Glass plate package and method for unpacking glass plate package

Abstract

To improve workability when carrying a glass plate packing body in and out of a container by suppressing the height and width of the glass plate packing body where large glass plates are packed and widening a gap between the glass plate packing body and an inner wall of the container.SOLUTION: A glass plate packing body 1 comprises: a glass plate laminate 3 formed by alternately stacking a plurality of glass plates and a plurality of packing buffer sheets S in a vertical posture; and a pallet 2 having a bottom plate 21 supporting a bottom surface part of the glass plate laminate, a back plate 22 supporting a back surface part of the glass plate laminate, a base portion 24 fixing the bottom plate and the back plate, and a buffer plate 23 arranged between the glass plate laminate and the back plate, wherein an upper end of the back plate is lower than an upper end of the buffer plate in a direction along the vertical side of the glass plate.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an improvement to a glass sheet package for improving the work efficiency when the glass sheet package is carried in and out of a container. [Background technology]

[0002] Glass plates used for glass substrates for displays and the like are stacked on a pallet at the time of shipment, a pressing plate is placed on the front of the stacked glass plates, and the stacked glass plates are bundled with a tie belt to be packaged together with the pallet. Typical stacking forms of glass plates on a pallet are a horizontal stacking form in which the plates are stacked flat on a pallet placed on a horizontal floor, or a vertical stacking form in which the plates are stacked so as to lean against a substantially vertical or inclined pallet, and the vertical stacking form is advantageous in terms of ease of loading / unloading the glass plates onto the pallet, efficiency of the pallet installation area, and the like (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-57051 A Summary of the Invention [Problem to be solved by the invention]

[0004] When a glass sheet package is transported, it is usually accommodated in a general container manufactured based on an international unified standard. In recent years, glass sheets have become larger in size in order to improve the efficiency of the glass substrate manufacturing process, but the size of the container is limited, so the gap between the glass sheet package accommodated in the container and the inner wall of the container is narrowed. When the gap between the glass sheet package and the inner wall of the container is narrowed, workers are forced to carry out the glass sheet package in and out of the container more carefully, which deteriorates the workability. A method of widening the gap by enlarging the container in accordance with the increase in size of the glass sheet is not practical because of problems such as a decrease in transportation efficiency due to the use of non-standard containers and an increase in container manufacturing costs.

[0005] The present invention aims to reduce the height and width of a glass plate package containing large glass plates, widen the gap between the glass plate package and the inner wall of a container, and improve workability when transporting the glass plate package into and out of a container. [Means for solving the problem]

[0006] The present invention, which has been invented to solve the above problems, is a glass plate package including a glass plate laminate formed by alternately stacking a plurality of glass plates and a plurality of packaging buffer sheets in a vertical position, a bottom plate supporting a bottom surface of the glass plate laminate, a back plate supporting a back surface of the glass plate laminate, a base portion for fixing the bottom plate and the back plate, and a buffer plate disposed between the glass plate laminate and the back plate, and is characterized in that an upper end of the back plate is lower than an upper end of the buffer plate in a direction along the vertical side of the glass plates. With this configuration, the height and width of the glass plate package can be reduced, and the gap between the glass plate package and the inner wall of the container can be widened. This improves the workability during loading and unloading.

[0007] In the above configuration, the base preferably has a groove at the bottom into which the claws of a hand lift can be inserted. A forklift is generally used to transport glass sheet packages. However, a forklift is not suitable for precision work, and it is preferable to use a hand lift, which is easier to operate. The claws of the hand lift are thicker than those of a forklift, since they are equipped with a lifting mechanism. By providing a groove at the bottom of the pallet deep enough to insert the claws of the hand lift, it becomes possible to transport the glass sheet packages using the hand lift.

[0008] In the above-mentioned configuration, the glass plate preferably has a size of 2900 mm×3300 mm or more. With such a configuration, even a large glass plate can be accommodated in the container.

[0009] In the above configuration, the thickness of the glass plate is preferably 0.2 mm or more and 2 mm or less. When the thickness of the glass plate is 0.2 mm or more, the glass plate is easy to handle. On the other hand, when the thickness of the glass plate is 2 mm or less, the height and width of the glass plate package can be reduced even when a large number of glass plates are packed.

[0010] In the above-mentioned configuration, it is preferable that an upper end of the back plate is lower than an upper end of the glass plate in a direction along the vertical side of the glass plate. With such a configuration, it is possible to more reliably widen the gap between the glass plate package and the inner wall of the container.

