Institute of Occupational Safety and Health Council of Labor Affairs

Cheng-Yang Hsu

Shih-Hsiung Wu

Chen-Chung Lin

A trench shield includes a pair of shielding panels for protecting opposite side walls of a trench excavation, two side frames are provided for restively adjustably securing the two shielding panels on the two side frames, and have a plurality of brace members spaced between the two side frames for retaining the two side frames and the two shielding panels, and two rolling devices respectively are mounted on a front bottom portion and a rear bottom portion of the trench shield for carrying the trench shield to be ridable and movable on a pipe under construction in the trench excavation. Upon rolling of the rolling devices on the constructing pipe, the trench shield will be conveniently moved on the pipe without any obstruction.

Trench shield directly ridable and movable on a constructing pipe

A trench shield includes: a pair of shielding wheels rotatably mounted on a pair of retaining plates; a plurality of brace members passing through two retaining plates for retaining the two shielding wheels, each shielding wheel formed as a protective circular panel for shielding a side wall of a trench excavation for preventing collapse of the trench walls; and two control devices each provided for locking or unlocking each shielding wheel on each retaining plate; whereby upon unlocking of the wheels from the retaining plates and upon rolling of the wheels in the trench, the trench shield will be forwardly moved conveniently and smoothly.

Growing community of inventors

Taipei Hsien, Taiwan

Cheng-Yang Hsu