JP5025374B2 - Holder, polishing method - Google Patents

Description

  The present invention relates to a technique for holding an object to be polished and a polishing technique. For example, the present invention relates to a technique for holding an optical element such as a spherical or planar lens used in a camera or a microscope when grinding and polishing the optical element. .

  For example, as a lens holder that implements a spherical or planar lens used for a camera, a microscope, or the like by a single ball processing, a technique disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 11-10503) is known. .

  That is, in the conventional lens holder disclosed in Patent Document 1, in a configuration in which the lens is supported by the lens receiving sheet in the outer cylinder portion, at least one is attached to the outer cylinder portion in order to facilitate attachment / detachment of the lens from the holder. A configuration in which more than one notch is provided is disclosed. Moreover, it is set as the structure which attaches an outer cylinder part to a lens holder main body so that replacement | exchange is possible.

  However, in the conventional lens holder disclosed in Patent Document 1, a cutout is provided in the outer cylinder portion in order to facilitate attachment / detachment of the lens. There is a concern that stress concentration occurs on the lens.

  In other words, when grinding or polishing is performed, the lens holder is mounted with the lens for processing, but the outer cylinder part serves to support the edge part that is the outer periphery of the lens so that the lens being processed does not come off the holder. Therefore, if there is a notch in the outer cylinder part, stress concentration due to the processing force occurs in the notch part in the edge part, and the edge part is damaged (debris).

  In particular, the lens holder disclosed in Patent Document 1 assumes a case where the edge portion is thin and it is more difficult to remove the lens than the holder, and in that case, there is a notch in the outer cylinder that supports the edge portion. The thin edge portion is more easily damaged by the stress concentration.

  Also, if stress concentration occurs in the edge due to the cutout of the outer cylinder, lens deformation at the edge is likely to occur. Especially when the edge is used with a thin lens, the thin edge easily deforms due to stress concentration. There is a concern that the shape accuracy is reduced, and the shape accuracy is also deteriorated in the spherical surface or the flat surface portion subjected to grinding or polishing.

  Further, when the lens is supported by the lens receiving sheet in the outer cylinder portion, as described in Patent Document 1, the two cannot be easily taken out and the lens cannot be easily taken out. This adhesion force between the lens and the lens receiving sheet is generated when the force is applied in the direction in which the lens is peeled off from the lens receiving sheet. It is weak against the direction in which the lens rotates during processing.

  That is, when the lens is peeled off from the lens receiving sheet, it is difficult to peel off, but the holding force is weak against the force accompanying the rotation during the polishing process, and the lens may slip and slip in the holder. Many. For this reason, the relative movement of each other occurs on the holding surface of the lens in contact with the lens receiving sheet, and this is likely to cause defects such as scratches and irregularities (defects that occur like dents on the lens surface). There are specific issues.

In particular, when the outer diameter of the lens is reduced, polishing is performed in the vicinity of the rotation axis of the lens, so that the torque that gives the subordinate rotation of the lens and the holder due to friction with the polishing dish becomes very small, and the lens with the desired rotational force. It becomes difficult to turn.
Japanese Patent Laid-Open No. 11-10503

  It is an object of the present invention to be able to easily attach and detach an object to be polished while preventing damage to the edge part and a decrease in accuracy by grinding and polishing even if the object to be polished is a thin lens or the like. An object of the present invention is to provide a holding technique capable of easily rotating even a small-diameter workpiece while preventing defects on the back surface of the article.

A first aspect of the present invention is a holder for holding an object to be slidably contacted with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
Sheet materials having different friction coefficients of the first and second main surfaces that are front and back in the thickness direction;
A receiving material that is located inside the outer cylinder and supports the object to be polished via the sheet material,
An elastic body that urges the receiving member in a direction to be pulled into the outer cylinder;
A holding tool is provided.

A second aspect of the present invention is a holder for holding an object to be slidably contacted with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
A receiving sheet material in contact with the holding surface opposite to the processing surface of the object to be polished;
A sliding sheet material in contact with the receiving sheet material and having a smaller coefficient of friction than the receiving sheet material;
A support material that is located inside the outer cylinder and is fixed to the sliding sheet material to support the object to be polished,
An elastic body that urges the support member in a direction in which the support member is pulled into the outer cylinder;
A holding tool is provided.

A third aspect of the present invention is a holder for holding an object to be slidably contacted with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
A receiving sheet material in contact with the holding surface opposite to the processing surface of the object to be polished;
A receiving material that is located inside the outer cylinder and is fixed to the receiving sheet material and supports the object to be polished;
A sliding sheet material in contact with the receiving material and having a smaller coefficient of friction than the receiving sheet material;
A support material that is located inside the outer cylinder, is fixed to the sliding sheet material, and supports the object to be polished through the receiving material;
An elastic body that urges the receiving member in a direction to be pulled into the outer cylinder;
A holding tool is provided.

A fourth aspect of the present invention is a holder for holding an object to be slidably contacted with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
Sheet materials having different friction coefficients of the first and second main surfaces that are front and back in the thickness direction;
A receiving material that is located inside the outer cylinder and supports the object to be polished via the sheet material,
An elastic body that urges the receiving material in a direction to be pulled into the outer cylinder;
A regulating ring that supports the relative position of the outer cylinder and the receiving member so as to be movable and adjustable in the thickness direction of the object to be polished;
A holding tool is provided.

A fifth aspect of the present invention is a holding tool for holding an object to be slidably contacted with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
A receiving sheet material in contact with the holding surface opposite to the processing surface of the object to be polished;
A sliding sheet material in contact with the receiving sheet material and having a smaller coefficient of friction than the receiving sheet material;
A receiving material that is located inside the outer cylinder and is fixed to the sliding sheet material to support the object to be polished;
An elastic body that urges the receiving member in a direction to be pulled into the outer cylinder;
A regulating ring that supports the relative position of the outer cylinder and the receiving member so as to be movable and adjustable in the thickness direction of the object to be polished;
A holding tool is provided.

A sixth aspect of the present invention is a holder for holding an object to be slidably contacted with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
A receiving sheet material in contact with the holding surface opposite to the processing surface of the object to be polished;
A receiving material that is located inside the outer cylinder and is fixed to the receiving sheet material and supports the object to be polished;
A sliding sheet material in contact with the receiving material and having a smaller coefficient of friction than the receiving sheet material;
A support material that is located inside the outer cylinder, is fixed to the sliding sheet material, and supports the object to be polished through the receiving material;
An elastic body that urges the support member in a direction in which the support member is pulled into the outer cylinder;
A regulating ring that supports the relative position of the outer cylinder and the receiving material through the support material so as to be movable and adjustable in the thickness direction of the object to be polished;
A holding tool is provided.

A seventh aspect of the present invention is a polishing method for supporting a holding surface opposite to a processing surface in sliding contact with a polishing tool of an object to be polished on a receiving material via a sheet material,
A polishing method is provided in which the friction coefficient of the second main surface of the sheet material in contact with the receiving material is smaller than the friction coefficient of the first main surface of the sheet material in contact with the holding surface.

