DE2123852B2 - Device for stranding stranding elements for telecommunication cables - Google Patents

Description

³ °

The invention relates to a device for, 35 SZ stranding of stranding elements for telecommunication cables

do a stranding unit with alternating pitch lengths fcei of the cable stranding elements continuously and parallel in the longitudinal axis of the Verse.lvorrichtung and Separated from one another by means of a fixing device tinem rotating Verseiln.ppe ^ And with one that is aligned with the axis of the stranding nipple Take-up drum onto which the cable is attached via a Guide roll wound up in spiral layers

From the German Auslegeschrift 1113 486 it is known, when stranding electrical wires or cores into groups for electrical cables, to first wind up the individual stranding elements parallel to one another and then pull them off in a direction parallel to the coil axis, whereby they are twisted . The twist e follows when unwinding. der Spv'e, ascending \ - ^de . The invention is therefore to show a device for SZ stranding of stranding elements for telecommunication cables, which enables the material to be stranded to be wound up quickly and without problems in spiral layers on the winding drum

will ^ JJ ^ - ^^ 1 ^^^ ^cle ™ f ^c '. ^ ^eiC _{that high} stranding speeds? _ind a quick change cwr direction of rotation of nd J ^{UCN "ns"} ™ ^ ₁ unlaufenden Führungsurn that Aufwickeluom _wjrd

^^ _the device of the input, nd according to the fact that _or . ? _Γ = _Πεη on one to one-sided

° _u ^e _{fwickeltromme} i coaxial, this um- ^^ winding ^ ^^ ^ _that ^

Rotary roller opposite the revolving or still- «" ™ _{Al fwinde} | drum with the same or lower windings, constant or schitdl clwr ^ ^en _{runs as well as with the}

^ S ^ paLrGeKhzahl parallel to the A ™ «J« ^ _{on the one attached to the stranding nipple} . u _Aficke ltrommel a rejection

^ _uMckehmmmd aligned axis, which is separately attached via a shaft

ssssaa: first

a take-up drum with a relatively large capacity use, whereby a very high stranding speed can be achieved. The invention is also applicable to the manufacture of cores for large diameter ferrules, the Cores are all twisted together as they are wound onto the take-up drum will.

Exemplary embodiments of the invention are explained in more detail in the drawings. It shows

1 shows a schematic side view of a distribution device,

F i g. 2 shows a cross section along the line AA ' in FIG. 1 on an enlarged scale,

F i g. 3 is a schematic representation of the FIG. 1 and 2 shown device,

F i g. 4 shows a schematic representation of a somewhat modified stranding device and

5 shows a schematic representation of a further one modified embodiment of a Verseüvorrichtung.

In the F i g. 1 to 3 are denoted with the reference number 1 Veneilelemente such as wires or strands, from which a cable is made. Each of the in the figures! to 3 and 5 shown devices! one Take-off device 6, which the Verseileiementc 1 at constant speed on a Aufwickeltrc mmel 18 winds up or unwinds from this. The drive winch 6 is via a gear 41, 42, <3 (F i g. 3 and 5) connected only to a main drive shaft 12, which is driven by an electric motor 46 with constant speed is driven. The electric one MoU r 46 is connected to shaft 12 via V-belt pulleys 44, 45 around which an endless belt (not shown) runs tied together. Furthermore, a fixing device 7 with guide openings formed therein is provided. the Stranding elements 1 guided through the guide openings of the fixing device 7 reach a distribution nipple 8, which twists the stranding elements together while they run through its openings. Of the Stranding nipple 8 is attached to an endless belt (not shown) by the V-belt pulleys 10, 11 Main drive shaft 12 driven. The speed of the stranding nipple 8 is greater than the speed with which the stranding elements 1 are actually twisted together, so that the wear over the entire Perimeter of the opening formed in the Verrdlnippel 8 is distributed. The opening in the stranding nipple 8 runs diverging outwards with a slight inclination on the drum 18 facing the take-up End, so that the twisted stranding elements 1 cannot detach from each other when they leave the filing nipple 8. The stranded Verseilel ( mei te were often loosened when the widening angle the opening in front of the verse nipple would be pointed.

