JP2014133673A - Fiber strand production apparatus and tape core wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber strand production apparatus capable of suppressing generation of twist of a fiber strand, and to provide a tape core wire.SOLUTION: A fiber strand production apparatus includes: a take-up roll for taking up a fiber strand formed by coating with a resin, the outer periphery of a fiber bare wire drawn from a base material for a multicore fiber; a twist dissolution pulley provided rotatably on the furthermore upstream side than the take-up roll, and having a rotating trunk part abutting on the fiber strand; a twist detection part for detecting twist generated in the fiber strand; and a control mechanism for moving a rotation shaft of the twist dissolution pulley so as to dissolve twist generated in the fiber strand based on a detection result by the twist detection part.

Description

  The present invention relates to a fiber strand manufacturing apparatus and a tape core.

  The fiber strand is formed by a fiber strand manufacturing apparatus that coats the outer periphery of a bare fiber drawn from a base material with a resin. In recent years, it has been required to increase the capacity of such fiber strands. In order to meet this requirement, for example, a multi-core fiber bare wire (hereinafter also referred to as a multi-core fiber) in which a plurality of cores (for example, 7 or more) cores are inserted in the bare fiber has been proposed (for example, Patent Documents). 1).

  Since such a multi-core fiber is configured so that each core transmits different information, the transmission capacity of the fiber strand can be increased by the number of cores included in the multi-core fiber. Therefore, for example, when connecting a tape core wire (multi-core fiber) formed by coating the outer periphery of a group of fiber strands in which a plurality of fiber strands are arranged in a line with a resin, and other interfaces, When connecting the core wires, each core in the fiber strand needs to be connected to a predetermined position (connection destination).

  However, when the fiber strand is formed by the fiber strand manufacturing apparatus, the fiber strand may be twisted. As shown in FIG. 5, for example, as shown in FIG. 5, the position of each core 15 'may be shifted in both cross-sections of the tape core wire 32'. It was. That is, for example, when six cores 15a ′ to 15f ′ are inserted in the fiber strand 17 ′, the position of the core 15a ′ in one cross section may not match the position of the core 15a ′ in the other cross section. there were. When connecting such a tape core wire 32 'to an interface or the like, for example, it is necessary to confirm the positions of the cores 15a' to 15f 'of the tape core wire 32', so that the efficiency of the connection work is greatly reduced. There was a case. In addition, it may be difficult to connect each core 15 'to a predetermined position.

  Therefore, as a method of eliminating the twist generated in the fiber strand 17 ′ when the fiber strand 17 ′ is formed by the fiber strand manufacturing apparatus, for example, a resin coating that coats the outer periphery of the base material and the bare fiber with a resin By detecting the twist generated in the bare fiber with the twist detection part provided between the two parts and rotating the base material based on the detection result by the twist detection part to eliminate the twist generated in the bare fiber. There has been proposed a method for eliminating the twist generated in the fiber strand 17 '(see, for example, Patent Document 2).

JP 05-341147 A JP-A 64-14126

  However, in the method described in Patent Document 2, although twisting of the fiber strand 17 ′ can be eliminated, there is a case in which the axis of the running path of the bare fiber is generated because the base material is rotated. . As a result, the bare fiber is not drawn straight from the base material, and the roundness of the bare fiber may be reduced. Further, when the resin is coated on the outer periphery of the bare fiber, the resin is not uniformly coated in the circumferential direction of the bare fiber, and the roundness of the fiber strand 17 ′ may be deteriorated.

  Then, an object of this invention is to provide the fiber strand manufacturing apparatus which can solve the said subject, and can suppress generation | occurrence | production of the twist of a fiber strand, and a tape core wire.

In order to solve the above problems, the present invention is configured as follows.
According to the first aspect of the present invention, a winding roll for winding a fiber strand formed by coating an outer periphery of a bare fiber drawn from a base material for a multicore fiber with a resin, and the winding roll A twist-removing pulley that is rotatably provided on the upstream side and in which the rotating body abuts on the fiber element, a torsion detector that detects torsion generated in the fiber element, and a detection result by the torsion detector Based on this, there is provided a fiber strand manufacturing apparatus comprising: a control mechanism that moves a rotation shaft of the twist-removing pulley so as to cancel the twist generated in the fiber strand.

