JP5168673B2 - Plate-shaped object conveyance amount detection apparatus, conveyance amount detection method, plate-shaped object cutting line processing apparatus, and line cutting method - Google Patents

Description

  The present invention relates to a plate-like material conveyance amount detection device, a conveyance amount detection method, a plate-like material cutting device, and a cutting method.

  As a manufacturing method of a glass plate used for an FPD (Flat Panel Display) glass substrate, an architectural glass plate, etc., a manufacturing method called a float method disclosed in Patent Document 1 is known. This float method is a manufacturing method in which molten glass is poured onto tin in a molten tin bath, the molten glass is spread on tin to form a glass ribbon, and finally formed into a strip-shaped plate glass having a predetermined plate thickness. The strip-shaped plate glass formed in the molten tin bath is drawn out to a slow cooling unit installed on the downstream side of the molten tin bath, cooled to a predetermined temperature here, and then transferred to a folding device by a conveying means such as a roller conveyor. It is continuously conveyed and cut and folded into a glass plate of a desired size. The cut and folded glass plates are conveyed to a predetermined storage unit by a roller conveyor, where they are stored one by one on a pallet or the like, and sampled as a product or an intermediate product.

  The cutting / folding device is composed of a slicing device installed on the upstream side in the conveying direction of the belt-shaped plate glass and a folding device installed on the downstream side thereof. The severing device is composed of a vertical slicing machine installed on the upstream side in the conveying direction of the strip-shaped plate glass, and a horizontal slicing machine installed on the downstream side thereof. A vertical cutting line parallel to the transport direction is processed into a strip-shaped plate glass, and a transverse cutting line orthogonal to the transport direction of the strip-shaped plate glass is processed into a strip-shaped plate glass on the downstream side by a cutter of a horizontal cutting line processing machine.

  The slicing process is carried out for the purpose of collecting a plurality of glass plates having different sizes from a strip-shaped plate glass that has been slowly cooled by a layer at a time without waste. In this cutting method, a plurality of vertical cutting machines are arranged in parallel, and a horizontal cutting machine is installed on the downstream side of the vertical cutting machine, and the cutting process of the cutter of each cutting machine is turned ON / OFF. By controlling (for example, motion control synchronized with the belt-shaped plate glass conveyance speed), a cutting line for collecting a plurality of glass plates of a desired size from the belt-shaped glass plate being conveyed is processed into a belt-shaped plate glass.

  In this different-size cutting line processing method, it is necessary to precisely control the cutting start timing of the cutter, and for this purpose, the transport speed of the strip-shaped plate glass is detected. As a transport speed detection device, a transport amount detection device that detects a strip glass transport speed based on a rotation amount of the roll that rotates while following the transport of the strip glass is known. It has been. This transport amount detection device detects the amount of roll rotation by an encoder, and counts the number of pulses output from the encoder by a pulse counter. Then, when the counted number of pulses reaches a predetermined number of pulses stored in advance as the cutting line processing start time, the control unit controls the cutter driving unit so as to start the cutting line processing by the cutter.

  The roll is composed of a metal roll body and a rubber or resin sheet lining the outer peripheral surface of the roll body. This sheet serves as a cushioning material so as not to be damaged by the roll coming into contact with the surface of the belt-shaped plate glass.

  Note that Patent Document 2 discloses a film (plate-like) transport amount detection device that is not a belt-like plate glass. This transport amount detection device is composed of a free roller that rotates following the transport of a film, and an encoder that detects the rotation of the free roller.

JP-A-8-277131 JP 2007-130810 A

  However, in the conventional transport amount detection device, the roll thermally expands and contracts according to the change in the ambient temperature, and the roll diameter and angular velocity (ω) change. For this reason, since the rotation amount of the roll fluctuates, there is a problem in that the transport amount of the plate-like object cannot be accurately detected.

