JP2015201467A - Electromagnetic shield member and electromagnetic shield manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a possibility for a liquid such as water and a foreign substance from the outside such as a scattering stone to enter an electromagnetic shield member, the electromagnetic shield member being bendable and deformable.SOLUTION: An electromagnetic shield member 1 is a cylindrical metal member. The electromagnetic shield member 1 includes a bellows part 2 and a non-bellows part 3. The bellows part 2 has a bellows structure in which a projected crest portion 21 in a circumferential direction and a recessed valley portion 22 in a circumferential direction are alternately continued in a length direction. The bellows part 2 includes a portion where the crest portion 21 and the valley portion 22 are continued while being curved in the circumferential direction. The non-bellows part 3 is neighboring to the bellows part 2 in the length direction.

Description

  The present invention relates to an electromagnetic shielding member that shields electromagnetic noise and a manufacturing method thereof.

  In a wire harness mounted on a vehicle, a shielded wire may be routed along a curved path. In this case, the electromagnetic shield member is preferably a member that can be bent and deformed.

  For example, an electromagnetic shield member disclosed in Patent Document 1 can be considered as an electromagnetic shield member that can be bent and deformed. The electromagnetic shielding member shown in Patent Document 1 is a member in which a thin metal plate is formed in a cylindrical shape, and has a cut forming portion in which a cut is formed. A plurality of cuts are formed side by side in the circumferential direction of the electromagnetic shield member.

  The electromagnetic shielding member disclosed in Patent Document 1 can have a bent shape due to deformation of the cut forming portion.

JP 2013-162728 A

  However, the electromagnetic shielding member disclosed in Patent Document 1 is not suitable when a shielded electric wire is wired in a place where waterproof performance is required. This is because liquid such as water is likely to enter the electromagnetic shield member from a plurality of cuts formed in the cut forming part.

  Moreover, in the electromagnetic shielding member shown in Patent Document 1, foreign matters such as stepping stones easily enter the electromagnetic shielding member.

  It is an object of the present invention to reduce the possibility that a liquid such as water and a foreign matter such as a stepping stone enter the inside of the electromagnetic shielding member in an electromagnetic shielding member that can be bent and deformed.

  The electromagnetic shielding member according to the first aspect is a cylindrical metal member, and has a bellows structure in which convex ridges along the circumferential direction and concave valleys along the circumferential direction are alternately connected in the longitudinal direction. A bellows portion including a portion where the peak portion and the trough portion are bent along the circumferential direction, and a non-bellowal portion adjacent to the bellows portion in the longitudinal direction.

  The electromagnetic shielding member which concerns on a 2nd aspect is an aspect of the electromagnetic shielding member which concerns on a 1st aspect. In the electromagnetic shielding member according to the second aspect, a single slit along the direction from one end side to the other end side in the longitudinal direction of the electromagnetic shielding member is formed over the entire length of the electromagnetic shielding member.

  The electromagnetic shielding member according to the third aspect is an aspect of the electromagnetic shielding member according to the second aspect. In the electromagnetic shielding member according to the third aspect, the plurality of cuts respectively formed at the same position in the circumferential direction of the electromagnetic shielding member leave the maximum diameter part or the minimum diameter part in the bellows part, respectively. The slit is formed intermittently in the longitudinal direction, and the cut is formed at a position different from the slit in the circumferential direction of the electromagnetic shield member.

  The electromagnetic shielding member which concerns on a 4th aspect is an aspect of the electromagnetic shielding member which concerns on a 2nd aspect. In the electromagnetic shielding member according to the fourth aspect, each of the plurality of crests in the bellows part is formed intermittently in the longitudinal direction and has a concave shape on the outer peripheral surface side of the electromagnetic shielding member, or each of the above A plurality of the first dent portions or the plurality of first dent portions or the plurality of the first dent portions or the plurality of the first dent portions are formed in the plurality of valley portions in the bellows portion, which are intermittently formed in the longitudinal direction and have a concave shape on the inner peripheral surface side of the electromagnetic shield member. The second recessed portions are respectively formed at the same position in the circumferential direction of the electromagnetic shield member, and are formed at positions different from the slit in the circumferential direction of the electromagnetic shield member.

  The electromagnetic shielding member according to the fifth aspect is an aspect of the electromagnetic shielding member according to any one of the first aspect to the fourth aspect. The electromagnetic shielding member according to the fifth aspect further includes a conductive resin that overlaps at least a part of the inner peripheral surfaces of the bellows part and the non-bellows part or at least a part of the outer peripheral surfaces of the bellows part and the non-bellows part. A sheet material is included.

  An electromagnetic shield member manufacturing method according to a sixth aspect is an electromagnetic shield member manufacturing method for manufacturing an electromagnetic shield member having a bellows portion having a bellows structure that is formed into a cylindrical shape by bending a metal plate member and enables bending deformation. The outer peripheral surface of the first rotating body in the rotational direction includes a first convex surface and a first concave surface alternately arranged in the axial direction. An outer peripheral surface in the rotational direction of the second rotating body includes a second uneven surface in which second convex surfaces and second concave surfaces are alternately arranged in the axial direction, and the first rotating body And the second rotating body is in a state in which the second convex surface of the second rotating body faces the first concave surface of the first rotating body, and the second concave surface of the second rotating body is the first The first convex in one rotator The first concavo-convex surface of the first rotator and the second concavo-convex surface of the second rotator form a molding space by using a pair of rotationally molded members, A first step of forming a portion to be processed of the metal plate member into a shape corresponding to the forming space by passing the metal plate member through the forming space while rotating the one rotating body and the second rotating body; A second step of bending the metal plate member into a cylindrical shape.

  The electromagnetic shielding member manufacturing method according to the seventh aspect is an aspect of the electromagnetic shielding member manufacturing method according to the sixth aspect. In the electromagnetic shielding member manufacturing method according to the seventh aspect, the processing target portion of the metal plate member is formed into the forming space by performing the first step a plurality of times on the processing target portion of the metal plate member. It is molded into a shape according to

  In each of the above aspects, the electromagnetic shield member can be bent by deforming the bellows portion. Therefore, it is possible to reduce the possibility that foreign substances such as water and stepping stones enter the inside of the electromagnetic shield member.

  Moreover, in said 2nd aspect, it can retrofit with respect to the electric wire of shield object using a slit. In this case, the workability at the time of manufacture of the shielded electric wire including the electromagnetic shield member according to the second aspect is improved.

  Moreover, in said 3rd aspect, several cut | interruptions are intermittently formed in the longitudinal direction of the electromagnetic shielding member, respectively leaving the maximum diameter part or the minimum diameter part in a bellows part. In this case, the part in which the cut | interruption in the bellows part is not formed becomes easy to deform | transform. Thereby, the operation | work which opens an electromagnetic shielding member, ie, the state which separates these edge parts in the state which the edge parts which oppose on both sides of the straight slit in an electromagnetic shielding member, can be performed more easily. .

