TWI811591B - Glass plate manufacturing method and glass plate package - Google Patents

Abstract

A method of manufacturing a glass plate. The original glass plate 7 and the protective sheet 8 are alternately arranged in an upright position to prepare a laminated body. After taking out the original glass plate 7 and the protective sheet 8 from the laminated body 9, they are placed on the protective sheet 8 with The original glass plate 7 is cut in a state where the original glass plate 7 is placed in a flat position and is divided into the glass plate 13 and the excess portion 14. Then the excess portion 14 is removed from the protective sheet 8, and when the original glass plate 7 is cut, the original glass plate 7 is protected. The shape of one side of the sheet 8 is such that the corner portion 7 d of one side of the original glass plate 7 protrudes from the protective sheet 8 , and the one side is the original glass plate 7 and the protective sheet 8 The upper sides of the two 7 and 8 when in the upright position.

Description

Manufacturing method of glass plate and glass plate package

The present invention relates to an improvement in the form of a protective sheet when an original glass plate is stacked on a protective sheet and a glass plate package having a laminate in which protective sheets and original glass plates are alternately arranged. Improvement of the form of the protective sheet.

In the field of manufacturing glass plates, a glass original plate is sometimes made into a laminated body together with a protective sheet and stored on a pallet or the like, and then the two are taken out to perform various operations. The original glass plate is self-borrowed. Cut out from glass ribbons formed by down draw method or float method. As a specific example of a laminated body, Patent Document 1 discloses that glass plates (original glass plates) and protective sheets are alternately arranged in an upright posture (inclined posture).

Among the various operations performed on the original glass plates taken out one by one from such a laminated body together with the protective sheet, there is an operation performed after changing the posture of both from the upright posture to the flat posture. As a specific example of such an operation, for example, Patent Document 2 discloses that a glass original plate is placed in a flat position on a protective sheet, a scribed line is formed on the upper surface of the glass original plate, and then a scribed line is formed along the scribed line. Break the original glass plate.

In this step of cutting the original glass plate on the protective sheet, sometimes the glass Both ends in the width direction of the original glass plate are cut as excess portions, and the excess portions are removed from the protective sheet after cutting. If such a step is performed, a glass plate as a product can be obtained.

[Prior technical literature]

[Patent Document]

Patent Document 1: Japanese Patent Application Publication No. 2019-104566

Patent Document 2: Japanese Patent Application Publication No. 2017-190255

Furthermore, according to Patent Document 1, in a laminate including an upright glass original plate and a protective sheet, the upper end and both widthwise ends of the protective sheet protrude from both upper corners of the glass original plate. Moreover, the cutting operation disclosed in Patent Document 2 is performed by taking out the two components from such a laminated body in an original state and changing the postures of the two components into a flat posture.

In this situation, a situation may arise in which one of the corners of the original glass plate (when the original glass plate is in an upright position) is damaged during cutting operations such as bending and deformation of the original glass plate. , the upper corner of the original glass plate) puncture protection sheet. Therefore, when the original glass plate is broken along the scribing line, one corner of the original glass plate is caught on the protective sheet, which hinders smooth operation. Furthermore, when the excess portion is lifted and removed from the protective sheet using a holding tool such as an adsorption pad or a holding member after breaking, there is a risk that the corner portion of the excess portion will be caught on the protective sheet, causing the excess portion to fall off from the holding tool. . In addition, even if the self-retaining tool does not come off It may fall off, and sometimes the excess part may be improperly deformed and damaged due to the hook. In this case, the glass powder falls onto the glass plate as the product and adheres to it, which not only reduces the quality of the glass plate but also causes defective products.

From the above viewpoints, an object of the present invention is to prevent a gap between the original glass plate and the protective sheet from easily occurring when the original glass plate and the protective sheet are taken out from a laminated body in which they are alternately arranged in an upright position and then various operations are performed on the original glass plate. Hook to make various operations smoother.

A first aspect of the present invention created to solve the above problems is a method for manufacturing a glass plate, which includes a preparation step of preparing a laminated body in which original glass plates and protective sheets are alternately arranged in an upright posture. ; The taking-out step, after the preparation step, takes out the glass original plate and the protective sheet from the laminated body; the cutting step, after the taking-out step, lays it flat on the protective sheet Cutting the original glass plate with the original glass plate overlapped into a glass plate and an excess portion; and a removing step of removing the excess portion from the protective sheet after the cutting step. part, and in the manufacturing method of the glass plate, in the cutting step, one side of the protective sheet is in a shape such that one corner of the original glass plate is separated from the protective sheet. The glass original plate and the protective sheet are in the upright position, and the one side is the upper side of the original glass plate and the protective sheet when they are in the upright position.

