JP2014125696A - Fabric material and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fabric material in which a first yarn material capable of being energized is arranged so as to enhance its performance.SOLUTION: A first yarn material 11 is arranged so as to cross a normal portion 40A and a sutured portion 40B. In addition, the first yarn material 11 is arranged in a meandering form in the normal portion 40A, which is formed by a difference in a shrinkage ratio between the first yarn material 11 and a second yarn material 12, and is linearly arranged in the sutured portion 40B.

Description

  The present invention provides a cloth material comprising both a first thread material that can be energized and a second thread material that contracts more easily than the first thread material (for example, a cloth material that can be used as a skin material for a vehicle seat). And a manufacturing method thereof.

It is preferable that the skin material of the vehicle seat can be used as an electrode or a heater of a capacitive sensor in consideration of the convenience of the seat.
For example, since the woven fabric (an example of a cloth material) disclosed in Patent Document 1 is a face material that can be energized, it can be suitably used as the above-described skin material. This fabric includes a first thread material that can be energized and a second thread material that contracts more easily than the first thread material as constituent threads. The first thread material includes, for example, a core thread (conductive thread) and a sheath thread (resin thread material) wound around the core thread in a spiral shape. Further, as the second thread material, a resin thread material that is more easily contracted than the first thread material is used.

In the known technique, both the first yarn material and the second yarn material are used as constituent yarns of the woven fabric. At this time, while using the second yarn material for most of the woven fabric structure (constituent yarn), tissues having different contractility (a structure that easily contracts and a structure that does not easily contract) are alternately formed. Further, the first thread material is disposed between the structures having different contractility.
Next, the fabric is subjected to a finishing treatment (heat treatment) and then used as a skin material. At this time, the second yarn material contracts by heating, so that the first yarn material becomes relatively long. Therefore, in the known technique, the first yarn material is partially pulled and meandered in the surface direction by varying the contraction degree of each tissue. By doing so, even if the first yarn material becomes relatively long, the first yarn material can be prevented from protruding from the fabric surface as much as possible.
Further, in the known technique, by arranging the first thread material in a meandering manner, it is possible to prevent the first thread material from being excessively strained and disconnected when the occupant is seated (when the skin material is pressed).

And in a well-known technique, after cut | disconnecting the above-mentioned textile fabric to a predetermined shape, it sews on another textile fabric using a sewing machine, and produces a skin material.
At this time, a suture line by the sewing machine is formed across the first thread material (conducting thread), and there is a concern that the first thread material may be disconnected by the piercing of the sewing needle. Therefore, typically, after the position of the first thread material is detected by the capacitive sensor member, the sewing needle jumps over the first thread material, for example, by making the pitch interval of the stitches longer than usual. The suturing operation will proceed.

JP 2010-261116 A

By the way, in a well-known technique, the very fine 1st thread | yarn material arrange | positions in a meandering form (a mountain and a valley are formed alternately by front view). For this reason, the sensitivity of the sensor member is increased to detect the conductive yarn. However, in that case, the seam tends to become extremely large, and the structure tends to be inferior in stitchability (strength, design, etc.).
For example, when a suture line is formed in the middle of the first thread material (between peaks and valleys), the sensor reacts at the peak portion or valley portion (first thread material portion arranged upstream in the stitching direction) before reaching the suture line. As a result, the seam becomes extremely large. Further, when forming a suture line obliquely or parallel to the first thread material, the seam becomes extremely large as the sensor reacts to the portion from the peak to the valley.
However, it is possible to arrange all the first thread materials in a straight line, but in that case, there is a risk that the first thread material will be overstrained and disconnected when the skin material (cloth material) is pressed. Tend to).
The present invention has been devised in view of the above points, and a problem to be solved by the present invention is to arrange a first thread material that can be energized with good performance.

As means for solving the above-mentioned problems, the cloth material of the first invention includes a first yarn material that can be energized and a second yarn material that is more easily contracted than the first yarn material as constituent yarns.
In the present invention, the cloth material is formed with a suture site that can be sewn to another fabric material and a normal site different from the suture site adjacent to each other. It is desirable to be able to arrange with good performance (sewability, durability, etc.).
Therefore, in the present invention, the above-described first thread material is disposed across the normal part and the suture part, and the first thread material is disposed in a meandering manner due to a contraction difference with the second thread material in the normal part. The first thread material is arranged in a straight line at the suture site.
According to the present invention, the first thread material is meandered at a normal part (while ensuring suitable durability), and the first thread material is made straight at the suture part, thereby improving the stitchability. Can do.

In the method for producing a fabric material of the second invention, the fabric material of the first invention can be suitably produced in the following first to third steps.
First step: The first yarn material and the second yarn material are knitted and woven to form an original fabric, and the first yarn material is arranged in a meandering manner due to a contraction difference with the second yarn material.
Second step: When forming a linear fragile portion inferior in strength (breaking strength) to other portions of the original fabric, while maintaining the fragile portion in a state in which the first yarn material can be energized (for example, Form the first yarn material in a cross shape (without cutting the conductive yarn).
Third step: Pulling the original fabric in the direction to break the fragile portion, and pulling out the first yarn material while dividing the original fabric in two at the fragile portion, the first yarn at the location of the original fabric adjacent to the fragile portion After making only the material straight, at least one of the two parts of the original fabric is a cloth material.

  According to the first aspect of the present invention, the first thread material that can be energized can be arranged with good performance. Moreover, according to the 2nd invention, the cloth material of the 1st invention can be manufactured suitably.

