FR2703078A1 - Wiring machine and method of threading wire into a mechanism for regulating and balancing the voltage of a wiring pin. - Google Patents

Abstract

A wiring machine comprising a plurality of wiring pins, intended to produce a twist of wiring, from an internal wire and an external wire (1, 1 '), passing, before their point of junction or twisting, on a tension regulating or balancing mechanism (30) having two or more pairs of rollers (38, 40), arranged side by side with parallel axes, the mechanism being capable of rotating about a perpendicular axis to the axes of the rollers, is characterized in that for each of the two threads (1, 1 ') there is provided a continuous thread channel (41) partially delimited by the rolling surfaces of each roller of the individual pair of rollers (38 , 40).

Description

Cabling machine and method of threading Qe of wire into a regulation mechanism and

  for balancing the voltage of a wiring spindle The wiring devices resemble in their structures a double twist twisting device, the constructions of the spindles being in particular slightly

almost identical.

  During the operation of a wiring spindle, an internal wire is drawn from a storage coil which is housed, fixed in rotation, in a bobbin pot This internal wire is drawn axially upwards from the storage coil and passes, on its course going to the point of reunification with the external wire, on an internal wire brake This external wire is drawn from a storage reel threaded on a reel rack and, after having passed on an external wire brake, is introduced from below axially into the spindle rotor from where it extends, forming a ball of wire to wrap around the internal wire, in the direction of the junction point with the latter. In order to obtain a regularly twisted yarn, the tensions of the two components of the yarn (external yarn and internal yarn) must be determined precisely with respect to each other. The two yarns therefore pass through a mechanism of tension regulation and / or balancing, also called rope regulator, whose role consists in bringing the two components of the yarn to the junction point,

  subjecting them to as much thread tension as possible.

  This applies not only to the speed of rotation in operation of the wiring spindle but also during the start and stop phase. The fact of having different constraints in the wires is the cause of obtaining a yarn or of a rope having different individual wire lengths, which results in a reduction of the maximum tensile strength and the

  resistance to fatigue of the twisted yarn.

  The same considerations apply analogously also for a wiring process in which the junction point between internal wire and external wire is located below

of the wiring pin.

  Wiring pins equipped with voltage regulation or balancing mechanisms are known for example from DE-PS 24 63 074,

  EP-B O 313 877, EP-A O 348 307 and FR-A 26 67 879.

  Balancing devices of the type described are mainly driven by rotating balloon wires (external wire). However, embodiments with external drive are also known, including the forced drive.

  can be switched on and off (see EP-B 313 877).

  In known tension regulation or balancing mechanisms, the pairs of rollers arranged with parallel axes next to each other are generally mounted idly. This has the disadvantage that the wires can jump from the rollers during the phase. starting and stopping or when stopping the spindle Correct running of the wire can only be monitored at the cost of a considerable expense Another disadvantage, when you have a crazy journaling, is the increased bearing load The main difficulties and drawbacks lie in the manual process of threading the two components of filament or wire

  around the rollers of the tension balancing mechanism.

  The object of the invention is to create a device and a method for simplifying the threading of the two components of the wire.

  in the tension balancing mechanism.

  To solve this problem, the stranding machine according to the invention, comprising a plurality of wiring pins, intended to produce a plied yarn, from an internal thread and an external thread, passing, before their junction point, or of twisting, on a tension regulation or balancing mechanism having two or more pairs of rollers arranged one beside the other with parallel axes, the mechanism being capable of rotating around an axis perpendicular to the axes of the rollers is characterized in that, for each of the two wires, a continuous wire channel is provided, partially delimited by the rolling surfaces of each roller of the individual pair of rollers As a result of the channeled guides of the wires through the continuous wire channels , the thread is prevented from taking a bad entwining path around the tension balancing rollers, while ensuring that the thread does not take up a position next to the Rolling surface already described of the balancing roller This channeled guide of the wires is advantageous both as regards the passage of the wire by means of a metallic thread for threading and also

  for the passage of the wire which ensured pneumatically.

