JP2014125419A - Glass plate production apparatus and glass plate production method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass plate production apparatus capable of cutting a glass plate more surely along a cut line by applying flexural stress properly to the cut line, and improving yield.SOLUTION: A glass plate production apparatus includes: a belt conveyor having a belt and a driving device for driving the belt, for conveying a glass plate provided with a cut line on one surface side, while supporting the other surface side facing to one surface side by the belt; and cutting means for cutting the glass plate along the cut line by applying flexural stress to the periphery of the cut line on the glass plate provided with the cut line and being conveyed by the belt conveyor.

Description

  The present invention relates to a glass plate manufacturing apparatus and a glass plate manufacturing method.

  In a glass plate manufacturing apparatus, a glass plate having a desired shape and size is manufactured by forming a glass ribbon by various forming means, cooling the glass ribbon, and then cutting the glass ribbon by the glass plate cutting means. Yes.

  Here, the structural example (sectional drawing) of the glass plate cutting means in the conventional glass plate manufacturing apparatus is shown in FIG. As a glass plate cutting means in a conventional glass plate manufacturing apparatus, a cut line is formed by a cutting line processing means 13 for a glass plate (glass ribbon) 12 being conveyed on the conveying roller 11 in the direction of arrow X in the figure. After that, means for cutting the glass plate by applying a force along the cutting line by the cleaving means 14 has been known (see, for example, Patent Document 1).

JP 2012-96936 A

  However, the transport rollers 11 are arranged at intervals. For this reason, the glass plate (glass ribbon) 12 conveyed on the conveyance roller 11 may bend downward between the conveyance rollers 11 as shown in FIG. Thus, even if it was going to apply bending stress centering on a cut line in the state which the glass plate (glass ribbon) bent, there was a case where force could not be applied appropriately. For this reason, in the conventional glass plate manufacturing apparatus, there existed a problem that a yield and the case where a glass plate cannot be cut | disconnected or a crack and a crack may arise in the direction and position different from a cut line.

  In view of the above-described problems of the conventional technology, the present invention provides a glass plate manufacturing apparatus that can appropriately apply bending stress to a cutting line, cut more reliably along the cutting line, and improve the yield. The purpose is to provide.

  In order to solve the above-mentioned problems, the present invention has a belt and a driving device for driving the belt, and a glass plate provided with a cutting line on one surface side is disposed on the other surface side facing the one surface side. Bending stress is applied to the periphery of the glass conveyor provided with the belt conveyor supported by the belt and the cutting line being conveyed by the belt conveyor, and the glass sheet is cut along the cutting line. And a cleaving means.

  According to the glass plate manufacturing apparatus of the present invention, it is possible to appropriately apply a bending stress to the cutting line, and more reliably cut along the cutting line, thereby improving the yield.

Explanatory drawing of the glass plate cutting means in the conventional glass plate manufacturing apparatus Sectional drawing of the glass plate manufacturing apparatus of 1st Embodiment which concerns on this invention. Sectional drawing in the AA 'line in FIG. Top view around the cleaving means in FIG. Explanatory drawing of the other structural example of the cleaving means shown to FIG. 4A. Explanatory drawing of the other structural example of the cleaving means shown to FIG. 4A. Explanatory drawing of the cleaving means at the time of cleaving in the perpendicular | vertical direction with the conveyance direction of a glass plate in 1st Embodiment which concerns on this invention. Explanatory drawing of the cleaving means at the time of cleaving in the perpendicular | vertical direction with the conveyance direction of a glass plate in 1st Embodiment which concerns on this invention. Sectional drawing around the cleaving means of the second embodiment according to the present invention Top view around the cleaving means of the second embodiment according to the present invention

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments, and the following embodiments are not departed from the scope of the present invention. Various modifications and substitutions can be made.
[First Embodiment]
This Embodiment demonstrates the structural example of the glass plate manufacturing apparatus and glass plate manufacturing method of this invention.

  The glass plate manufacturing apparatus of the present embodiment includes a belt and a driving device that drives the belt, and the glass plate provided with a score line on one surface side is disposed on the other surface side facing the one surface side. Bending stress is applied to the periphery of the glass conveyor provided with the belt conveyor supported by the belt and the cutting line being conveyed by the belt conveyor, and the glass sheet is cut along the cutting line. And cleaving means.

