JP2018037137A - Conducting path for earth and terminal fitting for earth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow for fastening multiple types of electric wires having different external dimensions, to a crimp part having a pair of caulking pieces.SOLUTION: A conductor for earth includes: two electric wires 11, 21; a terminal fitting for earth 30 having an open barrel crimp part 33 formed at the rear end; a pair of rear side caulking pieces 40, 45 constituting a crimp part, formed to circumferentially extend from the left and right side edges of a rear side substrate part 39 (substrate part), and fastening the two electric wires 11, 21 to the crimp part 33 while clamping individually between the rear side substrate part 39; and a wire presser 42 formed in the rear side caulking piece 40, and capable of displacing between a flush form flush with the rear side caulking piece 40, and a curvature form projecting radially inward from the rear side caulking piece 40.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a grounding conductive path and a grounding terminal fitting.

  Patent Document 1 discloses a grounding conductive path in which front ends of two electric wires are fixed to a crimping portion formed at a rear end of a grounding terminal. The crimping portion has an open barrel shape in which a pair of caulking pieces are extended from the left and right side edges of the substrate portion. The pair of crimping pieces are crimped so as to individually surround the two electric wires.

Japanese Patent Laid-Open No. 08-250165

  The crimping portion assumes that the pair of caulking pieces has a symmetrical shape, and the outer diameters of the two electric wires have the same dimensions. Therefore, when trying to crimp a thin electric wire to one caulking piece, there is a concern that the extended end of the caulking piece hits the substrate portion and the thin electric wire cannot be securely fixed.

  As a countermeasure, it is only necessary to set the length of each crimping piece according to the outer diameter dimension of the two electric wires. Then, the length of the crimping piece is set according to the outer diameter dimension of the two electric wires. A plurality of types of grounding terminals that have been set must be prepared, resulting in increased costs.

  This invention is completed based on the above situations, Comprising: It aims at making it possible to adhere to the crimping | compression-bonding part which has a pair of crimping piece several types of electric wire from which an outer diameter differs.

The grounding conductive path of the first invention is:
Multiple wires,
A grounding terminal fitting having an open barrel-shaped crimping portion formed at the rear end;
The crimping portion is configured to extend from the left and right side edges of the substrate portion in the circumferential direction, and is fixed to the crimping portion while the plurality of electric wires are individually sandwiched between the substrate portions. A pair of caulking pieces;
An electric wire that is formed on at least one of the pair of crimping pieces and is displaceable between a flat form that is flush with the crimping piece and a bent form that protrudes radially inward from the crimping piece. It has a feature in that it has a holding part.

The ground terminal fitting of the second invention is
An open barrel-shaped crimping part formed at the rear end;
A pair that constitutes the crimp part and is formed so as to extend from the left and right side edges of the board part in the circumferential direction, and is fixed to the crimp part in a state where a plurality of electric wires are individually sandwiched between the board parts. And the caulking piece
An electric wire that is formed on at least one of the pair of crimping pieces and is displaceable between a flat form that is flush with the crimping piece and a bent form that protrudes radially inward from the crimping piece. It has a feature in that it has a holding part.

  When fixing the thick electric wire to the crimping portion, the electric wire is held by making the electric wire pressing portion flush with the inner surface of the crimping piece on the outer periphery of the electric wire. When a thin electric wire is fixed to the crimping portion, the electric wire is held by making the electric wire pressing portion into a bent form and abutting the tip of the electric wire pressing portion against the outer periphery of the electric wire. According to the present invention, a plurality of types of electric wires having different thicknesses can be fixed to the crimping part by setting the electric wire pressing part to one of a flat form and a bent form.

The top view of the electrically conductive path for earth | ground showing the state which fixed the two electric wires from which an outer diameter differs in Example 1 to the terminal fitting for earth | grounding AA line sectional view of FIG. BB sectional view of FIG. CC sectional view of FIG. Plan view of grounding conductive path showing the state that the wire holding part is flush. DD sectional view of FIG. EE line sectional view of FIG. A plan view of the grounding conductive path showing the state where two wires with the same outer diameter are fixed to the grounding terminal fitting FF sectional view of FIG.

