JP2012081581A - Air injection method for polishing jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air supply method for a polishing jig, reducing a manufacturing cost of an air injection device, while keeping high sealability.SOLUTION: The method includes a connection step to insert an injection port member 4 having a sealing member 34 into an air injection port 16, and an air supply step to discharge air from an air outlet 36. The injection port member 4 is provided with a peripheral wall 42, and an annular groove 41 having first and second side walls 43 and 44. The sealing member 34 comprises an O-ring, and is inserted into the annular ring 41. After the connection step, a gap S2 is formed between the sealing member 34 and the peripheral wall 42, a gap S1 is formed between the first side wall 43 and the sealing member 34, and the sealing member 34 comes into contact with the second side wall 44. The air supply step includes a pressing step to bias the sealing member 34 radially outside by an air pressure and press an outer peripheral part of the sealing member 34 to a wall surface 16a of the air injection port 16.

Description

  The present invention relates to an air injection method for a polishing jig for injecting air into a polishing jig having a balloon member that is inflated by air pressure.

  2. Description of the Related Art Conventionally, as a polishing apparatus for polishing a lens surface of a spectacle lens, for example, as described in Patent Document 1, there is an apparatus using a polishing jig provided with a balloon member that is inflated by air pressure. The polishing jig shown in Patent Document 1 includes the balloon member, a support member that supports the balloon member, and a valve that opens and closes an air passage formed in the support member.

The air passage is formed to extend from the air inlet opening at one end surface of the support member into the balloon member. The said valve | bulb is a thing of the structure opened with the pressure of the air supplied to the said air inlet.
The air is injected into the balloon member by attaching a polishing jig to the air injection device. This air injection device includes an installation table on which a polishing jig is placed, an injection port member inserted into the air injection port, an air supply device for discharging air from the air outlet of the injection port member, and the like. I have.

  The inlet member is attached in a state of projecting to the installation base so as to be inserted into the air inlet by placing a polishing jig on the installation base. The inlet member is constituted by a main body formed in a disc shape and a seal member for sealing between the main body and the air inlet. The air outlet opens on the outer peripheral surface of the main body. The seal member is formed in a cup shape surrounding the outer peripheral portion of the main body by an elastic material, and is configured to be held by the main body by its own elasticity.

The outer peripheral portion of the seal member bulges outward in the radial direction and comes into close contact with the wall surface of the air injection port when air is discharged from the air outlet of the main body while being inserted into the air injection port together with the main body. By deforming the seal member in this way, the gap between the inlet member and the air inlet is sealed. The air discharged from the air outlet flows into the air inlet from the center of the seal member through the gap between the main body and the seal member.
. That is, the conventional air injection method for the polishing jig includes a step of supplying air to the inlet member in a state where the inlet member is inserted into the air inlet, and a step of causing the air to expand the seal member radially outward. And was carried out by.

JP 2004-106117 A

  However, the conventional air injection method of the polishing jig shown in Patent Document 1 is a method in which air is passed through the gap between the main body of the inlet member and the seal member, and thus there is a problem that the shape of the seal member is restricted. was there. That is, since the seal member must be formed in a shape that covers the main body of the inlet member, it becomes a special part with a special shape. For this reason, the manufacturing cost of the air injection apparatus used for injecting air into the polishing jig is increased. In order to solve such a problem, it is necessary to avoid the deterioration of the sealing performance of the sealing member.

  The present invention has been made to solve such problems, and an object of the present invention is to provide an air supply method for a polishing jig that can reduce the manufacturing cost of an air injection device while maintaining high sealing performance.

  In order to achieve this object, an air injection method for a polishing jig according to the present invention includes an air injection port including a circular hole formed in a polishing jig for a spectacle lens having a balloon member that is inflated by air pressure. A connecting step of inserting a cylindrical inlet member having a seal member that contacts the air inlet over the entire circumference and having an air outlet formed at the tip; and discharging the air from the air outlet to The inlet member is formed with an annular groove having a peripheral wall parallel to the outer peripheral surface of the inlet member and a pair of side walls extending radially outward from the peripheral wall. The seal member is formed in an annular shape extending in the whole circumferential direction of the annular groove by an elastic body and inserted into the annular groove, and after the connection step is finished, A gap is formed between the first wall and the peripheral wall, and a gap is formed between one side wall of the pair of side walls that is first inserted into the air inlet and the seal member, and the other side wall. The air supply step includes a pressurizing step in which the seal member is urged radially outward by air pressure and the outer peripheral portion of the seal member is pressed against the wall surface of the air inlet. This is an air injection method for a polishing jig.

