JPH02229241A - Three-dimensional woven fabric and production thereof - Google Patents

Abstract

PURPOSE:To obtain the subject woven fabric applicable even to a field requiring strict dimensional accuracy, oil-resistance and chemical resistance of the inner face by placing a cylindrical member at the center and encircling the cylindrical member with a woven fabric woven with axial direction yarns, circumferential direction yarns and radial direction yarns. CONSTITUTION:The circumference of a cylindrical member P is encircled with a cylindrical woven fabric woven with a number of axial direction yarns Z extending along the axial direction, circumferential direction yarns ytheta inserted between the layers of the axial direction yarns Z along the circumferential direction of the layer and a number of radial direction yarns yrz inserted in continuously meandering state in axial direction and radial direction in a state crossing with circumferential direction yarns between arbitrary layers of the circumferential direction yarns in a cross-section containing the axis.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a three-dimensional fabric suitable as a skeleton material for cylindrical fiber-reinforced composite materials such as pipes and cylinders, and a method for manufacturing the same. [Prior Art] In recent years, metal parts have been frequently replaced with *a reinforced plastic (FRP) for the purpose of weight reduction.
FRP pipes are also used. On the other hand, composite materials with a three-dimensional fabric as a skeleton material and a resin or inert matrix are expected to have a wide range of uses as structural materials for rockets, aircraft, automobiles, ships, and buildings. ) Various methods have been proposed for producing three-dimensional fabrics (
For example, JP-A-56-142053, JP-A-61
-201063 Publication). [Problem to be Solved by the Invention 1] However, it is difficult to form pipes, etc., which are manufactured by impregnating a conventional cylindrical three-dimensional fabric with resin, to form the inner surface with high dimensional accuracy and to maintain a high degree of airtightness. In addition, it is difficult to apply it to fields where oil resistance and chemical resistance are strictly required, and metals are still used as materials in these fields. The present invention has been made in view of the above-mentioned problems, and its purpose is to overcome the threat of three-dimensional fiber composite materials that can be applied to fields where internal dimensional accuracy, oil resistance, and chemical resistance are strictly required. The purpose of this invention is to provide a three-dimensional fabric suitable as a material and a method for producing the same. [Means for Solving the Problems] In order to achieve the above-mentioned object, the three-dimensional a-product of the present invention has a cylindrical part arranged in the center, at least on the outer periphery thereof, a large number of axes extending along the axial direction. Directional yarn (z), circumferential yarn (y,) inserted along the circumferential direction between layers of axial yarn (z), and circumferential yarn (y,) inserted in the cross section including the axis.
A large number of radial yarns (y-s) inserted continuously in a meandering state in the axial direction and radial direction in a state perpendicular to an arbitrary interlayer circumferential yarn (y,) of , form a cylindrical shape. It is woven. Further, in the method for manufacturing the three-dimensional fabric, a large number of axial yarns (
The ends of the circumferential yarn (y, The ends are fixed near the center of the textile, and the circumferential threads (y,) are inserted from the outside of the axial threads (z) and radial threads (yr) forming each layer to press the layer to the center. One of each layer is formed by winding the yarn, and the opening position is changed by moving the axial yarn (z) and radial yarn (y4) corresponding to each layer in the axial direction while maintaining the radial position, and the opening position is changed and the yarn is moved in the circumferential direction. Thread (yθ
) is wound, and the radial thread (y.) is arranged for a predetermined length along the axial direction, and then bent in a direction perpendicular to the axial thread (z) to select the opening position. Some of the more circumferential threads (
y,) are arranged in a straight line so as to extend again along the axial yarn (z), and the remainder is the circumferential yarn (.ys).
