| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid sealed-in type vibration-proofing device which can improve a sense of walking when a person walks on a floor, and which can enhance sound suppression performance against floor impact sound. SOLUTION: This liquid sealed-in type vibration-proofing device comprises: a first mounting member 1; a rubber elastic body 2, one end side of which is fixed to the first mounting member 1 and the other end side of which is provided with an opened recess 21; a second mounting member 3 which is fixed to the other end side of the elastic body 2; a diaphragm 4 which closes the opening of the recess 21 of the elastic body 2 so that the liquid chamber 45 with a sealed-in liquid L can be formed between the diaphragm 4 and the recess 21; and a partition member 5 which is arranged near the opening of the recess 21, so as to partition the liquid chamber 45 into a main liquid chamber 46 and an auxiliary liquid chamber 47, communicating with each other via upper and lower orifice passages 53 and 54. The upper and lower orifice passages 53 and 54 are made longer, so that attenuation can be enhanced by setting a loss factor value in the range of 1-10 on condition that a frequency domain of vibrations caused by walking on a floor is in the range of 10-30 Hz. COPYRIGHT: (C)2006,JPO&NCIPI |
