CN114728433B - Method for manufacturing glass plate - Google Patents
Method for manufacturing glass plate Download PDFInfo
- Publication number
- CN114728433B CN114728433B CN202080079987.4A CN202080079987A CN114728433B CN 114728433 B CN114728433 B CN 114728433B CN 202080079987 A CN202080079987 A CN 202080079987A CN 114728433 B CN114728433 B CN 114728433B
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- China
- Prior art keywords
- glass
- sheet
- protective sheet
- plate
- corner
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- 239000011521 glass Substances 0.000 title claims abstract description 308
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000001681 protective effect Effects 0.000 claims abstract description 222
- 238000005520 cutting process Methods 0.000 claims description 69
- 238000000926 separation method Methods 0.000 claims description 18
- 230000002950 deficient Effects 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 13
- 230000036544 posture Effects 0.000 description 35
- 230000000694 effects Effects 0.000 description 5
- 238000012856 packing Methods 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000003280 down draw process Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000006124 Pilkington process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
- B28D7/04—Accessories specially adapted for use with machines or devices of the preceding groups for supporting or holding work or conveying or discharging work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
- B65D7/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by shape
- B65D7/04—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by shape of curved cross-section, e.g. cans of circular or elliptical cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/48—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for glass sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Packaging Frangible Articles (AREA)
- Wrapping Of Specific Fragile Articles (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
A method for manufacturing a glass sheet, wherein a laminate is produced by alternately arranging glass raw plates (7) and protective sheets (8) in a vertical posture, wherein after the glass raw plates (7) and the protective sheets (8) are taken out from the laminate (9), the glass raw plates (7) are cut and broken into glass plates (13) and unnecessary portions (14) in a state in which the glass raw plates (7) are superimposed on the protective sheets (8) in a horizontal posture, and then the unnecessary portions (14) are removed from the protective sheets (8), and wherein, when the glass raw plates (7) are cut, the form of one side of the protective sheets (8) is such that the corner portions (7 d) of one side of the glass raw plates (7) protrude from the protective sheets (8), and the one side is the upper side of the two glass raw plates (7) and the protective sheets (8) when the glass raw plates (7) and the protective sheets (8) are in the vertical posture.
Description
Technical Field
The present invention relates to an improvement in the form of a protective sheet when a glass original plate is stacked on the protective sheet and the protective sheet is operated, and an improvement in the form of the protective sheet in a glass sheet package having a laminate in which the protective sheet and the glass original plate are alternately arranged.
Background
In the field of glass sheet production, there are cases where a glass raw sheet cut from a glass ribbon formed by a downdraw method, a float method, or the like is loaded as a laminate together with a protective sheet onto a tray or the like, and then both are taken out and subjected to various operations. As a specific example of the laminate, patent document 1 discloses that glass plates (glass raw plates) and protective sheets are alternately arranged in a vertical posture (inclined posture).
Among various operations for the glass raw plates taken out of such a laminate together with the protective sheet one by one, there is an operation of converting the posture of both from the vertical 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 superimposed on a protective sheet in a flat posture, a scribe line is formed on the upper surface of the glass original plate, and then the glass original plate is broken along the scribe line.
In the step of cutting the glass raw plate on the protective sheet in this manner, both ends in the width direction of the glass raw plate may be cut as unnecessary portions, and the unnecessary portions may be removed from the protective sheet after the cutting. When such a process is performed, a glass plate as a product can be obtained.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open publication No. 2019-104566
Patent document 2: japanese patent laid-open publication No. 2017-190255
Disclosure of Invention
Problems to be solved by the invention
However, according to patent document 1, in the laminate including the glass original plate in the vertical posture and the protective sheet, the upper end and the width direction both ends of the protective sheet protrude from both corners on the upper side of the glass original plate. In the cutting operation disclosed in patent document 2, both are taken out of the laminate as they are, and the postures of both are converted into the flat posture, and the cutting operation is performed.
In this case, when a cutting operation, for example, a breaking operation is performed, which requires bending deformation of the glass raw plate, there is a possibility that a corner portion on one side of the glass raw plate (a corner portion on the upper side of the glass raw plate in the case of a vertical posture) penetrates into the protective sheet. Therefore, when the glass original plate is broken along the scribe line, the corner portion on one side of the glass original plate is caught by the protective sheet, and thus smooth operation is prevented. When the unnecessary portion is lifted from the protective sheet by the holding tool such as the suction pad or the holding member after the breakage, the corner of the unnecessary portion is caught by the protective sheet, and the unnecessary portion may be separated from the holding tool. In addition, even if the detachment from the holding tool does not occur, the above-described hooking may not be required to be deformed or broken in some cases. In this case, the glass frit falls down and adheres to the glass plate as a product, and becomes a factor of not only the quality degradation of the glass plate but also the generation of defective products.
In view of the above, an object of the present invention is to provide a method for smoothly performing various operations on a glass raw plate by preventing the glass raw plate from getting stuck between the glass raw plate and a protective sheet when the glass raw plate and the protective sheet are taken out from a laminate in which the glass raw plate and the protective sheet are alternately arranged in a vertical posture.
