Apparatus for moving tunnel part of boarding bridge

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;
• the second pulley has a rotational shaft tilted from a direction perpendicular to the moving direction of the second tunnel part and third tunnel part between a bottom plate of the first tunnel part and a bottom plate of the third tunnel part so that contact with one end of the second rope and contact with the other end of the second tunnel part are at different heights;
• the second pulley includes a bearing base that is coupled in a tilted state from a direction perpendicular to a moving direction of the second tunnel part and third tunnel part to a rotational shaft fixer that forms a pair of separated protruded parts between the bottom plate of the first tunnel part and the bottom plate of the third tunnel part and is fixedly coupled, and comprising:
• a bearing that is coupled with an outer peripheral part of the bearing base;
• and
• a roller that is equipped with a connecting surface capable of rotating in an extending direction of the second rope and is coupled with an outer peripheral part of the bearing.