DE1552135A1 - Process for the production of grid-shaped reinforcements or the like. for reinforced concrete beams and device to carry out this process - Google Patents

Description

Description of the patent application

of the Societe Anonyme DAVUIi, Villeneuve-la-Garenne (Seine) /

France

concerning

Process for the production of lattice-shaped reinforcement od.dglo for reinforced concrete girders and device for carrying out this

Procedure.

The invention is directed to a method for the production of lattice-shaped reinforcements for reinforced concrete beams as well a device for carrying out the method.

The reinforcements of concrete girders in the form of longitudinal straps connected to one another in a grid-like manner are on known, and there are numerous different types with similar characteristics and accordingly similar properties.

Improvements to this are based in particular on this G-round Type of reinforcement only on the way in which they are made. Starting from the on numerous construction sites still usual manufacture entirely by hand, are various mechanical Processes have been developed to reduce the workload of workers and reduce the workload.

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On the other hand, various methods have become known to make lattice clips or the like. to produce mechanically, the then attached by hand to the longitudinal straps of the reinforcements. However, these procedures also require a considerable amount Level of manual labor, the influence of which on the production costs is considerable.

The object of the invention is to provide a method for the quick and easy production of complete reinforcements on mechanical To create ways in which the manual work in the normal workflow leads to the creation of the material to be processed and loading of the final product is restricted.

Such a method enables increased economy and considerably reduced costs. It opens In addition to other advantages, the industrial production of completely prefabricated reinforcement in all desired dimensions.

The method according to the invention consists in that after alignment of the material forming the straps and grids of the carrier, on the one hand, the longitudinal straps gradually by one the distance corresponding to the fastening distances and, on the other hand, the grids are moved forward by a length which the development of a line corresponds to the two consecutive Corresponds to the fastening points of a belt by passing through the intermediate fastening point on the other wall,

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whereupon the grating and the grids at the attachment points connected to one another and, if necessary, the reinforcement produced in this way is cut to suitable lengths. According to a particular embodiment, the method provides that used to make the Gfurtungen and the grids To arrange material in a ring on rolls or spools and this

. Passing material through a series of mechanical straightening devices to straighten it out. Then the material is gradually fed through a series of mechanical forming devices, wherein the advance of the material used to form the straps is the same for each step, while the advance of the The material used to form the grid in one of the development of a triangular one formed in the lorm devices Bracket or the like. corresponding length takes place and that by an alternating transverse movement and a rotary movement over a quarter turn executing device, the acts on the material and gives it the triangular shape and angled it at the tip of the triangle to a vertical one Plane to that of the bracket. And the width determine the base of the bracket. The material is then fed to a welding device, by means of which the straps are attached are attached to the tips of the triangular brackets, then the reinforcement is fed to a saw as a continuous band, which automatically cuts this tape to any desired length using a system of control switches or stops.

The coiled material used to manufacture ^{1 of} the straps is steel wire or band iron.

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The steel wire can have a round or any other cross-section exhibit.

The band iron can be U-shaped or V-shaped by a rolling device be cold-formed, the rollers being arranged between the straightening device and the device forming the grid.

The welding of the grid with the belts is expediently carried out using electrode tongs.

The device for carrying out the method according to the invention essentially consists of a straightening device, preferably in the form of a straightening stand or drafting system known per se for straightening the steel wires, where appropriate a rolling mill used for cold forming gives the strip a V- or U-shaped profile; continue out on trolley or Pliers arranged on a slide, which are driven by a crank perform a reciprocating longitudinal movement, as a result of which they gradually advance the wires and straps} further from a in a reciprocating transverse movement and a rotary movement actuated piston assembly, which at its end has a fork-shaped Has nose, between the legs of the wire forming the grating grasped and then acted upon by the piston so that it assumes a triangular shape and at the same time experiences a rotation of about 90 °. Finally, the device is provided with as many electrode clamps as the reinforcement has straps, and it includes a cutting device with

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a circular saw with automatic feed and electric Controlled by relays controlled by contacts driven through the continuously formed band of reinforcement are acted upon and are arranged on its trajectory at two points, the first of which is the rotation of the saw and the second causes the saw to advance and the reinforcement to be cut to the desired length.

