WO2020095640A1

WO2020095640A1 - Method for manufacturing packing body and manufacturing apparatus

Info

Publication number: WO2020095640A1
Application number: PCT/JP2019/040659
Authority: WO
Inventors: 秀一郎奥本; 直樹熊崎; 衛中井; 栄鵜野; 翔北川
Original assignee: 日本電気硝子株式会社
Priority date: 2018-11-09
Filing date: 2019-10-16
Publication date: 2020-05-14
Also published as: KR20210088538A; CN112770976A; CN112770976B; JP2020075752A; JP7157927B2

Abstract

The present invention comprises a packing step S6 for structuring a packing body PC by mounting a lamination body LM obtained by alternately laminating a glass sheet GS and a protection sheet 20 onto a mounting surface 7b of a pallet 7 in a vertical posture. The packing step S6 comprises a measurement step for measuring height HL of the mounting surface 7b of the pallet 7 and an adjustment step for adjusting lamination height HS of the protection sheet 20 in accordance with the height HL of the mounting surface 7b.

Description

Package manufacturing method and manufacturing apparatus

The present invention relates to a manufacturing method and a manufacturing apparatus of a package body in which a laminated body is placed on a pallet.

As is well known, glass plates used in various fields include surface defects and surface defects such as glass substrates for flat panel displays (FPD) such as liquid crystal displays (LCD) and organic EL displays (OLED). The reality is that strict product quality is required for undulations.

To meet such requirements, the downdraw method is widely used as a method for manufacturing glass plates. As this downdraw method, an overflow downdraw method and a slot downdraw method are known.

The overflow down draw method is to pour molten glass into an overflow groove provided at the upper part of a molded body having a substantially wedge-shaped cross section, and to flow the molten glass overflowing from the overflow groove to both sides along side walls on both sides of the molded body. While flowing down, the lower end of the molded body is fused and integrated to continuously mold a glass ribbon. In the slot down draw method, a slot-shaped opening is formed in the bottom wall of the refractory to which the molten glass is supplied, and the molten glass is allowed to flow down through this opening to continuously form a glass ribbon. ..

In particular, in the overflow down draw method, the front and back surfaces of the molded glass ribbon are molded without contacting any part of the molded body during the molding process, resulting in a very flat surface with no defects such as scratches. It becomes a face.

As an apparatus for manufacturing a glass sheet using the overflow down draw method, as disclosed in Patent Document 1, a forming part having a formed body therein, a slow cooling part installed below the forming part, and a slow cooling part. Some have a cooling part and a cutting part provided below the. This glass plate manufacturing device overflows molten glass from the top of the molded body and forms a glass ribbon by fusing it at the lower end to pass the glass ribbon to the slow cooling section to remove its internal strain. Then, after cooling to room temperature in the cooling unit, the cutting unit cuts out a glass plate having a predetermined size from the glass ribbon.

The cut glass plate is carried out from the cutting part, packed in a dedicated pallet and transported. In this case, a plurality of glass plates are vertically stacked on the pallet. When stacking glass plates vertically on a pallet, between glass plates for the purpose of preventing scratches due to direct contact between glass plates and preventing damage to glass plates during transportation, A protective sheet (sheet material) as a cushioning material or a spacer is interposed. As a result, a laminated body in which glass plates and protective sheets are alternately arranged is formed on the pallet.

As a sheet feeding device for placing a protective sheet on a pallet, Patent Document 2 discloses a device including a cutting unit that cuts a belt-shaped sheet base material to form a protective sheet, and a holding unit that holds the protective sheet. ing. The holding means is configured to be movable in the vertical direction (vertical direction) and the horizontal direction (front-back direction), and transfers the protective sheet held in the vicinity of the cutting means to the pallet.

JP 2012-197185 A JP, 2014-223965, A

The pallet on which the laminated body is placed includes a back surface supporting portion that supports the rear surface of the glass plate in the laminated body and a bottom surface supporting portion that supports the bottom side of the glass plate. The back surface support portion is slightly inclined with respect to the vertical direction, and the bottom surface support portion is slightly inclined with respect to the horizontal direction. With this configuration, the stacked body is supported by the pallet in a vertical posture that is slightly inclined with respect to the vertical direction.

A large number of pallets are used to store or transport glass sheets in a laminated state. In this case, since there is an error in the inclination angle of the bottom surface support portion and the back surface support portion of each pallet, there is a problem in that the protective sheet is not properly placed on the pallet. For example, if the position of the lower end of the protective sheet is too high, the protection of the effective portion of the glass plate will be insufficient. In this case, the effective portions of the glass plates may come into contact with each other during transportation and be damaged. Here, the effective portion is a portion that becomes a product, and is a central portion excluding the edge portion of the glass plate. Alternatively, if the position of the lower end of the protective sheet is too low, the lower end of the glass sheet stacked on the protective sheet may be in a state of riding on the lower part of the protective sheet. In this case, when the protective sheet or the glass plate is taken out from the pallet, the glass plate in the mounted state may fall down and be damaged.

The present invention has been made in view of the above circumstances, and has a technical problem of accurately placing a protective sheet on a pallet.

The present invention is to solve the above-mentioned problems, and forms a package by placing a laminated body formed by alternately laminating glass sheets and protective sheets on a placing surface of a pallet in a vertical posture. A method of manufacturing a package including a packaging step, wherein the packaging step comprises a measuring step of measuring a height of a mounting surface of the pallet, and the protective sheet according to the height of the mounting surface. And an adjusting step of adjusting the stacking height of.