  In particular, in the case of a roller for belt-shaped plate glass in which the outer peripheral surface of the roll body is covered with a rubber or resin sheet, the above-mentioned problem is likely to occur because the sheet is easily thermally expanded and contracted. Therefore, due to this problem, an error occurs at the cutting line processing start time of the cutter, so that there is a problem that the size of the cut and folded glass plate varies. That is, there has been a problem that the dimensional accuracy of the glass plate in the conveying direction of the belt-shaped plate glass is lowered.

  The present invention has been made in view of such circumstances, and a plate-like material conveyance amount detection device and a conveyance amount detection method capable of accurately detecting the conveyance amount of a plate-like material, and a plate-like material. It is an object of the present invention to provide a cutting device and a cutting method for a plate-like material capable of cutting with high accuracy.

In order to achieve the above object, the present invention provides a first roll that rotates in contact with a conveyed plate-like object, a second roll that rotates in contact with the first roll, and the rotation of the second roll. A signal generator that generates a signal according to the amount, and the first roll is lined on the outer peripheral surface of the metal roll body and the roll body and is in close contact with the plate-like object, and A sheet- like material conveyance amount detection comprising a rubber or resin sheet in contact with the second roll, wherein the second roll has a lower thermal expansion coefficient than the thermal expansion coefficient of the sheet. Providing equipment.

In order to achieve the above object, the present invention provides the sheet of the first roll composed of a metal roll body and a rubber or resin sheet lined on the outer peripheral surface of the roll body. in close contact to conveyed the plate-like workpiece to rotate the first roll, the contact to the sheet, rotating the second roll of low coefficient of thermal expansion than the thermal expansion coefficient of the sheet, rotation of the second roll A method for detecting a conveyance amount of a plate-like object is provided, wherein the conveyance amount of the plate-like object is detected from a signal generated according to the amount.

  According to the present invention, even if the first roll abutted against the plate-like object is thermally expanded and contracted and the angular velocity fluctuates, the peripheral speed of the first roll is unchanged, that is, the peripheral speed of the first roll is It was made paying attention to the fact that it is not affected by the diameter and angular velocity of one roll.

  According to the present invention, the second roll is brought into contact with the surface of the first roll whose diameter varies depending on the ambient temperature, the second roll is rotated at an invariable peripheral speed of the first roll, and the rotation amount of the second roll The conveyance amount of the plate-like object is detected from the signal generated according to the above. Thereby, according to the conveyance amount detection apparatus and conveyance amount detection method of the plate-shaped object of this invention, the conveyance amount of a plate-shaped object can be detected correctly. The second roll is preferably made of a low thermal expansion material.

The second roll of the present invention preferably has a thermal expansion coefficient of 12 × 10 ⁻⁶ / ° C. or less.

The second roll of the present invention preferably has a thermal expansion coefficient of 8 × 10 ⁻⁶ / ° C. or less.

In order to achieve the above object, the present invention provides a first roll that rotates in contact with a conveyed plate-like object, a second roll that rotates in contact with the first roll, and the rotation of the second roll. A signal generator that generates a signal according to the amount, a cutting machine that runs along the guide frame and cuts the plate-like object, and a cutting line of the plate-like object by the cutting machine based on the signal A control device for controlling the processing start time , wherein the first roll is lined on the outer peripheral surface of the metal roll main body, is in close contact with the plate-like object, and the second roll And a sheet-cutting device for a plate-like object, characterized in that the thermal expansion coefficient of the second roll is lower than the thermal expansion coefficient of the sheet. .

In order to achieve the above object, the present invention provides the sheet of the first roll composed of a metal roll body and a rubber or resin sheet lined on the outer peripheral surface of the roll body. in close contact to conveyed the plate-like workpiece to rotate the first roll, the contact to the sheet, rotating the second roll of low coefficient of thermal expansion than the thermal expansion coefficient of the sheet, rotation of the second roll There is provided a cutting method for cutting a plate-like object, characterized by controlling a cutting line starting time of the plate-like object by a cutting machine for cutting the plate-like object based on a signal generated according to the amount.

