JPH01321152A - Jig bogie with externally set clamp driving source - Google Patents

Abstract

PURPOSE:To eliminate the need for connecting/disconnecting an air feeding device or a power feeding device to a bogie on the outside of a track and ensure clamping by driving a clamp device installed on the bogie by means of a clamp opening/closing device provided on the outside of the track. CONSTITUTION:As an empty bogie 1 is sent to a product setting position on a tack 2, a workpiece W is lowered and placed on the product receiving block 32 of a clamp device 3. Then, by contracting the air cylinder 44 of a clamp opening/closing device 4, a second link 37 is rotated counterclockwise through an opening/closing arm 43 via a roller 38, rotating a product retainer arm 34 counterclockwise via a first link 35 to hold the flange of the workpiece W toward the product receiving block 32. Then, the air cylinder 44 is expanded to return the opening/closing arm 43. As the final process is over and the bogie 1 arrives at a product take-out position, the air cylinder 44 of the clamp opening/closing device 4 is operated to separate the product retainer arm 34. Thereby, the structure of the bogie can be simplified while surely holding the workpiece.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a jig truck in which a clamp device fixed to a truck running on a track is operated by a drive source installed outside the track.

[Prior Art] Conventionally, in order to place and transport a workpiece on a trolley running on a track, a clamp device is attached to the trolley,
Accordingly, a jig cart is used to position and hold the workpiece. As shown in FIG. 8, the jig cart has a plurality of clamp devices attached to the upper surface of the truck frame a, and actuators C such as air cylinders are respectively attached to actuate these clamp devices. ing. In addition, an air pipe d and a control valve e are provided for operating these actuators C, and a wiring g for transmitting a signal from a sensor f for detecting the operating state of the actuator C or the control valve e is provided. Wiring and the like for sending a signal to operate the valve e are provided. Furthermore, an air coupling device j connected to an air supply device i provided outside the track for supplying air to the air pipe d;
An electrode plate l is provided which is connected to a power supply device k provided outside the track in order to transmit the electrical signals of the wirings g and h. The air supply device 1 and the power supply device are configured to be able to come into contact with and separate from the air coupling device j and the electrode plate 1, respectively, by the operation of an air cylinder m.

[Problems to be Solved by the Invention] In the conventional jig cart as described above, an actuator C for actuating the clamp device is provided on each cart, and a sensor f for actuating the actuator C is provided. , air piping d, control valve e, and electrical wiring g and h are all attached to the bogie, and an air supply device i and a power supply device k are provided outside the track.
air coupling device j and electrode plate l connected to
Since it is necessary to provide the above, there are many sources of failure and the reliability of the trolley decreases.

In addition, these actuator C, sensor f, control valve e, piping d, wiring g, h, etc. are often located below the workpiece, and the cart is surrounded by other processing equipment, so There were problems with maintenance workability and safety in the event of a failure.

Furthermore, the actuator C, sensor f, control pulp e, etc. must be installed on each truck, which increases the cost of manufacturing the truck.

Therefore, this invention eliminates the need to install actuators and sensors on the bogie by driving the operation of the clamp device by an actuator provided outside the track, and accordingly, air piping, electrical wiring, It is no longer necessary to install control valves, etc. on the trolley, making it possible to manufacture a jig trolley at a low cost that is less prone to breakdowns, has excellent maintenance workability, and is safe.

[Means for Solving the Problems] As a means for achieving the above object, this invention has the following features:
In a jig trolley in which a clamping device is fixed to the upper surface of a trolley running on a track, and a workpiece is positioned and held by this clamping device, the clamping device is attached to a product holder on which the workpiece is placed. This product holder consists of a block, a product holding arm that clamps a part of the workpiece between the block, and a toggle link mechanism that drives this arm, while the outside of the track corresponds to the clamping device. A clamp opening/closing device consisting of an actuator such as an air cylinder device and a clamp opening/closing arm driven by the actuator is installed, and when the actuator operates, the clamp opening/closing arm and one end of the link of the toggle link mechanism come into contact with each other. The product holding arm is opened and closed by operating a toggle link mechanism.

