Water-stopping structure, wire harness, and manufacturing method of wire harness

Abstract

The present application provides a kind of water stop structure, pencil and pencil manufacturing method, in the water stop area between the pencil with the water stop component of braided fabric covering outer periphery, can ensure good water stop performance.In the pencil (13) of the pencil (11) of a plurality of electric wires (11) is set for water stop between grommet (21) water stop part (15), water stop part (15) has: at least one pair of spacers (31), it is installed to the outer periphery of pencil (13) in the position including water stop area (S) that needs water stop between grommet (21), and a pair of spacers (31) are arranged at intervals in the length direction of pencil (13);Cylindrical braided fabric (33) is covered in the outer periphery of pencil (13) including spacer (31);And resin (35), it covers the outer periphery of pencil (13) water stop area (S) together with spacer (31) and braided fabric (33).

Description

Technical Field

[0001] This invention relates to a water-stopping structure, a wire harness, and a method for manufacturing the wire harness. Background Technology

[0002] Patent Document 1 discloses a technique for sealing the gap between a water-stopping portion of a wire harness and a tube portion of a loop embedded in the water-stopping portion. Patent Document 1 discloses that a water-stopping portion made of thermoplastic resin is formed covering the wire harness in the region of the tube portion of the loop to which the wire harness is embedded; the tube portion of the loop is embedded in the water-stopping portion; and then, at least its outer periphery of the water-stopping portion is softened by heating.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2012-85387 Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] However, in power supply harnesses containing large-diameter wires such as high-voltage lines, the outer perimeter of the harness is covered with braided material for shielding and noise suppression. In such harnesses, even if a waterproofing layer is formed by molding resin around the braided portion to create a seal, the resin may not fully penetrate between the wire and the braid, potentially compromising waterproofing performance.

[0008] The present invention was made in view of the above circumstances, and its object is to provide a water-stopping structure, a wire harness, and a method for manufacturing the wire harness, which can ensure good water-stopping performance in the water-stopping area between the wire harness having a braided fabric covering the outer periphery and the water-stopping component.

[0009] means for solving problems

[0010] The above-mentioned objective of the present invention is achieved by the following structure.

[0011] A water-stopping structure,

[0012] The wire bundle, which consists of multiple wires, is equipped with a water-stopping part for sealing the water between itself and the water-stopping component.

[0013] The water-stopping part has:

[0014] At least one pair of spacers are installed on the outer periphery of the wire harness at a location that includes a water-stopping section between the water-stopping component and the water-stopping member, and at least one pair of spacers are spaced apart in the length direction of the wire harness.

[0015] A tubular braided fabric covering the outer periphery of the wire bundle containing the spacers; and

[0016] The resin covers the outer periphery of the waterproofing zone of the wire harness together with the spacer and the braid.

[0017] A method for manufacturing a wire harness, wherein the wire harness, which is composed of multiple wires, is provided with a water-stopping part for sealing against water between itself and a water-stopping component.

[0018] The method for manufacturing the wire harness includes:

[0019] In the spacer setting process, at least one pair of spacers are installed on the outer periphery of the wire harness at the location of the water-stopping section that needs to be water-stopped between the wire harness and the water-stopping component. The at least one pair of spacers are arranged at intervals along the length direction of the wire harness.

[0020] The braided fabric installation process involves covering the outer periphery of the wire bundle containing the spacers with a tubular braided fabric; and

[0021] The forming process involves filling the waterproofing area with resin to cover the waterproofing zone in the wire harness, thereby forming a waterproofing section.

[0022] Invention Effects

[0023] According to the present invention, a water-stopping structure, a wire harness, and a method for manufacturing the wire harness are provided that can ensure good water-stopping performance in the water-stopping area having a braided fabric covering the outer periphery and a water-stopping component.

[0024] The present invention has been briefly described above. Furthermore, the details of the invention will become even clearer by referring to the accompanying drawings and reading the following description of methods for carrying out the invention (hereinafter referred to as "implementation methods"). Attached Figure Description

[0025] Figure 1 This is a perspective view of the water-stopping part of the wire harness equipped with the water-stopping structure of this embodiment.

[0026] Figure 2 This is a three-dimensional view of the waterproofing section after the resin has been removed.