It is a perspective view of a vehicle seat. It is a front view of a part of skin material. It is sectional drawing of a part of skin material. It is a side view of a part of first thread material. It is the schematic front view of the original fabric which illustrated only some constituent yarns, (a) is a figure before contraction, (b) is a figure after contraction. It is the schematic which shows the manufacturing process of skin material, (a) is a figure which shows a 1st process, (b) is a figure which shows a 2nd process and a 3rd process, (c) It is a figure of three processes. It is a figure which shows the table | surface of a test result.

Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In each of the drawings, a reference symbol F is attached to the front of the vehicle seat, a reference symbol B is attached to the rear of the vehicle seat, a reference symbol UP is provided above the vehicle seat, and a reference symbol DW is provided below the vehicle seat.
The vehicle seat 2 in FIG. 1 has a seat cushion 4, a seat back 6, and a headrest 8. Each of these seat constituent members includes a cushion material (4P, 6P, 8P) that elastically supports an occupant by forming a seat outer shape, and a skin material (4S, 6S, 8S) that covers the cushion material.

<Embodiment 1>
In the present embodiment, a part of the skin material 4S of the seat cushion 4 can be energized, and functions as an electrode or a heater of the capacitive sensor (see FIGS. 1 to 3).
The skin material 4S is created by stitching a plurality of skin pieces (40f, 40s, etc.) described later. At this time, a cloth material is used for a part of the skin pieces (40f), and another cloth material is used for other skin pieces (40s, etc.).
The skin piece (40f) as the cloth material includes both the first thread material 11 that can be energized and the second thread material 12 that contracts more easily than the first thread material 11 as constituent yarns (details of each thread material). Will be described later). Then, while utilizing the difference in contractibility between the first thread material 11 and the second thread material 12, a difference in length (yarn length difference) is generated between the two thread materials, and the first thread material 11 is moved in the surface direction. Arranged in a serpentine shape. In this type of configuration, it is desirable that the first thread material 11 can be placed on the skin piece (40f) as the cloth material with good performance (sewing property, durability, etc.).
Therefore, in the present embodiment, the first thread material 11 is arranged with good performance on the skin piece (40f) as the cloth material in the configuration described later. Hereinafter, each component etc. are explained in full detail.

[Skin material]
The skin material 4S is a planar member and has a plurality of skin pieces (for example, the first skin piece 40f and the second skin piece 40s) as described above (see FIGS. 1 to 3). A pad material 14 (typically a foam resin surface material) and a backing base fabric (not shown) can be arranged in a laminated manner on the back side of each skin piece (the side facing the cushion material) (see FIG. 3). reference).
Here, the first skin piece 40f (an example of a cloth material, which will be described later in detail) is a substantially rectangular planar member that follows the shape of the seat center (seat surface). Further, the second skin piece 40s (an example of another cloth material) is a planar member having a shape that follows the shape of the sheet side portion, and is a cloth (cloth material, knitted fabric, non-woven fabric), leather (natural leather, synthetic leather) or These composite materials can be used.

(First skin piece (cloth material))
In the present embodiment, the first skin piece 40f has a later-described configuration (the first thread material 11, the second thread material 12, and the connection member 30), a normal part 40A, and a stitched part 40B (FIG. 2, FIG. 3 and FIG. 5).
The normal part 40A is a central part (part having a relatively large area) of the first skin piece 40f, and is typically a part on which an occupant can be seated. The stitched portion 40B is a side portion (a portion having a relatively small area) of the first skin piece 40f, and can be sewn to the second skin piece 40s (other cloth material) adjacent to the normal portion 40A. .
The first thread material 11 (which will be described in detail later) that can be energized is disposed across the normal site 40A and the suture site 40B. Therefore, in the present embodiment, the first thread material 11 is arranged in a meandering manner due to a contraction difference from the second thread material 12 in the normal part 40A, and the first thread material 11 is arranged in a straight line in the stitching part 40B. did. In this state, the end portion of the first thread material 11 is electrically connected to the power source 9 via a connecting member 30 (details will be described later), whereby the first skin piece 40f is replaced with an electrode of a capacitive sensor or a heater. Can function as.

Thus, in this embodiment, the durability of the first thread material 11 in the same part can be suitably ensured by meandering the first thread material 11 in the normal part 40A. Further, by making the first thread material 11 straight at the stitched portion 40B, the stitchability of the first skin piece 40f can be improved as will be described later.
In addition, the linear form in this embodiment is the meaning including the state where an amplitude is smaller than the meandering state of the 1st thread | yarn material 11 in the normal site | part 40A other than a complete straight line. The degree of linearity of the first thread material 11 in the sutured portion 40B (how much the amplitude is reduced) can be appropriately set in consideration of the sensitivity of sensing, the detection method, the sewing avoidance method, and the like.

[First thread material]
The first thread material 11 is a thread material having electrical conductivity, and is used as a constituent thread of the first skin piece 40f (cloth material) (see FIGS. 2 to 4).
The first thread material 11 of the present embodiment has a covering structure, and includes a core thread 20 and conductive threads (21, 22) wound around the core thread 20 in a spiral shape. Since the first thread material 11 has a covering structure in this way, when a force is applied to the first thread material 11, the core thread 20 is burdened before the force is applied to the conductive thread (21, 22) as the covering thread. (The load on the conductive yarn can be reduced).
Further, by using the first thread material 11 having the covering structure, it is possible to damage the second thread material 12 described later while avoiding cutting of the core thread 20 as much as possible in the second process described later. By avoiding cutting of the core yarn 20 as much as possible in this way, it is possible to suppress applying a tensile load to the conductive yarn (21, 22) when the first yarn material 11 is linear in the third step described later. it can.
Here, it is desirable to protect the surface of the first yarn material 11 or the conductive yarn (21, 22) by applying a resin coating. When connecting to the connection member 30 (described later), for example, a thermal action (described later) is applied to the first thread material 11 to remove the resin coating.