  According to the present invention, the object to be polished can be easily attached and detached while preventing damage to the edge part and deterioration of accuracy in grinding and polishing processes even if the object has a thin edge such as a lens. It is possible to provide a holding technique that can easily rotate even a small-diameter workpiece while preventing defects on the back surface of the article.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the configuration (means) and operation of each aspect of the present invention will be generally described, and then further detailed with reference to the drawings.
[Means and Actions for the First and Second Aspects of the Present Invention]
(means)
In the first aspect, in the optical element holder used when the optical element of a lens or flat glass and the tool are rubbed with each other, and the optical element is ground and polished by relative movement by rotation and swinging of each other, the optical element An outer cylinder that holds the outer diameter part of the sheet, a sheet material having different friction coefficients on the front and back in the thickness direction, a receiving material that supports the optical element via the sheet material, and the outer cylinder and the receiving material by the elastic force There is provided an optical element holder comprising an elastic body that is pressed against each other.

In the second aspect, in addition to the first aspect, the friction coefficient of the surface in contact with the receiving material is smaller than the friction coefficient of the sheet material in contact with the holding surface opposite to the processing surface of the optical element. An optical element holder is provided.
(Function)
The receiving member and the outer cylinder constituting the lens holder are engaged so as to attract each other by the restoring force of the elastic material that is compressed and stretched. A lens to be processed in this state is inserted into the outer cylinder and mounted on a grinding machine or a polishing machine for processing. At this time, the lens is in contact with the sheet material and the spherical surface on the opposite side of the lens is in contact with the receiving material for supporting and holding the lens in the thickness direction via the sheet material, and the edge portion corresponding to the outer diameter portion of the lens. Then, processing is performed in a state where the lens is held by an outer cylinder that supports the lens in the radial direction of the lens. When processing is completed, it is necessary to take out the lens from the lens holder, but here the lens is inserted inside the outer cylinder, especially when the edge of the lens is thin, it is buried inside the outer cylinder, It cannot be taken out easily. For this reason, in the holder of this invention, a lens can be drawn | fed out from an outer cylinder and can be taken out easily by pushing out the receiving material holding the lens spherical surface with respect to an outer cylinder. At this time, the receiving material and the outer cylinder are compressed so that they are attracted to each other by the restoring force of the elastic material that is going to stretch, so the receiving material is pushed out from the outer cylinder with a force that exceeds this attracting force. Thus, the lens can be sent out from the inside of the outer cylinder. After taking out the lens that has been sent out, by stopping the pushing out of the receiving material (releasing the pushing force), the two members will be attracted to each other by the restoring force of the elastic material that has been compressed further than usual, and return to the original state. Can do.

  Further, the sheet material interposed between the lens and the receiving material that supports the lens has a structure in which the coefficient of friction is different between the front and back in the thickness direction. If the surface is in contact with the lens, and if it is a surface, the surface needs to be held so as not to slip relative to the lens when the lens is polished, so that the material has a large friction coefficient. On the other hand, if it is the opposite side of the lens, and if it is the back side, the back side is in contact with the receiving material to support the lens, but here the receiving material and the back side are not fixed but are in contact with each other. In a conventional holder, the lens receiving sheet and the receiving material are generally fixed, but in this embodiment, both are fixed and can move freely. Since the back surface and the receiving material are not fixed, and the lens and the front surface are not fixed, both of them slide on either surface during polishing. Here, since the friction coefficient of the back surface of the sheet material with respect to the receiving material is smaller than the friction coefficient of the surface of the sheet material, the lens and the sheet material can be held without slipping. This prevents relative movement between the lens and the sheet material and prevents the lens from rubbing against the sheet material, thereby preventing wear of the sheet material and generation of scratches on the lens.

  In addition, the lens slides between the lens and the sheet material, and conversely, by adopting a structure that actively slides between the sheet material and the receiving material, for example, even a small-diameter lens slides the lens by polishing. It is also possible to easily rotate the lens without causing scratches.

  In addition, even for a thin lens as described above, since the sheet slides positively between the sheet material and the receiving material, the lens may be scratched against the rotational force generated by the polishing process. Can be easily rotated, and high polishing accuracy can be obtained by obtaining a stable rotation.

In addition, because of the sliding friction due to the surface contact depending on the friction coefficient of the sheet material, unlike the rolling friction due to the point contact such as ball bearings, the fluctuation of the force due to the pressure and processing force in the polishing process However, high rigidity can be exhibited. For this reason, the vibration accompanying rotational movement is also suppressed and higher polishing accuracy can be obtained.
[Means and Actions for the Third Aspect of the Present Invention]
(means)
A lens or flat glass optical element and a tool are rubbed against each other, and the outer diameter portion of the optical element is pressed in a holder for the optical element used when grinding and polishing the optical element by relative movement caused by rotation and swinging of each other. An outer cylinder, a receiving sheet material that is in contact with the holding surface opposite to the processing surface of the optical element, a sliding sheet material that is in contact with the receiving sheet material and has a smaller coefficient of friction than the receiving sheet material, and is optically bonded to the sliding sheet material. Provided is a holder for an optical element, comprising: a receiving material that supports the element; and an elastic body that presses the outer cylinder and the receiving material together by elastic force thereof.
(Function)
The content of the third aspect is that the sheet material in the first aspect is composed of two different types of sheet materials, whereas the sheet material is a sheet material having a different friction coefficient on the front and back sides. is there. It is important for the receiving sheet material that supports and holds the lens to hold the lens without slipping during the polishing process, whereas the sliding sheet material actively slides the receiving material and the receiving sheet material on the contrary. Since it is necessary and completely contradictory characteristics are required, a higher effect can be obtained by using two different materials as described in this embodiment. Details will be described in the embodiment.
[Means and Actions for the Fourth Aspect of the Present Invention]
(means)
According to a fourth aspect of the present invention, there is provided an optical element holder for use in grinding and polishing an optical element by a relative movement caused by rotation and oscillation of each other by rubbing a lens or a flat glass optical element and a tool. An outer cylinder that holds the outer diameter of the optical element, a receiving sheet material that contacts the holding surface opposite to the processing surface of the optical element, a receiving material that fixes the receiving sheet material to support the optical element, and a receiving sheet that contacts the receiving material A sliding sheet material having a small friction coefficient, a supporting material that supports the optical element through the receiving material by fixing the sliding sheet material, and an elastic body that interposes the outer cylinder and the receiving material by pressing each other with its elastic force. An optical element holder is provided.
(Function)
It is the point which has arrange | positioned the member which supports each of a receiving sheet material and a sliding sheet material with respect to the structure of the holder to a 3rd aspect. A receiving material is placed on the receiving sheet material in contact with the lens, and a supporting material is placed on the sliding sheet material, and each sheet material exhibits the functions required by supporting each sheet with a rigid member. It is easy. Since the receiving sheet material is in close contact with the lens and needs to be held firmly without slipping even during polishing, the lens is secured with high rigidity supported by a receiving material having a shape that is roughly inverted from the lens shape. Can support. In addition, since the sliding sheet material needs to slide and rotate the lens positively, it can be supported by a rigid support material as in the previous embodiments, and should act in contact with the receiving material, not the receiving sheet material. Therefore, the lens can slide more actively. Since the receiving sheet material is a member that keeps the lens from sliding, it is easier to slide with the sliding sheet material through the rigid receiving material than to slide the lens with the sliding sheet material in contact with it. The lens can be rotated.

