WO2014148381A1 - Terminal fitting and method for producing terminal-equipped electric wire - Google Patents

Terminal fitting and method for producing terminal-equipped electric wire Download PDF

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Publication number
WO2014148381A1
WO2014148381A1 PCT/JP2014/056881 JP2014056881W WO2014148381A1 WO 2014148381 A1 WO2014148381 A1 WO 2014148381A1 JP 2014056881 W JP2014056881 W JP 2014056881W WO 2014148381 A1 WO2014148381 A1 WO 2014148381A1
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WO
WIPO (PCT)
Prior art keywords
electric wire
terminal
barrel piece
wire
terminal fitting
Prior art date
Application number
PCT/JP2014/056881
Other languages
French (fr)
Japanese (ja)
Inventor
慶 佐藤
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矢崎総業株式会社
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Filing date
Publication date
Application filed by 矢崎総業株式会社 filed Critical 矢崎総業株式会社
Publication of WO2014148381A1 publication Critical patent/WO2014148381A1/en

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    • 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
    • H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
    • H01R4/185—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion combined with a U-shaped insulation-receiving portion
    • 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
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • 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
    • H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/188—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping having an uneven wire-receiving surface to improve the contact
    • 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
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/113—Resilient sockets co-operating with pins or blades having a rectangular transverse section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes

Definitions

  • the present invention relates to a terminal fitting constituting a wire harness routed in an automobile or the like, and a method of manufacturing a terminal-attached electric wire having the terminal fitting.
  • Wire harnesses for transmitting power, control signals, etc. are routed between electronic devices.
  • Wire harnesses consist of multiple wires, terminal fittings crimped to the ends of each wire, and terminal fittings. And a connector to be accommodated, and the connector is electrically connected to each other by fitting the connector to the mating connector.
  • a connector used for such a wire harness a cylindrical connector housing is generally provided, and a terminal fitting is accommodated in a terminal accommodating chamber (cavity) formed in the connector housing.
  • the terminal fitting is formed by bending a conductive sheet metal or the like, and includes a wire connecting portion connected to the electric wire and an electric contact portion connected to the terminal fitting of the mating connector.
  • the electric wire connecting portion has a crimping portion (barrel piece) that is crimped by crimping with the end of the electric wire, and the inner surface of the crimping portion has a serrated shape to grip the core wire of the electric wire and ensure electrical connection.
  • a serration portion is formed.
  • a terminal structure in which a water stop member is provided on the inner surface of the crimping part has been proposed in order to close the gap between the electric wire connection part and prevent the entry of water or the like into the core wire and the serration part. (For example, refer to Patent Document 1).
  • the crimp terminal 100 described in Patent Document 1 is a female terminal that is connected to a mating male terminal.
  • the electric contact part 101 of the shape, the electric wire connection part 102 provided in the back side of the electric contact part 101, and connected with the electric wire W, and the connection part 103 of the cross-sectional U shape which connects these are provided.
  • FIGS. 7 and 8A, 8B, 8C, 8D, and 8E the crimp terminal 100 described in Patent Document 1 is a female terminal that is connected to a mating male terminal.
  • the wire connecting portion 102 has a barrel piece 104 having a substantially U-shaped cross section that is open to one side before crimping (before crimping), and the inner surface of the barrel piece 104 A serrated serration portion 105 that holds the core wire W1 of the electric wire W is formed. Further, the barrel piece 104 has a plate-like gripping portion 106 extending rearward from the serration portion 105, and the gripping portion 106 grips the insulating coating W2 of the electric wire W.
  • the barrel piece 104 of the crimp terminal 100 is provided with a water-stop member 107 that is continuous four times along the edge of the inner surface, and a water-stop member 108 along the opening-side edge of one outer surface.
  • a water-stop member 107 that is continuous four times along the edge of the inner surface, and a water-stop member 108 along the opening-side edge of one outer surface.
  • the barrel piece 104 is swaged and crushed together with the connecting portion 103, whereby the inner water stop member 107 closes the gap between the barrel pieces 104, thereby the core wire W1 of the electric wire W. And the connection portion between the serration portion 105 and the serration portion 105 are stopped.
  • an object of the present invention is to provide a terminal fitting and a method of manufacturing a terminal-attached electric wire that can improve the water stopping performance between the electric wire and the electric wire.
  • the terminal fitting of the present invention includes an electrical contact portion connected to a counterpart terminal from the front, and an electrical wire connection portion connected to the electric wire on the rear side of the electrical contact portion.
  • the wire connecting portion covers a tip of the electric wire and a barrel piece that is crimped to the electric wire by crimping; a serration portion that is formed on the inner surface of the barrel piece and connected to the core wire of the electric wire;
  • a water stop portion provided on the inner surface of the barrel piece to block a gap with the electric wire, and the barrel piece is formed in a square tube shape having a flat surface by being caulked.
  • the terminal fitting is formed in a square tube shape having a flat surface by crimping the barrel piece, thereby reducing the cross-sectional area of the water stop portion located between the corner portion and the electric wire.
  • the water stop performance can be improved by increasing the volume of the water stop portion.
  • the terminal fitting can prevent water from entering the connecting portion between the core wire and the serration portion. Corrosion can be prevented.
  • the terminal fitting is formed in a square tube shape in which the crimped barrel piece has a flat surface, so that there is no useless space when being accommodated in the terminal accommodating chamber (cavity) of the connector housing. That is, since the terminal accommodating chamber usually has a rectangular inner space, the terminal fitting can be accommodated along the flat surface of the barrel piece on the inner wall of the terminal accommodating chamber. The volume of the water stop portion can be increased without changing the size.
  • the method for manufacturing an electric wire with a terminal is a manufacturing method for manufacturing an electric wire with a terminal by crimping the terminal fitting to the electric wire, and the water stop is provided on the inner surface of the barrel piece. Forming a portion, and by caulking the barrel piece using a mold having a linear portion, the barrel piece is deformed into a rectangular tube shape having a flat surface to cover the tip of the wire, and A water stop part is closely attached to the electric wire.
  • the crimped barrel piece is formed in a square tube shape having a flat surface, the volume of the water stop portion can be increased without changing the size of the connector.
  • the water stop performance between the two can be improved.
  • FIG. 1 is a perspective view showing a terminal-attached electric wire and a connector housing according to an embodiment of the present invention.
  • FIG. 2 is a perspective view showing a terminal-attached electric wire according to an embodiment of the present invention.
  • FIG. 3 is a perspective view showing a terminal fitting used for a terminal-attached electric wire according to an embodiment of the present invention.
  • FIG. 4 is a perspective view showing a procedure for manufacturing a terminal-attached electric wire according to an embodiment of the present invention.
  • FIG. 5A is a cross-sectional view illustrating a crimping process in a manufacturing procedure according to an embodiment of the present invention.
  • FIG. 5B is a cross-sectional view showing the crimping process in the manufacturing procedure according to one embodiment of the present invention.
