JP2021160811A - Cushioning structure and packaging material with the same - Google Patents

Abstract

To provide a cushioning structure such that a cushioning position for a packaged object can be easily and precisely determined and assembly workability can be maintained, and a packaging material with the same.SOLUTION: A cushioning structure comprises one or more cushioning members which come into contact with a cushioning surface of a packaged object, and a flat plate-type retaining member which has a retaining part retaining the cushioning member at a predetermined position. The cushioning member is a polyhedron including a contact surface coming into contacting with the cushioning surface, an opposed surface facing the contact surface, and a first side face and a second side face, and has an engagement groove formed including a first engagement groove extending from the opposite surface to the contact surface, and a second engagement groove communicating with the first engagement groove and extending in a direction crossing the first engagement groove. The retaining part has a first insert piece raised substantially vertically from the retaining member, and a second insert piece extending substantially perpendicularly to the first insert piece. The first insert piece and second insert piece are inserted into the first engagement groove and second engagement groove respectively to retain the cushioning member for the retaining member.SELECTED DRAWING: Figure 8

Description

The present invention relates to a buffer structure arranged in a gap between a packaging box and an object to be packed stored in the packaging box, and a packaging material provided with the buffer structure.

Conventionally, when packing an object to be packed using a packaging box, a cushioning material that absorbs an external impact or vibration is arranged in a gap between the object to be packed and the packaging box. Such a cushioning material needs to be positioned at a position where it is desired to cushion the impact according to the outer shape of the packaged object. However, when trying to achieve both the buffering force and the positioning function with one member, it is often difficult to change the buffering force and the buffering position due to design restrictions.

Therefore, a method for easily positioning the cushioning material has been proposed. For example, in Patent Document 1, in a cushioning material formed by combining a corrugated cardboard or a plate material and a cushioning block, a slit through which the corrugated cardboard plate enters the body is cut. It consists of a cushioning block and a plate-shaped corrugated cardboard with a through hole that allows the cushioning block to enter with the slit parallel to the plate surface. A cushioning material to be locked is disclosed.

Japanese Unexamined Patent Publication No. 2005-22717

In the cushioning material of Patent Document 1, a part of the cushioning block projects to the outside of the corrugated cardboard or the plate material in a state where the cushioning block is inserted into the through hole of the corrugated cardboard or the plate material and the slit is locked to the edge of the through hole. Therefore, there is a problem that the outer box is caught in the protruding portion of the cushioning material when the outer box is covered with the cushioning material attached to the packaged object.

In view of the above problems, it is an object of the present invention to provide a buffer structure capable of easily and accurately positioning a buffer position with respect to an object to be packed and maintaining assembly workability, and a packaging material provided with the buffer structure. And.

In order to achieve the above object, the first configuration of the present invention is a buffer structure that is arranged between the packaging box and the packaged object stored in the packaging box and cushions the impact applied to the packaged object. .. The cushioning structure includes one or more cushioning members that come into contact with the cushioning surface of the packaged object, and a holding member having a holding portion that detachably holds the cushioning member in a predetermined position. The cushioning member is a polyhedron including a contact surface in contact with the cushioning surface, a facing surface facing the contact surface, a first side surface intersecting the contact surface and the facing surface, and a second side surface facing the first side surface. be. The cushioning member extends in a direction in which a first engaging groove extends from the facing surface toward the contact surface so as to cross the facing surface, and the first engaging groove communicates with the first engaging groove and intersects the first engaging groove. , A second engaging groove penetrating from the first side surface to the second side surface, and an engaging groove including the second engaging groove are formed. The holding portion is cut up from a predetermined position of the holding member along the first fold line and the first U-shaped cut line in a plan view, and the first insertion that stands up substantially vertically from the holding member via the first fold line. It has a piece and a second insert piece extending substantially perpendicular to the first insert piece via a second fold line parallel to the first fold line. By inserting the first insertion piece and the second insertion piece into the first engagement groove and the second engagement groove, respectively, the cushioning member is held against the holding member.

