WO2017086198A1

WO2017086198A1 - Glass plate scribing method and glass plate scribing device

Info

Publication number: WO2017086198A1
Application number: PCT/JP2016/082948
Authority: WO
Inventors: 衛中井; 英樹田邊; 高宏末若
Original assignee: 日本電気硝子株式会社
Priority date: 2015-11-17
Filing date: 2016-11-07
Publication date: 2017-05-26
Also published as: CN108025940A; CN108025940B; JPWO2017086198A1; KR20180083301A; KR102591883B1; JP7007913B2

Abstract

The present invention is configured such that, when forming a scribe line S by causing a cutter wheel 4 to run along a scheduled cutting section Gx on one surface of a glass plate G while using a support member 3 to support the scheduled cutting section Gx from the other surface side, the cutter wheel 4 is caused to run on the one surface Gc of the scheduled cutting section Gx in a state in which a liquid L has been applied to the surface, and the scheduled cutting section Gx, which is positioned in front of the traveling direction of the running cutter wheel 4, is pressed against the support member 3 by a roller 5.

Description

Glass plate scribing method and glass plate scribing apparatus

The present invention relates to a glass plate scribing method and a glass plate scribing device for forming a scribe line as a starting point for cutting a glass plate by running a cutter wheel on the surface of the glass plate.

As is well known, the production process of a product glass plate usually includes a cutting step of cutting the glass plate from which it is produced. And as one of the methods for cutting a glass plate, cutting by splitting has been widely used. In the cutting by folding, a scribe line that is the starting point of cutting is formed on the glass plate, and then a bending moment is applied to the periphery of the scribe line. Thereby, the median crack contained in a scribe line is developed in the thickness direction of a glass plate, and a glass plate is cut | disconnected.

Here, Patent Document 1 discloses an example of a method for forming a scribe line on a glass plate. In the method disclosed in this document, the glass plate is supported by a support member (a table in the same document) from one surface side, and on the other surface of the glass plate, a portion to be cut (part cut by splitting) A scribing line is formed on the glass plate by running the cutter wheel along.

Japanese Unexamined Patent Publication No. 2014-3293

However, when the method disclosed in Patent Document 1 is used, there are problems to be solved as described below.

That is, the glass plate may be warped due to residual thermal strain or the like generated during the forming process. In such a glass plate, the planned cutting portion on which the cutter wheel will travel tends to float from the support member due to warpage. In addition, since the thinner the glass plate is, the more likely it is to warp, under the current situation where the thinning of the glass plate is promoted, the portion to be cut is particularly likely to float.

Then, when the planned cutting portion is lifted, the cutter wheel that is traveling will jump along this, making it impossible to form a scribe line with an equal depth on the glass plate. For this reason, at the time of cutting by splitting, the cut end surface of the glass plate is meandered, cracks are generated on the cut end surface, chipping or cracking occurs in the glass plate, and the final The defect which the quality of the product glass plate obtained in particular will deteriorate will generate | occur | produce.

Therefore, as a measure to prevent the cutter wheel from bouncing, the pressure that the cutter wheel presses the glass plate at the time of forming the scribe line is increased to press and flatten the planned cutting portion lifted from the support member. Can be considered.

However, when such measures are taken, the wear of the cutter wheel inevitably progresses as much as the pressure increases, and the life of the cutter wheel is shortened. In other words, the traveling distance at the limit of the cutter wheel that can form a scribe line with an equal depth is shortened. For this reason, it is necessary to frequently take measures such as replacing the cutter wheel with a new one, and there is a problem that the manufacturing cost increases and the manufacturing efficiency deteriorates.

This invention made | formed in view of said situation makes it a technical subject to suppress the abrasion of the cutter wheel used for this, and to achieve the lifetime improvement in forming a scribe line in the cutting scheduled part of a glass plate. .

The method according to the present invention, which was created to solve the above-mentioned problems, runs the cutter wheel along the scheduled cutting portion on the other surface while supporting the planned cutting portion of the glass plate from the one surface side with the support member. A scribing method for a glass plate to form a scribe line, wherein the cutter wheel travels on the other surface of the planned cutting portion in a state where the liquid is applied, and is positioned forward in the traveling direction of the traveling cutter wheel. It is characterized by pressing the planned cutting portion against the support member by the pressing member.

