JP5123501B2 - Sheet glass cutting method and apparatus - Google Patents

Description

The present invention, after performing the first step of a cut line extending outwardly from one surface thereof to the plate glass material from multiple several points of the cutting line and該切disconnection of predetermined shape connected to an endless, the plurality of notches The present invention relates to a sheet glass cutting method for performing a second step of heating the sheet glass material at a portion corresponding to a line to cut the sheet glass material along the cutting line, and an improvement of a sheet glass cutting apparatus for performing the cutting method. .

For example, in order to obtain a rearview mirror for an automobile, a sheet glass material formed larger than the final shape is heated and bent, and then the cutting line having a predetermined shape that extends endlessly and outward from a plurality of circumferential directions of the cutting line. The extending cut line is put into the plate glass material, and the plate glass material is heated at the part corresponding to each cut line, so that cracks generated from the cut line are applied to the entire circumference along the cut line to obtain a plate glass of a predetermined shape. Thus, for example, Patent Document 1 discloses a plate glass cutting method in which a warped portion due to internal distortion remaining in an outer peripheral portion at the time of bending of a plate glass material is removed.
JP-A-2-204337

  However, in what was disclosed by the said patent document 1, after putting a cutting line and several cutting lines in the concave surface which is one surface of the curved sheet glass material, a plate glass raw material is made from the said concave surface side in the part corresponding to each cutting line. Heating. For this reason, the weak surface damaged by the incision is heated, and there is a problem that undesired chipping occurs around the cutting line due to thermal shock.

  The present invention has been made in view of such circumstances, and appropriately performs the plate glass cutting method capable of preventing the occurrence of chipping due to heating, and the plate glass cutting method so as to shorten the processing time. An object of the present invention is to provide a sheet glass cutting device that can be used.

To achieve the above object, an invention according to claim 1, an incision line extending outwardly from one surface thereof to the plate glass material from multiple several points of the cutting line and該切disconnection of predetermined shape endlessly continuous first A plate glass cutting method for cutting a sheet glass material along the cutting line by performing a second step of heating the sheet glass material at a portion corresponding to the plurality of cut lines after performing the step 1. A plate glass cutting device provided with a support table for positioning and mounting the plate glass material and a plurality of heating nozzles fixedly arranged around the support table is used for the plate glass material that has finished the first step. The second step is such that hot air blown from the plurality of heating nozzles is applied to the sheet glass material from below with the central portion positioned and mounted on the support base with the one surface facing upward. The hot nozzle is formed at the upper end of the heating nozzle to blow the hot air upward, and a pair of guide plate portions extending upward from both side edges of the hot air port and facing each other. These guide plate portions are each formed in a triangular shape whose width is narrowed upward .

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the elongated hot air vent is spaced outward from the cutting line in a plan view and in the circumferential direction of the cutting line. It extends along, and is arrange | positioned so that the said cut line may be crossed.

Further, the invention according to claim 3 , after executing the first step of putting a cutting line of a predetermined shape continuous in an endless manner and a cutting line extending outward from a plurality of locations of the cutting line into the plate glass material from the one surface side, Sheet glass cutting for executing a sheet glass cutting method for cutting a sheet glass material along the cutting line by performing a second step of heating the sheet glass material from the other surface side at portions corresponding to the plurality of cut lines. an apparatus, wherein Upon performing the second step, the first step and the support platform for positioning mounted to the central portion of the finished glass sheet material to the one surface upwardly, around the support table and a plurality of heating nozzles for fixedly disposed blowing hot air from below the plate glass material in the in the upper end of the heating nozzle, hot air for blowing the heated air upward And a pair of guide plate portions that extend upward from both side edges of the hot air vent and face each other, and the guide plate portions are each formed in a triangular shape that decreases in width toward the upper side. characterized in that that.

According to a fourth aspect of the present invention, in addition to the configuration of the third aspect of the invention, the elongated hot air vent is spaced outward from the cutting line in a plan view and in the circumferential direction of the cutting line. It extends along, and is arrange | positioned so that the said cut line may be crossed.

In addition to the configuration of the invention described in claim 3 or 4 , the invention described in claim 5 further includes a conveying means for holding and unloading the plate glass after the completion of the second step. Is provided with a fragment forcible exclusion mechanism that exerts a pressing force on the sheet glass material from above from outside the cutting line.

