JP6156173B2 - Electromagnetic shield parts - Google Patents

Description

  The present invention relates to an electromagnetic shield component including a hard shield pipe and a flexible shield member, and an electric wire with an electromagnetic shield component including the same.

  In a wire harness mounted on a vehicle such as an automobile, an electromagnetic shield component surrounding the wire may be employed. For example, the electromagnetic shielding component has a hard metal pipe and a cylindrical braided wire connected thereto.

  In the electromagnetic shielding component, the metal pipe performs an electromagnetic shielding function, physically protects the electric wire, and further maintains the electric wire in a shape along a predetermined wiring path.

  On the other hand, since the braided wire is a member formed in a cylindrical shape by knitting a copper wire, it has flexibility. The braided wire having flexibility fulfills an electromagnetic shielding function and enables bending deformation of a portion near the end of the electric wire.

  As shown in Patent Document 1, a metal pipe and a braided wire are usually connected by caulking. In this case, in the caulking, the metal pipe is fastened from the outer peripheral surface side, and a part of the braided wire covering the outer peripheral surface near the end of the metal pipe is sandwiched between the metal pipe. Thereby, the part near the end of the braided wire stays on the outer peripheral surface side of the part near the end of the metal pipe.

  On the other hand, in the shield conductive path shown in Patent Document 2, the braided wire is sandwiched between the outer peripheral surface of the support member inserted into the metal pipe and the inner peripheral surface of the crimped portion (compressed portion) of the metal pipe. Thereby, the part near the end of the braided wire stays on the inner peripheral surface side of the part near the end of the metal pipe.

JP 2007-280814 A JP 2006-31027 A

  By the way, in the conventional general electromagnetic shielding component, the end surface of the metal pipe exists inside the braided wire. In this case, there is a concern that the electric wire passed through the hollow portion of the metal pipe may be damaged by contact with the edge of the end surface of the metal pipe.

  Therefore, a general electromagnetic shielding component includes an edge cover that covers the end of the metal pipe. However, recently, due to the demand for reducing man-hours for parts management, it is desired that the damage of the electric wire can be prevented without using the edge cover.

  On the other hand, in the shield conductive path shown in Patent Document 2, the braided wire is interposed between the electric wire and the end portion of the metal pipe to prevent the electric wire from being damaged. Therefore, an edge cover is not necessary.

  In the shield conductive path shown in Patent Document 2, a gap is required between the inner peripheral surface of the metal pipe and the outer peripheral surface of the wire bundle so that a support member for fastening the braided wire can be inserted.

  However, when it is necessary to employ a thinner metal pipe, it is necessary to increase the accommodation density of the electric wire in the hollow portion of the metal pipe, and it becomes difficult to ensure a gap enough to insert the support member into the metal pipe.

  The present invention relates to an electromagnetic shield component, and even if the housing density of the electric wire in the hollow portion of the hard pipe is increased, the electric wire is damaged due to contact with the edge of the pipe without requiring an additional component such as a cover at the end of the pipe. The purpose is to prevent.

The electromagnetic shield component according to the first to third aspects includes a shield pipe, a flexible shield member, and a connecting member.
(1) The shield pipe is a member that includes a metal material, is formed in a hard cylindrical shape, and has an enlarged diameter portion. The diameter-enlarged portion is formed with a diameter larger than a portion that forms a part from one end of the shield pipe and has an inner peripheral surface and an outer peripheral surface that are adjacent to each other. The enlarged diameter portion includes a conical end portion subjected to flare processing.
(2) The flexible shield member is a member that includes a metal material and is formed in a flexible cylindrical shape. In the flexible shield member, a part near one end forms an overlapping portion covering a part of the outer peripheral surface from the conical end portion of the shield pipe. The flexible shield member forms a series of hollow portions together with the shield pipe.
(3) The connecting member is a member that is formed in an annular shape and sandwiches and holds the overlapping portion of the flexible shield member between an outer peripheral surface of the shield pipe and a portion near the conical end portion.

In the electromagnetic shielding component according to the first aspect , the overlapping portion of the flexible shield member is folded back from the portion sandwiched between the shield pipe and the connecting member to the outer peripheral surface side of the connecting member to be doubled. Is formed.

In the electromagnetic shielding component according to the second aspect , the connecting member sandwiches and overlaps the overlapping portion of the flexible shielding member with the outer peripheral surface of the enlarged diameter portion of the shield pipe.

The electromagnetic shielding component according to the third aspect further includes a grommet that is a non-conductive cylindrical elastic member. In the natural state, the grommet has a larger inner peripheral surface of the portion near one end surrounding the periphery of a part of the shield pipe than the outer peripheral surface of the portion adjacent to the enlarged diameter portion in the shield pipe, And it is formed with the diameter smaller than the outer peripheral surface of the said enlarged diameter part.