The piston forming the grid can move back and forth Transverse movement of a crank mechanism, 'of a winch or of a revolving spindle, while it is rotated by 90 ° by a spindle arranged in the guide cylinder helical groove is granted into which a pinger engages.

Further features, details and advantages of the invention emerge from the following description of a preferred embodiment of the invention and with reference to the drawing. Here demonstrate:

Pig. 1 schematically shows the overall arrangement of the device; Pig. Figure 2 is a plan view of the reinforcement grid forming the reinforcement grid Group of porn establishments; Pig. 3 shows a detail relating to the design of the grid in view;

Pig. 4 a grid in cross section and

Pig. Figure 5 is a partial perspective view of the through-machine manufactured reinforcement.

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The device described is used for the production of concrete beams certain reinforcements with two stressed

Round bars serving as base chords, a U-shaped profiled, the band iron forming the pressure-loaded upper chord and a lattice in the form of a lattice to form a row Round steel bars bent by the triangular brackets connecting the straps.

In the illustrated embodiment, the machine therefore three reels 1, 2 and 3 to hold the wound round bars 4, 5 and 6 and a drum 7 for receiving the wound iron band 8. Round bars 4 and 5 are either smooth, profiled or turned and meet the requirements of the prestressed concrete according to the regulations. For example, you can have a diameter of 8, 10 or 12 mm.

The wire 6 intended for the production of the grid is a mild steel of round cross-section and, for example, a diameter of 6 mm.

The band iron 8 consists, for example, of a flat iron from 40 mm wide and 2 mm thick.

It can be seen that the number of straps, their arrangement, their design and their properties according to the load-bearing capacity of each carrier and the desired strength can be changed.

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The wires 4 »5 and 6 first run through a known one Straightening stand or the like ·. The band iron 8 is made easy by this Facility passed through.

This band iron, on the other hand, is a cold deformation · by a Pormwalzenstrasse 10 exposed, which gave him a V- or U-shaped Give profile. Me wires 4, 5 and 6 are only passed through this device.

The device also has a device for the gradual advancement of the wires 4, 5 and 6 as well as the iron band 7 and for the formation of the triangular brackets of the grid from the wire 6. This device is obviously the most important part of the machine and is therefore subject to a special concern ring.

A Ausführunt ^r Sitor: r is in Porin a simple example in strength. 2 shown.

This device initially has a discontinuous one Feeding device for the wires and the band iron. This device consists of the frame 11 on which two splashes 12 and 13 "are attached, between which two in the same horizontal plane located parallel horizontal rails 14 and two in the same vertical plane located parallel horizontal rails 15 are arranged.

On the rails 14 runs a carriage or carriage 16, the two Has pliers 17 and 18, through which the wires 4 and 5 back

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run through. A vertical slide runs on the rails 15 or a carriage 19 which carries a side tong 20 through which the U-shaped profiled iron band 8 runs. The pliers 17, 18 and 20 are described in detail in the '"below Way operated periodically.

The carriage 16 is connected by a crank 21 to an arm 22 which is attached to a horizontal shaft 23, those carried in the frame 11. Storage 24 revolves.

The slide 19 is connected to a joint 26 fastened to the shaft 23 via a crank 25.

On the shaft 23, an arm 27 is arranged, which is connected by a crank 28 to a crankshaft 29, which on a a pulley 31 supporting shaft 30 is provided. the Pulley 31 is connected to another via a belt 32 Disk 33 in connection, which is keyed onto a hollow shaft 34, which via a coupling system 36 known per se with a drive shaft 35 can be coupled. The clutch is controlled by a longitudinal shaft 37 which rotates in bearings 38 which are mounted on the machine frame and which can be operated by a lever 39 at the end of the device.

The output shaft 40 of a reduction gear strikes the coupling 36 41, which is connected to the electric motor 42.

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The shaft 40 penetrates the hollow shaft 34.

On the lame 11 on the side of the carriages 16 and 19 are two flanges 41a and 42a attached, between which two horizontal rails 43 and 44 "are attached, on which in turn a carriage or carriage 45 ″, which has a tong 46 has through which the wire 6 intended to form the reinforcement grid runs through.

This carriage 45 is by the crank 47 with one opposite the shaft 23 wedged joint 48 connected.

On the shaft 30, a roller 29 is keyed, which has a Belt 50 is connected to another pulley 51, which is keyed to the shaft 52 rotating in the bearings 53. On theirs At the end, the shaft 52 carries a bevel pinion 54 which meshes with another bevel gear 55 which is keyed onto the end of a shaft 56 is.