According to the first configuration of the present invention, the holding member is formed by inserting the first insertion piece and the second insertion piece of the holding portion into the first engaging groove and the second engaging groove formed in the cushioning member. On the other hand, the movement of the cushioning member in the vertical direction and the inward / outward direction can be restricted. Therefore, since the cushioning member is difficult to move due to vibration, impact, or the like during transportation, the cushioning position of the cushioning member with respect to the packaged object can be accurately positioned. In addition, the holding part has a simple structure that is simply cut up from the holding member and assembled, and does not require a separate member for holding the cushioning member. Therefore, the structure of the cushioning structure is simplified, the number of members is reduced, and packaging is performed. The cost of the material can be reduced and the assembly workability can be maintained. Further, since the cushioning member does not protrude from the outer surface of the holding member, there is no possibility that the upper box is caught in the protruding portion of the cushioning member when the cushioning structure is attached to the packaged object and the upper box is covered.

An exploded perspective view of the packaging material 100 using the buffer structure 7b of the present invention. Side sectional view of the stopper 10 used for the packaging box 1 before use as viewed from a direction perpendicular to the first hinge portions 18a and 18b. Perspective view of the state in which the key member 15 of the stopper 10 is inserted into the tubular portion 16 as viewed from the flange portion 17 side. A perspective view showing a state in which the lower cushioning material 7a and the cushioning structure 7b are arranged around the product 4. Perspective view of the cushioning member 33 constituting the cushioning structure 7b according to the first embodiment of the present invention. The plan view which shows the state before assembling the holding part 37 of the holding member 31 which constitutes the cushioning structure 7b of 1st Embodiment. A perspective view showing a state in which the holding portion 37 of the holding member 31 constituting the buffer structure 7b of the first embodiment is assembled. A perspective view showing how the holding portion 37 assembled in the state of FIG. 7 is inserted into the engaging groove 35 of the cushioning member 33 from the second engaging piece 43 side. A perspective view of a state in which the holding portion 37 has been inserted into the cushioning member 33 as viewed from the second side surface 33d side. A perspective view showing a state in which the bent state of the second engaging piece 43 is restored from the state of FIG. Perspective view of the cushioning member 33 held by the holding portion 37 of the holding member 31 as viewed from the inside. Perspective view of the cushioning member 33 held by the holding portion 37 of the holding member 31 as viewed from the outside. Top view showing the state before assembling the holding part 37 of the holding member 31 constituting the cushioning structure 7b which concerns on 2nd Embodiment of this invention. A perspective view showing a state in which the holding portion 37 of the holding member 31 constituting the buffer structure 7b of the second embodiment is assembled. A perspective view showing how the holding portion 37 assembled in the state of FIG. 14 is inserted into the engaging groove 35 of the cushioning member 33 from the second engaging piece 43 side.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a packaging material 100 using the buffer structure 7b of the present invention. The packaging material 100 includes a packaging box 1, a lower cushioning material 7a and a cushioning structure 7b (both of which are referred to in FIG. 4) arranged in the packaging box 1. The packaging box 1 is composed of a pallet 2 with a tray and an upper box 3.

The pallet 2 with a tray includes a tray 5 composed of a bottom surface 5a on which the product 4 (packed object) and the lower cushioning material 7a (both of which see FIG. 4) are placed, and a side wall 5b erected on the peripheral edge of the bottom surface 5a. It has a pallet 6 fixed to the lower surface of the tray 5. An oval-shaped first through hole 8a is formed in the central portion of each side wall 5b of the tray 5.

The upper box 3 has a square cylindrical shape with an open bottom surface covering the sides and the upper side of the product 4, and the top surface 3b is formed by closing the four flaps connected to the side plate 3a. A second through hole 8b is formed at a position overlapping the first through hole 8a of the tray-equipped pallet 2 at the lower portion of each side plate 3a of the upper box 3. The pallet with tray 2 and the upper box 3 are connected by inserting the stopper 10 (see FIG. 2) in a state where the first through holes 8a and 8b are overlapped.

The pallet 6 is composed of, for example, a plurality of support columns 6a formed by laminating corrugated cardboard sheets, and a top plate (not shown) and a bottom plate 6b fixed to the upper and lower surfaces of each support column 6a. An arm insertion hole 9 for inserting an arm of a forklift or a hand pallet (pallet transport trolley) is formed between them.

