JP2018080417A - Conductive stretch continuous body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conductive stretch continuous body excellent in bending resistance in which insulation properties and ease to take out a terminal are compatible.SOLUTION: Bending resistance, insulation properties, and ease to take out a terminal are improved by constituting a conductive stretch continuous body by inserting in a bending state or arranging in the direction of the length to partially make a knitted structure to a knit fabric structure stretchable to the direction of the length made from a non-conductive yarn and an elastic yarn a conductive naked wire the length of which is 1.2-4.0 times as much as the length of the knit fabric structure.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a conductive cord having elasticity, and more particularly to a conductive stretch continuous body suitable as a conductive wire for a wearable electronic device or a robot.

  In recent years, wearable electronic devices and robots having various movements have appeared, and conductive wires made of metal wires are frequently used for energization and signal transmission of these electronic devices. The development of conductive wires that are durable, flexible, stretchable, and have no sense of incongruity even when worn on clothing due to the fact that metal wires have almost no elongation and are easily broken by repeated bending and pulling action. In such circumstances, various measures have been proposed.

  For example, in Document 1, a fabric for mounting an electronic component in which a plurality of conductive wires made of a covering yarn obtained by winding a metal wire around a core yarn is arranged as a warp yarn has been proposed. Since the metal wire is spirally swirled, the stress generated in the metal wire against the bending deformation of the conductive wire is very small, so it has excellent bending resistance, and it has flexibility from the point of the woven structure. Can be worn on clothes.

  However, since the base material of Document 1 has a woven structure, there is a limit to the elongation of the base material. For example, when used for biological measurements during intense exercise, or for signals of robots that perform complex movements or energization of power supplies, Subject to restrictions. Or there exists a problem that an excessive stress arises in a base material and it fractures | ruptures.

  Regarding the provision of stretchability of the base material, it is fixed by conductive fibers and non-conductive fibers so that the conductive parts are arranged in a regular direction in Document 2 and adjacent conductive fibers do not contact each other. A conductive knitted fabric knitted at a rate of

  Since the conductive knitted fabric technology of Document 2 has a high stretchability because it has a knitted structure, it is not limited by the movement as described above, but a stretchable knitted fabric lacks shape stability. The problem is that there is a danger of short circuit accidents due to contact between conductive fibers.

  Further, in Document 3, a stretchable conductive cloth woven using a conductive wire obtained by covering a metal-plated Woolen yarn with a polyurethane elastic yarn and covering it with a non-conductive stretchability. A current-carrying body having a multi-layer structure with a stretchable non-conductive cloth woven using a yarn is proposed. Insulating effect is also exhibited because the non-conductive cloth is formed on one side or both sides without receiving.

  However, since the conductive wire in the technique of Reference 3 is woven in the intermediate layer, in the operation of taking out the terminal when connecting to an electronic device or a power source, the surface non-conductive cloth layer and the conductive cloth woven structure are used. This requires very troublesome work that must be taken out.

JP 2013-147767 Japanese Utility Model Publication No. 06-059488 No. 3195050

  An object of the present invention is to solve the above-mentioned conventional problems, to provide a continuous conductive stretch body having excellent bending resistance and having both insulation properties and ease of taking out terminals.

  Means employed by the present inventor for solving the above technical problem will be described with reference to the accompanying drawings.

  That is, the conductive stretch continuous body of the present invention has a length of the knitted fabric structure of 1.2 to about the knitted fabric structure having elasticity in the length direction composed of non-conductive yarn and elastic yarn. A bare conductive wire having a length of 4.0 times is inserted in a bent state, or is arranged in the length direction so as to partially form a woven structure.

  Moreover, the said knitted fabric structure comprises tape shape, and the exposed part of a conductive bare wire can be scattered in the length direction on the single side | surface or both surfaces of this tape-shaped knitted fabric structure body.

  The exposed portion of the conductive bare wire can be selectively covered with an insulating film or resin.

  Furthermore, it is possible to use technical means that the knitted fabric structure forms a bag structure, and a conductive bare wire is inserted or knitted into the bag structure.

