Pivoting bottom bar for roll-up door

A bottom bar apparatus for a roll-up door curtain having an upper end attachable to a curtain winding mechanism, a lower end, and two side edges, said door curtain being mountable at a door opening having two opposite vertical sides, said bottom bar apparatus comprising:

• an elongate bottom bar mountable on said lower end of the door curtain so as to extend at least most of the length of said lower end;
• two bar connectors for slidably connecting opposite ends of said bottom bar to respective elongate guide members mountable along said opposite vertical sides of the door opening when said door curtain is installed;
• two pivot mechanisms each pivotably joining a respective one of said bar connectors to a respective one of said ends of the bottom bar, each pivot mechanism including a pivot shaft having a central pivot axis and a shaft receiver into which the pivot shaft extends, each pivot shaft being pivotable in its shaft receiver about its central pivot axis, one of each pivot shaft and its shaft receiver being connected to a respective one of the bar connectors and the other of each pivot shaft and its shaft receiver being mounted on the bottom bar;
• and
• at least one stop device arranged to limit pivotal movement of the bottom bar, the or each stop device including a stop member mounted on one of the group consisting of its respective pivot mechanism and the adjacent bar connector so as to restrict pivotal movement of its pivot shaft relative to its shaft receiver during use of the roll-up door curtain when the curtain is subject to windload or greater air pressure on one side of the curtain compared to the other side of the curtain.

A bottom bar apparatus for a roll-up door curtain having opposite upper and lower ends and two opposite side edges, said door curtain being mountable in a door opening having two opposite vertical sides along which extend respective elongate door guide units, said bottom bar apparatus comprising:

• an elongate bottom bar mountable on said lower end of the door curtain;
• two bar connectors for slidably connecting opposite ends of said bottom bar to said guide units, each bar connector including a metal plate and two elongate connector stops mounted on opposite sides of said metal plate and extending in a direction substantially perpendicular to the length of the bottom bar;
• and
• two pivot mechanisms each pivotably joining a respective one of said bar connectors to a respective one of said ends of the bottom of a bar, each pivot mechanism including a pivot shaft connected to one of a group consisting of said bottom bar and a respective one of the bar connectors, and a shaft receiver into which said pivot shaft extends, said shaft receiver being mounted on the other of said group consisting of said bottom bar and a respective one of the bar connectors,
• wherein each pivot mechanism includes at least one stop device to limit pivotal movement of the bottom bar, the or each stop device including a stop member mounted on the respective pivot shaft and a cooperating slot into which said stop member extends, said slot being formed in the respective shaft receiver.