EP0721385B1 - Plant for the continuous production of structural components - Google Patents

Abstract

PCT No. PCT/AT95/00032 Sec. 371 Date Mar. 14, 1996 Sec. 102(e) Date Mar. 14, 1996 PCT Filed Feb. 13, 1995 PCT Pub. No. WO96/03234 PCT Pub. Date Feb. 8, 1996Plant 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').

Description

The invention relates to a plant for continuous Manufacture of components consisting of two parallel, flat Lattice mats crossing and at the crossing points welded longitudinal and transverse wires from which Keeping mesh mats at a predetermined mutual distance straight web wires as well as from one between the grid mats arranged, penetrated by the web wires insulating body exist, with one production channel, with two to Supply spools arranged on both sides of the production channel and downstream straightening devices for one grid track each, with two in opposite long sides of the production channel tangentially opening, curved guide devices, with an insulating body guiding device arranged between the two guiding devices, with at least one on the side of the production channel arranged group of bridge wire supply spools as well as bridge wire feeding and cutting devices, with Bridge wire welding devices arranged on both sides of the production channel, which is a transformer and flexible electrical Supply lines from the secondary outputs of the transformer Baking welding guns that can be swiveled into the grid mat levels have, and with ridge wire trimming devices for separation one overhang each.

A system of this type is known from AT-PS-372 886. In this system, two lattice lanes are initially in one of the desired thickness of the component to be manufactured corresponding mutual distance in parallel position. In the space between the grid tracks and with An insulating plate is inserted at a distance from each grid track. Wire spools are used to convert several bridge wires into vertical ones Rows over each other from the side through one of the two Grid tracks in the space between the grid tracks and passed through the insulating plate such that each bridge wire with its ends close to a wire of each of the two Grid tracks come to rest. The front ends of the bridge wires with the corresponding wire wires of a wire mesh welded and the bridge wires separated from the wire supply. In a subsequent step, in another Bridge Wire Welding Device The severed ends of the bridge wires with the corresponding grid wires of the other grid track welded.

The welding devices used in the known system consist essentially of a transformer, flexible electrical leads, which the secondary outputs of the Connect the transformer to the electrode holder and electrodes. The electrode holders form the jaws of a welding gun and can be swiveled into the grid mat level. In a subsequent one Work step are from the pivoting trimming shears from the protruding protrusions of the wire ends severed. One jaw of each trimming shear serves as Abutment for a wire mesh of the element's mesh, while the other jaw of each trimmer is a knife which acts on the bridge wire protrusion in each direction shears off the grid wire held by the jaw. Finally components of appropriate length are separated.

The disadvantage of the known system is that only one joint Change the weft angle of the two rows of bridge wire is possible and that in the case of large distances between adjacent rows of bridge wire an additional one in the bullet area of the bridge wires Welding station is required. Another disadvantage is that working with individual independent electrode holders and that each trimming wire overhang requires its own trimming shears with all electrode holders and all trimming scissors must be controlled separately. Another disadvantage lies finally in that the cutters to cut the grid tracks of the already completed component are extremely expensive.

The object of the invention is to initiate a system to provide specified type, which has the disadvantages of the known Avoids plant and also enables it in a continuous Manufacturing process components with different arrangements of the jumper wires and rows of jumper wires in the component and with different types of mesh mats. task the invention is further to create a system that it enables the ends of all in one welding process at the same time Bridge wires in a row with the longitudinal wires at least one Welded mesh mat and several bridge wire protrusions cut off simultaneously in one cutting process.

The system according to the invention is characterized in that One slide-in device on each side of the production channel for the gradual removal of an upright, endless Grid track of at least one supply spool and for insertion the lattice web is arranged in the guide devices, that in front of the guiding devices two cutting devices for separation of grid mats of predetermined length from the endless ones Lattice webs are provided, the lattice mats in the Guiding devices and in the production channel with the help of a mesh conveyor are gradually advancing that one about the insulator guide and Insulating body conveyor device extending production channel for the gradual and synchronous with the grid mats Advancing at least partially more stable, to set the Bridge wires of certain insulating bodies are provided that in the effective range the mesh mat conveyor the feed and Cutting devices for equipping the insulating body with Bridge wires and downstream welding devices for simultaneous welding of both ends of all the bridge wires corresponding longitudinal wires of the grid mats are provided, that the components by means of a component conveyor step-by-step and sequential to the bridge wire trimming devices feedable and from the production channel are conveyable out, and that the insertion devices as well all conveyors through drive shafts with each other coupled can be driven together.

This construction ensures high operational reliability and the continuous production in an economical manner of components of different training, i.e. a very flexible way of working.

According to a preferred embodiment of the invention a feeder device for at least one-lane feeding of cut-off insulating bodies and / or an endless insulating body web in the guide device and in the outlet area of the Guide device a cutting device for separating Insulating bodies of a predetermined length from the insulating body sheet intended.

According to a further feature of the invention, that the grid mat conveyors and the component conveyor at least two pairs of feed elements or conveying elements, the individual elements of all pairs face each other on both sides of the production channel. Each feed element preferably has every conveyor element as well as every grid track insertion device a shaft inclined to the vertical direction with at least two Transport discs provided with several mesh engagement recesses on.

According to the invention, the bridge wire feed and cutting devices to change the weft angle of the bridge wires pivotable.

A development of the invention has the features that for at least each side surface of the component to be manufactured a welding device provided with several welding tongs for simultaneous welding of one end of several in at least one row at a distance from each other arranged straight bridge wires with the horizontal ones Longitudinal wires of a grid mat is provided, the Welding guns as two-armed, interacting in pairs swiveling lower and upper welding gun levers are, whose facing the grid mats in the grid mat planes pivotable ends of welding electrodes for welding at least a bridge wire with a longitudinal wire of the grid mat exhibit.

Fig. 1 eine schematische Draufsicht einer Anlage gemäß der Erfindung;

Fig. 2 eine schematische Seitenansicht einer Gittermatten-Fördervorrichtung; die

Fig. 3a und 3b verschiedene Typen von Transportscheiben;

Fig. 4 einen schematischen Vertikalschnitt einer Stegdraht-Schweißvorrichtung der Anlage gemäß der Erfindung, wobei die in der linken Zeichnungshälfte dargestellte Schweißvorrichtung in ihrer Ausgangslage und die in der rechten Zeichnungshälfte dargestellte Schweißvorrichtung in ihrer Schweißposition gezeigt ist;

Fig. 5 einen schematischen Horizontalschnitt der Stegdraht-Schweißvorrichtung;

Fig. 6 einen schematischen Vertikalschnitt von Besäumvorrichtungen der Anlage, wobei die in der linken Zeichnungshälfte dargestellte Besäumvorrichtung in ihrer Ausgangsstellung und die in der rechten Zeichnungshälfte dargestellte Besäumvorrichtung in ihrer Stellung nach dem Schnitt gezeigt ist;

Fig. 7 einen schematischen Horizontalschnitt der Besäumvorrichtungen und Fig. 8 eine schematische Draufsicht von Teilen eines weiteren Ausführungsbeispiels einer erfindungsgemäßen Anlage.

