Abstract
We previously proposed a semi-active operation assist handle for manual conveyance of flexible part. The assist handle consists of a handle, a variable damper and a mechanical spring. The assist-handle can be attached to a general hand cart, through which a human operates the hand cart. In this paper we verified the work efficiency of manual conveyance of flexible part by using the assist-handle. For this purpose, a one-degree of freedom force display device was used to simulate the behavior of the assist-handle, the cart and the flexible part. Furthermore, we considered the work efficiency by evaluating the attenuation of the residual vibration of the flexible part and the conveyance time.