JP2021041957A - Pallet for glass plate packing, glass plate package and manufacturing method of glass plate package - Google Patents

Abstract

To provide a pallet for glass plate packing, a glass plate package and a manufacturing method of a glass plate package which can reduce gaps between glass plates when loading glass plates.SOLUTION: A pallet for glass plate packing 3 comprises a base part 4 in which a glass plate laminate 2 including a plurality of glass plates G and a protective sheet P is housed upward in a vertical posture, a back support part 5 that supports the back surface of the glass plate laminate 2 and a bottom support part 6 that supports the bottom of the glass plate laminate 2. The bottom support part 6 includes an intervening member 9 and a cover member 10 arranged above the intervening member 9 between the base part 4 and the glass plate laminate 2. The cover member 10 is arranged over the entire length of the bottom of the glass plate G. The intervening member 9 is composed of a laminate including a bottom cushioning material 11 and a spacer 12 and the spacer 12 is arranged only in the middle part of the bottom of the glass plate G.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pallet for packing a glass plate, a glass plate packing body, and a method for manufacturing the glass plate packing body.

When storing and transporting various glass plates such as glass substrates for flat panel displays such as liquid crystal displays, pallets for packing glass plates are used.

As a basic structure, this type of pallet has a base portion in which a glass plate laminate in which a plurality of glass plates are laminated in a vertical position via a protective sheet (for example, interleaving paper) is housed upward. It includes a back surface support portion that supports the back surface side of the glass plate laminate, and a bottom support portion that supports the bottom surface side of the glass plate laminate.

For example, Patent Document 1 discloses that the bottom support portion includes a resin sheet material as a cushioning material in order to prevent the glass plate from being damaged by impact, vibration, or the like. Further, the same document discloses that a low friction sheet material is arranged as a cover member on the resin sheet material in order to improve the sliding of the bottom surface of the glass plate.

JP-A-2017-65726

Patent Document 1 does not disclose a specific arrangement mode of the resin sheet material as a cushioning material and the low friction sheet material as a cover member in the direction along the bottom surface of the glass plate, but the cushioning material and the cover member When each is arranged over the entire length of the bottom of the glass plate, the following problems may occur.

That is, the cover member is supported from below by the cushioning material at positions corresponding to the corners formed at both ends of the bottom surface of the glass plate. Therefore, when the glass plate is loaded, if the corner of the bottom of the glass plate pushes the cover member downward by gravity, the cover member receives the reaction force from the cushioning material and easily bites into the corner of the glass plate. As a result, the corners of the glass plates are caught by the cover member and the glass plates cannot be moved to the correct position, so that a gap is easily formed between the glass plates. If a gap is formed between the glass plates in this way, not only the loading efficiency of the glass plates deteriorates, but also damage such as cracking of the glass plates may occur. Although Patent Document 1 discloses that a low-friction sheet material is used as the cover member, the catching of the corners of the glass plate is mainly due to the arrangement mode of the cushioning material and the cover member, that is, a structural problem. Can occur as. Therefore, it is considered difficult to reduce the gap between the glass plates caused by the catching of the corners of the glass plates only by the material approach.

An object of the present invention is to provide a pallet for packing glass plates, a glass plate packing body, and a method for manufacturing a glass plate packing body, which can reduce the gap between the glass plates when the glass plates are loaded.

The pallet for packing a glass plate according to the present invention, which was devised to solve the above problems, has a base portion in which a glass plate laminate including a glass plate and a protective sheet is housed upward in a vertical position, and a glass plate. A glass plate packing pallet including a back support portion that supports the back surface of the laminate and a bottom support portion that supports the bottom of the glass plate laminate, and the bottom support portion is a base portion and a glass plate laminate. An intervening member and a cover member arranged above the intervening member are provided between the two, and the cover member is arranged over the entire length of the bottom surface of the glass plate, and at least a part of the intervening member is of the glass plate. It is characterized in that it is arranged only in the middle part of the bottom.

In this way, a space in which no intervening member is arranged is formed below the cover member at positions corresponding to the corners formed at both ends of the bottom surface of the glass plate. Therefore, even if the corner of the bottom of the glass plate pushes the cover member downward by gravity, the cover member can be deformed so as to retract downward by utilizing the space in which the intervening member is not arranged. Therefore, when the glass plates are loaded, the corners are less likely to be caught, and it is possible to reduce the formation of gaps between the glass plates.