  In the fourth aspect, the electromagnetic shield member has a small distance between the opposing edges across the first recess in the peak portion of the bellows portion or the second recess portion in the valley portion of the bellows portion. It becomes easy to deform in the direction. In other words, the electromagnetic shield member is easily deformed in a direction in which edges facing each other across a single slit in the electromagnetic shield member are separated from each other. In this case, the operation of opening the electromagnetic shield member can be performed more easily.

  Moreover, in said 5th aspect, the shielding performance of an electromagnetic shielding member can be improved.

  In said 6th aspect, a 1st process and a 2nd process are performed using a pair of rotation molding member containing the 1st rotatable rotary body and the 2nd rotatable rotary body. In the first step, a corrugated shape is applied to a processing target portion of a plate-like metal member (metal plate member). In the second step, the metal plate member is bent into a cylindrical shape. In this case, an electromagnetic shield member obtained by bending the metal plate member into a cylindrical shape can be easily made.

  Moreover, in said 7th aspect, a 1st process is performed in multiple times with respect to the process target part of a metal plate member, and the process target part of a metal plate member is shape | molded by the shape according to shaping | molding space. In this case, the stress applied to the entire metal plate member can be reduced in one molding step (first step).

It is a side perspective view of electromagnetic shielding member 1 concerning a 1st embodiment. 1 is a longitudinal sectional view of an electromagnetic shield member 1. FIG. It is a figure which shows a part of process of the electromagnetic shielding member manufacturing method which concerns on 1st Embodiment, and is a side view of the metal plate member 11 and the rotational molding member 5. FIG. It is a figure which shows the one part process of the electromagnetic shielding member manufacturing method which concerns on 1st Embodiment, and is a top view of a metal plate member and a rotation molding member. It is a front view of the 1st rotary body and the 2nd rotary body in a rotation molding member. It is a figure which shows the one part process of the electromagnetic shielding member manufacturing method which concerns on 1st Embodiment, and is the side view which showed the rotation forming member and the metal plate member. It is a figure which shows the one part process of the electromagnetic shielding member manufacturing method which concerns on 1st Embodiment, and is a top view of a metal plate member and a rotation molding member. It is a figure which shows the one part process of the electromagnetic shielding member manufacturing method which concerns on 1st Embodiment, and is a perspective view of a metal plate member. It is the figure which showed the one part process in the electromagnetic shielding member manufacturing method which concerns on the application example of 1st Embodiment, and is a side view of a metal plate member and a rotational molding member. It is a side perspective view of electromagnetic shielding member 1B concerning a 2nd embodiment. It is a longitudinal cross-sectional view of 1 C of electromagnetic shielding members which concern on 3rd Embodiment. It is a front view of the 1st rotary body and the 2nd rotary body in the rotation molding member used for manufacture of electromagnetic shielding member 1C. It is a schematic perspective view of the bellows part in the inner peripheral surface side of electromagnetic shielding member 1D. It is sectional drawing of electromagnetic shielding member 1D in a 1st aspect. It is sectional drawing of electromagnetic shielding member 1D in a 2nd aspect. It is a schematic perspective view of the bellows part in the inner peripheral surface side of the electromagnetic shielding member 1E. It is sectional drawing of the electromagnetic shielding member 1E in a 1st aspect. It is sectional drawing of the electromagnetic shielding member 1E in a 2nd aspect. It is a schematic perspective view of the bellows part in the inner peripheral surface side of the electromagnetic shielding member 1F. It is sectional drawing of the electromagnetic shielding member 1F in a 1st aspect. It is sectional drawing of the electromagnetic shielding member 1F in a 2nd aspect. It is a schematic perspective view of the bellows part in the inner peripheral surface side of the electromagnetic shielding member 1G. It is sectional drawing of the electromagnetic shielding member 1G in a 1st aspect. It is sectional drawing of the electromagnetic shielding member 1G in a 2nd aspect.

<First 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. First, the electromagnetic shielding member 1 according to the first embodiment and the manufacturing method thereof will be described with reference to FIGS. The electromagnetic shielding member 1 is used in a state of surrounding the electric wire 9 to be shielded. In FIGS. 1 and 2, the electric wire 9 is drawn with a virtual line (two-dot chain line).

  The electric wire 9 is an insulated wire having, for example, a conductor mainly composed of copper or aluminum and an insulating coating covering the periphery of the conductor.

  In the example shown in FIGS. 1 and 2, the electromagnetic shield member 1 surrounds the three wires 9. In addition, when the electromagnetic shielding member 1 encloses the one electric wire 9, the case where the two electric wires 9 are enclosed, or the case where the four or more electric wires 9 are enclosed is also considered. The shielded electric wire including the electric wire 9 and the electromagnetic shielding member 1 surrounding the electric wire 9 is mounted on a vehicle such as an automobile.

<Electromagnetic shield member>
The electromagnetic shield member 1 is a cylindrical metal member. As a metal member which comprises the electromagnetic shielding member 1, lightweight and soft metals, such as aluminum, are employ | adopted, for example.

  This embodiment is an example in the case where the electromagnetic shielding member 1 is a member formed in a cylindrical shape by bending a plate-like metal member. In the example shown in FIGS. 1 and 2, the electromagnetic shield member 1 is bent into a cylindrical shape. It is also conceivable that the electromagnetic shield member 1 is a metal member forming a cylindrical body.

  The electromagnetic shield member 1 has a hollow portion 18 having a circular cross section. The hollow portion 18 is wired with the electric wire 9 to be shielded. In addition to the case where the contour of the inner peripheral surface of the electromagnetic shield member 1 is elliptical or perfect circle, the contour of the inner peripheral surface of the electromagnetic shield member 1 is oval (rounded rectangular shape). Conceivable.

  The electromagnetic shield member 1 includes a bellows part 2 and a non-bellows part 3. In the present embodiment, the electromagnetic shield member 1 is also formed with a slit 4 along the direction from one end side to the other end side in the longitudinal direction of the electromagnetic shield member 1. The longitudinal direction of the cylindrical electromagnetic shield member 1 (cylinder) is also the axial direction of the cylindrical electromagnetic shield member 1 and is also a direction orthogonal to the circumferential direction of the cylindrical electromagnetic shield member 1. .

  The present embodiment is an example in the case where the electromagnetic shield member 1 includes one bellows portion 2 and two non-bellows portions 3 adjacent to the bellows portion 2. However, the case where the electromagnetic shielding member 1 has two or more bellows parts 2 is also considered. For example, the electromagnetic shielding member 1 may be provided with a plurality of bellows portions 2 and non-bellows portions 3 formed alternately in the longitudinal direction. Further, in FIG. 1, the non-bellows part 3 is formed on both sides of the bellows part 2, but the case where this arrangement is reversed, that is, the case where the bellows part 2 is formed on both sides of the non-bellows part 3 is also considered. It is done.

<Electromagnetic shield member: bellows>
In the electromagnetic shield member 1, the bellows portion 2 includes a convex crest portion 21 along the circumferential direction of the electromagnetic shield member 1 and a concave trough portion 22 along the circumferential direction of the electromagnetic shield member 1 alternately in the longitudinal direction. It has a bellows structure.

  In the present embodiment, the peak portion 21 and the valley portion 22 are formed in a series except for a portion where a slit is formed along the circumferential direction of the electromagnetic shield member 1.

