JP2021031133A - Cushioning member and cushioning member formation material - Google Patents

Abstract

To provide a cushioning member capable of suppressing generation of a circulation failure of a medium in cushioning chambers adjacent to each other, and to provide a cushioning member formation material.SOLUTION: A cushioning member includes: a resin sheet welded so as to be a bag body; and a medium sealed in the resin sheet. The resin sheet includes: a partition welding part 120 for partitioning a cushioning region 110 having a shape extending in one direction; and a partition welding part 130 for partitioning the cushioning region 110 into a first cushioning chamber 111, a second cushioning chamber 112 and a plurality of connection flow passages 113. The partition welding part 130 forms a plurality of first openings h1 for communicating the plurality of connection flow passages 113 and the first cushioning chamber 111, forms a plurality of second openings h2 for communicating the plurality of connection flow passages 113 and the second cushioning chamber 112, and has a shape for communicating the plurality of first openings h1 and the plurality of second openings h2.SELECTED DRAWING: Figure 3

Description

The present invention relates to a cushioning member and a cushioning member forming material.

Conventionally, a cushioning member used when packing an object to be packed is known. For example, Japanese Patent Application Laid-Open No. 2013-173553 (hereinafter referred to as "Patent Document 1") discloses an air cushioning material (cushioning member) in which air is sealed in a film welded so as to form a bag. ing. This air cushioning material has a plurality of expansion portions partitioned by a transverse partition welding portion. Each expansion portion has a plurality of compartmentalized expansion portions provided so as to be continuous in a direction parallel to the longitudinal direction of the transverse partition welding portion, and an air flow passage for connecting the compartmentalized expansion portions adjacent to each other. There is. Each division expansion portion is divided by a bending welding portion, and an air flow passage is defined by a bending welding portion. The bent welding portion has a pair of protruding portions having a shape protruding from the transverse partition welding portion in a direction orthogonal to the longitudinal direction of the transverse partition welding portion.

This air cushioning material is arranged between the packaged object and the corrugated cardboard box in a state of being bent at the bent welding portion. In this state, when an external force acts on the specific compartmentalized expansion portion, air flows from the compartmentalized expansion portion to the compartmentalized expansion portion adjacent to the specific compartmentalized expansion portion through the air flow passage. At this time (when air passes through the air flow passage), a part of the impact energy due to the external force is consumed, so that the cushioning function of the cushioning member is improved.

Japanese Unexamined Patent Publication No. 2013-173553

In the buffer member described in Patent Document 1, the air flow passage may be blocked due to a breakage of a portion of the film forming the air flow passage, and in this case, the cushioning function is deteriorated.

An object of the present invention is to provide a buffer member and a buffer member forming material capable of suppressing the occurrence of poor distribution of a medium between buffer chambers adjacent to each other.

The cushioning member according to one aspect of the present invention includes a resin sheet welded so as to form a bag and a medium enclosed in the resin sheet, and the resin sheet has a shape extending in one direction. A compartmentalized welded portion for partitioning a buffer region having a buffer region, a first buffer chamber having a shape extending in one direction, and a first buffer chamber having a shape extending in one direction and extending in one direction from the first buffer chamber. The partition has a second buffer chamber formed at a separated position, a plurality of connecting flow paths for connecting the first buffer chamber and the second buffer chamber, and a partition welding portion for partitioning the first buffer chamber and the second buffer chamber. The welding portion forms a plurality of first openings for communicating the plurality of connecting flow paths and the first buffer chamber, and a plurality of second openings for communicating the plurality of connecting flow paths and the second buffer chamber. And has a shape that allows the plurality of first openings and the plurality of second openings to communicate with each other.

Since this cushioning member has a plurality of connecting flow paths, even if a specific connecting flow path is blocked due to a breakage of a portion of the resin sheet forming the plurality of connecting flow paths, the remaining. The flow of the medium between the first buffer chamber and the second buffer chamber is ensured by the connecting flow path of the above. Therefore, the occurrence of poor distribution of the medium between the buffer chambers adjacent to each other is suppressed.