Further, the invention according to claim 6 is characterized in that, in addition to the configuration of the invention according to any one of claims 3 to 5, a vibrator for applying vibration to the support base is attached to the support base.

According to the present invention, after the first step of putting a cutting line and a plurality of cutting lines from the one surface side into the bent sheet glass material, the sheet glass material is heated from the other surface side at a portion corresponding to each cutting line. Therefore, the thermal shock is not directly applied to each cutting line, and there is no chipping around the cutting line.

Further, it is possible to immediately start to open the heating by the heating nozzle according to position placing the glass sheet material on the support base, it is possible to shorten the machining time.

Moreover, when the plate glass material is cut along the cutting line by heating, even if the fragments fall to the hot air outlet side, the broken pieces will slide down by the triangular guide plate, and the hot air outlet will be blocked by the fragments. Can be prevented.

According to the invention of claim 5, as both had been left debris caught by heating, by exerting a pressing force by debris preemption mechanism, it is possible to reliably remove the debris.

Furthermore, according to invention of Claim 6 , it can prevent more reliably that a defective article arises by applying a vibration with the vibrator to the plate glass raw material on the support stand heated along a cutting line. In other words, since the cutting line extends over a relatively long distance, the cutting depth due to internal stress tends to vary, and sufficient self-cutting is insufficient in the portion where the penetration of cutting is slow when forced strain is generated by heating. Therefore, there is a possibility that so-called cracks (a state in which the corners of the clam pattern are missing) may occur, resulting in a defective product, but by applying vibration, self-cutting penetration due to internal stress is promoted and necessary self Cutting penetration can be obtained and the occurrence of the above-mentioned cracks can be prevented, and the occurrence of defective products can be more reliably prevented.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings.

  1 to 8 show a first embodiment of the present invention, FIG. 1 is a perspective view showing a part of a plate glass cutting device, and FIG. 2 is a plate glass cutting device viewed from the direction of arrow 2 in FIG. FIG. 3 is a view showing a plate glass cutting device along line 3-3 in FIG. 2, FIG. 4 is a view taken along line 4-4 in FIG. 3, and FIG. FIG. 6 is a view showing a sheet glass cutting device taken along line 6-6 in FIG. 5, FIG. 7 is a perspective view of a heating nozzle, and FIG. 8 is line 8-8 in FIG. It is sectional drawing.

  First, in FIG. 1 and FIG. 2, this sheet glass cutting device has a base 12 that extends straight from the carry-in table 11, and on the base 12, positioning regions S 1, in order from the carry-in table 11 side, The shape cutting region S2, the temporary placement region S3, the heat removal region S4, and the carry-out table 13 are set at equal intervals, and a slit 14 is provided at the center in the width direction of the base 12 over its entire length in the longitudinal direction.

  A glass material 15 is carried into the carry-in table 11 from a bending furnace 10. In the bending furnace 10, for example, a plate glass material 15 formed larger than the final shape of the mirror in order to obtain an automobile rearview mirror. As shown in FIG. 2, the bending glass 10 is obtained by bending a sheet glass material 15 that is bent into a quadrangular shape with four corners rounded.

  A positioning support base 17 is provided on the base 12 in the positioning region S1, and the positioning support base 17 has a circular opening 18 located in the center and the slit 14 corresponding to the slit 14. A guide hole 19 extending from the opening 18 on both sides is provided.

  In addition, the sheet glass material 15 placed on the positioning support table 17 is pressed from the periphery around the positioning support table 17 so that the center position of the sheet glass material 15 matches the center position of the opening 18. A plurality of pressing members 20 for positioning the plate glass material 15 with its concave surface side as an upper side are arranged, and these pressing members 20 are used for the cylinders 21 fixedly arranged on the lower surface of the positioning support base 17. Moves by telescopic operation.

  Referring also to FIG. 3, in the shape cutting region S <b> 2, the base plate 12 is recessed while being bent corresponding to the bent shape of the plate glass material 15 so as to place the plate glass material 15 with the convex surface side downward. A mounting table 24 having a mounting surface 23 on the upper surface is provided, and this mounting table 24 also has a circular opening 25 located at the center and both sides from the opening 25 corresponding to the slit 14. An extending guide hole 26 is provided.