  In each of the above aspects, the end of the hard shield pipe containing the metal material is formed in a conical shape that is flared and spreads toward the outer peripheral surface. Therefore, the electric wire passed through the hollow portion of the shield pipe is unlikely to contact the edge of the end surface of the shield pipe. As a result, the electric wire can be prevented from coming into contact with the edge of the shield pipe and being damaged.

  In each of the above aspects, additional parts such as an edge cover of the shield pipe are not necessary. Furthermore, the annular connecting member that fastens the flexible shield member to the shield pipe is attached to the outer peripheral surface side of the shield pipe. Therefore, the flexible shield member can be connected to the shield pipe without any problem even if the accommodation density of the electric wire in the hollow portion of the shield pipe (hard pipe) is increased.

In the first aspect, the overlapping portion of the flexible shield member is doubled by being folded back from the portion sandwiched between the shield pipe and the connecting member toward the outer peripheral surface of the connecting member. In this case, as will be described later, in the step of passing the electric wire through the hollow portion of the electromagnetic shielding component, it is not necessary to penetrate the hollow portion of the flexible shield member from the end thereof. As a result, the electric wire can be easily passed through the hollow portion of the electromagnetic shielding component.

In the second aspect, the connecting member clamps and overlaps the overlapping portion of the flexible shield member with the outer peripheral surface of the enlarged diameter portion of the shield pipe. In this case, the pipe machining step for creating the enlarged diameter portion in the shield pipe can also serve as the attachment step for the connecting member, thereby simplifying the manufacturing process of the electromagnetic shield component. In addition, the flexible shield member can be fastened to the shield pipe using a very simple connecting member.

In the third aspect, the grommet is a member for preventing liquid from entering the flexible shield member, and a portion near one end of the grommet is covered with the shield pipe in close contact with the outer peripheral surface of the enlarged diameter portion. It is a closed part. The inner peripheral surface of the closing portion in the grommet is formed with a diameter larger than the outer peripheral surface of the portion adjacent to the enlarged diameter portion in the shield pipe and smaller than the outer peripheral surface of the enlarged diameter portion.

  When an electromagnetic shield component including a grommet is attached to a support such as a vehicle, it is necessary to move the grommet along the outer peripheral surface of the shield pipe. In order for the grommet having a large friction coefficient to slide along the outer peripheral surface of the shield pipe while keeping the closed portion in close contact with the outer peripheral surface of the shield pipe, a large force is required.

In the third aspect, the closed portion of the grommet is formed with a larger diameter than the outer peripheral surface of the portion that is adjacent to the enlarged diameter portion of the shield pipe. Therefore, in the operation of moving the grommet along the outer peripheral surface of the shield pipe, the grommet can be moved with a very small force except when the closed portion of the grommet passes through the enlarged diameter portion of the shield pipe. As a result, the work of attaching the electromagnetic shielding component including the grommet to the support becomes easy.

It is a perspective view of the principal part of the electric wire 10 with electromagnetic shielding components which concerns on 1st Embodiment. It is a longitudinal cross-sectional view of the principal part of the electric wire 10 with electromagnetic shielding components. It is a longitudinal cross-sectional view of the edge part of a shield pipe when flare processing is given. It is a longitudinal cross-sectional view of the electric wire 10 with electromagnetic shield components before a shield pipe and a flexible shield member are connected. It is a cross-sectional view of the electric wire with electromagnetic shielding component 10 before the shield pipe and the flexible shield member are connected. It is a transverse cross section of electric wire 10 with an electromagnetic shielding component after a shield pipe and a flexible shield member were connected. It is a perspective view of the principal part of 10 A of electric wires with electromagnetic shielding components which concern on 2nd Embodiment. It is a longitudinal cross-sectional view of the principal part of 10 A of electric wires with electromagnetic shielding components. It is a longitudinal cross-sectional view before pipe processing of the electromagnetic shielding component in the electric wire with electromagnetic shielding component 10A. It is a longitudinal cross-sectional view in pipe processing of the electromagnetic shielding component in 10 A of electromagnetic shielding component-attached electric wires. It is a longitudinal cross-sectional view of 10 A of electric wires with electromagnetic shielding components in the middle of an assembly. It is a longitudinal cross-sectional view of the principal part of the electric wire 10B with electromagnetic shielding components which concerns on 3rd Embodiment.

  Hereinafter, embodiments will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention. The electric wire with electromagnetic shielding components according to each embodiment is provided as a wire harness mounted on a vehicle such as an automobile.

