JP2023097628A - Optical fiber woven fabric and manufacturing method thereof - Google Patents

Abstract

To provide an optical fiber woven fabric capable of reliably protecting an optical fiber drawn out from a body part of the optical fiber woven fabric without increasing the number of components.SOLUTION: An optical fiber woven fabric comprises: a body part 30 which is formed by single-weaving using a first yarn 42 made of a fiber, and an optical fiber 40 as one of a warp and a weft, and a second yarn 44 made of a fiber as the other of the warp and the weft; and a bag-like hollow weave part 32 which is connected to an end edge 30A in the direction in which the one of the body part 30 extends, is formed by double-weaving using the first yarn 42 and the second yarn 44, and has an open end 32A of the side opposite to the body part 30. A plurality of optical fibers 40 protruding from the body part 30 to the hollow weave part 32 side is arranged inside the hollow weave part 32, and bundled on the end 32A side of the hollow weave part 32.SELECTED DRAWING: Figure 5

Description

TECHNICAL FIELD The present invention relates to an optical fiber fabric woven using optical fibers as one of constituent yarns, and also to a method for producing the optical fiber fabric.

Patent Literature 1 listed below discloses an optical fiber fabric, which is a fabric woven using optical fibers as constituent yarns. A conventional optical fiber fabric, such as the optical fiber fabric described in Cited Document 1, has a structure in which a plurality of optical fibers are pulled out from the edge of the fabric, and the ends of the pulled-out portions are bundled. In addition, in the optical fiber fabric described in Patent Document 1 below, a plurality of optical fibers pulled out from the edge of the fabric are inserted into a shrinkable heat-shrinkable tube at a position that is biased toward one end in the direction along the edge of the fabric. It is characterized by being bundled together. The optical fiber fabric described in Patent Document 1 below has such a structure that the convergence point of the plurality of optical fibers approaches one end side of the edge of the fabric, thereby greatly reducing the exposed area of the bare optical fibers. , space saving, multiple optical fibers are protected by the heat-shrinkable tube and act like a cable with a sheath, so the degree of freedom in placement and handling is greatly increased, and the conventional fan-shaped resin cover etc. are eliminated. It is stated that it is not required and that costs can be reduced.

Japanese Patent Application Laid-Open No. 2020-122240

However, the optical fiber fabric disclosed in Patent Document 1 has a portion where the optical fibers are exposed between the main body of the fabric and the heat-shrinkable tube, so it is difficult to say that the optical fibers are sufficiently protected. In addition, since a heat-shrinkable tube is required to protect the optical fiber, there is a problem that the cost increases due to an increase in the number of parts, and in the process of bundling the optical fiber with the heat-shrinkable tube, there is a risk of excessive bending and poor light guidance. be.

The present invention has been made in view of such circumstances, and an object of the present invention is to reliably protect the optical fibers drawn out from the main body of the optical fiber fabric without increasing the number of parts.

In order to solve the above problems, the optical fiber fabric of the present invention is
An optical fiber fabric woven using optical fibers as a kind of constituent thread,
a main body portion formed by a single weave using the first yarn made of fibers and the optical fiber as one of the warp and the weft, and the second yarn made of the fiber as the other of the warp and weft;
A bag-shaped bag that is continuous from an edge in the direction in which the one of the main body portions extends, is formed by a double weave of the first yarn and the second yarn, and has an open end opposite to the main body portion. a bag weaving department;
with
A plurality of the optical fibers extending from the main body toward the hollow weave portion are arranged inside the hollow weave portion and bundled at the end portion side of the hollow weave portion.

