发明授权
US4728312A Lift device for toy track way 失效
用于玩具轨道的升降装置

Lift device for toy track way
摘要:
An endless toy track way is described, including a lift device; a rail connected at its ends to the lift device; and a moving body which rolls via gravity on the rail and is lifted by the lift device. The lift device includes a pair of parallel, spaced, fixed stairs and a pair of vertically movable plates formed with engaging steps at their upper edges and being arranged longitudinally inside of the pair of fixed stairs. This pair of vertically movable plates is engaged with cams of a driving mechanism to cause the movable plates to alternately move in circular paths and ascend and descend. The moving body is provided at both lower sides thereof with projections which are engageable with the engaging steps of the vertically movable plates so that the moving body is carried onto succeeding stairs of the fixed stairs, one after the other.
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