(Core yarn)
The core yarn 20 is a thread material such as a spun yarn, a filament yarn, a drawn yarn, and a stretch processed yarn (false twisted yarn or buckled yarn) (see FIG. 4). The core yarn 20 can be used by arranging a plurality of yarn materials, or a single yarn material can be used.
The core yarn 20 (material) is not particularly limited, and examples thereof include plant-based and animal-based natural fibers, chemical fibers made of a thermoplastic resin or a thermosetting resin, and mixed fibers thereof.
In natural fibers, cotton, hemp or wool is excellent in texture, so that it is preferably used as a constituent yarn of the first piece 40f (skin material 4S). As chemical fibers, polyester fibers (for example, polyethylene terephthalate filaments) and nylon fibers are excellent in durability, texture and strength, and are therefore preferably used as constituent yarns of the first piece 40f (skin material 4S).

(Conductive yarn)
The conductive yarns (21, 22) are conductive wires that can be energized, and typically have a specific resistance (also referred to as volume resistivity) of 10 ⁰ to 10 ⁻¹² Ω · cm (see FIG. 4).
Here, the “specific resistance (volume resistivity)” is a physical property value used for comparing what kind of material is difficult to conduct electricity, for example, “JIS C2525 7.2.C volume resistivity”. It can be measured in compliance.
Examples of this type of conductive yarn include metal and alloy yarn materials, plated wire materials, and carbon fiber filaments. The plated wire has a non-conductive or conductive wire (core material) and a plated layer of metal or alloy. Carbon fibers are polyacrylonitrile-based carbon fibers (PAN-based carbon fibers) and pitch-based carbon fibers. Among them, filaments of carbon fibers (carbonized fibers, graphitized fibers, graphite fibers) having a firing temperature of 1000 ° C. or higher have good electrical conductivity, and can be suitably used as the conductive yarn of this embodiment.
The conductive yarns (21, 22) can be formed of a single conductive yarn, or can be formed by twisting a plurality of conductive yarns.

(Create the first thread material)
Referring to FIG. 4, the first yarn material 11 is created by winding the conductive yarn (21, 22) around the core yarn 20 in a spiral shape. Here, the number of conductive yarns in the first yarn material 11 is not particularly limited, but can be typically set to an even number such as one (single covering) or two (double covering).
For example, in the present embodiment, the first conductive yarn 21 is wound with Z twist, and the second conductive yarn 22 is wound with S twist (double covering). By winding the conductive yarns 21 and 22 (typically yarn materials that are difficult to shrink) in this manner, the shrinkability of the first yarn material 11 is inferior to that of the second yarn material 12 (described later). . At this time, by making the covering directions of the first conductive yarn 21 and the second conductive yarn 22 different from each other, the structure of the first yarn material 11 is stabilized, and the yarn length difference from the second yarn material 12 (described later) is more reliably ensured. Can be generated.
In addition, by carrying out single covering using either the first conductive yarn 21 or the second conductive yarn 22, the number of parts of the first yarn material 11 can be suppressed and the manufacturing cost or the like can be reduced.

Further, the number of twists of the conductive yarns (21, 22) can be appropriately set according to the thickness (fineness) of each conductive yarn, the number of filaments (single covering, double covering), and the like.
For example, in the case of double covering, the number of twists of the first conductive yarn 21 and the second conductive yarn 22 can be set to a range of 200 to 1500 T / m independently or in a unified manner so that the first yarn material 11 has a desired number of twists. Strength can be imparted.
Here, when the number of twists of the first conductive yarn 21 or the second conductive yarn 22 is less than 200 T / m, the elongation until each of the conductive yarns 21 and 22 is cut tends to be insufficient. If the number of twists of the first conductive yarn 21 or the second conductive yarn 22 is more than 1500 T / m, the rigidity of the first yarn material 11 is increased, and the texture and feel of the obtained first skin piece 40f (cloth material) are increased. May be excessively worse. And it can be set as the 1st thread material 11 provided with the desired performance by setting the twist number of the 1st conductive thread 21 and the 2nd conductive thread 22 in the range of 400-1000 T / m.

[Second thread material]
The second yarn material 12 is a yarn material that is more easily contracted than the first yarn material 11, and can be exemplified by spun yarn, filament, drawn yarn, or stretchable yarn (false twisted yarn or buckled yarn) (FIG. 2 and FIG. 2). In FIG. 6, for convenience, a reference is given to a tissue portion in which the second yarn material 12 is used instead of the individual second yarn material 12).
Examples of the second thread material 12 (material) include plant-based and animal-based natural fibers, chemical fibers made of thermoplastic resin or thermosetting resin, and mixed fibers thereof.
Here, the yarn length difference between the first yarn material 11 and the second yarn material 12 is not particularly limited, but the first yarn material 11 is desirably 10% to 30% longer than the second yarn material 12. If the yarn length difference between the two yarn materials is less than 10%, the first yarn material 11 may not be arranged in a meandering manner. If the difference in yarn length between the two yarn materials is greater than 30%, the first yarn material 11 may be excessively pulled due to the contraction of the second yarn material 12. Here, the term “shrinkage” includes not only the case where the yarn length under a load of about 8.82 mN / dtex is shortened, but also the case where the shrinkage occurs and the structure shrinks like a false twisted yarn.

