JPH0783905B2 - Conveyor device in press machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a conveying device in a press machine.

2. Description of the Related Art Conventionally, for example, a transfer press machine is provided with a transfer device (also referred to as a transfer device) that transfers a blank material along a pressing process. As shown in FIG. 5, the carrying device includes a pair of left and right lifting bars 52 arranged on both sides of a press body 51 and each of these lifting bars 52.
Conveying members 54 supported on the upper and lower sides via carriages 53 so as to be reciprocally movable in the conveying direction of the blank material, and a plurality of blank material holders mounted between the pair of left and right conveying members 54 at predetermined intervals. 55 and the above carriage 53
Moving device 56 that reciprocates the blank material in the blank material transport direction
And an elevating device 57 for elevating the elevating bar 52 between a blank material pressing position and a blank material conveying position. The elevating device 57 includes a plurality of elevating shafts 58 arranged at predetermined intervals along the transport path, and a cylinder device for elevating and lowering each of these elevating shafts 58 via a rack and pinion mechanism 59. (Eg hydraulic cylinder) 60
It consisted of and.

Further, the elevating shaft body 58 is not arranged at a position corresponding to the bolster truck 61 so as not to get in the way when the bolster truck 61 on which the mold is placed is pulled out.

SUMMARY OF THE INVENTION However, according to the above-mentioned conventional configuration, the elevating shaft body 58 that supports the elevating bar 52 is not arranged in the drawer portion of the bolster cart 61, so the elevating bar 52 bends,
There is a problem that vibration occurs, and accordingly, the holding position of the blank material is misaligned and accurate conveyance cannot be performed.

Although it is conceivable to increase the rigidity of the lifting bar 52 itself, there is a problem because the weight of the movable part increases.

Therefore, an object of the present invention is to provide a conveying device in a press machine that can solve the above problems.

Means for Solving the Problems In order to solve the above problems, the conveying device in the press machine according to the present invention has a pair of left and right support bars that can be moved up and down on both sides of the press machine body, and the support bars can be moved to a predetermined height. An elevating device for raising and lowering is provided, and a plurality of elevating bodies are provided on both of these support bars so as to be able to ascend and descend through the elevating transmission device, and an elevating drive device for driving the elevating transmission device is provided on the press machine main body side. , A feed bar having a holder for a blank material is movably supported in each of the elevating bodies in the transport direction, and at the time of exchanging the mold, by the elevating device,
The support bar is moved up and down.

Operation According to the above configuration, the feed bar for conveying the blank material is supported by the support bar, and the support bar is vertically movable by the elevating device. Therefore, the elevating device moves the feed bar to the mold via the support bar. The mold can be pulled out to the side of the press body by raising it to a position above the upper surface.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a press body, and a pair of left and right support bars 2 having high rigidity are arranged so as to be able to move up and down on both sides of the press body. A cylinder device (an example of a lifting device, for example, a hydraulic cylinder is used) 4 that lifts and lowers the support bar 2 in the vertical direction is arranged. Elevating bodies 5 are provided at a plurality of suitable places of the support bar 2 so as to be able to move up and down via an elevation transmission device 6, and each of these elevating bodies 5 holds a blank material holder (for example, a cross bar 8 and a cross bar 8). A feed bar 9 having a suction cup 7 and the like attached to the cross bar 8 is movably supported in the blank material conveying direction (hereinafter referred to as the front-back direction) via a guide cam follower 10. The lower flange portion 9a of the feed bar 9 is sandwiched and guided by the upper and lower cam followers 10. Further, an elevation drive device 11 for driving the elevation transmission device 6 is provided on the press body 1 side. Hereinafter, the elevation transmission device 6 and the elevation drive device 11 will be described in detail. Lift transmission device 6
As shown in FIGS. 1 to 3, the casings 12 are attached to the support bar 2 at a plurality of appropriate places, and the casings 12 are vertically movably inserted and the upper end portions thereof are the above-mentioned elevating body. 5, the lifting rack shaft body 13 connected to 5,
A movable rack shaft body 14 which is horizontally inserted through each casing 12 and is supported so as to be movable in the front-rear direction along each support bar 2, and a support shaft body 15 inside the casing 12.
The rack teeth 13a and 14a are rotatably supported by the rack teeth and are formed on the outer peripheral portion of the rack shaft bodies 13 and 14 at the intermediate portions thereof.
And a pinion body 16 having tooth portions 16a and 16b meshing with each other. In addition, as shown in FIG. 4, the lifting drive device 11 includes a gear box 21 arranged at the end of the support bar 2, a lower portion rotatably supported by the gear box 21, and spline teeth 22a on the upper portion. A vertical spline shaft body (rotating shaft body) 22 formed with a spline tooth 22a and a rack tooth 14b formed at the end of the movable rack shaft body 14 on the outer periphery of the spline tooth 22a so as to move up and down. A drive pinion 23 having a meshing tooth portion 23a and held by a holding box 24 on the support bar 2 side, and the spline shaft body 22 arranged on the press machine main body 1 side via a pair of bevel gears 25, 26. And an electric motor (rotational drive device) 27 for rotationally driving the motor. Therefore, when the electric motor 27 is driven, the spline shaft body 22 rotates, the drive pinion 23 rotates, and the moving rack shaft body 14 moves in the front-rear direction. When this moving rack shaft body 14 moves in the front-back direction, the pinion body 16 rotates,
The lifting rack shaft body 13 is moved up and down, so that the feed bar 9, that is, the holder 7 is moved up and down via the lifting body 5. Also, the end of the feed bar 9 is
Is connected to a moving device (not shown) for moving the vehicle in the front-back direction. Therefore, the blank material can be conveyed by the moving device and the lifting drive device 11. The elevating operation of the support bar 2 is performed between a position where the blank material can be conveyed and a mold take-out position that does not interfere with the drawing operation of the mold.

