JPH07237929A - Bending and breaking of thin plate glass and apparatus therefor - Google Patents

Abstract

PURPOSE:To provide a process for the bending and breaking of a thin plate glass and a breaking apparatus capable of uniformly bending and breaking a narrow edge part formed by applying a cutting line to a thin plate glass having a thickness of about <=3.3mm. CONSTITUTION:A pressing tool 8 for pressing and fixing a thin plate glass 2 is placed on a table 3 parallel to a cutting line 1 applied to an edge of the thin plate glass 2 protruding from an edge of the table 3. The pressing tool is made to be approachable to or separable from the cutting line. This apparatus is also provided with a fixing tool 10 having a side edge coinciding with the cutting line, contacting with the upper surface of the lifted thin plate glass 2 protruded at the side opposite to the table and placed above the table 3 and a lifting tool 16 supporting the lower surface of the thin plate glass, coinciding the cutting line with the side edge and clamping with the fixing tool 10 by the staggered lifting motions by a plurality of lifting cylinders 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a thin glass sheet having a thickness of about 3.3 mm or less with a score line and folds along the line.
Particularly, the present invention relates to a method and apparatus for evenly splitting narrow ears.

[0002]

2. Description of the Related Art As a method of breaking a glass plate along a cut line, it is known to apply a bending moment around the cut end, for example, Japanese Patent Laid-Open No. 53-88817.
In the gazette of the issue, while pressing the four corners of a strip material in which a scoring line is given with a chip made of diamond or cemented carbide on a plate glass with pressing pieces, a pressing angle is given to the pair of pressing pieces to press the strip material. A method of accelerating a crack by disposing a levitation rod that raises bending and floats in the vicinity of the pressing piece and accelerates the initiation of cracks is disclosed, and Japanese Utility Model Laid-Open No. 58-65329 discloses a work. A base provided with a strip protrusion capable of abutting downward along the cutting processing line, and a work holding device capable of moving up and down so that the strip protrusion appears on the upper surface of the base and a work can be placed on the upper face. A cutting device for plate-shaped glass or the like, which comprises a plate and a pressing means which is provided above the work holding plate and presses the work while opening the legs on both sides of the projection, is disclosed. Further, JP-A-5-13232 is disclosed. In the gazette of the publication, the scoring line of the glass plate is positioned at a predetermined position between the upstream side conveyor belt and the downstream side conveyor belt, and each clamping portion clamps both sides of the scoring line of the glass plate, Disclosed is a method and apparatus for cutting a glass plate in which a holding portion rotates following the rotation of an upstream or downstream conveyor belt, and at the same time the upstream or downstream conveyor belt is separated from each other.

[0003]

Problems to be Solved by the Invention JP-A-53-888
In the thin plate glass described in Japanese Patent No. 17, which gives the bending, the bending means is often due to manual work, and there is a problem that it is not possible to follow the recent labor saving. The publication of -65329 is configured such that a pressing force is applied to the work by the pressing means while a tensile stress is generated, but since the work is pressed while the legs are opened, there is no problem in the initial breaking. However, in the case of a long work piece, there is a problem that some means such as widening the open leg is required for the entire length of the cutting line, and both sides sandwiching the cutting line require an appropriate dimensional width, resulting in a decrease in yield. However, the mechanized one disclosed in Japanese Patent Laid-Open No. 5-132328 has a problem that the glass plate is located on the upstream and downstream conveyor belts. At the same time, the sandwiching part also rotates in the same way, but it requires a certain amount of surface area because it requires a plate width to apply rotational power, and when cutting the ears, etc., the product yield decreases, and further There is a problem with complicated equipment because a rotating means is required.

