JP2017069511A - Retrofitting shield member and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retrofitting shield member capable of making harder to break at the time of bending, by enhancing the shield performance, and to provide a manufacturing method therefor.SOLUTION: A retrofitting shield member 1 is retrofitted to an electric wire 2 so as to cover the circumference thereof, where a metal sheet having a metal sheet layer becomes cylindrical with one turn or more in natural state, and irregularities 10 are formed continuously in the longitudinal direction of cylinder. The metal sheet has such a structure that a resin sheet layer is laminated on one or both sides of the metal sheet layer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a retrofit shield member and a manufacturing method thereof.

  2. Description of the Related Art Conventionally, a retrofit shield member that is attached to an electric wire so as to cover the periphery of the electric wire has been proposed. Such a retrofit shield member is configured to exhibit a shielding function by a metal cloth that is a woven fabric of metal yarn (see, for example, Patent Documents 1 to 5).

  Further, some retrofitted shield members are made of a metal foil and are provided around the electric wire, and others are wound spirally around the electric wire (see, for example, Patent Documents 5 to 7).

JP 2014-123623 A JP 2014-56851 A JP 2013-222645 A JP 2013-176279 A JP 2013-149895 A JP 2013-162728 A JP 2013-251426 A

  However, in the post-shielding member described in Patent Documents 1 to 5, since the shielding function is exhibited by the metal cloth, there is a gap between the metal threads constituting the metal cloth, and it cannot be said that the shielding performance is never high. .

  Further, some of the post-shielding members described in Patent Documents 5 to 7 are formed with slit holes, and cannot be said to have high shielding performance. In addition, when the slit hole is not formed, there is no gap like metal thread or slit hole, and the shielding performance is improved, but the metal foil itself has no flexibility and is bent. There is a possibility of tearing without enduring it. More specifically, the metal foil wound around the electric wire cannot be bent following the bending of the electric wire, and is broken or broken even if not broken. When the metal foil wound around the electric wire is broken, after all, the broken portion causes the breakage.

  The present invention has been made in order to solve such a conventional problem, and an object of the present invention is to improve the shielding performance, and to provide a post-shielding member that can be more difficult to be broken at the time of bending. It is to provide a manufacturing method.

  The post-shielding member of the present invention is a post-shielding member that is attached to an electric wire so as to cover the periphery of the electric wire, and includes a metal sheet layer that has a metal sheet layer and is formed with unevenness that is continuous in a predetermined direction. It is characterized by being.

  According to the post-shielding member of the present invention, since it is constituted by a metal sheet having a metal sheet layer, there is no gap as in the case of having a metal cloth or a slit hole, and the shielding performance can be improved. . In addition, since the metal sheet has irregularities that are continuous in a predetermined direction, the irregularities enhance the flexibility, and the metal sheet is difficult to tear during bending. Therefore, it is possible to improve the shielding performance and make it difficult to break when bent.

  In the post-shielding member of the present invention, it is preferable that the metal sheet has a cylindrical shape with one or more rounds in a natural state, and is provided with irregularities that are continuous in the longitudinal direction of the cylinder.

  According to this retrofitted shield member, the metal sheet has a cylindrical shape of one or more turns in a natural state, and is formed with irregularities that are continuous in the longitudinal direction of the cylinder. Therefore, the retrofitted shield member wound at the time of retrofitting is formed into a cylindrical shape. There is no need for fixing means and the like, and the configuration can be simplified.

  In the retrofit shield member of the present invention, it is preferable that the metal sheet has a structure in which a resin sheet layer is laminated on one surface or both surfaces of the metal sheet layer.

  According to this retrofitted shield member, the metal sheet has a structure in which a resin sheet layer is laminated on one side or both sides of a metal sheet layer. Even if a load is applied to a specific part of the metal sheet, a load is not applied only to the metal sheet layer, but a load is also applied to the resin sheet layer. Is dispersed, the metal sheet layer can be made difficult to tear.

