Winding device and winding method for reinforced fiber bundle

Abstract

This winding device for a reinforced fiber bundle comprises: an unwinding unit that has a bobbin or a reel and supplies a reinforced fiber bundle wound around the bobbin or the reel while applying a tensile stress thereto; a plurality of members that constitute a path for conveying the reinforced fiber bundle; and a winding unit that comprises a core material and a mechanism for supporting and rotating the core material around the axis thereof to wind the reinforced fiber bundle on the outer periphery thereof. When the path is defined as a yarn path and the plurality of members are defined as a yarn path constituting unit, the member in the yarn path constituting unit that is positioned closest to the core material on the yarn path is a roller. When the roller is defined as an F-roller, the F-roller is connected to a rotational resistance applying means, and the distance from the F-roller to the core material on the yarn path is 10 mm or less.　Provided are a winding device and a method therefor capable of supplying a reinforced fiber bundle wound in advance on a bobbin or a reel and winding the reinforced fiber bundle on a core material in a state in which high process tension is applied to the reinforced fiber bundle.

Description

Reinforced fiber bundle winding device and winding method

[0001] The present invention relates to a winding device for winding a reinforcing fiber bundle around a core material while applying process tension to the bundle, and a winding method using the device.

[0002] In recent years, there has been a demand for motors with higher rotation speeds to improve their performance. Such motors include SPM (Surface Permanent Magnet) motors in which permanent magnets are arranged on the outer periphery of the rotor, and IPM (Internal Permanent Magnet) motors in which permanent magnets are embedded in the rotor. However, when a motor is rotated at high speeds, centrifugal force can cause the permanent magnets arranged on the outer periphery to fall off the rotor, or the rotor itself can be damaged.

[0003] In order to suppress deformation and damage caused by high-speed rotation of a motor, Patent Document 1 discloses a method of tightly winding a reinforcing thread around the outer periphery of a rotor of a rotating machine (corresponding to the motor in this disclosure) with tension applied in advance.

[0004] Patent Document 2 also discloses a device for controlling the tension applied to a tow prepreg (a bundle of reinforcing fibers containing resin) during the conveying process so that the tension gradually increases from upstream to downstream during the conveying process, in order to prevent overlapping reinforcing fibers from wedging together in the thickness direction of the tow prepreg wound on the bobbin when the tow prepreg is unwound from the bobbin and to convey the tow prepreg with a large tension. Specifically, the device exemplifies that the tension applied to the tow prepreg at the most downstream conveying roller is five times that applied to the tow prepreg at the most upstream conveying roller, and further exemplifies a maximum tension of 1.5 kgf (approximately 15 N).

[0005] JP 60-102850 A JP 2021-151770 A

[0006] However, the invention described in Patent Document 1 does not mention the specific tension value or technique for pre-tensioning the carbon fiber when tightly winding it around the outer periphery of the rotor. Therefore, even if this document is referred to, it is not possible to set the necessary tension, and as a result, it is not possible to solve the problem of limited motor rotation speed.

[0007] Furthermore, even in the invention described in Patent Document 2, when considering the prevention of deformation and damage to the motor due to high-speed rotation, the tension applied to the material is still insufficient, and the problem of limited motor rotation speed cannot be solved.

[0008] In view of this situation, the problems to be solved in this disclosure are as follows.

[0009] That is, the object is to provide an apparatus and method capable of supplying a reinforcing fiber bundle that has been wound in advance on a bobbin or reel, and winding the reinforcing fiber bundle around a core material while applying a high process tension to the reinforcing fiber bundle.

[0010] The present disclosure can be realized in the following forms: (1) According to one form of the present disclosure, there is provided a winding device including: an unwinding section having a bobbin or a reel that applies tensile stress to a reinforced fiber bundle wound around the bobbin or the reel and supplies the reinforced fiber bundle, a plurality of members (hereinafter referred to as yarn path constituent equipment sections) that configure a path for transporting the reinforced fiber bundle (hereinafter referred to as a yarn path), and a winding section that includes a core material and a mechanism that supports the core material, rotates it about its axis, and winds the reinforced fiber bundle around its outer periphery, wherein the member of the yarn path constituent equipment sections that is closest to the core material on the yarn path is a roller (hereinafter referred to as an F roller), the F roller is connected to a rotation resistance applying means, and the distance from the F roller to the core material on the yarn path is 10 mm or less.

[0011] Here, in the present disclosure, it may be said that it is a prerequisite that the core material and the F roller have the same or approximately the same axial direction.

[0012] In this aspect, the yarn guide component unit can significantly increase the conveying tension applied to the reinforced fiber bundle when it is wound around the core material, relative to the tensile stress applied to the reinforced fiber bundle in the unwinding section. Furthermore, since the F roller is connected to the rotation resistance applying means and the distance from the F roller to the core material on the yarn guide is 10 mm or less, the length of the reinforced fiber bundle between the F roller and the core material can be shortened. As a result, the reinforced fiber bundle can be wound around the core material while applying a stable high tension. (2) The winding device of the above aspect can be configured such that the F roller and the core material are close to each other and can be moved to a position where they press against each other via the traveling reinforced fiber bundle. (3) The winding device of the aspect (2) can be configured such that it includes a contact force adjustment mechanism that adjusts the force (contact force) between the F roller and the core material pressing against each other via the reinforced fiber bundle.

[0013] By adopting such an embodiment, the contact force between the F roller and the core material can be maintained at a desired value regardless of the weight of the F roller or the outer diameter of the core material, and the out-of-plane load generated on the reinforcing fiber bundle in the region where the F roller and the core material press against each other can be maintained and adjusted to a desired value. As a result, excessive compressive stress can be prevented from being applied to the reinforcing fiber bundle in that region, and as a result, the reinforcing fiber bundle can be wound around the core material with a high conveying tension while preventing yarn breakage. (4) In the winding device according to the embodiment (2) or (3) above, the yarn guide component unit may include a roller other than the F roller, and the roller located immediately before the F roller on the path of the reinforcing fiber bundle is designated as the sF roller. When the core material is viewed in the cross-sectional direction, a line segment A geometrically connecting the axis of the core material and the axis of the F roller and a line segment B on the yarn guide from the sF roller to the F roller are configured to be perpendicular to each other, and the length of the region in the yarn guide where the F roller and the reinforcing fiber bundle contact each other is configured to be half the outer circumferential length of the F roller and within a range of 5% above and below that.

[0014] Here, no components constituting the yarn guide configuration device are usually present between the sF roller and the F roller. By adopting such an embodiment, the direction of the force applied to the F roller due to the conveying tension of the reinforcing fiber bundle can be made perpendicular to the direction of the force pressing between the F roller and the core material, while ensuring a contact area between the F roller and the reinforcing fiber bundle. As a result, even if the conveying tension of the reinforcing fiber bundle fluctuates, the force pressing between the F roller and the core material is not affected. In other words, it is possible to more easily control the load in the fiber bundle thickness direction that occurs on the reinforcing fiber bundle in the area where the F roller and the core material press against each other. (5) In the winding device according to any of the embodiments (1) to (4) above, the winding unit may have a mechanism for reciprocating the core material in the axial direction, and the F roller may reciprocate in translation with the reciprocating motion of the core material.

