Sheet raw material piece supplying device

Abstract

The sheet raw material piece supply device (6) includes a support device (8) that supports a first raw material piece roll (R1) and a second raw material piece roll (R2), and a joining device (9) that joins a portion of a first sheet raw material piece (OS1) of the first raw material piece roll (R1) to an end portion (OSa) of a second sheet raw material piece (OS2) of the second raw material piece roll (R2). The joining device (9) includes an end portion holding portion (24) that holds the end portion (OSa) of the second sheet raw material piece (OS2), and a first pressing member (22a) that presses the portion of the first sheet raw material piece (OS1) against the end portion (OSa) of the second sheet raw material piece (OS2).

Description

TECHNICAL FIELD

[0001] The present application relates to a sheet material supply device for supplying a sheet material for a protective sheet that overlaps a glass sheet. BACKGROUND

[0002] As is well known, as a method for transporting various glass sheets such as a glass substrate for a display, a glass substrate for a solar cell, and the like, a glass sheet bundle is mostly used. A protective sheet in a rectangular shape is formed by cutting a sheet material drawn from a material roll, and a glass sheet overlapping the protective sheet is loaded on a tray, thereby manufacturing a glass sheet bundle (for example, refer to Patent Literature 1).

[0003] In order to efficiently manufacture a glass sheet bundle, it is necessary to efficiently perform a material roll replacement. For example, a sheet material supply device disclosed in Patent Literature 2 holds two material rolls (roll portions) configured by winding a sheet material, and can adhere the sheet material of one material roll (hereinafter referred to as "first material roll") to the sheet material of the other material roll (hereinafter referred to as "second material roll").

[0004] The sheet material supply device has a holding member that holds each material roll so as to be rotatable, and an adhering device (adhering portion) that adheres the sheet materials of each material roll to each other.

[0005] The adhering device of the sheet material supply device adheres the sheet materials to each other by pressing the sheet material in use of the first material roll against an adhering layer provided at an end portion (winding end portion) of the sheet material of the second material roll.

[0006] PRIOR ART DOCUMENTS

[0007] PATENT LITERATURE

[0008] Patent Literature 1: Japanese Patent Application Laid-Open No. 2014-114165

[0009] Patent Literature 2: Japanese Patent Application Laid-Open No. 2017-121985 SUMMARY

[0010] PROBLEMS TO BE SOLVED BY THE INVENTION

[0011] In the conventional sheet material supply device, the holding member does not hold the end portion of the sheet material of the second material roll, but holds the second material roll so as to be rotatable. Therefore, when the adhering device performs the adhesion of the sheet materials, the sheet material of the second material roll is hung down, and the adhering layer formed at the end portion thereof can be attached to other constituent members of the sheet material supply device, which causes an obstacle to the replacement work of the material roll.

[0012] The present application has been achieved in view of the above-described circumstances, and a technical problem is to reliably perform a roll replacement.

[0013] Means for solving the problem

[0014] The present application is a sheet material piece supply device for supplying a sheet material piece for a protective sheet that overlaps a glass sheet from a material piece roll, the sheet material piece supply device characterized by including a first material piece roll wound by a first sheet material piece and a second material piece roll wound by a second sheet material piece, and by including a support device that supports the first material piece roll and the second material piece roll, and a joining device that joins a portion of the first sheet material piece to an end portion of the second sheet material piece, the joining device including an end portion holding portion that holds the end portion of the second sheet material piece, and a first pressing member that presses the portion of the first sheet material piece to the end portion of the second sheet material piece.

[0015] According to this structure, the joining device can press the portion of the first sheet material piece of the first material piece roll to the end portion of the second sheet material piece of the second material piece roll using the first pressing member while holding the end portion of the second sheet material piece of the second material piece roll using the end portion holding portion. Thus, it is possible to prevent the end portion of the second sheet material piece from being accidentally pulled out and coming into contact with the constituent members of the sheet material piece supply device. Thus, it is possible to reliably perform the replacement of the first material piece roll and the second material piece roll.

[0016] The end portion holding portion can include a holding surface that holds the end portion of the second sheet material piece by suction. Thus, it is possible to easily and reliably perform the holding and releasing of the end portion of the second sheet material piece by the end portion holding portion.