  Furthermore, in a state where a plurality of the bag tissues into which the conductive bare wires are inserted are arranged in parallel, the respective bag tissues are connected and integrated, and a slit portion is partially provided at a connection portion of these bag tissues, The bag tissue on both sides can be separated and independent.

  Furthermore, the exposed portions of the conductive bare wire can be provided at predetermined intervals in the length direction of the bag tissue into which the conductive bare wire is inserted.

  The conductive stretch continuous body of the present invention is based on a knitted fabric structure having stretchability and flexibility in the length direction, and the length of the knitted fabric structure is 1.2. The conductive bare wire of up to 4.0 times length is inserted in the bent state or arranged in the length direction, so even if it is worn for energizing a large stretchable clothing or a robot with intense movement There is no restriction on the breaking or movement of the conductive wire due to elongation, and it is excellent in bending resistance.

  Further, if exposed portions of the conductive bare wire are provided on the surface of the cord at predetermined intervals in the length direction of the conductive stretch continuous body, connection work to an electronic device or the like can be efficiently advanced.

  Also, if the conductive bare wire is inserted or knitted into a bag structure provided in the length direction of the conductive stretch continuous body, the surroundings are insulated from the non-conductive yarn, so contact between the conductive bare wires, etc. Short circuit accidents due to can be prevented.

  In addition, if the surface of the conductive stretch continuous body is coated with an insulating film or resin, reliable insulating properties and waterproofing effects can be obtained.

It is a front view of the electroconductive stretch continuous body of Embodiment 1 of this invention. It is a front view of the electroconductive stretch continuous body of Embodiment 2 of this invention. It is a front view of the electroconductive stretch continuous body of Embodiment 3 of this invention. It is a cutaway view for demonstrating the example which provides a connection terminal part in the electroconductive stretch continuous body of Embodiment 2 or 3 of this invention. In the conductive stretch continuous body of the present invention, it is a front view showing an application example in which a plurality of conductive bare wire groups are arranged in parallel.

  The mode for carrying out the present invention will be described in more detail with reference to the drawings specifically illustrated as follows.

<Embodiment 1>
[1] Basic configuration of conductive stretch continuous body An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a conductive stretch continuous body 1 according to Embodiment 1 of the present invention. Reference numeral 3 denotes a knitted fabric structure having non-conducting yarns and elastic yarns in the length direction, and reference numeral 2 denotes conductive. A plurality of bare bare wires, in which four bare bare wires 2 are partly organized in the knitted fabric structure 3 in parallel and exposed on the surface of the knitted fabric structure 3 in a bent state. By exposing 2 on the surface of the knitted fabric structure 3 in parallel, the connection surface can be greatly increased in connection to the power source and the operating portion, which is advantageous.

[2] Number of Conductive Bare Wires The number of the conductive bare wires 2 to be juxtaposed to the knitted fabric structure 3 is appropriately selected depending on the amount of current to flow and the width of the knitted fabric structure 3 is parallel. The width is preferably in the range of about 5 to 50 mm, although it varies depending on the number of conductive bare wires 2 to be sewn and whether or not a sewing allowance is required when sewing on clothes.

[3] About the length of the conductive bare wire The conductive bare wire 2 is oriented at any position in the width direction of the knitted fabric structure 3 while repeating ups and downs with respect to the knitted fabric structure 3 in the length direction. The knitted fabric structure 3 has a length 1.2 to 4.0 times longer than the length of the knitted fabric structure 3 and is exposed in a bent state on the front surface or the back surface of the knitted fabric structure 3. As described above, the conductive bare wire 2 is present at a length of 1.2 times or more with respect to the length of the knitted fabric structure 3, so that even if the knitted fabric structure 3 is stretched and stretched, the conductive bare wire 2 Since there is a margin in length, no tensile stress is exerted on the conductive bare wire 2 and there is no possibility of cutting. More preferably, the length of the conductive bare wire 2 is 1.5 times or more the length of the knitted fabric structure 3.