The opening position of the radial system (y.) was changed so that the circumferential thread (yσ) was wound so that it was woven in a meandering manner without being wound from the outside. [Function] The Q three-dimensional fabric of the present invention has an elliptical structure around a cylindrical member placed in the center using three types of yarns: axial yarn (Z), circumferential yarn (y,), and radial yarn (y0). When used as a composite material with a matrix of resin, etc., the composite material supports the pressure applied inside the cylindrical member, and the cylindrical member meets conditions such as inner dimensional accuracy, oil resistance, and chemical resistance. Make me feel uncomfortable. In addition, the circumferential yarn (y,) wound in multiple layers along the circumferential direction of the 1a object meanders continuously in the axial and radial directions in a state perpendicular to the circumferential yarn (y,). Since there are many radial systems (yrz) inserted in
By changing the insertion position and folding position of the radial yarn (yrz) with respect to the circumferential yarn (Va), the yarn density in the radial direction at the outer circumference can be arbitrarily selected, so that the density is the same as that at the inner circumference. By changing the arrangement of the three types of yarn in various ways, including such changes, the physical properties of the fabric and the shape of the object can also be changed.Also, the second claim In the manufacturing method described in , the ends of a large number of axial yarns (z) and radial yarns (yrz) are arranged at predetermined positions and fixed to a yarn support so as to form a multilayered state around a cylindrical member. Circumferential threads (yσ)
Weaving begins with the end of the workpiece fixed near the center of the workpiece. The circumferential yarn (y, } is sequentially inserted between each layer of the axial yarn (z) according to the opening state of the axial yarn (z), and is inserted around the axial yarn (z) of the corresponding layer. Then, the opening position of the radial yarn (y-z) is changed and the circumferential yarn is wound on the outside of the radial system (yrz) so that the radial yarn (yrz) is crimped onto the inner layer. As a result, the radial yarn (yrz) is woven between any layers of the circumferential yarn (yζ) in a state perpendicular to the circumferential yarn (yσ), that is, parallel to the axial yarn (z). By changing the opening position of the radial yarn (yrz), it is possible to change the turning position in the radial direction of the radial yarn (yrz) at a desired position.
By appropriately changing the axial length and radial length of z), three-dimensional fabrics with various structures can be manufactured. [Embodiment 11] Hereinafter, a first embodiment embodying the present invention will be described with reference to FIGS. 1 to 5. As shown in Fig. 1.2, the three-dimensional fabric F has axial yarns (2), circumferential yarns (y- ) and radial yarn (y0) are woven into a cylindrical shape. The axial yarn (2) is stretched in two layers so as to extend along the axial direction in a concentric circle around the vip P, and the circumferential yarn (y#) is placed between the layers of the axial yarn (2) and on the outside. It is inserted so as to extend perpendicularly to the axial thread (z), that is, along the circumferential direction of the vibe P. In addition, in the cross section including the center of the pipe P, a large number of radial threads (y
rz) is inserted so that adjacent radial yarns (y-s) are alternately folded between the innermost layer of the circumferential yarn (y#) and the outermost layer of the circumferential yarn (y#) with their phases shifted from each other. It has been done. Since the distance between adjacent radial yarns (y-s) increases toward the outside of the three-dimensional fabric F, the number of axial yarns (z) woven between each radial yarn (yrz) increases toward the outside. ．． A pipe-shaped composite material is formed by impregnating this three-dimensional object F with resin. Composite materials using this three-dimensional fabric F as a skeleton material are used as hydraulic and pneumatic piping, and chemical liquid transport piping. Since the fluid pressure inside the pipe P is supported by the three-dimensional fabric F, the pipe P does not need to support the fluid pressure, and the dimensional accuracy, surface roughness, oil resistance, and chemical resistance of the inner surface of the pipe P is determined depending on the purpose of use. It is only necessary to have the following functions, and the weight can be reduced by making the wall thinner.

