JPS61115632A - Carrying device in plastic working machine - Google Patents

Abstract

PURPOSE:To hold works of different shape surely by arms in a carrying device that moves on rectangular locus by constituting plural handling arms to differ in amount of moving. CONSTITUTION:A work carrying device is constituted of a pair of transfer bars 10, 11 and plural handling arms A2b-A4b, and the two transfer bars 10, 11 are moved to make rectangular locus in a vertical plane, and the works are carried successively to working stations S1, S2. When a driving rack 21 is moved in longitudinal direction by rotation of a driving gear 30, arms A2a, A3a and arms A2b, A3b are moved in opposite direction. In the first working station S1, the arms A2b, A2a are moved by pinions 24, 26, 27 in a small amount l1 of movement, and in the second working station S2, they are enabled to move by pinions 25, 28, 29 in a large amount of movement.

Description

Detailed Description of the Invention 16.Objective of the Invention (1) Industrial Application Field The present invention provides a method in which a lower mold and an upper mold are respectively disposed to cooperate with each other to plastically process a workpiece. The present invention relates to a conveying device in a plastic processing machine for sequentially conveying the workpiece between a plurality of processing stations set at intervals of 61 along the line.

(2) Prior Art Conventionally, in such a conveyance device, a transfer bar (-) is disposed on one or both sides of each processing station, and the handling arm is supported in a cantilever by the transfer bar.

(3) Problems to be Solved by the Invention In the above-mentioned conventional conveying device, when the workpiece is relatively large and thin, such as a car bonnet or door outer, the plate thickness is thin. It is unstable if the handling arm holds the workpiece in a single position, so the handling arm is provided with a plurality of suction cups over a wide area so that the workpiece can be sucked and held at a plurality of locations and transported. For this reason, in order to provide a suction cup over a relatively wide range along the conveyance direction, the length of the handling arm becomes a dog in the conveyance direction, and during plastic working with the lower die and upper die, such as press work, the handling arm is Either the handling arm is evacuated to the side from the processing station, or the distance between each processing station is widened, and the handling arm is placed on standby between each processing station.

If the shift force is used to retract the no-ndling arm to the side, it is not only necessary to stop press processing for the retraction time, but also the operation is complicated.
The structure is also complicated and manufacturing costs are high (in addition, the handling arm is divided into multiple parts for retracting operation, but since the divided handling arms are equipped with suction cups, it is difficult to hold and transport the workpiece. becomes unstable, and in severe cases, there is a risk that the workpiece may fall.Furthermore, in the case where the handling arm is placed on standby between each processing station, the intervals between the stations must be set wide, so there is a large number of processing stations. In the case of a press device that is set, the overall length becomes a dog, which is a problem.

Therefore, the present applicant has made the handling arms movable along transfer bars placed on both sides of each processing station, so that each handling arm is driven by the same amount of movement by a driving means, and each handling arm is moved during press processing. A conveying device has already been proposed in which the timing is set between each processing station. According to this conveyance device, the structure can be simplified and a series of plastic working can be performed smoothly, and the intervals between the working stations do not have to be set so wide.

When the Σ roller is placed in a press machine, for example, the shape of the workpiece is determined by each pressing process, such as the drawing process, finishing process,
This is different for each trimming process, and if the amount of movement of the handling arm from the initial position is the same at each processing station, such as in the above-mentioned transport device, it is difficult to hold the workpiece reliably. In such a press machine, it is conceivable to keep the amount of movement of each handling arm constant and use a handling mechanism, but this is preferable because the handling mechanism is dedicated to each processing station. That's not the point.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a conveyance device for a plastic processing machine in which the amount of movement of each handling arm is made different depending on the machining step to which the handling arm corresponds. shall be.

B0 Structure of the Invention (1) Means for Solving the Problems The conveyance device of the present invention includes a pair of transfer bars that extend in the conveyance direction and are arranged on both sides of each processing station, and is installed across both transfer bars. a plurality of handling arms that are movable back and forth in the transport direction and capable of holding the work; and an arm drive for driving the handling arms with different movement amounts depending on the processing stations. and means.

(2) Operation The handling arm is driven by the arm drive means by an amount of movement depending on the corresponding processing station. Therefore, it is possible to reliably hold workpieces having different shapes at each processing station with the non-handling arm.

(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 5, for example, first to third processing stations 5. , S2.5
．． are set at equal intervals, and each processing station 51
- S3 includes lower molds 3° to 33 and upper molds 4. to 33 for pressing the workpiece W in cooperation. 43 are arranged, respectively. That is, lower mold 3. ~33 is the bolster 6 on the base 5
The upper molds 4I to 43 are supported by the holders 8 fixed to the lifting table 7 at equal intervals along the conveying direction 2 in correspondence with the lower molds 31 to 33, respectively.

A conveying device 9 is attached to this press machine 1, and a lower mold 3. 33 and the upper molds 41 to 43 and the transport operation by the transport device 9 are performed alternately, and the workpiece W is pressed at each of the processing stations S and S3. For example, the first processing station S,
In the drawing process, in the second processing station S2, the earrings were made.
In the finishing molding and third processing station S, trimming and dividing steps are performed, respectively.

