CLUTCH DEVICE

WIPO Patent Application WO/2013/157471

A1

Provided is a highly safe clutch device with which the locked state can be maintained reliably even when an excessive load is placed on a second member. This clutch device is equipped with: a lock drum (1) on a first member; an output shaft plate (6) on a second member; a lock spring (3) fitted into the lock drum (1); and an adjustment drum (2) arranged inside the lock spring (3). In the free state the lock spring (3) has an outer diameter slightly larger than the inner diameter of the lock drum (1), and on the lock spring there are formed lock spring stepped parts (3c) comprising a lock spring curved part (3d) and a lock spring bottom part (3e). Lock spring pulling-side contact points (3a) and lock spring pushing-side contact points (3b) are formed respectively on the side of the lock spring curved parts (3d) on which the diameter of the lock spring (3) is contracted and the side on which the diameter is expanded. Lock spring operating pieces (8) that press against the lock spring pulling-side contact points (3a) are provided on the adjustment drum (2), and lock spring pressing pieces (7) that press against the lock spring pushing-side contact points (3b) are provided on the output shaft plate (6).

YAMANE TAKESHI (JP)
KOBAYASHI TOKUZO (JP)
TANIGUCHI YASUSHI (JP)
TAMURA KENGO (JP)
IINUMA YUTAKA (JP)

PCT/JP2013/060910

October 24, 2013

April 11, 2013

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BIZEN HATSUJO CO LTD (JP)

F16D13/08; A47C7/50; B60N2/90; F16D49/04; F16D63/00; F16H35/00

JPS59174428U	1984-11-21
JP2000346167A	2000-12-12
JPS63162161U	1988-10-24
JP2007330480A	2007-12-27
JPH02127829U	1990-10-22
JP2001254765A	2001-09-21
JP2002195323A	2002-07-10
JPH0177142U	1989-05-24

MORI, Hisao et al. (JP)
Woods Hisao (JP)

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