JPH039568B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for producing a compressed stranded conductor in which a plurality of wires are concentrically twisted around a center line.

Conventionally, the production of such compressed stranded wire conductors has mainly been carried out using single twist bunchers or cylindrical stranding machines. However, with these wire twisting machines, there is a limit to the improvement in production efficiency due to the mechanical difficulty of increasing the rotational speed of twisting. Furthermore, if a known double twisting machine is applied to the production of compressed stranded wire conductors, it is possible to improve production efficiency; There are problems and it is difficult to apply it as is. In addition, as a manufacturing device for compressed stranded wire conductors that has been proposed to solve these problems, for example,
There is an apparatus disclosed in the specification of Japanese Patent Publication No. 31193 or Japanese Patent Publication No. 57-47317. However, the device described in the former publication has a structure in which the main compression molding die is disposed upstream of the internal take-up capstan of the twice-twisting wire twisting machine, and this compression molding die is connected to the twisted wire conductor. Since it is heated by friction, cooling is required, and it would be quite difficult to secure space to install a dedicated cooling device for this purpose inside the double-twisting machine. The structure of the wire machine becomes larger, and new problems arise in terms of maintenance and management of the cooling device. Furthermore, it has been pointed out that the compression molding die is located inside the twice-twisting wire twisting machine, resulting in poor workability during wire threading.

In addition, the latter device described in Japanese Patent Publication No. 57-47317 has a pre-twisting/take-off device installed upstream of the double-twisting machine, and a capstan roller in the frame of this pre-twist/take-off device. It is arranged. The frame usually rotates in the same direction as the rotation speed N of the double twisting machine at a rotation speed of (2 times ±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 even the rotational speed of the double-twisting machine. Kosho 55
-49366 publication shows values of δ=0.2 to 0.8.

On the other hand, the capstan roller installed in the frame revolves around the rotation axis of the frame together with the frame, twists the stranded wire, and at the same time rotates around the rotation axis perpendicular to the frame rotation axis to twist the stranded wire. Wind it up. Conventionally, this capstan roller is driven by a planetary gear mechanism because the rotation speed for winding is very small compared to the rotation speed of the frame, and because it is located inside a rotating frame. . Furthermore, the capstan roller requires a large traction force in order to pull the stranded wire, and therefore needs to be made large and strong to some extent. For these reasons, conventional devices have been large in size, complicated in structure, and expensive. Moreover, increasing the size of the device is accompanied by an increase in centrifugal force due to increased rotation, and the strength of the frame becomes a problem, so there is a limit to how high the speed can be increased, and production efficiency has not improved. Furthermore, since the continuously variable transmission changes the rotational speed of both the capstan roller and the frame, it is not possible to change the twist pitch. Therefore, in order to change the twist pitch, it was necessary to change the gear ratio of the planetary gear mechanism, which was very time consuming.

In view of the problems of the known compression stranded conductor manufacturing apparatus, the present invention advantageously solves the above-mentioned problems, has a simple structure, and enables high-speed rotation of the pre-twisting machine and the pulling machine. The purpose of this invention is to provide an apparatus for manufacturing compressed stranded wire conductors at low cost without impairing the production capacity of the twice-twisted wire stranding machine.

The present invention will be explained below based on drawings showing embodiments.

The accompanying drawings show a schematic plan view of the device according to the invention.
In the figure, the device of the present invention has a plurality of wires W ₁ , W ₂ . . .
A device A consisting of a W _o twisting die 1, a compression molding machine 4, a pre-twisting machine and a take-off machine, and a double-twisting machine B
The apparatus of the present invention is characterized by the structure of apparatus A consisting of a pre-twister and a take-up machine.

That is, the compression molder 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 at both ends behind the twisting die 1. A pair of wing-shaped flyers 5 having bent portions 5a and 5b at their tips as a pre-twisting machine are protruded and fixed at symmetrical positions on a hollow rotary shaft 3 located at the rear of the compression molding machine 4. A drum-shaped take-up capstan 7 is attached to the outer periphery of a hollow rotating shaft 3 located at the rear of the fryer 5 via a bearing 6.

In the above configuration, the compression molding machine 4 can be of a so-called die type having a molding hole 4a whose inner diameter gradually decreases along the central axis.
A cooling device using air or a refrigerant such as alcohol can be attached to this.

Also, a hollow rotating shaft 3 corresponding to the base of the fryer 5
and the bent end portions 5a and 5b of the flyer 5.
Guide rollers 8a, 8e, 8b, 8c, and 8d are respectively attached to the flyer 5 and the take-up capstan 7, and the flyer 5 and take-up capstan 7 are rotated in the same direction but at different speeds by a drive system to be described later.

