JPH04123823A - Transfer feeder - Google Patents

Abstract

PURPOSE:To allow the vacuum transfer for the work by mounting plural cross bars fitted with vacuum caps freely separably across between each transfer bar and also moving the transfer bar to the feed and lift directions. CONSTITUTION:A holder 7 to set both ends of the cross bar 5 on the transfer bar 3, and also the vacuum cup 9 to suck the work 8 at each cross bar 5 is provided. At the time of transferring the work 8 by setting a finger to each transfer bar 3, the transfer bar 3 is operated in the three-dimensional direction by a servo motor as the driving source. In the case of using the three dimensional transfer feeder for the vacuum transfer, each transfer bar 3 is operated in the two-dimensional direction of feed and lift directions. And the work 8 is sucked with the vacuum cup 9 set on the cross bar 5 mounted between each transfer bar 3 and successively transferred to the working station.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a three-dimensional transfer feeder that enables vacuum conveyance.

[Conventional technology]

Conventionally, transfer feeders installed in transfer presses have two methods: a pair of transfer bars that operate in three dimensions, each with fingers installed in opposition to each other, and these fingers clamp the workpiece and transport it to each processing station; A crossbar with a vacuum cup attached is placed horizontally between the transfer bars that move in the direction.
Some machines employ a vacuum conveyance method in which a vacuum cup sucks the workpiece and conveys it to each processing station.

[Problem to be solved by the invention]

However, the former method has drawbacks such as the inability to transport weak workpieces such as thin plates because they bend under their own weight, and the inability to transport workpieces that are taken in two pieces at the front and back during processing.

Furthermore, in the latter method, the operation of the transfer bar is complicated, so that the transfer speed cannot be increased and productivity is low.

The present invention has been made with the aim of eliminating the above-mentioned drawbacks, and is intended to provide a three-dimensional transfer feeder that enables vacuum conveyance.

[Means and operations for solving the problem] In order to achieve the above object, the present invention feeds, lifts, and moves a pair of transfer bars arranged in parallel in the workpiece conveyance direction by a drive mechanism using a servo motor as a drive source. In a transfer feeder that moves in a three-dimensional direction in the clamping direction to convey a workpiece to each processing station, a plurality of cross bars to which vacuum cups are attached are separated and freely suspended between the transfer bars, and the Vacuum conveyance is made possible by moving the transfer bar in two-dimensional directions of feed and lift directions.

This makes it possible to carry out vacuum transport using a 3D transfer feeder, making it possible to transport workpieces that cannot be transported using a 3D transfer feeder.
Crossbar using clamping action of transfer bar
Since it is possible to remove stones from the transfer bar, there is no need to provide an actuator for removing and removing the crossbar from the transfer bar.

〔Example〕

An embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, reference numeral 1 denotes a moving bolster provided in a transfer press (not shown), which can be moved in and out of the press body, and a plurality of molds 2 are mounted on the top surface in the workpiece conveyance direction (arrow A). They are placed at equal intervals.

Reference numeral 3 denotes a pair of transfer bars provided above the moving bolster 1, which are arranged in parallel to the workpiece conveyance direction A, and fingers 4 or cross bars 5 are attached to and removed from positions opposite to the transfer bars 3. It can be installed freely.

Each of the transfer bars 3 is driven in the three-dimensional directions of feed, lift, and clamp directions by a drive mechanism (not shown) using a servo motor as a drive source, and a cross bar is provided between each transfer bar 3. 5 is mounted horizontally, it is also driven in the two-dimensional direction of the feed and lift directions.

Each transfer bar 3 has a central bar 32 and both end bars 3.
1.33, each bar 31 to 33
The space between the two is removably connected by a bar connector (not shown), and when replacing the mold 2, the bar holder installed upright from the moving bolster 1 is connected with the central bar 32 placed on the stand 6. , the moving bolster 1 and the central bar 32 can be pulled out from inside the press body.

On the other hand, a holder 7 is installed on the transfer bar 3 to attach both ends of the cross bar 5 to the transfer bar 3, and a vacuum cup 9 for sucking a work 8 is attached to each cross bar 5.

