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Title:
RAIL JOINT CONNECTING FASTENER
Document Type and Number:
Japanese Patent JP2005207076
Kind Code:
A
Abstract:

To provide a rail joint connecting fastener capable of preventing stress from being concentrated on a specified position of a bolt and preventing the breakage of the bolt.

The rail joint connecting fastener comprises the bolt 14 and a nut 15, and is used for fixing joint plates 13 provided at both sides of a rail 11 in a joint of the rail 11 to the rail 11 by passing the bolt 14 through the rail 11 and through-holes 17a and 17c of both joint plates 13 to fasten with the nut 15. A circular groove 20 having an arc-shaped cross section is recessed in the back of a head 14a of the bolt 14 so as to be continuous from a shaft section 14b. The inner circumferential surface of the nut 15 is formed in a tapered shape so that a diameter can be widened as it goes to the head 14a side of the bolt 14. A cross sectional form of the bottom of a valley forming a male screw 21 of the bolt 14 is formed in an arc-shape larger than a value prescribed in JIS B 0205 or JIS B 0207 as a radius of an arc.


Inventors:
Owaki, Nobusane
Kubono, Toshio
Tanaka, Shigemi
Murayama, Takayuki
Goto, Hiroaki
Sunouchi, Shinjiro
Application Number:
JP2004000013539
Publication Date:
August 04, 2005
Filing Date:
January 21, 2004
Export Citation:
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Assignee:
CENTRAL JAPAN RAILWAY CO
SEKIGAHARA SEISAKUSHO:KK
International Classes:
E01B11/36; (IPC1-7): E01B11/36
Domestic Patent References:
JPS6255715U
JPS50148703U
JP14015501Y
JPH09257021A
JPH01278601A
JPH08334112A
JPS52123366A
Attorney, Agent or Firm:
恩田 博宣
恩田 誠