FR2674558A1 - UNIVERSAL DRESSER FOR ROUND BUILDINGS IN CONCRETE. - Google Patents

Abstract

The invention relates to a folder-sectioner for making reinforcement frames in reinforcing bars, of the type in which a finger provided with a roller pivots at an adjustable angle around a circular mandrel to bend the round at concrete around the latter. It further comprises a shear, one of the blades (7) of which is located in a recess (5) of the circular mandrel (1), said recess (5) being located in the vicinity of the point (6) where the reinforcing bar (4) comes into contact with the mandrel (1) at the start of the bending process.

Description

The present invention relates to a folder-cutting machine for

  in particular, to produce frames in concrete reinforcing bars and a universal dresser using this folder-cutter for making reinforcement bars and the use of the latter for

armatures manufacturing.

  It is known that the realization of reinforced concrete structures requires reinforcements of a very varied shape and size, which are most often constituted by longitudinal elements folded at their ends and connected to each other by frames also made of wire.

folded steel.

  According to the current technique, the longitudinal elements are made using a trainer that sends a predetermined length of wire in a chute which launches on a folding table which folds

  pin the ends of the elongated elements.

  The frames are made using another machine called camera operator which has at least one folding head fed by a trainer. With the machines of this type known to date, the position of the shear which cuts the concrete ring before the folding head requires the backing to be made to move back and forth to limit a length the free end of the concrete slab used for

realization of a framework.

  The object of the present invention is to provide a folder-cutting machine which makes it possible to cut the concrete ring in the immediate vicinity of its last fold without having to communicate to it any movements.

back and forth.

  Another object of the present invention is to provide a single machine which, by the combination of its different elements, makes it possible to produce both the longitudinal elements of the frames and the frames

which brings them together.

  The present invention relates to a folder-cutting machine for producing reinforcement frames in concrete rings, of the type in which a finger provided with a roller pivots at an adjustable angle around a circular mandrel to bend the round to concrete around the latter, characterized in that it further comprises a shear, one of whose blades is located in a recess of the circular mandrel, said recess being located in the vicinity of the point where the concrete ring comes into contact with the mandrel.

beginning of the folding process.

  According to the invention, the movable blade of the shears is advantageously located in the recess of the mandrel when the latter is of sufficient size. In the opposite case, it is advantageous to secure the fixed blade of the shears with the mandrel. circular which thus cash shear forces produced by the movable blade which is located

the other side of the concrete ring.

  The present invention also relates to a form-forming machine for concrete rounds, characterized in that it comprises in combination: a dresser fed by at least one coil of concrete rounds; a chute intended to receive a section of concrete bar of predetermined length previously erected; a folding table disposed below the chute, which table comprises a folding machine-cutter according to the invention of the previously described type arranged in a displaceable manner along the chute and located on the opposite side to the trainer and a folding head possibly likely to be moved along the chute between the folder-cutter and the trainer; a device for moving the straightener between a high position where it sends the concrete ring erected in the chute and a low position where it sends the concrete ring erected on the folder-cutter; and a shear disposed between the chute and the exit of the trainer when

  the latter is in the high position.

  The trainer-former according to the invention firstly makes it possible to produce the longitudinal elements of the reinforced concrete reinforcements by sending into the trough a section of standing concrete round of predetermined length, after which this section falls on the folding table. whose folding head and the folder-cutting machine are placed close to the ends of the section of the concrete slab and provide for the folding of the ends

  of the latter and the realization of the pins.

  The trainer-former according to the invention also makes it easy to produce even small frames, thanks to the fact that the folder-cutting machine which is in the vicinity of the trainer makes it possible to cut the concrete round in the vicinity of the last folding without having to him

  communicate a movement back and forth.

  Thus, at a lower cost, a universal machine is obtained which

  allows to realize all types of reinforcement.

  The subject of the invention is also the methods of using

  the dresser-trainer defined above.

  In order to better understand the invention, will now be described by way of illustration and without any limiting character, an embodiment taken as an example and shown on the

attached drawing.

  In this drawing, FIG. 1 is a diagrammatic view of a first embodiment of a folding machine according to the invention, FIG. 2 is a diagrammatic view of a second embodiment of a folder. FIG. 3 is a schematic view of an embodiment of the form-forming machine according to the invention used to produce the elongated elements of the frames, FIG. 4 is a schematic view of the machine of FIG. 3 is used for making reinforcement frames, FIG. 5 is a larger-scale section along VV of FIG. 4,

  and FIG. 6 is a sectional view along VI-VI of FIG. 4.

