JP2024044830A - Electric wire with connecting fittings and method for manufacturing electric wires with connecting fittings - Google Patents

Abstract

[Problem] To provide an electric wire with a connecting fitting and a method for manufacturing the electric wire with a connecting fitting that can suppress damage to the connection points between the conductor and the connecting fitting. [Solution] An electric wire with a connecting fitting (1) includes a covered electric wire (10) in which a conductor (11) is covered with an insulating covering (12) and a predetermined range of the insulating covering (12) is stripped from a tip side (LF) to expose the conductor (11), and a bus bar (20) to which the exposed conductor (11) is connected, the bus bar (20) is provided with a connection part (21) that is connected to a connection target and a conductor connection part (23) that is connected to the conductor (11), the exposed conductor (11) is disposed on a base side (LB) of the conductor connection part (23) and is provided with a wire restricting part (30) that restricts movement of the conductor (11) to an upper side (HU), and the tip of the insulating covering (12) of the covered electric wire (10) is located on the base side (LB) of the conductor connection part (23) and the base side (LB) of the wire restricting part (30). [Selected Figure] FIG.

Description

This invention relates to an electric wire with a connecting fitting, in which a conductor exposed at the tip of a covered electric wire is connected to a connecting fitting such as a connection terminal or a bus bar by welding or the like, and to a method for manufacturing the electric wire with a connecting fitting.

Conventionally, electric wires with connecting fittings, in which a conductor exposed at the tip of a coated electric wire is connected by welding or the like to a connecting fitting such as a connection terminal or a bus bar, have been used in various fields. For example, Patent Document 1 discloses an electric wire with connecting fittings that connects an electric wire to a bus bar that is connected to a battery housed in a battery module pack.

This bus bar has a connection part that connects to the battery and a conductor connection part that connects to the conductor, and the conductor connection part is provided with a protrusion that projects toward the side opposite to the side where the battery is placed. ing. Then, the conductor exposed from the covered electric wire is overlapped and welded onto this protrusion, thereby connecting the bus bar and the electric wire and making them conductive.

However, if an external force acts on the insulated wire connected to the bus bar due to tension acting on the insulated wire or the vehicle vibrating, the external force propagates through the insulated wire and acts on the connection point between the conductor and the conductor connection part, which can damage the connection point and reduce the conductivity between the conductor and the bus bar.

Japanese Patent Application Publication No. 2011-40332

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electric wire with a connecting fitting and a method of manufacturing the electric wire with a connecting fitting, which can suppress damage to a connection point between a conductor and a connecting fitting.

The present invention is provided with a covered electric wire in which a conductor is coated with an insulating coating, a predetermined range of the insulating coating is peeled off from the tip side to expose the conductor, and a connecting fitting to which the exposed conductor is connected, The connection fitting is provided with a connection part to be connected to a connection target and a conductor connection part to be connected to the conductor, and extends in a direction in which the covered electric wire in the conductor connection part to which the conductor is connected extends. a direction in which the conductor connected to the conductor connection part is separated from the conductor connection part is a separation direction; the exposed conductor is disposed in the extending direction in the conductor connection part; A wire regulating section for regulating the movement of the conductor in the separation direction is provided, and a tip of the insulating coating of the covered wire is further disposed in the extending direction than an end of the conductor connecting section and the wire regulating section in the extending direction. It is characterized by an electric wire with a connecting fitting provided in the output direction.
The connection refers to a state in which the parts are integrated in a conductive manner by welding such as ultrasonic welding, vibration welding, laser welding, adhesion with a conductive adhesive, or caulking.

According to this invention, damage to the connection portion between the conductor and the connection fitting can be suppressed.
Specifically, the tip of the insulating coating is provided at a predetermined distance from the ends of the conductor connection section and the wire regulation section in the extending direction. That is, the conductor, which has lower rigidity than the covered electric wire, is arranged in an exposed state between the ends of the conductor connection portion and the wire restriction portion in the extending direction and the insulating coating. Thereby, even if an external force acts on the covered wire so that the conductor moves in the direction of separation, the conductor can absorb the external force that propagates toward the conductor connection portion via the conductor. Therefore, it is possible to suppress the external force from propagating to the connection point between the conductor and the conductor connection portion.

Further, the movement of the conductor in the direction of separation, in which the external force propagating to the connection point with the conductor connection portion is suppressed, can be further restricted by the wire restriction portion. More specifically, even if a propagated external force acts on the conductor disposed in the wire regulating section and moves it in the separating direction, the conductor comes into contact with the wire regulating section, so that movement of the conductor in the separating direction is restricted. Therefore, it is possible to prevent the conductor from moving in the separating direction and damaging the connection point between the conductor and the conductor connection portion.

As an aspect of the present invention, the wire regulating portion may be provided so as to protrude in the extending direction from an end portion in the extending direction.
According to the present invention, the length from the connection point of the conductor connected to the conductor connecting part to the tip of the insulating coating, i.e., the length of the exposed conductor, can be increased, so that the conductor can more reliably absorb the external force propagating toward the conductor connecting part between the tip of the insulating coating and the end of the wire restricting part in the extending direction. Therefore, the conductor can be more reliably prevented from moving away from the conductor due to the external force, and the connection point between the conductor and the conductor connecting part can be more reliably prevented from being damaged.

As a further aspect of the present invention, a chamfered portion may be provided at corners of the electric wire regulating portion in the extending direction and in the separating direction.
According to the present invention, the conductor that is moved in the direction away from the conductor by the external force propagated to the conductor can be prevented from hitting the wire restricting portion at a corner, and therefore the conductor can be prevented from interfering with the wire restricting portion and being damaged, thereby ensuring stable conductivity between the conductor and the conductor connection portion.

As a further aspect of the present invention, a buffer material may be disposed between the electric wire restricting portion and the conductor disposed in the electric wire restricting portion.
According to this invention, since the conductor can be prevented from directly contacting the wire restricting portion, damage to the conductor due to contact with the wire restricting portion can be prevented, and stable conductivity between the conductor and the conductor connection portion can be ensured.

Further, as an aspect of the present invention, the wire regulating portion may be formed into a substantially cylindrical shape having a predetermined length in the extending direction.
The above-mentioned substantially cylindrical shape has a cross section perpendicular to the extending direction of a closed cross section of a circle, an ellipse, or a polygon, and an opening through which the conductor cannot pass, which is arranged in the separating direction or in a direction crossing the separating direction. It includes a substantially cylindrical shape with an open cross section, such as a U-shape, a U-shape, and a square U-shape.

With this invention, the wire restricting portion has a predetermined length in the extension direction, so the length of the conductor between the tip of the insulating coating and the connection point with the conductor connection portion can be made sufficiently long. This ensures that the external force propagating from the conductor toward the conductor connection portion can be absorbed between the tip of the insulating coating and the end of the wire restricting portion in the extension direction. In addition, the wire restricting portion can protect the conductor so that it does not interfere with other components.

Further, as an aspect of the present invention, the conductor connecting portion has a planar portion, and the wire regulating portion is in an inclined position relative to the planar portion in the separating direction or in a direction opposite to the separating direction. It's okay.
The above-mentioned inclination in the separating direction or the opposite direction to the separating direction with respect to the planar portion means that the wire regulating portion is inclined in the in-plane direction or out of plane with respect to the main surface connecting the conductor in the planar portion. Refers to tilting in a direction.

According to the present invention, since the wire regulating portion is inclined with respect to the planar portion, the conductor extending from the conductor connecting portion is bent, and the influence of external force acting on the connection point between the conductor connecting portion and the conductor is reduced. Can be done. Thereby, it is possible to more reliably suppress damage to the connection portion between the conductor connection portion and the conductor.

In another aspect of the present invention, the conductor connection part has a planar portion, and the electric wire restriction part is provided at an end of the conductor connection part in the extension direction, and is formed in a frame shape with a separation restriction part that restricts the movement of the conductor in the separation direction from the planar portion to which the conductor is connected, and a pair of legs that restrict the movement of the insulated electric wire in a cross direction that crosses the separation direction, and may be a frame shape that protrudes from the planar portion.

a separation regulating part that regulates movement of the covered electric wire in the separating direction from the planar portion to which the conductor is connected; and a separation regulating part that restricts movement of the covered electric wire in a cross direction that intersects with the separating direction. Formed into a frame shape with a pair of legs means a rectangular U-shape, U-shape, H-shape, etc. in which the spacing regulating part and the legs extend in different directions, or the spacing regulating part and the legs are continuous. It may be formed into a frame shape with a semicircular shape, a semielliptical shape, an arc shape, etc., or furthermore, it may be formed into a frame shape with the intersecting portion of a pair of legs inclined toward each other as a separation regulating portion. Good too. That is, in the cross section of the conductor connected to the planar portion, the frame formed by the separation regulating portion and the pair of legs extends in any direction out of the plane of the main surface of the planar portion. It is sufficient if the movement of the conductor can be restricted. Note that restricting the movement of the conductor may mean that the frame-shaped body and the inserted conductor are in contact with each other in a normal state, or that a gap is provided.

