JP4918248B2 - Line water-stop method, line water-stop device, and wire harness - Google Patents

Description

  The present invention relates to a line water stop method, a line water stop device, and a wire harness used for water stop between core wires of a covered wire of a wire harness (in addition, “water stop” in the description of the present invention is It means not only preventing water intrusion but also effectively working on all liquids including water, oil, alcohol, etc. To explain).

  As an example of a conventional line water-stop method, the water-stopping material is allowed to permeate inside the insulating coating by sucking air (ie, air) and reducing the pressure during or after the water-stopping material is supplied. It is known (see Patent Document 1).

  As shown in FIG. 4, a covered electric wire (ground electric wire) 51 used in the line water stopping method disclosed in Patent Document 1 has an insulating coating (covering material) 54 around a core wire (conductor) 53. Then, a terminal (ground connection terminal) 52 is crimped (that is, crimped) to one of the terminal portions.

  The crimping of the terminal 52 to the covered electric wire 51 is performed by opening the pair of barrels 55 of the terminal 52 and removing the insulating coating 54 and exposing the end portion of the covered electric wire 51 between the barrels 55 of the terminal 52. Then, the barrel 55 is crimped and closed, whereby the core wire 53 and the insulation coating 54 are crimped and fixed to the terminal 52.

  In the inter-line water-stopping method used for water-stopping between the core wires 53 of the covered electric wire 51 with the terminal 52, the air (air) inside the insulating coating 54 is supplied from the other end of the covered electric wire 51. While the decompression step of sucking is being performed, a water-stopping material having fluidity is supplied to one end portion of the covered electric wire 51 in the arrow direction 60 so that the water-stopping material permeates the inside of the insulating coating 54. .

The above-mentioned line water stopping method employs a vacuum pressure reducing method in which the pressure is reduced by air suction, so that a pressure difference of at least atmospheric pressure (1 kgf / cm ² ) cannot be obtained at the maximum. For this reason, there is a limit to infiltrate the water-stopping material due to a decrease in the gap between the core wires accompanying reduction in diameter or weight of the covered electric wire.

  In addition, it is difficult to reduce the volume of the water stop material that permeates between the core wires.

  Also, in one of the terminal portions of the plurality of covered wires and the intermediate joint portion to which the core wires of the plurality of covered wires are connected together, air inside the plurality of insulating coatings is sucked from the other of the plurality of terminal portions. Therefore, not only a large work space is required but also a large capital investment is required.

JP 2004-355851 A

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the line water-stopping method and line water-stop device which can solve the said problem, and the said line water-stop method or It is providing the wire harness provided with the electric wire which water-stopped between the core wires by the said line water stop apparatus.

In order to achieve the above-described object, the line water stopping method according to the present invention is characterized by the following (1) to ( 3 ).
(1) A line water-stop method for infiltrating a water-stop material between a plurality of core wires of at least one covered electric wire,
A water stop preparation step for providing a pressurized chamber that houses and seals a part of the covered electric wire including the exposed portion of the core wire partially exposed from the insulating coating of the covered electric wire;
The pressurized gas is sent from the outside of the pressurizing chamber into the pressurizing chamber so that a pressure difference occurs between the pressurizing chamber and the outside of the pressurizing chamber, and the pressurized gas is passed through the insulating coating to pressurize the coated electric wire. A gas sending and discharging step for discharging from a portion located outside the room;
A water-stop material placement step of placing the water-stop material made of a hot melt material on the exposed portion of the core wire; and
A melting step for melting the waterstop material;
Including
After performing the water blocking material placement step, the melting step is performed in a state in which the pressure difference is generated between the pressurizing chamber and the pressurizing chamber by the gas feeding / exhausting step, and is fixed in the pressurizing chamber. wherein on the exposed portion of the core wire of the covered wire by melting the hot-melt material, forcibly Ru that infiltrated the hot melt material between the core wire was.
(2) A line waterproofing method in which a waterproof material is infiltrated between a plurality of core wires of at least one covered electric wire,
A water stop preparation step for providing a pressurized chamber that houses and seals a part of the covered electric wire including the exposed portion of the core wire partially exposed from the insulating coating of the covered electric wire ;
The pressurized gas is sent from the outside of the pressurizing chamber into the pressurizing chamber so that a pressure difference occurs between the pressurizing chamber and the outside of the pressurizing chamber, and the pressurized gas is passed through the insulating coating to pressurize the coated electric wire. A gas sending and discharging step for discharging from a portion located outside the room;
A water-stop material placement step of placing the water-stop material made of a hot melt material on the exposed portion of the core wire; and
A melting step for melting the waterstop material;
Including
Performing the melting step after performing the water blocking material placement step, and performing the gas feeding and discharging step in a state where the hot melt material on the exposed portion of the core wire of the covered electric wire fixed in the pressurizing chamber is melted. Causing the pressure difference between the pressurizing chamber and the pressurizing chamber to forcibly infiltrate the hot melt material between the core wires.
( 3 ) It is the line water stop method of said (1) or ( 2 ),
Before the covered electric wire is accommodated in the pressurizing chamber and sealed in the water stop preparation step, a terminal is crimped to the exposed portion of the core wire.

