CN112888640B

CN112888640B - Glass plate package body

Info

Publication number: CN112888640B
Application number: CN201980070326.2A
Authority: CN
Inventors: 内田势津夫; 安田广; 西川佳范; 张凯; 李明浩; 崔洪国
Original assignee: Electric Glass Guangzhou Co ltd; Nippon Electric Glass Co Ltd
Current assignee: Electric Glass Guangzhou Co ltd; Nippon Electric Glass Co Ltd
Priority date: 2018-11-02
Filing date: 2019-10-17
Publication date: 2022-12-23
Anticipated expiration: 2039-10-17
Also published as: JP7292303B2; TW202100424A; KR20210084429A; JPWO2020090501A1; WO2020090501A1; CN112888640A; TWI816925B

Abstract

A glass plate package body (1) is provided with a laminated body (4) formed by laminating rectangular glass plates (3) and protective plates (2) with extension parts (2 a) extending from the end parts of the glass plates (3) in a flat posture, and a tray (5) loaded with the laminated body (4), wherein the tray (5) is provided with a holding piece (11) having a function of supporting the extension parts (2 a) of a plurality of protective plates (2) contained in the laminated body (4) from the lower part, and the holding piece (11) is arranged at least along the corner part of the lowermost glass plate (3) contained in the laminated body (4).

Description

Glass plate package body

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 a Flat Panel Display (FPD) typified by a liquid crystal display, a plasma display, an organic EL display, or the like. 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 packaging of glass plates as described above. In this package, rectangular glass plates and protective sheets are alternately stacked in a flat posture 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. The protective sheet has a protruding portion protruding from an end of the glass sheet. According to this packaging method, the weight of the glass sheet is mainly supported by the main surface of the glass sheet, and the end portion of the glass sheet can be covered with the protruding portion, so that there is an advantage that the end portion of the glass sheet having a weak strength can be appropriately protected.

Documents of the prior art

Patent literature

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 body is opened and the glass plates are taken out from the laminate, for example, a taking-out method as shown in fig. 11 and 12 may be employed.

In this embodiment, a robot 300 for sucking and taking out the uppermost glass plate 200 from the laminated body 100 as shown in fig. 11 and a rod-shaped robot 500 for sucking and taking out the uppermost protective sheet 400 from the laminated body 100 as shown in fig. 12 are alternately operated. In this way, the glass plate 200 and the protective sheet 400 are alternately taken out of the laminate 100. The stacked body 100 is mounted on the tray 600 while being supported from below by the base 600 a.

When both the

robots

300 and 500 are operated, the robot is used to assist in easily taking out the glass plate 200 and the protective sheet 400.

As shown in fig. 11, when the robot 300 is operated, the pressing member 700 presses the protruding portion 400a of the protective sheet 400 protruding from the end of the glass plate 200 constituting the laminate 100. This prevents the protective sheet 400 attached directly below the uppermost glass plate 200 sucked by the robot 300 from being removed together with the glass plate. On the other hand, as shown in fig. 12, 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 method is adopted at the time of opening the glass plate package body, the following problems to be solved arise.

When the protective sheet 400 has the extension portion 400a, as shown in fig. 13, the extension portion 400a of the protective sheet 400 disposed on the lower layer is bent downward. The bending of the extension portion 400a causes the following problems. That is, when the protective sheet 400 located in the vicinity of the lowermost layer before being opened is taken out by the robot 500, the bent extending portion 400a of the protective sheet 400 to be taken out may be caught by a corner portion of the protective sheet 400 or the glass plate 200 which is not to be taken out. In addition, as shown in fig. 13, as the position of the protective sheet 400 becomes lower, the radius of curvature of the bent portion becomes smaller. Therefore, the hooking described above is more likely to occur as the position of the protective sheet 400 becomes lower. As a result, the protective sheet 400 slips and slips with respect to the robot 500, and the protective sheet 400 may be taken out improperly. When a removal failure occurs, the operation for opening needs to be interrupted for a long time (for example, about 0.5 time), and the production efficiency of the product is significantly deteriorated.

The present invention has been made in view of the above circumstances, and an object thereof is to establish a technique that can avoid the occurrence of defective removal of a protective sheet due to bending of a protruding portion when a glass plate package is opened and a glass plate and the protective sheet are removed from a laminate.

Means for solving the problems

The present invention for achieving the above object is a glass plate package body including: a laminate body formed by laminating a rectangular glass plate and a protective sheet having an extension portion extending from an end of the glass plate in a flat posture; and a tray on which the laminated body is mounted, wherein the tray includes a support portion that supports, from below, protruding portions of a plurality of protective sheets included in the laminated body, and the support portion is disposed along at least a corner portion of a lowermost glass sheet included in the laminated body.