FIG. 2 is a side sectional view of the stopper 10 used for the packaging box 1 as viewed from a direction perpendicular to the first hinge portions 18a and 18b. FIG. 3 is a perspective view of the state in which the key member 15 of the stopper 10 is inserted into the tubular portion 16 as viewed from the flange portion 17 side (outside of the packaging box 1).

As shown in FIGS. 2 and 3, the stopper 10 is composed of a base member 14 and a key member 15 that is foldably connected to the base member 14. The base member 14 can be rotated via the first hinge portions 18a and 18b on the cylindrical portion 16, the flange portion 17 provided at one end of the tubular portion 16, and the opposing inner surfaces of the tubular portion 16. It has a pair of hook members 19a and 19b connected to each other. The hook members 19a and 19b are bent in an L-shape in cross section with the first hinge portions 18a and 18b as base ends, respectively, and the tip portions protrude from the tubular portion 16.

The key member 15 has a push-open portion 25 having an outer dimension substantially the same as the inner dimension of the tubular portion 16. By bending the key member 15 along the second hinge portion 24 and folding it back toward the base member 14, the push-open portion 25 comes into contact with the hook members 19a and 19b. Then, the push-open portion 25 is inserted into the tubular portion 16 from the flange portion 17 side of the base member 14. As a result, the hook members 19a and 19b are pressed by the push-open portion 25, and the hook members 19a and 19b are outside the cylindrical portion 16 with the first hinge portions 18a and 18b as rotation axes (in the direction of the arrow in FIG. 2). Rotates to.

As shown in FIG. 3, when the key member 15 is completely inserted into the base portion 14 (cylindrical portion 16), the tips of the hook members 19a and 19b pressed by the push-opening portion 25 are tubular portions. It protrudes from 16 substantially parallel to the flange portion 17. As a result, the side wall 5b of the tray-equipped pallet 2 and the upper box 3 are sandwiched by the flange portion 17 and the hook members 19a and 19b.

FIG. 4 is a perspective view showing a state in which the lower cushioning material 7a and the cushioning structure 7b are arranged around the product 4. In FIG. 4, the description of the pallet with tray 2 and the upper box 3 is omitted. The lower cushioning material 7a is arranged at the four corners of the lower end portion of the product 4, and protects the lower portion of the product 4 from an external impact.

The buffer structure 7b is arranged along the left side surface and the right side surface from the upper surface of the product 4 to protect the left side surface and the right side surface of the product 4 from external impact. The buffer structure 7b has a holding member 31 and a buffer member 33. The holding member 31 is formed by bending a single corrugated cardboard sheet. The holding member 31 has an upper surface portion 31a facing the upper surface of the product 4 and three side surface portions 31b adjacent to the upper surface portion 31a (two side surface portions 31b are visible in FIG. 4). The cushioning member 33 is held at one or more of the three side surface portions 31b of the holding member 31 facing the side surface of the product 4 (four locations are visible in FIG. 4).

A procedure for packing the product 4 using the packaging box 1 shown in FIG. 1 will be described. First, the product 4 is placed on the bottom surface 5a of the pallet 2 with a tray. Next, the lower cushioning material 7a and the cushioning structure 7b are attached to the lower and side surfaces of the product 4, the upper box 3 is covered, and then each side wall 5b of the tray-equipped pallet 2 is erected. Finally, the base portion 14 of the stopper 10 is inserted with the first through hole 8a of the side wall 5b and the second through hole 8b of the upper box 3 overlapped, and the push-open portion 25 is inserted inside the tubular portion 16. By doing so, the pallet 2 with a tray and the upper box 3 are integrally connected.

When unpacking the packaging box 1, the push-opening portion 25 is pulled out from the tubular portion 16 by pushing up the key member 15 of the stopper 10 from the state shown in FIG. Along with the pulling-out operation of the push-open portion 25, the hook members 19a and 19b that were pressed by the push-open portion 25 and rotated outward are rotated inward by the restoring force of the first hinge portion 18, and the state shown in FIG. Return to. Finally, the base portion 14 is pulled out from the first through holes 8a and 8b to release the connection between the side wall 5b of the tray-equipped pallet 2 and the upper box 3.

