Fiber-reinforced resin cylinder, method for manufacturing fiber-reinforced resin cylinder, and jig for manufacturing fiber-reinforced resin cylinder

Abstract

Provided is a fiber-reinforced resin cylinder which can prevent the insertion of resin residues and improve the workability of core removal. The fiber-reinforced resin cylinder (2) is provided with a fiber-reinforced resin cylinder member (40) and a metal cylinder member (50), the metal cylinder member (50) is fixed to the inner peripheral surface of an axial end portion (40b) of the fiber-reinforced resin cylinder member (40), and the inner diameter (D51) of the metal cylinder member (50) is larger than the inner diameter (D41) of the fiber-reinforced resin cylinder member (40).

Description

Technical Field

[0001] The present invention relates to a fiber-reinforced resin cylindrical body used as, for example, a propeller shaft of a vehicle, a method for manufacturing the fiber-reinforced resin cylindrical body, and a jig for manufacturing the fiber-reinforced resin cylindrical body. Background Art

[0002] Patent document 1 discloses a technology in which, when manufacturing a fiber-reinforced resin cylindrical body, a metal cylindrical part is arranged at the end of a core shaft serving as a base, and then fibers are wound around the outer peripheral surface of the core shaft and the cylindrical part. Next, the core shaft and the cylindrical part with the fibers wound thereon are arranged in a mold, and then the mold is filled with resin to impregnate the fibers and then solidify to manufacture the cylindrical body. [Prior art literature] [Patent Document]

[0003] Patent Document 1: Japanese Patent Application No. 6873369. Summary of the Invention [Technical problem to be solved by the invention]

[0004] When the resin is filled into the mold, a portion of the resin does not impregnate the fibers but flows and solidifies between the fiber layer and the mandrel, forming a portion of the resin layer. Here, another portion of the resin sometimes solidifies while being separated from the resin layer, remaining between the resin layer and the mandrel as resin residue. In addition, when the resin is impregnated between the metal tubular component and the mandrel, the resin sometimes solidifies between the tubular component and the mandrel with a certain gap and becomes resin residue. The resin residue becomes a friction factor because it remains between the mandrel and the metal tubular component, so a large loading force may be required during the extraction (de-coring) operation of the mandrel.

[0005] The present invention has been made in view of the above circumstances, and its technical object is to provide a fiber-reinforced resin barrel, a method for manufacturing a fiber-reinforced resin barrel, and a jig for manufacturing a fiber-reinforced resin barrel that can prevent the intrusion of resin residues and improve the workability of core removal. [Technical solutions for solving technical problems]

[0006] According to the present invention, a fiber-reinforced resin cylinder body is provided, which has a fiber-reinforced resin cylinder component and a metal cylinder component, wherein the metal cylinder component is fixed to the inner circumferential surface of the end portion of the fiber-reinforced resin cylinder component, and the inner diameter of the metal cylinder component is larger than the inner diameter of the fiber-reinforced resin cylinder component. [Effects of the Invention]

[0007] According to the present invention, a fiber-reinforced resin cylinder can be provided. When the core shaft is separated from the fiber-reinforced resin cylinder, no sliding occurs between the outer peripheral surface of the core shaft and the inner peripheral surface of the metal tubular component, thereby reducing the drag resistance caused by resin residues and improving the manufacturability by improving the core removal operability. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a cross-sectional view schematically showing a jig for manufacturing a fiber-reinforced resin cylindrical body according to the first embodiment of the present invention. Figure 2 This is a diagram schematically showing a fiber-reinforced resin cylindrical body manufactured using the jig for manufacturing a fiber-reinforced resin cylindrical body according to the first embodiment of the present invention. Figure 3 This is a schematic diagram for explaining the method for manufacturing a fiber-reinforced resin cylindrical body according to the first embodiment of the present invention, and is a diagram schematically showing a first carbon fiber layer. Figure 4 It is a schematic diagram for explaining the method for manufacturing a fiber-reinforced resin cylindrical body according to the first embodiment of the present invention, and is a diagram schematically showing a second carbon fiber layer. Figure 5 This is a schematic diagram for explaining the method for manufacturing a fiber-reinforced resin cylindrical body according to the first embodiment of the present invention, and schematically shows a third carbon fiber layer. Figure 6 This is a flowchart for explaining a method for manufacturing a fiber-reinforced resin cylindrical body according to the first embodiment of the present invention. Figure 7 It is a schematic diagram for explaining a method for manufacturing a fiber-reinforced resin cylindrical body according to the first embodiment of the present invention, and is a cross-sectional view schematically showing a state in which a first mandrel and an elastic member are assembled. Figure 8 This is a schematic diagram for explaining a method for manufacturing a fiber-reinforced resin cylindrical body according to the first embodiment of the present invention, and is a cross-sectional view schematically showing a state in which a first mandrel, an elastic member, and a metal cylindrical member are assembled. Figure 9 This is a schematic diagram for explaining a method for manufacturing a fiber-reinforced resin cylindrical body according to the first embodiment of the present invention, and is a cross-sectional view schematically showing a state in which a jig on which a carbon fiber layer is arranged is set in a molding device. Figure 10 It is a schematic diagram for explaining the method for producing a fiber-reinforced resin cylindrical body according to the first embodiment of the present invention, and is a cross-sectional view schematically showing an intermediate body taken out from a molding apparatus. Figure 11It is a schematic diagram for explaining a method for producing a fiber-reinforced resin cylindrical body according to the first embodiment of the present invention, and is a partially enlarged cross-sectional view schematically showing an intermediate body taken out from a molding apparatus. Figure 12 It is a partially enlarged cross-sectional view schematically showing a jig for manufacturing a fiber-reinforced resin cylindrical body according to a second embodiment of the present invention. Figure 13 It is a partially enlarged cross-sectional view schematically showing a jig for manufacturing a fiber-reinforced resin cylindrical body and a fiber-reinforced resin cylindrical body according to a second embodiment of the present invention. Figure 14 It is a partially enlarged cross-sectional view schematically showing a jig for manufacturing a fiber-reinforced resin cylindrical body according to a third embodiment of the present invention. Figure 15 It is a partially enlarged cross-sectional view schematically showing a jig for manufacturing a fiber-reinforced resin cylindrical body and a fiber-reinforced resin cylindrical body according to a third embodiment of the present invention. Figure 16 It is a partially enlarged cross-sectional view schematically showing a jig for manufacturing a fiber-reinforced resin cylindrical body according to a fourth embodiment of the present invention. Figure 17 It is a partially enlarged cross-sectional view schematically showing a jig for manufacturing a fiber-reinforced resin cylindrical body and a fiber-reinforced resin cylindrical body according to a fourth embodiment of the present invention. DETAILED DESCRIPTION

