JPH01174637A - Three-dimensional circular loom - Google Patents

Abstract

PURPOSE:To enable the continuous weaving of a three-dimensional circular woven fabric in high efficiency, by forming a spiral traversing path of a shuttle which delivers a circumferential yarn of a three-dimensional circular woven fabric. CONSTITUTION:A number of shuttle guides 2 are arranged in circular form around a core material 1. A number of yarn beams 4 to supply a radial yarn 3 arranged in radial direction in a three-dimensional circular woven fabric and a number of yarn beam 6 to supply a longitudinal yarn 5 to be arranged in the axial direction along the inner circumference of a circular woven fabric F are arranged in a state to form circular forms at the out side of the shuttle guides. Each shuttle guide 2 is provided with plural stages (4 stages in the figure) of guiding channels 20 extending in a direction perpendicular to the radial direction radiating from the center material 1. The height of the guiding channels 20 are made to be successively lowered to form a spiral path.

Description

[Detailed Description of the Invention] Purpose of the Invention (Industrial Application Field) The present invention is directed to a shuttle that runs through an opening formed by groups of threads arranged radially around a core material that defines the shape of a three-dimensional annular fabric. This invention relates to a three-dimensional annular loom that winds the unreeled yarn as a circumferential yarn around the outer periphery of a core material.

(Prior art) Three-dimensional annular fabrics are used as base materials for fiber-reinforced composite materials with resin or inorganic materials as matrices, and such composite material molded products are 1ffl and have high strength, so they are used in the structures of rockets, aircraft, etc. Its usefulness as a material has been evaluated. In particular, composite materials made by combining carbon fiber, /rA elementary matrix, ceramic fiber/ceramic matrix, etc. can also be used as nozzles for rocket engines and jet engines, which require heat resistance of 1000° C. or higher.

As a three-dimensional annular loom for weaving the three-dimensional annular fabric, US Pat. radial direction yarns arranged in the radial direction and warp direction threads arranged in the axial direction along the inner circumferential surface of the annular fabric are supplied through a jacquard device, and the yarns are arranged in an annular manner inside the jacquard device. By moving the yarn supply body (shuttle) along the arranged rails, the yarn fed out from the yarn supply body is wound around the outer circumferential surface of the mandrel as circumferential yarn arranged in the circumferential direction of the circular fabric to form a three-dimensional ring. A device for manufacturing textiles is opened. .

(Problems to be Solved by the Invention) However, in the conventional device, since the openings for the warp threads are arranged in a single opening, that is, on the same plane, the warp threads are arranged in a set for each layer of the circumferential threads. It is necessary to arrange the threads on the same plane, and the spacing between the warp threads increases, making it impossible to increase the density of the warp system. Furthermore, since the yarn supply body moves only within one plane, there is a problem that the manufacturing speed of the circular fabric is slow.

In order to solve this problem, the inventor of the present invention has devised a method of simultaneously running multiple stages of shuttles that supply circumferential threads, thereby winding the threads unwound from each shuttle as circumferential threads around the outer peripheral surface of the core material in multiple stages. . However, in the case of a configuration in which the shuttle runs in a multi-stage guide path formed in a shuttle guide arranged in an annular manner, it is necessary to take out the shuttle from the guide path when there is no more yarn to be paid out from the shuttle. However, it becomes troublesome to take out the shuttle from inside the guide passage in the middle of a plurality of stacked guide passages. Moreover, the threads used for three-dimensional circular fabrics are generally thick, and the three-dimensional circular fabrics have a large diameter, so the number of circumferential yarn turns formed by the yarn that the shuttle can hold at one time is relatively small. As a result, the shuttle or the bobbin within the shuttle must be replaced frequently, making the above-mentioned inconvenience more noticeable.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, in the openings formed by the threads arranged radially around the core material that defines the shape of the three-dimensional annular fabric, A shuttle guide having a plurality of stages of guide passages was arranged in a ring shape so that the traveling route of the shuttle traveling on the shuttle was spiral-shaped, and the entrance and exit portions of Seattle were provided in the spiral traveling route.

