JPH0242348Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a conveying device employed when, for example, a two-dimensional transfer press sequentially conveys workpieces to the next process using a feed bar.

Conventional technology In the conventional two-dimensional transfer press,
As seen in Japanese Unexamined Patent Publication No. 59-33042 and Japanese Utility Model Application No. 59-81539, a plurality of sets of clamp drive devices and clamp devices are provided for clamping the feed bar. In other words, the clamp drive device consists of separate motors, and by operating a pair of rack shafts using pinions that are interlocked with these motors, a cradle that supports the feed bar so as to be movable in the longitudinal direction can be moved. They are moved toward and away from each other in orthogonal directions.

Problems to be Solved by the Invention According to the above-mentioned conventional configuration, the left and right clamp devices are driven by separate motors, which causes problems such as unbalanced loads acting on these motors and responsiveness of the motor control system. “Misalignment” occurs in the stroke in the clamping direction. When this "misalignment" occurs, "kinks" occur between the guide member (roller, etc.) attached to the pedestal and the feed bar.
As a result, the feeding movement and clamping movement of the feed bar cannot be performed smoothly.

Means for Solving the Problems In order to solve the above problems, the conveying device according to the present invention includes a plurality of sets of a clamp drive device and a clamp device interlocked with the clamp drive device, and , a push/pull rod movable in a lateral direction perpendicular to the conveying direction in conjunction with the clamp drive device, a carriage to which the push/pull rod is connected, and a carriage attached to the carriage so as to be rotatable about a vertical axis. and a cradle that supports the feed bar so as to be movable in the longitudinal direction.

Effect: According to the configuration of the present invention, when a "shift" occurs in the clamping direction in the clamping device due to circumstances on the clamping drive device side, the cradle automatically rotates around the vertical axis relative to the carriage. , “misalignment”
will be absorbed.

Embodiment An embodiment of the present invention will be described below based on the drawings. In FIG. 1, the two-dimensional transfer press 1 includes a bed 2, an upright 3, a crown 4,
A pair of feed bars 6A and 6B consisting of a slide 5 and the like and arranged on both sides along the conveyance path are supported on the bed 2 side via a clamp device 7.
8 is a feeding device that moves the feed bars 6A, 6B back and forth (feeding, returning), and includes a timing belt 9 interlocked with a drive device, and this timing belt 9.
a carriage 11 that is reciprocally movable along the feed direction 10 in conjunction with the feed direction 10; a pair of movable bases 13 supported by the carriage 11 via rails 12 and movable in a lateral direction perpendicular to the feed direction 10; The feed bar 6 is vertically installed from these movable bases 13.
It is constituted by a pin 14 that is inserted through the starting ends of A and 6B so as to be able to move up and down relatively. As shown in FIG. 2, a clamp drive device 15 is disposed below the bottom surface 2a of the bed 2, and the clamp device 7 for supporting the feed bars 6A, 6B is disposed above the top surface 2b of the bed 2. Ru. The clamp drive device 15, as shown in FIGS. 2 and 5,
A frame 16 attached below the bottom surface 2a of the bed, a case 17 attached to the lower surface of this frame 16, and two vertical shafts 1 rotatably supported by this case 17.
8A, 18B, and a clamp that is interlocked and connected to these vertical shafts 18A, 18B via reduction gear mechanisms 19A, 19B, respectively, and is attached to the lower surface of the frame 16.
It is composed of DC servo motors 20A and 20B. At the upper ends of the vertical shafts 18A and 18B, there is a clamp transmission shaft 21 that passes through the bed 2 and is rotatable.
The lower ends of A and 21B are interlocked and connected. The clamp device 7, as shown in FIGS. 2 to 4,
A clamp reduction gear box 22 attached to a frame 37 disposed on the bed 2, and two vertical shafts 23 rotatably supported by the clamp reduction gear box 22.
A, 23B, pinions 25A, 25B interlockingly connected to these vertical shafts 23A, 23B via reduction gear mechanisms 24A, 24B, and these pinions 25
Push/pull rods 27A, 27B form racks 26A, 26B that engage with the racks 26A, 25B and are movable in the lateral direction perpendicular to the feed direction 10, and a pair of push/pull rods 27A, 27B to which the free ends of these push/pull rods 27A, 27B are connected Carriages 28A, 28B and these carriages 28
A guide rail 30 arranged on the frame 37 to support the rollers 29A and 29B attached to A and 28B
A, 30B, and vertical shafts 33A, 33B that extend through the center of the carriages 28A, 28B and are rotatable around the vertical axes 32A, 32B via bearings 31A, 31B, and these vertical shafts 33A, 33B. and a plurality of rollers 34A, 3
4B to support the feed bars 6A, 6B movably in the feed direction 10 (lengthwise direction), and the upper ends of the clamp transmission shafts 21A, 21B are connected to the vertical shaft 23.
It is interlocked and connected to the lower ends of A and 23B.

The action will be explained below. Feed bar 6A, 6
The approaching and separating movement (clamping and non-clamping) of B is performed by the clamping device 7, and since the movable base 13 moves relative to the rail 12 at this time, the interlocking state with the feeding device 8 is maintained. Furthermore, the reciprocating movement of the feed bars 6A and 6B (feeding and returning actions)
This is performed by reciprocating the timing belt 9 and reciprocating the carriage 11 along the feeding direction 10.

The clamp device 7 and the clamp drive device 15
Explain the relative action between The forward and reverse rotational forces of the DC servo motors 20A and 20B for clamping are reduced by reduction gear mechanisms 19A and 19B, and then transferred to the vertical axis 1.
Clamp transmission shafts 21A, 2 via 8A, 18B
1B, these clamp transmission shafts 21A,
Rotate 21B in forward and reverse directions. Further, the forward and reverse rotation of the clamp transmission shafts 21A and 21B is performed by the vertical shafts 23A and 23B.
and reduction gear mechanisms 24A, 24B.
is transmitted to pinions 25A and 25B via.
As a result, the push rods 27A and 27B are pushed and pulled through the racks 26A and 26B, and the carriages 28A and 27B are guided by the guide rails 30A and 30B.
Move 28B. This carriage 28A, 2
The movement of the feed bar 8B is transmitted to the pedestals 35A and 35B via the vertical shafts 33A and 33B, thereby moving the feed bars 6A and 6B toward and away from each other.

When the aforementioned feed bars 6A and 6B are moved toward and away from each other (clamping motion), the stroke in the clamping direction may be misaligned due to unbalanced loads acting on the DC servo motors 20A and 20B, responsiveness of the motor control system, etc. ” occurs, the cradle 35A, 35 is moved against the carriage 28A, 28B.
B automatically rotates around the vertical axes 32A, 32B, thereby absorbing "misalignment" and preventing "kinking" from occurring.

As described in the above embodiment, by arranging only the clamp device 7 on the bed 2 and arranging the drive device 15 of this device under the bed 2, this bed 2
The upper part can be simplified and made more compact, so the distance between the three uprights can be reduced, and
Space can be secured for easy maintenance. Further, the upper part of the drive device 15 is covered by the bed 2, which prevents oil such as lubrication from being applied, and the drive device 15 can always be expected to operate reliably as expected.

Effects of the invention According to the invention with the above configuration, when a "shift" in the clamping direction occurs in the clamping device due to circumstances on the clamping drive device side, the cradle automatically rotates around the vertical axis relative to the carriage. and “misalignment”
This prevents "kinks" from occurring between the pedestal and the feed bar.
The feeding movement and clamping movement of the feed bar can always be performed smoothly.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a front view, Fig. 2 is a partially cutaway side view of the main part, Fig. 3 is a view taken along arrow A-A in Fig. 2, and Fig. 4 is the same B-B
The arrow view and FIG. 5 are bottom views. 1... Two-dimensional transfer press, 6A, 6B
...Feed bar, 7...Clamp device, 8...
Feeding device, 15...Clamp driving device, 20
A, 20B...DC servo motor for clamp, 2
1A, 21B...Transmission shaft for clamp, 25A, 2
5B...Pinion, 26A, 26B...Rack,
27A, 27B...push/pull rod, 28A, 28B...
...Carriage, 29A, 29B...Roller, 30
A, 30B...Guide rail, 31A, 31B...
... Bearing, 32A, 32B ... Vertical axis, 33A, 3
3B...vertical axis, 35A, 35B...cradle.

Claims (1)

[Scope of utility model registration request] A plurality of sets of a clamp drive device and a clamp device interlocked with the clamp drive device are arranged, and the clamp device is movable in a lateral direction perpendicular to the conveyance direction in interlock with the clamp drive device. It is characterized by being composed of a push-pull rod, a carriage to which the push-pull rod is connected, and a pedestal that is rotatably attached to the carriage around a vertical axis and supports the feed bar so as to be movable in the longitudinal direction. conveyance device.