<First Embodiment>
First, the configuration of the electromagnetic shield component-attached electric wire 10 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the electric wire 10 with an electromagnetic shielding component includes an electric wire 1 and a cylindrical electromagnetic shielding component 5 that surrounds the electric wire 1. In the cross-sectional view of FIG. 2, the side surface of the electric wire 1 is shown. 4, 8, 11, and 12, the side surface of the electric wire 1 is similarly shown.

<Wire>
The electric wire 1 is an insulated wire having a conductive core wire and an insulating coating covering the periphery of the core wire. In the example shown in FIG. 1, the electromagnetic shield component-equipped electric wire 10 includes a plurality of electric wires 1, and the electromagnetic shield component 5 surrounds the plurality of electric wires 1.

  The electromagnetic shield component 5 includes a shield pipe 2, a flexible shield member 3, and a connecting member 4. The shield pipe 2 and the flexible shield member 3 form a series of hollow portions through which the electric wire 1 passes.

  For convenience, in FIGS. 1 and 2 and the like, the housing density of the electric wire 1 in the hollow portion of the shield pipe 2 is relatively small, that is, the gap between the inner peripheral surface of the shield pipe 2 and the outer peripheral surface of the electric wire 1 is relatively small. Large state is shown. However, in each embodiment, it is also conceivable that the electric wire 1 is accommodated in the hollow portion of the shield pipe 2 with a higher accommodation density than the illustrated state.

  Note that the electric wire 1 may be a multi-core cable. The multi-core cable has a plurality of core wires and an insulation coating that insulates the plurality of core wires and covers the plurality of core wires together.

  Next, the electromagnetic shielding component 5 according to the first embodiment will be described. The electromagnetic shield component 5 has a structure in which the shield pipe 2 and the flexible shield member 3 are connected by a connecting member 4, thereby forming a series of cylindrical shapes.

<Shield pipe>
The shield pipe 2 is a member that includes a metal material and is formed in a hard cylindrical shape. In the present embodiment, the shield pipe 2 is a metal pipe whose main component is a metal such as aluminum or stainless steel.

  It is also conceivable that the shield pipe 2 is a member in which a metal pipe and a non-conductive substance formed on a part of the metal pipe are integrated. For example, the shield pipe 2 may be a pipe having a metal pipe and an insulating coating formed on a part of the inner peripheral surface and the outer peripheral surface of the metal pipe.

  The shield pipe 2 has a conical end portion 220 that forms a part from at least one of both ends thereof, and a base portion 21 that forms the other portion. The conical end portion 220 is a portion formed in a conical shape (a trumpet shape) that expands to the outer peripheral surface side by performing flare processing. The conical end 220 forms a frame of the opening 20 at the end of the shield pipe 2.

  The conical end portion 220 is an example of an enlarged diameter portion that is a part from one end of the shield pipe 2 and has an inner peripheral surface and an outer peripheral surface that are formed with a larger diameter than the adjacent portion (base portion 21). is there. In the present embodiment, the entire enlarged diameter portion is the conical end portion 220. That is, the diameter of the inner peripheral surface of the conical end portion 220 is larger than the diameter of the inner peripheral surface of the base portion 21, and the diameter of the outer peripheral surface of the conical end portion 220 is larger than the diameter of the outer peripheral surface of the base portion 21.

  The shield pipe 2 is a member obtained by subjecting a part from the end of the pipe having a uniform cross-sectional shape over the entire length to a process of expanding the diameter. An example of the processing method will be described later.

  The base 21 of the shield pipe 2 includes a portion that is adjacent to the enlarged diameter portion (conical end portion 220). For example, the base 21 has a tubular shape with a uniform cross-sectional shape. The base 21 is a straight tube or a bent tube. In the example shown in FIG. 1, the base 21 is cylindrical. In addition, it cannot be considered that the base 21 is a square pipe shape.

  For example, the conical end portion 220 (expanded diameter portion) of the shield pipe 2 is formed at each of both end portions of the shield pipe 2.

<Flexible shield member>
The flexible shield member 3 is a member that includes a metal material and is formed in a flexible cylindrical shape. A typical example of the flexible shield member 3 is a braided wire. The braided wire is a member having a structure in which a conducting wire is knitted into a cylindrical shape. The conducting wire constituting the braided wire includes, for example, a wire material mainly composed of copper and plating formed on the surface of the wire material. In addition, it is possible that the conducting wire which comprises a braided wire contains the wire which has aluminum or iron as a main component.

