JP2017190255A - Production method and production device of plate glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production method and a production device of a plate glass, which breaks a material glass (plate glass) along a scribe line, the material glass having a scribe line on a first face, and being placed on a protection sheet so that a second main face opposite to the first face contacts the protection sheet, in which glass powder etc. generated when breaking the plate glass, is stably suctioned and removed, without sucking and rolling in a part of the protection sheet.SOLUTION: The plate glass G is broken by pressing the second main face Gb along the scribe line L via the protection sheet S by a folding and breaking mechanism 10, while the glass powder generated when the plate glass G is broken is dust collected from the first main face side by a dust collection mechanism 30, and in the dust collection mechanism 30, two kinds of driving odes of a dust collecting ode having a specified sucking force for collecting the glass powder, and a stand-by mode having a relatively weaker sucking force than the specified sucking force.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a technique for manufacturing a plate glass and a manufacturing apparatus, and more particularly to a technique for sucking and removing glass powder and the like generated when cleaving a plate glass.

In recent years, a plate glass used for a flat panel display such as a liquid crystal display device or an organic EL display device is a plate glass having a relatively large outer size (hereinafter, referred to as “material glass” as appropriate) for reasons such as cost reduction. It is produced by cleaving to the outer size.
Here, as a method of cleaving the material glass, conventionally, a dividing line (scribe line) is formed in advance on one main surface of the material glass, and the material glass is folded by pressing along the scribe line. I was splitting.
However, such a cleaving method has a problem that scratches are easily formed on the main surface of the material glass due to glass powder or the like generated when the material glass is broken along the scribe line.

Therefore, for example, “Patent Document 1” discloses a technique for solving such a problem.
Specifically, the "Patent Document 1" includes a glass powder that is provided in a substrate cutting apparatus that cuts a glass substrate (material glass) along a cutting line (scribe line) and removes glass powder generated at the time of cutting. The suction device is arranged along the scribe line, is connected to the vacuum suction means and sucks the glass powder, and is arranged on both outer sides of the suction portion so as to be symmetrical about the scribe line. And a pair of blow-out portions that are connected to the gas supply means and blow up the glass powder toward the suction portion by the supply gas blown onto the material glass. Is disclosed.

JP 2008-94690 A

  By providing a glass powder removing device as shown in the “Patent Document 1”, it is possible to effectively suck and remove the glass powder generated when the material glass is broken along the scribe line. Thus, it is possible to prevent the main surface of the material glass from being scratched and improve the quality of the plate glass finally produced as a product.

However, for example, in the case of a material glass previously placed on a protective sheet for preventing scratches, the protective sheet usually has a larger area than the material glass, and the protective sheet protrudes from the periphery of the material glass. It is in the state.
In such a case, for example, when the material glass folding operation is completed and the removal device is retracted from the material glass, a part of the protective sheet protruding from the surroundings of the material glass may be sucked by the removal device. is there.
As a result, a part of the protective sheet is caught in the removing device, and troubles are induced in the entire manufacturing device, which may make it difficult to improve the quality of the plate glass finally produced as a product.

  The present invention has been made in view of the above-described problems of the present situation, and has a scribe line on the first main surface, and the second main surface opposite to the first main surface is a protective sheet. A method for producing a plate glass, in which a material glass (plate glass) placed on the protective sheet so as to come into contact is cleaved along the scribe line, wherein the plate glass is drawn in without sucking in a part of the protective sheet. It is an object of the present invention to provide a glass sheet manufacturing method and a manufacturing apparatus capable of stably sucking and removing glass powder and the like generated when cleaving glass.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, the plate glass manufacturing method according to the present invention has a scribe line on the first main surface, and the second main surface opposite to the first main surface is in contact with the protective sheet on the protective sheet. A method for producing a plate glass that breaks the plate glass placed on the scribe line, wherein the second main surface is pressed along the scribe line through the protective sheet by a folding means. In this way, the glass sheet is cleaved and the glass powder generated when the glass sheet is cleaved is collected from the first main surface side by the dust collecting means, and the dust collecting means collects the glass powder. Two kinds of operation modes consisting of a dust collection mode having a predetermined suction force and a standby mode having a suction force relatively weaker than the predetermined suction force can be selected. .

According to the manufacturing method of the plate glass having such a configuration, the glass powder generated when the plate glass is cut by setting the operation mode of the dust collecting means to the dust collection mode only when the plate glass is broken. Can be stably sucked and removed, while the operation mode of the dust collecting means is always set to the standby mode except for the folding work, thereby preventing a part of the protective sheet from being sucked and caught. In addition, the glass powder remaining in the nozzle can be prevented from adhering to the plate glass by dropping.
As a result, it is possible to improve the quality of the plate glass finally produced as a product without inducing trouble as a whole plate glass manufacturing apparatus.

  Further, in the method for manufacturing a glass sheet according to the present invention, the dust collecting means includes a nozzle that serves as a suction port for the glass powder, a piping member that communicates with the nozzle, and a shutter plate that adjusts an opening area of the piping member. Are preferably provided.

