JPH0244936B2 - KOSAKANJOSENIKOZOTAI - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cross-tubular fiber structure, which is resin molded for use in space vehicles, aircraft, automobiles, railway vehicles, ships, mechanical devices, buildings, and other structural materials. Used to strengthen products.

(Prior art) Metal fibers,
Epoxy is applied to a fiber structure made of high-performance fibers with excellent heat resistance, strength, and elasticity, such as carbon fiber, graphite fiber, glass fiber, silicon carbide fiber, alumina fiber, polyester fiber, and aliphatic or aromatic polyamide fiber. Those obtained by impregnating a matrix resin such as resin or phenolic resin, molding into a desired shape, and curing are used. However, if the above-mentioned resin molded product is pipe-shaped, the fiber structure is also formed into a pipe-shape.
As such a pipe-shaped fiber structure, a large number of warp yarns arranged parallel to the length direction,
It is known that the weft is made of a weft yarn that is passed in a meandering manner between a large number of warp yarns in a plane perpendicular to the warp yarns (Japanese Unexamined Patent Publication No. 194145/1983,
58-163749 and Japanese Patent Application Laid-Open No. 58-220847). When a cross-shaped, T-shaped, L-shaped, etc.-shaped pipe is required, conventionally, straight fiber structures as described above were joined by adhesives, sutures, etc. .

(Problem to be solved by the invention) When straight tubular fiber structures are joined together to form a cross-tubular shape, the reinforcing threads are not connected at the joined part, so the strength of this part is higher than that of other parts. There was a problem that the strength of the resin molded product was lowered, and the strength of the resin molded product was lowered.

This invention provides an integrated cross-tubular fiber structure in which threads are arranged in the axial direction and circumferential direction of a tubular part, and the density of the arrangement is almost uniform, and the threads are connected in each part without breaking. It provides:

(Means for solving the problem) At least two tubes each consisting of a large number of warp yarns and weft yarns arranged approximately perpendicularly are arranged in a cross shape, T
It is formed into a cross-tubular shape that crosses in a shape such as a letter or an L-shape, and the weft threads meander between the warp threads of the warp threads in the warp direction tubular part, the weft direction tubular part, and these intersections, and the adjacent weft threads intersect with each other. They are laminated with alternating directions so as to intersect, and in the warp direction tubular section, the above-mentioned weft threads run in the circumferential direction and connect all the warp threads in a tubular shape, and the weft direction tubular section and the above-mentioned intersection section are laminated. Then, the above-mentioned weft threads run across the entire width and tie all the warp threads between them in the weft direction, and in the tubular part in the weft direction, the warp threads run circumferentially and tie all the weft threads in a tubular shape, forming a tubular part in the warp direction. The above-mentioned warp threads are passed through the entire length of the above-mentioned intersections, and all the weft threads therebetween are tied in the warp direction. As the above-mentioned warp and weft yarns, it is preferable to use single yarns, rovings, aligned yarns, and twisted yarns made of highly functional fibers, singly or in combination, as in the past.

(Function) An outer shape similar to that obtained by cutting a flat woven fabric into shapes such as a cross, a T-shape, and an L-shape and stitching a plurality of the sheets together at their edges can be obtained. That is, each of the tubular portions in the warp and weft directions and their intersections are formed in a weave of intersecting warp and weft yarns. The warp yarns of the tubular portion in the warp direction and the weft yarns of the tubular portion in the weft direction each extend to the intersection, forming the intersection to have the same structure as the tubular portion, and no seam occurs at the intersection. However, the stitching of the edges is performed using the warp and weft yarns themselves that constitute the tubular portions and intersections in the warp and weft directions, and no seams occur in the portions corresponding to the edges.

(Example) FIG. 1 shows the structure of the front and back two cross-shaped fabrics 1 and 2 shown in FIG. In FIG. 2, the front fabric 1 consists of a central part 1a, an upper protruding piece 1b, a lower protruding piece 1c, a left protruding piece 1d, and a right protruding piece 1e. 2b, a lower protruding piece 2c, a left protruding piece 2d, and a right protruding piece 2e. Then, both left and right edges of the upper protruding pieces 1b and 2b and both left and right edges of the lower protruding pieces 1c and 2c are connected with weft threads 4, respectively, and both upper and lower edges of the left protruding pieces 1d and 2d and the right and left edges of the right protruding pieces 1e and 2e are connected. Both upper and lower edges are connected with warp threads 3, and the upper ends of the upper protruding pieces 1b and 2b, the lower ends of the lower protruding pieces 1c and 2c, the left ends of the left protruding pieces 1d and 2d, and the right ends of the right protruding pieces 1e and 2e are connected, respectively. Open ends 5b, 5c, 5d, and 5e are formed without being tied. Projections 1b and 2b, 1c and 2c on the front and back sides, 1
Figure 3 shows the state in which the overlapping parts of d and 2d, and 1e and 2e are expanded and inflated.
a and 2a connect the intersection 6a, lower protrusions 1b and 2b connect the upper tubular part 6b in the vertical direction, lower protrusions 1c and 2c connect the lower tubular part 6c in the vertical direction, and left protrusions 1d and 2d The left tubular portion 6d in the horizontal direction and the right projecting pieces 1e, 2e
The right tubular portions 6e in the horizontal direction are respectively configured.

