Retractable articulated safety barrier for use in fence work to secure access to underground place in road, has panels articulated on portion with normal rotation that is blocked or unblocked in preferred folded or unfolded positions

摘要

The barrier has a central portion (2) articulated on hinges (3) that are fixed on a working surface side, where the barrier serves as a manual assisted hoisting assembly folded in a portfolio underside of a ground closing buffer. The hinges are integrated with two lateral panels (4). The panels are articulated on the central portion with normal rotation that is blocked in preferred folded or unfolded positions by notching support surfaces of pin edge bands (5), and is unblocked for requirements of placements on the panels by a vertical traction.