JP6443248B2 - Water stop device for wire harness and water stop structure provided with the water stop device - Google Patents

Description

  The present invention relates to a water stop device for a wire harness and a water stop structure provided with the water stop device, and in particular, a plurality of shield wire drain wires connected to an ECU (electronic control unit) mounted on a vehicle and a covered electric wire, In a circuit for connecting a ground wire spliced to the ground circuit in the ECU, the splice portion is preferably used when the splice portion is stopped to prevent water from entering the ECU from the ground wire. is there.

  Recently, the number of ECUs mounted on a vehicle has increased, and a shielded wire is often used to transmit a control signal from the ECU to an auxiliary device such as a drive device. In this case, as shown in FIG. 8, the ECU 100 and the auxiliary machine 102 are connected by a wire harness including a plurality of shield wires 105 (105A, 105B, to 105n). Each shield wire 105 peels off the sheath 106 at the connection terminal between the ECU 100 and the auxiliary machine 102 to expose the core wire (covered electric wire) 108 and the drain wire 109, and the terminal T connected to the terminal of the core wire 108 is connected to the ECU 100 and the auxiliary device 102. It is connected to the connector of the machine 102. On the other hand, the drain wire 109 which is a bare wire not covered with the plurality of shield wires 105 and the core wire 113 on one end side of the general covered electric wire 112 are spliced, and the terminal T connected to the other end of the covered electric wire 112 is connected to the ECU 100. The connector is connected.

  The splice between the drain wire 109 and the core wire 113 of the covered electric wire 112 is performed by crimping or welding using an intermediate crimp terminal, and the splice portion is water-stopped. The water stop of the splice portion is performed by winding a butyl tape and an adhesive tape, or inserting the splice portion into a resin water stop cap, or by resin molding.

As a water stop structure for the splice portion, a waterproof protective cover 300 shown in FIG. 9 is conventionally provided in Japanese Patent Laid-Open No. 11-214053. The waterproof protective cover 300 is not intended to stop water at the splice between the drain wire of the shielded wire and the core wire of the covered electric wire, but is used to stop water at the splice portion between the covered electric wires, and the core wire exposed by peeling the intermediate portion of the covered electric wire 201 The wire connecting portion 203 connecting the wire 201a and the core wire 202a exposed by peeling the terminal end of the covered wire 202 is inserted into the waterproof protective cover 300 to stop water. The waterproof protective cover 300 is provided with an electric wire connecting portion accommodating chamber 303 in the center of the upper and lower cases 301 and 302, and is provided with reservoirs 304 and 305 for small area sealing agents on both sides. The wire connection portion 203 is disposed in the wire connection portion accommodating chamber 303, and the covering portions 201c and 202c of the covered wires 201 and 202 are disposed in the reservoir chambers 304 and 305 on both sides.
The waterproof protective cover 300 is filled with a sealant 330, the wire connection part 203 is waterproofed with the sealant 330 in the wire connection part accommodation chamber 303, and the sealant 330 overflowing from the wire connection part accommodation chamber 303 is stored in the reservoir chambers on both sides. It is set as the structure collected by 304 and 305. FIG.

JP 11-214053 A

In the waterproof protection cover 300, the wire connection portion accommodation chamber 303 needs to be filled with the sealing agent 330 in order to reliably waterproof the wire connection portion 203 disposed in the wire connection portion accommodation chamber 303. Therefore, reservoir chambers 304 and 305 are provided on both sides, and the sealing agent 330 is supplied so as to overflow from the wire connection portion accommodation chamber 303.
In the waterproof protective cover 300 of Patent Document 1, the reservoir chambers 304 and 305 on both sides are smaller in volume than the central electric wire connection portion accommodating chamber 303 serving as a water stop chamber, so that the management of the supply amount of the sealing agent 330 to be filled is severely controlled. There is a problem.

On the other hand, if the reservoir chambers 304 and 305 on both sides are enlarged, the waterproof protective cover 300 itself may be increased in size and may be difficult to arrange in a space. If the sealing agent 330 has a low viscosity, the amount of the sealing agent overflowing into the reservoir chambers 304 and 305 on both sides is not constant, the sealing agent is not filled in the wire connection portion accommodating chamber 303, and the wire connection portion 203 There is a risk that the water will not stop reliably.
Furthermore, when the electric wire to be spliced is a drain electric wire of an earth circuit, the terminal of the electric wire on the ground side is often cut off (cut off) in advance. In this case, it is not necessary to waterproof the cut-off side electric wire. However, in the waterproof protective cover 300, the cut-off side electric wire is also passed through the reservoir chamber.

