JP2011127635A - Filament winding device and filament winding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for surely holding a tank container when a reinforced fiber is wound in a manufacturing process of a high-pressure gas tank by a filament winding method. <P>SOLUTION: A filament winding (FW) device 100 has a first rotary shaft 110 and a second rotary shaft 120. The FW device 100 holds the tank container 10 by sandwiching a container wall of the tank container 10 with mutually facing shaft-ends 111, 121 of the first and second rotary shafts 110, 120. The shaft-ends 111, 121 are provided with an electromagnetic force generating part 20 that generates an electromagnetic force to cause the shaft-ends 111, 121 closer. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a filament winding method used for manufacturing a high-pressure gas tank.

  As a method for producing a high-pressure gas tank, a filament winding method (hereinafter also referred to as “FW method”) is known. In the FW method, a reinforcing fiber impregnated with a thermosetting resin such as an epoxy resin is wound around the outer surface of a resin tank container. And the reinforcing fiber layer is formed by thermosetting the thermosetting resin contained in the reinforcing fiber, and the strength of the tank container is improved.

  By the way, in general, in the FW method, the tank container is rotatably held, and then the reinforcing fiber is wound while rotating the tank container (see Patent Document 1 below). However, in the process of winding the reinforcing fiber around the tank container, since the fiber tension applied to the reinforcing fiber changes or the weight of the tank container increases due to the wound reinforcing fiber, the load applied to the holding unit that holds the tank container Changes. Therefore, in the FW method, it is desirable to securely hold the tank container so that the tank container does not deviate from a predetermined position even when there is such a change in load.

JP 2004-257413 A

  An object of this invention is to provide the technique of hold | maintaining a tank container more reliably when winding a reinforcement fiber in the manufacturing process of the high pressure gas tank by FW method.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
A filament winding apparatus for winding reinforcing fibers around a tank container by a filament winding method, the tank container holding part for holding the tank container in a rotatable manner, and the rotation for rotating the tank container held by the tank container holding part. A driving unit; and a reinforcing fiber supply unit that wraps the reinforcing fiber around the outer periphery of the tank container by supplying the reinforcing fiber to the outer periphery of the rotating tank container, and the tank container holding unit includes the tank container A first rotating shaft that is inserted into the tank container from an opening provided at the first top of the tank and reaches the container wall of the second top of the tank container opposite to the first top; A second rotation disposed outside the tank container at a position opposite to the first rotation shaft across the container wall of the second top. The first rotation shaft is held in the first top portion in a state of being inserted into the tank container, and the first and second rotation shafts are opposed to each other. The tank container is held by holding the container wall of the second top portion by the first and second shaft end portions, and the first and second shaft end portions have the first and second shaft ends. A filament winding apparatus provided with an electromagnetic force generator that generates an electromagnetic force so that two shaft ends are brought together.
According to this filament winding apparatus, when the tank container is held by being held between the shaft ends of the first and second rotating shafts, the electromagnetic force generated by the electromagnetic force generating unit is added to the holding force. be able to. Therefore, the tank container can be reliably held so as not to be displaced from the predetermined mounting position.

[Application Example 2]
The filament winding apparatus according to Application Example 1, further including an electromagnetic force control unit that controls an electromagnetic force of the electromagnetic force generation unit, wherein the electromagnetic force control unit is configured to wind the reinforcing fiber around the tank container. The electromagnetic force is increased in accordance with the magnitude of fiber tension generated in the reinforcing fiber, and the holding force of the first and second rotating shafts against the container wall of the second top portion of the tank container is increased. Let the filament winding device.
According to this filament winding apparatus, even when the magnitude of the fiber tension changes and the load applied to the tank container holding portion changes, the holding force for holding the tank container can be appropriately controlled. Can do. Therefore, when winding the reinforcing fiber, the tank container can be more reliably held so as not to be displaced from the predetermined attachment position.

[Application Example 3]
The filament winding apparatus according to Application Example 2, wherein the filament winding apparatus includes a weight detection unit that detects a weight of the tank container held by the tank container holding unit, and the electromagnetic force control unit includes the reinforcing fiber. A filament winding apparatus that increases the electromagnetic force in accordance with an increase in the weight of the tank container when wound around the tank container.
According to this filament winding apparatus, even when the weight of the tank container increases and the load applied to the tank container holding portion increases, the holding force for holding the tank container is appropriately increased accordingly. Can be controlled. Therefore, when winding the reinforcing fiber, the tank container can be more reliably held so as not to be displaced from the predetermined attachment position.

