EP0727549A1 - Twisting tool for binding reinforcing bars of concrete constructions - Google Patents

Twisting tool for binding reinforcing bars of concrete constructions Download PDF

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Publication number
EP0727549A1
EP0727549A1 EP96101251A EP96101251A EP0727549A1 EP 0727549 A1 EP0727549 A1 EP 0727549A1 EP 96101251 A EP96101251 A EP 96101251A EP 96101251 A EP96101251 A EP 96101251A EP 0727549 A1 EP0727549 A1 EP 0727549A1
Authority
EP
European Patent Office
Prior art keywords
clamp
pliers
wire
ligature
arm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96101251A
Other languages
German (de)
French (fr)
Inventor
Giuseppe Verlato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CERSEC SRL, CENTRO DI RICERCA SPERIMENTALE E CERTI
Original Assignee
CERSEC SRL CENTRO DI RICERCA SPERIMENTALE E CERTIFICAZIONE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from IT95VI000029A external-priority patent/IT1280278B1/en
Priority claimed from IT95VI000129 external-priority patent/IT1281621B1/en
Application filed by CERSEC SRL CENTRO DI RICERCA SPERIMENTALE E CERTIFICAZIONE filed Critical CERSEC SRL CENTRO DI RICERCA SPERIMENTALE E CERTIFICAZIONE
Publication of EP0727549A1 publication Critical patent/EP0727549A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/122—Machines for joining reinforcing bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F15/00—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire
    • B21F15/02—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire
    • B21F15/04—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire without additional connecting elements or material, e.g. by twisting
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/122—Machines for joining reinforcing bars
    • E04G21/123—Wire twisting tools

Definitions

  • the subject of the present invention is a rotary clamp capable of facilitating the binding of reinforcing bars of concrete structures in the building and of ensuring the cutting of assembly wires.
  • the purpose of the tweezers according to the invention is to significantly reduce the fatigue of the worker, who no longer has to rotate the pliers to twist the ligature wire before cutting it.
  • This clamp is defined in claim 1. It has on one of its two handles a thread capable of being rotated using a suitable sleeve provided with balls, which is simply pulled by the operator after the ligature wire has been gripped by the pliers.
  • a specially provided lever which is placed on the opposite arm of the pliers and which attacks a groove conjugated with an appropriate roller, makes it possible to keep the pliers closed at the desired pressure, without cutting the wire during the operation of rotation of this pliers .
  • the clamping mechanism of the clamp is immobilized by means of a profiled tongue which hooks the opposite lever of the clamp to be able to block it.
  • the profiled tongue can rotate and it is in turn fixed to the opposite handle of the clamp, that is to say that which is provided with the operating screw, while a spiral spring, mounted on the pivot pivot of the tongue, allows to keep it apart so that it remains open when you have to operate the clamp.
  • the wire necessary for blocking the reinforcing bars is contained in a suitable container which is fixed to the lever for operating the pliers, opposite to that which is provided with the maneuvering screw, this container can however be easily dismantled in the event that it would interfere with the operation of the clamp in certain working positions.
  • the wires necessary for performing ligatures of both single and double irons are stored in suitable means which can be attached to the leg, the bust or the arm of operator so that it can be easily entered at the time of use.
  • the tweezers according to the invention is of a shape such that the operator can handle it with one hand.
  • the rotary clamp according to the invention comprises an arm 1 provided with a large pitch screw 2 (to the right or to the left) disposed inside a sleeve 3 provided with balls held by a fluted collar, according to a known arrangement, sleeve which is pulled to rotate the clamp.
  • the jaws 4 and 5 of the pliers grip the wire 6 of the frame 7 ligature, in order to be able to twist it around the stirrup which surrounds the longitudinal bar of the frame, and to cut it as we will see better later .
  • an eccentric 9 which carries the screw 10 on which is movable the operating lever 11 which carries on the opposite side a screw 12 which protrudes by a movable point in the profiled groove 13 formed on arm 1 of the clamp.
  • the clamp is closed by hand, acting in the direction of the arrow 14 on the lever 8 and then rotating the lever 11 in the direction of the arrow 15, so as to circulate the lug 12 in groove 13, as seen in Figures 3 and 4.
  • the screw 16 provided with the spring 17, determines the position of the eccentric 9, adjustable as a function of the thickness and of the characteristics of the ligature wire 6 which is to be twisted and cut.
  • the eccentric 9 in the form of a disc mounted on a pivot which emerges from the operating lever 11, is fixed in the desired position by means of the screw 19, which acts on one of the holes 20, and it can be recalled by the spring 17 attached to the screw 16, in function of the characteristics of dimension or rigidity of the ligature wire 6.
  • the clamp comprises a first arm 21 provided with a large pitch screw 22 on which turns a sleeve 23 with which it is possible after having grasped it turn the clamp, while the second arm 38 is used to maneuver the clamp on closing, by forcing the jaws 24 and 25 to cut the ligature wire 26 which surrounds the reinforcing bars 27.
  • the wire 6 unwinds from the spool contained in the container 28 fixed to the arm 38 of the clamp, by means of a pin 29 which can be dismantled easily if necessary.
  • An originality of the clamp resides in that a suitable tongue 30, wound on the arm 21, allows the clamp to be closed on the wire 26, to allow the operator to twist it as can be seen in FIG. 7, before to cut it definitively, by an operation of stronger tightening of the lever 38, at the end of the operation.
  • the tongue 30 is provided at its free end with an elbow 33 formed on a sheet metal element 31 which is fixed to the tongue 30 by means of a bolt 32 which can circulate in the hole 34 (FIG. 6) to allow the hooking of the arm 38 of the clamp.
  • the tongue 30 securely retains the clamp in the closed position when necessary while that when the wire 26 is cut, it returns to the free position, thanks to the presence of a return spring not visible in FIG. 6.
  • the screw 32 makes it possible to move the position of the piece of folded tongue 33 in the vertical direction, as a function of the thickness of the wires 26 which are to be twisted and cut.
  • the wire 26 which links the circles 27 unwinds from a spool 35 mounted on a double-bend stirrup 26, by means of a journal 37, stirrup which is in turn fixed to the arm 38 of the pliers by means of a journal.
  • This construction variant provides that the wire 26 is wound externally on the reel mounted on the pin 37 and this, unlike the solution shown in FIGS. 5 and 7, where the wire 26 is contained inside the container 28.
  • the wires 26 are constituted by single wires, as represented in FIG. 10, or by a double wire as represented in FIG. 11, with a length of 30 to 60 cm, of any of a length less than that of the sleeve 23, and which are grouped in packages and held together by a permanent magnet 39 fixed either on the bottom of the container 20, or along the body of the container and attached to the body of the operator either to one leg, as shown in Figure 12, or to the central part of the body as shown in Figure 13, or to an arm at the as illustrated in Figure 14.
  • the pliers described above can also be used in the traditional way, without pulling the sleeve 33, when it is desired to modify the final position of ligation of the wire 6.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Surgical Instruments (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Dowels (AREA)

