JP2020164253A - Cushioning material and manufacturing method of the same - Google Patents

Abstract

To provide a cushioning material capable of obtaining a large repulsive force and a manufacturing method of the same.SOLUTION: A cushioning material 100 includes a first flat plate which is a paper member, a second flat plate, which is a paper member, and a cushioning portion 120, which is a paper member, is disposed between the first flat plate and the second flat plate, has a plurality of bent portions, and has at least one set of triangular portions sharing the bent portions. A set of triangular portions has a line-symmetrical shape with the bent portions as axes of symmetry.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a cushioning material and a method for producing the same.

In the field of packaging materials, paper packaging materials that are biodegradable and suitable for recycling are attracting attention from the viewpoint of environmental protection and the like. However, the cushioning material among the paper packing materials has a problem that it is difficult to receive a large load or change the size significantly as compared with the conventional cushioning material made of foamed resin.

In order to solve this problem, the cushioning material for packing disclosed in Patent Document 1 increases the amount of deformation by lengthening the portion where the plate material is folded and removing the interference portion of the folded portion.

Japanese Unexamined Patent Publication No. 2015-24847

When a plate material is bent to obtain a repulsive force as a cushioning material, the repulsive force is mainly due to the bending elastic force of the bent portion. Therefore, the repulsive force increases or decreases depending on the length of the bent portion.

In the packing cushioning material and the manufacturing method thereof disclosed in Patent Document 1, the folded portion is lengthened and the portion that interferes with each other is cut off. Therefore, the bent portion becomes short, and a large repulsive force cannot be obtained.

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 capable of obtaining a large repulsive force and a method for producing the same.

In order to achieve the above object, the cushioning material according to the present disclosure includes a first flat plate which is a paper member, a second flat plate which is a paper member, and a first flat plate and a second flat plate which are paper members. It has a cushioning portion, which is arranged between the two, has a plurality of bent portions, and has at least one set of triangular portions sharing the bent portion. A set of triangular portions has a line-symmetrical shape with the bent portion as the axis of symmetry.

According to the present disclosure, since a long bent portion is formed by forming a line-symmetrical triangular portion at the bent portion, it is possible to provide a cushioning material capable of obtaining a large repulsive force.

Perspective view of the cushioning material according to the first embodiment (A) Front view of the cushioning material of the cushioning material according to the first embodiment, (B) Front view of the cushioning material of the cushioning material having the bent portion formed according to the first embodiment. Development view of cushioning material which concerns on Embodiment 1. It is a figure of the comparative example which concerns on Embodiment 1, and is the perspective view of the cushioning material which folded the cushioning part in half in the internal space direction of the cushioning material. It is a figure of the comparative example which concerns on Embodiment 1, and is the development view of the cushioning material which folded the cushioning part in half in the internal space direction of the cushioning material. (A) and (B) are views of the modification of the cushioning material according to the first embodiment, and are development views of the cushioning material in which the length, position, and angle of the side forming the bent portion are changed. Perspective view of the packing box according to the first embodiment Perspective view of the cushioning material according to the second embodiment Development view of cushioning material which concerns on Embodiment 2. Perspective view of the packing box according to the third embodiment Perspective view of the cushioning material according to the fourth embodiment Development view of cushioning material which concerns on Embodiment 4 Perspective view of the cushioning material according to the fifth embodiment Development view of cushioning material which concerns on Embodiment 5.

Hereinafter, the cushioning material according to the embodiment will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the cushioning material 100 according to the first embodiment is the bottom plate 101 which is an example of the first flat plate, the top plate 106 which is an example of the second flat plate, and the bottom plate 101 and the top plate 106. It is provided with two cushioning portions 120, which connect both sides and support the top plate 106.

The cushioning material 100 is entirely formed of a paper member such as corrugated cardboard or cardboard.
The bottom plate 101 is a rectangular flat plate.

The top plate 106 is formed in a plate shape having the same shape as the bottom plate 101 as a whole by partially superimposing the top plate A104 and the top plate B105 and adhering them with an adhesive, tape, or the like. The top plate 106 is arranged so as to face the bottom plate 101.

The lower side of each of the two cushioning portions 120 is connected to two opposing sides of the bottom plate 101, and the upper side thereof is connected to the two opposite sides of the top plate 106, and the top plate 106 is supported on both sides thereof.

