Guard members for preventing shifting cargo from interfering with the operation of a roll-up door

Abstract From the Canadian patent

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 interfering 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 …