JPS5811042B2 - Method for manufacturing parallel flat twisted line pair cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a new parallel flat type twisted line pair cable that can be pressure-connected all at once and has a new structure in which twisted line pairs with different twist pitches are parallelized at least between co-adjacent pairs. This is related to a manufacturing method that seems to be the case.

The twisted wire pairs are integrated into a parallel flat type, and the twist pitch is different between the pairs of core wires that are adjacent to each other, making it easy to identify the order of the wire arrangement and the distinction between the signal wire and the ground wire. In addition, each of these core wires can be easily separated or branched at either the terminal or intermediate portion, and furthermore, the connection with the connector can be made all at once by pressure welding or other methods. The emergence of a flexible flat cable that can be implemented in a variety of applications has been a long-awaited issue among various equipment designers.

However, realization of this has been considered almost impossible due to manufacturing technology, especially when it comes to practical application of batch pressure welding connections.
It is necessary to untwist the twisted wire pairs with different twist pitches all at once at any connection point, arrange them in a regular order at precise intervals, and fix them with adhesive to make a flat cable.
It was extremely difficult to carry out this process automatically as a continuous mechanical operation, and it was no wonder that it was considered impossible.

The present invention provides a unique new structure to the structure of parallel flat twisted line pair cables, and also uses a unique new manufacturing method to enable precise parallelization in arbitrary locations, which was previously thought to be impossible. In addition, as mentioned above, it is possible to manufacture a cable that satisfies all of the many performances that have been desired for many years.

FIG. 1 shows the structure of a new parallel flat twisted line pair cable which is the premise of the manufacturing method of the present invention.

1゜2.3. . . . nl are each arranged in a parallel flat shape in pairs of twisted lines, and each pair is kept in a non-adhesive state.

This parallel cable is made by untwisting six pairs of twists for every arbitrary length (P1+P2), or by untwisting a part (P2) of the twists, and adhesively molding them into a single-fiber parallel flat cable.

This bonding state is extremely precise and is bonded at exact intervals and in a fixed line order, allowing for so-called one-touch connection with a connector of the batch pressure connection type having a U-shaped blade.

Further, the six pairs and each single fiber wire are bonded to such a degree that they can be easily separated.

In the drawing, 1', 2'. 3'...n' indicates the bonding state of the twisted wire pairs that have been twisted or untwisted, respectively.

Also, the signal lines S1°S2. in the 6 pairs. S3.・・・・・・
Each of Sn is connected to 6 pairs of ground wires G1°G2. G3. ...
. . . They are arranged in such a way that they always alternate with each of Gn.

The length of the non-adhesive portion P1 does not necessarily have to be constant.

The 6 pairs are parallel flat 2-core wires, 5-core wires with twists, or 2-wire strands.

Figure 2 shows a two-core countersunk flat wire used in the cable of the present invention.
A cross-section of a three-core countersunk flat wire is shown, and FIG. 3 is a cross-section of a two-stranded wire.

Figure 4 shows the three twisted core wires used in the cable of the present invention.
The major feature is that it is not a double-stranded wire, but a three-core countersunk flat wire as shown in FIG. 2, with a twist as shown in FIG. 4.

As can be seen from FIGS. 2, 3, and 4 above, the parallel flat pair cable (hereinafter, "pair" includes not only 2-stranded cables but also 3-stranded cables) obtained by the manufacturing method of the present invention. ) The basic condition is that each pair of twisted wires has a shape that can draw a rectangle or ellipse of approximately the same size and shape circumscribed to its cross-sectional shape at any part of its entire length. This is a prerequisite for being able to implement the unique new manufacturing method described below.

In particular, the structure shown in FIG. 2, in which various two-core or three-core countersunk flat wires are twisted to form a pair, is an ideal structure for implementing the present invention.

In FIG. 1, twisted line pairs 1, 2, 3. . . . In the non-bonded portion P1, the twisting or twisting pitches of the adjacent pairs are slightly different from each other, if necessary, for each pair.

