Lock for mobile storage apparatus

DETAILED DESCRIPTION In accordance with the present invention, there is provided an inexpensive, reliable, and versatile locking mechanism for mobile storage apparatus that may be set in the locked mode prior to moving the storage unit along fixed tracks to the desired locked location.
This is accomplished by apparatus that includes a spring loaded lock bar carried by the movable storage unit for selective engagement with a stationary rack attached to a floor track.
The lock bar is actuated by a key operated actuator, such as an electric solenoid.
In the preferred embodiment, the actuator is a flexible push-pull cable that may be mounted at any convenient place on the storage unit.
The cable induces reciprocation of the lock bar for engagement or disengagement with the rack.
The rack teeth and lock bar are designed such that they always permit the storage unit to freely pass over the rack in one direction, but they firmly engage to prevent movement in the opposite direction.
For that purpose, the lock bar is spring loaded into the locked mode.
The spring urges the lock bar into engagement with the rack teeth, but it permits the lock bar to ratchet over the teeth without harm in one direction of storage unit movement.
Further, the spring allows the locked mode to be selected and retained by the key even if the lock bar contacts a rack tooth tip upon locking actuation.
Positive means are utilized to position the lock bar to the unlocked position.
The rack has several teeth, thus providing flexibility in the locked location of the storage unit.
In electrically driven storage units, the locking mechanism includes an optional safety switch for disabling the electric motors.
Other objects and advantages and features of the invention will become apparent from the disclosure.