JPS62120966A - Lens transport mechanism of automatic grinding device - Google Patents

Abstract

PURPOSE:To increase the speed of demounting by pushing up with a built-in lift piston when each lens on a grinding plate is to be attracted, and thereby separating lens easily and safely even for grinding a lens of particular form and by attracting the lens to a grinding holder. CONSTITUTION:When grinding of each lens L is completed, a decorated hairpin type piece is raised, and a vacuum pad 24 is sunk on and pressed to the oversurface of a grinding holder 21, followed by actuation of a vacuum pump B. The lens L on a grinding tray 8 is attracted by said grinding holder 21 and further by the vacuum pad 24. At the same time, an air compressor A is actuated to feed air into a draft hole 2 in spindle 1 to cause actuation of a piston 12, and now a lens lifting rod 13 pushes up the lens L on then grinding tray 8. According to this arrangement, lens L can be separated perfectly and transported while attracted to the grinding holder 21 safely and surely. This can also increase the speed of demounting significantly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lens polishing apparatus, and particularly to a lens conveyance mechanism in an automatic lens polishing apparatus.

Prior Art In order to supply and remove lenses in conventional automatic lens polishing equipment, a disk-shaped or cylindrical jig is adhered to the back surface of the lens, the lens is picked up by an air chuck, and the lens is transported to a polishing plate. However, in recent years, lenses have become smaller and lighter, making operations during each step of pasting, peeling, and cleaning complicated and difficult, resulting in 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 bulb 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 and remove the lens from the polishing plate: (1) Picking up the outer peripheral surface of the lens using an air chuck, etc. as in the past, and (2) Using a vacuum chuck. It can be roughly divided into two methods: a method in which the lens is attracted and transported. The former transport method has drawbacks such as a complicated mechanism and high equipment costs, and also requires a dedicated chuck part depending on the shape of the lens, requiring a lot of time and effort during operation. In addition, the latter method of transport involves pressing a suction bat for lens suction against the lens surface, and using air from a vacuum pump to adsorb the lens to the suction bat and transporting the lens, so the mechanism is simple and moreover. Not only can it be an inexpensive device, but it is also easy to handle and operate in a short time and with less effort. However, on the other hand, if a problem occurs in the suction of the suction bat, the lens remains on the polishing plate, making automatic conveyance impossible.

Problems to be Solved by the Invention The problems to be solved by the present invention are 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 prevent the lens from remaining on the polishing plate. The aim is to ensure safe and reliable removal.

Means for Solving the Problems The present invention was developed to solve the above problems, and includes a spindle with a ventilation hole in the center, and an air compressor installed at the lower end of the spindle. A fixed holder with an air joint holder screwed onto it, a movable holder with a polishing plate with a guide hole drilled in its center fixed to the holder, and a diaphragm attached to the lower end of the lens push-up rod formed into a T-shape. and a piston attached thereto, the piston is mounted between a fixed holder and a movable holder to connect both holders together, and the piston is actuated via air to push up the lens on the polishing plate to the polishing holder. This allows the lens on the polishing dish to 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: (1) When the polishing holder adsorbs the lens on the polishing plate, the lens on the polishing plate is pushed up so that the lens can be sucked safely and reliably; (2) The polishing plate In order to push up the upper lens, a lifting piston is installed inside the polishing plate, and air from an air compressor is used as the means for operating the piston.

