JP2014189421A - Scribe line processing device, scribe line processing method, and method of manufacturing plate glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scribe line processing device, a scribe line processing method, and a method of manufacturing a plate glass such that when a scribe line is processed on a plate-like glass which is thinner in plate thickness than before, the plate-like glass is prevented from cracking, and contact pressure of a scribe chip to the plate-like glass can be held constant.SOLUTION: A scribe line processing device 7 processes a scribe line K2 orthogonal to a conveying direction X of a glass ribbon 4 by displacing a scribe chip 8, to the glass ribbon 4 conveyed in a horizontal direction while having one main surface supported by conveyor rollers 5, 5, ..., obliquely to the conveying direction X of the glass ribbon 4 while pressing the scribe chip 8 against an upper surface of the glass ribbon 4. The scribe line processing device has a blow device 9 which blows air to a lower surface of the glass ribbon 4 at a scribe part S as a displacement area of the scribe chip 8, and the blow device 9 floats and holds at least a part of the lower surface of the glass ribbon 4 with air pressure.

Description

  The present invention relates to a technique for processing a scribe line with respect to a sheet glass being conveyed.

Conventionally, a scribing tool (hereinafter referred to as a scribe chip) is pressed against the upper surface of a sheet glass that is conveyed in a horizontal direction with a plurality of conveying rollers oriented in the vertical direction. There is known a technique for processing a marking line perpendicular to the conveying direction of a sheet glass by displacing the plate diagonally in the horizontal direction.
The marking line is a line that is processed to fold (break) the sheet glass along the line, and is hereinafter referred to as a “scribe line”.
In addition, the “plate glass” referred to here is a glass (plate glass) having a predetermined plate thickness and cut to a predetermined size, and a predetermined plate thickness and cut to a predetermined size. It is a concept that includes both glass (glass ribbons) in a continuous form before (hereinafter the same).

First, a conventional method for manufacturing a glass sheet will be described with reference to FIG.
As shown in FIG. 7, in the manufacturing method of the conventional plate glass, through each manufacturing process of melt | dissolution (STEP-1), a float bath (STEP-2), slow cooling (STEP-3), and cutting | disconnection (STEP-4), A rectangular plate glass having a predetermined plate thickness and size is manufactured.
In addition, the conventional manufacturing method of plate glass is implement | achieved by the plate glass manufacturing apparatus 200 shown in FIG.
The plate glass manufacturing apparatus 200 includes a melting furnace 1, a float bath 2, a slow cooling furnace 6, a plate glass cleaving apparatus 201, and the like.

  In the step of melting (STEP-1), silica sand, soda ash, limestone, etc., which are raw materials for plate glass, are melted by heating to, for example, about 1500 to 1600 ° C. in the melting furnace 1 to obtain a liquid glass melt. Is generated.

In the float bath (STEP-2) process, the glass melt generated in the melting (STEP-1) process is poured into a tank (float bath 2) in which molten tin (Sn) is stored while adjusting the flow rate. .
Then, the glass melt poured into the float bath 2 is floated on the surface of molten tin to form a glass melt film.
Then, the glass melt film formed in the float bath 2 is stretched to the left and right by the roller 3 and pulled up while forming a predetermined thickness and width, and is a plate-like glass continuous in the conveying direction. (Hereinafter referred to as a glass ribbon 4).

  In the step of slow cooling (STEP-3), the glass ribbon 4 formed in the step of float bath (STEP-2) is fed into the slow cooling furnace 6 while being transported by a plurality of transport rollers 5, 5. The glass is solidified by gradually lowering the temperature of the glass ribbon 4.

  In the step of cutting (STEP-4), the scribe line processing device 57 is used for the glass ribbon 4 fed out from the slow cooling furnace 6 toward the conveying direction X through the step of slow cooling (STEP-3). The scribe line is processed, and the glass ribbon 4 is cleaved by the cleaving device 10 along the processed scribe line.

The scribe line processing device 57 includes a scribe tip 8 that is a tool for processing a scribe line.
The scribe chip 8 is supported by a traverse device (not shown) or the like so that it can be displaced in a predetermined direction set at a predetermined speed.
Then, in the cutting step (STEP-4), the tip of the scribe tip 8 is pressed against the upper surface of the glass ribbon 4 while being displaced in a “predetermined direction” at a “predetermined speed”, thereby scribing the glass ribbon 4. The line is processed.

Here, “predetermined direction” and “predetermined speed” for displacing the scribe chip 8 will be described.
In order to cut out the rectangular plate glass 11 from the glass ribbon 4 having side portions parallel to the right and left with respect to the transport direction X, it is necessary to process a scribe line in a direction orthogonal to the transport direction X of the glass ribbon 4.
And in order to process a scribe line in the direction orthogonal to a conveyance direction with respect to the glass ribbon 4 in the middle of conveyance, the scribe chip | tip 8 is conveyed to the conveyance direction X of the glass ribbon 4, and conveyance of the glass ribbon 4 is carried out. While displacing at the same speed as the speed, it is necessary to displace at a speed suitable for the processing of the scribe line in the direction orthogonal to the conveyance direction X of the glass ribbon 4.
For this reason, conventionally, when a scribe line is processed in the step of cutting (STEP-4), the scribe chip 8 is inclined with respect to the conveyance direction X of the glass ribbon 4 and in a horizontal “predetermined direction”. The scribe line orthogonal to the transport direction X of the glass ribbon 4 is processed by displacing at a “predetermined speed” suitable for processing of the scribe line (that is, skewed with respect to the transport direction X). .

And in the process of cutting (STEP-4), the rectangular plate glass 11 is produced | generated by cutting out the glass ribbon 4 by predetermined | prescribed length and width | variety along the processed scribe line with the cleaving apparatus 10. FIG.
The cleaving device 10 is a device for cleaving the glass ribbon 4 on which the scribe line is formed along the scribe line. By pressing the lower surface of the glass ribbon 4 in the vicinity of the scribe line upward, The glass ribbon 4 is folded using the pressing portion as a fulcrum.
The scribe line processing device 57 and the cleaving device 10 constitute a plate glass cleaving device 201 in the plate glass manufacturing apparatus 200.

