| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent inclination of an antenna due to snow accretion and the like by improving support rigidity. <P>SOLUTION: A mast fitting 10 is fastened and mounted to a support rod 7 using a mounting bolt 70 rotatably in such a range that an arrangement direction of an antenna element 6a is from a horizontal direction to a vertical direction. In particular, to receive horizontal polarization radio waves, when the antenna element 6a is arranged in the horizontal direction, one side face of the support rod 7 is received in a recess curved inside the mast fitting 10, and a fixing part 55B (55C) integrated with the mast fitting 10 is covered along an upper side face on the other side of the support rod 7. Under this condition, the fixing part is held and fastened to hold the support rod 7 by screwing the mounting bolt 70 and a nut 71, so as to disperse and receive a load due to a snowfall load of snow accumulated on the antenna and a wind pressure load generated by blowing a wind with the mounting bolt and the fixing part. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