With this configuration, the height of the loading surface of the protective sheet with respect to the loading surface can be accurately specified by measuring the height of the loading surface of the pallet in the measuring process. In the adjustment step, the protective sheet can be accurately placed on the placement surface by adjusting the stacking height of the protective sheet based on the measurement result of the measurement step.

In the above method, in the adjusting step, the loading height of the glass plate may be adjusted according to the height of the placement surface measured in the measuring step. As a result, not only the protective sheet but also the glass plate can be accurately placed on the placement surface.

In the measuring step, the height of the mounting surface can be measured with a laser range finder. Since the laser rangefinder can measure the height of the mounting surface without contacting the pallet, dust generation due to contact with the pallet can be reliably prevented.

In the measurement step, the height of the placement surface may be measured at a measurement position apart from the protective sheet located on the forefront of the laminate.

Since the protective sheet has flexibility, if you try to measure the height of the placement surface near the lower end of the protective sheet already placed at the stacking position, the shaking of the lower end of the protective sheet will hinder the measurement. May be. In the present invention, the height of the mounting surface can be accurately measured by measuring the height of the mounting surface at a position distant from the protective sheet located on the forefront of the laminate formed on the mounting surface. ..

The packing step includes a sheet supply step of supplying the protective sheet to the pallet by a sheet supply apparatus, the sheet supply apparatus including a first transfer mechanism for vertically transferring the protective sheet and the first transfer mechanism. A second transfer mechanism that receives the protective sheet from the first transfer mechanism and horizontally transfers the protective sheet; and a feed mechanism that horizontally moves the first transfer mechanism and the second transfer mechanism, wherein the second transfer mechanism is the laser. A range finder may be provided.

As described above, the laminated body is configured by alternately laminating a plurality of glass plates and a plurality of protective sheets. In the present invention, by moving the second transfer mechanism by the feed mechanism, the laser range finder provided in the second transfer mechanism is provided so as to correspond to the stacking position of the protective sheets sequentially mounted on the mounting surface of the pallet. It can be moved to a position suitable for measurement. Thereby, each of the plurality of protective sheets included in the laminated body can be accurately placed on the placement surface.

The present invention is for solving the above problems, and a glass supply device for mounting a glass plate on the mounting surface of a pallet, and a sheet supply device for arranging a protective sheet so as to overlap the glass plate, In the manufacturing apparatus of the package provided, the sheet feeding device, the measurement unit for measuring the height of the mounting surface, the protective sheet according to the height of the mounting surface measured by the measuring unit. And a control device that adjusts the stacking height.

With such a configuration, the height of the loading position of the protective sheet with respect to the loading surface can be accurately specified by measuring the height of the loading surface of the pallet by the measuring unit. The control device of the sheet feeding device can accurately mount the protective sheet on the mounting surface by adjusting the stacking height of the protective sheet based on the measurement result of the measuring unit.

According to the present invention, it becomes possible to place the protective sheet on the pallet with high accuracy.

It is a conceptual diagram which shows the whole structure of the manufacturing apparatus of a glass plate. It is a perspective view of a sheet feeding device. FIG. 3 is an enlarged side view showing a main part of the sheet feeding device. It is a flowchart which shows the manufacturing method of a glass plate, a laminated body, and a package. It is a side view for explaining a packing process. It is a side view for explaining a packing process. It is a side view for explaining a packing process. It is a side view for explaining a packing process. It is an expansion side view for explaining a packing process. It is a side view for explaining a packing process. It is an expansion side view for explaining a packing process. It is an expansion side view for explaining a packing process.

Hereinafter, modes for carrying out the present invention will be described with reference to the drawings. 1 to 12 show an embodiment of a manufacturing apparatus and a manufacturing method according to the present invention.

As shown in FIG. 1, the manufacturing apparatus 1 includes a molding unit 2 that continuously molds a molten glass GM into a glass ribbon GR by a downdraw method, and a gradual removal process that removes internal strain of the glass ribbon GR below the molding unit 2. A cooling unit 3, a cooling unit 4 provided below the slow cooling unit 3, a cutting unit 5 provided below the cooling unit 4, and a conveyance for transferring the glass plate GS cut out from the glass ribbon GR by the cutting unit 5. The unit 6 and the packing unit 8 that places the glass plate GS on the pallet 7 are provided.

The forming unit 2 includes, inside the furnace wall, a formed body 9 that executes the overflow downdraw method, and an edge roller 10 that pulls out the molten glass GM overflowing from the formed body 9 as a glass ribbon GR.

The molded body 9 is formed in an elongated shape, and has an overflow groove 11 formed at the top, and a vertical surface portion 12 and an inclined surface portion 13 that form a pair of side wall portions facing each other. The pair of inclined surface portions 13 intersect each other by gradually approaching downward, and constitute the lower end portion 14 of the molded body 9. The edge roller 10 is configured as a pair of right and left rollers so as to sandwich the end portion of the glass ribbon GR in the width direction.

The slow cooling unit 3 slowly cools the glass ribbon GR descending from the molding unit 2 to remove its internal strain. That is, the temperature inside the slow cooling unit 3 is set so as to have a predetermined temperature gradient. The temperature of the glass ribbon GR gradually decreases as it descends in the slow cooling unit 3. The slow cooling unit 3 guides the glass ribbon GR vertically downward through the upper and lower guide rollers 15 disposed inside.

