JP2001055678A - Double twisting strander - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact double twisting strander capable of saving energy, having a high productivity and readily carrying out even the inspection of wire breakage. SOLUTION: This double twisting strander is obtained by installing a stranding machine body 1 in the form provided with cuplike disks 15 arranged at a short interval in an opposite form on both sides of a cradle 9 equipped with a winding bobbin 10 installed therein and further directly delivering wires thereto, a high-speed rotation torque regulator 2 arranged on the upstream side of the stranding machine body 1 and capable of forcedly twisting a wire bundle led from supply bobbins prior to the introduction of the wire bundle into the stranding machine body 1 and a speed changing mechanism 4 for decelerating the rotation torque applied to the stranding machine body 1 once, finely adjusting the number of revolutions in this state and then increasing the number of revolutions thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double twisted wire machine for producing a steel cord and the like, and particularly to a large double twisted wire machine having a high energy saving effect.

[0002]

2. Description of the Related Art Steel cords are produced by twisting a plurality of steel wires. As this means, as described in JP-A-48-67522, a bow (guide pipe or ladder-like body) having a gentle curve similar to a catenary curve is suspended between a pair of disks having hollow shafts at both ends. The wire bundle is guided along the bow from the hollow shaft at one end through the first turn roll, and guided into the cradle through the second turn roll from the vicinity of the hollow shaft at the other end, twisted twice and mounted on the cradle The rotating torque of the cord was adjusted by the over twister, and the cord was wound around a winding bobbin in the cradle.

However, in such a structure, the first
The bow is used as a cord guide from the turn roll to the second turn roll to prevent swelling due to the centrifugal force of the strand, so energy loss occurs due to air resistance due to the presence of the bow, and thus twisting It is necessary to use a large motor as a power source for rotating the wire machine main body, and there is a problem that power consumption increases. Moreover,
As the bow rotates, the load generated by the centrifugal force is applied to the hollow shafts at both ends and generates heat, so energy loss also occurs here, and it is necessary to equip a shaft cooling fan to improve this. As a result, there has been a problem that energy consumption is increasing.

As a countermeasure, a twisting machine of a type in which the bow between the disks is omitted has been proposed. In such prior art, in addition to a winding bobbin, a traverse, a leveling roll, and the like, the above-mentioned over twister is mounted. ing. For this reason, the weight is heavy, and the overtwister occupies a large proportion in the limited space inside the cradle. Therefore, if the capacity of the winding bobbin is increased, the entire apparatus becomes large. As a result, it becomes difficult to set the interval between the pair of disks to an appropriate interval that can suppress the cord from bulging to the outside due to centrifugal force, and the interval between the pair of disks must be increased. In addition, the occurrence of disconnection and the like increases due to the application of a strong tension to the cord for preventing the cord from bulging, which causes a problem that the yield of non-defective products and the productivity are reduced. Also, in the prior art, since the most twisted portion of the cord is in the cradle portion, it is not easy to determine whether the wire or cord is broken, and even if a sensor is attached as a countermeasure, it must be placed inside the rotating body. Therefore, it is difficult to transmit the detection information, and there is a problem that it is difficult to improve the accuracy.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a compact and energy-saving device which has high productivity. Another object of the present invention is to provide a two-ply twisting wire machine that can easily inspect the presence or absence of a break.

[0006]

According to the present invention, a cup-shaped disk is provided on both sides of a cradle on which a winding bobbin is arranged in a short span so as to face each other, and a wire is directly passed between the disks. A twisting machine main body, a high-speed rotation torque adjusting device forcibly twisting a strand bundle guided from a supply bobbin disposed upstream of the twisting machine main body before introducing the strand bundle into the twisting machine main body, A transmission mechanism for temporarily reducing the rotational torque applied to the machine body, finely adjusting the rotational speed in this state, and then increasing the speed. The span L of the disk is 0.8 to 0.8 of the diameter D of the disk.
It is preferably 1.15 times.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 5 show an embodiment of a double twist twisting machine according to the present invention. A main body 3 for driving and rotating the twisting machine main body 1; a high-speed rotation torque adjusting device 2 installed outside the twisting machine main body 1; And a transmission mechanism 4. Upstream of the high-speed torque adjusting device 2, a voice 5, a head plate 6, and a tension control device 7 are arranged in the same manner as in a known double-twisting wire machine.
A supply stand 8 having a plurality of supply bobbins 8a, 8b, 8c is installed at the most upstream.

