WO2013137429A1 - 端子及び端子付き電線 - Google Patents
端子及び端子付き電線 Download PDFInfo
- Publication number
- WO2013137429A1 WO2013137429A1 PCT/JP2013/057385 JP2013057385W WO2013137429A1 WO 2013137429 A1 WO2013137429 A1 WO 2013137429A1 JP 2013057385 W JP2013057385 W JP 2013057385W WO 2013137429 A1 WO2013137429 A1 WO 2013137429A1
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- Prior art keywords
- terminal
- wire
- core wire
- electric wire
- bottom plate
- Prior art date
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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
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
- H01R13/633—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only
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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
- H01R4/20—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 using a crimping sleeve
- H01R4/203—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 using a crimping sleeve having an uneven wire-receiving surface to improve the contact
- H01R4/206—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 using a crimping sleeve having an uneven wire-receiving surface to improve the contact with transversal grooves or threads
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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
- H01R4/20—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 using a crimping sleeve
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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
- H01R4/58—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 characterised by the form or material of the contacting members
- H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
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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
Definitions
- the present invention relates to a terminal and an electric wire with a terminal.
- a terminal-attached electric wire in which a terminal is attached to a core wire terminal where the electric wire is exposed is known.
- the terminal is provided with a plate-like barrel, and the barrel is crimped (clamped) so as to be wound around the core wire, whereby electrical connection between the terminal and the core wire is achieved. .
- An oxide film may be formed on the surface of the core wire where the terminal is crimped.
- This oxide film is a cause of increasing the electrical resistance between the core wire and the terminal and the electrical resistance between the individual wires constituting the core wire. Therefore, as shown in Patent Document 1, when the terminal is attached to the core wire, the barrel is wound around the core wire with a high pressure to destroy the oxide film so as to be crushed. When the oxide film is broken, a new core surface (new surface) that is not oxidized appears from the lower side. The new surface is used for electrical connection between the core wire and the terminal, thereby reducing the above-described electrical resistances.
- the barrel is wound around the core wire at a high pressure so that a new surface is formed, the core wire is highly compressed and thinned, and there is a possibility that the core wire may be cut (wire breakage).
- the core wire elementary wire
- the problem of (cut) is becoming more serious. Therefore, as shown in Patent Document 1, the barrel is wound around the core wire with a high pressure so that only a portion disposed on the front side of the core wire terminal is ensured to have a high electrical connection (low electrical resistance). ing.
- the barrel at the rear side of the barrel is at a lower pressure than the front side so that the mechanical strength (particularly the tensile strength) of the electric wire with terminal is secured while suppressing breakage of the core wire and the like. It is wound around the core wire.
- On the front side of the barrel there is a portion that is thicker than the rear side (the portion where the extended piece is folded back), and that portion is raised toward the inner side (core wire side) .
- the core wire is tightened by the front side portion of the barrel including the raised portion, the core wire is highly compressed and its thickness (core wire diameter) is reduced.
- the core wire is tightened by the rear portion of the barrel having a small thickness, the core wire is compressed to a low level. Therefore, the thickness (core wire diameter) is not reduced as much as the front side, and the strength of the core wire is ensured. .
- a terminal connected to a core terminal of a grounding wire (hereinafter referred to as a ground terminal) is known.
- This type of ground terminal is used by being firmly attached to a predetermined portion of the vehicle body using a fixing member such as a bolt in a state where it is crimped to a ground wire terminal.
- Patent Document 2 also shows that the grounding wire having such a grounding terminal is recovered from the discarded vehicle for the purpose of recycling (reuse).
- the grounding electric wire is pulled in a state of being hooked on a J-shaped hook attached to a lifting device such as a crane when the disposal vehicle is disassembled.
- the ground terminal is still attached to the vehicle body by the fixing member.
- the ground terminal is broken (cut), and the ground wire is removed from the vehicle side.
- the ground terminal is required to have a configuration (easy disassembly, easy disassembly) that can be easily broken during disassembly.
- the present invention has been completed based on the circumstances as described above, has a good electrical connection performance between the terminal and the electric wire (core wire), and can be easily broken at the time of disassembly, And it aims at providing the terminal utilized for it.
- the electric wire with a terminal of the present invention is an electric wire with a terminal including an electric wire including a core wire with an exposed end, and a terminal that is crimped to the end of the core wire and can be connected to a mating side, and the terminal is loaded with the core wire.
- the bottom plate so as to be sandwiched between the rear terminal portion having an easily breakable portion to be broken at the time of dismantling, a first fixing portion extending in the axial direction from the easily breakable portion, and the bottom plate portion and the core wire Attached to the core wire together with the wire barrel portion and fixed to the first fixing portion in such a manner that it is placed on the first fixing portion.
- the second fixed portion and the second fixed portion Extending axially and a front terminal portion and a connection portion connected to the other side.
- the easily breakable portion is broken so that the bottom plate portion and the first fixing portion are separated from each other. Is done.
- the easily breakable portion may include a hole portion or a notch portion.
- the front terminal portion has a relay portion that relays between the auxiliary crimping portion and the second fixing portion and is overlapped with the easily breakable portion.
- the auxiliary crimping portion has a shape along the circumferential direction of the core wire, and when the wire barrel portion is crimped to the core wire, the auxiliary wire crimping portion partially grips the core wire. May be.
- the second fixing part of the front terminal is fixed to the first fixing part of the rear terminal so that the auxiliary crimping part and the easily breakable part are close to each other. There may be.
- the terminal may be a ground terminal.
- the terminal of the present invention is a terminal that is crimped to the end of the core wire of the electric wire including the core wire with the terminal exposed, and is connectable to the mating side, and is a side from both ends of the bottom plate portion on which the core wire is placed
- a pair of wire barrel portions that are respectively crimped so as to be wound around the core wire on the bottom plate portion, an easily breakable portion that extends in the axial direction from the bottom plate portion and is broken at the time of disassembly, and the easy
- a rear terminal portion having a first fixing portion extending in the direction from the breaking portion, and placed on the bottom plate portion so as to be sandwiched between the bottom plate portion and the core wire, together with the wire barrel portion,
- An auxiliary crimping part that is crimped to a core wire and partially compresses the core wire, a second fixing part that is fixed to the first fixing part in a form that is placed on the first fixing part, and the second fixing It extends in the axial direction from the part and is
- the present invention it is possible to provide a terminal-attached electric wire that can be easily broken at the time of disassembly and a terminal used in the electric wire while having good electrical connection performance between the terminal and the electric wire (core wire).
- FIG. 1 is a top view of a terminal-attached electric wire according to Embodiment 1 (1) of the present invention.
- FIG. 2 is an exploded perspective view of the terminal.
- FIG. 3 is a perspective view of the terminal.
- FIG. 4 is a top view of the rear terminal portion.
- FIG. 5 is an explanatory view schematically showing a process of crimping the auxiliary crimping portion together with the wire barrel portion to the core wire using the crimping device.
- 6 is a cross-sectional view taken along line AA in FIG. 7 is a cross-sectional view taken along line BB in FIG.
- FIG. 8 is an explanatory view schematically showing a terminal-attached electric wire separated into a front part and a rear part with an easily breakable part as a boundary during disassembly.
- FIG. 9 is an explanatory view schematically showing the back side of the electric wire with terminal shown in FIG.
- FIG. 10 is an exploded perspective view of a terminal in the first embodiment (2).
- FIG. 11 is a perspective view of a terminal in the first embodiment (2).
- FIG. 12 is a plan view showing an electric wire with terminal according to the second embodiment of the present invention.
- FIG. 13 is an exploded perspective view showing a terminal.
- FIG. 14 is a perspective view showing a terminal.
- FIG. 17 is a cross-sectional view taken along the line CC in FIG. 18 is a cross-sectional view taken along the line DD in FIG.
