JP2006117480A - Work table for glass breaker, method of manufacturing the same and automatic glass breaker provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a work table for a glass breaker which has high flatness by few man-hours. <P>SOLUTION: The work table 230 for the glass breaker which has a main table 131 and a sub-table 232 fixed to the surface thereof as main constituents is used for dividing a glass substrate 12 while pressing a break head to the glass substrate 12 placed on the work table 230, wherein the sub-table 232 is constituted of a sub-table 232D (lower) having higher hardness and a sub-table 232U (upper) having lower hardness and is fixed to the main table 131 with screws 133. As a result, the flatness is secured even with the small number of the screws 133 and the accurate break and the break of the glass substrate 12 at a stable fracture surface are realized. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a work table for a glass breaker, a manufacturing method thereof, and an automatic glass breaker including the work table.

  When manufacturing a liquid crystal plate used for a display unit such as various electronic device parts or a slide glass used for creating a microscope specimen, a glass plate having a predetermined size is obtained by dividing a large glass substrate. For cutting the glass substrate, the glass substrate was fixed on the surface of the scriber by vacuum suction or the like, and the outer peripheral portion was formed of a hard member such as cemented carbide or diamond on one side of the glass substrate. After a linear streak called scribing is made with a wheel-shaped cutter, it is pressed along the scribe line by pressing means such as a press or a roller from the opposite surface side with a cutting device (breaker) to scribe the glass substrate. Generally, a method of cutting by causing a crack generated in a groove and extending in a direction perpendicular to the glass substrate surface is performed.

  The background art will be described below with reference to FIGS. FIG. 5 is an explanatory sectional view of the glass substrate cutting in the background art, FIG. 5 (a) is an explanatory view before cutting the glass substrate on the work table, FIG. 5 (b) is an explanatory view immediately after cutting the glass substrate, FIG. 6 is a plan view of an automatic glass breaker in the background art, FIG. 7 is a right side view of FIG. 6, and FIG. 8 is a front view of FIG. FIG. 9 is an explanatory diagram of a work table in the background art, FIG. 9 (a) is a plan view, and FIG. 9 (b) is a cross-sectional view taken along line AA in FIG. 9 (a).

  Regarding the glass breaker, there is a technique disclosed in Patent Document 1 below.

Patent Application Publication No. Sho 63-166734

  The glass breaker disclosed in Patent Document 1 and the break method using the same will be briefly described with reference to FIG. The glass breaker 10 adds a glass substrate 12 by aligning a semicircular or V-shaped pressure plate 11 made of hard rubber or resin with a scribe line 18 on a surface facing a line to be scribed provided on the glass substrate 12. Press and split. For this purpose, the glass substrate 12 is placed on a work table 14 composed of a hard main table 13A provided on the glass breaker 10 and a cushioning sub-table 13B provided on the surface thereof. Vacuum suction is performed (by means not shown) with the scribe line 18 aligned with the center of the arc. Since the cylinder head 15 having the pressure plate 11 is driven up and down by the cylinder 16, when the lowering operation is instructed to the cylinder 16, the pressure plate 11 comes into contact with the glass substrate 12 and generates a pressure 19. At the same time, a reaction force 17 is generated against the glass substrate 12 from the sub-table 13B having cushioning properties, and the glass substrate 12 is broken around the scribe line 18 by the apparent movement as indicated by P, and left and right. Divided.

