RAILROAD CARRIAGE WITH DERAILMENT PREVENTION DEVICE

Japanese Patent JP2018039434

A

PROBLEM TO BE SOLVED: To prevent derailment occurring in a railway vehicle on the occurrence of earthquake and thereby contribute to disaster mitigation.SOLUTION: A railroad carriage can smoothly travel along a curving part because the carriage can curve at an inclination by the motion where a flange part of a wheel has an inclination angle, the centrifugal force works in the curving part, and an inclination portion of the flange slightly raises its body on the rail. Superior characteristics are provided that can pass the curving part by a simple structure of the wheel. However, when the large force of the earthquake is applied, the wheel moves to the upper part of the rail along the flange surface having this inclination angle and the derailment occurs easily. Accordingly, the earthquake resistance is greatly improved when a device for equivalently extending a flange angle perpendicularly and a flange length downwardly is mounted to the carriage. In this patent, a disk or a rod is mounted in the backside of the wheel and a disk diameter is made longer than the diameter of the wheel to realize the equivalently perpendicular flange angle and the flange length elongated downwardly, and thereby the derailment is prevented. The mounting of this device is aimed in a space where the flange passes on the rail and its slightly expanded space.SELECTED DRAWING: Figure 2

JP4431061	Derailment prevention device
JP4403062	Fall prevention system for vehicles

INAMIYA KENICHI
ABE HITOSHI
KAAI MASAFUMI

JP2016176102A

March 15, 2018

September 09, 2016

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INAMIYA KENICHI
PRIMENET CO LTD

B61F9/00; B60B17/00; B61F13/00

JP2005104466A	2005-04-21
JP2011026889A	2011-02-10
JPH07132824A	1995-05-23

Tsuyoshi Oshio

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