Referring also to FIG. 2, the conveyance device 9 includes a pair of transfer bars 10.11 arranged parallel to the conveyance direction 2 on both sides of each processing station S to S3, and a pair of transfer bars 10.11. A plurality of non-handling arms 41 (Z+ALb...A4(1,A
4b. Both transfer bars 10.11 are connected to each other by stays 12 at positions corresponding to the center portions between each processing station S, ~S, when both transfer bars 10.11 are in a standby state during press working. be done.

Behind the base 5 and the bolster 6 that overflow in the transport direction 2,
A carry-in table 13 is provided, and a discharge chute 14 is provided in front of the base 5 and the droplet star 6 along the conveyance direction 2.

The handling arms A1α, /Ilb are connected to both transfer bars 1 in correspondence with the loading table 13 at the front and back along the conveyance direction 2.
0.11, and the remaining ]・ndling arm A
2α, A2b...A4 (1, A4b also corresponds to the first to
It is installed between both transfer bars 10.11 before and after the third processing stations S, -S3 along the conveyance direction 2.

Therefore, in each adjacent processing station, the handling arm on the front side along the conveyance direction 2 and the handling arm on the rear side in the conveyance direction 2 are different from each stay.
It will be placed on both sides of 2. That is, for example, the front handling arm 12α along the transport direction 2 in the first processing station S1, and the transport arm 12α in the transport direction 2 in the second processing station S2? The handling arms 42b on the rear side of the E35 are arranged on both sides of the stay 12.

In FIG. 3, below both transfer bars 10° 11, guide plates 15 extending horizontally along the conveying direction 2 are supported by pillars 16, and are guided through the transfer bars io and i1u rollers 1γ. Board 15
are placed on top of each other.

Both transfer bars 10 and 11 are driven in the front and back direction along the conveyance direction 2 by a horizontal drive means (not shown), and in the vertical direction by a vertical drive means (not shown). This causes both transfer bars 10.11 to move in a rectangular trajectory in the vertical plane.

Each handling arm A1α, Alb...A4σ, A
4b are each equipped with a suction cup (not shown), and can move in a direction away from the stay 12 to hold the workpieces on the carry-in table 13 and each of the processing stations 51 to s3. Hunt ring gear 1hAl corresponding to 13 and the first processing station s1
(For 1, Alb, A2tl, and A2b, it is better to make the movement amount 11 relatively small and lift the end of the workpiece W with a suction cup for better stability.
2.53 Vc compatible handling arm A3 (Z,
For A3b and A'4 (1, A4b, it is better to make the movement amount A2 relatively large.

Therefore, handling arms A1a, Alb, and A2a.

A275 is moved by the arm driving means 20 with a relatively small movement amount 11, and the handling arm A3 (1
, A3h, A4 (1, 44b is the arm driving means 20
It is moved by a relatively large amount of movement 12.

The arm driving means 20 includes both transfer bars 10.1.
A pair of drive racks 21 are arranged movably along the conveyance direction 2 on the conveyance direction 2, and handling arms A1α to A4 on the front side along the conveyance direction 2 (racks respectively carved in l and facing the drive racks 21). 22, a rack 23 engraved on the rear handling arm Alb-A4b along the transport direction 2 and facing the drive rack 21, and one rack at a position corresponding to the loading table 13 and the first processing station S1. 22 and the drive rank 21, and the second and third processing stations S.
2, a binion 25 interposed between one rack 22 and the drive rack 21 at a position corresponding to S3, and a loading platform 1
3 and the first processing station S, a pair of binions 26 and 27 are interposed between the other rack 23 and the drive rack 21 at positions corresponding to the second and third processing stations S.
john s2.

A pair of binions 28 and 29 are interposed between the other rack 23 and the drive rank 21 at a position corresponding to S3, and a drive gear 30 is pivotally supported by the ends of both transfer bars 10 and 11 and meshes with the drive rack 21. Equipped with. This drive gear 30 is rotationally driven in forward and reverse directions by a drive source (not shown) such as a pulse motor.

The drive rack 21 moves in the transport direction 2 according to the rotational movement of the drive gear 30? E? Move around 5.

The movement of this drive rack 21 is carried out via the binions 24, 25 and the rack 22 to one of the handling arms A1α~
A4Q and their handling arm A1 (
1-A4Q moves in the opposite direction to the drive rack 21. Further, the operation of the drive rack 21 is controlled by a pair of binions 26, 27;
28, 29 and the rack 23 to the other handling arm Alb-A4h, which handle arm Hb-y4b moves in the same direction as the drive rack 21. Therefore, the handling arms on both sides of the stay 12, for example Ala and A2b, are connected to the arm driving means 2.
By 0, mutually opposite directions, that is, directions away from each other,
Alternatively, they may be moved closer to each other.