  By having such a configuration, in order to be able to select the operation mode of the dust collecting means, for example, it is not necessary to separately provide a large operation mode switching device, and it can be realized by a simple mechanism using a shutter plate. Is.

  Further, in the method for manufacturing a glass sheet according to the present invention, the shutter plate is formed with a large cutout hole and a small cutout hole having a shape obtained by reducing the diameter of the large cutout hole, and the shutter plate is By moving the large cutout hole to the end of the piping member, the dust collecting means is set to the dust collection mode, while the shutter plate moves the small cutout hole to the end of the piping member. By doing so, it is preferable that the dust collecting means is set to the standby mode.

  Thus, in the present invention, a shutter plate having a large cutout hole and a small cutout hole is movably provided, and the operation mode switching mechanism of the dust collecting means is configured by changing the position of the shutter plate. Therefore, it is economical without requiring a complicated operation program for switching control of the operation mode.

  Moreover, in the manufacturing method of the plate glass which concerns on this invention, it is preferable that the internal diameter of the said small notch hole is 1/4 or more and 1/3 or less with respect to the internal diameter of the said large notch hole.

  By having such a configuration, when the operation mode of the dust collecting means is switched to the standby mode, a part of the protective sheet is not sucked and wound, but glass powder temporarily stored in the header tank, etc. The suction pressure of the dust collecting means can be effectively suppressed to the extent that does not fall off from the nozzle.

  Further, in the method for manufacturing a glass sheet according to the present invention, the dust collecting means has a header tank to which the piping member is connected, and a dust collector to be connected to the header tank, and the header tank has an opening / closing function. Preferably, the damper is connected, the damper is closed in the dust collection mode, and the damper is open in the standby mode.

  By having such a configuration, for example, when the operation mode of the dust collecting means is switched to the standby mode, the inside of the header tank whose negative pressure is suddenly increased by the suction force of the dust collector is opened by the damper, The negative pressure in the header tank can be suppressed to a predetermined pressure.

  Further, the sheet glass manufacturing apparatus according to the present invention has a scribe line on the first main surface, and the second main surface opposite to the first main surface is in contact with the protective sheet on the protective sheet. Is a plate glass manufacturing apparatus that cleaves the plate glass placed on the scribe line, by pressing the second main surface along the scribe line through the protective sheet, A cleaving means for cleaving, and a dust collecting means for collecting the glass powder generated when cleaving the plate glass from the first main surface side, wherein the dust collecting means collects the glass powder. Two kinds of operation modes consisting of a dust collection mode having a predetermined suction force and a standby mode having a suction force relatively weaker than the predetermined suction force can be selected. .

According to the plate glass manufacturing apparatus having such a configuration, the glass powder generated when the plate glass is cut by setting the operation mode of the dust collecting means to the dust collection mode only when the plate glass is folded. Can be stably sucked and removed, while the operation mode of the dust collecting means is always set to the standby mode except for the folding work, thereby preventing a part of the protective sheet from being sucked and caught. In addition, the glass powder remaining in the nozzle can be prevented from adhering to the plate glass by dropping.
As a result, it is possible to improve the quality of the plate glass finally produced as a product without inducing trouble as a whole plate glass manufacturing apparatus.

  In the plate glass manufacturing apparatus according to the present invention, the dust collecting means includes a nozzle that serves as a suction port for the glass powder, a piping member that communicates with the nozzle, and a shutter plate that adjusts an opening area of the piping member. Are preferably provided.

  By having such a configuration, in order to be able to select the operation mode of the dust collecting means, for example, it is not necessary to separately provide a large operation mode switching device, and it can be realized by a simple mechanism using a shutter plate. Is.

  Further, in the plate glass manufacturing apparatus according to the present invention, the shutter plate is formed with a large cutout hole and a small cutout hole having a reduced diameter of the large cutout hole, and the shutter plate is By moving the large cutout hole to the end of the piping member, the dust collecting means is set to the dust collection mode, while the shutter plate moves the small cutout hole to the end of the piping member. By doing so, it is preferable that the dust collecting means is set to the standby mode.

  Thus, in the present invention, a shutter plate having a large cutout hole and a small cutout hole is movably provided, and the operation mode switching mechanism of the dust collecting means is configured by changing the position of the shutter plate. Therefore, it is economical without requiring a complicated operation program for switching control of the operation mode.

  Moreover, the plate glass manufacturing apparatus which concerns on this invention WHEREIN: It is preferable that the internal diameter of the said small notch hole is 1/4 or more and 1/3 or less with respect to the internal diameter of the said large notch hole.

  By having such a configuration, when the operation mode of the dust collecting means is switched to the standby mode, a part of the protective sheet is not sucked and wound, but glass powder temporarily stored in the header tank, etc. The suction pressure of the dust collecting means can be effectively suppressed to the extent that does not fall off from the nozzle.

