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WO2018168415A1 - Câble à embout - Google Patents

Câble à embout Download PDF

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Publication number
WO2018168415A1
WO2018168415A1 PCT/JP2018/006944 JP2018006944W WO2018168415A1 WO 2018168415 A1 WO2018168415 A1 WO 2018168415A1 JP 2018006944 W JP2018006944 W JP 2018006944W WO 2018168415 A1 WO2018168415 A1 WO 2018168415A1
Authority
WO
WIPO (PCT)
Prior art keywords
cap
spacer
electric wire
heat
wire
Prior art date
Application number
PCT/JP2018/006944
Other languages
English (en)
Japanese (ja)
Inventor
宏介 蓮井
須藤　博
松藤　茂雄
幸康 坂本
佑樹 矢部
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Publication of WO2018168415A1 publication Critical patent/WO2018168415A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/56—Insulating bodies
    • 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
    • H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the 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
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
    • 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
    • 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
    • H02G15/00—Cable fittings
    • H02G15/02—Cable terminations
    • H02G15/04—Cable-end sealings

Definitions

  • This invention relates to a technique for inserting an electric wire into a heat-shrink cap and bringing them into close contact.
  • Patent Document 1 a hot-melt adhesive is provided on the inner wall of a heat-shrinkable tube, and one end is first heat-shrinked and sealed to form a heat-shrinkable cap.
  • a method is disclosed in which the exposed core portion of the electric wire is sealed by heat shrinking the remaining portion of the cap.
  • Patent Document 2 discloses a method of sealing an exposed core portion of an electric wire using a heat shrink cap.
  • an object of the present invention is to provide a technique for improving the adhesion between an electric wire and a heat shrink cap after heat shrink.
  • an electric wire with a cap includes an electric wire, a spacer attached around a covering portion of the electric wire, and an adhesive containing a thermoplastic resin provided on an inner surface, and one end portion.
  • a heat-shrinkable cap that is covered with the exposed core portion of the electric wire and the spacer, and the heat-shrinkable cap is heat-shrinked.
  • the radial dimension of the heat shrink cap in the portion where the spacer is attached along the extending direction of the electric wire is the radial dimension of the heat shrink cap in the portion where the spacer is not attached. Bigger than.
  • the electric wire with a cap according to the second aspect is an electric wire with a cap according to the first aspect, and the spacer has a cylindrical shape through which the electric wire can be inserted and connected to the entire circumferential direction.
  • the electric wire with a cap according to the third aspect is an electric wire with a cap according to the second aspect, and the spacer is provided along the circumferential direction of the outer peripheral surface at a position where the heat shrink cap is covered. It has at least one convex part.
  • the capped electric wire according to a fourth aspect is a capped electric wire according to the third aspect, wherein the at least one convex part is a plurality of convex parts, and the spacer is between adjacent convex parts.
  • a groove is provided along the circumferential direction.
  • the electric wire with a cap according to a fifth aspect is an electric wire with a cap according to the first aspect, wherein the spacer is capable of inserting the electric wire inside thereof, and is partially axially in the axial direction. It is a substantially cylindrical shape having a slit extending along.
  • the electric wire with a cap according to a sixth aspect is an electric wire with a cap according to any one of the first to fifth aspects, wherein the one end of the heat-shrinkable cap is inside the heat-shrinkable cap that is heat-shrinked.
  • the adhesive is filled in the region from the portion to the portion where the spacer is attached, and there is a gap in the region from the portion where the spacer is attached to the other end portion of the heat shrink cap.
  • the radial dimension of the heat shrink cap in the portion where the spacer is attached along the extending direction of the electric wire is It is larger than the dimension in the radial direction of the heat shrinkable cap in the part that is not.
  • the heat shrink cap is pressed more strongly against the portion where the spacer is attached and the radial dimension is larger than the portion where the spacer is not attached. As a result, adhesion through the spacer between the electric wire and the heat shrink cap after heat shrink is improved.