  In the first and second inventions, the electric wire pressing portion in a bent form may sandwich the electric wire between the substrate portion. According to this structure, an electric wire can be reliably hold | maintained between a board | substrate part and an electric wire holding | suppressing part.

  1st and 2nd invention WHEREIN: The contact part contact | abutted on the outer periphery of the said electric wire in the bending form among the said electric wire holding | suppressing parts may become the form bent in the folding shape. According to this structure, it can avoid that the outer periphery of an electric wire is damaged by the contact part of an electric wire holding | suppressing part.

  The first and second inventions may be such that the wire pressing portion extends in a cantilevered manner from the outer peripheral edge of the crimping piece. According to this structure, since the electric wire holding | suppressing part is extended in the cantilever form from the outer peripheral edge part of the crimping | crimping piece, it is easy to change an electric wire holding | suppressing part from a flush form to a bent form.

<Example 1>
A first embodiment of the present invention will be described below with reference to FIGS. In the following description, the left and right directions in FIGS. For the up and down directions, the directions appearing in FIGS. For the left and right directions, the directions appearing in FIGS. 2, 6, and 8 are defined as left and right as they are.

  The ground conductive path 10 of the first embodiment includes one first electric wire 11 (the electric wire recited in the claims), one second electric wire 21 (the electric wire recited in the claims), and one earth. The terminal fitting 30 is provided and these are integrated. The first electric wire 11 is a covered electric wire in which the first conductor 12 is surrounded by the first insulating coating 13. At the front end portion of the first electric wire 11, the first insulating coating 13 is removed and the first conductor 12 is exposed. The second electric wire 21 is a covered electric wire in which the second conductor 22 is surrounded by the second insulating coating 23. At the front end portion of the second electric wire 21, the second insulating coating 23 is removed and the second conductor 22 is exposed. The outer diameter of the first electric wire 11 (first insulating coating 13) is smaller than the outer diameter of the second electric wire 21 (second insulating coating 23).

  The grounding terminal fitting 30 is a single part formed by bending a metal plate material punched into a predetermined shape. The grounding terminal fitting 30 includes a grounding connection portion 31 disposed in the front end side region and an open barrel-like crimping portion 33 disposed in the rear end side region. The ground connection portion 31 has a horizontal flat plate shape and has a circular mounting hole 32 penetrating in the plate thickness direction. The grounding terminal 31 is brought into contact with the grounding part (not shown) in a state of contact with the grounding part and a bolt (not shown) and a nut (not shown) inserted through the mounting hole 32 are tightened. It is connected to the grounding portion so as to be conductive.

  The crimping portion 33 includes a wire barrel portion 34 that is continuous with the rear end of the ground connection portion 31 and an insulation barrel portion 38 that is continuous with the rear end of the wire barrel portion 34. The wire barrel portion 34 includes a front substrate portion 35 that extends rearward from the rear end portion of the ground connection portion 31 and a left-right symmetrical portion that extends in a cantilevered manner from both left and right edges of the front substrate portion 35. It is comprised from a pair of front side crimping piece 36. FIG.

  The first conductor 12 is fixed to the wire barrel portion 34 so as to be conductive by being surrounded by the right region of the front substrate portion 35 and the right front caulking piece 36. The second conductor 22 is surrounded by the left region of the front substrate portion 35 and the left front caulking piece 36 so as to be fixed to the wire barrel portion 34 so as to be conductive.

  The insulation barrel portion 38 includes a substantially flat plate-like rear substrate portion 39 (substrate portion described in claims) extending rearward from the rear end of the front substrate portion 35 and a rear substrate portion 39. The rear first caulking piece 40 (clamping piece described in claims) extending in a cantilevered manner from the left edge in the circumferential direction and the cantilever extending in the circumferential direction from the right edge of the rear substrate portion 39. A rear second caulking piece 45 (a caulking piece described in claims) is provided. Here, the circumferential direction is defined as a direction surrounding the first electric wire 11 or the second electric wire 21.

