WO2021161910A1

WO2021161910A1 - Cushion material, package cushioning device, and method for manufacturing same

Info

Publication number: WO2021161910A1
Application number: PCT/JP2021/004292
Authority: WO
Inventors: 祐磨服部
Original assignee: 三菱電機株式会社
Priority date: 2020-02-10
Filing date: 2021-02-05
Publication date: 2021-08-19
Also published as: JP7204040B2; JPWO2021161910A1; CN115052818A

Abstract

This cushion material (40) is formed from a biodegradable sheet. In addition, in the cushion material (40), polygonal-shaped cushioning parts (100) are arranged in a zigzag shape, and polygonal-shaped open holes (1011) are formed in a region surrounded by the plurality of cushioning parts (100). In addition, the cushion material (40) is bent at three or more parallel lines (1016, 1017, 1018) of the respective cushioning parts (100) and forms a bellows structure that bends and extends in the load direction due to the bending of a boundary line (1019) between the adjacent cushioning parts (100).

Description

Cushioning material, packaging cushioning device and its manufacturing method

This disclosure relates to a cushioning material, a packaging cushioning device, and a method for manufacturing the same.

When packaging goods, cushioning materials made from plastic are generally used. However, plastic is difficult to decompose. In addition, when plastics are incinerated, harmful substances are generated.

In order to deal with such environmental problems, cushioning materials made from paper materials with a small environmental load have been developed.

For example, Patent Document 1 discloses a structure with a fold line formed by forming a diamond-shaped panel formed by providing a mountain fold line and a valley fold line on a sheet-like material into a cylindrical shape.

International Publication No. 2001/081821

The cylindrical structure with a fold line of Patent Document 1 absorbs the impact energy by converting the impact energy into the energy of bending the fold line when an impact is applied from the height direction. The cushioning performance improves in proportion to the total length of the fold line. However, since the number and position of the fold lines are geometrically limited, the places where the fold lines can be provided are limited by the peripheral length of the cylindrical structure. Therefore, there is a limit to the cushioning performance per volume.

The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a cushioning material, a packaging cushioning device, and a method for manufacturing the same, which are formed of a paper member and have high cushioning performance.

In order to achieve the above object, the cushioning material according to the present disclosure is formed from a biodegradable sheet. Further, in the cushioning material, polygonal cushioning portions are arranged in a staggered pattern, and polygonal opening holes are formed in a region surrounded by the plurality of the cushioning portions. Further, the cushioning material bends at least three parallel lines of each of the cushioning portions, and the boundary line between the adjacent cushioning portions bends to form a bellows structure that bends and stretches in the load direction.

According to the above configuration, since the length of the bent portion can be secured, it is possible to provide a cushioning material having high cushioning performance, a packaging cushioning device, and a method for manufacturing the same by using a biodegradable sheet member. ..

Enlarged view of the cushioning material according to the first embodiment Partially enlarged development view of the cushioning material according to the first embodiment Enlarged view of the cushioning portion of the cushioning material according to the first embodiment Schematic perspective view of the cushioning material according to the first embodiment FIG. 1B and FIG. 1C are enlarged cross-sectional views taken along the line II-II'. Part of the development view of the paper sheet according to the first embodiment Partially enlarged view of the rectangular area surrounded by the broken line in FIG. 3A Comparative diagram for explaining the cushioning performance of the cushioning material according to the first embodiment. Partially enlarged view of the rectangular area surrounded by the broken line in FIG. 4A Development view of the paper sheet according to the first embodiment Schematic perspective view showing the packaging shock absorber according to the usage form 1. Schematic perspective view showing a usage pattern of the packaging shock absorber according to FIG. 6A. Schematic perspective view showing the packaging shock absorber according to the usage form 2. Schematic perspective view showing a usage pattern of the packaging shock absorber according to FIG. 7A. A side view showing the structure of the packaging shock absorber according to the second embodiment. Schematic side view showing an example of the usage embodiment of the packaging shock absorber according to the second embodiment. Schematic perspective view showing another configuration example of the cushioning material according to the present disclosure. Enlarged view of cushioning material of other configuration examples according to the present disclosure Enlarged view of cushioning material of other configuration examples according to the present disclosure Enlarged view of cushioning material of other configuration examples according to the present disclosure

Hereinafter, the cushioning material, the packaging cushioning device, and the manufacturing method thereof according to the present disclosure will be described with reference to the drawings.