[0017] The support device can include a support body that supports the first material piece roll and the second material piece roll, the support body being configured to change a posture to a first posture and a second posture in conjunction with a rotation of the support body, the first posture being a posture in which the first sheet material piece does not overlap the second sheet material piece and the first sheet material piece can be pulled out from the first material piece roll, the second posture being a posture in which the first sheet material piece overlaps the end portion of the second sheet material piece, the end portion holding portion being configured to change a position to a first position and a second position in conjunction with a rotation of the end portion holding portion, the first position being a position in which the end portion of the second sheet material piece is held without overlapping the first sheet material piece when the support body is in the first posture, the second position being a position in which the end portion of the second sheet material piece is held in a state of overlapping the first sheet material piece when the support body is in the second posture.

[0018] By configuring the end portion holding portion to be capable of position change as described above, the end portion of the second sheet raw material piece can be disposed to an appropriate position in accordance with the attitude change of the support body.

[0019] The end portion holding portion can be configured to be rotatable independently of the rotation of the support body. According to this configuration, it is possible to prevent the end portion holding portion from coming into contact with the second sheet raw material piece when the surplus of the second raw material piece roll becomes small and the second raw material piece roll is replaced with another raw material piece roll. In addition, it is not necessary to use another end portion holding portion when the second raw material piece roll is replaced with another raw material piece roll, and the second raw material piece roll can be replaced with another raw material piece roll using the end portion holding portion that is common to the replacement of the first raw material piece roll with the second raw material piece roll. Therefore, it is possible to reduce equipment costs.

[0020] The joining device can include a second pressing member that fixes the first sheet raw material piece to a portion of the support device at a position separate from the first pressing member. The sheet raw material piece supply device can include a cutting device that cuts the first sheet raw material piece. The cutting device can include a cutting edge that cuts the first sheet raw material piece between the first pressing member and the second pressing member.

[0021] According to this configuration, it is possible to cut the first sheet raw material piece using the cutting edge in a state in which the first sheet raw material piece is fixed by the first pressing member and the second pressing member of the joining device immediately after the joining of a portion of the first sheet raw material piece with the end portion of the second sheet raw material piece is completed. Thus, it is possible to efficiently perform the joining operation of the sheet raw material pieces based on the joining device and the cutting operation of the first sheet raw material piece based on the cutting device.

[0022] Effects of the Invention

[0023] According to the present invention, it is possible to reliably perform the roll replacement. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a side view showing a manufacturing device of a glass plate bundle.

[0025] Figure 2 is Figure 1 is a bottom view of a sheet raw material piece supply device viewed along the II-II line of

[0026] Figure 3 is a sectional view of an end portion holding portion.

[0027] Figure 4 is a flowchart showing a roll replacement method.

[0028] Figure 5 is a side view showing an attitude change process of a roll replacement method.

[0029] Figure 6 is a side view showing a joining step of the roll exchange method.

[0030] Figure 7 is a side view showing a joining step and a cutting step of the roll exchange method.

[0031] Figure 8 is a side view showing a step of the roll exchange method. DETAILED DESCRIPTION

[0032] Hereinafter, an embodiment of the present application will be described with reference to the drawings.

[0033] Figure 1 A manufacturing apparatus of a glass plate bale is shown. The manufacturing apparatus 1 forms a protective sheet PS by cutting a sheet raw material piece OS1, OS2 drawn out from a raw material piece roll R1, R2. In addition, the manufacturing apparatus 1 loads a glass plate G on the protective sheet PS to a tray P. Thus, the manufacturing apparatus 1 manufactures the glass plate bale GP.

[0034] The glass plate G is constituted by cutting a long strip-shaped glass ribbon formed by, for example, a down-draw method into a rectangular shape. The down-draw method is a method in which molten glass is caused to flow into an overflow groove provided at an upper portion of a forming body having a substantially wedge-shaped cross section, the molten glass overflowing from the overflow groove to both sides is caused to flow down along side wall portions of both sides of the forming body and is integrated at a lower end portion of the forming body, thereby continuously forming a glass ribbon. The glass plate G is not limited to the down-draw method, and can be manufactured by a float method or other various forming methods.

