Method and apparatus for manufacturing glass plates

Abstract

A method for manufacturing a glass plate comprises a first processing process in which the end surface (ES) of the glass plate (G) is processed by a first processing device (2A), and a second processing process in which the end surface (ES) of the glass plate (G) is processed by a second processing device (2B) after the first processing process. A position adjustment mechanism (8B) of the second processing device (2B) adjusts the cutting position of the second processing device (5B) of the second processing device (2B) in the second processing process so as to follow the position of the first processing tool (5A) of the first processing device (2A) in the first processing process.

Description

Technology Field

[0001] The present invention relates to a method and apparatus for manufacturing a glass plate. Background Technology

[0002] In displays such as liquid crystal displays, glass plates are used as substrates or cover glass. In the manufacture of these glass plates, one or more glass plates are cut from a large glass plate (molding plate). By doing this, glass plates of desired dimensions can be obtained.

[0003] On the other hand, minute scratches (defects) may exist on the end surfaces of glass plates cut from the original glass plate. If there are scratches on the end surfaces of the glass plates, cracks or other defects may occur from those scratches. To prevent such problems, grinding (roughing) or polishing (finishing) is performed on the end surfaces of the glass plates, for example.

[0004] As a device used for this type of processing, for example, Patent Document 1 discloses a processing device comprising a support member (arm member) that supports a processing tool and a pressure mechanism (servo mechanism) that generates a force in the support member for the processing tool to press against the end surface of a glass plate.

[0005] In this processing device, one end of the support member rotatably supports the processing tool. The other end of the support member is connected to a pressing mechanism. The middle part of the support member is supported by a support shaft member. The support member changes its position by rotating around the support shaft member as a center (axis).

[0006] The pressing mechanism is equipped with a link mechanism connected to the other end of a support member and a servo motor that drives the link mechanism. By driving the link mechanism with the servo motor, the pressing mechanism controls the position (rotation angle) of the support member so that the pressing force of the processing tool against the end surface of the glass plate becomes constant. Prior art literature

[0007] Japanese Patent Publication No. 2017-30089 The problem to be solved

[0008] In the above processing device, by maintaining a constant pressure applied by the processing tool through a support member and a pressure mechanism, the end surface of the glass plate can be processed to a desired amount.

[0009] However, the pressure applied to the workpiece by the pressure mechanism varies strictly according to the position of the workpiece. For example, in the case of the pressure mechanism described in Patent Document 1, even if the torque of the servo motor is kept constant, the pressure applied to the workpiece changes depending on the position (rotation angle) of the support member. For this reason, for example, when the dimensions of the glass plate change during cutting, or when a misalignment occurs in the glass plate during processing by the workpiece, it becomes difficult to control the pressure of the workpiece by the pressure mechanism with high precision. In this case, there was a risk that the amount of processing would become excessive or insufficient due to the fluctuation of the pressure.

[0010] The present invention has been made in consideration of the above circumstances, and the technical problem is to process the end surface of a glass plate to a desired amount of processing. means of solving the problem

[0011] The present invention aims to solve the above problem and comprises a first processing process for processing the end surface of a glass plate by a first processing device and a second processing process for processing the end surface of the glass plate by a second processing device after the first processing process, wherein the first processing device comprises a first processing tool for processing the end surface of the glass plate and a first pressing mechanism for applying a pressing force to the first processing tool to press the end surface of the glass plate, and the second processing device comprises a second processing tool for processing the end surface of the glass plate, a second pressing mechanism for applying a pressing force to the second processing tool to press the end surface of the glass plate, and a position adjustment mechanism for changing the cutting position of the second processing tool relative to the end surface of the glass plate by moving the second pressing mechanism, and the position adjustment mechanism is such that the position in the second processing process follows the position of the first processing tool in the first processing process. It is characterized by adjusting the above-mentioned cutting position of the second processing tool.

