JP3456113B2 - Manufacturing method and jig for three-dimensional fiber structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a jig for producing a three-dimensional fiber structure, and more specifically, a laminated yarn group having at least biaxial orientation formed by laminating a plurality of yarn layers, and each yarn layer. The present invention relates to a method for manufacturing a three-dimensional fiber structure that is formed in a shape having a curved surface portion and includes a thickness direction thread that is arranged in a direction orthogonal to each other and that joins the laminated thread groups, and a jig suitable for the manufacture.

[0002]

Fiber reinforced composites are widely used as lightweight structural materials. There is a three-dimensional woven fabric (three-dimensional fiber structure) as a reinforcing base material for a composite material. A composite material in which a resin or an inorganic material is used as a matrix with the three-dimensional woven fabric as a skeleton material is expected to be widely used as a structural material for rockets, aircrafts, automobiles, ships and buildings.

As a method for producing a three-dimensional fiber structure, a method of forming a laminated yarn group by laminating a plurality of yarn layers formed by arranging the yarns while folding the yarns and joining the yarn layers by the yarns arranged in the thickness direction. There is. For example, Japanese Patent Laid-Open No. 61-20106
In the method disclosed in Japanese Patent No. 3, a large number of yarn guide tubes are vertically arranged on the base plate at predetermined intervals. Then, using the thread guide tube as a guide, the threads are arranged in the longitudinal direction of the base plate in a folded manner to form a thread layer, and the threads are arranged in a transverse direction in a folded manner to form the thread layer, and in a diagonal direction. The operation of forming the yarn layers by arranging them in a folded shape is sequentially performed to form a laminated yarn group including a predetermined number of yarn layers. Next, a hooking tool is inserted into the thread guide tube, the thread guide tube is pulled out, the caulking thread supplied below the laminated thread group is pulled up to above the laminated thread group by the hooking tool, and the bar thread is passed through the loop portion of the caulking thread. Then, the caulking thread is pulled back downward to loosen the caulking thread and the laminated thread group is tightened. This operation is sequentially repeated for the number of yarn guide tubes to bond the laminated yarn group with the caulking yarn.

Further, in Japanese Patent Laid-Open No. 6-184906, when a fiber structure (three-dimensional fiber structure) in which ends of two or more plate parts are adjacent to each other at an angle is manufactured, A method is disclosed that does not use a base plate in which guide pins are erected on the entire surface of the arrangement location. For example, when manufacturing a three-dimensional fiber structure having an L-shaped cross section by this method, an L-shaped frame body in which a large number of guide pins are planted so as to be able to be extracted at a predetermined pitch is used. A yarn is hooked on a guide pin and arranged so as to be folded back, and a predetermined number of yarn layers having different yarn arrangement directions are laminated to form a laminated yarn group. Next, a large number of press plates having a width slightly narrower than the spacing between the guide pins are arranged on both front and back surfaces of the laminated yarn group, and they are pressed by a pressing device. With this compressed state maintained, only one press plate is used on the front and back sides.
The pieces are removed as one set, and the thickness direction threads are sewn together by caulking the laminated thread group by a chain stitch method using a spatula needle to join them. A perforation needle is integrally fixed to a support member to which a spatula needle is attached, and a hole is made by the perforation needle at a position where the spatula needle is inserted.

Further, in JP-A-8-218249, etc., instead of arranging guide pins upright on the entire surface where the yarns are arranged, the pins have a predetermined pitch so as to surround a region corresponding to the yarn insertion region in the thickness direction. After forming a laminated yarn group by laminating a plurality of yarn layers arranged in a folded manner between the pins on the frame body arranged in, the plurality of yarns arranged in a line are held in a state where the laminated yarn group is held in the frame body. A method of inserting a thickness direction thread using a thickness direction thread insertion needle is disclosed.

[0006]

The strength of a composite material having a three-dimensional fiber structure as a skeletal material is greatly affected by the three-dimensional fiber structure, and in order to obtain a composite material having high strength, the shape of the composite material is required. It is necessary to use the three-dimensional fibrous structure having the above shape as the skeletal material. Therefore, the three-dimensional fiber structure is not limited to a flat plate or a combination of flat plates, and a three-dimensional fiber structure having a curved surface portion is also required.

According to Japanese Patent Laid-Open No. 61-201063, by changing the shape of the base plate, a three-dimensional fibrous structure W having a cylindrical shape, a truncated cone shape, or a dome shape as shown in FIG. 17 can be obtained. It is disclosed. However, in the conventional manufacturing method in which the yarns are arranged in a state where a large number of pins or yarn guide tubes are erected on the entire yarn arranging surface and then the thickness direction yarns are inserted into the erected positions of the pins or the like, To obtain a three-dimensional fiber structure, the pin pitch is about several mm. The number of pins erected on the base plate is in the range of several thousands to tens of thousands, and it takes time to erect the pins and insert the thickness direction thread into the base plate, and it takes time to manufacture the three-dimensional fiber structure.

On the other hand, in the method disclosed in Japanese Patent Application Laid-Open No. 6-184906, it is not necessary to stand the pins on the entire yarn arrangement surface. However, in order to combine the laminated yarn groups with the thickness direction yarns, while pressing the front and back surfaces of the laminated yarn group with a large number of press plates and maintaining the compressed state, only one press plate is removed and the thickness direction yarns are It is necessary to insert and the work is troublesome. In other words, the structure of the press device in which the press plate can be detached from only one place with the front and back two as a set becomes complicated while maintaining the laminated yarn group in a compressed state with a large number of press plates having a width narrower than the spacing between the guide pins. Further, since the entire surface of the laminated yarn group is maintained in a compressed state at the same time, a large compressive force is required, which causes a problem that the device becomes large. Also,
In the case of a polyhedron in which the shape of the three-dimensional fiber structure is a combination of a plurality of flat plates, or a shape having a curved surface portion with a constant curvature such as a cylinder, the type of press plate may be small, but a curved surface portion with a varying curvature In the case of the shape to have, it is necessary to prepare many kinds of press plates. Furthermore, after the three-dimensional fibrous structure is formed, the frame body can be extracted from the three-dimensional fibrous structure. Limited to shapes that simply increase. As a result, it is not possible to manufacture a shape in which the diameter of the intermediate portion is large, or a shape in which the flange portion bent inward is present at the extraction side end portion.

Further, in the method disclosed in Japanese Unexamined Patent Publication No. 8-218249, since the yarns in the thickness direction are inserted one by one, the method disclosed in Japanese Unexamined Patent Publication No. 6-184906 is performed one by one. In comparison, the productivity of the three-dimensional fiber structure is improved. However, the shape of the obtained three-dimensional fiber structure is
There are the same restrictions as those disclosed in Japanese Patent Laid-Open No. 6-184906.

