JP2011134605A - Wire harness and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire harness, along with a method of manufacturing the same, capable of substantially maintaining airtightness by avoiding melting of a sheath of a cable as much as possible, between a housing of a connector and the cable. <P>SOLUTION: In order to regulate movement in a length direction of cables 2a to 2c in pulling-off or pressing-in force of the cables 2a to 2b from or to a second housing 10, a metal member 50 is provided at an outer periphery of the cables 2a to 2c between blocked parts 38 by caulked and fixed so as to be protruded outside a radial direction of the cables 2a to 2c. By inserting a melting member 37 into an insertion part 39 and melting a tip end of the melting member 37 in contact with the metal member 50 as the melting member 37 is pressed toward the metal member 50 side while being vibrated, and pouring molten resin as the molten melting member 37 between a gap 36 of the blocked parts 38 to cover the surroundings of the cables 2a to 2c with the molten resin, airtightness of an airtight block 35 and the cables 2a to 2c is to be maintained. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a wire harness capable of sufficiently maintaining an airtightness between a connector housing and a cable, and a method of manufacturing the same.

  In general, in a wire harness used in a vehicle or the like, in order to prevent water and the like from entering the inside of the connector and causing a malfunction, the connector housing and the cable are kept airtight between them. Airtight holding structure is provided.

  The conventional wire harness 111 shown to Fig.8 (a), (b) uses the wire seal 114 for the airtight holding | maintenance structure.

  In the wire harness 111, a rubber waterproof wire seal 114 is inserted between the outer housing 113 of the connector 116 and the cable 112, and the wire seal 114 is crushed between the outer housing 113 and the cable 112, thereby forming the outer housing. The airtightness between the outer housing 113 and the cable 112 is maintained by closely contacting both the cable 113 and the cable 112.

  The outer housing 113 is formed with a cable insertion hole 117 into which the end of the cable 112 is inserted. The wire seal 114 is a wire seal housing recess formed on the insertion side of the cable insertion hole 117 of the outer housing 113. 118. The opening of the wire seal housing recess 118 is blocked by the tail plate 115 to prevent the wire seal 114 from falling off.

  However, when the wire seal 114 is used in the airtight holding structure between the outer housing 113 and the cable 112, the wire seal 114 is provided for each cable 112, and each wire seal 114 is accommodated in the wire seal accommodating recess 118. Since it is necessary, the distance between the cables becomes wide in design and it becomes difficult to reduce the pitch of the cables 112. In particular, since a wire harness for a vehicle is required to be downsized, an airtight holding structure that can further reduce the pitch of the cable 112 is desired.

  9A, the cable 122 is sandwiched between an outer housing 123 made of resin and a welding member 124 made of resin, and the welding member 124 is ultrasonically welded to the outer housing 123 using a horn 125. Thus, there has been proposed a wire harness 121 configured to maintain airtightness between the outer housing 123 and the cable 122 (see, for example, Patent Document 1).

  In the wire harness 121, as shown in FIG. 9B, a groove 123a is formed in the outer housing 123 and a groove 124a is formed in the welding member 124, and the cable 122 is disposed in the groove 123a of the outer housing 123. From above, the welding member 124 is overlapped so that the groove 124a comes to the position of the cable 122. In this state, the horn 125 is brought into contact with the upper surface of the welding member 124, and the welding member 124 is vibrated and pressed downward from above ( The welding member 124 is ultrasonically welded to the outer housing 123.

JP 2000-48901 A Japanese Patent Laid-Open No. 11-66807

  However, the wire harness 121 described above has the following problems.

  In the technique related to ultrasonic welding disclosed in Patent Document 1, the sheath 122a that is the surface portion of the cable 122 is also melted. However, when designing or selecting the sheath 122a of the cable 122, ultrasonic welding is used. Assuming that the sheath 122a is melted, it is necessary to examine the thickness and material of the sheath 122a, which has been a limitation in designing the wire harness. In particular, regarding the thickness of the sheath 122a, it is necessary to design the sheath 122a to be thicker than usual, assuming that the sheath 122a is melted by ultrasonic welding.

  Accordingly, the present invention has been made in view of the above circumstances, and a wire harness capable of maintaining a sufficient airtightness between a housing of a connector and a cable without melting the sheath of the cable as much as possible, and the wire harness An object is to provide a manufacturing method.

  The present invention was devised to achieve the above object, and is a wire harness including a plurality of cables arranged in parallel and a connector having a housing to which ends of the plurality of cables are connected. The housing has an airtight block in which a plurality of cable insertion holes for inserting the plurality of cables into the housing are formed in parallel on a side to which the plurality of cables are connected, and each cable insertion The hole is formed so as to have a gap of a predetermined distance between the cable and the hermetic block, and communicates so that the adjacent cable insertion holes overlap with each other. Two sealing portions that block the space between the airtight block and the cable at a location and define a part of the cable insertion hole; An insertion portion that is a portion into which a member is inserted, and in order to restrict the longitudinal movement of the cable in the pulling or pushing force of the cable with respect to the housing, on the outer periphery of the cable between the closing portions, A metal member fixed by caulking so as to protrude outward in the radial direction of the cable; and the insertion portion includes a molten member in the airtight block, and the metal member in the cable insertion hole between the closure portions. Formed in a position where it can be inserted so as to be pressed against the metal member, and the molten member is inserted into the insertion portion and pressed against the metal member while vibrating the molten member, thereby contacting the metal member The molten resin is melted at the tip of the melting member, and the molten resin that is the molten member is poured into the gap between the closed portions, and the molten resin is surrounded by the cable. By covering a wire harness which is adapted to hold the airtightness of the cable and the air-tight block.

  Further, the metal member is formed to be shorter than the length of the cable insertion hole defined between the closed portions, and an exposed portion that is not covered with the metal member is formed in the cable between the closed portions. It may be.

  Further, when the molten resin is poured into the gap between the closed portions, the cable is pulled backward so as to be pulled out of the housing, and the molten metal is brought into contact with the closed closed portion. You may make it pour resin.

  The hermetic block may be made of resin, and the melting member and the hermetic block may be made of the same material or materials having a similar melting temperature.

Further, the closing part may comprise a holding part for holding the cable so as to hold the gap formed around the cable at a predetermined distance.
The hermetic block is composed of a pair of resin-made split airtight blocks that are divided into two so as to sandwich the plurality of cables arranged in parallel from above and below, and the plurality of cables are connected by the pair of both split airtight blocks. In a sandwiched state, the pair of divided hermetic blocks may be welded and integrated by ultrasonic welding.