According to this method, wear of the cutter wheel can be suppressed by causing the cutter wheel to travel on the other surface of the planned cutting portion where the liquid is applied. In addition, it is assumed that such an effect is obtained because the following actions are obtained by the liquid adhering to the cutter wheel during traveling. That is, it is considered that the wear of the cutter wheel is suppressed due to the action of the liquid suppressing the frictional heat generated in the cutter wheel and the action of cleaning the cutter wheel. Moreover, in this method, the cutting plan part located ahead of the advancing direction of the cutter wheel in driving | running | working is pressed against the support member with the pressing member. Thereby, in the advancing direction front of the cutter wheel, the planned cutting portion is pressed against the support member and is in a flat state. Then, the cutter wheel travels on the other surface of the flattened cutting scheduled portion. Therefore, it is not necessary to take measures to increase the pressure with which the cutter wheel presses the glass plate in order to prevent the cutter wheel from bouncing. As a result, it becomes possible to further suppress wear of the cutter wheel. From the above, according to this method, the wear of the cutter wheel can be suppressed, and the life of the cutter wheel can be extended.

In the above method, as the pressing member, a roller that travels on the other surface along the planned cutting portion precedes the cutter wheel, and a liquid is applied to the other surface of the planned cutting portion by the running roller. preferable.

In this way, the roller has both a function of pressing the planned cutting portion against the support member and a function of applying a liquid to the other surface of the planned cutting portion. Therefore, in addition to the roller as the pressing member, it is not necessary to separately prepare an application means for applying a liquid to the other surface of the scheduled cutting portion. Thereby, it becomes possible to suppress the equipment cost required for forming the scribe line. In addition, since the liquid is applied by the roller that runs ahead of the cutter wheel, the time until the cutter wheel passes through the application area after the roller has applied the liquid can be shortened as much as possible. Thereby, even when a highly volatile liquid is used, the application region can be passed through the cutter wheel before the liquid volatilizes. As a result, the liquid can be reliably attached to the cutter wheel.

In the above method, when starting the formation of the scribe line, after pressing the planned cutting portion against the support member by the roller that has been first brought into contact with the other surface of the planned cutting portion, the cutter wheel is placed on the other surface of the planned cutting portion. It is preferable to make it contact.

In this way, when the cutter wheel comes into contact with the other surface of the scheduled cutting portion, the planned cutting portion is pressed against the support member by the roller abutted before the cutter wheel and becomes a flat state. Yes. For this reason, when the formation of the scribe line is started, it is possible to prevent the cutter wheel from pushing the planned cutting portion lifted from the supporting member into the supporting member side and applying an excessive pressure to the planned cutting portion. As a result, it is possible to suitably avoid the occurrence of defects such as cracks in the glass plate.

In the above method, it is preferable to form a scribe line excluding the outer peripheral edge of the glass plate.

In this way, when a pressure is applied to the outer peripheral end of the glass plate, the glass plate may be broken starting from a crack or the like included in the outer peripheral end. However, if the scribe line is formed excluding the outer peripheral end portion, it is not necessary to run the cutter wheel on the outer peripheral end portion, so that it is inevitably avoided that pressure is applied to the outer peripheral end portion. Is done. Therefore, the possibility that the glass plate breaks can be accurately eliminated.

In the above method, it is preferable that the scribe line is formed from the bottom to the top along the vertical direction with the glass plate in a vertical posture.

This makes it suitable for stabilizing the traveling speed of the cutter wheel. For example, when the scribe line is formed from the top to the bottom along the vertical direction with the glass plate in the vertical position, if the cutter wheel is driven at a constant speed, the influence of gravity is offset. It is necessary to run the cutter wheel while braking the However, if the scribe line is formed from below to above as in the present method, such a need can be eliminated. Also, if the liquid is formed from the lower side to the upper side, it is less likely that the applied liquid will sag and flow out of the region where it should be, as compared with the case where the liquid is formed from the upper side to the lower side. Become. Thereby, it becomes easy to make a cutter wheel run reliably in the application area | region of a liquid.

In the above method, it is preferable to use a liquid having a boiling point of 100 ° C. or lower under atmospheric pressure.