  It is also conceivable that the flexible shield member 3 is a member including a metal cloth rounded into a cylindrical shape. The metal cloth is a metal thread fabric. The metal cloth is, for example, a cloth having a network structure in which metal threads mainly composed of copper are woven so as to intersect in the longitudinal direction and the transverse direction. In addition, the metal cloth may have a structure in which a flexible film made of a resin material is attached to a metal yarn cloth. The metal cloth has conductivity and flexibility.

  In the flexible shield member 3, a part near one end portion 31 forms an overlapping portion 32 that covers a part of the outer peripheral surface side from the conical end portion 220 in the shield pipe 2. Thereby, the flexible shield member 3 forms a series of hollow portions together with the shield pipe 2. A series of hollow portions formed by the shield pipe 2 and the flexible shield member 3 are wiring paths of the electric wires 1.

<Connecting member>
The connecting member 4 is a member that connects a portion near the conical end portion 220 in the shield pipe 2 and the overlapping portion 32 of the flexible shield member 3, and is formed in an annular shape. The connecting member 4 sandwiches and overlaps the overlapping portion 32 of the flexible shield member 3 with the outer peripheral surface of the portion near the conical end portion 220 in the shield pipe 2. As an example in which the connecting member 4 has an annular shape, the inner peripheral surface of the connecting member 4 has an oval (rounded rectangular shape) in addition to the case where the inner peripheral surface of the connecting member 4 has an elliptical shape or a perfect circular shape. ).

  The connecting member 4 is, for example, a member whose main component is iron or copper whose surface is plated, or a member whose main component is stainless steel.

  The connecting member 4 in the present embodiment is, for example, a well-known caulking. In this case, the connecting member 4 (caulking) tightens the shield pipe 2 from the outer peripheral surface side, and the overlapping portion 32 of the flexible shield member 3 covering the outer peripheral surface near the conical end portion 220 of the shield pipe 2 is shielded. 2 between. A specific example of the connecting member 4 will be described later.

<Example of manufacturing procedure of electric wire with electromagnetic shielding parts>
Next, an example of a manufacturing procedure of the electromagnetic shielding component 5 and the electromagnetic shielding component-attached electric wire 10 will be described with reference to FIGS.

  FIG. 3 is a longitudinal sectional view of the end portion of the shield pipe 2 when the flare processing is performed. FIG. 4 is a longitudinal cross-sectional view of the electric wire 10 with electromagnetic shield component before the shield pipe 2 and the flexible shield member 3 are connected. FIG. 5 is a cross-sectional view of the electric wire 10 with an electromagnetic shield component before the shield pipe 2 and the flexible shield member 3 are connected. FIG. 6 is a cross-sectional view of the electric wire 10 with electromagnetic shield component after the shield pipe 2 and the flexible shield member 3 are connected. 3 to 6, the same constituent elements as those shown in FIGS. 1 and 2 are denoted by the same reference numerals.

  The shield pipe 2 is obtained by subjecting the end of the pipe raw material 200 having a uniform cross-sectional shape over the entire length to flare processing. As shown in FIG. 3, the flare processing is performed by inserting the forming metal fitting 9 on which the conical forming surface 90 is formed into the opening 20 at the end of the pipe raw material 200, so that the end of the pipe raw material 200 is conical. This is a process that expands into a trumpet shape.

  Further, as shown in FIG. 4, a part from the end portion 31 of the flexible shield member 3 is put on the outer peripheral surface side of the portion including the conical end portion 220 in the shield pipe 2. A portion that covers the outer peripheral surface side of the shield pipe 2 is an overlapping portion 32.

  Further, as shown in FIGS. 4 and 5, the connecting member 4 (caulking) before the shrinking process is disposed outside the overlapping portion 32 of the flexible shield member 3. In the example shown in FIGS. 4 and 6, the connecting member 4 is a metal fitting having a grip portion 40 and a processed portion 41.

  The grip portion 40 of the connecting member 4 is a portion along the outer peripheral surface of the shield pipe 2 via the overlapping portion 32 of the flexible shield member 3. The processed portion 41 is a portion that is formed continuously with the grip portion 40 and is subjected to bending deformation processing with a tool.

  When the workpiece 41 is bent in a direction in which the width thereof contracts, the diameter of the grip portion 40 connected to the workpiece 41 contracts. As a result, the gripping portion 40 is tightened from the outside of the overlapping portion 32 of the flexible shield member 3, and the overlapping portion 32 of the flexible shield member 3 is sandwiched between the shield pipe 2.

  The connection member 4 shown in FIGS. 5 and 6 has a more specific structure for making it easier to maintain the state in which the diameter of the grip portion 40 is contracted. Since the structure is described in detail in, for example, Patent Document 1, the description thereof is omitted here.

