JP6905624B2 - Cushioning material and packaging container structure - Google Patents

Description

The present embodiment relates to a cushioning material.

Conventionally, as a method of packing a transported object that requires careful handling, a cushioning material that absorbs shocks and vibrations from the outside during transport is used between an outer box such as a cardboard case and the packaged object (conveyed object). The method of arranging is common. As the cushioning material, a plate-shaped cushioning material that covers the entire surface of the packaged object or the like is used. However, the packaged object has a part where the external force is sufficiently buffered and a part where the buffering is not required so much.

Japanese Unexamined Patent Publication No. 2014-234215

An embodiment is to provide a cushioning material that can sufficiently buffer an external force and can suppress the amount of use.

A thick-walled first portion and a thick-walled second portion integrated with respect to the first portion in a state of being displaced in the thickness direction of the first portion are provided, and a groove is provided in the first portion. It is provided so as to open in the space facing the displaced end face of the portion, and among the surfaces in the wall thickness direction in the second portion, the surface facing the space facing the displaced end face of the first portion is defined as the support surface. A cushioning material characterized by.

The exploded perspective view which shows typically the packaging container structure which concerns on 1st Embodiment. (a) is a schematic perspective view of the cushioning material according to the first embodiment, and (b) is a schematic perspective view of the cushioning material according to the first embodiment as viewed from below. The perspective view which shows the state in which the packaging container equipped with the cushioning material which concerns on 1st Embodiment stores the packed object. The graph which shows the dynamic impact characteristic curve of a cushioning material. The exploded perspective view which shows typically the packaging container structure which concerns on 2nd Embodiment. (a) is a schematic perspective view of the cushioning material according to the second embodiment, and (b) is a schematic perspective view from the lower side of the cushioning material according to the first embodiment. The perspective view which shows the state in which the packaging container equipped with the cushioning material which concerns on 2nd Embodiment stores the packaged object.

(First Embodiment)
Hereinafter, embodiments will be described with reference to the drawings. In each drawing, similar components are designated by the same reference numerals and detailed description thereof will be omitted as appropriate.

The cushioning material according to the first embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is an exploded perspective view schematically showing a packaging container structure according to the first embodiment. FIG. 2A is a schematic perspective view of the cushioning material according to the first embodiment, and FIG. 2B is a view from below of the cushioning material according to the first embodiment. FIG. 3 is a perspective view showing a state in which a packaging container equipped with a cushioning material according to the first embodiment stores an object to be packed. FIG. 4 is a graph showing a dynamic impact characteristic curve of the cushioning material.

As shown in FIG. 1, the cushioning material 11 according to the first embodiment is in contact with the side surface of the packaged object 17, which requires careful handling of, for example, an electronic device or a television, and is made of, for example, urethane, polyethylene, or styrofoam. The cushioning material 11 is attached to the packaging container 12, and the object to be packed 17 is stored by the packaging container 12. The packed object 17 is packed inside an outer box 20 such as a corrugated cardboard case with the cushioning material 11 in contact with the side surface of the packed object 17. In this way, the cushioning material 11 is arranged between the packaging container 12 and the packaged object 17 so as not to directly apply an external force such as an impact to the transported object. In this packed state, the cushioning material 11 cushions the impact on the packaged object 17 by the elasticity of the first portion 1, the second portion 2, and the third portion 3.

First, the structure of the cushioning material 11 in the first embodiment will be described.

As shown in FIGS. 2A and 2B, the cushioning material 11 is arranged at right angles to the first portion 1, the second portion 2 integrated with the first portion 1, and the second portion 2. It has a third part 3 that has been made.

As shown in FIG. 2A, the first portion 1 having the first surface 4 has a first thickness T1 along the Z direction as the first direction and a first thickness T1 along the Y direction as the third direction. It has a width W1 of 1 and a first length L1 along the X direction as the second direction. In the present embodiment, a relatively thick structure may be described as being thick or thick.

