JPH0773011B2 - SZ twisting machine for communication cable - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an SZ twist gathering machine for producing a communication cable in which a gathering wire composed of a plurality of quad core wires is inverted and twisted into three or more layers.

(Prior Art) As a communication cable, for example, there is one as shown in FIG. That is, the communication cable 51 shown in FIG.
52 and an exterior 53 made of tape or the like covering these gathering lines 52. The gathering lines 52 are a central layer 54 consisting of two gathering lines 52 and an intermediate layer consisting of six gathering lines 52. 55
And an outer layer 56 composed of 12 assembly lines 52. The aggregated line 52 of each layer 54, 55, 56 is twisted in a reverse twist, that is, an SZ twist in which the twist direction is reversed at a predetermined pitch, and the twist direction of the intermediate layer 55 is the twist direction of the center layer 54 and the outer layer 56. The opposite.

As shown in FIG. 5, the assembly line 52 includes five quad core wires 57,
It is configured by a coarse winding 58 made of a tape or the like that covers the quad core wire 57, and the entire assembly line 52 is alternately twisted in a reverse direction at a predetermined pitch.

The quad core wire 57, as shown in FIG. 6, has an insulating core material 59,
The core material 59 is composed of four core wires 60 made of conductors arranged at intervals on the outer periphery of the core material 59, and made of, for example, a foamed resin or the like for covering the core material 59 and the core wire 60 and insulating the core wires 60 from each other. It is composed of a protective body 61 and a thin skin layer 62 covering the protective body 61. The protective body 61 can be made of various materials other than the foamed resin, and the thin skin layer 62 may not be provided.

That is, the quad core wire 57 includes four core wires 60, the assembly wire 52 includes 20 core wires 60, and the communication cable 51 includes the core wires 60.
Contains 400 60s.

As a device for manufacturing such a communication cable 51, 100
A cable supply for supplying two quad core wires 57, and five quad core wires 57 supplied by this cable supply are assembled into five assembly wires 52 to obtain 20 assembly wires 52 and a subunit assembly for twisting each assembly wire 52. The device and 20 assembly lines 52 supplied by this subunit assembly device are assembled into three layers of a central layer 54, an intermediate layer 55, and an outer layer 56, and the twisting direction of each layer 54, 55, 56 is between adjacent layers. For a tandem type communication cable having a unit collecting device equipped with a reversing head for reversing twisting (SZ twisting) in opposite directions
There was an SZ twisting machine.

(Problems to be Solved by the Invention) In the conventional SZ twist gathering machine for communication cables, the quad core wire is used.
Since the tension of 57 or the assembly line 52 is controlled only by the brake of the cable supply, the rotation of the reversing head causes tension fluctuations in the assembly line 52 and the quad core wire 57. The dancer roll urged the assembly line 52 to absorb the tension fluctuation. However, in the case of simultaneous twisting of three layers, the fluctuation of the tension of the gathering wire 52 constituting the outer layer 56 is large and the vibration of the gathering wire 52 is violent, so if the tension is not increased, the wire breakage occurs in the cable supply. In order to solve this, when the tension of the assembly wire 52 forming the outer layer 56 is increased, the assembly wire 52 twisted by the reversing head rotates in the direction opposite to the twisting direction on the downstream side of the reversing head and the twisting amount becomes small. In order to solve this, if the pressing force of the untwisting prevention belt located on the downstream side of the reversing head is increased, the communication cable 51 without the outer sheath 53 is damaged, and the assembly line forming the outer layer 56. 52 is damaged.

Also, without using the tandem system, a process of manufacturing the assembly line 52 from the quad core wire 57 by the subunit assembly device,
A method of separately and independently performing the step of manufacturing the communication cable 51 from the assembly line 52 by the unit assembly device is also adopted, but this is very inefficient in production.

