WO2016098734A1 - Terminal waterproofing structure of electric cable with terminal fitting - Google Patents

Terminal waterproofing structure of electric cable with terminal fitting Download PDF

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Publication number
WO2016098734A1
WO2016098734A1 PCT/JP2015/084963 JP2015084963W WO2016098734A1 WO 2016098734 A1 WO2016098734 A1 WO 2016098734A1 JP 2015084963 W JP2015084963 W JP 2015084963W WO 2016098734 A1 WO2016098734 A1 WO 2016098734A1
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WO
WIPO (PCT)
Prior art keywords
electric wire
rigidity
water stop
terminal
low
Prior art date
Application number
PCT/JP2015/084963
Other languages
French (fr)
Japanese (ja)
Inventor
明訓 吉澤
山田　直樹
篤史 石川
弘之 豊原
Original Assignee
住友電装株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友電装株式会社 filed Critical 住友電装株式会社
Publication of WO2016098734A1 publication Critical patent/WO2016098734A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/56—Means for preventing chafing or fracture of flexible leads at outlet from coupling part
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Definitions

  • the present invention relates to a terminal water stop structure of a terminal fitting electric wire, and more particularly to a terminal water stop structure of a terminal fitting electric wire provided with a resin water stop block at a terminal portion where a terminal is mounted.
  • the end of the water blocking block on the electric wire side has a tapered shape that gradually decreases in diameter from the insulating resin crimping portion of the terminal fitting to the periphery of the outer sheath of the electric wire.
  • the ground wire cannot be grounded in a wet area such as in the engine room of an automobile, and it is necessary to ground the ground wire after drawing it into the vehicle interior, resulting in an increase in cost and weight due to an increase in the wire length. There was a problem of inviting.
  • the material of the water blocking block is hard, good water stoppage can be obtained in a portion where the shape is stable, such as between the conductor crimping portion and the insulating resin crimping portion of the terminal fitting, Since the flexibility is low, when the outer sheath of the insulation-coated electric wire peels off at the inner peripheral edge portion of the end portion, the peeling easily proceeds to the inner back side of the water blocking block. Therefore, there has been a problem that the length of the tapered portion is increased in order to ensure the required water stopping performance.
  • the water blocking block when the material of the water blocking block is soft, the water blocking block is likely to be deformed or damaged even in a portion where the shape is stable, such as between the conductor compression portion of the terminal metal fitting and the insulating resin crimping portion. There was a problem that there was a concern about the deterioration of water stoppage performance under severe use environment.
  • the present invention has been made to solve such a conventional problem, and ensures the followability and adhesion to the electric wire at the electric wire side end of the water blocking block, and the connection between the terminal fitting and the insulated coated electric wire. It aims at providing the terminal water stop structure of the electric wire with a terminal metal fitting which can ensure the water stop performance of the water stop part which coat
  • the present invention provides a terminal water stop structure for an electric wire with a terminal fitting, which includes a resin water stop block that covers an end portion of an insulated coated electric wire coupled to a terminal fitting for electrical connection.
  • the water blocking block covers the terminal fitting and the coupling portion between the end portions of the insulation-coated electric wire and is in close contact with the outer peripheral surface of the end portion of the outer sheath of the insulation-coated electric wire.
  • a cylindrical portion that protrudes in a cylindrical shape along the outer skin of the insulation-coated electric wire, and the cylindrical portion includes a plurality of low-rigidity portions having a smaller cross-sectional area than the water stop portion, and the low-rigidity portions, respectively.
  • a plurality of high-rigidity parts that have a larger cross-sectional area than the part and are in close contact with the outer skin are alternately arranged adjacent to each other in the axial direction, and the tubular part is preset in accordance with the bending of the insulation-coated wire.
  • the plurality of high-rigidity portions are Characterized in that it pressed against the waterproof part with pressure-contact with each other in some direction.
  • the cylindrical portion of the water blocking block has a plurality of low rigidity portions, so that the rigidity of the water blocking portion becomes low in the bending direction and the twisting direction of the insulated coated electric wire, and follows the outer skin. It becomes easy and the deformation
  • the outer sheath of the insulation-coated wire peel off at the inner peripheral edge portion of the end portion of the water blocking block, and the peeling does not easily proceed from the inner peripheral edge portion of the end portion of the water blocking block to the inner back side.
  • the highly rigid portion of the tubular portion is in close contact with the outer skin, a good water stoppage between the inner peripheral surface of the tubular portion and the outer sheath of the insulated coated electric wire can be obtained.
  • the tubular portion reaches a predetermined radius of curvature or less with the bending of the insulation-coated electric wire, the plurality of high-rigidity portions are pressed against each other at a part in the circumferential direction and pressed against the water stop portion.
  • At least one of the plurality of low-rigidity parts and the plurality of high-rigidity parts is an arbitrary bending of the insulation-coated electric wire at one end side and the other end side in the axial direction of the cylindrical part.
  • the cylindrical portion has a shape different from each other so that the rigidity in the direction and the torsion direction is different, and the rigidity at the one end side of the cylindrical portion close to the water stop portion is close to the water stop portion. It may be higher than the rigidity on the other end side.
  • the water stopping performance of the water stopping portion that secures the followability and adhesion to the electric wire at the electric wire side end portion of the water stopping block and covers the joint between the terminal fitting and the insulated coated electric wire to stop the water.
  • a terminal water stop structure for the electric wire with terminal fittings capable of ensuring the stability.
  • FIG. 2 A is the principal part top view which shows 1st Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention.
  • FIG. 2: B is the principal part bottom view which shows 1st Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention.
  • 3A is a left side view of the first embodiment of the terminal water stop structure of the electric wire with terminal fitting according to the present invention as viewed from the left side of FIG. 3B is a cross-sectional view taken along arrow IIIb-IIIb in FIG.
  • or 4 has shown 1st Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention.
  • This embodiment is an example in which the present invention is applied to a wire harness including an electric wire with a terminal fitting for ground wiring mounted on an automobile.
  • the wire harness of the present embodiment is configured to include the electric wire 10 with terminal fittings shown in FIGS.
  • an electric wire 10 with a terminal fitting covers an electric wire 11, a terminal fitting 12 crimped to one end of the electric wire 11, and one end portion 11 e of the electric wire 11 coupled to the terminal fitting 12. And a water stop block 13 made of resin.
  • the electric wire 11 includes a core wire portion 11a such as an annealed copper stranded wire composed of a plurality of conductor wires, and an outer skin 11b made of an insulating resin such as vinyl chloride that covers the core wire portion 11a over substantially the entire length direction. It is an insulation covering electric wire which has.
  • a core wire portion 11a such as an annealed copper stranded wire composed of a plurality of conductor wires
  • an outer skin 11b made of an insulating resin such as vinyl chloride that covers the core wire portion 11a over substantially the entire length direction. It is an insulation covering electric wire which has.
  • the electric wire 11 is a thick electric wire having a relatively large diameter among those used as, for example, an in-vehicle grounding electric wire, and has a cross-sectional area of the core wire portion 11a of 5 mm 2 or more, for example, about 8 mm 2. Compared with a thin electric wire having a sectional area of the portion 11a of about 2 to 3 mm 2 , the bending rigidity is high.
  • One end portion 11e of the electric wire 11 is exposed such that the core wire portion 11a protrudes from the end portion of the outer skin 11b by a predetermined exposure length, and the other end portion of the electric wire 11 is not shown in detail.
  • it is connected to an engine control device or an auxiliary machine (a part of vehicle electrical equipment).
  • the terminal fitting 12 is a plate terminal, for example, a round plate terminal, which is pressed using a metal plate having good conductivity.
  • the terminal fitting 12 has an annular plate-like connecting portion 12a and a protrusion 12b for preventing rotation or misassembly on the tip side.
  • the terminal fitting 12 includes a wire barrel portion 12c caulked so as to be crimped to the core portion 11a of the electric wire 11 on the proximal end side coupled to the electric wire 11. And an insulating resin barrel portion 12d crimped so as to be crimped to the outer skin 11b of the electric wire 11.
  • the core wire portion 11a and the outer skin 11b of the electric wire 11 and the wire barrel portion 12c and the insulating resin barrel portion 12d of the terminal fitting 12 constitute a coupling portion 14 between the terminal fitting 12 and one end portion 11e of the electric wire 11. Yes.
  • the terminal fitting 12 is grounded by bolting the connecting portion 12a to a ground connecting portion on the vehicle body side (not shown) of the automobile, for example, a ground connecting portion in the engine room.
  • the terminal fitting 12 further reinforces the stepped bent portion 12e and the stepped bent portion 12e between the tip side connecting portion 12a and the wire barrel portion 12c in the water blocking block 13 and the stepped bent portion 12e. And a rib-like protruding and bent portion 12f.
  • the water blocking block 13 is formed of a resin of a water blocking agent that is cured in a state where it penetrates into the gaps between the strands of the core wire part 11a or the gaps between the core wire part 11a and the outer skin 11b.
  • the water stop block 13 is configured to cover one end portion 11e of the electric wire 11 coupled to the terminal fitting 12 with a water stop agent resin to stop water.
  • a water stop agent resin to stop water.
  • the inside of the electric wire 11 connected to the terminal fitting is negatively pressurized.
  • a differential pressure may be generated inside and outside the electric wire 11 by suction.
  • the water stop agent of the water stop block 13 is a so-called hot melt (registered trademark) type adhesive resin, for example, a moisture-curing type silicon resin-based resin. Adhesiveness to the element wire of the portion 11a, the terminal fitting 12 and the like, and rubber elasticity to a degree of relatively high hardness with respect to the outer skin 11b of the electric wire 11 can be produced.
  • the water blocking block 13 includes a water blocking portion 31 that covers the joint portion 14 between the terminal fitting 12 and the one end portion 11e of the electric wire 11 and is in close contact with the outer peripheral surface 11c of the outer skin 11b, and the water blocking portion thereof. 31 and a cylindrical portion 32 protruding in a cylindrical shape along the outer skin 11 b of the electric wire 11.
  • the water stop portion 31 includes a large-diameter portion 31c that surrounds the coupling portion 14 of the electric wire 11 and the terminal fitting 12 near the center of the water stop block 13, particularly in the vicinity of the insulating resin barrel portion 12d, and a stepped bent portion 12e of the terminal fitting 12. And a small-diameter portion 31b surrounding only the vicinity.
  • the water stop portion 31 has a maximum width in the plate width direction and the plate thickness direction of the terminal fitting 12 at the large diameter portion 31c, and a minimum width in the plate width direction and the plate thickness direction of the terminal fitting 12 at the small diameter portion 31b. It has become.
  • the water stop portion 31 basically has a substantially constant water stop agent resin layer thickness with respect to the outer shape of the joint portion 14 between the terminal fitting 12 and the one end portion 11e of the electric wire 11. Is formed. Therefore, the shape of the outer peripheral surface 31a of the water stop portion 31 is a stepped shape in the same direction as the outer shape of the coupling portion 14 between the small diameter portion 31b and the large diameter portion 31c.
  • the cylindrical portion 32 that surrounds only the outer peripheral surface 11d adjacent to the end of the outer sheath 11b of the electric wire 11 has a small diameter and a small thickness with respect to the large diameter portion 31c of the water stop portion 31.
  • the edge adjacent outer peripheral surface 11d mentioned here is an outer peripheral surface having a predetermined width (axial length) adjacent to the end outer peripheral surface 11c of the outer skin 11b.
  • the cylindrical portion 32 includes a plurality of annular low-rigidity portions 32a having a smaller cross-sectional area than the water stop portion 31, and a plurality of annular plate-shaped high-rigidities each having a larger cross-sectional area than the low-rigidity portion 32a and closely contacting the outer skin 11b.
  • the rigid portions 32b are alternately provided so as to be adjacent to each other in the axial direction.
  • the lengths of the plurality of low-rigidity portions 32a and the plurality of high-rigidity portions 32b in the axial direction of the cylindrical portion 32 can be press-contacted by the number of high-rigidity portions 32b described later.
  • the axial direction length of the some high rigidity part 32b is larger than the axial direction length of the some low rigidity part 32a.
  • the cylindrical portion 32 is more specifically, a first low-rigidity portion 32 a 1 that protrudes from the right end surface in FIG. And a first high-rigidity portion 32b1 having an annular plate shape having a larger diameter than the first low-rigidity portion 32a1, which is integrally and concentrically connected to the distal end side of the low-rigidity portion 32a1.