Further, as a second invention described in claim (2), there is provided a jig cart in which a clamp device is fixed to the upper surface of the cart running on a track, and a workpiece is positioned and held by the clamp device. , the clamp device includes a product holder on which the workpiece is placed, a block, and a product holding arm that clamps a part of the workpiece between the product holder and the block;
It consists of a toggle link mechanism that drives this arm, and a push-pull cable that has one end connected to one end of the link of this toggle link m structure and the other end of which is slidably held with the other end facing the edge of the truck. On the other hand, a clamp opening/closing device driven by an actuator such as an air cylinder device is installed outside the track in correspondence with the other end of the push-pull cable of the clamping device, and when the actuator operates, the clamp opening/closing device and the The product holding arm is opened and closed by sliding the push-pull cable with the other end of the push-pull cable in contact with the other end of the push-pull cable.

[Examples] Examples of the present invention will be described below with reference to the drawings.

First, FIGS. 1 to 3 show a first embodiment of the present invention. In the drawings, 1 is a truck running on a track 2, and a workpiece W is positioned and held on the upper surface of this truck 1. A plurality of clamp devices 3 are fixedly attached thereto. This clamping device 3 is installed almost vertically by a base plate 31 fixed to the top surface of the cart 1, and the product holder whose upper end surface is a surface for receiving the workpiece W is a block 32. a product holding arm 34 which is pivotally connected to the workpiece W by a free end thereof and the receiving surface of the block 32 for holding the flange of the workpiece W between its free end and the receiving surface of the block 32;
A first link 35 has one end pivotally connected to the rear end of the product holding arm 34, and a support shaft 36 has one end pivotally connected to the other end of the first link 35, and an intermediate portion bent in a substantially dogleg shape.
Accordingly, the product receiver is composed of a toggle link a and a second link 37 pivotally connected to the book 32.

A roller 38 is rotatably supported at the other end of the second link 37, and this other end and the product holder are connected to the book 3.
A spring 39 is stretched between the two.

On the other hand, on the outer side of the track 2, a plurality of clamp opening/closing devices 'W, 4 are installed corresponding to the clamp devices 3. This clamp opening/closing device 4 is a rail! ! A clamp opening/closing arm 43 whose intermediate part bent in a box shape is swingably supported by a shaft 42 is attached to the upper end of a base plate 41 erected on the outside of 2, and the tip of a piston rod 441 is connected to the clamp opening/closing arm 43. The cylinder body 44 is pivotally connected to one end and
2 and an air cylinder device 44 pivotably supported on the base plate 51. The air cylinder device 44
A piston rod 441 is installed on the outer surface of the cylinder body 442.
a position sensor 45.4 for detecting the forward/backward position of the crank 717fl and the operating state of the closing arm 43 of the crank 717fl;
6 is installed. The other end of the clamp opening/closing arm 43 is arranged so as to be able to come into contact with the roller 38 of the second link 37.

Next, the operation of the first embodiment of the invention configured as described above will be explained.

First, regarding the conveyance line using the jig cart of this invention,
To explain based on FIG. 4, an intermittent feeding device (not shown) is provided so that the cart is transported from right to left on the track 2 in the drawing, and the right end of the track 2 is connected to the workpiece. The left end is set as the product setting position for placing the workpiece, and the left end is set as the product takeout position for taking out the workpiece from the trolley, and multiple processing steps for processing the workpiece are provided in the middle of these positions. ing. Further, at the product take-out position, a cross-feeding device 5 is provided in a direction perpendicular to the track 2, and the cart, which has been empty after the workpiece has been taken out at the product take-out position, is shifted from the track 2. A transport line 6 which is parallel to the transport line 2 and sent in the opposite direction is placed on the soil, and a transverse transport device 7 is also provided at the product setting position in a direction perpendicular to the track 2, and the empty carts sent by the transport line 6 are placed on the soil. It is configured to be placed on orbit 2.

A clamp opening/closing device 4 is installed on the outer side of the track 2 in correspondence with the clamp device 3 on the upper surface of the trolley 1 at the product setting position and the product take-out position.

After the empty cart is sent to the product setting position on the track 2 by the cross-feeding device 7, the workpiece W is suspended from above, and the product receiver of the clamp device 3 is placed on the surface of the block 32. It will be placed. After the workpiece W is placed, the air cylinder device 44 of the clamp opening/closing device 4 is activated, and when the piston rod 441 retreats from the state shown in FIG. 2 as shown in FIG. 3, the clamp opening/closing arm 43 rotates clockwise in the drawing, and this clamp opening/closing arm 43
The upper end contacts the roller 38 at the lower end of the second link 37 of the clamping device 3, causing the second link 37 to rotate counterclockwise. By rotating the second link 37 in the counterclockwise direction, the product holding arm 3 is
4 in the counterclockwise direction, and press the product holding arm 34.
The tip of the product receiver and the receiver surface of the block 32 sandwich the flange of the workpiece W. As a result, the workpiece W
is positioned on the trolley 1 and held securely. The fact that the seven lunges of the workpiece W are clamped by the product holding arm 34 is due to the position sensor 4 of the air cylinder device 44.
Detected by 6. The workpiece W is clamped by the clamp device 3.
After it is confirmed that the air cylinder device 44 is held, the air cylinder device 44 is operated again to advance the piston rod 441, and the clamp opening/closing arm 43 is rotated counterclockwise to return to the original position shown in FIG. Return to At this time, the tip of the clamp opening/closing arm 43 only moves away from the roller 38 at the lower end of the second link 37 of the clamping device, but the second link 37 is not operated. Since the second link 37 is urged to rotate counterclockwise, the workpiece W continues to be held by the clamping device 3.

After confirming that the workpiece W is securely held, the intermittent feed device is activated and the cart 1 is sent to the processing step. After the final processing step, the cart has arrived at the product take-out position. Sometimes, the air cylinder device 4 of the clamp opening/closing device 4
4 to open the product holding arm 34 of the clamping device 3 on the trolley 1, and lift the workpiece W onto the trolley 1.
The empty cart 1 to be taken out from above is sent to a forwarding line 6 by a cross-feeding device 5, and by this forwarding line 6, a cross-feeding device 7 provided at a product setting position is moved in a direction opposite to the conveyance direction of the track 2. will be returned to.

As described above, the workpieces W placed on the cart 1 are sequentially processed in the processing steps on the track 2, and the empty cart 1 is set as a product by the traversing device 5.7 and the forwarding line 6. It is returned to the position and the next workpiece W is placed thereon.

Next, a second embodiment shown in FIGS. 5 to 7 will be described. Note that parts having the same functions as those in the first embodiment described above are given the same reference numerals and will be explained.

First, the clamping device 3 is connected to a board 3 erected on the upper surface of the trolley 1.
A product receiver fixed to the upper end of the block 32 and having a surface formed thereon is a receiver for receiving the U-shaped cross-section member of the workpiece W, and this product receiver is fixed to the upper end of the block 32 by a shaft 33. The product holding arm 34 which clamps the member of the workpiece W between the free end and the receiving surface of the block 32 is pivoted so as to be able to swing freely, and the product holding arm 34 has one end attached to the upper end of the product holding arm 34. a first link 35 that is pivotally connected to the roller 35 that is rotatably pivotally connected to the other end of the first link 35;
a and a slot 32b formed vertically in the support member 32a and into which the roller 35a is slidably fitted; one end connected to the other end of the first link 35; As shown in FIG.
The push-pull cable 8 is slidably held by a holding member 81 facing the edge of the push-pull cable 8. moreover,
The tip of this push-pull cable 8 is connected to an engagement plate 82.

On the other hand, the clamp opening/closing device 4 installed on the outside of the track 2 is fixed to a first air cylinder device 44a held at the upper end of the base plate 41 and to the tip of the piston rod 441a of the first air cylinder device 44a. Shina support member 443
It is comprised of a second air cylinder device 44b that is pivotally supported to be swingable, and a clamp arm 47 that is operated by the second air cylinder device 44b. As shown in FIGS. 6 and 7, this clamp opening/closing device 4 includes an engagement plate 82 at the tip of the push-pull cable 8 of the clamp device 3.
and the tip of the piston rod 441a of the first air cylinder device 44a are installed so as to face each other.

Then, by pushing the engagement plate 82 with the tip of the piston rod 441a of the first air cylinder device 44a,
The product holding arm 34 of the clamping device 3 can be closed via the push-pull cable 8 . In addition, the second air cylinder device 44b is operated, and the clamp arm 4
7 and the piston rod 4 of the first air cylinder device 44a
The product holding arm 34 of the clamping device 3 can be opened via the push-pull cable 8 by holding the engagement plate 82 between the tip of the clamping device 41a and retracting the piston rod 441a of the first air cylinder device 44b.

The second embodiment configured as described above also operates in exactly the same way as the first embodiment described above.

Furthermore, according to this second embodiment, since the clamp opening/closing device 4 is engaged with the push-pull cable 8, the clamp opening/closing device 4 can be installed at any position outside the track 2. I can do it.

In addition, by centrally holding the other ends of the push-pull cables 8, each of which has one end connected to a plurality of clamp devices 3, and connecting their tips to a single engagement plate 82,
Multiple clamp devices 3 by one clamp opening/closing device 4
can be driven simultaneously.

[Effects of the Invention] According to the present invention configured as described above, the clamp opening/closing device for driving the clamp device installed on the bogie is provided on the outside of the track, so that the actuator, There is no need to install position sensors, air piping, electrical wiring, control valves, etc.

Therefore, there is no price increase in manufacturing the trolley, and there is no source of failure, which is extremely advantageous in terms of maintenance costs.

Further, since there is no need to connect and separate the air supply device and the power supply device between the trolley and the outside of the track, unlike in the past, the workpiece can be reliably held by the clamp device.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention. FIG. 1 is a perspective view showing the main parts of the jig cart of the invention, and FIG. 2 is a state in which the clamp device is opened. A side view showing the
Figure 3 is a side view showing the clamp device in a closed state;
The figure is a schematic plan view of a conveyance line using a jig cart according to the present invention. Figures 5 to 7 show a second embodiment of the present invention. Figure 5 is a side view of a clamping device, and Figure 6 The figure is a side view of the tip of the push-pull cable of the clamp device.
FIG. 7 is a side view of the clamp opening/closing device, and FIG. 8 is a perspective view showing the main parts of a conventional jig cart. 1... Bogie, 2... Track, 3... Clamp device. 32...Product holder is block, 32b...Slot hole,
34...Product holding arm, 35...1st link, 35a...roller, 37...2nd link, 3...spring, 4...clamp Opening/closing device, 43... Clamp opening/closing arm, 44.4a, 4
4b...Air cylinder device, 8...Push-pull cable, W...Workpiece.

Claims (4)

[Claims] (1) A jig trolley in which a clamping device is fixed to the upper surface of a trolley running on a track, and a workpiece is positioned and held by this clamping device. a product holding block that clamps a part of the workpiece with the product holding block, and a toggle link mechanism that drives this arm; A clamp opening/closing device consisting of an actuator such as an air cylinder device and a clamp opening/closing arm driven by the actuator is installed correspondingly, and the operation of the actuator causes the clamp opening/closing arm to connect with one end of the link of the toggle link mechanism. A jig trolley externally installed with a clamp drive source, characterized in that the product holding arm is opened and closed by contacting the product holding arm and operating a toggle link mechanism. (2) In a jig trolley in which a clamping device is fixed to the upper surface of a trolley running on a track, and a workpiece is positioned and held by this clamping device, the clamping device is fixed to the upper surface of a trolley on which the workpiece is placed. a product receiving block, a product holding arm that holds a part of the workpiece between the product receiving block, a toggle link mechanism that drives this arm, and one end connected to one end of the link of this toggle link mechanism. a push-pull cable held slidably with its other end facing the edge of the truck; A clamp opening/closing device driven by an actuator such as the above is installed, and when the actuator operates, the clamp opening/closing device and the other end of the push-pull cable come into contact and slide the push-pull cable, thereby holding the product holding arm. A clamp drive source externally installed jig trolley, characterized in that it can be opened and closed. (3) In the clamping device, a turnover spring for maintaining the open/closed state of the product holding arm is stretched between the product receiving block and one end of the link of the toggle link mechanism. Externally installed jig trolley with clamp drive source. (4) The clamp drive source externally installed jig trolley according to claim 2, wherein the other ends of a plurality of push-pull cables respectively connected to the plurality of clamp devices on the upper surface of the trolley are held in a concentrated and slidable manner. .