In the present configuration, the plurality of protective sheets included in the laminate are supported from below by the support portions at the protruding portions of the protective sheets that protrude from the corner portions of the glass sheets, respectively, so that the protruding portions are prevented from bending downward. That is, bending of the protruding portion at the periphery of the corner portion of the glass sheet is avoided. Thus, even when the protective sheet located in the vicinity of the lowermost layer before the opening of the glass sheet package is taken out by a robot or the like, the projecting portion is prevented from being bent, and the projecting portion of the protective sheet to be taken out is prevented from being caught at the corner portion of the protective sheet or glass sheet which is not the object to be taken out. As a result, the occurrence of defective removal of the protective sheet can be avoided.

In the above configuration, it is preferable that the support portion is disposed along at least an end portion of the lowermost glass sheet where the projecting length of the projecting portion is long, of one end portion and the other end portion forming the corner portion.

In this way, in each protective sheet, the extended portion having a relatively long extended length, which is in a relatively easily bendable state, of the extended portion extending from the end portion on one side where the corner portion of the glass plate included in the laminate is formed and the extended portion extending from the end portion on the other side is reliably supported by the support portion. This can effectively prevent the protruding portion from being bent around the corner of the glass plate.

In the above-described configuration, the support portion is preferably disposed along only one of an end portion of one side of the lowermost glass plate where the corner portion is formed and an end portion of the other side.

In this way, since the support portions are arranged along only one end portion, complication of the tray structure due to an increase in the number of support portions can be prevented. Further, by suppressing the number of the support portions, it is possible to eliminate the risk of dust or the like accumulating on the support portions as much as possible. Even if the support portion is disposed along only one end portion, the projecting portion can be reliably prevented from being bent around the corner portion as described below. First, the protruding portion protruding from one end portion is supported by the support portion, thereby preventing the protruding portion from bending downward. In addition, as the extension portion extending from one end portion is prevented from being bent, the extension portion extending from the remaining one end portion connected to the extension portion is also naturally prevented from being bent downward. In this way, bending of the protruding portion at the periphery of the corner portion is avoided.

In the above configuration, it is preferable that the tray has a base portion for supporting the stacked body from below, and an upper end portion of the support portion is located below an upper surface of the base portion for supporting the stacked body.

In this way, the protruding portion can be bent downward to such an extent that it does not bend, and the end portion of the glass plate can be covered with the bent protruding portion. This can appropriately protect the glass plate from damage or damage originating from the end portion. Further, since there is a level difference between the upper end portion of the support portion and the upper surface of the pedestal portion, even when the glass plates included in the laminate are displaced laterally (horizontally moved) by vibration or the like, it is possible to avoid collision between the support portion and the glass plates.

In the above-described configuration, it is preferable that the support portion is disposed only along a corner portion of the lowermost glass plate, the tray includes a regulating member that regulates movement of the plurality of glass plates included in the stacked body in the horizontal direction, and the regulating member is disposed so as to be positioned between adjacent corner portions of the respective glass plates included in the stacked body.

In this way, since the regulating member is disposed at a position where the supporting portion is not present, it is possible to effectively achieve both avoidance of bending of the protruding portion at the periphery of the corner portion of the glass plate and regulation of movement of the glass plate in the horizontal direction.

Effects of the invention

According to the present invention, when the glass plate package is opened and the glass plate and the protective sheet are taken out from the laminate, it is possible to avoid the occurrence of defective taking-out of the protective sheet due to bending of the protruding portion.

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 body according to the first embodiment.

Fig. 4 is an enlarged cross-sectional view of the periphery of the side surface of the seat portion of the glass plate package of the first embodiment.

Fig. 5 is a plan view showing a glass plate and a protective sheet included in a laminate provided in the glass plate package according to the first embodiment.

Fig. 6 is a plan view showing a modification of the tray provided in the glass plate package body according to the first embodiment.

Fig. 7 is a plan view showing another modification of the tray provided in the glass plate package of the first embodiment.

Fig. 8 is an enlarged cross-sectional view of the periphery of the side surface of the seat portion of the glass plate package of the second embodiment.

Fig. 9 is an enlarged cross-sectional view of the periphery of the side surface of the base portion of the glass plate package of the third embodiment.

Fig. 10 is a plan view showing a modification of the tray provided in the glass plate package body according to the third embodiment.