  Moreover, in the post-shielding member of the present invention, it is preferable that the unevenness formed on the metal sheet is formed by convex portions that are substantially hexagonal in plan view and concave portions between the convex portions.

  According to this retrofitted shield member, the irregularities formed on the metal sheet are formed by convex portions that are substantially hexagonal in plan view and concave portions between the convex portions. Can be suitably bent, and it is possible to provide a retrofit shield member excellent in flexibility.

  In the retrofit shield member of the present invention, the substantially hexagonal convex portion has a height from the concave portion of 0.90 mm or more and 0.95 mm or less, and the length between the concave portions in plan view is in the predetermined direction. It is preferably 3.9 mm or more and 4.8 mm or less, and preferably 9.2 mm or more and 10.7 mm or less in a direction orthogonal to the predetermined direction.

  According to this retrofitted shield member, the substantially hexagonal convex portion has a height from the concave portion of not less than 0.90 mm and not more than 0.95 mm, and the length between the concave portions in a predetermined direction in a plan view is not less than 3.9 mm. It is 4.8 mm or less, and is 9.2 mm or more and 10.7 mm or less in a direction orthogonal to the predetermined direction. By setting it as such a dimension, when a predetermined direction is made into the electric wire longitudinal direction and the retrofit shield member is wound around an electric wire, appropriate flexibility can be provided.

  Moreover, the manufacturing method of the post-shielding member of this invention is a manufacturing method of the post-shielding member attached to an electric wire retrofit so that the electric wire periphery may be covered, Comprising: The 1st process of preparing the metal sheet which has a metal sheet layer And a second step in which the metal sheet prepared in the first step is sandwiched and conveyed by a pair of metal rollers in which irregularities are formed on at least one metal roller.

  According to the manufacturing method of the retrofit shield member of the present invention, in order to sandwich and convey the metal sheet between a pair of metal rollers in which irregularities are formed on at least one metal roller, compared to the case of forming irregularities by pressing, Manufacturing suitable for mass production of retrofitted shield members that can continuously form irregularities on a long metal sheet by roller conveyance, improve shield performance, and make it more difficult to break when bent A method can be provided.

  Moreover, in the manufacturing method of the post-shielding member of this invention, it is preferable that the said 2nd process WHEREIN: In the process which clamps and conveys the metal sheet prepared at the said 1st process, it is preferable to form the said metal sheet in a cylinder shape.

  According to the manufacturing method of the retrofit shield member, in the process of holding and conveying the metal sheet, the metal sheet is formed in a cylindrical shape, so there is no need for means for fixing the retrofit shield member wound around the retrofit to the cylindrical shape. Thus, it is possible to manufacture a retrofit shield member capable of simplifying the configuration.

  ADVANTAGE OF THE INVENTION According to this invention, the retrofit shield member which can aim at the improvement of a shield performance and can make it harder to tear at the time of a bending, and its manufacturing method can be provided.

It is a perspective view which shows the retrofit shield member which concerns on embodiment of this invention. FIG. 2 is a developed plan view of the retrofit shield member shown in FIG. 1. It is sectional drawing of the retrofit shield member shown in FIG. It is an expansion | deployment top view which shows the modification of a retrofit shield member, (a) shows a 1st modification, (b) shows a 2nd modification, (c) has shown the 3rd modification. It is the schematic which shows the manufacturing method of the retrofit shield member which concerns on this embodiment.

  Hereinafter, the present invention will be described according to preferred embodiments. Note that the present invention is not limited to the embodiments described below, and can be appropriately changed without departing from the spirit of the present invention. Further, in the embodiment described below, there is a part where illustration or description of a part of the configuration is omitted, but details of the omitted technology are within a range in which there is no contradiction with the contents described below. Needless to say, a known or well-known technique is appropriately applied.