[Production of fabric material]
In this embodiment, the 1st skin piece 40f (cloth material) can be manufactured suitably by providing the following 1st process-3rd process (refer FIG.5 and FIG.6).
First step: The first thread material 11 and the second thread material 12 are knitted and woven to form a raw fabric 40, and the first thread material 11 is arranged in a meandering manner due to a contraction difference with the second thread material 12.
Second step: When forming the linear weak portion 42 inferior in strength (breaking strength) to other portions of the raw fabric 40 in the raw fabric 40, the weak portion 42 is in a state in which the first thread material 11 can be energized. The first thread material 11 is formed in an intersecting shape while maintaining.
Third step: The original fabric 40 adjacent to the fragile portion 42 is pulled by pulling the original fabric 40 in the direction in which the fragile portion 42 is broken, and pulling out the first thread material 11 while the original fabric 40 is divided into two parts by the fragile portion 42. Only the first thread material 11 at the 40 positions is linear. Then, at least one of the two divided raw fabric portions is defined as a first skin piece 40f (cloth material).

(First step)
In the first step, the raw fabric 40 is created using the first yarn material 11 and the second yarn material 12 as constituent yarns (see FIG. 6A).
For example, when producing the raw fabric 40 as a woven fabric, after warping the second yarn material 12 as a warp, the first yarn material 11 as a weft can be appropriately driven. Moreover, the 1st thread material 11 can also be used as a warp. Moreover, when producing the raw fabric 40 as a knitted fabric (flat knitted fabric etc.), the 1st thread material 11 can be introduce | transduced into some constituent yarns.

In this embodiment, with reference to the structure | tissue structure of Fig.5 (a), the raw fabric 40 which is a substantially rectangular fabric is created. And the part used as the base of the raw fabric 40 is formed with the 2nd thread material (For example, the 2nd thread materials 12a-12c as a warp, The 2nd thread materials 12d-12i as a weft).
At this time, the first yarn material 11 is used for a part of the weft and is woven along the width direction of the base portion. Then, by forming induction points 10a, 10b and restraint points 10c (both described later) with the second thread materials 12a to 12i, the first thread material 11 is arranged in a meandering manner due to a contraction difference from each second thread material. It was decided.
Here, each second thread material (a thread material constituting the induction point and the restraint point) intersecting with the first thread material 11 may be a thread material constituting the surface design of the first skin piece 40f, and is independent of the surface design. May be used. For example, by using each second thread material unrelated to the surface design (not appearing on the surface side) for forming the induction points (10a, 10b) and the restraint points 10c, the influence on the surface design of the first thread material 11 is achieved. It can be eliminated as much as possible.

(Induction point)
The guide points (first guide point 10a, second guide point 10b) are portions that allow displacement of the first thread material 11 in the surface direction of the original fabric 40, and a part of the warp threads (second thread materials 12a, 12c). (See FIG. 5A).
Here, the second thread material 12a and the second thread material 12c are arranged outward from the first thread material 11 (weft), and the jumping of the first thread material 11 from the surface of the original fabric 40 can be restricted.
The first guiding point 10a has a yarn skipping length (a weft skipping amount) on one side of the first yarn material 11 (upper side in FIG. 5) as viewed in the warp extending direction. It is a large part compared with the part. The second guiding point 10b is a portion where the yarn skipping length on the other side of the first yarn material 11 (the lower side in FIG. 5) is larger than the other portions when viewed in the direction in which the warp extends.

(Restriction point)
The restraint point 10c is a region where the range allowing the displacement of the first thread material 11 in the surface direction of the original fabric 40 is smaller than the induction points (10a, 10b) (see FIG. 5A).
The restraint point 10c of the present embodiment is composed of the warp other portion (second yarn material 12b) and is formed between the first induction point 10a and the second induction point 10b. Note that the second thread material 12b is disposed outside the first thread material 11, and can control the jumping of the first thread material 11 from the surface of the original fabric 40.
The constraint point 10c of the present embodiment has a yarn skipping length on one side of the first yarn material 11 smaller than the first induction point 10a when viewed in the direction in which the warp extends, and a yarn on the other side of the first yarn material 11 The flying length is a portion smaller than the second guiding point 10b.

Although the space | interval (length of one period) of the binding point 10c and the induction | guidance | derivation point 10a (10b) is not specifically limited here, About 5-30 mm is preferable, More preferably, it is 10-25 mm. By setting the length of one cycle to about 5 to 30 mm, it is possible to suitably meander the first thread material 11 (conductive thread that has excellent rigidity and is difficult to meander).
Further, one or a plurality of induction points (10a or 10b) can be formed between the adjacent restraint points 10c. Here, since the first yarn material 11 is easily caught when the distance between the adjacent restraint points 10c is increased, warp yarns serving as a plurality of guide points for the wefts may be arranged between the adjacent restraint points 10c. Good. When a plurality of induction points are formed, the yarn skipping length of each induction point can be the same, and the yarn skipping length of each induction point can be matched to the meandering position (amplitude width) of the first yarn material 11. The thickness may be changed as appropriate.

