JP7428974B2 - Glass plate manufacturing method and tool for grinding device - Google Patents

Description

The present invention provides a method for manufacturing a glass plate that includes a step of removing a grindstone holder (e.g., a grindstone flange) and a grindstone from a spindle provided in a rotary grindstone device, and a process of releasing the fitting between the spindle and the grindstone holder during removal. This invention relates to a tool for a grindstone device.

As is well known, the manufacturing process of a glass plate often includes an end face processing process in which the end face of the glass plate is subjected to grinding or polishing using a grindstone. It is customary to use a rotary grindstone device equipped with a grindstone to execute the end face machining process. Here, an example of a rotary grindstone apparatus is disclosed in Patent Document 1, in which the end face of a wafer is processed instead of the end face of a glass plate.

The device disclosed in the document includes a spindle (motor rotating shaft 40) whose tip end is tapered, and a grindstone flange (flange main body) in which a tapered hole (hole 18) that fits into the spindle is formed. 12), a fixture (hexagonal cap bolt 34) that fixes the spindle and grinding wheel flange in a fitted state, and a fixing device (hexagonal cap bolt 34) that fixes the spindle and grinding wheel flange in a fitted state; It includes a rotating annular grindstone (grindstone 50).

Incidentally, it is necessary to use different grindstones depending on the type of glass plate to be processed (dimensions, material, chamfer shape, required quality), and for this purpose, the grindstone flange and the grindstone may be replaced. In Patent Document 1, when replacing the grindstone flange and the grindstone, first, the grindstone is removed from the shaft portion of the grindstone flange, and in this state, the fixation between the spindle and the grindstone flange by the fixture is released. Next, the fit between the spindle and the grindstone flange, which are in the unlocked state, is released. Here, since the spindle and the grindstone flange are tightly fitted and in close contact with each other, a tool for the grindstone device is used to release the fitting. An example of this tool for a grindstone device is disclosed in Patent Document 1.

The tool disclosed in this document has a female thread that engages with a male thread formed on the outer circumferential surface of the shaft of the grindstone flange, and is fixed to the outer circumferential surface of the shaft using the engagement of both screws. A possible first member (disc 44) and a male screw that engages with a female screw formed on the inner circumferential surface of the through hole of the first member are formed, and the engagement of both screws is used to rotate the screw in the axial direction of the spindle. A second member (pull bolt 46) that can be fed and moved.

When releasing the fitting between the spindle and the grindstone flange using the above tool, the first member is fixed to the outer peripheral surface of the shaft of the grindstone flange, and the second member is inserted into the through hole of the first member. The tip of the spindle is inserted into the second member while being rotated so that the tip of the spindle and the second member come into contact with each other. In this state, by further rotating the second member, the second member is fed and moved relative to the first member toward the spindle. Along with this, the grindstone flange moves away from the spindle together with the first member, so the tip of the spindle is pushed out of the hole in the grindstone flange, and the fit between the spindle and the grindstone flange is released.

Japanese Patent Application Publication No. 2005-212066

However, when the above tool is used to disengage the spindle from the grindstone flange (grindstone holder), there are problems to be solved as described below.

That is, when releasing the fitting using the above tool, from the viewpoint of preventing interference between the first member and the grinding wheel, before fixing the first member to the outer peripheral surface of the shaft of the grinding wheel flange. , it is necessary to remove the grindstone from the outer peripheral surface of the shaft. Therefore, each time the grindstone flange and the grindstone are removed from the spindle, it is required to remove the grindstone from the grindstone flange one by one. Here, the whetstone needs to be attached to the whetstone flange in a centered state, so in order to use this whetstone again, it is necessary to attach the whetstone flange to the whetstone and also perform centering work. there were.

Under these circumstances, it has been expected to establish a technique that can efficiently remove both the grindstone flange and the grindstone from the spindle. The present invention was developed in view of the above circumstances, and a technical problem is to improve the efficiency of the work when removing a grindstone holder and a grindstone from a spindle provided in a rotary grindstone device.