  • FIG. 5C is a cross-sectional view showing the crimping process in the manufacturing procedure according to the embodiment of the present invention.
  • FIG. 6 is a cross-sectional view showing a state where the terminal fitting according to one embodiment of the present invention is inserted into the connector housing.
  • FIG. 7 is an exploded perspective view showing a conventional electric wire with a terminal.
  • FIG. 8A is a side view showing the conventional electric wire with terminal.
  • FIG. 8B is a cross-sectional view showing the conventional electric wire with terminal.
  • FIG. 8C is a side view showing the conventional electric wire with terminal.
  • FIG. 8D is a cross-sectional view illustrating the conventional electric wire with a terminal.
  • FIG. 8E is a cross-sectional view showing the conventional electric wire with a terminal.
  • the terminal-attached electric wire 1 of the present embodiment constitutes a wire harness that is routed in an automobile or the like, and is a connector of a counterpart provided in a wide variety of electronic devices and other wire harnesses that are installed in the automobile or the like. Are fitted and connected.
  • the wire harness includes a plurality of electric wires W, a terminal fitting 2 crimped to the end of the electric wire W, and a connector C that accommodates the terminal fitting 2.
  • the electric wire W includes a conductive core wire W1 and an insulating coating W2 covering the core wire W1, and the core wire W1 exposed by peeling off the insulating coating W2 at the end of the electric wire W is electrically and mechanically attached to the terminal fitting 2. Connected.
  • the connector C includes a connector housing 10 made of an insulating synthetic resin or the like, and the connector housing 10 includes a plurality (12 in this embodiment) of housing the terminal fittings 2.
  • a terminal accommodating chamber (cavity) 11 is formed.
  • the terminal accommodating chamber 11 extends in the front-rear direction of the connector housing 10 and is formed in a straight cylindrical shape, and is surrounded by an upper surface portion 12, a bottom surface portion 13, and a pair of side surface portions 14.
  • the connector C is provided with a locking lance for restricting the terminal fitting 2 from coming out of the terminal receiving chamber 11 by locking the terminal fitting 2 inside the terminal receiving chamber 11.
  • the connector C is formed with a guide groove 15 for guiding a stabilizer 35 of the terminal fitting 2 described later, extending in the front-rear direction, on the bottom surface portion 13 of the terminal accommodating chamber 11.
  • the terminal fitting 2 is a female terminal fitting formed by punching and bending a conductive sheet metal, and is connected to a counterpart terminal (male terminal) from the front side (left side in FIG. 2).
  • An electrical contact portion 3 having a rectangular tube shape, a wire connection portion 4 provided on the rear side of the electrical contact portion 3 and connected to the electric wire W, and a connection portion 5 having a U-shaped cross section for connecting them are provided.
  • the front in the terminal fitting 2 typically corresponds to the side where the counterpart terminal is located when connected to the counterpart terminal, in other words, from the insulation coating W2 in the extending direction of the electric wire W. This corresponds to the tip end side of the exposed core wire W1 (see FIG. 2).
  • the rear side of the terminal fitting 2 typically corresponds to the side opposite to the side where the counterpart terminal is located when connected to the counterpart terminal, in other words, insulated in the extending direction of the electric wire W. This corresponds to the proximal end side of the core wire W1 exposed from the coating W2 (see FIG. 2).
  • the electrical contact portion 3 is formed in a rectangular tube shape including an upper wall portion 31, a pair of side wall portions 32, and a bottom wall portion 33, and is formed continuously with the bottom plate portion 51 and the pair of side plate portions 52 of the connecting portion 5. Yes.
  • a mating terminal is inserted into the electrical contact portion 3, and an elastic piece 34 is provided to sandwich the mating terminal with the inner surface of the electrical contact portion 3.
  • the terminal fitting 2 is electrically and mechanically connected to the terminal fitting 2 and the counterpart terminal by sandwiching the counterpart terminal between the inner surface of the electrical contact portion 3 and the elastic piece 34 in this way.
  • the electrical contact portion 3 is formed with a stabilizer 35 protruding from one side (or two sides) of the side wall portion 32. The stabilizer 35 is inserted into the guide groove 15 in the connector housing 10 and guided, so that the terminal fitting 2 can be inserted into the connector housing 10 in a predetermined direction.
  • the electric wire connecting portion 4 has a barrel piece 41 that is continuous with the bottom plate portion 51 and the pair of side plate portions 52 of the connecting portion 5, and this barrel piece 41 is in a state before being crimped (the state before crimping shown in FIG. 3). It is formed in a substantially U-shaped cross section that opens on the one side (upward in the figure), and is crimped to the electric wire W by covering and crimping the tip of the electric wire W.
  • the barrel piece 41 is deformed into a square tube section having four flat surfaces 45 by being crimped (see FIG. 5C and the like).
  • a serrated serration portion 42 that holds the core wire W ⁇ b> 1 of the electric wire W is formed on the inner surface of the barrel piece 41.
  • the barrel piece 41 has a plate-like gripping portion 43 extending rearward from the serration portion 42, and the gripping portion 43 grips the insulating coating W2 of the electric wire W.
  • the terminal fitting 2 is provided with a water stop portion 44 that closes a gap with the electric wire W at a portion of the inner surface of the barrel piece 41 excluding the serration portion 42.
  • the manufacturing procedure of the electric wire 1 with a terminal as described above is stamped and bent from a sheet metal and connected in a chain, and is connected from the upstream side (left side in FIG. 4) to the downstream side ( It implements in order of a water stop material sticking process, an electric wire setting process, and a barrel piece caulking process with respect to the some metal fitting 2 conveyed to the right side of FIG.
  • the water-stop material sticking step is performed using a water-stop material sticking apparatus M1 having a sticking head H for sticking the water-stop sheet 44A to the inner surface of the barrel piece 41.
  • the water-stop material sticking device M1 holds the water-stop sheet 44A by suction or the like with the sticking head H and then lowers the sticking head H toward the inner surface of the barrel piece 41.
  • the water stop sheet 44A is stuck on the inner surface of the barrel piece 41 by pressing against the inner surface, whereby the water stop portion 44 is formed.
  • the water stop sheet 44A to be applied a sheet formed using a suitable material such as butyl rubber, silicone rubber, epoxy resin, urethane rubber, or the like can be used. Moreover, it is preferable that an adhesive is provided on the back surface of the water stop sheet 44 ⁇ / b> A facing the inner surface of the barrel piece 41, and even if an adhesive is provided on the surface of the water stop sheet 44 ⁇ / b> A facing the electric wire W. Good.
  • an electric wire supply device sets the tip end portion of the electric wire W inside the barrel piece 41, and subsequently, FIG. 5A, FIG. As shown in FIG. 5C, the terminal piece 2 and the electric wire W are crimped by crimping the barrel piece 41 using the crimping device M2.
  • the crimping apparatus M2 includes a lower mold K1 and an upper mold K2.