  According to the present invention, in the above invention, the seal member is formed in a shape that contacts the peripheral wall of the annular groove and a gap is formed between the seal member and the connecting step. A gap is formed between the axial pressing step pressed against the other side wall by friction with the wall surface of the inlet and the peripheral wall by friction between the seal member and the wall surface of the air inlet. An air injection method for a polishing jig including a radially deforming step that elastically deforms.

  According to the present invention, in the above invention, the seal member is formed in a shape that contacts the both side walls of the annular groove and a gap is formed between the peripheral wall and the connecting step. An air injection method for a polishing jig including an axial deformation step that elastically deforms so that a gap is formed between the one side wall by friction with a wall surface of an air injection port.

  The present invention is the above invention, wherein the seal member is formed in a shape in which a gap is formed between the side wall and the peripheral wall of the annular groove, and the connecting step includes the step of connecting the seal member to the air inlet. An air injection method for a polishing jig, which includes an axial pressing step that is pressed toward the other side wall by friction with a wall surface.

According to the present invention, air flows directly from the air outlet of the inlet member into the air inlet. Since the seal member is formed of an annular elastic body extending along the annular groove, an inexpensive ready-made product can be used. Further, according to this air injection method, after the connection step is completed, that is, before the air supply step is started, a pressurizing air passage extending from the air outlet of the inlet member to the inner peripheral portion of the seal member is secured. be able to. For this reason, although the seal member is an off-the-shelf product, air pressure can be reliably applied to the inner peripheral portion of the seal member, and sealing can be performed by urging the seal member with air pressure.
Therefore, according to this invention, the air supply method of the grinding | polishing jig | tool which can reduce the manufacturing cost of an air injection apparatus can be provided, maintaining sealing performance high.

It is sectional drawing which shows the structure of a grinding | polishing jig | tool and an installation stand. It is sectional drawing which expands and shows the air inlet part of a grinding | polishing jig | tool. It is sectional drawing of the inlet member attached to the installation stand. It is sectional drawing which shows the initial state of a connection step. It is sectional drawing which shows the state which the connection step completed. It is a flowchart for demonstrating the method of inject | pouring air into a grinding | polishing jig | tool. It is sectional drawing which shows the initial state of a connection step. It is sectional drawing which shows the state which the connection step completed. It is a flowchart for demonstrating the method of inject | pouring air into a grinding | polishing jig | tool. It is sectional drawing which shows the initial state of a connection step. It is sectional drawing which shows the state which the connection step completed. It is a flowchart for demonstrating the method of inject | pouring air into a grinding | polishing jig | tool. It is sectional drawing which shows the dimension of each part at the time of experiment. It is a figure for demonstrating an experimental result.

(First embodiment)
Hereinafter, an embodiment of an air injection method for a polishing jig according to the present invention will be described in detail with reference to FIGS.
The air injection method according to the present invention is implemented by the air injection device 1 for a polishing jig shown in FIG. An air injection apparatus 1 for a polishing jig shown in FIG. 1 includes an installation base 3 on which a spectacle lens polishing jig 2 is placed, an inlet member 4 protruding from the installation base 3, and the inlet member. 4 and an air supply device 6 connected via an air passage 5.

  The polishing jig 2 is equivalent to the polishing jig described in Patent Document 1, and is loaded into a polishing apparatus (not shown) after air is injected by the air injection apparatus 1. The polishing jig 2 according to this embodiment includes a rubber balloon member 11 that is inflated by air pressure, and a support member 12 for supporting the balloon member 11. The balloon member 11 is inflated when air is supplied from an air supply device 6 to be described later, and a polishing pad (not shown) is mounted in a state where the surface is inflated to have a predetermined curvature. The predetermined curvature is the curvature of the lens surface of the spectacle lens to be polished.

