WO2011136108A1

WO2011136108A1 - Glass plate package body and method for packaging glass plate stack

Info

Publication number: WO2011136108A1
Application number: PCT/JP2011/059752
Authority: WO
Inventors: 裕児布施
Original assignee: 旭硝子株式会社
Priority date: 2010-04-28
Filing date: 2011-04-20
Publication date: 2011-11-03
Also published as: JP5489088B2; KR20130069601A; TWI436931B; JPWO2011136108A1; CN102858654A; KR101423413B1; CN102858654B; TW201136809A

Abstract

Disclosed is a glass plate package body wherein a glass plate stack formed by stacking a plurality of glass plates with a sheet between the plates is packed by a package container, and wherein the glass plate has a thickness of 0.7 mm or less, the glass plates are vertically stacked to be tilted relative to the vertical direction to form the glass plate stack, and the deviation in the thickness of the glass plate stack is 10% or less.

Description

Glass plate package and method for packing glass plate laminate

The present invention relates to a glass plate package for stacking and packing ultrathin FPD (Flat Panel Display) glass substrates such as a liquid crystal display glass substrate and a method for packing the glass plate laminate.

Glass substrates for FPD such as glass substrates for liquid crystal displays and glass substrates for plasma displays are prone to product defects due to surface fouling and contamination during storage and transportation. In particular, when used as a glass substrate that incorporates an electrical circuit on its surface, such as a non-alkali glass substrate used for liquid crystal displays, disconnection and patterning defects may occur even if there is slight wrinkles or contamination on the surface. To do. Therefore, such a glass substrate is required to have extremely high surface characteristics.

Therefore, as a method of preventing such wrinkles and contamination during storage and transport of the glass substrate, to separate the surfaces of the adjacent glass substrates by interposing paper between the glass substrate and the glass substrate to be laminated, A glass plate laminate having a so-called interleaving paper is disclosed in Patent Document 1.

Also, the slip sheet has a function as a cushioning material for preventing the glass substrate from being broken or chipped during storage or transportation of the glass substrate.

Patent Documents

2 and 3 disclose slip sheets that prevent such cracks and chips.

Patent Document 2 discloses a slip sheet having a thickness of 30 to 400 μm and a density of 0.70 g / cm ³ or less. Patent Document 1 describes that the thickness of the slip sheet is preferably 60 to 150 μm, and the density is preferably 0.5 g / cm ³ or less. Furthermore, Patent Document 2 exemplifies a glass plate having a size of 680 mm × 880 mm × 0.7 mm as a glass plate to which the slip sheet is applied. That is, a glass plate laminate is described in which a slip sheet is applied to a 0.7 mm thick glass plate.

On the other hand, Patent Document 3 discloses a slip sheet having a thickness of 40 to 400 μm and a density of 0.5 to 1 g / cm ³ or less. Further, in Patent Document 3, the thickness of the slip sheet is more preferably 50 to 250 μm, more preferably in the range of 60 to 95 μm, and the density is 0.6 to 0.9 g / cm ^3. Preferred is described.

Japanese Unexamined Patent Publication No. 2008-143542 Japanese Unexamined Patent Publication No. 2006-44674 Japanese Unexamined Patent Publication No. 2008-296938

Recent glass substrates for liquid crystal displays are manufactured with a thickness of 0.7 mm or less, but a glass substrate having a size of 1800 mm × 1500 mm or more is packed with the interleaving papers of

Patent Documents

2 and 3. In such a case, there has been a problem that the effects as described in

Patent Documents

2 and 3 cannot be obtained with respect to prevention of cracks during storage or transportation of the glass substrate.

That is, the interleaving papers of

Patent Documents

2 and 3 are effective as interleaving paper for a glass substrate having a size of less than 1800 mm × 1500 mm, but the glass substrate having a size of 1800 mm × 1500 mm or more, in particular, a thickness of 0.3 mm or less. In the case of interleaving paper, it was not possible to obtain a sufficient effect on cracking and chipping simply by defining the thickness and density of the interleaving paper, which are requirements for the cushioning material.

