TWI424901B - The edge of the glass plate grinding device - Google Patents

Description

Glass plate end face grinding device

The present invention relates to an end surface polishing apparatus for a glass sheet, and particularly relates to an end surface polishing apparatus for a glass sheet which is subjected to polishing of an end surface of a thin glass for a liquid crystal display or a glass substrate for a plasma display.

The end face grinding of the glass plate is to remove the fine burrs generated on the end faces and the fine glass frit adhered to the end faces in the bending step of the glass plate manufacturing step, and to reverse the surface of the glass plate by R chamfering or C-cutting Angle, and the end face of the glass plate is ground from the previous one.

An end surface polishing apparatus for a glass sheet disclosed in Japanese Laid-Open Patent Publication No. 2004-237380 (Patent Document 1) includes: two sheets of holding sheets for holding a glass sheet as an adsorption holder; and a moving mechanism for making two sheets While keeping the plates offset from each other and making them reciprocate, in terms of the respective forward strokes of the two holding plates, the two holding plates are moved on a common moving path extending in the reciprocating direction, and are held in two pieces. In terms of the respective return strokes of the plates, the two holding plates are moved on one of the other moving paths different from the one moving path; the grinding wheels are the two holding plates that are reciprocated by the moving mechanism. On the respective moving strokes, the end faces of the glass plates of the two holding plates are polished; and a pair of holding conveyor devices are used to grind the end faces of the glass plates by grinding the grinding wheels, and the contrast is The end face of the polished glass plate is held on the inner side.

The end face grinding device of the glass plate of Patent Document 1 combines the positioning accuracy The high-adsorption transfer type holding plate and the holding belt device which support the end of the glass plate and reduce the deflection of the end portion of the glass plate; and the moving stroke and the return stroke of the holding plate are A device that solves the problem by increasing the height of the load and the increase in the load on the equipment when the productivity of the adsorption transport type is increased. However, the retaining plate of Patent Document 1 has a problem that since the reciprocating paths share a plurality of retaining plates sharing the reciprocating path, the retaining plate is configured to be cantilevered by the upper and lower moving devices, and is deflected by the quality of the glass plate. , making the grinding process unstable.

Further, the end face of the glass plate has a curved shape in which the end face shape is not linear due to the variation in the processing precision in the bending step, or a portion having irregularities due to the portion, and the shape thereof is various. When the end face of such a non-uniform shape is processed by the end surface polishing apparatus of Patent Document 1, since the glass plate is positioned by the holding plate during the polishing process, there is a possibility that the variation of the end face accuracy cannot be followed. The disadvantage of end face grinding.

For the above reasons, the polishing apparatus of Patent Document 1 has a problem in that the end surface grinding processing cannot be performed with a certain machining margin, and the polishing load is increased in the convex portion where the machining margin suddenly increases. This part is broken or notched or causes damage to the grinding wheel. In particular, in the case of a thin glass such as a glass substrate for a liquid crystal display or a glass substrate for a plasma display, the thickness is 0.3 to 2.8 mm, and the end surface is sharp like a razor. Sharp, and thus often cause the above problems.

In view of the above circumstances, it is an object of the present invention to provide an end surface polishing apparatus for a glass sheet which is capable of processing a face of a glass sheet while raising the processing rhythm in terms of an adsorption transfer type having a good processing precision. The margin is polished without causing damage to the end faces of the glass sheets and the polishing mechanism.

In order to achieve the above object, the present invention provides an end surface polishing apparatus for a glass sheet, which is characterized in that: a glass having a substantially rectangular shape is conveyed while polishing an end surface of the glass, and at least one pair of belt conveying mechanisms are held in the glass sheet. The glass plate is conveyed in a specific direction along the end portion to be polished than the end surface to be polished; the adsorption transfer mechanism sucks and holds the glass plate and transports the glass plate in the specific direction. a polishing mechanism that presses the end surface of the glass plate conveyed by the belt conveyance mechanism and the adsorption transport mechanism to the end surface to be polished, and the sensor is attached to the polishing The upstream side of the glass sheet conveying direction of the mechanism detects a plurality of polished end face positions for each of the glass sheets sucked and held by the adsorption transport mechanism; and the position control unit is based on the sensor detected by the sensor A plurality of the aforementioned end face positions, and the feedforward controls the position of the aforementioned grinding mechanism.

