阅读说明：本技术 玻璃板捆包体 (Glass plate package body ) 是由 内田势津夫 安田广 西川佳范 张凯 李明浩 崔洪国 于 2019-10-17 设计创作，主要内容包括：一种玻璃板捆包体(1),具备通过以在最下层配置有保护片(2x)的状态将玻璃板(3)和保护片(2)以平置姿态层叠而成的层叠体(4)以及装载层叠体(4)的托盘(5),托盘(5)具有从下方支承层叠体(4)的支承台(7),最下层的保护片(2x)固定于支承台(7)。(A glass plate package (1) is provided with a laminate (4) formed by laminating glass plates (3) and protective plates (2) in a flat posture with the protective plates (2x) arranged at the lowermost layer, and a tray (5) for loading the laminate (4), wherein the tray (5) is provided with a support table (7) for supporting the laminate (4) from below, and the protective plates (2x) at the lowermost layer are fixed on the support table (7).)

1. A glass plate package body is provided with: a laminate formed by laminating a glass plate and a protective sheet in a flat posture with the protective sheet disposed on the lowermost layer; and a tray on which the stacked body is loaded,

the glass plate package body is characterized in that,

the tray has a support table for supporting the stacked body from below,

the protective sheet of the lowermost layer is fixed to the support table.

2. The glass plate package of claim 1,

the protective sheet of the lowermost layer is fixed to the support table by an adhesive tape.

3. The glass plate package of claim 1,

the lowermost protective sheet is fixed to the support base by a holder that sandwiches and holds the lowermost protective sheet.

4. The glass plate package of claim 3,

the holder sandwiches the lowermost protective sheet in a state that allows the lowermost protective sheet to be offset with respect to the holder.

5. The glass plate package according to claim 3 or 4,

the holder sandwiches the lowermost protective sheet by the magnetic force of the magnet.

6. The glass plate package according to any one of claims 3 to 5,

at least a part of a portion of the holder, which sandwiches the lowermost protective sheet, is made of resin.

7. The glass plate package according to any one of claims 3 to 6,

the lowermost protective sheet is sandwiched between the holding members in a bent state.

8. The glass plate package according to any one of claims 3 to 7,

the holder has a pair of holding portions for sandwiching the protective sheet at the lowermost layer from the front and back,

the pair of clamping portions are connected to each other via a hinge.

9. The glass plate package according to any one of claims 3 to 8,

the support table has an upper surface for supporting the laminate and a side surface connected to the upper surface,

the end portion of the protective sheet of the lowermost layer is fixed to the side surface of the support table by the holder.

10. The glass plate package according to any one of claims 1 to 9,

the glass plate has a rectangular shape, and the protective sheet has a protruding portion protruding from an end of the glass plate,

the tray includes a support portion for supporting the protruding portion of the protective sheet other than the lowermost protective sheet from below,

the support portion is disposed along at least one of an end portion of one side and an end portion of the other side of the glass plate where the corner portion is formed.

11. The glass plate package according to any one of claims 3 to 9,

the glass plate has a rectangular shape, and the protective sheet has a protruding portion protruding from an end of the glass plate,

the holder supports the protruding portion of the protective sheet other than the lowermost protective sheet from below,

the holder is disposed along at least one of an end of one side and an end of the other side of the glass sheet forming the corner.

Technical Field

The present invention relates to a glass plate package.

Background

As is well known, a glass plate is used as a glass substrate for flat panel displays typified by liquid crystal displays, plasma displays, and organic EL displays. Since glass sheets are easily broken, a method of packaging glass sheets during storage and transportation is extremely important.

Here, patent document 1 discloses a glass plate package suitable for the above-described packaging of glass plates. In this package, the glass plates and the protective sheets are alternately stacked in a flat posture with the protective sheets disposed at the lowermost layer to form a laminate, and the laminate is packed in a state of being mounted on a tray. As the protective sheet, for example, interleaving paper is used. According to this packaging method, the weight of the glass sheet is mainly supported by the main surface of the glass sheet, and therefore, there is an advantage that it is difficult to apply an unnecessary load to the end portion of the glass sheet which is easily broken.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2013-224182

Disclosure of Invention

Problems to be solved by the invention

When the glass plate package is opened and the glass plates are taken out from the laminate, for example, a taking-out method as shown in fig. 14 and 15 may be employed.

In this embodiment, the robot 300 that sucks and takes out the uppermost glass plate 200 from the laminated body 100 as shown in fig. 14 and the robot 500 that sucks and takes out the uppermost protective sheet 400 from the laminated body 100 as shown in fig. 15 are alternately operated. Thereby, the plurality of glass plates 200 are sequentially taken out of the laminate 100. The stack 100 is loaded on the tray 600 in a state of being supported from below by the support base 600 a.

When both the robots 300 and 500 are operated, the glass plate 200 and the protective sheet 400 are easily taken out.