  FIG. 1 is a perspective view showing a retrofit shield member according to an embodiment of the present invention. As shown in FIG. 1, the retrofit shield member 1 is attached to the electric wire 2 by retrofitting so as to cover the periphery of one or a plurality of electric wires 2. Such a retrofit shield member 1 is attached to the electric wire 2 that does not have a shield layer, or is attached to a peeled portion of the electric wire 2 that has a shield layer. In addition, the kind and site | part of the electric wire 2 used as attachment object are not restricted above.

  As shown in FIG. 1, the retrofit shield member 1 has a cylindrical shape (for example, a cylindrical shape) of one or more rounds, and has unevenness 10 formed continuously in the longitudinal direction of the cylinder. In addition, although it is preferable that the retrofitted shield member 1 has a cylindrical shape of one or more turns in a natural state, the cylindrical state of one or more turns is maintained by some fixing means (fixing device, tape, or the like). It may come to be.

  2 is a developed plan view of the post-shielding shield member 1 shown in FIG. 1, and FIG. 3 is a cross-sectional view of the post-shielding shield member 1 shown in FIG. As shown in FIGS. 2 and 3, the post-shield member 1 is formed with a substantially hexagonal convex portion 11 in plan view and a concave portion 12 between the convex portions 11 as the concave and convex portions 10. The convex portion 11 is a portion that protrudes from the reference line CL that is intermediate between the convex portion 11 and the concave portion 12 (a portion that protrudes outward in the cylinder state in the cylindrical state), and the concave portion 12 is recessed from the reference line CL. It is a part (part recessed in the cylinder in the cylinder state).

  In the deployed state, the post-shield member 1 has a convex portion 11 and a concave portion 12 repeatedly formed in a predetermined direction (in the post-shield member 1 shown in FIG. 2, a direction orthogonal to the predetermined direction as well as the predetermined direction). Etc. are also repeatedly formed). The retrofit shield member 1 is attached to the electric wire 2 so that the predetermined direction is the longitudinal direction of the cylinder.

  Moreover, as for the substantially hexagonal convex part 11, the direction which connects two opposing vertices is a direction orthogonal to a predetermined direction. Further, the convex portion 11 has a length w connecting the two vertices, which is longer than a length l in a predetermined direction, and has a vertically long substantially hexagonal shape.

  As shown in FIG. 3, such a post-shield member 1 is a metal sheet S having a metal sheet layer MS made of a metal foil. Thereby, the retrofit shield member 1 exhibits a shielding function. Further, the metal sheet S includes a resin sheet layer RS on both surfaces (or only one surface) of the metal sheet layer MS. Here, the metal sheet layer MS is made of, for example, copper, and the resin sheet layer RS is made of, for example, a PET (polyethylene terephthalate) resin.

  Specifically, the substantially hexagonal convex portion 11 described above has a height h from the concave portion 12 of not less than 0.90 mm and not more than 0.95 mm (see FIG. 3). The length l is 3.9 mm or more and 4.8 mm or less (see FIG. 3), and the length w in the direction orthogonal to the predetermined direction is 9.2 mm or more and 10.7 mm or less (see FIG. 2).

  Such a retrofit shield member 1 has a metal sheet layer MS, and the sheet layer MS is not formed with a slit or the like, so that the shielding performance is improved as compared with the conventional case.

  In addition, when the retrofitted shield member 1 is bent, for example, the distance between the symbols α shown in FIG. 3 increases or decreases. In addition, the distance between the hypotenuses 11a increases or decreases. Therefore, the flexibility is also excellent.

  In addition, the unevenness | corrugation 10 formed in the retrofit shield member 1 is not restricted to the substantially hexagonal convex part 11 and the concave part 12 between the convex parts 11, For example, the following may be sufficient. FIG. 4 is a developed plan view showing a modified example of the retrofitted shield member 1, wherein (a) shows a first modified example, (b) shows a second modified example, and (c) shows a third modified example. Show.

