JP2014229568A - Belt-like transmission line having flexibility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission fabric that is thin and can be bent softly, is not bulky even when increasing the kinds of signals to be transmitted, and does not break even when expanded and contracted.SOLUTION: This invention provides a belt-like transmission line wherein a conductor line covered by an insulator is arranged in a zigzag pattern on a flexible fabric having elastic yarns.

Description

  The present invention relates to a cloth in which a transmission line is wired for a cloth product equipped with an electronic device or the like.

  In recent years, a stretchable electric wire, a signal transmission cable, and an optical signal transmission cable in which a transmission line such as a copper wire or an optical fiber is disposed or wound around a stretchable core material and an outer layer is covered with an insulator such as a fiber. Suggests industrial applicability to the robot field, body-worn device wiring, clothes-worn device wiring, articulated robots, and the like (see, for example, Patent Documents 1 to 5 below). A biological signal measuring device and a fabric that have been used have been proposed (see, for example, Patent Documents 6 and 7 below).

However, when it is desired to transmit more signals, it is necessary to fabricate several stretchable transmission lines by arranging them severally, or fabricating a multi-core transmission line. Entanglement becomes a problem, and the increase in the number of cores has a problem in that the number of conductor wires on the concentric circumference is limited and the stretchability is lowered, and these problems need to be improved.
On the other hand, there is also a proposal of a fabric using a composite yarn in which an elastic fiber is used as a core and a metal wire is spirally wound around the core, but it has stretchability but lacks transmission properties for transmitting various signals ( For example, see Patent Document 8 below).

JP 2002-313145 A Japanese Patent No. 4055777 International Publication No. 2008/078780 Pamphlet International Publication No. 2009/157070 Pamphlet International Publication No. 2010/074259 Pamphlet JP 2010-142413 A JP 2012-177210 A JP-A-61-194251

  An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a transmission fabric that is thin and flexible and that is not bulky even when various signals are transmitted and that does not break even when stretched.

As a result of intensive investigations in view of the above problems, the present inventors have identified the above-mentioned problems by specifying the material configuration of the fabric and how to arrange the conductor wires, and further specifying the stretch rate and the bending resistance of the fabric. It has been found that it can be solved, and has reached the present invention.
That is, the present invention is as follows.

(1) A band-shaped transmission line characterized in that a conductor wire covered with an insulator is arranged in a zigzag shape on a stretchable fabric having elastic yarns.
(2) The band-shaped transmission line according to claim 1, wherein a conductor wire is inserted into the stretchable fabric.
(3) The belt-like transmission line according to claim 1 or 2, wherein the expansion / contraction ratio in the direction of arranging the conductor wire is 5% to 100%, and the bending resistance is 5000 mN / 25 mm or less.
(4) The value of X represented by the following formula (1) represented by the zigzag swing width A (number of wells) and the repeat length B (number of repeat courses) of the conductor wire is 3.0 to 20.0. And (1) to (3) above, wherein, within the number of stitches C expressed by the following equation (2), the number of all constrained portions where the conductor wire is constrained by the sinker loop is 20 or less. The strip-shaped transmission line as described in any one of.
X = 2√ {A ² + (B ÷ 2) ² } (1)
C = A × B (2)
(5) The band-shaped transmission line according to any one of (1) to (4) above, wherein the thickness is 0.5 mm to 3.0 mm.
(6) The above 1 characterized by slitting for each predetermined number of conductor lines, or knitting with a predetermined number of conductor lines for each number of conductor lines determined in advance by the thread and the conductor line arrangement of the scissors guide The strip | belt-shaped transmission line as described in any one of -5.

The stretchable belt-like transmission line of the present invention can arrange conductor wires in an arbitrary number on a plane, so that it does not break even when the signals to be transmitted are expanded and contracted, and is thin and soft.
In addition, slitting into a belt shape is easy, and several pieces can be manufactured at a time when considering the ridge arrangement at the time of knitting, leading to cost reduction for mass production.