Means for solving the problems
A first aspect of the present invention, which has been made to solve the above-described problems, is a method for manufacturing a glass sheet, comprising: a preparation step of preparing a laminate in which glass raw plates and protective sheets are alternately arranged in a longitudinal posture; a removing step of removing the glass original plate and the protective sheet from the laminate after the preparing step; a cutting step of cutting the glass original plate into a glass plate and an unnecessary portion in a state where the glass original plate is superimposed on the protective sheet in a flat posture after the taking-out step; and a removing step of removing the unnecessary portion from the protective sheet after the cutting step, wherein in the cutting step, one side of the protective sheet is configured to protrude from the protective sheet at a corner of the glass raw sheet, and the one side is an upper side of the glass raw sheet and the protective sheet when the glass raw sheet and the protective sheet are in the vertical posture.
According to this method, a cutting step is performed in which a group of two members taken out from a laminate in which glass raw plates and protective sheets are alternately arranged in a vertical posture are overlapped in a flat posture. When the cutting step is performed, the corner on one side of the glass raw plate protrudes from the protective sheet, and thus the corner on one side of the glass raw plate is prevented from penetrating the protective sheet. Here, "one side" means the upper side of both the glass original plate and the protective sheet when they are stacked in a vertical posture. In this case, even when the glass raw plate is bent or deformed such as by breaking or the like, the glass raw plate is prevented from being caught by the protective sheet on the one side in the cutting operation performed in the cutting step, and the cutting operation is smoothed. In the removal step after the cutting step, for example, a work is performed in which unnecessary portions are lifted and removed by a holding tool such as an adsorption pad or a holding member. In this case, too, the corner on the side where no part is needed (the corner on the side of the glass sheet) is prevented from being caught by the protective sheet. This prevents the unnecessary portion from falling off the holding tool, breakage of the unnecessary portion accompanying improper deformation, adhesion of the glass frit to the glass plate as a product, and the like. As a result, the work in the cutting step and the removal step is prevented from being interrupted inefficiently, and the quality of the glass sheet as a product is prevented from being lowered and defective products are prevented from being produced.
In the method, in the preparing step, the upper corner of the protective sheet may be cut off to produce the protective sheet used in the cutting step.
In this way, the protective sheet in the laminate until the preparation step is performed is not cut off at the upper corner, and therefore the entire upper region of the glass raw plate can be covered with the protective sheet. This makes it possible to properly protect the upper side of the glass plate with the protective sheet during transportation, conveyance, or the like of the laminate.
In the above method, the one side of the protective sheet used in the cutting step may be formed such that a corner portion of the glass raw plate on the product region side protrudes from the protective sheet.
In this way, after the removal step, the corner portion of the glass plate on the side corresponding to the product region of the glass plate still protrudes from the protective sheet. Thus, when the glass plate is subjected to the removal process, the corner of the glass plate does not penetrate into the protective sheet, and the operation after the removal process can be performed smoothly.
In this method, in the cutting step, the other side of the protective sheet may be formed such that the corner portion of the other side of the glass raw sheet protrudes from the protective sheet, and the other side may be a lower side of both the glass raw sheet and the protective sheet when the glass raw sheet and the protective sheet are in the vertical posture.
In this way, the corner of the glass original plate can be prevented from penetrating into the protective sheet on the other side of both the glass original plate and the protective sheet. This makes it possible to avoid difficulty in cutting operation, detachment of unnecessary parts from holding tools such as suction pads and holding members, breakage of unnecessary parts due to improper deformation, adhesion of glass frit to a glass plate as a product, and the like on the other side.
In the above method, the protective sheet used in the cutting step may be produced by cutting off a corner portion of the lower side of the protective sheet in the preparation step.
In this way, the protective sheet in the laminate until the preparation step is performed is not cut off at the lower corner, and therefore the entire lower region of the glass raw plate can be covered with the protective sheet. This makes it possible to properly protect the lower side of the glass plate with the protective sheet during transportation, conveyance, or the like of the laminate.
In the above method, the other side of the protective sheet used in the cutting step may be formed such that the other side corner of the product region in the glass raw plate protrudes from the protective sheet.
In this way, after the removal process, the corner portion of the other side of the glass sheet corresponding to the product region of the glass original sheet still protrudes from the protective sheet. Thus, when the glass plate is subjected to the removal process, the other corner of the glass plate does not penetrate into the protective sheet, and the operation after the removal process can be performed smoothly.
The method further comprises the following separation steps: in the method for manufacturing a glass plate, in a state where the glass plate is superimposed in a flat posture on the protective sheet instead of the glass raw plate, the protective sheet and the glass plate are conveyed with the one side being the conveyance direction front side, and the two travel directions are made different in the middle of the conveyance, whereby the separation of the protective sheet is started from the conveyance direction front side end of the glass plate and the two are separated, and the separation step is a step subsequent to the removal step.
In this way, the operation of separating the protective sheet from the glass plate can be smoothly performed. That is, in the case of carrying the glass sheet in a state of being superimposed on the protective sheet, if the protective sheet is penetrated into the corner portion on the front side in the carrying direction of the glass sheet, the glass sheet and the protective sheet may be carried in the same direction even if the carrying directions of the two are made different in the middle of carrying. As a result, the protective sheet cannot be separated from the glass plate, and there is a possibility that the glass plate may be broken. In the method described above, the front side of the protective sheet in the conveyance direction is formed so that the corner of the front side of the glass raw sheet in the conveyance direction protrudes. In this form, penetration of the glass original plate into the protective sheet does not occur. In this case, the positions of the corner portions of the glass raw plate and the corner portions of the glass plate are shifted by an amount corresponding to the removal of the unnecessary portions. Therefore, the penetration of the glass sheet is not generated or is difficult to be generated, and the work of separating the protective sheet from the glass sheet can be smoothed.
