JPH08253336A - Method for breaking off sheet glass and apparatus therefor - Google Patents

Abstract

PURPOSE: To cleanly break off a sheet glass having about <=3.3mm thickness in good yield by supporting the inside from the cut streak line with the lower pressing member, lowering the upper pressing member in a circular arc shape, pressing the outside from the cut streak line so as to become line contact parallel to the cut sripe line. CONSTITUTION: The end edge 3 to which cut streak line 2 is applied to the upper face of sheet glass 1 is protruded from the end part of a carrying conveyer 4. The glass is pressed and supported by the lower pressing member 12 positioned obliquely below the cut streak line 2 of the sheet glass 1 and pressing the end edge side parallel to the cut streak line 2 and opposed to the cut streak line 2 by the lower pressing member 12. The upper pressing member 9 is lowered in a circular arc shape by the upper lifting mechanism from obliquely upper direction of the cut streak simultaneously to press and support the lower part or with the delay of time and the upper pressing part 9 presses the end edge side from the cut streak line 2 of the sheet glass 1 so as to come into line contact parallel with the cut streak line 2 and the sheet glass is broken off from the cut streak line 2 by adding moment in the end edge direction.

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 an apparatus for cleanly breaking even a narrow ear portion.

[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 is intended for reliable splitting and cutting without abutting the splitting end surfaces of each other with a simple structure. In the method of projecting the end edge provided from the end of the conveyer and breaking and cutting the thin glass sheet along the cut line, the thin line glass is positioned diagonally below the cut line of the thin glass and the cut line is formed by the lower elevating mechanism. Parallel to the line and at the same time as the lower end pressing member on the side opposite to the ridge line at the same time as pressing support, or with a time delay,
The upper pressing member is lowered in an arc shape by an upper elevating mechanism parallel to the cutting line applied to the edge of the thin glass and diagonally above the cutting line, and the upper pressing member moves the cutting line of the thin glass as it descends. By pressing the edge side more and applying a moment in the edge direction, it cuts and cuts, so that the contact portion between the upper pressing member and the thin glass plate is in line contact parallel to the cut line, After positioning the thin glass sheet carried into the conveyor, the transport belt having the thin glass sheet adsorbed and fixed thereon is retracted, and the thin glass sheet is broken along the cut line on the rear end side, and then the transport belt is advanced to advance the thin sheet glass. In the method of breaking the thin glass plate to be broken along the cutting line on the front end side of the glass, and the device for breaking and cutting the thin glass plate along the cutting line provided to the edge of the thin glass plate, Stop transporting thin glass Conveying means consisting of the existing conveyor, and parallel to the cut line imparted to the edge of the thin glass protruding from the end of the conveyor, and located above the thin glass, by the upper elevating mechanism and the elevating mechanism. An upper pressing means composed of an upper pressing member that can move up and down in an arc shape and presses the edge side of the cut line, and is located below the cut line of the thin glass sheet, and can be moved up and down by a lower lift mechanism and the lower lift mechanism. And a lower pressing means composed of a lower pressing member that is parallel to the cutting line and presses the end edge side from the cutting line, and a cylinder and a link mechanism as a mechanism for moving the upper pressing member up and down in an arc shape. In addition, the bottom surface of the upper pressing member is an inclined surface so that the contact portion with the thin glass plate is in line contact in parallel with the cut line, and further above the lower pressing member. Times A thin glass plate comprising a brush, a motor for driving and rotating the rotating brush, and a traveling motor for moving the rotating brush along the lower pressing member, and a urethane rubber sheet is attached to the upper surface of the lower pressing member. To provide a breaking device.

[0005]

The thin glass sheet, which is positioned and fixed on the conveyor and is preliminarily provided with the score line, is moved to the crease cutting portion provided at the forward or backward end of the conveyor by the forward or backward movement of the conveyor belt. Insert the thin glass between the upper and lower pressing members, and stop the conveyor that sucks and supports the thin glass at a position where the cut line of the thin glass is near the middle of the upper and lower pressing members. Let The thin glass sheet is adsorbed and fixed by a vacuum system provided in the conveyor via a plurality of holes provided in the conveyor belt.