- FIG. 19 is a side view showing a terminal-attached electric wire.
- FIG. 20 is a perspective view showing a state where the locking portion is expanded and deformed during disassembly.
- FIG. 21 is a perspective view showing a state in which the terminals are separated. 22 is a cross-sectional view taken along line EE in FIG.
- FIG. 1 is a top view (plan view) of a terminal-attached electric wire 10 according to an embodiment (Embodiment 1 (1)) of the present invention.
- the electric wire with terminal 10 will be described with the right side in FIG. 1 as the front side (front) and the left side as the rear side (rear).
- the terminal-attached electric wire 10 includes an electric wire 13 including a core wire 11 whose end (terminal) is exposed, and a terminal (ground terminal) 20 that is crimped to the end of the core wire 11.
- the electric wire 13 includes a core wire 11 formed by twisting a plurality of fine metal wires (element wires), and an insulating coating 12 made of synthetic resin that covers the outer periphery of the core wire 11.
- the core wire 11 is made of a metal material such as aluminum, an aluminum alloy, copper, or a copper alloy.
- the core wire 11 (element wire) is made of aluminum, and its cross-sectional area is about 12 mm 2 .
- FIG. 2 is an exploded perspective view of the terminal 20, and FIG. 3 is a perspective view of the terminal 20.
- the terminal 20 will be described with the upper side in FIGS. 2 and 3 as the inner side and the lower side as the outer side.
- the terminal 20 is composed of two types of parts. One component is the front terminal portion 21 disposed on the front side, and the other component is the rear terminal portion 22 disposed on the rear side.
- the front terminal portion 21 and the rear terminal portion 22 constituting the terminal 20 are each obtained by stamping a metal plate material into a predetermined shape and pressing it into a predetermined shape.
- plate material utilized for the terminal 20 the thing made from copper or a copper alloy is utilized, for example.
- the plate material may be plated with tin, nickel, or the like as necessary.
- a copper plate material plated with tin is used as the material of the terminal 20 (the material of the front terminal portion 21 and the rear terminal portion 22).
- the front terminal portion 21 includes a connection portion 23, a second fixing portion 24, a relay portion 25c, and an auxiliary crimping portion 25. Further, the rear terminal portion 22 includes a bottom plate portion 26, a wire barrel portion 27, an easily breakable portion 28, and a first fixing portion 29. First, the rear terminal portion 22 will be described in detail.
- FIG. 4 is a top view of the rear terminal portion 22.
- the rear terminal portion 22 generally has a shape extending in the front-rear direction (length direction, axial direction of the electric wire 13 (core wire 11), etc.).
- the thickness (plate thickness) of the rear terminal portion 22 is about 0.8 mm, and the developed length (length in the front-rear direction) is about 22.0 mm.
- the bottom plate portion 26 provided in the rear terminal portion 22 has a plate shape extending in the front-rear direction (axial direction), and is a portion on which the exposed end of the core wire 11 of the electric wire 13 is placed.
- the end portion of the electric wire 13 that is behind the core wire 11 and covered with the insulating coating 12 is also placed on the bottom plate portion 26.
- wire barrel portions 27, 27 each having a pair of plate pieces extending laterally are provided.
- the wire barrel portions 27, 27 are portions that are wound around the core wire 11 placed on the bottom plate portion 26 (a shape that embrace the core wire 11) and are crimped to the core wire 11.
- Each of the wire barrel portions 27 and 27 has a substantially rectangular shape, and in a state before being crimped to the core wire 11, as shown in FIGS. 2 and 3, while facing each other with a space therebetween, the bottom plate portion It has a shape rising from each end of 26.
- insulation barrel portions 30, 30 made of a pair of plate-like pieces extending laterally from both ends of the bottom plate portion 26, respectively.
- the insulation barrel portions 30, 30 are portions to be crimped to the electric wires 13 so as to hold the electric wires 13 placed on the bottom plate portion 26.
- Each barrel portion 30, 30 has a generally elongated rectangular shape (strip shape), and in a state before being crimped to the electric wire 13, as shown in FIG. 2 and FIG. While facing each other, it forms a shape rising from each end portion of the bottom plate portion 26.
- a plurality of groove portions 31 are formed so as to cross the bottom plate portion 26 from one wire barrel portion 27 to the other wire barrel portion 27. Yes.
- the groove portions 31 are arranged in a state of being spaced apart from each other in the front-rear direction (axial direction), and an uneven shape (serration) is formed on the surface (inner surface) 32 of the bottom plate portion 26 and the wire barrel portion 27.
- a portion that includes the bottom plate portion 26 and the wire barrel portion 27 and that is crimped to the core wire 11 to hold the core wire 11 may be particularly referred to as a core wire holding portion 33.
- An easily breakable portion 28 is extended on the front side of the bottom plate portion 26. And the 1st fixing
- the easily breakable portion 28 is a portion connecting the bottom plate portion 26 and the first fixing portion 29.
- a circular hole 28 a is provided inside the easily breakable portion 28, and the easily breakable portion 28 is located between the bottom plate portion 26 and the first fixing portion 29 with the hole 28 a sandwiched inside. Are connected.
- the width of the easily breakable portion 28 (the width in the short direction of the rear terminal portion 22) of the portion connecting these is narrower than that of the bottom plate portion 26 and the first fixing portion 29.
- the easily breakable portion 28 has mechanical strength (tensile strength) that can withstand normal use of the terminal-attached electric wire 10.
- the easily breakable portion 28 is a portion to be broken when the terminal-attached electric wire 10 is disassembled. At the time of disassembly, when the wire 13 of the terminal-attached electric wire 10 in a state where the connection portion 23 is fixed by bolting or the like is pulled, a larger force than that in normal use is applied to the electric wire 10 with terminal (terminal 20). The easily breakable portion 28 is broken (divided) so that the bottom plate portion 26 and the first fixing portion 29 are separated (separated) from each other.
- the hole portion 28 a provided in the easily breakable portion 28 has a shape in which a part of the rear side enters the bottom plate portion 26 side.
- a part of the front side of the hole portion 28a has a shape that enters the first fixed portion 29 side.
- the first fixing portion 29 is disposed at the tip of the rear terminal portion 22 and is a portion fixed to the second fixing portion 24 provided in the front terminal portion 21 in an overlapped state.
- the first fixing portion 29 is fixed to the second fixing portion 24, the rear terminal portion 22 and the front terminal portion 21 are connected to each other, and one terminal 20 is obtained.
- the first fixing portion 29 includes a main body portion 29b having a generally plate shape and a pair of holding portions 29a and 29a each extending in a lateral direction from both ends of the main body portion 29b.
- fixed part 29 is fixed with the 2nd fixing
- the second fixing portion 24 is placed on the inner surface of the main body portion 29b, and the holding portions 29a and 29a are arranged on the main body portion 29b side so as to embrace the second fixing portion 24 in the mounted state. And is crimped (crimped) to the second fixing portion 24.
- each of the holding portions 29a, 29a in a state before being bent has a shape of rising from both ends of the main body portion 29b while facing each other with a space therebetween, as shown in FIGS.
- the front terminal portion 21 generally has a shape extending in the front-rear direction (length direction, axial direction of the electric wire 13 (core wire 11), etc.).
- the thickness (plate thickness) of the front terminal portion 21 is about 0.8 mm, and the developed length (length in the front-rear direction) is about 15.8 mm.
- An auxiliary crimping portion 25 is provided at the rear end of the front terminal portion 21.
- the auxiliary crimping portion 25 is placed on the front side of the bottom plate portion 26 included in the rear terminal portion 22 and is a portion that is crimped to the core wire 11 together with the wire barrel portions 27 and 27.
- the portion of the core wire holding portion 33 in which the auxiliary crimping portion 25 is arranged is a portion that selectively (partially) highly compresses the tip side portion of the core wire 11 in the axial direction.