Further, on the moving bolster 1 on which the molds 2 that use vacuum conveyance are placed, a crossbar holder 0 is erected so as to be located between the molds 2.

Next, to explain the operation, when the workpiece 8 is conveyed by attaching the fingers 4 to each transfer bar 3 as shown in FIG. 1, the transfer bar 3 is moved to the It is operated in three-dimensional directions as shown in Figure 2.

As a result, the workpieces 8 clamped between the fingers 4 are sequentially transported to the next processing station.

In addition, if the fingers 4 are to be replaced by external setup when replacing the mold 2, the transfer bar 3 is separated as shown in FIG. Just pull it out from inside the press body.

On the other hand, when the three-dimensional transfer feeder is used for vacuum conveyance, each transfer bar 3 is moved in two-dimensional directions as shown in FIG. 5 by a drive mechanism (not shown).

Then, a vacuum cup 9 provided on a cross bar 5 placed horizontally between each transfer bar 3 attracts the workpieces 8 and sequentially transports them to a processing station.

In addition, when replacing the cross bars 5 by external setup when replacing the mold 2, first lower the transfer bars 3 from the stopped state of the press body shown in FIG. 5 is placed on a stand 10 as shown in FIG.

By moving each transfer bar 3 in the unclamping direction in this state, the cross bar 5 is removed from the holder 7 provided on the transfer bar 3, so that the transfer bar 3 and the cross bar 5 can be separated. The cross bar 5 can be attached and detached without providing the transfer bar 3 with an actuator for attaching and detaching the cross bar 5 as in the conventional vacuum transfer type transfer feeder.

After separating cross/<-3 from transfer bar 3,
Move each transfer bar 3 onto the bar holder 6 as shown in FIG. The bar 32 may be pulled out from the press body together with the moving bolster 1 as shown in FIG. 9, and after the mold is replaced, the transfer bar 3 and the cross bar 5 may be connected by the reverse operation to the above.

〔Effect of the invention〕

As detailed above, this invention enables vacuum conveyance with a three-dimensional transfer feeder using a servo motor as a drive source, so it is possible to convey weak workpieces, which is difficult with a three-dimensional transfer feeder, and to take two pieces in the front and back. The transferred workpieces can be transferred by vacuum transfer, which further improves the versatility of the press, and by using a servo motor as the drive source, the change from finger transfer to vacuum transfer can be controlled. This can be implemented by simply changing the system software.

Also, when replacing the crossbar with external setup when replacing the mold,
Since the transfer bar and crossbar can be attached and detached using the movement of the transfer bar in the clamping direction, there is no need to install an actuator on the transfer bar to attach and detach the crossbar, unlike in conventional vacuum conveyance.
As a result, the weight of the transfer bar can be reduced, and the capacity of the drive mechanism for driving the transfer bar can also be reduced.

Furthermore, the negative pressure used in the vacuum cup during vacuum transfer can be easily obtained using a venturi using air to connect the transfer bar, so there is no need for a vacuum pump like in conventional vacuum transfer, and equipment This will allow for simplification.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view of the state in which it is used as a three-dimensional transfer feeder, and FIG. 2 is an explanatory diagram showing the operation when the same is used. Fig. 3 is an explanatory diagram of the mold exchange during the same use, Fig. 4 is a perspective view during vacuum conveyance, Fig. 5 is an explanatory diagram of the operation during the same use, and Figs. 6 to 9 are an explanatory diagram of the same use. FIG. 3 is an explanatory diagram of the effect when replacing the mold at the time of the mold replacement. 3 is a transfer bar, 5 is a crossbar, 8 is a workpiece,
9 is a vacuum cup.

Claims (1)

[Claims] A transfer system that transports a workpiece 8 to each processing station by moving a pair of transfer bars 3 arranged in parallel in the workpiece transport direction A in three-dimensional directions such as feed, lift, and clamp directions by a drive mechanism using a servo motor as a drive source. In the feeder, a plurality of cross bars 5 to which vacuum cups 9 are attached are separated and horizontally suspended between each of the transfer bars 3, and the transfer bars 3 are moved in two-dimensional directions in the feed and lift directions. A transfer feeder that also enables vacuum conveyance.