Manufacturing methods for tool components, processing apparatus, and glass plates

Abstract

The tool assembly of the present invention includes: a processing member 2 for processing the end face of a glass plate G and capable of rotation; and a retaining member 3 for holding the processing member 2 and also capable of rotation. The tool assembly further includes: a space portion 9c disposed in the retaining member 3 and / or the processing member 2 and for adjusting the balance of rotation; and a sealing member 6 for preventing liquid from entering the space portion 9c.

Description

Technical Field

[0001] This invention relates to a tool assembly, processing apparatus, and method for processing glass plates. Prior Technology

[0002] As is well known, in the manufacturing process of glass plates, the end faces of the glass plates are mostly ground or polished by a processing device. For example, in Patent Document 1, as an example of a processing device, a processing device including a rotatable processing workpiece (grinding stone), a holding member for holding the processing workpiece, and a spindle that serves as the rotating shaft for rotating the processing workpiece is disclosed.

[0003] The retainer of the machining apparatus has: a flange portion for supporting one axial end of the workpiece; and a hole portion for the spindle to engage. The retainer is configured to rotate together with the workpiece by being driven by the spindle while the workpiece is supported by the flange portion.

[0004] Sometimes a hole is formed at one end of the machined part or flange to adjust the balance during rotation. In this case, the machined part is mounted to the retainer with the hole in the machined part facing the flange, and the hole in the flange facing the machined part. In this way, the hole in the machined part is closed by the flange, and the hole in the flange is closed by the machined part. [Existing technical documents] [Patent Literature]

[0005] Patent Document 1: International Publication No. 2020 / 039940 Summary of the Invention

[0006] [The problem that the invention aims to solve] As described above, in existing processing equipment, the holes used for balancing are blocked by the flanges of the workpiece or retainer. However, due to vibrations during processing, liquids such as grinding fluid may sometimes seep between the flange and one end of the workpiece, and the liquid accumulates in the holes. If the liquid accumulates in the holes, the rotational balance of the processing equipment is disrupted, vibrations increase, and the processing accuracy of the glass plate may deteriorate.

[0007] The present invention was made in view of the above circumstances, and its technical problem is to prevent the deterioration of the rotational balance of the processing device. [Methods for solving problems]

[0008] The present invention addresses the aforementioned problem by providing a tool assembly comprising: a processing component for processing the end face of a glass plate and capable of rotation; and a retaining component for retaining the processing component and also capable of rotation. The tool assembly is characterized by including: a space portion disposed in the retaining component and / or the processing component, for adjusting the rotational balance; and a sealing member for preventing liquid from entering the space portion.

[0009] According to the structure, by using a sealing member to prevent liquid from accumulating in the space, the deterioration of the rotational balance of the processing device can be reliably prevented.

[0010] In the tool assembly of the present invention, the space may also be located inside the processing device. According to this structure, the rotational balance of the processing device can be efficiently achieved. Even in this case, a sealing member can prevent liquid from accumulating in the space.

[0011] In the tool assembly of the present invention, the workpiece may also have a first end face and a second end face located on the opposite side of the first end face, the retainer has a support portion that supports the first end face, and the space portion is formed on the first end face.

[0012] According to the structure, by using a sealing member to prevent liquid from entering the space, liquid can be prevented from accumulating in the space.

[0013] In the tool assembly of the present invention, the workpiece may also have a through hole extending from the first end face to the second end face, and the sealing member may be disposed on the second end face in a manner that closes the through hole.

[0014] According to the structure, by using a sealing member to prevent liquid from entering the through hole, liquid can be prevented from entering the space through the through hole.

[0015] In the tool assembly of the present invention, the sealing member may also include: a cover body for blocking the through hole; and a sealing body for sealing the cover body and the second end face of the workpiece.

[0016] According to the structure, by using the cover and sealing body of the sealing member to prevent liquid from entering the through hole, liquid can be prevented from entering the space through the through hole.

[0017] In the tool assembly of the present invention, the retainer may also have a cylindrical portion disposed at the center of the support portion, and the cover may have a connecting portion connected to the cylindrical portion. According to this structure, the sealing member can be fixed to the retainer via the connecting portion.

[0018] In the tool assembly of the present invention, the cover may also be made of resin. According to this structure, the processing device can be made lighter.

