Method and apparatus for manufacturing glass plate packaging.

Abstract

This system allows for high-speed transport of laminated structures consisting of glass plates and protective sheets while suppressing packaging defects in the glass plate packaging. [Solution] The method for manufacturing a glass plate package comprises a transport step of transporting a laminate 3, which consists of a glass plate 1 and a protective sheet 2 stacked on top of each other, using a loading device 5, and a loading step of loading the laminate 3 onto a pallet 4 using the loading device 5. The protective sheet 2 has protruding portions 2a and 2b that extend outwards from the outer circumference of the glass plate 1. The loading device 5 comprises suction parts 9 and 10 and a clamping part 11. In the transport step, the glass plate 1 and the protruding portions 2a and 2b are suctioned by the suction parts 9 and 10, and the protruding portion 2a is clamped by the clamping part 11 while the laminate 3 is transported. In the loading step, the clamping part 11 releases the gripping of the protruding portion 2a, and the glass plate 1 and the protruding portions 2a and 2b are suctioned by the suction parts 9 and 10 while the laminate 3 is loaded onto the pallet 4.

Description

Technical Field

[0001] The present invention relates to a method and an apparatus for manufacturing a glass sheet package.

Background Art

[0002] When storing or transporting glass sheets, a glass sheet package in which glass sheets and protective sheets are alternately laminated on a pallet may be used. The glass sheet package may be such that the glass sheets and the protective sheets are laminated in a vertical posture (substantially vertical posture) on a pallet for vertical posture, or the glass sheets and the protective sheets are laminated in a horizontal posture (substantially horizontal posture) on a pallet for horizontal posture.

[0003] For example, Patent Document 1 discloses that in the manufacturing process of a glass sheet package, while conveying a laminate in which a glass sheet and a protective sheet are stacked, the laminate is loaded onto a pallet by a holding portion of a transfer device (loading device). In the state of the laminate, the protective sheet has an overhanging portion that protrudes from the outer periphery of the glass sheet.

[0004] Furthermore, the same document discloses that in order to shorten the packaging time, the laminate is conveyed at high speed. Specifically, in order to eliminate problems such as the protective sheet of the laminate falling off when the laminate is conveyed at high speed, in addition to adsorbing the overhanging portions of the glass sheet and the protective sheet by the suction portion of the holding portion, it is disclosed that the overhanging portion of the protective sheet is clamped by the clamping portion of the holding portion.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, if the laminate is loaded onto a pallet while the protruding portions of the glass plate and protective sheet are held in place by the suction part and the protruding portions of the protective sheet are held in place by the clamping part, the following problems may occur.

[0007] In other words, the clamping parts are positioned on both the front and back sides of the protruding portion of the protective sheet in order to clamp it. As a result, the clamping parts that are holding the protruding portion may interfere with the protective sheet already loaded on the pallet, potentially causing the protective sheet to shift position or curl up. Such shifting position or curling of the protective sheet can lead to packaging defects in the glass plate packaging.

[0008] The present invention aims to suppress packaging defects in glass plate packaging while transporting a laminate consisting of a glass plate and a protective sheet at high speed. [Means for solving the problem]

[0009] (1) The present invention, devised to solve the above problems, is a method for manufacturing a glass plate package comprising a transport step of transporting a laminate of glass plates and protective sheets stacked on top of each other using a loading device, and a loading step of loading the laminate onto a pallet using a loading device, wherein the protective sheet has an overhang portion that protrudes from the outer circumference of the glass plate, the loading device comprises a suction portion and a clamping portion, in the transport step the laminate is transported with the glass plate and overhang portion being suctioned by the suction portion and the overhang portion being clamped by the clamping portion, and the loading step comprising a first step of releasing the clamping of the overhang portion by the clamping portion, and a second step of loading the laminate onto a pallet with the glass plate and overhang portion being suctioned by the suction portion while the clamping portion has released the overhang portion.