This invention allows the conductor to be easily inserted into the frame-shaped body, and the frame-shaped body can restrict not only the movement of the conductor in the direction away from the conductor, but also the movement in a direction intersecting the direction away from the conductor and the extension direction. This makes it possible to easily and reliably prevent damage to the connection between the conductor and the conductor connection part.

Further, as an aspect of the invention, the conductor connecting portion has a planar portion, and the wire regulating portion intersects with a spacing regulating portion that regulates movement of the conductor in the spacing direction. The frame-shaped body is formed into a frame shape with a pair of legs that restrict the movement of the covered wire in the cross direction, and the frame-shaped body projects from the planar part, and the frame-shaped body A connecting portion may be provided which is arranged at a predetermined interval from the portion in the extending direction and connects each of the leg portions and an end portion of the conductor connecting portion.

The connecting portion may be configured as a pair as long as it can connect a pair of legs to the end of the conductor connection portion, or a single connecting portion may connect a pair of legs to the end of the conductor connection portion. In addition, the connecting portion configured as a pair that connects a pair of legs to the end of the conductor connection portion may be continuous in the extension direction and cross-sectional shape of each of the legs and each of the connecting portions, or may be formed discontinuously.

This invention allows the conductor to be reliably exposed between the end of the wire restricting part in the extension direction and the tip of the insulating coating, and the length of the exposed conductor can be made to be a predetermined length or longer. This allows the exposed conductor to absorb the external force propagating, and prevents the external force from propagating to the connection point between the conductor and the conductor connection part.

As a further aspect of the present invention, the frame-shaped body may be in an inclined position inclined in the extending direction or in a direction opposite to the extending direction.
According to this invention, the frame-shaped body is inclined either in the extension direction or in the direction opposite to the extension direction, so that a bend is generated in the conductor extending from the conductor connection portion, thereby reducing the effect of the propagation force acting on the connection point between the conductor connection portion and the conductor.

Further, as an aspect of the present invention, the conductor inserted through the wire regulating portion may be crimped to the wire regulating portion.
According to the present invention, it is possible to reliably prevent the external force reduced by the conductor between the tip of the insulation coating and the wire regulating portion from being transmitted to the connection point between the conductor and the conductor connection portion. Therefore, damage to the connection portion between the conductor and the conductor connection portion can be reliably prevented.

The present invention also relates to a method for manufacturing a wire with a connector, in which a predetermined range of the insulating coating is stripped from the tip side of a coated electric wire, the conductor is exposed, and the conductor is connected to a connector, and the connector has a connection part that is connected to a connection target and a conductor connection part that is connected to the conductor, and the side of the coated electric wire in the conductor connection part to which the conductor is connected is defined as the extension direction, and the side of the conductor connected to the conductor connection part that moves away from the conductor connection part is defined as the separation direction, and the conductor extending in the extension direction is arranged in the conductor connection part, and a wire restriction part that restricts the movement of the conductor in the separation direction is provided, and the insulating coating at the tip of the coated electric wire is stripped so that the conductor is exposed longer than the length from the connection point between the conductor and the conductor connection part to the end of the conductor connection part in the extension direction, and the exposed conductor is placed in the wire restriction part, and the tip of the conductor is placed at a predetermined position in the conductor connection part, and the conductor is connected to the conductor connection part.

According to this invention, even if an external force acts on the covered wire so that the conductors move away from each other, the external force propagating toward the conductor connection can be transferred to the exposed conductor between the tip of the insulation coating and the conductor connection. It is possible to manufacture an electric wire with a connecting fitting that absorbs the damage caused by the electric wire, and restricts the movement of the conductor in the separation direction with the electric wire regulating portion, thereby suppressing damage to the connection point between the conductor and the connecting fitting.

Further, as an aspect of the present invention, the conductor connecting portion has a planar portion, and the wire regulating portion is provided at an end of the conductor connecting portion on a side where the covered electric wire extends, and the conductor is connected to the conductor connecting portion. a frame including a spacing regulating part that regulates movement of the covered electric wire from the planar part that is separated from the covered electric wire in the separating direction; and a pair of legs that regulates movement of the covered electric wire in a direction crossing the separating direction. is a frame-shaped body that is formed in a shape and projects from the planar portion, and after the exposed conductor is placed in the wire regulating section and the tip of the conductor is placed at a predetermined position in the conductor connecting section. , the frame-like body may be inclined toward a side where the conductor connection portion is arranged, and the conductor may be connected to the conductor connection portion.

According to the present invention, it is possible to manufacture an electric wire with a connecting fitting that has stable conductivity between the insulated electric wire and the connecting fitting and that can suppress damage to the connection points between the conductor and the connecting fitting.
In more detail, even if an unintended external force acts on the insulated electric wire in the process of tilting the frame in which the exposed conductor is arranged, the conductor is not connected to the conductor connecting part, so there is no effect on the connection point between the conductor connecting part and the insulated electric wire. In other words, it is possible to manufacture an electric wire with a connection fitting without having to worry about deformation of the connection point between the conductor and the conductor connecting part, thereby improving work efficiency.

In addition, since the conductor and the conductor connection part are connected after tilting the frame-shaped body, no external force is applied in an unintended direction after connection, and electricity can be reliably conducted between the covered wire and the connection fitting. . As a result, it is possible to manufacture an electric wire with a connecting fitting that has stable conductivity between the covered wire and the connecting fitting and can suppress damage to the connection portion between the conductor and the connecting fitting. Incidentally, by tilting the electric wire regulating section, the location where the conductor is arranged can be narrowed, so that the position of the conductor can be regulated as a step before connecting the conductor and the conductor connecting section.

According to the present invention, it is possible to provide an electric wire with a connecting fitting and a method of manufacturing the electric wire with a connecting fitting, which can suppress damage to a connection point between a conductor and a connecting fitting.

An explanatory diagram of an electric wire with a connection fitting. An explanatory diagram of an electric wire with connecting fittings. An explanatory diagram of a method of manufacturing an electric wire with a connecting fitting. FIG. 13 is an explanatory diagram of a modified example of the electric wire with a connecting fitting. An explanatory diagram of a modification of the electric wire with a connecting fitting. An explanatory diagram of a modification of the electric wire with a connecting fitting. An explanatory diagram of another electric wire with a connecting fitting. An explanatory diagram of another electric wire with a connecting fitting. An explanatory diagram of another method of manufacturing an electric wire with a connecting fitting. An explanatory diagram of another electric wire with a connecting fitting. FIG. 11 is an explanatory diagram of another electric wire with connecting fittings. 13A to 13C are explanatory diagrams illustrating another method for manufacturing an electric wire with a connector fitting.

An embodiment of this invention will be described below with reference to the drawings.
(First embodiment)
First, an electric wire 1 with a connecting fitting according to a first embodiment will be explained using FIGS. 1 to 3.

1 and 2 are explanatory diagrams of an electric wire with a connector fitting 1, and FIG. 3 is an explanatory diagram of a method for manufacturing the electric wire with a connector fitting 1.
More specifically, Fig. 1(a) shows a schematic perspective view of the electric wire with a connecting fitting 1 as viewed from the tip side LF and the upper side HU, Fig. 1(b) shows a cross-sectional view taken along the line A-A in Fig. 2(a), Fig. 2(a) shows a plan view of the electric wire with a connecting fitting 1, and Fig. 2(b) shows a cross-sectional view taken along the line B-B in Fig. 2(a).

Figure 3(a) shows a schematic perspective view of the insulated electric wire 10 before it is placed on the bus bar 20, and Figure 3(b) shows a schematic perspective view of the insulated electric wire 10 placed on the electric wire restricting portion 30 of the bus bar 20. Here, Figure 3 shows a schematic perspective view of the tip side LF and the upper side HU of the electric wire with connecting fitting 1.

The left-right direction in Fig. 2 is the longitudinal direction L, the up-down direction in Fig. 2(a) is the width direction W, and the up-down direction in Fig. 2(b) is the height direction H. Furthermore, in the longitudinal direction L, the left side in Fig. 2 is the tip side LF, and the right side in Fig. 2 is the base side LB. In addition, in the width direction W, the upper side in Fig. 2(a) is the left side WL, the lower side in Fig. 2(a) is the right side WR, and in the height direction H, the upper side in Fig. 2(b) is the upper side HU, and the lower side in Fig. 2(b) is the lower side HD.

