EP1020966A1 - System for inserting pins in devices like connectors - Google Patents

Abstract

Implantation system (1) has step-by-step advance and guiding unit (2) of continuous wire (F) and implantation unit (3) of wire sections in connector. Units can move relatively to each other so that they can move from first position, where continuous wire is introduced into implantation unit through advance and guiding unit, to second position where pin can be implanted, and vice versa.

Description

The present invention relates to a system for implanting pins in a device such as a connector, a printed circuit, a coil body, transformer or, in general, any device suitable for receiving pins. In the application described below, although non-exclusive, the system aims to implant the pins in the connector holes.

The term "pin" includes any type of male electrical contact or female, intended to be installed in a support or a base to constitute, after the insertion of the contacts in the support, a connector full electric can be attached to a device or terminate a cable.

• soit en les plaçant dans les orifices de moules et en surmoulant les broches avec une matière plastique appropriée composant l'embase des connecteurs à obtenir ;
• soit en insérant à force les broches dans les orifices prévus dans les embases en matière plastique, réalisées préalablement.

The pins to be implanted, commonly called "pins" by technicians before their implantation, are placed in the orifices or cells of the bases in two different ways:

• either by placing them in the mold holes and overmolding the pins with an appropriate plastic material making up the base of the connectors to be obtained;
• either by forcing the pins into the holes provided in the plastic bases, made beforehand.

Whichever method is used, rapid installation of pin is required anyway, which depends on the packaging some pins. Indeed, the pins can be loose, be placed on a carrier strip or be prepared in the form of sections precut continuous wire wound on a reel.

The system according to the invention essentially relates to the pins formed from separable sections of a continuous wire wrapped around of a coil, that is to say that the sections are arranged one at a time following the others, at the tail leu leu, and connected to each other by frangible zones of smaller section, constituting "notches".

A system for implanting pins from sections of a continuous wire from a coil is already taught by US patents 4,176,448 and 4,318,964.

This system allows you to unroll the sections of wire one by one, then to separate the first end section from the rest of the continuous wire and, finally, inserting said separate section into the hole in the connector support. Although it is widely used, this system nevertheless has drawbacks.

Indeed, it includes a punch type cutting mechanism to separate the end section from the rest of the continuous wire, which acts perpendicularly to the axis of the section, on the frangible zone concerned, by stamping. As the continuous wire constituting the pins is made in a soft conductive material (brass, bronze, ...), the frangible zone does not does not break openly, which leaves it at the end of the pins, a burr. This is all the more important as it is difficult to place the notch delimiting the frangible zone in optimal position relative to the punch of the mechanism, due to the length tolerances sections forming the future pins. So, such burrs may interfere with the actual connection operation and cause subsequent malfunctions.

Furthermore, another drawback of this prior system lies in the arrangement of the punch mechanism located near the section end to be separated from the rest of the wire, which leads to a bulky mechanical at the insertion clamp and excludes, moreover, the possibility to simultaneously install several pins, especially at the required steps currently which are less than 2 millimeters between two pins adjacent. A fortiori, the angled pin connectors, which include several rows of layout, first straight, straight pins decreasing in length from row to row, and angled pins at 90 ° in a subsequent operation, cannot be processed by the system described in the aforementioned patents.

This system has other drawbacks. It is notably relatively slow since it is limited to the insertion of a single pin at the time. The use of a punch mechanism by stamping results also noise pollution and cyclic shock and vibration always harmful to the system itself and its settings, as well that the accumulation of metallic particles produced by the mechanism at punch during the section separation operation. The punch must also be changed regularly.

The object of the present invention is to remedy these drawbacks and relates to a system which allows, in particular, a separation sections without burrs and without the need for rigorous indexing at level of the frangible zone, simultaneous implantation of several pins, may have different lengths and cross sections, and any layout configuration of said pins (by example four aligned pins, or four pins forming the vertices a square and a pin in the center, etc ...).