  Further, after the gap between the closed portions is completely filled with the molten resin, the cable is further filled with the molten resin that has flowed into the gap between the sandwiching portions by further pressing and melting the melting member. You may make it press.

  In addition, a plurality of the insertion portions may be formed, a melting member may be inserted into each of the plurality of insertion portions, and the plurality of melting members inserted into the plurality of insertion portions may be pressed simultaneously.

  The present invention has been made in order to achieve the above object, and includes a wire having a plurality of cables arranged in parallel and a connector having a housing to which ends of the plurality of cables are connected. In the harness manufacturing method, the housing includes an airtight block in which a plurality of cable insertion holes for inserting the plurality of cables into the housing are formed in parallel on a side to which the plurality of cables are connected. The cable insertion holes are formed so as to have a gap of a predetermined distance between the cable and the hermetic block, and communicate with each other so that adjacent cable insertion holes overlap with each other. Two closed portions that block between the airtight block and the cable at two locations in the longitudinal direction of the cable and define a part of the cable insertion hole; An insertion portion that is a portion into which a melting member made of resin is inserted, and the cable between the closure portions to restrict longitudinal movement of the cable in the pulling or pushing force of the cable with respect to the housing A metal member that is fixed by caulking so as to protrude outward in the radial direction of the cable, and the insertion portion includes a fusion member in the cable insertion hole between the closure portions. The metal member is formed at a position where it can be inserted so as to be pressed against the metal member, the molten member is inserted into the insertion portion, and the molten member is pressed against the metal member while vibrating. The tip of the melting member in contact with the molten member is melted, and the molten resin, which is the molten member, is poured into the gap between the closed portions. The by covering with the molten resin, a method of manufacturing the wire harness to hold the airtightness of the cable and the air-tight block.

  ADVANTAGE OF THE INVENTION According to this invention, between the housing of a connector and a cable, the wire harness which can fully maintain airtight, and its manufacturing method can be provided, without fuse | melting the sheath of a cable as much as possible.

It is a perspective view which shows the wire harness which concerns on one embodiment of this invention. It is the sectional view on the AA line of FIG. (A) is the BB sectional drawing of FIG. 1, (b) is the D section enlarged view. (A) is CC sectional view taken on the line of FIG. 1, (b) is the E section enlarged view. It is a side view which shows the 1st junction terminal in the wire harness of FIG. It is a figure which shows the 2nd junction terminal in the wire harness of FIG. 1, (a) is a side view, (b) is a bottom view. It is a figure which shows the 2nd junction terminal in the wire harness of FIG. 1, (a) is a side view, (b) is a bottom view. It is a figure which shows the conventional wire harness, (a) is a longitudinal cross-sectional view, (b) is the 8B-8B sectional view taken on the line. It is a figure which shows the conventional wire harness, (a) is a longitudinal cross-sectional view, (b) is an exploded cross-sectional view which shows the airtight holding structure.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a perspective view showing a wire harness according to the present embodiment, FIG. 2 is a cross-sectional view taken along line AA of FIG. 2, and FIG. 3A is a cross-sectional view taken along line BB of FIG. FIG. 4B is an enlarged view of the D portion, FIG. 4A is a cross-sectional view taken along the line CC of FIG. 1, and FIG. Although details will be described later, FIG. 1 shows a state after the melting member 37 is melted, and FIGS. 2 to 4 show a state before the melting member 37 is melted.

  As shown in FIGS. 1-4, the wire harness 1 is provided with the some cable 2a-2c arrange | positioned in parallel, and the connector 3 to which the edge part of the cables 2a-2c is connected.

  The wire harness 1 is used to connect, for example, a motor of a hybrid electric vehicle (hereinafter referred to as HEV) and an inverter that drives the motor.

  Cable 2a-2c forms the sheath 5 which consists of bridge | crosslinking polyethylene etc. in the outer periphery of the center conductor 4 which consists of copper or aluminum. The cables 2a to 2c may be formed by sequentially forming an insulator, a shield conductor, and a sheath 5 on the outer periphery of the center conductor 4. Electricity of different voltage and / or current is transmitted to each of the cables 2a to 2c. For example, in the present embodiment, three cables 2a to 2c are used assuming a three-phase AC power line between the motor and the inverter, and each of the three cables 2a to 2c includes 120 cables. ° ACs with different phases are transmitted.

  The connector 3 includes a first connector portion 8 having a first housing 7 in which a plurality (three) of first joining terminals 6a to 6c are accommodated and a plurality of (three) second joining terminals 9a to 9c. And a second connector portion 11 having a second housing 10 in which the housings are arranged and stored.

  In the present embodiment, the two housings 7 and 10 are formed so that the first housing 7 is a male and the second housing 10 is a female when the two connector portions 8 and 11 are fitted. The male / female relationship may be reversed, and the first housing 7 may be a female and the second housing 10 may be a male.

  In the present embodiment, the first connector portion 8 is connected to a device such as a motor or an inverter, and the second connector portion 11 is connected to the cables 2a to 2c. The connector 3 connects the device such as a motor or an inverter to the cable 2a. The case where ˜2c is connected will be described. That is, in the present embodiment, the second connector portion 11 is provided with an airtight holding structure between the cables 2a to 2c and the housing (second housing 10).

  Here, prior to describing the airtight holding structure in the present embodiment, the connector 3 will be described. In addition, the structure of the connector 3 demonstrated here is an example to the last, and this invention is not limited to this.

  In this Embodiment, when the 1st connector part 8 and the 2nd connector part 11 are fitted as the connector 3, each of one surface of several 1st junction terminals 6a-6c and several 2nd junction terminals 9a-. The ones that face each other so as to be paired with each other and use a stacked state in which the first joining terminals 6a to 6c and the second joining terminals 9a to 9c are alternately arranged. This is a so-called “laminated structure type connector”.

  First, the 1st connector part 8 is demonstrated.

  The first connector portion 8 is an abbreviation that insulates the first housing 7 in which the three first joint terminals 6a to 6c are arranged and accommodated, and the first joint terminals 6a to 6c provided in the first housing 7 respectively. It comprises a plurality of rectangular parallelepiped insulating members 12a to 12d and a head portion 13a and a shaft portion 13b connected to the head portion 13a. The shaft portion 13b is formed of a plurality of first joining terminals 6a to 6c and a plurality of second joining terminals. Each of the contacts according to 9a to 9c and the plurality of insulating members 12a to 12d are penetrated, and the adjacent first insulating member 12a is pressed by the head portion 13a, whereby the plurality of first connecting terminals 6a to 6c and the plurality of first members are pressed. The two joining terminals 9a to 9c are collectively fixed and electrically connected at each contact, and at least a portion penetrating each contact includes a connection member 13 formed of an insulating material.

