Title:
BOLT UNTIGHTENING DEVICE
Document Type and Number:
Japanese Patent JP2019206858
Kind Code:
A
Abstract:
To surely and easily loosen a bolt of a rail fastening device and apply oil to a tip of a shaft part of the bolt.SOLUTION: At least one side of a carriage 11 is fitted with a catch function socket 13 at a lower end of an untightening rotating shaft 12b2 on a head of a bolt 21 of a rail fastening device 2, and having a bolt untightening part 12 that performs the untightening work of the bolt 21 by rotating the untightening rotating shaft 12b2. The catch function socket 13 has a head fitting recess 13a1 into which the head of the bolt 21 is fitted. The screwing of the bolt 21 and the rail fastening device 2 is released in the head fitting recess 13a1. In a state in which the head of the bolt 21 is fitted in the head fitting recess 13a1, the bolt 21 can be caught and lifted without dropout. A bolt head catch part 13c is provided that can remove the bolt 21 from the head fitting recess 13a1 in a state in which the bolt 21 is screwed to the rail fastening device 2.SELECTED DRAWING: Figure 1
Inventors:
MORITA MITSUGI
SAKAMOTO AKIRA
NAKAZAWA TAKANORI
YAMAZAKI SHIMIZU
SAKAMOTO AKIRA
NAKAZAWA TAKANORI
YAMAZAKI SHIMIZU
Application Number:
JP2018102940A
Publication Date:
December 05, 2019
Filing Date:
May 30, 2018
Export Citation:
Assignee:
DAITETSU KOGYO KK
YAMAZAKI HAGURUMA SEISAKUSHO KK
YAMAZAKI HAGURUMA SEISAKUSHO KK
International Classes:
E01B29/28
Attorney, Agent or Firm:
Shigeo Nakajima