In the upper and lower tubular parts 6b, 6c in the warp direction, that is, the upper and lower projections 1b, 2b, 1c, 2c, the weft threads 4, 4 meander between the warp threads 3 in a zigzag pattern, as shown in FIG. The two weft threads 4, 4, 4, 4, 4, 4, 4, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4 type type type type type type type type type type type type type type type type.
4 are alternately stacked with their directions changed so that they intersect. In addition, the tubular portion in the horizontal direction, that is, the protruding pieces 1d, 2d, 1e, 2e on the left and right, and the intersecting portions 1a, 2a.
In this case, the weft yarns 4, 4 are laminated separately across the entire width of the front and back fabrics 1, 2 in a meandering manner, and the directions are alternately changed so that the adjacent weft yarns 4, 4 intersect.

On the other hand, in the horizontal tubular parts 6d, 6e, that is, the left and right protrusions 1d, 2d, 1e, 2e, the warp threads 3 passed upward through the front protrusion 1d are connected to the back protrusion 2d.
The warp threads 3 are threaded downward through the protrusions 1 on the front, back, left and right.
Connect d, 2d, 1e, and 2e. In addition, the warp threads 3 are passed upward through the tubular parts 6b, 6c and the intersection part 6a in the warp direction, that is, the upper and lower projections 1b, 2b, 1c, 2c, and the central parts 1a, 2a, so as to pass through them. Afterwards, it is folded back and passed downward, and then this process is repeated to pass it through the front side in a zigzag pattern, and then to the back side in a zigzag pattern. Note that the warp yarns 3 are bent, aligned and passed through the tubular portions 6b, 6c and the intersection portion 6a in the warp direction, and the looped folded ends of the warp yarns 3 are passed through the tubular portions 6b and 6c in the warp direction.
It is also possible to connect the folded loops by protruding from the end faces of b and 6c and passing thread through the looped folded ends.

The embodiment of FIGS. 4-6 shows a T-shaped intersecting tubular fibrous structure. In FIG. 5, the front fabric 1 and the back fabric 2 have central portions 1a and 2, respectively.
a, upper protruding pieces 1b, 2b, lower protruding pieces 1c, 2c, and left protruding pieces 1d, 2d, and as shown in FIG. is folded back to the back side, and the weft threads 4 laminated on the back side are folded back to the front side, so that the weft threads 4 themselves are bound together, and the rest is the same as the embodiment shown in FIGS. 1 to 3. FIG. 6 shows the swollen state of this double-woven fabric. That is, the center parts 1a and 2a of the front and back sides connect the intersection part 6a, the upper projecting pieces 1b and 2b connect the upper tubular part 6b in the vertical direction, and the lower projecting pieces 1c and 2c connect the lower tubular part 6c in the vertical direction. The left projecting pieces 1d and 2d each form a left tubular portion 6d in the horizontal direction. In addition, 3 is the warp thread, 5b, 5
c and 5d are open ends.

The embodiments of FIGS. 7-9 show an inverted L-shaped intersecting tubular fibrous structure. In FIG. 8, the front fabric 1 and the back fabric 2 have central portions 1a and 2, respectively.
a, lower protruding pieces 1c, 2c and left protruding pieces 1d, 2d, as shown in FIG.
The right edge of the warp yarn 3 is tied with the weft yarn 4 as in the example shown in FIG. 4, and the upper edge of the warp yarn 3
By folding back the warp threads 3 to the back side and folding the warp threads 3 passed through the back side to the front side, the warp threads 3 themselves are bound together. FIG. 9 shows the swollen state of this double-woven fabric. That is, the center portions 1a and 2a of the front and back sides connect the intersection portion 6a to the lower projecting pieces 1c and 2.
c is the lower tubular part 6c in the vertical direction, and the left protrusion piece 1
d and 2d form a left tubular portion 6d in the horizontal direction, respectively. Note that 5c and 5d are open ends.

In each of the above embodiments, the left protrusion piece 1d on the front and back sides,
2d, the weft threads 4 spanning the center parts 1a, 2a and the right projecting pieces 1e, 2e are laminated to the same length from the upper layer to the lower layer, and the horizontal tubular parts 6d, 6e are stacked against the longitudinal tubular parts 6b, 6c. However, the weft yarn 4 may be bent at the base of the weft-direction tubular parts 6d, 6e to make the weft-direction tubular parts 6d, 6e inclined.

In addition, as shown in FIG.
d, 2d, central portions 1a, 2a and right protruding piece 1e,
When laminating the weft yarns 4 of 2e, the laminated length of the weft yarns 4 is gradually increased from bottom to top in the lower part A, the laminated length is made equal from the bottom to the top in the middle part B, and the laminated length of the weft yarns 4 in the upper part
Now, separate from the upper projecting pieces 1b and 2b and separate the weft thread 4.
By stacking the layers by decreasing the stacking length in order so that the distance between them increases from bottom to top,
The lateral tubular parts 6d, 6e (see FIG. 11) can be inclined, in which case the lateral tubular parts 6 in the embodiments of FIGS.
The shape is more stable than when d and 6e are bent at their bases.