Further features and advantages of the invention are explained in more detail below using exemplary embodiments with reference to the drawings. Show it:

Figure 1 is a schematic plan view of a plant according to the invention.

Fig. 2 is a schematic side view of a grid mat conveyor; the

3a and 3b different types of transport disks;

4 shows a schematic vertical section of a fillet wire welding device of the system according to the invention, the welding device shown in the left half of the drawing in its initial position and the welding device shown in the right half of the drawing in its welding position;

5 shows a schematic horizontal section of the bridge wire welding device;

6 shows a schematic vertical section of edging devices of the system, the edging device shown in the left half of the drawing in its initial position and the edging device shown in the right half of the drawing being shown in its position after the cut;

7 shows a schematic horizontal section of the trimming devices and FIG. 8 shows a schematic top view of parts of a further exemplary embodiment of a system according to the invention.

The system shown in Fig. 1 is used for producing a component B consisting of two parallel, flat mesh mats M, M 'intersecting and at each other the line and cross wires welded together L, L 'or Q, Q', from the two mesh mats M, M 'in straight line keeping a predetermined mutual distance Bridge wires S, each end with a wire of the two Mesh mats M, M 'are welded, as well as from between the mesh mats M, M 'and at a predetermined distance from them arranged, at least partially dimensionally stable insulating body I, for example an insulating plate made of plastic.

The system has a base frame 1, on which one only schematically indicated, horizontal production channel 2 preferably is arranged in the middle. From two supply spools 3, 3 ' are two upright grid tracks G and G 'accordingly the arrows P1 and P1 ', the mutual Distances of the longitudinal wires L; L 'or the cross wires Q; Q 'everyone Lattice track G; G 'to each other, i.e. the so-called line wire and Cross wire divisions, as well as the width of each grid web G; G' are freely selectable within certain areas.

Via a grid track 4; 4 'arrives at each grid track G; G 'in a straightening device 5; 5 ', each of several, to each other offset straightening rollers 6; 6 ', which is each grid track straighten. Each straightening device 5; 5 'points to their Inlet side a grid web feed device 7; 7 'on, each from a driver roller 8; 8 'and one with the driving roller 8th; 8 'cooperating drive roller 9; 9 ', each drive roller 9; 9 'by swiveling according to the Double arrow P2; P2 'either in or out of engagement with the Driver roller 8; 8 'can be brought. The grid web feeders 7, 7 'have the task of G 'for further processing downstream grating slide-in devices 10, 10 'in the direction of arrows P1; P1 ', or no longer needed after the end of production Lattice web remains against the direction of arrows P1; P1 ' to convey out of the straightening devices 5, 5 '.

Each grid web insertion device 10; 10 'is corresponding the double arrow P3; P3 'between a working position in the one in engagement with the grid web G to be inserted; G' and a rest position in which it is disengaged with the grid web G; G 'is. With the help of the grid track insertion devices 10, 10 ', the structure of which is described later becomes, the lattice webs G, G 'step mat shears 11, 11 'fed, each essentially a cutting bar 12; 12 'and a cutter bar 13; 13 'and of the endless lattice webs lattice mats M, M 'predetermined length split off.

The mat scissors 11, 11 'work in the example shown such that they make a separating cut and thus from the Lattice webs G, G 'continuously successive lattice mats Cut M, M '. However, it is within the scope of the invention also possible to form the mat scissors 11, 11 'and to control that they have a trimming cut on the longitudinal wires perform and in one or two cutting operations from the Cut out grid tracks G, G 'a selectable section, the Length in the feed direction, preferably the cross wire division or an integer multiple of the cross wire division.

Through slightly curved, directed mesh mats M M 'only elastically deforming and tangential in opposite Long sides of the production channel with 2 guiding devices 14, 14 ', for example consisting of several, one above the other arranged arch strips exist and by means of brackets 15, 15 ' and brackets 16, 16 'are attached to the base frame 1 the mesh mats M, M 'are guided into the production channel 2 in this way, that they get parallel to each other there, with a mutual distance which is the desired thickness corresponds to the component B to be manufactured. In the production channel 2, the two mesh mats M, M 'using only schematically indicated spacer elements 17, 17 ', the for example from spacer plates and several, in vertical In the direction of spaced-apart guides, securely guided over its entire width and always exactly in this defined distance.

With the help of a mesh conveyor 18, which in essentially two pairs of opposite to each other Feed elements arranged on both sides of the production channel 2 19, 19 'and 20, 20', the two grid mats M, M 'gradually in the guide devices 14, 14' and in production direction P4 along production channel 2 to downstream processing stations promoted. The first A pair of feed elements 19, 19 'is in the parallel outlet area the guide devices 14, 14 'arranged. The distance of the first pair of feed elements 19, 19 'from the mat shears 11, 11 'and the distance between the two pairs of feed elements 19, 19' and 20, 20 'of each other must be less than the smallest length the grid mats intended for the production of component B. M, M 'in order to ensure that the mesh mats M, M' are conveyed safely to ensure by the grid mat conveyor 18.

From a feeder device 21 they are preferred plate-shaped individual insulating body I corresponding to the Direction of arrow P5 fed to a guide device 22 which forms the inlet side of the production channel 2 and by means of a Mounting plate 23 is attached to the base frame 1. The Guide device 22 is designed such that the insulating body I both in the vertical direction and in its position relative to the two mesh mats M, M 'and in predetermined Distance from these is safely guided. The length and the width the insulating body I is preferably correct with the length or with the width of the mesh mats M, M '.

In the inlet area of the guide device 22, the Insulating body I of one over the entire length of the production channel 2 extending insulating body conveyor 24 detected and gradually synchronized with the mesh mats M, M ' fed to the downstream processing stations.

Within the scope of the invention, it is possible for the feeder device 21 instead of the individual pre-cut insulators I supply an insulating sheet K and with the help of an im Outlet area of the guide device 22 arranged insulating body cutting device 25 from the web insulating body I predetermined Cut off length.

