JP5435999B2 - Shield processing structure and shield processing method for shielded wire - Google Patents

Description

  The present invention relates to a shield processing structure and a shield processing method for a shielded wire formed by ultrasonically welding a shielded wire and a ground wire using a pair of resin members.

  As a conventional shield processing structure by ultrasonic welding, there is one disclosed in Patent Document 1. The shield processing structure includes a shielded electric wire, a ground wire, and a pair of resin members in which grooves having an arcuate cross section are formed on the joint surface. More specifically, a shielded electric wire in which the outer periphery of the core wire is covered with a braided wire is placed in the groove of one resin member, and placed on the shielded electric wire so as to cross the ground wire. The other resin member is covered from above. Thus, it is set as an ultrasonic vibration set state in the state which pinched | interposed the shield electric wire and the earth wire with a pair of resin member.

  When ultrasonic vibration is applied with an ultrasonic horn while a compressive force is applied between a pair of resin members in this ultrasonic vibration set state, the insulation sheath of the shielded wire and ground wire together with each resin member generates heat due to vibration energy and melts. The core wire of the ground wire and the braided wire of the shield wire are electrically contacted. Subsequently, after the ultrasonic vibration is finished, the melted portion is solidified, so that the joint surfaces of the pair of resin members are welded together, and the pair of resin members, the shielded electric wire, and the ground wire are fixed.

  According to this shield processing structure, it is not necessary to peel off the insulation sheath of the shielded wire or ground wire, and ultrasonic vibration is performed by assembling the lower resin member, shield wire, ground wire, and upper resin member in this order. Therefore, the number of processes is small, and there is no complicated manual work, and automation is possible.

JP 2005-32675 A

  By the way, in the shielded electric wire, an insulating endothelium is formed between the core wire and the braided wire, and the distance between the core wire and the braided wire is secured by the thickness of the insulating endothelium. However, according to the structure of Patent Document 1, when ultrasonic vibration is applied, the ground wire is sandwiched between the resin wires in a state where the shield wire is overlapped, and the ground wire of the overlapped portion is sandwiched between the resin wires. The bottom of the groove is in close contact. For this reason, vibration energy tends to concentrate on the part where the ground wire and the shielded electric wire overlap through the resin member. When the vibration energy is excessively concentrated in this way, for example, the insulating endothelium of the shielded wire is easily softened or melted. When the insulating endothelium is softened or melted, the braided wire sinks into the insulating endothelium due to the pressure applied to the shielded electric wire, and the distance between the core wire and the braided wire is shortened, which may reduce the insulating performance of the shielded electric wire.

  The present invention stably obtains an electrical connection state between a braided wire of a shielded wire and a core wire of a ground wire, and prevents a decrease in insulation performance of the shielded wire, and a shield processing structure of the shielded wire. It is an object to provide a shield processing method.

In order to solve the above-mentioned problems, the present invention crosses the shielded electric wire having an insulating endothelium covering the outer periphery of the core wire, a braided wire covering the outer periphery of the insulating endothelium, and an insulating outer sheath covering the outer periphery of the braided wire. In the shield processing structure of the shielded electric wire, the shielded electric wire and the pair of resin members which are welded by sandwiching the shielded electric wire and the ground wire, each of the pair of resin members accommodates the shielded electric wire. A joint where a pair of resin members are joined to each other is formed at the groove edges on both sides of each shielded wire groove, and a part of the braided wire of the shielded wire moves to this joint by only at least one of the joints, insulating outer cover has not been embedded in a state in which the core wire of the ground wire is coated with a braided wire which is melted removed melted removed is electrically connected It is characterized in.

  According to this shield processing structure, the contact portion between the braided wire from which the insulation sheath has been removed by melting and the core wire of the ground wire from which the coating has been removed by melting is positioned in the direction to close the pair of resin members with respect to the core wire of the shielded electric wire. Accordingly, excessive pressure and vibration energy are not transmitted to the insulating endothelium of the shielded wire during ultrasonic excitation, and softening and melting of the insulating endothelium can be prevented. Thereby, since sufficient distance of the core wire and braided wire in a shielded electric wire can be ensured, the fall of the insulation performance of a shielded electric wire can be prevented. Further, since the braided wire of the shielded wire and the core wire of the ground wire are embedded in the joint portion of each resin member, the electrical connection state between the braided wire and the core wire of the ground wire can be stably maintained. .

