JP2586958Y2 - Automatic crossbar attachment / detachment device for transfer feeder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically attaching and detaching a crossbar in a transfer feeder employing a vacuum transfer system.

[0002]

2. Description of the Related Art Conventionally, a transfer feeder adopting a vacuum transfer system has a plurality of crossbars suspended between transfer bars arranged in the work transfer direction.
Vacuum cups for adsorbing a work are attached to these crossbars. Also, since the position and height of the vacuum cup that absorbs this differs depending on the work to be conveyed, conventionally, every time the work changes, remove the vacuum cup with the crossbar from the transfer bar and replace it with a vacuum cup that matches the work. Therefore, as shown in FIG. 1, the tip of the support rod a attached to the transfer bar side is fitted to the end of the cross bar b so that the cross bar can be attached to and detached from the transfer bar. A structure in which both ends of the crossbar b are supported by pressing the rod a in the direction of the arrow is generally adopted.

[0003]

However, since the crossbar b is long and is easily bent, a structure in which the ends of the support rods a are fitted to both ends of the crossbar b to support the crossbar b as in the prior art. In this case, the bending of the crossbar b cannot be restricted. As a result, the cross bar b vibrates during conveyance,
In particular, there is a problem that misfeed occurs when a heavy work is conveyed or when the work is conveyed at a high speed. In addition, a support rod a
If the length of the spigot portion c is increased, the resistance of the crossbar b at the time of automatic connection increases, causing problems such as difficulty in automatic attachment and detachment. The present invention has been made to improve the above-described problem, and has as its object to provide an automatic crossbar attaching / detaching device in a transfer feeder in which the deflection of the crossbar is restrained and vibration during transport is reduced. is there.

[0004]

According to the present invention, in order to achieve the above object, a plurality of crossbar carriers are movably provided in a feed direction on a lift beam 1 juxtaposed in a workpiece conveying direction, and are mutually movable. between opposing crossbars carrier, in the transfer feeder which is laterally placed freely exchange the bar mounted with vacuum cups, to each <br/> crossbar carrier, is opened and closed by a cylinder actuated by fluid pressure, said Provided at both ends of the crossbar
Clamp mechanism with clamp claws for clamping the gripper
At the tip of the clamp claw and the gripper.
When clamping the holding part, engage the clamp claw with the gripping part
An engaging means is provided.

[0005]

[Operation] With the above configuration, the clamp claw is
When the grips at both ends are clamped, the engaging means
Engage the ramp pawl to restrain the crossbar from moving in the longitudinal direction.
Straining prevents crossbar vibration during workpiece transfer
Can be controlled.

[0006]

[Embodiment] An embodiment of the present invention will be described in detail with reference to the drawings shown in FIG. In FIG. 2, reference numeral 1 denotes a lift beam of a transfer feeder adopting a vacuum transfer system, which is arranged in parallel in the work transfer direction, and a plurality of crossbar carriers 2 are arranged on these lift beams 1 at equal intervals so as to be movable in the work transfer direction. It is installed in. The crossbar carriers 2 are connected by a feed carrier (not shown), and are simultaneously driven in the work conveyance direction. The crossbars 4 are interposed between the crossbar carriers 2 facing each other via the automatic attachment / detachment device 3 of the present invention. Is suspended.

The automatic attachment / detachment device 3 has support members 5 fixed on the crossbar carrier 2, and a cylinder 7 is rotatably supported in the support members 5 via a bearing 6. The rear end side of these cylinders 7 is
And a tilt cylinder (not shown) is connected to the end of the cylinder.
The crossbar 4 can be tilted via the.

A piston rod 7b is protruded from both ends of a piston 7a housed in the cylinder 7, and air is supplied via a rotary joint 8 from an end of the piston rod 7b protruding rearward. It has become. This air is supplied to the cylinder 7 from the passage 7c formed in the piston rod 7b.
When the piston 7a is supplied to the inside and presses the piston 7a forward, a clamping force is generated in the clamp mechanism 10 provided at the front end of the piston rod 7b. The clamp mechanism 10 has a pair of clamp claws 10 a in which a long hole 10 b formed on the base end side is pivotally attached to the front end of the cylinder 7 via a pin 11.

The tips of these clamp claws 10a are formed in a substantially concave cross section as shown in FIG.
c, gripping portions 4a formed at both ends of the cross bar 4 can be sandwiched between the gripping portions 4a and 4c.
A pin hole formed in the grip portion 4a is formed in the clamp claw 10a.
4b and a locate protruding from one clamp claw 10a
An engaging means comprising a pin 12 is provided,
When the claw 10a clamps the grip portion 4b, the pin hole 4b
The locate pin 12 is adapted to be engaged.

