WO2018008213A1 - Packing device and packing method - Google Patents

Abstract

A packing device (1) has: a pallet (2) capable of loading a plurality of sheets of plate glass (G); and an angle changing mechanism (12) capable of changing the angle of the pallet (2). The angle changing mechanism (12) changes the angle of the pallet (2) within the angle range of 45-90° with respect to the horizontal direction.

Description

Packing apparatus and packing method

The present invention relates to a packing apparatus and a packing method capable of packing and transporting a plurality of plate glasses.

As is well known, in recent years, various types of glass plates represented by glass substrates for flat panel displays (FPD) such as liquid crystal displays and electroluminescence displays have been promoted in size. As an example, in a glass substrate for a liquid crystal display, one side has a length exceeding 2000 mm, and a plate thickness of 0.7 mm or less has become widespread and has become thinner. Since such a large and thin plate glass is easily damaged, it is extremely difficult to handle it when packed and transported. In particular, the packaging form is regarded as important.

Patent Document 1 discloses a packaging container that places and holds a plate glass in a substantially horizontal state. The packing container is disposed on the pedestal, on the pedestal, and placed on the pedestal, between the pedestal and the saucer, a placing plate having a rectangular shape in plan view on which the plate glass is placed, a tray that supports the placing plate A shrinkage absorbing material / elongation absorbing material.

This packing container absorbs vibrations caused by shaking of the pedestal during transportation by the shrinkage absorbing material and the stretch absorbing material, and prevents the displacement of the plate glass to be placed by curving the corner of the mounting plate. To do. The tray that supports the mounting plate is configured by combining a plurality of steel materials (supporting members), and supports the mounting plate in a state where the corners of the mounting plate are deformed. The plurality of plate glasses to be packed are sandwiched between them, and are supported by the mounting plate without any positional deviation while the corner is curved by the corner of the mounting plate.

International Publication No. 2012/099700

When a material that is easily deformed is used for the mounting plate as in a conventional packaging container, minute foreign matters derived from the interleaving paper interposed between the plate glasses are likely to adhere to the plate glass. This is because the part of the mounting plate supported by the steel material in the saucer is deformed by vibration during transportation, and local pressure acts on the steel material part of the saucer, and the part of the plate glass corresponding to the position of this steel material This is because foreign matter is intensively transferred to the surface. The number of foreign substances that adhere in a concentrated manner tends to increase as it is positioned at the bottom of the plurality of stacked glass sheets, and to increase as the glass thickness decreases.

異物 It is difficult to remove the adhered foreign substances in the sheet glass cleaning process after unpacking. If a large number of foreign substances remain attached, there is a risk of causing a circuit abnormality in the manufacturing process of a liquid crystal display, for example.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a packing apparatus and a packing method capable of making it difficult for foreign matters resulting from slip sheets to adhere to sheet glass.

The present invention is intended to solve the above-described problem, and is a packing apparatus having a pallet on which a plurality of plate glasses can be stacked, and an angle changing mechanism capable of changing the angle of the pallet, the angle changing mechanism Is configured to change the pallet within an angle range of 45 ° to 90 ° with respect to the horizontal direction.

The packaging device having the above configuration can adjust the angle of the pallet so as to be in an inclined posture in which the plate glass can be placed by the angle changing mechanism. The pallet can be changed to a vertical posture. By placing the pallet in a vertical posture during conveyance, it is possible to prevent local pressure from acting on the pallet, thereby preventing foreign matter caused by the slip sheet from being concentrated on the plate glass.

In this case, it is desirable that the angle changing mechanism has a hinge part that rotatably supports the pallet and a jack part that rotates the pallet via the hinge part. According to this, the angle of the pallet can be continuously adjusted by the jack portion, and the pallet posture is adjusted so that the angle is suitable for loading according to conditions such as the size and weight of the plate glass to be loaded. Can be adjusted. With the above configuration, even a thin or ultra-thin plate glass having a thickness of 0.7 mm or less can be suitably loaded, transported and unpacked.

The method for packing sheet glass according to the present invention is for solving the above-described problem, and includes a step of loading a plurality of sheet glasses on the pallet with the pallet in an inclined posture, and the inclination of the pallet loaded with the sheet glass. And changing the posture from a vertical posture to carrying it.

According to this, after placing the plate glass in an inclined posture and changing the pallet to a vertical posture and transporting the pallet, it is possible to prevent local pressure from acting on the pallet. Concentrated adhesion of foreign matters due to paper can be prevented.