• en ce qu'il comporte :
  • une unité d'avance pas à pas et de guidage dudit fil continu, et
  • une unité d'implantation desdits tronçons de fil dans ledit dispositif ; et
• en ce que lesdites unités sont montées mobiles l'une par rapport à l'autre, de façon qu'elles puissent, à partir d'une première position de chargement dans laquelle le tronçon d'extrémité dudit fil continu est introduit dans ladite unité d'implantation par ladite unité d'avance et de guidage, se déplacer l'une par rapport à l'autre en séparant, par rupture de la zone frangible correspondante, ledit tronçon d'extrémité du reste du fil, jusqu'à une seconde position d'implantation dans laquelle ledit tronçon d'extrémité dudit fil, séparé du reste dudit fil, est apte à être implanté dans ledit dispositif, et inversement.

To this end, the system for implanting, in a device such as in particular a connector, pins formed by sections of a continuous wire and separable at the level of frangible zones connecting them one after the other, is remarkable, according to the invention:

• in that it includes:
  • a unit for advancing step by step and for guiding said continuous wire, and
  • a unit for implanting said sections of wire in said device; and
• in that said units are mounted movable with respect to each other, so that they can, from a first loading position in which the end section of said continuous wire is introduced into said unit 'implantation by said advance and guide unit, move relative to each other by separating, by breaking the corresponding frangible zone, said end section of the rest of the wire, to a second position implantation in which said end section of said wire, separated from the rest of said wire, is capable of being implanted in said device, and vice versa.

So, thanks to the system design in two advance units and implantation mobile relative to each other, the separation of end section of the rest of the wire is obtained by a simple movement relative between the two units, which causes the rupture of the frangible zone, and this without using any cutting mechanism such as a punch mechanism. This results in the absence of burrs, noise and vibrations, as well as reduced system maintenance, which guarantees increased operating reliability of the system according to the invention. Through elsewhere, the absence of a cutting mechanism near the section to be separated allows the installation of pins (separate sections) arranged according to reduced steps and even several pins simultaneously which can have different lengths and cross sections without being hindered by such a cutting mechanism, since the space around said units is then free.

Preferably, in said first position, the two units are aligned so that said end section introduced into the unit implantation and said rest of the wire guided in the advance unit have a rectilinear configuration defining the direction of advance of said wire, and that, in said second position, as a result of a relative movement between said units having caused the rupture of the corresponding frangible zone, said implantation unit is arranged transversely to said unit in advance, to allow the implantation of said end section in said device.

In particular, said relative movement between said units consists in a rotation of the implantation unit around a perpendicular axis in the direction of advance of said wire, to bring it from the first position aligned with the feed unit, at the second position, perpendicular to the previous one.

Structurally, the two units are carried by a frame, said implantation unit being mounted on a rotary shaft connected to said frame and perpendicular in the direction of advance of said wire, so as to allow, under the action drive means, the passage of said implantation unit from the first position to the second position and vice versa.

Advantageously, the two units are connected to each other by so that during the transition from the first position to the second position, the advance unit follows the implantation unit to allow a break smoothly of said frangible zone between said corresponding sections. So the separation takes place gradually and cleanly, allowing to obtain pins whose profile is devoid of any roughness and which have not undergone deformation.

In this case, said connection between the two units is defined by a articulation axis parallel to said rotary shaft and located opposite said frangible zone between said end section, housed in the implantation unit, and said remainder of the continuous wire, received in the feed unit, and said feed and guide unit is pivotally mounted about an axis of pivot, parallel to said articulation axis and carried by a slide which can slide along said frame, perpendicular to said pivot axes and articulation. Said pivot axis is preferably located at the rear of said advance and guide unit, opposite to said articulation axis units, located at the front of said advance unit. The unit of advance and guidance then performs an oscillating and sliding movement, in the manner a piston rod of a heat engine.

