| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive friction damper for a crane stay, for safely performing the seismic response control action, even by the damper of a simple structure by only friction, by adjusting the stay length being an initial value. <P>SOLUTION: This friction damper 1 for the crane stay includes an inner cylinder 3 and an outer cylinder 2 mutually sliding via a friction material 5 for providing predetermined frictional force, is constituted so that a relative position between the inner cylinder 3 and the outer cylinder 2 can be adjusted by force of the predetermined frictional force or more, and safely performs the seismic response control action by the presence of a regulating mechanism, even by the damper of the inexpensive and simple structure by only the friction, by increasing allowable capacity for interposing the crane stay 9 to an installation dimensional error between a tower crane and a building in construction, by arranging the regulating mechanism (such as a slipping-out preventive bolt) 6 so that the relative position between the inner cylinder 3 and the outer cylinder 2 does not become larger than a predetermined interval. <P>COPYRIGHT: (C)2012,JPO&INPIT |
