JPS625881Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a lens holding device in a lens polishing machine.

As shown in FIG. 1, a conventional lens holding device of this type has a hollow main shaft 1 connected to the tip of a swinging arm (not shown), which swings therethrough, with the tip of the hollow main shaft 1 communicating with the hollow part. A ball body 3 having a through hole 2 is fixed thereto, and a lens holder 5 is screwed to the outside of the ball body 3 via an intermediate member 4 which can freely rotate while slidingly contacting the ball body 3. This lens holder 5 has a flange portion 6 on the outside and a through hole 7 in the center.
Further, a mounting seat 9 for a lens a is fixed to the lower surface of the lens holder 5, and has a through hole 8 in the center that communicates with the through holes 2 and 7.
The operation of attaching and detaching the lens a is performed by air passing through the through holes 2, 7, and 8. Therefore, conventional lens holding devices have drawbacks that are complex in structure, difficult to assemble, consume extra time, and increase product cost.

In view of the deficiencies of the conventional devices, this invention aims to provide a lens holding device for a lens polishing machine that has a simple structure, has high machining accuracy for lenses, and is capable of accurate polishing.

An embodiment of this invention will be described below based on the drawings.

Reference numeral 10 denotes a swinging arm, the base of which is connected to a drive device (not shown) so that it can swing in the horizontal direction. At the tip of this swing arm 10,
A vertical hollow main shaft 12 with a tapered part 11 formed on the inner edge of the lower end is fitted so as to be able to rise and fall freely, and an inverted conical pivot part 13 and a circular flange part 14 are located at the axial center of the main shaft 12 at the lower end. A pivot shaft 15 having a pivot shaft 15 is inserted therethrough. Further, at the upper end of the main shaft 12, a cover body 17 is provided with a through hole 16 in the center.
A first cylinder 18 is vertically fixed to the upper end of the central portion of the cover body 17 so as to be electrically connected to the through hole 16. A piston rod 20 to which a piston 19 is fixed is inserted into the cylinder 18, and the lower end of the piston rod 20 is inserted into the main shaft 12 through the through hole 16 of the cover body 17 and connected to the upper end of the pivot shaft 15. . 2
Reference numerals 1 and 22 are air pipes, and the piston 19 in the cylinder 18 is moved up and down by air sent out from the air pipes. In addition, a through hole 23 is provided on the base side of the lower end of the cover body 17 of the main shaft 12.
The tip of an elevating plate 24 having a hole therein is inserted and fixed. This elevating plate 24 can freely adjust the vertical position of the main shaft 12, and the through hole 2 is formed on the upper surface of the base of the elevating plate 24.
A second cylinder 25 in communication with 3 is vertically fixed. A piston rod 27 to which a piston 26 is fixed is inserted into the cylinder 25, and the lower end of the piston rod 27 extends through the through hole 23 of the elevating plate 24 and is inserted and fixed into the swing arm 10. Reference numerals 28 and 29 are air pipes which act to raise and lower the piston 26 inside the cylinder 25 which is sent out from the air pipes, but since the piston rod 27 to which the piston 26 is fixed is fixed to the swing arm 10, neither the cylinder 25 nor the piston 25 can be raised or lowered. The plate 24 moves up and down to adjust the vertical position of the main shaft 12.

On the other hand, a bearing body 31 is fitted into the lower end of the pivot shaft 15 via an engaging member 30 with which the flange portion 14 is freely engaged. A recess 32 is formed on the upper surface of this bearing body 31.
The engaging member 30 is screwed into the recess 32, and the flange portion 14 at the lower end of the pivot shaft 15 is freely fitted into the space 33 formed by the engaging member 30 and the bearing body 31. . At the center of the recess 32 of the bearing body 31 is a conical bearing surface 34 against which the pivot portion 13 at the lower end of the pivot shaft 15 comes into contact.
A tapered hole 35 is formed at the center of the lower surface of the bearing body 31, and a tapered portion 36 is formed at the outer edge of the upper end of the bearing body 31 to fit into the tapered portion 11 at the lower end of the main shaft 12. is formed. 3
Reference numeral 7 denotes a lens holder for holding the lens a, and 38 is a polishing plate, with a truncated conical protrusion at the center of the upper surface of the lens holder 37 that is removably fitted into the tapered hole 35 on the lower surface of the bearing body 31. 39 is formed.

Next, the operation of this invention will be explained.

