JP2010253609A - Workpiece take-out and supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece take-out and supply device capable of surely holding an annular workpiece by a simple structure. <P>SOLUTION: A workpiece holding tool 1 mounts a guide pipe 3 on a frame 2 and inserts a centering shaft 5 into the guide pipe 3. A flange 6 fixed to the shaft 5 is energized in a projecting direction by a spring 7 provided outside the guide pipe 3. Fingers 8 are provided on a lower surface of the frame 2. As for the fingers 8, the three fingers 8 are provided at equal intervals in a peripheral direction, for instance, are made openable/closable in a radial direction orthogonal to a shaft direction of the shaft 5 and are energized in closing directions by the non-illustrated spring 7. Opening/closing centers of the three fingers 8 and the shaft 5 are set to coincide with each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a workpiece take-out / supply device that takes out a workpiece having a through hole, such as a bearing or an oil seal, from a storage container and moves it to a predetermined location.

  Conventionally, there are those disclosed in Patent Documents 1 to 3 as prior arts in which oil seals and the like are separated one by one and fitted to predetermined portions of other members.

  In Patent Document 1, oil seals are stacked and inserted into a columnar magazine standing on a swivel table, and the stacked oil seals are gradually raised so that the uppermost oil seal is placed at the upper end of the magazine. It is disclosed to press fit into a convex portion formed on the outer peripheral surface of the set movable portion.

In Patent Document 2, as a device for supplying oil seals one by one, a first guide hole and a second guide hole in the vertical direction parallel to each other are formed in the jig base, and these first and second guide holes are formed. The slider is inserted into the horizontal hole connecting the guide holes, the oil seal in the first guide hole is inserted into the receiving hole formed in the slider, and the oil seal in the receiving hole is inserted into the second guide hole by sliding the slider. A feeding structure is disclosed.

In Patent Document 3, oil seals are stacked and inserted into a guide rod, the oil seal protruding from the upper end of the guide rod is gripped by a chuck, and the lower oil seal and moving body are separated by moving downward. The contents are disclosed.

Japanese Patent Laid-Open No. 05-277846 Japanese Utility Model Publication No. 63-144129 Japanese Utility Model Publication No. 03-113326

  In each of the above-described prior arts, after a work such as an oil seal is stacked on a supply device, the work is separated and pressed into a predetermined place one by one, and the work stored in the bucket is set in the supply device. Is exclusively done manually.

  If the robot can carry out the work stored in the bucket until it is set in the supply device, the work efficiency is greatly improved. However, it is difficult to align and clamp the stacked workpieces, and it is difficult to grip the last workpiece remaining on the bottom of the bucket with the fingers of the robot. If the workpiece is bent due to the weight of the workpiece, it is still difficult to grip.

In order to solve the above problems, the present invention provides a workpiece take-out and supply device that takes out a workpiece having a through-hole housed in a bucket and supplies the workpiece to another place, the device including a shaft inserted into the through-hole, And a chuck for gripping the workpiece in a state where the shaft is inserted, and the shaft is positioned at the open / close center of a plurality of fingers constituting the chuck.

The shaft is movable in the axial direction and is urged in the axial protruding direction by a spring so that the shaft moves back in the axial direction against the spring, and this is detected by a sensor. It can be set as the structure which senses the bottom face of a bucket.

In addition, by making the shaft movable in parallel with the bottom surface of the bucket, the workpieces stored in the bucket can be aligned in a state where the workpieces are stacked.

The bucket may be placed on a table that is rotatable about an inclined axis. By doing so, rough alignment becomes possible.

Further, as the structure of the chuck, it is arbitrary whether a plurality of fingers constituting the chuck grip the workpiece from the outside or the inside. The movement of the finger can be selected according to the workpiece.

According to the workpiece take-out / supply device according to the present invention, the workpieces stored and loaded in the bucket can be taken out from the bucket without changing the number of stacked pieces as it is, and can be used in an engine assembly line or the like. Since it can supply, work efficiency improves.

