| 摘要 |
PROBLEM TO BE SOLVED: To provide a control board capable of surely arresting the opening operation of a door in a state that a power supply circuit is not interrupted by a simple structure even when the casting is opened or closed by three or more doors. SOLUTION: This control board comprises the casing having a main breaker or the like integrated thereto and four doors 21-24 for opening and closing the front opening part of the casing. Each of the doors is successively arranged so that the base ends or tip parts thereof are mutually adjacent, and a breaker handle 30 is mounted on the door 21 forming a reference door. Each of the doors further comprises engagement parts 21a, 21b, 22a, 23a, 23b, and 24a to be mutually engaged in the closing of the adjacent doors on the base end or tip part adjacent to the base end or tip part of the adjacent door. The opening operation of the doors except the reference door is arrested by the engagement of the engagement part provided one each door with the engagement part provided on the door adjacent to the reference door side. |