  In the plate glass manufacturing apparatus according to the present invention, the dust collecting means includes a header tank to which the piping member is connected and a dust collector to be connected to the header tank, and the header tank has an opening / closing function. Preferably, the damper is connected, the damper is closed in the dust collection mode, and the damper is open in the standby mode.

  By having such a configuration, for example, when the operation mode of the dust collecting means is switched to the standby mode, the inside of the header tank whose negative pressure is suddenly increased by the suction force of the dust collector is opened by the damper, The negative pressure in the header tank can be suppressed to a predetermined pressure.

As effects of the present invention, the following effects can be obtained.
That is, according to the manufacturing method and the manufacturing apparatus of the plate glass according to the present invention, it is possible to stably suck and remove the glass powder and the like generated when the plate glass is cut without sucking and winding a part of the protective sheet. Can do.

The schematic diagram which showed the whole structure of the manufacturing apparatus of the plate glass which concerns on one Embodiment of this invention. It is the figure which showed the whole structure of the dust collection mechanism part, Comprising: The schematic diagram seen from the direction of arrow B in FIG. FIG. 3 is a view of the inside of the nozzle body of the dust collection mechanism viewed from the direction of arrow C in FIG. 2, wherein (a) is a cross-sectional view showing a state in the “dust collection mode”, and (b) is “standby” Sectional drawing which showed the state at the time of mode. It is the figure which showed the state of the manufacturing apparatus at the time of performing a cleaving operation, Comprising: (a) is the schematic diagram which showed the state immediately after the plate glass to be cleaved was thrown in, (b) is plate glass by a press member. (C) is a schematic diagram showing a state immediately after the sheet glass is broken by the folding member, (d) is a return of the folding member to the original predetermined position. The schematic diagram which showed the state immediately after having performed, (e) is the schematic diagram which showed the state by which a part of plate glass was lifted by the suction pad. It is the figure which showed the inside of the nozzle main body in the dust collection mechanism part of another embodiment, Comprising: (a) is sectional drawing which showed the state at the time of "dust collection mode", (b) shows the state at the time of "standby mode" FIG. It is the figure which showed the inside of the nozzle main body in the dust collection mechanism part of other another embodiment, (a) is sectional drawing which showed the state at the time of "dust collection mode", (b) is at the time of "standby mode" Sectional drawing which showed the state.

Next, an embodiment for embodying the present invention will be described with reference to FIGS. 1 to 4.
In the following description, for convenience, the vertical direction of FIGS. 1, 2 and 4 is described as the vertical direction of the sheet glass manufacturing apparatus 1.
Moreover, in FIG. 1 and FIG. 4, the direction of the arrow A is described as the conveying direction of the glass sheet G.

[Manufacturing equipment 1]
First, the configuration of a sheet glass manufacturing apparatus 1 (hereinafter simply referred to as “manufacturing apparatus 1”) in the present embodiment will be described with reference to FIG.

  The manufacturing apparatus 1 is an apparatus for producing a plate glass used for a flat panel display such as a liquid crystal display device or an organic EL display device, and cleaves a plate glass G having a relatively large outer size into a predetermined outer size. It is a device for.

  Here, the plate glass G put into the manufacturing apparatus 1 is placed on the protective sheet S for preventing scratches, and the protective sheet S has a larger area than the plate glass G. The protective sheet S is in a state of protruding from the surroundings.

The plate glass G includes a first main surface Ga (in this embodiment, an upper plane) and a second main surface Gb (in this embodiment, a lower plane) located on the opposite side of the first main surface Ga. And a scribe line L formed of a groove extending linearly is formed on the first main surface Ga.
Further, the plate glass G is placed on the protective sheet S such that the second main surface Gb is in contact with the protective sheet S.
In this way, the plate glass G is thrown into the manufacturing apparatus 1 and arranged in a horizontal posture with the first main surface Ga facing upward.

  The manufacturing apparatus 1 mainly includes a folding mechanism unit 10, a presser mechanism unit 20, a dust collection mechanism unit 30, an adsorption mechanism unit 40, and the like.

The folding mechanism part 10 is provided as a folding means for cutting the sheet glass G by pressing the second main surface Gb while pushing it up from below through the protective sheet S.
The folding mechanism unit 10 includes, for example, a folding bar 11 made of a substantially strip-shaped member, and a first lifting device (not shown) that moves the folding bar 11 up and down.

  The folding bar 11 is disposed so as to extend in the horizontal direction and in the direction orthogonal to the transport direction, with the plane portion facing the transport direction of the glass sheet G (the direction of arrow A in FIG. 1).

For example, as will be described later, when the glass sheet G is put into a predetermined position in the manufacturing apparatus 1, the folding bar 11 is raised by the first lifting device.
Thereby, the thrown plate glass G is pushed up from below by the folding bar 11.
As a result, the sheet glass G is pressed by the second bar Gb along the scribe line L by the folding bar 11 and is cut.

