WO2009147754A1 - Splice connection electric wire and manufacturing method therefor - Google Patents

Splice connection electric wire and manufacturing method therefor Download PDF

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Publication number
WO2009147754A1
WO2009147754A1 PCT/JP2008/067900 JP2008067900W WO2009147754A1 WO 2009147754 A1 WO2009147754 A1 WO 2009147754A1 JP 2008067900 W JP2008067900 W JP 2008067900W WO 2009147754 A1 WO2009147754 A1 WO 2009147754A1
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WO
WIPO (PCT)
Prior art keywords
exposed conductor
portions
splice
splice terminal
crimping
Prior art date
Application number
PCT/JP2008/067900
Other languages
French (fr)
Japanese (ja)
Inventor
大 樋口
朗 伊東
隆 上野
Original Assignee
住友電装株式会社
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Filing date
Publication date
Application filed by 住友電装株式会社 filed Critical 住友電装株式会社
Publication of WO2009147754A1 publication Critical patent/WO2009147754A1/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
    • H01R4/188—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
    • 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

  • This invention relates to a technique for connecting a plurality of electric wires using a splice terminal.
  • the splice terminal is formed in a substantially U-shaped terminal shape by appropriately punching and bending a metal plate or the like.
  • the connection between the electric wires using the splice terminals is performed as follows. That is, a plurality of electric wires are prepared in which the conductor portion is exposed at the middle portion or the end portion in the longitudinal direction. And the exposed conductor part of each electric wire is arrange
  • FIG. 24 shows the relationship between the compressibility, the contact resistance, and the fixing force when two electric wires are connected using a splice terminal.
  • the electric wire with the conductor portion exposed at the middle portion in the longitudinal direction and the electric wire with the conductor portion exposed at the end portion are connected to each exposed conductor portion using a splice terminal.
  • the compression ratio indicates (total cross-sectional area of conductor part after crimping) / (total cross-sectional area of conductor part before crimping).
  • the contact resistance represents (resistance value measured between one electric wire and the other electric wire) ⁇ (inherent resistance value of each electric wire).
  • the adhering force indicates the force that causes the wire to break when the electric wire is pulled at both ends of the splice terminal.
  • the upper limit contact resistance required for the wiring target portion of the wire is L1
  • the lower limit fixing force is L2.
  • the compression rate needs to be within the range E1.
  • an object of the present invention is to enable crimping at different compression rates at a plurality of locations while suppressing a positional deviation of the terminals when connecting a plurality of electric wires using splice terminals.
  • a splice connection electric wire includes a plurality of electric wires having exposed conductor portions, a bottom portion, and a pair of crimping pieces provided on both sides of the bottom portion, In a state where the exposed conductor portion is disposed inside the bottom portion and the pair of crimping pieces, the pair of crimping pieces are deformed inwardly and the splice terminals are crimped to the plurality of exposed conductor portions,
  • the width direction substantially central portion of the bottom portion is continuous without a step along the longitudinal direction of the exposed conductor portion, and both side portions of the bottom portion are adjacent to each other along the longitudinal direction of the exposed conductor portion. It is formed in a curved surface shape that is different between the parts.
  • the substantially central portion in the width direction of the bottom portion of the splice terminal is formed in a shape that continues without a step along the longitudinal direction of the exposed conductor portion, thereby suppressing the displacement of the splice terminal during the crimping operation.
  • Can do since both sides of the bottom portion of the portion that is continuous without a step at the substantially central portion in the width direction are formed in different curved surfaces between adjacent portions along the longitudinal direction of the exposed conductor portion, there are a plurality of locations. Can be crimped at different compression rates.
  • a second aspect is a splice connection electric wire according to the first aspect, wherein both side portions of the bottom portion are directed toward an end portion side from which the exposed conductor portion is drawn, and the compression rate of the exposed conductor portion is sequentially increased. It is formed in a curved surface shape that is different between adjacent portions along the longitudinal direction of the exposed conductor portion so as to increase.
  • a third aspect is a splice connection electric wire according to the first aspect, wherein one of the plurality of exposed conductor parts is drawn out from each of both end parts of the splice terminal, and both side parts of the bottom part are Toward both end sides, the exposed conductor portions are formed in different curved surfaces between adjacent portions along the longitudinal direction of the exposed conductor portions so that the compression ratio of the exposed conductor portions sequentially increases.
  • the both side portions of the bottom portion are directed toward both end portions, and the compression rate of the exposed conductor portion is reduced. If the curved surface shapes are different between the adjacent portions along the longitudinal direction of the exposed conductor portion, the exposed conductor portions can be held with sufficient fixing force at both end portions thereof.
  • a fourth aspect is a splice connection electric wire according to any one of the first to third aspects, wherein both side portions of the bottom portion are exposed to an end portion side from which a plurality of the exposed conductor portions are drawn.
  • the conductor portions are formed in different curved surfaces between adjacent portions along the longitudinal direction of the exposed conductor portion so that the compression rate of the conductor portion sequentially increases through a plurality of compression rate change boundaries.
  • the exposed conductor portion is formed so that the compression rate of the exposed conductor portion sequentially increases via a plurality of compression rate change boundaries toward both ends of the bottom portion toward the end portion side where the plurality of exposed conductor portions are drawn out.
  • a fifth aspect is a splice connection electric wire according to any one of the first to fourth aspects, wherein the exposed conductor portions are drawn out in different numbers from both ends of the splice terminal, and are formed on both sides of the bottom portion.
  • the compression rate on the end side from which a larger number of exposed conductor parts are drawn out is larger than the compression rate on the end side from which a smaller number of exposed conductor parts are drawn out.
  • the compression rate on the end side from which a larger number of exposed conductor portions are drawn out of the both side portions of the bottom portion is larger than the compression rate on the end side from which a smaller number of exposed conductor portions are drawn out.
  • a method of manufacturing a splice connection electric wire comprising: a splice connection electric wire that crimps a splice terminal having a bottom portion and a pair of crimp pieces provided on both sides of the bottom portion on an exposed conductor portion of the plurality of electric wires; A method of manufacturing, wherein the splice terminal is supported on the first die in a mounting manner, and a plurality of the exposed conductor portions are disposed inside the bottom portion and the pair of crimping pieces, By moving the second die closer to the first die, the pair of crimping pieces are deformed inward by the second die, and the bottom portion is changed in the width direction by the first die.
  • a substantially central portion it is continuous without a step along the longitudinal direction of the exposed conductor portion, and on both sides thereof, it is deformed into a curved surface shape that is different between adjacent portions along the longitudinal direction of the exposed conductor portion, Multiple splice terminals In which and a step of crimping the exposed conductor portion.
  • the splice terminal is supported in a mounting manner on the first die, and the bottom of the splice terminal is connected in a substantially central portion in the width direction without any step along the longitudinal direction of the exposed conductor portion. Therefore, it is possible to suppress the displacement of the splice terminal during the crimping operation.
  • the bottom portion is deformed into different curved shapes between adjacent portions along the longitudinal direction of the exposed conductor portion on both sides of the portion that is continuous without a step at the substantially central portion in the width direction, and therefore, different compression at a plurality of locations. Can be crimped at a rate.
  • FIG. 1 is a plan view showing the splice terminal 10 and the electric wires 20A and 20B before crimping
  • FIG. 2 is a side view showing the splice terminal 10 and the electric wires 20A and 20B before crimping
  • FIG. 3 is a splice terminal before the crimping. 10 and a front view showing the electric wires 20A and 20B.
  • the splice terminal 10 is formed by appropriately punching and bending a metal plate, and has a bottom portion 12 and a pair of crimping pieces 16 provided on both sides of the bottom portion 12.
  • the bottom 12 is formed in a substantially square plate shape.
  • the bottom 12 is formed in a substantially square plate shape that is slightly curved.
  • the bottom portion 12 is a portion that is crimped and deformed by a lower mold 40 described later.
  • the pair of crimping pieces 16 are formed in a substantially plate shape that is bent so as to rise from both side portions of the bottom portion 12 to one main surface side of the bottom portion 12.
  • the pair of crimping pieces 16 are portions that are crimped and deformed by an upper mold 50 described later.
  • the splice terminal 10 as a whole has a semi-tube shape with a substantially U-shaped cross section.
  • the communication direction of the space surrounded by the bottom portion 12 and the pair of crimping pieces 16 is referred to as the axial direction of the splice terminal 10.
  • This axial direction substantially coincides with the longitudinal direction of the exposed conductor portions 22A and 22B crimped by the splice terminal 10 as will be described later.
  • the direction of the bottom portion 12 connected by the pair of crimping pieces 16 is referred to as the width direction.
  • the electric wires 20A and 20B are obtained by covering the conductor portions with coating portions 24A and 24B made of insulating resin or the like.
  • a conductor part is a linear conductor, for example, what twisted several strands, such as annealed copper or aluminum, etc.
  • the covering portions 24A and 24B of the predetermined portions of the electric wires 20A and 20B are removed.
  • the covering portion 24A at the end of one electric wire 20A is removed, and the exposed conductor portion 22A is formed at the end.
  • the covering portion 24B at the middle portion in the longitudinal direction of the other electric wire 20B is removed, and an exposed conductor portion 22B is formed at the middle portion.
  • the length dimension of the exposed conductor portion 22A is preferably larger than the length dimension in the axial direction of the splice terminal 10, and the length dimension of the exposed conductor portion 22B is larger than the length dimension in the axial direction of the splice terminal 10. large.
  • the plurality of electric wires connected by the splice terminals may be any combination of one having an exposed conductor portion at the end of the electric wire and one having an exposed conductor portion in the middle portion in the longitudinal direction of the electric wire. Such various modifications will be described later.
  • the exposed conductor portions 22A and 22B of the electric wires 20A and 20B are crimped by the splice terminal 10
  • the exposed conductor portions 22A and 22B are first connected by the bottom portion 12 and the pair of crimp pieces 16 of the splice terminal 10. Arranged in the enclosed space.
  • FIG. 4 is an explanatory view showing the terminal crimping device 30
  • FIG. 5 is a front view showing the upper die 50 of the terminal crimping device 30
  • FIG. 6 is a side view showing the lower die 40 of the terminal crimping device 30.
  • FIG. 7 is a front view showing the lower mold 40.
  • the terminal crimping device 30 is a device for crimping the splice terminal 10 to the exposed conductor portions 22A and 22B, and includes a lower mold 40 and an upper mold 50.
  • the lower mold 40 is mounted on a base 48 and configured to support the bottom 12 of the splice terminal 10 in a mounting manner.
  • the lower mold 40 is a member called an anvil.
  • the upper mold 50 is disposed to face the lower mold 40.
  • the upper mold 50 is a member also called a crimper.
  • the upper mold 50 is disposed so as to be movable toward and away from the lower mold 40 above the lower mold 40 by an actuator 58 such as an air cylinder or a hydraulic cylinder. Then, while supporting the splice terminal 10 on the lower mold 40 and placing the exposed conductors 22A and 22B in the splice terminal 10, the upper mold 50 is moved closer to the lower mold 40. By doing so, the splice terminal 10 is crimped to the exposed conductor portions 22A and 22B.
  • the shape of the crimping surface of the lower mold 40 and the upper mold 50 will be described more specifically.
  • the upper die 50 is formed with an upper pressure-bonding surface 52 extending in a notch groove shape from the distal end portion toward the proximal end portion (see FIG. 5).
  • the upper crimping surface 52 faces lower crimping surfaces 42a, 42b, and 42c, which will be described later.
  • the innermost (upper) portion of the upper pressure-bonding surface 52 is formed in a shape in which two arc-shaped peripheral surfaces that protrude upward are arranged side by side, and both side surfaces on the front end side of the upper pressure-bonding surface 52 are directed toward the front end side. It is formed in a shape that expands sequentially.
  • the upper crimping surface 52 is formed in substantially the same shape along the axial direction of the splice terminal 10 disposed on the lower mold 40. Then, when the upper mold 50 is moved toward the lower mold 40 in a state where the splice terminal 10 is mounted on the lower mold 40, the pair of crimping pieces 16 are brought into contact with the upper crimping surface 52. While being in sliding contact, it curves inward along the upper crimping surface 52 and is deformed so as to hold the plurality of exposed conductor portions 22A, 22B.
  • a plurality (three in this case) of lower crimp surfaces 42a, 42b, and 42c are formed along the axial direction of the splice terminal 10 to be crimped at the distal end portion (upper end portion) of the lower mold 40. (See FIGS. 6 and 7).
  • the width direction dimensions of the lower crimp surfaces 42a, 42b, and 42c are substantially the same as the width direction dimension of the bottom portion 12 of the splice terminal 10 to be placed thereon, and mainly the entire bottom portion 12 portion. It is configured to be deformable.
  • lower pressure-bonding surfaces 42a, 42b, and 42c are substantially centered in the width direction, and are continuous without a step along the longitudinal direction of the exposed conductor portions 22A and 22B. Moreover, in the width direction both sides of each lower side crimping
  • each of the lower pressure-bonding surfaces 42a, 42b, 42c is formed in a shallow groove shape that is curved in an arc shape about an axis in substantially the same direction with respect to the axial direction of the splice terminal 10.