In the optical fiber woven fabric having this structure, the main body part is made up of one sheet of the optical fiber and the first ordinary yarn as one of the warp and the weft, and the second ordinary yarn as the other of the warp and weft. It is formed in a cloth shape, and has a hollow woven portion formed in a seamless state from the main body portion. The hollow weave portion is divided, for example, in a direction perpendicular to the plane of the main body portion, and two pieces of fabric are overlapped in that direction, and the edge of the main body portion (which can also be considered as a boundary between the main body portion and the hollow weave portion) It is formed in a bag-like (cylindrical) shape by joining both ends in the extending direction. The hollow weave portion is woven using only the first yarn and the second yarn without using optical fibers, and the optical fibers are woven so as to be positioned between the upper and lower cloths of the hollow weave portion. It is In other words, the optical fiber woven fabric having this structure can be put in a state in which the entire optical fiber extending from the main body portion is accommodated inside the hollow woven portion, and the optical fiber can be reliably protected. In addition, since the hollow woven portion can be woven in conjunction with the weaving of the main body portion, the number of parts can be reduced compared to the case where the above-described heat-shrinkable tube or the like is provided. The required time can be shortened. Furthermore, the position of the ends of the bundled optical fibers, particularly the position in the direction intersecting the direction in which the optical fibers extend (the direction in which the other of the warp and weft extends) can be changed relatively freely inside the tubular portion. The degree of freedom of utilization of the optical fiber fabric can be improved.

The woven structure of the "main body" in this configuration is not limited as long as it is a single weave, and any of plain weave, twill weave, and satin weave can be adopted. Also, the weave structure of the “hollow weave portion” is not particularly limited as long as it allows a plurality of optical fibers to pass therethrough. However, as will be described in detail later, it is desirable to have a tubular configuration that can be rolled up toward the main body so as not to interfere with the process of bundling the ends of the optical fibers.

Moreover, the "first thread" and the "second thread" in this configuration are not particularly limited, and those made of natural fibers or synthetic resin fibers can be employed. However, if the temperature of the optical fiber rises, it is desirable that it be made of a material that is not affected by the temperature rise.

In the above configuration, at least one optical fiber is alternately woven into one fabric portion and the other fabric portion of the double weave in the hollow weave portion for every predetermined number of adjacent optical fibers inside the hollow weave portion. It can also be configured to be temporarily fixed by

The number of optical fibers extending from the main body is large, and if no countermeasures are taken, a large number of optical fibers will be present in a complicated manner inside the hollow woven portion before the ends of the optical fibers are bundled. In the optical fiber fabric having this configuration, an operator can easily check the number of optical fibers in the manufacturing stage (before processing the ends of the optical fibers), and the quality of the optical fiber fabric can be improved. Further, for example, in the case of a configuration in which the end processing of optical fibers is performed at a plurality of locations, the bundle of optical fibers can be easily divided into a plurality of locations. is.
In addition, for example, in the direction in which the optical fiber extends, the optical fiber fabric of this configuration is, for example, at one or more points in the direction in which the optical fiber extends, the other of the warp and the weft, or a temporary fixing thread is added, It can be configured such that it is temporarily fixed by being woven into each of the two fabric portions of the hollow weave portion.

In the above configuration, the optical fiber may be temporarily fixed to the main body side from the center in the direction in which the one extends inside the hollow weave portion.

Since the optical fiber fabric having this structure can be rolled up to the position where the optical fibers are temporarily fixed, it is possible to improve the workability when connecting the ends of the bundled optical fibers to the light source. In addition, when the optical fiber is rolled up to the position where it is temporarily fixed, the optical fiber is in contact with the folded portion of each of the two fabric portions with respect to the opening formed by the hollow weave portion. Therefore, it is possible to more easily confirm the number of optical fibers in the manufacturing stage.

