JPS5933571Y2 - Workpiece conveyance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an arm-swivel type workpiece conveyance device that automatically performs a workpiece removal hole in a machine tool such as a cylindrical grinder.

In a mass production factory, a method for transporting a workpiece sent by a conveyor to a machine tool includes, for example, a pair of loading/unloading devices each having a gripper running on a beam, or a single arm having a gripper. There are many different types, such as one in which a robot is used, and one in which a rotating arm receives the workpiece, and the most suitable type is selected depending on various constraints such as the layout of the tooling factory of the machine used.

Therefore, the present invention is installed as an accessory to the machine and can rotate between the workpiece delivery position and the processing position, and the small arm that has a support is transported by the arm that is pivoted, and the posture of the small arm is maintained constant during the transport. The object of the present invention is to provide a workpiece conveyance device that controls the movement of the workpiece and rotates the small arm to take a retracted position so as not to interfere during traverse grinding.

Embodiments of the invention will be described with reference to the drawings.

A headstock and a spindle (not shown) are fixed to the upper surface of a table 2 placed on a bed 1, and a workpiece 3 is supported between the centers.

A grindstone 4 fixed to a grindstone shaft on a grindstone head moves forward for processing, and the table 2 traverses to grind a workpiece 3 such as a stepped shaft or crankshaft.

A shaft 6 is supported on the upper part of a main body 5 of a workpiece conveying device installed on the front side of the grinding machine, and a rod 7 and a large gear 8 are each keyed to the shaft 6.

A cylinder end of a first driving device 10 of the first swing arm is pivotally supported on a bracket 9 that is also fixed to the lower part of the main body 5.

The tip of the piston rod 11 of the device 10 is connected to the rod 7.
is connected to.

The operation of the first drive device causes the large gear 8 to swing.

Further, a gear 13 is rotatably supported on a shaft 12 fixed to the top of the main body 5 in the same way as the shaft 6.

Bearings 14 and 15 are provided on the outer periphery of the boss of this shaft 12 and gear 13.
and a gear 16 which is supported by a shaft and meshes with the large gear 8,
A first pivot arm 17 integral with the gear 16 is provided.

A second rotating arm 19 having a receiver 18 at the tip of this arm 17
is pivotally attached to the first pivot arm 17 so as to be able to pivot independently within the same plane.

A gear 20 is fixed to the pivot base of the second pivot arm.

Furthermore, the sill end of the second drive device 22 of the second swing arm 19 is pivotally supported on a bracket 21 fixed to the middle of the main body 5.

The tip of the piston rod 23 of the device 22 is connected to the gear 13.
It is connected to a rod 24 that is fastened to the side of the boss.

A gear group 25 transmits the rotation of the gear 13, which is integrated with the rod 24 and is oscillated by the operation of the second drive device 22, to the gear 20.
are supported in a line along the longitudinal direction of the first swing arm 17.

Therefore, the number of teeth of gear 13, gear group 25, and gear 20 is the second
When the drive device is inactive, that is, when the gear 13 is in a fixed state, the first
The second swing arm is designed to swing in the opposite direction to the swing angle of the swing arm.

Therefore, the attitude of the second swing arm 19 is always the same with respect to the horizontal line, and the receiver 18 is rotated between the processing position and the delivery position while maintaining the state in which it receives the workpiece.

By the way, when the first drive device 10 is deactivated and the second drive device 22 is activated, since the first swing arm 17 is in a fixed state, only the gear 13 is rotated, and the second swing arm 19 is rotated by the gear group 25. rotated independently.

A transfer table 26 is provided at the transfer position at the upper front of the main body 5, and a stopper 27 whose position is adjustable in the axial direction is provided on the outside of the transfer table 26, so that the workpiece is positioned in the axial direction.

Furthermore, when the workpiece is a crankshaft, a regulating piece 2B is attached to the receiver 18 of the second swing arm 19 in order to always position the workpiece at a specific angle in relation to the driving member of the main shaft. 29 is provided to support the eccentric parts 30 and 31.

The aforementioned mechanism is arranged in pairs on the front surface of the grinding machine, and the respective shafts 6 are connected by a coupling 32, so that the rotating arms perform synchronous operation so that the workpiece is received by the two arms. There is.

The piston rod 11 of the complete set 1 drive device 10 is pushed up, and the first swing arm 17 is turned toward the workpiece transfer table 26 side.

The piston rod 23 of the second drive device 22 has also been pushed up, and the second swing arm 19 is waiting directly below the delivery table 26.

In this state, the workpiece 3 is transferred to the transfer table 26 automatically or manually.
It is carried upward and positioned in the axial direction by a stopper 27.

The first drive device 10 operates according to the command, and the piston rod 1
1 is subtracted.

Accordingly, the shaft 6 dog gear 8 is rotated.

When the gear 16 meshing with the large gear 8 is rotated around the shaft 12, the first rotating arm 17, which is integral with the gear 16, is rotated toward the processing side.

