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    • 3. 发明专利
    • Fishplate fastening bolt
    • FISHPLATE FASTENING BOLT
    • JP2006328643A
    • 2006-12-07
    • JP2005149376
    • 2005-05-23
    • Yamato Trackwork System Co Ltd大和軌道製造株式会社
    • IRIE TAKAAKITAKAHATA HISASHI
    • E01B11/38
    • PROBLEM TO BE SOLVED: To provide a fishplate fastening bolt having a bolt head part of such a structure that can secure a necessary fastening force without allowing the bolt head part to nonuniformly come into contact with a fishplate.
      SOLUTION: All the peripheral edge part of the bolt head part 2 in contact with the fishplate is chamfered so as to be symmetrical with respect to a bolt shaft part 3. A chamfered part 4 not in contact with the fishplate is formed on the peripheral edge part of the bolt head part 2 so that the chamfered part 4 not in contact with the fishplate is symmetrical with respect to the bolt head part 3.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种具有这种结构的螺栓头部分的鱼板紧固螺栓,其可以确保必要的紧固力,而不允许螺栓头部分与鱼板不一致地接触。

      解决方案:螺栓头部2与鱼骨接触的所有周边部分被倒角以相对于螺栓轴部分3对称。与鱼板不接触的倒角部分4形成在 螺栓头部2的周缘部分,使得不与鱼板接触的倒角部分4相对于螺栓头部3对称。(C)2007年,JPO和INPIT