JP2645775B2 - Ring-type workpiece supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ring-shaped work, such as a piston ring, which is held in a magazine in a stacked state and cut out in order from the lower one to cover a workpiece such as a diameter-enlargement guide used in a piston ring assembly process. The present invention relates to an apparatus for supplying a ring-shaped work to be supplied to a supply.

[0002]

2. Description of the Related Art Conventionally, as a supply device for a piston ring, according to Japanese Utility Model Publication No. 61-16020, a cut-out piece is provided on an upper surface of a gantry on which a magazine is erected, through a lower space of the magazine, so as to be movable forward and backward of the gantry. A recessed part for receiving one piston ring is formed on the upper surface of the front end of the cutout piece, and the front end is directly under the magazine when the cutout is retracted, and the lowermost piston ring held by the magazine is inserted into the recessed part. With the cutting piece forward, the cutting piece is cut out in front of the gantry while being held in the recess of the lowermost piston ring, and the piston ring is cut out at this cutting position in a state in which the piston ring is irreversibly locked by appropriate locking means. It is known that a piston ring is dropped into a diameter-enlarging guide disposed at a lower front side of a gantry by retreating a piece.

[0003]

In the above-described apparatus, the magazine and the diameter-enlarging guide must be spaced apart from each other in the front-rear direction, which increases the size of the apparatus in the front-rear direction. The present invention is directed to an apparatus which can supply a piston ring stacked on a magazine to a supply object in order from a lower one even when a supply object such as a diameter-enlargement guide is arranged at a position directly below the magazine. Its purpose is to make the system more compact.

[0004]

In order to achieve the above object,
The present invention relates to a ring-shaped workpiece supply apparatus including: a magazine for holding a ring-shaped work in a stacked state; and a cutting mechanism for sequentially cutting the work held by the magazine from a lower side. A work holder that supports the work in a form that allows the work to fall when the work moves slightly forward in the front, and the cutting mechanism is moved forward and backward below the magazine. A cutting piece that cuts out the work forward by contacting the inner peripheral portion of the front side of the work supported by the work holder by moving forward, and abutting against the rear end of the cutting piece. A push rod for moving the cut piece forward, and the cut piece when the push rod retreats, and the rear end of the cut piece falls to the front end of the push rod. Characterized in that a means allowed to urge held in a predetermined retracted position, as opposed to exist a gap to capacity.

[0005]

The push rod is advanced in a state in which the material to be supplied is disposed immediately below the magazine. According to this, the push rod comes into contact with the rear end of the cut piece, the cut piece is pushed forward, and the ring-shaped work supported by the work holder is cut by the contact of the cut piece with the front inner peripheral surface. Will be issued. When the workpiece moves a little forward due to this cutting, the workpiece comes off the work holder and falls.At this time, the rear side of the workpiece is caught by the push rod that is in contact with the rear end of the cut piece, and Is inclined forward and the front side of the workpiece comes into contact with the front side of the peripheral surface of the material to be supplied. Next, the push rod is retracted, and the cutout piece at the beginning of the retraction follows the push rod by the urging force and retreats,
After the next work is seated on the work holder, and then the cut piece reaches the predetermined retreat position, the push rod is separated from the rear end of the cut piece, and the rear side of the work caught on the push rod becomes the cut piece. It falls through the gap with the push rod. Here, since the front side of the workpiece is previously engaged with the peripheral surface of the supplied object, the workpiece does not largely decenter with respect to the supplied object. The extrapolation is reliably performed over the entire circumference. By the way, when oil for rust prevention is applied to the work, the work is easily adhered to each other via the oil, and even if the work is cut out as described above, the work is stuck at a portion where the work contacts the work thereon. May not fall.
In this case, a regulating member that engages with a peripheral surface of the work above the work supported by the work holder and regulates cutting of the work is provided below the magazine, and a regulating member is provided on the lower surface of the regulating member. If an inclined portion that is inclined downward and downward is formed, the work is forcibly pushed down by the inclined portion when the work is cut out, and the work is separated from the work on the work and reliably falls.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, reference numeral 1 denotes a transport pallet. A cylindrical jig 1a on the pallet 1 positions and holds a piston P, and a diameter-enlarging guide 2 is fitted to the piston P from above. In this state, the transport pallet 1 is transported, and the piston ring R is supplied to the enlarged diameter guide 2 by the supply device 3 provided in the middle of the transport path. As a result, the piston ring R is pushed out from the lower end of the diameter-expanding guide 2 and assembled to the piston P.

