WO2010111723A1

WO2010111723A1 - Method and system for continuously producing reinforcing cages

Info

Publication number: WO2010111723A1
Application number: PCT/AT2010/000091
Authority: WO
Inventors: Klaus Ritter; Georg Droschl
Original assignee: Evg Entwicklungs- U. Verwertungs-Gesellschaft M.B.H.
Priority date: 2009-03-31
Filing date: 2010-03-30
Publication date: 2010-10-07
Also published as: AT508093A2; AT508093A3; EP2414115A1; AT508093B1

Abstract

The invention relates to a method for continuously producing reinforcing cages for reinforced concrete, comprising longitudinal elements (L1-L4) and a wire bracket (B), wherein connecting elements (V) are bent. Between the respective bending steps of a connecting element (V), the connecting element (V) is advanced by a selectable increment (P3). An end hook (H) is then bent around the free last longitudinal element (L1), the end piece (E) is bent around the free first longitudinal element (L1), and finally, an end hook (H1) is bent around the longitudinal element (L4) at the end piece around which longitudinal element the end hook (H) is slung. The finished wire bracket (B) is welded to the longitudinal elements (L1-L4).

Description

Method and plant for the continuous production of reinforcement cages

The invention relates to a method and a system for the continuous production of reinforcing baskets for reinforcing reinforced concrete, consisting of a plurality of longitudinal elements and a plurality of connecting the longitudinal elements, with a selectable spacing connecting elements, wherein the connecting elements each form a wire bracket with polygonal cross-sectional area.

From EP 0 097 569 Bl a plant for the production of reinforcing reinforcements for reinforced concrete of this type is known. In this case, a movable forming and welding device is provided for each longitudinal wire, which has a welding electrode and a bending device. In the course of a first step, a transverse element is initially arranged under the lower longitudinal wires. In a second step, the two free ends of the cross member are bent vertically around the lower longitudinal wires and welded with these with the help of the forming and welding device. In a third step, the free legs of the cross member are bent around the two upper longitudinal wires and welded to them. In a fourth concluding step, the free ends of the transverse element are welded together in various possible variations, whereby the reinforcing reinforcement is closed. This system has the disadvantage that any return springing of the transverse element and positioning errors can no longer be compensated by the respective two simultaneous bending operations and the instantaneous welding of the transverse element to the respective two longitudinal wires. Due to the simultaneous bending and welding of the elements load any stresses occurring in the transverse element in the transverse element, the already welded connections so that they can break open. Furthermore, the closure is arranged centrally between two longitudinal wires the reinforcing reinforcement and its straight shape is a disadvantage, since this compound is not very stable and in many cases does not meet the static requirements for the reinforcement cage. Furthermore, the freestanding ends of the cross element pose a risk of injury.

The object of the invention is to avoid the disadvantages of the prior art, and to provide a method and a system of the type described above, which allow the production of reinforcement cages with different cross-sectional shapes in a simple manner and economically, with positioning errors and unwanted stresses in the reinforcement cage be avoided. The object of the invention is also to provide a closure of the wire bracket, which ensures a secure connection, meets the static requirements of the loading basket and the relevant standards, and avoids the risk of injury by freestanding ends.

The method according to the invention is characterized in that the longitudinal elements are initially spatially arranged in the horizontal direction such that they form the corner points of the polygonal cross-sectional area such that a connecting element with its initial piece tangentially contacts the longitudinal elements along a tangentially contacting two longitudinal elements to form the wire bracket Feed line is supplied laterally, wherein optionally a continuous strand of material or cut-to-length connecting elements are used, that successively the Verbindungselernent is bent externally around each longitudinal element, wherein between the respective bending steps, the connecting element is advanced by a selectable step that the bending and feeding operations repeated as long be until the first touched by the connecting element first and a last longitudinal element are not wrapped by the connecting element, that at the free end of the initial piece a final hook with wählba bent bend angle to the free last longitudinal element is that after bending of the end hook, the connecting element is optionally separated from the material strand, wherein both when separating from the material strand as well as cut-to length connecting elements selectable length on the connecting element is formed that for closing the wire hanger then the tail is bent to the free first longitudinal element that finally for finishing the wire hanger on the tail also an end hook with selectable turning angle to the already bent by the end hook longitudinal element is bent, that the finished wire hanger is welded to the longitudinal elements, and that all longitudinal elements are advanced together with the wire bracket by a selectable step in the direction of production horizontally to form a further wire hanger from the connecting element and this with the longitudinal elements to weld.

Preferably, in order to allow bending of the end hook, the free end of the starting piece of the connecting element together with the end hook is pushed away in the direction of the longitudinal elements and pushed back into its starting position after the bending operation.

