Filament winding method and filament winding device

Abstract

The present invention provides a fiber winding method and a fiber winding device. The FW device (10) includes a bobbin drive unit (12), a winding device (18), and a tension applying device (20). The FW method using the FW device (10) includes a midway stop process, which is a process of stopping the operation of the winding device (18) midway during the winding of the delivered fiber portion (430) onto a workpiece (500). In the midway stop process, while the delivered fiber portion (430) continues to be delivered from the fiber winding unit (412), the pressing unit (92) is pressed against the delivered fiber portion (430) while being moved, thereby lengthening the conveying path. Accordingly, it is possible to suppress the time required for fiber winding from being prolonged, suppress the cost of fiber winding from being increased, and prevent the delivered fiber portion wound on the workpiece from being loosened.

Description

Technical Field

[0001] The invention relates to a fiber winding method and a fiber winding device. Background Art

[0002] Japanese Patent Application Publication No. 2005-255359 discloses a fiber winding device (hereinafter sometimes referred to as a FW device). The FW device includes a bobbin motor, a winding device, and a tension applying device. The bobbin motor rotates a bobbin component. The bobbin component includes a bobbin and a fiber roll, wherein the fiber roll is formed by winding a fiber bundle around the bobbin. The winding device applies tension to a fiber portion delivered from the fiber roll and winds the delivered fiber portion onto a workpiece.

[0003] The tension applying device is provided on the conveying path of the fiber delivery portion from the bobbin drive portion to the winding device. The tension applying device has a pressing portion (dancer roll) for pressing the fiber delivery portion. The pressing portion of the tension applying device of the FW device presses the fiber delivery portion with a constant force. Generally speaking, the tension applying device detects the position of the pressing portion and controls the delivery speed from the fiber roll portion according to the change in the position, thereby performing feedback control to keep the position and pressing force of the pressing portion constant. In addition, in the case where the feedback control cannot keep up with the high-speed operation, there is also active control to move the pressing portion according to the winding speed or winding length of the winding device. By these tension applying devices, the tension of the fiber delivery portion is stabilized. Summary of the Invention

[0004] However, in filament winding methods using FW equipment, a stoppage step is sometimes performed to perform a predetermined intermediate process. This stoppage step involves stopping the winding device midway through the process of winding and feeding the fiber portion onto a workpiece. Intermediate processing can include, for example, measuring the winding accuracy of the fiber portion being fed onto the workpiece. Alternatively, intermediate processing can include changing the winding angle of the fed fiber portion relative to the workpiece. The aforementioned prior art does not describe a stoppage step.

[0005] When the fiber roll is stopped during the mid-stop process, a relatively high tension is applied to the fiber roll. This can cause the fiber roll to be excessively tightened by the fiber roll, causing it to deform. Deformation of the fiber roll requires correcting the roll or replacing the spool. This increases the time required for fiber winding and the cost of fiber winding.

[0006] The purpose of the present invention is to solve the above technical problems.

[0007] One embodiment of the present invention is a fiber winding method using a fiber winding device, the fiber winding device comprising a bobbin drive unit, a winding device, and a tension applying device, wherein the bobbin drive unit is configured to rotate a bobbin member having a bobbin and a fiber roll portion, the fiber roll portion being formed by winding a fiber bundle around the bobbin; the winding device is configured to wind a feed fiber portion fed from the fiber roll portion onto a workpiece while applying tension to the feed fiber portion; the tension applying device is disposed in a feed path of the feed fiber portion extending from the bobbin drive unit to the winding device, the tension applying device comprising a pressing portion for pressing the feed fiber portion; the fiber winding method comprising an intermediate stop step for stopping the operation of the winding device in the middle of winding the feed fiber portion onto the workpiece; in the intermediate stop step, the pressing portion is moved while pressing the feed fiber portion while the feed fiber portion continues to be fed from the fiber roll portion, thereby lengthening the feed path.

[0008] Another embodiment of the present invention is a fiber winding device comprising a bobbin driving unit, a winding device and a tension applying device, wherein the bobbin driving unit is used to rotate a bobbin component having a bobbin and a fiber roll portion, the fiber roll portion being formed by winding a fiber bundle on the bobbin; the winding device winds a feed fiber portion fed from the fiber roll portion onto a workpiece while applying tension to the feed fiber portion; the tension applying device is arranged on a conveying path of the feed fiber portion from the bobbin driving unit to the winding device, the tension applying device having a pressing portion for pressing the feed fiber portion, and the fiber winding device having a bobbin control unit, a winding control unit and a tension applying device. The force control section comprises the following: the bobbin control section controls the bobbin driving section; the winding control section controls the winding device; the tension control section controls the tension applying device; the winding control section controls the winding device to stop the movement of the winding device in the middle of winding the delivered fiber section onto the workpiece; when the winding control section stops the movement of the winding device in the middle, the bobbin control section controls the bobbin driving section to continue to deliver the delivered fiber section from the fiber winding section; the tension control section controls the tension applying device to press the pressing section against the delivered fiber section while moving the pressing section, thereby lengthening the conveying path.

[0009] According to the present invention, the delivered fiber portion continues to be fed from the fiber roll during the mid-stop process. This prevents the fiber roll from being excessively tightened by the delivered fiber portion during the mid-stop process, thereby suppressing deformation of the fiber roll. Consequently, there is no need to correct the fiber roll or replace the spool component. This prevents the time required for fiber winding from increasing, and reduces the cost of fiber winding.

[0010] Furthermore, since the pressing portion is moved during the midway stop process to lengthen the conveying path, appropriate tension can be continuously applied to the feed fiber portion, thereby preventing the feed fiber portion wound on the workpiece from becoming loose.

[0011] The above-mentioned objects, features and advantages will be easily understood through the following description of the embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of a filament winding device according to one embodiment of the present invention.

[0013] Figure 2 This is a schematic longitudinal sectional view of a high-pressure gas tank.

[0014] Figure 3 yes Figure 2 Detailed cross-sectional view of the portion indicated by arrow III.

[0015] Figure 4A yes Figure 1 A plan view of the first tension maintaining portion shown. Figure 4B yes Figure 4A 1st operation explanatory diagram of the first tension maintaining unit shown. Figure 4C yes Figure 4A FIG2 is an explanatory diagram of the second operation of the first tension maintaining unit shown in FIG2.

[0016] Figure 5 yes Figure 1 Control block diagram.

[0017] Figure 6 is a flow chart illustrating a filament winding method.

[0018] Figure 7A This is a top view of a tension applying device. Figure 7B yes Figure 7A The first operation explanatory diagram of the tension applying device shown. Figure 7C yes Figure 7A The second operation explanatory diagram of the tension applying device shown.

[0019] Figure 8 It is a detailed description Figure 6 Flowchart of the process of stopping midway.

[0020] Figure 9 It is a detailed description Figure 6 Flowchart of the restart winding process.

[0021] Figure 10 It is a plan view illustrating a tension applying device according to a first modification.