Next, the presser mechanism portion 20 will be described.
The presser mechanism portion 20 is provided as a holding means for pressing the first main surface Ga of the plate glass G from above and holding the posture of the plate glass G pushed up by the folding bar 11 together with the suction mechanism portion 40 described later. Is.
The presser mechanism 20 includes a linear channel brush 21 and a second lifting device 22 that lifts and lowers the channel brush 21.

The channel brush 21 is arranged on the upper side with respect to the folding bar 11 and on the upstream side in the transport direction so as to extend in the horizontal direction and the direction orthogonal to the transport direction while directing the brush 21a downward. .
That is, the channel brush 21 is arranged in parallel with the folding bar 11 in the vertical direction with the sheet glass G put in a predetermined position in the manufacturing apparatus 1 interposed therebetween as viewed from the transport direction.

And the channel brush 21 will be lowered | hung by the 2nd raising / lowering apparatus 22, if the plate glass G is thrown into the predetermined position in the manufacturing apparatus 1, for example so that it may mention later.
Thereby, the introduced glass sheet G is pressed from above by the channel brush 21.

  As a result, the glass sheet G is pressed by the channel brush 21 in the vicinity of the scribe line L on the first main surface Ga (specifically, the upstream side in the transport direction of the scribe line L), and the posture is maintained.

Next, the dust collection mechanism unit 30 will be described.
The dust collecting mechanism 30 is provided as a dust collecting means for collecting glass powder generated on the sheet glass G from the first main surface Ga side when pressed by the channel brush 21 and when cleaved by the folding bar 11. It is what
Although the details will be described later, the dust collection mechanism unit 30 includes a nozzle 31 extending in one direction, and the nozzle 31 is supported by the channel brush 21 via a bracket 32.
Thereby, the nozzle 31 follows the raising / lowering operation | movement of the channel brush 21 by the 2nd raising / lowering apparatus 22. FIG.

Next, the suction mechanism unit 40 will be described.
The suction mechanism unit 40 presses the first main surface Ga of the plate glass G from above, and maintains the posture of the plate glass G pushed up by the folding bar 11 together with the presser mechanism unit 20 described above. A part of the glass sheet G is adsorbed and transported to a predetermined place (for example, a discharge conveyor for discharging a part of the glass sheet G to the outside of the cleaving apparatus 1).
The suction mechanism unit 40 includes a plurality of suction pads 41, 41,... Arranged in the horizontal direction, a vacuum circuit (not shown) that controls the suction operation of these suction pads 41, 41, and the like. It is comprised by the 3rd raising / lowering apparatus (not shown) which raises / lowers pad 41 * 41 ..., the moving apparatus (not shown) etc. which move the said suction pad 41 * 41 ... to a predetermined place. .

  The plurality of suction pads 41..., The plate glass G put into a predetermined position in the cleaving apparatus 1 when viewed from the conveyance direction on the upper side with respect to the folding bar 11 and downstream in the conveyance direction. It is arranged in parallel with the folding bar 11 in the vertical direction with a gap in between.

The plurality of suction pads 41, 41,... Having such a configuration are lowered by the third lifting device when the glass sheet G is put into a predetermined position in the cleaving device 1, as will be described later, for example. The
Thereby, the supplied glass sheet G is pressed from above by the plurality of suction pads 41.

  As a result, the glass sheet G is pressed near the scribe line L on the first main surface Ga (specifically, the downstream side in the transport direction of the scribe line L) by the plurality of suction pads 41. Hold the posture.

In addition, the plurality of suction pads 41, 41... Press the plate glass G, and at the same time, a part of the plate glass G (downstream in the conveying direction of the scribe line L) through the vacuum circuit (not shown). Is configured to adsorb.
Then, as will be described later, after the sheet glass G is cut, a part of the sheet glass G (downstream in the transport direction of the scribe line L) is immediately discharged to a predetermined place (discharge) via the moving device (not shown). Conveyor etc.).

[Dust collection mechanism 30]
Next, the configuration of the dust collection mechanism 30 will be described in detail with reference to FIGS. 1 to 3.

  As shown in FIG. 2, the dust collection mechanism 30 is mainly composed of a nozzle 31, a duct pipe 33, a header tank 34, a duct hose 35, a dust collector 36, a damper 37, a shutter plate 38, and the like.

The nozzle 31 constitutes a suction port for sucking glass powder or the like generated in the plate glass G.
The nozzle 31 includes, for example, a rectangular box-shaped nozzle body 31A extending in one direction, and a nozzle port 31B is connected to one side surface of the nozzle body 31A.

The nozzle port 31B is configured to extend in one direction along the nozzle body 31A.
The configuration of the nozzle port 31B is not limited to the present embodiment. For example, a plurality of narrow nozzle ports may be arranged in a line along the extending direction of the nozzle body 31A.

