi-triangular cut pattern composed of the cuts C20a to C20e. Further, the branch portions P21 to P26 formed at the positions surrounding the branch portion P20 are shown.
The branch portion P of the present embodiment is two-dimensionally arranged so that the other six branch portions P surround one branch portion P in an isotropic and equidistant relationship.
The branch portion P of the present embodiment may also be treated as a branch portion P in a range that does not include a cut in the vicinity of the center of gravity of the multi-triangular cut pattern. For example, it may be regarded as a circular branch portion P (not shown) centered on the center of gravity of the multi-triangular cut pattern.

The branch portions P are connected by a detour R formed by the notch C. A detour R is formed between the similar triangles forming the multiple triangular cut pattern. Further, the breaking positions of the broken lines forming the triangles are staggered so that the detour R between the triangles is connected.

The linear path between the branch P located at the center of gravity of a multi-triangular cut pattern and the branch P located at the apex of the outermost triangle of the multi-triangular cut pattern is the multi-triangular cut. It is cut by the pattern.
Therefore, the shortest path via the detour R between the two branch portions P is a path that sews the breaking position of the multiple triangular cut pattern.

For example, the linear path between the branch portion P20 and the branch portion P22 is cut by the cuts C20b and C20d. Therefore, the shortest paths S22a and S22b between the branch portion P20 and the branch portion P22 via the detour R are routes that pass through the broken tips of the cuts C20a to C20e.
Similarly, the shortest paths S24a and S24b via the detour R between the branch P20 and the branch P24, and the shortest paths S26a and S26b via the detour R between the branch P20 and the branch P26. Is also a path that passes through the broken tips of the cuts C20a to C20e.

On the other hand, the straight path between the branch portion P20 and the branch portion P23 is cut by the broken line-shaped cuts C23b and C23d, which are multiple triangular cut patterns with the position of the branch portion P23 as the center of gravity. The shortest paths S23a and S23b between P20 and the branch portion P23 via the detour R are routes that pass through the broken tips of the cuts C23a to C23e.
Similarly, the shortest paths S21a and S21b via the detour R between the branch P20 and the branch P21, and the shortest paths S25a and S25b via the detour R between the branch P20 and the branch P25. Is also cut in a multi-triangular cut pattern having the respective positions of the branch portion P21 and the branch portion P25 as the center of gravity, and is a path passing through each of the broken tips of these cuts C.

The detour R via the shortest path S22b and the detour R via the shortest path S23a are cut by the notch C23e so that they can be separated from each other. The detour R via the shortest path S23b and the detour R via the shortest path S24a are also cut by the notch C23e so that they can be separated from each other. Similarly, the other adjacent detours R are also cut by the notch C so that they can be separated from each other.
There are six branching portions P21 to P26 that are directly connected to the branching portion P20 by a detour, and satisfy the condition α. The other branch portion P in FIG. 5 also satisfies the condition α.

A triangular ring can be formed by connecting these branch portions with a detour that directly connects them. Specifically, a ring composed of a branch portion P20, a branch portion P21, and a branch portion P26 can be formed. Further, a ring composed of the branch portion P20, the branch portion P21, and the branch portion P22 can be formed. These two rings are overlapped and connected between the branch portion P20 and the branch portion P22.
Similarly, rings that are connected one after another, that is, a mesh of nets, can be formed. As a whole, the branching portions P are arranged so as to form a net having each triangular ring as a mesh.
Therefore, the stretch sheet of the present embodiment can function as a stretchable net.

[Extended sheet of the third embodiment]
FIG. 6 is an extension sheet 3 according to a third embodiment of the present invention. In the stretch sheet 3, a plurality of cuts C are formed in the flat base material 3a. Further, the notch C forms a plurality of two-dimensionally arranged detours R and a branch portion P. Further, the peripheral edge portion of the base material 3a is a frame portion F, and a notch C is formed inside the frame portion. The third embodiment may be changed to a mode without the frame portion F.

FIG. 7 is a partially enlarged view of the stretch sheet 3. Based on FIG. 7, the notch C in the third embodiment, the detour R formed by the notch C, and the branch portion P will be described.
In the present embodiment, a diagonal grid-like cut pattern consisting of broken lines, a vertical-horizontal grid-shaped cut pattern consisting of broken lines, and three similar squares having the same center of gravity as each grid of the vertical-horizontal grid-shaped cut pattern are drawn. As described above, a multi-square cut pattern composed of broken lines is formed, and these are combined to form an entire cut pattern.