  According to the present invention, the second roll is brought into contact with the surface of the first roll whose diameter varies depending on the ambient temperature, the second roll is rotated at an invariable peripheral speed of the first roll, and the rotation amount of the second roll Based on the signal generated in response to this, the cutting start timing of the plate-like object by the cutting machine is controlled. Therefore, according to the cutting apparatus and the cutting method for a plate-like object of the present invention, the plate-like object can be cut with high accuracy, so that the plate-like object subjected to the cutting process in the conveying direction of the plate-like object. Dimensional accuracy is improved.

  According to the transport amount detection device and transport amount detection method of the present invention, the transport amount of the plate can be accurately detected.

  According to the cutting device and the cutting method for a plate-like object of the present invention, the plate-like object can be cut with high accuracy.

The perspective view which showed the principal part of the cutting apparatus of the strip | belt-shaped plate glass which concerns on embodiment Plan view of the slicing apparatus shown in FIG. The figure used to explain the cutting method using different sizes The block diagram which showed the structure of the cutting line processing apparatus of embodiment The block diagram which showed the structure of the conveyance amount detection apparatus of embodiment Roll arrangement diagram in which the second roll is arranged at a position inclined with respect to the vertical direction. Roll layout diagram with the second roll placed right next to the first roll

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a plate-like material conveyance amount detection device, a conveyance amount detection method, a plate-like material cutting device, and a cutting method according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view of a cutting apparatus 10 for a strip-shaped glass sheet G according to an embodiment to which the transport amount detection device 100 for the strip-shaped glass sheet G according to the embodiment is applied. FIG. 2 is a plan view of the slicing apparatus 10 shown in FIG.

  The cutting apparatus 10 shown in FIGS. 1 and 2 is continuously conveyed by a roller conveyor 12 from a sheet glass manufacturing apparatus (not shown) by a float method, which is installed upstream of the sheet glass G in the conveying direction. It is a slicing apparatus corresponding to a slicing method called so-called different size slicing, which processes a longitudinal slicing line and a horizontal slicing line on the belt-shaped plate glass G.

  The operation of each cutter of the slicing device 10 is controlled based on the transport amount of the belt-shaped plate glass G detected by the transport amount detection device 100 of the embodiment. This will be described later. The main purpose of installing the transport amount detection device 100 is to improve the dimensional accuracy of the glass plate cut by the cutting device 10 in the transport direction of the strip glass G. For this reason, the strip glass G Is accurately detected by the carry amount detection device 100.

  A glass folding device (not shown) is installed on the downstream side in the conveying direction of the strip-shaped plate glass G of the slicing apparatus 10, and the glass plate folded by the glass folding device is sized to the subsequent stage of the glass folding device. A roller conveyer (not shown) that distributes and conveys to the corresponding accommodating portion is installed.

  In addition, the structure of the conveyance amount detection apparatus 100 of the plate-shaped object of embodiment, and the conveyance amount detection method of the strip | belt-shaped plate glass G by the conveyance amount detection apparatus 100 are mentioned later. Further, the slicing apparatus 10, the belt-shaped plate glass manufacturing device, the roller conveyor, the glass folding device, the roller conveyor that sorts and conveys the glass plate after folding into the housing portion, and the belt-shaped plate glass using them. The manufacturing apparatus is as known in the art. Furthermore, the band-shaped plate glass G of the embodiment may be used for a glass substrate for FPD, and is used for a glass plate for solar cells, a glass plate for lighting, a glass plate for architecture, or a glass plate for automobile windows. It may be done. Further, the target plate-like object is not limited to the belt-like plate glass G, and may be a rectangular glass plate. The material of the plate-like material is not limited, and the plate-like material conveyance amount detection device 100 according to the embodiment can be used as long as it is a plate-like material made of resin or metal and continuously conveyed. Can be applied. Furthermore, the manufacturing apparatus of the strip-shaped plate glass G is not limited to the manufacturing apparatus by a float process, and other manufacturing apparatuses, such as a fusion method, may be sufficient.

  Hereinafter, although the cutting line processing apparatus 10 which performs different size cutting is demonstrated, the cutting line processing apparatus 10 is not limited to different size cutting. That is, if it is a slicing apparatus capable of improving the dimensional accuracy of the glass plate in the conveyance direction of the strip glass G, a slicing apparatus that processes only the so-called horizontal slicing line into the strip slab glass G (in FIG. It is also applicable to a cutting line processing apparatus provided only with Therefore, the slicing apparatus 10 that performs different size cutting is merely an example.