In the present invention, it is preferred that the aforementioned sensor is a non-contact sensor.

In the present invention, it is preferable that the adsorption transport mechanism includes the following: an adsorption unit that adsorbs and holds the glass sheet; and the advance and retreat moving machine The moving portion moves forward and backward relative to the glass sheet; the linear motion guiding member guides the adsorption portion in the specific direction; and the driving mechanism causes the adsorption portion to follow the linear motion type The guiding member moves at the same speed as the conveying speed of the belt conveying mechanism, and moves the suction unit between the conveyance start position and the conveyance end position, and the control unit controls the adsorption unit to start or stop the glass. The adsorption operation of the plate controls the advance/retract movement mechanism to move the adsorption unit forward and backward, and controls the drive mechanism to cause the adsorption unit to perform the forward movement and the reverse movement.

In the present invention, it is preferable that the adsorption transport mechanism is provided with a plurality of stages, and each of the adsorption transport units controls the forward movement and the backward movement of each adsorption unit by the control unit so that there is a time difference between the respective operations.

In the case where a plurality of adsorption transport mechanisms are provided, it is preferable that the forward movement and the reversing operation of each adsorption unit of each adsorption transport mechanism are controlled by the control unit so as to coincide with the conveyance timing of the glass sheet so that each operation has Time difference. Thereby, even if the glass plate is continuously carried into the polishing apparatus, the glass plate can be smoothly conveyed by the adsorption unit, and the production efficiency can be improved.

According to the end surface grinding device for a glass plate according to the present invention, the processing rhythm can be improved with high precision, and the end surface of the glass plate can be polished with a certain processing margin, so that the end surface of the glass plate and the grinding mechanism are not damaged. , and the grinding process can be stably performed.

Hereinafter, the end of the glass plate related to the present invention will be described in detail based on the drawings. A preferred embodiment of a face grinding device.

1 is a plan view showing an end surface grinding device 10 of a glass sheet of an embodiment; and FIG. 2 is a longitudinal sectional view showing the end surface grinding device 10 taken along line II-II of FIG.

As shown in the figures, the end surface polishing apparatus 10 is configured by the pair of belt conveyors 12, the adsorption transport mechanism 14, the polishing mechanism 16, the sensor 18, and the position control unit 20. Further, since these constituent members are disposed at right and left symmetrical positions with the center line CL shown in FIG. 2 interposed therebetween, the constituent members disposed on the left side of FIG. 2 will be described here, and the constituent members disposed on the right side of FIG. 2 will be described. The same symbol is given, but the description thereof is omitted. In the drawings, the symbol X indicates the horizontal conveyance direction of the glass sheet G, the symbol Y indicates the horizontal direction orthogonal to the X direction, and the symbol Z indicates the orthogonal direction in the X and Y directions. .

The belt conveyance mechanism 12 holds the portion closer to the inner side than the surface to be polished of the end surface polishing target glass sheet G, and conveys the glass sheet G toward the polishing mechanism 16 in the X direction. The belt transport mechanism 12 includes a pair of endless belts 22 and 24 which are disposed one above the other with the glass plate G interposed therebetween. These endless belts 22 and 24 are laid on a pulley (not shown) and arranged in the X direction. Further, the endless belts 22 and 24 are circumferentially moved in the X direction by the driving force of a motor (not shown). In this way, the glass sheet G held between the endless belt 22 and the endless belt 24 is conveyed from the upstream side of the end surface polishing apparatus 10 toward the polishing mechanism 16 at a specific speed. Further, reference numeral 26 is a guide member for guiding the circumferential movement of the endless belt 22; and reference numeral 28 is a guide member for guiding the circumferential movement of the endless belt 24.

The adsorption transport mechanism 14 holds the glass sheet G under the suction and holds the glass sheet G from the upstream side of the end surface polishing apparatus 10 toward the polishing mechanism 16 in cooperation with the belt transport mechanism 12. 3 is a perspective view of the adsorption transport mechanism 14; and FIG. 4 is a longitudinal sectional view of the adsorption transport mechanism 14.