  The extension dimension of the rear first caulking piece 40 from the rear substrate part 39 (the dimension in the circumferential direction when fixed to the first electric wire 11) and the second rear caulking piece 45 from the rear board part 39. The extension dimension (circumferential dimension in a state of being fixed to the first electric wire 11) is substantially (substantially) the same dimension. Therefore, in a state where the first electric wire 11 and the second electric wire 21 are not fixed to the crimping portion 33, the rear first caulking piece 40 and the rear second caulking piece 45 have a symmetrical shape.

  The outer edge portion of the rear first caulking piece 40 includes a front edge portion 41F extending in the circumferential direction and continuing to the rear substrate portion 39, a rear edge portion 41R extending in the circumferential direction and continuing to the rear substrate portion 39, and a front edge It is comprised from the extended edge part 41S which connects the extended ends of the part 41F and the rear edge part 41R. The rear first caulking piece 40 is integrally formed with one electric wire pressing portion 42 that extends rearward from the rear edge portion 41R in the axial direction and in a cantilever manner. In the state immediately after the crimping portion 33 is formed (the state in which the first electric wire 11 and the second electric wire 21 are not fixed to the crimping portion 33), the electric wire pressing portion 42 is the rear first caulking as shown in FIGS. It is in the form of a flat surface that is continuous with the piece 40.

  8 and 9, the wire pressing portion 42 extends straight rearward over its entire length. When the rear end portion (extending end portion) of the wire pressing portion 42 is deformed in close contact with the inner surface side from this state, the contact portion is brought into contact with the rear end portion of the wire pressing portion 42 as shown in FIGS. 43 is formed. The outer surface of the contact portion 43 (the surface that contacts the outer periphery of the first insulating coating 13) is a smooth contact surface 44 having a substantially semicircular arc shape. When the electric wire pressing part 42 is in the same form, the contact surface 44 faces substantially rearward. When the wire pressing portion 42 having the same shape is bent substantially perpendicularly to the inner surface side of the rear first caulking piece 40, the wire pressing portion 42 is bent as shown in FIGS.

  The insulation barrel portion 38 in a state in which the front end portion of the second insulating coating 23 of the second electric wire 21 is surrounded by the rear substrate portion 39 (the substrate portion described in claims) and the rear second caulking piece 45. It is fixed to. The process of fixing the second insulating coating 23 (second electric wire 21) to the insulation barrel portion 38 is performed in a crimping process by an automatic machine (not shown). At the time of crimping, the second insulating coating 23 is placed in the right region of the rear substrate part 39, and the right edge of the rear substrate part 39 is deformed so as to be lifted upward. The piece 45 is deformed so as to cover the second insulating coating 23 from above.

  As a result, the second insulating coating 23 is vertically sandwiched between the rear substrate portion 39 and the rear second caulking piece 45, and as shown in FIGS. The side second caulking piece 45 is fixed to the second insulating coating 23 in a state of being surrounded over approximately 3/4 of the outer periphery thereof. Thereby, the 2nd insulation coating 23 (2nd electric wire 21) and the insulation barrel part 38 are hold | maintained in the state by which the relative displacement to the front-back direction (axial direction) was controlled. In the fixed state, the extending end portion of the rear second caulking piece 45 extends toward the first electric wire 11 (first insulating coating 13), but is in contact with the outer periphery of the first insulating coating 13. Absent.