[0022] Figure 11 It is a plan view illustrating a tension applying device according to a second modification. DETAILED DESCRIPTION

[0023] like Figure 1 As shown, a filament winding apparatus (hereinafter sometimes referred to as "FW apparatus 10") according to one embodiment of the present invention manufactures a high-pressure gas tank 502 by winding a plurality of fiber sections 430 fed from a plurality of bobbin members 400 around a workpiece 500. The high-pressure gas tank 502 manufactured using the FW apparatus 10 is, for example, mounted on a fuel cell vehicle. In this case, the high-pressure gas tank 502 is filled with high-pressure hydrogen. Alternatively, the high-pressure gas tank 502 may be filled with a fuel gas other than hydrogen.

[0024] exist Figure 2 In the figure, the high-pressure gas tank 502 has an inner liner 504, a first interface 506, a second interface 508 and a reinforcement portion 510. The inner liner 504, the first interface 506 and the second interface 508 form a workpiece 500. The inner liner 504 is made of, for example, a high-density polyethylene (HDPE) resin or a nylon resin (PA6) that exhibits hydrogen barrier properties. The first interface 506 is installed at one axial end of the inner liner 504. The second interface 508 is installed at the other axial end of the inner liner 504. The reinforcement portion 510 has a plurality of reinforcement layers 512 stacked in the thickness direction of the inner liner 504 (see Figure 3 ).

[0025] The product manufactured using the FW device 10 is not limited to the high-pressure gas tank 502. In other words, the product manufactured using the FW device 10 may be, for example, a solid component.

[0026] like Figure 1 As shown, the FW device 10 includes a plurality of bobbin driving units 12 , a plurality of tension maintaining units 14 , a plurality of conveying rollers 16 , a winding device 18 , a tension applying device 20 , and a control unit 22 .

[0027] In this embodiment, the number of the plurality of bobbin drive units 12 is four. The number of the plurality of bobbin drive units 12 can be set as appropriate. The plurality of bobbin drive units 12 includes a first bobbin drive unit 26, a second bobbin drive unit 28, a third bobbin drive unit 30, and a fourth bobbin drive unit 32. The first bobbin drive unit 26 includes a bobbin support shaft 34 and a bobbin motor 36. The bobbin motor 36 rotates the bobbin support unit. The structures of the second bobbin drive unit 28, the third bobbin drive unit 30, and the fourth bobbin drive unit 32 are the same as those of the first bobbin drive unit 26.

[0028] The FW device 10 can be attached to and detached from a plurality of bobbin members 400. In this embodiment, the number of the plurality of bobbin members 400 is four. The plurality of bobbin members 400 includes a first bobbin member 402, a second bobbin member 404, a third bobbin member 406, and a fourth bobbin member 408.

[0029] The first spool member 402 includes a spool 410 and a fiber winding portion 412. The spool 410 is mounted on the spool support shaft 34. A fiber bundle is wound around the spool 410 in a traversing manner. In other words, the fiber bundle is wound around the spool 410 while being moved in the width direction of the spool 410 (the axial direction of the spool 410).

[0030] A fiber bundle is formed by bundling multiple fibers. Carbon fibers or glass fibers are used as the fibers forming the fiber bundle. The fiber bundle is pre-impregnated with resin. For example, epoxy resin, a thermosetting resin, is used as the resin impregnated into the fiber bundle. In other words, the fiber bundle is a so-called prepreg. The fiber roll 412 is formed by winding the fiber bundle around the bobbin 410. The fiber bundle is discharged from the fiber roll 412 as the bobbin 410 rotates.

[0031] The second bobbin member 404, the third bobbin member 406, and the fourth bobbin member 408 are each configured similarly to the first bobbin member 402. Therefore, description of the respective configurations of the second bobbin member 404, the third bobbin member 406, and the fourth bobbin member 408 will be omitted.

[0032] Hereinafter, the portion of the fiber bundle of the first spool member 402 that is delivered from the fiber coil 412 is referred to as the "first delivered fiber portion 422." The portion of the fiber bundle of the second spool member 404 that is delivered from the fiber coil 412 is referred to as the "second delivered fiber portion 424." The portion of the fiber bundle of the third spool member 406 that is delivered from the fiber coil 412 is referred to as the "third delivered fiber portion 426." The portion of the fiber bundle of the fourth spool member 408 that is delivered from the fiber coil 412 is referred to as the "fourth delivered fiber portion 428." Furthermore, the first delivered fiber portion 422, the second delivered fiber portion 424, the third delivered fiber portion 426, and the fourth delivered fiber portion 428 are sometimes referred to as "delivered fiber portions 430," respectively.

[0033] In this embodiment, the number of the plurality of tension maintaining units 14 is four. The number of the plurality of tension maintaining units 14 is the same as the number of the plurality of bobbin drive units 12. The number of the plurality of tension maintaining units 14 can be appropriately set in the same manner as the plurality of bobbin drive units 12. The plurality of tension maintaining units 14 includes a first tension maintaining unit 42, a second tension maintaining unit 44, a third tension maintaining unit 46, and a fourth tension maintaining unit 48. The first tension maintaining unit 42 absorbs fluctuations in the tension acting on the first feed fiber unit 422. In other words, the first tension maintaining unit 42 maintains the tension acting on the first feed fiber unit 422 within a reference tension range.

[0034] like Figure 4A As shown, the first tension maintaining unit 42 includes a base 50, a first holding roller 52, a second holding roller 54, and an air cylinder 56. The base 50 has a rectangular shape. The base 50 includes a first end 51 and a second end 53. The first end 51 is one end of the base 50 in the longitudinal direction. The second end 53 is the other end of the base 50 in the longitudinal direction. The first holding roller 52 is rotatably mounted on the first end 51. The second holding roller 54 is rotatably mounted on the second end 53. The first feed fiber unit 422 is wound around the first holding roller 52 and the second holding roller 54.

[0035] The base 50 can be tilted around the tilt axis 58. The tilt axis 58 is located between the first holding roller 52 and the second holding roller 54. The base 50 can be tilted in the first rotation direction (arrow X direction) and the second rotation direction (arrow Y direction) around the tilt axis 58. The cylinder 56 applies force to the second end portion 53 in the first rotation direction. The second holding roller 54 is positioned in a state where the reference tension acts on the first feed fiber portion 422. Figure 4A At this time, the reference tension acting on the first fiber delivery portion 422 and the force acting on the cylinder 56 are balanced with each other.

[0036] like Figure 4BAs shown, when the tension acting on the first feed fiber portion 422 is less than the reference tension, the base portion 50 is pushed by the force of the air cylinder 56 and tilts about the tilt axis 58 in the first rotational direction. This causes the second holding roller 54 to move from the reference position to the first position. This increases the path length of the first feed fiber portion 422, increasing the tension acting on the first feed fiber portion 422. In other words, the tension acting on the first feed fiber portion 422 is maintained above the lower limit of the reference tension range.

[0037] like Figure 4C As shown, when the tension acting on the first feed fiber section 422 exceeds the reference tension, the base section 50 tilts in the second rotational direction about the tilt axis 58 while the tension of the first feed fiber section 422 presses the air cylinder 56. This causes the second holding roller 54 to move from the reference position to the second position. This shortens the path length of the first feed fiber section 422, reducing the tension acting on the first feed fiber section 422. In other words, the tension acting on the first feed fiber section 422 is maintained below the upper limit of the reference tension range. The first tension maintaining section 42 may also include a hydraulic cylinder or a spring member in place of the air cylinder 56.