[0012] According to this configuration, by adjusting the cutting position of the second processing tool (the position of the second pressing mechanism) by means of a position adjustment mechanism according to the cutting position of the first processing tool in the first processing process, it becomes possible to move the second pressing mechanism to a suitable position according to the shape or position of the end surface of the glass plate. By doing so, the pressing force applied to the second processing tool by the second pressing mechanism can be kept constant, and it becomes possible to process the end surface of the glass plate with a desired amount of processing.

[0013] In the present method, the second pressing mechanism may comprise a support member that supports the second processing member and changes its position by rotating around a predetermined axis, a link mechanism connected to the support member, and a servo motor that drives the link mechanism.

[0014] In a second pressure mechanism equipped with a support member and a link mechanism, the pressure applied to the second processing member is prone to change depending on the position (rotation angle) of the support member. When the present invention is applied to such a second pressure mechanism, the effect of processing the end surface of a glass plate to a desired amount of processing becomes even more pronounced.

[0015] In the present method, the position adjustment mechanism may adjust the cutting position of the second processing tool so that the posture of the support member becomes constant.

[0016] According to this configuration, the position of the support member becomes approximately constant by adjusting the cutting position of the second processing member by the position adjustment mechanism, so that an optimal pressure can be applied to the second processing member to process the end surface of the glass plate. For example, in the conventional method, the variation in the position (rotation angle) of the support member is about ±2°, but according to the present invention, the variation in the position (rotation angle) of the support member can be reduced to about ±0.7°.

[0017] In the present method, in the first processing step and the second processing step, the first processing tool and the second processing tool may be moved relatively along a predetermined transfer direction with respect to the glass plate. By doing so, the entire end surface of the glass plate can be processed with high precision.

[0018] The present invention aims to solve the above problem and comprises a first processing device for processing the end surface of a glass plate, a second processing device for processing the end surface of the glass plate processed by the first processing device, and a control device, wherein the first processing device comprises a first processing tool for processing the end surface of the glass plate and a first pressing mechanism for applying a pressing force to the first processing tool to press the end surface of the glass plate; the second processing device comprises a second processing tool for processing the end surface of the glass plate, a second pressing mechanism for applying a pressing force to the second processing tool to press the end surface of the glass plate, and a position adjustment mechanism for changing the cutting position of the second processing tool relative to the end surface of the glass plate by moving the second pressing mechanism; and the control device, by operating the position adjustment mechanism, [manifests] the second [manifests] in the second processing device to follow the position of the first processing tool in the first processing device. It is characterized by adjusting the above-mentioned cutting position of the processing tool.

[0019] According to this configuration, by adjusting the cutting position of the second processing tool (the position of the second pressing mechanism) by means of a control device and a position adjustment mechanism according to the cutting position of the first processing tool in the first processing device, it becomes possible to move the second pressing mechanism to a suitable position according to the shape or position of the end surface of the glass plate. By doing so, the pressing force applied to the second processing tool by the second pressing mechanism can be kept constant, and it becomes possible to process the end surface of the glass plate with a desired amount of processing. Effects of the invention

[0020] According to the present invention, the end surface of a glass plate can be processed to a desired amount. Brief explanation of the drawing

[0021] Figure 1 is a plan view showing a glass plate manufacturing apparatus. Figure 2 is a side view of a manufacturing apparatus along the arrow line II-II of Figure 1. Figure 3 is a functional block diagram of the control device. Figure 4 is a plan view showing the first process of a method for manufacturing a glass plate. Figure 5 is a plan view showing the first process of a method for manufacturing a glass plate. Specific details for implementing the invention

[0022] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIGS. 1 to 5 show an embodiment of a method for manufacturing a glass plate according to the present invention.