A system according to the invention for carrying out the method, with feed devices for the longitudinal elements and the connecting elements, with a plurality of bending devices for bending the connecting elements and with welding devices for welding the connecting elements to the longitudinal elements, is characterized in that a plurality of bending devices for bending the connecting elements around the Longitudinal elements and are provided for bending end hooks at the beginning and ending portions of the connecting elements, wherein the bending means are arranged in a bending plane intersecting the longitudinal elements at a selectable angle, that the number of bending means corresponds to the number of longitudinal elements, that the bending means individually in the bending plane can be displaced parallel to the connecting lines of adjacent longitudinal elements, and that at least one welding device displaceable parallel to the bending plane for welding the connecting elements together with Endh aken provided with the longitudinal elements is, wherein the displacements of the welding device take place in parallel to the displacements of the bending means.

Further features and advantages of the invention will be explained in more detail by means of exemplary embodiments with reference to the drawings: FIG. 1 shows a plant according to the invention, FIG. 2 shows the arrangement of the bending means of the plant according to FIG. 1, FIGS. 3a and 3b show the Bending device in various views, Fig. 4 shows the arrangement of the welding devices according to an embodiment of the invention, Fig. 5a and 5b show another embodiment of welding devices in different views, Figs. 6, 8a, 8b, 9, 10a, 10b , IIa, IIb, 12a, 12b, 13a, 13b, 14a, 14b, 15a, 15b, 16a, 16b, 17a, 17b show the process steps for the production of the reinforcing cage, Fig. 7 shows another embodiment of a reinforcing basket with additional longitudinal reinforcing elements at the beginning of the bending process, Figs. 18a and 18b show the welding of the reinforcing cage with welding devices according to that in Figs. 5a and 5b 19a, 19b, 19c and 19d show a further embodiment of a bending device for bending the end hooks, and Fig. 20 shows another embodiment of a reinforcing basket with at least one inner longitudinal element.

In Fig. 1, an embodiment of a plant for the production of reinforcement cages is shown schematically, which consist of several longitudinal elements Ll, L2, L3, L4 and several, connecting the longitudinal elements connecting elements V, wherein the connecting elements V each form a wire bracket with a polygonal cross-sectional area. The longitudinal and connecting elements can have any, but preferably a round, cross-sectional shape. The longitudinal elements L1, L2, L3, L4 are spatially arranged at the beginning of the production in the system in the horizontal direction such that they form the vertices of the polygonal cross-sectional area, this cross-sectional area in the illustrated embodiment a square is. The connecting elements V form the boundary lines of these cross-sectional areas, enclose the longitudinal elements L1, L2, L3, L4 and extend in a straight line between the respective longitudinal elements L1, L2, L3, L4. The number and diameter of the longitudinal elements, as well as their mutual distances are selectable and are determined by the static requirements of the reinforcement cage to be produced. The diameter of the connecting elements and their spacing in the reinforcing cage are also selectable, and depend on the structural designs of the reinforcing cage, since in most applications, the fasteners do not have to take static tasks, but only serve the cohesion of the reinforcing cage. As FIG. 2 shows, within the scope of the invention it is possible to provide additional longitudinal elements L 'for reinforcing the reinforcing cage, which are each provided between the corresponding longitudinal elements L 1; L2; L3, L4 are arranged.

The system has in the inlet region of the system several, at a distance in the longitudinal direction of the longitudinal elements Ll, L2, L3, L4, L 'distributed pads 1 to support the spatially arranged longitudinal elements Ll, L2, L3, L4, L ¹ . The longitudinal elements Ll, L2, L3, L4, L 'are supplied to the beginning of the production of the reinforcing basket by hand or by means not shown facilities in the direction of production Pl a bending and welding device 2 and with their front ends in

Clamping 3 of a trailer 4 firmly clamped. The trailer car 4 is located in the outlet area of the production facility and can be moved in the direction of the double arrow P2 on a support frame 5. The trailer car 4 pulls the clamped by means of the clamping devices 3 longitudinal elements

Ll, L2, L3, L4, L 'intermittently through the bending and welding device 2 and promotes the ready-welded reinforcing cage from the area of the bending and welding device 2. The support frame 5 with pivotable arm, not shown. It also serves to support the reinforcement cage during its manufacture.

Along a feed line X-X, which externally tangentially contacts the two longitudinal elements L1 and L2, a connecting element V of the bending and welding device 2 is fed laterally per working stroke in the direction P3. The connecting elements V are withdrawn by means of a feed device, not shown, from a supply of material, straightened in a straightening device 6 and, as described in Figs. 13a, 13b, separated in a cutting device 7 from the material strand. In the context of the invention, already cut to length connecting elements can be supplied.

