To surely transmit the rotating operation of one shaft irreversibly to the other shaft by improving an operability.

A brake part 30 comprises a brake drum 20 having a bottom plate 24, a brake shoe 31 coaxially installed in the brake drum 20, a brake spring 32 installed between the inner peripheral surface of the brake drum 20 and the outer peripheral surface of the brake shoe 31, an input shaft 50 disposed at the center positions of the brake drum 20 and the brake shoe 31 and operable from the outside, and an output shaft 60 opposed to the input shaft 50 in the brake shoe 31. The clutch part 40 is formed so that the rotation of the input shaft 50 is transmitted to the output shaft 60 only during the forward rotation and the rotation of the input shaft 50 is not rotated to the output shaft 60 during the reverse rotation by reciprocatingly rotating the input shaft 50 around the axis thereof.