The electric wire with connecting fitting 1 is configured by physically and electrically connecting a covered electric wire 10 having a conductor 11 covered with an insulating covering 12 to a bus bar 20 which is a connecting fitting.
The coated electric wire 10 is composed of a conductor 11 disposed at the center and an insulating coating 12 that covers the outside of the conductor 11. At a tip side LF of the coated electric wire 10, a part of the insulating coating 12 is peeled off to expose the conductor 11.

The coated electric wire 10 may be either a trunk wire or a branch wire branched off from the trunk wire in a wire harness formed by bundling multiple electric wires. The coated electric wire 10 may also be a signal wire, a power wire, or an earth wire.

The bus bar 20 has, in this order, a connecting part 21 connected to the connection target, an intermediate part 22, and a conductor connecting part 23 to which the conductor 11 of the covered electric wire 10 is connected, from the distal end side LF to the proximal side LB. It is constructed by bending a conductive plate material having an appropriate length in the width direction W.

The connection portion 21 and the conductor connection portion 23 are formed of a planar plate having a planar portion of approximately the same shape on one surface. That is, the normal directions of the main surfaces of the connection portion 21 and the conductor connection portion 23 are both in the height direction H. The intermediate portion 22 is formed so as to connect the end of the base end side LB of the connection portion 21 and the end of the tip side LF of the conductor connection portion 23 in the height direction H, and the busbar 20 is formed in a stepped shape. The connection object connected to the connection portion 21 is located on the lower side HD of the connection portion 21.

An electric wire restricting portion 30 is provided at the center in the width direction W of the end portion on the base end side LB of the conductor connecting portion 23, and extends toward the base end side LB.
The wire restricting portion 30 has a predetermined length in the longitudinal direction L, and is formed into a substantially cylindrical columnar body by rolling a plate material from both sides in the width direction W, as shown in FIG. 1( b ).

The wire regulating portion 30 is bent by providing a slight gap between the ends of the rolled plate material in the upper HU, and has a substantially cylindrical insertion space 30X (FIG. 2) through which the covered wire 10 is inserted. b)) is formed inside.

The diameter of the approximately cylindrical insertion space 30X through which the covered wire 10 is inserted, that is, the inner diameter of the wire regulating portion 30, is set to be one size larger than the outer diameter of the conductor 11. That is, in a state where the conductor 11 is placed on the wire regulating section 30, a gap is created between the conductor 11 and the wire regulating section 30.
In addition, a chamfered portion 30Y having an arcuate cross section is provided at a corner on the inner surface side of the base end side LB of the wire regulating portion 30, as shown in FIG. 2(b).

The conductor 11, which is exposed by removing the insulating coating 12, is inserted into the wire restricting portion 30 of the busbar 20 thus formed, and the tip portion of the conductor 11 is arranged along the longitudinal direction L at the conductor connection portion 23. A welded portion 40 is formed by welding the conductor 11 and the conductor connection portion 23 between the conductor connection portion 23 and the tip portion of the conductor 11. As shown in Figures 1 and 2, the tip portion of the conductor 11, the conductor connection portion 23, and the welded portion 40 formed by welding are integrated by welding heat, but in this specification, the welded integrated conductor 11, conductor connection portion 23, and welded portion 40 are described as being configured separately.

In this way, the conductor connecting portion 23 and the conductor 11 are electrically and physically connected by the welding portion 40 extending in the longitudinal direction L, that is, the bus bar 20 and the covered wire 10 are electrically and physically connected. This constitutes an electric wire 1 with a connecting fitting.
Note that as a welding method for welding the conductor 11 to the conductor connection portion 23 to form the welded portion 40, an appropriate welding method such as ultrasonic welding, vibration welding, or laser welding may be used.

In the electric wire 1 with a connecting fitting in which the distal end portion of the conductor 11 and the conductor connecting portion 23 are welded together, the distal end of the insulation coating 12 is located on the proximal end side of the wire regulating portion 30, as shown in FIGS. 1 and 2. It is arranged at a position separated from the end of LB by a predetermined distance. In other words, on the tip side LF of the covered wire 10, at least the length of the conductor 11 disposed along the longitudinal direction L at a desired position of the conductor connecting portion 23, and the length of the wire regulating portion 30 along the longitudinal direction L. A portion of the insulation coating 12 that is longer than the sum of the lengths is removed. Therefore, the conductor 11, which has lower rigidity than the covered wire 10 in which the conductor 11 is covered with the insulation sheath 12, is placed between the wire regulating part 30 and the insulation sheath 12 along the longitudinal direction L in an exposed state. .

Next, a method for manufacturing the electric wire with connector fitting 1 will be described with reference to FIG.
A predetermined length of the insulating coating 12 at the tip side LF of the insulated wire 10, more specifically, a length longer than the sum of the length of the conductor 11 arranged along the longitudinal direction L at at least the desired position of the conductor connection portion 23 and the length of the wire regulating portion 30 along the longitudinal direction L, is peeled off to expose the conductor 11, and the conductor 11 is placed on the base side LB of the wire regulating portion 30 of the busbar 20, as shown in FIG. 3(a).

Next, the conductor 11 is inserted into the insertion space 30X of the wire restriction part 30 from the base end side LB of the wire restriction part 30, and as shown in FIG. The tip portion of is arranged along the longitudinal direction L. Then, the boundary portion between the upper surface of the conductor connecting portion 23 and the conductor 11 arranged along the longitudinal direction L is welded in the longitudinal direction L to complete the electric wire 1 with a connecting fitting.

In the electric wire 1 with a connecting fitting configured in this manner, the welded portion 40 is formed along the longitudinal direction L, so even if an external force toward the proximal end side LB acts on the welded portion 40, the welded portion 40 is The resistance to external forces is large. However, if an external force acts on the upper HU where the conductor 11 is separated from the conductor connection part 23, in the width direction W along the upper surface of the conductor connection part 23, or in the diagonal direction of the upper HU and the width direction W, the weld part 40 There is a risk that the material may peel off or be damaged from the end portion of the material 40 in the longitudinal direction L.

However, in the electric wire 1 with a connecting fitting, the tip of the insulating coating 12 is arranged closer to the proximal side LB than the end of the electric wire regulating part 30 on the proximal side LB. That is, the conductor 11, which has lower rigidity than the covered electric wire 10, is exposed on the proximal side LB of the wire regulating portion 30 rather than the end portion of the proximal side LB. Therefore, the conductor 11 disposed at the connection point between the tip of the insulation coating 12 and the conductor connection portion 23 acts on the covered wire 10 extending to the proximal end side LB, and the external force F1 propagating to the distal end side LF is It can be absorbed and reduced. Thereby, the propagation force propagated to the tip side LF acts on the welded part 40, and it is possible to suppress the welded part 40 from peeling off from the end in the longitudinal direction L or being damaged.

Even the propagation force absorbed and attenuated in this way may act on the conductor 11 and cause the conductor 11 to move toward the upper HU. However, in the electric wire 1 with a connecting fitting, the conductor 11 is inserted through the insertion space 30X of the wire regulating part 30, so even if the conductor 11 moves to the upper HU due to the action of propagation force, the conductor 11 will not pass through the wire regulating part 30. 30 to further restrict the movement of the conductor 11 toward the upper HU. Thereby, it is possible to prevent the welded portion 40 from peeling off from the end portion in the longitudinal direction L or being damaged.

Even if the external force F1 is excessively transmitted to the conductor 11 toward the upper side HU, the external force F1 can be converted into a converted external force F2 toward the base end side LB, with the abutment point between the end of the base end side LB of the wire restricting part 30 and the conductor 11 as a fulcrum (see FIG. 2(b)). Here, as described above, the welded part 40 has a large resistance to the converted external force F2 toward the base end side LB, so that the end of the welded part 40 in the longitudinal direction L can be prevented from peeling off or being damaged.

The electric wire 1 with a connecting fitting configured in this way has a conductor 11 covered with an insulating coating 12, a covered electric wire 10 in which a predetermined range of the insulating coating 12 is peeled off from the tip side LF to expose the conductor 11, and the exposed conductor. 11 is connected to the bus bar 20, and the bus bar 20 is provided with a connection part 21 to be connected to a connection object and a conductor connection part 23 to be connected to the conductor 11. Here, the direction in which the covered wire 10 extends in the conductor connection part 23 to which the conductor 11 is connected is defined as the base end side LB, and the direction in which the conductor 11 connected to the conductor connection part 23 is separated from the conductor connection part 23 is defined as the upper side. HU. The exposed conductor 11 is disposed on the base end side LB of the conductor connection part 23, and a wire restriction part 30 is provided to restrict the movement of the conductor 11 to the upper side HU. The distal end thereof is provided closer to the proximal side LB than the end portions of the conductor connecting portion 23 and the wire regulating portion 30 on the proximal side LB.

