JPH0730268Y2 - Flat glass polishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a polishing apparatus for continuously polishing the four peripheral edges of a plate glass.

[Conventional technology]

Conventionally, the method of continuously polishing the four peripheral edges of the rectangular plate glass is such that while the plate glass is run by the upstream conveying path, the edges of the two sides located on the left and right of the plate glass are polished by a rotating grindstone, and then the turning device is used. The fed plate glass is rotated 90 ° to position the unpolished edges to the left and right, and the plate glass is fed to the downstream transport path to run, while the edges located on the left and right sides of the plate glass are polished with a rotating grindstone while traveling. To do.

Further, the downstream conveying path for receiving the sheet glass from the swivel device is configured so that a difference in length occurs on the receiving side between the upper short conveyor and the lower long conveyor that are aligned on the take-out side. The flat glass that has been transferred to the receiving side is placed on both sides of the long conveyor, and the flat glass that is placed on both sides of the long conveyor is sandwiched by a holding belt conveyor that corrects the length direction of the short glass. The plate glass held by the receiving side and sandwiched by the upper and lower conveyors is conveyed so as to be polished by a rotary grindstone.

[Problems to be solved by the device]

By the way, in the supply of sheet glass to the downstream conveying path, the cutting edge that is sandwiched by the sandwich belt conveyor before polishing the sheet glass is often not perpendicular to the sheet surface as shown in FIG. , The method of feeding the plate glass into the downstream conveying path with reference to the cut surface before polishing as described above is a problem that the two edges sandwiching the previously polished edge and the edge of the edge before polishing are not finished at right angles. was there.

Therefore, an object of the present invention is to provide a plate glass polishing apparatus capable of automatically polishing the four peripheral edges of a rectangular plate-shaped glass so that two adjacent sides are at a right angle.

[Means for Solving the Problems]

In order to solve the above problems, the present invention arranges a traveling body that moves forward and backward along the sheet glass conveying direction of the downstream conveying path between the receiving side end portions of the downstream conveying path of the turning device,
In the lower part of this traveling body, at the positions on both sides in the sheet glass transport direction,
It is movable up and down, and two pairs of front and rear reference holding bodies that sandwich the edges of the abrasives located in the front and rear of the sheet glass conveyance direction when descending are provided, and further move up and down to the positions on both sides under the traveling body. A pair of polishing allowance positioning holding bodies that hold both side edges of the sheet glass in the conveying direction when descending are provided, and the traveling body moves forward to the downstream conveying path side, and the sheet glass moves downstream of the reference holding body and the positioning holding body. When sandwiched and transported to the transport path, each of them is lifted to release the sandwiching of the sheet glass.

[Action]

When the sheet glass is supplied from the receiving end to the upstream conveying path, the edges located on the left and right in the traveling direction of the sheet glass are polished by the rotating grindstone during the conveyance, and then the sheet glass is swung 90 ° by the swivel device, and then this sheet glass is swung. Is supplied to the downstream transport path, and the edges located on the left and right in the transport direction are polished by a rotary grindstone.

The plate glass which is swung 90 ° by the swivel device and is supplied to the downstream conveyance path is first of all the front part in which the polished edge located in the front in the conveyance direction is stopped at the retracted position and the traveling body is waiting to descend. Abutting on the reference holding body, then lowering the positioning holding body on one side, and then lowering the positioning holding body on the other side, sandwiching the side edges positioned on the left and right in the sheet glass transport direction by both positioning holding bodies. After positioning the polishing allowance, and then moving the reference holding body located in the rear of the transport direction in the transport direction while lowering it, the polished edges of the plate glass before and after the transport direction are sandwiched from the front and back and polished. Make sure that the edges are at right angles to the transport direction.

Then, while advancing the traveling body, the plate glass is sent to the downstream conveyance path, the reference holding body and the positioning holding body are respectively raised, and then the traveling body is retracted.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in the figure, the conveying path for holding and traveling the plate surface of the plate glass A is arranged in parallel at a predetermined interval on the left and right sides, and is constituted by a belt conveyor 1 in which two upper and lower pairs form one set. The transport path 2 and the downstream transport path 3 are arranged in series, and the receiving side end of the lower belt conveyor 1 of the downstream transport path 3 is in the direction of the upstream transport path 2 more than the receiving side end of the upper belt conveyor 1. It is made to protrude greatly.