[0035] The raw material piece rolls R1, R2 are constituted by winding the sheet raw material pieces OS1, OS2 around a roll core. As the sheet raw material pieces OS1, OS2, for example, a foamed resin sheet composed of a resin in which polyethylene is a main component is used, but is not limited to this structure. As the sheet raw material pieces OS1, OS2, a glass lining paper can also be used.

[0036] The manufacturing apparatus 1 is provided with a conveyance section 2 that conveys the glass plate G and a baling section 3 that bales the glass plate G to the tray P.

[0037] The conveyance section 2 is constituted by a conveyance device provided with a plurality of glass holding sections 4 that move the glass plate G. Each glass holding section 4 is three-dimensionally movable by a robot arm or other various moving mechanisms. Each glass holding section 4 has a chuck mechanism 5 capable of holding the glass plate G. The conveyance section 2 holds the upper portion of the glass plate G by the chuck mechanism 5 of the glass holding section 4, and conveys the glass plate G in such a manner that one surface of the glass plate G faces the moving direction thereof.

[0038] The bundling section 3 includes: a sheet material supply device 6; and a sheet forming device 7, which forms a protective sheet PS from the sheet materials OS1 and OS2 supplied by the sheet material supply device 6.

[0039] The sheet material supply device 6 has the function of changing the rolls of material materials R1 and R2. The sheet material supply device 6 includes: a support device 8, which supports the first roll of material material R1 and the second roll of material material R2; a connecting device 9, which connects the first sheet material OS1 of the first roll of material material R1 to the second sheet material OS2 of the second roll of material material R2; a cutting device 10, which is used to cut each sheet material OS1 and OS2; and a sensor 11, which measures the remaining amount of each sheet material OS1 and OS2 in each roll of material material R1 and R2.

[0040] In addition, various rollers are arranged along the path from the sheet material supply device 6 to the sheet forming device 7 to facilitate the smooth feeding movement of the sheet materials OS1 and OS2.

[0041] The support device 8 includes: a support body 12 that separates and supports the first material roll R1 and the second material roll R2; and a support shaft 13 that supports the support body 12 so that it can rotate.

[0042] like Figure 2 As shown, the support body 12 includes a pair of support plates 14 and a connecting member 15 that connects the support plates 14 to each other. Each support plate 14 is, for example, made of a long strip of metal plate. Each support plate 14 has a hole 16 in its middle portion through which a support shaft 13 can be inserted. The connecting member 15 is made of metal and connects the pair of support plates 14 by welding or other means.

[0043] The support body 12 includes a first support portion 17 supporting a first raw material roll R1, a second support portion 18 supporting a second raw material roll R2, and guide portions 19a to 19d for guiding sheet raw materials OS1 and OS2 pulled out from each raw material roll R1 and R2.

[0044] Each support portion 17 and 18 supports the core of the raw material rolls R1 and R2 so that they can rotate. Each support portion 17 and 18 is formed at each end in the longitudinal direction of the support plate 14 constituting the support body 12.

[0045] The guide portions 19a to 19d include first and second guide portions 19a and 19b that protrude in a direction orthogonal to the length direction of the support plate 14 that constitutes the support body 12, and third and fourth guide portions 19c and 19d that protrude in a direction opposite to the protruding directions of the first and second guide portions 19a and 19b. Each of the guide portions 19a to 19d is provided with a roller member 20 and a bracket 21 that rotatably supports the roller member 20. Note that the second and fourth guide portions 19b and 19d can be omitted, but from the viewpoint of miniaturizing the device by shortening the length of the bracket 21, it is preferable to provide the second and fourth guide portions 19b and 19d.

[0046] The support body 12 is capable of changing the attitude to a first attitude (see Figure 1 ) in which the first sheet material piece OS1 of the first raw material piece roll R1 can be fed to the sheet forming device 7, and a second attitude (see Figure 6 ) in which the first raw material piece roll R1 and the second raw material piece roll R2 can be exchanged. In a case where the support body 12 is in the first attitude, the end portions OSa of the first and second sheet material pieces OS1 and OS2 do not overlap. The first sheet material piece OS1 is pulled out from the first raw material piece roll R1 supported in the support body 12 in the first attitude, and is fed to the sheet forming device 7. The support body 12 is capable of overlapping the end portions OSa of the first and second sheet material pieces OS1 and OS2 by changing the attitude from the first attitude to the second attitude.

