JP5004287B2 - Twisted wire machine and method for producing stranded wire using the same - Google Patents

Description

  The present invention relates to a stranded wire machine and a stranded wire manufacturing method using the stranded wire machine (hereinafter also simply referred to as “manufacturing method”), and more particularly, to an improved single twist buncher type stranded wire machine and a stranded wire machine using the same. The present invention relates to a method for manufacturing a wire.

  Tubular, single twist buncher, and double twist buncher types are known as twisting machines for twisting strands of a plurality of strands. Among them, a tubular type or double twist buncher type twisting machine is generally used for the twisted wire of the steel cord. However, such tubular type and double twist buncher type stranding machines have the drawback that it is difficult to improve workability and to develop automation because either the material side or the product side is inside the high-speed rotating body. It was.

  In contrast, a single twist buncher type stranding machine is rotated by mounting either the material side or the product side on a rotating body, so the drive mechanism is complex and the high-speed rotating body is large, resulting in high speed. In the past, large and low-speed devices have been used only for manufacturing electric cables and the like. In this case, if the material side rotates, the larger the number of strands, the larger the device, which is not economical. Therefore, the type with the winding side rotating without restrictions on the number of strands and the amount of winding is more efficient. It is considered suitable.

For example, Patent Document 1 discloses that a single take-up drum (capstan) that determines the moving speed of a stranded wire is installed on the same axis as the rotation center and driven to reduce the size of the apparatus and realize high-speed rotation. A twist buncher type stranding machine is disclosed. In addition, as a single twist buncher, a type in which the material side rotates and a type in which the take-up side rotate are arranged in series and are rotated relative to each other to be referred to as a double twist, but there are not practical advantages. .
Japanese Patent Laid-Open No. 7-3676 (claims, etc.)

  By the way, when twisting a bundle of highly elastic strands such as steel cords with a single twist or double twist buncher twisting machine, there is a force to return to the original state (spring back) after twisting. A mechanism that eliminates twisting back of the stranded wire due to the back is required. As a method of eliminating the twist back of the twisted wire, conventionally, (1) a method of releasing the rotational return by the spring back before winding, or (2) further adding twist (over twist) of the rotational return. There is a known method of returning from the beginning.

  In this regard, although the twisting machine according to Patent Document 1 satisfies the request for downsizing and the like, it is difficult to incorporate any of these methods (1) and (2). First, in the stranded wire machine according to Patent Document 1, since the main flyer and the winding flyer are synchronized, it is not possible to provide a rotational speed difference before and after the take-up drum, and adjustment by the method of (1) I can't. That is, in such a twisting machine, if the main flyer and the winding flyer are not at the same rotational speed on average, the wire on the take-up drum is excessive and insufficient, so it is necessary to have the same rotational speed. If the rotational speed is the same, it is not possible to form a twist-back rotation equivalent to the springback due to the difference between the main flyer and the take-up flyer. In addition, with respect to the method (2), in order to add an over twist turbine device to the twisted wire machine according to Patent Document 1, it is revolved together with a rotating part (that is, a strong centrifugal force and air resistance). Further, it is not realistic because a part that rotates and rotates is required. If the untwisting cannot be eliminated, the steel cord manufacturing application lacks practicality. Therefore, it has been desired to realize a twisting machine having a untwisting canceling mechanism.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, and is particularly suitable for steel cord manufacturing applications, and a twisted wire machine capable of obtaining a twisted wire in which a twist back is eliminated with a compact device configuration, and An object of the present invention is to provide a method for producing a stranded wire using the wire.

  As a result of diligent study, the present inventor has improved a single twist buncher type twisted wire machine that has not been used in the production of steel cords in the past, and separated its constituent functions as small rotating devices for each function. The present invention is completed by finding that a small stranded wire machine capable of obtaining a desired stranded wire and a method for producing the stranded wire can be obtained by arranging the components in series, and making each part rotationally interlockable. It came to.

That is, the stranding machine of the present invention is a capstan that winds and feeds a bundle of wires that enters along a rotating shaft by rotation, and a wire guide that guides the strand from the feeding portion of the capstan to the rotating shaft. A rotary feed device comprising a wire guide and revolving around the rotary shaft;
A winding spool shaft that is coaxially and rotatably disposed with the rotary feeding device;
A spool shaft rotating device for rotating the winding spool shaft;
A flyer-type winding device that rotates coaxially with the rotary feed device and winds the wire bundle guided to the rotary shaft by the outgoing guide around the winding spool shaft;
The rotary feeding device, the flyer type winding device and the spool shaft rotating device are formed so as to be independently drivable.