It is a figure which shows an example of the arrangement structure of the conductor wire distribute | arranged in the strip | belt-shaped transmission line of this invention.

Hereinafter, the present invention will be specifically described.
In the present invention, the stretchable belt-like transmission line is a belt-like fabric formed by arranging conductor wires covered with an insulator on a stretchable fabric having elastic yarns in a zigzag shape. These band-like transmission lines having elasticity are used for transmitting electric power, electrical signals, optical signals, etc., but electronic devices such as detection devices, signal generation devices, and sensors may be arranged on the fabric. The fabric may be configured as a portion that connects these electronic devices and the like that are in a remote location.

  The belt-like transmission line having stretchability according to the present invention has different standards depending on the type of fabric product used as an end use, but the stretch rate in the direction in which the conductor wire is arranged (called the vertical direction) is 5% to 100%. It is preferable. The stretch ratio in the vertical direction is more preferably 10% to 90%, and particularly preferably 15% to 80%. If the expansion / contraction rate is less than 5%, no elongation is felt, and if it exceeds 100%, the stretch recovery property is deteriorated. The expansion / contraction rate mentioned here is the maximum expansion / contraction rate that can maintain an expansion / contraction recovery rate of 50% or more. In addition, the expansion / contraction rate and the expansion / contraction recovery rate are obtained by the measurement method in the examples described later.

  Furthermore, the elastic band-like transmission line of the present invention preferably has a bending resistance of 5000 mN / 25 mm or less. More preferably, it is 3000 mN / 25 mm or less, Most preferably, it is 2000 mN / 25 mm or less. When the bending resistance exceeds 5000 mN / 25 mm, the bending rebound becomes strong and feels hard. The smaller the bending resistance, the better. However, it is difficult to make it 10 mN / 25 mm or less in relation to other characteristics.

FIG. 1 is a diagram showing an example of the arrangement structure of conductor wires arranged in the band-shaped transmission line of the present invention. In the figure, D is a conductor wire, A is a zigzag swing width (number of wells) of the conductor wire, and B is a zigzag repeat length (number of repeat courses). In order to make the expansion ratio and the bending resistance of the belt-shaped transmission line having elasticity according to the present invention within the above-mentioned range, the zigzag swing width A (the number of wells) and the repetition length B (the number of repeat courses) of the conductor wire It is preferable to select a knitted structure in which the value of X represented by the following formula (1) represented by the formula is 3.0 to 20.0, more preferably 3.5 to 15.0, and particularly preferably 4. 0-12.5.
X = 2√ {A ² + (B ÷ 2) ² } (1)

Furthermore, within the number of stitches C expressed by the following formula (2), it is preferable that all the constrained portions where the conductor wire is constrained by the sinker loop is 20 or less, more preferably 15 or less, and particularly preferably 10 It is as follows.
C = A × B (2)
That is, the elasticity and bending softness can be ensured by reducing the restriction of the conductor wire by the sinker loop. If the amount is too small, a part of the conductor wire may be lifted and cause a broken wire, so 4 or more is preferable, and 6 or more is more preferable.

  The thickness of the stretchable belt-like transmission line of the present invention is preferably 0.5 mm to 3.0 mm. More preferably, it is 0.5 mm-2.5 mm, Most preferably, it is 0.5 mm-2.0 mm. If the thickness is less than 0.5, the band-shaped transmission line is easily broken, and if it exceeds 3.0 mm, it is easy to be bulky or bend and hard. In order to control the thickness within the above range, the diameter of the conductor wire to be disposed is preferably 2.75 mm or less, more preferably 2.0 mm or less, more preferably 1.5 mm or less. From the viewpoint of bending softness, the diameter of the conductor wire is particularly preferably 1.2 mm or less, and most preferably 1.0 mm or less.