The upper pressing member is parallel to the scoring line applied to the edge of the thin glass plate, and the upper elevating mechanism such as a combination of a cylinder and a parallel link mechanism obliquely above the scoring line makes the upper pressing member into an arc shape. As it is lowered, the upper pressing member pushes the edge of the thin glass plate closer to the edge than the cut line and applies a moment in the edge direction.

The lower pressing member is located diagonally below the cut line of the thin glass plate, and a lower elevating mechanism such as a cylinder presses the side closer to the edge opposite to the cut line by the lower pressing member, and the upper press member is pressed. The bending moment of the member breaks and cuts along the cut line of thin glass.

The bottom surface of the upper pressing member is an inclined surface so as to make line contact with the thin glass, and the lower pressing member has an upper surface adhered with urethane resin or the like to improve the adhesion without slipping, thereby improving the adhesion of the thin glass. The inside of the scoring line can be pressed, and scratches and the like can be prevented.

[0009]

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 schematic perspective view in which a part of a thin glass breaker for explaining an embodiment of the present invention is cut away and omitted, and FIGS. 2, 3, and 4 are respectively embodiments of the present invention. FIG. 5 shows a vertical sectional view, a front view, and a plan view of AA in FIG. 3 in which a part of the description is cut out and omitted, and FIG.
FIG. 6 shows a vertical cross-sectional view in which a part of the auxiliary roll is retracted upward, which is cut out and omitted, FIG. 6 is a vertical cross-sectional view of a main part showing a split portion of the present invention, and FIG. The longitudinal cross-sectional view of an upper pressing member is shown.

As shown in FIGS. 1 to 5, the present invention is an apparatus for breaking and cutting a thin glass plate 1 along a score line 2 attached to an edge 3 of the thin glass plate 1 for conveying the thin glass plate 1. A conveying means including a conveyer 4 that can be stopped freely, and a thin glass sheet 1 that is parallel to the score line 2 provided on the edge 3 of the thin glass sheet 1 protruding from the end of the conveyer sheet 4
Located above the cut line 2 and is, for example, an upper elevating mechanism including a cylinder and a link mechanism 16, and an upper pressing member 9 that is movable up and down in an arc shape by the elevating mechanism and presses the edge 3 side from the cut line 2. Which is located below the scoring line 2 of the thin glass 1 and is vertically movable by a lower elevating mechanism and a lower elevating mechanism driven by a cylinder or the like and is parallel to the scoring line 2 and is parallel to the scoring line 2. 2 is a folding device for a thin glass sheet 1, which comprises a lower pressing means composed of a lower pressing member 12 for pressing the side opposite to the edge.

Further, as shown in FIGS. 6 and 7, from the horizontal direction, the bottom surface of the upper pressing member 9 is arranged so that the contact portion with the thin glass sheet 1 is parallel to the cut line 2 and is in line contact. An inclined surface inclined by about 3 ° to 5 ° is provided, and the rotating brush 26 and the rotating brush 26 are provided above the lower pressing member 12.
The lower pressing member 1 is composed of, for example, an air motor 27 or an electric motor that drives and rotates the rotating brush 26 and a traveling motor 34 that moves the rotating brush 26 along the lower pressing member.
An elastic body such as urethane rubber for preventing scratches and slips is attached to the upper surface of 2.

The folding device is provided in either the carry-in section or the carry-out section of the conveyor, or both. First, on the carry-in section side, the edge 3 of the thin glass sheet 1 is erected so as to straddle the conveyor 4. A plurality of upper elevating cylinders 7, 7 are axially attached to a horizontally extending portion 37 of a horizontally installed support frame 36 via brackets.
An upper pressing member 9 in the form of a long rectangular parallel to the cut line 2 provided on the edge 3 of the thin glass sheet 1 is provided at the tip of the upper pressing member 7, and the upper pressing member 9 can be moved up and down by the operation of the upper lifting cylinders 7, 7. Become.

The operation of the present invention will be described below. The thin glass sheet 1 that has been carried into the conveyor 4 and has been provided with the score lines 2 in advance is positioned by a positioning device (not shown) on the conveyor 4, and is transferred to the conveyor belt 5 by a vacuum system (not shown) provided in the conveyor 4. The thin glass plate 1 is fixed by suction through the plurality of suction holes 6 provided.