  The severing device 10 includes a vertical slicing machine 14 installed on the upstream side in the conveying direction of the belt-shaped plate glass G, and a horizontal slicing machine 16 installed on the downstream side thereof. A vertical cutting line parallel to the transport direction of the strip glass sheet G is processed into the strip glass sheet G by the vertical cutting machine 14, and a horizontal cutting line 16 perpendicular to the transport direction of the strip glass sheet is processed downstream by the horizontal cutting machine 16. To be processed.

  The vertical cutting line processing machine 14 includes a plurality of cutters 18, 18... Installed in the width direction of the belt-shaped plate glass G. These cutters 18, 18... Are moved forward and backward by a known forward / backward moving means with respect to the belt-like plate glass G being conveyed by the roller conveyor 12, and are pushed against the belt-like plate glass G by a predetermined pressing force. . Thereby, a longitudinal cut line parallel to the transport direction of the belt-shaped plate glass G is processed into the belt-shaped plate glass G.

  On the other hand, the transverse line processing machine 16 includes a single cutter 20, and the cutter 20 is moved obliquely with respect to the transport direction of the strip glass sheet G in synchronization with the transport speed of the strip glass sheet G. A transverse line in a direction orthogonal to the conveying direction of the belt-like plate glass G is processed into the belt-like plate glass G. In addition, the arrow A in FIG. 1, FIG. 2 has shown the conveyance direction of the strip | belt-shaped plate glass G. FIG.

  Here, a slicing method called “different size cutting” will be described with reference to FIG. 3.

  In this cutting line processing method, vertical cutting lines CV1 to CV5 and horizontal cutting lines CH6 to 11 for picking rectangular glass plates G1 and 2 having two different sizes from the belt-like sheet glass G being transported are strip-shaped being transported. This is a method of processing into a sheet glass G. In addition, the size of the glass plate to plate is not limited to two types, Three or more types may be sufficient. Further, an arrow A in FIG. 3 indicates a transport direction of the belt-shaped plate glass G.

  Vertical cutting lines CV1 and CV2 shown in FIG. 3 are processed in order to cut the edge glass G5 with which the edge roll is contacted in the molten tin bath of the belt-like plate glass manufacturing apparatus from the belt-like plate glass as a product, It is processed by two cutters 18, 18 arranged on both sides of the cutters 18, 18. The two cutters 18 and 18 are always brought into contact with the belt-like plate glass G in a state where a predetermined pressing force is applied, and thereby the cut-off depth favorable for folding is obtained on the belt-like plate glass G that is continuously conveyed. The vertical cutting lines CV1 and CV2 are continuously processed.

  The vertical cutting lines CV3, 4 are processed to plate the glass plates G1, G1,..., And the two cutters 18 arranged on the inner side among the cutters 18, 18. 18 is processed. The two cutters 18 and 18 are moved forward and backward (up and down) with respect to the belt-like plate glass G being conveyed in synchronization with the conveyance speed of the belt-like plate glass G by the advancing / retreating movement means. That is, the two cutters 18 and 18 for processing the vertical cutting lines CV3 and 4 are moved forward toward the cutting line processing start points P1 and P1 and are brought into contact with the belt-like plate glass G, and then, the predetermined cutters are applied to the belt-like plate glass G. The contact is continued in the state where the pressing force is applied, and the sheet is retracted from the belt-shaped plate glass G when reaching the cutting line finishing points P2, P2. As a result, the longitudinal cut lines CV3 and CV4 having a cutting depth that is favorable for folding are processed in the belt-like plate glass G that is continuously conveyed.