[0038] The second tension maintaining portion 44 maintains the tension acting on the second extended fiber bundle within a reference tension range. The third tension maintaining portion 46 maintains the tension acting on the third extended fiber bundle within a reference tension range. The fourth tension maintaining portion 48 maintains the tension acting on the fourth extended fiber bundle within a reference tension range. The second tension maintaining portion 44, the third tension maintaining portion 46, and the fourth tension maintaining portion 48 are each configured similarly to the first tension maintaining portion 42. Therefore, the description of the respective structures of the second tension maintaining portion 44, the third tension maintaining portion 46, and the fourth tension maintaining portion 48 will be omitted.

[0039] Each tension maintaining portion 14 is not limited to the above-described configuration, and may adopt an appropriate configuration.

[0040] like Figure 1 As shown, the plurality of feed rollers 16 feed the plurality of feed fiber portions 430 passed through the plurality of tension maintaining units 14 to the winding device 18. Each feed roller 16 is rotatably mounted on a roller support member (not shown). A first feed fiber portion 422, a second feed fiber portion 424, a third feed fiber portion 426, and a fourth feed fiber portion 428 are wound around each feed roller 16.

[0041] The plurality of transport rollers 16 include a first transport roller 64, a second transport roller 66, a third transport roller 68, a fourth transport roller 70, a fifth transport roller 72, a sixth transport roller 74, and a seventh transport roller 76. The first transport roller 64, the second transport roller 66, the third transport roller 68, the fourth transport roller 70, the fifth transport roller 72, the sixth transport roller 74, and the seventh transport roller 76 are arranged in this order in the transport direction for feeding out the plurality of fiber portions 430. The number of the plurality of transport rollers 16 can be changed as appropriate.

[0042] The winding device 18 winds the plurality of feed fiber portions 430 onto the outer surface of the workpiece 500 while rotating the workpiece 500 about the axis Ax of the workpiece 500. The winding device 18 includes a first support table 78, a first support shaft 80, a second support table 82, a second support shaft 84, a rotation motor 86, and a fiber supply head 88.

[0043] The first support base 78 rotatably supports the first support shaft 80. The first support shaft 80 can be attached to and detached from the first interface 506 of the workpiece 500. The second support base 82 rotatably supports the second support shaft 84. The second support shaft 84 can be attached to and detached from the second interface 508 of the workpiece 500. The rotary motor 86 rotates the second support shaft 84. The rotary motor 86 is fixed to the second support base 82. The rotary motor 86 rotates the first support shaft 80, the workpiece 500, and the second support shaft 84 integrally about the axis Ax of the workpiece 500.

[0044] Hereinafter, the direction along the axis Ax of the workpiece 500 will be referred to as the "axial direction of the workpiece 500." The fiber supply head 88 supplies the plurality of feed fiber portions 430 to the workpiece 500 in a bundled state. The fiber supply head 88 is movable along the axial direction of the workpiece 500. The fiber supply head 88 has a through hole 90 through which the plurality of feed fiber portions 430 are inserted. The winding device 18 winds the plurality of feed fiber portions 430 onto the workpiece 500 in multiple layers by helical winding, hoop winding, or the like.

[0045] The tension applying device 20 is provided on the feeding path of the plurality of fed fiber portions 430 from the plurality of bobbin driving units 12 to the winding device 18. The tension applying device 20 applies tension to the plurality of fed fiber portions 430. The tension applying device 20 includes a pressing portion 92, a pressing support portion 94, and an actuator 96.

[0046] The pressing portion 92 is a roller extending horizontally. It presses each fiber delivery portion 430 downward (in the direction of gravity). Specifically, the pressing portion 92 presses the portion of each fiber delivery portion 430 located between the second and third conveyor rollers 66, 68. The portion of each fiber delivery portion 430 pressed by the pressing portion 92 can be modified as appropriate. Specifically, the pressing portion 92 may press the portion of each fiber delivery portion 430 located between the first and second conveyor rollers 64, 66.

[0047] The pressing support 94 rotatably supports the pressing portion 92. The pressing support 94 extends in the vertical direction. The actuator 96 moves the pressing support 94 in the vertical direction. Although not shown in detail, the actuator 96 includes, for example, a motor and a ball screw. However, the actuator 96 may also be an air cylinder, etc.

[0048] like Figure 5 As shown, the FW device 10 includes a speed sensor 98 and a load sensor 100. The speed sensor 98 detects the feed speed of each fiber feed portion 430. The speed sensor 98 transmits the detected feed speed to the control unit 22. The load sensor 100 detects the total load applied to the pressing portion 92 by each fiber feed portion 430. The load sensor 100 transmits the detected load to the control unit 22.

[0049] The control unit 22 includes a calculation unit 102 (processing unit) and a storage unit 104. The calculation unit 102 is composed of a processor (processing circuit) such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit).

[0050] The operation unit 102 includes a bobbin control unit 106, a winding control unit 108, a winding position acquisition unit 110, a winding position determination unit 112, and a tension control unit 114. The operation unit 102 implements the bobbin control unit 106, the winding control unit 108, the winding position acquisition unit 110, the winding position determination unit 112, and the tension control unit 114 by executing a program stored in the storage unit 104.

[0051] Furthermore, the computing unit 102 may implement at least a portion of the bobbin control unit 106, the winding control unit 108, the winding position acquisition unit 110, the winding position determination unit 112, and the tension control unit 114 using an integrated circuit. Examples of such integrated circuits include an ASIC (Application Specific Integrated Circuit) and an FPGA (Field-Programmable Gate Array).

[0052] The storage unit 104 includes volatile memory and non-volatile memory. Examples of volatile memory include RAM (Random Access Memory). Examples of non-volatile memory include ROM (Read Only Memory) and flash memory. Data, for example, is stored in the volatile memory. Programs, tables, and maps, for example, are stored in the non-volatile memory. At least a portion of the storage unit 104 may be incorporated into the processor or integrated circuit described above.

[0053] The bobbin control unit 106 controls the bobbin drive unit 12. The winding control unit 108 controls the winding device 18. Specifically, the winding control unit 108 controls the rotary motor 86 to rotate the workpiece 500. The winding control unit 108 controls the fiber supply head 88 to move the fiber supply head 88 along the axial direction of the workpiece 500. The winding control unit 108 synchronously controls the rotary motor 86 and the fiber supply head 88.

[0054] The winding position acquisition unit 110 acquires the winding position of each fed fiber portion 430 wound around the workpiece 500. The winding position acquisition unit 110 calculates the winding position of each fed fiber portion 430 wound around the workpiece 500 based on, for example, information about the workpiece 500 and the operation information of the winding device 18. The information about the workpiece 500 includes the shape and size of the workpiece 500. The operation information of the winding device 18 includes the rotation amount of the rotary motor 86 and the position information of the fiber supply head 88. Alternatively, the winding position acquisition unit 110 may use a camera or the like to acquire the winding position of each fed fiber portion 430 wound around the workpiece 500.

[0055] The winding position determination unit 112 determines whether the winding position of each feed fiber portion 430 around the workpiece 500 is in the tension reduction region. The tension reduction region is a winding position where the tension acting on each feed fiber portion 430 may fall below the lower limit of the reference tension range.