  According to another aspect of the invention, there is associated with each wire channel a hole intended to introduce compressed air, which is introduced into the wire channel so that, on the one hand, it is produced, at the way of an injector, a flow of suction air and then, on the other hand, there is produced a flow of compressed air intended for

  introduce, or pass, the wire.

  According to another preferred embodiment of the invention, the outputs of the two channels can be connected to a common wire feed channel, to which is connected a source of vacuum for the threading and joint and simultaneous passages of the two wires to through the voltage regulation and balancing mechanism, for example, a compressed air supply channel leading to the

  way of an injector in the common wire guide channel.

  The method according to the invention for threading external and internal yarns to be twisted to obtain a cabled yarn, in a tension regulation and balancing mechanism comprising at least two pairs of rollers arranged with parallel axes, mechanism mounted upstream of the junction point of the two wires of a wiring pin, is characterized by the fact that the two wires are passed, preferably pneumatically, through continuous channels for threading wires, partially delimited by the rolling surfaces of each roller of different

pairs of rollers.

  The invention is explained below in more detail at

using the drawing.

  Figure 1 shows in schematic representation a side view of a wiring pin with a known "open" voltage regulation or balancing mechanism; FIG. 2 schematically represents the paths o LO pass the external wire and the internal wire through the tension balancing mechanism, shortly before the junction or twisting point of the two wires; Figure 3 partially shows in section line section III-III of Figure 3 a side view of the voltage regulation or balancing mechanism, according to the invention, of a wiring pin; Figure 4 shows a sectional view along line O IV-IV of Figure 3; FIG. 5 partially shows in section a perspective view of the tension balancing mechanism used according to the invention in another mode of representation than in FIG. 3; FIG. 6 schematically represents the threading process, actuated by compressed air through the tension balancing mechanism used according to the invention; FIG. 7 partially shows in section a variant 0 embodiment of the tension balancing mechanism configured according to the invention for the joint and simultaneous passage of the two wires in the tension balancing mechanism; Figure 8 partially shows in section an embodiment with a tension balancing mechanism swiveling on the cover of the pot.

protection of the coil container.

  i FIG. 1 shows in diagrammatic representation a known wiring spindle swiveling on a wiring bench The wiring spindle comprises, as part of the spindle rotor, a spindle nut 4, driven in particular by means of a drive belt tangential, with a turntable 5 fixed on it and a wire storage disc 6 whose radially extending wire guide channel is indicated schematically by the radial section of the external wire 1, 1 'pulled from a rack

  with coils 2 and passing through an external wire brake 3.

  On the usual hollow axis of the wiring spindle is mounted for rotation a protective head 7 fixed stationarily, for an internal wire pre-storage coil 8 also mounted stationary A cover in protective pot 9 fixed on the upper face of the pot coil 7 and can be opened is used to fix an internal wire brake 10 for the internal wire 11 pulled upwards from the internal wire pre-storage coil 8 The two wires, namely the internal wire 11 and the external wire 1, 1 ′ pass before their junction point 15 in a tension regulation or balancing mechanism 12, also called "rope regulator", comprising two pairs of rollers 13 and 14 respectively arranged one at a time side of the other with parallel axes and, in the operating state of the wiring pin, rotating in the direction of the arrow fl The tension balancing mechanism 12 comprising the pairs of rollers 13 and 14 is rotatably mounted f for this purpose by means of a hollow shaft 25 in a bearing block 16 fixed on a support 17 mounted adjustable on the frame

  machine in the direction of the double arrow f 2.

  The tension balancing mechanism 12 is either driven by being controlled from the outside, or driven is carried out by means of the balloon wire 1 'rotating around the coil pot 7 and passing for this purpose through a guide eyelet 19 of a shell fixed on the underside of the tension balancing mechanism 12 and provided with a

  central passage opening 18 for the internal wire 11.