[0009] An embodiment of the present invention will be described in detail with reference to the accompanying drawings, using the example of a fiber-reinforced resin cylinder made of carbon fiber reinforced plastic. In the following description, identical components are denoted by the same reference numerals, and duplicate descriptions are omitted. Furthermore, the accompanying drawings are exaggerated for ease of understanding.

[0010] <First embodiment> like Figure 1 As shown, a jig for manufacturing a fiber-reinforced resin cylindrical body (hereinafter referred to as a "jig") 1A according to the first embodiment is used to manufacture a fiber-reinforced resin cylindrical body 2 (see Figure 2 ), having a first spindle 10A, a pair of second spindles 20A, 20A and a pair of elastic members 30A, 30A.

[0011] The First Axis The first core shaft 10A is a metal component in a cylindrical shape (approximately cylindrical in the present embodiment). In the present embodiment, the first core shaft 10A is removed from the interior of the fiber-reinforced resin cylinder 2. The first core shaft 10A integrally includes a first column portion (large diameter portion) 11 in the axial middle portion and second column portions (medium diameter portions) 12, 12 formed coaxially with the first column portion 11 at both axial ends. A recessed portion 10a is formed in the axial direction at the axial end portion of the second column portion 12. The first core shaft 10A can be a resin component having a certain degree of heat resistance and hardness.

[0012] The Second Axis The second spindle 20A is a metal component in a cylindrical shape (approximately cylindrical in this embodiment). The second spindle 20A integrally includes a third column portion (middle diameter portion) 21 coaxially arranged with the second column portion 12 and extending in a direction away from the first column portion 11, and a fourth column portion 22 coaxially extending from the third column portion 21 toward the first spindle 10A. The second spindle 20A can be a resin component having a certain degree of heat resistance and hardness. On the outer peripheral surface of the third column portion 21, a tapered portion 21a is formed on the end portion on the side of the fourth column portion 22, which decreases in diameter as it approaches the fourth column portion 22.

[0013] The outer diameter D of the third column portion 21 of the second spindle 20A 21 than the outer diameter D of the second column portion 12 of the first mandrel 10A 12 The outer diameter D of the fourth column portion 22 of the second spindle 20A is 22 The inner diameter D of the recess 10a of the first mandrel 10A is 13 The axial dimension L of the fourth column portion 22 of the second spindle 20A is equal to 22 The axial dimension (depth) L of the recess 10a of the first spindle 10A is 13 That is, when the fourth column portion 22 of the second mandrel 20A is fitted (internalized) in the recess 10a of the first mandrel 10A, the fourth column portion 22 of the second mandrel 20A and the second column portion 12 of the first mandrel 10A are arranged continuously with each other.

[0014] The first and second spindles 10A, 20A are detachably secured to each other by bolts B. Bolts B penetrate the first and second spindles 10A, 20A, from the side of the second spindle 20A and screw into the internal threaded portion 10b of the first spindle 10A, thereby securing the first and second spindles 10A, 20A. In addition to securing the first and second spindles 10A, the first and second spindles 20A, 20A, and 20A may be secured to each other using, for example, a retaining ring.

[0015] Elastic components The elastic component 30 is formed of an elastic material and is a component in the shape of a tube (in this embodiment, a cylindrical shape) with a uniform inner diameter. In this embodiment, the elastic component 30 is removed from the inside of the fiber-reinforced resin cylinder 2. During the manufacturing stage of the fiber-reinforced resin cylinder 2, the elastic component 30 is a component for achieving the function of fixing the position of the metal cylinder component 50 and achieving sealing properties on the inner circumferential side of the metal cylinder component 50 to prevent the resin 44 from penetrating into the metal cylinder component 50. In addition, when the first core shaft 10A is removed from the inside of the fiber-reinforced resin cylinder 2, the elastic component 30 is a component for ensuring space for discharging resin residues. The elastic component 30 can use a material that can withstand the heating when the resin of the fiber-reinforced resin cylinder 2 is cured. Examples of such materials include NR (natural rubber), CR (chloroprene rubber), ethylene-propylene-diene rubber (EPDM), etc.