Therefore, during use, mutual interference of signal currents flowing between adjacent pairs or between each pair is limited to a minimum.

Since the parallel flat twisted line pair cable of the structure illustrated in FIG. 1 has the above-described structure, it can satisfy all of the conditions conventionally desired for parallel flat cables.

FIG. 5 shows a method of manufacturing a parallel flat twisted line pair cable as shown in FIG. 1, and is an embodiment of the present invention.

1, 2, 3.・・・・・・N is a twisted line pair, which is a two-core or three-core countersunk flat electric wire that has been twisted or twisted in advance, or a large number of two-wire twisted electric wires that are paralleled in a non-adhered state. The fibers are being transported at the same speed and being introduced into the untwisting device 10.

In the drawings, six pairs of diagonal lines indicate the twist or twist pitch.

The untwisting device 10 has untwisting bases 4-1, 4-2, 4-
3. . . . A control mechanism is built in to arbitrarily control the 4-n and their caps to either a rotating state or a stopped state.

Each twist line pair 1, 2, 3. . . . The twist or twist pitches applied to each n are slightly different between co-adjacent pairs, and if necessary, are mutually different across all pairs.

Each twisted wire pair 1, 2, 3. . . . n is the husband's untwisting base 4-1, 4-2, 4-3. . . . Introduced into a rectangular or elliptical through hole provided at 4-n and passed through.

At this time, all the bases stop or rotate all at once for each length required by the cable, and when stopped, untwist or twist each twisted core wire pair corresponding to the stopping time and passing speed, and then rotate. In the case of , the six pairs of twisted wires are allowed to pass through the group of twisted wire pairs without changing the twisted state.

In the figure, 1', 2', 3', .

P2' indicates the length of the portion that is untwisted all at once in the group of parallel twisted line pairs.

Further, P1 indicates a portion of the twisted fiber pair group that has passed through without being untwisted.

When the P2' portion reaches the bonding devices 11, 12, the bonding devices 11, 12 operate to bond the untwisted portion.

In this bonded state, the precision grooves provided in the bonding roll allow precise crimping and connection with precise spacing and regular core wire arrangement.

In this example, an example is shown in which the connection is made by vertical movement of the heat-pressing connection roll, but this method may be performed using adhesive, heat bonding using plastic tape, or any other method that is precise and accurate. Any method that allows for proper adhesion is fine.

After the untwisted portion has passed, the bonding devices 11 and 12 stop the bonding operation and allow the group of twisted wire pairs to pass in an unbonded state.

In the figure, a shaded portion P2 indicates a state in which the untwisted portion P2' is adhered.

The rotation and stop periods of the untwisting nozzle group are exactly the same as the non-adhesion and adhesion periods of the connecting device, respectively, and depend on the wire speed, the untwisting device,
A time delay is given to the start and stop of operation depending on the distance between the bonding devices, so that only the untwisted portion P2' is always accurately bonded and molded as P2.

As described above, the manufacturing method of the present invention arranges and parallelizes a plurality of pairs or three twisted wires in a regular order and maintains a non-bonded state between six pairs or three twisted wires. During the transfer, all pairs or three twisted fibers are untwisted partially at once using an untwisting device, and then each single fiber wire is untwisted in a regular order and only in the untwisted portion using a bonding device. This is a manufacturing method in which cables are precisely aligned and parallelized at intervals and bonded to each other to form an intermittent bonded parallel flat pair or three twisted cable.

FIG. 6 and FIG. 7 each show an example of the nozzles of the untwisting nozzle group which are installed in the untwisting device 10.

4 is a base body, and 5 is a rectangular or elliptical through hole.

The shape of this through hole is similar to the rectangle or ellipse that can be drawn circumscribed to the cross-sectional shape of the parallel flat electric wire or two twisted electric wires shown in FIGS. It is sized to have a gap that allows for easy passage.

Furthermore, the thickness of the cap is as thin as possible while withstanding the thickness and strength of the wire, the more convenient it is for the wire to pass through.

