JPH05101728A - Production equipment for compressed strand conductors - Google Patents

Abstract

(57) [Abstract] [Purpose] The structure is simple and high speed rotation is possible.
To provide an apparatus for manufacturing a compressed stranded wire conductor at low cost without impairing the production capacity of the twisted twisting wire machine. [Structure] A hollow rotary shaft 3 is arranged behind a compression molding device 4, and a wing-shaped flyer 5 is symmetrically projected from the hollow rotary shaft 3. A drum-shaped take-up capstan 7 is mounted behind the flyer of the hollow rotary shaft so as to be rotatable coaxially with the rotary shaft.
The take-up capstan 7 is rotated by the continuously variable transmission 19 in the same direction as the flyer and at a different speed. The plurality of wire groups W ₁ , W _2, ... W _n exit the compression molding machine 4 and the hollow rotary shaft 3
And is sent to the take-up capstan 7 through one flyer. The take-up capstan 7 winds these strands while twisting them, unwinds the strands, and supplies them to the double-twisting machine B through the other flyer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a compressed stranded wire conductor of a type in which a plurality of strands are concentrically twisted around a center line.

[0002]

2. Description of the Related Art Conventionally, the production of such a compressed stranded wire conductor is mainly carried out by a single twist buncher or a tubular stranded wire machine. However, these twisting machines have a limit in improving the production efficiency because it is difficult to increase the rotation speed of the twisting due to the mechanism. Although it is possible to improve the production efficiency by applying a well-known double twisting and twisting machine to the production of the compression twisted wire conductor, it is possible to improve the production efficiency by so-called twist float formation, product defects, disconnection at the flyer, etc. There are problems and it is difficult to apply as it is. or,
As a device for manufacturing a compressed stranded wire conductor that has been proposed to solve these problems, there is, for example, the device disclosed in Japanese Utility Model Publication No. 57-31193 or Japanese Patent Publication No. 57-47317. However, in the device described in the former publication, the main compression molding die is arranged upstream of the internal take-up capstan of the double twisting and twisting machine, and the compression molding die is a twisted wire conductor. It needs to be cooled because it is heated by the friction of the
There is a great deal of difficulty in securing a space for installation inside the twisting and twisting machine, and if it is installed, the structure of the twisting and twisting machine will become large, and a new maintenance and management of the cooling device will be required. Problems arise. Further, it is pointed out that the compression molding die is inside the double twisting and twisting machine, so that the workability at the time of wire passing is poor.

In the latter device disclosed in Japanese Patent Publication No. 57-47317, a pretwisting and taking-up device is arranged upstream of a double twisting and twisting machine, and a capstan is provided in a frame of the pretwisting and takingup device. A roller is provided. Then, the frame normally rotates in the same direction as the rotation number N of the 2-degree twisting and twisting machine at a rotation number of (twice ± δ) N. The value of δ varies considerably depending on the material of the strands, the diameter of the strands, the number of strands to be twisted, the degree of circular pressure forming, and the number of revolutions of the double twisting and twisting machine. In Japanese Patent Publication No. 49369 / δ, δ = 0.2 to
A value of 0.8 is shown.

On the other hand, the capstan roller provided in the frame revolves around the rotation axis together with the frame to twist the twisted wire, and at the same time, rotates about the rotation axis orthogonal to the rotation axis of the frame and twists the twisted wire. Take up the wire. The capstan roller has conventionally been driven by a planetary gear mechanism because the number of rotations for winding is much smaller than the number of rotations of the frame and the capstan roller is in the rotating frame. Further, the capstan roller needs a large traction force to take up the twisted wire, and needs to have a certain amount of strength to have strength. For these reasons, the conventional device is large, complicated in structure, and expensive.
Moreover, as the size of the apparatus increases, the centrifugal force increases as the rotation increases, and the strength of the frame also becomes a problem, so there is a limit to speeding up and the production efficiency did not increase. Furthermore, since the continuously variable transmission changes both the rotational speeds of both the capstan roller and the frame, the twist pitch cannot be changed. Therefore, changing the twist pitch requires changing the gear ratio of the planetary gear mechanism, which is very time-consuming.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the problems of such a known apparatus for producing a compressed stranded wire conductor, and advantageously solves the above-mentioned various problems and has a simple structure and a pretwisting machine and take-up machine. The present invention has been made for the purpose of providing an apparatus for producing a compressed stranded wire conductor that enables high-speed rotation of the double twisted and twisted wire machine and does not impair the production capacity of the double twisted wire machine.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing embodiments. The accompanying drawings show a schematic plan view of the device of the present invention. In the figure, the device of the present invention shows a plurality of wires W ₁ , W _2, ...
_n twisting die 1, a compression molding device 4, a device A including a pretwisting machine and a take-up machine, a double twisting and twisting machine B, and a drive system for these devices. The part to be added is in the configuration of the device A including a pretwisting machine and a take-up machine.