In this way, since the liquid has high volatility, even after the scribe line is formed, the liquid is improperly left on the glass plate to avoid occurrence of a situation where the glass plate is contaminated. It becomes possible.

In the above method, it is preferable to use a liquid containing alcohol as the liquid.

In this way, since the liquid contains alcohol, the volatility of the liquid can be further increased. Thereby, it becomes possible to further improve the effect of preventing contamination of the glass plate.

In the above method, a liquid mixture containing ethanol and water is preferably used as the liquid, and the ratio of ethanol contained in the liquid mixture is preferably 50% or more.

In this way, since the liquid mixture contains highly volatile ethanol, in addition to obtaining the effect of preventing contamination of the glass plate, water is contained in the liquid mixture, and therefore highly flammable. An effect of avoiding ethanol ignition or the like can also be obtained. In addition, although there is a concern that the glass plate is contaminated with water contained in the mixed solution, such a concern is accurately eliminated for the following reason. That is, since the proportion of ethanol contained in the mixed solution is 50% or more, the proportion of water contained in the mixed solution is inevitably suppressed to 50% or less. By suppressing the ratio of water in this way, contamination of the glass plate with water can be avoided as much as possible.

In the above method, the glass plate may have flexibility.

Since a thin glass plate having flexibility is likely to be warped, the cut portion of the glass plate inevitably easily rises from the support member. Therefore, when the glass plate has flexibility, the effect can be effectively utilized by applying the present invention that can prevent lifting of the planned cutting portion.

Moreover, the apparatus which concerns on this invention created in order to solve said subject is a supporting member which supports the cutting plan part of a glass plate from one side, and the other side of a glass plate along a plan cutting part. A scribing device for a glass plate that includes a cutter wheel that travels to form a scribe line, an application unit that applies liquid to the other surface of the cutting scheduled portion before the cutter wheel passes, and a cutter wheel that is traveling And a pressing member that presses the planned cutting portion positioned forward in the traveling direction against the support member.

According to such a configuration, it is possible to obtain the same actions and effects as the matters already described in the description relating to the glass plate scribing method.

In the above configuration, a roller that travels along the planned cutting portion on the other surface preceding the cutter wheel while applying a liquid to the other surface of the planned cutting portion is provided, and the roller includes the coating means and the pressing member. It is also preferable to double.

In this way, it is possible to obtain the same actions and effects as those already described in the description of the glass plate scribing method.

According to the scribing method for a glass plate and the scribing device for a glass plate according to the present invention, it is possible to suppress the wear of the cutter wheel used for forming the scribe line in the planned cutting portion of the glass plate, and the length of the cutter wheel. It is possible to extend the life.

It is a vertical side view which shows the outline of the scribing apparatus of the glass plate which concerns on embodiment of this invention. FIG. 2 is a transverse plan view showing an AA cross section in FIG. 1. In the scribing apparatus of the glass plate which concerns on embodiment of this invention, it is a side view which shows the vicinity of a cutter wheel and a roller. In the scribing apparatus of the glass plate which concerns on embodiment of this invention, it is a front view which shows the vicinity of a cutter wheel and a roller. In an Example, it is a figure which shows the state of abrasion of a cutter wheel. In a comparative example, it is a figure which shows the state of abrasion of a cutter wheel. In an Example, it is a figure which shows the cut end surface of the glass plate after the cutting | disconnection by folding. In a comparative example, it is a figure which shows the cut end surface of the glass plate after the cutting | disconnection by folding. It is a front view which shows the vicinity of a cutter wheel and a roller in the scribing apparatus of the glass plate which concerns on other embodiment of this invention.

Hereinafter, a glass plate scribing apparatus according to an embodiment of the present invention and a glass plate scribing method according to an embodiment of the present invention executed by the glass plate scribing apparatus will be described with reference to the accompanying drawings.