Moreover, since the back surface shape of the receiving material can be set without depending on the lens shape, the contact surface between the receiving material and the sliding sheet material can be configured in a simple shape such as a flat surface, and a more slippery surface can be formed. .
[Means and Actions for Fifth and Sixth Aspects of the Present Invention]
(means)
According to a fifth aspect, in the optical element holder used when the optical element is ground and polished by relative movement by rotating and swinging each other, the optical element of the lens or flat glass and the tool are rubbed together. An outer cylinder that holds the outer diameter part of the sheet, a sheet material having different friction coefficients on the front and back in the thickness direction, a receiving material that supports the optical element via the sheet material, and the outer cylinder and the receiving material by the elastic force An optical element holding device comprising: an elastic body that is pressed against each other; and a regulating ring that supports the relative position of the outer cylinder and the receiving member so as to be movable and adjustable in the thickness direction of the optical element. Provide ingredients.

In the sixth aspect, in addition to the fifth aspect, the friction coefficient of the surface in contact with the receiving material is smaller than the friction coefficient of the sheet material in contact with the holding surface opposite to the processing surface of the optical element. An optical element holder is provided.
(Function)
The point which provided the control ring which adjusts the relative position of a lens receiving material and an outer cylinder differs with respect to the holder of a 1st aspect and a 2nd aspect. Here, the restriction ring is a ring that can adjust the position at which the outer cylinder that inserts the lens and supports the edge portion is fixed with respect to the receiving member that holds the lens. Specifically, the outer cylinder is attracted and pressed to the receiving member by the elastic force of the elastic member. The regulating ring is interposed between the two, and is screwed to the receiving member or the outer cylinder so that the fixing position can be adjusted. By adjusting the fixing position of the restriction ring, the position where the receiving member and the outer cylinder are fixed to each other changes in the thickness direction of the lens, and fine adjustment can be performed according to the size of the edge portion of the lens to be held. .

The holder of the present invention is optimal for holding the lens where the lens edge is thin and easily embedded in the outer cylinder. Therefore, by changing the mounting position of the regulating ring according to the dimensions of the thin edge, The outer cylinder position can be changed in the lens thickness direction with respect to the material, that is, the lens.
[Means and Actions for Seventh and Eleventh Aspects of the Present Invention]
(means)
In the seventh aspect, in the optical element holder used when grinding and polishing the optical element by relative movement by rotating and swinging each other, the optical element of the lens or flat glass and the tool are rubbed together. An outer cylinder that holds the outer diameter portion of the optical element, a receiving sheet material that contacts the holding surface opposite to the processing surface of the optical element, a sliding sheet material that contacts the receiving sheet material and has a smaller coefficient of friction than the receiving sheet material, and a sliding sheet A receiving member that supports the optical element by adhering to the material, an elastic body that presses the outer cylinder and the supporting member against each other by its elastic force, and a relative position of the outer cylinder and the receiving material is determined by the thickness of the optical element. There is provided a holder for an optical element, comprising a regulating ring that is supported so as to be movable in the vertical direction.

In an eleventh aspect, in addition to the seventh aspect, an optical element characterized in that an outer cylinder pressed by an elastic body, a receiving member, and a regulating ring are supported so as to be movable in the thickness direction of the optical element. Provide holders.
(Function)
Similar to the fifth aspect, the third embodiment is different from the third aspect in that a holding ring for adjusting the relative positions of the lens receiving member and the outer cylinder is provided. Here, the restriction ring is the same as the restriction ring described in the fifth aspect, and is the point that the function of the restriction ring described in the fifth aspect is added to the function of the third aspect.
[Means and Actions for the Eighth Aspect of the Present Invention]
(means)
An eighth aspect is the optical element holder used when the optical element of the lens or flat glass and the tool are rubbed with each other, and the optical element is ground and polished by relative movement by rotation and swinging of each other. An outer cylinder that holds the outer diameter of the optical element, a receiving sheet material that contacts the holding surface opposite to the processing surface of the optical element, a receiving material that fixes the receiving sheet material to support the optical element, and a receiving sheet that contacts the receiving material A sliding sheet material having a small friction coefficient, a supporting material that supports the optical element through the receiving material by fixing the sliding sheet material, and an elastic body that interposes the outer cylinder and the receiving material by pressing each other with its elastic force. And a regulating ring for supporting the relative position of the outer cylinder and the receiving member via the support member so as to be movable and adjustable in the thickness direction of the optical element. .
(Function)
Similar to the seventh embodiment, the fourth embodiment is different from the holder of the fourth embodiment in that a restriction ring for adjusting the relative positions of the lens receiving member and the outer cylinder is provided. Here, the restriction ring is the same as the restriction ring described in the fifth aspect and the seventh aspect, and the function of the restriction ring described in the fifth aspect and the seventh aspect is changed to the function of the fourth aspect. This is an added point.
[Means and Actions for the Ninth Aspect of the Present Invention]
(means)
A ninth aspect provides a holder for an optical element according to any one of the first to eighth aspects, wherein the elastic force that presses the outer cylinder and the receiving member is generated by a compressed spring or rubber. To do.
(Function)
The receiving material and the outer cylinder are attracted and engaged with each other by the restoring force of the elastic material compressed in advance to return to the original length. As a member for obtaining this restoring force, a member having a superelastic action such as a spring or rubber is used. A spring is an effective means because its restoring force can be easily set by a spring constant or the like. In addition, if the elastic characteristics of a material can be set for rubber, there is an advantage that a stable force can be exhibited even in an environment where water or an abrasive is supplied by grinding or polishing, and the structure of the holder can be simplified.
[Means and Actions for Tenth Aspect of the Present Invention]
(means)
A tenth aspect provides an optical element holder according to any one of the first to eighth aspects, wherein the elastic force that presses the outer cylinder and the receiving member is generated by an extended spring or rubber. To do.
(Function)
The receiving material and the outer cylinder are attracted and engaged with each other by a restoring force in which the elastic material previously stretched returns to the original length. In the third aspect described above, the restoring force in a state where the elastic material is compressed is used, but in the fourth aspect, an extension force is used. As a member for obtaining a restoring force, a member having a superelastic action, such as a spring or rubber, is used as in the third embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic cross-sectional view showing an example of the configuration of a polishing apparatus provided with a holder for performing a polishing method according to an embodiment of the present invention, and FIGS. 2A and 2B show an example of the operation thereof. FIG.

FIG. 1 shows a state in which the convex lens is polished using the holder of the present embodiment, and FIGS. 2A and 2B specifically show the structure and use method of the holder of the present embodiment.
In the present embodiment, as an example, a polishing apparatus M that performs a polishing process on a lens 2 (object to be polished) such as a convex lens using a holder 1 will be described.

