| 摘要 |
PROBLEM TO BE SOLVED: To provide a jib storage device capable of overhangingly storing a jib with its telescopic boom fully contracted by constituting a jib support device in such a state as rotating the jib with a support pin used as a support, with the tip boom fully contracted, and without using the telescopic operation of a telescopic boom and capable of engaging/disengaging it as its boom fully contracted. SOLUTION: First jib storage means 60 disposed in a base boom base side, second jib storage means 70 stored in a base boom tip side, and overhung storage auxiliary means 80 overhangingly storing the jib 40 are interposed between the jib 40 in the stored state in the base boom side part 35 of the telescopic boom 30 and the base boom 31. The overhung storage auxiliary means 80 drives the jib 40 to approach to or to separate from the base boom side 35 with the jib 40 pivotally supported to the support pin 46 so as to engage/disengage the jib 40 to/from the base boom 31 by the first jib storage means 60. COPYRIGHT: (C)2003,JPO
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