Safety lock for jump scaffolding
AssigneeHarsco Corporation
InventorAnthony J. Gallis
Life of this patent
Estimating the term…
Abstract
A method and apparatus for forming poured concrete walls using crane-lifted type jump scaffolding optionally including associated wallforms, and particularly including a unique automatic safety lock system keyed to the lifting operation to anchor and secure the scaffolding to the previously poured shearwall. This latching system allows for safe and efficient placement of the scaffolding and eliminates the need to have workmen present on unlocked scaffolding, and especially removes the reason for workmen to be tempted to ride the scaffolding while it is being lifted.
Claims14
A self-actuating safety lock mountable on crane-liftable jump scaffolding for securing the latter to a projecting anchor affixed to the side of a poured concrete wall, comprising a support frame for said lock mountable on said jump scaffolding such that said lock is engagable with said anchor to position and support said scaffolding on said wall, engaging means mounted on said frame for interacting with said projecting anchor in a relative hooking support, a safety catch assembly being pivotally mounted on said frame to lockingly catch said projecting anchor in the at-rest position to prevent unhooking of said engaging means from said anchor and being pivotally rotatable to a lifted unlocked position, a lift connector attached to said safety catch assembly at a point offset from the pivot axis of the latter such that an upward lift derived from said crane acting on said connector rotates said assembly to its unlocked position, and fastening means for mounting said lock to said scaffolding.
A self-actuating safety lock mountable on liftable jump scaffolding for securing the latter to a holding device affixed to the side of a poured concrete wall, comprising locking means mountable on said jump scaffolding for engaging said holding device when said locking means combined with said scaffolding is lowered by a lifting device onto said holding device which thereby supports said scaffolding on said holding device and for locking onto said holding device when said combined locking means and scaffolding is unsupported by said lifting device and for unlocking from said holding device when said combined locking means and scaffolding is supported by said lifting device, and fastening means for mounting said locking means onto said scaffolding.
Dependencies are inferred from the claim text.