[0019] The processing apparatus of the present invention is used to solve the aforementioned problem, characterized in that it includes: the tool assembly; and a rotating shaft for rotating the tool assembly. According to this structure, by utilizing a sealing member to prevent liquid from accumulating in the space, the deterioration of the rotational balance of the processing apparatus can be reliably prevented.

[0020] The glass plate manufacturing method of the present invention addresses the aforementioned problem, characterized by including a step of processing the end face of the glass plate using the processing apparatus. According to this structure, deterioration of the rotational balance of the processing apparatus can be prevented, resulting in the manufacture of glass plates with high processing precision. [The effects of the invention]

[0021] The present invention can prevent the deterioration of the rotational balance of the processing device. Simple Explanation of the Diagram

[0022] Figure 1 is a cross-sectional view of the processing apparatus according to the first embodiment. Figure 2 is a cross-sectional view of the machined part. Figure 3 is a cross-sectional view of the retainer. Figure 4 is a side view of the sealing component. Figure 5 is a plan view of the sealing component. Figure 6 is a perspective view showing the manufacturing method of the glass plate. Figure 7 is a cross-sectional view of the processing apparatus according to the second embodiment. Figure 8 is a plan view of the sealing component. Implementation

[0023] Hereinafter, the configuration for implementing the present invention will be described with reference to the drawings. Figures 1 to 6 show a first embodiment of the tool assembly, processing apparatus, and method for manufacturing a glass plate according to the present invention.

[0024] As shown in Figure 1, the processing apparatus 1 includes: a rotatable workpiece 2, a rotatable retaining member 3 that holds the workpiece 2, a spindle 4 serving as a rotation axis for rotating the workpiece 2 via the retaining member 3, a first fixing member 5a that fixes the workpiece 2 to the retaining member 3, a second fixing member 5b that fixes the retaining member 3 to the spindle 4, and a sealing member 6 installed on the workpiece 2. Hereinafter, the retaining member 3 that holds the workpiece 2 in its state will also be referred to as a tool assembly.

[0025] As shown in Figures 1 and 2, the processing part 2 includes a processing part 7 (grinding part) for processing the glass plate G, and a main body part 8 for supporting the processing part 7.

[0026] As the processing unit 7, for example, an electrodeposited grinding stone that fixes diamond abrasive grains by electrodeposition of metal or a metal-bonded grinding stone that fixes abrasive grains by metal binder may be used.

[0027] The main body 8 includes, for example, a cylindrical member made of metal. A machined portion 7 is integrally formed on the outer peripheral surface of the main body 8. The main body 8 has: a first end face 8a formed at one end in the direction of the cylinder center, a second end face 8b located on the side opposite to the first end face 8a in the direction of the cylinder center, a first through hole 8c through which a portion of the retaining member 3 is inserted, and a plurality of second through holes 8d through which the first fixing member 5a is inserted.

[0028] In this embodiment, the main body 8 is supported by the retainer 3 with the first end face 8a facing downward and the second end face 8b facing upward.

[0029] The first end face 8a of the main body 8 has a first recess 9 at its center. The first recess 9 has a bottom surface 9a and a side wall surface 9b. The bottom surface 9a is circular in shape when viewed from above. A first through hole 8c is located on the bottom surface 9a.

[0030] The bottom surface 9a of the first recess 9 has a space 9c located radially away from the center. The space 9c may include, for example, a hole (e.g., a circular hole) formed by a tool such as a drill bit. However, the space 9c may also be formed by creating a recess in the bottom surface 9a. In this embodiment, one space 9c formed in the bottom surface 9a is exemplified, but multiple space 9cs may also be formed in the bottom surface 9a.

[0031] The side wall 9b of the first recess 9 is configured to be circular when viewed from above, in a manner that surrounds the periphery of the bottom surface 9a.

[0032] The second end face 8b of the main body 8 has a second recess 10 at its center. The second recess 10, like the first recess 9, has a bottom surface 10a that is circular in plan view and a side wall surface 10b that is circular in plan view surrounding the bottom surface 10a.

[0033] The first through hole 8c is a hole that extends from the first end face 8a to the second end face 8b at the center of the main body 8. Specifically, the first through hole 8c extends from the bottom surface 9a of the first recess 9 of the first end face 8a to the bottom surface 10a of the second recess 10 of the second end face 8b. The second through hole 8d is formed at a position in the main body 8 away from the center in the radial direction. Each second through hole 8d has a holding part 11 for holding a portion of the first fastener 5a.