  The front end portion of the first insulating coating 13 in the first electric wire 11 is surrounded by the rear substrate portion 39 and the rear first caulking piece 40 and is pressed by the electric wire holding portion 42 in the insulation barrel portion. 38 is fixed. The process which adheres the 1st insulation coating 13 (1st electric wire 11) to the insulation barrel part 38 is performed by the crimping | compression-bonding process by an automatic machine (illustration omitted) similarly to the 1st electric wire 11. FIG. At the time of crimping, the first insulating coating 13 is placed on the left region of the rear substrate portion 39, and the left edge portion of the rear substrate portion 39 is deformed so as to be lifted upward, and the rear first caulking is performed. The piece 40 is curved and deformed so as to cover the first insulating coating 13 from above while reducing the radius of curvature. Thereby, the 1st insulating coating 13 is distribute | arranged between the back side board | substrate part 39 and the back side 1st crimping piece 40 in the up-down direction.

  In the step of bending and deforming the rear first caulking piece 40, the curvature of the rear first caulking piece 40 after deformation is made to be symmetrical with the curvature of the deformed rear second caulking piece 45. As shown in FIGS. 2 and 6, the extending end edge portion 41 </ b> S of the rear first caulking piece 40 is brought into contact with the extending end edge of the rear second caulking piece 45. Since the outer diameter of the first electric wire 11 (first insulating coating 13) is smaller than the outer diameter of the second electric wire 21 (second insulating coating 23), the upper surface of the first insulating coating 13 is shown in FIGS. A gap 46 in the barrel is vacant between the inner portion and the inner surface portion (lower surface portion) of the rear first caulking piece 40. Further, the first electric wire 11 and the second electric wire 21 are in a non-contact positional relationship, and a gap 37 between the first electric wire 11 and the second electric wire 21 is vacant. In addition, the 1st conductor 12 and the 2nd conductor 22 may be fixed in the state which contacted directly.

  In the step of deforming the rear first caulking piece 40, the electric wire pressing portion 42 itself remains in a flush state, but a substantially semicircular arc contact portion 43 is formed at the rear end portion of the electric wire pressing portion 42. ing. In a state where the deformation of the rear first caulking piece 40 is completed, as shown in FIGS. 5 and 7, the wire pressing portion 42 is axially rearward from the rear edge portion 41 </ b> R of the rear first caulking piece 40 (first It is in a state of extending in a cantilevered manner in a direction parallel to the axis of the electric wire 11.

  After the rear first caulking piece 40 is deformed, the flat-shaped electric wire pressing portion 42 is bent at a substantially right angle inward in the radial direction to obtain a bent shape. By this bending process, as shown in FIGS. 2 and 3, the contact portion 43 at the tip of the wire pressing portion 42 faces downward and presses against the outer periphery of the first electric wire 11 (first insulating coating 13) from above. Abut. The state in which the first electric wire 11 is restricted from being displaced relative to the insulation barrel portion 38 in the axial direction (front-rear direction) and in the direction intersecting the axis (vertical direction and left-right direction) by the contact of the electric wire holding portion 42. To be fixed to the crimping portion 33.

  Further, not only one first electric wire 11 and one second electric wire 21 can be fixed to the crimping portion 33 of the ground terminal fitting 30 as described above, but also as shown in FIGS. Two second electric wires 21 can be fixed. In this case, the electric wire pressing part 42 is made flush with the folded contact part 43 being formed, and the rear first caulking piece 40 is deformed in this state. Thus, similarly to the rear second caulking piece 45, the rear first caulking piece 40 is crimped so as to sandwich the second electric wire 21 (second insulating coating 23) with the rear substrate portion 39. The part 33 is fixed. In the fixed state, the inner surface of the wire pressing portion 42 comes into contact with the outer periphery of the second insulating coating 23 so as to press it in a surface contact state. As described above, the grounding conductor 50 having a different form from the grounding conductive path 10 shown in FIGS.

  As described above, the ground conductive path 10 of the first embodiment includes the first electric wire 11, the second electric wire 21 that is thinner than the first electric wire 11, and one earth terminal fitting 30. An open barrel-shaped crimping portion 33 is formed at the rear end portion of the ground terminal fitting 30, and the crimping portion 33 includes a wire barrel portion 34 and an insulation barrel portion 38. The insulation barrel portion 38 extends from the left side edge of the rear substrate portion 39 in the circumferential direction and extends from the right side edge of the rear substrate portion 39 in the circumferential direction. And a rear second caulking piece 45 formed in such a manner.