As shown in fig. 14, when the robot 300 is operated, the pressing member 700 presses the end of the protective sheet 400 protruding from the end of the glass plate 200 constituting the laminate 100. In this way, the protective sheet 400 attached directly below the uppermost glass sheet 200 sucked by the robot 300 is prevented from being removed. On the other hand, as shown in fig. 15, when the robot 500 is operated, a gas 800a (e.g., air) is injected from the nozzle 800 in order to separate the protective sheet 400 on the uppermost layer adsorbed by the robot 500 from the glass plate 200 directly below the protective sheet 400 so as to avoid the adhesion therebetween.

However, when the above-described assistance is performed at the time of taking out the glass plate, the following problems to be solved arise.

That is, as shown in fig. 16, when the number of glass plates 200 constituting the laminated body 100 is reduced (only one glass plate in the illustrated example) as the removal proceeds, when the robot 500 removes the protective sheet 400 at the uppermost layer, the gas 800a may enter between the support base 600a and the protective sheet 400 at the lowermost layer, and the glass plates 200 may float from the support base 600a together with the protective sheet 400 at the lowermost layer. If this occurs, the position of the glass plate 200 with respect to the support base 600a is displaced, and the robot 300 cannot accurately suck the glass plate 200 or the like, resulting in a problem of poor removal.

The present invention has been made in view of the above circumstances, and an object of the present invention is to establish a technique capable of avoiding the occurrence of a defective extraction even when the extraction by gas injection is assisted when the glass plate package is opened and the glass plates are extracted from the laminate.

Means for solving the problems

The present invention for achieving the above object is a glass plate package body including: a laminate formed by laminating a glass plate and a protective sheet in a flat posture with the protective sheet disposed on the lowermost layer; and a tray on which the laminate is mounted, wherein the tray has a support base for supporting the laminate from below, and the protective sheet at the lowermost layer is fixed to the support base.

In this package, the protective sheet at the lowermost layer is fixed to the support base. Therefore, even when the removal of the glass plate from the laminate is assisted by the ejection of the gas during opening, the lowermost protective sheet can be prevented from floating from the support base due to the gas. Therefore, even when the number of glass plates constituting the laminate is reduced as the removal proceeds, the glass plates can be prevented from being lifted from the support base in the same manner, and the positional displacement of the glass plates with respect to the support base can be prevented. As a result, the occurrence of defective removal of the glass plate can be avoided.

In the above-described configuration, the protective sheet at the lowermost layer may be fixed to the support base by an adhesive tape.

In this way, since the lowermost protective sheet is fixed to the support base by the adhesive tape, a desired portion of the protective sheet can be fixed to the support base without involving troublesome work by merely changing the adhesion position of the adhesive tape.

In the above-described configuration, the protective sheet at the lowermost layer may be fixed to the support base by a holder that sandwiches and holds the protective sheet at the lowermost layer.

In this way, since the protective sheet is fixed to the support base by sandwiching the protective sheet at the lowermost layer by the holder, the risk of contamination of the glass plates constituting the laminated body with an adhesive or the like can be reliably eliminated. Further, the elimination of the presence of the adhesive or the like is advantageous, for example, in the case where the glass plate package body needs to be carried into a clean room.

In the above-described configuration, it is preferable that the holder sandwiches the lowermost protective sheet in a state in which the lowermost protective sheet is allowed to be displaced with respect to the holder.

In this way, since the lowermost protective sheet is allowed to be displaced from the holder, it is possible to avoid a problem that the protective sheet is broken due to vibration or the like during conveyance.

In the above configuration, the holder preferably sandwiches the protective sheet at the lowermost layer by the magnetic force of the magnet.

In this way, the protective sheet of the lowermost layer can be sandwiched only by the magnetic force, and thus the durability of the holder can be improved. This can prevent as much as possible an increase in cost associated with replacement of a deteriorated holder.

In the above configuration, it is preferable that at least a part of a portion of the holder, which sandwiches the protective sheet of the lowermost layer, is made of resin.

In this way, the resin exerts a slip-preventing effect, and thus, the shift of the lowermost protective sheet with respect to the holder beyond the allowable range can be avoided.

In the above configuration, it is preferable that the portion of the protective sheet at the lowermost layer sandwiched by the holding material is sandwiched in a bent state.

In this way, the bent portion of the lowermost protective sheet hinders the displacement of the protective sheet with respect to the holder. Therefore, it is more advantageous in avoiding the deviation of the protective sheet of the lowermost layer beyond the allowable range.

In the above configuration, it is preferable that the holder has a pair of holding portions for sandwiching the protective sheet at the lowermost layer from the front and back, and the pair of holding portions are connected to each other via a hinge.

In this way, by using a simple structure such as a hinge that is difficult to break, the protective sheet at the lowermost layer can be sandwiched and released by the pair of clamping portions. This can prevent the components constituting the holder from falling off the holder as much as possible. As a result, the quality of the final product can be prevented from being deteriorated due to the mixing of the components, and the manufacturing equipment can be prevented from being damaged.

