JPS6331791Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a transfer feeder clamp drive device that uses a DC servo motor for power.

Conventionally, a transfer press is equipped with a transfer feeder for conveying a workpiece, and the drive source for this transfer feeder is obtained from the press body via a mechanical interlocking mechanism. For this reason, a complicated interlocking mechanism is required, which is generally expensive, and there is also the problem that the stroke cannot be easily changed.

This idea was made with the aim of improving this problem, and by using a DC servo motor as the drive source, a complicated interlocking mechanism was unnecessary, thereby simplifying the configuration and reducing cost, as well as reducing the stroke. It is an object of the present invention to provide a clamp drive device for a transfer feeder that is easy to change.

An embodiment of this invention will be described below with reference to the drawings. Figure 1 is an overall view of the transfer press and its peripheral equipment. A day stacker 3 in which works 2 are stacked is provided on the work loading side of the press body 1, and the works 2 are transferred one by one from this day stacker 3 to a magnetic conveyor. 4 and carried into the press body 1. Two transfer bars 5, 5' are provided on the press body 1 so as to be movable in the feed direction, lift direction, and clamp direction along the conveyance direction of the workpiece 2. are transported sequentially,
These transfer bars 5, 5' are driven in each direction by a drive device shown in Figures 2 and below. Next, to explain each drive device, a clamp box 10 is provided between the uprights 1a located on the workpiece loading side and the workpiece unloading side of the press body 1 (also between the central uprights 1a in the case of a three-post transfer press). A lift motor 11 consisting of a DC servo motor is installed at the lower part of one end of the clamp box 10. The lift motor 11 is interlocked with a gear shaft 13a via an endless timing belt 12, and a gear 13 provided on the gear shaft 13a is connected to a gear 1 provided on one end of a drive shaft 14.
It is meshed with 5. Reference numeral 16 denotes a lift frame housed in the clamp box 10 so as to be perpendicular to the transport direction of the workpiece 2, and has guide posts 1 on both ends.
7, 17' are installed upright. Each of the guide posts 17, 17' is supported by a roller 18 provided on the side of the clamp box 10, and guides the vertical movement of the lift frame 16, and also forms an endless timing on the inner surface of one guide post 17. A portion of the belt 19 is fixed via a holder 20. The timing belt 19 is connected to the drive shaft 14
It is wound around pulleys 21 and 22 installed above the pulleys 21 and 22 and pulleys 23 and 24 installed vertically apart from each other approximately in the center between the respective guide posts 17 and 17'. Each pulley 23, 24 located centrally between each guide post 17, 17' is provided with another pulley 25, 26 adjacent thereto.
Each rotating shaft 24 of the pulleys 24 and 26 located on the lower side
Gears 27 and 28 that mesh with each other are provided on a and 26a, and the rotation of the lift motor 11 is reversed and transmitted to the pulley 26. Further, pulleys 29 and 30 are provided adjacent to the guide post 17' provided on the opposite side of the lift motor 11, and these pulleys 29 and 30 and the pulley 25,
Another timing belt 31 is wound between the timing belts 26 and 26. A portion of this timing belt 31 is fixed to the guide post 17' via a holder 32.

On the other hand, a clamp motor 40 consisting of a DC servo motor is installed at the bottom of the other end of the clamp box 10. The clamp motor 40 is interlocked with a gear shaft 42a via a timing belt 41. A gear 42 provided on a gear shaft 42a meshes with a gear 44 provided on a drive shaft 43. And the pulley 4 provided on the drive shaft 43
5 and a pulley 4 provided above the lift motor 11.
An endless timing belt 46 is wound between 5', and a part of the upper side of the timing belt 46 is attached to a clamp carrier 47 located on the lift motor 11 side, and a part of the lower side is attached to the clamp carrier 47 located on the lift motor 11 side. They are each fixed to a clamp carrier 47' located on the side. Each of the above clamp carriers 4
7, 47' are supported on two guide rails 48 laid parallel to the lift frame 16 on the clamp box 10 via guide rollers 49 provided on both sides. Also, each carrier 4
7, 47' are provided with a pair of guide sleeves 50 so as to pass through them in the vertical direction, and a guide rod 51 is vertically slidable inside these guide sleeves 50.
is inserted. The lower ends of these guide rods 51 are fixed to carts 53, 53' which are movably supported by the lift frame 16 via rollers 52, and the upper ends of each guide rod 51 are fixed to carriers 53, 53'.
4, 54' is fixed to the bottom surface. And to these carriers 54, 54', transfer bar 5,
The lower part of the workpiece 5' is supported via a roller 55 so as to be freely movable in the transport direction of the workpiece 2.

On the other hand, the transfer bars 5, 5' are driven in the feed direction by the next feed drive device 60 installed on the workpiece loading side.