In this case, the shielded wire and the ground wire may be arranged adjacent to each other in parallel .

  According to this shield processing structure, even if the shielded electric wire and the ground wire are arranged side by side, the contact portion between the braided wire from which the insulation sheath has been removed by melting and the core wire of the ground wire from which the coating has been removed by melting is a resin member. Since it is embed | buried under the junction part pinched | interposed into, the electrical connection state of a braided wire and a core wire can be maintained stably. Also in this structure, when ultrasonic vibration is applied, the connection portion between the braided wire and the core wire of the ground wire is not positioned in the direction in which the pair of resin members are closed with respect to the core wire of the shielded wire. Softening and melting of the insulating endothelium can be prevented, and a sufficient distance between the core wire and the braided wire in the shielded electric wire can be secured.

Further, as a method of obtaining the above shield processing structure , a shielded electric wire having an insulating inner skin covering the outer periphery of the core wire, a braided wire covering the outer periphery of the insulating inner wire, and an insulating outer skin covering the outer periphery of the braided wire, and a covered ground Wire and a pair of resin members that sandwich the shielded electric wire and the ground wire, and interpose the shielded electric wire and the ground wire between the pair of resin members so that a compressive force is applied between the resin members. while by ultrasonic vibration, the cover portions of the insulating jacket and the grounding wire to melt removed, there is electrical contact methods Ru was a core wire of the braided wire and the ground wire. In this case, the joint surface where the resin members are joined to each other is provided with a groove space in which the shielded electric wire is accommodated, and the space width in the short direction of the portion where at least the ground wire in the longitudinal direction of the groove space intersects, The shield wire is larger than the outer diameter of the core wire of the shielded wire and smaller than the inner diameter of the insulation sheath. After the ground wire is arranged on the joint surface of one resin member, a part of the shield wire overlaps the ground wire. as described above, the shielded electric wire is disposed at a position above the groove space, in this state, you ultrasonic vibration pressed covered with other resin member.

  According to this shield processing method, since the pair of resin members having a groove space formed in a predetermined size according to the size of the cross-sectional structure of the shielded wire is used, the shielded wire is subjected to ultrasonic vibration. At this time, a part of the insulating sheath including the braided wire is sandwiched between the joint surfaces of the pair of resin members, and vibration energy is concentrated on this portion. When the vibration energy is concentrated in this way, the sandwiched portion of the shielded wire is deformed, and a part of the insulating sheath including the braided wire moves toward the gap between the joint surfaces of the resin member. A part of the shielded wire including the braided wire moved to the gap between the joint surfaces is given vibration energy to melt and remove the insulation sheath, and also covers a part of the ground wire arranged in the gap. Is melted away. As a result, the braided wire and the core wire of the ground wire are electrically contacted and embedded between the bonded surfaces of the welded resin member, so that an electrical contact state can be stably obtained.

  On the other hand, a portion of the shielded wire that is not sandwiched between the joint surfaces of the pair of resin members is accommodated in the groove space of the resin member. At this time, the ground wire is arranged under the shielded wire so as to cross the shielded wire, but a groove space of a predetermined size is provided in one resin member on which the ground wire is placed. Therefore, when the shielded wire is pressed against the other resin member, the shield wire moves along with the ground wire into the groove space of the one resin member except for the portion sandwiched between the joint surfaces. Half is accommodated in the groove space of the other resin member. Thereby, since vibration energy concentrates in the part pinched | interposed between the joint surfaces of a pair of resin member, the shielded electric wire accommodated in the groove space can suppress the softening and melting of the insulating endothelium. Therefore, the shielded electric wire can sufficiently secure the distance between the core wire and the braided wire, and can prevent the insulation performance of the shielded electric wire from deteriorating.

In place of the above method SL, it is also possible to adopt the following method. That is, the joint surface where the resin members are joined is provided with a first groove having a circular arc cross section in which the shielded electric wire is accommodated and along the first groove, and the groove depth is greater than the first groove. And a second groove having a small cross-sectional arc shape, each of which has a groove width larger than the outer diameter of the core wire of the shielded wire, The groove width of the second groove is formed so as to be able to accommodate the core wire of the ground wire, the shielded electric wire is disposed along the first groove of one resin member, and the second groove In the state where the ground wire is arranged along the groove, the other resin member is covered and pressed and subjected to ultrasonic vibration.

