| 摘要 |
According to one embodiment of the present invention, a railroad signal light structure capable of being lifted or lowered comprises: a first support member fixed and attached on a bottom surface; a first screw member fixed on the bottom surface of the inner side of the first support member and having a thread formed on an outer circumferential surface; a first nut member to be lifted or lowered along the first screw member; a second support member having the same shape as that of the first support member and formed with an inner diameter smaller than that of the first support member to be inserted into the inside of the first support member, so as to be lifted or lowered; a second screw member formed by a cylindrical tube to be inserted into the inside of the first screw member, and having a thread on an outer circumferential surface; a second nut member to be lifted or lowered along the second screw member; a third support member having the same shape as that of the first and the second support member, and formed with an inner diameter smaller than that of the first and the second support member to be inserted into the inside of the second support member, so as to be lifted or lowered; a signal light member fixed and installed in the upper end part of the third support member; and a wire twisted in a spiral shape and supplying power to the signal light member. |
