JP2013184838A - Apparatus and method for processing cutting line of plate-like object, and apparatus and method for producing glass plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and method for processing cutting lines of a plate-like object, by means of which the plate-like material can be cut with good dimensional accuracy, and to provide an apparatus and method for producing a glass plate.SOLUTION: Information representing a distance between two lines or a length of a cut glass plate Gin the transfer direction, imaged by electronic cameras 104A, 104B, is outputted to a control device 24. The control device 24 compares the distance or the length with a prestored reference value, and searches change amount of the distance or the length. Then the control device 24 changes the traveling speed of a cutter 20 by controlling a servomotor 22 based on the change amount.

Description

  The present invention relates to a cutting device for a plate-like material, a cutting method for a plate-like material, a manufacturing device for a glass plate and a manufacturing method for a glass plate.

  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. In this float process, molten glass is poured onto tin in a molten tin bath, the molten glass is spread over the tin to an equal thickness, a glass ribbon is formed, and finally a strip having a predetermined thickness. This is a method of forming into a glass plate.

  The strip-shaped glass plate formed in the molten tin bath is drawn out to a slow cooling section installed on the downstream side of the molten tin bath, cooled to a predetermined temperature (room temperature), and then transported by a roller conveyor or the like. It is continuously conveyed to a cutting and folding device and cut into a glass plate of a desired size. The cut glass plate is transported to a predetermined storage section by a roller conveyor, where it is stored one by one on a pallet or the like and taken out as a product or an intermediate product.

  The cutting and folding apparatus disclosed in Patent Document 2 is installed on the downstream side in the conveyance direction, and the cutting line processing apparatus (also referred to as the breaking line processing apparatus or the cutting line processing apparatus) installed on the upstream side in the conveyance direction of the belt-shaped glass plate. And the folded device. Further, the severing device is composed of a vertical slicing machine installed on the upstream side in the transport direction of the belt-shaped glass plate and a horizontal slicing machine installed on the downstream side thereof, such as a wheel cutter of the vertical slicing machine, etc. A vertical cutting line parallel to the transport direction of the strip-shaped glass plate is processed on the surface of the strip-shaped glass plate by a cutter, and a transverse plane perpendicular to the transport direction of the strip-shaped glass plate is cut downstream by a cutter such as a wheel cutter of a horizontal cutting line processing machine. Cut the cut line on the surface of the glass strip.

  The cutter for processing the transverse cut line is supported by a guide frame so as to be able to travel. The guide frame is downstream in the transport direction with respect to the direction perpendicular to the transport direction of the belt-shaped glass sheet transported at the transport speed v. Is arranged in a posture inclined at an angle θ. The cutter is travel controlled at a speed w (w = v / cos θ) along the guide frame by a driving means such as a servo motor. As a result, a transverse line perpendicular to the transport direction is processed on the surface of the belt-shaped glass plate by the cutter.

  The slicing method using the cutter is a method called cutting with different sizes, and is performed for the purpose of collecting a plurality of glass plates having different sizes from a strip-shaped glass plate that has been gradually cooled in a slow cooling section at once without waste. ing. In this cutting method, a plurality of vertical cutting machines are arranged side by side, and a horizontal cutting machine is installed downstream of the vertical cutting machines, and the cutting / cutting operation of the cutters of each cutting machine is controlled. (For example, motion control synchronized with the conveyance speed of the belt-shaped glass plate), by which a cutting line for picking a plurality of glass plates of a desired size from the belt-shaped glass plate being transported is processed into a belt-shaped glass plate. .

  In the cutting process for cutting different sizes, it is necessary to precisely control the cutting start timing of the cutter, and for this purpose, the conveyance speed of the strip glass plate is detected. As the transport speed detection device, there is a transport amount detection device that detects a transport speed based on a rotation amount of the roller that contacts a belt-shaped glass plate being transported and rotates following the transport of the belt-shaped glass plate. Are known.

  The transport amount detection device detects the rotation amount of the roller 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 roller includes a metal roller main body and a rubber or resin sheet lining the outer peripheral surface of the roller main body. This sheet serves as a cushioning material so as not to be damaged by the roller coming into contact with the surface of the belt-shaped glass plate.

JP-A-8-277131 WO2008 / 136239

  However, in the conventional transport amount detection device, the roller thermally expands and contracts according to the change in the ambient temperature, and the diameter and angular velocity of the roller change. For this reason, since the rotation amount of the roller fluctuates, it is difficult to accurately detect the conveyance speed v of the plate-like object.

  Therefore, even if the cutter controls the predetermined transverse line, for example, the cutter speed w as described above (w = v / cos θ), the predetermined transverse line perpendicular to the conveyance direction is formed on the surface of the belt-shaped glass plate. There was a problem that it could not be processed. That is, since the actual transverse line is inclined with respect to a predetermined transverse line orthogonal to the conveyance direction, the perpendicularity of the actual transverse line with respect to the conveyance direction of the belt-shaped glass plate may deviate from the allowable value.