- the auxiliary crimping portion 25 of the present embodiment has an elongated shape along the circumferential direction of the core wire 11.
- the length of the auxiliary crimping portion 25 (the length along the circumferential direction of the core wire 11 and the length of the front terminal portion 21 in the short direction) is shorter than the circumferential length of the core wire 11 before and after compression. .
- the auxiliary crimping portion 25 is a first auxiliary crimping portion 25a that is placed on the bottom plate portion 26, and a second auxiliary crimping portion 25a that extends to both ends of the first auxiliary crimping portion 25a and extends to the inside of the wire barrel portions 27 and 27, respectively.
- Auxiliary crimping portions 25b and 25b are provided.
- the auxiliary crimping portion 25 in a state before being crimped to the core wire 11 is configured such that the second auxiliary crimping portions 25 b and 25 b face each other while being spaced apart from each other.
- Each has a shape rising from the end of 25a.
- the auxiliary crimping portion 25 is substantially U-shaped.
- the auxiliary crimping portion 25 is accommodated in the core wire holding portion 33 such that the position of the front edge thereof substantially coincides with the position of the front edge of the wire barrel portion 27.
- compression-bonding part 25 is mounted on the inner surface of the baseplate part 26 in the form pinched
- FIG. When the auxiliary crimping portion 25 is placed on the bottom plate portion 26, the auxiliary crimping portion 25 rises inward (core wire 11 side) from the surface 32 of the core wire holding portion 33. That is, by placing the auxiliary crimping portion 25 on the surface 32 of the core wire holding portion 33, the thickness of the core wire holding portion (the bottom plate portion 26 and the wire barrel portion 27) 33 on the placed portion is increased (thickened). Can do.
- the auxiliary crimping portion 25 when the auxiliary crimping portion 25 is crimped to the core wire 11 together with the wire barrel portion 27, the auxiliary crimping portion 25 grips the peripheral surface on the front side of the core wire 11 (holding). To be) shape.
- the outer surface of the auxiliary crimping portion 25 has a shape facing a part of the groove portion 31 formed on the surface 32 of the core wire holding portion 33. Further, the outer surface of the auxiliary crimping portion 25 is also a portion that covers a part of the hole 28 a that has entered the bottom plate portion 26.
- a substantially plate-shaped relay part 25c is provided toward the front.
- the relay portion 25 c is a portion that relays between the auxiliary crimping portion 25 and the second fixing portion 24.
- the relay portion 25 c connects (relays) the auxiliary crimping portion 25 and the second fixing portion 24 to adjust the position of the auxiliary crimping portion 25 placed on the bottom plate portion 26.
- the relay portion 25 c is a portion that is overlapped (addressed) to the easily breakable portion 28 of the rear terminal portion 22, and has a function of reinforcing the easily breakable portion 28.
- the relay part 25c is overlaid on the easily breakable part 28 so as to cover (close) most of the hole part 28a.
- the second fixing portion 24 is disposed on the front side of the auxiliary crimping portion 25 and extends from the relay portion 25c toward the front side.
- fixed part 24 is a part fixed in the state mounted on the inner surface of the 1st fixing
- fixed part 24 has comprised flat form, and the connection part 23 is further extended in the front side.
- the connecting portion 23 is a portion arranged at the tip of the terminal 20 and is a portion fixed by bolting or the like to a counterpart side such as a predetermined part of the vehicle body.
- the connecting portion 23 has a flat plate shape as a whole, and has a shape in which the front side is larger than the rear side. And the penetration hole 23a in which fixing members, such as a volt
- the terminal 20 is obtained.
- the second fixing portion 24 of the front terminal portion 21 in a state in which the connection portion 23 faces frontward is at the tip of the rear terminal portion 22. 1 It mounts, aligning with respect to the fixing
- the auxiliary crimping portion 25 at the rear end of the front terminal portion 21 is also aligned so as to be disposed at a predetermined position of the bottom plate portion 26 of the front terminal portion 21.
- the pair of holding portions 29a and 29a included in the first fixing portion 29 are bent using a predetermined pressure bonding device, and the holding portions 29a and 29a are pressure-bonded to the second fixing portion 24 (caulking). ). Then, the terminal 20 of the state before being attached to the electric wire 13 as shown in FIG. 3 is obtained.
- FIG. 5 is an explanatory view schematically showing a process of crimping the auxiliary crimping portion 25 to the core wire 11 together with the wire barrel portions 27 and 27 using the crimping device 40.
- a predetermined crimping device 40 as shown in FIG. 5 is used.
- the crimping device 40 includes an anvil 41 disposed on the lower side of FIG. 5 and a crimper 42 disposed above the anvil 41.
- the terminal 20 in a state where the core wire 11 (the electric wire 13) is placed on the bottom plate portion 26 is disposed.
- the front side part of the core wire 11 is mounted on the auxiliary
- the crimper 42 is lowered toward the anvil 41 side, the crimper 42 is connected to the anvil 41 with the terminal 20. And the core wire 11 terminal is pinched. Then, it crimps
- the auxiliary crimping portion 25 is crimped to the core wire 11 together with the wire barrel portions 27 and 27 as shown in FIG.
- each insulation barrel 30 and 30 is crimped
- the electric wire 10 with a terminal as shown in FIG. 1 is obtained.
- the compressibility of the core wire 11 is different between the front side portion 33a and the rear side portion 33b.
- the front side portion 33a (the portion on the connection portion 23 side) of the core wire holding portion 33 is provided with an auxiliary crimping portion 25 on the inner side, and this front side portion 33a is more core than the rear side portion 33b of the core wire holding portion 33. 11 is highly compressed.
- FIG. 6 is a cross-sectional view taken along line AA in FIG. 1
- FIG. 7 is a cross-sectional view taken along line BB in FIG.
- FIG. 6 shows a cross-sectional structure of the front side portion 33a of the core wire holding portion 33 in which the auxiliary crimping portion 25 is arranged.
- FIG. 7 shows a cross-sectional structure of the rear portion 33b of the core wire holding portion 33 where the auxiliary crimping portion 25 is not disposed.
- the diameter (outer diameter, circumferential length) of the core wire holding portion 33 is set to be substantially the same in the front side portion 33a and the rear side portion 33b of the core wire holding portion 33, the inner diameter of the core wire holding portion 33 is
- the side part 33a is smaller than the rear side part 33b by the amount provided with the auxiliary pressure bonding part 25. Therefore, the front side portion 33a provided with the auxiliary pressure bonding part 25 can press (clamp) the peripheral surface of the core wire 11 with a higher pressure than the rear side portion 33b. As a result, the core wire 11 inside the front portion 33a is thinner than the core wire 11 inside the rear portion 33b.
- the compression rate of the core wire 11 inside the front portion 33a is set to about 30 to 50%, more preferably about 35 to 45%.
- the compression rate of the core wire 11 is (cross-sectional area of the core wire after compression) / (cross-sectional area of the core wire before compression) ⁇ 100 (%). That is, the smaller the value of the compression rate, the higher the core wire 11 is compressed.
- the compression rate in the front side portion 33a is set to such a value, the oxide film formed on the surface of the core wire 11 is easily destroyed and the new surface is reliably exposed from the lower side of the oxide film. It becomes easy to be done.
- the electrical resistance between the core wire 11 and the terminal 20 (core wire holding portion 33) and the electrical resistance between each of the strands constituting the core wire 11 are reduced and good between these. Electrical connection performance is ensured.
- the core wire 11 inside the front side portion 33a is fixed (gripped) by the auxiliary crimping portion 25 along the circumferential direction of the core wire 11.
- the compression rate of the core wire 11 inside the rear portion 33b is set to 60 to 90%, more preferably about 70 to 80%.
- the compression rate in the rear side portion 33b is set to such a value, the core wire 11 is compressed lower than the front side portion 33a, so that the core wire 11 is cut (the strand of the wire constituting the core wire 11). Cutting) is suppressed.