  In the present embodiment, the peak portion 21 is a portion that forms a convex shape while being curved on the outer peripheral surface side of the electromagnetic shield member 1. For example, it is conceivable that the peak portion 21 is a portion that is curved and has a convex shape on the outer peripheral surface side of the electromagnetic shield member 1, including a portion (a continuous portion) having no gap of at least a half circumference.

  In the example shown in FIGS. 1 and 2, the dimension of the peak portion 21 in the longitudinal direction of the electromagnetic shield member 1 is smaller toward the outer peripheral surface side of the electromagnetic shield member 1. Further, when the peak portion 21 is viewed from the inner peripheral surface side of the electromagnetic shield member 1, the peak portion 21 forms a groove whose opening faces the hollow portion 18 side of the electromagnetic shield member 1.

  Moreover, in this embodiment, the trough part 22 is a part which comprises the concave shape in the outer peripheral surface side of the electromagnetic shielding member 1, curving. For example, it is conceivable that the valley portion 22 is a portion that is curved and has a concave shape on the outer peripheral surface side of the electromagnetic shielding member 1, including a portion without a gap (continuous portion) of at least a half circumference.

  In the example shown in FIGS. 1 and 2, the dimension of the valley portion 22 in the longitudinal direction of the electromagnetic shield member 1 is smaller toward the inner peripheral surface side of the electromagnetic shield member 1. Further, when the valley portion 22 is viewed from the outer peripheral surface side of the electromagnetic shield member 1, the valley portion 22 forms a groove whose opening faces the outer peripheral surface side of the electromagnetic shield member 1.

  In the present embodiment, for the sake of convenience, in the radial direction of the electromagnetic shielding member 1, the portion of the peak portion 21 that protrudes to the outermost peripheral surface side is referred to as the apex portion 211, and the portion of the valley portion 22 that protrudes to the innermost peripheral surface side This is referred to as a part 221. In the present specification, a portion closer to the apex 211 than the central position of the portion connecting the apex 211 and the valley bottom 221 is referred to as a peak 21. In addition, a portion closer to the valley bottom 221 than the center position of the portion connecting the vertex 211 and the valley bottom 221 is referred to as a valley 22.

  In the present embodiment, the bellows part 2 is deformed so that the distance between the mountain parts 21 that are adjacent to each other with the valley part 22 sandwiched between the inner side in the bending direction. Further, the bellows portion 2 is deformed so that the distance between the adjacent mountain portions 21 across the valley portion 22 is increased outside the bending direction. Thereby, the electromagnetic shielding member 1 can have a bent shape.

<Electromagnetic shielding member: non-bellows part>
The non-bellows part 3 is a cylindrical part formed adjacent to the bellows part 2 in the longitudinal direction of the electromagnetic shield member 1. In the present embodiment, the non-accordion portion 3 is a portion in which portions having the same diameter are continuous in the longitudinal direction of the electromagnetic shield member 1.

  Further, unlike the bellows part 2, the non-bellows part 3 is a part that does not deform even when the electromagnetic shield member 1 has a bent shape. In the present embodiment, the non-bellows portion 3 is a portion that does not have a structure generally called a bellows structure in which large diameter portions and small diameter portions are alternately continued.

  As shown in FIG. 2, for example, a cylindrical shield connection portion 61 in the shield shell member 6 is connected to the non-accordion portion 3. The shield shell member 6 is a metal member that is connected to a housing that houses the electrical equipment to which the electric wire 9 to be shielded is connected. In FIG. 2, the shield shell member 6 is drawn with a virtual line (two-dot chain line).

  For example, the caulking member 8 such as a caulking ring or a caulking band is in the state in which the shield connecting portion 61 is in contact with the inner circumferential surface of the non-bellows portion 3 of the electromagnetic shield member 1. It is caulked from the side. Thereby, electrical connection between the electromagnetic shield member 1 and the shield shell member 6 can be achieved. In FIG. 2, the caulking member 8 is drawn with a virtual line (two-dot chain line).

<Electromagnetic shield member: slit>
A single slit 4 is formed over the entire length of the electromagnetic shield member 1. In the example shown in FIGS. 1 and 2, the slit 4 is formed in the bellows part 2 and the non-bellows part 3.

  The slits 4 are separation lines that allow a pair of edges facing each other across the single slit 4 in the electromagnetic shield member 1 to be separated with the edges facing each other.

<Electromagnetic shield member manufacturing method>
Next, the electromagnetic shielding member manufacturing method according to the present embodiment will be described with reference to FIGS. The electromagnetic shielding member manufacturing method according to the present embodiment is an example of a manufacturing method of the electromagnetic shielding member 1. In the electromagnetic shielding member manufacturing method according to the present embodiment, it is possible to obtain the electromagnetic shielding member 1 having the bellows portion 2 that is formed into a cylindrical shape by bending the metal plate member 11 and enables bending deformation.

  The electromagnetic shielding member manufacturing method according to the present embodiment bends the first step and the metal plate member 11 which are performed using the rotationally molded member 5 including the rotatable first rotating body 51 and the second rotating body 52 into a cylindrical shape. A second step.

  FIG. 3 is a diagram showing a part of the process of the electromagnetic shielding member manufacturing method according to the present embodiment, and is a side view of the metal plate member 11 and the rotational molding member 5. In FIG. 3, a direction in which the metal plate member 11 is passed between the first rotating body 51 and the second rotating body 52 of the rotational molding member 5 is indicated by an arrow U.

  FIG. 4 is a view showing a part of the process of the electromagnetic shielding member manufacturing method according to the present embodiment, and is a plan view of the metal plate member 11 and the rotational molding member 5.

  FIG. 5 is a diagram of the first rotator 51 and the second rotator 52 as seen from the direction in which the metal plate member 11 is passed (direction of arrow U).

  FIG. 6 is a view showing a part of the process of the electromagnetic shield member manufacturing method according to the present embodiment, and is a side view showing the rotationally formed member 5 and the metal plate member 11 passing through the same.

  FIG. 7 is a view showing a part of the process of the electromagnetic shielding member manufacturing method according to the present embodiment, and is a plan view of the metal plate member 11 and the rotational molding member 5.

  FIG. 8 is a perspective view of the metal plate member 11, showing some steps of the electromagnetic shielding member manufacturing method according to the present embodiment.

<Electromagnetic shield member: Metal plate member>
First, the metal plate member 11 will be described. In the present embodiment, the metal plate member 11 is a sheet-like metal member. As the metal plate member 11, for example, a light and soft metal such as aluminum is employed.

  As shown in FIG. 3, a flat metal plate member 11 is employed in the present embodiment. However, it may be considered that the metal plate member 11 has a curved shape in advance. Details will be described later.

<Electromagnetic shield member manufacturing method: rotationally molded member>
Next, the rotational molding member 5 including the first rotating body 51 and the second rotating body 52 will be described. In this embodiment, the 1st rotary body 51 and the 2nd rotary body 52 are rotatably supported, and are an example of the metal mold | die for attaching | subjecting the metal plate member 11 with a waveform. For example, as FIG. 3-7 shows, the 1st rotary body 51 and the 2nd rotary body 52 are roller-shaped metal mold | dies.