  Moreover, the manufacturing method of the glass plate of the present embodiment includes a cleaving step of cleaving the glass plate by applying bending stress around the cut line of the glass plate provided with a cut line on one side. The cleaving step is performed while the glass plate provided with the cut line on the one surface side is supported by the belt of the belt conveyor and conveyed on the other surface side facing the one surface side. And

  A specific configuration example will be described with reference to FIG.

  FIG. 2 shows a sectional view around the cleaving means of the glass plate manufacturing apparatus of this embodiment.

  As shown in FIG. 2, the glass plate manufacturing apparatus of the present embodiment includes a belt conveyor 21 that conveys the glass plate 12 provided with a cutting line, and a cleaving means 14.

  Each member will be described.

  First, the belt conveyor 21 will be described. The belt conveyor 21 only needs to be capable of transporting a glass plate, and the configuration thereof is not particularly limited. For example, as shown in FIG. 2, the belt 24 is driven by the pulley 24 by rotating the pulley 24 with a driving device (not shown), and the glass plate 12 placed on the upper surface of the belt is conveyed in the direction of arrow X in the figure. It can be configured. The glass plate 12 may be a belt-like glass ribbon or a glass plate cut into a desired shape and size.

  The material, shape, arrangement, etc. of the belt and pulleys are not particularly limited as long as the glass plate 12 can be conveyed. For example, a belt conveyor used in a general production line or the like is used. Can be used. Since the belt 23 preferably has a flexibility that can follow the bending of the glass plate 12 by the cleaving means described later, the Young's modulus of the belt 23 may be equal to or lower than the Young's modulus of the glass plate 12 provided with the cut line. preferable.

  The support member 22 is preferably provided on at least a part of the back side of the belt 23 of the belt conveyor 21 (the side not in contact with the glass plate 21). The range in which the support member 22 is provided is not particularly limited, and is preferably provided to such an extent that the belt does not bend downward due to the weight of the glass plate 21 and the weight of the belt 23. For example, it is more preferable that the support member is provided at least on the back surface portion of the surface facing the glass plate 12 of the belt. By providing the support member in this manner, it is possible to particularly suppress the glass plate 12 from being bent.

  However, it is preferable to configure the portion of the back surface of the belt 23 where the cleaving means 14 is provided and its periphery so as not to hinder the function of the cleaving means 14. For example, at least when the cleaving means 14 is operated, an opening may be formed in the support member on the back side of the belt 23 that comes into contact with the cleaving means 14.

  As will be described later, when the shape of the belt is not flat, the support member can be shaped to match the desired shape of the belt in order to obtain the desired shape of the belt. For example, if the belt shape is curved (the center in the width direction is convex) at the center in the width direction (perpendicular to the transport direction) and higher than both ends, the support member is also centered in the width It can be set as the curved shape where a part is higher than both ends.

  Since the belt 23 and the support member 22 are in direct contact with each other at many portions, when the belt is driven, the belt and the support member are particularly worn due to friction between the belts, and these members need to be replaced depending on the degree of wear. . For this reason, it is preferable to arrange | position a lubricant between both and to send in air and to make a contact range small, to reduce the degree of wear and to make the replacement frequency low.

  2 and 3 exemplify a mode in which the belt conveyor 21 transports the glass plate 12 horizontally. However, the configuration is not limited to this mode, and is inclined according to the configuration of the production line. It can also be.

  For example, the configuration in which the belt conveyor 21 is inclined in the transport direction, that is, for example, in FIG. 2, the right end portion (the front end portion in the transport direction) of the belt conveyor 21 is higher or lower than the left end portion in the figure. It is good also as composition which has.

  Further, the configuration in which the belt conveyor 21 is similarly inclined in the width direction (direction perpendicular to the conveying direction), that is, one end portion in the width direction of the belt conveyor 21 is higher or lower than the other end portion. It is good also as a structure. When the belt conveyor is tilted in this way, depending on the tilt angle, a slip stopper is provided on the surface of the belt facing the glass plate so that the glass plate held on the upper surface does not fall. You can also.

  Next, the cleaving means 14 will be described. The cleaving means 14 is not particularly limited as long as it can apply a bending stress to the periphery of the cut line of the glass plate so as to be cleaved by the cut line provided on the glass plate being conveyed on the belt conveyor 21. It is not something.

  A configuration example of the cleaving means will be described. The cleaving means described here corresponds to the opposing position of the cut line provided on the one surface (upper surface in the figure) side of the glass plate (opposite the one surface side of the glass plate). It is preferable that the other surface side supporting member that supports this portion and the one surface side pressing member that presses two points separated from the cutting line from the one surface side of the glass plate.

