JP2601381Y2 - Cushioning material - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning material. More specifically, the present invention can effectively cover a material having a non-flat surface (irregular or curved).
Also, the present invention relates to a cushioning material that can protect from a relatively large impact.

[0002]

2. Description of the Related Art Conventionally, there has been known a corrugated cardboard having a buffering effect for preventing damage when carrying a curing plate or an article. In particular, to protect heavy objects and easily breakable items such as
Plastic cardboard which has high rigidity and therefore is strong against impact and has a high cushioning effect is suitable. However, conventional plastic cardboard cannot be easily bent due to its high rigidity, and therefore has an uneven surface or a curved surface,
When covering a material to be buffered such as a member or a structural material, a space is generated between the material to be buffered and the material to be buffered. As a result, the entire volume is increased, which makes it difficult to move the cushioned material in a narrow place.

As a cushioning material having excellent shock resistance and a high cushioning effect, there is a foamed resin sheet in addition to the above-mentioned plastic cardboard, but when a highly foamed resin sheet is used for a relatively large shock absorbing application. Must be made quite thick, and it becomes bulky.For example, when curing the opening of an elevator when moving, the frontage of the elevator becomes narrower, which causes obstacles such as difficulty in loading and unloading luggage. Would.

In order to reduce the thickness, it is necessary to lower the expansion ratio. However, this inevitably increases the rigidity and makes it impossible to bend, resulting in the above-mentioned problem. .

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and is intended to increase the number of cushioned materials such as articles, members, and structural materials having uneven or curved surfaces. It is possible to cover effectively without requiring extra space, and to cure the peripheral wall of the transfer passage for articles without spending extra space. It is an object of the present invention to provide a cushioning material capable of protecting a cushioned material from a large impact. That is, the cushioning material of the present invention comprises a surface layer portion, a back layer portion disposed at a predetermined distance from the surface layer portion, and an isolated body provided by connecting the two layer portions between the two layer portions. A cushioning material in which a gap is formed between the two layer portions, wherein a layer on a side facing the surface layer portion and / or the back layer portion of the cushioning material with the gap and / or the isolator interposed therebetween Are provided with parallel cuts which do not reach.

In the cushioning material, at least one of the surface layer portion and the back layer portion may be composed of two layers, and the outermost layer may be a foamed resin sheet.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. The drawings show one embodiment of the present invention, and FIG. 1 is an oblique sectional view showing an example of the cushioning material of the present invention.

As shown in FIG. 1, for example, the cushioning material of the present invention comprises a surface layer portion 2, a back layer portion 3 arranged at a predetermined distance from the surface layer portion 2, and the two layer portions 2 and 3. A wall-shaped isolation body 4 provided between the two layer portions is integrally formed therebetween, and a gap 5 is formed between the two layer portions 2 and 3 so that the surface layer portion 2 and The cuts 6 reaching the gap 5 but not reaching the back layer 3 and the cuts 6 reaching the gap 5 but not reaching the surface layer 2 are alternately and parallel to each other in the back layer 3. Many are provided at equal pitches and at equal intervals.

The size (length, width, thickness) of the cushioning material 1 is appropriate, but the thickness is usually about 3 to 20 mm.

The thickness of the surface layer portion 2 and the back layer portion 3 is appropriate, but usually 15 μm to 15 μm so that the portion facing the cut 6 and not reaching the cut 6 can be easily bent by human power. The thickness is about 2 mm, and preferably 200 μm to 1 mm.

The isolation body 4 can connect the surface layer portion 2 and the back layer portion 3 at a predetermined interval, and may be provided with a gap 5 between the two layers. Any shape such as a cylindrical shape irrespective of the uniform shape and a columnar shape regardless of the shape may be used. The mode of arrangement of the isolated bodies 4 may be any arrangement, but is preferably arranged regularly, for example, in a staggered manner.

As the material of the surface layer portion 2, the back layer portion 3, and the insulating body 4, a plastic such as a polyolefin resin, which has good hinge properties and is not easily broken even when bent, is preferable.
Particularly preferred are high-density polyethylene and polypropylene.

The cut 6 may be provided in a portion of the surface layer 2 and / or the back layer 3 where the isolation body 4 exists. In this case, the cut 6 is preferably at a depth that divides the isolation body 4. In addition, the cut 6 may be provided so as to straddle a portion with the isolation body 4 and a portion without the isolation body 4 in one cushioning material. Further, for example, when the cushioning material is rectangular, the cutouts 6 may be provided obliquely to the sides of the cushioning material as long as the cutouts 6 are parallel to each other.

The cut 6 may be a slit having almost no width, or may have a width, and the width may be appropriate. Also, the depth of the cut 6 need not reach the layer on the opposite side across the gap 5 and / or the isolator 4, and may be, for example, a wound having a V-shaped cross section or a scratch having a marking level. However, in the case of such a wound, the cushioning material 1
Must be broken when it is manually bent at a portion corresponding to the position of the flaw-shaped cut 6.

The depth of the notch 6, which can be relatively easily bent by human power, is set at a position opposite to the notch 6 and at a position where the notch 6 does not reach (a surface layer or a back layer, or, in some cases, a portion thereof). (Including an isolated body). The bending strength depends on the material and the thickness of the portion facing the cut 6 and not reaching the cut 6 (including the surface layer, the back layer, or, in some cases, the insulator).

In the present invention, the surface layer 2 and the back layer 3 and the isolation body 4 may be all integral or separate. Further, the surface layer portion 2 and the isolation body 4 may be integrated and the back layer portion 3 may be separate, or the isolation layer 4 and the back layer portion 3 may be integrated and the surface layer portion 2 may be separate. Alternatively, a part of the surface layer 2 and / or
Alternatively, a part of the back layer 3 may be integrated with the isolation body 4. When the surface layer portion 2, the back layer portion 3, the isolation body 4, or a part thereof is configured as a separate body, the respective materials may be different.

In the present invention, the surface layer 2 and / or the back layer 3 may be composed of two layers, and the outermost layer of the cushioning material may be a foamed resin sheet. When the outermost layer is a foamed resin sheet and the cut 6 is provided on the laminated sheet side, the cut 6 exists at least on the surface of the foamed resin sheet. In this case, of course, the cut 6 is formed from the surface of the foamed resin sheet to a depth such that it does not reach a layer adjacent thereto with a layer, a gap and / or an isolator therebetween. As the material of the foamed resin sheet, the same material as the surface layer 2 and the back layer 3 can be used. The density of the foam sheet is 0.2 ~
The one having about 0.01 g / cm ³ is used.

In the cushioning material 1 according to the present invention, a predetermined space is provided between the surface layer 2 and the back layer 3, and a gap between the surface layer 2 and the back layer 3 is formed. May be further provided with one or more intermediate layers. This embodiment will be described with reference to FIG. 1 in a state where two or more cushioning materials 1 of FIG. 1 are stacked, and a layer corresponding to a surface layer portion or a back layer portion located therebetween is an intermediate layer. Becomes However, in this case, if the cut 6 is not in the intermediate layer, the bending cannot be performed. Therefore, it is necessary to form the cut 6 in the intermediate layer.

Next, another example of the cushioning material of the present invention will be described. 2 and 3 are oblique sectional views showing another example of the cushioning material of the present invention.

As another example of the cushioning material 1 of the present invention, as shown in FIG.
2 and a flat sheet 31
The surface layer portion 2 composed of the laminated sheet 23 and the convex upper surface layer 71 of the concave-convex sheet 7, and the concave lower surface layer of the flat sheet 31 and the concave-convex sheet 7 72 are connected to each other by an isolator 4 composed of a rising portion 73 of the uneven sheet 7, and a rectangular parallelepiped gap 5 is alternately formed between the surface layer 2 and the back layer 3 at the same pitch. And are formed at equal intervals. In the surface layer portion 2 and the back layer portion 3, parallel slit-shaped cuts 6 which reach the gap 5 but do not reach the layer on the opposite side of the gap 5 are alternately formed at an equal pitch. It is provided at intervals.

As another example of the cushioning material 1 of the present invention, as shown in FIG. 3, the surface layer portion 2 and the back layer portion 3 each composed of two concave and convex sheets 7a and 7b are superposed, Layer 2 composed of the convex upper surface layer 7a1 of the sheet-like sheet 7a
And the back surface layer 3 composed of the concave lower surface layer 7b1 of the concave-convex sheet 7b are connected by an insulating body 4 composed of a rising portion 7a2 of the concave-convex sheet 7a and a rising portion 7b2 of the concave-convex sheet 7b. The rectangular parallelepiped gaps 5 are alternately formed at equal pitches between the and the back layer portion 3.
In the surface layer portion 2 and the back layer portion 3, parallel slit-shaped cuts 6 which reach the gap 5 but do not reach the layer on the opposite side of the gap 5 are alternately formed at an equal pitch. It is provided at intervals.

