JPH1110503A - Lens-holding member for grinding and polishing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens holding member which can mount and dismount a lens easily quickly and can easily replace an outer cylinder that is apt to suffer damage in a lens-holding member employed in working a single spherical or planar lens. SOLUTION: A lens-holding member 1 for holding a lens La when grinding and polishing the lens La comprises an inner piece 2, an outer bottomed tubular cylinder 3 replacably fixed to the inner piece 2, and a lens-receiving seat 4. The outer cylinder 3 contacting and holding the outer periphery of the lens La has at least one or more cutouts 5 so that it can be gripped with fingers at the outer periphery of the lens La, whereby the lens La can be easily mounted or dismounted. The lens La held by the lens-holding member 1 is pressed against a tool 31 via a pin 30 and is ground and polished by the relative movement of the lens La rotated by the rotation of the tool 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to grinding spherical or planar lenses used for cameras,
The present invention relates to a lens holding member that holds a lens when performing polishing.

[0002]

2. Description of the Related Art Lens holding members (lens holders) conventionally used for processing single lenses such as spherical or planar lenses used for cameras and videos are shown in FIGS. 8 (a) and 8 (b). As shown in the figure, a main body 10 having a kansashi receiving part 102a provided in the center of the bottom of the main body.
2 and an outer cylinder portion 103 having an inner ring portion 103a having an inner diameter that comes into contact with the outer ring portion of the lens Lo, i.e., an edge thereof, and a lens receiving sheet 104 is disposed on a lens receiving surface of the main body portion 102 to form a lens. Holding member 10
1. Also, as shown in FIG.
A lens holding member 101 of a type in which a kansashi receiving chip 102b made of cemented carbide is embedded in a kansashi receiving part 102a.
Is also known. Then, these lens holding members 10
When the lens Lo is ground and polished using the lens 1, the lens Lo is attached to the lens holding member 101, the inner ring portion 103a of the outer cylindrical portion 103 and the lens receiving sheet 104.
Is held in contact with. The lens Lo attached to the lens holding member 101 in this manner is mounted on a grinding and polishing device and is ground and polished. After the processing, the lens Lo is removed from the processing device and the lens Lo is removed from the lens holding member 101. New lens Lo to be processed next
Is attached to the lens holding member 101 to perform grinding and polishing.
The attachment / detachment to the lens 1 and the processing of the lens are repeatedly performed.

FIG. 9 is a partial cross-sectional view of a processing mode of a convex lens using a conventional lens holding member. Referring to FIG. 9, a method of grinding and polishing a lens (hereinafter simply referred to as a grinding process) and a method thereof will be described. The method of attaching and detaching the lens will be further described.

After the convex lens Lo is attached to the lens holding member 101, the lens holding member 101 is pivotally supported by a wrench 130 which can swing left and right or back and forth in the figure, and can be rotated about a tool rotation axis 132. To the grinding tool 131 provided at And when weight is given to Kansashi 130,
The lens Lo is connected to the grinding tool 1 via the lens holding member 101.
31 and the grinding tool 131 is
, The lens Lo and the lens holding member 101 are subordinately rotated about the lens rotation axis 133. At the same time, the grinding liquid (or polishing liquid) is supplied from the nozzle 140.
141 is supplied, and the processing of the lens proceeds. When the predetermined processing is completed, the lens Lo is taken out of the apparatus together with the lens holding member 101. And
The outer ring portion of the lens Lo protruding from the tip of the outer cylindrical portion 103 of the lens holding member 101, that is, the edge of the lens is grasped with a finger, and the lens Lo is removed from the lens holding member 101. Thereafter, a new lens Lo to be processed next is quickly attached to the lens holding member 101, and the lens Lo and the lens holding member 101 are mounted again between the kansashi 130 and the grinding tool 131 to perform processing. As described above, when the lens is ground, the attachment / detachment of the lens to / from the lens holder, the attachment / detachment to the processing device, and the processing are repeatedly performed. That is, the work of attaching and detaching the individual lenses to and from the lens holding member is required every time the individual lenses are processed.