[0027] Figure 3 It is a three-dimensional view of the waterproofing section after the resin and woven fabric have been removed.

[0028] Figure 4 This is a cross-sectional view along the axial direction of the wire harness in the state where the water-stopping part is embedded in the sealing hole of the cable ring.

[0029] Figure 5This is a cross-sectional view of the wire harness along its axial direction during the manufacturing process of the wire harness.

[0030] Figure 6 This is a cross-sectional view of the wire harness along its axial direction during the manufacturing process of the wire harness.

[0031] Figure 7 This is a cross-sectional view of the wire harness along its axial direction during the manufacturing process of the wire harness.

[0032] Figure 8 This is a cross-sectional view of the wire harness along its axial direction during the manufacturing process of the wire harness.

[0033] Figure 9 This is a radial cross-sectional view of the wire harness during the manufacturing process, illustrating the wire harness manufacturing steps.

[0034] Figure 10 This is a radial cross-sectional view of the wire harness during the manufacturing process, illustrating the wire harness manufacturing steps.

[0035] Figure 11 This is a radial cross-sectional view of the wire harness during the manufacturing process, illustrating the wire harness manufacturing steps.

[0036] Figure 12 This is a radial cross-sectional view of the wire harness during the manufacturing process, illustrating the wire harness manufacturing steps.

[0037] Explanation of reference numerals in the attached figures

[0038] 11. Electrical wires

[0039] 13. Wire harness

[0040] 15 Water stop part

[0041] 21. Cable ring (water-stopping component)

[0042] 31 Spacer

[0043] 33 Woven fabrics

[0044] 35 resin

[0045] 41 Hole

[0046] 51 Mold

[0047] 57-type cavity

[0048] S water-stopping zone

[0049] WH wiring harness Detailed Implementation

[0050] Hereinafter, specific embodiments related to the present invention will be described with reference to the figures.

[0051] Figure 1 This is a perspective view of the water-stopping part 15 of the wire harness WH, which is provided with the water-stopping structure according to this embodiment. Figure 2 This is a perspective view of the waterstop part 15 with resin 35 removed. Figure 3 This is a perspective view of the water-stopping part 15 with the resin 35 and the woven fabric 33 removed. Figure 4 This is a cross-sectional view along the axial direction of the wire harness WH, showing the state of the water-stopping part 15 embedded in the sealing hole 23 of the cable ring 21.

[0052] like Figures 1-3 As shown, the water-stopping structure according to this embodiment is applicable to wire harness WH. Wire harness WH is installed in vehicles such as automobiles for example, as a power supply. Wire harness WH is composed of a wire bundle 13 consisting of multiple wires 11 bundled together, and a water-stopping part 15 is provided on this wire bundle 13. In this example, wire harness WH has a wire bundle 13 consisting of two wires 11 bundled together. The wires 11 constituting the wire bundle 13 are, for example, large-diameter wires such as high-voltage wires. The wires 11 are insulated wires with an outer sheath 19 covering the periphery of a conductor core wire 17. Furthermore, the number of wires 11 in the wire bundle 13 is not limited to two, and may also be three or more.

[0053] like Figure 4 As shown, the water-stopping part 15 has a pair of spacers 31, a braid 33, and resin 35. The water-stopping part 15 of the wire harness WH is cylindrical in shape and is provided for water-stopping between itself and the cable ring (water-stopping component) 21. The cable ring 21 has a sealing hole 23 formed in a cylindrical shape. The wire harness WH passes through the sealing hole 23 of the cable ring 21, and the water-stopping part 15 is embedded in the sealing hole 23. A plurality of lips 25 protruding radially inward are formed circumferentially on the inner circumference of the sealing hole 23. These lips 25 are spaced apart axially and fit tightly against the outer circumferential surface of the water-stopping part 15 embedded in the sealing hole 23. Thus, the wire harness WH and the cable ring 21 are water-stopped in the water-stopping section S along the length direction of the sealing hole 23.

[0054] The spacer 31 is molded from an insulating resin and is formed into a generally circular plate shape. The spacer 31 has a diameter larger than the outermost diameter of the wire bundle 13. The spacer 31 has the same number of holes 41 as the wires 11, through which the wires 11 are inserted. Thus, a pair of spacers 31 are installed at intervals along the length of the wire bundle 13 on the outer periphery of the wire bundle 13. Furthermore, the wires 11 inserted into the holes 41 of the spacer 31 are spaced apart from each other along the length direction.

