Seal structure for multicore cable

A seal structure for a multicore cable includes a multicore cable in which a first electrical wire to a fourth electrical wire are enveloped by a sheath, a rubber plug that is fitted around an end portion of the sheath and has through-holes through which the electrical wires respectively pass, and a holder having a sheath holding portion configured to hold the sheath and suppress shifting of a position of the sheath relative to the multicore cable, in which the holder has locking portion portions configured to hold the rubber plug and suppress movement of the rubber plug in a direction in which the rubber plug comes off from the end portion of the sheath.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Japanese patent application JP2015-246030 filed on Dec. 17, 2015, the entire contents of which are incorporated herein.

TECHNICAL FIELD

The technology disclosed in the present specification relates to a seal structure for a multicore cable.

BACKGROUND ART

Conventionally, a rubber plug as disclosed in JP H11-329567A (Patent Document 1) is known as a rubber plug for waterproofing electrical wires collectively. This rubber plug has multiple electrical wire insertion holes for the passage of respective electrical wires. The electrical wires and the rubber plug are sealed by intimate contact between the outer circumferential surfaces of the electrical wires and the inner circumferential surfaces of the electrical wire insertion holes. Also, the rubber plug and its housing are sealed by intimate contact between the outer circumferential surface of the rubber plug and an inner wall surface of a rubber plug mounting opening of the housing.

SUMMARY

In the above-described conventional technique, a cover member is detachably fitted around a rear end portion of the housing via a locking portion. The cover member has electrical wire through-holes for passage of the respective electrical wires.

According to the conventional techniques described above, for example, if a relatively strong force is applied to electrical wires, there is a concern that the rubber plug will be pulled by the electrical wires and its position shifts, so that the relative positions of the electrical wire insertion holes of the rubber plug and the electrical wire through-holes of the cover member are shifted. There is a risk that the intimacy of the contact between the outer circumferential surfaces of the electrical wires and the inner circumferential surfaces of the electrical wire insertion holes will decrease, and the seal between the electrical wires and the rubber plug will decrease.

The technology disclosed in the present specification was achieved in light of the above-described situation, and an object thereof is to improve the sealing property of a multi core cable.

The technology disclosed in the present specification includes a multicore cable in which a plurality of electrical wires are enveloped by a sheath; a rubber plug that is fitted around an end portion of the sheath and has a plurality of through-holes through which the plurality of electrical wires respectively pass; and a holder having a sheath holding portion configured to hold the sheath and suppress shifting of a position of the sheath relative to the multicore cable, in which the holder has a rubber plug holding portion configured to hold the rubber plug and suppress movement of the rubber plug in a direction in which the rubber plug comes off from the end portion of the sheath.

According to the above-described configuration, the rubber plug is prevented from coming off from the end portion of the sheath, and thus the sealing property of the multicore cable can be improved. Also, the sheath is held by the sheath holding portion. As a result, relative positions of the sheath and the rubber plug are held by the holder. Accordingly, the rubber plug is reliably pressed against the sheath and the electrical wires, and thus the sealing property of the multicore cable can be improved.

The following aspects are preferable as embodiments of the technology disclosed in the present specification.

It is preferable that a cap that is fitted around the rubber plug is included, and movement of the rubber plug in a direction in which the rubber plug comes off from the end portion of the sheath is suppressed by engagement of the rubber plug holding portion and the cap.

According to the above-described configuration, an internal pressure can be applied to the rubber plug by the cap that is fitted around the rubber plug, and thus the sealing property of the multicore cable can be further improved.

It is preferable that one of the holder and the cap is provided with a guide portion, and the other of the holder and the cap is provided with a guided portion configured to slide against the guide portion, and the rubber plug holding portion is guided by the guide portion and the guided portion sliding against each other, to a position at which the rubber plug holding portion is locked to the cap.

According to the above-described configuration, it is possible to reliably lock the holder and the cap together, and thus to reliably improve the sealing property of the multicore cable.

The holder preferably has a protection portion that covers the rubber plug holding portion.