- good mechanical strength (tensile strength) of the core wire 11 is ensured, and as a result, good holding force of the core wire 11 by the terminal 20 (core wire holding portion 33) is ensured.
- the favorable electrical connection performance between the core wire 11 and the terminal 20 (core wire holding
- the electric wire with terminal 10 of the present embodiment is used (usually used) in a state of being wired in a vehicle as a so-called ground wire.
- a terminal 20 provided at one end of the terminal-attached electric wire 10 is fixed to a predetermined portion of the vehicle body, which is the counterpart of the terminal-attached electric wire 10, by bolting.
- a fixing bolt (not shown) firmly fixes the terminal 20 to the vehicle body in a state of being inserted into the insertion hole 23 a in the connection portion 23.
- the connecting portion 23 of the terminal 20 is firmly sandwiched between the head portion (not shown) of the bolt and the vehicle body.
- the other end of the electric wire 10 with a terminal is connected to the predetermined apparatus (not shown) mounted in the vehicle.
- the electric wire with terminal 10 has a structure with easy disassembly (easy disassembly) in addition to the electrical connection performance described above. The contents will be described below.
- the terminal-attached electric wire 10 is collected from the discarded vehicle for the purpose of recycling (reuse) after the normal use is finished.
- the electric wire with terminal 10 is pulled in a state where the electric wire 13 portion is hooked on a J-shaped hook attached to a lifting device such as a crane.
- a large force exceeding the allowable range in normal use is applied to the electric wire with terminal 10 (particularly, the terminal 20).
- the connecting portion 23 when the connecting portion 23 is fixed to the vehicle body by bolting, the electric wire 13 is pulled rearward (left side in FIG. 1) while being hooked on the hook.
- the easily breakable portion 28 of the terminal 20 crimped to the core wire 11 is broken (cut), and the electric wire 13 is torn off from the vehicle body side.
- the easily breakable portion 28 When the easily breakable portion 28 is broken, the easily breakable portion 28 serves as a boundary, and the terminal-attached electric wire 10 includes a front side portion 50 (a portion on the connection portion 23 side) and a rear side portion 60 (a portion on the wire 13 side). ) And dismantled.
- FIG. 8 is an explanatory view schematically showing the terminal-attached electric wire 10 separated into the front portion 50 and the rear portion 60 with the easily breakable portion 28 as a boundary during disassembly
- FIG. 9 is shown in FIG. It is explanatory drawing which represented the back side of the electric wire 10 with a terminal typically.
- the terminal-attached electric wire 10 is disassembled, the terminal-attached electric wire 10 is separated into a front portion 50 including the connecting portion 23 and a rear portion 60 including the electric wire 13. .
- the terminal 20 is broken (cut) so that the easily breakable portion 28 is divided into the bottom plate portion 26 side and the first fixing portion 29 side.
- the easily breakable portion 28 is set to have the narrowest (thin) width (the width in the short direction of the terminal 20) in the terminal 20, and is the weakest portion in terms of strength.
- the terminal 20 has a strength (tensile strength) that does not cause the easily breakable portion 28 to be broken during normal use.
- the core wire 11 is also cut at a portion (or its vicinity) highly compressed by the auxiliary crimping portion 25 as a boundary, and the front portion 50 and the rear portion Divided into 60.
- the front portion 50 mainly includes the front terminal portion 21, the first fixing portion 29 fixed to the second fixing portion 24 of the front terminal portion 21, and the core wire 11 held (held) by the auxiliary crimping portion 25. It consists of a cut piece.
- the first fixing portion 29 is fixed to the second fixing portion 24 of the front terminal portion 21 even after the easily breakable portion 28 is broken.
- the rear portion 60 mainly includes the rear terminal portion 22 remaining after the easily breakable portion 28 is broken and the electric wire 13 to which the rear terminal portion 22 is attached.
- compression-bonding part 25 contained in the front side part 50 is a part (core wire holding
- the auxiliary crimping portion 25 that is a part of the front terminal portion 21 is a core wire holding portion 33 (wire barrel portion 27 and bottom plate portion 26) that has a substantially cylindrical shape.
- the auxiliary crimping part 25 is torn off a part (front side part) of the core wire 11 and removed from the rear side part 60 (electric wire 13 side) while holding the core wire cut piece.
- the electric wire with terminal 10 of the present embodiment is configured such that the easily breakable portion 28 of the terminal 20 is broken, and the front end portion (or the vicinity thereof) of the core wire 11 that is highly compressed is cut off. It is easily disassembled into the part 50 and the rear part 60.
- the position of the auxiliary crimping portion 25 and the position of the easily breakable portion 28 are in a state of approaching (approaching) to each other. That is, the broken portion of the terminal-attached electric wire 10 is in the vicinity of the portion where the core wire 11 is crimped (core wire crimping portion 33).
- the disassembly property of the electric wire 10 with a terminal is improved by setting the position of the auxiliary crimping part 25 and the position of the easily breakable part 28.
- the terminal 20 is set to be broken not near the connection portion 23 but near the portion (core wire crimping portion 33) where the core wire 11 is crimped. Therefore, it is not necessary to increase the size of the connecting portion 23 unnecessarily (for example, in order to secure a portion for providing the easily breakable portion). Therefore, even if the attachment location of the vehicle body is narrow, the electric wire with terminal 10 of the present embodiment can be reliably attached to the attachment location while providing easy disassembly. Further, the easily breakable portion is not sandwiched between the fixing member and the attachment portion depending on the size of the fixing member such as a bolt, and the easily breakable portion does not function.
- connection portions 23 of the plurality of terminal-attached electric wires 10 are fixed by bolting in a state where the bolts are stacked while being inserted into the respective insertion holes 23a, the connection portions 23 interfere with each other, The easy disassembly of the electric wire with terminal 10 is not impaired.
- the terminal-attached electric wire 10 can be selectively removed at the time of disassembly. For example, it is also possible to select and remove only the electric wire with terminal 10 that needs to be removed.
- the easily breakable part 28 is not arrange
- the easily breakable portion 28 is reinforced by being assigned to a part of the front terminal portion 21 (relay portion 25c). For this reason, in the electric wire with terminal 10 of the present embodiment, an increase in the thickness of the connection portion 23 is suppressed. As a result, for example, even if the connection parts 23 of the plurality of terminal-attached electric wires 10 are attached to a predetermined location of the vehicle body in a stacked state, an increase in size of the attachment part can be suppressed.
- the electric wire with terminal 10 (and the terminal 20) of the present embodiment has a good electrical connection performance between the terminal 20 and the electric wire 13 (core wire 11) and can be easily broken at the time of disassembly. It has.
- FIG. 10 is an exploded perspective view of the terminal 20A in the first embodiment (2)
- FIG. 11 is a perspective view of the terminal 20A in the first embodiment (2).
- the terminal 20A of the present embodiment is a ground terminal similarly to the first embodiment (1), and is used by being crimped to the end of the electric wire 13 similar to the first embodiment (1).
- the terminal 20A of the present embodiment includes a front terminal portion 21A and a rear terminal portion 22A.
- the configuration of the front terminal portion 21A of the present embodiment is the same as that of the front terminal portion 21 of the first embodiment (1).
- the configuration of the rear terminal portion 22A of the present embodiment is the rear terminal portion 22A of the first embodiment (1) except that the first fixing portion 29A is not provided with the holding portion 29a of the first embodiment (1). Is the same.
- the first fixing portion 29A of the rear terminal portion 22A and the second fixing portion 24 of the front terminal portion 21A are performed by pinpoint welding by laser irradiation.
- the terminal 20A may be configured by fixing the first fixing portion 29A of the rear terminal portion 22A and the second fixing portion 24 of the front terminal portion 21A so as to overlap each other by welding.