Thereby, damage to the welded portion 40, which is the connection point between the conductor 11 and the bus bar 20, can be suppressed.
To explain in detail, the tip of the insulating coating 12 is provided at a predetermined distance from the end of the base end LB of the wire regulating section 30. That is, the conductor 11, which has lower rigidity than the covered wire 10, is arranged in an exposed state between the base end LB end of the wire regulating portion 30 and the insulating sheath 12. Thereby, even if the external force F1 acts on the covered wire 10 toward the upper HU, the conductor 11 can absorb the external force F1 propagating toward the conductor connection portion 23 via the conductor 11. Therefore, it is possible to suppress the external force F1 from propagating as a propagation force to the welded portion 40 between the conductor 11 and the conductor connection portion 23.

Furthermore, by placing the conductor 11 in the wire restriction section 30, the movement of the conductor 11 to the upper HU, in which the propagation force propagating to the welded section 40 connecting the conductor 11 and the conductor connection section 23 is suppressed, can be restricted by the wire restriction section 30. More specifically, even if the propagated force acts on the conductor 11 placed in the wire restriction section 30 and causes it to move to the upper HU, the conductor 11 comes into contact with the wire restriction section 30, and the movement of the conductor 11 to the upper HU is restricted. Therefore, it is possible to prevent the conductor 11 from moving to the upper HU and damaging the welded section 40 between the conductor 11 and the conductor connection section 23.

In addition, by protruding from the end of the proximal side LB toward the proximal side LB, the wire regulating section 30 is arranged to extend from the welded section 40 of the conductor 11 connected to the conductor connecting section 23 to the tip of the insulation coating 12. In other words, the length of the exposed conductor 11 can be made longer. Therefore, the external force F1 propagating toward the conductor connection section 23 can be more reliably absorbed by the conductor 11 between the tip of the insulating coating 12 and the end of the base end LB of the wire regulating section 30. Therefore, the movement of the conductor 11 toward the upper side HU due to the external force F1 can be more reliably suppressed, and damage to the welded portion 40 between the conductor 11 and the conductor connecting portion 23 can be more reliably suppressed.

In addition, chamfered portions 30Y are provided at the corners of the base end side LB and upper side HU of the wire regulation portion 30. This prevents the conductor 11, which has moved to the upper side HU due to an external force transmitted to the conductor 11, from hitting the corners of the wire regulation portion 30, and prevents the conductor 11 from interfering with the wire regulation portion 30 and being damaged. This ensures stable conductivity between the conductor 11 and the conductor connection portion 23.

Further, the wire regulating portion 30 is formed into a substantially cylindrical shape having a predetermined length on the base end side LB. As a result, the wire regulating portion 30 has a predetermined length on the base end side LB, so that the length of the conductor 11 between the tip of the insulation coating 12 and the welded portion 40 of the conductor connection portion 23 can be made sufficiently long. Can be done. This allows the conductor 11 to reliably absorb the propagation force propagating toward the conductor connection section 23 between the tip of the insulating coating 12 and the end of the base end LB of the wire regulating section 30. In addition, the conductor 11 can be protected by the wire regulating section 30 so that the conductor 11 does not interfere with other members.

In the electric wire 1 with a connecting fitting, the wire regulating part 30 has an inner diameter one size larger than the outer diameter of the conductor 11. For example, after the conductor 11 is inserted through the wire regulating part 30, the wire regulating part 30 The conductor 11 may be crimped by crimping. As a result, since the conductor 11 can be crimped with the wire regulating section 30, the propagation force reduced in the conductor 11 between the tip of the insulation coating 12 and the wire regulating section 30 is transferred to the connection between the conductor 11 and the conductor connecting section 23. It is possible to reliably prevent this from being transmitted to the welded portion 40. Therefore, damage to the welded portion 40 between the conductor 11 and the conductor connection portion 23 can be reliably prevented.

In the above-mentioned electric wire 1 with a connecting fitting, the wire regulating part 30 is formed by bending a rounded plate with a slight gap between the ends of the plate material in the upper HU. They may be formed into a cylindrical shape so that they overlap each other, or may be formed into a cylindrical body such that the tip portion of the barrel piece enters the insertion space 30X.

In addition, the wire regulating portion 30 in the above-mentioned electric wire 1 with a connecting fitting is bent so as to have a slight gap between the ends of the rolled plate material in the upper HU, but the ends of the rolled plate material It may be bent so that they come into contact with each other. Further, the ends of the rolled plate material may be formed so as to face each other in any appropriate direction such as the width direction W instead of the upper side HU. Furthermore, the electric wire regulating section 30 is connected to the conductor connecting section 23 only on one side in the width direction W, so that the conductor 11 can be inserted from the other side in the width direction W and the movement toward the upper HU can be restricted. Alternatively, it may be formed into a hook shape when viewed from the longitudinal direction L.

In the above-described electric wire with connecting fitting 1, the wire restricting portion 30 extends toward the base end side LB relative to the conductor connecting portion 23 of the busbar 20, but as shown in Fig. 4(b) , an inclined wire restricting portion 30a may be provided that is inclined relative to the conductor connecting portion 23. A description will be given of an electric wire with connecting fitting 1a in which the inclined wire restricting portion 30a is inclined relative to the conductor connecting portion 23 with reference to Figs. 4 and 5 .
FIG. 4 is a schematic perspective view of an electric wire with a connection fitting 1a which is a modified example of the electric wire with a connection fitting 1, and FIG.

In detail, Fig. 4(a) shows a schematic perspective view of the electric wire with a connecting fitting 1 as viewed from the base end side LB and the upper side HU, Fig. 4(b) shows a schematic perspective view of the electric wire with a connecting fitting 1a as viewed from the base end side LB and the upper side HU, Fig. 5(a) shows a cross-sectional view of the electric wire with a connecting fitting 1 as viewed from the arrows B-B shown in Fig. 2(a), and Fig. 5(b) shows a cross-sectional view of the electric wire with a connecting fitting 1a at the same cross-sectional position.
In the following description of the electric wire with a connector fitting 1a, the same components as those in the electric wire with a connector fitting 1 described above will be given the same reference numerals and the description thereof will be omitted.

Unlike the electric wire with connection fitting 1 in which the electric wire restricting portion 30 connected to the end of the base side LB of the conductor connection portion 23 extends toward the base side LB, the electric wire with connection fitting 1a has an inclined electric wire restricting portion 30a connected to the end of the base side LB of the conductor connection portion 23 inclined downward toward the base side LB to the lower side HD. Other than the inclined electric wire restricting portion 30a being inclined, it has the same configuration as the electric wire restricting portion 30 described above, so its description will be omitted.

The electric wire 1a with a connection fitting in which the inclined electric wire regulating part 30a is in an inclined position is inclined so that the proximal end LB end of the electric wire regulating part 30 in the bus bar 20 is lowered to the lower side HD with the conductor 11 inserted therethrough. The conductor 11 and the conductor connecting portion 23 can be welded together. In addition, in the bus bar 20, before inserting the covered electric wire 10 into the wire regulating part 30, the wire regulating part 30 is inclined with respect to the conductor connecting part 23, and then the covered electric wire 10 is inserted and the conductor 11 is inserted into the conductor connecting part. 23 along the longitudinal direction L and welded to form a welded portion 40 to constitute the electric wire 1a with a connecting fitting.

The electric wire with connecting fitting 1a configured in this manner has the same effect as that of the electric wire with connecting fitting 1 described above. Specifically, the tip of the insulating coating 12 is provided at a predetermined distance from the end of the base end side LB of the inclined electric wire restricting portion 30a. That is, the conductor 11, which has a lower rigidity than the insulated electric wire 10, is arranged in an exposed state between the end of the base end side LB of the inclined electric wire restricting portion 30a and the insulating coating 12. As a result, even if an external force F1 acts on the insulated electric wire 10 toward the upper side HU, the conductor 11 can absorb the external force F1 propagating toward the conductor connection portion 23 through the conductor 11. Therefore, the external force F1 can be suppressed from propagating as a propagating force to the welded portion 40 between the conductor 11 and the conductor connection portion 23.

Furthermore, by arranging the conductor 11 in the inclined electric wire regulating part 30a, the movement of the conductor 11 to the upper side HU where the external force F1 propagating to the welding part 40 connecting the conductor 11 and the conductor connecting part 23 is suppressed is suppressed. It can be regulated by the regulating section 30a. More specifically, even if the propagated force acting on the conductor 11 disposed on the inclined electric wire regulating part 30a moves to the upper HU, the conductor 11 comes into contact with the electric wire regulating part 30, so that the conductor 11 moves to the upper HU. movement is regulated. Therefore, damage to the welded portion 40 between the conductor 11 and the conductor connection portion 23 due to the conductor 11 moving to the upper HU can be suppressed.