  The conductor wire used in the belt-like transmission line having stretchability according to the present invention is preferably one in which an assembly resin of one or more conductor thin wires is coated with an insulating resin, and the single wire diameter of the conductor thin wires is the same as that of the production of the telescopic wires. In consideration of the workability of the wire and the handleability during the production of the electric wire fabric, the thickness is preferably 0.01 mm to 1.00 mm, more preferably 0.01 mm to 0.08 mm, and most preferably 0.01 mm to 0.05 mm. The type of conductor and the type of insulator are not limited at all.

  In the stretchable belt-like transmission line of the present invention, the way of arranging the conductor wire is not particularly limited. For example, a method such as sewing by handcraft or partial fastening with an adhesive may be used. It is preferable to insert and arrange the conductor wires in a zigzag shape during knitting or weaving. When the belt-like transmission line of the present invention is knitted by a knitting machine, it is not limited to a warp knitting machine, a flat knitting machine, a circular knitting machine, a cylindrical knitting machine or the like, but is preferably knitted by a warp knitting machine. . The warp knitting machine is preferably a single raschel knitting machine of 10 GG to 120 GG, more preferably 12 GG to 80 GG, and most preferably 14 GG to 72 GG. The on-machine width is not particularly limited, and is preferably wider. Further, a wide cloth may be slit for each of a plurality of conductor wires so that the number of signals to be transmitted becomes a predetermined number, leading to mass production. Furthermore, when a thread or a conductor wire is passed through a cocoon guide, if the guides are knitted by repeatedly arranging the conductor wires so that there is a gap between the conductor wires, an arbitrary belt-like transmission line can be formed without a slit. Since several hundreds can be made simultaneously, efficiency is high.

  The fibers constituting the ground texture of the stretchable belt-like transmission line of the present invention include polyurethane elastic fibers, polyolefin elastic fibers, natural rubber, and synthetic rubber elastic fibers for imparting stretchability to at least a part thereof. An elastic fiber selected from the above is used. Fibers other than elastic fibers may be mixed, and the mixed fibers are not particularly limited and can be arbitrarily selected from known fibers. For example, polyethylene terephthalate fiber, polytrimethylene terephthalate fiber, polybutylene terephthalate fiber, polyester elastomer fiber, polyamide fiber, polyacryl fiber, polypropylene fiber and other natural fibers such as cotton, hemp and wool, cupra Arbitrary fibers, such as regenerated fibers, such as rayon, viscose rayon, and lyocell, are mentioned. The proportion of the elastic fiber used is preferably 5% to 60%, more preferably 10% to 55%, and particularly preferably 15% to 50%. Moreover, it is preferable that the mixture ratio of the elastic fibers contained in the entire belt-shaped transmission line is 0.5% to 30.0%, more preferably 2.5% to 20.0%, and particularly preferably 5.0%. ~ 10.0%.

  The cross-sectional shape of the fiber may be round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped, Yaba-shaped, flat-shaped, dog-bone-shaped, etc., multi-leafed, hollow, or irregular Good. The form of the fiber may be any of unprocessed yarn, spun yarn, twisted yarn, false twisted yarn, fluid injection processed yarn and the like. Moreover, in fibers, such as a multifilament, the thing of thickness of 10-2000 dtex can be used normally, and a single yarn fineness can be set arbitrarily.

Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited thereto. In addition, each measurement and characteristic evaluation in an example were performed by the following method.
(1) Measurement of stretch rate and stretch recovery rate 100 mm (length) x 25 mm (width) strip-shaped test pieces were prepared as strip-shaped transmission lines (100 mm length x width that can be collected if the width is less than 25 mm) Test piece). The test piece at this time has a length direction in which the conductor wire is arranged (vertical direction). A test line with a grip width of 20 mm and a grip width of 20 mm is drawn on each test piece. Next, using a Tensilon universal testing machine (manufactured by A & D Co., Ltd.), a one-cycle test (return to the original state after a predetermined extension) is performed under the conditions of a grip width of 20 mm, a grip interval of 50 mm, and a tensile speed of 100 mm / min. . At this time, the length at which the return stress becomes zero is measured. The predetermined expansion / contraction rate of the one-cycle test can be arbitrarily set within a range of 5% to 100% of the gripping interval, and is repeatedly measured in 5% increments until the maximum expansion / contraction rate at which the expansion / contraction recovery rate is less than 50%. The expansion / contraction ratio is the maximum expansion / contraction ratio that can maintain the expansion / contraction recovery ratio of each sample at 50% or more. However, in one cycle test, one test piece is measured once, and the test piece is replaced every time.
In addition, the expansion / contraction recovery rate was calculated | required by following Formula. At this time, the holding interval (initial sample length) is L ₀ , the extension length at a predetermined expansion rate (L ₀ + L ₀ × predetermined expansion rate / 100) is L ₁ , and the holding interval at zero return stress is L ₂ . .
Expansion / contraction recovery rate (%) = {(L ₁ −L ₂ ) / (L ₁ −L ₀ )} × 100

(2) Measurement of bending resistance A test piece having a strip shape of 89 mm (length) × 25 mm (width) (a test piece having a width of less than 25 mm, 89 mm length × a width that can be collected) is prepared. At this time, five test pieces are prepared with the length direction as the direction in which the conductor wires are arranged (vertical direction).
Based on JIS standard L-1096 bending repulsion A method, it measures using a Gurley type flexibility testing machine (NO.311 by Yasuda Seiki Seisakusyo Co., Ltd.).
Incidentally, stiffness B _r is calculated based on the following calculation formula JIS standard L-1096.
B _r = RG × (aW _a + bW _b + cW _c ) × (L−12.7) ² /d×3.375×10 ⁻⁵
In the above formula,
RG: Gurley scale a, b, c: Weight distance from the rotation axis (a = 25.5 mm, b = 50.8 mm, c = 101.6 mm)
W _a, W _b, W _c : Load weight L: Sample length (sample length is 89 mm as standard, but the length can be changed in 12.5 mm increments, and a minimum measurement of 25 mm is possible)
d: Sample width (25 mm or evaluation width)

(3) Measurement of thickness Based on JIS standard L-1018, it measures using constant pressure thickness measuring device FFG-11.
(4) Measurement of the number of sinker loops of the ground structure restraining the conductor wire Using a microscope or a microscope, the number of sinker loops applied to the conductor wire from the sinker loop side (back side) of the obtained band-shaped transmission line is counted.

(5) Confirmation of presence or absence of disconnection 2% expansion / contraction is evaluated based on the measurement of the expansion / contraction rate and expansion / contraction recovery rate of (1) above. Before the tensile test, the electrical resistance value R1 of the conductor wire arranged in advance is measured. At this time, it is advisable to make a mark so that the measurement conductor can be seen. The electrical resistance value R2 of the conductor wire (marked part) after the 2% expansion / contraction 1 cycle test is measured.
In addition, the judgment of the presence or absence of a disconnection is considered to be disconnection when the value of [(R2-R1) / R1] × 100% is 10% or more.

(6) Evaluation of zigzag property Using a punching machine (hydraulic cutting machine: 10C-18B manufactured by Iino Co., Ltd.), the fabric is cut with a blade shape (100 mm x 100 mm x height 2.5 cm). Next, one conductor wire is taken out from the punched fabric. At this time, if the space between the conductor wires is cut with scissors, one can be easily taken. Next, two rulers (metal rule 30 cm) are prepared, and the conductor wires are straightened so that the conductor wires are sandwiched between the rulers. At this time, the punching length in the conductor wire length direction is set to K0, the length in the straight line state is set to K1, and the zigzag coefficient G is obtained by the following equation. K0 is the punched blade die length (100 mm), and the sample to be evaluated may be of a length that can be cut if it is less than 100 mm.
G = K1 / K0
When the zigzag coefficient G is less than 1.02, it is determined that there is no zigzag, and when it is 1.02 or more, it is determined that there is zigzag.

