WO2011132646A1 - Glass plate stack, pallet and glass plate package - Google Patents

Abstract

Disclosed is a glass plate stack comprising: a plurality of glass plates, each having two principal surfaces and four edge faces, and sheets interposed between each of the plurality of glass plates. The glass plate stack is stacked such that the direction of lines formed on the principal surfaces of the plurality of glass plates is uniform.

Description

Glass plate laminate, pallet and glass plate package

The present invention relates to a glass plate laminate, a pallet, and a glass plate package, and more particularly to a glass plate laminate, a pallet, and a glass plate package in which a plurality of glass plates are laminated via sheets such as slip sheets.

FPD (Flat Panel Display) glass substrates such as architectural glass plates, automotive glass plates, glass substrates for plasma displays, and glass substrates for liquid crystals are used on the surface during storage or transportation. Contaminated and prone to product defects. In particular, when used as a glass substrate that incorporates an electric circuit on its use surface, such as a non-alkali glass substrate used for a liquid crystal display glass substrate, even if there are slight wrinkles or contamination on the use surface, Patterning failure occurs. Therefore, such a glass substrate is required to have extremely high surface characteristics.

Therefore, as a method for preventing wrinkles and contamination during storage and transportation of glass plates, so-called slip sheets that separate the surfaces of adjacent glass plates by interposing paper between the glass plates to be laminated. The glass plate laminated body which interposed is disclosed by patent document 1. FIG.

The glass plate laminate of Patent Document 1 is obtained by alternately stacking a plurality of glass plates and slip sheets on a vertically stacked pallet in which glass plates are slanted and stacked.

Patent Document 2 discloses a stacked glass plate laminate in which a protective sheet is interposed between each of a plurality of glass plates and stacked in a flat state on a pallet.

Incidentally, streaks along the glass plate forming direction (glass ribbon drawing direction) are formed on the surface of the glass plate stacked on the pallet in the manufacturing process.

The streak is a streak generated in the drawing direction of the glass plate due to fluctuations in plate thickness and waviness in a direction perpendicular to the drawing direction of the glass plate (glass ribbon). The direction in which the lines extend is called the line direction.

Furthermore, the disadvantage of bubbles (including open bubbles) present in the glass ribbon is either spherical or due to the viscosity history of the glass and the tensile force history in the stretching direction after the bubble is generated. It becomes a stretched shape. The lines are formed on the glass plate even by the float method and fusion method, which are glass plate manufacturing methods.

Japanese Unexamined Patent Publication No. 2001-139138 Japanese Unexamined Patent Publication No. 2010-36948

When the glass plate is a display glass substrate, the glass plate laminate stored in the pallet is transported from the glass manufacturing plant to the display assembly plant. Here, after the glass substrate is unpacked from the pallet, it is taken out from the pallet one by one and carried out to the assembly line. The manufacturing process of the assembly line includes a process of forming wiring such as a wiring pattern of a pixel electrode and a wiring pattern of an integrated circuit made of a thin film transistor on a use surface of a glass substrate.

In such a wiring pattern forming process, it is considered preferable that the wiring is formed along the long diameter direction of the opening bubble from the viewpoint of preventing the wiring from being disconnected by the opening bubble. That is, it is necessary to use a glass substrate in consideration of the direction of the lines.

However, since the conventional glass plate laminate does not laminate the glass substrate in consideration of the direction of the lines, the display assembly factory cannot recognize the direction of the lines. For this reason, in the display assembly factory, there is a problem that the probability that the wiring is broken by the open bubbles increases, and the yield of the product decreases.

The present invention has been made in view of such circumstances, and by devising the laminated form of the glass plates, it is possible to eliminate problems such as a decrease in product yield during the manufacture of products using the glass plates. It aims at providing a glass plate laminated body, a pallet, and a glass plate package.

The present invention comprises a plurality of glass plates each having two main surfaces and four end surfaces, and a sheet interposed between each of the plurality of glass plates, and the main surfaces of the plurality of glass plates Provided is a glass plate laminate that is laminated in a state in which the direction of the lines formed in is unified.

Further, the present invention provides a pallet for packing the glass plate laminate, and having a display unit for displaying the direction of the lines of the glass plate of the packed glass plate laminate.

Further, the present invention comprises a plurality of glass plates each having two main surfaces and four end surfaces, and a sheet interposed between each of the plurality of glass plates. A glass plate package comprising a glass plate laminate and a pallet having a bottom plate, which are laminated with the direction of the lines formed on the main surface being unified, and one end face of each glass plate However, it provides a glass plate package in which the glass plate laminate is packed on the pallet so as to be in contact with the bottom plate of the pallet.

