Method for manufacturing fiber bundle-containing product, and long fiber winding device

Abstract

In a long fiber winding device which spirally winds a product core shaft while continuously conveying the product core shaft, foreign matters are prevented from being mixed into the product. A long fiber winding device (1) is provided with a jig mandrel (MJ), a pair of conveyance units (2), and a plurality of spiral winding units (4). In the long fiber winding device (1), a jig conveying process, a yarn hanging process, a connecting process and a spiral winding process are executed. In the jig conveying step, the jig mandrel (MJ) is conveyed to the spiral winding unit (4). In the yarn hanging step, the front end parts of the plurality of fiber bundles (F) are fixed on the outer peripheral surface of the jig core shaft (MJ). In the connection step, a plurality of mandrels (M) (product mandrels) are sequentially connected to a jig mandrel (MJ) so as not to rotate relative to each other. In the spiral winding step, the plurality of connected mandrels (M) are sequentially conveyed to the downstream side in the conveying direction, and the plurality of mandrels (M) are sequentially spirally wound.

Description

Technical Field

[0001] The present invention relates to a method for producing a fiber bundle-containing product formed by winding a plurality of fiber bundles around a mandrel, and a long fiber winding device for winding a plurality of fiber bundles around a mandrel. Background Art

[0002] The long fiber winding device described in Patent Document 1 includes a helical winding unit for helically winding a fiber bundle around a core material (mandrel). The helical winding unit supplies the fiber bundle to the mandrel while rotating itself, thereby performing helical winding on the mandrel that moves without rotating.

[0003] Patent Document 2 discloses a technique of winding a plurality of fiber bundles around each of the plurality of mandrels while continuously feeding a plurality of mandrels connected in the axial direction of the mandrels in the forward direction (that is, downstream in a predetermined feeding direction).

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2020-82375

[0007] Patent Document 2: Japanese Patent Application Publication No. 2014-117913 Summary of the invention

[0008] In recent years, research has been conducted to improve the efficiency of spiral winding. For example, it is considered to arrange a plurality of spiral winding units similar to the spiral winding unit described in Patent Document 1 in the axial direction of the mandrel, and to continuously feed the connected plurality of mandrels toward the downstream side in the feeding direction as described in Patent Document 2. In this way, a large number of fiber bundles can be supplied to the mandrel at the same time.

[0009] Here, generally, when the fiber bundle is wound on the mandrel, the front end of the fiber bundle needs to be fixed to a certain position on the mandrel. If the fiber bundle is wound around the front end in a state where the front end of the fiber bundle is arranged near the circumference of the mandrel in order to fix the front end of the fiber bundle on the mandrel, problems such as uneven thickness of the fiber bundle layer or misalignment of the direction of the fiber bundle wound on the mandrel may occur. As a result, the quality of the product formed by the fiber bundle is reduced. In addition, in the case where the front end of the fiber bundle is fixed to the circumference of the mandrel by means other than the fiber bundle, foreign matter other than the fiber bundle is mixed into the product, which may cause the quality of the product to be reduced.

[0010] An object of the present invention is to prevent foreign matter from being mixed into a product in a long fiber winding device that performs helical winding on a product mandrel while continuously conveying the product mandrel.

[0011] The first scheme of the method for manufacturing a fiber bundle-containing product comprises manufacturing a plurality of fiber bundle-containing products including the plurality of fiber bundles in a long fiber winding device for winding a plurality of fiber bundles on respective plurality of core shafts, and is characterized in that the long fiber winding device comprises: a jig core shaft, the jig core shaft being shorter than the plurality of product core shafts in a prescribed core shaft axial direction; a conveying unit, the conveying unit being configured to be able to convey the jig core shaft and the plurality of product core shafts arranged and connected in the core shaft axial direction in sequence from the upstream side to the downstream side in a prescribed conveying direction along the core shaft axial direction; and a plurality of spiral winding units, the plurality of spiral winding units being arranged in the core shaft axial direction, each configured to be able to spirally wind the plurality of fiber bundles on the jig core shaft and the plurality of product core shafts, The invention comprises: a jig conveying step, in which the jig core shaft is installed on the conveying unit and conveyed to a specified spiral winding unit among the plurality of spiral winding units; a yarn hanging step, in which, after the jig conveying step, the front end portions of the plurality of fiber bundles supplied from the specified spiral winding unit are fixed to the jig core shaft; a connecting step, in which, after the jig conveying step, the plurality of product core shafts are arranged in the axial direction of the core shaft at a position closer to the upstream side in the conveying direction than the jig core shaft and connected in sequence so as to be unable to rotate relative to each other; and a spiral winding step, in which, after the yarn hanging step, the plurality of product core shafts connected in the connecting step are sequentially conveyed to the downstream side in the conveying direction, while the plurality of product core shafts are sequentially spirally wound by the plurality of spiral winding units.

[0012] In this embodiment, after the front end of each of the plurality of fiber bundles is fixed to the jig mandrel, the plurality of product mandrels are sequentially connected so as not to rotate relative to each other at a position upstream of the jig mandrel in the conveying direction and sequentially conveyed to the downstream side in the conveying direction. The product mandrels sequentially conveyed in this manner are sequentially spirally wound. Thus, it is possible to prevent the front end of the fiber bundle from being mixed into the product formed by winding the plurality of fiber bundles on the plurality of product mandrels, and to sequentially wind the plurality of fiber bundles on each of the plurality of product mandrels. Therefore, in a long fiber winding device that spirally winds the product mandrel while continuously conveying it, it is possible to prevent foreign matter from being mixed into the product.

[0013] The manufacturing method of the fiber bundle-containing product of the second scheme is characterized in that, in the first scheme, the spiral winding step includes: a first spiral winding step of winding the plurality of fiber bundles around the plurality of product core shafts at a predetermined first winding angle; and a second spiral winding step of winding the plurality of fiber bundles around the plurality of product core shafts at a second winding angle different from the first winding angle, and the manufacturing method of the fiber bundle-containing product includes: a winding angle changing jig conveying step of connecting the jig core shaft to the plurality of product core shafts in a manner that the jig core shaft is non-rotatable relative to the plurality of product core shafts. The steps of: step 110 of winding an upper portion of the first core shaft on which the plurality of fiber bundles are wound at the end of the first spiral winding step, and conveying the jig core shaft to the downstream side in the conveying direction; a winding angle changing and fixing step, after the winding angle changing jig conveying step, fixing the midway portion of each of the plurality of fiber bundles to the jig core shaft; and a winding angle changing and connecting step, connecting the second core shaft among the plurality of product core shafts on which the plurality of fiber bundles are wound at the beginning of the second spiral winding step to the jig core shaft in a non-rotatable manner relative to each other.

[0014] In this embodiment, when the winding angle is changed, the middle portions of the plurality of fiber bundles are fixed to the jig mandrel. Therefore, it is possible to avoid the middle portions of the fiber bundles bent due to the change of the winding angle from being mixed into the product.

[0015] The manufacturing method of the fiber bundle product of the third scheme is characterized in that, in the first or second scheme, the conveying direction has a horizontal component, and the long fiber winding device has a core shaft support portion, which supports the middle portion of the core shaft axial direction of the multiple product core shafts connected in the axial direction of the core shaft, and each time the first unit conveying process is performed more than once, the angle of the axis of the multiple product core shafts in the next unit conveying process is changed to a specified angle other than a multiple of 360 degrees, wherein the unit conveying process refers to conveying the core shaft group including the multiple product core shafts from the upstream end to the downstream end in the conveying direction once.

[0016] In the case where the conveying direction has a horizontal component, there is a possibility that a plurality of product mandrels connected along the axial direction of the mandrel may bend downward due to gravity. In the present embodiment, the middle portion of the connected product mandrel is supported by the mandrel support portion, thereby suppressing such deflection. However, in such a structure, the fiber bundle, which is usually softer than the product mandrel, is pressed from below by the mandrel support portion, so the fiber bundle wound on the product mandrel is easily deformed. Therefore, there is a concern that the shape of the product may be deformed. In the present embodiment, the angle of the winding of the product mandrel is changed each time the first unit conveying process is performed. Thus, each time the first unit conveying process is performed, the position of the fiber bundle-containing product pressed from below by the mandrel support portion can be changed in the circumferential direction of the product mandrel. That is, it is possible to suppress the fiber bundles stacked at the same position in the circumferential direction of the product mandrel from being repeatedly pressed from below by the mandrel support portion. Therefore, it is possible to suppress the uneven degree of deformation of the fiber bundle in the circumferential direction of the product mandrel. Therefore, it is possible to suppress the deformation of the shape of the product.

[0017] The manufacturing method of the fiber bundle-containing product of the fourth scheme is characterized in that, in any one of the first to third schemes, in the jig conveying step, a specified first jig core shaft is used as the jig core shaft, and after the jig conveying step, after the unit conveying step is performed a specified second time or more, a second jig core shaft thicker than the first jig core shaft is installed on the conveying unit, wherein the unit conveying step refers to conveying the core shaft group including the plurality of product core shafts once from the upstream end to the downstream end in the conveying direction.

[0018] The fiber bundle-containing product becomes thicker as the fiber bundle is wound around the product mandrel. When the fiber bundle is further wound around the thickened fiber bundle-containing product, if the thin first jig mandrel is still used when using the jig mandrel, the following problem may occur. That is, when the diameter of the first jig mandrel is greatly different from the diameter of the fiber bundle-containing product, even if the winding angle of the fiber bundle around the first jig mandrel is in accordance with the target angle, there is a possibility that the winding angle of the fiber bundle around the fiber bundle-containing product deviates from the target angle. In this way, there is a concern that the adjustment of the winding angle of the fiber bundle around the first jig mandrel will not be normally reflected in the winding angle of the fiber bundle around the fiber bundle-containing product. In this scheme, by installing a second jig mandrel thicker than the first jig mandrel on the conveying unit under specified conditions, it is possible to easily make the winding angle of the fiber bundle around the second jig mandrel roughly consistent with the winding angle of the fiber bundle around the thickened fiber bundle product. Therefore, the winding angle of the fiber bundle around the fiber bundle-containing product can be made as close to the target angle as possible.

[0019] The long fiber winding device of the fifth scheme winds multiple fiber bundles on each of multiple core shafts, and is characterized in that it comprises: a jig core shaft, which is shorter than the multiple product core shafts in a specified core shaft axial direction; a conveying unit, which is configured to be able to convey the jig core shaft and the multiple product core shafts arranged and connected in the core shaft axial direction from the upstream side to the downstream side in a specified conveying direction along the core shaft axial direction in sequence; and multiple spiral winding units, which are arranged in the core shaft axial direction and each is configured to be able to spirally wind the multiple fiber bundles on the jig core shaft and the multiple product core shafts.

[0020] In this aspect, similarly to the first aspect, in the filament winding device that spirally winds the product mandrel while continuously conveying the product mandrel, it is possible to prevent foreign matter from being mixed into the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a perspective view of the filament winding device according to the present embodiment.

[0022] Figure 2 middle, Figure 2 (a) is a side view of the long fiber winding device, Figure 2 (b) is a side view of the mandrel.

[0023] Figure 3 This is a block diagram showing the electrical structure of the filament winding device.

[0024] Figure 4 middle, Figure 4 (a) is the front view of the spirally wound unit, Figure 4 (b) is an enlarged view of a supply cylinder and its surrounding structures.

[0025] Figure 5 middle, Figure 5 (a) is the rear view of the spirally wound unit. Figure 5 (b) is a side view of the spirally wound unit.

[0026] Figure 6 (a) and (b) are side views of the jig mandrel.

[0027] Figure 7 (a) and (b) are views of the connection portion viewed from the axial direction of the core shaft.

[0028] Figure 8 (a) to (c) are explanatory diagrams showing the installation, removal or movement of the jig core shaft, etc.

[0029] Fig. 9 (a) to (c) are explanatory diagrams showing the installation, removal or movement of the jig core shaft, etc.

[0030] Fig.10 (a) to (c) are explanatory diagrams showing the installation, removal or movement of the jig core shaft, etc.

[0031] Fig.11 (a) to (c) are explanatory diagrams showing the installation, removal or movement of the jig core shaft, etc.

[0032] Fig.12 (a) to (c) are explanatory diagrams showing the yarn being hung on the jig mandrel.

[0033] Fig.13 This is a flowchart showing the procedure of winding a plurality of fiber bundles around a plurality of mandrels.

[0034] Fig.14 (a) and (b) are explanatory diagrams showing changes in the winding angle of the fiber bundle.

[0035] Fig.15 middle, Fig.15 (a) is an explanatory diagram showing the change of the angle of the mandrel around the center of the mandrel axis, Fig.15 (b) is a graph for explaining the change in the angle. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described. Figure 1 The directions shown are defined as the front-to-back direction, the left-to-right direction, and the up-to-down direction. The front-to-back direction and the left-to-right direction are parallel to the horizontal direction. The front-to-back direction and the left-to-right direction are orthogonal to each other. The up-to-down direction is a direction orthogonal to the horizontal direction and is the direction in which gravity acts (vertical direction). The front-to-back direction is also referred to as the conveying direction (described later). The front side is also referred to as the upstream side in the conveying direction. The rear side is also referred to as the downstream side in the conveying direction.

[0037] (Long fiber winding device)

[0038] Reference Figure 1 to Figure 3 The schematic structure of the filament winding device 1 according to the present embodiment will be described. Figure 1 It is a perspective view of the filament winding device 1 . Figure 2 (a) is a side view of the filament winding device 1. Figure 2 (b) is a side view of a core material (core axis M) around which a plurality of fiber bundles are wound. Figure 3 It is a block diagram showing the electrical structure of the filament winding device 1.

[0039] The long fiber winding device 1 is configured to have a plurality of mandrels M (mandrels for products of the present invention. Figure 2 A plurality of fiber bundles are wound around each of (a) and (b). Figure 1 to Figure 3Illustration is omitted. "Winding a fiber bundle on the core shaft M" includes both winding a fiber bundle on the outer peripheral surface of the core shaft M and further winding a fiber bundle on the fiber bundle wound on the outer peripheral surface of the core shaft M. Each of the multiple fiber bundles is formed by impregnating a thermosetting or thermoplastic synthetic resin material in a fiber material such as carbon fiber. The core shaft M is a core material such as a cylindrical or rod-shaped material that extends long in a predetermined core shaft axial direction. The core shaft M is formed of a high-strength material such as metal. After winding the multiple fiber bundles on the core shaft M, a heat curing process such as baking or a cooling process is performed to solidify the resin impregnated in the multiple fiber bundles. The fiber bundle-containing product is completed by pulling out the core shaft M from the fiber bundle-containing body containing the multiple fiber bundles and the cured resin. Alternatively, a product in which the fiber bundle-containing body and the core shaft M are integrated is treated as a completed fiber bundle-containing product.

[0040] like Figure 1 to Figure 3 As shown, the long fiber winding device 1 includes a pair of conveying units 2 (the conveying units of the present invention), a hoop winding unit 3, a plurality of (five in the example of the present embodiment) spiral winding units 4, and a control device 5. As described later, the long fiber winding device 1 is configured to move a plurality of mandrels M arranged and connected in the front-to-back direction from the front side to the rear side (from the upstream side to the downstream side in the conveying direction) by the pair of conveying units 2. In addition, the long fiber winding device 1 is configured to wind a plurality of fiber bundles supplied from the hoop winding unit 3 and the plurality of spiral winding units 4 around each of the plurality of mandrels M moved by the pair of conveying units 2.

[0041] Before describing each component of the filament winding device 1 in more detail, Figure 2 (b) will explain the more specific structure of the mandrel M. The mandrel M is axially oriented in a predetermined direction ( Figure 2 The core shaft M is long in the left-right direction of the paper (b). In the following, the core shaft M is assumed to be roughly cylindrical or columnar to advance the description. In other words, it is assumed that the cross section of the core shaft M that is orthogonal to the core shaft axis is roughly circular. The center of the cross section is called the core shaft axis center. The radial direction of the core shaft M is called the core shaft radial direction. Figure 2 The left side of the paper in (b) is set as one side in the axial direction of the core shaft. Figure 2 The right side of the paper of (b) is set as the other side in the axial direction of the core shaft. The core shaft M has, for example, a small diameter portion Ma, a large diameter portion Mb and a small diameter portion Mc. In the axial direction of the core shaft, the small diameter portion Ma, the large diameter portion Mb and the small diameter portion Mc are arranged in this order. In addition, the shape of the core shaft M is not limited to a cylindrical or columnar shape. For example, the cross-section of the core shaft M that is orthogonal to the axial direction of the core shaft may also be polygonal. In this case, the center of gravity of the cross-section may be referred to as the core shaft axis center. Alternatively, any other arbitrary point on the cross-section may be referred to as the core shaft axis center.

[0042] The small diameter portion Ma is a portion formed at one end portion of the mandrel M in the axial direction of the mandrel. The small diameter portion Ma is, for example, roughly cylindrical or roughly cylindrical. The small diameter portion Ma has, for example, an inclined portion Ma1 in a roughly truncated cone shape and a cylindrical portion Ma2 in a roughly cylindrical shape. The inclined portion Ma1 is a portion adjacent to the large diameter portion Mb in the axial direction of the mandrel. The farther the inclined portion Ma1 is from the large diameter portion Mb in the axial direction of the mandrel, the smaller the diameter. The cylindrical portion Ma2 is arranged on the opposite side of the large diameter portion Mb across the inclined portion Ma1 in the axial direction of the mandrel. The cylindrical portion Ma2 has, for example, a clamping portion Md and a connecting portion Me. The clamping portion Md is a portion of the cylindrical portion Ma2 that is recessed inward in the radial direction of the mandrel. The clamping portion Md is configured to be held by a clamping mechanism 25A described later. The connecting portion Me is configured to be connected to the small diameter portion Mc of another mandrel M. The connecting portion Me has, for example, a recessed portion Me1 configured to allow a convex portion Mg1 described later to be inserted, and a plurality of positioning holes Me2 configured to allow a plurality of positioning pins Mg2 described later to be respectively inserted.

[0043] The large diameter portion Mb is arranged on the other side compared with the small diameter portion Ma and on one side compared with the small diameter portion Mc in the axial direction of the core shaft. In other words, the large diameter portion Mb is arranged between the small diameter portion Ma and the small diameter portion Mc in the axial direction of the core shaft. The large diameter portion Mb is, for example, roughly cylindrical or roughly cylindrical. The shape of the large diameter portion Mb is not limited to this. The outer diameter of the large diameter portion Mb is larger than the outer diameter of the cylindrical portion Ma2 and the outer diameter of the cylindrical portion Mc2. The large diameter portion Mb extends over most of the core shaft M in the axial direction of the core shaft. The large diameter portion Mb, for example, has a central portion Mb2 and a pair of end portions Mb1. The pair of end portions Mb1 are arranged at both ends of the large diameter portion Mb in the axial direction of the core shaft. The central portion Mb2 is arranged between the pair of end portions Mb1 in the axial direction of the core shaft. The central portion Mb2 occupies most of the large diameter portion Mb in the axial direction of the core shaft. The fiber bundle-containing body including the fiber bundle wound around the central portion Mb2 among the fiber bundles wound around the large diameter portion Mb is handled as a product (fiber bundle-containing product).

