| 摘要 |
PROBLEM TO BE SOLVED: To protect a cooling fan from external pressing force, in control board (cabinet) work.SOLUTION: A fan mounting structure of cabinet is constituted of a cooling fan pressed by a spring against a frame plate provided on the ceiling of the cabinet from below and secured in place, and a support for sinking the cooling fan downward when it is stepped from above. The fan mounting structure of cabinet is further provided with a switch that is turned on when the cooling fan sinks, and a cut-off circuit for detecting the on-contact of the switch and turning a power supply, for supplying power to the cooling fan, off. |