That is, the compression molding device 4 is rotatably mounted on the front end of a hollow rotary shaft 3 which is rotatably supported by machine frames 2a and 2b fixed to both ends behind the twisting die 1. A pair of wing-shaped flyers 5 provided with bending portions 5a and 5b at the tips as a pretwisting machine are projectingly fixed to the hollow rotary shaft 3 located behind the compression molding machine 4 at symmetrical positions.
Further, as a take-up machine, a drum-like take-up capstan 7 is mounted on the outer circumference of the hollow rotary shaft 3 located behind the flyer 5 via a bearing 6.

In the above construction, the compression molding device 4 may be of a so-called die type having a molding hole 4a whose inner diameter gradually decreases along the central axis, and may be air or a refrigerant such as alcohols. The used cooling system can be installed.

Guide rollers 8a, 8e and 8b, 8c and 8d are attached to the inner wall of the hollow rotary shaft 3 corresponding to the base of the flyer 5 and the tip bending portions 5a and 5b of the flyer 5, respectively. And the take-up capstan 7 are rotated in the same direction and at different speeds by a drive system described later.

Next, the double twisting and twisting machine B has a well-known structure, and a hollow rotating shaft 10a is rotatably supported by machine frames 9a and 9b fixed to both rear end portions of the take-up capstan 7, respectively. And 10b, a pair of bow-shaped flyers 11 are bridged, and both ends of the flyers 11 have support shafts 12a, 1a.
A floating frame 13 fixed to the machine frames 9a and 9b at 2b and held in a stationary state is installed, and a take-up bobbin 14 is placed on the floating frame 13. Further, the hollow rotary shafts 10a, 10
The guide rollers 15a, 1
5b is provided, and a guide roller 16 is provided on the floating frame 13.

Next, an example of the drive system of the device of the present invention will be described. A pulley N ₁ attached to the output shaft 17 of the prime mover M and a pulley N ₂ attached to the hollow rotary shaft 10b of the double twisting and twisting machine B are explained. Hollow rotating shaft 1 by driving
The flyer 11 is rotated at the same time as 0b is rotationally driven. Next, as the flyer 11 rotates, the hollow rotary shaft 10a opposite to the hollow rotary shaft 10b is simultaneously rotated, and the rotational driving force thereof is the pulley N ₂ attached to the hollow rotary shaft 10a.
Is transmitted to a pulley N ₄ attached to one end of a common rotary shaft 18 arranged in the same direction as the hollow rotary shaft 3 via a pulley N ₃ having the same diameter as The pulley N ₄ is made to have a diameter of about ½ of the pulleys N ₂ and N ₃ , and the common rotating shaft 18 is rotated at a speed about twice that of the hollow rotating shaft of the double twisting and twisting machine B. A continuously variable transmission 19 is provided in front of the common rotary shaft 18.
Is provided with a pulley N ₅ connected to the input shaft 20, and the output shaft 21 of the continuously variable transmission 19 is connected to a pulley N ₆ provided on the bearing 6 of the take-up capstan 7 to rotate the take-up capstan 7. Let Further, a pulley N ₇ is provided in front of the pulley N ₅ of the common rotary shaft 18, and this pulley N ₇ is connected to a pulley N ₈ provided at the front part of the hollow rotary shaft 3. That is, since the take-up capstan 7 rotates concentrically and independently of the wing-shaped flyer 5, it can be externally driven by the continuously variable transmission 19 at a different rotation speed from that of the flyer 5, thereby eliminating the need for a planetary gear mechanism. So
Simpler configuration. Further, the continuously variable transmission 19 is a flyer 5
Since it does not affect the number of rotations, the take-up capstan 7
Only the winding speed of can be changed, and the twist pitch of the twisted wire can be freely set.

Next, the operation of the device of the present invention will be described.
First, the hollow rotary shaft 3 is set to the common rotary shaft 18 and the pulleys N ₇ , N by setting the drive system of the device of the present invention as described above.
Hollow rotary shafts 10a, 10b of the double twisting and twisting machine B through ₈
It is rotated about twice as fast as. Also, take-up capstan 7
Is + α in the same direction as the rotation of the hollow rotary shaft 3 or the flyer 5 via the pulley N ₅ , the continuously variable transmission 19 and the pulley N _6.
Or, they are rotated at different speeds by -α. Here, an example of each numerical value in the embodiment of the present invention is as follows. The number of rotations of the 2-degree twisting and twisting machine B was 1000 rpm, the number of rotations of the flyer 5 was 2000 rpm, and the twist pitch of the twisted wire was 20 mm / turn. Therefore, the twisting wire speed Vm / mm is V = {twisting pitch mm × 2 degrees twisting and twisting machine rotation speed rpm × 2} /
It is represented by 1000. From this, V = 40 m / min.

The diameter of the take-up capstan is 100 mm.
Assuming φ, the rotational speed difference between the flyer and the take-up capstan is α rpm α = (twisting wire speed m / min × 1000) / (capstan diameter mm × π) In this equation, the above twisting wire speed Vm / min = By substituting 40 m / min, the rotational speed difference α = 127 rpm is obtained.

