JPS6111693B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a die changing device in a press machine.

In press processing, it has now become common to install a mold changing device to shorten mold changing time and improve productivity.

Usually, the drive motor for moving the bolster is attached to the moving bolster.
Therefore, it is necessary for the electric cord to be extended and contracted by some method while the bolster is being moved, which shortens the life of the cord and causes the cord to crawl on the floor, which significantly impairs work efficiency. In addition, it was possible to move the bolster in and out of the press in the front and back directions using the conventional method, but when it comes to a so-called cross-moving bolster, in which the pulled-out bolster is further moved crosswise, it is extremely difficult to handle the power cord. Ta. The device according to the present invention has an external drive source, pulls the bolster in and out, and makes the movement speed near the start and end points of the movement a sine wave, thereby improving the accuracy of restoring the bolster and making it possible to replace the cross-moving bolster. It is an object of the present invention to provide a die changing device for a press machine that has an easy structure.

To explain the drawings of one embodiment of the present invention,
In FIGS. 1 and 2, a pair of rails 14 on which the bolster 1 runs is provided in the direction in which the bolster 1 is carried out (the front-rear direction of the press). Pull plate 2
The upper end is fixed to the front surface of the carry-out side of the bolster 1, and the lower end is provided with a downward U-shaped groove. A chain 7 that reciprocates between points A and B in the front-rear direction is provided below between the pair of rails 14, and parallel to the chain 7, a mount 15 and its guide rollers 8, 9 are installed in the guide grooves 15a of the mount 15. The link pin 7a of the chain 7 is provided with a slider 3 that is engaged with and guided to move freely.
The slider 4 and the vertical guide groove 3a of the slider 3 are slidably engaged with each other. A left and right roller 10 is rotatably provided at the upwardly projecting end of the slider 3 and is engaged with a U-shaped groove of the pull plate 2. The left and right dimensional spacing of the chain 7 is regulated by sprockets 5 and 11, and the sprocket 5 is driven by the motor 12, so that the slider 3
moves between dimensions L, and at this time, the moving speed forms a sine wave within the range of dimensions P at both ends. When exchanging the mold, the bolster 1 is lifted from the ground state in the press by a bolster flotation device (not shown), and the pull plate 2 also floats together with the roller 10 at the tip of the slider 3 sandwiched between the U-shaped grooves, and the wheels 13 and become movable on the rails 14. The slider 3 starts moving toward the outside of the press by driving the motor 12, and after moving the L dimension, the motor stops. The guide roller 9 runs along a guide groove 15a provided in the pedestal 15. The rail portion 16 of the rail 18 that interferes with the slider 3 at the intersection with the cross-movement rail is the cylinder 1.
7 drive to avoid interference.

On the extension of the pair of rails 14, two carts 19, each having a U-shaped planar shape, are installed at the same height and connected by a connecting rod 20 so as to run on the rails 18. One wheel 13 on the traveling direction side of the bolster 1 running on a rail 14 and riding on a trolley 19 comes into contact with a stopper 29 provided in front of it and stops at a fixed position. The stopper 29 locks the bolster 1 in cooperation with a backstop device to be described later. A chain 30 that is driven reciprocally a required distance by a motor 31 is provided below the cart 19 between the pair of rails 18, and the chain 30 and the cart 19 are engaged so that both carts 19 are aligned with the pair of rails 14, respectively. Run between positions. When the cart 19 runs with the bolster 1 on it, the rollers 10 of the slider 3 and the U of the pull plate 2
The engagement with the groove is naturally released and separated. A backstop device is provided to prevent the bolster 1 from moving back and forth on the truck 19 when this engagement is released. That is, an elongated hole 19a is provided on the rail 14 side of the trolley 19, and this elongated hole 19a
As shown in detail in FIGS. 3 and 4, the force of a spring 24, which is pivoted by a fulcrum pin 27 and whose other end is fixed to the cart 19 by a pin 22, is constantly exerted to the left by a pin 23. The upper slope 21a of the stop plate 21 is configured to match the slope 28a of the plate 28 fixed to the wheel case 6 of the bolster. When the bolster travels from inside the press to the outside, the stop plate 21 is stored in the elongated hole 19a by the drive of a cylinder 26 having a shaped plate 25 fixed to its tip, and is passed through the bolster. The cylinder 26 is evacuated by the passage completion signal, and the stop plate 21 is raised again by the force of the spring 24 to prevent the bolster from moving to the right due to vibration or the like.

When the stop plate 21 is raised, it engages with the groove 28b provided in the plate 28, and the shaped carriage 19 connects the shaped openings through the bolster to form a □ shape, and when the carriage moves in the cross direction, the opening of the carriage 19 is engaged with the groove 28b provided in the plate 28. This has the effect of preventing the parts from opening and increasing rigidity. When the trolley 19 starts running in the left and right direction, the pull plate 2 and the slider 3
Since it is engaged with the U-shaped groove by a roller, the two are separated without any resistance. That is, the slider 3 remains, and the pull plate 2 and bolster 1 move together with the truck 19.

According to the present invention, a drive motor is not attached to the moving bolster to move the moving bolster, so the power cord is not moved together with the moving bolster, which is particularly problematic in the case of cross-moving type bolsters. It is possible to eliminate defects that cause code damage and workability. Also, due to the reciprocating rotation of the chain, which has two sprockets and a rotatable slider connected to the link pin, the moving bolster, which moves via the pull plate, has a sine wave moving speed near the start and end point of the moving bolster. Restoration accuracy can be improved.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a device according to an embodiment of the present invention, Fig. 2 is a partial explanatory diagram of a moving bolster drawer device of the present invention, and Fig. 3 is a plan view of a moving bolster drawer device according to an embodiment of the present invention. The stop plate explanatory diagram, FIG. 4, is a partial view taken in the direction of arrow C in FIG. 3. 1 is the bolster, 2 is the drawer, 3 is the slider,
4 is slider, 5 is sprocket, 6 is wheel case,
7 is a chain, 8 is a guide roller, 9 is a guide roller, 10 is a roller, 11 is a sprocket, 12
is a motor, 13 is a wheel, 14 is a rail, 15 is a frame, 16 is a rail part, 17 is a cylinder, 18
is a rail, 19 is a trolley, 20 is a connecting rod, 21 is a stop plate, 22 is a pin, 23 is a pin, 24 is a spring, 25
is a plate, 26 is a cylinder, 27 is a fulcrum pin, 28
is a plate, 29 is a stopper, 30 is a chain, and 31 is a motor.

Claims (1)

[Claims] 1 After carrying out the bolster with the mold installed in the front and back direction from the press, it is carried out from there in the left and right direction,
Or, in a device that is transported in the opposite direction, it is installed in the front and back direction from the press and runs the bolster.
It has a pair of rails, a front-back chain with sprockets at both ends installed below between the pair of rails and driven back and forth, and a vertical guide groove that engages with the link pin of the chain. a slider guided movably in the front and rear directions by a pedestal; a roller rotatably provided on the upwardly protruding portion of the slider with the left and right directions; A pull plate is fixedly installed and has a downward U-shaped groove at its lower end engaged with the roller, and a pull plate is provided on an extension of the pair of rails at the same height and has a U-shaped planar shape. None, a truck on which the traveling bolster is placed, a pair of left and right rails on which the truck travels, and a rail section that is reversibly provided on the left and right pair of rails to avoid interference with the slider. and a left-right chain that is provided below the cart between the pair of left-right rails, spans sprockets at both ends, and engages with the cart to drive it back and forth. Mold changing device for press machines.