This shaft 56 is in a row on the housing 11 of the device arranged bearings 55 stored. A cam 58 is keyed onto this shaft and controls the piston rod 60 via the lever 59 of the master cylinder 61 of a hydraulic control fed by a container 62 is actuated.

The master cylinder 61 is connected to cylinders via a line 63, their pistons on the jaws of the clamps 17, 18,

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20 and 46 act in the Sohließsinn while opening the jaws by springs

This becomes the puncture of the torso lifting device for the wires 4, 5 and 6 as well as for the band iron 8 understandable.

The hollow shaft 34 is coupled to the motor shaft 40, and the pulley 33 arranged on this takes the pulley 31 and accordingly the shaft 30 through the belt 32 with. The shaft 30 actuates the connecting rod 28 via the crankshaft 29, which at the joint 48 of the shaft 23 engages. This shaft is therefore alternately set in a rotary motion in one sense and the other, on the connecting rods 21, 25 and 47 as well as on the Carriage 16, 19 and 45 transmits a reciprocating movement ·

In parallel, the shaft 30 takes through the pulley 49, the belt 50 and the pulley 51 the shaft 42 with a frequency of the alternating movement of the carriages corresponding Speed with. The shaft 52 acts via the pinion 54 and 55 cooperate with the shaft 56, the cam 58 revolving at the same speed and periodically on the piston of the master cylinder 61 acts to cause the jaws of the tongs 17, 18, 20 and 46 to close. It follows that the Wires 4, 5 and 6 and the profiles 8 are held by the pliers at this moment and taken along by their carriages. you Feed depends on the distance between the axis of the shaft

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23 from the articulation point of the Kuxbeistangen 21, 25 and 47 on the lever 42 land the joints 26 and 48 separates.

It also follows that the wires 4 and 5 and the profile 8 are continuously advanced by the same length during the Wire 8 is carried along by the carriage 45 over a length which corresponds to the development of any of the triangular brackets, for the formation of which he serves.

The squat 58 is attached to the shaft 56 and gives the tongs free after each advance and allows them to come back to re-open the wires and the profile for the purpose of one to take new feed.

The two carriages 64 and 65 can be placed on the rails 43 and 44 slide freely, which together by two push rods 66 and 6? are connected, which in turn are hinged to a disk 68 are, which in turn revolves around the fixed vertical axis 69 in such a way that that the displacement of the two carriages on the rails 43 and 44 always with the same amplitude and in reverse Sense takes place on both sides of an Aohse.

The slide 64 is constantly pushed back by a spring 70, which is arranged on the rail 43 and on the one hand on a adjustable stop 71 fixed on the rail and on the other hand is supported on an arm 72 connected to the carriage. The path of the carriage 64 to the rear is through a different one adjustable stop mounted on rails 45 and 44

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73 limited. Therefore, the maximum displacement of the two carriages, their movement as a result of the disc 68 and the rods depends 66 and 67 is always symmetrical, depend on this movement.

The carriage 64 carries a pair of pliers, which is controlled by an arm 74, which under the action of a fixed to the piston rod of a Cylinder 77 of the hydraulic control connected rail rotates around axis 75.

In the same way, the carriage 65 carries a pair of pliers which is controlled by an arm 78 which, under the action of a The rail element 80, which is fixedly connected to the piston rod of a hydraulic cylinder 81, rotates around the axis 79.

The two cylinders 77 and 81 are connected by lines 82 and 83 to the two main cylinders 84 and 85, their pistons like that of the master cylinder 61 through the rods 86 and 87 the action of the cams 88 and 89, which are keyed onto the shaft 56, and the swinging of the articulated levers 90 and 91 effect.

A crank 92 is arranged on the shaft 56, on which a connecting rod 93 attacks, which by a cardan joint 94 or the like. is connected to a piston 95 which is fixed in a frame on the frame Cylinder 96 slides.

The cylinder or the sleeve 96 is provided with a groove 97 which has two rectilinear parts which are

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shaped part are connected to each other. One attached to the piston 95 Pin 98 penetrates groove 97.

At its end, the piston 95 is provided with a fork-shaped nose, between the soles of which the wire 6 runs through, whereby a triangular bracket of the desired type is formed.