Next, a method for manufacturing the three-dimensional fabric F in which the pipe P is embedded will be explained. As shown in Fig. 3, the device for weaving three-dimensional fabrics has an elliptical structure that is divided into upper and lower parts with the weaving section of the three-dimensional object sandwiched in between. It is arranged so that it can be moved up and down and rotated in one piece. A support 4 having a large number of radially extending arms 3 is supported on the spline shaft 2 so as to be able to rotate integrally with the spline shaft 2 at a predetermined position. It can be moved up and down. An air cylinder 5 is fixed to the tip of each arm 3 so as to extend upward. A holder holder 7 is attached to the tip of the piston mouth 5a of the air cylinder 5 to attract and hold a bobbin holder 6 made of a magnetic material by the action of an electromagnet. A bobbin B around which an axial thread (2) or a radial thread (yrz) is wound is removably attached to the bobbin holder 6. Above the support table 1 is a thread fixing table 8 as a thread supporter.
is disposed symmetrically with the support table 1 so that it can move up and down and rotate integrally with the spline shaft. A pipe P can be fixed between the two tables 1.8. A support body 11 having a large number of radially extending arms 10, similar to the support body 4, is fitted to the spline@9 at a predetermined height position so as to be able to rotate integrally with the spline shaft 9. Although both spline shafts 2 and 9 are completely separated, they are designed to rotate in a predetermined direction and move up and down in synchronization with each other. An air cylinder 12 is fixed to the tip of each arm 10 so as to extend downward, and its piston rod 12
At the tip of a, a holder holder 13 is attached which attracts and holds the bobbin holder 6 made of a magnetic material by the action of an electromagnet in the same manner as described above. The holder holders 7 and 13 are in a positional relationship in which the same pair of upper and lower sides always face each other, and the movement of the holder holders 7 and 13 up and down by the operation of the air cylinder 5 and 12 and the excitation and demagnetization of the electromagnet cause the same bobbin holder to be held together. 6 is exchanged. A guide frame 14 is provided on the upper central surface of the support 4 for regulating the fiber forming position.

A circumferential yarn supply section 15 is provided in the outer circumferential direction of the bobbin holder at approximately the same height as the upper end surface of the guide frame l4. Support frame 1 constituting the circumferential yarn supply section 15
6 is formed in a radial direction around the spline shafts 2 and 9, and a circumferential thread bobbin 17 on which a circumferential thread (yθ) is wound is removably attached to the outer periphery of the bobbin 6. Further, on the inner peripheral side of the support frame 16, a thread guide 18 for guiding the circumferential thread (y#) fed out from the circumferential thread bobbin 17 to a weaving position and an appropriate thread tension applying device as necessary are provided. It is being done. The thread guide 18 is made of a wear-resistant material. Next, we will explain the weaving action of three-dimensional fabric using the above device. Prior to three-dimensional II\II/J weaving, first, the vip P is set between the centers of both tables 1 and 8 so that its axis coincides with the axis of the spline shaft 2.9, and each One end of the radial direction system (3/-1) and the axial direction thread (2) unwound from the bobbin B attached to the bobbin holder 6 are placed on the upper thread fixing table 8 in multiple layers (in this embodiment, three layer). This results in
As shown in Figure 4, the axial thread (z) and the radial thread (y
rz) are arranged radially around the spline shafts 2 and 9.

Further, the circumferential yarn (y,
) is fixed to the thread fixing table 8 on the top 11. Weaving is then started from a state in which each bobbin holder 6 is held by the upper and lower holder holders 7.13 in accordance with the weaving conditions.

