JP2019182499A - Pulp mold cushioning member - Google Patents

Abstract

To provide a pulp mold cushioning member which inhibits reduction of rigidity and can improve transportation efficiency.SOLUTION: A cushioning member 1 opens upward. A front wall 10A has an outer wall portion 13 and inner wall portions 11a, 12a which array in the right and left direction. The inner wall portions 11a, 12a project to the inside of a storage space compared with the outer wall portion 13. The front wall 10A never has a flange on an upper edge 10a thereof.SELECTED DRAWING: Figure 4B

Description

  The present disclosure relates to a pulp mold cushioning material.

  In the transportation of commodities such as electronic devices, a cushioning material for protecting the commodities is used. The product is put in a transport container with a cushioning material attached to the outside. As the buffer material, a molded product (pulp mold buffer material) made of paper may be used. As disclosed in Japanese Patent Laid-Open No. 2001-146700 (Patent Document 1), a conventional pulp mold cushioning material has a portion that extends toward the outside of the cushioning material at the edge thereof. That is, the conventional pulp mold cushioning material has a flange at its edge. Such a flange contributes to securing the rigidity of the cushioning material.

JP 2001-146700 A

  However, when a flange is formed on the edge of the cushioning material, the size of the cushioning material increases by the width of the flange, and thus it is necessary to use a large storage box. This leads to a reduction in the transportation efficiency of goods.

  Moreover, depending on the external shape of the product, a large force may act between the product and the cushioning material.

  A first object of the present disclosure is to propose a pulp mold cushioning material that can improve transportation efficiency while suppressing a decrease in rigidity.

  The second object of the present disclosure is to prevent a large force from acting between the pulp mold cushioning material and the commodity.

  The pulp mold cushioning material proposed in the present disclosure has a plurality of main walls that define an accommodation space in which an object to be accommodated is disposed inside and have an opening that is open in a first direction. The plurality of main walls have first main walls. The first main wall has a first outer wall portion and a first inner wall portion projecting inside the housing space from the first outer wall portion, and the first outer wall portion and the first inner wall portion are They are arranged in a second direction orthogonal to the first direction. The first main wall has an edge extending in the second direction at an end of the first main wall in the first direction, and the first main wall is flanged to the edge. Does not have. According to this pulp mold cushioning material, it is possible to suppress a decrease in rigidity of the pulp mold cushioning material, and to improve the transportation efficiency of goods.

  Another example of the pulp mold cushioning material proposed in the present disclosure includes a plurality of main walls that define an accommodation space in which an object to be accommodated is disposed and have an opening that is open in a first direction. It is a pulp mold cushioning material. The plurality of main walls have first main walls. The first main wall includes a first outer wall portion, and at least two first convex portions having a first inner wall portion projecting inside the housing space from a position of the first outer wall portion. Have. The first outer wall portion is located between the at least two first convex portions, and is aligned with the at least two first convex portions in a second direction orthogonal to the first direction, The first outer wall portion includes a first edge portion that is located at an end portion of the outer wall portion in the first direction and is a part of an edge of the opening, and the at least two first convex portions are provided. Each has an end wall portion located at an end portion of the first inner wall portion in the first direction, and the end wall portions of the at least two first protrusions are the first outer wall. Are connected to each other via the first edge of the portion. According to this pulp mold cushioning material, it is possible to suppress a decrease in rigidity of the pulp mold cushioning material, and to improve the transportation efficiency of goods.

  Another pulp mold cushioning material proposed in the present disclosure includes an accommodation space that is open in a first direction and in which an object to be accommodated is disposed, and a plurality of main walls that define the accommodation space. is doing. The plurality of main walls include a first main wall and a second main wall that is located in a direction opposite to the first direction with respect to the first main wall and is connected to the first main wall. is doing. The first main wall includes a first outer wall portion, and a first inner wall portion that protrudes to the inside of the housing space from the first outer wall portion, and the first outer wall portion and the first inner wall portion are They are arranged in a second direction orthogonal to the first direction. The second main wall has a second outer wall portion, and a second inner wall portion that protrudes to the inside of the accommodation space from the second outer wall portion, and the second outer wall portion and the second inner wall portion are They are lined up in the second direction. A recess or a hole is formed in a connection portion between the first inner wall portion and the second inner wall portion. According to this pulp mold cushioning material, it is possible to prevent a large force from acting between the pulp mold cushioning material and the product.