  As shown in FIGS. 3 and 5, the outer peripheral surface in the rotational direction of the first rotating body 51 is the first in which the first convex surface 511 and the first concave surface 512 are alternately arranged in the axial direction of the first rotating body 51. An uneven surface 510 is included. This embodiment is an example in the case where three first convex surfaces 511 and two first concave surfaces 512 are formed on the first rotating body 51 as shown in FIG. In the present embodiment, the rotation direction of the first rotating body 51 means the circumferential direction of the first rotating body 51. The axial direction of the first rotating body 51 is a direction that passes through the center of rotation of the first rotating body 51 and is orthogonal to the rotating direction of the first rotating body 51.

  The first convex surface 511 in the first rotating body 51 is convex on the outer peripheral surface side of the first rotating body 51 while being curved. In the present embodiment, the first convex surface 511 of the first rotating body 51 is a convex shape formed such that the dimension of the first convex surface 511 in the axial direction of the first rotating body 51 decreases toward the outer peripheral surface side. Surface.

  Further, the first concave surface 512 of the first rotating body 51 is concave while being curved on the outer peripheral surface side of the first rotating body 51. In the present embodiment, the first concave surface 512 of the first rotating body 51 is a concave surface formed such that the dimension of the first concave surface 512 in the axial direction of the first rotating body 51 increases toward the outer peripheral surface side. It is. Therefore, in this embodiment, in the cross section along the axial center direction of the 1st rotary body 51, the 1st uneven surface 510 has a waveform.

  Further, the outer peripheral surface in the rotation direction of the second rotating body 52 includes second uneven surfaces 520 in which the second convex surfaces 521 and the second concave surfaces 522 are alternately arranged in the axial direction of the second rotating body 52. This embodiment is an example in the case where two second convex surfaces 521 and three second concave surfaces 522 are formed on the second rotating body 52, as shown in FIG. In the present embodiment, the rotation direction of the second rotator 52 means the circumferential direction of the second rotator 52. The axial direction of the second rotating body 52 is a direction that passes through the center of rotation of the second rotating body 52 and is orthogonal to the rotating direction of the second rotating body 52.

  The second convex surface 521 of the second rotator 52 is convex on the outer peripheral surface side of the second rotator 52 while being curved. In this embodiment, the 2nd convex surface 521 in the 2nd rotary body 52 is the convex shape formed so that the dimension of the 2nd convex surface 521 in the axial center direction of the 2nd rotary body 52 may become so small that it goes to an outer peripheral surface side. Surface.

  Further, the second concave surface 522 of the second rotating body 52 is concave on the outer peripheral surface side of the second rotating body 52 while being curved. In the present embodiment, the second concave surface 522 of the second rotating body 52 is a concave surface formed such that the dimension of the second concave surface 522 in the axial direction of the second rotating body 52 increases toward the outer peripheral surface side. It is. Therefore, in this embodiment, in the cross section along the axial center direction of the 2nd rotary body 52, the 2nd uneven surface 520 has a wave shape.

  The first rotating body 51 and the second rotating body 52 are in a state in which the second convex surface 521 of the second rotating body 52 faces the first concave surface 512 of the first rotating body 51 and the second rotating body 52. The concave surface 522 is disposed so as to face the first convex surface 511 of the first rotating body 51. Thereby, the molding space 50 formed by the first uneven surface 510 of the first rotating body 51 and the second uneven surface 520 of the second rotating body 52 is formed.

  In the present embodiment, when the outer circumferential surface of the first rotating body 51 and the outer circumferential surface of the second rotating body 52 are arranged to face each other, the first uneven surface 510 of the first rotating body 51 and the second rotating body. The forming space 50 formed by the second uneven surface 520 of 52 is a wave-shaped space when viewed from the direction (direction of arrow U) through which the metal plate member 11 passes.

<Electromagnetic shielding member manufacturing method: first step and second step>
The first step in the electromagnetic shielding member manufacturing method is to pass the metal plate member 11 through the forming space 50 while rotating the first rotary body 51 and the second rotary body 52, thereby forming the processing target portion 110 of the metal plate member 11. This is a step of making the shape according to the molding space 50. Moreover, the 2nd process in an electromagnetic shielding member manufacturing method is a process of bending the metal plate member 11 to a cylinder shape. This embodiment is an example in the case where at least a part of the second step is performed in the middle of the first step. Hereinafter, each step will be described.

  The processing target portion 110 of the metal plate member 11 is a portion that is processed into a shape corresponding to the forming space 50 by the rotational forming member 5. In the present embodiment, the processing target portion 110 is a strip-like portion formed across the metal plate member 11, and is formed at one location on the metal plate member 11. However, it is also conceivable that the processing target portion 110 is formed at a plurality of locations on the metal plate member 11. 3, 4, and 7, a halftone dot is attached to the processing target portion 110.

  In the present embodiment, the metal plate member 11 is passed through the forming space 50 of the rotary forming member 5 along the arrow U in the first step. At this time, the 1st rotary body 51 and the 2nd rotary body 52 in the rotation molding member 5 are rotating, respectively. When the metal plate member 11 passes through the forming space 50, the metal plate member 11 is plastically deformed and formed into a shape corresponding to the shape of the forming space 50, in this embodiment, a wave shape.

  In the first step, it is also conceivable that the same portion in the processing target portion 110 of the metal plate member 11 is passed through the forming space 50 of the rotary forming member 5 a plurality of times along the arrow U. Further, for example, the interval between the first uneven surface 510 of the first rotating body 51 and the second uneven surface 520 of the second rotating body 52 is narrowed every time the metal plate member 11 is passed through the rotational molding member 5. It is also possible to do. In this case, the processing target portion 110 in the metal plate member 11 is gradually formed into the shape of the bellows portion 2 of the electromagnetic shield member 1, which is a wave shape in the present embodiment, as the number of times of passing through the forming space 50 is increased. The

  In the electromagnetic shielding member manufacturing method according to the present embodiment, the first step is performed a plurality of times on the processing target portion 110 of the metal plate member 11. In the present embodiment, the first step is performed on a part of the processing target portion 110 of the metal plate member 11 in the longitudinal direction. The vertical direction is the surface direction of the metal plate member 11 and means a direction orthogonal to the direction of the arrow U.

  For example, as shown in FIGS. 3 and 4, a part of the processing target portion 110 of the metal plate member 11 is passed through the forming space 50 of the rotary forming member 5. Then, when the metal plate member 11 passes through the forming space 50 of the rotary forming member 5, a part of the processing target portion 110 of the metal plate member 11 is formed into a wave shape. In the example shown by FIGS. 5-7, a part of the process target part 110 of the metal plate member 11 is shape | molded by the waveform which has at least 3 peak (valley).

  Thereafter, the metal plate member 11 or the rotationally formed member 5 is moved in the vertical direction so that the portion of the metal plate member 11 which is already formed into a shape corresponding to the forming space 50 in the processing target portion 110 is adjacent to the portion in the vertical direction On the other hand, said 1st process is further performed once or several times. In the present embodiment, by repeating this operation, the entire processing target portion 110 of the metal plate member 11 is formed into a wave shape.