Here, a conventional scribe line processing apparatus will be described with reference to FIGS.
As shown in FIGS. 7 and 8 (a) and 8 (b), the conventional scribe line processing device 57 is used to process a scribe line on the glass ribbon 4 conveyed by the conveying rollers 5, 5. A scribe tip 8 as a tool is provided.

In the following, the displacement area of the scribe chip 8 is defined as a scribe portion S.
More specifically, the scribe section S has a displacement in the direction perpendicular to the conveyance direction X of the glass ribbon 4 of the scribe chip 8 with the displacement range of the scribe chip 8 in the conveyance direction X of the glass ribbon 4 as a length. It is a rectangular area in plan view with a range as the width.
That is, the scribe part S is an area including a rectangular area whose diagonal is a locus where the scribe chip 8 is displaced.

As shown in FIGS. 8A and 8B, in the conventional scribe line processing device 57, the glass ribbon 4 is supported by the transport roller 5 in the scribe section S.
The conveying rollers 5, 5... Arranged in the scribe unit S are arranged at predetermined intervals while being orthogonal to the conveying direction X of the glass ribbon 4.

In such a configuration, when the scribe chip 8 is skewed in the scribe section S, a part for pressing the scribe chip 8 against the glass ribbon 4 not backed up from below by the transport roller 5 is generated. In this case, the glass ribbon 4 is bent downward due to the pressing by the scribe chip 8.
If the portion of the glass ribbon 4 that is not backed up by the transport roller 5 bends downward, the contact pressure of the scribe tip 8 against the glass ribbon 4 will not be uniform. Therefore, the scribe line K1 processed in this way has a processing depth. Is uneven.

Then, when the glass ribbon 4 is to be cleaved by the cleaving device 10 along the scribe line K1 having a non-uniform processing depth, the glass cannot be cleaved or the glass is broken due to insufficient depth of the scribe line. There was a fear.
Moreover, even if the glass was able to be cut, there was a case where the cut surface (end surface orthogonal to the conveyance direction X) was in a non-uniform shape.
That is, in the conventional scribe line processing device 57, there has been a concern about a decrease in productivity and variations in quality of the plate glass 11.

  When the plate thickness of the glass ribbon 4 is sufficiently thick, such a bend is small (or negligible), but the bend increases as the glass ribbon 4 is made thinner. It becomes difficult to cope with the thinning of the glass ribbon 4.

  In recent years, further thinning of the plate glass has been promoted. However, in the conventional scribe line processing device 57, for example, when the plate thickness of the glass ribbon 4 becomes 1.5 mm or less, the above-described bending occurs. There was a problem that I could not.

  On the other hand, in the technology for processing the scribe line for the plate glass, there is also a technology for processing in a non-contact manner using a laser, but the processing speed is inferior compared to the case of using a scribe tip, There was also a situation where the laser scribe line processing technology could not be actively adopted.

  Therefore, in order to cope with further thinning of the plate glass, various scribe line processing techniques using a scribe chip (that is, by a method in which the scribe chip is brought into contact) have been studied. The technique is disclosed in FIG.

  The prior art according to Patent Document 1 is configured to convey plate glass by pressing a plurality of conveyance rollers arranged in a direction orthogonal to the conveyance direction of the plate glass and the upper surface of the plate glass being conveyed and moving obliquely. It is the technique which concerns on the scribe line processing apparatus of the plate glass provided with the cutting tool (scribe chip) which processes the scribe line orthogonal to the direction.

In the scribe line processing apparatus according to Patent Document 1, the conveyance roller is divided at least in a range where the scribe chip is moved obliquely, and a backup roller that is in contact with the lower surface of the plate glass below the scribe chip between the divided conveyance rollers. The traveling road is formed.
In the scribe line processing apparatus according to Patent Document 1, the backup roller is configured to travel along the travel path in the same direction and at the same speed as the scribe tip by the travel means.
With such a configuration, it is possible to suppress the bending of the plate glass at the portion where the scribe chip and the plate glass abut, and to process a stable scribe line on the surface of the plate glass.

JP 2011-153059 A

However, even if the configuration in which the backup roller is brought into contact with the lower surface of the plate glass as in the scribe line processing apparatus according to Patent Document 1, the contact pressure of the scribe chip with respect to the plate glass is still thin and easily corrugated. It was difficult to keep the constant.
That is, the conventional technology still has a problem that it is difficult to keep the depth of the scribe line constant, the glass cannot be broken, and the quality of the cut section varies.
Further, the configuration in which the backup roller is provided has a problem that the facilities are complicated, the maintainability is poor, and the introduction and maintenance costs of the facilities are increased.

  The present invention has been made in view of such a problem of the present situation, and in the processing of a scribe line for a sheet glass having a thin plate thickness as compared with the prior art, it prevents cracking of the sheet glass, and An object of the present invention is to provide a scribing line processing apparatus, a scribing line processing method, and a plate glass manufacturing method capable of maintaining a constant contact pressure of a scribe tip with respect to 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 scribing line processing apparatus according to the present invention is configured to press the scribe chip against the upper surface of the plate glass while pressing the scribe chip against the plate glass supported on one main surface by a plurality of transfer rollers and conveyed in the horizontal direction. It is a scribe line processing device for processing a scribe line that is displaced obliquely with respect to the conveyance direction of the plate glass and perpendicular to the conveyance direction of the plate glass, and in a scribe portion that is a displacement region of the scribe chip, A blow device that blows gas onto the lower surface of the plate glass is provided, and at least a part of the lower surface of the plate glass is floated and held by gas pressure by the blow device.

  Further, in the scribe line processing apparatus according to the present invention, the scribe portion is a region including a rectangular region whose diagonal line is the locus of the scribe chip, and the blow device follows the locus of the scribe chip in the scribe portion. In the first region, the first region that blows gas onto the lower surface of the sheet glass, and the second region that is a region other than the first region in the scribe portion, the gas on the lower surface of the sheet glass It is preferable that it is comprised by the 2nd site | part which sprays, and it is comprised so that the pressure of the gas sprayed by said 1st site | part and said 2nd site | part can be controlled separately.

  Further, in the scribe line processing apparatus according to the present invention, the first part of the blowing device is in addition to the lower surface of the plate glass in a region immediately below the scribe chip in synchronization with the displacement of the scribe chip. It is preferable that the gas is blown at a pressure higher than the above region.