Reference numeral 6 denotes a cam portion provided on the outer periphery of the cap, which engages with a stopper pin to be described later to stop the rotation of the cap and determines the order in which the lines are arranged during bonding.

Figure 7 shows an example of the structure of the untwisting cap when the wire is thick.
The rectangular through holes are formed by long and thin rotatable rolls 8, 8', and 9.
, 9' are combined to reduce resistance when the wire passes through.

If this structure requires an oval through hole, roll 8,
This is obtained by making 8' and 9,9' concave.

Figures 8 and 9 are schematic diagrams illustrating the principle of arbitrarily untwisting or untwisting stranded wires to change them into parallel wires, or maintaining the twisted state as they are, using the above-mentioned cap. be.

In the figure, 1 is a right-twisted pair of parallel flat electric wires 1' is a parallel flat electric wire that has been untwisted 4 is an untwisting base 5 is a rectangular or oval through hole 6 is a cam provided on the outer periphery of the base. In the meshing part 7, the strapper pin S1 is connected to the signal line G1 forming the pair.
indicates the ground wire.

The cap 4 is rotatably held by an untwisting device 10 in FIG. 5.

By lowering the stopper pin 7 and engaging it with the engaging part 6 of the cam, the rotation of the cap is stopped and the eighth
As shown in the figure, when a twisted pair parallel wire is introduced and passed through the through hole, the twisting of the twisted pair parallel side wire is blocked by the rectangular through hole, and is accumulated between the feeding portion of the wire and the base, reducing the twist pitch therebetween.

Instead, the twisted pair parallel wires that have passed through the base are completely untwisted, transformed into a simple parallel flat wire 1' as shown in the figure, and then transported.

P2 shown in the figure indicates that this part is the bonded part of the parallel flat pair cable.

FIG. 9 shows a case where the stopper pin 7 is raised.

In this case, the cap 4 automatically rotates naturally in the direction of the arrow (counterclockwise) along the twist of the outer shape of the right-handed flat wire.

If the base 4 is lightweight and small, this rotation will be carried out smoothly with almost no resistance, and the twisted pair parallel flat wire can pass through the through hole 5 provided in the untwisted base without undergoing any deformation. can pass through.

Therefore, according to the structure of the parallel flat pair cable to be manufactured, a signal corresponding to the intermittent adhesion is given, and when the stopper pin is moved up or down depending on this signal, the cap is stopped as shown in FIG. By rotating as shown in the figure, the twisted wire pair material can be untwisted, or it can be passed through while maintaining the twisted state.

Therefore, as shown in Fig. 5, a group of stopper pins, and a control mechanism for the stopper pins are built into the depressing device, and the stopper pins are raised and lowered all at once when used as shown in Fig. 5. Therefore, it is possible to untwist a large number of parallel electric wires all at once, or to allow them to pass through without untwisting.

When the stopper pins are stopped all at once, the twist pitch of each twisted wire pair is different, so there will be an error of up to one rotation before the pin and cam engage when the cap actually stops.
In other words, the untwisted length of each twisted line pair corresponding to the adhesive part P2 in the cable shown in Figure 1 causes a length error equivalent to a maximum of 1 pitch, but this does not pose a problem in terms of cable performance. It is.

Since the meshing part 6 of the cam is only one point per circumference, the characteristic of this untwisting method is that after untwisting, that is, after passing through the nozzle, the relative positions of the parallel flat wires, such as left and right, top and bottom, front and back, with respect to the stop position of the nozzle. is always constant.

For example, the left-right relationship between the signal line S1 and the ground line G1 in FIG. 8 is always constant when the cap is stopped.

Therefore, when a large number of twisted wire pairs are untwisted all at once using a large number of base groups as shown in FIG. 5, there is a great advantage that the arrangement order of each single fiber wire after untwisting is always constant.

That is, it is due to the action of this cap that it is possible to perform a connector connection operation by collective pressure welding at the bonded portion of the parallel flat pair cable shown in FIG. 1 manufactured by the present manufacturing method.