As shown in FIG. 3, the axial yarn (z) and the radial yarn (yrz) that are paid out from the bobbin holder 6 are in a state where the bobbin holder 6 is placed in the raised position held by the upper holder holder 13. It is located above the circumferential yarn (y2) paid out from the circumferential yarn bobbin 17, and is shown by the two-dot chain line in the figure when the bobbin holder 6 is placed in the lowered position held by the lower holder holder 7. As above, the circumferential thread <
ye) is placed at the intersection. Therefore, when the holder holder 7.13 revolves with the rotation of the spline shaft 2.9, when the bobbin holder 6 is placed in the lowered position and passes a position corresponding to the circumferential yarn supply section 15, the axial yarn (z) or the end of the m object side of the radial yarn (yrz) is axially attached to the circumferential surface of the three-dimensional R object during weaving by the circumferential yarn <y#) paid out from the circumferential yarn bobbin 17. It is fixed in an extended state. Fig. 5 4a1) and [a2) respectively show the state when weaving the three-dimensional IIIll object shown in Figs. There is. From this state, as shown in the same figure (b1) and (b2), the radial system (3
'riS. y. , ) are extended so as to approach the upper end surface of the guide frame 14 by holding the bobbin holder 6 in the holder holder 7 in the lowered position, and the other bobbins B
1. Four radial threads connected to B2, Bi, and B4 (
3'rml + 3'r*2 + ¥rs3 +
yrt4 + ) are bent and held in the raised position by the holder holder 13 so as to be close to the thread fixing table 8. When the spline shafts 2 and 9 are rotated twice, the first layer of the circumferential yarn (ya) is wound one inch around the pipe P fixed between the centers of the two yarn fixing tables 1 and 8, and then lowered. The radial yarn (3'rss. yr-b) connected to the bobbin holder 6 placed at the position is the circumferential yarn (y#
), and as shown in FIGS. 5(cl) and (C2), the circumferential yarn <<y,>> is wound around the vip P in two stages. As a result, the radial yarn ('l' ri! +
3/rm6) is crimped in the axial direction, and the other four radial threads, which were bent outward, remain unrestrained. Next, Figure 5 (d2
), the bobbin 83B4 is moved from the raised position of the holder holder 13 to the lowered position? Radial thread <3'. 3. 3'
r-4) is close to the upper end surface of the guide frame 14. In this state, when the spline shaft 2.9 is rotated and the 271st circumferential yarn (yθ) is wound in two stages in the same manner as above, the radial yarn (3'rgs, y■4) is crimped in the axial direction. The state shown in Fig. 7 (e1) and (e2) is obtained, and the first stage of construction is completed. Next, the spline shaft 2.9 is moved upward and the three-dimensional fabric F
bobbin Bj. is pulled up a predetermined amount and placed in the lowered position. After B4 is transferred to the raised position and bobbin BB2 placed in the raised position is transferred to the lowered position and the radial thread is arranged as shown in Fig. 5 (f1) and (f2). , the circumferential thread (y,) is wound by the rotation of the spline shaft 2.9. As a result, the radial yarn (y45y06) was connected to bobbins B, B6 and extended in the axial direction inside the first layer circumferential yarn yθ.
is arranged so as to extend in the axial direction as shown in FIG. 5 (g2), and the bobbin B? The radial direction system (y■l + !/rml) connected to 2 is arranged from the outermost layer of the workpiece to the inside of the first layer of circumferential yarn (y#) as shown in Fig. 5 (g1). Third, the bobbins Bs and B= are transferred from the raised position to the lowered position, and the radial threads (3' ras . 3' rxa
) approaches the guide frame 14 as shown in Fig. 5 (h1),
After the radial threads are arranged as shown in (h2), the circumferential threads (y,) rotate with the rotation of the spline shaft 2.9.
In the first stage of weaving, the circumferential yarn (
The radial threads ( y ,.− s ,, y − 4
> continue to extend in the axial direction as shown in Figure 5 (i1).
The state becomes (i2), and the second stage of weaving is completed. Next, the spline shaft 2.9 is moved upward and the three-dimensional fabric F
is pulled up by a predetermined amount, and bobbins B+, B2, Bs, and B4 placed in the lowered positions are raised! After the circumferential yarn (y,) is transferred to the spline shaft 2 and the radial yarn is arranged as shown in FIG.
．． Wrap it around by rotating 9? , the radial threads (Vrsj +3'r■) connected to bobbins B- and B6 are shown in Figure 5 (
k2), it is arranged so as to extend in the axial direction inside the circumferential yarn yθ of the first layer. Then the fifth
As shown in the figure (J2), bobbin Bs. B= is moved from the ascending position to the descending position, the radial system (Yes.!/rs<) connected to each bobbin approaches the guide frame 14, and as the spline shafts 2 and 9 rotate, the circumferential thread ( y#) and crimped inward by the first
The radial threads ('! rz3 . yrz4) that were in the state of extending in the axial direction between the layer and the second layer are both extended in the axial direction as shown in Figure 5 (m1). The thread arrangement becomes as shown in (rm2) and the third stage is completed. Thereafter, weaving is continued sequentially in the same manner, and a cylindrical three-dimensional a-product F having a vibrator P in the center is woven. In this binding method, a specific bobbin holder 6 is always held in a lowered position during its revolution, so that the radial yarn (3'rs3
+3'rs4 t'Its@+yrs4)
are always woven so as to extend along the axial direction, and after weaving they become axial yarns (z) of the three-dimensional object F.