As shown in the figures, the adsorption transport mechanism 14 includes a plurality of adsorption pads (adsorption portions) 30, 30, ... which hold the glass plate G as an adsorption holder; and advance and retreat moving mechanisms 32, 32. The adsorption pads 30, 30, ... move forward and backward (lifting) movement of the glass sheet G in the Z direction; a known linear motion type guiding member 38 which guides the adsorption pads 30, 30 toward the polishing mechanism 16 by the rail 34 And the driving mechanism 40, wherein the adsorption pads 30 and 30 are moved along the linear motion type guiding member 38 at the same speed as the conveying speed of the belt conveying mechanism 12, and the adsorption pad 30, 30 is a person who moves back and forth between the transfer start position and the transfer end position. Further, the adsorption transport mechanism 14 includes a control unit 42 that controls the adsorption pads 30, 30... to start or stop the adsorption operation of the glass sheet G, and to control the advance and retreat moving mechanisms 32, 32 so that the adsorption pads 30, 30... The advance and retreat movement is performed, and the drive mechanism 40 is controlled to cause the adsorption pads 30, 30, ... to perform the forward motion and the reverse motion.

Further, in the present embodiment, the number of the adsorption pads 30 is six, but one or more may be used for stable holding and transportation. When the number of the adsorption pads 30 is set to be larger than the size of the glass sheet G, the glass sheet G can be stably held, which is preferable. Further, in the present embodiment, the adsorption pad 30 is provided below the glass plate G, but may be provided on the upper side.

For the advance/retract movement mechanism 32, for example, a pneumatic cylinder can be used, and the rod 33 of the pneumatic cylinder is fixed to the central portion of the lower portion of the adsorption pad 30. Adsorption pad 30 Advancing (raising) toward the lower surface of the glass sheet G by the extending action of the link 33, as shown in FIG. 4, while abutting against the lower surface of the glass sheet G, from the glass sheet G by the contraction action of the link 33 Let's make a back move below. This amount of retreat movement is set to be greater than or equal to the amount of deflection of the glass sheet G by the self-weight of the glass sheet G (tens of mm). Further, the advancing and retracting movement mechanism 32 is not limited to the pneumatic cylinder, and the ball screw may be used as long as it can be repeatedly extended and expanded. However, from the viewpoint of cost and structural simplicity, it is preferable to use a pneumatic cylinder.

Further, the adsorption pads 30, 30, ... are connected to an adsorption air tube (not shown) that protrudes from the cable holder 44 via a three-way valve (not shown). Further, the pad is connected to a vacuum device (not shown) by an air tube system. When the first valve of the three-way valve is opened, the suction force of the vacuum device is transmitted to the adsorption pads 30, 30, ... via the adsorption air tube. In this way, in the advanced position of Figs. 3 and 4, the lower surface of the glass sheet G is adsorbed and held by the adsorption pads 30, 30, .... Further, when the first valve of the three-way valve is closed and the second valve is opened, the adsorption pads 30, 30 are opened to the atmosphere, and the adsorption force of the glass plate G by the adsorption pads 30, 30... The system was released. Further, the three-way valve solenoid valve is controlled by the control unit 42, and the solenoid valve is opened and closed by an operation/stop signal from a signal line disposed on the flexible cable 46.

As shown in Fig. 4, the advancing and retracting moving mechanisms 32, 32, ... are disposed on the upper surface of the hollow traveling body 48 formed in a cross-sectional shape II. The forward/reverse moving mechanisms 32, 32 are connected to a cylinder air tube (not shown) extending from the cable holder 44, and the cylinder air tube is connected to the air via a three-way valve (not shown). Supply device. Therefore, when opening the first valve of the aforementioned three-way valve When the second valve is closed, the air is supplied from the air supply device to the air chamber on the extension side of the link of the advancing and retracting movement mechanisms 32, 32... through the air tube for the cylinder to advance and retreat the movement mechanism 32, 32. The connecting rods 33, 33, ... are each elongated. Further, when the first valve of the three-way valve is closed and the second valve is opened, the air is supplied to the connecting rods of the advancing and retracting moving mechanisms 32, 32 via the air cylinder for the air supply device. The air chamber on the contraction side contracts the respective links 33, 33, ... of the advancing and retracting moving mechanisms 32, 32, .... Further, the three-way valve solenoid valve is controlled by the control unit 42, and the solenoid valve is opened and closed by an operation/stop signal from a signal line disposed on the flexible cable 46.

