Winding unit
AssigneeNtn Corporation
InventorsSeiichi Takada, Atsushi Yoshioka
Life of this patent
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Abstract
A winding unit is provided in which one-way clutches for driving and braking are mounted in the inner surface of the reel and a web such as a cover tape 39 is wound by intermittently rotating the reel. Tension acting on the web can be released during replacement of the reel. A spring type torque limiter 18 is disposed between the reel boss 25 and outer rings 12, 12′ of the one-way clutches 9, 11 for driving and braking. The torque limiter 18 is arranged such that, during rotation in the winding direction, a coil spring 27 locks to transmit torque, and when the reel is forcibly turned in the unwinding direction, slip occurs, thus releasing the tension in the web.
Claims12
A winding unit for winding a web, said winding unit comprising a fixed shaft, a rotary sleeve having a lever and rotatably mounted on said fixed shaft, a support reel having a reel boss portion, a reel detachably mounted on said reel boss portion, a one-way clutch for driving and a one-way clutch for braking each having an outer ring formed with a plurality of circumferentially inclined cam surfaces on an inner peripheral surface thereof, rolling elements mounted at positions opposing said cam surfaces, respectively, and springs for biasing said rolling elements in such directions as to be locked by said cam surfaces, said one-way clutches being mounted in said reel boss portion, said one-way clutch for driving being mounted on said fixed shaft through said rotary sleeve, said one-way clutch for braking being mounted on said fixed shaft, said reel being intermittently rotated by pivoting said pivoting lever to wind the web on said reel, a torque limiter being provided between said outer ring and said reel boss portion to shut off transmission to said outer ring of a turning torque in the unwinding direction applied to said reel boss portion.
Dependencies are inferred from the claim text.