  • cylindrical portion 32 is integrated with the second low-rigidity portion 32a2 projecting substantially annularly from the end surface on the right side of the first high-rigidity portion 32b1 in FIG. 1 and the distal end side of the second low-rigidity portion 32a2. And a concentrically connected second high-rigidity portion 32b2 having a larger diameter than the second low-rigidity portion 32a2, and an end face on the right side in FIG. 1 of the second high-rigidity portion 32b2.
  • a third low-rigidity portion 32a3 projecting in an annular shape and an annular plate-like shape having a larger diameter than the third low-rigidity portion 32a3 integrally and concentrically connected to the distal end side of the third low-rigidity portion 32a3 And a third high-rigidity portion 32b3.
  • the plurality of low-rigidity portions 32a includes an annular portion 32e that surrounds the outer skin 11b of the electric wire 11 and a plurality of high-rigidity portions that are spaced apart from each other at equal intervals in the circumferential direction of the cylindrical portion 32.
  • a plurality of vertical rib portions 32f that protrude radially outward to the vicinity of the outer periphery of 32b and partially connect the outer peripheral portions of the plurality of high-rigidity portions 32b are configured.
  • the cylindrical portion 32 has a plurality of vertical rib portions 32f while having a sufficiently low bending rigidity with respect to the bending of the electric wire 11 in the thickness direction of the terminal fitting 12 that is likely to occur exclusively in the mounting posture of the electric wire 10 with terminal fitting. Therefore, the required torsional rigidity is secured.
  • the plurality of vertical rib portions 32f may be arranged 90 degrees between each pair of adjacent low-rigidity portions 32a. Moreover, when the bending direction of the electric wire 11 is not limited or changes, the plurality of low-rigidity portions 32a may be configured by only the annular portion 32e without providing the plurality of vertical rib portions 32f, or the cylindrical portion The radius of the plurality of vertical rib portions 32f from the center of 32 may be made smaller, that is, smaller than the radius of the plurality of high-rigidity portions 32b having a plurality of annular plate shapes.
  • the cylindrical portion 32 has a cylindrical inner peripheral surface 32i in which the inner peripheral surfaces of the plurality of low-rigidity portions 32a and the plurality of high-rigidity portions 32b are integrated, and this cylindrical inner peripheral surface 32i is The wire 11 is in close contact with the outer skin 11b.
  • the inner peripheral surface 32i is bonded to the outer peripheral surface 11d adjacent to the end portion of the outer skin 11b when the water-stopping resin forming the water blocking block 13 is cured.
  • the terminal fitting 12 when the connecting portion 12a of the terminal fitting 12 is bolted to the ground connecting portion on the vehicle body side and the electric wire 10 with terminal fitting is mounted on the automobile, or in a subsequent use state, the terminal fitting.
  • the bending of the electric wire 11 with respect to 12 can occur.
  • the some highly rigid part 32b of the cylindrical part 32 is those circumferential directions. A part of the outer peripheral portion 32d is pressed against each other in the axial direction, and the outer peripheral portion 32d that is press-contacted to the water stop portion 31 as a whole.
  • the cylindrical portion 32 of the water blocking block 13 has a plurality of low-rigidity portions 32a. It becomes low rigidity in the direction and torsional direction, and it becomes easy to follow the outer skin 11b of the electric wire 11.
  • the deformation of the outer skin 11b accompanying the bending or twisting of the electric wire 11 does not concentrate on the inner peripheral edge portion of the end portion of the water stop portion 31 of the water stop block 13, and the outer periphery adjacent to the end portion which is an adhesive surface with the tubular portion 32. Dispersed within the range of the surface 11d.
  • the outer skin 11b of the electric wire 11 is difficult to peel off at the end inner peripheral edge portion of the water stop portion 31 of the water stop block 13, and peeling progresses from the cylindrical portion 32 side to the end inner peripheral edge portion side of the water stop portion 31. It becomes difficult, and the progress of peeling further to the inner back side than the inner peripheral edge portion of the end portion of the water stop portion 31 is prevented.
  • the plurality of high-rigidity portions 32b of the cylindrical portion 32 are in close contact with the outer skin 11b and the end portion of the cylindrical portion 32 is highly rigid, peeling at the inner peripheral edge of the end portion of the cylindrical portion 32 is prevented. Effectively suppressed, peeling between the inner peripheral surface 32 i of the cylindrical portion 32 and the outer skin 11 b of the electric wire 11 is suppressed, and good water stoppage within the cylindrical portion 32 is obtained.
  • trackability and the adhesiveness with respect to the electric wire 11 of the cylindrical part 32 used as the electric wire side edge part of the water stop block 13 can be ensured, and the terminal metal fitting 12 is provided. It becomes the terminal water stop structure which can ensure the water stop performance of the water stop part 31 which coat
  • the grounding in the engine room of the automobile can be performed, so that the length of the electric wire 10 with terminal fittings serving as a grounding wire can be greatly reduced as compared with the conventional case where the grounding is performed by pulling into the vehicle interior side. Therefore, the cost and weight of the wire harness using the electric wire 10 with terminal fittings can be reduced.
  • FIG. 5 shows a second embodiment of the terminal water stop structure of the electric wire with terminal fitting according to the present invention.
  • each embodiment described below has an overall schematic configuration similar to that of the first embodiment described above, and is a cylindrical shape that protrudes from the water stop portion 31 of the water stop block 13 to the electric wire 11 side. Only the shape of the part is different from the cylindrical part 32 in the first embodiment. Therefore, in the following description of each embodiment, the same reference numerals as those in FIGS. 1 to 4 are used for configurations similar to those of the first embodiment, and only differences are described.
  • the water blocking block 13 covers the connecting portion 14 between the terminal fitting 12 and one end portion 11e of the electric wire 11, and the outer peripheral surface of the end portion of the outer cover 11b. It has the water stop part 31 closely_contact
  • the cylindrical portion 42 includes a plurality of annular low-rigidity portions 42a having a smaller cross-sectional area than the water stop portion 31, and a plurality of annular plate-shaped high-rigidities each having a larger cross-sectional area than the low-rigidity portion 42a and closely contacting the outer skin 11b.
  • the portions 42b are continuously arranged so as to be adjacent to each other in the axial direction.
  • the inner peripheral surface 42 i of the cylindrical portion 42 is in close contact with the outer peripheral surface 11 d adjacent to the end of the outer skin 11 b of the electric wire 11.
  • the plurality of high-rigidity parts 42b are rounded at the outer periphery, and the cylindrical part 42 has an accordion-like appearance.
  • the electric wire 10 with a terminal metal fitting of the present embodiment it is possible to ensure the followability and adhesion to the electric wire 11 of the tubular portion 42 that is the electric wire side end portion of the water blocking block 13. It becomes the terminal water stop structure which can ensure the water stop performance of the water stop part 31 which coat
  • FIG. 6 shows a third embodiment of the terminal water stop structure of the electric wire with terminal fitting according to the present invention.
  • the water blocking block 13 covers the connecting portion 14 between the terminal fitting 12 and one end portion 11e of the electric wire 11, and the outer peripheral surface of the end portion of the outer cover 11b. It has the water stop part 31 closely_contact
  • the cylindrical portion 52 includes a plurality of annular low-rigidity portions 52a having a smaller cross-sectional area than the water stop portion 31, and a plurality of annular plate-shaped high-rigidities each having a larger cross-sectional area than the low-rigidity portion 52a and closely contacting the outer skin 11b.
  • the parts 52b are alternately arranged adjacent to each other in the axial direction.
  • the inner peripheral surface 52 i of the cylindrical portion 52 is in close contact with the outer peripheral surface 11 d adjacent to the end of the outer skin 11 b of the electric wire 11.
  • the plurality of high-rigidity portions 52b are formed so that the outer peripheral surface has a substantially U-shaped cross-sectional shape, or the outer peripheral portions at both ends are chamfered.
  • the electric wire 10 with a terminal metal fitting of the present embodiment it is possible to ensure followability and adhesion to the electric wire 11 of the cylindrical portion 52 that is the electric wire side end portion of the water blocking block 13. It becomes the terminal water stop structure which can ensure the water stop performance of the water stop part 31 which coat
  • FIG. 7 shows a fourth embodiment of a terminal water stop structure for an electric wire with terminal fitting according to the present invention.
  • the water blocking block 13 covers the connecting portion 14 between the terminal fitting 12 and one end portion 11e of the electric wire 11, and the outer peripheral surface of the end portion of the outer cover 11b. It has the water stop part 31 closely_contact
  • the cylindrical portion 62 includes a plurality of annular low-rigidity portions 62a having a smaller cross-sectional area than the water stop portion 31 and a plurality of annular plate-shaped high-rigidities each having a larger cross-sectional area than the low-rigidity portion 62a and closely contacting the outer skin 11b.
  • the parts 62b are connected in series so as to be alternately adjacent in the axial direction.
  • the inner peripheral surface 62 i of the tubular portion 62 is in close contact with the outer peripheral surface 11 d adjacent to the end of the outer skin 11 b of the electric wire 11.
  • At least one of the plurality of low-rigidity parts 62a and the plurality of high-rigidity parts 62b are one end side and the other end side in the axial direction of the cylindrical part 62, and an arbitrary bending direction of the electric wire 11 and They have different shapes so that the rigidity differs in the torsional direction.
  • the bending rigidity and the torsional rigidity at the base end part 62c (one end side) of the cylindrical part 62 close to the water stop part 31 are higher than those at the front end part 62d (the other end side) away from the water stop part 31. ing.
  • the cylindrical portion 62 is integrated with the first low-rigidity portion 62a1 protruding from the right end surface of the water stop portion 31 in FIG. 7 and the distal end side of the first low-rigidity portion 62a1. And a first high-rigidity portion 62b1 having an annular plate shape larger in diameter than the first low-rigidity portion 62a1 concentrically connected.
  • the cylindrical portion 62 has a second low-rigidity portion 62a2 having a smaller diameter than the first low-rigidity portion 62a1 that protrudes from the right end surface of the first high-rigidity portion 62b1 in FIG.
  • a second annular plate-like second member integrally and concentrically connected to the distal end side of the second low-rigidity part 62a2 and having a larger diameter than the second low-rigidity part 62a2 and a smaller diameter than the first high-rigidity part 62b1.
  • a high-rigidity portion 62b2 is a high-rigidity portion 62b2.
  • the cylindrical portion 62 has a third low-rigidity portion 62a3 having a diameter smaller than that of the second low-rigidity portion 62a2 that protrudes annularly from an end surface on the right side of the second high-rigidity portion 62b2 in FIG.
  • An annular plate-like third high-diameter having a larger diameter than the third low-rigidity portion 62a3 and a smaller diameter than the second high-rigidity portion 62b2, which is integrally and concentrically connected to the distal end side of the low-rigidity portion 62a3.
  • a rigid portion 62b3 is integrally and concentrically connected to the distal end side of the low-rigidity portion 62a3.
  • the first high-rigidity portion 62b1, the second high-rigidity portion 62b2, and the third high-rigidity portion 62b3 constituting the plurality of high-rigidity portions 62b have smaller outer diameters as they approach the distal end side of the cylindrical portion 62. However, they may have the same outer diameter.
  • trackability and adhesiveness with respect to the electric wire 11 of the cylindrical part 62 used as the electric wire side edge part of the water stop block 13 are ensured similarly to each above-mentioned embodiment. It becomes a terminal water stop structure which can ensure the water stop performance of the water stop part 31 which covers the coupling
  • FIG. 8 shows a fifth embodiment of the terminal water stop structure of the electric wire with terminal fitting according to the present invention.
  • the water blocking block 13 covers the connecting portion 14 between the terminal fitting 12 and one end portion 11e of the electric wire 11, and the outer peripheral surface of the end portion of the outer cover 11b. It has the water stop part 31 closely_contact
  • the cylindrical portion 72 includes a plurality of annular low-rigidity portions 72a having a smaller cross-sectional area than the water-stop portion 31, and a plurality of annular plate-shaped high-rigidities each having a larger cross-sectional area than the low-rigidity portion 72a and closely contacting the outer skin 11b.
  • the portions 72b are connected in series so as to be alternately adjacent in the axial direction.
  • the inner peripheral surface 72i of the cylindrical part 72 is closely_contact
  • At least one of the plurality of low-rigidity portions 72a and the plurality of high-rigidity portions 72b are at one end side and the other end side in the axial direction of the cylindrical portion 72, and in any bending direction of the electric wire 11 and They have different shapes so that the rigidity differs in the torsional direction.
  • first low-rigidity portion 72a1 protruding from the right end surface in FIG. 8 of the water stop portion 31 and the tip end side of the first low-rigidity portion 72a1 are integrally and concentrically connected.