- the terminal 20A of the present embodiment can also obtain the same technical effect as that of the first embodiment (1).
- An oxide film may be formed on the surface of the core wire where the terminal is crimped.
- This oxide film is a cause of increasing the electrical resistance between the core wire and the terminal and the electrical resistance between the individual wires constituting the core wire. Therefore, as shown in Patent Document 1, when the terminal is attached to the core wire, the barrel is wound around the core wire with a high pressure to destroy the oxide film so as to be crushed. When the oxide film is broken, a new core surface (new surface) that is not oxidized appears from the lower side. The new surface is used for electrical connection between the core wire and the terminal, thereby reducing the above-described electrical resistances.
- a ground terminal connected to a core terminal of a ground wire is known.
- This type of ground terminal is used by being firmly attached to a predetermined portion of the vehicle body using a fixing member such as a bolt in a state where it is crimped to a ground wire terminal.
- Japanese Patent Application Laid-Open No. 2003-132969 also shows that the grounding wire having such a grounding terminal is recovered from the discarded vehicle for the purpose of recycling (reuse).
- the grounding electric wire is pulled in a state of being hooked on a J-shaped hook attached to a lifting device such as a crane when the disposal vehicle is disassembled.
- the ground terminal is still attached to the vehicle body by the fixing member.
- the ground terminal is broken (cut), and the ground wire is removed from the vehicle side.
- the ground terminal is required to have a configuration (easy disassembly, easy disassembly) that can be easily broken during disassembly.
- the technology described in the present specification has been completed based on the above-described circumstances, and has good electrical connection performance between the terminal and the electric wire (core wire) and easily breaks at the time of disassembly. It aims at providing the electric wire with a terminal which can be, and the terminal utilized for it.
- the technology described in the present specification is an electric wire with a terminal, and includes an electric wire provided with a core wire, and a terminal connected to the core wire exposed from a terminal of the electric wire, and the terminal is connected to the core wire.
- the auxiliary pressure-bonding part that extends from the wire barrel part and is crimped to the core wire in a state of being sandwiched between the wire barrel part and the core wire is different from the auxiliary pressure-bonding part from the laminated part.
- connection portion that extends in the direction and is connected to the counterpart member, the extension portion and the laminated portion are locked, and when the force is applied to the electric wire, the extension portion and the laminated portion are engaged with each other.
- the locking portion to be released from the stop, and the locking portion of the laminated portion Is formed between the locked and the locked portion of said auxiliary crimping portion, and a frangible portion for easily broken when a force is applied to the wire.
- the technology described in the present specification is a terminal, a wire barrel part that is crimped to the core wire exposed from an end of an electric wire provided with a core wire, and an extension part that extends from the wire barrel part And a laminated portion overlaid on the extending portion, and the core wire in a state of being extended from the laminated portion toward the wire barrel portion and sandwiched between the wire barrel portion and the core wire.
- Auxiliary crimping portion to be crimped a connection portion extending from the laminated portion in a direction different from the auxiliary crimping portion and connected to the counterpart member, and locking the extending portion and the laminated portion,
- a locking portion that unlocks the extended portion and the laminated portion when a force is applied to the electric wire a locked portion that is locked to the locking portion of the laminated portion, and the auxiliary It is formed between the crimping part and easily breaks when force is applied to the wire.
- the core wire is crimped by the wire barrel portion and the auxiliary crimping portion.
- a core wire is highly crimped compared with the case where it crimps
- the oxide film formed on the surface of the core wire is peeled off, and the metal surface constituting the core wire is exposed.
- the electrical resistance value between the electric wire and the terminal can be lowered.
- the locking between the extending portion and the laminated portion is released. Further, when force is applied to the electric wire, the easily breakable portion breaks. Then, the laminated part which is a member different from the extending part is detached from the extending part.
- the electric wire with a terminal can have a good electrical connection performance between the terminal and the electric wire (core wire) and can be easily broken at the time of disassembly. .
- the core wire includes a low-compression portion that is crimped only by the wire barrel portion, and a high-compression portion that is crimped by both the wire barrel portion and the auxiliary crimping portion and is compressed more than the low-compression portion. It is preferable.
- the holding force between the core wire and the wire barrel portion can be improved in the low compression portion.
- the electrical resistance value between the core wire and the terminal can be reduced.
- the core wire includes a plurality of metal strands, and the compression ratio is defined as ⁇ (cross-sectional area of the conductor after compression) / (cross-sectional area of the conductor before compression) ⁇ ⁇ 100 (%).
- the compression rate of the portion is set to be larger than 50%, the compression rate of the high compression portion is preferably set to be smaller than 50%, more preferably set to 35% or less, 25 % Is further preferably set, and particularly preferably set to 20% or less.
- the oxide film on the core wire can be broken by reducing the compression ratio to less than 50%. Thereby, the electrical resistance value of a core wire and a terminal can be made small. If the compression rate is 35% or less, the surfaces of the strands constituting the core wire are microscopically adhered to each other, so that the electrical resistance value can be reduced. Furthermore, when the compression rate is 25% or less, the wires are macroscopically adhered to each other, so that the electrical resistance value can be further reduced. Furthermore, when the compression ratio is 20% or less, the strands can be securely adhered to each other, and thus the electrical resistance value can be reliably reduced.
- the easily breakable portion is formed in a groove shape.
- the easily breakable portion can be reliably broken at the time of disassembly by a simple configuration in which the easily breakable portion is formed in a groove shape.
- the locking portion is formed in a claw shape extending from both ends of the extension portion to both sides.
- the extension portion and the laminated portion can be locked with a simple configuration in which the locking portion formed in a claw shape is bent. Further, the number of parts can be reduced as compared with the case where the locking portion is formed of a separate member.
- the tapered portion is formed with a taper surface that expands and deforms the locking portion by contacting the locking portion.
- the locking portion can be reliably expanded and deformed during disassembly, and the locking between the extension portion and the laminated portion can be released.
- a terminal-attached electric wire having a good electrical connection performance between a terminal and an electric wire (core wire), which can be easily broken at the time of disassembly, and a terminal used therefor it can.
- FIG. 12 is a plan view of the terminal-attached electric wire 110 according to the second embodiment of the present invention.
- the terminal-attached electric wire 110 includes an electric wire 113 including a core wire 111 with an end (terminal) exposed, and a terminal 120 that is crimped to the end of the core wire 111.
- the terminal 120 is a ground terminal mounted on a vehicle (not shown).
- the electric wire 113 includes a core wire 111 formed by twisting a plurality of metal wires 114 and an insulating coating 112 made of synthetic resin that covers the outer periphery of the core wire 111.
- the core wire 111 is made of a metal material such as aluminum, an aluminum alloy, copper, or a copper alloy. In the case of the present embodiment, the core wire 111 is made of aluminum or an aluminum alloy, and its cross-sectional area is about 12 mm 2 .
- FIG. 13 is an exploded perspective view of the terminal 120
- FIG. 14 is a perspective view of the terminal 120
- the terminal 120 will be described with the upper side in FIGS. 13 and 14 as the inner side and the lower side as the outer side.
- the terminal 120 is composed of two types of parts. One component is the front terminal portion 121 disposed on the front side, and the other component is the rear terminal portion 122 disposed on the rear side.
- the front terminal portion 121 and the rear terminal portion 122 constituting the terminal 120 are each obtained by stamping a metal plate material into a predetermined shape and pressing it into a predetermined shape.
- the plate material used for the terminal 120 examples include metal materials such as copper, copper alloy, aluminum, aluminum alloy, iron, and iron alloy.
- the plate material may be plated with tin, nickel, or the like as necessary.
- a copper alloy plate material plated with tin is used as the material of the terminal 120 (the material of the front terminal portion 121 and the rear terminal portion 122).
- the front terminal portion 121 includes a connection portion 123, a laminated portion 124, an easily breakable portion 126, and an auxiliary crimping portion 125.