In this case, when one of the two optical surfaces of the lens 2 becomes the workpiece surface 2 a to be polished, the opposite optical surface becomes the holding surface 2 b held by the holder 1.
As illustrated in FIG. 1, the polishing apparatus M of the present embodiment includes a holder 1 that supports the lens 2 and a polishing dish 3 as a polishing tool.

  In order to polish the lens 2 via the holder 1, the holder 1 is tiltably and rotatably engaged with the hairpin 12 that is a part of the polishing apparatus M via the universal joint portion 12 a. The lens 2 held inside is pressed against a polishing dish 3 having a spherical polishing action surface 3a obtained by roughly reversing the spherical shape of the processing surface 2a of the lens 2.

  Then, the polishing plate 3 rotated and driven by the drive shaft 3b and the holding tool 1 supported by the handle 12 through the universal joint 12a so as to be tiltable can rotate and swing each other. The workpiece surface 2a is polished.

  Here, the holder 1 that holds the lens 2 according to the present embodiment during processing will be described. The holder 1 of the present embodiment includes a receiving material 8 that supports the lens 2 via a sheet material 6 that is in contact with the spherical surface (holding surface 2 b) of the lens 2, and an outer diameter portion of the lens 2 that is inserted into the lens 2. The outer cylinder 7 that supports a certain edge portion 2c is engaged via a screw 10 that sandwiches a spring 9 (elastic body) that can be expanded and contracted to engage the receiving member 8 and the outer cylinder 7.

That is, a pin hole 7a is opened on the back side of the outer cylinder 7, and the pin 12 is connected to the back side of the receiving member 8 exposed from the pin hole 7a via the universal joint 12a.
Around the pin hole 7a, a plurality of screw through holes 7b through which the screws 10 are inserted are opened, and the tips of the screws 10 are screwed to the back surface of the receiving member 8 through the screw through holes 7b.

  The spring 9 is disposed between the large-diameter screw head 10a of the screw 10 and the back surface of the outer cylinder 7 in a state of being compressed and deformed, and is received by the elastic force (restoring force) in the extending direction of the spring 9. The material 8 is urged in a direction in close contact with the back side of the outer cylinder 7.

A tapered portion 7c is provided at the end of the outer cylinder 7 on the side holding the lens 2 so as not to interfere with the polishing surface 3a of the polishing dish 3.
Here, the receiving material 8 that supports the lens 2 is made of a metal such as brass or stainless steel that has a sheet material 6 interposed between the lens 2 and is not deformed by the pressure of polishing. The sheet material 6 interposed on the surface is made of a resin such as polyurethane in order to secure a high frictional force with the lens 2 without causing contact scratches or the like on the lens 2.

  In the case of the present embodiment, the sheet material 6 has different structures depending on the front material 4 (first main surface) in contact with the holding surface 2 b of the lens 2 and the backing material 5 (second main surface) in contact with the receiving material 8. ing. Specifically, the sheet material 6 is a polyurethane gradient material whose foaming rate is changed in the thickness direction, and a surface material 4 that contacts the holding surface 2 b of the lens 2, and a backing material 5 that contacts the receiving material 8. The foaming rate is different.

  The sheet material 6 adjusts the foaming rate of polyurethane on the front and back sides, and changes the frictional force against the contacting material. The front surface 4 is softened by increasing the foaming rate to increase flexibility, and the shape adaptability and the holding (friction) force by the adhesion force are improved so as to be easily adapted to the spherical shape of the holding surface 2b of the lens 2. Yes. On the contrary, the backing material 5 on the back surface is hardened by suppressing foaming to increase rigidity, and it is easy to slide against the receiving material 8 by reducing the adhesion.

  That is, in the case of the sheet material 6 of the present embodiment, the friction coefficient μ2 between the backing material 5 and the receiving material 8 is smaller than the friction coefficient μ1 between the front material 4 and the holding surface 2b of the lens 2. Is set to

  Next, the operation of this embodiment will be described with reference to FIGS. 2A and 2B. FIG. 2A is a cross-sectional view of a state in which a lens 2 as a workpiece is attached to the holder 1 of the present embodiment. FIG. 2B is a cross-sectional view showing the lens 2 that has been processed is removed from the holder 1 in the present embodiment.

  The receiving member 8 and the outer cylinder 7 constituting the holder 1 are engaged with each other so as to attract each other by the restoring force of the spring 9 that tries to extend from the compressed state. A lens to be processed in this state is inserted into the outer cylinder 7 and mounted on the universal joint portion 12a of the hairpin 12 included in the polishing apparatus M (or a grinding machine or the like) for pressurization.

  At this time, the lens 2 is in contact with the sheet material 6 on the opposite side of the spherical surface (processed surface 2 a) processed in sliding contact with the polishing dish 3, and the lens is interposed via the sheet material 6. Is carried out in a state in which the receiving member 8 that supports and holds the lens 2 in the thickness direction and the edge portion 2c corresponding to the outer diameter portion of the lens 2 are held by the outer cylinder 7 that supports the lens 2 in the radial direction of the lens 2. Is called.

  At this time, the lens 2 using the holder 1 according to the present embodiment has a thin edge portion 2c as shown in FIGS. 2A and 2B, so that the edge portion 2c is prevented from being damaged. A relatively soft material is used for the outer cylinder 7. Specifically, brass or aluminum is used in the case of a metal, and a resin such as polyacetal or polyimide is often used.

  When the processing is completed, it is necessary to take out the lens 2 from the holder 1. Here, the lens 2 is inserted into the outer cylinder 7, and when the edge portion 2 c is thin, it is buried inside the outer cylinder 7. Therefore, it cannot be taken out easily. In particular, at the spherical surface portion (holding surface 2b) in contact with the surface material 4, the processing liquid and water during the polishing process enter and are strongly adhered and held by the surface tension between the surface material 4 and the polishing liquid, and can be easily removed. There are many cases that cannot be done.

  If the hook portion 2c is forcibly hooked and taken out, the thin edge portion 2c is often damaged, resulting in poor workability. Further, in the lens 2 having the thin edge portion 2c, the contact length with the outer cylinder 7 in the thickness direction of the lens 2 is shortened. Therefore, the lens 2 is easily detached from the outer cylinder 7 during the polishing process. Since the gap is set small, it cannot be easily taken out after the processing is completed.

  On the other hand, in the holder 1 according to the present embodiment, the receiving member 8 holding the holding surface 2b of the lens 2 is pushed from the state of FIG. Like 2B, the lens 2 (edge portion 2c) is drawn out from the outer cylinder 7 and can be easily taken out.

  At this time, the receiving material 8 and the outer cylinder 7 are exerted so as to attract each other by the restoring force of the spring 9 which is compressed and stretched. By pushing out from the outer cylinder 7, the lens 2 can be discharged from the inside of the outer cylinder 7. After the ejected lens 2 is taken out, by stopping the pushing out of the receiving material 8 (releasing the pushing out force), the two are attracted to each other again by the restoring force of the spring 9 that has been further compressed. It can be restored to its original state.