In the above configuration, it is preferable that the intervening member is composed of a laminated body of a plurality of constituent members, and at least a part of the constituent members is arranged only in the middle portion of the bottom surface of the glass plate.

In this way, even when the intervening member is composed of a laminated body of a plurality of constituent members, the corners are less likely to be caught when the glass plates are loaded, and a gap is formed between the glass plates. Can be reduced.

In the above configuration, it is preferable that the intervening member includes a cushioning material and a spacer as constituent members, and the spacer is arranged only in the middle portion of the bottom surface of the glass plate.

Glass plates of various sizes may be loaded on the pallets for packing glass plates. In this case, it is necessary to prepare a plurality of types of constituent members of the intervening members arranged only in the intermediate portion of the bottom surface of the glass plate, depending on the dimensions of the bottom surface of the glass plate. However, since the cushioning material is expensive, the cost increases if a plurality of types of cushioning materials are prepared according to the size of the bottom surface of the glass plate. On the other hand, if the spacers are arranged only in the middle portion of the bottom surface of the glass plate as in the above configuration, it is sufficient to prepare a plurality of types of spacers, which are cheaper than the cushioning material, according to the dimensions of the bottom surface of the glass plate. Therefore, the increase in cost can be suppressed.

In this case, the spacer is preferably made of a plurality of cardboard laminates.

In this way, since the corrugated cardboard laminate is inexpensive, the increase in cost can be further suppressed. Further, since the corrugated cardboard laminate is easy to cut, it can easily correspond to glass plates having various sizes. Further, if it is a corrugated cardboard laminate, it does not interfere with the function of the cushioning material.

In the above configuration, the cushioning material preferably includes a foamed resin material and a rubber material.

In this way, the cushioning material can absorb various shocks and vibrations according to the shock and vibration absorption performances of the foamed resin material and the rubber material, respectively.

In the above configuration, the cover member is preferably made of cardboard.

In this way, it is harder to tear than a slip sheet. Further, due to such an advantage, the shape of the support surface of the cover member is stable, and the catching of the corner portion of the glass plate can be further reduced.

The glass plate packing body according to the present invention, which was devised to solve the above problems, is characterized in that the glass plate laminated body is packed in a glass plate packing pallet having the above configuration as appropriate.

In this way, it is possible to enjoy the same effect as the corresponding configuration described above.

The method for manufacturing a glass plate packing body according to the present invention, which was devised to solve the above problems, is to put a plurality of glass plates in a vertical position on a glass plate packing pallet having the above configuration as appropriate. It is characterized by comprising a step of laminating through.

In this way, it is possible to enjoy the same effect as the corresponding configuration described above.

According to the present invention, it is possible to provide a pallet for packing glass plates, a glass plate packing body, and a method for manufacturing a glass plate packing body, which can reduce the gap between the glass plates when the glass plates are loaded.

It is a perspective view of the glass plate packing body which concerns on this embodiment. It is a front view of the glass plate packing body of FIG. It is a side view of the glass plate packing body of FIG. It is a perspective view which shows the state which fixed the glass plate laminated body in the glass plate packing body of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, the glass plate packing body 1 according to the present embodiment includes a glass plate laminated body 2 and a glass plate packing pallet (hereinafter, simply referred to as a pallet) 3. For convenience of explanation, the X direction in the figure is the front-back direction, and the Y direction in the figure is the width direction.

The glass plate laminate 2 is formed by alternately laminating a plurality of glass plates G and a protective sheet P in a vertical posture (in an inclined posture in the present embodiment). In the present embodiment, both the glass plate G and the protective sheet P have a rectangular shape, and the protective sheet P is arranged on the frontmost side and the backmost side of the glass plate laminate 2.

The number of glass plates G of the glass plate laminate 2 is, for example, 200 to 400. The size of the glass plate G is, for example, 730 mm × 920 mm to 3200 × 3600 mm, and the thickness of the glass plate G is, for example, 300 μm to 1500 μm. The glass plate G is, for example, a glass substrate for a flat panel display.

