Method for processing brittle plate, and device for processing brittle plate

Patent metadata

Field	Value
Publication number	US-9822029-B2
Application number	US-201615181599-A
Country	US
Kind code	B2
Filing date	Jun 14, 2016
Priority date	Dec 27, 2013
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A method for processing a brittle plate includes a breaking step in which a pressing member for pressing a surface of the brittle plate and a support member for supporting a back face of the brittle plate are used to bend and deform the brittle plate and break the brittle plate along a score line formed on the surface of the brittle plate. The support member includes a flat portion that is arranged flat against one portion of the brittle plate to support the brittle plate, and a regulating portion that regulates a bending deformation shape of the brittle plate when the pressing member is pressed against a predetermined position of a remaining portion of the brittle plate. The breaking step includes breaking the brittle plate along the score line that is within the remaining portion of the brittle plate.

First claim

What is claimed is:

1. A method for processing a brittle plate, the method comprising:
a breaking step that includes using a pressing member for pressing a surface of the brittle plate and a support member for supporting a back face of the brittle plate to bend and deform the brittle plate and break the brittle plate along a score line formed on the surface of the brittle plate;
wherein the support member includes a flat portion that is arranged flat against one portion of the brittle plate to support the brittle plate, and a regulating portion that regulates a bending deformation shape of the brittle plate when the pressing member is pressed against a predetermined position of a remaining portion of the brittle plate; and
wherein the breaking step includes breaking the brittle plate along the score line that is within the remaining portion of the brittle plate by supporting the one portion of the brittle plate that is arranged flat against the flat portion and pressing the pressing member against the predetermined position of the remaining portion of the brittle plate.

2. The method for processing a brittle plate according to claim 1 , wherein
at least a part of the score line is included within a portion of the brittle plate that is supported by the regulating portion when the pressing member is pressed against the brittle plate.

3. The method for processing a brittle plate according to claim 1 , wherein
the regulating portion includes a regulating face that does not support the back face of the brittle plate before the pressing member is pressed against the brittle plate but supports the back face of the brittle plate when the pressing member is pressed against the brittle plate, and the regulating portion regulates the bending deformation shape of the brittle plate according to a shape of the regulating face.

4. The method for processing a brittle plate according to claim 3 , wherein
an inclination angle of the regulating face with respect to a flat surface of the flat portion that supports the brittle plate is from 0.3° to 5°.

5. The method for processing a brittle plate according to claim 1 , wherein
the regulating portion regulates the bending deformation shape of the brittle plate by undergoing elastic deformation according to a pressing force exerted by the pressing member.

6. The method for processing a brittle plate according to claim 1 , wherein
the score line includes a recessed portion that is recessed toward the flat portion in plan view.

7. The method for processing a brittle plate according to claim 1 , wherein
an outer edge of a flat surface of the flat portion that supports the brittle plate does not include a recessed portion that is recessed inward.

8. The method for processing a brittle plate according to claim 1 , wherein
an outer edge of a flat surface of the flat portion that supports the brittle plate includes a recessed portion that is recessed inward; and
the score line, in plan view, does not overlap a region surrounded by the recessed portion of the outer edge and a straight line connecting two ends of the recessed portion of the outer edge.

9. The method for processing a brittle plate according to claim 1 , wherein
the regulating portion surrounds an outer edge of the flat portion.

10. A device for processing a brittle plate, the device comprising:
a pressing member for pressing a surface of the brittle plate; and
a support member for supporting a back face of the brittle plate;
wherein the pressing member and the support member are used to bend and deform the brittle plate and break the brittle plate along a score line formed on the surface of the brittle plate;
wherein the support member includes a flat portion that is arranged flat against one portion of the brittle plate to support the brittle plate, and a regulating portion that regulates a bending deformation shape of the brittle plate when the pressing member is pressed against a predetermined position of a remaining portion of the brittle plate; and
wherein the device breaks the brittle plate along the score line that is within the remaining portion of the brittle plate.

11. The device for processing a brittle plate according to claim 10 , wherein
the regulating portion includes a regulating face that does not support the back face of the brittle plate before the pressing member is pressed against the brittle plate but supports the back face of the brittle plate when the pressing member is pressed against the brittle plate, and the regulating portion regulates the bending deformation shape of the brittle plate according to a shape of the regulating face.

12. The device for processing a brittle plate according to claim 11 , wherein
an inclination angle of the regulating face with respect to a flat surface of the flat portion that supports the brittle plate is from 0.3° to 5°.

13. The device for processing a brittle plate according to claim 10 , wherein
the regulating portion regulates the bending deformation shape of the brittle plate by undergoing elastic deformation according to a pressing force exerted by the pressing member.

14. The device for processing a brittle plate according to claim 10 , wherein
an outer edge of a flat surface of the flat portion that supports the brittle plate does not include a recessed portion that is recessed inward.

15. The device for processing a brittle plate according to claim 10 , wherein
the regulating portion surrounds an outer edge of the flat portion.

Assignees

• Asahi Glass Co Ltd

Inventors

• Yamamoto Takashi
• Ishibashi Toshiyuki
• Endo Mitsuhiko
• Kasajima Masashi

Classifications

• B26F3/00

  Severing by means other than cutting; Apparatus therefor (severing by grinding B24B27/06) · CPC title

• B28D1/222

  by pressing, e.g. presses · CPC title

• C03B33/033 Primary

  Apparatus for opening score lines in glass sheets · CPC title

• B26F3/002

  Precutting and tensioning or breaking · CPC title