The function of this form device is as follows:

For this it is to be assumed that no clamp has yet been formed and only a certain length of the wire 6 has been fed to the forming device by the carriage 45 in the manner mentioned above.

At this moment the two carriages 64 and 65 are held by the spring 70 in the maximum displacement position made possible by the stop 73. The cams 88 and 89 then cause the jaws of the tongs 74 and 78 to close, and the pins 74a and 78a, which protrude from the jaws, come laterally into contact with the wire 6 opposite the piston 95, as shown in solid lines in FIG 3 is shown. Immediately thereafter, the crank 92 acts on the piston 95, the nose 99 of which grips the wire 6, and this folds, since it is held by the pins 74a and 78a, under the _{impact effect indicated by the arrow f 1} , with the carriages 64 and 65 approach each other.

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When the pin 98 of the piston 95 engages in the helical part of the groove 97, the piston is forced to rotate about its axis, and the nose 99 exerts a torsional force on the wire 6 in the area of the already fully made kink. At the end of the path of movement of the piston 95, the pin 98 reaches the straight end part of the groove, and in the process the tip of the triangle is rotated by about 90 °, as shown in dash-dotted lines. The two carriages 64 and 65 which are carried along their tongs during the forming of the wire 6 by the pins 74 and 78a *, then a maximum of approximately one other ** and the pins take the positions 74'a and 78 ^f a a.

The crank 92 then pulls the piston 95 back and disengages the nose 99 from the bracket formed and guides it out of the area of the second bend 6a of the grid.

The tongs 74 and 78 are then released under the action of the cams 88 and 89 from the master cylinders 85 and 84, while the cam 58 clamps the tongs of the feed carriage for the wire.

At this moment the carriages 64 and 65 are guided into their extreme position under the action of the spring 70.

The carriage 45 moves by what is necessary to form a bracket Length of wire and the pliers 74 and 78 are all over again

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braced, while the pin 78a sioh lays behind the second bend 6'a of the clamp for its formation.

A new work cycle runs in the same way a "b, so that a grid in the form of a continuous band is created

The flexibility of the (fitter enables those who have already been trained Hold back brackets as each new bracket is formed. It is therefore sufficient to choose between that of the shaping serving device 11 and the welding device following it to leave a certain distance.

This device 100 consists of a system of guide elements, the wires 4 and 5 and the profile 8 with the angles of the brackets of (keep jitter in touch. By known Electrode tongs 101, 102, spot welding of the elements is then carried out in a likewise known manner synchronized with the feed device for the material in any way.

The reinforcement in the form of the band labeled B is fed step by step to a circular saw 104 known from sioh, which cuts the tape into predetermined and freely variable lengths.

For this reason, the tape B after passing through the Saw fed to a horizontal table 105 of great length,

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in front of which a frame 106 receiving the cut reinforcements is arranged.

During its gradual advance, the end of the tape reaches a first switch which, via a relay, drives the motor the saw 104 starts or its shaft couples with the drive shaft of a continuously rotating motor. This switch 7 is located at a distance from the saw which is slightly less than the length to which the tape is cut lsi; to ensure normal operation of the saw, the advance of which is effected by means of a second motor driven by a Relay is controlled, which in turn is controlled by one in one of the Cut length corresponding distance from the saw arranged switch 108 is operated.

The cut is made automatically, and the cut reinforcement falls into a receiving device 96, from where it is carried by a loading device or the like. is removed.

It can be seen that the one introduced at one end of the machine Material is automatically converted into reinforcement of the desired length by the device.

A control device 109 enables aes operation to be controlled the device.

If one of the rolls or spools 1, 2, 3 or 7 is empty, it will be replaced, and the free end of the wire or strap to the end

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welded on the previously expired part, so that the work of the device is only briefly interrupted.

Of course, the device, which is only described as an example, can experience changes that necessarily result in deviations the nature of the elements forming the reinforcement chords result. The device enables reinforcement to be produced with a grid made from a wire 6 (see Pig. 4 and 5) as well as with an upper, stressed on pressure Belt in the form of a profile 8 and a lower, tensile belt made of two round bars 4 and 5, their removal corresponds to the distance e! between the two arms of the grid, this distance corresponds to the diameter of the nose 99 of the piston 95 (see FIG. 3). That nose is obvious interchangeable and can be replaced by other noses of different diameters. To increase the distance e is it is possible, if necessary, to use three or more chords that are subjected to tensile stress.