  The vertical cutting line CV5 is processed in order to sample a glass plate G2 having a size larger than the glass plate G1, and the cutter 18 disposed in the center of the cutters 18, 18. Processed. Similarly, the cutter 18 is also moved forward and backward (up and down) with respect to the belt-like plate glass G being conveyed in synchronization with the conveyance speed of the belt-like plate glass G by the advancing / retreating movement means. That is, the cutter 18 that processes the vertical cutting line CV5 is moved forward toward the cutting line starting point P3 and is brought into contact with the belt-like plate glass G, and then applied with a predetermined pressing force applied to the belt-like plate glass G. The contact is continued, and when the cutting line finishing point P4 is reached, it is retracted from the strip glass sheet G. As a result, the longitudinal cut line CV5 having a cutting depth that is favorable for folding is processed in the belt-like plate glass G that is continuously conveyed.

  The advancement start time (cutting line start time) and retreat start time of the three cutters 18 for processing the vertical cutting lines CV3 to CV5 are controlled by the transport amount detection device 100 (see FIG. 1) of the embodiment. Yes. This will be described later.

  On the other hand, the horizontal cutting lines CH6 to 9 are processed in order to sample the glass plate G1, and are sequentially processed one by one by the cutter 20 of the horizontal cutting line processing machine 16. The motor 64 (see FIG. 4) that moves the cutter 20 in a skew manner is controlled in motion by the control device 56 in synchronization with the transport speed of the belt-like plate glass G, whereby the belt-like plate glass G is transported. Transverse lines CH6 to 9 in the direction perpendicular to the direction are processed into the strip-shaped glass sheet G. The cutter 20 is provided so as to be movable up and down with respect to the belt-like plate glass G by an actuator such as an air cylinder. With this actuator, the cutter 20 starts to descend in advance at a position a predetermined amount before the cutting line processing start point P5 in order to process the horizontal cutting lines CH6 to CH9 having a good cutting depth. Thereafter, the cutter 20 is moved obliquely on the belt-like plate glass G along the guide frame 21 by the driving force of the motor 64. Thereby, the transverse lines CH6 to 9 are processed. Thereafter, the cutter 20 is moved upward from the strip-shaped plate glass G by the actuator after passing through a predetermined amount of the cutting line finishing point P6, and then moved to the original cutting line standby position (the position indicated by the solid line in FIGS. 1 and 2). The motor 64 is moved back.

  The horizontal cutting lines CH10 and 11 shown in FIG. 3 are processed to sample the glass plate G2, and are processed by the cutter 20 of the horizontal cutting line processing machine 16. Since the operation of the cutter 20 is the same as the operation for processing the transverse lines CH6 to CH9, the description thereof is omitted.

  The skew movement start time (cut line processing start time) of the cutter 20 for processing the horizontal cutting lines CH6 to 11 is controlled by the transport amount detection device 100 (see FIG. 1) of the embodiment. This will be described later.

  In this way, the above-described operations of the cutters 18, 18... For processing the vertical cut lines and the cutter 20 for processing the horizontal cut lines are used to sample the rectangular glass plates G1 and 2 having two different sizes from the belt-like plate glass G being conveyed. The vertical cutting lines CV1 to CV5 and the horizontal cutting lines CH6 to 11 are processed into the belt-like plate glass G being conveyed.

  In the cutting process for cutting different sizes, in order to sample as many different glass plates as possible from the strip-shaped glass sheet G without waste, the vertical cutting line machine 14 is used according to the sampling schedule of each specified size glass plate. It is desired to reduce the distance between the ends of the vertical cutting lines CV3 to 5 and the horizontal cutting lines CH6 to 11 by the horizontal cutting line machine 16 as much as possible. Therefore, in order to reduce the distance, the cutting line cutting operation of the cutter 18 of the vertical cutting line processing machine 14 that processes the vertical cutting lines CV3 to 5 and the cutter 20 of the horizontal cutting line processing machine 16 that processes the horizontal cutting lines CH6 to 11 is turned ON. / OFF control, that is, the forward / backward movement control of the cutters 18 and 20 with respect to the belt-like plate glass G being transported, must be precisely performed, and this is executed by the transport amount detection device 100 (see FIG. 1) of the embodiment. ing.