  • compression-bonding surface 42a, 42b, 42c is formed in the part which adjoins in the said direction, and a different curvature radius.
  • the curvature radius of the lower crimping surface 42b of the middle portion in the axial direction of the splice terminal 10 to be crimped is smaller than the curvature radius of the lower crimping surfaces 42a and 42c at both ends of the splice terminal 10. .
  • each lower pressure-bonding surface 42a, 42b, and 42c are aligned at substantially the same height at the respective substantially central portions in the width direction.
  • the substantially central portions in the width direction of the lower pressure-bonding surfaces 42a, 42b, and 42c are formed to be flat in the axial direction.
  • each lower side crimping surface 42a, 42b, 42c is continued through the level
  • the bottom 12 is deformed to a greater extent (that is, to have a relatively small radius of curvature) at the lower crimp surface 42b. (See FIG. 9), the lower pressure-bonding surfaces 42a and 42c are deformed to a smaller extent (that is, to have a relatively large radius of curvature) (see FIG. 8).
  • the substantially central portion in the width direction of the bottom portion 12 of the splice terminal 10 is formed to be continuous without a step along the longitudinal direction of the exposed conductor portions 22A and 22B.
  • the lower mold 40 having the lower pressure-bonding surfaces 42a, 42b, and 42c as described above can be formed by cutting a single member.
  • the upper pressure-bonding surface 52 of the upper mold 50 usually needs to have a fine surface roughness because it is necessary to greatly deform the pair of pressure-bonding pieces 16. For this reason, the lower press-fit surfaces 42a, 42b, and 42c are formed in the lower mold 40 from the viewpoint of ease of processing.
  • the pair of crimping pieces 16 of the splice terminal 10 is bent and deformed in substantially the same shape along the axial direction of the splice terminal 10 (see FIGS. 8 and 9).
  • a method of manufacturing a splice connection electric wire by crimping the splice terminal 10 to the exposed conductor portions 22A and 22B of the electric wires 20A and 20B using the terminal crimping device 30 configured as described above will be described.
  • the splice terminal 10 and the electric wires 20A and 20B shown in FIGS. 1 and 2 are prepared. Then, as shown in FIG. 10, the splice terminal 10 is supported on the lower mold 40 in a mounted state in a state where the upper mold 50 is separated from the lower mold 40.
  • the splice terminal 10 may be supplied in the form of a chain terminal in which a plurality of splice terminals 10 are interconnected through the connecting portion 19, and FIG. .
  • the exposed conductor portions 22A and 22B are disposed in a space surrounded by the bottom portion 12 of the splice terminal 10 and the pair of crimping pieces 16.
  • the upper mold 50 is moved closer to the lower mold 40.
  • the pair of crimping pieces 16 are deformed inward by the upper crimping surface 52 of the upper mold 50.
  • the bottom 12 is deformed in a different manner by the lower pressure-bonding surfaces 42a, 42b, and 42c by the compressive force between the upper mold 50 and the lower mold 40. That is, that is, the lower crimping surfaces 42a, 42b, and 42c are formed in different curved shapes between adjacent portions, so that both side portions of the bottom 12 of the splice terminal 10 extend along the axial direction of the splice terminal 10.
  • the adjacent parts are deformed at different degrees of deformation.
  • both side portions of the bottom portion 12 of the splice terminal 10 is deformed to a greater extent, and the exposed conductor portions 22A and 22B are compressed to a relatively greater extent (see FIG. 9).
  • both end portions in the axial direction of both side portions of the bottom portion 12 of the splice terminal 10 are deformed to a smaller degree, and the exposed conductor portions 22A and 22B are compressed to a relatively small degree (see FIG. 8).
  • the substantially central portion in the width direction of each of the lower crimp surfaces 42a, 42b, and 42c is continuous without a step along the axial direction of the splice terminal 10, and therefore the substantially central portion in the width direction of the bottom portion 12 is It is formed in a continuous shape without a step.
  • the splice terminal 10 is crimped to the plurality of exposed conductor portions 22A and 22B.
  • the splice terminal 10 is separated from the connecting portion 19 in accordance with the above crimping.
  • the upper mold 50 is separated from the lower mold 40, and the splice connection electric wire is taken out between the upper mold 50 and the lower mold 40. Thereby, the splice connection electric wire in which the splice terminal 10 is collectively crimped to the exposed conductor portions 22A and 22B is manufactured.
  • FIG. 13 is a plan view showing the splice connection wire after crimping
  • FIG. 14 is a bottom view showing the splice connection wire
  • FIG. 15 is a side view showing the splice connection wire.
  • the pair of crimping pieces 16 are deformed inwardly so as to hold the exposed conductor portions 22A and 22B.
  • the pair of crimping pieces 16 are deformed into substantially the same shape along the axial direction of the splice terminal 10.
  • the substantially central portion in the width direction of the bottom portion 12 is formed in a continuous shape without a step along the longitudinal direction of the exposed conductor portions 22A and 22B.
  • the both sides of the bottom part 12 are formed in the curved surface shape which differs between the parts adjacently provided along the longitudinal direction of exposed conductor part 22A, 22B. More specifically, in the axial direction of the splice terminal 10 (longitudinal direction of the exposed conductor portions 22A and 22B), both side portions of the bottom portion 12 are deformed with a relatively large degree of deformation, and the exposed conductor portions 22A and 22B. It is set as the high compression part 13a compressed to a comparatively small compression rate.
  • both side portions of the bottom portion 12 are deformed with a relatively small degree of deformation, so that the exposed conductor portions 22A and 22B have a relatively large compressibility.
  • the compressed low compression portion 13b is used.
  • the compression ratio is set to be relatively small in the high compression portion 13a so as to be suitable for obtaining a contact resistance as small as possible, and the compression ratio is compared in the low compression portion 13b so as to be suitable for obtaining as much fixing force as possible. Can be set larger.
  • the bottom portion 12 of the splice terminal 10 has a shape that is continuous with no step along the longitudinal direction of the exposed conductor portions 22A and 22B at the substantially central portion in the width direction. Therefore, the position variation of the splice terminal 10 during the crimping operation is suppressed. In other words, if the bottom part is connected via the step part along the axial direction, a positional deviation corresponding to the level difference occurs at both end parts of the bottom part by pressure bonding. Then, the position difference between the splice terminal 10 and the exposed conductor portions 22A and 22B occurs due to the difference of the level difference, which may hinder the connection work.
  • the bottom portion 12 is formed in a curved surface shape that is different between adjacent portions along the longitudinal direction of the exposed conductor portions 22A and 22B on both side portions of the portion that is continuous without a step at the substantially central portion in the width direction. , And can be pressure-bonded at a plurality of locations at different compression rates.
  • the force when pulling the electric wires 20A and 20B mainly acts on the end portion of the splice terminal 10, particularly the end portion on the side where the exposed conductor portions 22A and 22B extend to the outside. As described above, as much fixing force as possible can be obtained at a portion where the compression ratio is relatively large. For this reason, it is preferable to set so that a compression rate becomes large sequentially toward the edge part side from which the exposed conductor parts 22A and 22B are drawn out of the splice terminal 10.
  • the case where the exposed conductor portions 22A and 22B are pulled out from the splice terminal 10 means a mode in which a tensile force acts on the exposed conductor portions 22A and 22B by an action such as an external force on the electric wires 20A and 20B.
  • a tensile force acts on the exposed conductor portions 22A and 22B by an action such as an external force on the electric wires 20A and 20B.
  • the tip of the exposed conductor 22A protruding from the splice terminal 110 is not included.
  • one of the plurality of exposed conductor portions 22A and 22B is drawn from each of both end portions of the splice terminal 10. Therefore, both side portions of the bottom portion 12 are adjacent to each other along the longitudinal direction of the exposed conductor portions 22A and 22B so that the compressibility of the exposed conductor portions 22A and 22B sequentially increases toward the both end portions. Are formed in different curved shapes. As a result, the exposed conductor portions 22A and 22B can be held at both ends of the splice terminal 10 with a sufficient fixing force.
  • FIGS. 16 and 17 shows a splice terminal 110 for splicing electric wires 20A and 20B similar to the above embodiment.
  • Both side portions of the bottom portion 112 of the splice terminal 110 are formed in different curved shapes at two locations on both axial end portions thereof. That is, of the two side portions of the bottom 112 of the splice terminal 110, the end portion side from which the two exposed conductor portions 22A and 22B are drawn is formed in the low compression portion 113b having a curved surface shape having a relatively small degree of deformation. The compression rate is set to be relatively large. Further, of the two side portions of the bottom portion 112 of the splice terminal 110, the end portion side from which one exposed conductor portion 22B is drawn is formed in a high compression portion 113a having a curved surface shape having a relatively large degree of deformation. The compression rate is set to be small.
  • both side portions of the bottom portion 112 of the splice terminal 110 are formed in different curved shapes at least at two locations along the longitudinal direction of the exposed conductor portions 22A and 22B, the splice is performed during the crimping operation.
  • the positional deviation of the bottom portion 12 in the axial direction of the terminal 10 can be suppressed, and an effect that it is easy to achieve both a small connection resistance and a large fixing force can be obtained.
  • the exposed conductor portions 22A and 22B are drawn out from the both ends of the splice terminal 110 in different numbers. That is, two exposed conductor portions 22A and 22B are drawn out from one end portion (left end portion in FIG. 16) of the splice terminal 110, and one exposed conductor portion 22B is extended from the other end portion (right end portion in FIG. 16) of the splice terminal 110. Has been withdrawn.
  • a larger number of electric wires 20A and 20B are bundled on the side where a larger number of exposed conductor portions 22A and 22B are drawn.
  • the diameters of the electric wires 20A and 20B are larger than the diameters of the exposed conductor portions 22A and 22B by the thickness of the covering portions 24A and 24B. For this reason, the distance between the centers of the plurality of electric wires 20A and 20B is larger than the distance between the centers of the exposed conductor portions 22A and 22B. Then, a force for opening the exposed conductor portions 22A and 22B outwardly acts at one end portion of the splice terminal 110.
  • the compression rate of one end portion on the side from which a larger number of exposed conductor portions 22A and 22B are drawn out of both side portions of the bottom portion 112 is set to the compression rate of the other end portion on the side from which a smaller number of exposed conductor portions 22B are drawn. It is set larger than. Thereby, it can suppress that the some electric wires 20A and 20B are collectively connected by the splice terminal 110 while being bent at a rapid degree, relieve stress concentration applied to the exposed conductor portions 22A and 22B, and expose the exposed conductor portions 22A and 22A. 22B can be prevented from being damaged or broken.
  • Both sides of the bottom portion 212 of the splice terminal 210 are exposed conductor portions toward the end portion side (left end portion in FIGS. 18 and 19) from which a plurality (three in this case) of exposed conductor portions 22A and 22B are drawn.
  • both side portions of the bottom portion 212 of the splice terminal 210 are compressed toward the end portion side (the right end portion side in FIGS. 18 and 19) from which one exposed conductor portion 22B is drawn out.
  • the middle compression portion 213b is directed toward the end portion where a larger number of exposed conductor portions 22A and 22B are drawn with reference to the highly deformed high compression portion 213a.
  • the low compression part 213c is formed, and the middle compression part 213b is formed toward the end part side from which a smaller number of exposed conductor parts 22B are drawn.
  • the compression rate of one end portion on the side from which a larger number of exposed conductor portions 22 ⁇ / b> A and 22 ⁇ / b> B are drawn out of both side portions of the bottom portion 212 is reduced. It is set larger than the compression rate of the other end on the side from which 22B is pulled out.
  • the plurality of electric wires 20A and 20B can be prevented from being bundled so as to be connected by the splice terminal 210 while being bent at a rapid degree, and the stress concentration applied to the exposed conductor portions 22A and 22B is reduced.
  • breakage, breakage, and the like of the exposed conductor portions 22A and 22B can be suppressed.
  • the compression rate of the exposed conductors 22A and 22B passes through the plurality of compression rate change boundaries 214 toward the end portion side where a plurality (three in this case) of the exposed conductors 22A and 22B are drawn.
  • the degree of compression rate change of the exposed conductor portions 22A and 22B becomes moderate at the splice terminal 10 portion. Thereby, damage, fracture, etc. of the exposed conductor portions 22A and 22B at the splice terminal 10 portion can be suppressed.
  • the modification shown in FIG. 20 shows a case where two electric wires 20C are butted and connected to the electric wire 20B.
  • the covering portion 24C at the end is removed, and an exposed conductor portion 22C is formed at the end.
  • the electric wire 20A is the same as that described in the above embodiment.
  • the exposed conductor portion 22C of the two electric wires 20C is bundled with the exposed conductor portion 22A of the electric wire 20A in a state where the tip portions of the two electric wires 20C are brought into contact with each other. Then, the splice terminal 10 similar to that described in the above embodiment is crimped to the exposed conductor portions 22A and 22C in a state where the tip ends of the two exposed conductor portions 22C are disposed so as to reach the high compression portion 13a. ing.
  • connection structure using the splice terminal 10 or the like can be applied even when the exposed conductor portion 22C that is butt-connected is included.
  • 21 and 22 show an example in which four electric wires 20A similar to those in the above embodiment are connected by the splice terminal 310.