  The support member 12 is formed with an air passage 13 for injecting air into the balloon member 11 and discharging air from the balloon member 11. The air passage 13 includes a circular hole 14 having a circular cross section formed in the support member 12 and a valve 15 provided between the circular hole 14 and the balloon member 11. One end of the circular hole 14 located on the side opposite to the balloon member 11 is opened as an air inlet 16 on the flat mounting surface 12 a of the support member 12. The air inlet 16 is formed to open on the mounting surface 12a so that the opening shape is circular, and to extend in a direction orthogonal to the mounting surface 12a.

  As shown in FIG. 2, the valve 15 includes a check valve 23 including a ball 21 and a conical coil spring 22, and an exhaust mechanism 25 having an exhaust pin 24 facing the ball 21. The check valve 23 has a structure that allows air to pass only into the balloon member 11 from the air inlet 16 side. The exhaust pin 24 is for pressing the ball 21 against the spring force of the conical coil spring 22. The exhaust pin 24 is supported by the valve housing 26 so that the exhaust pin 24 can move back and forth between the retracted position shown in FIG. 2 and the exhaust position where the front end of the exhaust pin 24 presses the ball 21. The exhaust pin 24 is biased in a direction away from the ball 21 by a conical coil spring 27 provided between the exhaust pin 24 and the valve housing 26.

  As shown in FIG. 1, the installation table 3 is formed in a plate shape having a flat installation surface 3a on which the polishing jig 2 is placed. The installation table 3 is supported by a moving device (not shown) and is configured to be movable between a jig attaching / detaching position where a polishing jig is attached / detached and a height measuring position (not shown). Has been. The height measurement position is a position at which a height measuring device (not shown) measures the height of the balloon member 11 inflated with air pressure.

The balloon member 11 swells when air is supplied from an air supply device 6 to be described later in a state where it is placed on the installation table 3. The curvature of the surface of the balloon member 11 changes corresponding to the height of the balloon member 11. For this reason, air is supplied to the balloon member 11 until the height measured by the height measuring device matches the target curvature (the curvature of the lens surface of the spectacle lens to be polished). The
As shown in FIG. 3, the inlet member 4 includes a cylindrical main body 33 having a screw portion 32 screwed into a screw hole 31 of the installation base 3 and protruding from the installation surface 3 a. , And a sealing member 34 made of an elastic body mounted on the outer peripheral portion of the main body 33.
The screw hole 32 is connected to the air supply device 6 through the air passage 5. The air supply device 6 uses an air compressor (not shown) as an air supply source.

  The outer diameter A of the main body 33 having a cylindrical shape is formed smaller than the inner diameter B (see FIG. 2) of the air inlet 16 of the polishing jig 2. A through hole 35 is formed in the axial center portion of the main body 33. One end of the through hole 35 is opened as an air outlet 36 on the projecting side end surface of the main body 33. The other end of the through hole 35 is connected to the air passage 5.

  An annular groove 41 for holding a seal member 34 to be described later is formed on the outer peripheral portion of the main body 33 so as to extend in the circumferential direction. The annular groove 41 according to this embodiment is formed by a peripheral wall 42 parallel to the outer peripheral surface 33 a of the main body 33, and a first side wall 43 and a second side wall 44 that extend radially outward from the peripheral wall 42. Yes. The first side wall 43 and the second side wall 44 are formed to be parallel to the installation surface 3 a of the installation table 3.

The seal member 34 is made of an elastic body and is inserted into the annular groove 41. The shape of the sealing member 34 is an annular shape extending along the annular groove 41 over the entire region in the circumferential direction. The seal member 34 used in this embodiment is an off-the-shelf O-ring.
The inner diameter d1 of the seal member 34 is formed to be equal to the outer diameter D of the peripheral wall 42. Further, the thickness W of the seal member 34 is formed to be smaller than the groove width G (interval between the first side wall 43 and the second side wall 44) G of the annular groove 41. That is, in a state where the seal member 34 is inserted into the annular groove 41, there is a gap between at least one of the first side wall 43 and the second side wall 44 of the annular groove 41 and the seal member 34. S1 is formed. Further, the outer diameter d2 of the seal member 34 is formed larger than the inner diameter B of the air inlet 16.

