| 摘要 |
PROBLEM TO BE SOLVED: To travel a crane while safety is secured by forming a large number of slit grooves extending in the direction crossing the rolling direction of a wheel in the outer peripheral surface of an outer wheel. SOLUTION: This running wheel 1 is formed by mounting an outer wheel 3 made of synthetic resin on a metallic inner wheel, and a gear 1 for receiving driving force from a traveling motor inside in which a crane girder constructed in a saddle is extended is integrally formed with the inner wheel 4. Slits 8 extending in the direction orthogonal to the rolling direction of the traveling wheel 1 are cut at equal spaces in the outer wheel 3 made of urethane rubber. Thus, the frictional force of the wheel to a runway girder is increased and influence of an oil film deposited on the runway girder can be restrained to reduce the slipping risk of the traveling wheel. Thus, safe running of the crane can be performed.
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