The present invention, which was created to solve the above problems, provides a spindle, a grinding wheel holder that has a hollow part in addition to a hole that fits into the spindle, and a state in which the spindle and the grinding wheel holder are fitted together. A method for manufacturing a glass plate, which includes a step of removing a grindstone holder and a grindstone from a spindle, for a rotary grindstone device equipped with a fixture for fixing and an annular grindstone that rotates around a spindle while attached to a grindstone holder. The removing step includes a fixing release step of releasing the fixation between the spindle and the grinding wheel holder by the fixing device, and a fitting of the spindle and the grinding wheel holder in the released state using a tool for the grinding device. The method includes a disengagement step of disengaging the fitting, and is characterized in that the tool for the grindstone device can be fixed in the hollow portion.

In this method, since it is possible to fix the tool for the grindstone device in the hollow part of the grindstone holder, it is possible to reliably eliminate the possibility that the tool for the grindstone device will interfere with the grindstone when performing the unfitting process. Therefore, it is naturally possible to eliminate the need to remove the grindstone from the grindstone holder when performing the unfitting process. As a result, the work (removal process) for removing the grindstone holder and the grindstone from the spindle can be made more efficient.

In the above method, the hollow part is continuous with the hole part and is formed along the hole axis direction of the hole part, and the tool for the grinding device includes a first member that can be fixed to the hollow part, and a spindle for the first member. The second member is movable relative to the first member in the axial direction, and the second member is moved relative to the first member by feeding movement, and in the unfitting process, the grindstone holder and the first member are The fitting between the spindle and the whetstone holder is released by moving the first member and the second member relative to each other in a fixed state and with the tip of the spindle and the second member in contact with each other. You can.

Here, if an impact is applied to the grindstone holder or the grindstone in the unfitting process, a positional shift occurs between the grindstone holder and the grindstone. If the grindstone holder and grindstone in this state are reattached to the spindle and the end face machining step is performed, there is a risk that the machined end face will be undulated and the properties of the end face may deteriorate. In the above configuration, the spindle and the grindstone holder are disengaged from each other by relatively moving the first member and the second member while the tip of the spindle and the second member are in contact with each other. This relative movement of the second member with respect to the first member is performed by feeding movement. That is, with the tip of the spindle and the second member in contact with each other, the tip of the spindle is removed from the hole of the grindstone holder as the feed moves. Therefore, when performing the unfitting step, it is possible to eliminate the need to apply an impact to any of the grindstone device tools (first member and second member), the grindstone holder, and the grindstone. As a result, it is possible to prevent misalignment between the grindstone holder and the grindstone when performing the unfitting step. Therefore, even if these grindstone holders and grindstones are attached to the spindle again and the end face of the glass plate is processed, it is possible to avoid the occurrence of waviness on the processed end face, and it is possible to prevent deterioration of the properties of the end face. .

In the above method, in the unfitting process, the meshing between the female thread formed on the inner peripheral surface of the hollow part and the male thread formed on the outer peripheral surface of the first member is used to connect the grinding wheel holder and the first member. It is preferable to fix one member.

In this way, it becomes possible to fix and release the grindstone holder and the first member by simply using a screw mechanism, which is a simple mechanism. Moreover, by employing a simple mechanism, it is also possible to reduce the cost of manufacturing a tool for a grindstone device.

In the above method, a hole is formed in the first member, and the second member has a round rod-shaped portion extending in the axial direction of the spindle, and in the unfitting process, the inner periphery of the hole in the first member is It is preferable to feed and move the second member relative to the first member by utilizing the engagement between the female thread formed on the surface and the male thread formed on the outer peripheral surface of the rod-shaped portion of the second member.

In this way, it becomes possible to relatively move the first member and the second member simply by using a screw mechanism, which is a simple mechanism. Moreover, it is further advantageous in reducing the cost of manufacturing a tool for a grindstone device. In addition, since the torque applied to the tool can be converted into a force applied in the axial direction of the spindle, the spindle and grindstone holder can be uncoupled by simply applying as little force as possible to the tool. be able to.

In the above method, it is preferable that the second member has a handle portion connected to the rod-shaped portion and extending in the radial direction of the rod-shaped portion.

In this way, the presence of the handle portion makes it easier to apply rotational torque to the rod-shaped portion of the second member. Therefore, the rod-shaped portion can be easily rotated to send the second member in the axial direction of the spindle.

In the above method, the tool for a grindstone device includes a first rod member that can be fixed in the hollow part, a weight that can be slid along the longitudinal direction of the first rod member, and a regulating member that restricts the sliding range of the weight. In the unfitting process, the spindle and the grindstone holder may be unfitted by colliding the weight with the regulating member.