According to this method, a set of glass original plates and protective sheets taken out from a laminated body in which the original glass plate and the protective sheet are alternately arranged in an upright position are overlapped in a flat position. status and execute the cut-off step. When performing the cutting step, one corner of the original glass plate protrudes from the protective sheet, thus preventing one corner of the original glass plate from piercing the protective sheet. The "one side" here refers to the upper side of the original glass plate and the protective sheet when they are laminated in an upright position. In this case, even if the cutting operation performed in the cutting step is an operation that bends and deforms the original glass plate, such as breaking, the original glass plate is prevented from being hooked on the protective sheet on one side, so that the cutting operation can be smoothly performed. change. In addition, in the removal step after the cutting step, the excess portion is lifted up and removed using a holding tool such as an adsorption pad or a holding member, for example. However, in this case, one of the corners of the excess portion (a portion of one of the corners of the original glass plate) is also prevented from being hooked on the protective sheet. This prevents the excess portion from falling off from the holding tool, damage of the excess portion due to improper deformation, adhesion of glass powder on the glass plate as the product, and the like. As a result, inefficient interruption of operations in the cutting step and the removal step is prevented, and the quality of the glass plate as a product is reduced or the occurrence of defective products is suppressed.

In the method, in the preparation step, an upper corner of the protective sheet may be cut off to produce the protective sheet used in the cutting step.

If set in this way, the upper corner of the protective sheet of the laminated body before the preparation step is not cut off, so the entire upper side of the glass original plate can be covered with the protective sheet. Thereby, the upper side of the glass plate can be appropriately protected by the protective sheet during transportation or transportation of the laminated body.

In the above method, the shape of one side of the protective sheet used in the cutting step may be such that one of the product areas in the glass original plate is A corner portion on one side protrudes from the protective sheet.

If set in this way, after the removal step, one of the corners of the glass plate corresponding to the product area of the original glass plate will still protrude from the protective sheet. Thereby, when the glass plate is used as a target for work after the removal step, one corner of the glass plate will not puncture the protective sheet, and the work after the removal step can be smoothly performed.

In this method, in the cutting step, the other side of the protective sheet may be in a form such that the other corner of the glass original plate protrudes from the protective sheet. , and the other side is the lower side of the original glass plate and the protective sheet when they are in the upright position.

If set in this way, it is possible to prevent the corners of the original glass plate from puncturing the protective sheet on the other side. This prevents the other side from making the cutting operation difficult, the excess portion falling off from the holding tool such as the suction pad or the holding member, the excess portion being damaged due to improper deformation, and the glass on the glass plate as the product being prevented. Powder adhesion, etc.

In the method, in the preparation step, a lower corner of the protective sheet may be cut off to produce the protective sheet used in the cutting step.

With this setting, the lower corner of the protective sheet of the laminated body before the preparation step is not cut off, so that the entire lower side of the glass original plate can be covered with the protective sheet. Thereby, the lower side of the glass plate can be appropriately protected by the protective sheet during transportation or transportation of the laminated body.

In the above method, the protective sheet used in the cutting step is The shape of the other side may be a shape in which the corner of the other side of the product area in the glass original plate protrudes from the protective sheet.

If set in this way, after the removal step, the corner portion on the other side of the glass plate corresponding to the product area of the original glass plate will still protrude from the protective sheet. Thereby, when the glass plate is used as a target for work after the removal step, the corner portion on the other side of the glass plate will not puncture the protective sheet, and the work after the removal step can be smoothly performed.

In addition, the following step may be included as a step after the removing step: a separating step of overlapping the protective sheet used in the cutting step of the manufacturing method of the glass plate in a flat position. With the glass plate replacing the original glass plate, the two are conveyed with one of the sides as the front side in the conveying direction, and the traveling directions of the two are different in the middle of the conveying. The end of the glass plate on the front side in the conveyance direction starts to separate the protective sheet, thereby separating the two.

With this setting, the operation of separating the protective sheet from the glass plate can be smoothly performed. That is, when conveying with a glass plate stacked on a protective sheet, if a situation occurs where the corner of the glass plate on the front side in the conveying direction pierces the protective sheet, the traveling directions of the two plates may be changed in the middle of conveying. If they are different, a situation may arise where the glass plate and the protective sheet move in the same direction. As a result, the protective sheet cannot be separated from the glass plate, which may cause problems such as damage to the glass plate. In the method here, the front side of the protective sheet in the conveyance direction is in a form in which the corner portion of the glass original plate on the front side in the conveyance direction is extended. If it is in this form, it is impossible for the original glass plate to move towards the Protective sheet from punctures. In this case, the positions of the corner portions of the original glass plate and the corner portions of the glass plate are only different by removing the excess portion. Therefore, the glass plate is unlikely to be punctured or is less likely to be punctured, which can help to facilitate the operation of separating the protective sheet from the glass plate.

The second aspect of the present invention created to solve the above problems is a glass plate packaging body in which a laminated volume is placed on a packaging pallet. The laminated body is a glass original plate and a protective sheet standing upright. The postures are alternately arranged, and in the glass plate package, the upper side of the protective sheet is in a form such that the upper corner of the glass original plate protrudes from the protective sheet.

According to the glass plate package, the protective sheet and the original glass plate can be taken out in the original state, and after the two are changed from the upright position to the flat position, the original glass plate can be cut and the excess portion can be self-protected. Removal from sheet. Thereby, one corner of one side of the original glass plate will not penetrate the protective sheet, and the same advantages as the above-mentioned situation can be obtained. In addition, if the upper sides of the protective sheet and the glass original plate are set to the front side in the conveyance direction, the operation of separating the protective sheet from the glass plate can also be smoothly performed.

According to the present invention, when the original glass plate and the protective sheet are taken out from a laminated body in which the original glass plate and the protective sheet are alternately arranged in an upright position and then various operations are performed on the original glass plate, hooking between the two is less likely to occur and various operations can be realized. Smoothen.

