JPH0731949Y2 - Auto loader for curve generator - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is mounted on a curve generator autoloader, more specifically, a curve generator that grinds a workpiece such as a lens with a diamond wheel to create a spherical surface. The present invention relates to an autoloader for supplying a work to a curve generator and collecting a processed work from the work.

[Conventional technology]

Supply of work to the conventional curve generator, and
The collected work has been manually performed, but recently, this work is often performed mechanically by an autoloader.

[Problems to be solved by the device]

However, in the case of the conventional autoloader, there are many idle times because it repeats the four steps of picking up the work to be processed, supplying the work to the curve generator, waiting, and collecting the processed work. It wasn't efficient.

Therefore, the present invention provides a work supply / discharge mechanism that can efficiently supply and recover the work to the curve generator by eliminating the idle time and dramatically improve productivity, and a curve generator including the work supply / discharge mechanism. The purpose is to provide an autoloader. [Means for Solving the Problem] The present invention is provided with a magazine for accommodating a large number of works in a stacked state, and a push-up pad for lifting the works by raising the inside by one pitch is provided in the magazine. A pickup cylinder is placed above the head, a vacuum chuck that can be rotated at a right angle is attached to the head, and a rodless cylinder that moves the pickup cylinder in parallel is installed above the magazine, and a work piece is attached to the tip of the rodless cylinder. A work feeding / discharging mechanism is additionally provided, which is provided with a centering chuck for performing the centering of the workpiece, takes out the work from the centering chuck, transfers the work to the chuck of the curve generator, and takes out the processed work chucked by the chuck. Installed, the work supply and discharge mechanism is for work supply and discharge A twin head plate having two vacuum chucks, a unit cylinder in which the twin head plate is pivotally attached to a rod tip, a switching cylinder attached to the unit cylinder for rotating the twin head plate, and the unit cylinder And a cylinder for horizontally moving the centering chuck and a curve side of the curve generator to the chuck side of the curve generator.

[Action]

After the work in the magazine is adsorbed to the vacuum chuck from the topmost one and picked up, the work moves in the horizontal direction by the action of the rodless cylinder in the state of being oriented in the horizontal direction as the vacuum chuck rotates, It is chucked by the centering chuck. The work centered there is adsorbed to the supply vacuum chuck of the work supply / discharge mechanism and taken out, and then supplied to the chuck of the curve generator. The twin head plate is rotated by the action, and the discharge vacuum chuck first moves toward the chuck of the curve generator to discharge the processed work. Immediately thereafter, the supply vacuum chuck moves toward the chuck of the curve generator by the action of the switching cylinder, and supplies a new work. Therefore, the discharge of the work,
No loss of time in supply.

〔Example〕

 A preferred embodiment of the present invention will be described with reference to the drawings.

In the figure, 1 is a curve generator, on which the device according to the present invention is mounted. A magazine 2 is installed on a bracket 4 attached to the lower part of the vertical plate 3 via a magazine base 2a. The magazine 2 is made replaceable. The magazine 2 has a structure in which, for example, two long members each having a right-angled cross-section are arranged at a distance from each other. When such a stack-type magazine is adopted, works of any shape can be accommodated. Reference numeral 6 denotes a motor with an electromagnetic brake arranged on the upper portion of the vertical plate 3, which drives the timing belt 7 in a circulating manner. The timing belt 7 is looped around a timing pulley 8 installed at the lower end of the vertical plate 3. 9 is
The lifting block is fixed to the timing belt 7.
The elevating block 9 is slidably attached to two slide shafts 12 fixed between slide shaft attaching plates 10 and 11 which are vertically provided on the vertical plate 3 so as to be integrated with the movement of the timing belt 7. Thus, the pitch of the workpiece 5 is raised by one pitch along the slide shaft 12, that is, by the thickness of the work 5. A push-up plate 14 having a push-up pad 13 at its tip is fixed to the lifting block 9. The push-up plate 14 includes a magazine base 2a and a bracket 4
5 groups of workpieces stacked in the magazine 2 by facing the inside of the magazine 2 through the slit 2b having the cut end (portion through which the push-up pad 13 passes) formed in Raise. 15 and 16 are microswitches attached to the vertical plate 3, and the microswitches 15
Regulates the rising end of the lifting block 9, and lowers the lifting block 9 that has risen to a predetermined position to the falling end. The micro switch 16 regulates its descending end. Also, 17 is a photoelectric switch. The rise in the fixed position of the work 5 is detected, and the work take-out and transport mechanism described below is controlled.