  On the side of the mounting table 24 in the shape cutting area S2, a robot 28 having an arm 27 that can move between an upper position of the mounting table 24 and a position retracted from the upper side of the mounting table 24 to the side. 4 is placed on one surface of the glass sheet material 15 positioned and placed on the mounting table 24 with the concave surface facing upward, that is, the concave surface, by a carbide cutter 29 attached to the tip of the arm 27 of the robot 28. As shown in FIG. 2, a predetermined shape that is connected in an endless manner, for example, a substantially rectangular cutting line 30 rounded at four corners, is inserted, and a plurality of circumferential directions of the cutting line 30 such as four corners outward. Cut lines 31 extending in the direction are inserted.

  By the way, the movement of the sheet glass material 15 between the loading table 11 and the positioning area S1 and between the positioning area S1 and the shape cutting area S2 is performed by the first conveying means 34. The first conveying means 34 A rail 35 laid along the slit 14 so as to be positioned below the base 12 between the carry-in base 11 and the shape cutting area S2, and a movable carriage capable of reciprocating on the rail 35 36, a cylinder 37 provided on the moving carriage 36 with an axis extending vertically, a support arm 39 having a central portion connected to the tip of a rod 38 protruding upward from the cylinder 37, and the support arm 39, suction mechanisms 40, 40 provided at both ends in the longitudinal direction.

  The support arm 39 has a length corresponding to the length between the loading table 11 and the positioning region S1, and between the positioning region S1 and the shape cutting region S2, and is disposed below the slit 14. The suction mechanism 40 has a suction cup 41 at the uppermost end that can suck the central portion of the convex surface of the plate glass material 15, and a hose 42 for switching pressure reduction and pressurization between the suction cup 41 and the plate glass material 15. Are connected to the suction mechanism 40.

  Thus, the first transport means 34 has a position where one of the suction mechanisms 40 corresponds to the loading table 11 and the other suction mechanism 40 corresponds to the positioning region S1 and one of the suction mechanisms 40. Can be reciprocated between the position corresponding to the positioning region S1 and the other suction mechanism 40 to the position corresponding to the shape cutting region S2, and the expansion and contraction of the cylinder 37 and the suction by the suction mechanism 41 of the suction mechanism 40. The sheet glass material 15 heated and bent by the suction release is placed on the positioning support table 17 in the positioning region S1 from the carry-in table 11, and the plate glass material positioned on the positioning support table 17 in the positioning region S1. The process of positioning 15 on the mounting table 24 in the shape cutting area S2 is executed simultaneously.

  Referring also to FIG. 5, in order to temporarily place the sheet glass material 15 in which the cutting line 30 and the plurality of cutting lines 31 are put in the shape cutting area S <b> 2 on the base 12 in the temporary placing area S <b> 3. The temporary placement table 43 is provided.

  A support wall 44 having a square shape in plan view is provided on the base 12 in the heat removal region S4, and a cutting line 30 and a plurality of cut lines 31. A support table 45 for positioning and placing the central portion of the sheet glass material 15 that has been placed and transported from the temporary table 43 with the concave surface upward is disposed. On the support table 45, a sheet glass material is placed. An annular elastic support portion 46 that elastically contacts the lower surface, that is, the convex surface of 15, protrudes so as to form a concave portion 47 in the elastic support portion 46. Moreover, the support base 45 is fixed to the tip of a support cylinder 48 fixed to the support wall 44, and the plate glass material 15 abuts against the elastic support part 46 on the support cylinder 48 and the support base 45. In this state, a pressure reducing passage 49 is provided for reducing the pressure in the concave portion 47 and adsorbing and supporting the sheet glass material 15 toward the elastic support portion 46.

A plurality of, for example, four heating nozzles 50 for applying hot air to the plate glass material 15 on the support table 45 from below are fixed to the support wall 44 around the support table 45. 6, at a predetermined position corresponding to the cut lines 31 of the plate glass material 15 on the support base 45 (that is, away from the cutting line 30 in a plan view and the circumferential direction of the cutting line 30) Extending so as to intersect with the cut line 31) .

  In FIG. 7, the heating nozzles 50 extend in a direction orthogonal to the cut lines 31, and are opposed to each other by a pair of first side plates 51 and the first side plates 51. A pair of second side plates 52 is formed in a square tube shape, and upper portions 52a of the second side plates 52 are formed in a triangular shape so that the width becomes narrower toward the upper side. The upper ends of the side plates 51 are formed to be inclined plate portions 51a that are inclined corresponding to the upper shape of the second side plates 52.

