| 摘要 |
PROBLEM TO BE SOLVED: To provide a boarding bridge capable of suppressing the risk of tumbling or the like by eliminating a step between traffic passage of adjoining passages. SOLUTION: The boarding bridge 1 to make expansion and contraction in making relative movement in the longitudinal direction N is structured so that a base-end tunnel 7 and an extremity tunnel 9 are fitted to each other in a telescopic form, in which the extremity tunnel 9 is located outside of the base-end tunnel 7, wherein a variable length passage 27 of the extremity tunnel 9 is configured movable between an traffic passage 29 set at the prescribed level and an extra-passage position located below the traffic passage 29, and the length in the longitudinal direction of the traffic passage 29 is arranged changeable complying with the moving distance in association with the movement relative to the base-end tunnel 7. COPYRIGHT: (C)2009,JPO&INPIT
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