To prevent an open/close key from being forgotten to pull out in an inspection door.

The inspection door 24 serves to make hard an access to a stacker crane, and includes a fixed part 30, a door 32, the open/close key 46, a lock 34 and a key insert 36. The door 32 can be opened/closed on the fixed part 30. The open/close key 46 has a key part 46a and a head 46b larger than the key part 46a. The lock 34 is provided to allow the open/close key 46 to be inserted in an opening direction of the door 32 on the fixed part 30, and can lock and unlock the door 32 by the open/close key 46. The key insert 36 is provided oppositely to the lock 34 on the door 32 and allows the key part 46a to be inserted into the lock 34 and to come into contact with the head 46b.

COPYRIGHT: (C)2010,JPO&INPIT