A pulling wire 10, a joystick 8, a pulley 21 capable of providing a pull assisting force to the pulling wire 10 by rotation, a C-shaped ring 22 that contacts the pulley 21 with a friction force with an input operation of the joystick 8 and thereby transmits the rotation of the pulley 21 to the pulling wire 10 are provided, and at the C-shaped ring 22, there is provided an end portion 22it of a cutout portion K that removes wear debris that is scraped from the pulley 21 with contact of the C-shaped ring 22 with the pulley 21 from the pulley 21.