It is a perspective view which shows the example of the pulp mold shock absorbing material proposed by this indication. It is a front view which faces a pulp mold shock absorbing material in the direction which the arrow II shown in FIG. 1 shows. It is sectional drawing in the III-III line | wire shown in FIG. It is sectional drawing in the IVa-IVa line | wire shown in FIG. It is sectional drawing in the IVb-IVb line | wire shown in FIG. It is sectional drawing in the IVc-IVc line | wire shown in FIG. It is the enlarged view of the area | region V shown to FIG. 4B. It is an enlarged view of FIG. It is a perspective view which faces the part shown in FIG. 6A from another angle. It is sectional drawing in the VII-VII line shown in FIG.

  Hereinafter, the example of embodiment of the pulp mold buffer material proposed by this indication is explained. In this specification, the pulp mold shock absorbing material 1 is demonstrated as an example of embodiment, referring FIG. 1 thru | or FIG. Hereinafter, the pulp mold cushioning material 1 is simply referred to as the cushioning material 1.

  In the following description, the Y1 and Y2 directions shown in FIG. 1 and the like are respectively referred to as front and rear, the X1 and X2 directions are respectively referred to as right and left, and the Z1 and Z2 directions are referred to as upward and downward. These directions are used to indicate the relative positional relationship of each part of the cushioning material 1 and do not define the posture of the cushioning material 1 when used.

  As shown in FIG. 1, the cushioning material 1 has a box shape opened upward. When the cushioning material 1 is used, an object P (see FIG. 3) such as an electronic device is disposed inside the cushioning material 1. . That is, the shock absorbing material 1 has the accommodation space in which the to-be-contained object P is arrange | positioned inside. When the cushioning material 1 is used, for example, two cushioning materials 1 facing each other are used for one object. The to-be-contained object P is put in the storage box in a state where the cushioning material 1 is fitted on the outside.

  The cushioning material 1 has a plurality of main walls that define the accommodation space. The cushioning material 1 has a front wall 10A, a rear wall 10B, a right wall 20A, a left wall 20B, and a bottom wall 30 as main walls. The right wall 20A is located on the right side of the walls 10A and 10B and is connected to the ends of the walls 10A and 10B. Similarly, the left wall 20B is located on the left side of the walls 10A and 10B and is connected to the ends of the walls 10A and 10B. The bottom wall 30 is located below the walls 10A, 10B, 20A, 20B.

  The buffer material 1 is a molded product made of paper (for example, waste paper) as a raw material, and the walls 10A, 10B, 20A, 20B, and 30 are integrally molded. That is, the cushioning material 1 is not formed by bending the walls 10A, 10B, 20A, 20B, 30 and is connected to each other by applying an adhesive to the walls 10A, 10B, 20A, 20B, 30. It is not what was done.

  The shape of the cushioning material is not limited to the example of the cushioning material 1. The cushioning material 1 may have only a part of the walls 10A, 10B, 20A, 20B, 30. For example, the cushioning material 1 includes only the front wall 10A, the bottom wall 30, and the rear wall 10B, and may not include the walls 20A and 20B. As another example, the cushioning material 1 may have only the front wall 10 </ b> A, the right wall 20 </ b> A, and the bottom wall 30. Such a cushioning material 1 opens in three directions (upward, forward, leftward), and can be attached to the corner of the object P. In the cushioning material 1, the length in the left-right direction of the front wall 10A and the rear wall 10B is larger than the length in the front-rear direction of the right wall 20A and the left wall 20B. Unlike the cushioning material 1, the lengths of the front wall 10A and the rear wall 10B in the left-right direction may be the same as or smaller than the lengths of the right wall 20A and the left wall 20B in the front-rear direction.

  As shown in FIG. 1, the front wall 10 </ b> A is formed with a plurality of convex portions 11 and 12 projecting toward the inside of the accommodation space (projecting rearward). The 1st convex part 11 has the inner wall part 11a (refer FIG. 4A) of the 1st convex part 11 which faced the inner side of the accommodation space and was extended from the bottom wall 30 to the upper side. The 2nd convex part 12 has the inner wall part 12a (refer FIG. 4C) of the 2nd convex part 12 which faced the inner side of the accommodation space and was extended from the bottom wall 30 to the upper side. The convex portions 11 and 12 are arranged at intervals in the left-right direction, and the front wall 10A is an outer wall portion 13 extending upward from the bottom wall 30 between two adjacent convex portions 11 and 12 (FIG. 4B). See). In other words, one outer wall portion 13 is provided between two adjacent two inner wall portions 11a and 12a (that is, between the two adjacent inner wall portions 11a and between the adjacent inner wall portions 11a and 12a). Is formed. The inner wall portions 11 a and 12 a protrude beyond the outer wall portion 13 to the inside of the accommodation space. That is, the inner wall portions 11 a and 12 a formed on the front wall 10 </ b> A are located behind the outer wall portion 13.

