JP7138276B2 - Manufacturing device and manufacturing method for tubular fabric - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus and a method for manufacturing a tubular fabric for weaving by inserting weft yarns between warp yarns arranged at predetermined intervals in the circumferential direction.

Devices for manufacturing tubular fabrics, such as circular looms, have been put into practical use. In such a device, weaving is performed by arranging warp yarns in an annular gauge ring, alternately opening the warp yarns, and inserting the weft yarns into the opened spaces. For example, in Patent Document 1, a large number of plate-shaped objects with fixed leads are arranged on the periphery of the shuttle track on which the shuttle for inserting the weft runs, and gears provided on the shuttle are engaged with the edges of the plate-shaped objects. It is described that it is made to run by a magnet. Further, Patent Document 2 describes that a discontinuous guide rail is formed at a gate through which the shuttle travels, and wheels attached to the shuttle are engaged with the guide rail to support the shuttle. Further, Patent Document 3 describes that the warp holders are arranged in two groups in a ring shape and the weft inserting mechanism is moved to the space between the two groups.

JP-A-58-126341 JP-A-2-293440 JP 2013-87377 A

In Patent Literature 1, a magnet is used to make the shuttle run, but when the shuttle runs, it comes into contact with the warp yarns, which may damage the warp yarns. For example, when weaving using a tape yarn obtained by opening a fiber bundle made of carbon fiber, the carbon fiber tends to become fluffed or broken due to contact with the tape yarn, and the tape yarn does not come into contact with the running tape yarn. should be treated as such.

In Patent Document 2, wheels attached to the shuttle are engaged with guide rails to make the shuttle run. contact becomes unavoidable. Further, in Patent Document 3, the weft insertion operation is performed by moving the warp holder, but the weft insertion mechanism is arranged outside the warp holder, resulting in a complicated mechanism and a large size device. Transformation is inevitable.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a manufacturing apparatus and a manufacturing method for a tubular fabric that can perform weft insertion without damaging warp yarns.

A tubular fabric manufacturing apparatus according to the present invention includes a warp feeding section that feeds a plurality of warps so as to be arranged at predetermined intervals in a circumferential direction inside an annular guide section and that opens and closes the warp threads, and a weft thread. a weft feeding section that feeds along the guide section and inserts between the open warps, and a woven portion that is woven by inserting the weft while opening and closing the warp to the guide section. and a transfer section for transferring the weft along the central axis of the weft, wherein the weft feeding section is located between the weft feeding section that feeds the weft and the warp that opens and closes. and a plurality of arranged moving means, wherein the moving means are arranged along an annular space formed by opening the warp yarns, and the yarn feeding section has the moving means arranged therein. The moving path is rotated in the circumferential direction of the central axis by the moving means. Further, the movement path is set in an annular shape with a diameter two to five times the outer diameter of the guide portion. Further, the moving means includes a conveying roller arranged between the warp yarns that open and close, and the yarn feeding section rotates while being supported by the conveying roller. Further, a guide portion for guiding the yarn feeding portion along the movement path is provided inside or outside the movement path. Further, the guide section includes a guide roller disposed between the warp yarns that open and close, and the yarn feeding section includes a guided member that abuts on the guide roller. Further, a driving means is provided for driving the moving means to move the yarn supplying section.

In the method for manufacturing a tubular fabric according to the present invention, a plurality of warp yarns arranged at predetermined intervals in the circumferential direction are woven with respect to an annular guide portion by inserting the weft yarns while opening and closing the opening, and the woven portion is woven by the guide portion. A method for manufacturing a tubular fabric that is transported along the central axis of the weft and woven into a tubular shape, wherein the yarn feeding section feeds the weft by a plurality of moving means arranged between the warps that open and close. is rotated in the circumferential direction of the central axis to insert the weft. Further, the moving means is arranged in a ring having a diameter two to five times the outer diameter of the guide portion, and drives the moving means to rotate the yarn feeding portion.

Since the present invention has the above configuration, the weft insertion operation can be performed without damaging the warp yarns.