In the above configuration, the optical fiber fabric is used as a skin material covering the surface of a base material that constitutes an interior material for a vehicle, and the hollow woven portion is wound back and fixed to the back side of the base material. can also be

Various parts such as parts attached to the back side of the vehicle interior material and members constituting the vehicle body are present on the back side of the vehicle interior material. The optical fiber fabric having this structure is used as a covering material, and light sources and the like for receiving light from the ends of the tubular fabric and the optical fibers are fixed to the back side of the vehicle interior material. In other words, the entirety of the plurality of optical fibers extending from the main body is covered with the tubular portion, so that the optical fibers can be reliably protected. In other words, the optical fiber woven fabric of the present invention has a structure capable of reliably protecting the optical fibers, and is therefore suitable as a covering material for vehicle interior materials.

Further, in order to solve the above problems, the method for producing an optical fiber fabric of the present invention comprises:
A method for producing an optical fiber fabric in which optical fibers are used as one of constituent yarns, comprising:
(a) a main body portion formed by a single weave in which the first fiber yarn and the optical fiber are used as one of the warp and the weft, and the second fiber yarn is used as the other of the warp and the weft, and (b) the main body (c) a hollow woven portion continuous from an end edge in the direction in which the one of the portions extends and formed into a bag shape by double weaving with the first yarn and the second yarn, through which the optical fiber passes; and a selvage formed by a single weave, continuous from the end edge of the hollow woven portion on the opposite side of the main body portion, with the first yarn and the optical fiber as the one side, and the second yarn as the other side. a weaving process for weaving
a cutting step of cutting off the entire ear portion;
an optical fiber exposing step of rolling up the hollow woven portion toward the main body portion to expose the plurality of optical fibers;
an optical fiber terminal processing step of bundling the terminals of the plurality of optical fibers;
an optical fiber covering step of returning the rolled-up hollow weave portion to cover the optical fiber;
is composed of

According to the method for manufacturing an optical fiber fabric having this configuration, the optical fiber fabric described above can be easily manufactured. In the conventional manufacturing method, the woven fabric portion other than the main body portion may be cut with scissors or the like, and there is a risk that the optical fiber may also be cut. Since it is used as a part to protect the optical fiber, such a process is not necessary, that is, the optical fiber is not accidentally cut, and a high-quality optical fiber fabric can be produced.

In the above-described structure, the weaving step includes, in weaving the hollow weave portion, alternately applying the optical fibers to one cloth portion and the other cloth portion of the double weave in the hollow weave portion for every predetermined number of adjacent optical fibers. It is also possible to have a configuration in which at least one point is woven into and temporarily fixed.

The manufacturing method with this configuration allows the operator to easily check the number of optical fibers, and can improve the quality of the optical fiber fabric. Further, for example, in the subsequent process, when the optical fiber ends are processed at a plurality of locations, the bundle of optical fibers can be easily divided into a plurality of locations.

In the above configuration, the weaving step temporarily fixes the optical fiber to the main body side from the center in the direction in which the one extends inside the hollow weave portion, and the optical fiber exposing step includes the hollow weave portion. It is also possible to roll up the optical fiber to the point where it is temporarily fixed.

In the manufacturing method having this configuration, when the hollow weave portion is rolled up to the position where the optical fiber is temporarily fixed, the optical fiber is folded back on each of the two fabric portions with respect to the opening formed by the hollow weave portion. It is in contact with the part where it is attached. Therefore, it is possible to more easily confirm the number of optical fibers.

According to the present invention, in the optical fiber fabric, it is possible to reliably protect the optical fibers pulled out from the main body of the fabric without increasing the number of parts.

FIG. 1 is a diagram showing a vehicle using the optical fiber skin material according to the embodiment of the present invention as seen from the inside of the vehicle; Sectional drawing which expands and shows the principal part of the ornament shown in FIG. 1 is a plan view of an optical fiber skin material according to an embodiment; FIG. FIG. 4 is an enlarged view showing the structure of the main body of the optical fiber skin material shown in FIG. 3; FIG. 4 is a plan view showing the configuration of the hollow weave portion of the optical fiber skin material shown in FIG. Cross-sectional view showing a state in which terminals of a plurality of optical fibers are connected to a light source device A plan view of a fabric formed in a weaving process A plan view showing the fabric after the cutting process Schematic view of the inside of the hollow weave part in the fabric after the cutting process Top view showing the fabric after the optical fiber exposure process Cross-sectional view schematically showing the fabric after the optical fiber exposure process A diagram showing the woven fabric after the optical fiber exposing process as seen from the opening side of the hollow woven portion. A plan view showing a woven fabric after an optical fiber end processing step