Next, the twice-twisting wire twisting machine B has a known structure,
A pair of arcuate flyers 11 is suspended between hollow rotating shafts 10a and 10b which are rotatably supported by machine frames 9a and 9b fixed to both rear ends of the take-up capstan 7, respectively. Inside, both ends are support shafts 12a, 12b, and machine frames 9a, 9b, respectively.
A floating frame 13 fixed to and held in a stationary state is installed, and a winding bobbin 14 is placed on this floating frame 13. Further, guide rollers 15a, 1 are installed at the positions where the flyer 11 is installed inside the hollow rotating shafts 10a, 10b.
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. Pulley N ₁ attached to the output shaft 17 of the prime mover M drives pulley N ₂ attached to the hollow rotating shaft 10b of the twice-twisting wire twisting machine B. As a result, the fryer 11 is rotated at the same time as the hollow rotary shaft 10b is driven to rotate. Next, as the flyer 11 rotates, the hollow rotating shaft 10b and the opposite hollow rotating shaft 10a are simultaneously rotated, and the rotational driving force is transmitted through a pulley _N3 having the same diameter as the pulley _N2 attached to the hollow rotating shaft 10a. The signal is transmitted to a pulley N ₄ attached to one end of a common rotating shaft 18 arranged in the same direction as the hollow rotating shaft 3 . This pulley N ₄ is made to have a diameter that is about half that of the pulleys N ₂ and N ₃ , and the common rotating shaft 18 is rotated at about twice the speed of the hollow rotating shaft of the double-twisting machine B. Common rotation axis 18
A pulley _N5 connected to the input shaft 20 of the continuously variable transmission 19 is provided in front of the continuously variable transmission 19.
The output shaft 21 of is connected to a pulley N ₆ provided on the bearing 6 of the take-up capstan 7, and rotates the take-up capstan 7. Further, a pulley N ₇ is provided in front of the pulley N ₅ of the common rotating shaft 18, and this pulley N ₇ is connected to a pulley N ₈ provided in the front of the hollow rotating shaft 3. That is, since the take-up capstan 7 rotates concentrically with and independently of the wing-shaped flyer 5, it can be driven from the outside by the continuously variable transmission 19 at a different rotational speed than the flyer 5, thereby causing the planetary gear mechanism to rotate. Since this is not necessary, the configuration becomes simpler.

Furthermore, 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 stranded wire can be freely set. .

Next, the operation of the device of the present invention will be explained.

First, by setting the drive system of the device of the present invention as described above, the hollow rotating shaft 3 is connected to the hollow rotating shafts 10a, 10b of the twice-twisting wire twisting machine B via the common rotating shaft ₁₈ and the pulleys N7, _N8 . It rotates twice as fast. Further, the take-up capstan 7 rotates +α or - in the same direction as the rotation of the hollow rotating shaft 3, that is, the flyer ₅ , via the pulley _N5 , the continuously variable transmission 19, and the pulley N6.
are rotated at different speeds by α. Here, an example of each numerical value in an example of the present invention is as follows. The rotation speed of twice-twisting wire twisting machine B is 1000 rpm.
The rotation speed of the flyer 5 was set to 2000 rpm, and the twist pitch of the twisted wire was set to 20 mm/turn. Therefore, the twisting speed
Vm/mm is V=
It is expressed as twist pitch mm x 2-degree twisting machine rotation speed x 2/1000. From now on, V=40m/min.

Also, if the diameter of the take-up capstan is 100 mmφ, the difference in rotational speed between the flyer and the take-up capstan is α rpm: α = Stranding speed m/min x 1000 / Capstan diameter mm x
π By substituting the above-mentioned twisted wire speed Vm/min=40 m/min into this equation, the rotational speed difference α=127 rpm is obtained.

In such a driving state, a plurality of wire groups W ₁ ,
W ₂ . . . W _o is passed through the twisting die 1 with the central strand W ₂ as the center, and further passed through the compression molder 4. Next, a plurality of strands W ₁ , W ₂ , .
W _o is the twist that is finally imparted to the twisted wire in the twisting die 1 due to the rotation of the flyer 5.
100% twist is given. Further, when the wire group passes through the compression molder 4, it is compressed into a concentric circular shape around the center wire.