As shown in FIG.1 and FIG.2, the scribing device 1 for glass plates (hereinafter referred to as the scribing device 1) has, as a main component, an upper side portion Ga of a rectangular glass plate G in a vertical posture in the thickness direction. A holding member 2 to be gripped, a support member 3 for supporting the scheduled cutting portion Gx of the glass plate G gripped by the holding member 2 from the one surface Gb side, and the other surface Gc of the glass plate G along the scheduled cutting portion Gx. The cutter wheel 4 that presses the scheduled cutting portion Gx to form a scribe line while traveling from below to above, and supports the planned cutting portion Gx while traveling on the other surface Gc preceding the cutter wheel 4 The roller 5 that presses against the member 3 and applies the liquid L soaked in the rotating peripheral portion 5a to the cutting scheduled portion Gx, and the replenishing device for replenishing the liquid L to the rotating peripheral portion 5a of the roller 5 When, and a supply device 7 for supplying liquid L to the replenishing device 6.

In this scribing apparatus 1, the roller 5 alone has a function as a pressing member that presses the planned cutting portion Gx against the support member 3 and a function as an application means that applies the liquid L to the planned cutting portion Gx. In addition, as the liquid L applied to the to-be-cut portion Gx, a liquid having a boiling point of 100 ° C. or less under atmospheric pressure is used. Examples of such liquid L include alcohols such as methanol, ethanol, 1-propanol, 2-propanol, 2-butanol, 2-methyl-2-propanol, and liquids containing these alcohols. As one specific example, a mixed solution in which ethanol and water are mixed can be mentioned. When using this liquid mixture of ethanol and water as the liquid L, the ratio of ethanol contained in the liquid mixture is 50% or more.

The glass plate G is formed by a down-draw method by a forming device (not shown) disposed above the scribe device 1, and a long glass ribbon descending from the forming device is cut into predetermined lengths. It is a thing. The glass plate G includes ineffective portions Gy that are not required for the final product glass plate at both ends in the width direction (the direction perpendicular to the paper surface in FIG. 1 and the left-right direction in FIG. 2). The effective part Gz which becomes a product glass plate is provided between the two ineffective parts Gy. Then, of the two ineffective portions Gy, the boundary between the ineffective portion Gy on one side and the effective portion Gz, and the boundary between the ineffective portion Gy on the other side and the effective portion Gz extend along the vertical direction, respectively. The scheduled portion Gx is formed. The scribe device 1 is configured to form a scribe line in each of the two scheduled cutting portions Gx with respect to the glass plate G sequentially cut from the glass ribbon. Further, the glass plate G is formed to have a thickness in the range of 200 μm to 2000 μm, for example, and has flexibility. It should be noted that the glass plate G is warped due to residual thermal strain generated during the forming process.

The gripping member 2 includes a chuck portion 2a that opens and closes along the thickness direction of the glass plate G, as indicated by arrows BB in FIG. 1, and holds the glass plate G along with the opening and closing of the chuck portion 2a. And the cancellation thereof. The gripping member 2 is configured to repeatedly execute the following operations (1) to (4).

(1) When the glass plate G cut out from the glass ribbon is loaded into a formation region for forming a scribe line (region where the glass plate G is located in FIG. 1), the chuck portion 2a is closed to close the glass plate. G is gripped. (2) The state where the glass plate G is held is maintained from the start to the end of the formation of the scribe line. (3) When the formation of the scribe line on the glass plate G is completed, the glass plate G is held by a chuck (not shown) of a transfer device (not shown) for transferring the glass plate G from the forming region, and then gripped. The member 2 itself opens the chuck portion 2a and releases the grip of the glass plate G. Thereby, the glass plate G is delivered from the holding member 2 to the transfer device. In addition, a transfer apparatus transfers the glass plate G to a folding device (illustration omitted), after transferring the glass plate G to the cutting area | region (illustration omitted) for performing the cutting | disconnection by folding. (4) After releasing the gripping of the glass plate G, it waits until the glass plate G newly cut from the glass ribbon is carried into the formation region.

The support member 3 can support the entire length of the scheduled cutting portion Gx in the vertical direction, and approaches and separates from the glass plate G as indicated by an arrow CC in FIG. It is possible to move. Further, the support member 3 is configured by an elastic member 3a at a portion that comes into contact with the planned cutting portion Gx, and the one surface Gb of the glass plate G is damaged due to the contact with the support member 3. The elastic member 3a prevents it. For example, a rubber plate can be used as the elastic member 3a. The support member 3 is configured to repeatedly execute the following operations (5) to (8).

(5) When the glass plate G carried into the formation region is gripped by the gripping member 2, the glass plate G approaches the glass plate G from the one surface Gb side and comes into contact with the planned cutting portion Gx to support the planned cutting portion Gx. . As shown in FIG. 2, the support member 3 supports the scheduled cutting part Gx in a state of straddling both the non-effective part Gy and the effective part Gz. (6) From the start to the end of the formation of the scribe line, the state in which the planned cutting portion Gx is supported is maintained. (7) When the formation of the scribe line is completed, the support of the scheduled cutting part Gx is released by separating from the glass plate G. (8) After releasing the support of the scheduled cutting part Gx, the process waits until a new glass plate G is carried into the formation region.

Both the cutter wheel 4 and the roller 5 are held by the cutter unit 8 in a state where the distance D between them is kept constant. Thereby, when forming a scribe line, it becomes possible for the cutter wheel 4 and the roller 5 to drive | work integrally on the other surface Gc of the glass plate G synchronously. Here, in order to achieve the following purposes (a) and (b), the distance D between the cutter wheel 4 and the roller 5 is preferably 100 mm or less, and more preferably 50 mm or less. . (A) The liquid L applied region is passed through the cutter wheel 4 before the liquid L applied to the cutting scheduled portion Gx by the roller 5 volatilizes. (B) The planned cutting portion Gx that has been pressed against the support member 3 by the roller 5 to be in a flat state is prevented from floating again from the support member 3 before passing through the cutter wheel 4.

The cutter unit 8 includes a first cylinder mechanism 9 connected to the cutter wheel 4 and a second cylinder mechanism 10 connected to the roller 5. The second cylinder mechanism 10 is connected to a regulator 11 for adjusting the internal pressure. The load by which the cutter wheel 4 presses the scheduled cutting portion Gx is determined by the magnitude of the internal pressure of the first cylinder mechanism 9. The magnitude of this load is preferably in the range of 3N to 8N. Further, the load by which the roller 5 presses the scheduled cutting portion Gx against the support member 3 is determined by adjusting the internal pressure of the second cylinder mechanism 10 by the regulator 11. The magnitude of this load is preferably in the range of 3N to 15N. Further, by changing the internal pressure of the second cylinder mechanism 10 by the regulator 11, the roller 5 performs a forward operation and a backward operation independently of the cutter wheel 4 as indicated by arrows EE in FIG. 1. It is possible. Thereby, the position of the roller 5 can be moved to a position protruding to the glass plate G side from the cutter wheel 4 or a position retracted to the anti-glass plate G side.

As shown in FIG. 2, the roller 5 is configured to press the planned cutting portion Gx against the support member 3 and apply the liquid L while straddling both the non-effective portion Gy and the effective portion Gz. ing. The liquid L is always infiltrated into the rotation peripheral portion 5a of the roller 5 that rotates about the axis 5b. The rotating peripheral portion 5a is preferably made of a material having excellent water absorption and water retention and having an Asker F hardness of 40 to 100 (more preferably 70 to 95). For example, a large number of fine pores are formed. It can be composed of a polyurethane foam, a polyimide foam, a melamine resin foam, a polyamide foam, a non-woven fabric of heat-resistant fibers such as meta-aramid fibers, and the like. In addition, the width H of the rotating peripheral portion 5a (the width contacting the other surface Gc of the glass plate G) is preferably 3 mm to 30 mm, and more preferably 5 mm to 15 mm. If the width H of the rotating peripheral portion 5a is too small, the cutter wheel 4 may travel away from the application region of the liquid L. On the other hand, if the width H of the rotating peripheral portion 5a is too large, the amount of the liquid L attached to the effective portion Gz increases, and the effective portion Gz tends to get dirty. The roller 5 is a free roller.

The cutter unit 8 is configured to repeatedly execute the following operations (9) to (11).