[0016] Inner diameter D of elastic member 30A 31 (Refer to Figure 7 ) and the outer diameter D of the second column portion 12 12 Equal to, and greater than the outer diameter D of the third column portion 21 21 The elastic member 30A is inserted into the second mandrel 20A and is clamped between the second mandrel 20A and the metal cylindrical member 50 and compressed in the radial direction, and its structure flows toward the first mandrel 10A side. The outer diameter D of the elastic member 30 is 32 (Refer to Figure 7 ) is larger than the outer diameter D of the first column portion 11 11 The axial dimension L of the elastic member 30 is large. 30 The axial dimension L of the second column portion 12 12 , and the axial dimension L of the third column portion 21 21 The elastic member 30A is fitted (outer-fitted) to the second column portion 12 and the third column portion 21 .

[0017] In addition, the axial dimension L of the elastic member 30A is 30 (and the axial dimension L of the metal cylinder member 50 described later) 50 ) can be larger than the axial dimension L of the second column portion 12 22 The sum of the axial dimensions of the third column 21 is smaller. In this case, the end of the third column 21 is exposed in the axial direction from the elastic member 30A and the metal cylinder member 50, so that the second mandrel 20A can be easily removed in step S9 described later. In addition, the axial dimension L of the elastic member 30A is smaller than that of the third column 21. 30 The relationship between the axial dimensions of other components is not limited to the above-mentioned relationship.

[0018] <Fiber-reinforced resin cylinder> like Figure 2 As shown, use fixture 1A (refer to Figure 1) is a cylinder body that can be applied to, for example, a propeller shaft for a vehicle, a high-pressure tank, a golf club shaft, a fishing rod, etc., and has a fiber-reinforced resin cylinder component 40 and a pair of metal cylinder components 50, 50.

[0019] <Fiber-reinforced resin cylinder component> The fiber-reinforced resin tubular member 40 is a fiber-reinforced resin layer (resin fiber layer) formed in a tubular shape along the outer peripheral surface of the clamp 1A. The axial ends of the fiber-reinforced resin tubular member 40 (the portions where the metal tubular member 50 is fixed) are formed to have a larger diameter than the axial middle portion. Figures 3 to 5 As shown, the fiber-reinforced resin tubular component 40 has, as carbon fiber layers, a first carbon fiber layer 41, a second carbon fiber layer 42, and a third carbon fiber layer 43 in order from the radially inner side (the side of the clamp 1A). The carbon fibers (second carbon fibers) constituting the second carbon fiber layer 42 and the third carbon fiber layer 43 have greater strength and a smaller elastic modulus than the carbon fibers (first carbon fibers) constituting the first carbon fiber layer 41. Figures 3 to 5 , only a portion of the carbon fiber layers 41, 42, and 43 is shown. Furthermore, the outer peripheral surface of a portion of the metal tube member 50 (the portion corresponding to both ends of the clamp 1A) is not covered by the fiber-reinforced resin tube member 40 but protrudes from the fiber-reinforced resin tube member 40.

[0020] The fiber-reinforced resin tubular member 40 integrally includes an axially intermediate portion 40a and a pair of axially end portions 40b, 40b extending axially outward from the axial ends of the axially intermediate portion 40a. The inner diameter D of the axially end portion 40b is 42 than the inner diameter D of the axial middle portion 40a 41 big.

[0021] First carbon fiber layer like Figure 3 As shown, the first carbon fiber layer 41 is composed of a plurality of carbon fibers arranged relative to the outer circumference of the first mandrel 10A, etc., so as to cover the first mandrel 10A. More specifically, the first carbon fiber layer 41 is formed by winding a plurality of carbon fibers into a ribbon or bundle to form a carbon fiber aggregate, and then arranging the plurality of carbon fiber aggregates with varying phases. The carbon fibers of the first carbon fiber layer 41 extend parallel to the axis of the first mandrel 10A. That is, in the first carbon fiber layer 41, the orientation angle of the carbon fibers relative to the axis of the first mandrel 10A is 0°.

[0022] Second carbon fiber layer like Figure 4As shown, the second carbon fiber layer 42 is disposed radially outward of the first carbon fiber layer 41 and is composed of a plurality of carbon fibers arranged so as to cover the first carbon fiber layer 41. More specifically, the second carbon fiber layer 42 is formed by winding a plurality of carbon fibers into a ribbon or bundle to form a carbon fiber aggregate, and then arranging the plurality of carbon fiber aggregates by varying their phases. The carbon fibers of the second carbon fiber layer 42 are wound for at least one revolution at an inclination of 45° relative to the axis of the first mandrel 10A and extend helically relative to the axis of the first mandrel 10A. In other words, in the second carbon fiber layer 42, the carbon fibers are oriented at a 45° angle relative to the axis of the first mandrel 10A.