The bending and welding device 2 shown schematically in FIGS. 1, 2 has a machine frame 8, a respective front and rear welding device 9 and 10 and four bending devices 11, 12, 13, and 14, which lie in a vertical bending plane ZZ , wherein the feed line XX of the connecting elements V lies in this bending plane ZZ. The second bending device 12 is displaceable by means of an adjusting device 15 in the directions of the double arrow P4 along the feed line X-X. The third and fourth bending means 13 and 14 are arranged on a in the directions of the double arrow P5 in the machine frame 8 vertically displaceable bending beam 16. The displacement movements of the bending beam 16 are effected by means of corresponding adjusting devices 17, which are synchronized by a chain 18. With the aid of an adjusting device 19, the third bending device 13 in the directions of the double arrow P6 in the bending beam 16 is displaceable. With the help of a further adjusting device 20, the fourth bending device 14 in the directions of the double arrow P7 also in the bending beam 16 is displaceable.

The cutting device 7 is displaceable by means of an adjusting device 21 in the directions of the double arrow P8 parallel to the feed line XX of the connecting elements V. The connecting elements V are along the feed line XX initially guided in a guide tube 22 and then by several, arranged between the first and second bending means 11, 12 insertion flaps 23. The insertion flaps 23 are rotatably arranged on a common flap shaft 24 which is rotatable by a drive device 25 such that, after pivoting away the insertion flaps 23, the finished bent wire clip B can be conveyed laterally away. In Fig. 2 also brackets 26 for additional guide elements are schematically indicated, which ensure the guidance of additional longitudinal elements L 'during the production of the reinforcement cage.

In FIGS. 3a and 3b an embodiment of the bending device 14 is shown schematically in different views. The bending devices 11, 12, and 13 are constructed essentially identical. Each bending device 11, 12, 13, 14 essentially has a support plate 27, which connects the bending devices 11, 12 to the machine frame 8 and the bending devices 13, 14 to the bending beam 16 via a bracket 28. The support plate 27 of the third and fourth bending device 13, 14 is displaceable by means of an adjusting device 29 perpendicular to the bending plane ZZ, wherein the various displacement movements P30 to P33 of the bending devices 13, 14 in Figs. 8b to 17b are described in more detail. On each support plate 27, a bending plate 30 is rotatably mounted, which rotates by means of a drive means 31, the bending plate 30 for bending the connecting element V in the corresponding manner in the directions of the double arrow P9 by a selectable angle. Each bending plate 30 carries a central, interchangeable bending mandrel 32 whose diameter is selected according to the respective bending standard. The connecting element V is bent around this bending mandrel 32 by means of an eccentrically arranged bending roller 33 in accordance with the desired shape of the wire bracket, the bending angle being selectable according to the desired cross-sectional area of the reinforcement basket, and taking into account any springbacks. be gesigt. Each bending device 11, 12, 13, 14 has a counter-holder 34 required for bending, which is displaceable by means of an adjusting device 35 in each case in the directions of the double arrow PlO perpendicular to the respective bending plate 30 and according to the directions of the double arrow PIl. The bending device 14 has an additional Verschiebegegenhalter 36 which is displaceable by means of an adjusting device 37 in the directions of the double arrow P12 perpendicular to the bending plate 30 and pivotable according to the directions of the double arrow P13.

As in Pig. 4, the welding devices 9, 10 are arranged on a frame 38, which is fastened to the machine frame 8 at a distance from the feed line XX. The two welding devices 9, 10 are constructed identically and have the same elements, wherein the reference numerals of the identically designed elements of the rear welding device 10 are provided with an apostrophe. Each welding device 9, 10 has a welding head 39 and 40, respectively. The welding of the connecting element V with the longitudinal elements Ll, L2, L3, L4, L 'is described in more detail in Figs. IIa to 16a. In the context of the invention, all suitable welding methods, such as inert gas welding, electrical resistance welding, etc., can be used for welding the connecting element V to the longitudinal elements L1, L2, L3, L4, wherein the welding heads 39, 40 are configured in a known manner are. The welding heads 39, 40 are arranged on a respective pivoting device 41, 41 'and in each case in the directions of the double arrows P14 and P15 pivotally. Each pivoting device 41, 41 'is displaceable parallel to the feed line XX in the directions of the double arrows P16 or P17 with the aid of an adjusting device 42 or 42'. Each welding device 9, 10 has a carriage 43 or 42 ', which carries the respective pivoting device 41, 41' and with the aid of an adjusting device 44 and 44 'respectively the directions of the double arrows P18 or P19 vertically in the frame 38 is movable.

A further exemplary embodiment for a welding device for welding the connecting element V to the longitudinal elements L1, L2, L3, L4 in side view and top view is shown schematically in FIGS. 5a and 5b. This embodiment has for each connection node of the connecting element V with the corresponding longitudinal elements Ll, L2, L3, L4 each have their own welding device 45, 46, 47, 48. The welding devices 45, 46, 47, 48 are arranged on a vertical frame 49, which, viewed in the direction of production Pl, lies at a distance from the bending plane Z-Z in a welding plane S-S which is parallel to the bending plane Z-Z. The frame 49 has a cross member 50, on which the first and the second welding device 45, 46 are arranged. The first welding device 45 essentially consists of a welding head 51, which is pivotable on a pivoting console 52 in the directions of the double arrow P20. The second welding device 46 essentially has a welding head 53, which is arranged pivotably on a pivoting console 54 in the directions of the double-headed arrow P20. The second welding device also has a carriage 55, which can be moved in the directions of the double file P21 on the cross member 50.

