JP2003127053A - Polishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel polishing device in which adjustment work of the device can be easily executed by unnecessitating the adjustment work of a mounting part of an upper rocking shaft and a rocking arm, and at the same time, skill is not required for the adjustment work. SOLUTION: A lower rotary shaft 11 is mounted to a rotary frame 15 that is constituted so as to be rotatable around a rotary axis S and the rotary frame 15 is mounted to a horizontal movement base 16. The horizontal movement base is mounted slidably in the forward and backward directions to a horizontal movement guide 18 via a horizontal movement frame 17 and the horizontal movement guide 18 is fixed to the vertical movement base 19. The vertical movement base 19 is mounted to the vertical movement guide 22 so as to be freely movable in the vertical direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing device, and more particularly to a device structure suitable as a polishing device for polishing a lens.

[0002]

2. Description of the Related Art Generally, conventional lens polishing apparatuses include an upper shaft swinging type polishing apparatus called an Oscar type and a lower axis swinging type polishing apparatus. In any of the polishing methods, in many cases, the lens is fixed to one of a pair of polishing members that are in sliding contact with the lens by wax, chucking, etc., and the polishing member with the lens fixed is rotated to remove loose abrasive grains. While supplying the polishing liquid containing the polishing liquid, the polishing surface of the other polishing member is swung with respect to the surface of the lens for polishing.

In a polishing apparatus called an Oscar type, a swing shaft member called a Kanzashi is attached to a swing arm configured to enable various swing operations such as reciprocating swing and swing swing. The swing shaft member is attached to the lens holder, which is one polishing member, at an angle. On the other hand, the other polishing member, the polishing plate, is attached to a lower rotation shaft that is configured to be rotatable.

In the conventional polishing apparatus, as an upper shaft structure, a swing mechanism for reciprocally swinging the swing arm left and right, or swinging in a circular or elliptical shape is connected to the base of the swing arm. Has been done. A pressure mechanism composed of an air cylinder or the like for applying a predetermined polishing pressure to the lens holder is connected to the tip end portion of the swing arm via a swing shaft member. The swing shaft member is attached to the swing arm so that its mounting position can be adjusted only in the vertical direction or in the vertical direction and the front-back direction.

Further, among the conventional polishing devices, a device capable of moving the lower rotary shaft in the front-rear direction, such as the device devised by the present inventor, or the lower rotary shaft with respect to the vertical posture. There is also a proposal that can be tilted. Further, as described above, the swing shaft member and the polishing member are not attached at an angle, but the swing shaft member is fixed to the polishing member so that the swing shaft moves along the lens polishing surface. There are also cases where a mechanism for swinging is used.

[0006]

By the way, in the above-mentioned conventional polishing apparatus, the height of the lens surface changes due to the variation of the lens thickness and the thickness of the wax for sticking to the polishing dish, and as described above, If the rotary shaft is configured to be movable in the front-rear direction or the angle of the lower rotary shaft is adjustable, the height and front-back position of the polishing plate will change depending on the degree of adjustment. At the same time, it is necessary to adjust the mounting portion between the swing arm and the swing shaft member. This mounting part usually has a structure in which a through hole is formed in one of the rocking shaft member and the rocking arm, and the other end is inserted into the through hole and fixed with a set screw, etc. There is a problem that you have to rely on your intuition and require trial and error and skill. In particular, since the above-mentioned mounting portion is generally located at a position where the polishing liquid is easily attached, the above-mentioned adjustment work is made more difficult.

Further, since the structure of the mounting portion of the rocking shaft member and the rocking arm as described above reduces the rigidity of the entire upper shaft structure, a rigidity sufficient to maintain the polishing accuracy is ensured. Therefore, there is a problem in that the weight around the mounting portion is increased. The increase in the weight of the upper shaft structure makes it difficult to control the polishing pressure, and for example, the polishing pressure cannot be sufficiently reduced, so that the lens is deformed when a thin lens is processed and the optical surface accuracy of the lens cannot be obtained. There is a problem such as.

Furthermore, in recent years, the shortage of skilled workers has become serious due to the shortage of young workers and the increase in overseas workers in the workplaces where the working environment is poor. Is extremely important, the demand for a lens polishing apparatus that enables adjustment work that does not require skill is rapidly expanding.

