| 摘要 |
A stationary building structure having a sidewall opening with a shuttle section movable through the opening to an extended position or movable over the opening for closing thereof. The shuttle section includes a frame which defines a shuttle floor surface thereabove. A shuttle tail extends from the shuttle frame into the stationary building structure for supporting the shuttle section at all times whether in the extended position, the retracted position or moving therebetween. An outer shuttle wall extends upwardly from the frame for closing the sidewall opening of the stationary building when the shuttle is retracted. A sealing means is defined on the outer wall for engaging the building around the sidewall opening for selectively sealing thereof when in the retracted position. A drive mechanism is mounted to the stationary building structure and is operatively secured to the shuttle section for urging movement thereof between the respective positions.
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