| 摘要 |
PURPOSE:To enable a rotary moving amount of a sheave to be accurately transmitted to a rotor of an encoder by constituting a structure so as to always apply to the sheave a predetermined load of normal toward the axial line of the sheave. CONSTITUTION:In case of arranging a rotor 4 of an encoder 3 on the circumferential surface of a sheave 1, first in a condition that a spring 19 is released, a movable bracket 7 is turned while turning an arm member 9. Here a rod 17 moves its penetrating part in a long hole of a bracket 15 in almost a dogleg shape. Next, when an axial line A3 of the sheave 1 or a shaft 24 is positioned in a plane containing an axial line A1 of a signal forming part 6, axial line A2 of a supporting part 10 in the arm member 9, center line C1 of a connection material 18 and the center line C2 of the rod 17, the spring 19 is compressed by a nut 22 and given predetermined urging force. Thus in a contact part of the rotor 4 with the circumferential surface of the sheave 1, a predetermined load of normal toward the axial line A3 of the sheave 1 is always applied to the sheave 1, and its rotary moving amount can be accurately transmitted to the rotor 4. |