In the above-described configuration, it is preferable that the support base has an upper surface for supporting the stacked body and a side surface continuous to the upper surface, and an end portion of the protective sheet at the lowermost layer is fixed to the side surface of the support base by the holder.

In this way, the holder is positioned on a surface (side surface) different from the upper surface supporting the stacked body, and therefore interference between the holder and the stacked body can be reliably prevented. Since the end portion of the protective sheet at the lowermost layer is positioned on the side surface of the support base, the gap formed between the protective sheet at the lowermost layer and the support base is opened downward. Thus, the gas injected during the assistance of the removal of the glass sheet is extremely difficult to enter the gap. Therefore, the lowermost protective sheet can be more appropriately prevented from floating from the support base. As a result, the occurrence of defective removal of the glass plate can be more favorably avoided.

In the above-described configuration, it is preferable that the glass plate has a rectangular shape, the protective sheet has a protruding portion protruding from an end portion of the glass plate, the tray includes a support portion that supports the protruding portion of the protective sheet other than the protective sheet at the lowermost layer from below, and the support portion is disposed along at least one of an end portion on one side and an end portion on the other side of the glass plate where the corner portion is formed.

In the case where the protective sheet constituting the laminate has the protruding portion protruding from the end of the glass plate, the protruding portion is more likely to bend downward as the protective sheet is disposed at the lower layer. Therefore, when the glass plate package is opened and the glass plates and the protective sheet are taken out from the laminate, when the protective sheet located in the vicinity of the lowermost layer before the opening is taken out by a robot or the like, the bent protruding portion of the protective sheet to be taken out may be caught at a corner portion of the protective sheet or glass plate which is not the object to be taken out. When this occurs, the protective sheet slips and shifts relative to the robot, which causes a failure in removing the protective sheet. Here, hooking of the protruding portion is easily generated at the periphery of the corner of the rectangular glass plate. Therefore, as a countermeasure, if the support portion is disposed as described above, the downward bending of the protruding portion can be appropriately avoided by the support from below by the support portion. As a result, the problem caused by the hooking can be eliminated. Specifically, if the support portion is disposed along at least one of the one end portion and the other end portion of the glass plate where the corner portion is formed, the support portion first supports the protruding portion protruding from the one end portion, and the protruding portion can be prevented from being bent downward. Further, if the extension portion extending from one end portion is prevented from being bent, the extension portion extending from the remaining one end portion, which is continuous with the extension portion, is also prevented from being bent downward, and thus the above-described problem caused by the hook is solved.

In the above-described configuration, it is preferable that the glass plate has a rectangular shape, and the protective sheet has a protruding portion protruding from an end portion of the glass plate, the protruding portion of the protective sheet other than the protective sheet at the lowermost layer is supported from below by a holder, and the holder is disposed along at least one of an end portion on one side and an end portion on the other side of the glass plate where the corner portion is formed.

In this way, the downward bending of the protruding portion can be appropriately avoided by the downward support by the holder. Further, since the holder is used as the support portion, the structure of the package body can be simplified, and the facility cost can be reduced.

Effects of the invention

According to the present invention, even when the assistance of the extraction by the gas injection is performed when the glass plate package is opened and the glass plates are extracted from the laminate, the occurrence of the extraction failure can be avoided.

Drawings

Fig. 1 is a perspective view showing a glass plate package according to a first embodiment.

Fig. 2 is a perspective view showing a tray provided in the glass plate package of the first embodiment.

Fig. 3 is a plan view showing a tray provided in the glass plate package of the first embodiment.

Fig. 4 is a sectional view showing a holder used in the glass plate package of the first embodiment.

Fig. 5 is a sectional view showing a holder used in the glass plate package of the second embodiment.

Fig. 6 is a sectional view showing a holder used in the glass plate package of the third embodiment.

Fig. 7 is a side view showing a holder used in the glass plate package of the fourth embodiment.

Fig. 8 is a side view showing an adhesive tape used for the glass plate package of the fifth embodiment.

Fig. 9 is a perspective view showing a holder used in the glass plate package of the sixth embodiment.

Fig. 10 is a sectional view showing a holder used in the glass plate package of the seventh embodiment.

Fig. 11 is a perspective view showing a holder used in the glass plate package of the seventh embodiment.

Fig. 12 is a sectional view showing a holder used in the glass plate package of the eighth embodiment.

Fig. 13 is a sectional view showing a holder used in the glass plate package of the ninth embodiment.

Fig. 14 is a front view for explaining a problem of the related art.

Fig. 15 is a front view for explaining a problem of the related art.

Fig. 16 is a front view for explaining a problem of the related art.

Detailed Description

Hereinafter, a glass plate package according to an embodiment of the present invention will be described with reference to the drawings.