On both sides of the production channel 2 is the guide devices 14, 14 'each have a bridge wire feed and cutting device 26; 26 'downstream, with the simultaneous of on both sides of the production channel 2 several wires D, D ' step by step from wire supply coils 27, 27 'corresponding to the Direction of arrow P6, P6 'subtracted using a dressage device 28, 28 'directed straight, in the horizontal direction in introduced the space between the two mesh mats M, M ', pushed through the insulating body I and from Wire supply are separated.

Within the scope of the invention, it is possible to have all the bridge wire feed and cutting devices 26, 26 'on one side of the production channel 2 to be arranged one behind the other in the direction of production.

The insulating body I is made up of several rows R1 and R2 several each, in the vertical direction at a mutual distance straight web wires S arranged one above the other. The Bridge wires S lie with their two ends on the corresponding ones Longitudinal wires L, L 'of the two mesh mats M, M' and protrude slightly to the side beyond the mesh mats M, M ', for secure welding with the corresponding longitudinal wires L, L 'to ensure the lattice mats. In the illustrated In the exemplary embodiment, the web wires S run inside a vertical row R1 or R2 horizontally in the same direction at an angle to the mesh mats M, M '. In neighboring Rows R1, R2 run the bridge wires inclined in opposite directions. in the Within the scope of the invention it is also possible that the sense of direction the bridge wires are the same in all rows. In horizontal Seen in the direction, the bridge wires S run in the form of horizontal ones Lines Z diagonally between opposite longitudinal wires L and L 'of the mesh mats M and M'. The respective angles the bridge wires S to the longitudinal wires L, L 'can be selected, whereby the sense of direction of the bridge wires S within a row Z changes, so that a framework-like, zigzag arrangement the bridge wires S are formed within a row Z. In the insulating body I are therefore several parallel, horizontal lines Z of Bridge wires S arranged one above the other in the vertical direction, i.e. the web wires S form in the insulating body I and therefore also in the component B to be produced with a matrix-like structure horizontal rows Z and vertical rows R1, R2.

The weft angle at which the web wires S in the Gap introduced between the two mesh mats M, M ' be, is by pivoting the bridge wire feed and Cutting devices 26, 26 'according to the double arrows P7, P7 'adjustable. The material and structure of the insulating body I must be such that the insulating body Bridge wires S for the next one, in the direction of production P4 further transport in its position within the Fix the insulator immovably. The number, the shot angle as well as the mutual, vertical distances of the in one Row R1 or R2 arranged one above the other in the vertical direction Bridge wires S and the horizontal distance between the rows of bridge wires is applied according to the static requirements component B selected.

In some applications it may be necessary to use the Insulator I of the component B made of such hard materials produce that it is not without deformation of the bridge wires S the same can be penetrated. It can help for example hard plastics, such as polyurethane, with expanded or foamable polystyrene provided as a light aggregate Lightweight concrete, plasterboard or cement-bound Press plates, the plastic waste, wood chips or wood chips, contain mineral or vegetable, fibrous substances, Find use. It is also within the scope of the invention possible to build up the insulating body I in layers, the outer cover surfaces of the insulating body made of relatively hard, from materials that cannot be penetrated through the bridge wires, e.g. hard plastic or wood panels, wood, jute, reed or Bamboo weave, and the core of the insulating body I made of loose, soft filling material, such as foam, plastic waste, Wood or mineral wool can exist. In these Cases will be any ridge wire feeding and cutting device 26, 26 'a piercing device shown schematically in FIG. 1 29, 29 'upstream. Each piercing device 29, 29 'has a plurality arranged one above the other in the vertical direction Tools that are used to form a channel in the insulating body I serve to hold one bridge wire S each and the are arranged on a common, pivotable stand. The stands of the piercing devices 29, 29 'are also included the associated bridge wire feed and cutting device 26, 26 ' firmly coupled, and together with this towards the insulating body I of the component B to and from this movable and together with this according to the double arrow P7, P7 ' pivotable.

Within the scope of the invention it is possible to use the piercing devices 29, 29 'corresponding to that described in EP-B-398 465 Design device. The feed movement takes place here of the piercing devices 29, 29 'for shaping the receiving channel for the bridge wires regardless of the feed movement the bridge wire feeding and cutting devices 26, 26 '. Only the pivoting movement of each stand of the piercing devices 29, 29 'for changing the weft angle of the bridge wires S takes place synchronously with the swiveling movement of the respective associated one Bridge wire feed and cutting device 26, 26 'according to the Double arrows P7, P7 '.

The tools for shaping the receiving channel for the Bridge wires S can be used as solid piercing or hollow needles or also be designed as a rotating drill, and have a wear-resistant, for example hardened tip. The Piercing or cabbage needles can preferably be preheated in their tips, to facilitate penetration of the insulating body I.

The two mesh mats M, M 'are with the help of the second Pair of feed elements 20, 20 'of the grid mat conveyor 18 step by step and in synchronization with that by means of the insulating body conveyor 24 advanced insulating body I including the bridge wire S downstream bridge wire welding devices 30, 30 'supplied, in which the web wires S each at one End with the help of welding guns 31, 31 'with the longitudinal wires L, L 'of the mesh mats are welded.

The now dimensionally stable component B is gradually from a downstream component conveying device 32, the essentially two pairs of each other to both Side of the production channel 2 opposite conveyor elements 33, 33 'and 34, 34'.

Those protruding laterally beyond the mesh mats M, M ' Protrusions E of the bridge wires S represent the handling of the Component B pose a significant risk of injury stacking the components for transport and must therefore be separated be so that the bridge wires are as flush as possible with the Terminate the longitudinal wires L, L '. With the help of the first pair of conveyor elements 33, 33 ', the component B is connected downstream opposite sides of the production channel 2 arranged offset Trimming devices 35, 35 'fed which the over the corresponding longitudinal wires L, L 'of the lattice mat M, M' protruding web wire ends E with the longitudinal wires L, Cut off l 'flush.

Within the scope of the invention it is possible to produce the finished, trimmed Component B with the help of on both sides of the production channel 2 downstream of the trimming devices 35, 35 ' Cutting devices 36, 36 'in the horizontal direction in at least to share two, preferably equally large components. The Cutters 36, 36 'are designed to be both the cross wires Q, Q 'of the mesh mats M, M' as well Isolate I can cut.