An optical fiber fabric according to an embodiment of the present invention is an optical fiber skin material 10 used as an interior material for a vehicle (automobile) as a vehicle. First, a vehicle interior material (vehicle interior material) in which the optical fiber skin material 10 is used will be described. The vehicle interior material is a door trim 14 that constitutes the interior surface of a side door 12 of a vehicle. The side door 12 is provided on the driver's seat side (the right side in the vehicle width direction) and the front passenger's seat side (the left side in the vehicle width direction), respectively, and rotates around a rotation shaft extending generally in the vertical direction on the front side of the vehicle. , which can be opened and closed. The side door 12 on the side of the driver's seat and the door trim 14 of the side door 12 on the side of the driver's seat use the optical fiber skin material 10 of the present embodiment (hereinafter sometimes simply referred to as the "skin material 10"). It is In the following description, the door trim 14 of the side door 12 on the side of the driver's seat will be described as a representative.

The door trim 14 constitutes the interior side portion of the side door 12, and is attached to the door inner panel from the interior side of the vehicle interior. The door trim 14 includes a lower board 16, an upper board 17, and an ornament 18, as shown in FIG. An armrest 19 is formed at the upper end of the lower board 16, and the ornament 18 is arranged above the armrest 19. As shown in FIG.

As shown in FIG. 1, the ornament 18 has a longitudinal shape extending in the longitudinal direction of the vehicle. constitutes a part. As shown in FIG. 2, the ornament 18 has a structure in which a plate-shaped base material 20 made of a synthetic resin material such as polypropylene is covered with the skin material 10 . The base material 20 is not limited to the synthetic material, and for example, a mixture of a plant material (kenaf, hemp, flax, sisal, etc.) and a synthetic resin may be used.

As shown in FIG. 2, the base material 20 has a shape in which the outer edge 20A is erected toward the outside of the passenger compartment. It is wrapped around and fixed. A light source device 22 is also fixed to the rear surface of the base material 20 to allow light to enter the optical fiber 40 that constitutes the surface material 10 .

<Structure of optical fiber skin material>
Next, the configuration of the present optical fiber skin material 10 will be described in detail. FIG. 3 shows the skin material 10 in a developed state. The skin material 10 is a woven fabric woven from resin-made side-light-emitting type optical fibers 40 as one of constituent yarns. The skin material 10 is attached to the surface of the base material 20 and mainly has a rectangular main body portion 30 which serves as the skin. As shown in FIG. 4, the main body portion 30 uses an optical fiber 40 and a first yarn 42 made of synthetic resin fiber (polyester in this embodiment) as warps, and a first yarn 42 made of the same material as the first yarn 42 . A single cloth is formed by a single weave using two yarns 44 as weft yarns. In this embodiment, plain weave is used, but twill weave or satin weave may be used.

As shown in FIG. 3, the skin material 10 has a hollow weave portion 32 formed in a bag-like shape, continuing from the edge 30A in the direction in which the warp threads of the main body portion 30 extend (the warp direction: the horizontal direction in FIG. 4). It has Specifically, the hollow weave portion 32 is formed by double weaving using only the above-described first yarn 42 and second yarn 44 without using the optical fiber 40. As shown in FIG. It consists of an upper cloth portion 34 and a lower cloth portion 36 which are two cloth portions overlapping in a direction perpendicular to the surface of the portion 30 . The edges on both sides in the weft direction (vertical direction in FIG. 4) are joined, and the end portion 32A on the side opposite to the main body portion 30 in the weft direction is open, that is, formed into a tubular shape extending in the warp direction. ing.

