JPH03176379A - Cushioning material - Google Patents

Abstract

PURPOSE:To prevent local impact concentrations on the corners of a packaged object when it is dropped by providing cushioning materials with specific grooves made at the corners formed by areas forming a right angle and inner end faces. CONSTITUTION:Each of a pair of divided lower cushioning materials 1 and 2 is provided with two cushioning grooves 6, 7 and 8, 9, respectively. The groove 6 is provided consisting of inner areas forming a right angle (the surface formed by an inner side surface 3 of a cushioning material 1 and an inner bottom surface 4 thereof) to receive one of the corners of an object P to be packaged and a vertical corner part formed by the joining of one of inner end faces 5 with one end of the areas forming a right angle perpendicular thereto. In the event that a package containing the object P should be dropped in transit here is no local load concentration of the corners of the object P on the corner parts formed by the right angle areas and the inner end faces of the cushioning materials 1 and 2 due to the formation of grooves 6, 7, 8 and 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field This invention relates to a cushioning material, and more specifically, the present invention relates to a cushioning material, and more specifically, a two-part or four-part cushioning material made of foam plastic for packaging containers and image forming apparatuses such as copying machines and facsimile machines. Regarding materials.

(b) Conventional technology Conventional two-part cushioning material 5I, 52, 5 as shown in Fig. 8
3.54 has a rectangular parallelepiped surface (concave surface) that comes into contact with the packaged object P, and has one right-angled inner surface that comes into contact with one side of the packaged object P, and a right-angled inner surface that is perpendicular to the right-angled inner surface at both ends of this right-angled inner surface. and two inner end surfaces. The right-angled inner surface and inner end surface protect the packaged item P by stopping and softening vibrations and shocks that the packaged item P receives during transportation.

(c) Problems to be solved by the invention However, this type of buffer u51, 52, 53, 54
For packaging materials that employ this method, accidental dropping accidents that occur during transportation usually occur when the packaging materials are tilted. Therefore, the load due to the vibration f+impact will cause cracks to radiate from the adjacent portions of the two surfaces, since the edges of the packaged object P are adjacent to the right-angled inner surfaces of the cushioning materials 51, 52, 53, and 54, that is, perpendicularly. This is easy to occur, and once cracks occur, the next time vibration or shock is applied, the cushioning material 51, 52,
The function as 53 and 54 will be significantly reduced.

One way to solve this problem is to reduce the number of corners of the cushioning material that come into contact with some of the corners of the packaging container or box.
It is practiced to cut out a part of the contact surface with which the packaged object comes into contact.

However, when such a cushioning material is used, there is a risk that the cushioning material may separate from the corners or the corners of the packaging container or box may be deformed due to the impact of a fall.

In general, molds for molding cushioning materials usually have a length of 30 to 50 m.
A pusher bottle with a diameter of m is used. and,
From the viewpoint of mold releasability, it is desirable to arrange the extrusion bottles at the four corners of the molded product, ie, the a-bump. However, when molding a cushioning material whose corners are cut out as described above, the extrusion bottle is used as a molded product (buffer I
It could not be placed at the corner of t), and the female type was poor.

This invention was made in view of the above-mentioned circumstances, and can prevent the fear that the cushioning material will separate from the corners or the corners of the packaging container or box will be deformed due to the impact of dropping, etc. The purpose of the present invention is to provide a cushioning material that is also advantageous in terms of mold releasability during molding.

(d) Means for Solving the Problems and Their Effects This invention provides a method for storing approximately rectangular objects to be packaged in a packaging container or box.
A cushioning material made of foamed plastic that is interposed between the two when the product is packaged, and has one right-angled inner surface that abuts one ridge of the packaged object, and at least ! and a ridge formed by the right-angled inner surface and the inner end surface, from the inside to the outside along the ridge, and from the open end of the ridge beyond the closed end. This is a cushioning material that has a cushioning groove formed by cutting out the edge of the cushioning material.

That is, the present invention is characterized in that a specific buffer groove is formed in the ridge portion formed by the right-angled inner surface and the inner end surface.

The concave groove prevents the ridge formed by the right-angled inner surface and the inner end surface from being intensively subjected to force due to the impact of a fall. In addition, if a force is applied to the edge of the cushioning material by an object to be packaged, the corner may deform due to the thin wall thickness of the corner.
Therefore, separation of the buffer material is prevented.

(e) Examples The present invention will be described in detail below based on embodiments shown in the figures.

Note that this invention is not limited to this.