  FIG. 1 schematically shows a first embodiment of

  production of a folder-cutting machine according to the invention.

  This folder-cutting machine comprises, in the known manner, a circular folding mandrel I and a folding finger 2 which is provided with its

  end of a roller 3 and which can be pivoted about the axis of the mandrel 1.

  It is conceivable that the concrete bar 4 which is held in position by its right part, is caused to wind around the mandrel 1 when the folding finger 2 and its roller 3 move in the direction of the arrow F in

  pivoting about the axis of the mandrel 1.

  According to the invention, the mandrel 1 comprises a recess 5 in the vicinity of the point 6 o the concrete ring 4 comes into contact with it at the beginning of the

folding process.

  This recess is intended to receive the blade 7 of a shear which

  the other blade 8 is arranged on the other side of the concrete ring 4.

  In the embodiment of FIG. 1, which corresponds to folds of relatively large diameter, the two blades 6 and 7 of the shear can be actuated independently of the mandrel 1 which therefore undergoes no shear forces. For example, blade 7

  can be advantageously displaced relative to the blade 8.

  FIG. 2 shows a second embodiment of the ply-sectioner according to the invention which corresponds to bends on

  a mandrel 1 of smaller diameter.

  FIG. 2 shows the folding finger 2 as well as its

roller 3 and the concrete bar 4.

  In this embodiment, the fixed blade 7 of the shear is integral with the mandrel 1, while the movable blade 8 cuts the concrete round 4 which bears on the blade 7, which is supported by the mandrel

  1 which is integral with the frame of the machine.

  It can be seen that in these two embodiments, the concrete ring 4 can be cut at a point very close to the point 6 which is the one to

  from which the concrete ring 4 begins to be folded back on itself.

  As a result, without having to move any movement back and forth on the concrete bar 4, we can choose a length as short as desired for the end of the concrete ring which is

  the pin beyond its last fold.

  It should also be noted that the recess 5 in which the blade 7 of the shears is located can occupy less than a quarter of a circle, which makes it possible to make folds at more than 2700, and which is greater than what has been

need in practice.

  The shear force between the two blades 7 and 8 is made in the known manner, for example using a hydraulic or pneumatic cylinder. FIGS. 3 and 4 show a dresser-shaper according to the invention which comprises a straightener 10 provided with feeding rollers 11 for pushing the concrete bar 4 coming from the reels 9 between stacking rollers 12 and 13 arranged in planes perpendicular In this way, the concrete ring 4 which is erected when it enters the formeuse. According to the invention, the latter comprises a chute 14 disposed above a folding table 15 which comprises on the one hand a folder-cutting machine 16 according to the invention of the type shown in Figures 1 and 2 and On the other hand a folding head 17 These two members 16 and 17 can be positioned anywhere along the entire length of the folding table 15 As shown in the drawing, the folder-cutting machine 16 is advantageously arranged on the table. fold

  opposite the folding head 17.

  According to one variant, the folding plate 9 can be maintained in

fixed position.

  FIG. 5 shows a larger sectional view along V-V of FIG. 4, which shows the chute 14 which can

  receive a section of concrete round 4.

  We also see in this figure, the folding head 17 which is constituted by a mandrel 18 against which comes to bear a concrete ring 4 which is pressed by a movable finger 19 which is provided with a not shown roller and which can be pivoted around the mandrel 18 from an angle

  predetermined to ensure the bending of the concrete bar 4 around the mandrel.

  - We see in Figure 6 which is a larger scale view in section VI-VI of Figure 4 the dresser 10 and pebbles

  He who receive the concrete ring to train 4.

  According to the invention, the dresser 10 is mounted on a support 20 hinged at 21 on the frame of the machine while a jack 22 is hinged at 23 on the frame of the machine and 24 on the support 20 of the machine.

the trainer 10.

  In this way, thanks to the jack 22, it is possible to tilt the dresser 10 around its axis of articulation 21 between two positions namely a high position for which the concrete bar 4 coming out of the dresser 10 is in the axis of the chute 14 and a low position for which the concrete ring 4 coming out of the straightener 10 is in front of the folding head 17 as shown in 4 on the

figure 5.

  The different movements of the different parts of the machine that has just been described can be controlled by a microcomputer, in particular, the lengths of the different sections of concrete ring that are cut by the trainer, the position of the folder-cutting machine. and that

  of the folding head as well as the folding angles of each of them.

  The machine just described works the way

next.