Further, it is desirable that the method for packing a sheet glass further includes a step of unpacking the pallet from the vertical posture to the inclined posture after the step of conveying the pallet. By changing the pallet to the inclined posture, the plate glass loaded on the pallet can be unloaded appropriately.

According to the present invention, it is possible to make it difficult for foreign matter caused by the slip sheet to adhere to the plate glass.

FIG. 1 is a side view showing a sheet glass packing device. FIG. 2 is a rear view showing a sheet glass packing device. FIG. 3 is a flowchart showing a method for packing plate glass. FIG. 4 is a side view showing a state of the packing device in the loading process. FIG. 5 is a side view showing a state of the packaging device in the loading process. FIG. 6 is a side view showing a state of the packaging device in the fixing step. FIG. 7 is a side view showing a state of the packing device in the transport process. FIG. 8 is a side view showing a state of the packaging device in the unpacking process.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. 1 to 8 show an embodiment of a packing apparatus and a packing method according to the present invention.

As shown in FIGS. 1 and 2, the packaging device 1 includes a pallet 2 that supports the plate glass G and a support frame 3 that rotatably supports the pallet 2.

The pallet 2 is configured to support a plurality of plate glasses G in a standing posture (including an inclined posture). The pallet 2 is supported by the support frame 3 so that the angle θ can be freely adjusted. The pallet 2 includes a frame portion 4, a support plate 5 that is fixed to the frame portion 4, supports the plate glass G, and a receiving portion 6 that supports the lower end portion of the plate glass G in a standing posture. Have.

As shown in FIG. 2, the frame portion 4 is configured as a frame formed by combining, for example, square cylindrical steel materials in a lattice shape. The frame portion 4 is configured in an L shape in a side view and supports the support plate 5 and the receiving portion 6.

The support plate 5 supports a plurality of plate glasses G on one surface side. The support plate 5 is configured by a metal plate, a resin plate, or a plywood plate of a resin plate and a metal plate. In the present embodiment, the support plate 5 is configured by combining foamed polypropylene (elastic modulus 1.5 GPa), hard polyvinyl chloride (elastic modulus 4 GPa), and stainless steel plate (for example, SUS304, elastic modulus 200 GPa). It is not limited to. The support plate 5 is fixed to the frame portion 4 by bolts, screws, or other fixing members. A pair of guide plates 7 that guide the plate glass G to a predetermined position are provided on the side portions of the support plate 5. As shown in FIG. 2, each guide plate 7 is fixed to the frame portion 4.

The receiving portion 6 is configured in a plate shape and is fixed to one end portion of the support plate 5 so as to be perpendicular to the support plate 5. A plurality of rollers 8 for rotating the pallet 2 while supporting the pallet 2 are rotatably provided below the receiving portion 6. In addition, the angle which the receiving part 6 and the support plate 5 make is not limited to 90 degrees.

The support frame 3 is configured in an L shape in a side view, and includes a base portion 9 positioned at a lower portion and a support portion 10 that is erected on the base portion 9 and supports the pallet 2 so as to be rotatable.

As shown in FIG. 1, the base portion 9 has a rail portion 11 for guiding the roller 8 of the pallet 2. The rail part 11 has a guide part 11a for guiding the roller 8 when the pallet 2 rotates. When the pallet 2 rotates, the guide portion 11a is curved in an arc shape and a concave shape in a side view so as to correspond to the arc-shaped locus drawn by the receiving portion 6.

The support unit 10 includes an angle changing mechanism 12 that can change the angle θ of the pallet 2. The angle changing mechanism 12 includes a hinge portion 12a that rotatably supports the pallet 2, and a jack portion 12b that rotates the pallet 2 via the hinge portion 12a. The hinge portion 12a is positioned above the jack portion 12b and supports the frame portion 4 of the pallet 2 so as to be rotatable at a position slightly below the central portion in the vertical direction of the pallet 2.

One end of the jack portion 12 b is rotatably connected to the support portion 10 of the support frame 3, and the other end is rotatably connected to the frame portion 4 of the pallet 2. Although the jack part 12b which concerns on this embodiment is illustrated as a screw type thing, it is not limited to this, You may use an air type, a hydraulic type, and other types.

In addition, although it is preferable that the plate glass G to be packed is 0.7 mm or less in thickness, it is not limited to this. The density of the plate glass G is about 2.0 to 3.0 g / cm ^3, but is not limited to this.