  • the cylindrical portion 72 is a second low-rigidity portion having a larger axial length than the first low-rigidity portion 72a1 that protrudes from the right end surface of the first high-rigidity portion 72b1 in FIG. 72a2 and the second low-rigidity portion 72a2 are integrally and concentrically connected to the distal end side of the second low-rigidity portion 72a2, and have a larger diameter than the second low-rigidity portion 72a2 and a smaller axial length than the first high-rigidity portion 72b1.
  • the cylindrical portion 72 is annularly projected from the right end surface of the second high-rigidity portion 72b2 in FIG. 8, and has a third low-rigidity portion 72a3 having a larger axial length than the second low-rigidity portion 72a2. And a circle that is integrally and concentrically connected to the distal end side of the third low-rigidity portion 72a3 and has a larger diameter than the third low-rigidity portion 72a3 and a smaller axial length than the second high-rigidity portion 72b2.
  • the first high-rigidity portion 72b1, the second high-rigidity portion 72b2, and the third high-rigidity portion 72b3 constituting the plurality of high-rigidity portions 72b are axially longer as they approach the distal end side of the cylindrical portion 72. Is small (thin), but may have the same axial length (thickness).
  • trackability and the adhesiveness with respect to the electric wire 11 of the cylindrical part 72 used as the electric wire side edge part of the water stop block 13 are ensured like the above-mentioned each embodiment. It becomes a terminal water stop structure which can ensure the water stop performance of the water stop part 31 which covers the coupling
  • the axial length of the cylindrical portion 32 is smaller than that of the water stop portion 31, but the axial length may be larger than that of the water stop portion 31.
  • the cylindrical portions 32, 42, 52, 62, and 72 are illustrated as having a circular cross section, the outer peripheral surface may be non-circular, for example, a polygon. It goes without saying that the number of the plurality of low-rigidity portions 32a, 42a, 52a, 62a, 72a and the plurality of high-rigidity portions 32b, 42b, 52b, 62b, 72b is an arbitrary number of two or more.
  • the terminal fitting 12 is crimped to the end portion 11e of the electric wire 11.
  • a terminal fitting in which the insulating resin barrel portion 12d is omitted and the wire barrel portion 12c is elongated may be used.
  • the properties of the water-stopping resin forming the water-stopping block 13, particularly the hardness after curing and rubber elasticity, etc. can be appropriately set according to the hardness and thickness of the coating.
  • the present invention ensures the followability and adhesion to the electric wire at the electric wire side end of the water blocking block, and covers the joint between the terminal fitting and the insulated coated electric wire to stop the water.
  • the terminal water stop structure of the electric wire with a terminal metal fitting which can ensure the water stop performance of this stably can be provided.
  • the present invention is useful for the entire terminal water stop structure of an electric wire with a terminal fitting provided with a water stop block made of resin at a terminal portion to which a terminal is attached.
  • Electric wire with terminal bracket 11 Electric wire (insulated coated electric wire) 11a Core wire part 11b Outer skin (insulating resin) 11c End outer peripheral surface 11d End adjacent outer peripheral surface (outer peripheral surface adjacent to the end) 11e End portion 12 Terminal fitting 12a Connection portion 12b Protrusion 12c Wire barrel portion 12d Insulating resin barrel portion 13 Water stop block 14 Coupling portion 31 Water stop portion 31a Outer peripheral surface 32, 42, 52, 62, 72 Cylindrical portions 32a, 42a, 52a, 62a, 72a Multiple low-rigidity portions 32b, 42b, 52b, 62b, 72b Multiple high-rigidity portions 32e Annular portion 32f Vertical rib portion 32i, 42i, 52i, 62i, 72i Inner peripheral surface 32a1, 62a1, 72a1 First 1 low-rigidity portion 32a2, 62a2, 72a2 second low-rigidity portion 32a3, 62a3, 72a3 third low-rigidity portion 32b1, 62b1, 72b

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  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Insulated Conductors (AREA)
  • Processing Of Terminals (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

A waterproofing block (13) which covers an end portion of an insulator-covered electric cable (11) joined to a terminal fitting (12) comprises: a waterproofing portion (31) which covers a joint portion (14) between the terminal fitting (12) and the electric cable (11), and which is in close contact with an end portion outer peripheral surface (11c) of an outer sheath (11b) of the electric cable (11); and a tubular portion (32) which protrudes from the waterproofing portion (31) along the outer sheath (11b). The tubular portion (32) is formed from a plurality of low-rigidity portions (32a) having a cross-sectional area that is smaller than that of the waterproofing portion (31), and a plurality of high-rigidity portions (32b) which have a cross-sectional area that is larger than that of the low-rigidity portions, and which are in close contact with the outer sheath (11b), the low-rigidity portions and the high-rigidity portions being provided alternately, adjacent to one another in a connected manner. If bending of the electric cable (11) causes the radius of curvature of the tubular portion (32) to reach or fall below a certain radius of curvature, portions of the plurality of high-rigidity portions (32b) press against one another in the circumferential direction, and press against the waterproofing portion (31).

Description

端子金具付電線の端末止水構造Terminal water stop structure for electric wires with terminal fittings
　本発明は、端子金具付電線の端末止水構造に関し、特に端子が装着された端末部に樹脂製の止水ブロックを備えた端子金具付電線の端末止水構造に関する。 The present invention relates to a terminal water stop structure of a terminal fitting electric wire, and more particularly to a terminal water stop structure of a terminal fitting electric wire provided with a resin water stop block at a terminal portion where a terminal is mounted.
　車両に搭載されるアース電線等において、電気接続用の端子金具に結合される絶縁被覆電線の端部を被覆して防水（電線内部に対し止水）する樹脂製の止水ブロックを備えた端子金具付電線の端末止水構造を有するものがある。 A terminal equipped with a water-stop block made of resin that covers the end of an insulation-coated wire that is connected to a terminal fitting for electrical connection, and is waterproofed (water is stopped against the inside of the wire) in a ground wire mounted on a vehicle Some have a terminal water stop structure for metal wires with brackets.
　この種の端子金具付電線の端末止水構造として、例えば絶縁被覆電線の外皮による被覆の端部を剥した導体の露出端部と、外皮で囲まれた隣接する絶縁樹脂部とを、それぞれの圧着部を有する端子金具に圧着し、その圧着部分を取り囲むよう樹脂製の止水ブロックを射出成形するものが知られている（例えば、特許文献１参照）。 As the terminal water stop structure of this type of electric wire with terminal fittings, for example, the exposed end of the conductor stripped from the end of the sheath of the insulated coated wire and the adjacent insulating resin portion surrounded by the outer cover, There is known a technique in which a resin water-stop block is injection-molded so as to be crimped to a terminal fitting having a crimped portion and surround the crimped portion (see, for example, Patent Document 1).
　このものでは、止水ブロックの電線側の端部が、端子金具の絶縁樹脂圧着部から電線の外皮の周囲へと徐々に縮径するテーパ形状をなしている。 In this case, the end of the water blocking block on the electric wire side has a tapered shape that gradually decreases in diameter from the insulating resin crimping portion of the terminal fitting to the periphery of the outer sheath of the electric wire.
特開２００２－１２７１８８号公報JP 2002-127188 A
　しかし、前述のような従来の端子金具付電線の端末止水構造にあっては、太物のアース線等のように曲げや捩りに対する剛性が高く、その曲率半径が大きくなる電線の場合に、その電線の曲げや捩りに際して止水ブロックの端部の内周縁部分とそこに接着する絶縁被覆電線の外皮の一部とに応力が集中し、止水ブロックの端部の内周縁部分で絶縁被覆電線の外皮が剥離し易かった。そのため、例えばアース線を自動車のエンジンルーム内のような被水領域内でアース処理できず、車室内側に引き込んでからアース処理するといった必要が生じ、電線長の増大によるコスト高や重量増加を招くという問題があった。 However, in the terminal water stop structure of the conventional electric wire with terminal fitting as described above, in the case of an electric wire having a high rigidity against bending and twisting such as a thick earth wire, the radius of curvature of the electric wire is large. When the wire is bent or twisted, stress concentrates on the inner peripheral edge of the end of the water blocking block and a part of the outer sheath of the insulating coated electric wire that adheres to the inner peripheral edge of the water blocking block. The outer sheath of the wire was easy to peel off. For this reason, for example, the ground wire cannot be grounded in a wet area such as in the engine room of an automobile, and it is necessary to ground the ground wire after drawing it into the vehicle interior, resulting in an increase in cost and weight due to an increase in the wire length. There was a problem of inviting.
　また、止水ブロックの材料が硬質である場合、端子金具の導体圧着部および絶縁樹脂圧着部の間のように形状が安定している部分では良好な止水性が得られるものの、テーパ形状部の可撓性が低いため、その端部の内周縁部分で絶縁被覆電線の外皮が剥離すると、その剥離が止水ブロックの内奥側に進行し易くなっていた。そのため、所要の止水性能を確保するために、テーパ形状部分の長さが大きくなってしまうという問題があった。 In addition, when the material of the water blocking block is hard, good water stoppage can be obtained in a portion where the shape is stable, such as between the conductor crimping portion and the insulating resin crimping portion of the terminal fitting, Since the flexibility is low, when the outer sheath of the insulation-coated electric wire peels off at the inner peripheral edge portion of the end portion, the peeling easily proceeds to the inner back side of the water blocking block. Therefore, there has been a problem that the length of the tapered portion is increased in order to ensure the required water stopping performance.
　一方、止水ブロックの材料が軟質である場合、端子金具の導体圧縮部と絶縁樹脂圧着部の間のように形状が安定している部分でも止水ブロックが変形したり傷付いたりし易く、過酷な使用環境下での止水性能の低下が懸念されるという問題があった。 On the other hand, when the material of the water blocking block is soft, the water blocking block is likely to be deformed or damaged even in a portion where the shape is stable, such as between the conductor compression portion of the terminal metal fitting and the insulating resin crimping portion. There was a problem that there was a concern about the deterioration of water stoppage performance under severe use environment.
　本発明は、このような従来の課題を解決すべくなされたものであり、止水ブロックの電線側端部の電線に対する追従性および密着性を確保するとともに、端子金具と絶縁被覆電線との結合部を被覆する止水部の止水性能を安定確保することのできる端子金具付電線の端末止水構造を提供することを目的とする。 The present invention has been made to solve such a conventional problem, and ensures the followability and adhesion to the electric wire at the electric wire side end of the water blocking block, and the connection between the terminal fitting and the insulated coated electric wire. It aims at providing the terminal water stop structure of the electric wire with a terminal metal fitting which can ensure the water stop performance of the water stop part which coat | covers a part stably.
　本発明は、上記目的達成のため、電気接続用の端子金具に結合される絶縁被覆電線の端部を被覆する樹脂製の止水ブロックを備えた端子金具付電線の端末止水構造であって、前記止水ブロックは、前記端子金具および前記絶縁被覆電線の端部の結合部を被覆するとともに前記絶縁被覆電線の外皮の端部外周面に密着する止水部と、該止水部から前記絶縁被覆電線の前記外皮に沿って筒状に突出する筒状部とを有しており、前記筒状部は、前記止水部より横断面積が小さい複数の低剛性部と、それぞれ前記低剛性部より横断面積が大きく前記外皮に密着する複数の高剛性部とを、交互に軸方向に隣り合うよう連設してなり、前記絶縁被覆電線の曲げに伴って前記筒状部が予め設定された曲率半径以下に達するとき、前記複数の高剛性部が、周方向の一部で互いに圧接するとともに前記止水部に圧接することを特徴とする。 In order to achieve the above object, the present invention provides a terminal water stop structure for an electric wire with a terminal fitting, which includes a resin water stop block that covers an end portion of an insulated coated electric wire coupled to a terminal fitting for electrical connection. The water blocking block covers the terminal fitting and the coupling portion between the end portions of the insulation-coated electric wire and is in close contact with the outer peripheral surface of the end portion of the outer sheath of the insulation-coated electric wire. A cylindrical portion that protrudes in a cylindrical shape along the outer skin of the insulation-coated electric wire, and the cylindrical portion includes a plurality of low-rigidity portions having a smaller cross-sectional area than the water stop portion, and the low-rigidity portions, respectively. A plurality of high-rigidity parts that have a larger cross-sectional area than the part and are in close contact with the outer skin are alternately arranged adjacent to each other in the axial direction, and the tubular part is preset in accordance with the bending of the insulation-coated wire. The plurality of high-rigidity portions are Characterized in that it pressed against the waterproof part with pressure-contact with each other in some direction.