In this way, simply by causing the weight and the regulating member to collide, the spindle and the grindstone holder can be disengaged from each other by utilizing the impact generated at that time. Therefore, it becomes possible to easily perform the work for removing the grindstone holder and the grindstone from the spindle.

In the above method, it is preferable that the regulating member is a second rod member connected to the first rod member and extending in the radial direction of the first rod member.

In this way, the structure of the tool for the grinding wheel device can be simplified, so that it is possible to reduce the cost of manufacturing the tool for the grinding wheel device.

In the above method, it is preferable that the second rod member is connected to the end of the first rod member, and that the first rod member and the second rod member form a T-shape.

In this way, it becomes possible to easily and reliably restrict the sliding range of the weight that slides along the longitudinal direction of the first member.

In the above method, the tool for the grinding device is preferably constructed of stainless steel.

In this way, it is possible to suitably prevent rust from forming on the tool for the grindstone device due to the grinding liquid, polishing liquid, etc. used when processing the end face of the glass plate with the rotary grindstone device.

The present invention, which was created to solve the above problems, also provides a spindle, a grindstone holder having a hollow part in addition to a hole that fits into the spindle, and a spindle and grindstone holder fitted together. Regarding a rotary grindstone device equipped with a fixture that fixes the grindstone in place and an annular whetstone that rotates around the spindle while attached to the whetstone holder, when removing the whetstone holder and the whetstone from the spindle, it is necessary to fix the whetstone with the fixture. This is a tool for a grindstone device for releasing the fit between a spindle and a grindstone holder that are in a released state, and is characterized in that it can be fixed in a hollow portion.

According to this tool, it is possible to obtain the same functions and effects as those already described in the explanation regarding the method for manufacturing a glass plate.

In the above configuration, the hollow part is continuous with the hole part and is formed along the hole axis direction of the hole part, and includes a first member that can be fixed to the hollow part, and a first member that is fixed to the first member in the axial direction of the spindle. The spindle may include a second member that can be fed and moved and that can come into contact with the tip of the spindle.

In this way, it becomes possible to obtain the same functions and effects as those already described in the explanation regarding the method for manufacturing the glass plate.

In the above configuration, the first rod member that can be fixed to the hollow part, the weight that can be slid along the longitudinal direction of the first rod member, and the regulating member that restricts the range of sliding of the weight may be provided. good.

In this way, it becomes possible to obtain the same functions and effects as those already described in the explanation regarding the method for manufacturing the glass plate.

According to the present invention, when removing a grindstone holder and a grindstone from a spindle provided in a rotary grindstone device, it is possible to improve the efficiency of the work.

FIG. 3 is a longitudinal sectional front view showing the rotary grindstone device. FIG. 3 is a longitudinal sectional front view showing a fixing release step in the glass plate manufacturing method according to the first embodiment of the present invention. 1 is a longitudinal sectional front view showing a tool for a grindstone device according to a first embodiment of the present invention. It is a vertical front view showing the unfitting process in the manufacturing method of the glass plate concerning the first embodiment of the present invention. It is a vertical front view showing the unfitting process in the manufacturing method of the glass plate concerning the first embodiment of the present invention. It is a vertical front view showing the unfitting process in the manufacturing method of the glass plate concerning the first embodiment of the present invention. It is a vertical front view showing the unfitting process in the manufacturing method of the glass plate concerning the first embodiment of the present invention. It is a front view which shows the tool for grindstone apparatuses based on 2nd embodiment of this invention. It is a front view which shows the unfitting process in the manufacturing method of the glass plate based on 2nd embodiment of this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for manufacturing a glass plate and a tool for a grindstone device according to an embodiment of the present invention will be described with reference to the accompanying drawings. In addition, in the attached drawings, the locations indicated by thick lines indicate that screws are formed.

<First embodiment>
The method for manufacturing a glass plate according to the present embodiment includes a step of removing a grindstone holder and a grindstone from a spindle provided in a rotary grindstone device, as described below. First, the configuration of the rotating grindstone device will be explained.

As shown in FIG. 1, the rotary grindstone device 1 includes a spindle 2, a grindstone flange 3 (grindstone holder) in which a hole 3a that fits into the spindle 2 is formed, and a spindle 2 and the grindstone flange 3 that are fitted together. It is provided with a bolt 4 and a presser plate 5 as fixing devices for fixing the grinding wheel in the fixed state, and an annular grindstone 6 that rotates around the spindle 2 while being attached to the grindstone flange 3.

