PURPOSE: To enhance the reliability in a simple structure by employing a sliding member to which the rollers having specified structure are attached.
CONSTITUTION: The sliding member 5 can be slid in the direction at a right angle with the axis of a supporting pole 2. To the swelled end part 5a of the sliding member 5, is attached a pair of rollers, whose axes are at a right angle each other, at the symmetrical position with respect to the axis of the sliding member 5. Then, the supporting pole 2 is approached to the cable path with a feed screw 3, and the cable C runs with the rollers 6 and 6 contacted with the cable C. If there is the variation in the outer diameter of the cable C, the slide member 5 moves back and forth depending on the variation in the diameter of the cable, and a lever 9 moves via a link 10. When the variation in the cable diameter to the plus side exceeds the allowable limit, a contactless switch 11 is operated.
KUMAZAWA HIDENOBU
HAGIWARA MASAMI