As shown in FIG. 2A, each cushioning portion 120 is formed in a rectangular shape when viewed from the front.

The lower end of each cushioning portion 120 is formed integrally with the bottom plate 101 and bent in a mountain fold to form a mountain fold bent portion 110. The mountain fold bent portion 110 corresponds to one side of the bottom plate 101 and the lower side of the cushioning portion 120.

Further, the upper end portion of each cushioning portion 120 is formed integrally with the top plate 106 and bent in a mountain fold to form a mountain fold bent portion 114. The mountain fold bending portion 114 corresponds to one side of the top plate 106 and the upper side of the cushioning portion 120.

A cutting line 113 orthogonal to the mountain fold bending portions 110 and 114 is formed in the central portion of the buffer portion 120, and is cut along the cutting line 113 from the mountain fold bending portion 110 to 114.

Further, a mountain fold bending portion 112 is formed in the central portion of the buffer portion 120 in parallel with the mountain fold bending portions 110 and 114.

Each rectangular area divided by the cutting line 113 of the buffer portion 120 is bent diagonally in a valley fold to form a valley fold bending portion 111.

Since the mountain fold bending portions 110, 112, 114 and the valley fold bending portion 111 are formed in this way, the buffer portion 120 is bent so as to overlap with the bottom plate 101 and the top plate 106 as a whole, and is bent in a plan view. The bottom plate 101 and the top plate 106 are within the fixed region.

Each cushioning portion 120 is divided into a large triangular portion 102A and 102B and a small triangular portion 103A to 103D by an outline and a mountain fold bending portion 110, 112, 114 and a valley folding bending portion 111.

The large triangular portion 102A is formed into an isosceles triangle with the mountain fold bending portion 110 as the base of the triangle and a part of the valley fold bending portion 111 as two sides. Similarly, the large triangular portion 102B is formed into an isosceles triangle with the mountain fold bending portion 114 as the base of the triangle and a part of the valley fold bending portion 111 as two sides.

Further, the small triangular portions 103A to 103D are formed in a right-angled triangular shape by an outer line, a part of the mountain fold bending portion 112, and a part of the valley fold bending portion 111.
The large triangular portions 102A and 102B, the small triangular portions 103A and 103B, and the small triangular portions 103C and 103D are formed line-symmetrically with respect to the line forming the mountain fold bending portion 112, respectively.

The top plate A104 and the top plate B105 are overlapped with each other and adhered to each other to form the top plate 106. Adhesion is performed with an adhesive, adhesive tape, or the like.

As shown in FIG. 3, the cushioning material 100 having the configuration shown in FIG. 1 can be formed by cutting and bending the plate material 150. The plate material 150 is a rectangular thin plate-like material. The plate material 150 is a paper member, for example, corrugated cardboard, cardboard, or the like.

Similar to FIG. 2A, the solid line in the figure represents the cutting line 113 and the outline line, the dotted line represents the line forming the valley fold bending portion 111, and the alternate long and short dash line represents the mountain fold bending portion 110, 112 and 114. Represents the line that forms. The cutting line 113 is a cut formed in the plate material 150 that penetrates and separates the plate material 150. The mountain fold bending portion is a portion where the designated portion becomes a convex portion, that is, a portion that is bent in a mountain shape. The valley fold bending portion is a portion where the designated portion becomes a recess, that is, a portion that is bent in a valley shape.

When assembling the cushioning material 100, first, a cutting line 113 is formed on the plate material 150. Subsequently, this is folded and the ends are connected to form a roll, and the bottom plate 101 and the top plate 106 are formed. Subsequently, by forming a plurality of bent portions in the two regions connecting the bottom plate 101 and the top plate 106, the bent portions are shared and the bent portions are the axes of symmetry, which is a line-symmetrical triangular region. Form a triangular part. As a result, the cushioning material 100 is manufactured.

Next, the action of the cushioning material 100 will be described.
When the bottom plate 101 and the top plate 106 come into contact with each other and the impact acceleration due to the inertial force is applied vertically downward to the object to be placed, the mountain fold bending portions 110, 112, 114 and the valley fold bending portion 111 bend, respectively. .. Along with this, the angle formed by the bottom plate 101 and the large triangular portion 102A, the angle formed by the top plate 106 and the large triangular portion 102B, the angle formed by the large triangular portions 102A and 102B and the small triangular portions 103A to 103D, the small triangular portion 103A to As shown in FIG. 2B, the angle formed by the 103Ds bends in a direction that decreases in the acute angle direction. Along with this bending, the top plate 106 is displaced vertically downward of the bottom plate 101 while being kept horizontal with respect to the bottom plate 101.

