PROBLEM TO BE SOLVED: To provide a torsional vibration absorber capable of removing torsional vibrations more efficiently while making changes of respective parts of the conventional devices unnecessary or minimum.SOLUTION: The torsional vibration absorber includes a first member 1 rotating around a center shaft S1, a second member 2 rotating around a center shaft S2 and a coil spring 3 whose one end 31 is restrained with the first member 1 and the other end 32 is restrained with the second member 2. The torsional vibration absorber further includes a restriction means R which restricts the first member 1 and the second member 2 to each other so as to perform relative rolling while causing the center axes S1, S2 to accord with each other and a regulation means which regulates a relative rolling angle between the first member and the second member 2, wherein the regulation means contains one or a plurality of first projections 12B extended in the direction of the second member 2 from the first member 1, and one or a plurality of second projections 22B extended in the direction of the first member 1 from the second member 2 so as to interfere with the circumferential direction of the first or the second member with respect to the first projection 12B.COPYRIGHT: (C)2012,JPO&INPIT【課題】既存の装置類の各部の変更を不要もしくは、最小限としつつ、より効率的に捩じり振動を除去することが可能な捩じり振動吸収装置を提供する。【解決手段】中心軸S1周りに回転する第1部材1と、中心軸S2周りに回転する第2部材2と、一端31が第1部材1に、他端32が第2部材2に係止されたコイルバネ3と、を備え、中心軸S1,S2を一致させて相対軸転するように第1部材1と第2部材2とを相互に拘束する拘束手段Rと、第1部材1と第2部材2との相対軸転角を規制する規制手段と、を備えており、規制手段は、第1部材1から第2部材2の方向へ延出させた1または複数の第1突起12Bと、第2部材2から第1部材1の方向へ、第1突起12Bに対して第1または第2部材の周方向に干渉するように延出させた1または複数の第2突起22Bと、を含んでいる。【選択図】 図2