Hereinafter, the packaging method of the plate glass G by the packaging apparatus 1 which concerns on the said structure is demonstrated.

As shown in FIG. 3, the method for packing the plate glass G includes a step of loading the plate glass G on the pallet 2 (loading step) S <b> 1, a step of fixing the plate glass G loaded on the pallet 2 (fixing step) S <b> 2, and fixing. The process mainly includes a process (transport process) S3 for transporting the packaging device 1 after the process S2, and a process (unpacking process) S4 for unpacking the packaging device 1 after the transport process S3.

As shown in FIG. 4, in the loading step S <b> 1, the angle θ of the pallet 2 is fixed at, for example, 72 ° with respect to the horizontal direction by operating the jack portion 12 b of the angle changing mechanism 12. At this time, the pallet 2 moves to a predetermined inclined posture as the roller 8 moves along the guide portion 11 a of the rail portion 11.

When the pallet 2 is fixed in an inclined posture, the glass sheets G are stacked one by one on the support plate 5 and the receiving portion 6. At this time, the interleaf paper P is sandwiched between the glass sheets G. Further, each glass sheet G is guided toward the support plate 5 by the guide plate 7 of the pallet 2 so as not to be displaced. As shown in FIG. 5, when a predetermined number of plate glasses G are stacked on the pallet, the stacking step S1 ends.

When the loading process S1 is completed, the process proceeds to the fixing process S2 as shown in FIG. In this fixing step, a cover sheet 13 for protecting the plate glass G is placed so as to cover the entire plurality of stacked plate glasses G. The cover sheet 13 is made of, for example, a resin sheet, but is not limited to this. Thereafter, the glass sheet G is fixed to the pallet 2 by the binding band 14 from above with the cover sheet 13.

When the fixing step S2 is completed, the process proceeds to the conveying step S3 as shown in FIG. The packaging device 1 changes the pallet 2 to a state where it can be conveyed. That is, the pallet 2 set in the inclined posture in the loading step S1 and the fixing step S2 is changed to a vertical posture by the angle changing mechanism 12. Here, the term “vertical” in the present specification includes a state in which the pallet 2 is slightly inclined in addition to the case where the angle is perpendicular to the horizontal direction (90 °). That is, the vertical posture of the pallet 2 can be set in a range of 85 ° to 90 °. When the posture is changed, the roller 8 of the pallet 2 is lowered along the guide portion 11a of the rail portion 11 to guide the pallet 2 to be in a vertical posture.

When the pallet 2 is changed to the vertical posture, the packing device 1 is loaded onto the transport vehicle and transported to the destination. When arriving at the destination, the packaging device 1 is unloaded from the transport vehicle and then proceeds to the unpacking step S4. As shown in FIG. 8, in the unpacking step S4, first, the pallet 2 in the vertical posture is changed to the inclined posture. In the present embodiment, the inclination angle θ of the pallet 2 is set to 72 ° as in the case of the loading step S1, but is not limited thereto.

When the pallet 2 is in the inclined posture, the binding band 14 and the cover sheet 13 are removed from the plate glass G. Thereby, it will be in the state where the some glass plate G supported by the pallet 2 was exposed. Thereafter, the stacked glass sheets G are lowered from the pallet 2 one by one. When all the plate glasses G are lowered, the unpacking step S4 ends.

According to the packaging device 1 and the packaging method according to the present embodiment described above, when the sheet glass G is loaded on the pallet 2, the loading operation of the sheet glass G on the pallet 2 is facilitated by installing the pallet 2 in an inclined posture. Can be done. Further, since the pallet 2 is in a vertical posture during conveyance, the pressure due to the weight of the plate glass G does not act on the support plate 5. Therefore, local pressure does not act on the plate glass G, and foreign substances resulting from the interleaving paper P are prevented from intensively adhering to the plate glass G.

The inventor conducted a test for confirming the effect of the present invention. In this test, for Comparative Examples 1 and 2 and Examples 1 and 2, the plate glass was packed and transported under predetermined conditions, then unpacked, and the surface was washed. After cleaning, foreign matters remaining on the surface of the plate glass were counted. About the foreign material, the thing of the magnitude | size of 1 micrometer or less was counted using the image inspection apparatus. As evaluation criteria for counting, the number of foreign substances per sheet glass (average) was 100 or less was evaluated as “good”, and the number exceeding 100 was determined as “bad”. In each example, plate glass having a size of 2200 mm × 2500 mm (OA-10G manufactured by Nippon Electric Glass Co., Ltd.) was used. The test results are shown in Table 1 below.