First, the twisting machine main body 1 has a cradle 9 as shown in FIGS. The cradle 9 has a pair of circular end plates 90, 90 and beam members 91, 9 connecting the end plates 90, 90.
A large winding bobbin 10 having a Franch diameter of, for example, 500 mmφ or more is rotatably supported at a substantially central portion of the cradle 9. In the vicinity of the winding bobbin 10, a traverse 11 for orderly winding a finished cord or rope (hereinafter abbreviated as a cord) is arranged, and on a path for the traverse 11, guide rolls 12,
12 ', leveling roll 13, capstan 14 for adjusting cord take-up speed and introduction guide roll 29
And are arranged. However, the cradle 9 is not provided with a torque adjusting device such as an over twister such as a conventional twisting machine of this type.

Further, the twisting machine main body 1 is provided with the cradle 9
A pair of discs 15, 15 having a cup-shaped or bowl-shaped cross section is provided on both sides of the disk 15, and hollow shafts 16, 16 'are fixed to the centers of the bottoms of the discs 15, 15. The cradle 9 has the end plates 90, 90 having the hollow shaft 1
By being coupled to bearings 162, 162 'provided coaxially with the shafts 6, 16', the hollow shaft and the disc are suspended in a rim-shaped manner with the rotation of the disk. The rotation of the hollow shafts 16 and 16 ′ is transmitted to the winding bobbin 10 by a transmission mechanism (not shown). The disks 15, 15 are formed in an arc shape so as to guide the wire bundle W at a gentle angle, and guide pieces 150, 151 for guiding the wire bundle W are attached to the outside and the opening of the bottom. The strand bundle W is directly stretched between the disks 15, 15 through the intermediary of the wire bundle W.

Therefore, no conventional bow is stretched between the disks 15, 15, and the wire bundle W
Also, there is no line connecting member for rotational balance at the position where the disk passes through and the position facing the center of the disk. In the present invention, the distance (span) L between the pair of disks 15 is shortened. For this reason, a device for torque adjustment such as an over twister is not provided in the cradle 9 as described above. Specifically, the interval (span) L between the disks 15, 15 is
0.8 ≧ L / D ≧ 1.1 in relation to the diameter D of 15
It is preferably set to 5.

This is what the present inventors have found through experiments. If L / D is larger than 1.15, the strand swells greatly due to the centrifugal force. This is because it is necessary to increase the tension, and as a result, disconnection or the like is likely to occur, and the quality of the product deteriorates. On the other hand, when L / D is smaller than 0.8, the internal arrangement space becomes narrower, and the winding bobbin 10
This is because it is not possible to increase the capacity of the device.

The hollow shafts 16 and 16 'are rotatably supported at their ends by hollow bearings 17 and 17 provided on supports f and f, as shown in FIG. Is the first turn roll 18 and the hollow shaft 1 on the downstream side.
A second turn roll 19 is provided at 6 '. FIG.
As shown in the figure, the first turn roll 18 has a tapered cone-shaped body, and the second turn roll 19 has a drum-like shape, and the whole thereof has a required angle of, for example, 15 degrees with respect to the axis of the hollow shaft.
It is attached so that it is inclined about °.

In the conventional apparatus, the over twister is provided in the twisting machine main body as low-speed rotating torque adjusting means, but in the present invention, the high-speed rotating torque adjusting device 2 is provided upstream of the twisting machine main body 1. , Functions as a high-speed overtwisting means for positively twisting the strand before twisting. The high-speed rotation torque adjusting device 2 may have any mechanism as long as it can apply an excessive amount of twist to the wire bundle and release the same amount of twist, but in this embodiment, a type using one set of rolls is used. Use something. That is, as shown in FIG. 4 and FIG. 5, there is provided a cylindrical frame 2a composed of both end plates 20, 20 and frame plates 21, 21 connecting them.
Is supported and fixed by an abutment f.