  According to this shield processing method, when ultrasonic vibration is applied, the groove edge of the first groove, that is, the boundary portion with the second groove is in contact with the shielded electric wire, and a part of the insulating sheath including the braided wire Deforms and moves into the second groove. As a result, the shield wire is mixed with the ground wire in the second groove and the density becomes high, so that the vibration energy is concentrated, the insulation sheath of the shield wire is melted and removed, the ground wire coating is melted and removed, and the braided wire and The core wire of the ground wire is in electrical contact. Furthermore, when the second groove is welded by vibration energy, the braided wire and the core wire of the ground wire are embedded between the second grooves. For this reason, the braided wire and the core wire of the ground wire can stably obtain an electrical contact state. On the other hand, since the other part of the shielded electric wire is accommodated in the first groove, excessive vibration energy is not applied, and the insulating endothelium of the shielded electric wire can be prevented from being softened or melted. The deterioration of the insulation performance can be prevented.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to acquire an electrical connection state stably between the braided wire of a shielded electric wire and the core wire of an earth wire, the fall of the insulation performance of a shielded electric wire can be prevented.

It is a perspective view which shows the 1st Embodiment of this invention and shows the external appearance of the shield part of a shielded electric wire and a ground wire. It is a perspective view which shows the 1st Embodiment of this invention and shows a pair of resin member. It is sectional drawing which shows the 1st Embodiment of this invention and shows the arrangement | positioning relationship of each member in the AA arrow direction of FIG. 1 when ultrasonically exciting. It is sectional drawing which shows the 1st Embodiment of this invention and shows the shield processing structure of the state by which the resin member was welded in the case of ultrasonic vibration. It is a figure which shows the 1st Embodiment of this invention and shows the other example of arrangement | positioning of a shield wire and a ground wire in the case of ultrasonic vibration. It is a perspective view which shows the 1st Embodiment of this invention and shows the other form of a pair of resin member. It is a perspective view which shows the 2nd Embodiment of this invention and shows the external appearance of the shield part to which the shield process structure was applied to the junction part of a shield electric wire and a ground wire. It is a figure which shows the 2nd Embodiment of this invention and shows the side surface and joining surface of a resin member. FIG. 6 is a cross-sectional view showing a second embodiment of the present invention and enlarging a part of a shield processing structure in a state where a resin member is welded during ultrasonic vibration. It is sectional drawing of the shielded electric wire after the forming which shows the 3rd Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
1 to 6 show a first embodiment of the present invention, FIG. 1 is a perspective view showing an appearance of a joint portion between a shielded wire and a ground wire, and FIG. 2 is a perspective view showing an example of a pair of resin members. 3 is a cross-sectional view showing the positional relationship of each member in the direction of arrows AA in FIG. 1 when ultrasonically vibrating, and FIG. 4 is a cross-sectional view showing a shield processing structure in which a pair of resin members are welded FIG. 5 is a view showing another arrangement example of the shielded electric wire and the ground wire, and FIG. 6 is a perspective view showing another form of the pair of resin members.

  As shown in FIG. 1, the shield processing structure of the present embodiment includes a shielded electric wire 1, a ground wire 3, and a pair of resin members 5 a and 5 b, and includes a braided wire 11 and a ground wire 3 of the shielded electric wire 1. The core wire 15 is electrically connected using a pair of resin members 5a and 5b.

  As shown in FIGS. 1 and 2, the shielded electric wire 1 is a coaxial cable connected to, for example, an antenna mounted on a vehicle, and an insulating endothelium 9 covering the outer periphery of one core wire 7, It comprises a conductor braided wire 11 covering the outer periphery of the insulating endothelium 9 and an insulating sheath 13 covering the outer periphery of the braided wire 11. The ground wire 3 includes a single core wire 15 and an insulating sheath 17 made of a resin material that covers the outer periphery of the core wire 15. The insulating inner skin 9 and the insulating outer skins 13 and 17 are formed of an insulating material made of a synthetic resin, and the core wires 7 and 15 are formed of an electric conductor like the braided wire 11.

