JPS6016440Y2 - Press work conveyance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press work transfer device that transports a press work into or out of a press machine using work hands whose reciprocating loci are different.

When taking out a press work from a press machine, unloaders and loaders equipped with a work hand that picks up and removes the press work are often used as conveyance devices for feeding the press work into the press machine.

Conventionally, this work hand has been operated by a combination of vertical movement to feed and remove the press work from the mold tool, and horizontal movement to move the press work between the mold tool and the outside of the machine.

As shown in FIG. 11, the mechanism is such that an intermediate portion of a main link b connected to a work hand a and a swing link d fixed to a main shaft C are swingably supported by an intermediate pin e.
An auxiliary link f is provided parallel to the main link b, and the center distance between the bins g and h at both ends thereof is made equal to the center distance between the lower end bin i and the intermediate pin e of the main link b, and the upper end of the auxiliary link f is pivotally attached to the tip of the auxiliary swing link fixed to the auxiliary shaft j by the bin g, and the connecting link 1 is connected to the bins h and i to form a parallel link with the bins e* gy h and i as nodes. The main shaft C and the auxiliary shaft j are rotated by a drive mechanism of a swing arm and a cam (not shown), the waist swing link d is swinged, and the roller n at the upper end of the main link b is moved up and down by a guide 0. There is one that moves the parallel link mechanism m back and forth between the solid line position and the chain line position.

In addition, as shown in FIG. 12, a slide rod p connected to a work hand a is connected to a guide roller raw
The carrier q is held vertically movably via the ray raw r, and the carrier q is placed on the rail S by rollers rb*.
rby rb, a cam T fixed to the main shaft C, which is movable left and right by rb, a left and right movement mechanism V consisting of a transfer roller, a reaction cylinder, a swing link, an intermediate link, etc., a transfer roller, a reaction cylinder, etc.
A vertical movement mechanism W consisting of a swing link, an intermediate link, a swing arm, a bevel gear, a spline shaft, a binion, and a rack is linked, and the work hand a is rotated by the rotation of the main shaft C.
There are devices that reciprocate over a predetermined distance by horizontal and vertical movements.

However, in the former case, as shown in FIG.
, since both the forward and backward movements follow the same trajectory y, a waiting time is required until the upper die 2 of the press machine finishes rising above the trajectory of the work hand. Press work conveyance efficiency deteriorates.

In addition, in the latter case, the forward locus and the backward locus can be made different, but since the carrier q and the slide rod p are controlled via separate transmission means, the structure is complex and slight loosening and wear can occur. However, it has drawbacks such as a tendency to reduce operational accuracy.

The present invention was devised in view of these drawbacks, and the slide rod of the work hand is attached to a carrier that is movable left and right on a horizontal guide rail so as to be movable up and down.
The horizontal bar and the vertical bar constitute a four-bar link mechanism, one of the nodes of the upper horizontal bar is the main fulcrum of the link mechanism, and the vertical bar is linked to the node located diagonally to the main fulcrum. , a cam that is pivotally connected to the slide rod at a portion extending downward from the joint and controls a horizontal bar connected to the main fulcrum to control the vertical movement of the work hand; and one of the four-bar link mechanisms. A cam that controls one of the vertical bars to control the horizontal movement of the work hand is fixed to a cam shaft connected to a driving means, and the four-bar link mechanism is moved by each cam by driving the cam shaft. , the reciprocating trajectory of the work hand is made different, and when the upper mold tool of the press machine starts to rise slightly, the work hand enters into the mold tool and quickly attaches and detaches the press work, aiming to improve conveyance efficiency. The purpose of the present invention is to provide a conveying device for press work.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 9, 1 is a press work conveying device.

Reference numeral 2 denotes a box-shaped frame body such as an unloader (loader), and horizontal guide rails 4, 4 are fixed to the inner side of the lower edge of the lower horizontal member 3.3 of the box-shaped frame body through liners 5, 5. The carrier 6.6 is parallel to the horizontal guide rail and the traveling roller 7.
7... and guide rollers 11.11 which are disposed so as to be movable left and right via anti-sway rollers 8, 8, and have a slide rod 10.10 of the work hand 9 fixed to the carrier 6 inside the carrier 6.6. ...and anti-sway roller 8
, 8, and is mounted so that it can move up and down.

12 is a four-bar link mechanism, and the four-bar link mechanism is:
The horizontal par 13.14 and the vertical bar 15.16 form the pivot shaft 17.
It is composed of 1B, 19.20 as nodes, and the horizontal bar 1
3. The pivot shaft 17 is the main fulcrum 21 of the link mechanism 12, and the vertical bar 16 linked to the pivot shaft 20 located diagonally to the main fulcrum is extended downward from the pivot shaft 20. The lower end 23 of the portion 22 is connected to the slide rods 10, 10 by a pivot shaft 24.