In addition, although the arrangement | positioning number of the 1st thread | yarn material 11 in the raw fabric 40 is not specifically limited, In order to exhibit various functions suitably, several 1st thread | yarn material 11 can be arrange | positioned in parallel with predetermined intervals. Preferred (see FIGS. 2 and 6).
For example, when the first skin piece 40f is provided with a heater function, the interval dimension W1 between the first thread materials 11 can be set to 1 mm to 60 mm. When the first skin piece 40f is provided with a sensor (electrode) function, it is desirable to set the interval dimension W1 between the first thread materials 11 within a range of 60 mm. If the interval dimension W1 between the first thread materials 11 exceeds 60 mm, the sensor function of the first skin piece 40f is deteriorated (capacitance is reduced) and may not function as an electrode. Preferably, the first skin piece 40f has a more suitable sensor function (capacitance) by setting the upper limit value of the interval dimension W1 of the first thread material 11 to 30 mm.

(Finishing process)
Then, after the raw fabric 40 is created, the first yarn material 11 is arranged in a meandering manner due to a contraction difference from each second yarn material by performing a predetermined finishing process (see FIGS. 2 and 5B). ).
Examples of the finishing treatment include a scouring step, a dyeing step, a heat setting step, a texture-out step, a post-processing agent application step, and a finishing setting step, and all of the above-described steps can be performed. A plurality of steps can be omitted.
In each of the above steps, the raw fabric 40 is often subjected to heat treatment (dry heat treatment or wet heat treatment). For example, in the scouring or dyeing step, heat treatment at around 90 to 155 ° C. is often performed. And by this heat processing, each 2nd thread material in the original fabric 40 shrink | contracts in a surface direction. In addition to heat treatment, the second yarn material may shrink in the surface direction by treatment with a chemical agent. The shrinkage of the original fabric 40 is also effective in providing a sense of fabric thickness, imparting stretch, and tailoring.

In the present embodiment, in the above-described finishing process, each second thread material contracts relatively, so that the first thread material 11 (a thread material inferior in contractibility) bends and deforms in a meandering shape (FIGS. 2 and 2). 5 (b)).
At this time, the first thread material 11 bends and deforms in a mountain shape at the guide points 10a and 10b, with the portion restrained at the restraint point 10c as a fulcrum. That is, the first thread material 11 is bent and deformed in a mountain-like manner toward the one side (upper side in FIG. 5) along the first induction point 10a, and the other side (FIG. 5) along the second induction point 10b. Deforms and deforms like a mountain toward the lower side.
As described above, in the present embodiment, the first thread material 11 jumps out from the raw fabric 40 by smoothly meandering the first thread material 11 in the surface direction at the guide points 10a and 10b and the restraint point 10c. It can prevent as much as possible.

(Second step)
In the second step, a linear fragile portion 42 is formed on the original fabric 40 (see FIG. 6B).
Here, the fragile portion 42 is a portion that is inferior in breaking strength to other portions of the original fabric 40, for example, the raw fabric 40 is partially cut or broken or melted and solidified (to be easily cut by carbonization or the like). Can be formed.
In addition, the weak part 42 can be formed by cutting the original fabric 40 continuously (continuous line shape) as in the present embodiment, and is formed by cutting the original fabric 40 partially (broken line shape). You can also
Further, the fragile portion 42 can be formed through the original fabric 40 (for example, a cutting line is formed), and the original fabric 40 can be formed in a non-penetrating state (in a concave shape).

And the weak part 42 is formed in the 1st thread material 11 in the cross shape (for example, orthogonal shape or inclined shape), maintaining the energization possible state of the 1st thread material 11.
In the present embodiment, the first thread material 11 is arranged in a meandering manner in the longitudinal direction of the original fabric 40 (substantially rectangular shape). Therefore, linear weak portions 42 extending in the short direction of the original fabric 40 are formed on both sides of the original fabric 40 and arranged orthogonally to the first thread material 11. At this time, the fragile portion 42 is formed by cutting only the second thread material 12 without cutting the first thread material 11 (particularly the conductive thread) as much as possible, thereby favorably energizing the first thread material 11. Can be maintained.
Further, when the first thread material 11 takes the form of FIG. 4, a large force is applied to the conductive threads 21 and 22 in the subsequent third step by suppressing damage to the core thread 20 as well as the conductive threads 21 and 22. It is preferable that the core yarn 20 can bear and pull the first yarn material 11 without burdening. For this purpose, the first thread material 11 is arranged on the back surface of the woven fabric, and a laser (described later) is irradiated from the front surface to damage only a part of the second thread material 12.

Although the formation method of the weak part 42 is not specifically limited here, It is preferable that it is the method of damaging the 2nd thread material 12, without cut | disconnecting the 1st thread material 11 as much as possible.
As this kind of method, cutting or breakage of the second thread material 12 due to thermal action (laser, heated steam, etc.), cutting or breakage of the second thread material 12 due to physical action (cutter, hot blade, etc.), Examples of the cutting or breakage of the second thread material 12 due to the medicine can be given. In particular, the technique based on thermal action can suitably damage the second thread material 12 without cutting the first thread material 11 as much as possible by appropriate temperature setting (with a relatively simple configuration). desirable.
The type of laser is not particularly limited, and examples include CO ₂ laser, YAG laser, excimer laser, UV laser, semiconductor laser, fiber laser, LD laser, and LD pumped solid state laser. Among these, a CO ₂ laser that has high absorption in organic matter (second yarn material) is preferable.

Here, the width dimension of the fragile portion 42 (the dimension in the longitudinal direction of the original fabric) is not particularly limited, but for example, the width dimension can be set in a range of 0.1 mm to 10 mm.
At this time, by setting the width dimension in a range of 5 mm to 10 mm (with a belt shape), the original fabric 40 can be divided relatively easily in the third step described later. Moreover, the weak part 42 can also be produced efficiently by setting a width dimension to the range of 0.1 mm-less than 5 mm.