  The first housing 7 includes a first outer housing 7a and a first inner housing 7b that holds the first connecting terminals 6a to 6c in the first outer housing 7a.

  The first outer housing 7a is preferably formed of a metal such as aluminum having high electrical conductivity and high thermal conductivity in order to improve shielding performance, heat dissipation, and weight reduction of the connector 3. You may make it form by. In the present embodiment, the first outer housing 7a is made of aluminum.

  The first inner housing 7b is made of an insulating resin such as PPS (polyphenylene sulfide) resin, PPA (polyphthalamide) resin, PA (polyamide) resin, PBT (polybutylene terephthalate).

  The 1st junction terminals 6a-6c are plate-shaped terminals, and consist of metals, such as silver, copper, and aluminum with high electrical conductivity. The first joining terminals 6a to 6c are aligned and held at a predetermined interval in the first outer housing 7a by the first inner housing 7b. Each of the first joint terminals 6a to 6c has some flexibility.

  As shown in FIG. 5, the first insulating members 12a to 12c are fixed to the surfaces of the first connecting terminals 6a to 6c opposite to the surfaces to be bonded to the second connecting terminals 9a to 9c. Moreover, when the 1st junction terminals 6a-6c and the 2nd junction terminals 9a-9c will be in a lamination | stacking state, it is opposite to the surface joined to the 1st junction terminal 6c of the 2nd junction terminal 9c located in the outermost part. The second insulating member 12d is fixed to the inner surface of the first outer housing 7a so as to face the side surface. Each of the insulating members 12a to 12d is fixed at a position protruding to the tip side of the first joint terminals 6a to 6c, and the second joint terminal 9a is improved in order to improve the insertability of the second joint terminals 9a to 9c. The corners on the side where 9c are inserted and removed are chamfered. In addition, in FIG. 5, the structure of the 1st insulation members 12a-12c is simplified and the 1st insulation members 12a-12c are drawn similarly.

  The connecting member 13 is made of a metal (for example, SUS, iron, copper alloy, or the like) bolt 14 and an insulating resin (for example, an insulating material) on an outer periphery (including a portion penetrating each contact) of the shaft portion 13b. The insulating layer 15 is formed by coating PPS (polyphenylene sulfide) resin, PPA (polyphthalamide) resin, PA (polyamide) resin, PBT (polybutylene terephthalate)). In addition, although not shown in figure, the recessed part which a hexagon wrench (it is also called a hexagon stick spanner) fits is formed in the upper surface of the head 13a of the volt | bolt 14 as the connection member 13. As shown in FIG.

  Between the lower surface of the head 13a of the connecting member 13 and the upper surface of the first insulating member 12a immediately below the elastic member 16 is provided that applies a predetermined pressing force to the first insulating member 12a. Here, the elastic member 16 is made of a spring made of metal (for example, SUS). The upper surface of the first insulating member 12a with which the lower part of the elastic member 16 abuts is formed with a concave part 17 that houses the lower part of the elastic member 16, and the bottom part of the concave part 17 (that is, the seat part with which the lower part of the elastic member 16 abuts). ) Is provided with a receiving member 18 made of metal (for example, SUS) that receives the elastic member 16 and prevents damage to the first insulating member 12a.

  The connecting member 13 is inserted into the first outer housing 7a from the surface side (the upper surface side in FIG. 4A) of the first connecting terminals 6a to 6c to which the first insulating members 12a to 12c are fixed. The screw portion 19 at the tip of the shaft portion 13b is screwed into the screw hole 20 formed in the inner peripheral surface of the first outer housing 7a, so that the head portion 13a of the connection member 13 is directed toward the tip of the shaft portion 13b ( In the case of FIG. 4 (a), pressing is performed from the upper side to the lower side, and the first connecting terminals 6a to 6c and the second connecting terminals 9a to 9c are fixed together at each contact and electrically connected. Yes.

  A packing 21 that prevents water from entering the first outer housing 7a is provided on the outer periphery of the head 13a of the connection member 13. In addition, a packing 22 that contacts the inner peripheral surface of the second housing 10 (second outer housing 10a) when both the connector portions 8 and 11 are fitted is provided on the outer peripheral portion of the first outer housing 7a.

  A connection member insertion hole 23 for inserting the connection member 13 is formed in the upper portion (upper side in FIG. 4A) of the first outer housing 7a. The connecting member insertion hole 23 is formed in a cylindrical shape, and its cylindrical lower end (lower side in FIG. 4A) is bent inward. The stroke of the connecting member 13 is regulated by the edge peripheral portion of the lower surface of the head portion 13a of the connecting member 13 coming into contact with the bent portion.

  A flange 24 (a mounting hole is omitted) is formed on the outer periphery of the first outer housing 7a for fixing the first connector portion 8 to a housing such as a device (for example, a shield case of a motor or an inverter). When connecting the first connector portion 8 to the motor (or inverter), the flange 24 is fixed to the shield case of the motor (or inverter) and the first connecting terminals 6a to 6c exposed from the first housing 7 are used. Are connected to each terminal of the terminal block installed in the shield case of the motor (or inverter). The first connector portion 8 is attached to both the motor and the inverter, and the second connector portions 11 provided at both ends of the cables 2a to 2c are respectively fitted to the first connector portion 8 so that the wire harness 1 is interposed. Thus, the motor and the inverter are electrically connected.

  Next, the 2nd connector part 11 is demonstrated.

  The second connector portion 11 includes a second housing 10 in which a plurality (three) of second connection terminals (female terminals) 9a to 9c are arranged and stored. The second joint terminals 9a to 9c are electrically connected to the ends of the cables 2a to 2c.

  The second housing 10 includes a second outer housing 10a and an airtight block 35 (to be described later), and a multi-tubular shape (a plurality of tubes) in which the cables 2a to 2c are arranged and held at predetermined intervals in the second outer housing 10a. Is a second inner housing 10b).

  The second outer housing 10a is preferably formed of a metal such as aluminum having a high conductivity and a high thermal conductivity in order to improve shielding performance, heat dissipation, and weight reduction of the connector 1. You may make it form by. In the present embodiment, the second outer housing 10a is formed of an insulating resin.

  The second inner housing 10b (including an airtight block 35 described later) is made of an insulating resin such as PPS (polyphenylene sulfide) resin, PPA (polyphthalamide) resin, PA (polyamide) resin, PBT (polybutylene terephthalate). .