[0015]

[0013] By adopting such an embodiment, it is possible to suppress the generation of a relative velocity between the core material and the F roller. As a result, even when a so-called reciprocating traverse operation, in which the core material is reciprocated along the rotation axis to wind the reinforcing fiber bundle around the entire outer periphery of the core material, whose dimension in the rotation axis direction is larger than the dimension in the width direction of the reinforcing fiber bundle, is performed, it is possible to suppress the generation of forces other than tensile stress in the reinforcing fiber bundle, suppress yarn breakage, and / or stabilize the running path of the reinforcing fiber bundle. (6) According to another aspect of the present disclosure, there is provided a winding method for a reinforcing fiber bundle, in which a reinforcing fiber bundle stored on a bobbin or a reel is drawn out while applying tensile stress, transported along a yarn path by a yarn path component unit, and then wound around a core material, wherein the winding method applies rotational resistance to the F roller to increase the tensile stress generated in the reinforcing fiber bundle, and the distance from the F roller to the core material on the yarn path is 10 mm or less. (7) In the winding method for a reinforcing fiber bundle according to the above aspect, when the core material is viewed in the cross-sectional direction, the reinforcing fiber bundle may cross a line segment A that geometrically connects the axial center of the core material and the axial center of the F roller, and the F roller and the core material may press against each other via the running reinforcing fiber bundle. (8) In the winding method for a reinforcing fiber bundle according to the above aspect (7), the direction of the force generated in the F roller due to the tensile stress Tf and / or Tf1 generated in the reinforcing fiber bundle may be orthogonal to the direction of the force generated in the F roller when the F roller and the core material press against each other via the running reinforcing fiber bundle. (9) In the winding method for a reinforcing fiber bundle according to the above aspect (7) or (8), the core material may be rotated around its axis, and the core material and the F roller may be reciprocated so as not to generate a relative velocity in the direction of the rotation axis of the core material. (10) In a winding device having a configuration according to any one of (1) to (6) above, an end member may be provided on the outer peripheral surface of the core material or on both ends in the direction of the rotation axis, protruding radially outward from the outer diameter of the core material and supported independently so as not to be linked to the rotation of the core material, and the end member may have a shape in which a portion of the outer peripheral surface is missing, and the missing portion does not protrude radially outward from the outer diameter of the core material, and does not overlap with the F roller when viewed in the axial direction of the core material.(11) In the winding device according to (10) above, the winding unit may have a mechanism for reciprocating the core material along its rotational axis relative to the F roller, and the end member may be supported so as to move in conjunction with the reciprocating movement of the core material along the rotational axis. (12) In the winding device according to (10) or (11) above, the end member may have a mechanism for fastening to the core material. (13) In the winding device according to any of (10) to (12) above, the winding unit may have a reciprocating mechanism for fastening the end member to the core material. The reciprocating mechanism may include ... (14) In the winding method for a reinforcing fiber bundle according to any one of (7) to (9) above, end members are provided adjacent to each end of the region where the reinforcing fiber bundle is wound around the core material, protruding radially outward from the outer diameter of the core material and supported independently so as not to be interlocked with the rotation of the core material, and the end members have a shape in which a portion of the outer surface is missing, so that the missing portion does not protrude radially outward from the outer diameter of the core material and does not overlap with the F roller when viewed from the axial direction of the core material. (15) In the winding method according to any one of (14) above, the winding unit is reciprocated in the direction of the rotation axis of the core material, and the end members are reciprocated in conjunction with the core material. (16) Also provided is a method for reinforcing a core material, in which the end members according to any one of (14) above are fastened to the core material after carrying out the winding method according to any one of (15) above. (17) In the method of reinforcing a core material in the form according to (16) above, after carrying out the winding method according to (15) above, a complementary member that complements the missing portion of the end member can be attached to the core material or the end member, and the complementary member can complement the portion of the missing portion of the end member that does not protrude radially outward from the outer diameter of the core material around the entire outer periphery of the core material.(18) In the winding method of a reinforced fiber bundle according to any one of (7) to (9) above, the core material is rotated around its axis, and the core material and the F roller are reciprocated at a relative speed in the direction of the rotation axis of the core material. In addition, on the outer peripheral surface of the core material, areas where the reinforced fiber bundle is not wound are provided on both sides of the area where the reinforced fiber bundle is wound, and the width of the surface of the F roller that comes into contact with the reinforced fiber bundle is larger than the width of the reinforced fiber bundle but is not more than 1.5 times the width of the reinforced fiber bundle.

[0016] According to the present invention, it is possible to provide an apparatus and method that can supply a reinforcing fiber bundle that has been pre-wound on a bobbin or reel, and wind the reinforcing fiber bundle around a core material while applying a high process tension to the reinforcing fiber bundle.

[0017] Schematic diagram showing a state in which a reinforced fiber bundle 01 is conveyed between guide rollers 71 and 72 of a winding device 100 according to the present embodiment; Winding device 101, which is an embodiment different from the winding device 100; Winding device 102, which is an embodiment different from the winding devices 100 and 101; Yarn path near the F roller 54 in the winding device 102; Winding device 103, which is an embodiment different from any of the winding devices 100, 101, and 102; Cross-sectional shape perpendicular to the rotation axis of the core material 03; Flowchart showing a method for producing a fiber composite material; Winding device 104, which is an embodiment different from any of the winding devices 100, 101, 102, and 103; Schematic diagram of the core material 03 and its peripheral members as viewed from the rotation axis direction; Winding device 105, which is another embodiment different from any of the winding devices 100, 101, 102, 103, and 104; Top view of the winding section 6 and the F roller 54 in the winding device 105

[0018] The present invention will be described below with reference to the drawings as appropriate for ease of understanding, but the present invention is not limited by these drawings in any way. Furthermore, the description of the specific embodiments shown in the drawings can also be understood as a description of the present invention as a general concept. A1. Configuration and Function of Winding Device: FIG. 1 shows a winding device 100 in this embodiment. Note that none of the drawings attached to this specification accurately reflect the dimensions of the winding device or the reinforcing fiber bundle. The winding device 100 is a device that pulls out the reinforcing fiber bundle 01 from a bobbin 02 on which the reinforcing fiber bundle 01 is wound, transports it, and then winds it around a core material 03.

[0019] In this specification, the reinforcing fiber bundle 01 is a fiber bundle containing reinforcing fibers that are substantially continuous along its longitudinal direction. Here, "substantially continuous" refers to a state in which, when a reinforcing fiber bundle of a certain length is observed, the average length of each reinforcing fiber single yarn that constitutes the bundle is 90% or more of the length of the reinforcing fiber bundle. The reinforcing fiber bundle may have a so-called "yarn breakage defect" in which the length of some reinforcing fiber single yarns is shorter than the length of the reinforcing fiber bundle, or may have a so-called "yarn slack defect" in which the length of some reinforcing fiber single yarns is longer than the length of the reinforcing fiber bundle.

[0020] The winding device 100 has, in order along the travel path of the reinforced fiber bundle 01 in the device, an unwinding section 4, a yarn path configuration device section 5, a winding section 6, and a control device (not shown).

[0021] More specifically, the winding device 100 has: a bobbin 02 around which the reinforced fiber bundle 01 is wound, a bobbin holder 41 for supporting the bobbin 02, a tension control mechanism 42 connected to the bobbin holder 41 and controlling the conveying tension when the reinforced fiber bundle 01 is unwound from the bobbin 02; an unwinding section 4 having a plurality of rotatably supported guide rollers 421; a yarn path component section 5 having a plurality of tension applying rollers 51, a plurality of rotational resistance applying means 52 connected to each of the tension applying rollers 51, an F roller 54, and a rotational resistance applying means 53 connected to the F roller 54; and a winding section 6 having a cylindrical core material 03, a support mechanism 61 supporting the core material 03, and a rotation drive mechanism 62 connected to one end of the support mechanism 61. The F roller 54 may be considered to be a type of tension applying roller 51.

