JPH0117383Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention can be used, for example, in a press line consisting of a blanking press and a transfer press, while aligning the workpieces in the required posture between the two presses. It relates to a device for transporting.

Problems that the invention aims to solve For example, when transferring a workpiece processed by a blanking press in the previous process to a transfer press in the next process, the workpiece is longer in the feed direction than in the width direction. If , planking
It is preferable to rotate the workpiece processed by a press by 90 degrees to make it suitable for processing with a transfer press.

In view of the above-mentioned circumstances, the purpose of this invention is to provide a device that can transfer a workpiece between both presses while arranging it so that it has a desired posture.

Means for Solving the Problems The device for aligning and transporting workpieces in a press line according to this invention includes a horizontal rotary plate arranged to span an unloading station from a press in the previous process and a loading station to the press in the next process; A rotating body provided at a predetermined distance from the rotation center of the rotating plate and having a vertical rotation center axis, and a pair of clamp claws attached to the rotation body and forming a pair on both sides of the rotation center axis of the rotation body. a drive device that intermittently drives a rotary plate so that the clamp sequentially stops at the carry-out station and the carry-in station; and an opening/closing device that opens and closes the clamp claws of the clamps stopped at the carry-out station and the carry-in station; The rotating device rotates the rotating body at a predetermined angle with respect to the rotary plate while the clamp moves from the carrying-out station to the carrying-in station, and reverses and returns the rotating body while moving from the carrying-in station to the carrying-out station. A fixed cam is disposed inside the movement path of the rotating body, and a cam follower is attached to the tip of a swinging arm fixed inward to the rotating body.

Function According to the workpiece alignment and transfer device of this invention, the clamp is attached to the rotating plate via the rotating body, and the driving device drives the rotating plate intermittently so that the clamp sequentially stops at the unloading station and the loading station. and an opening/closing device that opens and closes the clamp claws of the clamps that are stopped at the carry-out station and the carry-in station, so the workpiece processed by the press in the previous process can be processed by the clamp claws being opened and closed at the carry-out station. It is clamped by the clamp claw. While the clamp is moving from the unloading station to the loading station, the rotating device rotates the rotating body at a predetermined angle with respect to the rotating plate, and the clamp claws of the clamp form a pair on both sides of the rotation center of the rotating body. Therefore, the workpiece clamped by the clamp claws is rotated while moving along the moving path of the rotor by the rotating plate without deviating from the moving path of the rotating body. The clamp reaches the carry-in station, and the workpiece is unclamped by opening and closing the clamp claws at the carry-in station, and is carried through the carry-in station to the press for the next process.

Since the rotating device includes a fixed cam disposed inside the moving path of the rotating body and a cam follower attached to the tip of a swinging arm fixed inward to the rotating body, the rotation of the rotating plate is The cam follower, which follows the cam by rotation, swings the swinging arm, thereby rotating the rotating body.

Embodiments Hereinafter, embodiments of this invention will be described with reference to the drawings.

The layout of the press line is shown in FIGS. 1 and 2. This press line is for unwinding the coil material C, blanking it, and then transferring it. In FIGS. 1 and 2, the rewound coil material C is fed from left to right and advances.

Press 1 in this press line includes blanking press 2 and transfer press 3.
are integrated into the same frame. Both presses 2 and 3 are each equipped with dedicated slides 4 and 5, bolsters 6 and 7, etc., so that the blanking press 2 is located in front of the transfer press 3 in the feeding direction of the coil material C. It is located. FIG. 2 shows the bolsters 6, 7 of both presses 2, 3 arranged in a straight line and separated by a predetermined distance. Also, both slides 4 and 5
are driven synchronously by the same crankshaft (not shown). In the blanking press 2, blanking is performed by progressive processing, and the coil material C is cut into a rectangular workpiece W that is longer in the feed direction than in the width direction. In addition, in FIG. 2, a coil material feeding feeder 8 placed in front of the press 1, a conveyor 9 for carrying in extending from the feeder 8 toward the inside of the press 1, and a feeder of a transfer device provided in the transfer press 3 are shown.・
A bar 10, a discharge conveyor 11 extending outward from the press 1, and the like are shown. A workpiece alignment and transfer device 12 is arranged between the two bolsters 6 and 7 shown in FIG. 2, and therefore between the two presses 2 and 3.