  • the exposed conductor portions 22A of the plurality of electric wires 20A are assembled in such a posture that their tips are directed in the same direction, and the splice terminals 310 are collectively crimped to the four exposed conductor portions 22A. That is, a plurality of exposed conductor portions 22A are drawn out only from one end portion (left end portion in FIGS. 21 and 22) of the splice terminal 310.
  • the exposed conductor portion 22A has a plurality of compression ratios (here, toward the end portion side from which the plurality of exposed conductor portions 22A are drawn out (left end portion side in FIGS. 21 and 22)).
  • a plurality of compression ratios are formed in different curved surfaces between adjacent portions along the longitudinal direction of the exposed conductor portion 22A so as to increase sequentially through three (3) compression rate change boundaries 314. That is, both side portions of the bottom portion 312 of the splice terminal 310 are directed toward the end portion side (the left end portion side in FIGS. 21 and 22) from which the plurality of exposed conductor portions 22A are drawn out. It is formed in the part 313b, the 3rd compression part 313c, and the 4th compression part 313d, and the compression rate becomes large sequentially in this order.
  • the exposed conductor 22A may be drawn out only from one end of the splice terminal 310.
  • the bottom 312 of the splice terminal 310 has a plurality of compression ratios of the exposed conductor 22A toward the one end where the exposed conductor 22A is drawn. It is preferable that the values are set so as to increase sequentially through the compression rate change boundary 314.
  • the lower pressure-bonding surface of the lower mold may be shaped according to the shape of the bottom of the splice terminal.
  • FIG. 23 shows the relationship between the compression rate, the contact resistance, and the adhering force when the two electric wires 20A and 20B are crimped and connected by the splice terminal 10 as described in the above embodiment.
  • the contact resistance and the adhesion force show the same values as described in FIG.
  • the compression rate indicates the compression rate in the low compression portion 13b.
  • the compression rate of the high compression portion 13a is set to be a constant value smaller than the compression rate of the low compression portion 13b.
  • FIG. 23 is compared with FIG. 24, it can be seen that the contact resistance shown in FIG. 23 is generally smaller than the contact resistance shown in FIG. Further, it can be seen that the fixing force shown in FIG. 23 is generally larger than the fixing force shown in FIG.

Abstract

When connecting a plurality of electric wires by using a splice terminal, a splice connection electric wire is allowed to be crimped at different compression ratios at a plurality of points while suppressing a positional deviation of the terminal. The splice connection electric wire includes the electric wires having exposed conductor portions and a pair of crimping pieces provided on both side portions of the bottom portion and the bottom portion. The exposed conductor portions are provided with the crimped splice terminal. The bottom portions are continued with no steps along the longitudinal direction of the exposed conductor portions in the width direction approximately center portion. The bottom portions are formed in different curved surface shapes between the adjacent portions along the longitudinal direction of the exposed conductor portions in the width direction both side portions of the bottom portions.

Description

スプライス接続電線及びスプライス接続電線の製造方法Splice connection wire and method of manufacturing splice connection wire
　この発明は、スプライス端子を用いて複数の電線を接続する技術に関する。 This invention relates to a technique for connecting a plurality of electric wires using a splice terminal.
　複数の電線同士を接続する技術として、スプライス端子を用いたものがある。スプライス端子は、金属板等を適宜打抜き屈曲加工等することで、略Ｕ字状の端子形状に形成されている。このスプライス端子を用いた電線同士の接続は次のようにしてなされる。すなわち、長手方向中間部或は端部で導体部が露出された電線を複数準備する。そして、各電線の露出導体部を、スプライス端子内に配設する。この状態で、圧着工具等でスプライス端子に大きな圧縮荷重を加えてスプライス端子及び導体部を塑性変形させると、複数の電線が、それぞれの露出導体部で相互接続される。 There is a technique that uses a splice terminal as a technique for connecting a plurality of electric wires. The splice terminal is formed in a substantially U-shaped terminal shape by appropriately punching and bending a metal plate or the like. The connection between the electric wires using the splice terminals is performed as follows. That is, a plurality of electric wires are prepared in which the conductor portion is exposed at the middle portion or the end portion in the longitudinal direction. And the exposed conductor part of each electric wire is arrange | positioned in a splice terminal. In this state, when a large compressive load is applied to the splice terminal with a crimping tool or the like to plastically deform the splice terminal and the conductor portion, the plurality of electric wires are interconnected at the respective exposed conductor portions.
　ところで、複数の電線同士を接続するにあたっては、電線相互間の電気的特性（例えば、接触抵抗）及び機械的特性（例えば、固着力）を両立させることが重要な課題となる。 By the way, in connecting a plurality of electric wires, it is an important issue to achieve both electrical characteristics (for example, contact resistance) and mechanical characteristics (for example, adhesion) between the electric wires.
　図２４は、２つの電線を、スプライス端子を用いて接続した場合において、圧縮率と接触抵抗及び固着力との関係を示している。ここでは、長手方向中間部で導体部を露出させた電線と端部で導体部を露出させた電線とを、それぞれの露出導体部でスプライス端子を用いて接続している。上記圧縮率は、（圧着後の導体部の合計断面積）／（圧着前の導体部の合計断面積）を示している。また、接触抵抗は、（一方の電線と他方の電線との間で測定された抵抗値）－（それぞれの電線が持つ固有の抵抗値）を示している。また、固着力は、スプライス端子の両端部で電線を引張った場合に、分断するに至る力を示している。 FIG. 24 shows the relationship between the compressibility, the contact resistance, and the fixing force when two electric wires are connected using a splice terminal. Here, the electric wire with the conductor portion exposed at the middle portion in the longitudinal direction and the electric wire with the conductor portion exposed at the end portion are connected to each exposed conductor portion using a splice terminal. The compression ratio indicates (total cross-sectional area of conductor part after crimping) / (total cross-sectional area of conductor part before crimping). Further, the contact resistance represents (resistance value measured between one electric wire and the other electric wire) − (inherent resistance value of each electric wire). Moreover, the adhering force indicates the force that causes the wire to break when the electric wire is pulled at both ends of the splice terminal.
　同図から、圧縮率が小さくなるに従って（つまり、より高圧縮になるに従って）、接触抵抗が小さくなると共に、固着力も小さくなることがわかる。 From the figure, it can be seen that as the compression ratio becomes smaller (that is, as the compression becomes higher), the contact resistance becomes smaller and the fixing force becomes smaller.
　図２４から理解できるように、接触抵抗をある程度小さくしつつ、ある程度以上の固着力を得るためには、一定の範囲内の圧縮率で圧着を行う必要がある。 As can be understood from FIG. 24, in order to obtain a fixing force of a certain level while reducing the contact resistance to some extent, it is necessary to perform crimping at a compression rate within a certain range.
　例えば、図２４において、電線の配線対象箇所に関して必要とされる上限の接触抵抗をＬ１、下限の固着力をＬ２とする。この場合、必要とされる２つの条件を満たすためには、圧縮率は範囲Ｅ１内である必要がある。このため、圧着作業時には、その成立範囲Ｅ１を満たすように、圧着条件を設定する必要があり、その成立範囲Ｅ１が狭いと製造上の設定管理等が面倒となってしまう。 For example, in FIG. 24, the upper limit contact resistance required for the wiring target portion of the wire is L1, and the lower limit fixing force is L2. In this case, in order to satisfy the two required conditions, the compression rate needs to be within the range E1. For this reason, it is necessary to set the crimping conditions so as to satisfy the establishment range E1 during the crimping operation, and if the establishment range E1 is narrow, the setting management in manufacturing becomes troublesome.
　ここで、比較的大きい圧縮率では固着力が大きく、比較的小さい圧縮率では接触抵抗が小さくなることに着目すると、スプライス端子をその長手方向において異なる圧縮率で圧縮すれば、接触抵抗を小さくすることと、固着力を大きくすること、その両立が可能になると考えられる。 Here, focusing on the fact that the fixing force is large at a relatively large compression ratio and the contact resistance is small at a relatively small compression ratio, if the splice terminal is compressed at a different compression ratio in the longitudinal direction, the contact resistance is reduced. It is thought that it becomes possible to increase the fixing force and to achieve both.
　そのためには、圧着用の金型に段部を介して高低異なる高さの圧縮面を形成し、それぞれの圧縮面で異なる圧縮率で圧縮する手法が想定される。 For this purpose, it is assumed that a compression surface having different heights is formed on a pressure-bonding die through a stepped portion, and the compression surfaces are compressed at different compression rates.
　しかしながら、この場合、端子の両端部で前記段差分の位置ずれを生じ、圧着作業に支障を生じ得る。 However, in this case, a positional shift corresponding to the level difference occurs at both ends of the terminal, which may hinder the crimping operation.
　そこで、本発明は、スプライス端子を用いて複数の電線を接続する際に、端子の位置ずれを抑制しつつ、複数箇所で異なる圧縮率で圧着することができるようにすることを目的とする。 Therefore, an object of the present invention is to enable crimping at different compression rates at a plurality of locations while suppressing a positional deviation of the terminals when connecting a plurality of electric wires using splice terminals.
　上記課題を解決するため、第１の態様に係るスプライス接続電線は、露出導体部を有する複数の電線と、底部と前記底部の両側部に設けられた一対の圧着片とを有し、複数の前記露出導体部が前記底部と前記一対の圧着片との内部に配設された状態で、前記一対の圧着片が内向きに変形されて複数の前記露出導体部に圧着されたスプライス端子と、を備え、前記底部の幅方向略中央部は、前記露出導体部の長手方向に沿って段差無しに連なり、かつ、前記底部の両側部は、前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に形成されているものである。 In order to solve the above-described problem, a splice connection electric wire according to a first aspect includes a plurality of electric wires having exposed conductor portions, a bottom portion, and a pair of crimping pieces provided on both sides of the bottom portion, In a state where the exposed conductor portion is disposed inside the bottom portion and the pair of crimping pieces, the pair of crimping pieces are deformed inwardly and the splice terminals are crimped to the plurality of exposed conductor portions, The width direction substantially central portion of the bottom portion is continuous without a step along the longitudinal direction of the exposed conductor portion, and both side portions of the bottom portion are adjacent to each other along the longitudinal direction of the exposed conductor portion. It is formed in a curved surface shape that is different between the parts.
　これにより、スプライス端子の底部の幅方向略中央部は、前記露出導体部の長手方向に沿って段差無しに連なる形状に形成されているため、圧着作業時におけるスプライス端子の位置ずれを抑制することができる。また、前記底部のうちその幅方向略中央部で段差無しに連なる部分の両側部では、露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に形成されているため、複数箇所で異なる圧縮率で圧着することができる。 As a result, the substantially central portion in the width direction of the bottom portion of the splice terminal is formed in a shape that continues without a step along the longitudinal direction of the exposed conductor portion, thereby suppressing the displacement of the splice terminal during the crimping operation. Can do. In addition, since both sides of the bottom portion of the portion that is continuous without a step at the substantially central portion in the width direction are formed in different curved surfaces between adjacent portions along the longitudinal direction of the exposed conductor portion, there are a plurality of locations. Can be crimped at different compression rates.
　第２の態様は、第１の態様に係るスプライス接続電線であって、前記底部の両側部は、前記露出導体部が引出される端部側に向けて、前記露出導体部の圧縮率が順次大きくなるように、前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に形成されているものである。 A second aspect is a splice connection electric wire according to the first aspect, wherein both side portions of the bottom portion are directed toward an end portion side from which the exposed conductor portion is drawn, and the compression rate of the exposed conductor portion is sequentially increased. It is formed in a curved surface shape that is different between adjacent portions along the longitudinal direction of the exposed conductor portion so as to increase.
　これにより、前記底部の両側部は、前記露出導体部が外部に引出される端部側に向けて、前記露出導体部の圧縮率が小さいため、固着力をより大きくすることができる。 Thereby, since the compressibility of the exposed conductor portion is small toward both ends of the bottom portion toward the end portion where the exposed conductor portion is drawn to the outside, the fixing force can be further increased.
　第３の態様は、第１の態様に係るスプライス接続電線であって、前記スプライス端子の両端部のそれぞれから、複数の前記露出導体部のいずれかが引出され、前記底部の両側部は、その両端部側に向けて、前記露出導体部の圧縮率が順次大きくなるように、前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に形成されているものである。 A third aspect is a splice connection electric wire according to the first aspect, wherein one of the plurality of exposed conductor parts is drawn out from each of both end parts of the splice terminal, and both side parts of the bottom part are Toward both end sides, the exposed conductor portions are formed in different curved surfaces between adjacent portions along the longitudinal direction of the exposed conductor portions so that the compression ratio of the exposed conductor portions sequentially increases.
　これにより、前記スプライス端子の両端部のそれぞれから、複数の前記露出導体部のいずれかが引出されている場合、前記底部の両側部は、両端部側に向けて、前記露出導体部の圧縮率が順次大きくなるように、前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に形成されていると、その両端部側で露出導体部を十分な固着力で保持できる。 Thereby, when any one of the plurality of exposed conductor portions is drawn out from each of both end portions of the splice terminal, the both side portions of the bottom portion are directed toward both end portions, and the compression rate of the exposed conductor portion is reduced. If the curved surface shapes are different between the adjacent portions along the longitudinal direction of the exposed conductor portion, the exposed conductor portions can be held with sufficient fixing force at both end portions thereof.