Therefore, the present invention solves the above-mentioned problems, and it is an object of the present invention to make the adjustment work of the device easy by eliminating the need for the adjustment work of the mounting portion of the upper swing shaft and the swing arm. It is an object of the present invention to provide a new polishing apparatus that can be performed and does not require any skill for the adjustment work.

[0010]

In order to solve the above-mentioned problems, a polishing apparatus of the present invention comprises a first polishing member, a swinging member connected to the first polishing member, and the first polishing member. And a second polishing member opposed to each other via a material to be polished, a swing drive unit that swings the swing member, and a rotation drive unit that rotates the second polishing member around its axis. A polishing device for polishing an abrasive material, comprising: an inclination adjusting means capable of changing an inclination angle of a rotation axis of the second polishing member with respect to the swing member; A first moving means for moving the position of the second polishing jig in a direction, and a position for moving the second polishing member in a second direction along the changing surface while intersecting the first direction. A second moving means is provided.

According to the present invention, when the rotation axis of the second polishing member is adjusted to the predetermined tilt angle by the tilt adjusting means, the first moving means and the second moving means move along the changing surface of the tilt angle. , The second polishing member can be moved in two directions intersecting with each other, so that when the positions of the first polishing member and the second polishing member are matched, It is sufficient to correct only the position, and it is possible to eliminate the need to adjust the position of the first polishing member. Therefore, since the mechanism on the rocking side can be simply configured and the rigidity can be increased without increasing the weight, the polishing pressure can be easily controlled and the positioning accuracy of the polishing member can be improved. Can be improved.

In particular, when the first polishing member is arranged on the upper side and the second polishing member is arranged on the lower side, the weight increase of the first polishing member can be avoided, so that the polishing pressure can be reduced. Further, it is possible to improve the accuracy of the swinging motion.

The above polishing apparatus can be applied to either an upper shaft swing type or a lower shaft swing type, and a swing mechanism using a hairpin or the like (that is, a swing shaft member and a swing shaft member). (Attached to the first polishing member at an angle)
In addition to this, the present invention can be applied to a ball-swinging mechanism.

The tilt angle changing surface means that when a virtual reference axis and a radial axis intersecting at the tilt angle are set to measure the tilt angle, when the tilt angle changes. It refers to a virtual surface that always includes both the reference axis and the rotating radial axis.

In the present invention, detection for detecting the tilt angle set by the tilt adjusting means, the first moving means and the second moving means and the position of the second polishing member in the first direction and the second direction. Means are preferably provided. According to the present invention, by providing the detecting means, the position of the second polishing member and the inclination angle of the rotation axis thereof can be objectively known, and the values of the position and the inclination angle can be set in advance. The polishing can always be performed under the same conditions regardless of the skill level of the operator.

In the present invention, the detecting means is preferably a digital counter directly or indirectly attached to the drive shafts of the tilt adjusting means, the first moving means and the second moving means. The position and inclination angle of the second polishing member can be easily grasped by the digital counter, and the ambiguity of setting at the time of adjusting the position and inclination angle can be reduced.

In the present invention, the second polishing member is rotatably supported by a rotating frame which is configured to be rotatable by the inclination adjusting means, and the rotating frame of the first moving means or the second moving means. The first moving base is rotatably attached to a primary moving base movable by one side, and the primary moving base is attached to a secondary moving base movable by the other of the first moving means or the second moving means. It is preferable that the inclination adjusting means is configured to set the inclination angle of the rotating frame with the primary movement base as a reference.

Further, in the present invention, an upper cover and a lower cover for accommodating the first polishing member and the second polishing member are provided, and the upper cover includes the first polishing member and the second polishing member. It is formed in the shape of a frame that surrounds the plane,
The lower cover is formed in a bottomed shape having a predetermined depth so as to cover the first polishing member and the second polishing member from below, and covers the gap between the upper cover and the lower cover. A flexible member is arranged, and one of the upper cover and the lower cover is configured to be tiltable together with the second polishing member or its supporting structure, and movable in the first direction and the second direction. Is preferred.