Within the scope of the invention it is also possible to use the Feeder device 21 individual, cut-off insulating body I and / or a plurality of vertically extending, endless insulating body sheets K in several, one above the other in the vertical direction Feed tracks of the guide device 22.

Furthermore, it is possible within the scope of the invention that the one-piece Insulating body I and / or the endless insulating body web K in the insulating body cutting device 25 by means of a additional cutting tool in at least two, in vertical Direction of overlapping sections or partial webs to share, so that only in the cutting devices 36, 36 ' to cut the cross wires Q, Q 'of the mesh mats M, M' are.

According to the invention, it is also possible in the insulating body cutting device 25 when cutting the horizontal Isolierkörper I or Isolierkörperbahn K these not to cut completely, but only from both sides or also only from one side of the insulating body I or the insulating body web K into it so far that one of the two Parts connecting web in the insulating body I remains. In the In this case, cutting devices 36, 36 'are only the Cross wires Q, Q 'of the mesh mats M, M' cut and the final division of the finished component B into two or several component parts only at the construction site by breaking open made of the insulating body web.

To the cross wire protrusions when cutting the component B as small as possible and trimming further to avoid the component parts, it is within the scope of the invention possible, as shown in Fig. 2, the distances of the two central longitudinal wires C, C ', between which the component B is cut, correspondingly smaller than the rest Longitudinal wire division of the mesh mats M, M 'to choose.

The finished, trimmed component B is with the help of second conveyor element pair 34, 34 'of the component conveyor 32 conveyed out of production channel 2 and Devices not shown for removal or for Pass stack of multiple components.

The distance between the second pair of feed elements 20, 20 'of the grid mat conveyor 18 and the first pair of conveyor elements 33, 33 'of the component conveying device 32 and the distance between the pairs of conveying elements 33, 33 'and 34, 34 'must always be less than the smallest length of the to Manufacture of the component B used mesh mats M, M ', to ensure that the mesh mats are conveyed safely between the Mesh conveyor 18 and the component conveyor 32 as well as to ensure this.

For the continuous production of components B it is absolutely necessary, the two grid sheets G, G ', the grid mats M, M 'and the insulating body sheet K or the individual Isolierkörper I the individual processing stations 11, 11 '; 25; 26, 26 '; 29, 29 '; 30, 30 '; 35, 35 '; 36, 36 'safe and feed trouble-free. To ensure this, the Grid track insertion devices 10, 10 ', the pairs of feed elements 19, 19 '; 20, 20 'of the grid mat conveying device 18, the conveyor element pairs 33, 33 '; 34, 34 'of the component conveyor 32 and the insulating body conveyor 24 driven by a central main feed drive 37, all elements 19, 19 '; 20, 20 '; 33, 33 '; 34, 34 'and the Grid track insertion devices 10, 10 'with the help of articulated drive shafts 38, 38 'are interconnected. The feed steps take place in cycles because the introduction of the Bridge wires S, welding the bridge wires S to the wires the mesh mat M, M 'and trimming the web wire end parts each time the grid mats and the insulating body are at a standstill or the component. Here is the length of the Feed steps according to the cross wire division or one integer multiples of the cross wire division can be selected.

By widening production channel 2 and corresponding Lateral adjustment individually or together the feed elements 19, 19 '; 20, 20 ', the conveyor elements 33, 33 '; 34, 34 'and the elements of the processing stations 25; 26, 26 '; 29, 29 '; 30, 30 '; 35, 35 '; 36, 36 'can be components B can be made with different predetermined widths.

The insulating body conveyor device shown schematically in FIG. 2 24 has one of the main feed drive 37 accordingly conveyor chain 39 driven in the direction of arrow P8, which the conveyor track of the insulating body I within the production channel 2 defined. The conveyor chain 39 carries several carrier carriers 40, each provided with a driver 41 are. The drivers 41 are angular, hook-shaped or thorn-like trained to securely connect to the bottom to produce the insulating body I and thus during the feed of the insulating body any slip between this and the Avoid carrier carriers 40.

When feeding the insulating body I in several superimposed The insulating body conveyor has tracks 24 another upper conveyor chain 39 'with corresponding carrier carriers 40 'and drivers 41' on the top of the insulating body I of the uppermost insulating body sheet.

The feed elements shown schematically in Fig. 2 19, 20 of the grid mat conveyor 18 have one for Vertical inclined shaft 42 on a coupling 43 of an angular gear 44 is driven and in a counter bearing 45 is stored. The bevel gear 44 is on the drive shaft 38 driven by the main feed drive 37 (Fig. 1). Each shaft 42 is with several, with mutually adjustable Spaced transport disks 46, which are rotatable for adjustment on the shaft 42 and after Adjustment by means of a clamping element 47 with the shaft 42 be firmly connected.

As shown in FIG. 3a, the transport disks 46 have several lattice engagement recesses regularly distributed over the circumference 48 with selectable depth, so that flattened Teeth 49 arise. The number of mesh recesses 48 is in accordance with the cross wire division of the lattice mats M, M 'chosen such that the cross wires Q, Q' of the grid mats can be safely grasped by the transport disks 46 and the slip-free feed of the mesh is guaranteed. As a result the inclination of the shafts 42 engage the transport disks 46 of each feed element 19, 19 '; 20, 20 'not only on one, but on several cross wires Q, Q 'of the grid mats M, M 'so that the tensile force is distributed over several wires and this does not cause this when the mesh mats are fed be heavily burdened. The inclination of the shafts 42 ensures also a continuous and slip-free onward transport the grid mats M, M 'of successive components B, the successive lattice mats in Can have abutment distances, for example when Trimming the mesh mats or when cutting out sections arise from the grid tracks G, G '.

The conveyor elements 33, 33 '; 34, 34 'of the component conveyor 32 are analogous to the feed elements 19, 19 '; 20, 20 'of the grid mat conveyor 18 is constructed. Only the transport disks 46 have mesh engagement recesses 48 with less depth. The trellis slide-in devices 10, 10 'have essentially the same elements as those in FIG Fig. 2 shown feed elements 19, 20 of the grid mat conveyor 18. The only difference is that 3b, the mesh engagement recesses 48 of the transport disks 50 are significantly lower, so that they have pointed teeth 51. This shape of the teeth 51 it is ensured that the from the side in the not led Lattice path G, G 'interlocking teeth 51 the cross wires Q of Grid tracks G, G 'securely and grids G, G' Advance without slip.