Furthermore, said advance and guide unit comprises at less a longitudinal guide channel receiving said wire and a mechanism in advance controllable cooperating with the latter to ensure the advance step by step of said continuous wire. Several longitudinal channels can be arranged parallel to each other to contain each a continuous thread. Several end sections can thus be separated to be received in the implantation unit and implanted in the base of the connector. Obviously, the number and arrangement of said channels can be any according to the requirements, for example we could have two, three, four or more channels arranged in a row, in a triangle, square, staggered, etc ... without departing from the scope of the invention, this which allows several pins to be installed simultaneously (end sections separated) in the connector base.

In a preferred embodiment, said implantation unit comprises a support associated with said rotary shaft and an implantation head slidably mounted on said support and provided at its end facing said advance unit in the first position, from less a housing in which can be received said end section of the wire. If the feed unit is provided with several channels each receiving a continuous wire, the implantation head is then provided with several housings in correspondence.

Furthermore, said system comprises means for controlling the sliding of said implantation head to ensure introduction of said end section in said device when said implantation unit occupies the second position.

For example, said control means may include a cam driven in rotation and linked, by a synchronization mechanism, to the rotary shaft carrying said implantation unit, so that, when the latter occupies said second position, the action of the cam causes said head to slide towards said device to implant said section.

In addition, holding means ensure locking in position of said end section in said housing of said implantation head, from the separation of said section from the rest of the wire until its implantation. Advantageously, said holding means are of the suction type and include a cooperating fluid power source with said housing by a conduit formed in said implantation head.

In addition, there is provided an elastic return element between said support and said head of the implantation unit to bring said head back inactive position after implantation of said section.

La figure 1 représente en plan le système d'implantation de broches selon l'invention, dans la première position desdites unités d'avance et d'implantation.

Les figures 2 et 3 sont respectivement des vues de dessus et de côté dudit système illustré sur la figure 1.

La figure 4 montre partiellement un fil continu constitué de tronçons successifs formant les broches à implanter.

La figure 5 est une vue agrandie de la figure 1 montrant l'agencement des broches dans la première position desdites unités.

Les figures 6 et 7 sont des vues en plan et de côté dudit système lorsque lesdites unités passent de la première position à la seconde position.

La figure 8 est une vue agrandie de la figure 6 montrant le processus de rupture du tronçon d'extrémité par rapport au reste dudit fil continu.

Les figures 9 et 10 sont des vues en plan et de côté dudit système lorsque lesdites unités occupent la seconde position.

La figure 11 est une vue agrandie de la figure 9 après la rupture du tronçon d'extrémité et avant son implantation dans l'orifice d'un connecteur.

Les figures 12 et 13 sont des vues en plan et de côté dudit système montrant l'action des moyens de commande sur ladite unité d'implantation pour introduire ledit tronçon d'extrémité dans ledit connecteur.

Les figures 14 et 15 sont des vues en plan et de côté dudit système après le rappel en position inactive de ladite unité d'implantation et avant le retour desdites unités vers la première position.

The figures of the appended drawing will make it clear how the invention can be implemented. In these figures, identical references designate similar elements.

Figure 1 shows in plan the spindle implantation system according to the invention, in the first position of said advance and implantation units.

Figures 2 and 3 are respectively top and side views of said system illustrated in Figure 1.

Figure 4 partially shows a continuous wire consisting of successive sections forming the pins to be implanted.

Figure 5 is an enlarged view of Figure 1 showing the arrangement of the pins in the first position of said units.

Figures 6 and 7 are plan and side views of said system when said units move from the first position to the second position.

Figure 8 is an enlarged view of Figure 6 showing the process of breaking the end section relative to the rest of said continuous wire.

Figures 9 and 10 are plan and side views of said system when said units occupy the second position.

Figure 11 is an enlarged view of Figure 9 after the breaking of the end section and before its implantation in the orifice of a connector.

Figures 12 and 13 are plan and side views of said system showing the action of the control means on said implantation unit to introduce said end section into said connector.

Figures 14 and 15 are plan and side views of said system after returning to the inactive position of said implantation unit and before the return of said units to the first position.

