Slide flange

1. A slide flange for use with a rotary body having a clutch rotatable about an axis and a pair of proximity sensors apart from each other in a circumferential direction, comprising:

an inner ring portion fitting on the rotary body and movable in a direction along the axis from a first position where the clutch gets connected to a second position where the clutch gets disconnected;

an outer ring portion unitarily elongated from the inner ring portion and so disposed as to face the pair of proximity sensors at least at the second position;

a plurality of notches formed on the outer ring portion at even intervals in the circumferential direction; and

a coupling portion elongated from the outer ring portion toward the rotary body, the coupling portion being so coupled with the clutch as to rotate the outer ring portion along with the clutch.

2. The slide flange of claim 1 , wherein the outer ring portion is a circular disk elongated radially from the inner ring portion and perpendicular to the axis, or a cylinder elongated in parallel with the axis from the inner ring portion.

3. The slide flange of claim 1 , wherein the plurality of notches is so disposed as to make a distance in the circumferential direction between the pair of proximity sensors be not an integral multiple of the intervals in the circumferential direction between the notches.

4. The slide flange of claim 1 , wherein a width of each of the notches is smaller than a span between the pair of proximity sensors.

5. The slide flange of claim 4 , wherein a width of each of the notches is larger than a detection width of each of the proximity sensors.