- the rear terminal portion 122 includes an extension portion 132, a wire barrel portion 133, an insulation barrel portion 130, and a locking portion 135. First, the rear terminal portion 122 will be described in detail.
- the rear terminal portion 122 generally has a shape extending in the front-rear direction (length direction, axial direction of the electric wire 113 (core wire 111), etc.).
- the thickness (plate thickness) of the rear terminal portion 122 is about 0.8 mm.
- the extending portion 132 provided in the rear terminal portion 122 has a plate shape extending along the front-rear direction (axial direction).
- the extension part 132 is extended from the wire barrel part 133 to which the core wire 111 is crimped.
- the wire barrel part 133 is formed of a pair of plate pieces extending sideways.
- the wire barrel portion 133 is configured to be crimped to the core wire 111 in a shape that wraps around the core wire 111 (a shape that embraces the core wire 111).
- an insulation barrel portion 130 is provided behind the wire barrel portion 133.
- the insulation barrel part 130 is a part to be held on the insulating coating 112 of the electric wire 113 so as to hold the electric wire 113.
- a plurality of groove portions 131 are formed on the surface (inner surface) on the side where the electric wire 113 (core wire 111) is placed, extending in a direction orthogonal to the axial direction of the electric wire 113.
- the groove portions 131 are arranged in a state of being spaced apart from each other in the front-rear direction (axial direction).
- a pair of locking portions 135 having a claw shape extending laterally are formed on the front side of the extending portion 132.
- the pair of locking portions 135 are bent on the stacked portion 124 overlaid on the extending portion 132, thereby locking the extending portion 132 and the stacked portion 124.
- the locking portion 135 is expanded and deformed to release the locking between the extending portion 132 and the laminated portion 124.
- the front terminal portion 121 generally has a shape extending in the front-rear direction (length direction, axial direction of the electric wire 113 (core wire 111), etc.).
- the thickness (plate thickness) of the front terminal portion 121 is about 0.8 mm.
- An auxiliary crimping portion 125 is provided at the rear end of the front terminal portion 121.
- the auxiliary crimping part 125 is placed so as to overlap the front side of the wire barrel part 133 included in the rear terminal part 122 and is a part to be crimped to the core wire 111 together with the wire barrel part 133.
- the portion where the core wire 111 is crimped by the wire barrel portion 133 and the auxiliary crimping portion 125 is a portion that selectively (partially) highly compresses the front side portion of the core wire 111 in the axial direction.
- the auxiliary crimping part 125 of the present embodiment has an elongated shape along the circumferential direction of the core wire 111.
- the length of the auxiliary crimping portion 125 (the length along the circumferential direction of the core wire 111 and the length of the front terminal portion 121 in the short direction) is shorter than the circumferential length of the core wire 111 before and after compression. .
- the auxiliary crimping portion 125 has the wire barrel portion so that the position of the edge on the front side substantially coincides with the position of the edge on the front side in the wire barrel portion 133. It is placed on 133. And the auxiliary
- FIG. When the auxiliary crimping part 125 is placed on the wire barrel part 133, the auxiliary crimping part 125 rises inward (core wire 111 side) from the surface of the wire barrel part 133. That is, by placing the auxiliary crimping portion 125 on the surface of the wire barrel portion 133, the thickness of the placed portion can be increased (thickened).
- the auxiliary crimping portion 125 grips the peripheral surface on the front side of the core wire 111 (holding). To be) shape.
- a substantially plate-shaped laminated part 124 is provided toward the front.
- the laminated portion 124 becomes a portion that relays between the auxiliary crimping portion 125 and the connecting portion 123.
- the stacked portion 124 is stacked on the extended portion 132.
- the stacked portion 124 is formed with a locked portion 127 that is locked to the locking portion 135 described above.
- the locked portion 127 has a narrow portion 128 that is narrower than other portions.
- the locking portion 135 described above is bent and caulked to the narrow portion 128.
- the narrow portion 128 formed to be narrow and the other portion of the stacked portion 124 are connected by a tapered surface 129.
- the taper surface 129 comes into contact with the bent engaging portion 135 when a tensile force is applied to the electric wire 113 during disassembly, so that the engaging portion 135 is expanded and deformed.
- an easily breakable portion 126 that is easily broken when a tensile force is applied to the electric wire 113 at the time of disassembly is formed at a position between the locked portion 127 and the auxiliary crimping portion 125.
- the easily breakable portion 126 is formed in a groove shape orthogonal to the axial direction of the electric wire 113. The strength of the easily breakable portion 126 is set so that it easily breaks when a tensile force is applied to the electric wire 113 during disassembly.
- the stacked portion 124 is overlapped with the extending portion 132.
- the easily breakable part 126 is reinforced by the extension part 132 (refer FIG. 16).
- a connecting portion 123 extends in front of the locked portion 127.
- the connection part 123 is a part arranged at the tip of the terminal 120, and is a part fixed by bolting or the like to a counterpart side such as a predetermined part of the vehicle body.
- the connection part 123 has a flat plate shape as a whole, and has a shape in which the front side is larger than the rear side.
- bolt, are penetrated is provided in the front side.
- the terminal 120 is obtained.
- the extension portion at which the stacked portion 124 of the front terminal portion 121 with the connection portion 123 facing forward is at the tip of the rear terminal portion 122. It is mounted while being aligned with respect to 132.
- the auxiliary crimping portion 125 at the rear end of the front terminal portion 121 is also aligned so as to be disposed at a predetermined position of the wire barrel portion 133 of the front terminal portion 121.
- the pair of locking portions 135 formed at the distal ends of the extending portions 132 are bent using a predetermined pressure bonding device, and are crimped (crimped) to the locked portions 127. Then, the terminal 120 of the state before being attached to the electric wire 113 as shown in FIG. 14 is obtained.
- the compressibility of the core wire 111 is different between the front part and the rear part. Since the auxiliary crimping part 125 is provided inside the wire barrel part 133 at the front side (connecting part 123 side), it is more than the other part (rear side part) where the auxiliary crimping part 125 is not arranged.
- the core wire 11 is highly compressed.
- FIG. 17 is a cross-sectional view taken along the line CC of FIG. 12, and FIG. 18 is a cross-sectional view taken along the line DD of FIG.
- FIG. 17 shows a cross-sectional structure of the front side portion of the wire barrel portion 133 where the auxiliary crimping portion 125 is arranged.
- FIG. 18 shows a cross-sectional structure of the rear portion of the wire barrel portion 133 where the auxiliary crimping portion 125 is not disposed. Comparing these, it can be seen that the cross-sectional area of the core wire 111 shown in FIG. 17 is smaller than the cross-sectional area of the core wire 111 shown in FIG.
- the outer shape of the wire barrel portion 133 is set to be substantially the same in the front side portion and the rear side portion of the wire barrel portion 133
- the outer shape of the core wire 111 is the front side portion (see FIG. 17). Is smaller than the rear portion (see FIG. 18) by the amount of the auxiliary crimping portion 125 provided. Therefore, the front side portion provided with the auxiliary crimping portion 125 can press (clamp) the peripheral surface of the core wire 111 with a higher pressure than the rear side portion. As a result, the core wire 111 inside the front portion is thinner than the core wire 111 inside the rear portion.
- the core wire 111 in the front side portion shown in FIG. 17 is a high compression portion 137
- the core wire 111 in the rear side portion shown in FIG. 18 is a low compression portion 136.
- the compression rate of the core wire 111 in the high compression portion 137 is preferably set smaller than 50%, more preferably 35% or less, still more preferably 25% or less, and particularly preferably 20% or less.
- the compression rate of the core wire 111 is (cross-sectional area of the core wire after compression) / (cross-sectional area of the core wire before compression) ⁇ 100 (%). That is, the smaller the value of the compression rate, the higher the core wire 111 is compressed.