  The 2nd junction terminals 9a-9c consist of metals, such as silver, copper, and aluminum with high electrical conductivity. Each of the second joint terminals 9a to 9c holds the cables 2a to 2c (the cables 2a to 2c at positions close to the second joint terminals 9a to 9c) by the second inner housing 10b, whereby the second outer housing 10a Are kept aligned. Each of the 2nd junction terminals 9a-9c has some flexibility.

  As shown in FIG. 6, the second joining terminals 9a and 9c arranged at both ends at the time of alignment are caulked portions 25 for caulking the conductors 4 exposed from the end portions of the cables 2a and 2c, and caulked portions 25, And a U-shaped contact 26 formed integrally. A tapered portion 27 is formed at the distal end portion of the U-shaped contact 26 in order to improve the insertability.

  As shown in FIG. 7, the second joint terminal 9b arranged at the center during alignment is caulked for caulking the conductor 4 exposed from the tip of the cable 2b, like the second joint terminals 9a and 9c. 25 and a U-shaped contact 26 formed integrally with the caulking portion 25, but is bent at the body portion 28 so that the U-shaped contact 26 is positioned on the central axis of the cable 2b. Yes. A tapered portion 27 is formed at the distal end portion of the U-shaped contact 26 in order to improve the insertability.

  When the first connector portion 8 and the second connector portion 11 are fitted, the U-shaped contact 26 is inserted so as to sandwich the shaft portion 13 b of the connecting member 13. In the present embodiment, the second joint terminals 9a and 9c are arranged so that the U-shaped contact 26 comes to the second joint terminal 9b side, and the second joint terminals 9b are arranged at the center during alignment. By bending the body portion 28, the second joining terminals 9a to 9c are arranged at the same interval.

  A braided shield 29 for the purpose of improving the shielding performance is wound around the portions of the cables 2a to 2c drawn out from the second outer housing 10a. The braided shield 29 is in contact with a cylindrical shield body 30 to be described later, and is electrically connected to the first outer housing 7a via the cylindrical shield body 30 (the same potential (GND)).

  Further, a rubber boot 31 for preventing water from entering the second outer housing 10a is put on the outer periphery of the second outer housing 10a from which the cables 2a to 2c are drawn. In FIGS. 1 to 3, the braided shield 29 and the rubber boot 31 are omitted for simplification of the drawing.

  A packing 32 that contacts the inner peripheral surface of the first outer housing 7a is provided on the outer peripheral portion of the second inner housing 10b. That is, the connector 3 has a double waterproof structure with a packing 22 provided on the outer peripheral portion of the first outer housing 7a and a packing 32 provided on the outer peripheral portion of the second inner housing 10b.

  The second outer housing 10a is formed with a connection member operation hole 33 for operating the connection member 13 provided in the first connector portion 8 when the two connector portions 8 and 11 are fitted. .

  In the present embodiment, since the second outer housing 10a is formed of an insulating resin, an aluminum cylinder is formed on the inner peripheral surface on the other end side of the second outer housing 10a in order to improve its shielding performance and heat dissipation. A shield body 30 is provided. The cylindrical shield body 30 has a contact portion 30a that comes into contact with the outer periphery of the first outer housing 7a made of aluminum when the two connector portions 8 and 11 are fitted, and the first outer portion is interposed via the contact portion 30a. The housing 7a is thermally and electrically connected to improve the shielding performance and heat dissipation.

  Next, connection between the first joint terminals 6a to 6c and the second joint terminals 9a to 9c using the connector 3 according to the present embodiment will be described.

  When both the connector parts 8 and 11 are fitted, each of the second joint terminals 9a to 9c is inserted between each of the pair of first joint terminals 6a to 6c and the insulating members 12a to 12d. And by this insertion, while facing each one surface of 1st junction terminal 6a-6c and each one surface of 2nd junction terminal 9a-9c, it is 1st junction terminal 6a-6c, 2nd In this state, the joining terminals 9 a to 9 c and the insulating members 12 a to 12 d are alternately arranged. In this state, the connection member 13 is operated from the connection member operation hole 33, and the screw portion 19 of the connection member 13 is moved. When screwed into the screw hole 20 of the first outer housing 7a and tightened, the connecting member 13 is pushed into the bottom of the screw hole 20 while being rotated, and the elastic member 16 causes the first insulating member 12a, the first insulating member 12b, The first insulating member 12c and the second insulating member 12d are pressed in this order, and each of the contacts is pressed so as to be sandwiched between any two of the insulating members 12a to 12d. They are contacted in a state that each are insulated from each other. At this time, each of the first joint terminals 6a to 6c and each of the second joint terminals 9a to 9c are slightly bent by the press from the insulating members 12a to 12d and are brought into contact in a wide range.

  Next, an airtight holding structure for the second housing 10 and the cables 2a to 2c, which is a characteristic part of the present invention, will be described.

  The wire harness 1 is a part of the second housing 10, more specifically, a part of the second inner housing 10b, and a plurality of cables 2a to 2c are connected to the side to which the plurality of cables 2a to 2c are connected. A plurality of (three) cable insertion holes 34 for inserting 2c into the second housing 10 are provided with an airtight block 35 formed in parallel.

  By the way, between the 2nd inner housing 10b and the 2nd outer housing 10a, when fitting both the connector parts 8 and 11, airtightness is hold | maintained with the two packings 22 and 32, and also airtightness is hold | maintained also with the rubber boot 31. Therefore, the airtight block 35 is also airtightly provided to the second outer housing 10a.

  The cable insertion hole 34 formed in parallel with the airtight block 35 is formed to have a diameter larger than the diameter of the cables 2a to 2c, and a gap 36 of a predetermined distance is formed between the cables 2a to 2c and the airtight block 35. Is done. The gap 36 is a space for pouring the molten resin, which is the molten member 37, when the melting member 37, which will be described later, is melted, and has such a size that the molten resin can be actively poured. It is formed. Moreover, the cable insertion hole 34 is connected so that the adjacent cable insertion holes 34 may overlap. That is, in this embodiment, the gaps 36 formed around the adjacent cables 2a to 2c are communicated with each other.

  The airtight block 35 is formed with two closed portions 38 that close the space between the airtight block 35 and the cables 2a to 2c at two locations in the longitudinal direction of the cables 2a to 2c and define a part of the cable insertion hole 34. .

  In the present embodiment, as the blocking portion 38, the cables 2a to 2c are provided so as to keep the gap between the cables 2a to 2c and the airtight block 35 constant and to keep the gap 36 formed around the cables 2a to 2c at a predetermined distance. The clamping part 38a which clamps is formed. The clamping portion 38a is formed by reducing a part of the cable insertion hole 34 to a diameter substantially the same as the diameter of the cables 2a to 2c (a diameter slightly larger than the diameter of the cables 2a to 2c). In the present embodiment, two holding portions 38a are formed in the longitudinal direction of the cables 2a to 2c at the rear end portion of the hermetic block 35, and the molten resin is poured into the gap 36 between the both holding portions 38a.