  The forward / backward moving means of the cutter 18 includes a servo motor 24 as shown in FIG. 4, and the servo motor 24 and the cutter 18 are moved to a beam portion (guide frame) 26 in FIG. It is attached with a predetermined interval. The beam portion 26 is provided across the roller conveyor 12 and in a direction orthogonal to the conveying direction of the belt-like plate glass G. Further, the ball screw device as the feeding means is provided in the hollow beam portion 26, and when this ball screw device is driven, the cutter 18 advances and retreats in a horizontal slit 28 formed in the beam portion 26. It is slid through the moving means. Thereby, the position of the cutter 18 in the direction orthogonal to the conveyance direction of the strip-shaped plate glass G is adjusted.

  The servo motor 24 moves the cutter 18 downward in order to process a vertical cut line on the belt-like plate glass G, and generates a pressing force on the belt-like plate glass G. The torque of the servo motor 24 is controlled by a control device 56 via a servo amplifier 54 shown in FIG. Therefore, by controlling the torque of the servo motor 24 by the control device 56, the pressing force of the cutter 18 against the belt-like plate glass G is set.

  The control device 56 also includes a signal indicating a current value applied to the servomotor 24 (a signal indicating the torque of the servomotor 24) together with data applied from the current detector 60, as well as the rotational position or rotational speed of the servomotor 24. Is added from a pulse generator (PG) 62 via a servo amplifier 54. The control device 56 can detect the rotational position of the servo motor 24 by counting the pulse signal from the pulse generator (PG) 62, and can count the pulse signal applied within a predetermined time, The rotational speed of the servo motor 24 can be detected. Further, the control device 56 sends a torque command signal for controlling the torque of the servo motor 24 to the servo amplifier 54 based on the signal indicating the torque from the current detector 60 or the pulse signal from the pulse generator (PG) 62. Output. The servo amplifier 54 controls the torque of the servo motor 24 based on the command signal.

  Furthermore, the control device 56 controls the advance / retreat movement timing of the cutter 18 by the servomotor 24 based on the line speed (conveyance speed of the belt-like plate glass G) output from the conveyance amount detection device 100 of the embodiment, and also the motor 64. The cutting line start time of the cutter 20 is controlled. As a result, the control device 56 causes the cutters 18 and 20 to perform cutting processing of different sizes.

  Next, the operation of the cutting apparatus 10 for the strip-shaped glass sheet G configured as described above will be described.

  The slicing device 10 is applied to the strip glass G being transported by the roller conveyor 12, and to the longitudinal strips CV 3 to 5 parallel to the transport direction of the strip glazing G by the cutters 18, 18. Will be omitted). Then, as a means for moving the cutter 18 forward and backward with respect to the belt-shaped plate glass G, a servo motor 24 having high responsiveness is used. By controlling the torque of the servo motor 24 by the control device 56, the pressing force of the cutter 18 against the belt-shaped plate glass G can be reduced. The vertical cut lines CV3 to CV5 are processed in the belt-shaped plate glass G by controlling.

  Next, the transport amount detection device 100 according to the embodiment will be described.

  As shown in FIGS. 1, 2, and 5, the transport amount detection device 100 rotates in contact with the first roll 102 that rotates in contact with the belt-like plate glass G that is being transported, and in contact with the first roll 102. In addition to the second roll 104, an encoder (signal generator) 106 that generates a pulse signal according to the rotation amount of the second roll 104 as shown in FIG. 5 is provided.

  That is, the method for detecting the amount of transport of the belt-shaped plate glass G by the transport amount detection device 100 is such that the first roll 102 is brought into contact with the belt-shaped plate glass G being transported and the first roll 102 follows the transport of the belt-shaped plate glass G. The second roll 104 that is in contact with the first roll 102 is rotated by following the first roll 102 and is rotated based on the pulse signal generated from the encoder 106 according to the rotation amount of the second roll 104. The conveyance amount of the plate glass G is detected.