  As shown in FIG. 2, the pair of resin members 5a and 5b are synthetic resin blocks having the same shape, and the shielded electric wire 1 and the ground wire 3 are accommodated on the joint surfaces of the resin members 5a and 5b. A shield wire groove 21 and a ground wire groove 23 are respectively formed. The shield wire groove 21 and the ground wire groove 23 are arranged in directions orthogonal to each other. The shielded electric wire groove 21 is divided into a total of three locations, one at the central portion of the resin member 5 and two on both sides sandwiching the resin member 5, and the two grooves on both sides sandwiching the central portion are, for example, shielded It is a semicircular arc-shaped groove whose radius is the outer radius of the outer sheath 13 of the electric wire 1. The groove at the center is formed such that the groove width L of the opening at the groove edge is smaller than the groove width L ′ of the two grooves on both sides. The ground wire groove 23 is formed separately at two locations on both sides of the central portion of the shielded wire groove 21. For example, the ground wire groove 23 is a semicircular groove having a radius of the outer shape of the ground wire 3.

  The resin members 5a and 5b are respectively provided with ground wire holding projections 25a and 25b at positions where the shield wire groove 21 and the ground wire groove 23 intersect, that is, on both sides of the central portion of the shield wire groove 21. It has been. The ground wire holding projections 25 a and 25 b are arranged so as to cross the ground wire groove 23 when the ground wire groove 23 is viewed from the outside of the resin member 5 in the groove direction.

  Furthermore, annular resin inflow portions 27 are formed on the joint surfaces of the resin members 5a and 5b so as to surround the outer positions of the ground wire holding projections 25a and 25b. The resin inflow portion 27 is for the molten resin to flow in from the ground wire holding projections 25a, 25b and the like, so that the molten resin is prevented from flowing out of the pair of resin members 5a, 5b. It has become.

  Outer edge surfaces 29 are respectively formed at four positions on the diagonal line outside the resin inflow portion 27. Each outer edge 29 on one diagonal is provided with a protrusion 31, and each outer edge 29 on the other diagonal is provided with a hole 33. In other words, the pair of upper and lower resin members 5a and 5b are assembled by inserting the projections 31 of the resin members 5a and 5b into the holes 33, respectively, when the joint surfaces are brought into contact with each other. ing. In the hole 33, a flow path (not shown) is provided for allowing the resin to flow out to the resin inflow portion 27 and the like when the tip portion of the protrusion 31 is melted.

  In such a configuration, when ultrasonic vibration is performed with the resin wires 5a and 5b sandwiching the shielded electric wire 1 and the ground wire 3, the surfaces of the shielded electric wire grooves 21 and 21 are connected to the shielded electric wire 1 and the ground wire 3 respectively. Are set so that the tip surface of the protrusion 31 and the bottom surface of the hole 33 are in close contact with each other.

  As shown in FIG. 3, the ultrasonic horn includes a lower support base 41 and an ultrasonic horn main body 43 that is disposed directly above the ultrasonic horn and generates ultrasonic vibrations. Both the lower support base 41 and the ultrasonic horn main body 43 are provided separately to be movable in the vertical direction. A resin member 5a is set on the upper surface of the lower support base 41, and the set resin member 5a is held with its joint surface facing upward. On the other hand, a resin member 5b is set on the lower surface of the ultrasonic horn, and the set resin member 5b is held with its joint surface facing downward.

  Next, the procedure of the shield processing method of this embodiment will be described with reference to FIG. In FIG. 3, for easy understanding, the structure of the resin members 5a and 5b is simplified and only the shielded wire groove 21 and the contact surface are shown.

  As shown in the figure, the lower resin member 5a is placed on the lower support 41 of the ultrasonic horn, and the vicinity of the end of the ground wire 3 is placed above the ground wire groove 23 of the resin member 5a. To do. Here, since the ground wire 3 is disposed so as to cross the shield wire groove 21, it is placed on the ground wire holding projections 25a and 25b. Subsequently, the shielded electric wire 1 is arranged along the upper position of the shielded electric wire groove 21 so that a part of the shielded electric wire 1 overlaps the ground wire 3, and the upper resin member 5b is covered from above.

  Next, the ultrasonic horn main body 43 is lowered to vibrate with the ultrasonic horn while applying a compressive force between the pair of resin members 5a and 5b. Here, the resin members 5a and 5b are formed such that the groove width L of the central portion of the shielded wire groove 21 is smaller than the groove widths L ′ at two locations on both sides thereof. It is smaller than the inner diameter of the insulating outer skin 13 and larger than the outer diameter of the insulating inner skin 9. For this reason, when the resin member 5a is lowered, the groove edge of the central portion of the shield wire groove 21 of the upper resin member 5b comes into contact with the shield wire 1, and both sides centering on the core wire 7 (left and right direction in FIG. 3). A part of the insulating sheath 13 including the braided wire 11 is between the joint surfaces of the resin members 5a and 5b, that is, between the ground wire holding projections 25a and 25a and between the ground wire holding projections 25b and 25b. The vibration energy is concentrated in this part.

