| 摘要 |
PURPOSE:To make a solidified cast part of a chain wheel and a cogwheel with small size and weight, where the small-sized cogwheel is formed at the periphery of a part of shaft at the drive side to be in engagement with an internal gear provided at the driving side in such a manner as moving vertically and to the right and left, as well as to ensure smooth winding operation by eliminating ununiform rotation of said chain wheel. CONSTITUTION:A handle is detained at a detent 5, a rotary shaft 4 is rotated in the lifting direction (clockwise), and an eccentric cam 6 is rotated eccentrically to the position shown by the dot and dash line. A square slide 7 put on an accentric cam 8 with loose fit, then, performs a synthesized motion composed of a rightward motion in guidance of a square hole 11 in a square frame 10 with a rotary shaft 4 as the center and a downward motion, normally to the former, in guidance of a guide face 12 of the square frame 10, and moves to the lower position at the right side shown by the dot and dash line. An internal gear 9 formed in pair with this square slide 7 moves, at the same time, with the rotary shaft 4 as the center to the lower position at the right side shown by the dot and dash line. A gear 15 at a chain wheel 13 to be in engagement with the internal gear 9, thus, turns with the rotary shaft 4 as the center in the lifting direction while reducing its speed. |