　第４の態様は、第１～第３のいずれかの態様に係るスプライス接続電線であって、前記底部の両側部は、前記露出導体部が複数引出される端部側に向けて、前記露出導体部の圧縮率が複数の圧縮率変更境界を介して順次大きくなるように、前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に形成されているものである。 A fourth aspect is a splice connection electric wire according to any one of the first to third aspects, wherein both side portions of the bottom portion are exposed to an end portion side from which a plurality of the exposed conductor portions are drawn. The conductor portions are formed in different curved surfaces between adjacent portions along the longitudinal direction of the exposed conductor portion so that the compression rate of the conductor portion sequentially increases through a plurality of compression rate change boundaries.
　これにより、スプライス端子のうち露出導体部が複数引出される端部側では、電線の被覆部の厚み等に起因して、複数の電線をばらけさせる方向へ力が加わりやすい。そこで、底部の両側部が、露出導体部が複数引出される端部側に向けて、前記露出導体部の圧縮率が複数の圧縮率変更境界を介して順次大きくなるように、前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に形成されているようにすることで、スプライス端子での露出導体部の急激な圧縮率変更を抑制して、露出導体部の損傷、破断等を抑制することができる。 Thus, on the end side where a plurality of exposed conductors are drawn out of the splice terminal, a force is easily applied in a direction in which the plurality of wires are separated due to the thickness of the covering portion of the wires. Therefore, the exposed conductor portion is formed so that the compression rate of the exposed conductor portion sequentially increases via a plurality of compression rate change boundaries toward both ends of the bottom portion toward the end portion side where the plurality of exposed conductor portions are drawn out. By suppressing the rapid compression ratio change of the exposed conductor part at the splice terminal by making it be formed in different curved surfaces between the adjacent parts along the longitudinal direction of the damage of the exposed conductor part, Breakage and the like can be suppressed.
　第５の態様は、第１～第４のいずれかの態様に係るスプライス接続電線であって、前記スプライス端子の両端部から前記露出導体部が異なる数で引出され、前記底部の両側部のうちより多数の露出導体部が引出される端部側の圧縮率は、より少数の露出導体部が引出される端部側の圧縮率よりも大きいものである。 A fifth aspect is a splice connection electric wire according to any one of the first to fourth aspects, wherein the exposed conductor portions are drawn out in different numbers from both ends of the splice terminal, and are formed on both sides of the bottom portion. The compression rate on the end side from which a larger number of exposed conductor parts are drawn out is larger than the compression rate on the end side from which a smaller number of exposed conductor parts are drawn out.
　これにより、前記底部の両側部のうちより多数の露出導体部が引出される端部側の圧縮率が、より少数の露出導体部が引出される端部側の圧縮率よりも大きくなるようにすることで、より多数の露出導体部が急激な度合で曲げられつつ圧縮集合されることを抑制でき、露出導体部に加わる応力集中を緩和して、露出導体部の破損、破断等を抑制することができる。 Thereby, the compression rate on the end side from which a larger number of exposed conductor portions are drawn out of the both side portions of the bottom portion is larger than the compression rate on the end side from which a smaller number of exposed conductor portions are drawn out. By doing so, it is possible to suppress a large number of exposed conductor parts from being compressed and assembled while being bent at a rapid degree, and to reduce stress concentration applied to the exposed conductor parts, thereby suppressing breakage, breakage, etc. of the exposed conductor parts be able to.
　第６の態様に係るスプライス接続電線の製造方法は、複数の電線の露出導体部に、底部と前記底部の両側部に設けられた一対の圧着片とを有するスプライス端子を圧着するスプライス接続電線の製造方法であって、第１のダイ上に載置状に前記スプライス端子を支持すると共に、前記底部と前記一対の圧着片との内部に複数の前記露出導体部を配設する工程と、前記第１のダイに対して第２のダイを接近移動させることで、前記第２のダイにより前記一対の圧着片を内向きに変形させると共に、前記第１のダイにより前記底部を、その幅方向略中央部で前記露出導体部の長手方向に沿って段差無しに連なり、かつ、その両側部で前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に変形させて、前記スプライス端子を複数の前記露出導体部に圧着する工程と、を備えるものである。 According to a sixth aspect of the present invention, there is provided a method of manufacturing a splice connection electric wire, comprising: a splice connection electric wire that crimps a splice terminal having a bottom portion and a pair of crimp pieces provided on both sides of the bottom portion on an exposed conductor portion of the plurality of electric wires; A method of manufacturing, wherein the splice terminal is supported on the first die in a mounting manner, and a plurality of the exposed conductor portions are disposed inside the bottom portion and the pair of crimping pieces, By moving the second die closer to the first die, the pair of crimping pieces are deformed inward by the second die, and the bottom portion is changed in the width direction by the first die. In a substantially central portion, it is continuous without a step along the longitudinal direction of the exposed conductor portion, and on both sides thereof, it is deformed into a curved surface shape that is different between adjacent portions along the longitudinal direction of the exposed conductor portion, Multiple splice terminals In which and a step of crimping the exposed conductor portion.
　これにより、スプライス端子は、第１のダイ上に載置状に支持され、スプライス端子の底部は、その幅方向略中央部で前記露出導体部の長手方向に沿って段差無しに連なる態様とされるため、圧着作業時におけるスプライス端子の位置ずれを抑制することができる。また、前記底部は、幅方向略中央部で段差無しに連なる部分の両側部で露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に変形されるため、複数箇所で異なる圧縮率で圧着することができる。 As a result, the splice terminal is supported in a mounting manner on the first die, and the bottom of the splice terminal is connected in a substantially central portion in the width direction without any step along the longitudinal direction of the exposed conductor portion. Therefore, it is possible to suppress the displacement of the splice terminal during the crimping operation. In addition, the bottom portion is deformed into different curved shapes between adjacent portions along the longitudinal direction of the exposed conductor portion on both sides of the portion that is continuous without a step at the substantially central portion in the width direction, and therefore, different compression at a plurality of locations. Can be crimped at a rate.
　この発明の目的、特徴、局面、および利点は、以下の詳細な説明と添付図面とによって、より明白となる。 The objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.
圧着前のスプライス端子及び電線を示す平面図である。It is a top view which shows the splice terminal and electric wire before crimping. 圧着前のスプライス端子及び電線を示す側面図である。It is a side view which shows the splice terminal and electric wire before crimping. 圧着前のスプライス端子及び電線を示す正面図である。It is a front view which shows the splice terminal and electric wire before crimping. 端子圧着装置を示す説明図である。It is explanatory drawing which shows a terminal crimping apparatus. 端子圧着装置の上金型を示す正面図である。It is a front view which shows the upper metal mold | die of a terminal crimping apparatus. 端子圧着装置の下金型を示す側面図である。It is a side view which shows the lower metal mold | die of a terminal crimping apparatus. 同上の下金型を示す正面図である。It is a front view which shows the lower metal mold | die same as the above. 低圧縮部分でのスプライス端子の圧着形状を示す概略断面図である。It is a schematic sectional drawing which shows the crimping | compression-bonding shape of the splice terminal in a low compression part. 高圧縮部分でのスプライス端子の圧着形状を示す概略断面図である。It is a schematic sectional drawing which shows the crimping | compression-bonding shape of the splice terminal in a highly compressed part. スプライス接続電線の製造工程を示す説明図である。It is explanatory drawing which shows the manufacturing process of a splice connection electric wire. スプライス接続電線の製造工程を示す説明図である。It is explanatory drawing which shows the manufacturing process of a splice connection electric wire. スプライス接続電線の製造工程を示す説明図である。It is explanatory drawing which shows the manufacturing process of a splice connection electric wire. 圧着後のスプライス接続電線を示す平面図である。It is a top view which shows the splice connection electric wire after crimping | compression-bonding. 同上のスプライス接続電線を示す底面図である。It is a bottom view which shows a splice connection electric wire same as the above. 同上のスプライス接続電線を示す側面図である。It is a side view which shows a splice connection electric wire same as the above. 変形例に係るスプライス接続電線を示す底面図である。It is a bottom view which shows the splice connection electric wire which concerns on a modification. 同上の変形例に係るスプライス接続電線を示す側面図である。It is a side view which shows the splice connection electric wire which concerns on the modification same as the above. 他の変形例に係るスプライス接続電線を示す底面図である。It is a bottom view which shows the splice connection electric wire which concerns on another modification. 同上の変形例に係るスプライス接続電線を示す側面図である。It is a side view which shows the splice connection electric wire which concerns on the modification same as the above. 他の変形例に係るスプライス接続電線を示す底面図である。It is a bottom view which shows the splice connection electric wire which concerns on another modification. 他の変形例に係るスプライス接続電線を示す底面図である。It is a bottom view which shows the splice connection electric wire which concerns on another modification. 同上の変形例に係るスプライス接続電線を示す側面図である。It is a side view which shows the splice connection electric wire which concerns on the modification same as the above. 実施形態に係るスプライス接続電線に関して、圧縮率と接触抵抗及び固着力との関係を示す図である。It is a figure which shows the relationship between a compression rate, contact resistance, and adhering force regarding the splice connection electric wire which concerns on embodiment. 従来技術に関して、圧縮率と接触抵抗及び固着力との関係を示す図である。It is a figure which shows the relationship between a compression rate, contact resistance, and adhering force regarding a prior art.
　以下、実施形態に係るスプライス接続電線及びその製造方法について説明する。 Hereinafter, the splice connecting wire and the manufacturing method thereof according to the embodiment will be described.
　まず、圧着前のスプライス端子及び電線について説明する。図１は圧着前のスプライス端子１０及び電線２０Ａ，２０Ｂを示す平面図であり、図２は圧着前のスプライス端子１０及び電線２０Ａ，２０Ｂを示す側面図であり、図３は圧着前のスプライス端子１０及び電線２０Ａ，２０Ｂを示す正面図である。 First, the splice terminals and wires before crimping will be described. 1 is a plan view showing the splice terminal 10 and the electric wires 20A and 20B before crimping, FIG. 2 is a side view showing the splice terminal 10 and the electric wires 20A and 20B before crimping, and FIG. 3 is a splice terminal before the crimping. 10 and a front view showing the electric wires 20A and 20B.
　スプライス端子１０は、金属板を適宜打抜き屈曲加工等することにより形成されたものであり、底部１２とその底部１２の両側部に設けられた一対の圧着片１６とを有している。 The splice terminal 10 is formed by appropriately punching and bending a metal plate, and has a bottom portion 12 and a pair of crimping pieces 16 provided on both sides of the bottom portion 12.
　底部１２は、略方形板状に形成されている。ここでは、底部１２は、僅かに湾曲する略方形板状に形成されている。この底部１２は、後述する下金型４０で圧着変形される部分である。一対の圧着片１６は、底部１２の両側部から底部１２の一主面側に立上がるように屈曲形成された略板状に形成されている。この一対の圧着片１６は、後述する上金型５０で圧着変形される部分である。そして、スプライス端子１０全体として、断面略Ｕ状の半管形状を有している。以下、底部１２と一対の圧着片１６とで囲まれる空間の連通方向を、スプライス端子１０の軸方向という。この軸方向は、後述するようにスプライス端子１０で圧着された露出導体部２２Ａ，２２Ｂの長手方向と略一致している。また、底部１２のうち一対の圧着片１６で結ばれる方向を幅方向という。 The bottom 12 is formed in a substantially square plate shape. Here, the bottom 12 is formed in a substantially square plate shape that is slightly curved. The bottom portion 12 is a portion that is crimped and deformed by a lower mold 40 described later. The pair of crimping pieces 16 are formed in a substantially plate shape that is bent so as to rise from both side portions of the bottom portion 12 to one main surface side of the bottom portion 12. The pair of crimping pieces 16 are portions that are crimped and deformed by an upper mold 50 described later. The splice terminal 10 as a whole has a semi-tube shape with a substantially U-shaped cross section. Hereinafter, the communication direction of the space surrounded by the bottom portion 12 and the pair of crimping pieces 16 is referred to as the axial direction of the splice terminal 10. This axial direction substantially coincides with the longitudinal direction of the exposed conductor portions 22A and 22B crimped by the splice terminal 10 as will be described later. Further, the direction of the bottom portion 12 connected by the pair of crimping pieces 16 is referred to as the width direction.
　電線２０Ａ，２０Ｂは、導体部の周囲に、絶縁樹脂等の被覆部２４Ａ，２４Ｂを被覆したものである。導体部は、線状導体であり、例えば、軟銅又はアルミニウム等の素線を複数撚り合わせたもの等である。 The electric wires 20A and 20B are obtained by covering the conductor portions with coating portions 24A and 24B made of insulating resin or the like. A conductor part is a linear conductor, for example, what twisted several strands, such as annealed copper or aluminum, etc.