The cooling unit 4 further cools the glass ribbon GR by passing the glass ribbon GR transferred from the slow cooling unit 3. The cooling unit 4 cools the glass ribbon GR to near room temperature. The glass ribbon GR cooled by the cooling unit 4 is sent to the cutting unit 5 below.

The cutting unit 5 has a breaking device 16 that cuts the glass ribbon GR, which is transferred downward from the cooling unit 4, into a predetermined size. The glass ribbon GR continuously formed by the forming unit 2 is cut into a rectangular shape by the folding device 16 to obtain a glass plate GS. If necessary, a process of cutting and removing thick portions (ears) formed at both ends of the cut glass plate GS in the width direction, and an inspection of the cut glass plate GS are performed. The cut glass plate GS is carried out of the cutting unit 5 by the carrying unit 6 and sent to the packing unit 8.

The transport unit 6 is configured as a glass supply device that places the glass plate GS on the pallet 7. The transport unit 6 includes a plurality of holding units 17 that move the glass plate GS. Each holding part 17 has a clamp mechanism 17a capable of gripping the glass plate GS. The transport unit 6 grips the upper part GSa of the glass plate GS by the clamp mechanism 17a of the holding unit 17 and transports the glass plate GS so that the surface of the glass plate GS faces the moving direction. Further, the transport unit 6 transports the glass plate GS without holding the lower portion GSb of the glass plate GS. Each holding unit 17 can be moved three-dimensionally by a robot arm or other various moving mechanisms. Further, the thickness of the glass plate GS conveyed is, for example, 0.3 to 3.0 mm, but is not limited to this range.

The packing unit 8 includes a sheet supply device 18 that supplies the protective sheet 20 to the pallet 7. The sheet feeding device 18 is a cutting device 21 that cuts out the protective sheet 20 from the strip-shaped sheet raw material 19 sent from the raw material roll, and a first device that is arranged below the cutting device 21 and that vertically conveys the protective sheet 20. The transfer mechanism 22 includes a second transfer mechanism 23 that laterally transfers the protective sheet 20, and a controller 24 that mainly controls the first transfer mechanism 22 and the second transfer mechanism 23.

In the packing unit 8, the glass plate GS and the protective sheet 20 are alternately stacked in the vertical posture on the pallet 7 by the operation of the transport unit 6 and the sheet supply device 18. The pallet 7 has a first support surface 7a that supports one surface of the glass plate GS and one surface of the protective sheet 20, and a second support surface 7b (mounting surface) that supports the lower end portion GSc of the glass plate GS. Have. The first support surface 7a and the second support surface 7b intersect at 90 °. The first support surface 7a is inclined at a predetermined angle with respect to the vertical direction. Further, the second support surface 7b is inclined at a predetermined angle with respect to the horizontal direction. The second support surface 7b is supported by the cushioning member 7c. The cushioning member 7c is made of an elastic material, foamed resin, or the like in a sheet shape.

As the strip-shaped sheet base material 19 (protective sheet 20) supplied by the sheet supply device 18, resin sheets, paper, and various other materials are used. As the resin sheet, a foamed resin sheet such as a highly foamed polyethylene sheet can be preferably used. The thickness of the strip-shaped sheet base material 19 (protective sheet 20) is set to 0.05 to 2.00 mm, but is not limited to this range.

The cutting device 21 cuts the strip-shaped sheet raw material 19 by the cutting blade 21a while holding a part of the strip-shaped sheet raw material 19 by the first transfer mechanism 22. The cutting device 21 is supported by the first transfer mechanism 22.

The first transfer mechanism 22 includes a first holding portion 25 and a second holding portion 26 that are vertically movable, and a first guide member 27 that guides the holding

portions

25 and 26.

As shown in FIGS. 1 and 2, the first holding portion 25 holds the widthwise end portion of the upper portion 20 a of the protective sheet 20. The second holding portion 26 holds the widthwise end of the lower portion 20b of the protective sheet 20. Each holding

part

25, 26 has a

clamp mechanism

25a, 26a for holding both widthwise ends of the protective sheet 20.

The first guide member 27 is a long member that guides the holding

portions

25 and 26 in the vertical direction (vertical direction). The first guide member 27 is inclined at a predetermined angle with respect to the vertical direction. The inclination angle of the first guide member 27 is preferably equal to the inclination angle of the first support surface 7a of the pallet 7.

The first guide member 27 includes a drive mechanism that moves the holding

portions

25 and 26 in the vertical direction. This drive mechanism is composed of a belt transmission mechanism, but is not limited to this structure, and may be composed of, for example, a ball screw mechanism, a rack and pinion mechanism, a linear motor, or the like.

The first guide member 27 is suspended and supported by a feed mechanism 28 arranged above the pallet 7. The feeding mechanism 28 is divided into two parts, a base part 29 and a moving part 30, which are located above and below. The base 29 is fixed to a beam that is a building structure. The moving unit 30 is supported on the lower surface of the base unit 29 so as to be movable in the lateral direction. The base unit 29 moves the moving unit 30 in the lateral direction inclined with respect to the horizontal direction. That is, the moving unit 30 can move in the lateral direction parallel to the second support surface 7b configured as an inclined surface in the pallet 7. The base unit 29 includes a drive mechanism that moves the moving unit 30 laterally. This drive mechanism is composed of, for example, a ball screw mechanism, a rack and pinion mechanism, a linear motor, a belt transmission mechanism, and the like.