[0044] The small diameter portion Mc is a portion formed at the other end of the mandrel M in the axial direction of the mandrel. The small diameter portion Mc is, for example, roughly cylindrical or roughly cylindrical. The small diameter portion Mc has, for example, a roughly truncated cone-shaped inclined portion Mc1 and a roughly cylindrical cylindrical portion Mc2. The inclined portion Mc1 is a portion adjacent to the large diameter portion Mb in the axial direction of the mandrel. The farther the inclined portion Mc1 is from the large diameter portion Mb in the axial direction of the mandrel, the smaller its diameter. The cylindrical portion Mc2 is arranged on the opposite side of the large diameter portion Mb across the inclined portion Mc1 in the axial direction of the mandrel. The outer diameter of the cylindrical portion Mc2 is roughly equal to the outer diameter of the cylindrical portion Ma2. The cylindrical portion Mc2 has a clamping portion Mf and a connecting portion Mg. The connecting portion Mg is configured to be connected to the small diameter portion Ma of another mandrel M. The connecting portion Mg includes, for example, a convex portion Mg1 protruding toward one side in the axial direction of the core shaft (the opposite side of the large diameter portion Mb), and a plurality of positioning pins Mg2 protruding toward one side in the axial direction of the core shaft. The convex portion Mg1 can be inserted into the concave portion Me1 of the other core shaft M. Each of the plurality of positioning pins Mg2 can be inserted into any one of the plurality of positioning holes Me2.

[0045] The plurality of mandrels M having the above structure can be arranged in the mandrel axial direction and connected in a manner that they cannot rotate relative to each other (i.e., cannot rotate relative to each other). That is, the two mandrels M are connected in a manner that they cannot rotate relative to each other by means of the connecting portion Me of one mandrel M and the connecting portion Mg of another mandrel M. In this way, the two or more mandrels M can be configured to be connected in the mandrel axial direction and extend long along the mandrel axial direction.

[0046] The structure of the pair of conveying units 2 is described based on the above-mentioned structure of the core shaft M. The pair of conveying units 2 is configured to install one or more core shafts M in a non-rotatable manner. The pair of conveying units 2 is configured to enable one or more core shafts M to move from the front side (upstream side in the conveying direction) to the rear side (downstream side in the conveying direction). The conveying direction is roughly parallel to the core shaft axis of the one or more core shafts M moved by the pair of conveying units 2.

[0047] like Figure 1 to Figure 3 As shown, the pair of conveying units 2 includes an upstream conveying unit 2A and a downstream conveying unit 2B. The upstream conveying unit 2A is arranged at the frontmost side of the long fiber winding device 1. The downstream conveying unit 2B is arranged at the rearmost side of the long fiber winding device 1. In other words, the pair of conveying units 2 is arranged to sandwich the hoop winding unit 3 and the spiral winding unit 4 in the front-to-back direction (i.e., the conveying direction).

[0048] like Figure 1 and Figure 2As shown in (a), the upstream conveying unit 2A has a base portion 21A and a movable portion 22A. The base portion 21A is set on the floor surface 20 of a building (not shown) in a non-movable manner. The base portion 21A has a frame 23A, a rail 24A and a clamping mechanism 25A. The frame 23A extends long in the front-to-back direction. The rail 24A is configured to guide the movable portion 22A in the front-to-back direction. The rail 24A is arranged on the upper surface of the frame 23A and extends long in the front-to-back direction. The clamping mechanism 25A is arranged at the rear end portion of the frame 23A. The clamping mechanism 25A is configured, for example, to hold a clamping portion Md of one of the multiple spindles M, thereby holding the spindle M in a non-movable and non-rotatable manner in the axial direction of the spindle. The clamping mechanism 25A has, for example, a cylinder 26A driven by the supply and discharge of compressed air (see Figure 3 ), and an upstream holding member (not shown) driven by the air cylinder 26A. The supply and discharge of compressed air relative to the air cylinder 26A are controlled by, for example, the control device 5 opening and closing an electromagnetic valve (not shown) arranged on the flow path of the compressed air. The upstream holding member is configured to be movable between a holding position for holding the clamping portion Md and a release position for releasing the grip of the clamping portion Md by the air cylinder 26A. In addition, the upstream holding member may be driven by a motor (not shown) or the like instead of the air cylinder 26A.

[0049] The movable portion 22A is configured to be movable in the front-to-back direction relative to the base portion 21A. The movable portion 22A has a main body 27A and a transverse motor 28A. The main body 27A is configured to be connected to a core shaft M among a plurality of core shafts M via a connecting portion Me of the core shaft M, and to support the core shaft M in a non-rotatable manner. The main body 27A is configured to be guided in the front-to-back direction by a rail 24A. The main body 27A is driven to move in the front-to-back direction by the transverse motor 28A. The transverse motor 28A is electrically connected to the control device 5 and is controlled by the control device 5. The transverse motor 28A is configured to be able to drive the main body 27A to move in either direction, the front or the back.

[0050] like Figure 1 and Figure 2 As shown in (a), the downstream conveying unit 2B has a base portion 21B and a moving portion 22B. The downstream conveying unit 2B is constructed to be roughly plane-symmetrical with the upstream conveying unit 2A, with a predetermined imaginary plane (not shown) perpendicular to the front-to-back direction as a symmetry plane. That is, the base portion 21B has a frame 23B, a rail 24B and a clamping mechanism 25B. The rail 24B extends long in the front-to-back direction. The clamping mechanism 25B is arranged at the front end portion of the frame 23B. The clamping mechanism 25B is constructed, for example, to hold a clamping portion Mf of one of the multiple mandrels M, thereby holding the mandrel M in a manner that is unable to move in the axial direction of the mandrel and unable to rotate. The clamping mechanism 25B has, for example, a cylinder 26B (refer to Figure 3 ) and a downstream holding member (not shown) driven by the cylinder 26B. The supply and discharge of compressed air relative to the cylinder 26B are controlled by the control device 5 in the same manner as the supply and discharge of compressed air relative to the cylinder 26A. The downstream holding member is configured to be able to move between a holding position for holding the clamping portion Mf and a release position for releasing the grip of the clamping portion Mf by the cylinder 26B. In addition, the downstream holding member can also be driven by a motor (not shown) instead of the cylinder 26B. The moving portion 22B has a main body 27B and a lateral movement motor 28B. The main body 27B is configured to be connected to a core shaft M among multiple core shafts M via a connecting portion Mg of the core shaft M, and the core shaft M is supported in a non-rotatable manner. The main body 27B is configured to be guided in the front-to-back direction by the rail 24B. The main body 27B is moved and driven in the front-to-back direction by the lateral movement motor 28B. The lateral movement motor 28B is electrically connected to the control device 5 and controlled by the control device 5. The traverse motor 28B is configured to be able to drive and move the main body 27B in either the forward or rearward direction.

[0051] The hoop winding unit 3 is configured to be able to perform hoop winding on the core shaft M. Hoop winding refers to a winding method of winding the fiber bundle in a direction substantially perpendicular to the axial direction of the core shaft. Figure 1 As shown, the hoop winding unit 3 is arranged, for example, on the upstream side immediately before the downstream conveying unit 2B in the axial direction of the core shaft. The hoop winding unit 3 has a main body 31, a rotating component 32 and a plurality of supply cylinders 33. The main body 31 is fixed in position relative to the floor surface 20. The main body 31 is configured to support the rotating component 32 in a manner that allows it to rotate around the axial center of the core shaft M. The rotating component 32 is, for example, a roughly disc-shaped component. A roughly circular through hole 34 through which the core shaft M can pass is formed in the central portion of the rotating component 32. The rotating component 32 rotatably supports a plurality of supply cylinders 33 arranged outside the through hole in the radial direction of the core shaft. A fiber bundle (not shown) is wound on each supply cylinder 33.

[0052] The hoop winding unit 3 includes a rotary motor 35 (see Figure 3 ). The rotating motor 35 is electrically connected to the control device 5 and is controlled by the control device 5. When performing hoop winding, the control device 5 controls the conveying unit 2 to move the core shaft M to the downstream side in the conveying direction, while controlling the rotating motor 35 to rotate the rotating member 32. As a result, the fiber bundles are drawn out from each supply cylinder 33 rotating around the core shaft M, and a plurality of fiber bundles are hoop wound on the core shaft M.

[0053] Each of the plurality of spiral winding units 4 is configured to be capable of performing spiral winding on the core shaft M. Spiral winding refers to a winding method of winding a fiber bundle in a direction having a component in the axial direction of the core shaft, compared to hoop winding. In the present embodiment, a winding method in which the fiber bundle is inclined at 45 degrees or less relative to the axial direction of the core shaft is referred to as spiral winding. For example, the plurality of spiral winding units 4 are arranged between the upstream conveying unit 2A and the hoop winding unit 3 in the conveying direction. The plurality of spiral winding units 4 are arranged in an array in the front-to-back direction.

[0054] Reference Figure 4 (a)~ Figure 5 (b) describes a more specific structure of each spirally wound unit 4. Figure 4 (a) is a front view of the spirally wound unit 4. Figure 4 (b) is an enlarged view of a supply cylinder and its surrounding structures. Figure 5 (a) is a rear view of the spirally wound unit 4. Figure 5 (b) is a side view of the spirally wound unit 4.

[0055] like Figure 4 (a) Figure 5 (a) and Figure 5 As shown in (b), each spiral winding unit 4 has a base 41, a disk member 42, a plurality of supply cylinders 43, a plurality of fiber bundle guides 44, and a core shaft support 45. The base 41 is opposite to the floor surface 20 (see Figure 2 (a)) and fixed in position. The base portion 41 is configured to support the disk member 42 in a manner that allows it to rotate around the axis center of the core shaft M. The disk member 42 is a generally disk-shaped member configured to be rotatable relative to the base portion 41. The rotation axis direction of the disk member 42 is generally parallel to the front-to-back direction (that is, generally parallel to the axis direction of the core shaft). In the radial direction of the core shaft, a generally circular through hole 46 (see Figure 1 and Figure 4 (a)). The disk member 42 is configured to support a plurality of supply cylinders 43 and a plurality of fiber bundle guides 44 arranged outside the through hole 46 in the radial direction of the core shaft. The disk member 42 is rotated by a disk motor 47 (see Figure 3 and Figure 5 (b)) and a power transmission mechanism (not shown) are used to rotate the disk around the center of the core shaft M. The disk rotating motor 47 is provided in each spiral winding unit 4. The disk rotating motor 47 is electrically connected to the control device 5 (see Figure 3 ), controlled by the control device 5.