　また、スプライス端子１０が圧着されるにあたって、上記電線２０Ａ，２０Ｂの所定部分の被覆部２４Ａ，２４Ｂが除去されている。ここでは、一方の電線２０Ａの端部の被覆部２４Ａが除去されており、当該端部に露出導体部２２Ａが形成されている。また、他方の電線２０Ｂの長手方向中間部の被覆部２４Ｂが除去されており、当該中間部に露出導体部２２Ｂが形成されている。露出導体部２２Ａの長さ寸法は、上記スプライス端子１０の軸方向における長さ寸法よりも大きいことが好ましく、露出導体部２２Ｂの長さ寸法は、スプライス端子１０の軸方向における長さ寸法よりも大きい。 Further, when the splice terminal 10 is crimped, the covering portions 24A and 24B of the predetermined portions of the electric wires 20A and 20B are removed. Here, the covering portion 24A at the end of one electric wire 20A is removed, and the exposed conductor portion 22A is formed at the end. Further, the covering portion 24B at the middle portion in the longitudinal direction of the other electric wire 20B is removed, and an exposed conductor portion 22B is formed at the middle portion. The length dimension of the exposed conductor portion 22A is preferably larger than the length dimension in the axial direction of the splice terminal 10, and the length dimension of the exposed conductor portion 22B is larger than the length dimension in the axial direction of the splice terminal 10. large.
　なお、スプライス端子によって接続される複数の電線は、電線の端部に露出導体部を有するもの、電線の長手方向中間部に露出導体部を有するもの、の任意の組合わせであってもよい。そのような各種変形例については後述する。 Note that the plurality of electric wires connected by the splice terminals may be any combination of one having an exposed conductor portion at the end of the electric wire and one having an exposed conductor portion in the middle portion in the longitudinal direction of the electric wire. Such various modifications will be described later.
　そして、電線２０Ａ，２０Ｂの露出導体部２２Ａ，２２Ｂを、スプライス端子１０で圧着する際には、まず、露出導体部２２Ａ，２２Ｂを、スプライス端子１０のうち底部１２と一対の圧着片１６とで囲まれる空間内に配設する。 When the exposed conductor portions 22A and 22B of the electric wires 20A and 20B are crimped by the splice terminal 10, the exposed conductor portions 22A and 22B are first connected by the bottom portion 12 and the pair of crimp pieces 16 of the splice terminal 10. Arranged in the enclosed space.
　この状態で、一対の圧着片１６を内向きに変形させるようにしつつ（図３の矢符Ａ１参照）、底部１２及び一対の圧着片１６に上下方向に圧縮する力を加える。これにより、底部１２及び一対の圧着片１６が、露出導体部２２Ａ，２２Ｂに一括して抱持状に圧着され、複数の電線２０Ａ，２０Ｂが露出導体部２２Ａ，２２Ｂ部分で電気的及び機械的に接続される。 In this state, while compressing the pair of crimping pieces 16 inwardly (see arrow A1 in FIG. 3), a force for compressing the bottom portion 12 and the pair of crimping pieces 16 in the vertical direction is applied. As a result, the bottom 12 and the pair of crimping pieces 16 are collectively crimped to the exposed conductors 22A and 22B so that the plurality of electric wires 20A and 20B are electrically and mechanically connected to the exposed conductors 22A and 22B. Connected to.
　次に、上記スプライス端子１０を圧着する端子圧着装置について説明する。図４は端子圧着装置３０を示す説明図であり、図５は同端子圧着装置３０の上金型５０を示す正面図であり、図６は同端子圧着装置３０の下金型４０を示す側面図であり、図７は同下金型４０を示す正面図である。 Next, a terminal crimping apparatus for crimping the splice terminal 10 will be described. 4 is an explanatory view showing the terminal crimping device 30, FIG. 5 is a front view showing the upper die 50 of the terminal crimping device 30, and FIG. 6 is a side view showing the lower die 40 of the terminal crimping device 30. FIG. 7 is a front view showing the lower mold 40.
　この端子圧着装置３０は、スプライス端子１０を露出導体部２２Ａ，２２Ｂに圧着するための装置であり、下金型４０と上金型５０とを備えている。 The terminal crimping device 30 is a device for crimping the splice terminal 10 to the exposed conductor portions 22A and 22B, and includes a lower mold 40 and an upper mold 50.
　下金型４０は、基台４８上に取付けられており、上記スプライス端子１０の底部１２を載置状に支持可能に構成されている。この下金型４０は、アンビルとも呼ばれる部材である。 The lower mold 40 is mounted on a base 48 and configured to support the bottom 12 of the splice terminal 10 in a mounting manner. The lower mold 40 is a member called an anvil.
　上金型５０は、上記下金型４０に対向して配設されている。この上金型５０は、クリンパとも呼ばれる部材である。ここでは、上金型５０は、エアシリンダや油圧シリンダ等のアクチュエータ５８により、下金型４０の上方で、下金型４０に対して接近離隔移動可能に配設されている。そして、下金型４０上にスプライス端子１０を載置状に支持すると共に、スプライス端子１０内に露出導体部２２Ａ，２２Ｂを配設した状態で、上金型５０を下金型４０に接近移動させることで、スプライス端子１０が露出導体部２２Ａ，２２Ｂに圧着されるようになっている。 The upper mold 50 is disposed to face the lower mold 40. The upper mold 50 is a member also called a crimper. Here, the upper mold 50 is disposed so as to be movable toward and away from the lower mold 40 above the lower mold 40 by an actuator 58 such as an air cylinder or a hydraulic cylinder. Then, while supporting the splice terminal 10 on the lower mold 40 and placing the exposed conductors 22A and 22B in the splice terminal 10, the upper mold 50 is moved closer to the lower mold 40. By doing so, the splice terminal 10 is crimped to the exposed conductor portions 22A and 22B.
　下金型４０及び上金型５０の圧着面形状についてより具体的に説明する。 The shape of the crimping surface of the lower mold 40 and the upper mold 50 will be described more specifically.
　上金型５０には、先端部から基端部に向けて切欠溝状に延びる上側圧着面５２が形成されている（図５参照）。この上側圧着面５２は、後述する下側圧着面４２ａ，４２ｂ，４２ｃと対向している。上側圧着面５２の最奥（上）部は、上向きに凸となる弧状周面を２つ横並びにした形状に形成されており、上側圧着面５２の先端側両側面は、先端側に向けて順次拡開する形状に形成されている。この上側圧着面５２は、下金型４０上に配設されるスプライス端子１０の軸方向に沿って略同一面形状に形成されている。そして、下金型４０上にスプライス端子１０を載置状に支持した状態で、本上金型５０を下金型４０に向けて接近移動させると、一対の圧着片１６が上側圧着面５２に摺接しつつ当該上側圧着面５２に沿って内向きに湾曲し、複数の露出導体部２２Ａ，２２Ｂを抱持するように変形するようになっている。 The upper die 50 is formed with an upper pressure-bonding surface 52 extending in a notch groove shape from the distal end portion toward the proximal end portion (see FIG. 5). The upper crimping surface 52 faces lower crimping surfaces 42a, 42b, and 42c, which will be described later. The innermost (upper) portion of the upper pressure-bonding surface 52 is formed in a shape in which two arc-shaped peripheral surfaces that protrude upward are arranged side by side, and both side surfaces on the front end side of the upper pressure-bonding surface 52 are directed toward the front end side. It is formed in a shape that expands sequentially. The upper crimping surface 52 is formed in substantially the same shape along the axial direction of the splice terminal 10 disposed on the lower mold 40. Then, when the upper mold 50 is moved toward the lower mold 40 in a state where the splice terminal 10 is mounted on the lower mold 40, the pair of crimping pieces 16 are brought into contact with the upper crimping surface 52. While being in sliding contact, it curves inward along the upper crimping surface 52 and is deformed so as to hold the plurality of exposed conductor portions 22A, 22B.
　また、下金型４０の先端部（上端部）には、圧着対象となるスプライス端子１０の軸方向に沿って複数（ここでは３つ）の下側圧着面４２ａ，４２ｂ，４２ｃが形成されている（図６及び図７参照）。これらの下側圧着面４２ａ，４２ｂ，４２ｃの幅方向寸法は、その上に載置されることになるスプライス端子１０の底部１２の幅方向寸法と略一致しており、主として当該底部１２部分全体を変形可能に構成されている。 In addition, a plurality (three in this case) of lower crimp surfaces 42a, 42b, and 42c are formed along the axial direction of the splice terminal 10 to be crimped at the distal end portion (upper end portion) of the lower mold 40. (See FIGS. 6 and 7). The width direction dimensions of the lower crimp surfaces 42a, 42b, and 42c are substantially the same as the width direction dimension of the bottom portion 12 of the splice terminal 10 to be placed thereon, and mainly the entire bottom portion 12 portion. It is configured to be deformable.
　これらの下側圧着面４２ａ，４２ｂ，４２ｃは、その幅方向略中央部で、露出導体部２２Ａ，２２Ｂの長手方向に沿って段差無しに連なっている。また、各下側圧着面４２ａ，４２ｂ，４２ｃの幅方向両側部では、露出導体部２２Ａ，２２Ｂの長手方向に沿って隣設する部分間で、異なる曲面形状に形成されている。 These lower pressure- bonding surfaces 42a, 42b, and 42c are substantially centered in the width direction, and are continuous without a step along the longitudinal direction of the exposed conductor portions 22A and 22B. Moreover, in the width direction both sides of each lower side crimping | compression- bonding surface 42a, 42b, 42c, it is formed in a different curved surface shape between the adjacent parts along the longitudinal direction of exposed conductor part 22A, 22B.
　ここでは、各下側圧着面４２ａ，４２ｂ，４２ｃは、スプライス端子１０の軸方向に対して略同一方向の軸を中心として弧状に湾曲する浅溝状に形成されている。また、各下側圧着面４２ａ，４２ｂ，４２ｃは、前記方向で隣設する部分間で、異なる曲率半径に形成されている。ここでは、圧着対象となるスプライス端子１０の軸方向中間部の下側圧着面４２ｂの曲率半径は、同スプライス端子１０の両端部の下側圧着面４２ａ，４２ｃの曲率半径よりも小さくなっている。また、各下側圧着面４２ａ，４２ｂ，４２ｃは、それぞれの幅方向略中央部で略同位置の高さ位置に揃っている。換言すれば、各下側圧着面４２ａ，４２ｂ，４２ｃの幅方向略中央部は、前記軸方向でフラットとなるように形成されている。また、各下側圧着面４２ａ，４２ｂ，４２ｃは、上記曲率半径の相違により、それぞれの幅方向両側部で段差を介して連なっている。 Here, each of the lower pressure- bonding surfaces 42a, 42b, 42c is formed in a shallow groove shape that is curved in an arc shape about an axis in substantially the same direction with respect to the axial direction of the splice terminal 10. Moreover, each lower side crimping | compression- bonding surface 42a, 42b, 42c is formed in the part which adjoins in the said direction, and a different curvature radius. Here, the curvature radius of the lower crimping surface 42b of the middle portion in the axial direction of the splice terminal 10 to be crimped is smaller than the curvature radius of the lower crimping surfaces 42a and 42c at both ends of the splice terminal 10. . Further, the lower pressure- bonding surfaces 42a, 42b, and 42c are aligned at substantially the same height at the respective substantially central portions in the width direction. In other words, the substantially central portions in the width direction of the lower pressure- bonding surfaces 42a, 42b, and 42c are formed to be flat in the axial direction. Moreover, each lower side crimping surface 42a, 42b, 42c is continued through the level | step difference in each width direction both sides by the difference in the said curvature radius.
　そして、下金型４０と上金型５０との間でスプライス端子１０を圧着すると、底部１２は、下側圧着面４２ｂでより大きい程度で（つまり、比較的小さい曲率半径となるように）変形され（図９参照）、下側圧着面４２ａ，４２ｃでより小さい程度で（つまり、比較的大きい曲率半径となるように）変形されるようになっている（図８参照）。また、この際、スプライス端子１０の底部１２の幅方向略中央部は、露出導体部２２Ａ，２２Ｂの長手方向に沿って段差無しで連なるように形成されるようになっている。 When the splice terminal 10 is crimped between the lower mold 40 and the upper mold 50, the bottom 12 is deformed to a greater extent (that is, to have a relatively small radius of curvature) at the lower crimp surface 42b. (See FIG. 9), the lower pressure- bonding surfaces 42a and 42c are deformed to a smaller extent (that is, to have a relatively large radius of curvature) (see FIG. 8). At this time, the substantially central portion in the width direction of the bottom portion 12 of the splice terminal 10 is formed to be continuous without a step along the longitudinal direction of the exposed conductor portions 22A and 22B.
　なお、上記のような下側圧着面４２ａ，４２ｂ，４２ｃを有する下金型４０は、単一の部材を切削加工等することで形成することができる。また、通常、上金型５０の上側圧着面５２は、一対の圧着片１６を大きく変形させる必要があるため、細かな表面粗さが求められる。このため、加工容易性という点から、下側圧着面４２ａ，４２ｂ，４２ｃを下金型４０に形成している。 The lower mold 40 having the lower pressure- bonding surfaces 42a, 42b, and 42c as described above can be formed by cutting a single member. In addition, the upper pressure-bonding surface 52 of the upper mold 50 usually needs to have a fine surface roughness because it is necessary to greatly deform the pair of pressure-bonding pieces 16. For this reason, the lower press- fit surfaces 42a, 42b, and 42c are formed in the lower mold 40 from the viewpoint of ease of processing.