[0047] The support shaft 13 rotatably supports the support body 12 by being inserted into the hole 16 formed in the support plate 14 of the support body 12. The support body 12 is rotated about the support shaft 13 by being driven by a drive device not shown.

[0048] The joining device 9 is provided with pressing members 22a and 22b that fix the first sheet material piece OS1 to a prescribed position, and a holding member 23 that holds the end portion OSa of the second sheet material piece OS2.

[0049] The pressing members 22a and 22b include a first pressing member 22a that presses a portion of the first sheet material piece OS1 against the end portion OSa of the second sheet material piece OS2, and a second pressing member 22b that fixes the first sheet material piece OS1 to a portion of the support device 8 at a position separate from the first pressing member 22a. Each of the pressing members 22a and 22b is configured to be capable of changing the position to a standby position and a fixed position in which the first sheet material piece OS1 is fixed to a prescribed position.

[0050] The holding member 23 is provided with an end portion holding portion 24 that holds the end portion OSa of the second sheet material piece OS2, and a support portion 25 that supports the end portion holding portion 24.

[0051] The end portion holding section 24 is a long strip-shaped member having a length dimension larger than a width dimension of the second sheet material 0S2. The end portion holding section 24 holds the end portion OSa of the second sheet material 0S2 by suction. The end portion holding section 24 is configured in a hollow shape, and is connected to a suction pump not shown. As shown in Figure 3 The end portion holding section 24 has a holding surface 26 that holds the end portion OSa of the second sheet material 0S2 by suction, and a plurality of suction holes 27 formed so as to pass through a wall portion constituting the holding surface 26.

[0052] The end portion holding section 24 is configured so as to be positionally changeable to a first position at which the end portion OSa of the second sheet material 0S2 is held without overlapping the first sheet material 0S1 when the support body 12 is in the first attitude, and a second position at which the end portion OSa of the second sheet material 0S2 is held in a state of overlapping the first sheet material 0S1 when the support body 12 is in the second attitude.

[0053] The support section 25 is constituted by a pair of long strip-shaped members that support each end portion in the length direction of the end portion holding section 24, and is connected to a connecting section 28 that is connected to the support shaft 13 of the support device 8. The connecting section 28 is configured in a ring shape. The support shaft 13 is inserted through the inside of the connecting section 28. With this structure, the holding member 23 is supported by the support shaft 13 so as to be rotatable.

[0054] The holding member 23 is configured so as to be attitude-changeable to a first attitude (refer to Figure 1 ) in which it stands by with the end portion OSa of the second sheet material 0S2 held, and a second attitude (to be described later with reference to Figure 6 ) for joining the first sheet material 0S1 and the second sheet material 0S2. The holding member 23 is driven by a drive device not shown, and rotates around the support shaft 13, thereby changing its attitude. When the holding member 23 is in the first attitude, the end portion holding section 24 is disposed at the first position. When the holding member 23 is in the second attitude, the end portion holding section 24 is disposed at the second position.

[0055] The cutting device 10 has a cutting blade 10a configured so as to be approachable and distanced from the support body 12. The cutting blade 10a is configured so as to be positionally changeable to a standby position and a cutting position for cutting the first sheet material 0S1. The cutting blade 10a cuts the sheet materials 0S1, 0S2 at a position between the first pressing member 22a and the second pressing member 22b.

[0056] The sensor 11 is provided in a position near the first supporting portion 17 of the supporting body 12 in the first attitude. The sensor 11 is constituted by, for example, a laser sensor of a transmission type or a reflection type, but is not limited to this structure. The sensor 11 detects a case where the excess of the sheet raw material piece OS1, OS2 of the raw material piece roll R1, R2 is less than a prescribed amount.