[Application Example 4]
4. The filament winding apparatus according to any one of Application Examples 1 to 3, wherein the electromagnetic force generation unit has one of the first and second shaft end portions and the first magnetic pole is the container. An electromagnet embedded to be disposed on the wall side and the other of the first or second shaft end portions are embedded so as to face the first magnetic pole of the electromagnet, and by the electromagnetic force of the electromagnet An electromagnet facing member that is attracted, and on the outer periphery of the electromagnet facing member, the mounting of the tank container prevents the electromagnet from being displaced toward the outer periphery of the electromagnet facing member. A filament winding apparatus in which a magnet for generating a magnetic force repelling the first magnetic pole is disposed.
According to this filament winding apparatus, when the tank container is attached, the electromagnet attracts the electromagnet-facing member and the repulsive force between the electromagnet and the magnet causes the first and second shaft end portions to move. It can suppress that a mutual position deviates from a predetermined attachment position. Therefore, the tank container can be held more reliably.

[Application Example 5]
A filament winding method for winding reinforcing fibers around a tank container,
(A) The first rotating shaft is inserted into the tank container through an opening provided at the first top of the tank container, and the second of the tank container opposite to the first top is inserted. And holding the second rotating shaft outside the tank container with the container wall of the second top part sandwiched between the first top part and the first top part. By disposing the container wall at the second top portion by the first and second shaft end portions facing each other of the first and second rotation shafts, disposed at a position opposite to the rotation shaft, Holding the tank container rotatably;
(B) wrapping the reinforcing fiber around the outer periphery of the tank container by rotating the tank container and supplying the reinforcing fiber to the outer periphery of the rotating tank container;
With
The filament winding method, wherein the step (a) or (b) includes a step of generating an electromagnetic force so as to bring the first and second shaft end portions together.

  The present invention can be realized in various forms, for example, a filament winding apparatus and a filament winding method for winding reinforcing fibers around a tank container in order to manufacture a high-pressure gas tank, and functions of these apparatuses or methods. Can be realized in the form of a computer program for realizing the above, a recording medium on which the computer program is recorded, and the like.

The schematic sectional drawing which shows a tank container. The schematic diagram which shows the filament winding apparatus with which the tank container was attached. The schematic diagram for demonstrating the structure of an electromagnetic force generation | occurrence | production part. The schematic diagram which shows the tank container which winding of the reinforcement fiber was completed, and the schematic diagram for demonstrating the process performed with respect to a tank container after a tank container is removed from a filament winding apparatus as a 5th process. The schematic diagram for demonstrating the manufacturing process of the high pressure gas tank in a comparative example, and the filament winding apparatus in a comparative example. Schematic which shows the structure of the electromagnetic force generation | occurrence | production part in 2nd Example. Schematic which shows the structure of the electromagnetic force generation | occurrence | production part in 3rd Example. Schematic for demonstrating the other structural example of the electromagnetic force generation | occurrence | production part in 3rd Example. Schematic for demonstrating the structure of the tank container in 4th Example. The schematic diagram which shows the filament winding apparatus in 5th Example.

A. First embodiment:
FIG. 1 is a schematic diagram for explaining a first step in a manufacturing process of a high-pressure gas tank by the FW method as one embodiment of the present invention. FIG. 1 is a schematic cross-sectional view of the tank container 10. In the first step, the tank container 10 is prepared. The tank container 10 is a hollow container having a substantially cylindrical cylinder portion 11 and convex and curved first and second dome portions 12a and 12b provided at both ends thereof. The tank container 10 is made of, for example, a resin such as nylon resin. In addition, the tank container 10 may have another shape and may be configured by another member (for example, metal).

  A base portion 15 is attached to the top portion of the first dome portion 12 a of the tank container 10. The base portion 15 has a through hole 16 that communicates with the hollow portion 13 of the tank container 10. The base portion 15 functions as an attachment portion for attaching a pipe or a valve to the tank container 10. The base portion 15 also functions as an attachment portion for attaching the tank container 10 to a filament winding device 100 (hereinafter referred to as “FW device 100”) described later.

  On the top of the second dome portion 12b, recesses 18a and 18b for fitting first and second rotating shafts 110 and 120, which will be described later, are provided on the inside and outside of the tank container 10, respectively. . The concave portions 18 a and 18 b and the base portion 15 are provided so that their centers are located on the central axis CX of the cylinder portion 11.

  FIG. 2 is a schematic diagram for explaining the second step and the third step. FIG. 2 schematically shows the FW device 100 to which the tank container 10 is attached. In FIG. 2, for convenience, the tank container 10 and the first and second rotating shafts 110 and 120 are illustrated in schematic cross-sectional views. Further, in FIG. 2, the reinforcing fibers 5 wound around the outer periphery of the tank container 10 are illustrated by broken lines.

  In the second step, the tank container 10 is attached to the FW device 100. Here, the FW device 100 is a device for winding the reinforcing fiber 5 around the entire outer periphery of the tank container 10 while rotating the tank container 10 in the circumferential direction of the cylinder portion 11. The FW device 100 includes first and second rotation shafts 110 and 120, a support base 130, an electromagnetic force control unit 140, a rotation drive unit 150, a fiber feeding unit 160, and a gas supply unit 170. .