[0022] In this specification, when a symbol indicating each component is composed of multiple digits, the lower-order digit indicates that the symbol is an element constituting the device, mechanism, device section, or device group indicated by the upper-order digit. For example, the support mechanism 61, the rotation drive mechanism 62, and the translation drive mechanism 63 are all elements constituting the winding unit 6 whose symbol is the tens digit. Furthermore, the translation motor 631 and the linear guide 632 are all elements constituting the winding unit 6 whose symbol is the hundreds digit, and are also elements constituting the translation drive mechanism 63 whose symbol is the hundreds digit and the tens digit. In other words, the winding unit 6 is a device group consisting of multiple elements whose symbol is 6 in the most significant digit, and the unwinding unit 4 and the yarn guide component section 5 are also understood to have a similar format.

[0023] The unwinding section 4 supports the bobbin 02 around which the reinforced fiber bundle 01 is wound by a bobbin holder 41, and unwinds the reinforced fiber bundle 01 toward the winding section 6 while applying a constant conveying tension to the reinforced fiber bundle 01 by a tension control mechanism 42. More specifically, the bobbin holder 41 is a rod-shaped member that supports the bobbin 02 from the inner diameter side of a hole formed in the bobbin 02 and has a support portion that can fix the axial position of the bobbin 02. An unwinding motor (not shown) is connected to one end of the bobbin holder 41. The unwinding motor rotates the bobbin holder 41 in a direction that unwinds the reinforced fiber bundle 01 from the bobbin 02 in response to signals from the tension control mechanism 42 and a control unit (not shown). The tension control mechanism 42 includes a means for measuring the conveying tension of the reinforced fiber bundle 01 unwound from the bobbin 02, and controls the rotation speed of the unwinding motor via the control unit. More specifically, the tension control mechanism 42 has two rotatably supported guide rollers 421. A dancer roller 422 is disposed on the yarn path between them and is supported to be rotatable and movable up and down. The dancer roller 422 is connected to a weight and an elevation sensor (not shown). The conveying tension of the reinforced fiber bundle 01 passing through the tension control mechanism 42 is regulated by the weight connected to the dancer roller 422. If the conveying tension of the reinforced fiber bundle 01 fluctuates, the dancer roller 422 moves up and down, and the amount of elevation is detected by the elevation sensor. This acts to cancel out the fluctuation in the conveying tension by increasing or decreasing the rotation speed of the unwinding motor of the bobbin holder 41 via the control unit.

[0024] The yarn guide component unit 5 conveys the reinforced fiber bundle 01 to the winding unit 6 while increasing the conveying tension of the reinforced fiber bundle 01 due to the rotational resistance applied to each roller as the reinforced fiber bundle 01 passes through the plurality of tension applying rollers 51 and the F roller 54 provided near the winding unit 6. More specifically, the tension applying roller 51 has a yarn contact portion that contacts the reinforced fiber bundle 01 and a connection portion that connects to the rotational resistance applying means 52, and transmits the rotational resistance torque applied by the rotational resistance applying means 52 from the yarn contact portion to the reinforced fiber bundle 01. The rotational resistance applying means 52 is a brake mechanism formed by an electric motor, and generates torque resistance in the electric motor in response to a signal from a control unit (not shown), thereby generating rotational resistance in the direction opposite to the rotation of the tension applying roller 51. The F roller 54 is connected to the rotational resistance applying means 53 in a configuration similar to the connection between the tension applying roller 51 and the rotational resistance applying means 52, and is provided in close proximity to the core material 03 mounted on the winding unit 6.

[0025] In the winding section 6, the core material 03 is supported by support mechanisms 61, and the core material 03 is rotated by a rotation drive mechanism 62 connected to one of the support mechanisms 61, thereby winding the reinforcing fiber bundle 01 around the core material 03. More specifically, the support mechanism 61 is a cylindrical member having a flange portion near one end, and the flange portion has a hole for connecting to the core material 03, thereby coaxially connecting the core material 03 and the support mechanism 61. The other end of the support mechanism 61 has a key groove and a parallel key (not shown) for connecting to the rotation drive mechanism 62, and is configured to be able to transmit rotation generated by the rotation drive mechanism 62 to the core material 03. The rotation drive mechanism 62 is composed of a winding motor 621 and a connection mechanism 622, and the connection mechanism 622 connects the winding motor 621 to one end of the support mechanism 61. In the rotation drive mechanism 62, the winding motor 621 rotates according to a target speed input from a control unit not shown, and rotates the core material 03 around its axis at the desired rotation speed via the connection mechanism 622 and the support mechanism 61.

[0026] In this specification, the path along which the reinforcing fiber bundle is transported when the reinforcing fiber bundle is wound around the core material 03 via each roller along a predetermined path using a winding device is referred to as the yarn path in the winding device, and here the yarn path of the winding device 100 is referred to as the yarn path 100a, and the same applies to winding devices according to other embodiments described below. The path along which the reinforcing fiber bundle 01 is transported varies slightly during operation due to the traverse when the reinforcing fiber bundle 01 is pulled out from the bobbin 02 and the lifting and lowering of the dancer roller 422 due to fluctuations in the transport tension, but the part of the path that falls within the range of variation is referred to as the yarn path 100a. 2 , when considering two imaginary guide rollers 71 and 72 as an example of any component of the winding device 100 adjacent on the yarn path 100a, the distance on the yarn path 100a from the guide roller 71 to 72 is called the span 71-72 between the guide rollers 71 and 72, and similarly, the distance is expressed using the numeral of the reference numeral of the component that is the start point of the yarn path and the numeral of the reference numeral of the component that is the end point. If it is difficult to identify the yarn path 100a, the span 71-72 can be considered to be the shortest length of the tangents common to the guide rollers 71 and 72 when viewed in a direction perpendicular to the rotation axes of the guide rollers 71 and 72 at any moment during operation of the winding device 100. Here, when the core material 03 has a substantially cylindrical shape, the span 54-03 is the shortest length among the tangents between the F roller 54 and the circumscribing circle with the smallest diameter in the direction perpendicular to the rotation axis of the core material 03. However, as will be described later, when the F roller 54 and the core material 03 press against each other via the reinforcing fiber bundle and the distance in the yarn path from passing the F roller 54 to contacting the core material 03 is 0 mm, this does not apply, and the span 54-03 is set to 0 mm, which is the actual distance in the yarn path.

[0027] Here, in the winding device 100, it is important that the span 54-03 between the F roller 54 and the core material 03 is 10 mm or less and that the F roller 54 is connected to a rotational resistance imparting means 53 in order to wind the reinforcing fiber bundle 01 around the core material 03 while applying a high tensile stress to the bundle.

[0028] This is because keeping the span 54-03 short can prevent a decrease in the tensile strength of the reinforced fiber bundle 01. Therefore, in the winding device 100, by connecting the rotation resistance imparting means 53 to the F roller 54, the point to which the final conveying tension is imparted is the F roller 54 that is closest to the core material 03 on the yarn path 100a, and the F roller 54 and the core material 03 are arranged so that the span 54-03 between them is 10 mm or less.

