JP6345521B2 - Terminal-processed elastic transmitter - Google Patents

Description

  The present invention relates to a stretchable transmission body that is terminal-processed so as not to lose stretchability. More specifically, the present invention relates to a stretchable transmission body with little deterioration with time of stretchability, in which a transmission line is spirally wound around a stretchable core material, and an outer coating layer is provided on the outside as necessary.

A lot of stretchable transmitters have been studied. Patent documents include a stretchable electric wire and a manufacturing method thereof (see Patent Literature 1 below), a stretchable signal transmission cable (see Patent Literature 2 below), and a stretchable optical signal transmission cable (Patent Literature below). Document 3) is known. An elastic wire harness (see Patent Document 4 below) using an elastic wire is also known.
In recent years, as the elastic transmission body is widely used, there is an increasing need to handle the elastic transmission body as it is. However, there is a problem that the stretchability is lost when the stretchable transmission body is processed in the same manner as a normal cable. That is, there is a demand for a stretchable transmitter that has been terminal-processed so as not to lose stretchability.

The stretchable transmission body includes a stretchable core material and a transmission line, and most of them are wound around the core material in a spiral shape. The reason why the stretchability of this stretchable transmission body is lost is that the core material shrinks when the terminal is processed and retracts into the stretchable transmission body, or the core material becomes stretchable by repeatedly stretching during use. It is because it will be retracted into the inside.
In order to avoid this, Patent Document 4 discloses that the core member is joined to a housing provided at an end of the stretchable transmission body. However, there is no disclosure or suggestion about a method of using the stretchable transmitter alone.

International Publication No. 2008/078780 Pamphlet International Publication No. 2009/157070 Pamphlet International Publication No. 2010/074259 Pamphlet JP 2010-073557 A

  An object of the present invention is to provide a stretchable transmission body in which a transmission line is spirally wound around a stretchable core material, and an outer covering layer is provided on the outer side as necessary. It is to provide an elastic transmission body with little deterioration with time.

As a result of intensive studies so that the stretchability of the stretchable transmission body is not lost, the present inventors have found that the core material is retracted into the stretchable transmission body, causing a reduction in stretchability. The outer diameter of the end is made larger than the wound inner diameter of the transmission wire wound spirally, or the end of the core is joined to the end of the transmission line or the end of the outer coating layer, It has been found that the core material is not drawn into the interior and the stretchability is not lost even if it is expanded or contracted by using any of these methods in combination, and the present invention has been achieved.
That is, the present invention provides the following inventions.

(1) An elastic transmission body having a structure in which a transmission line is spirally wound around an elastic core material, and an end portion of the core material is joined to an end portion of the transmission line. An elastic transmission body characterized by
(2) A stretchable transmission body having a structure in which a transmission line is spirally wound around a stretchable core material and an outer coating layer is provided on the outside thereof, and any one of the following structures: The elastic transmission body characterized by having the above.
B ) The end of the core is joined to the end of the transmission line.
B ) The end of the core is joined to the end of the outer coating layer.
(3) The stretchable transmission body according to (1) or (2), wherein an outer diameter of an end portion of the core member is larger than a wound inner diameter of a transmission line wound in a spiral shape.

  The stretchable transmitter of the present invention is terminal-processed so that the stretchability is not lost, and is useful as a wiring for equipment that involves stretching operations.

It is a schematic diagram of the elastic | stretch transmission body which enlarged the outer diameter of the core part edge part. It is a schematic diagram of the elastic | stretch transmission body which has joined the core material edge part and the transmission line edge part. It is a schematic diagram of the elastic | stretch transmission body which has joined the core material edge part and the outer coating layer edge part. It is a schematic diagram of the elastic | stretch transmission body which has folded the core material edge part and joined with the outer coating layer edge part. It is a schematic diagram of the elastic | stretch transmission body which has joined the core material edge part, the transmission line edge part, and the outer coating layer edge part. It is a schematic diagram of a stretchable transmission body in which a core material end and a transmission line end are joined, and further, a core material end, a transmission line end, and an outer coating layer end are joined. A model of a stretchable transmission body in which the outer diameter of the core end is increased, the core end and the transmission line end are joined, and the core material end, the transmission line end, and the outer covering end are joined. FIG. It is a schematic diagram which shows the holding | grip state of the sample for an extension test to the chuck | zipper part of a test apparatus.

