US Patent 7047774 Side security device for roll-up doors

A security device is provided with a housing, which may be installed on a roll-up door of a cargo container, tractor-trailer, or storage facility. The security device includes a removable locking pin structure having a locking pin structure is manually removable through a housing chamber for a puck lock. The housing includes a tab with an opening for receiving the locking rod of a puck shaped lock and the locking pin structure has a window through which the locking rod extends in a locking condition of the lock. Structures are provided for storing the locking pin structure when the security device is unlocked.