  Moreover, it is preferable that the scribe line processing apparatus which concerns on this invention is provided with the upper contact member which contacts the right-and-left both ends with respect to the conveyance direction of the said sheet glass from the upper direction in the said scribe part.

Moreover, it is preferable that the scribe line processing apparatus which concerns on this invention is provided with the side contact member which contacts the left and right both ends with respect to the conveyance direction of the said sheet glass from the side in the said scribe part.
According to such a configuration, it is possible to prevent the plate glass from drifting left and right with respect to the transport direction in the scribe portion. Thereby, the linearity of the scribe line can be maintained high.

  Moreover, the scribe line processing method according to the present invention is a method in which the glass sheet is conveyed in the horizontal direction with one main surface supported by a plurality of conveying rollers while pressing the scribe chip on the upper surface of the glass sheet. A scribe line processing method for processing a scribe line orthogonal to the sheet glass conveyance direction by displacing the scribe chip obliquely with respect to the sheet glass conveyance direction, wherein the scribe chip displacement The plate-like glass in the scribe part which is a region is conveyed by being blown up by blowing a gas on the lower surface of the plate-like glass.

  Further, in the method for producing a plate glass according to the present invention, the glass ribbon is conveyed in the horizontal direction while supporting the one main surface by a plurality of conveying rollers, while pressing the scribe chip on the upper surface of the glass ribbon, A step of processing a scribe line perpendicular to the glass ribbon conveyance direction by displacing the scribe chip obliquely with respect to the glass ribbon conveyance direction, and along the scribe line Cutting the glass ribbon to generate a plate glass, and a method of manufacturing the plate glass, in the step of processing the scribe line, the glass ribbon in the scribe portion which is a displacement region of the scribe chip, Floating and conveying by blowing gas on the lower surface of the glass ribbon To.

Moreover, the manufacturing method of the plate glass which concerns on this invention WHEREIN: In the said scribe part, it is that the said glass ribbon is levitated to the same height as the height of the said glass ribbon when it is conveyed with the said some conveyance roller. preferable.
According to such a configuration, the contact pressure between the glass sheet and the scribe chip can be more reliably maintained constant in the scribe portion.

  As effects of the present invention, the following effects can be obtained.

According to the scribe line processing apparatus according to the present invention, the contact pressure between the glass sheet and the scribe chip can be kept constant in the scribe section.
Thereby, the scribe line with a uniform processing depth can be processed with respect to plate-shaped glass.

Further, according to the scribe line processing method of the present invention, the contact pressure between the plate glass and the scribe chip can be kept constant in the scribe portion.
Thereby, the scribe line with a uniform processing depth can be processed with respect to plate-shaped glass.

Moreover, according to the manufacturing method of the plate glass which concerns on this invention, the contact pressure of a glass ribbon and a scribe chip | tip can be kept constant in a scribe part.
Thereby, it is possible to process a scribe line having a uniform processing depth with respect to the glass ribbon. By cutting the glass ribbon along the scribe line, it is possible to prevent breakage of the plate glass and to cut the plate glass. It is possible to stabilize the quality of the plate glass by suppressing the variation of the shape of the glass sheet.

The flowchart which shows the flow of the manufacturing method of the plate glass which concerns on one Embodiment of this invention. The schematic diagram which shows the scribe line processing apparatus which concerns on 1st embodiment of this invention, (a) Plane schematic diagram, (b) Side surface schematic diagram. The partial expansion schematic diagram which shows the scribe line processing apparatus which concerns on 1st embodiment of this invention. The schematic diagram which shows the scribe line processing apparatus which concerns on 2nd embodiment of this invention, (a) Plane schematic diagram, (b) Side surface schematic diagram. The schematic diagram which shows the scribe line processing apparatus which concerns on 2nd embodiment of this invention, (a) Partial expansion schematic diagram, (b) The part which shows the modification of the scribe line processing apparatus which concerns on 2nd embodiment of this invention An enlarged schematic diagram. Partial enlarged schematic view showing a scribe line processing apparatus according to another embodiment, (a) a view showing a scribe line processing apparatus according to a third embodiment of the present invention, (b) a fourth embodiment of the present invention. The figure which shows the scribe line processing apparatus which concerns. The flowchart which shows the flow of the manufacturing method of the conventional plate glass. The schematic diagram which shows the conventional scribe line processing apparatus, (a) Plane schematic diagram, (b) Side surface schematic diagram.

Next, embodiments of the invention will be described.
First, the scribe line processing apparatus according to the first embodiment of the present invention and a method for producing a plate glass using the same will be described.
In addition, here, the manufacturing method of the plate glass by the float method is illustrated and demonstrated.

As shown in FIG. 1, the manufacturing method of the plate glass which concerns on one Embodiment of this invention is melt | dissolution (STEP-1), float bath (STEP-2), slow cooling (STEP-3), cutting | disconnection (STEP-4). Through each manufacturing process, a plate glass 11 having a predetermined size is manufactured.
In addition, the manufacturing method of the plate glass which concerns on one Embodiment of this invention is implement | achieved by the plate glass manufacturing apparatus 100 shown in FIG.
The plate glass manufacturing apparatus 100 includes a melting furnace 1, a float bath 2, a slow cooling furnace 6, a plate glass cleaving apparatus 101, and the like.

  And as shown in FIG. 1, the manufacturing method of the plate glass which concerns on one Embodiment of this invention is the process (FIG. 4) of the cutting | disconnection (STEP-4) in the manufacturing method of the conventional plate glass (FIG. 4). 7) and is characterized in this respect.

In other words, the manufacturing method of the plate glass which concerns on one Embodiment of this invention is the manufacturing method of the conventional plate glass about each process (STEP-1)-(STEP-3) other than the process of cutting (STEP-4). The same process can be adopted.
For this reason, in description of the manufacturing method of the plate glass which concerns on one Embodiment of this invention, about description of each process of melt | dissolution (STEP-1)-slow cooling (STEP-3) shall be abbreviate | omitted.