This invention is made | formed in view of such a situation, and provides the packaging method of the glass plate package which can reduce the cracking chip of a glass plate whose thickness is 0.7 mm or less, and a glass plate laminated body. For the purpose.

In order to achieve the above object, the present invention provides a glass plate package in which a glass plate laminate in which a plurality of glass plates are laminated via a sheet is packed in a packing container, and the thickness of the glass plate is 0.7 mm or less, and the glass plate laminate is a vertically stacked glass plate laminate in which the glass plates are laminated while being tilted with respect to the vertical direction, and the thickness deviation of the glass plate laminate is A glass plate package that is 10% or less is provided.

In order to achieve the above object, the present invention provides a glass plate package in which a glass plate laminate in which a plurality of glass plates are laminated via a sheet is packed in a packing container, and the thickness of the glass plate is The glass plate laminate is a flat glass plate laminate in which the glass plates are horizontally laminated, and the glass plate laminate has a thickness deviation of 3% or less. A board package is provided.

According to the present invention, as a sheet for a glass plate having a thickness of 0.7 mm or less, not only the sheet thickness and density, which are buffer requirements, are specified, but also when the glass plates are stacked vertically, It is specified that the sheet has a thickness deviation of 10% or less.

The deviation of the thickness was obtained by measuring the thickness of the glass plate laminate at several peripheral portions of the glass plate laminate, obtaining the maximum value, subtracting the ideal thickness from the maximum value, and subtracting it. This is a value obtained by dividing the thickness by the ideal thickness. The ideal thickness is the sum of the value obtained by multiplying the manufacturer's official value for the thickness of the glass plate by the number of laminated glass plates and the value obtained by multiplying the manufacturer's official value for the sheet thickness by the number of laminated sheets. is there. The large deviation in thickness means that wrinkles are generated in the sheets of the glass plate laminate or that the intervals between adjacent glass plates are separated. In particular, in the case of a vertically stacked glass plate package, since the glass plate is leaned diagonally, the lower side portion of the glass plate tends to open with respect to the lower side portion of the adjacent glass plate. Therefore, in the case of a vertically stacked glass plate package, the thickness deviation of the glass plate laminate is inevitably increased as compared with a flat stacked glass plate package.

In a glass plate having a thickness of 0.7 mm or less, particularly a glass plate having a thickness of 0.3 mm or less, if the deviation of the thickness is large, cracks and cracks are remarkably generated in the glass plate during storage or transportation. This was confirmed by experiments, and it was found by experiments that the cracks were greatly reduced by defining the thickness deviation of the glass plate laminate to 10% or less. In addition, a measurement point is a peripheral part of the glass plate laminated body which a crack crack tends to generate | occur | produce. That is, even if the thickness deviation exceeds 10% in the central portion of the glass plate laminate, there is no problem because the central portion of the glass plate laminate is pressed by the pressing member during conveyance.

On the other hand, when loading a glass plate into a packaging container, the lateral displacement of the glass plate is small, but if the loading operation is interrupted for some reason and then loaded again, depending on the positioning accuracy of the packaging container, the horizontal direction In some cases, a few millimeters will deviate.
In this case, since the relative position shifts with respect to the plurality of glass plates before and after the work interruption, the degree of influence on the crack is small. However, when the deviation of the thickness of the glass plate laminate is large, one or two glass plates may be displaced laterally. This is due to the operation of dropping the glass plate onto the bottom plate of the glass plate package in the loading operation of the glass plate by the robot, and the displacement of the glass plate in the lateral direction is also 10 mm or less, preferably 4 mm or less, more preferably 1 mm. It is desirable to manage the following.
The displacement of the glass plate in the horizontal direction can be easily measured using a ruler or the like by determining the right side and left side of the glass plate package. If there is some structure and measurement is not possible, it can be measured using a mirror.

According to the present invention, the thickness of the sheet is preferably 50 to 100 μm, and the density is preferably 0.80 g / cm ³ or less.