The spindle 2 has a tapered tip 2a. The distal end portion 2a is formed such that its outer diameter decreases from the lower side to the upper side (from the proximal end side to the distal end side). A female thread (not shown) that engages with a male thread (not shown) formed on the bolt 4 is formed inside the tip 2a. The spindle 2 rotates together with the grindstone flange 3 and the grindstone 6 as power is transmitted from a drive device (not shown) such as a motor.

The grindstone flange 3 has a flange portion 3b that supports the grindstone 6 from below, and a shaft portion 3c that continues above the flange portion 3b.

The hole 3a formed in the flange portion 3b is formed in a tapered shape to fit into the tip end 2a of the spindle 2, and is formed so that the inner diameter thereof decreases from the lower side to the upper side. In this embodiment, the upper end of the hole 3a and the tip of the spindle 2 are flush with each other, but the upper end position of the hole 3a (the bottom position of the hollow part 3d, which will be described later) is lower than the tip of the spindle 2. It can also be expensive. The hole axis of this hole portion 3a coincides with the axis of the spindle 2.

A hollow portion 3d that is continuous with the hole portion 3a is formed in the shaft portion 3c. Thereby, the shaft portion 3c is formed into a cylindrical shape. The hollow portion 3d is formed along the hole axis direction of the hole portion 3a and has a circular opening shape. The inner diameter of the circle formed by this opening is larger than the inner diameter at the upper end (upper end of the taper) of the hole 3a. Further, the hole axis of the hollow portion 3d coincides with the axis of the spindle 2, similar to the hole axis of the hole portion 3a. Further, a female thread 3e is formed on the inner peripheral surface of the hollow portion 3d.

The bolt 4 passes through a hole (not shown) formed in the holding plate 5, and is fastened to the tip 2a of the spindle 2 with its head holding the holding plate 5 against the spindle 2 side. . By tightening this bolt 4, the spindle 2 and the grindstone flange 3 are fixed.

The grindstone 6 is attached to the grindstone flange 3 so that the center of the ring formed by the grindstone 6 coincides with the axis of the spindle 2. The grindstone 6 is attached to the grindstone flange 3 using bolts (not shown). Grooves (not shown) for processing the end surface of a glass plate are formed in the outer circumferential surface of the grindstone 6 in a plurality of upper and lower stages.

Next, the above-mentioned removal process will be explained.

The removal process includes a fixing release process (FIG. 2) in which the fixation between the spindle 2 and the grindstone flange 3 by the bolts 4 and the presser plate 5 is released, and a fitting process between the spindle 2 and the grindstone flange 3 in the released state. This includes a disengagement step (FIGS. 4 to 7) in which the fitting is released by the grindstone device tool 7 (FIG. 3).

In the fixing release process, as shown in FIG. 2, the bolt 4 fastened to the tip 2a of the spindle 2 is loosened and removed, and the presser plate 5 is removed. This completes the fixing release step. After the fixing release process is completed, the spindle 2 and the grindstone flange 3 are still firmly fitted and in close contact with each other.

When the fixing release process is completed, a fitting release process is then performed. Here, the configuration of the grindstone device tool 7 used in the unfitting step will be described.

As shown in FIG. 3, the grindstone device tool 7 includes a first member 8 formed in a bolt shape and a second member 9 formed in a T-shape. Although the material of this grindstone device tool 7 is not particularly limited, stainless steel is adopted as the material in this embodiment.

The first member 8 has a main body 8a and a head 8b connected to one end of the main body 8a. Further, the first member 8 has a hole 8c formed therethrough, and a female thread 8d is formed on the inner peripheral surface of the hole 8c. On the other hand, a male thread 8e is formed on the outer peripheral surface of the main body portion 8a, and this male thread 8e is adapted to mesh with a female thread 3e formed on the inner peripheral surface of the hollow portion 3d of the grindstone flange 3. The head 8b has an outer diameter one size larger than the main body 8a, and the outer diameter of the head 8b is larger than the inner diameter of the circle formed by the opening of the hollow portion 3d of the grindstone flange 3. Further, the outer diameter of the head 8b is smaller than the inner diameter of the ring (circular ring) formed by the grindstone 6.

