JPH0631609A - Polishing device of glassy commodity having curved surface - Google Patents

Abstract

PURPOSE:To enhance the duration of use of a hollow cylinder polishing body that polishe. the curved surface of a glassy commodity, and provide polishing device capable of polishing that curved surface uniformly irrespective of the size of the glassy commodity. CONSTITUTION:The polishing device of a glassy commodity having a curved surface is provided with a rotary table 11 that fixes a glassy commodity 10 having a curved surface 10a in a state wherein the curved surface 10a is positioned upside and rotates, an elastic hollow cylinder grinding 12 that performs rotational polishing of the curved surface 10a of the glassy commodity 10, a guide shaft 13 provided in parallel with the rotary shaft 12a of the hollow cylinder polishing body 12, a movable frame 14 that supports the rotary shaft 12a of the hollow cylinder polishing body 12 and that slidably mounted on the guide shaft 13, and a driving means 15 that slides the movable frame 14 along the guide shaft 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for polishing a glass article having a curved surface such as a cathode ray tube panel.

[0002]

2. Description of the Related Art Conventionally, in order to polish a curved surface of a glass article such as a panel for a cathode ray tube, for example, a hollow cylindrical polishing body 1 having compressed air inside and having elasticity as shown in FIG. A polishing device is used that polishes the curved surface 2a of the glass article 2 which is fixedly placed on the rotary table 3 and rotated while being pressed and polished.

[0003]

However, in the above-described conventional polishing apparatus, the hollow cylindrical polishing body 1 is provided at a fixed fixed position with respect to the glass article 2 and therefore the glass article 2 is not fixed.
Only a certain portion that comes into contact with the curved surface 2a will be worn. As the abrasion of the hollow cylindrical polishing body 1 progresses, the polishing action is significantly reduced. Therefore, the hollow cylindrical polishing body 1 itself is not removed even though there is a portion which is not worn without contacting the curved surface 2a. I have to replace it.

When the small-sized glass article 2 is first polished by using the hollow-cylindrical polishing body 1 and then the larger-sized glass article 2 is polished, the hollow-cylindrical polishing body 1 is worn. The worn portion and the non-abraded portion come into contact with the curved surface 2a of the glass article 2 and, as a result, the disadvantage that uniform polishing cannot be performed occurs.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and improves the service life of a hollow cylindrical polishing body for polishing a curved surface of a glass article, regardless of the size of the glass article.
It is an object of the present invention to provide a polishing device capable of uniformly polishing the curved surface.

[0006]

According to the present invention, there is provided a rotary table for placing and rotating a glass article having a curved surface with the curved surface facing upward, and an elastic hollow for rotationally polishing the curved surface of the glass article. A cylindrical polishing body, a guide shaft arranged in parallel with the rotation axis of the hollow cylindrical polishing body, and a moving frame slidably attached to the guide shaft, which supports the rotation shaft of the hollow cylindrical polishing body. And a drive means for sliding the moving frame along the guide shaft, to provide a polishing apparatus for a glass article having a curved surface.

[0007]

According to the present invention, the moving frame for supporting the hollow cylindrical polishing body is slid by the driving means along the axial direction of the guide shaft arranged parallel to the rotation axis of the hollow cylindrical polishing body. Since the hollow cylindrical polishing body is configured to move in the rotation axis direction, the entire surface of the hollow cylindrical polishing body can be used for polishing work. Extends. Further, as a result of the uniform wear of the hollow cylindrical polishing body, the curved surface can be uniformly polished regardless of the size of the glass article.

[0008]

1 is a front view of a polishing apparatus for glass articles according to the present invention, in which 10 is a glass article, 11 is a rotary table,
Reference numeral 12 is a hollow cylindrical polishing body, 13 is a guide shaft, 14 is a moving frame, and 15 is a driving means.

The glass article 10 is positioned and placed on the rubber support 11a on the rotary table 11 with the curved surface 10a facing upward. The glass article 10 is, for example, a shape having a curved surface 10a such as a panel for a cathode ray tube, but is not limited to this and can be applied to other shapes.

The rotary table 11 includes a rubber support 11a.
The glass article 10 positioned and placed with the curved surface 10a facing upward is rotationally driven at a fixed position by a motor 16.

The hollow cylindrical polishing body 12 integrally has a rotating shaft 12a extending on both sides in the axial direction, and is rotatably supported by a supporting arm 14a of the moving frame 14 via the rotating shaft 12a. The curved surface 10 of the glass article 10 on the rotary table 11 is rotationally driven by a motor 17 installed above via a transmission means 18 such as a belt and a pulley.
a is rotationally polished. This hollow cylindrical polishing body 12
Is made of an elastic body such as rubber, has a hollow interior, and is supplied with low-pressure compressed air from one end of the rotary shaft 12a through a suitable rotary airtight joint (not shown).