According to the above-described configuration, contact of foreign matter with the rubber plug holding portion is suppressed. Accordingly, the release of a structure in which the rubber plug holding portion and the rubber plug are locked together is suppressed, and thus it is possible to further improve the sealing property of the multicore cable.

It is preferable that a binding member is wrapped around the sheath holding portion in a state in which the sheath holding portion is pressed inward in a radial direction.

According to the above-described configuration, the sheath is pressed inward by the binding member in the radial direction of the sheath. As a result, the sheath and the electrical wires are reliably fixed due to intimate contact between the inner circumferential surface of the sheath and the outer surfaces of the electrical wires.

According to the technology disclosed in the present specification, it is possible to improve the sealing property of a multicore cable.

DESCRIPTION OF EMBODIMENTS

Embodiment 1 to which the present design is applied to a seal structure12for a multicore cable11will be described with reference toFIGS. 1 to 13. The present embodiment can be applied to a wire harness for an electrical parking brake that is installed in a vehicle (not shown), for example. As shown inFIG. 4, the seal structure12includes a multicore cable11, a rubber plug15that is fitted around an end portion14A of a sheath14of the multicore cable11, a cap17that is fitted around the rubber plug15, and a holder52configured to hold the multicore cable11and the cap17. In the following description, the direction represented by arrow F is considered to be the frontward direction.

As shown inFIG. 2, the multicore cable11according to the present embodiment has a configuration in which a plurality (four in the present embodiment) of electrical wires13A,13B,13C, and13D are enveloped by a sheath14that is made of an insulating synthetic resin. The electrical wires13A,13B,13C, and13D have a configuration in which the outer circumferential surface of a metal core wire (not shown) is covered by a synthetic resin insulating covering (not shown). The multicore cable11has a circular cross-section.

As shown inFIG. 2, the four electrical wires13A,13B,13C, and13D include two types of electrical wires13A,13B,13C, and13D that have different outer diameters. In the present embodiment, the first electrical wire13A and the second electrical wire13B are for connection to an electrical parking brake motor, and the third electrical wire13C and the fourth electrical wire13D are for an anti-lock brake system sensor. The first electrical wire13A, the second electrical wire13B, the third electrical wire13C, and the fourth electrical wire13D have circular cross-sections. Note that the applications of the first electrical wire13A to the fourth electrical wire13D are not limited to the above-described embodiment.

The outer diameters of the first electrical wire13A and the second electrical wire13B are set to be larger than the outer diameters of the third electrical wire13C and the fourth electrical wire13D. The outer diameter of the first electrical wire13A is set to be the same as the outer diameter of the second electrical wire13B. Also, the outer diameter of the third electrical wire13C is set to be the same as the outer diameter of the fourth electrical wire13D. The first electrical wire13A, the second electrical wire13B, the third electrical wire13C, and the fourth electrical wire13D extend and branch out from an end portion14A of the sheath14of the multicore cable11.

As shown inFIGS. 4 to 6, the seal member10is attached to the end portion14A of the sheath14of the multicore cable11, specifically to the region in which the first electrical wire13A, the second electrical wire13B, the third electrical wire13C, and the fourth electrical wire13D are branched. The intrusion of a liquid such as water or oil through the end portion14A of the sheath14into the sheath14is suppressed by the seal member10. The seal member10includes the rubber plug15that is fitted around the end portion14A of the sheath14, a guide member16that is attached to an inner portion of the rubber plug15, and the cap17that is fitted around the rubber plug15.

As shown inFIGS. 4 and 5, the rubber plug15is fitted around the end portion14A of the sheath14. The rubber plug15has a sheath fitting portion18that is shaped as a hood that is open rearward and is fitted around the end portion14A of the sheath14. In other words, the sheath fitting portion18is shaped as a hood that extends toward the side opposite to the end portion14A of the sheath14(the left side inFIG. 4) and is open in a direction opposite to the end portion14A of the sheath14(leftward inFIG. 4). A flange portion19that protrudes outward in the radial direction of the sheath fitting portion18is formed at an end edge portion of the sheath fitting portion18. The sheath fitting portion18is shaped as a substantially circular tube in its natural state.

