JP2571024Y2 - Crossbar swivel 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 crossbar turning device for a transfer feeder mounted on a transfer press.

[0002]

2. Description of the Related Art Conventionally, there is a transfer feeder provided in a transfer press employing a vacuum transfer system. In the transfer feeder adopting this vacuum transport system, both ends of the crossbar are supported on a lift beam that is moved up and down via a crossbar carrier, and suction means such as a vacuum cup for sucking a work to the crossbar is provided. which was provided, when unloading the part of the crossbar to press body out with the die by a die replacing a moving bolster, crossbar crossbar mounting portion so that the suction means attached to the cross bar does not interfere with the uprights Is provided with a crossbar swivel device for swiveling about 90 degrees. In the conventional crossbar turning device, for example, as shown in FIG. 1, an air cylinder c is rotatably supported via a bearing d in a support cylinder b installed on a transfer bar a. The end of the crossbar f is attached to the tip of a more protruding piston rod e. By rotating the air cylinder c by a rotation drive source g composed of a servomotor and a rotary actuator connected to the bottom side of the air cylinder c, the crossbar f can be turned.

[0003]

The turning device using a servo motor to the invention is to solve the above but rotational drive source g, at the time of only use expensive servo motor for economically to substantially 90 ° pivoting crossbar setup Unfavorable,
There were problems such as poor maintainability. In addition, the rotational drive source g
In a turning device using a rotary actuator, since the turning end of the crossbar f is regulated by a stopper in the rotary actuator, backlash in the crossbar f causes rattling of the crossbar f, causing misfeed, noise, and vibration. There is a defect that causes The present invention has been made in order to improve such a conventional problem, and has as its object to provide a crossbar turning device of a transfer feeder which does not cause backlash in the crossbar at low cost.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a plurality of crossbar carriers, which are arranged in parallel in the work transfer direction and are movable in the feed direction, with a lift beam movable up and down at a fixed interval. In a transfer feeder in which a crossbar to which a work suction means is attached is laid between the crossbar carriers, an air cylinder is rotatably provided on the crossbar carrier, and A crossbar is detachably mounted between the ends of piston rods protruding from the air cylinder, and a lever is fixedly connected to the air cylinder and a rotary drive source mounted on the crossbar carrier is connected via a link. In addition, a stopper is provided in the vicinity of the lever to define a crossbar turning range.

[0005]

[Work] With the above structure, the crossbar can be held at the turning end while the lever is pressed against the stopper, so that the crossbar does not rattle during the transfer of the work.

[0006]

[Embodiment] An embodiment of the present invention will be described in detail with reference to the drawings shown in FIG. FIG. 2 is a plan view of the crossbar turning device, FIG. 3 is a sectional view of the same, and FIG. In these figures, reference numeral 1 denotes a lift beam which is driven in the vertical direction, and a plurality of crossbar carriers 2 which are movable in the work transfer direction are installed on the lift beam 1 at equal intervals. Reference numeral 3 denotes a support cylinder fixed on each of the crossbar carriers 2 and is provided in a direction orthogonal to the work transport direction. An air cylinder 4 is rotatably supported in the support cylinder 3 via a bearing 7. At the same time, piston rods 4b and 4c project from the piston 4a housed in the air cylinder 4 in both directions.

A crossbar mounting member 5 is provided at the tip of the piston rod 4b protruding in a direction opposite to each other, and both ends of the crossbar 6 are supported between the crossbar mounting members 5. It has become. An air pipe (not shown) is connected to the tip of the piston rod 4c protruding on the opposite side, and air is supplied from the air pipe into the air cylinder 4 through a passage 4d in the piston rod 4c. It has become.

On the other hand, one end of a lever 8 is keyed to the end of the air cylinder 4 on the side where the piston rod 4c protrudes, and a link 10 is connected to the other end of the lever 8 via a pin 9. One end is pivoted. The other end of the link 10 is pivotally connected via a pin 14 to a distal end of a lever 13 fixed to a rotary shaft 12a of a rotary drive source 12 composed of a rotary actuator installed on the crossbar carrier 2. In the drawing, reference numeral 15 denotes a stopper for stopping the rotation of the lever 8 at the turning end, which is a stopper (not shown) provided inside the rotary drive source 12, and the lever 8 is controlled before the rotation range of the rotary drive source 12 is restricted. Are set in such a manner as to contact the stopper 15.

Next, the operation will be described. In transporting the work, the lift beam 1 is driven up and down, and the crossbar carrier 2 is driven in the feed direction. As a result, the crossbar 6 bridged between the crossbar carriers 2 is operated two-dimensionally in the lift direction and the feed direction, and suction means such as a vacuum cup attached to the crossbar 6 via an arm is provided. (Both not shown) are sucked and transported to each processing station of the transfer press.

On the other hand, while the workpiece is being conveyed, the lever 8 is rotated by the rotary drive source 12 until the lever 8 comes into contact with the stopper 15. At this time, the rotation of the rotary drive source 12 is regulated by the stopper provided therein. Since the lever 8 is not pressed, the lever 8 is kept pressed against the stopper 15, so that even if there is a backlash in the rotary drive source 12 or a backlash in the link mechanism, no backlash is generated in the crossbar 6. Misfeed, noise and vibration can be prevented from being generated. When changing the mold, the crossbar 6
Sometimes you carried out from the press body together with the mold, is approximately 90 ° rotation of the cross bar 6 by the rotary drive source 12. As a result, the arm protruding from the crossbar 6 stands upright, so that the mold and the crossbar 6 can be carried out by the moving bolster without interfering with the upright.

[0011]

According to the invention, as described in detail above, the lever mounted on the air cylinder is pressed against the stopper by the rotary drive source to define the swivel end of the crossbar. Even if a moment acts on the bar due to the inertia of the work or the like, the crossbar does not rattle. As a result, misfeeding during work transfer can be prevented, and noise and vibration can be reduced. In addition, since a rotary actuator can be used as the rotary drive source, the turning device can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a conventional crossbar turning device.

FIG. 2 is a plan view showing a crossbar turning device according to an embodiment of the present invention.

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

FIG. 4 is an arrow view from the Y direction in FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lift beam , 2 ... Crossbar carrier, 4 ... Air cylinder, 4b ... Piston rod, 6 ... Crossbar, 8 ... Lever, 10 ... Link, 12 ... Rotation drive source, 15 ... Stopper.

Claims (1)

(57) [Scope of request for utility model registration] 1. A are arranged in the workpiece transfer direction, and with a vertically movable lifting beam 1 into a plurality of crossbars carrier 2 which is movable to feed direction provided with mutually connected at regular intervals, these crossbars In a transfer feeder in which a crossbar 6 to which a work suction means is attached is interposed between carriers 2, an air cylinder 4 is rotatably provided on the crossbar carrier, and a piston protruding from the air cylinder 4 is provided. A crossbar 6 is detachably mounted between the tips of the rods 4b.
A link 15 is connected between a lever 8 fixed to the crossbar and a rotary drive source 12 provided on the crossbar carrier 2 via a link 10, and a stopper 15 is provided near the lever 8 for defining a turning range of the crossbar 6. Crossbar turning device for transfer feeder.