WO2012144111A1

WO2012144111A1 - Protective material for wire harness and method for manufacturing protective material for wire harness

Info

Publication number: WO2012144111A1
Application number: PCT/JP2011/080001
Authority: WO
Inventors: 田中　厚雄
Original assignee: 住友電装株式会社
Priority date: 2011-04-22
Filing date: 2011-12-26
Publication date: 2012-10-26
Also published as: CN103415967A; JP2012228145A

Abstract

A protective material for wire harness is a member which is wrapped around electric wires to protect the same. This protective material for wire harness includes: a net-like core that is formed by intersecting a plurality of vertical line parts and a plurality of horizontal line parts with each other in the form of a net; and a hole filling part that protrudes to the inner side of each of meshes formed by the plurality of vertical line parts and the plurality of horizontal line parts, and is formed to have a shape of partly or wholly shielding a clearance formed by the vertical line parts and the horizontal line parts, in plan view.

Description

Protective material for wire harness and manufacturing method of protective material for wire harness

Related to technology to protect electric wires.

A resin sheet may be used as an electric wire protection material in a wire harness mounted on a vehicle such as an automobile. In addition, for the purpose of weight reduction, a protective material formed in a net shape may be used. For example, the net-like protective material for a wire harness disclosed in Patent Document 1 is formed in a net shape by overlapping vertical lines and horizontal lines made of a resin wire at intersections without being knitted, and fusing the intersections. . In Patent Document 1, the molten resin material is extruded from the hole of the out die and the hole of the inner die that are rotated in the opposite directions, and each hole is overlapped to form an intersecting portion where the vertical line and the horizontal line are overlapped and welded. A lattice shape is formed by separating the holes.

JP 2010-148335 A

By the way, the wire harness may be exposed to sand, dust, etc. depending on the laying position. For this reason, in a net-like protective material, in order to suppress intrusion of sand, dust, and the like from the mesh (holes), it may be required to reduce the mesh.

However, in the manufacturing method of the net-like protective material in Patent Document 1, if it is attempted to reduce the mesh, there is a possibility of adhesion between adjacent vertical lines or horizontal lines, expansion of the interval between adjacent vertical lines or horizontal lines, and the like. And is difficult to manufacture.

Therefore, an object of the present invention is to suppress intrusion of sand, dust and the like while reducing the weight.

A 1st aspect is a protective material for wire harnesses which protects an electric wire, Comprising: A net-like core part formed by crossing a plurality of line parts in a mesh shape, and the plurality of line parts in a plan view And a hole filling portion that is formed in a shape that protrudes inside the mesh to be partially or wholly shielded therebetween.

A 2nd aspect is a protective material for wire harnesses which concerns on a 1st aspect, Comprising: In the said at least 1 mesh among the meshes formed by the said some line part, the said hole-filling part is the said in planar view, It is formed in a shape that is partially shielded by a shape that opens at the center between meshes formed by a plurality of line portions.

A 3rd aspect is a protective material for wire harnesses which concerns on a 1st aspect, Comprising: In the planar view, the said hole-filling part is the shape which shields entirely between the meshes formed by these several line parts. Is formed.

A 4th aspect is a manufacturing method of the protective material for wire harnesses which protects an electric wire, Comprising: (a) The net-like sheet body in which the some wire which is a resin wire crosses and is formed in mesh shape is heated. A step of melting at least one surface portion, and a step of (b) pressing the net-like sheet body heated in the step (a) in the thickness direction.

According to the protective material for a wire harness according to the first aspect, a plurality of line portions are formed so as to cross in a mesh shape, and project between the mesh formed by the plurality of line portions. And a hole filling portion formed in a shape to be partially or totally shielded. For this reason, it is possible to reduce the weight as compared with a sheet-like protective material having the same thickness dimension, and a gap is reduced by interposing a hole filling portion between the meshes formed by a plurality of line portions of the mesh core, sand, Intrusion of dust and the like can be suppressed.

According to the wire harness protective material according to the second aspect, the hole filling portion is formed in a shape that is partially shielded by a shape that opens at the center between the meshes formed by the plurality of line portions in plan view. Therefore, intrusion of sand, dust and the like can be suppressed while reducing the weight as compared with a normal sheet-like protective material having the same thickness.

According to the protective material for a wire harness according to the third aspect, the hole filling portion is formed in a shape that totally shields the mesh formed by the plurality of line portions in plan view. Etc. can be more effectively suppressed.