The present invention will be specifically described below.
The stretchable transmission body of the present invention has an outer diameter at the end of the core material that is greater than or equal to the wound inner diameter of the spirally wound transmission line, or the end of the core material is the end of the transmission line. Or end processing using either a method of joining to an end portion of the outer coating layer or a combination thereof.

The core material can be formed from an elastic long fiber, an elastic tube, a coil spring, or the like.
Moreover, the core material may have a space | gap inside. The voids do not hinder the stretchability and can increase the winding diameter of the transmission line, and thus have the effect of reducing the stretch stress. The method of forming the void includes, for example, a method of arranging insulating fibers around the elastic long fibers, a method of braiding elastic long fibers or a thread-like body in which insulating fibers are arranged around the elastic long fibers, and elastic long fibers. There are a method of foaming, a method of hollowing out elastic long fibers, or a method of combining them. When formed from an elastic tube or coil spring, it is naturally hollow.

The elastic long fiber used in the present invention is not particularly limited as long as it is rich in stretchability. For example, polyurethane-based elastic long fibers, polyolefin-based elastic long fibers, polyester-based elastic long fibers, polyamide-based elastic long fibers, natural rubber-based elastic long fibers, synthetic rubber-based elastic long fibers, and composite rubber systems of natural rubber and synthetic rubber Examples thereof include elastic long fibers.
Polyurethane-based elastic long fibers are preferable because they have excellent durability. Natural rubber-based long fibers have the advantage that the stress per cross-sectional area is small compared to other elastic long fibers, a predetermined core material diameter is easily obtained, and the bending load is small. However, since it is easy to deteriorate, it is suitable for applications intended for short-term use. Synthetic rubber-based elastic long fibers are suitable because of their excellent durability. The elastic long fiber may be monofilament or multifilament.

The elastic tube has a gap inside, and can be used as a core material as it is, or can be formed as a core material by forming a fiber layer on the outer layer of the elastic tube. When the transmission line and the elastic tube are in direct contact with each other, the elastic tube is easily damaged. Therefore, it is preferable to form a fiber layer on the outer layer of the elastic tube.
Also, the transmission line can be embedded in the elastic tube. For example, after winding a transmission line on a stainless steel rod and immersing or coating it in a rubber latex, after performing a known method (for example, vulcanization treatment, heat treatment and drying treatment), the internal stainless steel rod is removed. By leaving or the like, the conductor wire can be embedded in the elastic tube.

  In order to increase the outer diameter of the core end, an adhesive is applied to the end of the core, a heat-shrinkable tube with an adhesive is applied, and a ring-shaped metal (so-called sleeve) is applied to the end of the core. Or the like), a string, a thread, a wire, a tie or the like is tied to the end of the core, and a knot is made to the end of the core. However, even if the end of the core becomes thick, the effect cannot be achieved if the spiral shape of the end of the transmission line breaks down, so the end of the transmission line is hardened with an adhesive, etc. so that the spiral shape is kept constant. It is preferable to do. FIG. 1 shows an example of a method for increasing the outer diameter of an end portion of a core material, which is an elastic transmission body in Example 1 described later. In FIG. 1, as a method of thickening the end of the core material, a heat-shrinkable tube (5) with resin is applied to the end portion (1) of the core material, and an adhesive is applied to the end portion (2) of the spiral transmission line. The example which provided (4) is shown. In FIG. 1, (3) is an outer coating layer.