(Third process)
In the third step, the original fabric 40 is pulled in the direction in which the fragile portion 42 is broken, and the first thread material 11 is pulled out while the original fabric 40 is divided into two by the fragile portion 42 (see FIG. 6C). By pulling out (stretching) the first thread material 11 in this manner, only the first thread material 11 at the location of the raw fabric 40 adjacent to the fragile portion 42 can be made linear.
In the present embodiment, a pair of jigs T (band-like members) are arranged on the surface of the original fabric 40 with the fragile portion 42 interposed therebetween. At this time, the other fabric 40 is placed on the back surface (position facing the jig T) and restrained in a spot shape, for example, so that the original fabric 40 can be easily stretched. The number of constraining portions on the back surface of the original fabric 40 is not particularly limited, but the tension force tends to increase as the constraining portions increase, and there is a possibility that an excessive load is applied to the first thread material 11.
Then, the pair of jigs T are moved away from each other (the original fabric 40 is pulled in the direction in which the fragile portion 42 is broken), and the first yarn material 11 is pulled out while the original fabric 40 is divided into two parts by the fragile portion 42. . In this way, only the first yarn material 11 of the original fabric 40 portion adjacent to the fragile portion 42 is linear (the stitched portion 40B is formed), and at the same time, the remaining portion is the normal portion 40A.
Here, the length of the tension (the distance between the pair of jigs T) can be adjusted to a length necessary for linearization of the first thread material 11. If the tension is pulled more than necessary, the first thread material 11 is excessively stretched. May cause damage.
Then, at least one of the two divided raw fabric portions is defined as a first skin piece 40f (cloth material). In the present embodiment, one original fabric portion (the central portion of the original fabric 40) is used as the first skin piece 40f, and the other original fabric portion (the side portion of the original fabric 40) is discarded without being used as the skin piece. (To be a waste material 44).

[Connecting member]
Then, the end portion of the first thread material 11 is electrically connected to the power source 9 via the connection member 30. Here, the connection member 30 is a member that electrically connects the first thread material 11 and the power source 9, and can be exemplified by a conductive wire, a conductive tape, and a conductive belt-like cloth body.
In the present embodiment, the connection members 30 (band-shaped cloth bodies) are respectively disposed at both end portions of the first skin piece 40f (end portions of the stitched portion 40B). Each connecting member 30 is electrically connected to both ends of the first thread material 11 while being appropriately fixed to the first skin piece 40f by sewing, welding, adhesion, or the like. Then, the first skin piece 40f (cloth material) can be brought into an energizable state by connecting the pair of connection members 30 to the power source 9 via a power cable (reference number omitted) or the like.

[Creation work of skin material]
Referring to FIG. 3, a skin material 4S is created while sewing a plurality of skin pieces (first skin piece 40f, first skin piece 40f, etc.) with a sewing machine (not shown).
In the present embodiment, a sensor member (not shown) is provided on the sewing machine so that the first thread material 11 disposed in the forward direction of the sewing needle can be detected.
Here, the sensor member has a mechanism capable of detecting the presence or absence of the first thread material 11 (conductive thread), and examples thereof include a magnetic type, an X-ray emission type, and a capacitance type mechanism. The arrangement position of the sensor member is not particularly limited, but can be typically arranged on at least one of the front surface side and the back surface side of the skin material 4S.

In the present embodiment, the first skin piece 40f and the second skin piece 40s are overlapped so as to contact each other on the surface. Next, the side portion (stitched portion 40B) of the first skin piece 40f viewed in the sheet width direction is connected to the side portion of the second skin piece 40s by stitching.
At this time, while moving each skin piece relative to the sewing machine, a sewing needle is inserted into each skin piece at a predetermined pitch to form a suture line SEW composed of a plurality of perforations.
In the present embodiment, since the first thread material 11 is linearly arranged at the suture site 40B, the position of the first thread material 11 can be accurately detected by the sensor member. For this reason, it becomes possible to make the pitch of the seam of the suture line SEW uniform (to prevent it from becoming extremely large as much as possible), and the skin material 4S has a configuration excellent in stitchability (strength, designability, etc.).
Then, after the first skin piece 40f and the second skin piece 40s are stitched together, both skin pieces are expanded in an inwardly folded manner with the sewing location (sewing line SEW) as the base end.

[Use of skin material]
With reference to FIG.1 and FIG.2, the skin material 4S is used as a heater etc., arrange | positioning on the cushion material 4P.
In the present embodiment, by arranging the first thread material 11 in a meandering manner in the center (normal part 40A) of the skin material 4S, the first thread material 11 is excessively tensioned by the pressure when the occupant is seated. It can be prevented as much as possible (preferable durability can be ensured). Moreover, the 1st thread | yarn material 11 can be arrange | positioned in the meandering shape, and moderate stretchability can be provided to the outstanding texture and the skin material 4S.
Moreover, since the seam of the skin material 4S side part (stitching site | part 40B) is gathering as above-mentioned, it is the structure excellent in intensity | strength and design property.
As described above, in the present embodiment, the first thread material 11 is made to be linear at the stitching site 40B while meandering the first thread material 11 at the normal site 40A (while ensuring suitable durability). Sutureability can be improved. As a result, according to the present embodiment, the first thread material 11 that can be energized can be arranged with good performance.