[0029] 3 shows a winding device 101, which is an embodiment different from the winding device 100. In addition to the configuration of the winding device 100, the winding device 101 is provided with an F roller 54 and a rotational resistance imparting means 53 on a slide mechanism 55. The slide mechanism 55 is composed of a linear guide mechanism that can operate in one direction and a flat plate-shaped member for mounting members, and translates the F roller 54 and the rotational resistance imparting means 53 in a direction along an imaginary line connecting the axis of the F roller 54 and the axis of the core material 03. The F roller 54 and the core material 03 are preferably close to each other and are positioned such that they can be moved by the slide mechanism 55 until they come into contact. This allows for the creation of a yarn path 101a in which the F roller 54 and the core material 03 press against each other via the reinforcing fiber bundle 01 during operation of the winding device 101. In the yarn path 101a, the reinforcing fiber bundle 01 passes through the F roller 54 and simultaneously comes into contact with the core material 03, that is, is wound around the core material with the length of the span 54-03 becoming zero.

[0030] FIG. 4 shows a winding device 102, which is an embodiment different from the winding devices 100 and 101. In addition to the configuration of the winding device 101, the winding device 102 includes a contact force adjustment mechanism 56 connected to a slide mechanism 55. A rotatably supported sF roller 57 is also provided upstream of the F roller 54. The contact force adjustment mechanism 56 includes a pressure member 561, a block 562 supporting the pressure member 561, and a receiving member 563. The pressure member 561 supported by the block 562 applies a pushing / pulling force to the receiving member 563 attached to the slide mechanism 55 along a direction connecting the axis of the F roller 54 and the axis of the core material 03, thereby adjusting the force of the F roller 54 and the core material 03 pressing against each other via the reinforcing fiber bundle 01. This makes it possible to adjust the force with which the reinforced fiber bundle 01 wound around the core material 03 is pressed toward the axis of the core material 03, and by making the force of the pressing between the F roller 54 and the core material 03 very small while pressing them together via the reinforced fiber bundle 01, it is possible to suppress the generation of stress in the reinforced fiber bundle 01 in directions other than the longitudinal direction.

[0031] Here, as shown in FIG. 5 , when considering the positional relationship between the F roller 54, the core material 03, and the sF roller 57 located immediately upstream of the F roller 54 in the yarn path 102a of the winding device 102, when viewing the core material from the cross-sectional direction, an imaginary line segment A geometrically connecting the axis of the F roller 54 and the axis of the core material 03 is perpendicular to a line segment B on the yarn path 102a extending from the sF roller 57 to the F roller 54. Furthermore, the length of the region in the yarn path 102a where the reinforcing fiber bundle runs along the F roller 54 is within ½ of the circumferential length of the F roller 54 and within a range of 5% above and below the circumferential length. For example, if the circumferential length of the F roller 54 is 100 mm, ½ of the circumferential length is 50 mm, and 5% is 5 mm, so the length of the region is 45 to 55 mm. Furthermore, when viewing the core material in a direction perpendicular to the rotation axis, i.e., from the cross-sectional direction, the reinforcing fiber bundle crosses line segment A.

[0032] With this configuration, when the winding device 102 is operated with the reinforced fiber bundle 01 suspended based on the yarn path 102a, the direction of the force generated on the F roller 54 due to the tensile stress generated in the reinforced fiber bundle 01 (Y-axis direction in Figure 5) and the direction of the force generated on the F roller when the F roller 54 and the core material 03 press against each other via the running reinforced fiber bundle 01 (X-axis direction in Figure 5) are perpendicular to each other, and the two can be adjusted independently.

[0033] FIG. 6 shows a winding device 103, which is another embodiment different from the winding devices 100, 101, and 102. In addition to the configuration of the winding device 102, the winding device 103 includes a translation drive mechanism 63 that includes a support mechanism 61 and a rotation drive mechanism 62 for the winding unit 6, and an F roller 54 that is provided in a translation slide mechanism 59 and is provided in a slide mechanism 55. The translation drive mechanism 63 and the translation slide mechanism 59 are mechanically connected by a translation drive transmission mechanism 64 (not shown). More specifically, the translation drive mechanism 63 includes a translation motor 631, a linear motion mechanism 632, and a linear motion guide 633. The translation motor 631 is configured to be interlocked with a winding motor 621 (not shown) via a control unit (not shown). The translation motor 631 is rotatable (or can be driven to rotate spontaneously) in a direction parallel to the rotation axis of the core material 03, and rotates at the same speed as the winding motor 621. The rotation of the translational motor 631 is converted into linear motion parallel to the rotational axis direction of the core material 03 via the linear motion mechanism 632, and this is transmitted to the support mechanism 61 and the rotational drive mechanism 62 supported by the linear motion guide 633, so that the core material 03 rotates and also performs translational motion along its own rotational axis direction.

[0034] The translation motor 631 can reverse its rotation direction at a desired timing based on a command from the control unit. That is, the core material 03 can reverse its translation direction after translating at a desired timing and / or by a desired amount, thereby enabling reciprocating translational movement along its own rotational axis, or so-called "reciprocating traverse movement." The translation slide mechanism 59 supports the F roller 54 so that it can translate freely in the rotational axis direction of the core material 03. The translation slide mechanism 59 transmits a translational force generated by the translation drive mechanism 63 via the translation drive transmission mechanism 64, thereby synchronizing the F roller 54 with the reciprocating traverse movement of the core material 03 and enabling the reciprocating traverse to occur without generating a relative velocity in the axial direction of the core material.

[0035] With this configuration, even if the dimension of the core material 03 in the rotational axis direction is larger than the width dimension of the reinforcing fiber bundle 01, the position where the reinforcing fiber bundle 01 is wound around the core material 03 can be sequentially changed by translating the core material 03. Therefore, it is possible to wind the reinforcing fiber bundle 01 around a desired region of the core material 03 having any length in the rotational axis direction. Furthermore, by performing a reciprocating traverse motion of the F roller 54 in synchronization with the reciprocating traverse motion of the core material 03, the relative speed between the outer circumferential surface of the F roller 54 and the outer circumferential surface of the core material 03 in the rotational axis direction of the core material 03 can be suppressed in the region where the maximum tensile stress is generated in the reinforcing fiber bundle 01. Therefore, the reinforcing fiber bundle 01 can be wound around the core material 03 without generating tensile stress other than the longitudinal tensile stress in the reinforcing fiber bundle 01. A2. Preferred Specifications of Each Component of the Winding Device: Preferred aspects of each component of the winding devices 100, 101, 102, and 103 are described below. (1) Reinforced Fiber Bundle As described above, the reinforcing fiber bundle 01 is a fiber bundle containing reinforcing fibers that are approximately continuous along its longitudinal direction, and in addition to the reinforcing fibers, the reinforcing fiber bundle may contain a thermosetting and / or thermoplastic resin that is impregnated into or applied to the reinforcing fiber bundle. Furthermore, these resins may be liquid or solid in a room temperature environment, or may be a mixture of liquid and solid states.