The second transfer mechanism 23 includes a third holding portion 31 and a fourth holding portion 32 that hold the protective sheet 20, and a second guide member 33 and a third guide member 34 that move the holding

portions

31 and 32 in the lateral direction. , A measuring unit 35 for measuring the height HL of the second supporting surface 7b (mounting surface) of the pallet 7.

The third holding portion 31 holds the upper portion 20a of the protective sheet 20, and the fourth holding portion 32 holds the lower portion 20b of the protective sheet 20. Each of the holding

parts

31 and 32 has a pair of

clamp mechanisms

31a and 32a capable of gripping the protective sheet 20 (see FIG. 2).

The second guide member 33 and the third guide member 34 are long members that intersect (eg, are orthogonal to) the first guide member 27. The second guide member 33 and the third guide member 34 are fixed to the first guide member 27. Therefore, the second guide member 33 and the third guide member 34 are configured to change their lateral positions as the first guide member 27 is moved by the feeding mechanism 28. The second guide member 33 and the third guide member 34 are inclined at a predetermined angle with respect to the horizontal direction. The inclination angles of the second guide member 33 and the third guide member 34 are preferably equal to the inclination angle of the second support surface 7b of the pallet 7. The second guide member 33 and the third guide member 34 support the third holding portion 31 and the fourth holding portion 32 so as to be movable in the lateral direction (inclination direction).

The second guide member 33 and the third guide member 34 have a drive mechanism for laterally moving the third holding portion 31 and the fourth holding portion 32. The drive mechanism is composed of a belt transmission mechanism, a ball screw mechanism, a rack and pinion mechanism, a feed mechanism such as a linear motor. Accordingly, the third holding portion 31 and the fourth holding portion 32 are configured to be able to move back and forth along a predetermined inclination direction (lateral direction).

The measuring unit 35 measures the height HL of the second supporting surface 7b (mounting surface) of the pallet 7 in a non-contact type. The measuring unit 35 is composed of, for example, a laser range finder, but is not limited to this structure. The measuring unit 35 is fixed to a middle portion of the lower surface of the third guide member 34. As a result, the measuring unit 35 is configured to be able to change its position in the lateral direction as the third guide member 34 is moved by the feeding mechanism 28.

The measuring unit 35 irradiates the second supporting surface 7b with the laser beam L before the third holding unit 31 and the fourth holding unit 32 place the protective sheet 20 on the pallet 7. As shown in FIG. 3, the measurement unit 35 measures the distance D1 between the measurement unit 35 and the measurement position PL on the second support surface 7b. By using this distance D1, the height HL of the second support surface 7b at the measurement position PL can be calculated. The measurement position PL is set at a position apart from the stacking position PS of the protection sheet 20. The distance D2 from the stacking position PS of the protective sheet 20 to the measuring unit 35 (measurement position PL) is preferably 10 to 100 mm, for example. Note that the cushioning member 7c of the pallet 7 is omitted in FIG. 3 (the same applies in FIGS. 9, 11, and 12).

The control device 24 controls operations related to gripping and releasing gripping of the glass plate GS in the transport unit 6, lifting and lowering operations, movement and stop, and the like. The control device 24 controls the first transfer mechanism 22, the second transfer mechanism 23, and the feed mechanism 28 to separate the lower end portion 20c of the protective sheet 20 from the second support surface 7b of the pallet 7 at a constant distance D3. In this state, the protective sheet 20 can be overlaid (contacted) with the first support surface 7 a of the pallet 7 or the glass plate GS placed on the pallet 7. In addition, the control device 24 controls the holding unit 17 of the transport unit 6 and the

transfer mechanisms

22 and 23 based on the data measured by the measurement unit 35, so that the position of the protective sheet 20 during transfer and the glass plate. The position of GS can be adjusted.

The control device 24 includes, for example, a computer (PC or the like) that implements various hardware such as a CPU, ROM, RAM, HDD, monitor, and input / output interface. The control device 24 includes an arithmetic processing unit (CPU) that executes various types of calculations, a storage unit (ROM, RAM, HDD) that stores various types of data, a transport unit 6,

transfer mechanisms

22, 23, and a feed mechanism 28. And a communication unit that transmits and receives signals to and from the measurement unit 35.

The arithmetic processing unit of the control device 24, based on the data measured by the measuring unit 35, the data stored in the storage unit, the program, and the like, the glass plate GS loaded on the second supporting surface 7b of the pallet 7 and the protection. The stacking heights HG, HS (see FIG. 3) of the sheets 20 are calculated. The stacking height HS of the protective sheet 20 placed at the stacking position PS is equal to the height HPS of the second supporting surface 7b at the stacking position PS and the distance between the second supporting surface 7b and the lower end portion 20c of the protective sheet 20. The distance D3 is added (HS = HPS + D3).

In the storage unit of the control device 24, the inclination angle of the second supporting surface 7b of each pallet 7, the size and thickness of the glass plate GS, the size and thickness of the protective sheet 20, the above distances D1 to D3, the glass plate GS. , A reference value for adjusting the position (height) of the protection sheet 20, position data and other data of the transport unit 6 and each of the

transfer mechanisms

22 and 23, and appropriate values of the protection sheet 20 and the glass plate GS based on each data. Programs for calculating the loading positions PG, PS and the loading heights HG, HS are stored.

The communication unit of the control device 24 is communicatively connected to the transport unit 6, the

transfer mechanisms

22 and 23, the feed mechanism 28, and the measuring unit 35.

