JP7349934B2 - Cushioning material and its manufacturing method - Google Patents

Description

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

In the field of packaging materials, from the viewpoint of environmental protection, paper packaging materials are attracting attention because they are biodegradable and suitable for recycling. However, the problem with cushioning materials among paper packaging materials is that they are difficult to absorb large loads or undergo large dimensional changes compared to conventional cushioning materials made of foamed resin.

In order to solve this problem, the packing cushioning material disclosed in Patent Document 1 increases the amount of deformation by lengthening the folding portion of the plate material and cutting out the interfering portion of the folding portion.

JP2015-24847A

When bending a plate material to obtain a repulsive force as a buffer 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 packaging cushioning material and its manufacturing method disclosed in Patent Document 1, the folded portions are made long and the portions that interfere with each other are removed. For this reason, the bent portion becomes short and it is not possible to obtain a large repulsive force.

The present disclosure has been made in view of the above circumstances, and aims to provide a cushioning material that can obtain a large repulsive force and a method for manufacturing the same.

In order to achieve the above object, a cushioning material according to the present disclosure includes a first flat plate that is a paper member, a second flat plate that is a paper member, and a first flat plate that is a paper member and a second flat plate that is a paper member. and a buffer section having at least one set of triangular parts disposed between the two and having a plurality of bent parts and sharing the bent parts. The set of triangular parts has a line-symmetrical shape with the bent part as an axis of symmetry , with the corners abutted against each other, and the abutted corners of the triangular parts are diagonal angles .

According to the present disclosure, since the linearly symmetrical triangular portion is formed with a bent portion and has a long bent portion, it is possible to provide a cushioning material that can obtain a large repulsion force.

A perspective view of a cushioning material according to Embodiment 1 (A) A front view of the buffer part of the buffer material according to Embodiment 1, (B) A front view of the buffer part of the buffer material in which the bent part is formed according to Embodiment 1. Developed view of cushioning material according to Embodiment 1 FIG. 2 is a diagram of a comparative example according to Embodiment 1, and is a perspective view of a cushioning material in which the cushioning portion is folded in half in the direction of the internal space of the cushioning material. FIG. 3 is a diagram of a comparative example according to Embodiment 1, and is a developed view of a cushioning material in which the cushioning part is folded in half in the direction of the internal space of the cushioning material. (A) and (B) are diagrams of modified examples of the cushioning material according to Embodiment 1, and are developed views of the cushioning material in which the length, position, and angle of the side forming the bent part are changed. A perspective view of a packaging box according to Embodiment 1 A perspective view of a cushioning material according to Embodiment 2 Developed view of cushioning material according to Embodiment 2 A perspective view of a packaging box according to Embodiment 3 A perspective view of a cushioning material according to Embodiment 4 Developed view of cushioning material according to Embodiment 4 A perspective view of a cushioning material according to Embodiment 5 Developed view of cushioning material according to Embodiment 5

Hereinafter, a cushioning material according to an 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 includes a bottom plate 101 which is an example of a first flat plate, a top plate 106 which is an example of a second flat plate, and a combination of the bottom plate 101 and the top plate 106. Two buffer sections 120 are provided that connect both sides and support the top plate 106.

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

The top plate 106 is formed by partially overlapping a top plate A 104 and a top plate B 105 and bonding them together with adhesive, tape, etc., and is formed into a plate having the same shape as the bottom plate 101 as a whole. The top plate 106 is arranged to face the bottom plate 101.

The two buffer parts 120 each have their lower sides connected to the two opposing sides of the bottom plate 101, their upper sides connected to the two opposing sides of the top plate 106, and support the top plate 106 on both sides thereof.

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

The lower end portion of each buffer portion 120 is formed integrally with the bottom plate 101 and is bent in a mountain-fold manner 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 buffer portion 120 .

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

A cutting line 113 perpendicular to the mountain-fold bending parts 110 and 114 is formed in the center of the buffer part 120, and a cut is made from the mountain-fold bending parts 110 to 114 along the cutting line 113.

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

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

Since the mountain-fold bent parts 110, 112, 114 and the valley-fold bent part 111 are formed in this way, the buffer part 120 as a whole is bent to overlap with the bottom plate 101 and the top plate 106, and when viewed from above Therefore, the bottom plate 101 and the top plate 106 are within the determined area.

Each buffer portion 120 is divided into large triangular portions 102A and 102B and small triangular portions 103A to 103D by the outline, the mountain-fold bent portions 110, 112, and 114, and the valley-fold bent portion 111.

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

Further, the small triangular portions 103A to 103D are formed into a right triangular shape by the outline, a portion of the mountain-fold bent portion 112, and a portion of the valley-fold bent portion 111.
The large triangular parts 102A and 102B, the small triangular parts 103A and 103B, and the small triangular parts 103C and 103D are each formed symmetrically with respect to the line forming the mountain-fold bent part 112.

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

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

Similar to FIG. 2(A), the solid lines in the figure represent the cutting line 113 and the outline line, the dotted lines represent the lines forming the valley-fold bent portion 111, and the dashed-dotted lines represent the mountain-fold bent portions 110, 112, and 114. represents the line forming the . Note that the cutting line 113 is a cut formed in the plate material 150 that cuts through the plate material 150. The mountain-fold bent portion is a portion where the designated portion becomes a convex portion, that is, a portion that is bent into a mountain shape. The valley-fold bent portion is a portion where the designated portion becomes a concave portion, 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, thereby forming the bottom plate 101 and the top plate 106. Next, by forming a plurality of bent parts in the two areas connecting the bottom plate 101 and the top plate 106, a triangular area that shares the bent parts and is line symmetrical with the bent parts as the axis of symmetry is created. Form a triangle. In this way, the cushioning material 100 is manufactured.

Next, the function of the buffer material 100 will be explained.
When an impact acceleration due to an inertial force is applied vertically downward to the packaged item that is in contact with the bottom plate 101 and the top plate 106 and is placed in a fixed position, the mountain-fold bending parts 110, 112, 114 and the valley-fold bending part 111 bend, respectively. . Along with this, the angle between the bottom plate 101 and the large triangular part 102A, the angle between the top plate 106 and the large triangular part 102B, the angle between the large triangular parts 102A and 102B and the small triangular parts 103A to 103D, and the small triangular parts 103A to As shown in FIG. 2(B), the angle formed by the 103Ds is bent in a direction that becomes smaller in the acute angle direction. With this bending, the top plate 106 is displaced downward in the vertical direction of the bottom plate 101 while remaining horizontal with respect to the bottom plate 101.

In this way, the impact energy applied to the top plate 106 of the cushioning material 100 is converted into elastic energy that bends the mountain-fold bending parts 110, 112, 114 and the valley-fold bending part 111, and a part of it is converted into elastic energy that bends the mountain-fold bending parts 110, 112, 114. , 114, is consumed by the plastic deformation energy of the valley-fold bent portion 111. This reduces the impact.

The repulsive force of the cushioning material is generated by the bending elastic force of the bent portion. Therefore, the longer the length of 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 cushioning material, a large cushioning force can be exerted.

For comparison, FIG. 4 shows a cushioning material 200 in which the cushioning portion is folded in half in the direction of the internal space of the cushioning material. The cushioning material 200 includes a bottom plate 201, a top plate A204 and a top plate B205 that constitute a top plate 206, rectangular parts 202A and 202B that constitute a buffer section 220, mountain-fold bent parts 210 and 214, and a valley-fold bent part. 211.

The cushioning material 200 is formed by cutting and bending a plate material 250, as shown in FIG.
The plate material 250 is a rectangular thin plate-like material. This material is, for example, corrugated cardboard, paperboard, etc. Note that the material, shape, and size of the plate material 250 are the same as those of the plate material 150. Moreover, the solid line in the figure represents the outline line, the dotted line represents the line forming the valley-fold bending part 211, and the one-dot chain line represents the line forming the mountain-fold bending part 210 and 214.

