Glass substrate positioning apparatus, positioning method, edge plane polishing apparatus and edge plane polishing method

Abstract

The present invention provides a glass substrate positioning device which comprises the receiving member 3 that can be abutted on one side 2a (2c) of the glass substrate 2, and a pushing member 4 that can be abutted on the other side 2b (2d) parallel to the side 2a (2c) to push the glass substrate 2 toward the receiving member 3. The glass substrate 2 is positioned by cooperative action of the receiving member 3 and the pushing member 4. The receiving member 3 is set to be movable to follow the pushing action of the glass substrate 2. Positioning of the glass substrate 2 is performed based on displacement quantity of the other side 2b (2d) of the glass substrate 2 when it is pushed by the pushing member 4 as the side 2a (2c) of the glass substrate 2 is abutted on the receiving member 3.

Description

technical field [0001] The present invention relates to a positioning device and method for a glass substrate, and an end grinding device and method, and more particularly to a positioning device and a method for accurately positioning a glass substrate that needs to be held in a normal position in a normal posture, and positioning thereby An end surface grinding device and method for grinding an end surface of a glass substrate after completion. Background technique [0002] As everyone knows, when manufacturing glass panels for various image display devices such as liquid crystal displays, plasma displays, electroluminescent displays, and electroluminescent displays, the cut end faces of glass substrates, that is, glass substrates with sharp cut end faces, are processed in the production process. Grinding to obtain the required size or end face characteristics. [0003] It is customary to carry out such end surface grinding by making the grinding piece relatively move alo...

AI Technical Summary

Problems solved by technology

[0010] However, the above Image 6 and Figure 7 Any of the positioning device shown and the position detection device disclosed in Patent Document 1 is fixed with a stopper member (fixed roller, fixed plate, and reference stopper) functioning as a stopper, and therefore, causes grinding to occur. The sharp edge (cut end face) of the pre-shaved glass substrate comes into contact with the stopper with a relatively large impact force

[0011] Therefore, it may cause the blocking member to be chipped due to the sharp edge of the glass substrate, thereby causing premature wear, the positioning of the glass substrate is unstable, or the blocking member is scratched so that the edge of the glass substrate is caught at the scratch, or Difficulty moving to the correct position, etc. so-called bad situations

[0012] Moreover, any of these devices positions the glass substrate with the abutting portion of the stopper member as a reference. Therefore, when the abutment portion of the stopper member is worn as described above, the abutment position of the glass substrate changes at one point. , so there is a risk that the positioning accuracy of the glass substrate will deteriorate

[0013] Also, as described above, when the positioning of the glass substrate is hindered, for example Figure 8 As shown, the attitude of the glass substrate 20 placed on the mounting surface of the working table 50 by adsorption and holding becomes unstable, and the grinding amount t of the glass substrate 20 becomes large.

In such a state, the grinding speed needs to be slowed down, and the processing efficiency is deteriorated, and the amount of grinding is uneven, so the surface quality of the ground surface is reduced.

[0014] Furthermore, since the size of the glass substrate has been increased in recent years, it is difficult to move the glass substrate smoothly, and the glass substrate is skewed. Therefore, it is also impossible to properly contact the glass substrate with the stopper by the action of the pressing member. bad situation

[0015] On the other hand, the chamfering apparatus disclosed in the above-mentioned Patent Document 2 does not position the glass substrate by contacting the rollers, but first positions the pair of rollers and then conveys the glass substrate between the two rollers. Of course, the problem in the case of positioning the glass substrate against the stopper member as described above cannot be solved.

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