[0010] In this manner, during the transport process, the laminate is transported with the suction part adsorbing the glass plate and the protruding part, and the clamping part holding the protruding part. As a result, the laminate is securely held during the transport process, enabling high-speed transport of the laminate. On the other hand, during the loading process, after the clamping part releases its grip on the protruding part, the laminate is loaded onto the pallet with the suction part adsorbing the glass plate and the protruding part. As a result, when loading the laminate, the clamping part has already released its grip on the protruding part, so interference between the clamping part and the protective sheet already loaded on the pallet can be suppressed. Therefore, it is possible to transport the laminate at high speed while suppressing packaging defects of the glass plate packaging.

[0011] (2) In the configuration of (1) above, in the first step, it is preferable to move the clamping part that has released the gripping of the protruding part from the clamping position in which the protruding part can be gripped to a retracted position that is further away from the pallet than the clamping position.

[0012] In this way, even if the number of glass plates and protective sheets already loaded on the pallet is zero or small, the clamping part will retract to the retracted position, making it less likely to interfere with the pallet.

[0013] (3) In the configuration of (1) above, in the first step, if the number of glass plates and protective sheets loaded on the pallet is less than or equal to a predetermined number, the clamping part that has released the gripping of the protruding portion may be moved from the clamping position in which the protruding portion can be gripped to a retracted position further away from the pallet than the clamping position. If the number of glass plates and protective sheets loaded on the pallet exceeds a predetermined number, the clamping part that has released the gripping of the protruding portion may be left open and waiting at the clamping position.

[0014] In this configuration, even when the number of glass plates and protective sheets already loaded on the pallet is zero or small (first half of the loading process), the clamping part retracts to the retracted position, making it less likely for the clamping part to interfere with the pallet. On the other hand, when the number of glass plates and protective sheets already loaded on the pallet becomes sufficiently large (second half of the loading process), a sufficient distance is secured between the clamping part and the pallet. Therefore, even if the clamping part, which has released the gripping of the protruding portion, is left in the clamping position as in the above configuration, it becomes less likely for the clamping part to interfere with the pallet. In this case, there is also the advantage that manufacturing efficiency can be improved by omitting the operation of retracting the clamping part to the retracted position in the second half of the loading process and simplifying the operation of the clamping part.

[0015] (4) In any of the configurations (1) to (3) above, it is preferable that in the transport process, each of the two opposing portions of the protruding portion that are opposite each other via the glass plate is held simultaneously by the suction portion and the clamping portion, and in the second process, each of the two opposing portions of the protruding portion is held by the suction portion.

[0016] In this way, during the conveying process, each of the two opposing protruding sections is securely held by the suction section and the clamping section. Furthermore, during the loading process (second process), the two opposing protruding sections are continuously held by the suction section even after the clamping section releases its grip. Therefore, the protective sheet remains stable even after the clamping section releases its grip.

[0017] (5) The present invention, devised to solve the above problems, is a manufacturing apparatus for glass plate packaging, comprising a loading device for loading a laminate of glass plates and protective sheets onto a pallet while transporting it, wherein the protective sheet has an overhang portion that protrudes from the outer circumference of the glass plate, and the loading device comprises a suction portion for adsorbing the glass plate and the overhang portion, a clamping portion for gripping the overhang portion, and a retraction mechanism for retracting the clamping portion, which has released the gripping of the overhang portion, from a clamping position capable of gripping the overhang portion to a retraction position further away from the pallet than the clamping position.

[0018] By doing so, the same operational effects as those of the corresponding configuration already described can be enjoyed.

Advantages of the Invention

[0019] According to the present invention, it is possible to suppress packaging defects of a glass plate package while high-speed transporting a laminate in which a glass plate and a protective sheet are stacked.