  Further, the hermetic block 35 is formed by dividing the cables 2a to 2c arranged in parallel into two so as to sandwich the cables 2a to 2c arranged in parallel from the vertical direction (see FIGS. 1 and 3). This is because it becomes difficult to insert the cables 2a to 2c into the airtight block 35 (inside the cable insertion hole 34) by forming the clamping portion 38a. In the present embodiment, a part of the rear end portion (upper right side in FIG. 3A) of the airtight block 35 is divided so as to divide the two sandwiching portions 38a and are formed separately. Of the divided airtight block 35, the portion fixed to the second outer housing 10a side is divided into the first divided airtight block 35a, and the portion formed separately from the first divided airtight block 35a is the second divided airtight block. It is called 35b. Prior to the step of melting the melting member 37, the pair of divided hermetic blocks 35a and 35b are welded and integrated by ultrasonic welding while the cables 2a to 2c are sandwiched between the pair of divided hermetic blocks 35a and 35b. In the present embodiment, prior to integrating the two divided airtight blocks 35a and 35b, the metal member 50 is caulked and fixed to the outer periphery of the cables 2a to 2c, and the metal member 50 is fixed between the both sandwiched portions 38a. The two divided airtight blocks 35a and 35b are integrated with each other. Details of the metal member 50 will be described later.

  The hermetic block 35 is a portion into which a melting member 37 made of resin is inserted, and the melting member 37 is inserted into the cable insertion hole 34 between both the sandwiching portions 38 a so as to press against the metal member 50. An insertion portion 39 is formed. That is, the insertion portion 39 is formed at a position where the melting member 37 can be inserted into the cable insertion hole 34 between the both sandwiching portions 38 a so as to press against the metal member 50 in the airtight block 35. The insertion part 39 consists of a hole penetrating the second divided airtight block 35b in a direction perpendicular to the longitudinal direction of the cables 2a to 2c (up and down direction in FIG. 2).

  In the present embodiment, since the three cables 2a to 2c are arranged in parallel, a total of three insertion portions 39 are formed, one above each of the cables 2a to 2c (upward in FIGS. 2 and 3). However, the number of insertion portions 39 may be one or two, or four or more. In the present embodiment, the three insertion portions 39 are formed at the same position in the longitudinal direction of the cables 2a to 2c. However, the insertion portions 39 are formed at different positions in the longitudinal direction of the cables 2a to 2c. Alternatively, for example, a plurality of insertion portions 39 may be formed in the longitudinal direction above the cable 2a (upward in FIGS. 2 and 3). The insertion portion 39 is formed at a position where the melting member 37 does not interfere with the diameter-enlarged portion 50 b of the metal member 50 described later when the melting member 37 is inserted into the insertion hole 39.

  The melting member 37 is formed in a pin shape including a columnar shaft portion 37b inserted into the insertion portion 39 and a flange-shaped head portion 37a formed at the rear end portion of the shaft portion 37b.

  The melting member 37 is pressed against the metal member 50 while being vibrated with a horn in a state where the tip of the shaft portion 37b is inserted into the insertion portion 39 and a horn (not shown) is in contact with the head portion 37a. Thus, the tip portion of the shaft portion 37b is melted by the heat generated between the tip portion of the shaft portion 37b and the metal member 50.

  As the resin used for the melting member 37, it is desirable to use the same resin as the hermetic block 35. For example, PPS (polyphenylene sulfide) resin, PPA (polyphthalamide) resin, PA (polyamide) resin, PBT (polybutylene terephthalate) It is good to use.

  Since the head 37a of the melting member 37 is a part that contacts the horn when the melting member 37 is melted, heat is generated between the horn and the head 37a when the melting member 37 is melted, In order to prevent melting, it is formed in a size (area) that can ensure a sufficient contact area with the horn.

  The length of the shaft portion 37b of the melting member 37 is set so that the amount of the molten resin to be melted is such that the gap 36 between the both sandwiching portions 38a can be completely filled or slightly larger. In the present embodiment, three insertion portions 39 are formed and three melting members 37 are used. These three melting members 37 are formed to have substantially the same length. In order to supply the molten resin evenly to the gaps 36, it is desirable to melt the three melting members 37 at substantially the same speed, but by forming the three melting members 37 to substantially the same length, This is because it is possible to realize melting of the three melting members 37 at substantially the same speed with a simple configuration in which the three melting members 37 are pressed simultaneously. In addition, what is necessary is just to press with the common one horn, for example, in order to press the three fusion | melting members 37 simultaneously.

  In the present embodiment, the melting member 37 is formed in a pin shape, but the shape of the melting member 37 is not limited to this, and for example, the melting member 37 may be formed in a plate shape. Further, the shaft portion 37b of the melting member 37 may be formed in a shape (tip tapered shape) whose tip is gradually tapered so that the tip is easily melted.

  Now, in the wire harness 1, the metal member 50 which protrudes in the radial direction outer side of the cables 2a-2c is provided in the outer periphery of the cables 2a-2c between both the clamping parts 38a. The metal member 50 is fastened and fixed to the cables 2a to 2c, and is firmly fixed so as not to be displaced with respect to the cables 2a to 2c.

  The metal member 50 has a longitudinal direction of the cables 2a to 2c in the pulling or pushing force of the cables 2a to 2c with respect to the second housing 10 (left and right direction in FIG. 3B, hereinafter, in order to simplify the explanation, FIG. The movement in the front-rear direction is restricted by both clamping portions 38a. The metal member 50 also serves as a pressing portion for pressing the tip end portion of the shaft portion 37 a of the melting member 37 inserted into the cable insertion hole 34 via the insertion portion 39.

  The metal member 50 is formed shorter than the length of the cable insertion hole 34 defined by the both sandwiching portions 38a, and the exposed portions 51 that are not covered by the metal member 50 are formed in the cables 2a to 2c between the both sandwiching portions 38a. Is done. This is because when the entire cable 2a to 2c between the both sandwiching portions 38a is covered with the metal member 50, the molten resin that has flowed into the gap between the both sandwiching portions 38a does not directly contact the cables 2a to 2c. This is because it is not preferable. That is, by forming the exposed portion 51, the molten resin and the cables 2 a to 2 c (sheath 5) are brought into close contact with each other at the exposed portion 51, and the airtightness between the molten resin and the cables 2 a to 2 c is sufficiently maintained. It becomes possible.