In the case of the above embodiment, the uneven sheet 7
The intermediate layer 8 is composed of the concave lower surface layer 7a3 of FIG. 7A and the convex upper surface layer 7b3 of the uneven sheet 7b.

In the present invention, in any of the embodiments described above with reference to FIGS. 2 to 3, the uneven shape, pitch, and interval of the uneven sheet 7 are appropriate, and the gap 5 is accordingly limited to a rectangular parallelepiped. Instead, any form can be adopted. Examples of the shape of the uneven sheet 7 including the uneven shape, the pitch, the interval, etc.
Examples thereof include those having a substantially semi-cylindrical shape, in which irregularities having a length in a direction perpendicular to the cut surface are continuous in parallel with the cut surface. Further, as the uneven sheet, as shown in FIG. 4, for example, a sheet in which substantially hemispherical projections p are arranged at predetermined intervals on a plane may be employed. In this case, the top portion t of the convex portion p is laminated and integrated with the surface layer portion 2 or the back layer portion 3, and the other portion s is configured as the isolation body 4. Then, the flat portion Q can be used as the surface layer portion 2 or the back layer portion 3 as it is.

In the embodiment shown and described above with reference to FIG. 4 as the concavo-convex sheet 7, the shape of the convex portion p is not limited to the above-described substantially hemispherical shape, but may be any shape such as a substantially elliptical shape or a substantially conical shape. In addition, any arrangement may be used, but it is preferable that they are arranged regularly, for example, in a staggered manner.

When the embodiment shown in FIG. 4 and described above is adopted as the uneven sheet 7, the cuts 6 provided on the front and back sheets may be provided at positions avoiding the convex portions p, or the cut portions 6 may be divided. It may be provided at a position where it does.

Further, as another example of the cushioning material 1 of the present invention, although not particularly shown, cylindrical insulators are arranged in a staggered manner between a surface layer portion and a back layer portion composed of two flat sheets. Are provided, and the surface layer portion and the back layer portion are connected by the isolator, a gap is provided between the two layer portions to be superposed, and the surface layer portion and the back layer portion have a gap therebetween. The cut may be formed by alternately providing parallel cuts that reach but do not reach the layer on the opposite side of the gap.

In the present invention, the cuts 6 may be provided in at least one of the surface layer portion and the back layer portion of the cushioning material in parallel with each other without reaching the other layer. It is not necessary to be provided on the front and back layers alternately. Also, the pitch and the interval need not always be constant.

Next, a method of using the cushioning material 1 of the present invention will be described with reference to FIG. For example, when the surface of the buffer material 9 having many irregularities is coated as shown in FIG. 5, the buffer material 1 along the surface A of the buffer material 9 is cut, and the buffer material 1 is cut into the surface B. The buffer material 1 is bent along the surface B by bending inward at the portion, and the buffer material 1 is cut outward at the portion of the cut 6b with respect to the surface C at the back of the concave portion so that the buffer material 1 is along the surface C. The surfaces D, E, F, and G are also bent at the cuts 6c, 6d, 6e, and 6f, respectively, so as to cover the buffered material 9 so that the cushioning material 1 extends along the surfaces.

When a material to be buffered having a shape as shown in FIG. 5 is covered with the buffer material, conventionally, it is necessary to provide separate cushioning materials cut to an appropriate size for each of the surfaces A to G. There was trouble. In order to save this trouble,
When the material to be buffered is surrounded only in the directions along the surfaces E, F, and G, a space is formed in a portion S in the figure, and a foreign substance enters the space and damages the surface of the material to be buffered 9 or the material 1 is not covered with the space. There was a risk of damage at some parts. Also, in order to prevent this problem, filling must be performed, which is troublesome. Furthermore, when the buffered material having the shape shown in the figure is surrounded, it is bulky for a substantial volume, and when it is stored in a narrow space, only a small number of articles (buffered material) can be stored. Moreover, separate cushioning materials were still required for each surface. However, if the cushioning material of the present invention is used, the above-mentioned various problems can be solved.