Further, by making the shaft movable in the axial direction, the bottom surface position of the bucket can be detected, and even if the bucket bottom surface is curved by the weight of the workpiece, the workpiece can be taken out from the bucket.

  In addition, by simply moving the shaft parallel to the bottom of the bucket with the shaft inserted through the through holes of the stacked workpieces, the stacked workpieces can be easily aligned, and subsequent work is easy. Become.

In addition, by providing a platform on which the bucket can be placed in an inclined state, the stacked workpieces can be roughly positioned, and the workpiece can be securely gripped by the chuck.

The front view of the engine assembly line which applied the workpiece picking_out | feeding apparatus which concerns on this invention The top view of the engine assembly line which applied the workpiece picking_out | feeding apparatus which concerns on this invention The figure which shows the state before the chuck | zipper of the workpiece picking_out | feeding apparatus which concerns on this invention detects a bucket bottom face. The figure which shows the state which the chuck | zipper of the workpiece taking-out / supply apparatus concerning this invention detected the bucket bottom face The figure which shows the state which the chuck | zipper of the workpiece taking-out / supply apparatus based on this invention hold | gripped the workpiece | work. The perspective view which shows another Example of a bucket stand (A)-(f) is the figure explaining the effect | action of the workpiece taking-out / supply apparatus which concerns on another Example.

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, a workpiece (bearing) press-fitting unit U is disposed across the engine assembly line L, and a workpiece take-out / supply device R according to the present invention is disposed on the side of the press-fitting unit U. Yes.

The engine assembly line L includes a conveyor CV that conveys cylinder barrels at equal intervals, the press-fitting unit U includes a press-fitting punch P and a cylinder CY that raises and lowers the press-fitting punch P, and a workpiece picking / feeding device R is a workpiece gripping jig 1 is provided.

As shown in FIG. 3, the workpiece gripping jig 1 has a guide pipe 3 attached to a frame 2, and the guide pipe 3 can be advanced and retracted in the axial direction by a cylinder 4. A centering shaft 5 is inserted into the guide pipe 3 and a flange 6 fixed to the shaft 5 is urged in a protruding direction by a spring 7 provided outside the guide pipe 3.

Fingers 8 are provided on the lower surface of the frame 2. For example, the fingers 8 are provided at equal intervals in the circumferential direction of the three fingers, can be opened and closed in a radial direction perpendicular to the axial direction of the shaft 5, and are urged in a closing direction by a spring (not shown). The opening / closing center of the three fingers 8 and the shaft 5 are set to coincide with each other.

A cam 9 is formed on the outer periphery of the guide pipe 3 and surrounded by the fingers 8 in two upper and lower stages, and a cam follower 10 that contacts the cam 9 is formed on the inner side of the fingers 8. The reason why the cam 9 is provided in two upper and lower stages is to make the movement of the finger 8 parallel to the shaft 5.

A sensor 11 is attached to the side surface of the frame 2. As shown in FIG. 4, the sensor 11 has a flange 6 attached to the shaft 5 as the work gripping jig 1 is lowered, the lower end of the shaft 5 is in contact with the bottom surface of the bucket 12, and the shaft 5 is relatively raised. Is detected close to the position of the sensor 11.

By lowering the workpiece gripping jig 1 by a predetermined amount from the position where the sensor 11 has detected the flange 6, that is, the height of the stacked workpiece W, the bottom surface of the bucket 11 is placed on the workpiece W as shown in the figure. Even if the workpiece is bent due to its weight, the workpiece gripping jig 1 can be advanced to an accurate depth in the workpiece W that is reliably stacked.

When the workpiece gripping jig 1 has entered the predetermined position, the cylinder 4 is operated to lower the guide pipe 3. Then, as shown in FIG. 5, the cam 9 is lowered integrally with the guide pipe 3, the finger 8 is opened radially outward, and the through hole of the workpiece W is gripped from the inside.