Also, other radial systems (3'rs+ + 3'rZ
2) is woven in a state in which the circumferential yarn (y,) is alternately folded back between the inside of the first layer and the outside of the second layer. [Example 2] Next, a second example will be explained according to FIG. In this embodiment, a pipe P having flanges Pa at both ends is a three-dimensional
! The three-dimensional feature of the above embodiment is that it is woven into the material F and that a thick-walled pipe is used as the pipe P.
It is different from a-product F. In such a structure, the flange P
The action of a prevents the ends of each thread from shifting in the axial direction of the vibrator P, and each thread is maintained in the state immediately after making a until it is impregnated with resin, improving the bonding state between each thread and the vibe P. do.
In addition, since the vipe P is thick, it can be finished by Il machining even after it is made into a composite material due to the resin inclusion, making it suitable for use as parts that require high-precision fitting. This three-dimensional fabric F is applied to both tables 1 of the apparatus of the above embodiment.
．． It is obtained by weaving in the same manner as in the previous example, with a pipe P having a flange Pa fixed between the pipes 1 and 8. [Embodiment 3] Next, a third embodiment will be explained according to FIG. The three-dimensional fiber eIF of this example is used for the cylinder of an oil damper. A bottomed cylindrical member 19 having a flange 19a at the open end is woven into the center of the three-dimensional fabric F. After impregnating this three-dimensional object F with resin and making it into a composite material,
The oil damper 22 is assembled by housing the piston 20 having the through hole 20a and the oil 0 inside the cylindrical member 19, and attaching the cap 21 to the flange 19a. This three-dimensional fabric F also has a cylindrical member l9 fixed between both tables 1.8 of the apparatus of Example 1,
Obtained by weaving in the same manner as in the previous example. [Embodiment 4] Next, a fourth embodiment will be explained according to Fig. 8.9. The three-dimensional fabric F of this embodiment is also used for the cylinder of an oil damper, but not only the outer periphery but also the bottom of the bottomed cylindrical member 19 woven into the center of the three-dimensional fabric F is surrounded by a material. This embodiment differs from the third embodiment in that In the case of this embodiment, the thickness of the bottom of the cylindrical member 19 can also be reduced, making it possible to further reduce the weight. This three-dimensional fabric F can also be manufactured using the apparatus of the first embodiment, but unlike in each of the embodiments, the cylindrical member 19
are fixed to the support table 1 on the flange 19 side with the bottom side separated from the thread fixing table 8 by a predetermined distance, and are the radial yarn (y4) and axial yarn paid out from the bobbin B attached to each bobbin holder 6. One end of (z) is fixed to the thread fixing table 8 in a concentric circle of 47i1. Then, the weaving is performed in the order shown in FIG.

Figure 9 (a1) ~ (o1) , (a3) ~ (o3)
．． (a2) to (02) are radial yarns (y,.) or axial yarns (y,) that are alternately folded back between the inside of the innermost layer and the outside of the outermost layer of the circumferential yarn (y,) of the three-dimensional fabric, respectively. 2) shows a cross section showing the weaving state.
Figure 9 (a1), (a2), and (a3) are three-dimensional fabrics woven? From this state, the same figure (b) is shown.
