JPS63127862A - Polishing head for lens polishing machine - Google Patents

Abstract

PURPOSE:To aim at automating the polishing of a lens, by pressing a lens holder against a polishing pan, rotatably and oscillatably by means of the forward end of a pressing pin during polishing, and by communicating a vacuum passage with a vacuum source, simultaneously with the elevation of a holder support part. CONSTITUTION:During polishing, a lens 1 is held to an oscillatable holder 3, and is pressed against a polishing pan 2 on rotation by means of the forward end 14 of a pressing pin 13, and therefore, the lens 1 is lapped while it rotates and revolves. After polishing, a holder support part 4 is raised so that the annular engaging flange 7 of the holder 3 is engaged with a holding cover 5 so as to sealingly close a hollow chamber 6, simultaneously the connection of a vacuum passage 12 with a vacuum source through a communication passage 11. Accordingly, a space 9 is evacuated to absorb and hold the lens 1 on the lens holder 3. Further, when the holder support part 4 is raised up to shift a predetermined height to the lens 1 onto a lens shift device, the absorption of the lens 1 is released. Thus, the polishing pan is arranged in the lower side and therefore polishing liquid may be applied to the lens 1 from above. Further, it is possible to automatically polish the lens as well as to automatically install and remove the lens 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a polishing head for a lens polishing machine, and is particularly suitable for use in a polishing head for an automatic lens polishing machine that automatically attaches and detaches lenses. .

In conventional technology lens polishing machines, generally, as shown in Fig. 4,
The lens 31 is placed on a bowl-shaped polishing plate 32 whose axis is inclined and which can be rotated around the inclined axis.
1 is held by a lens holder 33, and this lens holder 33 is supported by a pressure bottle 34 so as to be relatively rotatable and swingable, and pressure is applied toward the polishing plate 32, and the polishing plate 32 is held while applying polishing liquid. It is configured to perform co-sliding processing by rotating. Therefore, the position of the lens 31 on the polishing plate 32 after polishing is not constant, making it difficult to automatically attach or remove the lens I was going.

Problem to be Solved by the Invention, α As described above, it is not possible to automatically attach the lens 31 to the lens polishing machine, automatically remove it after processing, and automatically transport it to the next process. There was a problem that the automatic production line stopped at this point, making it impossible to improve productivity.

To solve this problem, as shown in Figure 5,
Place the polishing plate 32 on top and the lens holder 33 on the bottom,
It is conceivable to configure the lens holder 33 to be supported on the support member 35 by moving the pressurizing bottle 34 downward after polishing is completed. In this way, the position of the lens 31 is determined, so that automatic equipment such as a robot can be used. This makes it possible to attach and detach the lens 31. However, in this case, since the polishing liquid must be applied from the bottom to the top using the nozzle 36, the application of the polishing liquid becomes poor, resulting in problems in quality and productivity.

In view of the above-mentioned conventional problems, the present invention provides a polishing head for a lens polishing machine, in which a polishing plate can be placed below and polishing liquid can be applied from above, and the attachment and detachment of lenses can be automated. The purpose is to

Means for Solving the Problems In order to achieve the above object, the present invention provides a lens holder that holds a lens at the lower end of the holder support part so that it can be moved in and out, and when it is moved in and out, it can be displaced in the radial direction and it is not retracted. At times, the holder support parts are attached so that they are engaged with each other and cannot be displaced, and the holder support parts have protruding parts that are urged toward the lens holder and rotated relative to the axial center position of the lens holder. In addition, a pressurized bottle that can swing freely is installed,
A vacuum passage that can communicate with a vacuum source is formed in the holder support part, and a vacuum passage that communicates with the vacuum passage and that is formed between the lens holder and the lens when the lens holder is not retracted is formed in the lens holder. It is characterized by forming an open suction passage.

Function Since the present invention has the above configuration, when polishing a lens, the holder support part is lowered until the lens holder is retracted, and the lens holder is relatively freely rotatable and swingable at the tip protrusion of the pressure bottle. By applying pressure to the polishing plate with a pressure bottle while the lens is supported and rotating the polishing plate, the lens held by the lens holder can be rubbed and polished with the polishing plate. In addition, after polishing is completed, when the holder support is raised and the vacuum passage is communicated with the vacuum source, the lens holder protrudes to the non-retracted position due to the biasing force of the pressure bottle, and the holder support and the lens holder are engaged. , a suction passage of the lens holder communicates with the vacuum passage and the lens is attracted to the lens holder;
The lens is lifted as the holder support rises,
The receiver can be transferred to the lens transport means as appropriate.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3. 1 is a lens to be polished, and is placed on the top surface of a bowl-shaped polishing plate 2. be placed. The polishing plate 2
is arranged to be inclined with respect to the vertical axis, and is configured to be rotatably driven around the inclined axis. A lens holder 3 holds the lens and presses the lens 1 against the polishing plate 1, and is attached to the lower end of the holder support 4. A holding lid 5 is provided at the lower end of the holder support part 4.
A hollow chamber 6 is formed in the lens holder 3.
The upper part of the holding lid 5 passes through the bottom wall 5a of the hollow chamber 6.
An annular engagement collar 7 is provided that protrudes inward and radially outward from its upper end.