  A conventional automatic glass breaker obtained by automating this glass breaker as a mass production apparatus will be described below with reference to FIGS. The conventional automatic glass breaker 100 is provided with two guide rail bases 102 in the longitudinal direction (X direction) on both sides of the upper surface of the base 101 having a rectangular shape, and the guide rails 103 are respectively fixed thereon. Then, outside the guide rail 103, two ball screws 104 are provided in parallel with each guide rail 103, and both ends thereof are supported by bearings 105. A ball nut 107 and a guide block 108 are fixed to the two nut housings 106, and the ball nuts 107 are fitted to the respective ball screws 104. The two guide blocks 108 are slidably engaged with the respective guide rails 103. Driven pulleys 109 are respectively provided on the front side axis extensions of the ball screws 104, a pulse motor 110 capable of normal rotation and reverse rotation is provided on the side surface of the base 101, and a drive pulley 111 is provided on the output shaft thereof. ing. The driving pulley 111 and the driven pulley 109 are transmitted by the timing belt 112. An idle pulley 113 provided on the upper surface of the base 101 applies an appropriate tension to the timing belt 112 and simultaneously changes the moving direction of the timing belt 112. Further, a head stand 114 is fixed vertically on the top surface of each nut housing 106, and a beam 115 is laid across the upper ends of both head stands 114. Break heads 120 are provided in parallel in the lateral direction.

  Next, the description of the break head 120 will be made with reference to FIG. Two air cylinders 121 are fixed to the upper surface of the beam 115 with their output shafts facing downward, and two left and right shafts 122 are fixed to the lower surface of the beam 115 centering on each air cylinder 121 downward. Has been. A ball bush housing 124 storing a ball bush fitted to each shaft 122 so as to be slidable in the axial direction is provided below the output shaft of each air cylinder 121. The output shaft of the air cylinder 121 having a hemispherical tip is fixed to the ball bush housing 124 using a connector 125 at the center of the upper surface of the ball bush housing 124. Also, a break bar 126 is provided below the ball bush housing 124, and the upper center portion of the break bar 126 and the lower surface center portion of the ball bush housing 124 are vertically oriented with the rotation pin 127 as the center. It is connected in a rotatable state. The pressure bar 126A provided at the tip of the break bar 126 is made of a material having low hardness (for example, resin or hard rubber).

  A work table 130 is provided at a substantially central portion of the automatic glass breaker 100 having such a configuration. As shown in FIGS. 9A and 9B, the conventional work table 130 is roughly composed of a main table 131 and a sub table 132 provided thereon. The main table 131 is made of a rectangular thick plate using carbon steel (S45C), the sub table 132 is made of a thick plate of vinyl chloride resin or urethane resin having the same rectangular shape as the main table 131, and the sub table 132 is made of the main table 131. Are fixed with screws 133. The stepped pin 134 for positioning by pressing the end face of the workpiece (glass substrate 12) is fixed by press-fitting its small diameter portion into a hole provided in the main table 131, and the large diameter portion penetrates the sub table 132. Projecting to the upper surface of the work table 130. The sub-table 132 is provided with a long hole-like vacuum supply hole (upper) 135, which is connected to a vacuum source (not shown) through a vacuum supply hole (lower) 136 provided in the main table 131. ing. The main table 131 is fixed on the upper surface of the base 101 via a table stand 137.

  The work table 130 configured as described above is required to have a high “flatness” although the reason will be described later in order to ensure the accuracy of the breaking portion of the glass substrate 12. The term “flatness” as used herein refers to the maximum distance (ie, local thickness) from the lower surface to the upper surface over the entire work table 130 when the lower surface of the work table 130 is an ideal flat surface (a flat surface having no unevenness or warpage). The difference between the value and the minimum value. In the example shown in FIG. 9A, 47 screws 133 for fixing the sub table 132 to the main table 131 are used, and the main portions such as the peripheral portion are screwed at intervals of 35 to 40 mm. Will be. The reason for tightening at such a narrow interval is that the sub-table 132 made of a soft resin such as urethane (for example, Shore hardness around 90 °) is assembled using the screws 133 and the work table 130 has a required flatness. It is.

  The break head 120 of the automatic glass breaker 100 is movable in the X direction. In other words, the pulse motor 110 rotates to a rotation angle designated by a pulse generated based on a program or an operator's command previously installed in the control device. This rotational force is transmitted from the driving pulley 111 to the two driven pulleys 109 via the timing belt 112, the ball screw 104 rotates, and the ball nut 107 moves in the X-axis direction by this rotation. The X-axis direction moving force of the ball nut 107 is transmitted to the nut housing 106 having the ball nut 107 and the guide block 108, and the nut housing 106 slides in the X direction along the guide rail 103. The movement of the nut housing 106 moves the break head 120 by an indicated amount in the X-axis direction via the head stand 114.