In the manufacturing method of the plate glass which concerns on one Embodiment of this invention, with respect to the glass ribbon 4 sent out from the slow cooling furnace 6 through the process of slow cooling (STEP-3) in the process of cutting (STEP-4), A scribe line is processed by the scribe line processing device 7.
Then, along the scribe line processed by the scribe line processing device 7, the glass ribbon 4 is cut out with a predetermined length and width by the cleaving device 10 to generate a rectangular plate glass 11.
The scribe line processing device 7 and the cleaving device 10 constitute a plate glass cleaving device 101 in the plate glass manufacturing apparatus 100.

  Further, the scribe chip 8 in the scribe line processing apparatus 7 is displaced in a “predetermined direction” at a “predetermined speed” and is configured to process the scribe line while being skewed with respect to the conveyance direction X of the glass ribbon 4. Yes.

Next, the scribe line processing apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 2 to 6, 7, and 8.
2A and 2B, in the scribe line processing device 7 according to the first embodiment of the present invention, the glass ribbon 4 is conveyed while being supported by the blow device 9 in the scribe section S. .
As shown in FIG. 3, the blow device 9 is a device that can blow gas against the lower surface of the glass ribbon 4, and includes a table-shaped main body portion 9 a.
In the present embodiment, the type of gas blown against the lower surface of the glass ribbon 4 is air.

A gap 9b that is a space for circulating air is formed inside the main body 9a, and a plurality of holes 9c, 9c,... It is formed on the upper surface.
An air source (not shown) such as a blower, a fan, an air pipe, or the like is connected to the gap 9b. By sending air into the gap 9b with a predetermined pressure by the air source, the holes 9c, 9c,.・ It is configured so that air can be ejected from.

  The holes 9c, 9c,... Are formed on the entire upper surface of the main body 9a while ensuring a predetermined interval over the entire length and the entire width of the main body 9a.

As shown in FIGS. 2A and 2B, the main body 9 a is upstream of the scribing portion S with respect to the conveyance direction X of the glass ribbon 4 in order to provide a running section on the upstream side and downstream side of the scribe portion S. Longer toward the side and downstream.
That is, the glass ribbon 4 transitions from the conveyance by the conveying rollers 5, 5... To the state where the glass ribbon 4 is floated and conveyed by the blow device 9 on the upstream side with respect to the conveyance direction X from the scribe unit S. Further, on the downstream side with respect to the transport direction X, the state of being floated and transported by the blow device 9 is changed to transport by the transport rollers 5.
In addition, R part (curved surface part) is formed in the uppermost stream part and the uppermost part of the most downstream part with respect to the conveyance direction X of the main body part 9a, and the glass ribbon 4 is connected to the blow device 9 and the conveyance rollers 5, 5,. -It is set as the structure which prevents that the glass ribbon 4 contacts the main-body part 9a and a damage | wound etc. arise when changing between.

As shown in FIG. 3, in the scribe line processing device 7, the height of the upper surface of the main body 9 a is made lower than the height of the conveying surface by the conveying rollers 5, 5. And a predetermined gap A between the lower surface of the glass ribbon 4.
And in such an arrangement, an air layer (gap A) having a predetermined pressure is formed between the main body 9a and the glass ribbon 4 by ejecting air from the holes 9c, 9c. The glass ribbon 4 is supported while being floated from the main body 9a.

  Further, in the scribe line processing apparatus 7, the height of the glass ribbon 4 in the scribe portion S is adjusted by adjusting the air amount and air pressure to be ejected from the holes 9c, 9c. It is made to correspond to the height of the glass ribbon 4 at the time of conveying with the conveyance roller 5,5 ... in the upstream and downstream of the scribe part S. FIG.

In such a configuration, since the supporting force for the glass ribbon 4 by the air layer is uniformly held in each part of the scribe part S, when the scribe chip 8 is skewed in the scribe part S, the glass ribbon 4 is scribed. In any part of the part S, the air layer backs up with a uniform pressure from below.
For this reason, in the scribe line processing apparatus 7, the contact pressure of the scribe tip 8 with respect to the glass ribbon 4 can be kept constant.
Then, by maintaining the contact pressure of the scribe tip 8 against the glass ribbon 4 uniformly, the scribe line K2 having a uniform processing depth can be formed.

The scribe line processing device 7 can process the scribe line K2 having a uniform processing depth on the glass ribbon 4 having a thin plate thickness (for example, when the glass ribbon 4 has a plate thickness of 1.5 mm or less). It is possible and is particularly suitable for the application of processing the scribe line K2 having a uniform processing depth with respect to the glass ribbon 4 having a plate thickness of 1.0 mm or less.
That is, the scribe line processing device 7 can cope with the thinning of the plate glass 11.

  And according to the scribe line processing apparatus 7, since the scribe line K2 with a uniform processing depth can be processed with respect to the glass ribbon 4, the cleaving apparatus 10 cleaves the glass ribbon 4 along the scribe line K2. When this is done, it is possible to prevent the plate glass 11 from cracking, and to make the shape of the cut section (end surface orthogonal to the transport direction X) uniform, thereby suppressing variations in the quality of the plate glass 11.

  That is, the scribing line processing apparatus 7 according to the first embodiment of the present invention is a plate-like glass (in this embodiment, supported on one main surface by a plurality of transport rollers 5, 5. The scribe line perpendicular to the transport direction X of the glass ribbon 4 is displaced obliquely with respect to the transport direction X of the glass ribbon 4 while pressing the scribe chip 8 against the upper surface of the glass ribbon 4 with respect to the glass ribbon 4). K2 is processed, and a scribe portion S that is a displacement region of the scribe tip 8 is provided with a blow device 9 that blows gas (air in the present embodiment) onto the lower surface of the glass ribbon 4. At least a part of the lower surface of the ribbon 4 is floated and held by air pressure.

By using the scribe line processing device 7 having such a configuration, the contact pressure between the glass ribbon 4 that is a plate glass and the scribe chip 8 can be kept constant in the scribe section S.
Thereby, it is possible to process the scribe line K <b> 2 having a uniform processing depth with respect to the glass ribbon 4.

In the present embodiment, the case where the glass sheet to be processed by the scribe line processing device 7 is the glass ribbon 4 (that is, a continuous form) is described as an example. The aspect of the sheet glass to be processed is not limited to this.
That is, the scribe line processing apparatus 7 according to the first embodiment of the present invention is also used for processing a scribe line in order to further cut a long plate glass that has already been cut to a predetermined length. be able to.