  When the vibration energy is concentrated in this way, the sandwiched portion of the shielded electric wire 1 is deformed, and a part of the insulating sheath 13 including the braided wire 11 is connected to the ground wire holding protrusions 25 of the resin members 5a and 5b. It starts to move toward the gap between 25 (hereinafter referred to as between the joining surfaces). Subsequently, vibration energy concentrates on a part of the insulating sheath 13 including the braided wire 11 that has moved to the gap between the joint surfaces, and the insulating sheath 13 generates heat and is melted and scattered by the vibration energy. In addition, vibration energy is concentrated on the ground wire 3 disposed in the gap via the shielded electric wire 1, and the insulating sheath 17 is melted and scattered. Thereby, the braided wire 11 and the core wire 15 of the ground wire 3 are electrically contacted between the joint surfaces.

  Further, the contact portion between the joint surfaces of the resin members 5a and 5b, and the contact portion where the insulating sheath 13 of the shielded electric wire 1 and the insulating sheath 17 of the ground wire 3 and the inner surface of the resin member 5a and 5b are in contact with each other. The pair of resin members 5a and 5b, the shielded electric wire 1, and the ground wire 3 are fixed to each other by being melted by energy and solidifying the melted portion after the ultrasonic vibration is finished. Thereby, the contact portion between the braided wire 11 and the core wire 15 of the ground wire 3 is between the ground wire holding projections 25a and 25a of the welded resin members 5a and 5b and between the ground wire holding projections 25b and 25b. Since each of them is buried, an electrical connection state can be stably obtained.

  On the other hand, the portion of the shielded wire 1 that is not sandwiched between the joint surfaces of the resin members 5a and 5b is accommodated in the shielded wire groove 21 of the resin members 5a and 5b. Here, the ground wire 3 is arranged below the shielded electric wire 1 so as to intersect with the shielded electric wire 1, but the lower resin member 5a on which the ground wire 3 is placed is the same as the upper resin member 5a. Since the shield wire groove 21 having a size is provided in the center portion, when the shield wire 1 is pressed against the upper resin member 5b, the shield wire 1 is substantially below the region excluding the portion sandwiched between the joining surfaces. Half of the wire is accommodated in the shield wire groove 21 of the lower resin member 5a so that the ground wire 3 is wound around. Therefore, in the shielded electric wire 1, vibration energy concentrates on a portion sandwiched between the joint surfaces of the pair of resin members 5 a and 5 b, so that the insulating endothelium 9 of the shielded electric wire 1 accommodated in the shielded electric wire groove 21 is softened. Melting can be prevented. Thereby, the distance of the core wire 7 in the shielded electric wire 1 and the braided wire 11 can fully be ensured, and the fall of the insulation performance of the shielded electric wire 1 can be prevented.

  FIG. 4 shows a shield processing structure formed by the shield processing method of the present embodiment. In FIG. 4, in order to make the explanation of the structure easy to understand, the contact surface is omitted from the ground wire holding projections 25 a and 25 b and is represented by a plane corresponding to FIG. 3.

  As shown in the figure, the contact portions A and B of the braided wire 11 from which the insulating sheath 13 has been melted and removed and the core wire 15 of the ground wire 3 from which the insulating sheath 17 has been melted and removed are joined to a pair of resin members 5a and 5b. The contact portions A and B are arranged in the shield wire groove 21 of the resin members 5 a and 5 b, that is, other than above or below the core wire 7. According to this structure, when ultrasonic vibration is applied, vibration energy and pressure to the insulating inner skin 9, the insulating outer skin 13 of the shielded electric wire 1 accommodated in the shielded electric wire groove 21, and the insulating outer skin 17 of the ground wire 3. Is kept low, and at least softening and melting of the insulating endothelium 9 can be prevented, so that the distance between the core wire 7 and the braided wire 11 can be kept sufficiently.