Hereinafter, a method of manufacturing the glass plate GS by the manufacturing apparatus 1 having the above configuration, a method of manufacturing the laminated body LM formed by laminating the glass plate GS and the protective sheet 20, and a package formed by stacking the laminated body LM on the pallet 7. A method of manufacturing the body PC will be described.

As shown in FIG. 4, this method mainly includes a molding step S1, a slow cooling step S2, a cooling step S3, a cutting step S4, a carrying step S5, and a packing step S6.

In the molding step S1, the molten glass GM supplied to the molded body 9 of the molding unit 2 overflows from the overflow groove 11 and flows down along the vertical surface portion 12 and the inclined surface portion 13. The molten glass GM is fused and integrated at the lower end portion 14 of the molded body 9 to be molded as a glass ribbon GR. The edge roller 10 holds each end portion in the width direction of the glass ribbon GR and guides the glass ribbon GR downward.

In the slow cooling step S2, the glass ribbon GR descended from the forming section 2 passes through the slow cooling section 3. At this time, the glass ribbon GR is gradually cooled according to a predetermined temperature gradient while being guided downward by the guide roller 15, and the internal strain is removed.

In the cooling step S3, the glass ribbon GR is further cooled by natural cooling in the cooling unit 4. After that, in the cutting step S4, the glass ribbon GR is cut out as a glass plate GS having a predetermined size by the breaking device 16. The glass plate GS formed into a rectangular shape by cutting is discharged from the cutting section 5 in the carrying step S5, and is carried toward the pallet 7 arranged in the packing section 8. In addition, between the cutting step S4 and the transporting step S5, a step of cutting and removing thick portions formed at both ends of the glass plate GS in the width direction, and a step of inspecting the glass plate GS are performed as necessary. It is provided.

In the carrying step S5, the upper part GSa of the glass plate GS is held by the holding part 17 (clamp mechanism 17a) of the carrying part 6. The holding unit 17 conveys the glass plate GS from the cutting unit 5 to the pallet 7 in a suspended state in which the lower portion GSb of the glass plate GS is separated from the floor surface.

The packing step S6 includes a sheet supplying step of supplying the protective sheet 20 to the pallet 7 by the sheet supplying device 18, and a placing step of placing the glass plate GS on the pallet 7 by the conveying section 6. In the packing step S6, the sheet supplying step and the placing step simultaneously proceed.

The operation of the packing unit 8 related to the sheet supply process and the placement process will be described below with reference to FIGS. 5 to 12. In the following example, a case where the first protective sheet 20A and the second protective sheet 20B and the first glass plate GS1 and the second glass plate GS2 are alternately stacked on the pallet 7 will be described.

In the sheet supply process, the sheet supply device 18 operates the feeding mechanism 28 by the control device 24 to move the cutting device 21, the first transfer mechanism 22 and the second transfer mechanism 23 to predetermined positions (loading start positions). In this case, the second guide member 33 and the third guide member 34 of the second transfer mechanism 23 are arranged above the second support surface 7b of the pallet 7. As a result, the measuring unit 35 is located above the second support surface 7b of the pallet 7. The 2nd transfer mechanism 23 arranges the 3rd holding part 31 and the 4th holding part 32 in the position which can receive the 1st protection sheet 20A (refer FIG. 5).

The sheet supply device 18 supplies the strip-shaped sheet base material 19 to the cutting device 21. As shown in FIG. 5, the holding

parts

25 and 26 of the first transfer mechanism 22 are on standby at positions near the cutting device 21. The second holding portion 26 holds the widthwise end portion of the strip-shaped sheet base material 19 by the clamp mechanism 26a. In this case, the strip-shaped sheet base material 19 is gripped with the lower end portion 19a protruding downward from the second holding portion 26. The protrusion length LSa of the lower end portion 19a can be adjusted by the position control of the second holding portion 26 by the control device 24.

The second holding portion 26 moves downward along the first guide member 27 when the strip-shaped sheet base material 19 is gripped (see FIG. 6). As a result, the strip-shaped sheet base material 19 is delivered downward. The second holding unit 26 stops after moving a predetermined distance. Then, the clamp mechanism 25a of the first holding portion 25 grips the widthwise end portion of the strip-shaped sheet base material 19. As a result, the strip-shaped sheet base material 19 is held by the first holding unit 25 and the second holding unit 26 in a state in which the band-shaped sheet base material 19 has been sent out by the cutting device 21 for a predetermined length.

Next, the cutting device 21 brings the cutting blade 21a into contact with the strip-shaped sheet raw material 19 and cuts the strip-shaped sheet raw material 19 at a position above the first holding portion 25 over the entire width direction. As a result, the first protective sheet 20A is cut out from the strip-shaped sheet base material 19. 20 A of 1st protective sheets will be in the state which the width direction edge part in the upper part 20a and the lower part 20b was hold | maintained by the 1st holding part 25 and the 2nd holding part 26. Further, the lower end portion 19a of the strip-shaped sheet base material 19 becomes the lower end portion 20c of the first protective sheet 20A. After that, the first transfer mechanism 22 lowers the first holding portion 25 and the second holding portion 26 along the first guide member 27, and moves the first protective sheet 20A downward.