  In the strand wire machine of this invention, it is preferable to install the over twist turbine apparatus which can be driven independently between the said rotary feeder and a fryer type winding apparatus. In addition, it is also preferable to install a bare wire-molding portion in front of the rotary feeder.

  Moreover, the method for producing a stranded wire of the present invention is a method for producing a stranded wire by twisting a strand of wire using the above-described twisted wire machine of the present invention. After twisting with the excess twist number which added the twist return number to the target twist number, it is twisted back by this twist return number with the said flyer type winding apparatus.

  Furthermore, another method for producing a stranded wire of the present invention is a method for producing a stranded wire by twisting a strand of wire using the above-described twisted wire machine of the present invention, wherein the strand bundle is applied to the rotary feeder. Then, after twisting with the target number of twists, the overtwist turbine device is twisted with the number of untwisting and twisted back.

  The stranded wire machine and the stranded wire manufacturing method of the present invention can be suitably used for manufacturing a steel cord.

  According to the present invention, the above-described configuration makes it possible to obtain a twisted wire that is particularly suitable for steel cord manufacturing applications and eliminates twisting back in a compact device configuration, and It became possible to realize the method of manufacturing the stranded wire used.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, the schematic of the strand wire machine which concerns on 1st embodiment of this invention is shown. As shown in the figure, the twisting machine of the present invention is a single twist buncher type twisting machine, and includes a rotary feeding device 10, a flyer type winding device 20, and a spool shaft rotating device 30. Each device is formed so that it can be driven independently.

  As described above, in the conventional twisting machine, rotation for twisting back could not be imparted to the strand of wire, but in the twisting machine of the present invention, the functions constituting the twisting machine are different from each other. It was possible to eliminate the twisting back of the obtained stranded wire by separating the devices and arranging them in series on the same axis as shown in the figure and enabling them to be driven separately. Further, in the twisting machine of the present invention, compactness is realized by gathering large and complicated parts near the center of the rotating shaft in the twisting machine that rotates at high speed.

  In addition, in the stranding machine of the present invention, since the separated devices are arranged in series on the same axis, it is possible to expose the wire bundle that passes while rotating between each device and the adjacent device. , Additional functions as a twisting machine, for example, a function of applying a lubricant to reduce the sliding resistance of the strands, a function of detecting disconnection, and a function of detecting tension are appropriately added to this cord. Is possible.

  In FIG. 2, the enlarged view of the rotary feeder 10 in the strand wire machine of this invention is shown. As shown in the figure, this rotary feeding device 10 guides the strand 1 from the feeding portion 11A to the rotation axis, and a capstan 11 that winds and feeds the strand 1 that enters along the rotation axis. An outgoing line guide 12 is provided and revolves around the rotation axis. The capstan 11 is composed of a multi-striped pulley as shown in the figure, and has a function of feeding the wire bundle 1 in the axial direction while rotating it. The outgoing wire guide 12 is made of a resin or metal tube or the like, and guides the twisted wire bundle 1 to the rotating shaft without restraining the twist of the twisted wire bundle 1, that is, while the strand wire bundle 1 is rotated. It has a function.

  In the illustrated example, the apparatus main body 13 and the capstan 11 of the rotary feeding apparatus 10 are rotationally driven through the drive shaft 15 of the apparatus main body and the drive shaft (differential) 16 of the capstan in the illustrated example. Has been. The example shown is a case where the twist pitch is fixed, but if the device body 13 and the capstan 11 are driven by separate motors, or if one of them is driven via a continuously variable transmission, the twist pitch during operation is It is also possible to change. In the figure, reference numeral 17 indicates a bevel gear, and reference numeral 18 indicates a gear.

  Further, as shown in FIG. 1, the flyer type winding device 20 rotates coaxially with the rotary feeding device 10, and the wire bundle 1 guided to the rotating shaft by the outgoing guide 12 is used for winding the spool shaft 40. It has a function to wind around. The fryer type winding device 20 includes a plurality of pulleys 21 a to 21 c and is driven independently by a motor 22 that is separate from the rotary feeding device 10. Thereby, it becomes possible to provide a rotational speed difference between the flyer type winding device 20 and the rotary feeding device 10.

  Further, the spool shaft rotating device 30 has a function of rotationally driving a winding spool shaft 40 that is arranged coaxially with the rotary feeding device 10 so as to rotate. The rotary feeding device 10 and the flyer type winding device 20 It is driven independently by a separate motor 31. Usually, it may be driven by torque setting.