The present invention has been made in view of the above problems, and an object thereof is to form a laminated yarn group having at least biaxial orientation formed by laminating a plurality of yarn layers and orthogonal to each yarn layer. It is possible to form a three-dimensional fibrous structure formed by the thickness direction yarns that are arranged in the direction and connect each yarn layer, regardless of the curvature of the curved surface portion and the position of the bent portion. It is an object of the present invention to provide a method for manufacturing a three-dimensional fiber structure that simplifies work and a jig suitable for the method.

[0011]

In order to achieve the above-mentioned object, in the invention according to claim 1, at least biaxially oriented laminated yarn group formed by laminating a plurality of yarn layers, and each yarn layer, A method for producing a three-dimensional fibrous structure that is formed in a shape having a curved surface portion, including a thickness direction thread that is arranged in an orthogonal direction and that joins the laminated thread groups, and corresponds to the shape of the three-dimensional fiber structure. After forming a laminated yarn group having at least biaxial orientation by laminating a plurality of yarn layers on a jig that can support the laminated yarn group in a state of being supported and can be partially disassembled while supporting the laminated yarn group, While holding the laminated yarn group in the jig, part of the jig is partially disassembled from the inside of the laminated yarn group, and the thickness direction yarn is inserted in the region of the laminated yarn group corresponding to the decomposed portion. After tightening the laminated thread group, reassemble the disassembled part Next, another position of the jig is disassembled, the thickness direction thread is inserted into the area of the laminated thread group corresponding to that portion, and the operation of tightening the laminated thread group is repeated to insert the thickness direction thread of the laminated thread group. The thickness direction thread is inserted into the entire area requiring the above, the laminated thread groups are combined to form a three-dimensional fiber structure, and then the jig is disassembled from the inside of the three-dimensional fiber structure and removed. did.

According to a second aspect of the invention, in the first aspect of the invention, the laminated yarn group is formed by placing a plurality of cloths on the outside of the jig. Claim 3
In the invention according to claim 1, in the invention according to claim 1, the jig has a frame body in which pins are arranged at a predetermined pitch so as to surround a region corresponding to a thickness direction thread insertion region, The thread group is composed of a plurality of thread layers formed by arranging the threads in a folded shape between the pins.

According to a fourth aspect of the invention, a thread is folded between the pins on a frame body having an outer shape corresponding to the shape of the three-dimensional fiber structure and having a large number of pins mounted at a predetermined pitch. And a plurality of yarn layers are laminated to form a laminated yarn group having at least biaxial orientation, and the laminated yarn group formed on the frame is arranged in a thickness direction yarn arranged in a direction intersecting each yarn layer. A jig used in a method for manufacturing a three-dimensional fiber structure that is connected by a method, which is arranged at a position corresponding to the curved surface part of the three-dimensional fiber structure, and a large number of pins can be detached at least at its corners at a predetermined pitch. A plurality of first curved surface portion supporting members, a second curved surface portion supporting member arranged at a position corresponding to the curved surface portion other than the corner portion, and each of the first and second curved surface portion supporting members. Support a large number of Includes a plurality of base frames detachably fixed at positions corresponding to at least the peripheral edge of the laminated yarn group, and a bracket for fixing a part of the base frame so as to be disassembled and assembled from the inside of the laminated yarn group. .

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the base frames are arranged in parallel with each other, and a pair of substrates having curved portions and brackets for the both substrates are provided. And a plurality of support members each having an engaging recess formed on the outer side, and the first curved surface portion support member is arranged at a position corresponding to both end portions of the support member, and has a large number of restrictions. A support bar to which a pin is detachably fixed, wherein the second curved surface supporting member is supported in parallel with the supporting bar in a state of being engaged with the engaging concave portion with respect to the supporting member. A bar, which is a bar, and is provided with a reference pin that is detachably fixed to a predetermined position inside the regulation pin on both the substrates.

According to the first aspect of the invention, a plurality of yarn layers are laminated on the jig capable of holding the shape of the three-dimensional fiber structure to form a laminated yarn group having at least biaxial orientation. Next, a thickness direction thread that tightens the laminated yarn group is inserted into the laminated yarn group. At that time, a part of the jig is partially disassembled from the inside of the laminated yarn group supported by the jig, and the thickness direction yarn is inserted into a region of the laminated yarn group corresponding to the decomposed part. After the laminated yarn group is clamped by the thickness direction yarn inserted in the region, the disassembled portion is reassembled. By repeating this operation, the thickness direction thread is inserted over the entire region where the thickness direction thread needs to be inserted, and the three-dimensional fiber structure is formed. After that, the jig is disassembled from the inside of the three-dimensional fiber structure and removed, and the production of the three-dimensional fiber structure is completed.

According to a second aspect of the invention, in the first aspect of the invention, the laminated yarn group is formed by placing a plurality of cloths on the outside of the jig. Therefore,
The formation of the laminated yarn group becomes easier as compared with the case where the yarns are arranged to form the yarn layer.

According to a third aspect of the present invention, in the first aspect of the present invention, the laminated yarn group is formed by a yarn arranged in a folded shape by engaging with a pin provided on a frame forming the jig. It is composed of a plurality of thread layers formed. Since each yarn layer is formed by arranging the yarns on the frame, when forming a three-dimensional fibrous structure having a curved surface portion whose curvature is not constant, as compared with the case where the cloth is arranged on the frame, It becomes easy to form a yarn layer corresponding to a desired shape.

The jig of the invention as defined in claim 4 is used for forming an array of at least biaxially oriented yarn groups and inserting thickness direction yarns into the yarn groups when producing a three-dimensional fiber structure. . The laminated yarn group is supported by the first and second curved surface portion supporting members by a plurality of yarn layers arranged in a folded shape in a state of being engaged with a large number of pins fixed to the base frame and the first curved surface portion supporting member. The formed state is formed into a shape corresponding to the shape of the three-dimensional fiber structure. When the thickness direction thread is inserted into the laminated thread group, a part of the curved surface supporting member or the base frame corresponding to the insertion area of the thickness direction thread is disassembled. Therefore, there is no fear that the curved surface supporting member or the base frame will interfere with the insertion of the thickness direction thread. After the insertion of the thickness direction yarns into all the regions requiring the insertion of the thickness direction yarns, the jig is disassembled from the inside of the three-dimensional fiber structure and removed.

When a three-dimensional fiber structure is produced by using the jig of the invention described in claim 5, a set of substrates arranged in parallel with each other is fixed to a reference pin fixed at a predetermined position and a support bar. The yarns are arranged in a folded shape in a state of being engaged with the regulated pins, and the yarn layers are sequentially laminated. Then, the laminated yarn group having a shape corresponding to the outer shape of the three-dimensional fiber structure is formed so as to be at least biaxially oriented.