Further, in the electric wire 1a with a connecting fitting, the conductor connection portion 23 is planar, and the inclined electric wire regulating portion 30a is in an inclined position in which the base end side LB is inclined toward the lower side HD with respect to the planar conductor connection portion 23. Therefore, as shown in FIG. 5(b), the covered wire 10 extending from the conductor connection portion 23 is bent, reducing the influence of external force acting on the weld portion 40 between the conductor connection portion 23 and the conductor 11. be able to. Thereby, damage to the welded portion 40 between the conductor connection portion 23 and the conductor 11 can be more reliably suppressed.

In addition, the corner of the inner end of the base end LB of the inclined electric wire restricting part 30a, which is the contact point between the end of the base end LB of the inclined electric wire restricting part 30a and the insulated electric wire 10 and serves as the fulcrum, is provided with a chamfered part 30Y that is chamfered to have an arc-shaped cross section. Therefore, even if an external force F1 acts on the insulated electric wire 10 at the base end LB from the inclined electric wire restricting part 30a in a direction different from the longitudinal direction L, and the contact point with the insulated electric wire 10 serves as the fulcrum, the corner of the inclined electric wire restricting part 30a can be prevented from damaging the insulating coating 12 of the insulated electric wire 10. Note that the chamfered part 30Y may be a tapered chamfered part instead of having an arc-shaped cross section.

In addition, in the above description of the electric wire 1a with a connecting fitting, the inclined electric wire regulating part 30a in the electric wire 1a with a connecting fitting was in an inclined posture in which it is inclined downward toward the proximal end side LB to be on the lower side HD. It may be in an inclined position in either direction W, in the upper HU, or in an oblique direction in the height direction H and the width direction W. Furthermore, the inclination direction may be changed at an intermediate portion in the longitudinal direction L of the inclined electric wire regulating portion 30a.

Further, in the above-mentioned electric wire 1 with a connecting fitting, the conductor 11, which is exposed by peeling off the insulation coating 12 by a predetermined length, is inserted into the electric wire regulating part 30 at the tip side LF of the covered electric wire 10, and the conductor 11 is Although the tip portion is connected to the conductor connecting portion 23, the shock absorbing material 50 may be attached to the conductor 11 passing through the wire regulating portion 30. Hereinafter, the electric wire 1b with a connecting fitting, in which the conductor 11 with the cushioning material 50 attached to the electric wire regulating part 30 is inserted, will be explained based on FIG.

Fig. 6 is an explanatory diagram of the electric wire with a connecting fitting 1b. More specifically, Fig. 6(a) shows a schematic perspective view of the electric wire with a connecting fitting 1b from the tip side LF and the upper side HU, and Fig. 6(b) shows a schematic cross-sectional view corresponding to the A-A arrow view shown in Fig. 2(a).
In the following description of the electric wire with a connector fitting 1b, the same components as those in the above-described electric wire with a connector fitting 1 are denoted by the same reference numerals and description thereof will be omitted.

The electric wire with connection fitting 1b differs from the electric wire with connection fitting 1 described above in that the conductor 11 of the coated electric wire 10 is inserted into the insertion space 30X of the electric wire restricting part 30, in that the conductor 11 is attached with a cushioning material 50 and inserted into the insertion space 30X of the electric wire restricting part 30.

The cushioning material 50 is made of a material with suitable cushioning properties, such as sponge, rubber, or fabric, and is formed into a cylindrical shape with an outer diameter slightly smaller than the inner surface of the electric wire regulation part 30 and a length longer than the longitudinal direction L of the electric wire regulation part 30.

By attaching the above-described buffer material 50 to the conductor 11 and inserting it into the insertion space 30X of the wire regulating section 30, the conductor 11, which has a smaller diameter than the outer diameter of the covered wire 10, and the inner surface of the wire regulating section 30 can be separated. You can fill in the gaps. Note that there is a gap between the outer circumferential surface of the buffer material 50 disposed on the wire regulating section 30 and the inner circumferential surface of the electric wire regulating section 30 . Further, the distal end of the insulating coating 12 is arranged at a predetermined distance from the end of the cushioning material 50 on the proximal side LB.

The electric wire 1b with a connecting fitting configured in this manner has the same effect as the above-mentioned electric wire 1 with a connecting fitting. Specifically, since the tip of the insulation coating 12 is provided at a predetermined distance from the end of the base end LB of the wire regulating section 30, the conductor 11 has lower rigidity than the covered wire 10. is arranged in an exposed state between the end of the base end side LB of the electric wire regulating part 30 and the insulation coating 12. Thereby, even if the external force F1 acts on the covered wire 10 in a direction toward the HU, the conductor 11 can absorb the propagation force that propagates toward the conductor connection portion 23 via the conductor 11. Therefore, it is possible to suppress the external force F1 from propagating to the welded portion 40 between the conductor 11 and the conductor connection portion 23.

Furthermore, the movement of the conductor 11 toward the upper side HU, where the external force F1 propagating to the welded portion 40 connecting the conductor 11 and the conductor connection portion 23 is suppressed, can be restricted by the frame-shaped insertion restriction portion 30c. More specifically, even if the propagated force acting on the conductor 11 disposed in the frame-shaped insertion restriction part 30c moves to the upper HU, the conductor 11 comes into contact with the frame-shaped insertion restriction part 30c. Movement to the upper HU is further restricted. Therefore, damage to the welded portion 40 between the conductor 11 and the conductor connection portion 23 due to the conductor 11 moving to the upper HU can be suppressed.

In addition, by disposing the buffer material 50 between the electric wire restricting portion 30 and the conductor 11 arranged in the electric wire restricting portion 30, the conductor 11 can be prevented from directly contacting the electric wire restricting portion 30. Therefore, the conductor 11 can be prevented from being damaged by contact with the electric wire restricting portion 30, and stable conductivity between the conductor 11 and the conductor connection portion 23 can be ensured.

Furthermore, since the buffer material 50 is disposed between the wire regulating section 30 and the covered wire 10 inserted through the wire regulating section 30, when converting the external force F1 acting on the covered wire 10 into the external force F2, In addition, it is possible to prevent the covered wire 10 from being damaged due to contact with the wire regulating portion 30 via the cushioning material 50.

Second Embodiment
Next, a connection fitting-attached electric wire 1c according to a second embodiment will be described with reference to Figs.

7 and 8 show explanatory diagrams of the electric wire 1c with a connecting fitting according to the second embodiment, and FIG. 9 shows an explanatory diagram about a method of manufacturing the electric wire 1c with a connecting fitting according to the second embodiment.
To be more specific, FIG. 7(a) shows a schematic perspective view of the electric wire 1c with a connecting fitting as seen from the tip side LF and upper side HU, and FIG. 7(b) shows a schematic perspective view as seen from the AA arrow shown in FIG. A sectional view is shown, and FIG. 7(c) is an enlarged schematic perspective view of section a in FIG. 7(a). FIG. 8(a) shows a plan view of the electric wire 1c with a connecting fitting, and FIG. 8(b) shows a sectional view taken along the line BB shown in FIG. 8(a).

FIG. 9(a) shows a schematic perspective view before placing the covered electric wire 10 on the bus bar 20c, and FIG. 9(b) shows a schematic perspective view of the covered electric wire 10 placed on the frame-shaped insertion restriction portion 30c of the bus bar 20c. A perspective view is shown. Here, FIG. 9 shows a schematic perspective view of the electric wire 1c with a connecting fitting as seen from the tip side LF and the upper side HU.
In addition, in the following description of the electric wire 1c with a connecting fitting, the same structure as the electric wire 1 with a connecting fitting of the above-described embodiment is given the same reference numeral, and the explanation thereof will be omitted.

In the above description of the electric wire with connecting fitting 1, the insulated electric wire 10 is inserted into the cylindrical electric wire restricting portion 30, but the electric wire with connecting fitting 1c has a frame-shaped insertion restricting portion 30c formed in a frame shape, through which the insulated electric wire 10 is inserted, as described below.

To explain in detail, the configurations of the connecting portion 21, intermediate portion 22, and conductor connecting portion 23 in the bus bar 20c having the frame-shaped insertion restriction portion 30c are the same as those of the bus bar 20 described above.
The frame-shaped insertion restriction portion 30c extending from the end of the proximal side LB of the conductor connection portion 23 of the bus bar 20c to the upper side HU is arranged at a predetermined interval from the upper surface of the conductor connection portion 23 to the upper side HU, and has a width The separating direction regulating part 34 extends in the direction W, and a pair of legs 35 extend from both sides of the separating direction regulating part 34 in the width direction W to the lower side HD, forming a gate shape.

A frame-shaped insertion restriction portion 30c formed in a gate shape by the separation direction restriction portion 34 and a pair of legs 35 is provided so as to protrude from the end of the base end side LB of the conductor connection portion 23 toward the upper side HU. The conductor 11 of the covered wire 10 is configured to be able to be inserted into an internal opening 30Xc surrounded by the separation direction regulating part 34 and the pair of legs 35.

