JP2554796B2 - Work transfer device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work transfer device provided in, for example, a transfer press machine.

[0002]

2. Description of the Related Art Generally, a transfer press machine is provided with a work transfer device for sequentially transferring a work over a plurality of steps. By the way, conventionally, as shown in FIGS. 3 and 4, a work transfer device of this type (for example,
Japanese Unexamined Patent Publication (Kokai) No. 63-207429) discloses a pair of left and right elevating bars 51 arranged on both sides of the press machine over substantially the entire length thereof, and each of these elevating bars 51 is movably supported in the work conveying direction. The feed bar 52,
A crossbar 53, which is mounted between the feedbars 52 at a predetermined interval in a direction perpendicular to the conveying direction and is provided with a work holder (for example, a suction cup, not shown), and the elevating bar 51 are moved up and down. The rack-and-pinion type elevating and lowering drive device 54 is provided, and the reciprocating drive device 55 is provided at the end of the press machine to reciprocate the feed bar 52 in the front-rear direction. The reciprocating driving device 55 is movably mounted on the elevating bar 51 and connected to the feed bar 52 by a connecting member 5.
It is composed of a drive carriage 57 connected via 6 and a swing cylinder device 59 for reciprocating the drive carriage 57 via a swing arm 58.

Therefore, in the above structure, the swing cylinder device 59 reciprocates the feed bar 52 in the front-rear direction, and the elevating / lowering device 54 elevates and lowers the elevating bar 51 to hold it on the holder of the cross bar 53. The formed work can be sequentially moved to each press process.

[0004]

By the way, according to the above-mentioned conventional structure, since the elevating bar 51 and the feed bar 52 are arranged over the substantially entire length of the press machine and on the left and right sides, it is possible for an operator to enter the press machine. Going in and out becomes difficult,
Therefore, the crossbar 5 supported by the feedbar 52
There is a problem that various works such as adjustment of the holder provided in No. 3 or maintenance of the mold are troublesome.

Therefore, an object of the present invention is to provide a work transfer device which can solve the above problems.

[0006]

In order to solve the above problems, in the work transfer apparatus of the present invention, a plurality of pressing steps are sequentially arranged and a crossbar to which a work holder is attached corresponds to the pressing steps. A work transfer device for a transfer press machine that is placed at a certain position, in which liftable elevating bodies are sequentially arranged along a work transfer path and on both sides thereof, and the end of a crossbar is attached to each of these elevating bodies. A reciprocating device for supporting and reciprocating the crossbar along the transport direction is provided.

[0007]

According to the above construction, the reciprocating device for supporting the end portion of the crossbar and reciprocating along the transfer path is provided on the elevating members provided at predetermined positions on both sides of the transfer path of the work. Therefore, it is possible to raise and lower the crossbar by raising and lowering each elevating body, and it is possible to reciprocate the crossbar in the work conveying direction by operating the reciprocating device provided in each elevating body. it can. Therefore, unlike the prior art, it is not necessary to provide the elevating bar and the feed bar on the left and right sides of the pressing process and over substantially the entire length.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 2, reference numeral 1 is a transfer press machine in which a plurality of press steps are sequentially arranged, and the press machine 1 is provided with a work transfer device 3 for sequentially transferring a work 2 along each press step.

As shown in FIG. 1, the work transfer device 3 includes a support 11 arranged on both sides of the work transfer path and at an upper portion thereof in sequence, and a rack and pinion type support 11 mounted on the support 11. An elevating / lowering body 13 which is vertically movable via an elevating / lowering device 12, a first gear 14 fixed to a lower end of the elevating / lowering body 13, and a bearing 1 at the bottom of the elevating / lowering body 13.
5, a vertical first rotary shaft body 16 rotatably supported, a first swing arm 17 fixed to a lower end portion of the first rotary shaft body 16, and a first swing arm 17 A second swing arm 19 rotatably attached to the tip end of the second rotary shaft body 18 via a vertical second rotary shaft body 18, and the number of teeth is half that of the first gear 14 and the second rotary shaft body 18 is provided. A second gear 20 fixed to the upper end of the intermediate gear 21, a middle gear 21 meshed with the first gear 14 and the second gear 20 and rotatably supported by the first swing arm 17, It is composed of a first servomotor 25 for rotating the first rotary shaft body 16 via timing gears 22 and 23 and a timing belt 24. A reciprocating device is constituted by the swing arms 17 and 19, the gears 14, 20, and 21 and the second servomotor 33.

Further, the rack and pinion type lifting device 12 has a rack body 3 provided on a lifting body 13 in a vertical direction.
1 and the rack body 31 disposed on the support body 11 side.
Having a pinion 32 that meshes with the rack tooth 31a of the second
It is composed of a servo motor 33.

Further, the second side on both sides in each step
A cross bar 5 to which a holder (for example, a suction cup) 4 for holding the work 2 is attached is supported between the tip ends of the swing arms 19.

In the above structure, the second servo motor 33
Is operated, the elevating body 13 is moved up and down with a predetermined stroke. Further, when the first servomotor 25 is operated to swing the first swing arm 17 in a predetermined direction in the horizontal plane, the intermediate gear 21 swings around the first gear 14 and rotates about the second gear. The second swing arm 19 swings in the horizontal plane via 20.

Attention is paid to the swinging arms 17 and 19 at this time, and when the first swinging arm 17 is rotated at a predetermined angle in a predetermined direction (direction of arrow a), the second swinging arm is swung by twice the angle. The moving arm 19 swings in the opposite direction (arrow b direction).
Therefore, the first swing arm 17 and the second swing arm 19
Are equal in length, the tip end portion of the second swing arm 19 moves along a straight line (performs a strict linear motion). Of course, this moving direction is made to coincide with the conveying direction of the work 2, and therefore when the left and right first swing arms 17 are reciprocally swung within the range of 180 degrees, the tips of the respective second swing arms 19 are moved. The crossbar 5 whose both ends are supported by the part is reciprocated back and forth.

That is, by operating the first servomotor 25 and the second servomotor 33, the crossbar 5 is moved up and down and moved back and forth, so that the work 2 is sequentially conveyed along each pressing process.

As described above, since the swing arms 17 and 19 for moving the crossbar 5 back and forth are attached to the elevating body 13 arranged along each pressing process and on both sides thereof,
Since a lifting bar and a feed bar as in the conventional case are not required, maintenance and inspection of the holder or the mold attached to the crossbar 5 can be easily performed.

In each pressing step, the stroke of the crossbar 5 in the front-rear direction can be changed.
Furthermore, the movement locus of the work can be changed, and therefore complicated machining can be dealt with.

In the above embodiment, the second servo motor 33 of the lifting device 12 is arranged on each support 11, but, for example, the pinions 32 provided on each support 11 are provided on both sides of the work transfer path. You may make it connect with a connecting shaft body one by one and rotate by one servo motor.

[0018]

As described above, according to the structure of the present invention, the elevating members are provided at predetermined positions on both sides of the work conveying path, and the elevating members support the end portions of the crossbars to form the conveying path. Since a reciprocating device for reciprocating along it is provided, it is not necessary to provide a lifting bar and a feed bar on the left and right of the pressing process and over almost the entire length as in the past, so workers can easily enter and exit the press machine. Therefore, maintenance and inspection of the holder or the mold attached to the crossbar can be easily performed.

[Brief description of drawings]

FIG. 1 is a partial cutaway perspective view of a work transfer device according to an embodiment of the present invention.

FIG. 2 is an overall perspective view showing a schematic configuration of a transfer press machine in the example.

FIG. 3 is a side view of a work transfer device in a conventional example.

FIG. 4 is a plan view of a work transfer device in a conventional example.

[Explanation of symbols]

 1 Transfer Press Machine 2 Work 3 Work Transfer Device 4 Work Holder 5 Crossbar 11 Support 12 Elevator 13 Elevator 14 First Gear 16 First Rotating Shaft 17 First Swing Arm 18 Second Rotating Shaft 19 19th 2 Swing Arm 20 Second Gear 25 First Servo Motor 33 Second Servo Motor

Claims (1)

(57) [Claims] 1. A work transfer device in a transfer press machine in which a plurality of pressing processes are sequentially arranged and a crossbar to which a work holder is attached is arranged at a position corresponding to the pressing process. A reciprocating device is provided along the path and on both sides thereof, which is capable of moving up and down in sequence and supports the end portions of the crossbars on these lifting bodies to reciprocate the crossbars in the transport direction. A work transfer device characterized in that