[0023] FIGS. 1 to 3 illustrate a glass plate manufacturing apparatus used in the present method. The manufacturing apparatus (1) comprises a first processing apparatus (2A), a second processing apparatus (2B), a moving apparatus (3) for moving the first processing apparatus (2A) and the second processing apparatus (2B), and a control apparatus (4) for controlling each processing apparatus (2A, 2B) and the moving apparatus (3). As shown in FIG. 1, the manufacturing apparatus (1) processes the end surface (ES) of a glass plate (G) while moving each processing apparatus (2A, 2B) in a predetermined transfer direction (X) by the moving apparatus (3).

[0024] As shown in FIGS. 1 and 2, the first processing device (2A) comprises a first processing tool (5A), a first driving device (6A) for driving the first processing tool (5A), a first pressing mechanism (7A) for applying a force to press a glass plate (G) against the first processing tool (5A), and a first position adjustment mechanism (8A) for adjusting the position of the first processing tool (5A) by moving the first pressing mechanism (7A).

[0025] The second processing device (2B) is equipped with a second processing tool (5B), a second driving device (6B) for driving the second processing tool (5B), a second pressing mechanism (7B) for applying force to press a glass plate (G) on the second processing tool (5B), and a second position adjustment mechanism (8B) for adjusting the position of the second processing tool (5B) by moving the second pressing mechanism (7B).

[0026] Each processing tool (5A, 5B) is composed of, for example, a rotatable grinding wheel (grinding wheel or polishing wheel). Each processing tool (5A, 5B) is connected to each driving device (6A, 6B) and is rotatably supported on a part of each pressing mechanism (7A, 7B).

[0027] Each driving device (6A, 6B) is configured by an electric motor that rotates each processing tool (5A, 5B). As the electric motor, a synchronous motor, an induction motor, a servo motor, etc., are used. Each driving device (6A, 6B) is supported by a part of each pressing mechanism (7A, 7B).

[0028] As shown in FIGS. 1 and 2, each pressing mechanism (7A, 7B) comprises an arm member (9) as a supporting member that rotatably supports each processing member (5A, 5B), a driving unit (10) that drives the arm member (9), and a support (11) that supports the arm member (9) and the driving unit (10).

[0029] The arm member (9) is composed of, for example, a plate member with a long rod shape, but the shape of the arm member (9) is not limited to this embodiment. One end of the arm member (9) supports the processing tool (5A, 5B) and the driving device (6A, 6B). The other end of the arm member (9) is connected to the driving unit (10).

[0030] The middle portion of the arm member (9) is supported by the support shaft member (12). The arm member (9) is configured to rotate (oscillate) with the support shaft member (12) as the center (axis). By rotating, the arm member (9) can adjust the position (hereinafter referred to as the "cutting position") of the processing tool (5A, 5B) in the direction (hereinafter referred to as the "cutting direction") (Y) that is orthogonal to the transfer direction (X). In other words, by rotating, the arm member (9) can adjust the force (pressure) with which the processing tool (5A, 5B) presses against the glass plate (G).

[0031] The driving unit (10) is equipped with a link mechanism (13) connected to an arm member (9) and an electric motor (14) that drives the link mechanism (13).

[0032] Each link mechanism (13) comprises a first link member (15) and a second link member (16). One end of the first link member (15) is fixed to the shaft (rotation shaft) (14a) of the electric motor (14), and the other end is rotatably connected to the second link member (16) through a first joint (17). One end of the second link member (16) is connected to the first link member (15), and the other end is rotatably connected to the end of the arm member (9) through a second joint (18).

[0033] The pressing mechanism (7A, 7B) applies the rotational force of the shaft portion (14a) of the electric motor (14) as a moment to the arm member (9) by means of this link mechanism (13). The arm member (9) generates a pressing force against the glass plate (G) in the processing member (5A, 5B) by means of this moment.

[0034] The electric motor (14) is configured, for example, by a servo motor. The electric motor (14) drives the link mechanism (13) to maintain a constant pressure of each processing member (5A, 5B) on the glass plate (G). That is, the electric motor (14) adjusts the driving force on the arm member (9) by the link mechanism (13) based on torque through its feedback control.