  The perpendicularity is defined in the machine tool-test and inspection terms in JIS B 0182 (established in 1993). The perpendicularity described in the present specification is defined as one of the two lines defined in the above definition as a line along the transport direction of the belt-shaped glass plate and the other line as an actual transverse line. The squareness.

  The present invention has been made in view of such circumstances, and a plate-like material cutting device, a plate-like material cutting method, and a glass plate manufacturing method capable of cutting and cutting a plate-like material with dimensional accuracy. An object is to provide an apparatus and a method for producing a glass plate.

  In order to achieve the above object, the present invention provides a roller that rotates in contact with a conveyed plate-like object, a signal generating means for generating a signal corresponding to the amount of rotation of the roller, and the plate based on the signal. A plate-shaped object conveyance amount detecting means having a calculating means for calculating the amount of conveyance of the sheet-like object, a score line processing means, and the sheet-cutting means in the direction inclined by a predetermined angle with respect to the sheet material conveying direction. Driving means for processing a cut line on the surface of the plate-like object by running on the surface of the plate-like object, cutting means for cutting the plate-like object along the cut line, and the plate-like material subjected to the cut line processing Measuring means for measuring an interval between two cutting lines adjacent to each other or a length in a conveying direction of the cut plate-like object, a reference value for the interval or the length is stored, and the reference value and the measurement Comparing the interval or the length measured by the means A control unit that obtains a change amount of the interval or the length measured by the measurement unit with respect to the reference value, and that controls the driving unit based on the change amount to change a traveling speed of the cutting line processing unit; And a cutting apparatus for cutting a plate-like material.

  In order to achieve the above object, the present invention rotates the roller by bringing the roller of the conveyance amount detection means into contact with the plate-like object being conveyed, and sends a signal corresponding to the rotation amount of the roller from the signal generation means. A plate-shaped object conveyance amount detecting step for calculating the conveyance amount of the plate-shaped object by the calculating means based on the signal, and a driving means for setting the cutting line processing means to a predetermined direction with respect to the conveyance direction of the plate-shaped object. By running on the surface of the plate-like object in a direction inclined at an angle, a cutting process for cutting a cut line on the surface of the plate-like object, and cutting the plate-like object along the cut line by a cutting means. A cutting step, a measuring step of measuring, by a measuring means, an interval between two adjacent cutting lines of the cut plate-like object or a length in a conveying direction of the cut plate-like object, and the interval or the length Is stored in the control means, The control means compares the reference value with the interval or the length measured by the measuring means to determine the change amount of the interval or the length measured by the measuring means with respect to the reference value, and And a control step of changing the traveling speed of the slicing means by controlling the driving means on the basis of the amount of change.

  According to the present invention, the information indicating the interval between the two cut lines measured by the measuring unit or the length in the transport direction of the cut plate-like object is output to the control unit. The control means compares the interval or the length with a reference value stored in advance to determine the amount of change in the interval or the length. And a control means controls a drive means based on the variation | change_quantity, and changes the traveling speed of a slicing means. Thereby, according to this invention, even when the diameter of a roller changes, a plate-shaped object can be cut with high dimensional accuracy.

  Further, the control means of the cutting apparatus for cutting a plate-like object according to the present invention controls the driving means so that the perpendicularity of the cutting line with respect to the conveying direction of the plate-like object falls within an allowable value. It is preferable to change the traveling speed of the means.

  Moreover, in the cutting method for a plate-like object of the present invention, in the control step, the control means controls the driving means so that the perpendicularity of the cutting line with respect to the conveying direction of the plate-like object falls within an allowable value. It is preferable to control and change the traveling speed of the slicing means.

  Thereby, according to this invention, the cut line of the direction orthogonal to the conveyance direction of a plate-shaped object can be processed.

  The permissible value is a value according to the product standard of a plate-like product that is cut along a cutting line and commercialized. If the perpendicularity is within the allowable value, it is assumed that a cut line perpendicular to the conveying direction of the plate-like object has been processed.

  Moreover, this invention provides the manufacturing apparatus of the glass plate characterized by including the cutting apparatus for cutting the plate-shaped object of this invention, in order to achieve the said objective.

  Moreover, this invention provides the manufacturing method of the glass plate characterized by providing the cutting method of the sheet-like thing of this invention, in order to achieve the said objective.

  According to the glass plate manufacturing apparatus and the glass plate manufacturing method of the present invention, the glass plate can be cut and cut with high dimensional accuracy.

  According to the cutting device and the cutting method for a plate-like material, and the glass plate manufacturing apparatus and the glass plate manufacturing method according to the present invention, the cutting and cutting processing of the plate-like material and the glass plate with high dimensional accuracy are performed. it can.

The perspective view which showed the principal part of the cutting line processing apparatus which concerns on embodiment Plan view of the slicing apparatus shown in FIG. 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 Explanatory drawing which showed the cutting | disconnection edge part imaged with the electronic camera Plan view of a strip-shaped glass plate with a horizontal cut line processed by shifting the processing start point of the horizontal cut line The figure explaining changing the traveling speed of the cutter which processes a transverse line The perspective view of the cutting line processing apparatus of other embodiment Plan view of the cutting apparatus shown in FIG.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a sheet cutting device and sheet cutting method, a glass plate manufacturing apparatus, and a glass plate manufacturing method according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a main part of a cutting device 10 for a glass strip (plate) G to which a cutting device for a plate-like material according to an embodiment is applied. FIG. 2 is a plan view of the slicing apparatus 10 shown in FIG.

  A cutting line processing apparatus 10 shown in FIGS. 1 and 2 is continuously provided in a direction indicated by an arrow A by a roller conveyor 12 from a glass sheet manufacturing apparatus (not shown) by a float method installed on the upstream side in the conveying direction of the glass band G. This is a slicing apparatus corresponding to a slicing method called so-called different size slicing, in which a vertical slicing line and a horizontal slicing line are processed on the belt-shaped glass plate G that is conveyed in a normal manner.

  The glass plate manufacturing method by the glass plate manufacturing apparatus of the embodiment to which the embodiment is applied includes the glass melting step by the molten glass manufacturing apparatus, the molding step of forming the molten glass into a strip glass plate, and the strip shape A slow cooling process for gradually cooling the glass plate, a cutting step for cutting the strip glass plate along the cutting line while processing the cut line by the cutting line processing apparatus of the embodiment, a chamfering step for chamfering the edge of the cut glass plate, A polishing step of polishing the principal surface of the chamfered glass plate, and a packing step of packing the polished glass plate. In addition, when the glass plate to be packed is an intermediate product, the chamfering process and the polishing process are not performed, and the process proceeds from the cutting process to the packing process.

  Further, the slicing device 10 is provided with a transport amount detection device 100. The transport amount detection device 100 includes a roller 102 that is in contact with the surface of the strip-shaped glass plate G and rotates following the transport of the strip-shaped glass plate G. The operation of each cutter of the slicing apparatus 10 is basically controlled based on the transport amount (transport speed v) of the band-shaped glass plate G detected by the transport amount detection device 100. However, it is difficult to accurately detect the actual conveyance amount by the conveyance amount detection device 100 as described above, and the slicing apparatus 10 according to the embodiment solves such a problem. This will be described later.

The downstream side of the belt-like glass plate G of the cut line processing device 10, the folding device (cutting means) 52 is installed, the subsequent folding device 52, the glass plate G _A cut by the folding device 52, size A roller conveyor (not shown) for sorting and transporting the plates to the accommodating portion corresponding to the plate is installed.

The transport amount detecting apparatus 100, the band-shaped glass plate manufacturing apparatus, the roller conveyor, the folding device 52, and the roller conveyor for Toita to sorting conveyor in the housing portion of the cut glass sheet G _A, and using the same The apparatus for producing a strip-shaped glass plate is as known in the art. Moreover, the strip-shaped glass plate G of embodiment may be used for the glass substrate for FPD, and is used for the glass plate for solar cells, the glass plate for illumination, the glass plate for construction, or the glass plate for automobile windows. It may be used. Furthermore, the target plate-like object is not limited to the belt-like glass plate G, and may be a rectangular glass plate. The material of the plate-like object is not limited, and the cut line processing apparatus 10 according to the embodiment can be used as long as it is a resin-made or metal plate-like object and the cut line is processed while being continuously conveyed. Applicable. Furthermore, the manufacturing apparatus of the strip glass plate G is not limited to the manufacturing apparatus by the float process, and may be another manufacturing apparatus such as a fusion method.

  Moreover, although the cutting line processing apparatus 10 of embodiment is an apparatus which performs different size cutting, it is not limited to different size cutting. That is, if it is a slicing apparatus that can improve the dimensional accuracy of the glass sheet in the conveying direction A of the strip-shaped glass sheet G, a slicing apparatus that processes only the so-called horizontal section line on the surface of the strip-shaped glass sheet G (in FIG. 1). The present invention can also be applied to a cutting line processing apparatus provided with only the horizontal cutting line processing machine 16. 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 transport direction of the belt-shaped glass plate G, and a horizontal slicing machine 16 installed on the downstream side in the transporting direction. A vertical cutting line parallel to the conveying direction of the strip glass plate G is processed into the strip glass plate G by the vertical cutting line processing machine 14, and a horizontal cutting line orthogonal to the transport direction of the strip glass plate G is formed downstream by the horizontal cutting line machine 16. It is processed into a strip-shaped glass plate G.

  The direction of the transverse line processed by the transverse line processing machine 16 is not limited to the direction orthogonal to the conveying direction of the band-shaped glass sheet G, but is a horizontal line inclined at a predetermined angle with respect to the orthogonal direction. May be.

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

  On the other hand, the horizontal cutting line processing machine 16 includes a single cutter (cutting line processing means) 20. The cutter 20 is supported by a guide frame 26 installed above the transport path of the belt-shaped glass plate G so that the guide frame 26 is inclined at a predetermined angle with respect to the transport direction A of the belt-shaped glass plate G. Are arranged. When the cutter 20 is run obliquely with respect to the transport direction of the strip glass plate G in synchronization with the transport speed of the strip glass plate G, a horizontal cut line (cut line) in a direction perpendicular to the transport direction of the strip glass plate G is formed. It is processed on the surface of the band-shaped glass plate G. The speed control of the cutter 20 that is a feature of the present invention will be described later.

FIG. 3 is a block diagram illustrating a configuration of the slicing apparatus 10 according to the embodiment. As shown in the figure, the servo motor 22 (driving means) that drives the cutter 20 is motion-controlled by a control device (control means) 24. The control device 24 controls the servo motor 22 based on the transport amount of the belt-shaped glass sheet G output from the transport amount detection device 100, and basically controls the traveling speed of the cutter 20, but the control device of the embodiment. 24 controls the servo motor 22 based on the change amount with respect to the reference value of the interval length or transection line along the conveying direction of the glass plate G _a to be described later, to change the running speed of the cutter 20. That is, the travel distance of the cutter 20 that travels per pulse output from an encoder (not shown) of the transport amount detection device 100 is changed. As a result, a transverse line in a direction orthogonal to the conveying direction of the band-shaped glass plate G is processed on the surface of the band-shaped glass plate G.

  Further, the cutter 20 is provided so as to be movable up and down with respect to the belt-like glass plate G by an actuator such as an air cylinder. By this actuator, the cutter 20 starts to descend in advance at a position a predetermined amount before the cutting line start point in order to process a horizontal cutting line with a good cutting depth. Thereafter, the cutter 20 travels on the surface of the strip-shaped glass plate G along the guide frame 26 by the driving force of the servo motor 22 as shown by the solid line in FIG. Thereby, a transverse line is processed on the surface of the band-shaped glass plate G. After that, the cutter 20 is moved upward from the strip glass plate G by the actuator after passing a predetermined amount of the end of the cutting line, and then returned to the original cutting line standby position (position indicated by the solid line in FIG. 1) by the servo motor 22. Is done.

  On the other hand, the advancing / retreating means of the cutter 18 includes a servo motor 28 as shown in FIG. 3, and the servo motor 28 and the cutter 18 are attached to a guide frame 30 in FIG. It is attached at intervals. The guide frame 30 is installed across the roller conveyor 12 and in a direction orthogonal to the conveyance direction of the belt-shaped glass plate G. The ball screw device as the feeding means is provided in a hollow guide frame 30, and the cutter 18 advances and retreats in a horizontal slit 32 formed in the guide frame 30 by driving the ball screw device. It is slid through the moving means. Thereby, the position of the cutter 18 in the direction orthogonal to the conveyance direction of the band-shaped glass plate G is adjusted.

  The servo motor 28 shown in FIG. 3 moves the cutter 18 downward to generate a vertical cutting line on the belt-shaped glass plate G, and generates a pressing force on the belt-shaped glass plate G. The torque of the servo motor 28 is controlled by the control device 24 via the servo amplifier 34.

  Further, the control device 24 controls the advance / retreat movement timing of the cutter 18 by the servo motor 28 based on the transport amount of the band-shaped glass plate G obtained by the transport amount detection device 100 and also cuts the cutter 20 by the servo motor 22. The start time and the traveling speed of the cutter 20 are controlled.

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

  FIG. 4 is a block diagram showing a configuration of the carry amount detection apparatus 100.

The transport amount detection device 100 includes a roller 102 that rotates in contact with the belt-like glass plate G being transported. Also includes two cutting sides 105A opposite the cut glass sheet _{G A} by the folding device 52, an electronic camera (measuring means) 104A for individually imaging the 105B, and 104B. Furthermore, an encoder (signal generating means) 106 that generates a pulse signal according to the rotation amount of the roller 102 is provided. Furthermore, a pulse counter 112 that counts pulse signals generated from the encoder 106 is provided. The control device (calculation means) 24 calculates the transport amount of the glass strip G based on the number of pulses counted by the pulse counter 112.

The storage unit (not shown) of the control device 24 stores a reference length (reference value) that is the length between the two cut sides 105A and 105B. The reference value is a single length of along the conveying direction of the glass plate G _A set value to be cut from the belt-like glass plate G (Y).

  On the other hand, the electronic camera 104A is installed on the downstream side in the transport direction of the strip-shaped glass plate G, and the electronic camera 104B is installed on the upstream side in the transport direction of the strip-shaped glass plate G. In addition, the electronic cameras 104A and 104B control the two cutting side portions 105A and 105B at the same time when the two opposing cutting side portions 105A and 105B pass below the electronic cameras 104A and 104B. 24. An image signal including the two cut side portions 105A and 105B captured by the electronic cameras 104A and 104B is binarized by the image processing unit 114, and only the images of the two cut side portions 105A and 105B from the entire image. Is extracted.

  At this time, the electronic cameras 104A and 104B are installed so that the interval between the electronic cameras 104A and 104B is equal to the set value (Y) described above.

This will be specifically described with reference to FIG. In FIG. 5, the image of the cut edge 105A captured by the electronic camera 104A is displayed in the image area 116A of the electronic camera 104A. Further, the image of the cut edge 105B captured by the electronic camera 104B is displayed in the image area 116B of the electronic camera 104B. The electronic cameras 104A and 104B are set such that the distance (L ₂ ) between the center lines 117A and 117B of the image areas 116A and 116B is equal to the set value (Y).