  According to the second aspect of the present invention, the torsion detector is provided between the torsion canceling pulley and the take-up roll, and the movement of the rotation shaft of the torsion canceling pulley is feedback-controlled. A fiber strand manufacturing apparatus according to an aspect is provided.

  According to the third aspect of the present invention, a resin coating portion provided on the upstream side of the twist eliminating pulley, the outer periphery of the bare fiber is covered with the resin, the resin coating portion and the twist eliminating pulley. There is provided a fiber strand manufacturing apparatus according to the first or second aspect, comprising a turn pulley that is rotatably provided between and a turn pulley that abuts against the fiber strand.

  According to a fourth aspect of the present invention, there is provided the fiber strand manufacturing apparatus according to the third aspect, wherein the rotational axis of the twist eliminating pulley is perpendicular to the rotational axis of the turn pulley.

  According to the fifth aspect of the present invention, a fiber strand group in which a plurality of the fiber strands wound by the fiber strand manufacturing apparatus according to any one of the first to fourth aspects are arranged at a predetermined pitch. And a tape core wire provided with a resin layer covering the outer periphery of the fiber strand group.

  ADVANTAGE OF THE INVENTION According to this invention, the fiber strand manufacturing apparatus which can suppress generation | occurrence | production of the twist of a fiber strand, and a tape core wire can be obtained.

It is a schematic block diagram of the fiber strand manufacturing apparatus concerning one Embodiment of this invention. It is the top view and oblique perspective view of the preform | base_material used for the fiber strand manufacturing apparatus concerning one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows a mode that the twist which arose in the fiber strand was eliminated using the twist elimination pulley with which the fiber strand manufacturing apparatus concerning one Embodiment of this invention is equipped, (a) And (b) It is a figure which shows a mode that the cancellation twist of a counterclockwise direction is provided to a line | wire, (c) And (d) is a figure which shows a mode that the cancellation twist of a clockwise direction is provided to a fiber strand. It is the perspective view and both sectional drawing of the tape core wire concerning one Embodiment of this invention. It is the perspective view and both sectional drawing of the conventional tape core wire.

(1) Structure of fiber strand manufacturing apparatus First, the structure of the fiber strand manufacturing apparatus 100 which concerns on this embodiment is demonstrated, referring FIGS. 1-3.

(Drawing part)
As shown in FIG. 1, the fiber strand manufacturing apparatus 100 according to the present embodiment includes a drawing unit 12 that forms a bare fiber 11 by heating (melting) a base material 10 to draw. The drawing unit 12 includes a heating unit 13 that heats and melts the base material 10. The drawing unit 12 is configured to form the bare fiber 11 by drawing the base material 10 heated and melted by the heating unit 13 vertically downward.

  As the base material 10, for example, as shown in FIG. 2, a base material for a multi-core fiber formed by inserting a core 15 (in this embodiment, for example, six cores 15 a to 15 f) into a clad material 14. Can be used. As the cladding material 14, for example, quartz glass, fluororesin, polymethylpentene, polyvinyl acetate, ethylene / polyvinyl acetate copolymer, polyacetal, or the like can be used. As the core 15, for example, glass, polymethyl methacrylate resin, polystyrene resin, polycarbonate resin, or the like can be used.

(Resin coating)
As shown in FIG. 1, on the downstream side of the drawing portion 12, the outer periphery of the bare fiber 11 formed by the drawing portion 12 is covered with a resin 16 (see FIG. 4) to form a fiber strand 17. A resin coating 18 is provided. The resin coating portion 18 includes a resin coating device 19 that applies the resin 16 to the outer periphery of the bare fiber 11, and a curing furnace 20 that cures the resin 16 applied to the outer periphery of the bare fiber 11. Yes. As the curing furnace 20, for example, an ultraviolet irradiation furnace or a heating furnace can be used. As the resin 16 applied to the outer periphery of the bare fiber 11, for example, an ultraviolet curable resin, a thermosetting resin, or the like can be used. It is more preferable that the color of the resin 16 is transparent or translucent.

(Winding roll)
A winding roll 21 is provided at the end of the fiber strand manufacturing apparatus 100. The winding roll 21 is configured to wind the fiber strand 17 at a predetermined speed. The winding roll 21 is configured to adjust the traveling speed of the fiber strand 17 by adjusting the winding speed (rotational speed).