[0035] The pressure mechanism (7A, 7B) is connected to the control device (4) so ​​as to be communicable. The pressure mechanism (7A, 7B) can transmit information to the control device (4) regarding the torque of the electric motor (14) or the rotation angle of the shaft part (14a).

[0036] As shown in FIG. 2, the support (11) has a first support member (11a) that supports the arm member (9) through a support shaft member (12), and a second support member (11b) that supports the first support member (11a).

[0037] The first support member (11a) is configured in a plate shape or a block shape, but the shape of the first support member (11a) is not limited to the present embodiment. The first support member (11a) supports the electric motor (14) of the compression mechanism (7A, 7B) in addition to the support shaft member (12). The second support member (11b) is exemplified as a long member extending in the vertical direction, but the shape of the second support member (11b) is not limited to the present embodiment. The upper part of the second support member (11b) is connected to the lower part of the first support member (11a). The lower part of the second support member (11b) is supported by the position adjustment mechanism (8A, 8B).

[0038] The position adjustment mechanism (8A, 8B) is equipped with a driving unit (19) that moves the support (11) of the pressure mechanism (7A, 7B). The driving unit (19) is configured by a linear actuator, such as a ball screw mechanism or a linear servo motor, driven by a servo motor, for example. The position adjustment mechanism (8A, 8B) can move the second support (11b) of the support (11) linearly along the cutting direction (Y) by means of the driving unit (19). That is, the position adjustment mechanism (8A, 8B) adjusts the cutting position of the processing tool (5A, 5B) by moving the pressure mechanism (7A, 7B).

[0039] The moving device (3) is positioned below each processing device (2A, 2B). The moving device (3) is composed of various conveying devices, such as a rail conveying device. The moving device (3) is equipped with a guide part (20) that guides the position adjustment mechanism (8A, 8B). By moving the position adjustment mechanism (8A, 8B) in the conveying direction (X), the moving device (3) moves each processing device (2A, 2B) along the length direction of the end surface (ES) of the glass plate (G). Also, the glass plate (G) is fixed to the suction plate (SP).

[0040] The moving device (3) is not limited to the above configuration and may move the processing device (5A, 5B) and the glass plate (G) relatively along the transport direction (X). The moving device (3) may, for example, transport the glass plate (G) in the transport direction (X) while keeping each processing device (2A, 2B) fixed without moving it in the transport direction (X).

[0041] The control device (4) includes a computer (e.g., PC, control panel) that is equipped with various hardware such as a CPU, ROM, RMM, HDD, monitor, input / output interface, etc.

[0042] As shown in FIG. 3, the control device (4) comprises an operation processing unit (21) that performs various operations, a memory unit (22) that stores data or various programs required for processing a glass plate (G), a driving device control unit (23) that performs control of a driving device (6A, 6B), a pressure mechanism control unit (24) that performs control of a pressure mechanism (7A, 7B), a position adjustment mechanism control unit (25) that performs control of a position adjustment mechanism (8A, 8B), and a moving device control unit (26) that performs control of a moving device (3). These components are connected to each other by a bus.

[0043] The calculation processing unit (21) performs calculation processing necessary for controlling the driving device (6A, 6B), pressing mechanism (7A, 7B), position adjustment mechanism (8A, 8B), and moving device (3) based on various data and various programs stored in the memory unit (22).

[0044] The memory unit (22) stores data according to the dimensions of the glass plate (G), data according to the type, rotation speed, and feed speed of the processing tool (5A, 5B), and data obtained from the compression mechanism (7A, 7B). In addition, the memory unit (22) stores various programs for controlling the driving device (6A, 6B), compression mechanism (7A, 7B), position adjustment mechanism (8A, 8B), and moving device (3).

[0045] The drive device control unit (23) cooperates with the computation processing unit (21) to transmit a control signal to the drive device (6A, 6B). By doing so, the drive device control unit (23) performs control such as starting and stopping the electric motor and changing the rotational speed in the drive device (6A, 6B).