  The present invention has been made in view of the above problems, and in particular, when the spliced wire is a ground circuit wire, the management accuracy of the sealing agent to be filled does not become severe while reducing the size of the water stop case. It is an object of the present invention to provide a water stop device for a wire harness with good workability and a water stop structure provided with the water stop device.

In order to solve the above-mentioned problems, as a first invention, the main body and a lid are formed, and the inside of the main body is partitioned by a partition wall, and the water stop chamber with a small volume and a water stop agent reservoir chamber having a larger volume than the water stop chamber. The lid is provided with a water-stopping agent injection port for injecting a water-stopping agent into the water-stopping chamber, and an opening for inserting a core wire and water-stopping agent is provided at an intermediate position in the height direction of the partition wall. A wire insertion port is provided on both side walls of the water stop agent reservoir chamber and the water stop chamber sandwiching the partition wall,
The water-stopping agent to be injected into the water-stopping chamber is configured to be pushed out into the water-stopping agent reservoir chamber from the space between the outer periphery of the core wire inserted through the opening and the inner periphery of the opening after filling the water-stopping chamber. The water stop tool for wire harnesses characterized by the above is provided.

As described above, in the water stop device of the present invention, the water stop chamber that needs to be filled with the water stop agent has a small volume, and the water stop agent reservoir chamber that overflows the water stop agent from the water stop chamber is enlarged. Therefore, it can be injected more than filling the water stop chamber where the core part of the electric wire that needs water stop is filled, and the water stop agent is filled in the water stop required portion to ensure water stoppage. Can be done.
Further, if the volume of the water stop agent reservoir chamber is made larger than the volume of the water stop chamber, the tolerance of the injection amount of the water stop agent can be increased, the injection amount can be easily managed, and workability can be improved. And since a water stop chamber can be made small, size reduction of a water stop tool can be achieved.

  Positioning and holding means for the splice portion is provided inside the water stop agent reservoir chamber, and the core wire of one electric wire continuous to the splice portion held by the positioning and holding means is passed through the opening provided in the partition wall, and A space between the outer periphery of the core wire and the inner periphery of the opening is used as a water-stopping agent circulation space, and the water-stopping agent is filled into the water-stopping chamber from the space. It is configured to be extruded.

  As described above, the water-stopping agent overflows from the opening provided in the partition wall into the water-stopping agent reservoir chamber after the water-stopping agent is filled with the water-stopping agent. It is preferable that the silicone or the like used as the water-stopping agent has a medium viscosity so that it does not flow into the water-stopping agent reservoir chamber before filling.

  It is preferable that the volume of the water stop chamber is about 20 to 30% with respect to the total volume of the case consisting of the total volume of the water stop chamber and the water stop agent reservoir chamber.

  The wire insertion port provided in the water stop chamber serves as an insertion port for a single spliced covered wire, while the wire insertion port provided in the water stop agent storage chamber serves as an insertion port for a plurality of spliced wires. It is preferable.

As 2nd invention, the water stop structure provided with the said water stop tool is provided. That is,
A splice portion is formed by jointing a drain wire of a plurality of shield wires and a core wire made of a stranded wire exposed from a peeled end of a ground wire made of a covered wire, and the ground wire is connected to a circuit in an electrical connection box. Connector connection with the core wire of the shield wire,
The splice portion is disposed in the water stop agent reservoir chamber of the water stop tool, and the core wire of the ground wire continuing to the splice portion is passed through the opening of the partition wall, and the ground wire is inserted into the water stop chamber. There is provided a water stop structure provided with a water stop device in which a peeled end is positioned and a portion of the ground wire covered with insulation is pulled out from the wire insertion port and connected to the electrical junction box.

When an electronic control unit (ECU) is used as the electrical connection box connected to the shielded wire, and the ECU is mounted in a flooded area consisting of an engine room, the water stop structure provided with the water stop device of the present invention is Preferably used.
A signal line connected to a sensor or the like is connected to the ECU, and a shield line is preferably used as the signal line. The shield wire is wired by bringing a drain wire into contact with a shield material made of a metal braided wire or a metal foil surrounding the core wire, and a plurality of shield wires are connected to connect the drain wire to an earth circuit in the ECU. The drain wire is spliced with a ground wire made of one covered electric wire, and the ground wire is connected to the ECU by a connector.

