Lock-up device for torque converter

A lock-up device for a torque converter, the lock-up device being disposed between a front cover coupled to an engine-side member and a turbine of the torque converter, the lock-up device being configured to mechanically transmit torque from the front cover to the turbine, the lock-up device comprising:

• a piston disposed to be axially movable;
• a clutch part configured to transmit torque from the front cover to an output side in conjunction with moving of the piston;
• a first plate into which torque is inputted from the front cover through the clutch part, the first plate having a first elastic member accommodating portion;
• a second plate coupled to the turbine, the second plate having a second elastic member accommodating portion, the second elastic member accommodating portion being disposed axially in opposition to the first elastic member accommodating portion;
• a support member supporting the second plate in order for the second plate to be rotatable relatively to the first plate within a predetermined angular range and to be axially immovable relatively to the first plate;
• and
• a first elastic member being disposed axially between the first elastic member accommodating portion and the second elastic member accommodating portion, both circumferential ends of the first elastic member being configured to be engaged with a circumferential end of the first elastic member accommodating portion and a circumferential end of of the second elastic member accommodating portion, the first elastic member elastically coupling the first plate and the second plate in a rotational direction.