In order to facilitate understanding, in the buffer material according to the embodiment, the bending / stretching direction of the buffer portion 100 described later is the Y-axis direction, the direction perpendicular to the bending / stretching direction of the buffer portion 100 is the X-axis direction, and Y. Set XYZ Cartesian coordinates with the direction perpendicular to the axial direction and the X-axis direction as the Z-axis direction, and refer to them as appropriate. The load has a Y-axis component.

(Embodiment 1)
The cushioning material 10 and a method for producing the cushioning material 10 according to the first embodiment will be described.

As shown in FIG. 1D, the cushioning material 10 has a structure in which a paper sheet (hereinafter, paper sheet) 40, which is a biodegradable sheet, is roughly molded into a tubular shape and joined at a joint portion 43.

As shown enlarged in FIG. 1A, the paper sheet 40 is divided into a plurality of areas (hereinafter referred to as panels) by being valley-folded or mountain-folded by a plurality of fold lines. When the paper sheet 40 is valley-folded or mountain-folded along a plurality of folding lines, the cushioning material 10 can be bent and stretched in a direction parallel to the axial direction of the cylinder, that is, in the Y-axis direction. The entire paper sheet 40 is made of a sheet-like paper member such as corrugated cardboard or paperboard.

As developed and shown in FIG. 1B, the paper sheet 40 is mountain-folded by the mountain fold line 1019 and is divided into a plurality of cushioning portions 100 each having a concave hexagonal shape. A concave decagon is defined as a decagon in which one or more of the internal angles is represented by a concave angle larger than 180 °.

The shock absorbers 100 are arranged in a staggered pattern shifted by 1/2 pitch in the Y-axis direction and the X-axis direction. Further, a convex hexagonal opening hole 1011 is formed in the region surrounded by the four connected buffer portions 100. Of the hexagons, those having a concave angle larger than 180 ° at the internal angle are defined as concave hexagons, those having a right angle at the internal angle are defined as straight hexagons, and those having neither concave angle nor right angle at the internal angle are defined as convex hexagons. do.
Further, in FIG. 1B and FIGS. 11 and 12 described later, a hexagonal opening hole 1011 is hatched, although it is not a cross section, in order to facilitate the distinction of the regions.

As shown enlarged in FIG. 1C, each buffer portion 100 has a concave hexagonal shape having two concave angles. The symbols A1 to A3, B1, B2, C1 to C3, D1 and D2 are attached to each vertex of the concave decagon. At this time, the internal angles of the vertices A3 and C3 at the center in the Y-axis direction are a concave angle θ4 larger than 180 °, and the other internal angles are convex angles smaller than 180 °.

The buffer portion 100 is mountain-folded by a mountain fold line 1017 extending in the X-axis direction connecting diagonal A3 and C3 located in the center in the Y-axis direction, and has two portions having a convex hexagonal shape (hereinafter, convex). Hexagonal portion) 101. The convex hexagonal portion on the + Y side of the mountain fold line 1017 is represented by the reference numeral 101A, the convex hexagonal portion on the −Y side of the mountain fold line 1017 is represented by the reference numeral 101B, and the reference numeral 101 is added when the two are not distinguished. .. The convex

hexagonal portions

101A and 101B are line-symmetric with respect to a diagonal line, that is, a mountain fold line 1017 as a first line perpendicular to the load direction.
The buffer 100 is also line-symmetric with respect to a virtual line extending in the center of the X-axis direction in the Y-axis direction.

Further, the convex hexagonal portion 101A on the + Y side is valley-folded by the valley fold line 1016 as the second side extending in the X-axis direction connecting the diagonals A1 and C1, and is trapezoidal as the second panel. Panels (hereinafter referred to as trapezoidal panels) are divided into 1012 and 1013. The third side or the fourth side represented by A1A3 or C1C3 forming the trapezoidal panel 1013 connects one end of the first side and one end of the second side. Further, the sixth side of FIG. 1C connects one end of the second side and one end of the fifth side. Further, the seventh side of FIG. 1C connects the other end of the second side and the other end of the fifth side. Here, the seventh side serves as a first buffer portion and a third buffer portion. Further, the two third sides serve as a second buffer. Then, the two fourth sides serve as a fourth buffer.