In this case, in order to prevent flooding into the ECU transmitted through the ground wire connected to the ECU, it is particularly necessary to prevent flooding of the core wire that is peeled off and exposed at the splice side terminal of the ground wire. Therefore, in the present invention, the grounding terminal of the grounding wire and the core wire exposed from the stripping terminal are disposed in the waterstop chamber of the waterstop, and a waterstop agent for filling the waterstopping chamber is provided. The outer periphery and the gap between the core wire and the outer periphery are filled to stop water. On the other hand, a portion that requires a relatively large volume for disposing the splice portion is the water stop agent reservoir chamber, and the volume of the water stop agent reservoir chamber is larger than the volume of the water stop chamber. In order to prevent water from entering the ECU, it is only necessary to reliably stop the ground wire connected to the ECU, so that it is not necessary to stop the water by filling the splice part with a water-stopping agent. Therefore, it is not necessary to fill the water-stopping agent reservoir chamber with the water-stopping agent, and it is sufficient that the water-stopping agent overflows after the water-stopping chamber is filled.
In addition, the drain line which penetrates the inside of the shield line and is located on the other end side may be cut off and separated, or the vehicle body panel may be grounded.

  The drain wire of the shield wire may be a braided metal braided wire used as a shield material, and the drain wire may be spliced with a core wire formed of a ground wire twisted wire. The splice may be crimped using an intermediate crimp terminal, or may be welding consisting of resistance welding or ultrasonic welding.

  The core wire of the ground wire and the shield wire spliced with the drain wire is peeled off at the terminal on the ECU connection side, and terminals are crimped to the exposed core wires, and waterproof rubber plugs are attached to these terminals and inserted into the connectors. When the connector is engaged, the connector is fitted into a connector mounting portion provided in the ECU, and the terminal is connected to a circuit that is electrically connected to the circuit in the ECU, it is possible to reliably prevent water from entering the ECU from the shield wire.

  As described above, in the water stop device of the first invention, the water stop chamber that needs to be filled with the water stop agent has a small volume, and the water stop agent reservoir chamber that overflows the water stop agent from the water stop chamber is enlarged. Therefore, it is possible to inject more than the water stop agent is filled into the water stop chamber where the core part of the wire that needs water stop is filled, and the water stop agent is filled with the water stop agent in the water stop chamber and stopped. Water can be reliably carried out. Further, if the volume of the water stop agent reservoir chamber is made larger than the volume of the water stop chamber, the tolerance of the injection amount of the water stop agent can be increased, the injection amount can be easily managed, and workability can be improved. And since a water stop chamber can be made small, size reduction of a water stop tool can be achieved.

  The drain wire of the shield wire of the second invention is spliced with a ground wire, and the ground wire is connected to an electric connection box such as an ECU together with the core wire of the shield wire, the splice portion between the drain wire and the ground wire, and the splice A core wire composed of a stranded wire exposed from a skinned terminal of the ground wire continuous to the section is inserted into the water stop device of the first invention, and the ground wire is inserted into a small volume water stop chamber of the water stop device. If water is stopped with a water-stopping agent through the core wire exposed from the skinning terminal, reliable water-stopping can be achieved even if the water-stopper is downsized.

1 is an overall configuration diagram showing a first embodiment of the present invention. (A) is sectional drawing of a shield wire, (B) is sectional drawing of an earth wire, (C) is a partial front view which shows the terminal skinned part of an earth wire. (A) is a perspective view of a splice part, (B) is the BB sectional drawing of (A). The water stop part using a water stop is shown, (A) is a schematic sectional drawing of the horizontal direction of the state which removed the cover, (B) is a schematic sectional drawing of the vertical direction. It is a side view which shows the partition wall provided in a water stop. (A) is a perspective view of a water stop, (B) is a perspective view of a support stand and a receiving plate provided in the water stop. The 2nd Embodiment of this invention is shown, (A) is a top view of the state which removed the cover of the water stop, (B) is the principal part enlarged view of (A), (C) is C- of (B). It is an expanded sectional view of C line. It is the schematic which shows a prior art example. (A) (B) is drawing which shows the conventional water stop tool.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6 show a first embodiment of the present invention.
In the first embodiment, drains of a plurality of shield wires 3 (3A, 3B) connected to an electronic control unit 2 (hereinafter abbreviated as an ECU) and an auxiliary device 50 mounted in a flooded area such as an engine room of a vehicle. The line 4 (4A, 4B) is stopped using the water stop tool 1.

