| 摘要 |
PURPOSE:To simplify the rolling mechanism of a hatch-cover mounting hinge section, to bring a hatch cover to a freely opening-closing state at 90--100 deg., to eliminate the need for the installation of a conventional hinge made of steel, to decrease the mandays of the mounting of the hatch cover, to attain lightening and to prevent the generation of rust and corrosion and improve a fine view in a scaffolding material being used on a construction field, etc., and having a hatch (an opening) for the traffic of workers and the passage of CONSTITUTION:In a scaffolding material 1 having a hatch 4, a first hinge composing section 13 is installed to the side frame member 11 of a scaffolding body 2, and a second hinge composing section 23 with a recessed groove 28 for fitting is mounted on the side frame member 22 of a hatch cover 20. The first hinge composing section 13 of the side frame member 11 of the scaffolding material body is inserted into the recessed groove 28 of the second hinge composing section 23 of the side frame member 22 of the hatch cover. |