1 is a schematic configuration diagram of a tubular fabric manufacturing apparatus according to the present invention; FIG. It is a schematic block diagram which looked at the manufacturing apparatus shown in FIG. 1 from the transfer direction A along the central axis O. FIG. FIG. 2 is a schematic cross-sectional view of the manufacturing apparatus shown in FIG. 1 as seen from a direction orthogonal to a central axis O; It is a partially enlarged view showing an example of a moving means using a conveying roller. FIG. 4 is a partially enlarged view of the moving means as seen from the moving direction and a partially enlarged view of the warp thread T from the insertion direction. FIG. 6 is a partially enlarged view of a modification of the moving means shown in FIG. 5; It is a partially enlarged view regarding another modification of a moving means. It is a partially enlarged view regarding another modification of a moving means. FIG. 11 is a partially enlarged view of still another modified example of the moving means; FIG. 10 is a partially enlarged view of the moving means shown in FIG. 9 as seen from the moving direction; Partially enlarged view of a modification of the example shown in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments according to the present invention will be described in detail. It should be noted that the embodiments described below are preferred specific examples for carrying out the present invention, and thus various technical limitations are made. Unless otherwise specified, these forms are not intended to be limiting.

FIG. 1 is a schematic configuration diagram of a tubular fabric manufacturing apparatus according to the present invention, FIG. 2 is a schematic configuration diagram of the manufacturing apparatus shown in FIG. 2 is a schematic cross-sectional view seen from a direction perpendicular to the central axis O. FIG.

The manufacturing apparatus 1 includes a warp feeding section 3 that feeds a plurality of warps T inside an annular guide section 2 so as to be arranged at predetermined intervals in the circumferential direction and that opens and closes the warp threads T, and a guide section for feeding the weft Y. A weft feeding section 4 feeds the weft along the warp 2 and is inserted between the open warps T. A transfer section 5 for transferring along the central axis O is provided.

In this example, the warp T and the weft Y are tape yarns formed by opening long fibers such as carbon fibers to a predetermined width and forming them into a tape shape. When weaving a tubular fabric using such tape yarn, it is required to avoid damage such as cutting or peeling of long fibers due to contact with the tape yarn, or twisting and deformation of the tape yarn during transportation. be done. A prepreg tape in which a carbon fiber bundle is impregnated with a resin may be used.

In this embodiment, the width of the warp threads T is preferably 2 mm or more, more preferably 5 mm or more. The tubular fabric produced in this embodiment is suitable for industrial materials, and the fiber bundles used for the warp T and the weft Y are reinforcing fiber bundles such as carbon fiber bundles, glass fiber bundles, and aramid fiber bundles. It is used according to the purpose. Moreover, it is preferable to use polyester fiber bundles having a large fineness for industrial materials such as civil engineering applications. These reinforcing fiber bundles are large fineness fiber bundles having a flat shape and a fiber width of 2 mm or more.

The annular guide portion 2 has a circular cross section so that the warp threads T can be smoothly inserted inside. Note that the guide portion 2 may have a cross-sectional shape other than a circular shape, such as an elliptical shape, and is not particularly limited.

The warp feeding section 3 includes a guide roller 31 for guiding the warp T sent out from the warp feeding section 30 on which the warp T is wound and set, and a heald 32 for shedding the warp T guided by the guide roller 31. The warp yarn T is fed from the heald 32 to the inner side of the annular guide portion 2 . The heald 32 is oscillated in a direction along the central axis O by a driving device (not shown) such as a motor while holding the warp T between a pair of rollers. When the heald 32 is positioned parallel to the guide portion 2, the warp T is closed.

The guide rollers 31 and healds 32 provided for each warp yarn T are arranged in the circumferential direction around the central axis O when viewed from the direction of the central axis O. direction is set. The warp yarns T fed to the inner side of the guide portion 2 are arranged at predetermined intervals in the circumferential direction of the guide portion 2 .

The weft feeding section 4 includes a yarn feeding section 40 which is set by winding the weft Y around a bobbin, a guide roller 41 which guides the weft Y fed from the yarn feeding section 40, and a weft Y which is guided by the guide roller 41. is provided along the guide portion 2 and inserted between the warp yarns T opened close to the inner side of the guide portion 2. - 特許庁The weft yarn Y is fed while applying a constant tension by rolling and picking up. By feeding the weft Y by rolling and picking up, twisting and width shrinkage of the weft Y are reduced, and a high-quality fabric can be woven.