  A break bar 126 is provided at the lower end of the break head 120, and the break bar 126 is movable in the Z direction. That is, when the ball bush housing 124 is applied in the Z direction by the pressing force from the output shaft of the air cylinder 121, the ball bush housing 124 moves in the Z direction while being guided by the shaft 122. As a result, the break bar 126 connected to the ball bush housing 124 also moves in the Z direction.

  A work table 130 composed of a main table 131 made of S45C having high rigidity and a sub-table 132 made of vinyl chloride resin or urethane resin having low rigidity is provided at a substantially central portion on the upper surface of the base 101 as shown in FIG. It is. The glass substrate 12 (four in FIG. 6) is positioned by abutting the end face with a stepped pin 134 provided on the work table 130 (as shown in FIG. 9, the X direction is 134X, the Y direction Is brought into contact with 134Y, and further sucked and fixed to the work table 130 (with the vacuum supplied from the vacuum supply hole (upper) 135). The break head 120 is moved to the start position (near the upper end in the X direction in FIG. 6). In this state, the pulse motor 110 is instructed to rotate, the break head 120 is moved in the X direction by the required pitch, the arc center position of the pressure rod 126A is aligned with the scribe line previously applied to the glass substrate 12, and the air When the lowering operation is instructed to the cylinder 121, the break bar 126 descends in the Z direction and breaks the glass substrate 12 around the scribe line. The product (glass plate) divided from the glass substrate 12 is released from the restraint by vacuum suction and pushed out and placed on the work table 130, but the remaining glass substrate 12 is continuously sucked by the work table 130, Since the break position accuracy is maintained without moving due to the friction of the urethane resin, the break bar 126 is pulled up in the Z direction, and then the break head 120 is fed in the X direction by a necessary pitch amount, and the break bar 126 is moved in the Z direction. Lower and do the next break. This is repeated.

  In order to meet recent demands for high breaking accuracy, high flatness is required for the work table 130 on which the glass substrate 12 is placed. That is, when the flatness of the work table 130 is high, the glass substrate 12 is placed flat. As a result, the break position does not deviate from the scribe line 18, and the pressing force against the glass substrate 12 becomes uniform, and the glass breakage occurs. This is because the cross section is stable. (If the pressing force is applied non-uniformly, the transparent break surface becomes clouded under normal conditions.) However, the resin used for the sub-table 132 has a certain degree of softness as is apparent from the above-described break mechanism. (For example, the Shore hardness is about 70 ° to 90 °), the table size is, for example, 500 mm in length and 300 mm in width, and the required flatness (for example, 30 μm) with the main table 131 and the sub table 132 assembled. In order to achieve this, a large number of screws 133 (47 in the examples shown in FIGS. 6 and 9) must be tightened evenly, requiring a large number of assembly steps and high skill. . Further, the sub-table 132 is a consumable item that is soft (low hardness) and wears due to repeated contact / removal with the workpiece during mass production of the workpiece, and therefore needs frequent replacement. Conventionally, this troublesome work has been performed each time, so that the break process has been one cause of an increase in product cost.

  The present invention has been made to solve the above problems. As a means for solving the problem, the invention according to claim 1 of the present invention is the break line engraved on a glass substrate placed on a work table having a main table and a sub-table fixed to the surface as main components. Further, in a work table for a glass breaker that presses a break head to divide the glass substrate, the sub table has a high hardness sub table (lower), and a low hardness sub table (upper) provided thereon. The sub-table is fixed to the main table with screws through the sub-table (lower).

  The invention according to claim 2 of the present invention is characterized in that the sub-table (lower) is made of a ferrous metal material and the sub-table (upper) is made of a synthetic resin material.

  The invention according to claim 3 of the present invention uses a synthetic resin that is liquid and adhesive as the synthetic resin material, and is solidified on the surface of the subtable (lower) to form a subtable (upper) material. Then, the manufacturing method of the work table for glass breakers is characterized in that the sub table is manufactured by processing and flattening the upper surface of the sub table (upper) material.