The laminated yarn group is held in an outer shape corresponding to the shape of the three-dimensional fibrous structure by the substrate, the supporting member and the curved surface supporting members. Since the threads are arranged in a state of being engaged with the reference pin fixed to the portion corresponding to the peripheral edge of the pair of substrates and the regulation pin of the first curved surface portion supporting member arranged at the corner portion, the thread is a three-dimensional fiber. It is securely arranged at a predetermined position suitable for forming a thread layer corresponding to the shape of the tissue. When the thickness direction thread is inserted, the support member or the curved surface portion support member at a position corresponding to the thickness direction thread insertion region is temporarily removed, so that each support member interferes with the insertion of the thickness direction thread. There is no fear. Since the second curved surface portion support member is supported by the support member in a state of being engaged with the engagement concave portion, disassembly and assembly are facilitated.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is embodied in the production of a three-dimensional fiber structure used as a frame material of a fiber-reinforced composite material for a leading edge of an aircraft is shown in FIG. ~ It demonstrates according to FIG.

First, the structure of a jig used for producing a three-dimensional fiber structure will be described. This jig is used for arranging the laminated yarn groups corresponding to the shape of the three-dimensional fiber structure and for holding the laminated yarn groups when inserting the thickness direction yarns into the arranged laminated yarn groups.

As shown in FIGS. 1 and 2, the jig 1 includes a pair of substrates 2 and 3 arranged in parallel with each other.
Both substrates 2 and 3 are formed in an outer shape corresponding to the cross-sectional shape of the leading edge, that is, in a substantially triangular plate shape surrounded by a parabola and a straight line, and holes 2a and 3a are formed in the centers.
A plurality of columns 4 (7 in this embodiment) are provided between the two substrates 2 and 3 as support members. Each prop 4
Is fixed to the substrates 2 and 3 via a bracket 5 so as to be removable from the inside. Bracket 5 is screw 5a
It is fixed to the substrates 2 and 3 and the column 4. Each of the columns 4 is formed to be curved so as to be convex outward. An engagement recess 4a is formed at a predetermined position on the outside of each of the columns 4. A base frame is composed of the substrates 2 and 3 and the columns 4.

As shown in FIG. 2, stepped portions 2c and 3c are formed on the substrates 2 and 3 along the outer peripheral edge thereof, and a plurality of support plates 6 are provided in a state of engaging with the stepped portions 2c and 3c. It is arranged along the outer peripheral edges of a few. A support bar 7 as a first curved surface support member is arranged at a position corresponding to both ends of the support column 4 so as to extend along the outer circumference of the substrates 2 and 3. The support bar 7 is arranged such that a part of the support bar 7 abuts on the column 4 and a part of the support bar 7 abuts on the tip of the support plate 6,
Both ends thereof are fixed to the column 4 with adhesive tape or the like not shown. A curved surface forming bar 8 serving as a second curved surface portion supporting member is supported at an intermediate portion of the support column 4 in a state of being engaged with the engagement concave portion 4a. The curved surface forming bar 8 plays a role of maintaining the shape of the three-dimensional fiber structure in cooperation with the support column 4.

A large number of restriction pins 9a are detachably fixed to the support bar 7 at a predetermined pitch. Each regulation pin 9
a is fixed to the substrates 2 and 3 so as to form an angle of about 45 °. A reference pin 9b is detachably fixed to the substrates 2 and 3 at a predetermined position corresponding to the inside of the regulation pin 9a. Further, the reference pins 9b are also detachably fixed at a predetermined pitch to the end portions of the support plate 6 provided at the positions corresponding to the base end portions (portions facing the curved portions) of the substrates 2 and 3. Further, the reference pins 9b are detachably fixed at a predetermined pitch also to the columns 4 arranged at the positions corresponding to the base end portions of the substrates 2 and 3.

Next, the laminated yarn group F formed on the jig 1
A three-dimensional fibrous structure manufacturing apparatus for manufacturing a three-dimensional fibrous structure by simultaneously inserting a plurality of thickness direction threads z (illustrated only in FIG. 7) into the above will be described.

FIG. 4 is a partially cutaway schematic side view of the manufacturing apparatus in which the jig 1 having the laminated yarn group F is attached, and FIG. 6 is a partially cutaway schematic plan view. As shown in FIGS. 4 and 6, the base plate 12 of the manufacturing apparatus 11
A pair of rails 12a is provided on the top so as to extend in the left-right direction (left-right direction in FIGS. 4 and 6), and the first support table 13 is slidably supported along the rails 12a. The rail 13a is provided on the support table 13
The second support table 14 is slidably supported along a rail 13a so as to extend in a state orthogonal to a. The first support table 13 is a ball screw mechanism 1 driven by a motor M1 supported on the base plate 12.
By means of 5, it is reciprocated along the rail 12a. The second support table 14 is a ball screw mechanism 1 driven by a motor M2 supported on the first support table 13.
6 reciprocates along the rail 13a. Servo motors are used for the motors M1 and M2.

The front side of the second support table 14 (see FIG. 4)
To the left) of the supporting portion 17 for rotatably supporting the jig 1.
Is provided. A bearing 18 is provided on the upper portion of the support portion 17, and a lower end of a support shaft 19 that supports the jig 1 is attached to the bearing 1.
It is rotatably supported via 8. Second support table 1
A support column 20 is provided upright on the rear side of the support 4, and a support arm 21 is rotatably supported at the base end of the support column 20 via a support shaft 22. A motor M3 having a drive shaft 23 to which the upper end of the support shaft 19 is connected is supported at the tip of the support arm 21. A servo motor is used as the motor M3. The support arm 21 has a drive shaft 23.
Is arranged at a predetermined position (position shown in FIG. 4) coaxially with the bearing 18, and is fixed by fixing means (not shown).

Support brackets 24a and 24b for supporting the jig 1 are detachably fixed to the support shaft 19. The first support bracket 24a supports the jig 1 on the substrates 2 and 3, and the second support bracket 24b supports the support 4
The jig 1 is supported at. The jig 1 is the support shaft 1.
The motor M3 is rotated integrally with the support shaft 19 while being supported by the motor 9.

As shown in FIG. 6, columns 25 extending vertically are provided opposite to each other at the front side of the base plate 12, and a pair of rails 26 are fixed to each column 25 so as to extend along the vertical direction. Has been done. Support members 27a and 27b are slidably supported on the columns 25, and the support members 27a and 27b are provided along the rails 26 by a ball screw mechanism 28 driven by a motor M4 provided on the columns 25. It is designed to be moved up and down. Each support member 27a, 27b is equipped with a ball nut (not shown) of a ball screw mechanism 28. A servomotor is used as the motor M4, and both motors M4 are driven in synchronization with each other so that the support members 27a and 27b are integrally moved up and down.