[0056] The winding position determination unit 112 also determines whether the winding position of each feed fiber portion 430 around the workpiece 500 is within a tension increase region. The tension increase region is a region where the tension acting on each feed fiber portion 430 may rise to a winding position higher than the upper limit of a predetermined tension range.

[0057] Furthermore, the winding position determination unit 112 determines whether the winding position of each feed fiber portion 430 around the workpiece 500 is at the midway stop position. The midway stop position is appropriately set according to the shape and size of the workpiece 500. In this embodiment, the midway stop position is set to the winding position of each feed fiber portion 430 around the workpiece 500 when one reinforcement layer 512 is formed. In other words, the winding position of each feed fiber portion 430 around the workpiece 500 is at the midway stop position each time one reinforcement layer 512 is formed.

[0058] Information on the tension drop region, tension increase region, and intermediate stop position is pre-stored in the storage unit 104. The tension drop region and tension increase region are obtained by, for example, pre-testing, etc. However, the tension drop region and tension increase region may also be calculated by simulation.

[0059] The tension control unit 114 controls the tension applying device 20. Specifically, the tension control unit 114 controls the actuator 96 to move the pressing unit 92 in the vertical direction.

[0060] Next, a filament winding method (hereinafter referred to as “FW method”) using the FW device 10 will be described.

[0061] like Figure 6 As shown, the FW method includes a preparation process (step S1). In the preparation process, a plurality of bobbin components 400 are respectively installed on a plurality of bobbin driving parts 12. In addition, each fiber delivery part 430 is wound on each conveying roller 16. Moreover, each fiber delivery part 430 is passed through the through hole 90 of the fiber supply head 88. In addition, the winding end portion (starting end portion) of each fiber delivery part 430 wound toward the workpiece 500 is fixed to the outer surface of the workpiece 500. In addition, as Figure 7A As shown, in the initial state before winding each feed fiber portion 430 onto the workpiece 500, each feed fiber portion 430 is wound on the pressing portion 92. In other words, in the initial state, the pressing portion 92 presses each feed fiber portion 430. As a result, a reference tension acts on each feed fiber portion 430.

[0062] Next, winding of the plurality of feed fiber portions 430 around the workpiece 500 begins (step S2). Specifically, the bobbin control unit 106 controls each bobbin drive unit 12 to rotate each bobbin motor 36. Furthermore, the winding control unit 108 controls the rotary motor 86 to rotate the workpiece 500. Furthermore, the winding control unit 108 controls the fiber supply head 88 to move the fiber supply head 88 in the axial direction of the workpiece 500.

[0063] In this manner, each feed fiber portion 430 is fed from each fiber roll portion of the plurality of fiber roll portions 412. Each feed fiber portion 430 is fed to the fiber supply head 88 via each tension maintaining portion 14 and the plurality of feed rollers 16. The plurality of feed fiber portions 430 fed to the fiber supply head 88 are bundled together and wound onto the outer surface of the workpiece 500. At this time, fluctuations in the tension of each feed fiber portion 430 are largely absorbed by each tension maintaining portion 14. Therefore, tension within the reference tension range is continuously applied to each feed fiber portion 430.

[0064] When the winding of the plurality of feed fiber portions 430 onto the workpiece 500 begins, the winding position acquisition unit 110 acquires the winding position of each feed fiber portion 430 onto the workpiece 500 (step S3). Next, the winding position determination unit 112 determines whether the acquired winding position is within the tension reduction region (step S4). If the winding position is within the tension reduction region, the tension maintaining units 14 alone cannot absorb the decrease in tension acting on each feed fiber portion 430. In other words, in this case, the tension acting on each feed fiber portion 430 may fall below the lower limit of the reference tension range. Therefore, if the winding position is within the tension reduction region (step S4: Yes), the tension control unit 114 performs tension increase control (step S5).

[0065] like Figure 7B As shown, in the tension increase control, the tension control unit 114 controls the actuator 96 to move the pressing unit 92 downward (in the direction of gravity). As a result, each of the feed fiber portions 430 pressed by the pressing unit 92 is stretched, and thus the tension acting on each of the feed fiber portions 430 increases. Therefore, the tension acting on each of the feed fiber portions 430 is maintained within the reference tension range. After the tension increase control, the operation flow enters step S8 described later (see Figure 6 ).

[0066] exist Figure 6 If the winding position is not in the tension-decreasing region (step S4: No), the winding position determination unit 112 determines whether the acquired winding position is in the tension-increasing region (step S6). If the winding position is in the tension-increasing region, the tension maintaining units 14 alone cannot absorb the increase in tension acting on the feed-fiber portions 430. In other words, in this case, the tension acting on the feed-fiber portions 430 may increase to a value higher than the upper limit of the reference tension range. Therefore, if the winding position is in the tension-increasing region (step S6: Yes), the tension control unit 114 performs tension reduction control (step S7).

[0067] like Figure 7CAs shown, in the tension reduction control, the tension control unit 114 controls the actuator 96 to move the pressing unit 92 upward (in the direction opposite to the direction of gravity). As a result, the pressing force from the pressing unit 92 on each fiber delivery unit 430 decreases, and thus the tension acting on each fiber delivery unit 430 decreases. Therefore, the tension acting on each fiber delivery unit 430 is maintained within the reference tension range. After the tension reduction control, the operation flow enters step S8 described later (refer to Figure 6 ).

[0068] exist Figure 6 If the winding position is not in the tension increasing region (step S6: No), the control unit 22 determines whether the winding of each feed-out fiber portion 430 around the workpiece 500 has been completed (step S8). If the winding of each feed-out fiber portion 430 around the workpiece 500 has not been completed (step S8: No), the winding position determination unit 112 determines whether the winding position of each feed-out fiber portion 430 around the workpiece 500 is at an intermediate stop position (step S9).

[0069] In this embodiment, when a single reinforcement layer 512 is formed from a plurality of feed fiber portions 430, the winding position of each feed fiber portion 430 around the workpiece 500 is at an intermediate stop position. That is, the winding position of each feed fiber portion 430 around the workpiece 500 is at an intermediate stop position each time each reinforcement layer 512 is formed. If the winding position of each feed fiber portion 430 around the workpiece 500 is at an intermediate stop position (step S9: Yes), an intermediate stop process is performed (step S10).

[0070] like Figure 8 As shown, in the midway stop process, the winding control unit 108 controls the winding device 18 to stop the operation of the winding device 18 (step S11). Specifically, the winding control unit 108 controls the rotary motor 86 to stop the rotation of the workpiece 500. In addition, the winding control unit 108 controls the fiber supply head 88 to stop the movement of the fiber supply head 88.

[0071] At this point, an intermediate process is performed (step S12). During the intermediate process, the winding accuracy of each feed fiber portion 430 around the workpiece 500 is measured. In other words, during the intermediate process, the stacking accuracy of each reinforcement layer 512 is measured. Furthermore, the winding angle of each feed fiber portion 430 around the workpiece 500 can also be set during the intermediate process.

