An apparatus, having: a staple (404); and a hasp assembly (200) including: a chamber (412) including a home position (430) and a release passage (414); and a release element (328) disposed in the release passage. Forward rotation of the hasp assembly from an upright orientation (208) about a first horizontal axis (220) allows the kinetic element to move under the influence of gravity from the home position into the release passage and into contact with the release element, thereby releasing the staple.

The invention is a locking device for securing roll-up doors on tractor trailers and other cargo vehicles. The working parts of the invention are enclosed inside a housing and the invention employs a dual catch-pin system which allows the door to be locked shut with minimal play between the bottom of the door and loading deck of the cargo vehicle. This, the invention is resistant to attempts to slide pry bars or jacks under the door in force breach attempts.

The present invention discloses a retainer mechanism that may be associated with a bin or a lid of the bin to maintain lid in a closed (latched) position in relation to the bin.

An apparatus, having: a staple (404); and a hasp assembly (200) including: a chamber (412) including a home position (430) and a release passage (414); and a release element (328) disposed in the release passage. Forward rotation of the hasp assembly from an upright orientation (208) about a first horizontal axis (220) allows the kinetic element to move under the influence of gravity from the home position into the release passage and into contact with the release element, thereby releasing the staple.