Brief Description of the Drawings

[0020] [Figure 1] It is a side view showing the overall configuration of a manufacturing method and a manufacturing apparatus of a glass plate package according to a first embodiment of the present invention. [Figure 2] It is a perspective view showing a laminate in a horizontal posture. [Figure 3] It is a perspective view showing a holding portion in a vertical posture. [Figure 4] It is a front view showing an example of a holding mode of a laminate by a holding portion in a vertical posture. [Figure 5] It is a plan view showing a state where a clamping portion is located at a clamping position in a holding portion in a vertical posture. [Figure 6] It is a plan view showing a state where a clamping portion is located at a retracted position in a holding portion in a vertical posture. [Figure 7] It is a side view showing a state where a holding portion has stopped at a first stop position in a loading step. [Figure 8] It is a side view showing a state where a holding portion has stopped at a second stop position in a loading step. [Figure 9] It is a plan view showing a state of a holding portion in a vertical posture in the first half of a loading step included in a manufacturing method of a glass plate package according to a second embodiment of the present invention. [Figure 10] It is a plan view showing a state of a holding portion in a vertical posture in the second half of a loading step.

Modes for Carrying Out the Invention

[0021] Embodiments of the present invention will be described below with reference to the accompanying drawings. In each embodiment, corresponding components will be denoted by the same reference numerals, and redundant explanations may be omitted. When only a part of the configuration is described in each embodiment, the configuration of other embodiments described earlier can be applied to the other parts of that configuration. Furthermore, not only the combinations of configurations explicitly stated in the description of each embodiment, but also the configurations of multiple embodiments can be partially combined, even if not explicitly stated, as long as there are no particular problems with the combination.

[0022] (First Embodiment) As shown in Figure 1, the manufacturing apparatus for a glass plate package according to the first embodiment of the present invention includes a loading device 5 that transports and loads a laminate 3, which consists of a glass plate 1 and a protective sheet 2, onto a pallet 4. In this embodiment, an example is given in which multiple glass plates 1 and protective sheets 2 are stacked alternately in a vertical position on the pallet 4 for packaging.

[0023] The pallet 4 includes a bottom support portion 4a that supports the stacked glass plates 1 and protective sheets 2 from the bottom side, and a rear support portion 4b that supports the stacked glass plates 1 and protective sheets 2 from the rear side.

[0024] The loading device 5 transports the laminated body 3 from the supply station S1 where it is supplied to the loading station S2 where the pallet 4 is placed. At the loading station S2, the loading device 5 loads the laminated body 3 onto the pallet 4. By repeatedly loading the laminated body 3 onto the pallet 4, multiple layers of glass plates 1 and protective sheets 2 are stacked alternately.

[0025] As shown in Figure 2, the laminate 3 supplied to the supply station S1 consists of a rectangular glass plate 1 and a rectangular protective sheet 2 that is larger than the glass plate 1, which are separated and stacked on top of each other.

[0026] Glass plate 1 is formed by methods such as the overflow downdraw method, the downdraw method, or the float method. The thickness of glass plate 1 is exaggerated in the illustration, but is, for example, 0.3 to 1.1 mm. The size of the glass plate is, for example, 2000 mm × 2300 mm to 3400 mm × 3700 mm.

[0027] The protective sheet 2 is made of, for example, laminated paper or resin. If the protective sheet 2 is made of resin, it may be foamed resin or non-foamed resin. The thickness of the protective sheet 2 is exaggerated in the illustration, but is, for example, 0.1 to 0.5 mm.

[0028] In the laminated state 3, the protective sheet 2 has overhang portions that protrude from the outer circumference of the glass plate 1. In this embodiment, the overhang portion has a first overhang portion (opposing portion) 2a that protrudes from each of the two opposing sides 1a of the glass plate 1, and a second overhang portion 2b that protrudes from one of the remaining two opposing sides 1b of the glass plate 1. The sides of the protective sheet 2 on which no overhang portion is formed may be in the same position as the sides of the glass plate 1, as in this embodiment, and the glass plate 1 may be configured to protrude from the protective sheet 2. When stacked vertically on the pallet 4, the first overhang portion 2a protrudes from the left and right sides of the glass plate 1, and the second overhang portion 2b protrudes from the top side of the glass plate 1. When stacked horizontally on the pallet 4, the protective sheet 2 may have overhang portions that protrude from all four sides of the glass plate 1.