< first embodiment >

As shown in fig. 1, a glass plate package 1 according to a first embodiment of the present invention includes: a laminate 4 in which glass plates 3 and protective sheets 2 are alternately laminated in a flat posture with protective sheets 2x (hereinafter, referred to as lowermost layer sheets 2x) disposed at the lowermost layer; and a tray 5 on which the stacked body 4 is mounted.

Here, in fig. 1, for convenience of explanation, the end portions of the protective sheets 2 other than the lowermost sheet 2x are illustrated flush without protruding from the end portion of the glass plate 3. However, the protective sheet 2 has a larger area than the glass plate 3, and actually the end of the protective sheet 2 protrudes from the end of the glass plate 3 (see fig. 4). The end of the protective sheet 2 protruding from the end of the glass plate 3 constitutes an protruding portion 2 a. In the present embodiment, the lowermost sheet 2x has a larger area than the other protective sheet 2, and the extension 2a of the lowermost sheet 2x is longer than the extension 2a of the other protective sheet 2, but as in the ninth embodiment described later, the lowermost sheet 2x may have the same area as the other protective sheet 2, and the extension 2a of the lowermost sheet 2x may have the same length as the extension 2a of the other protective sheet 2 (see fig. 13).

The thickness of the glass plate 3 constituting the laminate 4 is preferably 0.2mm to 1.8mm, and more preferably 0.2mm to 0.5 mm. The glass plate 3 has a rectangular shape, and preferably has a length of one side of G5 size (1100mm to 1300mm) or more, and more preferably G8.5 size (2200mm to 2500mm) or more. The density of the glass plate 3 is preferably 2.0g/cm³～3.0g/cm³。

The thickness of the protective sheet 2 constituting the laminate 4 is preferably 0.05mm to 0.2mm, and more preferably 0.05mm to 0.1 mm. The protective sheet 2 has a rectangular shape having an area larger than that of the glass plate 3, and preferably has a length of one side of a size G5 (1100mm to 1300mm) or more, and more preferably a size G8.5 (2200mm to 2500mm) or more. In the present embodiment, interleaving paper is used as the protective sheet 2. However, the present invention is not limited to this, and a foamed resin sheet or the like may be used instead of the backing paper.

The tray 5 has: a base unit 6 mounted on a floor of a factory, a container of a transport vehicle, and the like; and a support base 7 which is disposed above the base portion 6 and supports the stacked body 4 from below. The lowermost layer sheet 2x is fixed to the support base 7, which will be described in detail later. Both the base portion 6 and the support base 7 are integrated by means of welding or the like, for example. In the present embodiment, both the base portion 6 and the support base 7 have a rectangular shape in a plan view (see fig. 3), and the support base 7 is formed smaller than the base portion 6. In the present embodiment, the rectangular shape of the glass plate 3 and the rectangular shape of the support base 7 have substantially the same area. In the present embodiment, the support base 7 is stacked on the base portion 6, but the present invention is not limited to this. The support base 7 may be eliminated, and the base portion 6 may function as a support base.

Insertion ports 8 into which support columns (not shown) can be inserted and attached are provided at four corners of the base 6. The pillars attached to the insertion holes 8 have a function of supporting the glass plate package 1 on the upper layer from below when the glass plate package 1 is stacked vertically in multiple stages. Further, fork holes 9 into which the forks of a forklift can be inserted are formed in each of the four side surfaces of the base portion 6.

The four side surfaces 7a of the support base 7 are respectively provided with a regulating plate 10 for regulating the lateral displacement (horizontal movement) of the glass plates 3 constituting the laminated body 4. The number of the limiting plates 10 is not particularly limited, but in the present embodiment, two (eight in total) limiting plates 10 are arranged on one side surface 7 a. The lower end of each limiting plate 10 is fixed to the side surface 7a of the support base 7 by a stopper (e.g., a bolt). The regulating plate 10 is removed when the glass plate package 1 is opened and the glass plate 3 is taken out from the laminate 4.

A pressing plate (not shown) is disposed on the upper surface of the laminate 4, and the laminate 4 is held on the support base 7 by fixing the pressing plate to the base 6 via a fastener (not shown) such as a tape. As the pressing plate, a cushioning plate made of foamed resin having a larger thickness and a higher hardness than the protective sheet 2 can be used. In order to prevent dust from adhering to the glass plates 3 constituting the laminate 4, the periphery of the laminate 4 is covered with a resin sheet (not shown) as necessary.

As shown in fig. 2, the support base 7 has a structure in which a base 7x formed in a lattice shape and made of metal such as aluminum alloy is superposed on a cushion plate 7y made of rubber, foamed resin, or the like. Thus, the upper surface of the cushion plate 7y constitutes an upper surface 7b of the support table 7 that supports the stacked body 4, and the side surfaces of the base 7x and the cushion plate 7y constitute a side surface 7a of the support table 7 that is continuous with the upper surface 7 b. The limiting plate 10 (not shown in the drawing, but removed) and a holder 11 for fixing only the lowermost layer sheet 2x to the support base 7, which will be described later, are attached to the base 7 x.