The shield wire 3A connected to the ECU 2 has one core wire 5, and as shown in FIG. 2A, the shield wire 3A is surrounded by a shield material 6 made of a metal braided wire or metal foil tape together with one drain wire 4A. The material 6 is covered with a sheath (outer skin) 7 made of an insulating resin. The core wire 5 is a round electric wire in which the core wire 5a is covered with an insulating coating 5b, and the drain wire 4 is a stranded wire of a plurality of strands and is a bare wire without an insulating coating.
The shield wire 3B connected to the ECU 2 has two core wires 5, and the two core wires 5 and one drain wire 4B are surrounded by a shield material 6 and covered with a sheath 7.

  The shield wires 3A and 3B are peeled off the sheath 7 and the shield material 6 on the terminal side connected to the ECU 2 to expose the core wire 5 and the drain wires 4 (4A, 4B), and the three core wires 5 are further connected to the terminal side. Then, the insulation coating 5b is peeled off to expose the core wire 5a, and the terminal (female crimp terminal) 8A is crimped.

The drain wire 4A of the shield wire 3A and the drain wire 4B of the shield wire 3B are spliced with one end of a ground wire 9 made of a round wire in which a core wire 9a made of a stranded wire shown in FIG. A terminal (female crimp terminal) 8B is crimped to the core wire 9a exposed by peeling off the other end of the ground wire 9.
The terminal 8B of the terminal of the ground wire 9 and the terminal 8A of the terminal of the core wire 5 of the shield wires 3A and 3B are inserted and locked to the connector 10, and are fitted into the connector fitting portion 2a provided in the ECU 2, so that the ECU 2 A male terminal (not shown) connected to the internal circuit is fitted and connected. An earth circuit 12 in the ECU 2 connected to the earth wire 9 via a terminal 8B is connected to an earth wire 13 that is grounded to a vehicle body panel or the like.

  As shown in FIGS. 3A and 3B, the drain wires 4A and 4B of the shield wires 3A and 3B and the splice portion S of the core wire 9a of the ground wire 9 made of a covered wire are crimped and crimped by an intermediate crimp terminal 24. Are jointed. The splice is not limited to crimping with a crimp terminal, but may be performed by welding such as resistance welding or ultrasonic welding.

  In order to prevent water from entering the ECU 2 from the splice portion S through the ground wire 9, the water stop tool 1 shown in FIGS. 4 to 6 is used. The water stop 1 includes a case 14 composed of a resin main body 15 and a lid 16. The main body 15 has a box shape having an upper surface opening closed by the lid 16. Partitioned into a liquid reservoir chamber 19. In addition, as shown in FIG. 4B, the bottom wall 20 a of the water stop chamber 18 is shallower than the bottom wall 20 b of the water stop agent reservoir chamber 19. Further, the partition wall 17 is provided at a position about 20% of the entire length from one end in the length direction on the water stop chamber 18 side, the volume of the water stop chamber 18 is made smaller than the volume of the water stop agent reservoir chamber 19, and the case 14 The total volume is about 20 to 30%. The main body 15 and the lid 16 are provided with a lock portion and a locked portion (not shown), and are locked when the lid is closed.

  One end wall 19a (right side wall in the figure) in the length direction of the water stop agent reservoir chamber 19 is provided with a drain wire insertion port 19b having an upper surface opening. On the other hand, as shown in FIG. One ground wire insertion port 18b is provided at the center position L in the height direction of the other end wall 18a (left side wall in the figure) in the length direction. The ground wire insertion port 18b has the same size as the outer diameter of the ground wire 9 to be inserted, and is sized so that it can be inserted without a gap.

  The partition wall 17 that partitions the water stop chamber 18 and the water stop agent reservoir chamber 19 is also used for inserting a circular core wire having a diameter larger than the core wire 9a of the ground wire 9 at the center position L in the height direction and for circulating the water stop agent. An opening 17a is provided. The core wire 9a is passed through the opening 17a, and a space 17c is provided between the outer periphery of the core wire 9a and the inner periphery of the opening 17a, and the water-stopping agent 25 injected into the water-stopping chamber 18 is overflowed so as to overflow the space 17c. It escapes to the reservoir chamber 19.

