Bi-swing warehouse door latch system

摘要

A bi-swing warehouse door latch system installs an electro-mechanical lock horizontally in the door casings overhead. Each has two catches to drop down on either side of the door. The doors are allowed to swing open when the respective catches are unlatched by a solenoid. The doors are not allowed to swing open when the respective catches are held latched by another solenoid and a teeter arm. Battery powered models produce brief pulses to put the catches in their locked states or unlocked states using a capacitor to store enough energy after power is lost to kick the solenoids. Utility powered versions can be configured to automatically relax into locked or unlocked states when power is lost. The doors are controlled to unlock when those with authorized access are recognized.

主权项

1. A bi-swing warehouse door latch system, comprising:
an electro-mechanical lock comprising a frame mounted to a rectangular base plate and configured for flush mounting inside a pocket disposed in an horizontal overhead portion of a door casing matching a pair of bi-swing double doors; a pair of catch arms connected by a pivot shaft that passes through the frame and arranged such that a corresponding catch block on each of the distal ends of the catch arms are able to drop under the force of gravity to protrude downward past opposite edges of the base plate and to be actively returned inside the door casing above the base plate; a catch arm solenoid mounted to the frame between the two catch arms and mechanically connected such that an electrical activation will cause the catch blocks to be electro-mechanically lifted up inside the door casing above the base plate; a teeter arm mounted to the frame between the two catch arms and mechanically connected to them such that the two catch blocks can be locked in position after being dropped and protruding down out from the door casing past the base plate; a teeter solenoid mounted to the frame between the two catch arms and mechanically connected to push or pull the teeter arm into or out of a locking position when electrically activated; wherein, each door of the pair of bi-swing double doors is configured to be able to swing open in either direction when the respective catches are unlatched by activating the catch arm solenoid, and are not allowed to swing open when the respective catches are held latched by activating the teeter solenoid.