  In the present embodiment, the metal plate member 11 is curved from a flat shape by passing the metal plate member 11 through the forming space 50 of the rotary forming member 5 including the first rotating body 51 and the second rotating body 52 that rotate. The shape is deformed. That is, a part of the second step is performed in the middle of the first step.

  For example, the metal plate member 11 may be deformed from a flat shape to a curved shape by utilizing the difference between the rotational speed of the first rotating body 51 and the rotating speed of the second rotating body 52. In this case, the metal plate member 11 that has passed through the forming space 50 is curved along the outer peripheral surface of the first rotating body 51 and the second rotating body 52 that has a higher rotational speed. In addition, it is conceivable to use the rotational molding member 5 including the first rotating body 51 and the second rotating body 52 having different diameters. In this case, the metal plate member 11 that has passed through the forming space 50 bends along the outer peripheral surface of the first rotating body 51 and the second rotating body 52 that has the smaller diameter.

  In the present embodiment, the portion 110 to be processed in the metal plate member 11 that has undergone the first step is formed into a wave shape. Moreover, as shown in FIG. 8, in this embodiment, the flat metal plate member 11 is deformed into a slightly curved shape by performing a part of the second step in the middle of the first step. . In the present embodiment, the remaining second step is performed on the slightly curved metal plate member 11.

  For example, a force is applied to the metal plate member 11 in a direction in which the pair of edge portions 111 in the direction in which the processing target portion 110 crosses approaches each other. Thereby, the metal plate member 11 is bent into a cylindrical shape, and the electromagnetic shielding member 1 is obtained. In addition, this embodiment is an example in the case where the gap between the pair of edge portions 111 in the metal plate member 11 forms the slit 4 in the cylindrical electromagnetic shield member 1.

  In the present embodiment, a part of the second step is performed in the middle of the first step, and the remaining second step is performed after the first step. However, it is also conceivable that a part of the second step is performed in the middle of the first step and the other second step is performed before and after the first step. This will be described later.

<Effect>
In the present embodiment, the electromagnetic shield member 1 can be bent by deforming the bellows portion 2. Therefore, it is possible to reduce the possibility that liquids such as water and foreign matters such as stepping stones enter the hollow portion 18 of the electromagnetic shield member 1.

  In this embodiment, even if the bellows part 2 is deformed, the non-bellows part 3 maintains its cylindrical shape. The electromagnetic shielding member 1 is effective when the electric wire 9 is wired along a path in which a straight portion and a curved portion are mixed, such as when the electric wire 9 to be shielded is wired under the floor of an automobile.

  Moreover, in this embodiment, it can be retrofitted with respect to the electric wire 9 to be shielded using the slit 4. In this case, workability at the time of manufacturing a shielded wire including the wire 9 and the electromagnetic shield member 1 is improved. When the vehicle is mounted, the slit 4 in the electromagnetic shield member 1 is in a closed state. Therefore, the possibility that liquids such as water and foreign substances such as stepping stones enter the hollow portion 18 of the electromagnetic shield member 1 from the slit 4 is lower than before.

  By the way, as a forming method of the cylindrical metal member having the bellows structure, for example, vacuum forming is conceivable. However, when the thickness of the cylindrical metal member is thin, it is difficult to make a metal member having a desired bellows structure by vacuum forming. This is because in vacuum forming, if the thickness of the cylindrical metal member is thin, it is likely to cause a disadvantage that it is deformed or broken beyond a desired shape.

  In the present embodiment, for example, the metal plate member 11 can be prevented from being excessively deformed or broken by a simple operation of changing the interval between the pair of rotational molding parts 5. In this case, the electromagnetic shield member 1 having a bellows structure and a thin wall thickness can be made more easily than in the past.

  Moreover, in this embodiment, a part of 2nd process is performed in the middle of a 1st process. That is, when the metal plate member 11 passes through the forming space 50 of the rotary forming member 5, the metal plate member 11 is bent into a slightly curved shape. Then, the remaining second step is performed on the metal plate member 11. In this case, it is possible to easily make the electromagnetic shielding member 1 obtained by bending the metal plate member 11 into a cylindrical shape.

  Moreover, in this embodiment, the 1st process is performed in multiple times with respect to the process target part 110 of the metal plate member 11, and the process target part 110 of the metal plate member 11 is shape | molded by a waveform. In this case, the stress applied to the entire metal plate member 11 can be reduced in one molding step (first step).

  Moreover, in this embodiment, the non-accordion part 3 is formed in the end part of the electromagnetic shielding member 1. In this case, the contact area between the shield connecting portion 61 of the shield shell member 6 and the inner peripheral surface of the end portion of the electromagnetic shield member 1 can be increased. Thereby, the electromagnetic shielding member 1 and the shield shell member 6 can be more electrically connected.

<Application example of the first embodiment>
Next, an application example of the electromagnetic shielding member manufacturing method according to the first embodiment will be described with reference to FIG. The electromagnetic shielding member manufacturing method according to this application example is different from the first embodiment in that a part of the second step is performed even before the start of the first step. By performing a part of the second step before the start of the first step, the first step is performed on the metal plate member 11A having a slightly curved shape.

  FIG. 9 is a diagram illustrating a part of the process in the electromagnetic shielding member manufacturing method according to this application example, and is a side view of the metal plate member 11 </ b> A and the rotational molding member 5. In FIG. 9, the same components as those shown in FIGS. 1 to 8 are given the same reference numerals. Hereinafter, differences from the first embodiment in this application example will be described.

  In this application example, the metal plate member 11A already has a curved shape at the start of the first step. This is because a part of the second step is performed before the start of the first step.

  It is conceivable that the remaining second step is performed while the metal plate member 11 </ b> A passes through the forming space 50 of the rotary forming member 5. Further, the remaining second step may be performed while the metal plate member 11 </ b> A passes through the molding space 50 of the rotational molding member 5, and may also be performed after passing through the molding space 50 of the rotational molding member 5. . In either case, the cylindrical electromagnetic shield member 1 can be obtained.

Second Embodiment
Next, the electromagnetic shielding member 1B according to the second embodiment will be described with reference to FIG. The electromagnetic shielding member 1B further includes a sheet material 19 containing a conductive resin that overlaps at least a part of the inner peripheral surfaces of the bellows part 2 and the non-bellows part 3 or at least a part of the outer peripheral surfaces of the bellows part 2 and the non-bellows part 3. Is provided.

  FIG. 10 is a side perspective view of the electromagnetic shielding member 1B according to the present embodiment. In FIG. 10, the same components as those shown in FIGS. 1 to 9 are given the same reference numerals. Hereinafter, the difference between the electromagnetic shielding member 1B and the electromagnetic shielding member 1 will be described.

  In the electromagnetic shielding member 1B, as the sheet material 19 containing a conductive resin, for example, conductive rubber can be considered. When the sheet material 19 containing a conductive resin is a conductive rubber, the sheet material 19 may contain silver powder as a material.

  The example shown in FIG. 10 is an example in the case where the electromagnetic shielding member 1 </ b> B includes a sheet material 19 that covers the bellows part 2 and a part of the non-bellows part 3. In this case, the sheet material 19 is formed in a cylindrical shape and is formed over the entire circumference of the outer peripheral surface of the electromagnetic shield member 1B.