  According to the shield processing structure of the present embodiment, it is not necessary to peel off the insulation sheaths 13 and 17 of the shielded electric wire 1 and the ground wire 3, and the lower resin member 5a, the ground wire 3, the shielded electric wire 1, and the upper resin Since the ultrasonic vibrations may be performed by assembling the members 5b in this order, the number of processes is small, and there is no complicated manual work, and automation is possible.

  Further, in the shield processing structure of the present embodiment, the central portion of the shielded wire groove 21 of each resin member 5a, 5b has a groove width L smaller than the inner diameter of the insulating sheath 13 of the shielded wire 1 and the outer diameter of the insulating endothelium 9. In the example, the groove width L is larger than the inner diameter of the insulating sheath 13 of the shielded wire 1 and larger than the outer diameter of the core wire 7. One of the braided wires of the shielded electric wire 1 is arranged so that the contact portions A and B between the braided wire 11 of the shielded electric wire 1 and the core wire 15 of the ground wire 3 are arranged only between the joint surfaces of the resin members 5a and 5b. If a part can be moved between the joint surfaces of each resin member 5a, 5b, also about a cross-sectional shape, it is not restricted to a circular arc.

  Furthermore, in the case of the resin member 5a, in the central portion of the shielded electric wire groove 21, a part of the shielded electric wire 1 is accommodated in the shielded electric wire groove 21, so that the central portion of the shielded electric wire groove 21 is In addition, it is preferable to have a groove space having an arcuate cross section whose groove depth is a length obtained by adding at least the outer radius of the shielded electric wire 1 and the outer diameter of the ground wire 3. On the other hand, in the case of the resin member 5b, the ground wire 3 is not accommodated in the shielded wire groove 21 unlike the resin member 5a, and it is sufficient if there is a space in which the substantially upper half of the shielded wire 1 is accommodated. It is preferable to have a groove space having an arcuate cross section with the outer radius of the shielded electric wire 1 as the groove depth. Thus, the magnitude | size of the shield electric wire groove | channel 21 may differ in resin member 5a, 5b.

  Further, in the shield processing structure of the present embodiment, the ground wire 3 is disposed so as to cross the shield wire groove 21, but the arrangement form of the ground wire 3 is not limited to this example. For example, FIG. As shown in FIG. 2, the ground wire 3 is disposed only on one of the joint surfaces on both sides of the resin member 5a with the shield wire groove 21 in between, and the tip of the ground wire 3 overlaps with the shield wire 1. You may arrange as follows. If the ground wire 3 is arranged in this manner, a part of the braided wire 11 of the shielded electric wire 1 that has moved between the joint surfaces of the resin members 5a and 5b and the tip of the ground wire 3 are operated in the same manner as in FIG. Since the core wire 15 comes into contact and this contact portion is buried, for example, between the ground wire holding projections 25a and 25a, the contact portion can stably obtain an electrical connection state. Further, since the ground wire 3 is not caught in the shielded electric wire groove 21, the pressure applied to the shielded electric wire 1 accommodated in the shielded electric wire groove 21 is reduced, and the core wire 7 of the shielded electric wire 1 and the braided wire 11 are reduced. The distance can be secured more stably.

  In the shield processing structure of the present embodiment, each resin member 5a, 5b has ground wire holding projections 25a, 25b, and the ground wire holding projections 25a, 25b each function as a joint surface. However, the present invention is not limited to this example. For example, as shown in FIG. 6, rail-shaped protrusions 51 a that do not have a ground wire groove and extend along both sides of the shield wire groove 21. You may make it use the resin member 53a, 53b of the same shape which uses 51b as a joint surface. According to the resin members 53a and 53b, since the structure is simpler than that of the resin members 5a and 5b in FIG. 2, the manufacturing cost can be reduced. Further, since the arrangement position of the ground wire 3 is not limited, the degree of freedom in design can be increased.

(Second Embodiment)
7 to 9 show a second embodiment of the present invention, FIG. 7 is a perspective view showing an appearance of a joint portion between a shielded wire and a ground wire, and FIG. 8 is a diagram showing a side surface and a joint surface of a resin member. 9 is an enlarged cross-sectional view of a part of the shield processing structure in which a pair of resin members are welded.