  • the lower mold K1 has a substantially straight first molding surface S1 (straight portion) on which the bottom surface portion of the barrel piece 41 is placed.
  • the upper mold K2 includes a pair of substantially linear second molding surfaces S2 (straight portions) that mold the side surfaces of the barrel pieces 41, and a substantially linear third molding surface S3 (straight portion) that molds the upper surfaces of the barrel pieces 41. ).
  • the barrel piece 41 swaged by the lower mold K1 and the upper mold K2 is deformed into a square tube section having four flat surfaces 45. That is, the lower die which is a mold having the water stop portion 44 formed on the inner surface of the barrel piece 41 as described above and having the first molding surface S1, the second molding surface S2, and the third molding surface S3 as straight portions.
  • the barrel piece 41 By caulking the barrel 41 piece using K1 and the upper mold K2, the barrel piece 41 is deformed into a rectangular tube shape having four flat surfaces 45 so as to cover the tip end portion of the electric wire W, and the water stopping portion 44. Is in close contact with the electric wire W.
  • the chain-like terminal fitting 2 is cut off, whereby the terminal-attached electric wire 1 in which the terminal fitting 2B is crimped to the end of the electric wire W is manufactured.
  • the terminal fitting 2 of the terminal-attached electric wire 1 manufactured in this way is inserted into the terminal accommodating chamber 11 of the connector housing 10, as shown in FIG. 6, the four flat surfaces 45 are respectively the upper surface portion 12 of the terminal accommodating chamber 11, The terminal fitting 2 is accommodated in a state along the bottom surface portion 13 and the pair of side surface portions 14.
  • the water stop portion positioned between the corner portion and the electric wire W is formed by forming the barrel piece 41 into a square tube shape having a flat surface 45 by caulking.
  • the cross-sectional area of 44 can be enlarged, and the water stop performance can be improved by expanding the volume of the water stop portion 44.
  • the crimped barrel piece 41 is formed in a rectangular tube shape having a flat surface 45, a wasteful space is not generated when being accommodated in the terminal accommodating chamber 11 of the connector housing 10, and the terminal accommodation. Since the terminal fitting 2 can be accommodated along the flat surface 45 of the barrel piece 41 on the inner wall (the upper surface portion 12, the bottom surface portion 13, and the pair of side surface portions 14) of the chamber 11, the size of the connector C is changed. The volume of the water stop part 44 can be expanded without this.
  • a female terminal is exemplified as the terminal fitting 2, but the terminal fitting of the present invention is not limited to a female terminal, and may be a male terminal.
  • seat 44A using the water stop material sticking apparatus M1 was illustrated as a formation method of the water stop part 44, it is not restricted to this, It is liquid using an application head.
  • the water stop material may be applied to the inner surface of the barrel piece 41, may be applied using a brush-like applicator with a water stop material immersed at the tip, or the barrel piece in a state where the serration portion 42 is masked. 41 may be applied by immersing it in a liquid waterproofing material.
  • the formation range of the water stop portion 44 on the inner surface of the barrel piece 41 may be the entire inner surface of the barrel piece 41 except for the serration portion 42, or may be only on the front side or the rear side of the barrel piece 41. Can be set to

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  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Abstract

An electric-wire connection part (4) of a terminal fitting (2) comprises: a barrel piece (41) that covers the tip-end part of an electric wire (W) and that is press-fitted onto the electric wire (W) by crimping; a serration part (42) that is formed on the inner surface of the barrel piece (41) and that is connected to the core wire (W1) of the electric wire (W); and a water-stopping part (44) that is provided on the inner surface of the barrel piece (41) and that stops up the space between the electric wire (W) and the electric-wire connection part. By being crimped, the barrel piece (41) is formed so as to have a rectangular tube-shaped cross section with flat surfaces (45). Thus, it is possible to increase the cross-sectional area of the water-stopping part (44) located between the electric wire (W) and the corners of the barrel piece, and it is possible to improve water-stopping performance by the increase in volume of the water-stopping part (44). Thus, a terminal fitting capable of improving water-stopping performance between the same and an electric wire, and a method for producing a terminal-equipped electric wire are provided.

Description

端子金具及び端子付き電線の製造方法Manufacturing method of terminal fitting and electric wire with terminal
　本発明は、自動車などに配索されるワイヤハーネスを構成する端子金具、及び該端子金具を有した端子付き電線の製造方法に関する。 The present invention relates to a terminal fitting constituting a wire harness routed in an automobile or the like, and a method of manufacturing a terminal-attached electric wire having the terminal fitting.
　通常、電子機器間には、電力や制御信号などを伝えるためのワイヤハーネスが配索されており、ワイヤハーネスは、複数の電線と、各電線の端末に圧着された端子金具と、端子金具を収容するコネクタとを備え、このコネクタを相手方のコネクタに嵌合させることで、互いに電気的に接続されている。このようなワイヤハーネスに用いられるコネクタとしては、一般的に筒状のコネクタハウジングを備え、このコネクタハウジングに形成された端子収容室（キャビティ）に端子金具が収容されている。 Usually, wire harnesses for transmitting power, control signals, etc. are routed between electronic devices. Wire harnesses consist of multiple wires, terminal fittings crimped to the ends of each wire, and terminal fittings. And a connector to be accommodated, and the connector is electrically connected to each other by fitting the connector to the mating connector. As a connector used for such a wire harness, a cylindrical connector housing is generally provided, and a terminal fitting is accommodated in a terminal accommodating chamber (cavity) formed in the connector housing.
　端子金具は、導電性の板金を折り曲げる等して形成され、電線と接続される電線接続部と、相手方のコネクタの端子金具と接続される電気接触部と、を備えている。電線接続部は、電線の端末と加締めにより圧着される圧着部（バレル片）を有し、この圧着部の内面には、電線の芯線を把持して電気接続を確保するために鋸歯状のセレーション部が形成されている。また、電線接続部において、電線との間の隙間を塞ぎ、芯線及びセレーション部への水等の浸入を阻止するために、圧着部の内面に止水部材が設けられた端子構造が提案されている（例えば、特許文献１参照）。 The terminal fitting is formed by bending a conductive sheet metal or the like, and includes a wire connecting portion connected to the electric wire and an electric contact portion connected to the terminal fitting of the mating connector. The electric wire connecting portion has a crimping portion (barrel piece) that is crimped by crimping with the end of the electric wire, and the inner surface of the crimping portion has a serrated shape to grip the core wire of the electric wire and ensure electrical connection. A serration portion is formed. In addition, a terminal structure in which a water stop member is provided on the inner surface of the crimping part has been proposed in order to close the gap between the electric wire connection part and prevent the entry of water or the like into the core wire and the serration part. (For example, refer to Patent Document 1).