1: Preparatory steps

2: Take out steps

3: Cutting step

4: Removal steps

5:Separation step

6: Glass plate package

7: Original glass plate

7a: Both ends of the glass original plate in the width direction

7b: Product area of original glass plate

7c: Cut off the reservation line

7d: Corner of one side (upper side) of the original glass plate

7e: One side (upper side) of the original glass plate

7f: The edges on both sides of the width direction of the original glass plate

7g: Corner of one side (upper side) of the product area of the original glass plate

7h: The other side (lower side) of the original glass plate

7i: The corner of the other side (lower side) of the original glass plate

7j: Corner on the other side (lower side) of the product area of the original glass plate

7k: crossed

8:Protective sheet

8a: Protect the missing end edge of one side (upper side) of the sheet

8b: The missing part of one side (upper side) of the protective sheet

8c: Protect the outer edge of the missing part of the sheet

8d: Protect the upper end of the sheet

8e: Protect both ends of the sheet in the width direction

8f: Protect the other side (lower side) of the sheet

8g: The missing part on the other side (lower side) of the protective sheet

8h: Protect the missing end edge of the other side (lower side) of the sheet

8i: Protect the lower end of the missing edge on the other side (lower side) of the sheet

8j: Protect the corner of the other side (lower side) of the sheet

8k: Protect the outer edge of the missing part on the other side (lower side) of the sheet

9: Laminated body

10: Pallets for packaging

10a:Placement surface

11: Loading part

11a: Working surface

12: Knife wheel

13:Glass plate

13a: The end of the glass plate on the front side in the conveyance direction

13b: Corner of one side of the glass plate

13c: The front side of the glass plate in the conveying direction

13d: The side on the rear side of the glass plate in the transport direction

14: redundant part

14a: One corner of the excess part

14b: Corner on the other side of the excess part

15:Transportation conveyor

15a: The end of the conveyor on the front side in the conveying direction

16:Transfer department

17:Roller

18:Conveying roller

B: One side (upper side) of the original glass plate and protective sheet

C: The other side (lower side) of the original glass plate and protective sheet

D: direction

L1~L3, L5, L6: extended dimensions

L4: Stay away from size

FIG. 1 is a flowchart showing a method for manufacturing a glass plate according to an embodiment of the present invention. Figure.

FIG. 2 is a schematic side view showing the glass plate package according to the embodiment of the present invention.

Fig. 3a is a longitudinal sectional front view of the glass plate package cut along line A-A in Fig. 2 .

FIG. 3 b is an enlarged front view of a main part of the glass plate package cut along line A-A in FIG. 2 .

Fig. 4a is a longitudinal sectional front view showing a first other example of the glass plate package according to the embodiment of the present invention.

4 b is an enlarged front view of a main part of a first alternative example of the glass plate package according to the embodiment of the present invention.

Fig. 5a is a longitudinal sectional front view showing a second other example of the glass plate package according to the embodiment of the present invention.

FIG. 5 b is an enlarged front view of a main part of a second alternative example of the glass plate package according to the embodiment of the present invention.

Fig. 6a is a longitudinal sectional front view showing a third alternative example of the glass plate package according to the embodiment of the present invention.

FIG. 6 b is an enlarged front view of a main part of a third alternative example of the glass plate package according to the embodiment of the present invention.

7a is a schematic perspective view showing a state in which a cutting step of the glass plate manufacturing method according to the embodiment of the present invention is performed.

Fig. 7b shows a method for manufacturing a glass plate according to the embodiment of the present invention. A schematic perspective view of the cutting step.

FIG. 8 is a schematic side view showing a state in which a separation step is performed in the method for manufacturing a glass plate according to the embodiment of the present invention.

FIG. 9 is a schematic side view for explaining a problem when performing a separation step in the manufacturing method of a glass plate.

Hereinafter, a manufacturing method of a glass plate and a glass plate package according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1 , the manufacturing method of the glass plate according to this embodiment includes: preparation step 1, preparing a laminated body in which a glass original plate and a protective sheet are alternately arranged in an upright position on a packaging pallet. ; and step 2 of taking out, take out the original glass plate and protective sheet from the laminated body. Furthermore, the manufacturing method includes: cutting step 3, cutting the glass original plate in a state where the glass original plate is overlapped in a flat position on the taken-out protective sheet, and dividing it into the glass plate and the excess portion; removing step 4 , removing excess parts from the protective sheet; and separation step 5, separating the protective sheet from the glass plate.

FIG. 2 is a schematic side view illustrating the glass plate package 6 prepared in the preparation step 1, and FIG. 3a is a schematic front view cut along line A-A in FIG. 2 . As shown in these figures, the glass plate package 6 is a laminate 9 in which original glass plates 7 and protective sheets 8 are alternately arranged in an upright position (more specifically, an inclined position) and are loaded on a packaging pallet. Made up of 10. The original glass plate 7 is formed by cutting a glass ribbon formed by a down-drawing method (for example, an overflow down-drawing method) or a float method along the width direction. As shown in FIG. 3a , both end portions 7a in the width direction of the original glass plate 7 are portions set as redundant portions. The two The end portion 7a is separated from the product region 7b by cutting the glass original plate 7 along the planned cutting line 7c in the cutting step 3.