  The seal member 34 is not limited to an O-ring, and any elastic body can be used as long as it has a shape extending in the entire circumferential direction of the annular groove 41. For example, the seal member 34 may be an elastic body formed in a ring shape, or may be an elastic body having a shape in which the ring is cut at one place in the circumferential direction. If a ring-shaped elastic body cut in one place as described above is used as the sealing member 34, it can be expanded in a C-shape, so that the operation of inserting into the annular groove 41 and the operation of removing from the annular groove 41 are easy. Can be done.

  As a material of the elastic body forming the seal member 34, for example, fluoro rubber (FPM) can be used. Since fluororubber has a self-lubricating property, the resistance decreases when the sealing member 34 is inserted into and removed from the air inlet 16 of the polishing jig 2. For this reason, the polishing jig 2 is easily attached and detached, and the seal member 34 is hardly worn.

Next, an air injection method for a polishing jig using the above-described air injection device will be described.
As shown in FIG. 6, the air injection method of the polishing jig according to this embodiment is performed by a connection step P1, an air supply step P2, and a height adjustment step P3.
In the connection step P1, the polishing jig 2 is placed on the installation base 3 located at the jig attaching / detaching position, and the inlet member 4 is inserted into the air inlet 16 as shown in FIGS. Is done by.

In this connection step P1, when the inlet member 4 is inserted into the air inlet 16, first, as shown in FIG. 4, the seal member 34 is caused to friction with the wall surface 16a of the air inlet 16 due to friction with the second side wall. 44 is pressed toward the axis 44 (axial direction pressing step P4). As shown in FIG. 4, the seal member 34 is brought into contact with the second side wall 44 by the pressing.
The wall surface 16a further advances in the state where the seal member 34 is in contact with the second side wall 44 in this way (moves downward in FIG. 4). As the wall surface 16a further advances in this manner, the outer peripheral portion of the seal member 34 is pushed in the traveling direction of the wall surface 16a due to friction with the wall surface 16a, and the first member of the seal member 34 as shown by the arrow in FIG. The part facing the side wall 43 is displaced radially outward (radial deformation step P5).

  After this connection step P1 is completed, the state shown in FIG. 5 is obtained. That is, in this state, the seal member 34 contacts the second side wall 44. Further, a gap S <b> 1 is formed between the first side wall 43 inserted into the air inlet 16 and the seal member 43 among the pair of side walls 43, 44. Further, a gap S <b> 2 is formed between the inner peripheral portion of the seal member 34 and the peripheral wall 42.

  After the connection step P1 is thus completed, the process proceeds to the air supply step P2. The air supply step P2 is performed in a state in which a pressurizing air passage 51 (see FIG. 5) extending from the air outlet 36 of the inlet member 4 to the inner peripheral portion of the seal member 34 is secured after the connection step P1 is completed. The The pressurizing air passage 51 includes a space formed between the inlet member 4 and the valve 15, a gap S3 (see FIG. 5) between the tip of the inlet member 4 and the air inlet 16; It is constituted by the gap S1 and the gap S2.

  In the air supply step P <b> 2, the installation base 3 is moved to the height measurement position, and the air supply device 6 is operated to discharge air to the air passage 5. The air in the air passage 5 flows into the air inlet 16 through the through hole 35 of the inlet member 4. The air supplied into the air inlet 16 flows into the balloon member 11 through the valve 15 when the pressure in the air inlet 16 rises and the valve 15 opens. The balloon member 11 swells when air is injected as described above.

  On the other hand, the pressure of the air discharged from the air outlet 36 is also transmitted to the inner peripheral portion of the seal member 34 through the pressurizing air passage 51. Thus, by applying air pressure to the inner peripheral part of the seal member 34, the seal member 34 is pressed toward the outside in the radial direction, and the force pushing the wall surface 16a of the air inlet 16 increases (pressurization step P6). ). That is, according to this embodiment, the seal member 34 can be urged by air pressure to seal between the inlet member 4 and the air inlet 16.

The air is injected into the balloon member 11 until the height of the balloon member 11 measured by the height measuring device reaches the target height in the height adjusting step P3. This target height is a height corresponding to the curvature of the spectacle lens to be polished.
The installation table 3 is returned to the jig attachment / detachment position after the injection of air into the balloon member 11 is completed. The polishing jig 2 is removed from the installation table 3 after the installation table 3 has moved to the jig attachment / detachment position, and loaded into the polishing apparatus.

