Release mechanism for industrial doors

A method for providing separation of an industrial door which is movable between blocking and unblocking positions relative to a doorway, from an associated track for a force applied to the industrial door having a component perpendicular to the plane of the doorway and above a certain magnitude, the method comprising:

• providing a track along the doorway;
• providing the industrial door with extension members having lateral edges received within and guided by the track as the industrial door moves between the doorway blocking and doorway unblocking positions;
• in response to a breakaway force applied to an extension member, moving the track to a position where it does not impede movement of the extension member in a direction perpendicular to the plane of the doorway by transmitting the force to a separate resilient member disposed between the track and a fixed member and by compressing and deforming the resilient member which is sufficient to permit the lateral edge and extension member to escape from and separate from the track.

A method for providing separation of an industrial door which is movable between blocking and unblocking positions relative to a doorway, from an associated track for a force applied to the industrial door having a component perpendicular to the plane of the doorway and above a certain magnitude, the method comprising:

• providing a track along the doorway;
• providing the industrial door with extension members having lateral edges and rollers coupled to the lateral edges and received within and guided by the track as the industrial door moves between the doorway blocking and doorway unblocking positions;
• in response to a breakaway force applied to an extension member, moving the track to a position where it does not impede movement of the extension member and coupled rollers in a direction perpendicular to the plane of the doorway by transmitting the force to a separate resilient member disposed between the track and a fixed member, and by compressing and deforming the resilient member which sufficient to permit the rollers to escape from and separate from the track.