(Twisted pulley)
On the downstream side of the resin coating portion 18, a twist eliminating pulley 22 in which the rotating body abuts the fiber strand 17 is rotatably provided. The twist eliminating pulley 22 is provided with a groove 23, and the fiber strand 17 is configured to travel in the groove 23.

  The twist eliminating pulley 22 is configured to be able to move the rotation shaft 22 a of the twist eliminating pulley 22. That is, the twist eliminating pulley 22 is configured to be able to move the rotary shaft 22 a so that the surface of the fiber strand 17 that contacts the rotating body moves along the fiber strand 17. Accordingly, the twist eliminating pulley 22 can impart to the fiber strand 17 a twist (hereinafter also referred to as “cancellation twist”) that eliminates the twist generated in the fiber strand 17. Twist can be eliminated.

  That is, for example, the direction parallel to the winding direction of the fiber strand 17 is the x axis, the direction parallel to the rotation axis 21a of the winding roll 21 is the y axis, and the direction perpendicular to the x axis and the y axis is In the case of the z-axis, as shown in FIGS. 3A and 3B, by rotating the rotation shaft 22a of the twist eliminating pulley 22 counterclockwise on the xz plane, the fiber strand 17 is rotated counterclockwise. It is configured to give direction twisting. Thereby, the clockwise twist produced in the fiber strand 17 can be eliminated. Further, for example, as shown in FIGS. 3C and 3D, the twisting pulley 22 is rotated clockwise on the xz plane so that the twisted fiber 17 is twisted in the clockwise direction. Is configured to give. Thereby, the twist of the counterclockwise direction which arose in the fiber strand 17 can be eliminated. The amount by which the rotation shaft 22a of the twist eliminating pulley 22 is moved (the movement amount (rotation amount) of the rotation shaft 22a in the xz plane) is controlled according to the detection result detected by the torsion detection unit 24 described later.

(Torsion detector)
As shown in FIG. 1, a twist detection unit 24 that detects twist generated in the fiber strand 17 is provided downstream of the twist cancellation pulley 22, that is, between the twist cancellation pulley 22 and the winding roll 21. Yes. The twist detection unit 24 is configured to detect the twist amount, twist direction, and the like of the twist generated in the fiber strand 17.

  The twist detection unit 24 includes, for example, an illumination device 25 that irradiates the fiber strand 17 with illumination light, and an imaging device 26 that is provided so as to face the illumination device 25. The torsion detector 24 shoots the shadow of the core 15 in the fiber strand 17 formed by irradiating the fiber strand 17 with the illumination device 25, and detects the displacement of the shadow of the core 15. The twist generated in the fiber strand 17 is detected. The illumination device 25 is provided so as to irradiate the fiber strand 17 with illumination light from the side of the fiber strand 17. Thereby, the shadow of the core 15 inserted in the fiber strand 17 can be formed. The imaging device 26 is configured to photograph the shadow of the core 15 in the fiber strand 17 formed by the lighting device 25. As the imaging device 26, for example, a camera or the like can be used. In addition, a display unit 27 such as a monitor may be connected to the imaging device 26.

  When a base material for a multi-core fiber is used as the base material 10, a plurality of cores 15 (for example, six cores 15a to 15f as shown in FIG. 2) are inserted into the fiber strand 17. Therefore, when the illumination light is irradiated onto the fiber strand 17 by the illumination device 25, shadows of the plurality of cores 15 are formed. At this time, the twist detection unit 24 detects the amount of shift of the shadow position of at least one core 15 among the shadows of the plurality of cores 15 formed by the lighting device 25, thereby generating the fiber strand 17. It is configured to detect a twist (particularly a twist amount). Further, the twist detection unit 24 may be configured to detect a twist generated in the fiber strand 17 by detecting an interval between shadows of adjacent cores 15 and detecting a displacement amount of the interval. .

  In addition, the twist detection unit 24 continuously (always) monitors the shadow of the core 15 in the fiber strand 17 formed by the lighting device 25, so that the shadow of the core 15 is displaced, that is, the fiber. The twisted direction of the strand 17 is configured to be detected.

