JPS61115633A - Carrying device in plastic working machine - Google Patents

Abstract

PURPOSE:To make the distance between working stations unequal by providing plural arms for holding works in transfer bars arranged on the side of working stations, and providing a device for driving the arms. CONSTITUTION:Transfer bars 10, 11 provided with arms A1-A4 that hold works are arranged on the side of working stations. When the working of the work is completed, the transfer bars 10, 11 are lowered and the work is held by handling mechanisms 12 of the arms A1-A4. Then, the transfer bars 10, 11 are lifted and advanced in the distance of carrying by a distance l1 by a horizontal driving device 31. The arms A1, A2 are positioned above lower dies 31, 32, and at the same time, the arm A3 is advanced by a distance l3 by extending action of an oil pressure cylinder 18 and positioned above a lower die 33. The work is placed on the lower dies 31-32 and the next work is performed.

Description

Detailed Description of the Invention A1 Object of the Invention (1) Industrial Application Field The present invention provides a method for moving a workpiece to a plurality of processing stations set at intervals along the conveyance direction of the workpiece. A lower die and an upper die for plastic working are respectively disposed, and transfer bars are disposed on one side or both sides of each of the processing stations in order to sequentially transport the work between the respective processing stations, The present invention relates to a transfer device in a plastic processing machine that is provided with an arm equipped with a handling mechanism for holding a workpiece.

(2) Conventional technology Conventionally, in such a transfer device, a transfer bar is displaced to draw a rectangular trajectory in a vertical plane in order to use a handling mechanism to hold and transfer workpieces on processing stations installed at equal intervals. ing.

(3) Problems to be Solved by the Invention In the above-mentioned conventional technology, the machining stations/yeons are arranged at equal intervals, and the arms arranged at equal intervals are made to move along the same trajectory. The spacing is determined according to the size of the largest lower mold and upper mold. For this reason, the transport device inevitably becomes larger.

The present invention has been made in view of the above circumstances, and by making at least one arm movable in the transport direction of the workpiece, it is possible to make the intervals between processing stations unequal, thereby making it possible to reduce the size of the workpiece. The purpose of the present invention is to provide a conveyance device for a plastic processing machine that is designed to achieve

B6 Structure of the invention
1□(1) Means for Solving the Problems According to the present invention, at least one of the arms is supported on the transfer bar so as to be movable back and forth along the workpiece conveyance direction, and the arm is supported on the transfer bar. A drive means is provided.

(2) Function Since at least one arm can be moved back and forth in the transport direction, it is possible to set each processing station at unequal intervals, and it is possible to shorten the length of the transport device.

(3) Example Hereinafter, an example of the present invention will be explained with reference to the drawings. First, in FIG. 1, a plastic processing machine such as a press machine 1
In this embodiment, a plurality of processing stations s1, for example, first to third processing stations s1. s2. s
3 are set, and each processing station 51 to S3 has lower molds 31 to 31 for cooperatively performing dance processing on the workpiece W.
33 and upper mold 4. 43 are arranged, respectively. That is, the lower molds 31 to 3. are fixed to bolsters 6 on the base 5 at intervals along the transport direction 2, and a holder 8 fixed to the lifting table 7 has upper molds 4. ~43 are supported, respectively.

Further, a carry-in table 13 is provided behind the base 5 and the bolster 6 along the transport direction 2, and a discharge chute 14 is provided in front of the base 5 and the bolster 6 along the transport direction 2.

A conveying device 9 is attached to this press machine 1, and the pressing operation of the lower dies 31 to 33 and the upper dies 41 to 43 by lowering the lifting table 7 and the conveying operation by the conveying device 9 are performed alternately. The work W carried onto the table 13 is sequentially pressed on each of the processing stations 51 to S3, and then
The discharge chute 14 is also discharged.