[0023] The third carbon fiber layer like Figure 5 As shown, the third carbon fiber layer 43 is disposed radially outward of the second carbon fiber layer 42 and is composed of a plurality of carbon fibers arranged so as to cover the second carbon fiber layer 42. More specifically, the third carbon fiber layer 43 is formed by winding a plurality of carbon fibers into a ribbon or bundle to form a carbon fiber aggregate, and then arranging the plurality of carbon fiber aggregates with varying phases. The carbon fibers of the third carbon fiber layer 43 are wound for at least one revolution at an inclination of -45° relative to the axis of the first mandrel 10A and extend helically relative to the axis of the first mandrel 10A. In other words, in the third carbon fiber layer 43, the carbon fibers are oriented at a -45° angle relative to the axis of the first mandrel 10A.

[0024] Metal cylinder parts The metal tube member 50 is a metal member having a cylindrical shape (a circular cylindrical shape in this embodiment). An axial portion of the metal tube member 50 is fixed to the inner circumferential surface of the axial end portion 40b of the fiber-reinforced resin tube member 40, while another axial portion thereof protrudes axially from the fiber-reinforced resin tube member 40.

[0025] The inner diameter D of the metal cylinder member 50 51 than the outer diameter D of the first column portion 11 11 (That is, the inner diameter D of the axially intermediate portion 40a of the fiber-reinforced resin tube member 40 41 ) is larger than the outer diameter (normal state) D of the elastic member 30A 32 (Refer to Figure 7 ) is slightly larger (the same applies to the second, third and fourth embodiments described later). The axial dimension L of the metal cylinder member 50 is 50 The axial dimension L of the elastic member 30A 30 The metal cylindrical member 50 is fitted (outer-fitted) to the elastic member 30A during the manufacturing process. In addition, the axial dimension L of the metal member 50 is 50 The axial relationship with other components is not limited to the above relationship.

[0026] The metal cylinder member 50 is a member for mounting other metal members. For example, when the fiber-reinforced resin cylinder 2 is used as a propeller shaft of a vehicle, a universal joint (short yoke, sliding universal joint shaft member) is joined to the metal cylinder member 50 by welding or the like.

[0027] <Manufacturing method> Next, use Figure 6 The flowchart of the present invention is used to illustrate the manufacturing method of the fiber-reinforced resin barrel body 2 using the clamp 1A involved in the first embodiment of the present invention. The manufacturing method of the fiber-reinforced resin barrel body 2 includes a core shaft forming process (step S1) and an elastic component fitting process (step S2) performed after the core shaft forming process. In addition, the manufacturing method of the fiber-reinforced resin barrel body 2 includes a metal barrel component fitting process (step S3) performed after the elastic component fitting process and a second core shaft fitting process (step S4) performed after the metal barrel component fitting process. In addition, the manufacturing method of the fiber-reinforced resin barrel body 2 includes a fiber setting process (steps S5A to S5C) performed after the second core shaft fitting process and a mold setting process (step S6) performed after the fiber setting process. In addition, the manufacturing method of the fiber-reinforced resin barrel body 2 includes a molding process (step S7) performed after the mold setting process, a removal process (step S8) performed after the molding process, and a clamp removal process (step S9) performed after the removal process.

[0028] Step S1 is to form a Figure 1 The process of manufacturing the first mandrel 10A and the second mandrel 20A made of resin is shown.

[0029] Following step S1, in step S2, as Figure 7 As shown, the first spindle 10A and the pair of elastic members 30 , 30 are fitted together. In this embodiment, a portion of the elastic member 30A in the axial direction is fitted outside the second column portion 12 .

[0030] Following step S2, in step S3, as Figure 8 As shown, the elastic member 30 and the metal tube member 50 are fitted together. In this embodiment, the metal tube member 50 is fitted onto the elastic member 30A.

[0031] Following step S3, in step S4, as Figure 1As shown, the second spindle 20A is fitted into the first spindle 10A and the other axial portion of the elastic member 30A. In this embodiment, the fourth column portion 22 is fitted into the recess 10a, and the third column portion 21 is fitted into the other axial portion of the elastic member 30A. Here, the second spindle 20A is fitted into the elastic member 30A by the axial force generated by the tightening bolt B, while radially compressing the elastic member 30A until it abuts against the first spindle 10A. Furthermore, the other axial portion of the elastic member 30A is radially compressed and deformed by being clamped between the third column portion 21 and the metal tubular member 50. The compressed and deformed elastic member 30A flows between the uncompressed second column portion 12 and the metal tubular member 50, thereby closing the minute gap between the outer circumferential surface of the elastic member 30A and the metal tubular member 50, as well as the minute gap between the elastic member 30A and the second column portion 12.

[0032] Following step S4, in step S5A, as Figure 3 As shown, the first carbon fiber layer 41 is formed on the outer peripheral surface of the first column portion 11 of the first mandrel 10A and the metal cylindrical members 50, 50. Next, in step S5A, in step S5B, as shown in FIG. Figure 4 As shown, the second carbon fiber layer 42 is formed on the outer peripheral surface of the first column portion 11 of the first mandrel 10A and the first carbon fiber layer 41 of the metal cylindrical member 50, 50. Next, in step S5B, in step S5C, as shown in FIG. Figure 5 As shown, the third carbon fiber layer 43 is formed on the outer circumference of the first column portion 11 of the first mandrel 10A and the second carbon fiber layer 42 of the metal cylindrical members 50, 50. In steps S5A to S5C, the carbon fiber layers 41 to 43 are formed on the end portion of the metal cylindrical member 50 located opposite the first column portion 11 in the axial direction, so that no fibers are arranged.