  The structure of the cleaving means will be described with reference to FIGS. 3 and 4A. FIG. 3 shows a cross-sectional view taken along the line AA ′ in FIG. 2, and shows only the periphery of the cleaving means in an enlarged manner. 4A shows an enlarged view around the cleaving means viewed from the direction of arrow B in FIG. In FIGS. 3 and 4A, members that are the same as those in the other drawings are given the same numbers.

  As shown in FIG. 3, the cleaving means 14 is a portion (cut line 31) of the glass plate 12 corresponding to the position opposite to the cut line 31 provided on the glass plate 12 being conveyed from the other surface side of the glass plate 12. The other surface side support member 141 that supports the portion) is provided, and the one surface side pressing member 142 that presses the two points separated from the cutting line 31 from the one surface side of the glass plate as indicated by arrows. Can be configured.

  In such a configuration, the other surface side of the portion corresponding to the cut line of the glass plate being conveyed is supported by the fixed other surface side support member, and two points separated from the portion corresponding to the cut line are It is pressed from the one surface side by the one surface side pressing member.

  When bending stress is applied to the glass plate 12 by the cleaving means 14 in this way, bending stress is also applied to the cutting line on the upstream side in the transport direction from the portion of the glass plate 12 where the cleaving means 14 is arranged. It becomes. For this reason, as shown in FIG. 4A, what was the cut line 31 immediately before the cleaving means (for example, the range indicated by 41 in FIG. 4A) is cleaved with the cut line 31 as a boundary. For this reason, as shown in FIG. 3, in the other surface side support member 141 part, not the cutting line 31 but the part by which the glass plate was cleaved, ie, the part in which the cutting line was provided, will pass.

  FIG. 3 shows a state in which the other surface side support member 141 is fixed at a position where the belt conveyor is pushed up, but the position can be displaced between when the glass manufacturing apparatus is in operation and when it is stopped. It can also be configured.

  Here, the other side support member 141 is fixed and pressed from the one side of the glass plate by the one side pressing member 142, but is not limited to this form. For example, the one surface side pressing member 142 can be fixed and pressed from the other surface side of the glass plate by the other surface side supporting member 141, or the other surface side supporting member 141 and the one surface side pressing member 142 can press the glass plate. It can also be set as the structure pressed from both the one surface side and the other surface side. Even in this case, the position of the other surface side support member 141 and the one surface side pressing member 142 can be displaced between when the glass manufacturing apparatus is in operation and when it is stopped.

  Furthermore, in FIG. 4A, although the example which has arrange | positioned the other surface side support member 141 and the one surface side press member 142 in the same position seeing in the conveyance direction of a glass plate is shown, it is not limited to the form which concerns. For example, as shown to FIG. 4B, it can also be set as the structure which has arrange | positioned the one surface side press member 142 in the upstream of the conveyance direction (direction shown by arrow X in the figure) of a glass plate rather than the other surface side support member 141. Further, as shown in FIG. 4C, the one-side pressing member 142 may be arranged downstream of the other-side supporting member 141 in the glass plate transport direction (direction indicated by arrow X in the drawing).

  When the other surface side support member supports from the other surface side of the glass plate, the other surface side support member 141 is configured to support the glass plate 12 via the belt 23 portion of the belt conveyor 21 as shown in FIG. be able to. In addition, although it can also be set as the structure which provides an opening part in the belt of a belt conveyor and the other surface side support member and a glass plate contact directly, the cutting position of a glass plate changes with the shape and size of the glass plate to manufacture. Since there are cases, it is preferable to support the belt conveyor through the belt as described above.

  The shape and material of the other surface side support member 141 and the one surface side pressing member 142 are not particularly limited as long as they can support and press a desired place in the glass plate being conveyed. However, since these members are in contact with the conveying glass plate and the belt conveyor, it is preferable that the members have shapes and materials that do not hinder the conveyance of the glass plate or the driving state of the belt conveyor. Specifically, for example, it is preferable that the glass plate can be supported or pressed while rotating itself. For example, the other side support member 141 and the one side press member 142 support or press the glass plate. The shape of the member of a part can be made into a disk shape or a disk shape whose outer peripheral edge is V-shaped (wedge shape). The other surface side support member 141 and the one surface side pressing member 142 may have the same shape, but may have different shapes.