[0056] The plurality of supply cylinders 43 are arranged in a row in the circumferential direction of the mandrel M (hereinafter referred to as the mandrel circumferential direction). The fiber bundle F (see Figure 4(a), (b)). Each of the plurality of supply cylinders 43 is supported rotatably (autorotatably) by, for example, a plate-shaped support member 48 (see Figure 4 (b) Figure 5 (b)). The support member 48 is fixed to the disk member 42. That is, the plurality of supply cylinders 43 are supported on the disk member 42 via the plurality of support members 48. In addition, instead of the disk member 42 and the plurality of support members 48, a support member (not shown) that supports the plurality of supply cylinders 43 in a rotatable manner may be provided.

[0057] A plurality of fiber bundle guides 44 are provided respectively corresponding to the plurality of supply cylinders 43. The plurality of fiber bundle guides 44 are each mounted on the disk member 42. The plurality of fiber bundle guides 44 are arranged on the inner side of the core shaft radial direction of the plurality of supply cylinders 43. The plurality of fiber bundle guides 44 are arranged in an array in the core shaft circumferential direction. The plurality of fiber bundle guides 44 are each arranged to extend in a predetermined direction parallel to the core shaft radial direction. The plurality of fiber bundle guides 44 are each configured to guide the fiber bundle F unwound from the supply cylinder 43 to the inner side in the core shaft radial direction. The plurality of fiber bundle guides 44 are each configured to, for example, be driven by a guide rotating motor 49 (see Figure 3 and Figure 5 (b)), the extending direction of each fiber bundle guide 44 is used as the rotation axis and is driven to rotate. The guide rotation motor 49 is provided in each spiral winding unit 4. The guide rotation motor 49 is electrically connected to the control device 5 (refer to Figure 3 ), controlled by the control device 5.

[0058] In addition, if Figure 4 As shown in (a), in the radial direction of the core shaft, a plurality of tension applying parts 50 are provided between the plurality of supply cylinders 43 and the plurality of fiber bundle guides 44. The plurality of tension applying parts 50 are configured to apply tension to the plurality of fiber bundles F (see Figure 4 (a), (b)) apply tension respectively. The plurality of tension applying parts 50 are respectively provided corresponding to the plurality of supply cylinders 43 and the plurality of fiber bundle guides 44. The plurality of tension applying parts 50 each have, for example, a first guide roller 51, a slack eliminating roller 52 and a second guide roller 53 (see Figure 4 (b)). The fiber bundle F drawn out from each supply cylinder 43 is wound on the first guide roller 51, the slack eliminating roller 52 and the second guide roller 53 provided in the corresponding tension applying portion 50 in this order. Furthermore, the fiber bundle F is guided inward in the radial direction of the core shaft by the corresponding fiber bundle guide 44.

[0059] The spindle support portion 45 is configured to support the spindle M that is moved by the pair of conveying units 2. The spindle support portion 45 is disposed, for example, on the rear side of the disk member 42 (see Figure 2(a) and Figure 5 (b)). Figure 5 As shown in (b), the spindle support portion 45 includes, for example, a support member 54 and a plurality of support rollers 55 to 58. The support member 54 is mounted on the base portion 41 so as to be movable up and down. The support member 54 is moved by a support portion up and down motor 54M (see Figure 3 and Figure 6 (a)) and a power transmission mechanism (not shown) are used to move and drive in the up and down directions. A plurality of support rollers 55 to 58 are supported on the support member 54 in a manner that allows them to rotate and move in the radial direction of the core shaft. The support rollers 55 and 56 are arranged on the lower side of the passage of the core shaft M. The support rollers 55 and 56 are arranged to be adjacent to each other in the left and right directions. The support roller 57 is arranged, for example, on the upper left side of the passage of the core shaft M. The support roller 58 is arranged, for example, on the upper right side of the passage of the core shaft M. The support rollers 55 to 58 are controlled by the support portion opening and closing motor 59 (refer to Figure 3 and Figure 5 (a)) and a power transmission mechanism (e.g., a plurality of well-known rack and pinion mechanisms 60) are used to move and drive the core shaft radially (i.e., open and close drive). As a result, the support rollers 55 to 58 can be arranged at appropriate positions in the core shaft radial direction in accordance with the winding thickness of the core shaft M formed by stacking a plurality of fiber bundles F on the core shaft M. The support portion opening and closing motor 59 is provided in each spiral winding unit 4. The support portion opening and closing motor 59 is electrically connected to the control device 5 (see Figure 3 ), controlled by the control device 5.

[0060] In addition, by driving the support member 54 to move in the vertical direction by the support portion upper and lower motor 54M, the support rollers 55 to 58 can be moved up and down together. Thus, the following problems can be suppressed. That is, since the fiber bundle F wound on the mandrel M is soft, there is a concern that the fiber bundle F sandwiched between the mandrel M and the support rollers 55 and 56 may be deformed (squashed) due to the gravity acting on the mandrel M and the reaction force received from the support rollers 55 and 56. Therefore, there is a concern that the mandrel M may bend due to its own weight. Even if the fiber bundle F is deformed as described above, by using the support portion upper and lower motor 54M to slightly move the support rollers 55 to 58 upward, the fiber bundle F and the mandrel M can be supported at an appropriate height by the support rollers 55 and 56. Therefore, the deflection of the mandrel M can be suppressed.

[0061] When performing the helical winding, the control device 5 controls the pair of conveying units 2 to move the core shaft M to the downstream side in the conveying direction, and controls the disk rotating motor 47 to rotate the disk member 42. Thus, the fiber bundles F are drawn out from each supply cylinder 43 rotating around the core shaft M, and the plurality of fiber bundles F are helically wound around the core shaft M. In addition, the control device 5 controls the guide rotating motor 49 as needed (according to the winding angle of the plurality of fiber bundles F around the core shaft M) to rotate the plurality of fiber bundle guides 44.

[0062] The control device 5 is, for example, a general computer device. The control device 5 includes an input unit (not shown) for receiving a predetermined input, an output unit (not shown) for performing a predetermined output, and a storage unit (not shown) for storing various information. The control device 5 is electrically connected to each component of the long fiber winding device 1. The control device 5 is configured to control each component of the long fiber winding device 1 according to a predetermined program.

[0063] Here, when the fiber bundle F is wound around the mandrel M, the front end of the fiber bundle F needs to be fixed somewhere. If the fiber bundle is wound around the front end in a state where the front end of the fiber bundle is arranged near the circumference of the mandrel in order to fix the front end of the fiber bundle to the mandrel, problems such as uneven thickness of the fiber bundle layer or misalignment of the direction of the fiber bundle wound on the mandrel may occur. As a result, the quality of the product formed by the fiber bundle is reduced. In addition, in the case where the front end of the fiber bundle is fixed to the circumference of the mandrel by means other than the fiber bundle, the quality of the product may be reduced due to the mixing of foreign matter other than the fiber bundle into the product.

[0064] Therefore, in order to prevent foreign matter from being mixed into the product, the filament winding device 1 is configured as follows. In the filament winding device 1, a fiber bundle-containing product including a plurality of fiber bundles F is manufactured by a method described below.

[0065] (Jig mandrel)

[0066] The filament winding device 1 has Figure 6 Multiple jig core shafts MJ shown in (a) and (b). Figure 6 (a) is a side view of a first jig mandrel MJ1 which is one of the plurality of jig mandrels MJ. Figure 6 (b) is a side view of the second jig mandrel MJ2 in addition to the first jig mandrel MJ1. For the sake of simplicity, the axial direction of the jig mandrel MJ is also referred to as the mandrel axial direction, similarly to the axial direction of the mandrel M.

[0067] The plurality of jig core shafts MJ are jigs for fixing the front end of the fiber bundle F (details will be described later). Each of the plurality of jig core shafts MJ is a core material shorter than the core shaft M in the axial direction of the core shaft. The jig core shaft MJ has, for example, the above-mentioned small diameter portions Ma, Mc and a large diameter portion Mh shorter than the large diameter portion Mb in the axial direction of the core shaft.

[0068] The large diameter portion Mh is a portion to which the front end portion of the fiber bundle F is fixed. The large diameter portion Mh is, for example, a substantially cylindrical shape or a substantially cylindrical shape. The shape of the large diameter portion Mh is not limited thereto. The outer diameter of the large diameter portion Mh (large diameter portion Mh1) of the first jig core shaft MJ1 is, for example, substantially equal to the outer diameter of the core shaft M. The outer diameter of the large diameter portion Mh (large diameter portion Mh2) of the second jig core shaft MJ2 is larger than the outer diameter of the first jig core shaft MJ1. In other words, the second jig core shaft MJ2 is thicker than the first jig core shaft MJ1. In the small diameter portion Ma (small diameter portion MaL) of the second jig core shaft MJ2, the outer diameter of the end portion of the inclined portion MaL1 on the large diameter portion Mh2 side in the core shaft axial direction is, for example, substantially equal to the outer diameter of the large diameter portion Mh2. In the small diameter portion Mc (small diameter portion McL) of the second jig mandrel MJ2, the outer diameter of the end portion of the inclined portion McL1 on the large diameter portion Mh2 side in the mandrel axial direction is substantially equal to the outer diameter of the large diameter portion Mh2.

[0069] (Detailed structure of the small diameter part)

[0070] Next, refer to Figure 7 (a) and (b) describe in detail the structures of the small diameter portions Ma and Mc formed on the mandrel M and the jig mandrel MJ, respectively. Figure 7 (a) is a diagram showing the connecting portion Me formed on the small diameter portion Ma as viewed from a position on one side of the small diameter portion Ma in the axial direction of the core shaft. Figure 7 (b) is a diagram showing the connection portion Mg formed on the small diameter portion Mc as viewed from a position on the other side of the small diameter portion Mc in the axial direction of the core shaft.

[0071] Connection part Figure 7 As shown in (a), there are, for example, eight positioning holes Me2. The eight positioning holes Me2 are arranged, for example, at approximately constant angular intervals in the circumferential direction of the core shaft. In other words, the eight positioning holes Me2 are arranged with the center of the core shaft axis as the center point so that the angular positions are staggered by 45 degrees. The number and angular intervals of the positioning holes Me2 mentioned above are only for the convenience of explanation. In other words, the number and angular intervals of the positioning holes Me2 are not limited to the above. In addition, the angular intervals between two adjacent positioning holes Me2 do not have to be constant.