Abstract

The tool consists of a pair of pincers with handles (1,8) connected to a pair of jaws (4), and a locking lever (11). One of the handles (1) is equipped with a mechanism to rotate the tool, made in the form of a long-pitch spiral (2) and a sleeve (3) with retaining balls in a collar. After a wire loop (6) has been passed round two or more rods (7) its two ends are gripped by the pincer jaws and locked in place. The tool is then rotated by pulling on the sleeve (3) so that the balls inside it interact with the spiral, twisting the ends of the wire loop together.

Description

La présente invention a pour objet une pince tournante apte à faciliter la ligature des fers d'armature des ouvrages en béton du bâtiment et à assurer le sectionnement des fils d'assemblage.The subject of the present invention is a rotary clamp capable of facilitating the binding of reinforcing bars of concrete structures in the building and of ensuring the cutting of assembly wires.

On sait que les fers destinés à former les armatures des ouvrages en béton armé du bâtiment doivent être liés entre eux pour pouvoir conserver la position prise avant d'effectuer la coulée en béton.It is known that the irons intended to form the reinforcements of the reinforced concrete structures of the building must be linked together in order to be able to maintain the position taken before carrying out the concrete casting.

Ces opérations de ligature exigent un emploi important de main d'oeuvre, qui est bien connu de toutes les personnes qui travaillent dans ce secteur et qui entraîne, après de nombreuses heures de travail, une fatigue contraignante.These ligation operations require a significant employment of labor, which is well known to all those working in this sector and which leads, after many hours of work, to binding fatigue.

Le but de la pince tournante selon l'invention est de réduire nettement la fatique de l'ouvrier, qui n'a plus à faire tourner la pince pour tordre le fil de ligature avant de le couper.The purpose of the tweezers according to the invention is to significantly reduce the fatigue of the worker, who no longer has to rotate the pliers to twist the ligature wire before cutting it.

Cette pince est définie à la revendication 1. Elle comporte sur l'une de ses deux poignées un filetage apte à être mis en rotation à l'aide d'un manchon approprié muni de billes, qui est simplement tiré par l'opérateur après que le fil de ligature a été saisi par la pince.This clamp is defined in claim 1. It has on one of its two handles a thread capable of being rotated using a suitable sleeve provided with balls, which is simply pulled by the operator after the ligature wire has been gripped by the pliers.

Un levier spécialement prévu, qui est placé sur le bras opposé de la pince et qui attaque une rainure conjuguée avec un galet approprié, permet de maintenir la pince fermée à la pression désirée, sans couper le fil pendant l'opération de rotation de cette pince.A specially provided lever, which is placed on the opposite arm of the pliers and which attacks a groove conjugated with an appropriate roller, makes it possible to keep the pliers closed at the desired pressure, without cutting the wire during the operation of rotation of this pliers .

