Movable barrier with two part guide follower

In an apparatus for controlling passage through a doorway, said apparatus comprising a guide positioned alongside the doorway and a roll door mounted to block the doorway selectively, the improvement comprising:

• a guide follower attached to the door to travel along the guide to control movement of the door, said guide follower comprising first and second parts, wherein one of the first and second parts is attached to the door, and the other of the first and second parts is positioned adjacent the guide;
• said first part comprising a mounting element and a first retainer element mounted to the mounting element to pivot about a pivot axis between a retaining position and a release position;
• said second part comprising a second retainer element configured and positioned (1) to engage the first retainer element when the first retainer element is in the retaining position to hold the first and second parts together, and (2) to disengage from the first retainer element by moving transversely to the guide when the first retainer element is in the release position to allow the first and second parts to separate from one another;
• and
• a releasable holding element coupled to the first retainer element to resist pivoting movement of the first retainer element to the release position, said releasable holding element allowing the first retainer element to pivot to the release position in response to forces on the door.

In an apparatus for controlling passage through an opening, said apparatus comprising a guide positioned alongside the opening and a movable barrier configured to selectively block the opening, the improvement comprising:

• a guide follower attached to the barrier and coupled to the guide to control movement of the barrier, said guide follower comprising first and second parts, wherein one of the first and second parts is attached to the barrier and the other of said first and second parts is positioned adjacent the guide;
• said first part comprising a mounting element and a first retainer element pivotably mounted to said mounting element, said first retainer element pivotable between a retaining position and a release position;
• said second part comprising a second retainer element configured and positioned (1) to engage the first retainer element when the first retainer element is in the retaining position to hold the first and second parts together, and (2) to disengage from the first retainer element when the first retainer element is in the release position to allow the first and second parts to separate from one another;
• wherein the first retainer element defines a slot that extends to a perimeter portion of the first retainer element, and wherein the slot is shaped to receive a portion of the second retainer element.

In an apparatus for controlling passage through a doorway, said apparatus comprising a guide positioned alongside the doorway and a roll door mounted to block the doorway selectively, the improvement comprising:

• a guide follower attached to the door to travel along the guide to control movement of the door, said guide follower comprising first and second parts, wherein one of the first and second parts is attached to the door, and the other of the first and second parts is positioned adjacent the guide;
• said first part comprising a mounting element and a first retainer element mounted to the mounting element to pivot about a pivot axis between a retaining position and a release position;
• said second part comprising a second retainer element configured and positioned (1) to engage the first retainer element when the first retainer element is in the retaining position to hold the first and second parts together, and (2) to disengage from the first retainer element when the first retainer element is in the release position to allow the first and second parts to separate from one another;
• and
• a releasable holding element coupled to the first retainer element to resist pivoting movement of the first retainer element to the release position, said releasable holding element allowing the first retainer element to pivot to the release position in response to forces on the door;
• wherein the first retainer element defines a slot that extends to a perimeter portion of the first retainer element, and wherein the slot is shaped to receive the second retainer element.