Further, the present invention comprises a plurality of glass plates each having two main surfaces and four end surfaces, and a sheet interposed between each of the plurality of glass plates. A glass plate package comprising a glass plate laminate and a pallet having a bottom plate, which are laminated in a state in which the direction of the lines formed on the main surface is unified, and among the plurality of glass plates Provided is a glass plate package in which the glass plate laminate is packed on the pallet so that one main surface of one glass plate is in contact with the bottom plate of the pallet.

Moreover, it is preferable that the glass plate package of the present invention further includes a display unit that displays the direction of the lines of the glass plate of the glass plate laminate in which the pallet is packed.

According to the glass plate laminate of the present invention, the laminated form of the glass plates has been devised so that a plurality of glass plates are laminated on the pallet with the direction of the lines formed on the main surface of the glass plate being unified. Therefore, problems such as a decrease in product yield during the manufacture of products using the glass plate can be solved. In addition, according to the pallet of the present invention, by checking the display unit provided on the pallet, it is possible to confirm the line direction of the glass plate of the glass plate laminated body packed in the pallet.

FIG. 1 is a perspective view of a pallet on which a glass plate laminate according to an embodiment of the present invention is mounted. FIG. 2 is a perspective view showing the overall structure of the pallet shown in FIG. FIG. 3 is a side view of a pallet packed with a glass plate laminate. FIG. 4 is an enlarged explanatory view of a main part showing a laminated form of glass plates. FIG. 5 is a side view of a pallet on which glass plate laminates are placed in a flat stack. Fig.6 (a) is a top view of the glass plate which has the line | wire along the direction of the long side of a glass plate. FIG.6 (b) is a top view of the glass plate which has the line | wire along the direction of the short side of a glass plate. FIG. 7 is an explanatory view showing an example in which a base plate of long side stripes and a base plate of short side stripes are sampled from a glass ribbon.

Hereinafter, preferred embodiments of a glass plate laminate, a pallet and a glass plate package according to the present invention will be described in detail with reference to the accompanying drawings. In this specification, “upward” means vertically upward, and “downward” means vertically downward.

FIG. 1 shows a glass plate laminate 12 according to an embodiment in which a plurality of rectangular glass plates G are vertically stacked via rectangular interleaving papers 10, 10. Moreover, the state by which this glass plate laminated body 12 was accommodated in the vertically stacked glass plate packing pallet 14 is shown. Since the glass plate G is rectangular, it has two main surfaces and four end surfaces. In the embodiment, the slip sheet 10 is exemplified as the sheet, but the present invention is not limited to this. For example, a resin film, a resin sheet, and a foamed resin sheet can also be applied as a sheet. Further, although the vertically stacked pallet 14 is illustrated as the pallet, a flat pallet 60 shown in FIG. 5 may be used. The pallet 60 will be described later.

FIG. 2 is a perspective view showing the overall configuration of the pallet 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 pallet 14 in which the glass plate laminate 12 is packed. Further, FIG. 3 shows a state in which the side portion of the glass plate laminate 12 is pressed by the lower lateral pressing member 15B and the upper lateral pressing member 17B and the glass plate laminated body 12 is packed on the pallet 14. Yes. 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 sheet G and the interleaf sheet 10 are taken out, the upper side pressing members 17A and 17B shown in FIG. 2 are removed from the pallet 14, and part of the lower side pressing members 15A and 15B are removed from the pallet 14. This part will be described later.

As shown in FIG. 2, the pallet 14 includes a pedestal 18 having a flat mounting surface 16 formed on the upper surface. The pallet 14 is provided with 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 bottom side (one end surface) of the glass plate is placed. . Further, the pallet 14 is provided with an inclined table 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 back surface (one of the main surfaces) of the glass plate G, and the glass plate laminate 12 is mounted on the pallet 14 vertically.

The pallet 14 also supports the bottom plate receiving member 26 that supports the bottom plate 20 on the mounting surface 16 at an angle (θ ₁ ) of about 18 °, and the rear surface of the tilting table 22 that is erected on the mounting surface 16 as shown in FIG. And a frame-shaped receiving member 28.

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.