<Embodiment 2>
Since the basic configuration of the second embodiment is almost the same as that of the first embodiment, detailed description of the same configuration is omitted.
In the present embodiment, when creating a woven fabric as the first skin piece (cloth material), a greater number of restraint points are set at the stitching site than at the normal site. By doing so, the first thread material is arranged in a meandering manner at the normal part, but the meandering is prevented at a number of restraint points at the stitching part. For this reason, the amplitude of the first thread material at the suture site can be made smaller than that of the first thread material at the normal site, or can be arranged linearly.
And in this embodiment, the formation position of a stitching | suture site | part can be set freely, for example, it can form in the side edge part and center of a 1st skin piece (cloth material).

Hereinafter, although this embodiment is described based on an example, the present invention is not limited to the example.
[Example 1]
In this example, a first yarn material was prepared using a core yarn and two types of conductive yarns (upper twisted conductive yarn and lower twisted conductive yarn).
Polyethylene terephthalate (PET) yarn (280 dtex / 48f) was used as the core yarn. In addition, a thread material in which seven SUS304 wires (wire diameter: 20 μm) were twisted into a Z twist with a pitch length of 1000 mm (1000 T / m) was used as the lower twisted conductive yarn. Further, as the upper twisted conductive yarn, a yarn material in which seven SUS304 wires (wire diameter: 20 μm) were twisted with a 1.0 mm pitch length (1000 T / m) in S twist was used. Two types of conductive yarns were coated with PFA resin (film thickness 50 μm).
The lower twisted conductive yarn (Z twist) was covered at a pitch length of 2 mm (500 T / m) in the S twist direction with respect to the core yarn. Similarly, the upper twisted conductive yarn (S twist) was covered with a pitch length of 2 mm (500 T / m) in the Z twist direction with respect to the core yarn.

(First step)
In this example, the original fabric of the woven structure (meandering structure) of FIG. 5 was created with the first thread material and the second thread material. At this time, after warping the warp yarn (second yarn material), weaving the weft yarn (second yarn material) with a jacquard loom (representing the pattern), 19 yarns (second yarn material) The first yarn material was driven in one cycle.
As warp yarn (second yarn material), a PET false twisted yarn (84T / 144 filament) and a PET false twisted yarn (167T / 36 filament) were used at a ratio of 1: 1. Further, as the weft yarn (second yarn material), a PET false twisted yarn (167T / 48 filament) and a PET false twisted yarn (336T / 576 filament) were used at a ratio of 1: 1. On the machine, weaving was carried out at 168 vertical and 100 horizontal / 25.4 mm.
Next, the fabric was subjected to a relaxing heat treatment at 90 ° C. for 30 minutes using a flow dyeing machine to shrink the width to 20%, and after raising and raising, the backing agent was applied to the back surface. The dried one was used as the original fabric of Example 1. As a backing agent, an acrylic polymer synthesized from butyl acrylate and acrylonitrile and a flame retardant as a main component were used. The amount of backing agent applied was 50 g / m ² and the drying temperature was 150 ° C. × 1 min.
The finishing density of the raw fabric (woven fabric) of Example 1 was warp / longitude = 220/110 pieces / 2.54 cm. Moreover, the space | interval dimension (W1) between 1st thread materials was 20 mm. The length of one period of meandering was 14 mm.

(Second step)
In this embodiment, a Mitsubishi carbon dioxide laser processing machine (model: 2512H2, transmitter model name: 25SRP, laser rated output: 1000 W) was used as the CO ₂ laser. The conditions of the CO ₂ laser were set to a wavelength of 10.7 μm, an output of 600 W, a processing speed of 4.5 m / min, and a focus + 50 mm defocus (defocus).
6B, a pair of jigs was set on the original fabric of Example 1, and then a linear fragile portion was created between the two jigs using a CO ₂ laser. At this time, a CO ₂ laser was irradiated from the surface of the original fabric to form a continuous line-shaped weakened portion (cut line having a width dimension of about 6.8 mm) while cutting only the second yarn material.

(Third process)
In this example, the pair of jigs were pulled in directions away from each other, and the first yarn material between the two jigs was linear. Here, the tension necessary for drawing out the first yarn material is 300 cN or less per first yarn material, and the stress can be sufficiently tolerated by two SUS304 wires (wire diameter 20 μm) which are conductive yarns. . And the cloth material (rectangular shape) of Example 1 which is the center part of the original fabric, and the waste material which corresponds to the side edge of the original fabric were formed by dividing the original fabric into two at the fragile portion.

[Example 2]
In Example 2, the focus of the CO ₂ laser was set to +60 mm defocus in the second step.
6B, a pair of jigs was set on the original fabric of Example 1, and then a linear fragile portion was created between the two jigs using a CO ₂ laser. At this time, a CO ₂ laser was irradiated from the surface of the original fabric to form a weakened portion (cut line having a width of about 6.8 mm) carbonized in a continuous line shape. At this time, the first yarn material (core yarn) disposed on the back side of the original fabric was not cut. Other conditions were the same as in Example 1.

[Results and discussion]
In Example 1 and Example 2, the first thread material was able to be suitably linear in the side part (sutured portion) of the cloth material. Moreover, the 1st thread | yarn material of the center (normal part) of the cloth material was able to be maintained in the shape of a meander.
For this reason, according to each embodiment, the first thread material is meandered at the normal part (while ensuring suitable durability), and the first thread material is linearized at the stitched part, thereby achieving the stitching property. It was found that it can be improved.