The glass original plate 7 preferably has a thickness of 100 μm to 2000 μm, and a length of each side of 1500 mm to 4000 mm. The protective sheet 8 is preferably a foamed resin sheet or an unfoamed resin sheet with a thickness of 100 μm to 500 μm, and is made of polyethylene or the like.

Hereinafter, the forms of the protective sheet 8 and the glass original plate 7 will be described. In addition, in the following description, regarding the protective sheet 8 and the glass original plate 7 shown in FIG. 3a-FIG. 6b, the same component is attached|subjected with the same symbol in each figure, respectively. For components marked with the same symbols, detailed explanations are omitted.

The protective sheet 8 shown in FIG. 3a has an upper side configuration in which both corner portions 7d of the upper side of the glass original plate 7 are extended. Specifically, the protective sheet 8 has a rectangular shape as a basic shape and has two upper corners of the rectangular shape missing. Furthermore, the upper corner portion 7d of the rectangular glass original plate 7 protrudes from the missing edge 8a of the upper side of the protective sheet 8. The protruding dimension L1 is preferably 5mm~20mm. In this case, the upper corner portion 7d of the original glass plate 7 is accommodated in the missing portion (the portion marked with a parallel diagonal line of one dot chain line) 8b of the protective sheet 8 shown in FIG. 3b and does not reach the missing portion 8b. Outer edge 8c. Therefore, the upper end portion 8d and the width direction both end portions 8e of the protective sheet 8 respectively protrude from the upper side 7e and the width direction both sides 7f of the glass original plate 7. The protruding dimension L2 from the upper side 7e is preferably 50 mm to 150 mm, and the protruding dimension L3 from the sides 7f on both sides in the width direction is preferably 50 mm to 200 mm. In this case, the upper edge 7e of the original glass plate 7 and the planned cutting line 7c are The formed corner portion 7g (the corner portion on the upper side of the product area 7b) does not protrude from the missing edge 8a on the upper side of the protective sheet 8. The distance L4 from the top of the corner portion 7g to the end edge 8a is preferably 10 mm or less. As shown in Fig. 3a, the lower side 8f of the protective sheet 8 and the lower side 7h of the glass original plate 7 contact or substantially contact the mounting surface 10a of the packaging pallet 10, so these sides are located at the same position or Roughly the same location. In this case, in the illustration, the lower side 8f of the protective sheet 8 contacts the mounting surface 10a, and the lower side 7h of the glass original plate 7 is separated upward from the mounting surface 10a. In other words, the lower end part including the lower side 8f of the protective sheet 8 protrudes from the lower side 7h of the glass original plate 7 . Furthermore, contrary to the illustration, the lower side 8f of the protective sheet 8 may be separated upward from the mounting surface 10a, and the lower side 7h of the glass original plate 7 may be in contact with the mounting surface 10a. In other words, the lower end part including the lower side 7h of the glass original plate 7 may protrude from the lower side 8f of the protective sheet 8.

In this embodiment, in preparation step 1, the corners of the rectangular protective sheet are cut off, thereby missing the corners. Therefore, when the glass plate package 6 is transported or conveyed, the entire upper end portion and the entire width direction both ends of the rectangular protective sheet are separated from the upper side 7e of the glass original plate 7 and the width direction both sides 7f. Stretch out separately. Thereby, the entire area of the original glass plate 7 is covered with the protective sheet, and the original glass plate 7 is appropriately protected.

Furthermore, the corners of the rectangular protective sheet may also be cut off when performing step 2 of taking out, or after taking step 2 and before cutting step 3. The cutting operation can be performed manually by the operator, or can also be performed using a robotic arm or the like. In addition, when producing the laminated body 9, the rectangular protective sheet does not need to be used. Instead, use the protective sheet 8 with missing corners as shown. Furthermore, the missing edge 8 a on the upper side of the protective sheet 8 is in a shape along a straight line in the illustration, but it may also be in a wave shape, a zigzag shape, an arc shape, or the like.

The form of the protective sheet 8 is not limited to the above form, and may be the form shown below. That is, the protective sheet 8 shown in FIG. 4a has not only the two corners on the upper side but also the two corners on the lower side missing. As shown in FIG. 4 b , the lower side of the protective sheet 8 is in such a shape that the lower end of the missing portion (a parallel diagonal line marked with a dotted chain line) 8 g is located near the lower corner 7 i of the original glass plate 7 . In detail, the lower end 8i of the missing edge 8h on the lower side of the protective sheet 8 coincides with or substantially coincides with the top of the corner portion 7i on the lower side of the glass original plate 7. In this case, in the illustration, the lower side 8f of the protective sheet 8 contacts the mounting surface 10a, and the lower side 7h of the glass original plate 7 is away from the mounting surface 10a upward, and further, the protective sheet 8 The missing edge 8 h on the lower side is in contact with the top of the corner portion 7 i on the lower side of the original glass plate 7 . Furthermore, contrary to the illustration, the lower side 8f of the protective sheet 8 may be separated upward from the mounting surface 10a, and the lower side 7h of the glass original plate 7 may contact the mounting surface 10a. In this case, the protection The lower end 8i of the edge 8h of the sheet 8 may be in contact with one side 7f in the width direction of the lower end of the glass original plate 7. In addition, the form of the upper side of this protective sheet 8 is the same as that shown in FIG. 3a and FIG. 3b. In addition, the method of deleting the lower corner of the protective sheet 8, the timing of deletion, and the shape of the edge 8h are the same as the matters described with respect to the upper corner of the protective sheet 8 shown in FIGS. 3a and 3b. same.