In order to guide the weft Y along the circumferential direction of the guide portion 2 without twisting the weft Y, the insertion roller 42 has a peripheral surface that guides the weft Y so as to be parallel to the central axis O. As shown in FIG. In particular, when the weft Y is a wide yarn such as a spread yarn, the weft Y tends to be twisted when the weft Y is guided so as to be wound along the circumferential direction of the guide portion 2 . Therefore, by setting the guide surface of the insertion roller 42 so as to be parallel to the central axis O, the weft Y is inserted between the warps T without being deformed such as being twisted or bent, and is in close contact with the warp T. This makes it possible to stably weave.

The weft yarn Y is woven by rotating the movement path set along the open annular space of the warp yarn T in the circumferential direction of the central axis O of the yarn feeding unit 40 . The guide roller 41 and the insertion roller 42 are placed on a support (not shown) together with the yarn feeding section 40 so as to rotate integrally. A plurality of conveying rollers 60 arranged between the warp yarns T that open and close are provided as moving means for moving the yarn feeding section 40 along the moving path. The transport roller 60 is rotatably supported by an annular support rail 61, and the support rail 61 is arranged concentrically with the guide section 2 to set a movement path.

The transport rollers 60 are arranged between the warp threads T so as not to come into contact with the warp threads T during the swinging range of the warp threads T due to the opening and closing operation. The number of warps T to be arranged can be set to a number equal to or less than the number of warps T, and may be arranged for each of a plurality of warps T according to the configuration of the moving means, and is not particularly limited.

The support rail 61 preferably has a diameter two to five times the outer diameter of the guide portion 2 . If the diameter of the support rail 61 is smaller than twice the outer diameter of the guide portion 2, the space between the warp threads T is narrow and it is difficult to secure a space for arranging the transport rollers 60. FIG. Further, if the diameter of the support rail 61 is more than five times the outer diameter of the guide portion 2, the running distance of the warp T becomes longer, and it becomes difficult to keep the tension necessary for the opening and closing operation of the warp T at a constant level. , it becomes difficult to perform a stable weaving operation.

When the width of the warp threads T is 2 mm or more, more preferably 5 mm or more, the distance between the warp threads T is widened at a position where the outer diameter of the guide portion 2 is twice or more, and the transport rollers arranged between the warp threads T are widened. 60 can be arranged with a larger diameter.

For example, when the yarn width is 2 mm, the interval between the warp yarns T is 2 mm at the position where the outer diameter of the guide portion 2 is twice the outer diameter, and the interval between the warp yarns T is 8 mm at the position where the outer diameter of the guide portion 2 is five times the outer diameter. When the yarn width is 5 mm, the interval between the warp yarns T is 5 mm at the position where the outer diameter of the guide portion 2 is twice the outer diameter, and the interval between the warp yarns T is 20 mm at the position where the outer diameter of the guide portion 2 is five times the outer diameter. Since the transport roller 60 preferably has a diameter of 2 mm or more in order to support the weight of the weft feeding section and rotate smoothly, it is preferable that the width of the warp T is 2 mm or more so that the interval between the warp threads T can be set wide.

The wider the yarn width, the smaller the diameter of the support rail 61 that supports the weft feeding section 4, which makes it easier to control the tension of the warp T at the opening and closing opening, enabling high-speed and smooth weaving.

FIG. 4 is a partially enlarged view showing an example of moving means using the conveying roller 60. As shown in FIG. In this example, the conveying roller 60 is rotationally driven by a driving motor 62 to move the yarn supplying section 40 . A driven pulley 60a is attached to each rotating shaft of the conveying rollers 60, and an endless transmission belt 60b is wound between the driven pulleys 60a of the adjacent conveying rollers 60. As shown in FIG. Therefore, the conveying rollers 60 are synchronously driven to rotate in the same direction. The driving motor 62 is arranged outside the swinging range of the opening and closing operation of the warp T, and the driving belt 62b is positioned between the driving pulley 62a attached to the driving shaft and the driven pulley 62c interlocked with one conveying roller 60. is suspended.