Since the above-mentioned (1) and (2) line water stopping methods are not a vacuum pressure reduction method but a gas pressurization method, a large pressure difference can be obtained inside and outside the pressurizing chamber. Therefore, according to the water-stopping method between the lines (1) and (2) , the water-stopping material can be reliably infiltrated into a small gap between the core wires. Further, according to the above-described line-stopping methods (1) and (2) , the water-stopping material is permeated into the gap between the core wires even if the water-stopping material has low fluidity (that is, high viscosity). Can do. Moreover, according to the above-mentioned (1) and (2) line-water-stopping methods, it is easy to reduce the volume of the water-stopping material that permeates between the core wires. Therefore, according to the line water stopping methods of the above (1) and (2) , it is easy to cope with a reduction in the diameter and weight of the covered electric wire. In addition, according to the above-described water stopping methods of (1) and (2) , even if the terminal portion or the intermediate joint portion is a set of core wires of a plurality of covered electric wires that are connected together, Since the water-stopping material can be infiltrated into the gaps between them, workability is also good. In addition, the water stopping method of the above (1) and (2) does not require a large vacuum generating facility such as a vacuum pump, and an air injection supply device usually provided in a general factory is used. Since it can be used as a device for sending pressurized gas from the outside of the pressurizing chamber into the pressurizing chamber, a large work space is not required, and capital investment can be reduced.
In addition, according to the above-described water stopping method of (1) and (2) , the hot melt material can be surely permeated into a small gap between the core wires by melting the hot melt material at the exposed portion of the core wire. Can do. That is, the hot melt material is easy to store because the initial state is a solid state or a semi-solid state, and further, troubles such as clogging of a supply mechanism such as a nozzle are not caused. Thus, by using a hot melt material as a water-stopping material, it is possible to facilitate handling of materials and processing operations in the process. Examples of the heating means for melting the hot melt material include a light beam generator, a laser beam generator, a hot air supply device, and a heater.
In addition, according to the above-mentioned ( 3 ) line-water-stopping method, the water-stopping material can be reliably infiltrated into a small gap between the core wires to which the terminals are crimped.

Moreover, in order to achieve the objective mentioned above, the line water stop apparatus which concerns on this invention is characterized by the following ( 4 )-( 5 ).
( 4 ) A line water stop device that forcibly penetrates a water stop material between a plurality of core wires of at least one covered electric wire,
A pressurizing chamber that houses and seals a portion of the coated wire including an exposed portion of the core wire that is partially exposed from the insulating coating of the coated wire;
A pressurizing means connected to the pressurizing chamber and sending pressurized gas from outside the pressurizing chamber to the pressurizing chamber so that a pressure difference is generated between the pressurizing chamber and the pressurizing chamber;
A heating means for melting the waterstop material comprising a hot melt material ;
With
The hot melt material, which is disposed in the exposed portion of the core wire and melted by the heating device, is fed into the pressurizing chamber by the pressurizing unit so that the hot melt material penetrates between the exposed portion of the core wire and the core wire. the pressurized gas is the fact that will be discharged from said portion located outside the pressure chamber of the covered wire through the said insulating coating was.
( 5 ) A line water-stop device having the configuration of ( 4 ) above,
The terminal is crimped to the exposed portion of the core wire.

The line water stop device having the above configuration ( 4 ) is a device that employs a gas pressurization method instead of a vacuum depressurization method, so that a large pressure difference can be obtained inside and outside the pressurization chamber. Therefore, according to the line waterstop device having the above configuration ( 4 ), the waterstop material can be reliably infiltrated into a small gap between the core wires. In addition, according to the line waterstop device having the above configuration ( 4 ), the waterstop material can be permeated into the gap between the core wires even if the waterstop material has low fluidity (that is, high viscosity). . Moreover, according to the line water stop apparatus of the said ( 4 ) structure, it is easy to aim at volume reduction of the water stop material osmose | permeated between core wires. Therefore, according to the line water stop device having the above configuration ( 4 ), it is easy to cope with a reduction in the diameter and weight of the covered electric wire. Moreover, according to the line | wire waterproofing apparatus of the said ( 4 ) structure, even if it is the terminal part and intermediate | middle joint part which the core wires of the some covered electric wire gathered and connected, it pressurizes at once and between core wires Workability is also good because the water-stopping material can penetrate into the gap. In addition, the line water stop device having the above configuration ( 4 ) does not require a large vacuum generating facility such as a vacuum pump, and pressurizes an air injection supply device usually provided in a general factory. Since it can be used as a device for sending pressurized gas from the outside into the pressurized chamber, a large work space is not required and the capital investment is small.
Moreover, according to the line | wire water stop apparatus of the said ( 4 ) structure, a hot-melt material can be osmose | permeated reliably also to the small clearance gap between core wires by melting a hot-melt material in the exposed part of a core wire. . That is, the hot melt material is easy to store because the initial state is a solid state or a semi-solid state, and further, troubles such as clogging of a supply mechanism such as a nozzle are not caused. Thus, by using a hot melt material as a water-stopping material, it is possible to facilitate handling of materials and processing operations in the process. Examples of the heating means for melting the hot melt material include a light beam generator, a laser beam generator, a hot air supply device, and a heater.
Moreover, according to the line | wire water stop apparatus of the said ( 5 ) structure, a water stop material can be osmose | permeated reliably also to the small clearance gap between the core wires by which the terminal was crimped | bonded.

