JP6555118B2 - Extension sheet and storage container - Google Patents

Description

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

Cushioning materials are used for packaging fresh foods such as fruits and vegetables, and fragile products such as Seto and glass.
As the buffer material, a sheet-like 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. Further, a cushioning material such as foamed plastic that has been previously molded into the shape of the packaging object is also used.

HORIKO Co., Ltd. Homepage “Buffer material Buffer material pad”, [online], [Search 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 January 27, 2015], Internet <http://www.o-cello.co.jp/products/standard/packing/kamitype /kapa11K.html>

  The sheet-like cushioning material as in Non-Patent Document 1 is easy to handle, but supports only the lower surface side of the packaging object. Therefore, it is inferior in pressure dispersibility and it is difficult to sufficiently prevent deterioration due to pressurization of fruits and the like. Also, the plastic film is easy to apply pressure to the packaging object when used with the packaging object sandwiched, and when used without the packaging object sandwiched, the packaging object cannot be fixed sufficiently. However, there are cases where the protection of the packaging object is lacking.

On the other hand, finely cut paper, wood wool, chip-shaped plastic materials, etc. can be filled so as to fill the gaps in the packaging object. Therefore, it is excellent in pressure dispersibility and easy to protect the packaging object. However, since it is fine, it is easy to be scattered, and handling at the time of disposal etc. is complicated. Moreover, since it was bulky, it took up a storage place and the amount of disposal also increased.
In addition, cushioning materials such as foamed plastics that have been molded into the shape of the packaging object are suitable for packaging standard products that have many of the same shape, but fruit, vegetables, and other packaging objects that do not have a uniform shape. It is difficult to use.

  The object of the present invention is excellent in pressure dispersibility for packaging objects, easy to handle, and can be used as a cushioning sheet applicable to various packaging objects, and also used for various other purposes. It is an object of the present invention to provide a stretchable sheet and a storage container using the stretchable sheet.

In order to achieve the above object, the present invention employs the following configuration.
[1] An extension sheet in which a plurality of cuts are formed in a flat base material,
By the incision, a plurality of detours and a plurality of branch portions arranged two-dimensionally 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 detour is longer than the linear distance between the first end and the second end. Has been
Between each detour and the adjacent detour, it is cut by the cut and can be separated,
The branch portion is a portion where the end portions of the two or more detours meet,
The stretch sheet is characterized in that the plurality of branch portions are arranged so as to form a net when they are connected by a detour that directly connects the branch portions satisfying the following condition α.
(Condition α)
There are three or more branch portions that are directly connected to the one branch portion by the bypass.
[2] Furthermore, it has a frame part,
The stretch sheet according to [1], wherein the plurality of detours and the entire branching portion are disposed 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 the stretch sheet according to any one of [1] to [3].

  The stretch sheet of the present invention is excellent in pressure dispersibility with respect to an object to be packaged, is easy to handle, can be used as a cushioning sheet applicable to various objects to be packaged, and can be used for various other purposes. It can be used. Further, the storage container of the present invention is excellent in pressure dispersibility with respect to the packaging object, is easy to handle, and can be applied to various packaging objects.

It is an expansion | extension sheet | seat which concerns on the 1st Embodiment of this invention. It is a modification of the expansion | extension sheet | seat which concerns on the 1st Embodiment of this invention. It is a partially expanded view of the stretch sheet according to the first embodiment and its modification. It is an expansion | extension sheet | seat which concerns on the 2nd Embodiment of this invention. It is a partial enlarged view of the expansion | extension sheet | seat which concerns on 2nd Embodiment. It is an expansion | extension sheet | seat which concerns on the 3rd Embodiment of this invention. It is a partial enlarged view of the expansion | extension sheet | seat which concerns on 3rd Embodiment. It is an expansion | extension sheet | seat which concerns on the 4th Embodiment of this invention. It is a partial enlarged view of the expansion | extension sheet | seat which concerns on 4th Embodiment. It is an expansion | extension sheet | seat which concerns on the 5th Embodiment of this invention. It is a partial enlarged view of the expansion | extension sheet | seat which concerns on 5th Embodiment. It is an expansion | extension sheet | seat which concerns on the 6th Embodiment of this invention. It is a partial enlarged view of the expansion | extension sheet | seat which concerns on 6th Embodiment. It is a partial enlarged view of the expansion | extension sheet | seat which concerns on the 7th Embodiment of this invention. It is a partial enlarged view of the expansion | extension sheet | seat which concerns on the 8th Embodiment of this invention. It is the partially expanded view of the expansion | extension sheet | seat which concerns on the 9th Embodiment of this invention. It is a partially expanded view of the expansion | extension sheet | seat which concerns on the 10th Embodiment of this invention. It is a perspective view of a storage container concerning an embodiment of the present invention. It is a top view in the use condition of the storage container concerning the embodiment of the present invention. It is a longitudinal cross-sectional view in the use condition of the storage container which concerns on embodiment of this invention. It is a perspective view in the use condition of the storage container concerning the embodiment of the present invention. It is a figure which shows the usage condition of the storage container which concerns on embodiment of this invention. It is a figure which shows the usage aspect as a packaging material of the expansion | extension sheet | seat of this invention. It is a figure which shows the usage condition as a stub of the expansion | extension sheet | seat of this invention. It is a figure which shows the usage condition as an accommodation pouch of the expansion | extension sheet | seat of this invention. It is a figure which shows the one aspect | mode of the notch | incision 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.

The material of the substrate is not particularly limited as long as it is flat, but it is preferable to have flexibility so that the width of the cut can be easily expanded.
The term “flat” means that the surface is flat in a macro sense. For example, the surface of the substrate may have fine irregularities or the surface may be roughened.

The substrate is preferably non-stretchable because it has a great benefit of enjoying the effects of the present invention. This is because a stretchable material can be arbitrarily stretched without providing a cut. In the case of a stretchable material, there is a tendency to extend indefinitely due to the force applied to the material, but in the case of a non-stretchable base material, the extent of stretching is limited by the length of the shortest path. Therefore, in the case of a non-stretchable substrate, it is easy to control the degree of stretching.
For the base material, for example, paper, synthetic paper, plastic film, woven fabric, non-woven fabric, metal thin film and the like can be used. Specific material, thickness, strength, and the like of the base material may be appropriately selected according to the application.