[0036] The material of the reinforcing fibers is not particularly limited and can be freely selected and combined from carbon fiber, glass fiber, aramid fiber, metal fiber, natural fiber, etc. However, in consideration of the objective of the present disclosure of reinforcing the motor rotor, it is preferable to select a material with high tensile strength. Specifically, a material with a tensile strength of 2000 MPa or more is preferable. Typically, reinforcing fibers with a tensile strength of 6000 MPa or less are used. Preferred properties of the reinforcing fibers include the tensile modulus in the fiber direction and the elongation at break, with the tensile modulus measured according to the JIS R7606:2000B method preferably being 200 GPa or more, more preferably 280 GPa or more. While the preferred upper limit of the tensile modulus is not particularly limited, reinforcing fibers with a tensile modulus of 350 GPa or less are typically used. The elongation at break of the reinforcing fibers measured according to the JIS R7606:2000B method is preferably 1.5% or more, more preferably 2.0% or more. Although there is no particular limitation on the preferable upper limit of the elongation at break, reinforced fibers having an elongation at break of 2.5% or less are usually used. (2) Bobbin The bobbin 02 is an object in which the reinforced fiber bundle 01 is wound around a cylindrical member, and the wound reinforced fiber bundle 01 can be pulled out by applying a relative speed between the end of the reinforced fiber bundle 01 on the outer circumferential surface and the bobbin 02, or by applying a force to the end of the reinforced fiber bundle 01.

[0037] In this disclosure, the term "bobbin" refers to a bobbin on which the winding position of the reinforcing fiber bundle changes continuously and reciprocally with respect to the axial direction of the cylindrical member, i.e., a so-called "reel" on which the reinforcing fiber bundle is wound while the longitudinal position of the cylindrical member is fixed may be used instead of the bobbin 02. (3) Core Material The core material 03 is a cylindrical or approximately cylindrical object on which the reinforcing fiber bundle 01 is wound. Here, the cross-sectional shape perpendicular to the longitudinal direction does not necessarily need to be uniform, and the outer diameter of the area around which the reinforcing fiber bundle 01 is wound (hereinafter referred to as the "winding area") may be different from the outer diameter of the remaining area. For example, by making the outer diameter of the area located outside the winding area in the direction of the rotation axis larger than the outer diameter of the winding area, a defect known as "winding collapse," in which the reinforcing fiber bundle 01 pops out of the winding area after winding, can be prevented when the reinforcing fiber bundle 01 is wound while performing a reciprocating traverse motion. Furthermore, when the core material 03 is cylindrical, the shape of the cross section of its outer circumferential surface perpendicular to the rotation axis does not necessarily have to be a perfect circle. In the winding region, the ratio of the actual perimeter of the cross section to the circumscribed circle with the smallest diameter in the cross section perpendicular to the rotation axis is sufficient as long as it is in the range of 0.75 to 1.25, and preferably in the range of 0.9 to 1.1.

[0038] An example of a cross section perpendicular to the rotation axis of the core material 03 is a perfectly circular cross section 03A as shown in Fig. 7. On the other hand, examples of the cross section when the core material 03 is substantially cylindrical include a composite shape 03B formed by combining a flat surface portion and a curved surface portion, and a shape 03C in which grooves having intermittent recesses are formed in the circumferential direction.

[0039] The material of the core material 03 is not particularly limited as long as it can withstand the compressive force generated when the reinforcing fiber bundle 01 is tightly wound, and may be metal, ceramic, magnetic mineral, or a composite of these materials with adhesive or resin. (4) Free Rollers, Dancer Rollers, and Guide Rollers The free rollers 421, dancer rollers 422, and sF rollers 57 are rotatably supported and are used to define the running path of the reinforcing fiber bundle 01. Their configurations and materials are not particularly specified, and the material of the contact portion that comes into contact with the reinforcing fiber bundle 01 may be metal, ceramic, rubber, resin, or a composite product, but is preferably selected from high-strength materials so as not to cause plastic deformation or breakage due to the reaction force when supporting the conveying tension generated in the reinforcing fiber bundle 01. Furthermore, when the reinforcing fiber bundle 01 contains a liquid resin, it is more preferable that the reinforcing fiber bundle 01 has a surface property with excellent releasability or has been subjected to a surface treatment that gives it releasability, so that the liquid resin does not adhere to the yarn contact parts and contaminate the process.

[0040] The dancer roller 422 is supported by a guide mechanism (not shown) so that it can be raised and lowered, and can be adjusted to a desired weight by a weight (not shown), thereby specifying a desired value for the conveying tension applied to the reinforced fiber bundle 01. As an alternative to the weight, a pressure applied by an air cylinder or a hydraulic cylinder, or a retraction by magnetic force may be used.

[0041] Furthermore, the outer diameters of the yarn contact portions of these free rollers, dancer rollers, and guide rollers are preferably large in order to reduce the surface pressure during contact so as not to damage the reinforcing fiber bundle being conveyed. On the other hand, considering the case where the conveying speed of the reinforcing fiber bundle fluctuates, the larger the diameter of the yarn contact portion of the roller, the lower the responsiveness of the roller rotation speed to the conveying speed of the reinforcing fiber bundle. Therefore, it is preferable that the outer diameter of the yarn contact portion of the roller be limited to a constant value. In view of the above, the outer diameter of the yarn contact portion where these rollers come into contact with the reinforcing fiber bundle is preferably in the range of φ25 to 150 mm, and more preferably in the range of φ50 to 105 mm. (5) Unwinding Section The unwinding section 4 supports the bobbin 02 and unwinds the reinforcing fiber bundle 01 while applying a constant conveying tension to the reinforcing fiber bundle 01. The method of defining the conveying tension is not limited to the speed feedback control by adjusting the displacement of the dancer roller and the rotational speed of the unwinding motor described above, but may be a torque feedback control method in which a load cell type tension meter is provided in the yarn path to measure the conveying tension and provide feedback to the rotational torque of the unwinding motor, or a method in which the unwinding motor is replaced with a powder brake or a hysteresis brake and feedback control is performed on the braking force. (6) Yarn path constituent equipment unit The yarn path constituent equipment unit 5 defines the yarn path along which the reinforced fiber bundle 01 supplied from the unwinding unit 4 is conveyed, and feeds it to the winding unit 6. As long as the member closest to the core material 03 on the yarn path is the F roller 54 and the F roller 54 is connected to the rotational resistance imparting means 53, other components of the yarn path constituent equipment unit 5 are not particularly limited, and the members and arrangement may be freely selected in consideration of the material of the reinforced fiber bundle 01, the conveying tension to be imparted, etc. Here, the members that constitute the yarn guide configuration equipment section 5 may be any members that come into contact with the reinforced fiber bundle 01 to support or apply force to the reinforced fiber bundle 01 in order to configure the yarn guide, and include members that come into direct contact with the reinforced fiber bundle 01, such as rollers and fixed bars, as well as members that come into indirect contact with the reinforced fiber bundle 01 via a liquid or gas that is stored inside or passes through the inside. On the other hand, members that do not support the reinforced fiber bundle 01 directly or indirectly do not qualify as yarn guide configuration equipment members, and for example, a camera for measuring the position of the reinforced fiber bundle 01 or a sensor for measuring the temperature of the reinforced fiber bundle 01 do not qualify as yarn guide configuration equipment members.

[0042] For example, in order to apply a higher conveying tension, a means for applying tension upstream of the F roller 54 may be provided, or a plurality of tension-applying rollers 51 connected to the rotation resistance applying means 52 may be provided. In addition, a means for pressing a bar fixed to the reinforced fiber bundle 01 and applying tension by the friction thereof, or a means for running the reinforced fiber bundle through liquid resin stored in a liquid tank and applying tension by the viscous resistance when the reinforced fiber bundle passes through the liquid resin may be provided.

[0043] However, in terms of realizing higher conveyance tension, it is preferable for the yarn guide component parts to apply tension in a way that does not cause excessive loads other than tension to the reinforcing fiber bundle 01. In principle, the roller method, which can apply tension by its own rotational resistance without any relative speed with respect to the reinforcing fiber bundle 01, is more preferable than the bar method, which causes abrasion on the reinforcing fiber bundle, or the liquid tank method, which generates an out-of-plane force when the reinforcing fiber bundle travels through the liquid resin in the liquid tank and then leaves it.