A second aspect of the present invention, which has been made to solve the above-described problems, is a glass sheet package body in which a laminate is mounted on a packaging tray, the laminate being formed by alternately arranging glass raw sheets and protective sheets in a vertical posture, wherein an upper side of the protective sheet is configured to protrude from the protective sheet at an upper corner of the glass raw sheet.
According to this glass sheet package, the protective sheet and the glass original sheet can be taken out in the state of being intact, and after the two are converted from the vertical posture to the flat posture, the glass original sheet is cut and unnecessary portions are removed from the protective sheet. Thus, the corner of the glass raw plate does not penetrate into the protective sheet, and the same advantages as those of the case described above can be obtained. Further, if the upper side of the protective sheet and the glass raw plate is set to the front side in the conveying direction, the operation of separating the protective sheet from the glass plate can be smoothly performed.
Effects of the invention
According to the present invention, when various operations are performed on the glass original plate after the glass original plate and the protective sheet are taken out from the laminated body in which the glass original plate and the protective sheet are alternately arranged in the vertical direction, the engagement between the two is less likely to occur, and the various operations are smoothly performed.
Drawings
Fig. 1 is a flowchart showing a method for manufacturing a glass plate according to an embodiment of the present invention.
Fig. 2 is a schematic side view showing a glass sheet package according to an embodiment of the present invention.
FIG. 3a is a front view, in longitudinal section, of a glass sheet package cut according to line A-A of FIG. 2.
Fig. 3b is an enlarged front view of a major portion of the glass sheet package, which is obtained by cutting along line A-A of fig. 2, shown enlarged.
Fig. 4a is a front view in longitudinal section showing a first other example of a glass sheet package according to an embodiment of the present invention.
Fig. 4b is an enlarged front view of a main part of a first other example of a glass sheet package according to an embodiment of the present invention.
Fig. 5a is a front view in longitudinal section showing a second other example of the glass sheet package according to the embodiment of the present invention.
Fig. 5b is an enlarged front view of a main part of a second other example of the glass sheet package according to the embodiment of the present invention.
Fig. 6a is a front view in longitudinal section showing a third other example of a glass sheet package according to an embodiment of the present invention.
Fig. 6b is an enlarged front view of a main part of a third other example of a glass sheet package according to an embodiment of the present invention.
Fig. 7a is a schematic perspective view showing a mode of performing a cutting process in the method for manufacturing a glass plate according to the embodiment of the present invention.
Fig. 7b is a schematic perspective view showing a mode of performing a cutting process in the method for manufacturing a glass plate according to the embodiment of the present invention.
Fig. 8 is a schematic side view showing a mode of performing a separation process 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 the problem in performing the separation step in the glass plate manufacturing method.
Detailed Description
Hereinafter, a method for manufacturing a glass sheet and a glass sheet package according to an embodiment of the present invention will be described with reference to the drawings.
As shown in fig. 1, the method for manufacturing a glass sheet according to the present embodiment includes: a preparation step 1 of preparing a laminate in which glass raw plates and protective sheets are alternately arranged in a vertical posture on a bundling tray; and a removal step (2) for removing the glass original plate and the protective sheet from the laminate. Moreover, the manufacturing method includes: a cutting step 3 of cutting the glass original plate in a state of being superimposed on the extracted protective sheet in a flat posture, and cutting the glass original plate into a glass plate and an unnecessary portion; a removing step 4 of removing unnecessary parts from the protective sheet; and a separation step (5) for separating the protective sheet from the glass plate.
Fig. 2 is a schematic side view illustrating the glass sheet 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 the above figures, the glass sheet package 6 is a glass sheet package in which a laminate 9 is mounted on a packaging tray 10, and the laminate 9 is formed by alternately arranging glass raw plates 7 and protective sheets 8 in a vertical posture (more specifically, in an inclined posture). The glass raw sheet 7 is a glass raw sheet obtained by cutting a glass ribbon formed by a downdraw process (e.g., overflow downdraw process) or a float process in the width direction. As shown in fig. 3a, both ends 7a in the width direction of the glass original plate 7 are unnecessary parts. The both end portions 7a are separated from the product region 7b by cutting the glass original plate 7 along the line to cut 7c in the cutting step 3.
In the glass raw plate 7, the plate thickness is preferably 100 to 2000 μm, and the length of each side is preferably 1500 to 4000mm. The thickness of the protective sheet 8 is preferably 100 to 500. Mu.m, and it is preferably a foamed resin sheet or a non-foamed resin sheet made of polyethylene or the like.
The following describes the form of the protective sheet 8 and the glass original plate 7. In the following description, the common components are denoted by the same reference numerals in the drawings with respect to the protective sheet 8 and the glass original plate 7 shown in fig. 3a to 6 b. The components denoted by the same reference numerals will not be described in detail.