As the protective sheet P, for example, interleaving paper (pure pulp paper), foamed resin sheet, or the like can be used. The size of the protective sheet P is preferably larger than that of the glass plates G so that the glass plates G do not come into direct contact with each other. That is, the protective sheet P may protrude laterally and / or upward in the width direction of the glass plate G. However, from the viewpoint of preventing a work error of a robot such as a loading device or an unloading device of the glass plate G from occurring, it is preferable that the protective sheet P does not protrude below the glass plate G.

The pallet 3 has a base portion 4 in which the glass plate laminate 2 is housed upward, a back support portion 5 that supports the back surface of the glass plate laminate 2 on a flat surface, and a flat surface that supports the bottom surface of the glass plate laminate 2. It is provided with a bottom support portion 6.

The base portion 4 is made of a metal frame such as stainless steel, carbon steel, or an aluminum alloy.

The back support portion 5 includes a back portion 7 that stands up from the rear side of the base portion 4, and a back cushioning material 8 provided on the front surface of the back portion 7. In the present embodiment, the back cushioning material 8 supports the entire back surface of the glass plate G included in the glass plate laminate 2. The protruding portion of the protective sheet P protruding from the glass plate G may or may not be supported by the back cushioning material 8.

The back surface 7 is made of a metal frame such as stainless steel, carbon steel, or an aluminum alloy.

As the back cushioning material 8, for example, a rubber plate, a foamed resin plate, or a laminate thereof can be used. As the foamed resin plate, for example, one formed by using foamed polypropylene, urethane foam, styrene foam, melamine foam or the like as a main material can be used. In the present embodiment, the back cushioning material 8 is a foamed polypropylene plate.

The bottom support portion 6 includes an intervening member 9 and a cover member 10 arranged above the intervening member 9 between the base portion 4 and the glass plate laminate 2.

The cover member 10 is arranged over the entire length of the bottom surface of the glass plate G, and comes into direct contact with the bottom surface of the glass plate G.

As the cover member 10, for example, cardboard, plastic cardboard, glass interleaving paper, foamed resin sheet, or the like can be used. In this embodiment, it is composed of cardboard. The cardboard constituting the cover member 10 is made of paperboard such as chip cardboard, and includes the form of corrugated cardboard having a multi-layered paperboard structure. If the cover member 10 is made of corrugated cardboard in this way, there is an advantage that it is hard to tear. In the present embodiment, the cover member 10 is a single plate material continuous in the width direction of the glass plate laminate 2. The thickness of the cover member 10 is preferably, for example, 0.5 mm to 2 mm. The cover member 10 may be reused, but in the present embodiment, the cover member 10 is discarded when it is used once for transportation.

The intervening member 9 is composed of a laminated body of a plurality of constituent members, and at least a part of the constituent members is arranged only in an intermediate portion excluding both ends of the bottom surface of the glass plate G. That is, a space S in which the intervening member 9 is not arranged is formed below both ends in the width direction of the cover member 10 that supports the corners formed at both ends of the bottom of the glass plate G. In this way, even if the corner of the bottom of the glass plate G pushes the cover member 10 downward due to gravity, the cover member 10 slightly bends downward using the space S in which the intervening member 9 is not arranged. It is possible to prevent the corners of the bottom surface of the glass plate G from biting into the cover member 10. Therefore, when the glass plates G are loaded, the corners of the bottom surface of the glass plates G are less likely to be caught, and it is possible to reduce the formation of gaps between the glass plates G.

As shown in FIG. 2, the width dimension W of the space S (or the protruding portion of the cover member 10 from the intervening member 9) in which the intervening member 9 is not arranged can be appropriately changed depending on the dimension of the glass plate G. However, it can be, for example, 50 mm to 300 mm, preferably 100 to 200 mm. Further, the height dimension H (or the thickness of the spacer 12 described later) of the space S in which the intervening member 9 is not arranged can be appropriately changed depending on the dimension of the glass plate G, but may be, for example, 2 mm to 20 mm. It can be made, preferably 3 to 5 mm.