As shown in FIG. 1, the nozzle body 31 </ b> A has a horizontal direction and a conveyance direction with the nozzle port 31 </ b> B facing downward on the upper side of the folding bar 11 and the downstream side in the conveyance direction with respect to the channel brush 21. They are arranged so as to extend in the orthogonal direction.
That is, the nozzle body 31 </ b> A is arranged such that the tip of the nozzle port 31 </ b> B is positioned above the scribe line L in the first main surface Ga of the plate glass G.

On the other hand, as shown in FIG. 2, a plurality of (four in this embodiment) duct pipes 33, 33. .. are connected to each other via the lower end.
In other words, in the nozzle 31, a plurality of duct pipes 33, 33... That are examples of piping members are communicated with the other side surface of the nozzle body 31 </ b> A.

  The nozzle body 31A communicates with a header tank 34 described later via these duct pipes 33, 33.

Here, the duct pipes 33, 33... Are provided with shutter plates 38 that can adjust the opening area and switch the flow rate of the air flowing in the duct pipes 33, 33. For example, in this embodiment, it is inserted inside the nozzle body 31A.
The location where the shutter plate 38 is provided is not limited to the present embodiment, and may be provided directly at the end of each duct tube 33 outside the nozzle body 31A, for example.

  For example, as shown in FIG. 3, the shutter plate 38 is configured by a belt-like flat plate member, and a plurality of large cutout holes 38 </ b> A, 38 </ b> A... And the large cutout holes 38 </ b> A, 38 </ b> A,. .. Are formed alternately and in a row.

More specifically, these large cutout holes 38A, 38A... And small cutout holes 38B, 38B... Are a set of one large cutout hole 38A and one small cutout hole 38B. .., At least as many as the number of duct pipes 33, 33... (Four sets in this embodiment).
In addition, the plurality of sets (four sets) of the large cutout holes 38A, 38A,... And the small cutout holes 38B, 38B,. Are arranged with the same spacing as each other.

  As shown in FIG. 2, the shutter plate 38 having such a shape is arranged along the extending direction of the nozzle main body 31A in the nozzle main body 31A while conforming to the upper surface of the nozzle main body 31A. In addition, it is slidable in the extending direction by an actuator (not shown).

  In the nozzle body 31A, the position of the shutter plate 38 is changed by the actuator or the like, so that the state of the dust collection mechanism 30 collects glass powder by exhibiting a predetermined suction force. The operation mode is switched to one of two types of operation modes including a “dust mode” and a “standby mode” having a relatively weak suction force compared to the predetermined suction force.

Specifically, as shown in FIG. 3 (a), the shutter plate 38 moves so that a plurality of large notches 38A, 38A,... Are located at the ends of the duct pipes 33, 33,. As a result, the dust collection mechanism 30 is in the “dust collection mode” state.
On the other hand, as shown in FIG. 3 (b), the shutter plate 38 is moved so that the plurality of small notches 38B, 38B,... Are located at the ends of the duct pipes 33, 33,. As a result, the dust collection mechanism 30 is in the “standby mode” state.

  As described above, in this embodiment, by moving the shutter plate 38, the flow rate of the air flowing in each duct pipe 33 is switched, and the state of the dust collecting mechanism portion 30 exhibits a predetermined suction force. The operation mode can be selected from two types of operation modes including a “dust mode” and a “standby mode” that has a lower suction than the “dust collection mode”.

The inner diameter of the large cutout hole 38A is preferably set to be approximately the same as the inner diameter of the duct pipe 33. For example, in this embodiment, it is set to about 100 [mm].
On the other hand, the inner diameter of the small cutout hole 38B is set to about 30 [mm] in the present embodiment, for example, so that the suction pressure of the dust collecting mechanism 30 can be effectively suppressed, as will be described later. Has been.

Thus, the inner diameter of the small notch hole 38B is preferably set to be about 1/3 to 1/4 with respect to the inner diameter of the large notch hole 38A.
Thereby, for example, when the operation mode of the dust collecting mechanism section 30 is switched to the “standby mode”, a part of the protective sheet S is not sucked in but is temporarily caught in the header tank 34 as described later. The suction pressure of the dust collecting mechanism 30 can be effectively suppressed to such an extent that the stored glass powder or the like does not fall down from the nozzle port 31B.

By the way, the configuration of the shutter plate 38 is not limited to that of the present embodiment.
For example, as shown in FIG. 5, as another embodiment, a shutter plate 138 in which one type of rectangular cutout holes 138 </ b> A, 138 </ b> A... Are formed by the number of duct pipes 33. You may comprise.
In this case, as shown in FIG. 5A, the shutter plate 138 is moved so that the plurality of cutout holes 138A, 138A,... Are located at the ends of the duct pipes 33, 33,. As a result, the dust collection mechanism unit 130 enters the “dust collection mode” state.
On the other hand, as shown in FIG. 5B, the shutter plate 138 is moved to a position where the plurality of cutout holes 138A, 138A,. The dust collecting mechanism unit 130 is in the “standby mode”.