The cylindrical frame 2a has a cylindrical holder (cylinder) 2b disposed therein. The hollow shafts 22, 22 at both ends of the cylindrical holder 2b are rotatably mounted on the cylindrical frame 2a by bearings. It is supported. The hollow shaft 22, 2
A pulley 220 is fixed to one of the two. And
Support shafts 23 and 24 are mounted on the cylindrical support 2b at predetermined intervals in the front and rear directions and at right angles to the axis of the cylindrical support, and a pair of support shafts 23 and 24 is provided on each of the support shafts 23 and 24. Rolls 2c and 2d are rotatably mounted via bearings. The rolls 2c and 2d have grooves in the cylindrical holding body 2.
It is inclined at a required angle with respect to the horizontal as a whole on the axis of b.

Pulleys 160 and 161 are fixed to the ends of the hollow shafts protruding from the hollow bearings 17 of the twisting machine main body 1, respectively. On the other hand, the supports f, f
The main motor 3 is fixedly mounted on the base g. A pulley paired with the pulleys 160 and 161 is provided on the output shaft 30 of the main motor 3. , 301 are rotated so that the twisting machine main body 1 is rotated.
A hydraulic lifter (not shown) is mounted on the base g to raise and lower the winding bobbin 10.

A transmission mechanism 4 is fixedly mounted on the base g at a position substantially directly below the high-speed rotation torque adjusting device 2. The transmission mechanism 4 converts the rotation transmitted from the output shaft 30 of the main motor 3 to, for example, 2000 rpm.
A deceleration pulley or gear (hereinafter, referred to as a deceleration pulley) 4a for decelerating below, a precision transmission 4b for finely adjusting the rotation of the deceleration pulley 4a, and a rotation speed suitable for over-twisting the output of the precision transmission 4b, And a speed-increasing pulley or gear (hereinafter referred to as speed-increasing pulley) 4c for increasing the speed of the twisting machine main body 1 to 2.3 to 3.3 in general.

The precision transmission 4b is interposed between the deceleration pulley 4a and the speed-increasing pulley 4c because fine adjustment of the number of revolutions for setting an optimum code kill for manufacturing under a high-speed number of revolutions is a usual operation. This is because transmissions are extremely difficult and reproducibility is poor. That is, for example, about 8000 rpm
At 8010r to change the code kill once / 6m
To achieve pm, fine adjustment of 0.1% is required. Accordingly, the high-speed rotation torque adjusting device 2 is a continuously variable transmission type and can achieve a rotation fluctuation rate of ± 0.1% or less.
It is preferable that the fine adjustment can be performed in the range of 20 to 30 rpm in pm. FIG. 6 schematically shows an example of the precision transmission 4b, in which the output shaft 40 of the reduction pulley 4a is connected to the input shaft, and the output shaft 41 is guided to the speed increasing pulley 4c. The belt 400 is wound around the pulley fixed to the directly connected shaft and the pulley 220 of the high-speed rotation torque adjustment device 2, so that the finely adjusted high-speed rotation torque is transmitted to the cylindrical holder. .

The precision transmission 4b includes a sun cone 42 connected to the input shaft 40, a planetary cone 43 combined with the sun cone 42 and having a conical outer periphery, and a differential cone having a cone in contact with the planetary cone 43. A shaft 44, a sun gear 45 fixed to the input shaft end, a planet gear 46 meshing therewith, and an output gear 47 on the opposite side of the sun gear and coupled to the output shaft 41; A ring 48 for gear shifting operation is movably fitted on the surface.