Note that the frame-shaped insertion restriction portion 30c is integrally formed from the end portion of the base end side LB of the conductor connection portion 23 toward the base end side LB, and is formed by being bent toward the upper side HU. Therefore, the frame-shaped insertion regulating portion 30c is formed to have the same thickness in the longitudinal direction L as the thickness in the height direction H of the bus bar 20c.

The covered electric wire 10 inserted into the internal opening 30 Movement in the direction W can be restricted by the legs 35.

Next, the electric wire with connection fitting 1c formed by connecting the covered electric wire 10 to the bus bar 20c is manufactured by the manufacturing method shown in FIG.
Specifically, as shown in FIG. 9( a), at the tip of the insulated electric wire 10, the insulating coating 12 that is longer than the sum of the length of the conductor 11 arranged along the longitudinal direction L at least at the desired position of the conductor connection portion 23 and the thickness in the height direction H of the bus bar 20c is peeled off to expose the conductor 11.

In this way, the covered electric wire 10 with the conductor 11 exposed at the tip is arranged on the base end side LB of the frame-shaped insertion restriction portion 30c. Then, as shown in FIG. 9(b), the covered wire 10 is inserted into the frame-shaped insertion restriction part 30c from the base end side LB, and the conductor 11 is arranged along the longitudinal direction L in the conductor connection part 23. (See FIG. 9(b)).
Thereafter, the conductor 11 disposed along the longitudinal direction L in the conductor connecting portion 23 and the conductor connecting portion 23 are welded in the longitudinal direction L to form a welded portion 40, and the electric wire 1c with a connecting fitting is completed.

The electric wire with connecting fitting 1c configured in this manner has the same effect as that of the electric wire with connecting fitting 1 described above. Specifically, since the tip of the insulating coating 12 is provided at a predetermined distance from the end of the base end side LB of the frame-shaped insertion restriction portion 30c, the conductor 11, which has a lower rigidity than the coated electric wire 10, is arranged in an exposed state between the end of the base end side LB of the frame-shaped insertion restriction portion 30c and the insulating coating 12. As a result, even if an external force F1 acts on the coated electric wire 10 toward the upper side HU, the conductor 11 can absorb the propagating force propagating toward the conductor connection portion 23 via the conductor 11. Therefore, the external force F1 can be prevented from propagating to the welded portion 40 between the conductor 11 and the conductor connection portion 23.

Furthermore, the movement of the conductor 11 to the upper HU, in which the propagation force propagating to the welded portion 40 connecting the conductor 11 and the conductor connection portion 23 is suppressed, can be restricted by the frame-shaped insertion restriction portion 30c. More specifically, even if the propagation force propagating to the conductor 11 arranged in the frame-shaped insertion restriction portion 30c acts on the conductor 11 and moves it to the upper HU, the conductor 11 comes into contact with the frame-shaped insertion restriction portion 30c, and the movement of the conductor 11 to the upper HU is restricted. Therefore, the movement of the conductor 11 to the upper HU and damage to the welded portion 40 between the conductor 11 and the conductor connection portion 23 can be restricted.

Further, in the electric wire 1c with a connecting fitting, the conductor connecting part 23 has a planar part, and the frame-shaped insertion regulating part 30c is provided at the end of the proximal side LB of the conductor connecting part 23, and the conductor 11 is connected A frame is formed by a separating direction regulating part 34 that regulates the movement of the conductor 11 from the flat planar part to the upper HU, and a pair of leg parts 35 that regulates the movement of the covered wire 10 in the cross direction that intersects with the upper HU. The conductor connection portion 23 is formed in a shape and protrudes from the planar portion of the conductor connection portion 23 toward the upper side HU.

As a result, the conductor 11 can be easily inserted into the frame-shaped insertion restriction portion 30c, and the conductor 11 can not only be moved toward the upper side HU in the frame-shaped insertion restriction portion 30c, but also in the direction intersecting the upper side HU and the base end side LB ( Movement in the width direction W) can also be restricted. Thereby, it is possible to easily and reliably suppress damage to the welded portion 40 that connects the conductor 11 and the conductor connecting portion 23.

In addition, the conductor connection part 23 is provided at the end of the base end side LB, and is formed in a gate shape with a separation direction restricting part 34 that restricts the movement of the conductor 11 from the planar part to the upper side HU to the planar part to which the conductor 11 is connected, and a pair of legs 35 that restrict the movement of the conductor 11 in the width direction W. The insulated electric wire 10 with the conductor 11 exposed at the tip side LF is inserted into the frame-shaped insertion restricting part 30c that protrudes from the planar part toward the conductor connection part 23, and the conductor 11 is arranged along the longitudinal direction L relative to the conductor connection part 23 on the planar part, and the conductor 11 arranged along the longitudinal direction L is welded to the conductor connection part 23. Therefore, the conductor 11 that can absorb the external force F1 propagating toward the conductor connection part 23 can be easily inserted into the frame-shaped insertion restricting part 30c, and the manufacturability of the electric wire with connection fitting 1c can be improved.

In addition, the wire with connection fitting 1c is completed by inserting the insulated electric wire 10 through the frame-shaped insertion restriction portion 30c and welding the conductor 11 to the conductor connection portion 23 to form the welded portion 40, so the busbar 20 is not deformed after the conductor 11 is welded to the conductor connection portion 23. As a result, no stress due to deformation is generated in the welded portion 40 connecting the conductor 11 and the conductor connection portion 23, and the connection state of the welded portion 40 connecting the conductor connection portion 23 and the insulated electric wire 10 can be stabilized.

In addition, a chamfered portion 30Y may be provided at the corners on the inner surface side of the base end side LB of the frame-shaped insertion restriction portion 30c of the electric wire with connection fitting 1c. By providing a chamfered portion 30Y at the corners on the inner surface side of the base end side LB of the frame-shaped insertion restriction portion 30c, the same effect as that achieved by providing a chamfered portion 30Y on the electric wire restriction portion 30 of the electric wire with connection fitting 1 described above can be achieved.

In addition, in the electric wire with connecting fitting 1c, the frame-shaped insertion restriction portion 30c protrudes toward the upper side HU, but this frame-shaped insertion restriction portion 30c may be inclined toward the tip side LF or the base side LB. In this way, by having the separation direction restriction portion 34 inclined toward either the tip side LF or the base side LB, a bend is generated in the conductor 11 extending from the conductor connection portion 23, and the effect of the propagation force acting on the welded portion 40 between the conductor connection portion 23 and the conductor 11 can be reduced.

Third Embodiment
Next, a connection fitting-attached electric wire 1d according to a third embodiment will be described with reference to Figs.

10 and 11 show explanatory diagrams of an electric wire 1d with a connecting fitting according to the third embodiment, and FIG. 12 shows an explanatory diagram of a method for manufacturing the electric wire 1d with a connecting fitting according to the third embodiment.
To be more specific, FIG. 10(a) shows a schematic perspective view of the electric wire with a connecting fitting 1d viewed from the tip side LF and upper side HU, and FIG. 10(b) shows a schematic perspective view as seen from the AA arrow shown in FIG. 11(a). A cross-sectional view is shown. FIG. 11(a) shows a plan view of the electric wire 1d with a connecting fitting, and FIG. 11(b) shows a sectional view taken along the line BB shown in FIG. 11(a).

Fig. 12(a) is a schematic perspective view of the busbar 20d before the insulated electric wire 10 is arranged thereon, Fig. 12(b) is a schematic perspective view of the busbar 20d after the insulated electric wire 10 is arranged in the extended insertion restricting portion 30d, and Fig. 12(c) is a schematic perspective view of the extended insertion restricting portion 30d after the insulated electric wire 10 is arranged therein and tilted. Here, Fig. 12 shows a schematic perspective view of the connection fitting-attached electric wire 1d as viewed from the tip side LF and the upper side HU.
In the following description of the electric wire with connection fitting 1d, the same components as those in the electric wire with connection fitting 1 to 1c of the above-described embodiment are denoted by the same reference numerals and description thereof will be omitted.

In the above description of the electric wire with connecting fitting 1c, the conductor 11 is inserted through the internal opening 30Xc of the gate-shaped frame-shaped insertion restriction portion 30c, but in the electric wire with connecting fitting 1d, as will be described later, the conductor 11 is inserted through the internal opening 30Xd of the extended insertion restriction portion 30d formed in a frame shape.
More specifically, the configurations of the connection portion 21, the intermediate portion 22 and the conductor connection portion 23 of the bus bar 20d having the extended insertion restriction portion 30d are the same as those of the bus bar 20 described above.