  • the spacer has a cylindrical shape through which an electric wire can be inserted and which is connected to the entire circumferential direction.
  • the heat shrinkable cap after heat-shrinking has a shape that follows the convex portion, and the heat-shrinkable cap is unlikely to come off from the electric wire and the spacer.
  • At least one convex portion is a plurality of convex portions, and the spacer has a groove along the circumferential direction between adjacent convex portions.
  • the spacer has a substantially cylindrical shape through which an electric wire can be inserted and which has a slit extending along the axial direction in a part of the circumferential direction. For this reason, an electric wire can be inserted in the inside of a spacer from this slit in the state before heat contraction. Further, the spacer can be deformed so as to change the interval of the slits along the circumferential direction according to the number and thickness of the electric wires inserted into the spacer. As a result, adhesion through the spacer between the electric wire and the heat shrink cap after heat shrink is improved.
  • the region from one end of the heat-shrink cap to the portion to which the spacer is attached is filled with the adhesive, and heat is applied from the portion to which the spacer is attached.
  • FIG. 1 is an exploded perspective view showing components of the electric wire 1 with a cap.
  • FIG. 2 is a cross-sectional view showing the heat shrinkable cap 10.
  • the heat shrink cap 10 is put on the electric wire 40 and the spacer 60.
  • the heat shrink cap 10 includes a cap main body 20 and an adhesive 30.
  • the cap main body 20 is formed in a closed tubular shape in which one end 21 is closed and the other end 22 is open. Moreover, after covering the electric wire 40 and the spacer 60, at least the other end part 22 of the cap main body part 20 can be thermally contracted. Specifically, here, the cap main body portion 20 includes an exterior portion 23 and a plug portion 28.
  • the exterior portion 23 is formed in a shape having a small diameter portion 24 and a large diameter portion 25 connected to the small diameter portion 24 from the one end portion 21 toward the other end portion 22 using a heat shrinkable tube having both ends opened as a material. At least the large-diameter portion 25 of the exterior portion 23 is in a state capable of being thermally contracted after being covered with the electric wire 40 and the spacer 60. That is, the large diameter portion 25 is in a state capable of being thermally contracted in a state where the heat shrink cap 10 is present alone.
  • the exterior portion 23 is formed of a heat shrinkable tube having both ends open and a uniform diameter.
  • a heat-shrinkable tube a tube in which an adhesive layer is not previously provided on the inner surface is used.
  • the exterior portion 23 is formed by thermally shrinking the one end portion 21 of the heat shrinkable tube so as to have a smaller diameter than the other end portion 22 to form the small diameter portion 24.
  • the exterior part 23 can be formed by heat-shrinking only the one end part 21 of the heat-shrinkable tube.
  • the small diameter portion 24 is formed so that the heat shrinkage is completely completed and is not further heat shrunk.
  • the small diameter portion 24 is formed so as to be heat shrinkable by subsequent heating. Good.
  • the large-diameter portion 25 includes a first large-diameter portion 26 that continues to the small-diameter portion 24 and gradually increases in diameter, and a second large-diameter portion 27 that continues to the first large-diameter portion 26 and is uniform in the axial direction.
  • the first large-diameter portion 26 is a portion that is not contracted as much as the small-diameter portion 24 but is thermally contracted by the transfer of heat when the small-diameter portion 24 is thermally contracted.
  • the exterior portion 23 is not essential to form the exterior portion 23 by thermally shrinking the one end portion 21 of the heat shrinkable tube to form the small diameter portion 24.
  • the exterior portion 23 is expanded so that the other end portion 22 side has a larger diameter than the one end portion 21 side.
  • a shape having a large-diameter portion 25 may be used.
  • the plug portion 28 is a portion that is provided on the inner surface of the small diameter portion 24 and blocks the opening of the one end portion 21 of the exterior portion 23.
  • the plug portion 28 is formed of the same material as the adhesive 30.
