To provide a hanger ear having an effective vibration control function corresponding to high speed operation of an electric railcar, easy adjustment of damping force, and hardly affected by secular change and environmental variation.
The hanger ear 1 is provided with a hanger bar 2 latched onto catenary wire by an upper end part, and an ear 3 grasping trolley wire T at a lower end side of the hanger bar 2. The hanger bar 2 is provided with a support member 4, a conductor plate 6, a spring 7, and a permanent magnet 8. The support member 4 is latched onto the catenary wire M via a hanger 5 in an upper part. The conductor plate 6 is engaged to the support member 4 so as to relatively move in a vertical direction within a predetermined range, and it is coupled to the ear 3 via a connecting rod 9 in a lower part. The spring 7 is inserted between the support member 4 and the conductor plate 6, and it vertically energizes the conductor plate 6 so that the conductor plate 6 is maintained in a predetermined relative vertical position to the support member 4. At least one pair of the permanent magnets 8 is provided facing each other near the conductor plate 6 so as to hold it in between and fixed on the support member 4 so that opposing face sides are mutually opposite magnetic poles. Vibration of the trolley wire T is absorbed by generating an eddy current, and at the same time, a damping resistance in the conductor plate 6 moving so as to intersect a magnetic flux of the permanent magnets 8.
SHIMIZU MASATOSHI
SHIMADA TAKEFUMI
IWAMA YUICHI
IIKUNI MOTOHISA
IIYAMA FUMIYA
SANWA TEKKI CORP
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