The image signals of the two cut edge portions 105A and 105B that have been binarized by the image processing unit 114 in FIG. 4 are output to the control device 24. The control device 24 stores dimensions corresponding to one pixel of the electronic cameras 104A and 104B. The control device 24 counts the pixels from the center line 117A of the image area 116A shown in FIG. 5 to the image of the cut edge 105A, and calculates the pixels from the center line 117B of the image area 116B to the image of the cut edge 105B. By counting, the interval between the two opposing cutting edges 105A and 105B is calculated. Thus, measuring the length along the conveying direction A of the cut glass sheet G _A. This length is an actual measurement value (L ₃ ).

The method of calculating the actual measurement value (L ₃ ) based on the number of pixels is an example, and as another method, it is also possible to calculate using the glass plate shape measuring device disclosed in WO2010 / 0955551. The shape measuring apparatus includes four electronic cameras arranged corresponding to the four corners of the glass plate, and storage means for storing relative coordinates of the four electronic cameras. Further, the shape measuring device measures the outer shape of the glass plate conveyed so as to pass through the shape measuring section.

  The measuring method by the shape measuring device includes the steps of determining whether the glass plate has reached the measurement section, and when it is determined that the glass plate has reached the measurement section, the four electrons Steps of capturing images including corner portions of the four corners of the glass plate that have reached the measurement section by the camera, and corners that are coordinate values from the image origins of the four corners of the glass plate based on the captured images A step of calculating post coordinates, a step of calculating the length dimension of each of the four sides of the glass plate based on the calculated corner post coordinates of the glass plate and the relative coordinates stored in the storage means; Based on the calculated corner post coordinates, the relative coordinates stored in the storage means, and the calculated length dimension. Te, and a, a step of computing the respective squareness four corners of the glass plate.

Then, the control device 24 compares the actual measurement value (L ₃ ) with the set value (Y) described above to obtain a change amount of the actual measurement value (L ₃ ) with respect to the set value (Y), and to calculate the change amount. A corresponding correction value is calculated, and the transport amount of the glass strip G is corrected based on the correction value.

  Thereby, according to the conveyance amount detection apparatus 100, even when the shape of the roller 102 changes, the conveyance amount of the strip | belt-shaped glass plate G can be detected correctly.

  Next, a specific example of a method for detecting the amount of conveyance of the band-shaped glass plate G by the conveyance amount detection device 100 and a method for processing a cutting line will be described. In addition, although this example illustrates the cutter 20 which processes a horizontal cutting line, it is the same also about the cutter 18 which processes a vertical cutting line.

(1) Requirements Transport amount of the strip-shaped glass plate G (cut line processing interval): Y (mm)
Diameter of roller 102: D (mm)
Resolution of encoder 106: A (pulse)
1 pulse travel distance: p (mm / pulse) p = πD / A
Correction coefficient: C
Standard correction coefficient: C ₁
Normal correction coefficient: C ₂
Cut line machining command interval: P (pulse) P = Y / p × C ₂ / C ₁
(2) First, a method for obtaining the correction coefficient C will be described.

  When the outer peripheral length πD of the roller 102 is divided by the pulse A per rotation which is the resolution of the encoder 106, the traveling distance p of the strip glass plate G per pulse can be calculated.

  When the transport amount of the strip glass plate G is divided by the travel distance of the strip glass plate G per pulse, a cutting line processing command for processing a horizontal cut line on the strip glass plate G being transported is issued from the control device 24 to the servo motor 22. Therefore, it is possible to calculate the number of pulses necessary for this purpose (cut line processing command interval: P).

  That is, the pulse number P can be calculated by the equation P = Y / p.

  However, in actuality, the measured value of the diameter D of the roller 102 in operation and the design value of the diameter D ′ of the roller 102 do not completely coincide with each other. Therefore, it is necessary to multiply the correction coefficient C and issue a cutting line processing start command. It is necessary to correct the correct number of pulses P in advance.

The number of pulses P in this case is calculated as follows when the reference correction coefficient is C ₁ and the normal correction coefficient is C ₂ .

P = Y / p × C = Y / p × (C ₂ / C ₁ )
Here, the reference correction coefficient C ₁ is a constant.

That is, by obtaining the normal correction coefficient C ₂ in advance, a cutting line start command is output from the control device 24 to the servo motor 22 for each pulse calculated by P = Y / p × (C ₂ / C ₁ ). By doing so, the cut line of the exact distance space | interval can be processed into the strip | belt-shaped glass plate G in conveyance. Here, the acquired normal correction coefficient C ₂ is stored in the control device 24. That is, when the diameter of the roller 102 is changed, the normal correction coefficient C ₂ is corrected by the control unit 24 again.

(3) Next, a method for acquiring the new normal correction coefficient C ₂ ′ when the diameter of the roller 102 changes will be described.

The new normal correction coefficient C ₂ ′ is a value between the set value L ₁ (Y: target value) of the transport amount of the belt-shaped glass plate G and the length between the two cut side portions 105A and 105B obtained by the electronic cameras 104A and 104B. from the measured value L ₃ Prefecture, it can be calculated as follows.

