JP7816764B2 - Wire twisting machine and method for manufacturing wire twisting machine - Google Patents

Description

This application relates to a wire twisting machine that twists multiple wires together to produce a stranded wire, and a method for manufacturing a stranded wire.

Traditionally, stranded wires are manufactured by twisting together multiple strands of wire, such as steel wire or copper wire (simply referred to as "strands" in this specification and claims). Stranded wires are used, for example, in steel cords used as tire reinforcement for automobiles and aircraft. Stranded wires include those made by twisting together multiple strands of wire, those made by twisting together strands of multiple strands, and those made by twisting strands of wire. The type of wire, number of wires, and number of twists of a stranded wire are determined depending on the conditions of use, etc.

Prior art of this type includes a wire twisting machine in which a pair of inner flyers are placed between a pair of outer flyers, and the rotational power of the outer flyers' rotational shafts rotates the inner flyers' rotational shafts (see, for example, Patent Document 1). In this wire twisting machine, a power transmission mechanism using planetary gears is placed between the outer flyer's rotational shaft and the inner flyer's rotational shaft, and this power transmission mechanism transmits the rotation of the outer flyers to the inner flyer, causing the inner flyer to rotate.

JP 2010-29904 A

However, in the case of the above-mentioned wire twisting machine, a planetary gear is used in the power transmission mechanism that transmits the rotation of the outer flyer to the inner flyer. This increases the number of parts in the power transmission mechanism, and each part requires precise machining, which requires a lot of labor and time. Furthermore, because the power transmission mechanism uses gears, it is noisy and creates a poor working environment. Furthermore, if you try to change the rotation speed ratio between the outer flyer and the inner flyer, a new gear must be manufactured, and depending on the rotation speed ratio, it may not be possible to manufacture a gear with the appropriate number of teeth.

The present application therefore aims to provide a wire twisting machine and a wire twisting method that can easily change the rotation speed ratio between the outer and inner flyers and reduce noise.

In order to achieve the above object, a wire twisting machine according to one aspect of the present application is a wire twisting machine for twisting a plurality of strands of wire together to produce a stranded wire, and includes a pair of first rotors having outer flyers and a first rotation shaft at the axis of the outer flyers, a second rotor supported by the pair of first rotors and having a pair of inner flyers between the outer flyers of the pair of first rotors and having a second rotation shaft arranged coaxially with the first rotation shaft, a passage for feeding the plurality of strands of wire between the outer flyers of the first rotors and the inner flyers of the second rotor, and a rotation of the first rotation shaft. and a rotational power transmission body that rotates the second rotation shaft with power, the rotational power transmission body having a power transmission mechanism that rotates the second rotation shaft in a direction opposite to the rotation direction of the first rotation shaft, the power transmission mechanism being a belt drive mechanism including a drive pulley provided on the first rotation shaft, a driven pulley provided on the second rotation shaft, a plurality of transmission pulleys provided between the drive pulley and the driven pulley, and belts that are respectively wound between the drive pulley and the transmission pulley and between the driven pulley and the transmission pulley, the transmission pulleys including at least two transmission pulleys that are aligned with the drive pulley and another transmission pulley that is aligned with the driven pulley, and the belts being a double-sided toothed belt that is wound around the drive pulley and the at least two transmission pulleys, and a toothed belt that is wound around the driven pulley and the transmission pulley.

This configuration provides a wire twisting machine including a pair of first rotors each having an outer flyer and a second rotor having a pair of inner flyers between the pair of first rotors. The power transmission mechanism of the belt drive mechanism allows the rotational power of the first rotor shaft to rotate the second rotor shaft in the opposite direction. The power transmission mechanism includes a drive pulley on the first rotor shaft, a driven pulley on the second rotor shaft, and multiple transmission pulleys between the drive and driven pulleys. The belt drive mechanism transmits power between the drive and transmission pulleys and between the driven and transmission pulleys via belts, reducing noise. Furthermore, the power transmission mechanism allows the rotation speed ratio between the outer and inner flyers to be easily changed by changing the diameter of each pulley. With the above configuration, power can be accurately transmitted between the drive pulley and the transmission pulley arranged in the same row as the drive pulley by the double-sided toothed belt, and the power transmitted from the transmission pulley driven by the drive pulley to the transmission pulley arranged in the same row as the driven pulley can be accurately transmitted by the toothed belt arranged between the transmission pulley and the driven pulley. Therefore, the driven pulley can be rotated accurately by the power of the drive pulley.