- the compression rate in the high compression portion 137 is set to such a value, the oxide film formed on the surface of the core wire 111 is easily destroyed and the new surface is reliably formed from the lower side of the oxide film. It becomes easy to be exposed.
- the electrical resistance between the core wire 111 and the terminal 120 (wire barrel portion 133) and the electrical resistance between the individual wires 114 constituting the core wire 111 are reduced. Good electrical connection performance is ensured.
- the core wire 111 inside the high compression portion 137 is fixed (gripped) along the circumferential direction of the core wire 111 by the auxiliary crimping portion 125.
- the compression rate of the core wire 111 inside the low compression portion 136 is preferably set to be larger than 50%, more preferably 60 to 90%, and particularly preferably 70 to 80%.
- the compression rate in the low compression portion 136 is set to such a value, the core wire 111 is compressed lower than the high compression portion 137, so that the core wire is broken (the wire 114 constituting the core wire 111 Cutting) is suppressed.
- a good mechanical strength (tensile strength) of the core wire 111 is ensured, and as a result, a good holding force of the core wire 111 by the terminal 120 (wire barrel portion 133) is secured.
- the oxide film of the core wire 111 can be destroyed by making the compression rate smaller than 50%. Thereby, the electrical resistance value of the core wire 111 and the terminal 120 can be made small. If the compression rate is 35% or less, the surfaces of the strands 114 constituting the core wire 111 are microscopically adhered to each other, so that the electrical resistance value can be reduced. Furthermore, when the compression rate is 25% or less, the strands 114 adhere macroscopically, so that the electrical resistance value can be further reduced. Furthermore, when the compression rate is 20% or less, the strands 114 can be reliably adhered to each other, and thus the electrical resistance value can be reliably reduced.
- the strands 114 constituting the core wire 111 are rubbed strongly. As a result, the oxide film formed on the surface of the strand 114 is broken, and the metal surface constituting the strand 114 is exposed. When the metal surfaces come into contact with each other, the electrical resistance value between the strands 114 can be reduced. Thereby, the strand 114 located near the center of the core wire can also contribute to the electrical connection with the terminal 120. As a result, the electrical resistance value between the core wire 111 and the terminal 120 can be further reduced.
- the electric wire with terminal 110 of the present embodiment is used (usually used) in a state of being wired in a vehicle as a so-called ground wire.
- the terminal 120 provided at one end of the terminal-attached electric wire 110 is fixed to a predetermined portion of the vehicle body, which is the other side of the terminal-attached electric wire 110, by bolting.
- a fixing bolt (not shown) firmly fixes the terminal 120 to the vehicle body in a state of being inserted into the insertion hole 123 ⁇ / b> A in the connection portion 123.
- the connection portion 123 of the terminal 120 is firmly sandwiched between the head portion (not shown) of the bolt and the vehicle body.
- the other end of the terminal-attached electric wire 110 is connected to a predetermined device (not shown) mounted on the vehicle.
- the electric wire with terminal 110 has a structure with easy disassembly (easy disassembly) in addition to the electrical connection performance described above. The contents will be described below.
- the terminal-attached electric wire 110 is collected from the discarded vehicle for the purpose of recycling (reuse) after the normal use is finished.
- the electric wire with terminal 110 is pulled in a state where the electric wire 113 portion is hooked on a J-shaped hook attached to a lifting device such as a crane.
- a large force exceeding the allowable range in normal use is applied to the electric wire with terminal 110 (particularly, the terminal 120).
- the connecting portion 123 when the connecting portion 123 is fixed to the vehicle body by bolting, if the electric wire 113 is pulled while being hooked on the hook, the electric wire 113 is moved upward in FIG. Pulled on.
- the easily breakable portion 126 formed in the laminated portion 124 is broken. Then, as shown in FIG. 21, with the easily breakable portion 126 as a boundary, the terminal-attached electric wire 110 is divided into a front portion 150 (a portion on the connection portion 123 side) and a rear portion 160 (a portion on the electric wire 113 side). It is demolished to be separated.
- the easily breakable portion 126 of the laminated portion 124 is reinforced from the lower side by the extending portion 132 during normal use. For this reason, the easily breakable portion 126 is not broken by a force applied to the electric wire 113 during normal use.
- the terminal-attached electric wire 110 is easily disassembled into the front side portion 150 and the rear side portion 160 when the locking portion 135 is expanded and the easily breakable portion 126 is broken. Is done.
- the easily breakable portion 28 has a circular hole 28a.
- holes having other shapes such as a triangular shape and a quadrangular shape may be formed.
- a notch may be provided in the easily breakable portion.
- the shape of the easily breakable portion is appropriately set according to the purpose.
- the auxiliary crimping portion 25 may have a shape that does not grip the core wire.
- the core wire may be highly compressed at the time of crimping the core wire, but may be an auxiliary crimping portion having a structure that does not grip the core wire after the crimping. For example, it may be shorter (small U-shaped) than the above embodiment (length in the short direction of the terminal). Even with such a structure, the core wire portion that is highly compressed by the auxiliary crimping portion is easily broken at the time of disassembly.
- the easily breakable portion of the terminal is broken and the auxiliary crimping portion is pulled out from the inside of the core wire holding portion along with the breakage of the core wire.
- the auxiliary crimping portion grips the core wire when crimping the core wire as in the first embodiment (1).
- the auxiliary crimping portion 25 holds the core wire 11 in this way, the electric wire with terminal 10 can be easily disassembled during disassembly more reliably.
- the ground terminal is illustrated, but in other embodiments, a terminal other than the ground terminal may be used.
- a terminal may be a terminal (so-called male terminal or female terminal) that is fitted and connected to a counterpart terminal.
- the electric wire with a terminal for a vehicle is illustrated, but the electric wire with a terminal (and the terminal) of the present invention may be used for other purposes (house, outdoor facility, etc.). Good.
- the terminal-attached electric wire is removed using a crane or the like at the time of dismantling, but the terminal-attached electric wire may be removed manually by an operator.
- the electric wire with a terminal of this invention is provided with the intensity
- the easily breakable portion 126 is formed in a groove shape.
- the easily breakable portion 126 is not limited to this, and the easily breakable portion 126 has a plurality of penetrations arranged in a discrete manner with a predetermined interval. It may be a hole.
- the locking portion 135 is formed in a pair of claws extending laterally from the extending portion 132.
- the front terminal portion 121 and the rear terminal portion 122 may be separate members.
- the locking portion 135 may be formed in an elongated metal plate shape and crimped so as to be wound around the outer periphery of the extending portion 132 and the laminated portion 124.