The method of joining the end of the core material and the end of the transmission line is to fix the end of the core material and the end of the transmission line with an adhesive, with an adhesive that extends over both the end of the core material and the transmission line. A method of bonding via a heat-shrinkable tube, the end of the core material is folded back at the end of the helical transmission line, and the folded core material end and the transmission line arranged in a spiral shape are bonded with an adhesive, There are methods such as wrapping and fixing vinyl tape or tying it with a string, thread, wire, vinyl tie, or the like.
Note that the term “joining” as used in the present invention means that two target objects are bonded or bonded directly or via a third substance.
FIG. 2 is an example of a method for joining the end of the core material and the end of the transmission line in the stretchable transmitter in Example 2 described later. FIG. 2 shows an example in which the core end portion (1) and the transmission line end portion (2) are joined together by a heat-shrinkable tube (6) with resin.

The method of joining the end of the core material and the end of the outer coating includes the method of joining the end of the core material and the end of the outer coating with an adhesive, and the adhesive spanning the end of the core material and the end of the outer coating. The method of joining via a heat-shrinkable tube, the end of the core material is folded back, the end of the folded core material and the end of the outer coating are adhered with an adhesive, the vinyl tape is wrapped and fixed, There are methods such as tying with thread, wire, vinyl tie, etc.
3 and 4 show an example of a method of joining the core material end and the outer covering end in the stretchable transmission body in Examples 3 and 4 to be described later. FIG. 3 (Example 3) shows an example in which the core material end portion (1) and the outer coating layer end portion (3) are joined via a heat-shrinkable tube (7) with an adhesive. FIG. 4 (Example 4) shows an example in which the core end (1) is folded and the folded core end and the outer covering layer end (3) are bound by an insulation lock (8).
FIG. 5 shows a stretchable transmission body in Example 5 to be described later. FIG. 5 shows the core material end (1), the transmission line end (2), and the outer covering layer end (3). The example which joined via the heat-shrinkable tube (7) with an adhesive agent was shown.

The terminal treatment of the elastic transmission body is performed by cutting the terminal, unwinding several millimeters of the wound transmission line, exposing the core material, and increasing the outer diameter of the core material end, or the core material end Join the transmission line end or the outer covering layer end, or fold the core end at the end of the transmission line, and join the end of the core to the outer covering layer end or the transmission line end body. Etc.
When cutting the elastic transmission body, the core part may be pulled back inside, so the string near the place to be cut (approximately 10mm to 50mm before the planned cutting position (on the side of the elastic transmission body to be processed)) It can also be processed by pressing with an insulation lock, a clip or the like so that the core portion is not easily pulled back.

In accordance with the above, after joining the end of the core material to the end of the transmission line or the outer coating layer, and further extending the outer periphery of the entire joint, vinyl tape, tube, heat shrink tube, heat shrink with adhesive It can be covered with a tube. FIG. 6 shows a stretchable transmission body in Example 6 to be described later, in which the core end (1) and the transmission line end (2) are joined together by a heat-shrinkable tube (6) with an adhesive, and this heat-shrink with an adhesive. An example is shown in which the tube (6) and the outer coating layer end (3) are joined and covered with a heat-shrinkable tube (7) with an adhesive that straddles each other.
FIG. 7 shows a stretchable transmission body in Example 7 to be described later. The outer diameter of the core material end (1) is increased by the heat-shrinkable tube (5) with an adhesive, and then the core material end (1) and the core material end (1). The heat-shrinkable tube with adhesive (5) and the transmission line end (2) are bonded to each other by the heat-shrinkable tube with adhesive (6), and the heat-shrinkable tube with adhesive (6) and the outer coating An example is shown in which the layer end (3) is joined and covered with a heat-shrinkable tube (7) with an adhesive straddling each other.

  These methods may be used alone or in combination. A combination of a plurality of good appearance and high reliability is recommended (for example, FIGS. 6 and 7). On the other hand, from the viewpoint that the outer diameter of the entire stretchable transmission terminal can be reduced, a method of increasing the outer diameter of the core material end or joining the core material end and the transmission line end is recommended. The method of joining the end of the core material and the end of the transmission line with a heat-shrinkable tube with adhesive is one step, can maintain the spiral shape of the transmission line and prevent the core material from coming off, and the overall outer diameter does not become too large Therefore, it is preferable. However, when it has an outer coating layer, it is necessary to take measures such as applying heat or applying an adhesive so that the end of the outer coating layer cannot be unwound. If the external appearance and outer diameter are not concerned, the method shown in FIG.