A rotary shaft 30 is rotatably supported by the first support member 27a via a bearing 29 in a horizontal state.
The motor M5 is supported by the second support member 27b, and the rotary shaft 31 is integrally rotatably connected to the drive shaft M5a of the motor M5. Both rotary shafts 30 and 31 are arranged coaxially. A support table 33, which supports the thickness direction thread insertion device 32, is supported on both rotary shafts 30 and 31 via a support arm 34. Therefore, the thickness direction thread insertion device 32 is arranged so as to be movable up and down with respect to the base plate 12 and relatively rotatable about the rotation shafts 30 and 31.

The thickness direction thread insertion device 32 is basically proposed by the applicant of the present invention (Japanese Patent Laid-Open No. 8-218249, etc.).
The device is configured similarly to the above device. As shown in FIGS. 5 and 7, the support table 33 includes a pair of brackets 35.
(Only one is shown) is erected, and a pair of guide rods 36 are provided between both brackets 35 in parallel with the rotating shafts 30 and 31. A support plate 37 is provided on the guide rod 36.
Is slidably supported, and the support plate 37 is capable of reciprocating a predetermined distance by the operation of an air cylinder 38 fixed to the bracket 35.

A pair of support brackets 39 are erected on the front and rear ends of the support plate 37, and the movable body 4 is provided along a pair of upper and lower guide rods 40 provided on the support bracket 39.
1 is slidably supported. A ball nut 43 that is screwed into a ball screw 42 that passes through both support brackets 39 is fixed to the moving body 41. A needle support 44 is fixed to the front end of the moving body 41, and thickness direction thread insertion needles (hereinafter, simply referred to as insertion needles) 45 are fixed to the front portion of the needle support 44 in one row at a predetermined pitch. The needle support 44 is arranged so as to pass through a hole (not shown) formed in the support bracket 39 on the front side (the side facing the support shaft 19).

As shown in FIG. 7, a drive motor 47 is fixed to the support bracket 39 via a support plate 46a and a bracket 46b. The drive motor 47 is configured to be rotatable in forward and reverse directions, and rotates the ball screw 42 via the belt transmission mechanism 48. By the operation of the drive motor 47, the needle support 44 causes the insertion needle 45 to be in a standby position where the insertion needle 45 cannot engage with the laminated yarn group F held by the jig 1 and the needle hole (not shown) is opposite to the laminated yarn group F. It is moved to a working position where it passes through the laminated yarn group F to a position on the side. The stroke of the needle support body 44 is set so that the insertion needle 45 is located on the central axis of the rotary shafts 30 and 31 in the working position.

A pair of upper and lower support rods 49 are slidably supported on the support bracket 39 in a state of penetrating the support bracket 39, and the front end sides of both support rods 49 are a connecting plate 50.
Are connected to each other via. An air cylinder 51 is horizontally fixed to the support bracket 39 via the bracket so as to extend in the front-rear direction.
The connecting plate 50 is connected to a. A perforation needle support 52 is fixed to the connecting plate 50, and perforation needles 53 are fixed to the perforation needle support 52 in one row at a predetermined pitch corresponding to the insertion needle 45. The row of the piercing needles 53 is arranged in parallel with the row of the inserting needles 45 at an interval equal to the moving distance of the support plate 37 when the air cylinder 38 is operated. By the operation of the air cylinder 51, the piercing needle support 52 is moved to a standby position where the piercing needle 53 cannot engage with the laminated yarn group F held by the jig 1 and an operating position where the piercing needle 53 penetrates the laminated yarn group F.

As shown in FIGS. 6 and 7, an air cylinder 54 is horizontally arranged on the support table 33 so as to extend in the front-rear direction, and a press plate 56 is attached to the tip of a piston rod 54a thereof via a bracket 55. Is fixed. The air cylinder 54 is arranged at a position where it does not interfere with the support plate 37. The press plate 56 includes a support portion having an L-shaped cross section that extends along the arrangement direction of the 45 rows of insertion needles, and a comb tooth portion integrally formed with the support portion. The press plate 56 can press the laminated yarn group F while sandwiching the insertion needles 45 or the punching needles 53 with comb teeth.

The press plate 56 is arranged on the standby position side of the insertion needle 45 and the punching needle 53 with respect to the laminated yarn group F held by the jig 1, and in the vicinity of the insertion position of the insertion needle 45 row, the insertion needle 45 row It is arranged so as to be movable along the moving direction. The press plate 5 is activated by the operation of the air cylinder 54.
6 is moved to an operating position where it engages the laminated yarn group F held by the jig 1 to press the laminated yarn group F toward the forward side of the 45 rows of insertion needles, and a standby position where it cannot engage with the laminated yarn group F. .

A guide portion 5 for guiding the thickness direction thread z fed from a thickness direction thread supply section (not shown) to the rotating shaft 30.
7 is provided. As shown in FIGS. 8 and 9, the guide portion 57 includes a pair of substantially semicircular support plates 58 fixed integrally rotatably to the rotary shaft 30, and a support rod 59 fixed between the support plates 58. And a large number of arc-shaped separation plates 60 fixed to the support rod 59 at a predetermined pitch. The separation plate 60 is arranged so as to be convex downward when the support plate 37 is arranged horizontally. Further, a support bar 61 is fixed to both the support plates 58 on the side opposite to the mounting side of the separation plate 60, and a plurality of guide rollers 62 are supported on the support bar 61. The guide roller 62 is rotatably supported by a support shaft 63 fixed so as to extend toward the center of the rotation shaft 30.

As shown in FIGS. 4 to 7, the support bracket 39 includes a bracket 6 extending on the side opposite to the needle support 44.
4 is fixed, and the bracket 64 is provided with a thread guide 65. The thread guide 65 includes four support rods 66 provided so as to extend in a direction orthogonal to the ball screw 42.
And a guide roller 67 rotatably supported by each support rod 66. A bracket 68 is provided so as to project on the support table 33, and a thread guide 69 is provided on the bracket 68. The thread guide 69 includes two support rods 66 and a guide roller 67 rotatably supported by each support rod 66. Then, the thickness direction thread z fed from the thickness direction thread supply section is first guided to the guide section 57 and then supplied to the insertion needle 45 via the thread guide 69 and the thread guide 65.

The motors M1 to M5, the drive motor 47, and the air cylinders 38, 51, 54 are controlled in a predetermined order by a controller (not shown), and the thickness direction yarn z of the laminated yarn group F supported by the jig 1 is controlled. The insertion needle 45 is reciprocally moved so as to be inserted vertically with respect to the insertion position.

Next, the operation of the device configured as described above will be described. In this embodiment, an angle (arrangement angle) formed by the arrangement direction of the yarns forming the laminated yarn group F with respect to the reference direction is set to 0 ° and ± 60 °, which is an in-plane triaxial structure. The arrangement direction of the threads is based on the direction extending in parallel with the support column 4 of the jig 1. When forming a yarn layer of the first in-plane array yarn y having an array angle of 0 °, as shown in FIG. 10, with the end portion of the in-plane array yarn y fixed to the substrate 3, The array yarn y is arranged so as to be folded back in a state of being engaged with the reference pin 9b so as to extend substantially parallel to the support column 4.