[0046] The pressure mechanism control unit (24) cooperates with the computation processing unit (21) to transmit a signal necessary for feedback control of the pressure mechanisms (7A, 7B) to the pressure mechanisms (7A, 7B). By doing so, the pressure mechanism control unit (24) controls the pressure applied to the processing member (5A, 5B) by the pressure mechanisms (7A, 7B).

[0047] The pressure mechanism control unit (24) inputs data regarding the rotation angle of the shaft portion (14a) of the electric motor (14) received from the pressure mechanism (7A, 7B) into the calculation processing unit (21). Based on this data regarding the rotation angle, the calculation processing unit (21) can calculate the cutting position of each processing tool (5A, 5B). The calculation processing unit (21) can calculate a correction value that adjusts the cutting position of the second processing tool (5B) according to the cutting position of the first processing tool (5A).

[0048] The position adjustment mechanism control unit (25) cooperates with the computation processing unit (21) to transmit a control signal to the position adjustment mechanism (8A, 8B). By doing so, the position adjustment mechanism control unit (25) controls the cutting position of each processing device (2A, 2B) (processing device (5A, 5B)).

[0049] The moving device control unit (26) transmits a control signal to the moving device (3) in cooperation with the computation processing unit (21). By doing so, the moving device control unit (26) controls the movement speed of each processing device (2A, 2B) in the transfer direction (X).

[0050] Hereinafter, a method for manufacturing a glass plate (G) using the above-mentioned manufacturing device (1) will be described.

[0051] The present method comprises, for example, an end surface processing process in which the end surface (ES) of a glass plate (G) cut from a large glass plate is processed by each processing device (2A, 2B). The end surface processing process comprises a first processing process in which the end surface (ES) of the glass plate (G) is processed by a first processing device (2A), and a second processing process in which the end surface (ES) of the glass plate (G) is processed by a second processing device (2B) after the first processing process. In this embodiment, an example is shown in which the first processing process is a grinding process and the second processing process is a polishing process, but the present method is not limited to this configuration. Specifically, the first processing process and the second processing process may both be grinding processes or both may be polishing processes.

[0052] The first processing process and the second processing process are executed by moving the first processing device (2A) and the second processing device (2B) simultaneously in the feed direction (X) while separated. In this case, the first processing device (2A) grinds the end surface (ES) of the glass plate (G) first, and the subsequent second processing device (2B) polishes the end surface (ES) of the glass plate (G). It is preferable that the speed of movement in the feed direction (X) of the first processing device (2A) and the speed of movement in the feed direction (X) of the second processing device (2B) are the same.

[0053] As shown in FIG. 4, the processing tool (5A, 5B) has a reference position (RP) (reference position) indicated by a dotted line with respect to the cutting position.

[0054] In the first processing process and the second processing process, the control device (4) controls the pressure mechanism (7A, 7B) so that each processing tool (5A, 5B) processes the end surface (ES) of the glass plate (G) by a constant pressure.

[0055] In addition, the control device (4) controls the second position adjustment mechanism (8B) to adjust the cutting position of the second processing tool (5B) according to the cutting position of the first processing tool (5A) that processes the end surface (ES) of the glass plate (G) in advance (position adjustment process).

[0056] Hereinafter, the position adjustment process of the second processing tool (5B) by the control device (4) will be explained with reference to FIGS. 4 and FIGS. 5.

[0057] As shown in FIGS. 4 and 5, when a convex portion (P) exists on the end surface (ES) of the glass plate (G), the cutting position of the first processing member (5A) changes when the first processing member (5A) passes through the convex portion (P). Due to the change in the cutting position of the first processing member (5A), the arm member (9) of the first pressing mechanism (7A) rotates and changes its position. The link mechanism (13) rotates the first link member (15) and the second link member (16) according to the change in the position of the arm member (9). By this, the shaft portion (14a) of the electric motor (14) connected to the link mechanism (13) rotates.

