Machine for producing reinforcements, in particular for reinforced concrete, and the reinforcements produced thereby

A machine for producing a metal reinforcement for in particular reinforced concrete and comprising a plurality of metal longitudinal members and a plurality of metal straps in the form of frames which may be open or closed and are welded to the longitudinal members, said machine comprising a carrier for receiving and carrying a series of the metal straps, means defining open grooves extending longitudinally on the strap carrier for respectively receiving the metal longitudinal members, shifting means withdrawably engageable with the longitudinal members for advancing the longitudinal members step-by-step in a given direction in the grooves, the grooves having a depth which is such that the longitudinal members project sufficiently from the strap carrier to have a frictional contact with the straps which is sufficient to cause the straps to be driven along with the longitudinal members when the longitudinal members are advanced by the shifting means, structure for selecting and releasing only one strap at a time from said series of straps carried by the strap carrier, welding devices arranged around the strap carrier downstream of the strap selecting device relative to said given direction and located in facing relation to zones of intersection between the longitudinal members and the straps released from the series of straps by the selecting and releasing structure, a feeder for feeding to the strap carrier a series of said straps required for a given length of reinforcement, the strap feeder being movable between an operative position longitudinally in alignment with the carrier for feeding the series of straps to the carrier and a withdrawn position and comprising a splined shaft, two pivotal arms mounted to be movable in axial translation on the splined shaft, one of said two arms comprising fixed pins for receiving the number of straps required for producing a reinforcement, the other arm being a thrust arm and provided with strap-removing means for removing the straps from the fixed pins and transferring the straps to the strap carrier when the feeder is in said operative position and the thrust arm is axially displaced on said splined shaft, the imaginary cross-sectional shape defined by the strap-carrying pins being identical to the cross-sectional shape of the strap-carrier so as to permit the passage of the straps from the pins to the strap carrier without transition.

A machine for producing a metal reinforcement for in particular reinforced concrete and comprising a plurality of metal longitudinal members and a plurality of metal straps in the form of frames which may be open or closed and are welded to the longitudinal members, said machine comprising a carrier for receiving and carrying a series of the metal straps, means defining open grooves extending longitudinally on the strap carrier for respectively receiving the metal longitudinal members, shifting means withdrawably engageable with the longitudinal members for advancing the longitudinal members step-by-step in a given direction in the grooves, the grooves having a depth which is such that the longitudinal members project sufficiently from the strap carrier to have a frictional contact with the straps which is sufficient to cause the straps to be driven along with the longitudinal members when the longitudinal members are advanced by the shifting means, structure for selecting and releasing only one strap at a time from said series of straps carried by the strap carrier, welding devices arranged around the strap carrier downstream of the strap selecting device relative to said given direction and located in facing relation to zones of intersection between the longitudinal members and the straps released from the series of straps by the selecting and releasing structure and withdrawable stop means located in a position to stop the strap released by the selecting and releasing structure in a position of alignment with the welding devices for welding it to the longitudinal members.