  The first caulking piece 40 and the second caulking piece sandwich the first electric wire 11 (first insulating coating 13) and the second electric wire 21 (second insulating coating 23) between the rear substrate portion 39 individually. It adheres to the crimping part 33 in a state. The rear first caulking piece 40 has a flat surface that is flush with the rear first caulking piece 40 and the first electric wire 11 (first inward in the radial direction from the rear first caulking piece 40. An electric wire pressing part 42 is formed that is displaceable between the bent form protruding toward the insulating coating 13).

  When the thin first electric wire 11 and the thick second electric wire 21 are fixed to the crimping portion 33 (insulation barrel portion 38), the rear substrate portion 39 and the rear second caulking piece 45 are used for the second electric wire 21. It can be fixed by surrounding. On the other hand, for the narrower first electric wire 11, the rear first caulking piece 40 is deformed with a left-right symmetric curvature with respect to the rear second caulking piece 45.

  At this time, the in-barrel gap 46 is vacant between the first electric wire 11 and the rear first caulking piece 40, but the tip end portion of the electric wire pressing portion 42 protruding radially inward from the rear first caulking piece 40, It presses so that the outer periphery of the 1st electric wire 11 (1st insulation coating 13) may butt against radial direction. Accordingly, the first electric wire 11 is sandwiched between the electric wire pressing portion 42 and the rear substrate portion 39 in the vertical direction (radial direction), and is fixed to the crimping portion 33.

  Further, when the two thick second electric wires 21 are fixed to the crimping portion 33, the electric wire pressing portion 42 is made flush with the rear first caulking piece 40, and the rear first caulking piece 40 is bent and deformed. The second electric wire 21 is surrounded together with the rear substrate portion 39. Thus, the second electric wires 21 are fixed to both the rear first caulking piece 40 and the rear second caulking piece 45, respectively.

  As described above, the grounding conductive path 10 of the present embodiment has two types of electric wires (the first electric wire 11 and the first electric wire 11) having different thicknesses by setting the electric wire holding portion 42 to one of a flat form and a bent form. The second electric wire 21) can be fixed to the crimping part 33.

  In a state where the thin first electric wire 11 is held by the rear first caulking piece 40, the bent electric wire holding portion 42 sandwiches the first electric wire 11 in the radial direction with the rear substrate portion 39. Therefore, the first electric wire 11 can be reliably held between the rear substrate portion 39 and the electric wire pressing portion 42.

  Further, the contact portion 43 that contacts the outer periphery of the first electric wire 11 in the bent shape of the wire holding portion 42 is bent in a folded shape, and forms a substantially semicircular arc shape of the contact portion 43. The contact surface 44 comes into contact with the outer periphery of the first insulating coating 13. Thereby, it is avoided that the outer periphery of the 1st electric wire 11 is damaged by the contact part 43 of the electric wire holding | suppressing part 42. FIG.