  As shown in FIGS. 4A and 4C, the inner wall portion 11 a of the first convex portion 11 is larger than the inner wall portion 12 a of the second convex portion 12 and protrudes inside the accommodation space. In the front wall 10 </ b> A, the inner wall portion 11 a of the first convex portion 11 is located behind the inner wall portion 12 a of the second convex portion 11. Therefore, the position of the inner wall portion 12a in the front-rear direction is between the position of the inner wall portion 11a and the position of the outer wall portion 13 in the front-rear direction. When the cushioning material 1 is used, the front wall 10 </ b> A supports the object P by the inner wall portion 11 a of the first convex portion 11. In a state where the first convex portion 11 is not deformed, the inner wall portion 12a of the second convex portion 12 does not hit the object P. By forming the two types of convex portions 11 and 12 having different projecting widths on the front wall 10A in this way, for example, compared to a structure in which all the convex portions have the same size, a large force is exerted on the object P. Can be prevented from acting. In the example of the cushioning material 1, three first convex portions 11 and three second convex portions 12 are formed on the front wall 10A. The number of the convex parts 11 and 12 is not restricted to the example of the buffer material 1.

  In the example of the cushioning material 1, the width of the first projection 11 in the left-right direction and the width of the second projection 12 in the left-right direction are substantially the same. It is not limited to examples. Moreover, although the outer wall part 13 is substantially the same as the convex parts 11 and 12 in the width in the left-right direction, the size thereof is not limited to the example of the cushioning material 1.

  The convex portions 11 and 12 are columnar and have side wall portions 11b and 12b (see FIG. 6A) that extend forward from the right and left edges of the inner wall portions 11a and 12a and are connected to the outer wall portion 13, respectively. Yes. Moreover, the convex parts 11 and 12 have the upper end wall parts 11c and 12c (refer FIG. 6A) extended ahead from the upper edge of the inner wall parts 11a and 12a, respectively. With this structure of the front wall 10A, the rigidity of the front wall 10A can be further improved. The heights of the upper end wall portions 11c and 12c coincide with the height of the upper edge 10a (see FIGS. 4A and 4C) of the front wall 10A.

  The rear wall 10B of the cushioning material 1 has the same structure as the front wall 10A. That is, the rear wall 10B has the convex portions 11 and 12 and the outer wall portion 13 described above. In the example of the cushioning material 1, the positions of the protrusions 11 and 12 of the rear wall 10 </ b> B in the left-right direction coincide with the positions of the protrusions 11 and 12 of the front wall 10 </ b> A in the left-right direction. Unlike the cushioning material 1, the convex portions 11 and 12 of the rear wall 10B and the convex portions 11 and 12 of the front wall 10A may be displaced in the left-right direction.

  The structure of the front wall 10A and the rear wall 10B is not limited to the example of the cushioning material 1. For example, the position of the inner wall portion 12 a of the second convex portion 12 in the front-rear direction may be the same as the inner wall portion 11 a of the first convex portion 11. That is, the front wall 10A and the rear wall 10B may have only one type of convex portion. Unlike this, the front wall 10A and the rear wall 10B may have three types of convex portions with different inwardly protruding sizes. In still another example, the convex portions 11 and 12 may not reach the upper edge 10a of the front wall 10A. That is, the upper end wall portions 11c and 12c may be formed at a position lower than the upper edge 10a of the front wall 10A. In still another example, the structure of the front wall 10A and the rear wall 10B may not be the same.

  As shown in FIG. 1, the right wall 20 </ b> A is also formed with a convex portion 21 that projects toward the inside of the accommodation space (projects toward the left). Two convex portions 21 are formed on the right wall 20A, and these are aligned in the front-rear direction. The number of convex portions 21 formed on the right wall 20A is not limited to the example of the cushioning material 1. For example, the number of the convex portions 21 may be one, or may be three or more. The convex portion 21 has an inner wall portion 21 a (see FIG. 3) that faces the inside of the housing space and extends upward from the bottom wall 30. The right wall 20A has a plurality of outer wall portions 23 (see FIG. 3) extending upward from the bottom wall 30. The inner wall portion 21a and the outer wall portion 23 of the convex portion 21 are alternately arranged in the front-rear direction. That is, one outer wall portion 23 is formed between the two inner wall portions 21a. The inner wall portion 21 a projects beyond the outer wall portion 23 to the inside of the accommodation space. That is, the inner wall portion 21 a formed on the right wall 20 </ b> A is located on the left side of the outer wall portion 23. The rigidity of the right wall 20A can be improved. The protruding width of the convex portion 21 is, for example, larger than four times the thickness T1 of the cushioning material 1 (see FIG. 5), similarly to the convex portions 11 and 12 of the front wall 10A described above. When the cushioning material 1 is used, the right wall 20A supports the object P by the inner wall portion 21a.