[0011] In the above-mentioned configuration, it is preferable that the upper end of the buffer plate is higher in the vertical direction than the upper end of the glass plate located at the backmost side of the glass plate laminate and lower than the upper end of the glass plate located at the frontmost side of the glass plate laminate. With such a configuration, the glass plate laminate can be stably supported, and the buffer plate does not protrude from the glass plate laminate in the vertical direction, thereby suppressing the height and width of the glass plate package.

[0012] In the above-mentioned configuration, it is preferable that the packaging cushioning sheet protrudes above the buffer plate and hangs down to the rear side. The packaging cushioning sheet is stacked in a state protruding above the glass plate so that it can be used as a grip when removing the packaging cushioning sheet in the unpacking process. The protruding packaging cushioning sheet hangs down to the rear side, thereby reducing the height of the glass plate package.

[0013] In the above configuration, in the method for opening a glass plate package in which the glass plates are taken out one by one, it is preferable to support the packing cushioning sheet hanging down on the rear side with a packing cushioning sheet support jig and then take out the glass plates one by one. When the glass plates are taken out one by one during opening, the packing cushioning sheets are also taken out one by one and discarded. When the packing cushioning sheet located at the front is taken out while the packing cushioning sheet is hanging down on the rear side, the packing cushioning sheet may get caught on a corner of the glass plate, and the removal of the packing cushioning sheet may fail. By supporting the packing cushioning sheet hanging down on the rear side with the packing cushioning sheet support jig, the packing cushioning sheet is prevented from getting caught on the corner of the glass plate, and the removal of the packing cushioning sheet may be prevented. Effect of the Invention

[0014] According to the present invention, it is possible to reduce the height and width of a glass plate package containing large glass plates, widen the gap between the glass plate package and the inner wall of a container, and improve workability when transporting the glass plate package in and out of a container. [Brief description of the drawings]

[0015] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 2 is an enlarged front view of the upper part of the glass package. [Figure 4] FIG. 2 is a front cross-sectional view of a glass sheet package housed in a container. [Diagram 5]FIG. 2 is a side cross-sectional view of a glass sheet package housed in a container. [Figure 6] 1 is a front view of a glass plate package with a cushioning sheet support jig attached to a pallet. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, one embodiment of a glass plate package 1 according to the present invention will be described with reference to the accompanying drawings.

[0017] As shown in Fig. 1 and Fig. 2, a glass sheet package 1 includes a pallet 2 and a glass sheet laminate 3. The glass sheet laminate 3 is placed in a vertical position on the inclined pallet 2. Here, the X direction, Y direction, and Z direction shown in each drawing are mutually perpendicular directions. The X direction and Y direction are horizontal directions, and the Z direction is a vertical direction. The dimension of the glass sheet package 1 in the X direction is defined as a depth D, the dimension in the Y direction is defined as a width W, and the dimension in the Z direction is defined as a height H.

[0018] The pallet 2 has a bottom plate 21 that supports the bottom surface of the glass plate laminate 3, a back plate 22 that supports the back surface of the glass plate laminate 3, a buffer plate 23 that is sandwiched between the back plate 22 and the glass plate laminate 3, and a base portion 24 that fixes the bottom plate 21 and the back plate 22. The contact surface of the bottom plate 21 with the glass plate laminate 3 (bottom receiving surface 211) and the contact surface of the back plate 22 with the glass plate laminate 3 (back receiving surface 221) form a substantially right angle, and the bottom receiving surface 211 and the horizontal plane, and the back receiving surface 221 and the vertical plane form a predetermined inclination angle.

[0019] The bottom plate 21 is made of, for example, stainless steel, but the contact surface with the glass plate laminate 3 is preferably made of a material that has both moderate cushioning properties and mechanical strength and has a high friction coefficient with respect to the glass plate G. For example, foamed polypropylene can be used as such a material. The back plate 22 is made of, for example, stainless steel. The base portion 24 is made of stainless steel. The bottom plate 21, the back plate 22, and the base portion 24 are made of two-phase stainless steel, which has excellent specific strength, so that the pallet 2 can be made lighter. By making the pallet 2 lighter, the glass plate package 1 can be made lighter, and the workability when transporting the glass plate package 1 using a hand lift can be improved. In this embodiment, the mass of the glass plate package 1 is about 5500 kg at most.