1). As shown in (b2) and (b3), Hobin B+,
Radial threads connected to Bt (3'rsl + 3'rs
2) is tensioned so that the bobbin holder 6 is held close to the upper end surface of the guide frame 14 by being held by the holder holder 7 in the lowered position, and the six radial directions connected to the bobbin B, ~B, Each of the threads (y03 to y48) is bent and held in a raised position by the holder holder 13 so as to be close to the thread fixing table 8. Spline shaft 2.9 is 3
When rotated, the first layer of the circumferential yarn (y#) is wound, and the radial yarn (y■+ + 37rs2) connected to the bobbin holder 6 placed in the lowered position is wrapped around the circumferential yarn (y#). The radial yarn (3'rsL + 3'rml) is woven inside, as shown in Figure 9 (C1).
extends in the axial direction with the circumferential thread (y#) wound in three stages around it, and then is bent at right angles along the bottom surface of the cylindrical member 19 and bent outward. The other six radial threads in the shape WsC remain unrestrained. Next, as shown in FIG. 9 (d2), the bobbins Bs and Ba
are transferred from the holder holder 13 in the raised position to the holder holder 7 in the lowered position, and the radial threads ('/rss, 3' rs4) connected to each bobbin come close to the upper end surface of the guide frame 14. In this state, the spline shaft 2.9 is rotated, and the second layer of circumferential yarn 《y
,》 is wound in three stages, the radial thread ( 3'
rss + 3/rsb. ) is crimped in the axial direction and extends in the axial direction with the circumferential thread (y, ) wound in three stages around it, and then bent at right angles along the bottom surface of the cylindrical member 19, The other four radial threads, which were in a state of being bent outward, remain unrestricted as shown in FIGS. 9(e1) and (e2). The state shown in fe3) is obtained. Next, as shown in FIG. 9 (f2), after the bobbin Bs, B< is transferred from the raised position to the lowered position,
The spline shaft 29 is rotated, and the circumferential yarns (V#>) of the third and fourth layers are wound in three stages, respectively, resulting in the state shown in FIG. 9 (+; +1) . (!; 12), fg3). is obtained, and the first stage of weaving is completed. Next, the spline shaft 2.9 is moved upward and the three-dimensional fabric F
bobbin B1. has been pulled up a predetermined amount and is placed in the lowered position. B2, Bs, B- are transferred to the raised position and the bobbin B7. Figure 9 (old), (h2>, (h
After the radial threads are arranged as shown in 3), the circumferential threads (y,) are rotated by the rotation of the spline shafts 2 and 9.
It can be wrapped around the steps. As a result, the radial yarn (3'rss = yrs6>, which was connected to the bobbins as and Ba and extended in the axial direction inside the first layer circumferential yarn yθ, becomes cylindrical as shown in FIG. 9 (12). The bobbin B is arranged to extend in the axial direction along the outer peripheral surface of the member 19.
The radial threads (y-t, y-1) connected to 7 and Be are the circumferential threads (y# ) is distributed even to the inside of the first layer. Next, the bobbins Bs and B4 are transferred from the raised position to the lowered position, and the radial threads (3' r
s3 + 3/rs4) approaches the guide frame 14 and becomes the radial thread arrangement state shown in FIG. The circumferential thread (y,) is crimped onto the outer peripheral surface of the cylindrical member 19 and is arranged in a state extending in the axial direction between the first layer and the second layer of the circumferential thread (y,), as shown in FIG. 9 (k1). (k2
), (k3), and the second stage of greening is completed. Next, the spline shafts 2 and 9 are moved upward and the three-dimensional fabric F
bobbin Bs. is pulled up a predetermined amount and placed in the lowered position. B4. By. Ba is relocated to the elevated position,
Meanwhile, bobbins B, B2 are transferred to the lowered position, and
Figure (j 1). After the radial threads are arranged as shown in (J2) and (j3), the circumferential thread (y,) is wound by the rotation of the spline shaft 2.9, and the bobbin B+ . Radial threads connected to Bt (3'rmt.y
-2) is arranged from the outermost layer of the fabric to the inside of the first layer of circumferential yarns (y#) as shown in FIG. 9(1).
Also, bobbin Bs, B. radial thread (3'rss
．． y, s*) is arranged so as to extend in the axial direction inside the circumferential yarn (y, ) of the first layer, as shown in FIG. 9 (m2). Next, as shown in FIG. 9 (n2), the bobbins B) and B4 are transferred from the raised position to the lowered position, and the radial yarn (5) connected to each bobbin is transferred from the raised position to the lowered position.