  The first roll 102 includes a metal roll body 108 and a rubber or resin sheet 110 lining the outer peripheral surface of the roll body 108. The sheet 110 serves as a cushioning material so that the surface of the belt-like plate glass G is not damaged by the first roll 102 coming into contact therewith. Moreover, since the sheet | seat 110 adheres to the surface of the strip | belt-shaped plate glass G, since the slip of the 1st roll 102 with respect to the strip | belt-shaped plate glass G is prevented, the detection accuracy of the conveyance amount of the strip | belt-shaped plate glass G is improved.

In the transport amount detection device 100 of the embodiment, even if the first roll 102 brought into contact with the belt-like plate glass G via the sheet 110 is thermally expanded and contracted and the angular velocity (ω ₁ ) fluctuates, The peripheral speed (Vt) is unchanged, that is, the peripheral speed (Vt) of the first roll 102 is made not to be influenced by the diameter and angular velocity of the first roll 102.

That is, according to the transport amount detection device 100 of the embodiment, the second roll 104 is brought into contact with the surface of the sheet 110 of the first roll 102 whose diameter varies depending on the ambient temperature, and the invariable circumference of the first roll 102 is changed. The second roll is rotated at the speed (Vt), and the transport amount of the belt-like plate glass G is detected based on the pulse signal generated from the encoder 106 in accordance with the angular speed (ω ₂ ) rotation amount of the second roll 104.

Thereby, according to the conveyance amount detection apparatus 100 of embodiment, the conveyance amount of the strip | belt-shaped plate glass G can be detected correctly, and, as a result, the conveyance direction of the strip | belt-shaped plate glass G of the cut glass plate is carried out. Dimensional accuracy is improved. The second roll 104 is preferably made of a low thermal expansion material, but is not limited thereto. That is, the second roll 104 may have a thermal expansion coefficient (linear expansion coefficient) of 12 × 10 ⁻⁶ / ° C. or less, and preferably 8 × 10 ⁻⁶ / ° C. or less. Further, it is more preferable to manufacture with a low thermal expansion material of 1 × 10 ⁻⁶ / ° C. or less. If the thermal expansion coefficient of the second roll 104 is 12 × 10 ⁻⁶ / ° C. or less, 8 × 10 ⁻⁶ / ° C. or less, and 1 × 10 ⁻⁶ / ° C. or less, the strip when the ambient temperature changes by 1 ° C. The dimensional accuracy (dimensional error) at a length of 1 m in the conveying direction of the glass sheet G can be 0.012 mm or less, 0.008 mm or less, and 0.001 mm or less, respectively.

  The material of the second roll is not particularly limited as long as it satisfies the thermal expansion coefficient, and iron, carbon steel, chrome steel, stainless steel (SUS410), titanium, platinum, invar, super invar, stainless invar, or the like. Can be mentioned.

  On the other hand, according to the cutting apparatus 10 for strip glass G to which the transport amount detection device 100 is applied, the rotation amount of the second roll 104 is detected by the encoder 106, and the number of pulses output from the encoder 106 is determined by the pulse counter 112. Count by. On the other hand, a predetermined number of pulses that are determined as the cutting line starting time are stored in advance in the storage unit (not shown) of the control device 56.

  Then, when the number of pulses counted by the pulse counter 112 reaches the predetermined number of pulses stored in the storage unit, the controller 56 causes the cutter 18 and 20 to start the cutting process by the cutters 18 and 20. The servo motor 24 is controlled, and the motor 20 of the cutter 20 is controlled.

  The storage unit stores the number of pulses corresponding to the lengths of the vertical cut lines CV1 to CV5. At the timing when the number of pulses is counted by the pulse counter 112, the control device 56 controls the servo motor 24 of the cutter 18 to move the cutter 18 away from the belt-shaped plate glass G.

  As described above, according to the slicing apparatus 10 of the embodiment, the transport amount detection device 100 that can accurately detect the transport amount of the belt-like plate glass G is used, and the signal output from the transport amount detection device 100 is used. Based on this, the cutting start timing of the cutters 18 and 20 and the retreat movement timing of the cutter 18 are determined, so that the strip-shaped plate glass G can be cut with high accuracy.