[0020] The bottom of the base 24 has two grooves 241 along the X direction for inserting the claws of a hand lift (not shown). The depth of the grooves 241 is preferably 150 mm to 200 mm, more preferably 170 mm to 190 mm, and even more preferably 185 mm to 190 mm. The thickness of the claws of a forklift used to transport the glass sheet package 1 is generally about 50 mm, but the thickness of the claws of a hand lift is about 150 mm, and the pallet 2 optimized for transportation using a forklift cannot be transported by a hand lift. The interval and width between the grooves 241 are determined according to the dimensions of the hand lift used, and for example, the interval is 1050 mm and the width is 350 mm. The grooves 241 are formed over the entire area of ​​the base 24 in the X direction, and the claws of the hand lift support the entire area or multiple points of the glass sheet package 1 in the X direction, so that the glass sheet package 1 can be transported stably and the workability can be improved.

[0021] As shown in FIG. 3, the glass plate laminate 3 is formed by laminating a plurality of packaging buffer sheets S between a plurality of glass plates G. The packaging buffer sheets S are laminated on the rearmost side and the frontmost side of the glass plate laminate 3. The glass plate G is rectangular or square, and the dimensions of the vertical and horizontal sides are preferably 2200 mm x 2500 mm or more, more preferably 2600 mm x 3000 mm or more, and even more preferably 2900 mm x 3300 mm or more. The thickness dimension of the glass plate G is preferably 0.2 mm or more and 2 mm or less, more preferably 0.2 mm or more and 1 mm or less, and even more preferably 0.3 mm or more and 0.7 mm or less. The number of glass plates G constituting the glass plate laminate 3 is preferably 100 sheets or more and 500 sheets or less, more preferably 200 sheets or more and 450 sheets or less, and even more preferably 300 sheets or more and 400 sheets or less.

[0022] The upper end of the back plate 22 is lower than the upper end of the buffer plate 23 in the direction along the vertical side of the glass plate G. The height difference L1 between the upper end of the back plate 22 and the upper end of the buffer plate 23 in the direction along the vertical side of the glass plate G is preferably 5 mm or more and 20 mm or less, and more preferably 10 mm or more and 15 mm or less. This makes it possible to reduce the height H and width W of the glass plate package. In addition, the buffer plate 23 is preferably formed of a material with high elasticity such as foamed resin. For example, a plate-shaped body of foamed polypropylene or polyethylene can be used as such a material.

[0023] It is preferable that the upper end of the back plate 22 is lower than the upper end of the glass plate G in the direction along the vertical side of the glass plate G. The height difference L2 between the upper end of the back plate 22 and the upper end of the glass plate G in the direction along the vertical side of the glass plate G is preferably 3 mm or more and 15 mm or less, more preferably 5 mm or more and 10 mm or less. This makes it possible to reduce the height H and width W of the glass plate package 1.

[0024] In the vertical direction, the upper end of the buffer plate 23 is preferably higher than the upper end of the glass plate G located at the backmost position of the glass plate laminate 3 and lower than the upper end of the glass plate G located at the frontmost position of the glass plate laminate 3. This allows the glass plate laminate 3 to be stably supported by the buffer plate 23, and prevents the buffer plate 3 from protruding vertically upward from the glass plate laminate 3, thereby making it possible to restrict the height and width of the glass plate package 1.

[0025] The packing cushioning sheets S are laminated alternately with the glass sheets G to prevent damage to the glass sheets G due to contact between the glass sheets G. Furthermore, by forming the packing cushioning sheets S using a material with appropriate elasticity, the glass sheets G are less likely to be scratched even if foreign matter such as glass powder remains on the surface of the glass sheets G. Examples of such materials that can be used include slip paper and foamed resin sheets. Note that in this embodiment, slip paper is used.

[0026] The upper part of the packaging cushioning sheet S protrudes above the glass plate G in order to be used as a gripping margin when removing the packaging cushioning sheet S in the unpacking process. The dimension L3 of the protruding part in the direction along the vertical side of the glass plate is preferably 30 mm to 70 mm, more preferably 40 mm to 60 mm. If the dimension of the protruding part is smaller than this, the gripping margin when adsorbing and holding the packaging cushioning sheet S in the unpacking process is small, and the vacuum adsorption pad cannot stably adsorb and hold it. On the other hand, if the dimension of the protruding part is larger than this, the amount of hanging down to the back side becomes large, and the hanging part of the packaging cushioning sheet S cannot be sufficiently supported in the unpacking process. Since the upper end of the back plate 22 is lower than the upper end of the glass plate G and the upper end of the buffer plate 23 is higher than the upper end of the glass plate G, the part of the protruding part protruding above the upper end of the buffer plate 23 hangs down to the back side due to its own weight. 3, the state in which the packing cushioning sheet S is supported by the back plate 22 and the buffer plate 23 is shown by a two-dot chain line. Compared to the case in which the protruding portion of the packing cushioning sheet S is supported, by making the packing cushioning sheet S hang down on the back side, the height H and width W of the glass plate package 1 can be reduced.