  Moreover, the material of the other surface side support member 141 and the one surface side pressing member 142 is not particularly limited, but at least contacts (opposes) the glass plate being conveyed so as not to cause wrinkles on the glass plate. It is preferable that the surface is made of a material that does not cause wrinkles on the glass plate even when it comes into contact with the glass plate.

  For example, at least the surface (the surface facing the glass plate) of the other surface side support member 141 and the one surface side pressing member 142 that is in contact with the glass plate is made of a material having a lower Mohs hardness than the glass plate being conveyed. Preferably it is. The other side support member and the one side pressing member can be made of the same material, but may be made of different materials.

  The one-side pressing member 142 is configured to press two points for one cutting line as described above, but the distance from the cutting line to each pressing point is not particularly limited. It is sufficient that the wire is configured so that a desired bending stress can be applied to the wire. For example, the two points to be pressed can be arranged at the same distance from the cut line, but may be arranged at different distances from the cut line. Moreover, since the preferable distance from the cut line of 2 points | pieces to press depends on conditions, such as the thickness of a glass plate, it is preferable that it is comprised so that the position can be changed. In addition, in FIG. 3, although the one-surface side pressing member 142 has described the example comprised from two separated members, it can also comprise from one member provided with two press parts, for example.

  It is preferable that the other surface side support member 141 and the one surface side pressing member 142 are configured to be able to displace a distance in the height direction (a distance represented by L in FIG. 3) between them. By comprising in this way, it becomes possible to respond | correspond also to the glass plate 12 from which thickness differs, and since it becomes possible to adjust the magnitude | size of the bending stress added with respect to the glass plate 12. preferable.

  The cleaving means having the configuration described here can cleave (cut) in an arbitrary direction such as a direction parallel to the conveyance direction of the glass plate or a perpendicular direction.

  First, the cleaving means for cleaving in the direction parallel to the conveyance direction of the glass plate may arrange the other surface side support member 141 and the one surface side pressing member 142 in advance so as to correspond to the position of the cut line of the glass plate. it can. By disposing (cutting) the glass plate 12 arranged in this way and having a cut line formed between the two members by the belt conveyor 21 (so that the position of the cut line corresponds), it can be cleaved (cut).

  Thus, when cleaving along the direction parallel to the conveyance direction of a glass plate, the other surface side support member 141 and the one surface side pressing member 142 are according to the place of the cut line provided in the glass plate to convey. It is preferable that the position can be displaced. Specifically, it is preferable that the position can be displaced to a desired position in the width direction of the glass plate (direction perpendicular to the conveyance direction of the glass plate). This is because it is possible to cope with such a configuration even when manufacturing glass plates having different cutting line positions.

  Moreover, when cleaving (cutting) a plurality of locations along the direction parallel to the conveyance direction of the glass plate, a plurality of cleaving means having the other surface side support member 141 and the one surface side pressing member 142 are provided for one glass plate manufacturing apparatus. A set can also be provided. This is because when a plurality of cut lines are provided on the glass plate to be manufactured, the plurality of cut lines can be cleaved simultaneously.

  Next, the cleaving means for cleaving (cutting) in the direction perpendicular to the conveying direction of the glass plate will be described with reference to FIG. 5A. FIG. 5A is a view of the glass plate 12 being transported by the belt conveyor 21 in the direction of the arrow X in the drawing as viewed from the upper surface (one surface) side. In this case, the other surface side support member 141 and the one surface side pressing member 142 are moved along the dotted line 51 so as to apply a bending stress in the same manner as described above along a cut line (not shown) provided on the glass plate 12. . In addition, although the cutting line is provided perpendicular to the conveyance direction of the glass plate, the glass plate 12 is being conveyed, so that the other surface side support member 141 and the one surface side pressing member 142 are moved. Since the position changes little by little, it is moved diagonally according to this.

  In this case, while the other surface side support member 141 and the one surface side pressing member 142 are moved, as shown in FIG. 3, the other surface side support member and the one surface side pressing member are cut line 31 of the glass plate. It arrange | positions so that bending stress can be applied with respect to. That is, as shown in FIG. 3, the distance in the height direction and the distance in the width direction between the other surface side support member 141 and the one surface side pressing member 142 can appropriately apply a bending stress around the cut line of the glass plate. Is arranged. For this reason, the glass plate can be cleaved (cut) along the cutting line.