New normal correction coefficient C ₂ ′ = normal correction coefficient C ₂ × (conveyance amount setting value L _{1 of the} belt-shaped glass plate G / measured value L ₃ of the length between the two cut side portions 105A and 105B)
FIG. 6 is a plan view of a strip-shaped glass plate G in which the processing start point of the horizontal cut line is shifted and the horizontal cut line is processed. That is, the band-shaped glass plate G is cut along the horizontal cutting lines 40A and 40B indicated by broken lines in FIG. Then, the cutting edge 105A corresponding to the horizontal cutting line 40A is imaged by the electronic camera 104A, and the cutting edge 105B corresponding to the horizontal cutting line 40B is imaged by the electronic camera 104B. ΔL in FIG. 6 is a shift amount of the processing start point.

As shown in FIG. 6, when the relative conveyance amount set value _{L 1} of the belt-shaped glass plate G, 2 pieces of cutting side portions 105A, actual measurements _{L 3} length between 105B differs from the conveyance amount set value _{L 1} is, Recognizing that the diameter of the roller 102 has changed, the normal correction coefficient C ₂ described above is corrected to a new normal correction coefficient C ₂ ′.

in this case,
C ₂ '= C ₂ × (L ₁ / L ₃ )
And
Therefore, P = L ₁ / p × (C ₂ ′ / C ₁ )
It becomes. Therefore, the conveyance amount of the variation of the belt-like glass plate G, in other words, with respect to the conveyance amount set value L ₁ of the belt-shaped glass sheet G, each pulse P which is calculated based on the amount of change in the measured value L ₃ of the interval, tangential By correcting the normal correction coefficient C ₂ to the new normal correction coefficient C ₂ ′ so that a processing start command is output from the control device 24 to the servo motor 22, a horizontal cut line with an accurate distance interval is processed on the glass strip G. can do.

Therefore, the transport amount detection device 100 accurately detects the transport amount of the belt-shaped glass plate G even when the roller 102 that is in contact with the belt-shaped glass plate G via the sheet 110 thermally expands and contracts and the angular velocity ω varies. it can be, consequently, the tangent processed glass sheet G _a, thereby improving the dimensional accuracy in the conveyance direction of the belt-like glass sheet G. Moreover, since the cutting process start time of the cutter 18 and the retracting movement time of the cutter 18 are also controlled based on a signal indicating the accurate conveyance amount output from the control device 24, the strip glass plate G has a highly accurate vertical cutting line. Can be processed.

That is, the embodiment, the conveyance amount of the belt-like glass sheet G per pulse generated by the transport amount detecting apparatus 100, i.e., when the pulse rate R [mm / pls] is changed, the normal correction coefficient C ₂ new normal By changing to the correction coefficient C ₂ ′, it is possible to process a transverse line with an accurate distance interval by the cutter 20.

When the interval of the cutting line start command is represented by the required number of pulses J [pls],
J = C ₂ ′ (L ₁ / R).

When the pulse rate R generated by the transport amount detection device 100 changes and the dimension (length) between the two cutting side portions 105A and 105B, which is determined by the interval of the cutting line processing start command, changes, the normal correction coefficient C ₂ Is changed to the new normal correction coefficient C ₂ ′, and the actually measured value L ₃ is adjusted to the set value L ₁ .

That is, the new normal correction coefficient C ₂ ′ required for the set value L ₁ and the actually measured value L ₃ is
C ₂ ′ = C ₂ × (L ₁ / L ₃ ).

Next, the change of the normal correction coefficient C ₂ is applied to perpendicularity, the control method of keeping the perpendicularity of the cut sides constant will be described with reference to the illustration of transection line shown in FIG. In addition, the said perpendicularity is a perpendicularity of the transverse line with respect to the conveyance direction A of the strip | belt-shaped glass plate G. FIG.

Here, the normal correction coefficient C ₂ , the set value L ₁ , the new normal correction coefficient C ₂ ′, and the distance in the X-direction line segment from the processing start point P ₁ of the cutter 20 to the processing end point P ₂ of the cutter 20 is set to l ₁ . . In this case, when the machining start point P ₁ is l ₁ proceeded, when the cutter 20 is in a state to reach the end point of processing P ₂ is given transect line 42 is strip-shaped glass sheet G indicated by the two-dot chain line in FIG. 7 It is processed on the surface. In FIG. 7, θ is an angle of the guide frame 26 inclined toward the downstream side in the transport direction with respect to the direction orthogonal to the transport direction (arrow A direction) of the band-shaped glass plate G in FIG.

As shown in FIG. 7, when the pulse rate R changes and l ₁ becomes l ₃ , that is, when the pulse rate R changes and the cutter 20 reaches the processing end point P ₂ , the start point P ₁ becomes l _3. When progressed, a broken line 44 which can be in the machining end point P ₂ and the machining starting point P ₃ of the cutter 20, the angle θ3 which forms by the conveying direction a of the belt-like glass sheet G is given transect line 42 and belt-like glass sheet G This is deviated from the angle θ1 formed with the transport direction A. That is, the perpendicularity of the cutting edge (transverse line) with respect to the transport direction A deviates from the allowable value. The allowable value is a value according to a product standard of a glass plate that is cut along a cutting line and commercialized.