[0027] As shown in Figs. 4 and 5, the glass sheet package 1 is accommodated in the container 4 so that the horizontal side direction of the glass sheet G coincides with the longitudinal direction of the container 4. The inside of the container 4 has a bottom surface 41, a top surface 42, a first side surface 43, a second side surface 44, a third side surface 45, and a door portion 46. The height of the inside of the container 4 (the distance between the bottom surface 41 and the top surface 42) is about 2700 mm, and the width of the inside of the container 4 (the distance between the first side surface 43 and the second side surface 44) is about 2300 mm. The depth of the inside of the container 4 (the distance between the third side surface 45 and the door portion 46) is determined by various standards in a number of dimensions, and is, for example, 12000 mm. Depending on the depth D of the glass sheet package 1 and the depth inside the container 4, the number of glass sheet packages 1 accommodated may be one or more.

[0028] The vertical sides of the glass plates G extend so as to follow the diagonal of a rectangle formed by a cross section perpendicular to the X-axis direction of the container 4. Here, the angle formed by the vertical sides of the glass plates G and the diagonal is preferably 10° or less, and more preferably 5° or less. This allows efficient use of the space inside the container 4. In this embodiment, the height inside the container 4 is about 2700 mm, and the width inside the container 4 is about 2300 mm, so that the glass plates G are inclined at about 40° from the Z direction. When the glass plate package 1 is manufactured at this inclination angle, the workability and stability during stacking of the glass plates G are good.

[0029] 6 shows a front view of the glass plate package 1 when the packing buffer sheet support jig 5 is attached. The packing buffer sheet support jig 5 lifts and supports the sagging packing buffer sheet S by inserting the support part 51 between the packing buffer sheet S and the back plate 22 and fixing the fixing part 52 to the back plate 22 and the base part 24. The depth D of the glass plate package 1 is determined according to the dimensions of the glass plate G to be packaged, and may be 3 m or more in some cases. For this reason, the packing buffer sheet support jig 5 may be divided into multiple units in the X direction so that it can be installed by only one worker. When multiple workers install the packing buffer sheet support jig 5, one unit may be used without being divided.

[0030] Next, a method of opening the glass plate package 1 and taking out the glass plates G one by one will be described. The support part 51 is inserted between the packing buffer sheet S hanging down on the rear side of the glass plate package 1 and the back plate 22 to support the hanging packing buffer sheet S. In this state, the fixing part 52 is fixed to the back plate 22 and the base part 24. The vacuum suction pad of the packing buffer sheet disposal device (not shown) suctions and holds the packing buffer sheet S located at the front of the glass plate package 1, transports it to a packing buffer sheet disposal place (not shown) and discards it. Next, the vacuum suction pad of the glass plate conveying device (not shown) suctions and holds the glass plate G located at the front of the glass plate package 1, and conveys it to the next process. Hereafter, the disposal of the packing buffer sheet S and the conveyance of the glass plate G are repeated until a predetermined number of glass plates G are taken out. When all the glass plates constituting the glass plate package 1 have been conveyed, the packing buffer sheet S located at the rearmost position is discarded and the packing buffer sheet support jig 5 is removed.

[0031] According to the above-described method, it is possible to reduce the height H and width W of the glass plate package 1 in which a large glass plate G is packed, to widen the gap between the glass plate package 1 and the inner wall of the container 4, and to improve the workability when transporting the glass plate package 1 in and out of the container.

[0032] The present invention is not limited to the configuration of the above embodiment, nor is it limited to the above-mentioned effects and advantages. Various modifications of the present invention are possible without departing from the spirit and scope of the present invention.

[0033] In the above embodiment, an interleaf paper is used as the material of the packaging cushioning sheet S, but the present invention is not limited to this. A foamed resin sheet or a non-foamed resin sheet may also be used.