The stranding elements 1 emerge from the twisting nipple 8 as a semi-stranded stranding unit which is stranded further in order to form, for example, a core for a telecommunication cable. For this purpose a rotary ring 19 is provided, the inside diameter of which is greater than the outside diameter of the flanges of the winding drum 18. The take-up drum 18 is attached to a hollow shaft ti . The rotary ring 19 is mounted concentrically to the winding drum 18 by means of four support rollers 24, 25, 26, 27 which are arranged on: in the bearing block 30 vr.t the same angular distance from one another , 21, 22, 23 which are spaced around the rotating ring in order to feed the stranded stranding elements 1 to the winding drum 18. The diameter of the guide rollers is large enough to prevent the stranded stranding elements from coming loose again by themselves the guide rollers made of plastic, so that no unnecessary centrifugal force is generated.

ίο In Fig. 2 there are four guide rollers 20, 21, 22, 23 on the rotating ring 19, evenly distributed over its circumference, attached. The dashed lines 3. 4, 5 in FIG. 2 represent the stranding elements. If the guide rollers 20, 21, 22, 23 at one after the "Ahwickelprinzip" working device used they can be made smaller and lighter. The rotating ring 19 is then over V-belt pulleys 28. 29 and a finder belt (which runs through dashed lines are indicated by a motor 35 driven, specifically at a coarser speed than the take-up drum 18.

In the case of the F i c. 1 and 2 the winding drum 18 rotates counterclockwise, while the motor 35 the Drehrinc 19 drives clockwise. The take-up drum 18 is on its opposite sides Fenden connected non-rotatably to the hollow shaft 16 by means of an arm 31 and a screw 17. The hollow shaft 16 is cantilevered at one end by a bearing block 32, which in turn on the Machine foundation rests. The hollow shaft 16 is via V-belt pulleys 36, 37 and endless belts (which are indicated with dashed lines) driven by the main drive shaft 12. The speed of rotation the drum shaft 16 is in a predetermined ratio to that by the haul-off device 6 fixed withdrawal speed of the Verscilelemente 1 held, so that a basic lay length for the stranding unit with variable lay length is achieved.

On a shaft 15 which is rotatable in the hollow shaft 16 and also at one end of the bearing block 32 is cantilevered, a deflector plate 13 is attached. The wave 15 of the AbwehteUers 13 is ü <r V-belt pulleys 38, 39 and an end belt (dashed lines) driven by the main drive shaft 12.

When operating the in FIGS. 1, 2 and 3, the rotating ring 19 is in the same Direction driven as the winding drum 18, and the speed of rotation of the rotating ring 19 is compared to that of the take-up drum 18 delayed by a period of time that the cable needs by once to be wound around the take-up drum. The direction of rotation of the deflector plate 13 is also the same like that of the take-up drum 18, but the speed of rotation of the deflector plate is lower than that of the rotating ring 19. A transverse shaft 33 has one end thereof on a reversible one Motor 34 and connected at its other end to the bearing block 30 carrying the rotary ring 19; through this can the bearing block 30 by a distance corresponding to the axial length between the flanges The take-up drum can be moved back and forth so that the cable is evenly positioned on the take-up drum 18 is distributed. The deflector plate 13 has an annular outer edge, the inner diameter of which larger than the outer diameter Ηρς am

front end of the winding drum 18 provided ropes (based on the length of the stranding unit

Flange is and which engages over the drum flange from

so that the stranding unit 2 is not connected to the drum / Vl Nl

the flange can come into contact. _(/ ~~ _n J ^nacn y _n J

When the take-up drum 18 and the deflector 5 ' ²

plate 13 to be released from the shaft 16 is changed.

the bearing block 9 of the stranding nipple 8 so far from the In this case the lay length thus depends on the dei

Winding drum moved away that the winding stranding of the speed of the rotating ring and the dei

tiommel and the Abweisellcr without difficulty by the drive winch determined unwinding

can be removed from the shaft 16. io speed of the stranding elements. The stranding

The extraction device 6 and the bearing blocks 9, 30, that is, is reduced due to the rotational speed

33 are on a common machine foundation between the winding drum and derr

40 stored. Rotating ring wound up.

In the following, the mode of operation of the die shown in FIG. 4 device shown differs

Fig. 1, 2 and 3 illustrated device explained in more detail. 15 differs from the device shown in FIGS