For example, the partition welding portion has a continuous welding portion having a shape that continuously extends from the first buffer chamber to the second buffer chamber, and the continuous welding portion is on the first buffer chamber side. It has a first end portion that is formed and defines the plurality of first openings, and a second end portion that is formed on the side of the second buffer chamber and defines the plurality of second openings. May be good.

In this aspect, the above effects can be effectively obtained.

Further, the partition welding portion has a plurality of scattered welding portions scattered between the first buffer chamber and the second buffer chamber, and is formed on the first buffer chamber side of the plurality of scattered welding portions. The scattered welded portion defines the plurality of first openings, and the scattered welded portion formed on the second buffer chamber side of the plurality of scattered welded portions defines the plurality of second openings, and the resin. The portion of the sheet between the plurality of scattered welded portions may form the connecting flow path.

Also in this aspect, the above effect can be effectively obtained.

Further, it is preferable that the welding area of the partition welding portion gradually increases from both ends of the partition welding portion in one direction toward the central portion.

In this way, the flow path area of the connecting flow path gradually decreases from each buffer chamber toward the center of the connecting flow path in one direction, so that the flow path area of the connecting flow path becomes sharply small in one direction. The occurrence of wrinkles in the connecting flow path or a portion in the vicinity thereof (bent portion) is suppressed as compared with the case where.

Further, the compartment welded portion has longitudinal welded portions formed on both sides of the buffer region in an orthogonal direction orthogonal to the one direction, and the dimension between both ends of the partition welded portion in the one direction is as described above. It is preferable that the size gradually increases from the central portion between the pair of longitudinal welded portions adjacent to each other in the orthogonal direction toward the longitudinal welded portion.

By doing so, the formation of the corner portion at the boundary portion between each buffer chamber and the connecting flow path is suppressed, so that the occurrence of wrinkles at or near the boundary portion is suppressed.

Further, it is preferable that no corner portion is formed at the edge portion of the partition welding portion.

By doing so, the occurrence of stress concentration on the edge portion of the partition welded portion is suppressed, so that the occurrence of peeling at the partition welded portion is suppressed.

Further, the cushioning member according to another aspect of the present invention includes a resin sheet welded so as to form a bag and a medium enclosed in the resin sheet, and the resin sheet is unidirectionally provided. It has a buffer region having an extending shape, and the buffer region is separated from the first buffer chamber having a shape extending in one direction and the first buffer chamber having a shape extending in one direction and having a shape extending in one direction. It has a second buffer chamber formed at the above-mentioned position, and a plurality of connecting flow paths each connecting the first buffer chamber and the second buffer chamber.

Further, the cushioning member forming material according to one aspect of the present invention is made of a resin sheet welded so as to form a bag, and the cushioning member is formed by enclosing the medium in the resin sheet. It is a material. The cushioning member forming material has a partition welding portion for partitioning a buffer region having a shape extending in one direction, a first buffer chamber having a shape extending in one direction, and a shape extending in one direction. A second buffer chamber having and formed at a position separated from the first buffer chamber in one direction, and a plurality of connecting flow paths each connecting the first buffer chamber and the second buffer chamber. The partition welding portion is provided with a partition welding portion, which forms a plurality of first openings for communicating the connecting flow path and the first buffer chamber, and the connecting flow path and the second buffer chamber are formed. It has a shape in which a plurality of second openings for communicating with each other are formed, and the plurality of first openings and the plurality of second openings are communicated with each other.

As described above, according to the present invention, it is possible to provide a buffer member and a buffer member forming material capable of suppressing the occurrence of poor distribution of media between buffer chambers adjacent to each other.