[0033] In steps S5A to S5C, the carbon fiber layers 41 to 43 are so-called raw yarns, not resin-impregnated fibers. Furthermore, the carbon fiber layers 41 to 43 are simultaneously arranged on the first column portion 11 of the first mandrel 10A and the outer circumferential surfaces of the metal cylindrical members 50, 50 using a multi-filament winding (MFW) method. The carbon fiber layers 41 to 43 fed by the multi-filament winding method exhibit a so-called non-crimp structure, in which the carbon fiber layers are not woven together but are independent layers.

[0034] In steps S5A to S5C, the carbon fiber layers 41 to 43 are arranged on the outer peripheral surface of the first mandrel 10A or the like by a device (not shown). This device can appropriately adjust the orientation angles of the carbon fiber layers 41 to 43. Alternatively, the carbon fiber layers 41 to 43 may be arranged in a cylindrical shape by the device and then arranged on the outer peripheral surface of the first mandrel 10A or the like.

[0035] In the (single-filament) filament winding method, a jig having multiple radially extending pins is placed at both ends of a mandrel. A single carbon fiber strand is repeatedly wound around the outer circumference of the mandrel while being secured to the pins, thereby forming a fiber layer. Therefore, in the (single-filament) filament winding method, the carbon fiber layer 41, which is not wound around the first mandrel 10A or the like and needs to be arranged in a pattern of less than one revolution, may not be properly retained on the outer circumference of the first mandrel 10A or the like.

[0036] In contrast, in the multi-filament winding method, the carbon fiber layers 41 to 43 are arranged in a cylindrical layer formed of multiple carbon fibers, and then the jig 1A and the metal cylindrical member 50 are inserted into the cylindrical layer (or the cylindrical layer is externally fitted to the jig 1A and the metal cylindrical member 50). In addition, in the multi-filament winding method, the carbon fiber layers 41 to 43 can be formed simultaneously. Therefore, in the multi-filament winding method, the carbon fiber layer 41, which is not wound around the first mandrel 10A and needs to be arranged in a manner less than one turn, can be appropriately held on the outer peripheral surface of the first mandrel 10A and the like by the radially outer carbon fiber layers 42 and 43.

[0037] Following step S5C, in step S6, the assembly of the jig 1A and the carbon fiber layers 41 to 43 is placed in the molding device 100 (mold) (see Figure 9 ).

[0038] Following step S6, in step S7, as Figure 9As shown, resin 44 is supplied to the molding device 100. Thus, the resin 44 impregnates the carbon fiber layers 41 to 43 arranged on the outer peripheral surfaces of the jig 1A and the metal tubular parts 50, 50. Moreover, the resin 44 is cured by heating the molding device 100, and the fiber-reinforced resin tubular part 40 is formed by the so-called RTM (Resin Transfer Molding, resin injection molding) process, and the fiber-reinforced resin tubular part 40 and the metal tubular parts 50, 50 are integrally molded (step S7, molding process). The resin 44 is, for example, a thermosetting resin. In this embodiment, the mold of the molding device 100 is divided into multiple parts. In step S7, the assembly is heated, and a mold closing operation is performed to close the mold of the molding device 100. Then, a mold clamping operation is performed to apply pressure to the closed mold, thereby increasing the pressure in the mold and promoting the curing of the resin 44. In addition, in this embodiment, the structure in which the mold is divided into multiple parts is described, so the mold closing operation and the mold clamping operation are performed, but the mold clamping operation is not necessary. In addition, when the mold is not divided into multiple parts, the mold closing operation and mold clamping operation are not necessary. In the molding device 100, a space (resin reservoir) can be formed on the outlet side of the gate 101 for introducing the molten resin 44. The resin 44 introduced into the molding device 100 is stored in the resin reservoir located on the side of the first end of the carbon fiber layers 41 to 43. The resin 44 stored in the resin reservoir is moved along the axial direction of the jig 1A by vacuum suction from the suction port 102, and impregnates the carbon fiber layers 41 to 43, wherein the suction port 102 is formed on the opposite side of the gate 101 (on the outer peripheral surface side of the second end of the carbon fiber layers 41 to 43) in the arrangement direction of the carbon fiber layers 41 to 43. In the state where the resin 44 impregnates the carbon fiber layers 41 to 43, the molding device 100 is heated and pressure is applied to the molding device 100, thereby forming the fiber-reinforced resin tubular component 40.

[0039] Following step S7, in step S8, the molded assembly, i.e., the intermediate body, is taken out from the molding device 100 (see Figure 10 and Figure 11 ).

[0040] Following step S8, in step S9, the clamp extraction process is performed ( Figure 10 → Figure 2 This clamp extraction step is an example of a separation step for separating the fiber-reinforced resin tubular body 2 and the clamp 1A from each other, and is a step of removing the clamp 1A from the end opening side of the metal tubular member 50 toward the outside of the fiber-reinforced resin tubular member 40. This achieves weight reduction of the fiber-reinforced resin tubular body 2.