The rotary power transmission body may also include a positional relationship maintaining body that maintains the positional relationship between the first rotating shaft, the second rotating shaft, and the power transmission mechanism when the first rotating shaft and the second rotating shaft rotate.

With this configuration, when the rotational power of the first rotating shaft is transmitted to the second rotating shaft, the positional relationship with the power transmission mechanism is maintained by the positional relationship maintaining member, allowing the second rotating shaft to rotate stably.

Furthermore, the transmission pulley arranged in the same row as the drive pulley may be composed of three transmission pulleys.

With this configuration, by changing the diameter of at least two of the three transmission pulleys rotated by the drive pulley, it is possible to easily change the rotation speed ratio of the driven pulley, which is rotated by the power of the drive pulley. Furthermore, the portion of the drive pulley over which the belt is attached is longer, stabilizing rotation and improving power efficiency. Furthermore, the belt's lifespan is extended.

The second rotating body may also be configured in a bow shape, with a pair of inner flyers connected by a bow plate formed in an outward arc.

With this configuration, a pair of inner flyers connected by an outward-facing arc-shaped bow plate can reduce air resistance when the second rotating body rotates. This reduces the amount of power consumed to rotate the second rotating body, thereby saving energy.

A wire twisting machine according to another aspect of the present application is a wire twisting machine for twisting a plurality of strands of wire together to produce a stranded wire, and includes: a pair of first rotors having an outer flyer and a first rotation shaft at the axis of the outer flyer; a second rotor supported by the pair of first rotors, having a pair of inner flyers between the outer flyers of the pair of first rotors and having a second rotation shaft arranged coaxially with the first rotation shaft; a passage for feeding the plurality of strands of wire between the outer flyers of the first rotors and the inner flyers of the second rotor; and a rotational power transmission body that rotates the second rotating shaft, the rotational power transmission body having a power transmission mechanism that rotates the second rotating shaft in a direction opposite to the rotation direction of the first rotating shaft, the power transmission mechanism being a belt drive mechanism having a drive pulley provided on the first rotating shaft, a driven pulley provided on the second rotating shaft, a plurality of transmission pulleys provided between the drive pulley and the driven pulley, and belts that are respectively wound between the drive pulley and the transmission pulley and between the driven pulley and the transmission pulley. The power transmission mechanism is configured to rotate the second rotating shaft at a higher rotation speed than the first rotating shaft.

This configuration allows the rotation speed of the second rotating body, which has a smaller volume than the first rotating body, to be increased, reducing noise and power consumption.

Furthermore, the first rotating body may be configured to feed the multiple strands of wire from the axial position of one of the first rotating shafts to the outer peripheral portion of one of the outer flyers, and feed the multiple strands of wire fed to the outer peripheral portion of the other outer flyer to the axial position of the other first rotating shaft, and the second rotating body may be configured to feed the multiple strands of wire from the axial position of the other second rotating shaft to the outer peripheral portion of the other inner flyer, and feed the multiple strands of wire fed to the outer peripheral portion of one of the inner flyers to the axial position of one of the second rotating shafts.

With this configuration, the first rotating body can twist the multiple wires twice: once when they are fed from the axial position of the first rotating shaft to the outer periphery of the outer flyer, and once when they are fed from the outer periphery of the outer flyer to the axial position of the first rotating shaft. Furthermore, the second rotating body can twist the multiple wires twice: once when they are fed from the axial position of the second rotating shaft to the outer periphery of the inner flyer, and once when they are fed from the outer periphery of the inner flyer to the axial position of the second rotating shaft. Therefore, the multiple wires can be twisted four times by the first rotating body and the second rotating body rotating inside it.

On the other hand, the method for manufacturing a stranded wire according to the present application is a method for manufacturing a stranded wire by twisting a plurality of wires together, and is a stranding machine including: a pair of first rotors each having an outer flyer and a first rotation axis at the axis of the outer flyer; a second rotor supported by the pair of first rotors, having a pair of inner flyers between the outer flyers of the pair of first rotors, and having a second rotation axis arranged coaxially with the first rotation axis; and a rotational power transmission body that rotates the second rotor in a direction opposite to the rotation direction of the first rotors,
The first rotating body sends the plurality of wires from the axial position of one of the first rotating shafts to the outer peripheral portion of one of the outer flyers to twist them once, and sends the plurality of wires sent to the outer peripheral portion of the other outer flyer to the axial position of the other first rotating shaft to twist them once,
The second rotating body is rotated at a higher rotational speed than the first rotating body , and the multiple wires are sent from the axial position of the other second rotating shaft to the outer peripheral portion of the other inner flyer and twisted once, and the multiple wires sent to the outer peripheral portion of one of the inner flyers are sent to the axial position of one of the second rotating shafts and twisted once .

