JPS5828658Y2 - Mold loading/unloading device for small presses - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mold loading/unloading device for a small press.

Conventionally, when changing the mold of a small press, the mold was directly transported to a predetermined position on the press's bolster using a crane, a fork, or the manual effort of an operator, and then tightened with bolts, etc., and when the mold was carried out, the bolts were removed. needed work.

This invention was developed in view of the above circumstances, and its purpose is to facilitate the loading and unloading of molds in small presses, which can greatly shorten the time required to change molds. The goal is to provide equipment.

Hereinafter, the present invention will be explained with reference to the drawings.

1 in the drawing is a press body, and the press body 1 is provided with a slide 2 that can be moved up and down.

A clamp plate 3 is fixed to the lower surface of the slide 2, and T-shaped grooves 25 are formed in the lower surface of the clamp plate 3, and the clamper 5 is movable and fixed in a predetermined position in these T-shaped grooves 25. installation possible.

In addition, a bolster 7 is fixed on the top surface of the ped 6.
A clamper 9 is provided in a T-shaped groove 8 on the upper surface of the bolster 7 so as to be movable and fixed at a predetermined position.

A lid 10 is provided on the bolster 7. In the drawing, R1 is a hydraulic circuit for the upper clamper 5, and the hydraulic circuit R1 is equipped with a distribution valve 11, and the distribution valve 11 is connected to a conduit 12 provided on the rear surface of the clamp plate 3.

The line 12 is connected to a hydraulic connection of the clamper 5 via a flexible line 13.

Further, the hydraulic circuit R1 is provided with a switching valve 14.

In addition, 15 in the drawing is a hydraulic circuit R2 of the clamper 9 of the lower mold.
This is a switching valve provided in the switching valve 15, and one port N of the switching valve 15
ib is connected to the hydraulic connection of the clamper 9 via a pipe 17.

The other port 15a of the switching valve 15 is connected to a flow path 19 of the bolster I via a pipe 18, and the flow path 19 is connected to a hydraulic pressure supply/discharge portion of the lifter 10.

A pair of brackets 20 are fixedly installed on the front surface of the apparatus main body 1, and a support body 21 is swingably provided on these brackets 20.

The upper surface 21a of the support body 21 is in the same plane as the upper surface 7a of the bolster 7, and a plurality of rollers 22 are pivotally supported on the upper surface 21a of the support body 21, and these constitute a rail 23.

A stopper 24 is fixed to the end of the support 21.

Pressure switches PI and P2 are installed in the hydraulic circuit R1tR2.
is the provision.

Next, the operation will be explained.

When installing the mold, the rail 23 is opened to the front of the press.

Next, by putting the switching valve 15 into the "lifter on" position, the lifter 10 is raised about 2.5 rrvnfi above the upper surface of the Polstaff.

Place the mold on the rail 23 using a crane, fork, etc.
Push the mold away by hand at the predetermined position 1.

Next, install the clamper 9 at an appropriate position.

By switching the switching valve 15 to the "lower clamper" position, the lower mold of the mold is set by the clamper 9.

After lowering the slide 2 and adjusting it to a predetermined position, the clamper 5 on the clamp plate 3 is installed at an appropriate position.

Setting of the upper die is completed by switching the switching valve 14 to the "upper clamp" position.

Each hydraulic circuit R1, R2 of the upper and lower mold clamps is equipped with a pressure switch P1. Because P2 is provided, if the hydraulic pressure in the hydraulic circuit R1tR2 drops below the specified hydraulic pressure due to hose breakage, oil leakage at the joint, etc. during press operation, the pressure switches P1 and P2 are turned off and the press operation is stopped in an emergency. An indicator light (not shown) is turned on.

Therefore, the pressure switch P1゜P2 opens the hydraulic circuit R.
1. By detecting the pressure in R2, that is, when the pressure in hydraulic circuits R1 and R2 does not reach the specified oil pressure, the operation of the hydraulic power source is stopped and the hose is cut or oil leaks from the joint. It is possible to prevent an accidental accident of the drop tube of the clamp plate 3 due to a decrease in the gripping force of the clamp plate 3 of the clamper 5 due to a decrease in oil pressure caused by such factors.