Then, a conveyor belt 5 is formed by the conveyor 4
The thin glass sheet 1 adsorbed on is moved to the break cutting section provided on the front end side or the rear end side of the conveyor 4. The movement distance is set and registered in advance in a control device (not shown) so as to stop at a position where it is stopped, and the servomotor is controlled by counting by a pulse signal from an encoder (not shown) to move the thin glass sheet 1 to the upper pressing member 9 and the lower portion. In order to accurately stop the thin glass sheet 1 between the pressing members 12 and at the position where the score line 2 of the thin glass sheet 1 is between the upper pressing member 9 and the lower pressing member 12, the conveyer conveyor 4
To stop.

At the same time when the thin glass sheet 1 stops at the set position, the auxiliary roll 14 is raised so as not to interfere with the breaking of the end portion of the thin glass sheet 1. The auxiliary roll 14
Is an auxiliary roll elevating cylinder 20, 20 mounted on brackets 39, 39 mounted on a horizontal frame 37 extending horizontally on the support frames 36, 36 standing on both sides of the conveyor 4, and the cylinders of the cylinders are supported. The rods 21 and 21 raise the auxiliary roll supporting member 22 axially attached to the tips of the cylinder rods 21 and 21, and the auxiliary roll 1 is supported by the auxiliary roll supporting members via the auxiliary roll connecting members 23 and 23.
4 is raised.

Next, the upper pressing member 9, is attached to the tip of the cylinder rods 8, 8 of the upper lifting cylinders 7, 7 which are axially attached to the horizontal portions 37, which horizontally extend on the supporting frames 36, 36 via brackets 38, 38. 9 is fixed, the upper lift cylinder 7,
The upper pressing member can be moved up and down by moving up and down 7.

On the other hand, link mechanisms 16 and 16 are provided at both end portions of a horizontal crossing portion provided in the width direction of the support frames 36 and 36 so as to straddle the conveyor 4.
6 and 16 are brackets 4 at both ends of the horizontal portions 37, 37.
The fixing members 17 and 17 are fixed via 0 and 40, and the rotating members 18 and 18 are axially attached to the tips of the two connecting members that are axially attached from the fixing members 17 and 17. When,
A pair of connecting members and the rotating members 18, 18 form a parallelogram, and one side of the fixing members 17, 17 is fixed so that the opposite sides, that is, the rotating members 18, 18 form an arc. If the rotating members 18, 18 and the upper pressing members 9, 9 are fixed, the upper pressing members 9, 9 can be moved by the operation of the upper lifting cylinders 7, 7 and the link mechanisms 16, 16. An arc can be drawn and it can descend, and as it descends, the upper pressing members 9, 9 press the side closer to the edge 3 than the cut line 2 of the thin glass sheet 1, and a moment is applied in the direction of the edge 3.

Next, the thin glass plate 1 of the upper pressing member 9
Simultaneously with the descent to the surface, the cut line 2 is drawn from below the thin glass plate 1.
The lower part of the thin glass plate 1 that is parallel to and is opposite to the edge is pressed by the lower pressing member 12 to cause cracks along the cut lines 2 of the thin glass plate 1 to break the thin glass plate 1. Lower pressing member 1
Reference numeral 2 denotes a lower pressing member 1 that is in the shape of a square bar and contacts the thin glass plate 1.
An elastic member 14 made of urethane resin or the like having a thickness of about 6 mm is adhered to the upper surface of the thin glass plate 1, and when the lower surface of the thin glass plate 1 is pressed, the adhesion is improved without slipping and the cut line 2 of the thin glass plate 1 is formed.
The inside of the can be pressed, and scratches and the like can be prevented.

The bottom surface of the upper pressing member 9 is an inclined surface so as to come into line contact with the thin glass plate 1. By making line contact, a bending moment is evenly applied to the cut line 2, so that the crease at the time of splitting can be cut cleanly.

When the breaking of the thin glass sheet 1 along the score line 2 is completed, the edge portion of the thin glass sheet 1, which is commonly called an ear, falls into a cullet box (not shown) and is recovered as a glass raw material. . After the ears of thin glass 1 drop,
In order to lower the auxiliary roll 24 retracted above the conveyance level of the thin glass plate 1 to the same level as the conveyance roll, the cylinder rods 21 and 21 of the auxiliary roll elevating cylinders 20 and 20 are extended, and the auxiliary roll support member. Two
2 is lowered, and the auxiliary roll 24 is lowered to a predetermined level via the auxiliary roll connecting members 23, 23.