  Here, when the lens 2 is discharged from the outer cylinder 7, both the lens 2 and the sheet material 6 are discharged as shown in FIG. 2B. This is because the sheet material 6 is not fixed to the holder 1 unlike the conventional holder.

  During the polishing process, the sheet material 6 is sandwiched between the lens 2 and the receiving material 8. However, since neither the surface 4 of the sheet material 6 nor the backing material 5 is fixed, the lens 2 is taken out. In some cases, the sheet material 6 is taken out together.

  For this reason, the sheet material 6 has a low frictional force during the polishing of the lens 2 (the friction coefficient μ2 is small, (friction coefficient μ2 <friction coefficient μ1)), and is positive on the contact surface between the backing 5 and the receiving material 8. Can rotate while sliding and has high frictional force (Friction coefficient μ1 is large (Friction coefficient μ1> Friction coefficient μ2)) The surface material 4 and the lens 2 are in close contact with each other so that no slip occurs. .

  Of course, the rotation of the lens 2 is performed between the universal joint portion 12a provided at the distal end portion of the hairpin 12 and the receiving member 8 of the holder 1. Since the lens 2 easily slides and rotates in the holder 1, the lens 2 and the surface material 4 are not slid with respect to the lens 2, but the backing material 5 and the receiving material 8 are slid. Can prevent scratches on the surface (holding surface 2b) in contact with the surface material 4.

  In addition, the lens 2 and the sheet material 6 function so as not to slide, and conversely, by adopting a structure that actively slides between the sheet material 6 and the receiving material 8, for example, even a small-diameter lens 2 is polished. The lens 2 can be easily rotated by the sliding of the backing material 5 and the receiving material 8 without causing scratches due to the lens 2 sliding with respect to the sheet material 6 during processing.

  At the same time, since the lens 2 having a small thickness as described above also actively slides between the sheet material 6 and the receiving material 8, the lens 2 is scratched against the rotational force generated in the polishing process. It can be easily rotated without being generated, and high polishing accuracy can be obtained by obtaining a stable rotation.

  In particular, with respect to rotation, since it is a sliding friction due to surface contact depending on the friction coefficient of the sheet material 6, there is no “looseness” feeling caused by rolling friction associated with point contact like a ball bearing using a ball. Also, high rigidity can be exhibited against fluctuations in force due to pressure and processing force in polishing. For this reason, the vibration accompanying rotational movement is also suppressed, and higher polishing accuracy can be obtained.

  Further, in the configuration example of FIG. 1 described above, the spring 9 is used to engage the receiving member 8 and the outer cylinder 7, but the same thing can be achieved by using an elastic body such as a compressed rubber or balloon. It is clear that an effect can be obtained.

Further, it is effective for the lens 2 having a thin edge portion 2c and a lens 2 having a relatively small diameter, but it is obvious that it is also effective for other normal size lenses 2.
According to the present embodiment, the lens 2 can be easily taken out from the holder 1, and stable rotation during polishing and high processing accuracy can be obtained while preventing the scratch on the holding surface 2b of the lens 2. Can do.
(Second Embodiment)
3A to 3C illustrate a holder 1A according to a second embodiment of the present invention, which will be described below. FIG. 3A shows a state in which the convex lens is polished using the holder of the present invention, and FIGS. 3B and 3C specifically show the structure and method of use of the holder of the present invention.

  A feature of the holder 1A of the second embodiment is that the sheet material in contact with the lens 2 is configured using two types of sheets. Other configurations are the same as those of the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

  That is, in the holder 1A, the receiving sheet material 13 (first sheet material) that contacts the holding surface 2b of the lens 2 that is the workpiece, and the sliding sheet material 14 that contacts the receiving sheet material 13 and contacts the receiving material 8. The lens 2 is held via the (second sheet material).

  In the holder 1A of the second embodiment, the receiving sheet material 13 that exhibits a high frictional force (friction coefficient μ1) in contact with the holding surface 2b of the lens 2, the receiving sheet material 13 and the lens 2 is received by the receiving material 8. In contrast, the sliding sheet material 14 having a low frictional force (friction coefficient μ2) for smooth sliding and rotation is combined with two types of sheet materials.

  That is, also in this holder 1A, in the receiving sheet material 13 and the sliding sheet material 14, the friction between the sliding sheet material 14 and the receiving material 8 is larger than the friction coefficient μ1 between the receiving sheet material 13 and the holding surface 2b. The coefficient μ2 is set small.

  The receiving sheet material 13 is a sheet material specialized for holding the holding surface 2b of the lens 2 during processing, and is a sheet material having a large friction coefficient (friction coefficient μ1) and high shape adaptability. For example, it is represented by materials such as polyurethane, rubber and sponge.

  On the other hand, the sliding sheet material 14 is a sheet material that has a small friction coefficient (friction coefficient μ2) and is easy to slide in order to smoothly rotate the lens 2 during processing. For example, it is a resinous sheet material containing a solid resin such as Teflon (registered trademark), polyacetal, fluoride resin such as ethylene fluoride, molybdenum disulfide, or carbon.

In the holder 1A of the present embodiment, the sheet material having the two types of characteristics of the receiving sheet material 13 and the sliding sheet material 14 is used separately or integrally.
The example of FIG. 3B is a case where the receiving sheet material 13 and the sliding sheet material 14 are used separately and independently without bonding, and the receiving material 8 is used to eject the processed lens 2 from the holder 1A. The state pushed out from the outer cylinder 7 is shown. By pushing the receiving material 8 out of the outer cylinder 7, the lens 2 and the receiving sheet material 13 are discharged from the holder 1A.

  In this case, since the receiving sheet material 13 is not fixed to either the lens 2 or the sliding sheet material 14, it is discharged alone. At this time, the sliding sheet material 14 is fixed to the receiving material 8 by adhesion. Of course, the same function can be achieved without fixing the sliding sheet material 14, but each time the lens 2 is discharged from the outer cylinder 7, three types of the lens 2, the receiving sheet material 13, and the sliding sheet material 14 are removed from the outer cylinder 7. It is preferable that the sliding sheet material 14 is fixed to the receiving material 8 because it is discharged and the workability deteriorates.

  On the other hand, the example of FIG. 3C shows a case where the receiving sheet material 13 and the sliding sheet material 14 are fixed. In this case, when the lens 2 is discharged from the outer cylinder 7 of the holder 1A in the same manner as in FIG. 3B described above, two types of the lens 2 and the sheet in which the receiving sheet material 13 and the sliding sheet material 14 are integrated are the outer cylinder. 7 is discharged.

  3B and 3C, there are no significant differences in workability because two types are discharged from the outer cylinder 7 of the holder 1A, but the sliding sheet material 14 is obtained by processing the lens 2. Since it always slides with respect to the receiving material 8, it will be easy to wear out. For this reason, the structure in which the receiving sheet material 13 and the sliding sheet material 14 are integrated as shown in FIG. 3C allows the receiving sheet material 13 and the sliding sheet material 14 to be easily exchanged at a time. Although it is excellent in workability, it can be said to be a preferable configuration.