The purpose of system 1 shown in Figures 1 to 3 is to set up or inserting pins B into the holes of a connector C ready to cooperate, subsequently, with another connector with complementary pins. To supply system 1 with pins B, these are formed, as shown in Figure 4, by identical sections of a continuous wire F, connected one after the other by frangible zones Z of lower resistance forming "notches". The continuous wire F of sections comes from a coil not shown but in a manner known per se, and is unwound step by step by system 1 as we will see later, to separate the pin or end section BE from the rest of the wire F and install it in the corresponding hole in the connector.

In the example shown, system 1 can receive four wires continuous, arranged in parallel (in a horizontal row), to implant simultaneously, at each operating cycle, four pins in corresponding holes of the connector concerned. Of course, the number of continuous wires and their arrangement (aligned, in a triangle, square, staggered, etc.) could be different depending on the requirements, without departing from the scope of the invention.

The system 1 according to the invention comprises a step forward unit pitch and guide 2 of said continuous wires F in a direction of advance A and an implantation unit 3 of said end pins of the wires F in the connector.

The two units 2 and 3 are carried by a frame 4 in the form of a plate and they are mounted movable relative to each other to reversibly occupy a first extreme position of loading (Figures 1 to 3) in which the end sections or pins BE of the four parallel wires F are introduced into the implantation unit 3 by the feed unit 2, and, after moving one relative to the other and rupture of the corresponding frangible zones, one second extreme position of implantation (Figures 9 and 10) in which the BE end pins of the wires, separated from the rest of the four F wires, are suitable for being installed in the corresponding holes of connector C.

In the embodiment of said system 1, the implantation unit 3 is mounted on a rotary shaft 5 linked to the frame 4 and perpendicular to the sense of advance to said sons. This rotary shaft is linked to a drive motor 6 fixed to the frame 4, the plate of which is arranged in a vertical plane in the figures, so that the geometric axis of said shaft 5 is horizontal.

In particular, the installation unit 3 consists of a support 7 associated with the rotary shaft 5, and an implantation head 8 which is mounted sliding on a slide 9 provided on the support 7 and arranged perpendicularly to the geometric axis of said shaft 5. The head 8 has a tapered end 8A in which four housings are provided parallel 10 intended to receive the end pins BE of the wires. The other end 8B of the head is provided with a roller 11 able to cooperate with means 12 for controlling the sliding of the implantation head 8 relative to the support 7 and thus allow the insertion of the pins in the connector. Means 13 for holding the position of the separate spindle in the respective housing 10 are provided and include a fluidic suction source not shown, connected to the housing 10 by a conduit 8C formed in the head 8. Furthermore, an element to elastic return 14, such as a spring, is provided between the support and the head, parallel to the sliding direction of the latter in the support.

The advance and guide unit 2 comprises a support 15 which has four longitudinal and parallel channels 16 in which are arranged the continuous son F from the coils not shown. These four channels can be constituted by tubes or conduits, or by grooves or guide grooves forming, in all cases, channels guide 16 of said aligned sections of son F.

The stepwise and synchronized advance of the threads at each cycle of operation of system 1 is ensured by a feed mechanism 17 of the type with skids or ratchets, symbolized in the figures and cooperating by example with the frangible zone Z between two consecutive sections of each wire to advance it by a step equal to the length of said sections, towards the plant unit (of course, we could provide, in special cases of establishment, an independent advance of each wire or groups of wires).

For this, the advance 2 and implantation 3 units are aligned in the first loading position so that the channels 16 of unit 2 and the housings 10 of unit 3 are in correspondence and in the respective extension of each other.

Note, especially in Figure 5, that the ends in look 8A and 15A aligned units are spaced from each other and that the frangible zone Z between the end pin BE located in the housing 10 and the penultimate BP spindle guided in its channel 16 is found in the space between the units, almost all of the BE pins and BP being confined in the housing and the corresponding channel of said respective units.

