JP7265707B2 - Glass plate package - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass plate package constructed by stacking a glass plate laminate, which is obtained by laminating a glass plate and a protective sheet, on a pallet.

As is well known, in recent years, various glass plates typified by glass substrates for flat panel displays (FPDs) such as liquid crystal displays have been promoted to be larger in size. As an example, in glass substrates for liquid crystal displays, those having a side length exceeding 2000 mm are the mainstream. Since a large glass plate is easily damaged, it is extremely difficult to handle when packed and transported, and the form of packing is particularly important.

As a packing form of the glass sheets, a form in which the laminated body of glass sheets is placed on a pallet in a flat position (substantially horizontal position) and packed in this state is well known. By placing the glass plate laminate in a flat position, the plurality of glass plates are supported by surface contact, so stress concentration in the glass plates during transportation can be prevented, and breakage of the glass plates can be suppressed.

By the way, the transportation means of the glass sheet package include air transportation, marine transportation, truck transportation, and cargo handling by forklifts. Vibrations or shocks in the direction and in the left and right direction act continuously. For this reason, the glass plate package requires a structure that absorbs (buffers) vibrations and shocks and prevents the glass plate laminate from being dislocated.

Regarding this point, in Patent Document 1, a glass plate receiving portion is arranged on a pallet, a buffer is arranged on the upper surface of the glass plate receiving portion, and a plurality of stoppers ( A glass plate package is disclosed in which a glass plate laminate is supported by a pressing plate.

In this glass plate package, vibrations and impacts during transportation can be reduced by supporting the glass plate laminate with the buffers arranged on the stopper receiving portions. In addition, by locking the side portions of the glass plate laminate with a plurality of stoppers, it is possible to prevent lateral displacement of the glass plate laminate during transportation.

JP 2010-168072 A

When a glass plate laminate is transported by a conventional glass plate package, the stopper may be deformed by pressing of the glass plate laminate. In this case, since the stopper is deformed so as to be inclined, the amount of deformation of the upper portion of the stopper is larger than the amount of deformation of the lower portion of the stopper. Along with the deformation of the stopper, positional deviation may occur in a part (upper) glass plate of the glass plate laminate. Moreover, there is a possibility that the stopper may come into contact with the side wall portion of the container housing the glass plate packages, the glass plate packages arranged side by side, members arranged in the periphery, and the like.

When the stopper is in contact with the side wall or the like of the container, it becomes difficult to carry out the glass sheet package from the container. In addition, when the stopper is deformed, it becomes difficult to carry the glass sheet package into the container. In particular, when transporting large-sized glass sheets, the above-mentioned problem becomes conspicuous because the gap between the side wall portion of the container and the glass sheet package is small.

The present invention has been made in view of the above circumstances, and a technical object of the present invention is to prevent deformation of a stopper due to positional displacement of a glass plate laminate.

The present invention is intended to solve the above problems, and includes a glass plate laminate in which a glass plate and a protective sheet are laminated, a pallet on which the glass plate laminate is loaded, and a side of the glass plate laminate. and a buffer member interposed between the glass plate laminate and the stopper, wherein the buffer member contacts a side portion of the glass plate laminate. It is characterized by comprising a first hard layer and a soft layer arranged between the first hard layer and the stopper.

According to such a configuration, when the glass plate laminate is displaced in the lateral direction during transportation of the glass plate package, the soft layer shrinks to prevent deformation of the stopper. In addition, by disposing the first hard layer between the soft layer and the glass plate laminate, the soft layer can be prevented from coming into contact with the glass plate laminate. Thereby, abrasion of the soft layer can be prevented, and durability of the glass plate package can be improved.

The cushioning member may comprise a second hard layer arranged between the soft layer and the stopper. As a result, the soft layer is prevented from contacting the stopper, and wear of the soft layer can be prevented.

The first hard layer may be made of a resin having a 25% compressive stress of 200 kPa or more and closed cells. Thereby, the hardness of the first hard layer in contact with the glass plate laminate can be optimized, and the durability can be further improved.

The soft layer may be made of a resin having a 25% compressive stress of 50 kPa or less and having closed cells. Thereby, the soft layer can contract so as not to deform the stopper when the glass plate laminate is displaced in the lateral direction.

The glass plate laminate may be loaded on the pallet in a flat position. Here, when the stopper is deformed in the glass plate package in the flat position, positional displacement occurs in a part (upper) glass plate of the glass plate laminate. In this case, when the unpacking device takes out the glass plates in order, it is necessary to correct the positional deviation of each glass plate. As a result, the product value is lowered and the product cannot be shipped. On the other hand, in the glass plate package, the positional deviation of the glass plate laminate is not the positional deviation (partial positional deviation) of only a part (upper) glass plate, but the entire glass plate laminate. misalignment. For this reason, it is sufficient to correct the positional deviation for the entire glass plate laminate only once, making it unnecessary to correct the positional deviation for each glass plate, thereby suppressing a decrease in commercial value.