　また、スプライス端子１０のうち一対の圧着片１６は、スプライス端子１０の軸方向に沿って略同形状に湾曲変形されるようになっている（図８及び図９参照）。 Also, the pair of crimping pieces 16 of the splice terminal 10 is bent and deformed in substantially the same shape along the axial direction of the splice terminal 10 (see FIGS. 8 and 9).
　このように構成された端子圧着装置３０を用いてスプライス端子１０を電線２０Ａ，２０Ｂの露出導体部２２Ａ，２２Ｂに圧着して、スプライス接続電線を製造する方法について説明する。 A method of manufacturing a splice connection electric wire by crimping the splice terminal 10 to the exposed conductor portions 22A and 22B of the electric wires 20A and 20B using the terminal crimping device 30 configured as described above will be described.
　まず、図１及び図２に示すスプライス端子１０及び電線２０Ａ，２０Ｂを準備する。そして、図１０に示すように、上金型５０を下金型４０から離間させた状態で、スプライス端子１０を下金型４０上に載置状に支持する。ここで、スプライス端子１０は、複数のスプライス端子１０が連結部１９を通じて相互連結された連鎖端子の形態で供給される場合があり、図１０でもそのような態様で供給された様子を示している。 First, the splice terminal 10 and the electric wires 20A and 20B shown in FIGS. 1 and 2 are prepared. Then, as shown in FIG. 10, the splice terminal 10 is supported on the lower mold 40 in a mounted state in a state where the upper mold 50 is separated from the lower mold 40. Here, the splice terminal 10 may be supplied in the form of a chain terminal in which a plurality of splice terminals 10 are interconnected through the connecting portion 19, and FIG. .
　そして、スプライス端子１０の底部１２と一対の圧着片１６とで囲まれる空間内に、露出導体部２２Ａ，２２Ｂを配設する。 The exposed conductor portions 22A and 22B are disposed in a space surrounded by the bottom portion 12 of the splice terminal 10 and the pair of crimping pieces 16.
　そして、図１１に示すように、上金型５０を下金型４０に接近移動させる。そして、上金型５０の上側圧着面５２により一対の圧着片１６を内向きに変形させる。また、上金型５０と下金型４０との間での圧縮力により、各下側圧着面４２ａ，４２ｂ，４２ｃにより底部１２を異なる態様に変形させる。すなわち、即ち、各下側圧着面４２ａ，４２ｂ，４２ｃは隣設する部分間で異なる曲面形状に形成されているので、スプライス端子１０の底部１２の両側部を、スプライス端子１０の軸方向に沿った隣設する部分間では異なる変形度合で変形させる。これにより、スプライス端子１０の底部１２の両側部のうちその軸方向中間部は、より大きな度合で変形して露出導体部２２Ａ，２２Ｂが比較的大きい度合で圧縮される（図９参照）。また、スプライス端子１０の底部１２の両側部のうちその軸方向両端部は、より小さな度合で変形して露出導体部２２Ａ，２２Ｂが比較的小さい度合で圧縮される（図８参照）。また、この際、各下側圧着面４２ａ，４２ｂ，４２ｃの幅方向略中央部は、スプライス端子１０の軸方向に沿って段差無しに連なっているので、底部１２の幅方向略中央部は、段差無しに連なる形状に形成される。これにより、スプライス端子１０を複数の露出導体部２２Ａ，２２Ｂに圧着する。 Then, as shown in FIG. 11, the upper mold 50 is moved closer to the lower mold 40. Then, the pair of crimping pieces 16 are deformed inward by the upper crimping surface 52 of the upper mold 50. Further, the bottom 12 is deformed in a different manner by the lower pressure- bonding surfaces 42a, 42b, and 42c by the compressive force between the upper mold 50 and the lower mold 40. That is, that is, the lower crimping surfaces 42a, 42b, and 42c are formed in different curved shapes between adjacent portions, so that both side portions of the bottom 12 of the splice terminal 10 extend along the axial direction of the splice terminal 10. The adjacent parts are deformed at different degrees of deformation. As a result, the axially intermediate portion of both side portions of the bottom portion 12 of the splice terminal 10 is deformed to a greater extent, and the exposed conductor portions 22A and 22B are compressed to a relatively greater extent (see FIG. 9). Further, both end portions in the axial direction of both side portions of the bottom portion 12 of the splice terminal 10 are deformed to a smaller degree, and the exposed conductor portions 22A and 22B are compressed to a relatively small degree (see FIG. 8). Further, at this time, the substantially central portion in the width direction of each of the lower crimp surfaces 42a, 42b, and 42c is continuous without a step along the axial direction of the splice terminal 10, and therefore the substantially central portion in the width direction of the bottom portion 12 is It is formed in a continuous shape without a step. As a result, the splice terminal 10 is crimped to the plurality of exposed conductor portions 22A and 22B.
　なお、上記圧着にあわせて、スプライス端子１０は連結部１９から切離される。 Note that the splice terminal 10 is separated from the connecting portion 19 in accordance with the above crimping.
　この後、図１２に示すように、上金型５０を下金型４０から離間させて、上金型５０及び下金型４０の間から、スプライス接続電線を取出す。これにより、スプライス端子１０が露出導体部２２Ａ，２２Ｂに一括して圧着されたスプライス接続電線が製造される。 Thereafter, as shown in FIG. 12, the upper mold 50 is separated from the lower mold 40, and the splice connection electric wire is taken out between the upper mold 50 and the lower mold 40. Thereby, the splice connection electric wire in which the splice terminal 10 is collectively crimped to the exposed conductor portions 22A and 22B is manufactured.
　図１３は圧着後のスプライス接続電線を示す平面図であり、図１４は同スプライス接続電線を示す底面図であり、図１５は同スプライス接続電線を示す側面図である。 13 is a plan view showing the splice connection wire after crimping, FIG. 14 is a bottom view showing the splice connection wire, and FIG. 15 is a side view showing the splice connection wire.
　すなわち、上記のようにして製造されたスプライス接続電線では、一対の圧着片１６が内向きに湾曲状に変形し、露出導体部２２Ａ，２２Ｂを抱持するように変形している。一対の圧着片１６は、スプライス端子１０の軸方向に沿って略同様形状に変形している。 That is, in the splice connection electric wire manufactured as described above, the pair of crimping pieces 16 are deformed inwardly so as to hold the exposed conductor portions 22A and 22B. The pair of crimping pieces 16 are deformed into substantially the same shape along the axial direction of the splice terminal 10.
　また、底部１２の幅方向略中央部は、露出導体部２２Ａ，２２Ｂの長手方向に沿って段差無しに連なる形状に形成されている。また、底部１２の両側部は、露出導体部２２Ａ，２２Ｂの長手方向に沿って隣設する部分間で異なる曲面形状に形成されている。より具体的には、スプライス端子１０の軸方向（露出導体部２２Ａ，２２Ｂの長手方向）略中間部で、底部１２の両側部は、比較的大きな変形度合で変形し、露出導体部２２Ａ，２２Ｂを比較的小さな圧縮率に圧縮させた高圧縮部分１３ａとされている。また、スプライス端子１０の軸方向（露出導体部２２Ａ，２２Ｂの長手方向）で、底部１２の両側部は、比較的小さな変形度合で変形し、露出導体部２２Ａ，２２Ｂを比較的大きな圧縮率に圧縮した低圧縮部分１３ｂとされている。 Further, the substantially central portion in the width direction of the bottom portion 12 is formed in a continuous shape without a step along the longitudinal direction of the exposed conductor portions 22A and 22B. Moreover, the both sides of the bottom part 12 are formed in the curved surface shape which differs between the parts adjacently provided along the longitudinal direction of exposed conductor part 22A, 22B. More specifically, in the axial direction of the splice terminal 10 (longitudinal direction of the exposed conductor portions 22A and 22B), both side portions of the bottom portion 12 are deformed with a relatively large degree of deformation, and the exposed conductor portions 22A and 22B. It is set as the high compression part 13a compressed to a comparatively small compression rate. In addition, in the axial direction of the splice terminal 10 (longitudinal direction of the exposed conductor portions 22A and 22B), both side portions of the bottom portion 12 are deformed with a relatively small degree of deformation, so that the exposed conductor portions 22A and 22B have a relatively large compressibility. The compressed low compression portion 13b is used.
　これにより、高圧縮部分１３ａでは、なるべく小さな接触抵抗を得るのに適するように圧縮率を比較的小さく設定し、低圧縮部分１３ｂでは、なるべく大きな固着力を得るのに適するように圧縮率を比較的大きく設定することができる。 Accordingly, the compression ratio is set to be relatively small in the high compression portion 13a so as to be suitable for obtaining a contact resistance as small as possible, and the compression ratio is compared in the low compression portion 13b so as to be suitable for obtaining as much fixing force as possible. Can be set larger.
　以上のように構成されたスプライス接続電線及びその製造方法によると、スプライス端子１０の底部１２は、その幅方向略中央部で、露出導体部２２Ａ，２２Ｂの長手方向に沿って段差無しに連なる形状に形成されているため、圧着作業時におけるスプライス端子１０の位置変動が抑制される。つまり、仮に、底部が前記軸方向に沿って段部を介して連なっていると、圧着により底部の両端部で当該段差分の位置ずれを生じる。すると、当該段差分のずれによって、スプライス端子１０と露出導体部２２Ａ，２２Ｂとの位置ずれが生じ、その接続作業に支障を生じ得る。これに対して、ここでは、スプライス端子１０の底部１２の幅方向略中央部で段差無しに連なっているため、圧着作業時において、スプライス端子１０の軸方向において底部１２の位置ずれを抑制できる。これにより、スプライス端子１０と露出導体部２２Ａ，２２Ｂとの圧着接続を確実かつ容易に行える。 According to the splice connecting wire configured as described above and the manufacturing method thereof, the bottom portion 12 of the splice terminal 10 has a shape that is continuous with no step along the longitudinal direction of the exposed conductor portions 22A and 22B at the substantially central portion in the width direction. Therefore, the position variation of the splice terminal 10 during the crimping operation is suppressed. In other words, if the bottom part is connected via the step part along the axial direction, a positional deviation corresponding to the level difference occurs at both end parts of the bottom part by pressure bonding. Then, the position difference between the splice terminal 10 and the exposed conductor portions 22A and 22B occurs due to the difference of the level difference, which may hinder the connection work. On the other hand, here, since there is no step at the substantially central portion in the width direction of the bottom portion 12 of the splice terminal 10, it is possible to suppress the displacement of the bottom portion 12 in the axial direction of the splice terminal 10 during the crimping operation. Thereby, the crimp connection between the splice terminal 10 and the exposed conductor portions 22A and 22B can be reliably and easily performed.
　また、底部１２は、その幅方向略中央部で段差無しに連なる部分の両側部で、露出導体部２２Ａ，２２Ｂの長手方向に沿って隣設する部分間で異なる曲面形状に形成されているため、複数箇所で異なる圧縮率で圧着することができる。 Further, the bottom portion 12 is formed in a curved surface shape that is different between adjacent portions along the longitudinal direction of the exposed conductor portions 22A and 22B on both side portions of the portion that is continuous without a step at the substantially central portion in the width direction. , And can be pressure-bonded at a plurality of locations at different compression rates.
　これにより、小さい接触抵抗を得ることができるようにした圧縮率箇所と大きい固着力が得られるようにした圧縮率箇所とを形成することができ、小さい接続抵抗と大きい固着力とを両立し易い。 As a result, it is possible to form a compression rate portion where a small contact resistance can be obtained and a compression rate portion where a large fixing force can be obtained, and it is easy to achieve both a small connection resistance and a large fixing force. .
　なお、電線２０Ａ，２０Ｂを引張った際の力は、主として、スプライス端子１０の端部、特に、露出導体部２２Ａ，２２Ｂが外部に延出する側の端部に作用する。そして、上述したように、圧縮率が比較的大きい部分で、なるべく大きな固着力を得ることができる。このため、スプライス端子１０のうち露出導体部２２Ａ，２２Ｂが引出される端部側に向けて、圧縮率が順次大きくなるように設定することが好ましい。 The force when pulling the electric wires 20A and 20B mainly acts on the end portion of the splice terminal 10, particularly the end portion on the side where the exposed conductor portions 22A and 22B extend to the outside. As described above, as much fixing force as possible can be obtained at a portion where the compression ratio is relatively large. For this reason, it is preferable to set so that a compression rate becomes large sequentially toward the edge part side from which the exposed conductor parts 22A and 22B are drawn out of the splice terminal 10.
　ここで、スプライス端子１０から露出導体部２２Ａ，２２Ｂが引出される場合とは、電線２０Ａ，２０Ｂに対する外力等の作用により露出導体部２２Ａ，２２Ｂに引張り力が作用する態様を意味しており、例えば、スプライス端子１１０から突出する露出導体部２２Ａの先端部を含まない。 Here, the case where the exposed conductor portions 22A and 22B are pulled out from the splice terminal 10 means a mode in which a tensile force acts on the exposed conductor portions 22A and 22B by an action such as an external force on the electric wires 20A and 20B. For example, the tip of the exposed conductor 22A protruding from the splice terminal 110 is not included.