  Moreover, it is preferable to control also the glass folding time of the glass folding apparatus (not shown) installed in the downstream of the cutting line processing apparatus 10 based on the conveyance amount information from the conveyance amount detection apparatus 100. Thereby, the strip | belt-shaped plate glass G can be folded correctly along the vertical cutting lines CV3-5 and horizontal cutting lines CH6-11.

  In the embodiment, the second roll 104 is arranged above the first roll 102 in the vertical direction. However, the present invention is not limited to this, and as shown in FIG. May be disposed at a position that is inclined or just beside the first roll 102 as shown in FIG.

  G ... strip-shaped plate glass, 10 ... cutting line processing device, 12 ... roller conveyor, 14 ... vertical cutting line processing machine, 16 ... horizontal cutting line processing machine, 18 ... cutter, 20 ... cutter, 21 ... guide frame, 22 ... parallel link mechanism, 24 DESCRIPTION OF SYMBOLS ... Servo motor, 26 ... Beam part, 28 ... Slit, 30 ... Support plate, 32 ... Ball nut part, 34, 36, 38, 40 ... Rotary shaft, 42, 44 ... Rotary arm, 46 ... Cutter support rod, 48 ... Upper bracket, 50 ... Lower bracket, 52 ... Shock absorbing member, 54 ... Servo amplifier, 56 ... Controller, 58 ... Line speed detector, 60 ... Current detector, 62 ... Pulse generator (PG), 64 ... Motor DESCRIPTION OF SYMBOLS 100 ... Conveyance amount detection apparatus 102 ... 1st roll 104 ... 2nd roll 106 ... Encoder 108 ... Roll body 110 ... Sheet | seat 112 ... Pulse Counter

Claims (6)

A first roll that rotates in contact with the conveyed plate-like object;
A second roll rotating in contact with the first roll;
A signal generator for generating a signal according to the amount of rotation of the second roll;
Equipped with a,
The first roll includes a metal roll body, a rubber or resin sheet that is lined on the outer peripheral surface of the roll body, is in close contact with the plate-like object, and is in contact with the second roll. Consisting of
The apparatus for detecting a conveyance amount of a plate-like object , wherein a thermal expansion coefficient of the second roll is lower than a thermal expansion coefficient of the sheet . The plate-like material transport amount detection device according to claim 1, wherein the second roll has a coefficient of thermal expansion of 12 × 10 ⁻⁶ / ° C. or less. The plate-like material transport amount detection device according to claim 1, wherein the second roll has a coefficient of thermal expansion of 8 × 10 ⁻⁶ / ° C. or less. The sheet of the first roll composed of a metal roll body and a rubber or resin sheet lined on the outer peripheral surface of the roll body is brought into close contact with the transported plate-like object. rotates the first roller and abuts on the sheet, rotating the second roll of low coefficient of thermal expansion than the thermal expansion coefficient of the sheet, the plate-like material from a signal generated according to the amount of rotation of the second roll A method for detecting a conveyance amount of a plate-like object, wherein the conveyance amount of the plate-like object is detected. A first roll that rotates in contact with the conveyed plate-like object;
A second roll rotating in contact with the first roll;
A signal generator for generating a signal according to the amount of rotation of the second roll;
A cutting machine that travels along the guide frame and cuts the plate-like material;
A control device for controlling the cutting start timing of the plate-like object by the cutting machine based on the signal ,
The first roll includes a metal roll body, a rubber or resin sheet that is lined on the outer peripheral surface of the roll body, is in close contact with the plate-like object, and is in contact with the second roll. Consisting of
An apparatus for cutting a plate-like material, wherein the second roll has a thermal expansion coefficient lower than that of the sheet. The sheet of the first roll composed of a metal roll body and a rubber or resin sheet lined on the outer peripheral surface of the roll body is brought into close contact with the transported plate-like object. Based on a signal generated in accordance with the amount of rotation of the second roll by rotating one roll and rotating a second roll having a thermal expansion coefficient lower than the thermal expansion coefficient of the sheet in contact with the sheet. A cutting method for cutting a plate-like object, comprising: controlling a cutting start timing of the plate-like object by a cutting machine for cutting the sheet-like object.

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