  • the plug portion 28 is also provided when the adhesive 30 is provided on the cap body portion 20.
  • the adhesive 30 is a member that flows and fills the gap in the heat shrink cap 10 by heating for heat shrinking the heat shrink cap 10. For this reason, the adhesive 30 is comprised with the material (for example, hot-melt-adhesive) containing a thermoplastic resin.
  • the material for example, hot-melt-adhesive
  • the adhesive 30 will be described as being retrofitted to the exterior portion 23 together with the plug portion 28 and heat shrinking one end portion 21 of the heat shrinkable tube to form a small diameter portion 24.
  • the adhesive 30 and the plug 28 are formed by applying a hot melt adhesive softened by heating to the inner surface of the exterior 23.
  • FIG. 3 is a schematic cross-sectional view showing a state where the electric wire 40 to which the spacer 60 is attached is inserted into the heat shrink cap 10.
  • FIG. 4 is a schematic cross-sectional view showing the capped electric wire 1.
  • FIG. 3 shows a cross-sectional view of each part at this point.
  • Each covered electric wire 42 includes a core wire 43 and a covered portion 46 that covers the core wire 43.
  • the core wire 43 is formed of a conductive material such as copper, copper alloy, aluminum, or aluminum alloy.
  • the core wire 43 is composed of one or more strands.
  • the types of the core wires 43 of the respective covered electric wires 42 may be the same or different.
  • the covered electric wire 42 a description will be given on the assumption that a copper electric wire in which the core wire 43 is formed of copper or a copper alloy and an aluminum electric wire in which the core wire 43 is formed of aluminum or an aluminum alloy coexist.
  • the covering portion 46 is formed by extruding an insulating material such as a resin around the core wire 43.
  • the end portion of each covered electric wire 42 is an exposed core wire portion 44 in which the covered portion 46 is peeled off and the core wire 43 is exposed. At least a part of the exposed core wire portion 44 is formed with a joint portion 45 in which the core wires 43 are joined together.
  • the core wires 43 are joined to each other by welding such as resistance welding or ultrasonic welding, terminal crimping, or soldering, for example.
  • a spacer 60 is attached around the covering portion 46 of the electric wire 40.
  • the spacer 60 includes a cylindrical tube portion 61 and two convex portions 62 provided along the circumferential direction of the outer peripheral surface of the tube portion 61.
  • the two convex portions 62 are provided apart along the axial direction of the spacer 60. Therefore, a groove 63 is provided between two adjacent convex portions 62 along the circumferential direction of the outer peripheral surface of the cylindrical portion 61. Further, the two convex portions 62 have the same shape, and are tapered from the base end side (tube portion 61 side) toward the tip end side. Therefore, annular edge portions 620 are respectively formed at the tip portions of the two convex portions 62.
  • the spacer 60 is formed of a material (for example, a metal such as copper, a heat-resistant resin, a heat-resistant rubber, etc.) that does not deform even when the temperature becomes high during the heating process described later.
  • a material for example, a metal such as copper, a heat-resistant resin, a heat-resistant rubber, etc.
  • description will be made assuming that the above-described cylindrical portion 61 and the two convex portions 62 are integrally formed using a heat-resistant resin as a material, and the spacer 60 is formed.
  • the inner diameter of the spacer 60 is formed substantially the same as the outer diameter of the covering portion 46 of the electric wire 40.
  • the lower limit value of the inner diameter of the spacer 60 is a dimension that allows the covering portion 46 of the electric wire 40 to be inserted into the spacer 60.
  • the upper limit value of the inner diameter of the spacer 60 is a dimension that can be fixed to the inserted electric wire 40 and that the adhesive 30 does not overflow from between the electric wire 40 in the heating step described later.
  • the upper limit value and the lower limit value are set in consideration of the elastic deformation amount.
  • the tip end side of the electric wire 40 along the axial direction of the cylindrical portion 61 (the side where the joining portion 45 is provided and tapered) is inside the spacer 60. Inserted into.