It is a perspective view which shows typically the cushioning member of 1st Embodiment of this invention. FIG. 5 is a plan view schematically showing a state in which the cushioning member shown in FIG. 1 is arranged between the packaged object and the outer box. It is a front view of the cushioning member forming material which constitutes the cushioning member shown in FIG. It is an enlarged view of the partition welding part of the cushioning member of the 2nd Embodiment of this invention. It is a figure which shows the modification of the partition welding part of the shock absorbing member shown in FIG. It is a figure which shows the modification of the partition welding part of the shock absorbing member shown in FIG. It is a figure which shows the modification of the partition welding part of the shock absorbing member shown in FIG. It is a figure which shows the modification of the partition welding part of the shock absorbing member shown in FIG. It is a figure which shows the modification of the partition welding part of the shock absorbing member shown in FIG. It is a figure which shows the modification of the partition welding part of the shock absorbing member shown in FIG. It is a figure which shows the modification of the partition welding part of the shock absorbing member shown in FIG. It is a figure which shows the modification of the partition welding part of the shock absorbing member shown in FIG. It is a figure which shows the modification of the partition welding part of the shock absorbing member shown in FIG. FIG. 13 is an enlarged view of a range surrounded by a solid line XIV in FIG. It is a figure which shows the modification of the partition welding part of the cushioning member shown in FIG. FIG. 15 is an enlarged view of a range surrounded by a solid line XVI in FIG.

Embodiments of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are given the same number.

(First Embodiment)
FIG. 1 is a perspective view schematically showing a cushioning member according to a first embodiment of the present invention. FIG. 2 is a plan view schematically showing a state in which the cushioning member shown in FIG. 1 is arranged between the packaged object and the outer box.

As shown in FIGS. 1 and 2, the cushioning member 10 of the present embodiment is arranged in the gap between the packaged object 1 such as the image forming apparatus and the outer box 2. The cushioning member 10 suppresses the external force applied to the outer box 2 from being transmitted to the packaged object 1. The cushioning member 10 has a cushioning member forming material 12 and a medium (air in this embodiment).

FIG. 3 is a front view of the cushioning member forming material constituting the cushioning member shown in FIG. The cushioning member forming material 12 is made of a resin sheet welded so as to form a bag. The resin sheet has, for example, a structure in which nylon and polyethylene are laminated. The cushioning member 10 is formed by enclosing the medium in the cushioning member forming material 12.

The cushioning member 10 has at least one buffering region 110. In this embodiment, the buffer member 10 has three buffer regions 110. However, the number of buffer regions 110 is not limited to three. A medium is enclosed in each buffer region 110. Each buffer region 110 has a shape extending in one direction (hereinafter, referred to as "first direction"). The plurality of buffer regions 110 are arranged so as to be adjacent to each other in the second direction orthogonal to the first direction.

Each buffer region 110 has a first buffer chamber 111, a second buffer chamber 112, and a plurality of connecting flow paths 113.

The first buffer chamber 111 has a shape extending in the first direction. The cross section of the first buffer chamber 111 in a plane orthogonal to the first direction is substantially circular.

The second buffer chamber 112 has a shape extending in the first direction. The second buffer chamber 112 is formed at a position separated from the first buffer chamber 111 in the first direction. The cross section of the second buffer chamber 112 in a plane orthogonal to the first direction is substantially circular.

Each connecting flow path 113 connects the first buffer chamber 111 and the second buffer chamber 112. In the present embodiment, each connecting flow path 113 has a shape that continuously extends from the first buffer chamber 111 to the second buffer chamber 112. Specifically, each connecting flow path 113 has a shape extending along the first direction. The plurality of connecting flow paths 113 are formed so as to be arranged at intervals in the second direction. Each connecting flow path 113 communicates with the first buffer chamber 111 through the first opening h1 and communicates with the second buffer chamber 112 through the second opening h2. The flow path area of the plurality of connecting flow paths 113 (sum of the flow path areas of each connecting flow path 113) is the cross-sectional area of the first buffer chamber 111 and the disconnection of the second buffer chamber 112 in a plane orthogonal to the first direction. Smaller than the area.