The cut may be linear or curved. One notch may intersect with another notch, and may merge in the middle of another notch.
As long as a plurality of two-dimensionally arranged bypasses and a plurality of branch portions can be formed so as to satisfy the conditions described below, various cut patterns can be employed.
The notch is not limited to a linear notch whose width can be ignored, but may be a spindle shape, an elliptical crescent shape, a rectangular shape, a circle, or the like. However, from the viewpoint of preventing destruction of the base material when stretched, the width of the cut is preferably small enough to be ignored. For example, a rectangular cut is not preferable. In addition, from the viewpoint of preventing the base material from being broken when it is stretched, a circular or elliptical terminal portion may be provided at the end of the cut. Moreover, the part connected to the termination | terminus part in a notch | incision may be made into the taper shape extended toward a termination | terminus part, and the said taper part and termination | terminus part may be made into the shape of a liquid drop as a whole.

FIG. 26 shows an example in which an end Cx is provided at the end of the cut C. FIG. The diameter r of the end portion Cx (the short diameter in the case of an ellipse, the same applies hereinafter) is preferably larger than the width of the cut C other than the end portion Cx. The larger the diameter, the greater the effect of preventing substrate breakage starting from the terminal portion Cx when stretched. However, if it is too large, the distance d (for example, the distances d1 to d3 in FIG. 26) between the terminal portion Cx and the other cuts C becomes too close, and the strength of the detour in that portion is lowered, which is not preferable.
Depending on the thickness and strength of the base material, for example, in the case of a base material made of a nonwoven 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 further 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 a continuous region without being cut by cutting. 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 addition, in this invention, a linear distance means the linear distance in the original flat base material surface which has not expanded the width | variety of a notch | incision.

  Each detour and the adjacent detour are disconnected by the cut. For this reason, the adjacent detours can be separated by expanding the width of the cut. In the case of a notch with a width that cannot be ignored from the beginning, the separation between adjacent detours means that the distance between adjacent detours is larger than the width of the original notch.

In principle, there are branching portions at the first end and the second end of each detour. In the present invention, the branch portion is a portion where the first or second end portions of two or more detours merge.
The branch portion is a region having a certain area, but may be regarded as a point where the area can be ignored for convenience. The cut may also be formed inside the branch portion.

When the branch part Px and the branch part Py are connected by one detour Rx, and when the branch part Py and the branch part Pz are connected by another detour Ry, the branch part Py bypasses the detour Rx. This is the portion where the ends of the path Ry merge.
There is no particular limitation as long as the number of end portions of the detour joining at one branch portion is 2 or more, but it is preferably 8 or less, and more preferably 6 or less, from the viewpoint of ease of providing cuts. preferable.

  The aforementioned branch part Px and branch part Py are connected by one detour Rx. In that case, it is said that these pair of branch parts are directly connected by a detour. The aforementioned branching part Px and the branching part Pz are connected by the detour Rx and the detour Ry, but in this case, the pair of branching parts are indirectly coupled and directly coupled. I do not say that. In the following description, the term “connection” means direct connection unless otherwise specified.

In an aspect in which a frame portion described later exists, there is a detour in which a branch portion exists at the first end portion and a frame portion exists at the second end portion in a portion close to the frame portion. In this case, it is said that the branch part and the frame part are connected.
Moreover, in the aspect which does not have the frame part mentioned later, there exists a detour in which the branch part exists in the 1st edge part in the peripheral part, and the 2nd edge part reaches the periphery of an expansion | extension sheet | seat.

  The length of the shortest path (hereinafter also referred to as “shortest distance”) via the detour between the branch portions connected by the detour is the straight line distance between the branch portions (in the present invention, the width of the cut). Means a linear distance on the original flat substrate surface that is not expanded). That is, a notch is provided between the branch portions connected by the detour in the base material so as to cut at least one or more paths that connect the straight lines (hereinafter sometimes referred to as “straight path”). It has been.

By expanding the width of the notch that cuts the straight path, the distance between the bifurcations at both ends of the straight path (hereinafter, the distance between the bifurcations that has become larger as the width of the notch is expanded is expanded. Sometimes referred to as “distance”). 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 ratio (maximum extension distance / linear distance) between the branch portions is the shortest distance / linear distance.

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

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

The stretch sheet of the present invention functions as a stretchable net. In the case of a net formed of rubber strings, the detour is the elastic band and the branch is the intersection of the elastic bands. Since one branch part is supported by three or more branch parts connected by a detour, the position is stable.
The degree of expansion between the branch portions 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 portion can be changed from an initial position on the base material in an arbitrary three-dimensional direction. At that time, it can be changed together with the position of the other branch part connected by the detour, or only the position of the one branch part is changed without changing the position of the other branch part connected. You can also.
Moreover, the position of the other branch part connected with the branch part by a detour can also be adjusted separately, fixing the position of one branch part.

The stretch sheet of the present invention may further have a frame portion. In that case, the whole of the plurality of detours and the branch part is arranged inside the frame part. The frame portion may be formed with cuts within a range in which the shape of the peripheral edge of the frame portion can be maintained, and within a range in which a new detour or branch 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 part away from the plane where the frame part exists without deforming the frame part. Therefore, it is easy to use it for an application in which the entire shape and area are desired to be constant like the substrate constituting the storage container of the present invention.

  The stretch sheet of the present invention may not have a frame portion. In that case, by expanding the width of the plurality of cuts, the shape of the entire stretched sheet in a plan view can be deformed, and the area surrounded by the periphery can be expanded in three dimensions. it can. Therefore, it is applicable to uses such as a packaging material described later.

Although there is no limitation in particular in the manufacturing method of the expansion | extension sheet | seat of this invention, It is preferable to punch a base material with a predetermined pattern. As the punching device, a roller punching device may be used in addition to the flat plate punching device.
Moreover, you may manufacture by carrying out the laser processing of the base material.

Hereinafter, based on each embodiment, the expansion sheet of the present invention is explained in full detail. In the following description, for convenience, there may be explanations such as up and down, left and right, vertical and horizontal, diagonal, etc., but there is no particular limitation on the direction of the entire cut pattern of the stretched sheet. The top and bottom may be left and right, the left and right may be top and bottom, or a cut pattern rotated by 45 ° from the illustrated position.
The first embodiment, the fifth embodiment, and the sixth embodiment are reference embodiments.