As shown inFIGS. 4, 5, and 6, a plurality of sheath-side lips20that protrude inward are formed as rings that extend along the circumferential direction of the sheath fitting portion18on the inner circumferential surface of the sheath fitting portion18. In the state where the sheath fitting portion18is fitted around the end portion14A of the sheath14, the sheath-side lips20are in intimate contact with the outer circumferential surface of the sheath14. This seals the rubber plug15and the sheath14.

As shown inFIGS. 4, 5, and 6, an electrical wire through-hole portion21is provided at the front end portion (end portion that is opposite to the sheath fitting portion18) of the rubber plug15, and the electrical wire through-hole portion21has a plurality (four in the present embodiment) of through-holes22A,22B,22C, and22D for passage of the first electrical wire13A, the second electrical wire13B, the third electrical wire13C, and the fourth electrical wire13D respectively. The through-holes22A,22B,22C, and22D include a first through-hole22A for passage of the first electrical wire13A, a second through-hole22B for passage of the second electrical wire13B, a third through-hole22C for passage of the third electrical wire13C, and a fourth through-hole22D for passage for the fourth electrical wire13D.

As shown inFIG. 7, the cross-sectional shape of the electrical wire through-hole portion21is a trapezoid having rounded corners. The cross-sectional shape of the electrical wire through-hole portion21includes a long side, a short side that is shorter than the long side and is parallel with the long side, and two inclined sides that link end portions of the long side to end portions of the short side.

The first through-hole22A and the second through-hole22B are formed side-by-side along the direction in which the long side extends at positions in the electrical wire through-hole portion21that are arranged on the long side. Also, the third through-hole22C and the fourth through-hole22D are formed side-by-side along the direction in which the short side extends at positions in the electrical wire through-hole portion21that are arranged on the short side.

The inner diameter of the first through-hole22A is somewhat larger than the outer diameter of the first electrical wire13A. As shown inFIG. 7, first electrical wire-side lips26A that come into intimate contact with the outer circumferential surface of the first electrical wire13A are formed as rings that extend along the circumferential direction of the first through-hole22A on the inner circumferential surface of the first through-hole22A. In the state where the first electrical wire13A passes through the interior of the first through-hole22A, the first electrical wire-side lips26A are in intimate contact with the outer circumferential surface of the first electrical wire13A. This seals the first electrical wire13A and the rubber plug15.

The inner diameter of the second through-hole22B is somewhat larger than the outer diameter of the second electrical wire13B. As shown inFIG. 7, second electrical wire-side lips26B that come into intimate contact with the outer circumferential surface of the second electrical wire13B are formed as rings that extend along the circumferential direction of the second through-hole22B on the inner circumferential surface of the second through-hole22B. In the state where the second electrical wire13B passes through the interior of the second through-hole22B, the second electrical wire-side lips26B are in intimate contact with the outer circumferential surface of the second electrical wire13B. This seals the second electrical wire13B and the rubber plug15.

The inner diameter of the third through-hole22C is somewhat larger than the outer diameter of the third electrical wire13C. As shown inFIG. 7, third electrical wire-side lips26C that come into intimate contact with the outer circumferential surface of the third electrical wire13C are formed as rings that extend along the circumferential direction of the third through-hole22C on the inner circumferential surface of the third through-hole22C. In the state where the third electrical wire13C passes through the interior of the third through-hole22C, the third electrical wire-side lips26C are in intimate contact with the outer circumferential surface of the third electrical wire13C. This seals the third electrical wire13C and the rubber plug15.