Of course, the invention is not limited to the embodiment described above and shown in the drawing, but there are numerous modifications possible without these deviating from the basic idea of the invention «,

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Claims (1)

Claims ι J Process for the production of reinforcement for pilaster concrete beams in the form of upper and lower longitudinal straps, which are connected to each other at certain points on Duroh lattice-like brackets are connected, characterized in that the material forming the straps and the grid of the brackets is directed and on the one hand, the longitudinal straps in a dimension corresponding to the distance between the fastening points and, on the other hand, the grid around incrementally advanced a length corresponding to the development of two successive attachment points of one Belt by passing through the line connecting the fastening point on the other belt, whereupon the straps and the grid are connected at the fastening points and the reinforcement produced in this way, if necessary is cut to suitable lengths, 2. The method according to claim 1, characterized in that the material used for the production of the straps and the grid is rolled up on spools and through one for alignment serving mechanical straightening device as well as a mechanical Shaping device is guided in such a way that the advance of the material used to form the straps is the same at each step, while the feed of the material used to manufacture the grating is alternated through a a transverse and about a quarter turn executing member around one of the development of one in the shaping device formed triangular brackets take the appropriate dimension, 909839/0 160 BATH this organ gives this material the triangular shape and the tip of the triangle to form a plane perpendicular to the plane of the lattice Twisted plane that determines the base width of the grid, prompting the material of a welding device to connect of the walings with the tips of the triangular lattice fed and the finished reinforcement in the area a saw is brought to the continuous tape by a number of control stops to any desired length cuts. 3. The method according to claim 1 or 2, characterized in that that smooth or profiled to form the straps . Steel wires of round or other cross-section can be used. 4. The method according to any one of claims 1 to 3, characterized in that band iron for the production of the straps uses v / earth. 5. The method according to any one of claims 1 to 4 »characterized in that that the band iron through a device serving between the straightening device and the shaping of the grid Inserted rolling mill V- or U-shaped cold-formed will. 6. The method according to any one of claims 1 to 5, characterized in that that the grid is welded to the belts by means of sheet metal rods «, 909839/0160
BAD ORlGlNAt 7. Device for performing the method according to one of claims 1 to 6, characterized by a straightening device, preferably a straightening stand known per se for straightening the steel wires, optionally a cold forming rolling mill for V- or U-shaped profiling of the band irons; by Pliers, which are arranged on slides, which are driven by push rods' perform a reciprocating longitudinal movement and thereby remove the wires and straps by the predetermined amount advance gradually; by a reciprocating transverse and rotational movement executing piston, the on at its end has a forked nose, between the forked legs of the wire forming the grid grasped and passed through the piston is moved so that it is simultaneously triangular · · rotated about 90; continue through a Welding device with one of the number of required Straps corresponding number of electrode clamps; by a Sawing device with a circular saw of automatic feed and electrical control by relay, which is through contacts are controllable, which are actuated by the continuous band forming the reinforcement and are arranged on its movement path at two points, the first of which is the rotation the saw and the second causes the saw to advance and the reinforcement to be cut to the desired length, 8. The device according to claim ¹ J, characterized in that the piston serving to shape the grid by means of a push rod, a lifting mechanism or a screw spindle 'juer back and forth and through a with a ^ m piston bb-feati ^ - 909839/0160 BATH - th pin cooperating helical groove of the guide sleeve is movable in an "amount of rotation" of about 90 °, 9e device according to claim 7 or 8, characterized in that that the shape of the grid serving piston a. Sleeve penetrates, which has a groove with two parallel axes to the sleeve extending and connected by a helical part Parts penetrated and that a pin firmly connected to the piston engages in the hat and the rotation of the piston by 90 ° during its longitudinal displacement causes. 10p device according to claim 7 to 9 '»characterized in that that the Versohiebebewege of the piston is carried out by a push rod, which by a crankshaft or a crank disk is operated, 11 «Device according to claim 7 to 10, characterized in that that the Verschiß movement of the piston was carried out by a hydraulic lifting mechanism 12. Device according to one of claims 7 to 1t, characterized in that the displacement movement of the piston duroh a turning spindle takes place. 909839/0160