18 is a pickup cylinder, on its mounting head 19,
A vacuum chuck 20 is rotatably attached. The mounting head 19 is provided with a spring (not shown), and the spring constantly acts on the vacuum chuck 20 so that the vacuum chuck 20 and the mounting head 19 are in a linear state. The mounting head 19 and the vacuum chuck 20 are lowered linearly on the magazine 2 by the action of the pickup cylinder 18, and the work 5 at the uppermost stage is adsorbed and raised.
The working plate 21 of the vacuum chuck 20 contacts the stopper 23 provided vertically on the cylinder mounting bracket 22 as the pickup cylinder 18 moves upward. That is, as the mounting head 19 rises, the working plate 21
Is gradually brought into a horizontal state by hitting the stopper 23, and accordingly the vacuum chuck 20 is rotated against the spring so that the workpiece 5 is brought into a horizontal state while being sucked (state shown in FIG. 1). The pickup cylinder 18 is attached to the rodless cylinder 25 via a bracket 22. Therefore, the work take-out and transfer mechanism reciprocates in the horizontal direction in accordance with the operation of the rodless cylinder 25 installed horizontally, and transfers the work 5 to the work supply / discharge unit.

The rodless cylinder 25 is installed on the plate 27 via a bracket 26. The motor 6 is installed on the back surface of the plate 27, and the upper end of the vertical plate 3 is fixed to the back surface of the plate 27. A centering chuck 28 is provided at the front end portion (right end in FIG. 1) of the rodless cylinder 25. As shown in FIG. 3, the centering chuck 28 is a parallel chuck that opens and closes vertically. The workpiece receiving surface 28a of the chuck is recessed in a mountain shape, and a groove for accommodating the workpiece is formed. This groove width is preferably variable. Therefore, it is adsorbed by the vacuum chuck 20 and the rodless cylinder 25
The work 5 conveyed in accordance with the above operation is clamped by the centering chuck 28, so that the work 5 can be positioned at a fixed position along the work receiving surface 28a (groove) even if it is deviated or tilted. It is moved by force. That is, centering is performed. The centering chuck 28 is installed on the plate 27 via a bracket 29.

Further, on the plate 27, a work supply / discharge unit for supplying and discharging the work 5 to / from the chuck 31 of the curve generator 1 is installed via the cylinder bracket 30. To describe the structure of that portion, 33 is a pin cylinder fixed to the cylinder bracket 30, and its head is fixed to the cylinder mounting plate 34. Also, 35
Is a free mount cylinder for positioning the cylinder mounting plate 34 when the pin cylinder 33 is retracted, and is also mounted on the cylinder bracket 30. The cylinder mounting plate 34 has a unit cylinder
The switching cylinder 38 is attached to the back plate 37 to which the 36 is attached and is fixed to the cylinder head 36a of the unit cylinder 36.
Is attached. A twin head plate 39 is rotatably attached to the cylinder head 36a,
One of the heads has a vacuum chuck for workpiece supply.
40, and a vacuum chuck 41 for discharging a work is arranged on the other head. Further, the twin head plate 39 is provided with a drive arm 42, the tip of which is pivotally attached to the head of the switching cylinder 38,
By operating the switching cylinder 38, the twin head plate 39 can rotate about the pivot shaft 36b of the cylinder head 36a as a fulcrum.

The vacuum chucks 20, 40 used in the present invention,
As shown in FIG. 4, the vacuum pad at 41 has a protrusion 43 made of metal or other hard material at the center of the elastic expanded pad 42. This protrusion 43
Has a function of pressing the center of the work when the work is attracted and accurately pushing the work into the chuck 31.

44 is an operation panel, and 45 is an automatic opening / closing mechanism of the chuck 31. The automatic opening / closing mechanism 45 is not directly related to the present invention, and thus its detailed description is omitted. An elastic material such as a leaf spring is provided on the inner diameter surface of the chuck 31 so that the opening degree of the chuck 31 becomes large. By doing so, the work 5 can be reliably and smoothly inserted into the chuck 31.