FIG. 5 is a perspective view of the cushioning member 33 constituting the cushioning structure 7b according to the first embodiment of the present invention as viewed from the holding member 31 side. The cushioning member 33 is formed in a rectangular parallelepiped shape by EPE (foamed polyethylene). As the material of the cushioning member 33, in addition to EPE, a foamable resin such as styrofoam or urethane, or a laminated corrugated cardboard formed by laminating a plurality of corrugated cardboard sheets is used.

The cushioning member 33 includes a contact surface 33a that contacts the exterior surface (buffer surface) of the product 4, a facing surface 33b that faces the contact surface 33a, and a first side surface 33c that intersects the contact surface 33a and the facing surface 33b. It has a second side surface 33d facing the first side surface. The cushioning member 33 is formed with an engaging groove 35 that penetrates from the first side surface 33c to the second side surface 33d so as to cross the facing surface 33b. The engaging groove 35 has a first engaging groove 35a extending from the facing surface 33b toward the contact surface 33a, and a first engaging groove 35a communicating with the first engaging groove 35a and extending in a direction orthogonal to the first engaging groove 35a. It has an L-shape when viewed from the side, which is composed of two engaging grooves 35b.

FIG. 6 is a plan view showing a state before assembling the holding portion 37 of the holding member 31 constituting the buffer structure 7b of the first embodiment. The holding portion 37 is formed at a predetermined position of the holding member 31, and has a first insertion piece 40, a second insertion piece 41, a first engaging piece 42, and a second engaging piece 43.

The first insertion piece 40 is surrounded by a first fold line L1 and a U-shaped cut line C1 in a plan view, and is connected to the holding member 31 via the first fold line L1. The second insertion piece 41 is a pair of a second fold line L2 parallel to the first fold line L1 and a pair extending vertically from the portion of the first cut line C1 facing the second fold line L2 toward the second fold line L2. It is surrounded by the second cutting line C2 of the above, and is connected to the first insertion piece 40 via the second folding line L2. A first engaging piece 42 and a second engaging piece 43 are formed at both ends of the second insertion piece 41 in the longitudinal direction with the second cutting line C2 interposed therebetween. The second folding line L2 extends between the first insertion piece 40 and the second engaging piece 43.

The distance d1 between the first fold line L1 and the second fold line L2 is substantially equal to the depth w1 (see FIG. 5) of the first engagement groove 35a of the cushioning member 33. The distance d2 between the second folding line L2 and the tips of the second insertion piece 41, the first engaging piece 42, and the second engaging piece 43 is the depth w2 of the second engaging groove 35b of the cushioning member 33 (FIG. 5) is almost equal to. The distance d3 (distance between the first engaging piece 42 and the second engaging piece 43, which will be described later) between the pair of second cutting lines C2 is the width from the first side surface 33c to the second side surface 33d of the cushioning member 33. It is substantially equal to w3 (see FIG. 5).

Next, a method of assembling the buffer structure 7b of the present embodiment will be described. First, from the state of FIG. 6, the first insertion piece 40 is cut up along the first cutting line C1 and bent substantially vertically inside the holding member 31 along the first folding line L1. Next, the second insertion piece 41 and the second engaging piece 43 are cut up along the pair of second cutting lines C2 and bent substantially perpendicular to the first insertion piece 40 along the second folding line L2.

FIG. 7 is a perspective view showing a state in which the holding portion 37 of the holding member 31 constituting the buffer structure 7b of the first embodiment is assembled. The holding member 31 extends so as to cover the side surface of the product 4 as shown in FIG. 4, but it is for convenience of explanation in FIG. 7 and FIGS. 8 to 11, 14, and 15 which will be described later. Therefore, only a part of the holding member 31 is described in a rectangular shape.