The frame 49 has a support bar 56 which is displaceable vertically in the frame 49 in the directions of the double arrow P23 with the aid of a double-acting adjusting device 57. The third welding device 47 essentially has a welding head 58, which is pivotally mounted on a carriage 59 in the directions of the double-headed arrow P24. The carriage 59 is movable by means of an adjusting device 60 in the directions of the double arrow P25 on the support beam 56. The fourth welding device 48 essentially has a welding head 61, which is pivotally mounted on a carriage 62 in the directions of the double-headed arrow P26. The carriage 62 is movable by means of an adjusting device 63 in the directions of the double arrow P27 on the support beam 56.

In the context of the invention, for welding the connecting element V with the longitudinal elements L1, L2, L3, L4, all suitable welding methods, such as e.g. Inert gas welding, electrical resistance welding, etc., are used, wherein the welding heads 51, 53, 57, 60 are configured in a known manner.

Each welding device 45, 46, 47, 48 also has at least one preferential tongs 64 which engage the legs of the wire bow B "and can be moved in the directions P28 parallel to the direction of advance P1 by means of an associated preferred device 65. The preferred tongs 64 have the task, the bent, but not yet welded with the Längsele- ment welded wire bracket B "from the bending plane ZZ in the welding plane SS, where they are fixed for welding by either rigid or movable counter-holder 66. The preferred tongs 64 can be pivoted away in the directions of the double arrow P29 by means of a respective pivoting device 67 in order to clear the way for the further transport of the reinforcing cage for the subsequent welding operation.

The production of the reinforcing cage according to the embodiment described in FIGS. 1 to 4 will be explained in more detail in the following figures. As schematically indicated in FIG. 6, the connecting element V is advanced in the direction of the arrow P3 along the feed line XX through the first and second bending devices 11, 12 until the starting piece A of the connecting element V has the second longitudinal wire L2 in the desired, preselected one Length surmounted. This length corresponds to the distance between the two longitudinal elements L2 and L3 plus the length of any end hook H (FIG. 12a). The bending tools 32, 33 of the bending devices 11, 12 are in their starting position.

In Fig. 7, the same operation as in Fig. 6 is shown, showing the possibility of the reinforcing cage to produce with several additional longitudinal elements L ¹ , wherein the additional longitudinal elements L 'are guided in corresponding guide elements 26 during the production of the reinforcing cage. FIGS. 8a and 8b show the following work step. The third bending device 13 is first moved in the direction of the arrow P30 from the bending plane ZZ in order not to hinder the subsequent bending of the starting piece A of the connecting element V by the second longitudinal element L2 by the second bending device 12. For bending the starting piece A by at least 90 °, the bending plate 30 of the second bending device 12 is rotated in the corresponding arrow direction P9.

As shown schematically in FIG. 9, in a subsequent working step, initially the bending plate 30 of the second bending device 12 is rotated back into its starting position in the corresponding arrow direction P9. Subsequently, the connecting element V in the direction of arrow P3 according to the length of the portion T, which corresponds to the distance of the two Längsele- elements L2 and L3, advanced.

10a and 10b show the further steps for bending the connecting element V. The fourth bending device 14 is first moved in the direction of arrow P31 from the bending plane ZZ to the subsequent bending of the portion T of the connecting element V to the second longitudinal element L2 through the second Bending device 12 does not hinder. For bending the section T by at least 90 °, the bending plate 30 of the second bending device 12 is rotated in the corresponding arrow direction P9. The next steps are shown schematically in Figs. IIa and IIb. First, the third bending device 13 is moved back in the direction of arrow P32 in the bending plane ZZ. Subsequently, the bending plate 30 of the third bending device 13 rotates in the corresponding arrow direction P9 so far that the starting piece A is fixed. From- closing the connecting element V is welded to the second longitudinal element L2 by means of the rear welding head 40.

As shown schematically in FIGS. 12a and 12b, first the fourth bending device 14 is moved back in the direction of arrow P33 into the bending plane Z-Z. Subsequently, the rear welding device 10 is brought in the direction of arrow P34 in the upper welding position, so that the welding head of the rear welding device 10 in this upper position 40 'can weld the connecting element V with the third longitudinal element L3. Finally, the bending plate 30 of the fourth bending device 14 rotates in the corresponding arrow direction P9, in order to bend at the starting piece A an end hook H with a selectable bending angle about the longitudinal element L4. The bending angle of the resulting end hook H is preferably greater than 90 °, so that the end of the end hook H hugs as close to the wire hanger, thereby avoiding injury to the user by the free end of the end hook H.

