JP6505144B2 - Terminal bracket connection structure and connection method - Google Patents

Description

  The present invention relates to a connection structure and a connection method of a terminal fitting, and a temporary locking structure and a temporary locking method of a terminal fitting and a connection terminal.

  By overlapping connection plates of a plurality of terminal fittings to which grounding wires are connected, inserting a common bolt into a mounting hole provided in the connection plate and bolting it to a ground plane (such as a predetermined location on a vehicle) There is known a connection structure in which a plurality of grounding wires are collectively conducted to the ground plane via the stacked terminal fittings (see, for example, Patent Document 1).

Unexamined-Japanese-Patent No. 2006-40759

  However, in the case of the above structure in which the terminal fittings are stacked and fastened with bolts, the terminal fittings connected to each grounding wire are stacked and bolted, so that the weight increases as the number of grounding wires increases. Furthermore, as the number of grounding wires increases, the thickness of the stacked terminal fittings must be increased, and a large space for accommodating these terminal fittings must be secured above the ground plane. In addition, since the tightening operation is performed after the nut length and the bolt length associated with the lamination of the terminal metal fitting are combined, it takes time for the operation.

  Moreover, in the case of bolting, the connection reliability after connection may be reduced by loosening the bolt. Therefore, a strong connection structure can be obtained if the connection terminal to which the electric wire is connected is crimped and fastened to the terminal metal fitting, but when crimping with a crimping machine, the posture of each other is not stable and the crimp strength There is a risk of variations in

  The present invention has been made in view of the above-described circumstances, and its object is to crimp a plurality of connection terminals connected with the wire to a terminal metal fitting and fasten the plurality of wires collectively. It is an object of the present invention to provide a connection structure and a connection method of a terminal fitting which can be conductively connected with reliability, and a temporary locking structure and a temporary locking method of the terminal fitting and the connection terminal.

The object of the present invention described above can be achieved by the following configurations (1) to (9).
(1) A terminal fitting including a terminal body and a plurality of terminal connection portions extended from the terminal body;
And a connection terminal connected to the end of the wire;
In the connection terminal, there is formed a holding space defined by folding back the upper end portions of a pair of fastening caulking pieces which are erected on both sides and capable of caulking and fastening the connecting terminal to the terminal fitting. And
A pair of to-be-fastened fastening pieces accommodated in the holding space are erected on both sides of the terminal connection portion,
A temporary engagement between the to-be-fastened caulking piece and the to-be-fastened caulking piece that engages with or disengages the to-be-fastened caulking piece when the to-be-fastened caulking piece is accommodated in the holding space. A temporary locking structure of a terminal fitting and a connection terminal characterized in that a mechanism is provided.

In the temporary locking structure of the terminal metal fitting and the connection terminal of the configuration of the above (1), before the connection metal terminal is crimped and fastened to the terminal metal fitting, the fastening screw for the screw fastening piece and the connection terminal in the terminal connection portion of the terminal metal fitting The fastening piece is brought into a temporarily locked state that can be disengaged by the temporary locking mechanism.
Therefore, the harness in which the terminal metal fitting and the plurality of connection terminals are temporarily engaged can be moved between processes, and the connection terminal can be crimped and fastened to the terminal metal fitting in a later process. Work freedom is increased. In addition, since the terminal metal fitting in the temporary engagement state and the plurality of connection terminals can be freely engaged and disengaged, the continuity check of the harness is performed in the temporary engagement state, and circuit correction is also performed when the terminal metal fitting and the connection terminal are misconnected. It is easy.

In addition, as the temporary locking mechanism, the terminal fitting and the plurality of connection terminals are temporarily locked by providing the engagement protruding portion in contact with the electric wire side surface of the fastening and caulking piece to the fastening and caulking piece. be able to. That is, the engagement protrusion can be easily formed on the fastening and caulking piece by press processing or the like, and an increase in processing cost can be suppressed.
Furthermore, the engagement protrusion is formed on the upper end portion of the fastened and tightened piece, and is configured by the locking arm that can be bent and deformed in the unlocking direction, thereby inserting the fastened and tightened piece into the holding space Insertion force can be reduced.
Moreover, the insertion guide at the time of inserting a to-be-fastened caulking piece in the holding space is formed at the front end portion of the terminal connection portion by forming a distal end narrowing-like insertion guide that is guided when inserted into the holding space. It is possible to improve the quality.

(2) The temporary locking mechanism
An engagement protrusion which is provided so as to protrude from the tip of the upper end of the pair of fastening caulking pieces so as to abut on the electric wire side surface of the pair of fastening caulking pieces;
In order to avoid interference when the end of the terminal connection portion is inserted in an oblique direction with respect to the holding space, a relief formed in the end on the bottom side of the pair of fastening tightening pieces Department,
A temporary locking structure of the terminal fitting and the connection terminal according to the above (1), characterized in that:

In the temporary locking structure of the terminal metal fitting and the connection terminal of the configuration of the above (2), the tip of the terminal connection portion in which the engagement projection is provided and the escape portion is formed on the bottom side of the fastening caulking piece Is inserted into the holding space of the connection terminal while being rotated (rocked) along the insertion direction from an oblique direction.
Therefore, the projecting height of the engaging projection can be made higher than when the distal end of the terminal connection portion is inserted straight from the axial direction into the holding space of the connection terminal, and the connection in the provisionally locked state The holding force (temporary locking force) of the terminal connection portion to the terminal can be increased. Moreover, the insertion force when the tip of the terminal connection portion is inserted into the holding space of the connection terminal can be reduced, and smooth insertion becomes possible.

(3) The temporary locking mechanism
It has a pair of engaging projection parts protrudingly provided in the tip part in the upper end part of the above-mentioned to-be-fastened caulking piece so as to respectively oppose the both sides along the connection direction of the above-mentioned connection terminal in the above-mentioned fastening caulking piece The temporary locking structure of the terminal metal fitting and connection terminal as described in said (1) characterized by the above-mentioned.

In the temporary locking structure of the terminal metal fitting and the connection terminal of the configuration of (3), the fastening and caulking pieces of the connection terminal are connected in the connection direction by the pair of engaging projecting portions provided to project from the tip of the terminal connection portion. In the state of being positioned with respect to the other, the temporary locking state is made.
Then, the positioning accuracy at the time of caulking and fastening the fastening caulking piece of the connection terminal to the fastening caulking piece of the terminal fitting is improved, and the connecting terminal can be caulked and fixed to the terminal connection portion of the terminal fitting with high accuracy. it can.

(4) The temporary locking mechanism
It has an engaging projection formed by cutting and raising the tip to the side of the tip end of the upper end of the to-be-fastened caulking piece so as to abut only on the electric wire side surface of one of the fastening and caulking pieces. The temporary locking structure of the terminal metal fitting and connection terminal as described in said (1) characterized by the above-mentioned.

  In the temporary locking structure of the terminal metal fitting and the connection terminal of the configuration of the above (4), the engagement projection piece is formed of the pair of fastening and caulking pieces when the tip end portion of the terminal connection portion is inserted into the holding space of the connection terminal. Since it can pass between, even if it raises protrusion height, smooth insertion is attained by low insertion force. In addition, the engagement protrusion piece is made to face the electric wire side surface so as to intersect with one of the fastening and caulking pieces by the connection terminal being rotated about the axis along the insertion direction of the terminal connection portion. The connection terminal can be reliably temporarily engaged with the distal end portion of the connection portion.

(5) The pair of fastening and caulking pieces in the connection terminal according to any one of the above (1) to (4) is caulked on the to-be-fastened caulking piece, and the connection terminal is connected to the connection terminal The terminal metal fitting connection structure characterized in that

In the connection structure of the terminal fitting of the configuration of (5), when the terminal fitting is connected to the plurality of electric wires through the connection terminal, the electrical connection reliability is maintained by caulking.
Also, when the fastening caulking piece is caulked to the fastening caulking piece, the to-be-fastened caulking piece and the fastening caulking piece are temporarily locked, so the positional deviation during caulking may occur. It is possible to suppress defects that cause variations in crimp strength. Furthermore, the plurality of connection terminals can be crimped and fixed to the terminal fitting at the same time by temporarily fastening the to-be-fastened fastening pieces and the fastening and fastening pieces to the terminal fitting.
As a result, the connection terminal can be crimped to and fastened to the terminal fitting, and a plurality of electric wires can be collectively connected to the terminal fitting. As compared with the structure in which the terminal fittings connected to the respective wires are overlapped and fastened and conducted by this, it is not necessary to overlap the terminal fittings, so the increase in the weight of the terminal fitting is suppressed even if the number of wires increases. it can. Further, since it is not necessary to overlap the terminal fittings, the thickness of the terminal fittings is not increased even if the number of electric wires to be conductively connected is increased, thereby saving space.
In addition, since the separate connection terminal is crimped and connected to the terminal fitting, the connection terminal to which the wire of different diameter is connected is crimped and connected to the terminal connection portion to be conducted. Can. That is, it can respond to the electric wire of various sizes, without changing the connection form of the terminal connection part of a terminal, and the fastening connection part of a connection terminal. Further, by preparing terminal fittings having different numbers of terminal connection parts, it is possible to easily cope with increase and decrease in the number of electric wires to be conducted. As a result, it is possible to cope with the change in the number and the size of the wires to be conducted with the terminal fittings of the minimum necessary variation.
And since it is a structure which fastens a connection terminal to the several terminal connection part of a terminal metal fitting, it can crimp and connect a connection terminal to a terminal connection part as needed, and, thereby, the range of the number of terminal connection parts It is possible to easily increase or decrease the number of electric wires to be conducted collectively at one time.

(6) A pair of fastening and caulking pieces of the connection terminal connected to the end of the electric wire with respect to the terminal fitting having the terminal body and the plurality of terminal connection portions extended from the terminal body It is a temporary locking method of the terminal metal fitting and the connection terminal in the connection method of the terminal metal fitting that is caulked and connected to a pair of fastened tightening pieces formed on both sides of the connection portion,
By folding back the upper end portions of the pair of fastening and caulking pieces provided upright on both sides of the connection terminal, a holding space capable of accommodating the pair of fastening and caulking pieces is defined in the connecting terminal. The process to
The pair of fastening and caulking pieces is held by the temporary locking mechanism provided between the terminal connection portion and the connection terminal by storing the fastening and fastening pieces in the holding space. And a step of releasably locking the terminal fitting.