The second member 9 has a round rod-shaped rod portion 9a and a handle portion 9b connected to the rod portion 9a and extending in the radial direction of the rod portion 9a. The outer diameter of the rod-shaped portion 9a is smaller than the inner diameter at the upper end of the hole 3a of the grindstone flange 3. A male thread 9c is formed on the outer peripheral surface of the rod-shaped portion 9a, and this male thread 9c is adapted to mesh with a female thread 8d formed on the inner peripheral surface of the hole 8c of the first member 8. As a result, the handle is held in a state where the female thread 8d formed on the inner circumferential surface of the hole 8c of the first member 8 and the male thread 9c formed on the outer circumferential surface of the rod-shaped portion 9a of the second member 9 are engaged. When the rod-shaped portion 9a is rotated by operating the portion 9b, the second member 9 is fed and moved relative to the first member 8 along the longitudinal direction of the rod-shaped portion 9a.

In the unfitting process using the tool 7 for the grindstone device, first, as shown in FIG. Fix it. Specifically, the female thread 3e formed on the inner circumferential surface of the hollow portion 3d of the grindstone flange 3 and the male thread 8e formed on the outer circumferential surface of the main body portion 8a of the first member 8 are engaged with each other while relative rotation is performed. By doing so, the first member 8 is attached to the whetstone flange 3, and the head 8b of the first member 8 is brought into contact with the shaft portion 3c of the whetstone flange 3.

Next, as shown in FIG. 5, a female thread 8d formed on the inner peripheral surface of the hole 8c of the first member 8 and a male thread 9c formed on the outer peripheral surface of the rod-shaped portion 9a of the second member 9 are connected. Bite together. At this time, the rod-shaped portion 9a of the second member 9 is in a state extending in the axial direction of the spindle 2. Then, while engaging both screws 8d and 9c, the handle portion 9b of the second member 9 is operated to rotate the rod-shaped portion 9a. Along with this, the rod-shaped portion 9a is sent toward the spindle 2 (lower side) and moves relative to the first member 8.

As the rod-shaped portion 9a is fed toward the spindle 2 as described above, the rod-shaped portion 9a eventually comes into contact with the tip of the spindle 2, as shown in FIG. 6, and the rod-shaped portion 9a becomes unable to move downward any further. Become. From this state, the handle portion 9b of the second member 9 is further operated to rotate the rod portion 9a, thereby moving the rod portion 9a toward the spindle 2 relative to the first member 8. In this case, since the rod-shaped portion 9a cannot move downward, the first member 8 moves away from the spindle 2 (upward) as shown in FIG. At this time, the grindstone flange 3, which is fixed to the first member 8, also moves upward. Accordingly, the hole 3a of the grindstone flange 3 is lifted up from the tip 2a of the spindle 2, and the fitting between the spindle 2 and the grindstone flange 3 is released.

With the above, the unfitting step is completed, and all steps included in the removing step are completed. As a result, the grindstone flange 3 and the grindstone 6 are removed from the spindle 2 provided in the rotary grindstone device 1.

Hereinafter, the main functions and effects of the above glass plate manufacturing method will be explained.

In the above method, since the first member 8 (grinding device tool 7) is fixed to the hollow portion 3d of the grinding wheel flange 3 when performing the unfitting process, the possibility of interference with the grinding wheel 6 can be reliably eliminated. Therefore, it is naturally possible to eliminate the need to remove the grindstone 6 from the grindstone flange 3 when performing the unfitting process. As a result, the efficiency of the work for removing the grindstone flange 3 and the grindstone 6 from the spindle 2 can be improved.

The second embodiment will be described below. In addition, in the description of the second embodiment, elements that are substantially the same as those already explained in the first embodiment above will be designated by the same reference numerals in the drawings referred to in the description of the second embodiment. The detailed explanation will be omitted, and only the differences from the first embodiment will be explained.

<Second embodiment>
As shown in FIGS. 8 and 9, the second embodiment is different from the first embodiment described above in the configuration of the grindstone device tool 7 used in the unfitting process and in the unfitting process. This is the mode of execution.

The grindstone device tool 7 includes a vertical rod 10 as a first rod member that can be fixed to a hollow portion 3d (not shown) of the grindstone flange 3, and a weight that can slide up and down along the longitudinal direction of the vertical rod 10. 11, and a horizontal bar 12 as a regulating member (second bar member) that regulates the sliding range of the weight 11.