  Moreover, as another form, as shown to FIG. 5B, it can be set as the form in which the other surface side support member 141 and the one surface side press member 142 have the length substantially the same as the width direction of the glass plate 12. FIG. Also in this case, the glass plate is conveyed in the direction of arrow X in the figure. Then, at the timing when a not-shown cut line provided on the glass plate 12 passes through the other surface side support member 141 portion, the other surface side of the glass plate and the other surface side support member 141 and / or the one surface side pressing member 142 / Or press from one side of the glass plate. For this reason, it is possible to cleave (cut) at once without applying bending stress over the entire cutting line 31 provided in the width direction of the glass plate and moving the cleaving means in the surface direction of the glass plate. 5B shows the case where the other surface side support member 141 and the one surface side pressing member 142 are longer than the glass plate 12, the present invention is not limited to such a form. Any other support member may be used as long as bending stress can be applied at once without moving the cleaving means in the plane direction of the glass plate across the entire cutting line 31 provided along the width direction of the glass plate. 141 and the length of the one surface side pressing member 142 may be the same as or shorter than the width of the glass plate.

  Although the configuration of the means for cutting (cutting) in the direction parallel to and perpendicular to the conveyance direction of the glass plate has been described, in one glass plate manufacturing apparatus, it is configured to have a cutting means in only one direction. It is also possible to have a cleaving means in both directions.

  In the case of having the cleaving means in both directions, the cleaving order is not particularly limited and can be provided in any order. However, when the glass ribbon is cleaved in the direction parallel to the glass conveying direction, the cleaving process can be performed more stably, and the quality (shape) of the obtained cut surface can be improved. It can be stabilized and good. For this reason, it is preferable to cleave in a direction perpendicular to the conveyance direction of the glass plate after cleaving in a direction parallel to the conveyance direction of the glass.

  In addition, although the form cut | disconnected (cut | disconnected) in the direction parallel or perpendicular | vertical to the conveyance direction of a glass plate has been demonstrated so far, it is not limited to the form which concerns. As described with reference to FIG. 5A, the cleaving means can be cleaved in any direction and shape as long as the cleaving means can be moved. Specifically, a diagonal line or a curve having a certain angle with respect to the glass conveyance direction can also be cleaved by the cleaving means of this embodiment.

  Moreover, also in the glass plate manufacturing method of this embodiment, the said cleaving process can be performed by the cleaving means mentioned above. That is, in the cleaving step, the other surface side support member that supports the portion on the other surface side corresponding to the opposing position of the cut line provided on the one surface side of the glass plate, and two points separated from the cut line By applying a bending stress to the periphery of the cut line of the glass plate with the one surface side pressing member that presses from the one surface side of the glass plate.

  As described above, the cleaving means of the glass plate manufacturing apparatus of the present embodiment and the cleaving process of the glass plate manufacturing method have been described. By having such a configuration, the other side of the glass plate being supported is supported by the belt conveyor. Therefore, the occurrence of bending can be suppressed. And, since the glass plate that is supported as described above and suppresses the occurrence of bending is subjected to cleaving by applying bending stress to the cut line portion as described above, the bending stress is appropriately applied to the cut line portion. In addition, the cutting (cutting) can be more reliably performed along the cutting line. For this reason, the yield of the glass plate to produce can be improved.

  In the glass plate manufacturing apparatus and the glass plate manufacturing method of the present embodiment, as described above, before the glass plate being conveyed reaches (carrys) the cleaving means and the cleaving step, a cutting line is previously formed on the glass plate. Is provided. The cut line will be described below.

  In the glass plate manufacturing apparatus, the cutting line may be provided at a desired position of the glass plate when the glass plate is supplied to the cleaving means, and the means for providing the cutting line is not particularly limited. For example, the glass plate manufacturing apparatus of the present embodiment may include a cut line forming unit that forms a cut line, and the cut line may be formed on the glass plate by the cut line forming unit.

  In this case, the cutting line forming means is not particularly limited as long as it can form a cutting line that can be cut by applying a bending stress. Examples of the cut line forming means include a wheel cutter and a laser. In consideration of cost and the like, it is preferable to use a wheel cutter as the cut line forming means.

  The cutting line forming means can be provided at an arbitrary location of the glass plate manufacturing apparatus, and for example, a conventional transport roller 11 shown in FIG. 1 is provided upstream of the belt conveyor 21 in the glass plate transport direction. A configuration in which the cut line forming means 13 is provided on the roller 11 can also be adopted. Further, as shown in FIG. 2, like the cleaving means 14 described in the present embodiment, the cut line forming means 13 can be arranged on the belt conveyor on the upstream side in the transport direction from the cleaving means 14. In particular, the cut line forming means 13 is provided on the belt conveyor like the latter in order to form a cut line with higher quality, that is, a cut line that can obtain a cleaner cut surface when bending stress is applied. Preferably there is.