The inner diameter of the fourth through-hole22D is somewhat larger than the outer diameter of the fourth electrical wire13D. As shown inFIG. 7, fourth electrical wire-side lips26D that come into intimate contact with the outer circumferential surface of the fourth electrical wire13D are formed as rings that extend along the circumferential direction of the fourth through-hole22D on the inner circumferential surface of the fourth through-hole22D. In the state where the fourth electrical wire13D passes through the interior of the fourth through-hole22D, the fourth electrical wire-side lips26D are in intimate contact with the outer circumferential surface of the fourth electrical wire13D. This seals the fourth electrical wire13D and the rubber plug15.

As shown inFIGS. 4 to 6, a holding portion28for holding the guide member16is formed at a position on the rubber plug15that is inside the sheath fitting portion18and between the sheath-side lips20and the electrical wire through-hole portion21. The guide member16has a plurality (four in the present embodiment) of guide holes38A,38B,38C, and38D for passage of the first electrical wire13A, the second electrical wire13B, the third electrical wire13C, and the fourth electrical wire13D respectively.

As shown inFIGS. 4 to 6, the cap17made of a synthetic resin is fitted around the rubber plug15. The cap17is fitted around the rubber plug15from the side (right side inFIG. 4) on which the first electrical wire13A, the second electrical wire13B, the third electrical wire13C, and the fourth electrical wire13D extend out from the end portion14A of the sheath14. The cap17is open toward the sheath14(leftward inFIG. 4) from the side from which the first electrical wire13A, the second electrical wire13B, the third electrical wire13C, and the fourth electrical wire13D extend out. The open end edge of the cap17is in contact with the flange portion19of the rubber plug15.

The cap17is provided with a wide portion30that is fitted around the sheath fitting portion18of the rubber plug15at a position on the open end edge side (left side inFIG. 4) of the cap17. As shown inFIG. 8, the cross-sectional shape of the wide portion30is approximately circular and conforms to the outer shape of the sheath fitting portion18. The inner circumferential surface of the wide portion30comes into intimate contact with a plurality (three in the present embodiment) of wide portion-side lips31that are formed on the outer circumferential surface of the sheath fitting portion18. As shown inFIG. 7, the wide portion-side lips31are formed on the outer circumferential surface of the sheath fitting portion18, protruding outward and extending along the circumferential direction of the sheath fitting portion18. When the wide portion-side lips31and the inner circumferential surface of the wide portion30of the cap17are in intimate contact, the wide portion30of the cap17and the sheath fitting portion18of the rubber plug15are sealed.

As shown inFIGS. 4 to 6, in the state where the wide portion30of the cap17is fitted around the sheath fitting portion18of the rubber plug15, the wide portion30presses the sheath fitting portion18inward in the radial direction of the sheath fitting portion18. Accordingly, the sheath fitting portion18is pressed against the outer circumferential surface of the sheath14from the outside. Accordingly, the sheath-side lips20of the sheath fitting portion18reliably come into intimate contact with the outer circumferential surface of the sheath14.

As shown inFIGS. 4 to 6, a narrow portion34that is fitted around the electrical wire through-hole portion21of the rubber plug15is provided at a position in the cap17that is opposite (right side inFIG. 4, and frontward F) to the direction in which the cap17is open relative to the wide portion30. The outer diameter of the narrow portion34is set to be smaller than the outer diameter of the wide portion30. As shown inFIG. 9, the cross-sectional shape of the narrow portion34is a rounded-corner trapezoid that conforms to the outer shape of the electrical wire through-hole portion21.

As shown inFIGS. 4 to 6, the inner circumferential surface of the narrow portion34comes into intimate contact with a plurality (three in the present embodiment) of narrow portion-side lips35formed on the outer circumferential surface of the electrical wire through-hole portion21. As shown inFIG. 7, the narrow portion-side lips35are formed on the outer circumferential surface of the electrical wire through-hole portion21, protruding outward and extending along the circumferential direction of the electrical wire through-hole portion21. When the narrow portion-side lips35come into intimate contact with the inner circumferential surface of the narrow portion34of the cap17, the narrow portion34of the cap17and the electrical wire through-hole portion21of the rubber plug15are sealed.

