| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamic damper for a house, which offers an excellent reliability in temperature dependability, amplitude dependability or the like and also is capable of displaying good sound insulating performance against an impact noise caused by a heavy object dropped to a floor. SOLUTION: The dynamic damper comprises a pair of installing members 1a and 1b attached with a certain distance held between them in an inner space of a web of a C-type steel channel 5; a columnar massive member 2 located between the pair of installing members 1a and 1b; and a pair of a rubber elastic bodies 3a and 3b elastically supporting both the ends of the massive member 2 attached to the installing members 1a and 1b with its resonance frequency tuned to a range of 30 to 90 Hz. The rubber elastic bodies 3a and 3b, each being shaped to a cylindrical shape, are arranged in such a manner that a shearing deformation occurs in a radial direction when a vibration input is applied with characteristics wherein the value of tanδbecomes more than 0.01 but less than 0.1. COPYRIGHT: (C)2007,JPO&INPIT
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