JPH0593700U - Safety equipment for press machines - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is designed so that the upper die mounting member that stops together with the ram at the rising limit of the ram is
It is an object of the present invention to easily provide a mechanical structure that prevents the risk of accidental fall. According to the present invention, a cylinder 12 and a guide insertion block are mounted on a mounting leg 11 mounted on the upper surface of a surface plate 5 or a horizontal surface corresponding to the upper surface, and the cylinder 12 is stopped together with the ram at the ascending limit of the ram 2 on the rod. A space holding piece 17 that advances and stops between the upper die mounting member 4 and the lower die mounting member 7 is fixed, and a retract detection signal of the space holding piece 17 is provided on the cylinder or guide insertion block side and the space holding piece side. This is a safety device for a press machine equipped with a detection sensor that generates

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a safety device for a press machine, and includes an upper die mounting member that stops together with the ram at the upper limit of the ram and a space holding piece that advances and stops between the lower die mounting member of the ram. It will be moved forwards and backwards regardless of the stoppage, so that the ram can be stopped in the ascending limit in case of any trouble.

[0002]

[Prior Art]

 The press machine is obliged to provide various safety devices, but in case of a failure of the stop of the ram at the ascending end, the interval is maintained regardless of the stop at the ascending end. There is no press machine that can be optionally assembled with a safety device of a type in which the piece is advanced between the upper die mounting member and the lower die mounting member, stopped, and retracted prior to the start of the press work.

[0003]

[Problems to be solved by the device]

 In the press machine, safety measures such as a clutch that stops the ram and the upper die in relation to the ascent of the ram and upper die after one unit of press work is performed, and the removal and forming of the press-formed product before the restart of the press work. Although it is known to take safety measures to prevent the ram from descending while inserting fingers between the upper mold and the lower mold for supplying materials, the present invention does not allow the ram and the upper mold to descend. The objective is to develop a structure that secures the safety of the press machine by providing a space holding piece that can be moved forward and backward so that it can move forward and backward.

[0004]

[Means for Solving the Problems]

 The safety device for a press machine according to the present invention is designed to meet the above-mentioned purpose, and a cylinder and a guide insertion block are attached to a mounting leg that is mounted on the upper surface of a surface plate or a horizontal surface corresponding to the upper surface, and the rod of the cylinder is attached to An upper die mounting member that stops together with the ram at the upper limit of the ram and a space holding piece that advances and stops between the lower die mounting member are fixed, and the holding piece is slidably inserted into the guide insertion block. In addition to being fixed to the guide rod, a detection sensor for generating a backward detection signal of the spacing holding piece is attached to the cylinder or the guide insertion block side and the spacing holding piece side.

[0005]

[Action]

 In the present invention, a cylinder 12 provided on an upper portion of a mounting leg 11 is mounted on a surface plate 6 and an upper die mounting member 4 which rises as the ram 2 of a press machine ascends and stops at the upper limit of the front ram 2. A space holding piece 17 is provided between the die mounting member 7 to stop and the holding piece 17 side and the cylinder 12 side are confirmed that the holding piece has returned to its original position by retreating and the detection signal A safety device that prevents the upper die mounting member from unintentionally lowering at the ascending end of the ram 2 of the press machine can be provided by providing the detection sensor that generates

[0006]

【Example】

 The attached drawings show one embodiment of the present invention. Fig. 1 is a front view of a ready-made press machine equipped with the safety device of the present invention, Fig. 2 is a side view of the safety device of the present invention, and Fig. 3 is the same front view. It is a figure.

FIG. 1 shows an example of a ready-made press machine. An upper die mounting member that moves up and down together with a ram 2 that is converted into vertical motion by an eccentric pin of an eccentric device equipped with a clutch and brake on an upper portion of a frame 1. A support board 3 is provided, and the upper die mounting member 4 is fixed to the upper die mounting member support board 3. Further, a surface plate 6 is provided on the table 5 below the frame 1, and a lower die mounting member 7 is fixed to the upper surface of the surface plate 6. Attach the support box 8 for the operation button to the front of the table 5. The detection sensor is composed of a proximity switch. The ram 2 is automatically stopped in a known manner every time the ram 2 is raised by one press work by the clutch brake, and the upper die mounting member support plate 3 and the upper die mounting member 4 are also stopped. Also stop.