The interleaf paper 10 is a sheet interposed between the glass plates G in order to prevent the glass plates G from directly contacting each other. The slip paper 10 has a smoothness of the paper of 20 seconds or less, preferably 18 in order to prevent the resin content contained in the slip paper 10 from being transferred to the surface of the glass plate G and causing paper texture, burns, and dirt. The rough surface is less than a second. Thereby, since a contact area with the surface of the glass plate G reduces, transfer of a resin part can be prevented. Moreover, the quality of the glass plate G can be hold | maintained by the combined effect with a rough surface by making the resin content which the interleaf paper 10 contains is 0.1% or less, Preferably it is 0.05% or less. Therefore, even if particles or the like are generated on the interleaf paper 10, the particles or the like do not adhere to the surface of the glass plate G in combination with the glass plate G leaning on the pallet 14 and packing.

In order to protect the glass plate G, the interleaf paper 10 is paper having a size larger than that of the glass plate G, and a part of the interleaf paper 10 is protruded from the side portion of the glass plate G. The elongated upper edge portion 10c of the interleaving paper 10 projecting from the upper side portion of the glass plate G is adsorbed and held by an unillustrated suction pad of an unpacker, and the interleaving paper 10 is pallet 14. Taken from. The amount of protrusion of the slip sheet 10 from the upper side of the glass plate G is preferably 50 mm or more and 200 mm or less. When the protruding amount of the upper edge portion of the interleaf paper 10 is less than 50 mm, the protruding area is preferably 50 mm or more because the gripping area by the interleaf paper gripping portion is too small. Further, if the amount of protrusion exceeds 200 mm, the upper edge portion may hang down due to the weight of the protruding upper edge portion, so that the amount of protrusion is preferably 200 mm or less.

Further, when the glass plates G are stacked vertically like the pallet 14, when the slip sheet 10 protrudes from the lower side of the glass plate G, a large number of glass plates G, G... Otherwise, the vicinity of the lower side of the glass plate G may be damaged during packaging or transport. Therefore, the slip sheet 10 does not protrude from the lower side portion of the glass plate G, and protrudes outward only from the upper side portion and the left and right side portions of the glass plate G.

The raw material of the interleaving paper 10 may be waste paper, virgin pulp, or a mixture thereof. Furthermore, a raw material containing cellulose or the like may be used.

As shown in FIG. 1, all the interleaf sheets 10, 10... Is bent to the back plate 24 side along both sides.

In the glass plate laminate 12, when the side edge portions 10a and 10b of the slip sheet 10 projecting laterally from both side portions of the glass plate G are bent, the upper edge of the slip sheet projecting from the top side portion of the glass plate G In the portion 10c, a drag force is generated in the sag direction. Due to this drag, the upper edge portion 10c of the interleaf paper 10 becomes rigid and does not hang down, so that the interleaf paper 10 can be satisfactorily taken out from the pallet 14. The protruding amount of the slip sheet 10 protruding sideways from both side portions of the glass plate G is preferably 15 mm to 35 mm, and more preferably 20 mm to 30 mm.

The lower lateral pressing members 15A and 15B are composed of a main body 32 formed in a plate shape, and a pressing unit 37 provided with a handle 34, a pressing plate 36, and the like. The holding unit 37 is configured to be detachable from the main body 32. That is, a part of the lower lateral pressing members 15 </ b> A and 15 </ b> B removed from the pallet 14 when the glass sheet G and the interleaf sheet 10 are taken out is the pressing unit 37.

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 pressing unit 37 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 pressing unit 37 through a pair of guide bars 40, 40 so as to be movable in the horizontal direction. Therefore, when the handle 34 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 pressed. 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 press members 15A and 15B shown in FIG. 1, and the glass plate laminate 12 is fixed to the pallet 14. . Then, both side edge portions 10 a and 10 b of the slip sheet 10 protruding from both side portions of the glass plate G are bent toward the inclined base 22 by the respective pressing plates 36 and 36.

Next, the upper lateral holding members 17A and 17B will be described.

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 pallet 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 the base end engaged with the inclined base 22 and cantilevered. The upper side pressing member 17 </ b> B folds the right edge portion 10 b of the slip sheet 10 protruding from the right side portion of the glass plate G in FIG.

Further, a hook 46 is provided on an 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. At the same time, the upper side pressing member 17B is pressed against the right side surface of the glass plate laminate 12 by the stretched belt 48, so that the right edge of the slip sheet 10 protruding from the right side portion of the glass plate G is obtained. The portion 10 b is strongly bent toward the inclined base 22.

