| 摘要 |
A stair-climbing wheelchair carrier has a frame body, a pair of rail frames formed in a lower portion of the frame body and a pair of endless belt crawlers engaged with the wheels provided on the frame body and with the rail frames. A travelling wheel mechanism is provided on each of the rail frames at a rear portion thereof. The travelling wheel mechanism comprises a lever rotatably mounted on the rail frame, a pair of travelling wheels provided on both ends of the lever, and a spring for maintaining said travelling wheels in a position parallel with the grounding surface of the crawlers. Both the travelling wheels are so disposed that contact points with the ground are at lower positions than the grounding surface of the crawlers. |