[0005] In addition, due to the repetitive processing and attachment / detachment of the lens to / from the lens holding member, the outer cylindrical portion of the lens holding member, in particular, is liable to be damaged or damaged due to wear, fatigue or disturbance factors. If the lens holding member cannot be securely held, the use of the lens holding member becomes impossible, and the lens holding member has to be disposed of and replaced with a new lens holding member.

[0006]

In the above-described conventional grinding of a lens, it is necessary to remove the lens from the lens holding member every time the processing is completed.
Since the lens is pressed against the lens receiving sheet of the lens holding member during the grinding process, the adhesion between the back surface of the lens and the lens receiving sheet is increased, and the lens is in a state of being attracted to the lens receiving sheet. It is difficult to remove. Furthermore, when the lens is removed, a grinding liquid (polishing liquid) is attached to the lens and the lens holding member, and it is difficult to remove the lens by grasping it with a finger.
In addition, when the lens to be processed is a lens with a small edge, the protruding portion of the lens protruding from the tip of the outer cylindrical portion of the lens holding member is extremely small, so it takes time to remove the lens from the lens holding member. Was. As described above, it takes a lot of trouble and time to attach and detach the lens to and from the lens holding member.

Further, the inner ring portion and the tip portion of the outer cylindrical portion of the lens holding member are very easily worn and easily damaged. For this reason, if the inner diameter of the inner ring of the outer cylinder gradually increases or dents or distortions occur at the tip of the outer cylinder due to repeated use of the lens holding member, the appearance accuracy and processing accuracy of the lens may be reduced. It had a problem of adverse effects.

Accordingly, the present invention has been made in view of the above-mentioned unsolved problems of the prior art, and is a lens used for processing a single lens of a spherical or planar lens used for a camera or a video camera. Provided is a lens holding member that facilitates attachment / detachment of a lens and that can easily be replaced even when an outer cylinder of the lens holding member is damaged due to wear, aging, or disturbance. It is intended to do so.

[0009]

In order to achieve the above-mentioned object, a lens holding member for grinding and polishing according to the present invention presses a spherical or planar lens onto a spherical or planar tool to rotate the tool. When grinding and polishing the spherical or planar lens by the relative movement of the subordinately rotating lens, an outer cylinder that holds an outer ring portion of the lens of the lens holding member in a lens holding member that holds the lens. The portion is provided with at least one notch.

Further, in the lens holding member for grinding and polishing according to the present invention, it is preferable that the outer cylindrical portion for holding the outer ring portion of the lens of the lens holding member is replaceably attached to the lens holding member body.

[0011]

In a lens holding member used for processing a single lens of a spherical or planar lens used for a camera, a video or the like, at least one notch is provided in an outer cylindrical portion for holding an outer ring portion of the lens. As a result, the attachment and detachment work of the lens to and from the lens holding member can be easily and quickly performed, and the outer cylindrical portion which is easily damaged by wear, aging, or disturbance factors in the lens holding member is replaceably provided. Thus, by exchanging only one part, the lens can be processed without adversely affecting the appearance accuracy and the processing accuracy of the lens.
Therefore, it is possible to suppress a loss time relating to processing and attachment / detachment of the lens, and further to minimize a cost relating to lens processing.

[0012]

Embodiments of the present invention will be described with reference to the drawings.

FIGS. 1A and 1B show a first embodiment of a lens holding member according to the present invention. FIG. 1A is a plan view of the lens holding member, and FIG. 1B is a sectional view of the right half of the lens holding member. It is a side view, (c) is the typical perspective view which looked at the outer cylinder which constitutes a lens holding member from the bottom.