In the temporary locking method of the terminal metal fitting and the connection terminal of the configuration of the above (6), before the connection metal terminal is crimped and fastened to the terminal metal fitting, the fastening screw for the screw fastening piece and the connection terminal in the terminal connection portion of the terminal metal fitting The fastening piece can be put in a temporarily engaged state that can be disengaged by the temporary engagement mechanism.
Therefore, the harness in which the terminal metal fitting and the plurality of connection terminals are temporarily engaged can be moved between processes, and the connection terminal can be crimped and fastened to the terminal metal fitting in a later process. Work freedom is increased. In addition, since the terminal metal fitting in the temporary engagement state and the plurality of connection terminals can be freely engaged and disengaged, the continuity check of the harness is performed in the temporary engagement state, and circuit correction is also performed when the terminal metal fitting and the connection terminal are misconnected. It is easy.

(7) The temporary locking mechanism has an engagement protrusion which is provided so as to protrude from the tip end portion of the upper end portion of the to-be-fastened caulking piece so as to abut on the electric wire side surface of the fastening and caulking piece;
The upper end of the fastening caulking piece is hooked on the base end side of the upper end of the fastening caulking piece, and the connection terminal is used as a fulcrum with the upper end of the fastening caulking piece as a fulcrum The method for temporarily locking the terminal fitting and the connection terminal according to (6), wherein the clamped fastening piece is accommodated in the holding space by rotating around an axis along the axis.

In the temporary locking method of the terminal fitting and the connection terminal according to the above (7), the engagement projection can accommodate the fastened caulking piece in the holding space without elastically deforming the fastening caulking piece upward. Therefore, the protrusion height of the engagement protrusion can be increased, and the holding force (temporary locking force) of the terminal connection portion with respect to the connection terminal in the temporarily locked state can be increased.
In addition, the upper end of the fastening caulking piece is hooked on the base end side of the upper end of the fastening caulking piece, and the connection terminal is taken along the axis of the terminal connecting part along the insertion direction with the upper end of the fastening caulking piece as a fulcrum The tip of the pair of fastening and caulking pieces can be elastically deformed in the direction of widening while being rotated to accommodate the fastening and caulking piece in the holding space. Therefore, the fastening caulking piece can be accommodated in the holding space of the connection terminal with a light rotational operation load, and the fastening caulking piece can be brought into a temporary locking state.

(8) The tip of the end portion of the upper end of the to-be-fastened clamping piece is cut and raised so that the temporary locking mechanism abuts only the electric wire side surface of one of the to-be-fastened fastening pieces With an engaged projection piece,
The distal end portion of the terminal connection portion is inserted into the holding space such that the engagement projection piece passes between the pair of fastening and caulking pieces, and an axis along the insertion direction of the terminal connection portion The method for temporarily locking the terminal fitting and the connection terminal according to the above (6), characterized in that the to-be-fastened caulking piece is accommodated in the holding space by rotating around.

  In the temporary locking method of the terminal metal fitting and the connection terminal according to the above (8), the engagement projection piece which contacts only the side surface on the wire side of one fastening caulking piece passes between the pair of fastening caulking pieces Since the tip of the terminal connection is inserted into the holding space of the connection terminal, the tip of the terminal connection can be smoothly held with a low insertion force even if the height of the protrusion of the engaging protrusion is increased It can be inserted into space. Thereafter, the connection terminal is rotated about an axis along the insertion direction of the terminal connection portion, so that the engagement projection piece is opposed to the side surface on the electric wire side so as to intersect with one fastening and caulking piece. The connection terminal is securely in the temporary locking state with respect to the front end of the portion.

(9) A pair of fastening and caulking pieces of the connection terminal connected to the end of the wire with respect to the terminal fitting having the terminal body and the plurality of terminal connection portions extended from the terminal body It is a connection method of the terminal metal fitting which crimps and connects with a pair of to-be-fastened caulking pieces formed in the both sides of a connection part,
By folding back the upper end portions of the pair of fastening and caulking pieces erected on both sides of the connection terminal respectively, a holding space in which the pair of fastening and caulking pieces can be accommodated is defined in the connecting terminal Forming process,
The pair of fastening and caulking pieces are inserted into the pair of fastening and caulking pieces by the temporary locking mechanism provided between the terminal connection portion and the connection terminal by inserting the fastening and caulking pieces into the holding space. A temporary locking process for detachably locking to the
And a caulking step of crushing the fastening caulking pieces and caulking the pair of the fastening caulking pieces in the holding space.

In the connection method of the terminal fitting of the configuration of the above (9), the terminal connection portion is inserted into the holding space formed in advance in the connection terminal to make a temporary locking state, squeeze the fastening caulking piece and terminal connection in the holding space By caulking and fastening the pair of the caulked pieces formed in the portion, the caulking fastening operation can be performed in a state in which the posture of the terminal connection portion with respect to the connection terminal is stabilized.
Thereby, the defect which a variation produces in crimping | compression-bonding intensity | strength by position shift at the time of caulking, etc. can be suppressed. Furthermore, a plurality of connection terminals can be simultaneously caulked and fixed to the terminal fitting in the caulking process by temporarily fastening the caulking piece and the caulking piece to be fastened. As a result, the connection terminal can be crimped to and fastened to the terminal fitting, and a plurality of electric wires can be collectively connected to the terminal fitting.

  According to the present invention, a terminal fitting connection structure and connection method capable of collectively conducting a plurality of electric wires with high connection reliability and saving space while saving weight, and a provisional connection between the terminal fitting and the connection terminal A locking structure and a temporary locking method can be provided.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the modes for carrying out the invention described below (hereinafter referred to as "embodiments") with reference to the attached drawings. .

FIG. 1 is a view for explaining a connection structure of a terminal fitting according to a first embodiment of the present invention, and FIG. 1 (a) is a perspective view of the terminal fitting to which a grounding wire is connected; b) is a plan view of a terminal fitting to which a grounding wire is connected. FIG. 2 is a view for explaining the temporary locking structure of the terminal fitting and the connection terminal according to the first embodiment, and FIG. 2 (a) is a perspective view of the terminal fitting and the connection terminal; ) Is a plan view of the terminal fitting and the connection terminal. FIG. 3 is a perspective view of the terminal connection portion and the connection terminal. FIG. 4 is a schematic cross-sectional view of a crimping machine in which connection terminals and terminal connections are set. FIG. 5 is a cross-sectional view of an essential part for explaining the temporary locking method of the terminal fitting and the connection terminal and the connection method of the terminal fitting according to the first embodiment, and FIG. 5B is a sectional view taken along line B-B, FIG. 5B is a sectional view taken along line A-A in FIG. 5A, FIG. 5C is a sectional view taken along line D-D in FIG. (D) is a cross-sectional view taken along the line C-C in (c) of FIG. FIG. 6 is a cross-sectional view of an essential part for explaining the temporary locking method of the terminal fitting and the connection terminal and the connection method of the terminal fitting according to the first embodiment, and FIG. 6B is a cross-sectional view taken along the line E-E in FIG. 6A, FIG. 6C is a cross-sectional view taken along the line HH in FIG. (D) is a G-G sectional view in (c) of FIG. (A) of FIG. 7, (b) is a principal part expansion perspective view which shows the modification in the terminal-connection part of the terminal metal fitting which concerns on the 1st Embodiment of this invention. FIG. 8 is a view for explaining the temporary locking structure of the terminal fitting and the connection terminal according to the second embodiment of the present invention, and is a perspective view of the terminal fitting and the connection terminal. (A) of FIG. 9 is an enlarged perspective view of the terminal connection portion, and (b) of FIG. 9 is a main portion perspective view of the connection terminal temporarily locked to the terminal connection portion. FIG. 10 is a cross-sectional view of an essential part for explaining a method of temporarily locking the terminal fitting and the connection terminal according to the second embodiment, and FIG. 10A is connected with the terminal fitting according to the second embodiment. FIG. 10B is a cross-sectional view of a main part of a terminal fitting and a connection terminal according to a reference example. (A)-(c) of FIG. 11 is principal part sectional drawing explaining the temporary locking procedure of the terminal metal fitting and connection terminal which concern on the 2nd Embodiment of this invention. FIG. 12 is a view for explaining the temporary locking structure of the terminal fitting and the connection terminal according to the third embodiment of the present invention, and is a perspective view of the terminal fitting and the connection terminal. (A) of FIG. 13 is a perspective view of the terminal metal fitting and the connection terminal according to the third embodiment, and (b) of FIG. 13 is a main part perspective view of the connection terminal temporarily locked to the terminal connection portion. (A) to (f) of FIG. 14 are principal part cross-sectional views for explaining the temporary locking procedure of the terminal metal fitting and the connection terminal according to the third embodiment, and an I-I cross section in FIG. It corresponds to FIG. 15 is a view for explaining a temporary locking structure of the terminal fitting and the connection terminal according to the fourth embodiment of the present invention, wherein (a) of FIG. 15 is a connection terminal temporarily locked to the terminal connection portion. FIG. 15 (b) is a cross-sectional view taken along the line J-J in FIG. 15 (a). (A) and (b) of FIG. 16 are perspective views for explaining a method of temporarily locking the terminal fitting and the connection terminal according to the fourth embodiment of the present invention, and (c) of FIG. It is KK sectional drawing in (b).

Hereinafter, examples of embodiments according to the present invention will be described with reference to the drawings.
First, the connection structure of the terminal fitting and the temporary locking structure of the terminal fitting and the connection terminal according to the first embodiment of the present invention will be described.
FIG. 1 is a view for explaining a connection structure of a terminal fitting 10 according to a first embodiment of the present invention, and FIG. 1 (a) is a perspective view of the terminal fitting 10 to which a grounding wire D is connected; 1 (b) is a plan view of the terminal fitting 10 to which the grounding wire D is connected.

