| 摘要 |
PROBLEM TO BE SOLVED: To provide a noise suppression structure of a collector shoe capable of reducing noise generated from the collector shoe with a simple structure. SOLUTION: A noise reduction portion 11 is a portion for reducing noise generated at the time of discharging air from an air discharge port 9a. A blade type cross plate 13 is a flat plate in a cross shape for dividing the air discharge port 9a into four and disposed in a flow passage 9c. Linear members 14, 15 are members which cross with the air discharge port 9a, and disposed in parallel to the edge portion on the downstream side of the blade type cross plate 13 with each other. When air flows through the flow passage 9c toward the downstream side from the upstream side, speed inclination of air injected from the air discharge port 9a is relaxed. As a result, when the collector shoe has a lift force control structure for controlling lift force working on the collector shoe by injecting the air from the air discharge port 9a, for example, noise generated from the air discharge port 9a can be reduced. COPYRIGHT: (C)2006,JPO&NCIPI
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