Patent ID: 9041258
Filing Date: 2015-05-26
Classification: B23Q,F16P,Y10T

Abstract:
1. A machine tool, comprising: a door configured to separate a processing area and an outside of the machine and to be openable/closable; a door closed state detection mechanism which detects that the door is located at a predetermined closed position; a door lock mechanism which locks or unlocks the door; and an interlock mechanism which allows a processing operation when the door is located at the predetermined closed position and is in a locked state, wherein the door lock mechanism has a keyhole to which a key member is attachable and outputs a key attached signal indicating a state that the key member is attached to the keyhole or a key unattached signal indicating an unattached state, wherein the interlock mechanism allows the door lock mechanism to bring the door into an unlocked state in a state that an unlock condition of the door is established and when the key unattached signal is inputted and, after the door is unlocked, allows the door lock mechanism to bring the door into the locked state only when the key attached signal is inputted in a state that the door closed state detection mechanism detects that the door is located at the predetermined closed position, wherein when the key member is attached to the keyhole when the door is in an open state, the key member prevents the door from being located at the predetermined closed position.