[0058] The electric motor (servo motor) (14) of the first pressing mechanism (7A) detects the rotation angle and torque of the shaft portion (14a) and controls the torque to be constant so that the pressing force of the first processing piece (5A) is maintained constant (feedback control). In addition, the first pressing mechanism (7A) transmits information (signal) regarding the angle of the shaft portion (14a) detected by the electric motor (14), that is, information (signal) regarding the cutting position of the first processing piece (5A), to the pressing mechanism control unit (24) of the control device (4). The pressing mechanism control unit (24) inputs the angle information of the shaft portion (14a) to the calculation processing unit (21).

[0059] As shown in FIG. 5, when the cutting position of the first processing tool (5A) changes, a difference (D) occurs between the cutting position of the first processing tool (5A) and the cutting position of the second processing tool (5B) (reference position (RP)). The computational processing unit (21) of the control device (4) calculates the cutting position of the first processing tool (5A) based on angle information according to the shaft portion (14a) of the electric motor (14) received from the first processing device (2A) (first pressing mechanism (7A)). The computational processing unit (21) calculates the cutting position of the second processing tool (5B) based on angle information according to the shaft portion (14a) of the electric motor (14) received from the second processing device (2B) (second pressing mechanism (7B)).

[0060] The calculation processing unit (21) calculates the difference (D) between the cut position of the first processing unit (5A) and the cut position of the second processing unit (5B). The calculation processing unit (21) sets this difference (D) as a correction value for adjusting the cut position of the second processing unit (5B). The control device (4) transmits a control signal according to the correction value (D) calculated by the calculation processing unit (21) to the second position adjustment mechanism (8B) through the position adjustment mechanism control unit (25).

[0061] The second position adjustment mechanism (8B) moves the support (11) of the second pressure mechanism (7B) along the cutting direction (Y) based on a control signal according to a correction value (D) received from the control device (4). By doing so, the cutting position of the second processing tool (5B) is changed. The second processing device (2B) performs polishing of the convex portion (P) by the second processing tool (5B) using the changed cutting position of the second processing tool (5B) as the reference position (RP). By performing the above position adjustment over the entire length of the end surface (ES) of the glass plate (G), the second processing tool (5B) moves to follow the first processing tool (5A) and polishes the entire end surface (ES) of the glass plate (G) with a constant pressure.

[0062] According to the manufacturing method and manufacturing apparatus (1) of the glass plate (G) according to the embodiment described above, by adjusting the cutting position of the second processing tool (5B) (position of the second pressing mechanism (7B)) by the second position adjustment mechanism (8B) according to the cutting position of the first processing tool (5A) in the first processing process, it becomes possible to move the second pressing mechanism (7B) to a suitable position according to the shape or position of the end surface (ES) of the glass plate (G). In addition, by adjusting the cutting position of the second processing tool (5B) by the second position adjustment mechanism (8B), the arm member (9) in the second pressing mechanism (7B) can be positioned in a suitable posture to maintain the pressing force of the second processing tool (5B) constant. By this, the pressure applied to the second processing member (5B) by the second pressure mechanism (7B) can be kept constant, and it becomes possible to process the end surface (ES) of the glass plate (G) with a desired amount of processing.

[0063] As a result, for example, even if the end surface (ES) of the glass plate (G) is not straight in the longitudinal direction and a part of it deviates from the planned cutting line, it becomes possible to process the end surface (ES) of the glass plate (G) with a desired amount of processing. Alternatively, even if a positional misalignment occurs in the glass plate (G) during the first processing process and the second processing process, it becomes possible to process the end surface (ES) of the glass plate (G) with a desired amount of processing. Therefore, the position determination of the glass plate (G) during end surface processing can be simplified.

[0064] Furthermore, the present invention is not limited to the configuration of the above-described embodiments, nor is it limited to the aforementioned effects. Various modifications are possible within the scope of the present invention without departing from the essence of the invention.