With this configuration, the twisting machine comprises a pair of first rotors with outer flyers, and a second rotor with a pair of inner flyers between the pair of first rotors. The rotary power transmission body rotates the second rotor in the opposite direction to the rotation direction of the first rotors. By rotating the second rotor at a higher rotation speed than the first rotor, the second rotor, which has a smaller volume and rotates between the pair of outer flyers of the first rotor, can twist more, thereby reducing power consumption. Furthermore, this twisting method can reduce noise by increasing the rotation speed of the second rotor, which has a smaller volume.

With this configuration, the first rotating body can twist the multiple wires twice: once when they are fed from the axial position of the first rotating shaft to the outer periphery of the outer flyer, and once when they are fed from the outer periphery of the outer flyer to the axial position of the first rotating shaft. Furthermore, the second rotating body can twist the multiple wires twice: once when they are fed from the axial position of the second rotating shaft to the outer periphery of the inner flyer, and once when they are fed from the outer periphery of the inner flyer to the axial position of the second rotating shaft. Therefore, the multiple wires can be twisted four times by the first rotating body and the second rotating body rotating inside it.

This application makes it possible to provide a wire twisting machine that allows for easy adjustment of the rotation speed ratio between the outer and inner flyers and reduces noise.

FIG. 1 is a cross-sectional view showing the configuration of a wire twisting machine according to an embodiment of the present application. FIG. 2 is a schematic diagram showing the feeding of a twisted wire in the twisting machine shown in FIG. FIG. 3 is a perspective view showing a rotary power transmission body of the wire twisting machine shown in FIG. FIG. 4 is a schematic view showing the arrangement of pulleys as viewed along the arrows IV-IV shown in FIG. FIG. 5 is a schematic view showing the arrangement of pulleys as viewed along arrows VV shown in FIG. 6A and 6B are schematic diagrams showing the relationship between the pulleys and the belt shown in FIG. 4, where (A) is a schematic diagram showing a first example, and (B) is a schematic diagram showing a second example. FIG. 7 is a graph showing the relationship between power consumption and the number of twists in the wire twisting machine shown in FIG.

Embodiments of the wire twisting machine 10 according to the present application will be described below with reference to the drawings. In the following embodiments of the wire twisting machine 10, an example of internal winding will be described in which multiple wires 1 are introduced from the outside and wound around the internal take-up reel 5 as a twisted wire 2. The concepts of up, down, left, and right in this specification and claims correspond to the concepts of up, down, left, and right as viewed from the perspective of the wire twisting machine 10 shown in Figure 1. In addition to the embodiments described below, the wire twisting machine 10 can also be configured for external winding, in which multiple wires 1 are introduced from the internal payout reel 3 and wound around the outside as a twisted wire 2.

<Configuration of wire twisting machine>
FIG. 1 is a cross-sectional view showing the configuration of a wire twisting machine 10 according to one embodiment. In this embodiment, the wire twisting machine 10 includes a pair of machine frames 11 spaced a predetermined distance apart, and first rotating shafts 21 of a pair of first rotors 20 are supported by the pair of machine frames 11. Each of the first rotating shafts 21 is rotatably supported by a bearing 11a provided on the machine frame 11. Each of the first rotating shafts 21 has an input pulley 14 on a portion that protrudes outward from the machine frame 11. Each of the input pulleys 14 is driven by a respective drive belt 15 wound between the input pulley 14 and an output pulley 13 of a drive motor 12. The output pulleys 13 are connected to each other by a shaft 13a and are synchronized. The drive belts 15 may be V-belts, toothed belts, or the like. For example, using a toothed belt as the drive belt 15 allows the rotation speeds of the input pulleys 14 to be the same.

The pair of first rotors 20 supported by the pair of machine frames 11 have identical configurations except for the configuration of the passages 21a and 21b through which the multiple strands 1 or twisted wires 2 pass. The same components are denoted by the same reference numerals. In the illustrated wire twisting machine 10, the right-hand component is referred to as "one side" and the left-hand component as "the other side." The first rotor shaft 21 of the first rotor 20 is provided with an outer flyer 22 a predetermined distance inward from the inner surface of the machine frame 11. A cylindrical bearing 23 is provided inside the outer flyer 22 between the pair of first rotors 20, supporting the second rotor 30. The second rotor 30 has a second rotor shaft 31 arranged coaxially with the first rotor shaft 21. The second rotor shaft 31 is rotatably supported by a bearing 23a provided on the inner periphery of the bearing 23 of the first rotor 20. The first rotor shaft 21 and the second rotor shaft 31 rotate about the same axis CL. The second rotating body 30 has a pair of inner flyers 32 that rotate between the outer flyers 22 of the pair of first rotating bodies 20.