[4] Material for Conductive Bare Wire The conductive stretch continuous body 1 is knitted and woven in an extended state, and when it is removed from the weaving machine, it is shrunk by the restoring force of the elastic yarn, but the conductive bare wire 2 having high bending rigidity is used. The material of the conductive bare wire 2 is, for example, sputtered, vapor-deposited and plated on the surface of a processed yarn obtained by crimping a flexible synthetic fiber. It is preferable that a metal film of silver, copper, nickel, copper sulfide, etc. is formed by, or the like, or a metal wire such as copper, stainless steel, nickel, aluminum or the like coated with a metal coated wire around an elastic fiber. It can also be used.

[5] About the exposed portion of the conductive bare wire The advantage that the exposed portion of the conductive bare wire 2 is scattered in the length direction on one side or both sides of the knitted fabric structure 3 can be used as a contact point. If the pitch between the exposed parts is at least 0.5 mm or more, the contact can be freely selected, and if the length of the exposed part is 1 mm or more, the contact can be freely selected. A length of 2 to 50 mm is preferred.

[6] Regarding the yarn material and structure of the knitted fabric structure The non-conductive yarn constituting the knitted fabric structure 3 has a fineness that is generally used for warp knitting and fabrics such as synthetic fibers and natural fibers. A fiber yarn of about 30 to 500 Dtex can be employed, and among them, a yarn obtained by crimping a synthetic fiber is preferable because flexibility and stretchability are imparted.

  Further, in order to impart stretchability to the knitted fabric structure 3, an elastic yarn is used for a part or the whole of the warp yarn, and knitting and weaving while giving a predetermined elongation ratio to the elastic yarn, after the machine is overwhelmed. Since the knitted fabric structure 3 is contracted by the elastic recovery force, the knitted fabric structure 3 can be extended at least by the contracted amount.

  Examples of the elastic yarn used in the knitted fabric structure 3 include polyurethane type elastic yarn, polyolefin type elastic yarn, polyester type elastic yarn, polyamide type elastic yarn, silicone elastic yarn and natural rubber type elastic yarn. The elastic yarn is preferable because it can effectively exert the stretchability by orienting linearly in the length direction of the cord.

  In addition, in order to obtain sufficient stretchability in the knitted fabric structure 3, it is necessary to allow the knitted fabric structure 3 itself to have a margin for contraction by the restoring force of the elastic yarn during knitting and weaving. It is preferable to knit and weave with a coarse density with a fine yarn.

[7] Thermal Bonding of Elastic Yarn On the other hand, the conductive stretch continuous body 1 has a problem of easily causing a slip-in phenomenon in which the elastic yarn enters inside when cut to a predetermined length. It is preferable to suppress the slip-in phenomenon by thermally bonding to other yarns using a soft elastic yarn.

[8] Covering the exposed portion of the bare conductive wire When the exposed portion of the bare bare wire 2 is scattered on the surface of the conductive stretch continuous body 1 as in this embodiment, a short circuit may be caused by the method of use. Since there is a concern that it may occur, the exposed portion of the conductive bare wire 2 can be selectively covered with an insulating film or resin as needed (not shown). In that case, it is preferable to coat with a flexible polyurethane resin or silicone resin because the stretchability is maintained.

  For covering the exposed portion of the conductive bare wire 2, a method of covering the entire conductive stretch continuous body 1 with a resin or a method of selectively covering only the exposed portion of the conductive bare wire 2 is adopted. In particular, if the whole is covered, a waterproof effect can be obtained, which is suitable for wearing on clothes.

<Embodiment 2>
[9] About a knitted fabric structure having a bag structure FIG. 2 is a warp knitting or forming a bag structure in which both ends of a double structure composed of a back structure 4 and a surface structure 5 are joined by a woven structure, Embodiment 2 of the present invention in which a conductive bare wire 2 is inserted or knitted is shown, and the bag structure is composed of non-conductive yarn and elastic yarn as in Embodiment 1, and has stretchability in the length direction. The conductive bare wire 2 exists in a bent state in the bag tissue.