[0072] Furthermore, the bobbin control unit 106 controls each bobbin motor 36 to reduce the feed speed of each fiber feed portion 430 (step S13). In other words, the bobbin control unit 106 controls each bobbin motor 36 to reduce the feed speed of each fiber feed portion 430 to a speed lower than the feed speed of each fiber feed portion 430 immediately before the midway stop process. Furthermore, the tension control unit 114 controls the actuator 96 to move the pressing portion 92 downward (in the direction of gravity) at the first movement speed (step S14).

[0073] Specifically, the tension control unit 114 controls the first moving speed based on the feed speed of each feed fiber portion 430 detected by the speed sensor 98, thereby maintaining the tension of each feed fiber portion 430 within a reference tension range. In other words, the faster the feed speed of each feed fiber portion 430 detected by the speed sensor 98, the faster the tension control unit 114 increases the first moving speed, thereby maintaining the tension of each feed fiber portion 430 within the reference tension range. When this control is performed, the load sensor 100 can be omitted.

[0074] The tension control unit 114 may also control the first moving speed based on the load detected by the load sensor 100 to maintain the tension of each feed-out fiber portion 430 within a reference tension range. In other words, the tension control unit 114 may control the first moving speed to be slower as the load detected by the load sensor 100 increases, thereby maintaining the tension of each feed-out fiber portion 430 within the reference tension range. When this type of control is implemented, the speed sensor 98 may be omitted.

[0075] When the pressing portion 92 is moved downward at the first moving speed, Figure 7B As shown, the length of the feeding path of each feed fiber portion 430 becomes longer in a state where appropriate tension acts on each feed fiber portion 430 .

[0076] During this halfway stop process, the feed-out fiber portions 430 continue to be fed out from the fiber roll portions 412. In other words, the feed-out fiber portions 430 are not stopped from being fed out from the fiber roll portions 412. Therefore, the fiber roll portions 412 are not excessively tightened by the feed-out fiber portions 430.

[0077] Furthermore, since each fiber roll 412 rotates, the resin impregnated with the fiber bundles forming each fiber roll 412 is prevented from sagging in the direction of gravity (segregation). This prevents uneven distribution of the resin impregnated within the fiber bundles. Consequently, it prevents the feed fiber portions 430 wound around the workpiece 500 from developing portions with insufficient strength.

[0078] Furthermore, during the mid-stop process, appropriate tension is continuously applied to each feed fiber portion 430. In other words, during the mid-stop process, the tension of each feed fiber portion 430 is maintained within a reference tension range. This prevents the feed fiber portion 430 wound around the workpiece 500 from loosening (deflecting).

[0079] After this, in Figure 8 When the intermediate processing is completed (step S15), the midway stop process is completed. Figure 6 As shown, the winding process is restarted (step S16).

[0080] like Figure 9 As shown, in the restart winding process, the winding control unit 108 controls the winding device 18 to restart the operation of the winding device 18 (step S17). Specifically, the winding control unit 108 controls the rotary motor 86 to rotate the workpiece 500. Furthermore, the winding control unit 108 controls the fiber supply head 88 to move the fiber supply head 88 in the axial direction of the workpiece 500. The winding acceleration of each delivered fiber portion 430 wound onto the workpiece 500 during the restart winding process is greater than the winding acceleration of each delivered fiber portion 430 wound onto the workpiece 500 during the restart winding process.

[0081] Furthermore, the tension control unit 114 controls the actuator 96 to return the pressing portion 92 to its initial position at the second moving speed (step S18). At this time, the tension control unit 114 controls the second moving speed based on the winding speed of each fed fiber portion 430 wound onto the workpiece 500 during the restarted winding process. The second moving speed is faster than the first moving speed.

[0082] Then, the bobbin control unit 106 controls each bobbin motor 36 to gradually increase the delivery speed of each fiber delivery unit 430 (step S19). At this time, the bobbin control unit 106 controls the delivery speed of each fiber delivery unit 430 according to the second moving speed so that the tension of each fiber delivery unit 430 is maintained within the reference tension range. Figure 7C As shown, the length of the conveying path of each fiber delivery portion 430 becomes shorter when appropriate tension is applied to each fiber delivery portion 430. When the pressing portion 92 returns to the initial position, the winding process is restarted and completed. After the winding process is restarted, the winding process is completed. Figure 6 The processing after step S3.

[0083] exist Figure 6When the winding of each feed fiber portion 430 onto the workpiece 500 is complete (step S8: Yes), the control unit 22 stops the operation of the FW device 10 (step S20). Specifically, the winding control unit 108 controls the rotation motor 86 to stop the rotation of the workpiece 500. Furthermore, the winding control unit 108 controls the fiber supply head 88 to stop its operation. Furthermore, the bobbin control unit 106 controls each bobbin motor 36 to stop the feeding of each feed fiber portion 430. This completes the FW method operation flow.

[0084] The workpiece 500 (semi-finished product) wound with the fiber bundle by the FW method is removed from the winding device 18 and heated. As a result, the resin impregnated in the fiber bundle solidifies to form the reinforcement layer 512. That is, the high-pressure gas tank 502 having the reinforcement portion 510 is manufactured.

[0085] This embodiment achieves the following effects.

[0086] The FW method includes an intermediate stop step in which the operation of the winding device 18 is stopped midway while each feed fiber portion 430 is being wound onto the workpiece 500. In the intermediate stop step, while the feed fiber portions 430 continue to be fed from the fiber rolls 412, the pressing portion 92 is moved while pressing against each feed fiber portion 430, thereby lengthening the feed path.

[0087] The FW device 10 also includes a bobbin control unit 106, a winding control unit 108, and a tension control unit 114. The winding control unit 108 controls the winding device 18 to stop the operation of the winding device 18 while winding each feed fiber portion 430 onto the workpiece 500. When the winding control unit 108 stops the operation of the winding device 18, the bobbin control unit 106 controls the bobbin drive unit 12 to continue feeding each feed fiber portion 430 from each fiber winding unit 412. Furthermore, when the operation stops, the tension control unit 114 controls the tension applying device 20 to move the pressing unit 92 while pressing it against each feed fiber portion 430, thereby increasing the length of the feed path.

[0088] According to this method and structure, the delivered fiber portions 430 continue to be delivered from the fiber rolls 412 during the mid-stop process. Thus, during the mid-stop process, the fiber rolls 412 are not excessively tightened by the delivered fiber portions 430, thereby suppressing deformation of the fiber rolls 412. Consequently, it is possible to avoid the need to correct multiple fiber rolls 412 or replace multiple spool members 400. Consequently, it is possible to suppress the time required for fiber winding and the increase in fiber winding costs.

[0089] Furthermore, since the pressing portion 92 is moved in the midway stopping step to lengthen the feeding path, appropriate tension can be continuously applied to each feed fiber portion 430. This prevents each feed fiber portion 430 wound around the workpiece 500 from becoming loose.

[0090] In the midway stop process, the pressing direction of the pressing portion 92 on each feed-out fiber portion 430 is the direction of gravity. In this case, the load acting on the pressing portion 92 can be effectively reduced.