The moving frame 14 is slidably attached to the guide shaft 13 arranged on the machine base 19 in parallel with the rotary shaft 12a of the hollow cylindrical polishing body 12, and the guide shaft 1
By rotating the swing arm 13a fixed to one end of 3 with a cylinder 20 installed in a part of the machine base 19, it is possible to swing up and down with the guide shaft 13 as a fulcrum. The downward movement of the moving frame 14
The hollow cylindrical polishing body 12 is elastically pressed against the curved surface 10a of the glass article 10 with a predetermined polishing pressure via the above, and can be retracted upward. Specifically, the guide shaft 13 is rotatable on the machine base 19 and is supported so as not to move in the axial direction.
On the other hand, the moving frame 14 rotates integrally with the guide shaft 13, but the guide shaft 13 in a portion corresponding to the sliding range of the moving frame 14 is slidable in the axial direction.
Is a square shaft portion, and the moving frame 14 is also fitted with a square hole.

The drive means 15 is for sliding the moving frame 14 along the guide shaft 13 at a predetermined time,
A support cylinder of a support bracket 15c that includes a screw shaft 15a and a nut member 15b that is screwed to the screw shaft 15a. The nut member 15b is fixed to the end of the moving frame 14, and the screw shaft 15a is fixed to the end of the guide shaft 13. 15d is rotatably supported so as not to move in the axial direction, and at a predetermined time, the moving frame 14 is moved along the guide shaft 13 by rotating the handle 15e fixed to the end of the screw shaft 15a. It is what makes me.

An embodiment of the present invention has the above-mentioned configuration,
Next, the operation will be described. First, the glass article 10 is positioned and placed on the turntable 11 with the curved surface 10a facing upward. At this time, the motor 16 of the rotary table 11 is stopped, and the hollow cylindrical polishing body 12 is moved to the cylinder 2
When the number is 0, the moving frame 14 and the moving frame 14 are retracted upward.

When the glass article 10 is positioned and mounted on the rotary table 11 with the curved surface 10a facing upward, the motor 16 of the rotary table 11 is rotated and the cylinder 20 is placed.
By the moving frame 14 and the hollow cylindrical polishing body 12
Is the curved surface 10a of the glass article 10 on the turntable 11.
Is elastically pressed at a predetermined polishing pressure. At this time, the motor 1
The hollow cylindrical polishing body 12 is rotationally driven by rotating 7. Further, an abrasive is continuously supplied from a nozzle (not shown) or the like to the contact surface between the curved surface 10a of the glass article 10 and the hollow cylindrical polishing body 12. In this way, the entire curved surface 10a of the glass article 10 rotated by the rotary table 11 at the fixed position is uniformly polished by the hollow cylindrical polishing body 12.

In this way, glass articles 1 of the same size
By sequentially polishing the curved surface 10a of 0, the hollow cylindrical polishing body 12 is worn only at a certain portion in contact with the curved surface 10a of the glass article 10. Therefore,
According to the present invention, the operator manually rotates the handle 15e of the drive means 15 periodically or at a predetermined time to move the hollow cylindrical polishing body 12 together with the moving frame 14 in the axial direction, and the glass article. The position of contact with the curved surface 10a of 10 is changed. As a result, the wear of the hollow cylindrical polishing body 12 can be prevented from being localized at a certain place, and the entire surface can be uniformly worn.
The operation of changing the contact position of the hollow cylindrical polishing body 12 by the driving means 15 can be performed at any time, such as during polishing work.

The embodiment of the present invention has been described above.
The present invention is not limited to the above embodiment, but various modifications can be made. For example, the driving means 15 may be of a system that is automatically operated. In addition, the rotary table 11 is mounted at appropriate intervals on a conveyor that moves in the front-back direction of the paper surface in FIG. 1, and a plurality of polishing devices of the present invention are arranged along the moving direction of the conveyor for each rotation. Table 1
1. A glass article 10 which is positioned and mounted on a substrate 1 and driven to rotate.
The present invention can be applied to an in-line type polishing apparatus in which the curved surface 10a is sequentially polished by a plurality of hollow cylindrical polishing bodies 12.

[0018]

According to the present invention, since the entire surface of the hollow cylindrical polishing body can be used for polishing work, the hollow cylindrical polishing body is evenly worn on average and the service life thereof is extended. Further, as a result of the uniform wear of the hollow cylindrical polishing body, the curved surface can be uniformly polished regardless of the size of the glass article.

[Brief description of drawings]

FIG. 1 is a front view of a curved surface polishing apparatus according to the present invention.

FIG. 2 is a side view taken along the line II-II of FIG.

FIG. 3 is a schematic view of a conventional curved surface polishing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Glass article 10a Curved surface 11 Rotary table 12 Hollow cylindrical polishing body 12a Rotating shaft 13 Guide shaft 14 Moving frame 15 Driving means

Claims (1)

[Claims] 1. A rotary table for placing and rotating a glass article having a curved surface with the curved surface facing upward, and an elastic hollow cylindrical polishing body for rotationally polishing the curved surface of the glass article.
A guide shaft arranged in parallel with the rotary shaft of the hollow cylindrical polishing body, a moving frame supporting the rotary shaft of the hollow cylindrical polishing body and slidably attached to the guide shaft, and the moving frame. And a drive means for sliding the glass along the guide shaft, and a polishing device for a glass article having a curved surface.