As shown in FIG. 7, the first insertion piece 40 stands up substantially vertically from the holding member 31 via the first folding line L1. The second insertion piece 41 extends from the first insertion piece 40 via the second folding line L2 substantially parallel to the holding member 31, that is, substantially perpendicular to the first insertion piece 40. The second engaging piece 43 is adjacent to the downstream side of the second insertion piece 41 with respect to the insertion direction into the second engaging groove 35b (the direction of the arrow in FIG. 8), and is a holding member via the second folding line L2. It extends substantially parallel to 31, that is, approximately perpendicular to the first insertion piece 40. Further, by bending the second insertion piece 41, the first engagement piece 42 stands up at the end of the first insertion piece 40 opposite to the second engagement piece 43.

Next, the second engaging piece 43 side of the holding portion 37 assembled in the state of FIG. 7 is inserted into the engaging groove 35 from the first side surface 33c side of the cushioning member 33 as shown in FIG. More specifically, the first insertion piece 40 is inserted into the first engagement groove 35a, and the second engagement piece 43 and the second insertion piece 41 are inserted into the second engagement groove 35b, respectively. Then, when the first engaging piece 42 comes into contact with the first side surface 33c, the insertion operation ends.

FIG. 9 is a perspective view of a state in which the holding portion 37 has been inserted into the cushioning member 33 as viewed from the second side surface 33d side. As shown in FIG. 9, the second engaging piece 43 projects outward from the second side surface 33d of the cushioning member 33. From this state, the second engaging piece 43 that has been bent along the second fold line L2 is cut up along the second cut line C2, and the bent state at the second fold line L2 is restored.

FIG. 10 is a perspective view showing a state in which the bent state of the second engaging piece 43 is restored from the state of FIG. As shown in FIG. 10, since the second engaging piece 43 is substantially perpendicular to the second engaging groove 35b on the second side surface 33d side, the holding portion 37 is drawn in the pulling direction (first side surface 33c direction). Movement is restricted. On the other hand, on the first side surface 33c side, the first engaging piece 42 is substantially perpendicular to the second engaging groove 35b, so that the movement of the holding portion 37 in the insertion direction (second side surface 33d direction) is restricted. Will be done.

11 and 12 are perspective views of the cushioning member 33 attached to the holding portion 37 of the holding member 31 as viewed from the inside (product 4 side) and the outside (upper box 3 side), respectively. The cushioning member 33 is restricted from moving in the left-right direction (arrow X direction in FIG. 11) by the first engaging piece 42 and the second engaging piece 43. Further, the second insertion piece 41 (see FIG. 10) inserted into the second engagement groove 35b moves the cushioning member 33 in the vertical direction (arrow Y direction in FIG. 11) and inward / outward direction (arrow Z direction in FIG. 11). Movement is restricted.

Therefore, since the cushioning member 33 does not move due to vibration, impact, or the like during transportation, the buffering position of the cushioning member 33 with respect to the product 4 can be accurately positioned. Further, since the holding portion 37 has a simple structure that is simply cut up from the holding member 31 and assembled, the structure of the buffer structure 7b can be simplified and the assembling workability can be maintained. Further, since a separate member for fixing the cushioning member 33 is not required, the number of members can be reduced and the cost of the packaging material can be reduced.

When the cushioning structure 7b is discarded, as shown in FIG. 9, the second engaging piece 43 is bent again at the second folding line L2 and the cushioning member 33 is pulled out from the first side surface 33c side to form the holding member 31. The cushioning member 33 can be easily separated. Therefore, when the materials of the holding member 31 and the cushioning member 33 are different, the separate disposal becomes easy and the recyclability is improved.

Further, as shown in FIG. 12, since the cushioning member 33 does not protrude from the outer surface of the holding member 31, the upper box 3 is attached to the cushioning member 33 when the cushioning structure 7b is attached to the product 4 and the upper box 3 is covered with the product 4. There is no risk of getting caught in the protruding part.

Further, since the cushioning structure 7b is composed of the holding member 31 and the cushioning member 33 that is detachably attached to the holding portion 37 of the holding member 31, the position of the holding portion 37 formed on the holding member 31 can be determined. By changing the contact position (buffer position) of the cushioning member 33 with respect to the product 4, the contact position (buffering position) can be arbitrarily adjusted. The position of the holding portion 37 can be easily changed by changing the die for punching the corrugated cardboard sheet forming the holding member 31.