The operation of the entire apparatus having the above configuration will be described. When the magazine 2 in which a predetermined number of works 5 are stacked is set on the bracket 4 and started, the pickup cylinder 18 first descends, the vacuum chuck 20 arrives on the magazine 2, and the topmost work 5 is placed. Adsorb.
Immediately after that, it rises, but when it rises to a fixed position, the stopper 23 acts on the working plate 21 to rotate the vacuum chuck 20 in a horizontal state. When the rodless cylinder 25 operates in this state, the vacuum chuck 20 advances while adsorbing the work 5, and supplies the work 5 into the centering chuck 28. When the work 5 is chucked there,
The vacuum chuck 20 retreats to the original position, and immediately or after some time, descends again to pick up the next work 5. When the uppermost work 5 is picked up, the photoelectric switch 17 operates to operate the motor 6 to raise the work group in the magazine 2 by one pitch.

The work 5 chucked by the centering chuck 28 is centered there. Then, when the pin cylinder 33 moves backward, the supply vacuum chuck 40 faces the centering chuck 28 and adsorbs the centered work 5.
Then, after the centering chuck 28 releases the work 5, the pin cylinder 33 moves forward and the supply vacuum chuck
Put 40 out of centering chuck 28. Then, the unit cylinder 36 and the switching cylinder 38 are moved forward to rotate the twin head plate 39, and at the same time, the discharge vacuum chuck 41 is moved to a position corresponding to the chuck 31 of the curve generator 1. Then, when the pin cylinder 33 moves backward again, the discharging vacuum chuck 41 enters the chuck 31 and sucks the processed work. (It goes without saying that there is no processed workpiece in the first operation.). Subsequently, the pin cylinder 33 moves forward and the switching cylinder 38 moves backward to reverse the twin head plate 39, and this time the supply vacuum chuck 40 corresponds to the chuck 31. Thereafter, the supply vacuum chuck 40 moves back and forth by the action of the pin cylinder 33 in the same manner as described above, and chucks the work 5 to be processed.
Supply to. The processed work that is taken out is then released and dropped on the recovery chute. Then, the above operation is repeated thereafter. The supply vacuum chuck 40 and the discharge vacuum chuck 41 may be reversed.

[Effect of device]

The present invention is as described above, and since the work can be automatically supplied and collected to and from the curve generator efficiently without idle time, the productivity can be dramatically improved.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a side view thereof, and FIGS. 3 and 4 are enlarged views of essential parts thereof. Explanation of code 1 …… Curve generator 2 …… Magazine, 13 …… Pushup pad 18 …… Pickup cylinder 20 …… Vacuum chuck 25 …… Rodless cylinder 28 …… Centering chuck, 31 …… Chuck 33 …… Pin Cylinder 36 …… Unit cylinder, 38 …… Switching cylinder, 39 …… Twin head plate 40 …… Supply vacuum chuck 41 …… Discharge vacuum chuck 42 …… Pad, 43 …… Projection

Claims (2)

[Scope of utility model registration request] 1. A magazine for accommodating a large number of works in a stacked state is provided, and a push-up pad for lifting the works by raising the inside by one pitch is provided in the magazine, and a pickup cylinder is arranged above the magazine. , A vacuum chuck that can be rotated at a right angle is attached to the head, and a rodless cylinder that moves the pickup cylinder in parallel is installed above the magazine, and a centering chuck that centers the work is provided at the tip of the rodless cylinder. And a work supply / discharge mechanism for taking out the work from the centering chuck and transferring it to the chuck of the curve generator, and taking out the processed work chucked at the chuck. Ejection mechanism has two vacuum chucks for supplying and ejecting workpieces A twin head plate, a unit cylinder in which the twin head plate is pivotally attached to the rod tip, a switching cylinder attached to the unit cylinder to rotate the twin head plate, the unit cylinder to the centering chuck, An autoloader for a curve generator, which includes a cylinder that moves horizontally on the chuck side of the curve generator. 2. A chuck for a curve generator according to claim 1, wherein an elastic material such as a leaf spring is arranged on the inner diameter surface.