The traveling body 48 is configured such that a guide block 36 of the linear motion type guiding member 38 is fixed to the lower surface thereof, and in this manner, the rail 34 is freely slidably moved in the X direction of FIG. Further, in the hollow portion of the traveling body 48, a covering member 50 having a cross-sectional shape II as shown in Fig. 4 is disposed. The cover member 50 is disposed along the X direction as shown in FIG. 3, and both ends are fixed to a fixing member (not shown). Furthermore, the cover member 50 is formed to cover the size and length of the fixed frame 52 located below the cover member 50, and the fixed frame 52 is for accommodating the cable holder 44. In this way, the polishing water or the cooling water used in the polishing mechanism 16 is prevented from penetrating into the fixing frame 52 by the covering member 50.

The drive mechanism 40 includes: a timing belt 54; a pair of pulleys 56, 58 that lay the timing belt 54; and a motor 60 that imparts a rotational force to the pulley 56 to cause the timing belt 54 to rotate forward as indicated by the arrow A. The reverse direction B indicated by the direction A and the arrow B is moved around the circumference. The timing belt 54 is disposed on the covering member as shown in FIG. A portion of the hollow portion of the traveling body 48 is fixed to the traveling body 48 at the lower side of the 50. Therefore, when the timing belt 54 is moved circumferentially in the direction of the arrow A by the motor 60, the traveling body 48 travels from the conveyance start position of the end surface polishing apparatus 10 toward the conveyance end position; again, when the timing belt 54 is used When the motor 60 moves around the arrow B direction, the traveling body 48 travels from the conveyance end position to the conveyance start position. This motor 60 also controls its direction of rotation by the control unit 42. Further, the drive mechanism 40 is not limited to the embodiment, and may be a mechanism that allows the traveling body 48 to travel in a specific direction.

On the other hand, as shown in FIG. 1, the polishing mechanism 16 includes one pair of polishing grinding wheels 62 and 62 provided in the X direction. These grinding wheels 62 and 62 are used to polish the end faces of the glass sheets G, and are mounted on the moving stages 64 and 64, respectively (the other mobile stations 64 are not shown). In the case of the mobile station 64, the lower portion is supported by the base 66 of the end surface polishing apparatus 10 in such a manner as to be freely slidably moved in the Y direction, and the motor 70 of the feed screw unit 68 provided at the lower portion thereof is driven. The entire mobile station 64 is slidably moved in the Y direction. In this way, the interval between the opposed grinding wheels 62, 62 with the CL interposed therebetween is adjusted. That is, the sliding movement of the moving table 64 is performed when the operation of changing the size of the glass sheet G is changed.

Further, the mobile station 64 includes a following portion 74 that mounts the grinding wheel 62 and the grinding wheel motor 72, and a moving portion 76 that is coupled to the base 66 via the feed screw device 68. The moving portion 76 is attached thereto. The tracking unit 74 is placed in such a manner that the Y direction is freely slidably moved. Further, the moving portion 76 is provided with a ball screw device 78 for precisely sliding the tracking portion 74 in the Y direction, and the motor 80 of the ball screw device 78 is driven to move the tracking portion 74 to the Y direction. Make precise movements. The motor 80 is driven and controlled by the position control unit 20 as shown in FIG. 1, and the position control unit 20 controls the motor 80 based on the edge position of the end surface of the glass sheet G output from the sensor 18.

The sensor 18 is disposed on the upstream side of the polishing mechanism 16, and detects the position of the plurality of end faces for each of the glass sheets G sucked and held by the adsorption transport mechanism 14; and outputs the end surface position to the position control unit 20. Further, the position control unit 20 performs control of the motor 80 of the ball screw device 78 based on the plurality of end face positions detected by the sensor 18, and performs feedforward control of the position of the grinding mechanism 16 in the Y direction.