The protective sheet 8 shown in FIG. 5 a has an upper side configuration in which both upper corner portions 7 g of the product area 7 b of the glass original plate 7 are extended. because Therefore, as shown in FIG. 5 b , both the upper corner portion 7 d of the glass original plate 7 and the upper corner portion 7 g of the product area 7 b are accommodated in the upper missing portion 8 b of the protective sheet 8 (a parallel diagonal line marked with a dotted chain line). (position) and does not reach the outer edge 8c of the missing portion 8b. The protruding dimension L5 of the upper corner portion 7g of the product area 7b is preferably 1 mm to 10 mm. In this case, as shown in FIG. 5a , the lower side 8f of the protective sheet 8 contacts the mounting surface 10a, and the lower side 7h of the glass original plate 7 is separated upward from the mounting surface 10a. Furthermore, contrary to the illustration, the lower side 8f of the protective sheet 8 may be separated upward from the mounting surface 10a, and the lower side 7h of the glass original plate 7 may be in contact with the mounting surface 10a. Furthermore, in the illustration, the lower corner portion 8j of the protective sheet 8 is not missing, but the lower corner portion 8j may be missing like the protective sheet 8 shown in FIGS. 4a and 4b . Furthermore, the method of deleting the upper corner of the protective sheet 8, the timing of deletion, and the shape of the edge 8a are the same as the matters described with respect to the upper corner of the protective sheet 8 shown in FIGS. 3a and 3b. same.

In addition to the upper side form, the protective sheet 8 shown in FIG. 6a also has a lower side form in which both corner portions 7j on the lower side of the product area 7b of the glass original plate 7 are extended. Therefore, as shown in Fig. 6b, both the lower corner portion 7i of the glass original plate 7 and the lower corner portion 7j of the product area 7b are accommodated in the missing portion 8g (marked with a dotted chain line) on the lower side of the protective sheet 8. (parallel oblique lines) and does not reach the outer edge 8k of the missing portion 8g. The protruding dimension L6 of the lower corner portion 7j of the product area 7b from the end edge 8h is preferably 1 mm to 10 mm. Furthermore, the lower side of the protective sheet 8 may be in a form in which only the lower corner portion 7i of the glass original plate 7 is extended. In this case, the protruding size of the lower corner 7i is preferably 5 mm to 20 mm, and the length from the lower corner 7i to the The distance from the end edge to 8h is preferably 10 mm or less. In the illustration, the shape of the upper side of the protective sheet 8 is the same as the protective sheet 8 shown in FIGS. 5a and 5b . Furthermore, the shape of the upper side of the protective sheet 8 may be the same as the protective sheet 8 shown in FIGS. 3a and 3b . Here, the lower side 8f of the protective sheet 8 and the lower side 7h of the glass original plate 7 are located at the same position or substantially the same position. In this case, in the example shown in FIGS. 6a and 6b , the lower side 8f of the protective sheet 8 contacts the mounting surface 10a, and the lower side 7h of the glass original plate 7 is separated upward from the mounting surface 10a. . Furthermore, contrary to the illustration, the lower side 8f of the protective sheet 8 may be separated upward from the mounting surface 10a, and the lower side 7h of the glass original plate 7 may be in contact with the mounting surface 10a. Furthermore, it may be set as shown below instead. That is, regarding the protective sheet 8 , when the removal step 2 is performed, or after the removal step 2 and before the cutting step 3 , the protective sheet 8 is moved downward relative to the original glass plate 7 . Thereby, not only the upper side 7e of the glass original plate 7 but also the lower side 7h of the glass original plate 7 is reliably covered with the protective sheet 8. The "upper side" and "lower side" described here regarding the protective sheet 8 and the original glass plate 7 mean the upper and lower sides when the protective sheet 8 and the original glass plate 7 are in an upright position. In addition, the method of cutting off the lower corner of the protective sheet 8 and the shape of the edge 8h are the same as those described for the upper corner of the protective sheet 8 shown in FIGS. 3a and 3b.

The removal step 2 is to use a device that can hold the original glass plate 7 and the protective sheet 8 as a set, such as a device with an adsorption pad at the front end to absorb and hold both 7 and 8 or a device with a front end that holds both 7 and 8 . The device of holding member is carried out. Furthermore, these devices take out the glass original plate 7 and the protective sheet 8 from the laminated body 9, and transform the The postures of the glass original plate 7 and the protective sheet 8 are such that the glass original plate 7 is stacked on the protective sheet 8 in a flat position.