The bottom plate 201 is a rectangular flat plate. Mountain-fold bent portions 210 that are perpendicular to the longitudinal direction of the plate material 250 are formed on two opposing sides of the bottom plate 201 . A mountain-fold bent part 214 is formed perpendicularly to the longitudinal direction of the plate material 250 on the opposite side of the bottom plate 201 with respect to the mountain-fold bent part 210 . The mountain-fold bent portion 210 and the mountain-fold bent portion 214 are parallel, and the interval therebetween is equal to 1/2 of the length L in the width direction of the plate material 250. A valley-fold bent portion 211 parallel to the mountain-fold bent portion 210 and the mountain-fold bent portion 214 is formed at the center between the mountain-fold bent portion 210 and the mountain-fold bent portion 214.

As described above, the cushioning material 200 shown in FIG. 4 is formed by bending the plate material 250 according to the mountain-fold bent portions 210 and 214 and the valley-fold bent portion 211, and overlapping the top plate A 204 and the top plate B 205. be.

The cushioning material 200 has a bottom plate 201 disposed as a bottom portion. The rectangular portion 202A is formed on two opposing sides of the bottom plate 201, sharing a mountain fold bent portion 210. The rectangular portion 202A is bent in a direction overlapping the bottom plate 201 in plan view. The rectangular portion 202B is formed in the rectangular portion 202A so as to share the valley fold bent portion 211. 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 bent portion 214. The top plate A204 and the top plate B205 are overlapped and bonded to each other to form a top plate 206. Adhesion is performed using an adhesive, adhesive tape, or the like. The rectangular portions 202A and 202B, the mountain-fold bent portions 210 and 214, and the valley-fold bent portion 211 form a buffer portion 220. The buffer portions 220 are formed at two locations on the buffer 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-fold bent portions 210 and 214 and the valley-fold bent portion 211 of the cushioning material 200 is 6L because the length in the width direction of the plate material of the cushioning material 200 is L.

On the other hand, in the cushioning material 100 shown in FIGS. 1 and 3, the sum of the lengths of the mountain-fold bent portions 110, 112, and 114 and the valley-fold bent portion 111 of the buffer portion 120 is equal to the length of the bent portion of the buffer portion 220. The length of the valley-fold bent portion 111 is added to the total 6L. The total length of this valley-fold bent portion 111 is ((L/2)×√2)×8=4√2L≈5.66L. Therefore, the total length of the bent portions of the buffer portions 120 of the cushioning material 100 is approximately 11.66L, which is approximately 1.94 times as long as the bending portions of the cushioning material 200. Therefore, the repulsion force also increases by about 1.94 times. In other words, even if the same plate material is used to form the cushioning material, the cushioning material 100 having a repulsion force 1.94 times that of the cushioning material 200 can be obtained.

Note that by changing the shape of the buffer part, it is possible to change the magnitude of the repulsive force. For example, as shown in FIGS. 6(A) and 6(B), bent portions extending obliquely to the mountain-fold bent portions 210, 212, 214 and the valley-fold bent portion 211 in the buffer portion are By changing the length and angle of the bent line to be formed, it is possible to change the length of the bent portion of the entire buffer section, and it is possible to change the repulsive force according to the length.

In addition, when forming a diagonal bent part in the buffer part, at least two triangular parts should share the bent part, and the two triangular parts should have a line-symmetrical shape with the shared bent part as the axis of symmetry. do. The small triangular parts 203A, 203B and 303A, 303B shown in FIGS. 6(A) and 6(B) are examples of line-symmetrical triangular parts that share the bent part as an axis of symmetry.

Next, FIG. 7 illustrates an example of a packaging box 400 in which the cushioning material 100 is placed inside the packaging box 410. Note that a part of the packaging box 410 is shown transparently to make it easier to understand the internal situation. The cushioning material 100 is placed on the bottom plate of the packaging box 410, with the bottom plate 101 coming into contact with the bottom surface inside the packaging box 410. The size and shape of the bottom plate 101 are the same as the bottom surface inside the packaging box 410.