The second portion 2 is arranged in a state of being displaced in the Z direction with respect to the first portion 1, and is integrated with the first portion 1 along the X direction. The second width W2 along the Y direction of the second portion 2 has the same width as the first width W1 of the first portion 1. The thickness of the second portion 2 along the Z direction has a second thickness T2. The length of the second portion 2 along the X direction has a second length L2. The thickness, width, and length of the first portion 1 and the second portion 2 are redesigned according to the permissible range in which the packaged object can withstand the maximum deceleration (G).

When the first portion 1 is integrated with the second portion 2 in a state of being displaced in the Z direction, a step is generated between the first portion 1 and the second portion 2. Due to this step, the first portion 1 side has a third surface 6 which is a displaced end surface, and the second portion 2 side also has a displaced end surface.

The third surface 6 is in contact with the packaged object 17 and has a role of cushioning the impact that the packaged object 17 receives from the outside. Further, the third surface 6 has a role as a support surface for the packaged object 17 in the X direction.

The second portion 2 extends along the X direction and has a second surface 5 parallel to the first surface 4. That is, among the surfaces of the second portion 2 perpendicular to the Z direction, the surface having a continuous surface while being orthogonal to the surface of the third surface 6 is the second surface 5. Of the surfaces in the Z direction of the second portion 2, the surface facing the second portion 2 with respect to the space facing the third surface 6 is the second surface 5 and serves as a support surface. Further, the second portion 2 has a role of alleviating the impact received from the outside on the bottom surface or the upper surface of the packaged object 17. The thickness of the second portion 2 in the Z direction has a second thickness T2 that is thinner than that of the first portion 1. This is because the bottom surface or the upper surface of the packaged object 17 has a certain degree of strength with respect to the front surface and therefore does not require as much cushioning action as the front surface. In the first embodiment, the thickness of the second portion 2 in the Z direction is described as having a second thickness T2 that is thinner than the first portion 1, but the thickness of the first portion 1 and the second portion 2 May be the same, or the second portion 2 may be thicker than the first portion 1.

The first groove 9 is provided in the first portion 1.

The first groove 9 provided in the first portion 1 reaches the inside of the first portion 1 from the surface opposite to the first surface 4. The first groove 9 has a certain width and extends along the Y direction to penetrate the first portion 1. In other words, the first groove 9 is provided so as to open in the space facing the displaced end face of the second portion 2. One end inside the first portion 1 has a width larger than the width of the first groove 9, for example, a first hole 9a having a circular cross section having a diameter larger than the width of the first groove 9. Extends in the Y direction along the first groove 9 as one end inside the first portion 1 of the first groove 9. In the first groove 9, the first portion 1 fits into each corner peripheral wall of the packaging container 12, and the end of the corner peripheral wall is located in the first hole 9a. The first hole 9a has a role of suppressing damage to the cushioning material 11 due to stress concentration due to pulling or twisting. The third portion 3 having the fourth surface 7 parallel to the first surface 4 is arranged with respect to the second portion 2 in a direction perpendicular to the direction in which the first portion 1 is arranged with respect to the second portion 2. There is. Similar to the first part 1, the third part 3 is arranged in a state where the second part 2 is displaced in the Z direction with respect to the third part 3, and the third part 3 and the second part 2 are integrated. There is. Due to this structure, a step is generated between the third portion 3 and the second portion 2. Due to this step, the third portion 3 has a fifth surface 8 and the second portion 2 has an offset end surface. The third portion 3 and the second portion 2 are connected so that the surface of the fifth surface 8 and the second surface 5 are continuous. The third portion 3 has a third width W3 along the X direction. The third width W3 has the same width as the first portion 1 first width W1. The cushioning material 11 is formed by cutting out the first portion 1, the second portion 2, and the third portion from one plate material. Therefore, the first width W1, the second width W2, and the third width W3 have the same length. The cushioning material 11 is formed by integrally and continuously forming the first portion 1 and the second portion 2, and connecting the third portion 3 to the second portion 2.