[0065] In the above embodiment, an example of processing the end surface (ES) of a glass plate (G) by a first processing device (2A) and a second processing device (2B) has been shown, but the number of processing devices for processing the glass plate (G) is not limited to this embodiment. In the above embodiment, processing the glass plate (G) with the first processing device (2A) as the lead was illustrated, but it is not limited to this; any processing device among a plurality of processing devices may be designated as the first processing device, and any subsequent processing device may be designated as the second processing device, and the present invention may be applied. Explanation of the symbols

[0066] 1 : Manufacturing device 2A: 1st processing device 2B: Second processing device 4: Control unit 5A: 1st processing section 5B: Second processing tool 7A: 1st pressing mechanism 7B: Second compression mechanism 8B: Second position adjustment mechanism 9 : Arm member (support member) 13 : Linkage mechanism 14 : Electric motor (servo motor) ES: End surface of the glass plate G : Glass plate X : Transfer direction

Claims

Claim 1 A method for manufacturing a glass plate comprising a first processing process for processing the end surface of a glass plate by a first processing device, and a second processing process for processing the end surface of the glass plate by a second processing device after the first processing process, wherein the first processing device comprises a first processing tool for processing the end surface of the glass plate and a first pressing mechanism for applying a pressing force to the first processing tool to press the end surface of the glass plate, and the second processing device comprises a second processing tool for processing the end surface of the glass plate, a second pressing mechanism for applying a pressing force to the second processing tool to press the end surface of the glass plate, and a position adjustment mechanism for changing the cutting position of the second processing tool relative to the end surface of the glass plate by moving the second pressing mechanism, and wherein the second in the second processing process follows the position of the first processing tool in the first processing process by means of a control device that controls the position adjustment mechanism. A method for manufacturing a glass plate, comprising a position adjustment process for adjusting the cutting position of a processing tool, wherein in the position adjustment process, the control device acquires position information of the first processing tool after movement when the first processing tool moves from a reference position set at the first processing tool of the first processing device, and calculates a position correction value for the second processing tool based on the position information of the first processing tool and the information of a reference position set at the second processing tool of the second processing device, and wherein in the position adjustment process, the control device adjusts the cutting position of the second processing tool based on the correction value. Claim 2 A method for manufacturing a glass plate according to claim 1, wherein the second pressing mechanism comprises a support member that supports the second processing member and changes its position by rotating around a predetermined axis, a link mechanism connected to the support member, and a servo motor that drives the link mechanism. Claim 3 In claim 2, the position adjustment mechanism adjusts the cutting position of the second processing tool so that the posture of the support member becomes constant. A method for manufacturing a glass plate. Claim 4 A method for manufacturing a glass plate according to any one of claims 1 to 3, wherein in the first processing process and the second processing process, the first processing tool and the second processing tool are moved relatively along a predetermined transfer direction with respect to the glass plate. Claim 5 A glass plate manufacturing apparatus comprising a first processing device for processing the end surface of a glass plate, a second processing device for processing the end surface of the glass plate processed by the first processing device, and a control device, wherein the first processing device comprises a first processing tool for processing the end surface of the glass plate and a first pressing mechanism for applying a pressing force to the first processing tool to press the end surface of the glass plate; the second processing device comprises a second processing tool for processing the end surface of the glass plate, a second pressing mechanism for applying a pressing force to the second processing tool to press the end surface of the glass plate, and a position adjustment mechanism for changing the cutting position of the second processing tool relative to the end surface of the glass plate by moving the second pressing mechanism; and the control device adjusts the cutting position of the second processing tool in the second processing device to follow the position of the first processing tool in the first processing device by operating the position adjustment mechanism. A glass plate manufacturing apparatus configured such that, when the first processing tool moves from a reference position set at the first processing tool of the first processing device, the control device acquires position information of the first processing tool after the movement, and calculates a position correction value for the second processing tool based on the position information of the first processing tool and the information of a reference position set at the second processing tool of the second processing device, and the control device adjusts the cutting position of the second processing tool based on the correction value.

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