JPS63166734A - Apparatus for cutting flat glass plate - Google Patents

Abstract

PURPOSE:To cut a flat glass plate in high squareness, preventing the generation of chipping, by placing a flat glass plate on a base table, lowering a cylinder head having a specific elastic member to contact the elastic member with the glass plate and applying hydraulic pressure force to the elastic member with a hydraulic unit. CONSTITUTION:A hard rubber elastic member 11 to uniformize the cutting pressure over a definite width is attached to a cylinder head 12 having an oil channel to transmit oil-pressure 18 from a hydraulic unit to the elastic member 11 and the cylinder head 12 is made to be vertically movable with a cylinder 13. A flat glass plate 16 is placed on a base table 14 interposing a cushioning sheet 15 therebetween, the scribe line of the plate is positioned to the center of the elastic member 11 and the glass plate is fixed to the base table by vacuum suction. The cylinder 13 is lowered to contact with the flat glass plate 16 and oil-pressure 18 is applied to exert a compression force 19 to the elastic member 11 and generate concentrated stress to the part of the elastic member 11 contacting with the surface of the flat glass plate 16. The flat glass plate 16 is cut along the scribed line by the tensile force 20 caused by lateral elongation of the elastic member.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flat glass cutting apparatus for breaking and cutting flat glass.

BACKGROUND OF THE INVENTION In recent years, flat glass cutting apparatuses have been used to cut flat glass by applying pressure with a semicircular or V-shaped pressure plate made of hard rubber or resin in line with the scribe line on the surface facing the scribe line.

An example of the conventional flat plate 2-based glass cutting apparatus described above will be described below with reference to the drawings.

FIGS. 3 and 4 show the structure and operation of a conventional flat glass cutting apparatus.

In FIG. 3, 1 is a pressure plate made of resin.

2 is a cylinder head having a pressure plate 1; 3 is a cylinder that drives the cylinder head 2 up and down.

Reference numeral 4 denotes a base that attracts the flat glass 6 and sets a predetermined position. 6 is a cushion sheet provided between the flat glass 6 and the base 4.

A scribe line made on the flat glass 6 is aligned with the arc center position of the pressure plate 1, and a cushion sheet 5 is laid between the base 4 and the flat glass 6, and the flat glass 6 is vacuum-adsorbed on the base 4. The operation of the flat glass cutting apparatus constructed as described above will be explained below with reference to FIG. 4.

First, when the cylinder 3 is instructed to move downward, the pressure plate 1 contacts the flat glass 6 and generates a pressure cuff. At the same time, a reaction force 8 is generated on the flat glass 63 from the cushion sheet 6, and the flat glass 6 is braked centering on the scribe line by an apparent movement as shown by P, and is divided into left and right sides with a stress 1o.

Problems to be Solved by the Invention However, with the above configuration, the fracture surface may tilt perpendicularly to the plane due to a slight misalignment between the scribe line and the pressurizing plate, and in the worst case where accurate division cannot be achieved, the scribe line may collapse. There was a problem in that chipping frequently occurred on the opposite side.

Means for Solving the Problems In view of the above-mentioned problems, the present invention provides a pressurizing unit that has an elastic body that equalizes the divided pressurizing force to a constant width and is driven up and down by a cylinder, and a pressurizing unit that applies the pressurizing force to the pressurizing unit. This device includes a pressure supply unit, a cushion sheet provided between the flat glass to be cut and the base, and a base.

Function: With the above-described configuration, the present invention applies a uniform pressing force to opposing surfaces of the scribe line with a width of, for example, about five times the scribe line width or more to generate concentrated stress on the scribe line, and The above problem can be solved by dividing the flat glass into left and right sides using the tension caused by the elongation of the glass.

EXAMPLE Hereinafter, a flat glass cutting apparatus according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of a flat glass cutting apparatus in an embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a hard rubber (elastic body) that equalizes the dividing pressure force to a constant width.

Reference numeral 12 denotes a cylinder head having a hard rubber 11 and an oil passage for transmitting the hydraulic pressure from the pressure unit through the hard rubber 11. 13 is a cylinder that drives the cylinder head 12 up and down. Reference numeral 14 denotes a base that attracts the flat glass 16 and sets a predetermined position. 16 is a cushion sheet provided between the base 14 and the flat glass 16. The operation of the flat glass cutting apparatus constructed as described above will be described below with reference to FIGS. 1 and 2.

First, the scribe line of the flat glass 16 is aligned with the center of the hard rubber (elastic body) 11, and the cushion sheet 15 is laid down and vacuum-adsorbed onto the base 14.

The cylinder 13 is lowered and stopped until it touches the flat glass 16. When the hydraulic pressure 18 is supplied, a pressurizing force 19 is applied to the hard rubber 11, and at the same time, the portion of the hard rubber 11 that is in contact with the flat glass surface starts to expand from side to side.
A dividing force 2o is generated at 6, causing it to be divided.

Effects of the Invention As described above, according to the present invention, concentrated stress is generated around the scribe line by providing an elastic body that equalizes the dividing pressure force to a constant width and a structure that applies hydraulic pressure force. In addition, by dividing the flat glass by the tension caused by stretching from side to side, it is possible to improve the perpendicularity between the fracture surface of the flat glass and the plane and to eliminate chipping.

[Brief explanation of the drawing]

Figure 1 is a block diagram of a flat glass cutting apparatus according to an embodiment of the present invention, Figure 2 is an explanatory diagram of the operation of Figure 1, and Figure 3 is a block diagram of a conventional flat glass cutting apparatus. FIG. 4 is an explanatory diagram of the operation of FIG. 3. 11...Elastic body, 12...Pressure unit, 13...Cylinder, 14...Base stand, 16...Cushion sheet, 16...
・・・Flat glass, 18. ·····hydraulic. Name of agent: Patent attorney Toshio Nakao and 1 other person14
-Ichigo'-zu Old Figure 3

Claims (1)

[Claims] (1) A pressure unit that is driven vertically by a cylinder and has an elastic body that equalizes the cutting pressure force to a certain width, a pressure supply unit that applies pressure force to the pressure unit, and the flat glass to be cut and the base. A flat glass cutting device consisting of a cushion sheet installed in between and a base stand.