A plurality of optical fibers 40 not used in the hollow weave portion 32 are positioned between the upper fabric portion 34 and the lower fabric portion 36 . In other words, the plurality of optical fibers 40 extend from the edge 30A of the body portion 30 and are arranged inside the hollow weave portion 32 . The plurality of optical fibers 40 are bound by a metal sleeve 46 on the end portion 32A side of the hollow weave portion 32 . This sleeve 46 is also arranged inside the hollow weave portion 32 .

The sleeve 46 described above is connected to the light source device 22 described above so that light is incident thereon. Specifically, as shown in FIG. 6, the light source device 22 includes a case 50, a light source 52 (for example, an LED or the like) housed in the case 50, and a lens 54 for converging the light from the light source 52. , A sleeve 46 is inserted into a cylindrical portion 50A formed in the case 50, and a tip 46A of the sleeve 46 (that is, a terminal of each optical fiber 40) faces the lens 54. As shown in FIG. Then, in the upholstery material 10 , when connected to the light source device 22 , the tubular portion 50</b>A is also positioned inside the hollow weave portion 32 .

The optical fiber skin material 10 configured as described above covers the area from the point where the optical fiber 40 is pulled out from the main body 30 to the bundled end (sleeve 46) with the hollow woven portion 32 to reliably protect it. be able to. In addition, in the present optical fiber skin material 10, the position of the ends of the bundled optical fibers 40, particularly the position in the weft direction, can be relatively freely changed while the optical fibers 40 are protected inside the tubular portion 32. The position can be adjusted when fixing on the back side of the. In other words, the present optical fiber skin material 10 can be used as the skin of various positions and objects, and the degree of freedom of use is high.

When the optical fiber fabric of the present invention is used as a skin material for a vehicle interior material as in this embodiment, the terminal side of the optical fiber 40 is arranged on the back side of the vehicle interior material. often. On the back side of the vehicle interior material, there are parts arranged on the back side of the interior material, members on the body side of the vehicle, and the like. , should be protected. Therefore, the optical fiber woven fabric of the present invention, the portion of which is arranged inside the hollow woven portion 32, is suitable as a covering material for vehicle interior materials.

<Method for producing optical fiber skin material>
(i) Weaving process Next, a method for manufacturing the above-described optical fiber skin material 10 will be described in detail. In this manufacturing method, first, a plurality of optical fibers 40, first yarns 42 and second yarns 44 made of synthetic resin fibers are prepared, and the fabric 100 shown in FIG. 7 is woven. This fabric 100 is woven using the optical fiber 40 and the first yarn 42 as warp yarns and the second yarn 44 as weft yarns. A single weave is used, and an intermediate portion 106 between them is a double weave (hollow weave) in which both ends in the weft direction (vertical direction in FIG. 7) are joined. In this woven fabric 100 , one end 102 that is long in the warp direction of both ends is a portion that becomes the main body 30 of the optical fiber skin material 10 described above. In addition, the plurality of optical fibers 40 extending from the one end portion 102 are inserted between the upper fabric portion 106A and the lower fabric portion 106B which are double-woven in the intermediate portion 106, is woven at the other end 104 which is shorter in the warp direction (see FIG. 9).

(ii) Cutting Step Next, the other end portion 104 of the fabric 100 is an unnecessary selvage portion of the optical fiber skin material 10, and is cut at the boundary between the selvage portion 104 and the intermediate portion 106 (cutting step). More precisely, it is cut so as to cut off the selvage 104 and the transition from the double weave of the middle portion 106 to the single weave of the selvage 104 . As a result, the configuration shown in FIGS. 8 and 9 is obtained, and the intermediate portion 106 has a bag shape that opens on the side opposite to the one end portion 102 .