  By adopting the bag structure structure as in the second embodiment, the conductive bare wire 2 is wrapped by the back structure 4 and the front structure 5 of the bag structure made of non-conductive yarn, so that it does not need to be insulated and used as it is. Moreover, since the length of the conductive bare wire 2 exists in a state longer than the length of the structure formed by the bag tissue, the end of the conductive bare wire 2 can be easily removed from the cut end of the conductive stretch continuous body 1. If the conductive bare wire 2 inserted into the bag tissue is easily pulled out, a portion of the conductive bare wire 2 can be stabilized in the bag tissue. I can do it.

  Moreover, if the conductive bare wire 2 is a conductive bare wire 2 in which a metal film is formed on the surface of a crimped synthetic fiber, the conductive bare wire 2 is rich in flexibility and is bent finely in units of each fiber in the bag tissue. Therefore, it does not protrude from the bag tissue, and can exhibit high durability against repeated bending of the conductive stretch continuous body 1.

  A plurality of bag tissues can be provided in one conductive stretch continuous body 1 of Embodiment 2 of the present invention, and the conductive bare wire 2 can be inserted or knitted into each bag structure. Alternatively, a single-tissue portion can be provided on one side and used as a sewing allowance when sewing to clothes or the like.

<Embodiment 3>
[10] Transverse insertion of conductive bare wire into bag structure FIG. 3 shows a third embodiment of the present invention. A bag structure having a slight width is provided by warp knitting, and a back side portion 4 and a front side portion 5 of the bag structure are provided. Even if the conductive bare wire 2 is a tape-like conductive stretch continuous body 1 in which the conductive bare wire 2 is inserted in a zigzag manner, and the conductive bare wire is zigzag oriented, it can be a highly rigid metal wire or metal fiber. The stretchability of the conductive stretch continuous body 1 is not hindered, and the durability of the conductive bare wire 2 itself can be obtained.

  When there is a concern that the zigzag orientation of the conductive bare wire 2 may be disturbed by the repeated stretching action of the conductive stretch continuous body 1, a conductive yarn may be provided between the back side portion 3 and the front side portion 4 or the like. 2 can be partially fixed.

<Other embodiments>
[11] Formation of exposed portion of conductive bare wire to bag tissue FIG. 4 shows the conductive stretch continuous body 1 (embodiment 2 or embodiment 3) having a bag tissue cut in the length direction and viewed from the inside. A cut surface is shown, and the conductive bare wire 2 is formed of a conductive stretch continuous body 1 with respect to the energized portion covered over a predetermined length by the front side portion 5 and the back side portion 4 of the bag tissue. An exposed portion 6 of the conductive bare wire 2 in which the conductive bare wire 2 is exposed on the surface can be provided in a necessary place, and the conductive bare wire exposed portion 6 can be used as a connection terminal portion of an electronic device or a power source. . This also eliminates the troublesome work of unpacking the bag structure and taking out the conductive bare wire 2 to form the connection terminal portion.

[12] Regarding a knitted fabric structure in which a plurality of bag structures are parallel. FIG. 5 also shows two knitted fabric structures parallel to the length direction of the knitted fabric structure 3, and further includes a conductive bare wire 2 in each bag structure. The electroconductive stretch continuous body 1 comprised by inserting or knitting is shown. Further, in the present embodiment, a plurality of bag tissues are connected and integrated, and a slit portion is partially provided at a connection portion of these bag tissues so that the bag tissues on both sides of the slit portion are separated and independent. As a result, it is possible to provide the separation portion 7 in which two bag tissues are separated at a predetermined interval. Therefore, if each bag structure is cut, a connection terminal in which the two conductive bare wires 2 are separated can be easily obtained. I can do it. In this case, if the two bag tissues are identified using different colored yarns, the wiring can be connected without making a mistake, which is a preferable mode.