In addition, the two units 2, 3 are connected to each other to ensure the desired kinematics of the system 1. In this example, the connection between the units is defined by an axis of articulation 19 associating the two supports 7 and 15 and parallel to the rotary shaft 5. This hinge pin 19 is also located substantially in the perpendicular extension of the frangible zone Z between the two end pins BE and BP of said son.

To allow the advance and guide unit 2 to follow the rotation of the implantation unit 3 as a result of its connection thereto with said articulation axis, said advance and guide unit 2 is mounted pivoting about a pivot axis 20 which is parallel to the axis of articulation 19 and which is carried by a slide 21 capable of sliding in a slide 22 secured to the frame and whose sliding direction is perpendicular to the pivot and articulation axes. This pivot axis 20 is located at the rear end 15B of unit 2, the front end 15A of which is facing the plant unit 3.

Thus, the guide unit 2 can be compared to the connecting rod of an engine thermal, of which the crankshaft would be the layout unit 3 and the piston, the slide 21.

The control means 12 for sliding the implantation head 8 include, in this embodiment, a cam 23 mounted on a shaft 24 which is carried by the frame and which is arranged parallel to the rotary shaft 5 of the implantation unit, directly above it. The shaft 24 of the cam 23 is mechanically connected to the rotary shaft 5 by an appropriate synchronization mechanism 25 so that the action of the cam on the implantation head of the unit is only possible when said implantation unit occupies the second position, as is will see later.

The operation of the implantation system 1 according to the invention takes place as follows.

First, assume that system 1 occupies the first extreme loading position illustrated in Figures 1, 2, 3 and 5 corresponding at the start of an operating cycle. In this first position, the two units are aligned horizontally, so that the housings 10 of the implantation head 8 are an extension of the guide channels 16 of the wires F. The end pins BE of the latter are brought, via the advance mechanism 17, into the housing of the implantation head which is in a position inactive with respect to the support 7 under the action of the return spring 14. The four frangible zones Z are then located between the two units, and are substantially aligned with the articulation axis 19 of the units.

At this time, the motor 6 rotates, via of its rotary shaft 5, the implantation unit 3 which rotates according to the arrow R to move from its horizontal position to a vertical position. The figures 6, 7 and 8 show an intermediate position of the implantation unit 3 which, by the hinge pin 19, drives with it the advance unit 2 in an oscillating and sliding movement, like a connecting rod of a heat engine. The front of the feed unit 2 follows the trajectory rotary described by the hinge pin 19, while the rear thereof follows a rectilinear trajectory along the slide 22 - slide 21 link, while pivoting around the pivot axis 20. During this movement, the BE end pins, located in the slots of unit 3, and the remains of continuous wires F, located in channels 16 of unit 2, bend gradually at their frangible zones Z to go from one state aligned to a folded state. In Figures 6, 7 and 8, the frangible zone Z begins to break gradually.

The rotation R of the implantation unit 3 continues until causing breaking of the frangible zone Z of each end pin BE with the rest of the continuous wire F, before the implantation unit occupies its second extreme position for which it is vertical, after an effective rotation of 90 °, as shown in Figures 9, 10 and 11.

Thanks to the connection between the units and rotational movements and resulting oscillation, breaking of frangible zones Z, resulting the separation of the two consecutive pins concerned BE and BP, takes place gradually and cleanly without creating a burr or deformation of said pins.

Before the planting unit 3 reaches the second position, the holding means 13 (Figure 11) act to immobilize, by suction via conduit 8C, each separate pin in its respective housing 10 and, more particularly, against the bottom 10A thereof. So, BE pins are held in slots 10 when the unit location 3 occupies its second position.

During the passage from the plant unit from the first to the second position, the shaft 24 carrying the cam 23 has rotated via the mechanism synchronization 25, so that cam 23 only enters in contact with the caster 11 of the implantation head only when the support of the implantation unit arrives in the second implantation position (Figures 9, 10).