[Extension sheet of the first embodiment]
FIG. 1 shows a stretch sheet 1A according to the first embodiment of the present invention. The stretch sheet 1A has a plurality of cuts C formed in a flat substrate 1a. In addition, a plurality of detours R and branching portions P that are two-dimensionally arranged are formed by the cuts C. Moreover, the peripheral part of the base material 1a is made into the frame part F, and the notch | incision C is formed inside the said frame part.

  Of the detour R, the detour Rα has a branch P at both the first end and the second end. In the detour Rβ, the branch portion P exists at one of the first end and the second end, but the other is the frame portion F. Further, the branch portion Pα among the branch portions P satisfies the condition α. On the other hand, the branch part Pβ1 and the branch part Pβ2 do not satisfy the condition α. Only one branch is directly connected to the branch Pβ1 by the detour R. Two branch parts are directly connected to the branch part Pβ2 by the detour R.

  FIG. 2 shows an extension sheet 1B according to a modification of the first embodiment of the present invention. In the stretch sheet 1B, a plurality of cuts C are formed in a flat substrate 1b. The stretchable sheet 1B has no frame portion, and the cut C is formed entirely including the peripheral edge portion of the substrate 1b. In addition, a plurality of detours R and branching portions P that are two-dimensionally arranged are formed by the cuts C.

  Of the detour R, the detour Rα has a branch P at both the first end and the second end. The detour Rβ has a branch portion P at one of the first end and the second end, but the other reaches the periphery of the stretchable sheet 1B. Further, the branch portion Pα among the branch portions P satisfies the condition α. On the other hand, the branch part Pβ does not satisfy the condition α. Only one branch is directly connected to the branch Pβ1 by the detour R. Two branch parts are directly connected to the branch part 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 cut C in the first embodiment, and the detour R and the branch portion P formed by the cut C will be described in detail.
In the present embodiment, the entire cutting pattern is configured by combining a number of windmill-shaped cutting patterns. Each windmill-like cut pattern has a configuration in which six cuts C are formed radially at 60 ° intervals with a single connection point as a base, and the leading ends of the cuts are bent at an angle of 60 ° in the clockwise direction.

In FIG. 3, a windmill-shaped cutting pattern having a connection point C11x as a base, a windmill-shaped cutting pattern having a connection point C12x as a base, a windmill-shaped cutting pattern having a connection point C13x as a base, Other notches around it were shown.
The windmill-like cut pattern having the base of the connection point C11x is composed of six cuts C of cuts C11a to C11f. The windmill-like cut pattern having the base of the connection point C12x is composed of six cuts C, ie, cuts C12a to C12f. The windmill-like cut pattern having the connection point C13x as a base end includes six cuts C of cuts C13a to C13f.

  As shown in FIG. 3, each windmill-shaped cut pattern is arranged so that one cut in each windmill-shaped cut pattern is inserted between a pair of cuts in another windmill-shaped cut pattern. . For example, a cut C12d is inserted between the cuts C11a and C11f, and a cut C13e is inserted between the cuts C11a and C11b.

  Further, the three windmill-like cut patterns are formed so as to be spaced apart from each other so that the bent leading end side of each windmill-like cut pattern is along each side of the equilateral triangle. For example, the bent leading ends of the cuts C11a, C12c, and C13e are formed so as to be separated from each other so as to follow each side of the equilateral triangle.

And the inside of the equilateral triangle intermittently enclosed by such three notches C is the branch part P of this embodiment. FIG. 3 shows a point-like branch P located at the center of gravity of the regular triangle as the branch P formed inside the regular triangle. Specifically, the branch portion P10 is shown as the 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. Moreover, the branch parts P11-P13 formed in the position surrounding the branch part P10 and the branch parts P14a-P14i formed further outside the branch parts P11-P13 are shown.
The branch part P of the present embodiment is two-dimensionally arranged around the one branch part P in such a relationship that the other three branch parts P are isotropic and equidistant.

  Note that the branching portion P of the present embodiment may be regarded as a region having a certain area inside the regular triangle. For example, it may be understood as a circular branch portion P centered on the center of gravity of the regular triangle, such as a branch portion P14e '. Further, it may be regarded as a regular triangular branch P having the center of the equilateral triangle as the center, such as a branched P14f '.

The branch portions P are connected by a detour R formed by cutting. 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 part P10 and the branch part P11. Is a detour R11 connecting the two.
Since the straight path between the branch part P10 and the branch part P11 is cut by the notch C13e and the notch C11b, the shortest path S11 passing through the detour R11 passes through the tip of the notch C13e and the tip of the notch C11b. It is a route.

Similarly, a region sandwiched between the notch C12c and the notch C11a, a region sandwiched between the notch C11a and the notch C12d, and a region sandwiched between the notch C12d and the notch C11f are the branching portion P10 and the branching portion P12. It becomes detour R12 which connects between.
Further, the shortest path S12 passing through the detour R12 is a path passing through the tip of the cut C11a and the tip of the cut C12d.

Similarly, an area sandwiched between the notch C13e and the notch C12c, an area sandwiched between the notch C12c and the notch C13f, and an area sandwiched between the notch C13f and the notch C12b are the branching portion P10 and the branching portion P13. It becomes detour R13 which connects between.
Further, the shortest path S13 that passes through the detour R13 is a path that passes through the tip of the cut C12c and the tip of the cut C13f.

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

When these branch parts are connected by a detour that directly connects the hexagonal parts, a hexagonal ring can be formed. Specifically, a ring composed of the branch part P10, the branch part P13, the branch part P14a, the branch part P14b, the branch part P14c, and the branch part P12 can be formed. Moreover, the ring which consists of branch part P10, branch part P11, branch part P14g, branch part P14f, branch part P14e, and branch part P12 can be formed. These two rings are overlapped and connected between the branch part P10 and the branch part P12.
Similarly, it is possible to form rings that are connected one after another, that is, a mesh. 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 this embodiment can function as a stretchable net.

[Extension Sheet of Second Embodiment]
FIG. 4 shows a stretchable sheet 2 according to the second embodiment of the present invention. The stretch sheet 2 has a plurality of cuts C formed in a flat substrate 2a. In addition, a plurality of detours R and branching portions P that are two-dimensionally arranged are formed by the cuts C. Moreover, the peripheral part of the base material 2a is made into the frame part F, and the notch | incision C is formed inside the said frame part. In addition, you may change 2nd Embodiment to the aspect without the frame part F. FIG.