As shown inFIGS. 4 to 6, in the state where the narrow portion34of the cap17is fitted around the electrical wire through-hole portion21of the rubber plug15, the narrow portion34presses the electrical wire through-hole portion21inward in the radial direction of the electrical wire through-hole portion21. Accordingly, the electrical wire through-hole portion21is compressed from the outside. Accordingly, the first to fourth electrical wire-side lips26A,26B,26C, and26D formed on the inner circumferential surfaces of the first to fourth through-holes22A,22B,22C, and22D are reliably brought into intimate contact with the radially outer sides of the first to fourth electrical wires13A,13B,13C, and13D respectively.

As shown inFIGS. 4 to 6, the cap17is provided with a bottom wall36at a position that is opposite to the direction in which the cap17is open. As shown inFIG. 9, a first lead-out hole37A, a second lead-out hole37B, a third lead-out hole37C, and a fourth lead-out hole37D are formed in the bottom wall36, passing through the bottom wall36such that the first electrical wire13A, the second electrical wire13B, the third electrical wire13C, and the fourth electrical wire13D respectively extend out from the cap17.

As shown inFIGS. 4 to 6, the first to fourth through-holes22A,22B,22C, and22D formed in the rubber plug15are aligned with the first to fourth lead-out holes37A,37B,37C, and37D formed in the cap17. More specifically, the first through-hole22A and the first lead-out hole37A are aligned with each other, the second through-hole22B and the second lead-out hole37B are aligned with each other, the third through-hole22C and the third lead-out hole37C are aligned with each other, and the fourth through-hole22D and the fourth lead-out hole37D are aligned with each other.

As shown inFIGS. 4 and 5, the guide member16is made of a synthetic resin, and is provided with a first guide hole38A for passage of the first electrical wire13A, a second guide hole38B for passage of the second electrical wire13B, a third guide hole38C for passage of the third electrical wire13C, and a fourth guide hole38D for passage of the fourth electrical wire13D.

As shown inFIGS. 4 and 5, the first to fourth through-holes22A,22B,22C, and22D of the rubber plug15are respectively aligned with the first to fourth guide holes38A,38B,38C, and38D of the guide member16. More specifically, the first through-hole22A and the first guide hole38A are aligned with each other, the second through-hole22B and the second guide hole38B are aligned with each other, the third through-hole22C and the third guide hole38C are aligned with each other, and the fourth through-hole22D and the fourth guide hole38D are aligned with each other.

As shown inFIG. 10, the holder52includes a first holder52A and a second holder52B formed integrally with this first holder52A via a hinge52C. The first holder52A and the second holder52B are attached to each other by elastic engagement of locking portions69and locking reception portions70.

As shown inFIGS. 4 and 5, a rear end portion of the holder52is provided with the sheath holding portions60configured to hold the sheath14from the outside. The sheath holding portions60are provided with holding ribs61that protrude inwardly and extend in the circumferential direction of the sheath holding portions60. A plurality (three in the present embodiment) of the holding ribs61are spaced apart from each other in the longitudinal direction. The holding ribs61hold the sheath14by coming into contact with the outer circumferential surface of the sheath14from the outside. Accordingly, shifting of relative positions of the multicore cable11and the holder52is suppressed.

As shown inFIG. 11, a binding member90is wrapped around the sheath holding portions60. The sheath holding portions60are pressed inward in the radial direction by this binding member90. Accordingly, the inner circumferential surface of the sheath14and the outer surfaces of the first to fourth electrical wires13A,13B,13C, and13D are in intimate contact with each other. As a result, the sheath14and the first to fourth electrical wires13A,13B,13C, and13D are positioned.

As shown inFIGS. 2 and 12, the binding member90includes a band portion91having a belt shape, a retaining portion94that is attached to one end portion92of the band portion91and is configured to retain the other end portion93of the band portion91in a direction opposite to the direction in which the band portion91pass through the retaining portion94, in a state in which the other end portion93of the band portion91passes through the retaining portion94. The binding member90may also be made of a synthetic resin or metal, and any material can be selected as appropriate as necessary. Also, a known structure can be selected as the binding member90as appropriate.