  As shown in FIG. 7, in the shield processing structure of the present embodiment, the shielded electric wire 1 and the ground wire 3 are arranged adjacent to each other in parallel on the resin member 61a, and the resin member 61b is placed thereon to cover the ultrasonic wave. A braid in which the insulating sheath 13 is melted and removed only at a joint portion formed by vibration and sandwiched between a pair of resin members 61a and 61b at a portion where the shielded electric wire 1 and the ground wire 3 are adjacently disposed. The shield processing structure and the configuration are different from those of the first embodiment in that the wire 11 and the core wire 15 from which the insulating sheath 17 has been melted and removed are buried.

  The pair of resin members 61a and 61b of the present embodiment are synthetic resin blocks having the same shape, and the shielded electric wire 1 is accommodated on the joint surfaces of the resin members 61a and 61b as shown in FIG. The shielded wire groove 63 and the ground wire groove 65 that is provided along both groove edges of the shielded wire groove 63 and accommodates the ground wire 3 are respectively provided along the longitudinal direction of the resin members 61a and 61b. Is provided. Here, both the shielded wire groove 63 and the ground wire groove 65 are formed in a circular arc shape, and the ground wire groove 65 is formed with a groove width and a groove depth smaller than the groove width and groove depth of the shielded wire groove 63. ing.

  Here, the groove width of the shielded electric wire groove 63 is the distance (L1) between the groove edges at the boundary with the ground wire groove 65, and the groove depth of the shielded electric wire groove 63 is the contact surface of the resin member 61. The distance (D1) from the groove bottom of the shielded electric wire groove 63 is shown. The groove width of the ground wire groove 65 is the distance (L2) between the groove edge at the boundary with the shield wire groove 63 and the groove edge of the contact surface of the resin member 61. The depth indicates a distance (D2) from the contact surface to the bottom of the ground wire groove 65.

  The groove width L1 of the shielded electric wire groove 63 is set to be larger than the outer diameter of the core wire 7 of the shielded electric wire 1 and smaller than the inner diameter of the insulating outer skin 13, and preferably larger than the outer diameter of the insulating inner skin 13, It is set smaller than the inner diameter. Further, the groove width L2 of the ground wire groove 65 is formed so that the core wire 15 of the ground wire 3 can be accommodated, and is preferably set to be approximately the same as the outer diameter of the core wire 15. On the other hand, the groove depth D1 of the shielded electric wire groove 63 is set to be substantially the same as the radius of the outer shape of the shielded electric wire 1, and the groove depth D2 of the ground wire groove 65 is substantially the same as the radius of the core wire 15 of the ground wire 3. It is preferably set.

  In the present embodiment, first, the shielded electric wire 1 is arranged along the shielded electric wire groove 63 of the resin member 61 a, and the ground wire 3 is arranged along any one of the ground wire grooves 65. The shielded electric wire 1 and the ground wire 3 may not be arranged over the entire groove. In this state, the resin member 61b is covered and pressed and subjected to ultrasonic vibration. Here, when ultrasonic vibration is applied, the boundary portion between the shielded wire groove 63 and the ground wire groove 65 of the pair of resin members 61 a and 61 b abuts the shielded wire 1, so that it does not fit in the shielded wire groove 63. A portion of the insulating sheath 13 including the braided wire 11 is deformed, and the deformed portion moves between the ground wire grooves 65 and 65 of the resin members 61a and 61b. Since vibration energy is concentrated between the ground wire grooves 65 and 65, the insulation sheath 13 of the shielded electric wire 1 is melted and removed, and the insulation sheath 17 of the ground wire 3 is melted and removed, so that the braided wire 1011 and the ground wire are removed. The three core wires 15 are in electrical contact, and finally the ground wire grooves 65 and 65 are welded.

  In the present embodiment, as shown in FIG. 9, the braided wire 11 and the core wire 15 of the ground wire 3 are buried between the ground wire grooves 65, 65. The contact portion can stably obtain an electrical connection state. On the other hand, since the other part of the shielded electric wire 1 is accommodated between the shielded electric wire grooves 63, 63, excessive vibration energy is not applied, and the insulating endothelium 9 of the shielded electric wire 1 is prevented from being softened or melted. Can do. Thereby, the distance of the core wire 7 and the braided wire 11 can fully be ensured, and the fall of the insulation performance of the shielded electric wire 1 can be prevented.

  In the present embodiment, since the two ground wire grooves 65 are formed, the same effect as described above can be obtained even if the two ground wires 3 are arranged on both sides of the shielded electric wire 1. Further, only one earth wire groove 65 may be formed. In the present embodiment, the shield wire groove 63 and the ground wire groove 65 are described as being formed over the longitudinal direction of the resin member 61. You may make it form only in a part of.