FIG. 5 is a partially enlarged view (FIG. 5(a)) of the moving means viewed from the moving direction and a partially enlarged view (FIG. 5(b)) viewed from the insertion direction of the warp threads T. FIG. The conveying roller 60 is arranged between the warp threads T and rotatably supported by a shaft support member 61 a erected on the support rail 61 . Since the warp threads T oscillate between the shaft support members 61a during the opening and closing operations, the warp threads T can smoothly perform the opening and closing operations without being affected by the conveying rollers 60. FIG. Another driven pulley 62d is attached to the rotating shaft of the driven pulley 62c that interlocks with the driving pulley 62a. A transmission belt 62e is wound between it and 60c. Therefore, by rotationally driving the drive motor 62, one conveying roller 60 is rotationally driven together with the driven pulley 60c via the drive belt 62b, the drive pulleys 62c and 62d, and the transmission belt 62e. When one conveying roller 60 is rotationally driven, the other conveying rollers 60 are interlocked and rotationally driven via the transmission belt 60b. The driving motors 62 are arranged for each of a predetermined number of conveying rollers, and the plurality of driving motors 62 are synchronously driven to rotate, so that the conveying rollers 60 as a whole are simultaneously rotated and moved. can also

In the yarn feeding section 40, the rotating shaft of the bobbin around which the weft Y is wound is supported by a support 40a, and a contact section 40b that contacts the conveying roller 60 is formed on the bottom of the support 40a. The yarn feeding section 40 is set in a state in which it is movably placed on a plurality of conveying rollers 60, and the contact section 40b is pushed out in the movement direction by the simultaneous rotation of the conveying rollers 60 as a whole. , the yarn supplying section 40 moves at a predetermined moving speed.

FIG. 6 is a partially enlarged view of a modification of the moving means shown in FIG. In this example, a plurality of wheels 40c are rotatably attached to the bottom of the support 40a. The yarn feeding section 40 is in contact with the conveying roller 60 via a plurality of wheels 40c, and rotates so that the wheels 40c are pushed out in the moving direction by the simultaneous rotation of the conveying roller 60 as a whole. The contact surfaces of the wheel 40c and the conveying roller 60 are both in a surface state in which the frictional resistance is high, so that the rotation of the conveying roller 60 allows the yarn supplying section 40 to move smoothly.

The shape of the conveying roller 60 and the wheel 40c can be changed as appropriate so that the yarn supplying section 40 can rotate smoothly around the guide section 2. It can also be in a state inclined to

7 and 8 are partially enlarged views of another modification of the moving means. In the example shown in FIG. 7, the conveying roller 60 has a groove 60d in which the wheel 40c is fitted is formed on the outer peripheral surface, and the wheel 40c moves in the groove 60d to prevent derailment and prevent movement. can be done with certainty. In the example shown in FIG. 8, in the example shown in FIG. 7, the yarn feeding portion 40 has an extension portion 40d that protrudes inward from the inner surface of the support 40a. Auxiliary wheels 40e are rotatably attached as movement auxiliary means. The auxiliary wheel 40e has a plurality of contact members 63 erected inside the pivot member 61a. will come to Therefore, the yarn supplying section 40 moves while being supported by the contact member 63 on the inner side, so that the moving operation can be performed stably.

FIG. 9 is a partially enlarged view of still another modified example of the moving means, and FIG. 10 is a partially enlarged view of the moving means shown in FIG. 9 viewed from the moving direction. In this example, a guided portion 43 extends outward from the outer surface of the yarn feeding portion 40, and the guided portion 43 is sandwiched between a plurality of pairs of guide rollers 70 arranged inside and outside at predetermined intervals. to move it.

