초록 ▼

An attachment assembly provides a secure attachment point for the fall arrest tether lines of safety harnesses of workers on flat roofs, the assembly being movable over the roof as required. The assembly can be used alone, but usually is mounted on a wheeled utility cart as employed by roofers to mo

An attachment assembly provides a secure attachment point for the fall arrest tether lines of safety harnesses of workers on flat roofs, the assembly being movable over the roof as required. The assembly can be used alone, but usually is mounted on a wheeled utility cart as employed by roofers to move materials on the roof, or may be an integral part of such a cart. The assembly has a base frame that is spaced from the roof edge over which the worker may fall. An attachment member for tether lines is mounted on the base frame together with at least two longitudinally spaced surface engaging arm, the arms being located at the frame side nearer to the roof edge. When the assembly is in operative position each arm has its lower end, which usually has teeth, close to the roof surface. A counterweight is mounted on the opposite side of the base frame. Upon a fall from the roof the tether line pulls on the attachment member downward and toward the edge, the pull tilting the base and cart frames to engage the teeth with the roof surface, whereupon the ends become pivots about which the frames can pivot against the counterweight, which ensures only minor tilting and/or dragging of the assembly toward the edge. With e.g. concrete roofs the teeth may be replaced by bolts in the surface against which the arm ends butt for the assembly to pivot.

대표청구항 ▼

[ I claim:] [1.]1. An attachment assembly for use on a horizontal surface, the assembly when mounted on such a surface providing an attachment point above the surface, the attachment assembly comprising:an assembly base frame having a first side which in operation faces toward a surface edge, and a

[ I claim:] [1.]1. An attachment assembly for use on a horizontal surface, the assembly when mounted on such a surface providing an attachment point above the surface, the attachment assembly comprising:an assembly base frame having a first side which in operation faces toward a surface edge, and a second opposite side facing away from that surface edge;at least two surface engaging members mounted on the base frame at or adjacent to the first side and spaced longitudinally from one another along that first side, each surface engaging member having an upper and a lower end and each being attached to the base frame so that when the assembly is in position on a surface the respective lower end is in an operative position contacting or in close proximity to the surface between the first side and the surface edge; andan attachment member carried by the base frame and providing an attachment point between the at least two surface engaging members;a counterweight providing a counterweight moment and mounted on the assembly base frame so as to be disposed at the base frame second side;whereby the application of a tension force to the attachment member in a direction having a component toward the surface edge urges the base frame to tilt toward the first side and thereby positively engage the surface engaging members lower ends with the surface, whereupon the thus engaged lower ends become pivots about which the base frame is urged by the tension force to pivot and thereby urge the counterweight upward away from the surface against its downward acting counterweight moment.