As shown in FIG. 7, the third holding part 31 and the fourth holding part 32 of the second transfer mechanism 23 stand by at a position where the first protective sheet 20A can be received from the first transfer mechanism 22. The first holding unit 25 and the second holding unit 26 of the first transfer mechanism 22 are stopped after descending to a position where the first protective sheet 20A can be passed to the second transfer mechanism 23. Next, the second transfer mechanism 23 holds the first protective sheet 20A by the

clamp mechanisms

31a and 32a of the third holding part 31 and the fourth holding part 32. Then, the first transfer mechanism 22 releases the holding of the first protective sheet 20A by the

clamp mechanisms

25a and 26a of the first holding unit 25 and the second holding unit 26. As a result, the first protective sheet 20A is transferred from the first transfer mechanism 22 to the second transfer mechanism 23.

As shown in FIGS. 7 and 8, the second transfer mechanism 23 causes the third holding portion 31 and the fourth holding portion 32 holding the first protective sheet 20A to move from the standby position to the second guide member 33 and the third holding portion. It is advanced along the guide member 34. When the second transfer mechanism 23 moves the first protection sheet 20A to the stacking position PS1 on the pallet 7, the second holding mechanism 31 stops the third holding unit 31 and the fourth holding unit 32.

The measurement unit 35 starts measuring the height HL of the second support surface 7b before the first protection sheet 20A is transferred from the first transfer mechanism 22 to the second transfer mechanism 23 (measurement step). In the measurement process, the control device 24 transmits a control signal to the measurement unit 35, and the measurement unit 35 irradiates the laser light L downward (see FIGS. 7 and 9). The measurement unit 35 irradiates the laser light L to the first measurement position PL1 on the second support surface 7b and receives the reflected laser light, whereby the distance D1a (the first measurement position PL1) between the measurement unit 35 and the first measurement position PL1. The height HL1) of the second support surface 7b at one measurement position PL1 is measured. The measurement unit 35 transmits the measured data to the communication unit of the control device 24.

The control device 24 receives the data on the received height HL1 (distance D1a) of the second support surface 7b, the data on the inclination angle of the second support surface 7b stored in the storage unit, and the thickness of the first protective sheet 20A. Of the second support surface 7b at the stacking position PS1 of the first protection sheet 20A on the basis of the data relating to the first protection sheet 20A and the data relating to the distance D2 between the first protection sheet 20A and the measuring unit 35 which are stacked on the first support surface 7a. The height HPS1 is calculated. Further, the control device 24 relates to the data regarding the height HPS1 of the second support surface 7b and the separation distance D3 between the lower end portion 20c of the first protection sheet 20A arranged at the stacking position PS1 and the second support surface 7b. The stacking height HS1 of the first protection sheet 20A at the stacking position PS1 is calculated based on the data.

The control device 24 compares the calculated value of the loading height HS1 with the reference value of the loading height stored in the storage unit. The control device 24 calculates the difference between the calculated value of the stacking height HS1 and the reference value, and transmits this difference to the first transfer mechanism 22 as a correction value (adjustment step). The first transfer mechanism 22 adjusts the heights HA1 and HA2 (see FIG. 7) of the first holding unit 25 and the second holding unit 26 based on the received correction value. After this adjusting step, the first protective sheet 20A is transferred from the first transfer mechanism 22 to the second transfer mechanism 23 as described above.

The control device 24 also receives the data on the received height HL1 (distance D1a) of the second support surface 7b, the data on the inclination angle of the second support surface 7b stored in the storage unit, and the first support surface 7a. On the second support surface 7b next to the first protective sheet 20A based on the data on the distance D2 between the first protective sheet 20A and the measuring unit 35 and the data on the thickness of the first protective sheet 20A. The stacking height HG1 related to the stacking position PG1 of the mounted first glass plate GS1 is calculated. Specifically, the control device 24 calculates the height HB1 (see FIG. 10) of the holding unit 17 when the lower end portion GSc of the first glass plate GS1 is in contact with the stacking position PG1.

The control device 24 compares the numerical value of the calculated stacking height HG1 with the reference value of the stacking height at the stacking position PG1 of the first glass plate GS1 stored in the storage unit, and calculates the difference. The control device 24 transmits this difference to the transport unit 6 as a correction value.

The control device 24 controls the holding unit 17 of the transport unit 6 to move the first glass plate GS1 in order to place the first glass plate GS1 on the stacking position PG1. As shown by the solid line in FIG. 10, the holding portion 17 temporarily stops at a position above the second support surface 7b of the pallet 7. After that, the control device 24 controls the holding unit 17 to move the first glass plate GS1 obliquely downward (direction indicated by an arrow in FIG. 10) from the stop position toward the stacking position PG1.

In the above case, the holding unit 17 adjusts its height HB1 based on the correction value of the height of the first glass plate GS1 transmitted from the control device 24 (adjustment step). In the adjusting step, the lower end portion GSc of the first glass plate GS1 is brought into contact with the loading position PG1 set on the second supporting surface 7b of the pallet 7 based on the correction value of the loading height calculated by the control device 24. The coordinate position (HB1) of the holding unit 17 is set.

Alternatively, in the adjusting step, the holding unit 17 in the case where the first glass plate GS1 is brought into contact with the stacking position PG1 by descending from the position temporarily stopped as described above based on the height correction value calculated by the control device 24. The descending amount HB2 of is set. The descending amount HB2 of the holding unit 17 is preferably adjusted within the range of less than 20 mm.

