JP3756174B1 - Packing cushioning material - Google Patents

Abstract

In a cushioning material for packing integrally molded by a pulp mold, a desired cushioning effect can be exhibited.
The cushioning materials 1 and 2 are used when packing a relatively thin and small article, and the article is sandwiched between the cushioning materials 1 and 2. The shock-absorbing materials 1 and 2 each have a base 3 and a plurality of protrusions 5 that protrude from the surface 4 (one side surface) of the base 3 and receive articles. The protrusion 5 includes a skirt part 8 and a tip part 9 (top part). The tip portion 9 has a shape in which approximately half of the protrusion (hemispherical surface) that protrudes in a hemispherical shape is cut in the vertical direction to form an opening on one side.
[Effect] The crushing load of the protrusion 5 can be kept within a certain range.
[Selection] Figure 3

Description

  The present invention relates to a cushioning material for packing formed by a pulp mold.

Usually, a small and thin article such as a circuit board used in a printer is accommodated in a packing box while being sandwiched between packing cushioning materials. As such a cushioning material, a chemical product such as polystyrene foam has been used, but in recent years, a pulp mold product using waste paper, pulp or the like has been used to protect the global environment (see, for example, Patent Document 1). .
In Patent Document 1, two cushioning materials are prepared, and an article is sandwiched between the two cushioning materials. Specifically, each buffer material includes a plurality of conical cap-shaped portions, and the plurality of cap-shaped portions are arranged in a lattice shape. Prior to sandwiching the article, some of the cap-shaped parts are crushed by a press device. As a result, when the two cushioning materials are stacked one above the other, a storage space for storing the article is defined.
JP-A-6-263121

Since the cap-shaped part is so hard that it needs to be crushed by using a press device, there is a possibility that a sufficient buffering effect cannot be expected. Moreover, since the operation | work which crushes a cap-shaped part previously is required, it takes an effort.
Therefore, it is conceivable to prepare a cushioning material using a pulp mold having a plurality of hemispherical protrusions that are thinly formed so as to be easily deformed, and sandwich the article vertically using two of the cushioning materials. . As a result, when the article is sandwiched between the upper and lower parts, the protrusion is elastically deformed so as to become familiar with the article, and a sufficient buffering effect can be exhibited.

  However, a pulp mold is a molded product that can be obtained by dissolving waste paper or pulp in water and liquefying them with a wire mesh attached to a mold, and the control performed at the time of molding controls the lifting time of the wire mesh ( Only adjustment of suction time). For this reason, it is difficult to make the rigidity (shape) of each projection uniform with high accuracy. As a result, the load (crush load) required to be elastically deformed by pressing the projection can vary greatly, and the desired buffer effect may not be exhibited.

The present invention has been made under such a background, and an object of the present invention is to provide a packing cushioning material that can exhibit a desired cushioning effect.
Another object of the present invention is to provide a packing cushioning material that can reduce the time and effort required for packing work.

  In order to achieve the above object, the invention according to claim 1 is a packing cushioning material (1; a plurality of protrusions (5; 5A; 5B)) that is integrally formed by a pulp mold and sandwiches an article (100) during packing. 1A, 2A), and the protrusion has a shape in which an approximately half of the protrusion that protrudes into a hemispherical shape is cut in the vertical direction (UD) to form an opening on one side. It is the buffer material for packing characterized by the above-mentioned.

In addition, the alphanumeric characters in parentheses represent corresponding components in the embodiments described later. The same applies hereinafter.
According to this configuration, when forming a cushioning material for packing with a pulp mold, control is performed so that the crushing load of the protrusion (the load necessary for elastic deformation by pressing the tip of the protrusion) is within a certain range. It is possible to stabilize the performance and quality as a cushioning material for packing. Thereby, the crushing load of the protrusion when the article is sandwiched during packing can be set to a desired value, and a desired buffering effect can be exhibited. Also, when the article is sandwiched between packing cushioning materials, the protrusions are elastically crushed so as to conform to the article, so there is no need to squeeze the protrusions according to the shape of the article in advance, thereby reducing the labor involved in the packing operation. be able to.

The invention according to claim 2 is characterized in that a long hole (11) or a thin part (12) having a predetermined width (W) is formed in the protrusion from the skirt toward the tip. It is the buffer material for packing of description.
According to this configuration, it is possible to stabilize the initial pressing crush load of the protrusion (the load when the tip of the protrusion is pressed and starts elastic deformation) within a certain range.

