JPH10291149A - Angular part device for glass plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the working accuracy of an angular part, by mounting a grinding means which comprises a grinding wheel which is brought into contact with each angular part of a square glass plate horizontally placed and fixed after the positioning, and which is horizontally rotated. SOLUTION: The positioning of a glass plate is performed by bringing the same into contact with all of the stoppers 4a, 4a mounted on one edge side of a positioning table 3, and the side edge stoppers 4b, 4b. Then, an elevating cylinder 11 is operated to lower a pressure member 12, to press and fix an almost central part of the glass plate from an upper part thereof. The opening parts of grinding wheels 31 respectively having an U-shaped section, and horizontally rotated at a high speed, are brought into contact with four corners of the square glass plate which is horizontally placed and fixed, for almost simultaneously grinding and polishing four angular parts of the glass plate. Further, the grinding wheel 31 is movable in the X, Y axial directions, so that each angular part of the glass plate can be circularly grinded when observed in a plane view.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention provides an apparatus for simultaneously grinding four corners of a glass sheet.

[0002]

2. Description of the Related Art Conventionally, there are many known grinding machines for corners of a rectangular glass plate. For example, Tokiko 7-1458
In Japanese Patent Application Publication No. 5 (1993) -195, a conveyor for holding a rectangular plate glass by sandwiching the upper and lower surfaces thereof is provided in a machine frame. A polishing table is provided, the grindstone is provided on the transport direction side of the glass detection limit switch, and the polishing tables are separated from each other via a timer operated by a glass detection signal of the glass detection limit switch, and a glass separation signal is provided. The polishing table is brought close to each other via a timer operated by, and a stepping motor for driving the polishing table is provided, and a corner cutting device for a sheet glass provided with the timer and the digital control device for the proximity separation speed is provided. It has been disclosed.

[0003]

SUMMARY OF THE INVENTION The aforementioned Japanese Patent Publication No. 7-14
The apparatus described in Japanese Patent No. 585 is for polishing a corner of a square glass plate during the transfer of the glass plate, and detects the timing of the forward and backward movement of the horizontal rotating grindstone by detecting the glass plate and performing a timer. In addition, the processing accuracy may vary due to meandering, slippage during the transfer of the glass plate, or deviation from the synchronization with the transfer speed.

Further, there is a disadvantage that the frequency of replacement due to wear of the horizontal rotary grindstone increases, and the loss time at the time of replacement increases.

[0005]

SUMMARY OF THE INVENTION The present invention provides the above-mentioned problems,
In other words, with the simple equipment configuration, the corners of the glass plate are ground simultaneously, the grinding shape can be adjusted individually, the workability is improved, and the glass plate is placed on the positioning table for the purpose of high-precision grinding. Positioning means for the glass plate provided with a stopper member to be placed and abutted on two adjacent sides; pressing and fixing means for allowing the pressing member positioned above the positioning table and pressing the upper surface of the glass plate to be able to move up and down; Grinding means having a grinding wheel that rotates horizontally, abutting on each corner of the rectangular glass plate placed and fixed on,
A grinding unit moving means provided in the vicinity of each corner of the glass plate so that each of the grinding means can be freely moved in the X-axis and the Y-axis; The two corners are simultaneously ground into an arc shape, and the upper and lower edges are chamfered, and the moving direction of the moving means in the X and Y axes of one of the moving means of the grinding unit is changed by a horizontal angle θ. In addition, the present invention further provides a corner grinding device for a glass sheet having a structure in which at least one or more grindstone portions having a U-shaped or V-shaped cross section are stacked as a grinding wheel of the grinding means.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A glass plate carried on a positioning table is brought into contact with a stopper provided at an end of the positioning table, positioned, and then a glass pressing member which can be moved up and down by a lifting cylinder from above is lowered. Was pressed and fixed from above. An opening of a grinding wheel having a U-shaped or V-shaped cross section and rotating at high speed in a horizontal direction is brought into contact with each of the four corners of the horizontally placed and fixed rectangular glass sheet so that the four sides of the glass sheet are fixed. The two corners are almost simultaneously ground and polished.

[0007] The grinding wheel has a U-shaped or V-shaped cross section, and is simultaneously brought into contact with the upper edge and the lower edge of the four corners of the glass sheet. Has an arc-shaped cross section or a chamfered surface on both sides at the same time.