　特許文献１に記載された圧着端子１００は、図７及び図８Ａ、図８Ｂ、図８Ｃ、図８Ｄ、図８Ｅに示すように、相手方の雄端子と接続される雌端子であって、角筒状の電気接触部１０１と、電気接触部１０１の後方側に設けられて電線Ｗと接続される電線接続部１０２と、これらを連結する断面コ字状の連結部１０３とを備えている。電線接続部１０２は、図８Ａ、図８Ｂ、図８Ｃに示すように、加締められる前（圧着前）において一方に開口した断面略Ｕ字状のバレル片１０４を有し、バレル片１０４の内面には、電線Ｗの芯線Ｗ１を保持する鋸歯状のセレーション部１０５が形成されている。また、バレル片１０４は、セレーション部１０５よりも後方側に延びる板状の把持部１０６を有し、この把持部１０６で電線Ｗの絶縁被覆Ｗ２を把持するようになっている。 As shown in FIGS. 7 and 8A, 8B, 8C, 8D, and 8E, the crimp terminal 100 described in Patent Document 1 is a female terminal that is connected to a mating male terminal. The electric contact part 101 of the shape, the electric wire connection part 102 provided in the back side of the electric contact part 101, and connected with the electric wire W, and the connection part 103 of the cross-sectional U shape which connects these are provided. As shown in FIGS. 8A, 8B, and 8C, the wire connecting portion 102 has a barrel piece 104 having a substantially U-shaped cross section that is open to one side before crimping (before crimping), and the inner surface of the barrel piece 104 A serrated serration portion 105 that holds the core wire W1 of the electric wire W is formed. Further, the barrel piece 104 has a plate-like gripping portion 106 extending rearward from the serration portion 105, and the gripping portion 106 grips the insulating coating W2 of the electric wire W.
　さらに、圧着端子１００のバレル片１０４には、その内面の端縁に沿って四周連続する止水部材１０７と、一方の外面の開口側端縁に沿った止水部材１０８と、が設けられている。そして、図８Ｄ、図８Ｅに示すように、バレル片１０４を加締めて電線Ｗと圧着された状態において、バレル片１０４の開口側端縁同士が重なって電線Ｗの周囲を覆うとともに、内側の止水部材１０７が電線Ｗの絶縁被覆Ｗ２に密着し、かつ、重なり部で止水部材１０７，１０８同士が互いに密着する。さらに、電線接続部１０２の前方側において、連結部１０３とともにバレル片１０４が加締めて潰されることで、内側の止水部材１０７がバレル片１０４間の隙間を塞ぎ、これによって電線Ｗの芯線Ｗ１とセレーション部１０５との接続部が止水されるようになっている。 Further, the barrel piece 104 of the crimp terminal 100 is provided with a water-stop member 107 that is continuous four times along the edge of the inner surface, and a water-stop member 108 along the opening-side edge of one outer surface. Yes. 8D and 8E, in a state where the barrel piece 104 is crimped and crimped to the electric wire W, the opening side edges of the barrel piece 104 overlap to cover the periphery of the electric wire W, and The water stop member 107 is in close contact with the insulating coating W2 of the electric wire W, and the water stop members 107 and 108 are in close contact with each other at the overlapping portion. Further, on the front side of the electric wire connecting portion 102, the barrel piece 104 is swaged and crushed together with the connecting portion 103, whereby the inner water stop member 107 closes the gap between the barrel pieces 104, thereby the core wire W1 of the electric wire W. And the connection portion between the serration portion 105 and the serration portion 105 are stopped.
国際公開ＷＯ２０１１／１２２６２２Ａ１号公報International Publication WO2011 / 122622A1
　しかしながら、特許文献１に示されたような従来の端子金具では、電線接続部１０２の把持部１０６が加締められて断面円筒状に変形し、この把持部１０６で電線Ｗが囲まれることとなるため、止水部材の断面積を十分に確保することができず、電線Ｗの芯線Ｗ１とセレーション部１０５との接続部に対する止水性能を向上させることが困難であった。 However, in the conventional terminal fitting as shown in Patent Document 1, the gripping portion 106 of the wire connecting portion 102 is crimped and deformed into a cylindrical cross section, and the wire W is surrounded by the gripping portion 106. Therefore, the cross-sectional area of the water stop member cannot be sufficiently secured, and it is difficult to improve the water stop performance for the connection portion between the core wire W1 of the electric wire W and the serration portion 105.
　本発明は、上記した点に鑑み、電線との間の止水性能を向上させることができる端子金具及び端子付き電線の製造方法の提供を目的とする。 In view of the above points, an object of the present invention is to provide a terminal fitting and a method of manufacturing a terminal-attached electric wire that can improve the water stopping performance between the electric wire and the electric wire.
　前記課題を解決するために、本発明の端子金具は、前方からの相手方端子と接続される電気接触部と、該電気接触部よりも後方側にて電線と接続される電線接続部と、を備え、前記電線接続部は、前記電線の先端部を覆って加締めにより該電線と圧着されるバレル片と、前記バレル片の内面に形成されて前記電線の芯線と接続されるセレーション部と、前記バレル片の内面に設けられて前記電線との隙間を塞ぐ止水部と、を備え、前記バレル片は、加締められることで平坦面を有した断面角筒状に形成されていることを特徴とする。 In order to solve the above-mentioned problem, the terminal fitting of the present invention includes an electrical contact portion connected to a counterpart terminal from the front, and an electrical wire connection portion connected to the electric wire on the rear side of the electrical contact portion. The wire connecting portion covers a tip of the electric wire and a barrel piece that is crimped to the electric wire by crimping; a serration portion that is formed on the inner surface of the barrel piece and connected to the core wire of the electric wire; A water stop portion provided on the inner surface of the barrel piece to block a gap with the electric wire, and the barrel piece is formed in a square tube shape having a flat surface by being caulked. Features.
　上記構成により、端子金具は、バレル片が加締められることで平坦面を有した断面角筒状に形成されることで、その角部と電線との間に位置する止水部の断面積を大きくすることができ、止水部の容積拡大による止水性能の向上を図ることができる。端子金具は、このような止水部によってバレル片と電線との隙間を塞ぐことによって、芯線とセレーション部との接続部に対して水等の浸入を阻止することができ、端子金具や芯線の腐食を防止することができる。また、端子金具は、加締められたバレル片が平坦面を有した断面角筒状に形成されることで、コネクタハウジングの端子収容室（キャビティ）に収容される際の無駄なスペースが生じない、即ち、端子収容室は通常、角筒状の内部空間を有していることから、端子収容室の内壁にバレル片の平坦面を沿わせて端子金具を収容することができるので、コネクタのサイズを変更することなく止水部の容積を拡大することができる。 With the above configuration, the terminal fitting is formed in a square tube shape having a flat surface by crimping the barrel piece, thereby reducing the cross-sectional area of the water stop portion located between the corner portion and the electric wire. The water stop performance can be improved by increasing the volume of the water stop portion. By closing the gap between the barrel piece and the electric wire with such a water stop, the terminal fitting can prevent water from entering the connecting portion between the core wire and the serration portion. Corrosion can be prevented. Further, the terminal fitting is formed in a square tube shape in which the crimped barrel piece has a flat surface, so that there is no useless space when being accommodated in the terminal accommodating chamber (cavity) of the connector housing. That is, since the terminal accommodating chamber usually has a rectangular inner space, the terminal fitting can be accommodated along the flat surface of the barrel piece on the inner wall of the terminal accommodating chamber. The volume of the water stop portion can be increased without changing the size.