[0034] As shown in Figures 1 and 3, the retainer 3 has a cylindrical portion 12 and a flange portion 13 formed at one end of the cylindrical portion 12.

[0035] The cylindrical portion 12 is configured as a cylinder and integrally formed at the center of the flange portion 13. The cylindrical portion 12 has an internal space capable of accommodating the second fastener 5b. An internal thread 12a is formed on the inner surface of the cylindrical portion 12 for engaging a portion of the sealing member 6 (see Figure 3).

[0036] The outer diameter of the cylindrical portion 12 is smaller than the inner diameter of the first through hole 8c of the machined part 2. The cylindrical portion 12 is inserted into the first through hole 8c in a concentric manner with the first through hole 8c of the machined part 2. With this structure, a gap S is formed between the outer surface of the cylindrical portion 12 and the inner surface of the first through hole 8c (see Figure 1).

[0037] The flange portion 13 functions as a support portion for supporting the workpiece 2. The flange portion 13 is configured as a circular plate, but is not limited to that shape. The flange portion 13 includes: a first surface 13a formed at an end in the thickness direction, a second surface 13b located on the side opposite to the first surface 13a, and an end surface 13c connecting the first surface 13a and the second surface 13b.

[0038] In this embodiment, the first surface 13a faces upward and the second surface 13b faces downward. The first surface 13a contacts the bottom surface 9a of the first recess 9 in the workpiece 2. A cylindrical portion 12 is formed in the center of the first surface 13a.

[0039] The flange portion 13 includes: a shaft insertion hole 14 through which the spindle 4 is inserted, a support surface 15 that contacts the first end face 8a of the workpiece 2, and a fixing hole 16 into which a portion of the first fixing member 5a is inserted.

[0040] The shaft insertion hole 14 functions as a receiving portion that houses a part of the main shaft 4. The shaft insertion hole 14 is formed at the center of the flange portion 13. The shaft insertion hole 14 communicates with the interior of the cylindrical portion 12. The shaft insertion hole 14 has a tapered inner surface (contact surface) 14a that contacts a part of the main shaft 4. The inner surface 14a is configured such that its inner diameter decreases from the second surface 13b side of the flange portion 13 towards the first surface 13a side.

[0041] The inner diameter of the smaller diameter end in the shaft insertion hole 14 is smaller than the inner diameter of the cylindrical portion 12. With this structure, a retaining portion 21 is formed between the shaft insertion hole 14 and the cylindrical portion 12 to retain a portion of the second fastener 5b.

[0042] A support surface 15 is formed on the first surface 13a of the flange portion 13. The support surface 15 supports the main body portion 8 by contacting the bottom surface 9a of the first recess 9 in the main body portion 8 of the workpiece 2. Thereby, the space portion 9c provided on the bottom surface 9a of the first recess 9 is covered by the support surface 15. Therefore, the tool assembly has a space portion 9c inside it.

[0043] The fixing hole 16 is formed on the first surface 13a of the flange portion 13 at a position away from the center along the radial direction. The fixing hole 16 is a threaded hole formed from the first surface 13a to the middle part in the thickness direction of the flange portion 13, and is formed at a position corresponding to the holding portion 11 of the machined part 2.

[0044] The spindle 4 has a tapered shaft portion 4a. The shaft portion 4a has a tapered surface whose outer diameter decreases as it moves from the base end to the front end. A fixing hole 17 is formed on the end face of the shaft portion 4a for a portion of the second fixing member 5b to be inserted. The fixing hole 17 includes, for example, a threaded hole. The spindle 4 can rotate together with the workpiece 2 and the retaining member 3, accompanied by power transmission from a drive device (not shown) such as a motor.

[0045] The first fastener 5a includes a bolt (e.g., an internal hex bolt). As shown in FIG1, the shaft portion 18a of the first fastener 5a is inserted into the fixing hole 16 of the retainer 3. The head 18b of the first fastener 5a is supported by the retaining portion 11 of the second through hole 8d.

[0046] The second fastener 5b includes a bolt 19 (e.g., an internal hex bolt) and a pressing plate 20. The shaft portion 19a of the bolt 19 passes through the pressing plate 20 and is embedded in the fixing hole 17 of the main shaft 4. The head 19b of the bolt 19 is supported by the pressing plate 20.

[0047] The pressing plate 20 is configured as a circular plate and has a hole 20a at its center through which the shaft portion 19a of the bolt 19 is inserted. As shown in FIG1, the pressing plate 20 is supported by the retaining portion 21 formed between the cylindrical portion 12 of the retaining member 3 and the shaft insertion hole 14.