The upper side of the protective sheet 8 shown in fig. 3a is configured to extend both corners 7d of the upper side of the glass original plate 7. More specifically, the protection sheet 8 is a protection sheet having a rectangular shape as a basic shape and having two corners on the upper side of the rectangular shape missing. The upper corner 7d of the rectangular glass original plate 7 extends from the upper edge 8a of the protection sheet 8. The extension L1 is preferably 5 to 20mm. In this case, the corner 7d on the upper side of the glass original plate 7 falls within the lacking portion 8b (the portion marked with parallel oblique lines of the one-dot chain line) of the protective sheet 8 shown in fig. 3b, and does not reach the outer edge 8c of the lacking portion 8 b. Therefore, the upper end portion 8d and the width direction both end portions 8e of the protection sheet 8 protrude from the upper side 7e and the width direction both side 7f of the glass original plate 7, respectively. The extension L2 from the upper side 7e is preferably 50 to 150mm, and the extension L3 from the width direction both sides 7f is preferably 50 to 200mm. In this case, the corner 7g formed by the upper side 7e of the glass original plate 7 and the line 7c to be cut (the upper corner of the product region 7 b) does not protrude from the upper defective edge 8a of the protective sheet 8. The separation dimension L4 from the top of the corner 7g to the end edge 8a is preferably 10mm or less. As shown in fig. 3a, the lower side 8f of the protective sheet 8 and the lower side 7h of the glass raw plate 7 are positioned at the same position or substantially the same position because they are in contact with or substantially in contact with the mounting surface 10a of the packing tray 10. In this case, in the illustration, the lower side 8f of the protective sheet 8 is in contact with the mounting surface 10a, and the lower side 7h of the glass original plate 7 is spaced upward from the mounting surface 10 a. In other words, the lower end portion of the protective sheet 8 including the lower side 8f protrudes from the lower side 7h of the glass original plate 7. In contrast to the illustration, the lower side 8f of the protective sheet 8 may be spaced 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 10 a. In other words, the lower end portion of the glass original plate 7 including the lower side 7h may protrude from the lower side 8f of the protective sheet 8.
In this embodiment, in the preparation step 1, the corners of the rectangular protection sheet are cut away to make the corners deficient. Therefore, the entire upper end portion and the entire width-direction end portions of the rectangular protective sheet protrude from the upper side 7e and the width-direction side 7f of the glass raw plate 7, respectively, during conveyance and conveyance of the glass plate package 6. This allows the entire area of the glass original plate 7 to be covered with the protective sheet, and the glass original plate 7 to be properly protected.
The corners of the rectangular protection sheet may be cut off at the time of carrying out the taking-out step 2 or after the taking-out step 2 and before the cutting step 3. The cutting operation may be performed manually by a worker or may be performed using a robot or the like. In addition, when the laminate 9 is produced, the protection sheet 8 having a corner portion lacking as shown in the figure may be used instead of the rectangular protection sheet. The upper edge 8a of the protective sheet 8 is shown as a straight line, but may be in a wavy shape, a zigzag shape, or an arc shape.
The form of the protective sheet 8 is not limited to the above-described form, and may be the form shown below. That is, the protective sheet 8 shown in fig. 4a lacks both corners on the lower side in addition to both corners on the upper side. As shown in fig. 4b, in the lower form of the protective sheet 8, the lower end portion of the lacking portion (the portion marked with parallel oblique lines of the one-dot chain line) 8g is located in the vicinity of the lower corner portion 7i of the glass original plate 7. Specifically, the lower end 8i of the lower edge 8h of the protective sheet 8 coincides with or substantially coincides with the top of the lower corner 7i of the glass raw plate 7. In this case, in the illustrated example, the lower side 8f of the protective sheet 8 is in contact with the mounting surface 10a, the lower side 7h of the glass original plate 7 is spaced upward from the mounting surface 10a, and the end edge 8h of the lower side of the protective sheet 8 is in contact with the top of the lower corner 7i of the glass original plate 7. In contrast to the illustration, the lower side 8f of the protective sheet 8 may be spaced upward from the mounting surface 10a, and the lower side 7h of the glass raw plate 7 may be in contact with the mounting surface 10a, in which case the lower end 8i of the end edge 8h of the protective sheet 8 may be in contact with the side 7f of the lower end portion of the glass raw plate 7 on the side in the width direction. The upper side of the protective sheet 8 is the same as that shown in fig. 3a and 3 b. The method of making the lower corner of the protective sheet 8 defective, the timing of the defective and the shape of the edge 8h are the same as those already described for the upper corner of the protective sheet 8 shown in fig. 3a and 3 b.
The upper side of the protective sheet 8 shown in fig. 5a is configured to extend both corners 7g of the upper side of the product region 7b of the glass original plate 7. Therefore, as shown in fig. 5b, both the upper corner 7d of the glass original plate 7 and the upper corner 7g of the product region 7b fall in the upper defective portion 8b (the portion marked with a single-dot chain line and parallel oblique lines) of the protective sheet 8, and do not reach the outer edge 8c of the defective portion 8 b. The protruding dimension L5 of the corner 7g of the upper side of the product region 7b is preferably 1 to 10mm. 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 spaced upward from the mounting surface 10 a. In contrast to the illustration, the lower side 8f of the protective sheet 8 may be spaced 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 10 a. In the illustrated example, the lower corner 8j is not missing in the protective sheet 8, but the lower corner 8j may be missing in the same manner as in the protective sheet 8 shown in fig. 4a and 4 b. The method of making the upper corner of the protective sheet 8 defective, the timing of the defective and the shape of the edge 8a are the same as those already described for the upper corner of the protective sheet 8 shown in fig. 3a and 3b.