[Example 1]
A warp knitted fabric was manufactured under the following conditions to obtain a belt-like transmission line. Table 1 shows various physical properties and evaluation results of the obtained band-shaped transmission line.
<Warning machine> Russell machine RSE4N3K manufactured by KARL MAYER, 130 inches wide, 48GG
<Thread use> Front: Non-elastic yarn, Nylon 6 110dt / 24f x 2 lines
Middle: elastic yarn, spandex 310dt / 36f
Back: Conductor wire, USTC wire (element diameter 0.03mmφ, 114 wires)
<Insertion arrangement in the heel guide> Front and middle full set, back 1 in 1 out <knitting> Front: 42/24/20/24/42/46 //
Middle: 22/00 //
Back: 22/00/66/44/66/00 //
<Yarn feed amount> Front: 2130 mm / rack
Middle: 135mm / rack (1.8mm diameter draft)
Back: 740mm / rack <Number of on-board courses> 26 courses / inch

[Example 2]
A warp knitted fabric was produced in the same manner as in Example 1 except that the back knitted structure was changed to 44/00 //, and the back yarn feed amount: 1390 mm / rack to obtain a belt-like transmission line. Table 1 shows various physical properties and evaluation results of the obtained band-shaped transmission line.

[Example 3]
Back knitting structure: 14 14/12 12/10 10/8 8/6 6/4 4/2 2/0 0/2 2/4 4/6 6/8 8/10 10/12 12 //, back feeding A warp knitted fabric was produced in the same manner as in Example 1 except that the yarn amount was changed to 730 mm / rack, and the back wrinkling arrangement was changed to 1 in 6 out, and a belt-like transmission line was obtained. Table 1 shows various physical properties and evaluation results of the obtained band-shaped transmission line.

[Example 4]
Front yarn use: FTY (spandex 44 dt / 4f x nylon 656 dt / 48f), front yarn feed amount: 2220 mm / rack, except that the warp knitted fabric was manufactured in the same manner as in Example 1 to obtain a belt-like transmission line It was. Table 1 shows various physical properties and evaluation results of the obtained band-shaped transmission line.

[Example 5]
A warp knitted fabric was manufactured under the following conditions to obtain a belt-like transmission line. Table 1 shows various physical properties and evaluation results of the obtained band-shaped transmission line.
<War knitting machine> Russell machine RSE4N3K manufactured by KARL MAYER, 130 inches wide, 28GG
<Thread use> Front: Non-elastic yarn (Nylon 6 110dt / 24f x 2 lines)
Middle: Elastic yarn (spandex 620dt / 72f)
Back: Conductor wire (USTC wire (element diameter 0.03mmφ, 300 wires))
<Insertion arrangement in bag guide> Full set of front, middle and back <Knitting> Front: 42/24/20/24/42/46 //
Middle: 22/00 //
Back: 22/00/00/00/00/00/22/22/22/22 //
<Yarn feed amount> Front: 4200mm / rack
Middle: 270mm / rack (1.8mm diameter draft)
Back: 950 mm / rack <Number of on-board courses> 13 courses / inch

[Example 6]
Back knitted structure: 10 10/0 0 //, back yarn feed amount: 2750 mm / rack, back knitting arrangement: warp knitted fabric was manufactured in the same manner as in Example 1 except that it was changed to all-in, and a belt-like transmission line Got. Table 1 shows various physical properties and evaluation results of the obtained band-shaped transmission line.

[Example 7]
Back knitting structure: 22/00/44/22/66/44/88/66/10 10/88/12 12/10 10/14 14/12 12/14 14/10 10/12 12/88/10 10 / 66/88/44/66/22/44/00 //, back yarn feed amount: 710 mm / Rack knitted fabric was manufactured in the same manner as in Example 1 except that it was changed to a rack, and a belt-like transmission line was obtained. Table 1 shows various physical properties and evaluation results of the obtained band-shaped transmission line.