(Control mechanism)
A control mechanism 28 is connected to the twist eliminating pulley 22 and the twist detecting unit 24. The control mechanism 28 is configured to move (tilt) the rotating shaft 22 a of the twist eliminating pulley 22 based on the detection result by the twist detecting unit 24. That is, the control mechanism 28 adjusts the direction and amount of movement of the rotating shaft 22a of the twist eliminating pulley 22 based on the detection result by the twist detecting unit 24 to move the rotating shaft 22a of the twist eliminating pulley 22. The control mechanism 28 is configured to perform feedback control of the rotation shaft 22a of the twist eliminating pulley 22.

(Turn pulley)
A turn pulley 29 is provided between the resin coating 18 and the twist eliminating pulley 22 so as to be rotatable around a rotation shaft 29a. The turn pulley 29 is provided in such a manner that the rotating drum portion comes into contact with the fiber strand 17. The turn pulley 29 is provided such that the rotation shaft 29 a of the turn pulley 29 is perpendicular to the shortest travel path of the fiber strand 17. The turn pulley 29 is provided so as to change the traveling direction of the fiber strand 17. By providing the turn pulley 29 in this way, the fiber drawing production device 100 can be divided into a twist eliminating portion 30 downstream of the turn pulley 29 and a fiber strand forming portion 31 upstream of the turn pulley 29. it can.

  The turn pulley 29 is provided such that the rotation shaft 29 a of the turn pulley 29 is perpendicular to the rotation shaft 22 a of the twist elimination pulley 22. That is, the rotation shaft 29 a of the turn pulley 29 is provided so as to be parallel to the rotation shaft 21 a (y-axis direction) of the winding roll 21. Thus, by moving the rotation shaft 22a of the twist elimination pulley 22, the deviation of the axis of the traveling path of the fiber strand 17 generated in the twist elimination section 30 (hereinafter also referred to as “axial deviation of the fiber strand 17”). However, it can suppress that it is transmitted to the fiber strand forming part 31.

  That is, if the rotation shaft 22a of the twist eliminating pulley 22 is perpendicular to the rotation shaft 29a of the turn pulley 29, when the rotation shaft 22a of the twist eliminating pulley 22 is moved, the fiber strand 17 has an axis in the z-axis direction. Deviation may occur. At this time, in the fiber strand forming part 31, even if the fiber strand 17 is pulled in the z-axis direction (the drawing direction of the bare fiber 11), the fiber strand 17 is in a direction other than the z-axis direction. Pulling is suppressed. Therefore, it is possible to prevent the fiber strand 17 from being displaced in the fiber strand forming portion 31. Thereby, the bare fiber 11 is drawn straight from the base material 10 in the vertically downward direction (z-axis direction), and the roundness of the bare fiber 11 can be maintained. Further, the resin coating portion 18 can uniformly coat the outer periphery of the bare fiber 11 with resin.

(2) Manufacturing method of fiber strand Then, one Embodiment of the manufacturing method which manufactures the fiber strand 17 using the above-mentioned fiber strand manufacturing apparatus 100 is described. Here, the case where the base material 10 for multi-core fibers formed by inserting a plurality of cores 15 into the clad material 14 is used as an example.

(Drawing process)
First, for example, the lower end portion of the base material 10 is heated to about 2000 ° C. by the heating unit 13 to melt the base material 10. Then, the bare fiber 11 is formed by drawing the base material 10 heated and melted. The cross-sectional shape of the drawn bare fiber 11 is substantially similar to the cross-sectional shape of the base material 10.

(Resin coating process)
Subsequently, the bare fiber 11 is sent to the resin coating device 19, and the resin 16 is applied to the outer periphery of the bare fiber 11 so as to be uniform in the circumferential direction of the bare fiber 11. The bare fiber 11 coated with the resin 16 is sent to the curing furnace 20 to cure the resin 16 and form the fiber strand 17.

(Twist elimination process)
The fiber strand 17 formed through the resin coating process is sent to the twist eliminating pulley 22 and the twist detecting unit 24 through the turn pulley 29. Then, the twist generated in the fiber strand 17 is detected by the twist detection unit 24, and the rotation shaft 22a of the twist eliminating pulley 22 is moved based on the detection result by the twist detection unit 24, and the twist generated in the fiber strand 17 is detected. It resolves automatically.

