Abstract: A self-tightening side lock (20) for a roll-up door includes a keeper (25) mounted on the jamb, and a latch member (26) pivotally mounted on a door panel. The latch member is selectively cooperable with a catch (30) to hold the door in a closed position. The latch member is biased to move in a counter-clockwise direction. The latch member is adapted to be moved in a clockwise direction, against the opposing bias or a spring 42, to an out-of-the-way position at which the displaced latch may pass by the catch. The latch member has a side cam surface (33) arranged to engage the catch (30) when the door is lowered and to cause the latch member to pivot in a clockwise direction toward the out-of-the-way position to allow the latch member to pass by the catch. The latch member also has an upper cam surface (34) arranged to engage the catch such that the counter-clockwise movement of the latch member will cause the door to be self-tightening.

Abstract: A side lock (20) for a roll-up door (21) mounted on a body includes a keeper (27) mounted on a jamb (23) adjacent an access opening (22). A hook member (28) is pivotally mounted on a panel (25) and is arranged to selectively engage a catch (59) mounted on the keeper. The hook member has an upper cam surface (76) and a concave surface (78). The hook member also has a lower cam surface (75) which is adapted to selectively engage the catch when the door is lowered to selectively displace the hook member against the opposing bias of a spring (91) to permit the tip (66) of the hook member to pass beneath the catch. The improved side lock is self-tightening.

Abstract: This invention provides two forms of improved guards for a roll-up door. The first form ( 58 or 59) is intended to prevent shifting cargo from intefering with becoming interlocked with the lowered door. This form has a vertically-elongated guard which is adapted to overlie the vertically-spaced hinges, and has opposite marginal end portions closely spaced to the knuckle portions of such hinges. This first form reduces the stepped configuration of prior art hinges, and therefore reduces the opportunity for shifting cargo to become interlocked with the door. The second form (111) is mounted on the door and track, and is designed to prevent shifting cargo from entering the space through which the door must pass as it its raised or lowered.

Abstract: A seal member (11) is adapted to seal the gap or space between a door panel (12) and frame (13) of a roll-up door assembly (10). The improved seal member includes a first portion (34) and a second portion (35). The first portion is mounted on the frame, and the second portion is biased to flexibly engage the outer surface of the door panel. The first portion is formed of a relatively-rigid vinyl, while the second portion is formed of a relatively-flexible vinyl, or may be in the form of a brush. The first portion has a raised abutment surface (42) arranged to engage the door panel, should the door panel move toward the frame, to prevent the second portion from becoming crushed between the first portion and the door. Thus, the second portion is protected from damage, and does not substantially impede vertical movement of the door. The first and second portions may be formed integrally or separately, as desired. In one form, the seal member first portion is adapted to be snapped into engagement with the frame.

Abstract: Overhead door construction for a truck van or the like including metal door sections pivotally connected by the rigid part of a dual durometer plastic hinge member having a flexible part for sealing the joint between adjacent door sections when the door is closed.

Abstract: An upwardly-acting door structure is adapted to close an access opening of a body member, such as an automobile-carrying railroad car. The door structure includes a stationary track on either side of the opening, movable tracks mounted for upward and downward movement along the stationary tracks, an upper panel mounted on the movable tracks, a lower panel mounted to move upwardly and downwardly along the movable tracks at twice the speed, flexible chains arranged to interconnect the lower panel with the movable tracks, torsional springs arranged to counterbalance and support the aggregate weight of the raised movable tracks, and handles operatively arranged to raise and lower the movable tracks. The upper and lower panels may be raised to uncover the access opening, or lowered to cover the access opening.