[0029] The overhang dimension L1 of the first overhang section 2a is, for example, 40 to 150 mm, and the overhang dimension L2 of the second overhang section 2b is, for example, 40 to 80 mm.

[0030] The supply station S1 is supplied with a horizontally oriented laminate 3, in which a horizontally oriented glass plate 1 is stacked on a horizontally oriented protective sheet 2. Specifically, the horizontally oriented protective sheet 2 is placed on a predetermined mounting base 6 located at the supply station S1, with the first main surface 2x of the protective sheet 2 facing upwards and the second main surface 2y facing downwards. The horizontally oriented glass plate 1 is placed on this protective sheet 2, with the first main surface 1x of the glass plate 1 facing upwards and the second main surface 1y facing downwards. In other words, the second main surface 1y of the glass plate 1 and the first main surface 2x of the protective sheet 2 are in contact with each other. Note that instead of placing a horizontally oriented laminate 3 at the supply station S1, a vertically oriented laminate 3 may also be placed.

[0031] As shown in Figures 3 to 6, the loading device 5 includes a holding section 7 for holding the stacked body 3.

[0032] The holding part 7 is attached to the tip of a support part (not shown), such as a robot arm. The posture and position of the holding part 7 can be adjusted by the support part.

[0033] The holding part 7 comprises a base body 8, a first suction part 9, a second suction part 10, and a clamping part 11.

[0034] The base body 8 is composed of a lattice-shaped frame. Multiple suction parts 9, 10 and multiple clamping parts 11 are arranged on one side of the base body 8.

[0035] The first adsorption part 9 adsorbs the first main surface 1x of the glass plate 1 contained in the laminate 3. The first adsorption part 9 is attached to the substrate 8 via a rod-shaped support 12.

[0036] The second adsorption part 10 adsorbs the first main surface 2x of the first protruding part 2a and the second protruding part 2b of the protective sheet 2 included in the laminate 3. The second adsorption part 10 is attached to the base 8 via a rod-shaped support 13.

[0037] The clamping portion 11 clamps the first main surface 2x and the second main surface 2y of the first protruding portion 2a of the protective sheet 2 included in the laminate 3 from both sides. The clamping portion 11 consists of a pair of claw portions 11a and 11b. Of the pair of claw portions 11a and 11b, the movable claw portion 11a, which is driven by a driving means (not shown) such as a cylinder, opens and closes, and clamps or releases the first protruding portion 2a between itself and the fixed claw portion 11b. In this embodiment, with the first protruding portion 2a clamped by the clamping portion 11, the movable claw portion 11a contacts the second main surface 2y of the first protruding portion 2a, and the fixed claw portion 11b contacts the first main surface 2x of the first protruding portion 2a.

[0038] When the clamping portion 11 is closed, the movable claw portion 11a and the fixed claw portion 11b extend approximately parallel to the first protruding portion 2a (see the state shown by the solid line in Figure 5). On the other hand, when the clamping portion 11 is open, the movable claw portion 11a opens approximately 90 degrees relative to the fixed claw portion 11b (see the state shown by the dashed line in Figure 5).