　この構成により、本発明では、止水ブロックの筒状部が、複数の低剛性部を有することで止水部に対し絶縁被覆電線の曲げ方向や捩り方向で低剛性となって外皮に追従し易くなり、絶縁被覆電線の曲げや捩りに伴う外皮の変形が、止水ブロックの端部の内周縁部分に集中することなく、筒状部との接着面の範囲内に分散される。したがって、止水ブロックの端部の内周縁部分で絶縁被覆電線の外皮が剥離し難くなるとともに、止水ブロックの端部の内周縁部分から内奥側に剥離が進行し難くなる。また、筒状部の高剛性部が外皮に密着しているので、筒状部の内周面と絶縁被覆電線の外皮との良好な止水性が得られる。さらに、絶縁被覆電線の曲げに伴って前記筒状部が予め設定された曲率半径以下に達すると、複数の高剛性部が周方向の一部で互いに圧接するとともに止水部に圧接することで、筒状部のそれ以上の曲げが有効に抑制され、絶縁被覆電線の曲げに伴う外皮の大きな変形が止水部側に波及することが、有効に抑制される。その結果、止水ブロックの電線側端部の電線に対する追従性および密着性を確保するとともに、端子金具と絶縁被覆電線との結合部を被覆する止水部の止水性能を安定確保することのできる端子金具付電線の端末止水構造となる。 With this configuration, in the present invention, the cylindrical portion of the water blocking block has a plurality of low rigidity portions, so that the rigidity of the water blocking portion becomes low in the bending direction and the twisting direction of the insulated coated electric wire, and follows the outer skin. It becomes easy and the deformation | transformation of the outer skin accompanying the bending and twist of an insulation coating electric wire is disperse | distributed in the range of the adhesive surface with a cylindrical part, without concentrating on the inner peripheral part of the edge part of a water stop block. Therefore, it is difficult for the outer sheath of the insulation-coated wire to peel off at the inner peripheral edge portion of the end portion of the water blocking block, and the peeling does not easily proceed from the inner peripheral edge portion of the end portion of the water blocking block to the inner back side. In addition, since the highly rigid portion of the tubular portion is in close contact with the outer skin, a good water stoppage between the inner peripheral surface of the tubular portion and the outer sheath of the insulated coated electric wire can be obtained. Further, when the tubular portion reaches a predetermined radius of curvature or less with the bending of the insulation-coated electric wire, the plurality of high-rigidity portions are pressed against each other at a part in the circumferential direction and pressed against the water stop portion. Further bending of the tubular portion is effectively suppressed, and it is effectively suppressed that a large deformation of the outer skin accompanying the bending of the insulation-coated electric wire spreads to the water stop portion side. As a result, it is possible to ensure the followability and adhesion to the electric wire at the electric wire side end of the water stop block, and to stably ensure the water stop performance of the water stop portion that covers the joint between the terminal fitting and the insulated coated electric wire. It becomes the terminal water stop structure of the electric wire with a terminal metal fitting which can be done.
　本発明において、前記複数の低剛性部と前記複数の高剛性部とのうち少なくとも一方は、前記筒状部の前記軸方向の一端側と他端側とで、前記絶縁被覆電線の任意の曲げ方向および捩り方向についての剛性が相違するように互いに異なる形状を有しており、前記止水部に近い前記筒状部の前記一端側における前記剛性が、前記止水部に近い前記筒状部の前記他端側における前記剛性より高くなっていてもよい。 In the present invention, at least one of the plurality of low-rigidity parts and the plurality of high-rigidity parts is an arbitrary bending of the insulation-coated electric wire at one end side and the other end side in the axial direction of the cylindrical part. The cylindrical portion has a shape different from each other so that the rigidity in the direction and the torsion direction is different, and the rigidity at the one end side of the cylindrical portion close to the water stop portion is close to the water stop portion. It may be higher than the rigidity on the other end side.
　このようにすると、絶縁被覆電線の曲げに伴う外皮の変形が止水部側に波及することが、より有効に抑制される。 In this way, it is possible to more effectively suppress the deformation of the outer skin accompanying the bending of the insulation-coated electric wire from spreading to the water stop portion side.
　本発明によれば、止水ブロックの電線側端部の電線に対する追従性および密着性を確保するとともに、端子金具と絶縁被覆電線との結合部を被覆し止水する止水部の止水性能を安定確保することのできる端子金具付電線の端末止水構造を提供することができる。 According to the present invention, the water stopping performance of the water stopping portion that secures the followability and adhesion to the electric wire at the electric wire side end portion of the water stopping block and covers the joint between the terminal fitting and the insulated coated electric wire to stop the water. Thus, it is possible to provide a terminal water stop structure for the electric wire with terminal fittings capable of ensuring the stability.
本発明に係る端子金具付電線の端末止水構造の第１の実施の形態を示すその要部正面図である。It is the principal part front view which shows 1st Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention. 図２Ａは、本発明に係る端子金具付電線の端末止水構造の第１の実施の形態を示すその要部平面図である。FIG. 2: A is the principal part top view which shows 1st Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention. 図２Ｂは、本発明に係る端子金具付電線の端末止水構造の第１の実施の形態を示すその要部底面図である。FIG. 2: B is the principal part bottom view which shows 1st Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention. 図３Ａは、本発明に係る端子金具付電線の端末止水構造の第１の実施の形態を図１の左側から見た左側面図である。3A is a left side view of the first embodiment of the terminal water stop structure of the electric wire with terminal fitting according to the present invention as viewed from the left side of FIG. 図３Ｂは、図１のＩＩＩｂ－ＩＩＩｂ矢視断面図である。3B is a cross-sectional view taken along arrow IIIb-IIIb in FIG. 本発明に係る端子金具付電線の端末止水構造の第１の実施の形態の作用説明図である。It is effect | action explanatory drawing of 1st Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention. 本発明に係る端子金具付電線の端末止水構造の第２の実施の形態を示すその要部正面図である。It is the principal part front view which shows 2nd Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention. 本発明に係る端子金具付電線の端末止水構造の第３の実施の形態を示すその要部正面図である。It is the principal part front view which shows 3rd Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention. 本発明に係る端子金具付電線の端末止水構造の第４の実施の形態を示すその止水ブロックの筒状部付近の要部拡大正面図である。It is a principal part enlarged front view of the cylindrical part vicinity of the water stop block which shows 4th Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention. 本発明に係る端子金具付電線の端末止水構造の第５の実施の形態を示すその止水ブロックの筒状部付近の要部拡大正面図である。It is a principal part enlarged front view of the cylindrical part vicinity of the water stop block which shows 5th Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention.
　以下、本発明を実施するための形態について図面を参照して説明する。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
　（第１の実施の形態）
　図１ないし図４は、本発明に係る端子金具付電線の端末止水構造の第１の実施の形態を示している。この実施の形態は、本発明を自動車に搭載されるアース配線用の端子金具付電線を含むワイヤハーネスに適用した例である。 (First embodiment)
FIG. 1 thru | or 4 has shown 1st Embodiment of the terminal water stop structure of the electric wire with a terminal metal fitting which concerns on this invention. This embodiment is an example in which the present invention is applied to a wire harness including an electric wire with a terminal fitting for ground wiring mounted on an automobile.
　まず、本実施形態の構成について説明する。 First, the configuration of this embodiment will be described.
　本実施形態のワイヤハーネスは、図１ないし図３に示す端子金具付電線１０を含んで構成されている。 The wire harness of the present embodiment is configured to include the electric wire 10 with terminal fittings shown in FIGS.
　図１に示すように、端子金具付電線１０は、電線１１と、電線１１の一端側に例えば圧着された端子金具１２と、端子金具１２に結合される電線１１の一方の端部１１ｅを被覆する樹脂製の止水ブロック１３と、を含んで構成されている。 As shown in FIG. 1, an electric wire 10 with a terminal fitting covers an electric wire 11, a terminal fitting 12 crimped to one end of the electric wire 11, and one end portion 11 e of the electric wire 11 coupled to the terminal fitting 12. And a water stop block 13 made of resin.
　電線１１は、複数本の導体素線で構成された軟銅より線等の芯線部１１ａと、その芯線部１１ａを長さ方向の略全域で被覆する塩化ビニル等の絶縁樹脂からなる外皮１１ｂとを有する絶縁被覆電線である。 The electric wire 11 includes a core wire portion 11a such as an annealed copper stranded wire composed of a plurality of conductor wires, and an outer skin 11b made of an insulating resin such as vinyl chloride that covers the core wire portion 11a over substantially the entire length direction. It is an insulation covering electric wire which has.
　電線１１は、例えば車載用のアース電線として使用されるもののうち、比較的大径となる太物の電線であり、芯線部１１ａの断面積が５ｍｍ２以上、例えば８ｍｍ２程度のもので、芯線部１１ａの断面積が２ないし３ｍｍ２程度の細い電線に比べると、曲げ剛性が高いものである。 The electric wire 11 is a thick electric wire having a relatively large diameter among those used as, for example, an in-vehicle grounding electric wire, and has a cross-sectional area of the core wire portion 11a of 5 mm 2 or more, for example, about 8 mm 2. Compared with a thin electric wire having a sectional area of the portion 11a of about 2 to 3 mm 2 , the bending rigidity is high.
　この電線１１の一方の端部１１ｅは、芯線部１１ａが外皮１１ｂの端部から所定の露出長さだけ突出するように露出しており、電線１１の他方の端部は、詳細を図示しないが、例えばエンジンの制御装置あるいは補機（車両用電装品の一部）に接続されている。 One end portion 11e of the electric wire 11 is exposed such that the core wire portion 11a protrudes from the end portion of the outer skin 11b by a predetermined exposure length, and the other end portion of the electric wire 11 is not shown in detail. For example, it is connected to an engine control device or an auxiliary machine (a part of vehicle electrical equipment).
　図２および図３に示すように、端子金具１２は、導電性のよい金属板を材料としてプレス加工された板端子、例えば丸形の板端子となっている。この端子金具１２は、その先端側に、円環板状の接続部１２ａと、回り止めまたは誤組付け防止用の突起１２ｂとを有している。 As shown in FIG. 2 and FIG. 3, the terminal fitting 12 is a plate terminal, for example, a round plate terminal, which is pressed using a metal plate having good conductivity. The terminal fitting 12 has an annular plate-like connecting portion 12a and a protrusion 12b for preventing rotation or misassembly on the tip side.
　また、図１、図２Ａおよび図４に示すように、端子金具１２は、電線１１に結合するその基端側に、電線１１の芯線部１１ａに圧着するようにかしめられたワイヤバレル部１２ｃと、電線１１の外皮１１ｂに圧着するようにかしめられた絶縁樹脂バレル部１２ｄとを有している。 As shown in FIGS. 1, 2A and 4, the terminal fitting 12 includes a wire barrel portion 12c caulked so as to be crimped to the core portion 11a of the electric wire 11 on the proximal end side coupled to the electric wire 11. And an insulating resin barrel portion 12d crimped so as to be crimped to the outer skin 11b of the electric wire 11.
　そして、電線１１の芯線部１１ａおよび外皮１１ｂと端子金具１２のワイヤバレル部１２ｃおよび絶縁樹脂バレル部１２ｄとは、端子金具１２と電線１１の一方の端部１１ｅとの結合部１４を構成している。 Then, the core wire portion 11a and the outer skin 11b of the electric wire 11 and the wire barrel portion 12c and the insulating resin barrel portion 12d of the terminal fitting 12 constitute a coupling portion 14 between the terminal fitting 12 and one end portion 11e of the electric wire 11. Yes.
　この端子金具１２は、接続部１２ａを自動車の図示しない車体側の接地接続部、例えばエンジンルーム内の接地接続部にボルト締結されてアース処理されるようになっている。 The terminal fitting 12 is grounded by bolting the connecting portion 12a to a ground connecting portion on the vehicle body side (not shown) of the automobile, for example, a ground connecting portion in the engine room.
　端子金具１２は、さらに、先端側の接続部１２ａと止水ブロック１３内のワイヤバレル部１２ｃとの間に、段付き曲げ加工された段付き曲げ部１２ｅと、その段付き曲げ部１２ｅを補強するリブ状の突出し曲げ加工部１２ｆとを有している。 The terminal fitting 12 further reinforces the stepped bent portion 12e and the stepped bent portion 12e between the tip side connecting portion 12a and the wire barrel portion 12c in the water blocking block 13 and the stepped bent portion 12e. And a rib-like protruding and bent portion 12f.