As shown in FIGS. 1 and 2, the cushioning member 10 is configured to be bendable at an intermediate portion where a plurality of connecting flow paths 113 are formed. In other words, the intermediate portion connects the first buffer chamber 111 and the second buffer chamber 112 so as to allow the second buffer chamber 112 to bend with respect to the first buffer chamber 111. Therefore, as shown in FIG. 2, in the cushioning member 10, the first buffer chamber 111 is arranged so as to face one side surface of the packed object 1, and the second buffer chamber 112 is included in the packed object 1. It can be arranged so as to face a side surface adjacent to one side surface. However, the cushioning member 10 may be arranged so that both the first buffer chamber 111 and the second buffer chamber 112 face only one side surface of the packaged object 1.

Further, the diameter D (see FIG. 2) of each connecting flow path 113 is preferably set to 0.01 mm or more and 6.36 mm or less. By setting the diameter D in this way, when the cushioning member 10 is arranged in a bent state in the gap between the packaged object 1 and the outer box 2, the packaged object 1 in the connecting flow path 113 Since the amount of contraction of the near portion is small, the occurrence of wrinkles in the intermediate portion is suppressed.

Here, a case where an external force acts on the outer box 2 will be described. For example, when the second buffer chamber 112 is pushed by the external force, the medium passes through each connecting flow path 113 from the second buffer chamber 112 toward the first buffer chamber 111. At this time, since resistance is generated, a part of the impact energy due to the external force is consumed in each connecting flow path 113. Therefore, the cushioning function of the cushioning member 10 against the external force acting on the outer box 2 is enhanced.

Next, the welded portion provided on the cushioning member 10 or the cushioning member forming material 12 will be described with reference to FIG. As shown in FIG. 3, the cushioning member 10 or the cushioning member forming material 12 has a partition welding portion 120 and a partition welding portion 130.

The compartment welding portion 120 partitions each buffer region 110. Specifically, the compartment welding portion 120 is a portion where the resin sheet is welded so that a plurality of buffer regions 110 are formed. The compartment welding portion 120 has a longitudinal welding portion 121 and a short welding portion 122.

The longitudinal welded portion 121 has a shape extending along the first direction. The longitudinal welded portion 121 is formed on both sides of each buffer region 110 in the second direction.

The short welded portion 122 has a shape extending along the second direction. The short welded portion 122 is formed on both sides of each buffer region 110 in the first direction. In the present embodiment, the longitudinal welded portion 121 and the short welded portion 122 partition the rectangular buffer region 110.

The partition welding portion 130 partitions each buffer region 110 into a first buffer chamber 111, a second buffer chamber 112, and a plurality of connecting flow paths 113. Specifically, the partition welding portion 130 is a portion where the resin sheet is welded so that each buffer region 110 is partitioned into a first buffer chamber 111, a second buffer chamber 112, and a plurality of connecting flow paths 113. The partition welding portion 130 forms a first opening h1 that communicates each connecting flow path 113 and the first buffer chamber 111, and a plurality of second openings h2 that communicate each connecting flow path 113 and the second buffer chamber 112. Is forming. The partition welding portion 130 has a shape that allows the plurality of first openings h1 and the plurality of second openings h2 to communicate with each other. In the present embodiment, the partition welding portion 130 has a continuous welding portion 131.

The continuous welding portion 131 has a shape that continuously extends from the first buffer chamber 111 to the second buffer chamber 112. In the present embodiment, the continuous welding portion 131 has a shape extending linearly along the first direction. However, the continuous welding portion 131 is not limited to the shape extending in parallel with the first direction as long as it has a shape extending continuously from the first buffer chamber 111 to the second buffer chamber 112. It may be formed in a shape extending so as to intersect in one direction, or may be formed so as to be curved.

As described above, since the cushioning member 10 of the present embodiment has a plurality of connecting flow paths 113 for connecting the first buffer chamber 111 and the second buffer chamber 112, a plurality of resin sheets are used. Even if the specific connecting flow path 113 is blocked due to the breakage of the portion forming the connecting flow path 113, the remaining connecting flow path 113 of the medium between the first buffer chamber 111 and the second buffer chamber 112 Distribution is secured. Therefore, the occurrence of poor distribution of the medium between the buffer chambers 111 and 112 adjacent to each other is suppressed.