(9) After the planned cutting portion Gx is supported by the support member 3, the glass plate G is approached from the other surface Gc side, and the held cutter wheel 4 and roller 5 are brought into contact with the planned cutting portion Gx. At this time, by adjusting the internal pressure of the second cylinder mechanism 10, the held roller 5 is projected closer to the glass plate G than the cutter wheel 4, and the roller 5 is moved ahead of the cutter wheel 4. Are brought into contact with the planned cutting portion Gx. That is, the cutter wheel 4 is brought into contact with the scheduled cutting portion Gx after the planned cutting portion Gx is pressed against the support member 3 by the roller 5 in advance to be flat. Thereby, when starting the formation of the scribe line, the cutter wheel 4 prevents the excessive cutting pressure from being applied to the planned cutting portion Gx by pushing the planned cutting portion Gx lifted from the supporting member 3 to the supporting member 3 side. is doing. Here, it is preferable that the projecting dimension of the roller 5 projecting toward the glass plate G from the cutter wheel 4 is in the range of 0.5 mm to 5 mm. The position where the cutter wheel 4 is in contact with the scheduled cutting portion Gx is the starting end of the scribe line. In the present embodiment, a position spaced upward from the lower side Gd of the glass plate G is set as the starting end of the scribe line.

(10) When the cutter wheel 4 and the roller 5 come into contact with the scheduled cutting portion Gx, the inner pressure of the first cylinder mechanism 9 and the second cylinder mechanism 10 is kept constant, and as shown by the arrow F in FIG. Start moving. With this upward movement, as shown in FIG. 3 a, the roller 5 presses the scheduled cutting portion Gx against the support member 3 in front of the traveling direction of the cutter wheel 4 during traveling. Further, as shown in FIG. 3b, the liquid L soaked into the rotating peripheral portion 5a of the roller 5 is applied to the cutting scheduled portion Gx. Then, following the roller 5, the cutter wheel 4 travels in the liquid L application region (the region where cross-hatching is applied in the figure). Thereby, the scribe line S is formed along the scheduled cutting part Gx. In the present embodiment, a position spaced downward from the upper side portion Ga of the glass plate G is the end of the scribe line S. That is, in this embodiment, the scribe line S is formed by excluding the upper side portion Ga and the lower side portion Gd that form a part of the outer peripheral end portion of the glass plate G.

(11) When the formation of the scribe line is completed, as shown by a two-dot chain line (imaginary line) in FIG. 1, the scribe line is moved away from the glass plate G and then stopped. During the stop, the replenishing device 6 receives the replenishment of the liquid L from the revolving peripheral portion 5a of the roller 5, and soaks the liquid L into the revolving peripheral portion 5a. When the replenishment of the liquid L is completed, the liquid L moves downward and waits until a new glass plate G is carried into the formation region.

The replenishing device 6 is fixedly installed at a fixed point, and is configured to replenish the rotating peripheral portion 5a with the liquid L by spraying the liquid L from above toward the rotating peripheral portion 5a of the roller 5. Yes. For example, an electromagnetic valve can be used as the replenishing device 6. The time during which the replenishing device 6 sprays the liquid L toward the rotating peripheral portion 5a and the amount of the liquid L to be sprayed can be arbitrarily set.

The supply device 7 has a tank-like configuration for storing the liquid L, and is connected to the replenishing device 6 via the flow path 12 for the liquid L. Further, the supply device 7 is also connected to the flow path 13 of the air K, and the liquid L can be sent to the replenishment device 6 through the flow path 12 by the pressure of the air K flowing into the supply device 7 through the flow path 13. It has become. In addition, as the flow path 12 and the flow path 13, a hose etc. can be used, for example.

Hereinafter, the main effect | action and effect are demonstrated about the scribing method of the glass plate which concerns on embodiment of this invention which said scribing apparatus 1 performs.

According to the scribing method of the glass plate, the cutter wheel 4 can be prevented from being worn by the cutter wheel 4 traveling on the other surface Gc of the cutting scheduled portion Gx in a state where the liquid L is applied. Further, the cutting target portion Gx located in front of the traveling direction of the cutter wheel 4 that is traveling is pressed against the support member 3 by the roller 5, so that the other surface Gc of the cutting target portion that has become flat is placed on the cutter wheel 4. It is possible to run. This eliminates the need to take measures to increase the pressure with which the cutter wheel 4 presses the glass plate G in order to prevent the cutter wheel 4 from bouncing during traveling. Therefore, wear of the cutter wheel 4 can be further suppressed. From the above, it is possible to extend the life of the cutter wheel 4.

As an example of the present invention and a comparative example, a scribe line is formed on a glass plate under the following conditions (one condition for each of the example and the comparative example), and about the state of wear of the cutter wheel used for this. Verification was performed.