  As shown in FIG. 4A, the unevenness 10 of the retrofit shield member 1 is not limited to that shown in FIGS. 1 to 3, and includes a protrusion 11 and a recess 12 extending in a direction orthogonal to a predetermined direction. May be. Moreover, as shown in FIG.4 (b), the unevenness | corrugation 10 may be comprised by the convex part 11 and the recessed part 12 which inclined only the predetermined angle with respect to the said orthogonal direction. In addition, as shown in FIG. 4C, the unevenness 10 may be configured such that the convex portions 11 and the concave portions 12 are arranged in a lattice pattern on the development plane.

  FIG. 5 is a schematic view illustrating a method for manufacturing the retrofit shield member 1 according to the present embodiment. In manufacturing the post-shielding member 1 according to the present embodiment, first, a metal sheet S having a metal sheet layer MS is prepared (first step). Here, the prepared metal sheet S is one in which the unevenness 10 as shown in FIGS. 1 to 4 is not formed.

  Next, the metal sheet S as shown in FIG. 5 is nipped and conveyed by the pair of metal rollers MR1 and MR2 (second step). Here, both the pair of metal rollers MR1 and MR2 are provided with unevenness having a shape corresponding to the unevenness 10 formed on the metal sheet S. Thereby, the retrofit shield member 1 in which the unevenness 10 continuous in the predetermined direction is formed is manufactured.

  It should be noted that a highly flexible member is provided in which unevenness is formed only on one of the pair of metal rollers MR1 and MR2 (for example, the first roller MR1), and the surface of the other (for example, the second roller MR2) is uneven. You may do it.

  In the second step, it is preferable to form the metal sheet S in a natural state in a process of being sandwiched and conveyed by the pair of metal rollers MR1 and MR2. Thereby, the cylindrical retrofit shield member 1 can be manufactured.

  When the metal sheet S is formed into a cylindrical shape in the process of nipping and conveying, it is preferable that the unevenness of the pair of metal rollers MR1 and MR2 is not made uniform, but one is deepened and the other is shallow to provide a bias. Specifically, the difference between the unevenness depth of the first roller MR1 and the unevenness depth of the second roller MR2 may be more than 0 mm and 0.5 mm or less.

  Further, the present invention is not limited to the above, and the temperature difference between the pair of metal rollers MR1 and MR2 may be set to a predetermined temperature or more, and may be formed into a cylindrical shape by utilizing contraction of the resin sheet layer RS.

  Thus, according to the retrofitted shield member 1 according to the present embodiment, since it is constituted by the metal sheet S having the metal sheet layer MS, there is no gap like a metal cloth or a slit hole. The shield performance can be improved. Moreover, since the metal sheet S has the unevenness 10 that is continuous in a predetermined direction, the unevenness 10 enhances the flexibility, and the metal sheet S is difficult to be torn during bending. Therefore, it is possible to improve the shielding performance and make it difficult to break when bent.

  Further, the metal sheet S has a cylindrical shape of one or more rounds in a natural state, and is provided with unevenness 10 that is continuous in the longitudinal direction of the cylinder, and thus means for fixing the retrofitted shield member 1 wound at the time of retrofitting into a cylindrical shape. Etc. are not required, and the configuration can be simplified.

  Moreover, since the metal sheet S has a structure in which a resin sheet layer RS is laminated on one or both sides of a metal sheet layer MS, the metal sheet is formed by one or both sides of the resin sheet layer RS. The layer MS is protected, and even if a load is applied to a specific portion of the metal sheet S, the load is not applied only to the metal sheet layer MS, and the load is also applied to the resin sheet layer RS. Since the load is dispersed, the metal sheet layer MS can be hardly broken.

  Moreover, since the unevenness | corrugation 10 formed in the metal sheet S is formed in the planar view by the convex part 11 which becomes a substantially hexagonal shape, and the recessed part 12 between the convex parts 11, each part of the metal sheet S with respect to electric wire bending Can be suitably bent, and it is possible to provide the retrofit shield member 1 having excellent flexibility.