Next, the scribe line processing apparatus according to the second embodiment of the present invention will be described.
As shown in FIGS. 4A and 4B, the scribe line processing device 17 according to the second embodiment of the present invention is different from the scribe line processing device 7 according to the first embodiment in the scribe portion S. A blower 19 is provided instead of the device 9.
The scribe line processing device 17 and the cleaving device 10 constitute a plate glass cleaving device 102.

  4 (a) and 4 (b), the scribe line processing device 17 includes, in the scribe portion S, upper pressing rollers 12, 12... That are members that contact the glass ribbon 4 from above. Side pressing rollers 13, 13... That are members that come into contact with the glass ribbon 4 from the side are provided, and this point is also different from the scribe line processing device 7.

The configuration of the scribe line processing device 17 other than the blow device 19 and the pressing rollers 12 and 13 is the same as the configuration of the scribe line processing device 7 according to the first embodiment of the present invention. Description of is omitted.
And the scribe line processing apparatus 17 can be replaced with the scribe line processing apparatus 7 according to the first embodiment of the present invention shown in FIG. That is, the sheet glass cleaving apparatus 102 can be replaced with the sheet glass cleaving apparatus 101 shown in FIG.

As shown in FIG. 5 (a), the blow device 19 is a device that can blow gas against the lower surface of the glass ribbon 4, and the table-like main body portion is composed of a first main body portion 19a and a second main body portion 19b. The third main body 19c is divided into three parts.
5A and 5B are cross-sectional views of the scribe line processing apparatus 17 taken along the line BB ′.
As shown in FIG. 4, the BB ′ line is a line extending in the length direction of the glass ribbon 4 (a direction parallel to the conveyance direction X of the glass ribbon 4 in the horizontal plane).

  The first main body portion 19a has a parallelogram shape in plan view so as to include a region corresponding to the locus drawn by the scribe chip 8 in the scribe portion S.

The 2nd main-body part 19b is arrange | positioned rather than the 1st main-body part 19a in the upstream with respect to the conveyance direction X of the glass ribbon 4, and has a substantially trapezoid form in planar view.
Moreover, the 3rd main-body part 19c is arrange | positioned rather than the 1st main-body part 19a in the downstream with respect to the conveyance direction X of the glass ribbon 4, and has a substantially trapezoid form in planar view.

  Then, by arranging the first main body portion 19a, the second main body portion 19b, and the third main body portion 19c as shown in FIG. 4A, the table-shaped main body portion that is substantially rectangular in plan view as a whole. Is configured.

As shown in FIG. 5A, inside each of the first to third main body portions 19a, 19b, and 19c, void portions 19d, 19d, and 19d, which are spaces for circulating air, are formed. In each of the first to third main body portions 19a, 19b, 19c, a plurality of hole portions 19e, 19e,.
An air source (not shown) such as a blower, a fan, and an air pipe is connected to each of the gaps 19d, 19d, and 19d, and air is fed into the gap 19d with a predetermined pressure by the air source. It is comprised so that air can be ejected from part 19e * 19e ....

Moreover, the hole part 19e formed in each main-body part 19a * 19b * 19c of the blow apparatus 19 is good also as a structure which changes the hole diameter, the number of holes formed per unit area, etc. FIG.
In the blower device 19, the first main body 19 a and the other main bodies 19 b and 19 c are provided with a difference in the hole diameter of the hole 19 e and the number of holes per unit area. The pressure applied to the ribbon 4 is set to be higher than the pressure of the air blown out from the other main body portions 19b and 19c.

Alternatively, the scribing line processing device 17 is configured so that the pressure and the amount of air supplied to each of the gap portions 19d, 19d, and 19d can be changed for each gap portion 19d, and the gap of the first main body portion 19a. It is good also as a structure which supplies air with the pressure higher than the other space | gap part 19d with respect to the part 19d.
Furthermore, the division | segmentation of the main-body part of the blow apparatus 19 should just be able to adjust the pressure of the said 3 divisions, and the structure which can adjust the pressure of 4 divisions or more may be sufficient as it.

  And by such a structure, the site | part where the scribe chip | tip 8 is pressed in the glass ribbon 4 is supported by the air layer which has a high pressure compared with the site | part where the scribe chip | tip 8 is not pressed, and a glass ribbon is carried out by the scribe chip | tip 8. By reliably resisting the pressing force applied to 4, the glass ribbon 4 is more reliably prevented from being bent in the scribe portion S.

  Further, with such a configuration, the contact pressure of the scribe tip 8 with respect to the glass ribbon 4 can be kept constant, and the scribe line K2 having a uniform processing depth can be formed.

The scribe line processing device 17 can process the scribe line K2 having a uniform processing depth on the glass ribbon 4 having a thin plate thickness (for example, when the glass ribbon 4 has a plate thickness of 1.5 mm or less). The glass ribbon 4 having a plate thickness of 1.0 mm or less is particularly suitable for use in processing the scribe line K2 having a uniform processing depth.
That is, the scribe line processing device 17 can cope with the thinning of the plate glass 11.

  And since the scribe line K2 with a uniform processing depth can be processed with respect to the glass ribbon 4 by using the scribe line processing device 17, when the glass ribbon 4 is cleaved along the scribe line K2 by the cleaving device 10. It is possible to suppress the variation in the quality of the plate glass 11 by making the shape of the split section uniform.

Here, as shown in FIG. 5A, the scribe line processing device 17 including the blow device 19 that is physically divided into three parts has been described as an example. The scribing line processing apparatus 17 according to the second embodiment may have a configuration in which the first to third main body portions 19a, 19b, and 19c are integrated.
That is, the scribe line processing device 17 according to the second embodiment of the present invention is configured as an apparently one main body portion as shown in FIG. The configuration may be such that 19d and 19d are partitioned.
Further, the air ejected from the first main body portion 19 a arranged along the locus drawn by the scribe tip 8 may be configured to be ejected only when the scribe line is processed on the glass ribbon 4 by the scribe tip 8. it can.