In the yarn feeding section 40, the rotating shaft of the bobbin around which the weft Y is wound is supported by a support 40a, and a contact section 40b that contacts the conveying roller 60 is formed on the bottom of the support 40a. The conveying roller 60 is rotatably supported on the upper part of the shaft supporting member 63 arranged between the warp threads T, and the contact portion 40b is placed on the conveying roller 60 so as to be movable. A side member 43a arranged between the guide rollers 70 is vertically provided on the guided portion 43 extending outward from both ends of the support 40a. The guide rollers 70 are arranged such that the inner guide rollers 70 and the outer guide rollers 70 are arranged concentrically with the movement path of the conveying rollers 60 , and the guide path is formed between the inner and outer guide rollers 70 . is formed in a ring. The guide roller 70 is pivotally supported by the shaft support member 71a and arranged so that the rotation axis extends along the vertical direction, and the side member 43a is curved along the guide path. The side member 43a movably sandwiched between the guide rollers 70 moves smoothly along the guide path.

A driven pulley 70b is attached to the bottom of the shaft support member 71a of the guide roller 70 arranged outside, and a transmission belt 71 is wound around the driven pulley 70b of the adjacent shaft support member 71a. Therefore, the outer guide roller 70 rotates in conjunction with the transmission belt 71 . A drive pulley 72c is attached to one shaft support member 71a of the outer guide roller 70, and the drive pulley 72c is interlocked with the drive pulley 72a of the drive motor 72 via a drive belt 72b. .

By rotationally driving the drive motor 72, one guide roller 70 is rotationally driven through the drive belt 72b, and the one guide roller 70 rotates through the transmission belt 71 to rotate the other guide roller 70. are interlocked and driven to rotate. When the outer guide rollers 70 are rotated all at once, the side member 43a sandwiched by the guide rollers 70 is moved, and the yarn feeding section 40 is moved along the movement path at a predetermined speed. start to act.

The drive motors 72 are arranged for each of a predetermined number of guide rollers, and the plurality of drive motors 72 are synchronously driven to rotate, so that the guide rollers 70 as a whole are simultaneously rotated and moved. be able to.

In the example described with reference to FIGS. 9 and 10, the outer guide roller 70 is rotationally driven, but the inner guide roller 70 may be rotationally driven. Alternatively, the entire guide roller 70 may be arranged inside the moving path to guide the yarn supplying section 40 . In addition, although the contact portion 40b is placed on the conveying roller 60 to move the yarn feeding portion 40, wheels may be attached to the bottom portion of the contact portion 40b so that the moving operation can be performed smoothly. It is also possible to use known moving means as needed.

FIG. 11 is a partially enlarged view of a modification of the example shown in FIG. In this example, similarly to the example shown in FIG. A curved side member 43a is attached along the guide path. The guide rollers 70 are paired with the guide rollers 70 arranged inside the side member 43a and the guide rollers 70 arranged outside the side member 43a, and are arranged concentrically with the movement path of the conveying roller 60 every 30 degrees. The guide rollers 70 are rotated by driving the outer guide rollers 70 through a drive pulley 72a and a drive belt 72b by driving the drive motor 72 to rotate.

The transfer section 5 includes a nip roller 50 and a take-up roller 51. The nip roller 50 transfers the cylindrical woven portion W woven in the guide section 2 in the transfer direction A and folds it in two. As the pressure contact continues, the winding roller 51 winds up the tubular fabric formed into a sheet by the pressure contact.

As described above, weaving is performed by inserting a plurality of warp yarns T arranged at predetermined intervals in the circumferential direction with respect to the annular guide portion 2 and inserting the weft yarn Y while opening and closing the opening, and weaving the weaving portion along the central axis of the guide portion 2. When the weft yarns are transported along the O and woven into a tubular shape, the weft yarns Y are fed by using moving means such as a plurality of conveying rollers arranged between the warp yarns T that open and close. Since the weft Y is inserted by rotating it in the circumferential direction of the axis O, the weft insertion operation can be performed without damaging the warp T.