  That is, first, the illumination device 25 provided in the twist detection unit 24 irradiates the fiber strand 17 with illumination light from the side of the fiber strand 17 to form a shadow of the core 15 in the fiber strand 17. The shadow of the core 15 formed is photographed by the imaging device 26 provided in the twist detection unit 24 to detect the displacement of the shadow of the core 15. Based on the detected shadow displacement of the core 15, the twist generated in the fiber strand 17 is detected. And based on the detection result by the twist detection part 24, the twist axis | shaft which arose in the fiber strand 17 is automatically eliminated by moving the rotating shaft 22a of the twist elimination pulley 22 and giving cancellation twist to the fiber strand 17. FIG.

(Winding process)
The fiber strands 17 that have passed through the twist-removing pulley 22 and the twist-detecting unit 24 and whose twist has been eliminated are sequentially wound by the winding roll 21.

(3) Tape Core Wire Next, a tape core wire using the fiber strand 17 formed by the above-described fiber strand manufacturing apparatus 100 will be described mainly with reference to FIG. FIG. 4 is a perspective view and both cross-sectional views of the tape core wire 32 according to the present embodiment.

  As shown in FIG. 4, the tape core wire 32 includes a fiber strand group 33 in which a plurality of (for example, two) fiber strands 17 wound by the fiber strand manufacturing apparatus 100 are arranged at a predetermined pitch, and a fiber strand. And a resin layer 34 covering the outer periphery of the line group 33. The resin layer 34 is made of, for example, a resin such as an ultraviolet curable resin or a thermosetting resin. Thereby, the position of the core 15 can be matched in both cross sections of the tape core wire 32. That is, for example, the position of the core 15a in one cross section can coincide with the position of the core 15a in the other cross section. Therefore, for example, when connecting the tape core 32 and the interface or the like, the cores 15a to 15f can be easily connected to predetermined locations, and it is not necessary to confirm the position of each core of the tape core 32. Therefore, the efficiency of connection work can be improved.

  The tape core wire 32 travels in a state in which two winding rolls 21 around which the fiber strands 17 are wound by the fiber strand manufacturing apparatus 100 are arranged in a line and the two fiber strands 17 are arranged in parallel. Then, the resin is applied so as to cover the outer periphery of the fiber strand group 33 with a resin coating device, and then the resin is cured with a curing device to form the resin layer 34.

(4) Effects According to the Present Embodiment According to the present embodiment, one or more effects described below are exhibited.

(A) According to the present embodiment, the twist eliminating pulley 22 is provided such that the rotating body portion contacts the fiber strand 17. Further, a twist detection unit 24 that detects twist generated in the fiber strand 17 is provided. And based on the detection result by the twist detection part 24, it is comprised so that the rotating shaft 22a of the twist elimination pulley 22 may be moved. Thereby, it is possible to give the fiber strand 17 a cancellation twist, and it is possible to automatically eliminate the twist generated in the fiber strand 17.

(B) According to the present embodiment, the turn pulley 29 is provided between the resin coating portion 18 and the twist eliminating pulley 22 so as to be rotatable. As a result, the fiber strand manufacturing apparatus 100 can be divided into a twist eliminating portion 30 downstream of the turn pulley 29 and a fiber strand forming portion 31 upstream of the turn pulley 29. Accordingly, even if the fiber strand 17 is misaligned in the twist relieving unit 30 by moving the rotation shaft 22a of the twist eliminating pulley 22, the fiber strand 17 is displaced by the fiber strand forming portion 31. It can be suppressed to be transmitted to. As a result, the roundness of the bare fiber 11 can be maintained, and the fiber 17 can be formed by uniformly coating the outer periphery of the bare fiber 11 with resin.

(C) According to this embodiment, the rotation shaft 22 a of the twist eliminating pulley 22 is perpendicular to the rotation shaft 29 a of the turn pulley 29. Thereby, by moving the rotating shaft 22 a of the twist eliminating pulley 22, it is possible to further suppress the axial deviation of the fiber strand 17 generated in the twist eliminating portion 30 from being transmitted to the fiber strand forming portion 31. Therefore, the roundness of the bare fiber 11 and the roundness of the fiber 17 can be further improved.

(D) According to the present embodiment, the twist detection unit 24 is provided between the twist elimination pulley 22 and the winding roll 21. The movement of the rotary shaft 22a of the twist eliminating pulley 22 is feedback-controlled by the control mechanism 28. Thereby, it can send to the winding roll 21 in the state which canceled the twist which arose in the fiber strand 17 more.

(Other embodiments of the present invention)
As mentioned above, although one Embodiment of this invention was described concretely, this invention is not limited to the above-mentioned embodiment, In the range which does not deviate from the summary, it can change suitably.

