JPH0634094Y2 - Buffer pad - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a flat buffer pad made of polyurethane or polyethylene foam used for packing and storing various articles.

[Prior Art] Conventionally, a cushioning pad used for this type of application has been obtained by simply cutting a plastic foam-molded product into a flat plate shape.

[Problems to be Solved by the Invention] Since the conventional buffer pad of this type is a flat plate body having an appropriate size and a predetermined thickness as described above, it is difficult to bend and it is impossible. When bent to the outside, cracks due to pulling easily occur on the outside of the bent part,
Further, since the inside is expanded and deformed due to compression, the shape does not follow the outer shape of the article, which impairs the function as a cushioning pad that protects the article to be packed or stored from a shock, and is also unfavorable in appearance. There were problems such as.

In view of these problems of the cushioning pad made of a plastic foam plate, the present invention is soft and has a high cushioning property, can be easily bent, and can be shaped according to the outer shape of the article. Even if it is bent, no deformation distortion occurs in the bent part, it not only has an excellent cushioning function to protect the article from impact and appearance, but also retains its shape properly by eliminating the restoring property of the concave groove for reuse or other purposes. An object of the present invention is to provide a cushioning pad having a high cushioning property that conforms to the outer shape of an article even when it is diverted.

[Means for Solving the Problems] The present invention is configured as follows as technical means for achieving the object.

That is, the buffer pad according to the present invention is made of polyurethane,
A flat plate made of polyethylene foam,
It is characterized in that a hot groove is made to contact one surface to form a groove crossing the surface and a hard skin portion is formed on the inner surface of the groove by heat shrinkage of the foam. is there.

[Operation] As described above, the cushioning pad according to the present invention is a flat plate made of polyurethane or polyethylene foam, and even if it is difficult to bend itself, the cushioning pad traverses one side. Since the concave groove is formed, it can be bent easily and without causing deformation strain at the concave groove portion, and can be appropriately formed into a shape according to the outer shape of the article, or can be accurately conformed to the shape. Can be used together.

Moreover, since the cushioning pad according to the present invention has a hard skin portion formed on the inner surface of the groove by heat shrinkage of the foam, a restoration phenomenon such as a groove formed by simply pressurizing the foam is prevented. Even if it is reused or diverted, it can fit the outer shape of the article correctly and has a high cushioning property.Also, even if the groove is repeatedly bent, It does not crack and withstands repeated use.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 is a buffer pad. The buffer pad 1 is in the form of a flat plate made of a soft resin such as polyurethane or polyethylene foam, and has a foaming ratio of 1.
5 to 50 times. A large number of concave grooves 2 are formed on one surface of the cushioning pad 1 in parallel and across the surface. The groove 2 has a rectangular cross section, a U shape, a V shape, etc., in a cross section orthogonal to the forming direction thereof. The depth of the groove 2 and the distance between the groove 2 and the buffer pad 1 are bent even when the buffer pad 1 is bent. It is selected in a suitable state that does not cause deformation distortion, is easy to bend, and does not tear. Inner surface of groove 2
A hard skin is formed on 2a. The hard skin portion 2a allows the concave groove 2 to retain its shape properly without being restored, and can prevent the concave groove 2 from cracking even by repeated bending.

2 and 3 show examples of use of the cushioning pad 1 according to the present invention.

That is, FIG. 2 shows an example of use as the buffer pad 4 provided on the inner wall 3a of the hollow double-walled container 3, and the buffer pad 4 is fixed along the curved shape of the inner wall 3a. Second
The cushioning pad 4 shown in the figure has a plurality of recessed grooves 2 formed in parallel on the side of the contact surface 4a with the article, and absorbs the deformation generated when the groove 2 is curved. The buffer pad 4 shown in FIG. 2 is made by foaming polyethylene 30 times. FIG. 3 shows an example in which the cushioning pad 1 according to the present invention is used as a cover 6 for covering the end surface 5a of the article 5, and a plurality of concave grooves 2 are formed in parallel with the ridge line of the end surface 5a. The cover 6 is made by foaming polyurethane five times.

FIG. 4 shows another example shown in FIG. 1 and FIG. 2, in which the groove 2 that crosses one side of the buffer pad 1 has a short groove 7 that is orthogonal to it. Are formed in large numbers. In the other example, the buffer pad 1 can be deformed to some extent not only in the two-dimensional direction parallel to the concave groove 2 but also in the three-dimensional direction intersecting with the concave groove 2.

5 to 7 illustrate the manufacturing mode of the cushioning pad 1.

That is, 8 is a fixed jig and 9 is a movable jig, and the movable jig 9 is provided with a large number of hot plates 10 for forming the concave grooves 2. Numeral 11 is a polyurethane or polyethylene foam, which has a flat plate-like shape on both sides.

In order to manufacture the foam cushioning pad 1, first, the foam 11 manufactured by extrusion is placed on the fixing jig 8 (the fifth step).
Next, the movable jig 9 is lowered to form the groove 2 with the heating plate 10 (FIG. 6). Then, when the movable jig 9 is raised (FIG. 7), the buffer pad 1 having the concave groove 2 is obtained. At this time, a hard skin portion due to heat shrinkage of the foam is integrally formed on the inner surface of the groove 2.

The cushioning pad 1 configured as described above has a high cushioning property because it has a flat plate shape made of a polyurethane or polyethylene foam which is a soft resin. Since the concave groove 2 is formed on one surface of the concave groove 2 so as to cross the surface, even if the buffer pad 1 is a foam and is difficult to bend itself, the concave groove 2 is not formed. It can be bent easily and without causing distortion. Moreover, since the hard skin portion is integrally formed on the inner surface of the groove 2, the groove 2 can be properly maintained in its shape without being restored, and cracks due to repeated bending can be completely prevented. Therefore, the cushioning pad 1 according to the present invention is not only capable of being properly formed into a shape corresponding to the outer shape of various articles, and not only being able to properly follow the outer shape of the article to obtain a high cushioning property, but also reused or otherwise. Even when it is diverted, high buffering property can be maintained.

[Advantage of the Invention] According to the present invention, in addition to being soft and having a high cushioning property,
It is easy to fold, and even if it is bent along the outer shape of the article, it does not cause deformation distortion in the bent part, not only has a good cushioning function to protect the article from cushioning and excellent appearance, but also the resilience of the concave groove Even if the shape is properly retained and reused or diverted for another purpose, it is possible to obtain a cushioning pad having a high cushioning property along the outer shape of the article.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of a cushioning pad according to the present invention, and FIGS. 2 and 3 are partial perspective views showing a mode of use of the cushioning pad according to the present invention, respectively. FIG. 5 is a perspective view of a plate body showing another embodiment, and FIGS. 5 to 7 are explanatory views of a mode of manufacturing the cushion pad according to the present invention. 1 ... Buffer pad, 2 ... Recessed groove, 7 ... Short recessed groove, 8 ...
… Fixing jig, 9 …… Movable jig, 10 …… Hot plate, 11 …… Polyurethane or polyethylene foam

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Claims (1)

[Scope of utility model registration request] 1. A flat plate made of polyurethane or polyethylene foam, wherein a hot plate is brought into contact with one surface to form a groove crossing the surface and an inner surface of the groove is formed. A cushioning pad characterized in that a hard skin portion is formed by heat-shrinking the foam.