Although not shown in detail, the retaining portion94has an insertion hole for passage of the band portion91. The inner surface of the insertion hole is provided with an engagement reception portion (not shown) configured to lock to an engagement portion (not shown) formed in the band portion91. When the engagement portion of the band portion91locks to the engagement reception portion of the retaining portion94, the other end portion93of the band portion91is retained in the direction opposite to the direction in which the band portion91passes through the retaining portion94.

As shown inFIG. 10, a front end portion of the holder52is shaped as a hood that is open frontward. The cap17is fitted into the holder52from the front of the holder52.

The front end portion of the holder52is provided with two locking portions53(one example of a rubber plug holding portion) that extend frontward. The locking portion53is approximately gate-shaped, and has two elastic deformation portions54and a linking portion55that links the front end portions of the elastic deformation portions54. The two locking portions53are formed at symmetrical positions in the holder52.

The front end portions of the holder52are provided with protection portions56that cover the locking portions53. The front end portion of the locking portion53is arranged at the same position as the front end portion of the protection portion56or at a position that is lower than the front end portion of the protection portion56slightly rearward in the longitudinal direction. Accordingly, the protection portion56suppresses collision of foreign matter with the locking portion53.

As shown inFIGS. 8 and 9, the outer surface of the cap17is provided with locking protrusions57protruding outward. The rear surface of the locking protrusions57is formed as a gently inclined surface, and the front surface of the locking protrusion57is formed in an upright shape with respect to the outer surface of the cap17.

When the cap17is fitted from the front of the holder52, the rear surfaces of the locking protrusions57and the linking portions55of the locking portions53come into contact with each other. The elastic deformation portions54of the locking portions53undergo elastic deformation outwardly in the radial direction of the cap. Furthermore, when the cap17is pushed into the holder52, the linking portions55get over the locking protrusions57, and the elastic deformation portions54undergo return deformation. When the linking portions55come into contact with the front surfaces of the locking protrusions57from the front, the cap is prevented from coming off frontward. Accordingly, shifting of relative positions of the multicore cable11and the holder52in the longitudinal direction is suppressed (seeFIG. 4).

Also, when the holder52engages with the cap17, shifting of relative positions of the holder52and the rubber plug15around which the cap17is fitted is suppressed.

As shown inFIGS. 8 and 9, the cap17is provided with two guide ribs58(one example of the guide portion) that protrude outward and extend in the longitudinal direction at positions located on the side of the locking protrusions57. On the other hand, the holder is provided with guide grooves59(one example of the guided portion) for receiving the guide ribs58at positions located on the side of the locking portions53, the guide grooves extending in the longitudinal direction. When the guide ribs58slide against the inner surfaces of the guide grooves59, the cap17is guided to a position at which the locking protrusions57of the cap17and the locking portions53of holder52elastically lock to each other.

As shown inFIG. 13, the outer surfaces of the guide ribs58and the inner surfaces of the guide grooves59come into contact with each other in the circumferential direction of the cap, and thereby shifting of the position of the cap in the circumferential direction is reliably suppressed.

Effects of Embodiments

Next, the effects of the present embodiment will be described. The seal structure12for the multicore cable11according to the present embodiment includes the multicore cable11in which the first electrical wire13A to the fourth electrical wire13D are enveloped by the sheath14, the rubber plug15that is fitted around the end portion14A of the sheath14and have the first to fourth through-holes22A to22D through which the first to fourth electrical wires13A to14D respectively pass, and the holder52having the sheath holding portion60configured to hold the sheath14and suppress shifting of the position of the sheath14relative to the multicore cable11, in which the holder52has the locking portions53configured to hold the rubber plug15and suppress movement of the rubber plug15in a direction (frontward F) in which the rubber plug15comes off from the end portion14A of the sheath14.

