JPS58214219A - Random pitch twisted wire and method of producing same - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a random number pitch stranded wire and a method for manufacturing the same, and more specifically, a stranded wire whose twist pitch is randomly selected for each appropriate length section of the stranded wire, and a method for manufacturing the same. This invention relates to a stranded wire that changes one after another by taking a random number value within a numerical range, and a method for manufacturing the same.

Conventionally, in communication cables, the twisting pitches of multiple twisted pair wires or quad twisted wires to be assembled are made to be different from each other.
Techniques for improving the crosstalk characteristics of communication cables are widely known. This is a measure to reduce the static coupling and electromagnetic coupling between each stranded wire, but one set of cables (i.e., if there are many stranded wires included)
This means that it is difficult to manufacture these wires with different twist pitches, and the management process of selecting and combining stranded wire bobbins with different twist pitches and mounting them on the sending part of the collecting machine is also complicated. Currently, it does not have sufficient effects due to its shortcomings, such as:

In addition, recently, as so-called office automation has become popular, various electronic devices have been actively used, and in offices, laboratories, factories, etc. There is a situation in which these devices are complicated and close to each other, and there is a risk that each of the four child devices may be confused or malfunction due to electromagnetic induction between these tables. Furthermore, with the recent rapid advancement of computerization, there is a tendency for people to worry about similar accidents even if they are inside the engine compartment of a car.

This invention was made in view of the current situation, and is suitable for communication cables, control cables, human power cables, etc.
The present invention provides a new random number pinch stranded wire that can be applied to all types of wires, and a method for manufacturing the same.

FIG. 1 explains the random number pitch twisted wire S of the present invention, and for the sake of simplicity, it shows a twisted wire pair made by combining two elementary W- wires, but it is of course limited to twisted wire pairs. The same applies to quad stranded wires or stranded wires containing any number of strands.

FIG. 1(a) shows the length of the stranded wire.In the section O, it has a twist pitch p, in the next section of length L2, it has a twist pitch p, and in the next section, it has a twist pitch p. , the twist pitch changes one after another for each appropriate length section of the twisted wire, and the straight line to be taken as the twist pitch is, for example, pL=50.7.
Random numbers such as 8, 91, 61.86 degrees are set. The number of axes of this random number (as a direct range, it is normal 1 city 1
In the case of stranded wire for cables, for example, 30+m≦p=≦
150 mm is preferably used, but this range will of course vary depending on the purpose of the stranded wire. Also, the same figure (
b) shows the case where the length L of successive sections with the same twist pitch is the same, and this is actually easier when going on a back road.

Next, a method of manufacturing such a random pitch twisted wire will be explained with reference to FIG. 2, which shows an example of an apparatus for carrying out this method, and FIG. 3, which also shows a circuit diagram.

In FIG. 2, which shows the most basic form of a twisting machine, a first pulse generator PG is provided for the fly f2c of eight twisting machines. This is close to the outer periphery of the oral part of the flyer 2, for example, a magnet or photoelectric element 2 is placed in one piece or divided into equal parts around the circumference.
Plural fryer 20) Generates one or more pulses per rotation.

Next, a measuring wheel 4 with a known circumference t is provided in the middle of the product twisted @S being wound up by the winding device 5 and traveling, and this measuring wheel 4 is provided with a second pulse generator PG2 similar to that described above. .

FIG. 3 shows a block diagram of the 1m system using this invention. First, the first pulse generator PG.

A first counting circuit c1 counts the number of pulses generated by the p2 pulse generator PG2, and a second counting circuit C2 counts the number of pulses generated by the p2 pulse generator PG2. If one pulse is emitted for each rotation of the flyer 2 and measuring wheel 40), then 01 pulses are counted in the first counting circuit C1 for every n1 rotations of the flyer 2 within a certain period of time, and For every n2 rotations of the measuring wheel 4 within the same time period, n2 pulses are counted by the second counting circuit C2. Therefore, in this case, the number of rotations of the flyer 2 is nl, and the traveling speeds of the product strands S are n and z, ζ
The twist pitch p is calculated as p""n21/n1. However, the circuit that actually performs this calculation is the arithmetic circuit. A comparison circuit CP is also provided,
A pitch value p is inputted from this comparator circuit CP & this arithmetic circuit A, and a random number pitch p within a desired numerical range to be compared with this is inputted from a separately provided random number generator or random number tape reader. . In this comparator circuit CP, a comparison is made between the pitch value p of the twisted wire S, which is currently being twisted, and the set random number pitch value pj. When p=pL, the current operating state is of course sufficient, so there is no output from the comparator circuit. When p>pL, a negative pulse is output from the comparison circuit CP and enters the motor control circuit, which decelerates the motor M that drives the winding device 5.

