JPH0821274B2 - Production equipment for compressed strand conductors - Google Patents

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, such a compressed stranded wire conductor is manufactured mainly by a single twist buncher or a cylindrical 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 twisting due to the mechanism. Although it is possible to improve the production efficiency by applying a well-known double-twisting wire machine to the production of a compression stranded wire conductor, it is possible to improve the production efficiency. There are problems and it is difficult to apply as it is. or,
As a device for manufacturing a compressed stranded wire conductor 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 new maintenance and management of the cooling device will be required. A problem arises. Further, it is pointed out that since the compression molding die is inside the double twisting and twisting machine, the workability during threading is poor.

Further, 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 Laid-Open No. 49366, 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 and twists the twisted wire, and at the same time, rotates about a rotation axis orthogonal to the rotation axis of the frame. Take up the wire. The capstan roller has conventionally been driven by a planetary gear mechanism because the rotation number for winding is much smaller than the rotation number of the frame and the capstan roller is in the rotating frame. Further, the capstan roller requires a large traction force to take up the twisted wire, and needs to be increased to some extent to have strength. For these reasons, the conventional device is large, complicated in structure, and expensive.
In addition, 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. 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 the 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 which enables high-speed rotation, and does not impair the production capacity of the double twisting and twisting machine and is inexpensive.

[Means for Solving the Problems] The present invention relates to a twisted end of a wire group.
Die and rotatably installed behind the twisting die
Compression molding machine and pretwisting machine provided behind the compression molding machine
And a take-up machine, provided behind the pre-twisting machine and the take-up machine,
It consists of a double twisting and twisting machine in which a winding bobbin is carried on a floating frame.
The pretwisting machine and the take-up machine are about twice as fast as the two-twisting machine.
In a manufacturing device for a compressed stranded conductor that rotates in the same direction
The rear side of the compression molding machine from the compression molding machine side.
And a hollow rotary shaft integrally provided with a take-up machine,
In the case of a pretwisting machine, a wing-shaped boss that is projected on the hollow rotary shaft in contrast
With a flyer, and in the above-mentioned take-up machine,
Coaxial with the hollow rotary shaft and rotatably mounted on the rotary shaft,
Take up the stranded wire sent from one of the flyers
Both of them are untwisted and twisted twice through the other flyer.
With a drum-shaped take-up capstan that feeds the twisting machine
And the take-up capstan as a flyer.
Pretwisting a continuously variable transmission that rotates in the same direction and at different speeds
And is provided outside the take-up machine.

According to the present invention,  Rigidity of the flyer accounts for a significant portion of the traction of the stranded wire.
Can bear  Continuously variable transmission does not affect the speed of the flyer
Therefore, only the winding speed can be changed.  Capstan miniaturization enables high-speed rotation
It  Since the center of rotation of the front twisting machine and the take-up machine are the same,
The relative displacement between the machine and the take-up machine does not occur.  Centering to make the center of rotation of the pretwisting machine and take-up machine the same
Work becomes easier.  The hollow rotary shaft is commonly used as the rotary shaft of the front twisting machine and the take-up machine.
Of the take-off machine Dedicated rotary shaft and its support mechanism
No need to provide.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing the embodiments. The accompanying drawings show a schematic plan view of the device of the invention. In the figure, the device of the present invention shows a plurality of wires W ₁ , W ₂ ... W.
_n twisting die 1, a compression molding machine 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 applied is in the configuration of the device A comprising 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 structure, 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 alcohol. 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, 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 publicly known structure, and the rear hollow rotary shafts are rotatably supported by machine frames 9a and 9b fixed to both rear ends of the take-up capstan 7. A pair of arcuate flyers 11 between 10a and 10b
, And both ends of the flyer 11 are supported by the spindle 12.
A floating frame 13 fixed to the machine frames 9a and 9b at a and 12b and held in a stationary state is installed, and a take-up bobbin 14 is placed on the floating frame 13. Furthermore, the rear hollow rotary shaft 1
Guide rollers 15a and 15b are provided at the flyer 11 mounting positions within 0a and 10b, 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 attached to the rear hollow rotary shaft 10b of the double twisted wire twisting machine B are explained. By driving _{2 the} rear hollow rotary shaft 10b is driven to rotate and at the same time the flyer 11 is rotated. Next, as the flyer 11 rotates, the rear hollow rotary shaft 10b and the rear hollow rotary shaft 10a on the opposite side are simultaneously rotated, and the rotational driving force thereof is the pulley N ₃ having the same diameter as the pulley N ₂ attached to the rear hollow rotary shaft 10a. Is transmitted to a pulley N ₄ attached to one end of a common rotary shaft 18 provided side by side in the same direction as the hollow rotary shaft 3. The pulley N ₄ is manufactured to have a diameter of about ½ of the pulleys N ₂ and N ₃ , and the common rotating shaft 18 has a diameter about twice as large as that of the hollow rotating shaft at the rear of the double twisting and twisting machine B. Rotated at speed. Common rotating shaft 18
A pulley N ₅ connected to the input shaft 20 of the continuously variable transmission 19 is provided in front of the output shaft 21 of the continuously variable transmission 19.
Is a pulley N provided on the bearing 6 of the take-up capstan 7.
₆ is connected to rotate the take-up capstan 7. or,
A pulley N ₇ is provided in front of the pulley N ₅ of the common rotary shaft 18.
Is provided, 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 with the wing-shaped flyer 5 and independently, it can be driven from the outside by the continuously variable transmission 19 at a rotation speed different from that of the flyer 5, thereby eliminating the need for a planetary gear mechanism. Therefore, the configuration becomes simple. Further, since the continuously variable transmission 19 does not affect the rotational speed of the flyer 5, only the winding speed of the take-up capstan 7 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.
Rear hollow rotary shaft 10a of twice twisted stranding machine B through _8, 1
It is rotated about twice as fast as 0b. The take-up capstan 7 includes a pulley N ₅ , a continuously variable transmission 19 and a pulley N _6.
Is rotated in the same direction as the rotation of the hollow rotary shaft 3 or the flyer 5 at a speed different by + α or −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 is 1000 rpm,
The rotation speed of the flyer 5 was 2000 rpm, and the twist pitch of the twisted wire was 20 mm / turn. Therefore, the twisting speed Vm /
mm is represented by V = {twist pitch mm × 2 degree twisting / twisting machine rpm rpm × 2} / 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 this 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, 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 strands is compression-molded in a concentric shape around the central strand when passing through the compression molding machine 4.