As shown in FIG. 7, the diagonal grid-like cut pattern is composed of a plurality of downward-sloping cuts C31a formed in parallel and at equal intervals, and a plurality of upward-sloping cuts C31b formed in parallel and at equal intervals. Has been done. The notch C31a and the notch C31b intersect at an angle of 90 ° at the respective break points and the midpoints of the break points.

The vertical and horizontal grid-like cut patterns are composed of a plurality of horizontal cuts C32a formed in parallel and at equal intervals, and a plurality of vertical cuts C32b formed in parallel and at equal intervals. The notch C31a and the notch C31b are formed in a direction intersecting the diagonal grid-like notch pattern at an angle of 45 °, respectively. Further, the breaking position of the cut C31a and the cut C31b is a position sandwiching the intersection of the diagonal grid-shaped cut patterns.

In the multiple square-shaped cut pattern, the cut C33a, the cut C33b, and the cut C33c are formed in order from the one having a size close to each grid of the vertical and horizontal grid-shaped cut patterns. Both consist of broken lines and are formed to draw a square with the same center of gravity as each grid.

The position of the center of gravity of such a multi-square cut pattern and the break point of the vertical and horizontal grid-shaped cut pattern is the branch portion P of the present embodiment. FIG. 7 shows a branch portion P30 located at the center of gravity of the multiple square cut pattern in the center of the drawing. Further, the branch portions P31 to P34 formed at the vertical and horizontal positions of the branch portion P30 and the branch portions P35 to P38 formed at the oblique positions are shown.

The branch portion P of the present embodiment is two-dimensionally arranged so that the other nine branch portions P surround one branch portion P from the vertical, horizontal, or diagonal directions.
The branch portion P of the present embodiment may also be treated as a branch portion P in a range (break portion range) that does not include the diagonal grid-like cut pattern. For example, the square-shaped branch portion P37a connecting the fractured portions of the diagonal grid-shaped cut pattern may be captured, or the circular branch portion P38a may be captured centering on the center of gravity of the multiple square-shaped cut pattern.

The branch portions P located vertically and horizontally are connected by a detour R formed by the notch C. A detour R is formed between the vertical and horizontal grid-shaped cut patterns and the outer quadrangles forming the multiple quadrangular cut patterns, and between each quadrangle forming the multiple quadrangular cut patterns. Further, the vertical and horizontal grid-like cut patterns and the break positions of the broken line-shaped cuts constituting each quadrangle are staggered so that the detour R between the vertically and horizontally located branch portions P is connected. It has become.

The linear path between the branch portions P located vertically and horizontally is cut by a vertical and horizontal grid-like cut pattern and a multiple square-shaped cut pattern. Therefore, the shortest path that passes through the detour R between the two branch portions P is a path that sews the break position of these cut patterns.

For example, the linear path between the branch portion P30 and the branch portion P31 is cut by the cuts C33b, C33b, and the lateral cut C32a formed between them. Therefore, the shortest paths S31a and S31b between the branch portion P30 and the branch portion P31 via the detour R have multiple square-shaped cuts C33a to C33c having the branch portion P30 as the center of gravity and the branch portion P31 as the center of gravity. It is a path that passes through the broken tips of the multiple square-shaped cuts C33a to C33c and the lateral cuts C32a formed between them.

Similarly, the shortest paths S32a and S32b via the detour R between the branch portion P30 and the branch portion P32 and the shortest paths S33a and S33b via the detour R between the branch portion P30 and the branch portion P33. The shortest paths S34a and S34b via the detour R between the branch portion P30 and the branch portion P34 also have a multi-square notch having each branch portion P as the center of gravity and a vertical cut formed between them. Alternatively, the route is via the broken tip of the lateral notch.

The detour R via the shortest path S31b and the detour R via the shortest path S32a are cut by the notch C31b so that they can be separated from each other. The detour R via the shortest path S32b and the detour R via the shortest path S33a are cut by the notch C31a so that they can be separated from each other. Similarly, the other adjacent detours R are also cut by the notch C so that they can be separated from each other.
There are four branching portions P31 to P34 that are directly connected to the branching portion P30 by a detour, and satisfy the condition α. The other branch portion P in FIG. 7 also satisfies the condition α.