  The internal wire 11 drawn from the internal wire pre-storage spool 8 first circles a first roller of the pair of rollers 13 then the opposite roller of the second pair of rollers, 14, before being brought further

at junction 15.

  The outer thread 1 of the outer thread pre-storage spool 2 entwines, after passing the thread balloon 1 'behind the thread guide eyelet 19, first the second roll of the pair of rollers 14 and then , the second opposite roll of the pair of rollers 13, before being wound as a winding wire around the internal wire 11 The two wires 11 and 1 are pulled behind the junction or twisting point 15 upwards at through the hollow shaft 25 as cabled wire 21 and brought in the usual way to a

winding mechanism.

  FIG. 2 schematically illustrates the path traveled by the two wires II and 1 around the individual rollers each associated with the two individual wires of the

pair of rollers 13 and 14.

  While in the known wiring pins or the known wiring method the two individual wires are each passed through an "open" voltage regulation or balancing mechanism, according to the invention there is provided a regulation or balancing mechanism for "closed" tension as shown in a first embodiment in FIGS. 3 to 6 This tension balancing mechanism 30 is composed of a casing block 31 composed of several individual parts 60, 61, and 62 that are substantially discordant, block in which revolve two pairs of rollers 32 and 33 arranged one beside the other with parallel axes Each pair of rollers comprises an axis respectively 35 and 36 mounted for rotation in the casing block 31 by means of bearings 34 On each axis 35, 36 are fixed two rollers, respectively 37, 38 and 39, 30 so that the two rollers 37, 39, on the one hand, and the rollers 38, 40, on the other hand, are respective The opposite block aligned The multi-part casing block 31 is provided with a wire channel 41 opening out laterally, intended for the external wires 1, 1 ′, and a wire channel 32 opening centrally from below, for the internal wire 11 The two wire channels 41 and 42 correspond to the wire path shown in FIG. 2 for the two individual wires 1 and 11, oriented so that they are partially bounded by the surfaces

  bearing of individual rollers and directed by their-

  channel outlets, opening at the top out of the casing block 31, in the direction of the junction or twisting point of the two individual wires 1, 1 'and 11 respectively. To ensure reliable passage of the wires in the balancing mechanism of tension, according to the invention, the spacings between the wire rollers 37, 38 and 39, 40 respectively and the wall sections, placed opposite the thread running paths, the wire channels 41 and 42

  are sized as small as possible.

  In a first wire channel 41 opens, preferably tangentially in the region of the individual roller 38, a passage of compressed air 43 while, in the other wire channel 42, 42 'opens, in the region of a roller individual 39, preferably also tangentially, another compressed air passage 44 The two compressed air holes 43, 44 have mouthpieces 43 'and 44' respectively, for applying a compressed air gun 55 (FIG. 6 ) The compressed air passages 43 and 44 open into the specific wire channel so that a pressure suction flow is produced in order to pass a wire 1 or 11 in a first section of lower channel of this wire channel, like an injector, and then, a flow of compressed air is produced in a second section of upper channel, as is also visible in Figure 6 using the arrows f 3 (suction air flow) e t f 4 (compressed air flow). By blowing compressed air into the compressed air bore 43, it is thus possible to produce in the wire channel 41, 411 a flow of transport air to drive the wires 1 held on the inlet of the wire channel 41 to the evacuation 41 'of this wire channel The same goes for the passage of the

internal wire 11.

  When the spindle turns and the yarn ball thus oscillates around the spindle axis as a result of the lateral entry of the yarn 1, the casing block 31 mounted in an appropriate rotation is driven in rotation as is

  indicated analogously to Figure 1 by the arrow fl.

  The rotary assembly of the casing block 31 shown in FIGS. 3 to 6 can be carried out in a manner corresponding to FIG. 7 showing an alternative embodiment of a tension balancing mechanism 50, by means of a block

  bearing 51 fixed appropriately on the machine frame.