[0039] In this embodiment, the clamping portion 11 is attached to the base 8 via a retraction mechanism 14 consisting of a cylinder, a slider, or the like. The retraction mechanism 14 switches between a state in which the clamping portion 11 is located in a clamping position P1 capable of clamping the first protruding portion 2a (see the state shown by the solid and dashed lines in Figure 5 and the state shown by the dashed line in Figure 6) and a state in which the clamping portion 11 is located in a retraction position P2 that is further away from the pallet 4 than the clamping position P1 (see the state shown by the solid line in Figure 6). In this embodiment, the linear movement of the retraction mechanism 14 causes the clamping portion 11 to move back and forth between the clamping position P1 and the retraction position P2. When the clamping portion 11 is located in the clamping position P1 and clamps the first protruding portion 2a, the entire protective sheet 2 is held on substantially the same plane. Furthermore, when the clamping portion 11 is retracted to the retracted position P2, the clamping portion 11 releases its grip on the first protruding portion 2a in advance, so that the retraction of the clamping portion 11 does not cause bending of the first protruding portion 2a.

[0040] As shown in Figure 5, when the clamping portion 11 is in the clamping position P1, the movable claw portion 11a is located on the second main surface 2y side (pallet 4 side) of the first protruding portion 2a, and the fixed claw portion 11b is located on the first main surface 2x side (opposite side of pallet 4) of the first protruding portion 2a. On the other hand, as shown in Figure 6, when the clamping portion 11 is in the retracted position P2, both the movable claw portion 11a and the fixed claw portion 11b are located on the first main surface 2x side (opposite side of pallet 4) of the first protruding portion 2a. Note that in the loading station S2, the position of the movable claw portion 11a when the clamping portion 11 is open is closer to the pallet 4 than the position of the movable claw portion 11a when the clamping portion 11 is closed. However, when the clamping portion 11 is in the retracted position P2, even when the clamping portion 11 is in the open position, the movable claw portion 11a is located on the first main surface 2x side (opposite side of pallet 4) of the first protruding portion 2a.

[0041] Next, a method for manufacturing glass plate packaging using the above-described manufacturing apparatus will be explained.

[0042] As shown in Figure 1, this manufacturing method comprises a transport step in which the stacked body 3 is transported from the supply station S1 to the loading station S2 by the loading device 5, and a loading step in which the stacked body 3 is loaded onto the pallet 4 at the loading station S2 by the loading device 5.

[0043] In the transport process, first, the stacked body 3, placed on the mounting platform 6 of the supply station S1, is held by the holding part 7 of the loading device 5 (see Figure 4). Specifically, the glass plate 1 is held by the first suction part 9 of the holding part 7. Meanwhile, the first protruding portion 2a of the protective sheet 2 is held by the second suction part 10 of the holding part 7 and also held by the clamping part 11 of the holding part 7. The second protruding portion 2b of the protective sheet 2 is held by the second suction part 10 of the holding part 7.

[0044] In this embodiment, the first protruding portion 2a is adsorbed by the second adsorption portion 10 at multiple locations spaced apart along the edge 1a of the glass plate 1. At the same time, the first protruding portion 2a is clamped by the clamping portion 11 at multiple locations spaced apart along the edge 1a of the glass plate 1 (three locations in the illustrated example). On the other hand, the second protruding portion 2b is adsorbed by the second adsorption portion 10 at multiple locations spaced apart along the edge 1b of the glass plate 1. The second protruding portion 2b is not clamped by the clamping portion 11.

[0045] Here, it is preferable that the number of locations where the second suction part 10 adsorbs the first protruding part 2a is greater than the number of locations where the clamping part 11 clamps the first protruding part 2a. Furthermore, it is preferable that locations where the second suction part 10 adsorbs the first protruding part 2a are provided on both sides of the locations where the clamping part 11 clamps the first protruding part 2a in the direction along the edge 1a of the glass plate 1. In this way, as will be described later, even after the clamping part 11 releases the first protruding part 2a, it becomes easier to stabilize the posture of the protective sheet 2 by adsorption by the second suction part 10 alone.