Further, in the present invention, the first direction is a vertical direction, the second direction is a horizontal direction, and the other one of the upper cover and the lower cover is the second polishing member or its supporting structure. At the same time, it is preferable to be configured to be movable in the second direction.

In each of the above inventions, the first moving means may be vertically movable and the second moving means may be horizontally movable. The tilt adjusting means includes a tilt drive shaft (rotatably supported by the primary movement base) configured to be rotatable, a screw shaft bendably connected to the tilt drive shaft, and the screw. It may have a nut portion that is screwed onto the shaft and is fixed to the second polishing member (or the rotating frame).

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of a polishing apparatus according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a vertical cross-sectional view of the device of this embodiment as seen from the right side, and FIG. 2 is a vertical cross-sectional view of the device of this embodiment as seen from the front. In each of the drawings, a part of the structural portion on the front side that does not appear in the vertical cross section is shown by a chain line.

A lower rotary shaft 11 is rotatably supported by a lower bearing 21 inside a frame 10 formed in the shape of a box frame. The lower rotary shaft 11 is rotationally driven by a drive motor 13 via a drive belt 12. It is configured to be. A polishing plate 51 is fixed to the lower rotary shaft 11,
The upper surface of the polishing plate 51 serves as a polishing surface for polishing the lens 53.

The lens 53 is attached and fixed on the lower surface of the lens holder 52 using a pitch or the like. The upper portion of the lens holder 52 is rotatably fitted to a spherical portion formed at the tip of the swing shaft member 54. The upper portion of the swing shaft member 54 is attached and fixed to the swing arm 55. The swing arm 55 is rotatably connected to a drive unit 57 about a rotary shaft 56, and is structured so that a predetermined polishing pressure can be applied downward in the drawing by an air cylinder 58. In the above upper shaft structure, the rocking shaft member 54 reciprocally rocks or swivels by the rocking motion of the drive unit 57, and accordingly the lens holder 52 also rocks on the polishing plate 51. Has become.

The shaft support of the lower rotary shaft 11 and the drive system of the lower rotary shaft 11 are fixed to the rotary frame 15. The rotating frame 15 is rotatably attached to the pair of horizontal moving bases 16 at both left and right ends. Each of the pair of horizontal movement bases 16 is attached to a horizontal movement frame 17, and the horizontal movement frame 17 is slidably attached to a horizontal movement guide 18 having a pair of upper and lower guide shafts extending in the front-rear direction. The horizontal movement guide 18 is fixed to the vertical movement base 19. Vertical movement base 19
Is attached to the vertical movement guide 22 so as to be vertically slidable.

The pair of left and right horizontal movement guides 18 are male screws 23 formed on the outer peripheral surfaces of the tips of the pair of horizontal movement shafts 23.
a and the horizontal moving shaft 23 on the left side shown in FIG.
Is rotated by the handle 24. A sprocket 27 is fixed to the left horizontal moving shaft 23, and the right horizontal moving shaft 23 is also configured to rotate via a transmission chain 29 installed between the sprocket 27 and a sprocket 28 similar to the sprocket 27. There is. Horizontal movement axis 2 on the left
The rotation amount of 3 can be measured by the digital counter 25.

Male screws 31a formed on the upper part of a pair of vertical driven shafts 31 provided on the left and right sides are screwed onto the pair of vertical moving bases 19 on the left and right. A driven bevel gear 32 is fixed to an intermediate height position of the upper and lower driven shafts 31 on the right side shown in FIG. 2, and the driven bevel gear 32 is fixed to a vertical drive shaft 33 as a driven bevel gear 34. Meshes with. This right and left vertical drive shaft 33 can be rotated by a handle 35, and the rotation thereof can be performed by the digital counter 3
It can be measured by 6. When the right vertical drive shaft 33 rotates, the right vertical drive shaft 3 shown in FIG.
1 rotates, and a left and right upper and lower sides are provided via a transmission chain 39 that is installed between a sprocket 37 fixed to the lower end of the upper and lower driven shafts 31 and a sprocket 38 fixed to the lower end of the left and right driven shafts 31. The driven shaft 31 is driven to rotate.

