| 摘要 |
A device 10 for coupling a prefabricated element 28 in concrete, reinforced or not, to a lifting apparatus, comprising: a disposable element 26 destined for partial sinking in an appropriate position into one of the edges of the panel 28, in correspondence with a special notch 30 in which the part 36 of the disposable element 26 which is not sunk in the concrete is contained; a connecting element 12 and a lifting apparatus, a link element 34 between the disposable element 26 and the connecting element 12, provided with a coupling part 32 and a track 20 integrally fixed to the coupling part and shaped essentially in the form of a quarter circle, this track 20, during overturning, lying in a vertical plane passing through the axis 48' of the disposable element 26. An edge radius 48 of the quarter circle of the track 20 is coaxial with the disposable element 26 while the other edge radius 50 is vertical. The two aforesaid radii 48, 50 meet in correspondence with the axis 48' of the disposable element 26 in the point in which the latter comes out of the concrete of the panel 28, or at least in a point 40 very close to this. Finally, the connecting element 12 comprises track- following roller means 18 suitable for moving along the track 20 following lifting of the panel 28 to maintain the pull exerted on the disposable elements 26 substantially vertical. <IMAGE> |