When the thin glass sheet 1 is broken along the score lines 2, chips of the thin glass sheet 1 are generated at the time of breaking and adhere to the upper surface of the lower pressing member 12, and the adhesion is left as it is. If this is done, chips will be pressed against the lower surface of the thin glass sheet 1 at the time of the next breaking, and scratches will occur. Therefore, as a mechanism for removing the chips adhering to the upper surface of the lower pressing member 12, the upper surface of the lower pressing member 12 is moved and the chips are removed while rotating the rotating brush 26 as shown in FIG. . The rotating brush 26 is performed every time the folding of the edge 3 of the thin glass sheet 1 is completed.

A motor 34 for running the rotary brush is fixed to the frame 41 via an L-shaped bracket 33, and a pulley 32 is attached to the tip of the rotary shaft of the motor 34 and rotates in accordance with the rotation of the motor 34. Timing belt 3 hung so as to mesh with pulley 32
1 rotates with a pulley 32 provided on the opposite side of the conveyor 4 so as to straddle the conveyor 4.
A rail 29 is provided between the frames 41, 41,
A guide slidably traveling on the rail 29 is provided, and an L-shaped bracket 28 for attaching the air motor 27 and the timing belt 31 are fixed to the guide. L
A rotary brush 26 having a brush on the periphery thereof is attached to the tip of the shaft of an air motor 27 attached to the bracket 28, which is a mechanism for rotating by air pressure. Needless to say, an electric motor may be used instead of the air motor 27.

When the front edge or the rear edge of the thin glass sheet 1 in the conveying direction is completely broken, for example, after the rear edge is broken, the front edge is broken. After the breaking of the rear end side is completed, the thin glass sheet 1 is moved forward by the conveyor 4, and the cut line 2 at the front end portion of the thin glass sheet 1 is moved by the servomotor to the upper pressing member 9 and the lower pressing member of the front side breaking device. Stop and fix at a position that will come to the middle position of 12,
The ears are broken in the same manner as the folds on the rear end side, and after the ears are broken on the front end side, the thin glass sheet 1 is further advanced by the conveyer 4 to carry the thin glass sheet 1 to the next step.

On the contrary, when the front edge of the thin glass sheet 1 is first broken, the thin glass sheet 1 is temporarily retracted after the splitting, and the cut line of the rear edge portion of the thin glass sheet 1 is cut. When 2 comes to an intermediate position between the upper pressing member 9 and the lower pressing member 12 on the rear end side, the thin sheet glass 1 is stopped and fixed, and the ears on the rear end side are broken similarly to the front end, The thin glass plate 1 is unloaded.

Of course, only one of the front end portion and the rear end portion may be split. The auxiliary roll 24 is retracted to the upper side by the auxiliary roll elevating cylinders 20 and 20 at the time of breaking, but a cylinder is provided at the lower side of the transport conveyor 4 to perform the breaking operation at the time of breaking the ears of the thin glass sheet 1. You may make it evacuate further downward so that it may not get in the way and it may not get in the way of falling into the collection box of the ear part.

If a feed mechanism and a positioning means are provided on a table provided with an automatic cutting machine for giving the scoring lines 2, and a folding device is provided at the end of the table, a series of flow mechanism lines are formed.
A more efficient cutting operation can be performed, and it is desirable that the upper lifting cylinders 7, 7 and the lower lifting cylinders 11, 11 have a speed control.

Even when the scoring lines 2 are provided on the four sides of the edge 3 of the thin glass sheet 1, two sets of this device are prepared,
Needless to say, if the direction of the thin glass plate 1 is changed between the devices, the ears on the four sides of the thin glass plate 1 can be automatically broken.

The thin glass 1 has a thickness of 0.5 mm.
The result was obtained for the purpose of a clean cut with an ultra thin sheet glass of 1.1 mm to a folding edge of a right angle, but of course, a sheet having a thickness of 3.3 mm or less can also be used, and a thickness of 0.
Of course, even if it was 5 mm or less, the desired result could be obtained.