The transmission line used in the present invention includes a power transmission line for sending electricity, an electronic signal transmission line for sending electrical signals, an optical transmission line for sending light, a heat transmission line for sending heat, a liquid transmission line for sending liquid, and a gas for sending gas. A transmission line etc. are mentioned.
A transmission line for sending electric power or an electric signal is generally called an electric wire, and is preferably a collection of thin wires made of a material having good conductivity. The assembly line of fine metal wires is soft and it is easy to obtain a stretchable transmission body rich in stretchability.

A substance having good conductivity means an electric conductor having a specific resistance of 1 × 10 ⁻⁴ Ω · cm or less. Particularly preferred is a metal having a specific resistance of 1 × 10 ⁻⁵ Ω · cm or less. Specific examples include so-called copper (specific resistance is 0.2 × 10 ⁻⁵ Ω · cm) and aluminum (specific resistance is 0.3 × 10 ⁻⁵ Ω · cm).

  The copper wire is most preferable because it is relatively inexpensive, has low electrical resistance, and can be easily thinned. Aluminum wires are preferred after copper wires because they are lightweight. Copper wire is generally annealed copper wire or tin-copper alloy wire, but strong copper alloy with enhanced strength (eg, oxygen-free copper added with iron, phosphorus, indium, etc.), tin, gold, silver or platinum For example, it is possible to use a material that has been plated to prevent oxidation, a surface treated with gold or another element, and the like, but is not limited thereto.

A transmission line for sending light is generally called an optical fiber, and the optical fiber used in the present invention is preferably a flexible optical fiber having good transmission characteristics. As the transmission loss is small even with a small bending radius, a holey type having a large number of holes around the core and a multi-core type divided into a large number of fine wires are known. In the present invention, a holey type is preferably used as the glass optical fiber, and a multi-type is preferably used as the plastic optical fiber. A GI type multimode optical fiber developed in recent years is also preferably used. Examples of the plastic material include polymethyl methacrylate, polycarbonate, and fluorine-based polymer.
Examples of the transmission line for sending heat include a nichrome wire. A tube is an example of a transmission line for sending air or liquid.

In the stretchable transmission body of the present invention, the transmission line is spirally wound around the core material. When a plurality of transmission lines are wound, the transmission line is wound in the same direction even when wound by S / Z. May be turned. Those that are wound in the same direction are preferable in that they are easy to expand and contract and are not easily broken.
In the stretchable transmission body of the present invention, it is preferable that the core material and the transmission line can be displaced from each other, and the core material is retracted into the stretchable transmission body so that the core material and the transmission line are not displaced. However, there is a drawback that the stretchability is poor.

More preferably, the transmission line is constrained to the core by an insulating thread-like body at one or more places per winding. In the case of unconstrained, the distance between the transmission lines fluctuates due to expansion and contraction and bending, and stress concentration is likely to occur, so that the transmission performance and life are likely to be reduced.
A known insulating filamentous body can be arbitrarily used for the insulating filamentous body. For example, multifilament, monofilament, or spun yarn can be used. A multifilament is preferable. From the viewpoint of being thin, soft, strongly binding (high strength), and inexpensive, polyester fibers and nylon fibers can be mentioned. From the viewpoint of a low dielectric constant, fluorine fibers, polyethylene fibers, and polypropylene fibers can be mentioned. From the viewpoint of flame retardancy, examples include vinyl chloride fiber, saran fiber, and glass fiber. From the viewpoint of stretchability, polyurethane fibers or those obtained by coating the outside of the polyurethane fibers with other insulating fibers can be used. In addition, silk, rayon fiber, cupra fiber, and cotton spun yarn can also be used. However, it is not limited to these, and known insulating fibers can be arbitrarily used.