　前記課題を解決するために、本発明の端子付き電線の製造方法は、上記端子金具を電線に圧着して端子付き電線を製造するための製造方法であり、前記バレル片の内面に前記止水部を形成し、直線部を有した金型を用いて前記バレル片を加締めることで、該バレル片を平坦面を有した角筒状に変形させて前記電線の先端部を覆うとともに、前記止水部を前記電線に密着させることを特徴とする。 In order to solve the above-mentioned problem, the method for manufacturing an electric wire with a terminal according to the present invention is a manufacturing method for manufacturing an electric wire with a terminal by crimping the terminal fitting to the electric wire, and the water stop is provided on the inner surface of the barrel piece. Forming a portion, and by caulking the barrel piece using a mold having a linear portion, the barrel piece is deformed into a rectangular tube shape having a flat surface to cover the tip of the wire, and A water stop part is closely attached to the electric wire.
　上記構成により、直線部を有した金型を用いてバレル片を加締めることで、平坦面を有した断面角筒状の電線接続部を容易に成形することができ、圧着作業の作業効率を向上させることができる。 With the above configuration, by crimping the barrel piece using a mold having a straight line portion, it is possible to easily form an electric wire connecting portion having a flat cross section with a rectangular cross section, and to improve the work efficiency of the crimping operation. Can be improved.
　本発明によれば、加締められたバレル片が平坦面を有した断面角筒状に形成されているので、コネクタのサイズを変更することなく止水部の容積を拡大することができ、電線との間の止水性能を向上させることができる。 According to the present invention, since the crimped barrel piece is formed in a square tube shape having a flat surface, the volume of the water stop portion can be increased without changing the size of the connector. The water stop performance between the two can be improved.
図１は、本発明の一実施形態に係る端子付き電線及びコネクタハウジングを示す斜視図である。FIG. 1 is a perspective view showing a terminal-attached electric wire and a connector housing according to an embodiment of the present invention. 図２は、本発明の一実施形態に係る端子付き電線を示す斜視図である。FIG. 2 is a perspective view showing a terminal-attached electric wire according to an embodiment of the present invention. 図３は、本発明の一実施形態に係る端子付き電線に用いられる端子金具を示す斜視図である。FIG. 3 is a perspective view showing a terminal fitting used for a terminal-attached electric wire according to an embodiment of the present invention. 図４は、本発明の一実施形態に係る端子付き電線の製造手順を示す斜視図である。FIG. 4 is a perspective view showing a procedure for manufacturing a terminal-attached electric wire according to an embodiment of the present invention. 図５Ａは、本発明の一実施形態に係る製造手順における圧着工程を示す断面図である。FIG. 5A is a cross-sectional view illustrating a crimping process in a manufacturing procedure according to an embodiment of the present invention. 図５Ｂは、本発明の一実施形態に係る製造手順における圧着工程を示す断面図である。FIG. 5B is a cross-sectional view showing the crimping process in the manufacturing procedure according to one embodiment of the present invention. 図５Ｃは、本発明の一実施形態に係る製造手順における圧着工程を示す断面図である。FIG. 5C is a cross-sectional view showing the crimping process in the manufacturing procedure according to the embodiment of the present invention. 図６は、本発明の一実施形態に係る端子金具をコネクタハウジングに挿入した状態を示す断面図である。FIG. 6 is a cross-sectional view showing a state where the terminal fitting according to one embodiment of the present invention is inserted into the connector housing. 図７は、従来の端子付き電線を示す分解斜視図である。FIG. 7 is an exploded perspective view showing a conventional electric wire with a terminal. 図８Ａは、前記従来の端子付き電線を示す側面図である。FIG. 8A is a side view showing the conventional electric wire with terminal. 図８Ｂは、前記従来の端子付き電線を示す断面図である。FIG. 8B is a cross-sectional view showing the conventional electric wire with terminal. 図８Ｃは、前記従来の端子付き電線を示す側面図である。FIG. 8C is a side view showing the conventional electric wire with terminal. 図８Ｄは、前記従来の端子付き電線を示す断面図である。FIG. 8D is a cross-sectional view illustrating the conventional electric wire with a terminal. 図８Ｅは、前記従来の端子付き電線を示す断面図である。FIG. 8E is a cross-sectional view showing the conventional electric wire with a terminal.
［実施形態］
　以下、本発明の実施形態にかかる端子付き電線を、図１～図６を参照して説明する。本実施形態の端子付き電線１は、自動車などに配索されるワイヤハーネスを構成するものであって、自動車等に搭載される多種多様な電子機器や他のワイヤハーネスに設けられた相手方のコネクタに嵌合して接続されるものである。ワイヤハーネスは、複数の電線Ｗと、電線Ｗの端末に圧着された端子金具２と、端子金具２を収容するコネクタＣとを備えている。電線Ｗは、導電性の芯線Ｗ１と、この芯線Ｗ１を被覆する絶縁被覆Ｗ２とを備え、その端部の絶縁被覆Ｗ２が皮剥きされて露出された芯線Ｗ１が端子金具２に電気的かつ機械的に接続されている。 [Embodiment]
Hereinafter, an electric wire with a terminal according to an embodiment of the present invention will be described with reference to FIGS. The terminal-attached electric wire 1 of the present embodiment constitutes a wire harness that is routed in an automobile or the like, and is a connector of a counterpart provided in a wide variety of electronic devices and other wire harnesses that are installed in the automobile or the like. Are fitted and connected. The wire harness includes a plurality of electric wires W, a terminal fitting 2 crimped to the end of the electric wire W, and a connector C that accommodates the terminal fitting 2. The electric wire W includes a conductive core wire W1 and an insulating coating W2 covering the core wire W1, and the core wire W1 exposed by peeling off the insulating coating W2 at the end of the electric wire W is electrically and mechanically attached to the terminal fitting 2. Connected.