  In any case, although there is some superiority or inferiority in workability, when the receiving sheet material 13 and the sliding sheet material 14 are used separately as shown in FIG. 3B, they are integrated and used as shown in FIG. 3C. Even in this case, it is clear that the same effect can be obtained in terms of function, and selection should be made from the viewpoint of workability.

  Particularly in the present embodiment, the receiving sheet material 13 for holding the lens 2 and the sliding sheet material 14 for easily rotating the lens 2 and the receiving sheet material 13 with respect to the receiving material 8 during processing are freely provided. Since selection is possible, selection and combination of materials suitable for the lens 2 can be easily performed. In particular, it is not necessary to combine the sheet material, and it is only necessary to combine the single materials, so that it can be implemented with commercially available inexpensive materials.

According to the holder 1A of the second embodiment, the lens 2 can be easily removed from the holder 1A, and stable rotation during polishing and high processing accuracy can be achieved while preventing the lens 2 from being scratched. Further, a sheet material that exhibits this function can be arbitrarily selected and used.
(Third embodiment)
4A and 4B show a third embodiment of the present invention and will be described below. FIG. 4A shows a state in which the convex lens is polished using the holder 1B of the present embodiment, and FIG. 4B specifically shows the structure and method of use of the holder 1B of the present embodiment.

  A feature of the holder 1B of the present embodiment is that two types of sheets are used for the sheet material, and a member for supporting the sheet is separately provided for each sheet. Other configurations are the same as those in the above-described embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

  That is, in the case of this holder 1B, as a structure for supporting the lens 2, a receiving material 8 for supporting the holding surface 2b of the lens 2 via the receiving sheet material 13 and a back side of the receiving material 8 are slipped. A support member 8a that supports the sheet member 14 is provided. A plurality of screws 10 are screwed onto the back surface of the support member 8a.

In this case, the friction coefficient μ2 between the sliding sheet material 14 and the receiving material 8 is set to be smaller than the friction coefficient μ1 between the receiving sheet material 13 and the holding surface 2b of the lens 2.
Thereby, the holding surface 2b of the lens 2 does not slide with respect to the receiving sheet material 13, and the receiving material 8 slides with respect to the support material 8a.

  That is, in the holder 1B, the receiving sheet material 13 in contact with the holding surface 2b of the lens 2 that is the workpiece, and the receiving material 8 that supports the lens 2 and the receiving sheet material 13 by fixing the receiving sheet material 13 by adhesion or the like. The sliding sheet material 14 is in contact with the receiving material 8 and allows the receiving material 8 to slide easily, and the supporting material 8a is secured to the sliding sheet material 14 by adhesion or the like. Further, the support member 8a is engaged with the outer cylinder 7 through the screw 10 and the spring 9 in the same manner as in the previous embodiments.

Hereinafter, the operation of the holder 1B of the present embodiment will be described.
In the present embodiment, as described above, the receiving sheet material 13 that is in contact with the holding surface 2b of the lens 2 and exhibits a high frictional force (friction coefficient μ1), and the receiving sheet material 13 and the lens 2 are smoothly slid and rotated. The sliding sheet material 14 is configured to be combined with two types of sheet materials (friction coefficient μ2), and a member that supports the sheet is provided for each sheet.

  The receiving sheet material 13 is a sheet material specialized to hold the holding surface 2b of the lens 2 with a material such as polyurethane, rubber, or sponge as in the above-described embodiments, and has a friction coefficient (friction coefficient μ1 ) Is a sheet material with a large shape adaptability.

  On the other hand, the sliding sheet material 14 is a resinous sheet material containing a solid resin such as fluoride resin such as Teflon (registered trademark), polyacetal, and ethylene fluoride, molybdenum disulfide, and carbon. Is a sheet material that has a small friction coefficient (friction coefficient μ2 (<friction coefficient μ1)) and is easy to slide.

  These two types of sheet materials have contradictory characteristics. In the holder 1B, in order to allow sheets having different characteristics to function in different places, the receiving sheet material 13 is provided with the receiving material 8 and the sliding sheet material. A support material 8a is fixed to 14 so that they do not contact each other.

  Thereby, in the holder 1B, the receiving sheet material 13 is fixed to the receiving material 8, so that the shape adaptability to the holding surface 2b of the lens 2 and the friction coefficient (friction coefficient μ1) are increased. High rigidity can be obtained by being supported by the receiving member 8.

Similarly, the sliding sheet material 14 is fixed to the support material 8a, and the receiving material 8 can be slid and high rigidity can be obtained.
Here, the receiving member 8 and the supporting member 8a are made of metal such as aluminum, brass, and stainless steel, so that the lens 2 can be supported with high rigidity while supporting each sheet.

  Further, since the sliding sheet material 14 has a structure in which the receiving material 8 is slid, the sliding sheet material 14 has a friction (friction) with the receiving material 8 regardless of the material of the receiving sheet material 13 made of a material that is difficult to slide. By reducing the coefficient μ2), higher sliding performance can be obtained. At the same time, since the shape of the sliding sheet material 14 is not affected by the shape of the lens 2, as shown in FIG. 4A and FIG. 4B, a planar shape or the like can be created in accordance with the flat surface at the boundary between the receiving material 8 and the support material 8a. It is possible to configure with an easy shape.

  With the configuration of the holder 1B of the present embodiment, when the lens 2 is discharged from the outer cylinder 7, the receiving sheet material 13 is integrally discharged with the receiving material 8 as a rigid body. Can be handled easily, and workability can be expected to increase.

  At the same time, it is possible to cope with the exchange of only the sheet and the exchange including the receiving material 8 and the support material 8a as the base material. In the latter case, a plurality of receiving materials 8 to which the receiving sheet material 13 is fixed can be prepared in advance. In this case, the exchange workability is also improved.

According to the holder 1B of the third embodiment, the lens 2 can be easily removed from the holder 1B, and stable rotation during polishing and high processing accuracy can be achieved while preventing the lens 2 from being scratched. It can be obtained, and the workability of attaching / detaching the lens 2 to / from the holder 1B is improved.
(Fourth embodiment)
5A and 5B show a holder 1C according to the fourth embodiment of the present invention. As in the previous embodiments, the same parts are designated by the same reference numerals and description thereof is omitted. FIG. 5A shows the normal state of the holder 1C and the state where the lens 2 is held, and FIG. 5B shows the holder 1C. The lens 2 is taken out from the lens.

  A feature of the holder 1C of the present embodiment is that a regulating ring 15 is provided so that the fixing position of the receiving member 8 to be pushed out when the lens 2 is ejected can be freely adjusted in the thickness direction of the lens 2 to be ejected. Is a point.

  The receiving member 8 and the outer cylinder 7 are engaged with each other via a spring 9 that is extendable to engage with each other. Here, the spring 9 is compressed and mounted in the same manner as in the previous embodiments, thereby engaging the receiving member 8 and the outer cylinder 7 with each other.