The transmission line is wound in one direction (for example, the Z direction), and the insulating thread body is wound in the reverse direction (S direction) from above, thereby restraining the transmission line and preventing displacement due to expansion and contraction or bending. be able to.
More preferably, the transmission line is constrained by alternately winding the inner side (core material side) and the outer side of the transmission line in the opposite direction to the transmission line and winding the insulating yarn state. By alternately winding the inner and outer sides of the transmission line and winding the insulating filament in the opposite direction to the transmission line, there is little change in the transmission line spacing due to expansion and contraction, and repeated expansion and contraction. An elastic transmission body with little change in the transmission line spacing can be obtained. When the inside and the outside of the transmission line are alternately passed, the transmission lines may be alternately passed, or a plurality of transmission lines may be alternately passed.
The insulating thread is preferably thinner than the transmission line. When a thick insulating yarn state is used, the transmission line itself is inevitably deformed, and the stretchability, the stretch life, and the flex life are reduced.

In order to increase the binding force, the insulating yarn state is wound by alternately passing the inner side and the outer side of the transmission line so as to have one or more points, preferably four points or more, more preferably eight points or more per round. It is preferable to do.
By applying a load to the yarn to be wound, the winding tension can be increased and the binding force can be increased.

  Also, in order to prevent the positions of the transmission lines from shifting, an insulating thread is interposed between the transmission lines, and the transmission line and the interposed thread are combined together or separately, inside and outside of them. It is also possible to wind the insulating filaments alternately. By this inclusion, a cushioning property can be given between the transmission lines, and the life can be extended.

The transmission lines are preferably wound at a constant pitch in the same direction. If the pitch varies in the length direction, local deformation is likely to occur, stress is concentrated, and disconnection is likely to occur.
The winding pitch of the transmission line is preferably 0.05 to 50 mm. In the case of 0.05 mm or less, the length of the wound transmission line becomes too long, and the transmission performance deteriorates. In the case of 50 mm or more, the stretchability becomes poor. The winding pitch is preferably 0.1 to 20 mm, and particularly preferably the winding pitch is 1 to 10 mm.

  The wound diameter of the transmission line is preferably 0.05 to 30 mm. More preferably, it is 0.1-20 mm, Most preferably, it is 0.5-10 mm. In the case of 30 mm or more, the finished outer diameter becomes too large, which is not preferable. In the case of 0.05 mm or less, it is difficult to wind the transmission line.

  When the transmission line is a conductor or a heating element, the distance between two adjacent transmission lines is preferably 0.01 to 20 mm. If it is less than 0.01 mm, there is a risk of short circuit or overheating. More preferably, it is 0.02-10 mm, Most preferably, it is 0.05-5 mm.

The distance between the adjacent transmission lines wound in parallel is an average distance d obtained by observing 30 winding states in a straight line, and a variation r (r = maximum distance−minimum distance). Is preferably 0 ≦ r <4d. When there is a variation of 4d or more, the bending life is reduced. Preferably it is 3d or less, More preferably, it is 2d or less. In the present invention, the distance between adjacent transmission lines is the shorter of the distances between adjacent transmission lines, and is represented by the distance between the centers.
When the pitch, winding diameter, and interval of the transmission line are set in the above ranges, it becomes easy to obtain a stretchable transmission body excellent in stretchability and flexibility.

The stretchable transmission body of the present invention may have an outer coating layer.
By having the outer coating layer, it is protected from physical stimulation and chemical stimulation, and durability is improved. The outer coating layer is preferably formed of an insulating fiber or an elastic resin having rubber elasticity.

The coating with insulating fibers has little effect on surface deterioration due to bending, and has an effect of maintaining the role of protecting the transmission line by a cushion effect for a long period of time.
Insulating fibers are preferably those having a bulky property from the viewpoint of including an air layer. Wooled nylon or ester can be used.

For the insulating fiber layer, a fluorine fiber, a polyethylene fiber, or a polypropylene fiber having a low dielectric constant can be used from the viewpoint of transmission properties.
Water-repellent insulating fibers are preferable because they have the effect of preventing water from entering. Specifically, a water-repellent insulating fiber such as a fluorine fiber or a polypropylene fiber can be used, or a polyester fiber or a nylon fiber can be subjected to a water-repellent finish. The water repellent finish can be arbitrarily selected from known finishes. Specific examples include fluorine-based and silicon-based water repellent finishing agents.