The packaging member consists of a cardboard box and two pairs of foamed polystyrene cushioning materials, one on each of the upper and lower sides, which are interposed between the box and the approximately rectangular object to be packaged (for example, a copying machine). Become the lord.

As shown in FIGS. 1 to 5, two buffer grooves 6, 7, 8, and 9 are formed in each of the lower two-part cushioning material l and 2. .

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- one right-angled inner surface that contacts the vehicle (in Figure 1, cushioning material 1
(formed by the inner surface 3 and inner bottom surface 4), and E inner end surfaces 5 perpendicular to the right-angled inner surface at one end of the right-angled inner surface.

This concave groove 6 is formed on the inside (inside surface 3
and the inner end surface 5 side) to the outside (III (outer surface and inner surface), and from one open end (upper end) of the ridge to a point beyond the closed end (lower end). It is formed by

Note that the other grooves 7, 8, and 9 have the same configuration as this groove 6.

The planar shape of the groove 7 is a square with four rounded corners, as shown in FIG. Further, the bottom of HN3 is located below the inner bottom surface 4 of the '117# material 1, as shown in FIG.

In this way, even if the packaging member containing the packaged item P is tilted and falls during transportation, the load from the corners of the packaged item P is balanced by the grooves 6, 7, 8, and 9. 7,1)・Q,
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・11; Do not concentrate on the 41111 part. In addition, if a force is applied to the edges of the cushioning materials 1 and 2 by the object to be packaged P, the corners will be deformed by the force because the wall thickness of the corners is small, and therefore the cushioning Prevents separation of materials 1 and 2.

Further, since the bottom surface of the cushioning material 1/2 is not cut out, it is possible to provide an extrusion pin with a diameter of 30 to 50 mm in the molding die at an optimal position from the standpoint of mold releasability.

Furthermore, since the outer surface of the cushioning material 1/2 is not cut out, deformation of the packaging container such as a cardboard case can be minimized, and the compression resistance when the packaging containers are stacked is also improved.

Here, for reference, an example of the dimensional specifications of vI impact is given using FIGS. 4 and 5.

The width of the groove 9, the thickness T of the peripheral wall of the shock absorber 2, and the shock absorber 2
Corner wall thickness A≧lO~15mm.

Thickness B from the bottom surface of the groove 9 of the buffer material 2 to the bottom surface of the buffer l1t2 is 15 mm or more.

The wall thickness C of the bottom wall portion of the cushioning material 2 is 30 to 60 mm (varies depending on the weight of the packaged object P, the properties of the cushioning material, etc.), and the radius of curvature Ra of the groove 9 is 5 to 10 mm.

The radius of curvature Rb of the groove 2 is 10 mm or more. Note that, unlike the above embodiment, as shown in FIGS.
Depending on the thickness of the wall, etc., it is formed into a rectangular or circular shape.

(f) Effects of the invention According to the cushioning cage of this invention, the impact of falling, etc.
This can prevent the shock absorbing material from separating from the corners or the corners of the packaging container or box from deforming. Furthermore,
It also has f11 in terms of mold releasability when molded using a mold.

[Brief explanation of drawings]

1 to 7 show embodiments of this invention. That is,
Figure 1 is a perspective view of the cushioning material, Figure 2 is an enlarged plan view of the main parts of the cushioning material, Figure 3 is a sectional view taken along line III-III in Figure 2, and Figure 4 is an enlarged view of the main parts of the cushioning material. 5 is a sectional view taken along the line v-■ in FIG. 4, FIG. 6 is an enlarged plan view of the main part of the cushioning material, and FIG. 7 is an enlarged plan view of the main part of the first shock absorbing material. FIG. 8 is a perspective view showing a state in which a conventional cushioning material is attached to an object to be packaged. !・2・12・22・・Buffer cage, 6・7・8・9・・Buffer groove, P・・Packaged item. Fig. 7 Fig.--Exampleゝ) (D Compiled Fig.

Claims (1)

[Scope of Claims] 1. A cushioning material made of foamed plastic that is interposed between a substantially rectangular parallelepiped object when the object is stored in a packaging container or a box, the cushioning material being a cushioning material that corresponds to one edge of the object. one right-angled inner surface that contacts, and at least one inner end surface that is perpendicular to the right-angled inner surface at an end of the right-angled inner surface, and further includes a ridge formed by the right-angled inner surface and the inner end surface; A cushioning material having a buffer groove formed by cutting out the edge from the inside to the outside along the edge from the open end of the edge to the point beyond the closed end.