When forming the yarn layer of the bias yarn B as the second in-plane arranged yarn having an arrangement angle of + 60 °, the yarn B is formed.
With the end portion of the base plate 3 fixed to the substrate 3, first, it is folded back so as to engage with the reference pin 9b fixed to the base plate 3 and the support plate 6, and then, as shown in FIG. It is arranged so as to be folded back in a state of engaging with the fixed reference pin 9b and to form an angle of approximately 60 ° with the support column 4. In the jig 1 according to this embodiment, the bias yarns B are arranged so as to be folded back in such a manner that the reference pins 9b fixed to the support columns 4 are engaged with each other by two, so that the bias yarn B forms an angle of about 60 ° with the support columns 4. Arranged to form an angle. Prop 4
After the turning back of the reference pin 9b fixed to is completed, the reference pin 9b is arranged so as to form an angle of approximately 60 ° with the support column 4 in a state of engaging with the reference pin 9b of the substrates 2 and 3, and thereafter,
The support 4 and the reference pin 9b fixed to the base plate 2 on the opposite side are folded in a state of being engaged with each other, and the support pin 4 is approximately 60 °.
Are arranged so as to form an angle. The bias yarn B is bent at a position corresponding to the support bar 7 and arranged so as to extend obliquely. By engaging with the restriction pin 9a fixed to the support bar 7, the bias yarn B is regularly arranged at a predetermined position. Arranged.

When forming a yarn layer of the bias yarn B having an arrangement angle of −60 °, first, the end portion of the bias yarn B is fixed to the substrate 2 and then fixed to the substrate 2 and the support plate 6. It is folded back in a state of engaging with the reference pin 9b, and then folded back in a state of engaging with the reference pin 9b fixed to the support column 4 and the substrate 2, and arranged so as to form an angle of approximately −60 ° with the support column 4. It Hereinafter, the arrangement angle is +60
Basically, the bias yarns B are arranged in the same manner as the arrangement of the bias yarns B.

The arrangement work of the in-plane arrangement yarn y and the bias yarn B is performed manually or by a device in which an arm of a multi-axis robot is equipped with a yarn supply section. The yarn layers are laminated on the jig 1 in a predetermined order and in a predetermined number.
As shown in FIG. In order to increase the density of the laminated yarn group F and adjust the thickness thereof, the yarn layer is pressed from above by a press plate (not shown) every time the arrangement of each yarn layer is completed or every time when an appropriate yarn layer is formed. ) May be pressed to compress the laminated yarn group F. Various materials such as carbon fiber, glass fiber, and polyaramid fiber are used as the material of the fibers forming the in-plane array yarn y, the bias yarn B, and the thickness direction yarn z, depending on the application of the composite material.

Next, the jig 1 together with the laminated yarn group F is attached to the support shaft 19 of the manufacturing apparatus 11 on the support brackets 24a and 24b.
Fixed through. Then, FIG. 12 (a) and FIG.
As shown in (a), the manufacturing apparatus 11 is driven from the state where the lower side surface of the jig 1 faces the insertion needle 45 and the laminated yarn group F
The thickness direction thread z is inserted into the. When inserting the thickness direction thread z,
First, the piercing needle 53 is arranged at a position facing the thickness direction yarn insertion position of the laminated yarn group F, the air cylinder 54 is operated in this state, and the press plate 56 is arranged at the operating position. The press plate 56 holds the laminated yarn group F in a pressed state at a position corresponding to the row 53 of piercing needles. In this state, the air cylinder 51 is projected to operate, and the punching needle 53
Is moved forward and the piercing needle 53 is placed at an operating position where it penetrates the laminated yarn group F, and then the air cylinder 51 is retracted to retract the piercing needle 53. Since the fibers forming the laminated yarn group F are densely arranged to some extent by the compression action of the press plate 56, holes are formed in the traces of the punching needle 53.

Next, the air cylinder 38 is operated to project so that the row of perforation needles 53 and the row of insertion needles 45 are moved together with the support plate 37, and the row of insertion needles 45 is arranged at a position facing the hole. Next, the drive motor 47 is operated to operate the ball screw 42.
Is driven to rotate in the normal direction, and the insertion needle 45 advances and is placed at the working position. The insertion needle 45 is inserted into the laminated yarn group F until the needle hole appears in front of the laminated yarn group F. After the insertion needle 45 reaches the forward end, the drive motor 47 is reversely rotated and the insertion needle 45 is slightly retracted. As a result, the thickness direction thread z from the laminated thread group F to the needle hole is in a state of forming a loop that allows passage of a slip-off prevention thread needle (not shown).

Next, a retaining thread is inserted into the loop using a retaining thread needle. After that, the drive motor 47 is rotated in the reverse direction so that the insertion needle 45 retracts, is separated from the laminated yarn group F, and is placed at the standby position. In this state, the thickness direction thread z is pulled back by the action of the tension adjusting portion (not shown), and the thickness direction thread z inserted into the laminated thread group F is tightened in a state where the thickness direction thread z is retained by the retaining thread. Next, the air cylinder 38
Is operated, the row 53 of piercing needles and the row 45 of insertion needles are moved together with the support plate 37 and returned to the initial position. Further, the air cylinder 54 is operated to activate the press plate 56.
Is placed in the standby position. From the above, the thickness direction thread z is 1
The insert cycle is completed.

Next, the motor M2 is driven to move the second support table 14 by the insertion pitch of the thickness direction thread z, and the piercing needle 53 faces the next thickness direction thread insertion position into the laminated thread group F. It becomes a state. Thereafter, the insertion cycle of the thickness direction thread z is sequentially executed in the same manner as described above. And in FIG.
As shown in (b), after the second support table 14 is moved to a position where the insertion of the thickness direction thread z into the linear portion on one side surface side of the laminated thread group F is completed, the thickness direction thread z is then moved. The motor M3 is driven each time each insertion cycle of
The jig 1 is rotated about the support shaft 19 by a predetermined angle. Further, the motors M1 and M2 are driven to move the second support table 14 in the X direction (horizontal direction in FIG. 13B) and the Y direction (vertical direction in FIG. 13B). Then, FIG. 14 (a), FIG. 14 (b), FIG. 15 (a) and FIG.
As shown in (b), the thickness direction thread z is sequentially inserted up to the position where the insertion of the thickness direction thread z into the curved surface portion of the laminated thread group F is completed. Next, the motor M2 is driven every time each insertion cycle of the thickness direction thread z is completed up to a position where the insertion of the thickness direction thread z into the linear portion on the other side surface of the laminated thread group F is completed. The second support table 14 is moved downward in FIG. 15B by the pitch of insertion of the thread z in the thickness direction.

