| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a joint use type sign installation device which surely absorbs wind pressure even when the wind pressure by a severe strong wind is applied to a sign board and prevents breakage of the sign board and excessive load on a pole. <P>SOLUTION: The joint use type sign installation device is provided with a tubular supporter 2 fixed in parallel to a utility pole with a joint use tool, an inversion spring 9 housed inside the supporter and one end of which is fixed to the supporter, and a sign board support arm 3 connected to the other end of the inversion spring, and is so constituted that when the sign board supported by the support arm receives wind pressure, the inversion spring to which the wind pressure is applied via the support arm twists and turns the sign board 1, and when the wind pressure received by the sign board becomes weak, the inversion spring returns to its original shape and turns the sign board to the original support position. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