The thickness of the sheet is preferably 50 to 100 μm because it functions as a cushioning material. That is, if the thickness is less than 50 μm, it may not function as a buffer material because it is thin. On the other hand, when the thickness exceeds 100 μm, the sheet becomes so thick that wrinkles are easily generated, and it becomes difficult to suppress the above-described thickness deviation to 10% or less. The sheet thickness is more preferably 70 to 80 μm.

Further, since the sheet functions as a buffer material, the density is preferably 0.80 g / cm ³ or less. If the density exceeds 0.80 g / cm ³ , the sheet may be too hard and may not function as a buffer material for a glass plate having a thickness of 0.3 mm or less.

Further, according to the present invention, in the case of a vertically stacked glass plate laminate in which the weight of the glass plate does not contribute to a reduction in thickness deviation of the glass plate laminate, the thickness deviation is defined as 10% or less. In the case of a flat glass plate laminate in which the weight of the glass plate contributes to a reduction in the thickness deviation of the glass plate laminate, the thickness deviation is defined as 3% or less.

Further, the present invention is particularly effective for a glass plate having a size of 1800 mm × 1500 mm or more.

The present invention is particularly effective for a glass plate having a thickness of 0.3 mm or less.

The glass plate of the present invention is preferably a glass substrate for flat panel display.

In addition, as a sheet | seat, a resin film, a resin sheet, and a foamed resin sheet other than a slip sheet can be mentioned. Alternatively, a sheet in which at least two of these sheets are stacked and integrated may be used. Moreover, a glass plate shall include the glass plate by which the film is previously affixed on the surface.

Further, the present invention is a method for packing a glass plate laminate in which a glass plate laminate in which a plurality of glass plates are laminated via a sheet is packed in a packing container, and the glass plate has a thickness of 0.7 mm. The sheet is 50 to 100 μm in thickness, the density is 0.80 g / cm ³ or less, and the glass plate is laminated so that the thickness deviation of the glass plate laminate is 10% or less. Provided is a method for packing laminated glass plate laminates.

According to the method for packing a glass plate package and a glass plate laminate of the present invention, it is possible to reduce cracking and chipping of a glass plate having a thickness of 0.7 mm or less.

FIG. 1 is a perspective view of a vertically stacked glass plate package according to an embodiment of the present invention. FIG. 2 is a perspective view showing the entire structure of the vertically stacked packaging container shown in FIG. FIG. 3 is a side view of a vertically stacked glass plate package in which glass plate laminates are packed. FIG. 4 is a schematic side view of a glass plate package in which the lower sides of adjacent glass plates are stacked apart. FIG. 5 is a side view of the flat glass plate package according to the embodiment of the present invention. FIG. 6 is a graph showing the relationship between the deviation of the thickness of the glass plate laminate and the defect occurrence rate in the vertically stacked glass plate package. FIG. 7 is a graph showing the relationship between the deviation of the thickness of the glass plate laminate and the defect occurrence rate in the stacked glass plate package. FIG. 8 is an explanatory diagram showing the thickness measurement points of the glass plate laminate in the vertically stacked glass plate package. FIG. 9 is an explanatory view showing the thickness measurement points of the glass plate laminate in the flat glass plate package. FIG. 10 is an explanatory diagram showing angles when the glass plates are stacked.

Hereinafter, a preferred embodiment of a method for packing a glass plate package and a glass plate laminate according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a vertically stacked glass plate laminate 12 in which a plurality of rectangular glass plates G are vertically inclined and stacked via

rectangular interleaving papers

10, 10. Moreover, the state by which this glass plate laminated body 12 was packed in the packaging container 14 of embodiment is shown.

The glass plate G is used for an FPD glass substrate for a liquid crystal display or the like, and has a thickness of 0.7 mm or less. In the embodiment, the interleaf paper 10 is exemplified as a sheet interposed between the glass plate G and the glass plate G, but is not limited thereto. For example, also in a resin film, a resin sheet, and a foamed resin sheet, as long as the buffer requirement (cushioning property) and the thickness deviation requirement of the glass plate laminate described later are satisfied, it is applied instead of the interleaf paper 10 be able to. Moreover, the sheet | seat which laminated | stacked and integrated at least 2 sheets of these sheets may be sufficient. Moreover, the glass plate G includes the glass plate G by which the film is previously affixed on the surface.