  The convex portion 21 of the right wall 20 has a columnar shape, and has a side wall portion 21b (see FIG. 6A) that extends rightward from the front and rear edges of the inner wall portion 21a and is connected to the outer wall portion 23. The convex part 21 has the upper end wall part 21c (refer FIG. 6A) extended rightward from the upper edge of the inner wall part 21a. The rigidity of the right wall 20A can be improved by the upper end wall portion 21c. The height of the upper end wall portion 21c matches the height of the upper edge of the right wall 20A.

  As shown in FIG. 1, the left wall 20 </ b> B has a convex portion 22 and an outer wall portion 23. The convex part 22 protrudes inside the accommodation space, like the convex part 21 of the right wall 20A. Unlike the right wall 20A, the number of convex portions 22 in the left wall 20B is one. Accordingly, one convex portion 22 is formed between the two outer wall portions 23. Unlike the example of the cushioning material 1, the number of the convex portions 22 may be more than one. The convex portion 22 also has an inner wall portion 22a (see FIG. 3) extending upward from the bottom wall 30 and an upper end wall portion 22c (see FIG. 3) extending leftward from the upper edge of the inner wall portion 22a. Yes. The height of the upper end wall portion 22c matches the height of the upper edge of the left wall 20B. Unlike the example of the cushioning material 1, the structure of the left wall 20B may be the same as that of the right wall 20A.

  The conventional cushioning material has a flange (for example, a flange N indicated by a two-dot chain line in FIG. 4B) at the edge of the opening of the cushioning material. The flange is a portion extending from the edge of the opening of the cushioning material to the outside of the cushioning material and extending along the edge of the opening. The flange is formed over the entire circumference of the opening. On the other hand, the cushioning material 1 proposed in the present disclosure does not have a flange at the edge of the opening.

  That is, as shown in FIG. 4B, the front wall 10A and the rear wall 10B do not have a portion extending beyond the position of the outer wall portion 13 to the outside of the cushioning material 1 at their upper edge 10a. In other words, the front wall 10A does not have a portion extending forward beyond the position of the outer wall portion 13. Further, the rear wall 10B does not have a portion extending rearward beyond the position of the outer wall portion 13.

  Accordingly, the outer wall portion 13 is located at the foremost position in the front wall 10A, and the outer wall portion 13 is located at the most rearward position in the rear wall 10B. In the example of the cushioning material 1, the outer wall portion 13 is slightly inclined outward with respect to the vertical direction. Therefore, in the front wall 10A, the upper edge of the outer wall portion 13 (upper edge 10a of the front wall 10A) is located at the most front, and in the rear wall 10B, the upper edge of the outer wall portion 13 (upper edge 10a of the rear wall 10B) is the most. Located behind. Accordingly, when the cushioning material 1 is used, the outer wall portion 13 itself (including the upper edge of the outer wall portion 13) is in contact with the inner surface of the storage box.

  According to such a buffer material 1, the size of the storage box for storing the objects to be stored P can be reduced, and as a result, the transport efficiency of the objects to be stored P can be improved. In addition, the convex parts 11 and 12 mentioned above are formed in the front wall 10A and the rear wall 10B. Accordingly, sufficient rigidity can be secured in the cushioning material 1 without a flange.

  Thus, since the front wall 10A and the rear wall 10B do not have a flange, the upper end wall portion 11c of the two convex portions 11 arranged in the left-right direction with the outer wall portion 13 therebetween is the upper edge of the outer wall portion 13. They are connected to each other via (a part of the upper edge 10a). That is, when the front wall 10A and the rear wall 10B have flanges on the upper edge 10a, the upper end wall portions 11c of the two convex portions 11 arranged in the left-right direction are mutually connected via the upper edge and the flange of the outer wall portion 13. Will be connected. However, in the cushioning material 1, since the flange is not formed in the upper edge 10a of the front wall 10A and the rear wall 10B, the upper end wall part 11c of the two convex parts 11 mutually passes only through the upper edge of the outer wall part 13. Will be connected. The front wall 10 </ b> A has an outer wall portion 13 positioned between the first convex portion 11 and the second convex portion 12. The upper end wall portions 11 c and 12 c of the convex portions 11 and 12 are connected to each other through only the upper edge of the outer wall portion 13. The front wall 10 </ b> A may include an outer wall portion 13 positioned between the two second convex portions 12. And the upper end wall part 12c of the two convex parts 12 may be mutually connected only through the upper edge of the outer wall part 13. FIG.

