JPS58103709A - Method of producing unit type communication cable - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

The present invention includes a pair twisting step in which insulated core wires are twisted together to form a pair, a collective twisting step in which a plurality of pairs are twisted together to form a unit, and a cable core is formed by twisting a plurality of units. This relates to a method for manufacturing a unit-type communication cable in which a tandem twisting and twisting step is performed.A general method for obtaining a unit-type communication cable is to form a pair of wires using a twisting device and wind them, and then to wind the pair of wires. The fibers are transferred to another twisting device and twisted together into a unit.

[It is known to form a cable core by twisting units together. However, this method involves moving the bobbin from the twisting device to the twisting device, which poses problems in terms of work efficiency and In addition, the bobbins around which the insulated Jb wires are wound are mutually rotated to form a pair of wires, and the pair of wires are twisted together to form the cable core. It is also known that However, this method requires a rotational drive source for each bobbin around which the insulated core wire is wound, which makes the equipment expensive, and requires a large feeding space because the bobbins are rotated to a certain degree. Therefore, this method is generally only applicable to obtaining relatively small cable pairs, such as 25 pairs or less. The object of the present invention is to provide a manufacturing method that can efficiently produce a unit type communication cable including pairs of wires using inexpensive equipment. Further, it is an object of the present invention to provide a manufacturing method for obtaining a unit type communication cable with excellent electrical characteristics.Hereinafter, embodiments of the present invention will be described with reference to accompanying drawings. First, the overall flow will be explained with reference to FIG. 1 and 3 are first and second bobbins, respectively, and insulated core wires 2 and 4 are wound around these, respectively. The second bobbin 3 is arranged so that its body is absolutely parallel to the traveling direction of the perpendicular wire 2, and the insulated core wire 4 is skewered from the side of the bobbin by the rotation of the rotary flyer 5. It looks like this. Now, the insulated wire 2 is passed through the center notch of the second bobbin 3, and the insulated core wires 2 and 4 are wound 1f from the respective bobbins 1 and 3 by taking off the cable core 12. 4 is fed out so as to be wrapped around the insulated core wire 2 by the rotation of the rotary flyer 5, and a pair of wires 5 is formed. , a pair of wires without one-sided twist can be obtained, similar to the pair of wires produced by the pairing device commonly used up to now. Fixed twist pair devices a, b, c, d that operate as above
,... are arranged as many as the number of pairs forming the cable core, and these fixed pair twisting devices a, b, C, d,...
The pairs of wires 6 formed by These units 9 are twisted together in a twisting die 10, and the upper tape is wound in an upper tape winding device 11 to form a cable core 12, which is then wound up by a winding device 151c. It is housed in the rotating cradle 13 together with #14, and the rotating cradle 13
is rotated in a direction perpendicular to the traveling direction of the cable core 12, thereby collectively twisting the pairs of wires 6 to form a unit 9, and twisting the units 9 to form a cable core I2. The figure shows an example of a fixed type twist pair device. 1
6 is a bobbin support frame, and the second bobbin 3 is attached to a shaft 17 that is rotatably provided with this.
The shaft 17 is provided with an insertion hole 18 for the insulated core wire 2, so that the insulated core wire 2 advances through the center of the second bobbin 3. Reference numeral 20 denotes a fryer support frame, on which the rotary fryer 5 is rotatably supported.When tension is applied to the insulated core wire 4 by pulling the cable core K,
b) The rotary fryer 5 rotates to transfer the insulated core wire 2 to the insulated core wire 4.
is unrolled in this manner to form a pair of wires 6. At this time, if the pair of wires 6 is formed with the second bobbin 3 fixed without forcing rotation, the pair of wires 6 The pair twist pitch is equal to the length per turn of the insulated core wire 4 wound around the second bobbin 3, and the pair twist pitch is generally too small for a pair wire for communication cables. be. Therefore, by rotating the second bobbin 3 in the same direction as the rotation direction of the rotary fryer 5 and at a rotation speed slower than the rotation speed of the rotary fryer 5, an appropriate twisted pair pinch can be obtained. , it is necessary to transmit the rotation of the motor 2I to the second bobbin 3 via the pulley 22, belt 23, and pulley 24. in this case,
By increasing the rotational speed of the motor 21 in stages or continuously as the amount of turns of the insulated core wire 4 decreases, the wire pairs 6 have a uniform twist pitch in the longitudinal direction.
will be obtained, and each fixed type twist pair device a, b
%c, +J, ..., when the rotational speeds applied to the bobbin 3 of "2" are the same, the obtained cable core 1
The pair twist pitches of each pair of wires 6 are the same, which is unfavorable in terms of electrical characteristics. Therefore, it is necessary to at least make the pair twist pitches of adjacent wire pairs 5 different within the same unit. For example, assuming that one unit is formed by fixed type twisting pairs a, b, c, and d, the rotational speed of each fixed type twisting pair a% b, c, dt7''1 7th'' bobbin 3 is Either all the twisting devices should be made to be the same, or at least the rotational speeds of the second bobbin 3 between the two fixed pair twisting devices a and b, b and c+c forming adjacent pairs should be made different. related. As a means for varying the rotational speeds of the second bobbins 3 of the fixed pair twisting devices a, b, c, and d, the rotational speeds of the motors 21 may be varied. When the second bobbins of each fixed type twisting pair device a, b, c, and d are commonly driven by one motor, the shaft 17 is used.]
It is sufficient to make the diameters of the pulled pulleys 24 different from each other. Reference numeral 25 in FIG. The single twist of No. 6 is further improved. As explained above, the present invention collects and twists pairs formed by a fixed pair twisting device with multiple heads arranged into a unit using a twisting device of a winder rotation type, and twists these units together to form a cable core. The rotational speed of the second bobbin of the fixed pair twisting device is adjusted so that at least the twist pitch of adjacent pairs in the same unit is different, and the unit type communication has excellent electrical characteristics. You can get cables very efficiently. However, since the fixed pair twisting devices only need to be placed at a distance that allows the rotary flyer to rotate, many fixed pair twisting devices can be placed in a limited space, and tandem manufacturing of multi-pair unit type communication cables is possible. becomes the turning part.

[Brief explanation of the drawing]

FIG. 1 is an overall explanatory diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of an embodiment of the fixed type twisted pair device of the present invention.

Claims (1)

[Claims] 1 Place the insulated core wire wound on the first bobbin into the second bobbin! The insulated core wire wound around the second bobbin is let out from the side of the second bobbin by a rotary fryer, and the insulated core is let out from the first bobbin. A fixed type pair twisting device that forms pairs by winding them around the wire is arranged, and the pairs formed here are divided into groups of multiple wires each, and the wires are twisted at right angles to the cable core traveling direction of the cable core winding device. A method for manufacturing a unit type communication cable, in which a plurality of units are formed by collectively twisting pairs of wires in each group by rotation in the direction, and a cable core is formed by twisting these units. The bobbin is rotated in the same direction as the rotary flyer and at a rotational speed lower than the rotational speed of the rotary fryer, and the twisting speed of each pair twisting device is adjusted such that at least the pairwise pinches of adjacent pairs in the same unit are different. A method for manufacturing a unit type communication cable, characterized in that the rotation speed of the bobbin (2) is adjusted.