First, the scribe line formation conditions in the examples will be described.

In the examples, scribe lines were formed on the glass plate in the same manner as in the above embodiment. The glass plate used for forming the scribe line is a glass plate (product name: OA-10G) manufactured by Nippon Electric Glass Co., Ltd. The dimensions (vertical dimension x width dimension x thickness dimension) of the glass plate are 2580 mm x 2260 mm x 0.5 mm. The cutter wheel used was a diamond tip (diameter: 3 mm, blade edge angle: 125 °). As the roller, a roll-shaped polyurethane foam (Asker F hardness: 81, porosity: 80%, tensile strength 1.5 MPa) was used. The width of the rotating peripheral portion of this roller (the width that comes into contact with the other surface of the glass plate) is 8 mm. Ethanol (boiling point: 78.3 ° C.) was used as the liquid.

The load with which the cutter wheel presses the planned cutting portion was constant at 4N. The load with which the roller presses the planned cutting portion against the support member was 7N. The scribe line was formed with the position spaced 15 mm upward from the lower side of the glass plate as the starting end and the position spaced 15 mm downward from the upper side of the glass plate as the end. The speed at which the cutter wheel and the roller traveled from below to above along the planned cutting portion was set to 300 mm / s. The distance between the cutter wheel and the roller was 30 mm. Under the above conditions, scribe lines were continuously formed on a large number of glass plates without replacing the cutter wheel (new article).

Next, the scribe line formation conditions in the comparative example will be described. In the description of the formation conditions in the comparative example, only differences from the formation conditions in the above-described embodiment will be described.

In the comparative example, the roller was removed from the scribing device for the glass plate. That is, the pressing of the part to be cut by the roller to the support member and the application of the liquid to the part to be cut by the roller were not performed. Moreover, the initial value of the load with which the cutter wheel presses the planned cutting portion was set to 4N, which is the same value as in the above-described example. Then, the formation of the scribe line was started under this pressure, and when it became impossible to form the scribe line having an equal depth, the load was increased by 1N each time. Under the above conditions, scribe lines were continuously formed on a large number of glass plates without replacing the cutter wheel (new article).

FIG. 4a is an enlarged view showing the cutting edge of the cutter wheel whose total travel distance has reached about 600 km as a result of continuing to form the scribe line in the embodiment. On the other hand, FIG. 4b is an enlarged view showing the cutting edge of the cutter wheel whose total travel distance has reached about 10 km as a result of continuing to form the scribe line in the comparative example. Comparing these figures, in the example, the wear of the blade edge is suppressed more than in the comparative example, although the total traveling distance of the cutter wheel has reached about 60 times that in the comparative example. I understand.

FIG. 5a is a diagram showing a cut end surface of a glass plate cut by folding after forming a scribe line with a cutter wheel having a total travel distance of about 600 km in the embodiment. On the other hand, FIG. 5b is a view showing a cut end face of a glass plate cut by folding after forming a scribe line with a cutter wheel having a total travel distance of about 10 km in the comparative example. Comparing these figures, it can be seen that cracks are generated on the cut end face in the comparative example, whereas a clean cut end face without cracks is obtained in the example. This suggests that in the example, even when the total travel distance of the cutter wheel reached about 60 times that of the comparative example, it was possible to form a scribe line having an equal depth.

From the results of the above examples and comparative examples, according to the glass plate scribing apparatus and the glass plate scribing method according to the present invention, a cutter used for forming a scribe line in the planned cutting portion of the glass plate It is presumed that the wear of the wheel can be suppressed and the life of the cutter wheel can be extended.

Here, the glass plate scribing method and the glass plate scribing apparatus according to the present invention are not limited to the aspect and configuration described in the above embodiment. In the above-described embodiment, the roller unit has both a function as a pressing member that presses the planned cutting portion against the support member and a function as an application unit that applies liquid to the planned cutting portion. The means may be provided separately. For example, as illustrated in FIG. 6, the liquid 5 is applied to the planned cutting portion Gx by spraying the liquid L while moving the roller 5 only as a pressing member and moving in parallel with the direction in which the planned cutting portion Gx extends. Alternatively, the nozzle 14 may be provided as a coating means. In the form shown in FIG. 6, the nozzle 14 sprays the liquid L toward the scheduled cutting portion Gx located between the running roller 5 and the cutter wheel 4, but the roller 5 travels forward. The liquid L may be sprayed toward the scheduled cutting portion Gx located at the position. Furthermore, as a pressing member, it is not always necessary to use a roller, and a roller can be used as long as it can press a planned cutting portion located in front of the traveling cutter wheel in the traveling direction against the support member. it can.