  The first and second rotating shafts 110 and 120 are support shafts for holding the tank container 10 so as to be rotatable about the central axis CX in the FW device 100. When the tank container 10 is attached, the first rotating shaft 110 is inserted into the hollow part 13 of the tank container 10 along the central axis CX of the tank container 10 from the through hole 16 of the base part 15, and the shaft end part 111 thereof is inserted. It fits into the recess 18a. Note that a sealing jig 115 is provided on the first rotary shaft 110. The sealing jig 115 fixes the position of the first rotation shaft 110 so that the center axis of the first rotation shaft 110 coincides with the center axis CX of the tank container 10, and the through hole 16 of the base portion 15. Is hermetically sealed. On the other hand, the second rotating shaft 120 is disposed outside the tank container 10 so that the center axis thereof coincides with the center axis CX of the tank container 10, and the shaft end portion 121 is fitted into the recess 18 b.

  The first and second rotating shafts 110 and 120 are supported by first and second rotating shaft support portions 131 and 132 provided at both ends of the support base 130, respectively. A chuck portion 133 is attached to the first rotating shaft support portion 131. The chuck unit 133 holds the first rotating shaft 110 in a fixed manner and is rotated by a rotation driving unit 150 configured by a motor or the like. That is, the rotational driving force from the rotational driving unit 150 is transmitted to the tank container 10 via the chuck unit 133. The second rotating shaft support part 132 is rotatably held by the second rotating shaft 120, and rotates according to the rotation of the first rotating shaft 110 and the tank container 10.

  In the third step, the reinforcing fiber 5 is supplied to the entire outer periphery of the tank container by so-called hoop winding or helical winding by supplying the reinforcing fiber 5 from the fiber feeding portion 160 while rotating the tank container 10 at a substantially constant speed. Wrap by. The fiber feeding unit 160 includes a reel 161, a tension applying mechanism 162, and a fiber tension control unit 165. The reel 161 is wound with reinforcing fibers 5 that are carbon fibers impregnated with an epoxy resin that is a thermosetting resin in advance. The tension applying mechanism 162 has a roller for feeding the reinforcing fiber 5 from the reel 161. The tension applying mechanism 162 can apply a desired fiber tension to the reinforcing fiber 5 by this roller. The fiber tension control unit 165 issues a command to the tension applying mechanism 162 and controls the fiber tension of the reinforcing fiber 5.

  Here, the first rotating shaft 110 is provided with a communication path 117 that communicates the hollow portion 13 of the tank container 10 with the outside of the tank container 10. A gas supply unit 170 is connected to the communication path 117 via a pipe 171. In the FW device 100, when the reinforcing fiber 5 is wound, the pressure in the tank container 10 is adjusted by supplying gas from the gas supply unit 170 to the hollow portion 13. The FW device 100 suppresses deformation of the tank container 10 due to the reinforcing fiber 5 being wound by the pressure of the gas in the tank container 10.

  By the way, in this 3rd process, the 1st and 2nd rotating shaft is carried out by the change of the fiber tension of the reinforced fiber 5 sent out from the fiber delivery part 160, and the increase in the weight of the tank container 10 by the reinforced fiber 5 wound around. The load on 110 and 120 changes. Accordingly, in the third step, in order to keep the tank container 10 securely held by the first and second rotating shafts 110 and 120, the shaft end portions 111 and 121 of the first and second rotating shafts 110 and 120 are maintained. It is preferable to appropriately control the holding force acting between the two. Therefore, in the FW device 100 according to the present embodiment, the holding force can be controlled by providing the electromagnetic force generator 20 at the shaft end portions 111 and 121 of the first and second rotating shafts 110 and 120. .

  FIGS. 3A to 3C are schematic diagrams for explaining the configuration of the electromagnetic force generation unit 20 provided on the first and second rotating shafts 110 and 120. FIG. 3A is a schematic diagram illustrating the vicinity of the shaft end portions 111 and 121 of the first and second rotating shafts 110 and 120 shown in FIG. 2 in an enlarged manner. FIG. 3B is a schematic view of the shaft end 111 of the first rotating shaft 110 viewed along the direction of the arrow B shown in FIG. 3A, and FIG. It is a schematic diagram when the shaft end part 121 of the 2nd rotating shaft 120 is seen along the direction of the arrow C shown to 3 (A).

