JP4034042B2 - Shield processing structure of multi-core shielded wire - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shield processing structure for a multi-core shielded electric wire for connecting a shield covering member of a multi-core shielded electric wire and a ground wire.
[0002]
[Prior art]
The present applicant, as a shield processing structure and method for a multi-core shielded wire, electrically connects a shield coating member of the multi-core shielded wire to a conductive wire of a ground wire using an ultrasonic horn using a pair of resin members. Suggested what to do. Hereinafter, the shield processing structure and method will be described.
[0003]
As shown in FIG. 7, the multi-core shielded electric wire 100 covers a plurality of shield core wires 100c in which a core wire 100a is covered with an insulating endothelium 100b, a drain wire 100d, and the outer periphery of the drain wire 100d and the plurality of shield core wires 100c. The metal foil covering member 100e is made of a conductor, and an insulating skin 100f covering the outer periphery of the metal foil covering member 100e. The pair of resin members 101 and 102 have recesses 101b and 102b in which holes corresponding to the outer cross-sectional shape of the multi-core shielded electric wire 100 are formed in a state where the joint surfaces 101a and 102a face each other. The ultrasonic horn 105 is composed of a lower support base 105a and an ultrasonic horn main body 15b disposed immediately above the ultrasonic support horn 105a.
[0004]
Next, the shield processing procedure will be described. The lower resin member 102 is placed on the lower support base 105a of the ultrasonic horn 105, the multi-core shielded electric wire 100 is placed thereon, the one end side of the ground wire 103 is placed thereon, and further thereon The upper resin member 101 is covered. In this way, the multi-core shielded electric wire 100 is disposed in the recesses 101b and 102b of the pair of resin members 101 and 102, and the ground wire 103 is interposed between the multi-core shielded electric wire 100 and the upper resin member 101. One end is interposed.
[0005]
In this state, the ultrasonic horn 105 is vibrated while applying a compressive force between the pair of resin members 101 and 102. Then, the insulation sheath 100f of the multi-core shielded electric wire 100 and the insulation sheath 103b of the ground wire 103 are melted and scattered by heat generated by vibration energy, and the conductive wire (not shown) of the ground wire 103 and the metal foil coating of the multi-core shield wire 100 The member 100e is electrically contacted. Further, the contact portions of the joint surfaces 101a and 102a of the pair of resin members 101 and 102, the inner peripheral surfaces of the recesses 101b and 102b of the pair of resin members 101 and 102, and the insulating outer skin 100f of the multicore shielded electric wire 100 are contacted. The contact portion between the insulating resin 103b of the grounding wire 103 and the pair of resin members 101 and 102 is melted by heat generated by vibration energy, and the melted portion is solidified after the ultrasonic vibration is finished. The resin members 101 and 102, the multi-core shielded electric wire 100, and the ground wire 103 are fixed to each other.
[0006]
According to this shield processing structure and method, there is no need to peel off the insulation sheaths 100f and 103b of the multi-core shielded electric wire 100 and the ground wire 103, and the lower resin member 102, the multi-core shielded electric wire 100, the ground wire 103, Since ultrasonic vibrations may be performed by assembling the upper resin member 101 in this order, the number of processes is small, and there is no complicated manual work, so that automation is possible.
[0007]
[Problems to be solved by the invention]
However, the ultrasonic vibration generated by the ultrasonic horn main body 105 b is transmitted to the multi-core shielded electric wire 100 via the upper resin member 101. The vibration and heat generation cause the metal foil covering member 100e, which is a weak component among the components of the multi-core shielded electric wire 100, to be broken or cut, and a conductive wire (not shown) of the ground wire 103 is not shown. There is a problem that an appropriate contact state cannot be obtained. Further, when the metal foil covering member 100e is torn or cut, the strength of the multi-core shielded electric wire 100 is reduced accordingly.
[0008]
Therefore, the present invention has been made to solve the above-described problems, and it is possible to improve the electrical performance by reliably obtaining electrical contact between the ground wire and the shield covering member, and the wire strength. It aims at providing the shield processing structure of the multi-core shielded electric wire which does not generate | occur | produce a fall.