  Here, in the center portion of the outer cylinder 7, there is a pin hole 7a for inserting a pin 12 attached to a polishing machine (not shown), and a female screw portion 7d is cut on the inner surface of the pin hole 7a. The outer periphery of the ring 15 is screwed. Thereby, the regulation ring 15 moves in the axial direction of the outer cylinder 7 by rotation.

The regulating ring 15 is attached in a desired protruding state from the end surface without the outer cylinder 7 so as to be sandwiched between the receiving member 8 attracted by the contraction force of the spring 9 and the outer cylinder 7.
Here, since the regulating ring 15 is a ring that is sandwiched between the receiving material 8 and the outer cylinder 7 and regulates the position of each other, the material is not particularly specified, but a metal such as brass, aluminum, stainless steel, or polyimide resin For example, a resin that can withstand the compressive force of the spring 9 may be used.

Hereinafter, the operation of the holder 1C of the present embodiment will be described.
According to the holder 1 </ b> C having the above-described configuration, the regulation ring 15 screwed to the outer cylinder 7 is brought into contact with the back surface of the receiving material 8 by the contraction force of the spring 9 and is sandwiched between the outer cylinder 7 and the receiving material 8. become. When the receiving member 8 is brought into contact with and engaged with the restriction ring 15, a gap G is generated between the restriction ring 15 and the outer cylinder 7 as shown in FIG. Become. That is, the receiving position of the receiving member 8 is restricted in the direction protruding from the outer cylinder 7 by the gap G.

  Here, since the regulation ring 15 is screwed to the outer cylinder 7, the position of the regulation ring 15 can be moved in the thickness direction of the lens 2 by appropriately rotating the regulation ring 15. 7, the position in contact with the receiving material 8 can be changed, and the gap G can be variably adjusted.

  When the gap G is changed, the relative retracted position of the receiving material 8 with respect to the outer cylinder 7 changes, so that the position of the outer cylinder 7 and the lens 2 supported by the receiving material 8 also changes and the lens 2 from the outer cylinder 7 changes. The protrusion amount of the edge portion 2c changes.

  In the holder 1C according to the present embodiment, the edge portion 2c is thin and is effective for the lens 2 that is difficult to be removed from the holder 1C, as in the previous embodiments. Since the protrusion amount of the edge portion 2c can be adjusted together with the take-out function, the adjustment can be performed according to the thickness of the edge portion 2c and the quality of the receiving material 8 (dimensional accuracy).

  More specifically, the gap G is changed by changing the mounting position of the restriction ring 15 with the actual lens 2 attached in accordance with the performance of the receiving material 8 and the outer cylinder 7, and the thickness of the edge portion 2c, etc. Accordingly, the protruding amount of the lens 2 can be adjusted as appropriate.

  According to the holder 1C of the fourth embodiment, in addition to the same effects as those of the above-described embodiments, by adjusting the attachment position of the restriction ring 15 attached to the outer cylinder 7, a thin lens of the edge portion 2c. 2, the holding position of the outer cylinder 7 can be easily adjusted.

Note that the same effect can be obtained even if the regulating ring 15 is provided in the outer cylinder 7 having the configuration of the holder 1A illustrated in FIGS. 3A to 3C described above.
Similarly, even if the regulating ring 15 is provided on the outer cylinder 7 having the configuration of the holder 1B illustrated in FIGS. 4A and 4B, the same effect can be obtained.
(Fifth embodiment)
6A and 6B show a holder 1D that is the fifth embodiment of the present invention. As before, the same parts are denoted by the same reference numerals and description thereof is omitted. 6A shows a normal state of the holder 1D and a state where the lens 2 is held, and FIG. 6B shows a state where the lens 2 is taken out from the holder 1D.

  In the holder 1D of the present embodiment, the biasing force that engages the receiving member 8 of the holder 1D and the outer cylinder 7 is realized by the contraction force of the spring 19 (elastic body) in the extended state. . Therefore, the spring 19 is fixed by the fixing pin 18 in the extended state.

  That is, the outer cylinder 7 is provided with a plurality of spring holes 7e around the pin hole 7a, and the back surface of the receiving member 8 accommodated in the outer cylinder 7 corresponds to each spring hole 7e. A plurality of spring holes 8b are provided at the positions.

  An extended spring 19 is installed between the fixed pin 18 protruding from the inner wall of the spring hole 7e and the fixed pin 18 protruding from the inner wall of the spring hole 8b. A biasing force that causes the back surface of the receiving member 8 to be in close contact with the inner end surface of the outer cylinder 7 acts by the contraction force (restoring force) of the spring 19.

The operation of the fifth embodiment will be described below.
In this case, in the holder 1D, the spring 19 that engages the receiving member 8 and the outer cylinder 7 is fixed to both in the stretched state as described above, and therefore, a restoring force that attempts to return to the original length. Is working. The restoring force of the spring 19 is transmitted to the receiving member 8 and the outer cylinder 7 via the fixing pins 18 fixed to both ends thereof, and acts as a force for attracting both. For this reason, the receiving member 8 and the outer cylinder 7 are normally attracted by the spring 19 and the receiving member 8 is drawn into and in contact with the inside of the outer cylinder 7 as shown in FIG. 6A.

  After polishing using the holder 1D, as shown in FIG. 6B, the receiving member 8 is pressed in the direction of protruding from the outer cylinder 7 against the contraction force of the spring 19 as described above. By doing so, the lens 2 is pushed out of the outer cylinder 7 and can be easily taken out.

  At this time, in the holder 1D of the present embodiment, the spring 19 is mounted in an extended state, and the receiving member 8 and the outer cylinder 7 are attracted and held. It is necessary to extrude so as to extend from the mounted state. Further, when the pressing force is released, the extending spring 19 pulls back the receiving member 8 and the outer cylinder 7 to return to the original state, and returns to a state where both are brought into contact with each other and engaged.

  In the holder 1D of the fifth embodiment, since the contraction force of the spring 19 is used, the spring 19 is accommodated inside the spring hole 8b and the spring hole 7e provided in the receiving member 8 and the outer cylinder 7. When the holder 1D is attached to the polishing apparatus M or the like, there is no protrusion from the holder 1D, and installation is easy in a small space.

Note that the same effect can be obtained even if the above-described restriction ring 15 is provided in the configuration of the holder 1D shown in FIGS. 6A and 6B.
As described above, according to the holder of each embodiment of the present invention, even if the edge portion 2c is a thin lens 2 or a small-diameter lens 2, the edge portion 2c is prevented from being damaged or reduced in accuracy. Desorption can be easily performed, and high polishing accuracy and scratches can be prevented by stable rotational movement.