Referring also to FIG. 2, the transfer device 9 includes a pair of transfer pars 10° 11 arranged parallel to the transfer direction 2 on both sides of each of the processing stations 51 to S3, and a transfer bar between the transfer bars in and ii. The first to fourth arms A1 to A4 that are constructed across the
4, and a handling mechanism 12 provided in each of the four.

The first arm A1 is provided perpendicular to the transfer direction 2 by connecting the rear ends of both transfer pars 10.11 along the transfer direction 2, and the handling mechanism 12 equipped on the first arm A1 is It functions to transport the workpiece W on the table 13 to the first processing station S1. Also the second
- The fourth arms A2 to A4 transfer the workpiece W of the first processing station S1 to the second station S2 and transfer the workpiece W of the second processing station S2 to the m3 coating varnish f by the handling mechanism 12 equipped thereon. -'/ To 7S3, in order to convey the workpieces W of the third processing station S3 to the discharge chute 14, the transfer pars 10 and 11 are installed parallel to the first arm A1. Further, a fifth arm A5 is provided between the front ends of both transfer pars 10.11 along the conveyance direction 2, but this fifth arm A5 is not equipped with a handling mechanism 12.

The transport distance of the work W from the loading table 1.3 to the first processing station S1 and the transport distance of the work R from the first processing station S1 to the second processing station S2 are the same value. , 11, whereas the second processing station S2
The conveyance distance 12 of the workpiece W from to the third processing station S3 is as follows:
A scrap chute hole 15 is provided at the front of the lower mold 3 along the line 3. For reasons of safety, it is set to be larger than the distance 11 by a distance 13. That is, 12-11=13.

For this reason, 1. Second and fourth arms A1. A2゜A
Both ends of the third arm A3 are fixed to both transfer pars 10.11, whereas both ends of the third arm A3 are movable back and forth along the conveyance direction 2 and attached to both transfer pars 10.1.
1 is supported.

That is, referring also to FIG. 3, the first and second processing stations s1. Both transfer pars 10.11 are provided with guide rails 16.16 extending along the conveying direction 2 at positions corresponding to between the third arm A3 and the guide rails 16.s2. 16, it is supported so as to be movable back and forth along the conveyance direction 2. Moreover, the length of the guide rail 16.16 is set so that the third arm A3 can be moved by at least a distance e3, and the length of the guide rail 16.16 is set so that the third arm A3 can be moved by at least a distance e3. The support plate 17.17 has
A hydraulic cylinder 18.18 is supported as drive means. The piston rods 19. of these hydraulic cylinders 18.18.
19 movably passes through the support plate 17° 17 and is connected to the third arm A3, so that the hydraulic cylinder 18
．． 18, the third arm A3 moves in the transport direction 2.
Move back and forth along.

Below both transfer pars 10 and 11 is a column 20.
．． 20 supports guide plates 21, 21 extending parallel to the transport direction 2, and both transfer pars 1
0.11 is placed on the guide plate 21.21 via the wheels 22.22.

Guide rails 23 and 23 extending horizontally along the conveying direction 2 are arranged on both outer sides of both the transfer pars 10 and 11, respectively. Traveling plates 25.25 are placed on both guide rails 23.23 via each pair of wheels 24.24, and by connecting both traveling plates 25.25 with a connecting plate 26, the traveling vehicle 27 are constructed. This traveling vehicle 27 moves on the guide rail 23.23 in the transport direction 2.
It is possible to run back and forth along the guide rails 23 corresponding to at least both ends of both transfer pars 10 and 11.
．． 23. Guide rods 28.28 are still erected near both ends of the connecting plate 26, and each guide rod 28.2
Cylindrical connecting members 29, 29 are fitted into the transfer holes 8 so as to be vertically movable, and each connecting member 29, 29 is connected to the ends of the transfer pars 10, 11. Therefore, by driving the traveling vehicle 27 back and forth along the transport direction 2 on the guide rails 23, 23, both transfer bars io and it are horizontally moved back and forth along the transport direction 2.

Also, both transfer pars 10.11 have guide rods 28.2
It is movable up and down along 8.

A horizontal driving means 31 is connected to the traveling vehicle 27 via a pair of connecting arms 3.0 and 30.
1, the traveling vehicle 27 is horizontally driven on the guide rails 23°23. Further, a vertical drive means such as a hydraulic cylinder (not shown) is provided between the connecting plate 26 of the traveling vehicle 27 and both transfer pars 10.11, and both transfer pars 10.11 are moved up and down by the operation of the vertical drive means. Moving. Due to the functions of the horizontal drive means 31 and the vertical drive means, both transformers 7arno<-10
11 is moved horizontally and vertically, and is moved as a whole to draw a rectangular locus within a vertical plane.

4 and 5, the no-end ring mechanism 12 includes a pair of support rods 36α pivotally supported by the first to fourth arms A1 to A4 at positions spaced apart from each other in the longitudinal direction.
, 36b, and each support rod 36α.

Suction cups 37 as holding means provided at both ends of 36&, and support rods 36a, 36! '.

A pair of rotation shafts 39α and 39b whose lower ends protrude downward from each arm A1 to A4 are supported rotatably around their axes at positions spaced apart in the longitudinal direction of the first to fourth arms A1 to A4. The longitudinal center portions of the support rods 36α, 36b are fixed to the lower ends of the rotating shafts 39α, 39h. Therefore, the support rods 36α, 36b are rotatable around the vertical axis. These support rods 36d, 361! A pair of suction cups 37 are provided at both ends of the l.

The rotation driving means 38 is built in each of the arms 1 to A4, and includes a hydraulic cylinder 40 that can extend and contract along the longitudinal direction of each arm A1 to A4, and a rotation shaft 39α within each of the arms 1 to A4. Each rotating shaft 39a is fixed to the upper part of 39h,
39b, and a drive rod 43 coaxially connected to a piston rod 42 of a hydraulic cylinder 40 and connected with a pin to the tip of each of the rotary arms 41α, 41b. .

According to this rotation drive means 38, the hydraulic cylinder 4
By expanding and contracting the drive rod 43 and the rotating arm 4.
', (L, 4 l b and rotation axis 39CL, 3
9b, both support rods 364 and 366 connect to each arm A1.
~A4 is rotated between a stored state parallel to A4 and a protruding state perpendicular to each arm A1 to A4 and protruding to both sides.

Next, to explain the operation of this embodiment, at each processing station S1 to S3, the lower molds 3, -3, and 4 are
, to 43, the transfer bars io and 1i stand by so that the arms A1 to A5 are positioned between the loading table 13, the processing stations 51 to S3, and the discharge chute 14, respectively. ing. That is, the first arm A1 is located behind the loading table 13 along the transport direction 2, and the second to fifth arms A2 to A
5 is between the loading table 13 and the first processing station 51;
They are located between the first and second processing stations S1.52, between the second and third processing stations S2.53, and between the third processing station S3 and the discharge chute 14, respectively. In this state, the third arm A3 is connected to the second arm A3.
It has moved to a position where the distance from the fourth arm A4 is 11, and the distance from the fourth arm A4 is 12. Moreover, each handling mechanism 12 has its support rods 36α, 36b attached to each arm A.
1 to A4 are in a stored state parallel to each other.

Lower molds 3□-33 at each processing station 51-S3
When the press working by the upper molds 41 to 43 is finished and the upper molds 41 to 43 are raised, each handling mechanism 12 brings its support rods 36α, 36b into a protruding state perpendicular to each arm A1 to A4. Moreover, transfer par io, i1
As shown by the arrow 44 in FIG.
After moving until it is located above S1 to S3, it descends.

As a result, the loading table 13 and each processing station 51
The work W on ~S3 is held by the suction cups 37 in the handling mechanisms 12 of the first to fourth arms A1 to A4, respectively.

Next, the transfer parlor 10.11 rises once as shown by the arrow 45, and further horizontally moves forward in the conveyance direction 2. At this time, the third arm A3 is extended to both transfer pars 1 by the extension operation of the hydraulic cylinder 1B.
It moves relative forward by a distance of 13 compared to 0.11. This causes the first and second arms AI, A'l to
and second processing station s1. s2 lower mold 3. ．． 3
When reaching above □, the third arm S3 reaches above the lower die 33 of the third processing station S3. That is, in response to the forward movement of both transfer bars to, ii by a distance of 11, the first. Second. 4th arm, 4i, A'l
, A4 also moves forward by a distance of 11, whereas the third arm A3 moves forward by a distance of 12, which is longer than the distance fl11. After this horizontal movement, both transfer bars ia
, 1i are lowered and each handling mechanism 12 has a suction cup 37
The holding state of each workpiece W is released. As a result, the workpieces on the loading table 13 and each processing station 51 to S3 are transported to the next processing station 51 to S3 and the discharge chute 14.

After this, both transfer pars 10 and 11 return to the samurai position shown in FIG.
The arm 13 has a distance of 1 due to the contraction operation of the hydraulic cylinder 18.
3 to the rear along conveyance direction 2, and all arms A1~
A5 returns to its original position. Moreover, the handling mechanism 1-2 of each arm A1-A4 puts its support rod 36α, 3615 in a stored state parallel to each arm A1-A4.

In this way, the work W is alternately pressed and transported, and is transported to the discharge chute 14 through the loading table 13 and the first to third processing stations 51 to S3 in order. , a series of press processing is completed.

In such a transfer device 9, the third arm A3 is directed forward and backward along the transfer direction 2, and both transfer pars 10.1
1, the distance between the second and third processing stations S2.53 can be made larger than the distance between the first and second processing stations S1.52. In other words, it is no longer necessary to adjust the distance between the first and second processing stations S1°S2 to the distance between the second and third processing stations S2, 53, and the length of the transport device 9 in the transport direction 2 is shortened. be able to.

In the above embodiment, only the third arm A3 is movable relative to both transfer pars 10.11, but the other arms may also be movable relative to each other. Further, the present invention can also be applied to a case where a transfer bar is arranged only on one side of each processing station 51 to S3 and an arm is provided on the transfer bar.

C8 Effects of the Invention As described above, according to the present invention, at least one of the arms is movable back and forth along the workpiece conveyance direction and is supported by the transfer bar, and the transfer bar is provided with a driving means for the arm. Therefore, it is not necessary to set the processing stations at equal intervals, and it is possible to shorten the length of the conveying device.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall schematic side view, FIG. 2 is an enlarged plan view of the main part of FIG. 1, and FIG.
The figures are a sectional view taken along the line lI[-L[I in FIG. 2, FIG. 4 is a sectional view taken along the line IV-rV in FIG. 3, and FIG. 5 is a sectional view taken along the line V-V in FIG. 4. 1... Press machine as a plastic processing machine, 2... Conveyance direction, 3. ~33...Lower mold, 41-43...Upper mold, 9
...Transfer device, 10.11...Transfer bar, 12...Handling mechanism, 18...Hydraulic cylinder A1-A5...Arm as driving means, 51-S3...Processing station, W ···work

Claims (1)

[Claims] A lower mold and an upper mold for cooperatively plastically working the work are respectively disposed at a plurality of machining stations set at intervals along the conveyance direction of the work, and a mold is placed between each of the machining stations. In a plastic processing machine, a plurality of arms equipped with a handling mechanism for holding a workpiece are provided on a transfer bar disposed on one side or both sides of each processing station in order to sequentially convey the workpiece by holding the workpiece. In the conveyance device, at least one of the arms is movable back and forth along the conveyance direction of the workpiece and is supported by the transfer bar, and the transfer bar is provided with a driving means for the arm. Conveyance device in plastic processing machine.