ADVANTAGE OF THE INVENTION According to this invention, the deformation|transformation of a stopper by a position shift of a glass plate laminated body can be prevented.

It is a perspective view of the glass plate package which concerns on this invention. It is a sectional view of a glass plate package. It is a sectional view of a glass plate package. It is a side view of a stopper and a buffer member.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated, referring drawings. 1 to 4 show an embodiment of the glass plate package according to the present invention.

As shown in FIGS. 1 and 2, the glass plate package 1 includes a glass plate laminate 2 and a pallet 3 on which the glass plate laminate 2 is loaded.

The glass plate laminate 2 is loaded on a pallet 3 in a substantially horizontal laying attitude. In this embodiment, the “flat position” means that the glass plate laminate 2 loaded on the pallet 3 is arranged at an angle of 0° to 17° with respect to the horizontal direction.

The glass plate laminate 2 is configured by alternately laminating a plurality of glass plates 4 and protective sheets 5 . Although the size of the glass plate 4 is not particularly limited, the case where the glass plate 4 of G8.6 is loaded on the pallet 3 is exemplified in this embodiment. The dimensions of the glass plate 4 in this case are, for example, 2250×2300 mm. The protective sheet 5 is a rectangular sheet having an area larger than that of the glass plate 4 . The protective sheet 5 is made of paper, resin sheet, or the like, for example.

The pallet 3 includes a base portion 6 and a glass receiving portion 7 arranged on the upper portion of the base portion 6 .

The base portion 6 is a member having a rectangular shape in a plan view and made of metal such as aluminum alloy or stainless steel. Each corner of the base portion 6 is provided with a pillar 8 for supporting the upper glass plate package 1 when the glass plate packages 1 are stacked in a plurality of tiers. A side portion of the base portion 6 is formed with an opening portion 9 through which a fork of a forklift is inserted.

The width dimension (inner dimension) of the container (dry container) in which the glass plate package 1 is accommodated is 2352 mm. The pallet 3 has one side dimension corresponding to the width direction of the container smaller than the width dimension.

The glass receiving portion 7 is a rectangular portion made of metal such as aluminum alloy. The glass receiving portion 7 is set smaller than the base portion 6 in vertical, horizontal and height dimensions. The glass receiving portion 7 is mounted on the upper surface portion of the base portion 6 in a state where movement in the horizontal direction is restricted and movement in the vertical direction is permitted. A cushioning body 11 that supports the lower surface of the glass plate laminate 2 is placed on the upper surface of the glass receiving portion 7 .

A stopper 12 is provided on a side portion of the glass receiving portion 7 to restrict lateral movement of the glass plate laminate 2 . A cushioning member 13 is provided between the stopper 12 and the glass plate laminate 2 . Two stoppers 12 and two cushioning members 13 are arranged for each side of the glass plate laminate 2 which is rectangular in plan view, but the number thereof is not limited to that of the present embodiment.

The stopper 12 is made of, for example, a metal plate. The stopper 12 includes a base portion 14 , a support portion 15 that supports the cushioning member 13 , and a connecting portion 16 that connects the base portion 14 and the support portion 15 .

The base portion 14 is fixed to the side portion of the glass receiving portion 7 via a fixing member 17 such as a bolt. The support portion 15 has a support surface 15 a that contacts the cushioning member 13 . The connection portion 16 is in a state in which the support portion 15 is separated from the base portion 6 in the thickness direction so that a space for disposing the cushioning member 13 is formed between the support portion 15 and the glass plate laminate 2. connects the two.

A gap S1 is formed between the support portion 15 and the side wall portion 10 of the container when the glass plate package 1 is accommodated in the container (see FIG. 2). The dimension of the gap S1 varies depending on the dimension of the glass plate 4, but may be 10 to 50 mm or 10 to 30 mm.

The cushioning member 13 includes a first hard layer 18 , a second hard layer 19 and a soft layer 20 . The layers 18 to 20 are integrally adhered by, for example, an adhesive, but the present invention is not limited to this, and the layers 18 to 20 may be brought into contact with each other without being adhered (integrated).

As shown in FIG. 2 , the first hard layer 18 faces the side of the glass plate laminate 2 . A second hard layer 19 is arranged between the soft layer 20 and the support portion 15 of the stopper 12 . The second hard layer 19 is fixed to the supporting surface 15a of the supporting portion 15 by, for example, double-sided tape or the like. As a result, the cushioning member 13 can be more firmly fixed to the support surface 15a than when the soft layer 20 is fixed to the support surface 15a. Not limited to this configuration, the second hard layer 19 may be in contact with the support surface 15a without being fixed thereto.