During the grinding of the corners of the glass plate, cold water is sprayed from a water supply nozzle provided in the upper portion near the grinding portion so as to prevent the temperature of the ground surface which generates heat due to the grinding. Also,
The cross section of the grinding wheel has a structure in which U-shaped or V-shaped portions are stacked in multiple stages, and the grinding wheel that rotates horizontally can be moved up and down in desired pitch units according to a command from the controller. Even if the life of the grinding wheel portion of the U-shaped or V-shaped portion has reached its end, the U-shaped or V-shaped portion having a plurality of steps of the grinding wheel is moved up and down by one pitch to obtain another U-shaped or V-shaped portion. Since it is only necessary to switch to the shape part, the frequency of replacement of each grinding wheel can be reduced, the service life can be prolonged, and the loss time at the time of replacement can be greatly reduced.

A grinding mechanism provided with the above-mentioned grinding wheels is arranged near four corners of the glass plate, and the rotation of the grinding wheels is performed by motors, and each of the four grinding mechanisms moves horizontally in the X-axis and Y-axis directions. Since it is free, even if the glass plate is not rectangular but a deformed square such as a trapezoid, the corner can be ground smoothly.

As described above, since the corners of the glass plate are ground while being fixed in position, the grinding accuracy is good, and a plurality of U-shaped sections having a cross section that abuts the end face of the glass of the grinding wheel are provided. The frequency of replacement of the grinding wheel can be greatly reduced, and the loss time due to the replacement can be reduced, so that productivity and workability are also good.

The cross section of the grinding wheel portion of the grinding wheel is not limited to the U-shape, but may be a V-shape. In this case, the corners of the ground glass plate are chamfered.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an apparatus for grinding a corner of a glass sheet according to the present invention.

As shown in FIGS. 1 and 2, a corner grinding device 1 according to the present invention comprises a positioning means 2 for positioning a glass plate placed on a positioning table 3, and pressing the positioned glass plate from above. Pressing and fixing means 10 for fixing;
Grinding means 30, 30 ′, 30 ″ provided near four corners of the fixed glass plate G and provided with a horizontally rotating grinding wheel 31 that can freely contact the corners;
It comprises a moving means 40, 40 ', 40 "of a grinding section for making each of 0' and 30" movable in the X-axis and the Y-axis, and a water supply means 20 for sprinkling water on the grinding section of the glass sheet G. .

The positioning means 2 for the glass plate G is provided with a stopper 4a at one end of a rectangular positioning table 3 provided on a frame 70 and a side end stopper 4b at a side adjacent to the stopper 4a. Positioning is performed by bringing two adjacent sides of the glass plate G placed on the abutment 3 into contact with both stoppers of the stopper 4a and the side end stopper 4b.

The pressing and fixing means 10 is located above the center of the positioning table 3 and has an elevating plate 14 fixed horizontally at the tip of a rod which expands and contracts below the elevating cylinder 11, and is moved in four directions from the elevating plate. The pressing members 12, 12,... For pressing the surface of the glass plate G are attached to the distal ends of the mounting arms 13, 13,.
, 13,... Can be adjusted so that the mounting positions of the pressing members 12, 12,.

If a cushioning material such as an elastic rubber member is adhered to the lower surface of the pressing member 12 of the pressing and fixing means 10, the surface does not need to be damaged when the glass plate G is pressed and fixed. The grinding means 30, 30 ', 30 "are arranged near the corners in order to simultaneously grind the four corners of the glass sheet G, and the grinding wheels 31, 31 are respectively mounted on the axes of the grinding drive motors 32, 32'. , 31 "were directly connected, and the grinding wheels 31, 31 ', 31" were rotated in the horizontal direction.

Further, the moving means 40, 40 'of the grinding section,
40 "indicates that each of the grinding means 30, 30 ', 30" is in the X-axis direction,
The movable means 40 on the right hand side of the movable means 40 shown in FIG. 2 is movable freely in the Y-axis direction. Then, a horizontal frame 52 orthogonal to the single-axis robot 50 was attached to the connection guide 51. The horizontal frame 52
Linear bushes 47, 47 are provided at both ends of the
Shafts 45, 45, both ends of which are fixed on shafts 0 by shaft holders 43, are fitted into the linear bushes 47, 47, and the horizontal frame 52 is slidable in the X-axis direction. A Y-axis drive motor 42 for moving the grinding wheel in the Y-axis is mounted on the horizontal frame 52.
By the rotation of 2, the guide portion fitted to the ball screw connected to the rotating shaft (not shown) becomes movable in the Y-axis direction. Grinding means 30 and 3 are attached to the guide via mounting members 53 and 53.
0 was attached.

