| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an outrigger device capable of retraction and extension in a narrow space. <P>SOLUTION: The outrigger device includes: a jack box 30 composed of an outer tube 31, an intermediate tube 32 and an inner tube 33; a jack cylinder 40 in which a rod 41 is fixed to the outer tube 31; a first fixing means for fixing a cylinder 42 to the inner tube 33; a second fixing means for fixing the cylinder 42 to the intermediate tube 32; a third fixing means for fixing the contracted intermediate tube 32 in the outer tube 31; and a fourth fixing means for fixing the extended inner tube 33 in the intermediate tube 32. Since retraction and extension can be done by expanding and contracting the jack box 30, the retraction and extension can be done in a narrow space. The jack box 30 can be expanded and contracted by expanding and contracting one jack cylinder 40 with a short stroke, thereby providing a lightweight and inexpensive outrigger device. <P>COPYRIGHT: (C)2013,JPO&INPIT |