As described in detail above, the present invention is based on the bed 6 of the press body 1.
A rail 23 is provided in front so as to be able to protrude forward, a bolster 7 is fixed to the bed 6, a T-shaped groove 8 is provided along the left-right direction on the upper surface of the bolster I, and a lower mold of the mold is inserted into the T-shaped groove 8. A clamper 9 for gripping is provided to be movable and fixable at a predetermined position, a lifter 10 is provided to the bolster 7, a clamp plate 3 is fixed to the slide 2, and a 5T-shaped groove is provided in the lower surface of the clamp plate 3 along the left and right direction. 25, and a clamper 5 for gripping the upper mold of the mold is provided in this T-shaped groove 25 so as to be movable and fixable in a predetermined position, and a switch for operating the clamper 5 is provided in the hydraulic circuit R1 of the clamper 5 of the upper mold. A switching valve 1 which is provided with a valve 14 and operates the hydraulic circuit R2l1c of the lower mold clamper 9 and operates the lid 10 at the same time.
5, a conduit 12 is provided on the rear surface of the clamp plate 3, one connection side of the conduit 12 is connected to the distribution valve 11, and the other connection side of the conduit 12 is connected to the side end side of the clamp plate 3. This is a mold loading/unloading device for buttoning a small press, which is characterized in that the other connection side of the pipe line 12 is connected to the hydraulic connection part of the clamper 5 via a flexible pipe 13.

Therefore, by operating the switching valve 14, the upper clamper 5
and the switching valve 15 is operated to move the lifter 10 up and down and the crank lever 9 of the lower mold is switched. Because it is open, it is easy to carry in and take out the mold, and the work time for mold replacement can be greatly reduced. It can be moved to fit the mold, and regardless of the size of the mold, the upper and lower molds can be gripped by the clampers 5 and 9, making it easy to replace the mold. .

In addition, flexible piping 1 is installed so as not to interfere with the press work.
3 can be provided, eliminating the need to replace flexible piping depending on the size of the mold.

[Brief explanation of the drawing]

Fig. 1 is a front view of a small press equipped with a mold loading/unloading device according to an embodiment of the present invention, Fig. 2 is a side view of the same, and Fig. 3 is a
Fig. 4 is a hydraulic circuit diagram, which is a view taken from the direction of Fig. ■. 1 is the press body, 23 is the rail, 6 is the bed, 3 is the clamp plate, 7 is the bolster, 5 and 9 are the clampers, 1
0 is the lifter, 14.15 is the switching valve, R1+R2 is the hydraulic circuit %P11P2 is the breather switch.

Claims (1)

[Scope of utility model registration request] A rail 23 is provided on the front surface of the press body 10 and the bed 6 so as to be able to protrude forward, a bolster 7 is fixed to the bed 6, a T-shaped groove 8 is provided along the left-right direction on the upper surface of the bolster 1, and a T-shaped groove 8 is provided in the T-shaped groove 8. A clamper 9 that grips the lower die of the mold is movably provided and fixed at a predetermined position, and a lifter 10 is attached to the bolster T.
A clamp plate 3 is fixed to the slide 2, and a T-shaped groove 25 is provided in the left-right direction on the lower surface of the clamp plate 3, and a clamper 5 that grips the upper die of the mold can be moved in this T-shaped groove 25. The hydraulic circuit R1 of the upper mold clamper 5 is provided with a switching valve 14 for operating the clamper 5, and the hydraulic circuit R2 of the lower mold clamper 9 is provided with a switching valve 14 for operating the clamper 9. A switching valve 15 is provided, and a pipe line 12 is provided on the rear surface of the clamp plate 3, one connection side of the pipe line 12 is connected to the distribution valve 11, and the other connection side of the pipe line 12 is clamped. A mold loading/unloading device for a small press, characterized in that the other connection side of the pipe line 12 is connected to the hydraulic connection part of the clamper 5 through a flexible pipe 13 along the side edge side of the plate 3. .