SU42015A1 - Safety device to mechanism for activating punching presses - Google Patents

Description

A two-handed system in safety devices for turning off punching presses is intended to protect the worker's hands from being struck by a punch when carelessly placing hands under the punch in the danger zone. The proposed two-handed system has the peculiarity that prevents the workers from jamming or tying workers to give freedom to their hands, for it is observed that sometimes workers tie hands with a cord or strap, which they operate with their feet, while freeing their hands.

In FIG. 1 is a side view of the proposed fixture; FIG. 2 is a top view; FIG. 3, 4, 5, 6-various phases of the device operation and FIG. 7 is a detail explaining the operation of the fixture.

On racks 7, 2, attached to the machine bed (Fig. 1, 2), dogs 3 and 4 (Fig. 3) are rotatably fixed, which can, in the lowered position, block the rotation of the shaft 5 fixed in the bearings behind the machine. The shaft 5 is locked by the action of the pawl 3 or 4 on the clutch 6 with two protrusions 7 and 8 fixed to the shaft 5. The clutch 6 is provided with a fist ring 9, 10, 11. The paw B carries on itself another pawl 12. Planck 13, moving with in the guides 14, 15,

attached to the table, bears the support 16. In addition, it is pivotally connected by a pin 17 to the end 18 of the curved lever 19 carrying the push handle 20. The exact same device with a similar handle 21 (Fig. 7) is placed on the right side For another, the hands of the worker. FIG. Figure 3 shows the initial position of the device when its handle is at rest. The dog 3 is moved away by the end of the bar 13 and held in this position by the dog 12 resting on the knuckle ring 9. The dog 4 acts with its protrusion on the ledge 8 of the coupling, and therefore the shaft cannot be rotated counterclockwise, as the shaft 5 is connected with pressure the foot pedal 22, as shown in FIG. 7. When the worker's hand pressed the handle 20 (Fig. 4) and the rod 13 was retracted to the right, and the stop 16 pushed the pawl 4 away and released the coupling b, then the shaft 5 is free. But at the same time, the dog 3 remains in the position of the first phase. Now it is necessary to press the foot pedal and start the machine, which will be possible by simultaneously pressing both hand grip 20 and 21 with the right and left hands.

FIG. Figure 5 shows the position when the hands of the worker pressed the handles, the pedal was pressed with the foot and the shaft turned. At the same time, the dog J2 slipped off

from the cam ring and touches the shaft 5 while the dog 3 pushes the sharpening of the clutch 6 with its weight. In FIG. b shows the position when the scabbard pedal is released and shaft 5 returns to its original position, with the projection 9 of the cam ring raising the dog 72, allowing the dog 3 to block the protrusion 7 of the clutch 6. In this position, the shaft 5 is blocked. When the worker’s hands are removed from the handle 20 27, the strips / 5, under the action of the spring, move to the left, having returned to the initial position (Fig. 3), and the end 23 of the plank / 5 will turn the pawl 3 to the initial position. Dogs 3 and 4 operate with their own weight, as a result of which the lower parts are rather heavy, and for greater reliability they are still interconnected by either one spring 24 or springs 25, 26 acting on compression.

The described adaptation to the mechanism for activating the stamping press is encased in a casing 27 to protect it from contamination and extraneous exposure.

The subject matter of the invention.

Safety device for the mechanism for activating punching presses, consisting of a shaft connected to the starting body and turned by a pedal, and two shaft-locking bodies controlled by two handles, characterized in that shaft-fortified shafts are used for the shaft 5 on fixed axles and acting on the protrusions 7, 8 of the shaft of the pawl 3 and 4, the first of which carries another pawl / 2, for which a punch ring 9, 10, 7 / is provided on the shaft.

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