  In addition, the upper edge of the outer wall part 13 is a part comprised by the outer wall part 13 among the upper edges 10a (namely, edge part of the material of the shock absorbing material 1). As will be described later, when the outer wall portion 13 is viewed in the direction along the outer wall portion 13 (arrow D, see FIG. 5), the thickness of the upper edge (T2, see FIG. 5) of the outer wall portion 13 is the outer wall portion 13. The thickness (T1) is substantially the same. Therefore, the cushioning material 1 does not have a portion connected to the upper edge of the outer wall portion 23 in the cross section of the outer wall portion 13. When the front wall 10A and the rear wall 10B have flanges, the edge of the opening (the opening opened upward) of the cushioning material 1 is separated from the edge of the outer wall portion 13 (the flange edge) by the width of the flange. Will be in position. However, in the cushioning material 1, the front wall 10 </ b> A and the rear wall 10 </ b> B do not have flanges. Will be.

  Note that the edges of the upper end walls 11 c and 12 c of the protrusions 11 and 12 (edges located on the side opposite to the inner walls 11 a and 12 a) move the upper edge of the outer wall 13 toward the outside of the cushioning material 1. Not exceeded. In the example of the cushioning material 1, the positions of the edges of the upper end wall portions 11 c and 12 c are the same as the positions of the upper edges of the outer wall portion 13. That is, the upper edge 10a of the front wall 10A is linearly formed along the left-right direction. The edges of the upper end wall portions 11c and 12c and the upper edge of the outer wall portion 13 are arranged in the left-right direction to form the upper edge 10a.

  Although no flange is formed on the upper edge 10a of the front wall 10A, as shown in FIG. 5, the upper edge 10a is slightly curved forward. The thickness T2 of the upper edge 10a obtained when the outer wall portion 13 is viewed in the direction along the outer wall portion 13 (the direction indicated by the arrow D in FIG. 5) is the thickness of the front wall 10A (the thickness of the outer wall portion 13). ) Although larger than T1, it is smaller than twice the thickness T1. Preferably, the thickness T2 is not more than 1.5 times the thickness T1. That is, the thickness T2 and the thickness T1 are substantially the same.

  As described above, the convex portions 11 and 12 are formed on the front wall 10A. The protrusion widths W1 and W2 (see FIGS. 4A and 4C) of the convex portions 11 and 12 are, for example, larger than three times the thickness T2 (see FIG. 5) of the upper edge 10a of the front wall 10A. The protruding widths W1 and W2 are preferably larger than four times the thickness T2 of the upper edge 10a of the front wall 10A. The protrusion widths W1 and W2 are more preferably larger than five times the thickness T2 of the edge 10a of the cushioning material 1. In the example of the cushioning material 1, the protrusion width W1 of the convex portion 11 is larger than, for example, six times the thickness T2 of the edge 10a of the cushioning material 1. Thus, since the protrusion width is relatively large, high shock-absorbing performance can be secured, and the rigidity of the front wall 10A can be secured even if the flange is not formed on the edge 10a. The protruding widths W1 and W2 of the convex portions 11 and 12 may be smaller than three times the thicknesses T1 and T2.

  As shown in FIG. 3, the right wall 20A also has no flange. That is, the right wall 20A has a portion that extends to the outside of the cushioning material 1 beyond the position of the outer wall portion 23 (in other words, a portion that extends to the right beyond the position of the outer wall portion 23). 20a does not have. Therefore, the outer wall portion 23 is located on the rightmost side in the right wall 20A.

  The outer wall portion 23 is inclined toward the outside of the cushioning material 1 (toward the right side). Therefore, in the right wall 20A, the upper edge of the outer wall portion 23 (the upper edge 20a of the right wall 20A) is located on the rightmost side. As a result, when the cushioning material 1 is used, the outer wall portion 23 (including the upper edge of the outer wall portion 23) contacts the inner surface of the storage box. As shown in FIG. 6A, the right edge of the upper end wall portion 21c of the convex portion 21 does not exceed the position of the outer wall portion 23, and the upper edge 20a of the right wall 20A is formed linearly along the front-rear direction. ing.

  Thus, since the right wall 20A does not have a flange, the upper end wall portion 21c of the two convex portions 21 arranged in the front-rear direction with the outer wall portion 23 in between is an upper edge (upper edge 20a) of the outer wall portion 23. Part of each other). That is, when the right wall 20A has a flange on the upper edge 20a, the upper end wall portions 21c of the two convex portions 21 arranged in the front-rear direction are connected to each other via the upper edge of the outer wall portion 23 and the flange. It becomes. However, in the cushioning material 1, since the flange is not formed in the upper edge 20a of the right wall 20A, the upper end wall part 21c of the two convex parts 21 is connected to each other only through the upper edge of the outer wall part 23. It becomes.