In order to achieve the above-described object, the wire harness according to the present invention is characterized by the following ( 6 ) and ( 7 ).
( 6 ) at least one covered electric wire having an insulating coating formed along the periphery of a plurality of core wires and a bundle of the core wires;
A hot melt material that has penetrated between the core wires from the exposed portion of the core wire partially exposed from the insulating coating to the inside of the insulating coating;
Wire harness with
( 7 ) A wire harness configured as described in ( 6 ) above,
A terminal crimped to the exposed portion of the core wire;

The wire harness having the above configuration ( 6 ) has good water stopping performance because the hot melt material surely penetrates into the small gaps between the core wires. That is, the hot melt material is easy to store because the initial state is a solid state or a semi-solid state, and further, troubles such as clogging of a supply mechanism such as a nozzle are not caused. Thus, by using a hot melt material as a water-stopping material, it is possible to facilitate handling of materials and processing operations in the process. In addition, since the water harness having a relatively high viscosity can be used for the wire harness having the configuration ( 6 ) as described above, a wide variety of water stop materials can be used.
According to the wire harness having the above configuration ( 7 ), the water-stopping material surely penetrates even in a small gap between the core wires to which the terminals are crimped, and thus the water-stopping performance is good.

According to the line water-stop method and the line water-stop device of the present invention, (I) there is a limit to infiltrate the water-stopping material by reducing the gap between the core wires accompanying the reduction in the diameter or weight of the covered electric wire. There is (II) not only a large work space is required for sucking air inside the plurality of insulation coatings from the other end of the plurality of terminal portions, but also a large work space is involved, and (III) It is possible to solve the conventional problems such as difficulty in reducing the volume of the water-stopping material to be infiltrated between the core wires, that is, (i) the water-stopping material can be reliably infiltrated into a small gap between the core wires. ) Use of an air injection supply device that is usually provided in a general factory as a device for sending pressurized gas from the outside of the pressurizing chamber into the pressurizing chamber without requiring a large vacuum generating facility such as a vacuum pump. Yes, (iii) minimum necessary stop It is possible reliable waterproofing in wood, thus attained also save space when mounted on a vehicle, a marked effect such like.
In addition, according to the wire harness of the present invention, since a relatively high-viscosity type water-stopping material can be used, there are remarkable effects such that a wide variety of water-stopping materials can be used.

  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 EMBODIMENTS Hereinafter, preferred embodiments and reference examples according to the present invention will be described in detail with reference to the drawings.

  Here, one covered electric wire having an insulation coating formed around the periphery of a plurality of core wires and a bundle of the core wires, and a terminal crimped to an exposed portion of the bundle of core wires exposed at one end of the covered electric wire An example of a wire harness provided with a wire waterproofing device and a wire of the present invention for forcibly penetrating a water blocking material between the core wires from the exposed portion of the bundle of core wires to the inside of the insulation coating Explain how to stop water.

Figure 1 is a sectional view showing a cross-sectional view, and FIG. 2 is a schematic structural embodiment of the linear water stopping apparatus according to the present invention showing a schematic configuration of Senkantome water device of the reference example.

( Reference example )
First, it will be described with reference to FIG. 1 a Senkantome water device of the reference example. As shown in FIG. 1, the line water stop device 10 is a line water stop device that forcibly penetrates a water stop material 80 between a plurality of core wires 75 of one covered electric wire 72. A terminal 71 is crimped to the exposed portion of the core wire 75.

  The line waterproof device 10 accommodates and seals a part of the covered electric wire 72 including the exposed portion of the core wire 75 partially exposed from the insulating coating 74 of the covered electric wire 72, and the pressurizing chamber 11. An air delivery device 12 for sending pressurized gas from the outside of the pressurizing chamber 11 into the pressurizing chamber 11 so that a pressure difference is generated between the inside of the pressurizing chamber 11 and the outside of the pressurizing chamber 11; A water-stopping material dropping device 13 for dropping and arranging a water-stopping material 80 (a liquid water-stopping material 80 or a solid water-stopping water-proofing material 80) provided on the exposed portion. And an exhaust means 14.

  In this inter-line water-stop device 10, the air-feeding device 12 enters the pressurizing chamber 11 so that the water-stopping material 80 disposed in the exposed portion of the core wire 75 penetrates between the exposed portion of the core wire 75 and the core wire 75. The supplied pressurized gas is discharged from the portion of the covered electric wire 72 located outside the pressurizing chamber 11 through the insulating coating 74.

  The exhaust means 14 connected to the pressurizing chamber 11 has an exhaust passage 21 with an on-off valve 20 for lowering the pressure inside the pressurizing chamber 11 whose pressure is higher than that outside the pressurizing chamber 11. The pressure chamber 11 is depressurized by opening the on-off valve 20 of the exhaust passage 21.

  The wire harness 70 encloses the core wire 75 exposed by removing the insulating coating 74 at one end of the covered electric wire 72 and the end of the insulating coating 74, and adds the expanded state of the terminal 71 having a rectangular grounding portion 76. The fastening portion 73 is crimped, whereby the core wire 75 is electrically connected and fixed to the terminal 71, and the insulating coating 74 is fixed to the terminal 71 and includes the covered electric wire 72 with the terminal 71.