In such a driving state, a plurality of wire group W
₁ , W ₂ ... W _n are passed through the twisting die 1 with the center wire W ₂ as the center, and further passed through the compression molding device 4. Next, the guide rollers 8a and 8b are passed through the hollow portion of the hollow rotary shaft 3.
Before being taken up by the take-up capstan 7 via the take-up capstan 7, the plurality of wires W ₁ , W ₂ ... W _n are finally twisted by the rotation of the flyer 5 in the twisting die 1 to the twisted wire. 100% twist is provided. Further, the group of wires is compression molded into a concentric shape around the central wire when passing through the compression molding device 4.

The compression molded stranded wire S is then fed to the flyer 5
The pulling capstan 7 which is rotated in the same direction and at a different speed at a high speed pulls it by its strong pulling force, and then through the guide rollers 8c, 8d at the tip of the flyer 5 and the guide roller 8e at the base, the hollow rotating shaft 3 2 through the hollow part of
The twisted and twisted wire machine B is fed to the hollow portion of the hollow rotary shaft 10a.
Since the traction force of the twisted wire is borne by the rigidity of the flyer 5 to a considerable extent, the take-up capstan 7 can be made smaller than before without worrying about insufficient strength. Thus, the twisted wire S sent to the double twisting and twisting machine B is sent along the flyer 11 of the double twisting and twisting machine B through the guide roller 15a.
It is wound on the winding bobbin 14 on the floating frame 13 via the guide rollers 15b and 16. In this case, the flyer 11 is rotated at about half the speed of the flyer 5 as the pretwisting machine, so that the twisted wire S exits from the take-up capstan 7 and the
It is unwound to 50% of the twist of 00%, and when it exits the guide roller 15b, it becomes a twisted wire of 100% again and is wound on the winding bobbin 14. That is, the twisted wire S, which is 100% twisted with the twisting die 1 as a fulcrum, is immediately pressure-formed by the compression molding device 4, and then the twisted wire is halved at the exit from the take-up capstan 7. At the exit of the guide roller 15b of the double twisting and twisting machine B, the same twist as that of the twisted portion is added again to retwist the original twisted wire S. In the process of this twisting and retwisting The defective factors contained in the compressed conductor, such as uneven twisting, untwisting, and wire tension imbalance are corrected and removed.

In this case, according to the device of the present invention, a great pulling force when pulling out the twisted wire S from the compression molding machine 4 is + α or − with respect to the rotational speed of the flyer 5 in the same direction as that of the take-up capstan 7. It is obtained by rotating at a high speed different by α. Therefore, in the case of the apparatus of the present invention, the production rate of the compressed stranded wire conductor is calculated by taking
It becomes π × α.

The ratio of the rotation speed of the flyer 11 of the double twisting and twisting machine B to the rotation speed of the flyer 5 as the pretwisting machine is not always constant because of the material and size of the conductors to be twisted together. It is necessary to empirically calculate and set the pulley diameters of the drive transmission system so that the optimum final twisted product can be obtained with the theoretical ratio of 1: 2 as a reference.

As described above, according to the present invention, the following effects can be obtained. The mechanism is simplified because the planetary gear mechanism is no longer needed. Since a large part of the pulling force of the stranded wire can be borne by the rigidity of the flyer, the capstan can be downsized without causing a problem of insufficient strength. Moreover, since the continuously variable transmission does not affect the rotation speed of the flyer, only the winding speed can be changed,
The twist pitch of the twisted wire can now be set freely. The miniaturization of the capstan facilitates high-speed rotation, improves production capacity, and reduces the manufacturing cost of stranded wire.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of a compressed stranded wire conductor manufacturing apparatus of the present invention.

[Explanation of symbols]

 1 Twisting Die 3 Hollow Rotating Shaft 4 Compression Molder 5 Flyer 7 Pull-up Capstan 10a, 10b Hollow Rotating Shaft 11 Flyer 13 Floating Frame 14 Winding Bobbin 19 Continuously Variable Transmission

Claims (1)

[Claims] 1. A twisting die for wire group, a compression molding machine rotatably installed behind the twisting die, a pretwisting machine and a take-off machine provided behind the compression molding machine, A two-twisting wire machine provided behind the front twisting machine and the take-up machine and having a take-up bobbin carried on a floating frame. In a manufacturing apparatus for a compression stranded wire conductor that rotates in the same direction at a double speed, a hollow rotary shaft integrally provided with a pretwisting machine and a take-up machine from the compression molding machine side is arranged behind the compression molding machine. In the pretwisting machine, it is configured by a wing-shaped flyer symmetrically protruding from the hollow rotary shaft, and in the take-up machine, the hollow rotary shaft is located behind the flyer and the rotary shaft is Coaxially and rotatably mounted, winding the twisted wire sent from one of the flyers and unwinding the twisted wire. And a take-up capstan in the form of a drum that feeds the twisting and twisting machine through the other flyer, and the take-up capstan rotates in the same direction as the flyer and at different speeds. Is provided outside the pretwisting machine and the take-up machine.