A rotational power transmission body 50 is provided on the outer periphery of the bearing portion 23 of the first rotating body 20, and rotates the second rotating shaft 31 using the rotational power of the first rotating shaft 21. The rotational power transmission body 50 is rotatably supported by a bearing 23b provided on the outer periphery of the bearing portion 23. Details of the rotational power transmission body 50 will be described later.

In this embodiment, the twisting machine 10 receives multiple strands of wire 1 from the payout reel 3 located on the right side of Figure 1. Therefore, the first rotating shaft 21 of the right-side first rotating body 20 is provided with a passage 21a at its axial center through which the multiple strands of wire 1 pass. A first turn roller 24 is provided a predetermined distance inward from the machine casing 11 on the first rotating shaft 21, feeding the multiple strands of wire 1 toward a first guide roller 25 located on the outer periphery of the outer flyer 22. The first rotating shaft 21 of the left-side first rotating body 20 is provided with a second turn roller 27, which guides the stranded wire 2 from a second guide roller 26 located on the outer periphery of the outer flyer 22 to the axial center of the first rotating shaft 21. A passage 21b for the stranded wire 2 is provided from the position of the second turn roller 27 toward the axial center of the second rotating shaft 31.

The second rotating body 30 has second rotating shafts 31 at both left and right ends supported by the first rotating shaft 21. The second rotating shafts 31 are rotatably supported by bearings 23a provided in the bearing portions 23 of the first rotating shaft 21. The second rotating shafts 31 are supported on the same axis CL as the first rotating shaft 21. The left and right second rotating shafts 31 have inner flyers 32 provided on their insides, and the left and right inner flyers 32 are connected by a bow plate 33 formed in an outward arc. This gives the inner flyers 32 a bow shape.

The second rotating shaft 31 on the left side has a passage 31a at its axial center through which the twisted wire 2 passes. The twisted wire 2 fed from passage 21b of the first rotating shaft 21 to passage 31a of the second rotating shaft 31 is bent by a third turn roller 35 provided on the second rotating shaft 31 and fed to the outer periphery of the inner flyer 32. The second rotating shaft 31 on the right side has a fourth turn roller 36 that bends the twisted wire 2 fed from the outer periphery of the inner flyer 32 toward the center of the second rotating body 30. The second rotating shaft 31 has a passage 31b that feeds the twisted wire 2 from the position of the fourth turn roller 36 toward the take-up reel 5 provided in the center of the second rotating body 30.

A cradle 40 is supported between the inner flyers 32 of the second rotating body 30. The cradle 40 is supported and suspended by axles 34 that protrude inward from the left and right inner flyers 32. The cradle 40 is rotatably supported by bearings 34a provided on the axles 34, so it remains suspended from the axles 34 even when the inner flyers 32 rotate. A take-up reel 5 is provided on the cradle 40. The take-up reel 5 is rotatably supported on an axis perpendicular to the axis of the second rotating shaft 31. The take-up reel 5 is driven to rotate by the rotational force of the second rotating shaft 31 via a drive mechanism 41 provided between the take-up reel 5 and the second rotating shaft 31 on the right side shown in the figure. The drive mechanism 41 employs a gear mechanism that converts the rotation axis of the power by 90 degrees using a gear driven by a gear provided on the right axle 34, and a belt mechanism that uses this power to rotate the take-up reel 5. A known mechanism can be used for the drive mechanism 41, so a detailed description will be omitted.

With this type of wire twisting machine 10, driving the drive motor 12 rotates a pair of first rotating shafts 21, and the rotational power of these first rotating shafts 21 rotates the second rotating shaft 31 in the opposite direction via the rotational power transmission body 50. With this wire twisting machine 10, an inner flyer 32 is provided inside the outer flyer 22, so multiple strands of wire 1 can be twisted multiple times using this small wire twisting machine 10.