  In the present embodiment, the metal member 50 includes a cylindrical tube portion 50a provided on the outer periphery of the sheath 5 of the cables 2a to 2c, and a diameter-enlarged portion obtained by bending the rear end portion of the tube portion 50a and expanding the diameter in a flange shape. And 50b.

  The cylindrical portion 50a of the metal member 50 is formed at a position facing the insertion portion 39, and the tip of the shaft portion 37a of the melting member 37 inserted into the insertion portion 39 is pressed against the cylindrical portion 50a.

  In the present embodiment, the metal member 50 is disposed such that the enlarged diameter portion 50b abuts on the rear clamping portion 38a. When the molten resin is poured into the gap 36 between the holding portions 38a, the metal member 50 is pulled backward so as to pull out the cables 2a to 2c from the second housing 10, and the expanded diameter portion 50b of the metal member 50 is held behind. By pouring the molten resin in a state of being in contact with the portion 38a, the enlarged diameter portion 50b is fixed in a state of being in contact with the rear clamping portion 38a.

  By configuring in this way, avoiding a situation in which the hermeticity is insufficiently maintained because the molten resin does not flow between the rear clamping portion 38a and the enlarged diameter portion 50b of the metal member 50. Can do. That is, since the rear clamping portion 38a and the enlarged diameter portion 50b of the metal member 50 can be fixed in a tightly adhered state, it is possible to maintain sufficient airtightness.

  In the present embodiment, the metal member 50 has a shape in which the enlarged diameter portion 50b is formed behind the cylindrical portion 50a in order to bring the metal member 50 into contact with the rear clamping portion 38a. The shape is not limited to this, and may be any shape, for example, by omitting the enlarged diameter portion 50b and forming the tubular portion 50a to be thick overall.

  Next, a method for manufacturing the wire harness 1 will be described.

  When manufacturing the wire harness 1, first, the metal members 50 are respectively crimped and fixed to the cables 2a to 2c. Thereafter, the end portions of the cables 2a to 2c provided with the second connection terminals 9a to 9c are inserted into the cable insertion holes 34 of the first divided hermetic block 35a, and the second inner housing 10b is used to insert the end portions of the cables 2a to 2c into the second outer housing 10a. The cables 2a to 2c are aligned and held at a predetermined interval. At this time, the cables 2a to 2c are arranged so that the metal member 50 is positioned between the both sandwiching portions 38a.

  Thereafter, the second divided airtight block 35b is ultrasonically welded to the first divided airtight block 35a, and the pair of divided airtight blocks 35a and 35b are integrated, and the cables 2a to 2c are held by the holding portion 38a, And the metal member 50 is accommodated between both the clamping parts 38a.

  At this time, the horn is brought into contact with the second divided hermetic block 35b, and the second divided hermetic block 35a is pressed by the horn while the second divided hermetic block 35b is vibrated, so that the pair of divided hermetic blocks 35a and 35b are pressed. Although it is welded, if the second divided airtight block 35b is pressed too much toward the first divided airtight block 35a at the time of ultrasonic welding, the holding portion 38a is pressed by the sheath 5, and the contact portion between the holding portion 38a and the sheath 5 is pressed. Heat may be generated and the sheath 5 may melt. Therefore, in the present embodiment, the pressing by the horn is terminated when the clamping portion 38a comes into close contact with the sheath 5 to the extent that the molten resin does not leak.

  After the pair of divided airtight blocks 35a and 35b are integrated by ultrasonic welding, the melting member 37 is inserted into the cable insertion hole 34 through the insertion portion 39, and the horn is brought into contact with the head portion 37a of the melting member 37. The molten member 37 is pressed toward the cylindrical portion 50a side of the metal member 50 while being vibrated. At this time, the cables 2 a to 2 c are pulled backward so as to be pulled out from the second housing 10, and the expanded diameter portion 50 b of the metal member 50 is brought into contact with the rear clamping portion 38 a. Moreover, when pressing the melting member 37, the three melting members 37 are simultaneously pressed with a horn.

  When the tip of the shaft portion 37b of the melting member 37 contacts the tube portion 50a of the metal member 50, heat is generated between the tip of the shaft portion 37b and the tube portion 50a of the metal member 50, and the shaft portion 37b of the melt member 37 is obtained. The tip of the melts. The molten resin in which the tip portion of the shaft portion 37b of the melting member 37 is melted is poured into a gap 36 (gap 36 between the both holding portions 38) formed around the cables 2a to 2c.

  When the melting member 37 is further pressed while being vibrated, the tip end portion of the shaft portion 37b is sequentially melted and poured into the gap 36, and the gap 36 between the both sandwiching portions 38 is completely filled with the molten resin. At this time, the head portion 37 a of the melting member 37 abuts on the periphery of the insertion portion 39, and the head portion 37 a is also welded to the airtight block 35.

  When the excitation by the horn is stopped in this state, the molten resin covering the periphery of the cables 2a to 2c is hardened, and the molten member 37 and the cables 2a to 2c are separated from each other at the exposed portion 51 not covered with the metal member 50. Adhere closely. Moreover, the molten member 37 and the airtight block 35 are integrated by the molten resin solidifying. The head portion 37a of the melting member 37 protruding from the airtight block 35 may be scraped off or left as it is.

  As described above, an airtight holding structure between the second housing 10 and the cables 2a to 2c is formed, and the wire harness 1 is obtained. In addition, since the assembly procedure of the 1st connector part 8 belongs to a prior art, description is abbreviate | omitted here.

  As described above, in the wire harness 1 according to the present embodiment, the cable 2a between the both sandwiching portions 38a in order to restrict the longitudinal movement of the cables 2a to 2c due to the pulling or pushing force of the cables 2a to 2c. The metal member 50 protruding outward in the radial direction of the cables 2a to 2c is fixed by caulking to the outer periphery of the cable 2a to 2c. 34, and the molten member 37 is pressed against the metal member 50 while being vibrated, thereby melting the tip of the molten member 37 in contact with the metal member 50, and the molten resin as the molten member 37 is melted. The airtight block 35 and the cables 2a to 2c are kept airtight by pouring into the gap 36 between the both sandwiching portions 38a and covering the periphery of the cables 2a to 2c with molten resin. There.

  Although the molten resin obtained by melting the melting member 37 is poured into the gap between the cables 2a to 2c and the airtight block 35, the second housing 10 and the cables 2a to 2c can be kept airtight. In this state, the strength of the airtight holding structure is not sufficient, and when a pulling force or pushing force is applied to the cables 2a to 2c, peeling occurs at the interface between the cables 2a to 2c and the molten resin. The airtight holding structure may be destroyed. When the airtight holding structure is broken, water or the like enters the second housing 10 to cause a failure, and the contact portions of the cables 2a to 2c move in the front-rear direction with respect to the second housing 10. Problems such as wear may occur, and it is necessary to sufficiently ensure the strength of the airtight holding structure in order to prevent the occurrence of such problems.