[0072] Connection part Mg Figure 7 As shown in (b), there are, for example, two positioning pins Mg2. For ease of explanation, one of the two positioning pins Mg2 is referred to as positioning pin Mg2a, and the other is referred to as positioning pin Mg2b. When viewed from the axial direction of the core shaft, the positioning pin Mg2a and the positioning pin Mg2b are arranged on opposite sides of each other with the convex portion Mg1 between them. In other words, the positioning pin Mg2b is arranged at a position rotated 180 degrees from the positioning pin Mg2a with the center of the core shaft as the center point.

[0073] In addition, although not shown in the figure, the movable part 22B of the downstream conveying unit 2B has a plurality of positioning holes into which two positioning pins Mg2 can be inserted. These positioning holes can also be arranged in the same way as the eight positioning holes Me2, with the angular positions staggered by 45 degrees. In addition, the movable part 22A of the upstream conveying unit 2A has a plurality of positioning pins that can be inserted into the eight positioning holes Me2. The number of these positioning pins can be, for example, two, the same as the positioning pins Mg2 of each connecting part Mg. With the above structure, the plurality of mandrels M and the jig mandrel MJ can change the angle around the center of the mandrel axis in units of 45 degrees relative to a pair of conveying units 2 when viewed from the front-to-back direction.

[0074] (Sequence of movement of the spindle)

[0075] Next, refer to Figure 8 (a)~ Fig.11 (c) The sequence of the action of moving the jig core shaft MJ and the plurality of core shafts M as the basic action of a pair of conveying units 2 is described. Here, as an example, the sequence of conveying the first jig core shaft MJ1 and the three core shafts M (core shafts M1, M2 and M3) from the upstream side to the downstream side in the conveying direction is described. In the present embodiment, for ease of explanation, the group consisting of core shafts M1, M2 and M3 is referred to as a core shaft group. In addition, the plurality of fiber bundles supplied from the annular winding unit 3 or the spiral winding unit 4 are fixed to the outer peripheral surface (hanging yarn) of the jig core shaft MJ as needed. Further details about the hanging yarn will be described later.

[0076] In the initial state, the jig mandrel MJ and the mandrel M are not mounted on the pair of conveying units 2. In addition, the moving portion 22A of the upstream conveying unit 2A and the moving portion 22B of the downstream conveying unit 2B are arranged at appropriate positions in the front-rear direction.

[0077] First, for example, the operator grasps the rear end of the thinnest first jig mandrel MJ1 among the plurality of jig mandrels MJ using the clamping mechanism 25A, and attaches the front end of the first jig mandrel MJ1 to the moving portion 22A (see Figure 8 (a)). Thus, the rear end of the first jig core shaft MJ1 is held non-rotatably by the clamping mechanism 25A, and the front end is supported non-rotatably by the moving part 22A. At this time, the first jig core shaft MJ1 is located at the end on the upstream side in the conveying direction. The core shaft axial direction of the first jig core shaft MJ1 installed on the moving part 22A is roughly parallel to the front-rear direction.

[0078] Next, when the operator performs a prescribed input operation on the control device 5, the control device 5 controls the cylinder 26A to release the clamping mechanism 25A from holding the first jig core shaft MJ1. Next, the control device 5 controls the traverse motor 28A to move the moving portion 22A rearward. As a result, the first jig core shaft MJ1 moves rearward (that is, downstream in the conveying direction). At this time, the moving distance of the moving portion 22A and the core shaft M1 in the front-to-back direction is, for example, a distance that is approximately the same as the length of the first jig core shaft MJ1 in the core shaft axial direction (refer to Figure 8 (b)). A portion of the first jig core shaft MJ1 transported to the rear in the axial direction is supported by one or more core shaft support portions 45. Alternatively, the control device 5 temporarily stops the movement of the pair of conveying units 2 while the first jig core shaft MJ1 is being transported to the rear. When the movement of the pair of conveying units 2 stops, the operator can perform operations such as hanging yarn on the first jig core shaft MJ1 (described later). In addition, when the movement of the pair of conveying units 2 stops, the operator performs a prescribed input operation on the control device 5, so that the control device 5 can restart the movement of the pair of conveying units 2. In the following, for the sake of simplicity, the description related to the input operation is omitted.

[0079] Next, the control device 5 controls the air cylinder 26A to make the clamping mechanism 25A hold the first jig spindle MJ1. Thus, the first jig spindle MJ1 is held by the clamping mechanism 25A so as to be non-rotatable. Next, the control device 5 controls the traverse motor 28A to move the moving part 22A forward (see Figure 8 (c)). As a result, the moving portion 22A is separated from the first jig core axis MJ1.

[0080] Next, the operator connects the rear end of the mandrel M1, which is the mandrel M for the first product, to the first jig mandrel MJ1 so as to be non-rotatable relative to the rear end of the mandrel M1, and non-rotatably attaches the front end of the mandrel M1 to the moving portion 22A (see FIG. Fig. 9 (a)). The axial direction of the mandrel M1 is substantially parallel to the front-rear direction. Next, the control device 5 controls the cylinder 26A to release the clamping mechanism 25A from holding the first jig mandrel MJ1. Next, the control device 5 controls the traverse motor 28A to move the moving part 22A backward (refer to Fig. 9 (b)). As a result, the first jig mandrel MJ1 and the mandrel M1 are transported to the downstream side in the transport direction. Next, the control device 5 causes the clamping mechanism 25A to hold the mandrel M1 and causes the moving portion 22A to move forward (see Fig. 9 (c)). Thus, the moving portion 22A is isolated from the core shaft M1.

[0081] Next, the operator connects the rear end of the mandrel M2, which is the mandrel M for the second product, to the mandrel M1 in a non-rotatable manner, and attaches the front end of the mandrel M2 to the moving portion 22A (see FIG. Fig.10 (a)). Next, the control device 5 controls the air cylinder 26A to release the clamping mechanism 25A from holding the mandrel M1. Next, the control device 5 controls the traverse motor 28A to move the moving portion 22A backward (see Fig.10 (b)). Thus, the first jig mandrel MJ1, the mandrels M1 and M2 are transported to the downstream side in the transport direction. In addition, thus, the rear end of the first jig mandrel MJ1 is non-rotatably mounted on the moving portion 22B arranged at an appropriate position in the front-to-back direction. Alternatively, after the first jig mandrel MJ1 is moved to the rear, the control device 5 moves the moving portion 22B to the above-mentioned appropriate position.

[0082] Next, the control device 5 controls the air cylinder 26B to make the clamping mechanism 25B hold the mandrel M1. As a result, the mandrel M1 is held by the clamping mechanism 25B so as not to rotate. In this state, the operator separates the first jig mandrel MJ1 from the moving part 22B and the mandrel M1 (see Fig.10 (c)).

[0083] Next, the control device 5 causes the clamping mechanism 25A to hold the mandrel M2 and causes the moving parts 22A and 22B to move forward (see Fig.11 (a)). Thus, the moving part 22A is isolated from the mandrel M2. In addition, the mandrel M1 is non-rotatably mounted on the moving part 22B. Next, the operator connects the rear end of the mandrel M3, which is the mandrel M for the third product, to the mandrel M2 so as to be non-rotatable relative to the mandrel M2, and also non-rotatably mounts the front end of the mandrel M3 to the moving part 22A (see Fig.11 Next, the control device 5 releases the clamping mechanism 25A from holding the mandrel M1, and moves the moving portion 22A backward (see Fig.11 (c)). Thus, the mandrels M1 to M3 are transported to the downstream side in the transport direction. The mandrel M1 reaches the end portion on the downstream side in the transport direction.

[0084] Further illustration is omitted, and in this way, the mandrels M1 to M3 can be sequentially conveyed to the downstream side in the conveying direction. The process of arranging the mandrels M1 to M3 in the mandrel axial direction at a position closer to the upstream side in the conveying direction than the jig mandrel MJ and sequentially connecting them so as not to rotate relative to each other is equivalent to the connection process of the present invention. In addition, for the sake of convenience, the process of conveying all the mandrels M1 to M3 (i.e., one mandrel group) once in the conveying direction from the upstream end to the downstream end is referred to as the unit conveying process.

[0085] exist Fig.11In the state shown in (c), the control device 5 enables the clamping mechanism 25B to hold the core shaft M2, so that the core shaft M1 can be separated from the moving part 22B and the core shaft M2 (not shown in the figure). The operator can transport the core shaft M1 and return it to the front. The operator can re-configure the core shaft M1 at the upstream end in the conveying process as needed. The operator can configure the core shaft M1 on the upstream side immediately before the conveying process of the core shaft M3. Alternatively, the operator can also configure the jig core shaft MJ between the core shaft M1 and the core shaft M3 as needed. In this way, the above-mentioned unit conveying process can be repeated multiple times. In other words, the core shafts M1 to M3 can be moved toward the hoop winding unit 3 and the multiple spiral winding units 4 multiple times. Thereby, multiple fiber bundles can be wound in multiple layers on the core shafts M1, M2 and M3. By adjusting the moving speed of the moving parts 22A and 22B, the speed of moving in can be adjusted. Furthermore, although the order of movement of the mandrels M1 to M3 is described here, four or more mandrels M can be sequentially moved in the conveying direction by the same order.

[0086] (Hanging yarn operation)

[0087] Next, the main reference Fig.12 (a) to (c) of the present invention describe the yarn hanging operation on the jig core shaft MJ, which is a basic operation performed by the operator. Here, as an example, the yarn hanging operation performed by the three spiral winding units 4 on the front side (the spiral winding units 4a, 4b and 4c in order from the front side) is described.