In this example, the output of the deceleration pulley 4a, for example, 1000 to 1800 rpm is an output shaft (input shaft).
The light is transmitted from 40 through a sun cone 42 and a planetary cone 43 to a differential shaft 44, and the output shaft 41 is transmitted to a sun gear 45. Both powers cause the planetary gear 46 to rotate and revolve via the differential shaft 44 and the sun gear 45, and the combined power is transmitted to the output shaft 41 and output to the output shaft 41. Therefore, when the ring 48 is moved along the planetary cone 43 by a manual handle or a motor, the planetary cone 4
3, the effective diameter of contact with the ring changes, and the output rotation speed can be minutely changed.
It is possible to give a precise rotation speed suitable for code killing.

[0020]

Next, the operation of the embodiment will be described. A plurality of wires, for example, three to five wires, each of which is a supply bobbin 8
The tension is adjusted by the tension control device 7 and guided to the high-speed rotation torque adjustment device 2 through the end plate 6 and the voice 5. In this high-speed rotation torque adjusting device 2, the wire bundle passes through the side of the first roll 2c of the cylindrical holder 2b, and is wound around the first roll 2c via the second roll 2d. Is wound several times in a figure 8 shape, and finally the cylindrical frame 2a passes from the first roll 2c to the side of the second roll 2d.
Is derived to the outside.

Next, the strand bundle is the hollow shaft 1 of the twisting machine main body 1.
7, the first turn roll 18, and the disc 1
5 is guided through the guide pieces 150 and 151 and is hung over the opposing disk 15 to guide the pieces 150 and 15.
1 through the second turn roll 19 of the hollow shaft 16 ′, and is guided to the cradle 9 through the hollow shaft 16 ′. In the cradle 9, the guide roll 29 is wound around the capstan 14 several times, then is wound again on the capstan 14 via the leveling roll 13 and then again on the traverse 11 via the guide rolls 12 'and 12. The traverse 11 guides the finished cord around the winding bobbin 10.

The rotation of the main motor 3 is controlled by pulleys 160 and 161.
Is transmitted to the hollow shafts 17, 17 via the belts 300, 301, whereby the disks 15, 15 rotate. On the other hand, the rotation of the main motor 3 is transmitted to the deceleration pulley 4a to be decelerated, and its output is transmitted to the speed-increasing pulley 4c via the precision transmission 4b, where the rotation speed of the disks 15, 15 is 2.3 to 2.3. 3.3 high-speed rotation torque adjusting device 2
Is rotated at high speed in the same direction as the rotation of the twisting machine main body 1 together with the first and second rolls. For this reason, the strand bundle passing through the voice 5 is forcibly twisted excessively. For example, assuming that the number of rotations of the disks 15 and 15 is N, a twist of 2N + α is applied by the high-speed rotation torque adjusting device 2 and the twist is permanently set to a small twist pitch. The wire bundle in such a state is subsequently supplied to the first turn roll 1 of the twisting machine main body 1.
8 through the second turn roll 19, in principle, the twisting of α is performed, the take-up speed is determined by the capstan 14, the straightening is corrected by the leveling roll 13, and the winding is performed by the traverse 11. It is wound up on the take-up bobbin 10.

FIG. 7 shows the twisting mechanism of the present invention. When the twisting mechanism is twisted to the point b on the entrance side of the high-speed rotation torque adjusting device 2 and there is no twist-back at the entrance of the first turn roll 18, After the rotation torque adjusting device 2 is returned to c1 at the position of the entrance of the first turn roll 18. After that, twisting occurs in the twisting machine body, and the product has a negative torque. Here, the “twist back” means that the twist goes back, and usually, the amount of twist generated in the twisting machine main body 1 quantitatively is the introduction point of the twisting machine main body 1 (the position of the first turn roll 18). Is expressed as a percentage in 100%. By increasing the twist back, the amount of twist returning from c1 to c2 and c3 changes, and the kill in the product has a positive torque. Therefore, if the twistback is within 100%, the origin (the intersection of the horizontal axis and the vertical axis) → a → X. X is the intersection of the torque and the number of twists when the product is obtained.