  In the example shown in the figure, a spiking unit 50 is provided in front of the rotary feeding device 10 for applying a desired scoring to each of the strands 1a to 1e fed from the plurality of bobbins 100a to 100e. The strands 1a to 1e that have been subjected to the comb molding unit 50 are twisted to a predetermined number of twists at the twist point P by the revolution of the device body 13 of the rotary feeding device 10.

  Further, as shown in the figure, the spool shaft rotating device 30 is formed so as to be movable in the direction of the rotating shaft by a traverse device 60. The traverse device 60 is also driven by a traverse motor 61 separate from other devices. Yes.

  When manufacturing a stranded wire using the stranded wire machine shown in FIG. 1, the method of releasing the rotation return by the spring back of the above-mentioned (1) before winding is used. That is, first, the strand bundle 1 is twisted with an excess twist number obtained by adding the twist return number to the target twist number with the rotary feeder 10 and then twisted back with the twist return number with the flyer type winding device 20. is there.

  Specifically, for example, when a strand of high-carbon steel material is fed into a stranded wire while being fed at a constant distance (for example, 1 m) and twisted at a constant rotational speed (for example, 100 times), the end of the stranded wire When the is released, the torsion returns by springback due to elastic strain (about 35 times), and the remainder becomes a portion that retains the twisted shape as plastic strain. Therefore, in this case, when the strand bundle twisted at the twisting point is sent by the rotary feeding device 10, in the flyer type winding device 20, the rotation (for example, 60 to 75%) obtained by subtracting the amount of the springback of the rotational speed. (Approx. 65%)) If the wire bundle is sent while being loosened, about 35% of the remaining torsional rotation can be released before winding, and the spring back has no internal force, and the end When the wire is opened, the wire bundle will not rotate by itself. In this case, the target number of twists is 65 times, the number of untwisting is 35 times, and the number of excess twists including these is 100 times.

  In the twisting machine of the present invention, a capstan 11 (rotary drum) for feeding the wire bundle 1 is revolved together with a part to be twisted and rotated on the rotary feeder 10 and is rotated and rotated. It is mounted as a part. That is, since the capstan 11 is mounted in the vicinity of the center of the rotating shaft and the driving force is obtained by the double shafts 15 and 16 that relatively rotate at the center of the rotating shaft, the centrifugal force and the air resistance are small. Can be the same as or lower than that of a conventional twisting machine (twisting machine according to Patent Document 1).

  Further, in the present invention, even if there is a rotational speed difference between the rotary feeding device 10 on which the capstan 11 for feeding the wire bundle is mounted and applying twist rotation, and the flyer type winding device 20, Since there is no influence on the feed amount, it is possible to set the rotational speed difference necessary for releasing the distortion by the method (1).

  In FIG. 3, the schematic of the strand wire machine which concerns on 2nd embodiment of this invention is shown. In the twisted wire machine of the present invention shown in the figure, an overtwist turbine device 70 that can be driven independently is installed between the rotary feed device 10 and the flyer type winding device 20 in addition to the configuration of FIG. Has been. An enlarged view of the over twist turbine apparatus 70 is shown in FIG. The over twist turbine device 70 is a device having a function of adding a predetermined number of twists to the wire bundle 1 on the incoming line side and then twisting back the same number on the outgoing line side. Reference numeral 71 in the figure denotes an overtwist turbine driving motor.

  When a stranded wire is manufactured using the stranded wire machine shown in FIG. 2, the above-described method (2) is used in which a twist corresponding to the rotational return (2) is further added (over twist) and then returned. That is, in this case, first, the wire bundle 1 is twisted with the target twist number by the rotary feeding device 10, then twisted by the over twist turbine device 70 with the number of untwisting, and then twisted back.

  Specifically, when compared at the same rotational speed as in the above (1), first, the rotary feed device 10 is twisted 65 times during a certain distance to be processed into a stranded wire, and then the over twist turbine device 70 further Then, 35 twists corresponding to the remaining torsion are added and then returned 35 times. In this case, the wire twisted by the rotary feed device 10 is subjected to a strain equivalent to a spring back by the over twist turbine device 70 (for example, 125 to 160%) and returned (100%). When the end is opened, the wire bundle does not rotate by itself. In the present invention, the over-twist turbine device 70 is also provided independently of the other rotating bodies, so that the mechanism can be collected at the center of the rotating shaft, and the influence of centrifugal force and air resistance accompanying high-speed rotation is reduced. be able to.

