JPH0349771Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an automatic air connector device when an air circuit for automation control is used in a die of a press machine of a type in which the die is replaced by a die lifter.

Conventional technology Presses equipped with a movable bolster device sometimes use an automatic air connector that utilizes the lift stroke (generally 10 mm) of the movable bolster, but presses that use a die lifter to change molds use a die lifter. lift stroke is small (generally a few
mm), there was no automatic air connector.

Problems that the invention aims to solve As a result, rubber hoses and other parts had to be manually reconnected every time the mold was replaced, resulting in poor workability.

The present invention was devised in view of the above circumstances, and its purpose is to automatically connect and disconnect the air circuit from the press to the mold in conjunction with the operation of the die lifter. The purpose is to eliminate manual interruptions in the air circuit during replacement and improve work efficiency.

Means and Effects for Solving the Problems The automatic air connector device of the press machine according to the present invention is installed facing downward on the plate 8 fixed to the lower mold side, and is attached to the mold side in advance in another process. The upper valve 13 communicates with the mounting hole 20 provided in the bolster 3 or the frame 1 side in communication with the air inlet 23. The upper valve 13 is arranged so as to be movable up and down and biased upward by a spring. A valve body 19 is provided, a ring 11 is provided in the valve body 19 and is biased upwardly by a spring until the stopper 38 comes into contact with a locking part such as a stepped part 39, and the upper end of a rod 26 that passes through this ring 11. The valve body 9 is attached to the ring 11 and faces the upper surface of the ring 11.
and a piston 10 connected to the lower end of the rod 26 and fitted into the cylinder 24, and an operating circuit 29 of the die lifter 4 is connected to the upper pressure chamber 27 of the cylinder 24 into which the piston 10 fits. The air circuit from the press to the mold is automatically connected in conjunction with the operation of the die lifter 4.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 is the frame, 2 is the slide, 3 is the bolster,
4 is a die lifter built into the bolster 3, 5
6 is a lower mold or an adapter plate for the lower mold, and 6 is a mold drawer rail.

7 is a base fixed to the bolster 3 or the frame 1, and 8 is a plate fixed to the lower mold or the adapter plate 5 for the lower mold.

A mounting hole 16 is formed in this plate 8, and an upper valve 13 is mounted in a penetrating state in this mounting hole 16. The center of the upper valve 13 is an air passage 17, and a seal member 18 made of an annular elastic member is attached to the lower surface of the upper valve 13.

The base 7 is provided with a lower valve 12. The lower valve 12 includes a valve body 19, which is fitted into a mounting hole 20 formed in the base 7 via an O-ring 37 so as to be movable up and down. The ring 11 is provided to be movable up and down via an O-ring 21, and a stopper 38 provided on the ring 11 is in contact with a stepped portion 39 of the valve body 19, and the lower end of the ring 11 and the bottom surface 22 of the mounting hole 20 are connected to each other. A spring 14 is interposed between them. The mounting hole 20 communicates with an air inlet 23 provided in the base 7. A cylinder portion 24 is formed in the base 7, and a hole 25 is provided in the base 7 so as to pass from the cylinder portion 24 to the mounting hole 20. A piston 10 is fitted into the cylinder portion 24, and a rod 26 connected to the piston 10 passes through the hole 25 in a slidable manner, and a valve body 9 is attached to the upper end of the rod 26. . The piston 10 is urged upward by a spring 15.

Further, the upper pressure chamber 27 of the cylinder portion 24 communicates with an oil port 28 provided in the base 7.

29 is an operating circuit of the die lifter 4, in the operating circuit 29, 35 is a pneumatically driven pump, 31 is a tank, 32 is an operating valve, 33 is a switching valve, 34 is an air source, and a pipe leading from the pump 35 to the die lifter 4. A branch line 37' from line 36 is connected to the oil port 28.

Next, the operation will be explained.

When replacing the mold, hydraulic pressure is sent to the die lifter 4. That is, by operating the operation valve 32, the switching valve 33 is
Pressure is applied to the pilot port 33a of the die lifter 4 to switch the switching valve 33 and apply the discharge pressure of the pump 35 to the die lifter 4.

At this time, oil from the branch pipe 37' acts on the upper pressure chamber 27, causing the piston 10 to descend against the spring 15, causing the valve body 9 to descend via the rod 26 and contact the ring 11, closing the air passage A. (2nd
(See Figure A).

When the old mold is pulled out, the new mold is pulled into the brace, and the hydraulic pressure of the die lifter 4 is released at the fixed position, the hydraulic pressure of the upper pressure chamber 27 is also released, so that the piston 10
is raised by the spring force of the spring 15, the valve body 9 is lifted up via the rod 26, and the air passage A is opened.

At the same time, the spring 14 causes the ring 11 to
The valve body 19 is lifted up through the upper valve 13 so that the upper surface of the valve body 19 is
8 (see Figure 2 B).

For this purpose, the air inlet 23 from the press side is connected to the air passage 17 of the upper valve 13 via the air passage A.
It communicates with the mold side.

In addition, the air connection from the upper valve 13 to the mold is as follows:
The connection is made in advance in another work process, for example, in a work process called external setup at another location prior to the press work.

For this purpose, the operation of the die lifter 4 automatically connects the air circuit from the press to the mold.

Effects of the Invention The present invention is as described above, and can automatically connect and disconnect the air circuit from the press to the mold in conjunction with the operation of the die lifter 4. This eliminates the need for manual interruption of the air circuit when changing molds, improving work efficiency.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a press machine, and FIG. 2 is an explanatory diagram of the configuration of an embodiment of the present invention. 4 is a die lifter, 9 is a valve body, 12 is a lower valve, and 13 is an upper valve.

Claims (1)

[Scope of utility model registration request] An upper valve 13 is provided facing downward on a plate 8 fixed to the lower mold side and is communicated with the mold side in advance in another work process, and an upper valve 13 is connected to an air inlet 23 on the bolster 3 or frame 1 side. A valve body 19 is provided in a mounting hole 20 provided in a mounting hole 20 facing the upper valve 13 so as to be movable up and down and biased upward by a spring, and a stopper 38 is provided within this valve body 19 to engage a stepped portion 39 or the like. A ring 11 is provided which is biased upward by a spring until it abuts against a stop, and a valve body 9 is attached to the upper end of a rod 26 passing through this ring 11 and faces the upper surface of this ring 11.
and a piston 10 connected to the lower end of the rod 26 and fitted into the cylinder 24 with an upward spring bias. An automatic air connector device for a press machine, characterized in that an operating circuit 29 is connected thereto.