The first glass plate GS1 is placed at the loading position PG1 on the second support surface 7b of the pallet 7 so as to overlap the first protective sheet 20A. After that, the holding unit 17 of the transport unit 6 releases the holding of the first glass plate GS1 and moves to the cutting unit 5. When the first glass plate GS1 is placed at the stacking position PG1, the lower end portion 20c of the first protective sheet 20A is separated from the second support surface 7b, and the first support surface 7a and the first glass plate GS1 cause the first protection sheet 20A to move. It will be sandwiched.

When the placement of the first glass plate GS1 is completed, the third holding unit 31 and the fourth holding unit 32 of the second transfer mechanism 23 release the holding of the first protective sheet 20A and move the next second protective sheet 20B. Retract to hold (see FIG. 11). Since the width of the first protective sheet 20A is larger than the width of the first glass sheet GS1, even if the first glass sheet GS1 is overlaid on the first protective sheet 20A as described above, the third holding sheet 3A is held. The portion 31 and the fourth holding portion 32 can hold the widthwise end portion of the first protective sheet 20A without contacting the first glass plate GS1 and can release the holding.

As shown in FIG. 11, the control device 24 operates the feeding mechanism 28 and retracts the first transfer mechanism 22 and the second transfer mechanism 23. In this case, the lateral movement distances of the first transfer mechanism 22 and the second transfer mechanism 23 are equal to the sum of the thickness of the first protective sheet 20A and the thickness of the first glass plate GS1.

Upon completion of this movement, the measuring unit 35 irradiates the new second measurement position PL2 with the laser light L (see FIG. 12). The measurement unit 35 receives the reflected laser light to measure the height HL2 of the second support surface 7b at the second measurement position PL2 (the distance D1b between the second support surface 7b and the measurement unit 35). The measurement unit 35 transmits data regarding the measured height HL2 (distance D1b) to the control device 24.

The control device 24 receives the measurement data received from the measurement unit 35, the data regarding the inclination angle of the second support surface 7b stored in the storage unit, and the data regarding the distance D2 between the measurement unit 35 and the first protective sheet 20A. The stacking height HS2 at the stacking position PS2 of the second protective sheet 20B to be stacked on the first glass plate GS1 is calculated based on the data on the thickness of the first glass plate GS1 and the like. The control device 24 calculates the height HPS2 of the second support surface 7b at the stacking position PS2, and calculates the height HPS2 and the distance D3 between the lower end portion 20c of the second protective sheet 20B and the second support surface 7b. The sum is calculated as the stacking height HS2.

The controller 24 compares the reference value of the stacking height PS2 of the second protection sheet 20B stored in the storage unit with the calculated stacking height HS2, and calculates the difference. The control device 24 transmits this difference to the first transfer mechanism 22 as a correction value for the stacking height HS2.

The first transfer mechanism 22, based on the correction value of the height received from the control device 24, before transferring the new second protective sheet 20B to the second transfer mechanism 23, the first holding unit 25 and the second holding unit. The heights HA1 and HA2 of 26 (see FIG. 10) are adjusted. After the adjusting step, the second protective sheet 20B is transferred from the first transfer mechanism 22 to the second transfer mechanism 23.

The second transfer mechanism 23 laterally moves the third holding part 31 and the fourth holding part 32, and moves the second protective sheet 20B to the stacking position PS2. The 3rd holding part 31 and the 4th holding part 32 stop in the state which overlapped the 2nd protective sheet 20B on the 1st glass plate GS1 (refer FIG. 12).

Since the second transfer sheet 20B is adjusted to the appropriate stacking height HS2 by the first transfer mechanism 22, the lower end portion 20c of the second protective sheet 20B is in the stacking position with the third holder 31 and the fourth holder 32 stopped. In PS2, the pallet 7 is separated from the second support surface 7b by a distance D3. The second protective sheet 20B is positioned on the forefront (front side of the first protective sheet 20A) of the laminate LM in the process of being manufactured, in a state of being stacked on the first glass plate GS1.

The control device 24 calculates the loading height HG2 of the new second glass plate GS2 at the loading position PG2 based on the measurement data and the like received from the measuring unit 35. The control device 24 compares the calculated value of the stacking height HG2 with the corresponding reference value, and calculates the difference between them. The control device 24 transmits this difference to the transport unit 6 as a correction value. The holding unit 17 has its height HB1 (or the descending amount HB2) adjusted based on the correction value. The second glass plate GS2 is placed at the loading position PG2 on the second support surface 7b through this adjusting step (see FIG. 12).

When the second glass plate GS2 is placed on the second support surface 7b, the second transfer mechanism 23 releases the holding of the second protective sheet 20B by the third holding portion 31 and the fourth holding portion 32. The third holding unit 31 and the fourth holding unit 32 move toward the first transfer mechanism 22 to hold the next third holding sheet.

Further, the control device 24 operates the feeding mechanism 28 to retract the first transfer mechanism 22 and the second transfer mechanism 23 by a certain distance (the sum of the thickness of the second protective sheet 20B and the thickness of the second glass plate GS2). Let The measurement unit 35 irradiates the laser beam L to the third measurement position, which is separated by the distance D2 from the frontmost second protection sheet 20B placed on the second support surface 7b. The data related to the height of the second support surface 7b measured by the measuring unit 35 is used by the control device 24 to calculate the stacking height of the third protective sheet and the third glass plate.

By repeating the above operation, a laminated body LM in which a predetermined number of glass plates GS and protective sheets 20 are alternately laminated is configured. At the same time, a package PC in which the stacked body LM is stacked on the pallet 7 is configured. Then, the protective cover is put on the laminated body LM. The protective cover is fixed to the pallet 7. With the above, the packing step S6 is completed.