When the support column 6, the support plate 6, the support bar 7 and the curved surface forming bar 8 constituting the jig 1 interfere with the insertion needle 45 when the thickness direction thread z is inserted, the support column 4 in the corresponding region, Support plate 6, support bar 7 and curved surface forming bar 8
The thickness direction thread z is inserted in the state where the yarn is temporarily removed, and then the yarn is attached to the original position again.

As shown in FIG. 12A, when the insertion of the thickness direction thread z into the portion corresponding to the lower part of the side surface of the laminated thread group F is completed, the motor M4 is driven to raise the support table 33 by a predetermined amount. At the same time, the motor M5 is driven to rotate the rotary shafts 30 and 31 by a predetermined amount. And the insertion needle 4
5 is arranged at a position orthogonal to the laminated yarn group F at the thickness direction yarn insertion position above the position of FIG. 12 (a). The second supporting table 14 also has the insertion needle 45 and the laminated yarn group F.
The position is adjusted so that the distance between and becomes a predetermined value. Then, in that state, the thickness direction thread z is inserted into the side surface of the laminated thread group F as described above. Hereinafter, every time the insertion of the thickness direction thread z into the side surface of the laminated thread group F at that height is completed,
The thickness direction thread insertion device 32 is driven by driving the motors M4 and M5.
Is moved up and the position of the second support table 14 is adjusted.

Then, as shown in FIG. 12 (b), when the insertion of the thickness direction thread z into the uppermost portion of the side surface of the laminated thread group F is completed, the thickness direction thread insertion device 32 is moved to the state shown in FIG. 12 (c). As shown, the laminated yarn group F is moved to the insertion position of the thickness direction yarn z in the upper flange portion. In that state, the thickness direction thread z is inserted, and after the insertion of the thickness direction thread z into the upper flange portion of the laminated thread group F is completed, the motors M4 and M5 are driven in reverse to drive the thickness direction thread insertion device. 32 is moved to the insertion position of the thickness direction thread z into the lower flange portion of the laminated thread group F. When the insertion of the thickness direction thread z into the lower flange portion is completed, the insertion of the thickness direction thread z into the entire thickness direction thread insertion area of the laminated thread group F is completed, and the three-dimensional fiber structure W is completed. Then, after the restriction pins 9a and the reference pins 9b are removed from the jig 1, the jig 1 is disassembled from the inside of the three-dimensional fiber structure W,
The production of the three-dimensional fiber structure W as shown in FIG. 3 is completed.

Since the three-dimensional fibrous structure W is provided with a flange portion that is bent and formed inward, insertion of the retaining thread is easier by hand. However, automation is also possible by using curved needles and inserting them sequentially through the loop of the thickness thread z. Also, near the corner,
That is, when the thickness direction thread z is inserted at the positions shown in FIGS. 12A to 12C, the thickness direction thread z and another retaining thread may be inserted into the loop of the thickness direction thread z. difficult. In such a case, similarly to the case disclosed in Japanese Patent Laid-Open No. 8-218249, the thickness direction thread z inserted on the corner side is hooked by a slip-off prevention thread needle and the other thickness direction threads are hooked. By inserting the retaining thread through the loop of the thread z and using it as the retaining thread, the retaining thread can be easily inserted. In this case, the thickness direction thread z that also serves as the retaining thread needs to be fed independently from the other thickness direction threads z and supplied from a bobbin capable of rewinding.

This embodiment has the following effects. (B) The thickness direction yarn z is added to the laminated yarn group F held by the jig 1.
When inserting, the parts in the thickness direction are inserted in a state in which parts such as the support column 6 and the support plate 6 corresponding to the insertion region are disassembled from the inside of the laminated yarn group. Then, after the laminated yarn group is tightened by the thickness direction yarns inserted in the region, the disassembled support column 4, support plate 6 and the like are reassembled. Therefore, since the complicated curved surface shape is maintained, the thickness direction thread z can be inserted without any trouble even if a large number of columns 4 and support plates 6 are present. Further, since the disassembled parts are reassembled to form the jig 1,
The laminated yarn group F can be reliably held in a predetermined shape by the jig 1 until the production of the three-dimensional fiber structure W is completed. (B) Since the in-plane array yarn y and the bias yarn B are arrayed along the support plate 6 when the laminated yarn group F forming the flanges formed on both sides of the three-dimensional fiber structure W is arrayed, There is no risk that the yarn y and the bias yarn B will rise to the back side (inside). As a result, the flange portion can be formed flat with a desired thickness.

(C) The in-plane array yarn y in which the laminated yarn group F is arrayed substantially in parallel with the support column 4, and ± 6 with respect to the in-plane array yarn y.
The bias yarn B is arranged so as to form an angle of 0 °. Therefore, the yarns y and B can be securely placed at the predetermined positions without arranging the regulation pin 9a and the reference pin 9b in the region where the curved surfaces having different curvatures are continuously formed by the support column 4 and the curved surface forming bar 8. The jig 1 can be easily assembled and disassembled.

(D) Since the regulating pin 9a is arranged at a position corresponding to the corner portion (bent portion) of the three-dimensional fiber structure W, even when the bias yarn B is arranged diagonally across the corner portion, The bias yarn B can be surely arranged at a predetermined position without any displacement.

(E) Since the substrates 2 and 3 are not simple flat plates but are formed in a frame shape having holes 2a and 3a, when the jig 1 is fixed to the support shaft 19 of the manufacturing apparatus 11, Its installation becomes easy.

(Second Embodiment) Next, a second embodiment will be described with reference to FIG. This embodiment differs from the above-mentioned embodiments in that the jig 1 has a structure suitable for arranging and holding a laminated yarn group having an in-plane 4-axis structure. Specifically, the regulation pin 9a is detachably fixed to the support column 6 and the support column 6 arranged at the position corresponding to the portion of the jig 1 that is curved in a substantially U shape.

When this jig 1 is used, the laminated yarn group F has an in-plane array yarn y arranged substantially parallel to the support column 4 and an in-plane array yarn x arranged so as to be orthogonal to the in-plane array yarn y. And a bias yarn B as an in-plane array yarn arranged so as to intersect the in-plane array yarns x and y at an angle of ± 45 °,
It has a structure of four in-plane axes.