(Means for Solving the Problem) The present invention relates to a cable supply 1 for supplying a plurality of quad core wires 57 having a plurality of cores, and a plurality of quad core wires 57 supplied by the cable supply 1 for a predetermined number of plurality. A unit assembly device 15 for obtaining a plurality of assembly lines 52 and a plurality of assembly lines 52 supplied by the unit assembly device 15 are assembled into three or more layers, and the twist directions of the layers are opposite to each other between adjacent layers. In the tandem type SZ twist gathering machine for communication cables, which has a unit gathering device 16 having a reversing head 6 having a reverse twisting prevention presser belt 7 and an exiting twist back prevention holding belt 7 at the outlet, A guide for guiding the torsion catcher 4 and the plural gathering lines 52 from the torsion catcher 4 for individually inverting and twisting each gathering line 52 between the unit gathering device 16. A plurality of auxiliary take-up devices 18 that individually take the plurality of assembly lines 52 from the torsion catcher 4 are arranged between the auxiliary rolls 18 and the guide rolls 5. A plurality of tension detection devices 19 for individually detecting the tensions of the plurality of assembly lines 52 taken by the auxiliary take-up device 18.
The auxiliary take-up device 18 is connected to the DC motor 20 and this DC
The reduction gear 21 connected to the output shaft of the motor 20 and this reduction gear
Driven by power transmission mechanism 22 by 21 output shafts 1
It is composed of a pair of caterpillars 23, and is an object to pick up by sandwiching the assembly line 52 by a pair of caterpillars 23,
The tension detecting device 19 is composed of a dancer roll 24 that is pressed by a spring to bias the assembly line 52, and an angle detector 25 that detects the displacement of the dancer roll 24. The detection output of the angle detector 25. Is supplied to the DC motor 20 via the amplifier 26, and each auxiliary pulling device 18 is individually controlled by a signal from each tension detecting device 19 to maintain the tension of each assembly line 52 at a predetermined value. Characteristic communication cable SZ
It is a twist gathering machine.

(Operation) Between the sub-unit collecting device and the unit collecting device, the tension detecting device individually detects the tension of the collecting line, and the auxiliary take-up device is individually controlled by the detection signal, and the take-up speed by the auxiliary take-up device. Are precisely adjusted so that the tensions of the assembly lines are individually kept at predetermined small values.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a schematic overall configuration diagram of an SZ twisting machine for communication cables according to an embodiment of the present invention, where 1 is a plurality (10 in this embodiment).
0) quad core wires 57 are supplied to the cable supply, and a guide roll 2 for individually guiding the plurality of quad core wires 57 supplied from the cable supply 1 is arranged on the rear side of the cable supply 1. . A plurality of quad core wires 57 guided by the guide roll 2 (five in this embodiment) are bundled and bundled on the rear side of the guide roll 2 (20 in this embodiment).
The gathering machine 3 for obtaining the gathering line 52 of the present book is arranged, and the torsion catcher 4 for individually inverting and twisting the gathering line 52 is arranged on the rear side of the gathering machine 3. A guide roll 5 that guides a plurality of assembly lines 52 from the torsion catcher 4 is arranged on the rear side of the torsion catcher 4, and a plurality of guide rolls guided by the guide roll 5 are arranged on the rear side of the guide roll 5. A reversing head 6 is provided which collects the collecting wires 52 of three layers into three layers and reverses and twists the layers so that the twisting directions of the layers are opposite to each other. On the rear side of the reversing head 6, a reversal anti-twisting prevention presser belt 7 is arranged which presses the plurality of gathered wires 52 reversed and twisted by the reversing head 6 to prevent untwisting. At the rear side of the belt 7, there is arranged a press-winding binder 8 that binds together a plurality of gathering wires 52 that are pressed by the reverse twist-back prevention presser belt 7. An embossing tape supplying device 9 for winding the embossing tape around the surface of the plurality of assembly lines 52 bound by the pressing winding binder 8 is arranged on the rear side of the pressing winding binder 8. At the rear side of the device 9, a mylar tape supply device 10 for further winding a mylar tape around the plurality of assembly lines 52 around which the emboss tape is wound by the emboss tape supply device 9 is arranged. On the rear side of the mylar tape supply device 10, a longitudinal binder 11 for adhering a tape or the like along the longitudinal direction to a plurality of assembly lines 52 wound by the mylar tape supply device 10 is arranged. There is. A take-up device 12 for taking up the communication cable 51 obtained by the process up to the longitudinal binder 11 is arranged on the rear side of the vertical binder 11, and a take-up device 12 is provided on the rear side of the take-up device 12. A winding device 13 for winding the communication cable 51 taken up by is arranged.

The assembly machine 3 and the torsion catcher 4 are subunit assembly devices 15 for obtaining a assembly line 52 from a plurality of quad core wires 57.
The reversing head 6, the reversing anti-twisting prevention presser belt 7, the presser winding binder 8, the embossing tape supplying device 9, the mylar tape supplying device 10 and the longitudinal binder 11 are connected from a plurality of assembly lines 52 to a communication cable. The unit assembling device 16 for obtaining 51 is configured. Between the sub-unit collecting device 15 and the unit collecting device 16, that is, between the torsion catcher 4 and the guide roll 5, a plurality of auxiliary pulling attachments for individually pulling the plurality of collecting lines 52 from the torsion catcher 4 are provided. The device 18 is arranged, and between the auxiliary take-up device 18 and the guide roll 5, there are provided a plurality of tension detecting devices 19 for individually detecting the tensions of the plurality of assembly lines 52 taken by the auxiliary take-up device 18. It is arranged. As shown in FIG. 2, the auxiliary take-up device 18 includes a DC motor 20, a speed reducer 21 connected to an output shaft of the DC motor 20, and an output shaft of the speed reducer 21 via a power transmission mechanism 22. It is composed of a pair of driven caterpillars 23, and the pair of caterpillars 23 sandwich and collect the assembly line 52. Tension detector
Reference numeral 19 is composed of a dancer roll 24 which is pressed by a spring (not shown) to bias the assembly line 52, and an angle detector 25 which detects the displacement of the dancer roll 24.
The detection output of 25 is supplied to the DC motor 20 via the amplifier 26.

As shown in FIG. 3, the reversing head 6 has a cylindrical outer cylinder 28, an intermediate cylinder 29, and an inner cylinder 30 which are concentric with each other.
The outer cylinder 28 has a pair of bearings 32 by a pair of annular support plates 31.
It is rotatably supported around the shaft center via. The intermediate tubular body 29 is supported by the outer tubular body 28 via a pair of bearings 33 so as to be rotatable around its axis, and the inner tubular body 30 is supported by the intermediate tubular body 29.
Are rotatably supported around the shaft center by a pair of bearings 34. On the outer periphery of the outer cylinder 28 and the intermediate cylinder 29,
A large number of ring bodies 35 each made of a resin or the like having excellent lubricity are loosely fitted, and a support plate 31 that supports one end side of the outer cylindrical body 28.
A plurality of nozzles 36 (12 nozzles in this embodiment) are fixed in a penetrating manner. Between the outer circumference of the other end of the outer tubular body 28 and the other bearing 32, a plurality of (12 in this embodiment) through holes (not shown) are formed in an annular shape at equal intervals in the circumferential direction. The die 37 is fitted and fixed. A bearing 38 is fitted and fixed to the outer periphery of one end of the intermediate tubular body 29, and an annular plate 39 is fitted and fixed between the bearing 38 and one bearing 33. Nozzles 40 (six in this embodiment) are fixed in a penetrating state at equal intervals in the circumferential direction. These nozzles 40 are connected to the nozzles 36 by connecting rods 41, and a plurality of (six in this embodiment) through-holes (6 in this embodiment) are provided between the outer periphery of the other end of the intermediate tubular body 29 and the other bearing 33. Annular dies (not shown) formed at equal intervals in the circumferential direction are fitted and fixed. A plurality of (2 in this embodiment)
Dies 43 each having through holes (not shown) are fixed. A pulley 44 is provided on the outer periphery of one end of the outer cylinder 28.
Is fitted and fixed, and the pulley 45 is attached to the outer periphery of one end of the intermediate cylinder 29.
Is fitted and fixed, and the pulley 46 is
Are fitted and fixed, and these pulleys 44, 45, and 46 are connected to a driving device via a belt (not shown) and individually driven.