The impact energy applied to the top plate 106 of the cushioning material 100 is converted into elastic energy for bending the mountain fold bending portions 110, 112, 114 and the valley fold bending portions 111, and a part of the impact energy is converted into the mountain fold bending portions 110, 112. , 114, consumed by the plastic deformation energy of the valley fold bending portion 111. This alleviates the impact.

The repulsive force of the cushioning material is generated by the bending elastic force of the bent portion. Therefore, the longer the bent portion, the greater the repulsive force. Since the length of the bent portion of the cushioning material 100 is longer than that of the conventional one, a large cushioning force can be exhibited.

Here, for comparison, FIG. 4 shows a cushioning material 200 in which the cushioning portion is folded in half in the internal space direction of the cushioning material. The cushioning material 200 includes a bottom plate 201, a top plate A204 and a top plate B205 constituting the top plate 206, rectangular portions 202A and 202B constituting the cushioning portion 220, mountain fold bending portions 210 and 214, and valley fold bending portions. It has 211 and.

As shown in FIG. 5, the cushioning material 200 is formed by cutting and bending the plate material 250.
The plate material 250 is a rectangular thin plate-like material. This material is, for example, corrugated cardboard, cardboard and the like. The material, shape, and size of the plate material 250 are the same as those of the plate material 150. Further, the solid line in the drawing represents an outline line, the dotted line represents the line forming the valley fold bending portion 211, and the alternate long and short dash line represents the line forming the mountain fold bending portions 210 and 214.

The bottom plate 201 is a rectangular flat plate. On two opposite sides of the bottom plate 201, mountain fold bent portions 210 that are perpendicular to the longitudinal direction of the plate material 250 are formed. A mountain fold bending portion 214 is formed on the opposite side of the bottom plate 201 with the mountain fold bending portion 210 as a reference, perpendicular to the longitudinal direction of the plate material 250. The mountain fold bending portion 210 and the mountain fold bending portion 214 are parallel to each other, and the distance between them is equal to 1/2 of the length L in the width direction of the plate member 250. At the center between the mountain fold bending portion 210 and the mountain fold bending portion 214, the mountain fold bending portion 210 and the valley fold bending portion 211 parallel to the mountain fold bending portion 214 are formed.

As described above, the plate material 250 is bent according to the mountain fold bending portions 210 and 214 and the valley fold bending portion 211, and the top plate A204 and the top plate B205 are overlapped and formed, and the cushioning material 200 shown in FIG. 4 is formed. is there.

In the cushioning material 200, the bottom plate 201 is arranged as the bottom. The rectangular portion 202A is formed by sharing a mountain fold bending portion 210 on two opposite sides of the bottom plate 201. The rectangular portion 202A is bent in a direction overlapping the bottom plate 201 in a plan view. The rectangular portion 202B is formed by sharing the valley fold bending portion 211 with the rectangular portion 202A. The rectangular portion 202A and the rectangular portion 202B are bent in a direction in which they overlap each other in a plan view. The rectangular portion 202B is formed on the top plate A204 or the top plate B205, sharing the mountain fold bending portion 214. The top plate A204 and the top plate B205 are overlapped with each other and bonded to each other to form the top plate 206. Adhesion is performed with an adhesive, adhesive tape, or the like. The cushioning portion 220 is formed by the rectangular portions 202A and 202B, the mountain fold bending portions 210 and 214, and the valley fold bending portion 211. Two cushioning portions 220 are formed on the cushioning material 200. The top plate 206 and the bottom plate 201 have the same size and are parallel to each other.

The total length of the mountain-folded bent portions 210 and 214 and the valley-folded bent portion 211 of the cushioning material 200 is 6 L because the length of the plate material of the cushioning material 200 in the width direction is L.