  Hereinafter, the detail of the line water stop apparatus 10 comprised in this way is demonstrated.

  The pressurizing chamber 11 includes a pressurizing chamber main body 15 having an upper opening and a pressurizing chamber cover 16. The pressurizing chamber cover 16 is attached to the pressurizing chamber main body 15 so as to cover the opening, and seals the inside of the pressurizing chamber 11.

  The pressurizing chamber body 15 includes an airtight seal member 17 having a hole communicating with the outside of the pressurizing chamber 11. The hermetic seal member 17 holds the outer peripheral surface of the insulating coating 74 of the covered electric wire 72 in an airtight manner so that the covered electric wire 72 is inserted and the air tightness inside the pressurizing chamber 11 is maintained. When handling a terminal portion or an intermediate joint portion in which the core wires 75 of the plurality of covered electric wires 72 are connected together, the hermetic seal member 17 having such a hole communicating with the outside of the pressurizing chamber 11 is used as the pressurizing chamber 11. A plurality of them may be provided. Alternatively, a means such as providing a plurality of holes communicating with the outside of the pressurizing chamber 11 so that a plurality of covered electric wires 72 arranged in parallel can be inserted into one hermetic seal member 17 may be adopted.

  The air delivery device 12 is, for example, an air (air) injection supply device usually provided in a general factory, and an air supply pipe 18 is connected in communication with the inside of the pressurizing chamber 11. The air delivery device 12 is driven in a sealed state in which the pressurizing chamber cover 16 is attached to the pressurizing chamber main body 15, and thereby air having a predetermined pressure (that is, pressurized gas) is passed through the air supply pipe 18. A large pressure difference is generated with respect to the outside of the pressurizing chamber 11 by being introduced into the pressurizing chamber 11.

  The water stop dripping means 13 has a water stop material feeding pipe 19 that penetrates the pressurization chamber cover 16 and opens inside the pressurization chamber 11, and the water stop material 80 stored inside is driven by driving. A predetermined amount is dropped onto the exposed portion of the core wire 75 and the crimping portion 73 of the terminal 71.

  The exhaust means 14 incorporates an opening / closing valve 20 in the exhaust passage 21, and the exhaust passage 21 communicates with the pressurizing chamber body 15 and opens in the pressurizing chamber 11. The on-off valve 20 of the exhaust means 14 is closed when the permeation process of the water stop material 80 is started, and is opened when the permeation process of the water stop material 80 is completed.

  It is preferable that the water stop material 80 has a certain degree of fluidity and viscosity at the time of permeation treatment into the covered electric wire 72, and the property does not change with the lapse of time after curing after the permeation and the viscosity is increased. Specifically, silicone resin, silicone rubber, grease, butyl rubber, epoxy resin, acrylic resin, thermoplastic resin, and other adhesives having viscosity and elasticity are suitable as the water stop material 80.

  Next, a line water stopping method using such a line water stopping device 10 will be described.

  First, the other end portion of the covered wire 72 in which the terminal 71 is already connected to one end portion is inserted into the hole of the hermetic seal member 17 from the inside of the pressurizing chamber main body 15 to pressurize the other end portion side portion of the covered wire 72. Pull out to the outside of the chamber 11. A portion of the covered wire 72 that is partially exposed from the insulating coating 74 and that includes the exposed portion of the core wire 75 to which the terminal 71 is crimped is housed in the pressurizing chamber 11 of the covered wire 72. And fixed at a predetermined position. In this state, the air delivery device 12 is not driven, the on-off valve 20 of the exhaust means 14 is opened, and the water stop material dropping device 13 is not driven. Then, the pressurizing chamber cover 16 is attached to the pressurizing chamber main body 15 so as to cover the opening, the opening / closing valve 20 is closed, and one end of the covered electric wire 72 connected to the terminal 71 is in the pressurizing chamber 11. Sealed with.

  Next, when the air delivery device 12 is driven, pressurized gas is sent from the outside of the pressurizing chamber 11 into the pressurizing chamber 11 so that a pressure difference is generated between the inside of the pressurizing chamber 11 and the outside of the pressurizing chamber 11. In addition, a gas feeding and discharging step is performed in which the pressurized gas is discharged from the other end side portion of the covered electric wire 72 located outside the pressurizing chamber 11 through the insulating coating 74. In the state where a pressure difference is generated between the inside of the pressurizing chamber 11 and the outside of the pressurizing chamber 11 by this gas feeding / discharging step, a water blocking material is applied to an exposed portion of the core wire 75 of the covered electric wire 72 fixed inside the pressurizing chamber 11. A water-stopping material placement step of dropping a predetermined amount of the water-stopping material 80 from the dropping device 13 is executed. Alternatively, the air delivery device 12 is driven after the water-stopping material placement step of dropping the water-stopping material 80 from the water-stopping material dropping device 13 onto the exposed portion of the core wire 75 of the covered electric wire 72 fixed in the pressurizing chamber 11. Thus, a pressure difference may be generated between the pressurizing chamber 11 and the pressurizing chamber 11. In any case, the water blocking material 80 is forcibly penetrated between the core wires 75 from the exposed portion of the core wire 75 to the end of the insulating coating 74 in the arrow direction shown in FIG. Further, depending on the dropping position of the water-stopping material 80, the water-stopping material 80 penetrates between the core wires 75 in the caulking portion 73. Immediately after execution of the water-stop material placement step, the drive of the water-stop material dropping device 13 is stopped.