[0034] In the above embodiment, the packing buffer sheet support jig 5 is detachable from the pallet 2, but this is not limited to the above. The packing buffer sheet support jig 5 may be integrated with the pallet 2. In this case, the packing buffer sheet support jig 5 is movable on the pallet 2, and is retracted to a position that does not increase the height H and width W of the glass plate package 1 when the package is carried in and out of the container 4, and when the package is stored in the container 4.

[0035] In the above embodiment, after the glass plate package 1 is opened, the glass plate G is sucked by the vacuum suction pad and transported, but this is not limiting. The glass plate G may be clamped by a mechanical chuck and transported.

[0036] In the above embodiment, after the glass plate package 1 is opened, the packing cushioning sheet S is sucked by the vacuum suction pad and transported, but the present invention is not limited to this. The packing cushioning sheet S may be clamped by a mechanical chuck and transported.

[0037] In the above embodiment, the upper end of the back plate 22 is lower than the upper end of the glass plate G in the direction along the vertical side of the glass plate G, but this is not limited to this. The upper end of the glass plate G may be at the same height as the upper end of the back plate 22 or lower than the upper end of the back plate 22. [Industrial Applicability]

[0038] INDUSTRIAL APPLICABILITY The present invention can be suitably used for improving the work efficiency when a glass sheet package in which large glass sheets are packed is carried in and out of a container. [Explanation of symbols]

[0039] 1 Glass plate package 2 Palettes 21 Bottom plate 22 Back plate 23 Buffer plate 24 Base 241 Groove 3 Glass plate laminate 4. Containers 5. Packing cushion sheet support jig G Glass plate S Packing cushioning sheet

Claims

1. A glass plate laminate obtained by alternately stacking a plurality of glass plates and a plurality of packaging buffer sheets in a vertical position; A glass plate package including a pallet having a bottom plate supporting a bottom surface of the glass plate laminate, a back plate supporting a back surface of the glass plate laminate, a base portion for fixing the bottom plate and the back plate, and a buffer plate disposed between the glass plate laminate and the back plate, In a direction along the vertical side of the glass plate, an upper end of the back plate is lower than an upper end of the buffer plate, A glass plate package, characterized in that an upper end of the back plate is lower than an upper end of the glass plate in a direction along a vertical side of the glass plate.

2. A glass plate laminate obtained by alternately stacking a plurality of glass plates and a plurality of packaging buffer sheets in a vertical position; A glass plate package including a pallet having a bottom plate supporting a bottom surface of the glass plate laminate, a back plate supporting a back surface of the glass plate laminate, a base portion for fixing the bottom plate and the back plate, and a buffer plate disposed between the glass plate laminate and the back plate, In a direction along the vertical side of the glass plate, an upper end of the back plate is lower than an upper end of the buffer plate, a glass plate package having an upper end, in a vertical direction, higher than an upper end of the glass plate located at the backmost position of the glass plate laminate and lower than an upper end of the glass plate located at the frontmost position of the glass plate laminate.

3. 3. The glass sheet package according to claim 1, wherein the base portion has a groove at a bottom thereof into which a claw of a hand lift can be inserted.

4. 4. The glass plate package according to claim 1, wherein the glass plate has a size of 2900 mm×3300 mm or more.

5. 5. The glass plate package according to claim 1, wherein the glass plate has a thickness of 0.2 mm or more and 2 mm or less.

6. The packaging cushioning sheet protrudes upward from the cushioning plate, 6. The glass sheet package according to claim 1, wherein the cushioning sheet hangs down on the rear surface side.

7. A method for unpacking a glass plate package according to claim 6, comprising the steps of: A method for opening a glass plate package, comprising the steps of supporting the cushioning sheet hanging down on the rear side with a cushioning sheet supporting jig and then removing the glass plates one by one.

8. A glass plate laminate obtained by stacking a plurality of glass plates and a plurality of packaging buffer sheets alternately in a vertical position; A pallet including a bottom plate supporting a bottom surface of the glass plate laminate, a back plate supporting a rear surface of the glass plate laminate, a base portion for fixing the bottom plate and the back plate, and a buffer plate disposed between the glass plate laminate and the back plate, In a direction along the vertical side of the glass plate, an upper end of the back plate is lower than an upper end of the buffer plate, The packaging cushioning sheet protrudes upward from the cushioning plate, The method for unpacking a glass plate package includes removing the glass plates one by one from the glass plate package, the packaging buffer sheet being hung down on the rear side, A method for opening a glass plate package, comprising the steps of supporting the cushioning sheet hanging down on the rear side with a cushioning sheet supporting jig and then removing the glass plates one by one.

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