  The electromagnetic force generator 20 includes first and second electromagnets 21 and 22 built in shaft end portions 111 and 121 of the first and second rotating shafts 110 and 120, respectively. The first electromagnet 21 is fitted into the shaft end 111 so that one magnetic pole (N pole in the figure) forms the center of the end surface of the shaft end 111. Here, a pair of ring electrodes 114 are attached to the outer periphery of the first rotating shaft 110 outside the sealing jig 115 (FIG. 2). The pair of ring electrodes 114 and the first electromagnet 21 are electrically connected by a built-in conductive line 112 wired inside the first rotating shaft 110. Further, the pair of ring electrodes 114 are electrically connected to the electromagnetic force control unit 140 via a pair of brush electrodes 141 and a pair of conductive wires 143 that rub the electrodes of the pair of ring electrodes 114. Has been. With this configuration, the first electromagnet 21 can be supplied with electric power from the electromagnetic force control unit 140 even when the first rotating shaft 110 is rotating.

  In the second electromagnet 22, a magnetic pole (S pole in the drawing) opposite to the magnetic pole of the first electromagnet 21 constituting the end face of the first rotating shaft 110 constitutes the center portion of the end face of the shaft end portion 121. Are fitted into the shaft end 121. Note that, like the first electromagnet 21, the second electromagnet 22 is connected via a pair of built-in conductive wires 122, a pair of ring electrodes 124, a pair of brush electrodes 142, and a pair of conductive wires 144. The power supply is received from the electromagnetic force control unit 140 (FIG. 2).

  When the reinforcing fiber 5 is wound, the electromagnetic force generator 20 generates an electromagnetic force that attracts the first and second electromagnets 21 and 22 to each other. As a result, the holding force acting between the shaft end portions 111 and 121 of the first and second rotating shafts 110 and 120 increases, so that the tank container 10 can be held more reliably.

  Here, the electromagnetic force generated by the electromagnetic force generation unit 20 is appropriately controlled by controlling the electric power supplied to the first and second electromagnets 21 and 22 by the electromagnetic force control unit 140. That is, the electromagnetic force control unit 140 acquires information on the fiber tension added to the reinforcing fiber 5 from the fiber tension control unit 165, and increases the electromagnetic force of the electromagnetic force generation unit 20 according to the fiber tension. Let In this way, the FW device 100 can reliably hold the tank container 10 so that the holding position of the tank container 10 is not shifted in the third step by the electromagnetic force generated by the electromagnetic force generation unit 20. it can.

  FIG. 4A is a schematic cross-sectional view schematically showing the tank container 10 after the winding of the reinforcing fiber 5 is completed and the thermosetting process is finished. In a 4th process, the thermosetting process which thermosets the thermosetting resin impregnated in the reinforcement fiber 5 is performed by heating the tank container 10 in which the reinforcement fiber 5 was wound. Hereinafter, in the tank container 10, the outer surface layer composed of the reinforcing fibers 5 after the thermosetting resin is cured is referred to as “fiber reinforced layer 7”. The thermosetting process in the fourth step may be performed by heating the tank container 10 while rotating it in the FW device 100.

  FIG. 4B is a schematic diagram for explaining processing performed on the tank container 10 after the tank container 10 is removed from the FW device 100 as the fifth step. FIG. 4B schematically shows a schematic cross section in the vicinity of the first and second recesses 18a and 18b in the tank container 10 in which the fiber reinforced layer 7 is formed. In the fiber reinforced layer 7, a through hole 8 that is continuous with the recess 18 b is generated at a portion where the second rotating shaft 120 is attached. Therefore, in the fifth step, the through hole 8 and the recess 18b are closed by the resin member 9, and the strength of the part in the high-pressure gas tank is prevented from being lowered.

  In addition, after this process, piping and valves for high pressure gas are attached to the cap portion 15 of the tank container 10 to complete the high pressure gas tank.

  FIG. 5 is a schematic diagram for explaining a manufacturing process of a high-pressure gas tank as a comparative example of the present invention and the FW device 100a in the comparative example. FIG. 5 is substantially the same as FIG. 2 except for the following points. That is, in FIG. 5, the rotating shaft attaching part 30 is provided in the tank container 10a instead of the two recessed parts 18a and 18b. In FIG. 5, instead of the first and second rotating shafts 110 and 120, the electromagnetic force generator 20, the ring-shaped electrodes 114 and 124, and the built-in conductive lines 112 and 122 are omitted. Rotating shafts 110a and 120a are provided. Further, in FIG. 5, the electromagnetic force control unit 140, the brush electrodes 141 and 142, and the conductive wires 143 and 144 are omitted.

  In the manufacturing process of the high-pressure gas tank of the comparative example, in the first process, the tank container 10a to which the rotating shaft mounting portion 30 is joined is prepared. The rotating shaft mounting portion 30 is provided with first and second mounting holes 31, 32 for screwing and holding the shaft end portions 111, 121 of the first and second rotating shafts 110a, 120a of the FW device 100a. have.