  As shown in (a) and (b) of FIG. 1, in the connection structure of the terminal fitting according to the first embodiment, the terminal connection portion 21 of the terminal fitting 10 and the connection terminal 30 are connected. The terminal fitting 10 is conductively connected to a ground surface such as a body of a vehicle. The connection terminal 30 connected to the terminal fitting 10 is provided at an end portion of a grounding wire (wire) D of an on-vehicle circuit (auxiliary device). The grounding wire D has a conductor portion 1 and a jacket 2 covering the conductor portion 1, and the conductor portion 1 is exposed from the jacket 2 at an end connected to the connection terminal 30. . The conductor portion 1 of the grounding wire D is conducted to the connection terminal 30. As a result, the grounding wire D of the on-vehicle circuit and the grounding surface such as the body of the vehicle are electrically connected via the terminal fitting 10. For example, a grounding wire D having a size of 8 sq is connected to the connection terminal 30.

  FIG. 2 is a view for explaining the temporary locking structure of the terminal fitting according to the first embodiment, and FIG. 2 (a) is a perspective view of the terminal fitting 10 and the connection terminal 30, FIG. 2 (b) Is a plan view of the terminal fitting 10 and the connection terminal 30.

  As shown in FIG. 2, the terminal fitting 10 has a terminal main body 11 and a plurality of terminal connection portions 21. The terminal fitting 10 is a press-formed product of a conductive metal plate. The terminal main body 11 has a fixed plate portion 12 circular in plan view. A circular mounting hole 13 is formed in the center of the fixing plate portion 12. The terminal main body 11 is fixed to a ground contact surface of a vehicle body or the like by a bolt (not shown) inserted through the mounting hole 13 of the fixed plate portion 12. The mounting hole 13 may be provided not in the center of the fixed plate 12 but in an eccentric manner.

  A connection plate portion 14 is formed on the fixing plate portion 12 at a half circumference portion of the periphery thereof. The connection plate portion 14 projects to the upper surface side which is one surface side. Thereby, a step is formed between the fixed plate 12 and the connection plate 14. In addition, a rotation prevention piece 15 is formed at a central position in the circumferential direction of the fixed plate portion 12 other than the connection plate portion 14. The rotation stop piece 15 is a bent portion engaged with a step or a hole around the ground surface for bolting the terminal body 11, and the rotation stop piece 15 engages with a step or the hole around the ground surface. The rotation of the terminal fitting 10 with respect to the ground plane is restricted.

  The terminal connection portion 21 is integrally formed with the connection plate portion 14 of the terminal main body 11. A plurality of terminal connection portions 21 are provided on the connection plate portion 14. Specifically, three terminal connection portions 21 are formed in the connection plate portion 14. These terminal connection portions 21 extend in the same plane as the lead-out direction of the grounding wires D connected to the connection terminals 30 respectively from the peripheral edge of the fixed plate portion 12 and are spaced apart in the width direction. It is arranged. In addition, the direction of the terminal connection part 21 of the center side is protruded toward the extension direction rather than the terminal connection part 21 of both sides.

As for each terminal connection part 21, the engagement wall 22 which is a to-be-fastened caulking piece which protrudes on the upper surface side which is one surface side is standingly arranged by the both sides. Thereby, each terminal connection part 21 is formed in a U-shape in a front view. The engaging walls 22 adjacent to each other of the terminal connection portion 21 are continuously formed on the peripheral wall portion 23 formed on the fixed plate portion 12 side.
Furthermore, an engagement protrusion 53 is provided to project upward at the tip end of the upper end portion of the engagement wall 22 in the terminal connection portion 21. As shown in FIG. 3, the engagement protrusion 53 has a wire side tapered surface 53a inclined toward the bottom toward the tip and a terminal metal fitting side tapered surface 53b inclined toward the bottom toward the base. It is a triangular protrusion. And the engagement protrusion part 53 comprises the temporary latching mechanism 51 with the electric wire side surface 55 of a pair of fastening caulking piece 32a formed in the fastening connection part 32 of the connection terminal 30 mentioned later.

  As shown in FIG. 3, the connection terminal 30 has a wire connection portion 31 and a fastening connection portion 32. A grounding wire D is connected to the wire connection portion 31. The connection terminal 30 provided on the grounding wire D is a press-formed product of a conductive metal plate. The fastening connection portion 32 is crimped and fastened to the terminal connection portion 21 of the terminal fitting 10. The wire connection portion 31 has a conductor crimped portion 33 and a covered crimped portion 34.

  The conductor caulking portion 33 is formed in a U shape having a pair of conductor caulking pieces 33a, and by caulking the conductor caulking pieces 33a, the conductor portion 1 of the grounding wire D is made of a conductor It is crimped to the fastening portion 33 and fixed. Thereby, the conductor portion 1 of the grounding wire D and the connection terminal 30 are conducted. Further, the conductor crimped portion 33 is provided with a rough surface portion (serration) 33 b roughened by processing on the inner surface thereof. The rough surface portion 33b is not limited to the illustrated shape. Thus, the conductor portion 1 of the grounding wire D crimped to the conductor crimped portion 33 is reliably conducted to the connection terminal 30.

  The covering caulking part 34 is formed in a U-shape having a pair of covering caulking pieces 34a, and the caulking of these covering caulking pieces 34a allows the tip portion of the sheath 2 of the grounding wire D to be formed. Is crimped and fixed to the covering crimped portion 34.

  In order to connect the grounding wire D to the connection terminal 30, the jacket 2 is removed at the end of the grounding wire D to expose the conductor portion 1. Then, the end of the grounding wire D is disposed on the wire connection portion 31 of the connection terminal 30, and the conductor crimping portion 33 is crimped, and the coating crimping portion 34 is crimped to connect the grounding wire D. The terminal 30 is conductively connected.

  The fastening connection portion 32 of the connection terminal 30 has a pair of fastening and caulking pieces 32a. The fastening and tightening pieces 32a are raised upward from the bottom 37, respectively. In addition, the upper end portions of these fastening and caulking pieces 32a are curved inward in an arc shape and are folded back.

  As a result, a holding space S surrounded by the fastening and caulking pieces 32 a is formed in the fastening connection portion 32 of the connection terminal 30. Both side surfaces of the holding space S are substantially vertical surfaces by the fastening and caulking pieces 32 a raised upward, and the both side surfaces are the rotation restricting surfaces 36.

  The holding space S of the fastening connection portion 32 is formed slightly larger than the outer shape of the engagement wall 22 in the terminal connection portion 21 in a front view and lower than the height of the engagement protrusion 53. Thus, the terminal connection portion 21 is insertable into and removable from the holding space S while elastically deforming the fastening and caulking piece 32a upward (see (c) and (d) in FIG. 5). Then, in a state where the terminal connection portion 21 is inserted into the holding space S, the insertion direction of the terminal connection portion 21 into the holding space S can be obtained by coming into contact with the rotation restricting surface 36 formed of both side surfaces forming the holding space S. The rotation of the terminal connection portion 21 about the axis along the axis is restricted.

Furthermore, the engagement protrusion 53 of the engagement wall 22 penetrating the holding space S of the fastening connection portion 32 constitutes a temporary locking mechanism 51 together with the electric wire side surface 55 of the fastening and caulking piece 32a. That is, in a state where the electric wire side surface 55 of the fastening caulking piece 32a is locked to the engagement projection 53 penetrating the holding space S, removal of the terminal connection portion 21 from the holding space S of the connection terminal 30 is restricted. Ru. The fastening and caulking piece 32a has a fixed holding force with respect to the engaging projection 53 of the engaging wall 22, but the engaging projection 53 elastically deforms the fastening and caulking piece 32a upward. When a predetermined or more pulling force moving to the terminal fitting side acts on the connection terminal 30, the connection terminal 30 is pulled out of the terminal connection portion 21.
Thus, the terminal fitting 10 and the connection terminal 30 are temporarily engaged with each other such that the engagement wall 22 and the fastening caulking piece 32 a in the terminal connection portion 21 can be engaged and disengaged by the temporary engagement mechanism 51. It has a stop structure.

As described above, according to the temporary locking structure of the terminal fitting 10 and the connection terminal 30 according to the first embodiment, the terminals of the terminal fitting 10 are crimped and fastened to the terminal fitting 10 by caulking. As shown in FIG. 2, the engagement wall 22 in the connection portion 21 and the fastening caulking piece 32 a of the connection terminal 30 are brought into a temporarily engaged state that can be engaged and disengaged by the temporary engagement mechanism 51.
Therefore, the harness in which the terminal fitting 10 and the plurality of connection terminals 30 are temporarily engaged can be moved between processes, and the connection terminal 30 can be crimped to the terminal fitting 10 in a later process. Work freedom of harness assembly work increases. In addition, since the terminal metal fitting 10 in the provisionally locked state and the plurality of connection terminals 30 can be freely engaged and disengaged, the terminal metal fitting 10 and the connection terminal 30 are erroneously connected by performing the continuity check of the harness in the provisionally locked state. It is easy to correct the circuit of

Further, according to the connection structure of the terminal fitting 10 according to the first embodiment, when the terminal fitting 10 is connected to the plurality of electric wires D via the connection terminal 30, the electrical connection reliability is achieved by caulking. Is maintained.
Furthermore, when the fastening caulking piece 32a is caulked to the engaging wall 22, the engaging wall 22 and the fastening caulking piece 32a are temporarily engaged, so that positional deviation or the like during caulking occurs. It is possible to suppress defects that cause variations in crimp strength. Further, by temporarily engaging the engagement wall 22 and the fastening caulking piece 32a, the plurality of connection terminals 30 can be caulked and fixed to the terminal fitting 10 at the same time.

  As a result, the connection terminal 30 can be crimped to and fastened to the terminal fitting 10, and the plurality of electric wires D can be collectively and electrically connected to the terminal fitting 10. As compared with the conventional structure in which the terminal fittings connected to the respective electric wires D are overlapped and fastened and conducted, there is no need to overlap the terminal fittings 10, so even if the number of the electric wires D increases, It is possible to suppress the increase in weight. Further, since it is not necessary to stack the terminal fittings 10, the thickness of the terminal fittings 10 does not increase even if the number of the wires D to be conductively connected increases, and space saving can be achieved. Furthermore, it is not necessary to perform the tightening operation after the nut length and the bolt length associated with the lamination of the terminal fitting 10 are matched, and the operation time can be shortened.