　コネクタＣは、図１に示すように、絶縁性の合成樹脂等で構成されたコネクタハウジング１０を備え、このコネクタハウジング１０には、端子金具２を収容する複数（本実施形態では１２個）の端子収容室（キャビティ）１１が形成されている。端子収容室１１は、コネクタハウジング１０の前後方向に延びて直線筒状に形成されており、上面部１２、底面部１３、及び一対の側面部１４で囲まれている。コネクタＣは、端子収容室１１の内部には、端子金具２を係止することによって端子収容室１１からの端子金具２の抜け出しを規制する係止ランスが設けられている。また、コネクタＣは、端子収容室１１の底面部１３には、後述する端子金具２のスタビライザ３５を案内する案内溝１５が前後方向に延びて形成されている。 As shown in FIG. 1, the connector C includes a connector housing 10 made of an insulating synthetic resin or the like, and the connector housing 10 includes a plurality (12 in this embodiment) of housing the terminal fittings 2. A terminal accommodating chamber (cavity) 11 is formed. The terminal accommodating chamber 11 extends in the front-rear direction of the connector housing 10 and is formed in a straight cylindrical shape, and is surrounded by an upper surface portion 12, a bottom surface portion 13, and a pair of side surface portions 14. The connector C is provided with a locking lance for restricting the terminal fitting 2 from coming out of the terminal receiving chamber 11 by locking the terminal fitting 2 inside the terminal receiving chamber 11. Further, the connector C is formed with a guide groove 15 for guiding a stabilizer 35 of the terminal fitting 2 described later, extending in the front-rear direction, on the bottom surface portion 13 of the terminal accommodating chamber 11.
　端子金具２は、導電性の板金に打ち抜き加工と折り曲げ加工が施されて形成された雌型端子金具であり、前方側（図２中、左側）からの相手方端子（雄端子）と接続される角筒状の電気接触部３と、電気接触部３の後方側に設けられて電線Ｗと接続される電線接続部４と、これらを連結する断面コ字状の連結部５とを備えている。ここで、端子金具２における前方とは、典型的には、相手方端子と接続された際に、当該相手方端子が位置する側に相当し、言い換えれば、電線Ｗの延在方向において絶縁被覆Ｗ２から露出された芯線Ｗ１の先端側に相当する（図２参照）。一方、端子金具２における後方とは、典型的には、相手方端子と接続された際に、当該相手方端子が位置する側とは反対側に相当し、言い換えれば、電線Ｗの延在方向において絶縁被覆Ｗ２から露出された芯線Ｗ１の基端側に相当する（図２参照）。 The terminal fitting 2 is a female terminal fitting formed by punching and bending a conductive sheet metal, and is connected to a counterpart terminal (male terminal) from the front side (left side in FIG. 2). An electrical contact portion 3 having a rectangular tube shape, a wire connection portion 4 provided on the rear side of the electrical contact portion 3 and connected to the electric wire W, and a connection portion 5 having a U-shaped cross section for connecting them are provided. . Here, the front in the terminal fitting 2 typically corresponds to the side where the counterpart terminal is located when connected to the counterpart terminal, in other words, from the insulation coating W2 in the extending direction of the electric wire W. This corresponds to the tip end side of the exposed core wire W1 (see FIG. 2). On the other hand, the rear side of the terminal fitting 2 typically corresponds to the side opposite to the side where the counterpart terminal is located when connected to the counterpart terminal, in other words, insulated in the extending direction of the electric wire W. This corresponds to the proximal end side of the core wire W1 exposed from the coating W2 (see FIG. 2).
　電気接触部３は、上壁部３１、一対の側壁部３２、及び底壁部３３からなる四角筒状に形成され、連結部５の底板部５１及び一対の側板部５２に連なって形成されている。端子金具２は、電気接触部３内には、相手方端子が挿入され、この相手方端子を電気接触部３の内面との間に挟持する弾性片３４が設けられている。端子金具２は、このように電気接触部３の内面と弾性片３４との間に相手方端子を挟持することで、端子金具２と相手方端子とが電気的かつ機械的に接続される。また、端子金具２は、電気接触部３には、側壁部３２の一辺（又は二辺）から突出したスタビライザ３５が形成されている。スタビライザ３５は、コネクタハウジング１０内部の案内溝１５に挿通されて案内されることで、端子金具２を所定の向きでコネクタハウジング１０に挿入することができるようになっている。 The electrical contact portion 3 is formed in a rectangular tube shape including an upper wall portion 31, a pair of side wall portions 32, and a bottom wall portion 33, and is formed continuously with the bottom plate portion 51 and the pair of side plate portions 52 of the connecting portion 5. Yes. In the terminal fitting 2, a mating terminal is inserted into the electrical contact portion 3, and an elastic piece 34 is provided to sandwich the mating terminal with the inner surface of the electrical contact portion 3. The terminal fitting 2 is electrically and mechanically connected to the terminal fitting 2 and the counterpart terminal by sandwiching the counterpart terminal between the inner surface of the electrical contact portion 3 and the elastic piece 34 in this way. In the terminal fitting 2, the electrical contact portion 3 is formed with a stabilizer 35 protruding from one side (or two sides) of the side wall portion 32. The stabilizer 35 is inserted into the guide groove 15 in the connector housing 10 and guided, so that the terminal fitting 2 can be inserted into the connector housing 10 in a predetermined direction.
　電線接続部４は、連結部５の底板部５１及び一対の側板部５２に連続するバレル片４１を有し、このバレル片４１は、加締められる前（図３に示す圧着前の状態）において一方（図中、上方）に開口した断面略Ｕ字状に形成されるとともに、電線Ｗの先端部を覆って加締められることにより電線Ｗと圧着される。バレル片４１は、加締められることで４つの平坦面４５を有した断面角筒状に変形される（図５Ｃ等参照）。端子金具２は、このバレル片４１の内面には、電線Ｗの芯線Ｗ１を保持する鋸歯状のセレーション部４２が形成されている。また、バレル片４１は、セレーション部４２よりも後方側に延びる板状の把持部４３を有し、この把持部４３で電線Ｗの絶縁被覆Ｗ２を把持するようになっている。また、端子金具２は、バレル片４１の内面におけるセレーション部４２を除いた部分には、電線Ｗとの隙間を塞ぐ止水部４４が設けられている。 The electric wire connecting portion 4 has a barrel piece 41 that is continuous with the bottom plate portion 51 and the pair of side plate portions 52 of the connecting portion 5, and this barrel piece 41 is in a state before being crimped (the state before crimping shown in FIG. 3). It is formed in a substantially U-shaped cross section that opens on the one side (upward in the figure), and is crimped to the electric wire W by covering and crimping the tip of the electric wire W. The barrel piece 41 is deformed into a square tube section having four flat surfaces 45 by being crimped (see FIG. 5C and the like). In the terminal fitting 2, a serrated serration portion 42 that holds the core wire W <b> 1 of the electric wire W is formed on the inner surface of the barrel piece 41. Further, the barrel piece 41 has a plate-like gripping portion 43 extending rearward from the serration portion 42, and the gripping portion 43 grips the insulating coating W2 of the electric wire W. Further, the terminal fitting 2 is provided with a water stop portion 44 that closes a gap with the electric wire W at a portion of the inner surface of the barrel piece 41 excluding the serration portion 42.