[0048] The sealing member 6 is used to prevent liquids such as grinding fluid and polishing fluid from entering the space 9c through the gap S between the first through hole 8c of the workpiece 2 and the cylindrical portion 12 of the retainer 3, and through the first surface 13a of the flange portion 13. The sealing member 6 is fixed to the second end face 8b of the workpiece 2 in a manner that blocks the first through hole 8c of the workpiece 2.

[0049] As shown in Figures 1, 4 and 5, the sealing component 6 includes a cover 22 and a sealing body 23 installed on the cover 22.

[0050] In this embodiment, the cover 22 is made of resin, but the material of the cover 22 is not limited to this embodiment. The cover 22 has a cover portion 24 that closes the first through hole 8c and the second recess 10 of the processed part 2, and a connecting portion 25 that connects to the cylindrical portion 12 of the retainer 3.

[0051] The cover portion 24 is configured as a circular plate, but is not limited to the shape described above. The cover portion 24 has a first surface 24a formed at one end in the thickness direction, a second surface 24b located on the opposite side of the first surface 24a, and an end surface 24c connecting the first surface 24a and the second surface 24b.

[0052] The first surface 24a of the cover 24 has an operating portion 26 for operating the cover 22. As shown in FIG5, the operating portion 26 has a circular recess 26a formed in the center of the first surface 24a and a protrusion 26b formed in the center of the recess 26a.

[0053] The second surface 24b of the cover portion 24 is integrally formed with the connecting portion 25. The second surface 24b is configured to face downwards, that is, to face the bottom surface 10a in the second recess 10 of the machined part 2.

[0054] The end face 24c of the cover 24 has a groove 27 that serves as a retaining portion for holding the sealing body 23. As shown in FIG5, the groove 27 is formed in an annular shape along the circumference of the end face 24c.

[0055] The connecting portion 25 includes a threaded shaft 25a that is concentric with the cover portion 24. The threaded shaft 25a is inserted into the internal thread 12a formed in the cylindrical portion 12 of the retainer 3.

[0056] According to the structure described, the cover 22 is detachably mounted to the retainer 3. When the cover 22 is mounted to the retainer 3, the connecting portion 25 of the cover 22 is configured to be concentric with the front end of the cylindrical portion 12 of the retainer 3. The operator grasps the protrusion 26b of the operating portion 26 and rotates it, thereby engaging the threaded shaft 25a with the internal thread 12a of the cylindrical portion 12. When the cover 22 is removed from the retainer 3, the threaded shaft 25a is pulled out of the cylindrical portion 12 by rotating the protrusion 26b of the operating portion 26.

[0057] The sealing body 23 may include, for example, an annular elastic member (O-ring), but the structure of the sealing body 23 is not limited to this embodiment. The sealing body 23 is inserted into the groove 27 of the cover portion 24 in such a way that a portion of it protrudes from the groove 27 of the cover portion 24.

[0058] As shown in Figure 1, the sealing body 23 is in close contact with the side wall surface 10b of the second recess 10 when the cover portion 24 of the cover body 22 is inserted into the second end face 8b of the workpiece 2. The sealing body 23 is held between the side wall surface 10b of the second end face 8b of the workpiece 2 and the end face 24c of the cover portion 24, thereby sealing the end face 24c of the cover portion 24 and the side wall surface 10b of the workpiece 2.

[0059] Hereinafter, the method for manufacturing a glass plate using the processing apparatus 1 of this embodiment will be described with reference to FIG6.

[0060] This method includes, for example, a processing step of machining the end face of a glass plate G formed into a rectangular shape. The processing steps include: a first processing step of grinding the glass plate G using a first processing device 1A and a first supply device 28, and a second processing step of polishing the glass plate G using a second processing device 1B and a second supply device 29. The first processing device 1A and the second processing device 1B have the same structure as the processing device 1. The only difference from the first processing device 1A and the second processing device 1B is the structure (material, etc.) of the processing section 7.

[0061] In this embodiment, in each processing step, the end face of the glass plate G is processed by moving the glass plate G relative to each processing device 1A, 1B and each supply device 28, 29. In this embodiment, an example is shown where processing is performed while the glass plate G is moved along the conveying direction X using a conveying device (not shown) without moving the processing devices 1A, 1B and each supply device 28, 29; however, the present invention is not limited to this example. In each processing step, the glass plate G can also be processed by moving the processing devices 1A, 1B and each supply device 28, 29 while the glass plate G is supported by a pressure plate without moving it.