Further, since the separate connection terminal 30 is crimped and connected to the terminal fitting 10, the connection terminal 30 to which the wires D having different diameters are connected is crimped to the terminal connection portion 21. Can be conducted. That is, without changing the connection form of the terminal connection portion 21 of the terminal fitting 10 and the fastening connection portion 32 of the connection terminal 30, the electric wire D of various sizes can be accommodated. Further, by preparing the terminal fittings 10 having different numbers of terminal connection portions 21, it is possible to easily cope with the increase and decrease of the number of the electric wires D to be conducted. As a result, it is possible to cope with the change in the number and the size of the wires D to be conducted by the terminal fitting 10 of the minimum necessary variation.
Moreover, since the connection terminals 30 are fastened to the plurality of terminal connection portions 21 of the terminal fitting 10, the connection terminals 30 can be crimped and fastened to the terminal connection portions 21 as necessary, whereby the terminal connection is achieved. Within the range of the number of the parts 21, the number of the electric wires D to be conducted at once can be easily increased or decreased.

  Moreover, the terminal connection portions 21 extend in the drawing direction of the grounding wires D respectively connected to the connection terminals 30 at intervals from each other in the same plane. Therefore, the connection direction of the connection terminal 30 to the terminal fitting 10 and the wiring direction of the grounding wire D can be aligned in the same direction, and the fastening workability of the connection terminal 30 to the terminal connection portion 21 of the terminal fitting 10 can be improved. Can. Further, the wiring directions of the ground wires D can be aligned in the same direction to follow the flow of the main line, and further minimize unnecessary expansion of the ground wires D and bending of the ground wire D in the vicinity of the connection terminal 30. be able to.

Next, a method of temporarily locking the terminal fitting and the connection terminal according to the first embodiment and a method of connecting the terminal fitting will be described. (Retention space definition process)
First, as shown in (a) and (b) of FIG. 3 and FIG. 5, the upper ends of a pair of fastening and caulking pieces 32 a erected on both sides of the connection terminal 30 are respectively folded back inwards. A holding space S capable of accommodating the engagement wall 22 is defined in the connection terminal 30.

(Temporary locking process)
Next, by inserting the engagement wall 22 of the terminal connection portion 21 into the holding space S, the temporary fastening mechanism 51 provided between the terminal connection portion 21 and the connection terminal 30 fixes the pair of fastening and tightening pieces 32a. It is detachably engaged with the pair of engagement walls 22. Specifically, as shown in (c) and (d) of FIG. 5 and (a) and (b) of FIG. 6, the terminal connection portion 21 is inserted into the holding space S of the connection terminal 30 and engaged The engagement projection 53 of the wall 22 is penetrated into the holding space S.

  At this time, since the holding space S is formed to be lower than the height of the engaging protrusion 53, when the terminal connection portion 21 is to be inserted into the holding space S, the engaging protrusion 53 is a terminal fitting of the fastening caulking piece 32a. Abuts the side surface 54. Since the electric wire side taper surface 53a is formed in the engagement protrusion 53, when the terminal connection portion 21 is strongly pushed into the holding space S, as shown in (c) and (d) of FIG. The engagement projection 53 enters the holding space S while elastically deforming the fastening and caulking piece 32a upward, and reaches the electric wire side surface 55 of the fastening and caulking piece 32a.

  When the engagement protrusion 53 reaches the wire side surface 55, as shown in (a) and (b) of FIG. 6, the fastening and caulking piece 32a elastically returns downward. Therefore, the electric wire side surface 55 of the fastening caulking piece 32a abuts on the engaging projection 53 which penetrates the holding space S to be engaged, and the withdrawal of the terminal connection portion 21 from the holding space S of the connection terminal 30 is restricted. Be done. In addition, when the terminal connection portion 21 is inserted into the holding space S, the terminal connection portion 21 contacts the rotation restricting surface 36 formed by the both sides of the holding space S, so that the axis along the insertion direction It is hold | maintained at the fastening connection part 32 of the connection terminal 30 in the state by which rotation was controlled. Thus, the terminal connection portion 21 is maintained in a predetermined posture and position with respect to the connection terminal 30.

Under the present circumstances, although the fastening caulking piece 32a has fixed holding | maintenance force with respect to the engagement protrusion part 53 of the engagement wall 22 which it is going to pull out, the terminal metal fitting side taper surface of the engagement protrusion part 53 is carried out. The connecting terminal 30 is pulled out of the terminal connecting portion 21 when a pulling force of a predetermined value or more, which moves toward the terminal fitting side while elastically deforming the fastening caulking piece 32 a upward, acts on the connecting terminal 30.
Thus, in the terminal fitting 10 and the connection terminal 30, the engagement wall 22 and the fastening caulking piece 32a in the terminal connection portion 21 are brought into a temporary locking state in which the temporary locking mechanism 51 can engage and disengage.

(Installation process)
As shown in FIG. 4, the crimping machine 41 that crimps and crimps the connection terminal 30 to the terminal connection portion 21 includes an anvil 42 and a crimper 43 that can be moved close to and away from the anvil 42. The upper surface of the anvil 42 is a mounting surface 42a, and the connection terminal 30 is mounted on the mounting surface 42a. The mounting surface 42 a is shaped so as to be slightly arched downward. Thereby, the connection terminal 30 mounted on the mounting surface 42 a is disposed on the anvil 42. The crimper 43 is formed in a concave shape having a guiding surface 43a which gently spreads toward the anvil 42, and a pressing surface which presses the respective fastening and caulking pieces 32a inward at the upper part of the concave portion It has 43b.

  Therefore, as shown in FIG. 4, the connection terminal 30 temporarily locked to the terminal connection portion 21 is placed on the placement surface 42 a of the anvil 42 of the crimping machine 41. Even in this state, since the terminal connection portion 21 is inserted into the holding space S and temporarily locked by the temporary locking mechanism 51, rotation and removal movement around the axis along the insertion direction is possible. It is regulated and maintained in a predetermined posture and position with respect to the connection terminal 30.

(Caching process)
The crimping machine 41 is operated to start crimping, and the crimper 43 of the crimping machine 41 is lowered. Then, the fastening connection portion 32 is guided to the concave portion by the guiding surface 43 a of the crimper 43. Also at this time, the terminal connection portion 21 is maintained in a predetermined posture and position with respect to the connection terminal 30 in the holding space S. Thereafter, the pressing surface 43b of the crimper 43 abuts on the upper portion of the fastening caulking piece 32a of the fastening connection portion 32, whereby the fastening caulking piece 32a is crushed and caulking is started.

Then, the fastening and caulking pieces 32a wind around both sides of the terminal connection portion 21, and thereafter, the fastening and caulking pieces 32a are caulked so as to wind the engagement wall 22 of the terminal connection portion 21 from the outside.
Thereby, as shown in (c) and (d) of FIG. 6, the engaging wall 22 is rounded inside the fastening caulking piece 32a and accommodated without a gap, and the terminal connecting part 21 is filled in the fastening connecting part 32. It will be in the Therefore, while the fastening connection part 32 is firmly crimped and fastened with high contact pressure with respect to the terminal connection part 21, while the terminal metal fitting 10 and the connection terminal 30 are conduct | electrically_connected reliably.

  Furthermore, since the engagement projection 53 of the terminal connection portion 21 is not crimped and is provided at the tip of the upper end of the engagement wall 22, the terminal connection portion 21 is prevented from coming off the fastening caulking piece 32a. Be done. That is, when the fastening connection portion 32 is caulked and fastened to the terminal connection portion 21, the fastening caulking piece 32 a can not be elastically deformed upward with respect to the bottom portion 37 of the connection terminal 30. Therefore, the terminal connection portion 21 in which the engagement protrusion 53 can not be pulled out from the fastening and caulking piece 32 a is firmly prevented from being pulled out from the fastening connection portion 32.

  When the terminal connection portions 21 of the terminal fittings 10 and the connection terminals 30 are fastened and connected in the above process, the plurality of grounding wires D are collectively conducted to the terminal fittings 10. Then, the plurality of grounding wires D are grounded by fixing the terminal fitting 10 to the ground surface of the vehicle with a bolt.

  As described above, according to the temporary locking method of the terminal fitting and the connection terminal according to the first embodiment, the terminal connection portion of the terminal fitting 10 before the connection terminal 30 is crimped and fastened to the terminal fitting 10. The engagement wall 22 and the fastening caulking piece 32 a of the connection terminal 30 at 21 can be put in a temporary engagement state that can be engaged and disengaged by the temporary engagement mechanism 51.

  Therefore, the harness in which the terminal fitting 10 and the plurality of connection terminals 30 are temporarily engaged can be moved between processes, and the connection terminal 30 can be crimped to the terminal fitting 10 in a later process. Work freedom of harness assembly work increases. In addition, since the terminal metal fitting 10 in the provisionally locked state and the plurality of connection terminals 30 can be freely engaged and disengaged, the terminal metal fitting 10 and the connection terminal 30 are erroneously connected by performing the continuity check of the harness in the provisionally locked state. It is easy to correct the circuit of

  Further, according to the method of connecting the terminal fitting according to the first embodiment, the terminal connection portion 21 is inserted into the holding space S formed in advance in the connection terminal 30 to make it into a temporarily locked state, and the fastening caulking piece 32a is pushed. The caulking fastening work is performed in a state where the posture of the terminal connection portion 21 with respect to the connection terminal 30 is stabilized by caulking and fastening the pair of engaging walls 22 formed in the terminal connection portion 21 in the holding space S by crushing. It can be carried out.

  Thereby, the defect which a variation produces in crimping | compression-bonding intensity | strength by position shift at the time of caulking, etc. can be suppressed. Furthermore, by temporarily engaging the engagement wall 22 and the fastening and caulking piece 32a, the plurality of connection terminals 30 can be simultaneously caulked and fixed to the terminal fitting 10 in the caulking process. As a result, the connection terminal 30 can be crimped to and fastened to the terminal fitting 10, and the plurality of electric wires D can be collectively conductively connected to the terminal fitting.

Further, the engagement projection 53 provided on the engagement wall 22 as a temporary engagement mechanism 51 for temporarily engaging the terminal fitting 10 and the plurality of connection terminals 30 can be easily formed on the engagement wall 22 by pressing or the like. It can form and can suppress the rise of processing cost.
In the first embodiment, as the temporary locking mechanism 51, the engaging projection 53 that contacts the electric wire side surface 55 of the fastening and caulking piece 32a is protruded to the tip of the upper end of the engaging wall 22 in the terminal connection portion 21. Although provided, the temporary locking mechanism is not limited to the above configuration.