FIG. 5 is a partially enlarged view of the stretchable sheet 2. Based on FIG. 5, the notch C and the detour R and the branch part P formed by the notch C in 2nd Embodiment are demonstrated.
In the present embodiment, a multi-triangular cut pattern composed of broken lines is configured so as to draw five equilateral triangles having the same center of gravity, and a plurality of multi-triangular cut patterns are combined, A cut pattern is configured.

  FIG. 5 shows an example of a multi-triangular cut pattern made of cuts C20a to C20e, a part of a multi-triangular cut pattern made of cuts C22a to C22e, and a multi-triangular cut pattern made of cuts C23a to C23e. And other cuts around it.

  As shown in FIG. 5, the vertex of the outermost triangle drawn by the cut C20e among the multiple triangle cut patterns formed by the cuts C20a to C20e is located at the center of gravity of the multiple triangle cut pattern formed by the cuts C22a to C22e. It is supposed to be. The plurality of multi-triangular cut patterns overlap each other such that the center of gravity is the vertex of the outermost triangle of the other multi-triangular cut patterns.

The center of gravity of such a multi-triangular cut pattern is the branching portion P of the present embodiment. FIG. 5 shows a branch P20 located at the center of gravity of a multi-triangular cut pattern made of cuts C20a to C20e. Moreover, the branch parts P21-P26 formed in the position surrounding this branch part P20 were shown.
The branch part P of the present embodiment is two-dimensionally arranged around the one branch part P so that the other six branch parts P are isotropic and equidistant.
In addition, the branch part P of this embodiment may also treat the range not including the cut near the center of gravity of the multi-triangular cut pattern as the branch part P. For example, it may be understood as a circular branch 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 a cut C. A detour R is formed between similar triangles constituting a multi-triangular cut pattern. In addition, the broken positions of the broken line-shaped cuts constituting each triangle are staggered, whereby the detour R between each triangle is connected.

A straight path between the branch P located at the center of gravity of a multi-triangular cut pattern and the branch P located at the vertex of the outermost triangle of the multi-triangle cut pattern is the multi-triangle cut It is cut by the pattern.
Therefore, the shortest path that passes through the detour R between the two branch portions P is a path that stitches the break position of the multi-triangular cut pattern.

For example, the straight path between the branch part P20 and the branch part P22 is cut by the cuts C20b and C20d. Therefore, the shortest paths S22a and S22b between the branch part P20 and the branch part P22 that pass through the detour R are paths that pass through the broken ends 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 a path that passes through the broken tip of each of the cuts C20a to C20e.

On the other hand, the straight path between the branch part P20 and the branch part P23 is cut by the broken-line cuts C23b and C23d, which are multi-triangular cut patterns with the position of the branch part P23 as the center of gravity. The shortest paths S23a and S23b passing through the detour R between the P20 and the branch part P23 are paths passing through the broken ends of the cuts C23a to C23e.
Similarly, the shortest paths S21a and S21b via the detour R between the branch part P20 and the branch part P21 and the shortest paths S25a and S25b via the detour R between the branch part P20 and the branch part P25. Are cut by a multi-triangular cut pattern with the respective positions of the branching portion P21 and the branching portion P25 as the center of gravity, and the path passes through the broken tip of each of the cuts C.

The detour R through which the shortest path S22b passes and the detour R through which the shortest path S23a passes can be separated by being cut by a cut C23e. The detour R through which the shortest path S23b passes and the detour R through which the shortest path S24a passes can also be cut and separated by the cut C23e. Similarly, the other adjacent detours R can also be separated by being cut by a cut C.
There are six branch parts P21 to P26 that are directly connected to the branch part P20 by a detour, and the condition α is satisfied. The other branch part P in FIG. 5 also satisfies the condition α.

When these branch portions are connected by a detour that directly connects the branch portions, a triangular ring can be formed. Specifically, a ring composed of the branch part P20, the branch part P21, and the branch part P26 can be formed. Moreover, the ring which consists of the branched part P20, the branched part P21, and the branched part P22 can be formed. The two rings are overlapped and connected between the branch part P20 and the branch part P22.
Similarly, it is possible to form rings that are connected one after another, that is, a mesh. As a whole, the branching portion P is arranged so as to form a net having each triangular ring as a mesh.
Therefore, the stretch sheet of this embodiment can function as a stretchable net.

[Extension Sheet of Third Embodiment]
FIG. 6 shows a stretchable sheet 3 according to the third embodiment of the present invention. The stretch sheet 3 has a plurality of cuts C formed in a flat substrate 3a. In addition, a plurality of detours R and branching portions P that are two-dimensionally arranged are formed by the cuts C. Moreover, the peripheral part of the base material 3a is made into the frame part F, and the notch C is formed inside the said frame part. In addition, you may change 3rd Embodiment to the aspect without the frame part F. FIG.

FIG. 7 is a partially enlarged view of the stretchable sheet 3. Based on FIG. 7, the notch C and the detour R and the branch part P formed by the notch C in 3rd Embodiment are demonstrated.
In the present embodiment, a diagonal grid-like cut pattern consisting of broken lines, vertical and horizontal grid-like cut patterns consisting of broken lines, and three similar squares having the same center of gravity as the vertical and horizontal grid-like cut patterns are drawn. Thus, a multi-rectangular cut pattern composed of broken lines is formed, and these are combined to form the entire cut pattern.

  As shown in FIG. 7, the oblique grid-like cut pattern is composed of a plurality of lower right cuts C31a formed in parallel and at equal intervals, and a plurality of upper right cuts C31b formed in parallel and at equal intervals. Has been. The incision C31a and the incision C31b intersect at an angle of 90 ° at the middle point between the breakage point and the breakage point.

  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 cuts C31a and the cuts C31b are each formed in a direction intersecting with the oblique grid-like cut pattern at an angle of 45 °. Further, the breaking positions of the cuts C31a and C31b are positions where the intersections of the diagonal lattice cut patterns are sandwiched.

  The multi-rectangular cut patterns are formed with cuts C33a, cuts C33b, and cuts C33c in order from a size close to each of the vertical and horizontal cut patterns. Each is composed of a broken line and is formed so as to draw a square having the same center of gravity as each lattice.