By connecting these branch portions with a detour that directly connects them, a quadrangular ring can be formed. Specifically, a ring composed of a branch portion P30, a branch portion P31, a branch portion P35, and a branch portion P34 can be formed. Further, a ring composed of a branch portion P30, a branch portion P34, a branch portion P38, and a branch portion P33 can be formed. These two rings are overlapped and connected between the branch portion P30 and the branch portion P34.
Similarly, rings that are connected one after another, that is, a mesh of nets, can be formed. As a whole, the branching portions P are arranged so as to form a net having each square ring as a mesh.
Therefore, the stretch sheet of the present embodiment can function as a stretchable net.

[Extended sheet of the fourth embodiment]
FIG. 8 is an extension sheet 4 according to a fourth embodiment of the present invention. In the stretch sheet 4, a plurality of cuts C are formed in the flat base material 4a. Further, the notch C forms a plurality of two-dimensionally arranged detours R and a branch portion P. Further, the peripheral edge portion of the base material 4a is a frame portion F, and a notch C is formed inside the frame portion. The fourth embodiment may be changed to a mode without the frame portion F.

FIG. 9 is a partially enlarged view of the stretch sheet 4. Based on FIG. 9, the notch C in the fourth embodiment, the detour circuit R formed by the notch C, and the branch portion P will be described.
In the present embodiment, at the connection point C41x, the notch C41a, the notch C41b, and the notch C41c intersect at an angle of 60 ° to form an oblique intersection pattern. Further, apart from this diagonal intersection pattern, the notch C42a, the notch C42b, and the notch C42c intersect at a connection point C42x at an angle of 60 ° to form an oblique intersection pattern.
Further, a similar diagonal intersection pattern is formed with the connection point C43x as the intersection. The connection point C41x, the connection point C42x, and the connection point C43x are arranged so as to be the vertices of an equilateral triangle.

Further, between the diagonal intersection pattern with the connection point C41x as the intersection and the diagonal intersection pattern with the connection point C42x as the intersection, they are separated from the pair of intersection patterns on the straight line connecting the connection point C41x and the connection point C42x. A notch C40a is formed. Further, a notch C40b and a notch C40c are formed on both sides of the notch C40a.

Further, a notch C41d having a base end in the middle of the notch C41c and a notch C42d having a base end in the middle of the notch C42b are formed between the notch C40a and the notch C40b. Further, a notch C41e having a base end in the middle of the notch C41b and a notch C42e having a base end in the middle of the notch C42c are formed between the notch C40a and the notch C40c.
Further, a notch C41g having the tip of the notch C41c as the base end and a notch C42g having the middle of the notch C42b as the base end are formed on the outside of the notch C40b. Further, a notch C41f having the tip of the notch C41b as the base end and a notch C42f having the tip of the notch C42c as the base end are formed on the outside of the notch C40c.

Further, between the diagonal intersection pattern with the connection point C41x as the intersection and the diagonal intersection pattern with the connection point C43x as the intersection, the diagonal intersection pattern with the connection point C42x as the intersection and the diagonal intersection pattern with the connection point C43x as the intersection. A plurality of similar cuts are formed between them.

The center of gravity of an equilateral triangle whose vertices are the connection point C41x, the connection point C42x, and the connection point C43x is the branch portion P40 of the present embodiment. Similarly, the center of gravity of an equilateral triangle having the connection point C41x, the connection point C43x, and another connection point as the vertices is the branch portion P41, and the connection point C41x, the connection point C42x, and the other connection point as the vertices of the equilateral triangle. The center of gravity of the equilateral triangle is the branch portion P42, and the center of gravity of an equilateral triangle having the connection point C42x, the connection point C43x, and other connection points as vertices is the branch portion P43.

The branch portion P of the present embodiment is two-dimensionally arranged so that the other three branch portions P surround one branch portion P in an isotropic and equidistant relationship.
The branch portion P of the present embodiment may also be treated as a branch portion P in a range not including a notch in the vicinity of the center of gravity of a triangle having three connecting points as vertices. For example, it may be regarded as a circular branch portion P (not shown) centered on the center of gravity.

The branch portion P40 and the branch portion P42 are connected by a detour R formed by the notch C. A detour R is formed between the cuts C40a to C40c, the cuts C41d to C41g, and the cuts C42d to C42g.
The linear path between the branch portion P40 and the branch portion P42 is cut by the cuts C40a to C40c. Therefore, the shortest paths S42a and S42b that pass through the detour R between the two branch portions P are paths that sew the breaking position of the cut pattern forming the detour R.
Similarly, the shortest paths S41a and S41b via the detour R between the branch P40 and the branch P41 and the shortest paths S43a and S43b via the detour R between the branch P40 and the branch P43. Is formed.