  The rotating shaft mounting portion 30 improves the bondability and airtightness with the container of the tank container 10a, and the first mounting hole portion 31 is formed in the tank to securely hold the first rotating shaft 110a. It is attached to the tank container 10a so as to protrude toward the hollow portion 13 of the container 10a. In addition, the rotating shaft mounting portion 30 is configured by a relatively high-rigidity member such as a metal, for example, in order to hold the first and second rotating shafts 110a and 120a more securely.

  In the second step of the comparative example, the shaft end portions 111 and 121 of the first and second rotating shafts 110a and 120a are screwed into the first and second mounting hole portions 31 and 32 of the rotating shaft mounting portion 30, respectively. The tank container 10a is attached to the FW device 100a. In the third step, the reinforcing fiber 5 is wound around the entire outer surface of the tank container 10a while rotating the tank container 10a as described in FIG. In the fourth step, after the thermosetting treatment is performed on the tank container 10a, the high pressure gas tank is completed by attaching pipes and valves for the high pressure gas to the base portion 15.

  As described above, the high-pressure gas tank can be manufactured by the FW method using the tank container 100a and the FW device 100a also by the manufacturing process of the comparative example. However, the high-pressure gas tank manufactured by the manufacturing process of the comparative example has a tank volume smaller than that of the high-pressure gas tank manufactured by the manufacturing process of the present embodiment by the amount of the rotating shaft mounting portion 30, and Weight has also increased. Moreover, in the tank container 10a, the airtightness of the hollow portion 13 may be reduced at the joint portion of the rotary shaft attachment portion 30.

  Furthermore, the FW device 100a of the comparative example can easily control the force for holding the tank container 10a according to a change in the fiber tension of the reinforcing fiber 5 or a change in the weight of the tank container 10a when the reinforcing fiber 5 is wound. I can't do it. Therefore, when the rotating shaft mounting portion 30 is omitted or downsized, the tank container 10a may fall off when the load applied to the first and second rotating shafts 110a and 120 changes. Becomes higher.

  Thus, according to the configuration of the present embodiment, when the reinforcing fiber 5 is wound in the manufacturing process of the high-pressure gas tank, the force for holding the tank container 10 is increased by the electromagnetic force of the electromagnetic force generating unit 20. Thus, the tank container 10 can be held more reliably. Further, it is possible to omit or reduce the size of a member for attaching and holding the tank container 10 to the FW device 100, such as the rotary shaft attaching part 30 of the comparative example. . Therefore, it is easy to increase the tank volume of the high-pressure gas tank or reduce the weight.

B. Second embodiment:
FIG. 6 is a schematic diagram showing the configuration of the electromagnetic force generator 20A provided in the FW device as the second embodiment of the present invention. FIG. 6 is substantially the same as FIG. 3A except that a ferromagnetic body 40 is provided instead of the second electromagnet 22. The other configurations in the second embodiment are the same as those in the first embodiment.

  The electromagnetic force generator 20A of the second embodiment is made of a strong metal such as a metal so that the shaft end 121 of the second rotating shaft 120 faces the first electromagnet 21 through the container wall of the tank container 10. The magnetic body 40 is fitted. Even in such a configuration, the shaft end portions 111 and 121 of the first and second rotating shafts 110 and 120 are pulled together by the electromagnetic force of the first electromagnet 21 to the container wall of the tank container 10. The pinching force can be increased.

  Therefore, similarly to the first embodiment, the tank container 10 can be reliably held when the reinforcing fiber 5 is wound. The electromagnetic force generator 20A may be configured such that the second rotation shaft 120 itself is made of a ferromagnetic material. Further, the electromagnetic force generation unit 20 </ b> A may be configured such that the ferromagnetic body 40 is embedded in the first rotation shaft 110 and the second electromagnet 22 is embedded in the second rotation shaft 120.

C. Third embodiment:
FIGS. 7A to 7C are schematic views showing the configuration of the electromagnetic force generator 20B provided in the FW device as the third embodiment of the present invention. 7A to 7C are substantially the same as FIGS. 3A to 3C except that a plurality of third electromagnets 23 are provided on the outer periphery of the second electromagnet 22. The other configurations in the third embodiment are the same as those in the first embodiment.

  In the electromagnetic force generator 20 </ b> B of the third embodiment, a plurality of third electromagnets 23 are fitted into the shaft end 121 of the second rotating shaft 120. Each of the third electromagnets 23 is arranged in an annular shape so that the magnetic poles constitute a part of the end face of the shaft end 121 on the circumference centering on the second electromagnet 22 (see FIG. 7 (C)). In addition, each of the third electromagnets 23 is arranged so that the direction of the magnetic pole is opposite to that of the second electromagnet 22. In addition, each coil of the 3rd electromagnet 23 and the coil of the 2nd electromagnet 22 are mutually connected electrically, and, thereby, the electromagnetic force control part 140 (FIG. 2) via the internal conductive wire 122. ) Commonly receive power supply.