Here, in the present embodiment, the cushion plate 7y is directly stacked on the base 7x, but a plate made of aluminum alloy or stainless steel may be interposed between the base 7x and the cushion plate 7 y. The buffer plate 7y is not necessarily formed of a single plate, and may be divided into a plurality of small plates.

As shown in fig. 3, holders 11 are disposed on two parallel side surfaces 7a of the four side surfaces 7a of the support base 7, respectively, and the lowermost layer sheet 2x is fixed to the support base 7 by sandwiching and holding the lowermost layer sheet 2x by the holders 11 (see fig. 1). The holder 11 can sandwich the end of the lowermost layer sheet 2x extending from the end of the lowermost glass plate 3 included in the laminate 4 (see fig. 1) in the thickness direction thereof. Thus, the end of the lowermost sheet 2x is fixed to the side surface 7a of the support base 7 by the holder 11.

Here, in the present embodiment, the holder 11 is disposed on two parallel side surfaces 7a out of the four side surfaces 7a of the support base 7, but the holder 11 may be disposed on all the four side surfaces 7a, the holder 11 may be disposed by selecting three side surfaces 7a, or the holder 11 may be disposed by selecting only one side surface 7 a. It is preferable to determine which side surface 7a the holder 11 is disposed on, based on the following key.

First, the glass plate package 1 of the present embodiment has the following structure: this is suitable for assisting the extraction by the gas injection when the glass plate 3 is extracted from the laminate 4 at the time of opening. Further, as the gas injection method, for example, there is a method of injecting gas for separating the protective sheet 2 and the protective sheet 3 from each other so as to prevent the protective sheet 2 from sticking to the glass sheet 3 directly below the protective sheet 2 when the protective sheet 2 and the glass sheet 3 are alternately taken out from the laminated body 4 and the protective sheet 2 positioned at the uppermost layer is sucked and taken out by a robot. In such a spray method, it is preferable that the holder 11 is disposed at least on the side surface 7a of the support base 7 facing the nozzle of the gas. That is, the present embodiment is configured to be suitable for a case where two parallel side surfaces 7a of the four side surfaces 7a of the support base 7 face a nozzle of gas, respectively.

In the present embodiment, two (four in total) holders 11 are arranged on one side surface 7 a. Both the holders 11 disposed on the one side surface 7a are disposed in the vicinity of (outside of) the corner of the support base 7 (glass plate 3). Specifically, the holder 11 is disposed along the end portion 3aa of the side 3a out of the end portion 3aa of the side 3a and the end portion 3ba of the side 3b forming each corner portion of the four corner portions of the glass plate 3 indicated by the two-dot chain line in fig. 3. Here, the number of the holders 11 arranged on the one side surface 7a is not limited to two, and may be appropriately increased or decreased according to the injection pressure, injection position, and the like of the gas.

As a modification of the present embodiment, when the holder 11 is disposed on two parallel side surfaces 7a of the four side surfaces 7a of the support base 7, the holder 11 may be disposed along the end portion 3ba of the side 3b instead of the end portion 3aa of the side 3 a. When the holders 11 are disposed on all of the four side surfaces 7a, the holders 11 may be disposed along both the end portion 3aa of the side 3a and the end portion 3ba of the side 3 b.

As shown in fig. 4, the holder 11 has a pair of clamping portions 11a, 11b that clamp the end portion of the lowermost layer sheet 2x from the front and back surfaces, and the end portion of the lowermost layer sheet 2x can be clamped in a folded state by the pair of clamping portions 11a, 11 b.

The pair of clamping portions 11a, 11b are coupled to each other via a hinge 12. The clamping portion 11b disposed on the back side of the lowermost layer sheet 2x is fixed to the side surface 7a of the support base 7. On the other hand, the grip portion 11a disposed on the front side of the lowermost layer sheet 2x is rotatable about the shaft 12a of the hinge 12 as shown by arrow a-a in fig. 4.

When the nip portion 11a moves to a position indicated by a solid line in fig. 4 (hereinafter, referred to as a nip position) in accordance with the rotation, the pair of nip portions 11a and 11b cooperate to nip the end portion of the lowermost layer sheet 2 x. In the present embodiment, the end portion of the lowermost layer sheet 2x is sandwiched by the magnetic force of the magnets (magnet pieces), which will be described in detail later. On the other hand, when the clamping portion 11a is separated from the clamping position in accordance with the rotation, the clamping of the end portion of the lowermost layer sheet 2x is released. The clamping portion 11a in the clamping-released state can be on standby at a position indicated by a two-dot chain line in fig. 4 (hereinafter referred to as a standby position), for example. The standby position is separated from the holding position by a distance sufficient for the holding portion 11a not to move by the magnetic force of the magnet.