FIG. 12 shows the upper protruding piece 1b of the example shown in FIG.
2b is omitted, and the upper edges of the central portions 1a, 2a are connected with the warp threads 3 as in the example shown in FIG. 7, and as shown in FIG. A cross-tubular fiber structure consisting of a lower tubular portion 6c in the warp direction is obtained.

Further, the tubular portion in the horizontal direction can be formed in three or more directions. For example, by laminating the weft yarn 4 in a shape in which four cross-shaped fabrics 1 and 2 shown in FIG. 2 are bound together, as shown in FIG. A cross-tubular fibrous structure integrally comprising 6 g is obtained. The same applies to the case of three directions. In these cases, the upper tubular part 3
b or the lower tubular portion 3c may be omitted.

(Effects of the Invention) In this invention, the warp direction tubular portion, the weft direction tubular portion, and their intersections are all formed into an integrated structure in which the warp threads and the weft threads intersect. The boundary between the longitudinal tubular part and the intersection is They are connected by warp threads, and the boundary between the tubular part and the crossing part in the weft direction is connected by weft threads. In addition, in the tubular part in the warp direction, the weft yarns run in a zigzag pattern in the circumferential direction to connect all the warp yarns, and in the tubular part in the weft direction, the warp yarns pass in the circumferential direction and connect all the weft yarns. Therefore, there are no seams in any part. Since the adjacent weft threads of each part are laminated with alternating directions so as to intersect with each other, the mutual bond between the warp threads and weft threads is strong, and the shape is stable and does not easily collapse. Since the tubular portion and the intersection portion are organized in the same woven fabric, the arrangement density of the warp and weft yarns is uniform in each portion, and no strength unevenness occurs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the details of the structure of the first embodiment of the present invention, FIG. 2 is a perspective view showing the outline of FIG. 1, FIG. 3 is a perspective view showing the appearance of the first embodiment, 4 is a perspective view showing the details of the organization of the second embodiment, FIG. 5 is a perspective view showing the outline of FIG. 4, and FIG.
FIG. 7 is a perspective view showing details of the structure of the third embodiment; FIG. 8 is a perspective view schematically showing the structure of FIG. 7; FIG. 9 is a perspective view of the third embodiment. FIG. 10 is a perspective view showing an outline of the structure of the fourth embodiment, FIG. 11 is a perspective view showing the external appearance of the fourth embodiment, and FIG. 12 is a perspective view showing an outline of the structure of the fifth embodiment. FIG. 13 is a perspective view showing the external appearance of the fifth embodiment, and FIG. 14 is a perspective view showing the external appearance of the sixth embodiment. 3: warp, 4: weft, 5b, 5c, 5d,
5e: Open end, 6a, 1a, 2a: Intersection, 6
b, 1b, 2b, 6c, 1c, 2c: vertical tubular portion, 6d, 1d, 2d, 6e, 1e, 2e,
6f, 6g: Tubular portion in the horizontal direction.

Claims (1)

[Scope of Claims] 1. At least two tubes each consisting of a large number of warp yarns and weft yarns arranged substantially perpendicularly in a cross shape,
It is formed in a cross-tubular shape crossed in a T-shape, L-shape, etc., and the weft threads meander between the warp threads of the warp threads in the warp direction tubular part, the weft direction tubular part, and these intersections, and the adjacent weft threads They are laminated with alternating directions so as to intersect with each other, and in the warp direction tubular section, the above-mentioned weft threads run in the circumferential direction and connect all the warp threads in a tubular shape, and the weft threads in the weft direction tubular section and the above-mentioned intersection In the weft section, the above-mentioned weft threads run across the entire width and tie all the warp threads between them in the weft direction, and in the tubular part in the weft direction, the warp threads run circumferentially and tie all the weft threads in a tubular shape. A cross-tubular fiber structure characterized in that the warp yarns are passed through the tubular portion and the intersection portion over the entire length thereof, and all the weft yarns therebetween are connected in the warp direction. 2. The intersecting tubular fiber structure according to claim 1, wherein the warp threads of the tubular portion in the weft direction are continuous in the form of a single helix. 3. The intersecting tubular fiber structure according to claim 1 or 2, wherein adjacent warp yarns inserted into the warp-direction tubular portions and intersecting portions are connected at one end. 4. The intersecting tubular fiber structure according to any one of claims 1 to 3, wherein adjacent weft yarns laminated in the weft direction tubular portion and the intersecting portion are connected at one end. 5. The weft threads of the weft-direction tubular portions are all laminated to the same length, and the weft-direction tubular portions are formed perpendicularly to the warp-direction tubular portions. The crossed tubular fiber structure according to any one of the above. 6. Claims 1 to 6, in which the weft yarns of the weft-direction tubular portions are laminated with varying lengths in order, and the weft-direction tubular portions are formed in a diagonal cross shape with respect to the warp-direction tubular portions. 5. The crossed tubular fiber structure according to any one of Item 4.