초록 ▼

The present invention relates to a safety ensuring apparatus for ensuring the safety of an operator. A mechanical moving part is surrounded by a safety enclosure with a door of the safety enclosure provided with a door lock device constructed such that the door lock device releases a door lock when

The present invention relates to a safety ensuring apparatus for ensuring the safety of an operator. A mechanical moving part is surrounded by a safety enclosure with a door of the safety enclosure provided with a door lock device constructed such that the door lock device releases a door lock when a current is supplied from outside to excite a solenoid incorporated therein. The apparatus is constructed such that a lock is released when the mechanical moving part is stopped. Moreover, the construction incorporates a moving part monitoring sensor which monitors if the mechanical moving part is stopped. When mechanical moving part is stopped, the moving part monitoring sensor generates, without a negative operation, an output signal of logic value 1 corresponding to a high energy condition, and the solenoid of the door lock device is excited by this output signal. As a result, the lock of the door lock device is released once the mechanical moving part has stopped. Moreover, at the time of a sensor fault, the solenoid is not excited so that the lock of the door lock device is not released. Hence operator safety can be reliably ensured.

대표청구항 ▼

A safety ensuring apparatus wherein a mechanical moving part is surrounded by a safety enclosure, and a door lock means is provided in a door of the safety enclosure, said door lock means being constructed such that a lock is released when a current is supplied to excite a solenoid incorporated ther

A safety ensuring apparatus wherein a mechanical moving part is surrounded by a safety enclosure, and a door lock means is provided in a door of the safety enclosure, said door lock means being constructed such that a lock is released when a current is supplied to excite a solenoid incorporated therein, the apparatus being constructed such that said door lock means releases a door lock when the mechanical moving part is stopped, characterized in that the construction incorporates: a moving part monitoring sensor which monitors if the mechanical moving part is stopped, detects a stopped condition and generates a signal of logic value 1 corresponding to a high energy condition as a signal indicating a safe condition without carrying out a NOT operation, and the solenoid of said door lock means is excited by the output of logic value 1 from said moving part monitoring sensor, wherein said moving part monitoring sensor is a rotation stopped detection sensor which detects stopping of rotation of a motor, which constitutes a drive source for the mechanical moving part, as a non-conductive condition of the motor being logic value 1 corresponding to a high energy condition.