It is said that the twist back is 100% or more.
It means that the product is untwisted in the stranded wire machine main body 1 and becomes a product.
% Is to be twisted in the twisting machine main body 1. That is, when the twist back is relatively high, the origin → b → c
The relation is 3 → X1, the middle is the origin → b → c2 → X, and without the twist back, the origin → b → c1 → X2. Therefore, according to the required torque of the cord to be manufactured, the number of twists at the point b is controlled by the high-speed rotation torque adjusting device 2 in consideration of the twistback in FIG. 7, so that the cord kill can be adjusted freely. According to the present invention, the precision transmission 4b adjusts the number of twists from the origin to the point b in consideration of the twistback.
Since the fine adjustment of the number of revolutions can be accurately performed even at the above-described high-speed rotation, a code having excellent quality can be obtained.

On the other hand, in the conventional apparatus, a twist of 2N is introduced by passing from the first turn roll 18 to the second turn roll 19, and an α twist is introduced by an over twister in the twisting machine main body. As shown in FIG. 8, the twisting mechanism is twisted up to the point A, that is, after the second turn roll, twisted to the point B by the over twister in the twisting machine main body, and returned to the point X as shown in FIG. Being a product.

In the present invention, since a bow extending between the disks 15, 15 is not used, energy loss can be reduced even if the diameter of the winding bobbin 10 is increased in order to increase productivity. However, if the bow is simply removed, the strand bundle greatly swells outward due to centrifugal force, and the strand break tends to occur frequently. However, in the present invention, a torque adjusting device indispensable for the adjustment of the code kill is not provided in the cradle 9, but is arranged as the high-speed rotation torque adjusting device 2 upstream of the twisting machine main body 1. For this reason, the cradle 9 can be made compact and small, whereby the disks 15, 1
Since the span L of No. 5 can be narrowed, it is possible to reliably prevent the wire bundle from greatly expanding outward due to centrifugal force.

Further, since the high-speed rotation torque adjusting device 2 for applying the maximum twist is provided outside the twisting machine main body 1, the state of the wire bundle passing through the device is detected by a sensor, so that the wire breakage. Can be easily and reliably detected, and a measure against disconnection can be taken promptly without causing a large number of defective products. In addition, as a driving system of the high-speed rotation torque adjusting device 2, the number of rotations of the main motor 3 for applying the rotation torque to the twisting machine main body 1 is once reduced by the reduction pulley 4a.
b, the rotation speed is finely adjusted, and the finely adjusted rotation speed is increased by the speed-increasing pulley 4c and given to the high-speed rotation torque adjusting device 2, so that the amount of twist suitable for the characteristics of the cord to be manufactured can be freely controlled. And a good quality cord can be manufactured.

In the present invention, since the body surfaces of the first turn roll 18 and the second turn roll 19 are conical,
At the portion of the first turn roll 18, the wire bundle advances while rolling to the small diameter side of the cone, and twisting enters at the entrance side of the first turn roll 18 and escapes at the exit side. Second
The same effect is obtained with the turn roll 19 as well, and the twist is continuously sent in the direction from the second turn roll 19 to the first turn roll 18, so that the pitch of each part of the strand is twisted at a predetermined pitch. Will be.

The results of the specific application of the present invention are as follows.
A steel cord having a 1 × 3 structure and a twist pitch of 12 mm was produced from a 0.22 mm diameter plated high carbon steel wire. A winding bobbin diameter of 500 mmφ, a disk span L of 1.08 in relation to a disk diameter D in terms of L / D, a length between turn rolls of 1550 mm, and a 7.5 kW capacity main motor are used. 3000 rpm
The high-speed rotation torque adjustment device 2 was finely adjusted to 8400 pm by a precision transmission including a continuously variable transmission.