When the first sheet glass G before the end surface polishing has been loaded into the inlet (upstream side) of the end surface polishing apparatus 10 by the detecting portion of the inlet substrate (not shown), the inlet is positioned after the lapse of the specific time. The member (not shown) is moved toward the glass sheet G conveyed by the belt conveyance mechanism 12. In this way, the glass sheet G is positioned by the belt transport mechanism 12 and the adsorption transport mechanism 14. Then, in the positioning of the glass sheet G by the inlet positioning member, the adsorption pad A (the adsorption pad 30 of the adsorption transport mechanism 14 on the left side in FIG. 2) is moved from the transfer start position to the downstream side by the adsorption transfer mechanism 14. The movement (synchronized with the belt conveying mechanism 12), after the lapse of the specific time, the adsorption pad A is moved toward the glass sheet G by the advancing and retracting movement mechanism 32, and after the lapse of the specific time, the movement is performed. It is held by the adsorption of the glass plate G of the adsorption pad A. Thereafter, the glass sheet G is transported to the polishing mechanism 16 by the belt transport mechanism 12 and the adsorption transport mechanism 14 .

Then, after adsorption, when a certain time passes, through the glass plate G pass The position of the end face of the glass sheet G is detected by the sensor 18 in the vicinity of the sensor 18, and the end face position is output to the position control portion 20. Further, the position control unit 20 performs feedforward control of the motor 80 of the ball screw device 78 based on the plurality of end face positions output from the sensor 18, and the position of the grinding wheel 62 follows the shape of the end face of the glass plate G. The swaying portion 74 is moved in the Y direction. In this way, the end faces of the glass sheets G are polished with good precision. Further, in the polishing process of the glass sheet G, the glass sheet G is conveyed by both the belt conveyance mechanism 12 and the adsorption conveyance mechanism 14.

In the polishing process of the first glass sheet G and after the processing, when the second sheet glass G before the end surface polishing has been detected by the detecting portion has been carried into the entrance of the end surface grinding device 10, after the lapse of the specific time The inlet positioning member is moved toward the glass sheet G conveyed by the belt conveyance mechanism 12. In this way, the glass sheet G is positioned by the belt transport mechanism 12 and the adsorption transport mechanism 14. Next, in the positioning of the glass sheet G by the inlet positioning member, the adsorption pad B (the adsorption pad 30 of the adsorption transport mechanism 14 on the right side in Fig. 2) moves from the upstream side to the downstream side (with the belt conveying mechanism 12) After the specific time elapses, the adsorption pad B is moved toward the glass sheet G by the advance and retreat moving mechanism 32, and after the lapse of the specific time, the glass plate by the adsorption pad B is performed. The adsorption of G is maintained. Therefore, the second sheet glass G is conveyed toward the polishing mechanism 16 by the belt conveying mechanism 12 and the adsorption conveying mechanism 14 .

Then, after the adsorption, when a certain time passes, the second piece of glass G passes through the vicinity of the sensor 18, and the second piece is detected by the sensor 18. The end position of the glass sheet G is output to the position control unit 20. Further, the position control unit 20 performs feedforward control of the motor 80 of the ball screw device 78 based on the plurality of edge positions output from the sensor 18, and follows the shape of the end face of the second glass plate G with the position of the grinding wheel 62. In this manner, the swaying portion 74 is moved in the Y direction. In this way, the end faces of the second glass sheet G are polished with good precision. Further, in the polishing process of the second glass sheet G, the second sheet glass G is also conveyed by the belt conveying mechanism 12 and the adsorption conveying mechanism 14.

On the other hand, when the polishing process of the glass sheet G is completed, it is confirmed by the detection unit of the exit substrate that the glass sheet G has been carried out from the polishing mechanism, and the adsorption pad A releases the adsorption of the first sheet glass G. After a certain period of time elapses, the adsorption pad A is retracted from the glass sheet G downward by the advance/retract movement mechanism 32. Thereafter, after a certain period of time has elapsed, the vehicle moves to the transport end position, and after the temporary stop, the adsorption transport mechanism 14 performs high-speed return to return to the original transport start position. Next, it waits until the third piece of glass sheet G is detected, and when the third piece of glass sheet G is detected, the above operation is repeated. Further, in the case of the adsorption pad B, the same operation is repeated. The glass plate which is considered to have finished the end surface polishing process is carried out from the end surface polishing apparatus by the belt unloading mechanism.