In FIG. 1, a lens holding member 1 comprises a middle piece 2, an outer cylinder 3, and a lens receiving sheet 4 attached to the surface of the middle piece 2, and is provided at the center of the bottom of the disk-shaped middle piece 2. The outer cylinder 3 has a bottomed cylindrical shape having an inner ring portion 3a having an inner diameter into which the center piece 2 and the lens La can be fitted and a bottom portion 3c having a through hole 3b formed therein. Is formed. The outer cylinder 3 is detachably fixed to the bottom surface 2b of the middle piece 2 by a plurality of fixing screws 6, 6... Via screw mounting holes 3d provided in the bottom 3c. The lens holding member 1 thus configured is
The lens receiving sheet 4 attached to the intermediate piece 2 contacts the bottom surface of the lens La, and the inner ring portion 3a of the outer cylinder 3 contacts the outer ring portion of the lens, that is, the edge, to hold the lens La.
Further, at least one notch 5, 5,... Is provided at the upper end of the outer cylinder 3, and the notches 5, 5,.
When attaching / detaching the lens La to / from the lens holding member 1,
It is configured such that the edge of the lens La can be reliably grasped by a finger through the notches 5 and 5. In FIG. 1, two notches 5, which face each other in the diameter direction,
5 is provided.

FIG. 2 shows a second embodiment of the lens holding member of the present invention. FIG. 2 (a) is a plan view of the lens holding member, and FIG. 2 (b) is a cross section of the right half of the lens holding member. FIG.

In FIG. 2, the lens holding member 11 includes a middle piece 12, an outer cylinder 13, and a lens receiving sheet 14 attached to the surface of the middle piece 12, and is provided at the center of the bottom surface of the disk-shaped middle piece 12. Is provided with a Kanzashi receiving portion 12a, and the outer cylinder 13 is formed in a cylindrical shape having an inner ring portion 13a having an inner diameter into which the middle piece 2 and the lens can be fitted,
The outer cylinder 13 is connected to the middle piece 1 through a plurality of screw mounting holes 13d.
Are fixed to the second side surface 12c with a plurality of fixing screws 16, 16... Further, at least one notch 15, 15 is provided at the upper end of the outer cylinder 13, similarly to the lens holding member 1. FIG. 2 also shows an example in which two notches 15, 15 diametrically opposed to each other are provided. In the lens holding member 11 configured as described above, similarly to the lens holding member 1 described above, the lens receiving sheet 14 attached to the center piece 12 is in contact with the bottom surface of the lens, and the inner ring portion 13a of the outer cylinder 13 is formed. Abuts against the outer ring portion of the lens, that is, the edge, to hold the lens. Further, although an example in which a large-diameter stepped portion 12d is provided below the middle piece 12, the stepped portion 12d is not necessarily required.

Next, a method for processing a convex lens La used in a camera or a video camera using the lens holding member 1 shown in FIG. 1, a method for attaching and detaching the lens, and a method for replacing the outer cylinder will be described. FIG. 3 is a partial cross-sectional view illustrating a processing mode of the convex lens La attached to the lens holding member 1. Note that, as the convex lens La, an example will be described in which a convex lens having an outer ring portion of the lens, that is, a lens with a thin edge is used.

In FIG. 3, the kansashi 30 is constructed so as to be swingable by a certain cycle left and right or back and forth and can be fixed at a certain inclination angle. It is provided so that it can rotate as. The lens holding member 1 to which the lens La is attached is mounted between the screw 30 and the grinding tool 31 and is pivotally supported by the screw 30. In this state,
When a load is applied to the kansashi 30, the lens holding member 1
Is pressed into contact with the grinding tool 31.
Then, when the grinding tool 31 rotates about the tool rotation axis 32, the lens La and the lens holding member 1 start subordinate rotation about the lens rotation axis 33. At the same time, the grinding fluid 41 is supplied from the nozzle 40, and the processing of the lens proceeds for a preset time. When the predetermined processing is completed, the lens La is taken out of the apparatus together with the lens holding member 1.

When the processed lens La is detached from the lens holding member 1, the lens La is subjected to a load via the wrench 30 during the grinding process. The lens La is pressed against the sheet 4, and is further absorbed by the grinding liquid 41, so that the lens La sticks to the lens receiving sheet 4 and is in a state of being adsorbed. For this reason, although it is extremely difficult to remove the lens La, in the lens holding member 1 of the present invention, a finger is inserted into the notches 5 and 5 provided in the outer cylinder 3 so that the outer ring portion of the lens La, The edge can be reliably grasped, and the lens La can be quickly and easily removed from the lens holding member 1. Thereafter, a new lens La to be processed next is immediately inserted into and attached to the lens holding member 1, and the next processing can be continued. As described above, the processed lens La is easily removed from the lens holding member 1, and the next new lens La is quickly inserted and attached to the lens holding member 1, that is, the lens La is attached to the lens holding member 1. The attachment and detachment can be performed easily and quickly.

Next, with respect to the time required for attaching and detaching the lens to and from the lens holding member when processing a convex lens having a small edge, the case where the lens holding member 1 of the first embodiment of the present invention is used and the conventional lens holding member will be described. A comparative experiment using (a lens holding member 101 shown in FIG. 8) was performed.
When the number was 0, the results as shown in Table 1 below were obtained.

[0021]

[Table 1] As shown in Table 1, the attachment / detachment loss time of the φ20 edge convex lens is 21.6 hours per year, and the attachment / detachment time varies for each lens. Although the loss is small, by using the lens holding member of the present invention,
Excessive time can be saved.

Further, when the lens is mounted on the lens holding member and the lens is ground, the lens causes small vibrations, rotation, and the like in the lens holding member 1.
Due to this phenomenon, during lens processing, the processing is repeated while the edge of the lens and the inner ring of the outer cylinder are constantly rubbed, and the diameter of the inner ring of the outer cylinder of the lens holding member gradually increases, The lens cannot be held securely. Further, the tip of the outer cylinder of the lens holding member is easily worn or damaged. As described above, when the inner diameter of the inner ring portion of the outer cylinder is enlarged or a dent or distortion occurs at the tip of the outer cylinder due to repeated use of the lens holding member, the external appearance accuracy and processing accuracy of the lens are adversely affected. Therefore, it is necessary to replace the lens holding member. In such a case, all of the conventional lens holding members have to be discarded. However, in the present embodiment, the outer cylinder 3 which is easily damaged is replaced with the middle piece 2 because Only the outer cylinder 3 fixed by the fixing screw 6 or the like can be replaced. The method of replacing the outer cylinder 3 is as follows. The fixing screws 6, 6,... Tightened on the bottom surface 2b of the middle piece 2 of the lens holding member 1 shown in FIG. Insert the middle piece 2 into the outer cylinder 3
Are fixed with fixing screws 6, 6,... The outer cylinder can be easily replaced by such a simple method.

FIG. 4 shows a double kansashi type processing mode using the lens holding member of the present invention. It is needless to say that the lens holding member of the present invention can also be used in the processing of a lens of the double kansashi type, and the method of attaching and detaching the lens and the method of replacing the outer cylinder can be performed in the same manner as described above. .

Next, FIG. 5 shows a processing method for processing a concave lens Lb used in a camera, a video camera, or the like using the lens holding member 11 shown in FIG. 2, a method for attaching / detaching the lens, and a method for replacing the outer cylinder. This will be described with reference to FIG. FIG. 5 is a partial cross-sectional view illustrating a processing mode of the concave lens Lb attached to the lens holding member 11.