　以上のような端子付き電線１の製造手順としては、図４に示すように、板金から打ち抜き加工及び折り曲げ加工されて連鎖状に連結されるとともに、上流側（図４の左側）から下流側（図４の右側）に搬送される複数の端子金具２に対して、止水材貼付工程、電線セット工程、バレル片加締め工程の順で実施される。止水材貼付工程は、バレル片４１の内面に止水シート４４Ａを貼付する貼付ヘッドＨを有した止水材貼付装置Ｍ１を用いて行われる。止水材貼付装置Ｍ１は、貼付ヘッドＨで止水シート４４Ａを吸引等により保持してから、この貼付ヘッドＨをバレル片４１の内面に向けて下降させ、この貼付ヘッドＨをバレル片４１の内面に押し付け、これによりバレル片４１の内面に止水シート４４Ａを貼付し、これにより止水部４４が形成される。 As shown in FIG. 4, the manufacturing procedure of the electric wire 1 with a terminal as described above is stamped and bent from a sheet metal and connected in a chain, and is connected from the upstream side (left side in FIG. 4) to the downstream side ( It implements in order of a water stop material sticking process, an electric wire setting process, and a barrel piece caulking process with respect to the some metal fitting 2 conveyed to the right side of FIG. The water-stop material sticking step is performed using a water-stop material sticking apparatus M1 having a sticking head H for sticking the water-stop sheet 44A to the inner surface of the barrel piece 41. The water-stop material sticking device M1 holds the water-stop sheet 44A by suction or the like with the sticking head H and then lowers the sticking head H toward the inner surface of the barrel piece 41. The water stop sheet 44A is stuck on the inner surface of the barrel piece 41 by pressing against the inner surface, whereby the water stop portion 44 is formed.
　ここで、塗布する止水シート４４Ａとしては、ブチルゴムやシリコーンゴム、エポキシ樹脂、ウレタンゴム等、適宜な材料を用いてシート状に成形したものが利用可能である。また、バレル片４１の内面に対向する止水シート４４Ａの裏面には、粘着剤が設けられていることが好ましく、電線Ｗに対向する止水シート４４Ａの表面に粘着剤が設けられていてもよい。 Here, as the water stop sheet 44A to be applied, a sheet formed using a suitable material such as butyl rubber, silicone rubber, epoxy resin, urethane rubber, or the like can be used. Moreover, it is preferable that an adhesive is provided on the back surface of the water stop sheet 44 </ b> A facing the inner surface of the barrel piece 41, and even if an adhesive is provided on the surface of the water stop sheet 44 </ b> A facing the electric wire W. Good.
　以上のようにバレル片４１の内面に止水部４４を形成したら、図示しない電線供給装置がバレル片４１の内側に電線Ｗの先端部をセットし、これに続いて、図５Ａ、図５Ｂ、図５Ｃに示すように、圧着装置Ｍ２を用いてバレル片４１を加締めて端子金具２と電線Ｗとを圧着する。圧着装置Ｍ２は、下型Ｋ１と上型Ｋ２とを備える。下型Ｋ１は、バレル片４１の底面部を載置する略直線状の第一成形面Ｓ１（直線部）を有する。上型Ｋ２は、バレル片４１の側面を成形する略直線状の一対の第二成形面Ｓ２（直線部）と、バレル片４１の上面を成形する略直線状の第三成形面Ｓ３（直線部）とを有して形成されている。このような下型Ｋ１と上型Ｋ２とで加締められたバレル片４１は、４つの平坦面４５を有した断面角筒状に変形される。つまり、上記のようにバレル片４１の内面に止水部４４を形成し、直線部としての第一成形面Ｓ１、第二成形面Ｓ２、第三成形面Ｓ３を有した金型である下型Ｋ１、上型Ｋ２を用いてバレル４１片を加締めることで、該バレル片４１を４つの平坦面４５を有した角筒状に変形させて電線Ｗの先端部を覆うとともに、止水部４４を電線Ｗに密着させる。 If the water stop part 44 is formed on the inner surface of the barrel piece 41 as described above, an electric wire supply device (not shown) sets the tip end portion of the electric wire W inside the barrel piece 41, and subsequently, FIG. 5A, FIG. As shown in FIG. 5C, the terminal piece 2 and the electric wire W are crimped by crimping the barrel piece 41 using the crimping device M2. The crimping apparatus M2 includes a lower mold K1 and an upper mold K2. The lower mold K1 has a substantially straight first molding surface S1 (straight portion) on which the bottom surface portion of the barrel piece 41 is placed. The upper mold K2 includes a pair of substantially linear second molding surfaces S2 (straight portions) that mold the side surfaces of the barrel pieces 41, and a substantially linear third molding surface S3 (straight portion) that molds the upper surfaces of the barrel pieces 41. ). The barrel piece 41 swaged by the lower mold K1 and the upper mold K2 is deformed into a square tube section having four flat surfaces 45. That is, the lower die which is a mold having the water stop portion 44 formed on the inner surface of the barrel piece 41 as described above and having the first molding surface S1, the second molding surface S2, and the third molding surface S3 as straight portions. By caulking the barrel 41 piece using K1 and the upper mold K2, the barrel piece 41 is deformed into a rectangular tube shape having four flat surfaces 45 so as to cover the tip end portion of the electric wire W, and the water stopping portion 44. Is in close contact with the electric wire W.
　バレル片４１を加締めて端子金具２と電線Ｗとを圧着したら、連鎖状の端子金具２を切り離すことで、電線Ｗの端末に端子金具２Ｂが圧着された端子付き電線１が製造される。このようにして製造した端子付き電線１の端子金具２をコネクタハウジング１０の端子収容室１１に挿入すると、図６に示すように、４つの平坦面４５がそれぞれ端子収容室１１の上面部１２、底面部１３、及び一対の側面部１４に沿った状態で端子金具２が収容されるようになっている。 After crimping the barrel piece 41 and crimping the terminal fitting 2 and the electric wire W, the chain-like terminal fitting 2 is cut off, whereby the terminal-attached electric wire 1 in which the terminal fitting 2B is crimped to the end of the electric wire W is manufactured. When the terminal fitting 2 of the terminal-attached electric wire 1 manufactured in this way is inserted into the terminal accommodating chamber 11 of the connector housing 10, as shown in FIG. 6, the four flat surfaces 45 are respectively the upper surface portion 12 of the terminal accommodating chamber 11, The terminal fitting 2 is accommodated in a state along the bottom surface portion 13 and the pair of side surface portions 14.