7a and 7b are perspective views respectively illustrating the manner in which cutting step 3 is performed. As shown in these figures, in the cutting step 3, the glass original plate 7 is placed on the working surface 11a of the placing portion 11 in a state where the glass original plate 7 is stacked on the protective sheet 8 in a flat position. The placement unit 11 includes, for example, a transfer conveyor, a work pallet or a work flat plate on the conveyor, or the like. In Figure 7a, one side of the original glass plate 7 and the protective sheet 8 indicated by the symbol B is the upper side of the protective sheet 8 and the original glass plate 7 7 and 8 when they are in the upright position. In addition, the other side indicated by the symbol C of the original glass plate 7 and the protective sheet 8 is the lower side of the protective sheet 8 and the original glass plate 7 7 and 8 when they are in the upright posture. The glass original plate 7 and the protective sheet 8 here are taken out from the laminated body 9 explained based on FIGS. 3a and 3b , and the relative positional relationship between the two 7 and 8 is in a state of being aligned in the laminated body 9 . Therefore, in the example shown in FIG. 7a , the other side 8f of the protective sheet 8 and the other side 7h of the glass original plate 7 are located at the same position or substantially the same position, but they may also be the same as those already explained based on FIG. 3a . The appearance is the same. That is, the end portion of the protective sheet 8 including the other side 8f may extend from the other side 7h of the original glass plate 7, or the end portion of the original glass plate 7 including the other side 7h may be It extends from the other side 8f of the protective sheet 8 .

FIG. 7a illustrates a state in which a scribed line along the planned cutting line 7c is formed on the surface (upper surface) of the original glass plate 7. In this embodiment, the scribe wheel 12 is moved along the planned cutting line 7c of the glass original plate 7, thereby forming the scribe line 7k along the planned cutting line 7c. In the legend, the scribed line 7k is drawn from the other side of the original glass plate 7 The lateral side is formed by one of the sides extending over the entire length. Furthermore, the scribed line 7k may be formed in a portion of the original glass plate 7 excluding the other end and one end. Then, bending stress is applied to the area where the scribed line 7k is formed on the original glass plate 7 and the original glass plate 7 is broken along the scribed line 7k. As a result, the original glass plate 7 is divided into glass plates (products) as shown in FIG. 7b. glass plate) 13 and excess portion 14.

Then, perform removal step 4. In the removal step 4 , after the excess portion 14 is held by a holding tool such as an adsorption pad or a holding member, the holding tool lifts and moves the excess portion 14 , thereby removing the excess portion 14 from the protective sheet 8 . Furthermore, instead, in the removal step 4 , the operator may manually remove the excess portion 14 from the protective sheet 8 using a tool or the like.

The effects when cutting step 3 and removing step 4 are performed are as follows. That is, in the cutting step 3 , as shown in FIG. 7 a , one corner portion 7 g of the product area 7 b of the glass original plate 7 does not protrude from one of the missing end edges 8 a of the protective sheet 8 . Therefore, one end of the planned cutting line 7 c is supported from below by the protective sheet 8 . Furthermore, in the illustration, the other end of the planned cutting line 7 c is also supported from below by the protective sheet 8 . Thereby, when the cutter wheel 12 is gradually moved along the planned cutting line 7c of the glass original plate 7, it will not be adversely affected by the step difference, and the scribing line 7k can be accurately formed. This effect can be obtained similarly when the other end of the protective sheet 8 protrudes from the other side 7 h of the glass original plate 7 . In addition, when the other end of the glass original plate 7 protrudes from the other side 8f of the protective sheet 8, by connecting the other end of the glass original plate 7 and one of the The parts except the ends form a scribe line 7k, so that the get the same effect.

When the glass original plate 7 is broken, the glass original plate 7 must be bent and deformed in order to cause bending stress to act on the area where the scribe line 7k is formed. On the other hand, one corner part 7d of the glass original plate 7 protrudes from the missing edge 8a of one side of the protective sheet 8. Therefore, there is no risk that the corner 7d of one side of the original glass plate 7 will puncture the protective sheet 8, and no hooking will occur between the two 7 and 8 on one side, so that defects that hinder the breaking operation can be avoided. condition. Furthermore, when the excess portion 14 is removed from the protective sheet 8 in the removal step 4, as shown in FIG. No hooking occurs between the parts) and the protective sheet 8. This prevents the excess portion 14 from falling off from the holding tool, damage of the excess portion 14 due to improper deformation, adhesion of glass powder on the glass plate 13, and the like. As a result, inefficient interruption of the operations in the cutting step 3 and the removal step 4 is avoided, and deterioration in the quality of the glass plate 13 and the occurrence of defective products are suppressed. Furthermore, in the illustration, the other side 7h of the glass original plate 7 and the other side 8f of the protective sheet 8 are located at the same position. Therefore, the other side corner 7i of the glass original plate 7 and the protective sheet 8 are at the same position. No hooking occurs between them. This action and effect can be obtained similarly when the other end of the glass original plate 7 protrudes from the other side 8f of the protective sheet 8 . Therefore, in these situations, it is possible to avoid undesirable conditions that hinder the breaking operation of the original glass plate 7 or the removal operation of the excess portion 14 on the other side.