The size and shape of the plane inside the packaging box 410 are the same as the size and shape of the plane of the object to be packed 300. The height or depth of the inside of the packaging box 410 is the same as the sum of the height of the object to be packed 300 and the height of the cushioning material 100 when it is compressed under the load of the object to be packed 300. be.

The cushioning material 100 and the object to be packed 300 are inserted into the packaging box 410, the flaps 411 and 412 are folded up, and the flaps 411 and 412 are adhered with adhesive tape or the like. If the packaging box 400 is dropped in this state, it will be placed between the packaging box 410, which is the first object or the second object, and the object to be packed 300, which is the second object or the first object. The cushioning material 100 absorbs the impact by being compressed by the impact of the fall, and then the distance between the packaging box 410 and the object to be packed 300 is returned to its original value by the repulsive force of the cushioning material 100.

(Embodiment 2)
Next, a cushioning material according to Embodiment 2 will be explained. A cushioning material 500 according to Embodiment 2 is shown in FIGS. 8 and 9. The cushioning material 500 includes a bottom plate 501 that is a first flat plate, a top plate A504 and a top plate B505 that constitute a top plate 506 that is a second flat plate, large triangular parts 502A and 502B, and small triangular parts that constitute a buffer section 520. The triangular parts 503A and 503B, the mountain-fold bent parts 510, 512, and 514, the valley-fold bent part 511, and the top plate 506 have an insertion 521 and an insertion opening 522.

As shown in FIG. 9, the cushioning material 500 is formed by cutting and bending a plate material 550.
The plate material 550 is a paper member, for example, corrugated board, cardboard, or the like. In addition, 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 part 511, and the dashed line represents the mountain fold bending part 510. , 512 and 514.

Since the cushioning material 500 differs from the cushioning material 100 according to Embodiment 1 only in the top plate A504 and the top plate B505, only the top plate A504 and the top plate B505 will be described.

An insert 521 is formed at the end of the top plate B505. The insert 521 is a T-shaped portion that protrudes from the end of the top plate B505 and has protrusions that further protrude from both sides of the tip.

In order to assemble the cushioning material 500, an insertion opening 522 is formed at a position where the protrusion of the insertion 521 comes into contact with the top plate A504 when the top plate B505 is stacked on the top plate A504. The insertion opening 522 is a slit into which the protrusion of the insertion part 521 is inserted, and is formed by a cutting line.

The cushioning material 500 is assembled in the same manner as the cushioning material 100, and the protrusion of the insertion 521 of the top plate B505 is inserted into the insertion opening 522. Thus, no adhesives, adhesive tapes, etc. are required for assembly.

(Embodiment 3)
Next, the form of a packaging box using two cushioning materials is illustrated in FIG. Note that a part of the packaging box 610 is shown transparently to make it easier to understand the situation inside the packaging box. In the packaging box 600, two cushioning materials 100 and an object to be packed 300 are placed inside the packaging box 610. The internal width of the packaging box 610 is the same as the width of the object to be packed 300 plus two heights of the cushioning material 100, and the depth is the same as the depth of the object to be packed 300, and the height is the same as the height of the object to be packed 300. The flap of the packaging box 610 is closed to form the packaging box 600. Note that the packaging box 610 is an example of a first object, and the object to be packed 300 is an example of a second object.

The cushioning material 100 exhibits a function of buffering the impact applied to the object to be packed 300 from the direction in which the cushioning material 100 exists.

(Embodiment 4)
Next, a cushioning material according to Embodiment 4 will be explained.
A cushioning material 700 according to Embodiment 4 is shown in FIG. The cushioning material 700 includes a bottom plate 701 that is a first plane, a top plate 708 that is a second plane, and four buffer parts 720 that connect the four sides of the bottom plate 701 and the top plate 708 and direct the top plate 708. , is provided. Note that the shape and size of the bottom plate 701 are the same as the bottom plate 101 according to the first embodiment. Furthermore, the shape of the bottom plate 701 is a square.

