JPH0234745B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lens conveyance mechanism in an automatic lens polishing apparatus.

[Conventional technology]

In conventional automatic lens polishing equipment, lenses are fed and removed by a lens transport mechanism by attaching a disc-shaped or cylindrical jig to the back surface of the lens, picking it up with an air chuck, etc., and transporting it to a polishing plate. However, as lenses have recently become smaller and lighter, operations during each process such as pasting, peeling, and cleaning have become complicated and difficult, causing various problems in terms of quality and cost of lens polishing. Therefore,
In order to solve these problems, a device has been developed that polishes the lens as a single ball without attaching it to a jig. However, although it is fine if the shape of the lens is constant, automatic conveyance becomes difficult or impossible if the shape of the lens is of various types and shapes.

Currently, in automatic polishing equipment using single bulbs, there are two ways to feed the lens to and remove it from the polishing dish: the conventional method of picking up the outer peripheral surface of the lens with an air chuck, etc., and transporting it, and the method of suctioning the lens with a vacuum chuck. It can be roughly divided into two methods: The former conveyance method has drawbacks such as a complicated mechanism and high equipment costs, and also requires a dedicated chuck portion depending on the shape of the lens, requiring much time and effort during operation. The latter transport method involves pressing a suction pad for lens suction against the lens surface and using air from a vacuum pump to adsorb the lens to the suction pad, so the mechanism is simple. Not only can the device be inexpensive, but it is also easy to handle and can be operated in a short time and with less effort. However, on the other hand, if a problem occurs in the suction of the suction pad, the lens remains on the polishing plate, making automatic conveyance impossible.

[Problem that the invention seeks to solve]

The problem to be solved by the present invention is to prevent the lens from remaining on the polishing plate, which is a drawback of the conventional vacuum suction method as described above, and to ensure that the lens on the polishing plate can be peeled off safely and reliably. It's there.

[Means for solving problems]

The present invention was developed in order to solve the above-mentioned problems, and is a rotary joint that has an air joint for connecting an air compressor at the lower end of a spindle with a ventilation hole in the center core. and screwing a fixed holder to the upper end of the spindle, fixing a polishing plate having a guide hole in the center part to the movable holder, and connecting the movable holder and the fixed holder in series; A piston with a diaphragm attached to the lower end surface of a lens push-up rod formed in a T-shape is provided between the movable holder and the fixed holder, and the piston is attached to and detached from the upper surface of the polishing holder provided with a ventilation hole, and is connected to a vacuum pump. A vacuum part equipped with an air joint for the purpose of the present invention is provided, and by sending air, the piston is actuated via the diaphragm to push up the lens on the polishing plate toward the polishing holder, and by sucking air, the piston is actuated via the diaphragm. By adsorbing the lens on the polishing holder with the vacuum pad, the lens on the polishing plate can be safely and reliably peeled off and adsorbed onto the polishing holder. That is, the means for solving the problems of the present invention are as follows:
When the vacuum part adsorbs the lens on the polishing plate through the polishing holder, it pushes up the lens on the polishing plate so that the lens can be adsorbed safely and reliably. These include installing a piston for pushing up inside the dish, and using air from an air compressor as a means of operating the piston.

[Examples and their effects]

Fig. 1 shows the lens conveyance mechanism in the automatic lens polishing device of the present invention, and Fig. 1 shows the lens being polished, and Fig. 1 shows the lens being peeled off from the polishing plate and transferred to the polishing holder via the vacuum part. Each figure shows the state in which the lens is conveyed while being attracted to the lens. In the figure, 1 is a spindle of an automatic lens polishing device, and a vertical ventilation hole 2 is bored in the center of the spindle 1.
The upper end of the spindle 1 is screwed to a fixed holder 6, and the lower end is screwed to a rotary joint 3 via a bearing 4. An air joint 5 for connecting the air compressor A is attached to the rotary joint 3, and air from the air compressor A is blown into the fixed holder 6 through the ventilation hole 2 of the spindle 1. . Reference numeral 7 designates a movable holder for the polishing plate 8 in which a guide hole 9 is bored, and the polishing plate 8 is fixed with set screws 10, 10, and is further connected to the fixed holder 6 with set screws 11, 11. There is. 14 is Natsu 15
This is a diaphragm attached to the fixed holder 6 at the holder 6, and is configured to expand upward when air is blown from the ventilation hole 2 of the spindle 1. piston 1
2 is integrally formed with a lens push-up rod 13 whose tip end is shaped like a rod and T-shaped, and is housed between the movable holder 7 and the fixed holder 6. A compression spring 16 is interposed between the movable holder 7 and the piston 12. 2
Reference numeral 1 denotes a polishing holder in which a ventilation hole 22 is formed, and the lens L on the polishing plate 8 is pressurized by a kanzashi 23 to polish it. Reference numeral 24 denotes a vacuum pad attached to the tip of the air joint 25, so that the polishing holder 21 and the lens L can be sucked and transported by a vacuum pump B. The method of adsorbing the lens L on the polishing plate 8 to the polishing holder 21 via the vacuum pad 24 is the same as the conventional method.

Next, the operation of the lens conveyance mechanism in the automatic lens polishing apparatus of the present invention will be explained. First, when polishing the lens L, as shown in Figure A, the air from the air compressor A is not blown into the ventilation hole 2 of the spindle 1, so the piston 12
does not operate, and the lens push-up rod 13 is always fixed in the direction of the fixed holder 6 (downward) by the compression spring 16.
are being oppressed. Therefore, the lens push-up rod 1
3 is housed between the movable holder 7 and the fixed holder 6 while being inserted into the guide hole 9 of the polishing plate 8 . In other words, if the piston 12 does not operate,
As in the conventional polishing method, the lens L is pressurized between the polishing holder 21 and the polishing plate 8 via the lever 23, and the polishing plate 8 is rotated and swung by the spindle 1, so that the lens L is polished. . next,
After the lens L has been polished as shown in Figure A, the knife 23 is raised using an air cylinder (not shown), and the air joint 2 is attached to the top surface of the polishing holder 21.
The vacuum part 24 with 5 was pressed downward,
Activate vacuum pump B. Then, the lens L on the polishing plate 8 is attracted to the polishing holder 21 and further to the vacuum pad 24. At this time, the air compressor A that blows air to the rotary joint 3 is also operated at the same time to blow air into the ventilation hole 2 of the spindle 1 to operate the piston 12. By doing so, the lens L on the polishing plate 8 is pushed up by the lens push-up rod 13 through the guide hole 9 in the polishing plate 8, as shown in FIG.
By this pushing up, the lens L can be completely peeled off from the polishing plate 8, so that the lens L on the polishing plate 8 can be safely and reliably attracted to the polishing holder 21 and transported.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to easily and safely peel off the lens on the polishing plate and adsorb it to the polishing holder, even when polishing a lens of a special shape, which has conventionally been considered difficult or impossible. Moreover, the escape speed can be greatly improved, and the structure itself is simple, so the equipment cost is low, and the operation is simple, which improves not only performance, but also operational, handling, economical, and practical aspects. It can be said that it is an excellent lens conveyance mechanism in an automatic lens polishing device from all aspects including surface.

[Brief explanation of drawings]

Figure 1 shows an overview of the lens conveyance mechanism in the automatic lens polishing device of the present invention, and Figure 1 is a schematic view of the mechanism comparing the state in which the lens is being polished and the state in which the lens is being conveyed in Figure 1. be. 1...Spindle, 2, 22...Vent hole, 3...
...Rotary joint, 4...Bearing,
5, 25...Air joint, 6...Fixed holder,
7... Movable holder, 8... Polishing plate, 9... Guide hole, 10, 11... Set screw, 12... Piston, 13... Lens push-up bar, 14... Diaphragm, 15... Nut, 16... ...compression spring,
21...Polishing holder, 23...Kanzashi, 24
...Vacuum parts, A...Air compressor, B...Vacuum pump, L...Lens.

Claims (1)

[Claims] 1. Screw a rotary joint equipped with an air joint for connecting an air compressor to the lower end of a spindle with a ventilation hole in the center core, and screw a fixed holder to the upper end of the spindle. A polishing plate with a guide hole drilled in its core is fixed to a movable holder, the movable holder and the fixed holder are linked together, and a lens pusher formed in a rod-like T-shape is formed between the movable holder and the fixed holder. A piston with a diaphragm attached to the lower end surface of the rod is provided, and a vacuum part is provided that attaches and detaches to the upper surface of the polishing holder having a ventilation hole, and is equipped with an air joint for connecting to a vacuum pump. The automatic lens polishing is characterized in that the lens on the polishing plate is pushed up toward the polishing holder by operating the piston through the vacuum pad, and the lens on the polishing holder is suctioned by the vacuum putt by sucking air. Lens transport mechanism in the device.