The in-plane array threads y are arrayed in the same manner as in the first embodiment, and the bias threads B are arrayed at an angle of 45 ° or -45 °. The in-plane array yarn x is the support plate 6
And the reference pin 9b and the regulation pin 9a fixed to the column 4.
Are arranged in parallel with the support bar 7 in a state of engaging with. Since the column 4 is curved so as to be convex outward,
When the in-plane array yarn x is arranged without the restriction pin 9a, the in-plane array yarn x is displaced along the support column 4, and it becomes difficult to arrange the in-plane array yarn x at a predetermined pitch. However, since the regulation pin 9a is arranged in the curved portion, the in-plane array yarn x engages with the regulation pin 9a and is arranged in parallel with the support bar 7.
The regulation pin 9a may be provided not only at the position corresponding to the U-shaped tip, but also at the columns 4 adjacent thereto or all of the columns 4.

Insertion of the thickness direction thread z into the laminated thread group F formed on the jig 1 is performed in the same manner as in the above embodiment. However, when the thickness direction thread z is inserted, the restriction pin 9a removed from the support column 4 or the support plate 6 for temporarily disassembling the support column 4 or the support plate 6 is
There is no need to install it in its original position. Even if the regulating pin 9a is not attached to the original position, the inserted thickness direction thread z prevents the arrangement of the threads x, y, B from being disturbed.

When the jig 1 of this embodiment is used, the in-plane four-axis laminated yarn group F is favorably arranged. In addition, since the manufactured three-dimensional fiber structure has an in-plane four-axis structure, the strength against pulling and compression in the direction orthogonal to the in-plane array yarn y is improved as compared with the three-dimensional fiber structure of the first embodiment.

The embodiment is not limited to the above, but may be embodied as follows, for example. The laminated yarn group F is formed by laminating cloth (cloth) instead of only the arrangement of the in-plane arranged yarns x and y and the bias yarn B. In the case of a cloth, one sheet constitutes two layers of yarn arrangement. For example, a plain weave cloth has substantially the same structure as a layer in which a yarn layer of in-plane arranged yarn x and a yarn layer of in-plane arranged yarn y are laminated. Further, when the plain weave cloths are stacked, if the yarns of one cloth cross each other at an angle of ± 45 °, the yarns of the in-plane arranged yarns x and y are biased. The structure is almost the same as the structure in which the thread layers of the thread B are laminated. The cloth is arranged so as to cover the yarn layer forming portion of the jig 1, and the peripheral portion of the cloth that does not become a product is fixed to the jig 1 with a fixing pin, an adhesive tape, an adhesive or the like to have a predetermined shape. Held in. In this case, the jig 1 does not require the regulation pin 9a or the reference pin 9b. When using the stop pin, the number is the control pin 9a.
And the number of reference pins 9b is much smaller than that of the jig 1
Assembly time is shortened. In addition, the formation time of the thread layer can be greatly shortened. However, the physical properties of the obtained composite material using the three-dimensional fiber structure as a reinforcing material (skeleton material) are as follows:
Although it is inferior to the one in which the laminated yarn group F is formed by the arrangement of y and the bias yarn B, it is effective for a structural material that does not require so much rigidity.

The laminated yarn group may be formed by combining the arrangement of yarns and the lamination of cloth. This structure is effective in forming a laminated yarn group in which the wall thickness is partially changed. For example, after laminating a required number of cloths, the substrates 2 and 3 and the support plate 6 at a portion corresponding to a portion where the wall thickness is increased.
Alternatively, the reference pin 9b is attached to the column 4, and the required number of thread layers are arranged at the relevant position.

The laminated yarn group F only needs to have at least in-plane biaxial orientation, and without the bias yarn B, the in-plane array yarn x,
In the in-plane biaxial orientation by y, or in the in-plane 4-axis orientation, the inclination angle of the bias yarn B forming the laminated yarn group F may be other than 45 °.

○ Not limited to the shape of the leading edge,
A cylinder as shown in FIG. 17A, a truncated cone as shown in FIG. 17B, or a dome-shaped rotating body as shown in FIG. 17C, and flange portions are formed at their bottoms or both ends. It may be applied to a three-dimensional fibrous structure having a curved surface such as a curved shape. No flange (a)
The shape of (c) can be manufactured by the method disclosed in Japanese Patent Laid-Open No. 61-201063, but the shape of (b) and (c) in which a flange portion is formed, or (a). In the case of the shape in which the flange portions are formed at both end portions of (b) and (b), it cannot be manufactured. However, by using a jig that can be disassembled and assembled from the inside, the three-dimensional fiber structure of those shapes can be formed in the same manner as in the first embodiment. Of course, a jig having a shape corresponding to the shape of the three-dimensional fiber structure is used.

The supporting plate 6 constituting the jig 1 is omitted, and the in-plane array yarns x and y and the bias yarn B are used for the substrate 2,
It may be configured to be supported by 3, the column 4, the support bar 7, and the curved surface forming bar 8. Further, the number of columns 4 and curved surface forming bars 8 arranged on the curved surface portion may be increased. When the number of them is increased, the shape of the curved surface portion of the laminated yarn group becomes smooth.

After the thickness direction yarn z is inserted into the laminated yarn group F to form the three-dimensional fiber structure W supported by the jig 1, the jig 1 is disassembled to form the three-dimensional fiber structure W. When removing from the jig 1, instead of removing the reference pins 9b located at the peripheral edge of the three-dimensional fiber structure W from the jig 1, the thread wound around these reference pins 9b is cut to remove the three-dimensional fiber structure W. The engagement between and the reference pin 9b may be released. Since the laminated yarn group F is clamped and fixed by the thickness direction yarn z, cutting the yarn engaging with the reference pin 9b does not adversely affect the physical properties of the three-dimensional fiber structure W. In this case, the effort of attaching and detaching the reference pin 9b is eliminated.

Depending on the thickness of the laminated yarn group F and the type of fiber, the insertion needle 45 may be directly inserted into the laminated yarn group F without punching with the piercing needle 53. The technical idea (invention) other than the claims that can be understood from the embodiment will be described below together with the effects thereof.

(1) The laminated yarn group has portions having different thicknesses, and a plurality of cloths are placed on the outside of the jig to form a laminated yarn group having a predetermined thickness. The three-dimensional structure according to claim 1, wherein the pins are attached to the jig in a state of penetrating the cloth so as to surround the non-existing region, and the yarns are arranged in a folded shape between the pins to form a yarn layer. Fibrous tissue manufacturing method. In this case, it becomes easy to arrange the laminated yarn group having the portions having different thicknesses.

(2) A plurality of first curved surface part supports which are jigs used in the method for producing a three-dimensional fiber structure according to claim 2 and which are arranged at positions corresponding to the curved surface parts of the three-dimensional fiber structure. A member, a second curved surface portion supporting member arranged at a position corresponding to the curved surface portion other than the corner portion, a plurality of base frames for supporting each of the first and second curved surface portion supporting members, and the base frame A jig equipped with a bracket that fixes a part of the yarn so that it can be disassembled and assembled from the inside of the laminated yarn group. This jig is effective when the laminated yarn group is formed only by the cloth.