  Thus, when the permeation treatment of the water stop material 80 is completed, the on-off valve 20 of the exhaust passage 21 for lowering the pressure inside the pressurizing chamber 11 whose pressure is higher than the outside of the pressurizing chamber 11 is opened. The air in the pressurizing chamber 11 is discharged to reduce the pressure. When the air is sufficiently discharged, the pressurizing chamber cover 16 is opened. Then, when the water stop material 80 is hardened after a predetermined time has passed, if the wire harness 70 is taken out from the pressurizing chamber 11, the permeation treatment of the water stop material 80 into the wire harness 70 is completed. Even if the water-stopping material 80 that has penetrated between the core wires 75 does not harden, the capillarity prevents the water-stopping material 80 from flowing out, so that the wire harness 70 in a state where the water-stopping material 80 is not hardened is added. Even if it is taken out from the pressure chamber 11, there is no problem.

( Embodiment )
Next, an embodiment of the present invention will be described with reference to FIG. In the description of FIG. 2 , components having the same configuration / action as those already described are denoted by the same reference numerals or equivalent reference numerals, and description thereof is omitted or simplified.

As shown in FIG. 2, the line water stop device 40 does not include the water stop material dropping device 13 as compared with the reference example , but instead heats and melts the hot melt material 81 to make it liquid. And a water-stopping material dropping device 42 for applying a hot melt material 81 that is a water-stopping material.

  The heating device 41 has a communication pipe 43 connected to the pressurizing chamber body 15 and is driven to supply hot air to the crimping portion 73 of the terminal 71 through the communication pipe 43.

  In the water stop material dropping device 42, the nozzle 44 penetrates the pressurizing chamber cover 16 and is opened inside the pressurizing chamber 11, and the hot melt material 81 stored therein is melted by driving, so that the nozzle 44 Then, a predetermined amount is dropped (or applied) onto the exposed portion of the core wire 75 and the crimping portion 73 of the terminal 71.

  Examples of the hot melt material 81 include those in which the initial state is solid or semi-solid, melts by heating, and then cures immediately by being placed at room temperature. The hot melt material 81 does not need to be mixed and can be used after being dissolved in a necessary amount, so there is no loss.

  Next, a line water stopping method using such a line water stopping device 40 will be described.

  First, the other end portion of the covered wire 72 in which the terminal 71 is already connected to one end portion is inserted into the hole of the hermetic seal member 17 from the inside of the pressurizing chamber main body 15 to pressurize the other end portion side portion of the covered wire 72. Pull out to the outside of the chamber 11. A portion of the covered wire 72 that is partially exposed from the insulating coating 74 and that includes the exposed portion of the core wire 75 to which the terminal 71 is crimped is housed in the pressurizing chamber 11 of the covered wire 72. And fixed at a predetermined position. In this state, the air delivery device 12 is not driven, the on-off valve 20 of the exhaust means 14 is opened, the water stop material dropping device 42 is not driven, and the heating device 41 is not driven. . Then, the pressurizing chamber cover 16 is attached to the pressurizing chamber main body 15 so as to cover the opening, the opening / closing valve 20 is closed, and one end of the covered electric wire 72 connected to the terminal 71 is in the pressurizing chamber 11. Sealed with.

  Next, by driving the water stop material dropping device 42, a predetermined amount of hot melt material 81 is applied from the water stop material dropping device 42 to the exposed portion of the core wire 75 of the covered electric wire 72 fixed in the pressurizing chamber 11. A water-stopping material arrangement step for dripping or applying is performed. Immediately after execution of the water blocking material arrangement step, the driving of the water blocking material dropping device 42 is stopped. By driving the heating device 41 in a state in which a pressure difference is generated between the inside of the pressurizing chamber 11 and the outside of the pressurizing chamber 11 by the gas feeding / exhausting step after performing the water stop material arranging step, A melting step of melting the hot melt material 81 on the exposed portion of the core wire 75 of the fixed covered electric wire 72 is executed, whereby the hot melt material 81 is forcibly penetrated between the core wires 75. Alternatively, the hot melt material 81 on the exposed portion of the core wire 75 of the covered electric wire 72 fixed in the pressurizing chamber 11 is melted by driving the heating device 41 after executing the water stop material arranging step. A pressure difference is produced between the inside of the pressurizing chamber 11 and the outside of the pressurizing chamber 11 by the gas feeding / discharging step, whereby the hot melt material 81 is forcibly permeated between the core wires 75. In any case, the hot melt material 81 is forced to penetrate between the core wires 75 from the exposed portion of the core wire 75 to the end of the insulating coating 74. Further, depending on the dropping position (or application position) of the hot melt material 81, the hot melt material 81 penetrates between the core wires 75 in the crimping portion 73. After the elapse of a time period during which it can be determined that the hot melt material 81 has sufficiently penetrated between the core wires 75, the driving of the heating device 41 is automatically stopped.