Since the relationship between l ₁ and l ₃ is the same as the relationship between the set value L ₁ and the actually measured value L ₃ ,
C ₂ ′ = C ₂ (l ₁ / l ₃ ) holds.

Next, the number of pulses generated while the cutter 20 goes from the processing start start point to the processing end point is K, and the reference speed of the cutter 20 in the X direction (conveyance direction) is V _X1 [mm / pls]. When the speed in the X direction of the cutter 20 (after change) is V _X3 [mm / pls],
K = l ₁ / V _X1 = l ₃ / V _X3
l ₁ / l ₃ = V _X1 / V _X3
C ₂ ′ = C ₂ (l ₁ / l ₃ ) = C ₂ (V _X1 / V _X3 )
Therefore, V _X3 = V _X1 (C ₂ / C ₂ ′).

And the angle of the traveling axis of the cutter 20 theta with respect to the transport direction of the belt-like glass sheet G, the speed of the X component of _V 1 _{(V X1} speed skew running of reference of the cutter 20 is _{V 1, V Y1} is the _{V 1} Y component speed)
V ₁ = V _X1 / sin θ
Also, since the relationship between V _X1 and V _X3 is the same as the relationship between V ₁ and V ₃ ,
V ₃ = V ₁ (C ₂ / C ₂ ′).

Incidentally, _{V 3} is the velocity of the skew running of normal cutters _{20, V Y3} is the velocity of the Y component of _{V 3.}

That is, the control device 24 controls the servo motor 22 to move the cutter 20 at a normal cutter speed V _{3 obtained} by multiplying the reference traveling speed V ₁ of the cutter 20 by (C ₂ / C ₂ ′). 20 travel speed is changed. As a result, the squareness of the cutting side (cut line) with respect to the transport direction A can be kept within an allowable value, and the squareness can be kept constant.

  On the other hand, the roller 102 includes a metal roller main body 108 and a rubber or resin sheet 110 lining the outer peripheral surface of the roller main body 108. The sheet 110 serves as a cushioning material so that the surface of the belt-like glass plate G is not damaged by the roller 102 coming into contact therewith. Further, since the sheet 110 is in close contact with the surface of the band-shaped glass plate G, the roller 102 is prevented from slipping with respect to the band-shaped glass plate G, so that the detection accuracy of the transport amount of the band-shaped glass plate G is enhanced.

  FIG. 8 is a perspective view of a cutting line processing apparatus 10A showing another embodiment of the present invention, FIG. 9 is a plan view of the cutting line processing apparatus 10A, and the cutting line processing apparatus 10 shown in FIGS. The same or similar members are denoted by the same reference numerals, and the description thereof is omitted.

The cutting line processing apparatus 10 shown in FIGS. 1 and 2 detects the transport amount of the band-shaped glass plate G by actually measuring the length between the two opposing cutting side portions 105A and 105B, and starts the cutting line processing. It is a device that controls the time and the traveling speed of the cutter 20. On the other hand, the cutting line processing apparatus 10A according to another embodiment shown in FIGS. 8 and 9 acquires two adjacent cutting lines 107A and 107B processed by the cutter 20 with the electronic cameras 104A and 104B, and the cutting line 107A. It detects a conveyance amount of the belt-like glass sheet G as compared distance L _a and the set value of 107B and (Y), tangential machining start time, and a device for controlling the traveling speed of the cutter 20. Even in this case, the same effect can be obtained.

That is, the electronic camera 104A images the cut line 107A of the strip-shaped glass plate G, and the electronic camera 104B captures the cut line 107B of the strip-shaped glass plate G. The calculation method of the interval between the cut lines 107A and 107B (interval L _A along the conveyance direction A of the belt-like glass plate G) is the same as the method for calculating the length between the cut side portions 105A and 105B. Further, the detection of the conveyance amount of the band-shaped glass sheet G, the start timing of the cutting process, and the speed of the cutter 20 based on the interval between the cutting lines 107A and 107B are the same as those by the control device 24 shown in FIG.

Thus, Figure 8, according to the cut line processing apparatus 10A shown in FIG. 9, the electronic camera 104A, the information indicating the distance L _A along the conveying direction of the belt-like glass sheet G acquired by 104B is output to the control unit 24 , the control unit 24, the setting values and the interval L _a (Y: reference length) and by comparing the obtained amount of change in distance L _a. And the control apparatus 24 calculates the correction value corresponding to the variation | change_quantity, and changes the cutting line starting time by the cutters 18 and 20 and the traveling speed of the cutter 20 based on this correction value. Thereby, according to this invention, even if the diameter of the roller 102 changes and the conveyance amount of the strip | belt-shaped glass plate G changes, the strip | belt-shaped glass plate G can be cut with a dimensional accuracy.