  In particular, when the wire harness 1 is mounted on a vehicle, vibrations in various directions are applied to the wire harness 1, and at this time, vibrations in the front-rear direction (longitudinal direction) with respect to the cables 2a to 2c may also be applied. The vibration in the front-rear direction with respect to the cables 2a to 2c generates the above-described pulling force and pushing force, and also causes the airtight holding structure to be broken. Therefore, in the vehicle wire harness 1, the pulling force of the cables 2a to 2c, or Measures against indentation force are very important.

  In the present embodiment, the metal member 50 protruding outward in the radial direction of the cables 2a to 2c is fixed by crimping to the outer periphery of the cables 2a to 2c between the both sandwiching portions 38a, and both movements of the metal member 50 are clamped. The movement of the cables 2a to 2c in the longitudinal direction is regulated by regulating the portion 38a. As a result, even if the cables 2a to 2c are pulled or pushed, the metal member 50 is caught by the airtight block 35 (the clamping portion 38a), so the relationship of the cables 2a to 2c with respect to the airtight block 35 is strengthened. It is possible to improve the strength of the airtight holding structure. Therefore, even when a pulling force or a pushing force is applied to the cables 2a to 2c, it is possible to prevent the airtight holding structure from being destroyed, and the second housing 10 and the cables 2a to 2c are sufficiently sealed. It becomes possible to hold.

  In the wire harness 1, the metal member 50 also serves as a pressing portion for pressing the melting member 37, and the melting member 37 is pressed against the metal member 50 to be melted.

  For example, the melting member 37 may be pressed against the hermetic block 35 and melted. In this case, the melting member 37 has a melting temperature lower than that of the hermetic block 35 in order to prevent the hermetic block 35 from melting. It is necessary to provide a protective member such as a metal or the like at a position where the melting member 37 of the hermetic block 35 is pressed or formed of resin.

  In the wire harness 1, since the melting member 37 is pressed against the metal member 50 and melted, the selection range of the resin used for the melting member 37 and the hermetic block 35 is expanded, and the melting member 37 and the hermetic block 35 are made of the same material, or It can also be formed of a material having a close melting temperature. In particular, by forming the melting member 37 and the airtight block 35 from the same material, the molten member 37 and the airtight block 35 can be more firmly integrated when the molten resin is solidified, and the airtightness can be further improved. It becomes possible. Moreover, since it is not necessary to separately provide a protective member for protecting the airtight block 35, the cost can be suppressed.

  Moreover, in the wire harness 1, since the melting member 37 inserted from the insertion part 39 is pressed against the metal member 50, the melting member 37 does not contact the sheath 5 of the cables 2a to 2c, and melts the sheath 5. Without making it possible, the airtightness between the second housing 10 and the cables 2a to 2c can be sufficiently maintained.

  Furthermore, in the wire harness 1, since the adjacent cable insertion holes 34 communicate with each other so as to overlap in the wire harness 1 (see FIG. 2), the distance between the cables 2a to 2c can be reduced, and the pitch of the cables 2a to 2c can be reduced. This makes it possible to further reduce the size of the wire harness 1.

  Moreover, in the wire harness 1, the metal member 50 is formed shorter than the length of the cable insertion hole 34 defined between the both sandwiching portions 38a, and the metal members 50 are connected to the cables 2a to 2c between the both sandwiching portions 38a. An exposed portion 51 that is not covered is formed. Thereby, it becomes possible to cover the circumference | surroundings of cable 2a-2c with a molten resin in the exposed part 51 without a gap, the adhesiveness between the fusion | melting member 37 and the cables 2a-2c can be improved, and airtightness can be improved more.

  Furthermore, in the wire harness 1, when the molten resin is poured into the gap 36 between the both sandwiching portions 38 a, the cables 2 a to 2 c are pulled backward so as to be pulled out from the second housing 10, and the metal member 50 is moved to the rear sandwiching portion 38 a. The molten resin is poured in the contacted state. As a result, the metal member 50 can be fixed in a state of being in contact with the rear clamping portion 38a, and the cable 2a to 2c is subjected to a pulling force that has a large influence on the airtight holding structure. The movement in the pulling direction of 2a to 2c can be restricted, and the airtight holding structure can be prevented from being broken. Therefore, it becomes possible to maintain sufficient airtightness between the second housing 10 and the cables 2a to 2c.

  Moreover, in the wire harness 1, since the melting temperature of the melting member 37 is set lower than the melting temperature of the airtight block 35, when the melting member 37 is melted, the airtight block 35 is melted and a problem occurs. Can be prevented.

  Furthermore, in the wire harness 1, since the clamping part 38a which clamps the cables 2a to 2c is formed in the airtight block 35 as the closing part 38, the gap 36 formed around the cables 2a to 2c is held at a predetermined distance. Therefore, the molten resin can be reliably supplied around the cables 2a to 2c. That is, problems such as a part of the cables 2a to 2c not being covered with the molten resin do not occur.

  Moreover, in the wire harness 1, since the airtight block 35 is formed by dividing the cables 2a to 2c arranged in parallel so as to be sandwiched from above and below, the cables 2a to 2c are placed in the second housing 10 (cable insertion The metal member 50 can be easily inserted into the cable insertion hole 34 between the holding portions 38a.

  Furthermore, in the wire harness 1, the three melting members 37 are pressed at the same time, and the two melting members 37 are melted at substantially the same speed, so that the molten resin can be supplied uniformly to the gap 36. .

  The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above embodiment, the airtight block 35 is a part of the second inner housing 10b. However, the present invention is not limited to this, and the airtight block 35 may be formed to be a part of the second outer housing 10a. The airtight block 35 may be formed separately from the second housing 10, and the airtight block 35 formed separately may be provided airtight with respect to the second housing 10.

  Furthermore, in the said embodiment, when ultrasonically welding the 2nd division | segmentation airtight block 35b to the 1st division | segmentation airtight block 35a, the cable 2a-to the extent that the airtight block 35 does not leak out by the clamping part 38a. When the horn is in close contact with the sheath 5 of 2c, the pressing by the horn is finished. However, in order to completely prevent the sheath 5 from melting, a metal or A protective member made of a resin having a melting temperature higher than that of the hermetic block 35 may be provided so that the hermetic block 35 and the sheath 5 do not directly contact each other.

