Abstract: A jig for tightening a bolt includes: a support unit standing on the floor of a work place and extending toward the bottom side of a car body which is conveyed by an overhead hanger; a movable unit connected to the support unit so as to be movable in a transverse direction, a longitudinal direction, and a height direction of the car body; a fastening part disposed in the movable unit to fasten chassis components to the bottom side of the car body; a load compensating part compensating load of the fastening part when the fastening part ascends/descends toward/from the bottom side of the car body; a tilting part adjusting a position of the fastening part; and a reaction force regulating part sustaining reaction force that is generated while the fastening part is operated.

Abstract: A jig for tightening a bolt includes: a support unit standing on the floor of a work place and extending toward the bottom side of a car body which is conveyed by an overhead hanger; a movable unit connected to the support unit so as to be movable in a transverse direction, a longitudinal direction, and a height direction of the car body; a fastening part disposed in the movable unit to fasten chassis components to the bottom side of the car body; a load compensating part compensating load of the fastening part when the fastening part ascends/descends toward/from the bottom side of the car body; a tilting part adjusting a position of the fastening part; and a reaction force regulating part sustaining reaction force that is generated while the fastening part is operated.