For example, as shown in FIG. 7A, a notch 54 can be formed at the tip of the engaging wall 22 of the terminal connection portion 21A of the terminal fitting 10A to form a flexible deformable locking arm, which is engaged. The temporary locking mechanism may be configured such that the engagement projection 53 protruding from the top end of the wall 22 can be displaced in the locking release direction (downward in the drawing). By providing the engagement protrusion 53 on the swinging end side of the locking arm in this manner, the insertion force at the time of inserting the engagement wall 22 into the holding space S of the fastening connection portion 32 can be reduced.
Further, in the engagement protrusion 53, the inclination angles of the wire-side tapered surface 53a and the terminal fitting-side tapered surface 53b can be changed as appropriate, and the insertion force and the extraction force can be set freely. Of course, the shape of the engaging protrusion according to the present invention is not limited to a triangular shape, and various shapes such as a semicircular shape and a trapezoidal shape can be adopted.

  Further, as shown in FIG. 7B, the distal end narrowing insertion guide 60 inserted and guided when the terminal connection portion 21B of the terminal fitting 10B is inserted into the holding space S of the fastening connection portion 32 is a terminal You may provide in the front-end | tip part of the bottom part in the connection part 21B. By thus forming the insertion guide 60 at the distal end portion of the terminal connection portion 21B, the insertability at the time of inserting the engagement wall 22 into the holding space S can be improved. The insertion guide 60 is not limited to the illustrated triangular shape, but can take various shapes such as a semicircular shape and a semielliptical shape.

  Moreover, although the case where the terminal metal fitting 10 which has three terminal connection parts 21 was used was demonstrated to the example in the said 1st Embodiment, the terminal connection part 21 of the terminal metal fitting 10 is not limited to three if it is plural. There may be four or more.

  Furthermore, in the first embodiment, by connecting the grounding wires D of the on-vehicle circuit (auxiliary equipment) to the terminal fitting 10, these grounding wires D are collectively grounded. The wires to be connected are not limited to grounding.

  Also, without providing the detent piece 15 on the terminal main body 11 of the terminal fitting 10, when attaching the terminal fitting 10 to the ground surface, a step or detent piece serving as a detent in contact with the terminal fitting 10 is provided on the ground surface side. It is good.

  Further, in the first embodiment, the plurality of terminal connection portions 21 extend in the same plane, in the drawing direction of the grounding wire D connected to the connection terminal 30 from the peripheral edge of the fixed plate portion 12 respectively. However, the terminal connection part according to the present invention may be radially extended from the periphery of the fixing plate part in the same plane.

Next, a temporary locking structure of the terminal fitting and the connection terminal according to the second embodiment of the present invention will be described. In addition, about the structural member similar to the terminal metal fitting 10 and the connection terminal 30 which concern on the said 1st Embodiment, a same sign is attached | subjected and detailed description is abbreviate | omitted.
FIG. 8 is a perspective view for explaining a temporary locking structure of the terminal fitting 10C and the connection terminal 70 according to the second embodiment of the present invention, and FIG. 9 (a) is an enlarged perspective view of the terminal connection portion 21C. FIG. 9B is a perspective view of an essential part of the connection terminal 70 temporarily locked to the terminal connection portion 21. As shown in FIG.

  As shown in FIGS. 8 and 9, the terminal fitting 10C according to the second embodiment includes the terminal main body 11 and a plurality of terminal connection portions 21C. The terminal fitting 10C is a press-formed product of a conductive metal plate.

  The terminal connection portion 21C is integrally formed with the connection plate portion 14 of the terminal main body 11. A plurality of terminal connection portions 21C are provided on the connection plate portion 14. Specifically, three terminal connection portions 21 C are formed in the connection plate portion 14. These terminal connection portions 21C extend in the same plane as the lead-out direction of the grounding wires D connected to the connection terminals 70 from the peripheral edge of the fixed plate portion 12, respectively, and are spaced apart in the width direction. It is arranged. The terminal connection portion 21C on the center side of the terminal connection portions 21C on both sides is protruded in the extending direction.

In each of the terminal connection portions 21C, an engagement wall 22 which is a to-be-fastened caulking piece protruding to the upper surface side which is one surface side is provided upright on both side portions. Thereby, each terminal connection portion 21C is formed in a U-shape in a front view.
Furthermore, an engagement protrusion 63 is provided to project upward at the tip of the upper end of the engagement wall 22 in the terminal connection portion 21C. As shown in FIG. 9A, the engagement protrusion 63 has a wire-side tapered surface 63a that inclines toward the bottom toward the tip end, and a terminal metal fitting-side locking surface that rises substantially perpendicularly to the base end. And 63b. In addition, in the tip end portion on the bottom portion side of the engagement wall 22, a relief portion 63c is notched to avoid interference when the tip end portion of the terminal connection portion 21C is inserted in an oblique direction with respect to the holding space S. (See FIG. 10 (a)).

And the engagement protrusion part 63 and the relief part 63c comprise the temporary latching mechanism 61 with the electric wire side surface 75 of a pair of fastening caulking piece 72a formed in the fastening connection part 72 of the connection terminal 70 mentioned later. .
As shown in FIG. 8, the connection terminal 70 has a wire connection portion 31 and a fastening connection portion 72. The connection terminal 70 provided on the grounding wire D is a press-formed product of a conductive metal plate. The fastening connection portion 72 is crimped to the terminal connection portion 21C of the terminal fitting 10C.

  The fastening connection portion 72 of the connection terminal 70 has a pair of fastening and caulking pieces 72a. The fastening and fastening pieces 72a are raised upward from the bottom 37, respectively. In addition, the upper end portions of these fastening and caulking pieces 72 a are curved inward in an arc shape and are folded back.

  Thus, a holding space S surrounded by the fastening and caulking pieces 72 a is formed in the fastening connection portion 72 of the connection terminal 70. Both side surfaces of the holding space S are substantially vertical surfaces by the fastening and caulking pieces 72 a raised upward, and the both side surfaces are the rotation restricting surfaces 36.

  The holding space S of the fastening connection portion 72 is formed slightly larger than the outer shape of the engagement wall 22 in the terminal connection portion 21C in a front view, and lower than the height of the engagement protrusion 63. Further, as shown in FIG. 10A, the end of the engagement wall 22 on the bottom side is interfered with when the end of the terminal connection portion 21C is inserted in an oblique direction with respect to the holding space S. In order to avoid this, the relief portion 63c is cut out.

Thus, the distal end portion of the terminal connection portion 21C can be inserted into and removed from the holding space S while rotating (swinging) along the insertion direction from the oblique direction with respect to the holding space S.
That is, as in the case of the terminal connection portion 21G of the terminal fitting according to the reference example shown in (b) of FIG. 10, when the relief portion 63c is not cut out in the end portion 65 on the bottom side of the engagement wall 22 When the tip end of the terminal connection portion 21C is inserted from the oblique direction to the holding space S, it interferes and is difficult to insert. Also, if it is attempted to force the insertion, a high insertion force is required.

  As shown in (a) to (b) of FIG. 11, the terminal connection portion 21C in which the tip end portion is inserted in an oblique direction with respect to the holding space S is an upper end portion of the engagement wall 22, an engagement protrusion 63, The bottom end tip 63d is in sliding contact with the inner wall of the fastening connection portion 72, and is inserted into the holding space S while being rotated along the insertion direction.

  Then, as shown in (c) of FIG. 11, when the engagement projection 63 of the engagement wall 22 penetrates the holding space S, the electric wire of the fastening caulking piece 72 a is engaged with the engagement projection 63 passing through the holding space S When the side surface 75 abuts, the side surface 75 is locked, and the removal of the terminal connection portion 21C from the holding space S of the connection terminal 70 is restricted. In addition, when the terminal connection portion 21C is inserted into the holding space S, the terminal connection portion 21C abuts on the rotation restricting surface 36 formed by the both sides of the holding space S, so that the axis along the insertion direction The rotation is restricted, and is held by the fastening connection portion 72 of the connection terminal 70. As a result, the terminal connection portion 21C is maintained at a predetermined posture and position with respect to the connection terminal 70.

  Furthermore, the engagement protrusion 63 of the engagement wall 22 penetrating the holding space S of the fastening connection portion 72 constitutes a temporary locking mechanism 61 together with the electric wire side surface 75 of the fastening and caulking piece 72a. That is, in a state in which the electric wire side surface 75 of the fastening caulking piece 72a is engaged with the terminal metal fitting side engaging surface 63b of the engaging projection 63 penetrating the holding space S, the terminal from the holding space S of the connection terminal 70 Removal of the connecting portion 21C in the axial direction is restricted.

The fastening and caulking piece 72a locked to the terminal fitting side locking surface 63b of the engagement protrusion 63 is held constant in the axial direction of the terminal connection portion 21C with respect to the engagement protrusion 63 of the engagement wall 22. Although it has a force, while the base end portion of the terminal connection portion 21C rotates in the direction opposite to the insertion direction in the oblique direction with respect to the holding space S, a predetermined or more drawing force that moves to the terminal fitting side When acting on the connection terminal 70, the connection terminal 70 is removed from the terminal connection portion 21C.
Thus, the terminal fitting 10C and the connection terminal 70 are temporarily engaged with each other such that the engagement wall 22 and the fastening caulking piece 72a in the terminal connection portion 21C can be engaged and disengaged by the temporary engagement mechanism 61. It has a stop structure.