  When the permeation treatment of the hot melt material 81 is completed in this way, the on-off valve 20 of the exhaust passage 21 for lowering the pressure in the pressurizing chamber 11 whose pressure is higher than that outside the pressurizing chamber 11 is opened. The air in the pressurizing chamber 11 is discharged to reduce the pressure. When the air is sufficiently discharged, the pressurizing chamber cover 16 is opened. Then, when the hot melt material 81 is hardened after a predetermined time has passed, if the wire harness 70 is taken out from the pressurizing chamber 11, the permeation process of the hot melt material 81 into the wire harness 70 is completed.

As described above, the line water-stop devices 10 and 40 are devices that employ a gas pressurization method instead of a vacuum depressurization method, so that a large pressure difference can be obtained inside and outside the pressurization chamber 11. . Therefore, according to the line water stop devices 10 and 40, the water stop materials 80 and 81 can be reliably infiltrated into a small gap between the core wires 75. Further, according to the line waterstop devices 10 and 40, the waterstop materials 80 and 81 are permeated into the gaps between the core wires 75 even if the waterstop materials 80 and 81 have low fluidity (that is, high viscosity). be able to. Moreover, according to the line water stop apparatus 10 and 40, it is easy to aim at volume reduction of the water stop material 80 and 81 permeated between the core wires 75. Therefore, according to the line water stop devices 10 and 40, it is easy to cope with the reduction in diameter and weight of the covered electric wire 72. Moreover, according to the line | wire waterproofing apparatuses 10 and 40, even if it is the terminal part and intermediate | middle joint part which the core wire 75 of the some covered electric wire 72 gathered and connected, it pressurizes at once and the clearance gap between the core wires 75 Since the water-stopping materials 80 and 81 can be infiltrated, workability is also good. In addition, the line water stop devices 10 and 40 do not require a large vacuum generating facility such as a vacuum pump, and an air (air) injection supply device that is usually provided in a general factory is provided from outside the pressurizing chamber 11. Since it can be used as a device for sending pressurized gas into the pressurizing chamber 11, a large work space is not required and capital investment can be reduced.
Further, according to the line water stop devices 10 and 40, it is not necessary to drop the water stop materials 80 and 81 on the exposed portion of the core wire 75 before accommodating a part of the covered electric wire 72 in the pressurizing chamber 11. Easy to work.
Further, according to the line water blocking device 40, the hot melt material 81 can be reliably permeated into a small gap between the core wires 75 by melting the hot melt material 81 at the exposed portion of the core wire 75. That is, the hot melt material 81 is easily stored because the initial state is a solid state or a semi-solid state, and further, troubles such as clogging of a supply mechanism such as a nozzle are not caused. In this way, by using the hot melt material 81 as a water-stopping material, it is possible to facilitate handling of materials and processing operations in the process. Therefore, since the hot melt material 81 has surely penetrated into the small gap between the core wires 75, the wire harness 70 has good water stopping performance. Thus, since the water harness 70 of a type with a comparatively high viscosity can be used for the wire harness 70, a wide variety of water sealants can be used. Examples of the heating device 41 that melts the hot melt material 81 include a light beam generation device, a laser beam generation device, a hot air supply device, and a heater.
Moreover, according to the line | wire water stop apparatus 10 and 40, the water stop material 80 and 81 can be made to osmose | permeate reliably also to the small clearance gap between the core wires 75 to which the terminal 71 was crimped | bonded.
Further, according to the line water-stop devices 10 and 40, the opening and closing valve 20 of the exhaust passage 21 is opened to decompress the inside of the pressurizing chamber 11 before the pressurizing chamber cover 16 of the pressurizing chamber 11 is opened. By opening the passage 21 and reducing the pressure in the pressurizing chamber 11, it is possible to ensure safety when the covered electric wire 72 that has finished the permeation treatment of the water blocking materials 80 and 81 is taken out.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, 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.

(Modification)
Here, with reference to FIG. 3, the modification of the line water stop apparatus of a reference example is demonstrated. In the description of FIG. 3 and the following modified examples, components having the same configurations and functions as those described above are denoted by the same or corresponding symbols, and description thereof is omitted or simplified.

  As shown in FIG. 3, the line waterstop device 100 is a line waterstop device that forcibly permeates the waterstop material 80 between the plurality of core wires 75 of the two covered electric wires 72 and 72 a. . In addition, the water stop apparatus 100 between lines forcibly penetrates the water stop material 80 between the core wires 75 of the covered electric wire 72 or the covered electric wire 72a (that is, one of the covered electric wire 72 and the covered electric wire 72a is inserted). No) may be a line water stop device.

  One of the two covered electric wires 72, 72a has an insulating coating 74 formed along the periphery of a plurality of core wires 75 and a bundle of the core wires 75, like the covered electric wires in the above-described embodiment. The exposed portion of the bundle of the core wires 75 exposed by removing the insulating coating 74 is provided at one end thereof. However, the terminal is not crimped to the exposed portion of the core wire 75.

  Of the two covered electric wires 72, 72 a, the other covered electric wire 72 a is also a covered electric wire having a plurality of core wires 75 and an insulating coating 74 a formed along the periphery of the bundle of the core wires 75. is there. However, the exposed portion of the bundle of core wires 75 like the covered electric wire 72 is not provided at one end of the covered electric wire 72a. In addition, since the end surface of the bundle | flux of the core wire 75 is exposed from the opening of the insulation coating 74a in the end surface of the covered electric wire 72a, it cannot be overemphasized that the covered portion of the bundle of the core wire 75 also exists in the covered electric wire 72a. .

  The line water stop device 100 is connected to the pressurizing chamber 111 and the pressurizing chamber 111 for accommodating and sealing the portions of the covered electric wires 72 and 72a including the exposed portions of the core wires 75 of the respective covered electric wires 72 and 72a. In addition, an air delivery device 12 that sends pressurized gas from the outside of the pressurizing chamber 111 into the pressurizing chamber 111 so that a pressure difference is generated between the inside of the pressurizing chamber 111 and the outside of the pressurizing chamber 111; The bottomed cylindrical container 90 and the exhaust means 14 are provided. The container 90 stores a water stop material 80 in which at least an exposed portion of the core wire 75 of each of the covered electric wires 72 and 72a is immersed.

  In this line water stop device 100, the pressurized gas sent into the pressure chamber 111 by the air delivery device 12 is insulated so that the water stop material 80 penetrates between the exposed portion of the core wire 75 and between the core wires 75. Through the inside of 74, 74a, it discharges | emits from the part located outside the pressurization chamber 111 of the covered electric wires 72, 72a.

  The exhaust means 14 connected to the pressurizing chamber 111 has an exhaust passage 21 with an on-off valve 20 for lowering the pressure in the pressurizing chamber 111 whose pressure is higher than that outside the pressurizing chamber 111. The pressure chamber 111 is depressurized by opening the on-off valve 20 of the exhaust passage 21.

  Hereinafter, the detail of the line water stop apparatus 100 comprised in this way is demonstrated.

  The pressurizing chamber 111 includes a pressurizing chamber main body 115 having an upper opening and a pressurizing chamber cover 116. The pressurizing chamber cover 116 is attached to the pressurizing chamber main body 115 so as to cover the opening, and seals the inside of the pressurizing chamber 111.

  The pressurizing chamber cover 116 includes an airtight seal member 117 having a hole communicating with the outside of the pressurizing chamber 111. The hermetic seal member 117 holds the outer peripheral surfaces of the insulating coatings 74 and 74 a of the covered electric wires 72 and 72 a so that the covered electric wires 72 and 72 a are inserted therethrough and the air tightness inside the pressurizing chamber 111 is maintained.

  When handling a terminal portion or an intermediate joint portion in which the core wires 75 of the plurality of covered electric wires 72 are connected together, or a bundle of the plurality of covered electric wires 72a, a hole communicating with the outside of the pressurizing chamber 111 is provided. A plurality of hermetic seal members 117 may be provided in the pressurizing chamber 111. Alternatively, a means such as providing a plurality of holes communicating with the outside of the pressurizing chamber 111 so that the plurality of covered electric wires 72 and 72a arranged in parallel can be inserted into one hermetic seal member 117 may be adopted.

  Although the part accommodated in the pressurization chamber 111 of the covered electric wires 72 and 72a including the exposed part of the core wire 75 hangs down from the airtight seal member 117 as shown in FIG. 3, it is not shown if necessary. It is fixed by an appropriate fixing member and positioned at a predetermined position.

  Next, a line water stopping method using such a line water stopping device 100 will be described.

  First, the pressurizing chamber cover 116 is attached to the pressurizing chamber main body 115 so as to cover the opening thereof with the covered electric wires 72 and 72a inserted into the holes of the hermetic seal member 117 (in this case, each of the covered electric wires 72 and 72a is covered). One end is immersed in the water stop material 80, and the other end side portion of the covered electric wires 72 and 72a is extended to the outside of the pressurizing chamber 111).

  In this state, the air delivery device 12 is not driven, and the on-off valve 20 of the exhaust means 14 is opened. Then, the on-off valve 20 is closed, and one end of each of the covered electric wires 72 and 72 a is sealed in the pressurizing chamber 111.

  Next, when the air delivery device 12 is driven, pressurized gas is sent from the outside of the pressurizing chamber 111 into the pressurizing chamber 111 so that a pressure difference is generated between the inside of the pressurizing chamber 111 and the outside of the pressurizing chamber 111. In addition, a gas feed / discharge step is performed in which the pressurized gas is discharged from the other end side portion of the covered wires 72, 72a located outside the pressurizing chamber 111 through the insulating coatings 74, 74a. When a pressure difference is generated between the inside of the pressurizing chamber 111 and the outside of the pressurizing chamber 111 by this gas delivery / discharge step, the water stop material 80 is forced to reach the end portions of the insulating coatings 74 and 74a from the exposed portion of the core wire 75. A predetermined amount is infiltrated between the core wires 75. Before the pressure difference is generated between the inside of the pressurizing chamber 111 and the outside of the pressurizing chamber 111, one end of each of the covered electric wires 72 and 72a is not immersed in the water stop material 80, and the pressure difference is generated and then covered. One end of each of the electric wires 72 and 72a may be immersed in the water stop material 80.

  When the permeation treatment of the water blocking material 80 is completed in this way, the on-off valve 20 of the exhaust passage 21 for lowering the pressure in the pressurizing chamber 111 whose pressure is higher than that outside the pressurizing chamber 111 is opened. The air in the pressurizing chamber 111 is discharged to reduce the pressure. When the air is sufficiently discharged, the pressurizing chamber cover 116 is opened.