[0046] Next, during the process of transporting the laminated body 3 held by the holding unit 7 from the supply station S1 to the loading station S2, the orientation of the holding unit 7 is changed from a horizontal to a vertical orientation. As a result, the orientation of the laminated body 3 held by the holding unit 7 is also changed from a horizontal to a vertical orientation. Specifically, with the orientation of the holding unit 7 and the laminated body 3 changed to a vertical orientation, the second protruding portion 2b, which is adsorbed by the second suction portion 10, is positioned at the upper end, and the first protruding portion 2a, which is held by the second suction portion 10 and the clamping portion 11, is positioned at both ends in the width direction (both ends in the horizontal direction). Furthermore, when the laminated body 3 held by the holding unit 7 is transported to the loading station S2, the protective sheet 2 is positioned closer to the pallet 4 than the glass plate 1.

[0047] During the transport process, when the stacked body 3 held by the holding unit 7 reaches the loading station S2, the stacked body 3 held by the holding unit 7 is temporarily stopped at a first stopping position P3 located a predetermined distance (for example, 300 mm) away from the pallet 4 (see Figure 7).

[0048] As shown in Figures 6 and 7, in the loading process, first, at the first stop position P3, the clamping portion 11 releases its grip on the first protruding portion 2a. With the clamping portion 11 released from gripping the first protruding portion 2a, it remains in the open position and is retracted from the clamping position P1 to the retracted position P2 by the retraction mechanism 14.

[0049] Next, as shown in Figure 8, with the open clamping portion 11 retracted to the retracted position P2, the laminated body 3 is brought closer to the loading position P5 of the pallet 4 while the glass plate 1, the first protruding portion 2a, and the second protruding portion 2b are held in place by the first suction portion 9 and the second suction portion 10. In this embodiment, the laminated body 3 is brought closer to the second stopping position P4, which is slightly above the loading position P5 of the pallet 4 (for example, 2 mm to 50 mm) and then stopped.

[0050] Subsequently, at the second stopping position P4, the suction of the first suction unit 9 and the second suction unit 10 is released. As a result, the holding unit 7 completely releases the stacked body 3, and the stacked body 3 falls from the second stopping position P4 to the loading position P5. Consequently, the stacked body 3 is loaded onto the loading position P5 of the pallet 4.

[0051] The holding unit 7, which has loaded the laminated body 3 onto the pallet 4, returns to the supply station S1 and repeats the above operation. This produces a glass plate package in which glass plates 1 and protective sheets 2 are alternately loaded onto the pallet 4. The loading position P5 corresponds to the position of the frontmost glass plate 1 loaded on the pallet 4. Therefore, as the number of glass plates 1 and protective sheets 2 loaded on the pallet 4 increases, the loading position P5 gradually moves away from the rear support unit 4b.

[0052] In this way, during the transport process, the clamping portion 11 securely holds the protective sheet 2 by clamping the first protruding portion 2a, allowing the laminate 3 to be transported at high speed. On the other hand, during the loading process, after releasing the clamping portion 11 from the first protruding portion 2a, the laminate 3 is loaded onto the pallet 4 with the glass plate 1, the first protruding portion 2a, and the protruding portion 2b being held in place only by the first suction portion 9 and the second suction portion 10. As a result, interference between the clamping portion 11 and the protective sheet 2 already loaded on the pallet 4 can be suppressed. Therefore, it is possible to transport the laminate 3 at high speed while suppressing packaging defects in the glass plate packaging.

[0053] If the travel distance from the supply station S1 to the first stopping position P3 in the transport process is D1 (mm) and the travel speed is V1 (mm / second), and the travel distance from the first stopping position P3 to the second stopping position P4 in the loading process is D2 (mm) and the travel speed is V2 (mm / second), then D1 / D2 is, for example, 10 to 100, and V1 / V2 is, for example, 2 to 50, preferably 5 to 30.

[0054] Furthermore, in this embodiment, when the laminate 3 is loaded onto the pallet 4, the clamping portion 11 is retracted to the retracted position P2, thus reliably preventing the clamping portion 11 from interfering with the pallet 4 (for example, the rear support portion 4b or other pallet components).