  For example, the case where the sheet | seat material 19 is adhere | attached on the outer peripheral surface of the electromagnetic shielding member 1B with the adhesive agent can be considered. In this case, a case where a conductive adhesive is employed as the adhesive may be considered.

  A case where a part of the sheet material 19 is in contact with the electromagnetic shield member 1B without using an adhesive is also conceivable. In this case, the sheet material 19 is also grounded by grounding the electromagnetic shield member 1B. It is also conceivable that the electromagnetic shield member 1B and the sheet material 19 are individually grounded.

  Also in this embodiment, the same effect as that of the first embodiment can be obtained. In the present embodiment, the shielding performance of the electromagnetic shielding member 1B can be further improved.

<Application Example of Second Embodiment>
A case where the sheet material 19 is bonded to the inner peripheral surface of the electromagnetic shielding member 1B is also conceivable. Moreover, the case where the sheet | seat material 19 is adhere | attached on both the inner peripheral surface of the electromagnetic shielding member 1B and an outer peripheral surface is also considered. Moreover, the case where the sheet | seat material 19 is affixed on both the outer peripheral surface of the electromagnetic shielding member 1B, an internal peripheral surface, or both the outer peripheral surface and the internal peripheral surface with adhesive tape etc. instead of an adhesive agent is also considered.

  Moreover, the case where the sheet | seat material 19 is formed in the range covering the full length of the electromagnetic shielding member 1B is also considered. Moreover, the case where the sheet | seat material 19 is formed only in the bellows part 2 in the electromagnetic shielding member 1B, or the case where it forms only in the non-bellows part 3 in the electromagnetic shielding member 1B is also considered.

  Moreover, the case where the sheet | seat material 19 is not formed in the cylinder shape is also considered. For example, the case where the sheet | seat material 19 is formed only in the one part range in the circumferential direction of the electromagnetic shielding member 1B can be considered.

  Further, in the production of the electromagnetic shielding member 1B, there may be a case where the electromagnetic shielding member 1B is obtained by bending the metal plate member 11 in a state where the sheet material 19 is bonded or pasted into a cylindrical shape.

<Third Embodiment>
Next, the electromagnetic shielding member 1C according to the third embodiment will be described with reference to FIGS. 1 C of electromagnetic shielding members which concern on this embodiment are provided with the bellows part 2C of the structure different from the bellows part 2 in the electromagnetic shielding member 1. FIG. FIG. 11 is a longitudinal sectional view of the electromagnetic shielding member 1C. FIG. 12 is a view of the rotationally formed member 5C used for manufacturing the electromagnetic shield member 1C as seen from the direction in which the metal plate member 11 is passed. 11 and 12, the same components as those shown in FIGS. 1 to 10 are given the same reference numerals. Hereinafter, the difference between the electromagnetic shielding member 1C and the electromagnetic shielding member 1 will be described.

  In this embodiment, the maximum diameter portion of the peak portion 21C of the bellows portion 2C of the electromagnetic shield member 1C, that is, the apex portion 211C has a width in the longitudinal direction of the electromagnetic shield member 1C. In addition, the minimum diameter portion of the valley portion 22C of the bellows portion 2C, that is, the valley bottom portion 221C also has a width in the longitudinal direction of the electromagnetic shield member 1C. In this case, in the cross section along the longitudinal direction of the electromagnetic shielding member 1C, the outer peripheral surfaces of the vertex portion 211C and the valley bottom portion 221C are flat.

  A rotational molding member 5C shown in FIG. 12 is an example of a mold used for manufacturing the electromagnetic shielding member 1C. The rotational molding member 5C includes a first rotating body 51C and a second rotating body 52C.

  In this embodiment, the 1st convex surface 511C in the 1st rotary body 51C comprises convex shape in the outer peripheral surface side of the 1st rotary body 51C, and the flat surface is formed in the front-end | tip. Further, the first concave surface 512C of the first rotating body 51C has a concave shape on the outer peripheral surface side of the first rotating body 51C, and a flat surface is formed at the deepest portion thereof.

  Therefore, this embodiment is an example in the case where the shape of the first uneven surface 510C is a rectangular wave shape in the cross section along the axial direction of the first rotating body 51C.

  In this embodiment, the 2nd convex surface 521C in the 2nd rotary body 52C comprises convex shape in the outer peripheral surface side of the 2nd rotary body 52C, and the flat surface is formed in the front-end | tip. The second concave surface 522C in the second rotating body 52C has a concave shape on the outer peripheral surface side of the second rotating body 52C, and a flat surface is formed at the deepest portion thereof. Therefore, this embodiment is an example in the case where the shape of the second uneven surface 520C is a rectangular wave shape in the cross section along the axial direction of the second rotating body 52C.

  In the present embodiment, the forming space 50C formed by the first uneven surface 510C of the first rotating body 51C and the second uneven surface 520C of the second rotating body 52C is the direction in which the metal plate member 11 passes (the direction of the arrow U). ) Is a rectangular wave-like space. The electromagnetic shielding member 1 </ b> C can be obtained through the first step and the second step performed using the rotational molding member 5 </ b> C.

  Also in this embodiment, the same effect as that of the first embodiment can be obtained.

<First Application Example of Third Embodiment>
Next, the electromagnetic shielding member 1D according to the first application example of the third embodiment will be described with reference to FIGS. The electromagnetic shield member 1D is different from the electromagnetic shield member 1C in that a cut 4D is further formed.

  FIG. 13 is an enlarged view of a part of the bellows portion 2C as viewed from the inner peripheral surface side of the electromagnetic shield member 1D. In FIG. 13, for convenience, only a part of the bellows portion 2C in the circumferential direction is drawn.

  FIG. 14 is a cross-sectional view of the electromagnetic shielding member 1D in the first aspect. FIG. 14 illustrates the electromagnetic shielding member 1D in a state where the opposing edges sandwiching the single slit 4 in the electromagnetic shielding member 1D are in contact with each other.

  FIG. 15 is a cross-sectional view of the electromagnetic shielding member 1D in the second embodiment. FIG. 15 illustrates the electromagnetic shielding member 1D in a state where the opposing edges are separated from each other with the single slit 4 in the electromagnetic shielding member 1D interposed therebetween.

  In addition, in FIGS. 13-15, the same referential mark is attached | subjected to the same component as the component shown by FIGS.

  As FIG. 13 shows, several cut | interruption 4D is each formed in the same position in the circumferential direction of electromagnetic shielding member 1D. These cuts 4D are formed at positions different from the slits 4 in the circumferential direction of the electromagnetic shield member 1D.

  In the present embodiment, the plurality of cuts 4D are intermittently formed in the longitudinal direction of the electromagnetic shield member 1D, leaving the maximum diameter portion (vertex portion 211C) in the bellows portion 2C. In other words, in the example shown in FIG. 13, the cut 4D is formed in a portion other than the vertex portion 211 and the valley portion 22C in the peak portion 21C.

