Safety device for press
OwnerKunio Watanabeinventor
Life of this patent
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Abstract
The invention is related to a safety device for a press machine or the like. The safety device includes a first guard plate which slidably extends over the machine access area and is powered by an air cylinder having a movable rod connected to a movable arm of the first guard plate. The device also has a second guard plate slidably attached to the first guard plate which has a switch means for deactivating the air cylinder and therefore stopping the forward motion of the first guard plate whenever the second guard plate exhibits movement toward said first guard plate. For example, when a user's hand is in the access area and the second guard plate strikes the hand thereby slidably moving the second guard plate toward the first, the safety device is deactivated and the guard plates move away from the machine access area.
Claims9
A safety device for a machine, said device comprising:
- a frame, a first guard plate mounted in said frame for vertical movement with respect to said frame;
- a movable arm connected to said first guard plate for imparting vertical movement thereto;
- a movable rod connected to said movable arm for imparting movement thereto;
- motive means for imparting a movement to said movable rod;
- a first switch means connected to the machine for actuating said machine;
- a first switch actuation means operatively associated with said first switch means for actuating said first switch means when said movable rod moves;
- and
- a second guard plate movably attached to said first guard plate and having a second switch means operatively associated with said first guard plate for deactuating said motive means when said second guard plate moves relative to said first guard plate.
Dependencies are inferred from the claim text.