(Second Embodiment)
Next, the cushioning member 10 of the second embodiment of the present invention will be described with reference to FIG. In the second embodiment, only the parts different from those in the first embodiment will be described, and the description of the same structure, action and effect as in the first embodiment will not be repeated.

In the present embodiment, the partition welding portion 130 has a plurality of scattered welding portions 132 scattered between the first buffer chamber 111 and the second buffer chamber 112. Of the plurality of scattered welded portions 132, the scattered welded portion 132 formed on the first buffer chamber 111 side defines a plurality of first openings h1. Of the plurality of scattered welded portions 132, the scattered welded portion 132 formed on the second buffer chamber 112 side defines a plurality of second openings h2. The portion of the resin sheet between the plurality of scattered welded portions 132 constitutes each connecting flow path 113. That is, in the present embodiment, the plurality of connecting flow paths 113 are branched and merged between the first buffer chamber 111 and the second buffer chamber 112. Each scattered welded portion 132 is formed in a hexagonal shape.

Also in this aspect, the occurrence of poor distribution of the medium between the buffer chambers 111 and 112 adjacent to each other is suppressed.

Hereinafter, a modified example of the partition welding portion 130 will be described with reference to FIGS. 5 to 16.

As shown in FIGS. 5 and 6, each scattered welded portion 132 may be formed in a polygon (convex polygon or concave polygon) different from the hexagon.

As shown in FIG. 7, the welding area of the partition welding portion 130 may gradually increase from both ends of the partition welding portion 130 in the first direction toward the central portion. In this embodiment, since the flow path area of the connecting flow path 113 gradually decreases from the buffer chambers 111 and 112 toward the central portion of the connecting flow path 113 in the first direction, the flow of the connecting flow path 113 in the first direction Compared with the case where the road area is rapidly reduced, the occurrence of wrinkles in the connecting flow path 113 or a portion (bent portion) in the vicinity thereof is suppressed.

As shown in FIG. 8, the dimension between both ends of the partition welding portion 130 in the first direction increases from the central portion between the pair of longitudinal welding portions 121 adjacent to each other in the second direction toward the longitudinal welding portion 121. It may be getting bigger and bigger. In this aspect, since the formation of the corner portion at the boundary portion between the buffer chambers 111 and 112 and the connecting flow path 113 is suppressed, the occurrence of wrinkles at or near the boundary portion is suppressed.

In this case, the ratio of the protrusion amount L of the partition welding portion 130 to the width W of each of the buffer chambers 111 and 112 is preferably set to 0.5 or more and 3 or less.

Here, the width W means the distance between a pair of longitudinal welded portions 121 adjacent to each other in the second direction. The protrusion amount L is a portion located at the end of the partition welding portion 130 in the first direction and at the center between a pair of longitudinal welding portions 121 adjacent to each other in the second direction, and the partition welding portion 130 in the first direction. It means the distance between the end portion of the partition welding portion 130 in the second direction and the end portion in the direction parallel to the first direction.

As shown in FIG. 9, at the end of the partition welding portion 130 in the second direction, the welding area of the partition welding portion 130 gradually increases from both ends of the partition welding portion 130 in the first direction toward the center. It may be.

As shown in FIGS. 10 to 16, it is preferable that no corners are formed at the edges of the scattered welded portions 132. In this aspect, since the occurrence of stress concentration on the edge of each scattered welding portion 132 is suppressed, the occurrence of peeling at each scattered welding portion 132 is suppressed.

It should be noted that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and it is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

For example, each modification of the second embodiment shown in FIGS. 7 to 9 may be applied to the continuous welding portion 131 of the first embodiment. Further, it is preferable that no corner portion is formed at the edge portion of the continuous welding portion 131.

Further, the partition welding portion 130 may have both a continuous welding portion 131 and a scattered welding portion 132.