Fig. 11 is a front view for explaining a problem of the related art.

Fig. 12 is a front view for explaining a problem of the related art.

Fig. 13 is an enlarged cross-sectional view of a Z portion surrounded by a circle in fig. 12 for explaining a problem of the conventional 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 2 x) 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 portion of the protective sheet 2 protrudes from the end portion of the glass plate 3 (see fig. 4 and 5). The end of the protective sheet 2 protruding from the end of the glass plate 3 constitutes an protruding portion 2a.

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

The thickness of the protective sheet 2 constituting the laminate 4 is preferably 0.05mm to 0.2mm, and more preferably 0.05mm to 0.1mm. 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 G5 (1100 mm to 1300 mm) or more, more preferably G8.5 (2200 mm to 2500 mm) 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 part 6 mounted on a floor of a plant, a container of a transport vehicle, and the like; and a base 7 which is disposed on the base 6 and supports the laminated body 4 from below. The lowermost layer sheet 2x is fixed to the pedestal portion 7, which will be described in detail later. Both the base portion 6 and the base portion 7 are integrated by means of welding or the like, for example. In the present embodiment, both the base portion 6 and the base portion 7 have a rectangular shape in a plan view (see fig. 3), and the base portion 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 pedestal portion 7 have substantially the same area. In the present embodiment, the pedestal portion 7 is stacked on the pedestal portion 6, but the present invention is not limited to this. The base portion 7 may be eliminated and the base portion 6 may have a function as a base portion.

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.

Restriction plates 10 as restriction members for restricting lateral displacement (horizontal movement) of the plurality of glass plates 3 included in the laminated body 4 are attached to the four side surfaces 7a of the base portion 7. 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 7a. The lower end of each limiting plate 10 is fixed to the side surface 7a of the pedestal portion 7 by a stopper (e.g., a bolt). The regulating plate 10 is removed when the glass plate package body 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 base portion 7 by fixing the pressing plate to the base portion 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 pedestal portion 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 pedestal portion 7 that supports the laminated body 4, and the side surfaces of the base 7x and the cushion plate 7y constitute a side surface 7a of the pedestal portion 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 pedestal portion 7, which will be described later, are attached to the base 7x.

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, the holders 11 are disposed on two parallel side surfaces 7a of the four side surfaces 7a of the pedestal portion 7. As shown in fig. 4, the holder 11 has, as a first function, a function of a fixing portion for fixing the lowermost layer sheet 2x to the pedestal portion 7 by sandwiching and holding the lowermost layer sheet 2x (not shown in the figure). The second function is a function of supporting the protruding portions 2a of the plurality of protective sheets 2 (except for the lowermost sheet 2 x) included in the multilayer body 4 from below. With this second function, the extension portion 2a at the periphery of the corner of the glass plate 3 is prevented from being bent downward.

The arrangement of the holder 11 will be described in detail below.

As shown in fig. 3, the holders 11 are positioned outside the four corner portions of the lowermost glass sheet 3 (indicated by the two-dot chain lines in the figure) included in the laminate 4 and arranged along the corner portions in order to exhibit the second function (function as support portions) described above. Each corner portion is formed by an end portion 3aa of the side 3a and an end portion 3ba of the side 3b of the glass plate 3. In the present embodiment, the holder 11 is disposed along only the end portion 3aa of the two end portions 3aa, 3 ba. The limiting plates 10 (indicated by two-dot chain lines in the figure) are disposed so as to be positioned between adjacent corner portions of the glass plate 3.

Here, fig. 5 shows the relationship between the glass plate 3 and the protective sheet 2 included in the laminated body 4. As shown in the drawing, in the present embodiment, the projecting length X of the projecting portion 2a of the protective sheet 2 is longer when the projecting length X projecting from the side 3a is compared with the projecting length Y projecting from the side 3 b. Therefore, when the protruding length is compared between both the end portions 3aa, 3ba, the protruding length (equal to the protruding length X) protruding from the end portion 3aa is longer. The holder 11 is disposed only along the end portion 3aa having the longer extension length. This arrangement is the first object because the longer the projection length is, the easier the bending is made, and therefore the bending is effectively avoided. Further, the second object is to avoid complication of the structure of the tray 5 by suppressing the number of the holders 11 as much as possible, and to eliminate the risk of accumulation of dust and the like on the holders 11 as much as possible.