As the insulating fiber, a multifilament, a monofilament, or a spun yarn can be used. Multifilaments are preferable because they have good coverage and are less likely to cause fluff.
The insulating fiber may be a raw yarn as it is, but an original yarn or a pre-dyed yarn can also be used from the viewpoint of design and prevention of deterioration. By finishing, flexibility and friction can be improved. Furthermore, the handleability at the time of practical use can be improved by performing known fiber processing such as flame retardant processing, oil repellent processing, antifouling processing, antibacterial processing, antibacterial processing, and deodorizing processing.

  Examples of insulating fibers that achieve both heat resistance and wear resistance include aramid fibers, polysulfone fibers, and fluorine fibers. From the viewpoint of fire resistance, glass fiber, flame-resistant acrylic fiber, fluorine fiber and saran fiber can be mentioned. From the viewpoint of wear resistance and strength, high-strength polyethylene fibers and polyketone fibers are added. From the viewpoint of cost and heat resistance, there are polyester fiber, nylon fiber and acrylic fiber. Also suitable are flame retardant polyester fiber, flame retardant nylon fiber, flame retardant acrylic fiber (modacrylic fiber) and the like imparted with flame retardancy. For local deterioration due to frictional heat, it is preferable to use non-melted fibers. Examples thereof include aramid fibers, polysulfone fibers, cotton, rayon, cupra, wool, silk and acrylic fibers. When importance is attached to strength, high-strength polyethylene fiber, aramid fiber and polyphenylene sulfide fiber can be mentioned. When importance is attached to frictional properties, examples thereof include fluorine fibers, nylon fibers, and polyester fibers.

Coating with an elastic resin or coating with a rubber tube is preferably used for applications where there is a risk that liquid may enter the interior.
The elastic resin can be selected from various elastic insulating resins in consideration of bending resistance, wear resistance, heat resistance and chemical resistance, transmission properties, and the like.
Synthetic rubber-based elastic bodies can be cited as those excellent in abrasion resistance, heat resistance and chemical resistance, and fluorine-based rubber, silicone-based rubber, ethylene / propylene-based rubber, chloroprene-based rubber and butyl-based rubber are preferable.
Examples of materials that are easily bent include so-called natural rubber-based elastic resins and styrene-butadiene-based elastic resins.
The outer covering layer made of an insulating material can be a combination of an elastic resin and one braided with insulating fibers. Bend-resistant cables are easy to bend and often have a long service life. However, when coated with elastic resin alone, the elastic resin has a strong frictional force and tends to deteriorate during bending, so it is insulated from the outer periphery of the elastic resin layer. A fiber outer covering layer can also be combined.

  The stretchable transmission body of the present invention may be shielded. The shielding method can be obtained by braiding with electrically conductive organic fibers or metal wires with good electrical conductivity, winding a tape-like material (eg, aluminum foil) with good electrical conductivity, etc. it can.

After winding the transmission line on the core material, an insulating layer is constituted by insulating fibers, and a shield layer is formed on the outer periphery thereof. The shield layer can be obtained by braiding with electrically conductive organic fibers, metal wires with good electrical conductivity, or a combination thereof. For the purpose of protecting the shield layer, it is preferable to form an outer covering layer of an insulator on the outer layer of the shield layer.
The electrically conductive organic fiber means a specific resistance of 1 Ω · cm or less. For example, a plated fiber or a fiber filled with a conductive filler can be raised. More specifically, silver plating fiber etc. are mentioned.

  The stretchable transmitter of the present invention is preferably one that can be easily stretched. The 30% elongation load is preferably less than 5000 cN. More preferably, it is 3000 cN or less, More preferably, it is 1000 cN or less. Those having a viscosity of 5000 cN or more are not preferable because a large load is required for stretching.