Further, a cam shaft 26 is provided on the upper housing 25 of the box-shaped frame 2, and a vertical motion control cam 27, a horizontal motion control cam 30 consisting of a main cam 28 and an auxiliary cam 29 are fixed to the cam shaft, and A driving means 3 consisting of a motor 31, a clutch, a brake 32, and a speed reducer 33 is attached to the camshaft 26.
4 are connected via gears 35 and 36, and the camshaft 2
6, the vertical movement control cam 27 moves to the main fulcrum 21.
The horizontal movement control cam 30 controls the vertical bar 15 through a main roller 39 and an auxiliary roller 40 provided on the vertical bar and its extension 38. The work hand 9 moves forward from the standby position C toward the suction position A along a low locus, and from the suction position A to the detachment position B along a high locus H. Move back and return to standby position C
It is designed to return to.

The auxiliary cam 29 is formed so that the surface of the auxiliary roller 40, which is pivotally attached to the tip of the extension portion 38 of the vertical bar 15, matches the trajectory drawn by the swinging motion that follows the rotation of the main cam 28 together with the vertical bar 15. The main roller 39 of the vertical bar 15 is configured to always roll in close contact with the surface of the main cam 28 by the guiding action of the auxiliary roller 40 rolling on the auxiliary cam 29.

41 and 42 are connecting members for the carrier 6 and the slide rod 10, respectively; 43 is an upper mold tool of the press machine;
4 is a suction cup of work node 9.

According to the embodiment described above, each cam 27, 28 and 29
As the horizontal par 13 and vertical bar 15 rotate, the main fulcrum 2
The slide rod 10 moves up and down and left and right around point 1, and the slide rod 10 receives the combined movement to obtain movement trajectories H and L having different reciprocations as shown in FIG.

In addition, since the vertical bar 15 is in contact with each cam 28, 29 via the main roller 39 and the auxiliary roller 40, the vertical bar is reliably controlled against sudden changes in the cam surface, and a stable movement trajectory is obtained. be able to.

Note that instead of this example, as shown in FIG. 4, a reaction cylinder 45 is connected to the tip of the extension part 38 of the vertical bar 15 instead of the auxiliary roller 40, and only the left-right motion control cam 28 is used. It is also possible to bring the main roller 39 of the vertical bar 15 into close contact with the cam 28.

With the above-mentioned configuration, the present invention allows the unloader or workpiece hand of the press machine to enter when the upper die of the press machine rises slightly, thereby greatly reducing the waiting time for conveyance work and conveyance. In addition to significantly improving efficiency, the four-bar link mechanism is used to move the work hand vertically and horizontally with one vertical bar extending from the four-bar link mechanism, that is, one system of control transmission means. Therefore, with a simple structure, the slide rod of the work hand can be moved in a two-dimensional movement via the carrier, and the movement accuracy can be maintained at a high level, which is an excellent practical effect.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention; FIG. 1 is a front view of the press work conveying device, FIG. 2 is a plan view of the same, FIG. 3 is a side view of the same, and FIG. 4 is another embodiment of the lateral movement control cam. A front view showing an example, FIG. 5 is an enlarged front view of the carrier, FIG. 6 is a partially cutaway side view of the carrier, FIG. 7 is a plan view taken along the line ■-■ in FIG. 6, and FIG. 8 is a lateral movement control cam. Figure 9 is a diagram of the movement trajectory of the work hand, Figure 10 is a diagram of the movement trajectory of the work hand in a conventional example, and Figures 11 and 12 are a diagram of the conventional example of the press work transfer device. It is a drawing for explaining. 1... Press work conveyance device, 6...
Carrier, 9... Work hand, 10...
...Slide rod, 12...Four-bar link mechanism, 13.14...Horizontal par 15.16...
...Vertical bar, 21...Main fulcrum, 22...
・Extension part, 26...Camshaft, 27...
・Vertical movement control cam, 28... Main cam, 29...
...Auxiliary cam, 30... Lateral movement control cam,
34... Drive means, 39... Main roller, 40... Auxiliary roller, H... High locus, L... Low location Trajectory.

Claims (2)

[Scope of utility model registration request] (1) A carrier is placed on the horizontal guide rail so that it can move left and right, and the slide rod of the work hand is attached to the carrier so that it can move up and down, and a four-bar linkage mechanism is constructed with each pair of horizontal and vertical bars. One node of the horizontal bar is the main fulcrum of the link mechanism, and a vertical bar linked to a node located diagonally to the main fulcrum is pivoted to the slide rod at a portion extending downward from that node. a vertical movement control cam that controls the vertical movement of the work hand by controlling a horizontal bar connected to the camshaft connected to the driving means and connected to the fulcrum; 1. A press work conveyance device comprising a lateral movement control cam that controls lateral movement of a work hand by controlling a vertical bar. (2) The left and right control cam consists of a main cam and an auxiliary cam that are coaxially fixed, and a main roller and an auxiliary roller that are rotatably pivoted to a vertical bar that is pivoted to a main fulcrum, and are attached to both of the cams, respectively. The press work conveying device according to claim 1, wherein the main roller is brought into close contact with the main cam via a vertical bar by an auxiliary roller that contacts and follows the auxiliary cam.