Patent ID: 8739957

Claim:
An acceleration and deceleration device comprising: a chain that is endlessly guided along a predetermined first track; a U-shaped member of which a terminal end portion is attached to the chain so as to be swingable and a part from an intermediate portion to a front end portion is formed as two parallel members and which has a long and narrow U-shaped groove between the parallel members; a subject moving body that has a driving shaft sliding inside the U-shaped groove of the U-shaped member; and a swing yoke that is provided so as to intersect with the U-shaped member; a skip rail that guides the swing yoke along a predetermined second track; and a travel support roller guiding rail that guides the driving shaft along a predetermined track, wherein the driving shaft of the subject moving body is rotatable with respect to the U-shaped member within a predetermined range in the U-shaped groove of the U-shaped member, the driving shaft of the subject moving body is slidable with respect to the U-shaped member in the U-shaped groove of the U-shaped member, the first track and the second track are different so that a rotation angle of the U-shaped member can be changed when the U-shaped member is driven along the first track, and the first track and the second track are formed so that the driving shaft guided by the travel support roller guiding rail is driven to slide in the U-shaped groove when the U-shaped member is moved along the first track while changing the rotation angle.