FIG. 8 illustrates a state in which the separation step 5 is performed after the removal step 4 . In the separation step, the transport conveyor 15 transports the protective sheet 8 and the glass plate 13 in the direction of arrow D. When both 7 and 8 reach the front side of the conveyor 15 in the conveying direction, At the time point of the end portion 15 a, the glass plate 13 is still traveling in the direction of arrow D and is transferred to the transfer portion 16 on the front side of the transfer conveyor 15 in the transfer direction. On the other hand, the traveling direction of the protective sheet 8 changes downward due to the suction force of the negative pressure. In this embodiment, the transfer part 16 includes a plurality of rollers 17 arranged along a straight line in the direction of arrow D. In addition, although the structure that causes the suction force of negative pressure to act on the protective sheet 8 is not shown in the figure, the conveyance roller 18 disposed at the end 15 a on the front side in the conveyance direction of the conveyor 15 and its lower portion apply the suction force of the negative pressure. Acts only on protective sheet 8. Here, the "front side in the conveyance direction" refers to the side from which the original glass plate 7 in step 4 is removed. In the separation step 5 , the traveling directions of the glass plate 13 and the protective sheet 8 are different during transportation in the direction of arrow D, so that the protective sheet 8 is separated from the end 13 a of the glass plate 13 on the front side in the transportation direction. At this time, if the corner 13b (refer to FIG. 7b) of the glass plate 13 on the front side in the conveyance direction punctures the protective sheet 8, it will be difficult to make the traveling directions of the glass plate 13 and the protective sheet 8 different. Therefore, for example, as shown in FIG. 9 , the end 13 a of the glass plate 13 on the front side in the conveyance direction may collide with the roller 17 of the transfer unit 16 together with the protective sheet 8 , and the glass plate 13 may be damaged. In this case, although the corner 13b on the front side of the glass plate 13 in the conveyance direction does not protrude from the missing edge 8a on the front side of the protective sheet 8, since one of the corners 7d of the original glass plate 7 extends from this end With the edge 8a protruding, the puncture is less likely to occur. As a result, the operation of separating the protective sheet 8 from the glass plate 13 can be appropriately performed in the aspect shown in FIG. 8 .

The above description from the cutting step 3 to the separation step 5 takes as an example the case where, when the cutting step 3 is performed, the glass original plate 7 and The protective sheet 8 remains in its original state It is taken out and placed on the working surface 11a of the placing part 11, but other than this, the following aspects may also be exemplified. That is, in the first alternative example, when the cutting step 3 is executed, both 7 and 8 are taken out from the laminated body 9 described based on FIGS. 4 a and 4 b in the original state, and placed on the placement part. 11 working surface 11a. With this setting, it is less likely that the other corner portion 7i of the glass original plate 7 will be caught with the protective sheet 8 when the original glass plate 7 is broken. In addition, when the excess portion 14 is removed, the other corner portion 14b (see FIG. 7b ) is less likely to be caught on the protective sheet.

In the second alternative example, when cutting step 3 is performed, both 7 and 8 are taken out from the laminated body 9 described based on FIGS. 5 a and 5 b while maintaining the original state, and are placed on the placement part 11 The working surface 11a. If set in this way, in the separation step 5 , the corner portion 13 b on the front side in the conveyance direction of the glass plate 13 protrudes from the missing edge 8 a on the front side in the conveyance direction of the protective sheet 8 . This reliably prevents the front end 13 a of the glass plate 13 in the conveyance direction from puncturing the protective sheet 8 , so that the operation of separating the protective sheet 8 from the glass plate 13 can be performed without any hindrance.

In the third alternative example, when the cutting step 3 is executed, the glass original plate 7 and the protective sheet 8 are placed on the working surface 11a of the placing part 11 in the manner explained based on FIGS. 6 a and 6 b. If set in this way, when the original glass plate 7 is broken, when the excess portion 14 is removed, and when the protective sheet 8 is separated from the glass plate 13, not only the same advantages as the second alternative example can be obtained, but also the following can be obtained. advantages. That is, when the cutting step 3 and the removing step 4 are performed, not only the corner portion 7d on one side of the original glass plate 7 but also the corner portion 7i on the other side of the original glass plate 7 is reliably prevented from puncturing the protective sheet. 8. In this case, in the aspect shown in Figure 6a and Figure 6b, in order to maintain the When the protective sheet 8 is moved downward as described above, during the cutting step 3 and the removing step 4, not only the end surface of the original glass plate 7 along one of the edges 7e is protected by the protective sheet 8 is protected, and the end surface of the original glass plate 7 along the side 7h on the other side is also protected by the protective sheet 8. In addition, during the execution of the separation step 5, not only the end surface of the glass plate 13 along the side 13c on the front side in the transportation direction is protected by the protective sheet 8, but also the end surface of the glass plate 13 along the side 13d on the rear side in the transportation direction is protected by the protection sheet 8. Protective sheet 8 protection.

Furthermore, the protective sheet 8 in the above embodiment is a protective sheet having a basic shape of a rectangle with a predetermined portion missing or a predetermined portion of the rectangular protective sheet cut off. However, the shape of the protective sheet 8 is not limited to this. For example, the protective sheet 8 may be formed into a circular, oval, or other polygonal shape by performing the deletion or cutting. In such a shape, it is also necessary to make the corners or products of the original glass plate 7 The corners of the area 7b and further the corners of the glass plate 13 protrude in the same manner as described above.

In addition, in the above embodiment, the lower side 8f of the protective sheet 8 contacts or substantially contacts the placement surface 10a of the packaging pallet 10, but may be separated from the placement surface 10a. In this case, the lower side of the protective sheet 8 has a shape in which the lower two corners 7i of the glass original plate 7 are extended, and the lower two corners of the product area 7b of the glass original plate 7 are formed. The shape of the part 7j is extended. In this structure, for example, in order to ensure the protrusion dimension L6 of the lower corner portion 7j of the product area 7b from the end edge 8h, a lower missing portion 8g of the protective sheet 8 may be provided.