In FIG. 5, the kansashi 30 is fixed vertically, and the grinding tool 51 provided so as to be rotatable about the tool rotation axis 32 is freely tiltable and can be fixed at a certain tilt angle. Further, it is configured to be able to swing in a certain cycle. The lens holding member 11 to which the concave lens Lb is attached is mounted between the screw 30 and the grinding tool 31 and is pivotally supported by the screw 30. In this state, when a load is applied to the screw 30, the lens Lb held by the lens holding member 11 is pressed against the grinding tool 31. Then, when the grinding tool 31 rotates about the tool rotation axis 32, the lens Lb and the lens holding member 11 start subordinate rotation about the lens rotation axis 33. At the same time, the grinding fluid 41 is supplied from the nozzle 40, and the lens processing proceeds in a preset time.
When the predetermined processing is completed, the lens Lb is taken out of the apparatus together with the lens holding member 11.

When the processed lens Lb is removed from the lens holding member 11, the lens Lb is a concave lens, so that the outer ring portion of the lens, that is, the edge is thick and easy to grasp. Due to the load being applied via the kansashi 30, it is pressed against the lens receiving sheet 14 of the lens holding member 11,
Further, the lens Lb is attracted to the lens receiving sheet 14 by the permeation of the grinding fluid 41 and is in a state of being adsorbed. For this reason, although it is difficult to remove the lens Lb, in the lens holding member 11 of the present invention, it is necessary to insert a finger into the cutouts 15 and 15 provided in the outer cylinder 13 to grasp the edge of the lens Lb. And the lens Lb
Can be quickly and easily removed from the lens holding member 11. After that, the lens L to be processed immediately next
b can be inserted and attached to the lens holding member 11, and the next processing can be continued. Thus, the processed lens Lb is easily removed from the lens holding member 11,
The next lens Lb can be quickly inserted into and attached to the lens holding member 11, that is, the lens Lb can be easily and quickly attached to and detached from the lens holding member 11.

Next, regarding the time required for attaching and detaching the lens to and from the lens holding member when processing the concave lens, the case where the lens holding member 11 according to the second embodiment of the present invention is used and the conventional lens holding member (FIG. A comparison experiment using the lens holding member 101) shown in FIG.
The following Table 2 was obtained when the monthly production of the concave lens was 5000.

[0028]

[Table 2] As shown in Table 2, the attachment / detachment loss time of the φ20 concave lens is as long as 15.0 hours per year, and the attachment / detachment time varies for each lens. Although small, the use of the lens holding member of the present invention can save an excessive amount of time over the year.

Further, when the lens is mounted on the lens holding member and is ground, the lens is subject to phenomena such as microvibration and rotation in the lens holding member. Due to this phenomenon, during lens processing, the processing is repeated while the edge of the lens and the inner ring of the outer cylinder are constantly rubbed, and the diameter of the inner ring of the outer cylinder of the lens holding member gradually increases, The lens cannot be held securely. Further, the tip of the outer cylinder of the lens holding member is easily worn or damaged. Thus, the lens holding member is
If the inner diameter of the inner ring of the outer cylinder increases due to repeated use, or if dents or distortions occur at the tip of the outer cylinder, the lens appearance member and machining accuracy will be adversely affected. I need to do it. In such a case, in the present embodiment, only the outer cylinder 13 fixed with the fixing screw 16 or the like can be replaced. The method of replacing the outer cylinder 13 includes a fixing screw 16 which is fastened to the outer ring surface 12c of the middle piece 12 of the lens holding member 11 shown in FIG.
16 are removed, the outer cylinder 13 is removed from the middle piece 12, the middle piece 12 is inserted into a new outer cylinder 13, and the outer cylinder 13 is
Are fixed to the outer race surface 12c with fixing screws 16, 16. The outer cylinder can be easily replaced by such a simple method.

Also, as shown in FIG. 6, the lens holding member 11 shown in FIG. 2 can be used in the processing method of the oscillating arc swing type as well as the processing of the concave lens Lb shown in FIG. The method of attaching and detaching the lens and the method of replacing the outer cylinder can be performed in the same manner as described above.