As shown schematically in FIGS. 13a and 13b, firstly the bending plate 30 of the fourth bending device 14 is rotated back into its starting position in the corresponding arrow direction P9. Subsequently, the bending plate 30 of the fourth bending device 14 is moved in the direction of arrow P31 from the bending plane ZZ to release the end hook H. At the same time, the sliding counter-holder 36 executes an opposite sliding movement in the direction of arrow P35 in order to slightly bend the starting piece A from the bending plane ZZ. Finally, by the cutting movement P36 of the cutting blade of the cutting device 7, the connecting element V is separated from the material strand. This results in an end piece E whose length corresponds to the distance between the two longitudinal elements Ll, L4 plus the length of any end hook H ¹ (FIG. 15a).

As schematically illustrated in FIGS. 14 a and 14 b, the bending plate 30 then guides the first bending device 11 a bending movement in the corresponding arrow direction P9 to bend the tail E about the first longitudinal element Ll.

As shown schematically in FIGS. 15a and 15b, first the fourth bending device 14 is moved back in the direction of arrow P33 in the bending plane ZZ, but the adjusting device 37 of the Verschiebegegenhalters 36 is driven such that it remains in the working position, the initial piece A in leaves its bent away from the bending plane ZZ position. Subsequently, the bending plate 30 of the fourth bending device 14 rotates in the corresponding arrow direction P9 in order to bend an end hook H 'around the longitudinal element L4 on the end piece E. The bending angle of the resulting end hook H ¹ is preferably greater than 90 °, so that the end of the end hook H 'hugs as close to the wire hanger, thereby avoiding injury to the user by the free end of the end hook H'. Finally, with the aid of the welding head 39 of the front welding device 9, the connecting element V is welded to the first longitudinal element L1.

In FIGS. 16a and 16b the last working steps for the completion of the wire bracket B are shown schematically. First, the Verschiebegegenhalter 36 is moved back in the direction of arrow P37 to the bending plane ZZ, whereby the end hook H applies to the end hook H ¹ . At the same time, the bending plate 30 of the fourth bending device 14 is rotated back into its starting position in the corresponding arrow direction P9. The front welding device 9 moves in the direction of arrow P38 into its upper welding position, so that its welding head in this position 39 'can weld the end hooks H, H' to the fourth longitudinal element L4, whereby the wire clip B formed from the connecting element V is completed and connected to all the longitudinal elements L1, L2, L3, L4.

In FIGS. 17a and 17b, the required working step for producing a further wire bracket B is shown schematically. First, drive the front and the rear welding device 9; 10 in the corresponding directions of Double arrows P18 or P19 return to their initial position in the area of the feed line XX. Subsequently, the longitudinal elements Ll, L2, L3, L4 are advanced with the previously produced welded wire bracket B in the production direction Pl. The feed length corresponds to the distance between the wire brackets in the reinforcement cage to be produced. Subsequently, the connecting element V is advanced along the feed line XX in the direction of arrow P3, and the operations described from Fig. 7a start anew. The welding of the connecting element V with the additional longitudinal elements L 'by appropriate positioning and operations of the front and rear welding devices 9, 10, where appropriate, a corresponding adjustment of the welding devices 9, 10 in the horizontal direction parallel to the feed line XX in the invention possible is.

In FIGS. 18a and 18b, the completion of the wire clip formed from the connecting element V is shown schematically for the exemplary embodiment described in FIGS. 5a, 5b. In the bending plane ZZ, a wire bow B "is bent out of the connecting element V, the operations described in FIGS. 6 to 16b being carried out, but without welding the connecting element V to the corresponding longitudinal elements L1, L2, L3, L4. After being released by the bending devices 13, 14, as described in FIGS. 5a, 5b, the finished bent wire hanger B "is pulled from the bending plane ZZ into the welding plane SS in the direction of production Pl in the direction of production Pl, in which the welding devices 45 , 46, 47, 48 are located. The length of the feed step corresponds to the preset, selectable distance between the wire brackets in the reinforcement cage to be produced. In the welding plane SS, the wire bow B "is welded by appropriate positioning and driving of the individual welding devices 45, 46 47, 48 with the longitudinal elements Ll, L2, L3, L4, wherein the welding devices 45, 46, 47, 48 in Frame of the invention work simultaneously or in selectable order sequentially.

In this embodiment, the welding of the finished bent wire hanger B "with the additional longitudinal elements L 'takes place in the context of the invention by means of additional welding devices. However, within the scope of the invention, a positioning is also possible for welding the additional longitudinal elements L' to the wire hanger B" horizontal and / or vertical direction and use of existing welding devices 45, 46, 47, 48 possible.