On the other hand, in the cushioning material 100 shown in FIGS. 1 and 3, the total length of the mountain fold bent portions 110, 112 and 114 of the buffer portion 120 and the valley fold bent portion 111 is the length of the bent portion of the buffer portion 220. The length of the valley fold bending portion 111 is added to the total of 6L. The total length of the valley fold bent portion 111 is ((L / 2) × √2) × 8 = 4√2L≈5.66L. Therefore, the total length of the bent portions of the cushioning portion 120 of the cushioning material 100 is about 11.66 L, which is about 1.94 times as large as that of the cushioning material 200. Therefore, the repulsive force is also about 1.94 times. That is, even if the cushioning material is formed using the same plate material, the cushioning material 100 having a repulsive force 1.94 times that of the cushioning material 200 can be obtained.

By changing the shape of the shock absorber, it is possible to change the magnitude of the repulsive force. For example, as shown in FIGS. 6 (A) and 6 (B), the bent portions in the shock absorber extending in the oblique direction with respect to the mountain fold bent portions 210, 212, 214, and the valley fold bent portions 211. By changing the length and angle of the polygonal line to be formed, it is possible to change the length of the bent portion of the entire cushioning portion, and it is possible to change the repulsive force according to the length.

When an oblique bent portion is formed in the cushioning portion, at least two triangular portions share the bent portion, and the two triangular portions have a line-symmetrical shape with the shared bent portion as the axis of symmetry. To do. The small triangular portions 203A, 203B and 303A, 303B shown in FIGS. 6A and 6B are examples of line-symmetrical triangular portions that share the bent portion as the axis of symmetry.

Next, FIG. 7 illustrates the form of the packing box 400 in which the cushioning material 100 is arranged inside the packing box 410. A part of the packing box 410 is shown transparently in order to make it easier to understand the internal situation. In the cushioning material 100, the bottom plate 101 is in contact with the bottom surface inside the packing box 410 and is arranged on the bottom plate of the packing box 410. The size and shape of the bottom plate 101 is the same as the bottom surface inside the packing box 410.

The size and shape of the flat surface inside the packing box 410 are the same as the size and shape of the flat surface of the object to be packed 300. The height or depth of the inside of the packing box 410 is the same as the height or depth of the height of the packed object 300 and the height of the cushioning material 100 in a contracted state under the load of the packed object 300. is there.

The cushioning material 100 and the object to be packed 300 are inserted into the packing box 410, the flaps 411 and 412 are folded, and the flaps 411 and 412 are adhered with adhesive tape or the like. If the packing box 400 is dropped in this state, it is arranged between the packing box 410 which is the first object or the second object and the packed object 300 which is the second object or the first object. The cushioning material 100 absorbs the impact by compressing due to the impact of the drop, and then restores the distance between the packing box 410 and the object to be packed 300 by the repulsive force of the cushioning material 100.

(Embodiment 2)
Next, the cushioning material according to the second embodiment will be described. The cushioning material 500 according to the second embodiment is shown in FIGS. 8 and 9. The cushioning material 500 includes a bottom plate 501 which is a first flat plate, a top plate A504 and a top plate B505 which form a top plate 506 which is a second flat plate, and large triangular portions 502A and 502B which form a cushioning portion 520. The triangular portions 503A and 503B, the mountain fold bending portions 510, 512 and 514, the valley folding bending portion 511, and the top plate 506 have an insertion port 521 and an insertion port 522.

As shown in FIG. 9, the cushioning material 500 is formed by cutting and bending the plate material 550.
The plate material 550 is a paper member, for example, corrugated cardboard, cardboard, or the like. The solid line in the figure represents the outline line, the cutting line 513, and the line forming the insertion port 522, the dotted line represents the line forming the valley fold bending portion 511, and the alternate long and short dash line represents the mountain fold bending portion 510. Represents the lines forming 512 and 514.

Since the cushioning material 500 differs from the cushioning material 100 according to the first embodiment only in the top plate A504 and the top plate B505, only the top plate A504 and the top plate B505 will be described.

A plug 521 is formed at the end of the top plate B505. The insertion 521 is a T-shaped portion having protrusions protruding from the end portion of the top plate B505 and further protruding from both side surfaces of the tip portion.

When the top plate B505 is placed on the top plate A504 in order to assemble the cushioning material 500, the insertion port 522 is formed at a position where the protruding portion of the insertion 521 comes into contact with the top plate A504. The insertion port 522 is a slit into which the protruding portion of the insertion 521 is inserted, and is formed by a cutting line.

The cushioning material 500 is assembled by assembling the cushioning material 500 in the same manner as the cushioning material 100 and inserting the protruding portion of the insertion 521 of the top plate B505 into the insertion port 522. As described above, no adhesive, adhesive tape, or the like is required for assembly.

(Embodiment 3)
Next, the form of the packing box using two cushioning materials is illustrated in FIG. A part of the packing box 610 is shown transparently in order to make it easier to understand the internal condition of the packing box. In the packing box 600, two cushioning materials 100 and an object to be packed 300 are arranged inside the packing box 610. The inner width of the packing box 610 is the same as the width of the packed object 300 plus two heights of the cushioning material 100, and the depth is the same as the depth of the packed object 300. Is the same as the height of the packaged object 300. The flap of the packing box 610 is closed to form the packing box 600. The packing box 610 is an example of the first object, and the packed object 300 is an example of the second object.

The cushioning material 100 exerts a function of cushioning the impact applied to the packaged object 300 from the direction in which the cushioning material 100 exists.

(Embodiment 4)
Next, the cushioning material according to the fourth embodiment will be described.
The cushioning material 700 according to the fourth embodiment is shown in FIG. The cushioning material 700 connects the bottom plate 701, which is the first flat surface, the top plate 708, which is the second flat surface, and the four sides of the bottom plate 701 and the top plate 708, and the four cushioning portions 720 that indicate the top plate 708. , Equipped with. The shape and size of the bottom plate 701 are the same as those of the bottom plate 101 according to the first embodiment. Further, the shape of the bottom plate 701 is a quadrangle.

The top plate 708 is formed in a plate shape having the same shape as the bottom plate 701 as a whole by superimposing the top plate A704, the top plate B705, the top plate C706, and the top plate D707 and adhering them with an adhesive, tape, or the like. The top plate 708 is arranged so as to face the bottom plate 701.

The lower side of each of the four cushioning portions 720 is connected to the four sides of the bottom plate 701, the upper side thereof is connected to the four sides of the top plate 708, and the top plate 708 is supported by the four sides. Each of the cushioning portions 720 is the same as the cushioning portion 120 provided in the cushioning material 100 according to the first embodiment, and the large triangular portions 702A and 702B are in 102A and 102B, and the small triangular portions 703A to D are in 103A to 103D. The mountain fold bends 710, 712 and 714 correspond to 110, 112 and 114, and the valley fold bends 711 correspond to 111.

As shown in FIG. 12, the cushioning material 700 can be formed by cutting and bending the plate material 750. The plate material 750 is a single cross-shaped thin plate-shaped material. The plate material 750 is a paper member, for example, corrugated cardboard, cardboard, or the like. Similar to the first embodiment, the solid line in the drawing represents the cutting line 713 and the outer line, the dotted line represents the line forming the valley fold bending portion 711, and the alternate long and short dash line represents the mountain fold bending portion 710, 712 and 714. Represents the line to be formed. The cutting line 113 is a cut formed in the plate material 750 that penetrates and separates the plate material 750.

The method of assembling the cushioning material 700 will be described. First, two cushioning portions 720 connected to the top plate A704 and the top plate B705 are assembled so that the top plate A704 and the top plate B705 intersect above the bottom plate 701. The top plate A704 and the top plate B705 are overlapped and adhered with an adhesive, an adhesive tape, or the like. Next, the cushioning portion 720 connected to the top plate C706 and the top plate D707 is assembled so that the top plate C706 and the top plate D707 overlap the top plate A704 and the top plate B705 bonded earlier. The top plate C706 and the top plate D707 are adhered to the top plate A704 and the top plate B705 that have been previously adhered with an adhesive, an adhesive tape, or the like to form the top plate 708, and the cushioning material 700 is formed. assemble.

The cushioning material 700 assembled as described above has twice as many cushioning portions as the cushioning material 100 according to the first embodiment. Therefore, it has a bent portion that is twice as long as the cushioning material 100, and the repulsive force is also doubled. In other words, the cushioning material 700 doubles the total length of each bent portion 710 to 714 per unit area even though the area of the bottom plate 101 of the cushioning material 100 and the area of the bottom plate 701 of the cushioning material 700 are equal. It becomes possible to do. As a result, the repulsive force per unit area can be doubled as compared with the cushioning material 100, so that the repulsive force can be doubled. This is particularly effective for buffering a large mass to be packed, which requires a high repulsive force.

(Embodiment 5)
Next, the cushioning material according to the fifth embodiment will be described.
As shown in FIG. 13, the cushioning material according to the fifth embodiment is obtained by wrapping the circumference of the cushioning material 100 according to the first embodiment with a tubular cushioning material 810.

The tubular cushioning material 810 is connected to the bottom plate 811 having the same shape as the bottom plate 101 and the two opposite sides of the bottom plate 811 via a mountain fold bending portion 812, and has the same height as the thickness of the cushioning material 100. Two vertical walls 814 perpendicular to 101 and each vertical wall 814 are connected to each other via a mountain fold bending portion 813, and a top plate A815 and a top plate B816 having the same size as the bottom plate 811 are provided.

A development view of the tubular cushioning material 810 is shown in FIG.
The tubular cushioning material 810 is connected to the bottom plate 811 and two vertical walls 814 on both sides in the longitudinal direction via a line forming a mountain fold bending portion 812. Each of the vertical walls 814 is connected to the top plate A815 and the top plate B816 via a line forming the mountain fold bending portion 813.

The cushioning material 800 is assembled by the following procedure. First, the cushioning material 100 is placed on the bottom plate 811 of the tubular cushioning material 810 that has been turned inside out. Next, the mountain fold bending portion 812, which is a valley fold when viewed from the back side of the two places, is folded into a valley fold along the cushioning material 100. Next, the mountain fold bending portion 813 which is a valley fold when viewed from the back side is bent, and the top plate A815 and the top plate B816 are overlapped with the top plate 106 of the cushioning material 100 so that the top plate A815 is on the outside. Finally, the end portion 817 of the top plate A815 is adhered to the vertical wall 814 with an adhesive, adhesive tape, or the like. As a result, the bottom plate 811 which is a flat plate is circumscribed to the bottom plate 101, the flat plate on which the top plate A815 and the top plate B816 are overlapped is circumscribed to the top plate 106, and the vertical wall 814 is the bottom plate 811, the top plate A815, and the top plate. It is formed perpendicularly to the bottom plate 811 and the above-mentioned flat plate between the flat plates on which the B816 is overlapped.

Next, the effect of the fifth embodiment will be described.
It has already been mentioned that the repulsive force that produces the cushioning action of the cushioning material 100 depends on the total length of the mountain fold bending portion and the valley fold bending portion of the cushioning material. However, when the weight of the packaged object is large, there is a concern that each bent portion may not be able to withstand the weight of the packaged object and may be plastically deformed, so that the originally expected cushioning action cannot be exhibited. However, by covering the cushioning material 100 with the tubular cushioning material 810, not only the repulsive force of each bent portion of the cushioning material 100 but also the buckling deformation of the vertical wall 814 of the tubular cushioning material 810 can absorb the energy required for cushioning. It is done by. Since the vertical wall 814 is intended to absorb energy by buckling deformation in this way, the perpendicularity to the bottom plate 101 does not mean that it is exactly 90 °, and buckling is possible. In the range, the angle may deviate from 90 °, for example, the concept includes within about 90 ± 25 °.

Further, since each bent portion is deformed according to the weight of the object to be packed, it is not easy to keep the height of the cushioning material 100 at the time of packing, that is, the distance between the bottom plate 101 and the top plate 106 constant. If the deformation is large, a gap is generated between the packed object and the cushioning material 100, or between the packed object and the packing box, which causes rattling during transportation of the packing box. However, by using the cushioning material 800 using the tubular cushioning material 810, the height of the vertical wall 814 is constant as long as the vertical wall 814 of the tubular cushioning material 810 does not reach buckling. Since it can be maintained, there is no gap between the packed object and the cushioning material 100, or between the packed object and the packing box.

Although the contents of the fifth embodiment have been described above, the cushioning material used inside the tubular cushioning material 810 may be the cushioning material 100 or the cushioning material 700. Further, in the tubular cushioning material 810, when the buckling strength is insufficient with the two vertical walls 814, the tubular cushioning material 810 may be box-shaped to have a structure having four vertical walls.