[0041] The jig 1A is removed in the order of second mandrel 20A, elastic member 30A, and first mandrel 10A. This jig removal process prevents resin 44 from penetrating the inner circumferential surface of the metal tubular member 50, thereby suppressing the formation of resin residue on the inner circumferential surface of the metal tubular member 50. Furthermore, when the first mandrel 10A is removed, the removal of the elastic member 30 ensures a space for the removal of resin residue (dirt) generated between the first column portion 11 and the fiber-reinforced tubular member 50, thereby improving the ease of removal (core removal) of the jig 1A.

[0042] The fiber-reinforced resin cylinder 2 according to the first embodiment of the present invention comprises a fiber-reinforced resin cylinder member 40 and a metal cylinder member 50 fixed to the inner peripheral surface of the end portion (axial end portion 40b) of the fiber-reinforced resin cylinder member 40. The inner diameter D of the metal cylinder member 50 is 51 than the inner diameter D of the fiber-reinforced resin tube member 40 41 big. Therefore, the fiber-reinforced resin cylinder 2 can prevent the intrusion of resin residues, thereby improving the workability of core removal.

[0043] In the fiber-reinforced resin tubular body 2 , the fiber-reinforced resin tubular component 40 is integrally molded with the metal tubular component 50 by the MFW process and the RTM process. Therefore, the fiber-reinforced resin tubular body 2 can solve the problems inherent in the MFW process and the RTM process, and can be stably mass-produced.

[0044] In addition, the manufacturing method of the fiber reinforced resin cylinder 2 involved in the first embodiment of the present invention includes: a process (step S2) of making the second column portion 12 of the first core shaft 10A having the first column portion 11 and the second column portion 12 and a part of the cylindrical elastic component 30A fit together, wherein the second column portion 12 is axially extended from the end of the first column portion 11 and has a smaller diameter than the first column portion 11; making the elastic component 30A and the metal cylinder component 50 fit together in a manner that the metal cylinder component 50 is located radially outside. process (step S3); a process of engaging the other part of the elastic component 30A with the cylindrical second core shaft 20A (step S4); a process of forming a fiber-reinforced resin tube component 40 on the outer peripheral surface of the first core shaft 10A and the metal tube component 50 (steps S5A, S5B, S5C, S6, S7); and a process of separating the first core shaft 10A, the elastic component 30A and the second core shaft 20A from the fiber-reinforced resin tube component 40 and the metal tube component 50 (step S9). Therefore, according to the method for manufacturing the fiber-reinforced resin cylindrical body 2, it is possible to prevent the intrusion of resin residues, thereby improving the workability of the core removal and the productivity of the fiber-reinforced resin cylindrical body 2.

[0045] In addition, the first embodiment of the present invention involves a jig 1A for manufacturing a fiber-reinforced resin cylinder having: a first core shaft 10A, which has a first column portion 11 on which fibers are arranged on the outer peripheral surface and a second column portion 12 extending axially from the end of the first column portion 11 and having a smaller diameter than the first column portion 11; a second core shaft 20A, which has a third column portion 21 coaxially arranged with the second column portion 12 and extending in a direction away from the first column portion 11; and a tubular elastic component 30A, which is engaged with the second column portion 12 and the third column portion 21 and has an outer diameter larger than the outer diameter of the first column portion 11. Therefore, the jig 1A for manufacturing a fiber-reinforced resin barrel body can prevent the intrusion of resin residues when manufacturing the fiber-reinforced resin barrel body 2 formed by integrating the fiber-reinforced resin barrel member 40 and the metal barrel member 50, thereby improving the workability of core removal and the productivity of the fiber-reinforced resin barrel body 2.

[0046] In the jig 1A for manufacturing a fiber-reinforced resin cylindrical body, the second mandrel 20A has an outer diameter D larger than the inner diameter of the elastic member 30. 22 . According to the jig 1A for manufacturing a fiber-reinforced resin cylindrical body, the elastic member 30A, which is sandwiched and compressed between the third column portion 21 and the metal cylindrical member 50, is compressed, and the elastic member 30A is deformed so as to flow between the second column portion 12 and the metal cylindrical member 50. Furthermore, the minute gaps generated between the second column portion 12 and the elastic member 30A and the minute gaps generated between the metal cylindrical member 50 and the elastic member 30A can be reduced. Therefore, the jig 1A for manufacturing a fiber-reinforced resin cylindrical body can suppress the resin 44 from penetrating between the elastic member 30A and other members, thereby improving the workability of the core removal and the productivity of the fiber-reinforced resin cylindrical body 2 .