Furthermore, when the lens holder 3 is retracted, the lens holder 3
A gap is formed between the lens holder 3 and the bottom wall 5a of the holding lid 5 so that the lens holder 3 can swing. Furthermore, a sealing material 8 is attached to the inner surface of the bottom wall 5a of the holding lid 5 to maintain airtightness when the annular engagement collar 7 is engaged. The lens holder 3 is formed with a suction passage 10 that opens into the hollow chamber 6 at one end and opens into the space 9 formed between the lens 1 and the lens 1 at the other end. A vacuum passage 12 is formed that opens into the hollow chamber 6 and can communicate with a vacuum source (not shown) via a communication pipe 11. 1
Reference numeral 3 denotes a pressure bottle movably inserted into the axial center position of the holder support part 4, and a small-diameter tip protrusion 14 is protruded from the lower end of the pressure bottle, which is formed at the axial center position of the lens holder 3. It is fitted into the four parts 15, and is relatively rotatably and swingably engaged with a lees receiving metal 16 fitted to the bottom thereof. At the upper part of the pressure pin 13, as shown in FIG.
A piston 18 is provided which fits into the piston 7 . moreover,
At the upper end of the pressure pin 13, there is a nut 19 that engages with the upper end surface of the holder support 4 to regulate the amount of movement of the pressure pin 13.
are screwed together. A pressure fluid supply passage 20 is connected to the sill chamber 17 so as to urge the pressure pin 13 downward. Further, the holder support section 4 is attached to a lifting arm 21 that can be moved up and down.

In the above configuration, when polishing the lens 1, the lens 1 is held by the lens holder 3, and the lens holder 3 is retracted into the holding lid 5 side of the holder support part 4, as shown in FIG. It is pressed toward the polishing plate 2 by the protrusion 14 at the tip of the pressure pin 13 in a swingable state. In this state, as the polishing plate 2 is driven by oral transmission, the lens rotates and revolves relative to the polishing plate 2, and is ground and polished.

When polishing is completed, the pressure of the pressurized fluid in the shilling chamber 17 is higher than that during polishing, and the reaction force of the protruding urging force of the lens holder 3 causes the holder support part 4 to move up and down together with the lifting arm 21, and as a result, As shown in FIG. 2, the annular engagement collar 7 of the lens holder 3 engages with the bottom wall 5a of the holding lid 5, the lens holder 3 is fixed to the holder support 4, and the hollow chamber 6 is exposed to the outside. sealed against. on the other hand,
At the same time, the vacuum passage 12 is communicated with a vacuum source (not shown) via the communication pipe 11, the hollow chamber 6 is brought into a vacuum state, and the space 9 is brought into a vacuum state through the suction passage 10.
is held by suction on the lens holder 3. In this state, the elevating arm 21 rises to a predetermined height position, and then a lens receiver of a lens transfer device (not shown) is positioned below the lens holder 3.

Thereafter, by releasing the adsorption of the lens 1, the polished lens 1 is transferred to the lens receiver. Subsequently, after the unpolished lens supplied by the lens transfer device is sucked and held in the lens holder 3, the elevating arm 21 is lowered to bring the lens 1 into contact with the polishing plate 2, and then lowered further to move the lens holder 3. is retracted by a predetermined amount toward the holding lid 5 side of the holder support portion 4 against the urging force of the pressure pin 13.

As a result, the lens holder 3 is supported by the pressure pin 13 in a freely swinging state and is pressed toward the polishing plate 2. Also, the suction of the lens 1 is released. Thereafter, the lens is polished again by rotating the polishing plate 2.

The present invention is not limited to the above-mentioned embodiments, and for example, the specific mounting structure of the lens holder 3 to the holder support part 4, the arrangement of the vacuum passage 12 and the suction passage 10, etc. may be modified and implemented as desired. be able to.

Effects of the Invention According to the polishing head of the lens polishing machine of the present invention, as described above, during lens polishing, the lens holder is relatively rotatably and swingably supported by the tip projection of the pressure pin. The lens can be polished by applying pressure to the polishing plate and rubbing the lens against the polishing plate. After polishing, the holder support part and lens holder are separated by raising the holder support part and communicating the vacuum passage with the vacuum source. When engaged, the suction passage of the lens holder communicates with the vacuum passage, the lens is attracted to the lens holder, and the lens can be lifted as the holder support section rises. Therefore, the polishing plate can be placed below and the polishing liquid can be applied from above, and the attachment and detachment of the lens can be automated.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional front view of the main part during polishing, FIG. 2 is a longitudinal sectional front view of the main part with the lens being held by suction, and Fig. 3 is a partial sectional front view of the holder support part, Fig. 4 is a vertical sectional front view of the main part of the conventional example,
FIG. 5 is a longitudinal sectional front view of a configuration example for solving the conventional problems. 1... Lens 2... Polishing plate 3... Lens holder 4... Holder support part 9. ...... Space between the lens holder and lens 10 ...... Suction passage 13 ...... Pressure bottle 14 ...... Tip protrusion. Attorney-at-Law Toshio Nakao: 1 person: 1.-Lenλ:
'9--1% 1%'1 Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A lens holder for holding a lens is attached to the lower end of the holder support so that it can be retracted and displaced in the radial direction when retracted, but cannot be displaced due to engagement with each other when not retracted, and the holder support A pressurizing pin is disposed in the holder supporting portion, and the pressing pin is biased to protrude toward the lens holder and has a protruding end thereof in contact with the axial center position of the lens holder so as to be able to freely rotate and swing. A vacuum passage that can communicate with a vacuum source is formed, and the lens holder has a suction passage that communicates with the vacuum passage and opens into a space formed between the lens holder and the lens when the lens holder is not retracted. A polishing head of a lens polishing machine characterized by forming.