According to a third aspect of the present invention, in the projection arranged along the outline (6) of the packing cushioning material, the side on which the opening (10, 10A, 10B) is formed is the inner side of the packing cushioning material. The packing cushioning material according to claim 1 or 2, wherein:
According to this configuration, the article sandwiched between the packing cushioning materials can be received at the edge of the opening of the protrusion arranged along the contour. As a result, the sandwiched article can be made difficult to go out, and the article can be stably sandwiched.

Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a plan view showing a schematic configuration of a cushioning material for packing according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view taken along line AA in FIG. FIG. 3 is a perspective view of the packing cushioning material of FIG. In FIG. 1, the penetration part of the packing cushioning material is shown by hatching.
Referring to FIG. 1, packing cushioning materials 1 and 2 (hereinafter simply referred to as cushioning materials) are used when packaging an article (not shown), and cushioning materials 1 and 2. The article is held between the upper and lower sides. The article to be sandwiched between the buffer materials 1 and 2 is a thin and small article having a thickness of about 10 mm to 30 mm, such as a circuit board provided in an image forming apparatus such as a copying machine.

The buffer materials 1 and 2 are integrally formed by a pulp mold. The pulp mold refers to a paper molded product obtained by dissolving waste paper, pulp, or the like with water to form a liquid, which is then picked up with a wire mesh attached to a mold having a predetermined shape and dried.
The cushioning material 1 and the cushioning material 2 can be separated by cutting along the cutting line L. The buffer material 1 and the buffer material 2 may be formed separately from the beginning. Moreover, since the shock absorbing material 1 and the shock absorbing material 2 have the same structure, the buffer material 1 is mainly demonstrated below.

The cushioning material 1 has a thickness of 1 to 3 mm (in this embodiment, 1.2 mm), for example, and a plurality of bases 3 and a plurality of members for projecting from the surface 4 (one side surface) of the base 3 to receive articles. Projection 5.
The base 3 is formed in a substantially rectangular shape in plan view and has a substantially rectangular outline 6. A region of the base 3 excluding the vicinity of the contour 6 is a rectangular sandwiching region 7.

  Each protrusion 5 is arranged in the clamping region 7. Specifically, the protrusions 5 are arranged at substantially equal intervals along one outline 6a of the base 3 and an outline 6b orthogonal to the outline 6a. For example, the cushioning material 1 is provided with 15 projections 5, and the cushioning material 2 is provided with eight projections 5. In addition, the number of the protrusions 5 of the buffer material 1 and the number of the protrusions 5 of the buffer material 2 may be different or the same.

2 and 3, the protrusion 5 includes a skirt portion 8 and a tip portion 9 (top portion). Hereinafter, the term “upper” or “lower” refers to the upper or lower part along the vertical direction UD in FIG.
The skirt portion 8 includes a first portion 81 extending upward from the surface 4 of the base 3 and a second portion 82 extending upward from the upper end portion of the first portion 81.

The first portion 81 is formed in a truncated cone shape, and a diameter C of a lower end portion connected to the base 3 is, for example, 40 mm or more (in this embodiment, 40 mm). Thereby, the protrusion 5 having a sufficient size can be formed, and the elasticity of the protrusion 5 can be sufficiently secured.
The shape of the second portion 82 is such that half of the peripheral surface of the truncated cone is cut off by a plane P parallel to the vertical direction (up and down direction UD) and an opening is formed on one side.

The distal end portion 9 protrudes upward from the upper end portion of the second portion 82 of the skirt portion 8. The shape of the tip 9 (tip shape of the protrusion 5) is such that approximately half of the protrusion (hemispherical surface) that protrudes upward in a hemispherical shape is cut off by a plane P parallel to the vertical direction and is formed on one side. It has a shape in which an opening is formed. The tip portion 9 includes a vertex 91.
With the above configuration, the protrusion 5 has the opening 10 defined by the upper end edge of the first portion 81 of the skirt portion 8, the edge of the second portion 82, and the edge of the distal end portion 9.

A long hole 11 is formed in the protrusion 5 on the opposite side to the opening 10. The long hole 11 is used to keep the initial crushing load (the load when the tip 9 is pressed downward and elastic deformation starts) of the protrusion 5 within a certain range.
The long hole 11 extends in the longitudinal direction from the hem of the protrusion 5 toward the tip (from the lower end of the second portion 82 of the skirt 8 toward the vertex 91 of the tip 9). It is interrupted. The width W of the long hole 11 is set to a predetermined value, and this value continuously decreases from the bottom of the protrusion 5 toward the tip.

The maximum value of the width W of the long hole 11 is, for example, 4 mm or more (4 mm in this embodiment). By setting the maximum value of the width W of the long hole 11 in this way, it is possible to prevent the long hole 11 from being blocked when the cushioning material 1 is formed with a pulp mold. It can be reliably formed.
The protrusions 5 arranged along the contour 6 of the base 3 (the cushioning material 1), that is, the projections 5 arranged on the outermost side of the base 3 have a side where the opening 10 is formed on the cushioning material 1 side. It is made to face inward.

Packaging of articles using the cushioning materials 1 and 2 having the above-described schematic configuration is performed as follows. That is, as shown in FIG. 4, the cushioning materials 1 and 2 are separated by a cutting line and separated, and the cushioning material 1 is disposed below the article 100, and the cushioning material 2 is disposed above the article 100, The sandwiching regions (surfaces 4) of these cushioning materials 1 and 2 are opposed to each other vertically.
Then, the article 100 is sandwiched between the buffer materials 1 and 2. As a result, of the protrusions 5 of the cushioning materials 1 and 2, the protrusion 5 that vertically faces the article 100 is elastically deformed by the tip portion 9 being pressed against the article 100, and has a shape that fits the article 100.

At this time, the outer peripheral portion 100a of the article 100 is opposed to the edge of the opening 10 of the protrusion 5 arranged along the outline 6 of the cushioning materials 1 and 2, and can be received by this edge. Thereby, the article 100 is prevented from coming out of the cushioning materials 1 and 2. In this state, the cushioning materials 1 and 2 and the article 100 are put in a packing box (not shown), and the packing of the article 100 is completed.
As described above, according to this embodiment, the shape of the tip 9 of the protrusion 5 is substantially half of the protrusion (hemispherical surface) that is curved in a hemispherical shape, and an opening is formed on one side. The shape is made. Thereby, when making the buffer materials 1 and 2 with a pulp mold, the crushing load of the protrusion 5 (the load necessary for elastically deforming the tip portion 9 of the protrusion 5 by pressing) is within a certain range. It can be controlled and the performance and quality as a cushioning material for packing can be stabilized.

Thereby, the crushing load of the protrusion 5 when the article 100 is sandwiched during packaging can be set to a desired value, and a desired buffering effect can be exhibited.
Further, when the article 100 is sandwiched between the cushioning materials 1 and 2, the protrusion 5 is elastically crushed so as to become familiar with the article 100. Therefore, it is not necessary to squeeze the protrusion 5 according to the shape of the article 100 in advance. Can be reduced.

Furthermore, by forming the long hole 11 in the protrusion 5, the initial pressing crush load of the protrusion 5 can be stabilized within a certain range. Moreover, the elasticity of the protrusion 5 can be improved and the protrusion 5 can be easily crushed. Further, the direction in which the protrusion 5 is crushed can be guided in a desired direction.
As a result, the initial pressing crush load in one protrusion 5 can be stored within a narrow range of 700 g to 1200 g (500 g), for example, and the variation in the initial pressing crush load can be sufficiently reduced. In addition, the initial pressing crush load of the protrusion when the tip is simply formed in a hemispherical shape and provided with a long hole varies within a large range of, for example, 800 g to 2500 g (1700 g). Therefore, the effect which suppresses the dispersion | variation in the initial crushing load obtained by using the protrusion 5 of this embodiment is large.

  Further, the protrusions 5 arranged along the contours 6 of the cushioning materials 1 and 2 are oriented so that the side on which the opening 10 is formed is inside the cushioning materials 1 and 2. Thereby, the article 100 sandwiched between the cushioning materials 1 and 2 can be received by the edge of the opening 10 of the protrusion 5 arranged along the contour 6. As a result, the sandwiched article 100 can be made difficult to go outside, and the article 100 can be stably sandwiched.

  In this embodiment, the long holes 11 may not be provided only in the protrusions 5 arranged along the contours 6 of the cushioning materials 1 and 2. Accordingly, the protrusions 5 arranged along the contour 6 are hardly crushed, and the article 100 can be easily opposed to the edge of the opening 10 of the protrusion 5 arranged along the contour 6. As a result, it is possible to make it difficult for the article 100 to be taken out from the outside of the buffer materials 1 and 2.

Further, the number of the long holes 11 of each protrusion 5 is not limited to one, and may be two or more, and can be selected according to the set value of the crushing load of the protrusion 5. Furthermore, the second portion 82 of the skirt portion 8 of the protrusion 5 may be eliminated, and the tip portion 9 may be provided directly above the first portion 81 of the skirt portion 8.
FIG. 5 is a plan view showing cushioning materials 1A and 2A according to another embodiment of the present invention. In the following, differences from the embodiment shown in FIGS. 1 to 4 will be mainly described, and the same components are denoted by the same reference numerals and the description thereof will be omitted.