　以上の本実施形態によれば、バレル片４１が加締められることで平坦面４５を有した断面角筒状に形成されることで、その角部と電線Ｗとの間に位置する止水部４４の断面積を大きくすることができ、止水部４４の容積拡大による止水性能の向上を図ることができる。このような止水部４４によってバレル片４１と電線Ｗとの隙間を塞ぐことによって、芯線Ｗ１とセレーション部４２との接続部に対して水等の浸入を阻止することができ、端子金具２や芯線Ｗ１の腐食を防止することができる。また、加締められたバレル片４１が平坦面４５を有した断面角筒状に形成されることで、コネクタハウジング１０の端子収容室１１に収容される際の無駄なスペースが生じず、端子収容室１１の内壁（上面部１２、底面部１３、及び一対の側面部１４）にバレル片４１の平坦面４５を沿わせて端子金具２を収容することができるので、コネクタＣのサイズを変更することなく止水部４４の容積を拡大することができる。 According to the above embodiment, the water stop portion positioned between the corner portion and the electric wire W is formed by forming the barrel piece 41 into a square tube shape having a flat surface 45 by caulking. The cross-sectional area of 44 can be enlarged, and the water stop performance can be improved by expanding the volume of the water stop portion 44. By closing the gap between the barrel piece 41 and the electric wire W by such a water stop portion 44, it is possible to prevent water and the like from entering the connecting portion between the core wire W1 and the serration portion 42. Corrosion of the core wire W1 can be prevented. In addition, since the crimped barrel piece 41 is formed in a rectangular tube shape having a flat surface 45, a wasteful space is not generated when being accommodated in the terminal accommodating chamber 11 of the connector housing 10, and the terminal accommodation. Since the terminal fitting 2 can be accommodated along the flat surface 45 of the barrel piece 41 on the inner wall (the upper surface portion 12, the bottom surface portion 13, and the pair of side surface portions 14) of the chamber 11, the size of the connector C is changed. The volume of the water stop part 44 can be expanded without this.
　なお、前記実施形態では、端子金具２として雌端子を例示したが、本発明の端子金具は雌端子に限らず、雄端子であってもよい。
　また、前記実施形態では、止水部４４の形成方法として、止水材貼付装置Ｍ１を用いて止水シート４４Ａを貼付する方法を例示したが、これに限らず、塗布ヘッドを用いて液状の止水材をバレル片４１の内面に塗布してもよいし、先端に止水材を浸した筆状の塗布具を用いて塗布してもよいし、セレーション部４２をマスキングした状態のバレル片４１を液状の止水材に浸漬して塗布してもよい。
　また、バレル片４１の内面における止水部４４の形成範囲は、セレーション部４２を除き、バレル片４１の内面全てでもよいし、バレル片４１の前方側又は後方側のいずれかのみでもよく、適宜に設定することができる。 In the above embodiment, a female terminal is exemplified as the terminal fitting 2, but the terminal fitting of the present invention is not limited to a female terminal, and may be a male terminal.
Moreover, in the said embodiment, although the method of sticking the water stop sheet | seat 44A using the water stop material sticking apparatus M1 was illustrated as a formation method of the water stop part 44, it is not restricted to this, It is liquid using an application head. The water stop material may be applied to the inner surface of the barrel piece 41, may be applied using a brush-like applicator with a water stop material immersed at the tip, or the barrel piece in a state where the serration portion 42 is masked. 41 may be applied by immersing it in a liquid waterproofing material.
Further, the formation range of the water stop portion 44 on the inner surface of the barrel piece 41 may be the entire inner surface of the barrel piece 41 except for the serration portion 42, or may be only on the front side or the rear side of the barrel piece 41. Can be set to
　１　　　端子付き電線
　２　　　端子金具
　３　　　電気接触部
　４　　　電線接続部
　４１　　バレル片
　４２　　セレーション部
　４４　　止水部
　４５　　平坦面
　Ｋ１　　下型（金型）
　Ｋ２　　上型（金型）
　Ｓ１　　第一成形面（直線部）
　Ｓ２　　第二成形面（直線部）
　Ｓ３　　第三成形面（直線部）
　Ｗ　　　電線
　Ｗ１　　芯線 DESCRIPTION OF SYMBOLS 1 Electric wire with a terminal 2 Terminal metal fitting 3 Electric contact part 4 Electric wire connection part 41 Barrel piece 42 Serration part 44 Water stop part 45 Flat surface K1 Lower mold (mold)
K2 Upper mold (mold)
S1 First molding surface (straight line part)
S2 Second molding surface (straight section)
S3 Third molding surface (straight line part)
W electric wire W1 core wire

Claims (2)

  1. 　前方からの相手方端子と接続される電気接触部と、
    　該電気接触部よりも後方側にて電線と接続される電線接続部と、を備え、
    　前記電線接続部は、
    　前記電線の先端部を覆って加締めにより該電線と圧着されるバレル片と、
    　前記バレル片の内面に形成されて前記電線の芯線と接続されるセレーション部と、
    　前記バレル片の内面に設けられて前記電線との隙間を塞ぐ止水部と、を備え、
    　前記バレル片は、加締められることで平坦面を有した断面角筒状に形成されていることを特徴とする端子金具。     An electrical contact that is connected to the mating terminal from the front;
    An electric wire connecting portion connected to the electric wire on the rear side of the electric contact portion, and
    The wire connecting portion is
    A barrel piece that covers the tip of the wire and is crimped to the wire by crimping;
    A serration part formed on the inner surface of the barrel piece and connected to the core of the electric wire;
    A water stop portion provided on the inner surface of the barrel piece and closing a gap with the electric wire,
    The barrel piece is formed into a rectangular tube section having a flat surface by being crimped.
  2. 　請求項１に記載の端子金具を電線に圧着して端子付き電線を製造するための製造方法であり、
    　前記バレル片の内面に前記止水部を形成し、
    　直線部を有した金型を用いて前記バレル片を加締めることで、該バレル片を平坦面を有した角筒状に変形させて前記電線の先端部を覆うとともに、前記止水部を前記電線に密着させることを特徴とする端子付き電線の製造方法。     A manufacturing method for manufacturing a terminal-attached electric wire by crimping the terminal fitting according to claim 1 to an electric wire,
    Forming the water stop on the inner surface of the barrel piece;
    By caulking the barrel piece using a mold having a straight portion, the barrel piece is deformed into a rectangular tube shape having a flat surface to cover the tip of the electric wire, and the water stop portion is A method for producing an electric wire with a terminal, wherein the electric wire is in close contact with the electric wire.
PCT/JP2014/056881 2013-03-19 2014-03-14 Terminal fitting and method for producing terminal-equipped electric wire WO2014148381A1 (en)

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JP6378919B2 (en) * 2013-08-26 2018-08-22 矢崎総業株式会社 Connection structure of crimp terminal to wire
JP6326035B2 (en) 2015-12-16 2018-05-16 矢崎総業株式会社 Crimp terminal
JP6307059B2 (en) * 2015-12-16 2018-04-04 矢崎総業株式会社 Crimp terminal
JP6422851B2 (en) 2015-12-16 2018-11-14 矢崎総業株式会社 Crimping terminal manufacturing method
JP6279540B2 (en) 2015-12-16 2018-02-14 矢崎総業株式会社 Crimp terminal
JP6423783B2 (en) 2015-12-16 2018-11-14 矢崎総業株式会社 Crimp terminal
JP6367785B2 (en) 2015-12-16 2018-08-01 矢崎総業株式会社 Electric wire with terminal and terminal crimping device

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