The top plate 708 has a top plate A 704 , a top plate B 705 , a top plate C 706 , and a top plate D 707 stacked on top of each other and bonded together with adhesive, tape, etc., and is formed into a plate having the same shape as the bottom plate 701 as a whole. The top plate 708 is arranged opposite to the bottom plate 701.

Each of the four buffer parts 720 has its lower side connected to the four sides of the bottom plate 701, its upper side connected to the four sides of the top plate 708, and supports the top plate 708 on the four sides. Each buffer section 720 is similar to the buffer section 120 included in the buffer material 100 according to Embodiment 1, and the large triangular sections 702A and 702B are 102A and 102B, and the small triangular sections 703A to 703D are 103A to 103D. The mountain-fold bent portions 710, 712, and 714 correspond to 110, 112, and 114, and the valley-fold bent portion 711 corresponds to 111.

The cushioning material 700 can be formed by cutting and bending a plate material 750, as shown in FIG. The plate material 750 is a cross-shaped thin plate material. The plate material 750 is a paper member, for example, corrugated board, cardboard, or the like. As in Embodiment 1, the solid lines in the figure represent the cutting line 713 and the outline line, the dotted lines represent the lines forming the valley-fold bent portion 711, and the dashed-dotted lines represent the mountain-fold bent portions 710, 712, and 714. Represents the line to be formed. Note that the cutting line 113 is a cut formed in the plate material 750 that cuts through the plate material 750.

A method for assembling the cushioning material 700 will be explained. First, two buffer parts 720 connected to the top plate A 704 and the top plate B 705 are assembled so that the top plate A 704 and the top plate B 705 intersect above the bottom plate 701 . Top plate A704 and top plate B705 are placed one on top of the other and bonded together with adhesive, adhesive tape, or the like. Next, the buffer section 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 that were previously adhered. A top plate 708 is formed by adhering the top plate C706 and the top plate D707 to the top plate A704 and top plate B705 that were previously adhered with adhesive, adhesive tape, etc., and the cushioning material 700 is attached. assemble.

The buffer material 700 assembled as described above has twice the buffer portion as the buffer material 100 according to the first embodiment. Therefore, it has a bent portion twice as long as the cushioning material 100, and the repulsion force is also doubled. In other words, in the cushioning material 700, although 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, the total length of each bent portion 710 to 714 per unit area is doubled. It becomes possible to do so. As a result, the repulsive force per unit area can be doubled compared to the cushioning material 100, so that twice the repulsive force can be obtained. This is particularly effective for cushioning a large object to be packed that requires a high repulsion force.

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

The cylindrical cushioning material 810 has a bottom plate 811 having the same shape as the bottom plate 101, and is connected to two opposing sides of the bottom plate 811 via mountain-fold bent portions 812, and has the same height as the thickness of the cushioning material 100. Two vertical walls 814 perpendicular to 101 and a top plate A 815 and a top plate B 816 connected to each vertical wall 814 via a mountain-fold bent portion 813 and having the same size as the bottom plate 811 are provided.

A developed view of the cylindrical cushioning material 810 is shown in FIG.
The cylindrical cushioning material 810 is connected to a bottom plate 811 and two vertical walls 814 via a line forming a mountain-fold bent portion 812 on both sides of the bottom plate 811 in the longitudinal direction. The vertical walls 814 are connected to the top plate A 815 and the top plate B 816 via lines forming the mountain-fold bent portions 813, respectively.

The cushioning material 800 is assembled using the following procedure. First, the cushioning material 100 is placed on the bottom plate 811 of the cylindrical cushioning material 810 that has been turned over. Next, the two mountain-fold bent portions 812, which are valley folds when viewed from the back side, are folded along the cushioning material 100 into valley folds. Next, the mountain-fold bent 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 stacked on top of 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 adhesive, adhesive tape, or the like. As a result, the bottom plate 811, which is a flat plate, circumscribes the bottom plate 101, the flat plate obtained by overlapping the top plate A815 and the top plate B816 circumscribes the top plate 106, and the vertical wall 814 is connected to the bottom plate 811, the top plate A815, and the top plate. The base plate 811 is formed perpendicularly to the bottom plate 811 and the above-mentioned flat plate between the flat plates stacked on top of each other.