The bridge wire welding devices shown schematically in FIGS. 4 and 5 30, 30 'lie on the outside of the two grid mats M and M 'offset opposite. Each ridge wire welding device 30, 30 'has a frame 52, that essentially consists of a base plate 53, a ceiling plate 54 and a vertical angle plate 55 there. The frame 52 is vertical according to the double arrow P9 Direction, according to the double arrow P10 in the horizontal Direction perpendicular to the mesh mats M, M 'and accordingly the double arrow P11 in the horizontal direction parallel to the Adjustable mesh mats. Here are the bottom plate 53 and the ceiling plate 54 with the aid of an adjusting device 56 in a base plate 57 vertically and horizontally stored. The vertical adjustment according to the double arrow P9 is done, for example, with the help of an adjustment thread, while the horizontal adjustment is perpendicular to the grid mats M, M 'according to the double arrow P10, for example from one Eccentric adjusting device is effected. Each base plate 57 is on a dovetail guide 58, stationary base frame 59 parallel to the lattice mats M, M ' slidably supported according to the double arrow P11.

The base plate 53 has two lower bearing cheeks 60 equipped, in which a lower eccentric shaft 61 rotatably mounted is. The ceiling plate 54 has two upper bearing cheeks 62 in which an upper eccentric shaft 63 is rotatably mounted. The pivoting movement of the lower eccentric shaft 61 takes place with With the help of a drive element, for example a working cylinder, and one firmly connected to the lower eccentric shaft 61 Swivel lever. With the help of a coupling element, for example a coupling rod, between the lower eccentric shaft 61 and the upper eccentric shaft 63 is the pivoting movement the lower eccentric shaft 61 on the upper eccentric shaft 63 transmitted such that the upper eccentric shaft 63 a performs simultaneous but opposite pivoting movement. In the eccentric part 61 'of the lower eccentric shaft 61 and Eccentric part 63 'of the upper eccentric shaft 63 is a front, vertically running welding gun beam 64 and a rear, vertically running welding gun bar 65 each over Plain bearings or pivoted via fixed bearings. The front one Welding gun beam 64 carries several, with mutual Vertically spaced, two-armed lower welding gun levers 66, and the rear welding gun beam 65 carries several vertical, two-armed upper arms Welding gun lever 67, each welding gun lever 66 or 67 in a welding gun bearing 68 according to the double arrow P12 is pivoted and electrically insulated. The number corresponds to the upper and lower welding gun levers 66 and 67, respectively at least the number of bridge wires S within a vertical Bridge wire row R1 or R2. Each welding gun lever 66 or 67 has on its front facing the grid mats M, M ' End a welding electrode 69 and is supported on its other End via a spring element 70 on one inclined Support plate 71, the corresponding support plates 71 on each with the corresponding welding gun beam 64; 65 fixed vertical support beam 72 arranged are. The spring force and spring travel of each spring element 70 are individually adjustable to the required welding pressure to generate and by softening during the welding process the wires S; L, L 'required repositioning of the welding electrodes 69 to enable. With the help of insulating pieces 73 all support plates 71 are electrically insulated from one another. As shown in Fig. 5, each welding gun lever can 66 and 67 two welding electrodes 69 may be arranged so that at the same time two bridge wires S with a line wire L or L ' be welded. The upper and lower welding gun levers 66 and 67 work together in pairs and form the Baking the welding guns 31 and 31 ', respectively, the welding electrodes 69 of each pair of welding guns 31 and 31 'in the welding position lie congruently one above the other. The mutual vertical distance the welding electrodes 69 in the welding position corresponds to the vertical distance between the bridge wires S within of the jumper wire rows R1 and R2. All welding gun levers 66 or 67 are associated with flexible power lines Welding gun bars 64 and 65 are electrically connected.

Each welding gun beam 64 or 65 is flexible over two Current tapes 74 with the two secondary connections 75 one each Welding transformer 76 connected, all electrical Parts are covered with a cover 77 so that they are safe to touch. In the context of the invention, however, it is also possible with less Power requirement only one welding transformer for both To use welding gun bars.

The welding device works in the following way:

By rotating the lower eccentric shaft 61 and due to that occurring simultaneously due to the coupling element opposite rotation of the upper eccentric shaft 63 pivot the front welding gun beam 64 in accordance with the Double arrow P13 and the rear welding gun bar 65 in opposite Direction according to the double arrow P14 their starting position in the welding position and after completion the weld back to the starting position. In the left 4 of the drawing are the welding gun levers 66 and 67 in its starting position and in the right half of the drawing 4 shown in its welding position. In the welding position at least the welding electrodes 69 engage in the grid mat plane, i.e. into the through adjacent line and cross wires formed meshes of meshes M, M 'to both the bridge wire S to be welded and the associated one Line wire L; L 'of the respective grid mat over a large area capture. The welding electrodes are in the starting position 69 outside the grid mat levels in order to advance the Component B not to hinder.

The trimming devices shown schematically in FIGS. 6 and 7 35 and 35 'each have a frame 78, which is essentially consists of two vertical support plates 79 and with two bearing pins 80 is provided. The frame 78 is corresponding the double arrow P15 in the vertical direction, accordingly the double arrow P16 in the horizontal direction perpendicular to the Side faces of component B and according to the double arrow P17 in a horizontal direction parallel to the side surfaces of component B adjustable.

The vertical adjustment of the frame 78 is carried out by means of an adjustment thread in the bearing journal 80. Each bearing journal 80 is eccentric in a one-armed delivery lever 81 stored, which in turn is pivotable in a base plate 82 is stored. By pivoting the feed lever 81, for example with the help of an adjusting spindle horizontal adjustment of the frame 78 perpendicular to the Lattice mats M, M 'of the component B according to the Double arrow P16. Each base plate 82 is on one with one Dovetail guide 83 provided base frame 84 in parallel to the mesh mats M, M 'according to the double arrow P17 slidably mounted.

In the two support plates 79 are a lower eccentric shaft 85 and an upper eccentric shaft 86 rotatably supported, wherein the pivoting movement of the lower eccentric shaft 85 with the help a drive element, for example a working cylinder and one fixedly connected to the lower eccentric shaft 85 Swivel lever. With the help of a lower eccentric shaft 85 with the coupling element connecting the upper eccentric shaft 86, for example a coupling rod, the pivoting movement the lower eccentric shaft 85 on the upper eccentric shaft 86 transmitted such that the upper eccentric shaft 86 a executes simultaneous but opposite pivoting movement.