In addition, the present disclosure is not limited to the above embodiment, and various modifications and applications are possible.
For example, the number of cutting lines 113 of each buffer 120 may be increased. The front view shape of each shock absorber 120 may be a shape other than a rectangle, for example, a trapezoid. Further, the number of polygonal lines formed in each buffer portion 120 may be increased or decreased. The polygonal line may be formed so as to be interrupted in the middle of the buffer portion 120.
Further, although the example in which the cushioning portion 120 overlaps with the bottom plate 101 and the top plate 106 is shown, the cushioning portion 120 may project outward.

100 cushioning material, 101 bottom plate, 102A large triangle part, 102B large triangle part, 103A small triangle part, 103B small triangle part, 103C small triangle part, 103D small triangle part, 104 top plate A, 105 top plate B, 106 top plate , 110 mountain fold bend, 111 valley fold bend, 112 mountain fold bend, 113 cutting line, 114 mountain fold bend, 120 buffer, 150 plate, 200 cushion, 201 bottom plate, 202A rectangular, 202B rectangular , 203A small triangle, 203B small triangle, 303A small triangle, 303B small triangle, 204 top plate A, 205 top plate B, 206 top plate, 210 mountain fold bend, 211 valley fold bend, 212 mountain fold Bending part, 214 mountain fold bending part, 220 cushioning part, 250 plate material, 300 packaged object, 400 packing box, 410 packing box, 411 flap, 412 flap, 500 cushioning material, 501 bottom plate, 502A large triangle part, 502B large triangle Part, 503A small triangle, 503B small triangle, 504 top plate A, 505 top plate B, 506 top plate, 510 mountain fold bend, 511 valley fold bend, 512 mountain fold bend, 513 cutting line, 514 mountain Folded part, 520 shock absorber, 521 insertion, 522 insertion port, 550 plate material, 600 packing box, 610 packing box.
700 cushioning material, 701 bottom plate, 702A large triangle part, 702B large triangle part, 703A small triangle part, 703B small triangle part, 703C small triangle part, 703D small triangle part, 704 top plate A, 705 top plate B, 706 top plate C, 707 top plate D, 708 top plate, 710 mountain fold bend, 711 valley fold bend, 712 mountain fold bend, 713 cutting line, 714 mountain fold bend, 715 mountain fold bend, 720 cushioning part, 750 Plate material, 800 cushioning material, 810 tubular cushioning material, 811 bottom plate, 812 mountain fold bend, 813 mountain fold bend, 814 vertical wall, 815 top plate A, 816 top plate B, 817 end

Claims (6)

The first flat plate, which is a paper member,
The second flat plate, which is a paper member,
A paper member, a cushioning portion which is arranged between the first flat plate and the second flat plate, has a plurality of bent portions, and has at least one set of triangular portions sharing the bent portion. Have and
The set of triangular portions has a line-symmetrical shape with the bent portion as the axis of symmetry.
Cushioning material. The set of triangular portions is a triangular region of a plate-shaped paper member determined by an outline and a bent portion.
The cushioning material according to claim 1. The shock absorber
A mountain fold bending portion formed by connecting one side to one side of the first flat plate in a mountain fold,
A mountain fold bent portion formed by connecting the other side to one side of the second flat plate in a mountain fold,
A mountain fold bent portion formed by fold a mountain in parallel with the one side and the other side,
A valley fold bend portion that is inclined with respect to any of the mountain fold bend portions.
The cushioning material according to claim 1 or 2. The cushioning portion is formed in a quadrangular shape when viewed from the front, and one side is connected to the first flat plate in a mountain fold.
The side facing the one side is connected to one side of the second flat plate in a mountain fold.
A mountain fold bent portion formed by fold a mountain in parallel with the one side and the opposite side,
A valley fold bend that is inclined with respect to any of the mountain fold bends,
A valley fold bend formed by valley fold along the diagonal of the quadrangle,
To prepare
The cushioning material according to claim 1, 2 or 3. The cushioning material according to any one of claims 1 to 4,
A paper member having a flat plate circumscribing the first flat plate and the second flat plate of the cushioning material, and a vertical wall formed perpendicular to the flat plate between the flat plates.
Cushioning material with. By folding the plate-shaped paper member into a roll shape and connecting the ends, a bottom plate and a top plate are formed.
By forming a plurality of bent portions in the region connecting the bottom plate and the top plate, the bent portions are shared and a line-symmetric triangular portion having the bent portion as a symmetric axis is formed.
Manufacturing method of cushioning material.

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