  In addition, a support base 21 of the splice portion S protrudes from the bottom wall 20b and a receiving plate 22 protrudes from the lower surface of the lid 16 at the opposite position in the water stop agent reservoir chamber 19. As shown in FIG. 6B, the support base 21 includes a semicircular recess 21a on the upper surface, and the recess 21a is used for fitting the substantially lower half circumference of the splice portion S. The upper receiving plate 22 is provided with a semicircular recess 22 a on the lower surface so as to abut the tip surface of the splice portion S so that the splice portion S can be positioned and held by the support base 21 and the receiving plate 22.

  The lid 16 that closes the upper surface opening of the main body 15 is provided with a water stop agent inlet 16a at a portion corresponding to the upper surface of the water stop chamber 18 and a cap 16b that is closed after the water stop agent is injected through a hinge 16h. ing.

  The water-stopping agent 25 injected into the water-stopping chamber 18 from the water-stopping agent inlet 16a is made of silicone or the like, and the viscosity of the water-stopping agent 25 is a medium viscosity having fluidity to move when pushed out. Yes.

The water stop of the splice portion S using the water stop agent 25 is performed by mounting the splice portion S on the support base 21 in the water stop agent reservoir chamber 19 of the water stop tool 1, and connecting the ground wire 9 to the opening 17 a of the partition wall 17. After the core wire 9a is passed and the ground wire 9 is also passed through the water stop chamber 18, the main body 15 is covered with the cover 16, the splice portion S is positioned and set by the receiving plate 22, and the water stop agent is inserted from the water stop agent inlet 16a. 25 is injected into the water stop chamber 18.
After the water stop agent 25 is filled in the water stop chamber 18, it is pushed out into the space 17 c of the opening 17 a of the partition wall 17 and overflows in the water stop agent reservoir chamber 19. The amount of the water-stopping agent 25 injected into the water-stopping tool 1 is an amount that overflows the water-stopping agent reservoir chamber 19 after the water-stopping chamber 18 is filled with the water-stopping agent 25, and an amount that overflows into the water-stopping agent reservoir chamber 19. Even if the size of the splice portion S and the size of the ground wire 9 are different, the amount does not overflow from the water stop agent reservoir chamber 19. Specifically, the injection amount of the water stop agent 25 is about 50% or more of the total volume of the water stop chamber 18 and the water stop agent reservoir chamber 19 (the volume of the water stop device 1) is equal to or greater than the volume of the water stop chamber 18. Hereinafter, it is preferably 20 to 30%.

  As described above, the shield wires 3A and 3B are connected to the ECU 2 by connecting the core wire 5 of the shield wires 3A and 3B to the signal circuit and the power circuit in the ECU 2, and the drain wires 4A and 4B of the shield wires 3A and 3B. Is spliced with a ground wire 9 made of a covered electric wire, and the ground wire 9 is connected to a ground circuit 12 in the ECU 2.

  It is necessary to prevent water from entering the ECU 2 from the shielded wires 3A and 3B connected to the ECU 2. Since the core wire 5 is covered with the insulating coating 5b, the core wire 5 is provided with a rubber plug 29A on the terminal 8A connected to the end of the core wire 5a to take measures against water stoppage. That is, the terminal 8A to which the rubber plug 29A is attached is inserted and locked to the connector 10, the connector 10 is fitted to the connector fitting portion 2a of the ECU 2, and the terminal 8A is fitted and connected to the terminal in the ECU 2. The rubber plug 29A is attached to the end of the core wire 5 of the shielded wires 3A and 3B, thereby preventing water from entering the ECU 2 from the connector connecting portion.

  On the other hand, the drain wires 4A and 4B of the shield wires 3A and 3B spliced with the ground wire 9 are bare wires without insulation coating, and the drain wires 4A and 4B and the core wire 9a of the ground wire 9 are added at the intermediate crimp terminal 24. The tightened splice portion S may be submerged, and there is a risk that water may permeate from the splice portion S into the inside of the core wire 9 a of the ground wire 9 and enter the ECU 2. Therefore, first, the splice part S is held in the water stop agent reservoir chamber 19 sealed by the main body 15 and the lid 16 of the water stop tool 1 so as not to be splashed with water. The core wire 9a of the ground wire 9 extending from the splice portion S to the ECU 2 is inserted into the water stop chamber 18 through the opening 17a of the partition wall 17, and the peeled end 9c of the ground wire 9 is positioned in the water stop chamber 18 so as to cover the insulation. In the state of the covered electric wire covered with 9b, it is pulled out to the ECU 2 side through the ground wire insertion port 18b provided in the other end wall 18a on the front end side of the water stop chamber 18.