FIG. 2 is a perspective view showing the overall configuration of the packaging container 14 and shows the lower

lateral pressing members

15A and 15B and the upper

lateral pressing members

17A and 17B. FIG. 3 is a side view of the glass plate package in which the glass plate laminate 12 is packed in the packing container 14. Further, FIG. 3 shows a state in which the side portion of the glass plate laminate 12 is pressed by the lower lateral holding member 15B and the upper lateral holding member 17B and the glass plate laminated body 12 is packed in the packing container 14. ing. That is, the packaging form of the glass plate laminated body 12 is shown in FIG. 3, and the taking-out form of the glass plate G and the interleaf paper 10 is shown in FIG. That is, when the glass plate G and the interleaf sheet 10 are taken out, the detachable unit portions of the lower

lateral pressing members

15A and 15B and the upper

lateral pressing members

17A and 17B shown in FIG.

As shown in FIG. 2, the packaging container 14 includes a pedestal 18 having a flat mounting surface 16 formed on the upper surface. Further, the packaging container 14 includes a flat bottom plate 20 that is provided to be inclined at an angle (θ ₁ ) of about 18 ° with respect to the mounting surface 16 and on which the lower edge of the glass plate is placed. Further, the packing container 14 includes an inclined base 22 that is inclined with respect to the bottom plate 20 at an angle of about 90 ° (θ ₂ ). A flat resin back plate 24 is fixed to the front surface of the inclined base 22 with an adhesive. The back plate 24 receives the surface of the glass plate G, and the glass plate laminate 12 is mounted on the packing container 14 in a vertical orientation. The number of glass plates G and interleaf paper 10 mounted on the packaging container 14 is, for example, 300 or more in the case of a sixth generation glass substrate and 250 or more in the case of a seventh generation glass substrate.

Further, the packaging container 14 is erected on the mounting surface 16 as shown in FIG. 1 and a bottom plate receiving member 26 that supports the bottom plate 20 on the mounting surface 16 at an angle (θ ₁ ) of about 18 ° with respect to the mounting surface 16. And a frame-shaped receiving member 28 that supports the back surface of the inclined base 22.

The pedestal 18 is formed by welding a large number of short and long steel materials in the vertical and horizontal directions and in the height direction, and the mounting surface 16 is processed to a predetermined flatness by grinding after the welding assembly. Further, the front and rear surfaces of the pedestal 18 are provided with

openings

30 and 30 through which forklift claws (not shown) are inserted and removed.

In order to protect the glass plate G, the interleaf paper 10 is a paper having a size larger than that of the glass plate G, and a part of the interleaf paper 10 protrudes from the side of the glass plate G. Of the protruding portion of the interleaf paper 10, an elongated upper edge portion 10c protruding from the upper side of the glass plate G is sucked and held by a suction pad of an unpacker (not shown) or has a pair of claws. The slip sheet 10 is taken out from the packing container 14 by being held by the king device. In addition, the raw material of the interleaf paper 10 is preferably virgin pulp. Furthermore, a raw material containing cellulose or the like may be used. The buffer requirement and thickness deviation requirement of the slip sheet 10 will be described later.

The lower

lateral pressing members

15A and 15B are composed of a main body 32 formed in a plate shape, a handle 34, a pressing plate 36, and the like.

