| 摘要 |
PROBLEM TO BE SOLVED: To provide a traveling vehicle with a crawler, provided with an idler wheel from which the crawler can be simply removed, and which is extensible and rotatable. SOLUTION: In this traveling vehicle, the crawler is installed on a drive sprocket, an equalizer wheel 86, and the idler wheel 85. A circularly cylindrical idler frame 122 is extensibly included inside a circularly cylindrical tension frame 122 to make the idler frame rotatable. The idler wheel is thus provided on a tip of the idler frame to freely rotate. COPYRIGHT: (C)2007,JPO&INPIT
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