GRIP FOR MULTIROW FASTENING OF REINFORCING WIRE Russian patent published in 1996 - IPC

FIELD: manufacture of reinforced concrete products which are reinforced with prestressed wire assembled in packs, particular, for reinforced concrete ties. SUBSTANCE: grip for multirow fastening of reinforcing wire includes holder, fixing bolts and a set of slips of bar-plate-type installed into holder one onto another. Upper and lower slips have one working surface facing inside the set, and intermediate slips have two working surfaces in form of oppositely alternating in width waves and depressions. Wires passed between slips are fastened due to their pressing by press with profile of slips working surface with subsequent fixing by clamping with botts. Transmission of prestressing of wires to concrete of manufactured products may by accomplished by unscrewing the fixing bolts in grips or by some other methods. Undue drawing together of wire contact boundaries with bending waves on the edges of adjacent slips in the set during pressing in grip and possibility of cutting the wire in these places by slips are to be excluded. This is attained due to the fact that side surfaces of waves facing each other located at the edges of adjacent slips in the set are made concave. Concavity of each side surface facing inside slips begins from the wave top and ends at its conjugation with depression, and concavity of each side surface facing slip end begins on the wave top and ends on slip end and is kept all over the length at a space relation to opposite surface of adjacent slip in the set. EFFECT: higher reliability of fastening of reinforcing wire due to preclusion of its rupture and sliding through grip in stretching the reinforcing set. 13 dwg