In addition to the upper form of the protective sheet 8 shown in fig. 6a, the lower form is also a form in which both lower corners 7j of the product region 7b of the glass raw plate 7 are protruded. Therefore, as shown in fig. 6b, both the corner 7i on the lower side of the glass original plate 7 and the corner 7j on the lower side of the product region 7b fall in the lower side of the protection sheet 8 (the part marked with a single-dot chain line and parallel oblique lines) and do not reach the outer edge 8k of the lacking part 8g. The protruding dimension L6 of the lower corner 7j of the product region 7b from the end edge 8h is preferably 1 to 10mm. The lower side of the protective sheet 8 may be configured to extend only the lower corner 7i of the glass original plate 7. In this case, the protruding dimension of the lower corner 7i is preferably 5 to 20mm, and the separation dimension from the lower corner 7i to the edge 8h is preferably 10mm or less. In the illustration, the upper side of the protective sheet 8 is the same as the protective sheet 8 shown in fig. 5a and 5 b. The upper side of the protective sheet 8 may be the same as the protective sheet 8 shown in fig. 3a and 3 b. Here, the lower side 8f of the protective sheet 8 is located at the same position or substantially the same position as the lower side 7h of the glass original plate 7. In this case, in the example shown in fig. 6a and 6b, the lower side 8f of the protective sheet 8 is in contact with the mounting surface 10a, and the lower side 7h of the glass original plate 7 is spaced upward from the mounting surface 10 a. In contrast to the illustration, the lower side 8f of the protective sheet 8 may be spaced 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 10 a. Instead of these, the following may be used. That is, the protective sheet 8 is shifted downward relative to the glass original plate 7 during the removal step 2 or after the removal step 2 and before the cutting step 3. Thus, not only the upper side 7e of the glass original plate 7 but also the lower side 7h of the glass original plate 7 are reliably covered with the protective sheet 8. The terms "upper side" and "lower side" of the protective sheet 8 and the glass raw plate 7 described herein mean the upper side and the lower side in the case where the protective sheet 8 and the glass raw plate 7 are in the vertical posture. The method of making the lower corner of the protective sheet 8 missing and the shape of the edge 8h are the same as those already described for the upper corner of the protective sheet 8 shown in fig. 3a and 3 b.
The taking-out step 2 is performed using a device capable of holding the glass original plate 7 and the protective sheet 8 as a set, for example, a device having an adsorption pad for adsorbing and holding both the plates 7 and 8 at the tip, and a device having a holding member for holding both the plates 7 and 8 at the tip. These devices take out the glass original plate 7 and the protective sheet 8 from the laminate 9, and change their postures to a state in which the glass original plate 7 is superposed on the protective sheet 8 in a flat posture.
Fig. 7a and 7b are perspective views illustrating a mode of executing the cutting step 3. As shown in the above figures, in the cutting step 3, the glass original plate 7 is placed on the working surface 11a of the placement unit 11 in a state of being superimposed on the protective sheet 8 in a flat posture. The placement unit 11 is constituted by, for example, a conveying conveyor, a work tray on the conveyor, a work table, or the like. In fig. 7a, the side denoted by reference symbol B of the glass original plate 7 and the protective sheet 8 is the upper side of both the protective sheet 8 and the glass original plate 7, 8 when the glass original plate 7 is in the vertical posture. The other side of the glass original plate 7 and the protective sheet 8 indicated by reference character C is the lower side of both the protective sheet 8 and the glass original plate 7, 8 when the glass original plate 7 is in the vertical posture. Here, the glass original plate 7 and the protective sheet 8 are taken out from the laminated body 9 described with reference to fig. 3a and 3b, and the relative positional relationship between the two plates 7 and 8 is in the original state when the laminated body 9 is aligned. Thus, in the example shown in fig. 7a, the other side 8f of the protective sheet 8 is located at the same or substantially the same position as the other side 7h of the glass original plate 7, but may be the same as that already described with reference to fig. 3 a. That is, the end portion of the protective sheet 8 including the other side 8f may protrude from the other side 7h of the glass plate 7, or the end portion of the glass plate 7 including the other side 7h may protrude from the other side 8f of the protective sheet 8.
Fig. 7a illustrates a case where a scribe line along the line to cut 7c is formed on the surface (upper surface) of the glass original plate 7. In this embodiment, the scribing wheel 12 is moved along the line 7c to cut of the glass original plate 7, thereby forming a scribing line 7k along the line 7c to cut. In the illustration, the scribe line 7k is formed over the entire length from the other side toward one side of the glass original plate 7. The scribe line 7k may be formed at a position other than the other end and one end of the glass raw plate 7. Thereafter, bending stress is applied to the formation region of the score line 7k of the glass original plate 7, and the glass original plate 7 is broken along the score line 7k, whereby the glass original plate 7 is broken into a glass plate (glass plate as a product) 13 and an unnecessary portion 14 as shown in fig. 7 b.