  4 to 6, the electric wire 1 is passed through the hollow portions of the shield pipe 2 and the flexible shield member 3 before the shield pipe 2 and the flexible shield member 3 are connected by the connecting member 4. . However, it is also conceivable that the electric wire 1 is passed through the hollow portion of the electromagnetic shield component 5 after the shield pipe 2 and the flexible shield member 3 are connected by the connecting member 4.

Second Embodiment
Next, an electromagnetic shield component-attached electric wire 10A according to the second embodiment will be described with reference to FIGS. FIG. 7 is a perspective view of a main part of the electric wire with electromagnetic shield part 10A. FIG. 8 is a longitudinal sectional view of the main part of the electric wire with electromagnetic shield part 10A. 7 and 8, the same components as those shown in FIGS. 1 to 6 are given the same reference numerals.

  The electromagnetic shield part-equipped electric wire 10 </ b> A is compared with the electromagnetic shield part-equipped electric wire 10 shown in FIGS. 1 and 2, the structure of the portion between the conical end portion 220 and the base portion 21 in the shield pipe, and the flexible shield member 3. The structure of the part (overlapping part) covered with the shield pipe is different. Hereinafter, the difference in the electromagnetic shield component-equipped electric wire 10A from the electromagnetic shield component-equipped electric wire 10 will be described.

  Similarly to the electromagnetic shield part-equipped electric wire 10, the electromagnetic shield part-equipped electric wire 10 </ b> A includes the electric wire 1 and an electromagnetic shield part 5 </ b> A surrounding the electric wire 1. The electromagnetic shield component 5A includes a shield pipe 2A, a flexible shield member 3, and a connecting member 4X.

  The shield pipe 2 </ b> A of the electromagnetic shielding component 5 </ b> A has a base portion 21 and a diameter-expanded portion 22 that is continuous with the base portion 21.

  The enlarged diameter portion 22 forms a part from one end of the shield pipe 2 </ b> A, and has an inner peripheral surface and an outer peripheral surface that are larger in diameter than the adjacent base portion 21. The enlarged diameter portion 22 includes a conical end portion 220 that has been subjected to flare processing, and an intermediate enlarged diameter portion 221 that connects the conical end portion 220 and the base portion 21.

  In the flexible shield member 3 of the electromagnetic shield component 5A, a part near one end portion 31 forms an overlapping portion 32A covering the outer peripheral surface side of the enlarged diameter portion 22 in the shield pipe 2A.

  The connecting member 4 </ b> X connects the enlarged diameter portion 22 of the shield pipe 2 </ b> A and the overlapping portion 32 </ b> A of the flexible shield member 3. The connecting member 4X is sandwiched between the overlapping portion 32A of the flexible shield member 3 and the outer peripheral surface of the enlarged diameter portion 22 of the shield pipe 2A. In the example shown in FIG. 8, the connecting member 4 </ b> X sandwiches and holds the overlapping portion 32 </ b> A of the flexible shield member 3 between the outer peripheral surface of the intermediate enlarged portion 221 of the shield pipe 2 </ b> A.

  The overlapping portion 32A of the flexible shield member 3 is doubled by being folded back from the portion sandwiched between the shield pipe 2A and the connecting member 4X toward the outer peripheral surface of the connecting member 4X.

  That is, the overlapping portion 32 </ b> A of the flexible shield member 3 includes the first overlapping portion 321 and the second overlapping portion 322 that are overlapped with each other via the connecting member 4 </ b> X. The first overlapping portion 321 is located inside the connecting member 4X (shield pipe 2A side), and the second overlapping portion 322 is located outside the connecting member 4X.

  Subsequently, an example of a manufacturing procedure of the electromagnetic shielding component 5A and the electromagnetic shielding component-attached electric wire 10A will be described with reference to FIGS.

  FIG. 9 is a longitudinal sectional view of the electromagnetic shielding component 5A before pipe processing. FIG. 10 is a longitudinal sectional view of the electromagnetic shielding component 5A during pipe processing. FIG. 11 is a longitudinal cross-sectional view of the electromagnetic shielding component-attached electric wire 10A during assembly. 9 to 11, the same components as those shown in FIGS. 1 to 8 are given the same reference numerals.

  The shield pipe 2A of the electromagnetic shielding component 5A is obtained by subjecting the end portion of the pipe raw material 200 having a uniform cross-sectional shape over the entire length to a process for expanding the diameter. Hereinafter, this processing is referred to as pipe diameter expansion processing.