In view of the above-described first and second objects, when the projecting length Y is longer than the projecting length X, as a modification of the present embodiment, as shown in fig. 6, the holder 11 is preferably disposed along only the end portion 3ba of the two end portions 3aa, 3 ba. In addition, when both the projecting length X and the projecting length Y are too long, as another modification of the present embodiment, as shown in fig. 7, the holder 11 may be disposed along both the end portions 3aa and 3 ba.

As shown in fig. 4, 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 in the thickness direction thereof in order to exhibit the first function (function as a fixing portion) described above. Thus, the end of the lowermost sheet 2x is fixed to the side surface 7a of the pedestal portion 7 by the holder 11.

The holder 11 has a pair of clamping

portions

11a and 11b that clamp the end of the lowermost layer sheet 2x from the front and back surfaces, and can clamp the end of the lowermost layer sheet 2x in a folded state by the pair of clamping

portions

11a and 11 b.

The pair of clamping

portions

11a, 11b are coupled to each other via a hinge 12. The clamp 11b disposed on the back side of the lowermost layer sheet 2x is fixed to the side surface 7a of the pedestal portion 7. On the other hand, the grip portion 11base:Sub>A disposed on the front side of the lowermost layer sheet 2x is rotatable about the shaft 12base:Sub>A provided in the hinge 12, as indicated by an arrowbase:Sub>A-base:Sub>A in fig. 4.

When the gripping portion 11a moves to a position indicated by a solid line in fig. 4 (hereinafter, referred to as a gripping position) with rotation, the pair of

gripping portions

11a and 11b cooperate to sandwich the end of the lowermost layer sheet 2 x. In the present embodiment, the end 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 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 pedestal portion 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 pedestal portion 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 pedestal portion 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 a 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 sheet 2x is sandwiched by a force of such an extent 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 association 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 at the time when the lowermost layer sheet 2x starts sliding may be adjusted by changing the material of the

resin members

15 and 19 to change the friction coefficient.

When the upper end portion of the holder 11 supports the plurality of projecting portions 2a superposed on the holder 11, the lower surface of the lowermost projecting portion 2a is supported. The projecting portions 2a project from the end portions of the glass plate 3 and are in a state of being deflected downward by their own weight. The upper end of the holder 11 is located below the upper surface 7b of the pedestal 7, and a vertical height difference is present between the upper end and the lower surface. Thereby, 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. This protects the glass plate 3 from damage and damage originating from the end of the glass plate 3. Further, due to the presence of the height difference, even when 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 projecting 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 pedestal portion 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.

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

In the glass plate package 1 described above, the plurality of protective sheets 2 included in the laminate 4 are supported from below by the protruding portions 2a protruding from the end portions 3aa of the edges 3a of the glass plates 3 being collected by the holder 11 functioning as a support portion, so that the protruding portions 2a are prevented from being bent downward. Thereby, bending of the protruding portion 2a at the periphery of the corner of the glass plate 3 is avoided. Therefore, even when the protective sheet 2 located in the vicinity of the lowermost layer before the glass sheet package 1 is opened is taken out by a robot or the like, the projecting portion 2a is prevented from being bent, and the projecting portion 2a of the protective sheet 2 to be taken out is prevented from catching on the corner portions of the protective sheet 2 and the glass sheet 3 which are not to be taken out. As a result, the occurrence of defective removal of the protective sheet 2 can be avoided.

Here, the occurrence rate of defective removal of the protective sheet 2 due to bending of the protruding portion 2a was verified for the glass plate package 1 of the first embodiment. The glass plate package 1 was prepared in 15 pieces, and some of them were checked for the occurrence of defective extraction. The extension lengths X, Y shown in fig. 5 are 40mm and 20mm, respectively. Further, the thickness of the holder 11 was 20mm. As a result of the verification, the glass plate package 1 with the occurrence of the defective extraction was 0 out of 15, and the defective extraction was not caused at all. On the other hand, for comparison, the same verification was performed with the holder 11 removed, and as a result, it was found that a removal failure occurred in 3 out of 15.

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 first embodiment and the substantially same elements in the description of the other embodiments, so that the overlapping description is omitted, and only the differences from the first embodiment will be described.

< second embodiment >

As shown in fig. 8, the second embodiment is different from the first embodiment described above in that the fixing of the lowermost layer sheet 2x to the pedestal portion 7 is released, and in that a cassette 20 is disposed instead of the holder 11. In the present embodiment, the cartridge 20 functions as a support portion.