En saisissant avec la main les deux bras de la pince, il est possible d'effectuer la coupe du fil après l'exécution de la rotation.By grasping the two arms of the pliers with your hand, it is possible to cut the wire after the rotation has been carried out.

On prévoit par ailleurs de préparer une vis de retenue, montée sur un excentrique réglable en position pour déterminer la position d'arrêt de la pince en fonction de l'épaisseur du fil de ligature, en en bloquant la position à la valeur désirée, position qui sera ensuite conservée jusqu'à ce qu'on modifie les caractéristiques du fil de ligature qu'il s'agit de tordre et de couper.We also plan to prepare a retaining screw, mounted on an eccentric adjustable in position to determine the stop position of the clamp according to the thickness of the wire. of ligature, by blocking the position to the desired value, position which will then be kept until the characteristics of the ligature wire which it is to twist and cut are changed.

Selon une variante, on prévoit que le mécanisme de blocage de la pince est immobilisé au moyen d'une languette profilée qui vient accrocher le levier opposé de la pince pour pouvoir le bloquer.Alternatively, it is provided that the clamping mechanism of the clamp is immobilized by means of a profiled tongue which hooks the opposite lever of the clamp to be able to block it.

Naturellement, la languette profilée peut tourner et elle est à son tour fixée à la poignée opposée de la pince, c'est-à-dire à celle qui est munie de la vis de manoeuvre, tandis qu'un ressort spirale, monté sur le pivot de rotation de la languette, permet de la maintenir écartée de manière qu'elle reste ouverte lorsqu'on a à manoeuvrer la pince.Naturally, the profiled tongue can rotate and it is in turn fixed to the opposite handle of the clamp, that is to say that which is provided with the operating screw, while a spiral spring, mounted on the pivot pivot of the tongue, allows to keep it apart so that it remains open when you have to operate the clamp.

Selon une autre caractéristique originale de l'invention, on prévoit que le fil nécessaire pour le blocage des fers ronds d'armature est contenu dans un récipient approprié qui se fixe au levier de manoeuvre de la pince, opposé à celui qui est muni de la vis de manoeuvre, ce récipient pouvant cependant être facilement démonté pour le cas où il gênerait la manoeuvre de la pince dans certaines positions de travail.According to another original characteristic of the invention, it is provided that the wire necessary for blocking the reinforcing bars is contained in a suitable container which is fixed to the lever for operating the pliers, opposite to that which is provided with the maneuvering screw, this container can however be easily dismantled in the event that it would interfere with the operation of the clamp in certain working positions.

On prévoit aussi la possibilité de réaliser un récipient de fil au moyen d'une simple bobine montée sur un dévidoir approprié retenu par un étrier qui peut tourner sur un axe fixé au levier de manoeuvre de la pince, ce récipient étant lui aussi démontable si nécessaire.There is also the possibility of making a wire container by means of a simple spool mounted on an appropriate reel retained by a stirrup which can rotate on an axis fixed to the lever for operating the pliers, this container also being removable if necessary. .

Selon une autre caractéristique de l'invention, on prévoit que les fils nécessaires pour effectuer les ligatures des fers aussi bien à simple qu'à double, soient rangés dans des moyens appropriés qui peuvent être attachés à la jambe, au buste ou au bras de l'opérateur pour pouvoir être saisis facilement au moment de l'utilisation.According to another characteristic of the invention, it is provided that the wires necessary for performing ligatures of both single and double irons are stored in suitable means which can be attached to the leg, the bust or the arm of operator so that it can be easily entered at the time of use.

On notera que la pince tournante selon l'invention est d'une forme telle que l'opérateur puisse la manipuler d'une seule main.Note that the tweezers according to the invention is of a shape such that the operator can handle it with one hand.

Le dessin annexé, donné à titre d'exemple, pemettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :

  • Figure 1 est une vue de la pince dans une première forme de réalisation, en position ouverte ;
  • Figure 2 représente un détail relatif à une ligature des fils d'armature d'une poutre ;
  • Figure 3 représente la pince à la fin de la rotation du fil de ligature ;
  • Figure 4 illustre la même pince au moment de l'exécution de la coupe du fil de ligature ;
  • Figure 5 montre une deuxième forme possible de réalisation de la pince selon l'invention, en position ouverte ;
  • Figure 6 est une vue de côté opposé de la languette de fermeture de la pince ;
  • Figure 7 représente la pince dans la forme de réalisation selon figure 5, en position fermée ;
  • Figure 8 montre la pince en position ouverte, avec un dévidoir de fil présentant des caractéristiques différentes ;
  • Figure 9 illustre un écheveau de fils de ligature dont l'un est représenté à simple en figure 10 ;
  • Figure 11 montre ces fils sous une forme doublée, repliés sur eux-mêmes ;
  • Figure 12, 13 et 14 illustrent trois positions différentes dans lesquelles l'opérateur peut stocker l'écheveau de fil de ligature.
The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:
  • Figure 1 is a view of the clamp in a first embodiment, in the open position;
  • Figure 2 shows a detail relating to a ligature of the reinforcing wires of a beam;
  • Figure 3 shows the clip at the end of the rotation of the ligature wire;
  • Figure 4 illustrates the same clamp when performing the cutting of the ligature wire;
  • Figure 5 shows a second possible embodiment of the clamp according to the invention, in the open position;
  • Figure 6 is an opposite side view of the clamp closing tab;
  • Figure 7 shows the clamp in the embodiment according to Figure 5, in the closed position;
  • Figure 8 shows the clamp in the open position, with a wire feeder having different characteristics;
  • Figure 9 illustrates a skein of tying threads, one of which is shown in single in Figure 10;
  • Figure 11 shows these wires in a doubled form, folded back on themselves;
  • Figure 12, 13 and 14 illustrate three different positions in which the operator can store the skein of ligature wire.