The detour R via the shortest path S41b and the detour R via the shortest path S42a are cut by the notch C41b so that they can be separated from each other. The detour R via the shortest path S42b and the detour R via the shortest path S43a are cut by the notch C42c so that they can be separated from each other. Similarly, the other adjacent detours R are also cut by the notch C so that they can be separated from each other.
There are three branch portions P41 to P43 that are directly connected to the branch portion P40 by a detour, and satisfy the condition α. The other branch portion P in FIG. 9 also satisfies the condition α.

A hexagonal ring can be formed by connecting these branch portions with a detour that directly connects them. Specifically, rings such as rings N41, N42, and N43 as shown in FIG. 8 can be connected and formed. As a whole, the branch portions P are arranged so as to form a net having each hexagonal ring as a mesh.
Therefore, the stretch sheet of the present embodiment can function as a stretchable net.

[Extended sheet of the fifth embodiment]
FIG. 10 is an extension sheet 5 according to a fifth embodiment of the present invention. In the stretch sheet 5, a plurality of cuts C are formed in the flat base material 5a. Further, the notch C forms a plurality of two-dimensionally arranged detours R and a branch portion P. Further, the peripheral edge portion of the base material 5a is a frame portion F, and a notch C is formed inside the frame portion. The fifth embodiment may be changed to a mode without the frame portion F.

FIG. 11 is a partially enlarged view of the stretch sheet 5. Based on FIG. 10, the notch C in the fifth embodiment, the detour circuit R formed by the notch C, and the branch portion P will be described.
In the present embodiment, a large number of windmill-shaped cut patterns are combined to form an entire cut pattern. Each windmill-shaped notch pattern is a pattern in which five notches C are formed radially with a single connecting point as a base end, and the tip of each notch is bent counterclockwise.

FIG. 11 shows a part of a wind turbine-shaped cut pattern consisting of cuts C51a to C51e having the connection point C51x as the base end and a part of the wind turbine-shaped cut pattern consisting of the cuts C52a to C52e having the connection point C52x as the base end. rice field. Similarly, a part of the windmill-shaped notch pattern with the connecting point C53x as the base end, the windmill-shaped notch pattern with the connecting point C54x as the base end, and the windmill-shaped notch with the connecting point C55x as the base end. A part of the pattern is shown.

In the windmill-shaped notch pattern consisting of the notches C51a to C51e with the connection point C51x as the base end, the angle formed by the notch C51a and the notch C51b is 75 °, and the angle formed by the notch C51b and the notch C51c is 60 °. The angle formed by the notch C51c and the notch C51d, the angle formed by the notch C51d and the notch C51e, and the angle formed by the notch C51e and the notch C51a are 75 °, respectively.
Further, the tips of the notches C51a and the notch C51d are bent at an angle of 90 ° counterclockwise, and the tips of the notches C51b, C51c and C51e are bent at an angle of 60 ° counterclockwise. The windmill-shaped notch pattern with another connecting point as the base end is a pattern obtained by rotating the windmill-shaped notch pattern with the connecting point C51x as the base end.

As shown in FIG. 11, each wind turbine-shaped notch pattern is arranged such that one notch in each wind turbine-shaped notch pattern is inserted between a pair of notches in the other wind turbine-shaped notch pattern. .. For example, the notch C51d is inserted between the notch 52b and the notch 52c of the notch pattern having the connection point C52x as the base end.

The portion of the notch in each windmill-shaped notch pattern surrounded by the bent tip is the branch portion P of the present embodiment. FIG. 11 shows a branch portion P50, branch portions P51 to P54 surrounding the branch portion P50, and a branch portion P55 and a branch portion P56 surrounding the branch portion P54 together with the branch portion P50.

The branch portion P of the present embodiment is two-dimensional in such a relationship that the other four branch portions P surround one branch portion P and each of the four branch portions P is surrounded by three branch portions P. Is arranged as a target.
The branch portion P of the present embodiment may also be regarded as a circular branch portion P (not shown) centered on the indicated dot-shaped branch portion P.

The branch portion P50 and the branch portion P51 are connected by a detour R51 formed by the notch C. The detour R51 is between the notch C52c and the notch C51d, between the notch C51d and the notch C52b, and between the notch C52b and the notch C51e.
The linear path between the branch portion P50 and the branch portion P51 is cut by the notch C51d and the notch C52b. Therefore, the shortest path S51 that passes through the detour R51 is a route that passes through the tips of these cuts.