The fifth surface 8 is in contact with the packaged object 17 and has a role of cushioning the impact that the packaged object 17 receives from the outside. At this time, the fifth surface 8 is in contact with a surface whose third surface 6 is orthogonal to the surface with which the packaged object 17 is in contact. For example, when the third surface 6 is in contact with the front surface of the packaged object 17, the fifth surface 8 is in contact with the side surface of the packaged object 17.

A second groove 10 is provided in the third portion 3. The second groove 10 has a constant width and extends in the X direction. The second groove 10 provided in the third portion 3 is orthogonal to the first groove 9 provided in the first portion 1. Further, the second groove 10 provided in the third portion 3 reaches the inside of the third portion 3 from the surface opposite to the fourth surface 7. The second groove 10 has a constant width and extends along the X direction to penetrate the third portion 3. One end inside the third portion 3 has a width larger than the width of the second groove 10, for example, a second hole 10a having a circular cross section having a diameter larger than the width of the second groove 10. Extends in the X direction along the second groove 10 as one end inside the third portion 3 of the second groove 10. In the second groove 10, the third portion 3 fits into each corner peripheral wall of the packaging container 12, and the end of the corner peripheral wall is located in the second hole 10a. The second hole 10a has a role of suppressing damage to the cushioning material 11 due to stress concentration due to pulling or twisting. The third portion 3 can also be regarded as the second first portion 1 by considering that the first portion 1 is arranged at a right angle with the second portion as the center.

In the first embodiment, when the first portion 1 buffers the impact on the front surface of the packaged object 17, the third portion 3 cushions the impact on the side surface of the packaged object 17, but the packaged object 17 is described. Depending on the arrangement direction of, the third portion 3 may cushion the impact on the front surface.

Next, a case where the cushioning material 11 is used for the packaging container 12 will be described.

As shown in FIG. 1, the cushioning material 11 is attached to the packaging container 12 that stores the object to be packed 17. The cushioning material 11 is in contact with the side surface and the lower surface of the packaged object 17. Here, the case where the cushioning material 11 is used on the bottom surface of the packaged object 17 will be described, but the same applies to the upper surface. In the first embodiment, the side of the packaging container 12 in which the object to be packed 17 is stored will be described as the inside of the packaging container 12.

A recess 13 is provided in the peripheral wall of each corner of the packaging container 12, and an opening 14 is provided in the bottom.

The first groove 9 provided in the first portion 1 and the second groove 10 provided in the third portion 3 fit into the corner peripheral wall in the recess 13 of the corner peripheral wall of the packaging container 12, thereby fitting the packaging container 12 into the corner peripheral wall. It is fixed to the peripheral wall of the corner. Since the third portion 3 is arranged in the second portion 2 so as to extend in the direction perpendicular to the extending direction of the second portion 2 or the first portion 1, the first portion 1 and the third portion 3 are corner portions. The position of the cushioning material 11 is determined by fitting it into the peripheral wall. As a result, the cushioning material 11 is arranged so as to come into contact with the surface of the packaged object 17 whose impact is desired to be cushioned. That is, the third surface 6 and the fifth surface 8 are in contact with the packaged object 17.

By fitting the first groove 9 of the first portion 1 and the second groove 10 of the third portion 3 into the peripheral wall of the packaging container 12 in the recess 13, the first hole 9a to the first surface 4 of the first portion 1 are fitted. The peripheral wall of the packaging container 12 is in contact with the side surface 1b, and the peripheral wall of the packaging container 12 is in contact with the side surface 3b from the second hole 10a to the fourth surface 7 of the third portion 3. In this way, the holding force is dispersed by increasing the surface of the cushioning material 11 in contact with the packaging container 12, so that damage to the cushioning material 11 can be suppressed.