  Here, in order to keep the tank container 10 securely in the winding process of the reinforcing fiber 5, the shaft ends of the first and second rotary shafts 110 and 120 are attached when the tank container 10 is attached to the FW device. It is preferable that the portions 111 and 121 are positioned more accurately. That is, when the tank container 10 is attached, the shaft end portions 111 and 121 are respectively connected to the tank in a state where the positions of the central axes of the first and second rotating shafts 110 and 120 are more accurately matched. It is preferable to fit into the recesses 18 a and 18 b of the container 10.

  Therefore, in the FW device of the third embodiment, the electromagnetic force generator 20 generates an electromagnetic force when the tank container 10 is attached to the FW device in the second step. As a result, the first and second electromagnets 21 and 22 attract each other, and the first and third electromagnets 21 and 23 repel each other. Therefore, the shaft end portions 111 and 121 are guided so that the central axes of the first and second rotating shafts 110 and 120 coincide with each other, and positioning thereof can be performed easily and accurately. Therefore, the tank container 10 is more reliably held in the FW device.

  FIGS. 8A to 8C are schematic views for explaining an electromagnetic force generator 20Ba as another configuration example of the electromagnetic force generator 20B in the third embodiment. 8A to 8C are different from the second and third electromagnets 22 and 23 except that a fourth electromagnet 24 is provided at the shaft end 121 of the second rotating shaft 120. These are almost the same as FIGS. 7 (A) to (C).

  The fourth electromagnet 24 has a ferromagnetic body 240. The ferromagnetic body 240 has a substantially cylindrical central core portion 241 and a substantially cylindrical outer peripheral cylindrical portion 242 centered on the central core portion 241. The central core portion 241 and the outer peripheral cylindrical portion 242 are connected to each other at one end and are continuous. In the fourth electromagnet 24, the end surfaces of the end portions 243 and 244 of the central core portion 241 and the outer peripheral cylindrical portion 242 on the side opposite to the connected end portions constitute the end surface of the shaft end portion 121. And is fitted into the second rotating shaft 120. The fourth electromagnet 24 is arranged so that the central core portion 241 is located at the center of the second rotating shaft 120.

  Here, in the fourth electromagnet 24, a coil electrically connected to the built-in conductive wire 122 is wound around the central core portion 241. Thus, in the fourth electromagnet 24, when an electromagnetic force is generated, the end portions 243 and 244 of the central core portion 241 and the outer cylindrical portion 242 constitute magnetic poles. That is, the fourth electromagnet 24 generates an electromagnetic force that attracts the magnetic poles of the opposing first electromagnet 21 at the end 241 of the central core portion 241, and the magnetic poles of the first electromagnet 21 at the outer peripheral cylindrical portion 242. Generates a repulsive electromagnetic force. With such a configuration, the shaft end portions 111 and 121 of the first and second rotating shafts 110 and 120 can be positioned more accurately and easily, similarly to the electromagnetic force generator 20B described in FIG. Thus, the tank container 10 can be more reliably held in the FW device.

D. Fourth embodiment:
FIG. 9 is a schematic view showing a configuration of a tank container 10C prepared in a manufacturing process of a high-pressure gas tank as a fourth embodiment of the present invention. FIG. 9 is substantially the same as FIG. 3A except that the second dome portion 12b of the tank container 10C is provided with convex portions 19a and 19b instead of the concave portions 18a and 18b. The other configurations in the fourth embodiment are the same as those in the first embodiment.

  At the top of the second dome portion 12b of the tank container 10C, annular convex portions 19a, 19b that can fit the shaft end portions 111, 121 of the first and second rotating shafts 110, 120 are provided. Is formed. These convex portions 19a and 19b fix the shaft end portions 111 and 121 of the first and second rotating shafts 110 and 120 at predetermined positions when the tank container 10C is attached to the FW device 100 (FIG. 2). Functions as a mounting part.

  As described above, in the tank container 10C of the fourth embodiment, the attachment portions of the first and second rotating shafts 110 and 120 are provided without thinning the container wall. Therefore, the strength of the high-pressure gas tank is reduced as compared with the case where the mounting portions of the first and second rotating shafts 110 and 120 are formed by thinning the container wall as in the recesses 18a and 18b in the other embodiments. Can be suppressed. However, when considering an increase in the tank volume or weight reduction of the high-pressure gas tank, it is preferable to form the recesses 18a and 18b as positioning portions as in the other embodiments.

