PARKING BRAKE DEVICE FOR RAILWAY-VEHICLE CALIPER BRAKE DEVICE

WIPO Patent Application WO/2014/203970

A1

The purpose of the present invention is to reduce the size of and simplify a parking brake device. This parking brake device is provided to a side of a cylinder (1) of a brake cylinder of a caliper brake device, said side being where a rod (3) protrudes. A second piston (12) is provided inside a second cylinder (11) coaxially coupled to the cylinder, said second piston being provided so as to be capable of coaxial relative displacement with respect to the rod (3). A one-way clutch (14) is provided which engages/disengages as a result of the pressing/release of the pressing of the second piston on a switch (13) disposed facing a cylinder-side side surface of the second piston. A parking-operation auxiliary spring (15) is provided in a cylinder-side space (11c) inside the second cylinder. Moreover, a manual release piston (16) is provided in a space (11b) at a side opposite to the cylinder side. A manual release rod (17) is fixed to a tip of the manual release piston in the second cylinder. Furthermore, a parking release lever (18) is provided which simultaneously presses the second piston in a rod-retraction direction, and the manual release rod in the rod-retraction direction.

JP2006177444	ELECTROMAGNETIC BRAKE DEVICE
JP2892884	INDUSTRIAL APPLICABILITY: Brake caliper and method for manufacturing the same.

KIMURA RYOUICHI (JP)
FUJITA KAZUAKI (JP)

PCT/JP2014/066298

December 24, 2014

June 19, 2014

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NIPPON STEEL & SUMITOMO METAL CORP (JP)

F16D65/18; B61H5/00; F16D55/2255; F16D121/04; F16D127/06; F16D129/02

JP2008261439A	2008-10-30
JPS63125834A	1988-05-30

MIZOGAMI, Tetsuya et al. (JP)
Tetsuya Mizogami (JP)

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