The clamping portion 11b includes a side plate 13 directly fixed to the side surface 7a of the support base 7, a bottom plate 14 extending horizontally and connected to a lower end portion of the side plate 13, a resin material 15 attached along the side plate 13 and the bottom plate 14, and a magnet piece 16 attached to the side plate 13 above the resin material 15.

The side plates 13 and the bottom plate 14 are made of metal such as stainless steel or aluminum alloy. A shaft 12a extending parallel to the side surface 7a of the support table 7 is provided at one end of the bottom plate 14. The material of the resin material 15 is not particularly limited, but in the present embodiment, ultra-high molecular weight polyethylene (UHMWPE) is used. The resin material 15 is formed so that the thickness thereof gradually increases toward the side surface 7a of the support base 7, and the contact portion 15a of the resin material 15 with the end of the lowermost sheet 2x is inclined with respect to the horizontal plane. The magnet fragments 16 are disposed so as to face magnet fragments 17 of the sandwiching portion 11a, which will be described later.

The clamping portion 11a includes a rotating plate 18 rotatable about a shaft 12a provided in the hinge 12, a resin material 19 attached along the rotating plate 18, and a magnet piece 17 capable of being pulled up to the magnet piece 16 by magnetic force in a state of being fixed to the resin material 19.

The rotating plate 18 is made of metal such as stainless steel or aluminum alloy, for example, as in the case of the side plate 13 and the bottom plate 14 described above. The material of the resin material 19 is not particularly limited, but in the present embodiment, as in the resin material 15 described above, ultra-high molecular weight polyethylene (UHMWPE) is used. The contact portion 19a of the resin material 19 with the end portion of the lowermost sheet 2x is inclined with respect to the horizontal plane in conformity with the contact portion 15a of the resin material 15 described above. A recessed portion 19b is formed at the upper end of the resin material 19. Thus, for example, by hooking a finger or the like of a person on the recessed portion 19b, a force for separating the magnet piece 17 from the magnet piece 16 against the magnetic force can be easily applied.

The end of the lowermost layer sheet 2x is sandwiched in a state in which the displacement thereof with respect to the pair of sandwiching portions 11a, 11b is allowed. That is, the end of the lowermost layer sheet 2x is sandwiched by a force of such a degree that it can slide in an arbitrary direction with respect to the pair of sandwiching portions 11a and 11b by an external force applied to itself (for example, an external force applied in accordance with vibration at the time of conveyance of the glass plate package 1). This can prevent the lowermost layer sheet 2x from being broken and damaged. The magnitude of the force with which the pair of sandwiching portions 11a, 11b sandwich the end portion of the lowermost layer sheet 2x can be adjusted by changing the thickness of the magnet pieces 16, 17, for example, and changing the magnitude of the magnetic force. Further, the magnitude of the sandwiching force may be adjusted by providing unevenness on the interface between the resin material 19 and the magnet piece 17, and adjusting the contact area of the magnet piece 17 deformed in conformity with the unevenness and the end of the lowermost layer piece 2 x. Further, the magnitude of the force with which the lowermost sheet 2x starts sliding may be adjusted by changing the material of the two resin members 15 and 19 to change the friction coefficient.

Here, as a modification of the present embodiment, a magnet may be embedded in the side surface 7a of the support base 7, and the end of the lowermost layer sheet 2x may be sandwiched between the embedded magnet and another magnet.

Hereinafter, the main operation and effect of the glass plate package 1 will be described.

In the glass plate package 1 described above, even in a state where the glass plates 3 are taken out from the laminate 4 at the time of opening (a state where the regulating plate 10 and the like are removed), the lowermost layer sheet 2x is fixed to the support base 7. Therefore, even when the assistance of the extraction by the ejection of the gas is performed when the glass plate 3 is extracted from the laminate 4 at the time of opening, the lowermost layer sheet 2x can be prevented from being lifted from the support base 7 by the gas. Therefore, even when the number of glass plates 3 constituting the laminated body 4 is reduced as the taking-out proceeds, the glass plates 3 can be prevented from floating from the support base 7, and the positional displacement of the glass plates 3 with respect to the support base 7 can be prevented. As a result, the occurrence of defective removal of the glass plate 3 can be avoided.

Hereinafter, a glass plate package according to another embodiment of the present invention will be described. In the description of the other embodiments, the same reference numerals are given to the elements already described in the above-described first embodiment and substantially the same elements, so that the overlapping description is omitted, and only the differences from the first embodiment will be described.

< second embodiment >

As shown in fig. 5, in the second embodiment, the holder 11 includes a pressing member 20 that presses the end portion of the lowermost layer sheet 2x from the front side, a base portion 22 connected to the pressing member 20 via a spring 21, and an arm portion 23 extending horizontally from the lower end of the base portion 22.