<Stranded wire flow>
FIG. 2 is a schematic diagram showing the feeding of the twisted wire 2 in the twisting machine 10 shown in FIG. The feeding of the twisted wire 2 will be described with reference to FIG. 1 as well. In this embodiment, wires 1 are respectively fed from a plurality of externally provided payout reels 3, and the plurality of wires 1 bundled by a collective voice 4 are introduced from the axial position of the first rotating shaft 21 of one of the first rotors 20. The plurality of wires 1 are fed from the axial position of the first rotating shaft 21 by a first turn roller 24 to a first guide roller 25 provided on the outer periphery of one of the outer flyers 22. The plurality of wires 1 are twisted a first time when bent toward the first guide roller 25 by the first turn roller 24. As a result, the plurality of wires 1 become a twisted wire 2.

The stranded wire 2 fed to the first guide roller 25 of the outer flyer 22 is then fed to the second guide roller 26 provided on the outer periphery of the other outer flyer 22, and from the second guide roller 26 to the second turn roller 27 provided on the other first rotating shaft 21. The stranded wire 2 is bent toward the axial center of the first rotating shaft 21 by the second turn roller 27 and fed to the second rotating shaft 31. The stranded wire 2 is twisted a second time when bent by the second turn roller 27.

The twisted wire 2 fed to the second rotating shaft 31 passes through a passage 31a provided on the second rotating shaft 31 and is fed to the outer periphery of the inner flyer 32 by a third turn roller 35 provided on the other side of the second rotating shaft 31. The twisted wire 2 is twisted a third time when the feed direction is bent by the third turn roller 35. The twisted wire 2 fed to the outer periphery of the inner flyer 32 is fed along a bow plate 33 formed in an outward arc to the outer periphery of one of the inner flyers 32. The twisted wire 2 fed to the outer periphery of one of the inner flyers 32 is bent toward the axial center of the second rotating shaft 31 by a fourth turn roller 36 provided on one of the second rotating shafts 31. The twisted wire 2 is twisted a fourth time when the feed direction is bent by the fourth turn roller 36. The stranded wire 2 fed in the axial direction of the second rotating shaft 31 passes through a passage 31b provided in the second rotating shaft 31 and is wound onto a take-up reel 5 provided in the center.

In this way, the above-mentioned twisting machine 10 can produce a four-degree twisted twisted wire 2 in a space-saving manner by equipping a single device with an outer flyer 22 and an inner flyer 32.

As mentioned above, the twisting machine 10 can also be configured as an external winding machine, in which multiple strands 1 are unwound from the reel 5 of the cradle 40 supported by the second rotor 30, and the twisted wire 2, which has been twisted multiple times between the inner flyer 32 and the outer flyer 22, is then wound onto an external reel. In the case of external winding, the twisted wire 2 flows in the opposite direction to that shown in the figure.

<Configuration of Rotational Power Transmission Body>
Fig. 3 is a perspective view showing the rotary power transmission body 50 of the wire twisting machine 10 shown in Fig. 1. Fig. 4 is a schematic diagram showing the positional relationship of pulleys 53 to 56 as viewed from the arrows IV-IV shown in Fig. 1. Fig. 5 is a schematic diagram showing the positional relationship of pulleys 58 and 59 as viewed from the arrows V-V shown in Fig. 1. The rotary power transmission body 50 shown in Fig. 3 shows an outline of each component.

As shown in FIG. 3 , the rotational power transmission body 50 has a power transmission mechanism 52 that rotates the second rotating shaft 31 in the opposite direction to the rotational direction of the first rotating shaft 21. The rotational power transmission body 50 has a positional relationship maintaining body 51 that maintains the positional relationship between the first rotating shaft 21 and the second rotating shaft 31 and the configuration of the power transmission mechanism 52 when the first rotating shaft 21 and the second rotating shaft 31 rotate. The positional relationship maintaining body 51 is supported by a bearing 23a on the bearing portion 23 of the first rotating shaft 21 and is configured to remain suspended from the bearing portion 23 due to its own weight. Therefore, the rotational power transmission body 50 remains suspended from the first rotating shaft 21 due to the weight of the positional relationship maintaining body 51, even when the first rotating shaft 21 and the second rotating shaft 31 rotate.

The power transmission mechanism 52 includes a drive pulley 53 mounted on the first rotating shaft 21 and multiple transmission pulleys 54-56 arranged in the same row as the drive pulley 53. In this embodiment, three pulleys, a first transmission pulley 54, a second transmission pulley 55, and a third transmission pulley 56, are provided in the same row as the drive pulley 53. The drive pulley 53, first transmission pulley 54, second transmission pulley 55, and third transmission pulley 56 are all toothed pulleys. A single double-sided toothed belt 57 is looped around the drive pulley 53, first transmission pulley 54, second transmission pulley 55, and third transmission pulley 56. The length of the drive pulley 53 over which the double-sided toothed belt 57 loops is longer, stabilizing rotation and improving power efficiency. Furthermore, the life of the double-sided toothed belt 57 is extended.