  • the electric wire 40 is moved relative to the spacer 60 along the axial direction until the spacer 60 is positioned around the covering portion 46 of the electric wire 40.
  • the plurality of covered electric wires 42 constituting the electric wires 40 are tightened by the spacers 60 and concentrated toward their central axes. As a result, the diameter dimension of the electric wire 40 becomes small and the relative movement becomes possible.
  • the plurality of covered electric wires 42 constituting the electric wire 40 tries to return to a state in which the electric wires 40 are slightly dispersed.
  • the outer peripheral surface of the covering portion 46 of the electric wire 40 and the inner peripheral surface of the spacer 60 are pressed against each other. It is fixed with respect to the part 46.
  • the heat shrink cap 10 is put on the electric wire 40 on which the spacer 60 is mounted.
  • the tip of the joint portion 45 is brought into contact with the plug portion 28 in the heat shrink cap 10, and the electric wire 40 is positioned with respect to the heat shrink cap 10 in the illustrated vertical direction.
  • this state is referred to as a wearing state.
  • the outer peripheral surface of the spacer 60 is in contact with the inner peripheral surface of the heat shrink cap 10 while the tip of the joint portion 45 is not in contact with the plug portion 28 in the heat shrink cap 10.
  • the electric wire 40 may be positioned with respect to the heat shrink cap 10.
  • the electric wire 40 in the mounted state, is indirectly supported on the inner wall of the heat shrink cap 10 via the spacer 60 provided around the electric wire 40. That is, the portion of the electric wire 40 to which the spacer 60 is attached is spaced a certain distance (ie, a distance based on the radial dimension of the spacer 60) from the inner wall of the heat shrink cap 10 in the entire circumferential direction.
  • the electric wire 40 is positioned by the tip of the joining portion 45 abutting against the plug portion 28 in the heat shrinkable cap 10 in the extending direction, and the spacer in the two directions orthogonal to the extending direction. Positioned by being supported on the inner wall of the heat shrink cap 10 via 60.
  • the spacer 60 compared with the case where the spacer 60 is not provided and the electric wire 40 is directly supported by the inner wall of the heat shrink cap 10 (that is, the case where the distance is not provided), It is difficult for the electric wire 40 to be eccentric with respect to the cap 10. Further, even if the electric wire 40 is inclined with respect to the heat shrink cap 10, the inclination is suppressed by the presence of the spacer 60, and the covering portion 46 of the electric wire 40 contacts the edge portion of the other end portion 22 of the heat shrink cap 10. It is hard to do.
  • At least one of the heat shrink cap 10 and the electric wire 40 may be held by a jig or the like (not shown).
  • the heat shrink cap 10 and the electric wire 40 are positioned, the heat shrink cap 10 is heated by the heating mechanism 80. As a result, the large diameter portion 25 of the heat shrink cap 10 is contracted and the adhesive 30 flows. Then, the periphery of the exposed core portion 44 and the covering portion 46 is filled with the fluidized adhesive 30.
  • the adhesive 30 is provided on the inner surface of the cap main body 20 along the axial direction from the first part P1 to the second part P2.
  • part P1 is a site
  • part P2 is a site
  • the part P3 where the spacer 60 is provided is located on the other end 22 side of the center position between the one end 21 and the other end 22, for example.
  • the spacer 60 is formed such that the outer diameter of the edge portion 620, which is the portion having the largest radial dimension, is the same as or smaller than the inner diameter of the cap body portion 20 of the heat shrink cap 10.
  • the heat shrink cap 10 When the heating is completed, the heat shrink cap 10 is sufficiently contracted, and the heat shrink cap 10 is in close contact with the electric wire 40 through the adhesive 30. Thereafter, the fluidized adhesive 30 is solidified by cooling, and the capped wire 1 shown in FIG. 4 is completed.