Unlike the bus bar 20c, which has a frame-shaped insertion restriction portion 30c that protrudes from the end of the base side LB of the conductor connection portion 23 toward the upper side HU, the bus bar 20d of the electric wire with connection fitting 1d has a separation direction restriction portion that extends in the width direction W. 37 and a pair of legs 38 extending from both sides of the width direction W of the separation direction regulating part 34 to the lower HD side, the gate-shaped part 36 is arranged at a predetermined distance from the end of the proximal side LB of the conductor connecting part 23. The lower HD end of the leg portion 38 and the proximal end LB end of the conductor connecting portion 23 are connected by a pair of connecting portions 39. Further, the gate-shaped portion 36 connected to the proximal end LB of the conductor connecting portion 23 by the connecting portion 39 is in a forward-inclined posture in which the upper side HU is inclined toward the distal end side LF.

The electric wire with connection fitting 1d configured by connecting the covered electric wire 10 to the bus bar 20d configured in this manner is manufactured by the manufacturing method shown in FIG.
Specifically, as shown in FIG. 12(a), at the tip of the insulated electric wire 10, the insulating coating 12 that is longer than the sum of the length of the conductor 11 arranged along the longitudinal direction L at least at the desired position of the conductor connection portion 23 and the thickness in the height direction H of the bus bar 20c is peeled off to expose the conductor 11.

In this way, the coated electric wire 10 with the conductor 11 exposed at the tip is placed on the base end side LB of the extended insertion restriction portion 30d. Then, as shown in FIG. 12(b), the conductor 11 is inserted into the extended insertion restriction portion 30d from the base end side LB, and the tip portion of the conductor 11 is placed along the longitudinal direction L in the conductor connection portion 23.

Thereafter, as shown in FIG. 12(c), the tip of the conductor 11 is tilted so that the upper side HU of the gate-shaped portion 36 becomes the tip side LF, and the tip of the conductor 11 is arranged along the longitudinal direction L in the conductor connection portion 23. The welded portion 40 is formed by welding the portion and the conductor connecting portion 23 in the longitudinal direction L, and the electric wire 1d with the connecting fitting is completed.

The electric wire 1d with a connecting fitting configured in this manner has the same effect as the above-mentioned electric wire 1c with a connecting fitting. Specifically, the tip of the insulating coating 12 is connected to the end of the proximal side LB of the extending insertion restriction portion 30d extending from the end of the proximal side LB of the conductor connecting portion 23 to the proximal side LB. Because they are provided at a predetermined interval, the conductor 11, which has lower rigidity than the covered wire 10, is exposed between the end of the proximal side LB of the extension insertion restriction portion 30d and the insulation sheath 12. Placed. Thereby, even if the external force F1 acts on the covered wire 10 toward the upper HU, the conductor 11 can absorb the external force F1 propagating toward the conductor connection portion 23 via the conductor 11. Therefore, it is possible to suppress the external force F1 from propagating to the welded portion 40 between the conductor 11 and the conductor connection portion 23.

Furthermore, the movement of the conductor 11 to the upper HU, in which the external force F1 propagating to the welded portion 40 connecting the conductor 11 and the conductor connection portion 23 is suppressed, can be restricted by the extension insertion restricting portion 30d. More specifically, even if the propagating force propagating to the conductor 11 arranged in the extension insertion restricting portion 30d acts on the conductor 11 and moves it to the upper HU, the conductor 11 comes into contact with the extension insertion restricting portion 30d, so that the movement of the conductor 11 to the upper HU is further restricted. Therefore, the movement of the conductor 11 to the upper HU and the damage to the welded portion 40 between the conductor 11 and the conductor connection portion 23 can be restricted.

In the electric wire with connecting fitting 1d, the conductor connection part 23 has a planar part, and the extended insertion restriction part 30d is provided at the end of the base end side LB of the conductor connection part 23, and is formed in a frame shape with a separation direction restriction part 37 that restricts the movement of the conductor 11 from the planar part to which the conductor 11 is connected to the upper HU, and a pair of legs 38 that restrict the movement of the coated electric wire 10 in the cross direction that crosses the upper HU, and is composed of a gate-shaped part 36 that protrudes from the planar part. This gate-shaped part 36 is disposed at a predetermined distance from the end of the conductor connection part 23 to the base end side LB, and is provided with connecting parts 39 that connect each of the legs 38 to the end of the conductor connection part 23.

This allows the conductor 11 to be reliably exposed between the end of the base end side LB of the extended insertion restriction portion 30d and the tip of the insulating coating 12, and allows the length of the exposed conductor 11 to be a predetermined length or longer. Therefore, the propagation force propagated by the exposed conductor 11 can be absorbed, and the propagation of the external force F1 to the welded portion 40 between the conductor 11 and the conductor connection portion 23 can be suppressed.

Further, the conductor 11 can be easily inserted into the extending insertion restriction portion 30d, and the conductor 11 can not only be moved toward the upper side HU in the extension insertion restriction portion 30d, but also in the direction (width Movement in direction W) can also be restricted. Thereby, it is possible to easily and reliably suppress damage to the welded portion 40 that connects the conductor 11 and the conductor connecting portion 23.

Furthermore, since the gate-shaped portion 36 connected to the end of the conductor connection portion 23 by the connecting portion 39 is inclined toward the tip side LF, as shown in FIG. 11(b), a bend occurs in the insulated electric wire 10 extending from the conductor connection portion 23, and the effect of the propagation force acting on the welded portion 40 between the conductor connection portion 23 and the conductor 11 can be reduced.

Note that the gate-shaped portion 36 constituting the extension insertion restriction portion 30d is spaced apart from the proximal end LB of the conductor connection portion 23, and the leg portion 38 of the gate-shaped portion 36 is connected to the connecting portion 39. Since it is connected to the conductor connection portion 23, the bending that occurs in the covered electric wire 10 becomes gentle, and the load on the covered electric wire 10 can be reduced.

Furthermore, a chamfered portion 30Y may be provided at a corner on the inner surface side of the tip side LF of the extended insertion restriction portion 30d of the electric wire with connection fitting 1d. By providing a chamfered portion 30Y at a corner on the inner surface side of the base end side LB of the extended insertion restriction portion 30d, the same effect as that achieved by providing a chamfered portion 30Y at the electric wire restriction portion 30 of the electric wire with connection fitting 1 described above can be achieved.

In the electric wire with connecting fitting 1d, the extended insertion restriction portion 30d is inclined toward the tip side LF, but the same effect can be achieved by inclining this frame-shaped insertion restriction portion 30c toward the base side LB. Also, even if the extended insertion restriction portion 30d is not inclined toward the tip side LF or base side LB and protrudes to the upper side HU, the same effect can be achieved as with the electric wire with connecting fitting 1c.

Furthermore, in the electric wire with connecting fitting 1d, the extended insertion restriction portion 30d is inclined toward the tip side LF so as not to come into contact with the conductor 11, but the extended insertion restriction portion 30d may be inclined toward the tip side LF so that the conductor 11 is clamped between the conductor connection portion 23 and the separation direction restriction portion 34. This allows the conductor 11 to be crimped between the conductor connection portion 23 and the separation direction restriction portion 34, so that the external force F1 reduced by the conductor 11 between the tip of the insulating coating 12 and the extended insertion restriction portion 30d can be reliably prevented from being transmitted to the welded portion 40, which is the connection point between the conductor 11 and the conductor connection portion 23. Therefore, the welded portion 40 between the conductor 11 and the conductor connection portion 23 can be reliably prevented from being damaged.

In addition, in the manufacturing method of the electric wire with connecting fitting 1d, the conductor connection part 23 has a planar portion, and the extension insertion restriction part 30d is provided at the end of the conductor connection part 23 on the side where the insulated electric wire 10 extends, and is formed in a frame shape with a separation direction restriction part 37 that restricts the movement of the insulated electric wire 10 of the upper HU from the planar part to which the conductor 11 is connected, and a pair of legs 38 that restrict the movement of the insulated electric wire 10 in the direction crossing the separation direction (width direction W), and is a gate-shaped part 36 that protrudes from the planar part. After the exposed conductor 11 is placed in the wire restriction part 30 and the tip of the conductor 11 is placed at a predetermined position in the conductor connection part 23, the gate-shaped part 36 is inclined toward the side where the conductor connection part 23 is placed (tip side LF), and the conductor 11 is connected to the conductor connection part 23.

This makes it possible to manufacture an electric wire with a connection fitting 1d that has stable conductivity between the coated electric wire 10 and the bus bar 20d and that can suppress damage to the welded portion 40 between the conductor 11 and the bus bar 20d.
More specifically, even if an unintended external force acts on the insulated electric wire 10 in the process of tilting the gate-shaped portion 36 in which the conductor 11 is arranged, the conductor 11 is not connected to the conductor connection portion 23, and therefore there is no effect on the welded portion 40 between the conductor connection portion 23. In other words, the electric wire with connection fitting 1 can be manufactured without having to worry about deformation of the welded portion 40 between the conductor 11 and the conductor connection portion 23, thereby improving work efficiency.