1 Packaged object, 2 Outer box, 10 Cushioning member, 12 Cushioning member forming material, 110 Cushioning area, 111 First buffer chamber, 112 Second buffer chamber, 113 Connecting flow path, 120 compartment welding part, 121 Longitudinal welding part 122 Short welding part, 130 partition welding part, 131 continuous welding part, 132 scattered welding part, h1 first opening, h2 second opening.

Claims (8)

A resin sheet welded into a bag shape and
A medium enclosed in the resin sheet is provided.
The resin sheet is
A compartment welded portion that partitions a buffer region having a shape extending in one direction,
The buffer region has a first buffer chamber having a shape extending in one direction and a second buffer chamber having a shape extending in one direction and being formed at a position separated from the first buffer chamber in the one direction. Each has a plurality of connecting flow paths for connecting the first buffer chamber and the second buffer chamber, and a partition welding portion for partitioning the first buffer chamber and the second buffer chamber.
The partition welding portion forms a plurality of first openings for communicating the plurality of connecting flow paths and the first buffer chamber, and a plurality of first openings for communicating the plurality of connecting flow paths and the second buffer chamber. A cushioning member having a shape that forms two openings and allows the plurality of first openings to communicate with the plurality of second openings. The partition welding portion has a continuous welding portion having a shape that continuously extends from the first buffer chamber to the second buffer chamber.
The continuous welded part is
A first end formed on the first buffer chamber side and defining the plurality of first openings, and
The cushioning member according to claim 1, further comprising a second end portion formed on the second buffer chamber side and defining the plurality of second openings. The partition welding portion has a plurality of scattered welding portions scattered between the first buffer chamber and the second buffer chamber.
Of the plurality of scattered welded portions, the scattered welded portions formed on the first buffer chamber side define the plurality of first openings.
Of the plurality of scattered welded portions, the scattered welded portions formed on the second buffer chamber side define the plurality of second openings.
The cushioning member according to claim 1, wherein a portion of the resin sheet between the plurality of scattered welded portions constitutes the connecting flow path. The cushioning member according to any one of claims 1 to 3, wherein the welding area of the partition welding portion gradually increases from both ends of the partition welding portion in one direction toward the central portion. The compartment welded portion has longitudinal welded portions formed on both sides of the buffer region in an orthogonal direction orthogonal to the one direction.
From claim 1, the dimension between both ends of the partition welding portion in one direction gradually increases as it approaches the longitudinal welding portion from the central portion between the pair of longitudinal welding portions adjacent to each other in the orthogonal direction. The cushioning member according to any one of 4. The cushioning member according to any one of claims 1 to 5, wherein no corner portion is formed at the edge portion of the partition welding portion. A resin sheet welded into a bag shape and
A medium enclosed in the resin sheet is provided.
The resin sheet has a buffer region having a shape extending in one direction.
The buffer area is
The first buffer chamber having a shape extending in one direction and
A second buffer chamber having a shape extending in one direction and formed at a position separated from the first buffer chamber in the one direction.
A cushioning member, each having a plurality of connecting flow paths that connect the first buffer chamber and the second buffer chamber. It is a cushioning member forming material which is made of a resin sheet welded so as to form a bag and forms a cushioning member by enclosing a medium in the resin sheet.
A compartment welded portion that partitions a buffer region having a shape extending in one direction,
The buffer region has a first buffer chamber having a shape extending in one direction and a second buffer chamber having a shape extending in one direction and being formed at a position separated from the first buffer chamber in the one direction. Each has a plurality of connecting flow paths for connecting the first buffer chamber and the second buffer chamber, and a partition welding portion for partitioning the first buffer chamber and the second buffer chamber.
The partition welding portion forms a plurality of first openings for communicating the connecting flow path and the first buffer chamber, and forms a plurality of second openings for communicating the connecting flow path and the second buffer chamber. A cushioning member forming material having a shape that allows the plurality of first openings and the plurality of second openings to communicate with each other.

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