  • the capped electric wire 1 includes an electric wire 40, a spacer 60 attached around the covering portion 46 of the electric wire 40, and the heat shrink cap 10 covered on the exposed core portion 44 and the spacer 60 of the electric wire 40.
  • the dimension of the radial direction of the heat contraction cap in the part 70 to which the spacer 60 was attached along the extending direction of the electric wire 40 in the state where the heat contraction cap 10 was thermally contracted Is larger than the radial dimension of the heat shrinkable cap 10 in the part to which the heat shrink cap 10 is not attached (that is, the part 71 at the one end 21 and the part 72 at the other end 22 from the part 70).
  • the posture of the electric wire 40 in the heat shrink cap 10 can be improved, and the eccentricity of the electric wire 40 with respect to the heat shrink cap 10 can be suppressed.
  • the spacer 60 is not provided (that is, when the eccentricity of the electric wire 40 with respect to the heat shrink cap 10 is large), the flow of the adhesive 30 in the heat shrink cap 10 becomes uneven during the heating process. Thereby, in the electric wire 1 with a cap, the location where the adhesive 30 passes and the location where the adhesive 30 does not exist exist around the electric wire 40, and the adhesiveness between the electric wire 40 and the heat shrink cap 10 after heat shrinkage decreases. To do.
  • the portion of the electric wire 40 to which the spacer 60 is attached has a certain distance from the inner wall of the heat shrink cap 10 in the entire circumferential direction. Positioned to open.
  • the adhesive 30 tends to flow uniformly around the electric wire 40 at the time of heat shrinkage, and the adhesion between the electric wire 40 and the heat shrink cap 10 after heat shrinkage is improved.
  • the water stoppage of the electric wire 1 with a cap is improved.
  • the adhesive 30 uniformly flows around the electric wire 40 during heat shrinkage, so that the exposed core wire portion 44 is prevented from breaking through the heat shrink cap 10.
  • the heat shrink cap 10 is pressed more strongly than the portions 71 and 72 where the spacer 60 is not attached to the portion 70 where the spacer 60 is attached and the radial dimension is large. As a result, the adhesiveness of the electric wire 40 and the heat shrink cap 10 after the heat shrink via the spacer 60 is improved.
  • the spacer 60 has a cylindrical shape in which the electric wire 40 can be inserted and connected to the entire circumferential direction. By using such a spacer 60, the eccentricity of the electric wire 40 with respect to the heat shrink cap 10 can be effectively suppressed.
  • the spacer 60 has two convex portions 62 provided along the circumferential direction of the outer peripheral surface at a position where the heat shrink cap 10 is put. Therefore, the heat-shrinkable cap 10 after heat-shrinking has a shape that follows the two convex portions 62, and the heat-shrinkable cap 10 is unlikely to be detached from the electric wire 40 and the spacer 60.
  • the number of convex portions 62 may be one or three or more. If the spacer 60 has at least one protrusion 62, the same effect can be obtained.
  • the spacer 60 has two convex portions 62, and the spacer 60 has a groove 63 along the circumferential direction between the adjacent convex portions 62.
  • the hot melt adhesive similar to the adhesive 30 may be filled in the groove 63 in the stage before the heating process.
  • the adhesive filled in the groove 63 contributes to the adhesion between the heat shrink cap 10 and the spacer 60 in the heating step, like the adhesive 30.
  • the number of the convex portions 62 may be three. If the spacer 60 has a plurality of convex portions 62, a groove 63 is formed between the adjacent convex portions 62, and the same effect is obtained.
  • the spacer 60 is located inside the heat-shrinkable cap 10 that has been heat-shrinked. Then, in the heat shrink cap 10, a region 710 from one end 21 of the heat shrink cap 10 to the portion 70 to which the spacer 60 is attached is filled with the adhesive 30, and from the portion 70 to which the spacer 60 is attached. There is a gap in the region 720 to the other end 22 of the heat shrink cap 10. Therefore, the adhesive 30 can be mainly filled in a portion that needs to be bonded (that is, the one end portion 21 side in the heat shrink cap heat shrink cap 10 where the exposed core portion 44 is disposed).
  • FIG. 5 is a schematic cross-sectional view showing a state where the electric wire 40 to which the spacer 60a is attached is inserted into the heat shrink cap 10a.
  • FIG. 6 is a schematic cross-sectional view showing the capped electric wire 1a.
  • the heat-shrinkable cap 10a before the heating step has a cap body part 20 and an adhesive 30a provided on the inner surface of the cap body part 20.
  • This adhesive 30a is a hot-melt adhesive similar to the adhesive 30, and in the mounted state before the heating step, from the first part P1 to the second part along the axial direction on the inner surface of the cap body part 20. It is provided in the part up to P2a.
  • the second part P2a is a part corresponding to the other end 22. That is, the second part P2a is a part on the other end 22 side along the axial direction than the part P3 where the spacer 60 is provided in the mounted state.
  • the spacer 60a has a cylindrical tube portion 61a and two convex portions 62a provided along the circumferential direction of the outer peripheral surface of the tube portion 61a.
  • the two convex portions 62 a are provided to be separated along the axial direction of the spacer 60. Therefore, a groove 63 is provided between two adjacent convex portions 62 a along the circumferential direction of the outer peripheral surface of the cylindrical portion 61.
  • the two convex portions 62a have the same shape, and are tapered from the proximal end side where the cylindrical portion 61a is provided toward the distal end side. Therefore, annular edge portions 620a are respectively formed at the tip portions of the two convex portions 62a.
  • the inner diameter of the spacer 60a (that is, the inner diameter of the cylinder portion 61a) is the same as or larger than the outer diameter of the covering portion 46 of the electric wire 40, as in the above embodiment.
  • the spacer 60a is an adhesive in which the outer diameter of the edge portion 620a, which is the portion having the largest radial dimension, is provided in the cap main body portion 20 of the heat shrinkable cap 10a at the portion P3 where the spacer 60 is provided in the mounted state. It is formed to be equal to or smaller than the inner diameter of 30a.
  • the region 710a from the one end portion 21 of the heat-shrinkable cap 10a to the portion 70a to which the spacer 60a is attached, and the spacer Both the region 720a from the attached portion 70a of 60a to the other end 22 of the heat shrink cap 10a is filled with the adhesive 30.
  • the adhesion between the heat shrink cap 10 and the electric wire 40 via the adhesive 30 is improved.
  • FIG. 7 is a schematic cross-sectional view showing a state where the electric wire 40 to which the spacer 60 is attached is inserted into the heat shrink cap 10b.
  • FIG. 8 is a schematic cross-sectional view showing the capped electric wire 1b.
  • the heat-shrinkable cap 10b before the heating step has a cap main body portion 20b and an adhesive 30 provided on the inner surface of the cap main body portion 20.
  • the other end portion 22b is positioned in the section P3 where the spacer 60 is provided in the mounted state along the axial direction.
  • the region 710 from the one end portion 21 of the heat shrink cap 10b to the portion 70 to which the spacer 60 is attached is an adhesive within the heat shrink cap 10b that has been heat shrunk. Filled with 30.
  • the other end 22b of the heat shrink cap 10b is located on the outer peripheral surface of the portion 70 to which the spacer 60 is attached.
  • FIG. 9 is a schematic perspective view showing the spacer 60c.
  • the spacer 60c has a cylindrical shape through which the electric wire 40 can be inserted and is connected to the entire circumferential direction. Therefore, the eccentricity of the electric wire 40 with respect to the heat shrink cap 10 can be effectively suppressed as in the above embodiment.
  • the spacer 60 has the convex portion 62 and the groove 63 on the outer peripheral surface thereof has been described, but the aspect in which the convex portion 62 and the groove 63 are not provided on the outer peripheral surface like the spacer 60c (that is, The outer peripheral surface of the spacer may be flat).