In addition, since the conductor 11 and the conductor connection portion 23 are connected after the frame-shaped body is tilted, no external force acts in an unintended direction after connection, and electrical conductivity can be reliably established between the insulated electric wire 10 and the bus bar 20d. This makes it possible to manufacture an electric wire with a connection fitting 1 that has stable electrical conductivity between the insulated electric wire 10 and the bus bar 20d and can suppress damage to the welded portion 40 between the conductor 11 and the bus bar 20d. In addition, by tilting the gate-shaped portion 36 (extended insertion restriction portion 30d), the location where the conductor 11 is placed (i.e., the internal opening 30Xd) can be narrowed, so that the position of the conductor 11 can be restricted as a preliminary step to connecting the conductor 11 and the conductor connection portion 23.

In the configuration of the present invention and the correspondence with the above-mentioned embodiment,
The conductor of the present invention corresponds to conductor 11,
Similarly,
The insulating coating corresponds to the insulating coating 12.
The tip side corresponds to the tip side LF,
The coated electric wire corresponds to the coated electric wire 10,
The connecting fitting corresponds to the bus bar 20,
The connection portion corresponds to the connection portion 21,
The conductor connection portion corresponds to the conductor connection portion 23,
The extension direction corresponds to the base end side LB,
The separation direction corresponds to the upper HU,
The electric wire restricting portion corresponds to the electric wire restricting portion 30, the inclined electric wire restricting portion 30a, the frame-shaped insertion restricting portion 30c, and the extended insertion restricting portion 30d.
The electric wires with connection fittings correspond to the electric wires with connection fittings 1, 1a, 1b, 1c, and 1d,
The chamfered portion corresponds to the chamfered portion 30Y,
The cushioning material corresponds to the cushioning material 50,
The opposite direction to the separation direction corresponds to the lower HD,
The separation direction regulating portion corresponds to the separation direction regulating portion 34 and the separation direction regulating portion 37.
The legs correspond to legs 35 and 38,
The frame-shaped body corresponds to the gate-shaped portion 36,
The connecting portion corresponds to the connecting portion 39,
The opposite direction to the extending direction corresponds to the base end side LB, but the present invention is not limited to the configurations of the above-mentioned embodiments, and many embodiments can be obtained.

For example, although the conductor 11 is arranged along the longitudinal direction L with respect to the conductor connection portion 23, it may be arranged along the width direction W or the diagonal direction.
In addition, although the above-described bus bar 20 is formed in a step-like manner by arranging the connecting portion 21, the intermediate portion 22, and the conductor connecting portion 23 in this order, for example, the bus bar 20 may be configured with an electrode terminal constituting a positive electrode or a negative electrode, and may be connected to the case. A battery module may be constructed by arranging a plurality of them. In that case, two connecting portions 21 and an intermediate portion 22 may be provided for the conductor connecting portion 23 to form a bifurcated bus bar. Furthermore, instead of the plate-shaped bus bar 20, the connecting terminal may be provided with a wire regulating part 30, an inclined wire regulating part 30a, a frame-shaped insertion regulating part 30c, and an extending insertion regulating part 30d, and the covered electric wire 10 may be connected to the connecting terminal. .

In addition, although the conductor 11 is welded to the conductor connection part 23 to form the weld part 40 and connected, the conductor 11 is connected to the conductor connection part 23 in a conductive manner by adhesion with a conductive adhesive or caulking. may be integrated.
Further, although the conductor 11 is connected to the upper HU surface of the conductor connecting portion 23, the conductor 11 may be connected to the lower HD surface of the conductor connecting portion 23.

DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c, 1d... Electric wire with connecting fitting 10... Insulated electric wire 11... Conductor 12... Insulating coating 20, 20c, 20d... Bus bar 21... Connection portion 23... Conductor connection portion 30... Electric wire restricting portion 34... Separation direction restricting portion 35... Leg portion 36... Gate-shaped portion 37... Separation direction restricting portion 38... Leg portion 39... Connection portion 50... Cushioning material 30Y... Chamfered portion LB... Base end side LF... Tip side HD... Lower side HU... Upper side

Claims (12)

a coated electric wire in which a conductor is coated with an insulating coating and a predetermined range of the insulating coating is stripped from a tip side to expose the conductor;
and a connecting fitting to which the exposed conductor is connected,
The connecting fitting is provided with a connecting portion to be connected to a connection object and a conductor connecting portion to be connected to the conductor,
a direction in which the insulated electric wire extends from the conductor connection portion to which the conductor is connected is defined as an extension direction, and a direction in which the conductor connected to the conductor connection portion moves away from the conductor connection portion is defined as a separation direction,
the exposed conductor is disposed in the extending direction of the conductor connection portion, and a wire restricting portion is provided to restrict movement of the conductor in the separating direction,
An electric wire with a connecting fitting, in which a tip of the insulating coating of the insulated electric wire is positioned in the extending direction further than ends in the extending direction of the conductor connecting portion and the wire regulating portion. The electric wire with a connecting fitting according to claim 1, wherein the electric wire regulating portion projects from an end portion in the extending direction toward the extending direction. The electric wire with a connecting fitting according to claim 1 or 2, wherein chamfered portions are provided at corners of the electric wire regulating portion in the extending direction and the separating direction. The electric wire with a connection fitting according to claim 1 or 2, further comprising a buffer material disposed between the electric wire restricting portion and the conductor disposed in the electric wire restricting portion. The wire regulating portion is
3. The electric wire with a connection fitting according to claim 1, wherein the electric wire is formed in a generally tubular shape having a predetermined length in the extending direction. The conductor connection portion has a planar portion,
The electric wire with a connection fitting according to claim 1 or 2, wherein the electric wire restricting portion is inclined relative to the planar portion in the separating direction or in a direction opposite to the separating direction. The conductor connection portion has a planar portion,
The wire regulating portion is
provided at an end of the conductor connection portion in the extending direction,
2. The electric wire with connecting fitting as described in claim 1, which is formed in a frame shape with a separation control portion that controls the movement of the conductor in the separation direction from the planar portion to which the conductor is connected, and a pair of leg portions that control the movement of the insulated electric wire in a cross direction that crosses the separation direction, and is a frame-shaped body that protrudes from the planar portion. The conductor connection portion has a planar portion,
The wire regulating portion is
a separation restriction portion that restricts movement of the conductor in the separation direction and a pair of legs that restrict movement of the insulated electric wire in a direction intersecting the separation direction, the frame-shaped body being formed in a frame shape and protruding from the planar portion,
the frame-shaped body is disposed at a predetermined interval from an end of the conductor connection portion in the extending direction,
The electric wire with a connection fitting according to claim 2 , further comprising a connecting portion for connecting each of the leg portions to an end of the conductor connecting portion. The electric wire with a connecting fitting according to claim 7 or 8, wherein the frame-like body is in an inclined position inclining in the extending direction or in a direction opposite to the extending direction. The electric wire with a connecting fitting according to claim 1, wherein the conductor inserted through the electric wire regulating part is crimped to the electric wire regulating part. A method for manufacturing an electric wire with a connecting fitting, in which a predetermined range of the insulating coating is peeled off from the tip side of a covered electric wire that covers a conductor with an insulating coating, and the exposed conductor is connected to a connecting fitting,
The connection fitting is provided with a connection part to be connected to a connection target and a conductor connection part to be connected to the conductor,
A side of the conductor connection portion to which the conductor is connected, on which the covered wire extends, is defined as an extension direction, and a side of the conductor connected to the conductor connection portion, where the conductor is separated from the conductor connection portion, is defined as a separation direction;
The conductor extending in the extending direction is disposed in the extending direction of the conductor connecting portion, and a wire regulating portion that regulates movement of the conductor in the separating direction is provided,
Peel off the insulating coating at the tip of the covered electric wire so that the conductor is exposed for a length longer than a length from the connection point between the conductor and the conductor connection part to the end of the conductor connection part in the extending direction. ,
arranging the exposed conductor in the wire regulating section, and arranging the tip of the conductor at a predetermined position in the conductor connecting section;
A method of manufacturing an electric wire with a connecting fitting that connects the conductor to the conductor connection portion. The conductor connection portion has a planar portion,
The electric wire regulation department is
provided at the end of the conductor connection part on the side where the covered electric wire extends,
a separation regulating part that regulates movement of the covered electric wire in the separating direction from the planar portion to which the conductor is connected; and a pair of legs that restricts movement of the covered electric wire in a direction crossing the separating direction. a frame-shaped body that is formed into a frame shape and protrudes from the planar part;
After arranging the exposed conductor in the wire regulating part and arranging the tip of the conductor at a predetermined position in the conductor connection part, the frame-shaped body is moved toward the side where the conductor connection part is arranged. and tilt it
The method for manufacturing an electric wire with a connecting fitting according to claim 11, wherein the conductor is connected to the conductor connecting portion.

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