The feed drive device 60, as shown in FIG.
Feed boxes 61 and 6 are located on the side of the clamp box 10 installed between the uprights 1a.
1'. Feedbox 61,6
1' is divided into two from the center, and a feed motor 62 consisting of a DC servo motor is installed at the bottom of one feed box 61.
This feed motor 62 is interlocked with a drive shaft 64 via a timing belt 63. The drive shaft 64 is provided across each feed box 61, 61', and both ends are supported within the feed boxes 61, 61' via bearings 65, and pulleys 66 provided at both ends, the feed box 61, An endless timing belt 68, 68' is wound between a pulley 67 supported at the end of the data stacker 3 side of the belt 61'. Furthermore, guide rails 69 are installed on the upper surface of each feed box 61, 61' in the workpiece transport direction, and feed carriers 71, 71' are supported on these guide rails 69 through rollers 70 so as to be freely movable. , 71', carriers 74, 74' are supported via rollers 73 on guide rails 72 installed on the carriers 74, 71' so as to be movable in the approaching and separating directions. And these carriers 74,7
One ends of the transfer bars 5, 5' are fitted into pins 75, 75' vertically provided on the transfer levers 4' so as to be vertically slidable.

Next, each operation will be explained.

The lift operation of the transfer bars 5 and 5' is performed by rotating the timing belt 19 on the guide post 17 side via the timing belt 12 and gears 13 and 15 by the lift motor 11, and at the same time rotating the timing belt 19 on the guide post 17 side via the timing belt 12 and gears 13 and 15.
The timing belt 31 on the guide post 17' side, which is interlocked with the timing belt 8, is also rotated. This allows each timing belt 19, 31 to have a holder 20, 32.
The guide posts 17, 17' fixed through the guide posts 17, 17' move up and down to raise and lower the lift frame 16. The lift frame 16 supports carts 53, 53', and since these carts 53, 53' also move up and down, carriers 54, 54' connected to the carts 53, 53' via a guide rod 51 also move up and down. The transfer levers 5, 5' held by these carriers 54, 54' are moved up and down. The above is the lift operation of the transfer levers 5 and 5'.

Next, the clamping operation of transfer bars 5 and 5' is as follows:
Timing belt 41 by clamp motor 42
and the timing belt 4 via gears 42 and 44.
6 is rotated. The timing belt 46 has clamp carriers 47 and 4 on its upper and lower sides, respectively.
Since timing belt 7' is connected, timing belt 4
7,47', each clamp carrier 4
7 and 47' are moved in the approaching and separating direction along the guide rail 48, whereby each clamp carrier 4
Transfer bars 5, 5' supported on 7, 47' via guide rods 51 are moved in the clamping and unclamping directions.

On the other hand, to explain the feed operation of the transfer bars 5, 5', timing belts 68, 68' are rotated by a feed motor 62 via a timing belt 63 and a drive shaft 64. As a result, the feed carriers 71, 71' connected to the respective timing belts 68, 68' are connected to the guide rails 68, 68'.
9 in the feed direction, each carrier 7
4, 74' via pins 75 are driven in the feed direction.

The above is the movement of the transfer bars 5, 5' in each direction. The rotation of each motor 11, 40, 62 is controlled by the synchronization signal obtained from the press body 1, and is synchronized with the operation of the press body 1. The robot is now able to perform its respective actions.

As described in detail above, this invention connects clamp carriers that can move toward and away from the upper and lower sides of a timing belt that can be rotated by a clamp motor consisting of a DC servo motor, respectively. Since the transfer bar is supported at the rear, each transfer bar can be clamped by controlling the forward and reverse rotation of the clamp motor, and the mechanical interlocking mechanism with the press body and each transfer bar can be controlled by controlling the forward and reverse rotation of the clamp motor. Since no means for synchronizing is required, the configuration is simple and can be provided at low cost. In addition, the clamp stroke amount can be set by controlling the forward and reverse rotation of the lift motor, and since drive mechanisms such as racks and pinions are not used, it is possible to increase the speed, reduce noise during operation, and reduce the size of the press body. Even if the timing belt changes, this can be accommodated by simply changing the length of the timing belt, which is more economical and saves time in the short term because parts can be standardized compared to conventional designs where most of the parts had to be changed. It becomes possible to manufacture and assemble the product in between.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, with FIG. 1 being an overall view, FIG. 2 being a perspective view of the clamp and lift device, and FIG. 3 being a perspective view of the feed device. 2...Work, 5,5'...Transfer,
40... Clamp motor, 46... Timing belt, 47, 47'... Clamp carrier.

Claims (1)

[Scope of utility model registration request] Workpiece 2 to be formed by transfer press
A pair of transfer bars 5, 5' are arranged in parallel in the conveyance direction of the workpiece 2, and a rotatable endless timing belt 46 is connected to each transfer bar 5, 5 by a clamp motor 40 consisting of a DC servo motor. A clamp carrier 4 is stretched in a direction perpendicular to the timing belt 46 and supports the upper and lower sides of the timing belt 46 so as to be movable in the clamping direction of each transfer bar 5, 5'.
7 and 47', respectively, for a transfer feeder clamp drive device.