For comparison, a winding bobbin diameter 500 mm
φ, has an overtwister inside, a span ratio L / D between the disks is 2.24, a guide pipe with a diameter of 6 mm is laid between the disks, and the length between turn rolls is 1700 mm. , Twisting machine main body rotation speed 3000rpm
m and an overtwister rotation speed of 2400 rpm to produce a cord having the above specifications. In this case, the main motor capacity is 1
1.0 KW and a shaft cooling fan 0.75 × 2 KW were required.
As a result, the code quality of the manufactured device was the same as that of the conventional device, but the power consumption of the conventional device was 7.5 KW.
Whereas, according to the present invention, 4.9 KW is sufficient,
I was able to save a lot of power.

For comparison, in the conventional apparatus, when the guide pipe was removed and the cord bundle was directly passed between the discs to manufacture a cord, the main motor was 7.5K.
Although the wire bundle could be manufactured even with the W capacity, the wire bundle swelled greatly, and when the wire tension was increased to suppress this, the wire breakage ratio was 5.8 times that of the device according to the present invention. From this result, it can be seen that a problem occurs simply by removing the guide pipe, and it is essential to make the span ratio L / D between the disks appropriate.

[0032]

According to the present invention described above, cup-shaped discs 15, 15 are provided on both sides of the cradle 9 on which the winding bobbin 10 is arranged in a short span so as to face each other, and the wires are directly passed between the discs. A twisting machine main body 1, a high-speed rotation torque adjusting device 2 disposed upstream of the twisting machine main body 1, and forcibly twisting a strand bundle guided from a supply bobbin before introducing the strand bundle into the twisting machine main body 1. And a speed change mechanism 4 that once reduces the rotational torque applied to the twisting machine main body 1, finely adjusts the rotational speed in this state, and then increases the speed. Even without this, it is possible to suppress the swelling of the wire bundle to the outside, and it is possible to easily and precisely control the code kill, so that cords of good quality can be manufactured, and Since there is a most twisted portion to the outside of the stranding machine body, performed easily break detection of the strand, this excellent effects such can improve the accuracy of can be obtained by. According to the second aspect, since the span L of the disks 15, 15 is 0.8 to 1.15 times the diameter D of the disk, it is possible to prevent the wire from bulging outside without using a bow. At the same time, an excellent effect that workability such as attachment and detachment of the winding bobbin can be improved can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing an outline of an embodiment of a double twisting wire machine according to the present invention.

FIG. 2 is an enlarged detailed view of the twisting machine main body of FIG. 1;

FIG. 3 is an enlarged plan view of the twisting machine main body of FIG. 1;

4A is a plan view of a high-speed rotation torque adjusting device according to the present invention, and FIG. 4B is a vertical sectional side view of the same.

FIG. 5A is a sectional view taken along line XX of FIG. 4A;
FIG. 5B is a cross-sectional view taken along line YY in FIG.

FIG. 6 is an explanatory view showing an outline of a transmission mechanism according to the present invention.

FIG. 7 is a torque / twist frequency diagram showing a twisting mechanism in the present invention.

FIG. 8 is a torque / twist frequency diagram showing a twisting mechanism in a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Twisting wire main body 2 High-speed rotation torque adjusting device 3 Main motor 4 Transmission mechanism 9 Cradle 15, 15 Disk

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Mamoru Suzuki 7-1 Kita Industrial Park, Kitakami City, Iwate Prefecture Tokyo Steel Cord Steel Cord Co., Ltd. F term (reference) 3B153 AA02 CC52 DD09 DD10 DD11 DD37 DD47 DD50 GG40

Claims (2)

[Claims] 1. A twisting machine main body 1 having cup-shaped discs 15 and 15 provided on opposite sides of a cradle 9 on which a winding bobbin 10 is arranged in a short span so that strands are passed directly between the discs. A high-speed rotation torque adjusting device 2 that is arranged upstream of the twisting machine main body 1 and that forcibly twists a strand bundle guided from a supply bobbin before introducing the strand bundle into the twisting machine main body 1; And a speed change mechanism 4 for temporarily reducing the rotating torque to be applied, finely adjusting the rotation speed in this state, and then increasing the speed. 2. The double twist twisting machine according to claim 1, wherein a span L between the disks 15, 15 is 0.8 to 1.15 in a ratio L / D to a diameter D of the disk 15.