Next, the effects of the fifth embodiment will be explained.
It has already been mentioned that the repulsive force that produces the buffering effect of the cushioning material 100 depends on the total length of the mountain and valley bends that the cushioning material has. However, if the weight of the object to be packed is large, each bent portion may not be able to withstand the weight of the object and undergo plastic deformation, and there is a concern that the originally expected cushioning effect may not be exerted. However, by covering the cushioning material 100 with the cylindrical cushioning material 810, the energy absorption required for cushioning is absorbed not only by the repulsive force of each bending part of the cushioning material 100, but also by the buckling deformation of the vertical wall 814 of the cylindrical cushioning material 810. This is done by Since the vertical wall 814 is intended to absorb energy through buckling deformation, being perpendicular to the bottom plate 101 does not mean strictly 90 degrees; The concept is that the angle may deviate from 90° within the range, for example, within about 90±25°.

Furthermore, since each bent portion deforms depending on the weight of the item to be packed, it is not easy to maintain a constant height of the cushioning material 100 when packed, that is, the distance between the bottom plate 101 and the top plate 106. If the deformation is large, a gap will be created between the item to be packed and the cushioning material 100 or between the item to be packed and the packaging box, which will cause the packaging box to rattle during transportation. However, by using the cushioning material 800 using the cylindrical cushioning material 810, the height of the vertical wall 814 is kept constant as long as the weight is within a weight range that does not cause the vertical wall 814 of the cylindrical cushioning material 810 to buckle. Therefore, there will be no gap between the object to be packed and the cushioning material 100 or between the object to be packed and the packaging box.

Although the content of the fifth embodiment has been described above, the buffer material used inside the cylindrical buffer material 810 may be either the buffer material 100 or the buffer material 700. Furthermore, in the case where the two vertical walls 814 in the cylindrical shock absorbing material 810 do not have enough buckling strength, the cylindrical shock absorbing material 810 may be made into a box shape and may have a structure having four vertical walls.

In addition, the present disclosure is not limited to the above embodiments, and various modifications and applications are possible.
For example, the number of cutting lines 113 in each buffer section 120 may be increased. The shape of each buffer section 120 when viewed from the front may be a shape other than a rectangle, for example, a trapezoid. Further, the number of polygonal lines formed in each buffer section 120 may be increased or decreased. The polygonal line may be formed so as to be interrupted in the middle of the buffer section 120.
Further, although an example has been shown in which the buffer portion 120 overlaps the bottom plate 101 and the top plate 106, the buffer portion 120 may protrude outward.

100 Cushioning material, 101 Bottom plate, 102A Large triangular part, 102B Large triangular part, 103A Small triangular part, 103B Small triangular part, 103C Small triangular part, 103D Small triangular part, 104 Top plate A, 105 Top plate B, 106 Top plate , 110 mountain-fold bent part, 111 valley-fold bent part, 112 mountain-fold bent part, 113 cutting line, 114 mountain-fold bent part, 120 buffer part, 150 plate material, 200 buffer material, 201 bottom plate, 202A rectangular part, 202B rectangular part , 203A small triangular part, 203B small triangular part, 303A small triangular part, 303B small triangular part, 204 top plate A, 205 top plate B, 206 top plate, 210 mountain fold bent part, 211 valley fold bent part, 212 mountain fold Bent part, 214 Mountain-fold bent part, 220 Buffer part, 250 Plate material, 300 Item to be packed, 400 Packing box, 410 Packing box, 411 Flap, 412 Flap, 500 Cushioning material, 501 Bottom plate, 502A Large triangular part, 502B Large triangle part, 503A small triangular part, 503B small triangular part, 504 top plate A, 505 top plate B, 506 top plate, 510 mountain fold bent part, 511 valley fold bent part, 512 mountain fold bent part, 513 cutting line, 514 mountain Bending portion, 520 Buffer portion, 521 Insertion, 522 Inlet, 550 Board material, 600 Packing box, 610 Packing box.
700 Cushioning material, 701 Bottom plate, 702A Large triangular part, 702B Large triangular part, 703A Small triangular part, 703B Small triangular part, 703C Small triangular part, 703D Small triangular part, 704 Top plate A, 705 Top plate B, 706 Top plate C, 707 Top plate D, 708 Top plate, 710 Mountain-fold bending part, 711 Valley-fold bending part, 712 Mountain-fold bending part, 713 Cutting line, 714 Mountain-fold bending part, 715 Mountain-fold bending part, 720 Buffer part, 750 plate material, 800 cushioning material, 810 cylindrical cushioning material, 811 bottom plate, 812 mountain fold bending part, 813 mountain fold bending part, 814 vertical wall, 815 top plate A, 816 top plate B, 817 end part