The second portion 2 projects from the inside to the outside of the packaging container 12 through the opening 14. The second portion 2 is held in the packaging container 12 by fitting into the opening 14 provided at the bottom of the packaging container 12. As a result, even when an external force is received from the lateral direction, the first portion 1 and the third portion 3 can be maintained in a state of being fixed to the corner peripheral wall. Therefore, it is possible to prevent the cushioning material 11 that has buffered the impact of the packaged object 17 at the predetermined position from being displaced from the predetermined position due to an external force. In the first embodiment, the second portion 2 may protrude from the opening 14 from the inside to the outside of the packaging container 12, or the second portion 2 and the outer surface of the bottom of the packaging container 12 may be flush with each other. good. The second surface 5 is in contact with the bottom surface of the packaged object 17.

When arranged as described above, the third surface 6 and the fifth surface 8 have a buffering action against an external force in the lateral direction by coming into contact with the packaged object 17, and the second surface 5 has a second surface 5 as described above. By supporting the packaged object 17, it has a buffering action against an external force from the bottom surface.

For example, when a semiconductor wafer is used as a transported object, the front surface of the semiconductor wafer, which is a disk, is vulnerable to impact, so it is particularly required to suppress damage due to impact or vibration during transport. On the other hand, since the side portion of the disk semiconductor wafer has a certain level of strength with respect to the front surface, damage due to impact or the like is unlikely to occur. Therefore, assuming that the surface corresponding to the front surface of the semiconductor wafer is the front surface of the packaged object 17, it is required to particularly relax the external force received by the front surface of the packaged object 17.

As shown in FIG. 4, the relationship between the maximum deceleration (G) and the static stress when the length of the cushioning material is changed is shown. Here, the calculation formula for the design of the cushioning material 11 is shown as follows, taking the first part 1 as an example.
K ＝ S / L

In the above equation, the length of the first portion 1 of the cushioning material 11 is L1, the area of the thickness T1 and the width W1 is S. The above equation shows that the larger K, the greater the impact on the object. The horizontal axis represents the product weight (M / SM: product weight) received by the packaged object 17 per unit area, and indicates a state in which the cushioning material is crushed toward the horizontal axis direction. That is, the area receiving the force is The larger the size, the more difficult it is to crush, and conversely, the smaller the area that receives the force or the heavier the mass of the product, the easier it is to crush. The length L of the cushioning material is shown. The length referred to here means, for example, the first length L1 of the first part 1.

If the cushioning material is completely crushed, the external force will be transmitted to the product as it is, so an appropriate length is required. Therefore, as shown in FIG. 4, when the value of the external force that the product can tolerate is 50 G, the cushioning material 11 is adjusted so as to have an area and a thickness smaller than the value of 50 G. In the example shown in FIG. 4, in the case of the length A (mm), the value below the value of 50 G is 0.03 to 0.4 (kgf / cm2). When the length is A (mm) in this way, the thickness and H of the cushioning material and the cross-sectional area S are adjusted according to the permissible range. This value depends on the material used for the cushioning material.

Next, the effect of the first embodiment will be described.

The cushioning material 11 of the first embodiment is provided with a first portion 1, a second portion 2 and a third portion 3, a first groove 9 is provided in the first portion 1, and a second groove 10 is provided in the third portion 3. There is. By providing the first groove 9 and the second groove 10, respectively, the cushioning material 11 can be attached to and fixed to the packaging container 12. When the cushioning material 11 is attached to the packaging container 12, the cushioning material 11 is brought into contact with the outer box 20 at the second portion 2 protruding to the outside of the packaging container 12. As a result, the cushioning material 11 protrudes from the packaging container 12 to form a gap between the object to be packed 17 and the outer box 20 via the packaging container 12. As a result, the impact on the packaged object 17 can be alleviated even if an external force is received. Further, when the outer box 20 is subjected to an impact such as falling over, the cushioning material 11 cushions the impact by the first portion 1, the second portion 2 and the third portion 3, and moves to the side surface of the packaged object 17. Mitigates the impact of. Even if the size of the cushioning material 11 is not increased, the impact acting on the packaged object 17 can be reliably cushioned. In the first embodiment, one of the four cushioning materials 11 attached to the corners of the upper surface of the packaged object 17 and the four cushioning materials 11 attached to the corners of the lower surface is provided on the lower surface. The cushioning material 11 has been described. The cushioning material 11 of the first embodiment can be similarly used not only on the lower surface side of the packaged object 17 but also on the upper surface side. That is, the cushioning material 11 can be used on both the upper surface and the bottom surface of the packaged object 17. Further, the cushioning materials 11 attached to the upper surface and the lower surface, respectively, are not integrated. Therefore, the amount of material used when the cushioning material 11 is formed can be reduced. As a result, it can be manufactured at low cost.