  Since the water-stopping agent 25 is filled in the water-stopping chamber 18, the water-stopping agent 25 is filled in the gap and the outer periphery of the core wire 9 a peeled off from the ground wire 9, and the core wire is formed inside the ground wire 9. It is possible to prevent water from penetrating into the ECU 2 through 9a. In this manner, the ground wire 9 connected to the ECU 2 is reliably stopped in the water stop chamber 18 having a reduced volume. In the ECU connection side terminal of the ground wire 9, similarly to the core wire, a rubber plug 29 B is attached to the terminal 8 B connected to the terminal of the ground wire 9, and is inserted and locked to the connector 10. The connector fitting portion 2a is fitted, the terminal 8B is fitted and connected to the terminal in the ECU 2, and the shielded drain wires 4A and 4B are connected to the ground circuit in the ECU 2 via the ground wire 9.

  As described above, since the ground wire 9 connected to the ECU 2 only needs to stop the peeled core wire 9a connected to the splice portion S, the ground wire 9 is stopped in the water stop chamber 18 where the core wire 9a and the peeled end 9c are located. The liquid medicine 25 may be filled. Since the water stop chamber 18 has a small volume, the amount of the water stop agent 25 to be injected can be reduced, and the water stop tool 1 itself can be downsized.

  At the other end of the shielded wires 3A and 3B, a terminal 8A is connected to the terminal of the core wire 5 similarly to the ECU connection side, and is connected to an auxiliary machine 50 to which a signal is transmitted from the ECU2. The other end (the side opposite to the ECU connection side) of the drain line 4A, 4B passing through the shield lines 3A, 3B on the auxiliary machine 50 side may be cut off or grounded to the vehicle body panel.

  When the water stop structure of the drain wire and the ground wire using the water stop device 1 is used, the water stop agent 25 to be injected into the water stop device 1 is filled in the water stop chamber 18 with a small volume and then stopped with a large volume. Since the liquid agent reservoir 19 overflows, the tolerance of the injection amount of the water-stopping agent 25 can be increased, and the management of the injection amount of the water-stopping agent becomes easy. In addition, since the volume of the water-stopping agent reservoir chamber 19 is increased, the water-stopping agent 25 overflowing the water-stopping agent reservoir chamber 19 is further added even if the injection amount of the water-stopping agent 25 is increased. 19 will not be overflowing.

FIG. 7 shows a second embodiment.
The second embodiment is different from the first embodiment in which a medium viscosity water stop agent 25 made of a silicone resin or the like is used in that a low viscosity epoxy resin having good fluidity is used as the water stop agent 25B. To do. The use of the low-viscosity water-stopping agent 25B has the advantage that the filling speed of the water-stopping device 1 into the water-stopping chamber 18 can be increased and the working time can be shortened, but the water-stopping chamber 18 is filled with the water-stopping agent 25B. There is a risk that the water-stopping agent 25B may flow from the space 17c of the opening 17a of the partition wall 17 to the water-stopping agent reservoir chamber 19 before. Therefore, the annular rubber plug 30 is externally fitted to a portion where the core wire 9a peeled off from the ground wire 9 passes through the opening 17a.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  The water stop agent 25B injected into the water stop chamber 18 from the water stop agent inlet provided on the lid of the water stop device 1 is provided with an annular rubber plug 30 in which the opening 17a of the partition wall is closely fitted with the core wire 9a. Therefore, the water stoppage chamber 18 is prevented from flowing into the waterstop agent reservoir chamber 19 through the opening 17a until the water stoppage chamber 18 is filled with the water stoppage agent 25B. The water-stopping agent 25B filled in the water-stopping chamber 18 flows into the gap 9d between the plurality of strands 9s constituting the core wire 9a exposed by peeling off the insulation coating of the ground wire 9, and enters the core wire 9a. A void that is not filled with the water stop agent 25B is not generated.