[0047] In the jig 1A for manufacturing a fiber-reinforced resin cylindrical body, the end portion of the outer peripheral surface of the third column portion 21 on the second column portion 12 side is formed as a tapered surface (tapered portion 21 a ) that decreases in diameter as it approaches the second column portion 12 . According to the jig 1A for manufacturing a fiber-reinforced resin cylinder, the elastic component 30A clamped and compressed between the third column portion 21 and the metal cylinder component 50 is promoted to deform toward the second column portion 12 by the tapered portion 21a, thereby reducing the tiny gap generated between the second column portion 12 and the elastic component 30A and the tiny gap generated between the metal cylinder component 50 and the elastic component 30A. Therefore, the jig 1A for manufacturing a fiber-reinforced resin cylindrical body can suppress the resin 44 from penetrating between the elastic member 30A and other members, thereby suppressing a decrease in the workability of the core removal and improving the productivity of the fiber-reinforced resin cylindrical body 2 .

[0048] In the jig 1A for manufacturing a fiber-reinforced resin cylinder, one of the first spindle 10A and the second spindle 20A (the second spindle 20A in this embodiment) has a fourth column portion 22, and the fourth column portion 22 is inserted into the recess 10a formed by the other of the first spindle 10A and the second spindle 20A (the first spindle 10A in this embodiment). Therefore, the jig 1A for manufacturing a fiber-reinforced resin cylindrical body can achieve equalization of the compression of the elastic member 40 in the circumferential direction by reliably aligning the central axes of the first mandrel 10A and the second mandrel 20A.

[0049] <Second embodiment> Next, a clip according to a second embodiment of the present invention will be described, focusing on differences from the clip 1A according to the first embodiment.

[0050] like Figure 12 and Figure 13 As shown in FIG. 1 , a jig 1B according to a second embodiment of the present invention includes a second spindle 20B and an elastic member 30B instead of the second spindle 20A and the elastic member 30A.

[0051] The Second Axis The second mandrel 20B does not have the tapered portion 21a. In the second mandrel 20B, the outer diameter D of the third column portion 21 is 21 The outer diameter D of the second column portion 12 12 equal.

[0052] Elastic components The elastic member 30B has a stepped shape on its inner circumference and integrally includes a thin-walled portion 31 in one axial portion that can be fitted with the second column portion 12 and a thick-walled portion 32 in another axial portion that can be fitted with the third column portion 21. The inner diameter D of the thin-walled portion 31 is 33 The outer diameter D of the second column portion 12 12 The inner diameter D of the thick wall portion 32 is equal to 34 than the outer diameter D of the third column portion 21 21 Small.

[0053] In the jig 1B for manufacturing a fiber-reinforced resin cylindrical body according to the second embodiment of the present invention, the outer diameter of the third column portion 21 is larger than the inner diameter of the elastic member 30B. Therefore, the jig 1B for manufacturing a fiber-reinforced resin cylindrical body can appropriately compress the elastic member 30B similarly to the elastic member 30A described above, and can appropriately prevent the resin 44 from entering the inner peripheral surface side of the metal cylindrical member 50 .

[0054] <Third embodiment> Next, a clip according to a third embodiment of the present invention will be described, focusing on differences from the clip 1A according to the first embodiment.

[0055] like Figure 14 and Figure 15 As shown, a jig 1C according to the third embodiment of the present invention includes a second spindle 20C and an elastic member 30C instead of the second spindle 20A and the elastic member 30A.

[0056] The Second Axis The second mandrel 20C does not have the tapered portion 21a. In the second mandrel 20C, the outer diameter D of the third column portion 21 is 21 The outer diameter D of the second column portion 12 12 Furthermore, the axial dimension of the third column portion 21 of the second spindle 20C is set larger than that of the first embodiment, and the second spindle 20C includes a flange portion 23 projecting radially outward from the third column portion 21 .

[0057] Elastic components The elastic member 30C is sandwiched between the first end surface 10 c forming the boundary between the first column portion 11 and the second column portion 12 and the second end surface 20 a forming the flange portion 23 .

[0058] Axial dimension of the elastic member 30C (normal state) L 30 The distance between the first end face 10b and the second end face 20a, that is, the axial dimension of the second column portion 12 (the distance between the first end face 10c and the end face 10d of the second column portion 12) L 12 With the third column 21 The axial dimension (the distance in the axial direction between the second end face 20a and the end face constituting the boundary between the third column portion 21 and the fourth column portion 22) L 21 That is, the elastic member 30C is compressed and deformed in the axial direction by being sandwiched between the first end surface 10b and the second end surface 20a.

[0059] In the jig 1C for manufacturing a fiber-reinforced resin cylindrical body according to the third embodiment of the present invention, the second mandrel 20C has a second end surface 20a that cooperates with a first end surface 10c constituting a boundary between the first column portion 11 and the second column portion 12 to clamp the elastic member 30C. Therefore, the jig 1C for manufacturing a fiber-reinforced resin cylinder can reduce the tiny gap generated between the metal cylinder part 50 and the elastic part 30 and the tiny gap generated between the core shaft 10C and the elastic part 30C by compressing the elastic part 30C in the axial direction and deforming the elastic part 30C in the radial direction, thereby more appropriately preventing the resin 44 from penetrating into these gaps.

[0060] <Fourth embodiment> Next, a clip according to a fourth embodiment of the present invention will be described, focusing on differences from the clip 1C according to the third embodiment.

[0061] like Figure 16 and Figure 17 As shown, a jig 1D according to a third embodiment of the present invention includes a first mandrel 10D in place of the first mandrel 10A. In the first mandrel 10D, the outer peripheral surface of the second column portion 12 (at least the end portion on the third column portion 21 side, and in this embodiment, the entire axial direction) forms a tapered surface (tapered portion 12a) that decreases in diameter as it approaches the third column portion 21.