According to the method for manufacturing a wire harness protective material according to the fourth aspect, at least one surface portion is heated by heating a net-like sheet body formed by intersecting a plurality of wire rods that are resin wire rods in a mesh shape. And the heated net-like sheet body is pressed in the thickness direction. As a result, the melted portion of the net-like sheet body is spread and penetrates between the meshes formed by the plurality of wire rods, and a portion between the meshes formed by the plurality of wire rods is obtained by solidifying the melt. Therefore, it is possible to suppress intrusion of sand, dust and the like while reducing the weight.

It is a top view of a net-like sheet body. FIG. 2 is a sectional view taken along line II-II in FIG. It is a top view of the protective material for wire harnesses which concerns on 1st Embodiment. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is a top view of the protective material for wire harnesses concerning 2nd Embodiment. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is a top view of the protective material for wire harnesses which concerns on a modification. FIG. 8 is a sectional view taken along line VIII-VIII in FIG. It is a figure which shows the manufacturing method of the protective material for wire harnesses.

Hereinafter, the protective material for wire harnesses according to the embodiment and the manufacturing method thereof will be described. This protective material for wire harnesses is a sheet-like member which protects an electric wire with the cylindrical form which covered the circumference | surroundings of the electric wire. For convenience of explanation, the wire to be protected will be described. The electric wire is, for example, an electric wire incorporated in a wire harness mounted on a vehicle such as an automobile, and may be either an electric wire bundle in which a plurality of electric wires are bundled or a single electric wire. Depending on the routing route, the electric wire may come into contact with peripheral members, and wear may occur due to vehicle vibration or the like. The protective material for a wire harness is a member for protecting such a portion of the electric wire.

<First Embodiment>
First, the protective material 10 for wire harnesses which concerns on 1st Embodiment, and its manufacturing method are demonstrated (refer FIG.3, FIG.4, FIG.9). The wire harness protective material 10 is formed by processing the net-like sheet body 2.

The net-like sheet body 2 is a member formed by crossing a plurality of vertical wires 4 and a plurality of horizontal wires 6 which are resin wires in a mesh shape (see FIGS. 1 and 2). Here, the net-like sheet body 2 (wire harness protective material 10) is formed of polypropylene (PP). The material of the net-like sheet body 2 is not limited to polypropylene (PP), and polyethylene (PE), polyvinyl chloride (PVC), or the like can also be employed. The plurality of vertical wires 4 and the plurality of horizontal wires 6 of the net-like sheet body 2 are formed in a substantially circular shape in a cross-sectional view orthogonal to each extending direction.

The net-like sheet body 2 is manufactured as follows, for example. That is, on the outer peripheral side of the vertical line mold in which a plurality of substantially circular extrusion holes are formed in a spiral shape on the outer peripheral portion of the cylindrical body, a plurality of cross-sectional views are spirally formed on the inner peripheral portion of the cylindrical body. A horizontal wire mold in which a circular extrusion hole is formed is fitted so as to be relatively rotatable, and the molten resin is extruded through each extrusion hole while the vertical wire mold and the horizontal wire mold are rotated in opposite directions. . As a result, the plurality of vertical wires 4 on the inner peripheral side and the plurality of horizontal wires 6 on the outer peripheral side intersect at the positions where they are extruded from the respective extrusion holes, and are bonded at the overlapped intersections. It is formed. The cylindrical body is cooled in water or the like in order to maintain the shape, and is formed as a net-like sheet body 2 by cutting a part in the circumferential direction with a cutting blade. The net-like sheet body 2 is formed in a continuous band shape, and is used by being cut according to the size of the protective material 10 for wire harness.

This wire harness protective material 10 heats the net-like sheet body 2 to melt at least one surface portion in the thickness direction, and pressurizes the heated net-like sheet body 2 in the thickness direction. It is formed through a process.

Here, the net-like sheet body 2 is heated from one side in the thickness direction to melt the surface portion on the one side. In FIG. 4, the protective material 10 for wire harnesses of the example formed by heating from the several horizontal wire 6 side (lower side of FIG. 2) and melt | dissolving these horizontal wire 6 partially is shown. But you may perform the heating of the net-like sheet body 2 from the some vertical wire 4 side.

More specifically, the net-like sheet body 2 is placed and heated on the heater plate 50 in a posture in which the plurality of horizontal wire members 6 are positioned below (see FIG. 9). The heater plate 50 is a device having a planar heating surface on which the net-like sheet body 2 can be placed. Here, the heating surface of the heater plate 50 is heated to 350 degrees. In addition, the temperature of a heating surface is good to set to the temperature higher than melting | fusing point of the net-like sheet body 2 (here, polypropylene).