'r@l +y04》 approaches the guide frame 14, and as the spline shaft 2.9 rotates, the circumferential thread (y,)
The radial threads (3'rsi+3'r
t4) are both extended in the axial direction as shown in Figure 9 (o
1), (o2>), and the third stage is completed.Hereafter, three-dimensional fabrics are sequentially woven around the outer periphery of the cylindrical member 19 in the same manner as in each of the above embodiments. The invention is not limited to each of the above embodiments, and for example, the tenth embodiment
As shown in the figure, the radial yarn (y...) is the circumferential yarn <
3/#) that is folded back alternately between the inside of the first layer and the outside of the second layer, and the one that is folded back alternately between the inside of the first layer and the outside of the second layer. It has a structure in which two types are woven in a regular repeating state: one that is alternately folded back between the inside and the outside of the second layer, and the axial yarn (2), the circumferential yarn (y, ), and the radial yarn. You may also increase the number of directional threads (yrz). Also, instead of directly fixing the vipe P and the cylindrical member 19 to the support table 1, a core metal is fixed to the support ÷ bull 1, and weaving is performed with the vip P and the cylindrical member 19 inserted into the core metal. You can. In this case, even if the pipe P or the cylindrical member 19 is thin, the pipe P is
The core metal supports the force applied to the pipe P and the cylindrical member 19, and there is no risk that the pipe P or the cylindrical member 19 will be deformed during weaving. Also, weaving may be started with the end of the axial yarn (z) or radial yarn (y.) fixed to the end of the vip P or the cylindrical member 19, or both the holder holders 7 and 13 may be moved up and down. Instead of being movably oval shaped, only one side is oval shaped so that it can be moved up and down, or the support 4, lift! is used to wrap the circumferential yarn (y#). Instead of rotating I, the circumferential yarn supply section 15 side may be revolved around the support table 1. Furthermore, a plurality of circumferential yarn supply sections 15 may be provided.

Further, the mechanism for holding the radial yarn (yrz) bobbin holder 6 is not based on a magnet, but may be a pneumatic or hydraulic type holder. [Effects of the Invention] As detailed above, in the three-dimensional fabric of the present invention, the cylindrical member disposed at the center is surrounded by axial yarns (2) and circumferential yarns (y
, ) and radial yarn (y4), and when used as a composite material with a matrix of resin, etc., the cylindrical member has dimensional accuracy, oil resistance, and chemical resistance. By using a product that meets the required performance, it can be applied to fields where internal dimensional accuracy, oil resistance, and chemical resistance are strictly required. In addition, since the pressure applied within the cylindrical member is supported by the composite material, the cylindrical member itself is not required to have mechanical strength. This makes it possible to use thin-walled materials, making it possible to reduce weight. Furthermore, since the three-dimensional fabric is composed of three component yarns in the axial direction, circumferential direction, and radial direction, even when a force that deforms the composite material is applied, 1411 of the inner and outer layers is reliably prevented, and all layers f of
aThe cod contributes to the protection of the cylindrical member. Further, in the manufacturing method according to the second claim, the axial yarn {z)
Three types of threads, one radial thread (y.) and circumferential thread (V#), are continuously inserted into the outer circumference of the cylindrical member in its axial direction, radial direction, and circumferential direction, improving productivity. It is easy to automate the process, and the woven three-dimensional illumination
A composite material, which is a final product, can be obtained by impregnating the ill material with a resin or the like. Also, radial yarn (yrz
) by changing the turning position in the radial direction by a desired digit, the meandering state of the radial yarn (y-*) and the number of steps of the circumferential yarn (yσ) arranged between the yarns of the radial component can be adjusted. It is possible to weave three-dimensional fabrics with a variety of weaving W4 patterns that can be easily changed, and can accommodate a variety of material designs.