Next, the operation will be described. The 100 quad core wires 57 drawn out from the cable supply 1 are guided by the guide roll 2 and supplied to the collecting machine 3, and are bundled together in groups of 5. The 20 gathered wires 52 thus obtained are individually twisted and reversed by the torsion catcher 4, guided by the guide rolls 5 and supplied to the reversing head 6. At this time, at the position between the torsion catcher 4 and the guide roll 5, the tension of each assembly line 52 is individually detected by the tension detecting device 19. That is, when the tension of the gathering line 52 changes, the slack of the gathering line 52 changes accordingly, which changes the load of the dancer roll 24 and
24 rotates about the angle detector 25 and stops at a position balanced with the urging force of a spring (not shown). This dancer roll 24
Since the rotation angle of (1) corresponds to the change in the tension of the assembly line 52, the detection output of the angle detector 25 corresponds to the tension of the assembly line 52. The detection output of the angle detector 25 is amplified by the amplifier 26 and supplied to the DC motor 20 as drive power. As a result, the DC motor 20 is driven, and its power is transmitted to the caterpillar 23 via the speed reducer 21 and the power transmission mechanism 22, and the assembly lines 52 are individually taken by the pair of caterpillars 23. Therefore, as the tension of the gathering line 52 increases, the slack of the gathering line 52 decreases and the dancer roll 24
2 rotates clockwise in FIG. 2, the detection output of the angle detector 25 increases, the drive power supplied to the DC motor 20 increases, and the take-up speed of the assembly line 52 by the caterpillar 23 increases. It becomes faster and the tension of the assembly line 52 becomes smaller. Thus, the auxiliary take-up device 18 and the tension detecting device 19
Thus, the tension of the assembly line 52 is automatically adjusted so as to always maintain a predetermined small value. The tension of the gathering line 52 may be set so that all the 20 gathering lines 52 are adjusted to the same tension, or the layers 54,5 of the communication cable 51 may be adjusted.
It may be set so that tensions different from each other may be set for each of the gathering lines 52 forming the 5, 56, and can be set arbitrarily.

Of the 20 assembly lines 52 supplied to the reversing head 6, 12 of them are individually guided to the outer peripheral side of the outer cylindrical body 28 through the nozzle 36, and individually through the through holes of the die 37. 6
To the other end side of. Further, the six assembly lines 52 are individually guided through the nozzles 40 to the tubular space between the outer circumference of the intermediate tubular body 29 and the inner circumference of the outer tubular body 28, and individually pass through the through holes of the die 42. And is pulled out to the other end side of the reversing head 6. Further, the two assembly lines 52 are individually guided through the through holes of one die 43 into the inside of the inner cylindrical body 30, and individually through the through holes of the other die 43, and the other end side of the reversing head 6 is provided. Be withdrawn. Each of the cylinders 28, 29, 30 is rotated about the axis by a driving device (not shown), and the rotation directions of the outer cylinder 28 and the inner cylinder 30 are the same, and only the intermediate cylinder 29 is rotated. Is the opposite direction, and the turning direction is reversed at every predetermined take-up pitch, so that the assembly line 52 is reversed at the same time in three layers by the dies 37, 42, 43 that rotate integrally with the tubular bodies 28, 29, 30. Twisted or SZ twisted. At this time, the assembly line 52 of each layer 54, 55, 56 is partitioned from each other by the cylinders 28, 29, 30, and the outer cylinder 28 and the intermediate cylinder
Since a large number of ring bodies 35 made of resin or the like having excellent lubricity are loosely fitted around the outer circumference of 29, the assembly lines 52 do not get entangled with each other, and three layers of reverse twist can be satisfactorily performed at the same time.