Since the material of the cushioning material 11 is made of foamed resin having high impact resistance, when the outer box 20 receives an external force, the cushioning material 11 contracts to absorb the external force and cause a cushioning action. Therefore, the impact on the packaged object 17 is reduced.

(Second Embodiment)
The cushioning material according to the second embodiment will be described with reference to FIGS. 5 to 7. FIG. 5 is an exploded perspective view schematically showing the packaging container structure according to the second embodiment. FIG. 6A is a schematic perspective view of the cushioning material according to the second embodiment, and FIG. 6B is a perspective view seen from below of the cushioning material according to the first embodiment. FIG. 7 is a perspective view showing a state in which the packaging container equipped with the cushioning material according to the second embodiment stores the object to be packed.

The difference between the cushioning material according to the second embodiment and the first embodiment is that the cushioning material provided on the upper part of the packaged object 17 is first in the first portion 1 in the direction from the third surface 6 to the first groove 9. The recess and the second recess are provided in the direction from the fourth surface 8 of the third portion 3 toward the second groove 10. Further, the fifth surface 8 of the third portion 3 of the cushioning material provided in the lower part of the packaged object 17 is inclined. Since the cushioning material according to the second embodiment has the same structure as the cushioning material according to the first embodiment except for the above points, the same parts are designated by the same reference numerals and detailed description thereof will be omitted.

The structure of the cushioning material according to the second embodiment will be described.

An FOSB (board storage container) will be described as an example of the packaged object 17 in the second embodiment.

As the diameter of semiconductor wafers and the like has increased, the size of FOSB used for transporting semiconductor wafers has also increased. In the second embodiment, the FOS B21 for accommodating a 300 mm wafer will be described as an example. The FOSB21 includes a manual FOSB in which an operator manually opens and closes a lid to store a semiconductor wafer, and an auto door FOSB in which a dedicated device automatically opens and closes the lid, but this embodiment does not distinguish between them.

The FOSB 21 is composed of, for example, a container body 15 for aligning and storing 300 mm semiconductor wafers, and a removable lid 16 for opening and closing the container body 15. The lid 16 projects horizontally from the peripheral edge of the container body 15 in the XY direction. The FOSB 21 is stored with the lid 16 facing upward.

The side surface of the container body 15 is narrower on the bottom surface side than on the opening side even in the horizontal direction.

Since the FOSB 21 has a structure in which the lid 16 projects horizontally from the container body 15, the structure of the cushioning material attached to the upper part of the FOSB21 is different from the structure of the cushioning material attached to the lower part. Therefore, in the second embodiment, the cushioning material mounted on the upper portion will be referred to as the first cushioning material 11a, and the cushioning material mounted on the lower portion will be described as the second cushioning material 11b.

As shown in FIG. 6, the first cushioning material 11a includes a first portion 31, a second portion 32 extending from the first portion 31 and integrated, and a first portion 31 to a second portion 32. It has a third portion 33 arranged in the second portion 32 so as to be orthogonal to the stretching direction.

By integrating the first portion 31 with the second portion 32 in a state of being displaced in the Z direction, a step is generated between the first portion 31 and the second portion 32. Similar to the first embodiment, the first portion 31 is provided with the first surface 36. Of the planes perpendicular to the Z direction of the second portion 32, the plane having a continuous surface while being orthogonal to the appearance of the third plane 35 is the second plane 35. The second surface 35 has a role as a support surface.

