DOOR LOCK SYSTEM FOR ELECTRIC BOX

PURPOSE:To lock a door tightly while allowing door opening operation with a normal tool by constituting a locker such that a lock piece can advance/ retract freely in the advancing direction. CONSTITUTION:A sliding face 36 for a lock piece 13 is provided on one side in a space for allowing intrusion of the lock piece 13 while a guide face 39 is provided on the other side. Furthermore, a locker 41 is disposed between the space and the guide face 39. When a door 7 is closed gradually with respect to a body 2, the lock piece 13 intrudes into an intrusion space in a lock system while enlarging the gap between the sliding face 36 and the locker 41. Upon stoppage of the lock piece 13, the locker 41 is wedged between the lock piece 13 and the guide face 39 thus blocking the lock piece 13 from returning. When a rod member is inserted into a through hole 54 made through the door and the locker 41 is pushed, wedge function is released to allow retraction of the lock piece 13.