Patent ID: 8261394

Claim:
An apparatus for moving a tunnel part of a boarding bridge, including a tunnel having a first tunnel part, a second tunnel part, and a third tunnel part in sequence and that can be moved so that the second tunnel part and third tunnel part are placed in contact and connected to each other based on the first tunnel part, the apparatus comprising: a first rope with one end coupled with the first tunnel part and another end coupled with the third tunnel part; a first pulley that is fixedly coupled to the second tunnel part so that the first rope can be wound at a position that is separated in an expanding direction of the tunnel length from the other end of the first rope and is interlocked and moved in accordance with moving displacement of the other end of the first rope; a second rope that is installed separately from the first rope with one end coupled with the first tunnel part and another end coupled with the third tunnel part; a second pulley that is fixedly coupled to the second tunnel part so that the second rope can be wound at a position that is separated in a contracting direction of the tunnel length from the one end of the second rope and is interlocked and moved in accordance with moving displacement of the other end of the above-mentioned second rope; and a mechanism for moving the third tunnel part relative to the first tunnel part, wherein the ropes and pulleys cause movement of the second tunnel part between the first tunnel part and the third tunnel part responsive to the mechanism moving the third tunnel part.