  A position that is the center of gravity of such a multi-rectangular cut pattern and is a broken portion of the vertical and horizontal grid cut patterns is the branching portion P of the present embodiment. FIG. 7 shows a branching portion P30 located at the center of gravity of the multi-rectangular cut pattern in the center of the figure. Moreover, the branch parts P31-P34 formed in the vertical and horizontal position of this branch part P30, and the branch parts P35-P38 formed in the diagonal position were shown.

In the branch portion P of the present embodiment, the other nine branch portions P are two-dimensionally arranged around the one branch portion P in such a manner that the other nine branch portions P surround the vertical and horizontal directions or oblique directions.
In addition, the branch part P of this embodiment may also treat the range (breaking part range) which does not include the diagonal grid-like cutting pattern as the branch part P. For example, a square-shaped branch portion P37a that connects the broken portions of the diagonal lattice-shaped cut pattern may be captured, or a circular branch portion P38a may be captured centering on the center of gravity of the multiple-square-shaped cut pattern.

  The branch portions P positioned vertically and horizontally are connected by a detour R formed by a cut C. A detour R is formed between the vertical and horizontal grid-like cut patterns and the outer squares forming the multiple square cut patterns, and between the squares forming the multiple square cut patterns. Further, the vertical and horizontal grid-like cut patterns and the broken positions of the broken-line cuts forming each quadrangle are staggered, so that the detours R between the branch portions P positioned in the vertical and horizontal directions are connected. It has become.

  A straight path between the branch portions P positioned in the vertical and horizontal directions is cut by a vertical and horizontal grid-like cut pattern and a multi-square cut pattern. Therefore, the shortest path that passes through the detour R between the two branch portions P is a path that stitches the break positions of these cut patterns.

  For example, the straight path between the branch part P30 and the branch part P31 is cut by the cuts C33b, C33b, and a horizontal cut C32a formed therebetween. Therefore, the shortest paths S31a and S31b between the branch part P30 and the branch part P31 via the detour R are multi-square cuts C33a to C33c having the branch part P30 as the center of gravity, and the branch part P31 as the center of gravity. This is a path that passes through the broken tips of the multiple rectangular cuts C33a to C33c and the horizontal cuts C32a formed therebetween.

  Similarly, the shortest paths S32a and S32b that pass through the detour R between the branch part P30 and the branch part P32, and the shortest paths S33a and S33b that pass through the detour R between the branch part P30 and the branch part P33 The shortest paths S34a and S34b that pass through the detour R between the branch part P30 and the branch part P34 are also cut into a multi-rectangular shape with the center of gravity of each branch part P to be connected, and the vertical paths formed therebetween. Or it becomes a path | route via the front-end | tip where the cut | interruption of the horizontal direction cut | disconnected.

The detour R through which the shortest path S31b passes and the detour R through which the shortest path S32a passes can be separated by being cut by a cut C31b. The detour R via the shortest path S32b and the detour R via the shortest path S33a can be separated by being cut by a cut C31a. Similarly, the other adjacent detours R can also be separated by being cut by a cut C.
There are four branch parts P31 to P34 that are directly connected to the branch part P30 by a detour and satisfy the condition α. The other branch part P in FIG. 7 also satisfies the condition α.

When these branch parts are connected by a detour that directly connects the two branches, a quadrangular ring can be formed. Specifically, a ring composed of the branch part P30, the branch part P31, the branch part P35, and the branch part P34 can be formed. Moreover, the ring which consists of the branch part P30, the branch part P34, the branch part P38, and the branch part P33 can be formed. The two rings are overlapped and connected between the branch part P30 and the branch part P34.
Similarly, it is possible to form rings that are connected one after another, that is, a mesh. As a whole, the branch portions P are arranged so as to form a net having each square ring as a mesh.
Therefore, the stretch sheet of this embodiment can function as a stretchable net.

[Extension Sheet of Fourth Embodiment]
FIG. 8 shows a stretchable sheet 4 according to the fourth embodiment of the present invention. The stretch sheet 4 has a plurality of cuts C formed in a flat substrate 4a. In addition, a plurality of detours R and branching portions P that are two-dimensionally arranged are formed by the cuts C. Moreover, the peripheral part of the base material 4a is made into the frame part F, and the notch C is formed inside the said frame part. In addition, you may change 4th Embodiment to the aspect without the frame part F. FIG.

FIG. 9 is a partially enlarged view of the stretchable sheet 4. Based on FIG. 9, the notch C and the detour R and the branch part P formed by the notch C in 4th Embodiment are demonstrated.
In the present embodiment, at the connection point C41x, the cuts C41a, C41b, and C41c intersect at an angle of 60 ° to form an oblique intersection pattern. Further, apart from this oblique intersection pattern, the cuts C42a, C42b, and C42c intersect at an angle of 60 ° at the connection point C42x to form an oblique intersection pattern.
In addition, a similar oblique intersection pattern having a connection point C43x as an intersection is formed. The connection point C41x, the connection point C42x, and the connection point C43x are arranged to be the vertices of an equilateral triangle.

  In addition, between the diagonal intersection pattern having the intersection point C41x and the diagonal intersection pattern having the intersection point C42x as the intersection point, the distance between the pair of intersection patterns is separated on a straight line connecting the connection point C41x and the connection point C42x. A cut C40a is formed. Further, a cut C40b and a cut C40c are formed on both sides of the cut C40a.

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

  Further, between an oblique intersection pattern having the intersection C41x as an intersection and an oblique intersection pattern having the intersection C43x as an intersection, an oblique intersection pattern having the intersection C42x as an intersection and an oblique intersection pattern having the intersection C43x as an intersection. A plurality of similar cuts are formed between them.

  Then, the center of gravity of the equilateral triangle whose vertex is 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 the equilateral triangle whose vertices are the linking point C41x, the linking point C43x, and the other linking point is the bifurcation P41, and the equilateral triangle whose vertices are the linking point C41x, the linking point C42x, and the other linking points. The center of gravity of the right triangle is a branching portion P42, and the center of gravity of an equilateral triangle having apexes at the connection point C42x, the connection point C43x, and another connection point is the branching portion P43.

The branch part P of the present embodiment is two-dimensionally arranged around the one branch part P in such a relationship that the other three branch parts P are isotropic and equidistant.
In addition, the branch part P of this embodiment may also handle the range not including the cut in the vicinity of the center of gravity of the triangle having the three connection points as vertices as the branch part P. For example, it may be understood as a circular branch P (not shown) centered on the center of gravity.