Therefore, according to this embodiment, since the pressurizing air passage 51 is secured before the air supply step P2 is started, the inexpensive seal member 34 is used. The pressure of air can be reliably applied to the inner peripheral portion of the seal member 34, and the seal member 34 can be sealed by urging the seal member 34 with air pressure.
Therefore, according to this embodiment, it is possible to provide an air supply method for the polishing jig 2 that can reduce the manufacturing cost of the air injection device 1 while maintaining high sealing performance.

The connection step P1 according to this embodiment includes the axial pressing step P4 and the radial deformation step P5. In the axial pressing step P4, the seal member 34 is pressed toward the second side wall 44 by friction with the wall surface 16a of the air inlet 16. In the radial deformation step P5, the seal member 34 is elastically deformed so that a gap S2 is formed between the seal member 34 and the peripheral wall 42 due to friction with the wall surface 16a of the air inlet 16.
Therefore, according to this embodiment, the operation of inserting the inlet member 4 into the air inlet 16 causes the seal member 34 to elastically deform outward in the radial direction to force the pressurizing air passage 51. Can be formed. Therefore, according to this embodiment, the seal member 34 can be expanded more reliably outward in the radial direction, so that the reliability of the seal can be increased.

(Second Embodiment)
In order to secure the pressurizing air passage, it can be performed by the method described with reference to FIGS.
7 to 9, the same or equivalent members as those described with reference to FIGS. 1 to 6 are denoted by the same reference numerals, and detailed description thereof is omitted as appropriate.
The outer diameter d2 of the seal member 34 shown in FIG. 7 is formed larger than the inner diameter B of the air inlet 16 in the same manner as the seal member shown in FIGS. However, the thickness W of the seal member 34 is formed so as to coincide with the groove width G (the distance between the first side wall 43 and the second side wall 44) G of the annular groove 41. The inner diameter d1 of the seal member 34 is formed larger than the outer diameter D of the peripheral wall 42 of the annular groove 41.

  That is, the seal member 34 according to this embodiment is formed in a shape that contacts the both side walls 43 and 44 of the annular groove 41 and that the gap S <b> 2 is formed between the circumferential wall 42. When the sealing member 34 according to this embodiment is inserted into the air inlet 16, as indicated by an arrow in FIG. 8, the seal member 34 is moved toward the installation base 3 in the axial direction by friction with the wall surface 16 a of the air inlet 16. Pressed.

  For this reason, the sealing member 34 according to this embodiment is elastically deformed so that a gap S1 is formed between the sealing member 34 and the first side wall 43 in the connection step P1 inserted into the air inlet 16. That is, the connection step P1 according to this embodiment is configured by the axial deformation step P7 (see FIG. 9) in which the seal member 34 is pushed in the axial direction and elastically deformed as described above. Also in this embodiment, when the connection step P1 is completed, as shown in FIG. 8, a pressurizing air passage 51 extending from the air outlet 36 of the inlet member 4 to the inner peripheral portion of the seal member 34 is formed. The

  For this reason, according to the air injection method of the polishing jig 2 according to this embodiment, the seal member 34 is elastically deformed in the axial direction by the operation of inserting the injection port member 4 into the air injection port 16 and the pressurization is performed. The air passage 51 can be forcibly formed. Therefore, according to this embodiment, the seal member 34 can be expanded more reliably outward in the radial direction, so that the reliability of the seal can be increased.

(Third embodiment)
The method shown in FIGS. 10 to 12 can be used to secure the pressurizing air passage.
10 to 12, members identical or equivalent to those described with reference to FIGS. 1 to 6 are given the same reference numerals, and detailed description thereof is omitted as appropriate.
The outer diameter d <b> 2 of the seal member 34 shown in FIG. 10 is formed in a size such that the seal member 34 contacts the wall surface 16 of the air inlet 16. That is, the outer diameter d2 is formed so as to coincide with the inner diameter B of the air inlet 16 or slightly larger than the inner diameter B. Further, the thickness W of the seal member 34 is formed smaller than the groove width G of the annular groove 41 (the distance between the first side wall 43 and the second side wall 44). Further, the inner diameter d 1 of the seal member 34 is formed larger than the outer diameter D of the peripheral wall 42 of the annular groove 41.