  The invention according to claim 4 of the present invention is a method for manufacturing a work table for a glass breaker, wherein a urethane resin is used as the liquid synthetic resin having adhesiveness.

  In the invention according to claim 5 of the present invention, the sub-table (upper) and the sub-table (lower) are individually surface-processed and then joined using an adhesive. ) A method for producing a work table for a glass breaker, characterized by processing and flattening the surface.

  The invention according to claim 6 of the present invention is an automatic glass breaker comprising the glass breaker worktable according to any one of claims 1 to 2.

  The invention according to claim 7 of the present invention is an automatic glass breaker provided with a work table for glass breaker manufactured by the manufacturing method according to any one of claims 3 to 5.

  As an effect of the invention, the work table for glass breaker of the present invention according to claim 1 is a work table in which a sub table (lower) portion having high hardness is screwed to a main table among the sub tables constituting the work table. Since the table is configured, the high flatness necessary for the work table can be easily ensured even if the number of screws constituting the work table is small or the person is not skilled in tightening work. And if this work table is used, it becomes possible to break the glass substrate with an accurate break position and a stable fracture surface, so that the defective rate of the broken glass is lowered, and various electronic device parts using it are reduced. Manufacturing costs for liquid crystal plates and the like are reduced. In addition, when the sub-table that has been worn out after repeated use is collected and used for recycling, it is light in weight and can be transported easily.

  In addition, the glass breaker worktable of the present invention according to claim 2 is a common industry, both iron-based metal materials used as the material for the subtable (lower) and synthetic resin materials used as the material for the subtable (upper). With regard to the materials, commercial products according to the respective specifications can be easily obtained at low cost.

Moreover, in manufacture of the work table for glass breakers of this invention concerning Claim 3,
Adhesive liquid synthetic resin is used for the material of the sub-table (upper), and it is solidified on the upper surface of the sub-table (lower), so the sub-table (upper) and sub-table ( Bottom) can be joined.

Moreover, in manufacture of the worktable for glass breakers of this invention concerning Claim 4,
Since the liquid urethane resin is used as the material for the sub-table (upper), it self-adheres on the sub-table (lower) when the liquid urethane resin is solidified. In addition, since the urethane resin can set a wide hardness range, it is possible to select the hardness most suitable for the specific glass breaker.

In the production of the work table for glass breaker of the present invention according to claim 5,
Since the sub-table (upper) and the sub-table (lower) are individually surface processed and then joined with an adhesive, the sub-table (upper) and the sub-table (lower) are each in a separate department that specializes in production technology. The effect which can be processed is acquired.

  An automatic glass breaker comprising the glass breaker work table according to any one of claims 1 to 2 of the present invention according to claim 6 regenerates the work table which is a consumable item. In this case, it is only necessary to replace the sub-table, but since the sub-table is lightweight, the exchanging workability is excellent and the working time is short, leading to an increase in the operating rate of the automatic glass breaker.

An automatic glass breaker comprising a work table for a glass breaker manufactured by the manufacturing method according to any one of claims 3 to 5 of the present invention according to claim 7,
When you regenerate the worktable, which is a consumable item, you only need to replace the subtable. However, because the subtable is lightweight, it has excellent replacement workability, shortens the work time, and increases the operating rate of the automatic glass breaker. Leads to.

  Next, the best mode for carrying out the present invention (hereinafter abbreviated as “embodiment”) will be described with reference to FIGS. FIG. 1 is a plan view of an automatic glass breaker equipped with a work table according to the first embodiment of the present invention, FIG. 2 is a work table according to the first embodiment of the present invention, FIG. 2 (b) is a cross-sectional view taken along the line AA in FIG. 2 (a), and FIG. 3 is a cross-sectional view of the manufacturing process in the portion corresponding to FIG. 2 (a) AA of the work table according to the first embodiment of the present invention. 3 (a) shows a case where a subtable (upper) material is formed on the surface of the subtable (lower), and FIG. 3 (b) shows a case where the surface of the subtable (upper) material is processed to be flat. 3 (c) shows a case where the sub-table material is finished with various holes and finished as a sub-table, and FIG. 3 (d) shows the case where the sub-table is attached on the main table using a connecting screw. Show the case. By the way, the automatic glass breaker equipped with the work table of the present invention shown in FIGS. 1 and 2 is the same as the automatic glass breaker already described with reference to FIGS. . Accordingly, the same components as those described in the background art are denoted by the same reference numerals, and only a brief description will be given.