The cycle of system 1 then continues, units 2 and 3 are immobilized in position by stopping the motor 6, while the profile 23A of the cam "attacks" the implantation head 8 which then slides relative to to its fixed support, in the direction of connector C symbolized on the Figures 12 and 13. Not to interfere with the sliding of the implantation head 8 in its vertical downward movement, the advance unit 2 is somewhat moved back by means of recall not shown or so it ceases to "follow" the implantation unit 3 as soon as the end section is separated by elastic stop means, not shown, provided for example between axis 19 and the feed unit 2. Obviously, the position of connector C is such that its receiving holes are opposite the pins to be implanted. During the movement of lowering of the head 8, passing from its inactive position to its active position, under the action of the cam profile, the spring 14 compresses and the end of each of the pins BE engages in the corresponding orifice of the connector C until the complete implantation of said pins. Of course, the means 13 for holding the pins are deactivated beforehand. In the position illustrated in FIG. 12, the eccentricity E of the cam relative to the geometric axis of its shaft 24 is thus maximum, the head being in the low active position, compressing the spring 14.

Then, the cam 23 continues its rotation so that its eccentricity E decreases, which causes the head 8 to return to its inactive position high, under the action of the spring 14 which relaxes (Figures 14 and 15). The profile 23A of cam 2 leaves the caster of the implantation head which is then in the high vertical position, and the motor 6 of the shaft 5 is pressed again, in the opposite direction to the previous one, to bring back the two units 2 and 3 in the position illustrated in FIGS. 1 to 3 and, thus, complete the operating cycle of system 1.

• coupe parfaite des tronçons car la séparation par un pliage progressif au niveau de la zone frangible ne fait pas agir de forces transversales et n'entraíne donc pas de formation de bavures;
• pas d'obligation d'indexer avec une grande précision le centre des zones frangibles, dans l'axe de rotation pour obtenir une séparation des tronçons ; ceux-ci restent libres dans les logements de la tête d'implantation et se positionnent d'eux mêmes, parfaitement dans l'axe de rotation;
• grâce à l'absence de mécanisme spécifique de coupe, il est possible d'alimenter des tronçons disposés à une distance très faible les uns des autres, et rien ne s'oppose à implanter plusieurs tronçons simultanément, pouvant avoir des longueurs et des sections différentes, ce qui est très utile dans le cas de connecteurs à sorties coudées;
• l'ensemble de ces critères réunis permet d'obtenir des cadences supérieures à celles obtenues par le système antérieur précité, tout en améliorant la qualité des extrémités de broches;
• l'absence d'élément de coupe dans le système présente encore d'autres avantages, tels que:
  • absence des résidus de coupe,
  • réduction de la maintenance du fait de l'absence de poinçons à changer,
  • absence de percussion sur le tronçon au moment de la coupe, ce qui implique que le mécanisme est parfaitement silencieux.

The advantages of the system according to the invention can be summarized as follows:

• perfect cutting of the sections because the separation by a progressive folding at the level of the frangible zone does not make act of transverse forces and thus does not involve formation of burrs;
• no obligation to index with great precision the center of the frangible zones, in the axis of rotation to obtain a separation of the sections; these remain free in the housings of the implantation head and position themselves, perfectly in the axis of rotation;
• thanks to the absence of a specific cutting mechanism, it is possible to feed sections arranged at a very short distance from each other, and there is nothing to prevent the establishment of several sections simultaneously, which may have different lengths and sections , which is very useful in the case of connectors with angled outlets;
• all of these criteria combined make it possible to obtain rates higher than those obtained by the aforementioned prior system, while improving the quality of the ends of the pins;
• the absence of a cutting element in the system has other advantages, such as:
  • absence of cutting residues,
  • reduced maintenance due to the absence of punches to be changed,
  • absence of percussion on the section at the time of cutting, which implies that the mechanism is perfectly silent.