That is, in the seal member 34 according to this embodiment, a gap S1 is formed between at least one of the side walls 33, 34 of the annular groove 41, and a gap S2 is formed between the circumferential wall 42 and the seal member 34. It is formed in the shape to be.
When the seal member 34 according to this embodiment is inserted into the air inlet 16, the seal member 34 is installed in the axial direction by friction with the wall surface 16 a of the air inlet 16 as indicated by an arrow in FIG. 11. It is pushed to the table 3 side.

  For this reason, the sealing member 34 according to this embodiment is pushed as described above to contact the second side wall 44 in the connection step P1 inserted into the air inlet 16. That is, the connection step P1 according to this embodiment is constituted by the axial pressing step P4 (see FIG. 12) in which the seal member 34 is pressed in the axial direction as described above. Also in this embodiment, the pressurizing air passage 51 extending from the air outlet 36 of the inlet member 4 to the inner peripheral portion of the seal member 34 is formed by completing the connection step P1.

  According to the air injection method of the polishing jig 2 according to this embodiment, the pressurizing air passage 51 can be formed without causing the seal member 34 to be greatly elastically deformed. Therefore, according to this embodiment, since the air supply step P2 is started in a state where the elastic deformation amount of the seal member 34 is relatively small, the seal member 34 can be sufficiently elastically deformed by air pressure. As a result, the sealing performance can be further improved by adopting the air injection method according to this embodiment.

  The inlet member 4 shown in this embodiment is manufactured with the dimensions shown in FIG. 13 and when air is actually injected into the polishing jig 2, the air is not leaked and the seal member 34 is not dropped. Could be used. The outer diameter A of the main body 33 of the inlet member 4 used in this experiment is 12.6 mm, the outer diameter D of the peripheral wall 42 of the annular groove 41 is 7.2 mm, and the groove width G is 3.7 mm. The seal member 34 has an inner diameter d1 of 7.5 mm and a thickness W of 3.55 mm. For this reason, the outer diameter of the sealing member 34 is 14.6 mm. The seal member 34 used was an O-ring called type AS568-203. The material of this O-ring is fluororubber (FPM).

  In this experiment, a plurality of polishing jigs 2 that were actually polished were used, and attachment / detachment and air injection were performed 100 times for each polishing jig 2. During the experiment, the presence or absence of the seal member 34 was confirmed when the polishing jig 2 was attached or detached, and the presence or absence of air leakage was confirmed during air injection. As a result of the experiment, when the number of times that the polishing jig 2 can be attached / detached without detaching the seal member 34 is 95 times or more, the attachment / detachment is passed, and the number of times that air can be injected without leaking air is 95 times or more. Was acceptable for air injection.

  As a result of this experiment, as shown in FIG. 14, in all the polishing jigs 2, the attachment / detachment of the polishing jig and the air injection were acceptable. In FIG. 14, the pass for each polishing jig 2 is indicated by ○. The A size and B size of each polishing jig 2 shown in FIG. 14 are values obtained by measuring the inner diameter B of the air inlet 16 from two directions orthogonal to each other. The inner diameter B of the air inlet 16 of the polishing jig 2 used in this experiment is 14.0 to 14.32 mm, as can be seen from FIG. The size of the air inlet 16 differs for each polishing jig 2 because of the tolerance.

  When the inventor repeatedly used the inlet member 4 used in the above-described experiment and the conventional inlet member for comparison and repeated injection of air, the effect of the present invention was verified as follows. did it. In the following, the inlet member 4 used in the experiment is referred to as “the product of the present invention”, and the conventional inlet member is referred to as the “conventional product”. In the verification of this effect, it is avoided to repeatedly use only a specific polishing jig assuming the state of the actual polishing process, and all the plurality of polishing jigs 2 used in the actual polishing process are verified. Used to be the target.