Similarly, the shortest path S52 via the detour R52 between the branch P50 and the branch P52, the shortest path S53 via the detour R53 between the branch P50 and the branch P53, and the branch P50. The shortest path S54 via the detour R54 between the branch portion P54 and the branch portion P54 is formed.
Further, the shortest path S55 via the detour R55 between the branch P54 and the branch P55 and the shortest path S56 via the detour R56 between the branch P54 and the branch P56 are formed. The shortest distance between the branch portion P54 and the branch portion P55 is different from that of the other branch portions described above, and the linear distance is also different.

The detour circuit R51 and the detour circuit R52 are cut by the notch C52c so that they can be separated from each other. The detour circuit R51 and the detour circuit R54 are cut by the notch C51d so that they can be separated from each other. The detour circuit R54 and the detour circuit R55 are cut by the notch C51c so that they can be separated from each other. Similarly, the other adjacent detours R are also cut by the notch C so that they can be separated from each other.
There are four branching portions P51 to P54 that are directly connected to the branching portion P50 by a detour, and satisfy the condition α. Further, there are three branch portions P50, P55, and P56 that are directly connected to the branch portion P54 by a detour, and satisfy the condition α. The other branch portion P in FIG. 11 also satisfies the condition α.

A pentagonal ring can be formed by connecting these branch portions with a detour that directly connects them. Specifically, rings such as rings N51, N52, and N53 as shown in FIG. 10 can be connected and formed. As a whole, the branch portions P are arranged so as to form a net having each pentagonal ring as a mesh.
Therefore, the stretch sheet of the present embodiment can function as a stretchable net.

[Extended sheet of the sixth embodiment]
FIG. 12 is an extension sheet 6 according to a sixth embodiment of the present invention. In the stretch sheet 6, a plurality of cuts C are formed in the flat base material 6a. Further, the notch C forms a plurality of two-dimensionally arranged detours R and a branch portion P. Further, the peripheral edge portion of the base material 6a is a frame portion F, and a notch C is formed inside the frame portion. The sixth embodiment may be changed to a mode without the frame portion F.

FIG. 13 is a partially enlarged view of the stretch sheet 6. Based on FIG. 13, the notch C in the sixth embodiment, the detour circuit R formed by the notch C, and the branch portion P will be described.
In the present embodiment, a plurality of notches C are formed in which both ends of the inverted Z extend in an arc shape.
As shown in FIG. 13, the four cuts C of the cuts C61 to C64 are formed by changing the angle by 90 ° so that one end side extending in each arc shape becomes a spiral shape. Further, notches C65 to C68 intersecting the center of these notches C61 to C64 are formed.

The notch C65 intersects the notch C61 at an angle of 90 ° at the linkage point C61x. The notch C66 intersects the notch C62 at an angle of 90 ° at the junction C62x. The notch C67 intersects the notch C63 at an angle of 90 ° at the linkage point C63x. The notch C68 intersects the notch C64 at an angle of 90 ° at the linkage point C64x.

The inside of the four notches C, in which one end side extending in an arc shape is combined in a spiral shape, is the branch portion P of the present embodiment. FIG. 13 shows a branch portion P60, branch portions P61 to P64 formed on the top, bottom, left and right of the branch portion P60, and four diagonally formed branch portions P65 to P68 of the branch portion P60.
The branching portions P of the present embodiment are arranged two-dimensionally so as to be located at the intersections of the vertical and horizontal lattices. The branch portion P of the present embodiment may also be regarded as a circular branch portion P (not shown) centered on the indicated dot-shaped branch portion P.

The branch portion P60 and the branch portion P61 are connected by a detour R61 formed by the notch C. The detour R61 is between the notch C64 and the notch C61, between the notch C64 and the notch C65, and between the notch C68 and the notch C65.
The linear path between the branch P60 and the branch P61 is cut by the cuts C63, C64, C65, and other cuts that form a swirl around the branch P61. Therefore, the shortest path S61 via the detour R61 is a route that goes through each of the cut C64 and the cut C65 and a tangent to both of them.

Similarly, the shortest path S62 via the detour R62 between the branch P60 and the branch P62, the shortest path S63 via the detour R63 between the branch P60 and the branch P63, and the branch P60. The shortest path S64 via the detour R64 with the branch portion P64 is formed.

The detour circuit R61 and the detour circuit R62 are separated by a notch C61 so that they can be separated from each other. The detour circuit R62 and the detour circuit R63 are cut by the notch C62 so that they can be separated from each other. The detour circuit R63 and the detour circuit R64 are cut by the notch C63 so that they can be separated from each other. The detour circuit R64 and the detour circuit R61 are separated by a notch C64. Similarly, the other adjacent detours R are also cut by the notch C so that they can be separated from each other.
There are four branching portions P61 to P64 that are directly connected to the branching portion P60 by a detour, and satisfy the condition α. The other branch portion P in FIG. 13 also satisfies the condition α.

By connecting these branch portions with a detour that directly connects them, a quadrangular ring can be formed. Specifically, a ring composed of a branch portion P60, a branch portion P61, a branch portion P66, and a branch portion P62 can be formed. Further, a ring composed of a branch portion P60, a branch portion P62, a branch portion P67, and a branch portion P63 can be formed. These two rings are overlapped and connected between the branch portion P60 and the branch portion P62.
Therefore, the stretch sheet of the present embodiment can function as a stretchable net.

[Extended sheet of the seventh embodiment]
FIG. 14 is a partially enlarged view of the stretch sheet according to the seventh embodiment of the present invention. In the present embodiment, portions having different maximum elongation rates (equal to the shortest distance / linear distance if the thickness of the base material is ignored) between the branch portions P are mixed in one stretch sheet.
In FIG. 14, the cuts C71a to C71c that cut the straight path between the branch portion P71 and the branch portion P72 are longer than the cuts C72a to C72c that cut the straight path between the branch portion P72 and the branch portion P73, respectively. Further, the cuts C73a to C73c that cut the linear path between the branch portion P73 and the branch portion P74 are shorter than the cuts C72a to C72c, respectively.

Therefore, the shortest paths S71a and S71b via the detour R between the branch portion P71 and the branch portion P72 are longer than the shortest paths S72a and S72b via the detour R between the branch portion P72 and the branch portion P73. Further, the shortest paths S73a and S73b via the detour R between the branch portion P73 and the branch portion P73 are the shortest.
As a result, the maximum elongation rate is the largest between the branch portion P71 and the branch portion P72, and the smallest between the branch portion P73 and the branch portion P74.
In this way, even if the cut pattern is similar, the elongation rate can be adjusted by adjusting the length thereof.
Even when the maximum elongation rate between the branch portions P in one extension sheet is uniform, the elongation rate can be adjusted by adjusting the length of the cut.

[Extended sheet of the eighth embodiment]
FIG. 15 is a partially enlarged view of the stretch sheet according to the eighth embodiment of the present invention. In this embodiment, a part of the notch is oval.
As shown in FIG. 15, a notch C81a and a notch C81b that intersect at an angle of 90 ° are formed. Further, a pair of short cuts C81c and cuts C81d are connected to both ends of each of the cuts C81a and C81b. Further, an elliptical notch C81e is provided between each intersection of the notch C81a and the notch C81b.
A branch portion P is formed in a quadrangular region surrounded by four pairs of cuts C81c and cuts C81d.

As shown in FIG. 15, the linear path between the branch portion P81a and the branch portion P81b is cut by the notch C81e.
The shortest path S81a and the shortest path S81b via the detour R between the branch portion P81a and the branch portion P81b pass through the tangent line of the cut C81e passing through the tips of the cut C81c and the cut C81d and the peripheral edge of the cut C81e. It is a route.

[Extended sheet of the ninth embodiment]
FIG. 16 is a partially enlarged view of the stretch sheet according to the ninth embodiment of the present invention. In the present embodiment, a circular notch is formed in the branch portion P.
As shown in FIG. 16, a notch C82a and a notch C82b that intersect at an angle of 90 ° are formed. Further, a pair of short cuts C82c and cuts C82d are connected to both ends of each of the cuts C82a and C82b. Further, a notch C82e is provided between each intersection of the notch C82a and the notch C82b. Further, a circular notch C82f is formed in a quadrangular region surrounded by four pairs of notches C82c and the notch C82d.

The branch portion P of the present embodiment may be regarded as a circular region along the peripheral edge of the notch C82f like the branch portions P82a and P82b, or four pairs of cuts like the branch portion P82c and the branch portion P82d. It may be regarded as a quadrangular region surrounded by C82c and the notch C82d.
The shortest paths S82a and S82b in the former case start from the circular region, and the shortest paths S82c and S82d in the latter case start from the quadrangular region.

[Extended sheet of the tenth embodiment]
FIG. 17 is a partially enlarged view of the stretch sheet according to the tenth embodiment of the present invention. In the present embodiment, a cross-shaped notch is formed in the branch portion.
As shown in FIG. 17, a plurality of cuts C83a and cuts C83b that intersect at an angle of 90 ° are formed. Further, a pair of bent short cuts C83c and cuts C83d are connected to both ends of each of the cuts C83a and C83b, respectively. Further, a notch C83e is provided between each intersection of the notch C83a and the notch C83b. Further, a notch C83f is formed in a direction parallel to the notch C83a and a notch C83g is formed in a direction parallel to the notch C83b in a substantially cross-shaped region surrounded by four pairs of notches C82c and the notch C82d. The notch C83f and the notch C83g intersect.

The branch portion P of the present embodiment can be regarded as a substantially cross-shaped region surrounded by four pairs of cuts C83c and cuts C83d, like the branch portions P83a and P83b. The shortest paths S83a and S83b start from the substantially cross-shaped region.
In the present embodiment, the branch portion P itself can be extended due to the presence of the notch formed in the branch portion P.

<Use of stretch sheet>
Hereinafter, a mode of use of the stretch sheet of the present invention will be described. In the following description, the embodiment using the stretch sheet of the first embodiment has been described, but instead of the stretch sheet of the first embodiment, the stretch sheet of another embodiment and other stretches according to the present invention are described. Of course, it can be changed to a sheet.

Further, in the following description, the mode in which only one stretch sheet is used has been described, but a plurality of stretch sheets may be stacked and used. In that case, the number of sheets is not particularly limited, but may be, for example, 2 to 20 sheets. When stacking, it is preferable to stagger the cut patterns so that they do not completely overlap, because they are entangled with each other during use and the shape can be easily fixed. When stacking, the cut pattern of each sheet may be the same or different.

[Storage container]
FIG. 18 is a perspective view of the storage container 10 according to the embodiment of the present invention. The storage container 10 is a container that surrounds a rectangular parallelepiped cavity with six rectangular substrates, and one of the substrates is composed of the extension sheet 1A of the first embodiment.
The notch C of the stretch sheet 1A is opened by pressing. For example, when the central portion is pressed from the outside, as shown in FIG. 19, the width of the notch Ca near the frame portion F does not open so much, but the width widens toward the inside of the notch Cb and the notch Cc. As a result, as shown in FIG. 20, the stretch sheet 1A bends toward the inside of the initial cavity. When the pressure is further increased, the width of the notch C is further widened as shown in FIG.

FIG. 22 is an image diagram showing a state in which the grape 11 is placed and stored in the storage container 10. When an uneven packaging object such as grape is placed on the stretch sheet 1A, the width of the notch C is widened according to the unevenness, and the convex portion bends toward the inside of the initial cavity.
Therefore, according to the storage container 10 of the present embodiment, various types of packaging objects can be stored with excellent pressure dispersibility. Further, since the stretch sheet 1A is composed of one base material, it is easy to handle during storage and disposal.
The base material constituting the stretchable sheet 1A used for the storage container 10 may be appropriately selected according to the purpose of use such as the object to be packaged. For example, when it is important to reduce the load on the packaging object as much as possible, a flexible and cushioning base material can be selected. Further, when the object to be packaged is a heavy object, the base material can be selected with priority given to having sufficient strength.

After the object to be packaged is placed on the surface of the storage container 10 made of the extension sheet 1A and stored, an appropriate lid material may be covered from above the surface.
For the stretch sheet 1A constituting one surface of the storage container 10, a base material having an appropriate strength can be used depending on the object to be packaged.
The stretch sheet 1A in FIG. 22 is the one in which the front and back sides are reversed from those in FIG. 18 and the like.
The storage container of the present invention is not limited to the mode surrounding the rectangular parallelepiped cavity. For example, it may be a mode surrounding a columnar cavity. In that case, the circular substrate that demarcates one of the bottom surfaces may be composed of the extension sheet of the present invention.

[Packaging material]
FIG. 23 is a packaging material 20 using the stretchable sheet of the present invention. The packaging material 20 is composed of the stretch sheet 1B of the first embodiment. After the packaging object is placed on the packaging material 20, when the packaging material 20 is stretched along the packaging object, the packaging material 20 is deformed along the shape of the packaging object. Then, when the two sides of the stretched packaging material 20 meet, the notches in the vicinity of both sides are entangled to exert an anchor effect. Therefore, as shown in FIG. 23, the stored items can be fixed in a packaged state without using a separate fixing means such as cellophane tape (registered trademark) or glue.
The base material constituting the stretchable sheet 1B used for the packaging material 20 may be appropriately selected according to the purpose of use of the packaging object or the like. For example, when it is important to reduce the load on the packaging object as much as possible, a flexible and cushioning base material can be selected. Further, when the anchor effect is emphasized, the base material can be selected with priority given to having a strength sufficient to exert the anchor effect.