  This is because the glass plate on the conveyance roller is curved according to the shape of the surface of the conveyance roller, so it is in a stressed state, and when a cut line is formed in such a stressed state, it is formed In some cases, cracks spread further from the cut line according to the stress. For this reason, when cleaving is performed using such a cut line, the crack or the like may remain on the cut surface. On the other hand, because the glass plate on the belt conveyor is in a state where almost no stress is applied, it is possible to form a high-quality cutting line that does not contain cracks as described above, and when cutting, a finer cut is achieved. You can get a plane. In addition, although the example which provided the cut line formation means 13 and the cleaving means 14 on the same belt conveyor is shown in FIG. 2, it is not limited to such a form, Each means is arrange | positioned on a different belt conveyor. You can also

  In addition, the cutting line formed by the cutting line forming unit as described above is cleaved by applying a bending stress around the cutting line by the cleaving unit, while the cutting line is being transported from the cutting line forming unit to the cleaving unit. In addition, it is preferable that the position of the cutting line is configured so as not to easily deviate from a desired position. For this reason, it is preferable that the cut line forming means and the cleaving means are arranged close to each other, and it is more preferable that the cut line forming means and the cleaving means are arranged on the same belt conveyor. Especially in the case of a cutting line parallel to the conveying direction of the glass plate, the cutting line forming means and the cleaving means are arranged on the same straight line, so that both means are particularly arranged as described above. It is preferable that it is arrange | positioned on the same belt conveyor.

  In the glass plate manufacturing apparatus of the present embodiment, the score line forming means can be configured so that a desired number of score lines can be formed at an arbitrary location on the glass plate. For example, a plurality of score lines can be formed. When forming, it can be set as the structure which has two or more cut line formation means. Moreover, it is preferable that the cut line forming means is configured so that the position can be changed so that the place where the cut line is formed can be selected and changed according to the size of the glass plate to be manufactured.

  Moreover, also in the glass plate manufacturing method of this embodiment, when supplying a glass plate to a cleaving process, the cut line should just be provided in the desired position of the glass plate, and it is especially limited about the process of providing a cut line. Is not to be done. For example, the glass plate manufacturing method of the present embodiment may include a cut line forming step for forming a cut line on the glass plate, and the cut line may be formed on the glass plate by the cut line forming step.

  When the cut line forming step is provided, the cut line forming step can be performed at any stage of the glass plate manufacturing method as in the case of the cut line forming means, and is not particularly limited. In particular, in order to form a cutting line with higher quality, that is, a cutting line that becomes a more beautiful cutting surface when bending stress is applied, the cutting line forming means 13 is provided on the belt conveyor, and cutting is performed on the belt conveyor. It is preferable to perform a line formation process.

  Further, the cutting line formed by the cutting line forming process is cleaved by applying a bending stress around the cutting line in the cleaving process, but the cutting line is cut while being conveyed from the cutting line forming process to the cleaving process. The position is preferably configured so as not to deviate from a desired position. For this reason, it is preferable that the cut line forming means for performing the cut line forming process and the cleaving means for performing the cleaving process are arranged close to each other. For example, it is more preferable that the cut line forming step and the cleaving step are performed on the same belt conveyor.

  Especially in the case of a cutting line parallel to the conveying direction of the glass plate, the cutting line forming means for performing the cutting line forming process and the cutting means for performing the cutting process are arranged on the same straight line. It is preferable that they are arranged as described above, and it is more preferable that they are arranged on the same belt conveyor.

  In the cut line forming process, a desired number of cut lines can be formed at an arbitrary location on the glass plate (on one side). For example, a plurality of cut lines can be formed simultaneously in the cut line forming process. When forming a score line, a plurality of score line forming means can be used. Moreover, it is preferable that the cut line forming means is configured so that the position can be changed so that the place where the cut line is formed can be selected and changed according to the size of the glass plate to be manufactured.

  Although the structural example of the glass plate manufacturing apparatus of this embodiment and the glass plate manufacturing method has been demonstrated, in the glass plate manufacturing apparatus of this embodiment and a glass plate manufacturing method, furthermore, various incidental facilities and processes are provided arbitrarily. You can also. Specifically, for example, a means (process) for producing a glass ribbon, that is, a glass plate raw material melting means (process), for example, a glass plate forming means for forming a molten glass plate into a glass ribbon by a float method or a fusion method ( Step), a cooling means (step) for cooling the formed glass plate, and the like can be provided. In addition, a polishing means (process) for polishing the glass plate surface and the end face can be provided.