  Referring to FIG. 5, the cushioning materials 1 </ b> A and 2 </ b> A have the same number of protrusions 5 provided on each. For example, the number of protrusions 5 of the cushioning materials 1A and 2A is 15 respectively. Further, the position of the protrusion 5 with respect to the base 3 in the buffer material 1A and the position of the protrusion 5 with respect to the base 3 in the buffer material 2A are the same. Thus, when the surface 4 of the base 3 of the cushioning material 1A and the surface 4 of the base 3 of the cushioning material 2A are opposed to each other, the projections 5 of the cushioning material 1A and the corresponding projections 5 of the cushioning material 2A are moved up and down. It is trying to face.

As shown in FIGS. 5 and 6, when the protrusions 5 of the buffer material 1 </ b> A and the corresponding protrusions 5 of the buffer material 2 </ b> A are vertically opposed, the direction in which the opening 10 faces is reversed. The edge of the opening 10 of each protrusion 5 of the buffer material 1A and the edge of the opening 10 of the corresponding protrusion 5 of the buffer material 2A can be opposed to each other.
Thereby, the edge of the opening 10 of each protrusion 5 of the buffer material 1A and the edge of the opening 10 of the corresponding protrusion 5 of the buffer material 2A can face each other. As a result, when the article is sandwiched between the cushioning materials 1A and 2A, the edges of the openings 10 of the protrusions 5 that are not engaged with the article are engaged with each other, so that inadvertent movement of the article can be suppressed.

  FIG. 7 is a plan view showing the main part of still another embodiment of the present invention. Referring to FIG. 7, the shape of tip portion 9A of protrusion 5A is such that the protrusion (hemispherical surface) that protrudes in a hemispherical shape extends in two planes P1 and P2 extending in the vertical direction UD (direction perpendicular to the paper surface). It is cut out and has an opening formed on one side. The two planes P1 and P2 intersect at the vertex 91A of the protrusion 9A.

An angle D between the one plane P1 and the other plane P2 on the side where the opening 10A is not formed is set to 120 ° to 240 °, for example (in FIG. 7, the angle D is about 120 °). When the angle D is 180 °, the projection 5 of the embodiment shown in FIGS.
Here, “substantially half of the hemispherical protrusion is cut off in the vertical direction” means that “the two protrusions curved in the hemispherical shape extend in the vertical direction and intersect at the apex of the protrusion P1. , P2 ”, and the angle D formed by the planes P1 and P2 at this time is, for example, 120 ° to 240 °.

Also in this case, the same effect as the embodiment shown in FIGS. 1 to 4 can be obtained.
The present invention is not limited to the contents of the above embodiments, and various modifications can be made within the scope of the claims.
For example, as shown in FIG. 8, a thin portion 12 may be provided instead of the long hole 11. The thin portion 12 is formed thinner than other portions of the protrusion 5B.

  Further, each of the protrusions 5, 5 </ b> A, 5 </ b> B may have the openings 10, 10 </ b> A, 10 </ b> B directed in any direction with respect to the circumferential direction. Further, the long hole 11 and the thin portion 12 may be eliminated.

It is a top view which shows schematic structure of the shock absorbing material for packing concerning one Embodiment of this invention. It is a longitudinal cross-sectional view which follows the AA line of FIG. It is a perspective view of the cushioning material for packing of FIG. It is an illustration side view of the principal part for demonstrating the mode at the time of packing articles | goods using a buffer material. It is a top view which shows the shock absorbing material of another embodiment of this invention. It is a side view for demonstrating a mode when buffer materials are made to oppose. It is a top view which shows the principal part of another embodiment of this invention. It is a longitudinal cross-sectional view which shows the principal part of another embodiment of this invention.

Explanation of symbols

1, 1A, 2, 2A Packing cushioning material 5, 5A, 5B Protrusion 6 Outline 10, 10A, 10B Opening 11 Long hole 12 Thin part 100 Article UD Vertical direction (vertical direction)
W width

Claims (3)

A cushioning material for packing which is integrally formed by a pulp mold and has a plurality of protrusions for sandwiching an article during packing,
The cushioning material for packing, wherein the protrusion has a shape in which an approximately half of the protrusion protruding into a hemispherical shape is cut off in a vertical direction and an opening is formed on one side.   2. The packing cushioning material according to claim 1, wherein a long hole or a thin part having a predetermined width is formed on the protrusion from the skirt toward the tip.   The packing cushioning material according to claim 1 or 2, wherein the projection arranged along the outline of the packing cushioning material has an opening formed on the inside of the packaging cushioning material.

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