JPH0226867Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The invention is applicable to cubic or rectangular parallelepiped articles,
The present invention relates to corner pads for protecting the corners of a packaged object, such as a speaker box, when the packaged object is transported and stored in a packaging box such as a cardboard box.

Conventional Structure and Problems Conventionally, foamed resin cushioning materials such as foamed polystyrene and foamed polyethylene have been used as corner parts of rectangular parallelepiped-shaped packaged objects such as speaker boxes, as in precision equipment and precision electrical products. However, in recent years, based on the fact that speaker boxes etc. have strong mechanical properties such as drop strength and compressive strength compared to relatively precision equipment and precision electrical products,
Reducing the volume of the outer packaging box (reducing transportation and storage costs)
Therefore, a method has come to be adopted in which packaging is performed simply by applying corner pads of polyethylene molded products to the corners of the packaged object, that is, by eliminating the foam resin cushioning material.

The conventional corner pad as described above will be explained below with reference to the drawings and FIGS. 1 to 4.

As shown in the figure, the conventional corner pad 1 includes a polyethylene bottom plate 2a formed in a substantially box shape, and a corner support recess connected to two sides of the bottom plate 2a to form a double wall and formed with the bottom plate 2a. The box-shaped bottom plate 2a is provided with a lattice-shaped bottom rib 4 inside, and the two side plates 2b and 2c are provided with side ribs 5. It was hot. Then, as shown in FIG. 3, the packaged object 6 was placed in a packaging box (not shown) made of cardboard or the like with its corners pressed against it.

The corner pad 1 having the above structure has a certain degree of cushioning properties due to the bottom rib 4 and the side ribs 5, but the fourth
As is clear from the curves in the figure, the side plates 2b, 2c
The bottom rib 4 of the bottom plate 2a is
The strength b decreases as the strain increases. In other words, when a large external force such as a fall impact occurs,
The bottom rib 4 does not have adequate strength. In other words,
Conventional corner pads have different cushioning properties against a falling impact in the side direction and cushioning properties against a falling impact in the bottom direction, which has an adverse effect on the packaged object 6. Furthermore, in order to eliminate the above-mentioned drawbacks, a piece of cardboard or the like is sometimes placed between the packaged object 6 and the conventional corner pad 1 in order to improve the cushioning properties in the bottom direction.

As described above, in the conventional corner pad 1 made of a polyethylene molded product, the bottom plate 2a and the side plates 2b and 2c have different cushioning properties, and corrugated cardboard or the like must be used. Furthermore, due to the slippery nature of polyethylene molded products, the corner pads 1 may fall from the packaged object 6 during packaging operations, making the operation difficult. Furthermore, since it is weak against impact force, it has drawbacks such as cracking when dropped from a corner and poor restorability.

Purpose of the invention The present invention takes into account the above-mentioned conventional problems, has the same cushioning properties in the bottom plate and side plates, does not crack even when dropped at a corner, does not fall during packaging work, and has compatible recovery properties. The purpose of this is to provide a corner pat with a

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a corner part having a bottom plate and two side plates that are connected to two sides of the bottom plate and form a corner receiving recess with the bottom plate, and these are made of an elastic material such as rubber. At the same time, a bottom rib is formed on the outer surface of the bottom plate, and the side plate is formed into a trapezoid shape with a tapered side on the free end side, and has a plurality of vertically protruding side ribs on the outer surface. This side rib is formed except for the top part formed by the bottom plate of the side plate, and this structure improves the cushioning properties of the bottom part and the side part against the falling impact of the packaged object, and also This also facilitates the installation work.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 5 to 8.

In the figure, 7 is a bottom plate, and 8 and 9 are side plates that are connected to two sides of the bottom plate 7 and form a corner receiving recess 14 with the bottom plate 7, and these are formed by injection molding of rubber.

The bottom plate 7 has a lattice-like bottom rib 10 on its outer surface, and the side plates 8 and 9 are formed into a trapezoidal shape with tapered sides on the free end side. Plural vertically protruding side ribs 1, leaving some nearby
1. The corner pad 12 having the above structure is placed in the packaging box in a state where it is in contact with the corner of the object to be packaged 13. This corner pad 12 takes advantage of the properties of rubber, and by providing side ribs 11 and bottom ribs 10, side plates 8 and 9 are formed as shown in FIG.
The compression characteristic C of the bottom plate 7 and the compression characteristic d of the bottom plate 7 are almost the same, which means that the same cushioning properties can be obtained. Also, this corner patch 1
2 has rubber as its main component, so it has toughness and, together with the shock absorbing properties of the top part 15, it can protect the corners of the packaged object 13 well in the event of a corner fall.

Note that in this example, the bottom ribs were shaped like a lattice, but
Various shapes are possible depending on the weight of the packaged object. Furthermore, the side ribs do not necessarily have to be of the same height, and by arranging two or more types of ribs with different heights, it is also possible to perform stepwise buffering. Further, although this corner part is molded from rubber, it may also be made from a soft synthetic resin having elasticity.

Effects of the invention As described above, according to the corner points of the invention,
By using an elastic material such as rubber, and providing a bottom rib and a side rib on the bottom plate and the side plate, respectively, and forming the side rib except for the area near the top formed by the bottom plate of the side plate, the top part can be strengthened. Moreover, the same degree of cushioning performance can be obtained against drops in each direction.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional corner pad, Figure 2 is a bottom view of the same corner pad, Figure 3 is a perspective view of the same corner pad in use, and Figure 4 is the relationship between static stress and static strain of a conventional corner pad. FIG. 5 is a perspective view of a corner pad according to an embodiment of the present invention, FIG. 6 is a bottom view of the same corner pad, and FIG.
The figure is a perspective view of the corner pad in use, and FIG. 8 is a graph showing the relationship between static stress and static strain of the corner pad. 7... Bottom plate, 8, 9... Side plate, 10... Bottom rib, 11... Side rib, 12... Corner pat, 1
4... Corner receiver recess.

Claims (1)

[Scope of utility model registration request] It consists of a bottom plate and two side plates that are connected to two sides of the bottom plate and form a corner receiving recess with the bottom plate, the bottom plate has a bottom rib on the outer surface, and the side plate has a tapered side on the free end side. It has a trapezoidal shape, and has a plurality of vertically protruding side ribs on the outer surface, and these side ribs are formed except for the area near the top formed by the bottom plate of the side plate, and these side ribs are made of an elastic material such as rubber. Molded corner parts.