The gathered wire 52 that has been inverted and twisted by the inversion head 6 is pressed by the inversion anti-twisting prevention presser belt 7 in the vicinity of the outlet of the inversion head 6 and is bound by the press winding binder 8 to form an embossed tape. The supply device 9 winds the embossed tape, the mylar tape supply device 10 winds the mylar tape, and the longitudinal binder 11
A tape or the like is attached along the longitudinal direction by the, and is taken up by the draw attaching device 12 and taken up by the take-up device 13.

In this way, the gathering wire 52 is individually drawn by the auxiliary take-up device 18 at a position between the torsion catcher 4 and the guide roll 5, so that the quad core wire in the cable supply 1 is changed by the tension variation of the gathering wire 52 in the reversing head 6. The cable of 57 does not come off, and the tension of the gathering line 52 is individually detected by the tension detecting device 19, and the tension of each gathering line 52 on the downstream side of the auxiliary take-up device 18 is always a predetermined small value. Since it is controlled so that the twisting amount of the gathering wire 52 can be sufficiently secured, and further, the pressing force by the reversal anti-twisting prevention presser belt 7 is small, the gathering wire 52
It is possible to stably manufacture a good quality communication cable without damaging the communication cable. When the quad core wire 57 made of foamed resin is used as the protective body 61,
Since it is soft, when it is manufactured by the conventional apparatus, the damage due to the reversal anti-twisting prevention holding belt 7 is particularly severe, but the apparatus in the present embodiment does not cause any damage.
Further, from the above, even if the pulling speed by the pulling attachment device 12 is increased, there is no inconvenience such as disconnection of the cable and damage to the assembly line 52, and the communication cable 51 of stable and good quality can be manufactured, Productivity can be improved. Further, by using the reversing head 6 as in this embodiment, the central line 54, the outer layer 56, and the assembly line 52 of the intermediate layer 55.
The twisting direction of the cable can be reversed, so that the fluctuation of the outer diameter of the communication cable 51 can be eliminated.

As described above, according to the present invention, the assembly line is individually drawn by the auxiliary take-up device at the position between the subunit assembling device and the unit assembling device, so that the tandem is excellent in productivity. Although it is a system, there is no possibility that the quad core cable will come off in the cable supply due to the tension fluctuation of the assembly line in the reversing head, and the tension of the assembly line is individually detected by the tension detection device, and it is downstream from the auxiliary take-up device. Since the tension of each gathering wire on the side is always controlled to a specified value, the twisting amount of the gathering wire can be sufficiently secured, and since the pressing force by the reverse twist back prevention presser belt is small, The communication cable of good quality can be stably manufactured without causing any damage. When using a quad core wire using a foamed resin as a protector, since the protector is soft, when manufactured by a conventional device, damage to the assembly line by the reversal anti-twisting prevention presser belt was particularly severe, but the device of the present invention caused damage. Does not occur at all. In addition, from the above, even if the take-up speed by the take-off device is increased, it is possible to stably manufacture good quality communication cables without causing inconveniences such as cable disconnection and damage to the assembly line, thus improving productivity. Can be achieved.

