Sliding Pin Lock Mechanism for Overhead Door with Microswitch

摘要

A door lock mechanism for an overhead door employs a sliding pin or rod that passes into the path of the rollers in the track, and obstructs the roller from movement in the direction to open the door. A spring in the door lock frame biases the sliding pin towards a proximal open position. The sliding pin has a swing arm that extends radially from the pin's proximal end, and which engages retaining structure at the proximal end of the door lock frame. In the lock position the distal end of the sliding pin blocks movement of wheels or rollers in the vertical track. The arm is rotated out of engagement with the retaining structure to release the pin so it may slide proximally to an unlocked position. A microswitch in the interior of the lock switches on when the sliding pin is moved to the locked position and turns off when the pin is returned to its unlocked position. A sleeve disposed over the proximal part of the spring engages the actuator of the microswitch.

主权项

1. A locking mechanism that attaches to the vertical track of an overhead door to hold the door locked in its lowered or closed position, the mechanism comprising:
a frame, including a distal mounting portion that is adapted to be affixed onto said vertical track, the frame extending proximally therefrom; a sliding pin that passes through an opening in the distal mounting portion of the frame, with an arm extending radially from a proximal end of said sliding pin; a spring contained within said frame and urging said sliding pin in a proximal direction; retaining structure at a proximal end of said frame for engaging said radial arm when the sliding pin is slid distally to a locked position, and the radial arm being capable of being rotated out of engagement therewith to permit the pin to slide proximally to an unlocked position; an electrical switch mounted within said frame, and having a switch actuator thereon which is movable between a first condition in which the microswitch is in one of an ON state and an OFF state and a second condition in which the microswitch is in the other of said states; and a switch actuating member affixed onto a portion of said sliding pin and engaging said switch actuator to urge the latter to its second condition when the sliding pin is slid distally to its locked portion to lock said overhead door, and which moves out of engagement with said switch actuator when the sliding pin is slid proximally to its unlocked position to permit the switch actuator to return to its first position.