　本実施形態では、スプライス端子１０の両端部のそれぞれから複数の露出導体部２２Ａ，２２Ｂのいずれかが引出されている。そこで、底部１２の両側部は、その両端部側に向けて、露出導体部２２Ａ，２２Ｂの圧縮率が順次大きくなるように、露出導体部２２Ａ，２２Ｂの長手方向に沿って隣設する部分間で異なる曲面形状に形成している。これにより、スプライス端子１０の両端部で、露出導体部２２Ａ，２２Ｂを十分な固着力で保持できる。 In the present embodiment, one of the plurality of exposed conductor portions 22A and 22B is drawn from each of both end portions of the splice terminal 10. Therefore, both side portions of the bottom portion 12 are adjacent to each other along the longitudinal direction of the exposed conductor portions 22A and 22B so that the compressibility of the exposed conductor portions 22A and 22B sequentially increases toward the both end portions. Are formed in different curved shapes. As a result, the exposed conductor portions 22A and 22B can be held at both ends of the splice terminal 10 with a sufficient fixing force.
　上記実施形態の各種変形例について説明する。 Various modifications of the above embodiment will be described.
　例えば、図１６及び図１７に示す変形例は、上記実施形態と同様の電線２０Ａ，２０Ｂをスプライス接続するスプライス端子１１０を示している。 For example, the modification shown in FIGS. 16 and 17 shows a splice terminal 110 for splicing electric wires 20A and 20B similar to the above embodiment.
　このスプライス端子１１０の底部１１２の両側部は、その軸方向両端部の２箇所で異なる曲面形状に形成されている。すなわち、スプライス端子１１０の底部１１２の両側部のうち、２つの露出導体部２２Ａ，２２Ｂが引出される端部側では、比較的小さな変形度合となる曲面形状である低圧縮部分１１３ｂに形成されて、比較的大きな圧縮率となるように設定されている。また、スプライス端子１１０の底部１１２の両側部のうち、１つの露出導体部２２Ｂが引出される端部側では、比較的大きな変形度合となる曲面形状である高圧縮部分１１３ａに形成されて、比較的小さな圧縮率となるように設定されている。 Both side portions of the bottom portion 112 of the splice terminal 110 are formed in different curved shapes at two locations on both axial end portions thereof. That is, of the two side portions of the bottom 112 of the splice terminal 110, the end portion side from which the two exposed conductor portions 22A and 22B are drawn is formed in the low compression portion 113b having a curved surface shape having a relatively small degree of deformation. The compression rate is set to be relatively large. Further, of the two side portions of the bottom portion 112 of the splice terminal 110, the end portion side from which one exposed conductor portion 22B is drawn is formed in a high compression portion 113a having a curved surface shape having a relatively large degree of deformation. The compression rate is set to be small.
　この変形例のように、スプライス端子１１０の底部１１２の両側部は、露出導体部２２Ａ，２２Ｂの長手方向に沿って少なくとも２箇所で異なる曲面形状に形成されていれば、圧着作業時において、スプライス端子１０の軸方向において底部１２の位置ずれを抑制でき、かつ、小さい接続抵抗と大きい固着力とを両立し易いという効果を得ることができる。 As in this modified example, if both side portions of the bottom portion 112 of the splice terminal 110 are formed in different curved shapes at least at two locations along the longitudinal direction of the exposed conductor portions 22A and 22B, the splice is performed during the crimping operation. The positional deviation of the bottom portion 12 in the axial direction of the terminal 10 can be suppressed, and an effect that it is easy to achieve both a small connection resistance and a large fixing force can be obtained.
　また、上記変形例では、スプライス端子１１０の両端部から露出導体部２２Ａ，２２Ｂが異なる数で引出されている。すなわち、スプライス端子１１０の一端部（図１６の左端部）から２つの露出導体部２２Ａ，２２Ｂが引出され、スプライス端子１１０の他端部（図１６の右端部）から１つの露出導体部２２Ｂが引出されている。 In the above modification, the exposed conductor portions 22A and 22B are drawn out from the both ends of the splice terminal 110 in different numbers. That is, two exposed conductor portions 22A and 22B are drawn out from one end portion (left end portion in FIG. 16) of the splice terminal 110, and one exposed conductor portion 22B is extended from the other end portion (right end portion in FIG. 16) of the splice terminal 110. Has been withdrawn.
　この場合、より多数の露出導体部２２Ａ，２２Ｂが引出された側では、より多数の電線２０Ａ，２０Ｂが束ねられる。そして、電線２０Ａ，２０Ｂの直径は、被覆部２４Ａ，２４Ｂの厚み分、露出導体部２２Ａ，２２Ｂの直径よりも大きい。このため、複数の電線２０Ａ，２０Ｂの中心間距離は、露出導体部２２Ａ，２２Ｂの中心間距離よりも大きくなる。とすると、スプライス端子１１０の一端部で、露出導体部２２Ａ，２２Ｂを外側に開こうとする力が作用してしまう。 In this case, a larger number of electric wires 20A and 20B are bundled on the side where a larger number of exposed conductor portions 22A and 22B are drawn. The diameters of the electric wires 20A and 20B are larger than the diameters of the exposed conductor portions 22A and 22B by the thickness of the covering portions 24A and 24B. For this reason, the distance between the centers of the plurality of electric wires 20A and 20B is larger than the distance between the centers of the exposed conductor portions 22A and 22B. Then, a force for opening the exposed conductor portions 22A and 22B outwardly acts at one end portion of the splice terminal 110.
　そこで、底部１１２の両側部のうちより多数の露出導体部２２Ａ，２２Ｂが引出される側の一端部の圧縮率を、より少数の露出導体部２２Ｂが引出される側の他端部の圧縮率よりも大きく設定している。これにより、複数の電線２０Ａ，２０Ｂが急激な度合で曲げられつつスプライス端子１１０で集合接続されることを抑制でき、露出導体部２２Ａ，２２Ｂに加わる応力集中を緩和して、露出導体部２２Ａ，２２Ｂの破損、破断等を抑制できる。 Therefore, the compression rate of one end portion on the side from which a larger number of exposed conductor portions 22A and 22B are drawn out of both side portions of the bottom portion 112 is set to the compression rate of the other end portion on the side from which a smaller number of exposed conductor portions 22B are drawn. It is set larger than. Thereby, it can suppress that the some electric wires 20A and 20B are collectively connected by the splice terminal 110 while being bent at a rapid degree, relieve stress concentration applied to the exposed conductor portions 22A and 22B, and expose the exposed conductor portions 22A and 22A. 22B can be prevented from being damaged or broken.
　また、図１８及び図１９に示す変形例では、上記実施形態と同様の電線２０Ａを２本，電線２０Ｂを１本、合計３本の電線２０Ａ，２０Ｂを、スプライス接続するスプライス端子２１０を示している。 18 and 19 show a splice terminal 210 for splicing a total of three wires 20A and 20B, two wires 20A and one wire 20B similar to the above embodiment. Yes.
　このスプライス端子２１０の底部２１２の両側部は、露出導体部２２Ａ，２２Ｂが複数（ここでは３本）引出される端部側（図１８及び図１９の左端部側）に向けて、露出導体部２２Ａ，２２Ｂの圧縮率が複数（ここでは３つ）の圧縮率変更境界２１４を介して順次大きくなるように、露出導体部２２Ａ，２２Ｂの長手方向に沿って隣設する部分間で異なる曲面形状に形成されている。 Both sides of the bottom portion 212 of the splice terminal 210 are exposed conductor portions toward the end portion side (left end portion in FIGS. 18 and 19) from which a plurality (three in this case) of exposed conductor portions 22A and 22B are drawn. Different curved surface shapes between adjacent portions along the longitudinal direction of the exposed conductor portions 22A and 22B so that the compression rates of 22A and 22B sequentially increase via a plurality (three in this case) of compression rate change boundaries 214. Is formed.
　また、スプライス端子２１０の底部２１２の両側部は、１つの露出導体部２２Ｂが引出される端部側（図１８及び図１９の右端部側）に向けて、露出導体部２２Ａ，２２Ｂの圧縮率が一つの圧縮率変更境界２１４を介して大きくなるように、露出導体部２２Ａ，２２Ｂの長手方向に沿って隣設する部分間で異なる曲面形状に形成されている。 Further, both side portions of the bottom portion 212 of the splice terminal 210 are compressed toward the end portion side (the right end portion side in FIGS. 18 and 19) from which one exposed conductor portion 22B is drawn out. Are formed to have different curved shapes between adjacent portions along the longitudinal direction of the exposed conductor portions 22A and 22B so that the width of the exposed conductor portions 22A and 22B increases.
　つまり、スプライス端子２１０の底部２１２の両側部には、最も大きく変形した高圧縮部分２１３ａを基準にして、より多数の露出導体部２２Ａ，２２Ｂが引出される端部側に向けて中圧縮部分２１３ｂ及び低圧縮部分２１３ｃが形成され、より少数の露出導体部２２Ｂが引出される端部側に向けて中圧縮部分２１３ｂが形成されている。 That is, on both sides of the bottom 212 of the splice terminal 210, the middle compression portion 213b is directed toward the end portion where a larger number of exposed conductor portions 22A and 22B are drawn with reference to the highly deformed high compression portion 213a. And the low compression part 213c is formed, and the middle compression part 213b is formed toward the end part side from which a smaller number of exposed conductor parts 22B are drawn.
　本変形例によっても、圧着作業時において、スプライス端子１０の軸方向において底部１２の位置ずれを抑制でき、かつ、小さい接続抵抗と大きい固着力とを両立し易いという効果を得ることができる。 Also according to this modification, it is possible to suppress the displacement of the bottom portion 12 in the axial direction of the splice terminal 10 during the crimping operation, and to obtain an effect that it is easy to achieve both a small connection resistance and a large fixing force.
　また、図１６及び図１７に示す変形例と同様に、底部２１２の両側部のうちより多数の露出導体部２２Ａ，２２Ｂが引出される側の一端部の圧縮率を、より少数の露出導体部２２Ｂが引出される側の他端部の圧縮率よりも大きく設定している。このため、上記と同様に、複数の電線２０Ａ，２０Ｂが急激な度合で曲げられつつスプライス端子２１０で接続するように束ねられることを抑制でき、露出導体部２２Ａ，２２Ｂに加わる応力集中を緩和して、露出導体部２２Ａ，２２Ｂの破損、破断等を抑制できる。 Similarly to the modification shown in FIGS. 16 and 17, the compression rate of one end portion on the side from which a larger number of exposed conductor portions 22 </ b> A and 22 </ b> B are drawn out of both side portions of the bottom portion 212 is reduced. It is set larger than the compression rate of the other end on the side from which 22B is pulled out. For this reason, similarly to the above, the plurality of electric wires 20A and 20B can be prevented from being bundled so as to be connected by the splice terminal 210 while being bent at a rapid degree, and the stress concentration applied to the exposed conductor portions 22A and 22B is reduced. Thus, breakage, breakage, and the like of the exposed conductor portions 22A and 22B can be suppressed.
　また、本変形例では、露出導体部２２Ａ，２２Ｂが複数（ここでは３本）引出される端部側に向けて、露出導体部２２Ａ，２２Ｂの圧縮率が複数の圧縮率変更境界２１４を介して順次大きくなるように設定されている。このため、スプライス端子１０部分で、露出導体部２２Ａ，２２Ｂの圧縮率変更度合が緩やかになる。これにより、スプライス端子１０部分での露出導体部２２Ａ，２２Ｂの損傷、破断等を抑制することができる。 Further, in this modification, the compression rate of the exposed conductors 22A and 22B passes through the plurality of compression rate change boundaries 214 toward the end portion side where a plurality (three in this case) of the exposed conductors 22A and 22B are drawn. Are set to increase sequentially. For this reason, the degree of compression rate change of the exposed conductor portions 22A and 22B becomes moderate at the splice terminal 10 portion. Thereby, damage, fracture, etc. of the exposed conductor portions 22A and 22B at the splice terminal 10 portion can be suppressed.
　なお、このように、露出導体部が複数引出される端部側に向けて、露出導体部の圧縮率が複数の圧縮率変更境界を介して順次大きくなるようにする構成は、スプライス端子の両端部で同数の露出導体部が引出されている場合にも適用可能である。 Note that the configuration in which the compression ratio of the exposed conductor portion sequentially increases through the plurality of compression ratio change boundaries toward the end portion side where the plurality of exposed conductor portions are drawn out is as described above. The present invention is also applicable when the same number of exposed conductor parts are drawn out at the part.
　図２０に示す変形例は、２つの電線２０Ｃを突合わせて、電線２０Ｂに接続する場合を示している。 The modification shown in FIG. 20 shows a case where two electric wires 20C are butted and connected to the electric wire 20B.
　電線２０Ｃは、端部の被覆部２４Ｃが除去され、当該端部に露出導体部２２Ｃが形成されている。電線２０Ａは、上記実施形態で説明したものと同様である。 In the electric wire 20C, the covering portion 24C at the end is removed, and an exposed conductor portion 22C is formed at the end. The electric wire 20A is the same as that described in the above embodiment.