Then, the net-like sheet body 2 heated on the heater plate 50 is pressurized so as to press against the heating surface of the heater plate 50. Here, the structure which rolls the pressure roller 60 on the net-like sheet body 2, and pressurizes the whole is employ | adopted. More specifically, the pressure roller 60 is moved at a substantially constant interval with respect to the heating surface of the heater plate 50. The space between the pressure roller 60 and the heating surface of the heater plate 50 is determined by the thickness of the net-like sheet body 2, the thickness of the wire harness protective material 10 to be manufactured, and the form (thickness, opening of the hole filling portion 22). It may be determined in consideration of the presence or absence).

Here, although the example which performs the heating and pressurization of the net-like sheet body 2 simultaneously about the manufacturing process of the protective material 10 for wire harnesses was demonstrated, even if it heats the net-like sheet body 2 beforehand and pressurizes immediately after that Good.

The wire harness protective material 10 formed as described above includes a net-like core portion and a hole filling portion 22. More specifically, a net-like core portion is formed by a portion of the plurality of vertical wires 4 and the plurality of horizontal wires 6 that remain without being melted in the net-like sheet body 2, and the plurality of vertical wires 4 and The hole filling portion 22 is formed by solidifying a melt produced by melting the horizontal wire 6.

The mesh core portion is formed by a plurality of vertical line portions 14 and a plurality of horizontal line portions 16 intersecting in a mesh pattern. That is, the plurality of vertical line portions 14 are portions of the plurality of vertical wire members 4 of the net-like sheet body 2 that remain without being melted, and the plurality of horizontal line portions 16 remain without being melted of the plurality of horizontal wire members 6. Part. Here, in the net-like core portion, the surface portion on one side in the thickness direction of the net-like sheet body 2 among the plurality of horizontal wires 6 is melted on the heating surface of the heater plate 50, and the net-like sheet body 2 is entirely formed. By being heated and pressurized, a part or the whole of the undissolved part of the plurality of vertical wires 4 and the plurality of horizontal wires 6 is formed into a flat shape mainly crushed in the thickness direction. .

That is, the plurality of horizontal line parts 16 have a substantially D shape having a straight part on one side in the thickness direction of the mesh core part in a cross-sectional view orthogonal to the extending direction. That is, the plurality of horizontal line portions 16 have flat end surfaces along the extending plane of the mesh core portion on one side in the thickness direction of the mesh core portion. Moreover, the some horizontal wire | line part 16 may have also melt | dissolved the outer peripheral part which the melt body contacted among the some horizontal wire | line materials 6 of the net-like sheet body 2 partially.

Further, the plurality of vertical line portions 14 have a circular shape crushed in the thickness direction in a cross-sectional view orthogonal to the extending direction. However, in the plurality of vertical line portions 14, as in the case of the plurality of horizontal line portions 16, the outer peripheral portions of the plurality of vertical wire members 4 that are in contact with the melt may be partially melted.

The hole filling portion 22 is formed in a shape that protrudes inside the mesh formed by the plurality of vertical line portions 14 and the plurality of horizontal line portions 16 in a plan view and partially or entirely shields the space therebetween. Here, in the net-like sheet body 2 that is placed on the heater plate 50 and heated, the melt produced by melting the plurality of horizontal wires 6 is the plurality of vertical wires 4 and the plurality of horizontal wires 6. It accumulates on the heater plate 50 between unmelted portions and solidifies in this shape. That is, the hole filling portion 22 has an end surface along the extending plane of the mesh core portion on one side in the thickness direction of the mesh core portion. This end face is substantially flush with the end faces of the plurality of horizontal line portions 16.

More specifically, the hole filling portion 22 is formed on both sides mainly along the plurality of horizontal line portions 16 (see FIG. 4). Here, the hole filling portion 22 is in contact with the portion of the plurality of vertical line portions 14 on one side in the thickness direction of the mesh core, and extends along both the vertical line portions 14 and on both sides thereof. It is formed between a plurality of horizontal line portions 16. That is, the hole filling portion 22 is formed in a shape that is partially shielded by a shape that opens at the center between the meshes formed by the plurality of vertical line portions 14 and the plurality of horizontal line portions 16 in plan view ( (See FIG. 3).

For example, the opening size of the hole filling portion 22 is preferably set to be smaller than 100 μm from the viewpoint of suppressing intrusion of sand, dust and the like. In addition, the opening dimension of the hole-filling part 22 can be adjusted by adjusting the heating temperature, heating time, pressurizing force, etc. of the net-like sheet body 2.