[Example 8]
A warp knitted fabric was manufactured under the following conditions to obtain a belt-like transmission line. Table 1 shows various physical properties and evaluation results of the obtained band-shaped transmission line.
<War knitting machine> Russell machine RSE4N3K manufactured by KARL MAYER, 130 inches wide, 20GG
<Thread use> Front: Non-elastic yarn (Nylon 6 110dt / 24f x 2 lines)
Middle: Elastic yarn (spandex 620dt / 72f)
Back: Conductor wire (USTC wire (element diameter 0.08mmφ, 110 wires))
<Insertion arrangement in bag guide> Full set of front, middle and back <Knitting> Front: 42/24/20/24/42/46 //
Middle: 22/00 //
Back: 66/44/22/00/22/44 //
<Yarn feed amount> Front: 5520 mm / rack
Middle: 420mm / rack (1.8mm diameter draft)
Back: 1290mm / rack <Number of on-board courses> 10 courses / inch

[Comparative Example 1]
A warp knitted fabric was produced in the same manner as in Example 1 except that the back knitted structure was changed to 22/00 //, and the back yarn feed amount: 510 mm / rack to obtain a belt-like transmission line. Table 1 shows various physical properties and evaluation results of the obtained band-shaped transmission line.

[Comparative Example 2]
Back knitted fabric: 22/00 //, back yarn feed amount: 1240 mm / rack except that the warp knitted fabric was manufactured in the same manner as in Example 8 to obtain a belt-shaped transmission line. Table 1 shows various physical properties and evaluation results of the obtained band-shaped transmission line.

[Comparative Example 3]
The middle is aligned with 110 dt / 24f x 2 inelastic yarn nylon 6, the middle knitting structure is changed to 20/02 //, the middle yarn feed amount is changed to 1900 mm / rack, and the arrangement of the front and middle into the heel guide is changed. It was produced in the same manner as in Example 1 except that a 132-inch long conductor wire (USTC wire: strand diameter 0.03 mmφ, 114 wires) was inserted into the entire course in all courses. Table 1 shows various physical properties when the knitted fabric is used in the horizontal direction (the insertion direction of the conductor wire is vertical).

  The belt-like transmission line of the present invention can be used for a cloth-made product with wiring in which the base fabric repeatedly undergoes expansion and contraction. For example, it can be attached to various clothes, supporters, belts, tapes, bandages, chairs, car seats, beds, curtains, carpets, wallpaper, etc., and made into a cloth product with wiring.

A Zigzag swing width (number of wells) of conductor wire
B Repeating length of zigzag conductor wire (number of repeat courses)
D Conductor wire

Claims (6)

  A belt-like transmission line comprising a stretchable fabric having an elastic yarn and a conductor wire covered with an insulator arranged in a zigzag shape.   The band-shaped transmission line according to claim 1, wherein a conductor wire is inserted into an elastic fabric.   The belt-like transmission line according to claim 1 or 2, wherein a stretch rate in a direction in which the conductor wire is arranged is 5% to 100%, and a bending resistance is 5000 mN / 25 mm or less. The value of X represented by the following formula (1) represented by the zigzag-shaped swing width A (number of wells) and repetition length B (number of repeat courses) of the conductor wire is 3.0 to 20.0, and The number of all restraints where the conductor wire is restrained by the sinker loop is 20 or less within the number of stitches C expressed by the following equation (2). The belt-shaped transmission line described.
X = 2√ {A ² + (B ÷ 2) ² } (1)
C = A × B (2)   The band-shaped transmission line according to any one of claims 1 to 4, wherein the thickness is 0.5 mm to 3.0 mm.   6. A slit is formed for each predetermined number of conductor wires, or knitting is performed with a predetermined number of conductor wires determined according to a predetermined number of conductor wires in the thread guide and conductor wire arrangement. The strip-shaped transmission line as described in any one of.

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