Note that the upper lateral pressing member 17A has the same configuration as the upper lateral pressing member 17B. Therefore, the left side edge portion 10a of the slip sheet 10 protruding from the left side portion of the glass plate G is strongly bent toward the inclined table 22 by the upper lateral pressing member 17A.

As described above, the side edge portions 10a and 10b of the slip sheet 10 are bent toward the inclined base 22 by the lower lateral pressing members 15A and 15B and the upper lateral pressing members 17A and 17B.

FIG. 4 shows three glass plates G among the plurality of glass plates G of the glass plate laminate 12, but the same applies to the other glass plates G. In FIG. 4, the slip sheet 10 interposed between the glass plate G and the glass plate G is omitted.

The base plate of the long side streaks or the base plate of the short side streaks is taken from the glass ribbon, and the glass plate G is obtained by processing such as chamfering or polishing. 6 (a) and 6 (b) are explanatory diagrams showing long side streaks and short side streaks. The long side streak is a streak 52 along the longitudinal direction of the glass sheet G (that is, the direction of the long side) as shown in FIG. Further, the short side streak is a streak 52 along the direction of the short side of the glass plate G, as shown in FIG.

Figure 7 is an explanatory diagram showing an example of Toita the material plate G ₂ of the material plate G ₁ and short side streaks long side streaks from glass ribbon GR. As shown in FIG. 7, a rectangular element plate the orientation of the long side is the same as the extending direction of the glass ribbon GR, and Toita as plain plates G ₁ of the long sides streaks, short side orientation of the glass ribbon GR the rectangular material plate which is the same as the stretching direction may be Toita as plain plates G ₂ short sides streaks. However, FIG. 7 is an illustration of the plate-pickup method, and plate-making may be performed by other methods. For example, the element plate G ₁ long side streaks from glass ribbon GR and Toita, splitting vertically the material plate G ₁ in the long side, there is a case where the material plate G ₂ short sides streaks is obtained. In this way, the base plate that has been sampled may be divided to cut out a base plate of a desired line.

Further, as the glass ribbon GR used in the sampling plate, for example, a glass ribbon generated by a float method may be used, but a glass ribbon generated by a method other than the float method (for example, a longitudinal drawing method or the like) may be used.

The glass plate G of the long side streaks shown in FIG. 6A or the glass plate G of the short side streaks shown in FIG. 6B is the glass plate laminate 12 of the embodiment as shown in FIG. As shown in FIG. 1, a plurality of (three in FIG. 4) glass plates G are stored in the pallet 14 in FIG. 1 in a state where the directions of the streaks 52 formed on the surface of the glass plate G are unified.

Thus, in the glass plate laminated body 12 of embodiment, in the state which unified the direction of the streak 52 attached to the surface of the glass plate G at the time of manufacture of the glass plate G, all the glass plates G are put into the pallet 14. Stored. Thereby, problems, such as a product yield fall at the time of manufacture of the product using the glass plate resulting from the glass plate laminated body laminated without unifying the direction of the line 52, can be solved.

The pallet for storing the glass sheets G may be the vertically stacked pallet 14 shown in FIGS. 1 to 3 or the well-known flat stacked pallet 60 shown in FIG.

The glass plate G is placed and stacked on the pallet 60 so that one main surface is in contact with the bottom plate 62 of the pallet 60. 5 denotes a main body of the pallet 60, and the glass plate laminate 12 is stacked on the main body 64 via the bottom plate 62.

Regarding the direction of the streak 52 of the plurality of glass plates G stacked on the pallet, for example, in the case of the vertically stacked pallet 14 shown in FIGS. 1 to 3, the vertical direction and the direction of the streak 52 are the same, or You may display on the glass plate laminated body 12 that the direction of the line 52 is orthogonal to the up-down direction.

The glass plate G is laminated in a direction perpendicular to the direction of the streak 52 with respect to the vertical direction. It means that it is parallel to the ridgeline formed between the end surface of the glass plate G which touches. Here, the ridge line means an edge formed between the main surface of the glass plate G and the end surface of the glass plate G.

As a means for displaying the direction of the line 52, it is one of the means to clearly indicate the direction of the line 52 of the glass plate G of the glass plate laminate 12 stored in the pallet 14 in the specification of the pallet 14.

In addition, even if it is the glass plate laminated body 12 accommodated in a flat pallet, the direction of the streak 52 is displayed by displaying the direction of the streak 52 on the glass plate laminated body 12 or specifying it in the specification sheet. May be.