E. Example 5:
FIG. 10 is a schematic diagram showing the configuration of an FW device 100D as a fifth embodiment of the present invention. FIG. 10 is substantially the same as FIG. 2 except that a weight detector 180 and load sensors 181 and 182 for detecting the weight of the attached tank container 10 are provided. The other configurations in the fifth embodiment are the same as those described in the first embodiment. The weight detection unit 180 detects the weight of the tank container 10 via the load sensors 181 and 182 provided on the first and second rotating shaft support units 131 and 132 and transmits the weight to the electromagnetic force control unit 140.

  Here, as described in the first embodiment, the tank container 10 increases in weight as the reinforcing fiber 5 is wound in the winding step of the reinforcing fiber 5. Then, the load applied to the first and second rotating shafts 110 and 120 increases accordingly. Therefore, the electromagnetic force control unit 140 causes the electromagnetic force generation unit 20 to generate an electromagnetic force corresponding to the increase in the weight of the tank container 10 based on the detection result from the weight detection unit 180.

  As described above, in the FW device 100D, even when the weight of the tank container 10 is increased in the winding process of the reinforcing fiber 5, the electromagnetic force for holding the tank container 10 is changed according to the change in the weight. It is generated by the electromagnetic force generator 20. Therefore, the tank container 10 can be more reliably held in the FW device 100D.

F. Variations:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

F1. Modification 1:
In the above embodiment, the electromagnetic force control unit 140 controls the electromagnetic force generated by the electromagnetic force generation unit 20 according to the information on the fiber tension acquired from the fiber tension control unit 165. However, the electromagnetic force control unit 140 may not control the electromagnetic force according to the fiber tension. However, it is preferable to generate an electromagnetic force corresponding to the fiber tension by the electromagnetic force control unit 140 because the force for holding the tank container 10 can be appropriately controlled. Note that the FW device 100 may include a sensor unit that detects the fiber tension applied to the reinforcing fiber 5, and the electromagnetic force control unit 140 may control the electromagnetic force according to information from the sensor unit.

F2. Modification 2:
In the said Example, the recessed parts 18a and 18b and the convex parts 19a and 19b were formed in the tank containers 10 and 10C. However, the concave portions 18a and 18b and the convex portions 19a and 19b may be omitted. However, in order to accurately fix the shaft end portions 111 and 121 of the first and second rotating shafts 110 and 120 at predetermined positions, the tank containers 10 and 10C have recesses 18a and 18b and protrusions. 19a and 19b are preferably formed.

F3. Modification 3:
In the above embodiment, in the winding process of the reinforcing fiber 5, the gas is supplied from the gas supply unit 170 to the hollow portion 13 of the tank container 10 through the pipe 171 and the communication path 117 provided in the first rotating shaft 110. It was. However, the gas supply unit 170, the pipe 171 and the communication path 117 may be omitted. However, since the tank container 10 receives a substantially uniform gas pressure from the inside by the gas supplied to the hollow portion 13, the deformation of the tank container 10 due to the winding of the reinforcing fiber 5 can be more reliably suppressed.

F4. Modification 4:
In the said 1st Example and 2nd Example, the electromagnetic force was generated in the electromagnetic force generation part 20 in the 3rd process. However, the electromagnetic force generator 20 may generate the electromagnetic force attracting the first and second electromagnets 21 and 22 in the second step. As a result, the shaft end portions 111 and 121 of the first and second rotating shafts 110 and 120 are attracted to each other so that they can be guided to a predetermined fixed position.

F5. Modification 5:
In the third embodiment, the electromagnetic force generator 20 </ b> B has the third electromagnet 23. However, the electromagnetic force generator 20 </ b> B may have a permanent magnet instead of the third electromagnet 23. That is, a plurality of permanent magnets may be fitted into the shaft end 121 of the second rotating shaft 120 in the same arrangement as the third electromagnet 23. Even in this case, the shaft end portions 111 and 121 of the first and second rotating shafts 110 and 120 can be positioned more accurately. In addition, since the permanent magnet can be disposed in contact with the second electromagnet 22, the electromagnetic force generator 20 can be downsized.

F6. Modification 6:
In the third embodiment, the first rotating shaft 110 is provided with the first electromagnet 21, the second rotating shaft 120 has the second electromagnet 22 attracting the first electromagnet 21, and the first rotating magnet 110. And a third electromagnet 23 repelling each other. However, the first electromagnet 21 may be provided on the second rotating shaft 120, and the second and third electromagnets 22 and 23 may be provided on the first rotating shaft 110. Further, instead of the second electromagnet 22, a ferromagnetic material or a permanent magnet that is attracted by the first electromagnet 21 may be disposed. Furthermore, a fourth electromagnet that attracts each of the third electromagnets 23 may be provided on the outer periphery of the first electromagnet 21.