In the eccentric 85 'of the lower eccentric shaft 85 and Eccentric part 86 'of the upper eccentric shaft 86 are two vertical running, spaced cutting bars 87 each can be swiveled via fixed bearings and slide bearings, and one running between the two cutting bars 87 Cutter bars 88 each have a plain bearing or a fixed bearing pivoted. The cutting bar 87 carry the Component B faces a series of pages together with adjustable mutual distance one above the other Upper knives 89, and the cutter bar 88 carries the Component B facing a series of with adjustable mutual distance superimposed lower knives 90.

The number of the upper knife 89 and the lower knife 90 corresponds at least the number of rows Z to be trimmed Bridge wires. The mutual distance of the upper knife 89 or Lower knife 90 to each other corresponds to the distance between the rows Z of the bridge wires to be trimmed. Due to the coupled swivel movements of the two eccentric shafts 85 and 86 lead the Cutting bar 87 pivots according to the double arrow P18 and the cutter bar 88 an opposite Swivel movement according to the double arrow P19.

6, the edging device 35 'is in the starting position and the trimming device 35 in the working position shown. The edging devices 35, 35 'operate in the following Way: By rotating the lower eccentric shaft 85 and by, due to the coupling element at the same time reverse rotational movement of the upper eccentric shaft 86 pivot the cutting bar 87 according to the double arrow P18 and the cutter bar 88 in the opposite direction according to the double arrow P19 from its starting position in the cutting position and after separating the bridge wire protrusions E back to the starting position.

In the context of the invention it is also possible to use the cutting bar 87 and the cutter bar 88 on two separate ones Eccentric shafts to store and the cutter bar 87 and the Cutter bars 88 each separately with the help of one each To pivot the eccentric shaft working cylinder. The pivoting movement of the cutter bar 88 takes place independently from the pivoting movement of the cutting bar 87 in each case opposite to the pivoting movement of the cutting bar 87.

In the context of the invention, it is also possible to To design the upper knife 89 and the lower knife 90 and the cutter bars 87 with the upper blades 89 and the cutter bars 88 to be controlled with the lower blades 90 such that each Upper knife 89 during the cutting process as an abutment for fixing of the longitudinal wire L, L 'on which the web wire to be trimmed is used S is welded while the associated lower knife 90 as a cutting tool for separating the bridge wire protrusion E acts and the bridge wire protrusion E in the direction of the Upper knife 89 sheared longitudinal wire L, L 'shears out.

The movements of the welding gun bars 64, 65 of the Bridge wire welding devices 30, 30 'and the cutting bar 87 and the cutter bar 88 of the trimming devices 33, 35 ' must be precisely coordinated with one another in order to Longitudinal wires L, L 'of the lattice mats M, M' or the component B when welding the bridge wires S to the longitudinal wires L, L ' and not to deform when trimming the web wires S and on the other hand the welding guns 31, 31 'and the upper and lower knives 89; 90 for welding the bridge wires S to the longitudinal wires L, L 'or to separate the bridge wire protrusions E correctly to position. For this reason, automatic are not shown Measuring and control devices available, which the individual devices of the bridge wire welding devices 30, 30 'and the edging devices 35, 35' and their movements control and control.

To increase the productivity of the system and the continuous Not interrupting the flow of production shows another embodiment of a plant according to the invention, as shown in a partial plan view in Fig. 8, two each Supply spools 91, 91 'and 92, 92' for grid tracks G1, G1 ' or G2, G2 ', with a pair of associated supply spools 91, 91 'or 92, 92' lattice tracks G1, G1 'or G2, G2' according to the arrow directions P20, P20 'or P21, P21' downstream mat shears 11, 11 'are supplied while the other pair of associated supply spools 92, 92 'and 91, 91 'is on standby. Each supply spool 91, 91 'or 92, 92 'are lattice track guides 93, 93' and 94, 94 ', respectively Straighteners 95, 95 'and 96, 96' connected downstream. Each Straightening device 95, 95 'and 96, 96' each have a feed device 97, 97 'or 98, 98', each with one corresponding to Double arrows P22, P22 'or P23, P23' swiveling drive roller 99, 99 'or 100, 100'. The trellis slide-in devices 10, 10 'must have one in this embodiment Have swivel range, the two grid tracks G1, G1 'or G2, G2 'can capture.

It is understood that the described embodiments various within the scope of the general inventive concept can be modified, in particular can two mesh mats M, M 'have a different structure, i.e. different Line wire divisions and / or cross wire divisions as well different diameters of the longitudinal wires and / or cross wires exhibit. The different cross wire divisions must however correspond to integer multiples and can, for example 50, 100, 150 mm. Another limitation is that it must be ensured that the bridge wires S can be positioned so that despite this different wire pitches and wire diameters welded to the longitudinal wires of the two mesh mats M, M ' can be.

In the context of the invention it is possible to replace the grid tracks G, G '; G1, G1'; G2, G2 'already cut mesh M, M 'to feed the insertion devices 10, 10', wherein the mat shears 11, 11 'are in this case out of order.

It is also possible to produce components B in which one and / or both mesh mats M, M 'the insulating body I on one or both parallel to the production direction P4 protrude from the extending side. To achieve this, either the carriers 41 are raised or extended in this way, or the conveyor track of the conveyor chain 39 is raised such that the lower, parallel to the production direction P4 Side surface of the insulating body I is raised accordingly, whereby one and / or both mesh mats on that side den Form the desired supernatant.

The conveyor track on the top of the insulating body I arranged upper conveyor chain 39 'must be lowered accordingly or the drivers 41 'lowered or extended accordingly will.

For the production of components B, in which the insulating body I the two mesh mats M, M 'on one or both, side parallel to the production direction P4 or The conveyor track of the lower conveyor chain protrudes beyond the sides 39 lowered in this way and, if necessary, the conveyor track of the upper one Conveyor chain 39 'raised so that the lower and, if necessary the upper one, running parallel to the production direction P4 Side surface of the insulating body I lowered accordingly or is raised, whereby the insulating body I the two Lattice mats M, M 'on one or both sides with the protrudes the desired supernatants.

The continuous production of components B with The system according to the invention is preferably used in such a way that the grid mats M, M 'of successive components B only by a negligible narrow joint between the Longitudinal wires of successive lattice mats M, M 'from each other are separated and also the corresponding associated insulating body I of successive components B without any noteworthy Gaps follow one another.

Within the scope of the invention, however, components B are produced in which one and / or both mesh mats M, M 'the insulating body I on one or both, vertically protrude to the side running towards the production direction P4. If one or both mesh mats M, M 'on both sides of the insulating body I should protrude, the insulating body I are adjacent Components B from the feeder device 21 supplied to production channel 2 according to selected intervals and advanced there with these mutual distances. When using an endless insulating body sheet K must be removed the insulating body I corresponds to this distance Part of the path K are separated. The two Partition joints between the lattice mats M, M 'successively Components B are either directly opposite or are laterally offset from each other.