[0044] Here, in the tensioning roller 51 equipped with the rotational resistance imparting means 52, the type of rotational resistance imparting means to the roller is not particularly limited. In addition to the rotational resistance imparting means 52 exemplified above, which uses torque resistance from an electric motor, the tensioning roller 51 may have a brake disc for connection to a mechanical brake mechanism, and the mechanical brake mechanism may generate rotational resistance by applying frictional resistance to the brake disc, or may use a powder brake or hysteresis brake. However, in consideration of the stability of the rotational resistance and durability during continuous operation, a torque resistance method using an electric motor, which can impart rotational resistance without contact, is preferred. (7) F Roller The F roller 54 is a roller connected to the rotational resistance imparting means 53 in order to maximize the tensile stress of the reinforcing fiber bundle 01 immediately before it is wound around the core material 03. The material of the F roller 54 is not particularly limited in its configuration or material, and can be freely selected and combined as long as it has the strength to withstand the load transmitted from the reinforcing fiber bundle 01 and the rotational resistance imparting means 53 and has a friction coefficient at the contact point that prevents slippage between the reinforcing fiber bundle 01 and the F roller 54. On the other hand, when the F roller 54 and the core material 03 press against each other sandwiching the reinforcing fiber bundle 01, the winding devices 101, 102, and 103 preferably use a soft surface material at the contact point of the F roller 54 to limit the load generated in the out-of-plane direction of the reinforcing fiber bundle 01. Considering the strength requirement described above, a composite structure in which a soft rubber layer is formed around the periphery of a hard material such as metal or ceramic is preferable. Furthermore, when an F roller 54 having such a structure is used and the reinforcing fiber bundle 01 contains a liquid resin component, it is preferable that a release coating be formed on the surface of the rubber layer to prevent the liquid resin component seeping out of the reinforcing fiber bundle 01 from adhering to and accumulating on the surface of the F roller 54. A3. Manufacturing method of fiber composite material: Figure 8 is a flowchart showing a manufacturing method of a fiber composite material. A fiber composite material is manufactured through each step of the flowchart shown in Figure 8. The manufactured fiber composite material includes fiber bundles and a resin impregnated into the fiber bundles. In this embodiment, the resin impregnated into the fiber bundles is a thermosetting resin.

[0045] In step S100, the reinforcing fiber bundle 01 is continuously drawn out from the bobbin 02 storing the reinforcing fiber bundle 01 while a constant tensile stress T0 is applied to the reinforcing fiber bundle 01 in the longitudinal direction of the fiber. In the process of step S100, any of the winding devices 100, 101, 102, and 103 of the present disclosure may be used (see FIGS. 1, 3, 4, and 6).

[0046] In step S200, the reinforced fiber bundle 01 passes through the yarn path constituent device section 5 and is conveyed to the F roller 54 in a state in which the tensile stress of the reinforced fiber bundle 01 is increased from T0 to Tf1.

[0047] In step S300, the reinforcing fiber bundle 01 passes through the F roller 54 and is conveyed to the core material 03 in a state in which the tensile stress applied to the reinforcing fiber bundle 01 is increased from Tf1 to Tf.

[0048] In step S300, the F roller 54 and the core material 03 press against each other via the reinforcing fiber bundle, and in the embodiment shown in Figure 5, the distance in the yarn path of the reinforcing fiber bundle 01 from passing through the F roller 54 to contacting the core material 03 is approximately 0 mm.

[0049] In step S400, the reinforcing fiber bundle 01 is wound around the core material 03 while being subjected to a tensile stress Tf.

[0050] The tensile stress in the fiber longitudinal direction of the reinforcing fiber bundle 01 at the time of completing each of steps S100 to S400 is T0 in step S100, Tf1 in step S200, and Tf in steps S300 and S400. As a specific example, when the winding device 102 is operated, T0 is 35 MPa, Tf1 is 1050 MPa, and Tf is 2300 MPa.

[0051] Here, the tensile stress in the fiber longitudinal direction of the reinforcing fiber bundle 01 is calculated by dividing the conveying tension applied to the reinforcing fiber bundle 01 by the sum of the cross-sectional areas of the reinforcing fibers contained therein. In other words, even when a material containing resin in addition to fibers is conveyed, the cross-sectional area of ​​the resin component is not used in calculating the tensile stress. Furthermore, even when the reinforcing fiber bundle 01 contains reinforcing fibers with the above-mentioned "yarn breakage defect" or "yarn slack defect," the tensile stress is calculated based on the assumption that all reinforcing fibers bear the stress equally.

[0052] Furthermore, for each of the above-mentioned tensile stresses, in order to unwind the reinforcing fiber bundle from the bobbin without defects, it is preferable that T0 be as small as possible so as not to apply a load to the bobbin, specifically, it is preferable to keep it at 100 MPa or less. On the other hand, the larger Tf is, the more effective the dense winding is, so it is preferable, specifically, it is preferable that it is 2000 MPa or more and 90% or less of the tensile strength of the reinforcing fiber bundle. Furthermore, Tf1 is determined from the tensile stress increased by the F roller and Tf, and is preferably kept at a low value to suppress yarn breakage during transport, preferably 1 / 10 to 1 / 2 of Tf, and more preferably 1 / 5 to 1 / 3 of Tf.

[0053] By performing the processes shown in the steps of the flowchart, the reinforcing fiber bundle 01 stored in the bobbin 02 can be tightly wound around the core material 03 without breaking during the process, while applying high tension to the reinforcing fiber bundle 01, i.e., while generating high tensile stress in the reinforcing fiber bundle 01. As a result, even when the core material 03 around which the reinforcing fiber bundle 01 is wound is hardened and molded, and then applied to the rotor of a motor, and the motor is rotated at high speed, it is possible to suppress the permanent magnet from falling off and the rotor from being damaged by centrifugal force, thereby obtaining a motor with excellent performance.

[0054] As will be readily understood by those skilled in the art, the present invention is not limited to these embodiments. For example, appropriately modifying and applying the components and configurations described in each embodiment, or appropriately substituting them with components and configurations that are publicly known or that a person skilled in the art can easily imagine from publicly known technology, should be understood as an aspect of the present invention. Furthermore, the upper and lower limits of the numerical ranges described above can be arbitrarily combined. Furthermore, a method for producing a fiber composite material using the winding device of the present invention should also be understood as an aspect of the present invention. A4. Another embodiment of the winding device: Figure 9 shows a winding device 104, which is an embodiment different from the winding devices 100, 101, 102, and 103. The winding device 104 has two end members 65 on the winding section 6. The end member 65 is a disk-shaped member having a notch in its outer periphery. The end member 65 is fixed to the support mechanism 651 so that the center of the disk coincides with the rotation axis of the core member 03 when viewed perpendicular to the rotation axis of the core member 03. The outer diameter of the disk is larger than the outer diameter of the core member 03 and protrudes outward. As shown in the schematic diagram of the core member 03 viewed from the rotation axis direction in FIG. 10 , the end member 65 does not overlap with the F roller 54 when viewed from the axial direction of the core member 03. In other words, the notch in the end member 65 does not protrude radially outward beyond the outer diameter of the core member 03, and the end member 65 does not interfere with the rotation of the F roller 54. The end member 65 does not include an interpolating member (not shown), which will be described later. Furthermore, the end members 65 are independent so as not to rotate in conjunction with the rotation of the core material 03, and are not fastened to any of the core material 03, the support member 61, or the rotation drive mechanism 62, but are fastened to another support mechanism 651 that constitutes the winding section 6 and fixed adjacent to both axial ends of the core material 03.