In order to manufacture the cushioning material of the present invention, for example, using a comb-shaped die, the molten softening resin is continuously extruded through the die, and the surface layer, the back layer, and the isolator are simultaneously formed integrally. An adhesive is applied to one surface of each of the two flat sheets, and the adhesive surface of the two sheets is set to the inside, and the uneven sheet is sandwiched between the two sheets to bond and polymerize. An adhesive is applied to the protruding portion and bonded and polymerized by sandwiching the uneven sheet between two flat sheets, or the above-mentioned three members are thermally laminated with the uneven sheet positioned in the middle, and two flat sheets are formed. An adhesive is applied to one side of each of the sheet-like sheets, and the adhesive is applied to both sides of the above-mentioned sheet, and the adhesive is polymerized, or an adhesive is applied to both end faces of the insulator. Adhesive body is sandwiched between two flat sheets and glued Let, after forming the cushioning material without the cuts using the method of equal, providing a notch at a predetermined position on the surface layer portion of the cushioning material and / or back layer unit.

The above-mentioned cut is usually formed by using a cutting tool after manufacturing.

In the case where the above-described integral molding method is used, the cuts can be formed at the same time during the production.
That is, the die may be extruded using a die having a shape corresponding to a cut.

In the above method, when a thermal laminating method is used to polymerize the flat sheet and the uneven sheet, the lamination is performed immediately after the flat sheet and the uneven sheet are formed by extrusion. Alternatively, the sheet may be extruded into the respective shapes of a flat sheet and a concavo-convex sheet, and the molded articles may be thermally laminated with each other.

When manufacturing a cushioning material in which the surface layer portion and / or the back layer portion of the cushioning material is composed of two layers, and the surface side layer is a foamed resin sheet, the cushioning material having no cut is formed. Thereafter, when a foamed resin sheet is provided on the surface (surface layer portion or back layer portion or both) of the cushioning material, the cushioning material and the foamed resin sheet may be bonded and polymerized by using an adhesive, or may be thermally laminated. May be. Further, when the surface layer and / or the back layer of the cushioning material is a laminated sheet of a flat sheet and a foamed resin sheet, it may be molded using a laminated sheet in which the flat sheet and the foamed resin sheet are laminated in advance. Alternatively, after molding using a flat sheet, a foamed resin sheet may be laminated on the surface of the flat sheet. At the time of lamination, they may be adhered using an adhesive, or may be thermally laminated by heating and melting.

[0035]

[Effects of the Invention] The cushioning material of the present invention is constructed as described above, so that it can be easily bent despite its high rigidity. There is no space between the cushioning material and the cushioning material can be protected sufficiently.
In addition, since it can be easily bent, the rigidity may be sufficiently increased. Therefore, a thin foamed resin sheet having a low expansion ratio and a small thickness can be used, so that the cushioning material does not increase in bulk. This has the effect that the working space is not reduced without increasing the volume of the work and when used for curing.

Further, since there is almost no space between the buffer material and the buffer material, the entire volume of the buffer material covered with the buffer material does not increase, and the movement of the buffer material in a narrow place is prevented. This has the effect that it can be facilitated.

Further, when the cushioning material of the present invention is used for curing, there is no effect that the space for transporting and moving the articles is narrowed, so that the article can be easily moved.

In the above-mentioned cushioning material, when at least one of the surface layer portion and the back layer portion is composed of two layers and the outermost layer is a foamed resin sheet, a greater impact can be absorbed. This has the advantage of having a high buffering effect. In particular, when the material to be buffered is covered with the cushioning material such that the side of the foamed resin sheet is the surface side of the material to be buffered, there is an advantage that there is no possibility that the material to be buffered is damaged by the inner surface of the material.

[Brief description of the drawings]

FIG. 1 is an oblique sectional view showing an example of the cushioning material of the present invention.

FIG. 2 is an oblique sectional view showing another example of the cushioning material of the present invention.

FIG. 3 is a cross-sectional view showing another example of the cushioning material of the present invention.

FIG. 4 is a diagram showing an embodiment of an uneven sheet.

FIG. 5 is a view for explaining a means for coating a material to be buffered using the cushioning material of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Buffer material 2 Surface part 3 Back layer part 4 Isolator 5 Gap 6 Cut 7 Uneven sheet 8 Intermediate layer

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) B32B 1/00-35/00 B65D 65/00-65/40 B65D 85/30-85/48

Claims (2)

(57) [Scope of request for utility model registration] A surface layer, a back layer disposed at a predetermined distance from the surface layer, and an isolated body provided between the two layers by connecting the two layers; A cushioning material in which a gap is formed between both layer portions, and reaches a layer on the side opposite to the surface layer portion and / or the back layer portion of the cushioning material with the gap and / or the insulator therebetween. A cushioning material characterized by being provided with notches parallel to each other. 2. The cushioning material according to claim 1, wherein at least one of the surface layer portion and the back layer portion comprises two layers, and the outermost layer is a foamed resin sheet.