A stretch continuous body is produced under the method of Embodiment 2 and the weaving conditions shown in Table 1 below, and using a demacher tensile tester, the stretch stroke is 40 mm, the stretch rate is 130%, and the stretch and stretch are repeated 1 million times. The electrical resistance change rate was measured every 250,000 times. As a result, as shown in Table 2, the electrical resistance value increased by 35% at the time of contraction and 25% at the time of extension at 1 million times, but at a level where there is no practical problem because the conductive bare wire is not cut. there were. Further, the conductive stretch continuous body was bent with a bending tester with a bending angle of ± 90 °, a bending speed of 1.5 times / second and a jig diameter of 10 mm. The test results with a jig width of 3 mm, a sample length of 200 mm, and a load of 45 g are as shown in Table 5. The electrical resistance value after bending 1,000,000 times increased by 23%, but the conductivity was not lost. It had sufficient durability. Further, the length of the conductive bare wire 2 was 2.80 times the length of the woven fabric, which was sufficient for the maximum stretching of the woven fabric with an elongation rate of 170%.

A stretch continuous body of the present invention was produced under the method of Embodiment 1 described above and the weaving conditions shown in Table 3 below, and the bending test was performed under the same conditions except that only the load was changed to 25 g with respect to the test conditions of Example 1. A test was conducted. As a result, as shown in Table 5, the electrical resistance value after bending 1,000,000 times was increased by 12%, but the conductive performance was not lost as in Example 1, and it was at a level that was not problematic in practice. . Further, the length of the conductive bare wire was 2.99 times the length of the woven fabric, which was sufficient for the maximum stretching of the woven fabric with a stretch rate of 70%.

The stretch continuous body of the present invention was produced using the method of Embodiment 3 and the warp knitting conditions shown in Table 4 below, and the bending test was changed to a sample length of 250 mm and a load of 25 g with respect to the test conditions of Example 1. did. The other conditions were tested under the same conditions as in Example 1. As a result, as shown in Table 5, the electrical resistance value after bending 1,000,000 times increased by 72% and the resistance change was large compared to Examples 1 and 2, but there was no problem without losing the conductive performance. It was a level. The length of the conductive bare wire was 2.01 times the length of the woven fabric, and had a length sufficient for the maximum stretch of the warp knitted fabric with a stretch rate of 65%.

The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the claims, for example,
Techniques such as providing a color pattern for the purpose of obtaining design in the woven structure part of the conductive stretch continuous body 1 are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Conductive stretch continuous body of this invention 2 Conductive bare wire 3 Knitted fabric structure 4 Back side part of bag structure 5 Front side part of bag structure 6 Conductive bare wire exposed part 7 Separation part

Claims (7)

  Conductive bare wire having a length 1.2 to 4.0 times the length of the knitted fabric structure is bent with respect to the knitted fabric structure made of non-conductive yarn and elastic yarn. A conductive stretch continuous body, characterized in that it is inserted in a state or partially formed in a woven structure and arranged in the length direction.   2. The knitted fabric structure has a tape shape, and exposed portions of conductive bare wires are scattered in the length direction on one side or both sides of the tape-shaped knitted fabric structure. The electrically conductive stretch continuous body as described.   3. The conductive stretch continuous body according to claim 2, wherein an exposed portion of the conductive bare wire is covered with an insulating film or resin.   The conductive stretch continuous body according to claim 1, wherein the knitted fabric structure forms a bag structure, and a conductive bare wire is inserted or knitted into the bag structure.   In a state where a plurality of the bag tissues into which the conductive bare wires are inserted are arranged in parallel, the respective bag tissues are connected and integrated, and a slit portion is partially provided at a connection portion of these bag tissues, and the slit portion The conductive stretch continuous body according to claim 4, wherein the bag tissues on both sides are separated and independent.   6. The conductive stretch continuous body according to claim 4 or 5, wherein exposed portions of the conductive bare wire are provided at predetermined intervals in a length direction of the bag tissue into which the conductive bare wire is inserted. .   The conductive stretch continuous body according to any one of claims 1 to 6, wherein the bare bare wire generates heat when energized.