[0057] As shown in FIG. 1, the sheet forming device 7 is provided with a cutting device 29 that cuts the sheet raw material piece OS1, OS2 drawn out from the raw material piece roll R1, R2 to form a protective sheet PS, a pair of first holding portions 30 and a pair of second holding portions 31 that are arranged below the cutting device 29 and hold the protective sheet PS after cutting, and guide members 32, 33 that support each of the holding portions 30, 31 so as to be movable. Figure 1

[0058] The cutting device 29 cuts the sheet raw material piece OS1, OS2 using a cutting blade 29a thereof in a state where a part of the sheet raw material piece OS1, OS2 is held by each of the holding portions 30, 31.

[0059] The pair of first holding portions 30 is constituted so as to hold both end portions in the width direction of the upper portion of the protective sheet PS, respectively. The pair of second holding portions 31 is constituted so as to hold both end portions in the width direction of the lower portion of the protective sheet PS, respectively. Each of the holding portions 30, 31 has a collet mechanism that holds the end portion in the width direction of the protective sheet PS formed by cutting the sheet raw material piece OS1, OS2.

[0060] The guide members 32, 33 include a first guide member 32 that causes each of the holding portions 30, 31 to approach and depart from the tray P in the front and rear directions, and a second guide member 33 that moves the first guide member 32 in the up and down directions.

[0061] The first guide member 32 is an elongated body that protrudes forward from the second guide member 33. The first guide member 32 is inclined downward at a prescribed angle with respect to the horizontal direction. The first guide member 32 supports each of the holding portions 30, 31 so as to be slidable in the length direction (front and rear direction) thereof on the upper surface side thereof. The first guide member 32 has a drive mechanism for moving each of the holding portions 30, 31 in the front and rear directions.

[0062] The second guide member 33 is an elongated body that extends in the up and down directions. The second guide member 33 is inclined at a prescribed angle with respect to the vertical direction. The second guide member 33 supports one end portion of the first guide member 32 so as to be movable in the up and down directions. The first guide member 32 is supported to the second guide member 33 in a manner that is perpendicular with respect to the second guide member 33. The second guide member 33 has a drive mechanism for moving the first guide member 32 in the up and down directions.

[0063] ​The second guide member 33 is suspended and supported on a base portion 34 disposed above the tray P. The base portion 34 is divided into two parts: a first base portion 35 and a second base portion 36. The first base portion 35 is fixed to a structural member of the building, i.e., a beam. The second base portion 36 is supported on the lower surface of the first base portion 35 in a manner that allows it to move in the front-rear direction.

[0064] The tray P, located in the bundling section 3, has a first support surface Pa that supports the surface of the glass plate G and a second support surface Pb that supports the lower end of the glass plate G. The first support surface Pa and the second support surface Pb intersect at a 90° angle. Through the operation of the conveying section 2 and the sheet forming device 7, the glass plate G and the protective sheet PS are alternately stacked on the tray P in a longitudinal orientation.

[0065] The following describes a method for manufacturing a glass plate bundle GP using the aforementioned manufacturing apparatus 1, and a method for changing the raw material rolls R1 and R2 during the implementation of this method. The method for manufacturing the glass plate bundle GP includes: a sheet supply step, in which a protective sheet PS is supplied to a tray P using a sheet raw material supply device 6 and a sheet supply device; and a loading step, in which a glass plate G is loaded onto the tray P using a transport unit 2. In this method, the sheet supply step and the loading step are performed simultaneously.

[0066] In the sheet feeding process, sheet raw materials are pulled out from the first raw material roll R1 supported by the support body 12 in the sheet raw material feeding device 6. The first sheet raw material OS1 is continuously transferred to the sheet forming device 7 through a predetermined transport path.

[0067] The support body 12 of the sheet material supply device 6 maintains the first posture (refer to...) Figure 1 The first support portion 17 supports the first material roll R1, which rotates due to the pulling out of the first material piece OS1. In this first posture, the second support portion 18 supports the second material roll R2 in the standby position.