An extension frame portion 41 is fixed to the lower portion of the rotating frame 15, and a nut member 42 is rotatably attached to the lower end of the extension frame portion 41. The tilt drive shaft 43 is connected to the tilt adjusting shaft 45 via a universal joint 44 that is configured to be bendable. A male screw 45a is formed on the outer circumference of the tilt adjusting shaft 45, and the male screw 45a is screwed into the nut member 42. The tilt drive shaft 43 is configured to be rotationally driven by the handle 46,
The amount of rotation is measured by the digital counter 47. The tilt drive shaft 43 is axially supported by a support frame 48 fixed to the horizontal movement base 16 or the horizontal movement frame 17 via a fixture or the like.

The digital counters 25, 36,
47 is configured such that the measured value of the counter increases or decreases in accordance with the forward and reverse rotation amounts of the horizontal drive shaft 23, the vertical drive shaft 33, and the tilt drive shaft 43, and the measured value is the front and rear position of the rotating frame 15. , The vertical position and the tilt angle are shown as absolute values. As this digital counter, various ones having a detection method and a counting method of electric type or mechanical type can be used, but from the viewpoint of reliability and cost, both the detection method and the counting method are mechanical type. Is preferred.

Next, the operation of the polishing apparatus described above will be described. In this polishing apparatus, as shown in FIG. 1, when the tilt drive shaft 43 is rotated by rotating the handle 46, the tilt adjusting shaft 4 is rotated through the universal joint 44.
5 also rotates, so that the nut member 42 moves the tilt adjusting shaft 4
5 is moved in the axial direction as indicated by the chain double-dashed line in FIG. 1, and as a result, the tilt center axis S, which is the rotation axis between the rotation frame 15 and the horizontal movement base 16, is rotated. The moving frame 15 rotates. By the rotation of the rotation frame 15, the lower rotation shaft 11 has an inclination angle according to the rotation amount.

When the pair of horizontal drive shafts 23 is rotated by rotating the handle 24, the horizontal moving frame 1
Since 7 moves in the front-rear direction along the two guide shafts of the horizontal movement guide 18 together with the horizontal movement base 16 and the rotating frame 15, the lower rotation shaft 11 moves in the front-rear direction with a movement amount according to the rotation amount. Will be moved to.

Further, when the vertical drive shaft 33 rotates by rotating the handle 35, the pair of vertical driven shafts 31 rotates and the vertical moving base 19 moves the horizontal moving frame 17,
Since it moves up and down together with the horizontal movement base 16 and the rotating frame 15, the lower rotation shaft 11 moves up and down with a movement amount according to the rotation amount.

In the present embodiment configured as described above,
As shown in FIG. 3A, when the lower rotation shaft 11 is tilted about the tilt center axis S by a predetermined tilt angle θ,
As shown in FIG. 3B, the horizontal movement amount x in the front-rear direction X,
By moving the lower rotary shaft 11 and moving the lower rotary shaft 11 in the vertical direction Z by the vertical movement amount z as shown in FIG. 3C, the position of the swing shaft member 54 is not changed at all. The position of the lens holder 52 can be aligned with the lens (material to be polished) 53 on the polishing plate 51.

In this case, the tilting motion of the lower rotary shaft 11 is X
-In the Z plane (in the case of the present embodiment, a vertical plane, that is, a plane parallel to the plane of the paper of FIGS. 1 and 3; this plane corresponds to the above-mentioned modified plane), and by this tilting operation, The positions of the swing shaft member 54 and the lens holder 52 attached to the upper shaft structure (the swing arm 55 etc.) and the positions of the polishing plate 51 and the lens 53 attached to the lower shaft (the lower rotary shaft 11 etc.) , Are mutually displaced in the XZ plane. On the other hand, as described above, the lower rotation shaft 11 is configured to be independently movable in both the X direction (horizontal front-back direction) and the Z direction (vertical vertical direction), It can be moved to any position in the XZ plane. Therefore, the lower shaft structure of the present embodiment can always be aligned with the upper shaft structure even when the inclination angle θ is set to an arbitrary value by the mechanism described above. This means that the length of the swing shaft member, the thickness of the lens holder, the lens, the polishing plate, the length of the lower rotation shaft, or the like is changed to change the distance between the polishing position and the tilted central axis S. The same applies to the case where they are changed, and the upper axis and the lower axis can always be matched with each other in response to these changes.