　２つの電線２０Ｃの露出導体部２２Ｃは、それらの先端部同士を接触させるように突合わせた状態で、電線２０Ａの露出導体部２２Ａに束ね合されている。そして、２つ露出導体部２２Ｃの先端部を高圧縮部分１３ａに達するように配設した状態で、露出導体部２２Ａ，２２Ｃに上記実施形態で説明したものと同様のスプライス端子１０が圧着接続されている。 The exposed conductor portion 22C of the two electric wires 20C is bundled with the exposed conductor portion 22A of the electric wire 20A in a state where the tip portions of the two electric wires 20C are brought into contact with each other. Then, the splice terminal 10 similar to that described in the above embodiment is crimped to the exposed conductor portions 22A and 22C in a state where the tip ends of the two exposed conductor portions 22C are disposed so as to reach the high compression portion 13a. ing.
　この変形例のように、突き合せ接続された露出導体部２２Ｃを含む場合にも、上記スプライス端子１０等を用いた接続構造を適用可能である。 As in this modification, the connection structure using the splice terminal 10 or the like can be applied even when the exposed conductor portion 22C that is butt-connected is included.
　図２１及び図２２に示す変形例は、上記実施形態と同様の電線２０Ａが４本、スプライス端子３１０にて接続された例を示している。 21 and 22 show an example in which four electric wires 20A similar to those in the above embodiment are connected by the splice terminal 310.
　すなわち、複数の電線２０Ａの各露出導体部２２Ａは、その先端部を同一方向に向けた姿勢で集合されており、当該４つの露出導体部２２Ａに一括してスプライス端子３１０が圧着されている。つまり、スプライス端子３１０の一端部（図２１及び図２２の左端部）側だけから、複数の露出導体部２２Ａが引出されている。 That is, the exposed conductor portions 22A of the plurality of electric wires 20A are assembled in such a posture that their tips are directed in the same direction, and the splice terminals 310 are collectively crimped to the four exposed conductor portions 22A. That is, a plurality of exposed conductor portions 22A are drawn out only from one end portion (left end portion in FIGS. 21 and 22) of the splice terminal 310.
　スプライス端子３１０の底部３１２の両側部は、複数の露出導体部２２Ａが引出される端部側（図２１及び図２２の左端部側）に向けて、露出導体部２２Ａの圧縮率が複数（ここでは３つ）の圧縮率変更境界３１４を介して順次大きくなるように、露出導体部２２Ａの長手方向に沿って隣設する部分間で異なる曲面形状に形成されている。すなわち、スプライス端子３１０の底部３１２の両側部は、複数の露出導体部２２Ａが引出される端部側（図２１及び図２２の左端部側）に向けて、第１圧縮部分３１３ａ、第２圧縮部分３１３ｂ、第３圧縮部分３１３ｃ、第４圧縮部分３１３ｄに形成され、この順で圧縮率が順次大きくなっている。 On both sides of the bottom 312 of the splice terminal 310, the exposed conductor portion 22A has a plurality of compression ratios (here, toward the end portion side from which the plurality of exposed conductor portions 22A are drawn out (left end portion side in FIGS. 21 and 22)). Are formed in different curved surfaces between adjacent portions along the longitudinal direction of the exposed conductor portion 22A so as to increase sequentially through three (3) compression rate change boundaries 314. That is, both side portions of the bottom portion 312 of the splice terminal 310 are directed toward the end portion side (the left end portion side in FIGS. 21 and 22) from which the plurality of exposed conductor portions 22A are drawn out. It is formed in the part 313b, the 3rd compression part 313c, and the 4th compression part 313d, and the compression rate becomes large sequentially in this order.
　この変形例のように、スプライス端子３１０の一端部からだけ、露出導体部２２Ａが引出される場合であってもよい。 As in this modification, the exposed conductor 22A may be drawn out only from one end of the splice terminal 310.
　この場合、図１８及び図１９に示す変形例と同様の理由により、スプライス端子３１０の底部３１２は、露出導体部２２Ａが引出される一端部側に向けて、露出導体部２２Ａの圧縮率が複数の圧縮率変更境界３１４を介して順次大きくなるように設定されていることが好ましい。 In this case, for the same reason as the modification shown in FIGS. 18 and 19, the bottom 312 of the splice terminal 310 has a plurality of compression ratios of the exposed conductor 22A toward the one end where the exposed conductor 22A is drawn. It is preferable that the values are set so as to increase sequentially through the compression rate change boundary 314.
　なお、上記各変形例を実施するにあたっては、下金型の下側圧着面を、スプライス端子のうち形成すべき底部形状に応じた形状にすればよい。 In carrying out each of the above modifications, the lower pressure-bonding surface of the lower mold may be shaped according to the shape of the bottom of the splice terminal.
　図２３は、上記実施形態で説明したように、２つの電線２０Ａ，２０Ｂをスプライス端子１０で圧着接続した場合において、圧縮率と接触抵抗及び固着力との関係を示している。接触抵抗及び固着力は、図２４で説明したとの同様の値を示している。圧縮率は、低圧縮部分１３ｂでの圧縮率を示している。なお、高圧縮部分１３ａの圧縮率は、低圧縮部分１３ｂでの圧縮率よりも一定の値で小さくなるように設定している。 FIG. 23 shows the relationship between the compression rate, the contact resistance, and the adhering force when the two electric wires 20A and 20B are crimped and connected by the splice terminal 10 as described in the above embodiment. The contact resistance and the adhesion force show the same values as described in FIG. The compression rate indicates the compression rate in the low compression portion 13b. The compression rate of the high compression portion 13a is set to be a constant value smaller than the compression rate of the low compression portion 13b.
　図２３を図２４と比べると、図２３で示される接触抵抗は、図２４で示される接触抵抗よりも全体的に小さくなっていることがわかる。また、図２３で示される固着力は、図２４で示される固着力よりも全体的に大きくなっていることがわかる。 23 is compared with FIG. 24, it can be seen that the contact resistance shown in FIG. 23 is generally smaller than the contact resistance shown in FIG. Further, it can be seen that the fixing force shown in FIG. 23 is generally larger than the fixing force shown in FIG.
　このため、図２３において、電線の配線対象箇所に関して必要とされる上限の接触抵抗Ｌ１、下限の固着力Ｌ２を満たす圧縮率の範囲Ｅ２は、図２４における条件成立範囲Ｅ１よりも広くなる。このため、製造上の設定管理等が容易になることがわかる。 For this reason, in FIG. 23, the compression rate range E2 that satisfies the upper limit contact resistance L1 and the lower limit fixing force L2 required for the wiring target portion of the wire is wider than the condition establishment range E1 in FIG. For this reason, it turns out that the setting management on manufacture etc. become easy.
　以上のようにこのスプライス接続電線及びスプライス接続電線の製造方法は詳細に説明されたが、上記した説明は、すべての局面において、例示であって、この発明がそれに限定されるものではない。例示されていない無数の変形例が、この発明の範囲から外れることなく想定され得るものと解される。 As described above, the splice connection wire and the method for manufacturing the splice connection wire have been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

Claims (6)

  1. 　露出導体部を有する複数の電線と、
    　底部と前記底部の両側部に設けられた一対の圧着片とを有し、複数の前記露出導体部が前記底部と前記一対の圧着片との内部に配設された状態で、前記一対の圧着片が内向きに変形されて複数の前記露出導体部に圧着されたスプライス端子と、
    　を備え、
    　前記底部の幅方向略中央部は、前記露出導体部の長手方向に沿って段差無しに連なり、かつ、前記底部の両側部は、前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に形成されている、スプライス接続電線。     A plurality of electric wires having exposed conductor portions;
    A pair of crimping pieces provided on both sides of the bottom part and the bottom part, and a plurality of the exposed conductor parts are disposed inside the bottom part and the pair of crimping pieces. A splice terminal in which a piece is deformed inward and crimped to the plurality of exposed conductor parts;
    With
    The substantially central portion in the width direction of the bottom portion is continuous without a step along the longitudinal direction of the exposed conductor portion, and both side portions of the bottom portion are adjacent to each other along the longitudinal direction of the exposed conductor portion. Splice connection wires formed in different curved shapes.
  2. 　請求項１記載のスプライス接続電線であって、
    　前記底部の両側部は、前記露出導体部が引出される端部側に向けて、前記露出導体部の圧縮率が順次大きくなるように、前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に形成されている、スプライス接続電線。     The splice connecting wire according to claim 1,
    The both side portions of the bottom portion are adjacent along the longitudinal direction of the exposed conductor portion so that the compression ratio of the exposed conductor portion sequentially increases toward the end portion side where the exposed conductor portion is drawn out. Splice connection wires that are formed in different curved shapes.
  3. 　請求項１記載のスプライス接続電線であって、
    　前記スプライス端子の両端部のそれぞれから、複数の前記露出導体部のいずれかが引出され、
    　前記底部の両側部は、その両端部側に向けて、前記露出導体部の圧縮率が順次大きくなるように、前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に形成されている、スプライス接続電線。     The splice connecting wire according to claim 1,
    From each of both ends of the splice terminal, one of the plurality of exposed conductor portions is drawn out,
    Both side portions of the bottom portion are formed in different curved shapes between adjacent portions along the longitudinal direction of the exposed conductor portion so that the compressibility of the exposed conductor portion sequentially increases toward both end portions thereof. The splice connecting wire.
  4. 　請求項１記載のスプライス接続電線であって、
    　前記底部の両側部は、前記露出導体部が複数引出される端部側に向けて、前記露出導体部の圧縮率が複数の圧縮率変更境界を介して順次大きくなるように、前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に形成されている、スプライス接続電線。     The splice connecting wire according to claim 1,
    The exposed conductor portions are arranged so that the compression ratio of the exposed conductor portions sequentially increases via a plurality of compression rate change boundaries toward the end portion side where the plurality of exposed conductor portions are drawn out. The splice connection electric wire is formed in a curved surface shape that is different between adjacent portions along the longitudinal direction of the wire.
  5. 　請求項１記載のスプライス接続電線であって、
    　前記スプライス端子の両端部から前記露出導体部が異なる数で引出され、
    　前記底部の両側部のうちより多数の露出導体部が引出される端部側の圧縮率は、より少数の露出導体部が引出される端部側の圧縮率よりも大きい、スプライス接続電線。     The splice connecting wire according to claim 1,
    The exposed conductor portions are drawn out in different numbers from both ends of the splice terminal,
    The splice connection electric wire in which the compression rate on the end portion side where a larger number of exposed conductor portions are drawn out of both side portions of the bottom portion is larger than the compression rate on the end portion side where a smaller number of exposed conductor portions are drawn.
  6. 　複数の電線の露出導体部に、底部と前記底部の両側部に設けられた一対の圧着片とを有するスプライス端子を圧着するスプライス接続電線の製造方法であって、
    　第１のダイ上に載置状に前記スプライス端子を支持すると共に、前記底部と前記一対の圧着片との内部に複数の前記露出導体部を配設する工程と、
    　前記第１のダイに対して第２のダイを接近移動させることで、前記第２のダイにより前記一対の圧着片を内向きに変形させると共に、前記第１のダイにより前記底部を、その幅方向略中央部で前記露出導体部の長手方向に沿って段差無しに連なり、かつ、その両側部で前記露出導体部の長手方向に沿って隣設する部分間で異なる曲面形状に変形させて、前記スプライス端子を複数の前記露出導体部に圧着する工程と、
    　を備えるスプライス接続電線の製造方法。     A method of manufacturing a splice connection electric wire for crimping a splice terminal having a bottom portion and a pair of crimp pieces provided on both side portions of the bottom portion on an exposed conductor portion of a plurality of electric wires,
    A step of supporting the splice terminal in a mounting manner on the first die and disposing a plurality of the exposed conductor portions inside the bottom portion and the pair of crimping pieces;
    By moving the second die closer to the first die, the pair of crimping pieces are deformed inward by the second die, and the bottom portion of the pair is pressed by the first die. In a substantially central part in the direction, it is continuous without a step along the longitudinal direction of the exposed conductor part, and on both sides thereof, it is transformed into a different curved surface shape between adjacent parts along the longitudinal direction of the exposed conductor part, Crimping the splice terminal to the plurality of exposed conductor parts;
    A method of manufacturing a splice connecting wire comprising:
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CN102931562A (en) * 2011-08-11 2013-02-13 桂林长海科技有限责任公司永福分公司 Two-wire overlapped terminal crimping mechanism
US9853367B2 (en) 2013-11-01 2017-12-26 Furukawa Electric Co., Ltd. Wire harness, method of connecting terminal and coated wire, and mold
CN104701641A (en) * 2013-12-09 2015-06-10 住友电装株式会社 Wire fixing structure
CN104701641B (en) * 2013-12-09 2017-09-15 住友电装株式会社 The fixed structure of electric wire
CN108011201A (en) * 2017-12-19 2018-05-08 上海晗普新材料科技有限公司 A kind of staged heat shrinkable terminal
CN108011201B (en) * 2017-12-19 2023-08-29 苏州晗普新材料科技有限公司 Stepped heat shrinkage terminal
US11011858B2 (en) 2018-06-06 2021-05-18 Te Connectivity India Private Limited Multiple bussed terminations

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