Comme on peut le voir en figure 1, la pince tournante selon l'invention comprend un bras 1 muni d'une vis à grand pas 2 (à droite ou à gauche) disposée à l'intérieur d'un manchon 3 muni de billes maintenues par une collerette cannelée, selon une disposition connue en soi, manchon qu'on tire pour faire tourner la pince.As can be seen in FIG. 1, the rotary clamp according to the invention comprises an arm 1 provided with a large pitch screw 2 (to the right or to the left) disposed inside a sleeve 3 provided with balls held by a fluted collar, according to a known arrangement, sleeve which is pulled to rotate the clamp.

Les mâchoires 4 et 5 de la pince saisissent le fil 6 de ligature de l'armature 7, pour pouvoir le torsader autour de l'étrier qui entoure la barre longitudinale de l'armature, et le couper comme on le verra mieux par la suite.The jaws 4 and 5 of the pliers grip the wire 6 of the frame 7 ligature, in order to be able to twist it around the stirrup which surrounds the longitudinal bar of the frame, and to cut it as we will see better later .

Sur le bras 8 de la pince est monté un excentrique 9 qui porte la vis 10 sur laquelle est monté mobile le levier de manoeuvre 11 qui porte sur le côté opposé une vis 12 laquelle fait saillie par une pointe mobile dans la rainure profilée 13 pratiquée sur le bras 1 de la pince.On the arm 8 of the clamp is mounted an eccentric 9 which carries the screw 10 on which is movable the operating lever 11 which carries on the opposite side a screw 12 which protrudes by a movable point in the profiled groove 13 formed on arm 1 of the clamp.

La fermeture de la pince s'effectue à la main, en agissant dans le sens de la flèche 14 sur le levier 8 et en faisant ensuite tourner le levier 11 dans le sens de la flèche 15, de manière à faire circuler l'ergot 12 dans la rainure 13, comme on le voit en figures 3 et 4.The clamp is closed by hand, acting in the direction of the arrow 14 on the lever 8 and then rotating the lever 11 in the direction of the arrow 15, so as to circulate the lug 12 in groove 13, as seen in Figures 3 and 4.

La vis 16, munie du ressort 17, détermine la position de l'excentrique 9, réglable en fonction de l'épaisseur et des caractéristiques du fil de ligature 6 qu'il s'agit de tordre et de couper.The screw 16, provided with the spring 17, determines the position of the eccentric 9, adjustable as a function of the thickness and of the characteristics of the ligature wire 6 which is to be twisted and cut.

Dans la positon représentée en figure 3, le manchon 3 a été tiré en arrière, en provoquant la rotation de la vis 2 et de la poignée 1, ainsi que des deux mâchoires 4 et 5, ce qui entraîne la formation de quelques spires sur la ligature 6, avant la coupe, laquelle est exécutée en comprimant le levier 8 (figure 4) contre le manchon 3, qui a été préalablement ramené à la position initiale, avant la poussée à exécuter sur le levier dans le sens de la flèche 18.In the position shown in Figure 3, the sleeve 3 was pulled back, causing the rotation of the screw 2 and the handle 1, as well as the two jaws 4 and 5, which causes the formation of a few turns on the ligature 6, before the cut, which is carried out by compressing the lever 8 (figure 4) against the sleeve 3, which has previously been brought back to the initial position, before the thrust to be executed on the lever in the direction of arrow 18.

L'excentrique 9, en forme de disque monté sur un pivot qui émerge du levier de manoeuvte 11, est fixé dans la position désirée au moyen de la vis 19, qui agit sur l'un des trous 20, et il peut être rappelé par le ressort 17 accroché à la vis 16, en focntion des caractéristiques de dimension ou de rigidité du fil de ligature 6.The eccentric 9, in the form of a disc mounted on a pivot which emerges from the operating lever 11, is fixed in the desired position by means of the screw 19, which acts on one of the holes 20, and it can be recalled by the spring 17 attached to the screw 16, in function of the characteristics of dimension or rigidity of the ligature wire 6.