For the production of components B, in which the insulating body I the two mesh mats M, M 'on one or both, protrude the sides perpendicular to the production direction P4, the mesh mats with a predetermined distance in Production channel 2 advanced. To make this selectable Distance between the grid mats M, M 'successively Components B is the mat scissors 11, 11 'at Generate the grid mats corresponding to this distance Section cut out of the endless grid tracks G, G '. The size of the distance is limited by ensuring that must be that the gaps between the mesh panels M, M 'of successive components B due to the inclined Shafts 42 of the grid mat conveyor 18 and the Component conveyor 32 can be bridged to a slip-free feed of the mesh mats one after the other To ensure components B.

With large distances between adjacent rows of bridge wire R1 and R2 can also be two or more in the context of the invention Bridge wire welding devices 30 or 30 'per side surface, in Feed direction P4 of the lattice mats M, M 'seen in succession to be ordered. Here, the welding gun levers are 66 or 67 and the welding electrodes 69 designed such that each Pair of welding guns 31, 31 'only a bridge wire S with a corresponding one Line wire L, L 'is welded.

To increase production speed, you can also in the context of the invention on each side surface of the component several edging devices in the horizontal direction be arranged one behind the other.

Claims (31)

1. Plant for the continuous production of building elements (B) which consist of two parallel flat grid meshes (M, M') made from intersecting longitudinal and transverse wires welded to one another at the intersection points, of straight web wires holding the grid meshes (M, M') at a predetermined mutual spacing and of an insulating body (I) which is arranged between the grid meshes and through which the web wires (S) penetrate, with a production channel (2), with two supply reels (3, 3'), arranged on both sides of the production channel (2), and downstream straightening devices (5, 5'), each for a grid sheet (G, G'), with two curved lead devices (14, 14') opening tangentially on opposite longitudinal sides of the production channel (2), with an insulating-body guide device (22) arranged between the two lead devices (14, 14'), with at least one group, arranged laterally of the production channel (2), of web-wire supply reels (27, 27') and web-wire feeding and cutting devices (26, 26'), with web-wire welding devices (30, 30') which are arranged on both sides of the production channel (2) and which have a transformer (76) and flexible electrical leads (74) from the secondary outputs (75) of the transformer (76) to jaws (66, 67) of welding tongs (31, 31') pivotable into the grid-mesh planes, and with web-wire trimming devices (35, 35'), each for severing a projecting length (E) of web wire, characterized in that a push-in device (7, 7') for drawing off in steps an endless grid sheet (G, G'; G1, G1'; G2, G2') standing on edge from at least one supply reel (3, 3'; 91, 91'; 92, 92') and for introducing the grid sheet into the lead devices (14, 14') is arranged on each of the two sides of the production channel (2), in that two cutting devices (11, 11') for severing grid meshes (M, M') of predetermined length from the endless grid sheets (G, G'; G1, G1'; G2, G2') are provided upstream of the lead devices (14, 14'), the grid meshes (M, M') being capable of being advanced in steps in the lead devices (14, 14') and in the production channel (2) by means of a grid-mesh conveying device (18), in that an insulating-body conveying device (24) extending over the insulating-body guide device (22) and the production channel (2) is provided for advancing in steps, synchronously with the grid meshes (M, M'), at least partially dimensionally stable insulating bodies (I) intended for fixing the web wires (S), in that the feeding and cutting devices (36, 36') for equipping the insulating body (I) with web wires (S) and downstream welding devices (30, 30') for the simultaneous welding of the two ends of all the web wires (S) to corresponding longitudinal wires (L, L') of the grid meshes (M, M') are provided in the effective range of the grid-mesh conveying device (18), in that, by means of a building-element conveying device (32), the building elements (B) can in steps and successively be fed to the web-wire trimming devices (35, 35') and be conveyed out of the production channel (2), and in that the push-in devices (7, 7') and all the conveying devices (18, 24, 32), coupled to one another, can be driven jointly by means of drive shafts (38, 38').
2. Plant according to Claim 1, characterized in that the length of the advancing steps of the grid-sheet push-in devices (10, 10'), of the grid-mesh conveying device (18), of the building-element conveying device (32) and of the insulating-body conveying device (24) corresponds to the smallest spacing of the transverse wires (Q, Q') of the grid meshes (M, M') or to an integral multiple of this spacing.
3. Plant according to either of Claims 1 or 2, characterized in that the grid-sheet push-in device (10, 10'), the grid-mesh conveying device (18), the building-element conveying device (32) and the insulating-body conveying device (24) can be driven synchronously by a joint main advancing drive (37).
4. Plant according to Claim 1 or 2, characterized in that a delivery device (21) is provided for the at least single-track feed of insulating bodies (I) cut to length and/or of an endless insulating-body sheet (K) into the guide device (22) and, in the exit region of the guide device (22), a cutting device (25) is provided for severing insulating bodies (I) of predetermined length from the insulating-body sheet (K).
5. Plant according to one of Claims 1 to 4, characterized in that the insulating bodies (I) and/or the grid meshes (M, M') of successive building elements (B) can be advanced with predetermined spacings along the production channel (2), the insulating bodies (I) being capable of being introduced with predetermined spacing into the production channel (2) by means of a delivery device (21) or portions of predetermined length capable of being separated from the insulating-body sheet (K) by means of the cutting device (25) during the severance of the insulating bodies (I), and in that portions of predetermined length can be cut out from the grid sheets (G, G'; G1, G1'; G2, G2') by means of the cutting devices (11, 11') while the grid meshes (M, M') are being severed from the endless grid sheets (G, G'; G1, G1'; G2, G2').
6. Plant according to one of Claims 1 to 5, characterized in that the grid-mesh conveying devices (18) and the building-element conveying device (31) each have at least two pairs of advancing elements (19, 19'; 20, 20') or conveying elements (33, 33'; 34, 34'), the individual elements of all the pairs being located opposite one another on both sides of the production channel (2).
7. Plant according to Claim 6, characterized in that each advancing element (19, 19'; 20, 20'), each conveying element (33, 33'; 34, 34') and each grid-sheet push-in device (10, 10') has a shaft (42) inclined relative to the vertical direction and having at least two transport discs (46, 50) provided with a plurality of grid-engagement recesses (48).