When p<p=, a positive pulse is output from the comparator circuit CP and enters the motor control circuit, causing the motor M to speed up. In this way, the twist pitch p in the twisting process currently in progress is
The winding speed of the stranded wire is adjusted so as to be equal to the pitch tp↓ while constantly comparing the pitch pL with a set random number pitch pL.

Now, it is assumed that one random value, for example, p & twist pitch, is adjusted during the length section of the stranded wire, that is, the length L shown in FIG. 1, for example. At the end of this length section, the number of pulses can be detected by the Z-th pulse generator PG2 provided on the measuring wheel 4ζ, so at this point the random number generator or tape reader TR can be detected.
The i signal is sent to input the next random value, ie, p, into the comparator circuit CP. A practical and simple method is to display, for example, 200 to 800 random numbers within a desired numerical range in the binary representation format shown in the figure on the magnetic tape 1 (Fig. 4). The magnetic tape 7 may be rotated in a circular manner to be read by the tape league TR, and the read random number may be input to the comparator circuit CP as the set random number at that time. In this way, for each section of the length L of the stranded wire, a stranded wire with a random pitch of +1 can be easily obtained, with the twisting pitch sequentially changing to a random number, p, p, p, .

It should be noted that the numerical values on the tape 8 on the left side of FIG. 4 are the binary representation of the magnetic tape 7 on the right side converted into decimal representation. Furthermore, as a random number generator, the Japanese Industrial Standard (JIS)
), a mathematical operation such as the continuous method or the median square method is performed based on the principle of creating random numbers, and then the digit of the resulting number is used.

In this embodiment, the number of revolutions of the flyer 2 is counted as a digital quantity by the first pulse generator a P G rζ, and the traveling speed of the stranded wire S is also determined by the second pulse generator PG, which is measured per unit time of the measuring wheel 4. The number of revolutions per rotation is counted as a digital quantity, and control is performed by calculating and comparing these digital quantities.

However, it is also possible to adopt a modified embodiment in which the rotational speed of the fryer 2 is detected by an analog signal such as a voltage using a tacho generator, and the winding speed is controlled by a control circuit and a comparison based on an analog view. .

The length L of consecutive sections with the same twisting pitch depends on the type of stranded wire and the purpose of use, but for short ones such as those for automobiles and control purposes, L = 2 to 3 m.

L=lO~20m is appropriate for communication cables.

The random number pitch strand of this invention is one type of stranded wire as a whole even though the strand pitch fluctuates so-called randomly in the longitudinal direction. When manufacturing cables, the collecting machine Q may be equipped with a bobbin for random number pitch quad twisting without any consideration. For example, when collecting 5-wire communication cables, the probability that parts with the same twist pitch exist in parallel with each other for 5 θ) quad strands 4 is fairly low; The effect is that it is possible to achieve the same result as when five-cut cables are assembled by intentionally differentiating the twist n pitch by one point, with extremely low accounting effort and low cost.

In addition, it is possible to effectively eliminate or reduce the inconvenience caused by electromagnetic induction when controlling cables for electronic equipment, such as 4-cable cables, etc., by connecting multiple cables in close proximity. This is truly an epoch-making move as a demarcation line for the so-called 21st century.

[Brief explanation of the drawing]

FIGS. 1(a) and (b) are simplified side views showing one embodiment of the present invention, and FIG. 2 is a simplified side view showing an example of a basic twisted wire IT for carrying out the method of this invention. , FIG. 8 is a circuit diagram explaining the invention in detail, and FIG. 4 is a simplified plan view showing an example of a magnetic tape indicating random numbers. PG2 ・Second pulse generator, C1°C2
... Counting circuit, A calculation times 4, cp comparison circuit, T)
L Tape league or random number generator. Figure 4 Figure 2 Figure 3 Figure I

Claims (1)

[Scope of Claims] 1. In a twisted wire formed by twisting a plurality of strands), the twisting pitch value is a random value (p=) within a desired numerical range in each appropriate length section. Random number pitch twisted wire characterized by changing as follows. 2. (a) A step of detecting the number of rotations (nl) of the stranded wire flyer (2) within a certain period of time;
tz, ), and (for the running length n2t of the stranded wire detected from each of the seven steps) and the number of rotations (n,)) for each appropriate stranded wire length section t. This step is to sequentially set random numbers within a desired numerical range, and (e) the twist pitch 1 straight (p) calculated by setting the front element at this point and the set random number value (p↓). (f) As a result of the comparison step, when p>p, the rotation speed of the winding device of the wire twisting machine is increased, and when p<p=, the rotation speed is increased. A method for manufacturing a random number pitch stranded wire, the method comprising: controlling cloudiness so as to lower the stranded wire.