Further, in this embodiment, the tilt angle θ, the horizontal movement amount x and the vertical movement amount z can be accurately and immediately grasped by the digital counters 25, 36 and 47, respectively. Therefore, a predetermined adjustment state can be obtained reliably and easily with good reproducibility. Therefore, even if each setting value is obtained in advance, even a beginner can easily perform the adjustment without requiring skill in the adjustment work. be able to. Particularly, since it is only necessary to set the value to a preset value by the digital counter, the ambiguity of the setting can be reduced as compared with the case where the analog setting is performed, so that it is possible to perform the adjustment work with higher accuracy. Since the digital counter of the present embodiment has a mechanical detection structure and a mechanical counter, there is an advantage that setting backup is unnecessary and reliable operation can be obtained.

In this embodiment, since it is not necessary to adjust the mounting portion between the swing arm and the swing shaft member on the upper shaft, there is no need to tamper with the mounting portion to which the polishing liquid is likely to adhere, There is no work done by
Adjustment accuracy and reproducibility are improved. Moreover, the adjustment work can be performed very easily. Further, since it is not necessary to provide a structure for adjustment on the above-mentioned mounting portion, the rigidity of the swinging mechanism can be increased without increasing the weight, so that the polishing pressure can be reduced and the polishing accuracy can be reduced. Can also be increased.

FIG. 4 shows an attachment structure of the polishing cover used in this embodiment. Normally, the polishing cover is for covering the periphery of the polishing processing portion, that is, the portion where the polishing plate 51, the lens holder 52 and the lens 53 are arranged, so that the slurry liquid containing abrasive grains does not scatter around. .
In this embodiment, an upper cover 62 made of a stainless steel plate or the like engaged with the frame 10 and a lower cover 67 made of a stainless steel plate or the like fixed to the pivotal support structure of the lower rotary shaft 11 and the rotating frame 15. A closing cover 68 made of a transparent material such as an acrylic plate is detachably attached so as to close the upper opening of the frame. The closing cover 68 is formed with an opening 68a configured to allow an unillustrated swing shaft member (hairpin) to pass through in the swing range without trouble.

The upper cover 62 is formed in a flat frame shape so as to surround the above-mentioned polishing processing portion, and is engaged between the opening edge of the frame 10 and the guide rail 61 attached to the lower surface of this opening edge. It has a pair of left and right side edge portions 62a and is configured to be slidable in the direction of the drawing sheet. A connection tool 64 is attached to the upper cover 62.
Is attached to the linear slider 65. The linear slider 65 is fitted to a linear rail 66 attached to the horizontal movement base 16, and is attached to the linear rail 66 slidably in the vertical direction. Therefore, the upper cover 62 maintains its vertical position,
The horizontal movement base 16 is configured to integrally move forward and backward as the horizontal moving base 16 moves forward and backward. A flexible sheet 63 made of synthetic rubber or the like is attached to the lower end of the upper cover 62 so as to surround the lower rotary shaft 11.

The lower cover 67 is formed in a box shape without a lid so as to cover the polished portion from below. The lower cover 67 has a through hole 67 through which a shaft supporting structure for supporting the lower rotating shaft 11 passes.
a is formed, and the lower cover 67 is fixed to the rotating frame 15 arranged below the lower cover 67. Therefore, the lower cover 67 is configured to integrally move up and down as the rotating frame 15 moves up and down, and integrally tilt as the rotating frame 15 tilts.

As described above, the upper cover 62 moves together with the horizontal moving base 16 in the front-back direction, but the positional relationship with the upper cover 62 changes due to the raising and lowering operation and the tilting operation of the lower cover 67, and in some places the upper cover 62. A gap may be formed between 62 and the lower cover 67.
In that case, the flexible sheet 63 extends between the upper cover 62 and the lower cover 67 to ensure the sealing property (coverability) of the polished portion. In the present embodiment, the flexible sheet 63 is attached to the upper cover 62 and hangs downward as it is, but the lower end portion of the flexible sheet 63 is at the lower cover 67 (preferably the upper end portion thereof). Alternatively, the flexible sheet 63 may completely seal the space between the upper cover 62 and the lower cover 67. At this time, the flexible sheet 63 is attached to both the upper cover 62 and the lower cover 67 with some margin.