The main body 32 has a shape obtained by bending a metal plate material having a predetermined shape by press molding, and is detachably fixed to the mounting surface 16 of the pedestal 18 by a bolt (not shown). A screw rod 38 is fixed to the center portion of the handle 34, and the screw rod 38 is screwed to the main body 32 in the horizontal direction. A pressing plate 36 is in contact with the tip of the screw rod 38. The pressing plate 36 is engaged with the main body 32 through a pair of guide bars 40, 40 so as to be movable in the horizontal direction. Further, the handle 34, the holding plate 36, the screw rod 38, and the guide bar 40 are unitized and attached to and detached from the main body 32. The members formed as a unit with respect to the lower

lateral pressing members

15A and 15B are configured to be dropped into the main body 32 and engaged. Therefore, when the handle 34 dropped into the main body 32 is rotated in the tightening direction, the pressing plate 36 is pushed by the screw rod 38 of the handle 34 and moves in the direction in which the lower side surface of the glass plate laminate 12 is pushed. By this operation, the lower side surface of the glass plate laminate 12 is sandwiched between the

press plates

36 and 36 of the pair of lower

lateral holding members

15A and 15B shown in FIG. 2, and the glass plate laminate 12 is fixed to the packaging container 14. The

As shown in FIG. 3, a rectangular buffer plate 42 having a predetermined thickness is placed on the surface of the glass plate laminate 12 loaded on the packaging container 14, and a front frame 44 is put on the surface. The lower end portion of the front frame 44 is engaged with the pedestal 18, is tilted about the lower end portion as a fulcrum, and is in contact with the surface of the buffer plate 42.

The upper lateral pressing member 17B is in contact with the side surface of the glass plate laminate 12 with its base end engaged with the frame-shaped receiving member 28 and cantilevered. Further, a hook 46 is provided on the upper side portion of the front frame 44, and a belt 48 is hung on the hook 46. The belt 48 is arranged so as to cross the upper lateral pressing member 17 </ b> B, and an end portion of the belt 48 is connected to the inclined base 22 via a ratchet type winding device 50. Therefore, by driving the ratchet type hoisting device 50 and winding up the belt 48, the front frame 44 is fixed to the inclined base 22 by the tension of the belt 48. Note that the upper lateral pressing member 17A has the same configuration as the upper lateral pressing member 17B.

By the way, in order to satisfy the buffering performance of the glass plate G, the slip sheet 10 of the embodiment has a thickness of 50 to 100 μm and a density of 0.80 g / cm ³ or less. Moreover, it is the slip sheet 10 in which the deviation of the thickness of the glass plate laminate 12 is 10% or less.

In the embodiment, as the glass sheet interleaf 10 having a thickness of 0.7 mm or less, not only the thickness and density which are buffer requirements are defined, but also the deviation of the thickness of the glass sheet laminate 12 is 10% or less. Stipulated.

The large thickness deviation means that wrinkles are generated in the interleaf paper 10 of the glass plate laminate 12 or the interval between the adjacent glass plates G is large. In particular, in the case of a vertically stacked glass plate package, since the glass plate G is slanted as shown in FIG. 4, the lower side of the glass plate G is spaced from the lower side of the adjacent glass plate G. Phenomenon occurs. Since this phenomenon requires the glass plate G to be loaded on the bottom plate 20 with the glass plate G separated from the bottom plate 20 by several mm so that the bottom plate 20 and the glass plate G shown in FIG. This is caused by dropping the glass plate G to the bottom plate 20 by 10 mm or more. In order to suppress the occurrence of this phenomenon, the size management of the packaging container 14, particularly the height management of the bottom plate 20, the positioning accuracy of the glass plate G is improved, and the teaching of the robot is strictly performed, and the glass plate G is loaded on the bottom plate 20. It is necessary to reduce the distance between the glass plate G and the bottom plate 20, and the distance between the glass plate G and the bottom plate 20 is less than 10 mm, preferably 5 mm or less, more preferably 3 mm or less. In addition, it is preferable that the dimensional error of the packaging container 14 is within ± 3 mm.

The following method can also be used to reduce the thickness deviation of the glass plate laminate 12. After the glass plate G is leaned diagonally on the vertical packing container 14, the packing container 14 is tilted in the direction of the back plate 24 so that the glass plate G is almost horizontal, and the thickness of the glass plate laminate 12 is determined by its own weight. After the deviation is reduced, the packaging container 14 is returned to the original position. Thereby, the thickness deviation itself of the glass plate laminate can be reduced under the influence of gravity.