[0062] In the jig 1D for manufacturing a fiber-reinforced resin cylinder according to the fourth embodiment of the present invention, the end portion on the third column portion 21 side of the outer peripheral surface of the second column portion 12 is configured as a tapered surface (tapered portion 12a) that decreases in diameter as it approaches the third column portion 21. According to the jig 1D for manufacturing a fiber-reinforced resin cylinder, the elastic component 30C, which is compressed axially by being arranged on the second end face 20a of the second core shaft 20C, is further compressed by the conical surface, thereby reducing the tiny gap generated between the elastic component 30C and the second column portion 12 and the tiny gap generated between the elastic component 30C and the metal cylinder 50, thereby suppressing the resin 44 from penetrating into these gaps. Therefore, the jig 1D for manufacturing a fiber-reinforced resin cylindrical body can prevent the generation and embedment of resin residues, and facilitates attachment and detachment of the first mandrel 10D to the fiber-reinforced resin cylindrical body 2 .

[0063] The above describes the embodiment of the present invention, but the present invention is not limited to the embodiment described above and can be appropriately deformed within the scope of the main purpose of the present invention. For example, each carbon fiber layer 41 to 43 can also present a so-called curled structure woven together. In addition, as a modification, the fiber body is not limited to carbon fiber, as long as it is a fiber component that can reinforce the resin layer (for example, glass fiber, cellulose fiber, etc.). In addition, the fourth column portion can be provided on the side of the first core shaft 10A, 10D, and the recess can be provided on the side of the second core shaft 20A, 20B, 20C. In addition, the metal tube component 50 can be a structure that is fixed only to the axial end 30b of one side of the fiber-reinforced resin tube component 40. In this case, the metal column component can be fixed to the axial end of the other side (presenting the same inner diameter and outer diameter as the axial middle portion 30a). In addition, the first embodiment to the fourth embodiment can be appropriately combined. [Explanation of Reference Numerals]

[0064] 1: A fixture for manufacturing fiber-reinforced resin cylinders; 2: Fiber reinforced resin cylinder; 10A, 10D: first spindle; 10a: concave part; 11: first column; 12: second column; 20A, 20B, 20C: second spindle; 21: third column; 22: Fourth column; 30A, 30B, 30C: elastic member; 40: Fiber reinforced resin cylinder parts; 50: Metal cylinder parts

Claims

1. A fiber-reinforced resin cylinder, characterized in that: It has a fiber-reinforced resin cylinder component and a metal cylinder component, wherein The metal tube member is fixed to the inner peripheral surface of the end portion of the fiber-reinforced resin tube member. The inner diameter of the metal tube member is larger than the inner diameter of the fiber-reinforced resin tube member.

2. The fiber-reinforced resin cylinder according to claim 1, characterized in that: The fiber-reinforced resin cylinder component is integrally molded with the metal cylinder component by the MFW process and the RTM process.

3. A method for manufacturing a fiber-reinforced resin cylinder, characterized in that: include: a step of fitting the second column portion of a first mandrel having a first column portion and a second column portion with a portion of a cylindrical elastic member, wherein the second column portion extends axially from an end portion of the first column portion and has a smaller diameter than the first column portion; a step of fitting the elastic member and the metal cylindrical member to each other in such a manner that the metal cylindrical member is located radially outward; a step of engaging another portion of the elastic member with a second cylindrical mandrel; forming a fiber-reinforced resin tubular member on the outer peripheral surfaces of the first mandrel and the metal tubular member; and a step of separating the first mandrel, the elastic member, and the second mandrel from the fiber-reinforced resin tubular member and the metal tubular member.

4. A jig for manufacturing a fiber-reinforced resin cylinder, characterized in that: It has a first mandrel, a second mandrel and a cylindrical elastic member, wherein The first mandrel includes: a first column portion having fibers arranged on an outer peripheral surface thereof; and The second column portion is axially extended from the end of the first column portion and has a smaller diameter than the first column portion. The second spindle has a third column portion coaxially arranged with the second column portion and extending in a direction away from the first column portion. The elastic member is fitted with the second column portion and the third column portion, and has an outer diameter larger than an outer diameter of the first column portion.

5. The jig for manufacturing a fiber-reinforced resin cylinder according to claim 4, wherein: The outer diameter of the third column portion is larger than the inner diameter of the elastic member.

6. The jig for manufacturing a fiber-reinforced resin cylinder according to claim 4, wherein: The second mandrel has a second end surface that sandwiches the elastic member in cooperation with a first end surface constituting a boundary between the first column portion and the second column portion.

7. The jig for manufacturing a fiber-reinforced resin cylindrical body according to claim 5, wherein: An end portion of the outer peripheral surface of the third column portion on the second column portion side is configured as a tapered surface whose diameter decreases as it approaches the second column portion.

8. The jig for manufacturing a fiber-reinforced resin cylindrical body according to any one of claims 4 to 7, wherein: One of the first mandrel and the second mandrel includes a fourth column portion, and the fourth column portion is inserted into a recess formed in the other of the first mandrel and the second mandrel.

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