The pressing member 20 has a lower end connected to the tip of the arm 23 and is rotatable about the tip of the arm 23 as shown by an arrow B-B in fig. 5. On the other hand, the base portion 22 is fixed to the side surface 7a of the support base 7. One end of the spring 21 is fixed to the intermediate portion of the pressing member 20, and the other end of the spring 21 is fixed in a state of being enclosed in the base portion 22. The spring 21 is always in an extended state from the natural length regardless of the position of the pressing member 20. Thus, the pressing member 20 is rotated by the moment generated by the restoring force of the spring 21, guided to the side surface 7a side of the support base 7, and sandwiches the end portion of the lowermost layer sheet 2x in cooperation with the side surface 7a of the support base 7. The magnitude of the sandwiching force can be adjusted by changing the spring constant of the spring 21, for example. When the end portion of the lowermost sheet 2x is released from being sandwiched, the pressing member 20 is separated from the side surface 7a of the support base 7 against the restoring force of the spring 21 while a finger or the like of a person is hooked on the grip portion 20a formed on the pressing member 20.

< third embodiment >

As shown in fig. 6, in the third embodiment, the holder 11 is constituted by an elastic spring 24.

The lower end 24a of the elastic spring 24 is fixed to the side surface 7a of the support base 7. On the other hand, as shown by arrows C-C in fig. 6, the upper end portion 24b of the elastic spring 24 can be separated from the side surface 7a of the support base 7 by, for example, manual force, and can sandwich the end portion of the lowermost layer sheet 2x in cooperation with the side surface 7a of the support base 7 by the restoring force of the elastic spring 24. The magnitude of the sandwiching force can be adjusted by changing the spring constant of the elastic spring 24, for example.

< fourth embodiment >

As shown in fig. 7, in the fourth embodiment, the holder 11 is constituted by a clip 25 attached to the side surface 7a of the support base 7. The end of the lowermost sheet 2x can be sandwiched between the pressing portion 25a of the clip 25 and the side surface 7a of the support base 7. The magnitude of the sandwiching force can be adjusted by changing a spring constant of a spring (not shown) incorporated in the clip 25, for example.

< fifth embodiment >

As shown in fig. 8, in the fifth embodiment, instead of the holder 11, the end portion of the lowermost layer sheet 2x is fixed to the side surface 7a of the support base 7 by the adhesive tape 26. The adhesive tape 26 is adhered so as to straddle both the end of the lowermost layer sheet 2x and the side surface 7a of the support base 7. The number of the adhesive tape 26 to be used may be increased or decreased as appropriate. Instead of the adhesive tape 26, a magnet sheet may be used. In this case, the side surface 7a of the support base 7 is made of a ferromagnetic material such as iron, cobalt, nickel, or the like.

< sixth embodiment >

As shown in fig. 9, the sixth embodiment is different from the first embodiment in that a recessed portion 19b is removed from a resin material 19 provided in a holder 11, and a protrusion 18a for hooking a finger or the like of a person is formed on a rotating plate 18 instead of the recessed portion 19 b. In fig. 9, the lowermost layer sheet 2x is not shown.

The rotating plate 18 is formed longer than the resin material 19 in the direction in which the shaft 12a extends, and a portion of the rotating plate 18 that protrudes from the resin material 19 to one side and a portion that protrudes to the other side each constitute a protruding portion 18 a. By applying a force to the protruding portion 18a, the magnet piece 17 can be separated from the magnet piece 16 against the magnetic force.

According to the present embodiment, by removing the recessed portion 19b from the resin material 19, the risk of dust or the like accumulating on the resin material 19 can be reduced.

< seventh embodiment >

As shown in fig. 10 and 11, the seventh embodiment differs from the first embodiment described above in that the holder 11 is divided into two pieces by removing the two resin members 15 and 19, removing the bottom plate 14 and connecting the side plate 13 and the hinge 12, dividing the magnet pieces 16 and 17 into two pieces, and newly providing the round bars 27 and 28 and the grip portion 18 b. In fig. 11, only the holder 11 is illustrated.

The side plate 13 is attached with round bars 27 extending in parallel with the shaft 12a at upper and lower stages. The magnet fragments 16 are arranged above and below the two round bars 27, respectively. In the rotary plate 18, a round bar 28 extending parallel to the shaft 12a is attached at a height position corresponding to the distance between the two round bars 27. The magnet fragments 17 are arranged above and below the round bar 28. The handle portion 18b is formed at the upper end portion of the rotating plate 18, and can apply a force for separating the magnet piece 17 from the magnet piece 16 against the magnetic force by hooking a finger of a person or the like.

In the present embodiment, by removing both the resin members 15 and 19 and the bottom plate 14, the thickness of the holder 11 (the thickness in the direction perpendicular to the side surface 7a of the support base 7) is thinner as compared with the first embodiment. In the present embodiment, the end of the lowermost sheet 2x is sandwiched between the pair of sandwiching portions 11a and 11b in a state of being bent into a wave shape by the two round bars 27 and 28.