[0004]

DISCLOSURE OF THE INVENTION The present invention has an end in which a scoring line is provided on the upper surface of a thin glass sheet for the purpose of surely splitting and cutting without causing collision between the splitting end faces of each other with a simple structure. In a method of splitting thin glass in which the edge is projected from the edge of the table and both sides of the cut line are sandwiched to give a bending moment, the thin glass is pressed and fixed on the table in parallel with the cut line. Then, the lower surface edge of the thin glass sheet that coincides with the cutting line and protrudes on the side opposite to the table is raised above the table, and the edge of the thin glass sheet from the cutting line is clamped and press-contacted. A method of breaking a thin glass plate in which the thin glass plate is clamped and pressured while sequentially rising from one side of the streak line to the end point side thereof, and the edge of the thin glass plate having a cut line on the upper surface is attached to the end of the table. Placed so as to project from the edge, A pressing tool for pressing and fixing the thin glass plate is provided on the table in parallel with the table, and the table is provided at a position where the cutting line and the side edge are aligned with each other and the upper surface of the thin glass plate that protrudes and rises to the side opposite the table is brought into contact with the table. A vertically extending fixture that supports the lower surface of the thin glass and is vertically movable so that the cut line and the side edge coincide with each other is provided. A plurality of vertically moving lifting cylinders are arranged in series so that the lifting cylinders can be moved up and down with a time difference from one side of the cut line to the end point side thereof, and the thin glass plate is sandwiched. Urethane rubber is affixed to the sandwiching surface between the fixing tool and the elevating tool, and further, the pressing tool is mounted on a bridge that is laid horizontally on a linear guide that can be finely moved in the perspective direction of the cutting line, through a vertically movable cylinder. Thin plate to be placed To provide a bend-breaking apparatus of the class.

[0005]

[Operation] An edge of thin glass provided with a cut line is inserted between urethane rubbers opened between the fixture and the lift, and the cut line is aligned with the side edge of the lift near the table. The inserted thin glass plate on the opposite side is pressed and fixed by a pressing tool arranged on the table which is positioned in advance, and when the elevating tool is lifted slightly higher than the table surface, the edge of the thin glass plate is made of urethane rubber. When the urethane rubber is sandwiched and further raised to shrink the urethane rubber, the thin glass plate between the side surfaces of the pressing tool and the elevating tool receives a pulling moment along with a bending moment about the pressing tool as a shaft, and presses it up to the fixing tool. The elevating tool is such that the apparent edge between the elevating tool and the fixing tool is an edge of the sandwiched thin glass plate that is slightly lifted and obliquely inserted, and the bending moment is opposite to the bending moment. direction A bending load is applied, and the load and the bending moment are interlocked from one side end of an elevating cylinder to another adjoining elevating cylinder, so that the elevating tool ascends obliquely with respect to the fixing tool. Pressing against the fixture,
The splitting force generated by the pressure contact causes a vertical split in the cut line, commonly called a new, which moves sequentially from one side of the glass edge and the cut line to its end side, and is cut on the table side. The edge of the thin glass plate returns to the table surface from the ascended position of the edge of the thin glass for a very short distance as the bending moment generated by cutting is released, but the returning cutting surface is the unbroken cut side. From the above-mentioned pulling action caused by the rise of the above, the fine movement of the thin glass without being in contact with the cut surface of the thin glass sandwiched between the fixture and the lifting device, and the combination of the action of bending and pulling on the thin glass. In addition, by sandwiching with urethane rubber interposed, the adhesion is improved without slipping and the positional deviation between the cut line and the side edges of the fixture and the lifting tool is prevented, pressing against the same thickness of thin glass. The position of the tool is always If the constant, the bending moment due to the rise of the lifting device, the bending load is always constant, clean cut is obtained no flow to the cutting surface by the same condition.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of a thin glass breaker according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view in which a part of the thin glass breaker is cut away, and FIG. 2 is a side cross-sectional view taken along the line AA in FIG. The thin glass plate 2 placed on the table 3 and having the cut lines 1 on its upper surface is cut by a breaking device 4 arranged on one end side in the front-back direction of the table.