[0091] During the mid-stop process, the faster the feed speed of each delivered fiber portion 430 from each fiber roll portion 412, the faster the movement speed of the pressing portion 92. In other words, the FW device 10 includes a speed sensor 98 that detects the feed speed of each delivered fiber portion 430 from each fiber roll portion 412. During the mid-stop process, the tension control unit 114 controls the tension applying device 20 to increase the movement speed of the pressing portion 92 as the feed speed detected by the speed sensor 98 increases.

[0092] According to such a method or structure, fluctuations in the tension acting on each feed-out fiber portion 430 during the halfway stopping step can be effectively suppressed.

[0093] During the mid-stop process, the greater the load applied to the pressing section 92 by the fiber feed sections 430, the slower the moving speed of the pressing section 92. In other words, the FW device 10 includes a load sensor 100 that detects the load applied to the pressing section 92 by the fiber feed sections 430. During the mid-stop process, the tension control unit 114 controls the tension applying device 20 to slow the moving speed of the pressing section 92 as the load detected by the load sensor 100 increases.

[0094] According to such a method or structure, fluctuations in the tension acting on each feed-out fiber portion 430 during the halfway stopping step can be effectively suppressed.

[0095] The feeding speed of each fed fiber portion 430 during the midway stop process is slower than the feeding speed of each fed fiber portion 430 immediately before the midway stop process. In other words, during the midway stop process, the bobbin control unit 106 controls each bobbin driving unit 12 so that the feeding speed of each fed fiber portion 430 is slower than the feeding speed of each fed fiber portion 430 immediately before the midway stop process.

[0096] According to such a method or configuration, it is possible to prevent the conveyance path for feeding the fiber portion 430 from becoming excessively long in the midway stopping step.

[0097] The FW method includes a resuming winding step following the midway stop step. In this resuming winding step, the winding device 18 is operated to resume winding each of the feed fiber portions 430 onto the workpiece 500. In the resuming winding step, the pressing portion 92 is moved to its initial position while pressing against each of the feed fiber portions 430. In other words, after the operation of the winding device 18 is stopped midway, the winding control unit 108 controls the winding device 18 to resume winding each of the feed fiber portions 430 onto the workpiece 500. When resuming winding of each of the feed fiber portions 430 onto the workpiece 500, the tension control unit 114 controls the tension applying device 20 to press against each of the feed fiber portions 430 while moving the pressing portion 92 to its initial position.

[0098] According to such a method or structure, the pressing portion 92 can be returned to the initial position while applying appropriate tension to each feed-fiber portion 430 .

[0099] The moving speed of the pressing portion 92 during the restart of the winding process is faster than the moving speed of the pressing portion 92 during the midway stop process. In other words, when the winding of each fed fiber portion 430 around the workpiece 500 is restarted, the tension control portion 114 controls the tension applying device 20 so that the moving speed of the pressing portion 92 is faster than the moving speed of the pressing portion 92 during the midway stop process.

[0100] According to such a method or structure, each fed fiber portion 430 can be efficiently wound around the workpiece 500 when the winding process is restarted.

[0101] In the restart winding process, the feeding speed of each fed fiber portion 430 is gradually increased. In other words, when the winding of each fed fiber portion 430 onto the workpiece 500 is restarted, the bobbin control unit 106 controls the bobbin drive unit 12 to gradually increase the feeding speed of each fed fiber portion 430.

[0102] According to such a method or configuration, in the restart winding step, the load acting from each fed fiber portion 430 on each fiber roll portion 412 can be suppressed compared to a case where the feeding speed of each fed fiber portion 430 is suddenly increased.

[0103] The FW device 10 may also include a Figure 10 The tension applying device 150 according to the first modification is shown. In the first modification, the same reference numerals as those in the above embodiment denote the same configurations. In the first modification, descriptions of the same configurations as those in the above embodiment are omitted.

[0104] In the case of using the tension applying device 150, as Figure 10As shown, the plurality of conveyor rollers 16 further include a first intermediate roller 152 and a second intermediate roller 154. The first intermediate roller 152 is located between the second conveyor roller 66 and the third conveyor roller 68. The second intermediate roller 154 is located between the first intermediate roller 152 and the third conveyor roller 68. The second conveyor roller 66, the first intermediate roller 152, the second intermediate roller 154, and the third conveyor roller 68 are arranged in this order in the conveying direction of the plurality of delivered fiber portions 430. The second conveyor roller 66, the first intermediate roller 152, the second intermediate roller 154, and the third conveyor roller 68 are arranged in a row in the horizontal direction.

[0105] The tension applying device 150 includes a plurality of pressing portions 160, a pressing support portion 94, and an actuator 96. The number of pressing portions 160 is three. However, the number of pressing portions 160 may be two or four or more. Each pressing portion 160 is rotatably supported by the pressing support portion 94. Each pressing portion 160 is constructed similarly to the pressing portion 92 described above.

[0106] The plurality of pressing portions 160 include a first pressing portion 162, a second pressing portion 164, and a third pressing portion 166. The first pressing portion 162 presses downwardly the portion of each fiber delivery portion 430 located between the second feed roller 66 and the first intermediate roller 152. The second pressing portion 164 presses downwardly the portion of each fiber delivery portion 430 located between the first intermediate roller 152 and the second intermediate roller 154. The third pressing portion 166 presses downwardly the portion of each fiber delivery portion 430 located between the second intermediate roller 154 and the third feed roller 68.

[0107] The tension applying device 150 according to the first modified example can achieve the same effects as those of the above-described tension applying device 20. In addition, the FW device 10 including the tension applying device 150 achieves the following effects.

[0108] The FW device 10 includes a plurality of conveying rollers 16 that convey each delivered fiber portion 430 from the bobbin drive unit 12 to the winding device 18. A plurality of pressing units 160 are provided. At least one of the plurality of conveying rollers 16 is disposed between adjacent pressing units 160 on the conveying path.

[0109] According to such a configuration, it is possible to increase the maximum extension amount of the path of each fiber feed portion 430 while suppressing an increase in size of the FW device 10 .

[0110] The FW device 10 may also include a Figure 11 The tension applying device 170 according to the second modification is shown. In the second modification, the same reference numerals as those in the first modification denote the same configuration. In the second modification, the description of the configurations identical to those in the first modification will be omitted.

[0111] like Figure 11 As shown, the tension applying device 170 includes a plurality of pressing parts 160, a plurality of pressing support parts 172, and an actuator 96. The number of the plurality of pressing support parts 172 is the same as the number of the plurality of pressing parts 160. That is, the number of the plurality of pressing support parts 172 is three. The number of the plurality of pressing parts 160 is three. The number of the plurality of pressing support parts 172 and the number of the plurality of pressing parts 160 can each be two or four or more.

[0112] The plurality of pressing support portions 172 include a first pressing support portion 174, a second pressing support portion 176, and a third pressing support portion 178. The first pressing portion 162 is rotatably supported on the first pressing support portion 174. The second pressing portion 164 is rotatably supported on the second pressing support portion 176. The third pressing portion 166 is rotatably supported on the third pressing support portion 178. The actuator 96 independently displaces the first pressing support portion 174, the second pressing support portion 176, and the third pressing support portion 178 in the vertical direction.