As described above, according to the temporary locking structure of the terminal fitting 10C and the connection terminal 70 according to the second embodiment, the terminals of the terminal fitting 10C are crimped and fastened to the terminal fitting 10C. The engagement wall 22 in the connection portion 21C and the fastening caulking piece 72a of the connection terminal 70 are brought into a temporarily engaged state that can be engaged and disengaged by the temporary engagement mechanism 61 as shown in FIG. .
Therefore, similar to the temporary locking structure of the terminal metal fitting 10 and the connection terminal 30 according to the first embodiment, the harness in which the terminal metal fitting 10C and the plurality of connection terminals 70 are temporarily locked is moved between processes. Since the connection terminal 70 can be crimped and fastened to the terminal fitting 10C in a later step, the freedom of the harness assembling operation is increased. In addition, since the terminal metal fitting 10C in the temporarily locked state and the plurality of connection terminals 70 can be freely engaged and disengaged, when the conduction check of the harness is performed in the temporarily locked state, the terminal metal fitting 10C and the connection terminal 70 are misconnected It is easy to correct the circuit of

Therefore, according to the temporary locking structure of the terminal fitting 10C according to the second embodiment having the temporary locking mechanism 61 and the connection terminal 70, the engaging projection 63 is provided in a projecting manner and the bottom side of the engaging wall 22. The tip end portion of the terminal connection portion 21C in which the relief portion 63c is formed is inserted into the holding space S of the connection terminal 70 while being rotated from the oblique direction along the insertion direction.
Therefore, compared with the case where the end of the terminal connection portion 21C is straightly inserted into the holding space S of the connection terminal 70 from the axial direction, the protrusion height of the engagement protrusion 63 can be made higher, The holding force (temporary locking force) of the terminal connection portion 21C with respect to the connection terminal 70 in the stopped state can be increased. Further, the insertion force when the tip of the terminal connection portion 21C is inserted into the holding space S of the connection terminal 70 can be reduced, and smooth insertion becomes possible.

Next, a temporary locking structure of the terminal fitting and the connection terminal according to the third embodiment of the present invention will be described. In addition, about the structural member similar to the terminal metal fitting 10 and the connection terminal 30 which concern on the said 1st Embodiment, a same sign is attached | subjected and detailed description is abbreviate | omitted.
FIG. 12 is a perspective view for explaining the temporary locking structure of the terminal fitting 10D and the connection terminal 80 according to the third embodiment of the present invention, and FIG. 13 (a) is a perspective view of the terminal fitting 10D and the connection terminal 80. FIG. 13B is a perspective view of an essential part of the connection terminal 80 temporarily locked to the terminal connection portion 21D.

  As shown in FIGS. 12 and 13, the terminal fitting 10D according to the third embodiment includes a terminal main body 11D and a plurality of terminal connection portions 21D. The terminal fitting 10D is a press-formed product of a conductive metal plate.

  The terminal connection portion 21D is integrally formed with the connection plate portion 14 of the terminal main body 11D. A plurality of terminal connection portions 21D are provided on the connection plate portion 14. Specifically, three terminal connection portions 21D are formed in the connection plate portion 14. The terminal connection portions 21D are radially extended and spaced apart from the periphery of the fixing plate portion 12 in the width direction.

In each of the terminal connection portions 21D, an engagement wall 22 which is a to-be-fastened caulking piece protruding to the upper surface side which is one surface side is erected on both side portions. Thereby, each terminal connection portion 21D is formed in a U-shape in a front view.
Furthermore, a pair of engagement projections 91 and 93 are provided to project upward at the tip of the upper end of the engagement wall 22 in the terminal connection portion 21D. As shown in (a) of FIG. 13, these engaging protrusions 91 and 93 are fastening and caulking pieces so as to face both side surfaces 85 a and 85 b along the connection direction of the connection terminals in the fastening and caulking pieces 82 a. It is provided with a gap S1 slightly wider than the connection direction width W1 of 82a.

The engagement projections 91 and 93 are temporarily engaged with the electric wire side surface 85a and the terminal metal fitting side surface 85b of the pair of fastening and caulking pieces 82a formed on the fastening connection portion 82 of the connection terminal 80 described later. The mechanism 81 is configured.
As shown in FIG. 12, the connection terminal 80 has a wire connection portion 31 and a fastening connection portion 82. The connection terminal 80 provided on the grounding wire D is a press-formed product of a conductive metal plate. The fastening connection portion 82 is crimped to the terminal connection portion 21D of the terminal fitting 10D.

  The fastening connection portion 82 of the connection terminal 80 has a pair of fastening and caulking pieces 82a. The fastening and fastening pieces 82a are raised upward from the bottom 37, respectively. In addition, the upper end portions of these fastening and caulking pieces 82a are curved inward in an arc shape and folded back.

  Thus, a holding space S surrounded by the fastening and caulking pieces 82 a is formed in the fastening connection portion 82 of the connection terminal 80. Both side surfaces of the holding space S are substantially vertical surfaces by the fastening and caulking pieces 82 a raised upward, and the both side surfaces are the rotation restricting surfaces 36.

The holding space S of the fastening connection portion 82 is slightly larger than the outer shape of the engagement wall 22 in the terminal connection portion 21D in a front view, and is formed lower than the height of the engagement protrusion portions 91 and 93.
And as shown to (b) of FIG. 13, the fastening caulking piece 82a of the connection terminal 80 accommodated in holding space S of this fastening connection part 82 is a pair provided protrudingly provided at the front-end | tip part of terminal connection part 21D. In the state of being positioned in the connection direction by the engagement protrusions 91 and 93, the temporary locking state is obtained.
Therefore, in the temporary locking structure of the terminal 10D according to the third embodiment and the connection terminal 80, in addition to the same function and effect as the temporary locking structure of the terminal 10 and the connection terminal 30 according to the first embodiment. The positioning accuracy when caulking and fastening the fastening caulking piece 82a of the connection terminal 80 to the engagement wall 22 of the terminal fitting 10D is improved, and the connection terminal 80 is caulked with high accuracy to the terminal connection portion 21D of the terminal fitting 10D. It can be fixed. In addition, the engagement protrusion part 93 which opposes the terminal metal fitting side surface 85b can be abbreviate | omitted, and it can also be set as the structure which makes the connection terminal 80 a temporary latching state only by the engagement protrusion part 91. FIG.

Next, a method of temporarily locking the terminal fitting 10D and the connection terminal 80 according to the third embodiment of the present invention will be described.
First, as shown in (a) of FIG. 14, in the connection terminal 80, the pair of fastening and caulking pieces 82 a in the fastening connection portion 82 is one engagement wall 22 in the terminal connection portion 21 D (in FIG. After being rotated 180 degrees so as to face the joint wall 22), the upper end portion of the engagement wall 22 between the pair of engagement projections 91 and 93 (the base end side of the engagement projection 91) is a pair It is inserted between the fastening and tightening pieces 82a.

Then, as shown in (b) and (c) of FIG. 14, the connection terminal 80 is rotated clockwise in the figure about the axis along the insertion direction of the terminal connection portion 21D, and one fastening caulking piece The upper end of 82a is hooked on the upper end of one engagement wall 22 (between the pair of engagement projections 91, 93).
Further, as shown in (d) and (e) of FIG. 14, the connection terminal 80 is rotated about an axis along the insertion direction of the terminal connection portion 21D with the upper end portion of one engaging wall 22 as a fulcrum. At this time, the upper end portion of the other fastening caulking piece 82a moves in sliding contact with the outer peripheral surface of the terminal connection portion 21D, and the tips of the pair of fastening caulking pieces 82a elastically deform in the direction of width.

  And as shown to (f) of FIG. 14, it is connected until the upper end part of the other fastening caulking piece 82a is hooked on the upper end part of the other engaging wall 22 (the engaging wall 22 of the left in the figure). When the terminal 80 is rotated, the fastening and caulking piece 82 a of the connection terminal 80 is accommodated in the holding space S of the fastening connection portion 82.

As a result, as shown in (b) of FIG. 13, the fastening caulking piece 82 a of the connection terminal 80 accommodated in the holding space S of the fastening connection portion 82 is provided so as to protrude from the tip of the terminal connection portion 21D. The pair of engagement protrusions 91 and 93 brings about a temporarily locked state positioned in the connection direction.
That is, the electric wire side surface 85a of the fastening and caulking piece 82a abuts on the engaging projection 91 and is locked, and movement of the connecting terminal 80 in the connecting direction from the holding space S is restricted. Further, when the terminal connection portion 21D inserted into the holding space S abuts on the rotation restricting surface 36 formed by the both sides of the holding space S, the rotation around the axis along the insertion direction is restricted. In this state, it is held by the fastening connection portion 82 of the connection terminal 80. Thus, the terminal connection portion 21D is maintained at a predetermined posture and position with respect to the connection terminal 80.

  As described above, the pair of engagement protrusions 91, 93, together with the electric wire side surface 85a of the fastening and caulking piece 82a, constitute a temporary locking mechanism 81. That is, in a state in which the electric wire side surface 85a of the fastening caulking piece 82a is engaged with the engagement protrusion 91, the movement of the connection terminal 80 from the holding space S along the axial direction of the terminal connection portion 21D is restricted. .

The fastening and caulking piece 82a locked to the engagement protrusion 91 has a fixed holding force with respect to the engagement protrusion 91 of the engagement wall 22 in the axial direction of the terminal connection portion 21C. Remove the upper end portion of one fastening caulking piece 82a hooked on the upper end portion of the engagement wall 22 and rotate the connection terminal 80 about an axis along the insertion direction of the terminal connection portion 21D (FIG. 14 (a) ~ The connection terminal 80 is removed from the terminal connection portion 21D by the reverse procedure to the procedure shown in (f).
Thus, the terminal fitting 10D and the connection terminal 80 are temporarily engaged with each other such that the engagement wall 22 and the fastening caulking piece 82a in the terminal connection portion 21D can be engaged and disengaged by the temporary engagement mechanism 81. It has a stop structure.

  As described above, according to the temporary locking method of the terminal 10D according to the third embodiment of the present invention and the connection terminal 80, the engaging projection 91 does not elastically deform the fastening caulking piece 82a upward. Since the engaging wall 22 can be accommodated in the holding space S, the protruding height of the engaging protrusion 91 can be increased, and the holding force of the terminal connection portion 21D with respect to the connection terminal 80 in the temporarily locked state ( The temporary locking force can be increased.