  Thus, the upper end portion of the heating nozzle 50 is long in the direction perpendicular to the cut line 31 between the upper inclined plate portion 51a of the first side plate 51 and the upper portion 52a of the second side plate 52. A rectangular hot air vent 53 is formed, and hot air is blown upward from the hot air vent 53. A pair of guide plate portions 54, 54 extending upward from the side edge of the hot air vent 53 and facing each other are provided at the upper end portion of the heating nozzle 50 from the upper end of the inclined plate portion 51 a. The guide plate portions 54 are provided so as to protrude upward, and the guide plate portions 54 are formed in a triangular shape whose width decreases toward the top.

  Thus, the plate glass material 15 is in a portion corresponding to each cut line 31 of the bent plate glass material 15 as shown in FIG. 8, and the other side opposite to the one side where the cut line 30 and the cut line 31 are put. It is heated by the heating nozzles 50 ... from the convex side which is a surface. At this time, the cracks generated from the respective cut lines 31... By heating will extend over the entire circumference of the cutting line 30, and as shown by the chain line in FIG. 6 and FIG. It peels from the plate glass raw material 15 as the broken piece 15a ..., and it becomes possible to obtain the plate glass 16 (refer FIG. 2) of a predetermined shape by it.

  By the way, the movement of the plate glass material 15 and the cut plate glass 15 between the temporary placement region S3 and the heat removal region S4 and between the heat removal region S4 and the cradle 13 is performed by the second conveying means 56. The second transport means 56 extends vertically from a rail 57 positioned above the base 12 between the temporary placement region S3 to the carry-out base 13, a movable carriage 58 that can reciprocate on the rail 57, and the rail 57. Cylinders 59, 59 provided on both ends in the longitudinal direction of the moving carriage 58 with an axis, and suction mechanisms 61, 61 elastically supported floating at the tips of rods 60, 60 projecting downward from the cylinders 59, respectively. With.

  A support frame 62 supported by a plurality of columns 63 is provided between the temporary placement region S3 and the carry-out table 13 above the base 12 and the rail 57 is provided on the support frame 62. . The movable carriage 58 movable along the rail 57 has a length corresponding to the length between the temporary placement area S3 and the heat removal area S4 and between the heat removal area S4 and the carry-out table 13. . Further, the suction mechanism 61 has a suction cup 64 capable of sucking the plate glass material 15 and the central portion on the concave surface side of the cut glass sheet 16 at the lowermost end, and is located between the suction cup 64 and the plate glass material 15 and the plate glass 16. Are connected to the suction mechanism 61.

  Thus, the second conveying means 56 has a position where one of the two suction mechanisms 61... Corresponds to the temporary placement region S3 and the other suction mechanism 61 corresponds to the heat removal region S4, and the two suction mechanisms 61. The one 61 is made to correspond to the heat removal area S4 and the other suction mechanism 61 can be reciprocated between the position corresponding to the carry-out base 13, and the expansion and contraction operation of the cylinders 59 and the suction cups 64 of the suction mechanism 61. The step of placing the plate glass material 15 from the temporary placement region S3 on the support base 45 in the heat removal region S4 by the suction and suction release by the step, and the heat removal region of the plate glass 16 that has been cut off in the heat removal region S4 The process of mounting on the carry-out stand 13 from S4 is performed simultaneously.

  Further, when one of the adsorption mechanisms 61 is made to correspond to the temporary placement region S3, the lower end of the rod 60 provided in the cylinder 59 at the position corresponding to the heat removal region S4 is heated by the heat removal region S4. However, when the broken pieces 15a are still caught, a broken piece forcibly removing mechanism 66 that applies a pressing force to the sheet glass material 15 from above is provided outside the cutting line 30.

  The fragment forcibly removing mechanism 66 has an axis extending vertically corresponding to four circumferential directions of the plate glass material 15 and is supported by the lower end of the rod 60, and protrudes downward from the cylinder 67. And the pressing plate 69 provided at the tip of the rod 68 to be moved, and by the extension operation of the cylinder 67, the outer side of the cutting line 30 of the plate glass material 15 on the support base 45 in the heat removal region S4. When a pressing force is applied to the pressing plate 69..., Fragments 15 a... Remaining without being dropped after heating by the heating nozzles 50 are separated from the plate glass 16.