(Function) In the present invention, each guide passage of a shuttle guide is provided with a plurality of stages of guide passages formed at positions corresponding to openings formed by groups of yarns arranged radially around a core material that defines the shape of a three-dimensional annular fabric. As the shuttles run inside, the threads let out from each shuttle are wound around the outer circumferential surface of the core material in multiple stages as circumferential threads. Since the shuttle travel path formed by the guide path is spiral-shaped, the shuttle enters the guide path from the entrance of the spiral travel path and proceeds sequentially through the multiple stages of the guide path toward the exit. The vehicle then travels through the exit section and escapes out of the travel route. Therefore, a three-dimensional annular fabric is continuously woven by sequentially feeding the shuttle into the guide passage from the inlet.

“(Example 1)” Hereinafter, the first example embodying this invention will be described as Nos. 1 to 7.
This will be explained according to the diagram. As shown in FIG. 2, a large number of shuttle guides 2 are arranged in an annular manner around a core 1 that defines the shape of the three-dimensional annular fabric. Outside the shuttle guide 2 is a yarn beam 4 for supplying radial yarns 3 arranged in the radial direction of a three-dimensional annular fabric;
A large number of yarn beams 6 for supplying warp direction yarns 5 arranged in the axial direction along the inner circumferential surface of the annular fabric F are arranged in a ring shape. Further, a thread guide 7 through which the meridional thread 5 is inserted is disposed at a position corresponding to the space between the shuttle guides 2 on the outside of the shuttle guide 2, and a thread guide 7 through which the warp thread 5 is inserted is arranged outside the thread guide 7. Opening device 8 that performs
is located.

As shown in FIG. 4, the opening device 8 has plate-like belts 11 and 12 that alternately move up and down between a pair of upper and lower annular frames 9 and 10 that have a large number of guide grooves 9a and 10a that extend vertically on the outer peripheral surface. Possibly installed. Each annular frame9.
On the outside of the annular frame 9.10, an annular rotating cam 13.14 having cam grooves 13a, 14a formed on the inner circumferential surface is attached to the annular frame 9.10.
Driven gear 15.16 rotatably supported relative to 10
They are each fixed so that they can rotate integrally with each other.

Each driven gear 15.16 is a drive gear 18.19 fitted on a rotating shaft 17 that is rotationally driven by a drive device (not shown).
It meshes with. One of the belts 11 has an engaging convex portion 11a on its upper outer side that engages with the cam groove 138 of the rotating cam 13, and the lower outer side of the other belt 12 engages with the cam groove 14a of the rotating cam 14. A locking convex portion 12a is provided in a protruding manner. As the rotary cams 13.14 are rotated via the driving gears 18.19 and driven gears 15.16, each belt 11.12 moves into the cam groove 138.
It is designed to be sequentially moved up and down according to the shape of 14a.

1 In the shuttle guide 2, a plurality of guide passages M20 (four stages in this embodiment) extending in a direction perpendicular to the radial direction centered on the core material 1 are formed, and each guide passage 20
The guide passage 20 is formed such that the height of the guide passage 20 is gradually decreased.
This creates a spiral running path. As shown in FIG.
However, there is also an exit at the bottom of the shuttle guide 2 to discharge the shuttle 21 out of the guide passage 20! 122b are provided respectively. The shuttle 21 is rotatably equipped with a reel 24 on which a circumferential yarn 23 is wound around the center thereof. A yarn gripping device 25 (shown in FIG. 2) for gripping one end of the circumferential yarn 23 is provided near the entrance.

