| 摘要 |
PURPOSE:To promote a reduction in cost in decreasing the number of limit switches in use of control as well as to adjust both full-open and full-close positions of a disk part reflecting the rotational frequency of a driving shaft of a ventilator, in an on-off control mechanism of a ventilator. CONSTITUTION:A serialized constituent disk part 67 reflecting the rotation of a driving shaft of a ventilator consists of both bisymmetrical right disk part 71a and left disk part 71b. These respective right and left disk parts are composed of both first and second disk parts 72 and 73 integrally molded. In this constitution, a recess 74, where a contact roller 76a of a fully opening limit switch 65a is entered, is formed in the first disk 72. In addition, a projecting part 75 of the second disk 73 is unified with both symmetrical disk part. In the constitution like this, when being situated in the center of a recess 74 and adjustment of the disk part 67 is carried out at the full-open position, adjustment of the projecting part 75 in contact with a contact roller 76b of a malfunction preventing limit switch 65b is performed as well. |