　止水ブロック１３は、芯線部１１ａの素線間の隙間や芯線部１１ａと外皮１１ｂの間の隙間に浸透した状態で硬化した止水剤の樹脂によって形成されている。 The water blocking block 13 is formed of a resin of a water blocking agent that is cured in a state where it penetrates into the gaps between the strands of the core wire part 11a or the gaps between the core wire part 11a and the outer skin 11b.
　すなわち、止水ブロック１３は、端子金具１２に結合される電線１１の一方の端部１１ｅを止水剤の樹脂により被覆し止水するように構成されている。なお、未硬化の止水剤の樹脂を芯線部１１ａの素線間の隙間や芯線部１１ａと外皮１１ｂの間の隙間に浸透させるために、例えば端子金具に結合する電線１１の内部を負圧吸引して、電線１１の内外に差圧を生じさせてもよい。 That is, the water stop block 13 is configured to cover one end portion 11e of the electric wire 11 coupled to the terminal fitting 12 with a water stop agent resin to stop water. In order to infiltrate the uncured water-stopping resin into the gaps between the strands of the core wire part 11a and the gaps between the core wire part 11a and the outer skin 11b, for example, the inside of the electric wire 11 connected to the terminal fitting is negatively pressurized. A differential pressure may be generated inside and outside the electric wire 11 by suction.
　止水ブロック１３の止水剤は、いわゆるホットメルト（登録商標）タイプの接着剤樹脂、例えば湿気硬化型のシリコン樹脂系のものであり、加熱、成形および硬化により、電線１１の外皮１１ｂ、芯線部１１ａの素線、端子金具１２等に対する接着性と、電線１１の外皮１１ｂに対し相対的に高硬度となる程度のゴム弾性とを生じ得るものである。 The water stop agent of the water stop block 13 is a so-called hot melt (registered trademark) type adhesive resin, for example, a moisture-curing type silicon resin-based resin. Adhesiveness to the element wire of the portion 11a, the terminal fitting 12 and the like, and rubber elasticity to a degree of relatively high hardness with respect to the outer skin 11b of the electric wire 11 can be produced.
　また、止水ブロック１３は、端子金具１２と電線１１の一方の端部１１ｅとの結合部１４を被覆するとともに外皮１１ｂの端部外周面１１ｃに密着する止水部３１と、その止水部３１から電線１１の外皮１１ｂに沿って筒状に突出する筒状部３２とを有している。 The water blocking block 13 includes a water blocking portion 31 that covers the joint portion 14 between the terminal fitting 12 and the one end portion 11e of the electric wire 11 and is in close contact with the outer peripheral surface 11c of the outer skin 11b, and the water blocking portion thereof. 31 and a cylindrical portion 32 protruding in a cylindrical shape along the outer skin 11 b of the electric wire 11.
　止水部３１は、止水ブロック１３の中央付近、特に絶縁樹脂バレル部１２ｄ付近で電線１１と端子金具１２の結合部１４を取り囲む大径部３１ｃと、端子金具１２の段付き曲げ部１２ｅの近傍のみを取り囲む小径部３１ｂとを有している。 The water stop portion 31 includes a large-diameter portion 31c that surrounds the coupling portion 14 of the electric wire 11 and the terminal fitting 12 near the center of the water stop block 13, particularly in the vicinity of the insulating resin barrel portion 12d, and a stepped bent portion 12e of the terminal fitting 12. And a small-diameter portion 31b surrounding only the vicinity.
　また、止水部３１は、大径部３１ｃにおいて端子金具１２の板幅方向および板厚方向に最大幅となっており、小径部３１ｂで端子金具１２の板幅方向および板厚方向に最小幅となっている。 Further, the water stop portion 31 has a maximum width in the plate width direction and the plate thickness direction of the terminal fitting 12 at the large diameter portion 31c, and a minimum width in the plate width direction and the plate thickness direction of the terminal fitting 12 at the small diameter portion 31b. It has become.
　また、止水部３１は、その他の部分では、基本的に端子金具１２と電線１１の一方の端部１１ｅとの結合部１４の外形に対し略一定の止水剤樹脂層厚となるように形成されている。したがって、止水部３１の外周面３１ａの形状は、小径部３１ｂと大径部３１ｃの間で、結合部１４の外形と同方向の段付き形状をなしている。 Further, in the other portions, the water stop portion 31 basically has a substantially constant water stop agent resin layer thickness with respect to the outer shape of the joint portion 14 between the terminal fitting 12 and the one end portion 11e of the electric wire 11. Is formed. Therefore, the shape of the outer peripheral surface 31a of the water stop portion 31 is a stepped shape in the same direction as the outer shape of the coupling portion 14 between the small diameter portion 31b and the large diameter portion 31c.
　電線１１の外皮１１ｂの端部隣接外周面１１ｄのみを取り囲む筒状部３２は、止水部３１の大径部３１ｃに対して小径および肉薄になっている。ここにいう端部隣接外周面１１ｄは、外皮１１ｂの端部外周面１１ｃに隣接する所定幅（軸方向長さ）の外周面である。 The cylindrical portion 32 that surrounds only the outer peripheral surface 11d adjacent to the end of the outer sheath 11b of the electric wire 11 has a small diameter and a small thickness with respect to the large diameter portion 31c of the water stop portion 31. The edge adjacent outer peripheral surface 11d mentioned here is an outer peripheral surface having a predetermined width (axial length) adjacent to the end outer peripheral surface 11c of the outer skin 11b.
　この筒状部３２は、止水部３１より横断面積が小さい円環状の複数の低剛性部３２ａと、それぞれ低剛性部３２ａより横断面積が大きく外皮１１ｂに密着する円環板状の複数の高剛性部３２ｂとを、交互に軸方向に隣り合うように連設したものである。 The cylindrical portion 32 includes a plurality of annular low-rigidity portions 32a having a smaller cross-sectional area than the water stop portion 31, and a plurality of annular plate-shaped high-rigidities each having a larger cross-sectional area than the low-rigidity portion 32a and closely contacting the outer skin 11b. The rigid portions 32b are alternately provided so as to be adjacent to each other in the axial direction.
　この筒状部３２の軸方向における複数の低剛性部３２ａと複数の高剛性部３２ｂの長さ（以下、単に軸方向長さという）は、後述する数の高剛性部３２ｂ同士の圧接が可能な形態であれば特に限定されないが、例えば複数の低剛性部３２ａの軸方向長さより複数の高剛性部３２ｂの軸方向長さの方が大きくなっている。 The lengths of the plurality of low-rigidity portions 32a and the plurality of high-rigidity portions 32b in the axial direction of the cylindrical portion 32 (hereinafter simply referred to as axial lengths) can be press-contacted by the number of high-rigidity portions 32b described later. Although it will not specifically limit if it is a form, For example, the axial direction length of the some high rigidity part 32b is larger than the axial direction length of the some low rigidity part 32a.
　図１中に部分拡大図で示すように、筒状部３２は、より具体的には、止水部３１の図１中の右側の端面から突出する第１の低剛性部３２ａ１と、第１の低剛性部３２ａ１の先端側に一体にかつ同心的に連結された、第１の低剛性部３２ａ１より大径の円環板状の第１の高剛性部３２ｂ１と、を有している。 As shown in the partial enlarged view in FIG. 1, the cylindrical portion 32 is more specifically, a first low-rigidity portion 32 a 1 that protrudes from the right end surface in FIG. And a first high-rigidity portion 32b1 having an annular plate shape having a larger diameter than the first low-rigidity portion 32a1, which is integrally and concentrically connected to the distal end side of the low-rigidity portion 32a1.
　さらに、筒状部３２は、第１の高剛性部３２ｂ１の図１中の右側の端面から略環状に突出する第２の低剛性部３２ａ２と、第２の低剛性部３２ａ２の先端側に一体にかつ同心的に連結された、第２の低剛性部３２ａ２より大径の円環板状の第２の高剛性部３２ｂ２と、第２の高剛性部３２ｂ２の図１中の右側の端面から環状に突出する第３の低剛性部３２ａ３と、第３の低剛性部３２ａ３の先端側に一体にかつ同心的に連結された、第３の低剛性部３２ａ３より大径の円環板状の第３の高剛性部３２ｂ３と、を有している。 Further, the cylindrical portion 32 is integrated with the second low-rigidity portion 32a2 projecting substantially annularly from the end surface on the right side of the first high-rigidity portion 32b1 in FIG. 1 and the distal end side of the second low-rigidity portion 32a2. And a concentrically connected second high-rigidity portion 32b2 having a larger diameter than the second low-rigidity portion 32a2, and an end face on the right side in FIG. 1 of the second high-rigidity portion 32b2. A third low-rigidity portion 32a3 projecting in an annular shape and an annular plate-like shape having a larger diameter than the third low-rigidity portion 32a3 integrally and concentrically connected to the distal end side of the third low-rigidity portion 32a3 And a third high-rigidity portion 32b3.
　また、図３Ｂに示すように、複数の低剛性部３２ａは、電線１１の外皮１１ｂを取り囲む円環状部分３２ｅと、互いに筒状部３２の周方向に等間隔に離間しつつ複数の高剛性部３２ｂの外周近傍まで放射外方向に突出し、複数の高剛性部３２ｂの外周部同士を部分的に結合する複数の縦リブ部分３２ｆを含んで構成されている。したがって、筒状部３２は、端子金具付電線１０の実装姿勢で専ら生じ易い端子金具１２の板厚方向への電線１１の曲げに対して十分に低曲げ剛性にしながら、複数の縦リブ部分３２ｆによって所要の捩り剛性が担保されている。 Further, as shown in FIG. 3B, the plurality of low-rigidity portions 32a includes an annular portion 32e that surrounds the outer skin 11b of the electric wire 11 and a plurality of high-rigidity portions that are spaced apart from each other at equal intervals in the circumferential direction of the cylindrical portion 32. A plurality of vertical rib portions 32f that protrude radially outward to the vicinity of the outer periphery of 32b and partially connect the outer peripheral portions of the plurality of high-rigidity portions 32b are configured. Therefore, the cylindrical portion 32 has a plurality of vertical rib portions 32f while having a sufficiently low bending rigidity with respect to the bending of the electric wire 11 in the thickness direction of the terminal fitting 12 that is likely to occur exclusively in the mounting posture of the electric wire 10 with terminal fitting. Therefore, the required torsional rigidity is secured.
　複数の縦リブ部分３２ｆは、隣り合う各一対の低剛性部３２ａの間で９０度捩れた配置形態となっていてもよい。また、電線１１の曲げ方向が限定されない場合や変化する場合、複数の低剛性部３２ａは、複数の縦リブ部分３２ｆを設けずに円環状部分３２ｅのみで構成されてもよいし、筒状部３２の中心からの複数の縦リブ部分３２ｆの半径を小さく、すなわち、複数の円環板状の複数の高剛性部３２ｂの半径より小さくしてもよい。 The plurality of vertical rib portions 32f may be arranged 90 degrees between each pair of adjacent low-rigidity portions 32a. Moreover, when the bending direction of the electric wire 11 is not limited or changes, the plurality of low-rigidity portions 32a may be configured by only the annular portion 32e without providing the plurality of vertical rib portions 32f, or the cylindrical portion The radius of the plurality of vertical rib portions 32f from the center of 32 may be made smaller, that is, smaller than the radius of the plurality of high-rigidity portions 32b having a plurality of annular plate shapes.
　筒状部３２は、複数の低剛性部３２ａおよび複数の高剛性部３２ｂの内周面を一体にした円筒状の内周面３２ｉを有しており、この円筒状の内周面３２ｉは、電線１１の外皮１１ｂに密着している。この内周面３２ｉは、止水ブロック１３を形成する止水剤樹脂の硬化時に外皮１１ｂの端部隣接外周面１１ｄに接着されている。 The cylindrical portion 32 has a cylindrical inner peripheral surface 32i in which the inner peripheral surfaces of the plurality of low-rigidity portions 32a and the plurality of high-rigidity portions 32b are integrated, and this cylindrical inner peripheral surface 32i is The wire 11 is in close contact with the outer skin 11b. The inner peripheral surface 32i is bonded to the outer peripheral surface 11d adjacent to the end portion of the outer skin 11b when the water-stopping resin forming the water blocking block 13 is cured.
　ところで、前述のように、端子金具１２の接続部１２ａが車体側の接地接続部にボルト締結されて、端子金具付電線１０が自動車に実装されるとき、あるいは、その後の使用状態において、端子金具１２に対して電線１１の曲げが生じ得る。 By the way, as described above, when the connecting portion 12a of the terminal fitting 12 is bolted to the ground connecting portion on the vehicle body side and the electric wire 10 with terminal fitting is mounted on the automobile, or in a subsequent use state, the terminal fitting. The bending of the electric wire 11 with respect to 12 can occur.
