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Polishing jig air injection apparatus and method

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Title: Polishing jig air injection apparatus and method.
Abstract: This invention discloses a polishing jig air injection apparatus including a polishing jig installation base including a surface on which a spectacle lens polishing jig is placed, an injection member which is inserted into an air injection port of the spectacle lens polishing jig, and an air supply device which supplies the air into a balloon member of the spectacle lens polishing jig via the injection member and the air injection port. The injection member includes a main body formed in a pillar shape, and a seal member. The main body includes an air passage, and an annular groove formed in the outer circumferential portion of the main body. The seal member is inserted into the annular groove, is formed in an annular shape, and uses an elastic body. The seal member has an outer diameter larger than the inner diameter of the air injection port. ...


Browse recent Hoya Corporation patents - Tokyo, JP
Inventors: Hideo Toriumi, Makoto Tajima, Kazuhiko Katagiri
USPTO Applicaton #: #20120084967 - Class: 29559 (USPTO) - 04/12/12 - Class 295 
Metal Working > Method Of Mechanical Manufacture >Work Holding

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The Patent Description & Claims data below is from USPTO Patent Application 20120084967, Polishing jig air injection apparatus and method.

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BACKGROUND OF THE INVENTION

The present invention relates to a polishing jig air injection apparatus and method for injecting air into a polishing jig provided with a balloon member which inflates by the air pressure.

As a polishing apparatus for polishing the surface of a spectacle lens, a polishing apparatus which uses a polishing jig provided with a balloon member which inflates by the air pressure is available, as described in, for example, Japanese Patent Laid-Open No. 2004-106117 (literature 1). The polishing jig disclosed in literature 1 includes, for example, a balloon member, a support member which supports the balloon member, and a valve which opens/closes an air passage formed in the support member.

The air passage is formed to extend from an air injection port which opens on one end surface of the support member into the balloon member. The valve has a structure which opens by the pressure of air supplied into the air injection port.

The air is injected into the balloon member while the polishing jig is mounted in an air injection apparatus. The air injection apparatus includes, for example, an installation base on which the polishing jig is mounted, an injection member inserted into the air injection port, and an air supply device used to discharge air from the air discharge port of the injection member into the air injection port.

The injection member is attached to the installation base while projecting from it so as to be inserted into the air injection port by mounting the polishing jig on the installation base. The injection member includes a main body formed in a disk shape, and a seal member used to seal the gap between the main body and the air injection port. The air discharge port opens on the outer circumferential surface of the main body. The seal member is formed using an elastic material to have a cup shape which surrounds the outer circumferential portion of the main body so that it is held on the main body by its self elasticity.

Upon discharging air from the air discharge port of the main body into the air injection port while the seal member is inserted in the air injection port, together with the main body, the outer circumferential portion of the seal member inflates outwards in the radial direction and comes into tight contact with the wall surface of the air injection port. The seal member thus deforms, thereby sealing the gap between the injection member and the air injection port. The air discharged from the air discharge port flows into the air injection port from the central portion of the seal member upon passing through the gap between the main body and the seal member.

That is, a polishing jig air injection method related to the present invention is performed by a step of supplying air into the injection member while it is inserted in the air injection port, and a step of inflating the seal member outwards in the radial direction by the air.

Unfortunately, in the apparatus and method disclosed in literature 1, air needs to be passed through the gap between the seal member and the main body of the injection member, so the shape of the seal member has a given constraint. That is, the seal member must be formed in a shape to cover the main body of the injection member, and therefore inevitably uses a dedicated component with a special shape. This leads to an increase in manufacturing cost of the air injection apparatus used to inject air into the polishing jig.

Also, when, for example, the seal member deteriorates after it has been used for a long period of time, its force for clamping the main body may weaken. When this happens, the seal member easily falls off the main body of the injection member. When, for example, the polishing jig is detached from the air injection apparatus after completion of air injection, the seal member may fall off the main body of the injection member while it is still attached to the air injection port. If the seal member falls off the main body, an operation of loading the polishing jig into the polishing apparatus is interrupted, thus degrading the polishing efficiency.

Note that degradation in seal performance of the seal member must be avoided in solving the above-mentioned trouble.

SUMMARY

OF THE INVENTION

The present invention has been made to overcome the above-mentioned problem, and has as its object to provide a polishing jig air injection apparatus and method which use a seal member that has high seal performance, and does not easily fall off the main body of an injection member, but nonetheless is inexpensive.

According to an aspect of the present invention, there is provided a polishing jig air injection apparatus comprising a polishing jig installation base including an installation surface on which a spectacle lens polishing jig including an air injection port and a balloon member which inflates by a pressure of air supplied from the air injection port is placed, an injection member which is supported on the installation surface of the polishing jig installation base while projecting from the installation surface, and inserted into the air injection port of the spectacle lens polishing jig, and an air supply device which is connected to the injection member and supplies the air into the balloon member via the injection member and the air injection port, the injection member including a main body formed in a pillar shape, the main body including an air passage extending through two ends of the main body, and an annular groove formed in an outer circumferential portion of the main body, and a seal member which is inserted into the annular groove, is formed in an annular shape that extends over an entire circumference along the annular groove, and uses an elastic body, the seal member having an outer diameter larger than an inner diameter of the air injection port.

According to another aspect of the present invention, there is provided a polishing jig air injection method comprising the steps of inserting an injection member into an air injection port of a spectacle lens polishing jig, and discharging air from the injection member into the air injection port to inflate a balloon member connected to the air injection port, the injection member including a main body formed in a pillar shape, the main body including an air passage extending through two ends of the main body, and an annular groove formed in an outer circumferential portion of the main body, and a seal member which is inserted into the annular groove, is formed in an annular shape that extends over an entire circumference along the annular groove, and uses an elastic body, the seal member having an outer diameter larger than an inner diameter of the air injection port.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional view showing the arrangement of a polishing jig and installation base;

FIG. 2 is an enlarged sectional view showing an air injection port in the polishing jig;

FIG. 3 is a sectional view of an injection member attached to the installation base;

FIG. 4 is a sectional view showing the state in which the injection member is inserted in the air injection port;

FIG. 5 is a sectional view showing another embodiment of an injection member;

FIG. 6 is a sectional view showing the state in which the injection member is inserted in an air injection port;

FIG. 7 is a sectional view showing another embodiment of an injection member;

FIG. 8 is a sectional view showing the state in which the injection member is inserted in an air injection port;

FIG. 9 is a sectional view of an injection member attached to an installation base;



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stats Patent Info
Application #
US 20120084967 A1
Publish Date
04/12/2012
Document #
13230257
File Date
09/12/2011
USPTO Class
29559
Other USPTO Classes
451390
International Class
24B41/06
Drawings
11



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