Additionally, a plurality of permanent magnets 26 are installed on both the left and right sides of the shuttle 21.
are installed in a row along the front and rear. As shown in FIG. 5, each permanent magnet 26 is arranged in such a state that its N[I and S poles are located above and below, respectively. On the other hand, the shuttle guide 2 is formed with a slit 2a that opens the guide passage 20 to the side corresponding to the core material 1, and the permanent magnets 2 are located at positions corresponding to both upper and lower sides of the guide passage 20.
A 1IIIt stone 27 is provided to face the N and S poles of the permanent magnet 26 to maintain the shuttle 21 in a floating state in cooperation with the permanent magnet 6 and to provide a propulsion force.

By sequentially changing the polarity of the electromagnet 27, the shuttle 21 moves within the guide path 20 due to the attraction and repulsion between the permanent magnet 26 and the electromagnet 27. The core material 1 is configured to be movable in its axial direction by a drive mechanism (not shown), and is gradually moved upward as weaving progresses.

Next, the weaving and operation of the three-dimensional annular fabric F by the apparatus configured as described above will be explained. Three-dimensional circular fabric F@
In the case of weaving, first, the radial yarns 3 drawn from the yarn beam 4 are passed through the loops of the belts 11 and 12, with the core material 1 placed at a position where its upper part approximately corresponds to the upper part of the shuttle guide 2. Along with each shuttle guide 2
They are arranged radially with the core material 1 at the center, with the core material 1 passing through the gaps.

or.

The warp direction yarns 5 drawn out from the yarn beam 6 are inserted into the yarn path of the yarn guide 7 and arranged radially around the core material 1.

Then, a large number of shuttles 21 each having a reel 24 on which the circumferential yarn number 3 is wound around the entrance portion 22a of the shuttle guide 2 is prepared, and weaving is started in this state.

Note that one end of the circumferential yarn 23 let out from the shuttle 21 is held by a yarn end grip f! located inside the shuttle guide 2.
The shuttle 21 is introduced into the guide passage 20 from the entrance portion 22a while being held by the l1lf25. The shuttle 21 introduced into the guide passage 20 sequentially moves downward along the spiral-shaped travel path as shown in FIG. It escapes to the outside of the shuttle guide 2 through an exit section 22b provided subsequently.

A length of yarn is wound around the reel 24 so that the thread is unwound while the shuttle 21 reaches the exit section 22b from the entrance section 22a of the travel path. The curled circumferential threads disappear.

Therefore, the three-dimensional annular fabric F woven by the method of this embodiment is formed with the yarn ends of the circumferential yarns 23 protruding from the surface thereof. Each time it is wrapped, or a three-dimensional ring I
IV! After the JF is woven, it is necessary to cut the yarn ends.

13. As shown in factor 7, belts 11 and 12 are connected to shuttle 2.
When one wheel shuttle guide 2 is running, an opening movement is performed such that each guide passage 20 of the wheel shuttle guide 2 is all located within the opening formed by the radial thread 3. Each belt 11, 12 is connected to a rotating cam 13.
．． 14 is operated so as to make one reciprocating motion during one rotation. When the shuttle 21 runs in the guide path 20 from the state shown in FIG. Guide passage 20
The core material 1 is wound around the circumferential surface of the core material 1 so that the material fed out from the shuttle 21 running on the core material 1 becomes the outermost layer. Since the warp threads 5 are each arranged at a position passing between the guide passages 20 provided in four stages, the shuttle 21 passes through the guide passages 20.
By passing through the warp direction thread 5, each warp direction thread 5 always becomes the circumferential direction thread 2.
It is woven between 3 layers. After the shuttle 21 passes through the opening formed by the radial yarn 3, the belt 11
．． 12 is actuated to close the opening and create a new opening, whereby the radial threads 3 are folded back to surround the circumferential threads 23 in cooperation with the warp threads 5. Thereafter, in the same manner, the circumferential threads 23 are sequentially added to the core material 1 in four stages.
As the radial yarns 3 are wound around the outer periphery of the core material 1 and the radial yarns 3 are folded back, the core material 1 is gradually moved upward and a three-dimensional annular fabric F is successively woven.