  As shown in FIG. 2, the work table 230 according to the first embodiment includes a main table 131 and a sub table 232 when roughly divided. The main table 131 is made of a rectangular thick plate using carbon steel (S45C), and a sub-table 232 having the same rectangular shape as the main table 131 is provided on the main table 131. A stepped pin 134 for positioning by pressing the end face of the workpiece (glass substrate 12) is fixed by press-fitting its small diameter portion into a hole provided in the main table 131, and the large diameter portion penetrates the sub table 232. Projecting to the upper surface of the work table 230. The sub-table 232 is provided with an elongated vacuum supply hole (upper) 235, which is connected to a vacuum source (not shown) through a vacuum supply hole (lower) 136 provided in the main table 131. Yes. The main table 131 is used by being fixed to the upper surface of the base 101 of the automatic glass breaker 200 via a table stand 137.

First, the detailed configuration of the sub-table 232 and the manufacturing method thereof in the first embodiment will be described with reference to FIG. The sub-table 232 of this embodiment is composed of a sub-table (lower) 232D and a sub-table (upper) 232U as shown in the sectional shape in FIG. 3 (c). The manufacturing process is as follows.
Step a-1: A sub-table (lower) material 232DS made of a rectangular thick plate (thickness of about 5 mm) made of carbon steel (S45C) is prepared. The sub-table (lower) material 232DS is annealed to prevent aging, and the surface is hard Cr plated for rust prevention.
Step a-2: The sub-table (lower) material 232DS is surrounded by a frame 232W, and a liquid urethane resin is poured into the frame 232W to form a sub-table (upper) material 232US. When the urethane resin is hardened, the sub-table (lower) material 232DS and the sub-table (upper) material 232US are bonded and integrated into a sub-table material 232S. It should be adjusted in advance so that the Shore hardness of the hardened urethane resin is about 90 ° (the hardness of the urethane resin is easy to select).
Step b: Sub table (upper) When the urethane resin constituting the material 232US is solidified, the surface of the urethane resin is shaved to a flatness of 30 μm or less (when the table size is about 500 mm * 300 mm), and the surface processed sub table material 232M Is produced.
Step c: A screw hole 133H, a stepped pin hole 134H, and a vacuum supply hole (upper) 235H are processed in the surface-treated subtable material 232M to complete the subtable 232.
Step d-1: The main table 131 is prepared separately. The main table 131 is a rectangular thick plate (thickness of about 20 mm) made of carbon steel (S45C), which has been annealed to prevent changes over time, and the surface is rust-proofed with a hard Cr plating finish. . The flatness is within 30 μm, and a female screw for the screw 133, a hole for the stepped pin 134, and a vacuum supply hole (lower) 136 are processed.
Step d-2: The main table 131 and the sub-table 232 are coupled using screws 133 (six), and stepped pins 134 (20) are incorporated to complete the work table 230.

  Next, the description of the automatic glass breaker 200 including the work table 230 according to the first embodiment will be started. As shown in FIG. 1, an automatic glass breaker 200 equipped with a work table 230 of the present invention is provided with two guide rails 103 on a guide rail base 102 on the upper surface of a base 101, and in parallel with the guide rails 103. Two ball screws 104 are provided and supported by bearings 105. Further, a ball nut 107 and a guide block 108 are fixed to the two nut housings 106, respectively. The ball nut 107 is fitted to each ball screw 104, and the two guide blocks 108 are each guided rail 103. And is slidably fitted. A driven pulley 109 is provided at the tip of each ball screw 104, and is linked to a driving pulley 111 provided on the output shaft of the pulse motor 110 by a timing belt 112 through an idle pulley 113. Further, a beam 115 is mounted on a head stand 114 provided on the upper surface of each nut housing 106, and two break heads 120 are provided on the beam 115.