  In the above-described embodiment, the rotation shaft 22a of the twist eliminating pulley 22 is perpendicular to the rotation shaft 21a of the take-up roll 21 and the rotation shaft 29a of the turn pulley 29. However, the present invention is not limited to this. That is, for example, the rotation shaft 22 a of the twist eliminating pulley 22 may be parallel to the rotation shaft 21 a of the winding roll 21 and the rotation shaft 29 a of the turn pulley 29.

  In the above-described embodiment, the case where the twist detection unit 24 is provided between the twist eliminating pulley 22 and the take-up roll 21 and feedback movement of the rotation shaft 22a of the twist eliminating pulley 22 has been described, but the present invention is not limited thereto. Is not to be done. That is, the twist detection unit 24 may be provided, for example, between the twist elimination pulley 22 and the turn pulley 29, and the movement of the rotation shaft 22a of the twist elimination pulley 22 may be feedforward controlled. Moreover, the twist detection part 24 may be provided so that the movement of the rotating shaft 22a of the twist elimination pulley 22 may be feedforward controlled and feedback controlled.

  In the above-described embodiment, the twist detection unit 24 is configured by the illumination device 25 and the imaging device 26, but is not limited thereto. That is, the twist detection unit 24 may be configured to detect, for example, a twist generated in the fiber strand 17 by providing a polarizing plate and measuring the displacement of the polarized light.

  In the above-described embodiment, the case where one turn pulley 29 is provided has been described, but the present invention is not limited to this. That is, two or more turn pulleys 29 may be provided.

  In the above-described embodiment, the base material 10 is a base material for a multi-core fiber in which the six cores 15a to 15f are inserted into the clad material 14, but the base material 10 is not limited to this. That is, as the base material 10, a base material for a multi-core fiber in which two to five cores 15 are inserted into the clad material 14, or a multi-core fiber in which seven or more cores 15 are inserted into the clad material 14. A base material may be used.

  In the above-described embodiment, the fiber strand group 33 is formed by arranging the two fiber strands 17. However, the present invention is not limited to this. That is, the fiber strand group 33 may be formed by arranging three or more fiber strands 17 in a line at a predetermined pitch.

  In the above-described embodiment, the tape core wire 32 is formed by arranging a plurality of fiber strands 17 in a line at a predetermined pitch. However, the present invention is not limited to this. That is, for example, a plurality of fiber strands 17 may be aligned and laminated to form a fiber cable having a circular cross section.

DESCRIPTION OF SYMBOLS 100 Fiber strand manufacturing apparatus 10 Base material 11 Fiber bare wire 17 Fiber strand 21 Winding roll 22 Twist cancellation pulley 22a Rotation shaft of twist cancellation pulley 24 Torsion detection part 28 Control mechanism

Claims (5)

A winding roll for winding up a fiber strand formed by coating the outer periphery of a bare fiber drawn from a base material for a multi-core fiber with a resin;
A twist-removing pulley that is rotatably provided on the upstream side of the take-up roll, and in which a rotating body abuts the fiber strand;
A twist detection unit for detecting twist generated in the fiber strand;
A fiber strand manufacturing apparatus comprising: a control mechanism that moves a rotating shaft of the twist-removing pulley so as to eliminate the twist generated in the fiber strand based on a detection result by the twist detection unit. 2. The fiber strand according to claim 1, wherein the twist detecting unit is provided between the twist eliminating pulley and the winding roll, and the movement of the rotation shaft of the twist eliminating pulley is feedback-controlled. manufacturing device. A resin-coated portion provided on the upstream side of the twist-eliminating pulley, and covering an outer periphery of the bare fiber with the resin;
The fiber element according to claim 1, further comprising: a turn pulley that is rotatably provided between the resin coating portion and the twist eliminating pulley, and a rotating pulley abuts on the fiber strand. Wire manufacturing equipment. The fiber strand manufacturing apparatus according to claim 3, wherein a rotation axis of the twist eliminating pulley is perpendicular to a rotation axis of the turn pulley. A fiber strand group in which a plurality of the fiber strands wound by the fiber strand manufacturing apparatus according to any one of claims 1 to 4 are arranged at a predetermined pitch;
A tape core wire comprising: a resin layer covering an outer periphery of the fiber strand group.

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