[0088] First, the operator grasps the rear end of the first jig mandrel MJ1 by the clamping mechanism 25A as described above, and attaches the front end of the first jig mandrel MJ1 to the moving portion 22A (see Figure 8 (a)). Afterwards, the operator operates the control device 5 to release the clamping mechanism 25A from holding the first jig core shaft MJ1, and to move the first jig core shaft MJ1 rearward. The control device 5, for example, moves the moving portion 22A until the rear end portion of the large diameter portion Mh1 of the first jig core shaft MJ1 in the front-to-back direction reaches a position substantially the same as that of the plurality of fiber bundle guides 44 of the spiral winding unit 4a disposed at the frontmost side. Afterwards, the control device 5 stops the moving portion 22A. As a result, the first jig core shaft MJ1 stops moving at a position where the yarn can be hung (refer to Fig.12 (a)). In addition, the position where the movement of the first jig core shaft MJ1 stops is not limited to this.

[0089] In this state, the operator draws out the fiber bundles F from the multiple supply drums 43 of the spiral winding unit 4a. Then, the operator guides the leading end of each fiber bundle F to the inner side in the radial direction of the core shaft through the corresponding tension applying section 50 and the fiber bundle guide 44. That is, the operator positions the leading end of each of the multiple fiber bundles F near the first jig core shaft MJ1. Next, the operator uses a fixing member such as a tape T (preferably a maintenance tape) to adhere the leading end of each of the multiple fiber bundles F to the outer peripheral surface of the large diameter portion Mh1 of the first jig core shaft MJ1 (see FIG. 1 ). Fig.12 (a)). Thus, the plurality of front end portions are fixed to the first jig core shaft MJ1. That is, the yarn hanging to the first jig core shaft MJ1 in the spiral winding unit 4a is completed. Preferably, the operator adheres the front end portions of the plurality of fiber bundles F to the outer peripheral surface of the large diameter portion Mh1 at approximately equal angular intervals (angular intervals around the center of the core shaft).

[0090] Next, the operator operates the control device 5 to move the first jig core shaft MJ1 backward. The control device 5 moves the moving part 22A backward at an appropriate speed, and controls the disk rotating motor 47 of the spiral winding unit 4a to rotate the disk component 42 in a specified direction at a specified rotation speed. As a result, the front end portions of the plurality of fiber bundles are pulled by the first jig core shaft MJ1, and the fiber bundles F are respectively drawn out from the plurality of supply drums 43 of the spiral winding unit 4a. Moreover, the plurality of fiber bundles F are wound around the outer peripheral surface of the first jig core shaft MJ1 at a specified winding angle (see Fig.12 (b)). The control device 5 moves the moving part 22A until the rear end of the large diameter part Mh1 reaches a position substantially the same as the plurality of fiber bundle guides 44 of the spiral winding unit 4a. Next, the operator performs the yarn hanging on the first jig core shaft MJ1 in the spiral winding unit 4b in the same manner as the above method (refer to Fig.12 (b)).

[0091] Then, after the operator attaches the mandrel M1 to the first jig mandrel MJ1 and the moving portion 22A, for example, the operator operates the control device 5 to move the first jig mandrel MJ1 backward. The control device 5 moves the moving portion 22A backward at an appropriate speed, and controls the disk rotating motors 47 of the spiral winding units 4a and 4b to rotate the disk members 42 in a predetermined direction at a predetermined rotation speed. Thus, the plurality of fiber bundles F supplied from the spiral winding unit 4b are wound around the first jig mandrel MJ1 at a predetermined winding angle (see Fig.12 (c)). After the plurality of fiber bundles F supplied from the spiral winding unit 4a are wound around the first jig core shaft MJ1, they are then wound around the core shaft M1 (see Fig.12(c)). Therefore, it is not necessary to hang the yarn on the core shaft M1. Thus, the front end of the fiber bundle F is prevented from being mixed into the core shaft M1. In addition, the winding angle of the fiber bundle F on the core shaft M1 before the winding becomes thicker is substantially equal to the winding angle of the fiber bundle F on the first jig core shaft MJ1.

[0092] The control device 5 moves the moving part 22A until the rear end of the large diameter part Mh1 reaches substantially the same position as the plurality of fiber bundle guides 44 of the spiral winding unit 4c. Then, the operator performs the yarn hooking to the first jig core shaft MJ1 in the spiral winding unit 4c in the same manner as described above (see Fig.12 (c)). As described above, as an example, the yarn is hung on the first jig core shaft MJ1.

[0093] (Fiber bundle winding method)

[0094] Next, refer to Figure 13-14 (b) will be described a method of winding a plurality of fiber bundles F around a plurality of mandrels M in the filament winding device 1 (ie, a method of producing a fiber bundle-containing product). Fig.13 1 is a flowchart showing the procedure of winding a plurality of fiber bundles around a plurality of mandrels M. Fig.14 (a) and (b) are explanatory diagrams showing changes in the winding angle of the fiber bundle F.

[0095] In order to reduce the complexity of the description, detailed description about the winding of the fiber bundle (not shown) by the hoop winding unit (the hoop winding process) is omitted. The hoop winding process is performed by sequentially carrying out hoop winding on the plurality of mandrels M while sequentially conveying the plurality of mandrels M to the downstream side in the conveying direction, for example, when the plurality of spiral winding units 4 are not used. In the hoop winding process, the operator may also perform the same yarn hanging on the jig mandrel MJ as the yarn hanging described above.

[0096] Hereinafter, the order of winding the fiber bundle F by the plurality of spiral winding units 4 will be described in more detail. Hereinafter, the process of sequentially performing spiral winding on the plurality of mandrels M by the plurality of spiral winding units 4 will be referred to as the spiral winding process. The number of spiral winding units 4 used in the spiral winding process is appropriately adjusted according to the change of the winding angle and / or the increase in the diameter of the fiber bundle-containing product (winding becomes thicker), etc. The number of spiral winding units 4 used is adjusted so that the coverage rate of the fiber bundle F on the mandrel M in each unit feeding process is approximately equal (for example, about 100%). However, in the following example, in order to suppress the complexity of the description, the number of spiral winding units 4 used is assumed to be fixed (not changed). For example, a plurality of fiber bundles F are supplied by three spiral winding units 4 out of five spiral winding units 4. In addition, in order to suppress the complexity of the description, the exhaustion of the fiber bundle F contained in the supply cylinder 43 and the replacement of the supply cylinder 43 accompanying this are not considered.

[0097] First, after the operator installs the first jig core shaft MJ1 on the upstream conveying unit 2A as described above, the operator performs a prescribed operation on the control device 5. The control device 5 controls a pair of conveying units 2 to convey the first jig core shaft MJ1 to the downstream side in the conveying direction (jig conveying process). The control device 5 stops the movement of the first jig core shaft MJ1 when the first jig core shaft MJ1 reaches the vicinity of the spiral winding unit 4 where yarn hanging is required. The operator draws out a plurality of fiber bundles F from the plurality of spiral winding units 4 used at appropriate times, and sequentially hangs yarn on the first jig core shaft MJ1 (yarn hanging process. S101. Refer to Fig.12 (a)~(c)).

[0098] The operator performs the installation and removal operations of the mandrel M (or the jig mandrel MJ) of the pair of conveying units 2 and the operation of the control device 5 as needed. The control device 5 controls the pair of conveying units 2 and the spiral winding unit 4 according to the operation content of the control device 5 performed by the operator, and performs the winding of the fiber bundle F onto a plurality of mandrels M belonging to a specified mandrel group (S102). More specifically, while performing the above-mentioned unit conveying process, the spiral winding unit 4 to which the yarn-hanging fiber bundle F is supplied winds the fiber bundle F onto a plurality of mandrels M at a specified winding angle in sequence (spiral winding process). In the unit conveying process, the operator arranges the plurality of mandrels M in the mandrel axial direction as described above and connects them in sequence so as not to rotate relative to each other (connection process).

[0099] During the unit conveying process, the operator removes the jig mandrel MJ or the mandrel M conveyed to the downstream end in the conveying direction from the downstream conveying unit 2B in sequence. Before removing the jig mandrel MJ from the downstream conveying unit 2B, the operator cuts off each fiber bundle F wound on the jig mandrel MJ using a cutter (not shown). In addition, at this time, the operator fixes the end of each fiber bundle F extending to the downstream side from the rear end of the mandrel M arranged immediately upstream of the jig mandrel MJ in the conveying direction to one of the small diameter portion Ma and the small diameter portion Mc of the mandrel M using a tape T. The small diameter portion on one side is the portion of the mandrel M arranged on the downstream side in the conveying direction. In addition, before removing the mandrel M from the downstream conveying unit 2B, the operator cuts off each fiber bundle F wound on the other of the small diameter portions Ma and Mc of the mandrel M using a cutter (not shown). The other small diameter portion is the portion of the mandrel M arranged on the upstream side in the conveying direction. At this time, the operator fixes the end of each fiber bundle F extending from the front end of the mandrel M to the upstream side to the other small diameter portion using the tape T.

[0100] The operator determines whether to continue winding the fiber bundle F around the mandrel M (S103) based on, for example, a process table (not shown) recording the manufacturing order of the fiber bundle-containing product each time a unit feeding process is performed. The timing of the determination is, for example, when the mandrel M on which the fiber bundle F is wound at the end of each unit feeding process is mounted on the upstream feeding unit 2A. When it is determined that the winding of the fiber bundle F around the mandrel M is not to be continued (S103: No), for example, after the winding of the fiber bundle F around the last mandrel M in the last unit feeding process is completed, the manufacturing of the fiber bundle-containing product is completed. When it is determined that the winding of the fiber bundle F around the mandrel M is to be continued (S103: Yes), the operator further performs the determination described below.

[0101] The operator determines whether to change the winding angle in the next unit feeding process (S104). If the winding angle is not changed (S104: No), the operator returns to S102 and starts the next unit feeding process. At this time, it is not necessary to hang the yarn on the mandrel M installed in sequence on the upstream feeding unit 2A.