In the above example, in the adjusting step, in order to adjust the stacking heights HS1 and HS2 of the first protective sheet 20A and the second protective sheet 20B, the first holding unit 25 and the second holding unit of the first transfer mechanism 22 are adjusted. Although the heights HA1 and HA2 of the portion 26 are adjusted, the present invention is not limited to this aspect.

As another example, the stacking height HS of the protective sheet 20 can be adjusted by adjusting the protruding length LSa that causes the lower end portion 19a of the strip-shaped sheet base material 19 to project from the second holding portion 26 in the sheet supplying step. In this example, the heights HA1 and HA2 of the first holding portion 25 and the second holding portion 26 are not adjusted, but the vertical dimension of the

protective sheets

20A and 20B cut out from the strip-shaped sheet base material 19 is changed, The stacking heights HS1 and HS2 of the

protection sheets

20A and 20B can be adjusted.

According to the manufacturing apparatus 1 and the manufacturing method according to the present embodiment described above, by measuring the height HL at the measurement position PL of the second support surface 7b of the pallet 7 by the measuring unit 35 (measuring step), the protective sheet The stacking height HS at the 20 stacking positions PS can be accurately calculated. In the adjustment step, the stacking height HS of the protective sheet 20 is adjusted according to the measurement data (height HL) of the measuring unit 35, so that the protective sheet 20 is accurately positioned with respect to the stacking position PS of the second support surface 7b. Can be placed well. In addition, the glass plate GS can be accurately placed on the loading position PG of the second support surface 7b by the measurement process and the adjustment process.

In addition, in the packing step S6, the weight of the laminated body LM increases due to the increase of the glass plates GS and the protection sheet 20 loaded on the pallet 7. In this case, the height HL of the second support surface 7b of the pallet 7 at the measurement position PL changes due to the compressive deformation of the cushioning member 7c due to the increase in weight. Even in such a case, the height HL of the second supporting surface 7b is measured every time the protective sheet 20 is mounted on the second supporting surface 7b (measurement step), and the protective sheet 20 is newly mounted on the second supporting surface 7b. By adjusting the stacking heights HG and HS of the glass plate GS and the protective sheet 20 to be placed (adjustment step), the glass plate GS and the protective sheet 20 can be accurately placed on the second support surface 7b.

The present invention is not limited to the configurations of the above-described embodiments, and is not limited to the above-described operational effects. The present invention can be variously modified without departing from the scope of the present invention.

In the above embodiment, the laser range finder is illustrated as the measuring unit 35 provided in the second transfer mechanism 23, but the present invention is not limited to this configuration. The measurement unit 35 may be configured by an image pickup device such as a CCD camera. In this case, the control device 24 controls the measuring unit 35 to capture an image of the second supporting surface 7b of the pallet 7 and analyze the acquired image data (measurement data) to detect the glass plate GS and the protective sheet 20. The loading heights HG and HS can be calculated.

In the above embodiment, an example in which the glass plate GS is manufactured by the overflow downdraw method has been shown, but the present invention is not limited to this. The glass plate GS can be manufactured by a slot down draw method or other various forming methods.

1 Manufacturing Equipment 6 Conveyance Section (Glass Supply Equipment)
7 Pallet 7b Second support surface (mounting surface)
18 Sheet Supply Device 20 Protective Sheet 22 First Transfer Mechanism 23 Second Transfer Mechanism 35 Measuring Unit (Laser Distance Meter)
GS Glass plate HL Height of mounting surface HS Protective sheet stacking height HG Glass plate stacking height LM Stack PC Packing S6 Packing process

Claims

A method of manufacturing a packaging body, including a packaging step of configuring a packaging body by placing a laminated body formed by alternately laminating a glass plate and a protective sheet on a placing surface of a pallet in a vertical posture,
The packing step includes a measuring step of measuring the height of the placing surface of the pallet, and an adjusting step of adjusting the stacking height of the protective sheet according to the height of the placing surface. And a method for manufacturing a package.
The method of manufacturing a package according to claim 1, wherein, in the adjusting step, the stacking height of the glass plate is adjusted according to the height of the placing surface measured in the measuring step.
The method for manufacturing a package according to claim 1 or 2, wherein in the measuring step, the height of the mounting surface is measured by a laser distance meter.
In the measurement step, the height of the mounting surface is measured at a measurement position distant from the protective sheet located on the forefront side of the laminate, and the packaging body according to any one of claims 1 to 3. Production method.
The packing step includes a sheet supply step of supplying the protective sheet to the pallet by a sheet supply device,
The sheet feeding device includes a first transfer mechanism that vertically transfers the protection sheet, a second transfer mechanism that receives the protection sheet from the first transfer mechanism and horizontally transfers the protection sheet, the first transfer mechanism, and A feed mechanism for moving the second transfer mechanism in the lateral direction,
The method for manufacturing a package according to claim 3, wherein the second transfer mechanism includes the laser range finder.
In a manufacturing apparatus for a package, which includes a glass supply device that mounts a glass plate on a mounting surface of a pallet, and a sheet supply device that arranges a protective sheet so as to overlap the glass plate,
The sheet feeding device measures a height of the placement surface, and a control device that adjusts a stacking height of the protective sheet according to the height of the placement surface measured by the measurement unit. An apparatus for manufacturing a package, comprising: