JPS6134293A - Production of profile twisted wire having core wire - 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 (Industrial Field of Application) The present invention is based on a method of manufacturing a deformed ring with a core wire without having to insert a core wire into the core wire.

(Prior Art) Conventionally, metal wires are twisted together to produce a stranded wire with a core wire. For example, in Japanese Patent Publication No. 52-50299, after twisting and untwisting multiple wire rods,
Next, while inserting the core wire, the untwisted wire I is twisted together.

This method is used to prevent the core wire from protruding to the outer periphery due to slack caused by the twisting and shrinkage of the 15 wires. This is to prevent shrinkage.

According to the above method, it is possible to prevent the core wire from protruding to the outer periphery due to slack, but there remains the problem that stress (twist < 1 degree) remains in the m-wire.For this reason, When a wire with a hard 10 is used as a core wire, such as in optical fiber for communication, the core wire may be damaged during manufacturing or handling due to the twist remaining in the strands on the outer periphery. This will result in a second turn.

(Objective of the Invention) This invention was made in order to eliminate such conventional drawbacks, and eliminates the twisting tendency of stranded wires to eliminate the risk of damaging the core wires, thereby improving communication optical fibers. This makes it possible to use wire rods with a length of 1 to 1 as the core wire, such as the following.

(Structure of the invention) What is the first gist of this invention? X2 Several irregularly shaped wires are twisted together to create a hollow stranded wire, then this stranded wire is untwisted,
Next, while enclosing a core wire with a diameter smaller than the diameter of the hollow part, the above-mentioned wires were twisted again at a twisting pitch such that the residual stress became O to form a deformed stranded wire with a core wire. It is.

The second gist of the invention is to produce a stranded wire with a core wire by twisting a plurality of deformed cable wires around a core wire, and then to create a stranded wire with a core wire. At the same time as twisting, the core wires are removed, and then the wires are twisted again at a twisting pitch such that the residual stress becomes O, while incorporating a core wire with a diameter smaller than the diameter of the core wire, to obtain a deformed stranded wire with a core wire. It was designed so that it could be formed.

(Example) In FIG. 1, hollow Ll! Bobbin 2 wound with i-line 1
is held by a support stand 21, and this support stand 21 is held by a frame body 20 so as to be rotatable around an axis 25.

The support stand 21 is rotated by the drive motor 43 at a rotation speed of 31 degrees set by the transmission 23 .

As shown in FIG. 12, the hollow stranded wire 1 includes, for example, six deformed wires 5 twisted together to form a hollow portion 50. In order to omit the formation of the hollow portion 50, the deformed wires 5 may be twisted around the core wire 11 having a circular cross section. The hollow V5 wire 1 is twisted together in a conventionally known manner, and therefore has a so-called rotating habit (
residual stress). - Also, the wire twisting machine 3 has a central tube 31, a flange portion 32 formed on the outer periphery of the central tube 31, and a flange portion 32 held by an arm 36 protruding from one end. A&6, which is rotatably held around a central tube 31 by a frame 30. This wire twisting machine 3 is rotated by a drive motor 43 at a rotation speed set by a transmission 33.

The flange portion 32 holds a bobbin 40 around which the core wire 4 is wound.

Twist! On the downstream side of m1l13, there is a voice 7 held in a frame 70, and a capstan 8 for transferring the cargo-shaped m-wire 10 with a core wire.
and a winding drum 9 are arranged in sequence.

In the above ai, the hollow stranded wire 1 fed out from the bobbin 2
The wires are passed through the center tube 31 of the twisting machine 3 through the hole 22 of the support base 21, and are divided (untwisted) into 6 elements 1 (IA type wire 5) at the outlet of the wire, and are distributed around the wiring board 6. After passing through the hole, it is focused by voice 7.

In addition, wAl! Insert core wire 11 as #11! IC
If a wire is used, the core wire 11 is pulled out during the untwisting. Further, the core FA4 fed out from the bobbin 40 is fed into the center of the voice 7 through the center hole of the wiring board 6,
Here, it is twisted together with the special wire 5 to create a special wire 12 with 8FA!
An i-wire 10 is formed, which strand 10 passes through the capstan 8 to the winding drum 9 3!1! It is continuously wound.

The residual stress of the hollow stranded wire 1 can be reduced to 0 by increasing the twisting pitch by a predetermined amount, and the seedling can be determined in advance by experiment.

For example, cut the twisted wires with appropriate bits and
It is sufficient to set Ifl in a free state without constraining it and measure its pitch. Then, in the re-twisting after untwisting by the wiring board 6 and the voice 7, the twisting pitch is such that the residual stress becomes zero. That is, winding of twist 10 *
iv and the rotation of the twisting fd machine 3 by 31 degrees, I! The twisting pitch is set to a predetermined twist pitch of the threads 10.

In reality, the twisting pitch of the core wire strands 1110 that will become the finished product is determined from the product perspective, so the hollow strands 1 are pre-determined so that the residual stress becomes O by twisting to that pitch. Form to a known twist pitch of 1 J
j<. For example, in order to produce a stranded wire 10 with a residual stress of O by changing the twisting pitch to 135mm, the pitch of the hollow 1M wire 1 should be set to 125IIII, and this mai is fed into the stranding machine 3. Twisting machine 3 to 1o
Rotate with or, p, m, and wind up 31 degrees ■ for 135 m
mx100r, p.

m, -13.5 m/min. On this occasion,
Since the pitch of stranded wire 1 is 125+u+, wiring board 6
Accordingly, m twisted by y7 becomes 12.5 m/min, and therefore, the difference between the two, 1 m7 m + n, is adjusted to WJ by rotating the support base 21 in the opposite direction 8 times/min.

As a result, the deformed shape a5 twisted by the voice 7 is formed into a cylindrical shape with a residual stress of O, and a stranded wire 10 is formed in which the core wire 4 is inserted into the inside (hollow portion 50).

1 made as above! Since the residual stress of the surrounding deformed wire is O, the internal core wire of the heddle 10 is damaged during twisting in the voice 7 and by bending in the capstan 8 and winding drum 9. There is no fear that the core wire will fall, and therefore a hard wire with 1b such as an optical fiber can be used as the core wire.

(Effects of the Invention) As explained above, the present invention eliminates the twisting tendency of stranded wires and eliminates the risk of damaging the core wires.
44 can be used as a core wire.

[Brief explanation of the drawing]

FIG. 1 does not show an example of the apparatus for carrying out this invention, but the entire figure 1I
ff diagram, FIG. 2 is a cross-sectional view of the stranded wire during manufacture, and FIG. 3 is a 1lili cross-sectional view of the completed stranded wire. 1...Hollow stranded wire, 2...Bobbin, 3...Twisting machine,
4... Core wire, 5... Irregular wire, 7... Voice, 9...
... Winding drum, 10... Twisted wire with core wire.

Claims (1)

[Claims] 1. A hollow stranded wire is produced by twisting a plurality of irregularly shaped strands, and then the stranded wire is untwisted, and then a core wire having a diameter smaller than the diameter of the hollow portion is enclosed. A method for manufacturing a deformed stranded wire with a core, characterized in that the strands are re-twisted at a twisting pitch such that the residual stress becomes zero to form a deformed stranded wire with a core. 2. A stranded wire with a core wire is produced by twisting a plurality of irregularly shaped strands around the core wire, then the strands are untwisted and the core wire is removed, and then a core wire with a diameter smaller than the diameter of the above core wire is included. A method for manufacturing a deformed stranded wire with a core, characterized in that the strands are re-twisted at a twisting pitch such that the residual stress becomes zero to form a deformed stranded wire with a core.