JPS6310851B2 - - Google Patents

Description

Detailed Description of the Invention The present invention comprises 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 plurality of pairs are twisted to form a unit. The present invention relates to a method for manufacturing a unit type communication cable in which the twisting step and the twisting step to form a cable core are performed in tandem.

A common method for obtaining unit-type communication cables is to use a pair twisting device to form a pair of wires and wind them, then transfer the pair wires to another twisting device to collect and twist the wires into units, and then twist the units to form a cable. It is known that it forms a core.
However, this method involves moving the bobbin from the twisting device to the twisting device, which poses a problem in working efficiency and requires a large space for placing the bobbin.

It is also known to form a pair of wires by mutually rotating bobbins around which insulated core wires are wound, and to form a cable core by twisting the pair of wires as they are.

However, this method requires a rotating drive source for each bobbin around which the insulated core wire is wound, making the equipment expensive, and requiring a large feeding space since the bobbins are mutually rotated. Therefore, this method is generally applicable only to obtaining relatively small pair cables of 25 pairs or less.

The present invention has been made based on the above, and includes:
The purpose of this invention is to provide a manufacturing method that can efficiently produce a unit-type communication cable containing a large number of pairs, such as 50 or 100 pairs, using inexpensive equipment.

Embodiments of the present invention will be described below with reference to the 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 parallel to the traveling direction of the insulated core wire 2,
The insulated core wire 4 is drawn out from the side surface of the bobbin by the rotation of the rotary fryer 5.

Now, when the insulated core wire 2 is passed through the center of the second bobbin 3 and the insulated core wires 2 and 4 are paid out from the respective bobbins 1 and 3 by taking up the cable core 12, the insulated core wire 4 rotates. As the fryer 5 rotates, the insulated core wire 2 is unwound to form a pair of wires 6. At this time, by appropriately selecting the feeding tension of the insulated core wires 2 and 4, it is possible to obtain a pair of wires without one-sided twist, similar to the pairs manufactured by the pairing device commonly used up to now. It turns out.

A fixed twist pair device a that operates as described above,
b, c, d...... are arranged by the number of pairs forming the cable core, and these fixed pair twisting devices a,
The paired wires 6 formed by b, c, d, etc. are divided into a plurality of groups and guided to each set die 7, and then coarsely wound tape is wound by a coarsely wound tape winding device 8. This results in unit 9.

These units 9 are twisted together by a die 10, and the upper tape is wound by an upper tape winding device 11 to form a cable core 12, which is then wound by a winding device 15.

The take-up device 15 is housed in the rotating cradle 13 together with the take-up device 14.
3 rotates in a direction perpendicular to the traveling direction of the cable core 12, thereby twisting the pairs 6 collectively to form a unit 9, and twisting the units 9 to form a cable core 12.

FIG. 2 shows an example of a fixed type twist pair device.

Reference numeral 21 denotes a movable pedestal, on which a stand 22 is provided. The bobbin 1 is connected to the stand 22 via the shaft 16, and the shaft 17 is also connected to the stand 22 via the shaft 16.
The shafts 16 and 17 are provided with insertion holes 23 for the insulated core wire 2.

18 and 19 are shafts 16 and 17 respectively
A rotary fryer that rotates freely relative to the
The wire rods 2 and 4 are fed out by these.

On the other hand, a pair of twisted soybeans 25 is provided on a pedestal 24 different from the pedestal 21, and a pair of wires 6 is formed here.

The bobbins 1 and 3 are placed on a pedestal 21 and transported by a lift or the like and stored at a predetermined location. During the twisting operation, twisting is started by placing the twisting die 25 at a predetermined position on the twisting device from the stock location.

The work of placing the bobbins 1 and 3 on the stand 21 can be performed independently of the operation of the twisting device, and when the previous work is completed, the bobbins to be used for the next operation are placed on the stand 21 together with the twisting device. placed in place. Therefore, the operating rate of the apparatus is significantly improved compared to the case where bobbins are replaced one by one.