The folding device 4 is provided with linear guides 5 on both lateral sides of the table 3 at a position close to one end of the table 3 in the front-rear direction, and a bridge 6 is provided on a standing leg that is movable in the front-rear direction by the linear guides. The bridge 6 installed horizontally on the table 3 is provided with a pressing tool 8 which is vertically movable via cylinders 7, 7 and presses and fixes the thin glass plate 2 placed on the table 3. A rubber plate 18, which is an elastic body for preventing scratches and slips, is attached to the lower surface of the pressing tool.

A fixture in which a lower surface is disposed higher than the table surface at a position slightly apart from the edge of the table 3 near the pressing tool 8 and urethane rubber 9 having a rubber hardness of 90 ° is attached to the lower surface. The columns 10, 1 which stand 10 through the brackets 12, 12 fixed to the legs 11, 11 of the table.
A plurality of elevating cylinders 15, 15 ... Arranged in parallel with the pressing member 8 between the three, and arranged on a seat plate 14 fixed to the side surface of the table 3 at a lower position facing the fixing member. The fixture 10 that can be moved up and down through the pressing device 8 and faces the pressing device 8 side.
Elevator 16 is provided with a side edge at the same position as the side edge of Elevator 16, but as with fixture 10, an elevator 16 with urethane rubber 17 having a rubber hardness of 90 ° that is familiar with glass adhered to the upper surface.
Is moved upward while inclining by the elevating cylinders 15, 15 ...
When the inclined one end of the lifting / lowering tool 16 reaches the fixing tool and presses it, the other end side also rises in sequence, and finally the lifting / lowering tool 16
It incorporates a control mechanism in which the entire length of the above is pressed against the fixture 10.

The set values and operation of the present invention will be described below.
The thin plate glass 2 placed on the table 3 and having the scoring line 1 on the upper surface thereof is set at a predetermined position of the table, that is, the scoring line is set to a position slightly lower than the surface of the table 3 of the lifting tool 16. Move to the side edge, and in advance the linear guides 5, 5
The cylinders 7 disposed on the bridge 6 positioned by the above are operated to lower the pressing tool 8, and the pressing tool presses and fixes the thin glass plate on the table 3.

The plurality of lift cylinders 15, 15, arranged on the seat plates 14, 14, are continuously operated, and the lift cylinders are mounted on one of the columns 13 by a delay relay (not shown) incorporated in the control mechanism. From the side, the elevating tool 16 connected to each elevating cylinder is slightly tilted, and the edge of the thin glass 2 is raised above the surface of the table 3 while supporting the edge of the thin glass 2. From the starting side of the line 1, for example, the legs 11, 11 of the table
Struts 13 and 1, which are erected via brackets 12 and 12
3 is sandwiched between a fixture 10 which is horizontally mounted on 3 and the elevating / lowering device 16 via urethane rubbers 9 and 17, and the entire length of the inclined elevating / lowering device is clamped and pressure-contacted to the fixture 10 through the edge of the thin glass plate 2. Lifting tool 16 that is clamped and clamped to fixture 10
The vertical side of the thin glass plate 2 is lifted on the opposite side of the table 3 which is pressed and fixed by the pressing tool 8, and the glass surface is bent by a pulling force in the front-rear direction. The edge of the sandwiched thin glass plate 2 on the side opposite to the table with respect to the line 1 aligns the side edges of the elevator and the fixture 10 with the cut line 1 and inserts a very slight diagonal between the upper and lower sides thereof. When the fixture 10 and the lifting / lowering device 16 are pressed against each other in a state, a load is applied in a bending shape with the cut line as a boundary, and a new nuisance is generated from the one end of the inclined lifting / lowering device 16 to the other end side. When the rebound from the lifted position to the surface of the table 3 is caused by the pulling force, the cut end surface of the thin glass sheet 2 that has been cut and separated on the pressing tool 8 side is moved by progressively advancing by pressure contact with the fixing tool 10 and the fixing tool. Cutting of the opposite side sandwiched between 10 and the lifting tool 16 If the distance between the scoring line 1 and the pressing tool 8 is set in advance by a linear guide, the cutting end face of the thin glass sheet 2 of the same thickness is perpendicular to the glass surface and there is no step or protrusion. A clean cut having no piece was obtained, and the clean cut was obtained by setting the fixing tool 10 and the pressing tool 8 to the thickness of the thin glass plate 2 as follows.

Thickness of thin glass ... 0.7
mm: 1.1 mm: 2.0 mm Height of the fixture from the table surface ... 3.5 mm: 3.
5 mm: 3.5 mm Side distance between fixing tool and pressing tool ... 32.0 mm: 47.
0 mm: 77.0 mm If a table provided with an automatic cutting machine for applying the scoring line 1 is provided with a feed mechanism and positioning means, and the folding device 4 is provided at the end of the table, a series of flow mechanism lines are formed. A more efficient cutting operation is possible, and it is desirable that the lifting cylinder 15 is provided with a speed control. Further, the lifting cylinder 15 is disposed below both ends of the lifting tool 16 and one of the cylinders is operated to fix the lifting tool 16. When 10 is reached and pressure is applied, the other cylinder may be activated,
Further, instead of the pressing tool 8 that presses the thin glass sheet 2 by the cylinders 7 and 7 with the fixing tool 10 and the elevating tool 16 holding the edge of the thin glass sheet 2 in advance, the glass edge side on the pressing surface of the pressing tool 8. A roller for pressing and rotating may be provided.

[0013]

Industrial Applicability According to the present invention, the bending action force optimum for breaking the thin glass sheet is adjusted to sandwich the cut line, and the end portion of the cut line is pressed and clamped from the starting side, and the thin plate is bent. By applying the pulling force by the crevice, the crack will surely advance along the cut line, and there will be no collision between the cut end faces, and the cut surface will be a clean cut. Folding is possible and the production yield can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view in which a part of a thin glass breaker is cut away.

FIG. 2 is a side sectional view in which a part of AA of FIG. 1 is cut away.

[Explanation of symbols]

1 ... Cutting line 2 ... Thin glass 3 ... Table 4 ... Folding device 8 ... Pressing tool 10 ... Fixing tool 15・ ・ ・ Lifting cylinder 16 ・ ・ ・ ・ ・ Lifting tool

Claims (6)

[Claims] 1. A method for breaking a thin glass sheet, wherein an edge of a thin glass sheet having a scoring line on its upper surface protrudes from an edge of a table, and both sides of the scoring line are clamped to provide a bending moment. The thin glass plate is pressed and fixed in parallel with the cut line on the table, and the lower surface edge of the thin glass plate that is aligned with the cut line and protrudes on the side opposite to the table is raised above the table, A method for splitting thin glass, in which an edge of the glass from the cut line is clamped and pressure-welded. 2. The method of breaking a thin glass sheet according to claim 1, wherein the thin glass sheet is clamped and pressed while being successively raised from one side of the score line to the end point side thereof. 3. A pressing tool for pressing and fixing the thin glass sheet on the table such that an edge of the thin glass sheet having a cut line on its upper surface is placed so as to project from the edge of the table and the thin glass sheet is pressed and fixed in parallel with the cut line. A fixing tool which is provided on the upper surface of the thin glass plate which is located at a position where the cutting line and the side edge are aligned with each other and abuts the upper surface of the thin glass plate which protrudes to the side opposite to the table side and abuts on the upper surface of the thin glass plate; A folding device for a thin sheet glass in which the fixing tool and the sandwiching lifting tool are arranged so that the cutting line and the side edge coincide with each other and are vertically movable. 4. A plurality of elevating cylinders for vertically moving the elevating device are arranged in series, and the elevating cylinders are interlocked so as to rise with a time lag from one side of the score line to the end point side thereof. The thin glass breaker according to claim 3. 5. A urethane rubber is adhered to a sandwiching surface between the elevating tool and the fixing tool that clamps the thin glass plate.
4. A thin glass breaker according to any one of claims 1 to 4. 6. The thin glass sheet according to claim 3, wherein the pressing member is disposed on a bridge that horizontally extends on a linear guide that can be finely moved in a direction near and far of the cut line through a vertically movable cylinder. Folding device.