First, when polishing the lens a in the state shown in FIG.
is fixed to the swinging arm 10, so the elevating plate 24
is lowered, and along with this, the main shaft 12 is also lowered to a predetermined position. Next, by sealing air into the first cylinder 18 from the other air pipe 21, the piston 19 is pushed down, and the pivot shaft 15 is pushed down.
is lowered, and the bearing body 31 loosely fitted to its lower end also lowers. At this time, since the lens holder 37 holding the lens a is placed on the top surface of the polishing plate 38, the tapered hole 35 on the lower surface of the bearing body 31 fits into the protrusion 39 of the lens holder 37, and the 2
As shown in the figure, the lens holder 37 is attached to the bearing body 31.
It is pressed onto the polishing plate 38 by means of the polishing plate 38. Here, the polishing plate 38 is rotated and the swing arm 10 is also swinged, but at this time, the bearing body 31
is loosely fitted to the lower end of the pivot shaft 15, and the lens holder 37 is integrated with the bearing body 31 so that it can freely rotate. It is something that is polished. During this polishing operation, the lens a is always held at the center of the polishing plate 38 by the pivot portion 13 at the lower end of the pivot shaft 15, so that the entire lens a is uniformly polished.

When a predetermined polishing time has elapsed, the operation of the polishing plate 38 and the swing arm 10 is stopped, and at the same time, air is sealed in the first cylinder 18 from the air pipe 22 to push up the piston 19. 15 rises, and the tapered hole 35 of the bearing body 31 at its lower end is disengaged from the protrusion 39 of the lens holder 37 and rises, and its tapered part 36 is fitted and fixed to the tapered part 11 at the lower end of the main shaft 12. Here, the lens a is removed from the lens holder 37, replaced with a new lens to be processed, and the above-described operations can be repeated.

As described above, this idea consists of a hollow main shaft that is vertically supported by a swinging arm in a vertically adjustable manner and has a tapered part formed on the inner edge of the lower end, and a hollow main shaft that is inserted into the main shaft and can freely move up and down with respect to the main shaft. A pivot shaft is supported by the pivot shaft and has a pivot portion and a flange portion at its lower end, a conical bearing surface that is loosely fitted to the lower end of the pivot shaft and where the pivot portion comes into contact with the center of the upper surface, and a tapered center of the lower surface. A bearing body having a hole formed therein and a tapered part that fits into the tapered part of the main shaft on the outer edge of the upper end, and a truncated conical projection at the center of the upper surface that fits into the tapered hole on the lower surface of the bearing body. The lens holder is characterized in that it includes a lens holder having a portion formed thereon.

Since this device is constructed as described above, the structure is simple, and during polishing, the center of the lens is always pressed against the polishing plate by the pivot shaft, resulting in high processing accuracy. Polishing is possible. On the other hand, when not polishing, the tapered part of the bearing body is fitted and fixed to the tapered part of the lower end of the main shaft, so the axis of the main shaft and bearing body are aligned and the lens waits for the next lens polishing operation. The bearing body and the lens holder are reliably fitted, and as a result, the pressure of the pivot shaft is transmitted to the center of the lens on the lower surface of the lens holder, and the above-mentioned accurate holding ability is exhibited.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of a conventional product, FIG. 2 is a cross-sectional view of the lens holding device of the lens polishing machine according to the present invention during lens polishing, and FIG. 3 is a cross-sectional view of the same while the lens is not being polished. 10... Swing arm, 11, 36... Taper part, 12... Main shaft, 13... Pivot part, 14...
...Flange part, 15 ... Pivot shaft, 31 ... Bearing body, 34 ... Bearing surface, 35 ... Tapered hole, 37
...Lens holder, 39...Protrusion.

Claims (1)

[Scope of utility model registration request] A hollow main shaft 12 is supported vertically on the swing arm 10 so as to be vertically adjustable and has a tapered part 11 formed on the inner edge of the lower end; A pivot shaft 15 is formed with a pivot portion 13 and a flange portion 14 at its lower end, a conical bearing surface 34 where the pivot portion 13 comes into contact with the center of a recess 32 on the upper surface, and a tapered hole 35 formed in the center of the lower surface. At the same time, there is a tapered portion 11 of the main shaft 12 on the outer edge of the upper end.
It consists of a bearing body 31 formed with a tapered part 36 that fits into the bearing body 31, and an engagement member 30 screwed into the recess 32 of this bearing body 31, and is formed by the bearing body 31 and the engagement member 30. The flange portion 14 at the lower end of the pivot shaft 15 was freely fitted into the space 33, and a truncated conical protrusion 39 formed at the center of the upper surface of the lens holder 37 was fitted into the tapered hole 35 on the lower surface of the bearing body 31. A lens holding device for a lens polishing machine, characterized in that: