A collapsible work platform includes toprails engaging fixedly to a platform, backrails engaging the toprails pivotally through a hinge at an end portion of the pair of toprails, frontrails engaging the toprails pivotally through a hinge at the other portion of the toprails, link bars engaging the t
A collapsible work platform includes toprails engaging fixedly to a platform, backrails engaging the toprails pivotally through a hinge at an end portion of the pair of toprails, frontrails engaging the toprails pivotally through a hinge at the other portion of the toprails, link bars engaging the toprails pivotally, a footstep engaging the link bars and the frontrails pivotally, and braces engaging the backrails and the frontrails, and the toprails pivotally through hinges. Each of latching plates having a latching portion engages fixedly the end portions of the backrails and the frontrails maintaining the deployed state by the braces. Each of stopper blocks engage protrudingly an inner side and an outer side of one end and the other end of the toprails, so that the latching portion of the latching plate contacts and engages fixedly and the backrails and the frontrails are not deployed further beyond a certain point.
대표청구항▼
1. A collapsible work platform comprising: a platform (100);a pair of top rails (200) engaging fixedly to each of a front side and a rear side of the platform;a pair of back rails (300), each of which having an upper end engaging one corresponding outer side of the pair of top rails pivotally throug
1. A collapsible work platform comprising: a platform (100);a pair of top rails (200) engaging fixedly to each of a front side and a rear side of the platform;a pair of back rails (300), each of which having an upper end engaging one corresponding outer side of the pair of top rails pivotally through a first hinge (H) at an end portion of the pair of top rails respectively, the pair of back rails engages at the outer sides of the pair of top rails respectively;a pair of front rails (400), each of which having an upper end engaging one corresponding inner side of the pair of top rails pivotally through a second hinge (H) at another end portion of the pair of top rails respectively;a pair of link bars (500), each of which having an upper end engaging the pair of top rails pivotally through a third hinge with a specific interval from the pair of front rails respectively;a footstep (600) having an end portion engaging each of the pair of link bars pivotally through a fourth hinge respectively, and the footstep having another end portion engaging the pair of front rails pivotally;two pairs of braces (700), each of which having an end portion and another end portion, each of a first pair of said two pairs of braces engaging the pair of back rails respectively and the pair of top rails respectively pivotally through a first pair of sixth hinges, each of a second pair of said two pairs of braces engaging the pair of front rails respectively and the pair of top rails respectively pivotally through a second pair of sixth hinges, each of said hinges and braces configured so that the pair of back rails and the pair of front rails engaging with the footstep are configured to be folded so that each of the rails are substantially parallel to one another as the braces are folded, and so that the pair of back rails and the pair of front rails are configured to maintain a deployed state when the braces are unfolded as the back rails and front rails are unfolded with respect to the top rails;each of a pair of latching plates (800) having a latching portion (810) engaging fixedly with the upper ends of the pair of back rails and the upper ends of the pair of front rails respectively, each of the latching plates configured to maintain the deployed state with the two pairs of braces unfolded;two pairs of stopper blocks (900), a first pair of said two pairs of stopper blocks engaging and protruding from the inner side of said another end portion of the top rails respectively, a second pair of said two pairs of stopper blocks engaging and protruding from the outer side of said end portion of the top rails respectively, the stopper blocks configured so that the latching portion of the pair of latching plates contacts and engages fixedly with the pair of back rails and the pair of front rails to maintain the deployed state, and the stoppers blocks are configured to prevent the pair of back rails and the pair of front rails from rotating further beyond a certain position which maintains the deployed state, the deployed state being when the platform and footstep are substantially horizontal and elevated above ground by the front and back rails in order to allow a worker to ascend onto the platform. 2. The collapsible work platform of claim 1, wherein the pair of front rails (400) comprises: a pair of upper front rail portions having said upper end of said pair of front rails respectively engaging said another end portion of the pair of top rails pivotally through the second hinges (H); anda pair of lower front rail portions inserted and deployed in a telescoping manner in the pair of upper front rail portions, wherein a locking button (L) is provided in the footstep installed in the pair of upper front rail portions, configured to generate a locking force to maintain a position of the pair of lower front rail portions inserted into lower portions of the pair of upper front rail portions, or configured to relieve the locking force to deploy the pair of lower front rail portions away from the pair of upper front rail portions,wherein the pair of back rails (300) comprises:a pair of upper back rail portions having said upper end of the pair of back rails respectively engaging the end portion of the pair of top rails pivotally through the first hinge (H); anda pair of lower back rail portions inserted and deployed in a telescoping manner in the pair of upper back rail portions, wherein a cross bar (C) is provided in the pair of upper back rail portions and a second locking button (L) is provided in the cross bar, configured to generate a second locking force to maintain a position of the pair of lower back rail portions inserted into lower portions of the pair of upper back rail portions, or configured to relieve the second locking force to deploy the pair of lower back rail portions away from the pair of upper back rail portions.
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이 특허에 인용된 특허 (17)
Woodward Wilbur W. (Rte. 1 ; Box 54I Colwich KS 67034) Woodward James D. (S. Hwy. D Crane MO 65633), Adjustable work platform.
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