  When the water-stopping agent 25B is filled in the water-stopping chamber 18, the water-stopping agent 25B that has entered the gap 9d between the strands 9s of the core wire 9a is transferred into the gap 9d even in the rubber plug 30 attached to the opening 17a of the partition wall 17. It flows into the water-stopper reservoir chamber 19 through. Therefore, the inside of the water stop chamber 18 is surely filled with the water stop agent 25B, and the water stop agent 25B is filled in the outer periphery of the core wire 9a and the gap 9d between the strands 9s, so that no gap is generated. The water stop of the core wire 9a of the ground wire can be reliably achieved.

  In this way, the water-stopping agent 25B injected into the water-stopping chamber 18 can overflow through the opening 17a for inserting the core wire provided in the partition wall 17 that partitions the water-stopping chamber 18 and the water-stopping agent reservoir chamber 19. Management of the injection amount of liquid medicine becomes easy. And even if it uses the low-viscosity water stop agent 25B with good workability | operativity, there exists an advantage which can suppress the inflow from the water stop chamber 18 to the water stop agent reservoir chamber 19, and can make the injection amount of the water stop agent 25B small. .

The present invention is not limited to the above-described embodiment, and the drain wire of the shield wire may be a metal braided wire used as a shield material and twisted as a single core wire. A water-stopping agent that fills the water-stopping chamber by placing the splice part in the water-stopping agent reservoir chamber of the water-stopping tool, and placing the peeled end of the ground wire and the exposed core wire in the water-stopping chamber You may stop the water with.
Further, the drain wire of three or more shield wires may be spliced with the ground wire.
Further, the splice may be welded by resistance welding or ultrasonic welding instead of crimping by a crimp terminal.

1 Water stop device 2 ECU
3 (3A, 3B) Shielded wire 4 (4A, 4B) Drain wire 5 Core wire 9 Ground wire 9a Core wire 10 Connector 14 Case 15 Body 16 Lid 16a Water-stop agent inlet 17 Partition wall 17a Open 18 Water stop chamber 19 Water stop Agent storage chamber 25 Water stop agent 30 Rubber stopper 50 Auxiliary machine S Splice part

Claims (4)

It consists of a main body and a lid, and the inside of the main body is partitioned by a partition wall to divide into a small-capacity water stop chamber and a water stop agent reservoir chamber having a larger volume than the water stop chamber, and the lid is water-stopped to the water stop chamber. The water-stop agent reservoir chamber is provided with a water-stop agent injection port for injecting the agent, and at the middle position in the height direction of the partition wall is provided with an opening for inserting a core wire and for the flow of the water-stopper, and sandwiching the partition wall In addition, a wire insertion opening is provided on both side walls of the water stop chamber, and the water stop agent injected into the water stop chamber is filled between the water stop chamber and then inserted between the outer periphery of the core wire and the inner periphery of the opening. A waterproofing device for a wire harness, wherein the waterproofing device is pushed out from a space into a water-stopper reservoir chamber. Positioning and holding means for the splice portion is provided inside the water stop agent reservoir chamber, and the core wire of one electric wire continuous to the splice portion held by the positioning and holding means is passed through the opening provided in the partition wall, and A space between the outer periphery of the core wire and the inner periphery of the opening is used as a water-stopping agent circulation space, and the water-stopping agent is filled into the water-stopping chamber from the space. The water stop tool for a wire harness according to claim 1, wherein the water stop device is pushed out into the wire harness. A stranded wire comprising a water stop structure for a wire harness according to claim 1 or 2 and exposed from a peeled end of a ground wire composed of a drain wire of a plurality of shield wires and a covered wire. A splice portion is formed by jointing with a core wire comprising: the ground wire is connected to a circuit in an electric junction box together with the core wire of the shield wire, and the splice portion is connected to the water stop of the water stop tool. Insulating coating of the ground wire by disposing the core wire of the ground wire continuous with the splice portion through the opening of the partition wall and positioning the peeled end of the ground wire in the water stop chamber The water stop structure provided with the water stop tool which pulled out the made part from the said electric wire insertion port, and is connected to the said electrical-connection box. Said electronic control unit (ECU) is used as an electric connection box, the ECU is water shut-off structure having a water stop device of claim 3 mounted on the immersion region consisting of the engine room to be connected to the shield wire .

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