22-06-2017 дата публикации
Номер: US20170173998A1
Art operating shall rises and fails by abutting against a cam surface of a cam rotatably built into the upper part of a stem. A swivel-preventing plate part is fixed to the lower end of the operating shaft. An engagement member is fixed to a support yoke and regulates the swiveling by engaging with the swivel-preventing plate part. A brake shoe part is fixed to the lower part of the swivel-preventing plate pail and brakes by abutting against a treat surface of a wheel when the operating shaft falls. A link cam causes a link cam to pivot and causes a brake plate to rise and fall by connected to the brake shoe part. A protruding part for braking, by displacement of the brake plate, is capable of engaging with and disengaging from an annular engagement receiving part formed in the inner periphery of the wheel. 16- (canceled)8. The double-lock caster according to claim 7 ,wherein a through hole which communicates with holes provided in side surfaces of the support yoke and laterally extends is provided in the support member, a part of the hole of the through hole is set to a press fitting dimension, and the engagement member is fixed to the support yoke through the support member by press-fitting the fixing shaft.9. The double-lock caster according to claim 7 ,wherein the swivel-preventing plate part is formed into a plate-like shape, and has engagement receiving parts provided on an upper surface and a lower surface thereof, andthe engagement member has a pair of engagement parts which are vertically apart from each other, the receiving part on the upper surface of the swivel-preventing plate part becomes engageable with the upper engagement part by a displacement of the operating shaft, and the receiving part on the lower surface of the swivel-preventing plate part becomes engageable with the lower engagement part by a farther displacement of the operating shaft.10. The double-lock caster according to claim 8 ,wherein the swivel-preventing plate part is formed into a ...
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