This protective material 10 for wire harness is used by cutting into a size corresponding to the diameter and protection range of the wire to be protected. For example, the protective material 10 for a wire harness is preferably formed in a rectangular shape having a width corresponding to the protection range of the electric wire, and is wound around the electric wire in a form in which ends are overlapped in the radial direction of the electric wire. Moreover, the protective material 10 for wire harnesses may be formed in an elongate belt shape, and may be wound helically around the electric wire. In addition, the protective material 10 for wire harness wound around the electric wire may be fixed with an adhesive tape or the like and maintained in a wound state.

However, the protective material 10 for wire harness is not limited to the above shape. For example, the shape formed by heating from both sides in the thickness direction of the net-like sheet body 2 may be used. That is, on both sides in the thickness direction of the net-like sheet body 2, the surface portions of the plurality of vertical wires 4 and the plurality of horizontal wires 6 may be melted to generate a melt and form a hole filling portion.

Further, the production of the wire harness protective material 10 is not limited to the above method. For example, the protective material 10 for wire harness can also be manufactured by press-molding the net-like sheet body 2 with a pair of molds in which one or both are heated. Moreover, it is also possible to employ a mechanism in which one or both of them are sandwiched between a pair of heated rollers.

According to the wire harness protective material 10 and the manufacturing method thereof according to the first embodiment, a plurality of vertical line portions 14 and a plurality of horizontal line portions 16 are formed so as to intersect in a mesh shape, and a plurality of There is provided a hole filling portion 22 formed in a shape that protrudes inside the vertical line portion 14 and the plurality of horizontal line portions 16 and partially or entirely shields the space therebetween. For this reason, while being able to achieve weight reduction compared with the sheet-like protective material of the same thickness dimension, the hole filling part 22 intervenes between the some vertical line part 14 and the some horizontal line part 16 of a net-like core part, and a plurality of The gaps between the vertical line portions 14 and the plurality of horizontal line portions 16 are reduced, and entry of sand, dust, and the like can be suppressed.

Further, the net-like sheet body 2 is heated to melt at least one surface portion in the thickness direction, and the heated net-like sheet body 2 is pressed in the thickness direction, thereby forming the net-like sheet body 2. Among the plurality of vertical wires 4 and the horizontal wires 6 that have been melted and pushed open, the melted portion penetrates between the plurality of horizontal wires 6. The space between the horizontal wires 6 is partially or entirely blocked. Thus, by heating and pressurizing the existing net-like sheet body 2, it is possible to manufacture the protective material 10 for a wire harness that is lighter and has a smaller mesh or is thinner. That is, a mechanism requiring precise management such as extrusion of a thin meridian wire and narrowing of the interval between wires is omitted, and a wire harness protective material 10 that is simpler, lighter, smaller in mesh, or thinner is manufactured. can do.

Moreover, by adjusting the heating temperature, the heating time, and the applied pressure, the wire harness protective material 10 having a plurality of types of thickness dimensions and mesh sizes different from one type of net-like sheet body 2 can be manufactured. .

In addition, the hole filling portion 22 is formed by the wire harness protective material 10 formed in a shape that opens and is partially shielded between the plurality of vertical line portions 14 and the plurality of horizontal line portions 16 in plan view. In addition, it is possible to suppress the intrusion of sand, dust and the like while reducing the weight as compared with a normal sheet-like protective material having the same thickness.

Second Embodiment
Next, the protective material 110 for wire harnesses which concerns on 2nd Embodiment is demonstrated (refer FIG. 5, FIG. 6). In this protective material 110 for wire harnesses, a different point from the protective material 10 for wire harnesses which concerns on 1st Embodiment is mainly the shape of the hole-filling part 122, and it demonstrates centering on this shape. Note that a description of the same configuration is omitted.

The protective material 110 for wire harnesses is formed by the same manufacturing method as the protective material 10 for wire harnesses. But about the heating temperature of the net-like sheet body 2, a heating time, and a pressurizing force, it is good to adjust according to the form etc. of the hole-filling part 122 of the protective material 110 for wire harnesses to form.

The wire harness protective material 110 includes a net-like core portion having a plurality of vertical line portions 114 and a plurality of horizontal line portions 116, and a hole filling portion 122.

The hole filling portion 122 is formed in a shape that totally shields the mesh formed by the plurality of vertical line portions 114 and the plurality of horizontal line portions 116 in plan view (see FIG. 5). More specifically, when the net-like sheet body 2 is heated and the surface portion on one side in the thickness direction of the net-like sheet body 2 among the plurality of horizontal wires 6 is melted, On the heating surface, a hole filling portion 122 is formed by accumulating and solidifying between the plurality of horizontal wires 6 that have not been melted (see FIG. 6). In addition, the hole filling portion 122 is interposed between the plurality of horizontal line portions 116 and is formed in contact with a portion on one side in the thickness direction of the mesh core portion among the plurality of vertical line portions 114.