  Here, if the over twist turbine device is rotating on a rotating body that rotates at 65 times in the above rotation speed comparison, it may be twisted 35 times and returned 35 times, but in the present invention, Because it is provided independently from other rotating bodies, the over twist turbine device is rotated 100 times, and the incoming wire bundle is rotated up to +35 times (this makes the number of twists 100 times). Twist and return to -35 times (this will give 65 twists). That is, the over-twist turbine device is rotated extra by the number of rotations applied to the wire bundle 1 by the rotary feeding device. In this case, although the rotation speed is increased, it is more advantageous to collect the mechanisms around the rotation axis without revolving at a high speed because there is less influence of centrifugal force and air resistance due to the high speed rotation.

  In the present invention, the equipment size of the rotary feed device 10 or the over twist turbine device 70 that is the fastest in the rotational speed ratio can be reduced, which is advantageous in increasing the overall speed of the twisting machine. In addition, since each of the above devices is rotationally linked by servo synchronization or transmission connection, quality adjustment necessary for cord manufacture can be easily performed by adjusting the rotational speed ratio and driving torque. .

Further, the straightness of the steel cord produced by the twisting machine of the present invention is very good, and it is not necessary to correct the straightness with a bending jig using a small diameter roll. However, if it is necessary to crush the cross-section of the cord flatly or bend with a small-diameter roll for the purpose of securing compressive residual stress on the cord surface, a small-diameter roll processing jig is placed on the shaft part of the flyer-type winding device. It can be easily installed.

  In the present invention, only the point that the twisting machine is configured as described above is important. The specific structure of each device constituting the twisting machine, the manufacturing conditions of the twisted wire, the conditions of the strands to be applied, etc. According to the law, it can be appropriately determined as desired, and is not particularly limited. The present invention is particularly useful when manufacturing steel cords that are highly elastic and have springback problems.

It is the schematic which shows the strand wire machine which concerns on 1st embodiment of this invention. It is an enlarged view which shows the rotary feeder in the stranding machine of this invention. It is the schematic which shows the strand wire machine which concerns on 2nd embodiment of this invention. It is an enlarged view which shows an over twist turbine apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire bundle 1a-1e Wire 10 Rotation feeder 11 Capstan 11A Feeding part 12 Outlet guide 13 Apparatus main body 14,22,31,61,71 Motor 15 Drive shaft 16 of main apparatus body Drive shaft 17 of capstan 17 Bevel gear 18 Gear 20 Flyer type winding device 21a to 21c Pulley 30 Spool shaft rotating device 40 Take-up spool shaft 50 Inverted portion 60 Traverse device 70 Over twist turbine device 100a to 100e Bobbin

Claims (7)

In single twist buncher type stranding machine,
A capstan that winds and feeds a strand of wire that enters along the rotation axis by rotation, and an exit guide that guides the strand from the feeding portion of the capstan to the rotation axis. A rotary feed device that revolves into
A winding spool shaft that is coaxially and rotatably disposed with the rotary feeding device;
A spool shaft rotating device for rotating the winding spool shaft;
A flyer-type winding device that rotates coaxially with the rotary feed device and winds the wire bundle guided to the rotary shaft by the outgoing guide around the winding spool shaft;
The rotary feeder, the flyer type winding device and the spool shaft rotating device are formed so as to be independently drivable.   The twisted wire machine according to claim 1, wherein an overtwist turbine device that can be driven independently is installed between the rotary feeding device and the flyer type winding device.   The stranding machine according to claim 1 or 2, wherein a strand forming unit for strands is installed in front of the rotary feeder.   The stranded wire machine according to any one of claims 1 to 3, which is used for manufacturing a steel cord.   A method for producing a stranded wire by twisting a strand of wire using the twisted wire machine according to claim 1, wherein the strand bundle is excessively added to the target number of twists by adding the number of twist returns to the target twist number. A method for producing a stranded wire, characterized in that after twisting with the number of twists, the flyer type winding device is used to twist back with the number of twists.   A method for producing a stranded wire by twisting a strand of wire using the stranding machine according to claim 2, wherein the over-twist is obtained by twisting the strand of wire with a target number of twists using the rotary feeder. A method for producing a stranded wire, wherein the turbine device is twisted with a number of twists and twisted back.   The manufacturing method of the strand wire of Claim 5 or 6 used for manufacture of a steel cord.

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