The first transmission pulley 54 is connected by a shaft 60 to a fourth transmission pulley 59, which is arranged in the same row as the driven pulley 58 on the second rotating shaft 31. Both the driven pulley 58 and the fourth transmission pulley 59 are toothed pulleys. A toothed belt 61 is looped between the driven pulley 58 and the fourth transmission pulley 59. In this way, the power transmission mechanism 52 is a belt-driven mechanism using a double-sided toothed belt 57 and a toothed belt 61. By using a belt-driven mechanism for the power transmission mechanism 52, power can be transmitted without the need for complex, high-precision parts, resulting in a wire twisting machine 10 that is low in cost and easy to maintain. Furthermore, belt drive also reduces noise.

As shown in Figure 4, when the drive pulley 53, on which the outer teeth of the double-sided toothed belt 57 are looped, rotates, the inner teeth of the double-sided toothed belt 57 rotate the first transmission pulley 54, second transmission pulley 55, and third transmission pulley 56. The first transmission pulley 54 is rotated at a precise rotation speed by the double-sided toothed belt 57 looped between the drive pulley 53 and the second transmission pulley 55 and third transmission pulley 56.

As shown in Figure 5, on the driven pulley 58 side, the fourth transmission pulley 59, which is connected to the first transmission pulley 54 by a shaft 60, is rotated in the same direction and at the same rotational speed as the first transmission pulley 54, and the driven pulley 58 is rotated by a toothed belt 61. The toothed belt 61, which is looped between the driven pulley 58 and the fourth transmission pulley 59, causes the driven pulley 58 to rotate at a precise rotational speed.

<Changing the rotation speed ratio in the power transmission mechanism>
6A and 6B are schematic diagrams showing the relationship between the pulleys 53 to 56 and the belt 57 shown in Fig. 4, with (A) being a schematic diagram showing a first example and (B) being a schematic diagram showing a second example. These examples are examples in which the diameters of the first transmission pulley 54 and the second transmission pulley 55 shown in Fig. 4 are changed.

The first example shown in Figure 6 (A) is an example in which the diameter of the first transmission pulley 54 shown in Figure 4 above is increased and the diameter of the second transmission pulley 55 is decreased. In this way, by increasing the diameter of the first transmission pulley 54, the power transmission mechanism 52 can reduce the rotation speed of the first transmission pulley 54 relative to the rotation speed of the drive pulley 53. Therefore, the power transmission mechanism 52 of this example can reduce the rotation speed of the second rotating shaft 31 relative to the rotation speed of the first rotating shaft 21 compared to the power transmission mechanism 52 of Figure 4.

The second example shown in Figure 6 (B) is an example in which the diameter of the first transmission pulley 54 shown in Figure 4 above is reduced and the diameter of the second transmission pulley 55 is increased. In this way, by reducing the diameter of the first transmission pulley 54, the power transmission mechanism 52 can increase the rotation speed of the first transmission pulley 54 relative to the rotation speed of the drive pulley 53. Therefore, the power transmission mechanism 52 of this example can increase the rotation speed of the second rotating shaft 31 relative to the rotation speed of the first rotating shaft 21 compared to the power transmission mechanism 52 of Figure 4.

As such, with the above-mentioned wire twisting machine 10, by using a belt-driven mechanism for the power transmission mechanism 52, the rotation speed ratio between the outer flyer 22 and the inner flyer 32 can be easily changed by changing the diameter of each transmission pulley 54-56. Furthermore, it is easy to accommodate any rotation speed ratio, and it can also be configured compactly. Moreover, because the power transmission mechanism 52 transmits power via a belt-driven mechanism, it reduces noise and is quieter.

<Relationship between number of twists and power consumption>
Figure 7 is a graph showing the relationship between power consumption and the number of twists in the wire twisting machine 10 shown in Figure 1. In the graph of Figure 7, the horizontal axis shows the number of twists (number of twists per minute) and the vertical axis shows the increase in power consumption. The power consumption of the wire twisting machine 10 is proportional to the volume inside the rotor (proportional to the square of the rotation diameter and the distance between the flyers). The wire twisting machine 10 shown in Figure 7 is an example in which power saving is considered by increasing the rotation speed of the small second rotor 30 equipped with an inner flyer 32 relative to the rotation speed of the large first rotor 20 equipped with an outer flyer 22.