  In the embodiment, the electronic cameras 104A and 104B are illustrated as measurement means. The electronic cameras 104A and 104B include an image sensor such as a CCD or CMOS that images the belt-shaped glass plate G. The image signal output from the image sensor is processed by the image processing unit 114. The image processing unit 114 is configured by a microcomputer including a CPU, a RAM, a ROM, and the like, for example. In addition, the image processing unit 114 performs image processing on the image captured by the image sensor, and identifies the location where the brightness of the image changes abruptly, so that the shape of the glass plate (the cut side portions 105A and 105B and the cut line 107A is obtained). 107B), and the size is detected.

  Moreover, the following means are also illustrated as a measurement means. For example, a laser displacement meter can be used. The laser displacement meter can detect the edge of the cut glass plate and detect the shape of the glass plate as long as it is a sensor of a type that transmits the sheet-like laser light and detects the light amount of the light receiving part.

  When the measurement means is a sensor, it is difficult to detect the shape of a cut or cut glass plate, so it is difficult to detect the shape of a glass plate. It is preferable to detect the shape of the glass plate from its four corners. This is because in the case of the sensor, it is not captured by an area but by a point or a line. In other words, since the corner of the glass plate itself cannot be detected with the sheet-like laser light, two points on one side of the glass plate are detected using two sensors for one side of the glass plate. A straight line passing through two points is obtained, and a corner of the glass plate is obtained from a virtual intersection of two adjacent straight lines. Therefore, two sensors are required for one side of the glass plate, for a total of eight sensors.

G ... strip glass plate, G _A ... glass plate, 10, 10A ... cutting line processing device, 12 ... roller conveyor, 14 ... vertical cutting line processing machine, 16 ... horizontal cutting line processing machine, 18, 20 ... cutter, 22 ... servo motor, 24 ... Control device, 26 ... Guide frame, 28 ... Servo motor, 30 ... Guide frame, 32 ... Slit, 34 ... Servo amplifier, 40A, 40B ... Transverse line, 52 ... Folding device, 100 ... Carrying amount detection device, 102 ... Roller, 104A, 104B ... Electronic camera, 105A, 105B ... Cutting edge, 106 ... Encoder, 107A, 107B ... Cut line, 108 ... Roller body, 110 ... Sheet, 112 ... Pulse counter, 114 ... Image processing unit, 116A, 116B ... Image area, 117A, 117B ... Center line

Claims (6)

A roller that rotates in contact with the conveyed plate-like object, a signal generating unit that generates a signal corresponding to the rotation amount of the roller, and a calculation unit that calculates the conveyance amount of the plate-like object based on the signal A conveyance amount detection means for the plate-like object
Cutting line processing means;
Driving means for processing the cutting line on the surface of the plate-like object by running the cutting line processing means on the surface of the plate-like object in a direction inclined by a predetermined angle with respect to the conveying direction of the plate-like object;
Cutting means for cutting the plate-like object along the cutting line;
A measuring means for measuring a distance between two adjacent cutting lines of the plate-like object subjected to the cut line processing or a length in a conveying direction of the cut plate-like object;
The reference value of the interval or the length is stored, the reference value is compared with the interval or the length measured by the measuring unit, and the interval measured by the measuring unit with respect to the reference value or the A control unit that obtains a change amount of the length and controls the driving unit based on the change amount to change a traveling speed of the slicing unit;
A cutting apparatus for cutting a plate-like object characterized by comprising:   2. The control unit according to claim 1, wherein the control unit controls the driving unit to change a traveling speed of the cutting line processing unit so that a perpendicularity of the cutting line with respect to a conveyance direction of the plate-like object falls within an allowable value. Cutting device for sheet-like material. The roller of the transport amount detecting means is brought into contact with the transported plate-like object, the roller is rotated, a signal corresponding to the rotation amount of the roller is generated from the signal generating means, and the plate-like object is generated based on the signal. A plate-like object conveyance amount detection step of calculating the conveyance amount of
A cutting line that cuts a cutting line on the surface of the plate-like object by causing the driving means to travel on the surface of the plate-like object in a direction inclined by a predetermined angle with respect to the conveying direction of the plate-like object. Processing steps,
A cutting step of cutting the plate-like object along the cut line by a cutting means;
A measuring step of measuring, by a measuring means, an interval between two cutting lines adjacent to each other of the cut plate-like object or a length in a conveying direction of the cut plate-like object;
The reference value of the interval or the length is stored in the control means, and the control means compares the reference value with the interval or the length measured by the measuring means, and the measuring means for the reference value A control step of obtaining the measured change amount of the interval or the length, and controlling the driving means based on the change amount to change the traveling speed of the cutting line processing means,
A cutting method for a plate-like object comprising:   In the control step, the control means controls the driving means so as to change a traveling speed of the slicing means so that a perpendicularity of the slicing line with respect to a conveying direction of the plate-like object falls within an allowable value. 4. A method for cutting a plate-like material according to 3.   An apparatus for producing a glass plate, comprising the plate-like material cutting device according to claim 1 or 2.   A method for producing a glass plate, comprising the method for cutting a plate-like material according to claim 3 or 4.

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