  The glass plate manufacturing apparatus and glass plate manufacturing method of the present embodiment described above can be applied regardless of the type and size of the glass plate.

  In particular, in the conventional glass plate manufacturing apparatus provided with the cleaving means on the conveying roller shown in Patent Document 1, when the glass plate becomes thin, the glass plate cannot be cleaved (cut) or at a desired position. In some cases, the glass plate manufacturing apparatus and the glass plate manufacturing method of the present embodiment can more reliably cut (cut) such a thin glass plate. For this reason, it can apply preferably by manufacture of such a thin glass plate, For example, it can use preferably, when the thickness of the glass plate to manufacture is 0.5 mm or less.

Although the glass plate manufacturing apparatus and the glass plate manufacturing method of the present embodiment have been described above, according to the glass plate manufacturing apparatus and the glass plate manufacturing method of the present embodiment, a bending stress is appropriately applied to the cutting line, It is possible to cut more reliably along the cutting line, and the yield can be improved.
[Second Embodiment]
In this embodiment, another configuration example of the cleaving means in the glass plate manufacturing apparatus and the cleaving process in the glass plate manufacturing method described in the first embodiment will be described. Since the configuration other than the cleaving means and the cleaving process is as described in the first embodiment, it is omitted here.

  First, the cleaving means of this embodiment in a glass plate manufacturing apparatus will be described. The glass plate provided with the cut line has one region and another region with the cut line as a boundary. And at least in the part where the cleaving means is provided, the glass plate provided with the cut line is supported by the belt conveyor from one side of the other side, and the glass plate provided with the cut line as the cleaving means It has the structure provided with the press means pressed from the one surface side of a glass plate with respect to other area | regions.

  Here, the structure concerned is demonstrated using FIG. 6, FIG. FIG. 6 is a cross-sectional view taken along the line AA ′ in FIG. 2 across the entire width direction of the glass plate 12, and instead of the cleaving means 14, a pressing means that is a cleaving means of this embodiment. 61A and 61B.

  FIG. 7 shows a view of FIG. 6 viewed from one side of the glass plate 12 (upper surface side in FIG. 6).

  First, the structure of the cleaving means of this embodiment will be described with reference to the cut line 31A. As shown in FIG. 7, the glass plate 12 has one region 62 and another region 63A with the cut line 31A as a boundary. One region 62 is supported by the belt conveyor 21 from the other side.

  For example, in the glass plate manufacturing apparatus, the upstream portion of the portion in which the cleaving means is provided in the glass plate conveyance direction may be supported by the belt conveyor for other regions.

  Then, as shown in FIG. 6 and FIG. 7, by pressing the other region with the pressing means 61A from the one surface side of the glass plate, bending stress can be applied around the cut line of the glass plate, and the cut line 31A. It becomes possible to cleave along. In this case, the glass plate is divided along the cutting line 31A by the bending stress from the pressing means 61A at the portion immediately before reaching the pressing means 61A. For this reason, as shown in FIG. 6 and FIG. 7, when passing through the pressing means 61A, the cut line 31A provided on the glass plate is not a cut line but is provided with a cleaved portion of the glass plate, that is, a cut line. The part will pass.

  FIG. 7 shows an example in which a cut line 31B is also provided. In this case as well, one region 62 is supported by the belt conveyor 21, and the other region 63B is pressed by the pressing means 61B. It can be cleaved along the cut line 31B.

  6 and 7, the cut lines 31 </ b> A and 31 </ b> B are outside the end portion in the width direction of the belt conveyor 21 (direction perpendicular to the conveying direction of the glass plate), that is, the portions not supported by the belt conveyor 21. However, the present invention is not limited to such a form. It is sufficient if bending stress can be applied so that when the other means is pressed by the pressing means 61A and 61B, the cutting lines 31A and 31B can be cleaved by the cutting lines 31A and 31B. In the vicinity of the end in the width direction, it may be arranged in the form.

  When the cleaving means as described here is used, the cross-sectional shape (on the surface perpendicular to the conveying direction of the glass plate) of the surface that contacts the glass plate of the belt conveyor 21 is the center in the width direction as shown in FIG. Is preferably a curved shape (a shape having a convex central portion in the width direction) higher than both end portions. In this case, since the belt conveyor 21 has a shape corresponding to the shape of the support member 22, the shape of the belt conveyor 21 can be set to a desired shape by setting the shape of the support member 22 to a target shape. .