The graph in Figure 7 shows, with a solid line, the case where the ratio of the rotation speed of the outer flyer 22 to the rotation speed of the inner flyer 32 is set to a rotation ratio of 2:1 when producing a four-twist stranded wire 2 using the twisting machine 10. The graph also shows, with a dashed dotted line, the case where the ratio of the rotation speed of the outer flyer 22 to the rotation speed of the inner flyer 32 is set to a rotation ratio of 3:1. This graph shows that a reversal in power consumption occurs at around 7,000 twists.

Therefore, with the above-mentioned wire twisting machine 10, when the number of twists is less than 7000, it is preferable to set the ratio of the rotation speed of the inner flyer 32 to the rotation speed of the outer flyer 22 to a rotation speed ratio of 3:1. For example, when using the above-mentioned wire twisting machine 10 to produce a 4000-twist stranded wire 2 with a 4-degree twist, the rotation speed of the inner flyer 32 can be set to 1500 rpm and the rotation speed of the outer flyer 22 to 500 rpm. This reduces power consumption.

On the other hand, when the twist number is 7,000 or more, it is preferable to set the ratio of the rotation speed of the inner flyer 32 to the rotation speed of the outer flyer 22 to a rotation speed ratio of 2:1. For example, when using the above-mentioned wire twisting machine 10 to produce a stranded wire 2 with an 8,400 twist and a 4-degree twist, the rotation speed of the inner flyer 32 can be set to 2,800 rpm and the rotation speed of the outer flyer 22 to 1,400 rpm. This reduces power consumption.

The twisting machine 10 can easily accommodate such changes in the ratio of the rotation speed of the inner flyer 32 to the rotation speed of the outer flyer 22 by changing the diameter of the transmission pulleys 54, 55, as shown in Figures 6(A) and 6(B). Therefore, the twisting machine 10 can easily reduce power consumption depending on conditions such as the number of twists.

<Other Modifications>
The above-described embodiment of the wire twisting machine 10 has been described as an example of an internal winding type in which a plurality of wires 1 are introduced from the outside and wound around the internal winding reel 5 as a twisted wire 2. The wire twisting machine 10 may also be configured as an external winding type in which a plurality of wires 1 are led out from the internal reel and wound around the outside as a twisted wire.

Furthermore, the above-described embodiment is merely an example, and various modifications are possible within the scope of the gist of this application, and this application is not limited to the above-described embodiment.

<Summary>
As described above, according to the wire twisting machine 10, by using a belt drive mechanism as the power transmission mechanism 52 that rotates the second rotor 30 having the inner flyer 32 with the first rotor 20 having the outer flyer 22, it is possible to easily change the rotation speed ratio between the first rotor 20 and the second rotor 30. Moreover, because power is transmitted by a belt drive mechanism, noise can be reduced.

Furthermore, by using a belt drive mechanism for the power transmission mechanism 52, the wire twisting machine 10 can transmit power without requiring complex, high-precision parts, making it possible to provide a wire twisting machine 10 that is cost-effective and easy to maintain.

Furthermore, the twisting machine 10 is configured so that the inner flyer 32 of the second rotor 30 is connected by a bow plate 33, thereby reducing air resistance when the second rotor 30 rotates. Furthermore, by setting the rotation speed of the second rotor 30 higher than that of the first rotor 20, power consumption can be reduced. For example, the twisting machine 10 can reduce power consumption by approximately 30% compared to a configuration in which the inner flyer 32 is connected by a bow plate rather than by a bow plate and the second rotor 30 and first rotor 20 rotate at the same speed.

1 wire
2 stranded wire
5 Winding reel 10 Wire twisting machine 20 First rotating body 21 First rotating shaft 22 Outer flyer 23 Bearing portion 23a Bearing 23b Bearing 24 First turn roller 25 First guide roller 26 Second guide roller 27 Second turn roller 30 Second rotating body 31 Second rotating shaft 32 Inner flyer 33 Bow plate 34 Shaft portion 34a Bearing 35 Third turn roller 36 Fourth turn roller 40 Cradle 50 Rotational power transmission body 51 Positional relationship maintaining body 52 Power transmission mechanism 53 Driving pulley 54 First transmission pulley 55 Second transmission pulley 56 Third transmission pulley 57 Double-sided toothed belt 58 Driven pulley 59 Fourth transmission pulley 61 Toothed belt

Claims (7)