Similarly, the convex hexagonal portion 101B on the −Y side is valley-folded by the valley fold line 1018 as the second side extending in the X-axis direction connecting the diagonals A2 and C2, and the

trapezoidal panels

1014 and 1015. It is divided into. The third side or the fourth side represented by A2A3 or C2C3 forming the trapezoidal panel 1015 connects one end of the first side and one end of the second side. Further, the sixth side of FIG. 1C connects one end of the second side and one end of the fifth side. Further, the seventh side of FIG. 1C connects the other end of the second side and the other end of the fifth side.
The first side, the second side, and the third side extend in the X-axis direction perpendicular to the Y-axis direction, which is the load direction, and are parallel to each other.
Since the valley fold line 1016, the mountain fold line 1017, the valley fold line 1018, and the mountain fold line 1019 function as bending portions in which the portions bend, they are hereinafter referred to as bending

portions

1016, 1017, 1018, and 1019, respectively. Sometimes.

As described above, the cushioning portion 100 is represented by the

valley fold lines

1016 and 1018 formed in the two convex hexagonal portions 101, respectively, and the first line segment A3C3 for partitioning the two convex hexagonal shaped portions 101. It has a total of seven bent portions, that is, a mountain fold line 1017 as a side and four mountain fold lines 1019 represented by a line segment A1B1, a line segment B2C1, a line segment C2D2, and a line segment A2D1 as diagonal sides.

Here, the hypotenuse represents an outer periphery diagonal to the Y-axis and the Z-axis, excluding the sides A1-A3 and A3-A2, and C1-C3 and C3-C2, which define the two concave angles of the buffer portion 100. ..

By arranging the cushioning portions 100 having such a bent structure in a staggered pattern, the paper sheet 40 and the cushioning material 10 formed by molding the paper sheet 40 have a bellows structure that bends and stretches in the Y direction.

The basic structure formed by the four cushioning portions 100 surrounding the convex hexagonal opening hole 1011 is the minimum unit of the cushioning structure, and the paper sheet 40 has a plurality of basic structures of the minimum unit.

The cushioning material 10 is formed by molding the paper sheet 40 into a tubular shape with the load direction as the central axis. Therefore, as shown in FIG. 1A, the cushioning material 10 also has a plurality of cushioning portions 100 and a plurality of convex hexagonal opening holes 1011 surrounded by them on the side surface, and the cushioning portion 100 on the side surface. Are arranged in a staggered pattern.

In the above description, an example of folding each fold line in a mountain fold or a valley fold is shown, but the mountain fold or the valley fold is relative to the position of the viewpoint with respect to the paper sheet 40 and is viewed from the back surface. It is the opposite of folding. Further, for the parallel and right-angled portions, an error of about ± 15 ° can be tolerated as long as the bending / stretching function of the cushioning material 10 is maintained.

Next, the action of the cushioning material 10 will be described.

Focusing on one buffer 100, the buffer 100 has a bent structure shown in FIG. Note that FIG. 2 corresponds to the II-II'line cross sections of FIGS. 1B and 1C.

Here, the angle ∠ABC formed by the trapezoidal panel 1012 and the trapezoidal panel 1013 at the valley fold line 1016 is θ1, the angle ∠BCD formed by the trapezoidal panel 1013 and the trapezoidal panel 1014 at the mountain fold line 1017 is θ2, and the trapezoidal panel 1014 and the trapezoid. Let θ3 be the angle ∠CDE formed by the panel 1015 and the valley fold line 1018.

In this case, θ1, θ2, and θ3 each take a value in the range of 0 ° or more and less than 180 °.

When the object to be packaged is placed on the upper part of the cushioning material 10, it is represented by the upper part of the trapezoidal panel 1012, that is, the second side and the side B1B2 of FIG. 1C which is parallel to the second side and shorter than the second side. A force is applied in the −Y axis direction from the fifth side to be formed. Then, the valley fold line 1016 bends and the angle θ1 becomes small, the mountain fold line 1017 bends and the angle θ2 becomes small, the valley fold line 1018 bends, and θ3 becomes small.

Further, when the

trapezoidal panels

1012 and 1013 are bent at the valley fold line 1016 as the first panel, the angle θ4 shown in FIG. 1C becomes smaller, and the mountain fold line 1019 corresponding to the boundary line with the adjacent buffer portion 100 is further formed. Bends.

In this way, the impact energy applied to the upper part of the cushioning material 10 is applied to the valley fold line 1016, the mountain fold line 1017, the valley fold line 1018 of each cushioning portion 100, and the mountain fold line 1019 between the adjacent cushioning portions 100. It is converted into elastic energy to bend. A part of it is consumed as plastic deformation energy for deforming the

trapezoidal panels

1012, 1013, 1014, and 1015. In this way, the impact is mitigated. The lower part of the trapezoidal panel 1015, that is, the fifth side is represented by the second side and the side D1D2 in FIG. 1C which is parallel to the second side and shorter than the second side.