Then, the removal process 4 is performed. In the removing step 4, after the unnecessary portion 14 is held by a holding tool such as an adsorption pad or a holding member, the holding tool lifts the unnecessary portion 14 and moves the unnecessary portion 14, thereby removing the unnecessary portion 14 from the protective sheet 8. In place of this, in the removing step 4, the unnecessary portion 14 may be removed from the protective sheet 8 by a worker using a tool or the like.
The operational effects when the cutting step 3 and the removing step 4 are performed are as follows. That is, in the cutting step 3, as shown in fig. 7a, the corner 7g of the glass original plate 7 on the product region 7b side does not protrude from the missing end edge 8a on the protective sheet 8 side. Thus, the end portion of the line 7c to cut is supported by the protection sheet 8 from below. In the figure, the other end of the line 7c is supported by the protective sheet 8 from below. Thus, the scribing line 7k can be accurately formed without being adversely affected by the height difference when the scribing wheel 12 is moved along the line 7c for cutting the glass original plate 7. This effect is also obtained when the other end portion of the protective sheet 8 protrudes from the other end portion 7h of the glass plate 7. When the other end portion of the glass original plate 7 protrudes from the other side 8f of the protective sheet 8, the same effect can be obtained by forming the scribe line 7k at a portion of the glass original plate 7 other than the other end portion and the one end portion.
In order to apply bending stress to the formation region of the scribe line 7k when the glass original plate 7 is broken, the glass original plate 7 needs to be bent and deformed. In contrast, the corner 7d of the glass original plate 7 protrudes from the missing end edge 8a of the protective sheet 8. Therefore, there is no possibility that the corner 7d of the glass original plate 7 penetrates the protective sheet 8, and the side is not caught between the both plates 7 and 8, so that the problem of being an obstacle to the breaking operation is avoided. In addition, when the unnecessary portion 14 is removed from the protective sheet 8 in the removal step 4, as shown in fig. 7b, no sticking occurs between the corner 14a of the unnecessary portion 14 (the portion of the corner of the glass original plate 7) and the protective sheet 8. This prevents the unnecessary portion 14 from falling off the holding tool, breakage of the unnecessary portion 14 due to improper deformation, and adhesion of the glass frit to the glass plate 13. As a result, the operations in the cutting step 3 and the removing step 4 are prevented from being interrupted inefficiently, and the quality of the glass sheet 13 is prevented from being lowered and defective products are prevented from being produced. In the drawing, the other side 7h of the glass original plate 7 and the other side 8f of the protective sheet 8 are positioned at the same position, and therefore, no catch is generated between the other side corner 7i of the glass original plate 7 and the protective sheet 8. This effect is also obtained when the other end of the glass original plate 7 protrudes from the other side edge 8f of the protective sheet 8. Therefore, in these cases, the other side can also avoid the problem that the breakage operation of the glass original plate 7 and the removal operation of the unnecessary portion 14 are hindered.
Fig. 8 illustrates a scheme in which the separation process 5 is performed after the removal process 4. In the separation step, the conveyance conveyor 15 conveys the protective sheet 8 and the glass plate 13 in the direction of arrow D. At the time when the both 7 and 8 reach the end 15a on the front side in the conveying direction of the conveying conveyor 15, the glass plate 13 still moves in the direction of arrow D and is transferred to the transfer unit 16 on the front side in the conveying direction of the conveying conveyor 15. In contrast, the direction of travel of the protective sheet 8 is switched to the lower direction by the attraction force of the negative pressure. In this embodiment, the transfer unit 16 is configured by a plurality of rollers 17 arranged along a single line in the direction of arrow D. Although the structure of applying negative pressure suction force to the protective sheet 8 is not shown, the conveying roller 18 disposed at the front end 15a of the conveying conveyor 15 in the conveying direction and the lower portion thereof apply negative pressure suction force only to the protective sheet 8. Here, the "conveyance direction front side" refers to the side of the glass original plate 7 in the removing step 4. In the separation step 5, the glass plate 13 and the protective sheet 8 are separated from each other from the end 13a on the front side in the conveyance direction of the glass plate 13 by being different in the conveyance direction in the arrow D direction. At this time, if the corner 13b (see fig. 7 b) on the front side in the conveyance direction of the glass plate 13 pierces the protection sheet 8, it is difficult to make the traveling directions of the glass plate 13 and the protection sheet 8 different. Therefore, for example, as shown in fig. 9, the end 13a on the front side in the conveyance direction of the glass sheet 13 collides with the roller 17 or the like of the transfer unit 16 together with the protective sheet 8, and the glass sheet 13 may be broken. In this case, the corner 13b on the front side in the conveyance direction of the glass sheet 13 does not protrude from the missing end edge 8a on the front side of the protection sheet 8, but the above-described penetration is difficult to occur because the corner 7d on one side of the glass sheet 7 protrudes from the end edge 8 a. As a result, the protective sheet 8 can be separated from the glass plate 13 appropriately in the manner shown in fig. 8.
The above description of the cutting step 3 to the separating step 5 has exemplified the case where the glass original plate 7 and the protective sheet 8 are taken out from the laminate 9 described with reference to fig. 3a and 3b and placed on the working surface 11a of the placement unit 11 in the state of being as is when the cutting step 3 is performed, but other than this, the following configurations may be exemplified. That is, in the first other example, both of the layers 7 and 8 are taken out from the laminated body 9 described with reference to fig. 4a and 4b and placed on the work surface 11a of the placement unit 11 in the state of being intact when the cutting step 3 is performed. In this way, the other corner 7i of the glass original plate 7 is less likely to be caught by the protection sheet 8 when the glass original plate is broken. Further, the other corner 14b (see fig. 7 b) of the unnecessary portion 14 is less likely to be caught by the protective sheet when the unnecessary portion is removed.