19a, 19b, 19c and 19d, another embodiment of a bending device 68 for bending the end hooks H and H ^{1 is} shown, which does not require a pushing away of the starting piece A. This embodiment is used when a pushing away of the starting piece A due to lack of elasticity and resilience of the starting piece A, for example, too short a length thereof, or with reduced slidability of the end hook H on the tail E for example, too rough surfaces of Gleitpart- ner H. , E is not possible. The bending device 68 for bending the end hooks H, H 'is substantially similar to the embodiment of the bending roller of the bending device already described 14. The bending device 68 has a in the arrow directions P31, P33 perpendicular to the bending plane ZZ movable Biegetel- ler 30, the in the respective directions P9 'is rotatable. The bending device 68 also has a central, interchangeable bending mandrel 32, and a perpendicular to the bending plane ZZ in the directions of the double arrow P12 displaceable, pivotable in the directions of the double arrow P13 Ververschiebegegenhalter 36 which engages the free end of the starting piece A of the connecting element V. and hold this. The bending device 68, in contrast to the described bending device 14, two eccentrically arranged bending rollers 69, 69 ', which are connected by a connecting plate 70 and in selectable order alternately by Rotation of the bending plate 30 in the corresponding arrow directions P9 'bend the end hooks H and H ¹ .

The arrangement shown in FIG. 19 a corresponds to FIG. 11 a in the region of the longitudinal element L 4 and represents the starting position for bending the end hook H. As shown schematically in FIG. 19 b, the bending plate 30 of the bending device 68 rotates to bend the end hook H in the direction of arrow P9 ', wherein the bend is performed by the bending roller 69. As shown in FIG. 19c, the bending plate 30 is subsequently turned back in the opposite direction of the arrow P9 'to release the bending roller 69, so that the end piece E, as described in FIG. 14a, can be bent. Finally, as shown in FIG. 19d, by turning the bending plate 30 in the same direction P9 ', the second bending roller 69' comes into engagement with the end piece E and bends the end hook H 'by further rotation. Depending on the bending process, the starting piece A is held by the Verschiebegegenhalter 36 in the corresponding movements.

FIG. 20 shows a further exemplary embodiment of a reinforcing basket with at least one inner longitudinal element which can be produced using the method according to the invention and the system according to the invention. This embodiment also shows end hooks with a turn angle less than 90 °. It is understood that the described method and the illustrated embodiments may be variously embodied within the scope of the general inventive concept. Within the scope of the invention, it is possible to produce reinforcing baskets which have other cross-sectional shapes than those described in the exemplary embodiments. The cross-sectional shapes are determined by the number of arranged in the corners of the cross-sectional shape longitudinal elements and their mutual arrangement. The number of corners is selectable, but at least equal to or greater than three, so that, for example, triangular or pentagonal or hexagonal cross-sectional shapes may be used. are lent. A limitation of the number of longitudinal elements and thus the different cross-sectional shapes is given only by any space problems when positioning and working the corresponding bending and welding equipment. The number of bending devices corresponds to the number of corner points of the desired cross-sectional shape of the reinforcing cage to be produced, while the sequence of the working steps corresponds to the exemplary embodiments described. In the production of the wire hanger, the number of feed steps of the connecting elements in most applications is smaller by two than the number of longitudinal elements. According to the idea of the invention, both the bending devices and the welding devices are each displaced and positioned parallel to the connecting lines of adjacent longitudinal elements in order to produce the wire bracket and to weld it to the longitudinal elements. The number of welding devices is advantageously chosen such that the fastest possible production of the reinforcing cage is ensured, ie it may be within the scope of the invention, the number of longitudinal elements and the longitudinal additional elements or smaller. The addition of additional additional longitudinal elements is possible with any cross-sectional shape, as long as there is enough space for the then additionally required welding steps or welding equipment. Furthermore, it is possible within the scope of the invention to supply the longitudinal elements and any additional longitudinal elements of the production plant in the form of cut rods and / or continuously withdraw the longitudinal elements and any additional longitudinal elements of corresponding strands of material and with the help of one or more cutting devices after reaching the selectable length of the reinforcement cage to separate the corresponding longitudinal elements and any additional longitudinal elements of the material strands.

Furthermore, it is possible within the scope of the invention to produce reinforcing baskets which have been formed by the wire hangers. dete, polygonal cross-sectional area forms a selectable angle with the longitudinal elements, which deviates from the right angle of the described embodiments. The bending plane and the welding plane also run parallel to the cross-sectional area in this embodiment. In this embodiment as well, both the bending devices and the welding devices are each moved and positioned parallel to the connecting lines of adjacent longitudinal elements in order to produce the wire bracket and to weld it to the longitudinal elements.