Landscapes
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
Description
本発明の実施形態1(1)を、図1ないし図9を参照しつつ説明する。図1は、本発明の一実施形態(実施形態1(1))に係る端子付き電線10の上面図(平面図)である。なお、説明の便宜上、図1における右側を先側(前方)とし、その左側を後側(後方)として、端子付き電線10を説明する。端子付き電線10は、図1に示されるように、末端(端末)が露出した芯線11を含む電線13と、芯線11端末に圧着される端子(アース端子)20とを備えている。
次いで、本発明の実施形態1(2)を、図10及び図11を参照しつつ説明する。なお、実施形態1(1)と同じ部分については、実施形態1(1)と同じ符号を付して、その詳細な説明は省略する。図10は、実施形態1(2)における端子20Aの分解斜視図であり、図11は、実施形態1(2)における端子20Aの斜視図である。本実施形態の端子20Aは、実施形態1(1)と同様、アース端子であり、実施形態1(1)と同様の電線13端部に圧着されて用いられる。
従来、芯線を有する電線と、電線の端末から露出した芯線に接続された端子と、を備えた端子付き電線として、特開2010-62097号公報に記載のものが知られている。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
11:芯線
12:絶縁被覆
13:電線
20:端子
21:前方端子部
22:後方端子部
23:接続部
23a:挿通孔
24:第2固定部
25c:中継部
25:補助圧着部
26:底板部
27:ワイヤーバレル部
28:易破断部
28a:孔部
29:第1固定部
29a:保持部
29b:本体部
30:インシュレーションバレル部
31:溝部
32:芯線保持部の表面(内面)
33:芯線保持部
110:端子付き電線
111:芯線
113:電線
114:素線
120:端子
123:接続部
124:積層部
125:補助圧着部
126:易破断部
127:被係止部
129:テーパ面
132:延出部
133:ワイヤーバレル部
135:係止部
136:低圧縮部
137:高圧縮部
Claims (22)
- 端末が露出した芯線を含む電線と、前記芯線の端末に圧着され相手側と接続可能な端子とを備える端子付き電線であって、
前記端子は、
前記芯線が載せられる底板部と、前記底板部の両端から側方にそれぞれ延出され前記底板部上の前記芯線に巻き付くように圧着される一対のワイヤーバレル部と、前記底板部から軸方向に延設され解体時に破断される易破断部と、前記易破断部から軸方向に延設される第1固定部とを有する後方端子部と、
前記底板部と前記芯線との間で挟まれるように前記底板部上に載せられ、前記ワイヤーバレル部と共に前記芯線に圧着されて、前記芯線を部分的に高圧縮する補助圧着部と、前記第1固定部上に載せられる形で前記第1固定部に固定される第2固定部と、前記第2固定部から軸方向に延設され前記相手側と接続される接続部とを有する前方端子部と、を備える端子付き電線。 - 解体時に、前記接続部が前記相手側に接続された状態で前記電線が引っ張られると、前記底板部と前記第1固定部とが互いに離れるように前記易破断部が破断される請求項1に記載の端子付き電線。
- 前記易破断部は、孔部又は切り欠き部を含む請求項1又は請求項2に記載の端子付き電線。
- 前記前方端子部は、前記補助圧着部と前記第2固定部との間を中継すると共に、前記易破断部に重ねられる中継部を有する請求項1ないし請求項3のいずれか一項に記載の端子付き電線。
- 前記補助圧着部は、前記芯線の周方向に沿った形をなしており、前記ワイヤーバレル部と共に前記芯線に圧着されると、前記芯線を部分的に把持する請求項1ないし請求項4のいずれか一項に記載の端子付き電線。
- 前記補助圧着部と、前記易破断部とが互いに近接するように、前記後方端子の前記第1固定部に、前記前方端子の前記第2固定部が固定される請求項1ないし請求項5のいずれか一項に記載の端子付き電線。
- 芯線を備えた電線と、
前記電線の端末から露出する前記芯線に接続された端子と、を備え、
前記端子は、
前記芯線に圧着されるワイヤーバレル部と、
前記ワイヤーバレル部から延出された延出部と、
前記延出部とは別部材であって前記延出部の上に重ねられた積層部と、
前記積層部から前記ワイヤーバレル部に向けて延出されて、前記ワイヤーバレル部及び前記芯線の間に挟まれた状態で前記芯線に圧着された補助圧着部と、
前記積層部から前記補助圧着部とは異なる方向に延出されて相手側部材に接続される接続部と、
前記延出部及び前記積層部を係止すると共に、前記電線に力が加えられた時に前記延出部及び前記積層部の係止が解除される係止部と、
前記積層部のうち前記係止部に係止された被係止部と前記補助圧着部との間に形成されて、前記電線に力が加えられた時に容易に破断する易破断部と、を備えた端子付き電線。 - 前記易破断部は溝状に形成されている請求項7に記載の端子付き電線。
- 前記係止部は前記延長部の先端から両側方に延びる爪状に形成されている請求項7または請求項8に記載の端子付き電線。
- 前記被係止部には前記係止部に当接することで前記係止部を拡開変形させるテーパ面が形成されている請求項7ないし9のいずれか一項に記載の端子付き電線。
- 前記端子が、アース端子からなる請求項1ないし請求項10のいずれか一項に記載の端子付き電線。
- 前記芯線は、前記ワイヤーバレル部のみによって圧着された低圧縮部と、前記ワイヤーバレル部及び前記補助圧着部の双方により圧着されて前記低圧縮部よりも高圧縮された高圧縮部と、を備える請求項1ないし請求項11のいずれか一項に記載の端子付き電線。
- 前記芯線は金属製の複数の素線を備え、
{(圧縮後の導体の断面積)/(圧縮前の導体の断面積)}×100(%)で定義された圧縮率について、前記低圧縮部の圧縮率は50%よりも大きく設定されており、前記高圧縮部の圧縮率は50%よりも小さく設定されている、請求項12に記載の端子付き電線。 - 前記高圧縮部の圧縮率は、35%以下に設定されている請求項13に記載の端子付き電線。
- 前記高圧縮部の圧縮率は、25%以下に設定されている請求項14に記載の端子付き電線。
- 前記高圧縮部の圧縮率は、20%以下に設定されている請求項15に記載の端子付き電線。
- 端末が露出した芯線を含む電線の前記芯線の端末に圧着され、相手側と接続可能な端子であって、
前記芯線が載せられる底板部と、前記底板部の両端から側方にそれぞれ延出され前記底板部上の前記芯線に巻き付くように圧着される一対のワイヤーバレル部と、前記底板部から軸方向に延設され解体時に破断される易破断部と、前記易破断部から前記方向に延設される第1固定部とを有する後方端子部と、
前記底板部と前記芯線との間で挟まれるように前記底板部上に載せられ、前記ワイヤーバレル部と共に前記芯線に圧着されて、前記芯線を部分的に高圧縮する補助圧着部と、前記第1固定部上に載せられる形で前記第1固定部に固定される第2固定部と、前記第2固定部から軸方向に延設され前記相手側と接続される接続部とを有する前方端子部と、を備える端子。 - 芯線を備えた電線の端末から露出する前記芯線に圧着されるワイヤーバレル部と、
前記ワイヤーバレル部から延出された延出部と、
前記延出部の上に重ねられた積層部と、
前記積層部から前記ワイヤーバレル部に向けて延出されて前記ワイヤーバレル部と前記芯線との間に挟まれた状態で前記芯線に圧着される補助圧着部と、
前記積層部から前記補助圧着部とは異なる方向に延出されて相手側部材と接続される接続部と、
前記延出部及び前記積層部を係止すると共に、前記電線に力が加えられた時に前記延出部及び前記積層部の係止が解除される係止部と、
前記積層部のうち前記係止部に係止された被係止部と前記補助圧着部との間に形成されて前記電線に力が加えられた時に容易に破断する易破断部と、を備えた端子。 - 前記補助圧着部は前記ワイヤーバレル部の一部に重ねられている請求項18に記載の端子。
- 前記易破断部は溝状に形成されている請求項18または請求項19に記載の端子。
- 前記係止部は前記延長部の先端から両側方に延びる一対の係止爪である請求項18ないし請求項20のいずれか一項に記載の端子。
- 前記被係止部には前記係止部に当接することで前記係止部を拡開変形させるテーパ面が形成されている請求項18ないし請求項21のいずれか一項に記載の端子。
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CN201380013914.5A CN104170168B (zh) | 2012-03-15 | 2013-03-15 | 端子以及带端子的电线 |
US14/385,175 US9184541B2 (en) | 2012-03-15 | 2013-03-15 | Terminal and terminal-provided wire |
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Also Published As
Publication number | Publication date |
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CN104170168B (zh) | 2016-08-24 |
US20150079825A1 (en) | 2015-03-19 |
CN104170168A (zh) | 2014-11-26 |
JPWO2013137429A1 (ja) | 2015-08-03 |
US9184541B2 (en) | 2015-11-10 |
DE112013001440T5 (de) | 2015-01-22 |
JP5704421B2 (ja) | 2015-04-22 |
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