The compression-molded stranded wire S is then taken by a strong pulling force by a take-up capstan 7 that rotates at high speed in the same direction as the flyer 5 but at a different speed, and is then taken over by guide rollers 8c and 8d at the tip of the flyer 5.
and the hollow rotating shaft 3 via the guide roller 8e at the base.
The wire is sent to the hollow rotating shaft 10a of the twice-twisting wire twisting machine B via the hollow section. Since a considerable portion of the pulling force of the stranded wire is borne by the rigidity of the flyer 5, the take-up capstan 7 can be made smaller than before without worrying about insufficient strength. The stranded wire S thus sent to the twice-twisting wire twisting machine B is sent along with the flyer 11 of the twice-twisting wire twisting machine B via the guide roller 15a, and is sent to the floating frame 13 via the guide rollers 15b and 16. It is wound onto the upper winding bobbin 14.
In this case, since the flyer 11 is rotated at about half the speed of the flyer 5 as a pre-twisting machine, the stranded wire S is untwisted to 50% of the 100% twist when it leaves the take-up capstan 7. When the wire leaves the guide roller 15b, it becomes a 100% twisted wire again and is wound onto the winding bobbin 14. That is, the stranded wire S, which is 100% twisted using the twisting die 1 as a fulcrum, is immediately thereafter circularly formed in the compression molder 4, and when it exits the take-up capstan 7, half of the twist is returned, and then When the wire exits the guide roller 15b of the multi-twist wire twister B, the same amount of twist as the untwisted wire is added again and the original twisted wire S is re-twisted.
In the process of untwisting and retwisting, defective factors such as uneven twisting, untwisting, imbalance of wire tension, etc. contained in the compressed conductor are corrected and removed.

In this case, according to the apparatus of the present invention, the large traction force when pulling out the stranded wire S from the compression molding machine 4 causes the take-off capstan 7 to move in the same direction as the flyer 5 and
It is obtained by rotating at a high speed that differs by +α or -α from the rotation speed of . Therefore, the production rate of the compressed stranded wire conductor, when using the apparatus of the present invention, is the diameter of the take-up capstan x π x α.

Note that the ratio between the rotational speed of the flyer 11 of the double-twisting wire twisting machine B and the rotational speed of the flyer 5 as the pre-twisting machine is not necessarily constant depending on the material, size, etc. of the conductors to be twisted, so it is not the theoretical ratio. It is necessary to empirically calculate and set the diameter of each pulley in the drive transmission system based on the ratio of 1:2 in order to obtain the optimum final twisted product.

As explained above, according to the present invention, the following effects are achieved.

The mechanism became simpler because a planetary gear mechanism was no longer needed.

Since a considerable part of the pulling force of the stranded wire can be borne by the rigidity of the flyer, the capstan can be made smaller without having to worry about insufficient strength.

Furthermore, since the continuously variable transmission does not affect the rotational speed of the flyer, only the winding speed can be changed, and the twist pitch of the stranded wire can now be freely set.

The miniaturization of capstans has made it easier to rotate at high speeds, increasing production capacity and reducing manufacturing costs for stranded wire.

[Brief explanation of drawings]

The drawing is a schematic plan view showing one embodiment of the compressed stranded wire conductor manufacturing apparatus of the present invention. 1... Twisting die, 3... Hollow rotating shaft, 4...
Compression molding machine, 5...flyer, 7...take-up capstan, 10a, 10b...hollow rotating shaft, 11...
... Flyer, 13... Floating frame, 14... Winding bobbin, 19... Continuously variable transmission.

Claims (1)

[Scope of Claims] 1. A twisting die for a group of strands, a compression molding machine rotatably installed behind the twisting die, and a pre-twisting machine and a take-off machine installed behind the compression molding machine. and a twice-twisting wire twisting machine provided behind the pre-twisting machine and the take-up machine, and having a winding bobbin supported on a floating frame,
In a compression stranded wire conductor manufacturing apparatus in which the pre-twisting machine and the pulling machine rotate in the same direction at about twice the speed of the double-twisting machine, the pre-twisting machine and the pulling machine are located behind the compression molding machine. A hollow rotating shaft provided integrally, a wing-shaped flyer projecting symmetrically rearward from the compression molding machine of the hollow rotating shaft, and a wing-shaped flyer mounted coaxially and rotatably with the hollow rotating shaft at the rear of the flyer. and a drum-shaped take-up capstan that winds up the stranded wire sent out from one of the flyers, unwinds the stranded wire, and supplies it to the twice-twisting wire twisting machine via the other flyer. 1. An apparatus for producing compressed stranded wire conductors, characterized in that a continuously variable transmission that rotates in the same direction as the flyer and at a different speed is provided outside the pre-twisting machine and the take-off machine.