Embodiments and their functions FIG. 1 shows the lens conveyance mechanism in the automatic lens polishing apparatus of the present invention. (A) shows the lens being polished, and (B) shows the lens being removed from the polishing plate. 0 In the figure, 1 is the spindle of the polishing device, and ventilation holes 2 are provided in the vertical direction of the center core.
The upper end is screwed to a fixed holder 6, and the lower end is screwed to a rotary joint via a bearing 4. An air joint 5 for an air compressor (A) is attached to the rotary joint 3 so that air from the air compressor (A) is blown to 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, which is provided with a guide hole 9, and is fixed to the polishing plate 8 with a set screw 10.10, and is further connected to the fixed holder 6 with a set screw 11.11. . A diaphragm 14 is attached to the fixed holder 6 with a nut 15, and is expanded upward by air blowing from the ventilation hole 2 of the spindle l. The piston 12 is a lens push-up rod 13 formed into a rod-like T-shape.
is installed between the movable holder 7 and the fixed holder 6 with a compression spring 16. Reference numeral 21 denotes a polishing holder provided with a ventilation hole 22, and a candela 23 pressurizes the lens (L) on the polishing plate 8 to polish it. 2
Reference numeral 4 denotes a vacuum bat attached to the tip of the air joint 25, so that the polishing holder 21 can be sucked and transported together with the lens (L) using a vacuum pump (B). The method of suctioning the lens (L) on the polishing plate 8 to the polishing holder 21 via the vacuum hat 24 is the same as the conventional method.

Next, the operation of the lens conveyance mechanism according to 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 l, so the piston 12 does not operate and the lens The push-up rod 13 is always fixed in the direction of the fixed holder 6 (downward) by the compression spring 1G.
are being oppressed. Therefore, when the lens push-up rod 13 is inserted into the guide hole 9 of the polisher 8, the movable holder 7
and the fixed holder 6. In other words, when the piston 12 does not operate, the lens (L) is pressurized between the polishing holder 21 and the polisher 8 via the lever 23 as in the conventional polishing method, and the polisher 8 is rotated and shaken by the spindle 1. The lens (L) is then polished. Next, after the lens (L) is polished as shown in the figure (A), the ring 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 pad 24 with 5 is pressed down to operate the vacuum pump (B). Then, the lens (L) on the polisher 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, and air is blown into the ventilation hole 2 of the spindle l to operate the piston 12. Then, the lens (L) on the polisher 8 is pushed up by the lens push-up rod 13 through the guide hole 9 in the polisher 8, as shown in FIG. By this pushing up, the lens (L) can be completely peeled off from the polisher 8, so that the lens (L) on the polisher 8 can be safely and reliably attracted to the polishing holder 21 and transported.

Effects of the Invention Since the present invention is configured as described above, it is possible to
Even when polishing lenses with special shapes that were considered impossible, the lens can be easily and safely peeled off from the polishing dish and adsorbed onto the polishing holder. Moreover, the peeling speed can be greatly improved, and the structure itself is simple. Therefore, equipment costs are low, and since it is easy to operate, it is a lens transport mechanism in an automatic lens polishing machine that is excellent not only in terms of performance but also in terms of operation, handling, economics, and practicality. I can say it.

[Brief explanation of drawings]

Figure 1 shows an overview of the lens transport mechanism in the automatic lens polishing device of the present invention, and (a) shows the state in which the lens is being polished, and (b) shows the state in which the lens is being transported. It is a schematic diagram of the mechanism. 1... Spindle 2, 22...
Ventilation hole 3... Rotary joint 4... Bearing 5.25... Air joint 6... Fixed holder 7... Movable holder 8・・・・・・Kensho plate 9・・・・・・
Guidance holes 10, 11... Set screws 12...
... Piston 13 ... Lens push-up rod 14 ... Diaphragm 15 ... Nut 16 ... Compression spring 21 ... Polishing holder 23. ...Kanzaku 24 ...Vacuum pad (A) ...Air compressor (B) ...
・・Vacuum pump (L) ・・・Lens

Claims (1)

[Scope of Claims] A spindle with a ventilation hole bored in the center core is provided, a rotary joint equipped with an air joint for an air compressor is screwed to the lower end of the spindle, and a holder is screwed to the upper end of the spindle. A fixed holder, a movable holder in which a polishing plate with a guide hole bored in the center core is fixed to the holder, and a piston in which a diaphragm is attached to the lower end surface of a lens push-up rod formed in a rod-like T-shape are provided. An automatic lens polishing device characterized in that a piston is loaded between a fixed holder and a movable holder to connect both holders, and the piston is actuated via air to push up the lens on a polishing plate onto the polishing holder. Lens transport mechanism.