The branch part P40 and the branch part P42 are connected by a detour R formed by a cut C. The detour R is between the cuts C40a to C40c, the cuts C41d to C41g, and the cuts C42d to C42g.
The straight path between the branch part P40 and the branch part P42 is cut by 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 positions of the cut pattern that forms the detour R.
Similarly, the shortest paths S41a and S41b via the detour R between the branch part P40 and the branch part P41 and the shortest paths S43a and S43b via the detour R between the branch part P40 and the branch part P43. Is formed.

The detour R via the shortest path S41b and the detour R through the shortest path S42a can be separated by being cut by a cut C41b. The detour R through which the shortest path S42b passes and the detour R through which the shortest path S43a passes can be separated by being cut by a cut C42c. Similarly, the other adjacent detours R can also be separated by being cut by a cut C.
The branch portions directly connected to the branch portion P40 by a detour are three branch portions P41 to P43, which satisfy the condition α. The other branch part P in FIG. 9 also satisfies the condition α.

When these branch parts are connected by a detour that directly connects the hexagonal parts, a hexagonal ring can be formed. Specifically, it can be formed by connecting rings such as rings N41, N42, and N43 as shown in FIG. 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 this embodiment can function as a stretchable net.

[Extension Sheet of Fifth Embodiment]
FIG. 10 shows a stretchable sheet 5 according to the fifth embodiment of the present invention. The stretch sheet 5 has a plurality of cuts C formed in a flat substrate 5a. In addition, a plurality of detours R and branching portions P that are two-dimensionally arranged are formed by the cuts C. Moreover, the peripheral part of the base material 5a is made into the frame part F, and the notch C is formed inside the said frame part. In addition, you may change 5th Embodiment to the aspect without the frame part F. FIG.

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

  FIG. 11 shows a part of a windmill-like cut pattern composed of cuts C51a to C51e having a connection point C51x as a base end, and a part of a windmill-like cut pattern composed of cuts C52a to C52e based on a connection point C52x. It was. Similarly, a part of the windmill-like cut pattern with the connection point C53x as the base, a windmill-like cut pattern with the connection point C54x as the base, and a windmill-like cut with the connection point C55x as the base. Part of the pattern is shown.

In the windmill-like cut pattern composed of cuts C51a to C51e with the connection point C51x as the base end, the angle formed by the cut C51a and the cut C51b is 75 °, and the angle formed by the cut C51b and the cut C51c is 60 °. The angle formed by the cuts C51c and C51d, the angle formed by the cuts C51d and C51e, and the angle formed by the cuts C51e and C51a are each 75 °.
Further, the ends of the cuts C51a and C51d are bent at an angle of 90 ° counterclockwise, and the ends of the cuts C51b, C51c and C51e are bent at an angle of 60 ° counterclockwise. The windmill-like cut pattern having the other connection point as the base end is a pattern obtained by rotating the windmill-like cut pattern having the connection point C51x as the base end.

  As shown in FIG. 11, each windmill-shaped cut pattern is arranged such that one cut in each windmill-shaped cut pattern is inserted between a pair of cuts in another windmill-shaped cut pattern. . For example, the notch C51d is inserted between the notch 52b and the notch 52c of the notch pattern having the base of the connection point C52x.

  And the part enclosed by the front-end | tip bent of the notch in each windmill-like notch pattern is the branch part P of this embodiment. FIG. 11 shows a branching part P50, branching parts P51 to P54 surrounding the branching part P50, and a branching part P55 and a branching part P56 surrounding the branching part P54 together with the branching part P50.

The branch part P of the present embodiment is two-dimensional in such a relationship that one branch part P is surrounded by the other four branch parts P, and each of the four branch parts P is surrounded by the three branch parts P. Are arranged.
Note that the branch portion P of the present embodiment may also be regarded as a circular branch portion P (not shown) centered on the illustrated dotted branch portion P.

The branch part P50 and the branch part P51 are connected by a detour R51 formed by a cut C. A detour R51 is provided between the cuts C52c and C51d, between the cuts C51d and C52b, and between the cuts C52b and C51e.
The straight path between the branch part P50 and the branch part P51 is cut by a cut C51d and a cut C52b. Therefore, the shortest path S51 passing through the detour R51 is a path passing through the leading ends 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 A shortest path S54 is formed via the detour R54 between the branch part P54.
Further, a shortest path S55 that passes through the detour R55 between the branch part P54 and the branch part P55, and a shortest path S56 that passes through the detour R56 between the branch part P54 and the branch part P56 are formed. It should be noted that the shortest distance is different between the branch part P54 and the branch part P55, and the linear distance is also different from that of the other branch parts described above.

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

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

[Extension Sheet of Sixth Embodiment]
FIG. 12 shows an extension sheet 6 according to the sixth embodiment of the present invention. The stretch sheet 6 has a plurality of cuts C formed in a flat substrate 6a. In addition, a plurality of detours R and branching portions P that are two-dimensionally arranged are formed by the cuts C. Moreover, the peripheral part of the base material 6a is made into the frame part F, and the notch C is formed inside the said frame part. In addition, you may change 6th Embodiment to the aspect without the frame part F. FIG.

FIG. 13 is a partially enlarged view of the stretchable sheet 6. Based on FIG. 13, the notch C and the detour R and the branch part P formed by the notch C in the sixth embodiment will be described.
In the present embodiment, a plurality of cuts C in which both end sides of the reverse Z extend in an arc shape are formed.
As shown in FIG. 13, the four cuts C61 to C64 are formed by changing the angle by 90 ° so that one end side extending in a circular arc shape is spiral. In addition, cuts C65 to C68 intersecting with the centers of the cuts C61 to C64 are formed.

  The cut C65 intersects the cut C61 at an angle of 90 ° at the connection point C61x. The cut C66 intersects the cut C62 at an angle of 90 ° at the connection point C62x. The cut C67 intersects the cut C63 at an angle of 90 ° at the continuous point C63x. The cut C68 intersects the cut C64 at an angle of 90 ° at the continuous point C64x.

And the inner side where the one end side extended to each circular arc shape of the four notches C was combined in the spiral form becomes the branch part P of this embodiment. FIG. 13 shows a branch part P60, branch parts P61 to P64 formed on the top, bottom, left and right of the branch part P60, and branch parts P65 to P68 formed in four diagonal directions of the branch part P60.
The branch part P of the present embodiment is two-dimensionally arranged so as to be located at the intersection of the vertical and horizontal lattices. Note that the branch portion P of the present embodiment may also be regarded as a circular branch portion P (not shown) centered on the illustrated dotted branch portion P.