[0113] The tension applying device 170 according to the second modification achieves the same effects as the tension applying device 20 described above. Furthermore, the tension applying device 170 according to the second modification achieves the same effects as the tension applying device 150 according to the first modification. Furthermore, the tension applying device 170, compared to the tension applying device 150, can finely adjust the length of the path of each fiber portion 430 fed out during the midway stop process.

[0114] In the FW method using the FW device 10 described above, the fiber bundle may not be impregnated with resin in advance. In this case, the FW device 10 may include an impregnation device on the path where the fiber portion 430 is fed out, and the impregnation device is used to impregnate the fiber bundle with resin.

[0115] In addition, the present invention is not limited to the above-described embodiment, and various structures can be adopted without departing from the gist of the present invention.

[0116] The above embodiments are summarized as follows.

[0117] The above embodiment discloses a fiber winding method, which is a fiber winding method using a fiber winding device (10), wherein the fiber winding device has a bobbin driving unit (12), a winding device (18) and a tension applying device (20), wherein the bobbin driving unit is used to rotate a bobbin component (400) having a bobbin (410) and a fiber roll (412), wherein the fiber roll is formed by winding a fiber bundle on the bobbin; the winding device winds a delivered fiber portion (430) delivered from the fiber roll portion onto a workpiece (500) while applying tension to the delivered fiber portion; the tension The applying device is arranged on the conveying path of the delivered fiber portion from the bobbin driving portion to the winding device, the tension applying device has a pressing portion (92, 160) for pressing the delivered fiber portion, and the fiber winding method includes an intermediate stop process, which is a process of stopping the action of the winding device in the middle of winding the delivered fiber portion onto the workpiece. In the intermediate stop process, while continuing to feed the delivered fiber portion from the fiber winding portion, the pressing portion is pressed against the delivered fiber portion and moved, thereby lengthening the length of the conveying path.

[0118] In the filament winding method, in the midway stopping step, the pressing portion may press the feed-out fiber portion in a direction corresponding to gravity.

[0119] In the fiber winding method, in the midway stopping step, the moving speed of the pressing portion may be increased as the feeding speed of the delivered fiber portion from the fiber roll portion is increased.

[0120] In the filament winding method, in the midway stopping step, the greater the load received by the pressing portion from the fiber feed portion, the slower the moving speed of the pressing portion.

[0121] In the fiber winding method, a feeding speed of the feed fiber portion from the fiber roll portion in the midway stopping step may be slower than a feeding speed of the feed fiber portion from the fiber roll portion immediately before the midway stopping step.

[0122] In the fiber winding method, it may include a restart winding process located after the midway stopping process, and the restart winding process is a process of operating the winding device to restart winding the delivered fiber portion onto the workpiece. In the restart winding process, the pressing portion is moved to the initial position while pressing the pressing portion on the delivered fiber portion.

[0123] In the filament winding method, a moving speed of the pressing portion in the winding resumption step may be faster than a moving speed of the pressing portion in the winding stop step.

[0124] In the fiber winding method, in the restart winding step, a feeding speed of the fed fiber portion fed from the fiber winding portion may be gradually increased.

[0125] The above embodiment discloses a fiber winding device, which has a bobbin driving unit, a winding device and a tension applying device, wherein the bobbin driving unit is used to rotate a bobbin component having a bobbin and a fiber roll portion, and the fiber roll portion is formed by winding a fiber bundle on the bobbin; the winding device winds the delivered fiber portion sent out from the fiber roll portion onto a workpiece while applying tension to the delivered fiber portion; the tension applying device is arranged on the conveying path of the delivered fiber portion from the bobbin driving unit to the winding device, the tension applying device has a pressing unit for pressing the delivered fiber portion, and the fiber winding device has a bobbin control unit (106), a winding control unit ( 108) and a tension control unit (114), wherein the bobbin control unit controls the bobbin driving unit; the winding control unit controls the winding device; the tension control unit controls the tension applying device, the winding control unit controls the winding device to stop the operation of the winding device in the middle of winding the delivered fiber portion onto the workpiece, when the winding control unit stops the operation of the winding device in the middle, the bobbin control unit controls the bobbin driving unit to continue to deliver the delivered fiber portion from the fiber winding unit, and the tension control unit controls the tension applying device to press the pressing unit against the delivered fiber portion while moving the pressing unit, thereby lengthening the conveying path.

[0126] In the filament winding device, a direction in which the pressing portion presses the feed-out fiber portion during the intermediate stop may be a direction of gravity.

[0127] In the fiber winding device, there may be a speed sensor (98) that detects the conveying speed of the fiber part delivered from the fiber roll part. When the fiber is stopped midway, the tension control part controls the tension applying device. The faster the conveying speed detected by the speed sensor, the faster the moving speed of the pressing part.

[0128] The fiber winding device may include a load sensor (100) for detecting the load exerted on the pressing portion by the fiber delivery portion. When the fiber is stopped midway, the tension control portion controls the tension applying device. The greater the load detected by the load sensor, the slower the moving speed of the pressing portion.

[0129] In the fiber winding device, during the midway stop, the bobbin control unit may control the bobbin drive unit to make the delivery speed of the delivered fiber portion from the fiber roll unit slower than the delivery speed of the delivered fiber portion from the fiber roll unit immediately before the midway stop.

[0130] In the fiber winding device, the winding control unit may control the winding device to restart winding the delivered fiber portion onto the workpiece after stopping the operation of the winding device midway. When restarting winding the delivered fiber portion onto the workpiece, the tension control unit may control the tension applying device to press the pressing unit onto the delivered fiber portion while moving the pressing unit to an initial position.

[0131] In the filament winding device, when winding the delivered fiber portion onto the workpiece is restarted, the tension control unit may control the tension applying unit so that the pressing portion moves faster than the pressing portion when the winding is stopped.

[0132] In the filament winding device, when winding of the feed fiber portion onto the workpiece is restarted, the bobbin control unit may control the bobbin drive unit to gradually increase a feeding speed of the feed fiber portion from the fiber winding unit.

[0133] In the fiber winding device, there may be a plurality of conveying rollers (16), which convey the delivered fiber portion from the bobbin driving portion to the winding device, and a plurality of pressing portions are provided, and at least one of the plurality of conveying rollers is arranged between the pressing portions adjacent to each other on the conveying path.

Claims

1. A fiber winding method using a fiber winding device (10), characterized in that: The fiber winding device comprises a bobbin driving portion (12), a winding device (18) and a tension applying device (20), wherein: The bobbin driving portion is used to rotate a bobbin component (400) having a bobbin (410) and a fiber roll portion (412), wherein the fiber roll portion is formed by winding a fiber bundle on the bobbin; The winding device winds the delivered fiber portion (430) delivered from the fiber winding portion around a workpiece (500) while applying tension to the delivered fiber portion; The tension applying device is provided on a conveying path of the delivered fiber portion from the bobbin driving unit to the winding device. The tension applying device includes a pressing portion (92, 160) for pressing the fiber delivery portion. The fiber winding method includes a midway stopping step of stopping the operation of the winding device midway through winding the fed fiber portion onto the workpiece. In the midway stopping step, while the delivered fiber portion is continuously delivered from the fiber roll portion, the pressing portion is moved while pressing the pressing portion against the delivered fiber portion, thereby lengthening the feeding path. In the midway stopping step, the fiber delivery portion is connected to the workpiece from the fiber winding portion. In the midway stopping step, the faster the feeding speed of the delivered fiber portion from the fiber roll portion is, the faster the moving speed of the pressing portion is.