Several Verseilclemente 1 are with constant insofar as the haul-off device 6, the pulling speed of the drive winch 6 through the gear 41, 42, 43 and the motor 35 are missing stationary fixing device 7 and the rotating and the V-belt pulley 29 instead on the dei Stranding nipple 8 is fed to the winding drum 18, the main drive shaft 12 is fixedly arranged. The rotary which is fixed on the shaft 16. The shaft 16 20 ring 19 is therefore in this case in the same as the winding drum 18 is kept at rest, and direction (forwards or backwards) which the winding ring 19 and the guide roller 20 (in the case of the drum 18 are driven, by means of two exemplary embodiments According to Figs. 1, 2, 3 only one V-belt pulley 36, 37 and 28, 29 and by means of a guide pulley are used) are driven by the motor 35 endless belts, whereby a constant speed in the clockwise direction (in Fig. 2). The rotation ratio with respect to the winding drum is maintained ring 19 and the guide roller 20 is turned around. The deflector plate 13 is rotated in the same direction angle, which corresponds to the conveying length of the device and the stranding element 1 essentially at the same speed. The stranding elements 1 driven like the rotating ring; instead, the rotating ring can rotate with a left-hand twist around one of the rotary movement deflector plates at a speed different from the speed of the rotary ring 19 en speaking amount; which he grooves. If the winding diameter, the stranding difference in speed can be greater than unit 2 at the point in time at which it is wound onto the winding drum 18 than the difference in speed of the rotating ring, by d referring to the speed of the winding drum. Since the pressure is applied, the pitch of the stranding unit is nd, the unwinding speed of the stranding elements in Abda the Vc rs purity per revolution of the rotating ring 19 35 depends on the speed at which the cable is twisted all at once. When the diameter of the winding drum is set, the winding drum is d _x and the maximum winding length in this case, the range of change in the lay diameter of the winding drum is greater than that in FIGS. 1 to 3 shown wound stranding unit is _{denoted by d 2} , changes device. When the current winding changes the pitch gradually from π d to π d ₂ . In other words, the number of twists of the cable with d and the speed ratio between the twisting unit changes with the left-hand twist twisting the rotating ring and the winding drum with k , with 40 knives of the wound on the winding drum

1 """1,1," (k N - N) nd = N (k - X) nd u den. 45

η di nd _% (^ a Jj ₆ unwinding speed of the stranding elements

by the difference between the pressure numbers of the

If now the shaft 16 and thus the winding rotating rings and the winding drum are fixed)

drum 18 with constant speed ratio - for the number of strandings of the cable per meter

nis with regard to the fixed 50 and per minute by the drive winch 6: set unwinding speed is driven,

the rotating ring 19 is forced due to the * ^ _ k

Tension of the stranding elements 1 against the rotational N (k - Y) η d (k - Y) nd torque of the motor 35 in the same direction as

to revolve the take-up drum. 55 If the diameter of the winding

speed of the rotating ring 19 is compared to the drum with d ₁ and the maximum winding diameter

Speed of rotation of the winding drum 18 by knife of the cable on the winding drum with d ₂

Delayed a period of time that is necessary to indicate that the unwinding speed changes.

Stranding unit once around the winding drum 18 to the speed of the stranding elements per minute of N (A-1) d _t

wrap. When the speed of the winding drum 18 60 to N {k-Y) d ₁ to N {k-Y) d * and the number

by N (rpm) and the unwinding speed of the turns in the cable per minute changes

the drive winch 6 is expressed by V , of

is the number of turns of the kk

Rotational movement of the winding drum 18 to versei- ft-— Ti ^ T * &<& - ————-.

! end unit, based on the length of the conductor, 65 ^ ) ^πα ι (κ −1) πβ,

N / V (for the right-hand twist twist). Thus, the range of change of the lay length is at

In this way, twisting is obtained as shown in FIG. 4 device shown even larger than

the same length of lay at which the number of times in the FIG. 1 to 3 shown device.

The in F i g. The device shown in FIG. 4 is thus even simpler and more economical than that in FIGS. 1 to 3 device shown. Since, furthermore, in the case of the in FIG. 4 the rotating parts at the same time driven by the common drive shaft, there may be a sudden stop and a rapid one Acceleration of the in F i g. 4 can be performed with greater ease.

In the case of the in FIG. 5, the separate stranding elements 1 are guided from the take-off device 6 at constant speed through the fixing device 7 and the stranding nipple 8, where the stranding elements are stranded together. The stranding elements emerge from the stranding nipple 8 in the form of a stranding unit 2, and the stranding unit 2 then comes into contact with the outer edge of the deflector plate 13, which prevents the stranding unit from touching the flange provided at the front end of the winding drum 18. The distribution unit is then wound onto the winding drum 18 in the same way as in the case of the direction according to FIG. While the rotating ring 19 is driven via the V-belt pulleys 28, 29 and the endless belt from the main drive shaft 12, the speed of the winding drum being in a constant ratio to the unwinding speed of the stranding elements, the rotating ring 19 is driven via the V-belt pulleys 28, 29 and the associated endless belt is driven at a constant speed ratio with respect to the unwinding speed of the stranding elements in order to wind the stranding unit onto the winding drum, while the stranding takes place with a constant lay length. The winding drum 18 is set in rotation by the motor 35 via the V-belt pulleys 36, 37 and the associated endless belt, whereby the stranding unit is wound around the winding drum while it is pulled against the rotating ring due to the tension exerted. In addition, changes in the in FIG. 5 the speed of the rotating ring with respect to the speed of the winding drum proportional to the increase in the winding diameter of the stranding unit on the winding drum. If the unwinding speed of the stranding elements is denoted by V (m / min) and the speed of the rotating ring is denoted by N (rpm), the number of turns per length of the stranding unit is equal to N / V.