[0009]
[Means for Solving the Problems]
According to a first aspect of the present invention, there are provided a plurality of shield core wires whose core wires are covered with insulating endothelium, a metal foil covering member of a conductor covering the outer periphery of the plurality of shield core wires, and an insulating outer sheath covering the outer periphery of the metal foil covering member. A pair of resin members each having a recess in which a hole substantially corresponding to the outer cross-sectional shape of the multi-core shielded electric wire is formed in a state where the joint surfaces of the multi-core shielded wires are butted together, and a grounding wire With
The multi-core shielded electric wire is sandwiched between the pair of resin members, the multi-core shielded electric wire is disposed in each of the recesses, and one end side of the ground wire is between the multi-core shielded electric wire and the resin member In this state, ultrasonic vibration is applied with an ultrasonic horn while applying a compressive force between the pair of resin members, and at least the insulating outer shell is melted and scattered, so that the conductive wire of the ground wire and the metal foil covering member And a contact processing side of the resin member that contacts an ultrasonic horn main body that generates ultrasonic waves of the ultrasonic horn. In the central portion, a recess portion is provided at a position corresponding to a location where the metal foil covering member and the ground wire are in electrical contact .
[0010]
In the shield processing structure of the multi-core shielded electric wire, the vibration generated by the ultrasonic horn main body is transmitted to the multi-core shielded electric wire via the resin member in contact with the ultrasonic horn main body. The vibration applied to the shield coating member of the multi-core shielded electric wire through the resin member is reduced because it is in contact with only a small area by the indented portion, and the shield coating member is broken by ultrasonic vibration and heat generation, It will not run out.
[0014]
Further, in the shield processing structure of the multi-core shielded electric wire, the vibration applied at the shortest distance does not act on the electrical contact portion between the shield covering member and the ground wire via the resin member from the ultrasonic horn body.
[0015]
According to a second aspect of the present invention, there are provided a plurality of shield core wires whose core wires are covered with an insulating endothelium, a metal foil covering member of a conductor covering the outer periphery of the plurality of shield core wires, and an insulating sheath covering the outer periphery of the metal foil covering member. A pair of resin members each having a recess in which a hole substantially corresponding to the outer cross-sectional shape of the multi-core shielded electric wire is formed in a state where the joint surfaces of the multi-core shielded wires are butted together, and a grounding wire The multi-core shielded electric wire is sandwiched between the pair of resin members, the multi-core shielded electric wire is disposed in each of the recesses, and the ground wire is disposed between the multi-core shielded electric wire and the resin member. In this state, ultrasonic vibration is applied with an ultrasonic horn while applying a compressive force between the pair of resin members, and at least the insulating outer shell is melted and scattered, so that the conductive wire of the grounding wire and the metal Foil coating A shielded structure of a multi-core shielded electric wire in which a contact portion with a material is formed, the ultrasonic horn main body that generates ultrasonic waves of the ultrasonic horn, on the bonding surface side to the resin member, A shield processing method for a multi-core shielded electric wire, wherein a hollow portion is provided at a position corresponding to a central portion where the metal foil covering member and the ground wire are in electrical contact.
[0016]
In the shield processing structure of the multi-core shielded electric wire, since the indented portion is provided on the surface of the ultrasonic horn main body that is joined to the resin member, the effect equivalent to that of the first aspect can be obtained.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0018]
1 to 6 show an embodiment of the present invention, FIG. 1 (A) is a cross-sectional view of a multi-core shielded electric wire 1, FIG. 1 (B) is an enlarged cross-sectional view of a developed metal foil covering member 6, and FIG. 2 (A) is a perspective view of the pair of resin members 10 and 11, FIG. 2 (B) is a perspective view of the upper resin member 10 as viewed from above, and FIG. 3 shows an arrangement relationship of the members during ultrasonic vibration. 4 is a cross-sectional view showing a set state of each member immediately before ultrasonic vibration, FIG. 5 is a cross-sectional view showing a shield processing structure obtained by ultrasonic vibration, and FIG. 6 is added with a shield processing structure. It is a perspective view of the made multi-core shielded electric wire 1.
