Importance

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Abstract

An open and close apparatus for a shelter of a boarding bridge includes at least one extension arm means provided on the portal frame, each extension arm means comprising: an upper arm having one end pivotally coupled with a column of the portal frame; a lower arm having one end pivotally coupled with the other end of the upper arm and the other end pivotally coupled with an upper end of the flexible frame; a propeller controlled by a control system and including an extension rod and a main body for accommodating the extension rod, wherein one end of the extension rod is pivotally coupled with the lower arm, and one end of the main body is pivotally coupled with the upper arm; and overpressure protection means for buffering an acting force between the shelter and the aircraft shell, and the overpressure protection means is connected to the control system such that when the acting force exceeds a predetermined value, the control system controls the propeller to stop protruding and/or contracting the extension rod. The open and close apparatus in the present invention can perfectly seal with an entrance of an aircraft with a large profile curve variety and is simple in configuration, and can prevent the aircraft shell from distortion or damage when the aircraft shell squeezes or collides with the shelter.

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First Claim