At this time, since no operation command is issued to the second drive device 22, the gear group 25 rotates around the fixed gear 130 while meshing with each other.

For this purpose, the gear 20 and the second pivot arm 19.7 are pivoted in the opposite direction to the first pivot arm.

The number of teeth in the gear 13, gear group 25, and gear 20 is specially calculated to be 5 so that the gear 20 rotates at the same angle in the opposite direction to the rotation direction of the first rotating arm 17.

Therefore, the second rotating arm 19 rotates to the right by the same angle as the first rotating arm 17 rotates to the left, and although the angular relationship between the two changes, the second rotating arm rotates with respect to the horizontal line regardless of the force. It always maintains a constant angle.

The receiver 18 of the second swing arm 19, which is maintained at a constant angle in this manner, stably receives the workpiece 3 and transports it from the transfer table 26 to the processing position between the two centers.

When the workpiece 3 is supported by both centers, the second drive 22 is activated by command.

The rod 24 and gear 13 are rotated by the piston rod 23 being pulled down.

As a result, the gear group 25 and the gear 20 are rotated, and the second rotating arm 19, which was receiving the workpiece at the processing position, is rotated independently in the same direction as the rotation during conveyance and retreated to just above the table.

During the processing operation, it remains in this state waiting for the next conveyance.

The second drive device 22 receives a signal indicating that the workpiece 3 has finished grinding.
piston rod 23 is pushed up.

This causes the rod 24 to pivot, and this rotation causes the gear 20 and second pivot arm 19 to pivot toward the workpiece via the gear 13 and the gear group 25.

When the receiver 18 is located directly below the workpiece, the first drive device 10 is pushed up by a command, and the first swing arm 1γ is turned toward the delivery money side.

At this time, since the second drive device 22 does not operate, the gear group 25
, gear 20, are rotated in the opposite direction to the previous conveyance.

As a result, the second rotating arm 19 conveys the workpiece to the transfer table 26 at a constant angle with respect to the horizontal line.

When the support 18 is provided with pieces 28 and 29 for regulating the posture of the workpiece, the eccentric portions 30 and 31 of the workpiece are received, and the fixed angle position of the workpiece at the delivery position is directly conveyed between the centers.
Further, after the processing is completed, the same angular state is maintained during transportation.

As explained above, since the configuration includes the second swing arm that can further independently swing at the tip of the first swing arm, the workpiece is transported and supported between the centers, and then the second swing arm is retracted downward. Because it can be used for traverse grinding of stepped shafts, crankshafts, etc., it does not interfere with the grindstone and does not interfere with the grinding work.

In addition, the second swing arm is rotated at the same angle and in the opposite direction as the first swing arm, so that the posture of the receiver during transportation is kept constant with respect to the horizontal line, so the receiver does not require a gripping claw or the like. Since a simple V-shaped pedestal is sufficient, the delivery operation is easy and trouble-free.

In addition, a workpiece posture regulating member is attached to the receiver of the second swing arm, so in the case of a crankshaft, for example, it can be received at a certain angle at the delivery position, held as it is, and transported, so it can be supported at both centers. When this is done, the relationship between the spindle and the spindle is always in a compatible state, and there is no need for an extra operation to rotate the workpiece to match it, and the machined crankshaft is transferred from the retracted position of the second rotating arm. It has the feature that it can be fixed at a fixed angle and transported by rotating.

In addition, if the above-mentioned second drive device 22 is made into a three-position movable type and the first swing arm 17 is in the delivery position, the second swing arm 19 is turned in the opposite direction to move the processed workpiece. It is also possible to emit it to the chute in the opposite direction to the grindstone.

[Brief explanation of drawings]

Figure 1 is a side view showing the retracted position of the device of the present invention in the workpiece machining state, Figure 2 is a side view similarly showing the standby position at the workpiece delivery position, and Figure 3 is the AA of Figure 1. FIG. 4 is a plan view showing the second swing arm in which a regulating member is provided on the receiver, and FIG. 5 is a sectional view taken along line BB in FIG. 4. 8...Large gear, 10...First drive device, 13°20...Gear, 17...First
Swivel arm, 18... Receiver, 19... Second
Swivel arm, 22...Second drive device, 25...
...Gear group, 28, 29...Regulation member.

Claims (1)

[Scope of utility model registration request] 1. In a workpiece transfer device that is installed on the front side of a grinding machine and uses a rotating arm to transport the workpiece between a delivery position and a processing position while holding the workpiece in the same state, a rotating arm that rotates between the workpiece delivery position and the processing position is used. a second swing arm that is pivotally attached to the tip of the first swing arm and has a workpiece pedestal and is able to swing independently within the swing plane of the first swing arm; and a second swing arm that pivots when the first swing arm rotates. The second rotating arm is controlled to rotate in the opposite direction to keep the posture of the second rotating arm constant, and the second driving means independently rotates the second rotating arm. A workpiece transfer device characterized by a swinging arm that swings and retreats. 2. The workpiece conveyance device according to claim 1, wherein the second swing arm has a member for regulating the support angle of the workpiece.