This prevents the rubber plug15from coming off from the end portion14A of the sheath14. Also, the sheath14is held by the holder52by the sheath holding portion60. As a result, relative positions of the sheath14and the rubber plug15in the longitudinal direction are held by the holder52. Accordingly, the rubber plug15is reliably pressed against the sheath14and the first electrical wire13A to the fourth electrical wire13D, and thus it is possible to improve the sealing property of the multicore cable11.

The cap17that is fitted around the rubber plug15is included, and movement of the rubber plug15in a direction (frontward F) in which the rubber plug15comes off from the end portion of the sheath14is suppressed by engagement of the locking portions53and the cap17.

According to the above-described configuration, because an internal pressure can be applied to the rubber plug15by the cap17that is fitted around the rubber plug15, the sealing property of the multicore cable11can be further improved.

Also, according to the present embodiment, the cap17is provided with the guide ribs58, the holder52is provided with the guide grooves59configured to slide against the guide ribs58, and when the guide ribs58slide against the guide grooves59, the locking portions53are guided to positions at which the locking portions53lock to the cap17.

According to the above-described configuration, it is possible to reliably lock the holder52and the cap17together, and thus to reliably improve the sealing property of the multicore cable11.

Also, according to the present embodiment, the holder52has protection portions56that cover the locking portions53.

According to the above-described configuration, contact of foreign matter with the locking portions53is suppressed. This suppresses the release of the structure in which the locking portions53and the cap17(rubber plug15) are locked together, and thus the sealing property of the multicore cable11can be further improved.

The binding member90is wrapped around the sheath holding portion60in a state in which the sheath holding portion60is pressed inward in the radial direction.

According to the above-described configuration, the sheath14is pressed inward in the radial direction of the sheath14by the binding member90. As a result, the inner circumferential surface of the sheath14and the outer surfaces of the first electrical wire13A to the fourth electrical wire13D are in intimate contact with each other, and thus the sheath14and the first electrical wire13A to the fourth electrical wire13D are reliably fixed to each other.

Other Embodiments

The technology disclosed in the present specification is not limited to the embodiments described above using the foregoing description and drawings, and embodiments such as the following are also encompassed in the technical scope of the present invention.

The number of electrical wires arranged in the multicore cable11may also be two, three, five or more.

Although the plurality of electrical wires are configured to include two types of electrical wires having different outer diameters, the present invention is not limited to this, and a configuration is also possible in which the electrical wires include three or more types of electrical wires having different outer diameter.

The outer diameters of the plurality of electrical wires may also be the same.

The electrical wires may also be shielded electrical wires. Also, the electrical wires may be stranded wires that include a core wire obtained by twisting a plurality of metal strands, or may be so-called single-core wires in which the core wire is a metal rod member. In this way, any electrical wires can be appropriately selected as necessary as the electrical wire.

The multicore cable11may also be a so-called cab tire cable, or may be a multicore shielded wire in which a plurality of electrical wires are enveloped by a shielding layer. In this way, any multicore cable11can be appropriately selected as necessary as the multicore cable11.

According to the seal member10of the present embodiment, any liquid such as water, oil, or an organic solvent can be sealed out as necessary.

Although in the present embodiment, a configuration was adopted in which the cap17is provided with the guide ribs58and the holder is provided with the guide grooves59, the present invention is not limited to this, and a configuration is also possible in which the cap17is provided with guide grooves and the holder52is provided with guide ribs.

The number of guide ribs58formed on the cap17may also be one, two, three, four, or more.

The cap17may also be omitted. In this case, the rubber plug15locks to the locking portions53of the holder52.

LIST OF REFERENCE NUMERALS

11Multicore cable12Seal structure13A First electrical wire13B Second electrical wire13C Third electrical wire13D Fourth electrical wire14Sheath15Rubber plug17Cap22A First through-hole22B Second through-hole22C Third through-hole22D Fourth through-hole52Holder53Locking portion (rubber plug holding portion)56Protection portion58Guide rib59Guide groove60Sheath holding portion62Cap holding portion65A First electrical wire routing portion65B Second electrical wire routing portion67Bracket90Binding memberF Frontward (direction in which rubber plug comes off from end portion of sheath)