  The configuration of the break head 120 is exactly the same as that of the background art, and the description thereof will be made while diverting FIGS. 7 and 8 used in the explanation of the background art. That is, two air cylinders 121 are fixed to the upper surface of the beam 115 with the output shaft facing downward, and two shafts 122 are fixed to the lower surface of the beam 115 with the air cylinders 121 sandwiched therebetween. Yes. A ball bush housing 124 storing a ball bush fitted to each shaft 122 is provided below the output shaft of each air cylinder 121. The output shaft of the air cylinder 121 having a hemispherical tip is fixed by a ball bush housing 124 and a connector 125. The ball bush housing 124 is connected to a break bar 126 provided on the lower side of the ball bush housing 124 via a rotation pin 127, and the tip of the break bar 126 is pressurized with a material having low hardness (for example, resin or hard rubber). A rod 126A is provided. Below the break head 120 having such a configuration, as shown in FIG. 1, a work table 230 which is a feature of the present invention is provided at a substantially central portion of the base 101.

  The break head 120 is movable in the X direction in FIG. 1 as in the background art. That is, the rotational force of the pulse motor 110 is transmitted from the driving pulley 111 to the two driven pulleys 109 via the timing belt 112, and by rotating the ball screw 104, the ball nut 107 fitted thereto is moved in the X-axis direction. Move to. The movement of the ball nut 107 is transmitted to the nut housing 106, the nut housing 106 is slid along the guide rail 103 in the X direction, and the break head 120 is moved in the X axis direction via the head stand 114 and the beam 115. . Further, the break bar 126 provided at the lower end of the break head 120 can be moved in the Z direction by the air cylinder 121 as in the background art already described.

  The automatic glass breaker 200 having such a configuration is provided with the work table 230 of the present embodiment, and the work (glass substrate 12) end surface is pressed against the stepped pins 134 of the work table 230 (in the same manner as the background art). ) After positioning, the work (glass substrate 12) is adsorbed onto the work table 230 by the vacuum supplied from the vacuum supply hole (upper) 235, and fixed by using the frictional force of urethane resin together. The break head 120 is moved to the start position. In this state, the break head 120 is moved by a necessary pitch amount in the X direction, the arc center position of the pressure rod 126A is aligned with the scribe line provided on the glass substrate 12, and the break bar 126 is lowered in the Z direction. 12 is divided. Thereafter, the break bar 126 is once pulled up in the Z direction, the break head 120 is fed in the X direction by a necessary pitch amount, and then the break bar 126 is lowered in the Z direction to execute the next break. This is repeated.

  The work table 230 according to the first embodiment can secure the flatness necessary for the work table 230 even if the number of screws 133 used for the work table 230 is reduced. A break at the cross-section is realized. The reason is that the screw 133 is only fastened to the main table 131 via the sub-table (lower) 232D, so that the soft table (for example, the Shore hardness is around 70 ° to 90 °) is tightened on the sub-table (upper) 232U by tightening the screw 133. This is because no deformation occurs. As described above, the flatness accuracy can be ensured with fewer screws 133. As a result, the number of man-hours for assembly as the work table 230 and the man-hours for replacing the sub-table 232, which is a consumable item, can be reduced. Since it becomes easy to ensure the flatness of the work table 230, the flatness is stabilized, the defect occurrence rate of the broken glass substrate 12 is lowered, and this leads to a reduction in manufacturing cost of liquid crystal plates and the like of various electronic device parts using the same. . If the sub-table 232, which is a consumable item, is worn and replaced, the replacement work does not require skill, so the breaker operator can perform the replacement work. Also, the replacement parts are lightweight, so the replacement time is short. This will also increase the operating rate of the automatic glass breaker 200. In addition, the worn sub-table 232 is collected and used for recycling, but the work is easy because it is lightweight. Moreover, in Embodiment 1, although the urethane resin was demonstrated to the example as a synthetic resin which has adhesiveness in liquid form, even if it uses other resin which has the same function, the same effect is exhibited. Conventionally, an integrated work table method in which urethane is directly solidified on the main table 131 and flattened has been technically possible. However, in this case, the work table is heavy and workability such as transportation is improved. Therefore, as described above with reference to FIG. 9 in the background art, a method in which the sub table 132 and the main table 131 are separately manufactured and assembled with the screws 133 has been widely used.