  Moreover, since the electric wire holding | suppressing part 42 is the form extended from the outer peripheral edge part (rear edge part 41R) of the rear side 1st crimping piece 40 in the cantilever form, the electric wire holding | maintenance part 42 is changed from a flat form to a bent form. There is no possibility that the processing machine interferes with the rear first caulking piece 40 during the deformation. Therefore, the process which deform | transforms the electric wire holding | suppressing part 42 from a flush form to a bending form becomes easy.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, one electric wire pressing portion is formed on one outer edge portion (rear edge portion) of the rear first caulking piece (caulking piece), but one outer edge portion (front edge portion, rear edge portion). A plurality of wire pressing portions may be formed on the portion and the extended end edge portion).
(2) In the above-described embodiment, the wire pressing portion is formed only on the rear edge portion among the three outer edge portions of the rear first caulking piece (caulking piece), but the electric wire pressing portion is the front of the three outer edge portions. You may form only in an edge part and may form only in an extended edge part.
(3) In the above-described embodiment, only one edge portion (rear edge portion) of the three outer edge portions (front edge portion, rear edge portion, and extended end edge portion) of the rear first caulking piece (caulking piece). However, the electric wire holding part may be formed on any two outer edge parts among the three outer edge parts, or may be formed on all three outer edge parts.
(4) In the above embodiment, the wire pressing portion is formed on only one of the pair of rear caulking pieces (crimping pieces) (the rear first caulking piece). You may form in both a back side crimping piece (caulking piece). In this case, the position and number of the wire pressing portions formed on one rear caulking piece (rear side first caulking piece) are the same as those of the electric wire pressing portion formed on the other rear caulking piece (rear side second caulking piece). The position and number may be the same or different.
(5) In the above embodiment, the wire pressing portion is arranged at a position closer to the extending end side than the base end portion of the rear first caulking piece (caulking piece). In the case where the electric wire holding part is arranged on the extended end edge of the rear first caulking piece, the electric wire is held between the electric wire holding part and the base end part of the rear first caulking piece. It may be like this.
(6) In the above embodiment, the wire pressing portion protrudes from the outer edge portion of the rear first caulking piece (caulking piece), but the electric wire pressing portion is surrounded by a substantially U-shaped slit formed in the caulking piece. This part may be made to function as an electric wire pressing part.
(7) In the said Example, although the electric wire holding | suppressing part was formed only in the rear side crimping piece (rear side 1st crimping piece) which comprises an insulation barrel part, an electric wire holding part is the front side crimping which comprises a wire barrel part. It can also be formed on a piece. In this case, the conductor of the electric wire is preferably not a stranded wire but a single core wire.
(8) In the above embodiment, two electric wires are individually fixed to the pair of caulking pieces, but three or more electric wires may be fixed to the pair of caulking pieces. In this case, one electric wire may be fixed to one caulking piece, and a plurality of electric wires may be fixed together to the other caulking piece, or plural electric wires may be fixed to both caulking pieces, respectively. May be.

10: Conductor for ground 11 ... First electric wire (electric wire)
21 ... Second electric wire (electric wire)
30 ... Terminal fitting for grounding 33 ... Crimp part 39 ... Back side board part (board part)
40 ... rear side first caulking piece (caulking piece)
42 ... Electric wire holding part 43 ... Contact part 45 ... Rear side second caulking piece (crimping piece)

Claims (5)

Multiple wires,
A grounding terminal fitting having an open barrel-shaped crimping portion formed at the rear end;
The crimping portion is configured to extend from the left and right side edges of the substrate portion in the circumferential direction, and is fixed to the crimping portion while the plurality of electric wires are individually sandwiched between the substrate portions. A pair of caulking pieces;
An electric wire that is formed on at least one of the pair of crimping pieces and is displaceable between a flat form that is flush with the crimping piece and a bent form that protrudes radially inward from the crimping piece. A grounding conductor comprising a pressing portion.   2. The grounding conductor according to claim 1, wherein the electric wire pressing portion in a bent form sandwiches the electric wire between the substrate portion and the electric wire holding portion.   The grounding conductor according to claim 1 or 2, wherein a contact portion that contacts the outer periphery of the electric wire in a bent form among the electric wire pressing portions is bent in a folded shape.   4. The grounding conductor according to claim 1, wherein the electric wire pressing portion is in a cantilever shape extending from an outer peripheral edge portion of the caulking piece. 5. An open barrel-shaped crimping part formed at the rear end;
A pair that constitutes the crimp part and is formed so as to extend from the left and right side edges of the board part in the circumferential direction, and is fixed to the crimp part in a state where a plurality of electric wires are individually sandwiched between the board parts. And the caulking piece
An electric wire that is formed on at least one of the pair of crimping pieces and is displaceable between a flat form that is flush with the crimping piece and a bent form that protrudes radially inward from the crimping piece. A grounding terminal fitting comprising a holding portion.

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