  The upper edge of the outer wall portion 23 is a part of the upper edge 20a of the right wall 20A (that is, the end portion of the material of the cushioning material 1). Therefore, the cushioning material 1 does not have a portion connected to the upper edge of the outer wall portion 23 in the cross section of the outer wall portion 23. When the right wall 20A has a flange, the edge of the opening (the opening opened upward) of the cushioning material 1 is located away from the edge of the outer wall 23 (the flange edge) by the width of the flange. It will be. However, since the right wall 20A does not have a flange in the cushioning material 1, the upper edge of the outer wall portion 23 constitutes a part of the edge of the opening (opening upward) of the cushioning material 1. .

  Similarly to the thicknesses T1 and T2 of the front wall 10A described with reference to FIG. 5, the thickness of the upper edge 20a obtained when the outer wall portion 23 is viewed in the direction along the outer wall portion 23 of the right wall 10A. The thickness is smaller than twice the thickness of the right wall 20A (the thickness of the outer wall portion 23). Preferably, the thickness of the upper edge 20a is not more than 1.5 times the thickness of the right wall 20A (the thickness of the outer wall portion 23). Moreover, the protrusion width | variety of the convex part 21 is larger than 3 times the thickness of the upper edge 20a of 20 A of right walls, for example. This protrusion width is preferably larger than four times the thickness of the upper edge 20a of the right wall 20A.

  Similar to the right wall 20A, the left wall 20B also has no flange. That is, the left wall 20 </ b> B does not have a portion that extends beyond the position of the outer wall portion 23 to the outside of the cushioning material 1 (a portion that extends to the left).

  Thus, in the cushioning material 1, the flanges are not formed on the upper edges 10a, 20a of the four walls 10A, 10B, 20A, 20B. That is, the cushioning material 1 does not have a flange over the entire periphery of the edge of the opening. Unlike the example of the cushioning material 1, the front wall 10A and the rear wall 10B are not formed with flanges, but the right wall 20A and the left wall 20B may be formed with flanges.

  As shown in FIG. 1, the bottom wall 30 is also formed with a convex portion 31 projecting toward the inside of the accommodation space (projecting upward). As shown in FIG. 3, the convex portions 31 are arranged at intervals in the left-right direction. The bottom wall 30 has low wall portions (outer wall portions) 32 and 33 located between two adjacent convex portions 31. The convex portion 31 has a high wall portion (inner wall portion) 31 a located at a position higher than the low wall portions 32 and 33. In other words, the high wall portion 31 a is located inside the accommodation space with respect to the low wall portions 32 and 33. The high wall portion 31a and the low wall portions 32 and 33 are arranged in the left-right direction. That is, the low wall part 32 or the low wall part 33 is formed between two adjacent high wall parts 31a. With this structure, the rigidity of the bottom wall 30 is increased. As a result, although the flange is not formed at the edge of the opening of the cushioning material 1, the rigidity of the cushioning material 1 is ensured.

  As shown in FIG. 3, the low wall portion 32 is positioned higher than the low wall portion 33. That is, the low wall portion 32 is located inside the accommodation space with respect to the low wall portion 33. The position of the low wall portion 32 in the vertical direction is lower than that of the high wall portion 31a. When the cushioning material 1 is used, the object P is supported by the high wall portion 31a. Moreover, the low wall part 33 does not hit the inner surface of a storage box in the state which the low wall part 33 hits the inner surface of a storage box and the low wall part 33 does not deform | transform. Accordingly, for example, it is possible to suppress an excessively large force from acting on the object to be stored P as compared with a structure in which all the low wall portions 32 and 33 correspond to the inner surface of the storage box.

  As shown in FIG. 4B, the high wall portion 31a of the convex portion 31 continues from the front wall 10A to the rear wall 10B. More specifically, the high wall portion 31a of the convex portion 31 continues from the outer wall portion 13 of the front wall 10A to the outer wall portion 13 of the rear wall 10B. In the example of the cushioning material 1, the high wall portion 31 a of the convex portion 31 has a slope 31 e according to the outer shape of the object P to be stored. The slope 31e is inclined so as to increase from the rear side toward the front side. The high wall portion 31a has a horizontal portion 31f on the front side and the rear side of the slope 31e. Unlike the example of the cushioning material 1, the high wall portion 31a may not have such a slope 31e. That is, the high wall portion 31a may be formed horizontally. In still another example, the bottom wall 30 may not have two types of low wall portions 32 and 33 having different heights.