The branch portion P60 and the branch portion P61 are connected by a detour R61 formed by a cut C. The detour R61 is between the cuts C64 and C61, between the cuts C64 and C65, and between the cuts C68 and C65.
The straight path between the branch part P60 and the branch part P61 is cut by the cuts C63, C64, C65 and other cuts that form a spiral around the branch part P61. Therefore, the shortest path S61 passing through the detour R61 is a path passing through the path along each of the cuts C64 and C65 and the tangent line to both of them.

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

The detour R61 and the detour R62 can be separated by being cut by a cut C61. The detour R62 and the detour R63 can be separated by being cut by a cut C62. The detour R63 and the detour R64 can be separated by being cut by a cut C63. The detour R64 and the detour R61 can be separated by being cut by a cut C64. Similarly, the other adjacent detours R can also be separated by being cut by a cut C.
There are four branch parts P61 to P64 that are directly connected to the branch part P60 by a detour, and the condition α is satisfied. The other branch part P in FIG. 13 also satisfies the condition α.

When these branch parts are connected by a detour that directly connects the two branches, a quadrangular ring can be formed. Specifically, a ring composed of the branch part P60, the branch part P61, the branch part P66, and the branch part P62 can be formed. Moreover, the ring which consists of the branch part P60, the branch part P62, the branch part P67, and the branch part P63 can be formed. The two rings are overlapped and connected between the branch part P60 and the branch part P62.
Therefore, the stretch sheet of this embodiment can function as a stretchable net.

[Extension Sheet of 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 between the branched portions P (equal to the shortest distance / linear distance if the thickness of the base material is ignored) are mixed in one stretch sheet.
In FIG. 14, cuts C71a to C71c that cut the straight path between the branch part P71 and the branch part P72 are longer than the cuts C72a to C72c that cut the straight path between the branch part P72 and the branch part P73, respectively. Further, the cuts C73a to C73c for cutting the straight path between the branch part P73 and the branch part P74 are shorter than the cuts C72a to C72c, respectively.

Therefore, the shortest paths S71a and S71b that pass through the detour R between the branch part P71 and the branch part P72 are longer than the shortest paths S72a and S72b that pass through the detour R between the branch part P72 and the branch part P73. Further, the shortest paths S73a and S73b passing through the detour R between the branch part P73 and the branch part P73 are the shortest.
As a result, the maximum elongation is the largest between the branch part P71 and the branch part P72, and the smallest between the branch part P73 and the branch part P74.
Thus, even if it is a similar notch pattern, an elongation rate can be adjusted by adjusting the length.
Even when the maximum elongation between the branch portions P in one stretched sheet is uniform, the elongation can be adjusted by adjusting the length of the cut.

[Extension Sheet of Eighth Embodiment]
FIG. 15 is a partially enlarged view of the stretchable sheet according to the eighth embodiment of the present invention. In the present embodiment, a part of the cut is elliptical.
As shown in FIG. 15, a cut C81a and a cut C81b that intersect at an angle of 90 ° are formed. A pair of short cuts C81c and C81d are connected to both ends of the cuts C81a and C81b, respectively. In addition, an elliptical cut C81e is provided between the intersections of the cuts C81a and C81b.
A branch portion P is formed in a quadrangular region surrounded by the four pairs of cuts C81c and C81d.

As shown in FIG. 15, the linear path between the branch part P81a and the branch part P81b is cut by a cut C81e.
The shortest path S81a and the shortest path S81b that pass through the detour R between the branch part P81a and the branch part P81b pass through the tangent line of the cut C81e that passes through the respective ends of the cut C81c and the cut C81d and the periphery of the cut C81e. It is a route.

[Extension Sheet of 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 cut is formed in the branch portion P.
As shown in FIG. 16, a cut C82a and a cut C82b that intersect at an angle of 90 ° are formed. A pair of short cuts C82c and C82d are connected to both ends of the cuts C82a and C82b, respectively. Further, a cut C82e is provided between the intersections of the cut C82a and the cut C82b. A circular cut C82f is formed in a quadrangular region surrounded by the four pairs of cuts C82c and C82d.

The branch part P of the present embodiment may be regarded as a circular region along the periphery of the cut C82f like the branch parts P82a and P82b, or four pairs of cuts like the branch part P82c and the branch part P82d. It may be considered as a quadrangular region surrounded by C82c and cut C82d.
The shortest paths S82a and S82b in the former case start from the circular area, and the shortest paths S82c and S82d in the latter case start from the square area.

[Extension Sheet of Tenth Embodiment]
FIG. 17 is a partially enlarged view of the stretchable sheet according to the tenth embodiment of the present invention. In the present embodiment, a cross cut 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. A pair of bent short cuts C83c and C83d are connected to both ends of each of the cuts C83a and C83b. Further, a cut C83e is provided between the intersections of the cut C83a and the cut C83b. A cut C83f is formed in a direction parallel to the cut C83a and a cut C83g is formed in a direction parallel to the cut C83b in a substantially cross-shaped region surrounded by the four pairs of cuts C82c and C82d. The cut C83f and the cut C83g intersect each other.

The branch part P of this embodiment can be regarded as a substantially cross-shaped area surrounded by four pairs of cuts C83c and C83d, like the branch parts P83a and P83b. The shortest paths S83a and S83b start from the substantially cross-shaped region.
In the present embodiment, due to the presence of the cut formed in the branch part P, the branch part P itself can also expand.

<Application of stretch sheet>
Hereinafter, usage modes of the stretch sheet of the present invention will be described. In the following description, the aspect using the stretch sheet of the first embodiment has been described. However, instead of the stretch sheet of the first embodiment, the stretch sheets of other embodiments and other stretches according to the present invention are described. Of course, it can be changed to a sheet.