The supply device 3 includes a support frame 4 erected on the rear side of the transport path with a direction perpendicular to the longitudinal direction of the transport path as a front-rear direction. A bottomed cylindrical magazine holder 6 is mounted via the support plate 5 so as to be located immediately above the transport path.
Cylindrical magazine 7 having a rear slit through which can be inserted
Are detachably fitted from above, and the piston ring R is vertically stacked and loaded over the magazine holder 6 around the magazine 7 with the abutment portion of the piston ring R engaged with the support plate 5. I got it.

The magazine holder 6 is inserted into a through hole 8a formed in a horizontal gantry 8 projecting forward from the support frame 4 with a gap through which a piston ring R can pass. As shown in FIGS. 2, 3 and 5, on the lower surface of the magazine holder 6, a first work holder 9 having a projecting portion 9a at the lower end for projecting and supporting the front side of the piston ring R from its inner diameter side is provided. 3 and 4, on the lower surface of the gantry 8, a pair of right and left sides having lower end overhangs 10a for supporting two rear left and right portions of the piston ring R from the outer diameter side, respectively. Of the second work holder 10, 10
And the lowermost ring of the piston rings R loaded in the magazine 7 is supported by these work holders 9 and 10, and the lowermost piston ring R is provided with the overhang portions 9a,
When the piston ring R is moved forward by a small distance corresponding to the overhang width of 10a, the piston ring R is released from the support by the work holders 9 and 10, and falls.

The first work holder 9 is provided with a cut-out piece 11 which can be brought into contact with the inner peripheral surface of the front side of the piston ring R so as to be slidable in the front-rear direction. This will be described in detail with reference to FIG. 6. A longitudinally extending guide groove 12 is formed on the lower surface of the first work holder 9, and the cutout piece 11 is slidably stored in the guide groove 12. A holding plate 13 for holding the cut-out piece 11 was provided on the lower surface of the first work holder 9, and the first work holder 9 was fastened together with the holding plate 13 to the lower surface of the magazine holder 6 by bolts 14. The front half of the cut-out piece 11 is formed in a forked shape, and is formed at the front end of the guide groove 12 at the front end of the cut-out piece 11 so as to be engaged with the forked part of the cut-out piece 11 at the rear half of the cut-out piece 11. The front end of the spring 15 inserted into the recessed hole is engaged to urge the cutout piece 11 rearward, and a stopper 11a is formed at the front end of the cutout piece 11 so as to project downward. Board 13
Is biased and held at a predetermined retracted position where the stopper 11a is engaged with the front edge of. In this retracted position, the cut-out piece 11 is set so as to fit within the projection plane below the magazine 7 over its entire length, and the downward movement of the piston ring R to the projecting portions 9a, 10a of the work holders 9, 10 is performed. The raised portion 11b is formed at the rear end of the cut-out piece 11 so that the inner peripheral surface of the rear side of the piston ring R can be guided by the raised portion 11b.

As shown in FIG. 2, a push rod 16 is provided in contact with a lower portion of the rear end of the cut-out piece 11, and the rod 16 can be advanced and retracted by a cylinder 17 mounted on the support frame 4. The piece 11 is pushed by the push rod 16 and moves forward against the spring 15 so that the cut piece 1
1 is in contact with the inner peripheral surface of the front side of the piston ring R supported by the work holders 9, 10, so that the ring R is cut out forward. Follows the push rod 16 by the urging force of the spring 15 and retreats to the retracted position. After the subsequent retraction of the push rod 16, the piston rod R is moved between the rear end of the cutout piece 11 and the front end of the push rod 16. A gap that allows the side to fall was opened. still,
In this embodiment, as shown in FIG. 5, one of the piston rings R is arranged such that the upper edge of the front end of the cutout piece 11 is slightly lower than the upper surface level of the lowermost piston ring R seated on the overhang portion 9a. Although the cutting is performed, the height of the upper edge of the front end of the cutting piece 11 can be set higher than that, and a plurality of piston rings R can be cut.

Further, as shown in FIGS. 2 to 5,
A first regulating member 18 facing the first work holder 9 on the lower surface of the gantry 8 and a pair of second regulating members 19, 19 facing the second work holders 10 and 10 on the lower surface of the magazine holder 6.
The first regulating member 18 is engaged with the outer peripheral surface of the front side of the piston ring R above the lowermost piston ring R, and the second regulating member 19 is engaged with the inner peripheral surface of the rear side of the ring R. Thus, the upper piston ring R was prevented from moving forward when the lowermost piston ring R was cut out forward. Then, as shown in FIG. 5, a convex portion 18b projecting below the upper surface level of the lowermost piston ring R is formed on the lower surface of the central portion of the first regulating member 18, and the rear surface of the convex portion 18b is formed. To form an inclined portion 18a inclined downward toward the front,
Also, the lower end of the second regulating member 19 is lower than the upper surface level of the lowermost piston ring R, and an inclined portion 19a that is inclined downward and forward is also formed at the lower end of the second regulating member 19. Thus, the lowermost piston ring R is cut out and the piece 1 is cut out.
When the piston ring R is cut forward by the advance of 1, the piston ring R is guided down by the inclined portions 18a, 19a and is pushed down, and the piston ring R is attached to the piston ring R thereon by the oil applied to the piston ring R. Even if it is attached, the cut-out piston ring R is separated from the piston ring R on it, and drops reliably.