The 25% compressive stress of the first hard layer 18 and the second hard layer 19 is preferably 200 kPa or more and 300 kPa or less, more preferably 250 kPa or more. The first hard layer 18 and the second hard layer 19 are made of resin having closed cells, such as polyolefin foam, but are not limited to this configuration. The first hard layer 18 and the second hard layer 19 may be made of different resins.

The soft layer 20 is arranged between the first hard layer 18 and the support portion 15 (second hard layer 19 ) of the stopper 12 . The 25% compressive stress of the soft layer 20 is preferably 10 kPa or more and 50 kPa or less, more preferably 30 kPa or less. The soft layer 20 is composed of resin having closed cells, such as polyolefin foam, but is not limited to this configuration.

The thickness dimension of the cushioning member 13 is preferably 12 to 17 mm. The thickness dimension of the first hard layer 18 and the second hard layer 19 is preferably set smaller than the thickness dimension of the soft layer 20 . The thickness dimension of the first hard layer 18 is preferably 2 to 6 mm. The thickness dimension of the second hard layer 19 is preferably 2 to 6 mm. The thickness dimension of the soft layer 20 is preferably 5 to 12 mm.

3 and 4 show the state of the glass plate package 1 when the glass plate laminate 2 is displaced. In FIGS. 3 and 4, the direction of displacement of the glass plate laminate 2 is indicated by X. As shown in FIG.

When the glass plate laminate 2 moves laterally, the buffer member 13 located at the movement destination is pressed by the side portion of the glass plate laminate 2 . In this case, the pressing force of the glass plate laminate 2 acts on the soft layer 20 through the first hard layer 18 . The soft layer 20 contracts due to this pressing force.

Since the soft layer 20 shrinks according to the moving distance of the glass plate laminate 2 , no load that can deform the support portion 15 acts on the stopper 12 . Therefore, even if the glass plate laminate 2 is displaced, deformation of the supporting portion 15 is prevented. Therefore, the gap S1 between the support portion 15 of the stopper 12 and the side wall portion 10 of the container is maintained constant without decreasing. This can reliably prevent the support portion 15 of the stopper 12 from coming into contact with the side wall portion 10 of the container when the glass plate package 1 is accommodated in the container.

The soft layer 20 of the cushioning member 13 , which has contracted due to the pressing of the glass plate laminate 2 , restores to its original state when the glass plate laminate 2 (glass plate 4 ) is removed from the pallet 3 . Therefore, the cushioning member 13 can be used repeatedly together with the stopper 12 .

In addition, the present invention is not limited to the configuration of the above-described embodiment, nor is it limited to the above-described effects. Various modifications can be made to the present invention without departing from the gist of the present invention.

In the above embodiment, the cushioning member 13 has a three-layer structure of the first hard layer 18, the second hard layer 19 and the soft layer 20, but the present invention is not limited to this structure. The cushioning member 13 may be composed of two layers, for example, the first hard layer 18 and the soft layer 20 .

In the above-described embodiment, the glass plate package 1 formed by stacking the glass plate laminate 2 on the pallet 3 in a flat position was exemplified, but the present invention is not limited to this configuration. The present invention can also be applied to a glass plate package 1 in which glass plate laminates 2 are stacked vertically on a pallet 3 .

Although the above embodiment exemplifies the cushioning member 13 in which the single soft layer 20 is arranged between the first hard layer 18 and the second hard layer 19, the present invention is not limited to this configuration. The soft layer 20 may be composed of multiple layers, and additional hard layers may be arranged between the multiple soft layers.

1 glass plate package 2 glass plate laminate 3 pallet 4 glass plate 5 protective sheet 12 stopper 13 cushioning member 18 first hard layer 19 second hard layer 20 soft layer

Claims (4)

a glass plate laminate in which a glass plate and a protective sheet are laminated;
a pallet on which the glass plate laminate is loaded in a flat posture ;
a stopper that contacts the side portion of the glass plate laminate;
A glass plate package including a buffer member interposed between the glass plate laminate and the stopper,
The buffer member includes a first hard layer that contacts the side of the glass plate laminate, and a soft layer that is arranged between the first hard layer and the stopper ,
The first hard layer is made of a resin having a 25% compressive stress of 200 kPa or more,
The glass plate package , wherein the soft layer is made of a resin having a 25% compressive stress of 50 kPa or less . 2. The glass sheet package according to claim 1, wherein said cushioning member comprises a second hard layer arranged between said soft layer and said stopper. The glass plate package according to claim 1 or 2 , wherein the first hard layer is made of a resin having closed cells. The glass plate package according to any one of claims 1 to 3 , wherein the soft layer is made of a resin having closed cells.

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