[0055] By providing the end member 65, when the reinforcing fiber bundle 01 is wound around the core material 03 using the winding device 104, the overlapping reinforcing fiber bundle 01 is tightened by its own tension, preventing it from collapsing and spreading in the direction of the rotation axis of the core material 03 (hereinafter referred to as "collapse of winding"). Therefore, it is possible to reliably maintain the applied tension and transport it to the next process. Furthermore, because the end member 65 is fixed so as not to be linked to the rotation of the core material 03, the position of the missing portion is fixed, and a state in which the end member 65 and the F roller 54 do not interfere with each other can be maintained at all times. Furthermore, because the end member 65 is fixed to the winding unit 6, when the winding unit 6 is translated in the direction of the rotation axis of the core material 03 relative to the F roller 54 by a translational movement mechanism not shown in FIG. 9, the end member 65 can also translate together with the core material 03 relative to the F roller 54.

[0056] Here, the two end members 65 do not necessarily need to be fixed to both ends in the axial direction of the core material 03, but may be fixed at overlapping positions on the outer peripheral surface of the core material 03. By adopting such an embodiment, the effect of preventing the above-mentioned collapse of the winding can be obtained not only when the reinforcing fiber bundle 01 is wound over the entire outer peripheral surface of the core material 03, that is, when the width of the outer peripheral surface of the core material 03 in the axial direction of the core material 03 is the same as the width of the winding region, but also when it is longer, that is, collapse of the winding can be prevented in a predetermined range of the winding region.

[0057] Furthermore, in the case where the winding device 104 has a translational drive mechanism 63 and sequentially changes the position at which the reinforcing fiber bundle 01 is wound on the core material 03 by a reciprocating traverse motion, the support mechanism 651 of the end member 65 can be configured to be fixed to a member moved by the translational drive mechanism 63. As a result, the end member 65 does not move in conjunction with the rotation of the core material, but moves in conjunction with the reciprocating traverse motion of the core material, and therefore can always hold down both ends of the winding area of ​​the core material and prevent collapse of the winding without being affected by positional fluctuations in the direction of the rotation axis of the core material.

[0058] Furthermore, the end member 65 may have a mechanism for fastening to the core material 03. This allows the position of the end member 65 to be maintained relative to the wound area of ​​the core material 03 when, after the winding process is completed, the end member 65 is fastened to the core material 03 and removed from the winding device 104. For example, when the reinforcing fiber bundle 01 is impregnated with a thermosetting resin, the end member 65 is transferred to the next process, such as a resin heat curing process. Therefore, when the wound reinforcing fiber bundle 01 is impregnated with resin, it is possible to prevent the reinforcing fiber bundle 01 from becoming unwound until the resin is bonded or fixed to the core material 03 with sufficient strength.

[0059] In the above-described embodiment, the fastening of the end member 65 to the core material 03 may be achieved by a structure in which the core material 03 has a threaded portion for fastening in advance and the end member 65 is fixed using this threaded portion, or by a structure in which the core material 03 is held between two end members 65 and the distance between the two end members 65 is fixed with a support or the like. There are no particular limitations on the structure as long as it fixes the relative positions of the core material 03 and each end member 65.

[0060] Furthermore, a complementary member (not shown) may be provided that fills in the missing portion of the end member 65, protrudes outward from the outer periphery of the core material 03 around the entire periphery of the core material 03, and is detachable from the core material 03 or the end member 65. The complementary member (not shown) can be attached to the core material after the winding process. The complementary member (not shown) complements the missing portion of the end member 65 that does not protrude outward from the outer diameter of the core material in the radial direction. Therefore, the end member 65 and the complementary member (not shown) protect the entire periphery of the wound area on the core material 03. Therefore, in a situation where the resin component contained in the reinforcing fiber bundle 01 wound around the core material 03 flows, such as when the resin component is heated in the next process, the reinforcing fiber bundle 01 can be prevented from becoming unwound from the missing portion of the end member 65.

[0061] A5. Another embodiment of the winding method for a reinforcing fiber bundle: Fig. 11 shows a schematic diagram of a winding device 105 that is different from any of the winding devices 100, 101, 102, 103, and 104, and Fig. 12 shows a top view of the winding section 6 and the F roller 54 in the winding device 105.

[0062] In the winding device 105, the winding section 6 has a translation motor 631, a linear motion mechanism 632, and a linear motion guide 633, and the core material 03 is capable of reciprocating traversing motion in the direction of its own rotation axis. The core material 03 has outer peripheral surfaces 03D at both ends of the winding region that are larger in diameter than the outer diameter of the winding region, and the outer peripheral surface of the F roller 54 that comes into contact with the reinforced fiber bundle 01 has a width that is 1.1 times the width of the reinforced fiber bundle 01. When the reinforced fiber bundle 01 is wound around the core material 03 using the winding device 105, the width of the reinforced fiber bundle 01 is smaller than the width of the winding region of the core material 03. In order to cover the winding region with the reinforced fiber bundle 01, the core material 03 rotates and performs a reciprocating traversing motion in the direction of its own rotation axis, thereby successively changing the position around which the reinforced fiber bundle 01 is wound. Here, the range of the reciprocating traverse motion required to cover the entire winding area with the reinforcing fiber bundle 01 is the width of the winding area minus the width of the reinforcing fiber bundle 01, whereas during winding, the F roller 54 and the core material 03 press against each other via the reinforcing fiber bundle 01, and the operating range of the above-mentioned reciprocating traverse motion is at most the width of the winding area minus the width of the F roller 54 in order to avoid interference between the F roller 54 and the large-diameter outer peripheral surface 03D of the core material. Therefore, at the end of the winding operation, it is not possible to cover the entire winding area of ​​the core material 03 with the reinforcing fiber bundle 01 by the difference between the width of the F roller 54 and the width of the reinforcing fiber bundle 01.

[0063] However, when a heat treatment is performed after the winding operation, the wound reinforcing fiber bundle 01 collapses, and the reinforcing fiber bundle 01 spreads in the direction of the rotation axis of the core material 03, so that the entire wound area can finally be covered with the reinforcing fiber bundle 01. At this time, it is important to minimize the amount of collapse in order to prevent the tension applied to the reinforcing fiber bundle 01 from decreasing due to the collapse.

[0064] Therefore, when using the winding device 105, it is most preferable that the width of the reinforcing fiber bundle 01 and the width of the F roller 54 are the same, simply from the viewpoint of covering the entire winding area with the reinforcing fiber bundle 01 without causing collapse of the winding. However, in an actual winding operation, taking into consideration the tolerance range of the width of the reinforcing fiber bundle 01 and the running position accuracy of the reinforcing fiber bundle 01, it is practically preferable that the width of the surface of the F roller 54 that comes into contact with the reinforcing fiber bundle be larger than the width of the reinforcing fiber bundle 01, and specifically, it is preferable that the width be 1.5 times or less the width of the reinforcing fiber bundle 01.

[0065] The width of the reinforcing fiber bundle 01 mentioned above is the average value of the values ​​obtained by measuring the length perpendicular to the fiber direction of the reinforcing fiber bundle 01 every 1 mm in the fiber direction of the reinforcing fiber bundle 01 as a whole to be used in the winding operation.