(1) Frequency of injection work mistakes:
In the conventional product, the seal member may come off, and out of 100 injection operations, an injection operation error occurred 5 times. That is, the frequency of mistakes in the conventional product is 5%.
The product of the present invention had one injection operation error out of 100 injection operations. In other words, the frequency of injection work mistakes for the product of the present invention is 1%.
(2) Workability of attachment / detachment work:
The conventional product is a so-called cover type seal member, so that it is easy to come off and the workability of the attaching / detaching work is low.
The product of the present invention does not come off because the seal member is of a so-called fitting type, and has high workability for attaching and detaching operations.
(3) Exchange frequency:
The replacement frequency of the conventional product is about twice per month (30 days) when the injection operation is performed 100 times a day. In other words, the conventional product needs to be replaced twice while the injection operation is performed 3000 times.
The replacement frequency of the product of the present invention is about once every two months (60 days) when the injection operation is performed 100 times a day. That is, the product of the present invention can inject air 6000 times with one exchange.
(4) Durability:
The durability of the conventional product and the durability of the product of the present invention were equivalent.
(5) Cost (unit price):
The conventional product is 3590 yen per piece, and the product of the present invention is 200 yen per piece.
(6) Monthly running cost (estimated):
The running cost of the conventional product is 7180 yen per month if the replacement frequency of the conventional product is twice per month.
The running cost of the product of the present invention is 100 yen per month when the replacement frequency of the product of the present invention is 0.5.
(7) Other:
Since the conventional product is a so-called processed product, the time required for manufacturing is relatively long.
Since the product of the present invention can be manufactured using a general-purpose O-ring, the time required for manufacturing is remarkably shortened compared to the conventional product.

  In each of the above-described embodiments, an example in which an O-ring having a circular cross section is used as the seal member 34 has been described. However, the cross-sectional shape of the seal member 34 can be changed as appropriate, such as an oval or an oval.

  DESCRIPTION OF SYMBOLS 1 ... Polishing jig | tool air injection apparatus, 2 ... Polishing jig | tool, 3 ... Installation stand, 3a ... Installation surface, 4 ... Injection port member, 6 ... Air supply apparatus, 12a ... Mounting surface, 16 ... Air injection port, 16a DESCRIPTION OF SYMBOLS ... Wall surface, 33 ... Main body, 34 ... Seal member, 36 ... Air outlet, 41 ... Annular groove, 42 ... Peripheral wall, 43 ... First side wall, 44 ... Second side wall, 51 ... Pressurizing air passage, S1, S2 ... the gap.

Claims (4)

An air inlet having a circular cross section formed in a spectacle lens polishing jig having a balloon member that is inflated by air pressure has a sealing member that contacts the entire circumference of the air inlet, and an air outlet at the tip. A connection step of inserting the formed cylindrical inlet member;
An air supply step of inflating the balloon member by discharging air from the air outlet,
The inlet member is formed with an annular groove having a peripheral wall parallel to the outer peripheral surface of the inlet member and a pair of side walls extending radially outward from the peripheral wall.
The seal member is formed into an annular shape extending across the entire circumferential direction of the annular groove by an elastic body, and is inserted into the annular groove,
After the connection step is completed, a gap is formed between the inner peripheral portion of the seal member and the peripheral wall, and one of the pair of side walls inserted into the air inlet first and the side wall A gap is formed between the seal member and the seal member comes into contact with the other side wall,
The air of the polishing jig is characterized in that the air supply step includes a pressurizing step in which the seal member is urged radially outward by air pressure, and the outer peripheral portion of the seal member is pressed against the wall surface of the air inlet. Injection method. The air injection method for a polishing jig according to claim 1, wherein the sealing member is formed in a shape that is in contact with the peripheral wall of the annular groove and a gap is formed between the side wall and the side wall.
The connecting step includes an axial pressing step in which the seal member is pressed toward the other side wall by friction with a wall surface of the air inlet,
An air injection method for a polishing jig, comprising: a radial deformation step in which the seal member is elastically deformed so that a gap is formed between the seal member and the peripheral wall by friction with a wall surface of the air injection port. The air injection method for a polishing jig according to claim 1, wherein the seal member is formed in a shape that is in contact with the both side walls of the annular groove and a gap is formed between the peripheral wall,
The connecting step includes an axial deformation step in which the seal member elastically deforms so that a gap is formed between the seal member and the one side wall due to friction with a wall surface of the air inlet. Jig air injection method. The air injection method for a polishing jig according to claim 1, wherein the seal member is formed in a shape in which a gap is formed between the side wall and the peripheral wall of the annular groove,
The air injection method for a polishing jig, wherein the connecting step includes an axial pressing step in which the seal member is pressed toward the other side wall by friction with a wall surface of the air injection port.

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