When the direction of the streak 52 is displayed on the glass plate laminate 12, it cannot be displayed directly on the glass plate G. For example, the direction of the streak 52 is described on a removable tape, and the tape is made of glass. What is necessary is just to affix on the place which is easy to see visually, such as the surface side of the board laminated body 12, and a side surface side. Moreover, although the direction of the streak 52 can be directly described on a sheet such as the slip sheet 10, the tape may be attached to the sheet. Further, this tape may be attached to the pallet 14. Furthermore, it is preferable to specify in the specification the direction in which the streak 52 is oriented with respect to the position of the orientation flat of the glass plate or the like in which the orientation flat is formed at the corner of the glass plate G.

In the case of a glass substrate for a liquid crystal display, one surface is a use surface (surface on which wiring is formed), and the direction of the streak 52 on this use surface is important when forming the wiring. It is preferable to specify the surface at the same time. Further, since the above-described orientation flat is used as a marker for specifying the use surface, a specification that clearly specifies the direction of the streak 52 and the use surface based on the position of the orientation flat is desirable.
Moreover, you may attach the display part 66 which displays the grid direction of the glass plate G of the glass plate laminated body 12 to the pallets 14 and 60 shown in FIG.1, FIG.2, FIG.5. The display unit 66 may be a bar code or IC chip in which information on the direction of the stripe is recorded, or may be a plate or paper on which the direction of the stripe is indicated by an arrow. Therefore, by confirming the display unit 66, it is possible to confirm the line direction of the glass plate G of the glass plate laminate 12 packed in the pallets 14 and 60. In addition, the attachment position of the display unit 66 may be any position on the pallets 14 and 60.

In the glass plate laminated body 12 of embodiment, although the size and thickness of the glass plate G are not limited, as the glass plate G, the glass substrate for 6th generation FPD (1500 mm x 1850 mm, thickness 0.2) Or a glass substrate for FPD of 1st generation (1950 mm × 2250 mm, thickness 0.2 to 0.7 mm).

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 No. 2010-099000 filed on Apr. 22, 2010, the contents of which are incorporated herein by reference.

G ... Glass plate, G ₁ ... Long side streaks, G ₂ ... Short side streaks, 10 ... Interleaving paper, 10a, 10b ... Side edge portion, 10c ... Top edge portion, 12 ... Glass plate laminate 14 ... Glass plate packing pallet, 15A, 15B ... Lower lateral pressing member, 16 ... Mounting surface, 17A, 17B ... Upper lateral pressing member, 18 ... Base, 20 ... Bottom plate, 22 ... Inclined base, 24 ... Back plate, 26 ... bottom plate receiving member, 28 ... frame-shaped receiving member, 30 ... opening, 32 ... main body, 34 ... handle, 36 ... pressing plate, 38 ... screw rod, 40 ... guide bar, 42 ... buffer plate, 44 ... front frame , 46 ... hook, 48 ... belt, 50 ... ratchet type hoisting device, 52 ... streaks, 60 ... pallet, 62 ... bottom plate, 64 ... main body, 66 ... display section

Claims (5)

1. A plurality of glass plates each having two main surfaces and four end surfaces; and a sheet interposed between each of the plurality of glass plates, and formed on a main surface of the plurality of glass plates. A glass plate laminate that is laminated with the direction of the streak lines being unified.
2. A pallet for packing the glass plate laminate according to claim 1, wherein the pallet has a display unit for displaying a line direction of the glass plate of the packed glass plate laminate.
3. A plurality of glass plates each having two main surfaces and four end surfaces; and a sheet interposed between each of the plurality of glass plates, and formed on a main surface of the plurality of glass plates. A laminated glass plate in which the direction of the streak is unified,
   A pallet having a bottom plate;
   A glass plate package comprising:
   The glass plate package body in which the glass plate laminate is packed on the pallet so that one end face of each glass plate is in contact with the bottom plate of the pallet.
4. A plurality of glass plates each having two main surfaces and four end surfaces; and a sheet interposed between each of the plurality of glass plates, and formed on a main surface of the plurality of glass plates. A laminated glass plate in which the direction of the streak is unified,
   A pallet having a bottom plate;
   A glass plate package comprising:
   The glass plate package in which the glass plate laminate is packed on the pallet such that one main surface of one glass plate of the plurality of glass plates is in contact with the bottom plate of the pallet.
5. The glass plate package according to claim 3 or 4, wherein the pallet further has a display unit for displaying a direction of a line of the glass plate of the packed glass plate laminate.

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