[0068] In this case, the engaging device 9 holds the retaining member 23 in a first position (see reference). Figure 1 The device is then in standby mode. In this case, the end retaining portion 24 is located in a first position on the side of the second support portion 18. The end retaining portion 24 is in standby mode with the end OSa of the second material piece OS2 pulled out from the second material piece roll R2 supported by the second support portion 18 held in place. The end retaining portion 24 holds the end OSa of the second material piece OS2 with the retaining surface 26 facing downward. An adhesive member 37 is provided at this end OSa.

[0069] During the sheet feeding process, the guide portions 19a to 19d of the support device 8 remain in standby mode without contacting the sheet raw materials OS1 and OS2. The support body 12 is in its first posture (refer to...). Figure 4In the case of ), the first guide portion 19a and the second guide portion 19b face downwards, and the third guide portion 19c and the fourth guide portion 19d face upwards.

[0070] In the sheet feeding process, the sheet forming apparatus 7 cuts the first sheet material OS1 to a predetermined size to form a rectangular protective sheet PS. The sheet forming apparatus 7 then positions the protective sheet PS, held by the holding parts 30 and 31, at a predetermined position on the tray P.

[0071] During the placement process, the transport unit 2 temporarily stops the glass holding unit 4 when it approaches the tray P. Then, the glass holding unit 4 aligns the glass plate G with the protective sheet PS disposed on the tray P. When the glass plate G is placed on the second support surface Pb of the tray P, the glass holding unit 4 releases the grip of the glass plate G from the clamping mechanism 5 and moves to its receiving position to transport the next glass plate G.

[0072] By repeatedly performing the sheet feeding and loading processes, multiple glass sheets G are loaded onto the tray P through protective sheets PS. When a specified number of glass sheets G are loaded onto the tray P, the glass sheet bundle GP is completed.

[0073] In the manufacturing of the glass plate bundle GP, when the sensor 11 detects that the remaining amount of the first raw material piece OS1 of the first raw material roll R1 is less, the process of replacing the first raw material roll R1 with the second raw material roll R2 is performed (roll replacement process).

[0074] like Figure 5 As shown, the roll replacement process includes an attitude change process S1 for changing the attitude of the support body 12, a joining process S2 for joining the first raw material piece OS1 and the second raw material piece OS2, and a cutting process S3 for cutting the first raw material piece OS1.

[0075] In the attitude change process S1, the attitude of the support 12 changes from a first attitude to a second attitude. For example... Figure 6 As shown, the support device 8 rotates the support body 12 counterclockwise from the first posture (represented by the solid line) as shown by the double-dotted line, with the support shaft 13 as the center. The support body 12 rotates 180° from the first posture to the second posture.

[0076] In this case, the retaining member 23 of the engaging device 9 becomes integral with the support body 12 and rotates 180° counterclockwise. As a result, the retaining member 23 changes its posture from a first posture to a second posture. When the retaining member 23 reaches the second posture, the end retaining portion 24 moves to the second position. Figure 6 As shown, the end retaining part 24 holds the end OSa of the second piece OS2 in the second position with the retaining surface 26 facing upward.

[0077] In this state, the end holding portion 24 is positioned below the first pressing member 22a in the standby position. As shown in FIG. 6, when the support body 12 and the holding member 23 become the second attitude, and the end holding portion 24 moves to the second position, the end portion OSa of the first sheet material piece OS1 and the second sheet material piece OS2 become the state of being overlapped. Figure 6

[0078] With the change of the attitude of the support body 12, each guide portion 19a to 19d also changes its position. When the support body 12 becomes the second attitude, it becomes the state that the first guide portion 19a and the second guide portion 19b are directed upward, and the third guide portion 19c and the fourth guide portion 19d are directed downward.

[0079] The first guide portion 19a and the second guide portion 19b contact the first sheet material piece OS1 pulled out from the first material piece roll R1 during the change of the attitude of the support body 12 from the first attitude to the second attitude. The first guide portion 19a and the second guide portion 19b continue to support the first sheet material piece OS1 after the support body 12 becomes the second attitude. The first guide portion 19a and the second guide portion 19b guide the first sheet material piece OS1 to its feeding direction by the rotation of the roller member 20.

[0080] Thus, the generation of the slack of the first sheet material piece OS1 in the change of the attitude of the support body 12 and after the change of the attitude is prevented. In addition, the contact of the first sheet material piece OS1 with the end portion OSa of the second sheet material piece OS2, other members is also prevented.

