JP2010136485A - Water stop structure and method for wiring material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water stop structure and a method for a wiring material, for exhibiting sufficient water stop performance by holding a water stop material at a targeted position and preventing contamination due to the water stop material to its surrounding. <P>SOLUTION: The water stop method for wiring materials includes the steps of allowing a liquid water stop material 3 to permeate a gap between the plurality of bundled electric wires W and harding the water stop material 3. As the water stop material 3, a magnetic fluid containing hard ferrite is used. In this method, the water stop material 3 is allowed to permeate the gap between the electric wires W, and the water stop material 3 is hardened with magnetic field applied by a magnet 2 from the outside of the bundle of the electric wires W so that the water stop material 3 gathers into a predetermined point from the outside of a sheet 1 for covering the periphery of the bundle of electric wires W. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a water-stopping structure for a wire material and a water-stopping method for the wire material that stops a gap between electric wires constituting a wire harness or a gap between core wires of a covered electric wire (in addition, “water stop” in the description of the present invention) Means not only to prevent the ingress of water but also to effectively act on all liquids including water, oil, alcohol, etc. ”).

  As a water stop method for sealing a gap between the wires of the wire harness (that is, between the wire members forming the wire harness) with a water stop material, as shown in FIG. After the waterproof material 200 is applied to the bundle of the electric wires W, the sheet (that is, the cover material) 10 is wound around the applied portion, and then the sheet 10 is temporarily fixed with a clip (not shown). It is known that the clip is removed from the sheet 10 after the 200 is cured, the portion of the sheet 10 is covered with a neck portion of a not-shown grommet, and the grommet is fixed to the wire harness (for example, Patent Document 1). reference). In this case, the filling width B (the length covered by the sheet 10) of the waterproofing material 200 in operation is larger than the required waterproofing width A of the waterproofing material 200.

  In this method, only the sheet 10 is wrapped after the water-stopping material 200 is applied. Therefore, the water-stopping material 200 flows through the gap between the electric wires W due to the capillary phenomenon, and flows out to the outside of the necessary water-stopping width A. There is a possibility that the water stop performance of the street cannot be secured. Further, the protruding portion 201 of the water blocking material 200 that protrudes outside the sheet 10 may contaminate the surroundings. Thus, after the water blocking material 200 penetrates into the gap between the electric wires W and the gap between the electric wires W and the inner surface of the sheet 10 so that the protruding portion 201 becomes large, the cured wire harness has a long distance in the length direction. Therefore, the flexibility required for the wire harness is low.

  Next, an example of a water stop method for sealing a gap between core wires of a covered electric wire (that is, between wires forming the covered electric wire) with a water stop material will be described with reference to FIG. As shown in FIG. 14, the covered electric wire 51 has an insulating coating (that is, a cover material) 54 around the plurality of core wires (conductors) 53. A connection terminal 52 is crimped to the terminal portion of the covered electric wire 51 (ie, crimped).

  The crimping of the connection terminal 52 to the covered electric wire 51 is performed by setting the end portion of the covered electric wire 51 from which the insulation coating 54 is removed and the core wire 53 is exposed between the barrels 55 of the connection terminal 52 and caulking the barrel 55. In this way, the core wire 53 and the insulation coating 54 are fixed to the connection terminal 52 by crimping.

  In such a water stopping method for stopping the gap between the core wires 53 of the covered electric wire 51 with the connection terminal 52, a chain line ellipse 60 from above (that is, from the front side in FIG. 14) with respect to the terminal portion of the covered electric wire 51. A fluid water-stopping material is dropped and supplied, and the water-stopping material is infiltrated into the inside of the insulating coating 54, whereby the gap between the core wires 53 and the core wire 53 and the inner surface of the insulating coating 54 are separated. It aims to fill the gap with water-stopping material. An adhesive such as Aron Alpha (registered trademark) manufactured by Toagosei Co., Ltd. is used as the water stop material.

  However, in the water stop treatment by this method, the water stop material does not flow uniformly into the gap between the core wires 53 and the gap between the core wire 53 and the inner surface of the insulating coating 54 due to capillary action. Therefore, even if a specified amount of water-stopping material is dropped and supplied to the center of the chain line ellipse 60, a gap is formed between the core wires 53 or between the core wire 53 and the insulating coating 54 (that is, the gap remains). ) There is a high possibility that the desired water stop effect cannot be obtained.

  Therefore, if a large amount of water-stopping material is dropped and supplied to the center of the chain line ellipse 60, the water-stopping material works effectively in terms of filling the gap, but the water-stopping material penetrates more than the necessary water-stopping width. The disadvantage that it will end up. That is, after the water stop material has penetrated into the gap between the core wires 53 and the gap between the core wire 53 and the insulation coating 54 more than the required water stop width, the hardened covered electric wire 51 has a hard portion over a long distance in the length direction. Therefore, the flexibility required for the covered electric wire 51 (that is, the wire harness) is low.

  As described above, in the water stop structure in which it is difficult to confirm how far the water stop material that has penetrated into the gaps between the wires has penetrated, there is a variation in the reliability of the water stop treatment with the water stop method described above. It will occur.

JP 2005-73389 A

  The present invention has been made in view of the above-described circumstances, and its purpose is to be able to fasten the water-stopping material at the aimed position, so that sufficient water-stopping performance can be exhibited and the periphery is made of water-stopping material. An object of the present invention is to provide a water-stop structure and a water-stop method for a wire that does not cause contamination.

In order to achieve the above-mentioned object, the water stop structure of the wire according to the present invention is characterized by the following (1) to (4).
(1) A water-stopping structure for a wire obtained by infiltrating a liquid water-stopping material into a gap between a plurality of bundled wires, and then curing the water-stopping material,
As the water-stopping material, a magnetic fluid made of a composite material in which magnetic ultrafine particles of hard ferrite are dispersed in a liquid water-stopping agent is used, and the outer periphery of the bundle portion of the wire rod through which the water-stopping material permeates is used. Applying a magnetic field to the water-stopping material from the outside of the cover material to cover, the magnetic ultrafine particles become permanent magnets and adsorb to each other to fill the gaps between the wire rods at predetermined locations in the cover material. The water-stopping material is cured with the wall made.
(2) In the water stop structure of the configuration of (1) above,
The magnetic ultrafine particles of hard ferrite dispersed in the liquid water-stopper are in an unmagnetized state, and the surfactant is firmly adsorbed on the surface of each magnetic ultrafine particle.
(3) In the water stop structure of the configuration of (1) or (2) above,
The plurality of wires are electric wires forming a wire harness, and the water stop material penetrates into and cures the gap between the wires and the gap between the bundle of wires and the inner surface of the cover material.
(4) In the water stop structure of the above configuration (1) or (2),
The plurality of wires are core wires that form a covered electric wire, and the water-stopping material penetrates and is cured in a gap between the core wires and a gap between the bundle of the core wires and an inner surface of the insulating coating that is the cover material. thing.

According to the water stop structure of the above configuration (1), since the water stop material is collected and cured at the target position using magnetic force, it is possible to obtain the water stop performance as designed and out of the design range. It is possible to prevent the water-stopping material from protruding and soiling the surroundings. In particular, a material that contains magnetic fine particles of hard ferrite is used as a water-stopping material. Hard ferrite is harder to conduct electricity (higher electrical resistance) than metal magnetic materials, and is resistant to rust and chemicals. Even if the cover material is damaged and the bundle of wires is exposed, there is no fear of electric leakage or being attacked by chemicals.
According to the water stop structure of the above configuration (2), since the magnetic ultrafine particles of hard ferrite in an unmagnetized state are used, the magnetic ultrafine particles that are made permanent magnets by exposure to a magnetic field and the hardened water stop agent provide a solid structure. A water barrier can be made and highly reliable water stop performance can be demonstrated. That is, the magnetic ultrafine particles of hard ferrite are mixed in the water stop agent in an unmagnetized state so that they do not stick to each other before injection. When it is hung, it has hard magnetism and becomes a permanent magnet. Since each magnetic ultrafine particle becomes a small permanent magnet, it sticks to each other to form a wall that fills the gap between the wires, and the water-stopper is cured in this state. A solid wall is formed by the accumulated body and water-stopping agent, and the function of the wall makes it possible to exhibit highly reliable water-stopping performance.
According to the water stop structure having the above configuration (3), the gap between the electric wires constituting the wire harness and the gap between the bundle of electric wires and the inner surface of the cover material are effectively stopped. In this water stop structure, the gap is stopped without reducing the flexibility required for the wire harness as much as possible. Moreover, the electric wire which put together the magnetic body of the water stop material like this water stop structure has a noise reduction effect, when it supplies with electricity like the case where a ferrite is mounted | worn.
According to the water stop structure having the above configuration (4), the gap between the core wires constituting the covered electric wire and the gap between the bundle of the core wires and the inner surface of the insulating coating are effectively stopped. Moreover, in this water stop structure, the said gap is water stopped, without reducing the flexibility required for a covered electric wire as much as possible. Moreover, the core wire which put together the magnetic body of the water stop material like this water stop structure has a noise reduction effect when energized like the electric wire with the ferrite attached.

In order to achieve the above-described object, the wire water stopping method according to the present invention is characterized by the following (5) to (8).
(5) A water-stopping method for a wire, in which a liquid water-stopping material is infiltrated into a gap between a plurality of bundled wires, and the water-stopping material is cured.
As the water-stopping material, a magnetic fluid made of a composite material in which hard ferrite magnetic ultrafine particles are dispersed in a liquid water-stopping agent is used.
The water-stopping material is infiltrated into the gap between the wire rods, and then a magnetic field is applied by a magnet from the outside of the cover material that covers the outer periphery of the bundle of wire rods through which the water-stopping material permeates. By collecting the water material at a predetermined location in the cover material and making the hard ferrite in the water stop material become permanent magnets and adsorbing each other, a wall of the water stop material filling the gap between the wires is formed, Curing the waterstop material in a state.
(6) In the water stopping method of the configuration of (5) above,
Magnetic fluid made of a composite material in which magnetic ultrafine particles of hard ferrite in an unmagnetized state are dispersed in a liquid waterstopper and the surface of each magnetic ultrafine particle is chemically adsorbed as the waterstop material. Use.
(7) In the water stopping method of the above configuration (5) or (6),
The plurality of wires are wires that form a wire harness, and the water-stopping material is infiltrated into the gaps between the wires, and a magnet is attached from the outside of the sheet that covers the outer periphery of the bundle of wires as the cover material. Applying a magnetic field to collect the water stop material at the predetermined location.
(8) In the water stop method of the above configuration (5) or (6),
The plurality of wires are core wires forming a covered electric wire, and the water stop material is infiltrated into a gap between the core wires and a gap between the bundle of the core wires and the inner surface of the insulating coating that is the cover material. Applying a magnetic field with a magnet from the outside of the insulation coating to collect the water stop material at the predetermined location.

According to the water stop method of the above configuration (5), by using a magnet, the water stop material can be collected and cured at a target position for a required time, so that the water stop performance as designed is obtained. It is possible to prevent the water-stopping material from protruding outside the design range and contaminating the surroundings.
According to the water-stopping method having the configuration of (6) above, since the water-stopping material containing magnetic ultrafine particles of unmagnetized hard ferrite is used, the magnetic ultrafine particles made permanent magnets by exposure to a magnetic field And a hardened water-stopping agent can form a firm water-stop wall, and can exhibit highly reliable water-stopping performance. That is, the magnetic ultrafine particles of hard ferrite are mixed in the water stop agent in an unmagnetized state so that they do not stick to each other before injection. When it is hung, it has hard magnetism and becomes a permanent magnet. And each one of the magnetic ultrafine particles becomes a small permanent magnet, so that they can stick to each other to form a wall that fills the gap between the wires, and by curing the waterstop agent in that state, It is possible to make a strong wall made of a permanent magnet assembly and a water-stopping agent, and the function of the wall can exhibit highly reliable water-stopping performance. In addition, hard ferrites are harder to conduct electricity than metal magnetic materials (high electrical resistance) and are strong against rust and chemicals, so even if the cover material is damaged and a bundle of wires is exposed, electric leakage may occur, There is no worry about being attacked by chemicals.
According to the water stopping method having the above configuration (7), it is possible to effectively stop the gap between the electric wires constituting the wire harness and the gap between the bundle of electric wires and the inner surface of the cover material. Moreover, in this water stop method, the clearance gap between electric wires can be stopped, without reducing the flexibility required for a wire harness as much as possible. In addition, since the bundle of electric wires obtained by carrying out this water stopping method is bundled with the magnetic body of the water stopping material, there is a noise reduction effect when energized as in the case where ferrite is attached.
According to the water stopping method having the above configuration (8), it is possible to effectively stop the gap between the core wires constituting the covered electric wire and the gap between the bundle of the core wires and the inner surface of the insulating coating. Further, in this water stopping method, the gap between the core wires can be stopped without reducing the flexibility required for the covered electric wire as much as possible. Moreover, since the covered electric wire obtained by carrying out this water stopping method combines the magnetic body of the water stopping material, it produces a noise reduction effect when energized, as in the case where ferrite is attached.

  According to the present invention, the water-stopping material can be retained at the target position, so that a sufficient water-stopping performance can be exhibited, and there is no possibility of soiling the surroundings with the water-stopping material.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

<First Embodiment>
FIG. 1 is a diagram showing a state in which the water stop method of the first embodiment is performed, FIG. 1 (a) is a perspective view, and FIG. 1 (b) is a diagram for explaining the principle (cross section of a magnet). FIG. 2 is a schematic view for explaining the structure of the water-stopping material.

  In the water stop method of the first embodiment shown in FIGS. 1A and 1B, first, a sheet 1 as a cover material, a magnet 2, and a liquid water stop material 3 are prepared. As the sheet 1, a nonmagnetic resin sheet or the like through which the magnetic flux of the magnet 2 can pass and the liquid water-stopping material 3 does not penetrate is used. As the magnet 2, a ring-shaped permanent magnet that is magnetized (magnetized) in the radial direction and has magnetic poles (N pole and S pole) on the outer peripheral side and the inner peripheral side is used. In the present embodiment, the permanent magnet configured to be half-cracked is used as the magnet 2, but may be an integrally formed permanent magnet.

  As the water stop material 3, a magnetic fluid is used. That is, as shown in FIG. 2, the water-stopping material 3 has a plurality of magnetic ultrafine particles (that is, magnetic bodies) 3b in a liquid water-stopping agent (that is, a resin such as an adhesive) 3a serving as a base liquid. In this case, the surfactant is firmly adsorbed on the surface of each magnetic ultrafine particle. The magnetic ultrafine particles 3b maintain a stable dispersed state without agglomeration in the water-stopping agent 3a due to intense thermal motion and mutual repulsive force of the surface surfactant layer. Here, as the magnetic ultrafine particles 3b, hard ferrite powder is used. The hard ferrite used here is a ferromagnetic material exhibiting hard magnetism, and is in an unmagnetized state when mixed with the water stop agent 3a.

  Next, the above-mentioned water-stopping material 3 is applied to a portion of the bundle of electric wires (in this embodiment, a covered electric wire using copper as a conductor) W to form a wire harness, and the gap between the electric wires W is applied. The sheet 1 is wound around a place where the water blocking material 3 is applied in a state where the water blocking material 3 is infiltrated. Thereafter, the magnet 2 is applied from the outside of the sheet 1 and a magnetic field is applied to the water stop material 3 from the outside of the sheet 1. Then, as shown in FIG. 1B, the gap between the electric wires W and the gap between the bundle of electric wires W and the inner surface of the sheet 1 are filled by the action of the magnetic lines 10 as shown in FIG. Gather together. Therefore, the water stop material 3 is cured while maintaining this state. By doing so, the water stop structure of the wire harness which the water stop material 3 was collected in the predetermined location in the sheet | seat 1 and was hardened is completed.

  In this water stop method, first, after applying the water stop material 3 to the bundle of the electric wires W, the sheet 1 is wound around the place where the water stop material 3 is applied. After the sheet 1 is wound around the bundle of W, a procedure of injecting the water stop material 3 into the gap between the electric wires W and the gap between the bundle of the electric wires W and the inner surface of the sheet 1 may be taken. The method in that case will be described later.

  Thus, by using the magnet 2, as shown in FIG. 3, the water stop material 3 can be collected at a target position for a required time and the water stop material 3 can be cured, so The water stopping performance can be obtained, and it is possible to effectively prevent the water stopping material 3 from protruding outside the design range and contaminating the surroundings.

  In addition, since the water stop material 3 contains the magnetic ultrafine particles 3b of hard ferrite in an unmagnetized state, as shown in FIGS. 4 (a) and (b), it was converted into a permanent magnet by exposure to a magnetic field. The hard water stop wall 30 can be made by the hard ferrite and the hardened water stop agent, and a highly reliable water stop structure can be obtained. In other words, hard ferrite is in a non-magnetic state and mixed in the water-stopping agent so that it does not stick to each other before injection. Because it shows, it becomes permanent magnet. Each hard ferrite grain becomes a small permanent magnet, thereby sticking to each other to form a wall that fills the gap between the electric wires W. Since the water-stopping agent is cured in this state, a strong wall 30 made of a permanent magnet and the water-stopping agent is formed, and a highly reliable water-stopping performance can be exhibited. FIG. 5 schematically shows the wall 30, but since the strong wall 30 made of a permanent magnet and a water-stopping agent fills the gap between the electric wires W, a strong water-stopping structure is completed.

  Therefore, it is possible to effectively stop the gap between the electric wires W constituting the wire harness and the gap between the bundle of the electric wires W and the inner surface of the sheet 1. Moreover, in this water stop method, the clearance gap between the electric wires W can be stopped, without reducing the flexibility required for a wire harness as much as possible. In addition, since the bundle of electric wires obtained by carrying out this water stop method is bundled with the magnetic body of the water stop material 3, it has a noise reduction effect when energized, as in the case where ferrite is attached. .

  In addition, when the hard magnetic magnetic ultrafine particles contained in the waterstop material 3 are made of a material that easily rusts like iron powder, it enters from both sides of the wire W as shown in FIG. Although it is usually a concern that the magnetic ultrafine particles 3b are rusted by the influence of the outside air and moisture S, the distribution of the magnetic ultrafine particles 3b is concentrated at the center of the water-stopping material 3 by the action of the magnet 2, and both sides thereof are collected. The water-stopping agent which is the main component of the water-stopping material 3 blocks outside air and moisture S and exhibits a rust prevention effect.

<Second Embodiment>
In 1st Embodiment mentioned above, this invention was applied when sealing the clearance gap between the electric wires (covered electric wire) W which comprises a wire harness, and the clearance gap between the bundle | flux of this electric wire W, and the inner surface of the sheet | seat 1 with a water stop material. Although the example has been described, the present invention can also be applied to the case where the gap between the core wires constituting the covered electric wire and the gap between the bundle of the core wires and the inner surface of the insulating coating around the core wire are sealed with a water stop material.

FIG. 6 shows an example of a water stop structure and a water stop method in that case.
In this case, the water-stopping material 3 is dropped from the water-stopping material supply device 20 onto the exposed portion of the copper core wire Wa at the terminal portion of the covered electric wire W, and between the core wires Wa of the planned water-stopping location using a capillary phenomenon. The water blocking material 3 is infiltrated into the gap.

  Thereafter, the magnet 2 is applied from the outside of the insulating coating Wb, and a magnetic field is applied to the water stop material 3 from the outside of the insulating coating Wb. If it does so, it gathers so that the clearance gap between the core wires Wa and the clearance gap between this core wire Wa and the inner surface of the insulation coating Wb may fill with the effect | action of a magnetic force line similar to the above in the range which the water stop material 3 should water-stop. Therefore, the water stop material 3 is cured while maintaining this state. By doing so, the water stop structure of the wire harness which the water stop material 3 was collected and hardened in the predetermined location in the insulation coating Wb is completed.

  Also in this case, similarly to the first embodiment, the gap between the core wires Wa constituting the coated electric wire W and the gap between the bundle of the core wires Wa and the inner surface of the insulating coating Wb can be effectively stopped. Moreover, in this water stopping method, the gap between the core wires Wa can be stopped without reducing the flexibility required for the covered electric wire W as much as possible. Moreover, in the water stop structure of the covered electric wire obtained by carrying out this water stop method, since the magnetic body of the water stop material 3 is put together, noise reduction when energized is performed as in the case where ferrite is attached. There is an effect.

  In addition, by using the water-stopping material 3 containing hard ferrite, as in the above embodiment, a hard water-stopping wall can be made with the hard ferrite made permanent magnet and the hardened water-stopping agent. A highly reliable water stop structure can be obtained. In addition, when water-stopping treatment is performed using the water-stopping material 3 containing hard ferrite as described above, the hard ferrite is less likely to conduct electricity (has a higher electric resistance) than a metal magnetic material, and is resistant to rust and chemicals. Therefore, even if the insulation coating Wb is damaged and the bundle of core wires Wa is exposed, there is no fear of causing electric leakage or being attacked by chemicals.

  Further, as in the conventional example of FIG. 13, the water stop method of the second embodiment can be applied as shown in FIG. 7 even when the connection terminal 52 is the covered electric wire W attached to the terminal portion.

  Moreover, in the said 1st Embodiment and 2nd Embodiment, by applying the water stop material 3 to the bundle | flux of the electric wire W, or dripping it on the exposed part of the core wire Wa, a water stop material is provided to a water stop planned location. Although the case where 3 was infiltrated was shown, you may make it inject | pour a water stop material into a water stop scheduled location using an injection nozzle.

<Third Embodiment>
FIG. 8 is an explanatory view of the water stop method of the third embodiment when the water stop material 3 is supplied using the injection nozzle 22, (a) is a perspective view, and (b) is a partially broken sheet. It is a side view shown.

  In this water stopping method, first, the sheet 1 is wound around a portion of a bundle of electric wires (in this embodiment, a covered electric wire using copper as a conductor) W constituting the wire harness to be stopped. At that time, the injection nozzle 22 is wound around the sheet material 1 together with the electric wire W in a state where the injection nozzle 22 of the water-stopping material supply device 20 (in this case, a syringe-like instrument) is arranged inside the sheet 1. The tip of the injection nozzle 22 is inserted along the longitudinal direction of the electric wire W to the planned stop water position P in advance. And in this state, the water stop material 3 is inject | poured from the front-end | tip of the injection nozzle 22, and the water stop material 3 is osmose | permeated into the clearance gap between the electric wires W. FIG.

  Thereafter, the injection nozzle 22 is pulled out from the inside of the sheet 1, then the magnet 2 is applied from the outside of the sheet 1, and a magnetic field is applied to the water stop material 3 from the outside of the sheet 1. If it does so, it gathers so that the gap between the electric wires W over the range which the water stop material 3 should water-stop and the gap | interval of the bundle | flux of the electric wires W and the inner surface of the sheet | seat 1 will be filled with the effect | action of the magnetic force line 10. Therefore, the water stop material 3 is cured while maintaining this state. By doing so, the water stop structure of the wire harness which the water stop material 3 was collected in the predetermined location in the sheet | seat 1 and was hardened is completed.

  In this way, by using the magnet 2, the water stop material 3 is collected for the required time at the target position and the water stop material 3 is cured, so that the water stop performance as designed can be obtained. Further, it is possible to effectively prevent the waterproof material 3 from protruding outside the design range and contaminating the surroundings.

  In addition, since the injection of the water-stopping material 3 is performed using the injection nozzle 22 toward the target position in advance, it is possible to suppress the extra water-stopping material 3 from protruding outside the design position as much as possible, and to stop the water-stopping material. 3 can be used efficiently without waste. In addition, since the water stop material 3 is injected into the gap of the electric wire W in a state where the injection nozzle 22 is inserted in the longitudinal direction of the electric wire W to a target position in advance, the sheet 1 covers the bundle of the electric wires W. The water blocking material 3 can be permeated into the gap between the electric wires W without opening a hole in the sheet 1. Moreover, since the injection | pouring nozzle 22 is removed from the electric wire W before injection | pouring of the water-stopping material 3 before the water-stopping material 3 begins to harden | cure, the injection | pouring nozzle 22 does not become obstructive.

  In addition, although the case where a magnetic field was applied after injecting the water stop material 3 was shown in the said 3rd Embodiment, the water stop material 3 can also be inject | poured, applying a magnetic field. However, if a strong magnetic field is applied at the stage of injection of the water-stopping material 3, the fluidity of the water-stopping material 3 is deteriorated, and there is a possibility that the injectability and permeability are deteriorated. Therefore, the magnetic field at this stage is weakly applied. Is preferred.

  Moreover, although the said 3rd Embodiment demonstrated the case where the water stop structure was made in one place of the longitudinal direction of the bundle | flux of the electric wire W, as shown in FIG. It is also possible to make a water stop structure. In that case, the tip of the injection nozzle 22 is guided to the injection point of the water stop material 3 to inject the water stop material 3, and the magnet 2 is arranged at each injection point, and the same operation as above is performed. Just do it.

<Fourth embodiment>
In 3rd Embodiment mentioned above, although the case where the water stop material 3 was inject | poured into the clearance gap between the electric wires (covered electric wire) W which comprises a wire harness using the injection nozzle 22, between core wires which comprise a covered electric wire was demonstrated. A water-stopping material may be supplied to the gap using an injection nozzle.

  FIG. 10 shows an example of the water stop method of the fourth embodiment in that case. In this case, the injection nozzle 22 of the water-stopping material supply device 20 is inserted from the exposed portion of the copper core wire Wa at the terminal portion of the covered electric wire W, and the tip of the injection nozzle 22 reaches the location where the water should be stopped. . And in that state, the water stop material 3 is inject | poured from the front-end | tip of the injection nozzle 22, and the water stop material 3 is osmose | permeated in the clearance gap between the electric wires W of the water stop plan part.

  Thereafter, the injection nozzle 22 is pulled out from the inside of the insulating coating Wb, the magnet 2 is then applied from the outside of the insulating coating Wb, and a magnetic field is applied to the water stop material 3 from the outside of the insulating coating Wb. If it does so, it gathers so that the clearance gap between the core wires Wa and the clearance gap between this core wire Wa and the inner surface of the insulation coating Wb may fill with the effect | action of a magnetic force line similar to the above in the range which the water stop material 3 should water-stop. Therefore, the water stop material 3 is cured while maintaining this state. By doing so, the water stop structure of the wire harness which the water stop material 3 was collected and hardened in the predetermined location in the insulation coating Wb is completed.

  Also in this case, similarly to the first embodiment, the gap between the core wires Wa constituting the coated electric wire W and the gap between the bundle of the core wires Wa and the inner surface of the insulating coating Wb can be effectively stopped. Moreover, in this water stopping method, the gap between the core wires Wa can be stopped without reducing the flexibility required for the covered electric wire W as much as possible. Moreover, in the water stop structure of the covered electric wire obtained by carrying out this water stop method, since the magnetic body of the water stop material 3 is put together, noise reduction when energized is performed as in the case where ferrite is attached. There is an effect.

  Moreover, in the said 4th Embodiment, when inject | pouring the water stop material 3 in the clearance gap between the core wires Wa of the position aimed beforehand, the front-end | tip of the injection nozzle 22 is inserted to the target location along the core wire Wa, and water stop is carried out. Although the case where the material 3 is injected has been described, as shown in FIGS. 11A and 11B, the insulating coating Wb is pierced and the tip of the injection nozzle 22 is pierced into the bundle of core wires Wa. Then, the water-stopping material 3 is injected between the core wires Wa, the injection nozzle 22 is pulled out in a state where the injected water-stopping material 3 has penetrated, and as shown in FIG. 12, the magnet 2 disposed around the insulating coating Wb. It is also possible to apply a magnetic field from the outside and cure the water stop material 3 in that state. In that case, a hole remains where the injection nozzle 22 is pierced into the insulating coating Wb. However, since the hole is very small, there is no fear of the water-stopping material 3 leaking outside when a magnetic field is applied. Since the hole is closed after the material 3 is hardened, no problem is caused in terms of water stopping performance.

  Note that the method of piercing the tip of the injection nozzle 22 into the bundle of core materials Wa can also be applied to injecting a water stop material into the gap between the electric wires W of the third embodiment.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  In the above-described embodiment, the magnetic ultrafine particles 3b of hard ferrite in an unmagnetized state are dispersed in the liquid water-stopping agent 3a as the water-stopping material 3, and the surface-active agent is strongly chemicalized on the surface of each magnetic ultrafine particle 3b. Although a magnetic fluid made of an adsorbed composite material was used, if the magnetic ultrafine particles 3b are uniformly dispersed in the water blocking agent 3a, the surfactant is strongly chemically adsorbed on the surface of each magnetic ultrafine particle 3b. It does not have to be.

  Moreover, about the magnet 2, what was comprised so that division | segmentation was possible, such as 2 division possible, 3 division possible, 4 division possible, etc. is preferable. A magnet that can be divided in this way is preferable because it can be easily arranged around the wire. For example, in the case of a magnet configured to be half-breakable, according to the arrangement of the magnetic poles (N pole and S pole) of the illustrated magnet, the outer peripheral side portion of the first semicircular arc part of the magnet is the N pole, and the inner peripheral side The portion becomes the S pole, the outer peripheral side portion of the second semicircular arc portion of the magnet becomes the S pole, and the inner peripheral side portion becomes the N pole. In this way, the ring-shaped magnet in the position where the N pole and the S pole face each other in the inner peripheral portion is preferable because the magnetic flux passing through the wire increases.

  However, the arrangement of the magnetic poles (N pole and S pole) of the magnet is not limited to the arrangement shown in the figure, and any arrangement may be used as long as the water stop material can be collected at a predetermined location. Further, the shape of the magnet is not limited to the ring shape, and any magnet can be used as long as the water stop material can be collected at a predetermined location. However, a ring-shaped magnet is preferred because it easily concentrates on the wire rod infiltrated with the water-stopping material from around and applies a magnetic field.

  Moreover, in the said water stop method, although the permanent magnet was used as the magnet 2, an electromagnet can also be used. In addition to direct current, alternating current can also be adopted as the current flowing through the electromagnet.

  For example, while alternating current is passed through an electromagnet, a very large number of needle-like hard magnetic ultrafine particles (needle-like) are used as a water-stopping material in a liquid water-stopping agent (that is, a resin such as an adhesive). Let us consider the case of using a magnetic fluid in which the magnetic material is uniformly dispersed. The surface of each magnetic ultrafine particle of the water-stopping material is chemically adsorbed with a surfactant as in the case of the water-stopping material 3 described above. Due to the mutual repulsive force of the layers, a stable dispersion state is maintained without agglomeration in the water-stopping agent. Others are the same as the first embodiment.

  In this case, an alternating magnetic field is generated by passing an alternating current through the coil of the electromagnet, and the water stop material is collected at a predetermined location by the alternating magnetic field. And while the needle-like magnetic body in a magnetic fluid (water-stop material) works as a fine magnet, and the direction is continuously changed by an alternating magnetic field, the water-stop material is agitated. Therefore, it becomes easy to fill the water stop agent of the water stop material at the target position. And the water stop structure of the wire harness which the water stop material was collected and hardened in the predetermined location by hardening a water stop material, maintaining this state is completed.

It is a figure which shows the state which is implementing the water stop method of 1st Embodiment of this invention, Comprising: (a) is a perspective view, (b) is a figure for demonstrating a principle (cross-sectional view of a magnet, and a sheet | seat) Including the inside perspective view). It is the schematic for demonstrating the structure of a water stop material. It is a figure which shows the distribution condition of the magnetic body in the water stop material at the time of implementing the water stop method of the embodiment. It is a conceptual diagram of the water stop wall produced when what contains hard ferrite is used as a water stop material, (a) is a perspective view, (b) is a sectional view exaggeratingly shown. It is sectional drawing which shows the actual way of the water stop wall. It is a figure which shows the state which is implementing the water stop method of 2nd Embodiment of this invention, (a) is a perspective view, (b) is a figure for demonstrating a principle (cross-sectional view of a magnet, and insulation) Including a cross-sectional view of the coating). It is a side view which shows the example of application of the said 2nd Embodiment. It is explanatory drawing of the water stop method of 3rd Embodiment of this invention, (a) is a perspective view, (b) is a side view which fractures | ruptures and shows a part of sheet | seat. It is explanatory drawing of the water stop method in the case of performing water stop of several places together. It is a perspective view which shows the state which is implementing the water stop method of 4th Embodiment of this invention. It is a figure which shows the state which is implementing the water stop method of the modification of 4th Embodiment, (a) is a sectional side view, (b) is a cross-sectional view. It is a side view which shows a mode that the water stop material is concentrated on the specific location using a magnet, after finishing injection | pouring of the water stop material in the clearance gap between the core wires of a covered electric wire. It is a perspective view which shows a prior art example. It is a top view which shows another prior art example.

Explanation of symbols

1 Sheet (cover material)
2 Magnet 3 Water-stopping material 3a Water-stopping agent 3b Magnetic ultrafine particles (hard ferrite)
30 Water blocking wall W Electric wire (wire)
Wa Core wire Wb Insulation coating (cover material)

Claims (8)

A water-stop structure of a wire material obtained by infiltrating a liquid water-stop material into a gap between a plurality of bundled wires, and curing the water-stop material,
As the water-stopping material, a magnetic fluid made of a composite material in which magnetic ultrafine particles of hard ferrite are dispersed in a liquid water-stopping agent is used, and the outer periphery of the bundle portion of the wire rod through which the water-stopping material permeates is used. Applying a magnetic field to the water-stopping material from the outside of the cover material to cover, the magnetic ultrafine particles become permanent magnets and adsorb to each other to fill the gaps between the wire rods at predetermined locations in the cover material. A waterproofing structure for a wire, wherein the waterproofing material is cured in a state where a wall is formed.   2. The magnetic ultrafine particles of hard ferrite dispersed in the liquid water-stopping agent are in an unmagnetized state, and a surfactant is firmly adsorbed on the surface of each magnetic ultrafine particle. The water stop structure of the described wire.   The plurality of wires are electric wires forming a wire harness, and the water stop material penetrates and hardens in a gap between the wires and a gap between the bundle of wires and the inner surface of the cover material, The water stop structure of the wire according to claim 1 or 2.   The plurality of wires are core wires that form a covered electric wire, and the water-stopping material penetrates and is cured in a gap between the core wires and a gap between the bundle of the core wires and an inner surface of the insulating coating that is the cover material. The water-stopping structure for a wire according to claim 1 or 2, wherein A water-stopping method for a wire, in which a liquid water-stopping material is infiltrated into a gap between a plurality of bundled wires, and the water-stopping material is cured,
As the water-stopping material, a magnetic fluid made of a composite material in which hard ferrite magnetic ultrafine particles are dispersed in a liquid water-stopping agent is used.
The water-stopping material is infiltrated into the gap between the wire rods, and then a magnetic field is applied by a magnet from the outside of the cover material that covers the outer periphery of the bundle of wire rods through which the water-stopping material permeates. By collecting the water material at a predetermined location in the cover material and making the hard ferrite in the water stop material become permanent magnets and adsorbing each other, a wall of the water stop material filling the gap between the wires is formed, A method for water-stopping a wire, wherein the water-stopping material is cured in a state.   Magnetic fluid made of a composite material in which magnetic ultrafine particles of hard ferrite in an unmagnetized state are dispersed in a liquid waterstopper and the surface of each magnetic ultrafine particle is chemically adsorbed as the waterstop material. The method for water-stopping a wire according to claim 5, wherein:   The plurality of wires are wires that form a wire harness, and the water-stopping material is infiltrated into the gaps between the wires, and a magnet is attached from the outside of the sheet that covers the outer periphery of the bundle of wires as the cover material. The method for water-stopping a wire according to claim 5 or 6, wherein a magnetic field is applied to collect the water-stopping material at the predetermined location.   The plurality of wires are core wires forming a covered electric wire, and the water stop material is infiltrated into a gap between the core wires and a gap between the bundle of the core wires and the inner surface of the insulating coating that is the cover material. The method for water-stopping a wire according to claim 5 or 6, wherein a magnetic field is applied by a magnet from the outside of the insulating coating to collect the water-stopping material at the predetermined location.

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