　そして、この電線１１の曲げに伴って筒状部３２が予め設定された曲率半径以下に達するとき、図４に示すように、筒状部３２の複数の高剛性部３２ｂは、それらの周方向の一部で互いに外周部近傍部分３２ｄを軸方向に圧接させるとともに、それら圧接した外周部近傍部分３２ｄを全体として止水部３１に圧接させるようになっている。 And when the cylindrical part 32 reaches below the preset curvature radius with the bending of this electric wire 11, as shown in FIG. 4, the some highly rigid part 32b of the cylindrical part 32 is those circumferential directions. A part of the outer peripheral portion 32d is pressed against each other in the axial direction, and the outer peripheral portion 32d that is press-contacted to the water stop portion 31 as a whole.
　次に、作用について説明する。 Next, the operation will be described.
　上述のように構成された本実施の形態の端子金具付電線１０においては、止水ブロック１３の筒状部３２が複数の低剛性部３２ａを有するので、止水部３１に対し電線１１の曲げ方向や捩り方向で低剛性となって電線１１の外皮１１ｂに追従し易くなる。 In the electric wire with terminal fitting 10 of the present embodiment configured as described above, the cylindrical portion 32 of the water blocking block 13 has a plurality of low-rigidity portions 32a. It becomes low rigidity in the direction and torsional direction, and it becomes easy to follow the outer skin 11b of the electric wire 11.
　したがって、電線１１の曲げや捩りに伴う外皮１１ｂの変形が、止水ブロック１３の止水部３１の端部内周縁部分に集中することなく、筒状部３２との接着面である端部隣接外周面１１ｄの範囲内に分散される。 Therefore, the deformation of the outer skin 11b accompanying the bending or twisting of the electric wire 11 does not concentrate on the inner peripheral edge portion of the end portion of the water stop portion 31 of the water stop block 13, and the outer periphery adjacent to the end portion which is an adhesive surface with the tubular portion 32. Dispersed within the range of the surface 11d.
　よって、止水ブロック１３の止水部３１の端部内周縁部分で電線１１の外皮１１ｂが剥離し難くなるとともに、筒状部３２側から止水部３１の端部内周縁部分側に剥離が進行し難くなり、止水部３１の端部内周縁部分より更に内奥側への剥離の進行が防止される。 Therefore, the outer skin 11b of the electric wire 11 is difficult to peel off at the end inner peripheral edge portion of the water stop portion 31 of the water stop block 13, and peeling progresses from the cylindrical portion 32 side to the end inner peripheral edge portion side of the water stop portion 31. It becomes difficult, and the progress of peeling further to the inner back side than the inner peripheral edge portion of the end portion of the water stop portion 31 is prevented.
　また、筒状部３２の複数の高剛性部３２ｂが外皮１１ｂに密着しており、筒状部３２の端部が高剛性になっているので、筒状部３２の端部内周縁部における剥離が有効に抑制され、筒状部３２の内周面３２ｉと電線１１の外皮１１ｂとの剥離が抑制され、筒状部３２内での良好な止水性が得られる。 In addition, since the plurality of high-rigidity portions 32b of the cylindrical portion 32 are in close contact with the outer skin 11b and the end portion of the cylindrical portion 32 is highly rigid, peeling at the inner peripheral edge of the end portion of the cylindrical portion 32 is prevented. Effectively suppressed, peeling between the inner peripheral surface 32 i of the cylindrical portion 32 and the outer skin 11 b of the electric wire 11 is suppressed, and good water stoppage within the cylindrical portion 32 is obtained.
　さらに、図４に示すように、電線１１の曲げに伴って筒状部３２が予め設定された曲率半径まで小さくなると、複数の高剛性部３２ｂが周方向の一部で互いに圧接するとともに止水部３１に圧接することで、筒状部３２のそれ以上の曲げが有効に抑制される。したがって、電線１１の曲げに伴う外皮１１ｂの大きな変形が止水部３１側に波及することが、有効に抑制される。 Further, as shown in FIG. 4, when the cylindrical portion 32 is reduced to a preset radius of curvature as the electric wire 11 is bent, the plurality of high-rigidity portions 32 b are pressed against each other at a part in the circumferential direction and the water stop By press-contacting the part 31, further bending of the cylindrical part 32 is effectively suppressed. Therefore, the large deformation of the outer skin 11b accompanying the bending of the electric wire 11 is effectively suppressed from spreading to the water stop portion 31 side.
　このように、本実施形態の端子金具付電線１０においては、止水ブロック１３の電線側端部となる筒状部３２の電線１１に対する追従性および密着性を確保することができ、端子金具１２と電線１１との結合部１４を被覆する止水部３１の止水性能を安定確保することのできる端末止水構造となる。 Thus, in the electric wire 10 with a terminal metal fitting of this embodiment, the followable | trackability and the adhesiveness with respect to the electric wire 11 of the cylindrical part 32 used as the electric wire side edge part of the water stop block 13 can be ensured, and the terminal metal fitting 12 is provided. It becomes the terminal water stop structure which can ensure the water stop performance of the water stop part 31 which coat | covers the coupling | bond part 14 with the electric wire 11 stably.
　その結果、自動車のエンジンルーム内でのアース処理が可能になることで、車室内側に引き込んでアース処理する従来に比べると、アース線となる端子金具付電線１０の長さを大幅に短縮できるので、端子金具付電線１０を用いるワイヤハーネスのコストおよび重量を低減させることができる。 As a result, the grounding in the engine room of the automobile can be performed, so that the length of the electric wire 10 with terminal fittings serving as a grounding wire can be greatly reduced as compared with the conventional case where the grounding is performed by pulling into the vehicle interior side. Therefore, the cost and weight of the wire harness using the electric wire 10 with terminal fittings can be reduced.
　（第２の実施の形態）
　図５は、本発明に係る端子金具付電線の端末止水構造の第２の実施の形態を示している。 (Second Embodiment)
FIG. 5 shows a second embodiment of the terminal water stop structure of the electric wire with terminal fitting according to the present invention.
　なお、以下に説明する各実施の形態は、全体の概略構成が前述の第１の実施の形態と類似するものであり、止水ブロック１３の止水部３１から電線１１側に突出する筒状部の形状のみが第１の実施の形態における筒状部３２とは相違するものである。よって、以下の各実施形態の説明においては、第１の実施の形態と類似する構成については図１ないし図４に示した対応する構成要素の符号を用い、相違点についてのみ説明する。 In addition, each embodiment described below has an overall schematic configuration similar to that of the first embodiment described above, and is a cylindrical shape that protrudes from the water stop portion 31 of the water stop block 13 to the electric wire 11 side. Only the shape of the part is different from the cylindrical part 32 in the first embodiment. Therefore, in the following description of each embodiment, the same reference numerals as those in FIGS. 1 to 4 are used for configurations similar to those of the first embodiment, and only differences are described.
　図５に示すように、第２の実施の形態においては、止水ブロック１３が、端子金具１２と電線１１の一方の端部１１ｅとの結合部１４を被覆するとともに外皮１１ｂの端部外周面１１ｃに密着する止水部３１と、その止水部３１から電線１１の外皮１１ｂに沿って筒状に突出する筒状部４２とを有している。 As shown in FIG. 5, in the second embodiment, the water blocking block 13 covers the connecting portion 14 between the terminal fitting 12 and one end portion 11e of the electric wire 11, and the outer peripheral surface of the end portion of the outer cover 11b. It has the water stop part 31 closely_contact | adhered to 11c, and the cylindrical part 42 which protrudes from the water stop part 31 along the outer sheath 11b of the electric wire 11 in the cylinder shape.
　筒状部４２は、止水部３１より横断面積が小さい円環状の複数の低剛性部４２ａと、それぞれ低剛性部４２ａより横断面積が大きく外皮１１ｂに密着する円環板状の複数の高剛性部４２ｂとを、交互に軸方向に隣り合うように連設したものである。 The cylindrical portion 42 includes a plurality of annular low-rigidity portions 42a having a smaller cross-sectional area than the water stop portion 31, and a plurality of annular plate-shaped high-rigidities each having a larger cross-sectional area than the low-rigidity portion 42a and closely contacting the outer skin 11b. The portions 42b are continuously arranged so as to be adjacent to each other in the axial direction.
　そして、筒状部４２の内周面４２ｉは、電線１１の外皮１１ｂの端部隣接外周面１１ｄに密着している。また、複数の高剛性部４２ｂは、外周部がＲ面取りされており、筒状部４２が蛇腹状の外観をなしている。 The inner peripheral surface 42 i of the cylindrical portion 42 is in close contact with the outer peripheral surface 11 d adjacent to the end of the outer skin 11 b of the electric wire 11. In addition, the plurality of high-rigidity parts 42b are rounded at the outer periphery, and the cylindrical part 42 has an accordion-like appearance.
　本実施形態の端子金具付電線１０においても、止水ブロック１３の電線側端部となる筒状部４２の電線１１に対する追従性および密着性を確保することができ、端子金具１２と電線１１との結合部１４を被覆する止水部３１の止水性能を安定確保することのできる端末止水構造となる。 Also in the electric wire 10 with a terminal metal fitting of the present embodiment, it is possible to ensure the followability and adhesion to the electric wire 11 of the tubular portion 42 that is the electric wire side end portion of the water blocking block 13. It becomes the terminal water stop structure which can ensure the water stop performance of the water stop part 31 which coat | covers the connection part 14 of this stably.
　（第３の実施の形態）
　図６は、本発明に係る端子金具付電線の端末止水構造の第３の実施の形態を示している。 (Third embodiment)
FIG. 6 shows a third embodiment of the terminal water stop structure of the electric wire with terminal fitting according to the present invention.
　図６に示すように、第３の実施の形態においては、止水ブロック１３が、端子金具１２と電線１１の一方の端部１１ｅとの結合部１４を被覆するとともに外皮１１ｂの端部外周面１１ｃに密着する止水部３１と、その止水部３１から電線１１の外皮１１ｂに沿って筒状に突出する筒状部５２とを有している。 As shown in FIG. 6, in the third embodiment, the water blocking block 13 covers the connecting portion 14 between the terminal fitting 12 and one end portion 11e of the electric wire 11, and the outer peripheral surface of the end portion of the outer cover 11b. It has the water stop part 31 closely_contact | adhered to 11c, and the cylindrical part 52 which protrudes from the water stop part 31 along the outer sheath 11b of the electric wire 11 in the cylinder shape.
　筒状部５２は、止水部３１より横断面積が小さい円環状の複数の低剛性部５２ａと、それぞれ低剛性部５２ａより横断面積が大きく外皮１１ｂに密着する円環板状の複数の高剛性部５２ｂとを、交互に軸方向に隣り合うように連設したものである。 The cylindrical portion 52 includes a plurality of annular low-rigidity portions 52a having a smaller cross-sectional area than the water stop portion 31, and a plurality of annular plate-shaped high-rigidities each having a larger cross-sectional area than the low-rigidity portion 52a and closely contacting the outer skin 11b. The parts 52b are alternately arranged adjacent to each other in the axial direction.
　そして、筒状部５２の内周面５２ｉは、電線１１の外皮１１ｂの端部隣接外周面１１ｄに密着している。また、複数の高剛性部５２ｂは、外周面が略くの字状の断面形状になるように形成されているか、両端外周部分がＣ面取りされている。 And the inner peripheral surface 52 i of the cylindrical portion 52 is in close contact with the outer peripheral surface 11 d adjacent to the end of the outer skin 11 b of the electric wire 11. The plurality of high-rigidity portions 52b are formed so that the outer peripheral surface has a substantially U-shaped cross-sectional shape, or the outer peripheral portions at both ends are chamfered.
　本実施形態の端子金具付電線１０においても、止水ブロック１３の電線側端部となる筒状部５２の電線１１に対する追従性および密着性を確保することができ、端子金具１２と電線１１との結合部１４を被覆する止水部３１の止水性能を安定確保することのできる端末止水構造となる。 Also in the electric wire 10 with a terminal metal fitting of the present embodiment, it is possible to ensure followability and adhesion to the electric wire 11 of the cylindrical portion 52 that is the electric wire side end portion of the water blocking block 13. It becomes the terminal water stop structure which can ensure the water stop performance of the water stop part 31 which coat | covers the connection part 14 of this stably.
　（第４の実施の形態）
　図７は、本発明に係る端子金具付電線の端末止水構造の第４の実施の形態を示している。 (Fourth embodiment)
FIG. 7 shows a fourth embodiment of a terminal water stop structure for an electric wire with terminal fitting according to the present invention.