[0081] In the joining process S2, the first pressing member 22a and the second pressing member 22b of the joining device 9 fix the first sheet material piece OS1. As shown in FIG. 7, the first pressing member 22a moves downward from the standby position, and contacts a part of the first sheet material piece OS1. The first pressing member 22a further moves downward, and presses a part of the first sheet material piece OS1 to the end portion OSa of the second sheet material piece OS2 positioned downward. Figure 7 Figure 7

[0082] As shown in FIG. 8, the second pressing member 22b approaches the first guide portion 19a from the standby position, and presses a part of the first sheet material piece OS1 to the roller member 20 of the first guide portion 19a. Thus, in the joining process S2, a part of the first sheet material piece OS1 is fixed to the first guide portion 19a and the end holding portion 24 of the holding member 23 by the first pressing member 22a and the second pressing member 22b. Figure 8

[0083] ​​​​In this case, a part of the first sheet raw material piece OS1 and the end portion OSa of the second sheet raw material piece OS2 are sandwiched by the first pressing member 22a and the end portion holding portion 24 of the holding member 23 via the adhesive 37. Thus, the adhesive 37 bonds and joins the first sheet raw material piece OS1 and the second sheet raw material piece OS2.

[0084] In the cutting process S3, the first sheet raw material piece OS1 is cut by the cutting blade 10a in a state where the first sheet raw material piece OS1 is fixed by the first pressing member 22a and the second pressing member 22b. The cutting blade 10a is lowered from the standby position and comes into contact with a part of the first sheet raw material piece OS1 between the first pressing member 22a and the second pressing member 22b. The cutting blade 10a cuts the first sheet raw material piece OS1, and thus the joining of the first sheet raw material piece OS1 and the second sheet raw material piece OS2 is completed.

[0085] After that, the cutting blade 10a, the first pressing member 22a, and the second pressing member 22b retreat toward the standby position. In addition, the end portion holding portion 24 of the holding member 23 releases the suction holding of the end portion OSa of the second sheet raw material piece OS2. Thus, the second sheet raw material piece OS2 joined to the first sheet raw material piece OS1 is pulled out from the second raw material roll R2 and supplied to the sheet forming device 7. The support body 12 maintains the second posture and continues to support the second raw material roll R2 until the next roll replacement process.

[0086] After that, a preparation process for the next roll replacement process is performed. In this preparation process, the used first raw material roll R1 is removed from the first support portion 17. Next, as shown by the double-dot chain line in Figure 8 , a new third raw material roll R3 is installed in the first support portion 17.

[0087] In the preparation process, the holding member 23 of the joining device 9 changes the posture from the second posture to the first posture. In this case, the holding member 23 rotates in a direction opposite to the direction of the rotation of the support body 12 and the holding member 23 in the roll replacement process. Specifically, the holding member 23 independently rotates clockwise with respect to the support body 12 as shown by the single-dot chain line and the double-dot chain line in ​ . When the holding member 23 rotates by 180° and changes the posture to the first posture, the new third raw material roll R3 is pulled out from the third sheet raw material piece, the end portion thereof is pulled out, and is suction-held by the end portion holding portion 24 of the holding member 23. The end portion OSa is coated with the adhesive 37.

[0088] In the next roll replacement process, the support body 12 is changed from the second attitude to the first attitude (attitude changing process S1) as in the previous roll replacement process, and the second sheet raw material piece OS2 in use is overlapped with the third sheet raw material piece of the third raw material piece roll R3. At this time, the second sheet raw material piece OS2 is supported by the third guide portion 19c and the fourth guide portion 19d.

[0089] After that, the second sheet raw material piece OS2 is fixed to the holding member 23 by the first pressing member 22a, and the second sheet raw material piece OS2 is fixed to the third guide portion 19c by the second pressing member 22b (joining process S2). After that, a part of the second sheet raw material piece OS2 is cut by the cutting blade 10a of the cutting device 10 (cutting process S3). Thus, the second sheet raw material piece OS2 is joined with the third sheet raw material piece.