[0102] When the winding angle is changed (S104: Yes), the operator performs the installation of the jig core shaft MJ to the upstream conveying unit 2A and the change of the winding angle as follows (S105). The spiral winding process before the winding angle is changed is equivalent to the first spiral winding process of the present invention. The winding angle in the first spiral winding process is equivalent to the first winding angle of the present invention. The spiral winding process after the winding angle is changed is equivalent to the second spiral winding process of the present invention. The winding angle in the second spiral winding process is equivalent to the second winding angle of the present invention. The spiral winding process includes the first spiral winding process and the second spiral winding process. The winding angle is not only the size of the inclination angle of the fiber bundle F relative to the core shaft M, etc., but also considers whether the fiber bundle F is wound clockwise or counterclockwise when viewed from the front and rear directions. For example, when the fiber bundle F is wound clockwise when viewed from the front side and the inclination angle of the fiber bundle F relative to the axial direction of the core shaft is 45 degrees, the winding angle is defined as one of ±45 degrees (for example, +45 degrees). In addition, when the fiber bundle F is wound counterclockwise when viewed from the front side and the above-mentioned inclination angle is 45 degrees, the winding angle is defined as the other of ±45 degrees (for example, -45 degrees). Changes in the magnitude of the winding angle (for example, from 45 degrees to 5 degrees) and changes in the sign of the winding angle (for example, from +45 degrees to -45 degrees) are both included in the change of the winding angle.

[0103] In the operation of changing the winding angle, first, the operator installs an appropriate jig core shaft MJ (details will be described later) on the upstream conveying unit 2A, and connects the jig core shaft MJ to the core shaft M on the most upstream side in the conveying direction so as to be non-rotatable relative to the jig core shaft M. The core shaft M on the most upstream side is the core shaft M around which a plurality of fiber bundles F are wound at the end of the first spiral winding step. The core shaft M is equivalent to the first core shaft of the present invention. Next, the operator operates the control device 5 so as to supply the fiber bundle F for which the winding angle needs to be changed to the spiral winding unit 4 (in the Fig.14 In (a), the spiral winding unit 4 a) transports the jig core shaft MJ. The step of transporting the jig core shaft MJ in this way corresponds to the winding angle changing jig transporting step of the present invention.

[0104] Next, the operator uses tape T (see Fig.14 The tape Tc of (a) fixes the midway portion of each of the plurality of fiber bundles supplied from the spiral winding unit 4a to the large diameter portion Mh of the jig core shaft MJ (winding angle change fixing process). Thereafter, the control device 5 controls a pair of conveying units 2 while rotating the disk component 42 of the spiral winding unit 4a at a rotation speed different from that of the disk components 42 of the other spiral winding units 4. The rotation speed here is a concept that includes not only the speed of rotation but also the direction of rotation. As a result, the winding angle at the upstream side of the tape Tc in the conveying direction is different from the winding angle at the downstream side of the tape Tc in the conveying direction (refer to Fig.14 (b)). The same operation is performed on the other spiral winding units 4 in sequence, thereby changing the winding angle of all the fiber bundles F on the jig core shaft MJ. At an appropriate time, the operator connects one of the multiple core shafts M to the jig core shaft MJ so that it cannot rotate relative to each other (winding angle change connection process). The one core shaft M is the core shaft M on which the multiple fiber bundles F are initially wound in the second spiral winding process. The one core shaft M is equivalent to the second core shaft of the present invention. After that, the operator causes the long fiber winding device 1 to perform the next unit delivery process. In this way, the winding angle of the fiber bundle F is changed and the unit delivery process is repeated.

[0105] (Change of mandrel angle)

[0106] Next, refer to Fig.15 (a) and (b) illustrate the angle change of the core axis M around the center of the core axis. Fig.15 (a) is an explanatory diagram showing the change in the angle of the mandrel M around the center of the mandrel axis. Fig.15 (b) is a graph for explaining the change of the angle. The horizontal axis of the graph shows the total number of unit conveying processes. The vertical axis of the graph shows the angle of the mandrel M around the center of the mandrel axis.

[0107] As described above, in the long fiber winding device 1, a plurality of mandrels M are arranged and held in a substantially horizontal direction, and supported from below by the mandrel support portion 45. In such a structure, since the fiber bundle F, which is generally softer than the mandrel M, is pressed from below by the mandrel support portion 45, the fiber bundle F wound on the mandrel M is easily deformed. Therefore, there is a concern that the shape of the product may be deformed. Therefore, in order to suppress the deformation of the shape of the product, it is preferable to implement the following method.

[0108] As described above, the plurality of mandrels M can change the angle around the mandrel axis center in units of 45 degrees relative to the pair of conveying units 2 when viewed from the front-rear direction (see FIG. Fig.15 (a)). Therefore, the operator changes the angle of the plurality of mandrels M around the center of the mandrel shaft each time the unit conveying process is performed at a predetermined first number of times. The first number of times is a predetermined number of times or more. In the following, for the sake of convenience, the angle around the center of the mandrel shaft is defined as follows. Fig.15 As shown by the solid line in (a), when the positioning pin Mg2a is located directly above the protrusion Mg1 and the positioning pin Mg2b is located directly below the protrusion Mg1, the angle around the center of the core shaft is defined as 0 degrees. In addition, for example, when the positioning pin Mg2a is tilted 45 degrees clockwise from directly above the protrusion Mg1 when viewed from the front, the angle around the center of the core shaft is defined as 45 degrees. Fig.15As shown by the dotted line in (a), the angular position of the positioning pin Mg2 around the center of the mandrel axis can be changed in units of 45 degrees. The range of the angle around the center of the mandrel axis is defined as, for example, greater than 0 degrees and less than 360 degrees. In this way, the angle of the mandrel M around the center of the mandrel axis can be changed from 0 degrees to 360 degrees (strictly speaking, to 315 degrees in this embodiment) in units of 45 degrees.

[0109] When the first number is set to, for example, two times, the operator, for example, Fig.15 As shown in the diagram of (b), each time the unit conveying process is performed twice, the angle of the plurality of mandrels M around the center of the mandrel axis is changed to a specified angle other than a multiple of 360 degrees. Hereinafter, the specified angle is also referred to as a "changed angle". The changed angle is preferably unified among the plurality of mandrels M in one unit conveying process, for example. In the example of the present embodiment, the specified angle (changed angle) is 135 degrees. As a point of note, in the present embodiment, after the sixth unit conveying process is performed, for example, the angle of the plurality of mandrels M around the center of the mandrel axis is changed from 270 degrees to 45 degrees. The 45 degrees is an angle calculated by subtracting 360 degrees from 405 degrees obtained by adding 135 degrees to 270 degrees.

[0110] By changing the angles of the plurality of mandrels M around the center of the mandrel axis in this manner, the position of the fiber bundle-containing product pressed from below by the mandrel support portion 45 can be changed in the mandrel circumferential direction. That is, the fiber bundle F stacked at the same position in the mandrel circumferential direction of each mandrel M can be prevented from being repeatedly pressed from below by the mandrel support portion 45.

[0111] (Appropriate jig mandrel)

[0112] Next, the above-mentioned "appropriate jig core shaft MJ" will be explained. Although not shown in the figure, by repeatedly performing the unit feeding process multiple times, multiple layers of multiple fiber bundles F are wound on multiple core shafts M belonging to the above-mentioned specified core shaft group. As a result, the diameter of the fiber bundle-containing product including the fiber bundles F wound on the multiple core shafts M is increased (the winding becomes thicker). In the state where the fiber bundle-containing product is wound thicker, if a thin first jig core shaft MJ1 is used, for example, when changing the winding angle, the following problem may occur. That is, when the diameter of the first jig core shaft MJ1 is greatly different from the diameter of the fiber bundle-containing product, even if the winding angle of the fiber bundle F to the first jig core shaft MJ1 is approximately equal to the target angle, there is a possibility that the winding angle of the fiber bundle F to the fiber bundle-containing product deviates from the target angle. The reason is as follows. If the diameter of the jig core shaft MJ is different from the diameter of the fiber bundle-containing product, the relative circumferential speed of the plurality of fiber bundle guides 44 of the spiral winding unit 4 with respect to the jig core shaft MJ and the relative circumferential speed with respect to the fiber bundle-containing product are different from each other. Therefore, there is a concern that the winding angle of the fiber bundle F to the fiber bundle-containing product and the winding angle of the fiber bundle F to the first jig core shaft MJ1 may be greatly different.

[0113] Therefore, in order to suppress the deviation of the winding angle of the fiber bundle F to the fiber bundle-containing product from the target angle, the following method is preferably implemented. That is, when the unit conveying process is performed for a predetermined second time or more after S101, when, for example, the winding angle is changed, the operator preferably installs the second jig core shaft MJ2 to the upstream conveying unit 2A. In this case, the difference between the diameter of the second jig core shaft MJ2 and the diameter of the fiber bundle-containing product is smaller than the difference between the diameter of the first jig core shaft MJ1 and the diameter of the fiber bundle-containing product. As a result, it is easy to make the winding angle of the fiber bundle F to the second jig core shaft MJ2 roughly consistent with the winding angle of the fiber bundle F to the thickened fiber bundle-containing product.

[0114] As described above, after the front end portions of the plurality of fiber bundles F are fixed to the jig core shaft MJ, the plurality of core shafts M are sequentially connected so as not to rotate relative to each other at a position upstream of the jig core shaft MJ in the conveying direction and sequentially conveyed to the downstream side in the conveying direction. The plurality of core shafts M sequentially conveyed in this manner are spirally wound. Thus, it is possible to avoid the front end portions of the fiber bundles F from being mixed into the product formed by winding the plurality of fiber bundles F around the plurality of core shafts M, and to sequentially wind the plurality of fiber bundles F around each core shaft M. Therefore, in the long fiber winding device 1 that spirally winds the core shaft M while continuously conveying it, it is possible to avoid the mixing of foreign matter into the product.

[0115] In addition, the method for manufacturing a fiber bundle-containing product includes a winding angle change jig feeding step, a winding angle change fixing step, and a winding angle change connecting step. Thus, when the winding angle is changed, the middle portions of the plurality of fiber bundles F are fixed to the jig core shaft MJ. Therefore, it is possible to prevent the middle portions of the fiber bundles F bent by changing the winding angle from being mixed into the product.