The cartridge 20 has: a rectangular parallelepiped case main body 20a fixed to the side surface 7a of the pedestal portion 7; a box cover 20b for closing the opening 20aa of the box body 20 a; and a filler 20c filled in the cartridge main body 20 a. In the present embodiment, the plurality of protruding portions 2a are supported by the upper surface of the case main body 20a and the upper surface of the case cover 20b, and the protruding portions 2a are prevented from being bent downward. Instead of the cartridge 20, for example, a case or a block may be used. The case can be formed into a rectangular parallelepiped shape by joining a plurality of metal plates or resin plates, for example, and the block body can be formed of a rectangular parallelepiped metal block or resin block, for example.

< third embodiment >

As shown in fig. 9, the third embodiment is different from the first embodiment in that the fixing of the lowermost layer sheet 2x to the pedestal portion 7 is released and in that a support plate 21 is disposed instead of the holder 11. In the present embodiment, the support plate 21 functions as a support portion.

The support plate 21 has an L-shaped cross-sectional shape, and includes a fixed plate portion 21a fixed to the side surface 7a of the pedestal portion 7, and a horizontal plate portion 21b extending horizontally from an upper end of the fixed plate portion 21 a. In the present embodiment, the plurality of extension portions 2a are supported by the horizontal plate portion 21b, and the extension portions 2a are prevented from being bent downward. Here, as a modification of the present embodiment, as shown in fig. 10, the support plate 21 may be disposed along the curve of the corner portion of the glass plate 3.

In the second and third embodiments, the end portion of the lowermost layer sheet 2x is fixed to the pedestal portion 7 (the side surface 7a of the pedestal portion 7) by an adhesive tape or a magnet sheet. When the end portion of the lowermost layer sheet 2x is fixed to the pedestal portion 7 (the side surface 7a of the pedestal portion 7) by the magnet fragments, the side surface 7a of the support pedestal 7 is made of a ferromagnetic material such as iron, cobalt, or nickel.

The second and third embodiments described above also achieve the same main operation and effects as those of the first embodiment described above.

Here, the glass plate package of the present invention is not limited to the configurations described in the above embodiments. For example, the holder 11, the cassette 20, and the support plate 21 may be removed from the first to third embodiments, and instead, the area of the upper surface 7b of the pedestal portion 7 may be made 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 function as a support portion.

In the above-described embodiments, the holder 11, the cassette 20, and the support plate 21, which function as the support portions, are arranged only along the corners of the glass plate 3, but these members, which function as the support portions, may be arranged at positions other than the positions along the corners. For example, these members may be disposed so as to be located between adjacent limiting plates 10.

In the above-described embodiments, the projecting portions 2a projecting from the end portions of the glass plate 3 are formed on all of the four side end portions of the rectangular protective sheet 2, but the projecting portions 2a may be formed only on some of the side end portions. From the viewpoint of protecting the end portions of the glass plate 3, it is preferable that the projecting portions 2a be formed on all the four side end portions of the protective sheet 2. From the viewpoint of accurately covering the end portions of the glass plate 3 with the projecting portions 2a, the projecting length of the projecting portions 2a (the projecting length X, Y shown in fig. 5) 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

3. Glass plate

3a side

3aa edge end

3b side

End of 3ba side

4. Laminated body

5. Tray

7. Seat part

7b upper surface of the pedestal part

10. Limiting plate

11. Holding member (supporting part)

20. Box (bearing)

21. Support plate (support)

Length of extension of X

Y is extended.

Claims

1. A glass plate package body is provided with: a laminate body formed by laminating a rectangular-shaped glass plate and a protective sheet having an extension portion extending from an end portion of the glass plate in a flat posture; and a tray on which the stacked body is loaded,

the glass plate package body is characterized in that,

the tray includes a support portion for supporting the protruding portions of the plurality of protective sheets included in the stacked body from below,

the support portion is disposed at least along a corner portion of a lowermost glass sheet included in the laminate,

the tray has a pedestal portion for supporting the stacked body from below,

the upper end of the support portion is located below the upper surface of the pedestal portion that supports the stacked body.

2. The glass plate package of claim 1,

the support portion is disposed along at least an end portion of the protruding portion having a longer protruding length, of one end portion forming the corner portion and the other end portion of the lowermost glass sheet.

3. The glass plate package according to claim 1 or 2,

the support portion is disposed along only one of an end portion of one side and an end portion of the other side of the lowermost glass sheet forming the corner portion.

4. The glass plate package according to claim 1 or 2,

the support portion is disposed only along the corner portion of the lowermost glass sheet,

the tray includes a regulating member for regulating the horizontal movement of the plurality of glass plates included in the laminate,

the regulating member is disposed so as to be positioned between adjacent corner portions of the glass plates included in the laminate.