As described above, the end surface polishing apparatus 10 of the embodiment is a combination of a belt conveyor mechanism 12 having high productivity and an adsorption transport mechanism 14 having high positioning accuracy, which does not increase the load of the equipment or cause the equipment. The device which increases the size and the disadvantage that the time of the adsorption transport mechanism 14 is slow is compensated by the belt transport mechanism 12 to improve the productivity.

In addition, the sensor 18 provided on the upstream side of the glass plate transport direction of the polishing mechanism 16 detects the end surface of the glass sheet G held by the adsorption transport mechanism 14 on a single glass sheet G, and performs multiple parts detection. Based on the plurality of edge positions, the position of the grinding wheel 62 is feedforward controlled by the position control unit 20.

In this manner, the glass sheet G is positioned by the adsorption transport mechanism 14 during the polishing process, and the grinding wheel 62 of the polishing mechanism 16 can perform the end surface grinding process in accordance with the variation in the end surface precision of the glass sheet G. That is, the relative positional accuracy of the end face of the glass plate G and the grinding wheel 62 is high, and the end face grinding process can be performed with a certain machining margin as compared with the prior device; and, even at the end face of the end face having a large machining margin, etc. In the deformation, since the grinding wheel 62 is chased and moved along the shape, the end surface of the glass sheet G and the grinding wheel 62 are not damaged, and the end surface grinding processing can be stably performed.

Regarding the position detection of the end surface of the glass sheet G of the sensor 18, when only one portion is detected on one glass sheet G, the relative position of the glass sheet G to the grinding wheel 62 can be grasped, but it is impossible to grasp The shape of the end face of the glass plate G and the offset by the conveyance of the glass plate G. According to the present embodiment, since the end surface position of the glass sheet G is detected in a plurality of portions, even if the end surface shape is substantially linear or curved, it can be detected; and even if the conveyance accuracy of the glass sheet G is not good, Since the relative position of the end surface of the glass plate G and the grinding wheel 62 can be grasped, the tracking accuracy of the grinding wheel 62 can be increased, and the above effects can be obtained. The more the detection site, the higher the effect. Furthermore, the plural parts mean, for example, an interval of about 5 to 500 mm. The finer the precision of the end face grinding can be performed by the sampling interval of the sensor 18 Processing is therefore preferably 5 to 10 mm. In this way, the correspondence of the convex portions can be facilitated.

Further, in the position control unit 20, the edge reference position of the end surface of the glass sheet G is memorized in advance, and the difference between the edge reference position and the edge position detected by the sensor 18 is calculated to offset the difference. In the manner, the position of the grinding wheel 62 is subjected to feedforward control. It is also possible to provide a more precise end surface grinding process by means of a mechanism for detecting the entry of the glass sheet in the direction of conveyance. The moving mechanism of the grinding wheel 62 is preferably a ball screw device 78 having a high feed accuracy, but is not limited thereto.

Further, as far as the sensor 18 is concerned, it is preferable to use a non-contact sensor. In this way, damage to the end face of the glass sheet G and damage of the sensor 18 due to the contact of the sensor 18 with the end face of the glass sheet G can be prevented. In particular, in the case of a thin glass such as a glass substrate for a liquid crystal display or a glass substrate for a plasma display, since the thickness is 0.3 to 2.8 mm, the end surface is sharp like a razor, and therefore, the sensor 18 is set to be non- Contact systems become effective institutions.

As for the non-contact type sensor 18, it is preferable to use a sensor that uses an image processing technique (binarization processing) by a camera such as a CCD, a CMOS, or the like, or detects a distance from an end face. Ultrasonic sensor. In the case of a camera, in order to detect the edge position of the end face, it is only necessary to image the edge above or below the glass plate G. However, if the polishing step is to use an environment of water or adhesion of polishing dust, etc., The top is better. Moreover, in the case of an ultrasonic sensor, the ultrasonic wave reflected on the end surface is received as a signal, and is disposed opposite to the end surface. can.

In the embodiment, the adsorption portion of the adsorption transport mechanism 14 is exemplified by the adsorption pad 30 which is less likely to cause enthalpy, but is not limited thereto. In order to improve the conveying accuracy, for example, a vacuum adsorption unit may be provided in a block of metal such as aluminum, stainless steel or iron.

