| 摘要 |
PROBLEM TO BE SOLVED: To provide an enable device for a teach pendant capable of canceling an ON state before both push button switches become a first OFF state, even if the other push button switch is in an ON state when one push button switch is made in a second OFF state by either one hand. SOLUTION: When a left hand operating push button switch is in an ON state, a second relay RL2 is degaussed, a normally closing contact RL2-1 of the second relay RL2 is made ON, a relay contact circuit RC is made ON, and in this state, when the left hand operating push button switch becomes the second OFF state, a normally closing contact R3-1 of the left hand operating push button switch is made ON, and a third relay RL3 is not degaussed until a right hand operating and left hand operating push button switches return to a first OFF state, and thereby, power supply to first and second circuits is cut off. |