< eighth embodiment >

As shown in fig. 12, in the eighth embodiment, the holding portion 11b of the holder 11 of the first embodiment is removed, and the end portion of the lowermost layer piece 2x is sandwiched between the magnetic piece 17 provided in the holding portion 11a and the side surface 7a of the support base 7 made of a ferromagnetic material.

The side surface 7a of the support base 7 is made of iron, cobalt, nickel, or the like, for example. A handle portion 18b is formed at the upper end portion of the rotating plate 18 to which the magnet piece 17 is attached. The grip portion 18b has the same function as the grip portion 18b of the seventh embodiment described above.

< ninth embodiment >

As shown in fig. 13, the ninth embodiment differs from the first embodiment described above in that the extension portions 2a of the protective sheet 2 are lengthened and the holder 11 functions as a support portion that collects and supports the extension portions 2a of the protective sheets 2 (except for the lowermost sheet 2x) from below.

When the plurality of projecting portions 2a superposed on the holder 11 are collected and supported, the upper end portion of the holder 11 supports the lower surface of the lowermost projecting portion 2 a. The support by the holder 11 prevents the downward bending of the projecting portions 2 a. The upper end of the holder 11 is located below the upper surface 7b of the support table 7, and a height difference is provided between the upper end and the lower end. Thus, the extension portion 2a is bent downward to such an extent that it is not bent, and the end portion of the glass plate 3 is covered laterally by the extension portion 2a, thereby protecting the glass plate 3 from being damaged or injured. Further, by providing the height difference, even if the glass plate 3 is displaced laterally, the holder 11 is prevented from colliding with the lowermost glass plate 3 (colliding with the lowermost layer sheet 2x interposed therebetween).

Here, in order to reliably support the protruding portion 2a by the holder 11, the thickness of the holder 11 (the thickness in the direction perpendicular to the side surface 7a of the support base 7) is preferably 10 to 30mm, for example. The height difference between the upper end of the holder 11 and the upper surface 7b of the support base 7 can be set to 10 to 20mm, for example.

As a modification of the present embodiment, the support portion may be formed by a member different from the holder 11. For example, a rectangular parallelepiped case or a plate having an upper surface perpendicular to the side surface 7a may be disposed as the support portion at a portion of the side surface 7a of the support base 7 where the holder 11 and the regulating plate 10 are not disposed. The area of the upper surface 7b of the support base 7 may be larger than the area of the glass plate 3, and the region of the upper surface 7b protruding from the end of the glass plate 3 may be used as a support portion.

The second to ninth embodiments described above also provide the same main operation and effects as those of the first embodiment described above.

Here, as in the fifth embodiment, when the end portion of the lowermost layer sheet 2x is fixed to the side surface 7a of the support base 7 by the adhesive tape 26, the adhesive tape 26 does not allow the end portion of the lowermost layer sheet 2x to shift. Therefore, the lowermost layer sheet 2x is likely to be broken and damaged by the external force applied in accordance with the vibration during the conveyance of the glass plate package 1. When the lowermost layer sheet 2x is broken and damaged, the glass plate 3 loaded on the tray 5 needs to be taken out and cleaned, and then loaded on the tray 5 again, which lowers the manufacturing efficiency. In order to prevent this, it is preferable that the holder 11 holds the lowermost layer sheet 2x in a state allowing the displacement by sandwiching the end portion thereof as in the first to fourth and sixth to ninth embodiments, and it is more preferable that the end portion of the lowermost layer sheet 2x is sandwiched and held by the magnetic force of the magnet as in the first and sixth to ninth embodiments.

In the first to ninth embodiments, the projecting portions 2a projecting from the end portions of the glass plate 3 are formed at the end portions of all the four sides of the rectangular protective sheet 2, but the projecting portions 2a may be formed only at the end portions of the sides fixed to the support base 7. From the viewpoint of protecting the end portions of the glass plate 3, it is preferable that the extension portions 2a be formed on all the four side end portions of the protective sheet 2. From the viewpoint of accurately covering the end portion of the glass plate 3 with the extension portion 2a, the extension length of the extension portion 2a (the length from the end portion of the glass plate 3 to the tip end of the extension portion 2 a) is preferably 10mm or more. In addition, the extension length of the extension portion 2a is preferably 30mm or more from the viewpoint of reliably holding the extension portion 2a by the holder 11. From the viewpoint of cost reduction, the upper limit of the extension length of the extension portion 2a is preferably 80mm or less, more preferably 60mm or less, and most preferably 40mm or less.

Description of the reference numerals

1 glass plate package body

2 protective sheet

2a extension

2x protective sheet of the lowermost layer

3 glass plate

3a side

3aa edge end

3b side

End of 3ba side

4 laminated body

5 tray

7 supporting table

7a side surface of the supporting table

7b upper surface of the supporting table

11 holder

11a clamping part

11b clamping part

12 hinge

15 resin member

15a contact part

16 magnet sheet

17 magnet sheet

19 resin member

19a contact part

26 bonding the tape.