In the second other example, both of the layers 7 and 8 are taken out from the laminate 9 described with reference to fig. 5a and 5b and placed on the work surface 11a of the placement unit 11 in the state of being intact when the cutting step 3 is performed. In this way, in the separation step 5, the corner 13b on the front side in the conveyance direction of the glass plate 13 protrudes from the edge 8a of the defect on the front side in the conveyance direction of the protection sheet 8. Thus, the front end 13a of the glass plate 13 in the conveyance direction is reliably prevented from penetrating the protective sheet 8, and therefore the operation of separating the protective sheet 8 from the glass plate 13 can be performed without any obstacle.
In the third other example, the glass original plate 7 and the protective sheet 8 are placed on the work surface 11a of the placement unit 11 in the manner described with reference to fig. 6a and 6b when the cutting step 3 is performed. In this way, not only the same advantages as those of the second other example but also the following advantages can be obtained when the glass original plate 7 is broken, when the unnecessary portion 14 is removed, and when the protective sheet 8 is separated from the glass plate 13. That is, when the cutting step 3 and the removing step 4 are performed, penetration of the protective sheet 8 is reliably prevented not only in the corner 7d on one side of the glass original plate 7 but also in the corner 7i on the other side of the glass original plate 7. In this case, in the case where the protective sheet 8 is shifted downward as described in the embodiment shown in fig. 6a and 6b, not only the end face of the glass raw plate 7 along one side 7e but also the end face of the glass raw plate 7 along the other side 7h is protected by the protective sheet 8 during the execution of the cutting step 3 and the removing step 4. In addition, during the separation step 5, not only the end face of the side 13c of the glass plate 13 on the front side in the conveyance direction is protected by the protection sheet 8, but also the end face of the side 13d of the glass plate 13 on the rear side in the conveyance direction is protected by the protection sheet 8.
The protective sheet 8 of the above embodiment is a protective sheet in which a predetermined portion of a protective sheet having a rectangular basic shape is missing or a predetermined portion of a rectangular protective sheet is cut, but the shape of the protective sheet 8 is not limited to this. For example, the protection sheet 8 may be formed in a circular shape, an elliptical shape, or another polygonal shape by the cutting, and in such a shape, it is necessary to extend the corners of the glass raw sheet 7, the corners of the product region 7b, and the corners of the glass sheet 13 in the same manner as in the above-described case.
The lower side 8f of the protective sheet 8 of the above embodiment is in contact with or substantially in contact with the mounting surface 10a of the packing tray 10, but may be separated from the mounting surface 10 a. In this case, the lower side of the protective sheet 8 is configured to extend both lower corners 7i of the glass original plate 7 and both lower corners 7j of the product region 7b of the glass original plate 7. In this configuration, for example, a lower lacking portion 8g of the protective sheet 8 may be provided to secure the protruding dimension L6 of the lower corner 7j of the product region 7b from the end edge 8 h.
In the protective sheet 8 of fig. 4a and 4b and fig. 6a and 6b, the upper lacking portion 8b and the lower lacking portion 8g are independently provided, but the upper lacking portion 8b may be connected to the lower lacking portion 8 g. That is, when the glass original plate 7 is in the vertical posture, the upper and lower side corner portions 7d and the lower side corner portions 7i of the glass original plate 7 may be protruded by providing the vertical direction lacking portions in the protective sheet 8. Alternatively, when the glass original plate 7 is in the vertical posture, the upper and lower lacking portions may be provided in the protective sheet 8 so that the upper corner portions 7g and the lower corner portions 7j of the product region 7b of the glass original plate 7 protrude.
In the above embodiment, the separation step is performed after the cutting step (first cutting step) and the removal step (first removal step), but the second cutting step and the second removal step may be provided between the first removal step and the separation step. In the second cutting step, the upper end portion and the lower end portion of the glass original plate 7 in the vertical posture are cut as unnecessary portions. In the second removing step, unnecessary parts generated in the second cutting step are removed from the protective sheet.
In the above embodiment, one glass plate was cut out from the glass raw plate, but a plurality of glass plates may be cut out from the glass raw plate. In this case, for example, a dividing step may be provided between the removing step and the separating step, and the glass plate may be divided into a plurality of glass plates in the dividing step.