[0030]

Industrial Applicability According to the present invention, the optimum bending force for breaking the thin glass sheet is cut in the direction in which the upper pressing means descends in a circular arc by the link mechanism and separates the thin glass sheet cutting surfaces from each other. The cut surfaces of the glass members do not collide with each other, a clean cut can be obtained, and a device with a simple structure enables a narrow edge to be folded, thereby improving the production yield. Further, by providing a chip removing means such as a rotary brush on the upper part of the lower pressing member, even if chips adhere to the upper surface of the lower pressing member, they can be easily removed and scratches on the thin glass sheet can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic perspective view in which a part of a thin glass breaker for explaining an embodiment of the present invention is cut away and omitted.

FIG. 2 is a vertical cross-sectional view in which a part is cut away and an illustration is made to explain an embodiment of the present invention, and shows a vertical cross section taken along line AA of FIG.

FIG. 3 is a front view in which a part is cut away and omitted for explaining an embodiment of the present invention.

FIG. 4 is a plan view in which a part is cut out and omitted for explaining an embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view showing a state in which the auxiliary roll is retracted upward during the folding operation of the thin glass sheet, with a part of which is cut away and omitted.

FIG. 6 is a vertical cross-sectional view of a main part showing a split part of the present invention.

FIG. 7 shows a vertical cross-sectional view of an upper pressing member with an inclined bottom surface according to the present invention.

[Explanation of symbols]

 1 Thin Glass 2 Cut Line 3 Edge 4 Conveyor 7 Upper Lifting Cylinder 9 Upper Pushing Member 11 Lower Lifting Cylinder 12 Lower Pushing Member 13 Lower Lifting Guide 16 Link Mechanism

Claims (8)

[Claims] Claim: What is claimed is: 1. A method for cutting an edge of thin glass by breaking the edge of the thin glass by projecting an end edge of the thin glass which has a scoring line from the end of the conveyer. It is located diagonally below the line, parallel to the cut line by the lower elevating mechanism, and the end edge side of the cut line is attached to the edge of the thin glass plate at the same time as the lower pressure member is pressed and supported, or with a time delay. The upper pressing member is lowered in an arc shape by an upper elevating mechanism parallel to the cut line and diagonally above the cut line, and the upper pressing member presses the edge side of the cut line of the thin glass sheet as it descends. At the same time, a breaking method for thin glass is characterized by breaking and cutting by applying a moment in the edge direction. 2. The method of breaking a thin glass sheet according to claim 1, wherein a contact portion between the upper pressing member and the thin glass sheet is in line contact with the score line in parallel. 3. After positioning the thin glass sheet carried into the conveyor, the conveying belt having the thin glass sheet adsorbed and fixed thereon is retracted to break the thin glass sheet along the cut line on the rear end side of the thin glass sheet, and then to convey the thin glass sheet. 3. The method of breaking a thin glass sheet according to claim 1, wherein the belt is moved forward to break the thin glass sheet along a score line on the front end side thereof. 4. An apparatus for breaking and cutting thin glass along a scoring line applied to an edge of the thin glass, the conveying means comprising a conveyer for freely stopping the conveyance of the thin glass, and the end of the conveyer. It is located parallel to the cut line given to the edge of the thin glass plate protruding from the section and above the thin glass, and can be moved up and down in an arc shape by the upper elevating mechanism and the elevating mechanism and presses the edge side from the cut line. An upper pressing means composed of an upper pressing member, and a lower elevating mechanism and a lower elevating mechanism which can be moved up and down parallel to the cutting line and at an end opposite to the cutting line. A lower sheet pressing device including a lower sheet pressing member that presses the edge side, and a thin glass breaking device. 5. The apparatus for breaking thin glass according to claim 4, wherein the mechanism for moving the upper pressing member up and down in an arc shape is a combination of a cylinder and a link mechanism. 6. The thin glass sheet according to claim 4, wherein the bottom surface of the upper pressing member is an inclined surface so that the contact portion with the thin glass sheet is in parallel line contact with the cut line. Splitting device. 7. A rotating brush, a motor for driving and rotating the rotating brush, and a traveling motor for moving the rotating brush along the lower pressing member above the lower pressing member. 4. A thin glass breaker according to any one of 4 to 6. 8. The thin glass breaker according to claim 4, wherein a urethane rubber sheet is attached to the upper surface of the lower pressing member.