It is conceivable that the cover member 10 is arranged only in the middle portion of the bottom surface of the glass plate G, but in this case, the corner portion of the glass plate G becomes free and the movement resistance of the glass plate G becomes too small. As a result, the glass plate G may move on the cover member 10 during transportation, causing damage to the glass plate G and the cover member 10, or causing dirt due to dust generation to adhere to the glass plate G. Therefore, in order to prevent the occurrence of such a problem, the cover member 10 is arranged over the entire length of the bottom surface of the glass plate G as described above.

In the present embodiment, the intervening member 9 is composed of a laminated body including a bottom cushioning material 11 and a spacer 12 arranged above the bottom cushioning material 11 as a constituent member, and the bottom cushioning material 11 is a glass plate. The spacer 12 is arranged over the entire length of the bottom surface of the glass plate G, and the spacer 12 is arranged only in the middle portion of the bottom surface of the glass plate G. As the constituent members of the intervening member 9 arranged only in the intermediate portion of the bottom surface of the glass plate G, it is necessary to prepare those having various dimensions according to the dimensions of the bottom surface of the glass plate. However, when the bottom cushioning material 11 is arranged only in the middle portion of the bottom of the glass plate G, since the bottom cushioning material 11 is expensive, a plurality of types of the bottom cushioning material 11 are prepared according to the dimensions of the bottom of the glass plate G. Then the cost increases. On the other hand, when the spacer 12 is arranged only in the middle portion of the bottom surface of the glass plate G, the spacer 12 is cheaper than the bottom cushioning material 11, and therefore, a plurality of spacers 12 are provided according to the dimensions of the bottom surface of the glass plate G. Preparing the type does not increase the cost. Therefore, from the viewpoint of cost, it is preferable to arrange only the spacer 12 among the bottom cushioning material 11 and the spacer 12 only in the intermediate portion of the bottom side of the glass plate G. If the cost does not matter, both the bottom cushioning material 11 and the spacer 12 may be arranged only in the middle portion of the glass plate G, or the bottom cushioning material 11 may be placed on the bottom of the glass plate G. The spacer 12 may be arranged only in the middle portion of the glass plate G over the entire length of the bottom surface of the glass plate G.

The bottom cushioning material 11 is not particularly limited, but in the present embodiment, the foamed resin plate (foamed resin material) 13 and the rubber plate (rubber material) 14 arranged on the upper surface of the foamed resin plate 13 are formed. I have. In the present embodiment, the foamed resin plate 13 and the rubber plate 14 are single plate materials that are continuous in the width direction of the glass plate laminate 2, respectively. The bottom cushioning material 11 (particularly the foamed resin plate 13) may be discarded when it is used once for transportation, but in the present embodiment, it is used multiple times for transportation and has cushioning performance (thickness recovery, etc.). Replace when becomes low.

As the foamed resin plate 13, for example, a foamed resin plate 13 formed by using foamed polypropylene, urethane foam, styrene foam, melamine foam, or the like as a main material can be used. In the present embodiment, the foamed resin plate 13 is a foamed polypropylene plate. The thickness of the foamed resin plate 13 is preferably, for example, 10 mm to 30 mm.

The foaming ratio of the foamed resin plate 13 is preferably 10 to 40 times. In this way, it is possible to achieve both an appropriate cushioning property for the glass plate G and a good thickness recovery property. That is, if the foaming ratio of the foamed resin plate 13 is less than 10 times, the foamed resin plate 13 tends to be too hard, so that the desired cushioning property may not be obtained. On the other hand, if the foaming ratio of the foamed resin plate 13 exceeds 40 times, the foamed resin plate 13 tends to be too soft, so that the glass plate G may bounce during the loading work of the glass plate G, making handling difficult. , There is a risk that it will be difficult to reuse due to the deterioration of the recoverability of the thickness. Therefore, in order to avoid such a problem, the foaming ratio of the foamed resin plate 13 is preferably within the above numerical range.

The rubber plate 14 is preferably made of, for example, natural rubber and has a type A durometer hardness of 50 to 70. The thickness of the rubber plate 14 is preferably, for example, 2 mm to 10 mm. By including the foamed resin plate 13 and the rubber plate 14 in the bottom cushioning material 11 in this way, it is possible to absorb a wide range of shocks and vibrations according to the respective shock / vibration absorption performances. Further, the rubber plate 14 can be expected to have the effect of reducing the compressive deformation of the foamed resin plate 13. From the viewpoint of efficiently absorbing shocks and vibrations, the thickness of the rubber plate 14 is preferably smaller than the thickness of the foamed resin plate 13. The rubber plate 14 may be omitted.