The first portion 31 is provided with a first recess 37.

The first recess 37 has a constant width in the X direction and extends parallel to the second surface 35 from the third surface 35 toward the first groove 39.

The third portion 33 is provided with a second recess 38.

The second recess 38 has a constant width in the Y direction, and is provided in the third portion 33 along the direction in which the second portion 38 to the third portion 33 extends. By providing the first recess 37 and the second recess 38, the lid 16 is arranged in the space of the first recess 37 and the second recess 38. The surface of the lid 16 in contact with the cushioning material has a smaller contact area than the surface of the side surface of the container body 15 in contact with the cushioning material. Therefore, when the lid 16 comes into contact with the cushioning material 11, it is locally concentrated and the cushioning effect cannot be obtained. Also, local concentration can damage the cushioning material. Therefore, by providing the first recess 37 and the second recess 38, the cushioning material 11a does not come into contact with the lid body 16, and each of the first portion 31 and the third portion 33 comes into contact with the container body 15. As a result, the cushioning material 11a can cushion the impact on the FOSB 21 without receiving local concentration from the lid 16.

Next, the structure of the second cushioning material 11b will be described.

The FOSB 21 is narrowed in the horizontal direction from the upper surface on the opening side of the container body 15 toward the bottom surface. Therefore, the fifth surface 48 of the third portion 43 of the second cushioning material 11b is provided with an inclination. The inclination is provided so as to project from the fourth surface 47 of the third portion 43 toward the second portion 42 side. By providing the second cushioning material 11b with an inclination, the second cushioning material 11b and the FOSB 21 can be brought into contact with each other in a shape in which the container body 15 narrows downward.

As described above, by providing the first recess 37 in the first portion 31 of the first cushioning material 11a and providing the second recess 38 in the third portion 33, the lid 16 of the FOSB 21 is arranged in the space of the recess. NS. As a result, the cushioning material 11a comes into contact with the container body 15 without receiving local concentration from the lid 16, so that the external force received by the FOSB 21 can be sufficiently cushioned. Further, by providing the fifth surface 48 of the third portion 43 of the second cushioning material 11b with an inclination, the second cushioning material 11b is provided along the side surface narrowing in the horizontal direction from the container body 15 toward the bottom surface of the container body 15. Can be in contact with.

Although embodiments of the present invention have been described, the present embodiments are presented as examples and are not intended to limit the scope of the invention. This novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The present embodiment and its modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and the equivalent scope thereof.

1, 31, 41 ... 1st part 2, 32, 42 ... 2nd part 3, 33, 43 ... 3rd part 4 ... 1st surface 5, 35, 45 ... 2nd Surfaces 6, 36 ... Third surface 7, 47 ... Fourth surface 8, 48 ... Fifth surface 9, 39 ... First groove 9a ... First hole 10, 40 ... 2nd groove 10a ... 2nd hole 11 ... Cushioning material 11a ... 1st cushioning material 11b ... 2nd cushioning material 12 ... Packaging container 13 ... Recess 14 ... Opening 15・ ・ ・ Container body 16 ・ ・ ・ Lid 17 ・ ・ ・ Packaged item 20 ・ ・ ・ Outer box 21 ・ ・ ・ FOSB
37 ... 1st recess 38 ... 2nd recess

Claims (7)

