JPH0212656B2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention (1) Industrial application field The present invention relates to a plastic working method in which a plurality of processing stations for plastic working a workpiece are set at intervals in the transport direction of the workpiece. In the machine, a horizontal handling bar perpendicular to the transport direction of the workpiece is placed on standby between each processing station during plastic processing, and is moved between adjacent processing stations after plastic processing is completed. The present invention relates to a method and apparatus for transporting a workpiece, in which the workpiece is held by a plurality of holding members provided at intervals in the longitudinal direction and sequentially transported to each processing station.

(2) Conventional technology Conventionally, when transporting a workpiece in such a plastic processing machine, a holding member is fixedly disposed on the handling bar, and the workpiece is held and transported by the holding member. .

(3) Problems to be solved by the invention Incidentally, each processing station performs drawing, piercing, trimming, etc. of the workpiece, and at this time, in order to improve processing efficiency,
It has become common practice to process two or three workpieces simultaneously at a processing station. In that case, if the mold structure at each processing station is made compact, the positions of the workpieces at each processing station may become uneven along the longitudinal direction of the handling bar. Therefore, if the holding member is fixedly arranged on the handling bar as in the past, it cannot be used with the above-mentioned plastic processing machines, and if it is forcibly applied, it will not be possible to handle the large mold structure of the plastic processing machine. It may also lead to

The present invention has been made in view of the above circumstances, and the workpiece is moved and conveyed in the longitudinal direction of the handling bar in accordance with the arrangement of the molds at each processing station, thereby making the plastic processing machine more compact. It is an object of the present invention to provide a method and device for transporting a workpiece in a plastic processing machine, which can contribute to this.

B. Structure of the Invention (1) Means for Solving the Problems According to the method of the present invention, when a workpiece is transferred between adjacent processing stations, the holding members are moved on the handling bar so that the distance between them changes. I tried to force it.

Further, according to the device of the present invention, each holding member is supported on the handling bar so as to be movable along its longitudinal direction, and a driven wheel and a driving wheel are disposed at intervals along the longitudinal direction. is rotatably supported, and between the driven wheel and the driving wheel,
An endless transmission cable to which each of the holding members is connected is suspended, and a drive source capable of switching forward and reverse rotation is connected to the drive wheel.

(2) Effect By moving the holding member in the longitudinal direction of the handling bar according to the method of the present invention, the workpiece placement positions can be made different between two adjacent processing stations.

Further, in the device of the present invention, by running the power transmission cable using the drive source, it is possible to move the holding member along the longitudinal direction of the handling bar.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, the plastic processing machine 1 includes first, second, third... processing stations S1,
S2, S3... are set in a straight line with an interval between them, and the first processing station S1, for example, draws a single workpiece W, and the second processing station S2 draws the workpiece after drawing. Trimming of the work W and 2 of the work W
Division processing is performed, and the third processing station S
At step 3, the divided workpieces W' and W' are pierced.

The first processing station S1 is provided with a lower mold 2 and an upper mold (not shown) for drawing the work W in cooperation with the lower mold 2, and the second processing station S2 is provided with a lower mold 2 and an upper mold (not shown) for drawing the workpiece W in cooperation with the lower mold 2. , a lower mold 3 and an upper mold (not shown) for working with the lower mold 3 to trim the workpiece W as shown by a chain line 5 and to divide it as shown by a chain line 6 are disposed. Ru. In addition, the third processing station S3 includes a lower die 4 for placing the divided workpieces W' and W' at a distance from each other, and
A pair of piercing punches 7, 7 for punching holes on opposite sides of W', W' and an upper die (not shown) are provided.

This plastic working machine 1 is provided with a transport device 9 for sequentially transporting the works W, W', W' along a transport direction 8. This conveyance device 9 includes a pair of transfer bars 10 arranged parallel and horizontally on both sides of each processing station S1, S2, S3...
10 and their transfer bars 10,10
It includes a plurality of handling bars 11 horizontally installed between them, and a plurality of suction cups 12 as holding members provided on each handling bar 11.

The transfer bars 10, 10 are driven horizontally and vertically in synchronization, so that each handling bar 11 is driven at each processing station S1, S2, S2 during plastic processing at each processing station S1, S2, S3... , S3..., and after the plastic working is completed, it is moved between adjacent processing stations S1, S2; S2, S3; S3....

By the way, the interval between the divided workpieces W' and W' at the second processing station S2 is smaller than the interval between the workpieces W' and W' at the third processing station S3. For this reason, at least in the handling bar 11 that controls the transport of the workpieces W' and W' between the second and third processing stations S2 and S3, the suction cup 12 is disposed so as to be movable in the longitudinal direction of the handling bar 11. .

In FIGS. 2 and 3, the handling bar 11 has a cylindrical shape with a rectangular cross section, and both ends thereof are fixed to the transfer bars 10, 10. A pair of elongated holes 13 extending in the longitudinal direction of the handling bar 11 are provided on one side of the handling bar 11.
a, 14a are provided with an interval between them, and the long hole 13 is provided on the other side of the handling bar 11.
A pair of long holes 13b, 14b corresponding to a, 14a
is provided.

The long holes 13a, 13b; 14a, 14b are movable along their longitudinal direction, and the support shaft 1
5, 16 are inserted, and the elongated holes 13a, 13b; 14
A pair of suction cups 12 are attached to each end of the support shafts 15 and 16 protruding from the arms 17 and 18.
They are respectively arranged through. That is, two sets of four suction cups 12 are connected to the elongated holes 13a, 13b;
It is movable in the longitudinal direction of the handling bar 11 within the range defined by a and 14b, and is supported on the handling bar 11 with an interval between them.

Inside the handling bar 11, the elongated holes 13a, 13
b; On the outside of 14a and 14b, a driven wheel 19 and a driving wheel 20 having parallel axes are rotatably arranged, and the driven wheel 19 and the driving wheel 20 are equipped with an endless power transmission cable 21 such as a chain or a belt. is being hung up on. Furthermore, a drive source 22, for example, a pulse motor, which can be switched between normal rotation and reverse rotation, is connected to the drive wheel 20 in order to drive the transmission cable 21 to run.

The support shafts 15 and 16 are connected to the transmission cable 21,
In order to make the movement directions of both support shafts 15 and 16 opposite to each other, one support shaft 15 is connected to the power transmission cable 21 at the upper side, and the other support shaft 16 is connected to the power transmission line 21 at the lower side.

Next, the operation of this embodiment will be explained. During plastic working at each processing station S1, S2, S3, . . ., each handling bar 11 is on standby as shown in FIG. After the plastic working is completed, the handling bar 11 moves rearward in the conveyance direction 8 and descends, and the workpiece W or W', W' is attracted and held by the suction cup 12. After that, the handling bar 11 rises and moves forward along the conveyance direction 8, and moves to the next processing station S2, S.
3, the workpiece W or W', W' is placed on the lower die 3 or 4.

During such conveyance, in the handling bar 11 that controls the conveyance of the workpieces W' and W' between the second and third processing stations S2 and S3, the transmission cable 21 is moved in the direction of the arrow 23 by the operation of the drive source 22. The spindles 15 and 16, that is, the two sets of four suction cups 12, move in the direction of separating them from each other, and at the third processing station S3, the workpieces W' and W' are separated from each other by increasing the distance between them. Placed on mold 4.

After transporting workpieces W′ and W′, handling bar 1
1 is the second and third processing station S2, S3
When returning to the waiting position between
5, 16 and each suction cup 12 return to their original positions.

In the above explanation, the interval between the suction cups 12 of each set is widened during transportation, but it is of course possible to shorten the interval. Also handling bar 11
The present invention is applicable to a structure in which the transfer bar 11 is not fixed to the transfer bar 10 but is movable in the longitudinal direction of the transfer bar 11.

C. Effects of the Invention As described above, according to the method of the present invention, when a workpiece is transferred between adjacent processing stations, the holding members are moved on the handling bar so that the distance between them changes, so that each By changing the distance between the workpieces while floating in the air to be transported between processing stations, it is possible to change the distance between the workpieces while avoiding affecting the mold placement. It is possible to freely arrange the molds and contribute to making the plastic processing machine more compact.

Furthermore, in the device of the present invention, the handling bar includes:
Each holding member is supported movably along the longitudinal direction, and a driven wheel and a driving wheel are rotatably supported at positions spaced apart along the longitudinal direction, and between the driven wheel and the driving wheel. An endless transmission cable to which each of the holding members is connected is suspended, and a drive source capable of switching forward and reverse rotation is connected to the drive wheel, so that the transmission cable can be run by the operation of the drive source. By doing so, the holding member can be moved in the longitudinal direction of the handling bar,
The method of the present invention can be implemented with a simple configuration.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of the main part, FIG. 2 is an enlarged cross-sectional view taken along the line -- in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line -- in FIG. be. DESCRIPTION OF SYMBOLS 1... Plastic processing machine, 8... Conveyance direction, 9... Conveyance device, 11... Handling bar, 12... Suction cup as a holding member, 19... Driven wheel, 20...
Drive wheel, 21... Transmission cable, 22... Drive source, S
1, S2, S3... processing station, W,
W'...Work.

Claims (1)

[Claims] 1. A plastic processing machine 1 in which a plurality of processing stations S1, S2, S3 for plastically processing the workpieces W, W' are set at intervals in the transport direction 8 of the workpieces W, W'. A horizontal handling bar 11 perpendicular to the conveying direction 8 of the works W, W' is moved to each processing station S1, S2, S3 during plastic working.
The workpiece W is held in a standby state between the processing stations S1, S2, and S3 at the end of plastic working, and is moved between adjacent processing stations S1, S2, and S3 at the end of the plastic working. , W' are held and sequentially transported to each processing station S1, S2, S3.
A method for transporting a workpiece in a plastic processing machine, characterized in that during transporting W', the holding members 12 are moved on the handling bar 11 so that the distance between them is changed. 2 A plastic processing machine 1 has a plurality of processing stations S1, S2, and S3 for plastic working the workpieces W and W', which are set at intervals in the transport direction 8 of the workpieces W and W', and each station is It waits between processing stations S1, S2, and S3, and at the end of plastic working, it waits between processing stations S1 and S3.
A handling bar 11 is disposed horizontally orthogonally to the conveyance direction 8 of the works W and W' in order to move between the workpieces W and S3.
1, a plurality of holding members 12 for detachably holding the workpieces W and W' are attached to a handling bar 11.
In the workpiece conveyance device provided at intervals in the longitudinal direction, the handling bar 11 includes:
Each holding member 12 is movably supported along the longitudinal direction, and a driven wheel 19 and a driving wheel 20 are rotatably supported at positions spaced apart along the longitudinal direction. An endless power transmission cable 21 to which each of the holding members 12 is connected is suspended between the driving wheels 20 and the driving wheels 20.
A work conveyance device for a plastic processing machine, characterized in that a drive source 22 capable of switching between normal rotation and reverse rotation is connected to the workpiece transfer device. 3 The holding member 12 is attached to the handling bar 11
Claim 2, characterized in that two sets of holding members 12 are arranged at intervals in the longitudinal direction, and both sets of holding members 12 are connected to the power transmission cable 21 with their moving directions opposite to each other. A workpiece conveyance device in a plastic processing machine.