JPH0630357Y2 - Work supply / recovery device for lens centering - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention automatically supplies a work when grinding or cutting by a bell chuck method such as centering of a lens. The present invention relates to a work supply / collection device for collecting processed works.

[Conventional technology]

Taking the centering process of the lens (grinding process of the outer diameter of the lens with respect to the optical axis) as an example, as shown in FIG. 2, the work (lens) 1 first adsorbs one surface thereof to the fixed side holder 2 and
Next, the movable holder 3 is moved to the work 1 side, and the work 1 is pressed and held by both holders 2 and 3. At that time, the workpiece suction surfaces of the holders 2 and 3 are tapered,
When the work 1 is deviated from the shaft center, the work 1 is moved so as to be closer to the shaft center along with the holding. In this state, the rotating diamond wheel 4 comes close to the work 1 and grinding is performed.

By the way, although the work of loading the work 1 into the holder 2 has been performed manually until several years ago, recently, various autoloaders for automatically performing the work have appeared. As a representative example thereof, as shown in FIG. 3, a U-shaped head 6 is attached to the arm 5, a recovery vacuum pad 7 is provided at the upper end of the head 6, and a supply vacuum pad 8 is provided at the lower end. There is one installed respectively. In this apparatus, the supply vacuum pad 8 is waiting in a state where the work 1a before processing is adsorbed, the holder 3 is separated after the processing of the previous work is completed, and when the state shown in FIG. It moves forward between 3 and reaches the position where the center of the collecting vacuum pad 7 is aligned with the axis of both holders 2, 3. Then, the head 6 laterally moves to the fixed holder 2 side, adsorbs the processed work 1b adsorbed to the fixed holder 2, and then laterally moves in the opposite direction to return to the original position. Then, after raising by the distance between the two pads 7 and 8 (thus, the center of the supply vacuum pad 8 is the two holders 2,
3), and moves laterally to the fixed holder 2 side again, and supplies the workpiece 1a before processing to the fixed holder 2. Then, after moving laterally again, it retreats and stands by.

[Problems to be solved by the device]

The conventional autoloader described above has many movements (processes) such as lateral movement, lateral movement in the opposite direction, upward movement, lateral movement, lateral movement in the opposite direction, and machining from the time the head 6 advances to the time it retracts. It is necessary and inevitably takes a long processing time and is inefficient because it is accumulated. Not only that, the size of the diameter of the work 1 is limited to a range in which the work 1a before processing and the work 1b after processing do not overlap when the pads 7 and 8 are sucked, and the range of usable work is also limited. There are also drawbacks. It can be pointed out that other types of autoloaders also have the drawback that it takes time to load and unload because of the large number of steps.

The present invention has been made to eliminate the drawbacks of the prior art.

[Means for Solving the Problems]

According to the present invention, a parallel chuck is fixed to a drive shaft of a linear drive unit composed of a direct-acting cylinder, a pinion rack mechanism, etc., and a supply arm and a recovery arm are attached to the parallel chuck in parallel, Install vacuum pads outward on the upper ends of the arm and recovery arm,
The two chuck pads are sandwiched, and a fixed side holder and a movable side holder of a bell chuck are arranged so that they can be positioned coaxially with each other. Proximity to each holder, or to operate the supply arm and the recovery arm so as to separate from the respective holders at the same time, and the linear drive unit guides the vacuum pad coaxially between the respective holders, Further, the above problem is solved by a work supply / recovery device in the centering processing of a lens, which is characterized in that the reciprocating operation is performed so as to be removed from the work.

[Action]

After the processed work is adsorbed and held by the holder on the side of the collecting vacuum pad, and the unprocessed work is adsorbed by the supply vacuum pad, the machine operates between the open holders by the action of the linear drive unit. proceed. Then, when both arms are opened by the action of the parallel chuck, the supply vacuum pad approaches the holder on the empty side, and the work before processing is supplied to the holder and held by suction.
At that time, the recovery vacuum pad is close to the holder on the side where the processed work is adsorbed and held, and adsorbs the processed work. Next, when both arms are closed by the action of the parallel chuck, the work before processing is separated from the supply vacuum pad, and the processed work is moved to the recovery vacuum pad. After that, each vacuum pad is removed from between the holders by the action of the linear drive unit and moved to the work supply / collection unit. As described above, in this apparatus, since the work is supplied and collected at the same time, the idle time is short.