In Example 1, a plate glass having a thickness of 0.7 mm was packed. In this example, the inclination angle of the pallet was set to 72 °, 180 sheets of glass sheets were loaded on the pallet and packed, then the pallet posture was changed to 90 °, and the packing device was transported by the transport truck. The plate glass was transported by loading a packing device packed with the plate glass on a transport truck and traveling 200 km on the same route (hereinafter the same). Thereafter, the pallet was changed to 72 ° again and unpacking was performed.

In Example 2, a plate glass having a thickness of 0.3 mm was packed. In this example, the angle of the pallet was set to 45 °, 420 plate glasses were stacked and packed on the pallet, the pallet posture was changed to 90 °, and the packing apparatus was transported in the same manner as in Example 1. When unpacking, the angle of the pallet was changed to 45 ° again, and then the plate glass was taken out of the pallet.

In Comparative Example 1, a plate glass having a thickness of 0.7 mm was packed. In this example, after the pallet angle was set to 72 ° and 180 plate glasses were stacked and packed, the packing device was transported without changing the pallet posture. After the conveyance, unpacking was performed without changing the pallet inclination angle at 72 °.

In Comparative Example 2, a plate glass having a thickness of 0.4 mm was packed. In this example, the angle of the pallet was set to 45 °, 420 sheets of glass were stacked on the pallet and packed, and then the packing device was conveyed without changing the pallet posture. After conveyance, unpacking was performed without changing the inclination angle of the pallet at 45 °.

As a test result, in Example 1, the average number of foreign matters per sheet glass was 70, which was the best result. In Example 2, the average number of foreign matters was 90, indicating good results. On the other hand, in Comparative Example 1, the average number of foreign matters was 150, and in Comparative Example 2, the average number of foreign matters was 230, and both were evaluated as defective.

According to the above, the pallet is inclined at the time of conveyance, and after loading the plate glass, the plate glass is changed from the inclined posture to the vertical posture, and the packaging device is conveyed while maintaining the vertical posture, thereby attaching to the plate glass. It became clear that the number of remaining foreign substances can be reduced.

In addition, this invention is not limited to the structure of the said embodiment, It is not limited to the above-mentioned effect. The present invention can be variously modified without departing from the gist of the present invention.

In the above embodiment, the example in which the jack portion 12b of the angle changing mechanism 12 is provided at a position below the hinge portion 12a has been shown. However, the present invention is not limited thereto, and the jack portion 12b is disposed above the hinge portion 12a. Also good.

In the above embodiment, the case where the plate glass G is fixed to the pallet 2 by the binding band 14 has been described as an example, but the plate glass G may be fixed to the pallet 2 by an arbitrary method. For example, a pressing member such as a bar-shaped member, a plate-shaped member, or a frame-shaped member may be disposed and fixed to the pallet 2 so as to press the uppermost sheet glass G. In this case, it is preferable to turn the binding band 14 around the pressing member to fix the plate glass G and the pressing member to the pallet 2.

DESCRIPTION OF SYMBOLS 1 Packing apparatus 2 Pallet 12 Angle change mechanism 12a Hinge part 12b Jack part G Sheet glass

Claims (5)

1. A packing apparatus having a pallet capable of stacking a plurality of plate glasses and an angle changing mechanism capable of changing an angle of the pallet,
   The said angle change mechanism is comprised so that the said pallet may be changed in the angle range of 45 to 90 degree with respect to a horizontal direction, The packing apparatus characterized by the above-mentioned.
2. 2. The packaging device according to claim 1, wherein the angle changing mechanism includes a hinge part that rotatably supports the pallet, and a jack part that rotates the pallet via the hinge part.
3. The packaging apparatus according to claim 1 or 2, wherein the thickness of the plate glass is 0.7 mm or less.
4. A plate glass comprising: a step of loading a plurality of plate glasses on the pallet with the pallet in an inclined posture; and a step of transporting the pallet loaded with the plate glasses from the inclined posture to a vertical posture. Packing method.
5. The plate glass packaging method according to claim 4, further comprising a step of unpacking the pallet from the vertical posture to the inclined posture after the step of conveying the pallet.

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