In particular, in a glass plate having a thickness of 0.7 mm or less, it is confirmed by experiment that cracks and cracks are remarkably generated in the glass plate G during storage and transportation when the thickness deviation of the glass plate laminate is large. did. And it was confirmed by experiment that the said crack chip | tip reduces significantly by prescribing | regulating the deviation of the thickness of the glass plate laminated body 12 to 10% or less.

On the other hand, the thickness of the interleaf paper 10 is defined to be 50 to 100 μm in order to satisfy the function of the buffer material. That is, if the thickness is less than 50 μm, the interleaf paper 10 is too thin to function as a buffer material, and if the thickness exceeds 100 μm, the interleaf paper 10 becomes too thick. Wrinkles are likely to occur. Generation of wrinkles in the interleaf paper 10 means that the deviation of the thickness of the glass plate laminate described above becomes large, and therefore it is difficult to suppress the deviation of the thickness of the glass plate laminate to 10% or less. Become. The thickness of the slip sheet 10 is more preferably 70 to 80 μm.

Further, the cause of wrinkles in the slip sheet 10 is not only the thickness of the slip sheet 10, but it is necessary to manage the humidity of the environment to which the slip sheet 10 is exposed. The humidity of the environment to which the interleaving paper 10 is exposed is preferably 40% or less. That is, when the slip sheet 10 is exposed to a high humidity environment, the slip sheet 10 absorbs moisture and wrinkles occur in the slip sheet 10. Therefore, in order to prevent wrinkles from occurring in the interleaf paper 10, the interleaf paper can be double-packed, vinyl, aluminum, etc. so that it is not affected by humidity when the interleaf paper 10 is shipped from the interleaf paper manufacturer. It is also important to pack slip sheets with foil. Moreover, it is necessary to manage the humidity of the slip sheet receiving warehouse from the slip sheet manufacturer, the factory in which the slip sheet 10 is interposed between the glass plates G, and the glass plate laminate 12 itself.

As an example of humidity management, a desiccant 51 packed in a net is inserted and disposed in the opening 30 provided in the bottom plate receiving member 26 of the packaging container 14 as shown in FIG. The glass plate package in which the glass plate laminate 12 is packed is packaged by a vinyl sheet at the time of shipment, but the desiccant 51 absorbs moisture in the sealed space packaged in the vinyl sheet. Thereby, since the humidity of glass plate laminated body 12 itself is managed low, wrinkle generation | occurrence | production of the slip sheet 10 can be prevented. It is also a good idea to seal the roll paper from the paper manufacturer with vinyl and place the desiccant in it.

Here, the deviation of the thickness of the glass plate laminate 12 means that the thickness of the glass plate laminate 12 is measured at several peripheral portions of the glass plate laminate 12, the maximum value is obtained, and the ideal thickness is determined from the maximum value. This is a value obtained by subtracting the thickness and dividing the thickness obtained by subtraction by the ideal thickness. The ideal thickness is the sum of the value obtained by multiplying the manufacturer's official value for the thickness of the glass plate G by the number of laminated glass plates G and the value obtained by multiplying the manufacturer's official value for the thickness of the slip sheet 10 by the number of laminated sheets. Thickness.

Moreover, the thickness of the glass plate laminated body 12 in the glass plate package shown in FIG. 1 and FIG. 3 can be measured with a vernier caliper or a metal ruler. Can be measured. In the case of the packaging container 54 for packing the flat glass plate laminate 52 in which the glass plates are horizontally laminated as shown in FIG. 5, the glass plate G is likely to be broken and broken in contact with the

lateral pressing members

60 and 60. Part. In addition, the code | symbol 56 of FIG. 5 is an upper pan part, and the glass plate laminated body 52 is piled up on the main body 58 of the packaging container 54 via this upper pan part 56. FIG.