[test]
In this test, the force required for drawing and straightening the first yarn material (one piece) was measured.
Three test pieces obtained by cutting out the cloth material of Example 1 into a predetermined size (130 mm × 17 mm) were used. In each test piece, the separation dimension of each first wire was set to 20 mm. Each test piece (back surface) was backed with an acrylic resin (adhesion amount: 50 g / m ² ).
In this test, the test piece was cut in the direction perpendicular to the tensile direction using a testing machine. An autograph (trade name AG-X, manufactured by Shimadzu Corporation) was used as a testing machine. Then, referring to FIG. 6, the pair of jigs were pulled away from each other, and the force required for the first yarn material to linearize and the stress when the first yarn material began to be applied were measured. . As test conditions, the distance between chucks (the distance between both initial jigs) was set to 30 mm, the tensile speed was set to 30 mm / min, and the stroke length was set to 10 mm. And after testing each of the three test pieces, the strength ratio to break (%) was calculated by the following formula 1.
Calculation formula 1: Strength ratio at break (%) = Minimum tensile force (N) ÷ Strength at break (N) × 100
(Here, the breaking strength is a force necessary for breaking one first thread material. The minimum tensile force is a minimum force necessary for the first thread material to move to a state where it is pulled ( (Minimum force required when shifting from the drawn mode to the pulling mode, which will be described later).

From the above test results, it was found that the breaking strength of the first yarn material (one piece) was 15.5N.
Further, referring to the table of FIG. 7, a change was observed in the slope of the SS curve from the vicinity of the stroke of 8 mm. For this reason, the stroke length of 0 to 8.5 mm is a state in which the SUS line is peeled off from the backing resin and linearized (drawing mode), and the SUS line is pulled from a stroke length of 8.5 mm or more (pulling mode). I found out that Then, referring to the table of FIG. 7, by applying a force of about 3N (≈300 g, minimum pulling force) per first yarn material, the drawn yarn mode is changed to the tension mode, and the first yarn material is moved. It turned out that it can be arranged in a straight line. And from the above-mentioned calculation formula 1, it was found that the strength ratio against breaking was 19.4%.
As a result, according to the configuration of this example, it has been found that the first yarn material can be linearized with a relatively small force (the configuration does not place an excessive burden on the first yarn material). Since the number of first thread materials in the skin piece portion facing the thigh is 23, the total pulling force of these first thread materials is 69 N, and it can be seen that a relatively small force is sufficient. In addition, since the number of the first thread members in the skin piece portion facing the buttocks is 14, the total pulling force of these first thread members is 42N, which indicates that a relatively small force is sufficient.

The cloth material of the present embodiment is not limited to the above-described embodiment, and can take other various embodiments.
(1) In this embodiment, although the manufacturing process of the cloth material was illustrated, it is not the meaning which limits the structure of a manufacturing process. For example, in the first step, the woven fabric provided with the guide points 10a and 10b and the restraint point 10c has been described as an example of the cloth material, but it is not intended to limit the structure (structure structure, etc.) of the cloth material.
Moreover, the example which produces the 1st skin piece 40f and the discard part 44 in the 3rd process was demonstrated. The portion corresponding to the discarding section can be used as it is as the cloth material of the present invention without being discarded.
(2) Moreover, in this embodiment, although the 1st thread material 11 of the covering structure was illustrated, an electrically conductive thread | yarn can also be used as a 1st thread material.

(3) Moreover, in this embodiment, the example (example of functioning as a heater) which attached a pair of connection member 30 to the both ends of the 1st skin piece 40f (cloth material) was demonstrated. In contrast, when the first skin piece functions as an electrode of the capacitive sensor, a connection member (single member) can be attached to one side of the skin piece, for example.
(4) Moreover, in this embodiment, the example which produces the 1st skin piece 40f with a cloth material was demonstrated. A cloth material can be used as other skin pieces, such as a 2nd skin piece other than a 1st skin piece, for example. In addition to the seat cushion skin material, it can also be used for seat back and headrest skin materials.
(5) In the present embodiment, the vehicle seat has been described as an example. However, the configuration of the present embodiment can be applied to vehicle seats and vehicle seats such as airplanes and trains. It can also be applied to vehicle components such as the body, clothing, and the like.

2 Vehicle Seat 4 Seat Cushion 6 Seat Back 8 Headrest 4P Cushion Material 4S Skin Material 10a, 10b Induction Point 11 First Thread Material 12 Second Thread Material 20 Core Thread 21, 22 Conductive Thread 30 Connection Member 40f First Skin Piece ( Cloth material)
40s Second skin piece (other fabric material)
40A Normal part 40B Suture part 42 Fragile part 44 Waste material

Claims (2)

A first thread material that can be energized, a second thread material that is more easily contracted than the first thread material, and a suture part that can be sewn to another cloth material, and a normal part that is different from the suture part In a cloth material formed adjacent to each other,
The first thread material is disposed across the normal part and the stitched part, and the first thread material is arranged in a meandering manner due to a contraction difference with the second thread material in the normal part, A cloth material in which the first thread material is arranged in a straight line at a suture site. A first step of arranging the first thread material in a meandering manner due to a shrinkage difference with the second thread material, while weaving and knitting the first thread material and the second thread material;
When forming a linear fragile portion inferior in strength to the other portion of the original fabric in the original fabric, the fragile portion is applied to the first yarn material while maintaining the energized state of the first yarn material. A second step of forming a cross,
By pulling the original fabric in a direction to break the fragile portion, and pulling out the first thread material while dividing the original fabric in two at the fragile portion, the location of the original fabric adjacent to the fragile portion The method for manufacturing a cloth material according to claim 1, further comprising a third step in which only the first thread material is made linear, and at least one of the two divided raw fabric portions is used as the cloth material.

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