[0116] In addition, in the manufacturing method of the fiber bundle-containing product, each time the first unit conveying step is performed more than once, the angle of the plurality of mandrels M around the axis in the next unit conveying step is changed to a predetermined angle other than a multiple of 360 degrees. Thus, each time the first unit conveying step is performed, the position of the fiber bundle-containing product pressed from below by the mandrel support portion 45 can be changed in the mandrel circumferential direction. That is, the fiber bundle F stacked at the same position in the mandrel circumferential direction of the mandrel M can be suppressed from being repeatedly pressed from below by the mandrel support portion 45. Therefore, the degree of deformation of the fiber bundle F can be suppressed from being uneven in the mandrel circumferential direction. Therefore, the deformation of the shape of the product can be suppressed.

[0117] In addition, when the jig core shaft MJ is used when the number of executions of the unit feeding process is equal to or greater than the predetermined second number, the second jig core shaft MJ2 thicker than the first jig core shaft MJ1 is attached to the upstream feeding unit 2A. As a result, the winding angle of the fiber bundle F around the second jig core shaft MJ2 can be easily made substantially consistent with the winding angle of the fiber bundle F around the thickened fiber bundle product. Therefore, the winding angle of the fiber bundle F around the fiber bundle product can be made as close to the target angle as possible.

[0118] Next, a modified example in which the above-described embodiment is modified will be described. However, the same reference numerals are given to parts having the same configuration as the above-described embodiment, and the description thereof will be omitted as appropriate.

[0119] (1) In the above embodiment, each time the first unit conveying process is performed for a predetermined number of times, the angle of the plurality of mandrels M around the center of the mandrel axis is changed by 135 degrees. However, this is not limited to this. The above-mentioned change angle may also be an angle other than 135 degrees (for example, 45 degrees, 90 degrees, 180 degrees, etc.). Alternatively, the angular interval of the plurality of positioning holes Me2 around the center of the mandrel axis may also be an angle other than 45 degrees. Alternatively, such an operation of changing the angle around the center of the mandrel axis may not be performed.

[0120] (2) In the embodiments described above, the jig mandrel MJ has the small diameter portions Ma and Mc in the same manner as the mandrel M. However, this is not limited to this. The jig mandrel MJ may also have a small diameter portion (not shown) having a shape different from that of the small diameter portions Ma and Mc of the mandrel M. In addition, the shape of the small diameter portions Ma and Mc of the mandrel M is not limited to the above-described shapes.

[0121] (3) In the above-described embodiments, the long fiber winding device 1 includes a first jig core shaft MJ1 and a second jig core shaft MJ2 as the jig core shaft MJ. The number of the jig core shafts MJ is not limited thereto. For example, one or more jig core shafts thicker than the second jig core shaft MJ2 may be provided. Alternatively, the long fiber winding device 1 may include only the first jig core shaft MJ1 as the jig core shaft MJ.

[0122] (4) In the above-described embodiments, when the winding angle of the fiber bundle F on the core shaft M is changed, the middle portion of each of the plurality of fiber bundles F is fixed to the jig core shaft MJ. However, this is not limited to this. For example, each time a unit feeding process is completed, the plurality of fiber bundles F supplied from the spiral winding unit 4 may be cut. Furthermore, when the jig core shaft MJ is fed to the spiral winding unit 4 again, the front end portion of each of the plurality of fiber bundles F may be fixed to the jig core shaft MJ, thereby changing the winding angle. However, in this case, production efficiency is reduced.

[0123] (5) In the above-described embodiments, the mandrel M and the jig mandrel MJ have small diameter portions Ma and Mc. However, this is not limited to this. The mandrel M may also have two ends (not shown) with a diameter substantially the same as that of the large diameter portion Mb instead of the small diameter portions Ma and Mc. The jig mandrel MJ may also have two ends (not shown) with a diameter substantially the same as that of the large diameter portion Mh instead of the small diameter portions Ma and Mc.

[0124] (6) In the above-described embodiments, the disk component 42 and the fiber bundle guide 44 are configured to be integrally rotatable around the center of the mandrel axis. However, this is not limited to this. The disk component 42 and the fiber bundle guide 44 may not be configured to be rotatable around the center of the mandrel axis. In this case, a pair of conveying units 2 may also be configured to rotate a plurality of mandrels M around the center of the mandrel axis and move in the conveying direction. However, in this case, it is not possible to simultaneously make the winding angles of the fiber bundle F on the plurality of mandrels M different between the plurality of spiral winding units 4 that supply the plurality of fiber bundles F.

[0125] (7) In the above-described embodiments, the long fiber winding device 1 includes five spiral winding units 4. However, the number of the plurality of spiral winding units 4 is not limited thereto. The long fiber winding device 1 may include less than five or more than five spiral winding units 4. In addition, the long fiber winding device 1 may include a plurality of hoop winding units 3.

[0126] (8) The positional relationship between the hoop winding unit 3 and the plurality of helical winding units 4 in the mandrel axial direction is not limited to the above relationship. For example, the hoop winding unit 3 may be arranged on the front side relative to the plurality of helical winding units 4.

[0127] (9) In the above-described embodiments, the fiber bundle is impregnated with resin before being wound around the mandrel M. However, the present invention is not limited thereto. For example, after the fiber bundle not impregnated with resin is wound around the mandrel M, the fiber bundle wound around the mandrel M may be impregnated with resin.

[0128] Description of Reference Numerals

[0129] 1 Long fiber winding device

[0130] 2 Conveying unit

[0131] 4 Helical winding unit

[0132] 45 Mandrel support

[0133] F Fiber bundle

[0134] M Mandrel (Product Mandrel)

[0135] MJ Fixture Mandrel

[0136] MJ1 No. 1 jig mandrel

[0137] MJ2 Second jig mandrel.

Claims

1. A method for producing a fiber bundle-containing product, comprising producing a plurality of fiber bundle-containing products including the plurality of fiber bundles in a long fiber winding device for winding a plurality of fiber bundles around respective core shafts, wherein: The long fiber winding device comprises: a jig core shaft, the jig core shaft being shorter than the plurality of product core shafts in a predetermined core shaft axial direction; a conveying unit, the conveying unit being configured to sequentially convey the jig core shaft and the plurality of product core shafts arranged and connected in the core shaft axial direction from the upstream side to the downstream side in a predetermined conveying direction along the core shaft axial direction; and a plurality of spiral winding units, the plurality of spiral winding units being arranged in the core shaft axial direction, each being configured to spirally wind the plurality of fiber bundles on the jig core shaft and the plurality of product core shafts, The method for producing the fiber bundle-containing product comprises: a jig conveying step of installing the jig core shaft on the conveying unit and conveying the jig core shaft to a specified spiral winding unit among the plurality of spiral winding units; a yarn hanging step of fixing the front end portion of each of the plurality of fiber bundles supplied from the predetermined spiral winding unit to the jig core shaft after the jig feeding step; a connecting step of arranging the plurality of products with the mandrel in the axial direction of the mandrel and connecting them in sequence so as to be non-rotatable relative to each other at a position upstream of the mandrel in the conveying direction after the jig conveying step; and The helical winding step is to sequentially carry out helical winding on the plurality of product mandrels by the plurality of helical winding units while sequentially conveying the plurality of product mandrels coupled in the coupling step toward the downstream side in the conveying direction after the yarn hanging step.

2. The method for producing a fiber bundle-containing product according to claim 1, characterized in that: The helical winding step includes: a first helical winding step of winding the plurality of fiber bundles around the plurality of product mandrels at a predetermined first winding angle; and a second helical winding step of winding the plurality of fiber bundles around the plurality of product mandrels at a second winding angle different from the first winding angle. The method for producing the fiber bundle-containing product comprises: A winding angle changing jig conveying step of connecting the jig core shaft to the upstream side of the conveying direction of the first core shaft among the plurality of product core shafts on which the plurality of fiber bundles are wound at the end of the first spiral winding step so as to be non-rotatable relative to each other, and conveying the jig core shaft to the downstream side in the conveying direction; a winding angle changing and fixing step of fixing the midway portion of each of the plurality of fiber bundles to the jig core shaft after the winding angle changing jig feeding step; and The winding angle changing and connecting step connects a second mandrel, of the plurality of product mandrels, around which the plurality of fiber bundles are initially wound in the second helical winding step, to the jig mandrel in a relatively non-rotatable manner.

3. The method for producing a fiber bundle-containing product according to claim 1 or 2, characterized in that: The conveying direction has a horizontal component, The filament winding device includes a mandrel support portion that supports a middle portion in the mandrel axial direction of the plurality of product mandrels connected in the mandrel axial direction. Whenever the first unit conveying process is performed more than once, the angle of the plurality of product core shafts around the axis in the next unit conveying process is changed to a specified angle other than a multiple of 360 degrees, wherein the unit conveying process refers to conveying the core shaft group including the plurality of product core shafts from the upstream end to the downstream end in the conveying direction once.

4. The method for producing a fiber bundle-containing product according to any one of claims 1 to 3, characterized in that: In the jig conveying step, a predetermined first jig core shaft is used as the jig core shaft, After the jig conveying process, after executing the unit conveying process a specified second time or more, a second jig core shaft thicker than the first jig core shaft is installed on the conveying unit, wherein the unit conveying process refers to conveying the core shaft group including the plurality of product core shafts from the upstream end to the downstream end in the conveying direction once.

5. A long fiber winding device, which winds a plurality of fiber bundles on each of a plurality of mandrels, characterized in that: have: a jig mandrel, the jig mandrel being shorter than the plurality of product mandrels in a prescribed mandrel axial direction; a conveying unit configured to sequentially convey the jig mandrel and the plurality of product mandrels arranged and connected in the axial direction of the mandrel from an upstream side to a downstream side in a predetermined conveying direction along the axial direction of the mandrel; and A plurality of helical winding units are arranged in the axial direction of the mandrel, and each of the helical winding units is configured to be able to helically wind the plurality of fiber bundles around the jig mandrel and the plurality of product mandrels.

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