  • FIG. 10 is a schematic perspective view showing the spacer 60d.
  • a spacer 60d shown in FIG. 10 may be used.
  • the spacer 60d has a substantially cylindrical shape in which the electric wire 40 can be inserted, and a slit 62d extending along the axial direction in a part of the circumferential direction. Therefore, the electric wire 40 can be inserted into the spacer 60d from the slit 62d in a state before heat shrinkage. Further, the spacer 60d is deformed so as to change the interval of the slits 62d along the circumferential direction (that is, to increase or decrease the diameter) in accordance with the number and thickness of the electric wires 40 inserted into the spacer 60d. Is possible. As a result, the adhesion through the spacer 60d between the electric wire 40 and the heat shrink cap 10 after heat shrink is improved.
  • the cap main body 20 has been described as being formed by closing the one end 21 of the exterior part 23 made of the heat-shrinkable tube at both ends with a plug 28 made of a different material. Not a required configuration.
  • the cap body portion may be formed in a closed tube whose one end portion is closed from the beginning by a heat shrinkable material, or one end portion 21 of the exterior portion 23 formed of a heat shrinkable tube having both ends opened by welding or the like. It may be formed by being closed.
  • the heat shrinkable tube for forming the exterior portion 23 has been described as being used without an adhesive layer provided on the inner surface in advance, but this is an essential configuration. Absent.
  • a tube having an adhesive layer provided on the inner surface in advance may be used as the heat-shrinkable tube for forming the exterior portion 23 .
  • the adhesive 30 may be formed by the adhesive layer, or may be formed by stacking another material on the adhesive layer. The same applies to the plug portion 28.
  • the electric wire 40 is described as an assembly of a plurality of covered electric wires 42, but this is not an essential configuration.
  • the electric wire 40 may be a single covered electric wire 42.

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Abstract

Cette invention concerne une technologie qui améliore l'adhésion serrée entre un câble et un embout thermorétractable après le retrait thermique. Un câble à embout selon l'invention, comprend un câble, un élément d'espacement fixé autour d'une section recouverte du câble et un embout thermorétractable présentant sur une surface interne un agent adhésif contenant une résine thermoplastique, qui est formé en forme de tube de telle sorte qu'une extrémité est fermée et l'autre extrémité est ouverte, et qui est placé sur une section d'âme exposée du câble et de l'élément d'espacement. Lorsque l'embout thermorétractable est dans un état de retrait thermique, la dimension radiale de l'embout thermorétractable dans la section où l'élément d'espacement est fixé le long du sens d'extension du câble est supérieure à la dimension radiale de l'embout thermorétractable dans la section où l'élément d'espacement n'est pas fixé.
PCT/JP2018/006944 2017-03-15 2018-02-26 Câble à embout WO2018168415A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-049795 2017-03-15
JP2017049795A JP2018153064A (ja) 2017-03-15 2017-03-15 キャップ付き電線

Publications (1)

Publication Number Publication Date
WO2018168415A1 true WO2018168415A1 (fr) 2018-09-20

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Citations (2)

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Publication number Priority date Publication date Assignee Title
JPH01189881A (ja) * 1988-01-22 1989-07-31 Nichifu Tanshi Kogyo:Kk 被覆電線の接続方法
WO2009078188A1 (fr) * 2007-12-14 2009-06-25 Sumitomo Wiring Systems, Ltd. Procédé de génération de section jointe étanche à l'eau et faisceau de fils comportant une section jointe étanche à l'eau générée par le procédé

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01189881A (ja) * 1988-01-22 1989-07-31 Nichifu Tanshi Kogyo:Kk 被覆電線の接続方法
WO2009078188A1 (fr) * 2007-12-14 2009-06-25 Sumitomo Wiring Systems, Ltd. Procédé de génération de section jointe étanche à l'eau et faisceau de fils comportant une section jointe étanche à l'eau générée par le procédé

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