Comme on peut le voir, dans la forme de réalisation représentée en figure 5 et 7, la pince comprend un premier bras 21 muni d'une vis à grand pas 22 sur laquelle tourne un manchon 23 avec lequel on peut après l'avoir saisi faire tourner la pince, tandis que le deuxième bras 38 sert pour manoeuvrer la pince à la fermeture, en contraignant les mâchoires 24 et 25 à couper le fil de ligature 26 qui entoure les fers d'armature 27.As can be seen, in the embodiment shown in FIGS. 5 and 7, the clamp comprises a first arm 21 provided with a large pitch screw 22 on which turns a sleeve 23 with which it is possible after having grasped it turn the clamp, while the second arm 38 is used to maneuver the clamp on closing, by forcing the jaws 24 and 25 to cut the ligature wire 26 which surrounds the reinforcing bars 27.

Le fil 6 se déroule de la bobine contenue dans le récipient 28 fixé au bras 38 de la pince, au moyen d'un axe 29 qui peut être démonté facilement si nécessaire.The wire 6 unwinds from the spool contained in the container 28 fixed to the arm 38 of the clamp, by means of a pin 29 which can be dismantled easily if necessary.

Une originalité de la pince réside en ce qu'une languette appropriée 30, enroulée sur le bras 21, permet de fermet la pince sur le fil 26, pour permettre à l'opérateur de le tordre comme on peut le voir en figure 7, avant de le couper définitivement, par une manoeuvre de plus fort serrage du levier 38, à la fin de l'opération.An originality of the clamp resides in that a suitable tongue 30, wound on the arm 21, allows the clamp to be closed on the wire 26, to allow the operator to twist it as can be seen in FIG. 7, before to cut it definitively, by an operation of stronger tightening of the lever 38, at the end of the operation.

Naturellement la languette 30 est munie à son extrémité libre d'un coude 33 formé sur un élément de tôle 31 qui est fixé à la languette 30 au moyen d'un boulon 32 qui peut circuler dans le trou 34 (figure 6) pour permettre l'accrochage du bras 38 de la pince.Naturally the tongue 30 is provided at its free end with an elbow 33 formed on a sheet metal element 31 which is fixed to the tongue 30 by means of a bolt 32 which can circulate in the hole 34 (FIG. 6) to allow the hooking of the arm 38 of the clamp.

Par suite de son élasticité, la languette 30 retient solidement la pince en position fermée lorsque cela est nécessaire tandis qu'au moment de la coupe du fil 26, elle revient en position libre, grâce à la présence d'un ressort de rappel non visible en figure 6.Due to its elasticity, the tongue 30 securely retains the clamp in the closed position when necessary while that when the wire 26 is cut, it returns to the free position, thanks to the presence of a return spring not visible in FIG. 6.

La vis 32 permet de déplacer la position du morceau de languette repliée 33 dans la direction verticale, en fonction de l'épaisseur des fils 26 qu'il s'agit de tordre et de couper.The screw 32 makes it possible to move the position of the piece of folded tongue 33 in the vertical direction, as a function of the thickness of the wires 26 which are to be twisted and cut.

Dans la forme de réalisation représentée en figure 8, le fil 26 qui lie les ronds 27 se déroule d'une bobine 35 montée sur un étrier à double coude 26, au moyen d'un tourillon 37, étrier qui est à son tour fixé au bras 38 de la pince au moyen d'un tourillon.In the embodiment shown in FIG. 8, the wire 26 which links the circles 27 unwinds from a spool 35 mounted on a double-bend stirrup 26, by means of a journal 37, stirrup which is in turn fixed to the arm 38 of the pliers by means of a journal.

Cette variante de construction prévoit que le fil 26 est enroulé extérieurement sur le dévidoir monté sur le tourillon 37 et ceci à la différence de la solution représentée en figure 5 et 7, où le fil 26 est contenu à l'intérieur du récipient 28.This construction variant provides that the wire 26 is wound externally on the reel mounted on the pin 37 and this, unlike the solution shown in FIGS. 5 and 7, where the wire 26 is contained inside the container 28.

Il s'agit donc de deux solutions constituant des variantes, qui peuvent être choisies facilement par l'opérateur en fonction des exigences particulières auxquelles il doit faire face pendant le travail.They are therefore two solutions constituting variants, which can be easily chosen by the operator according to the particular requirements which he must face during work.

Bien entendu, ces deux solutions alternatives peuvent aussi être appliquées lorsque la pince présente la forme de réalisation représentée en figures 1 à 4.Of course, these two alternative solutions can also be applied when the clamp has the embodiment shown in FIGS. 1 to 4.