FIG. 13 is a plan view showing a state before assembling the holding portion 37 of the holding member 31 constituting the buffer structure 7b according to the second embodiment of the present invention. In the present embodiment, the holding portion 37 has a third insertion piece 45 in addition to the first insertion piece 40, the second insertion piece 41, the first engagement piece 42, and the second engagement piece 43. The third insertion piece 45 is surrounded by a third cutting line C3 having a U-shape in a plan view, and overlaps the first insertion piece 40 on the opposite side of the second folding line L2 from the second insertion piece 41. Is formed in. Further, the second folding line L2 is not formed between the second insertion piece 41 and the third insertion piece 45. The configuration of the other portion of the holding portion 37 is the same as that of the first embodiment shown in FIG.

FIG. 14 is a perspective view showing a state in which the holding portion 37 of the holding member 31 constituting the buffer structure 7b of the second embodiment is assembled. As shown in FIG. 14, by bending the second insertion piece 41 along the second folding line L2, the third insertion piece 45 is cut and raised from the first insertion piece 40 along the third cutting line C3.

FIG. 15 is a perspective view showing how the holding portion 37 assembled in the state of FIG. 14 is inserted into the engaging groove 35 of the cushioning member 33 from the side of the second engaging piece 43. The engaging groove 35 formed in the cushioning member 33 communicates with the first engaging groove 35a extending from the facing surface 33b toward the contact surface 33a and the first engaging groove 35a, and is orthogonal to the first engaging groove 35a. A side view T-shape composed of a second engaging groove 35b extending in the direction of the first engaging groove and a third engaging groove 35c extending from the first engaging groove 35a to the opposite side of the second engaging groove 35b. It is in the shape.

The second engaging piece 43 side of the holding portion 37 assembled in the state of FIG. 14 is inserted into the engaging groove 35 from the first side surface 33c side of the cushioning member 33 as shown in FIG. More specifically, the first insertion piece 40 is in the first engagement groove 35a, the second engagement piece 43 and the second insertion piece 41 are in the second engagement groove 35b, and the third insertion piece 45 is in the third engagement groove 35b. Each is inserted into the groove 35c. Then, when the first engaging piece 42 comes into contact with the first side surface 33c, the insertion operation ends.

In the configuration of the first embodiment, when a force is applied in the direction of lifting and rotating the upper and lower ends of the cushioning member 33 (directions of arrows R and R'in FIG. 15), the first insertion piece 40 and the second insertion piece 40 41 may come off from the first engaging groove 35a and the second engaging groove 35b, respectively, and the cushioning member 33 may fall off from the holding member 31. In particular, when the cushioning member 33 is made of a soft material such as EPE, there is a high possibility that the cushioning member 33 will fall off.

In the present embodiment, the third insertion piece 45 of the holding portion 37 is inserted into the third engaging groove 35c of the cushioning member 33, so that a force in the rotational direction (arrows R, R'direction) is applied to the cushioning member 33. When this is done, the third insertion piece 45 serves as a retaining (regulatory part). Therefore, even when the cushioning member 33 is made of a soft material, it is possible to prevent the cushioning member 33 from falling off from the holding member 31.

Others The present invention is not limited to each of the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in each of the above embodiments, the buffer structure 7b used for the packaging box 1 using the pallet 2 with a tray composed of the tray 5 and the pallet 6 has been described, but the buffer structure 7b of the present invention is provided with the pallet 6. The same applies to C-type packaging boxes consisting of only the upper box 3 and tray 5, and A-type and B-type packaging boxes in which the upper box and tray (bottom surface) are integrated. Of course.

The present invention can be used for a buffer structure arranged in a gap between a packaged object and a packaging box for packaging the packaged object. By utilizing the present invention, it is possible to provide a buffer structure in which the cushioning position and cushioning force with respect to the object to be packed can be easily changed and the assembly workability can be maintained, and a packaging material provided with the buffer structure.