〔Example〕

A preferred embodiment of the present invention will be described with reference to FIG.
In the figure, reference numeral 12 denotes a supply arm, which is provided with a supply vacuum pad 13 for adsorbing the unprocessed work 11 at its tip. Reference numeral 14 denotes a recovery arm, which is also provided with a recovery vacuum pad 15 for adsorbing the processed work 11a at the tip thereof. Reference numeral 16 is a commercially available parallel chuck, to which the supply arm 12 and the recovery arm 14 are attached so that the pads 13 and 15 thereof face outward. The parallel chuck 16 is for linearly driving both arms 12 and 14 simultaneously in opposite directions, and can be replaced with a mechanism capable of such driving.
A drive shaft 17 extends from the linear drive unit 18 and is fixed to the parallel chuck 16, and is reciprocally driven by the linear drive unit 18. The linear drive unit 18 is composed of a direct acting cylinder, a pinion rack mechanism, and the like. Reference numeral 19 is a fixed holder, and 20 is a movable holder. The supply vacuum pad 13 and the recovery vacuum pad 15 can be replaced by any known gripping means.

In the above configuration, this device is provided with the supply vacuum pad 13
It stands by in the state where the workpiece 11 before processing is adsorbed. Then, the machining of the previous work is completed, and the movable holder 20
(The fixed holder 19 may be used. In that case, the positions of both arms 12, 14 are reversed.) When the machined work 11a is sucked and held back, the linear drive unit 18 acts to drive the drive shaft. 17 is driven forward and both arms are moved through the parallel chuck 16.
12 and 14 move forward, and the center of both pads 13 and 15 is the holder 19 and 2 respectively.
It reaches the axis of 0. Therefore, when the parallel chuck 16 opens and both arms 12 and 14 are driven in the separating direction, the work 11 before processing is processed between the supply vacuum pad 13 and the suction surface of the fixed side holder 19 and processed. The work 11a
Is the suction surface of the movable holder 20 and the vacuum pad for recovery.
Between 15 and 15 will be held at the same time. There, the work 11 before processing and the work 11a after processing are delivered. That is, the supply vacuum pad 13
The workpiece 11 before processing which is released from is held by suction on the fixed side holder 19, and the workpiece 11a after processing which is released from the movable side holder 20 is held by suction on the recovery vacuum pad 15. Immediately thereafter, the parallel chuck 16 closes, and the linear drive unit 18 moves backward to return to the initial position.

Further, the present apparatus can be provided with a function of taking out an unprocessed work from a magazine for storing the work and returning the processed work to the work. To this end, a swing drive section (rotary actuator or motor) that rotates the apparatus 180 degrees or 90 degrees forward and backward and a lift drive section that moves the apparatus up and down may be installed.

This device can be applied to all devices that perform processing by the bell chuck method, and the work is not limited to a curved surface such as a lens, and can be a flat plate. is there.

[Effect of device]

The present invention is as described above, and since the work is supplied and collected at the same time, the idle time in all operations is very short, which not only greatly improves the work efficiency but also increases the work size. The effect is that there is no restriction due to size.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is a diagram showing a chuck and a processing state of a work, and FIG. 3 is a diagram showing an example of a conventional autoloader. Explanation of code 11 …… Work before processing, 11a …… Work processed 12 …… Supply arm 13 …… Supply vacuum pad 14 …… Supply arm 15 …… Recovery vacuum pad 16 …… Parallel chuck 17 ...... Drive shaft 18 …… Linear drive unit 19 …… Fixed side holder 20 …… Movable side holder

Claims (1)

[Scope of utility model registration request] 1. A parallel chuck is fixed to a drive shaft of a linear drive unit composed of a direct-acting cylinder, a pinion rack mechanism, etc., and a supply arm and a recovery arm are attached in parallel to the parallel chuck, and the supply is performed. Install vacuum pads outward on the upper ends of the recovery arm and the recovery arm,
The two chuck pads are sandwiched, and a fixed side holder and a movable side holder of a bell chuck are arranged so that they can be positioned coaxially with each other. Proximity to each holder, or to operate the supply arm and the recovery arm so as to separate from the respective holders at the same time, and the linear drive unit guides the vacuum pad coaxially between the respective holders, In addition, a work supply / recovery device for centering processing of a lens, which is characterized by reciprocating motion so as to get out of it.