Friction damper with V-groove

A V-groove friction damper comprising:

• a V-groove member including a concave V-shaped groove that is formed on at least one of a top surface and a bottom surface thereof as a left inclined surface and a right inclined surface meets each other at a central portion of a left/right direction, each of the left inclined surface and the right inclined surface being arranged along a straight line in the left/right direction;
• a V-shaped frictional contact member including a V-shaped frictional contact portion having a left contact surface that comes in contact with the left inclined surface and a right contact surface that comes in contact with the right inclined surface by being coupled to the central portion of the left/right direction, each of the left inclined surface and the right contact surface being arranged along a straight line in the left/right direction;
• a guide member configured to guide a left/right movement of the V-groove member;
• and
• an elastic compression unit installed on the guide member, and configured to elastically compress the V-shaped frictional contact member toward the V-groove member,
• wherein, when the V-shaped frictional contact member is positioned at a left side of the central portion of the left/right direction, only the left contact surface is in plane contact with, and elastically compresses, the left inclined surface so as to provide a restoring force to move the V-groove member leftward, and when the V-shaped frictional contact member is positioned at a right side of the central portion of the left/right direction, only the right contact surface is in plane contact with, and elastically compresses, the right inclined surface so as to provide a restoring force to move the V-groove member rightward.