Claims

Claims:

1. A process for the continuous production of reinforcement cages for reinforcement of reinforced concrete, consisting of several longitudinal elements (Ll, L2, L3, L4, ... Ln) and of several, the longitudinal elements (Ll, L2, L3, L4, ... Ln ), the connecting elements (V) in each case form a wire bracket (B) with a polygonal cross-sectional area, characterized in that the longitudinal elements (Ll, L2, L3, L4, ... Ln) in the horizontal direction are initially arranged spatially such that they form the vertices of the polygonal cross-sectional area that for forming the wire bracket (B) a connecting element (V) with its initial part (A) the longitudinal elements (Ll, L2, L3, L4, ... Ln) is supplied laterally along a two tangential elements (Ll, L2) tangentially touching Vorschublinie (XX), wherein optionally a continuous strand of material or cut-to-length connecting elements can be used in that, one after the other, the connecting element (V) extends around a respective longitudinal element (L1 _/ L2; L3; L4; ... Ln) is bent, wherein between the respective bending steps, the connecting element (V) is advanced by a selectable step that the bending and feeding operations are repeated until the first from the connecting element (V) first touched (Ll) and a Last longitudinal element (L4) are not wrapped by the connecting element (V) that at the free end of the starting piece (A) an end hook (H) is bent with selectable turning angle to the free last longitudinal element (L4) that after bending the end hook (H ), the connecting element (V) is optionally separated from the strand of material, wherein both an end piece (E) of selectable length on the connecting element (V) is formed both when separating from the material strand as well as cut connecting elements (V) that for closing the wire bracket (B) then the End piece (E) is bent around the free first longitudinal element (Ll) that finally to finish the Wire clip (B) on the tail (E) also an end hook (H ') with selectable turning angle is bent around the already hooked by the end hook (H) longitudinal element (L4) that the finished wire bracket (B) with the longitudinal elements (Ll, L2, L3, L4, ... Ln), and that all longitudinal elements (L1, L2, L3, L4, ... Ln) are advanced horizontally together with the wire bracket (B) by a selectable step in the direction of production (P1), to form a further wire bow (B) from the connecting element (V) and to weld this with the longitudinal elements (Ll, L2, L3, L4, ... Ln).

2. The method according to claim 1, characterized in that for allowing the bending of the end hook (H ¹ ), the free end of the starting piece (A) of the connecting element (V) together with end hook (H) in the direction of the longitudinal elements (Ll, L2, L3, L4, ... Ln) is pushed away (P35) and pushed back into its original position after the bending process (P37).

3. The method according to any one of claims 1 or 2, characterized in that the bending operations in a bending plane (ZZ) are performed, which contains the feed line (XX) and the longitudinal elements (Ll, L2, L3, L4, ... Ln ) at a selectable angle, preferably 90 °.

4. The method according to any one of claims 1 to 3, characterized in that between the individual for the production of the wire bracket (B) including end hooks (H, H ¹ ) necessary bending operations (P9), the connecting element (V) before bending with the each adjacent, already by the connecting element (V) looped longitudinal element (L2, L3, L4; Ll) is welded, and that finally after completion of all bends the end hooks (H, H ¹ ) are welded to the corresponding longitudinal element (L4).

5. The method according to any one of claims 1 to 3, characterized in that in the bending plane (ZZ) from the connecting element (V) first a wire hanger (B ") including end hooks (H, H ¹ ) to the longitudinal elements (Ll, L2, L3, L4, ... Ln) is bent, and that the bent wire bow (B ") along the longitudinal Ll, L2, L3, L4, ... Ln) in the production direction (Pl) in a plane parallel to the bending plane (ZZ) welding plane (SS) is preferred, where the wire bracket (B ") with the longitudinal elements (Ll, L2, L3, L4, ... Ln) is welded.

6. The method according to any one of claims 1 to 5, characterized in that the turning angle of the end hooks (H, H ¹ ) is selected to be greater than 90 °.

7. The method according to any one of claims 1 to 6, characterized in that the connecting elements (V) and / or the wire hanger (B ") in the inert gas welding process with the longitudinal elements (Ll, L2, L3, L4) are welded.

8. The method according to any one of claims 1 to 6, characterized in that the connecting elements (V) and / or the wire hanger (B ") in electrical resistance welding method with the longitudinal elements (Ll, L2, L3, L4, ... Ln) welded become.

9. The method according to any one of claims 1 to 8, characterized in that at selectable points of the connecting elements (V) and / or the wire bow (B) additional Längselemen- te (L ¹ ) and arranged with the connecting elements (V) and / or the wire hangers (B) are welded.

10. The method according to any one of claims 1 to 9, characterized in that the longitudinal elements (Ll, L2, L3, L4, ... Ln) and the additional longitudinal elements (L ¹ ) of the production plant in the form of cut rods are supplied.

11. The method according to any one of claims 1 to 9, characterized in that the longitudinal elements (Ll, L2, L3, L4, ... Ln) and the additional longitudinal elements (L ') continuously withdrawn from corresponding strands of material and after reaching the selectable length of Reinforcing basket be separated from the material strands.