[0019]
In the shield processing structure, the metal foil covering member 6 of the multi-core shielded electric wire 1 is electrically connected to the conductive wire 13a of the ground wire 13 using the ultrasonic horn 15 using the pair of resin members 10 and 11. There will be described in detail below.
[0020]
As shown in FIG. 1A, a multi-core shielded electric wire 1 includes two shield core wires 4 in which a core wire 2 is covered with an insulating endothelium 3, a drain wire 5, two shield core wires 4 and a drain wire 5. The metal foil covering member 6 is a conductor shield covering member that covers the outer periphery of the metal foil, and an insulating skin 7 that covers the outer periphery of the metal foil covering member 6. The insulating inner skin 3 and the insulating outer skin 7 are formed of an insulating material made of synthetic resin, and the core wire 2 and the drain wire 5 are formed of an electric conductor in the same manner as the aluminum foil member 6. Further, as shown in FIG. 1B, the metal foil covering member 6 is composed of a polyester sheet 6a and, for example, an aluminum metal foil portion 6b bonded to one surface of the polyester sheet 6a. It arrange | positions in a cylindrical shape so that it may become an outer peripheral surface. The metal foil 6b has a thickness D of 50 micrometers or more.
[0021]
As shown in FIG. 2A, the pair of resin members 10 and 11 are blocks made of synthetic resin, respectively, and the outer cross-sectional shape of the multi-core shielded electric wire 1 in a state where the joint surfaces 10a and 11a are abutted with each other. Recesses 10b and 11b are formed in which holes substantially corresponding to are formed. The recesses 10b and 11b are semicircular arc-shaped grooves whose radius is the outer radius of the multi-core shielded electric wire 1 in detail. The resin members 10 and 11 are respectively provided with convex portions 10c and 11c on the left and right sides of the concave portions 10b and 11b and continuously along the periphery thereof. And each convex part 10c, 11c of a pair of resin members 10 and 11 is provided in the position which each joint surface 10a, 1a opposes mutually. Further, as shown in FIG. 2B or the like, the upper resin member 10 is provided with a recessed portion 10e on the side of the joint surface 10d with which the ultrasonic horn main body 15b described below is brought into contact. The indented portion 10e is provided at an upper position corresponding to a location where the metal foil covering member 6 and the ground wire 13 are in electrical contact.
[0022]
Further, the physical properties of the resin members 10 and 11 are harder to melt than the insulating outer shell 7 and the like, and are acrylic resin, ABS (acrylonitrile-butadiene-styrene copolymer) resin, PC (polycarbonate) resin, PE (polyethylene). Resin, PEI (polyetherimide) resin, PBT (polybutylene terephthalate) resin, and the like, which are harder than vinyl chloride or the like generally used in the insulation sheath 7 or the like. From the viewpoint of electrical conductivity and electrical safety, practicality is required for all of the resins listed above, and in particular, when including appearance and insulation, PEI (polyetherimide) resin, PBT (Polybutylene terephthalate) resin is suitable.
[0023]
As shown in FIG. 3, the ground wire 13 is composed of a conductive wire 13a and an insulating sheath 13b covering the outer periphery.
[0024]
As shown in FIG. 3, the ultrasonic horn 15 is disposed directly above the lower support base 15a capable of positioning the resin member 11 disposed below, and exerts a pressing force downward. And an ultrasonic horn main body 15b to which ultrasonic vibration can be applied. The lower surface of the ultrasonic horn main body 15 b is a bonding surface 16 that comes into contact with the upper resin member 10.
[0025]
Next, the shield processing procedure will be described. As shown in FIG. 3, the lower resin member 11 is placed on the lower support 15 a of the ultrasonic horn 15, and the vicinity of the end of the multi-core shielded electric wire 1 is placed thereon, and the ground wire 13 is placed thereon. Is placed on one end side, and the upper resin member 10 is covered from above. In this way, the multi-core shielded electric wire 1 is disposed in the recesses 10b, 11b of the pair of resin members 10, 11, and the ground wire 13 is interposed between the multi-core shielded electric wire 1 and the upper resin member 11. One end is interposed.
[0026]
Next, as shown in FIG. 4, the ultrasonic horn body 15 b is lowered and the ultrasonic horn 15 is vibrated while applying a compressive force between the pair of resin members 10 and 11. Then, the insulation sheath 7 of the multi-core shielded wire 1 and the insulation sheath 13b of the ground wire 13 are melted and scattered by internal heat generation of vibration energy, and the conductive wire 13a of the ground wire 13 and the metal foil covering member 6 of the multi-core shield wire 1 Are electrically contacted (see FIG. 5). Further, the contact portions of the joint surfaces 10 a and 11 a of the pair of resin members 10 and 11, the inner peripheral surfaces of the recesses 10 b and 11 b of the pair of resin members 10 and 11, and the insulating sheath 7 of the multicore shielded electric wire 1. The contact portion between the insulating resin 13b of the grounding wire 13 and the pair of resin members 10 and 11 is melted by internal heat generation of vibration energy, and the melted portions are solidified after the ultrasonic vibration is finished. The resin members 10 and 11, the multi-core shielded electric wire 1 and the ground wire 13 are fixed to each other (see FIGS. 5 and 6).
[0027]
According to this shield processing structure, it is not necessary to peel off the insulation sheaths 7 and 13b of the multi-core shielded electric wire 1 and the ground wire 13, and the lower resin member 11, the multi-core shielded electric wire 1, the ground wire 13, and the upper Since the ultrasonic vibration may be performed by assembling the resin members 10 in this order, the number of processes is small, and there is no complicated manual work, and automation is possible.
[0028]
Further, in the above operation process, the vibration generated by the ultrasonic horn main body 15b is transmitted to the multi-core shielded electric wire 1 through the resin member 10 in contact with the ultrasonic horn main body 15b, but comes into contact with the ultrasonic horn main body 15b. Since the resin member 10 is in contact with the recessed portion 10e only in a small area, vibration applied to the metal foil covering member 6 of the multi-core shielded electric wire 1 through the resin member 10 is reduced, and the metal foil covering member 6 is It is not torn or cut by ultrasonic vibration and heat generation. Therefore, it is possible to reliably obtain electrical contact between the ground wire 13 and the metal foil covering member 6 and to improve electrical performance. In addition, since the metal foil covering member 6 is not torn or cut off due to ultrasonic vibration and heat generation, it is possible to prevent a situation in which the wire strength is reduced.
[0029]
Moreover, in the said embodiment, although the hollow part 10e was provided in the joint surface 10d side of the resin member 10, you may provide in the joint surface 16 side of the ultrasonic horn main body 15b, and the resin member 10 and ultrasonic horn. Even if it is provided on both the connection surfaces 10d, 16 side with the main body 15b, the same operation and effect can be obtained.
[0030]
Moreover, in the said embodiment, since the hollow part 10e was provided in the position corresponding to the location where the metal foil coating member 6 and the ground wire 13 are electrically contacted, the resin member 10 is removed from the ultrasonic horn main body 15b. Therefore, the vibration applied to the shield contact member 1 and the ground wire 13 at the shortest distance does not act, so that the vibration of the shield cover member 6 and the ground wire 13 to the electrical contact portion can be effectively reduced. .
[0031]
Moreover, in the said embodiment, since the thickness D of the metal foil part 6b is provided in thickness 50 micrometers or more, even if a somewhat big vibration and heat_generation | fever act on the metal foil coating member 6, a metal foil coating member 6 is not torn or cut. Therefore, in the above embodiment, coupled with the reduction of the ultrasonic vibration described above, it is possible to reliably obtain the electrical contact between the ground wire 13 and the metal foil covering member 6 and further improve the electrical performance. Moreover, it is possible to reliably prevent a situation where the wire strength is lowered.