In the above configuration, when exchanging the mold, the support bar 2 may be raised by the cylinder device 4 to a mold taking-out position above the upper surface of the mold, and the bolster cart 31 may be pulled out. At this time, the driving pinion 23 for driving connection between the lifting transmission device 6 arranged on the support bar 2 side and the lifting drive device 11 arranged on the press machine body 1 side is formed by the spline shaft body 22. Since it is fitted onto the teeth 22a, the connected state is maintained even when the support bar 2 is moved upward. Further, the connection between the feed bar 9 and the moving device is also designed so as not to separate even when the feed bar 9 rises. That is, the carriage on the moving device side is arranged on the press body 1 side so as to be movable in the front-rear direction, and a vertical engaging groove is formed at the tip of this carriage, and the feed bar 9 side is provided with this engaging groove. An engagement pin that engages with the engagement groove is provided. Of course, the length or height of this engagement groove is equal to or longer than the range of raising and lowering movement of the support bar 2.

In this way, the feed bar 9 is supported by the support bar 2 without disconnecting the lifting drive system. Therefore, by increasing the rigidity of the support bar 2 and increasing the number of lifting bodies 5, the feed bar 9 is installed. Even if the rigidity of 9 itself is small, it is possible to suppress the occurrence of bending and vibration of the feed bar. Moreover, the movable rack shaft body 14
Is supported on the side of the support bar 2 and the lifting rack shaft body
The length of 13 may be shorter than that of the conventional one, so that the weight of the movable part can be made very light, so that the driving force is small and the conveying operation is more accurate.

EFFECTS OF THE INVENTION According to the configuration of the present invention as described above, the feed bar for conveying the blank material is supported by the support bar. Therefore, by increasing the rigidity of the support bar, the space required for drawing out the mold is obtained. It is possible to suppress the bending and vibration of the feed bar that occur when the above-mentioned condition is secured, and therefore the blank material can be accurately conveyed. Further, since the feed bar can be supported by the support bar at a plurality of locations, the feed bar itself can be miniaturized to reduce the weight of the movable part, and a more accurate transport operation can be performed.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention.
FIG. 1 is a side view of a main part of a conveying device, FIG. 2 is a partially cutaway side view of a lifting / lowering transmission device, FIG. 3 is a sectional view taken along line I-I of FIG. 2, FIG. FIG. 5 is an overall side view of a conventional conveying device. 1 ... Press machine main body, 2 ... Support bar, 4 ... Cylinder device, 5 ... Elevating body, 6 ... Lifting / lowering transmission device, 7 ... Holder, 11 ... Lifting drive device, 13 ... Lifting rack Shaft, 13
a …… Lack tooth, 14 …… moving rack shaft body, 14a …… Lack tooth, 16 …… pinion body, 16a, 16b …… tooth part, 22 …… spline shaft body, 22a …… spline tooth, 23 …… Drive pinion, 27 …… electric motor, 31 …… bolster truck.

Claims (1)

[Claims] 1. A pair of left and right support bars are arranged on both sides of a press body so as to be able to move up and down, and an elevating device for elevating the support bars at a predetermined height is provided. A body is provided so as to be able to move up and down via an elevation transmission device, an elevation drive device for driving the elevation transmission device is provided on the press body side, and a feed bar having a holder for a blank material is provided on each elevation body in the transport direction. A carrier device in a press machine, which is movably supported and is configured such that the support bar is moved up and down by the elevating device when a die is replaced.