　図７に示すように、第４の実施の形態においては、止水ブロック１３が、端子金具１２と電線１１の一方の端部１１ｅとの結合部１４を被覆するとともに外皮１１ｂの端部外周面１１ｃに密着する止水部３１と、その止水部３１から電線１１の外皮１１ｂに沿って筒状に突出する筒状部６２とを有している。 As shown in FIG. 7, in the fourth embodiment, the water blocking block 13 covers the connecting portion 14 between the terminal fitting 12 and one end portion 11e of the electric wire 11, and the outer peripheral surface of the end portion of the outer cover 11b. It has the water stop part 31 closely_contact | adhered to 11c, and the cylindrical part 62 which protrudes from the water stop part 31 along the outer sheath 11b of the electric wire 11 in the cylinder shape.
　筒状部６２は、止水部３１より横断面積が小さい円環状の複数の低剛性部６２ａと、それぞれ低剛性部６２ａより横断面積が大きく外皮１１ｂに密着する円環板状の複数の高剛性部６２ｂとを、交互に軸方向に隣り合うように連設したものである。そして、筒状部６２の内周面６２ｉは、電線１１の外皮１１ｂの端部隣接外周面１１ｄに密着している。 The cylindrical portion 62 includes a plurality of annular low-rigidity portions 62a having a smaller cross-sectional area than the water stop portion 31 and a plurality of annular plate-shaped high-rigidities each having a larger cross-sectional area than the low-rigidity portion 62a and closely contacting the outer skin 11b. The parts 62b are connected in series so as to be alternately adjacent in the axial direction. The inner peripheral surface 62 i of the tubular portion 62 is in close contact with the outer peripheral surface 11 d adjacent to the end of the outer skin 11 b of the electric wire 11.
　また、複数の低剛性部６２ａと複数の高剛性部６２ｂとのうち少なくとも一方、例えば両方は、筒状部６２の軸方向の一端側と他端側とで、電線１１の任意の曲げ方向および捩り方向について剛性が相違するように互いに異なる形状を有している。そして、止水部３１に近い筒状部６２の基端部６２ｃ（一端側）における曲げ剛性および捩り剛性が、止水部３１から離れた先端部６２ｄ（他端側）におけるそれら剛性より高くなっている。 In addition, at least one of the plurality of low-rigidity parts 62a and the plurality of high-rigidity parts 62b, for example, both are one end side and the other end side in the axial direction of the cylindrical part 62, and an arbitrary bending direction of the electric wire 11 and They have different shapes so that the rigidity differs in the torsional direction. And the bending rigidity and the torsional rigidity at the base end part 62c (one end side) of the cylindrical part 62 close to the water stop part 31 are higher than those at the front end part 62d (the other end side) away from the water stop part 31. ing.
　より具体的には、筒状部６２は、止水部３１の図７中の右側の端面から突出する第１の低剛性部６２ａ１と、第１の低剛性部６２ａ１の先端側に一体にかつ同心的に連結された第１の低剛性部６２ａ１より大径の円環板状の第１の高剛性部６２ｂ１とを有している。 More specifically, the cylindrical portion 62 is integrated with the first low-rigidity portion 62a1 protruding from the right end surface of the water stop portion 31 in FIG. 7 and the distal end side of the first low-rigidity portion 62a1. And a first high-rigidity portion 62b1 having an annular plate shape larger in diameter than the first low-rigidity portion 62a1 concentrically connected.
　また、筒状部６２は、第１の高剛性部６２ｂ１の図７中の右側の端面から略環状に突出する、第１の低剛性部６２ａ１より小径の第２の低剛性部６２ａ２と、第２の低剛性部６２ａ２の先端側に一体にかつ同心的に連結された、第２の低剛性部６２ａ２より大径でかつ第１の高剛性部６２ｂ１より小径の円環板状の第２の高剛性部６２ｂ２と、を有している。さらに、筒状部６２は、第２の高剛性部６２ｂ２の図７中の右側の端面から環状に突出する、第２の低剛性部６２ａ２より小径の第３の低剛性部６２ａ３と、第３の低剛性部６２ａ３の先端側に一体にかつ同心的に連結された、第３の低剛性部６２ａ３より大径でかつ第２の高剛性部６２ｂ２より小径の円環板状の第３の高剛性部６２ｂ３と、を有している。 Further, the cylindrical portion 62 has a second low-rigidity portion 62a2 having a smaller diameter than the first low-rigidity portion 62a1 that protrudes from the right end surface of the first high-rigidity portion 62b1 in FIG. A second annular plate-like second member integrally and concentrically connected to the distal end side of the second low-rigidity part 62a2 and having a larger diameter than the second low-rigidity part 62a2 and a smaller diameter than the first high-rigidity part 62b1. And a high-rigidity portion 62b2. Further, the cylindrical portion 62 has a third low-rigidity portion 62a3 having a diameter smaller than that of the second low-rigidity portion 62a2 that protrudes annularly from an end surface on the right side of the second high-rigidity portion 62b2 in FIG. An annular plate-like third high-diameter having a larger diameter than the third low-rigidity portion 62a3 and a smaller diameter than the second high-rigidity portion 62b2, which is integrally and concentrically connected to the distal end side of the low-rigidity portion 62a3. And a rigid portion 62b3.
　なお、複数の高剛性部６２ｂを構成する第１の高剛性部６２ｂ１、第２の高剛性部６２ｂ２および第３の高剛性部６２ｂ３は、筒状部６２の先端側に近付くほど外径が小さくなっているが、同一外径であってもよい。 The first high-rigidity portion 62b1, the second high-rigidity portion 62b2, and the third high-rigidity portion 62b3 constituting the plurality of high-rigidity portions 62b have smaller outer diameters as they approach the distal end side of the cylindrical portion 62. However, they may have the same outer diameter.
　本実施形態の端子金具付電線１０においても、上述の各実施形態と同様に、止水ブロック１３の電線側端部となる筒状部６２の電線１１に対する追従性および密着性を確保することができ、端子金具１２と電線１１との結合部１４を被覆する止水部３１の止水性能を安定確保することのできる端末止水構造となる。 Also in the electric wire 10 with a terminal metal fitting of this embodiment, the followable | trackability and adhesiveness with respect to the electric wire 11 of the cylindrical part 62 used as the electric wire side edge part of the water stop block 13 are ensured similarly to each above-mentioned embodiment. It becomes a terminal water stop structure which can ensure the water stop performance of the water stop part 31 which covers the coupling | bond part 14 of the terminal metal fitting 12 and the electric wire 11 stably.
　しかも、本実施形態では、筒状部６２の先端側に近いほど低剛性となるので、絶縁被覆電線の曲げに伴う外皮の変形が止水部側に波及することが、より有効に抑制される。 In addition, in this embodiment, the closer to the distal end side of the cylindrical portion 62, the lower the rigidity. Therefore, it is more effectively suppressed that the deformation of the outer skin accompanying the bending of the insulation-coated electric wire spreads to the water stop portion side. .
　（第５の実施の形態）
　図８は、本発明に係る端子金具付電線の端末止水構造の第５の実施の形態を示している。 (Fifth embodiment)
FIG. 8 shows a fifth embodiment of the terminal water stop structure of the electric wire with terminal fitting according to the present invention.
　図８に示すように、第５の実施の形態においては、止水ブロック１３が、端子金具１２と電線１１の一方の端部１１ｅとの結合部１４を被覆するとともに外皮１１ｂの端部外周面１１ｃに密着する止水部３１と、その止水部３１から電線１１の外皮１１ｂに沿って筒状に突出する筒状部７２とを有している。 As shown in FIG. 8, in the fifth embodiment, the water blocking block 13 covers the connecting portion 14 between the terminal fitting 12 and one end portion 11e of the electric wire 11, and the outer peripheral surface of the end portion of the outer cover 11b. It has the water stop part 31 closely_contact | adhered to 11c, and the cylindrical part 72 which protrudes from the water stop part 31 along the outer sheath 11b of the electric wire 11 in the cylinder shape.
　筒状部７２は、止水部３１より横断面積が小さい円環状の複数の低剛性部７２ａと、それぞれ低剛性部７２ａより横断面積が大きく外皮１１ｂに密着する円環板状の複数の高剛性部７２ｂとを、交互に軸方向に隣り合うように連設したものである。そして、筒状部７２の内周面７２ｉは、電線１１の外皮１１ｂの端部隣接外周面１１ｄに密着している。 The cylindrical portion 72 includes a plurality of annular low-rigidity portions 72a having a smaller cross-sectional area than the water-stop portion 31, and a plurality of annular plate-shaped high-rigidities each having a larger cross-sectional area than the low-rigidity portion 72a and closely contacting the outer skin 11b. The portions 72b are connected in series so as to be alternately adjacent in the axial direction. And the inner peripheral surface 72i of the cylindrical part 72 is closely_contact | adhered to the edge part adjacent outer peripheral surface 11d of the outer sheath 11b of the electric wire 11. FIG.
　また、複数の低剛性部７２ａと複数の高剛性部７２ｂとのうち少なくとも一方、例えば両方は、筒状部７２の軸方向の一端側と他端側とで、電線１１の任意の曲げ方向および捩り方向について剛性が相違するように互いに異なる形状を有している。 In addition, at least one of the plurality of low-rigidity portions 72a and the plurality of high-rigidity portions 72b, for example, both are at one end side and the other end side in the axial direction of the cylindrical portion 72, and in any bending direction of the electric wire 11 and They have different shapes so that the rigidity differs in the torsional direction.
　そして、止水部３１に近い筒状部７２の基端部７２ｃ（一端側）における曲げ剛性および捩り剛性が、止水部３１から離れた先端部７２ｄ（他端側）におけるそれら剛性より高くなっている。 And the bending rigidity and the torsional rigidity in the base end part 72c (one end side) of the cylindrical part 72 close | similar to the water stop part 31 become higher than those rigidity in the front-end | tip part 72d (other end side) away from the water stop part 31. ing.
　より具体的には、止水部３１の図８中の右側の端面から突出する第１の低剛性部７２ａ１と、第１の低剛性部７２ａ１の先端側に一体にかつ同心的に連結された、第１の低剛性部７２ａ１より大径の円環板状の第１の高剛性部７２ｂ１と、を有している。 More specifically, the first low-rigidity portion 72a1 protruding from the right end surface in FIG. 8 of the water stop portion 31 and the tip end side of the first low-rigidity portion 72a1 are integrally and concentrically connected. And a first high-rigidity portion 72b1 having an annular plate shape having a diameter larger than that of the first low-rigidity portion 72a1.
　また、筒状部７２は、第１の高剛性部７２ｂ１の図８中の右側の端面から略環状に突出する、第１の低剛性部７２ａ１より軸方向長さが大きい第２の低剛性部７２ａ２と、第２の低剛性部７２ａ２の先端側に一体にかつ同心的に連結された、第２の低剛性部７２ａ２より大径でかつ第１の高剛性部７２ｂ１より軸方向長さが小さい円環板状の第２の高剛性部７２ｂ２と、を有している。さらに、筒状部７２は、第２の高剛性部７２ｂ２の図８中の右側の端面から環状に突出する、第２の低剛性部７２ａ２より軸方向長さが大きい第３の低剛性部７２ａ３と、第３の低剛性部７２ａ３の先端側に一体にかつ同心的に連結された、第３の低剛性部７２ａ３より大径でかつ第２の高剛性部７２ｂ２より軸方向長さが小さい円環板状の第３の高剛性部７２ｂ３と、を有している。 Further, the cylindrical portion 72 is a second low-rigidity portion having a larger axial length than the first low-rigidity portion 72a1 that protrudes from the right end surface of the first high-rigidity portion 72b1 in FIG. 72a2 and the second low-rigidity portion 72a2 are integrally and concentrically connected to the distal end side of the second low-rigidity portion 72a2, and have a larger diameter than the second low-rigidity portion 72a2 and a smaller axial length than the first high-rigidity portion 72b1. An annular plate-like second high-rigidity portion 72b2. Further, the cylindrical portion 72 is annularly projected from the right end surface of the second high-rigidity portion 72b2 in FIG. 8, and has a third low-rigidity portion 72a3 having a larger axial length than the second low-rigidity portion 72a2. And a circle that is integrally and concentrically connected to the distal end side of the third low-rigidity portion 72a3 and has a larger diameter than the third low-rigidity portion 72a3 and a smaller axial length than the second high-rigidity portion 72b2. An annular plate-like third high-rigidity portion 72b3.