(3) The first and second curved surface supporting members and the base frame are formed by combining crosspieces or bars.
Jig described in. In this case, disassembling and assembling are easier than in the case of combining and forming the plate materials.

[0072]

As described in detail above, the first to fifth aspects of the invention are described.
According to the invention described in (1), at least biaxially oriented laminated yarn groups formed by laminating a plurality of yarn layers, and thickness direction yarns arranged in a direction orthogonal to each yarn layer and connecting the laminated yarn groups. It is possible to form a three-dimensional fibrous tissue having a shape including a curved surface portion regardless of the curvature of the curved surface portion and the position of the bent portion, and the operation of inserting the thread in the thickness direction becomes easy.

According to the second aspect of the invention, the forming time of the laminated yarn group can be greatly shortened. Also, the structure and assembly of the jig are simplified. According to the invention described in claim 3, in the case of forming a three-dimensional fiber structure having a curved surface portion having a non-uniform curvature, as compared with the case where the cloth is arranged on the frame, the yarn layer corresponding to the desired shape is formed. Are easily formed.

The jig of the invention according to claim 4 is the jig according to claim 3.
It is suitable for the production of the three-dimensional fiber structure. The jig of the invention described in claim 5 is effective for producing a three-dimensional fiber structure for producing a composite material for a leading edge.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a jig according to a first embodiment.

FIG. 2 is a sectional view of the same.

FIG. 3 is a schematic perspective view of a three-dimensional fiber structure.

FIG. 4 is a side view, partly broken and partly omitted, showing a state in which a jig is attached to the manufacturing apparatus.

FIG. 5 is a side view in which the thickness direction thread insertion device is partially broken and partially omitted.

FIG. 6 is a partially cutaway partially omitted plan view showing a state in which a jig is attached to the manufacturing apparatus.

FIG. 7 is a partially cutaway partial plan view of the thickness direction thread insertion device.

FIG. 8 is a side view of the thread guide.

FIG. 9 is a plan view of the thread guide.

FIG. 10 is a schematic perspective view showing an arrangement state of in-plane arranged yarns.

FIG. 11 is a schematic perspective view showing an arrangement state of bias yarns.

FIG. 12 is a schematic side sectional view showing the inserting action of the thickness direction thread.

FIG. 13 is a schematic plan view showing the inserting operation of the thickness direction thread.

FIG. 14 is a schematic plan view showing the inserting action of the thickness direction thread.

FIG. 15 is a schematic plan view showing the inserting action of the thickness direction thread.

FIG. 16 is a schematic perspective view of a jig according to a second embodiment.

FIG. 17 is a schematic perspective view of a three-dimensional fiber structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Jig, 2, 3 ... Board | substrate which comprises a base frame, 4 ... Struts as a support member which comprises a base frame, 5 ... Bracket, 7 ... Support bar as a 1st curved surface support member, 8 ... 2nd Curved surface forming bar as a curved surface supporting member of 9a ... Regulating pin 9b
... reference pin, B ... bias yarn as in-plane array yarn, x,
y ... in-plane array yarn, z ... thickness direction yarn, F ... laminated yarn group, W ...
Three-dimensional fiber organization.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junji Takeuchi, 2-chome, Toyota-cho, Kariya-shi, Aichi Stock company, Toyota Industries Corporation (72) Inventor, Sayaya Suzuki 2-chome, Toyota-cho, Kariya-shi, Aichi Company Toyota Loom Works (56) Reference JP-A-8-218249 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D03D 41/00

Claims (5)

(57) [Claims] 1. A laminated yarn group that is formed by laminating a plurality of yarn layers and has at least biaxial orientation, and a thickness direction yarn that is arranged in a direction orthogonal to each yarn layer and that joins the laminated yarn groups, And a method for producing a three-dimensional fiber structure formed in a shape having a curved surface portion, wherein the laminated yarn group can be supported in a state corresponding to the shape of the three-dimensional fiber structure, and the laminated yarn group is partially supported in a supported state. At least 2 by stacking multiple thread layers on a jig that can be disassembled into
After forming the laminated yarn group having an axial orientation, while holding the laminated yarn group in the jig, a part of the jig is partially decomposed from the inside of the laminated yarn group, and the laminated part corresponding to the decomposed part is laminated. After inserting the thread in the thickness direction into the area of the thread group and tightening the laminated thread group, reassemble the disassembled part, then disassemble another part of the jig and place it in the area of the laminated thread group corresponding to that part. By repeating the operation of inserting the thickness direction thread and tightening the laminated thread group, the thickness direction thread is inserted into the entire region of the laminated thread group requiring the insertion of the thickness direction thread, and the laminated thread group is joined. A method for producing a three-dimensional fiber structure, which comprises forming a three-dimensional fiber structure and then decomposing and removing the jig from the inside of the three-dimensional fiber structure. 2. The method for producing a three-dimensional fiber structure according to claim 1, wherein the laminated yarn group is formed by placing a plurality of cloths on the outside of the jig. 3. The jig has a frame body in which pins are arranged at a predetermined pitch so as to surround an area corresponding to a thread insertion area in the thickness direction, and the laminated thread group is formed by folding the threads between the pins. The method for producing a three-dimensional fibrous structure according to claim 1, wherein the three-dimensional fibrous structure is configured by a plurality of yarn layers arranged in a line. 4. A thread layer is formed by folding the threads between the pins on a frame having an outer shape corresponding to the shape of the three-dimensional fiber structure and having a large number of pins attached at a predetermined pitch. After forming a laminated yarn group having at least biaxial orientation by laminating a plurality of layers, a three-dimensional fibrous structure in which the laminated yarn group formed on the frame is joined by a thickness direction yarn arranged in a direction intersecting each yarn layer. A jig used in the manufacturing method of 1., which is arranged at a position corresponding to the curved surface portion of the three-dimensional fiber structure and has a plurality of pins detachably fixed at least at its corner portion at a predetermined pitch. The second curved portion supporting member and the second curved portion arranged at a position corresponding to the curved portion other than the corner portion.
And a plurality of base frames that support the first and second curved surface support members and have a large number of pins removably fixed at positions corresponding to at least the peripheral edge of the laminated yarn group. And a bracket for fixing a part of the base frame so as to be disassembled and assembled from the inside of the laminated yarn group. 5. The base frames are arranged in parallel with each other and have a pair of substrates having a curved portion, and are fixed to the both substrates via brackets, and engaging recesses are formed on the outside. A plurality of support members, the first curved surface support member is disposed at a position corresponding to both ends of the support member, and is a support bar to which a large number of restriction pins are detachably fixed; The curved surface supporting member is a curved surface forming bar that is supported in parallel with the supporting bar in a state of being engaged with the engaging concave portion with respect to the supporting member, and both the boards have a predetermined inner diameter of the regulation pin. The jig of claim 4 equipped with a reference pin removably fixed in position.