(Example 2) Next, a second embodiment will be explained according to the eighth factor.

In this embodiment, the spiral running path formed by the guide passage 20 is formed to have a double structure, and each running path has an entrance portion 22a and an exit portion 22b.
This embodiment differs from the previous embodiment in that a is formed. With this configuration, even if the number of stages of the circumferential yarn 23 is four, each shuttle 21 is connected from the inlet part 22a to the outlet part 22.
The length of movement to b is half that of the above example,
The required minimum length of the circumferential yarn 23 held by the shuttle 21 is shortened, and the shuttle 21 can be made smaller.

Note that the present invention is not limited to the above-mentioned embodiments. For example, instead of using attraction and repulsion of a magnet as a method of driving the shuttle 21, as shown in Section 9, a portion of the shuttle guide 2 may be A drive gear '28 is provided to protrude into the guide passage 20, and a mountain part 21a that meshes with the drive gear 28 is formed on the outside of the shuttle 21.
The shuttle 21 may be moved along the guide protrusion 20a of the guide passage 20 by engagement of the teeth 21a with the teeth 21a. In addition, the inlet part 22a and the outlet part 22b are connected by a conveyance path, and the shuttle 21 is configured to removably accommodate a bobbin, and the bobbin of the shuttle 21 that has escaped from the outlet aS22b is replaced with a new bobbin. It may also be configured such that it is fed into the guide passage 20 again from the inlet portion 22a. In general, the shape of the core material 1 or the number of stages of the guide passages 20 may be changed, or the weaving method may be applied to a weaving method in which the structure of the threads woven in a state perpendicular to the circumferential threads 23 is different.

Effects of the Invention As detailed above, according to the present invention, the traveling path of the shuttle for feeding out the circumferential yarn of the three-dimensional annular textile is formed in a spiral shape, and the traveling path is provided with an inlet portion and an outlet portion. Therefore, a three-dimensional annular fabric is continuously woven by sequentially feeding a shuttle holding a length of circumferential thread from the entrance to the guide passage while moving from the entrance to the exit of the shuttle guide. At the same time, the shuttle can be made smaller.

[Brief explanation of the drawing]

Factors 1 to 7 show a first embodiment embodying the present invention, and FIG. 1 is an exploded view of the shuttle guide, and FIG.
The figure is a schematic plan view of a three-dimensional circular loom, FIG. 3 is a schematic side sectional view showing the weaving action, and FIG. 4 is a partial sectional view of the shedding device.
FIG. 5 is a partial sectional view of the shuttle guide, FIG. 6 is a schematic diagram showing the trajectory of the shuttle, and FIG. 7 is a schematic diagram showing the relationship between the trajectory of the belt and the shuttle during one revolution of the rotary cam. FIG. 8 is a schematic diagram showing the movement locus of the shuttle of the second embodiment, and FIG. 9 is a partial plan cross-sectional view showing a modified example. Core material 1, shuttle guide 2, radial yarns 3, warp yarns 5, shedding device 8, guide passage 20, shuttle 21, entrance section 22a, exit section 22b1, circumferential yarn 23, circular woven fabric F. Patent□Applicant: Representative of Jida Automatic Loom Works Co., Ltd.
Person Patent Attorney On 1) Ilho No. 9 vIJ

Claims (1)

[Claims] 1. In a three-dimensional annular loom that winds yarn around the core material as a circumferential yarn, which is unwound from a shuttle running in an opening formed by a group of threads arranged radially around a core material that defines the shape of a three-dimensional annular woven fabric. A shuttle guide having a plurality of stages of guide passages is arranged in an annular manner so that the traveling path of the shuttle traveling within the opening is spiral-shaped;
A three-dimensional circular loom in which the spiral running path is provided with an inlet portion and an outlet portion of the shuttle.