The center portion of the hole filling portion 122 is thinly formed between the plurality of vertical line portions 114 and the plurality of horizontal line portions 116 in plan view (see FIG. 6). And by this shape where this center part is formed thinly, it becomes lightweight compared with the sheet-like protective material of the same thickness.

The shapes of the plurality of vertical line portions 114 and the plurality of horizontal line portions 116 are the same as the wire harness protective material 10 except that the thickness dimensions of the plurality of horizontal line portions 116 (melting amount of the plurality of horizontal wire members 6) are different. It is almost the same.

However, in a mesh formed by a plurality of vertical line portions and a plurality of horizontal line portions, a part of the mesh may be shielded entirely, and the other mesh may be partially shielded in a shape opening at the center. .

7 and 8 show a wire harness protective material 210 formed by heating from both sides of the net-like sheet body 2 in the thickness direction. The wire harness protection member 210 includes a mesh core having a plurality of vertical line portions 214 and a plurality of horizontal line portions 216, and a hole filling portion 222.

In the plurality of vertical line portions 214, in the cross-sectional view orthogonal to the extending direction of the plurality of vertical line portions 214, the surface portion on the other side in the thickness direction of the net-like sheet body 2 among the plurality of vertical wire members 4 is melted. , And is formed in a substantially D shape having a straight line portion on the other side in the thickness direction. That is, the plurality of vertical line portions 214 have end faces along the extending plane of the mesh core portion on the other side in the thickness direction of the mesh core portion.

Further, the hole filling portion 222 is formed in a shape that totally shields between the plurality of vertical line portions 114 and the plurality of horizontal line portions 116 in plan view. The hole filling portion 222 is formed to have a large thickness dimension as compared with the case where the net-like sheet body 2 is heated only from one side in the thickness direction. That is, since the surface portions on both sides in the thickness direction of the net-like sheet body 2 are melted, the amount of the melt is large, and a larger amount is accumulated between the plurality of vertical wire rods 4 and the plurality of horizontal wire rods 6 that remain undissolved. Note that the wire harness protective material 210 as a whole is formed thinner. Here, in plan view, the central portion of the hole filling portion 222 is formed thin (see FIG. 8). And by the shape where this center part is formed thinly, it becomes lightweight compared with the sheet-like protective material of the same thickness.

According to the wire harness protective material 110 according to the second embodiment, the hole filling portion 122 is formed in a shape that totally shields between the plurality of vertical line portions 114 and the plurality of horizontal line portions 116 in plan view. Therefore, intrusion of sand, dust and the like can be more effectively suppressed. In addition, the same effect is obtained also about the protective material 210 for wire harnesses which concerns on the said modification.

Further, the thickness of the wire harness protective material as a whole can be easily adjusted by changing the melting amount of the net-like sheet body 2 according to the heating and pressurizing modes.

As described above, the wire harness

protective material

10, 110, 210 has been described in detail, but the above description is an example in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

2 Net-like sheet body 4 Multiple vertical wire materials 6 Multiple

horizontal wire materials

10, 110, 210 Protective material for

wire harness

14, 114, 214 Multiple

vertical wire portions

16, 116, 216 Multiple

horizontal wire portions

22, 122, 222 Filling holes 50 Heater plate 60 Pressure roller

Claims

A protective material for a wire harness that protects an electric wire,
A reticulated core portion formed by crossing a plurality of line portions in a reticulated manner;
In a plan view, a hole filling portion formed in a shape that protrudes inside the mesh formed by the plurality of line portions and partially or entirely shields the space between them,
A protective material for wire harness.
It is a protective material for wire harnesses of Claim 1, Comprising:
In at least one of the meshes formed by the plurality of line parts, in the plan view, the hole filling part is partially open in the center between the meshes formed by the plurality of line parts. A protective material for a wire harness formed in a shielding shape.
It is a protective material for wire harnesses of Claim 1, Comprising:
The said hole-filling part is a protective material for wire harnesses currently formed in the shape which shields between the mesh | network formed by these several line parts in planar view.
A method of manufacturing a protective material for a wire harness that protects an electric wire,
(A) a step of heating a net-like sheet body formed by crossing a plurality of wires that are resin wires into a mesh shape, and melting a surface portion on at least one side;
(B) a step of pressing the net-like sheet body heated in the step (a) in a thickness direction;
The manufacturing method of the protective material for wire harnesses provided with.