On both sides of the upstream transport path 2 and the downstream transport path 3, rotary grindstones 4 and 5 for polishing the edges of the plate glass A located on the left and right in the transport direction are provided.

In the illustrated case, the rotary grindstones 4 and 5 are chamfered and polished in addition to the edge surface.

Between the upstream transport path 2 and the downstream transport path 3, the plate glass A
A swivel device B for swiveling 90 ° is provided.

As shown in FIG. 4, the swivel device B described above includes a horizontal rail 6 laid outside of one side of the conveying path, and a slider 8 in which a groove 7 is fitted in the rail 6 and slide-guided in the front-rear direction. A cylinder 9 which is connected to the slider 8 and which moves the slider 8 forward and backward by expansion and contraction, a vertical cylinder 10 supported by the slider 8, and a center of a piston 11 of the cylinder 10, and A pipe 12 supported by the piston 11, a suction cup 13 provided at a lower end of the pipe 12, and a pinion 14 fixed to an upper portion of the pipe 12.
A horizontal rack 15 attached to the fixed part so as to mesh with the pinion 14, a spring 16 for pushing up the piston 11,
It is composed of a suction hose (not shown) connected to the upper end of the pipe 12, and when the plate glass A is fed from the upstream conveying path 2 onto the table 17 ', the cylinder 10 is caused to act and the piston
When the pipe 12 is lowered together with 11, the suction cup 13 is pressed against the upper plate surface of the plate glass A, and the inside of the pipe 12 is sucked, and the depression of the cylinder 10 is released at the same time, the piston 16 rises by the spring 16 and the suction cup 13 The plate glass A adsorbed by the above is floated from the table 17 '.

After that, when the cylinder 9 is extended and the slider 8 is moved forward, the pipe 15 is rotated by the rack 15 and the pinion 14 to rotate the plate glass A, and when the rotation reaches 90 °, the expansion of the cylinder 9 is stopped. To do.

After that, the cylinder 10 is actuated to lower the piston 11, after which the suction inside the pipe 12 is released, and
When a little air is pressed into the inside 12, the plate glass A with the suction cup 13
Is removed, and the plate glass A is transported by the belt conveyor 1 in the downstream transport path 3.

After the suction of the plate glass A is released, the suction pipe 13 and the pipe 12
Is raised, and the cylinder 9 is contracted to retract the slider 8.

Between the front side (downstream) of the turning device B and the receiving end of the downstream carrier 3, a traveling body 18 guided in the front-rear direction by a horizontal rail 17 is provided, and one end of the rail 17 is supported. The other end of the cylinder 19 is connected to the traveling body 18 to move the traveling body 18 back and forth, and the pins 20 attached to the traveling body 18 are provided at the lower left and right positions on both sides of the traveling body 18.
Cylinder supported midway by and connected to the upper end
Two pairs of front and rear reference holding bodies 22 and 23 are provided, which are rotated up and down with the pin 20 as a fulcrum on the downstream side due to expansion and contraction of 21.

As shown in FIG. 3, the reference holding body 23 located on the rear side is attached to a slider 29 with a female screw 28 screwed into a male screw 27 driven by a motor 26, depending on the size of the plate glass A. The distance between the front reference holding body 22 and the front reference holding body 22 can be freely adjusted.

Further, a pair of positioning holding bodies 24 and 25 for sandwiching the plate glass A from both sides are provided at positions on both sides below the traveling body 18. Although the illustration of the positioning holding bodies 24 and 25 is omitted, the positioning holding bodies 24 and 25 have the same structure as the reference holding bodies 22 and 23 described above,
It is designed to rotate up and down by a cylinder.

The polishing apparatus of the present invention has the above-mentioned configuration, and a method of polishing plate glass will be described next.

The plate glass A supplied to the upstream conveying path 2 has its both edges polished by a rotating grindstone 4 during the conveyance, and the plate glass A is supplied onto the table 17 'of the turning device B and turned 90 °, and then the downstream conveying path 3 On the lower belt conveyor.