  As shown in FIG. 4A, a low wall portion 33 is formed between the inner wall portion 11a of the first convex portion 11 of the front wall 10A and the inner wall portion 11a of the first convex portion 11 of the rear wall 10B. Yes. As shown in FIG. 4C, a low wall portion 33 is formed between the inner wall portion 11a of the first convex portion 11 of the front wall 10A and the inner wall portion 11a of the first convex portion 11 of the rear wall 10B. Yes.

  As described above, when the cushioning material 1 is used, the object P is supported by the high wall portion 31a of the bottom wall 30 and the inner wall portion 11a of the first convex portion 11 of the front wall 10A and the rear wall 10B. . As shown in FIGS. 6A and 6B, the high wall portion 31a is connected to the inner wall portion 11a. And the recessed part E is formed in the connection part of the high wall part 31a and the inner wall part 11a. Therefore, when the cushioning material 1 is used, the object P does not hit the connection portion between the high wall portion 31a and the inner wall portion 11a. Thereby, it is possible to suppress an excessive force from acting on the edge of the object P.

  In the example of the cushioning material 1, the high wall portion 31a is formed between the outer wall portion 13 of the front wall 10A and the outer wall portion 13 of the rear wall 10B, and the position of the high wall portion 31a and the walls 10A, 10B The position of the inner wall portion 11a is shifted in the left-right direction. Therefore, the edge 31g (edge located at the end in the left-right direction) of the high wall 31a and the edge 31g (edge located at the end in the left-right direction) of the inner wall 11a are connected. Concave portions E are formed in these connecting portions (boundaries).

  In addition, instead of the recess E, a hole penetrating the cushioning material 1 may be formed in a connection portion between the high wall portion 31a and the inner wall portion 11a. Moreover, the position of the high wall part 31a and the position of the inner wall part 11a do not need to shift | deviate in the left-right direction. Also in this case, a groove may be formed as an example of the recess E in the connection portion between the high wall portion 31a and the inner wall portion 11a.

  As described above, the cushioning material 1 opens upward, and the front wall 10 </ b> A has the outer wall portion 13 and the inner wall portions 11 a and 12 a that protrude beyond the outer wall portion 13 to the inside of the accommodation space. The front wall 10A has no flange at the upper edge 10a. According to this structure, it is possible to improve the transportation efficiency of goods while suppressing the decrease in rigidity of the pulp mold cushioning material.

  Further, the front wall 10A has an outer wall portion 13 and an inner wall portion 11a projecting inside the accommodation space from the outer wall portion 13, and the outer wall portion 13 and the inner wall portions 11a and 12a are arranged in the left-right direction. The bottom wall 30 includes low wall portions 33 and 32 and a high wall portion 31a projecting inside the accommodation space from the low wall portion 33, and the low wall portions 33 and 32 and the high wall portion 31a are in the left-right direction. Are lined up. A recess E is formed at a connection portion between the outer wall portion 13 of the front wall 10 </ b> A and the high wall portion 31 a of the bottom wall 30. According to this structure, it can suppress that big force acts on the corner | angular of the to-be-contained object P. FIG.

  The pulp mold cushioning material proposed in the present disclosure is not limited to the cushioning material 1 described above, and various modifications are possible. For example, as described above, the size and shape of the cushioning material 1 may be changed as appropriate. For example, for example, the cushioning material 1 includes only the front wall 10A, the bottom wall 30, and the rear wall 10B, and may not include the walls 20A and 20B. As another example, the cushioning material 1 may have only the front wall 10 </ b> A, the right wall 20 </ b> A, and the bottom wall 30.

  DESCRIPTION OF SYMBOLS 1 Pulp mold shock absorbing material, E recessed part, P to-be-contained object, 10A front wall, 10B rear wall, 10a upper edge, 11 convex part, 11a inner wall part, 11b side wall part, 11c upper end wall part, 12 convex part, 12a inner wall part , 13 Outer wall part, 20A Right wall, 20B Left wall, 20a Upper edge, 21 Convex part, 21a Inner wall part, 21b Side wall part, 21c Upper end wall part, 22 Convex part, 22a Inner wall part, 22c Upper end wall part, 23 Outer wall part , 30 Bottom wall, 31a High wall part, 31 Convex part, 31e Slope, 31f Horizontal part, 32 Low wall part, 33 Low wall part, II arrow.