[0090] According to the present embodiment described above, the joining device 9 stands by in a state where the end portion Osa of the second sheet raw material piece OS2 is held by the end portion holding portion 24 of the holding member 23, and continues to hold the end portion Osa also in the roll replacement process. Thus, it is possible to prevent the end portion Osa of the second sheet raw material piece OS2 from contacting other constituent members of the sheet raw material piece supply device 6 and hindering the roll replacement process.

[0091] The present application is not limited to the structure of the above-described embodiment, nor to the above-described effects. The present application can be variously changed within the scope of the gist of the present application.

[0092] In the above-described embodiment, an example in which the first sheet raw material piece OS1 and the second sheet raw material piece OS2 are joined by the adhesive 37 is shown, but the present application is not limited to this structure. The joining device 9 can join the first sheet raw material piece OS1 and the second sheet raw material piece OS2 by means other than adhesion. Also, even in the case of joining by the adhesive 37, the adhesive 37 is not limited to application, and can be provided by, for example, attaching double-sided tape.

[0093] Explanation of Reference Numerals

[0094] 6 Sheet raw material piece supply device

[0095] 8 Support device

[0096] 9 Joining device

[0097] 10 Cutting device

[0098] 10a Cutting blade

[0099] 12 Support body

[0100] 22a First pressing member

[0101] 22b second pressing member

[0102] 24 end holding portion

[0103] 26 holding surface

[0104] G glass sheet

[0105] OS1 first piece of raw material

[0106] OS2 second piece of raw material

[0107] OSa end portion of the second piece of raw material

[0108] PS protective sheet

[0109] R1 first raw material roll

[0110] R2 second raw material roll

Claims

1. A sheet material supply device for supplying sheet material for protective sheets that overlap with glass plates from a material roll. The feature of the sheet material supply device is that... The raw material roll includes a first raw material roll formed by winding a first raw material piece and a second raw material roll formed by winding a second raw material piece. The sheet material supply device includes a support device for supporting the first sheet material roll and the second sheet material roll, a joining device for joining a portion of the first sheet material roll to the end of the second sheet material roll in an overlapping state, and a cutting device for cutting the first sheet material roll. The joining device includes an end holding portion for holding the end of the second piece of material, a first pressing member for pressing a portion of the first piece of material against the end of the second piece of material, and a second pressing member for fixing the first piece of material to a portion of the support device at a position separate from the first pressing member. The first pressing member engages the first material piece and the second material piece by pressing and clamping a portion of the first material piece and the end of the second material piece against the end holding portion. The support device includes a support body for supporting the first raw material roll and the second raw material roll. The support body is configured to change its posture to a first posture and a second posture as the support body rotates. The first posture is in which the first piece of raw material does not overlap with the second piece of raw material and can be rolled out from the first piece of raw material. The second posture is in which the ends of the first piece of raw material and the second piece of raw material overlap. The end-holding portion is configured to change position to a first position and a second position as the end-holding portion rotates. The first position is a position in which the end of the second piece of material is held without overlapping with the first piece of material when the support body is in the first posture. The second position is a position in which the end of the second piece of material is held with overlapping with the first piece of material when the support body is in the second posture. The cutting device has a cutting blade that cuts the first piece of raw material between the first pressing member and the second pressing member. The support device includes a support plate that forms part of the support body. The sheet material supply device includes a guide portion protruding in a direction orthogonal to the length direction of the support plate. The second pressing member fixes the first piece of material by pressing it against the guide portion.

2. The sheet material supply device according to claim 1, wherein, The end retaining portion has a retaining surface for adsorbing and retaining the end of the second piece of raw material.

3. The sheet material supply device according to claim 1 or 2, wherein, The support device includes a support shaft that supports the support body in a rotatable manner. The end retaining portion is configured to rotate about the support axis independently of the rotation of the support body.

4. The sheet material supply device according to claim 1 or 2, wherein, The guide portion includes a first guide portion and a second guide portion for guiding the first piece of raw material, and a third guide portion and a fourth guide portion that protrude in the opposite direction to the protrusion direction of the first guide portion and the second guide portion and guide the second piece of raw material.

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