Safety switch

Abstract

The invention is a kind of safety switch which prevents troubles caused in the maintenance management of a locking mechanism and to reduce the cost using few parts. In order to carry out maintenance work on a work robot R, a worker pulls a handle 30 of a slider 26, and by making this slider 26 retreat, a slider fitting part 37 is extracted from a fitting hole part 15, and an actuator 33 is extracted out from an operation part 22 of a door-switch 20. In this case, a key 18 inserted into a key-hole 16a of a lock 16 is rotated by 90[deg.], and a protruding part 17A for intervention is turned toward the longitudinal direction so that fitting of the slider fitting part 37 to the fitting hole part 15 is inhibited. It is so arranged that only in this state can the key 18 be disengaged from the key-hole 16a of the lock 16.

Description

technical field [0001] The present invention relates to a safety switch that detects the open state of an opening and closing door that opens and closes an entrance and exit in a working area where a machine such as a working manipulator is installed to stop the driving of a machine. Background technique [0002] There is a working area that surrounds the driving range of a machine such as a working manipulator with a guardrail or the like to ensure the safety of the surrounding area. In order to ensure the safety of operators and the like who enter the interior, a safety switch that detects the open state of the door and stops the machine is installed on the door of the entrance and exit of such a work area. [0003] At present, as such a safety switch, for example, the following structure is constituted: when the opening and closing door is closed, the actuator is inserted into the main body of the safety switch so that the working manipulator can be moved; The main body ...

AI Technical Summary

Problems solved by technology

[0009] In the above-mentioned existing safety switch, in order to limit the entry of the actuator into the main body of the safety switch, the insertion port of the main body of the safety switch needs to be closed with a sealing piece, and in order to securely fix the sealing piece at the closed position, a lock needs to be used. The locking mechanism is locked, and it is necessary to rotate the closing piece between the closed position that closes the insertion opening and the opening position that opens the insertion opening, and the locking mechanism (pin lock) that locks the closing piece in the closed position. When the insertion port is opened through the closure piece, the locking mechanism is either carried by the operator or stored in a suitable storage place, which is troublesome to maintain and manage, and it can be said that if the locking mechanism is needed in case the locking mechanism is hidden. Problems such as inability to use without knowing the storage place and the custodian

In addition, as a safety switch, the number of parts is large, which also increases the cost

Images