2 and 3 are schematic views of an embodiment of the safety device of the present invention, in which the upper side of the surface plate 6 shown in FIG. The guide insertion blocks 14 and 14 are attached to the cylinder 12 and above and below the cylinder 12. A thick plate type support plate 16 is fixed to the rod 13 of the cylinder 12, and the support plate 16 is fixed to the guide rods 15 and 15 slidably inserted in the guide insertion blocks 14 and 14. The support plate 16 is fixed with an upper die mounting member 4 that stops together with the ram 2 at an ascending limit, and an interval holding piece 17 that extends between the lower die mounting member 7 and stops. Further, a detection sensor 18 for generating a backward movement detection signal of the interval holding piece 17 and the support plate 16 is attached to any one of the cylinder 12 and the guide insertion blocks 14 and 14 and the support plate 16. The detection sensor 18 is composed of a proximity switch.

The support leg 11 can be attached to the horizontal surface following the upper surface of the surface plate 6 in addition to the upper surface. The detection sensor 18 is composed of a light emitting element and a light receiving element which are separate bodies, and can be attached to the cylinder 12, one of the guide insertion blocks 14 and 14 and the supporting plate 16 so as to be shared.

In the safety device of this embodiment, the ram 2 that has been lifted after one unit of press work is stopped together with the upper die mounting member 4 in the ascending limit by the confirmation signal to drive the slow relay to drive the rod of the cylinder 12. 13 is advanced and the space holding piece 17 is advanced between the upper die mounting member 4 and the lower die mounting member 7 as shown by the chain line in FIGS. 1 and 2, so that the ram 2, the upper die mounting member 4, etc. Avoid untimely lowering to avoid injury to workers. Further, in order to resume the press work after taking out the press-molded product and supplying the press-molding material, etc., the start button 9 provided on the support box 8 is pushed to retract the rod 13 and the interval holding piece 17, etc. The detection sensor 18 detects the end of the retreat and generates a detection signal. The detection signal enables the ram 2 of the press machine to descend, and the above-mentioned detection signal is confirmed by lighting or extinguishing the lamp, and the start button 10 is pressed with both hands to resume the ram 2 descending. .

[0011]

[Effect of the device]

 The safety device for a press machine according to the present invention mounts the cylinder 12 and the guide insertion block 14 on the mounting leg 11 mounted on the upper surface of the surface plate 6 or a horizontal surface corresponding to the upper surface, and raises the ram 2 to the rod 13 of the cylinder 12. The space holding piece 17 that advances and stops between the upper die mounting member 4 and the lower die mounting member 7 that stop together with the ram at the limit is fixed, and the holding piece 17 can slide on the guide insertion block 14. It is fixed to the guide rod 15 inserted into the cylinder 12, or the guide insertion block side 9 and the interval holding piece side 18 is provided with the detection sensor 18 for generating the backward detection signal of the interval holding piece. When the ram 2 is stopped at the upper limit, the ram 2 and the upper die mounting member 4 are prevented from lowering due to an untimely failure by the spacing holding piece 17 which is a mechanical obstacle to prevent an accident. A safety device to stop, with the effect that can be equipped in the off-the-shelf of the press machine.

[Brief description of drawings]

 The attached drawings show an embodiment of the present invention.

FIG. 1 is a front view of a press machine equipped with the safety device of the present invention.

FIG. 2 is a side view of the safety device of the present invention.

FIG. 3 is a front view of the same.

[Explanation of symbols]

1 frame, 2 rams, 3 upper die mounting member support plate, 4 upper die mounting member, 5 table, 6 surface plate,
7 Lower die mounting member, 8 Support box, 9 Start button,
10 start button, 11 mounting leg, 12 cylinder, 13 rod, 14 guide insertion block, 1
5 guide rods, 16 support plates, 17 spacing holding pieces,
18 detection sensor

Claims (1)

[Scope of utility model registration request] 1. An upper die mounting member for mounting a cylinder and a guide insertion block on a mounting leg mounted on an upper surface of a surface plate or a horizontal surface corresponding to the upper surface, and stopping the rod of the cylinder together with the ram at a rising limit of the ram. A space holding piece that advances and stops between the lower die mounting members is fixed, and the holding piece is fixed to the guide rod slidably inserted in the guide insertion block, and the cylinder or the guide insertion block side, and A safety device for a press machine, characterized in that a detection sensor for generating a backward movement detection signal of the spacing holding piece is attached to the side of the spacing holding piece.