  Then, when the water-stopping material 80 that has penetrated between the core wires 75 is cured after a predetermined time has passed, if the covered electric wires 72 and 72a are taken out from the pressurizing chamber 111, the infiltration treatment of the water-stopping material 80 into the covered electric wires 72 and 72a is performed. It is complete. Even if the water-stopping material 80 that has penetrated between the core wires 75 does not harden, the capillarity prevents the water-stopping material 80 from flowing out, so that the covered electric wires 72 and 72a in a state where the water-stopping material 80 is not hardened. May be removed from the pressurizing chamber 111.

It is sectional drawing which shows schematic structure of the line water stop apparatus of a reference example . It is sectional drawing which shows schematic structure of embodiment of the line water stop apparatus which concerns on this invention. It is sectional drawing which shows schematic structure of the line water stop apparatus of a modification . It is a figure for demonstrating the conventional line water stop method.

Explanation of symbols

10, 40 Line water stop device 11 Pressurizing chamber 12 Air delivery device (pressurizing means)
13 Water-stopping material dropping device (water-stopping material dropping means)
DESCRIPTION OF SYMBOLS 14 Exhaust means 15 Pressurization chamber main body 18 Air supply pipe 20 On-off valve 21 Exhaust path 41 Heating device (heating means)
70 Wire harness (coated wire with terminal)
71 Terminal 72 Covered wire 73 Clamping portion 74 Insulation coating 75 Core wire 80 Water stop material 81 Hot melt material

Claims (7)

A line water-stop method for infiltrating a water-stop material between a plurality of core wires of at least one covered electric wire,
A water stop preparation step for providing a pressurized chamber that houses and seals a part of the covered electric wire including the exposed portion of the core wire partially exposed from the insulating coating of the covered electric wire;
The pressurized gas is sent from the outside of the pressurizing chamber into the pressurizing chamber so that a pressure difference occurs between the pressurizing chamber and the outside of the pressurizing chamber, and the pressurized gas is passed through the insulating coating to pressurize the coated electric wire. A gas sending and discharging step for discharging from a portion located outside the room;
A water-stop material placement step of placing the water-stop material made of a hot melt material on the exposed portion of the core wire; and
A melting step for melting the waterstop material;
Including
After performing the water blocking material placement step, the melting step is performed in a state in which the pressure difference is generated between the pressurizing chamber and the pressurizing chamber by the gas feeding / exhausting step, and is fixed in the pressurizing chamber. wherein on the exposed portion of the core wire of the covered wire by melting the hot-melt material, the line between the water stopping method characterized by the hot melt material Ru forcibly penetrate between the core wire was. A line water-stop method for infiltrating a water-stop material between a plurality of core wires of at least one covered electric wire,
A water stop preparation step for providing a pressurized chamber that houses and seals a part of the covered electric wire including the exposed portion of the core wire partially exposed from the insulating coating of the covered electric wire ;
The pressurized gas is sent from the outside of the pressurizing chamber into the pressurizing chamber so that a pressure difference occurs between the pressurizing chamber and the outside of the pressurizing chamber, and the pressurized gas is passed through the insulating coating to pressurize the coated electric wire. A gas sending and discharging step for discharging from a portion located outside the room;
A water-stop material placement step of placing the water-stop material made of a hot melt material on the exposed portion of the core wire; and
A melting step for melting the waterstop material;
Including
Performing the melting step after performing the water blocking material placement step, and performing the gas feeding and discharging step in a state where the hot melt material on the exposed portion of the core wire of the covered electric wire fixed in the pressurizing chamber is melted. A line sealing method, wherein the pressure difference is generated between the pressurizing chamber and the pressurizing chamber, and the hot melt material is forcibly permeated between the core wires. 3. The terminal according to claim 1, wherein a terminal is crimped to an exposed portion of the core wire before the covered electric wire is accommodated in the pressurizing chamber and sealed in the water stop preparation step. Line water stop method. A line waterstop device that forcibly penetrates a waterstop material between a plurality of core wires of at least one covered electric wire,
A pressurizing chamber that houses and seals a portion of the coated wire including an exposed portion of the core wire that is partially exposed from the insulating coating of the coated wire;
A pressurizing means connected to the pressurizing chamber and sending pressurized gas from outside the pressurizing chamber to the pressurizing chamber so that a pressure difference is generated between the pressurizing chamber and the pressurizing chamber;
A heating means for melting the waterstop material comprising a hot melt material ;
With
The hot melt material, which is disposed in the exposed portion of the core wire and melted by the heating device, is fed into the pressurizing chamber by the pressurizing unit so that the hot melt material penetrates between the exposed portion of the core wire and the core wire. the pressurized gas is the insulation line water stopping device, characterized in that that will be discharged from the portion positioned in the pressure chamber outside the covered wire through the coating was. The line water stop device according to claim 4 , wherein a terminal is crimped to an exposed portion of the core wire. At least one covered electric wire having a plurality of core wires and an insulation coating formed along the periphery of the bundle of the core wires;
A hot melt material that has penetrated between the core wires from the exposed portion of the core wire partially exposed from the insulating coating to the inside of the insulating coating;
A wire harness comprising: The wire harness according to claim 6 , further comprising a terminal crimped to an exposed portion of the core wire.

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