Claims (7)

a first flat plate that is a paper member;
a second flat plate that is a paper member;
a buffer section that is a paper member, is arranged between the first flat plate and the second flat plate, has a plurality of bent parts, and has at least one set of triangular parts that share the bent parts; have,
The pair of triangular portions have a line-symmetrical shape with the bent portion as an axis of symmetry with their respective corners abutted against each other, and have a shape in which the abutted corners thereof are diagonal angles .
Buffer material. a first flat plate that is a paper member;
a second flat plate that is a paper member;
a buffer section that is a paper member, is arranged between the first flat plate and the second flat plate, has a plurality of bent parts, and has at least one set of triangular parts that share the bent parts; have,
The pair of triangular parts have a line-symmetrical shape with the bent part as an axis of symmetry,
The buffer section is formed into a rectangular shape when viewed from the front.
one side is connected to the first flat plate in a mountain fold,
A side opposite to the one side is connected to one side of the second flat plate in a mountain fold,
a mountain-fold bent portion formed by mountain-folding parallel to the one side and the opposing side;
a valley-fold bending part that is inclined with respect to any of the mountain-fold bending parts;
a valley-fold bent portion formed by valley-folding along the diagonal of the quadrangle;
Equipped with
Buffer material. The set of triangular parts is a triangular area defined by the outline and the bent part of the plate-shaped paper member.
The cushioning material according to claim 1 or 2 . The buffer section is
a mountain-fold bent portion configured such that one side is connected to one side of the first flat plate in a mountain-fold manner;
a mountain-fold bent portion formed by connecting one side of the second flat plate with the other side in a mountain-fold manner;
a mountain-fold bent portion formed by mountain-folding parallel to the one side and the other side;
a valley-fold bent portion that is inclined with respect to any of the mountain-fold bent portions;
The cushioning material according to any one of claims 1 to 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. A bottom plate and a top plate are formed by folding a plate-shaped paper member into a roll shape and connecting the ends,
By forming a plurality of bent portions in a region connecting the bottom plate and the top plate, the bent portions are shared and the corners of the bottom plate and the top plate are abutted against each other, and line symmetry is achieved with the bent portions as an axis of symmetry; , form a triangle where the angles that meet each other are opposite apex angles ,
Method of manufacturing cushioning material. A bottom plate and a top plate are formed by folding a plate-shaped paper member into a roll shape and connecting the ends,
forming a rectangular area in a front view in a region connecting the bottom plate and the top plate;
In the rectangular area,
A mountain-fold bent portion in which one side connected to the bottom plate is mountain-folded, one side opposite to the one side and connected to the top plate is mountain-folded, and the mountain-fold is parallel to the one side and the opposite side. and,
By forming a plurality of bent portions, including a valley-folded bent portion that is inclined with respect to any of the mountain-folded bent portions and is valley-folded along the diagonal of the quadrangle,
forming a line-symmetrical triangular portion in the quadrangular region that shares the bent portion and has the bent portion as an axis of symmetry;
Method of manufacturing cushioning material.

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