The moving means 40 'on the left front side in FIG. 1 is the same as the moving means 40 on the right side, and is a single-axis robot 50'.
A horizontal frame 52 'orthogonal to the single-axis robot 50' is attached to the connection guide 51 ', and grinding means is provided only on the front side of the horizontal frame 52'. 30 'was attached.

The remaining left-hand side grinding means 30 "in FIG. 2 has the orthogonal movement direction turned by an angle θ, for example, about 22 degrees from the XY axis direction, and the movement distance range is larger than the other parts. This is a glass plate G
Forming a portion called an orientation flat portion 80 ′ in which the grinding portion is made larger than the other three corner portions 80, 80, 80 so that the direction after grinding can always be kept in a fixed direction. If the directions in which the X and Y axes are shifted by the angle θ are the X ′ axis direction and the Y ′ axis direction, the internal mechanism of the single-axis robot 50 ″ provided in the X ′ axis direction is By rotating the ball screw via the speed reduction mechanism, the connection guide fitted to the ball screw becomes movable in the X 'direction. Bush 4
7 "is provided, and a shaft 45" whose both ends are fixed by shaft holders 43 "and 43" is fitted into the linear bush 47 "so that the linear bush 47" is slidable on the shaft 45 ".

A moving means in the Y'-axis direction is mounted on a mounting member mounted on the connection guide movable in the X 'direction.
As a moving means in the Y'-axis direction, a motor (not shown) is rotated to rotate a ball screw (not shown) so that a guide fitted to the ball screw can be moved, and a grinding means 30 ″ for the orientation flat portion is attached to the guide. Grinding means 30 "is provided with a grinding wheel 31 'on the rotating shaft of the grinding motor.
Are directly connected, the corners of the glass sheet G are ground, and the orientation flats 8
0 'is formed.

The water supply means 20 is located above the positioning table 3 and is provided with a tip of a water supply nozzle 21 at an upper portion near a grinding portion of the glass plate G.
To supply water from a water supply source (not shown), spray water from a water supply nozzle 21, suppress heat generated when grinding a corner of the glass plate G, and spray and remove shavings by grinding.

FIG. 3 shows the grinding wheels 31, 31 ', 31 "of the grinding means 30, 30', 30". The grindstone 33 having a U-shaped or V-shaped cross section is formed, for example, in a three-tiered structure, and the U-shaped or V-shaped part can be moved up and down in pitch units by a controller (not shown).

Hereinafter, a method of using the corner grinding device 1 for a glass sheet G according to the present invention and its operation will be described. The glass plate G is carried in and placed on the positioning table 3 by a transfer means (not shown), and the placed glass plate G is provided on one side of the positioning table 3 with stoppers 4a and 4a provided on the side adjacent to the stoppers 4a and 4a. Positioning is performed by contacting all of 4b and 4b.

After positioning, the elevating cylinder 11 is operated from above the positioning table 3 to attach the mounting arm 13 to the tip of the rod of the elevating cylinder 11 via the elevating plate 14.
Then, the pressing member 12 provided was lowered, and the central portion of the glass plate G was pressed and fixed from above. Each of the four corners of the horizontally mounted and fixed rectangular glass plate G has a U
Grinding wheel 31 having a U-shaped cross section and rotating horizontally at high speed
And the four corners of the glass sheet G are ground and polished almost simultaneously.

The grinding wheel 31 has a U-shaped cross section,
The upper and lower edges of the four corners of the glass plate G are simultaneously brought into contact with each other, and the center of the thickness of the glass plate G and the center of the U-shaped portion of the grinding wheel are brought into contact with each other. The cross section of the corner of the glass sheet G after the grinding has an arc shape as shown by reference numeral 81.

The grinding wheels 31, 31...
Since the glass plate G can be freely moved in the Y-axis direction, each corner of the glass plate G can be ground into an arc when viewed in plan. In the grinding of the orientation flat 80 ', the direction of movement of the grinding wheel 31 is set at an angle θ (about 22 degrees in the embodiment) from the X and Y axis directions, so that the orientation flat 80 as shown in FIG. 'Easy grinding.