Next, the magnitude of the cushioning capacity of the cushioning material 10 will be described using a comparative example.

FIG. 3A shows a part of the developed view of the paper sheet 40. Further, FIG. 3B shows a partially enlarged view of the rectangular region 110 surrounded by the broken line in FIG. 3A. Here, for comparison, as shown in FIG. 3B, attention is paid to one buffer portion 100, and a virtual rhombus formed by extending each mountain fold line 1019 is assumed. Let the four vertices of the formed virtual rhombus be ABCD.

The diagonal line in the load direction of this rhombus ABCD, that is, the line segment connecting the apex BD is extended and shown as an auxiliary line by a alternate long and short dash line. Further, the intersection of the diagonal lines of the diamond ABCD is O, and the intersections of the diagonal lines of the line segments A1C1 and A2C2 and the diamond ABCD are O ″ and O ″, respectively. Further, the intersection of the line segment AB of the outer shape of the diamond and the apex of the hexagonal opening hole 1011 provided around the apex A is set as A1, and the line segment AD and the hexagonal opening hole provided around the apex A are set as A1. Let A2 be the intersection of the apex of 1011 and A3, and let A3 be the intersection of the line segment AC and the apex of the hexagonal opening hole 1011 provided around the apex A. Further, the intersection of the line segment AB and the apex of the hexagonal opening hole 1011 provided around the apex B is set as B1, and the intersection of the line segment BC and the apex of the hexagonal opening hole 1011 provided around the apex B is defined as B1. Let B2 be the intersection of. Hereinafter, the intersections C1 to C3 are set near the vertices C in the same manner as when the intersections A1 to A3 are set. Further, the intersections D1 and D2 are set near the vertices D in the same manner as when the intersections B1 and B2 are set.

Next, let the length of the line segment AC be a _1, and let the lengths of the line segments AB, BC, CD, and DA be a ₂ . Further, it is assumed that the line segment AA3 = the line segment CC3 = x. Further, ∠AA1A3 = ∠AA2A3 = ∠CC1C3 = ∠CC2C3 = 90 °.

In the paper sheet 40, the total length L'of the bent portion exhibiting the cushioning performance is the line segment A1B1, the line segment B2C1, the line segment C2D2, the line segment D1A2, the line segment A1C1, the line segment A3C3, which constitute one buffering portion 100. It is represented by the product of the sum of the lengths of the line segments A2C2 and the number N of the diamond-shaped ABCDs.

Here, the length of each convex fold 1019 corresponding to the concave decagon outline is expressed by _{A1B1 = B2C1 = C2D2 = D1A2 =} (a 2 2 -a 1 x) / a 2 = a 2 ' .. Further, the lengths of the first and third diagonals of the concave decagon are represented by A1C1 = A2C2 = (2a ₁ a ₂ ^2- a ₁ ² x) / 2a ₂ ² = a'.

The second length of a diagonal line of the concave decagon is represented by _{_{A3C3 = a 1 -2x = a 1}} '.

Therefore, the total length L'of the bent portion of the buffer portion 100 is represented by L'= Na ₁ '+ 2 (N + 1) (a'+ a ₂ ').

On the other hand, FIG. 4A shows, as a comparative example, a part of a developed view of the paper sheet when the hexagonal opening hole 1011 is not defined for the paper sheet 40. The paper sheet shown in this developed view does not have a hexagonal opening hole 1011 unlike the first embodiment. However, the size of the diamond is the same as that of the diamond ABCD shown in FIGS. 3A and 3B.

Further, FIG. 4B shows an enlarged view of a rectangular area 120 surrounded by a broken line, which has the same size as the rectangular area 110 of FIG. 3A.

As shown in FIG. 4B, the rhombus constituting the buffer portion of the comparative example is formed by the sides connecting the four vertices ABCD. The line segment connecting the vertices BD of this rhombus ABCD is extended and shown as an auxiliary line by a alternate long and short dash line. Further, let O be the intersection of the diagonal line of the diamond ABCD, that is, the line segment AC and the line segment BD.

In FIG. 4B, the total length L of the bent portion exhibiting the cushioning performance is the sum of the lengths of the diamond-shaped line segment AB, line segment BC, line segment CD, line segment DA, and line segment AC constituting one buffering portion. , It is represented by the product of the number N of rhombuses, and L = Na ₁ + 2 (N + 1) a ₂ .