A wire twisting machine that twists a plurality of wires together to produce a twisted wire,
A pair of first rotating bodies having an outer flyer and a first rotation axis at the axis center of the outer flyer;
A second rotating body supported by the pair of first rotating bodies, having a pair of inner flyers between the outer flyers of the pair of first rotating bodies, and having a second rotating shaft arranged coaxially with the first rotating shaft;
a passage for feeding the plurality of wires between the outer flyer of the first rotating body and the inner flyer of the second rotating body;
a rotational power transmission body that rotates the second rotation shaft using rotational power of the first rotation shaft;
Equipped with
the rotational power transmission body has a power transmission mechanism that rotates the second rotation shaft in a direction opposite to a rotation direction of the first rotation shaft,
the power transmission mechanism is a belt drive mechanism including a drive pulley provided on the first rotating shaft, a driven pulley provided on the second rotating shaft, a plurality of transmission pulleys that transmit power from the drive pulley to the driven pulley, and belts that are wound between the drive pulley and the transmission pulley and between the driven pulley and the transmission pulley , respectively;
The transmission pulley includes at least two transmission pulleys arranged in the same row as the drive pulley, and one transmission pulley arranged in the same row as the driven pulley,
The belts are a double-sided toothed belt wound around the drive pulley and at least two of the transmission pulleys, and a toothed belt wound around the driven pulley and the transmission pulleys .
Stranding machine. the rotational power transmission body has a positional relationship maintaining body that maintains a positional relationship between the first rotation shaft, the second rotation shaft, and the power transmission mechanism when the first rotation shaft and the second rotation shaft rotate.
The wire twisting machine according to claim 1. The transmission pulley provided in the same row as the drive pulley is composed of three transmission pulleys.
The wire twisting machine according to claim 1 . The second rotating body is configured in a bow shape by connecting the pair of inner flyers with a bow plate formed in an outward arc shape.
The wire twisting machine according to claim 1 or 2. A wire twisting machine that twists a plurality of wires together to produce a twisted wire,
A pair of first rotating bodies having an outer flyer and a first rotation axis at the axis center of the outer flyer;
A second rotating body supported by the pair of first rotating bodies, having a pair of inner flyers between the outer flyers of the pair of first rotating bodies, and having a second rotating shaft arranged coaxially with the first rotating shaft;
a passage for feeding the plurality of wires between the outer flyer of the first rotating body and the inner flyer of the second rotating body;
a rotational power transmission body that rotates the second rotation shaft using rotational power of the first rotation shaft;
Equipped with
the rotational power transmission body has a power transmission mechanism that rotates the second rotation shaft in a direction opposite to a rotation direction of the first rotation shaft,
the power transmission mechanism is a belt drive mechanism including a drive pulley provided on the first rotating shaft, a driven pulley provided on the second rotating shaft, a plurality of transmission pulleys that transmit power from the drive pulley to the driven pulley, and belts that are wound between the drive pulley and the transmission pulley and between the driven pulley and the transmission pulley, respectively;
The power transmission mechanism is configured to rotate the second rotating shaft at a rotation speed greater than that of the first rotating shaft.
Stranding machine. The first rotating body is configured to feed the plurality of wires from the axial position of one of the first rotating shafts to the outer peripheral portion of one of the outer flyers, and to feed the plurality of wires fed to the outer peripheral portion of the other outer flyer to the axial position of the other first rotating shaft,
The second rotating body is configured to feed the plurality of wires from the axial center position of the other second rotating shaft to the outer peripheral portion of the other inner flyer, and to feed the plurality of wires fed to the outer peripheral portion of one of the inner flyers to the axial center position of one of the second rotating shafts.
The wire twisting machine according to claim 1 or 2. A method for manufacturing a stranded wire by twisting together a plurality of wires,
A pair of first rotating bodies having an outer flyer and a first rotation axis at the axis center of the outer flyer;
A second rotating body supported by the pair of first rotating bodies, having a pair of inner flyers between the outer flyers of the pair of first rotating bodies, and having a second rotating shaft arranged coaxially with the first rotating shaft;
a rotational power transmission body that rotates the second rotor in a direction opposite to the rotational direction of the first rotor,
The first rotating body sends the plurality of wires from the axial position of one of the first rotating shafts to the outer peripheral portion of one of the outer flyers to twist them once, and sends the plurality of wires sent to the outer peripheral portion of the other outer flyer to the axial position of the other first rotating shaft to twist them once,
The second rotating body is rotated at a rotation speed greater than that of the first rotating body , and the plurality of wires are fed from the axial center position of the other second rotating shaft to the outer circumferential portion of the other inner flyer to be twisted once, and the plurality of wires fed to the outer circumferential portion of one of the inner flyers are fed to the axial center position of one of the second rotating shafts to be twisted once .
Method for manufacturing stranded wire.