JPS6012728B2 - Manufacturing method of multiple unit type communication cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel manufacturing method for controlling the position of strands in individual units of a multi-unit communication cable.

Multi-unit communication cables are very efficient in manufacturing because the assembly of pairs or groups of arms and the twisting of the groups of units can be performed in one step.

However, the conventional method of manufacturing this cable has the drawback that the collective pitch and phase of adjacent units are exactly the same. This makes it easy for crosstalk to occur between adjacent units.

In order to solve this problem, Hakama Kosho 38-472 and Tokuko Sho 39
-1736 To change the phase between adjacent units or change the twisting pitch by a method such as Japanese Patent Publication No. 47-33514. However, as a result of manufacturing a large number of devices, the present inventors have found that it is difficult to obtain sufficient crosstalk characteristics using these methods. In other words, it is difficult to relatively change the position of the strands in the unit sufficiently by simply rotating the batten of the unit twisted assembly board left and right, as in Samurai Koko Sho 38-4724 and Special Publication Sho 39-17364. It is. Particularly when the wire size becomes large or when the unit size becomes large, the rigidity of the unit becomes strong and sufficient phase change does not occur.

Furthermore, even with the method of Samurai Ko Sho 47-33514, when the wire size or unit size increases, it is difficult to maintain sufficient twist-stopping effect, and the twisting pitch changes, which is difficult. An object of the present invention is to eliminate the drawbacks of the prior art described above, improve the capacitive coupling between the quads of adjacent units, and prevent crosstalk between the units, regardless of the wire size or unit size. .

That is, the gist of the present invention is that in the swinging motion of the cluster battens provided in the unit twisting cluster board, when the cluster battens reach the maximum position at which the phase of each unit is changed,
The purpose is to temporarily stop the rocking motion of the collective battens depending on the rigidity of the cable unit. An embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a winding-rotation type simultaneous twisting machine, in which pairs of twisted or force-twisted wire groups 1, 2, and 3 for each unit are all constructed with different pitches within the same unit group. These unit groups reach the collecting die 7 through respective collecting plates 4, 5, and 6 installed on the unit collecting plate 4'. The collecting plates repeat swinging and stopping motions as shown in FIG. 3 within the plane of the collecting plates at different periods and speeds. Thereafter, each unit is bound by a rough winding head 8 with a rough winding tape for each unit color. Each color-coded unit 10 with roughly wound tape passes through a twisting die 11 to become a cable core 12, and an upper-wrap tape is applied by an upper-wrap tape forming machine 13 to form a multi-unit cable.
It is wound up at 4. The collective battens 4, 5, and 6 are driven by a motor 15 with a reduction gear as shown in FIG. The driving speed of the motor is controlled according to the period shown in FIG. 3, but the rotational speed of each plate 4, 5, 6 changes at mechanically different periods and speeds.

According to the experimental results, TL:TR:To=1:1:0.
A ratio of 3 to 0.5 is effective and T or TR
It has been revealed that an effective length of 6 to 10 mm in the longitudinal direction of the cable is effective for improving crosstalk characteristics. In the manufacturing method of the present invention, which is constructed as described above, the swinging movement of the group battens is temporarily stopped when the maximum position at which the phase of each unit is changed is reached, so that the change in the phase of each unit is To provide a multi-unit communication cable that is sufficiently effective regardless of rigidity, and therefore improves electrostatic coupling between quads of adjacent units regardless of wire size or unit size, and has a large crosstalk prevention effect between units. The industrial value of this technology is enormous.

[Brief explanation of the drawing]

The attached drawings show one embodiment of the method of the present invention, and FIG. 1 is a schematic explanatory diagram, and FIG. 2 is an explanatory diagram of the method as seen in the A-A' direction.
FIG. 3 is an explanatory diagram showing the operation of the collective battens. 1, 2, 3: Combustion or forced fuel wire group, 4, 5, 6: Collecting batten, 4〆: Unit collecting plate, 7: Collecting die, 8:
Coarse winding head, 9: plywood, 10: unit, 11: twisting die, 12: cable core, 13 Mikami winding tape forming machine, 14: winding machine, 15: motor. Curtain 1 and 2 Ax 3

Claims (1)

[Claims] 1 In a series of steps of assembling pairs or groups of couples to form a unit, and then twisting and assembling a plurality of units to manufacture a single multi-unit cable, A repeated movement of left rotation, stop, right rotation, stop, and left rotation is applied within the plane of the unit strand assembly plate at different periods and speeds for each, and this stopping time is controlled by the unit size and the wire size. A method for manufacturing a multi-unit communication cable characterized by: