Patent ID: 9488240
Filing Date: 2016-11-08
CPC Classification: E04H,F16F

Claim Text:
1. A friction damper comprising: a base body adapted to be capable of being attached to one of a pair of members which are displaced relative to each other; first and second supports each disposed within and secured to said base body and having an inner circular surface defining a circular through hole, said first and second supports being mutually adjacent in an axial direction, said first support having only one first slit communicating with the circular through hole of said first support so as to be reducible in diameter; a cylindrical rod which extends through the circular through holes of said first and second supports and has an outer circular surface, is movable in the axial direction with respect to said first and second supports, and is adapted to be capable of being attached to another one of the pair of members; a friction member which has a hollow cylindrical portion interposed between the inner circular surface of said first support and the outer circular surface of said rod, and only one collar united with said hollow cylindrical portion, said first and second supports between which said collar is disposed, clamping said collar without clearances between the first support and the collar, and between the second support and the collar, respectively so as to fix said friction member immovably with respect to the relative movement of the rod in the axial direction with respect to said base body; at least one deformable member interposed between said inner circular surface of said first support and an outer peripheral circular surface of said hollow cylindrical portion of said friction member to uniformly bring the hollow cylindrical portion of the friction member into contact with the rod by virtue of its deformability in the tightening of the hollow cylindrical portion of the friction member against the rod; and a tightening mechanism structured and positioned to reduce a width of the first slit of said first support to thereby tighten the hollow cylindrical portion of the friction member.