In the case of the FIG. 1 to 3 described embodiment, the rotating ring rotates at a lower speed than the winding drum. However, if the direction of rotation of the shaft 16 and thus the winding drum 18 is reversed while the direction of rotation of the motor 35 is maintained, the direction of twisting is reversed and the rotating speed of the rotating ring is greater than that of the winding drum. The difference in the rotational speed of the winding drum and the rotating ring depends in the same way as described above on the unwinding speed of the stranding elements and the change in the winding diameter of the stranding unit wound on the winding drum. In this case, the number of twists per length of the stranding unit results from:
Initial stage of twist:

V d

Final stage of the twist:

?! j J_

V Ji (Z ₂

In the explanation of the embodiment according to

F i g. 4 the case was addressed in which the speed of the take-up drum is lower than that of the Rotating ring is; however, the speed relationship between these two rotating parts can also be reversed will; in this case applies to the above relationship:

Unwinding speed of the stranding elements in the initial stage:

Unwinding speed of the stranding elements in the final stage:
N {lk) d _t .

The number of twists per length of the stranding unit is then the same:

Initial stage of twist:
,

Final stage of the twist:

(\ -k) nd _t '

In the case of the in FIG. 5, the arrangement can also be made such that the The winding drum is not rotated by the stranding elements and instead the winding drum is rotated with it a greater speed than that of the rotating ring is driven, depending on the Unwinding speed of the stranding elements, the direction of rotation of the motor being the same as the direction of rotation of the rotating ring remains.

When the torque of the engine of FIG. 2 and 5 is used as a brake, the Motoi be replaced by a mechanical or electromagnetic brake.

For this purpose 3 sheets of drawings

Claims (1)

15th Claim: Device for SZ stranding of stranding elements for telecommunication cables to a stranding unit with changing lay length, in which the cable stranding elements are fed continuously and parallel in the longitudinal axis of the stranding device and separated from one another by means of a fixing device to a rotating stranding nipple, with a winding drum aligned with the axis of the stranding nipple on which the cable is wound over a guide roller in spiral layers, thereby ge ken η show that the guide roller or rollers (20, II A 23) on a unilaterally self-supporting winder drum (18) coaxial, this surrounding rotating ring (10) are arranged that the rotation nd geeen about the rotating or stationary Winding drum (18) with the same or less damaging Speed and with constant or alternating direction of rotation as well as with speed adjusted to the stranding parameters parallel to the axis of the winding drum (18) back and forth is ικκΐ that on the dem Stranding nipple (8) facing the end face of the winding drum (18) a deflector plate (13) with for Winding drum is arranged aligned axis, which is driven separately via a shaft (15) is. " ₃ above the winding drum and vice versa not uoer tiei n. _{Al) In addition, it is known from} the French W 649 to guide the cable over arranged rollers which can be moved parallel to the winding drum. For this purpose, the rollers are slidable Facility, Z Tm Biieel is mounted so that it can be pushed back and forth, Sest g De? 'This gives iVnvTiK weight to the running bracket because it also carries the device ΪΧΪ' moving the rollers. High stranding speeds are therefore not possible with this device. Finally, there is a device for stranding ■ .'erseielementen for telecommunication cables of the input .eociK. «. German Auslegeschnft f I ⁿ 6 ^a 6 ⁿ 3 The “With this versing device is the guide roller over which the cable is wound on the winding drum“ ■■>? · **. .st attached to a stranded yoke that revolves around the Aufw.ckelt omr-1. The well-known verse, device does not show any means of how this guide roller is guided on the yoke of the axis of the winding drum so that the cable is wound onto the winding drum in a spiral shape. similar to the, ranzosiscc. Patent specification f 262 649, provide, if this results in a reduction in the verses '.! -' of the increased weight