As shown in FIGS. 3 to 5, the workpiece alignment and transfer device 12 includes an apparatus frame 13, a horizontal rotary plate 14, a drive device 15 for rotating the horizontal rotary plate 14, and a drive device 15 for rotating the horizontal rotary plate 14. A clamp 16 is attached to a position separated from the center by a predetermined distance and is openable and closable and rotatable about a vertical axis;
This device includes an opening/closing device 17 that opens and closes the clamp 16, and a rotating device 18 that rotates the clamp 16 by a predetermined angle with respect to the horizontal rotating plate 14.

The device frame 13 has a box shape with an open bottom, and is supported by the press frame via a pedestal 19 so as to be located above the transfer surface of the coil material C.

The drive device 15 includes a drive shaft 20 that extends vertically from above and has a lower end inserted through the device frame 13.
and an index 23 mounted on the upper surface of the device frame 13 so that the input shaft 21 is horizontal and the output shaft 22 is directed vertically downward. Drive shaft 20
are driven one-to-one by the crankshaft of the press 1. The index 23 is the index of the input shaft 21.
This is an intermittent drive in which the output shaft 22 makes one quarter rotation of 90 degrees for one rotation of 360 degrees, and there is a predetermined rotation stop time for each rotation of the output shaft 22. Input shaft 21 and drive shaft 20 of index 23
and are connected by a pair of meshing gears 24 and 25. Further, the output shaft 22 is inserted through approximately the center of the device frame 13, and its lower end portion protrudes slightly below the device frame 13. A horizontal rotary plate 14 is fixed to the lower end of the output shaft 13 at its center.

The horizontal rotary plate 14 is circular, and cylindrical portions 26 are formed on the circumference near the outer periphery at equal intervals of 90 degrees in an upwardly protruding shape. A thrust receiving roller bearing 27 and a radial receiving ball bearing 28 are fitted in the upper and lower parts of each cylindrical portion 26, and a cylindrical rotating shaft having an outwardly facing flange 29 at the lower end is rotated through these bearings 27 and 28. body 3
0 is rotatably supported.

The clamps 16 are left and right lever-shaped levers that are rotatably supported by a horizontal pin 32 via a support member 31 on the lower surface of the flange 29 of the rotating body 30. Gripping claw 33
have. The support member 31 has a vertically long long hole 34 formed therein. The horizontal pin 32 is fitted into this elongated hole 34 so as to be vertically movable. Further, a compression coil spring 35 is installed between the flange 29 of the rotary body 30 and the clamp 16 to constantly bias the support portion of the clamp 16 by the horizontal pin 32 downward.

The opening/closing device 17 includes a cam 36 for lifting and lowering the clamp.
and has a follower 37 of this cam 36 at the upper end,
and the lower end is attached to one end of the clamp 16 as the mounting member 16a.
and a lifting rod 38 connected via a horizontal pin 16b, one end of which is connected to the clamp lifting/lowering opening/closing cam 36 by a link 39, and the other end supported by the device frame 13 so as to be rotatable about a vertical axis. It includes a lever 40 and a lever swinging cam 41 that comes into contact with the middle part of the lever 40. The clamp lifting/lowering opening/closing cams 36 are surface cams having downward operating surfaces, and are mounted on the circumference of the annular support plate 42 at equal intervals of 180 degrees. This circumference has the same rotation radius as the circumference of the cylindrical portion 26 of the horizontal rotary plate 14. The support plate 42 is located at the top of the device frame 13, and is supported by the guiding cylindrical portion 13a of the device frame 13 so as to be rotatable around the index/output shaft 22, which is the center of rotation of the horizontal rotary plate 14. There is. The elevating rod 36 is a spline shaft of a ball spline, and is fitted into the housing 43 to guide its elevating and lowering. Housing 43
is fitted into the rotating body 30 and fixed.
The follower 37 is a bearing consisting of a large diameter ball 44 in contact with the cam 36, a plurality of small diameter balls 45 that support this ball 44, and a retainer 46 that holds these balls 44, 45. Further, a compression coil spring 47 is provided between the retainer 46 and the rotary body 30 to constantly push the lifting rod 38 upward.
It is attached via 0. The lever swing cam 41 is fixed to the lower end of the drive shaft 20, and although its detailed shape is not shown, it is a plate cam with convex portions formed on its outer circumferential surface at equal intervals of 90 degrees with respect to the base circle. .