In the case of a 3-core parallel flat wire, etc., where there are ground wires on the left and right sides of the signal line, and the left and right arrangement of the 3 cores at the adhesive part is not a problem, connect the cam part around the untwisting base in two places. In this way, two engagement parts with the stopper pin can be provided around the base.

In this case, the left-right relationship of the parallel wires after untwisting when the base is stopped is not constant, but a cable can be obtained in which the order of each pair is constant as originally set.

In this case, the above-mentioned error in untwisting length will be halved.

In this explanatory diagram, the rotation of the untwisted cap is described as a natural rotation due to the rotational force generated by the twisting of the parallel wires, but if the sheathing of each twisted wire pair is weak, the conductor is extremely flexible and the cap is rotated naturally. In cases where the generation of force to rotate is small, forced rotation may be performed using a torque motor or synchronous motor.

Alternatively, a structure in which a blade is attached to the return cap may be used to assist the natural rotation of the cap using air pressure.

Similarly, if the sheathing of each twisted wire pair is weak, if the conductor is strong and requires strong force to untwist, or if each single-core wire is thick, there is a risk of damaging the wire sheathing when the cap is stopped or untwisted. Therefore, as shown in FIG. 7, it is preferable to form a rectangular or elliptical through hole depending on the combination of long axis rotating rollers.

In this case as well, if the cap becomes larger and the resistance during rotation increases, it may be necessary to forcibly rotate the cap or provide rotational force assistance using various methods.

The manufacturing method according to the present invention is extremely easy to carry out for parallel flat twisted wire pairs because the cross-sectional shape is stable over the entire length and the rotational force applied to the untwisting cap is stable. I can do it.

However, in the case of two-stranded wires, the twisting pitch is accurate, the tension applied to the two-core wires during twisting is uniform, and the conductor and each single-core wire are not too flexible. You can.

That is, if this condition is not satisfied, when the twist that is untwisted when the cap is stopped is accumulated in the front part of the cap, the twist may not be sufficiently dispersed and may get caught in the through hole of the cap. This is because when the cap rotates, the resistance causes the cross-sectional shape of the cap to collapse when it is guided into the through hole of the cap, and there is a risk that it may get caught in the through hole.

In addition, the cross-sectional shape of the normal three-stranded wire is an equilateral triangle,
When parallelizing through rectangular or elliptical through holes, the arrangement tends to be disordered, and the probability of getting caught in the through holes becomes very high.

Therefore, in the case of three-stranded wires, it is necessary to use a core pair in which a three-core parallel flat electric wire as shown in FIG. 2 is twisted as shown in FIG. 4.

In the case of four twisted core wire (quad twisted) pairs, the manufacturing method of the present invention has no meaning and is almost impossible to implement.

In other words, it is desirable that the relative position between the four cores of a quad twisted wire pair be square, and it is impossible to parallelize them with this method, and such cables cannot be used as equipment wiring materials. This is because it is rarely used, and even when used as other communication cables, a two-core pair cable can be used as a sufficient substitute.

Further, when the parallel flat pair twisted wires are untwisted, the twisting of the parallel flat wires after untwisting is completely removed and the wires are straightened, so there is an advantage that the precision at the bonding part P2 is high.

On the other hand, when normal 2-strand or 3-strand wires are untwisted and straightened, a slight twist remains in each single fiber wire, and the twist is at one of the twist pitches in each of the 2 or 3 cores. Based on a lot of experience, we have learned that the molding accuracy of the bonded portion P2 deteriorates due to the phase difference of /2 or 1/3.

As described above, it is not impossible to carry out the manufacturing method of the present invention using ordinary two-stranded wires as paired wires, but it is better to carry out the method using parallel flat electric wires with two or three cores. It is easy to manufacture cables of good quality.