2. The filament winding method according to claim 1, wherein: In the midway stopping step, the pressing portion presses the feed-fiber portion in a direction of gravity.

3. A fiber winding method using a fiber winding device (10), characterized in that: The fiber winding device comprises a bobbin driving portion (12), a winding device (18) and a tension applying device (20), wherein: The bobbin driving portion is used to rotate a bobbin component (400) having a bobbin (410) and a fiber roll portion (412), wherein the fiber roll portion is formed by winding a fiber bundle on the bobbin; The winding device winds the delivered fiber portion (430) delivered from the fiber winding portion around a workpiece (500) while applying tension to the delivered fiber portion; The tension applying device is provided on a conveying path of the delivered fiber portion from the bobbin driving unit to the winding device. The tension applying device includes a pressing portion (92, 160) for pressing the fiber delivery portion. The fiber winding method includes a midway stopping step of stopping the operation of the winding device midway through winding the fed fiber portion onto the workpiece. In the midway stopping step, while the delivered fiber portion is continuously delivered from the fiber roll portion, the pressing portion is moved while pressing the pressing portion against the delivered fiber portion, thereby lengthening the feeding path. In the midway stopping step, the fiber delivery portion is connected to the workpiece from the fiber winding portion. In the midway stopping step, the greater the load received by the pressing portion from the fiber feeding portion, the slower the moving speed of the pressing portion.

4. The fiber winding method according to claim 1 or 2, characterized in that: The feeding speed of the feed fiber portion fed out of the fiber roll portion in the midway stopping step is slower than the feeding speed of the feed fiber portion fed out of the fiber roll portion immediately before the midway stopping step.

5. The filament winding method according to any one of claims 1 to 3, characterized in that: The method further comprises a resuming winding step after the midway stopping step, wherein the resuming winding step is a step of operating the winding device to resuming winding of the delivered fiber portion onto the workpiece. In the restart winding step, the pressing portion is moved to an initial position while pressing the pressing portion against the feed-out fiber portion.

6. The filament winding method according to claim 5, characterized in that: The moving speed of the pressing portion in the resuming winding step is faster than the moving speed of the pressing portion in the stopping step.

7. The filament winding method according to claim 6, characterized in that: In the restart winding step, a feeding speed of the delivered fiber portion from the fiber roll portion is gradually increased.

8. A fiber winding device comprising a bobbin drive unit, a winding device, a tension applying device and a speed sensor (98), wherein: The bobbin driving unit is used to rotate a bobbin member having a bobbin and a fiber roll portion, wherein the fiber roll portion is formed by winding a fiber bundle around the bobbin; The winding device winds the delivered fiber portion delivered from the fiber winding portion around the workpiece while applying tension to the delivered fiber portion; The tension applying device is provided on a conveying path of the delivered fiber portion from the bobbin driving unit to the winding device. The speed sensor detects a feeding speed of the delivered fiber portion delivered from the fiber roll portion. The tension applying device includes a pressing portion for pressing the fiber feeding portion. The fiber winding device is characterized in that It has a bobbin control unit (106), a winding control unit (108) and a tension control unit (114), wherein: The bobbin control unit controls the bobbin driving unit; The winding control unit controls the winding device; The tension control unit controls the tension applying device, The winding control unit controls the winding device to stop the operation of the winding device in the middle of winding the fed fiber portion onto the workpiece. When the winding control unit stops the operation of the winding device midway, the bobbin control unit controls the bobbin driving unit to continue feeding the delivered fiber portion from the fiber winding unit, and the tension control unit controls the tension applying device to move the pressing unit while pressing the pressing unit against the delivered fiber portion, thereby lengthening the feeding path. During the midway stop, the fiber delivery portion is connected to the workpiece from the fiber roll portion. During the midway stop, the tension control unit controls the tension applying device so that the faster the conveying speed detected by the speed sensor, the faster the moving speed of the pressing unit.

9. The fiber winding device according to claim 8, characterized in that The direction in which the pressing portion presses the fiber feed portion during the intermediate stop is the direction of gravity.

10. A fiber winding device comprising a bobbin drive unit, a winding device, a tension applying device and a load sensor (100), wherein: The bobbin driving unit is used to rotate a bobbin member having a bobbin and a fiber roll portion, wherein the fiber roll portion is formed by winding a fiber bundle around the bobbin; The winding device winds the delivered fiber portion delivered from the fiber winding portion around the workpiece while applying tension to the delivered fiber portion; The tension applying device is provided in a conveying path of the delivered fiber portion from the bobbin driving portion to the winding device, and includes a pressing portion for pressing the delivered fiber portion. The load sensor detects the load applied to the pressing portion from the fiber feeding portion. The fiber winding device is characterized in that It has a bobbin control unit (106), a winding control unit (108) and a tension control unit (114), wherein: The bobbin control unit controls the bobbin driving unit; The winding control unit controls the winding device; The tension control unit controls the tension applying device, The winding control unit controls the winding device to stop the operation of the winding device in the middle of winding the fed fiber portion onto the workpiece. When the winding control unit stops the operation of the winding device midway, the bobbin control unit controls the bobbin driving unit to continue feeding the delivered fiber portion from the fiber winding unit, and the tension control unit controls the tension applying device to move the pressing unit while pressing the pressing unit against the delivered fiber portion, thereby lengthening the feeding path. During the midway stop, the fiber delivery portion is connected to the workpiece from the fiber roll portion. During the midway stop, the tension control unit controls the tension applying device so that the larger the load detected by the load sensor, the slower the moving speed of the pressing unit.

11. The fiber winding device according to claim 8 or 9, characterized in that: During the midway stop, the bobbin control unit controls the bobbin drive unit to make the feeding speed of the feed fiber portion from the fiber roll portion slower than the feeding speed of the feed fiber portion from the fiber roll portion immediately before the midway stop.

12. The fiber winding device according to any one of claims 8 to 10, characterized in that: The winding control section controls the winding device to restart winding the fed fiber portion onto the workpiece after stopping the operation of the winding device midway. When the winding of the feed fiber portion around the workpiece is restarted, the tension control section controls the tension applying device to move the pressing section to an initial position while pressing the pressing section against the feed fiber portion.

13. The filament winding device according to claim 12, wherein: When the winding of the fed fiber portion around the workpiece is restarted, the tension control section controls the tension applying device so that the moving speed of the pressing section is faster than the moving speed of the pressing section when the winding is stopped.

14. The filament winding device according to claim 13, wherein: When the winding of the feed fiber portion onto the workpiece is restarted, the bobbin control unit controls the bobbin drive unit to gradually increase the feeding speed of the feed fiber portion from the fiber winding unit.

15. The fiber winding device according to any one of claims 8 to 10, characterized in that: A plurality of conveying rollers (16) are provided, wherein the plurality of conveying rollers convey the delivered fiber portion from the bobbin driving portion to the winding device, The pressing part is provided with a plurality of At least one of the plurality of conveying rollers is arranged between the pressing portions adjacent to each other on the conveying path.

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