[0062] In the first processing step, while the grinding fluid L1 is supplied to the workpiece 2 by the first supply device 28, the end face of the glass plate G is ground by the workpiece 2 of the first processing device 1A rotating about the rotation axis CR1. The first supply device 28 has a nozzle 28a disposed near the first processing device 1A. The grinding fluid L1 sprayed from the nozzle 28a is, for example, water.

[0063] The second processing device 1B is positioned downstream of the first processing device 1A in the conveying direction X of the glass plate G. In the second processing step, while the polishing fluid L2 is supplied to the workpiece 2 via the second supply device 29, the end face of the glass plate G is polished by the workpiece 2 of the second processing device 1B, which rotates about the rotation axis CR2. The second supply device 29 has a nozzle 29a positioned near the second processing device 1B. Water is used, for example, as the polishing fluid L2 ejected from the nozzle 29a.

[0064] During the execution of each processing step, droplets of liquids such as grinding fluid and polishing fluid may sometimes reach the upper part of the workpiece 2. In this case, the upper part of the workpiece 2 is sealed by the sealing member 6, thereby preventing liquid from seeping into the space 9c through the second recess 10 and the first through hole 8c of the workpiece 2. This prevents liquid from accumulating in the space 9c, thereby preventing deterioration of the rotational balance of the workpiece 2.

[0065] The inventors conducted the following research when completing this invention. As described above, the flange portion 13 of the retainer 3 supports the workpiece 2 with its first surface 13a (support surface 15) in contact with the first end surface 8a (bottom surface 9a of the first recess 9) of the workpiece 2. In this state, the first surface 13a of the flange portion 13 closes the space 9c formed in the first end surface 8a of the workpiece 2. In this state, liquid is less likely to seep between the first surface 13a of the flange portion 13 and the first end surface 8a of the workpiece 2. Nevertheless, in the processing apparatus 1 excluding the sealing member 6, liquid may sometimes accumulate in the space 9c.

[0066] This phenomenon is believed to be caused by vibrations and other effects resulting from the impact when the glass plate G comes into contact with the workpiece 2. Based on confirming this phenomenon of liquid seepage and retention in the space 9c, the inventors discovered that even when the flange portion 13 of the retainer 3 blocks the space 9c of the workpiece 2, the deterioration of the rotational balance of the workpiece 2 can be effectively prevented by installing the sealing member 6 on the workpiece 2.

[0067] Figures 7 and 8 illustrate the second embodiment of the present invention. In the processing apparatus 1 of this embodiment, the structure of the sealing member 6 differs from that of the first embodiment. As shown in Figure 7, the sealing member 6 covers the entire second recess 10 on the second end face 8b of the processed part 2 by means of the cover portion 24 of the cover body 22.

[0068] The cover 22 of the sealing member 6 has a groove 27 on the second surface 24b of the cover portion 24 to hold the sealing body 23. As shown in FIG8, the groove 27 is configured in an annular shape to surround the threaded shaft 25a of the connecting portion 25. An O-ring, which serves as the sealing body 23, is embedded in the groove 27.

[0069] The diameter of the groove 27 is larger than the diameter of the second recess 10. According to this structure, the sealing body 23 held in the groove 27 contacts a portion 8b1 on the second end face 8b of the workpiece 2 that is further outward than the second recess 10. The sealing body 23 is held between the second end face 8b (outer portion 8b1) of the workpiece 2 and the second face 24b of the cover 24 at a position further outward than the second recess 10, thereby sealing them together.

[0070] The operating portion 26 formed on the first surface 24a of the cover portion 24 in the cover body 22 does not have the protrusion 26b illustrated in the first embodiment, but only has a recess 26a. As shown in FIG8, the recess 26a has a polygonal (e.g., hexagonal) sidewall surface. In this embodiment, by rotating the cover body 22 using a tool that engages with the recess 26a of the operating portion 26, the connecting portion 25 of the cover body 22 can be attached to or detached from the cylindrical portion 12 of the retainer 3.

[0071] According to this embodiment, by means of the structure of the sealing member 6 as described above, it is possible to reliably prevent liquids such as grinding fluid and polishing fluid from seeping into the second recess 10 on the second end face 8b of the workpiece 2.