The first part having the first surface and
A second surface that is integrated with respect to the first portion in a state of being displaced in the first direction perpendicular to the first surface, and extends in a second direction perpendicular to the first direction and parallel to the first surface. The second part with
The first portion reaches the inside of the first portion from a surface opposite to the first surface, and extends in a third direction perpendicular to the first direction and the second direction to penetrate the first portion. With a first groove
The first portion has a third surface parallel to the first direction and the third direction, and the surface of the second surface and the surface of the third surface are continuously provided, and the surface of the first groove is described. In the cross section extending in the third direction, the width of the end portion inside the first portion of the first groove is wider than the width other than the end portion.
A third portion having a fourth surface parallel to the first surface and a fifth surface intersecting the fourth surface is further provided.
The third portion is connected to the second portion so that the surface of the fifth surface and the surface of the second surface are continuous, and are arranged so as to be offset from the second portion along the first direction. A second portion extending from the second portion along the third direction, reaching the inside of the third portion from a surface opposite to the fourth surface, and extending in the second direction to penetrate the third portion. Has a groove,
A cushioning material in which the angle formed by the fifth surface with the fourth surface is 90 degrees or more. The first part having the first surface and
A second surface that is integrated with respect to the first portion in a state of being displaced in the first direction perpendicular to the first surface, and extends in a second direction perpendicular to the first direction and parallel to the first surface. The second part with
The first portion reaches the inside of the first portion from a surface opposite to the first surface, and extends in a third direction perpendicular to the first direction and the second direction to penetrate the first portion. With a first groove
The first portion has a third surface parallel to the first direction and the third direction, and the surface of the second surface and the surface of the third surface are continuously provided, and the surface of the first groove is described. In the cross section extending in the third direction, the width of the end portion inside the first portion of the first groove is wider than the width other than the end portion.
A third portion having a fourth surface parallel to the first surface and a fifth surface intersecting the fourth surface is further provided.
The third portion is connected to the second portion so that the surface of the fifth surface and the surface of the second surface are continuous, and are arranged so as to be offset from the second portion along the first direction. A second portion extending from the second portion along the third direction, reaching the inside of the third portion from a surface opposite to the fourth surface, and extending in the second direction to penetrate the third portion. Has a groove,
A cushioning material in which the first width of the first portion along the third direction and the third width of the third portion along the second direction are the same. The first part having the first surface and
A second surface that is integrated with respect to the first portion in a state of being displaced in the first direction perpendicular to the first surface, and extends in a second direction perpendicular to the first direction and parallel to the first surface. The second part with
The first portion reaches the inside of the first portion from a surface opposite to the first surface, and extends in a third direction perpendicular to the first direction and the second direction to penetrate the first portion. With a first groove
The first portion has a third surface parallel to the first direction and the third direction, and the surface of the second surface and the surface of the third surface are continuously provided, and the surface of the first groove is described. In the cross section extending in the third direction, the width of the end portion inside the first portion of the first groove is wider than the width other than the end portion.
A third portion having a fourth surface parallel to the first surface and a fifth surface intersecting the fourth surface is further provided.
The third portion is connected to the second portion so that the surface of the fifth surface and the surface of the second surface are continuous, and are arranged so as to be offset from the second portion along the first direction. A second portion extending from the second portion along the third direction, reaching the inside of the third portion from a surface opposite to the fourth surface, and extending in the second direction to penetrate the third portion. Cushioning material with grooves and
A packaging container having a plane on a rectangle and four interconnected peripheral walls extending in a direction perpendicular to the plane from four sides forming the outer periphery of the plane.
In the corner of the packaging container, the first groove and the second groove of the cushioning material are connected to one of the four peripheral walls and the one peripheral wall at the corner. A packaging container structure that is fitted into one peripheral wall and supports an object to be packed on the second surface, the third surface, and the fifth surface. The packaging container structure according to claim 3, wherein the angle formed by the fifth surface with the fourth surface is 90 degrees or more. The packaging container structure according to claim 3, wherein the first width of the first portion along the third direction and the third width of the third portion along the second direction are the same. The packaging container structure according to claim 3, wherein an opening penetrating the packaging container is provided in the flat surface portion of the packaging container, and the second portion of the cushioning material is fitted in the opening. The packaging container structure according to claim 6, wherein the surface of the cushioning material that projects the opening of the second portion is flush with the outer surface of the flat surface portion of the packaging container.

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