The traveling body 18 is stopped at the retracted position as shown in the actual battle in FIG. 3, and the reference holding body 22 in the front portion is rotated downward,
The plate glass A after turning is sent forward in the downstream transport path 3 and the polished edge located forward in the transport direction is the reference holding body 22.
When it comes into contact with, the one positioning holding body 24 is rotated downward, and the plate glass A is sandwiched from both sides by the other positioning holding body 25 which is rotating downward first, and the position of the polishing margin on both sides is corrected. To do.

After that, the rear reference holding body 23 is rotated downward, and the front and rear reference holding bodies 22 and 23 sandwich the plate glass A from the front and back. As a result, orientation is performed so that the polished edge of the plate glass A is at a right angle to the transport direction.

After this direction is taken out, the cylinder 19 extends and the traveling body 18 moves forward to feed the sheet glass A forward and feed it between the upper and lower belt conveyors 1 in the downstream conveying path 3, where the sheet glass A is sandwiched and conveyed. Then, each cylinder 21 is immediately actuated, the reference holding bodies 22 and 23 and the positioning holding bodies 24 and 25 are rotated upward, the holding of the plate glass A is released, and then the cylinder 19 is extended and operated to extend the traveling body. Retract 18 to the rear position.

The plate glass A sent to the downstream conveyance path 3 has its front and rear polished edges advancing at right angles to the conveyance direction, and both edges thereof are polished by the rotary grindstone 5 during the conveyance. Therefore, both edges are polished at right angles to the front and rear edges that have been previously polished.

[Effect of device]

As described above, according to the present invention, when polishing the remaining two edges of the sheet glass in the downstream conveying path, the reference holding body before and after the conveying direction holds the polished edge in the upstream conveying path, and then travels. Since the plate glass is fed into the downstream transport path while transporting the body forward, the polished edge is positioned at a right angle to the transport direction, and it is possible to transport with the polished edge as a reference. Can be polished to always be 90 °.

Further, the left and right positioning holders can equalize the polishing margins on both side edges of the plate glass to be polished in the downstream conveyance path, and eliminate the problem that one polishing margin increases.

[Brief description of drawings]

FIG. 1 is a plan view of a polishing apparatus according to the present invention, FIG. 2 is a partially cutaway enlarged plan view showing a main part of the same, FIG. 3 is a partially cutaway front view of the same part, and FIG. A vertical front view of the device,
FIG. 5 is a vertical sectional front view of the plate glass. A ... plate glass, B ... swivel device, 1 ... belt conveyor, 2 ... upstream transport path, 3 ... downstream transport path, 4,5 ...
Rotary whetstone, 6 ... Rail, 7 ... Groove, 8 ... Slider,
9, 10 ... Cylinder, 11 ... Piston, 12 ... Pipe,
13 …… Sucker, 14 …… Pinion, 15 …… Rack, 16 …… Spring, 17 …… Rail, 18 …… Running body, 19 …… Cylinder, 20
...... Pin, 21 …… Cylinder, 22, 23 …… Reference holding body, 2
4, 25 …… Positioning holder.

Claims (1)

[Scope of utility model registration request] 1. A traveling direction of a sheet glass on the upstream conveying path while a swivel device is provided between an upstream conveying path and a downstream conveying path for sandwiching and conveying the sheet surface of the sheet glass so as to sandwich the sheet surface of the sheet glass for traveling. Polish the edges located on the left and right with a rotating grindstone,
Then, after turning the plate glass 90 ° by the turning device,
In a plate glass polishing device that polishes the edges located on the left and right in the running direction of the plate glass in the downstream transport path with a rotating grindstone, between the swivel device and the receiving end of the downstream transport path, along the glass transport direction of the downstream transport path. A traveling body that moves forward and backward is arranged, and it can move up and down at positions on both sides of the sheet glass conveyance direction at the lower part of this traveling body, and when it descends, it holds the polished edges located before and after the sheet glass conveyance direction. Two pairs of front and rear reference holding bodies are provided, and a pair of polishing allowance positioning holding bodies that can move up and down at both sides of the lower part of the traveling body and hold both side edges of the sheet glass in the conveying direction when descending are provided. The reference holding body and the positioning holding body are provided so that when the traveling body moves forward toward the downstream conveyance path and the sheet glass is nipped and conveyed to the downstream conveyance path, it is lifted and the sheet glass is unpinched. And a plate glass polishing device.