  Further, the upper end portion of the fastening caulking piece 82a is hooked on the base end side of the engaging projection portion 91 at the upper end portion of the engaging wall 22, and the connection terminal 80 is connected with the upper end portion of the fastening caulking piece 82a as a fulcrum The engagement wall 22 can be accommodated in the holding space S by elastically deforming the ends of the pair of fastening and caulking pieces 82a in the direction of widening while rotating around an axis along the insertion direction of the portion 21D. Therefore, the engagement wall 22 can be accommodated in the holding space S of the connection terminal 80 with a light rotational operation load having the electric wire side of the connection terminal 80, and the fastening and caulking piece 82a can be brought into a temporarily locked state. That is, in the temporary locking mechanism 81, the rotational operation load at the time of housing the engaging wall 22 in the holding space S is reduced, and the movement of the connection terminal 80 from the holding space S along the axial direction of the terminal connection portion 21D is Since the control is strongly restricted, a structure that is easy to fit and hard to remove can be obtained.

Next, a temporary locking structure of the terminal fitting and the connection terminal according to the fourth embodiment of the present invention will be described. In addition, about the structural member similar to the terminal metal fitting 10 and the connection terminal 30 which concern on the said 1st Embodiment, a same sign is attached | subjected and detailed description is abbreviate | omitted.
FIGS. 15 (a) and 15 (b) are views for explaining the temporary locking structure of the terminal fitting 10E and the connection terminal 100 according to the fourth embodiment of the present invention, and FIGS. FIG. 7 is a view for explaining a method of temporarily locking a terminal fitting and a connection terminal according to a fourth embodiment of the present invention.

  As shown in FIG. 15, the terminal fitting 10E according to the fourth embodiment has a plurality of terminal connection portions 21E. However, in FIG. 15A, only one terminal connection portion 21E is illustrated. The terminal fitting 10E is a press-formed product of a conductive metal plate.

In the terminal connection portion 21E, an engagement wall 22 which is a fastening caulking piece projecting to the upper surface side which is one surface side is erected on both side portions. Thereby, each terminal connection part 21E is formed in a U-shape in a front view.
Furthermore, one engaging wall 22 in the terminal connection portion 21E has an engaging protruding piece 120 whose tip is cut and raised to the side of the tip end in the upper end portion. That is, as shown in FIG. 15, the engagement projecting piece 120 abuts only on the electric wire side surface 105 of the one fastening caulking piece 102a (the fastening caulking piece 102a on the left in the figure). The tip projects outward of the tip of the upper end of the engagement wall 22 (the engagement wall 22 on the left in the drawing).

And the engagement protrusion piece 120 comprises the temporary latching mechanism 101 with the electric wire side surface 105 in a pair of fastening caulking piece 102a formed in the fastening connection part 102 of the connection terminal 100 mentioned later.
As shown to (a) of FIG. 15, the connection terminal 100 has the wire connection part 31 and the fastening connection part 102. As shown in FIG. The connection terminal 100 provided on the grounding wire D is a press-formed product of a conductive metal plate. The fastening connection portion 102 is crimped to the terminal connection portion 21E of the terminal fitting 10E.

  The fastening connection portion 102 of the connection terminal 100 has a pair of fastening and caulking pieces 102 a. The fastening and tightening pieces 102a are raised upward from the bottom 37, respectively. In addition, the upper end portions of these fastening and caulking pieces 102 a are curved inward in an arc shape and folded back.

  As a result, a holding space S surrounded by the fastening caulking piece 102 a is formed in the fastening connection portion 102 of the connection terminal 100. Both side surfaces of the holding space S are substantially vertical surfaces by the fastening and caulking pieces 102 a raised upward, and the both side surfaces are the rotation restricting surfaces 36.

The holding space S of the fastening connection portion 102 is formed slightly larger than the outer shape of the engagement wall 22 in the terminal connection portion 21E in a front view.
And as shown to (a) of FIG. 15, (b), the fastening caulking piece 102a of the connection terminal 100 accommodated in holding space S of this fastening connection part 102 is cut in the front-end | tip part of the terminal connection part 21E. A provisionally locked state is obtained by the raised engaging projection 120.

Here, when the tip of the terminal connection portion 21E is inserted into the holding space S of the connection terminal 100, as shown in (a) to (c) of FIG. By being rotated 90 degrees counterclockwise around an axis along the insertion direction of the connection portion 21E, it is possible to pass through the gap 122 of the pair of fastening and caulking pieces 102a. Therefore, even if the projection height is increased, the engagement projection piece 120 can be smoothly inserted with a low insertion force.
Then, as shown in (a) and (b) of FIG. 15, the engagement protruding piece 120 is rotated by 90 degrees clockwise about the axis along the insertion direction of the terminal connection portion 21E. The electric wire side surface 105 is made to face the one side of the fastening caulking piece 102a, and therefore, the connection terminal 100 can be reliably held temporarily in the distal end portion of the terminal connection portion 21E.

Next, a method of temporarily locking the terminal fitting 10E and the connection terminal 100 according to the fourth embodiment of the present invention will be described.
First, as shown in (a) of FIG. 16, in the connection terminal 100, a pair of fastening and caulking pieces 102a in the fastening connection portion 102 is one engagement wall 22 in the terminal connection portion 21E (in FIG. The engagement projection pieces 120 are rotated in the counterclockwise direction by 90 degrees around the axis along the insertion direction of the terminal connection portion 21E so as to correspond to the engagement projection pieces 120 formed on the joint wall 22). The tip of the terminal connection portion 21E is inserted into the holding space S so as to pass through the gap 122 of the fastening and tightening pieces 102a.

The engagement projection piece 120 has the engagement wall 22 accommodated in the holding space S by the connection terminal 100 being rotated 90 degrees clockwise about the axis along the insertion direction of the terminal connection portion 21E.
As a result, as shown in (a) and (b) of FIG. 15, the engagement projection piece 120 is made to face the electric wire side surface 105 so as to intersect the one fastening caulking piece 102 a, so terminal connection The connection terminal 100 can be reliably brought into a temporary locking state with respect to the tip end of the portion 21E.
That is, the electric wire side surface 105 of one fastening caulking piece 102a abuts on the engaging projecting piece 120 and is locked, and movement of the connecting terminal 100 in the connecting direction from the holding space S of the connecting terminal 100 is restricted. Ru. Further, the terminal connection portion 21E inserted into the holding space S abuts the rotation restricting surface 36 formed by the both sides of the holding space S, thereby restricting the rotation around the axis along the insertion direction. In this state, the fastening connection portion 102 of the connection terminal 100 is held. Thus, the terminal connection portion 21E is maintained at a predetermined posture and position with respect to the connection terminal 100.

  Thus, the engagement protrusion piece 120 comprises the temporary locking mechanism 101 with the electric wire side surface 105 of the fastening caulking piece 102a. That is, in a state in which the electric wire side surface 105 of the fastening caulking piece 102a is engaged with the engagement projecting piece 120, the movement of the connection terminal 100 from the holding space S along the axial direction of the terminal connection portion 21E is restricted. .

Although the fastening and caulking piece 102a locked to the engaging protruding piece 120 has a fixed holding force in the axial direction of the terminal connection portion 21E with respect to the engaging protruding piece 120 of the engaging wall 22, The connection terminal 100 is rotated 90 degrees counterclockwise around the axis along the insertion direction of the terminal connection portion 21E, whereby the gap 122 of the pair of fastening and caulking pieces 102a in the fastening connection portion 102 is the engagement protrusion 120 Since it corresponds, the connection terminal 100 can be removed from the terminal connection part 21E.
Thus, the terminal fitting 10E and the connection terminal 100 are temporarily engaged with each other such that the engagement wall 22 and the fastening caulking piece 102a in the terminal connection portion 21E can be engaged and disengaged by the temporary engagement mechanism 101. It has a stop structure.

As described above, in the temporary locking structure and temporary locking method of the terminal fitting 10E according to the fourth embodiment of the present invention and the connection terminal 100, the terminal fitting 10 according to the first embodiment and the connection terminal 30 In addition to the same function and effect as the temporary locking structure, the engagement projecting piece 120 which abuts only on the electric wire side surface 105 of one fastening caulking piece 102a is made to pass through the gap 122 of the pair of fastening caulking pieces 102a. Since the tip end of the terminal connection portion 21E is inserted into the holding space S of the connection terminal 100, the tip end portion of the terminal connection portion 21E can be smoothly inserted with a low insertion force even if the protruding height of the engaging protruding piece 120 is increased. It can be inserted into the holding space S of the connection terminal 100.
Thereafter, the connection terminal 100 is rotated about an axis along the insertion direction of the terminal connection portion 21E, so that the engagement projection piece 120 is opposed to the electric wire side surface 105 so as to intersect the one fastening caulking piece 102a. As a result, the connection terminal 100 is reliably held temporarily in the distal end portion of the terminal connection portion 21E.

  The present invention is not limited to the embodiments described above, and appropriate modifications, improvements, etc. are possible. In addition, the material, shape, size, number, arrangement location, and the like of each component in the embodiment described above are arbitrary and not limited as long as the present invention can be achieved.