[0032]
Further, in the above operation process, before the ultrasonic vibration is performed, the pair of resin members 10 and 11 are in close contact with each other via the convex portions 10c and 11c, and the ultrasonic vibration is started in this state. Then, since this vibration energy is concentrated on the convex portions 10c and 11c, the pair of resin members 10 and 11 are sufficiently melted and closely adhered to each other in the vicinity of the joint surfaces 10a and 11a. Due to the concentration of vibration energy on the convex portions 10c and 11c of the members 10 and 11, the vibration energy to the ground wire 13 and the multi-core shielded electric wire 1 is suppressed to a low level, and the insulation sheath 7 disposed outside the multi-core shielded electric wire 1 Only the vibration energy to the extent that the insulating sheath 13b of the ground wire 13 is melted and the ground wire 13 and the metal foil covering member 6 are electrically connected is transmitted. Therefore, the insulating endothelium 3 of the multi-core shielded electric wire 1 is not broken or cut by melting due to the transmission of excessive vibration energy. As described above, the connection between the pair of resin members 10 and 11 can be strengthened, and the short circuit and the strength deterioration of the multi-core shielded electric wire 1 due to the ground wire 13 or the metal foil foil covering member 6 coming into contact with the core wire 2 can be prevented. it can.
[0033]
Moreover, in the said embodiment, since the convex parts 10c and 11c provided in each resin member 10 and 11 are continuously provided in the right and left of the recessed parts 10b and 11b and along the periphery, it is multi-core. Since vibration energy concentrates on the convex portions 10c and 11c at any position in the axial direction of the shielded electric wire 1, vibration energy to the multi-core shielded electric wire 1 can be reduced uniformly in the axial direction of the multi-core shielded electric wire 1.
[0034]
Moreover, in the said embodiment, since the convex parts 10c and 11c are provided in the position where both joint surface 10a, 11a mutually opposes both of a pair of resin members 10 and 11, a pair of resin member 10 is provided. , 11 can have the same shape, there are advantages such as a reduction in manufacturing cost of the resin members 10, 111 and easy handling of the resin members 10, 11.
[0035]
Further, in the above embodiment, if a low melting point metal plating wire such as a tin plating electric wire is used as the conductive wire 13a of the grounding wire 13, the low melting point metal plating wire is partially melted by vibration energy, and the metal foil covering member 6 is used. Therefore, the reliability of the contact location between the metal foil covering member 6 of the multi-core shielded electric wire 1 and the conductive wire 13a of the ground wire 13 is improved.
[0036]
In addition, according to the said embodiment, although convex part 10c, 11c was provided in both joining surface 10a, 11a of a pair of resin members 10, 11, joining surface 10a, 11a of any one resin member 10,11 is provided. It may be provided only in
[0037]
In addition, according to the said embodiment, when arrange | positioning the grounding wire 13 between the resin member 10 and the multi-core shielded electric wire 1, it arrange | positioned in the state which does not peel off the insulation outer skin 13b, However, it peels off the insulation outer skin 13b. You may make it arrange a thing.
[0038]
In addition, according to the said embodiment, although the shield coating | coated member is comprised by the metal foil coating | coated members 6, such as aluminum, you may comprise by the braided wire of an electrically conductive material.
[0039]
In addition, according to the said embodiment, although the drain wire 5 is provided in the multi-core shielded electric wire 1, the thing in which the drain wire 5 is not provided may be sufficient. However, if the drain line 5 is provided as in the above-described embodiment, the drain line 5 can be shielded by being connected to the ground, so that there is an advantage that variations in shielding measures are increased accordingly.
[0040]
In addition, according to the said embodiment, although the multi-core shielded electric wire 1 demonstrated what has the two shield core wires 4, it cannot be overemphasized that this invention can be applied similarly to what has the three or more shield core wires 4. FIG. It is.
[0041]
【The invention's effect】
As described above, according to the invention of claim 1, the vibration generated by the ultrasonic horn main body is transmitted to the multi-core shielded electric wire via the resin member in contact with the ultrasonic horn main body. Since the contact with the resin member is only in a small area due to the recess, the vibration applied to the shield coating member of the multi-core shielded wire through the resin member is reduced, and the shield coating member generates ultrasonic vibration and heat generation. Will not tear or break. Therefore, it is possible to reliably obtain electrical contact between the ground wire and the shield covering member, and it is possible to improve the electrical performance, and the electric wire strength does not decrease.
[0043]
In addition, since the vibration applied at the shortest distance from the ultrasonic horn body through the resin member to the electrical contact location between the shield coating member and the ground wire does not act, the electrical contact location between the shield coating member and the ground wire is not affected. Vibration can be effectively reduced.