Next, FIG. 7 shows a processing mode of the flat lens Lc using the lens holding member 1 shown in FIG. The method of attaching and detaching the plane lens Lc and the method of replacing the outer cylinder 3 can be performed in the same manner as the method of attaching and detaching the convex lens La and the method of replacing the outer cylinder described above.
Regarding the time required for attaching and detaching the lens when processing c,
A comparative experiment was performed between the case where the lens holding member 1 according to the first embodiment of the present invention was used and the case where a conventional lens holding member (the lens holding member 101 shown in FIG. 8) was used.
When the monthly production was 800 with the 00 flat lens, the results shown in the following Table 3 were obtained.

[0032]

[Table 3] As shown in Table 3, the loss of attachment / detachment time of the flat lens is different from that of mass-produced lenses such as the convex lens and the concave lens described above, but it is possible to save 1.9 hours of power over the year.

[0033]

Since the present invention is constructed as described above, a lens holding member used for processing a single lens of a spherical or planar lens used for a camera or a video camera is used as a lens holding member for a lens. By adopting a structure that allows easy and quick attachment / detachment of the lens holding member, it is possible to suppress a loss time in processing and attaching / detaching the lens. With the structure in which the parts can be exchanged, the cost for lens processing can be minimized. In addition, it is possible to provide a versatile lens holding member that can be used for single lens processing of a lens to be processed via the lens holding member without any problem even if the lens shape and the processing device are different.

[Brief description of the drawings]

1A and 1B show a first embodiment of a lens holding member of the present invention, wherein FIG. 1A is a plan view of the lens holding member, and FIG. 1B is a side view showing a right half of the lens holding member in cross section. ,
(C) is a schematic perspective view of the outer cylinder constituting the lens holding member as viewed from the bottom side.

2A and 2B show a second embodiment of the lens holding member of the present invention, wherein FIG. 2A is a plan view of the lens holding member, and FIG. 2B is a side view showing a right half of the lens holding member in cross section. .

FIG. 3 is a partial cross-sectional view illustrating a processing mode of a convex lens using the lens holding member of the present invention.

FIG. 4 is a partial cross-sectional view illustrating a processing mode of a lens of a double kansashi type using the lens holding member of the present invention.

FIG. 5 is a partial cross-sectional view illustrating a processing mode of a concave lens using the lens holding member of the present invention.

FIG. 6 is a partial cross-sectional view illustrating a processing mode of a concave lens of a kansashi arc swing type using the lens holding member of the present invention.

FIG. 7 is a partial cross-sectional view illustrating a processing mode of a flat lens using the lens holding member of the present invention.

FIG. 8A is a plan view of a conventional lens holding member, FIG. 8B is a side view showing a right half thereof in cross section,
(C) is a cross-sectional view of a conventional lens holding member of a type in which a wrought chip made of cemented carbide is embedded in a wrought receiving part.

FIG. 9 is a partial cross-sectional view illustrating a processing mode of a lens using a conventional lens holding member.

[Explanation of symbols]

 1, 11 Lens holding member 2, 12 Middle piece 3, 13 Outer cylinder 4, 14 Lens receiving sheet 5, 15 Notch 6, 16 Fixing screw 30 Kansashi 31 Grinding tool La Convex lens Lb Concave lens Lc Flat lens

Claims (2)

[Claims] When a spherical or planar lens is pressed against a spherical or planar tool, and the spherical or planar lens is ground and polished by the relative movement of the lens which rotates in accordance with the rotation of the tool. A lens holding member for holding a lens, wherein at least one notch is provided in an outer cylindrical portion of the lens holding member for holding an outer ring portion of the lens, wherein the lens holding member is used for grinding and polishing. Element. 2. The lens holding member for grinding and polishing according to claim 1, wherein an outer cylindrical portion of the lens holding member for holding an outer ring portion of the lens is exchangeably attached to the lens holding member main body.