摘要:
A lining-frame for a gallery or tunnel comprises two planar latticework trussed arches, each comprising an inner belt (3,4) and an outer belt (1,2) interconnected by a zig-zag rod chain (5,6). The arches are fixed parallel to one another by planar connector elements (81a,82a:81b,82b).
摘要:
A reinforcement mat for reinforced concrete consists of longitudinal wires and crosswires which are welded together at their points of cross. End portions of the crosswires project out beyond the edge longitudinal wires and are bent back in the plane of the mat towards the edge longitudinal wires. The longitudinal wires are arranged symmetrically about the longitudinal centerline of the mat partly at wider and partly at narrower pitch. At each edge of the mat a family of at least two longitudinal wires are provided at the narrower pitch.
摘要:
A stacking device for wire grids such as those welded grids used for reinforcing concrete, has vertical guides into which the free ends of a selected longitudinal wire of the grid slide so as to form a stack, one grid on top of another. One of the vertical guides can be pivoted out of its vertical position so as to release the stack onto a transporting device for removal.
摘要:
The invention relates to a method of producing wire mesh having relatively high elongation values and high pliability wherein the wire is not annealed until after having been welded up into the mesh.
摘要:
Plant for the continuous production of building elements which consist of two parallel flat grid meshes made from welded longitudinal and transverse wires, of straight web wires holding the grid meshes at a predetermined mutual spacing and of an insulating body which is arranged between the grid meshes and through which the web wires penetrate, with a production channel (2), on both sides of which supply reels (3, 3') and straightening devices (5, 5'), each for an endless grid sheet (G, G') standing on edge, and push-in devices (7, 7') are provided for drawing off the grid sheets in steps and for introducing these into grid-sheet lead devices (14, 14'), two cutting devices (11, 11') for severing grid meshes (M, M') of predetermined length being arranged upstream of the lead devices, and the grid meshes being capable of being advanced in the lead devices and in the production channel in steps to web-wire feeding and cutting devices (26, 26') by means of a grid-mesh conveying device (18) and downstream welding devices (30, 30') being capable of being advanced for the simultaneous welding of the two ends of all the web wires (S) to corresponding longitudinal wires (L, L') of the grid meshes, furthermore an insulating-body guide device (22) and an insulating-body conveying device (24) being provided for advancing the insulating bodies in steps, synchronously with the grid meshes and a building-element conveying device (32) being provided for conveying the building elements in steps to web-wire trimming devices (35, 35') and for conveying the building elements out of the production channel, and the push-in devices and all the conveying devices, coupled to one another, being capable of being driven jointly by means of drive shafts (38, 38').
摘要:
A system for producing strapped rolls of wire screening having a windup device (3), which has a driven windup mandrel (4) for winding up the wire screening delivered to it, and a guide device for threading the wire screening into the windup mandrel, having a strip-off device (23), with which the wound roll of wire screening is movable in the axial direction relative to the windup mandrel, having a gripper mechanism, which has at least two mutually independent units of gripper arms (19, 20, 21), which are pivotable from above and below toward the outer surface of the roll of wire screening, wherein the gripper mechanism is adjustable in a controlled manner into freely selectable positions, parallel to the windup mandrel axis, by means of a carriage (16) movable on rails (17), and having a surrounding strap application device for the wound roll of wire screening, with a strapping frame (28) that is likewise mounted on a carriage (26) in a manner adjustable at right angles to the windup mandrel axis, and being movable with this carriage parallel to the windup mandrel axis (x--x) on rails (25) in a controlled manner to freely selectable strapping positions, wherein the gripper arms of each gripper arm unit are pivotable in a controlled manner away from the roll of wire screening in order to move past the strapping frame.
摘要:
In a grid welding machine with a horizontal longitudinal wire guide path (4) and transverse wire feeders (27, 28) arranged above and below the latter and transverse rows of active welding electrodes (7, 8), the two rows of electrodes (7, 8) are moved up or down away from the longitudinal wire path (B--B) in synchronization with the welding cycle before transverse wires (Q1, Q2) are placed simultaneously on each side of the longitudinal wire assemblage (L). The transverse wires (Q1, Q2) are then brought into the welding position between the two rows of electrodes (7, 8) and the electrodes are applied to these transverse wires (Q1, Q2). Finally, a row of electrodes (7) are stopped as an abutment against which the welding pressure is applied through the other row of electrodes (8) so that a welding current flows between each electrode pair (7, 8) in series over the point of intersection of each longitudinal wire (L) with two contacting transverse wires (Q1, Q2).
摘要:
A wire or strip bending machine has bending tools (1,2), each of which can act as an active tool or mandrel, mounted on an arm (3) which is slidable in a slot (11) in a rotatable disc (10). The disc is rotatable via gearing (13,14) to rotate one of the tools about the other, to bend material between the tools.
摘要:
A multispot grid-welding machine has an electrode-carrier beam movable up and down and a plurality of guide rods mounting a plurality of electrode units for movement on the beam. Pressure springs bias the electrode units in a direction towards the grid being welded, each electrode unit being movable into a working position and a rest position in which it is retracted. A plurality of return springs act on the electrode units, the return springs being considerably weaker than the pressure springs and acting to shift the respective electrode units on the working position into the retracted position. Devices are provided for advancing selected electrode units into the working position by overcoming the force of the return springs.
摘要:
The invention is concerned with an electrical resistance welding machine for producing a wire lattice by welding together longitudinal and transverse wires at their crossover points. The wires are fed stepwise between at least one pair of electrode devices and means synchronized with the feeding means bring the electrode devices together to clamp the wires at one of the crossover points to allow a welding operation to be effected. At least one of the electrode devices comprises a welding electrode in the form of a circularly cylindrical disc which is fitted to an electrode holder and can be rotated to bring new parts of its peripheral surface into the working position. The axis of the disc is inclined at an acute angle to the axial directions of the longitudinal and transverse lattice wires to provide an improved contact surface between the disc electrode and wires, particularly to avoid any tendency of the transverse wires to be displaced laterally by the contact pressure.