Further, since the slip sheet 10 needs to satisfy the function as a buffer material, its density is defined to be 0.80 g / cm ³ or less. That is, when the density exceeds 0.80 g / cm ³ , the interleaf paper 10 becomes too hard, so that it does not function as a buffer material for the glass plate G having a thickness of 0.3 mm or less.

Note that the thickness deviation of the glass plate laminate is specified to be 10% or less in the case of the vertically stacked glass plate laminate 12 shown in FIGS. Further, in the case of a packaging container 54 for packing a flat glass plate laminate 52 in which glass plates are horizontally laminated as shown in FIG. 5, the thickness deviation of the glass plate laminate 52 is regulated to 3% or less. be able to. That is, in the case of the vertically stacked glass plate laminates 12, the weight of the glass plate G does not contribute to the reduction of the thickness deviation, so the thickness deviation is set to 10% or less which is the maximum allowable value. On the other hand, in the case of the flat glass plate laminate 52 in which the weight of the glass plate G contributes to the reduction of the thickness deviation, the thickness deviation can be specified to 3% or less.

[Experimental example]
FIG. 6 shows the occurrence rate of defects (breaking cracks) of glass plates (product name AN100, manufactured by Asahi Glass Co., Ltd.) having a thickness of 0.7 mm and 0.3 mm of the glass plate laminate 12 in the vertically stacked glass plate package. FIG. 7 is a graph showing the defect occurrence rate of glass plates having thicknesses of 0.7 mm and 0.3 mm in the glass plate laminate 12 in the flat glass plate package. The vertical axis | shaft of these graphs showed the defect incidence rate of the glass plate, and the horizontal axis has shown the deviation of the thickness of a glass plate laminated body. In addition, these experiments were performed by preparing 200 glass plate packages in which glass plates having a size of 1800 mm × 1500 mm were laminated via interleaving paper. Among them, the number of glass plate packages in which cracks and chips are generated during conveyance is defined as the defect occurrence rate. That is, the defect occurrence rate of 5% means that cracks and cracks were observed in one or more glass plates in 10 of the 200 packing bodies.
Moreover, the thickness measurement location of the glass plate laminated body 12 in the vertically stacked glass plate package is as follows. There are four places.

Here, an example of a calculation example of the thickness deviation of the glass plate laminate will be described.
Thickness of glass plate G: 0.7mm (Manufacturer's official value)
Thickness of interleaf paper 10: 0.07mm (manufacturer's notarized value)
Number of glass plates G: 300 Number of interleaf sheets 10: 300 Ideal thickness of glass plate laminate = 0.7 × 300 + 0.07 × 300 = 231 mm
Upper right corner a thickness: 237.5mm
Lower right corner b thickness: 242.5mm
Upper left corner c thickness: 236.5 mm
Lower left corner d thickness: 242.5mm
Maximum thickness of glass plate laminate: 242.5 mm
Deviation of thickness of glass plate laminate (%) = (242.5-231) × 100/231 = 5 (%)

In addition, the thickness measurement location of the glass plate laminate 12 in the flat glass plate package includes four locations a to d at the four corners indicated by the two-dot chain line in FIG. 9 and the side presser member 60 shown in FIG. 8 points e to l indicated by a two-dot chain line pushed by.

In a vertically stacked glass plate package, as shown in FIG. 6 and Table 1 below, the glass plate having a thickness of 0.7 mm and the glass plate having a thickness of 0.3 mm both have a deviation in the thickness of the glass plate laminate. Although cracking and chipping did not occur up to 10%, cracking and chipping occurred when exceeding 10%. It was also found that the defect occurrence rate of the glass plate having a thickness of 0.3 mm is higher than that of the glass plate having a thickness of 0.7 mm as the thickness deviation increases.

On the other hand, in the flat stacked glass plate package, as shown in FIG. 7 and Table 2 below, both the 0.7 mm thick glass plate and the 0.3 mm glass plate are of the thickness of the glass plate laminate. Cracks were not generated up to a deviation of 3%. However, when the deviation exceeded 3%, cracks were generated. It was also found that the defect occurrence rate of the glass plate having a thickness of 0.3 mm is higher than that of the glass plate having a thickness of 0.7 mm as the thickness deviation increases.