When the lever swing cam 41 rotates along the drive shaft 20, the lever 40 swings and the link 3
9. The clamp lifting/lowering opening/closing cam 36 rotates via the support plate 42, thereby pushing down the lifting rod 38 via the follower 37. Elevating rod 3
6 descends, the clamp 16 follows this.
The horizontal pin 32 is guided through the elongated hole 34, and the clamp 16 is lowered while maintaining the closed state shown. As the lifting rod 38 further descends, the horizontal pin 32 reaches the lower end of the elongated hole 34.
Its descent is stopped and one end of the clamp 16 is pushed down. As a result, the clamp 16 rotates around the horizontal pin 32 and becomes open in a V-shape. By opening and closing the clamp 16 in this manner, the workpiece W is gripped by the claws 33 of the clamp 16 and released.

The rotating device 18 includes a cam 48 for changing the clamp direction.
and has a follower 49 of this cam 48 at one end,
It also includes an arm 50 whose other end is fixed to the upper end of the rotating body 30. Follower 49 to arm 5
A needle bearing 5 is attached to a vertical support shaft 52 which is rotatably attached to one end of 0 via a bush 51.
It is rotatably supported via 3. cam 48
are fixed to the device frame 13 above the horizontal rotary plate 14, facing each other at a predetermined interval, and concentrically with the center of rotation of the horizontal rotary plate 14. A tension coil spring 55 is attached between the tip of the arm 50 and the mounting boss 54 of the horizontal rotary plate 14 to bias the follower 49 against the cam 48 at all times.

FIG. 5 shows the detailed shape of the clamp direction changing cam 48. Also, in FIG. 5, the follower 49,
An arm 50 and a clamp 16 are each shown schematically.

The cam 48 is a combination of a plurality of circular arcs, including two large and small quarter circular arcs 57 and 58, which are concentric with the cam rotation center 10 and located diagonally below the right side and above the left side of the rotation center 56. Straight line portions 59 and 60 extending horizontally and vertically in contact with the arc 58;
It consists of two circular arcs 61, 62 that smoothly connect these straight portions 59, 60 and the large circular arc 57. The radius r of the large circular arc 57 is the maximum radius of the cam 48 and is slightly smaller than the radius R of the rotational circumference 63 of the cylindrical portion 26 of the horizontal rotary plate 14 . The radius of the cam 48 is constant in the portions of the two large and small circular arcs 57 and 58, and gradually increases and decreases in the portion connecting the two large and small circular arcs 57 and 58. Arm 5
0 is a state in which the follower 49 is in contact with a small circular arc 58 and is in a posture normal to the rotating circumference 63, and a state in which the follower 49 is in contact with a large circular arc 57 is in a posture in a tangent to the same circumference 63. becomes. Further, as the follower 49 moves from a small circular arc 58 to a large circular arc 57, the attitude of the arm 50 is changed from a normal line to a tangential line, and as the follower 49 moves from a large circular arc 57 to a small circular arc 58, the posture changes from a normal line to a tangential line. The pose is transformed from the normal to the normal.

The points where the horizontal line passing through the center of rotation 56 of the cam 48 and the rotational circumference 63 intersect are the loading/unloading stations S1 and S2 for the workpiece W. That is, the left side of the cam rotation center 56 is a workpiece carry-out station S1 from the blanking press 2, and the right side thereof is a workpiece carry-in station S2 to the transfer press 3. The follower 49 moves approximately counterclockwise from the unloading station S1 along the cam 48.
When the 90 degree advanced position is reached, the arm 50 is transformed from a normal to a tangential orientation as described above.
Due to this attitude change, the arm 50 moves to the horizontal rotating plate 1.
4, and 180 degrees relative to fixed parts such as the cam 48. When the follower 49 moves further and reaches the loading station S2, the arm 50 rotates 270 degrees with respect to the fixed part, but the arm 50 does not change its posture during this time, but with respect to the horizontal rotation plate 14. remains rotated 90 degrees. The clamp 16 is
Since it is fixed to the arm 50 via the rotating body 30, it moves according to the arm 50 and changes its posture.

