| 摘要 |
<p>PROBLEM TO BE SOLVED: To materialize a mobile crane intended for preventing a slide shoe from being deteriorated by smoothly supplying grease to the slide shoe between the outer cylinder and the inner cylinder of an extensible boom. SOLUTION: A grease discharge part 31a to discharge grease led from a grease supply tube 31 is disposed in the vicinity of a first slide shoe 21 provided on the inner ceiling 10a of an inner cylinder 10 extensible in an outer cylinder 9, and is moved together with the slide shoe 21. Thus, the grease can be uniformly supplied even to the tip side of the outer cylinder, and the slide shoe can be prevented from being deteriorated.</p> |
