JPS5855183Y2 - shock absorber - Google Patents

Description

[Detailed description of the invention] The present invention relates to a shock absorbing device for cushioning articles inside a packaging box, and in particular can reduce the amount of cushioning material used and is more suitable for heavy articles. This relates to a shock absorbing device.

BACKGROUND ART Conventionally, it has been widely practiced to apply cardboard or the like to the corners of an article to prevent the article stored inside a packaging box from being damaged during transportation or the like.

However, in recent years, in order to further increase the cushioning effect, layers of cardboard are used, or members commonly called Pillow Pack (registered trademark) are stacked in multiple layers in a cross-like arrangement. The formed pyroform (registered trademark) is also used.

Figures 1 and 2 are examples. That is, the first
As shown in the figure, a laminated cushioning material 2 is constructed by stacking flat cardboard 1 having a corrugated core material in multiple layers, and this is applied to the corner or side of an article, or as shown in FIG. A flat plate-shaped Pyroform (registered trademark) 3 made of wavy core materials laminated in multiple stages in a cross shape as shown in FIG. 1 is formed into a shape similar to that shown in FIG. I'm trying to hit the mark.

By the way, in such a laminated cushioning material, the cardboard 1 shown in FIG. 1 above is taken as an example.
Looking at the impact absorption effect per volume from each of the three compression directions, the y direction (corrugated cardboard wave direction) is 9.0 kg-cm
/cm2, X direction (cardboard grain direction) is 3.0kg-
cm/cm2, whereas in two directions (thickness direction of the cardboard), the impact absorption effect is only 0.6 kg-cm/cm2.

Therefore, the x-y direction (corrugated cardboard wave/grain direction)
Because it has a high impact absorption effect as a cushioning material, it can be made relatively thin or does not require much area. However, since the impact absorption effect is low in two directions (thickness direction of the cardboard), To ensure the same impact absorption effect, the cardboard needs to be laminated thicker or have a larger area.

These points are important to keep in mind when using laminated cushioning materials.

Also, depending on the size and weight of the items to be stored in the packaging box, these may become a constraint and the use of laminated cushioning material may be postponed and other cushioning materials may be used. there were.

That is, when the article A indicated by the chain line as shown in FIG. 1 is placed on top of the laminated cushioning material 2,
If the item A is relatively light, the cardboard 1 will be left in the direction perpendicular to the flat surface on which the item A is placed, but if the item A is removed from the cardboard 1, Restore to original state.

However, if the article A is relatively heavy when placed on the flat part of the laminated cushioning material 2,
Due to the load of the article A, the cardboard 1 gradually deforms due to the load in the direction perpendicular to the surface on which the article A is placed.

In particular, as described above, the crushing strength in the thickness direction (two directions) of the laminate is weaker than in the other X and y directions, so the degree of deformation is significant.

As a result, the cardboard may become flattened and no longer have any impact absorption effect, or a gap may be created between the cushioning material and the article, causing the article to wobble.

Furthermore, once the cardboard is compressed and deformed into a flat shape in this way, it does not return to its original state even after the item is removed, making it impossible to reuse it as a cushioning material.

From this point of view, in order to expand the use of these laminated cushioning materials, it is first required to minimize the differences in properties (crumple strength) of corrugated cardboard in the grain and wave directions and in the thickness direction.

In particular, there is a strong demand for strengthening the crushing strength of corrugated cardboard in the thickness direction and reducing the difference between the crushing strength of other corrugated cardboards in the grain and wave directions.

The present invention was developed in view of such demands with the aim of improving the properties of the corrugated board in the thickness direction (two directions).

In response to these demands, the present invention solves the above-mentioned problems by applying a reinforcing agent to the vertical surface of the mounting section that constitutes the laminated cushioning material, which tends to become flat due to the load of the article. has been resolved.

As reinforcing agents used in the present invention, in addition to commonly sold glues and paraffin, hot-melt adhesives that can be bonded in a short time are used.

If the latter hot-melt adhesive is used, the shock absorber of the present invention can be completed in a short period of time, and the labor required for this work has a significant impact on costs. I have less.

An embodiment of the present invention will be described below based on the drawings.

FIG. 3 shows a preferred embodiment of the shock absorber according to the present invention, and FIG. 4 shows an enlarged view of the main parts thereof.

As shown in these figures, the laminate 4 constituting the main body of the shock absorber of the present invention is constructed by stacking a large number of corrugated cardboards 5 having a corrugated core material in the thickness direction.

That is, this laminate 4 has a mounting portion 6, which is a planar portion on which an article is placed, and is formed by stacking a large number of cardboard boxes 5.
and a U-shaped positioning section 7 formed slightly higher than the surface of the mounting section 6 so as to surround the mounting section 6.

A total of four laminates 4 configured in this manner are arranged so as to face each other on both upper and lower sides of the inside of the packaging box, and are applied to the corners and sides of the articles to be stored. There is.

Thickness direction (two directions) of the laminate 4 corresponding to the above mounting portion 6
The vertical surface of the laminate 4 faces, and the cardboard 5 is placed on this surface.
The continuous eyes, or wavy core, are exposed as a cross section.

This vertical surface 8 is provided with notches 9, 9, which are cut out in an arc shape and extend in the thickness direction of the laminate 4.

