Cover structure for covering load plate in trailer for lorry, has anti-intrusion device including control unit to emit alarm such as sound signal, visual, and/or information of intrusion, when cut of light beam is detected

摘要

The structure has a framework delimiting two opposite side faces, where each side face (1C) includes posts (30-34) separated from each other. An anti-intrusion device includes cells (4) to emit and receive light beam, and reflectors (5) to reflect the light beam to the cells. A control unit (6) detects cut of the light beam among the cells and the reflectors, and emits an alarm such as sound signal, visual, and/or information of intrusion, when the cut of the light beam is detected. The cells and the reflectors are mounted on posts close to a same side face of the structure.