  In FIG. 2 again, the plate glass 16 brought on the cradle 13 is sent to the sputtering apparatus 70 through a cutting process of polishing the peripheral edge after cutting with a grindstone or the like. Will be obtained.

  In order to prevent the surface of the plate glass material 15 from being damaged, in the positioning region S1, the shape cutting region S2, and the temporary placement region S3, a seating surface for placing the plate glass material 15, that is, the positioning region S1. A suction device (not shown) for sucking and removing dust adhering to the upper surface of the positioning support table 17, the mounting surface 23 of the mounting table 24 in the shape cutting region S2, and the upper surface of the temporary mounting table 43 in the temporary placement region S3. It is desirable to cause the first and second positions) to appear on the positioning support table 17, the mounting table 24 and the temporary mounting table 43.

  Next, the operation of the first embodiment will be described. A sheet glass material 15 obtained by curving in advance a cutting line 30 having a predetermined shape that extends endlessly and cutting lines 31 that extend outward from a plurality of locations in the circumferential direction of the cutting line 30. In the heat removal region S4 after executing the first step in the shape cutting region S2 on the concave surface side which is the one surface, the second glass plate material 15 is heated at a portion corresponding to the plurality of the cut lines 31. Although the plate glass is cut along the cutting line 30 by executing the process, when the plate glass material 15 is heated in the heat removal region S4, the plate glass material 15 is cut at the portion corresponding to the cutting line 31. Since the heating nozzles 50 are heated from a certain convex surface side, no thermal shock is directly applied to the cut lines 31, and no chipping occurs around the cutting lines 30. Further, the heating nozzle 50 for heating the plate glass material 15 can be brought close to the surface of the plate glass material 15 to shorten the heating time.

  In addition, when the second step is performed in the heat removal region S4, the central portion of the sheet glass material 15 is positioned and placed on the support base 45 with the concave surface thereof facing upward, and is fixedly arranged around the support base 45. Since the hot air is applied to the glass sheet material 15 from below by the heating nozzles 50, the heating by the heating nozzles 50 can be started immediately when the glass sheet material 15 is positioned on the support 45. The heating nozzles 50 are sufficiently close to the surface of the plate glass material 15, and it is unnecessary to retreat the heating nozzles 50 when the plate glass material 15 is carried in and out by the first conveying means 34. Therefore, processing time can be shortened.

  Further, a hot air port 53 for blowing hot air is formed at the upper end of the heating nozzle 50, and a pair of guide plate portions 54, 54 extending upward from the side edge of the hot air port 53 and facing each other are provided. Since the guide plate portions 54 are formed in a triangular shape whose width is narrowed toward the upper side, when the plate glass material 15 is cut along the cutting line 30 by heating, the fragments 15a are on the hot air outlet 53 side. Even if it falls, the fragments 15a will slide down by the triangular guide plates 54, and the hot air vent 53 can be prevented from being blocked by the fragments 15a.

  Further, the second conveying means 56 for holding and carrying out the plate glass 16 after the cutting by heating is attached with a fragment forcible exclusion mechanism 66 that exerts a pressing force on the plate glass material 15 from above outside the cutting line 30. Therefore, even if the debris 15a remains caught by heating, the debris 15a can be reliably removed by applying a pressing force by the debris forced exclusion mechanism 66.

  FIG. 9 shows a second embodiment of the present invention. The parts corresponding to the first embodiment are indicated by the same reference numerals, and the detailed description is omitted.

  A vibrator 74 is attached to the support base 45 disposed in the heat removal region S4 so as to be fixed to the tip of the support cylinder 48 fixed to the support wall 44. In this second embodiment, the vibrator 74 is attached. A vibrator 74 is mounted on the support cylinder 48.