In addition, the slip sheet 10 of the embodiment has a paper smoothness of 20 seconds in order to prevent the resin content contained in the slip sheet 10 from being transferred to the surface of the glass plate G and causing paper texture, burns, and dirt. The rough surface is preferably 18 seconds or shorter. Thereby, since a contact area with the surface of the glass plate G reduces, transfer of a resin part can be prevented.

In addition, when laminating | stacking the glass plate G on the vertical packaging container 14 shown in FIG. 2, as shown in FIG. 10, the angle (theta) of the surface of the glass plate G and the mounting surface 16 is 45 degrees or more and less than 90 degrees. preferable. That is, when θ ₁ = 18 ° and θ ₂ = 90 ° in FIG. 2, the angle θ = 72 ° in FIG. 10 is obtained, but is not limited to θ = 72 °, and the angle θ is 45 ° or more and 90 °. It may be in the range of less than °.
Moreover, when laminating | stacking the glass plate G on the flat packing container 54 shown in FIG. 5, as shown in FIG. 10, angle (theta) of the surface of the glass plate G and the upper plate part 56 is 0 degree or more and 10 degrees or less. Is preferred.

Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the scope and spirit of the invention.
This application is based on Japanese Patent Application 2010-103851 filed on April 28, 2010, the contents of which are incorporated herein by reference.

G ... Glass plate, 10 ... Interleaf, 12 ... Glass plate laminate, 14 ... Packing container, 15A, 15B ... Lower lateral pressing member, 16 ... Mounting surface, 17A, 17B ... Upper lateral pressing member, 18 ... Base, 20 DESCRIPTION OF SYMBOLS ... Bottom plate, 22 ... Inclined base, 24 ... Back plate, 26 ... Bottom plate receiving member, 28 ... Frame-shaped receiving member, 30 ... Opening part, 32 ... Main body, 34 ... Handle, 36 ... Holding plate, 38 ... Screw rod, 40 DESCRIPTION OF SYMBOLS ... Guide bar, 42 ... Buffer plate, 44 ... Front frame, 46 ... Hook, 48 ... Belt, 50 ... Ratchet type winding device, 51 ... Desiccant, 52 ... Glass plate laminate, 54 ... Packing container, 56 ... Top Plate part, 58... Body, 60 .. lateral holding member

Claims

In a glass plate package in which a plurality of glass plates are laminated via sheets, the glass plate package is packed in a packaging container.
The glass plate has a thickness of 0.7 mm or less, and the glass plate laminate is a vertically stacked glass plate laminate in which the glass plates are laminated while being inclined with respect to a vertical direction, and the glass plate laminate A glass plate package having a body thickness deviation of 10% or less.
In a glass plate package in which a plurality of glass plates are laminated via sheets, the glass plate package is packed in a packaging container.
The glass plate has a thickness of 0.7 mm or less, and the glass plate laminate is a flat glass plate laminate in which the glass plates are horizontally laminated, and the thickness deviation of the glass plate laminate A glass plate package having 3% or less.
The glass plate package according to claim 1 or 2, wherein the sheet has a thickness of 50 to 100 µm and a density of 0.80 g / cm 3 or less.
The glass plate package according to any one of claims 1 to 3, wherein a size of the glass plate is 1800 mm x 1500 mm or more.
The glass plate package according to any one of claims 1 to 4, wherein the glass plate has a thickness of 0.3 mm or less.
The glass plate package according to any one of claims 1 to 5, wherein the glass plate is a glass substrate for a flat panel display.
A method of packing a glass plate laminate in which a glass plate laminate in which a plurality of glass plates are laminated via a sheet is packed in a packing container, wherein the glass plate has a thickness of 0.7 mm or less, and the sheet Has a thickness of 50 to 100 μm, a density of 0.80 g / cm 3 or less, and a glass plate laminate in which the glass plates are laminated so that the deviation of the thickness of the glass plate laminate is 10% or less. Packing method.