To provide an arm member capable of securing flexibility along the vertical direction and rigidity along the lateral direction even when the weight is reduced, and a vehicle such as a motorcycle equipped with the arm member.
In this arm member (head pipe 60hp), an end rotatably supports a wheel of the vehicle, and the other end is supported by a vehicle body frame of the vehicle around a pivot extending almost to the horizontal direction so as to be capable of being rocked along the perpendicular direction. A closed section part wherein the vehicle width directional section parallel to the pivot is the closed section is provided in the arm member, the arm member is provided with a plate shaped reinforcing part 602L (602R) connecting a lateral direction inner wall surface which is an inner wall surface of the closed section part separated along the pivot direction parallel to the pivot, and extending to the almost horizontal direction.
Iwa Saki Kokuni
Akira Kurihara
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
Next Patent: CONSTRUCTION METHOD OF LARGE STRUCTURE IN SPACE