Pour la commodité de l'opérateur, on prévoit que les fils 26 sont constitués par des fils simples, comme représenté en figure 10, ou par un fil double comme représenté en figure 11, d'une longueur de 30 à 60 cm, de toute façon d'une longueur inférieure à celle du manchon 23, et qui sont regroupés en paquets et tenus ensemble par un aimant permanent 39 fixé soit sur le fond du récipient 20, soit le long du corps du récipient et attaché au corps de l'opérateur soit à une jambe, comme représenté en figure 12, soit à la partie centrale du corps comme représenté en figure 13, soit encore à un bras à la manière illustrée en figure 14.For the convenience of the operator, it is provided that the wires 26 are constituted by single wires, as represented in FIG. 10, or by a double wire as represented in FIG. 11, with a length of 30 to 60 cm, of any of a length less than that of the sleeve 23, and which are grouped in packages and held together by a permanent magnet 39 fixed either on the bottom of the container 20, or along the body of the container and attached to the body of the operator either to one leg, as shown in Figure 12, or to the central part of the body as shown in Figure 13, or to an arm at the as illustrated in Figure 14.

On comprend sans peine les avantages obtenus en adoptant la pince tournante selon l'invention, qui permet de tordre et de couper les fils de ligature d'une armature métallique pour coulée de béton armé sans devoir se préoccuper de faire tourner la pince à la main, mais en appliquant simplement une traction avec déplacement longitudinal d'un manchon monté sur l'une des poignées de la pince, convenablement réalisée sous une forme hélicoïdale, ce qui assure une notable réduction de la fatigue physique de l'opérateur.We easily understand the advantages obtained by adopting the tweezers according to the invention, which makes it possible to twist and cut the ligature wires of a metal frame for reinforced concrete casting without having to worry about turning the clamp by hand. , but by simply applying a traction with longitudinal displacement of a sleeve mounted on one of the grips of the clamp, suitably produced in a helical shape, which ensures a significant reduction in the physical fatigue of the operator.

Un réglage approprié de la position du petit levier de manoeuvre 11, réalisé au moyen du disque excentrique 9 muni de la vis d'arrêt 19 vissée dans les trous filetés 20, permet d'adapter la pince aux différents diamètres et aux différentes caractéristiques du fil de ligature, ainsi que de compenser l'usure progressive de l'outil.An appropriate adjustment of the position of the small operating lever 11, carried out by means of the eccentric disc 9 provided with the stop screw 19 screwed into the threaded holes 20, makes it possible to adapt the clamp to the different diameters and the different characteristics of the wire. of ligature, as well as to compensate for the progressive wear of the tool.

Toutefois, la pince décrite ci-dessus peut aussi être utilisée de la façon traditionnelle, sans tirer le manchon 33, lorsqu'on désire modifier la position finale de ligature du fil 6.However, the pliers described above can also be used in the traditional way, without pulling the sleeve 33, when it is desired to modify the final position of ligation of the wire 6.

La caractéristique originale de la variante de la pince représentée en figure 5 à 14, qui permet de manoeuvrer la pince en rotation au moyen du manchon 23 avec la certitude qu'elle restera fermée pendant l'opération, sans avoir à maintenir le bras 38 avec la main, ou sans devoir recourir au mécanisme excentrique à position réglable comme ceci est prévu dans la forme de réalisation représentée en figure 1 à 4, présente des avantages tout aussi évidents.The original characteristic of the variant of the clamp shown in FIG. 5 to 14, which allows the clamp to be maneuvered in rotation by means of the sleeve 23 with the certainty that it will remain closed during the operation, without having to hold the arm 38 with hand, or without having to resort to the eccentric mechanism with adjustable position as provided in the embodiment shown in Figure 1 to 4, has equally obvious advantages.

Claims (12)