On the other hand, the clamp mechanism 10 has a pair of levers 10d whose bending portions are pivotally supported at the distal end of the cylinder 7 by pins 13. One end of each of the levers 10d is connected to the distal end of a clamp claw 10a by a pin 14. It is pivoted to the side. The other end of the lever 10d is pivotally connected to the front end of the piston rod 7b via a link 10e by a pin 15. The front end of the clamp claw 10a is centered on the pin 11 via the link 10e and the lever 10d. It can be opened and closed to the position shown in FIG.

Next, the operation will be described. When the crossbar 4 carried into the press by the moving bolster together with the mold (not shown) reaches a predetermined position, the crossbar 4 of the cylinder 7 is moved through a passage 7c formed in the piston rod 7b. Air is supplied to the rear chamber 7e. As a result, the clamp claw 10a, which has been opened as shown in FIG. 5, rotates the lever 10d about the pin 13 via the piston rod 7b and the link 10e to the position shown in FIG. Therefore, the tip of each clamp claw 10a is rotated around the pin 11 to clamp the grip 4a of the crossbar 4. The tip of each clamp claw 10a is formed to have a substantially concave cross section so as to clamp substantially the entire length of the grip portion 4a ,
Locating pin 12 projecting from clamp claw 10a of
The engagement with the pin hole 4b of the holding portion 4a allows the long crossbar 4 to be restrained from bending. Thus, the vibration of the crossbar 4 during the transfer of the work can be suppressed, so that a misfeed of a vacuum cup (not shown) attached to the crossbar 4 can be prevented.

In order to confirm the effect of the present invention, the vibration of the crossbar when the conventional crossbar attaching / detaching device and the crossbar attaching / detaching device of the present invention were used was measured at different speeds. 6 and FIG. 7 were obtained. FIG. 6 shows the conventional device, and FIG. 7 shows the device of the present invention. The effect of reducing the vibration in the lift direction where misfeed is likely to occur was confirmed.

[0013]

Effects of the invention] As this invention is described in detail above, cross
The clamping mechanism provided on both ends of the bar
And the engaging means engages the gripper with the clamp pawl.
Thus, the movement of the crossbar in the longitudinal direction is restricted, so that the vibration of the crossbar generated during the transfer of the work can be significantly reduced. As a result , work interruptions due to misfeeds are reduced , which improves press availability and
Cormorants improve productivity Hakare Rutotomoni, so also automatic replacement of the crossbar adoption of the clamping mechanism can be easily and reliably.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a conventional crossbar attaching / detaching device.

FIG. 2 is a partially cutaway plan view showing the automatic crossbar attaching / detaching apparatus according to one embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a view as seen from the direction B in FIG. 2;

FIG. 5 is an explanatory diagram at the time of unclamping of a clamp mechanism.

FIG. 6 is a diagram showing vibration of a crossbar by a conventional crossbar attaching / detaching device.

FIG. 7 is a diagram showing vibration of the crossbar by the automatic crossbar attaching / detaching apparatus according to one embodiment of the present invention;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lift beam, 2 ... Crossbar carrier, 4 ... Crossbar, 4a ... Holding part, 7 ... Cylinder, 10 ... Clamp mechanism, 10a ... Clamp claw.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B21D 43/05 B21D 43/18

Claims (2)

(57) [Scope of request for utility model registration] 1. A plurality of crossbar carriers 2 are movably provided in a feed direction on a lift beam 1 juxtaposed in a workpiece transfer direction, and a vacuum cup is mounted between crossbar carriers 2 facing each other. Crossbar 4
In the transfer feeder where the
In each cross bar carrier 2, to be opened and closed by a cylinder 7 which operates by a fluid pressure, both ends of the crossbar 2
Claws 10 for clamping the holding portions 4a provided on the
a and a clamp mechanism 10 having
Clamp the gripper 4a to the tip of the pump claw 10a and the gripper 4a.
At the time of pumping, the clamp claw 10a engages with the gripper 4a.
An automatic attachment / detachment device for a crossbar in a transfer feeder provided with engagement means . 2. The clamp claw 10a is formed to have a substantially concave cross-section at its tip, and the tip of the clamp claw 10a clamps substantially the entire length of the gripping portions 4a formed at both ends of the cross bar 4. Item 6. An automatic attachment / detachment device for a crossbar according to Item 1.