Here, the upper pressing roller 12 and the side pressing roller 13 will be described.
In the scribe line processing device 17, since the glass ribbon 4 in the scribe part S is levitated by the air layer, there is a possibility that the glass ribbon 4 pulsates in the vertical direction and rises above a predetermined conveying height.
Therefore, as shown in FIGS. 4A and 4B, in the scribe line processing device 17, the upper pressing roller 12 that is a member (upper contact member) that comes into contact with the glass ribbon 4 from above in the scribe portion S. -It is set as the structure provided with 12 ....

In the scribe line processing device 17, the distance between the conveying surface of the glass ribbon 4 (that is, the upper end position of the conveying rollers 5, 5...) And the lowermost end portion of the upper pressing roller 12 is the thickness of the glass ribbon 4. Match.
With such a configuration, it is possible to prevent the glass ribbon 4 from being lifted excessively in the scribe portion S, and to hold the contact pressure of the scribe tip 8 against the glass ribbon 4 more reliably and constant.

Further, since the glass ribbon 4 is levitated by the air layer in the scribe portion S, when the scribe chip 8 is displaced while pressing the upper surface of the glass ribbon 4, a lateral force is applied in the conveying direction X. On the other hand, it may drift left and right (meander).
4 (a) and 4 (b), in the scribe line processing device 17, in the scribe section S, a member (side contact) that contacts the glass ribbon 4 from the left and right sides with respect to the transport direction X. ... Are configured to guide the glass ribbon 4.
Then, the side pressing rollers 13, 13... Are excellent in linearity (not meandering) by processing the scribe line while preventing the glass ribbon 4 from meandering in the scribe part S. The scribe line K2 can be processed.

In the present embodiment, a case where a roller member (respective pressing rollers 12 and 13) is employed as the upper contact member and the side contact member is illustrated, but the upper contact member and the side contact member are These members are not necessarily roller members, and various members can be adopted as long as the members can regulate the position without damaging the glass ribbon 4.
Further, the upper pressing roller 12 and the side pressing roller 13 can be attached to the scribe line processing device 7 according to the first embodiment of the present invention.
5A and 5B, illustration of the upper pressing roller 12 and the side pressing roller 13 is omitted for convenience of explanation.

  That is, in the scribe line processing apparatus 17 according to the second embodiment of the present invention, the scribe part S is an area including a rectangular area whose diagonal is the locus of the scribe chip 8, and the blow apparatus 19 is provided in the scribe part S. In the first region along the trajectory of the scribe chip 8, the first body portion 19 a that is the first portion that blows air onto the lower surface of the glass ribbon 4 and the second region that is a region other than the first region in the scribe portion S. The second main body portion 19b and the third main body portion 19c, which are second portions for blowing air onto the lower surface of the glass ribbon 4, in the region of the first main body portion 19a and the second and third main body portion 19b. -It is comprised so that the pressure of the air sprayed by 19c can be controlled separately.

  Moreover, in the scribe line processing apparatus 17 which concerns on 2nd embodiment of this invention, in the scribe part S, the upper press roller 12 which is an upper contact member which contacts the right-and-left both ends with respect to the conveyance direction X of the glass ribbon 4 from the upper direction. It is to be prepared.

By using the scribe line processing device 17 having such a configuration, the contact pressure between the glass ribbon 4 that is a plate-like glass and the scribe chip 8 can be kept constant in the scribe section S.
Thereby, it is possible to process the scribe line K <b> 2 having a uniform processing depth with respect to the glass ribbon 4.

  Moreover, in the scribe line processing apparatus 17 which concerns on 2nd embodiment of this invention, in the scribe part S, the side part presser which is a side contact member which contacts the right and left both ends with respect to the conveyance direction X of the glass ribbon 4 from the side. A roller 13 is provided.

And by using the scribe line processing device 17 having such a configuration, it is possible to prevent the glass ribbon 4, which is a plate glass, from drifting to the left and right with respect to the transport direction X in the scribe section S.
Thereby, the linearity of the scribe line K2 can be ensured.

Next, the scribe line processing apparatus according to the third and fourth embodiments of the present invention will be described.
The scribe line processing apparatus according to the third and fourth embodiments described here is only for the region immediately below the portion of the glass ribbon 4 where the scribe tip 8 is pressed in synchronization with the displacement of the scribe tip 8. In this respect, it is configured to be able to blow air having a higher pressure than other parts, and this point is different from the scribe line processing devices 7 and 17 described above.
And the scribe line processing apparatus according to the third and fourth embodiments of the present invention can be replaced with the scribe line processing apparatus 7 according to the first embodiment of the present invention shown in FIG.

As shown in FIG. 6 (a), the scribe line processing apparatus 27 according to the third embodiment of the present invention is different from the scribe line processing apparatuses 7 and 17 according to the first to second embodiments described above. In S, a blowing device 29 is provided instead of the blowing devices 9 and 19.
FIG. 6A is a cross-sectional view taken along the line CC ′ of the scribe line processing apparatus 27 according to the third embodiment.
The CC ′ line is a line defined along the locus of the scribe chip 8 as shown in FIG.
Note that the scribe line processing device 27 is the same as the configuration of the scribe line processing device 7 according to the first embodiment of the present invention except for the blow device 29, and thus the description thereof is omitted here.

As shown to Fig.6 (a), the blow apparatus 29 is an apparatus which can spray gas with respect to the lower surface of the glass ribbon 4, and is provided with the 1st main-body part 29a.
The first main body portion 29a of the blowing device 29 is a part of the three-divided main body portion, similar to the first main body portion 19a (see FIG. 5A) of the blowing device 19 described above. Since parts other than the first main body portion 29a in the device 29 have the same configuration as the second main body portion 19b and the third main body portion 19c of the blowing device 19, description thereof is omitted here.

  The first main body 29a is similar to the first main body 19a of the blowing device 19 described above (see FIG. 5A) so as to include an area corresponding to the locus drawn by the scribe chip 8 in the scribe section S. It has a parallelogram shape in plan view.

In the first main body 29a, a plurality of gaps 29b, 29b, which are spaces for circulating air, are formed, and a plurality of gaps 29b, 29b, ... communicate with the outside. Are formed on the upper surface of the first main body 29a.
An air source (not shown) such as a blower, a fan, an air pipe, or the like is connected to the gap portion 29b. By sending air into the gap portion 29b with a predetermined pressure by the air source, holes 29c, 29c,.・ It is configured so that air can be ejected from.

And in the scribe line processing apparatus 27, it is set as the structure which selects the space | gap part 29b which supplies air synchronizing with the displacement of the scribe chip | tip 8. FIG. For example, by providing a solenoid valve on the connection path with the air source for each of the gaps 29b, 29b,... And opening only the solenoid valve corresponding to the selected gap 29b, the selected gap Air can be supplied only to the part 29b.
That is, in the scribe line processing device 27, an area 29b immediately below the scribe chip 8 is selected by selecting the air gap 29b communicating with the hole 29c arranged immediately below the scribe chip 8 and supplying air to the air gap 29b. However, air having a higher pressure than other parts is blown.

  Note that, in the scribe line processing device 27, air is blown from below to another portion of the scribe portion S of the glass ribbon 4 other than the portion where air is blown from the first main body portion 29a by another blow device (not shown). In the scribe portion S, the glass ribbon 4 is prevented from being bent.

  And by such a structure, the site | part where the scribe chip | tip 8 is pressed in the glass ribbon 4 is supported by the air layer which has a high pressure compared with the site | part where the scribe chip | tip 8 is not pressed, and a glass ribbon is carried out by the scribe chip | tip 8. The glass ribbon 4 is prevented from being bent in the scribe part S by reliably resisting the pressing force applied to the glass 4.

Also, with such a configuration, the contact pressure of the scribe tip 8 with respect to the glass ribbon 4 can be kept constant.
Then, by maintaining the contact pressure of the scribe tip 8 against the glass ribbon 4 uniformly, the scribe line K2 having a uniform processing depth can be formed.

Further, as shown in FIG. 6B, the scribe line processing apparatus 37 according to the fourth embodiment of the present invention includes the scribe line processing apparatuses 7, 17, and 27 according to the first to third embodiments described above. In contrast, the scribe unit S includes a blow device 39 instead of the blow devices 9, 19, and 29.
FIG.6 (b) is CC 'sectional view taken on the line of the scribe line processing apparatus 37 which concerns on 4th embodiment.
The scribe line processing device 37 has the same configuration as that of the scribe line processing device 7 according to the first embodiment of the present invention except for the blow device 39, and the description thereof is omitted here.

As shown in FIG. 6B, the blow device 39 is a device capable of blowing gas against the lower surface of the glass ribbon 4, and includes a first main body portion 39a.
The first main body portion 39a of the blowing device 39 is a part of the three-divided main body portion, similar to the first main body portion 19a (see FIG. 5A) of the blowing device 19 described above. Since parts other than the first main body portion 39a in the device 39 have the same configuration as the second main body portion 19b and the third main body portion 19c of the blowing device 19, description thereof will be omitted here.

  The first main body 39a corresponds to the trajectory drawn by the scribe chip 8 in the parallelogram-shaped region in plan view where the first main body 19a (see FIG. 5A) of the blow device 19 described above is formed. It can be moved.

A plurality of gaps 39b, which are spaces for circulating air, are formed inside the first main body 39a, and a plurality of holes 39c, 39c... Communicating with the gap 39b and the outside are provided. It is formed on the upper surface of the first main body 39a.
An air source (not shown) such as a blower, a fan, an air pipe, or the like is connected to the gap 39b. By sending air into the gap 39b with a predetermined pressure by the air source, holes 39c, 39c,.・ It is configured so that air can be ejected from.

In the scribe line processing device 37, the first main body 39 a is supported in a displaceable state by a displacement device (not shown), and the scribe chip 8 is directly below the scribe chip 8 in synchronization with the displacement of the scribe chip 8. 8 is configured to be displaced parallel to the displacement direction.
That is, in the scribe line processing device 37, the first main body portion 39 a is displaced so that the first main body portion 39 a is always disposed directly under the scribe chip 8, so that only the region directly under the scribe chip 8 is applied. The air is blown at a higher pressure than other parts.

  Note that, in the scribe line processing device 37, air is blown from below to another portion of the glass ribbon 4 other than the portion where air is blown from the first main body portion 39 a in the scribe portion S. In the scribe portion S, the glass ribbon 4 is prevented from being bent.

  And by such a structure, the site | part where the scribe chip | tip 8 is pressed in the glass ribbon 4 is supported by the air layer which has a high pressure compared with the site | part where the scribe chip | tip 8 is not pressed, and a glass ribbon is carried out by the scribe chip | tip 8. The glass ribbon 4 is prevented from being bent in the scribe part S by reliably resisting the pressing force applied to the glass 4.

Also, with such a configuration, the contact pressure of the scribe tip 8 with respect to the glass ribbon 4 can be kept constant.
Then, by maintaining the contact pressure of the scribe tip 8 against the glass ribbon 4 uniformly, the scribe line K2 having a uniform processing depth can be formed.

  That is, in each of the scribe line processing devices 27 and 37 according to the third and fourth embodiments of the present invention, the first main body portions 29a and 39a of the blow device 29 and the blow device 39 are synchronized with the displacement of the scribe tip 8. Then, air gas is blown onto the lower surface of the glass ribbon 4 at a higher pressure than the other regions in the region immediately below the scribe chip 8.

And by using each scribe line processing apparatus 27 and 37 which has such a structure, in the scribe part S, the contact pressure of the glass ribbon 4 which is plate glass and the scribe chip 8 can be kept constant. .
Thereby, the scribe line K <b> 2 having a uniform processing depth can be processed with respect to the glass ribbon 4.
Furthermore, by using the scribe line processing devices 27 and 37 having such a configuration, the glass ribbon 4 can be efficiently levitated with a small amount of air in the scribe section S, and the scribe line processing device The running cost can be reduced, and as a result, the manufacturing cost of the plate glass can be reduced.

  In the scribing line processing method using the scribing line processing apparatus according to each embodiment of the present invention described above, one main surface is supported by a plurality of transport rollers 5. The conveying direction of the glass ribbon 4 by moving the scribe chip 8 obliquely with respect to the conveying direction X of the glass ribbon 4 while pressing the scribe chip 8 against the upper surface of the glass ribbon 4 while conveying in the horizontal direction. A scribe line K2 orthogonal to X is processed, and the glass ribbon 4 in the scribe portion S, which is a displacement region of the scribe chip 8, is floated and conveyed by blowing gas on the lower surface of the glass ribbon 4. is there.