  According to this 2nd Example, it can prevent more reliably that a defective product arises by applying the vibration to the plate glass raw material 15 on the support stand 45 heated along the cut line 31 with the vibrator 74. FIG. . In other words, since the cutting line 31 extends over a relatively long distance, the cutting depth due to internal stress tends to vary, and sufficient self-cutting is insufficient at the portion where the penetration of cutting is slow when forced strain is generated by heating. Therefore, there is a possibility that so-called cracks (a state in which corners are missing in the shape of the clam pattern) may occur, resulting in a defective product. Thus, the necessary self-cutting penetration can be obtained, and the occurrence of the above-mentioned cracks can be prevented, and the occurrence of defective products can be more reliably prevented.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

It is a perspective view which shows a part of plate glass cutting device. It is a figure which shows the shape change of plate glass corresponding to the plate glass cutting device seen from the arrow 2 direction of FIG. It is a figure which shows a plate glass cutting device along the 3-3 line of FIG. Fig. 4 is a view taken along line 4-4 in Fig. 3. FIG. 5 is a view taken along line 5-5 in FIG. 2. It is a figure which shows a plate glass cutting device along 6-6 line of FIG. It is a perspective view of a heating nozzle. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 6. It is a figure corresponding to FIG. 5 of 2nd Example.

DESCRIPTION OF SYMBOLS 15 ... Sheet glass raw material 16 ... Sheet glass 30 ... Cutting line 31 ... Cutting line 45 ... Supporting stand 50 ... Heating nozzle 53 ... Hot-air port 54 ... Guide plate part 56- ..Conveying means 66 ... debris forced removal mechanism 74 ... vibrator

Claims (6)

Predetermined shape of the cutting line leading to the endless (30) and the first step of placing score lines extending outwardly from multiple several places該切break (30) to (31) from its one side to the plate glass material (15) After the execution, a second step of heating the plate glass material (15) from the other surface side at a part corresponding to the plurality of the cut lines (31) is performed, thereby cutting the plate glass material (15) to the cutting line (30 a sheet glass cutting method for cutting along),
Using a plate glass cutting device comprising a support base (45) for positioning and mounting the plate glass material (15), and a plurality of heating nozzles (50) fixedly arranged around the support base (45), Hot air blown from the plurality of heating nozzles (50) in a state where the central portion of the plate glass material (15) that has finished the first step is positioned and placed on the support base (45) with the one surface facing upward. The second step is performed so as to hit the material (15) from below,
A hot air port (53) for blowing the hot air upward is formed at the upper end of the heating nozzle (50), and extends upward from both side edges of the hot air port (53) to face each other. A pair of guide plate portions (54) are provided,
The plate glass cutting method characterized in that each of the guide plate portions (54) is formed in a triangular shape whose width decreases toward the top . The elongated hot air vent (53) is spaced outward from the cutting line (30) in a plan view and extends along the circumferential direction of the cutting line (30) and intersects the cut line (31). It arrange | positions so that it may do, The plate glass cutting method of Claim 1 characterized by the above-mentioned. A first step is performed in which a cutting line (30) having a predetermined shape connected in an endless manner and a cutting line (31) extending outward from a plurality of portions of the cutting line (30) are put into a sheet glass material (15) from one surface side. After performing the second step of heating the plate glass material (15) from the other surface side at portions corresponding to the plurality of cut lines (31), the plate glass material (15) is cut along the cutting line (30). A sheet glass cutting device for executing a sheet glass cutting method for cutting along
Upon performing the second step, the first central portion support table for positioning mounted to the one side above the finished glass sheet material of step (15) and (45), said support base ( 45) and a plurality of heating nozzles (50) for fixing hot air from below to the plate glass material (15) .
A hot air port (53) for blowing the hot air upward is formed at the upper end of the heating nozzle (50), and extends upward from both side edges of the hot air port (53) to face each other. A pair of guide plate portions (54) are provided,
These guide plate portions (54) of sheet glass cutting equipment, characterized in that, each of which is formed into a triangular shape to narrow the width toward the top. The elongated hot air vent (53) is spaced outward from the cutting line (30) in a plan view and extends along the circumferential direction of the cutting line (30) and intersects the cut line (31). It arrange | positions so that it may do, The plate glass cutting device of Claim 3 characterized by the above-mentioned. Conveying means (56) for holding and carrying out the glass sheet (16) after finishing the second step is provided, and the conveying means (56) has the above-mentioned outside of the cutting line (30). The plate glass cutting device according to claim 3 or 4 , characterized in that a debris forced exclusion mechanism (66) that exerts a pressing force on the plate glass material (15) from above is attached. The plate glass cutting device according to any one of claims 3 to 5 , wherein a vibrator (74) for applying vibration to the support base (45) is attached to the support base (45).

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