  As shown in FIGS. 9 and 10, the pipe diameter increasing process is performed in a state where the flexible shield member 3 is overlaid on the outer peripheral surface side of the pipe raw material 200 and the connecting member 4X is overlaid on the outer side. The connecting member 4X is, for example, an annular member made of metal such as iron, copper or stainless steel on which plating is formed. Unlike the connecting member 4 (caulking) shown in FIGS. 5 and 6, the connecting member 4 does not have to have a special structure in which the diameter is changed and maintained.

  In pipe diameter expansion processing, a metal fitting 9X is used in which a diameter expansion molding surface 91 and a cone-shaped molding surface 90 having an outer diameter larger than the inner peripheral surface of the pipe raw material 200 are formed. The outer diameter of the enlarged diameter molding surface 91 is slightly larger than the diameter obtained by subtracting twice the thickness of the flexible shield member 3 from the inner diameter of the annular connecting member 4X.

  In the pipe diameter expansion process, the metal fitting 9X formed with the diameter-enlarged molding surface 91 and the cone-shaped molding surface 90 having an outer diameter larger than the inner peripheral surface of the pipe raw material 200 is used as the opening 20 at the end of the pipe raw material 200. It is processing to insert into.

  By the above-described pipe diameter expansion processing, the diameter expansion portion 22 is formed in a part from one end of the pipe raw material 200. Further, the diameter-enlarged molding surface 91 of the molding metal fitting 9X slightly increases the diameter of the connecting member 4X via the intermediate diameter-enlarged portion 221 and the flexible shield member 3. Thereby, the intermediate diameter enlarged portion 221 and the connecting member 4X sandwich and hold the flexible shield member 3.

  After pipe diameter expansion processing, the electric wire 1 is passed through the hollow portion of the shield pipe 2A. For example, as FIG. 11 shows, the electric wire 1 is passed through the hollow portion of the shield pipe 2A in a state where the flexible shield member 3 is overlapped on the outer peripheral surface side. In this case, the flexible shield member 3 is folded back from the outer peripheral surface side of the shield pipe 2A in the extending direction of the enlarged diameter portion 22 in the shield pipe 2A with reference to the portion fastened by the connecting member 4X.

  When the flexible shield member 3 is folded as described above, the flexible shield member 3 covers the periphery of the portion of the electric wire 1 extending from the opening 20 of the shield pipe 2A. Further, the folded portion of the flexible shield member 3 becomes a double overlapping portion 32A.

  According to the procedure shown above, in the process of passing the electric wire 1 through the hollow portion of the electromagnetic shield component 5A, it is not necessary to penetrate the hollow portion of the flexible shield member 3 from the end thereof.

  Note that a procedure other than the procedure shown in FIG. 11 may be adopted. For example, after the flexible shield member 3 is folded as described above, the electric wire 1 may be passed through the shield pipe 2A and the hollow portion of the flexible shield member 3 connected thereto.

<Third Embodiment>
Next, an electromagnetic shield component-attached electric wire 10B according to a third embodiment will be described with reference to FIG. FIG. 12 is a longitudinal sectional view of a main part of the electric wire 10B with electromagnetic shield component. In FIG. 12, the same components as those shown in FIGS. 1 to 11 are given the same reference numerals.

  The electric wire with electromagnetic shielding part 10B has a configuration in which the grommet 6 is added to the electric wire with electromagnetic shielding part 10A shown in FIGS. Hereinafter, the grommet 6 in the electric wire 10B with an electromagnetic shield component will be described.

  Similarly to the electromagnetic shield part-equipped electric wire 10 </ b> A, the electromagnetic shield part-equipped electric wire 10 </ b> B includes the electric wire 1 and an electromagnetic shield part 5 </ b> A surrounding the electric wire 1. The electromagnetic shield component 5A includes a shield pipe 2A, a flexible shield member 3, and a connecting member 4X.

  Furthermore, the electric wire 10B with electromagnetic shield component also includes a grommet 6 that is a non-conductive cylindrical elastic member. For example, the grommet 6 is a member whose main component is a rubber material such as rubber or elastomer.

  The grommet 6 is a member for preventing liquid from entering the flexible shield member 3 when the electric wire 10B with electromagnetic shield component is attached to a support body such as a vehicle body. The grommet 6 includes a first closing portion 61 that occupies a portion near one end thereof, a second closing portion 62 that occupies a portion closer to the other end, and an intermediate portion 63 therebetween.

  The first closing portion 61 is a portion that covers the shield pipe 2 </ b> A so as to be in close contact with the outer peripheral surface of the enlarged diameter portion 22. On the other hand, the 2nd obstruction | occlusion part 62 is covered with the frame part (not shown) formed around the opening which comprises the path | route of the electric wire 1 in a support body, for example. The frame portion is formed, for example, around the opening of a housing that houses the device to which the electric wire 1 is connected.