12. Plant for carrying out the method according to one of claims 1 to 11, with feed devices for the longitudinal elements and the connecting elements, with a plurality of bending means for bending the connecting elements and with Welding devices for welding the connecting elements to the longitudinal elements, characterized in that a plurality of bending devices (11, 12, 13, 14, 68) for bending the connecting elements (V) about the longitudinal elements (Ll, L2, L3, L4, ... Ln) and for bending end hooks (H; H ') at the start and end pieces (A; E) of the connecting elements (V), the bending means (11,12,13,14; 68) in one of the longitudinal elements (Ll , L2, L3, L4, ... Ln) are arranged at a selectable angle-intersecting bending plane (ZZ) such that the number of flexures (11, 12; 13, 14; 68) of the number of longitudinal elements (L1, L2, L3, L4) corresponds to the fact that the bending devices (11, 12, 13, 14, 68) are displaceable individually in the bending plane (ZZ) parallel to the connecting lines of adjacent longitudinal elements (L1, L2, L3, L4, ... Ln) (P4, P6 , P7; P5), and that at least one welding device (9, 10; 45, 46, 47, 48) displaceable parallel to the bending plane (ZZ) for welding the Connecting elements (V) including end hooks (H, H ¹ ) with the longitudinal elements (Ll, L2, L3, L4, ... Ln, L ') is provided, wherein the displacements (P16, P17; P21, P25, P27; P18, P19, P34, P38; P23) of the welding device (9, 10; 45, 46, 47, 48) take place parallel to the displacements of the bending devices (11, 12, 13, 14, 68).

13. Installation according to claim 12, characterized in that the bending devices (11, 12, 13, 14) each have a rotatable (P9) bending plate (30) which is perpendicular (P30, P31, P32, P33) to the bending plane ( ZZ) is displaceable and has the central, interchangeable bending mandrel (32), the eccentrically arranged bending roller (33) and a perpendicular to the bending plane (ZZ) displaceable (PlO) counter-holder (34).

14. Plant according to claim 12 or 13, characterized in that the bending device (14) for bending the end hooks (H, H ') has a pivotable (P13) Verschiebegegenhalter (36) at the free end of the starting piece (A) of the connecting element (V) attacks and this by means of an adjusting device (37) by a selectable distance from the bend Plane (ZZ) off (P35) and back into the bending plane (ZZ) (P37).

15. Plant according to one of claims 12 to 14, characterized in that the bending device (68) for bending the end hooks (H, H ') a vertically {P31, P33) to the bending plane (ZZ) displaceable bending plate (30), a central , interchangeable mandrel (32), a (P12), pivotable (P13) Verschiebgegenhalter (36) perpendicular to the bending plane (ZZ), which engages the free end of the starting piece (A) of the connecting element (V) and holds them, and has two eccentrically arranged bending rollers (69, 69 ') which are connected by a connecting plate (70), and that the bending plate (30) in a selectable order alternately for bending the end hooks (H, H ¹ ) are rotatable (P9 ¹ ) can be controlled ,

16. Installation according to one of claims 12 to 15, characterized in that the welding means (9, 10) in the bending plane (Z-Z) working, pivotable (P14, P15) welding heads (39, 39 ', 40, 40') have.

17. Installation according to one of claims 12 to 15, characterized in that the welding means (45, 46, 47, 48) for welding the connecting elements (V) together with end hooks (H,

H ¹ ) one swiveling (P20, P22, P24, P26) welding head each

(51, 53, 58, 61) which operates in each case in a plane parallel to the bending plane (ZZ) extending parallel welding plane (SS), wherein the in the bending plane (ZZ) generated wire hanger (B ") for welding to the Longitudinal elements (Ll, L2, L3, L4, ... Ln) by means of preference tongs (64) acting on the wire bow (B ") in the production direction (Pl) along the longitudinal elements (L1, L2, L3, L4, ... Ln) the welding plane (SS) is transportable.

18. Installation according to one of claims 12 to 17, characterized in that the number of welding devices (9, 10, 45, 46, 47, 48) of the number of longitudinal elements (Ll, L2, L3, L4, ... Ln, L ') corresponds.

19. Plant according to one of claims 12 to 18, characterized in that for the advancing (Pl) of the longitudinal elements (Ll, L2, L3, L4, ... Ln, L ') and the reinforcing basket (Pl) in the direction of the double arrow (P2) is provided parallel to the direction of production (Pl) movable vans (4) having on the longitudinal elements (Ll, L2, L3, L4, ... Ln, L ') engaging clamping devices (3).

20. Plant according to one of claims 1 to 19, characterized in that for separating the connecting element (V) from the material strand in a horizontal direction (P8) adjustable cutting device (7) is provided.