Pince tournante pour lier les fers d'armature des ouvrages en béton, comprenant deux poignées (1, 8 et 21, 38) reliées aux mâchoires (4, 5 et 24, 25) de la pince, au moyen de laquelle on saisit le fil de ligature (6, 26) des fers d'armature (7, 27), caractérisée en ce que sur l'un des bras (1, 21) de la pince, avantageusement conformé à la manière d'une vis à grand pas (2, 22), est monté un manchon (3, 23) muni de billes retenues par une collerette rainurée, la traction exercé sur ce manchon faisant tourner la pince, en réalisant la ligature du fil (6, 26) sans devoir effectuer la rotation matérielle à la main, avec une notable économie de fatigue physique pour l'opérateur.Rotating clamp for binding the reinforcing bars of concrete structures, comprising two handles (1, 8 and 21, 38) connected to the jaws (4, 5 and 24, 25) of the clamp, by means of which the wire is gripped of ligature (6, 26) of reinforcing bars (7, 27), characterized in that on one of the arms (1, 21) of the pliers, advantageously shaped like a large pitch screw ( 2, 22), is mounted a sleeve (3, 23) provided with balls retained by a grooved collar, the traction exerted on this sleeve rotating the clamp, by performing the ligature of the wire (6, 26) without having to perform the rotation material by hand, with significant savings in physical fatigue for the operator. Pince tournante selon la revendication 1, caractérisée en ce qu'un levier de service approprié (11) monté sur un tourillon (10) qui fait saillie sur un disque excentrique (9) fixé sur ledit tourillon au moyen d'une vis (19) qui fait elle-même saillie sur la poignée (8) opposée de la pince, permet de maintenir les mâchoires (4 et 5) de la pince en position de fermeture pendant l'opération de rotation et avant de procéder à la coupe du fil de ligature (6).Rotating clamp according to claim 1, characterized in that a suitable service lever (11) mounted on a pin (10) which projects on an eccentric disc (9) fixed to said pin by means of a screw (19) which itself protrudes from the handle (8) opposite the pliers, keeps the jaws (4 and 5) of the pliers in the closed position during the rotation operation and before cutting the wire ligature (6). Pince tournante selon les revendications 1 et 2, caractérisée en ce que le disque excentrique (9), monté sur le tourillon (10) qui fait saillie sur la poignée (8) opposée de la pince, est fixé à la position désirée au moyen de la vis (19) qui agit sur l'un d'une série de trous (20), tout en étant rappelé par un ressort (17) accroché à une vis (16), en fonction des caractéristiques de dimensions et de rigidité du fil de ligature (10).Rotating clamp according to claims 1 and 2, characterized in that the eccentric disc (9), mounted on the pin (10) which projects on the handle (8) opposite the clamp, is fixed at the desired position by means of the screw (19) which acts on one of a series of holes (20), while being recalled by a spring (17) attached to a screw (16), according to the characteristics of dimension and rigidity of the wire ligature (10). Pince tournante selon les revendications 1 à 3, caractérisée en ce que la rainure (13) présente un profil particulier, qui dépend du degré de fermeture que l'on veut obtenir dans les mâchoires (4 et 5) de la pince.Rotating forceps according to claims 1 to 3, characterized in that the groove (13) has a particular profile, which depends on the degree of closure which is to be obtained in the jaws (4 and 5) of the forceps. Pince tournante selon la revendication 1, caractérisée en ce que sur le bras de la pince (21) qui porte le manchon (23) dans lequel est insérée la vis (22) servant pour la manoeuvre en rotation de la pince, est montée une languette mobile (30) qui permet de saisir le bras opposé (38) de la pince par son extrémité repliée, pour le maintenir solidement fermé pendant l'opération de rotation et de coupe du fil (26) de ligature de l'armature, cette languette (30) pouvant être facilement décrochée du bras (38) grâce à la présence d'un ressort de rappel pour libérer ce bras lorsque la pince doit être ramenée en position d'ouverture.Rotating pliers according to claim 1, characterized in that a tongue is mounted on the pliers arm (21) which carries the sleeve (23) in which is inserted the screw (22) used for the rotary actuation of the pliers mobile (30) which makes it possible to grip the opposite arm (38) of the clamp by its folded end, to keep it firmly closed during the operation of rotation and cutting of the wire (26) for tying the armature, this tongue (30) can be easily detached from the arm (38) thanks to the presence of a return spring to release this arm when the clamp must be returned to the open position. Pince tournante selon les revendications 1 à 5, caractérisée en ce que la languette (30) est réalisée en deux pièces (30 et 31), la deuxième étant assemblée à la première au moyen d'un boulon (32) inséré dans un trou oblong (34) afin de pouvoir adapter sa longueur en fonction des dimensions des fils de ligature à tordre.Rotating clamp according to claims 1 to 5, characterized in that the tongue (30) is made in two pieces (30 and 31), the second being assembled to the first by means of a bolt (32) inserted in an oblong hole (34) in order to be able to adapt its length as a function of the dimensions of the ligature wires to be twisted. Pince tournante selon les revendicaitons 1 à 6, caractérisée en ce que le fil de ligature (26) est contenu dans un dévidoir approprié réalisé à l'intérieur d'un récipient (28), qui peut être facilement attaché au bras (38) de la pince au moyen d'un tourillon (29).Rotating clamp according to claims 1 to 6, characterized in that the ligating wire (26) is contained in a suitable reel made inside a container (28), which can be easily attached to the arm (38) of the clamp by means of a pin (29). Pince tournante selon les revendications 1 à 7, caractérisée en ce que le fil de ligature (26) est enroulé sur une bobine (35) portée par un étrier (36) fixé au bras mobile (38) de fermeture de la pince, au moyen d'un tourillon (29) en constituant ainsi une variante de solution en réponse aux conditions d'encombrement pendant le travail.Rotating clamp according to Claims 1 to 7, characterized in that the ligating wire (26) is wound on a spool (35) carried by a stirrup (36) fixed to the movable arm (38) for closing the clamp, by means a journal (29) thus constituting a variant solution in response to the space requirements during work. Pince tournante selon les revendications 1 à 8, caractérisée en ce que les fils de ligature peuvent être de type simple, (figure 10), ou pliés en double (figure 11).Twist pliers according to Claims 1 to 8, characterized in that the ligating wires can be of the single type (Figure 10) or folded in double (Figure 11). Pince tournante selon les revendications 1 à 9, caractérisée en ce que les fils de ligature sont contenus dans un récipient (40) et retenus à l'intérieur de ce récipient au moyen d'un aimant permanent (39) solidaire du fond ou d'une paroi dudit récipient (40).Twist pliers according to Claims 1 to 9, characterized in that the ligating wires are contained in a container (40) and retained inside this container by means of a permanent magnet (39) secured to the bottom or a wall of said container (40). Pince tournante selon les revendications 1 à 10, caractérisée en ce que le paquet des fils de ligature est attaché au corps de l'opérateur soit à la jambe, soit au flanc ou à un bras de celui-ci, pour lui rendre plus commode l'utilisation des fils de ligature.Twist pliers according to claims 1 to 10, characterized in that the bundle of ligature wires is attached to the operator's body either to the leg, or to the side or to an arm thereof, to make it more convenient. use of ligature wires. Pince tournante selon les revendications 1 à 11, caractérisée en ce que la pince est manoeuvrée par l'opérateur avec une seule main.Rotating clamp according to claims 1 to 11, characterized in that the clamp is operated by the operator with one hand.
EP96101251A 1995-02-20 1996-01-30 Twisting tool for binding reinforcing bars of concrete constructions Withdrawn EP0727549A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT95VI000029A IT1280278B1 (en) 1995-02-20 1995-02-20 Rotating pliers for binding reinforcing bars in concrete construction
ITVI950029 1995-02-20
IT95VI000129 IT1281621B1 (en) 1995-07-31 1995-07-31 Concrete reinforcing rod tying tool - comprises two pincer with handles connected to jaws, and locking lever, including spiral rotary mechanism on one handle to twist wire ends together
ITVI950129 1995-07-31

