| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an economical crane having a seismic isolation structure that can obtain a large slide distance corresponding to large seismic movements. <P>SOLUTION: In the crane 1 which includes a traveling device 4 and a sill beam 5 fixed to an upper part of the traveling device 4 and extending in the traveling direction y, a seismic isolation unit 2 is arranged between the traveling device 4 and the sill beam 5. The seismic isolation unit 2 includes two traveling-device-side arms 10 arranged on an upper part of the traveling device 4 in a projecting manner, two link members 11 respectively suspended from the traveling-device-side arms 10, and two sill-beam-side arms 12 fixed to the sill beam 5. Upper parts of the link members 11 are connected to the traveling-device-side arms 10 in a tiltable manner, and lower parts of the link members 11 are connected to the sill-beam-side arms 12 in a tiltable manner. The traveling-device-side arms 10 suspend the sill beam 5. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
