SASH ROLLER FOR FOLDABLE DOOR

PROBLEM TO BE SOLVED: To prevent unreasonable force from acting on a roller at time of door opening/closing. SOLUTION: A sash roller for a foldable door has a cylindrical main body 30 installed in a suspending side stile 19 of a door, a cam member 40 installed in this main body 30 and a rotary piece 50 which has a roller 60 and is fitted to and inserted into the main body 30 so as to be rotatable and vertically freely movable, and a cam part 52 to contact with a cam surface 43 of the cam member 40 is formed above this rotary piece 50, and a pair of guide pieces 55 opposed to both side surfaces of a rail 11a with which the roller 60 contacts, are arranged under the rotary piece 50. In this case, the rotary piece 50 is nonrotatably supported on a pair of guide pieces 55 at time of door opening/ closing, and unreasonable force is prevented from acting on the roller 60.