  The terminal-processed stretchable transmission body of the present invention does not come off the core material of the terminal portion even when it is stretched 10,000 times in a predetermined stretch test. Even if it is repeated 100,000 times or more, more preferably 1,000,000 times or more, the core material of the terminal portion does not come off and the transmission line does not break, which is excellent in practicality.

  The stretchable transmission body of the present invention has a function of winding a plurality of transmission lines in parallel around the core material in a state where the stretchable core material is stretched, and is insulated in a direction opposite to the winding direction of the transmission line. One or more transmission lines are wound in parallel around the core material by a device having a function of winding the conductive filamentous body, and the insulating filamentous body is wound outside the transmission line in a direction opposite to the transmission line. Can be obtained by:

Preferably, the function of winding the insulating filament in the direction opposite to the winding direction of the transmission line is a function capable of winding the insulating filament through the inner side (elastic cylinder side) and the outer side of the transmission line alternately. Wind one or more transmission lines in parallel, and wind the insulating filaments through the inside and outside of one or more transmission lines in the opposite direction to the transmission lines to constrain the transmission lines It is to make the structure.
The device to be used is not particularly limited as long as the device has the above function.

The main mechanisms provided in the device having the above functions are as follows.
(1) A mechanism for supplying a core material.
(2) A mechanism that grips the core material and feeds it at a constant speed (preferably a mechanism that grips and feeds the core material at a constant speed without a nip, for example, a figure 8 in a V-groove of a double roll having a plurality of V-grooves A mechanism to grip and feed along the hook).
(3) A mechanism for gripping the core material and winding it at a constant speed (preferably a mechanism for gripping and winding at a constant speed without nip, for example, a figure of 8 in a V-groove of a double roll having a plurality of V-grooves. A mechanism that grips and winds along the hook, or a mechanism that winds by winding a plurality of times around the V-groove of a large-diameter drum having a V-groove).

  (4) A mechanism that winds the transmission line or the transmission line and the insulating filament in parallel with the core while tension is applied to the core (for example, the bobbin around which the transmission line or the insulating filament is wound is gripped) A mechanism for turning around the core material, a mechanism for rotating the gripped core material to wind the transmission line or the insulating filament around the core material, or a plurality of windings around the transmission line or the insulating filament A mechanism in which the hollow bobbins are arranged in series, and the transmission wire is wound around the core material by rotating the hollow bobbin while passing the core material through the hollow portion of the hollow bobbin).

  (5) A mechanism for winding the insulating filament in parallel with the core material in a direction opposite to the winding direction of the transmission line in a state where tension is applied to the core material, particularly preferably, in a state where the core material is stretched, A mechanism for winding the insulating filaments alternately through the inside and outside of the transmission line in the direction opposite to the winding direction of the transmission line (for example, winding one or more bobbins wrapped around the transmission line and the insulating filament) One or more bobbins that have been moved back and forth or up and down and swivel around the core material in opposite directions).

Hereinafter, the present invention will be described in detail based on examples and comparative examples, but the present invention is not limited to these examples.
The evaluation method used in the present invention is as follows.

(1) Stretch test A sample was prepared so that the distance between the outer coating layer end portions of the stretchable transmission body was 300 mm and the distance between the transmission line end portions was 380 mm. As shown in FIG. 8, the chuck portion was gripped, the stroke length was adjusted so that the distance between chucks was 340 mm to 510 mm, and expansion and contraction were repeated 10,000 times at 200 rpm.

(2) Talmi determination The distance between the end portions of the outer coating layer was obtained before the stretching test and after standing for 18 hours or more after leveling after the stretching test, and the tarmi rate was determined according to the following formula.
Tarmi rate: X (%) = (L2−L1) / L1 × 100
In the above formula, L1 is the distance between the end portions of the outer coating layer before the stretching test, and L2 is the distance between the end portions of the outer coating layer after the stretching test.
The obtained tarmi rate was determined according to the following criteria.
○: X <10 (small tarmi)
X: X ≧ 10 (large tarmi)