  Moreover, although the following description demonstrated the aspect which uses only 1 sheet | seat of an expansion | extension sheet | seat, you may overlap and use a plurality of expansion | extension sheet | seats, respectively. The number of sheets in that case is not particularly limited, but can be 2 to 20 sheets, for example. In the case of overlapping, it is preferable that the patterns of the cuts are shifted so that they do not completely overlap each other because they are entangled with each other during use and the shape is easily fixed. When the sheets are stacked, 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 encloses a rectangular parallelepiped cavity with six rectangular substrates, and one of the substrates is constituted by the stretch sheet 1A of the first embodiment.
In the stretch sheet 1A, the cut C is opened by pressing. For example, when the central portion is pressed from the outside, as shown in FIG. 19, the width of the cut Ca close to the frame portion F does not open very much, but the width increases greatly toward the cut Cb and the cut Cc. As a result, as shown in FIG. 20, the stretch sheet 1A bends toward the inside of the original cavity. When the pressure is further increased, the width of the cut C is further opened as shown in FIG.

FIG. 22 is an image view showing a state in which the grape 11 is stored in the storage container 10. When an uneven packaging object such as grapes is placed on the stretch sheet 1A, the width of the cut C opens according to the unevenness, and the convex portion bends toward the inside of the original cavity.
Therefore, according to the storage container 10 of the present embodiment, various forms of packaging objects can be stored with excellent pressure dispersibility. Further, since the stretch sheet 1A is composed of a single substrate, it can be easily handled during storage or disposal.
What is necessary is just to select the base material which comprises the expansion | extension sheet | seat 1A used for the storage container 10 suitably according to the intended purpose of a packaging target object. For example, when importance is attached to reducing the load on the packaging object as much as possible, a base material having flexibility and cushioning properties can be selected. Further, when the packaging object is a heavy object, the base material can be selected with priority given to providing sufficient strength.

After the packaging object is placed and stored on the surface of the storage container 10 made of the stretch sheet 1A, an appropriate lid material may be covered from the upper side.
A base material having an appropriate strength can be used for the stretch sheet 1 </ b> A constituting one surface of the storage container 10 according to the packaging object.
Note that the stretch sheet 1A in FIG. 22 is the reverse of FIG.
The storage container of this invention is not limited to the aspect surrounding a rectangular parallelepiped cavity. For example, the aspect surrounding a cylindrical cavity may be sufficient. In that case, a circular substrate that defines one bottom surface may be formed of the stretch sheet of the present invention.

[Packaging materials]
FIG. 23 shows a packaging material 20 using the stretch sheet of the present invention. The packaging material 20 is comprised from the expansion | extension sheet | seat 1B of 1st 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. 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, without using a separate fixing means such as cello tape (registered trademark) or glue, the stored items can be fixed in a packaged state as shown in FIG.
What is necessary is just to select the base material which comprises the expansion | extension sheet | seat 1B used for the packaging material 20 according to the intended purpose of a packaging target object etc. suitably. For example, when importance is attached to reducing the load on the packaging object as much as possible, a base material having flexibility and cushioning properties can be selected. Further, when emphasizing the anchor effect, the base material can be selected with priority given to the strength that can easily exert the anchor effect.

[Scouring]
FIG. 24 shows a scrubber 30 using the stretch sheet of the present invention. The scrubber 30 is composed of the stretch sheet 1A of the first embodiment. When the stretching sheet 1A is rolled so that the peripheral edge is gathered in one place, the cut surface of the cut is exposed to the front surface and can be used as a scourer.
What is necessary is just to select the base material which comprises the expansion | extension sheet | seat 1A used for the scrubber 30 suitably according to the material etc. of the washing | cleaning target object. For example, when importance is attached to not damaging the object to be cleaned, a soft base material can be selected. In addition, when it is desired to perform cleaning with a strong force, a rigid substrate can be selected. Further, the substrate may be selected with emphasis on water resistance, or the substrate may be selected with emphasis on water absorption.

[Storage pouch]
FIG. 25 is a storage pouch 40 using the stretch sheet of the present invention. The storage pouch 40 is configured by bending the center of the stretch sheet 1A of the first embodiment along the horizontal direction of FIG.
The side 40a in FIG. 25 is the bent side. On the sides 40b and 40c side, the overlapped frame portion F is bonded. The side of the side 40d is an opening that opens in an annular shape without bonding the frame portions F that are overlapped with each other.

When a stored item is inserted through the opening of the side 40d, the cut opens and the branch portion P extends in accordance with the shape and size of the stored item, so that the stored item can be stored.
What is necessary is just to select suitably the base material which comprises the expansion | extension sheet | seat 1A used for the storage pouch 40 according to a use purpose. For example, when importance is attached to the protection of stored items, a base material having flexibility and cushioning properties can be selected. Moreover, when emphasizing fashionability, the base material excellent in the designability can be selected.
A grip hand may be attached to the side 40d side. Alternatively, the side 40d side may be squeezed through rubber or a string to form a drawstring pouch.

[Other uses]
When a pattern is drawn on the stretched sheet of the present invention in a flat state, it can be used as a three-dimensional mosaic puzzle. That is, when the cuts on the stretched sheet on which the pattern is drawn are randomly opened, the cuts are intertwined in a complicated manner, and it is possible to enjoy the work of returning this to the original pattern.
Further, when a stretch sheet without a 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, ... Stretched sheet 1a, 1b, 2a, 3a, 4a, 5a, 6a, ... Base material C ... Cut P ... Branching part R ... Detour F ... Frame part N ... Ring 10 ... Storage container 20 ... Packaging material 30 ... Scourer 40 ... Storage pouch

Claims (4)

A stretch sheet in which a plurality of cuts are formed in a flat substrate,
By the incision, a plurality of detours and a plurality of branch portions arranged two-dimensionally 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 detour is longer than the linear distance between the first end and the second end. Has been
Between each detour and the adjacent detour, it is cut by the cut and can be separated,
The branch portion is a portion where the end portions of the two or more detours meet,
Branch plurality of branch portions, when we concluded with detour path connecting the branch portions meet the following conditions α directly, are arranged such networks are formed, which are connected directly by the detour The stretched sheets are characterized in that the portions are connected by two or more detours having the same shortest path length .
(Condition α)
There are three or more branch portions that are directly connected to the one branch portion by the bypass. Furthermore, it has a frame part,
The stretch sheet according to claim 1, wherein the plurality of detours and the entire branching portion are disposed inside the frame portion.   The stretch sheet according to claim 1 or 2, wherein the substrate is non-stretchable.   A storage container formed of a substrate surrounding a cavity, wherein a part of the substrate is the stretchable sheet according to any one of claims 1 to 3.