DESCRIPTION OF SYMBOLS 5 ... Reinforcement fiber 7 ... Fiber reinforcement layer 8 ... Through-hole 9 ... Resin member 10, 10C, 10a ... Tank container 11 ... Cylinder part 12a ... First dome part 12b ... Second dome part 13 ... Hollow part 15 ... Base Part 16: Through hole 18a, 18b ... Recessed part 19a, 19b ... Projection part 20, 20A, 20B, 20Ba ... Electromagnetic force generating part 21 ... First electromagnet 22 ... Second electromagnet 23 ... Third electromagnet 24 ... Fourth 30 ... Rotating shaft attachment portion 31 ... First attachment hole portion 32 ... Second attachment hole portion 40 ... Ferromagnetic material 100, 100D, 100a ... Filament winding device (FW device)
DESCRIPTION OF SYMBOLS 110,110a ... 1st rotating shaft 111 ... Shaft end part 112 ... Built-in conductive wire 114 ... Ring-shaped electrode 115 ... Sealing jig 117 ... Communication path 120, 120a ... 2nd rotating shaft 121 ... Shaft end part 122 ... Built-in conductive wire 124 ... Ring electrode 130 ... Support base 131 ... First rotary shaft support part 132 ... Second rotary shaft support part 133 ... Chuck part 140 ... Electromagnetic force control parts 141 and 142 ... Brush electrodes 143 and 144 ... Conductive wire 150 ... Rotary drive part 160 ... Fiber feeding part 161 ... Reel 162 ... Tension applying mechanism 165 ... Fiber tension control part 170 ... Gas supply part 171 ... Piping 180 ... Weight detection part 181,182 ... Load sensor 240 ... Ferromagnetic Body 241 ... Central core part 242 ... Cylindrical cylindrical part 243, 244 ... End part CX ... Central axis

Claims (5)

A filament winding apparatus for winding reinforcing fibers around a tank container by a filament winding method,
A tank container holding section for holding the tank container in a rotatable manner;
A rotation drive unit that rotates the tank container held by the tank container holding unit;
Reinforcing fiber supply unit for winding reinforcing fibers around the outer periphery of the tank container by supplying reinforcing fibers to the outer periphery of the rotating tank container;
With
The tank container holding part is inserted into the tank container through an opening provided at the first top part of the tank container, and the second top part of the tank container on the side opposite to the first top part. A first rotating shaft that reaches the container wall; and a second rotating shaft that is disposed outside the tank container at a position opposite to the first rotating shaft across the container wall at the second top portion. Have
The first rotating shaft is held at the first top in a state of being inserted into the tank container,
The first and second rotating shafts hold the tank container by sandwiching the container wall of the second top portion by the first and second shaft end portions facing each other,
The filament winding apparatus, wherein the first and second shaft end portions are provided with an electromagnetic force generating section that generates an electromagnetic force so as to attract the first and second shaft end portions. The filament winding apparatus according to claim 1, further comprising:
An electromagnetic force control unit for controlling the electromagnetic force of the electromagnetic force generation unit,
The electromagnetic force control unit increases the electromagnetic force according to the magnitude of fiber tension generated in the reinforcing fiber when the reinforcing fiber is wound around the tank container, and uses the first and second rotating shafts. A filament winding apparatus for increasing a pinching force of the second container on the container wall in the tank container. The filament winding apparatus according to claim 2, wherein
Having a weight detector for detecting the weight of the tank container held in the tank container holder;
The said electromagnetic force control part is a filament winding apparatus which increases the said electromagnetic force according to the increase in the weight of the said tank container, when winding the said reinforcement fiber around the said tank container. A filament winding apparatus according to any one of claims 1 to 3,
The electromagnetic force generator includes an electromagnet embedded in one of the first or second shaft end portions so that a first magnetic pole is disposed on the container wall side, and the first or second shaft. On the other end, an electromagnet facing member embedded so as to face the first magnetic pole of the electromagnet and attracted by the electromagnetic force of the electromagnet,
The outer periphery of the electromagnet facing member has a magnetic force repelling the first magnetic pole so as to prevent the electromagnet from being displaced toward the outer periphery of the electromagnet facing member when the tank container is attached. A filament winding apparatus in which a magnet to be generated is arranged. A filament winding method for winding reinforcing fibers around a tank container,
(A) The first rotating shaft is inserted into the tank container through an opening provided at the first top of the tank container, and the second of the tank container opposite to the first top is inserted. And holding the second rotating shaft outside the tank container with the container wall of the second top part sandwiched between the first top part and the first top part. By disposing the container wall at the second top portion by the first and second shaft end portions facing each other of the first and second rotation shafts, disposed at a position opposite to the rotation shaft, Holding the tank container rotatably;
(B) wrapping the reinforcing fiber around the outer periphery of the tank container by rotating the tank container and supplying the reinforcing fiber to the outer periphery of the rotating tank container;
With
The filament winding method, wherein the step (a) or (b) includes a step of generating an electromagnetic force so as to bring the first and second shaft end portions together.

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