Furthermore, even if the U-shaped portion 33 of the grinding wheels 31, 31,... Has completed the grinding operation for a predetermined number of pieces and the life due to the wear of the grinding wheel portion has occurred, the horizontal rotation is performed according to a command from a controller (not shown). Grinding wheels 31, 3
By raising and lowering 1, 31, ′, 31 ″ by a set pitch by a lifting motor (not shown), it is possible to instantaneously switch to an unused grinding section having a plurality of stages, and each of the grinding wheels 31, 3 ′
The exchange frequency of 1, 31 ', 31 "is also greatly reduced,
The service life can be extended, and the loss time due to replacement work can be significantly reduced.

Further, grinding means 30, 30 ', 30 "provided with the grinding wheel 31 are arranged in the vicinity of four corners of the glass sheet G. Means 30, 30,
Since each of 30 ′ and 30 ″ is movable in the X-axis and Y-axis directions in the horizontal direction, even if the glass plate G is not rectangular but deformed square such as trapezoid, the corners can be ground smoothly. it can.

Although the preferred example has been described above, the present invention is not limited to this, and various applications can be considered. As the loading and transferring means for loading and transferring the glass plate G, the glass plate G may be placed manually and removed by hand after grinding is completed, or the glass plate G may be sucked by a suction pad using an articulated robot or the like. Alternatively, the glass plate G may be sucked and taken out by the same robot or another robot after the grinding is completed.

As the means for moving the grinding means in the X and Y axes, an example in which the X axis is shared as described in this embodiment when the shape of the glass plate G is rectangular has been described. The two grinding means may be moved independently of each other in the X-axis and Y-axis directions.

Further, when the grinding wheel portion of the grinding wheel 31 has a U-shaped or V-shaped portion in a plurality of stages, the grinding wheel portion may be stacked in a plurality of stages, or a plurality of stages may be integrated. It may be used as a grinding wheel.

Further, the lifting cylinder 11 used in the embodiment of the present invention can be replaced with a motor.

[0033]

According to the present invention, since the corner portion is ground while the glass plate is positioned and fixed, the processing accuracy of the corner portion can be improved, and the grinding portion having a U-shaped or V-shaped cross section can be obtained. Since the wheels are stacked in multiple stages, the frequency of replacement of the grinding wheels has been reduced, the loss time for adjustment and the like due to replacement has been reduced, and productivity and workability have been greatly improved.

[Brief description of the drawings]

FIG. 1 is a side view of a corner grinding device according to the present invention.

FIG. 2 is a plan view of the corner grinding device of the present invention.

FIG. 3 is a side view of the grinding wheel of the present invention.

FIG. 4 is a plan view of a glass plate ground according to the present invention.

FIG. 5 is a cross-sectional view of a glass sheet ground according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Corner grinding device 2 Positioning means 3 Positioning table 4a Stopper 4b Side end stopper 10 Press fixing means 11 Lifting cylinder 12 Pressing member 13 Mounting arm 14 Lifting plate 20 Water supply means 21 Water supply nozzle 22 Water supply pipe 30, 30 ', 30 "grinding Means 31, 31 ', 31 "Grinding wheel 32, 32' Grinding motor 40, 40 ', 40" Moving means 42, 42' Drive motor 45, 45 ', 45 "Shaft 47, 47', 47" Linear bush 50, 50 ', 50 "Single-axis robot 51, 51' Connection guide 52, 52 'Horizontal frame 53, 53' Mounting member 70 Mount G Glass plate

Claims (3)

[Claims] 1. A glass plate is placed on a positioning table,
Positioning means for a glass plate provided with a stopper member for abutting two adjacent sides, pressing and fixing means for positioning the upper part of the positioning table and pressing the upper surface of the glass sheet so as to be able to move up and down, and horizontally placed after positioning Grinding means for each corner provided with a grinding wheel which abuts on each corner of a fixed rectangular glass plate and rotates horizontally, and the respective grinding means provided near each corner of the glass plate are provided with X-axis and Y-axis. The corners of the glass sheet are characterized in that the corners of the glass sheet are formed by moving means of a grinding unit which is freely movable on a shaft, simultaneously grinding four corners of the glass sheet into an arc shape, and enabling chamfering of upper and lower edges. Part grinding device. 2. The corner grinding of a glass sheet according to claim 1, wherein the direction of movement of one of the moving means of the grinding unit in the X and Y axis directions is changed by an angle θ in the horizontal direction. apparatus. 3. The glass sheet according to claim 1, wherein the grinding wheel of said grinding means has a structure in which at least one or more grindstone portions having a U-shaped or V-shaped cross section are stacked. Corner grinding device.