1 Packaging box 2 Pallet with tray 3 Upper box 4 Product (packed item)
4a Exterior surface (buffer surface)
7a Lower cushioning material 7b Cushioning structure 31 Holding member 33 Cushioning member 33a Contact surface 33b Opposing surface 33c First side surface 33d Second side surface 35 Engagement groove 35a First engagement groove 35b Second engagement groove 35c Third engagement groove 37 Holding part 40 1st insertion piece 41 2nd insertion piece 42 1st engagement piece 43 2nd engagement piece 45 3rd insertion piece 100 Packaging material L1 1st fold line L2 2nd fold line C1 1st cut line C2, C3 2nd cut line C4 3rd cut line

Claims (7)

It is a buffer structure that is arranged between the packaging box and the packaged object stored in the packaging box and cushions the impact applied to the packaged object.
The buffer structure is
One or more cushioning members that come into contact with the cushioning surface of the packaged object,
A flat plate-shaped holding member having a holding portion that detachably holds the cushioning member in a predetermined position,
With
The cushioning member includes a contact surface that contacts the cushioning surface, a facing surface that faces the contact surface, a first side surface that intersects the contact surface and the facing surface, and a second side surface that faces the first side surface. And is a polyhedron including
A first engaging groove extending from the facing surface toward the contact surface so as to cross the facing surface,
A second engaging groove that communicates with the first engaging groove and extends in a direction intersecting the first engaging groove and penetrates from the first side surface to the second side surface.
Engagement groove is formed including
The holding portion is cut up from a predetermined position of the holding member along the first folding line and the first U-shaped cut line in a plan view.
A first insertion piece that stands up substantially vertically from the holding member via the first folding line,
A second insert piece extending substantially perpendicular to the first insert piece via a second fold line parallel to the first fold line,
Have,
A buffer characterized by holding the cushioning member with respect to the holding member by inserting the first insertion piece and the second insertion piece into the first engaging groove and the second engaging groove, respectively. Structure. The holding portion has a pair of second cut lines extending from a portion of the first cut line facing the second fold line toward the second fold line, and the second insertion piece is a pair of the above. It is formed by bending along the second fold line between the second cut lines.
On the upstream side and the downstream side of the second insertion piece with respect to the insertion direction into the second engagement groove, the first engagement piece and the first engagement piece extending along the first insertion piece from the second folding line, respectively. A second engagement piece is formed and
With the first insertion piece inserted into the first engaging groove and the second insertion piece and the third insertion piece inserted into the second engaging groove, the first engaging piece and the second engaging piece are inserted, respectively. The cushioning structure according to claim 1, wherein the first side surface and the second side surface project outwards to restrict the movement of the cushioning member in the insertion direction. 2. The second aspect of the present invention is characterized in that the distance between the first engaging piece and the second engaging piece of the holding portion is substantially equal to the width from the first side surface to the second side surface of the cushioning member. The buffer structure described. The cushioning member is
With the first engaging groove and the second engaging groove,
A third engaging groove that communicates with the first engaging groove, extends parallel to the facing surface on the side opposite to the second engaging groove, and penetrates from the first side surface to the second side surface.
The engaging groove composed of is formed.
The holding portion is cut and raised between the pair of the second cut lines along the plan-view U-shaped third cut line formed from the second fold line toward the first fold line. It has a third insert that extends substantially perpendicular to the first insert on the opposite side of the second insert.
By inserting the first insertion piece, the second insertion piece, and the third insertion piece into the first engagement groove, the second engagement groove, and the third engagement groove, respectively, the holding member is inserted. The cushioning structure according to any one of claims 1 to 3, wherein the cushioning member is held. The holding member is formed by bending one plate-shaped member, and has an upper surface portion facing the upper surface of the packaged object and three side surface portions adjacent to the upper surface portion.
The buffer structure according to any one of claims 1 to 4, wherein the holding portion is provided on the side surface portion. With the packaging box
The buffer structure according to any one of claims 1 to 5.
Packaging material with. The packaging material according to claim 6, wherein the packaging box has an upper box that covers the packaged object to which the buffer structure is mounted from above.

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