Description of the reference numerals
1. Preparation step
2. Extraction process
3. Cutting process
4. Removal step
5. Separation process
6. Glass plate packing body
7. Glass raw plate
Corner of one side (upper side) of 7d glass original plate
Corner of one side (upper side) of product region of 7g glass raw plate
Corner of the other side (lower side) of 7i glass original plate
Corner of the other side (lower side) of the product region of the 7j glass raw plate
8. Protective sheet
8A edge of one side (upper side) of the protective sheet
8B one side (upper side) of the protective sheet is deficient
Missing part of the other side (lower side) of the 8g protection sheet
The edge of the other side (lower side) of the 8h protection sheet
Corner of the other side (lower side) of the 8j protection sheet
9. Laminate body
10. Pallet for packing
13. Glass plate
13B corner of one side of glass plate
14. No part is needed
14A corner of the side where the portion is not required
14B corner of the other side of the unwanted portion
15. And a carrying conveyor.
Claims (9)
1. A method for producing a glass plate, comprising a cutting step of cutting a glass raw plate in a state where the glass raw plate is superimposed on a protective sheet in a flat posture to separate the glass raw plate into a glass plate and an unnecessary portion,
The method for manufacturing a glass plate is characterized in that,
The glass raw plate is rectangular, the protective sheet is in a shape with a side missing part which is formed by missing a corner part on one side of the rectangular shape,
In the cutting step, the one side of the protective sheet is configured to have a corner portion of the one side of the glass raw plate protruding from the one side lacking portion of the protective sheet,
The method for manufacturing the glass plate comprises the following separation steps: in a state where the glass sheets are stacked in a flat posture on the protective sheet used in the cutting step in place of the glass original sheet, both the protective sheet and the glass sheet are conveyed while taking the one side as a conveyance direction front side, and the two are made to have different traveling directions in the middle of the conveyance, whereby separation of the protective sheet is started from an end portion of the glass sheet on the conveyance direction front side and the two are separated,
The step after the cutting step includes a removing step of removing the unnecessary portion from the protective sheet, and the separating step is a step after the removing step.
2. A method for producing a glass sheet according to claim 1, wherein,
The method for producing a glass sheet includes a preparation step of preparing a laminate in which a glass original sheet and a protective sheet are alternately arranged in a vertical posture, and a removal step of removing the glass original sheet and the protective sheet from the laminate, as steps preceding the cutting step.
3. A method for producing a glass sheet according to claim 2, wherein,
The one side is an upper side of both the glass original plate and the protective sheet when the glass original plate and the protective sheet are in the vertical posture.
4. A method for producing a glass sheet according to claim 2 or 3, wherein,
In the preparation step, the upper corner of the protective sheet in the vertical position is cut to form the one-side lacking portion, thereby manufacturing the protective sheet used in the cutting step.
5. A method for producing a glass sheet according to any of claims 1 to 3,
The one side of the protective sheet used in the cutting step is formed such that a corner portion on one side of the product region in the glass raw sheet protrudes from the one side deficient portion of the protective sheet.
6. A method for producing a glass sheet according to any of claims 1 to 3,
The protective sheet has a shape with another side lacking part which is formed by lacking a corner part on the other side,
In the cutting step, the other side of the protective sheet is configured to have a corner portion of the other side of the glass raw plate protruding from the other side lacking portion of the protective sheet.
7. A method for producing a glass sheet according to claim 6, wherein,
The method for producing a glass sheet includes a preparation step of preparing a laminate in which a glass raw sheet and a protective sheet are alternately arranged in a vertical posture, and a removal step of removing the glass raw sheet and the protective sheet from the laminate, as a step before the cutting step, the other side being a lower side of both the glass raw sheet and the protective sheet when the glass raw sheet and the protective sheet are in the vertical posture.
8. A method for producing a glass sheet according to claim 6, wherein,
The method for manufacturing a glass plate includes a preparation step of preparing a laminate in which a glass raw plate and a protection sheet are alternately arranged in a vertical posture, and a removal step of removing the glass raw plate and the protection sheet from the laminate as a step before the cutting step, wherein the preparation step is performed by cutting off a corner portion on the lower side of the protection sheet in the vertical posture to form the other side deficient portion, thereby manufacturing the protection sheet used in the cutting step.
9. A method for producing a glass sheet according to claim 6, wherein,
The other side of the protective sheet used in the cutting step is formed such that a corner of the other side of the product region in the glass raw sheet protrudes from the other side deficient portion of the protective sheet.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019230438 | 2019-12-20 | ||
| JP2019-230438 | 2019-12-20 | ||
| PCT/JP2020/043432 WO2021124799A1 (en) | 2019-12-20 | 2020-11-20 | Glass plate manufacturing method and glass plate packaging body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114728433A CN114728433A (en) | 2022-07-08 |
| CN114728433B true CN114728433B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080079987.4A Active CN114728433B (en) | 2019-12-20 | 2020-11-20 | Method for manufacturing glass plate |
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| Country | Link |
|---|---|
| JP (1) | JPWO2021124799A1 (en) |
| KR (1) | KR20220113677A (en) |
| CN (1) | CN114728433B (en) |
| TW (1) | TWI811591B (en) |
| WO (1) | WO2021124799A1 (en) |
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- 2020-11-20 KR KR1020227015620A patent/KR20220113677A/en active Search and Examination
- 2020-11-20 JP JP2021565397A patent/JPWO2021124799A1/ja active Pending
- 2020-11-20 CN CN202080079987.4A patent/CN114728433B/en active Active
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- 2020-12-01 TW TW109142135A patent/TWI811591B/en active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114728433A (en) | 2022-07-08 |
| JPWO2021124799A1 (en) | 2021-06-24 |
| KR20220113677A (en) | 2022-08-16 |
| TWI811591B (en) | 2023-08-11 |
| TW202126592A (en) | 2021-07-16 |
| WO2021124799A1 (en) | 2021-06-24 |
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