  In the grommet 6 in the natural state, the inner peripheral surface of the first closing portion 61 has a larger diameter than the outer peripheral surface of the base portion 21 (portion adjacent to the enlarged diameter portion 22) in the shield pipe 2A and the enlarged diameter portion 22. It is formed with a smaller diameter than the outer peripheral surface. The natural state grommet means a grommet in a state where no external force is applied.

  In the example shown in FIG. 12, the inner peripheral surface of the intermediate portion 63 connected to the first closing portion 61 is formed with a larger diameter than the outer peripheral surface of the enlarged diameter portion 22 in the shield pipe 2A. In the example shown in FIG. 12, the entire inner peripheral surface of the grommet 6 is formed with a larger diameter than the outer peripheral surface of the base portion 21 of the shield pipe 2A.

  When the electromagnetic shield component 5B is attached to a support such as a vehicle body, it is necessary to move the grommet 6 along the outer peripheral surface of the shield pipe 2A. In the operation of moving the grommet 6 along the outer peripheral surface of the shield pipe 2 </ b> A, the frictional resistance between the grommet 6 and the shield pipe 2 </ b> A is very small except when the first closing portion 61 passes through the enlarged diameter portion 22. Therefore, the grommet 6 can be moved along the shield pipe 2 </ b> A with a very small force except when the first closing portion 61 passes through the enlarged diameter portion 22.

  In the example shown in FIG. 12, the grommet 6 is temporarily fastened to the shield pipe 2 </ b> A so that the entire grommet 6 surrounds the base 21 of the shield pipe 2 </ b> A, and then the first closed portion 61 is in close contact with the outer peripheral surface of the intermediate enlarged portion 221. It is moved to the position to do.

  However, the temporary fastening state of the grommet 6 to the shield pipe 2 </ b> A may be a state where the first closing portion 61 surrounds the base portion 21 and the intermediate portion 63 surrounds the enlarged diameter portion 22.

<Effect>
In the electromagnetic shield parts 5 and 5A, the end portions of the hard shield pipes 2 and 2A containing a metal material are formed in a conical shape that is flared and spreads toward the outer peripheral surface side. Therefore, the electric wire 1 passed through the hollow portion of the shield pipes 2 and 2A is unlikely to contact the edge of the end surface of the shield pipes 2 and 2A. As a result, it is possible to prevent the electric wire 1 from being damaged by contacting the edges of the shield pipes 2 and 2A.

  Further, in the electromagnetic shield parts 5 and 5A, additional parts such as the cover of the edges of the shield pipes 2 and 2A are not necessary. Further, the annular connecting members 4 and 4X for fastening the flexible shield member 3 to the shield pipes 2 and 2A are attached to the outer peripheral surface side of the shield pipes 2 and 2A. Therefore, even if the accommodation density of the electric wire 1 in the hollow portion of the shield pipes 2 and 2A (hard pipe) is increased, the flexible shield member 3 can be connected to the shield pipes 2 and 2A without any problem.

  By the way, when the electric wire 1 is passed through the hollow part of the flexible shield member 3 such as a braided wire from the end, the electric wire 1 is easily caught on the flexible shield member 3.

  On the other hand, in the electromagnetic shielding component 5A, the overlapping portion 32A of the flexible shielding member 3 is folded back and formed in a double shape. In this case, as shown in FIG. 11, in the manufacturing process of the electromagnetic shield part-attached electric wire 10A, the flexible shield member 3 is passed through the shield pipe 2A in a state where the flexible shield member 3 overlaps the outside of the shield pipe 2A. 3 can be folded and put on the electric wire 1.

  Therefore, as described above, in the step of passing the electric wire 1 through the hollow portion of the electromagnetic shielding component 5A, it is not necessary to penetrate the hollow portion of the flexible shield member 3 from the end thereof. As a result, the electric wire 1 can be easily passed through the hollow portion of the electromagnetic shielding component 5A.

  In the electromagnetic shield component 5A, the connecting member 4X sandwiches and overlaps the overlapping portion 32A of the flexible shield member 3 with the outer peripheral surface of the enlarged diameter portion 22 in the shield pipe 2A. In this case, as shown in FIG. 10, the pipe machining process (pipe diameter machining process) for creating the enlarged diameter portion 22 of the shield pipe 2 </ b> A can also serve as the attachment process of the connecting member 4 </ b> X. Thereby, the manufacturing process of 5 A of electromagnetic shielding components can be simplified. Moreover, the flexible shield member 3 can be fastened to the shield pipe 2A by using a very simple connecting member 4X.