The upper end of the vertical rod 10 is connected to the center of the horizontal rod 12, and both 10 and 12 form a T-shape. Note that the horizontal rod 12 extends in the radial direction of the vertical rod 10. Here, as a modification of this embodiment, the vertical rod 10 and the horizontal rod 12 may be crossed so that both 10 and 12 form a cross shape. In this embodiment, a male thread 10b is formed on the outer peripheral surface of the lower end 10a of the vertical rod 10, and as the vertical rod 10 is rotated by operating the horizontal rod 12, the hollow portion 3d of the grindstone flange 3 is opened. It is possible to engage with a female thread 3e (not shown) formed on the inner circumferential surface of. Thereby, the hollow portion 3d of the grindstone flange 3 and the vertical rod 10 are fixed. Further, the weight 11 is formed with a through hole (not shown), and an intermediate portion between the lower end 10a and the upper end of the vertical rod 10 is inserted into the through hole. Therefore, the weight 11 can slide up and down along the longitudinal direction of the vertical rod 10. The inner diameter of the through hole of the weight 11 is larger than the outer diameter of the intermediate portion of the vertical rod 10 and smaller than the outer diameter of the lower end portion 10a of the vertical rod 10. Therefore, the range in which the weight 11 can slide is limited between the lower end 10a and the upper end (horizontal rod 12) of the vertical rod 10.

In the unfitting step using the above-mentioned grindstone device tool 7, the weight 11 slid along the vertical rod 10 is caused to collide with the horizontal rod 12, as shown by arrow A in FIG. This collision may occur only once, or may occur multiple times. The impact at this time is used to release the mating. This second embodiment also provides the same main functions and effects as the first embodiment.

Here, the method for manufacturing a glass plate and the tool for a grindstone device according to the present invention are not limited to the aspects and configurations described in the above embodiments. For example, in the embodiments described above, a screw mechanism is used to fix the first member or the vertical rod to the grindstone flange, but the invention is not limited to this. The first member or the vertical rod may be fixed to the grindstone flange by using a chuck mechanism having claws or the like instead of the screw mechanism.

Further, in the first embodiment described above, a screw mechanism is used to feed and move the second member relative to the first member, but the invention is not limited to this. The first member and the second member may be fed and moved by using a rack and pinion mechanism instead of the screw mechanism. In this case, a pinion may be provided on the first member, and a rack may be provided on the second member, and the second member may be fed and moved relative to the first member as the pinion rotates.

Further, in the embodiments described above, a grindstone flange is used as a grindstone holder to which a grindstone is attached, but the present invention is not limited to this. A grindstone holder having another shape may be used instead of the grindstone flange, as long as it has a hollow part in addition to the hole that fits into the spindle. Furthermore, in the second embodiment described above, the hollow portion only needs to be capable of fixing the first rod member (vertical rod 10), and does not need to be continuous with the hole.

1 Rotary grindstone device 2 Spindle 2a Tip portion 3 Grindstone flange (grindstone holder)
3a Hole 3d Hollow part 3e Female thread 4 Bolt 5 Holding plate 6 Grindstone 7 Tool for grindstone device 8 First member 8c Hole 8d Female thread 8e Male thread 9 Second member 9a Rod-shaped part 9b Handle part 9c Male thread 10 Vertical rod 11 Weight 12 horizontal bar

Claims (10)

