Title:
SCREW SPIKE
Document Type and Number:
Japanese Patent JP2007303509
Kind Code:
A
Abstract:
To eliminate the necessity of extracting a screw spike from a sleeper, when replacing and reversing an adjusting top.
This screw spike 21 is constituted by forming a biting-in screw part 33 for biting in the sleeper 22 on the tip side, and forming a connecting part 35 connecting a tool for applying torque on the base end side. A screw part 37 for threadedly engaging a nut 38 is arranged between the biting-in screw part 33 and the connecting part 35. A maximum diameter of the connecting part 35 is set to a diameter or less of a trough part of the screw part 37. When replacing the adjusting top 15, the nut 38 is attached and detached in a state of not removing the screw spike 21 from the sleeper 22.
COPYRIGHT: (C)2008,JPO&INPIT
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Inventors:
GOTO HIROAKI
SUNOUCHI SHINJIRO
TANAKA SHIGEMI
YOKOUCHI NORIHIRO
SUNOUCHI SHINJIRO
TANAKA SHIGEMI
YOKOUCHI NORIHIRO
Application Number:
JP2006130687A
Publication Date:
November 22, 2007
Filing Date:
May 09, 2006
Export Citation:
Assignee:
SEKIGAHARA SEISAKUSHO KK
TOKAI RYOKAKU TETSUDO KK
TOKAI RYOKAKU TETSUDO KK
International Classes:
F16B25/00; E01B9/10; E01B9/12
Domestic Patent References:
| JPH0211958Y2 | 1990-04-04 | |||
| JP2001334343A | 2001-12-04 | |||
| JP2002349535A | 2002-12-04 |
Attorney, Agent or Firm:
Hironobu Onda
Makoto Onda
Makoto Onda