The polishing apparatus of the present invention is not limited to the above-mentioned illustrated examples, and it goes without saying that various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the lower shaft is moved in the horizontal direction (front-back direction) and the vertical direction (up-down direction), but the lower shaft can be arbitrarily positioned in the plane where the inclination angle changes. Moreover, it is only necessary that the two movement directions intersect each other in the plane. Further, in the above-described embodiment, the upper shaft structure has a structure in which an oscillating shaft member called a kanzashi and a lens holder are freely angled. However, for example, the upper shaft structure performs a spherical core movement suitable for a lens surface. It can be one.

Further, as the invention described in the present specification, the first polishing member, the swinging member connected to the first polishing member, and the material to be polished with respect to the first polishing member are provided. For polishing the material to be polished, which has a second polishing member facing each other, a swing drive means for swinging the swing member, and a rotation drive means for rotating the second polishing member around its axis. A polishing device, comprising: tilt adjusting means capable of changing a tilt angle of a rotation axis of the second polishing member with respect to the swinging member; and moving means capable of moving a position of the second polishing jig. There is a feature in that an angle detecting means for detecting an inclination angle by the inclination adjusting means and a position detecting means for detecting a moving position by the moving means are provided. In this case, the angle detecting means and the position detecting means are preferably digital counters.

[0042]

As described above, according to the present invention,
Since the mechanism on the rocking side can be configured simply and the rigidity can be increased without increasing the weight, the polishing pressure can be controlled easily and the positioning accuracy of the polishing member can be improved, thus improving the polishing accuracy. Can be made.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a structure of an embodiment of a polishing device according to the present invention as seen from a right side surface.

FIG. 2 is a vertical cross-sectional view of the structure of the same embodiment as seen from the front.

FIG. 3 is explanatory diagrams (a) to (c) showing a procedure of an adjustment work in the same embodiment.

FIG. 4 is a partial vertical cross-sectional view showing a structure for attaching a polishing cover in the same embodiment.

[Explanation of symbols]

10 frames 11 Lower rotation axis 15 rotating frame 16 Horizontal movement base 17 Horizontal movement frame 18 Horizontal movement guide 19 Vertical movement base 22 Vertical movement guide 23 Horizontal drive shaft 25,36,47 Digital Counter 33 Vertical drive shaft 43 Tilt drive shaft 62 Top cover 63 Flexible sheet 67 Lower cover

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3C049 AA04 AA11 AA16 AC02 CA01                       CB01 CB04                 3C058 AA07 AA11 AA16 AA18 CA01                       CA06 CB04 CB07 DA02 DA10

Claims (4)

[Claims] 1. A first polishing member, a swinging member connected to the first polishing member, a second polishing member that faces the first polishing member with a material to be polished, and the swinging member. A polishing device for polishing the material to be polished, comprising: a swing drive means for swinging the member; and a rotation drive means for rotating the second polishing member around its axis. Adjustment means for changing the tilt angle of the rotation axis of the second polishing jig with respect to the swing member, and first moving means for moving the position of the second polishing jig in the first direction along the change surface of the tilt angle. And a second moving means that allows the position of the second polishing member to move in a second direction along the changing surface while intersecting the first direction. 2. The tilt adjusting means according to claim 1,
Polishing, characterized in that detection means for detecting the tilt angle set by the first moving means and the second moving means and the position of the second polishing member in the first direction and the second direction is provided. apparatus. 3. The detector according to claim 2, wherein the detecting means is a digital counter directly or indirectly attached to the drive shafts of the tilt adjusting means, the first moving means and the second moving means. And polishing equipment. 4. The rotating frame according to any one of claims 1 to 3, wherein the second polishing member is axially supported by a rotating frame configured to be rotatable by the inclination adjusting means. Is rotatably attached to a primary moving base movable by one of the first moving means and the second moving means, and the primary moving base is attached by the other of the first moving means and the second moving means. A polishing apparatus attached to a movable secondary movement base, wherein the inclination adjusting means is configured to set an inclination angle of the rotating frame with reference to the primary movement base.