Further, for example, as shown in FIG. 6, as another embodiment, the shutter plate 238 may be configured with a pair of large notch holes 238A and small notch holes 238B. The shutter plates 238, 238,... Are provided as many as the duct pipes 33, 33,.
As shown in FIG. 6 (a), the shutter plates 238, 238,... Are arranged such that the plurality of large notches 238A, 238A,. By switching each of the positions, the dust collection mechanism 230 is in the “dust collection mode” state.
On the other hand, as shown in FIG. 6 (b), the shutter plates 238, 238,... Are arranged so that the plurality of small notches 238B, 238B,. By switching each of the positions, the dust collecting mechanism 230 is in a “standby mode” state.

Next, the header tank 34 will be described.
The header tank 34 is for temporarily storing glass powder or the like generated on the plate glass G sucked through the nozzle 31.
As shown in FIG. 2, the header tank 34 is configured, for example, in a rectangular box shape extending in one direction, and is disposed immediately above the nozzle 31 and in parallel with the nozzle body 31 </ b> A.

.. Are connected to one side surface of the header tank 34 (the lower surface in the present embodiment) at the upper end.
Thereby, the header tank 34 communicates with the nozzle 31 via these duct pipes 33, 33.

On the other hand, two duct hoses 35 and 35 are connected to the other side surface of the header tank 34 (the side surface opposite to the duct pipe 33 side, that is, the upper surface) via the lower end portions.
The header tank 34 communicates with a dust collector 36 and a damper 37, which will be described later, through these duct hoses 35 and 35, respectively.

Next, the dust collector 36 will be described.
The dust collector 36 is a device that exhibits the dust collection function of the dust collection mechanism 30.
The dust collector 36 is configured by, for example, a commercially available dust collector, and communicates with the header tank 34 via a duct hose 35 that is an example of a piping member.

For example, as long as the manufacturing apparatus 1 (see FIG. 1) is in an operating state, the dust collector 36 is always in a suction state, and the glass powder sucked from the nozzle 31 is a duct pipe 33, a header tank 35, a duct. It flows with the hose 35 and is finally sucked into the dust collector 36.
Thus, the dust collection function of the dust collection mechanism 30 is exhibited.

Next, the damper 37 will be described.
In the damper 37, the operation mode of the dust collecting mechanism 30 is set to the “standby mode”, the inside of the header tank 34 in which the negative pressure is suddenly increased by the suction force of the dust collector 36 is opened, and the negative pressure in the header tank 34 is reduced. It is for suppressing to a predetermined pressure.

The damper 37 includes, for example, a rectangular box-shaped damper main body 37A, and an open / close valve 37B provided continuously to one side surface (lower surface in the present embodiment) of the damper main body 37A.
Further, the upper end portion of the duct hose 35 is connected to the opening / closing valve 37B.
Accordingly, the damper 37 has an opening / closing function by the opening / closing valve 37 </ b> B, and is communicated with the header tank 34 via the duct hose 35.

  A cylindrical opening 37A1 is formed on the other side surface (upper surface in the present embodiment) of the damper main body 37A, and a commercially available silencer (not shown) is provided in the cylindrical opening 37A1. It is inserted.

In the damper 37 having such a configuration, when the operation mode of the dust collection mechanism unit 30 is in the “dust collection mode”, the opening / closing valve 37B is in a “closed” state, and the inside of the damper main body 37A is in a state of being in the cylindrical opening 37A1. It is in a closed state with respect to the outside (closed state).
Thereby, although the negative pressure is increased inside the header tank 34 by the suction force of the dust collector 36, the cross-sectional shape of the lower ends of the plurality of duct pipes 33, 33... Is not reduced by the shutter plate 38. .
As a result, the flow rate of the air flowing into the duct pipes 33, 33... Is not reduced, and the negative pressure in the header tank 34 is maintained at a predetermined pressure.

On the other hand, when the operation mode of the dust collection mechanism 30 is in the “standby mode”, the opening / closing valve 37B is in the “open” state, and the damper main body 37A is opened to the outside via the cylindrical opening 37A1 ( Open state).
Thereby, even if the sectional shape of the lower ends of the plurality of duct pipes 33, 33... Is reduced by the shutter plate 38 and the negative pressure in the header tank 34 is rapidly increased, the cylindrical opening 37A1. By taking outside air into the damper 37 through the negative pressure, the negative pressure in the header tank 34 can be suppressed to a predetermined pressure.

[Operation procedure]
Next, the operation procedure of the manufacturing apparatus 1 will be described with reference to FIG.
First, in the folding mechanism unit 10, the folding bar 11 is stopped at the lowermost “downward standby position”, and is buried in the conveyance level Lv at which the glass sheet G is conveyed. Yes.

  Further, in the presser mechanism portion 20, the channel brush 21 is stopped at the upper limit “upper standby position”, and is separated upwardly to be larger than the thickness of the plate glass G with respect to the conveyance level Lv at which the plate glass G is conveyed. It has become a state.