Here, the features of the connection structure and connection method of the terminal metal fitting according to the present invention, and the temporary locking structure and temporary locking method of the terminal metal fitting and the connection terminal are respectively described in the following [1] to [9] Put it briefly and list it.
[1] A terminal fitting (10, 10A to 10E) having a terminal body (11) and a plurality of terminal connection parts (21, 21A to 21E) extended from the terminal body,
A connection terminal (30, 70, 80, 100) connected to an end of the electric wire (grounding wire D);
The upper ends of a pair of fastening caulking pieces (32a, 72a, 82a, 102a) erected on both sides of the connecting terminal and capable of caulking and fastening the connecting terminal to the terminal fitting are folded inward. Forming a holding space (S) defined by
A pair of fastened tightening pieces (engagement wall 22) accommodated in the holding space are erected on both sides of the terminal connection portion,
A temporary engagement between the to-be-fastened caulking piece and the to-be-fastened caulking piece that engages with or disengages the to-be-fastened caulking piece when the to-be-fastened caulking piece is accommodated in the holding space. A mechanism (51, 61, 81, 101) is provided, and a temporary locking structure of the terminal fitting and the connection terminal.
[2] The temporary locking mechanism (61) is
Engaging members provided on the tip of the upper end of the pair of fastening caulking pieces (engaging wall 22) so as to abut on the electric wire side surface (75) of the pair of fastening caulking pieces (72a) Joint projection (63),
In order to avoid interference when the distal end of the terminal connection portion (21C) is inserted in an oblique direction with respect to the holding space (S), the distal end on the bottom side of the pair of fastening caulking pieces Notched relief portion (63c),
A temporary locking structure of the terminal fitting and the connection terminal according to the above [1], characterized in that:
[3] The temporary locking mechanism (81) is
The to-be-fastened caulking pieces (engagement so as to respectively face both side surfaces (the wire side surface 85a and the terminal metal fitting side surface 85b) in the connecting direction of the connection terminal (80) in the fastening caulking pieces (82a) A temporary locking structure of the terminal fitting and the connection terminal according to the above [1], characterized in that it has a pair of engaging protruding portions (91, 93) protruding from the tip end portion of the upper end portion of the wall 22).
[4] The temporary locking mechanism (101) is
The tip is cut to the side of the tip of the upper end portion of the fastened fastening piece (engagement wall 22) so as to abut only on the electric wire side surface (105) of one of the fastening fastening pieces (102a) A temporary locking structure of the terminal fitting and the connection terminal according to the above [1], characterized by having a hook-shaped protruding piece (120) formed.
[5] The pair of fastening and caulking pieces (32a, 72a, 82a, 102a) in the connection terminals (30, 70, 80, 100) according to the above [1] are the to-be-fastened caulking pieces (engagement and engagement) A connection structure of a terminal fitting characterized in that it is crimped to a wall 22) and the connection terminal is crimped and fastened to the terminal fitting (10, 10A to 10E).
[6] A wire (grounded) to a terminal fitting (10, 10A to 10E) having a terminal body (11) and a plurality of terminal connection portions (21, 21A to 21E) extended from the terminal body A pair of fastening and caulking pieces (32a, 72a, 82a, 102a) of the connection terminal (30, 70, 80, 100) connected to the end of the electric wire D) are formed on both sides of the terminal connection portion Temporary locking of the terminal metal fitting and the connection terminal (30, 70, 80, 100) in the connection method of the terminal metal fitting (10, 10A to 10E) to be crimped and connected to the pair of fastened tightening pieces (engagement wall 22) Method,
A holding space (S) capable of accommodating the pair of fastening and tightening pieces by folding back the upper end portions of the pair of fastening and tightening pieces erected on both sides of the connection terminal respectively to the connection terminal Step of defining
The pair of fastening and caulking pieces is provided by a temporary locking mechanism (51, 61, 81, 101) provided between the terminal connection portion and the connection terminal by inserting the fastening and caulking pieces into the holding space. And a step of releasably locking the pair of the fastening and clamping pieces.
[7] The temporary locking mechanism (81) is provided at an upper end portion of the fastening caulking piece (engaging wall 22) so as to abut on the electric wire side surface (85a) of the fastening caulking piece (82a). It has an engaging projection (91) protruding from the tip end,
The upper end of the fastening caulking piece is hooked on the base end side of the upper end of the fastening caulking piece, and the connection terminal (80) is used as the fulcrum with the upper end of the fastening caulking piece as a fulcrum 21D), by rotating around an axis along the insertion direction, the temporary fastening piece is accommodated in the holding space (S), and the temporary fitting of the terminal fitting and the connection terminal according to the above [6] is characterized in that Locking method.
[8] The tightening engagement piece (engagement wall 22) of the to-be-fastened tightening piece (engagement wall 22) so that the temporary locking mechanism (101) contacts only the electric wire side surface (105) of one of the tightening and tightening pieces (102a). The engagement projection (120) is formed by cutting and raising the tip to the side of the tip at the upper end,
The distal end portion of the terminal connection portion (21E) is inserted into the holding space (S) so that the engagement projection piece passes between the pair of fastening and caulking pieces, and the connection terminal (100) is The temporary engagement between the terminal fitting and the connection terminal according to the above [6], wherein the clamped fastening piece is accommodated in the holding space by rotating around an axis along the insertion direction of the terminal connection portion. Method.
[9] A wire (grounded) to a terminal fitting (10, 10A to 10E) having a terminal body (11) and a plurality of terminal connection portions (21, 21A to 21E) extended from the terminal body A pair of fastening and caulking pieces (32a, 72a, 82a, 102a) of the connection terminal (30, 70, 80, 100) connected to the end of the electric wire D) are formed on both sides of the terminal connection portion It is a connection method of the terminal metal fitting (10, 10A-10E) crimped and connected to a pair of to-be-fastened caulking pieces (engagement wall 22),
By holding back the upper end portions of the pair of fastening and caulking pieces erected on both sides of the connection terminal, the holding terminals (S) in which the pair of fastening and caulking pieces can be accommodated can be stored in the connecting terminal. Forming process defined in
The pair of fastening and caulking pieces is provided by a temporary locking mechanism (51, 61, 81, 101) provided between the terminal connection portion and the connection terminal by inserting the fastening and caulking pieces into the holding space. A temporary locking step for releasably locking the pair of fastened and tightened pieces;
And a caulking step of crushing the fastening caulking pieces and caulking the pair of the fastening caulking pieces in the holding space.

DESCRIPTION OF SYMBOLS 10 Terminal metal fitting 11 Terminal main body 21 Terminal connection part 22 Engagement wall (clamped piece to be fastened)
Reference Signs List 30 connection terminal 32 fastening connection portion 32a fastening caulking piece 51 temporary locking mechanism 53 engagement protrusion 55 electric wire side surface D grounding electric wire (electric wire)
S holding space

Claims (9)

A terminal fitting including a terminal body and a plurality of terminal connection portions extended from the terminal body;
And a connection terminal connected to the end of the wire;
In the connection terminal, there is formed a holding space defined by folding back the upper end portions of a pair of fastening caulking pieces which are erected on both sides and capable of caulking and fastening the connecting terminal to the terminal fitting. And
A pair of to-be-fastened fastening pieces accommodated in the holding space are erected on both sides of the terminal connection portion,
A temporary engagement between the to-be-fastened caulking piece and the to-be-fastened caulking piece that engages with or disengages the to-be-fastened caulking piece when the to-be-fastened caulking piece is accommodated in the holding space. A temporary locking structure of a terminal fitting and a connection terminal characterized in that a mechanism is provided. The temporary locking mechanism is
An engagement protrusion which is provided so as to protrude from the tip of the upper end of the pair of fastening caulking pieces so as to abut on the electric wire side surface of the pair of fastening caulking pieces;
In order to avoid interference when the end of the terminal connection portion is inserted in an oblique direction with respect to the holding space, a relief formed in the end on the bottom side of the pair of fastening tightening pieces Department,
The temporary locking structure of the terminal metal fitting and the connection terminal according to claim 1, characterized in that: The temporary locking mechanism is
It has a pair of engaging projection parts protrudingly provided in the tip part in the upper end part of the above-mentioned to-be-fastened caulking piece so as to respectively oppose the both sides along the connection direction of the above-mentioned connection terminal in the above-mentioned fastening caulking piece The temporary locking structure of the terminal metal fitting of Claim 1 and a connection terminal characterized by the above-mentioned. The temporary locking mechanism is
It has an engaging projection formed by cutting and raising the tip to the side of the tip end of the upper end of the to-be-fastened caulking piece so as to abut only on the electric wire side surface of one of the fastening and caulking pieces. The temporary locking structure of the terminal metal fitting of Claim 1 and a connection terminal characterized by the above-mentioned.   The pair of fastening and caulking pieces in the connection terminal according to any one of claims 1 to 4 are caulked on the to-be-fastened caulking piece, and the connection terminal is caulked and fastened on the terminal fitting. Connection of terminal fittings characterized by having A terminal fitting having a terminal body and a plurality of terminal connection portions extended from the terminal body, a pair of fastening and caulking pieces of the connection terminal connected to the end of the electric wire of the terminal connection portion It is a temporary locking method of the terminal metal fitting and the connection terminal in the connection method of the terminal metal fitting that is caulked and connected to a pair of fastened tightening pieces formed on both sides,
By folding back the upper end portions of the pair of fastening and caulking pieces provided upright on both sides of the connection terminal, a holding space capable of accommodating the pair of fastening and caulking pieces is defined in the connecting terminal. The process to
The pair of fastening and caulking pieces is held by the temporary locking mechanism provided between the terminal connection portion and the connection terminal by storing the fastening and fastening pieces in the holding space. And a step of releasably locking the terminal fitting. The temporary locking mechanism has an engagement protrusion which is provided so as to protrude from the tip end of the upper end of the fastening and fastening piece so as to abut on the electric wire side surface of the fastening and fastening piece.
The upper end of the fastening caulking piece is hooked on the base end side of the upper end of the fastening caulking piece, and the connection terminal is used as a fulcrum with the upper end of the fastening caulking piece as a fulcrum The method for temporarily locking the terminal fitting and the connection terminal according to claim 6, wherein the to-be-fastened caulking piece is accommodated in the holding space by rotating around an axis along the axis. An engagement formed by cutting and raising a tip of the upper end portion of the to-be-fastened clamping piece so that the temporary locking mechanism abuts only the electric wire side surface of one of the to-be-fastened clamping pieces With a mating piece,
The distal end portion of the terminal connection portion is inserted into the holding space such that the engagement projection piece passes between the pair of fastening and caulking pieces, and an axis along the insertion direction of the terminal connection portion The method for temporarily locking the terminal fitting and the connection terminal according to claim 6, wherein the to-be-fastened caulking piece is accommodated in the holding space by rotating around. A terminal fitting having a terminal body and a plurality of terminal connection portions extended from the terminal body, a pair of fastening and caulking pieces of the connection terminal connected to the end of the electric wire of the terminal connection portion It is a connection method of the terminal metal fitting which crimps and connects with a pair of to-be-fastened caulking pieces formed in the both sides,
By folding back the upper end portions of the pair of fastening and caulking pieces erected on both sides of the connection terminal respectively, a holding space in which the pair of fastening and caulking pieces can be accommodated is defined in the connecting terminal Forming process,
The pair of fastening and caulking pieces are inserted into the pair of fastening and caulking pieces by the temporary locking mechanism provided between the terminal connection portion and the connection terminal by inserting the fastening and caulking pieces into the holding space. A temporary locking process for detachably locking to the
And a caulking step of crushing the fastening caulking pieces and caulking the pair of the fastening caulking pieces in the holding space.

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