  The embodiment shown in FIG. 7 of a tension balancing mechanism 50 corresponding, from the point of view of the wire channels 41, 42 and the pairs of rollers respectively 37, 38 and 39, 40, to the form of embodiment according to FIGS. 3 and 6, however with the exception that, in the two continuous wire channels, no drilling of compressed air emerges. In the embodiment of FIG. 7, the outputs of the two wire channels are connected to a common wire guide channel 52 to which a vacuum source is connected in order to thread and pass the two wires through the tension regulation and balancing mechanism 50 This vacuum source can for example be a bore with compressed air 53 associated with the common wire guide channel 52 and working in the manner of an injector, hole to which a source of compressed air 54 can be connected The hole of compressed air 53 preferably opens out, also like the end upper of the wire guide channel 52, in a cap placed for example on the bearing block 51, so that a stream of compressed air, directed towards the junction or twisting point 15 (see Figure 1) so that a suction air stream can be produced in the direction of the voltage balancing mechanism 50 and that then a compressed air stream can be produced towards the point of

twisting 15.

  In the embodiment according to FIG. 8, the tension balancing mechanism 65 which, as regards its principle construction and its operation, corresponds to the tension balancing mechanism 30 of FIGS. 3 to 6, is mounted rotating on the upper face of the cover in protective pot 9, by means of a bearing bush 66 A wire tube 67, intended for the internal wire 11 and connected to the wire channel 42 of the tension balancing mechanism, is guided by its

  upper end through the bearing sleeve 66.

Claims (5)

  1 Cabling machine, comprising a plurality of cabling pins, for producing a cabling twist, from an internal wire and an external wire, passing, before their junction point, or twisting on a regulating or d '' tension balancing having two or more pairs of rollers, arranged one beside the other with parallel axes, this mechanism being mounted rotating about an axis perpendicular to the axes of the rollers, characterized in that, for each of the two wires (1; 11), a continuous wire channel (41; 41 '; 42, 42') is provided, partially delimited by the rolling surfaces of each roller (38, 40; 37, 39)   of the individual pair of rollers.   2 Cable-laying machine according to claim 1, characterized in that the pairs of rollers (37, 38; 39, 40) are mounted on a common housing block (31), through which the   wire channels (41, 41 '; 42, 42').   3 Cable-laying machine according to claim 1, characterized in that, in each wire channel (41, 41 '), there opens a compressed air passage (43; 44) intended to introduce compressed air. 4 Cable-laying machine according to claim 3, characterized in that the compressed air holes (43, 44) open out substantially tangentially to the running surface of a roller (38; 39) in the respective wire channel (41; 42) ; Cable wrapper according to claim 3 or 4, characterized in that each compressed air hole (33; 34) opens into the respective wire channel (41; 42) so that there is produced, for threading and passage of a wire in a first section of this wire channel, a flow of suction air in the manner of an injector and, as a result, in a second section of this wire channel, an air flow compressed.   6 Cable-laying machine according to claim 1, characterized in that the outputs (41 ', 421) of the two wire channels (41, 42) are connected to a common wire guide channel (52), to which a source can be connected vacuum for threading and passage of the two threads through the mechanism   regulating and balancing the voltage (50).   7 Cable-laying machine according to claim 6, characterized in that a compressed air passage (53), operating in the manner of an injector, is associated with the common wire guide channel (52). 8 A method of threading external and internal twisting yarns to produce a plied yarn in a tension regulation and balancing mechanism having at least two pairs of rollers arranged side by side with their parallel axes, a mechanism which is mounted upstream of the junction point of the two wires of a wiring pin, characterized in that the two wires are passed, preferably pneumatically, through continuous threading channels, partially delimited by the rolling surfaces of each roller belonging to different pairs of rollers.