  To produce the longitudinal elements of the reinforcements, the straightener 10 is placed in the up position by means of the jack 22 In this position, it sends into the trough 14 a predetermined length of erected concrete ring which is conventionally cut for example to the help

of a shear not shown.

  Thanks to a device of known type, for example by tilting, chute 14 discharges the section of round concrete 4 erected on the folding table 15 of which the folder-cutter 16 and the folding head 17 have been previously brought into positions which depend on the length of the section of round concrete 4 It is sufficient that the folding-sectioning machine 16 and the folding head 17 fold the two ends of the concrete ring to obtain the longitudinal element Of course, the shears -de the

  Folder-cutter is not used on this occasion.

  To produce the frames, the dresser 10 is brought into the lower position by acting on the jack 22 while the folding-cutting machine 16 is brought to the right The straightener 10 then sends the bending-sectioning machine 16 a length of round concrete 4 such that the latter exceeds the folder 16 enough to make a hook that is

  obtained by pivoting the folding roller 3 (FIGS. 1 and 2).

6 2674558

  The straightener 10 then advances the concrete bar 4 with a length corresponding to one side of the frame, then the folding roller 3 carries out the bending of the concrete bar 4 and so on until the formation of the

different sides of the frame.

  When the frame is thus produced, the reinforcing bar 4 is advanced according to the length of the pin that it is desired to obtain and by actuating the blades 7, 8 of the shear to cut the concrete bar,

frees the frame of the trainer.

  It can be seen that the invention makes it possible in a simple manner to produce an efficient universal manchine that can make all the parts

  necessary to obtain reinforcement for reinforced concrete.

  It is understood that the embodiments described above are not limiting and they can receive any desirable modifications without departing from the scope of the invention. In particular, it is clear that the movement of the dresser between the high position and its low position can be realized in a manner

  different than that shown in Figure 4.

  Similarly, the folding head 17 can be secured to a fixed position.

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Claims (5)

  1 Folder-cutter for making reinforcement frames in concrete reinforcing bars, of the type in which a finger provided with a roller pivots at an adjustable angle around a circular mandrel for bending the concrete round around the latter, characterized in that it further comprises a shear, one of which blades (7) is located in a recess (5) of the circular mandrel (1), said recess (5) being located in the vicinity of the point (6) where the concrete bar (4) comes into contact with the mandrel (1) at the beginning of the folding process. 2 Folder-cutter according to claim 1, characterized in that the movable blade (7) of the shears is arranged in the recess (5) of the mandrel.   3 Folder-cutter according to claim 1, characterized in that the fixed blade (7) of the shear which is housed in the recess (5) of the mandrel (1) is integral with the latter, the mandrel   supporting the shear forces produced by the movable blade (8).   4 Trainer-former for concrete rounds, using a   folder-cutting machine according to one of the preceding claims,   characterized in that it comprises in combination: a dresser (10) fed by at least one coil (9) of round; a chute (14) for receiving a section of concrete bar of predetermined length previously erected; a folding table (15) disposed below the chute (14), a table which comprises a folder-cutting machine   according to any one of claims 1 to 3, disposed so   movable along the chute (14) and located on the opposite side to the dresser (10) and a folding head (17) possibly movable along the chute (14) between the folder-cutting machine (16) and the trainer (10); a device (20, 22) for moving the straightener (10) between a high position (Figure 3) where it sends the standing concrete in the trough (14) and a low position (Figure 4) where it sends the round concrete set on the folder-cutter (16); and a shear disposed between the chute (14) and the output of the dresser (10) -when   the latter is in the high position.   A method of manufacturing a longitudinal reinforcing member for reinforced concrete using the form-forming machine according to claim 4, characterized in that the dresser (10) is placed in the raised position; that a length of rounded concrete is sent into the trough (14); that we cut the length of round concrete; that the folder-cutter (16) and possibly the folding head (17) are brought 8 2674558   in the vicinity of the ends of the section of round concrete; pouring the section of concrete ring contained in the chute on the folding table and folding the ends of the section of concrete round with the help of the folder-cutter (16) and the folding head (17) for constituting the pins.   6 Process for producing a reinforcement frame for reinforced concrete using the form-forming machine according to Claim 4, characterized in that the stand erager (10) is placed in the lower position; a length of concrete ring (4) is placed on the folder-cutting machine (16); that the end of the concrete slab is bent; that we renew this process until the framework is completed; and that, actuating the blades (7, 8) of the shear, the concrete bar is sheared to detach the frame thus form.