In the above embodiment, the scribe line is formed along the vertical direction (specifically, the scribe line is formed from the bottom to the top), but this is not restrictive. For example, the present invention can be applied to the case where scribe lines are formed along the width direction of the glass plate. As one specific example, the present invention is applied to a case where a scribe line is formed along the width direction of a glass ribbon (band-shaped glass plate) that is descending from a molding apparatus that performs a downdraw method. It is possible. In this case, it is preferable that the rotating peripheral part of the roller is composed of a nonwoven fabric of heat-resistant fibers (such as meta-aramid fibers). The reason for this is to suppress as much as possible the deterioration of the rotating peripheral part due to the heat of the glass ribbon.

In the above embodiment, the liquid is replenished from the replenishing device to the rotating peripheral portion of the roller every time the formation of the scribe line is finished once, but the present invention is not limited to this. Each time the formation of the scribe line is completed a predetermined number of times (a plurality of times), the replenishing device may replenish the liquid to the rotating peripheral portion of the roller.

1 Scribing device for glass plate 3 Support member 4 Cutter wheel 5 Roller (pressing member)
14 Nozzle G Glass plate Gb One side Gc The other side Gx Cutting planned part S Scribe line L Liquid

Claims

A scribing method for a glass plate that forms a scribe line by running a cutter wheel along the planned cutting portion on the other surface while supporting the planned cutting portion of the glass plate from one surface side,
The cutter wheel is caused to travel on the other surface of the planned cutting portion in a state where the liquid is applied, and the planned cutting portion positioned forward in the traveling direction of the traveling cutter wheel is pressed against the support member by a pressing member. A scribing method for a glass plate.
As the pressing member, a roller that travels on the other surface along the planned cutting portion preceding the cutter wheel is used, and the liquid is applied to the other surface of the planned cutting portion by the traveling roller. The method for scribing a glass plate according to claim 1.
When the formation of the scribe line is started, the cutter wheel is pressed against the support member by the roller previously brought into contact with the other surface of the scheduled cutting part, and then the cutter wheel is moved to the other part of the scheduled cutting part. The glass plate scribing method according to claim 2, wherein the glass plate scribing method is brought into contact with the surface.
The scribing method for a glass plate according to any one of claims 1 to 3, wherein the scribe line is formed excluding an outer peripheral end portion of the glass plate.
The method of scribing a glass plate according to any one of claims 1 to 4, wherein the scribe line is formed from the bottom to the top along the vertical direction with the glass plate in a vertical posture.
6. The glass plate scribing method according to claim 1, wherein a liquid having a boiling point of 100 ° C. or lower under atmospheric pressure is used as the liquid.
7. The glass plate scribing method according to claim 1, wherein a liquid containing alcohol is used as the liquid.
The glass plate according to any one of claims 1 to 7, wherein a liquid mixture containing ethanol and water is used as the liquid, and a ratio of ethanol contained in the liquid mixture is 50% or more. Scribe method.
The glass plate scribing method according to any one of claims 1 to 8, wherein the glass plate has flexibility.
A glass plate scriber comprising: a support member that supports a planned cutting portion of the glass plate from one side; and a cutter wheel that runs along the planned cutting portion on the other side of the glass plate to form a scribe line. A device,
Application means for applying a liquid to the other surface of the scheduled cutting portion before the cutter wheel passes, and a pressing member that presses the planned cutting portion positioned forward in the traveling direction of the cutter wheel during traveling against the support member. A scribing device for a glass plate, comprising:
While applying the liquid on the other surface of the planned cutting portion, the roller travels along the planned cutting portion on the other surface preceding the cutter wheel,
The said roller serves as the said application means and the said pressing member, The scribing apparatus of the glass plate of Claim 10 characterized by the above-mentioned.