Publications (1)

Publication Number Publication Date
EP0727549A1 true EP0727549A1 (en) 1996-08-21

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EP96101251A Withdrawn EP0727549A1 (en) 1995-02-20 1996-01-30 Twisting tool for binding reinforcing bars of concrete constructions

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US (1) US5669425A (en)
EP (1) EP0727549A1 (en)
CA (1) CA2169801A1 (en)

Cited By (2)

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CN101532335A (en) * 2009-02-16 2009-09-16 关春堂 A wrench specially used for binding reinforced bars
WO2016001472A1 (en) * 2014-07-04 2016-01-07 GARCÍA CORTÉS, Óscar Apparatus for tying vine to their supporting wire

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US7069962B2 (en) * 2004-08-27 2006-07-04 Dara Cheng Wire cutting and twisting tool with spool assembly and manual wire feeding mechanism
CN102596446A (en) * 2009-08-10 2012-07-18 明选国际汽配有限责任公司 Safety wire plier
CN112194035B (en) * 2020-08-24 2023-02-03 四川华胜农业股份有限公司 Method for maintaining vine frame of kiwi fruit plantation and inhaul cable jacking device adopted by method
EP4428326A1 (en) * 2023-03-09 2024-09-11 La Matassina SRL Twisting machine for twisting thread-like elements and tying structural elements

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EP0067789A1 (en) * 1981-06-11 1982-12-22 Daniel Schmidt Device for supplying, twisting and cutting the end of a metallic or plastic wire for use as a fastening
CH648085A5 (en) * 1984-07-26 1985-02-28 Gamper & Co Ag Unit for twisting two straight wire ends
EP0167795A1 (en) * 1984-06-08 1986-01-15 Morhard, Siegfried Method and apparatus (twisting tool) for twisting wire ends for the purpose of binding sacks, joining reinforcing rods in concrete structures, etc.

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FR1057559A (en) * 1952-05-30 1954-03-09 Cutting and rotating pliers for ligating reinforcing bars
FR2352637A2 (en) * 1976-05-25 1977-12-23 Bocos Gerard Portable tool for wire tying concrete reinforcement rods - has double helical grooved hollow shaft to twist wire passing axially to front jaws
FR2405769A1 (en) * 1977-03-01 1979-05-11 Molenaars Betonindustrie Bv Hand operated wire twisting tool - has torsion member accommodating ends to be joined under tension
EP0067789A1 (en) * 1981-06-11 1982-12-22 Daniel Schmidt Device for supplying, twisting and cutting the end of a metallic or plastic wire for use as a fastening
EP0167795A1 (en) * 1984-06-08 1986-01-15 Morhard, Siegfried Method and apparatus (twisting tool) for twisting wire ends for the purpose of binding sacks, joining reinforcing rods in concrete structures, etc.
CH648085A5 (en) * 1984-07-26 1985-02-28 Gamper & Co Ag Unit for twisting two straight wire ends

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101532335A (en) * 2009-02-16 2009-09-16 关春堂 A wrench specially used for binding reinforced bars
CN101532335B (en) * 2009-02-16 2013-03-27 关春堂 A wrench specially used for binding reinforced bars
WO2016001472A1 (en) * 2014-07-04 2016-01-07 GARCÍA CORTÉS, Óscar Apparatus for tying vine to their supporting wire

Also Published As

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US5669425A (en) 1997-09-23
CA2169801A1 (en) 1996-08-21

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