In the dust collecting mechanism 30, the nozzle 31 is stopped at the “upper standby position” together with the channel brush 21.
At this time, the shutter plate 38 of the nozzle 31 is in the “standby mode”, and the suction pressure of the dust collecting mechanism 30 is suppressed.
The opening / closing valve 37B (see FIG. 2) of the damper 37 is in an “open” state, and the inside of the header tank 34 is open to the outside through the damper main body 37A.

  Further, in the suction mechanism unit 40, the suction pad 41 is stopped at the uppermost “upper standby position”, and is greatly above the thickness of the plate glass G with respect to the transport level Lv at which the plate glass G is transported. It is in a separated state.

The plate glass G is thrown into the manufacturing apparatus 1 having such a state.
The thrown plate glass G is conveyed to a predetermined position in the manufacturing apparatus 1, and as shown in FIG. 4A, between the folding mechanism unit 10, the presser mechanism unit 20 and the suction mechanism unit 40, With the first main surface Ga as the upper surface, the scribe line L (see FIG. 1) stops along the folding bar 11 in plan view.

When the plate glass G stops, the channel brush 21 starts to descend.
In addition, the suction pad 41 starts to descend together with the channel brush 21.

Then, as shown in FIG. 4B, the channel brush 21 is bent upstream of the first main surface Ga of the glass sheet G (more specifically, in the conveying direction with respect to the folding bar 11) while bending the brush 21a. This is a region on the side, and abuts with a necessary part to be a product).
In addition, the suction pad 41 also abuts the first main surface Ga of the glass sheet G (more specifically, an area on the downstream side in the transport direction with respect to the folding bar 11 and is discarded) at the lower end thereof.
Thereby, the plate glass G is pressed from above by the channel brush 21 and the suction pad 41, and the posture at a predetermined position in the manufacturing apparatus 1 is maintained.

  The suction pad 41 starts the suction operation immediately after coming into contact with the plate glass G, and presses the plate glass G while sucking the downstream side in the transport direction of the plate glass G.

  On the other hand, the nozzle 31 also descends as the channel brush 21 descends. At this time, the shutter plate 38 of the nozzle 31 is still held in the “standby mode” state, and the suction pressure of the dust collecting mechanism 30 is suppressed. It has become a state.

Then, when the channel brush 21 comes into contact with the plate glass G and stops, the shutter plate 38 of the nozzle 31 is immediately switched to the “dust collection mode” state, and the dust collection mechanism unit 30 exhibits a predetermined suction pressure.
At the same time, the opening / closing valve 37B of the damper 37 is switched to the “closed” state, and the inside of the header tank 34 is closed to the outside through the damper main body 37A.

When the posture of the glass sheet G is held by the channel brush 21 and the suction pad 41, the folding bar 11 starts to rise.
And the folding bar 11 pushes up the 2nd main surface Gb from below, pressing the plate glass G along the scribe line L (refer FIG. 1).
Thereby, as shown in FIG.4 (c), the plate glass G is bent, curving convexly toward the 1st main surface Ga side in which the said scribe line L is formed centering | focusing on the scribe line L. FIG. .

Moreover, the glass powder etc. which are generated when the plate glass G is broken are sucked by the dust collecting mechanism 30 and sufficiently removed.
As described above, the protective sheet S is provided on the lower surface of the plate glass G, and a part of the protective sheet is exposed to the vicinity of the nozzle 31 of the dust collecting mechanism 30, but the channel brush 21. Further, since the suction pad 41 is pressed from above through the plate glass G, a part of the protective sheet S is not sucked into the nozzle 31 of the dust collecting mechanism 30.

When the folding of the glass sheet G is finished, the folding bar 11 stops rising and then starts to descend.
Then, as shown in FIG. 4D, when the folding bar 11 reaches the “downward standby position” again, the folding bar 11 stops descending.

When the folding bar 11 stops at the “downward standby position”, the shutter plate 38 of the nozzle 31 is immediately switched to the “standby mode” state, and the suction pressure of the dust collecting mechanism 30 is again suppressed.
At the same time, the opening / closing valve 37B of the damper 37 is also switched to the “open” state, and the inside of the header tank 34 is opened to the outside through the damper main body 37A.

Thereafter, the channel brush 21 starts to rise.
Further, as the channel brush 21 rises, the suction pad 41 also starts to rise while the unnecessary portion of the plate glass G is sucked.

Here, the state of the protective sheet S is completely released from the pressed state by the channel brush 21 and the suction pad 41. As described above, the shutter plate 38 of the nozzle 31 is already in the “standby mode”. Since the suction pressure of the dust collection mechanism portion 30 is suppressed, the nozzle 31 of the dust collection mechanism portion 30 does not rise while sucking a part of the protective sheet S and being rolled up.
However, even when the shutter plate 38 of the nozzle 31 is in the “standby mode” state, the suction pressure of the dust collecting mechanism portion 30 is not completely stopped but is exerted in a suppressed state. For example, glass powder or the like that has already been sucked and temporarily stored in the header tank 34 does not fall down from the nozzle port 31B of the nozzle 31.

  As shown in FIG. 4E, when the channel brush 21 reaches the “upper standby position” again, the channel brush 21 stops rising.

  On the other hand, when the suction pad 41 reaches the “upper standby position” again, the suction pad 41 moves to a predetermined location (such as a discharge conveyor) while the unnecessary portion of the plate glass G is sucked, and the unnecessary portion of the plate glass G is transferred. After that, it moves again to the “upper standby position” and stops.

Then, the broken plate glass G is unloaded from the manufacturing apparatus 1.
As a result, the operation procedure of the manufacturing apparatus 1 is temporarily ended, and the process waits until another new plate glass G is put into the cleaving apparatus 1.

10 Folding mechanism (folding means)
30 Dust collection mechanism (dust collection means)
30 Dust collection mechanism (dust collection means)
31 Nozzle 31B Nozzle port 33 Duct pipe (pipe member)
34 Header Tank 36 Dust Collector 37 Damper 38 Shutter Plate 38A Large Notch Hole 38B Small Notch Hole G Sheet Glass Ga First Main Surface Gb Second Main Surface L Scribe Wire S Protective Sheet

Claims (10)

A plate glass placed on the protective sheet such that the first main surface has a scribe line and the second main surface opposite to the first main surface is in contact with the protective sheet. It is a manufacturing method of the plate glass which cuts along,
While cleaving the plate glass by pressing the second main surface along the scribe line through the protective sheet by the folding means,
Dust collecting means collects the glass powder generated when the plate glass is cleaved from the first main surface side,
The dust collecting means includes
A dust collection mode having a predetermined suction force for collecting the glass powder;
A standby mode having a relatively weak suction force compared to the predetermined suction force;
Two types of operation modes can be selected.
The manufacturing method of the plate glass characterized by the above-mentioned. The dust collecting means includes
A nozzle serving as a suction port for the glass powder;
A piping member communicating with the nozzle;
A shutter plate for adjusting the opening area of the piping member;
Comprising
The manufacturing method of the plate glass of Claim 1 characterized by the above-mentioned. The shutter plate is formed with a large notch hole and a small notch having a shape obtained by reducing the diameter of the large notch hole,
While the shutter plate moves the large notch hole to the end of the piping member, the dust collection means is set to the dust collection mode,
The dust collecting means is set to the standby mode by moving the small notch hole to the end of the piping member by the shutter plate.
The manufacturing method of the plate glass of Claim 2 characterized by the above-mentioned. The inner diameter of the small notch hole is not less than 1/4 and not more than 1/3 of the inner diameter of the large notch hole.
The manufacturing method of the plate glass of Claim 3 characterized by the above-mentioned. The dust collecting means includes
A header tank to which the piping member is connected;
A dust collector connected to the header tank;
Have
A damper having an opening / closing function is connected to the header tank,
In the dust collection mode, the damper is closed,
In the standby mode, the damper is in an open state,
The manufacturing method of the plate glass as described in any one of Claims 1-4 characterized by the above-mentioned. A plate glass placed on the protective sheet such that the first main surface has a scribe line and the second main surface opposite to the first main surface is in contact with the protective sheet. An apparatus for producing flat glass that cleaves along,
Folding means for cleaving the plate glass by pressing the second main surface along the scribe line through the protective sheet;
Dust collecting means for collecting the glass powder generated when the plate glass is cleaved from the first main surface side;
With
The dust collecting means includes
A dust collection mode having a predetermined suction force for collecting the glass powder;
A standby mode having a relatively weak suction force compared to the predetermined suction force;
Two types of operation modes can be selected.
An apparatus for producing flat glass, characterized in that. The dust collecting means includes
A nozzle serving as a suction port for the glass powder;
A piping member communicating with the nozzle;
A shutter plate for adjusting the opening area of the piping member;
Comprising
The plate glass manufacturing apparatus according to claim 6, wherein: The shutter plate is formed with a large notch hole and a small notch having a shape obtained by reducing the diameter of the large notch hole,
While the shutter plate moves the large notch hole to the end of the piping member, the dust collection means is set to the dust collection mode,
The dust collecting means is set to the standby mode by moving the small notch hole to the end of the piping member by the shutter plate.
The plate glass manufacturing apparatus according to claim 7, wherein: The inner diameter of the small notch hole is not less than 1/4 and not more than 1/3 of the inner diameter of the large notch hole.
The plate glass manufacturing apparatus according to claim 8, wherein: The dust collecting means includes
A header tank to which the piping member is connected;
A dust collector connected to the header tank;
Have
A damper having an opening / closing function is connected to the header tank,
In the dust collection mode, the damper is closed,
In the standby mode, the damper is in an open state,
The manufacturing apparatus of the plate glass as described in any one of Claims 6-9 characterized by the above-mentioned.

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