  Further, in the above embodiment, when the gap between the two sandwiching portions 38a is completely filled with the molten resin, the excitation / pressurization of the melting member 37 by the horn is stopped, but the gap 36 between the both sandwiching portions 38a is stopped. Is completely filled with the molten resin, and then the molten member 37 is pressed and melted while being vibrated with a horn, thereby increasing the internal pressure of the molten resin filled in the gap 36 and filling the gap 36. You may make it press the sheath 5 (sheath 5 of the part of the exposed part 51) of the cables 2a-2c with the molten resin (molten resin which flowed into the clearance gap 36) made. Thereby, it becomes possible to improve airtightness more.

  Furthermore, in the said embodiment, although the two clamping parts 38a were formed as the obstruction | occlusion part 38 and molten resin was poured into the clearance gap 36 between both the clamping parts 38a, it is not restricted to this, 2nd junction terminal 9a- You may make it abbreviate | omit the clamping part 38a by the side of 9c. In this case, since the molten resin flows into the second joining terminals 9a to 9c, the inner pressure of the molten resin cannot be increased and the sheath 5 cannot be compressed, but the cable 2a to 2c and the airtight block 35 are not compressed. Airtightness can be sufficiently maintained.

  In the above embodiment, the case where the gap 36 between the both sandwiching portions 38a is completely filled with the molten resin has been described. However, the present invention is not limited to this, and the gap 36 is not completely filled. Even if there is a slight gap, it is included in the scope of the technical idea of the present invention.

  Moreover, in the said embodiment, although the airtight holding structure between the 2nd housing 10 and the cables 2a-2c in the 2nd connector part 11 was demonstrated, when a cable is connected to the 1st connector part 8, The present invention can also be applied to an airtight holding structure between the first housing 7 and the cable in the one connector portion 8.

  Moreover, in the said embodiment, although the center conductor 4 in cable 2a-2c was substantially circular shape by cross-sectional view, even if it is other shapes, for example, flat shape, it is possible to apply this invention. is there.

DESCRIPTION OF SYMBOLS 1 Wire harness 2a-2c Cable 3 Connector 4 Center conductor 5 Sheath 6a-6c 1st junction terminal 7 1st housing 8 1st connector part 9a-9c 2nd junction terminal 10 2nd housing 11 2nd connector part 34 Cable insertion hole 35 Airtight block 36 Gap 37 Melting member 38 Closure part 38a Clamping part 39 Insertion part 50 Metal member 51 Exposed part

Claims (9)

In a wire harness comprising a plurality of cables arranged in parallel and a connector having a housing to which ends of the plurality of cables are connected,
The housing has an airtight block in which a plurality of cable insertion holes for inserting the plurality of cables into the housing are formed in parallel on a side to which the plurality of cables are connected,
Each cable insertion hole is formed so as to have a gap of a predetermined distance between the cable and the airtight block, and communicates so that the adjacent cable insertion holes overlap,
The airtight block is
Two closed portions that block between the airtight block and the cable at two locations in the longitudinal direction of the cable, and define a part of the cable insertion hole;
Forming an insertion portion that is a portion into which a melting member made of resin is inserted,
In order to restrict the movement of the cable in the longitudinal direction due to the pulling or pushing force of the cable with respect to the housing, the cable is fixed to the outer periphery of the cable between the closed portions so as to protrude outward in the radial direction of the cable. A metal member
The insertion part is formed at a position where the melting member can be inserted into the cable insertion hole between the blocking parts so as to press against the metal member in the hermetic block,
The molten member is inserted into the insertion portion and pressed against the metal member while oscillating the molten member, whereby the tip of the molten member that contacts the metal member is melted, and the melted molten member The wire harness is characterized in that the hermetic block and the cable are kept airtight by pouring the molten resin into the gap between the closed portions and covering the periphery of the cable with the molten resin. .   The metal member is formed to be shorter than the length of the cable insertion hole defined between the closed portions, and an exposed portion that is not covered with the metal member is formed in the cable between the closed portions. The wire harness according to claim 1.   When pouring the molten resin into the gap between the closed portions, the cable is pulled backward so as to be pulled out of the housing, and the molten resin is placed in a state where the metal member is in contact with the closed closed portion. The wire harness according to claim 1 or 2, wherein the wire harness is poured. The airtight block is made of resin,
The wire harness according to any one of claims 1 to 3, wherein the melting member and the hermetic block are made of the same material or a material having a melting temperature close to each other.   The wire harness according to any one of claims 1 to 4, wherein the closing portion includes a holding portion that holds the cable so as to hold the gap formed around the cable at a predetermined distance. The airtight block is
It consists of a pair of split airtight blocks made of resin divided into two so as to sandwich the plurality of cables arranged in parallel from above and below
The wire harness according to any one of claims 1 to 5, wherein the pair of divided airtight blocks are welded and integrated by ultrasonic welding in a state where the plurality of cables are sandwiched between the pair of both airtight blocks.   After completely filling the gap between the closed portions with the molten resin, the molten member is pressed and melted to compress the cable with the molten resin that has flowed into the gap between the holding portions. The wire harness according to any one of claims 1 to 6, wherein the wire harness is formed. A plurality of the insertion portions are formed, and a melting member is inserted into each of the plurality of insertion portions,
The wire harness according to claim 1, wherein the plurality of melting members inserted into the plurality of insertion portions are pressed simultaneously. In a method for manufacturing a wire harness comprising a plurality of cables arranged in parallel and a connector having a housing to which ends of the plurality of cables are connected,
The housing has an airtight block in which a plurality of cable insertion holes for inserting the plurality of cables into the housing are formed in parallel on a side to which the plurality of cables are connected,
Each cable insertion hole is formed so as to have a gap of a predetermined distance between the cable and the airtight block, and communicates so that the adjacent cable insertion holes overlap,
The airtight block is
Two closed portions that block between the airtight block and the cable at two locations in the longitudinal direction of the cable, and define a part of the cable insertion hole;
Forming an insertion portion that is a portion into which a melting member made of resin is inserted,
In order to restrict the movement of the cable in the longitudinal direction due to the pulling or pushing force of the cable with respect to the housing, the cable is fixed to the outer periphery of the cable between the closed portions so as to protrude outward in the radial direction of the cable. A metal member
The insertion part is formed at a position where the melting member can be inserted into the cable insertion hole between the blocking parts so as to press against the metal member in the hermetic block,
The molten member is inserted into the insertion portion and pressed against the metal member while oscillating the molten member, whereby the tip of the molten member that contacts the metal member is melted, and the melted molten member The wire harness is characterized in that the hermetic block and the cable are kept airtight by pouring the molten resin into the gap between the closed portions and covering the periphery of the cable with the molten resin. Manufacturing method.

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