[Sawashi]
FIG. 24 is a scrubbing brush 30 using the stretch sheet of the present invention. The scrubbing brush 30 is composed of the stretch sheet 1A of the first embodiment. When the extension sheet 1A is rolled so as to gather the peripheral edges in one place, the cut surface of the cut is exposed to the surface and can be used as a scrubbing brush.
The base material constituting the stretch sheet 1A used for the scrubbing brush 30 may be appropriately selected depending on the material of the object to be cleaned and the like. For example, when it is important not to damage the object to be cleaned, a base material made of a soft material can be selected. Further, when it is desired to perform cleaning with a strong force, a rigid base material can be selected. Further, the base material may be selected with an emphasis on water resistance, or the base material may be selected with an emphasis on water absorption.

[Storage pouch]
FIG. 25 is a storage pouch 40 using the extension sheet of the present invention. The storage pouch 40 is configured by bending the center of the extension sheet 1A of the first embodiment along the lateral direction of FIG.
The side 40a in FIG. 25 is the bent side. Frame portions F, which are overlapped with each other, are adhered to the sides of the sides 40b and 40c. The side of the side 40d is an opening that can be opened in an annular shape without the frame portions F, which are overlapped with each other, being adhered to each other.

When the stored item is inserted through the opening on the side 40d, the notch opens according to the shape and size of the stored item and the branch portion P extends, so that the stored item can be stored.
The base material constituting the stretch sheet 1A used for the storage pouch 40 may be appropriately selected according to the purpose of use and the like. For example, when the protection of stored items is important, a flexible and cushioning base material can be selected. Further, when emphasizing fashionability, a base material having excellent designability can be selected.
A grip may be attached to the side 40d side. Further, the side 40d side may be squeezed through a rubber or a string to form a purse-shaped pouch.

[Other uses]
When a pattern is drawn on the stretch sheet of the present invention in a flat state, it can be used as a three-dimensional mosaic puzzle. That is, if the cuts on the stretch sheet on which the pattern is drawn are opened at random, the cuts are intricately entwined, and you can enjoy the work of returning this to the original pattern.
Further, when the stretch sheet without the frame portion is stretched, a lace pattern can be generated, so that it can be used as a decorative sheet.

1A, 1B, 2, 3, 4, 5, 6, ... Stretch sheet 1a, 1b, 2a, 3a, 4a, 5a, 6a, ... Base material C ... Cut P ... Branch part R ... Detour F ... Frame part N ... Ring 10 ... Storage container 20 ... Packaging material 30 ... Scourer 40 ... Storage pouch

Claims (4)

A storage container formed of six rectangular substrates surrounding a rectangular parallelepiped cavity, one of which is a stretch sheet used as a buffering packaging material with multiple cuts formed in a flat substrate. And
The cuts in the stretch sheet have a combination of windmill-shaped cut patterns consisting of five or six cuts radially formed from a single connecting point.
Each of the five or six cuts is positioned so that the tip side extending radially from the connecting point is bent and all are inserted between the cuts in other wind turbine-shaped cut patterns. And
By the cut, a plurality of two-dimensionally arranged detours and a plurality of branch portions are formed.
The detour is a road having a first end and a second end formed by a continuous region without being cut by the notch.
The length of the shortest path from each first end to the second end via each of the detours is longer than the linear distance between the first end and the second end. Has been
Each detour and the adjacent detour are cut by the notch so that they can be separated from each other.
The branch portion is a portion where the ends of two or more detours meet.
The storage container is characterized in that the plurality of branch portions are arranged so that a net is formed when the branch portions that satisfy the following conditions α are directly connected by a detour.
(Condition α)
There are three or more branch portions that are directly connected to the one branch portion by the detour. Further, the stretch sheet has a frame portion and has a frame portion.
The storage container according to claim 1, wherein the entire plurality of detours and branch portions are arranged inside the frame portion. The storage container according to claim 1 or 2, wherein the base material of the stretch sheet is non-stretchable. The storage container according to any one of claims 1 to 3, which has a circular or elliptical end portion at the end of the notch in the stretch sheet .

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