  If the electromagnetic shielding component 5B is employed, the grommet 6 can be moved with a very small force in the operation of moving the grommet 6 along the outer peripheral surface of the shield pipe 2A. As a result, the work of attaching the electromagnetic shielding component 5B including the grommet 6 to the support becomes easy.

<Application example>
It is conceivable that the shield pipe 2 </ b> A is applied to the electromagnetic shield component 5. In this case, it is conceivable that the connecting member 4 is attached to the outer peripheral surface side of the intermediate enlarged diameter portion 221 in the enlarged diameter portion 22 of the shield pipe 2A.

  It is also conceivable that the shield pipe 2 </ b> A and the grommet 6 are applied to the electromagnetic shield component 5.

  The electromagnetic shielding component and the electric wire with electromagnetic shielding component according to the present invention can be freely combined with each of the embodiments and application examples described above within the scope of the invention described in each claim, or each embodiment. Further, the present invention can be configured by appropriately modifying or omitting some of the application examples.

10, 10A, 10B Wire with electromagnetic shield part 1 Wire 2, 2A Shield pipe 20 Shield pipe opening 200 Pipe raw material 21 Shield pipe base 22 Shield pipe diameter expanded portion 220 Conical end portion 221 Intermediate diameter expanded portion 3 Flexible Shield member 31 Flexible shield member end 32, 32A Flexible shield member overlap portion 321 First overlap portion 322 Second overlap portion 4, 4X Connecting member 40 Grip portion 41 Worked portion 5, 5A, 5B Electromagnetic shield component 6 Grommet 61 1st closure part 62 2nd closure part 63 Intermediate part 9, 9X Metal fitting for shaping | molding 90 Cone-shaped shaping | molding surface 91 Diameter expansion shaping | molding surface

Claims (3)

Conical end that is formed in a hard cylindrical shape that contains a metal material and that is partly formed from one end, with an inner peripheral surface and an outer peripheral surface that have a larger diameter than the adjacent portion and that is flared A shield pipe having an enlarged diameter portion including a portion;
It is formed in a flexible cylindrical shape containing a metal material, and a part near one end forms an overlapping portion that covers a part of the outer peripheral surface side from the conical end portion of the shield pipe, A flexible shield member forming a hollow portion;
A connecting member that is formed in an annular shape and sandwiches and holds the overlapping portion of the flexible shield member between the shield pipe and the outer peripheral surface of the portion near the conical end portion ,
Said flexible the overlapping portion of the shield member, said folded from the sandwiched portion between the shield pipe and said coupling member to the outer circumferential surface of the connecting member is formed in a double, conductive magnetic shield part. Conical end that is formed in a hard cylindrical shape that contains a metal material and that is partly formed from one end, with an inner peripheral surface and an outer peripheral surface that have a larger diameter than the adjacent portion and that is flared A shield pipe having an enlarged diameter portion including a portion;
It is formed in a flexible cylindrical shape containing a metal material, and a part near one end forms an overlapping portion that covers a part of the outer peripheral surface side from the conical end portion of the shield pipe, A flexible shield member forming a hollow portion;
A connecting member that is formed in an annular shape and sandwiches and holds the overlapping portion of the flexible shield member between the shield pipe and the outer peripheral surface of the portion near the conical end portion,
The coupling member, said that have fastened by sandwiching the overlapping portion of the flexible shield member between the outer peripheral surface of the enlarged diameter portion in said shield pipe, conductive magnetic shield part. Conical end that is formed in a hard cylindrical shape that contains a metal material and that is partly formed from one end, with an inner peripheral surface and an outer peripheral surface that have a larger diameter than the adjacent portion and that is flared A shield pipe having an enlarged diameter portion including a portion;
It is formed in a flexible cylindrical shape containing a metal material, and a part near one end forms an overlapping portion that covers a part of the outer peripheral surface side from the conical end portion of the shield pipe, A flexible shield member forming a hollow portion;
A connecting member that is formed in an annular shape and sandwiches and holds the overlapping portion of the flexible shield member between the shield pipe and the outer peripheral surface of the portion near the conical end portion,
Non-conductive cylindrical elastic member, and in the natural state, the inner peripheral surface of the portion near one end surrounding the periphery of a portion of the shield pipe is a portion of the shield pipe that is adjacent to the enlarged diameter portion. in larger diameter than the outer peripheral surface, and further Ru comprising a grommet formed of smaller diameter than the outer peripheral surface of the enlarged diameter portion, conductive magnetic shield part.

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