[Brief explanation of the drawing]

1 to 5 show an embodiment embodying the present invention, in which FIG. 1 is a cross-sectional view of a three-dimensional laIIil, FIG. 2 is a cross-sectional view taken along the line X-X in FIG. The figure is a partially cutaway schematic front view of a three-dimensional loom, Figure 4 is a sectional view taken along the line A-A in Figure 3, and Figures 5 (a1) to (1) correspond to the Y-Y track cross section in Figure 2. Schematic diagram showing the weaving action, Figure 5 (a2) to (11)
2> is a schematic diagram showing the weaving action corresponding to the Z-Z line cross section of FIG. 2, FIG. 6 is a sectional view of the three-dimensional m-piece of the second embodiment, and FIG. Cross-sectional view of the fabric, Figure 8 is the 4th
Cross-sectional view of the three-dimensional textile of the example, Figure 9 (a1》~(o
l), (a2) to (o2). (a3) ~(o
3) is a schematic diagram showing the fiber-making action, and FIG. 10 is a cross-sectional view of a modified three-dimensional product. Support table 1, arms 3, 10, bobbin holder 6, holder supports 7, 13, yarn fixing table 8 as a yarn support, circumferential yarn supply section 15, circumferential yarn bobbin 17, cylindrical member 19, cylindrical member Vip P, bobbin B, axial yarn (2), radial yarn (yrz)-circumferential yarn Cye},
Three-dimensional eight objects F. Patent applicant Yutaka Co., Ltd. [1 Automatic Loom Manufacturing Agent Patent attorney Hironobu Onda Figure 5 (a2) (b1) (C1) (e1) (e2) (f1) (h1) (h2) Figure 5 (κ1) (κ2) (I1) Figure 5 (JT12) Procedures Shinshi Seisho (Method 0) 1. Display of the case 1999 Patent Application No. 047987 Name of the invention Three-dimensional textile and its manufacturing method 3, Amendment Relationship with the case of the person who did the following: Patent applicant Address: 2-1 Toyota-cho, Mef-yoku City, Aichi Prefecture Name: 321 Toyota Industries Corporation Representative: Toyota
Yoshitoshi 4. Agent address: 2 Hatazume-cho, Gifu City, 500 Japan TEL: 0582 (65)-1810 (Representative) Fax only: 0582 (66)-13397. Contents of amendment (1) The description of “Figure 5” on page 28, line 19 of the specification has been changed to “
] in Figure 5. <2> The statement "Fig. 5" in the first line of page 29 is amended to read "of Fig. 5." (3) The description of "Figure 9" on page 29, line 5 is amended to read "Figure 9." May 15, 1999 (Shipped on May 30, 1999)

Claims (1)

[Claims] 1. A large number of axial threads (z) extending along the axial direction at least on the outer circumference of the cylindrical member disposed at the center;
Circumferential yarn (y_σ) inserted along the circumferential direction between layers of axial yarn (z), and circumferential yarn (y_σ) between any layers of circumferential yarn (y_σ) in the cross section including the axis. A three-dimensional fabric in which a large number of radial threads (y_r_z) are woven in a cylindrical shape, with a large number of radial threads (y_r_z) inserted in a meandering manner in the axial and radial directions in a perpendicular manner. 2. A large number of axial threads (z) and radial threads (y_r_z
) are arranged radially around a cylindrical member placed at a predetermined position in a multi-layered state while being fixed to a yarn support, and the ends of the circumferential yarn (y_σ) are fixed near the center of the fabric. The axial yarn (z) and radial yarn (y_
One of each layer is formed by winding the circumferential yarn (y_σ) from the outside of the layer (r_z) so as to press the layer to the center, and for each layer, the corresponding axial yarn (2) and radial yarn (y_r_
z) in the axial direction while maintaining the radial position, the opening position is changed and the circumferential thread (y_σ) is wound around the radial thread (y_r_z). It is bent in the direction perpendicular to the axial thread (z), and some of it is bent in the direction perpendicular to the axial thread (z), and depending on the opening position, some of the parts are
σ) is arranged linearly so as to extend again along the axial direction thread (z), and the remaining part is arranged in the radial direction without being wound from the outside by the circumferential thread (y_σ) and meandering. Radial yarn (y_r_z) to be woven in the state
A method for manufacturing a three-dimensional fabric in which a circumferential yarn (y_σ) is wound by changing the opening position of the woven fabric.