　なお、複数の高剛性部７２ｂを構成する第１の高剛性部７２ｂ１、第２の高剛性部７２ｂ２および第３の高剛性部７２ｂ３は、筒状部７２の先端側に近付くほど軸方向長さが小さく（薄く）なっているが、同一の軸方向長さ（厚さ）であってもよい。 The first high-rigidity portion 72b1, the second high-rigidity portion 72b2, and the third high-rigidity portion 72b3 constituting the plurality of high-rigidity portions 72b are axially longer as they approach the distal end side of the cylindrical portion 72. Is small (thin), but may have the same axial length (thickness).
　本実施形態の端子金具付電線１０においても、上述の各実施形態と同様に、止水ブロック１３の電線側端部となる筒状部７２の電線１１に対する追従性および密着性を確保することができ、端子金具１２と電線１１との結合部１４を被覆する止水部３１の止水性能を安定確保することのできる端末止水構造となる。 Also in the electric wire 10 with a terminal metal fitting of this embodiment, the followable | trackability and the adhesiveness with respect to the electric wire 11 of the cylindrical part 72 used as the electric wire side edge part of the water stop block 13 are ensured like the above-mentioned each embodiment. It becomes a terminal water stop structure which can ensure the water stop performance of the water stop part 31 which covers the coupling | bond part 14 of the terminal metal fitting 12 and the electric wire 11 stably.
　しかも、本実施形態では、筒状部７２の先端側に近いほど低剛性（低曲げ剛性の曲げ角度範囲が大）となるので、絶縁被覆電線の曲げに伴う外皮の変形が止水部側に波及することが、より有効に抑制される。 In addition, in the present embodiment, the closer to the distal end side of the cylindrical portion 72, the lower the rigidity (the bending angle range of the low bending rigidity is larger), so that the deformation of the outer skin due to the bending of the insulation-coated electric wire is on the water stop portion side. Ripple is more effectively suppressed.
　なお、上述の各実施の形態では、止水部３１より筒状部３２の軸方向長さを小さく図示していたが、止水部３１より軸方向長さが大きくなっていてもよい。また、筒状部３２、４２、５２、６２、７２を円形断面にする場合で図示したが、外周面が非円形、例えば多角形であってもよい。複数の低剛性部３２ａ、４２ａ、５２ａ、６２ａ、７２ａおよび複数の高剛性部３２ｂ、４２ｂ、５２ｂ、６２ｂ、７２ｂの数が２以上の任意の数であることはいうまでもない。 In the above-described embodiments, the axial length of the cylindrical portion 32 is smaller than that of the water stop portion 31, but the axial length may be larger than that of the water stop portion 31. Further, although the cylindrical portions 32, 42, 52, 62, and 72 are illustrated as having a circular cross section, the outer peripheral surface may be non-circular, for example, a polygon. It goes without saying that the number of the plurality of low- rigidity portions 32a, 42a, 52a, 62a, 72a and the plurality of high- rigidity portions 32b, 42b, 52b, 62b, 72b is an arbitrary number of two or more.
　また、上述の各実施の形態では、端子金具１２が電線１１の端部１１ｅに圧着結合されるものとしたが、超音波溶接等によって電気的接続および機械的結合を達成してもよいことはいうまでもなく、絶縁樹脂バレル部１２ｄを省略してワイヤバレル部１２ｃを長くしたような端子金具であってもよいことも勿論である。 Further, in each of the above-described embodiments, the terminal fitting 12 is crimped to the end portion 11e of the electric wire 11. However, it is possible to achieve electrical connection and mechanical coupling by ultrasonic welding or the like. Needless to say, a terminal fitting in which the insulating resin barrel portion 12d is omitted and the wire barrel portion 12c is elongated may be used.
　さらに、止水ブロック１３を形成する止水剤樹脂の性状、特に硬化後の硬度やゴム弾性等が被覆の硬さや厚さ等に応じて適宜設定され得ることも勿論である。 Further, it is needless to say that the properties of the water-stopping resin forming the water-stopping block 13, particularly the hardness after curing and rubber elasticity, etc. can be appropriately set according to the hardness and thickness of the coating.
　以上説明したように、本発明は、止水ブロックの電線側端部の電線に対する追従性および密着性を確保するとともに、端子金具と絶縁被覆電線との結合部を被覆し止水する止水部の止水性能を安定確保することのできる端子金具付電線の端末止水構造を提供することができるものである。かかる本発明は、端子が装着された端末部に樹脂製の止水ブロックを備えた端子金具付電線の端末止水構造全般に有用である。 As described above, the present invention ensures the followability and adhesion to the electric wire at the electric wire side end of the water blocking block, and covers the joint between the terminal fitting and the insulated coated electric wire to stop the water. The terminal water stop structure of the electric wire with a terminal metal fitting which can ensure the water stop performance of this stably can be provided. The present invention is useful for the entire terminal water stop structure of an electric wire with a terminal fitting provided with a water stop block made of resin at a terminal portion to which a terminal is attached.
　１０　端子金具付電線
　１１　電線（絶縁被覆電線）
　１１ａ　芯線部
　１１ｂ　外皮（絶縁樹脂）
　１１ｃ　端部外周面
　１１ｄ　端部隣接外周面（端部に隣接する外周面）
　１１ｅ　端部
　１２　端子金具
　１２ａ　接続部
　１２ｂ　突起
　１２ｃ　ワイヤバレル部
　１２ｄ　絶縁樹脂バレル部
　１３　止水ブロック
　１４　結合部
　３１　止水部
　３１ａ　外周面
　３２、４２、５２、６２、７２　筒状部
　３２ａ、４２ａ、５２ａ、６２ａ、７２ａ　複数の低剛性部
　３２ｂ、４２ｂ、５２ｂ、６２ｂ、７２ｂ　複数の高剛性部
　３２ｅ　円環状部分
　３２ｆ　縦リブ部分
　３２ｉ、４２ｉ、５２ｉ、６２ｉ、７２ｉ　内周面
　３２ａ１、６２ａ１、７２ａ１　第１の低剛性部
　３２ａ２、６２ａ２、７２ａ２　第２の低剛性部
　３２ａ３、６２ａ３、７２ａ３　第３の低剛性部
　３２ｂ１、６２ｂ１、７２ｂ１　第１の高剛性部
　３２ｂ２、６２ｂ２、７２ｂ２　第２の高剛性部
　３２ｂ３、６２ｂ３、７２ｂ３　第３の高剛性部
　３３ｄ　外周部近傍部分（周後方の一部）
　６２ｃ、７２ｃ　基端部（一端側）
　６２ｄ、７２ｄ　先端部（他端側）
  10 Electric wire with terminal bracket 11 Electric wire (insulated coated electric wire)
11a Core wire part 11b Outer skin (insulating resin)
11c End outer peripheral surface 11d End adjacent outer peripheral surface (outer peripheral surface adjacent to the end)
11e End portion 12 Terminal fitting 12a Connection portion 12b Protrusion 12c Wire barrel portion 12d Insulating resin barrel portion 13 Water stop block 14 Coupling portion 31 Water stop portion 31a Outer peripheral surface 32, 42, 52, 62, 72 Cylindrical portions 32a, 42a, 52a, 62a, 72a Multiple low- rigidity portions 32b, 42b, 52b, 62b, 72b Multiple high-rigidity portions 32e Annular portion 32f Vertical rib portion 32i, 42i, 52i, 62i, 72i Inner peripheral surface 32a1, 62a1, 72a1 First 1 low-rigidity portion 32a2, 62a2, 72a2 second low-rigidity portion 32a3, 62a3, 72a3 third low-rigidity portion 32b1, 62b1, 72b1 first high-rigidity portion 32b2, 62b2, 72b2 second high-rigidity portion 32b3 , 62b3, 72b3 Third high-rigidity portion 33d Peripheral portion vicinity portion (a part at the rear of the periphery)
62c, 72c Base end (one end side)
62d, 72d Tip (other end side)

Claims (2)

  1. 　電気接続用の端子金具に結合される絶縁被覆電線の端部を被覆する樹脂製の止水ブロックを備えた端子金具付電線の端末止水構造であって、
    　前記止水ブロックは、前記端子金具および前記絶縁被覆電線の端部の結合部を被覆するとともに前記絶縁被覆電線の外皮の端部外周面に密着する止水部と、該止水部から前記絶縁被覆電線の前記外皮に沿って筒状に突出する筒状部とを有しており、
    　前記筒状部は、前記止水部より横断面積が小さい複数の低剛性部と、それぞれ前記低剛性部より横断面積が大きく前記外皮に密着する複数の高剛性部とを、交互に軸方向に隣り合うよう連設してなり、
    　前記絶縁被覆電線の曲げに伴って前記筒状部が予め設定された曲率半径以下に達するとき、前記複数の高剛性部が、周方向の一部で互いに圧接するとともに前記止水部に圧接することを特徴とする端子金具付電線の端末止水構造。     It is a terminal water stop structure of an electric wire with a terminal metal fitting provided with a resin water stop block that covers an end portion of an insulated coated electric wire coupled to a terminal metal fitting for electrical connection,
    The water blocking block includes a water stopping portion that covers a joint portion between the terminal fitting and the end portion of the insulation-coated electric wire and is in close contact with an outer peripheral surface of an end portion of the outer sheath of the insulation-coated electric wire, and the insulation from the water stopping portion. A cylindrical portion protruding in a cylindrical shape along the outer skin of the covered electric wire,
    The cylindrical portion alternately includes a plurality of low-rigidity portions having a smaller cross-sectional area than the water stop portion and a plurality of high-rigidity portions each having a larger cross-sectional area than the low-rigidity portion and closely contacting the outer skin in the axial direction. It is connected to be adjacent,
    When the tubular portion reaches a predetermined radius of curvature or less as the insulation-coated electric wire is bent, the plurality of high-rigidity portions are in pressure contact with each other in part in the circumferential direction and in pressure contact with the water stop portion. The terminal water stop structure of the electric wire with a terminal metal fitting characterized by the above-mentioned.
  2. 　前記複数の低剛性部と前記複数の高剛性部とのうち少なくとも一方は、前記筒状部の前記軸方向の一端側と他端側とで、前記絶縁被覆電線の任意の曲げ方向および捩り方向についての剛性が相違するように互いに異なる形状を有しており、
    　前記止水部に近い前記筒状部の前記一端側における前記剛性が、前記止水部に近い前記筒状部の前記他端側における前記剛性より高くなっていることを特徴とする請求項１に記載の端子金具付電線の端末止水構造。
          At least one of the plurality of low-rigidity portions and the plurality of high-rigidity portions is at one end side and the other end side in the axial direction of the cylindrical portion, and in an arbitrary bending direction and twisting direction of the insulation-coated electric wire Have different shapes so that the rigidity about
    2. The rigidity at the one end side of the cylindrical portion close to the water stop portion is higher than the rigidity at the other end side of the cylindrical portion close to the water stop portion. The terminal water stop structure of the electric wire with a terminal metal fitting of description.
PCT/JP2015/084963 2014-12-18 2015-12-14 Terminal waterproofing structure of electric cable with terminal fitting WO2016098734A1 (en)

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CN113366588A (en) * 2019-01-30 2021-09-07 株式会社自动网络技术研究所 Insulated wire and wire harness
US20230146742A1 (en) * 2020-03-30 2023-05-11 Sumitomo Wiring Systems, Ltd. Wire harness

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JP6825495B2 (en) * 2017-06-16 2021-02-03 株式会社オートネットワーク技術研究所 Wires with terminals and wire harnesses
DE112020000594T5 (en) 2019-01-30 2021-12-23 Autonetworks Technologies, Ltd. Insulated electrical wire and wiring
JP7226456B2 (en) 2019-01-30 2023-02-21 株式会社オートネットワーク技術研究所 Insulated wire, wire harness, method for manufacturing insulated wire
WO2020157867A1 (en) 2019-01-30 2020-08-06 株式会社オートネットワーク技術研究所 Insulated electrical wire and wire harness
JP2023022893A (en) * 2021-08-04 2023-02-16 株式会社オートネットワーク技術研究所 terminal

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JPS6039581U (en) * 1983-08-26 1985-03-19 アイワ株式会社 plug
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CN113366588A (en) * 2019-01-30 2021-09-07 株式会社自动网络技术研究所 Insulated wire and wire harness
CN113366588B (en) * 2019-01-30 2023-01-10 株式会社自动网络技术研究所 Insulated wire and wire harness
US20230146742A1 (en) * 2020-03-30 2023-05-11 Sumitomo Wiring Systems, Ltd. Wire harness
US12087475B2 (en) * 2020-03-30 2024-09-10 Sumitomo Wiring Systems, Ltd. Wire harness with waterproofed shield

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