[0066] 01... Reinforced fiber bundle 02... Bobbin 03... Core material 03A, 03B, 03C... Cross-sectional shape perpendicular to the rotation axis of the core material 03D... Large diameter outer peripheral surface 4... Unwinding section 41... Bobbin holder 42... Tension control mechanism 421... Guide roller 422... Dancer roller 5... Yarn path configuration device section 51... Tension applying roller 52... Rotational resistance applying means 53... Rotational resistance applying means 54... F roller 55... Slide mechanism 56... Contact force adjusting mechanism 561... Pressurizing member 562... Block 563... Receiving member 57... sF roller 59... Translation slide mechanism 6... Winding section 61... Support mechanism 62... Rotation drive mechanism 621... Winding motor 622... Connection mechanism 63... Translation drive mechanism 631... Translation motor 632... Linear motion mechanism 633... Linear motion guide 64...Translation drive transmission mechanism Guide roller 72...Guide roller 100...Winding device 100a...Yarn path of winding device 100 101...Winding device 101a...Yarn path of winding device 101 102...Winding device 102a...Yarn path of winding device 102 103...Winding device 103a...Yarn path of winding device 103 104...Winding device 105...Winding device A...Imaginary line segment connecting the axis of F roller 54 and the axis of core material 03 B...Line segment on yarn path 102a heading from sF roller 57 to F roller 54 C...Span 71-72 D...Process progression direction E...Reciprocating traverse operation direction

Claims

1. A winding device for a reinforced fiber bundle, comprising: an unwinding section having a bobbin or reel that applies tensile stress to the reinforced fiber bundle wound on the bobbin or reel before supplying it; multiple components that form a path for transporting the reinforced fiber bundle; and a winding section that is equipped with a core material and a mechanism that supports the core material and rotates it around its axis to wind the reinforced fiber bundle around its outer periphery, wherein when the path is a yarn path and the multiple components are yarn path component parts, the component of the yarn path component part that is closest to the core material on the yarn path is a roller, and when the roller is an F roller, the F roller is connected to a rotation resistance applying means, and the distance from the F roller to the core material on the yarn path is 10 mm or less.

2. A reinforcing fiber bundle winding device as described in claim 1, wherein the F roller and the core material are close to each other and are configured to be movable into a position where they press against each other via the running reinforcing fiber bundle.

3. A reinforcing fiber bundle winding device as described in claim 2, which is provided with a contact force adjustment mechanism that adjusts the force of the F roller and the core material pressing against each other via the reinforcing fiber bundle.

4. A winding device as claimed in claim 2 or 3, wherein the yarn path component includes rollers other than the F roller, and the roller located immediately before the F roller on the path of the reinforced fiber bundle is designated as the sF roller, and when the core material is viewed from a direction perpendicular to its rotation axis, line segment A geometrically connecting the axis of the core material and the axis of the F roller is perpendicular to line segment B on the yarn path from the sF roller to the F roller, and further wherein the length of the area in the yarn path where the F roller contacts the reinforced fiber bundle is 1 / 2 the outer periphery of the F roller and within a range of 5% above or below that length.

5. A winding device according to claim 4, wherein the winding section has a mechanism for reciprocating the core material in the axial direction, and further, the F roller reciprocates in parallel with the reciprocating movement of the core material.

6. A method for winding a reinforced fiber bundle, in which a reinforced fiber bundle stored on a bobbin or reel is drawn out by applying tensile stress, and after being transported along a yarn path by multiple components constituting a route for transporting the reinforced fiber bundle, the bundle is wound around a core material, wherein when the route is the yarn path and the multiple components are yarn path component parts, the component of the yarn path component part that is closest to the core material on the yarn path is a roller, and when the roller is an F roller, rotational resistance is applied to the F roller to increase the tensile stress generated in the reinforced fiber bundle, and the distance from the F roller to the core material on the yarn path is 10 mm or less.

7. A method for winding a reinforcing fiber bundle as described in claim 6, wherein, when the core material is viewed from a direction perpendicular to its rotation axis, the reinforcing fiber bundle crosses a line segment A that geometrically connects the axial center of the core material and the axial center of the F roller, and the F roller and the core material press against each other via the running reinforcing fiber bundle.

8. A method for winding a reinforcing fiber bundle as described in claim 7, wherein the direction of the force generated on the F roller due to the tensile stress generated in the reinforcing fiber bundle is perpendicular to the direction of the force generated on the F roller when the F roller and the core material press against each other via the running reinforcing fiber bundle.

9. A method for winding a reinforcing fiber bundle according to claim 8, wherein the core material is rotated around its axis, and the core material and the F roller are reciprocated so as not to generate a relative speed in the direction of the rotation axis of the core material.

10. A winding device as claimed in claim 2 or 3, having end members on the outer circumferential surface of the core material or on both ends in the direction of the rotation axis, which protrude radially outward from the outer diameter of the core material and are supported independently so as not to be linked to the rotation of the core material, and the end members have a shape in which a part of the outer circumferential surface is missing, and the missing part does not protrude radially outward from the outer diameter of the core material, and does not overlap with the F roller when viewed in the axial direction of the core material.

11. A winding device as described in claim 10, wherein the winding section has a mechanism for reciprocating the core material along its rotational axis relative to the F roller, and the end member is supported so as to move in conjunction with the reciprocating movement of the core material along the rotational axis.

12. The winding device of claim 11, wherein the end members have mechanisms for fastening to the core material.

13. A winding device as claimed in claim 12, which has a complementary member that complements the missing portion of the end member and is detachable from the core material or the end member, and the complementary member protrudes radially outward from the outer diameter of the core material, complementing the missing portion of the end member that does not protrude radially outward from the outer diameter of the core material around the entire outer periphery of the core material.

14. A method for winding a reinforcing fiber bundle as set forth in claim 7 or 8, wherein end members are provided adjacent to each end of the area where the reinforcing fiber bundle is wound around the core material, protruding radially outward from the outer diameter of the core material and supported independently so as not to be linked to the rotation of the core material, and the outer surface of each end member is missing a portion, so that the missing portion does not protrude radially outward from the outer diameter of the core material and does not overlap with the F roller when viewed in the axial direction of the core material.

15. A method for winding a reinforcing fiber bundle according to claim 14, wherein the winding section is reciprocated in the direction of the rotation axis of the core material, and the end member is reciprocated in conjunction with the core material.

16. A method for reinforcing a core material, comprising fastening the end member according to claim 14 to the core material after carrying out the winding method for a reinforcing fiber bundle according to claim 15.

17. A method for reinforcing a core material as described in claim 16, in which, after carrying out the winding method for a reinforced fiber bundle as described in claim 15, a complementary member that complements the missing portion of the end member is attached to the core material or the end member, and the complementary member complements the missing portion of the end member that does not protrude radially outward from the outer diameter of the core material around the entire outer periphery of the core material.

18. A method for winding a reinforcing fiber bundle as set forth in claim 8, wherein the core material is rotated around its axis, and the core material and the F roller are reciprocated at a relative speed in the direction of the rotation axis of the core material, and an area on the outer periphery of the core material where the reinforcing fiber bundle is not wound is provided on both sides of the area where the reinforcing fiber bundle is wound, and the width of the surface of the F roller that comes into contact with the reinforcing fiber bundle is larger than the width of the reinforcing fiber bundle but is not more than 1.5 times the width of the reinforcing fiber bundle.

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