[0044]
According to the second aspect of the present invention, an effect equivalent to that of the first aspect of the invention can be obtained by providing the depression on the side of the joining surface of the ultrasonic horn body to the resin member.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, in which (A) is a cross-sectional view of a multi-core shielded electric wire, and (B) is an enlarged cross-sectional view of a developed metal foil covering member.
2A and 2B show an embodiment of the present invention, in which FIG. 2A is a perspective view of a pair of resin members, and FIG. 2B is a perspective view of the upper resin member as viewed from above.
FIG. 3 is a cross-sectional view illustrating an embodiment of the present invention and illustrating an arrangement relationship of each member during ultrasonic vibration.
FIG. 4 is a cross-sectional view showing a set state of each member immediately before ultrasonic vibration according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a shield processing structure obtained by ultrasonic vibration according to an embodiment of the present invention.
FIG. 6 is a perspective view of a multi-core shielded electric wire to which a shield processing structure is added according to an embodiment of the present invention.
FIG. 7 is a cross-sectional view of a shield processing structure of a conventional example.
[Explanation of symbols]
1 Multi-core shielded wire 2 Core wire 3 Insulating endothelium 4 Shield core wire 5 Drain wire 6 Metal foil coating member (shield coating member)
7 Insulating skin 10, 11 Resin member 10a, 11a Joint surface 10b, 11b Recess 10c, 11c Convex portion 10d Joint surface 10e Recessed portion 13 Ground wire 13a Conductive wire 13b Insulating skin 15 Ultrasonic horn 15b Ultrasonic horn body 16 Joint surface

Claims (2)

A multi-core shielded electric wire having a plurality of shield core wires whose core wires are covered with insulating endothelium, a metal foil covering member of a conductor covering the outer periphery of the plurality of shield core wires, and an insulating sheath covering the outer periphery of the metal foil covering member And a pair of resin members each having a recess in which a hole substantially corresponding to the outer cross-sectional shape of the multi-core shielded electric wire in a state in which the joint surfaces are butted together, and a grounding wire,
The multi-core shielded electric wire is sandwiched between the pair of resin members, the multi-core shielded electric wire is disposed in each of the recesses, and one end side of the ground wire is between the multi-core shielded electric wire and the resin member In this state, ultrasonic vibration is applied with an ultrasonic horn while applying a compressive force between the pair of resin members, and at least the insulating outer shell is melted and scattered, so that the conductive wire of the ground wire and the metal foil covering member A shield processing structure of a multi-core shielded wire in which a contact portion is formed,
The metal foil covering member and the ground wire are electrically contacted at the center of the resin member on the bonding surface side of the resin member that contacts the ultrasonic horn body that generates ultrasonic waves of the ultrasonic horn. A shield processing structure for a multi-core shielded electric wire, characterized in that a recess is provided at a position corresponding to the location of the multi-core shielded wire. A multi-core shielded electric wire having a plurality of shield core wires whose core wires are covered with insulating endothelium, a metal foil covering member of a conductor covering the outer periphery of the plurality of shield core wires, and an insulating sheath covering the outer periphery of the metal foil covering member And a pair of resin members each having a recess in which a hole substantially corresponding to the outer cross-sectional shape of the multi-core shielded electric wire in a state in which the joint surfaces are butted together, and a grounding wire,
The multi-core shielded electric wire is sandwiched between the pair of resin members, the multi-core shielded electric wire is disposed in each of the recesses, and one end side of the ground wire is between the multi-core shielded electric wire and the resin member In this state, ultrasonic vibration is applied with an ultrasonic horn while applying a compressive force between the pair of resin members, and at least the insulating outer shell is melted and scattered, so that the conductive wire of the ground wire and the metal foil covering member A shield processing structure of a multi-core shielded wire in which a contact portion is formed,
Corresponding to the center of the resin member on the side of the ultrasonic horn main body that generates ultrasonic waves of the ultrasonic horn, corresponding to the center of the resin member, the metal foil covering member and the ground wire are in electrical contact A method for shielding a multi-core shielded electric wire, wherein a recessed portion is provided at a position to be shielded.

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