As the spacer 12, for example, cardboard, plastic cardboard, glass interleaving paper, foamed resin sheet, or the like can be used. In the present embodiment, the spacer 12 is composed of a stack of a plurality of cardboard sheets. Each cardboard constituting the spacer 12 is a single plate material continuous in the width direction of the glass plate laminate 2. The thickness of each cardboard constituting the spacer 12 can be, for example, 0.3 to 3 mm, preferably 0.5 to 1.5 mm. The number of corrugated cardboards constituting the spacer 12 can be, for example, 1 to 10 (3 in the illustrated example), and is preferably 3 to 5. It is preferable that each cardboard constituting the spacer 12 has the same thickness as the cardboard constituting the cover member 10. In this way, the original cardboard can be shared between the spacer 12 and the cover member 10 simply by changing the cut size.

As shown in FIG. 3, the upper surface of the bottom support portion 6, that is, the upper surface of the cover member 10 is at a predetermined angle θ1 (for example, 5 ° to 25 °) with respect to the horizontal direction, and increases as the distance from the back support portion 5 increases. It is tilted in the direction of transition to. Further, the front surface of the back surface support portion 5, that is, the front surface of the back surface cushioning material 8 is at a predetermined angle θ2 (for example, 5 ° to 25 °) with respect to the vertical direction, and the direction is such that the front surface of the back surface support portion 5 moves rearward as the distance from the bottom support portion 6 increases. It is inclined to. At this time, the front surface of the back surface support portion 5 is formed at a substantially right angle to the upper surface of the bottom support portion 6, for example.

The glass plate packing body 1 having the above configuration is shipped (transported) in a state where the glass plate laminate 2 is fixed to the pallet 3 by, for example, a predetermined fixing means. The fixing means is not particularly limited, but as shown in FIG. 4, the fixing means is arranged between the belt 15 that binds the glass plate laminate 2 and the front surface of the belt 15 and the glass plate laminate 2. A member 16 and a side stopper 17 arranged between the belt 15 and the side portion of the glass plate laminate 2 can be used. As shown in FIG. 1, for example, both ends of the belt 15 in the longitudinal direction are hung on hooks 18 provided on the back support portion 5 in a state where the glass plate laminate 2 is housed in a predetermined position on the pallet 3 in a vertical posture. It is fixed in a double state, tightened by a ratchet or the like (not shown) on the front surface of the pressing member 16. As a result, the glass plate laminate 2 is fixed to the pallet 3 in a state where the movement in the front-back and left-right directions is restricted.

At this time, as shown in FIG. 4, the frame plate 19 is placed on the frontmost side of the glass plate laminate 2, and the frame plate 19, the glass plate laminate 2, and the pressing member 16 are backed by the belt 15. It may be pressed toward the support portion 5. Further, in order to prevent dust from adhering to the glass plate laminate 2, the glass plate laminate 2 may be covered with a protective bag or wrapped with a protective film.

The glass plate packing body 1 having the above configuration is manufactured through a manufacturing process including a step of alternately laminating a glass plate G and a protective sheet P on an empty pallet 3 in a vertical posture. For example, a robot is used for loading the glass plate G and the protective sheet P on the pallet 3.

The present invention is not limited to the configuration of the above-described embodiment, and is not limited to the above-mentioned action and effect. The present invention can be modified in various ways without departing from the gist of the present invention.

In the above embodiment, the case where the intervening member 9 is composed of a laminated body of a plurality of constituent members has been described, but the intervening member 9 may be composed of a single member. In this form, a part or all of the intervening member 9 is arranged only in the middle portion of the bottom surface of the glass plate G. More specifically, when all of the intervening members 9 are arranged only in the middle portion of the bottom side of the glass plate G, for example, the intervening members 9 are not arranged at both ends of the bottom side of the glass plate G. When a part of the intervening member 9 is arranged only in the middle portion of the bottom surface of the glass plate G, for example, the thickness of the intervening member 9 at both ends of the bottom surface of the glass plate G is the intermediate portion of the bottom surface of the glass plate G. It is thinner than the thickness of the intervening member 9 in the above. Alternatively, the intervening member 9 is provided with a gap in the middle in the thickness direction at both ends of the bottom surface of the glass plate G. The intervening member 9 can be made of, for example, a foamed resin plate or a rubber plate.