[0055] The braid 33 is constructed, for example, by braiding soft copper wire with a diameter of approximately 0.12 mm to 0.32 mm, forming a cylindrical shape. The wire bundle 13 passes through the interior of the braid 33. The braid 33 serves as a noise-suppressing shielding component, covering the outer periphery of the wire bundle 13, which includes the spacer 31. The braid 33 mounted on the wire bundle 13 is widened by the spacer 31. As a result, the gap between the braid 33 and the wire 11 increases, and the mesh size expands.

[0056] Resin 35 is disposed on the outer periphery of the waterproofing zone S of the wire harness 13, and the wire harness 13, together with the spacer 31 and the braid 33, is covered by resin 35. Thus, the wire harness 13 is in a state where resin 35 is filled between the wires 11, between the wires 11 and the braid 33, in the mesh of the braid 33, and on the outer periphery of the braid 33 (see reference). Figure 4 As the resin 35, for example, a thermoplastic resin is used.

[0057] Thus, according to the water-stopping structure of this embodiment, by installing spacers 31 on the outer periphery of the wire harness 13, a gap is formed between the wire harness 13 and the braided fabric 33. Furthermore, the braided fabric 33 is enlarged in diameter, thereby increasing the mesh size of the braided fabric 33. Consequently, in the water-stopping section 15, the resin 35 covering the water-stopping zone S is sufficiently positioned between the wire harness 13 and the braided fabric 33, and is thus incorporated into the mesh of the braided fabric 33. Therefore, by covering the outer periphery with the braided fabric 33, a shielding function is achieved, and good water-stopping performance in the water-stopping zone S is ensured.

[0058] Furthermore, the spacer 31 has holes 41 through which the power supply wires 11 are inserted, thus creating gaps between the wires 11 inserted into the holes 41. Therefore, in the water-stopping part 15, the gaps between the wires 11 are filled with resin 35, ensuring better water-stopping performance.

[0059] Furthermore, based on the wire harness WH equipped with this water-stopping structure, good water-stopping performance is ensured at the water-stopping part 15 containing the water-stopping section S. Therefore, when passing through the sealing hole 23 of the cable ring 21, the water-stopping section S can be well sealed between the cable ring 21 and the cable ring 21.

[0060] Alternatively, after the water-stopping part 15 is inserted into the sealing hole 23 of the cable ring 21, the water-stopping area S can be heated to soften the resin 35. This allows the inner circumferential surface of the sealing hole 23 with the lip 25 to fit more tightly against the outer circumferential surface of the water-stopping part 15, thereby improving the water-stopping performance.

[0061] Next, the manufacturing method of the above-mentioned wire harness WH with a water-stopping structure will be explained.

[0062] Figures 5-8This is a cross-sectional view of the wire harness WH along the axial direction during the manufacturing process of the wire harness WH. Figures 9-12 This is a radial cross-sectional view of the wire harness WH during the manufacturing process of the wire harness WH.

[0063] (Spacer installation process)

[0064] like Figure 5 and Figure 9 As shown, first, a wire bundle 13 consisting of bundled wires 11 is prepared, and each wire 11 is passed through the hole 41 of the spacer 31, and the spacer 31 is installed on the outer periphery of the wire bundle 13. Furthermore, these spacers 31 are arranged at intervals along the length direction at positions including the water-stopping section S.

[0065] (Woven fabric installation process)

[0066] like Figure 6 and Figure 10 As shown, a tubular braided fabric 33 is installed on a wire bundle 13 in which spacers 31 are mounted. Specifically, the wire bundle 13 in which spacers 31 are mounted passes through the braided fabric 33, and the braided fabric 33 covers the outer periphery of the wire bundle 13 containing the spacers 31. Thus, when the braided fabric 33 covers the wire bundle 13 in which spacers 31 are mounted, the braided fabric 33 is expanded in diameter by the spacers 31. As a result, the gap between the braided fabric 33 and the wires 11 increases, and the mesh size increases.