(iii) Optical Fiber Exposure Step Next, as shown in FIG. 10, the intermediate portion 106 is rolled up toward the one end portion 102 to expose the plurality of optical fibers 40 arranged in the intermediate portion 106 . As shown in FIGS. 11 and 12, each of the plurality of optical fibers 40 is divided into an upper fabric portion 106A and a lower fabric portion 106A for each predetermined number (for example, 10) adjacent to each other in the weft direction in the intermediate portion 106. It is woven and temporarily fixed alternately with the fabric portion 106B on the side. FIG. 11 is a schematic diagram, and the actual tacking distance is wider than shown in the diagram. Note that the temporarily fixed point 40a that is the furthest from the one end 102 is positioned closer to the one end 102 than the center of the intermediate portion 106 in the warp direction. Incidentally, each optical fiber 40 may be provided with, for example, one to six temporary fixing points.

Due to the existence of this temporary fixing point 40a of the optical fiber 40, the intermediate portion 106 can be rolled up only up to this temporary fixing point 40a, as shown in FIG. In this state, as shown in FIG. 12, the opening of the intermediate portion 106 is expanded vertically. As described above, the plurality of optical fibers 40 are alternately temporarily fixed to the upper cloth portion 106A and the lower cloth portion 106B for each predetermined number. It will be divided into upper and lower parts according to the number of lines. As a result, the number of optical fibers 40 can be confirmed, and the quality of the optical fiber skin material 10 can be improved.

(iv) Optical Fiber Terminal Processing Step Next, a process of bundling the terminals of the plurality of optical fibers 40 is performed. Specifically, for example, the optical fibers 40 are bundled at a position in the weft direction (the center in the weft direction in this embodiment) and bound using a sleeve 46 . A portion of the optical fiber 40 extending from the tip 46A of the sleeve 46 is cut, and the ends of the plurality of optical fibers 40 are aligned. Further, in the embodiment, as shown in FIG. 13, it is configured to be bundled into one, but it may be configured to be divided into a plurality of pieces and bundled. Even in the case of dividing and bundling the plurality of optical fibers 40, according to the present manufacturing method, the plurality of optical fibers 40 are alternately arranged in the upper cloth portion 106A and the lower cloth portion 106B for each predetermined number. Because it is stopped, it can be bundled easily and accurately. Further, as shown in FIG. 12, when the intermediate portion 106 is rolled up, the opening is widened, making it easier to bundle. It has become.

(v) Optical Fiber Coating Step Finally, the rolled-up intermediate portion 106 is put back and the bundled optical fibers 40 are coated to complete the optical fiber skin material 10 shown in FIG. In the conventional manufacturing method, the fabric portion other than the main body portion 30 may be cut, and there is a risk that the optical fiber may also be cut. Since it is formed of hollow weave and used as a portion for protecting the optical fiber 40, a step of cutting the textile is not required. In other words, it is possible to manufacture a high-quality optical fiber fabric without cutting the optical fiber 40 by mistake. Further, since the hollow woven portion 32 (intermediate portion 106) can be woven in conjunction with the weaving of the main body portion 30 (one end portion 102), for example, a heat-shrinkable tube for protecting the optical fibers 40 other than the sleeve 46 can be used. The number of parts can be reduced and the time required for manufacturing the present optical fiber skin material 10 can be shortened as compared with the case of providing such as.

<Other embodiments>
The present invention is not limited to the above embodiments, and can be implemented in various aspects with various modifications and improvements based on the knowledge of those skilled in the art. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the optical fiber 40 constitutes the warp of the main body portion 30 together with the first yarn 42, but may constitute the weft.
(2) In the above embodiment, the optical fiber 40 was temporarily fixed inside the hollow weave portion 32, but this is not essential. In the case of temporary fixing, the optical fiber 40 is temporarily fixed by being woven into the second thread 44, but a structure may be adopted in which a thread for temporarily fixing the optical fiber 40 is added.
(3) The optical fiber woven fabric of the above-described embodiment was used as a covering material for the member constituting the door trim, but the present invention is not limited to this. For example, it can also be used as a skin material for other vehicle interior materials such as ceiling materials and instrument panels. Moreover, it can be used not only for vehicle interior materials, but also for various vehicle interior materials. Furthermore, it can also be used in other industries such as construction.