Next, the operation of the supply device 3 configured as described above will be described with reference to FIG. The push rod 16 is moved forward while the transport pallet 1 is transported to the supply device 3 and the enlarged-diameter guide 2 is positioned immediately below the magazine 7.
The lowermost piston ring R seated on the overhang portions 9a, 10a of the work holders 9, 10 is cut out forward by the cutout piece 11. As a result of this cut-out, the piston ring R falls off the overhanging portions 9a and 10a, but the rear side of the piston ring R is hooked on the push rod 16 and the
As shown in (a), the piston ring R is tilted forward and downward, and its front side comes into contact with the front side of the peripheral surface of the diameter-enlargement guide 2.

Next, the push rod 16 is retracted. At this time, the cut-out piece 11 retreats following the push rod 16 to a predetermined retract position by the urging force of the spring 15, and as shown in FIG. 7 (b). The next piston ring R is overhang 9
a, while the rear end of the cut-out piece 11 abuts on the rear side of the cut piston ring R, the piston ring R engages the front side with the peripheral surface of the enlarged diameter guide 2. The guide 2 is pulled back so as to be substantially concentric with the guide 2. Then, when a gap is formed between the rear end of the cut-out piece 11 and the front end of the push rod 16 due to the subsequent retraction of the push rod 16, the rear side of the piston ring R is pushed as shown in FIG. The piston ring R falls off from the outer periphery 16 and the piston ring R is extrapolated over the entire circumference of the diameter-increase guide 2.

Although the embodiment in which the present invention is applied to the apparatus for supplying the piston ring to the diameter expanding guide has been described above, the present invention can be applied to the supply of a ring-shaped work other than the piston ring.

[0015]

As is apparent from the above description, according to the first aspect of the present invention, the ring-shaped workpieces loaded in the magazine in a stacked state are cut out in order from the lower one and arranged immediately below the magazine. The device can be reliably dropped into the supplied material, and the size of the device can be reduced by shortening the longitudinal dimension of the device.
Furthermore, according to the second aspect of the invention, even if the workpieces are stuck together by oil, the cut-out workpiece can be separated from the workpiece thereabove and reliably dropped, and the workpiece can be dropped onto the supply target. This has the effect of further improving the reliability of embedding.

[Brief description of the drawings]

FIG. 1 is a front view of an example of the device of the present invention.

FIG. 2 is a side view cut along the line II-II of FIG. 1;

FIG. 3 is a plan view cut along the line III-III of FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3;

FIG. 5 is an enlarged sectional view taken along line VV of FIG. 3;

FIG. 6 is an exploded perspective view of the main part.

FIG. 7 is a process chart showing the operation of the apparatus of the present invention.

[Explanation of symbols]

 Reference Signs List 3 Supply device 7 Magazine 9, 10 Work holder 11 Cutout piece 11a Stopper portion 15 Spring 16 Push rod 18, 19 Restriction member 18a, 19a Inclined portion R Piston ring (work)

Claims (2)

(57) [Claims] 1. A ring-shaped work supply apparatus comprising: a magazine for holding a ring-shaped work in a stacked state; and a cutting-out mechanism for cutting out the work held by the magazine in order from a lower side. A work holder that supports the work in a form that allows the work to fall when the work is slightly moved forward is provided below the magazine, with the direction being forward, and the cutting mechanism is provided below the magazine. A cut piece that is slidably provided in the front-rear direction and contacts the inner peripheral portion of the front side of the work supported by the work holder by moving forward, and cuts the work forward, and abuts on the rear end of the cut piece. A push rod for moving the cut piece forward by contacting the cut piece, and the cut piece is dropped when the push rod retreats, and the rear end of the cut piece falls to the front end of the push rod. A means for urging and holding the urging member at a predetermined retreat position where the member is opposed to the ring-shaped work member with a clearance allowing the ring-shaped work. 2. A regulating member which engages with a peripheral surface of a work above a work supported by the work holder and regulates cutting of the work is provided below the magazine, and a lower surface of the regulating member is provided on a lower surface of the regulating member. The supply device for a ring-shaped workpiece according to claim 1, wherein an inclined portion inclined downward toward the front is formed.