The horizontal rotary plate 14 is
Rotated every 90 degrees, and horizontal rotation plate 14
When each of the clamps 16, which are attached at equal intervals of 50 degrees, reaches the carry-out station S1 and the carry-in station S2, rotation is stopped for a certain period of time. When the horizontal rotation plate 14 stops rotating, the clamp 16 is opened and closed as described above by the opening/closing device 17,
At the unloading station S1, the workpiece W sent by the blanking press 2 is placed in the clamp 1.
The workpiece W, which has already been supported by the clamp 16 at the carry-in station S2, is released from the clamp 16 and supplied to the transfer press 3. The workpiece W supported by the clamp 16 at the carry-out station S1 is transferred from the carry-out station S1 to the carry-in station S2 by the horizontal rotating plate 14 rotating 180 degrees by rotating twice by 90 degrees. During the transfer, the rotating device 18 rotates 90 degrees relative to the horizontal rotating plate 14 as described above.

In this way, the workpiece W processed into a rectangular shape that is longer in the feed direction than in the width direction by the blanking press 2 is transferred from the blanking press 2 to the transfer press 3, and rotated 90 degrees during transfer. As a result, they are arranged in a posture that is long in the width direction and short in the feed direction, which is convenient for processing by the transfer press 3.

Effects of the invention According to this invention, by clamping the workpiece with the clamp claws of the clamp and rotating the rotary plate and rotating body, the workpiece can be aligned in the desired posture between both presses. In addition, the workpiece clamped by the clamp claw is rotated while moving along the moving path of the rotating body by the rotating plate without deviating from the moving path of the rotating body, so the rotation of the clamp claw by the rotating body is prevented. Since the position of the workpiece at both stations is constant regardless of the magnitude of the angle, the same rotation angle can be set to any size. It is easy to adjust the posture to be convenient for processing.

Furthermore, the rotating body is rotated by the cam follower, which follows the cam as the rotating plate rotates, and swings the swinging arm, so the rotating body can be rotated without the need for an external actuator. . In addition, since the cam is located inside the rotating body movement path and the cam follower is attached to the tip of the arm fixed inward to the rotating body,
The rotating device is not particularly bulky, and the workpiece alignment and transfer device as a whole becomes compact.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG.
FIG. 2 is a side view showing the arrangement of the press line; FIG. 2 is a horizontal sectional view taken along the - line in FIG. 1; FIG. 3 is a perspective view showing the external appearance of the workpiece alignment and transfer device;
FIG. 4 is a vertical cross-sectional view of the device, and FIG. 5 is a plan view showing the detailed shape of the clamp direction changing cam. 2,3...Press, 14...Rotary plate, 15...
Drive device, 16... Clamp, 17... Switching device, 18... Rotating device, 30... Rotating body, 33...
...Clamp claw, 48...Cam, 49...Cam follower, 50...Arm, S1...Carry-in station, S2...Carry-out station.

Claims (1)

[Claims for Utility Model Registration] Unloading station S1 from press 2 in the previous process
and a horizontal rotary plate 14 disposed so as to straddle the loading station S2 to the press 3 for the next process; and a rotary body 30 provided at a predetermined distance from the rotation center of the rotary plate 14 and having a vertical rotation center axis. and a clamp 16 that is attached to the rotating body 30 and has a pair of clamp claws 33 on both sides of the rotation center axis of the rotating body 30, and the clamp 16 is configured to sequentially stop at the unloading station S1 and the loading station S2. A drive device 15 that intermittently drives the rotary plate 14, and a clamp claw 3 of the clamp 16 that is stopped at the carry-out station S1 and the carry-in station S2.
an opening/closing device 17 for opening and closing 3; and a rotating body 17 for rotating the rotating body 30 at a predetermined angle with respect to the rotary plate 14 while the clamp 16 is going from the carrying-out station S1 to the carrying-in station S2, and for rotating the rotating body 30 at a predetermined angle with respect to the rotary plate 14 while the clamp 16 is going from the carrying-in station S2 to the carrying-out station S1. The rotating device 18 includes a fixed cam 48 disposed inside the moving path of the rotating body 30 and a swinging arm 50 fixed inwardly to the rotating body 30. A device for aligning and transferring workpieces in a press line, comprising a cam follower 49 attached to the tip.