10... Optical fiber skin material [optical fiber fabric], 14... Door trim [vehicle interior material],
DESCRIPTION OF SYMBOLS 18... Ornament, 20... Base material, 22... Light source device, 30... Main body part, 30A... End edge, 32... Tubular part, 32A... End part, 34... Upper fabric part, 36... Lower fabric part, 40... Optical fiber , 42... First thread, 44... Second thread, 100... Textile, 102... One end [main body part], 104... Other end [selves], 106... Intermediate part [hollow woven part]

Claims (7)

An optical fiber fabric woven using optical fibers as a kind of constituent thread,
a main body portion formed by a single weave using the first yarn made of fibers and the optical fiber as one of the warp and the weft, and the second yarn made of the fiber as the other of the warp and weft;
A bag-shaped bag that is continuous from an edge in the direction in which the one of the main body portions extends, is formed by a double weave of the first yarn and the second yarn, and has an open end opposite to the main body portion. a bag weaving department;
with
An optical fiber fabric, wherein the plurality of optical fibers extending from the main body toward the hollow weave portion are arranged inside the hollow weave portion and bundled at the end portion side of the hollow weave portion. At least one optical fiber is alternately woven into one fabric part and the other fabric part of the double weave in the hollow weave part and temporarily fixed for every predetermined number of adjacent optical fibers inside the hollow weave part. The optical fiber fabric of Claim 1. 3. The optical fiber fabric according to claim 2, wherein the optical fiber is temporarily fixed to the main body side from the center in the direction in which the one extends inside the hollow weave part. The optical fiber fabric is used as a skin material that covers the surface of a base material that constitutes a vehicle interior material,
4. The optical fiber fabric according to any one of claims 1 to 3, wherein the hollow weave portion is wound and fixed to the back side of the base material. A method for producing an optical fiber fabric in which optical fibers are used as one of constituent yarns, comprising:
(a) a main body portion formed by a single weave in which the first fiber yarn and the optical fiber are used as one of the warp and the weft, and the second fiber yarn is used as the other of the warp and the weft, and (b) the main body (c) a hollow woven portion continuous from an end edge in the direction in which the one of the portions extends and formed into a bag shape by double weaving with the first yarn and the second yarn, through which the optical fiber passes; and a selvage formed by a single weave, continuous from the end edge of the hollow woven portion on the opposite side of the main body portion, with the first yarn and the optical fiber as the one side, and the second yarn as the other side. a weaving process for weaving
a cutting step of cutting off the entire ear portion;
an optical fiber exposing step of rolling up the hollow woven portion toward the main body portion to expose the plurality of optical fibers;
an optical fiber terminal processing step of bundling the terminals of the plurality of optical fibers;
an optical fiber covering step of returning the rolled-up hollow weave portion to cover the optical fiber;
A method of manufacturing an optical fiber fabric comprising: In the weaving step, during weaving of the hollow weave portion, at least one point of the optical fiber is alternately applied to one cloth portion and the other cloth portion of the double weave in the hollow weave portion for every predetermined number of adjacent optical fibers. 6. The method of manufacturing an optical fiber fabric according to claim 5, wherein the optical fiber fabric is temporarily fixed by weaving. In the weaving step, the optical fiber is temporarily fixed to the main body side from the center in the direction in which the one extends inside the hollow weave portion,
7. The method of manufacturing an optical fiber fabric according to claim 6, wherein said optical fiber exposing step includes rolling up said hollow weave portion to a portion where said optical fiber is temporarily fixed.

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