JPS5948498B2 - Stranded wire manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing stranded wires for, for example, electric cables, and more particularly to an apparatus for manufacturing stranded wires by combining a wire drawing machine and a stranding machine in tandem on the same line. It is.

In order to reduce the number of processes for the purpose of lowering the manufacturing cost of electric cables, a stranding manufacturing device has been proposed in which a multi-strand wire drawing machine and a buncher-type stranding machine are tandemly combined on the same line (for example, (See Publication No. 55-141352).

However, with this type of stranded wire manufacturing equipment, slips may occur unevenly due to variations in the machine finish, and the pulling force from the stranding machine may become uneven, causing problems between the wire drawing machine and the stranding machine. Since the tensions are not always equal, for example, in the case of 7-strand twisting, if the tension between the wire entering the center and the outer layer is not balanced, the center wire will protrude or become thinner during twisting, making it difficult to operate stably for a long time. I can't. Furthermore, if the tension of the wires constituting the outer layer is not constant, the twisting pattern will be irregular, making it impossible to manufacture high-quality stranded wires. An object of the present invention is to provide a stranded wire manufacturing device that can operate stably for a long time by keeping the tension of the wire rod between a wire drawing machine and a stranding machine constant, and can obtain high quality stranded wire. It's about doing.

Embodiments of the present invention will be described in detail with reference to the drawings.
The figure schematically shows a stranded wire manufacturing apparatus according to the present invention, which comprises a multi-strand wire drawing machine 12 which is tandemly combined on the same line.
and a bunchier-type wire twisting machine 14, and in the illustrated embodiment, after seven wire rods (strands) 10 exit the wire drawing machine 12, the wire twisting machine 14 twists six wire rods around one center line. Twisted wire is produced by twisting the outer layer wires of books.

Between the wire drawing machine 12 and the wire twisting machine 14, there is a dancer roll 1 for each wire rod for the purpose of detecting the tension of each wire rod as described later.
6 is provided. This dancer roll 16 consists of two fixed guide rolls 18, 18' as shown in FIG.
and a movable guide roll 20 provided therebetween, and each wire 10 passes through a fixed guide roll 18, a movable guide roll 20, and a fixed guide roll 18'. As partially shown in FIG. 2, the wire drawing machine 12 is formed by arranging a plurality of wire drawing dies 22 and a plurality of capstans 24 alternately in a straight line for each wire rod.

In the illustrated embodiment, an auxiliary guide roll 26 is provided near the final capstan 24A, and each wire 10 has a 0.5
It is designed to allow extra turns to be wrapped. Therefore, each wire 10 can be wound using this auxiliary guide roll 26 in 1.5 turns, 2.5 turns, 3.5 turns, etc. to adjust the tension. Although not shown in detail, the wire twisting machine 14 is formed by housing a winding machine in a cage, and the plurality of wire rods 10 pass through a twisting cap on the rotation axis of the cage and pass through the cage in an arcuate manner. At the end of the bow, it is reversed and passed through a guide roll on the axis of rotation, and then wound into a winder.
At this time, the plurality of wire rods 10 are twisted twice. The apparatus of the present invention includes a winding angle variable means 28 that changes the winding angle of the wire wound around each final capstan 24A of the wire drawing machine 12, and a wire drawing machine 12.
and a tension detector 30 for detecting the tension of the wire rods 10 between the wire twisting machine 14 and the wire twisting machine 14, and the winding angle variable means 28 adjusts the tension of all the wire rods 10 according to the tension signal from the tension detector 30. It is controlled to be constant.

In the illustrated embodiment, the winding angle displacement means 28 includes a pair of winding rollers 32, 32 disposed on a circumference centered on the rotational axis of the final capstan, close to the wire 10 emerging from the final capstan 24A. These winding rollers 32, 32'' are provided with a rotational displacement mechanism 3 so that they can be rotationally displaced around the rotational axis of the final capstan.
It is supported by 4. As shown in FIGS. 6 and 7, this rotational displacement mechanism 34 is a shaft that is displaced at a predetermined rotational angle in response to a tension signal. The support member 4 is driven by a drive source 42 such as a pulley or a gear transmission means 44 such as a pulley or gear.
It consists of 6. The support member 46 supports the winding rollers 32, 32'' via arms 48, and the winding rollers 32, 32'' are supported around the central axis of the final capstan 24A.
(see Figure 7). As shown in FIG. 3, the tension detector 30 is a rotation angle sensor 40 connected to one of two sprockets 38, 38'' over which a chain 36 connected to the movable guide roll 20 of the dancer roll 16 is spanned. As the tension of the wire rod 10 increases or decreases, the movable guide roll moves to 20A, 2
In response to the displacement in the direction of 0B, the sprocket 38''
rotates, so the rotation angle sensor 40 generates an angle signal (tension signal) proportional to the tension. Control circuit 40 in FIG.
In response to these tension signals, the drive sources 42 of the winding angle variable means 28 are respectively driven so that the tension of all the wire rods 10 is constant. Therefore, when the tension in one wire rod 10 is increased, the tension signal drives the drive source 42 to produce the signals shown in FIGS. 2B and C.
As shown in FIG. 2, the winding angle variable means 28 is moved clockwise in FIG. 2 to increase the winding angle of the wire rod 10, reduce the slip between the wire rod 10 and the final capstan 24A, and feed the wire rod 10 with the capstan. In this way, the tension in the wire is reduced.

FIG. 5 shows an example of a state in which each of the winding angle variable means 28 is displaced so that the seven wire rods 10 are maintained at a constant tension. According to the present invention, as described above, the tension of the wire sent out from the wire drawing machine is constant, so the wire drawing machine and the wire twisting machine are synchronized, and therefore, when the wire is twisted, a part of the wire sticks out. This has the practical benefit of being able to operate the machine stably without causing the wire to become thinner or thinner, and to obtain high-quality stranded wire with a good twisting shape.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the stranded wire manufacturing apparatus of the present invention, Fig. 2 A to C are schematic diagrams of main parts of the present invention in different operating states, and Fig. 3 is a schematic diagram of a tension detector used in the present invention. , FIG. 4 is a system diagram of the control circuit, FIG. 5 is a schematic diagram showing an example of the operation of the present invention, and FIGS. 6 and 7 are longitudinal sectional views and front views of the winding angle variable means used in the present invention. It is a diagram. 10...Wire rod, 12...Wire drawing machine, 14
......Twisting machine, 24A...Final capstan, 28...Wrap angle variable means, 30...
...Tension detector, 40... Control circuit.

Claims (1)

[Claims] 1 Consists of a multi-strand wire drawing machine and a bunchier-type wire twisting machine combined on the same line, and after drawing a plurality of wire rods with the wire drawing machine, the wires are continuously twisted by the said wire twisting machine. In the stranded wire manufacturing apparatus, a winding angle variable means for varying the winding angle of the wire wound around each final capstan of the wire drawing machine, and a tension of the wire between the wire drawing machine and the stranding machine are detected. A stranded wire manufacturing apparatus further comprising a tension detector, wherein the winding angle variable means is controlled in accordance with a tension signal from the tension detector so that all the wires have a constant tension.