Kobelco Construction Machinery Co., Ltd.

Hideaki Fujiwara

Hidekazu Iwashita

An inner face of a flange of a winch drum is provided with a rope guide part that guides a rope portion in a higher layer such that the rope portion in the higher layer crosses a rope portion in a lower layer in a first crossing section, and a ridge line of the rope guide part has a shape that is displaced in a winding rotation direction with respect to a baseline passing through a rotation axis and an inner edge of the ridge line as proceeding from the inner edge to an outer edge.

Growing community of inventors

Hyogo, Japan

Hideaki Fujiwara