[0067] (Forming process)

[0068] like Figure 7 and Figure 11 As shown, a mold 51 is provided at the mounting position of the braid 33 in the wire harness 13. This mold 51 consists of a lower mold 53 and an upper mold 55. These lower molds 53 and upper molds 55 are positioned opposite each other, and have forming recesses 53a and 55a on their opposing sides. The mounting position of the braid 33 in the wire harness 13 is positioned between the lower mold 53 and the upper mold 55 of the mold 51, allowing the lower mold 53 and upper mold 55 to come close together for mold closing. Thus, a cavity 57 is formed by the forming recesses 53a and 55a of the lower mold 53 and the upper mold 55, and the cavity 57 surrounds the portion of the wire harness 13 that becomes the water-stopping area S. Furthermore, the cavity 57 of the mold 51 has an inner diameter larger than the outer diameter of the braid 33 mounted on the wire harness 13. Therefore, when the portion of the wire harness 13 that becomes the water-stopping area S is surrounded by the cavity 57, a gap is formed between the inner periphery of the cavity 57 and the outer periphery of the braid 33.

[0069] Next, as Figure 8 and Figure 12As shown, the cavity 57 of the mold 51 after mold closing is filled with heated and molten thermoplastic resin 35. The molten resin 35 then fills the spaces between the wires 11, between the wires 11 and the braid 33, the mesh of the braid 33, and the outer periphery of the braid 33. After the resin 35 cools and solidifies, the lower mold 53 is separated from the upper mold 55, and the wire harness 13 is demolded from the mold 51. Thus, a shielding mechanism is obtained, and a wire harness WH is obtained in which a water-stopping section S in the wire harness 13 is provided with a water-stopping part 15 molded from resin 35.

[0070] Thus, according to the above-described method for manufacturing wire harnesses, a wire harness WH that provides shielding functionality and ensures good water-stopping performance at the water-stopping portion 15, including the water-stopping zone S, can be easily manufactured. In particular, by using a mold 51 composed of a lower mold 53 and an upper mold 55, the water-stopping portion 15 can be easily molded. As a result, the forming process of the water-stopping portion 15 can be simplified, reducing manufacturing costs.

[0071] Furthermore, in the above embodiment, the number of spacers 31 installed on the wire harness 13 is not limited to a pair. For example, three or more spacers 31 may be installed spaced apart along the length of the wire harness 13. Alternatively, the spacers 31 may be connected to each other along the length, thus saving the effort of adjusting the spacing between the spacers 31. In this case, the connecting portions that connect the spacers 31 to each other should not obstruct the filling of the resin 35.

[0072] Furthermore, the present invention is not limited to the embodiments described above, and can be appropriately modified and improved. Moreover, the material, shape, size, quantity, and arrangement of the constituent elements in the above embodiments are arbitrary and not limited, as long as they enable the realization of the present invention.

[0073] Here, the features of the embodiments of the above-described water-stopping structure, wire harness, and wire harness manufacturing method of the present invention are briefly summarized and listed in [1] to [5] below.

[0074] [1] A water-stopping structure is provided with a water-stopping part (15) for stopping water between itself and a water-stopping component (cable ring 21) in a wire bundle (13) formed by bundling multiple wires (11).

[0075] The water-stopping part (15) has:

[0076] At least one pair of spacers (31) are installed on the outer periphery of the wire harness (13) at a position including the water-stopping section (S) between the water-stopping member (cable ring 21) and the water-stopping section (S) that needs to be water-stopped, and at least one pair of spacers (31) are spaced apart in the longitudinal direction of the wire harness (13).

[0077] A tubular braided fabric (33) covers the outer periphery of the wire bundle (13) containing the spacer (31); and

[0078] Resin (35) covers the outer periphery of the water-stopping section (S) of the wire harness (13) together with the spacer (31) and the braid (33).

[0079] According to the water-stopping structure described above [1], by installing the spacer on the outer periphery of the wire harness, the braid is enlarged, and a gap is formed between the wire harness and the braid, and the mesh size of the braid becomes larger. Thus, in the water-stopping section, the resin covering the water-stopping area is sufficiently present between the wire harness and the braid, and furthermore, it enters the mesh size of the braid. Therefore, by covering the outer periphery with the braid, a shielding function can be obtained, and good water-stopping performance in the water-stopping area can be ensured.

[0080] [2] According to the water-stopping structure described in [1], wherein,

[0081] The spacer (31) has holes (41) through which the wires (11) are inserted respectively, and gaps are formed between the wires (11) inserted into the holes (41).

[0082] According to the above [2] structure, the water-stopping structure has gaps between the wires due to the installation of spacers, thus filling the gaps between the wires with resin, which can ensure better water-stopping performance.

[0083] [3] A wire harness having the water-stopping structure described in [1] or [2].

[0084] The wire harness constructed according to the above [3] ensures good water-stopping performance at the water-stopping part containing the water-stopping zone, so that when passing through the sealing hole of the water-stopping component such as the cable ring, the water-stopping zone can be well sealed with the water-stopping component.

[0085] [4] A method for manufacturing a wire harness (WH), wherein the wire harness (13) formed by bundling multiple wires (11) is provided with a water-stopping part (15) for water-stopping between itself and a water-stopping component (cable ring 21), the method for manufacturing the wire harness being characterized in that it includes:

[0086] In the spacer setting process, at least one pair of spacers (31) are installed on the outer periphery of the wire harness (13) at the location of the water-stopping section (S) that needs to be water-stopped between the water-stopping component (cable ring 21) and the wire harness (13) are arranged at intervals along the length direction of the wire harness (13).

[0087] The braided fabric installation process involves covering the outer periphery of the wire bundle (13) containing the spacer (31) with a tubular braided fabric (33); and

[0088] In the forming process, resin (35) is filled in such a way as to cover the water-stopping area (S) in the wire harness (13) to form a water-stopping part (15).

[0089] According to the manufacturing method of the wire harness constructed as described above [4], it is possible to easily manufacture a wire harness that has a shielding function and ensures good water-stopping performance in the water-stopping section containing the water-stopping zone.

[0090] [5] According to the wire harness manufacturing method described in [4], wherein,

[0091] In the forming process,

[0092] A mold (51) is provided at the mounting position of the braid (33) in the wire harness (13), and the cavity (57) of the mold (51) is arranged at the position that becomes the water-stopping zone (S).

[0093] The waterstop (15) is molded by filling the cavity (57) with resin (35).

[0094] According to the manufacturing method of the wire harness constructed as described above [5], the water-stop part can be easily molded using a mold. As a result, the forming process of the water-stop part can be simplified, and manufacturing costs can be reduced.

Claims

1. A water-stopping structure, characterized in that, The wire bundle, which consists of multiple wires, is equipped with a water-stopping part for sealing the water between itself and the water-stopping component. The water-stopping part has: At least one pair of spacers are installed on the outer periphery of the wire harness at a location that includes a water-stopping section between the water-stopping component and the water-stopping member, and at least one pair of spacers are spaced apart in the length direction of the wire harness. A tubular braided fabric that covers the outer periphery of the wire bundle containing the spacers; as well as The resin covers the outer periphery of the waterproofing zone of the wire harness together with the spacer and the braid.

2. The water-stopping structure according to claim 1, characterized in that, The spacer has holes through which the wires are inserted, and gaps are formed between the wires inserted into the holes.

3. A wire harness, characterized in that, It possesses the water-stopping structure as described in claim 1 or 2.

4. A method for manufacturing a wire harness, wherein the wire harness, which is composed of multiple wires, is provided with a water-stopping part for sealing between itself and a water-stopping component. The method for manufacturing the wire harness is characterized by comprising: In the spacer setting process, at least one pair of spacers are installed on the outer periphery of the wire harness at the location of the water-stopping section that needs to be water-stopped between the wire harness and the water-stopping component, and the at least one pair of spacers are arranged at intervals along the length direction of the wire harness. The braided fabric installation process involves covering the outer periphery of the wire bundle containing the spacers with a tubular braided fabric; and The forming process involves filling the waterproofing area with resin to cover the waterproofing zone in the wire harness, thereby forming a waterproofing section.

5. The method for manufacturing a wire harness according to claim 4, characterized in that, In the forming process, A mold is provided at the installation location of the braid in the wire harness, and the cavity of the mold is configured at the location that forms the water-stopping zone. The water-stopping part is molded by filling the cavity with resin.

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