PANTAGRAPH WITH COVER

摘要

PROBLEM TO BE SOLVED: To reduce noise generated from a pantagraph during the travel of a vehicle. ;SOLUTION: The joint 5a of the framework 5 of a Z-shaped pantagraph 1 is covered with an outer cover 17 and an inner cover 18. The outer cover 17 is formed so as to cover the joint 5a from the outside of the framework 5. The front edge 28 thereof extends along a straight line which extends vertically at the working height of the pantagraph 1 so that its horizontal cross section may be roughly semicircular. The width of the outer-cover 17 is roughly equal to that of an upper frame 9 or a lower frame 10, the rear edges 29a, 29b highlight a sawtooth formed with reference to a straight or curved differential continuous line as a base line so that an angle formed out of the upper frame 9 and the lower frame 10 may be an obtuse angle, and the rear edge of the outer cover by means of the straight or curved differential continuous line aerodynamically. It is thus possible to prevent generation of mutual interference between the eddies of air currents produced on the upper frame 9, the outer cover 17, and the lower frame 10 respectively while a vehicle is traveling in a drawing direction, thereby reducing aerodynamic noise.;COPYRIGHT: (C)2000,JPO