  Further, the substantially hexagonal convex portion 11 has a height from the concave portion 12 of 0.90 mm to 0.95 mm, and the length between the concave portions 12 in a predetermined direction in a plan view is 3.9 mm to 4.8 mm. It is 9.2 mm or more and 10.7 mm or less in the direction orthogonal to the predetermined direction. By setting it as such a dimension, when a predetermined direction is made into an electric wire longitudinal direction and the retrofit shield member 1 is wound around an electric wire, appropriate flexibility can be provided.

  Moreover, according to the manufacturing method of the retrofit shield member 1 according to the present embodiment, the metal sheet S is sandwiched and conveyed between the pair of metal rollers MR1 and MR2 in which the unevenness is formed on at least one of the rollers MR1 and MR2. Compared with the case where the unevenness is formed by means of, the unevenness 10 can be continuously formed on the long metal sheet S by roller conveyance, so that the shielding performance is improved and it is more difficult to be broken at the time of bending. The manufacturing method suitable for mass production of the retrofit shield member 1 which can be provided can be provided.

  Further, in the process of sandwiching and conveying the metal sheet S, the metal sheet S is formed in a cylindrical shape, so that there is no need for a means for fixing the post shield member 1 wound around at the time of retrofitting to a cylindrical shape, and the structure can be simplified. A retrofit shield member 1 that can be manufactured can be manufactured.

  As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment, and may be modified without departing from the gist of the present invention.

  For example, in the present embodiment, the metal sheet S includes the resin sheet layer RS on one or both surfaces of the metal sheet layer MS, but is not limited thereto, and is configured by only the metal sheet layer MS. May be.

  Moreover, the adhesion layer may be formed in the cylinder inner side in the retrofit shield member 1 according to the present embodiment. Thereby, when retrofitting with respect to the electric wire 2, what is necessary is just to affix with respect to the electric wire 2, and also because it can affix on the metal sheet S as 1 round winding or more.

1: Retrofit shield member 2: Electric wire 10: Concavity and convexity 11: Convex part 11a: Slope side 12: Concave part CL: Reference line MR1, MR2: Metal roller MS: Sheet layer RS: Sheet layer S: Metal sheet

Claims (7)

A retrofit shield member attached to the electric wire so as to cover the periphery of the electric wire,
A post-shielding member characterized by comprising a metal sheet layer and having a metal sheet on which irregularities that are continuous in a predetermined direction are formed. The post-shielding member according to claim 1, wherein the metal sheet has a cylindrical shape with one or more turns in a natural state, and has unevenness that is continuous in a longitudinal direction of the cylinder. The metal sheet has a structure in which a resin sheet layer is laminated on one surface or both surfaces of the metal sheet layer. 3. Retrofit shield member. The unevenness formed on the metal sheet is formed by a convex portion having a substantially hexagonal shape in plan view, and a concave portion between the convex portions. The retrofit shield member as described in the item. The substantially hexagonal convex portion has a height from the concave portion of not less than 0.90 mm and not more than 0.95 mm, and the length between the concave portions in the predetermined direction in a plan view is not less than 3.9 mm and not more than 4.8 mm. The retrofit shield member according to claim 4, wherein the distance is 9.2 mm or more and 10.7 mm or less in a direction orthogonal to the predetermined direction. A method for manufacturing a retrofit shield member attached to an electric wire so as to cover the electric wire,
A first step of preparing a metal sheet having a metal sheet layer;
A second step in which the metal sheet prepared in the first step is sandwiched and conveyed by a pair of metal rollers having irregularities formed on at least one roller;
The manufacturing method of the retrofit shield member characterized by having. The method of manufacturing a retrofit shield member according to claim 6, wherein, in the second step, the metal sheet is formed into a cylindrical shape in a process of holding and conveying the metal sheet prepared in the first step. .