(3) Stretch rate A mark with a length of 20 cm is attached to the center of the sample and placed vertically, the length of the mark is measured by applying a load of 300 cN, and a stretch rate of 300 cN is obtained. Asked.
Elasticity maintenance ratio: X (%) = (B / A) × 100
In the above formula, A is the elongation rate before the stretch test, and B is the stretch rate after the stretch test.
The obtained stretchability maintenance rate was determined according to the following criteria.
○: X ≧ 90 (stretchability is maintained)
X: X <90 (elasticity was lost)

(Examples 1-8 and Comparative Example 1)
A 940 dtex polyurethane elastic long fiber (Asahi Kasei Fibers Co., Ltd., trade name: Leica) is used as the core, and the stretch ratio is 4.2 times lower. And it twisted by the top twist of 500T / M, and the double cover yarn was obtained. The obtained double cover yarn is wound around a bobbin for string making, and the four bobbins are evenly distributed in the S direction of the 8-pitch stringing machine (manufactured by Sakurai Tetsuko) and two in the Z direction. A braid was prepared by placing the core, and a core material having a diameter of 1.8 mm was obtained. The core material is fed into a special stringing machine ((1) a mechanism for supplying the core material as a core part, and (2) the core material is attached to the V-groove of a double roll having a plurality of V-grooves in the shape of 8 characters. (3) A mechanism for gripping and winding the core material along the V-shaped groove of a double roll having a plurality of V-grooves along the shape of 8; (4) Core material A mechanism for winding the transmission line in parallel with the core material in the stretched state, and (5) the inner side and the outer side of the transmission line alternately in the direction opposite to the winding direction of the transmission line in the stretched state of the core material. A predetermined transmission line (manufactured by Sumitomo Electric) AWM1571 AWG28: 44 / 0.05 while being stretched 2.2 times by a stringing machine having a mechanism for winding an insulating filament through ) Four pieces are wound in parallel in the Z direction at equal intervals, and four polyester fibers (56 dtex (12f)) are placed in the S direction on the inside and outside of the transmission line. The elastic transmission body was obtained by alternately winding and winding in parallel at equal intervals.
Using this stretchable transmitter, terminal processing was performed by the various methods described above, and a stretch test was performed.
The evaluation results of the obtained stretchable transmission body are shown in Table 1 together with the terminal processing state.

表１から、本発明の伸縮性伝送体は伸縮しても端末部の芯材のスヌケが無く、伸縮性が失われないものであることがわかる。

From Table 1, it can be seen that the stretchable transmitter of the present invention does not lose the stretchability of the core material of the terminal portion even when stretched and contracted.

  The stretchable transmission body of the present invention is suitable for wiring of devices and devices that require stretchability such as bending and stretching, such as body-worn devices and clothes-worn devices, in the field of robots, and particularly humanoid robots (internal wiring). And outer wiring), power assist devices, wearable electronic devices and the like. Other robots (industrial robots, home robots, hobby robots, etc.), rehabilitation aids, vital data measuring equipment, motion capture, protective clothing with electronic equipment, game controllers (including human-mounted type) and microphones It can be suitably used in such fields.

DESCRIPTION OF SYMBOLS 1 Core material edge part 2 Transmission line edge part 3 Outer coating layer edge part 4 Adhesive 5 Heat shrinkable tube with adhesive 6 Heat shrinkable tube with adhesive 7 Heat shrinkable tube with adhesive 8 Insulok

Claims (3)

A stretchable transmission body having a structure in which a transmission line is spirally wound around a stretchable core material, wherein the end of the core material is joined to the end of the transmission line. Stretchable transmission body. An elastic transmission body having a structure in which a transmission line is spirally wound around an elastic core material and an outer coating layer is provided on the outside thereof, and has one or more of the following structures: An elastic transmission body characterized by that.
B ) The end of the core is joined to the end of the transmission line.
B ) The end of the core is joined to the end of the outer coating layer. The stretchable transmission body according to claim 1 or 2, wherein an outer diameter of an end portion of the core member is larger than a wound inner diameter of a transmission line wound in a spiral shape.

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