[0055] (Second embodiment) The manufacturing method of the glass plate packaging according to the second embodiment differs from that of the first embodiment in the operation of the clamping portion 11 during the loading process.

[0056] In detail, in this embodiment, as shown in Figure 9, if the number of glass plates 1 and protective sheets 2 already loaded on the pallet 4 is less than or equal to a predetermined number (first half of the loading process), the laminate 3 is loaded onto the pallet 4 with the clamping portion 11, which has released the clamping of the first protruding portion 2a, retracted from the clamping position P1 to the retracted position P2. On the other hand, as shown in Figure 10, if the number of glass plates 1 and protective sheets 2 already loaded on the pallet 4 exceeds a predetermined number (second half of the loading process), the laminate 3 is loaded onto the pallet 4 with the clamping portion 11, which has released the clamping of the first protruding portion 2a, remaining open and waiting at the clamping position P1 without being retracted.

[0057] In this way, during the first half of the loading process, when the number of glass plates 1 and protective sheets 2 already loaded on the pallet 4 is small, the clamping portion 11, which has released its grip on the first protruding portion 2a, retracts to the retracted position P2. Therefore, even during the first half of the loading process, it is possible to reliably prevent the clamping portion 11 from interfering with the pallet 4 (for example, the rear support portion 4b or other pallet components).

[0058] On the other hand, in the latter half of the loading process, the number of glass plates 1 and protective sheets 2 already loaded onto the pallet 4 increases, and the loading position P5 (second stopping position P4) moves a certain distance away from the rear support portion 4b of the pallet 4. Therefore, even if the clamping portion 11 is left in the open state with the first protruding portion 2a released from being clamped, it is unlikely that the clamping portion 11 will interfere with the pallet 4. For this reason, in this embodiment, in the latter half of the loading process, the clamping portion 11 is left in the open state with the first protruding portion 2a released from being clamped, and is left in the clamping position P1. This omits the operation of moving the clamping portion 11 from the clamping position P1 to the retracted position P2, thereby simplifying the operation of the clamping portion 11.

[0059] Furthermore, the present invention is not limited to the configuration of the above embodiments, nor is it limited to the effects described above. The present invention can be modified in various ways without departing from the spirit of the invention.

[0060] In the above embodiment, the case in which the clamping portion 11 clamps the first protruding portions 2a formed at both ends in the width direction of the protective sheet 2 has been described, but it is not limited to this. The clamping portion 11 may also clamp the second protruding portion 2b formed at the upper end of the protective sheet 2. In this case, the clamping portion 11 may clamp only the second protruding portion 2b, or it may clamp both the first protruding portion 2a and the second protruding portion 2b.

[0061] In the above embodiment, when the clamping portion 11 is in the open state, the movable claw portion 11a is described as opening approximately 90 degrees relative to the fixed claw portion 11b, but it is not limited to this. When the clamping portion 11 is in the open state, the movable claw portion 11a may open 270 degrees or more relative to the fixed claw portion 11b. In this way, in the clamping portion 11 which is in the open state at the clamping position P1, both the fixed claw portion 11b and the movable claw portion 11a are located on the first main surface 2x side (opposite side from the pallet 4) of the first protruding portion 2a. In addition, in the clamping portion 11 which is in the open state at the clamping position P1, the movable claw portion 11a does not protrude significantly outward in the width direction of the first protruding portion 2a. Therefore, in the first half of the loading process, it is possible to prevent the clamping portion 11 from interfering with the pallet 4 without having to move the clamping portion 11, which has released the clamping of the first protruding portion 2a, from the clamping position P1 to the retracted position P2.

[0062] In the above embodiment, during the transport and / or loading process, the holding portion 7 (second suction portion 10 and clamping portion 11) may be configured to apply tension to the protective sheet 2 in order to suppress wrinkles in the protective sheet 2.