It is generally possible to install three pairs of twisting devices on the pedestal 21, and the pedestal 21 is installed in the twisting device in one or two stages.

When the frames 21 and 24 are set at predetermined positions on the twisting device, tension is applied to the insulated core wires 2 and 4 by pulling the cable core. Along with this, the rotary flyers 18 and 19 rotate and the insulated core wires 2 and 4 are fed out, and the insulated core wire 4 is transferred to the insulated core wire 2.
A pair of wires 6 is formed.

At this time, if the pair of wires 6 is formed without applying rotation to the second bobbin 3, the twist pitch of the pair of wires 6 will be the same as the twist pitch per turn of the insulated core wire 4 wound around the second bobbin 3. The length of the wire is equal to the length of the wire, and the twist pitch of the wire pair is generally too small for use as a wire pair for communication cables. Therefore, by rotating the second bobbin 3 in the same direction as the rotation direction of the rotary flyer 19 and at a rotation speed slower than the rotation speed of the rotary flyer 19, an appropriate twisted pair pitch can be obtained. , it is preferable to transmit the rotation of the motor 20 to the second bobbin 3. In this case, if the number of revolutions of the motor 20 is gradually increased stepwise or continuously as the amount of turns of the insulated core wire 4 decreases, the wire pairs 6 having a uniform twist pitch in the longitudinal direction can be obtained. become. In addition, each fixed type twist pair device a, b, c, d...
When the rotational speeds applied to the second bobbins 3 are the same, the twist pitches of the pairs of wires 6 of the resulting cable core 12 are the same, which is unfavorable in terms of electrical characteristics.

Therefore, it is preferable that at least the twist pitches of adjacent pairs of wires 6 in the same unit are made different. For example, fixed twist pair devices a, b, c, d
If one unit is formed by The second fixed pair twisting device between two fixed pair twisting devices a and b, b and c, c and d.
The rotational speed of the bobbin 3 is made to differ. As a means for making the rotational speeds of the second bobbins 3 of the fixed type twisting pairs a, b, c, and d different, the rotational speeds of the motors 21 may be made different.

In addition, 26 in FIG. 2 is a straightening device consisting of two freely rotating pulleys, and by making one turn of the pair of wires 6 in this device, the one-sided twist of the pair of wires 6 is further improved.

As explained above, the present invention collects and twists pairs of wires formed by a multi-head fixed pair twisting device into a unit using a winding and rotating twisting device, and also twists these units to form a cable. It forms the core and allows unit type communication cables to be obtained very efficiently.

In addition, since the fixed twist pair device is installed on a movable pedestal, the delivery bobbin can be exchanged very efficiently, and the operating rate of the device is greatly improved.

[Brief explanation of the drawing]

FIG. 1 is an overall explanatory diagram of one embodiment of the present invention, and FIG.
The figure is an explanatory diagram of an embodiment of the fixed type twist pair device according to the present invention. 1: first bobbin, 3: second bobbin, 2,
4: Insulated core wire, 6: Pair wire, 9: Unit, 12:
Cable core, 14: Take-up device, 15: Winding device, 18, 19: Rotary flyer, 21: Frame,
25: Twist pair die, a, b, c, d: Fixed type twist pair device.

Claims (1)

[Claims] 1. Insert the insulated core wire wound around the first bobbin through the center of the second bobbin, and then insert the insulated core wire wound around the second bobbin into the rotary fryer by taking off the cable core described later. A fixed type pair twisting device is arranged to form a pair of wires by winding it from the side of the second bobbin and winding it around the insulated core wire unwound from the first bobbin. Each wire is divided into a plurality of groups, and the cable core winding device rotates the wires in a direction perpendicular to the direction in which the cable core travels, thereby twisting the pairs of wires in each group to form a plurality of units and burning these units. In the method for manufacturing a unit type communication cable in which the cable core is formed by combining the first bobbin and the second bobbin, the first bobbin and the second bobbin are both arranged on a movable pedestal, and a twisted pair die provided independently of the pedestal is also used. A method for manufacturing a unit type communication cable, characterized in that the cable is twisted to form a pair of wires.