In the present embodiment, the glass plate is moved forward by the belt transport mechanism before the adsorption of the glass plate of the adsorption unit, and the drive mechanism is controlled to move the adsorption unit forward, and the adsorption unit is carried by the belt. The moving speed of the mechanism is the same as the moving speed; in this moving motion, the control unit controls the advancing and retracting moving mechanism to move the adsorption unit to the glass plate, and the adsorption unit is attracted to the glass plate. In other methods, it is also possible to control the advancing and retracting movement mechanism when the glass plate is adsorbed and transported, and the adsorption unit is moved toward the glass plate to adsorb the adsorption portion to the glass plate. After the adsorption is completed, the control unit controls the drive mechanism to move the adsorption unit to move the glass plate at the same speed as the conveyance speed of the belt conveyance mechanism.

Further, between the forward movements, the end faces of the glass sheets are polished by a polishing mechanism. When the glass plate passes through the polishing mechanism of the glass plate, when the glass substrate reaches a specific position, the control unit releases the adsorption of the glass plate by the adsorption unit, and then controls the advance and retreat moving mechanism to move the adsorption unit from the glass plate. And the belt conveying mechanism is controlled to stop the moving movement of the adsorption unit. The glass plate which is considered to have finished the end surface polishing process is carried out from the end surface polishing apparatus by the belt unloading mechanism. Next, the control unit performs a control drive mechanism to cause the adsorption unit to perform a return operation and to perform a return movement to the transfer start position. Thereafter, the control unit makes the adsorption The portion waits at the transfer start position until the next glass plate is carried into the end surface polishing device by the carry-in mechanism, and controls each mechanism to perform the above operation at a specific timing after the next glass plate is loaded into the end surface polishing device. In this way, the adsorption, the transfer, and the return operation of the adsorption unit can be smoothly performed in succession. Since the adsorption portion reciprocates along the same linear motion type guide member, the structure is simplified.

Further, if an advance/retract movement mechanism (for example, a cylinder device) is provided directly under the adsorption portion, and the link of the cylinder device is directly connected to the central portion of the adsorption portion, the adsorption portion can be further prevented during the conveyance of the glass plate. The quality of the glass plate is deflected and is therefore ideal. Further, the adsorption portion may be disposed at either one of the lower side and the upper side of the glass plate. When the upper portion is disposed above, an advance moving and retracting moving mechanism (such as a cylinder device) is disposed directly above the adsorption portion, and the cylinder device is connected. The rod may be directly connected to the central portion of the adsorption portion.

Further, in the embodiment of the end surface polishing apparatus 10, two adsorption transport mechanisms 14 and 14 are included, and each of the adsorption transport mechanisms 14 and 14 is aligned with the transport timing of the glass sheet G, and the control unit 42 is provided. The moving motion and the returning motion of each of the adsorption pads 30 and 30 are controlled so that there is a time difference between the motions. In this way, it is not necessary to carry the glass sheet G intermittently into the end surface polishing apparatus 10, and even if the continuous loading is performed, the glass sheet G can be smoothly conveyed by the adsorption pads 30 and 30, and the production efficiency can be improved. . Further, the number of the adsorption transport mechanisms 14 is not limited to two, and may be three or more. Further, for example, the grinding wheel 62 may be a chamfering grinding wheel that chamfers the corner portion.

10‧‧‧End face grinding device

12‧‧‧Belt transport mechanism

14‧‧‧Adsorption transport mechanism

16‧‧‧ grinding mechanism

18‧‧‧ Sensor

20‧‧‧Location Control Department

22, 24‧‧‧ Endless belt

26, 28‧‧‧ Guided components

30‧‧‧Adsorption pad (adsorption section)

32‧‧‧Advance and retreat mobile agencies

33‧‧‧ Connecting rod

34‧‧‧ Track

36‧‧‧Guiding block

38‧‧‧Linear motion guiding members

40‧‧‧ drive mechanism

42‧‧‧Control Department

44‧‧‧ cable bracket

46‧‧‧Flexible cable

48‧‧‧Travel body

50‧‧‧ Covering components

52‧‧‧Fixed frame

54‧‧‧ Timing belt

56, 58‧‧‧ pulley

60, 70, 80‧‧ ‧ motor

62‧‧‧ grinding wheel

64‧‧‧Mobile Station

66‧‧‧Abutment

68‧‧‧feed screw device

72‧‧‧Wheel motor

74‧‧‧Chasing Department

76‧‧‧Mobile Department

78‧‧‧Rolling screw device

CL‧‧‧ center line

A‧‧‧ arrow (forward direction)

B‧‧‧ arrow (reverse direction)

G‧‧‧glass plate

X‧‧‧ symbol (horizontal transport direction of glass plate G)

Y‧‧‧ symbol (orthogonal to the horizontal direction in the X direction)

Z‧‧‧ symbol (orthogonal to the upper and lower directions in the X and Y directions)

Figure 1 is a plan view showing the end surface grinding device of the glass sheet of the embodiment. Figure.