By providing the hexagonal opening hole 1011 in the diamond ABCD as in the paper sheet 40 of the present disclosure, the length of each line segment of the diamond ABCD and the length of the line segment AC are shortened. However, as shown in FIG. 3B, the line segments A1C1 and A2C2 can be newly defined. Here, in order to provide a cushioning material having high cushioning performance, the total length of the bent portion having the cushioning performance shown in FIG. 3 is larger than the total length L of the bent portion having the cushioning performance of the comparative example shown in FIG. It is necessary that L'is long and L'> L. That is, L'-L> 0 must hold. Therefore, for x, the hexagonal opening hole 1011 opens only when x << {2 (N + 1) a ₁ a ₂ ² } / {(N + 1) a ₁ ² + 2 (N + 1) a ₁ a ₂ + 2Na ₂ ^{2} is satisfied.} The total length L'of the bent portion is longer than that in the case where it is not provided. This provides a large buffering capacity. Incidentally, if this condition is _satisfied, a _{1, a} 2, x are each arbitrarily set.

Next, a method of manufacturing the cushioning material 10 according to the first embodiment will be described.

FIG. 5 shows a developed view of the paper sheet 40.
As shown in FIG. 5, the paper sheet 40 is provided with

joint margins

41 and 42 as connecting portions of the paper sheet 40 at both end portions in the X-axis direction.

The

splicing margins

41 and 42 are provided in cushioning portions 100 at both end portions of the paper sheet 40 in the X-axis direction, and the splicing margin portions 41 provided at one end are spliced at the other end. It faces the margin 42.

Next, the

mountain fold lines

1017 and 1019 and the

valley fold lines

1016 and 1018 are formed.

Next, a hexagonal opening hole 1011 is formed.

After that, the

mountain fold lines

1017 and 1019 are mountain-folded, and the

valley fold lines

1016 and 1018 are valley-folded.
Next, the paper sheet 40 is rolled and molded into a tubular shape with reference to the axis extending in the load direction indicated by the alternate long and short dash line. After that, the joint margin 41 and the joint margin 42 facing each other are connected. An adhesive, a stapler for corrugated cardboard, a rivet, or the like can be used to connect the

joint portions

41 and 42.

As a result, as shown in FIG. 1D, it is tubular as a whole, and as shown in an enlarged view in FIG. 1A, it contains two convex hexagonal portions having a convex hexagonal shape and has two concave angles as internal angles. The hexagonal cushioning portions 100 are arranged adjacent to each other in a staggered pattern, and a cushioning material 10 having an opening hole formed in a convex hexagonal region surrounded by four cushioning portions 100 is formed.

Note that you may fold it without forming a fold line in advance. Further, the paper sheet 40 may be made into a tubular shape and then folded. The folding may be performed by press working.

Next, a plurality of forms in which the cushioning material 10 is used will be described.

(Usage form 1)
First, as illustrated in FIG. 6A, a large number of cushioning materials 10 of the same size are prepared and arranged to form a packaging cushioning device 70. An adhesive sheet may be used for the arrangement.
An arbitrary cushioning force can be set by adjusting the material of the paper sheet 40 used for forming the cushioning material 10, the size of the cushioning material 10, the arrangement density of the cushioning material 10, and the like.

Next, as shown in FIG. 6B, the formed packaging cushioning device 70 is arranged on the inner bottom surface of the packaging box 50. In FIG. 6B, the packaging box 50 is seen through, and the packaging cushioning device 70 is shown with hatching.

Next, the packaging object 60 is placed on the packaging cushioning device 70.
In this way, when the packaging cushioning device 70 is installed under the packaging object 60, the packaging cushioning device 70 shrinks when a vertically downward acceleration acts on the packaging object 60 due to a drop or collision of the packaging box 50. , Accumulates kinetic energy in the form of elastic energy. As a result, the impact applied to the packaging object 60 is alleviated.

(Usage form 2)
When a sufficient cushioning force cannot be obtained only by the cushioning material 10 of one layer or one stage, it is also possible to secure the cushioning power by stacking a plurality of stages or a plurality of layers of the cushioning material 10.
For example, as illustrated in FIG. 7A, a large number of cushioning materials 10 are prepared and arranged as shown in FIG. 7B to form the packaging cushioning device 70 in the same manner as in the first use. The packaging cushioning device 70 is stacked in three stages to form the packaging cushioning device 80.

Next, the packaging shock absorber 70 is placed on the inner bottom surface of the packaging box 50. In FIG. 7B, the packaging box 50 is seen through, and the arranged packaging cushioning device 70 and the packaging cushioning device 80 are shown with hatching.

According to such a packing configuration, the cushioning material 10 stacked in a plurality of stages can obtain a larger cushioning force than in the case of one stage. It is effective when the packaging may be subjected to a larger impact than the usage mode 1 or when the packaging object 60, which is vulnerable to impact, is protected. Further, it can be used to fill an unnecessary space generated when the object to be packaged 60 is stored inside the storage body.

In this way, the number of spring elements can be increased by stacking the cushioning materials 10 having the same shape on the cushioning materials 10. Therefore, when the cushioning performance is insufficient due to the small number of cushioning materials 10, the cushioning performance can be easily controlled by using the package cushioning device 70. Further, by applying the packaging cushioning device 70 to the unnecessary space generated when the object to be packaged is stored inside the storage body, the unnecessary space can be filled.

(Embodiment 2)
In the first embodiment, an example in which the paper sheet 40 is molded into a tubular shape and used as the cushioning material 10 has been described, but the paper sheet 40 is not molded into a tubular shape and is used as a cushioning material as it is in a flat plate shape. It is also possible.
In this case, for example, as shown in FIG. 8, the plurality of paper sheets 40 are laminated via the spacer 44 at intervals such that the bent portion can be bent and the bellows structure can be maintained. Each paper sheet 40 alone functions as a cushioning material 11, and the whole including the spacer 44 functions as a packaging cushioning device 12. Each paper sheet 40 is arranged parallel to the XY planes.

An example of using such a packaging shock absorber 12 will be described with reference to FIG. In this example, the packaging shock absorber 90 has an L-shaped shape when viewed from the front, and is formed of the

shock absorber units

90a and 90b. The

shock absorbers

90a and 90b are formed from the packaging shock absorber 12 shown in FIG. 8, respectively.

An adhesive, a stapler for corrugated cardboard, a rivet, or the like may be used to fix the laminated cushioning materials 11 to each other via the spacer 44.

In this example, the

buffer units

90a and 90b are connected in order to form the packaging shock absorber 90. At the time of this joining, the buffer unit 90a is set so that the Y-axis direction of the paper sheet 40 coincides with the downward load direction from the packaging object 60. On the other hand, since the shock absorber unit 90b cushions the impact of the packaging object 60 in the horizontal direction, the orientation of the paper sheet 40 is adjusted so that the Y-axis direction is the horizontal direction.

The package cushioning device 90 formed in this way is placed on the packaging box 50, and the packaging object 60 is further placed on the packaging box 50.

According to such a configuration, the packaging shock absorber 90 makes it possible for the shock absorbing unit 90a to buffer the impact downward in the drawing and the shock absorbing unit 90b to buffer the impact in the horizontal direction of the drawing.
As in the first embodiment, the packaging shock absorbers 12 may be stacked and used.
It is also possible to form the packaging cushioning device 90 using the cushioning material 10 of the first embodiment.

Although the cushioning material has been described above by taking the first and second embodiments as an example, the cushioning material is not limited to the first or second embodiment.

For example, in the first embodiment, the paper sheet 40 is formed into a cylindrical shape, but for example, as shown in FIG. 10, it is also possible to form the cushioning material 11 in a roll shape. In this case, it is desirable that the paper sheet 40 is rolled while ensuring an interval through a spacer (not shown).

Further, the shape of the shock absorber 100 is not limited to the concave decagon, and the shape of the opening hole 1011 is not limited to the hexagon.
A specific example will be described with reference to FIGS. 11A and 11B. In addition, in FIGS. 11A and 11A, in order to facilitate the distinction between the paper sheet portion and the opening hole, hatching is added to the opening hole portion.
For example, as shown in FIG. 11A, the hexagonal opening hole 1011 is replaced with a quadrangular opening hole 1020, and the convex hexagonal portion 101A is replaced with a substantially trapezoidal straight hexagonal portion 102A. Instead of 101B, a substantially trapezoidal straight hexagonal portion 102B may be used. The straight hexagonal shape portion 102A and the straight hexagonal shape portion 102B are arranged line-symmetrically with respect to the first line 102C to form an octagonal cushioning portion 200 as a whole. By arranging the octagonal cushioning portions 200 in a staggered pattern, a quadrangular opening hole 1020 is formed. The first line 102C at the boundary between the straight hexagonal shape portion 102A and the straight hexagonal shape portion 102B extends in a direction substantially perpendicular to the load direction, and is, for example, mountain-folded. Further, the cushioning portion 200 is valley-folded by two second lines 102D connected to the side extending in the direction perpendicular to the load direction of the opening hole 1020.
In the arranged buffer portion 200, at least three parallel lines including the first line 102C and two diagonal second lines 102D and the boundary line between the adjacent buffer portions 200 are bent. It forms a bellows structure that bends and stretches in the load direction.