Next, the configuration of the work table and the manufacturing method thereof according to the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a sectional view of the manufacturing process shown in FIG. 2 (a) corresponding to AA of the work table in the second embodiment of the present invention. FIG. 4 (a) shows the sub-table (upper) material,
FIG. 4B shows the case where the surface of the sub-table (upper) material is processed flat, and FIG. 4C shows the surface-processed sub-table material (upper) on the surface of the sub-table (lower). FIG. 4D shows a case where the sub-table is mounted on the main table using screws, after various holes are processed and finished as a sub-table.

The work table 330 of the second embodiment has the configuration shown in FIG. 4D, and the sub-table 332 that constitutes the feature of this embodiment is a sub-table (as shown in FIG. 4C). Lower) 332D, sub-table (upper) 332U, and adhesive layer 340 provided therebetween. And the manufacturing process is as follows.
Step a: A liquid urethane resin is poured into the frame 332W and solidified to form a sub-table (upper) material 332US. The Shore hardness of the hardened urethane resin is about 90 °.
Step b: The solidified urethane resin surface is scraped to produce a sub-table (upper) material 332UM that has been processed to have a flatness of 30 μm or less. (However, when table size is 500mm * 300mm)
Step c: Separately, a sub-table (lower) material is prepared which is made of a rectangular thick plate (thickness of about 5 mm) made of carbon steel (S45C) and serves as a sub-table (lower) material. The subtable (bottom) material is annealed to prevent aging, and the surface is hard Cr plated to prevent rust. Then, after the sub-table (upper) material 332UM manufactured in step b is bonded to the surface of the sub-table (lower) material with a chloroprene rubber adhesive, the screw hole 133H, the stepped pin hole 134H, the vacuum supply hole ( When the upper) 235H is processed, a sub-table 332 including the sub-table (upper) 332U, the sub-table (lower) 332D, and the adhesive layer 340 is completed.
Step d-1: The main table 131 is prepared separately. The main table 131 is a rectangular thick plate (thickness: about 20 mm) made of carbon steel (S45C), which has been annealed to prevent changes over time. The degree is within 30 μm. Further, a female screw for the screw 133, a hole for the stepped pin 134, and a vacuum supply hole (lower) 136 are processed.
Step d-2: The main table 131 and the sub-table 332 are coupled using the screws 133 (six), and the stepped pins 134 (20) are press-fitted to complete the work table 330.
In addition, the structure in the case of mounting | wearing the automatic glass breaker with the work table 330 of this 2nd Embodiment, and its usage are the same as 1st Embodiment already demonstrated.

  Similar to the work table of the first embodiment, the work table 330 of the second embodiment is used for the construction of the work table 330 because the screw 133 is only tightened on the main table 131 via the sub-table (lower) 332D. Even if the number of screws is small, the flatness as the work table 330 can be secured, and an accurate break position and a break of the glass substrate 12 at a stable fracture surface are possible. As a result, the assembly man-hour of the work table 330 and the replacement man-hour of the sub-table 332 are reduced as in the first embodiment, and the defect occurrence rate of the broken glass substrate 12 is reduced by facilitating ensuring flatness. This also leads to a reduction in the manufacturing cost of liquid crystal plates and the like of various electronic device parts using the same. Also, when replacing the consumable sub-table 332, as in the first embodiment, the replacement work is simplified, the work does not require skill, can be replaced in a short time, and the operating rate of the glass breaker is increased. Leads to. In addition, the worn sub-table 332 is collected and used for recycling. However, since it is lightweight, it is easy to carry. Generally, processing equipment and processing technology differ between urethane resin and carbon steel. If it is more desirable to process the subtable (upper) 332U and the subtable (lower) 332D in different departments, each of which is good at production technology, the second embodiment is more effective than the first embodiment described above. Adopting the configuration and production method has a greater merit.