[0063] In the above embodiment, the case in which the glass plate 1 and protective sheet 2 are loaded in a vertical position (approximately vertical position) on a vertical pallet 4 was described. However, the present invention can also be applied to the case in which the glass plate 1 and protective sheet 2 are loaded in a horizontal position (approximately horizontal position) on a horizontal pallet. The vertical position refers to, for example, a position in which the inclination angle of the loaded glass plate 1 with respect to the vertical surface is 0° to 60°. The horizontal position refers to, for example, a position in which the inclination angle of the loaded glass plate 1 with respect to the vertical surface is 0° or more and less than 30°.

[0064] In the above embodiment, the stacked body 3 is positioned vertically at the first stop position P3 and the second stop position P4, but the stacked body 3 may be positioned parallel to the rear support portion 4b of the pallet 4. Alternatively, the stacked body 3 may be positioned vertically at the first stop position P3 and parallel to the rear support portion 4b of the pallet 4 at the second stop position P4. [Explanation of Symbols]

[0065] 1 glass plate 2 protective sheets 3. Laminate 4 pallets 4a Base support 4b Back support part 5. Loading device 6. Mounting platform 7 Holding part 8 Base 9 First suction part 10 Second suction part 11 Clamping part 11a Movable claw part 11b Fixed claw part 14 Evacuation mechanism P1 Clamping position P2 Evacuation position P3 First stop position P4 Second stop position P5 Loading position S1 Supply Station S2 Loading Station

Claims

1. A method for manufacturing a glass plate packaging comprising a transport step of transporting a laminate of glass plates and protective sheets stacked on top of each other using a loading device, and a loading step of loading the laminate onto a pallet using the loading device, The protective sheet has an overhang portion that extends beyond the outer periphery of the glass plate, The aforementioned loading device comprises a suction part and a clamping part, In the transport process, the laminate is transported while the glass plate and the protruding portion are adsorbed by the adsorption portion and the protruding portion is held by the clamping portion. The method for manufacturing a glass plate packaging is characterized in that the loading step comprises a first step of releasing the gripping of the protruding portion by the gripping portion, and a second step of loading the laminate onto the pallet while the gripping of the protruding portion by the gripping portion is released and the glass plate and the protruding portion are held in place by the suction portion.

2. The method for manufacturing a glass plate packaging body according to claim 1, wherein in the first step, the clamping part that has released the clamping of the protruding part is moved from a clamping position capable of clamping the protruding part to a retracted position further away from the pallet than the clamping position.

3. In the first step, If the number of glass plates and protective sheets loaded on the pallet is less than or equal to a predetermined number, the clamping part that has released the gripping of the protruding portion is moved from the clamping position in which the protruding portion can be gripped to a retracted position further away from the pallet than the clamping position. The method for manufacturing a glass plate packaging body according to claim 1, wherein, if the number of glass plates and protective sheets already loaded on the pallet exceeds a predetermined number, the clamping portion that has released the clamping of the protruding portion is kept in the clamping position in an open state.

4. In the conveying process, each of the two opposing portions of the protruding portion that are opposite each other via the glass plate is simultaneously held by the suction portion and the clamping portion. The method for manufacturing a glass plate packaging body according to any one of claims 1 to 3, wherein in the second step, each of the two opposing portions of the protruding portion is held by the suction portion.

5. A manufacturing apparatus for glass plate packaging, which includes a loading device that transports a laminate of glass plates and protective sheets stacked on top of each other and loads it onto a pallet, The protective sheet has an overhang portion that extends beyond the outer periphery of the glass plate, The aforementioned loading device is The glass plate and the adsorption part that adsorbs the protruding portion, A clamping portion that holds the aforementioned protruding portion, A manufacturing apparatus for glass plate packaging, comprising a retraction mechanism that retracts the clamping portion, which has released the clamping of the protruding portion, from a clamping position capable of clamping the protruding portion to a retraction position further away from the pallet than the clamping position.

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