As described above, the manufacturing method of the present invention allows each pair of twisted line pairs to be drawn into an oval or rectangular shape that is slightly larger than an ellipse or a rectangle that can be drawn circumscribing the cross-sectional shape of each twisted line pair, and which is approximately similar to this. The wires are transferred while passing through the through hole of a rotatable cap having an elliptical or rectangular through hole, and each pair of twisted wires is untwisted all at once by the intermittent operation of stopping or rotating the cap to form the adhesive part P2. A major feature of this method is that it intermittently repeats two operations: the operation of twisting the fibers, and the operation of passing the fibers without changing the twisting state to form the non-bonded portion P1.

The manufacturing method of the present invention as described above makes it possible to reliably and accurately manufacture an intermittent adhesive type parallel flat twisted wire pair cable, which has been considered extremely difficult to manufacture in the past, in an extremely simple and easy manner, and reduces equipment wiring processing costs. It is believed that this technology can make a significant contribution to industry, such as by reducing the amount of noise and cable connection time.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a parallel flat twisted line pair cable obtained by the manufacturing method of the present invention, and FIGS. 2 a to i and 3 are parallel FIG. 4 is a cross-sectional view of a flat core wire and two-stranded wire; FIG. 4 is a front view showing the state of twisting and twisting three-stranded core wires in the implementation of the present invention; FIG. 5 is a diagram showing one of the manufacturing methods of the present invention. An explanatory diagram showing an example,
FIGS. 6 and 7 are perspective views and front views showing structural examples of the untwisting cap in the manufacturing method of the present invention, and FIGS. 8 and 9 respectively show how to untwist or untwist using the above-mentioned cap. FIG. 3 is a perspective view showing the principle of passing the original shape through the cap without returning it. 1.2,3.・・・・・・n・・・Twist line pair, 1
´, 2´, 3´. ......n'...Adhesion state of twisted line pair, 4
-1, 4-2... 4-n... Control mechanism, 4... Base body, 5... Through hole, 6
...Cam part, 7...Stopper pin,
8.8', 9.9'...Roll, 10...
...Untwisting device, 11.12...Gluing device, P
L... Non-bonded part, P2... Part of twist, P2'... Part that has been untwisted, Sl, S2
．． ...Sn...signal line, G1. G2.
G3... Ground wire.

Claims (1)

[Claims] 1. A plurality of twisted pairs of core wires are formed into a flat cable by maintaining a non-adhesive state between each twisted pair of core wires, and each twisted wire pair is maintained in a non-adhesive state, and the wires are attached at each arbitrary length of the flat cable or at both ends of the cable. Then, the twists of the pairs of core wires of the fully twisted circuit are partially untwisted all at once, and in this part, all the core wires are made into a single core wire arranged in parallel, and the six pairs are easily separated and bonded to each other. A method for manufacturing a parallel flat twisted line pair cable that can be connected all at once using a pressure welding type connector at the bonding site, the twisted line pair cables being transferred in parallel and bonded intermittently. Immediately before the group of twisted wire pairs is introduced into the bonding device, each twisted wire pair is formed into an ellipse or an oval shape that can be drawn circumscribing the cross-sectional shape of the twisted wire pair. It is made to pass through the through hole or guide passage of a rotatable cap having an elliptical or rectangular through hole or a guide passage that is slightly larger than a rectangle and has a substantially similar shape, and synchronizes with the twist of the twisted wire pair. The first operation is to rotate each base by rotating each cap to allow each twisted wire pair to pass while maintaining the twisted state, and the portion corresponding to the part to be glued of the twisted wire pair core group is attached to the base. When passing through the group, when each cap rotates once against the twisting of the twisted line pair core wire, the engagement part of the cam provided on the outer periphery of the cap is engaged with the stopper pin, and the rotation of each cap is stopped. By stopping all at once and letting it pass through, the twists of each twisted pair of core wires are partially untwisted all at once, and the group of parallel twisted pair of core wires in this part becomes a group of parallel non-twisted core wires. A parallel flat twisted wire pair cable characterized in that the cable having the structure as described above is formed by alternately repeating two types of operations, the second operation of introducing the deformation into the bonding device, at arbitrary intervals. Production method.