By adopting the scribe line processing method having such a configuration, the contact pressure between the glass ribbon 4 that is a plate-like glass and the scribe chip 8 can be kept constant in the scribe portion S.
Thereby, it is possible to process the scribe line K <b> 2 having a uniform processing depth with respect to the glass ribbon 4.

  Moreover, the manufacturing method of the plate glass using the scribe line processing apparatus which concerns on each embodiment of this invention mentioned above is the state which supported the glass ribbon 4 on the one main surface with the some conveyance roller 5,5 .... While displacing the scribe chip 8 obliquely with respect to the conveyance direction of the glass ribbon 4 while pressing the scribe chip 8 against the upper surface of the glass ribbon 4 while being conveyed in the horizontal direction, A step of processing the scribe line K2 orthogonal to the conveying direction of the glass ribbon 4, and a step of cleaving the glass ribbon 4 along the scribe line K2 to generate a plate glass, the scribe line K2 being In the processing step, gas is blown onto the lower surface of the glass ribbon 4 at the scribe portion S, which is the displacement region of the scribe tip 8. It is intended to convey floated by attaching.

  Moreover, the manufacturing method of the plate glass which concerns on one Embodiment of this invention is the same height as the height of the glass ribbon 4 when the glass ribbon 4 is conveyed in the scribe part S by several conveyance roller 5,5 .... This is what makes you rise.

And the contact pressure of the glass ribbon 4 and the scribe chip | tip 8 can be kept constant in the scribe part S by employ | adopting the manufacturing method of the plate glass which has such a structure.
Thereby, it is possible to process the scribe line K2 having a uniform processing depth with respect to the glass ribbon 4, and to break the glass ribbon 4 along the scribe line K2, thereby preventing breakage of the plate glass 11, and In addition, it is possible to stabilize the quality of the plate glass 11 by suppressing variations in the shape of the fractured section of the plate glass 11.

  In the present embodiment, the case of forming a sheet glass by the float method is described as an example. However, the method for manufacturing a sheet glass according to the present invention is not limited by the method for forming the glass. In other words, the glass forming method in the method for producing a plate glass according to the present invention may be, for example, an overflow downdraw method, or may be configured to employ other various forming methods.

4 Glass ribbon (plate glass)
5 Conveying roller 7 Scribing line processing device (first embodiment)
DESCRIPTION OF SYMBOLS 8 Scribe chip 9 Blow apparatus 11 Sheet glass 12 Upper pressing roller 13 Side pressing roller 17 Scribe wire processing apparatus (2nd embodiment)
19 Blow device 19a 1st main-body part 19b 2nd main-body part 19c 3rd main-body part 27 Scribe wire processing apparatus (3rd embodiment)
29 Blow device 29a First body portion 37 Scribe wire processing device (fourth embodiment)
39 Blow device 39a 1st body part S Scribe part K2 Scribe wire (thing with uniform processing depth)

Claims (8)

With respect to the sheet glass that is supported on one main surface by a plurality of conveying rollers and is conveyed in the horizontal direction, the scribe chip is pressed against the upper surface of the sheet glass and is displaced obliquely with respect to the sheet glass conveying direction. And a scribe line processing device for processing a scribe line orthogonal to the conveying direction of the plate glass,
In the scribe part which is a displacement area of the scribe chip, the apparatus includes a blow device for blowing gas to the lower surface of the plate glass,
By the blowing device,
At least a part of the lower surface of the plate glass is floated and held by gas pressure,
The scribe line processing apparatus characterized by the above. The scribe part is an area including a rectangular area whose diagonal is a locus of the scribe chip,
The blowing device is
In the first region along the trajectory of the scribe chip in the scribe portion, a first portion that blows gas on the lower surface of the sheet glass;
In a second region that is a region other than the first region in the scribe part, a second part that blows gas on the lower surface of the sheet glass;
Composed of
The gas pressure blown at the first part and the second part is configured to be individually controllable,
The scribe line processing apparatus according to claim 1. The first part of the blowing device is
In synchronization with the displacement of the scribe tip,
In the region directly below the scribe chip, the gas is blown on the lower surface of the sheet glass at a higher pressure than other regions.
The scribe line processing apparatus according to claim 2, wherein: In the scribe part,
An upper contact member that comes into contact with the left and right ends of the sheet glass in the conveying direction from above;
The scribe line processing apparatus according to any one of claims 1 to 3, wherein In the scribe part,
A lateral contact member that is in contact with the left and right ends of the sheet glass in the conveying direction from the side is provided.
The scribe line processing apparatus according to any one of claims 1 to 4, wherein The sheet glass is conveyed in the horizontal direction with one main surface supported by a plurality of conveying rollers, while the scribe chip is pressed against the upper surface of the sheet glass, and the scribe chip is conveyed in the sheet glass conveying direction. Is a scribe line processing method for processing a scribe line orthogonal to the conveying direction of the sheet glass by displacing with respect to the plate glass,
The plate glass in the scribe part which is a displacement region of the scribe chip,
Float and convey by blowing gas on the lower surface of the plate glass,
The scribe line processing method characterized by the above-mentioned. While the glass ribbon is transported in a horizontal direction with a plurality of transport rollers supporting one main surface, the scribe chip is pressed against the glass ribbon transport direction while pressing the scribe chip against the upper surface of the glass ribbon. A step of processing a scribe line perpendicular to the transport direction of the glass ribbon, with respect to the glass ribbon,
Cleaving the glass ribbon along the scribe line to produce a plate glass;
A method for producing a plate glass comprising:
In the step of processing the scribe line,
The glass ribbon in the scribe part which is a displacement region of the scribe chip,
The air is floated and conveyed by blowing gas on the lower surface of the glass ribbon,
The manufacturing method of the plate glass characterized by the above-mentioned. In the scribe part,
The glass ribbon,
Levitating to the same height as the glass ribbon when transported by the plurality of transport rollers,
The manufacturing method of the plate glass of Claim 7 characterized by the above-mentioned.

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