Thereafter, the workpiece W is transferred to the magazine M while being held by the workpiece gripping jig 1 of the workpiece take-out / supply device R, and after the cutting is finished, the workpiece W is transferred one by one onto the buffer conveyor of the press-fitting unit U. The workpiece W is press-fitted into the cylinder barrel by the press-fitting punch P one by one.

FIG. 6 is a perspective view showing another embodiment of the bucket base. The bucket base 20 has a disk shape and is provided with a positioning piece 21 for fixing the corner portion of the bucket 12, and the shaft 22 of the bucket base 20 is It can be tilted by θ in the vertical plane, and can be rotated in the direction a about the shaft 22.

The bucket 12 is set on the bucket base 20 in the horizontal state with the shaft 22 vertical, and then rotated left and right around the shaft 22 in a state where the bucket 12 is tilted by θ. Since the workpieces in the state are aligned to some extent, for example, it is possible to prevent a problem that the centering shaft 5 inserted into the through hole of the stacked workpieces does not contact the bottom surface of the bucket 12.

FIGS. 7A to 7F are views for explaining the operation of the workpiece take-out / supply device according to another embodiment. In this embodiment, the bucket 12 is set obliquely and the finger 8 moves the workpiece W. Grasping from outside.

First, as shown in FIG. 7A, the shaft 5 is aligned with the position of the through holes of the stacked workpieces, and then, as shown in FIG. Insert the shaft 5 into position. Then, as shown in (c), the workpiece gripping jig 1 is moved in parallel with the bottom surface of the bucket 12, and the stacked workpieces are separated from the adjacent stacked workpieces, and a gap is formed and aligned. .

Thereafter, as shown in (d), the workpiece gripping jig 1 is further advanced to put the fingers 8 around the stacked workpieces, and as shown in (e), the fingers 8 are closed, and (f) ), The workpiece W is taken out from the bucket 12.

In the engine assembly line, the workpiece take-out / supply device according to the present invention supplies a workpiece having a through hole, such as an oil seal or a bearing, from a state where it is stored in a bucket to an assembling position or the like without manpower. Can be used for etc.

DESCRIPTION OF SYMBOLS 1 ... Work holding jig, 2 ... Frame, 3 ... Guide pipe, 4 ... Cylinder, 5 ... Centering shaft, 6 ... Flange, 7 ... Spring, 8 ... Finger, 9 ... Cam, 10 ... Cam follower, 11 ... Sensor, DESCRIPTION OF SYMBOLS 12 ... Bucket, 20 ... Bucket stand, 21 ... Positioning piece, 22 ... Shaft of a bucket stand.
L: Engine assembly line, U: Work press-fit unit, R: Work take-out / feed device, P: Press-fit punch, CY: Cylinder, M: Magazine, W: Work.

Claims (6)

In a workpiece take-out / supply device that takes out a workpiece having a through-hole housed in a bucket and supplies it to another place, the device includes a shaft inserted into the through-hole and a workpiece in a state in which the shaft is inserted. And a chuck for gripping the workpiece, wherein the shaft is positioned at the open / close center of a plurality of fingers constituting the chuck. 2. The workpiece take-out / supply device according to claim 1, wherein the shaft is movable in the axial direction and is urged in a protruding direction in the axial direction by a spring, and the shaft is retracted in the axial direction against the spring. The workpiece take-out / feeding device is characterized by sensing the bottom surface of the bucket. 2. The workpiece take-out / supply device according to claim 1, wherein the workpieces are stored in a bucket in a stacked state, and the workpieces stacked in the stacking direction are moved by moving the shaft parallel to the bottom surface of the bucket. Work take-out / feeding device characterized by being aligned. 2. The workpiece take-out / supply device according to claim 1, further comprising a bucket base for setting the bucket, the bucket base having a shaft, the shaft being tiltable with respect to a vertical direction and having the shaft as a center. Is a workpiece take-out / feeding device characterized by being rotatable. 2. The workpiece picking / feeding device according to claim 1, wherein the plurality of fingers constituting the chuck grip the workpiece from outside or inside. 6. The workpiece take-out / supply device according to claim 1, wherein the work is an annular oil seal or a bearing.

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