Moreover, as shown in FIG. 3, the pinion 25 has a gear part 25α that meshes with the drive rack 21 and a gear part 25b that meshes with the rack 22 and has a larger diameter than the gear part 25a, coaxially and in two stages, upper and lower. The rack 22 is driven in the opposite direction by a movement amount larger than the movement amount of the drive rack 21. In addition, either one of the pair of biniops 2B and 29 is configured with a two-stage upper and lower gear section similar to the binion 25, and is configured to move the rank 23 by a larger amount of movement than the amount of movement of the drive rank 21. It is driven in the same direction as the drive rack 21.

Therefore, when the driving gear 30 moves the moving arm 21 by the length gl, the handling arm yi1
a, /11b, A2a, and i2h move by an amount of movement E1, which is the same as their length 11, whereas handling arms A3Q, A3b, r44tl, and A4b move by an amount of movement 12, which is larger than 11.

Next, the operation of this embodiment will be explained. The lower dies 31-3 and the upper dies 41-4 at each processing station S1-S. After the press working, the conveyance device 9 is operated, and the workpieces W on the carry-in table 13 and the processing stations Sl to S3 are conveyed to the next processing stations 51 to S3 and the discharge chute 14. That is, when the lifting operation of the lifting table 7 and the upper molds 41 to 43 integral therewith is started, the arm driving means 20 first moves the corresponding handling arms A1α, A1...A4α and A4b move. Next, each handling arm AIQ.

ALb...Work F corresponding to A4α and A4b
is held, both transfer bars io and ii rise and then move in the transport direction 2? 65, horizontally moves forward to convey each workpiece W onto the next processing stations 51 to S3 and the discharge chute 14, and further descends. Therefore, each handling arm A1 (Z, Alb・
By releasing the holding state of each workpiece W by A4σ and A4b, the workpieces W are placed on the corresponding processing stations 51 to S3 and the discharge chute 14. Both transfer bars 10.11 then move rearward along the conveyance direction 2, and each handling arm, 4
1 a.

Alb...A4Q, A4h return onto the original loading table 13 and each processing station 5l-53. After that, each handling arm A is operated by the arm driving means 20.
IQ, A1h-・A4Q, A4b return to the stay 12 side. Therefore, there is nothing on each of the processing stations 51 to S3 that would impede press processing, and there is no longer anything on each of the processing stations 51 to S3 that would interfere with the press processing, and the lifting table 7 and the upper die 4. ~4. Pressing of the workpiece W is performed by the lowering operation.

In this way, the workpiece W is conveyed from the first processing station S to the third processing station S while repeating press working and transport alternately, and a series of press working is completed.

In such a conveying device 9, each handling arm A1α, Alb...A4α, A4b moves to stand by between each processing station S, ~S3 during press processing, so conventionally the handling arms were moved to the side. Compared to the case in which it is retracted, the time required for the standby movement is shorter and there is no need to interrupt the press working operation, so that the press work is performed smoothly. Moreover, the pair of handling arms 11σ, Alb...A
Since the workpiece W is held at 4α, 44b,
The workpiece W can be held stably.

Furthermore, handling arms 41α, Alb, A2α, and A2b, and handling arms A3α, A3h, A4α, and A4 correspond to the shape of the workpiece W to be held.
Since the amount of movement is made different from h, the workpiece W can be held at an optimal position, and the workpiece W can be held more stably.

In the above embodiments, the arm driving means 20 is a combination of a rack and a pinion, but a cylinder or a link mechanism may also be used.

C0 Effects of the Invention As described above, the apparatus of the present invention includes a pair of transfer bars disposed on both sides of each processing station along the transport direction of the workpiece, and a pair of transfer bars installed across both transfer bars, and It is equipped with a plurality of handling arms that are movable and capable of holding the workpiece, and an arm driving means for driving each handling arm by varying the amount of movement depending on each processing station, so that the shape of the workpiece can be adjusted. The workpiece can be held by the handling arm at an appropriate position corresponding to this, and the holding of the workpiece is stabilized.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall schematic side view, FIG. 2 is an enlarged plan view of main parts, and FIG.
It is a sectional view taken along the line Ill-In in the figure. 1... Press machine as a plastic processing machine, 2... Conveyance direction, 31-33... Lower die, 4. ~43...upper mold, 1
0°11...Transfer bar, 20...Arm driving means,

Claims (1)

[Claims] A lower die and an upper die are respectively arranged to cooperate to plastically process the workpiece, and the workpiece is sequentially passed through a plurality of processing stations set at intervals along the conveyance direction of the workpiece. A conveying device in a plastic processing machine for conveying includes a pair of transfer bars disposed on both sides of each processing station along the conveyance direction, and a pair of transfer bars installed across both transfer bars, and a pair of transfer bars disposed on both sides of each processing station along the conveyance direction. a plurality of handling arms that are movable and capable of holding the work;
A conveying device for a plastic processing machine, comprising arm driving means for driving each of the handling arms by varying the amount of movement depending on each of the processing stations.