  As described above, the case where the work table of the present invention is mounted on an automatic glass breaker has been described as an example, but the use of the work table of the present invention is not limited thereto. The effect is exactly the same with a manual glass breaker.

It is a top view of the automatic glass breaker carrying the work table of this invention. It is a work table in a 1st embodiment of the present invention, Drawing 2 (a) is a top view and Drawing 2 (b) is an AA sectional view in Drawing 2 (a). 2A is a cross-sectional view of a manufacturing process corresponding to FIG. 2A corresponding to AA of the work table according to the first embodiment of the present invention, and FIG. 3A is a diagram illustrating the formation of a sub table (upper) material on the surface of the sub table (lower). 3B is a cross-sectional view when the surface of the sub-table (upper) material is flattened to form a sub-table material, and FIG. 3C is a view showing various holes in the sub-table material. FIG. 3D is a cross-sectional view when the sub-table is mounted on the main table using a screw. FIG. 4A is a cross-sectional view of the manufacturing process shown in FIG. 2A corresponding to AA of the work table in the second embodiment of the present invention, FIG. 4A is a cross-sectional view of the sub-table (upper) material, and FIG. ) Is a cross-sectional view when the surface of the sub-table (upper) material is processed flat, and FIG. 4 (c) shows the surface-treated sub-table material (upper) using an adhesive on the surface of the sub-table (lower). FIG. 4D is a cross-sectional view when the sub-table is mounted on the main table using screws, after various holes are processed and finished as a sub-table. FIG. 5A is a cross-sectional view of glass substrate cutting in the background art, FIG. 5A is a cross-sectional view before cutting the glass substrate, and FIG. 5B is a cross-sectional view immediately after cutting the glass substrate. It is a top view of the automatic glass breaker in background art. FIG. 7 is a right side view of FIG. 6. FIG. 7 is a front view of FIG. 6. FIG. 9A is a plan view and FIG. 9B is a cross-sectional view taken along line AA in FIG. 9A.

Explanation of symbols

12 Glass substrate 120 Break head 131 Main table 133 Screw
230, 330 Work table 232, 332 Sub table 232D, 332D Sub table (bottom)
232U, 332U sub-table (top)
232US, 332US Subtable (top) material

Claims (7)

For a glass breaker that presses a break head against a break line engraved on a glass substrate placed on a work table having a main table and a sub-table fixed to the surface as a main component, and divides the glass substrate. In this work table, the sub-table is composed of a sub-table having a high hardness (bottom) and a sub-table having a low hardness (top) provided thereon, and the sub-table is interposed via the sub-table (bottom). A work table for a glass breaker, which is fixed to the main table with a screw. The work table for a glass breaker according to claim 1, wherein the sub-table (lower) is made of an iron-based metal material, and the sub-table (upper) is made of a synthetic resin material. A synthetic resin material that is liquid and adhesive is used as the synthetic resin material, and is solidified on the surface of the sub-table (lower) to form a sub-table (upper) material, and then the upper surface of the sub-table (upper) material The manufacturing method of the work table for glass breakers according to claim 2, wherein the sub-table is manufactured by processing and flattening. The method for producing a work table for a glass breaker according to claim 3, wherein a urethane resin is used as the liquid and adhesive synthetic resin. The sub-table (upper) and the sub-table (lower) are individually surface processed and then joined using an adhesive, and then the sub-table (upper) surface is processed and flattened. The manufacturing method of the work table for glass breakers as described in any one of Claims 1 thru | or 2. The automatic glass breaker provided with the work table for glass breakers as described in any one of the said Claims 1 thru | or 2. The automatic glass breaker provided with the work table for glass breakers manufactured with the manufacturing method as described in any one of the said Claims 3 thru | or 5.

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