Then, a vertical surface 8 of a portion of the stacked body 4 corresponding to the mounting portion 6 is provided.
A reinforcing agent 10 such as a commonly used glue, paraffin, or hot melt adhesive is adhered to the entire surface of the holder.

Here, hot melt adhesive is used as the reinforcing agent 10 because it can achieve adhesion in a short period of time and can therefore be used immediately as a corner cushion material, but it is also possible to achieve adhesion in an even shorter time. An emulsion adhesive (for example, polyacrylate, polyvinyl acetate, etc.) may be used.

By applying this reinforcing agent 10 to the vertical surface 8, the end face facing the cut wavy core material of the laminated corrugated cardboard 5 is reinforced, and the core material can be easily crushed even when heavy articles are placed on it. It is designed so that it will not happen.

Next, an example of a method for applying a reinforcing agent to the laminated cushioning material will be described.

The reinforcing agent 10 may be applied directly to the vertical surface 8 of the mounting portion 6 constituting the laminated cushioning material 4 using a brush, but in the present invention, the process is mechanically applied. For this purpose, for example, a device as shown in FIG. 6 is used.

Using this device, the reinforcing material inside the casing 13 is heated and melted by the heater 12 by simply touching the vertical surface 8 of the laminated cushioning material 4, which is held on both sides and transported by a conveyor, etc., against the surface of the rotating roller 11. 10 is carried upward as the roller 11 rotates and is applied to the vertical surface 8 of the laminated cushioning material 4, so the application process is extremely quick and efficient.

Therefore, this work has very little impact on the cost of the shock absorber as a product.

Therefore, the shock absorber can be manufactured at low cost.

Note that this example shows an example in which the reinforcing agent was applied not to all of the cut vertical surfaces of the laminate, but only to a portion (the central portion).

This is because vertical surfaces are most rationally reinforced with a small amount of reinforcing agent, and also because it is most suitable for mechanical processing as described above.

Therefore, the placing portion 6 has a notch 9 as shown in FIG.
9 may be omitted and the reinforcing agent may be applied to the entire cut vertical surface.

Next, FIG. 7 shows the main parts of a shock absorber that is adapted to adjust the stiffness.

The vertical surface 8 corresponding to the mounting portion 6 constituting the cushioning material 4 has a large number of (three in the illustrated example) grooves 14, 14° 14 in the thickness direction of the laminate 4 (the direction in which the cardboard boxes 5 are stacked). forming and on said vertical surface 8 the above-described device (see FIG. 6).
A reinforcing agent 10 is applied using a method such as that shown in FIG.

With this configuration, the amount of reinforcing agent 10 applied to the vertical surface 8 of this embodiment is smaller than that of the vertical surface 8 shown in the above-mentioned embodiment (see FIG. 3). 14, the stiffness of the vertical surface 8 can be reduced accordingly.

Note that the number of the above-mentioned grooves can be increased as necessary, and in this way, the stiffness of the vertical surface can be adjusted according to the weight of the article, etc.

In addition, although the above-mentioned embodiments were explained using cardboard as the paper material sheet, Pyrofoam (registered trademark)
It can also be applied to those using as a cushioning material.

In this case, as shown in Fig. 2, the surface that is visibly exposed is parallel to the flat direction Z and has two cut surfaces in the direction perpendicular to the X and Y directions, and either of these surfaces is coated with the reinforcing agent. You may wear it.

As is clear from the above explanation, according to the present invention, the strength in the vertical plane thickness direction, which was a weak point of laminated cushioning materials, has been improved, and as a result, it can be easily adapted to heavier items. Not only can its uses be expanded, but it also eliminates the need to pile up more cardboard boxes to increase strength in the thickness direction, making it possible to reduce the amount of material used.

Further, according to the present invention, since the vertical surface does not become flat due to the load of the article, it can be reused as a cushioning material.

Further, according to the present invention, since the work for applying the reinforcing agent on vertical surfaces is extremely simple, there are various effects in that the influence on cost is extremely small.

[Brief explanation of the drawing]

1 and 2 show a conventional laminated cushioning material, FIG. 1 is a perspective view showing a laminated cushioning material using cardboard, and FIG. 2 is a perspective view showing Pyrofoam (registered trademark). Figure 3 and subsequent figures show one embodiment of the shock absorber of the present invention.
The figure is a perspective view showing a shock absorber using cardboard, FIG. 4 is an enlarged perspective view showing the main parts of the shock absorber, FIG. FIG. 7 is a schematic vertical sectional view showing an example of a method of applying a reinforcing agent, and FIG. 7 is an enlarged perspective view of main parts showing another embodiment of the present invention. 5...Cardboard, 8...Vertical part, 10
...Reinforcement agent.

Claims (1)

[Scope of utility model registration request] In a buffer device configured by laminating a plurality of paper sheets having a corrugated core material, and placed in a packaging box to cushion an article stored in the packaging box, the laminate of the paper sheets described above is provided. The planar part of the laminate is used as a placing part for the article, and a hot melt adhesive or the like is applied to a part or all of the vertical surface of the placing part of the laminate where the end surface of the wavy core material is exposed. A shock absorbing device characterized by having a reinforcing material applied by means such as coating.