(Third embodiment)
In this embodiment, at least a part of the shield electric wire 1 having a circular cross section is formed into a predetermined cross sectional shape with a mold or a jig, and the shielded electric wire after forming is sandwiched between the resin members together with the ground wire 3. The configuration differs from the other embodiments in that sonic excitation is performed. The resin member used in the present embodiment can be the same as the resin members 61a and 61b of the second embodiment.

  FIG. 10 is a diagram showing a cross-sectional structure after forming the shielded electric wire 1 in the present embodiment. Thus, the shielded electric wire 1 is previously formed into a UFO shape so that both sides of the core wire 7 are crushed from the vertical direction and spread outward. The shielded electric wire 1 thus formed is disposed in the shielded electric wire groove 63 of the resin member 61a, and the unformed ground wire 3 having a circular cross section is disposed in the ground wire groove 65 so as to overlap the shielded electric wire 1 and the resin member. 61b is applied and subjected to ultrasonic vibration. As a result, a part of the braided wire 11 of the shielded electric wire 1 is surely disposed between the ground wire grooves 65, 65, so that the vibration energy is concentrated on this portion, and the insulating sheath 13 of the shielded electric wire 1 is melted and removed. At the same time, the insulation sheath 17 of the ground wire 3 is melted and removed, so that the braided wire 11 and the core wire 15 of the ground wire 3 can be reliably brought into contact with each other.

  In the present embodiment, the example in which the formed shielded electric wire is applied to the resin members 61a and 61b of the second embodiment has been described. However, the present invention is not limited thereto, and the resin members 5a and 5b of the first embodiment are used. It is also possible to apply to the resin members 53a and 53b.

  Further, in the present embodiment, an example in which the shielded electric wire 1 is formed has been described. For example, the ground wire 3 is formed so that the tip portion of the ground wire 3 is curved in an R shape, and this curved portion is the central portion of the shielded electric wire groove 21. You may make it arrange | position in the groove | channel of (FIG. 2). In this way, when the ultrasonic vibration is applied, it is not necessary for the shielded electric wire 1 to press the ground wire 1 downward and accommodate it in the shielded electric wire groove 21, so that the pressure and vibration energy applied to the shielded electric wire 1 are reduced. It is reduced, and softening and melting of the insulating endothelium 9 of the shielded electric wire 1 can be prevented more reliably. Furthermore, if the ground wire 3 thus formed is used, even if the ground wire 3 is arranged on the shielded electric wire 1, it is possible to obtain the same effect as the case where the earth wire 3 is arranged below the shielded electric wire. Become.

DESCRIPTION OF SYMBOLS 1 Shield electric wire 3 Ground wire 5,53,61 Resin member 7,15 Core wire 9 Insulating endothelium 11 Braided wire 13,17 Insulating outer sheath 21,63 Shield electric wire groove 23,65 Ground wire groove 25 Ground wire holding projection 41 Lower support Table 43 Ultrasonic horn body

Claims (4)

A shielded electric wire having an insulating endothelium covering the outer periphery of the core wire, a braided wire covering the outer periphery of the insulating endothelium, and an insulating outer sheath covering the outer periphery of the braided wire, and a covered ground wire disposed across the shielded electric wire, In a shield processing structure of a shielded wire comprising a pair of resin members that are welded by sandwiching the shielded wire and the ground wire,
The pair of resin members each have a shielded electric wire groove that accommodates the shielded electric wire, and a joint portion in which the pair of resin members are joined to each other is formed on the groove edges on both sides of each shielded electric wire groove, by a portion of the braided wire of the shield wire to the joint portion moves, only in at least one of the joining portion, said ground wire insulated outer skin is covered with the braided wire which is melted removed melted removed A shielded structure for a shielded wire, wherein the shielded wire is embedded in a state where the core wire is electrically connected. The shield processing structure for a shielded electric wire according to claim 1, wherein the shielded electric wire and the ground wire are arranged so as to cross each other . The shield processing structure for a shielded electric wire according to claim 1, wherein the shielded electric wire and the tip of the ground wire are arranged so as to intersect with each other . The shielded wire shielding structure according to claim 1, wherein the shielded wire and the ground wire are arranged adjacent to each other in parallel .

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