In the above embodiment, the constituent members of the back surface support portion 5 and / or the bottom support portion 6 may be simply mounted separably without interposing an adhesive layer with each other. In this way, since no adhesive is used in the back surface support portion 5 and / or the bottom support portion 6, it is possible to reliably prevent the glass plate G from being contaminated by the adhesive. Here, since the bottom support portion 6 is likely to generate a pollution source derived from the adhesive due to vibration, impact, or the like, it is preferable to adopt a configuration in which the bottom support portion 6 does not use the adhesive. Of course, each component of the back surface support portion 5 and / or the bottom support portion 6 may be fixed with an adhesive or the like.

In the above embodiment, the case where the rubber plate 14 is arranged on the upper surface of the foamed resin plate 13 as the bottom cushioning material 11 has been described, but the rubber plate 14 may be arranged only on the lower surface of the foamed resin plate 13. Rubber plates 14 may be arranged on the upper and lower surfaces of the foamed resin plate 13, respectively. When the rubber plates 14 are arranged on the upper and lower surfaces of the foamed resin plate 13, the rubber plates 14 arranged on the upper surface side of the foamed resin plate 13 and the rubber plates 14 arranged on the lower surface side of the foamed resin plate 13 are The thickness and material may be different.

In the above embodiment, the case where the foamed resin plate 13 is composed of one foamed resin plate 13 has been described, but the foamed resin plate 13 may be a laminate of a plurality of foamed resin plates. In this case, the plurality of foamed resin plates 13 may be directly laminated or may be laminated via a rubber material.

In the above embodiment, the case where each component of the cover member 10 and the intervening member 9 is composed of one plate material continuous in the width direction of the glass plate laminate 2 has been described, but the size of the glass plate G is large. In the case of a large size, these members may be divided into a plurality of members in the width direction of the glass plate laminate 2.

1 Glass plate packing body 2 Glass plate laminated body 3 Glass plate packing pallet 4 Base part 5 Back support part 6 Bottom support part 7 Back part 8 Back cushioning material 9 Intervening member 10 Cover member 11 Bottom cushioning material 12 Spacer 13 Foamed resin Plate 14 Rubber plate G Glass plate P Protective sheet S Space

Claims (8)

A base portion in which a glass plate laminate including a glass plate and a protective sheet is housed upward in a vertical posture, a back support portion that supports the back surface of the glass plate laminate, and a bottom surface of the glass plate laminate are supported. In a glass plate packing pallet provided with a bottom support
The bottom support portion includes an intervening member and a cover member arranged above the intervening member between the base portion and the glass plate laminate.
The cover member is arranged over the entire length of the bottom surface of the glass plate.
A pallet for packing a glass plate, wherein at least a part of the intervening member is arranged only in an intermediate portion of the bottom surface of the glass plate. The intervening member is composed of a laminated body of a plurality of constituent members.
The pallet for packing a glass plate according to claim 1, wherein at least a part of the constituent members is arranged only in the middle portion of the bottom surface of the glass plate. The intervening member includes a cushioning material and a spacer as the constituent members.
The pallet for packing a glass plate according to claim 2, wherein the spacer is arranged only in the middle portion of the bottom surface of the glass plate. The pallet for packing a glass plate according to claim 3, wherein the spacer is made of a laminated body of a plurality of cardboards. The pallet for packing a glass plate according to claim 3 or 4, wherein the cushioning material includes a foamed resin material and a rubber material. The pallet for packing a glass plate according to any one of claims 1 to 5, wherein the cover member is made of cardboard. A glass plate packing body obtained by packing the glass plate laminate in the glass plate packing pallet according to any one of claims 1 to 6. A method for manufacturing a glass plate packing body, comprising a step of laminating a plurality of the glass plates in a vertical position via the protective sheet on the glass plate packing pallet according to any one of claims 1 to 6.

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