Claims (14)

System for implanting, in a device such as in particular a connector, pins formed by sections of a continuous wire and separable at the level of frangible zones connecting them one after the other,
characterized: in that it includes: a step-by-step advance and guide unit (2) for said continuous wire, and an implantation unit (3) of said sections of wire in said device; and in that said units (2, 3) are mounted movable relative to each other, so that they can, from a first loading position in which the end section of said continuous wire ( F) is introduced into said implantation unit by said advance and guide unit, move relative to one another by separating, by rupture of the corresponding frangible zone (Z), said end section (BE) from the rest of the wire (F), to a second implantation position in which said end section (BE) of said wire, separated from the rest of said wire, is capable of being implanted in said device, and vice versa . System according to claim 1,
characterized in that, in said first position, the two units (2, 3) are aligned so that said end section introduced into the implantation unit (3) and said rest of the wire guided in the unit d 'advance (2) have a rectilinear configuration defining the direction of advance (A) of said wire, and that, in said second position, as a result of a relative movement between said units having resulted in the rupture of the corresponding frangible zone (Z ), said implantation unit (3) is arranged transversely to said advance unit (2), to allow implantation of said end section in said device. System according to claim 2,
characterized in that said relative movement between said units (2, 3) consists of a rotation of the implantation unit (3) about an axis perpendicular to the direction of advance of said wire, to bring it from the first position aligned with the feed unit, at the second position, perpendicular to the previous one. System according to one of the preceding claims 1 to 3,
characterized in that the two units (2, 3) are carried by a frame (4), said implantation unit (3) being mounted on a rotary shaft (5) linked to said frame and perpendicular to the direction of advance of said wire (F), so as to allow, under the action of drive means (6), the passage of said implantation unit from the first position to the second position and vice versa. System according to one of claims 2 to 4,
characterized in that the two units (2, 3) are connected to each other so that, during the transition from the first position to the second position, the advance unit (2) follows the unit implantation (3) to allow a gentle rupture of said frangible zone (Z) between said corresponding sections. System according to claim 5,
characterized in that said connection between the two units (2, 3) is defined by a hinge pin (19) parallel to said rotary shaft (5) and located opposite said frangible zone (Z) between said end section , housed in the implantation unit, and said remainder of the continuous wire, received in the advance unit, and in that said advance and guide unit (2) is pivotally mounted about an axis of pivot (20), parallel to said articulation axis (19) and carried by a slide (21) which can slide along said frame, perpendicular to said pivot and articulation axes. System according to claim 6,
characterized in that said pivot axis (20) is located at the rear of said advance and guide unit (2), opposite said articulation axis (19) of the units, located at the front of said advance unit. System according to any one of Claims 1 to 7,
characterized in that said advance and guide unit (2) comprises at least one longitudinal guide channel (16) receiving said wire and a controllable advance mechanism (17) cooperating with the latter to ensure step-by-step advance not of said continuous wire. System according to one of Claims 3 to 8,
characterized in that said implantation unit (3) comprises a support (7) associated with said rotary shaft (5) and an implantation head (8) slidably mounted on said support and provided, at its turned end towards said advance unit in the first position, from at least one housing (10) in which said end section (BE) of the wire can be received. System according to claim 9,
characterized in that it comprises means (12) for controlling the sliding of said implantation head (8) to ensure the introduction of said end section (BE) into said device when said implantation unit (3) occupies the second position. System according to claim 10,
characterized in that said control means (12) comprise a cam (23) rotated and linked, by a synchronization mechanism (25), to the rotary shaft (5) carrying said implantation unit, so that , when the latter occupies said second position, the action of the cam (23) causes said head to slide in the direction of said device for implanting said section. System according to one of claims 9 to 11,
characterized in that holding means (13) ensure the locking in position of said end section in said housing (10) of said implantation head (8). System according to claim 12,
characterized in that said holding means (13) are of the suction type and comprise a fluid supply source cooperating with said housing (10) by a conduit (8C) formed in said implantation head (8). System according to any one of Claims 9 to 13,
characterized in that an elastic return element (14) is provided between said support (7) and said head (8) of the implantation unit (3) to return said head to the inactive position after implantation of said section.

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