  Since the belt conveyor 21 has a curved shape in which the central portion in the width direction is higher than both ends as described above, the belt conveyor 21 is bent around the cutting line when pressing the other regions 63A and 63B of the glass plate 12 on the belt conveyor 21. It is preferable because stress is more easily applied.

  Next, the cleaving process in the glass plate manufacturing method of this embodiment is demonstrated. The cleaving process of the present embodiment can be performed by using the cleaving means described above in the present embodiment. That is, the glass plate provided with the cut line has one region and another region with the cut line as a boundary. In the cleaving step, the glass plate provided with the cut line has one area supported by the belt conveyor from the other side, and the glass plate is in contrast to the other area of the glass plate provided with the cut line. By pressing from the one surface side, bending stress can be applied around the cutting line of the glass plate.

  According to the cleaving means and cleaving process of the present embodiment described above, the glass plate on the belt conveyor 21 (part of one region 62) does not come into contact with the cleaving means. It is preferable because the generation of wrinkles can be further suppressed.

  Moreover, the cleaving means of the other configuration example can be preferably used when cleaving (cutting) both end portions (ear portions) of the glass plate in the width direction (direction perpendicular to the transport direction). This is usually a portion that cuts and removes both ends of the glass plate (glass ribbon) in the width direction (direction perpendicular to the glass plate conveyance direction), and the pressing means is in contact with only that portion. This is because the generation of wrinkles can be suppressed for the glass plate remaining on the belt conveyor.

13 Cut line forming means 14 Cleaving means 142 One side pressing member 141 Other side supporting member 21 Belt conveyor 31 Cut line 61A, 61B Pressing means 62 One area 63A, 63B Other area

Claims (9)

A belt and a driving device for driving the belt;
A belt conveyor which conveys a glass plate provided with a score line on one side while supporting the other side facing the one side by the belt;
Cleaving means for applying a bending stress to the periphery of the cut line of the glass plate provided with the cut line being conveyed by the belt conveyor, and for cutting the glass plate along the cut line. apparatus. It has a cut line forming means for forming the cut line with respect to the glass plate,
The glass plate manufacturing apparatus according to claim 1, wherein the cut line forming unit and the cleaving unit are disposed on the same belt conveyor. The cleaving means is
The other surface side support member that supports the portion on the other surface side corresponding to the opposing position of the cut line provided on the one surface side of the glass plate;
The glass plate manufacturing apparatus of Claim 1 or 2 provided with the one surface side pressing member which presses two points spaced apart from the said cutting line from the one surface side of a glass plate. The glass plate provided with the cut line has one region with the cut line as a boundary, and another region,
In the portion provided with the cleaving means,
The glass plate provided with the cutting line, the one region is supported by the belt conveyor from the other side,
As the cleaving means,
The glass plate manufacturing apparatus of Claim 1 or 2 provided with the press means pressed from the one surface side of a glass plate with respect to the other area | region of the glass plate in which the said cutting line was provided.   The glass plate manufacturing apparatus according to any one of claims 1 to 4, wherein the Young's modulus of the belt is equal to or less than the Young's modulus of the glass plate provided with the score line. Applying a bending stress to the periphery of the cut line of the glass plate provided with a cut line on one side, and having a cleaving step of cleaving the glass plate;
The cleaving step is performed while the glass plate having a cut line on the one surface side is supported by the belt of the belt conveyor and conveyed on the other surface side facing the one surface side. Production method. Having a cut line forming step of forming the cut line on the glass plate;
The glass sheet manufacturing method according to claim 6, wherein the cut line forming step and the cleaving step are performed on the same belt conveyor. In the cleaving step,
The other surface side support member that supports the portion on the other surface side corresponding to the opposing position of the cut line provided on the one surface side of the glass plate;
The glass plate manufacturing method according to claim 6 or 7, wherein bending stress is applied to the periphery of the cut line of the glass plate by a one surface side pressing member that presses two points separated from the cut line from the one surface side of the glass plate. . The glass plate provided with the cut line has one region with the cut line as a boundary, and another region,
In the cleaving step,
The glass plate provided with the cutting line, the one region is supported by the belt conveyor from the other side,
The bending stress is applied to the periphery of the cut line of the glass plate by pressing from the one surface side of the glass plate against the other region of the glass plate provided with the cut line. Glass plate manufacturing method.

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