In addition, in the protective sheet 8 of Figures 4a and 4b and Figures 6a and 6b, The upper missing portion 8b and the lower missing portion 8g are provided independently, but the upper missing portion 8b and the lower missing portion 8g may be connected. That is, when the original glass plate 7 is in an upright position, the protective sheet 8 can also be provided with missing portions along the up-down direction, so that the two upper corner portions 7d and the lower two corner portions of the original glass plate 7 can be aligned. 7i extends. Alternatively, when the glass original plate 7 is in an upright position, the protective sheet 8 can also be provided with a missing portion along the up and down direction, so that the upper two corners 7g and the lower side of the product area 7b of the glass original plate 7 can be The two corners 7j extend out.

In addition, although the separation step is performed after the cutting step (first cutting step) and the removing step (first removing step) in the above embodiment, a second cutting step may be provided between the first removing step and the separating step. breaking step and second removal step. In the second cutting step, the upper end portion and the lower end portion when the glass original plate 7 is in the upright position are cut off as excess portions. In the second removal step, the excess portion generated in the second cutting step is removed from the protective sheet.

In addition, in the above embodiment, one glass plate is cut out from the original glass plate, but a plurality of glass plates may be cut out from the original glass plate. In this case, for example, it is sufficient to provide a dividing step between the removing step and the separating step, and in the dividing step, the glass plate is divided into a plurality of glass plates.

6: Glass plate package

7: Original glass plate

7a: Both ends of the glass original plate in the width direction

7b: Product area of original glass plate

7c: Cut off the reservation line

7d: Corner of one side (upper side) of the original glass plate

7f: The edges on both sides of the width direction of the original glass plate

7g: Corner of one side (upper side) of the product area of the original glass plate

7h: The other side (lower side) of the original glass plate 7

8:Protective sheet

8a: Protect the missing end edge of one side (upper side) of the sheet

8d: Protect the upper end of the sheet

8e: Protect both ends of the sheet in the width direction

8f: Protect the other side (lower side) of the sheet

9: Laminated body

10: Pallets for packaging

10a:Placement surface

Claims (11)

A method for manufacturing a glass plate, which includes a cutting step of cutting the original glass plate with the original glass plate overlapped in a flat position on a protective sheet, and separating the original glass plate into a glass plate and an excess portion, wherein the glass The method of manufacturing a plate is characterized in that, in the cutting step, one side of the protective sheet is shaped so that one corner of the original glass plate protrudes from the protective sheet. form. The method for manufacturing a glass plate according to claim 1, wherein the step before the cutting step includes a preparation step of preparing a laminate in which the original glass plate and the protective sheet are alternately arranged in an upright position. It is formed; the taking-out step is to take out the original glass plate and the protective sheet from the laminated body. The manufacturing method of a glass plate according to claim 2, wherein said one side is an upper side of the original glass plate and the protective sheet when they are in the upright position. The manufacturing method of a glass plate according to claim 2 or claim 3, wherein in the preparation step, an upper corner of the protective sheet in the upright position is cut off, and all the parts used in the cutting step are produced. protective sheet. The manufacturing method of a glass plate according to any one of claims 1 to 3, wherein the shape of one side of the protective sheet used in the cutting step is such that the glass original plate is in a One corner of the product area protrudes from the protective sheet. The production of a glass plate according to any one of claims 1 to 3 The manufacturing method, wherein in the cutting step, the other side of the protective sheet is in a form such that a corner portion of the other side of the glass original plate protrudes from the protective sheet. The manufacturing method of a glass plate according to claim 6, wherein the other side is the lower side of the original glass plate and the protective sheet when they are in the upright position. The manufacturing method of a glass plate according to claim 6, wherein the step before the cutting step includes: a preparation step of preparing a laminated body in which the original glass plate and the protective sheet are alternately arranged in an upright position. Thus, in the preparation step, the lower corner of the protective sheet in the upright position is cut off to produce the protective sheet used in the cutting step. The manufacturing method of a glass plate according to claim 6, wherein the shape of the other side of the protective sheet used in the cutting step is such that the other side of the product area in the original glass plate The corners protrude from the protective sheet. A method for manufacturing a glass plate, characterized in that the step after the cutting step in the method for manufacturing a glass plate according to any one of claims 1 to 3 includes a removing step, from the protecting step Removing the excess portion from the sheet includes, as a step after the removing step, a separation step, and the cutting step in the method for manufacturing a glass plate according to any one of claims 1 to 3. When the glass plate is superimposed on the protective sheet used in the invention in a flat position instead of the original glass plate, both are conveyed with one side being the front side in the conveying direction. Halfway through, the two The protective sheet is separated from the end of the glass plate on the front side in the conveyance direction, thereby separating the two. A glass plate package in which a laminated volume is placed on a packaging pallet. The laminated body is formed by alternately arranging original glass plates and protective sheets in an upright position, and the glass plate package has It is characterized in that the upper side of the protective sheet is in a shape such that an upper corner of the glass original plate protrudes from the protective sheet.