  In the electromagnetic shielding member 1D, the apex portion 211C of the peak portion 21C of the bellows portion 2C is easily bent toward the inner peripheral surface side. Thereby, it becomes possible to open the electromagnetic shielding member 1D more easily.

  In addition, the case where the vertex part 211C is further formed at the same position as the cut 4D in the circumferential direction of the electromagnetic shield member 1D and formed along the longitudinal direction of the electromagnetic shield member 1D is also conceivable. In this case, the vertex portion 211C is more easily bent on the inner peripheral surface side.

<Second application example of the third embodiment>
Next, an electromagnetic shielding member 1E according to a second application example of the third embodiment will be described with reference to FIGS. The electromagnetic shield member 1E is different from the electromagnetic shield member 1C in that a cut 4E is further formed.

  FIG. 16 is an enlarged perspective view of a part of the bellows portion 2C as viewed from the inner peripheral surface side of the electromagnetic shield member 1E. In FIG. 16, for convenience, only a part of the bellows portion 2C in the circumferential direction is drawn.

  FIG. 17 is a cross-sectional view of the electromagnetic shielding member 1E in the first aspect. FIG. 17 illustrates the electromagnetic shield member 1E in a state in which edges facing each other across the slit 4 in the electromagnetic shield member 1E are in contact with each other.

  FIG. 18 is a cross-sectional view of the electromagnetic shielding member 1E in the second embodiment. FIG. 18 shows the electromagnetic shielding member 1E in a state where the edges facing each other across the single slit 4 in the electromagnetic shielding member 1E are separated from each other.

  16-18, the same component as the component shown by FIGS. 1-15 is attached | subjected with the same referential mark. Hereinafter, a difference in the electromagnetic shield member 1E from the electromagnetic shield member 1C will be described.

  As FIG. 15 shows, the some cut | interruption 4E is each formed in the same position in the circumferential direction of the electromagnetic shielding member 1E. These cuts 4E are formed at positions different from the slits 4 in the circumferential direction of the electromagnetic shield member 1E.

  In the present embodiment, the plurality of cuts 4E are intermittently formed in the longitudinal direction of the electromagnetic shield member 1E, leaving the smallest diameter portion (valley bottom 221C) in the bellows portion 2C. In other words, in the example shown in FIG. 15, the cut 4E is formed in a part other than the valley bottom part 221C in the peak part 21C and the valley part 22C.

  In the electromagnetic shielding member 1E, the valley bottom portion 221C of the valley portion 22C of the bellows portion 2C is easily bent toward the inner peripheral surface side. Thereby, it becomes possible to open the electromagnetic shielding member 1E more easily.

  In addition, the case where the crease | fold along the longitudinal direction of the electromagnetic shielding member 1E formed in the same position as the cut | interruption 4E in the circumferential direction of the electromagnetic shielding member 1E is considered further in the valley bottom part 221C. In this case, the valley bottom 221 </ b> C is easily bent at the inner peripheral surface side.

<Third application example of the third embodiment>
Next, an electromagnetic shielding member 1F according to a third application example of the third embodiment will be described with reference to FIGS. The electromagnetic shielding member 1F is different from the electromagnetic shielding member 1C in that a first concave portion 7F having a concave shape is formed on the inner peripheral surface side of the electromagnetic shielding member 1F.

  FIG. 19 is an enlarged view of a part of the bellows portion 2C as viewed from the inner peripheral surface side of the electromagnetic shield member 1F. In FIG. 19, for convenience, only a part of the bellows portion 2C in the circumferential direction is drawn.

  FIG. 20 is a cross-sectional view of the electromagnetic shielding member 1F in the first aspect. FIG. 20 illustrates the electromagnetic shield member 1F in a state where the opposing edges sandwiching the slit 4 in the electromagnetic shield member 1F are in contact with each other.

  FIG. 21 is a cross-sectional view of the electromagnetic shielding member 1F in the second aspect. FIG. 21 illustrates the electromagnetic shield member 1F in a state where the opposing edges are separated from each other with the single slit 4 in the electromagnetic shield member 1F interposed therebetween.

  In addition, in FIGS. 19-21, the same referential mark is attached | subjected to the same component as the component shown by FIGS. Hereinafter, a difference in the electromagnetic shielding member 1F from the electromagnetic shielding member 1C will be described.

  As FIG. 19 shows, the several 1st dent part 7F is each formed in the same position in the circumferential direction of the electromagnetic shielding member 1F. These first recessed portions 7F are formed at positions different from the slits 4 in the circumferential direction of the electromagnetic shield member 1F.

  In the present embodiment, the plurality of first dent portions 7F are intermittently formed in the longitudinal direction in the plurality of valley portions 22C in the bellows portion 2C. Moreover, in this embodiment, the 1st dent part 7F is a dent along the longitudinal direction of the electromagnetic shielding member 1F, and is formed over the full length in the longitudinal direction of the electromagnetic shielding member 1F of one trough part 22C.

  In addition, it is also considered that the 1st dent part 7F is formed also in the non-accordion part 3 of the electromagnetic shielding member 1F. However, it is also conceivable that the first dent 7F is formed only in the bellows 2C of the electromagnetic shield member 1F.

  The electromagnetic shield member 1F is formed between the portions facing each other across the first recess 7F in the valley 22C of the bellows 2C by changing the height of the valley 22C at the portion where the first recess 7F is formed. It becomes easy to deform in the direction of decreasing the distance. That is, in the electromagnetic shield member 1F, the portion where the first recess 7F in the valley portion 22C of the bellows portion 2C is easily bent toward the inner peripheral surface side. Thereby, it becomes possible to open the electromagnetic shielding member 1F more easily.

  In addition, the case where the crease | fold along the longitudinal direction of the electromagnetic shielding member 1F is further formed in the 1st dent part 7F is also considered. For example, the case where the crease | fold which makes a concave shape in the internal peripheral surface of the electromagnetic shielding member 1F is formed in the 1st dent part 7F can be considered. In this case, the 1st dent part 7F becomes easy to bend by the inner peripheral surface side.

<Fourth application example of the third embodiment>
Next, an electromagnetic shielding member 1G according to a fourth application example of the third embodiment will be described with reference to FIGS. The electromagnetic shield member 1G is different from the electromagnetic shield member 1C in that a second recessed portion 7G having a concave shape is formed on the inner peripheral surface side of the electromagnetic shield member 1G.

  FIG. 22 is an enlarged view of a part of the bellows portion 2C viewed from the inner peripheral surface side of the electromagnetic shield member 1G. In FIG. 22, only a part of the bellows portion 2C in the circumferential direction is drawn for convenience.

  FIG. 23 is a cross-sectional view of the electromagnetic shielding member 1G in the first aspect. FIG. 23 illustrates the electromagnetic shielding member 1G in a state where the opposing edges sandwiching the single slit 4 in the electromagnetic shielding member 1G are in contact with each other.

  FIG. 24 is a cross-sectional view of the electromagnetic shielding member 1G in the second embodiment. In FIG. 24, the electromagnetic shielding member 1G in a state where the edges facing each other across the slit 4 in the electromagnetic shielding member 1G are separated from each other is depicted.