At the position between the torsion catcher 4 and the guide roll 5, the collecting wire 52 is individually drawn by the auxiliary take-up device 18, so that the cable disconnection of the quad core wire 57 in the cable supply 1 due to the tension fluctuation of the collecting wire 52 in the reversing head 6 is removed. In addition, the tension of the gathering line 52 is individually detected by the tension detecting device 19, and the tension of each gathering line 52 on the downstream side of the auxiliary take-up device 18 is controlled to always be a predetermined small value. Therefore, a sufficient amount of twisting of the aggregated wire 52 can be secured, and since the pressing force by the reversing anti-twisting prevention presser belt 7 is sufficient, it does not damage the aggregated wire 52 and communication of good quality is achieved. The cable can be manufactured stably. When the quad core wire 57 made of foamed resin is used as the protective body 61, the protective body 61 is soft, and therefore, when it is manufactured by the conventional apparatus, the damage due to the reversal anti-twisting prevention presser belt 7 was particularly severe. The device does not cause any damage. Further, from the above, even if the take-up speed by the take-up device 12 is increased, the communication cable 51 can be stably produced with good quality without causing inconveniences such as cable disconnection and damage to the assembly line 52. It is possible to improve the sex. The auxiliary take-up device 18 and the tension detecting device 19 are simple and inexpensive.

[Brief description of drawings]

FIG. 1 is a schematic overall configuration diagram of an SZ twist gathering machine for communication cables in one embodiment of the present invention, FIG. 2 is a configuration diagram of an auxiliary take-up device and a tension detecting device, and FIG. 3 is a cross-sectional view of a reversing head.
4 is a sectional view of the communication cable, FIG. 5 is a sectional view of the assembly line, and FIG. 6 is a sectional view of the quad core wire. 1 ... Cable supply, 6 ... Inversion head, 15 ... Sub-unit assembly device, 16 ... Unit assembly device, 18 ...
Auxiliary take-up device, 19 ...... Tension detection device, 52 ...... Assembly line, 57
...... Quad core wire

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazumi Ishida 4-3 Ikejiri, Itami City, Hyogo Prefecture Mitsubishi Cable Industries, Ltd. Itami Works (56) Reference JP-A-59-111206 (JP, A) JP 46-28462 (JP, B1)

Claims (1)

[Claims] 1. A cable supply (1) for supplying a plurality of quad core wires (57) having a plurality of cores, and a plurality of quad core wires (57) supplied by the cable supply (1) are assembled by a predetermined number. A subunit assembly device (15) for obtaining a plurality of assembly lines (52) and a plurality of assembly lines (52) supplied by the subunit assembly device (15) are assembled into three or more layers and each layer is twisted. Tandem communication having a unit assembling device (16) equipped with a reversing head (6) having an inversion twisting prevention presser belt (7) and an inversion twisting prevention holding belt (7) at the outlet so that the directions are opposite to each other. In a cable SZ twist gathering machine, a torsion catcher (4) and a torsion catcher for individually reversing and twisting each gathering wire (52) between the subunit gathering device (15) and the unit gathering device (16). Between the guide roll (5) that guides the plurality of assembly lines (52) from the (4),
Multiple assembly lines (5 from the torsion catcher (4)
A plurality of auxiliary take-up devices (18) for individually taking up 2) are arranged, and between the auxiliary take-up devices (18) and the guide rolls (5), the auxiliary take-up devices (18) are taken up. A plurality of tension detection devices (19) for individually detecting the tensions of the plurality of assembly lines (52) are arranged, and the auxiliary take-up device (18) is
A DC motor (20), a speed reducer (21) connected to the output shaft of the DC motor (20), and an output shaft of the speed reducer (21) driven by a power transmission mechanism (22) 1 It is composed of a pair of caterpillars (23), and is an object which sandwiches the assembly line (52) with a pair of caterpillars (23) and pulls it. The tension detecting device (19) is pushed by a spring and assembled. The dancer roll (24) for urging the (52) and the angle detector (25) for detecting the displacement of the dancer roll (24) are constituted by the detection output of the angle detector (25). 26) is supplied to the DC motor (20), and each of the auxiliary take-up devices (18) is individually controlled by a signal from each of the tension detecting devices (19) to set the tension of each assembly line (52) to a predetermined value. SZ for communication cables characterized by being kept at
Twisting machine.