[0072] Furthermore, the present invention is not limited to the structure of the described embodiments, nor is it limited to the described effects. Various modifications can be made to the present invention without departing from its spirit.

[0073] In the second embodiment, an example is shown where a second recess 10 is formed on the second end face 8b of the workpiece 2, but the present invention is not limited to this structure. The processing apparatus 1 may also not have a second recess 10 on the second end face 8b of the workpiece 2. In this case, the second end face 8b of the workpiece 2 can be configured as a single surface, and the sealing member 6 can be installed on the workpiece 2 in such a way that the first through hole 8c located in the center of the second end face 8b is closed.

[0074] In the described embodiment, a sealing member 6 including a sealing body 23 mounted on the cover 22 is illustrated, but the present invention is not limited to this structure. The sealing member 6 may also include the cover 22 and a sealing body mounted on the second end face 8b of the workpiece 2. In this case, a retaining portion such as a groove for retaining the sealing body may also be provided on the second end face 8b of the workpiece 2. Furthermore, in the described embodiment, the space portion 9c is provided on the workpiece 2, but it may also be provided on the retaining member 3. In this case, the space portion 9c may be provided only on the retaining member 3, or it may be provided on both the retaining member 3 and the workpiece 2.

[0075] 1: Processing equipment 1A: First processing device (processing unit) 1B: Second processing unit (processing device) 2: Machined parts 3: Retaining components 4: Spindle 4a, 18a, 19a: Shaft portion 5a: First fastener 5b: Second fastener 6: Sealing components 7: Machining Department 8: Main body 8a: First end face 8b: Second end face 8b1: Outer part 8c: First through hole 8d: Second through hole 9: First concave part 9a, 10a: Bottom surface 9b, 10b: Sidewall surfaces 9c: Space Department 10: The second concave part 11: Maintaining Section 12:Tubular part 12a: Internal thread 13: Flange (Support Part) 13a, 24a: First page 13b, 24b: Second page 13c, 24c: End face 14: Shaft insertion hole 14a: Inner surface (contact surface) 15: Support surface 16, 17: Fixing holes 18b, 19b: Head 19: Bolts 20: Press plate 20a: Hole 21: Maintaining Section 22: Cover 23: Sealing body 24: Cover part 25: Connecting parts 25a: Threaded shaft 26: Operations Department 26a: concave part 26b: Protrusion 27: Groove 28: First supply unit (supply device) 28a, 29a: Nozzle 29: Second supply device (supply unit) CR1, CR2: Rotation axis G: Glass plate L1: grinding fluid L2: Grinding fluid S: Gap X: Transport direction

Claims

1. A tool component, comprising: A cylindrical workpiece used for machining the end face of a glass plate, and capable of rotation; The tool assembly includes a retainer for holding the workpiece and is rotatable, characterized in that it includes a space portion disposed on the workpiece and used for adjusting the balance of rotation. The device includes a sealing member to prevent liquid from entering the space. The processing member includes a main body portion configured as a cylinder and a processing portion formed on the outer peripheral surface of the main body portion for processing the glass plate. The main body portion has a first end face formed at one end in the direction of the cylinder core and a second end face located on the opposite side of the first end face. The retaining member has a support portion for supporting the first end face. The space portion is formed on the first end face.

2. The tool component as described in claim 1, wherein, The space is covered by the retainer and is thus disposed inside the tool assembly.

3. The tool component as described in claim 2, wherein, The retainer has a support surface that supports the workpiece, and the space is covered by the support surface.

4. The tool component as described in claim 1, wherein, The workpiece has a through hole extending from the first end face to the second end face, and the sealing member is disposed on the second end face in a manner that closes the through hole.

5. The tool component as described in claim 4, wherein, The sealing member includes: a cover body for blocking the through hole; and a sealing body for sealing the cover body and the second end face of the workpiece.

6. The tool component as described in claim 5, wherein, The retainer has a cylindrical portion disposed at the center of the support portion, and the cover has a connecting portion connected to the cylindrical portion.

7. The tool component as described in claim 5 or 6, wherein, The cover is made of resin.

8. A processing apparatus, characterized in that it comprises: The tool component as described in any one of claims 1 to 7; And a rotation axis to rotate the tool assembly.

9. A method for manufacturing a glass plate, characterized in that it includes the step of processing the end face of the glass plate using the processing apparatus as described in claim 8.

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