  22 to 24, the same components as those shown in FIGS. 1 to 21 are denoted by the same reference numerals. Hereinafter, the difference of the electromagnetic shielding member 1G from the electromagnetic shielding member 1C will be described.

  As FIG. 22 shows, the several 2nd dent part 7G is each formed in the same position in the circumferential direction of 1 G of electromagnetic shielding members. These second recessed portions 7G are formed at positions different from the slits 4 in the circumferential direction of the electromagnetic shield member 1G.

  In the present embodiment, the plurality of second dent portions 7G are intermittently formed in the longitudinal direction in the plurality of peak portions 21C in the bellows portion 2C. Moreover, in this embodiment, the 2nd dent part 7G is a dent along the longitudinal direction of the electromagnetic shielding member 1G, and is formed over the full length in the longitudinal direction of the electromagnetic shielding member 1F of one peak part 21C.

  It is also conceivable that the second recessed portion 7G is also formed in the non-bellows portion 3 of the electromagnetic shield member 1G. However, it is also conceivable that the second recessed portion 7G is formed only in the bellows portion 2C of the electromagnetic shield member 1G.

  The electromagnetic shielding member 1G is also easily deformed in a direction in which the distance between the opposing portions sandwiching the second recessed portion 7G in the peak portion 21C of the bellows portion 2C is reduced. That is, in the electromagnetic shielding member 1G, the portion where the second recessed portion 7G in the peak portion 21C of the bellows portion 2C is easily bent toward the inner peripheral surface side. Thereby, it becomes possible to open the electromagnetic shielding member 1G more easily.

  In addition, the case where the crease | fold along the longitudinal direction of the electromagnetic shielding member 1G is further formed in the 2nd dent part 7G is also considered. For example, the case where the crease | fold which makes a concave shape in the outer peripheral surface of the electromagnetic shielding member 1G is formed in the 2nd recessed part 7G can be considered. In this case, the 2nd dent part 7G becomes easy to bend by the inner peripheral surface side.

<Other application examples>
A case where the cuts 4D and 4E are applied to the electromagnetic shield member 1 according to the first embodiment is also conceivable. Moreover, the case where the 1st dent part 7F or the 2nd dent part 7G is applied to the electromagnetic shielding member 1 which concerns on 1st Embodiment is also considered.

  In addition, the electromagnetic shielding member and the electromagnetic shielding member manufacturing method according to the present invention are within the scope of the invention described in each claim, and each of the above-described embodiments, application examples of each embodiment, and other application examples. It is also possible to combine freely, or to configure each embodiment, an application example of each embodiment, and other application examples as appropriate, or by omitting a part thereof.

DESCRIPTION OF SYMBOLS 1 Electromagnetic shield member 11 Metal plate member 110 Processing object part 111 Edge part 11A Metal plate member 18 Hollow part 19 Sheet material 1B Electromagnetic shield member 1C Electromagnetic shield member 1D Electromagnetic shield member 1E Electromagnetic shield member 1F Electromagnetic shield member 1G Electromagnetic shield member 2 Bellow part 21 Mountain part 211 Vertex part 211C Vertex part 21C Mountain part 22 Valley part 221 Valley bottom part 221C Valley bottom part 22C Valley part 2C Bellow part 3 Non-bellow part 4 Slit 4D Cut 4E Cut 5 Rotating molding member 50 Molding space 50C Molding space 51 First rotating body 510 First uneven surface 510C First uneven surface 511 First convex surface 511C First convex surface 512 First concave surface 512C First concave surface 51C First rotary body 52 Second rotary body 520 Second concave and convex surface 520C Second concave and convex surface 521 Second convex surface 521C Second convex surface 5 2 second concave 522C second concave 52C second rotating member 5C rotomolding member 6 shield shell member 61 second recess first recess 7G shield connecting portion 7F 8 caulking member 9 wire U arrow

Claims (7)

A cylindrical metal member,
Convex ridges along the circumferential direction and concave valleys along the circumferential direction have a bellows structure alternately connected in the longitudinal direction, and the ridges and the valleys bend along the circumferential direction. A bellows part including a continuous part,
An electromagnetic shielding member comprising: a non-bellows portion adjacent to the bellows portion in the longitudinal direction. The electromagnetic shielding member according to claim 1,
An electromagnetic shielding member in which a single slit along the direction from one end side to the other end side in the longitudinal direction of the electromagnetic shielding member is formed over the entire length of the electromagnetic shielding member. The electromagnetic shielding member according to claim 2,
A plurality of cuts respectively formed at the same position in the circumferential direction of the electromagnetic shield member are formed intermittently in the longitudinal direction, leaving a maximum diameter part or a minimum diameter part in the bellows part, respectively.
The said cut | interruption is an electromagnetic shielding member currently formed in the position different from the said slit in the circumferential direction of the said electromagnetic shielding member. The electromagnetic shielding member according to claim 2,
The first recesses are formed intermittently in the longitudinal direction on the plurality of crests in the bellows part and have a concave shape on the outer peripheral surface side of the electromagnetic shield member, or the plurality of trough parts in the bellows part, respectively. A second recess is formed which is intermittently formed in the direction and has a concave shape on the inner peripheral surface side of the electromagnetic shield member;
The plurality of first dent portions or the plurality of second dent portions are respectively formed at the same position in the circumferential direction of the electromagnetic shield member, and at a position different from the slit in the circumferential direction of the electromagnetic shield member. A formed electromagnetic shielding member. The electromagnetic shielding member according to any one of claims 1 to 4,
Furthermore, an electromagnetic shielding member provided with the sheet | seat material containing the conductive resin which overlaps with at least one part of the outer peripheral surface of the said bellows part and the said non-bellows part, or at least one part of the inner peripheral surface of the said bellows part and the said non-bellows part. An electromagnetic shield member manufacturing method for manufacturing an electromagnetic shield member having a bellows portion of a bellows structure that is formed into a cylindrical shape by bending a metal plate member and enables bending deformation,
Including a rotatable first rotating body and a rotatable second rotating body,
The outer peripheral surface in the rotational direction of the first rotating body includes a first uneven surface in which the first convex surface and the first concave surface are alternately arranged in the axial direction, and the outer peripheral surface in the rotational direction of the second rotating body is an axis. Including a second uneven surface in which the second convex surface and the second concave surface are alternately arranged in the center direction;
The first rotating body and the second rotating body are in a state in which the second convex surface of the second rotating body faces the first concave surface of the first rotating body, and the second rotating body By disposing the two concave surfaces facing the first convex surface of the first rotating body, the first concave and convex surface of the first rotating body and the second concave and convex surface of the second rotating body are formed into a molding space. Using a pair of rotationally molded members,
A first step of forming the processing target portion of the metal plate member into a shape corresponding to the forming space by passing the metal plate member through the forming space while rotating the first rotating body and the second rotating body. When,
A second step of bending the metal plate member into a cylindrical shape. It is an electromagnetic shielding member manufacturing method according to claim 6,
The electromagnetic shield member manufacturing, wherein the first step is performed a plurality of times on the portion to be processed of the metal plate member, whereby the portion to be processed of the metal plate member is formed into a shape corresponding to the forming space. Method.

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