Figure 2 is a longitudinal sectional view of the end face grinding device taken along line II-II of Figure 1.

Fig. 3 is a perspective view showing the adsorption transport mechanism of the end surface polishing apparatus shown in Fig. 1.

Fig. 4 is a longitudinal sectional view showing the adsorption transport mechanism shown in Fig. 3.

10‧‧‧End face grinding device

12‧‧‧Belt transport mechanism

14‧‧‧Adsorption transport mechanism

16‧‧‧ grinding mechanism

18‧‧‧ Sensor

20‧‧‧Location Control Department

30‧‧‧Adsorption pad (adsorption section)

62‧‧‧ grinding wheel

80‧‧‧ motor

G‧‧‧glass plate

X‧‧‧ symbol (horizontal transport direction of glass plate G)

Y‧‧‧ symbol (orthogonal to the horizontal direction in the X direction)

Claims (4)

An end surface polishing apparatus for a glass plate, characterized in that: a glass plate having a substantially rectangular shape is conveyed in a horizontal direction, and an end surface of the glass plate is polished while at least one pair of belt conveying mechanisms are held in the glass plate The glass plate is conveyed in a specific direction along the end portion to be polished than the end portion to be polished; the adsorption transport mechanism sucks and holds the glass plate to transport the glass plate in the specific direction a polishing mechanism that presses the end surface of the glass plate conveyed by the belt conveyance mechanism and the adsorption transport mechanism to the end surface to be polished, and the moving end includes the polishing mechanism a tracking portion and a moving portion on which the tracking portion is placed; and a tracking drive mechanism for causing the tracking portion to be horizontal with respect to the moving portion in a direction orthogonal to the conveying direction of the glass sheet Moving upward, causing the polishing mechanism to move in a horizontal direction with respect to the end surface of the glass plate being polished; the size of the glass plate is changed a driving mechanism that moves the polishing mechanism to the end surface of the glass plate to be polished with respect to the glass plate by moving the moving portion in a horizontal direction orthogonal to a conveying direction of the glass sheet. Moving in the direction; the sensor is disposed on the upstream side of the glass plate transport direction of the polishing mechanism, and the glass that is adsorbed and held by the adsorption transport mechanism for each piece The plate detects a position in a horizontal direction of the plurality of polished end faces; and a position control unit that is based on a position in a horizontal direction of the plurality of the end faces detected by the sensor, and controls the tracking The drive mechanism feeds forward the position of the aforementioned grinding mechanism. The end face grinding device of the glass plate of claim 1, wherein the aforementioned sensor is a non-contact sensor. The end surface polishing apparatus for a glass sheet according to claim 1 or 2, wherein the adsorption transport mechanism includes: an adsorption unit that adsorbs and holds the glass sheet; and an advance/retract movement mechanism that moves the adsorption unit forward and backward relative to the glass sheet a linear motion type guiding member that guides the adsorption unit in the specific direction; and a driving mechanism that moves the adsorption unit along the linear motion type guiding member at a speed similar to a conveying speed of the belt conveying mechanism At the same time, the adsorption unit reciprocates between the transfer start position and the transfer end position, and the control unit controls the adsorption unit to start or stop the adsorption operation of the glass sheet, and controls the advance/retract movement mechanism to move the adsorption unit. The forward and backward movement is performed, and the drive mechanism is controlled to perform the forward movement and the reverse movement of the adsorption unit. The end surface polishing apparatus for a glass sheet according to claim 3, wherein the adsorption transport mechanism is provided with a plurality of stages, and each of the adsorption transport units controls the moving and returning operations of the respective adsorption units by the control unit, so that the respective operations are performed. There is a time difference between them.