[Example 1] In the manufacturing apparatus shown in Fig. 1, a tubular woven fabric was manufactured by a tubular woven fabric manufacturing apparatus incorporating the weft feeding section shown in Fig. 11 . The inner diameter of the annular guide portion 2 was set to 450 mm in diameter (the length of the inner circumference is about 1414 mm). The warp yarns T and weft yarns Y used in the production are as follows. Warp T; carbon fiber bundle; T700SC-50C-12K (manufactured by Toray Industries, Inc., width approx. 5 mm), number 250 Weft yarn Y; carbon fiber bundle; T700SC-50C-12K (manufactured by Toray Industries, Inc., width approx. 5 mm)

The warp yarns T were fed to the inner side of the guide portion 2 and arranged so as to be inserted at equal intervals in the circumferential direction. As the guide roller 70 rotates, the weft feeding section 4 rotates around the guide section 2 , and the weft Y is unwound from the weft feeding section 40 and fed to the guide section 2 . The insertion speed of the weft Y was set to 60 threads/minute. The transfer speed in the central axis direction of the weaving portion was set to about 300 mm/min, and a tubular fabric (circumferential length of about 1414 mm) was continuously woven.

In the manufactured tubular fabric, the warp T and the weft Y had no width shrinkage, and no twist was observed. It was confirmed that high-quality tubular fabrics were stably produced.

DESCRIPTION OF SYMBOLS 1... Manufacturing apparatus for tubular fabric, 2... Guide part, 3... Warp feeding part, 4... Weft feeding part, 40... Yarn feeding part, 43... Guided Part 60 Conveying roller 70 Guide roller 5 Transfer part

Claims (8)

A warp feeding section that feeds a plurality of flat or tape-shaped warps so as to be arranged at predetermined intervals in the circumferential direction inside an annular guide section and opens and closes the warp, and a flat or tape-shaped weft. a weft feeding section that feeds along the guide section and inserts between the open warps, and a woven portion that is woven by inserting the weft while opening and closing the warp to the guide section. and a transporting section for transporting the weft along the central axis of the weft, wherein the weft feeding section includes a weft feeding section for feeding the weft and a weft fed from the weft feeding section . a guide roller that guides the weft, and a guide surface that is set to be parallel to the central axis, and the opening that guides the weft guided by the guide roller along the guide portion. An insertion roller inserted between the warp yarns and a plurality of moving means arranged between the warp yarns for opening and closing are provided, and the moving means move along an annular space formed by opening the warp yarns and the yarn supplying section is rotated in the circumferential direction of the central axis by the moving means along the moving path on which the moving means are arranged. 2. The apparatus for manufacturing a tubular fabric according to claim 1, wherein said moving path is set in an annular shape with a diameter two to five times the outer diameter of said guide portion. 3. The tubular fabric according to claim 1, wherein the moving means includes a conveying roller arranged between the warp yarns that open and close, and the yarn feeding section rotates while being supported by the conveying roller. manufacturing equipment. 4. The apparatus for manufacturing a tubular fabric according to any one of claims 1 to 3, wherein a guide portion for guiding the yarn supplying portion along the movement path is provided inside or outside the movement path. 5. The tube according to claim 4, wherein the guide section includes a guide roller disposed between the warp yarns that open and close, and the yarn feeding section includes a guided member that abuts on the guide roller. Manufacturing equipment for shaped fabrics. 6. The apparatus for manufacturing a tubular fabric according to claim 1, further comprising driving means for driving said moving means to move said yarn feeding section. A plurality of flat or tape-shaped warp yarns arranged at predetermined intervals in a circumferential direction with respect to an annular guide portion are woven by inserting the flat or tape-shaped weft yarns while opening and closing the mouth, and the woven portion is woven by the guide portion. A method for producing a tubular fabric that is transported along the central axis of the weft and weaved into a tubular shape, wherein the yarn feeding section feeds the weft by a plurality of moving means arranged between the warps that open and close. is rotated in the circumferential direction of the central axis, the weft sent out from the yarn supplying section is guided by a guide roller, and the guiding surface is set to be parallel to the central axis by the insertion roller. A method for manufacturing a tubular fabric, wherein the weft thread guided by a roller is guided along the guide portion and the weft thread is inserted between the open warp threads . 8. The moving device according to claim 7, wherein the moving device is arranged in a ring having a diameter two to five times the outer diameter of the guide section, and the moving device is driven to rotate the yarn feeding section. A method for manufacturing a tubular fabric.

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