In particular, the present invention is effective for optical elements such as the lens 2 having a small thickness, the lens 2 having a small outer diameter, or the lens 2 that requires high surface accuracy on the polished surface (processed surface 2a).
Needless to say, the present invention is not limited to the configuration exemplified in the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

It is a schematic sectional drawing which shows an example of a structure of the grinding | polishing apparatus provided with the holder which implements the grinding | polishing method which is 1st Embodiment of this invention. It is a schematic sectional drawing which shows an example of the effect | action. It is a schematic sectional drawing which shows an example of the effect | action. It is a schematic sectional drawing which shows the structure and effect | action of a holder which are 2nd Embodiment of this invention. It is a schematic sectional drawing which shows the structure and effect | action of a holder which are 2nd Embodiment of this invention. It is a schematic sectional drawing which shows the structure and effect | action of a holder which are 2nd Embodiment of this invention. It is a schematic sectional drawing which shows the structure and effect | action of a holder which are 3rd Embodiment of this invention. It is a schematic sectional drawing which shows the structure and effect | action of a holder which are 3rd Embodiment of this invention. It is a schematic sectional drawing which shows the structure and effect | action of a holder which are 4th Embodiment of this invention. It is a schematic sectional drawing which shows the structure and effect | action of a holder which are 4th Embodiment of this invention. It is a schematic sectional drawing which shows the structure and effect | action of a holder which are 5th Embodiment of this invention. It is a schematic sectional drawing which shows the structure and effect | action of a holder which are 5th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Holding tool 1A Holding tool 1B Holding tool 1C Holding tool 1D Holding tool 2 Lens 2a Processed surface 2b Holding surface 2c Edge part 3 Polishing plate 3a Polishing action surface 3b Drive shaft 4 Surface material 5 Backing material 6 Sheet material 7 Outer cylinder 7a Screw hole 7b Screw through hole 7c Tapered portion 7d Female screw portion 7e Spring hole 8 Receiving material 8a Support material 8b Spring hole 9 Spring 10 Screw 10a Screw head 12 Hairpin 12a Universal joint 13 Receiving sheet material 14 Sliding sheet material 15 Control ring 18 Fixing pin 19 Spring G Clearance M Polishing device μ1 Friction coefficient μ2 Friction coefficient

Claims (14)

A holding tool for holding an object to be slid in contact with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
Sheet materials having different friction coefficients of the first and second main surfaces that are front and back in the thickness direction;
A receiving material that is located inside the outer cylinder and supports the object to be polished via the sheet material,
An elastic body that urges the receiving member in a direction to be pulled into the outer cylinder;
A holder characterized by comprising.   2. The holder according to claim 1, wherein the second main material is in contact with the receiving material with respect to a friction coefficient of the first main surface of the sheet material that is in contact with a holding surface opposite to a surface to be processed of the workpiece. A holder having a smaller coefficient of friction on the surface. A holding tool for holding an object to be slid in contact with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
A receiving sheet material in contact with the holding surface opposite to the processing surface of the object to be polished;
A sliding sheet material in contact with the receiving sheet material and having a smaller coefficient of friction than the receiving sheet material;
A support material that is located inside the outer cylinder and is fixed to the sliding sheet material to support the object to be polished,
An elastic body that urges the support member in a direction in which the support member is pulled into the outer cylinder;
A holder characterized by comprising. A holding tool for holding an object to be slid in contact with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
A receiving sheet material in contact with the holding surface opposite to the processing surface of the object to be polished;
A receiving material that is located inside the outer cylinder and is fixed to the receiving sheet material and supports the object to be polished;
A sliding sheet material in contact with the receiving material and having a smaller coefficient of friction than the receiving sheet material;
A support material that is located inside the outer cylinder, is fixed to the sliding sheet material, and supports the object to be polished through the receiving material;
An elastic body that urges the receiving member in a direction to be pulled into the outer cylinder;
A holder characterized by comprising. A holding tool for holding an object to be slid in contact with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
Sheet materials having different friction coefficients of the first and second main surfaces that are front and back in the thickness direction;
A receiving material that is located inside the outer cylinder and supports the object to be polished via the sheet material,
An elastic body that urges the receiving material in a direction to be pulled into the outer cylinder;
A regulating ring that supports the relative position of the outer cylinder and the receiving member so as to be movable and adjustable in the thickness direction of the object to be polished;
A holder characterized by comprising.   The holder according to claim 5, wherein the second main member that contacts the receiving member with respect to a friction coefficient of the first main surface that contacts the holding surface opposite to the processing surface of the object to be polished of the sheet material. A holder having a smaller coefficient of friction on the surface. A holding tool for holding an object to be slid in contact with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
A receiving sheet material in contact with the holding surface opposite to the processing surface of the object to be polished;
A sliding sheet material in contact with the receiving sheet material and having a smaller coefficient of friction than the receiving sheet material;
A receiving material that is located inside the outer cylinder and is fixed to the sliding sheet material to support the object to be polished;
An elastic body that urges the receiving member in a direction to be pulled into the outer cylinder;
A regulating ring that supports the relative position of the outer cylinder and the receiving member so as to be movable and adjustable in the thickness direction of the object to be polished;
A holder characterized by comprising. A holding tool for holding an object to be slid in contact with a polishing tool,
An outer cylinder that holds the outer periphery of the object to be polished;
A receiving sheet material in contact with the holding surface opposite to the processing surface of the object to be polished;
A receiving material that is located inside the outer cylinder and is fixed to the receiving sheet material and supports the object to be polished;
A sliding sheet material in contact with the receiving material and having a smaller coefficient of friction than the receiving sheet material;
A support material that is located inside the outer cylinder, is fixed to the sliding sheet material, and supports the object to be polished through the receiving material;
An elastic body that urges the support member in a direction in which the support member is pulled into the outer cylinder;
A regulating ring that supports the relative position of the outer cylinder and the receiving material through the support material so as to be movable and adjustable in the thickness direction of the object to be polished;
A holder characterized by comprising.   The holder according to any one of claims 1 to 8, wherein the elastic body is made of a spring or rubber, and an elastic force that presses the outer cylinder and the receiving material is compressed by the elastic body. A holding tool generated by a restoring force.   The holder according to any one of claims 1 to 8, wherein the elastic body is made of a spring or rubber, and the step setting body in which an elastic force pressing the outer cylinder and the receiving member is extended. It is generated by the restoring force of the holder.   The holder according to any one of claims 7 to 9, wherein the outer cylinder, the receiving member, and the regulating ring that are pressed against each other by an elastic body are movable in a thickness direction of the object to be polished. A holding tool characterized by being supported by. A polishing method for supporting a holding surface opposite to a processing surface in sliding contact with a polishing tool of an object to be polished on a receiving material via a sheet material,
A polishing method, wherein the friction coefficient of the second main surface of the sheet material in contact with the receiving material is made smaller than the friction coefficient of the first main surface of the sheet material in contact with the holding surface. The polishing method according to claim 12, wherein
The polishing method according to claim 1, wherein the sheet material is made of different materials and has a multilayer structure including a first sheet material in contact with the holding surface and a second sheet material in contact with the receiving material. The polishing method according to claim 13, wherein
A polishing method, wherein the receiving material is sandwiched between the first and second sheet materials, and the receiving material is supported by a support material via the second sheet material.