A spindle, a grindstone holder having a hollow part in addition to a hole that fits into the spindle, a fixture that fixes the spindle and the grindstone holder in a fitted state, and a fixture attached to the grindstone holder. A method for producing a glass plate, comprising a step of removing the grindstone holder and the grindstone from the spindle, for a rotating grindstone device comprising an annular grindstone that rotates around the spindle in a state where the grindstone is rotated around the spindle,
The removing step includes a fixing release step of releasing the fixing between the spindle and the grindstone holder by the fixing tool, and a fixing release step of releasing the fixation between the spindle and the grindstone holder by the fixing tool, and a fitting of the spindle and the grindstone holder in the released state. and an unmating step of unmating using a tool,
The tool for the grindstone device can be fixed in the hollow part ,
The hollow portion is continuous with the hole and is formed along the hole axis direction of the hole,
The tool for a grindstone device has a first member that can be fixed to the hollow portion, and a second member that is movable relative to the first member in the axial direction of the spindle,
Relative movement of the second member with respect to the first member is performed by a feeding movement,
In the unfitting process, the first member and the second member are fixed, and the tip of the spindle is in contact with the second member. A method for manufacturing a glass plate , characterized in that the spindle and the grindstone holder are disengaged from each other by relatively moving the spindle and the grindstone holder . In the unfitting step, the grindstone holder and the first member are connected by utilizing the engagement between the female thread formed on the inner circumferential surface of the hollow part and the male thread formed on the outer circumferential surface of the first member. 2. The method for manufacturing a glass plate according to claim 1 , further comprising fixing one member. A hole is formed in the first member, and the second member has a round rod-shaped portion extending in the axial direction of the spindle,
The unfitting step utilizes engagement between a female screw formed on the inner peripheral surface of the hole of the first member and a male screw formed on the outer peripheral surface of the rod-shaped portion of the second member. The method for manufacturing a glass plate according to claim 1 or 2 , characterized in that the second member is fed and moved relative to the first member. 4. The method of manufacturing a glass plate according to claim 3 , wherein the second member has a handle portion connected to the rod-shaped portion and extending in a radial direction of the rod-shaped portion. A spindle, a grindstone holder having a hollow part in addition to a hole that fits into the spindle, a fixture that fixes the spindle and the grindstone holder in a fitted state, and a fixture attached to the grindstone holder. A method for producing a glass plate, comprising a step of removing the grindstone holder and the grindstone from the spindle, for a rotating grindstone device comprising an annular grindstone that rotates around the spindle in a state where the grindstone is rotated around the spindle,
The removing step includes a fixing release step of releasing the fixing between the spindle and the grindstone holder by the fixing tool, and a fixing release step of releasing the fixation between the spindle and the grindstone holder by the fixing tool, and a fitting of the spindle and the grindstone holder in the released state. and an unmating step of unmating using a tool,
The tool for the grindstone device can be fixed in the hollow part,
The grindstone device tool includes a first bar member that can be fixed in the hollow portion, a weight that is slidable along the longitudinal direction of the first bar member, and a regulating member that regulates a sliding range of the weight. have,
A method for manufacturing a glass plate, wherein in the unfitting step, the spindle and the grindstone holder are unfitted by colliding the weight and the regulating member. 6. The method of manufacturing a glass plate according to claim 5 , wherein the regulating member is a second rod member connected to the first rod member and extending in a radial direction of the first rod member. The glass according to claim 6 , wherein the second rod member is connected to an end of the first rod member, and the first rod member and the second rod member form a T-shape. Method of manufacturing the board. The method for manufacturing a glass plate according to any one of claims 1 to 7 , wherein the tool for the grindstone device is made of stainless steel. A spindle, a grindstone holder having a hollow part in addition to a hole that fits into the spindle, a fixture that fixes the spindle and the grindstone holder in a fitted state, and a fixture attached to the grindstone holder. Regarding a rotary grindstone device including an annular grindstone that rotates around the spindle in a state where the grindstone is fixed, when the grindstone holder and the grindstone are removed from the spindle, the spindle is in a state where the fixation by the fixture is released. A tool for a grinding wheel device for releasing the fitting between the grinding wheel holder and the grinding wheel holder,
can be fixed in the hollow part ,
The hollow portion is continuous with the hole and is formed along the hole axis direction of the hole,
It is characterized by having a first member that can be fixed to the hollow portion, and a second member that can be fed and moved relative to the first member in the axial direction of the spindle and can come into contact with the tip of the spindle. A tool for grinding wheel equipment. A spindle, a grindstone holder having a hollow part in addition to a hole that fits into the spindle, a fixture that fixes the spindle and the grindstone holder in a fitted state, and a fixture attached to the grindstone holder. Regarding a rotary grindstone device including an annular grindstone that rotates around the spindle in a state where the grindstone is fixed, when the grindstone holder and the grindstone are removed from the spindle, the spindle is in a state where the fixation by the fixture is released. A tool for a grinding wheel device for releasing the fitting between the grinding wheel holder and the grinding wheel holder,
can be fixed in the hollow part,
It is characterized by having a first bar member that can be fixed to the hollow portion, a weight that is slidable along the longitudinal direction of the first bar member, and a regulating member that regulates a sliding range of the weight. Tools for grinding wheel equipment.

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