The compression molded stranded wire S is then fed to the flyer 5
After being pulled by the pulling capstan 7 that is rotated at the same direction and at a different speed at a high speed by the strong pulling force, the hollow rotating shaft 3 is guided through the guide rollers 8c and 8d at the tip of the flyer 5 and the guide roller 8e at the base. 2 through the hollow part of
The twisted and twisted wire machine B is sent to the hollow portion of the rear 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 twice-twisting machine B is guided by the guide roller 15
It is sent along with the flyer 11 of the double twisting and twisting machine B via a, and 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 a pretwisting machine, so that the twisted wire S is untwisted to 50% of the 100% twist when it exits the take-up capstan 7, and the guide roller When it exits 15b, it becomes a 100% twisted wire 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 half returned at the exit of the take-up capstan 7, and then 2
When it exits the guide roller 15b of the 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 untwisting and retwisting, compression is performed. Defect factors such as uneven twist, untwist, and wire tension imbalance contained in the conductor are corrected and removed.

In this case, according to the apparatus 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 the take-up capstan 7 and the flyer 5. It is obtained by rotating at a high speed that differs by α. Therefore, in the case of the apparatus of the present invention, the production rate of the compressed stranded conductor is the diameter of the take-up capstan ×
It becomes π × α.

The ratio of the rotational speed of the flyer 11 of the double twisting and twisting machine B to the rotational 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 made compact without causing a problem of insufficient strength. Moreover, since the continuously variable transmission does not affect the rotational 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 enabled high-speed rotation, improved production capacity, and reduced stranded wire manufacturing costs. Since the center of rotation of the front twisting machine and the take-up machine are the same,
Smooth without causing relative displacement between the machine and the take-off machine.
You can get the rotation. Centering to make the center of rotation of the pretwisting machine and take-up machine the same
Work becomes easier. The hollow rotary shaft is commonly used as the rotary shaft of the front twisting machine and the take-up machine.
Therefore, a dedicated rotary shaft of the take-up machine and its support mechanism are installed.
Since it is not necessary to provide the device, the device can be downsized.

[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 Rear Hollow Rotating Shaft 11 Flyer 13 Floating Frame 14 Winding Bobbin 19 Continuously Variable Transmission

Claims (1)

[Claims] 1. A twisting die for a group of strands, a compression molding machine rotatably installed behind the twisting die, and a pretwisting machine and a take-off machine provided behind the compression molding machine. A two-degree twisting and twisting machine provided on the back of the front twisting machine and the take-up machine and having a take-up bobbin carried on a floating frame. In a compression stranded wire conductor manufacturing apparatus that rotates in the same direction at twice the 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. , The pretwisting machine is constructed by a wing-shaped flyer symmetrically protruding from the hollow rotary shaft, and the take-up machine is hollow.
It is coaxial with the rotary shaft and is rotatably mounted on the rotary shaft. The twisted wire sent from one of the flyers is wound up, and the twisted wire is unwound and supplied to the double twisting and twisting machine through the other flyer. And a continuously variable transmission for rotating the take-up capstan in the same direction as the flyer and at different speeds are provided outside the front twisting machine and the take-up machine. Equipment for the production of compressed stranded conductors.