Further, for example, as shown in FIG. 11B, the hexagonal opening hole 1011 is replaced with the concave hexagonal opening hole 1021, the convex hexagonal shape portion 101A is replaced with the trapezoidal shape portion 103A, and the convex hexagonal shape portion 101B is used. Alternatively, the trapezoidal shape portion 103B may be used as the convex hexagonal shape buffer portion 300. The trapezoidal shape portion 103A and the trapezoidal shape portion 103B are arranged line-symmetrically to form a buffer portion 300 as a whole. By arranging the convex hexagonal cushioning portions 300 in a staggered manner, the concave hexagonal opening hole 1021 is formed. The first line 103C at the boundary between the trapezoidal shape portion 103A and the trapezoidal shape portion 103B extends in a direction substantially perpendicular to the load direction, and is, for example, mountain-folded. Further, the cushioning portion 300 is valley-folded by two second lines 103D connected to the side extending in the direction perpendicular to the load direction of the opening hole 1021. In the arranged buffer portion 300, at least three parallel lines including the first line 103C corresponding to the diagonal line and the two second lines 103D and the boundary line between the adjacent buffer portions 300 are bent. To form a bellows structure that bends and stretches in the load direction.

In the above explanation, a shock absorber having a shape in which two polygons are arranged line-symmetrically is used. This disclosure is not limited to this. The paper sheet 40 may have an arbitrary structure in which polygonal cushioning portions are arranged in a staggered pattern and openings are formed between them. For example, as illustrated in FIG. 12, the buffer portion 400 may be an octagon in which convex

hexagonal portions

104A and 104B that are not line-symmetrical are arranged with respect to the first line 104C in the direction perpendicular to the load direction. .. The cushioning portions 400 may have a configuration in which they are arranged in a staggered pattern. In this example, the opening hole 1040 is hexagonal and is surrounded by the octagonal cushioning portion 400. In the example of FIG. 12, the paper sheet 40 forms a bellows structure in which the bending line 104C and the two bending lines 104D of the cushioning portion 400 and the boundary line between the adjacent cushioning portions 400 are bent and bent and stretched in the load direction. ..

Further, the cushioning portion 400 is not limited to the above-described configuration, and may have a configuration in which polygonal cushioning portions are arranged in a staggered pattern and opening holes are formed in a region surrounded by a plurality of buffering portions. Each buffering portion forms a bellows structure in which at least three lines substantially parallel to each other and a boundary line between adjacent cushioning portions are bent to bend and stretch in the load direction.
Further, the bending line of each cushioning portion is not limited to three, and may be three or more.

Further, for example, in order to increase the strength of the cushioning material used in the above form, the cushioning material may be surface-treated.

In the above form, the height of the cushioning material and the thickness of the member are not particularly specified, but can be arbitrarily set as long as the desired cushioning performance can be exhibited.

Further, in FIGS. 6 and 9, the storage body is illustrated as an object having five surfaces lacking the upper surface, but other storage bodies that form a closed space may be used. For example, the storage body may be a three-dimensional object having a spherical surface and three or more surfaces.

As the material of the cushioning material of the present disclosure, a paper member such as so-called corrugated cardboard or paperboard is exemplified as a raw material, but the material is not limited to the paper member. A sheet of any material having a small environmental load, for example, a biodegradable plastic, a sheet composed of a composite material of biodegradable plastic and another biodegradable composition, or the like may be used.
In the above description, expressions such as parallel, right angle, etc. are used, but these do not mean strict parallel, right angle, etc. It may be parallel or right-angled to the extent that it can function as a cushioning material, and an error of about 15% is allowed in consideration of the characteristics of the material. In addition, the example of mountain fold and valley fold is also an example, and it is not an essential difference. The mountain fold seen from one side of the paper sheet 40 corresponds to the valley fold seen from the other side.

It should be noted that this disclosure can be various embodiments and modifications without departing from the spirit and scope in a broad sense. Moreover, the above-described embodiment is for explaining the present disclosure, and does not limit the scope of the present disclosure. That is, the scope of the present disclosure is indicated by the claims, not the embodiments. And various modifications made within the scope of the claims and within the equivalent meaning of disclosure are considered to be within the scope of the present disclosure.

This application is based on Japanese Patent Application No. 2020-02314 filed on February 10, 2020, and includes the specification, claims, drawings and abstract. The disclosure in the above Japanese patent application is included in the present specification as a reference in its entirety.

10, 11 cushioning material, 12 packaging cushioning device, 40 paper sheet, 41 joint margin, 42 joint margin, 43 joint, 44 spacer, 50 packaging box, 60 packaging object, 70 packaging cushioning device, 80 packaging cushioning device , 90 packaging cushioning device, 90a cushioning unit, 90b cushioning unit, 100, 200, 300, 400 cushioning part, 101, 101A, 101B convex hexagonal shape part, 1011, 1020, 1021, 1040 opening hole, 1012 trapezoidal panel, 1013 trapezoidal Panel, 1014 trapezoidal panel, 1015 trapezoidal panel, 1016 valley fold line, 1017 mountain fold line, 1018 valley fold line, 1019 mountain fold line, 110 rectangular area, 120 rectangular area, 102A, 102B, 104A, 104B convex hexagonal part, 103A, 103B trapezoidal shape part.

Claims

Formed from biodegradable sheets,
Polygonal buffers are arranged in a staggered pattern, and polygonal opening holes are formed in a region surrounded by the plurality of buffers.
It bends at least three parallel lines of each of the shock absorbers, and the boundary line between the adjacent shock absorbers bends to form a bellows structure that bends and stretches in the load direction.
Cushioning material.
The plurality of shock absorbers have the same shape as each other and have the same shape.
Each of the shock absorbers has a shape in which polygons are arranged line-symmetrically with respect to a first line perpendicular to the load direction.
Each of the shock absorbers bends at least two second lines parallel to the first line and the first line.
The cushioning material according to claim 1.
The opening hole has a polygonal shape, and the second line is connected to any side of the opening hole.
The cushioning material according to claim 2.
Each of the buffers comprises two convex hexagonal portions that are symmetrical to each other in the first line.
The convex hexagonal shape portion
A first side that overlaps the first line, a second side that is parallel to the first side and longer than the first side, one end of the first side, and the second side. A first panel including a third side connecting one end and a fourth side connecting the other end of the first side and the other end of the second side.
A second side connecting the second side, a fifth side parallel to the second side and shorter than the second side, and one end of the second side and one end of the fifth side. A second panel including a sixth side and a seventh side connecting the other end of the second side and the other end of the fifth side is provided.
The cushioning material according to claim 2 or 3.
Each of the cushioning portions shares the sixth side and is in contact with the adjacent buffering portion.
Each of the buffers shares the seventh side and is in contact with another adjacent buffer.
The cushioning material according to claim 4.
The opening hole is
The fifth side of the first buffer and the two third sides of the second buffer,
The fifth side of the third buffer and the two fourth sides of the fourth buffer,
Formed in the area determined by,
The cushioning material according to claim 4 or 5.
The first side is a mountain fold,
The second side is a valley fold,
The sixth side is a mountain fold,
The 7th side is a mountain fold,
Has been
The cushioning material according to any one of claims 5 to 6.
The biodegradable sheet is molded into a tubular shape or a roll shape centered on the load direction.
The cushioning material according to any one of claims 1 to 7.
The biodegradable sheet is made of corrugated board or paperboard.
The cushioning material according to any one of claims 1 to 8.
The cushioning portion has two convex hexagonal shapes, the cushioning portion has a concave hexagonal shape, and the opening hole has a convex hexagonal shape.
Alternatively, the shock absorber has two straight hexagonal shapes, the shock absorber has an octagonal shape, and the opening hole has a quadrangular shape.
Alternatively, the shock absorber has two trapezoidal shapes, the shock absorber has a convex hexagonal shape, and the opening hole has a concave hexagonal shape.
The cushioning material according to claim 1.
A packaging cushioning device formed by arranging a plurality of cushioning materials according to any one of claims 1 to 10.
A plurality of the biodegradable sheets are laminated and formed.
The packaging shock absorber according to claim 11.
A packaging shock absorber formed by stacking a plurality of packaging shock absorbers according to claim 11 or 12.
A staggered hole forming process that forms staggered hexagonal holes in a flat plate-shaped member formed from paper,
It has a step of forming a bent portion in the flat plate-shaped member.
Manufacturing method of cushioning material.