Claims (13)

A pulp mold cushioning material having a plurality of main walls that define an accommodation space in which an article is placed and has an opening that is open in a first direction,
The plurality of main walls have a first main wall;
The first main wall has a first outer wall portion and a first inner wall portion projecting inside the housing space from the first outer wall portion, and the first outer wall portion and the first inner wall portion are Arranged in a second direction orthogonal to the first direction,
The first main wall has an edge extending in the second direction at an end of the first main wall in the first direction;
The first main wall does not have a flange at the edge. Pulp mold cushioning material. A pulp mold cushioning material having a plurality of main walls that define an accommodation space in which an article is placed and has an opening that is open in a first direction,
The plurality of main walls have a first main wall;
The first main wall includes: a first outer wall portion; and at least two first convex portions having a first inner wall portion projecting inward of the housing space from a position of the first outer wall portion. Have
The first outer wall portion is located between the at least two first convex portions, and is aligned with the at least two first convex portions in a second direction orthogonal to the first direction,
The first outer wall has a first edge located at an end of the outer wall in the first direction and being part of an edge of the opening;
Each of the at least two first convex portions has an end wall portion located at an end portion of the first inner wall portion in the first direction;
The pulp mold cushioning material, wherein the end wall portions of the at least two first convex portions are connected to each other via the first edge portion of the first outer wall portion. The thickness of the edge portion when the first main wall is viewed in a direction along the first main wall is smaller than 2.0 times the thickness of the first outer wall portion. The pulp mold buffer material according to 1. The first main wall has a first convex portion that has the first inner wall portion and protrudes more inside the housing space than the first outer wall portion,
The protrusion width of the first convex portion is larger than three times the thickness of the edge portion when the first main wall is viewed in a direction along the first main wall. The pulp mold cushioning material described in 1. The plurality of main walls include a second main wall that is located on a side opposite to the first direction with respect to the first main wall and is connected to the first main wall;
The second main wall has a second outer wall portion and a second inner wall portion projecting inside the housing space from the second outer wall portion,
The pulp mold cushioning material according to claim 1 or 2, wherein the second outer wall portion and the second inner wall portion are arranged in the second direction. The plurality of main walls include a third main wall located in the second direction with respect to the first main wall and connected to the first main wall;
The third main wall has an edge extending in a third direction orthogonal to both the first direction and the second direction at an end of the third main wall in the first direction. Have
The pulp mold cushioning material according to claim 1 or 2, wherein the third main wall has no flange at the edge. The plurality of main walls include an opening edge including the edge of the first main wall and opening in the first direction;
The pulp mold cushioning material according to claim 1 or 2, wherein a flange is not formed over the entire circumference of the opening edge. The first main wall has a first convex portion that protrudes inside the accommodation space and has the first inner wall portion,
The pulp mold cushioning material according to claim 1, wherein the first convex portion has an end wall portion that extends from the first inner wall portion to the outside of the accommodation space. The pulp mold cushioning material according to claim 5, wherein at least one of a concave portion and a hole is formed in a connection portion between the first inner wall portion and the second inner wall portion. The first main wall has, as the first inner wall portion, a 1-1 inner wall portion and a 1-2 inner wall portion located inside the accommodation space with respect to the 1-1 inner wall portion. The pulp mold cushioning material according to claim 1 or 2, wherein: The end wall portions of the at least two first protrusions extend in a third direction orthogonal to both the first direction and the second direction from the first inner wall portion,
The end wall has an edge located at an end in the third direction;
The pulp mold cushioning material according to claim 2, wherein the edge portion of the end wall portion is aligned with the edge portion of the outer wall portion in the second direction. A storage space that is open in the first direction and in which the objects to be stored are disposed;
A pulp mold cushioning material having a plurality of main walls defining the accommodation space,
The plurality of main walls include a first main wall and a second main wall that is located in a direction opposite to the first direction with respect to the first main wall and is connected to the first main wall. And
The first main wall includes a first outer wall portion, and a first inner wall portion that protrudes to the inside of the housing space from the first outer wall portion, and the first outer wall portion and the first inner wall portion are Arranged in a second direction orthogonal to the first direction,
The second main wall has a second outer wall portion, and a second inner wall portion that protrudes to the inside of the accommodation space from the second outer wall portion, and the second outer wall portion and the second inner wall portion are Aligned in the second direction,
A pulp mold cushioning material, wherein a concave portion or a hole is formed in a connection portion between the first inner wall portion and the second inner wall portion. The position of the first inner wall portion and the position of the second inner wall portion are shifted in the second direction, and the concave portion or the gap is between the edge of the first inner wall portion and the edge of the second inner wall portion. The hole is formed. The pulp mold shock absorbing material according to claim 10 characterized by things.

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