8. Plant according to one of Claims 3 to 7, characterized in that the insulating-body conveying device (24) has at least one conveyor chain (39, 39') which can be driven by the main advancing drive (37) and extends over the entire length of the production channel (2) and which has a plurality of take-up dogs (41, 41').
9. Plant according to Claim 8, characterized in that the conveying track of the conveyor chain (39, 39') or the take-up dogs (41, 41') can be raised and lowered.
10. Plant according to one of Claims 1 to 9, characterized in that the grid-sheet push-in devices (10, 10') are pivotable into the advancing track of the grid sheets (G, G'; G1, G1'; G2, G2').
11. Plant according to one of Claims 1 to 10, characterized in that the straightening devices (5, 5'; 95, 95'; 96, 96') each have a grid-sheet feed device (7, 7'; 97, 97'; 98, 98') with a driving roller (9, 9'; 99, 99'; 100, 100') each driving roller being pivotable into the advancing tracks of the grid sheets (G, G'; G1, G1'; G2, G2').
12. Plant according to one of Claims 1 to 11, characterized in that the web-wire feeding and cutting devices (26, 26') are pivotable in order to vary the shoot-in angles of the web wires (S).
13. Plant according to one of Claims 1 to 12, characterized in that a web-wire feeding and cutting device (26, 26') is arranged on each of the two sides of the production channel (2).
14. Plant according to one of Claims 1 to 13, characterized in that each web-wire feeding and cutting device (26, 26') is preceded by a bradawl device (29, 29') for shaping channels in the insulating body (I) for receiving web wires (S), these bradawl devices (29, 29') being movable in the direction of the insulating body (I) and away from this and being pivotable synchronously with the web-wire feeding and cutting devices (26, 26') in order to vary the shoot-in angles of the web wires (S).
15. Plant according to Claim 14, characterized in that the bradawl devices (29, 29') for forming the receiving channel have a pricking tool with a heatable tip.
16. Plant according to one of Claims 1 to 15, characterized in that, for each side face of the building element (B) to be produced, at least one welding device (30, 30') provided with a plurality of welding tongs (31, 31') is provided for simultaneously welding, in each case, one end of a plurality of straight web wires (S), arranged one above the other at a mutual spacing in at least one row (R1, R2), to the horizontally extending longitudinal wires (L, L') of a grid mesh (M; M'), the welding tongs (31, 31') being designed as two-armed pivotable lower and upper welding-tong levers (66; 67) which cooperate in pairs and of which the ends facing the grid meshes (M, M') and pivotable into the grid-mesh planes have welding electrodes (69) for welding at least one web wire (S) to a longitudinal wire (L; L') of the grid mesh (M; M').
17. Plant according to Claim 16, characterized in that all the lower welding-tong levers (66) are arranged on a pivotable vertical front welding-tong bar (64) and all the upper welding-tong levers (67) on a pivotable vertical rear welding-tong bar (65).
18. Plant according to Claim 17, characterized in that the front welding-tong bar (64) and the rear welding-tong bar (65), driven by a drive element and connected by means of a coupling element, are pivotable simultaneously, but in opposition.
19. Plant according to Claim 17 or 18, characterized in that each welding-tong lever (66, 67) is supported on the associated welding-tong bar (64; 65) by means of a spring element (70) having an adjustable spring force and adjustable spring excursion.
20. Plant according to one of Claims 16 to 19, characterized in that each welding device (30, 30') is adjustable perpendicularly and parallel relative to the side faces of the building element (B).
21. Plant according to one of Claims 1 to 20, characterized in that at least one trimming device (35, 35') for simultaneously severing at least two adjacent projecting lengths (E) of web wire, which has at least one pivotable upper knife (39) and a pivotable lower knife (90) cooperating with the latter, is provided for each side face of the building element (B).
22. Plant according to Claim 21, characterized in that an associated upper knife (89) and an associated lower knife (90) are provided for each horizontal line (Z) of web wires (S) which is provided in the building element (B).
23. Plant according to Claim 21 or 22, characterized in that all the upper knives (89) of a trimming device (35, 35') are arranged on at least one pivotable cutting bar (87) and all the lower knives (90) of a trimming device (35, 35') are arranged on a pivotable knife bar (88).
24. Plant according to one of Claims 21 to 23, characterized in that the cutting bar (87) and the knife bar (88), driven by a drive element and connected by means of a coupling element, are pivotable simultaneously, but in opposition.
25. Plant according to one of Claims 21 to 23, characterized in that all the upper knives (89) of a trimming device (35, 35') are fastened on at least one cutting bar (87) pivotable by means of at least one drive element and all the lower knives (90) of a trimming device (35, 35') are fastened on a knife bar (88) pivotable by means of at least one further drive element, the knife bar (88) executing a pivoting movement opposed to the pivoting movement of the cutting bar or cutting bars (87).
26. Plant according to Claim 25, characterized in that each upper knife (89) forms at the same time an abutment for the associated longitudinal wire (L, L') and is pivotable in its working position by means of the cutting bar or cutting bars (87) in order to fix the associated longitudinal wire (L, L'), and each lower knife (90) can subsequently be actuated by means of the knife bar (88) in order to sever the projecting lengths (E) of web wire.
27. Plant according to one of Claims 21 to 26, characterized in that the cutting bar or cutting bars (87) and the knife bar (88) of each trimming device (35, 35') extends in each case perpendicularly to the longitudinal wires (L, L') to which the web wires (S) are welded.
28. Plant according to one of Claims 21 to 27, characterized in that each trimming device (35, 35') can be adjusted perpendicularly and parallel relative to the side faces of the building element (B).
29. Plant according to one of Claims 1 to 28, characterized in that the trimming devices (35, 35') are followed, at least on one side of the production channel (2), by a cutting device (36, 36') for the horizontal division of the building element (B) into at least two portions preferably of the same size.
30. Plant according to one of Claims 1 to 29, characterized in that the insulating-body cutting device (25) has at least one cutting tool for severing the insulating body (I) and/or the endless insulating-body sheet (K) into at least two portions and/or part sheets arranged one above the other in the vertical direction.
31. Plant according to one of Claims 1 to 30, characterized in that, in order to adjust the width of the building element (B) to be produced, at least the devices (14', 15', 16', 17', 19', 20', 26', 29, 30', 33', 34', 35', 36', 38') arranged on one side of the production channel (2) are displaceable relative to the devices (14, 15, 16, 17, 19, 20, 26, 29, 30, 33, 34, 35, 36, 38) arranged on the other side of the production channel (2).

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