JP5500384B2 - Electric wire with terminal fitting and method of manufacturing electric wire with terminal fitting - Google Patents

Description

  The present invention relates to an electric wire with a terminal fitting and a method for manufacturing an electric wire with a terminal fitting.

  2. Description of the Related Art Conventionally, in an electric wire with a terminal metal fitting in which a terminal metal fitting is connected to an end of the electric wire, a technique for waterproofing by covering a connection portion between the terminal metal fitting and the electric wire with a waterproof coating such as a heat-shrinkable tube is known. For example, in the thing of patent document 1, a terminal metal fitting has a connection part connected to another electrically-conductive member, a wire barrel crimped | bonded to the core wire of an electric wire, and a connection part which connects a wire barrel and a connection part. And the wire barrel is crimped | bonded to the core wire exposed from the terminal of insulation coating in the terminal part of an electric wire. And the heat contraction tube is covered in the range from the connection part of a terminal metal fitting to the terminal part of the insulation coating of an electric wire so that the whole exposed core wire may be covered.

JP 2000-259883 A

  However, in the electric wire with terminal fitting, the outer shape of the crimping portion and the connecting portion of the terminal fitting is greatly different. Specifically, the crimping portion has a columnar shape, whereas the joining portion has a flat plate shape. Therefore, it was difficult to sufficiently adhere the heat shrinkable tube to the connecting portion. Insufficient adhesion between the heat-shrinkable tube and the connecting portion can cause water to penetrate into the heat-shrinkable tube and cause this water to reach the contact portion between the core wire and the wire barrel. A device to increase the demand was desired.

  This invention is completed based on the above situations, Comprising: It aims at providing the manufacturing method of the electric wire with a terminal metal fitting and the electric wire with a terminal metal fitting which can improve waterproofness.

  The electric wire with terminal metal fittings of the present invention is an electric wire with terminal metal fittings in which the terminal metal fittings are connected to the ends of electric wires whose outer periphery is covered with an insulating coating, and the terminal metal fittings are connected to other conductive members. A connecting portion, a wire barrel that is crimped to the core wire exposed from the end of the insulating coating at the end portion of the electric wire, and a connecting portion that connects the wire barrel and the connecting portion, from the connecting portion The insulating coating has a shape that covers up to the end of the insulating coating, and is provided with a waterproof coating provided with an adhesive layer on the inner side thereof, and a pressing unit that presses one end of the waterproof coating against the connecting portion side. The one end portion of the waterproof coating is pressed against the connecting portion side by the pressing portion, and the adhesive layer is in close contact with the connecting portion. According to such a structure, since the one end part of a water stop coating | cover can fully be closely_contact | adhered with respect to a connection part, waterproofness can be improved.

In addition, a bottom plate on which the terminal portion of the electric wire is placed on one surface side extends from the connecting portion to the wire barrel, and the pressing portion is formed integrally with the terminal fitting, It is good also as what is arrange | positioned facing one surface of a baseplate. According to such a configuration, it is possible to prevent an increase in the number of parts compared to the case of using a separate part having a pressing part.
Moreover, the said holding | suppressing part is good also as what bent up from the said connection part to the one surface side of the said baseplate, and the side facing the one surface of the said baseplate.

  Further, the pressing portion may be provided with an abutting portion capable of abutting the edge of the water blocking coating. According to such a configuration, the water stop covering can be positioned by abutting the edge of the water stop cover against the abutting portion, and therefore, it is not necessary to separately provide other positioning means.

  In addition, a bottom plate on which the end portion of the electric wire is placed on one surface side extends from the connecting portion to the wire barrel, and the connecting portion extends from the bottom plate and both side edges of the bottom plate to the one surface side. It is good also as what has a pair of side plate which stands | starts up. According to such a configuration, since the connecting portion has a certain depth from the rising edge of the pair of side plates to the bottom plate, the one end portion of the waterproof coating is sufficiently adhered to the connecting portion. For this, the present invention is particularly effective.

Moreover, the said water stop coating | cover is good also as what consists of a heat contraction tube.
The adhesive layer may be made of a thermoplastic adhesive.
Further, the core wire and the terminal fitting may be formed of different kinds of metals. As described above, when the core wire of the electric wire and the terminal fitting are made of different kinds of metals, if moisture intervenes in the connection portion between the two, the two metals dissolve as ions in the water, and corrosion occurs due to electrochemical reaction. There is a risk of progressive electric corrosion. Therefore, since it is important to reliably waterproof the connection portion between the electric wire and the terminal fitting, the present invention is particularly effective.
Further, the electric wire may be an aluminum electric wire provided with a core wire made of aluminum or aluminum alloy. According to such a structure, the weight reduction of an electric wire with a terminal metal fitting can be achieved.

The method for producing an electric wire with a terminal metal fitting of the present invention is an electric wire manufacturing method with a terminal metal fitting for producing an electric wire with a terminal metal fitting in which the terminal metal fitting is connected to an end of an electric wire whose outer periphery is covered with an insulating coating. The terminal fitting is connected to another conductive member, a wire barrel crimped to the core wire exposed from the end of the insulating coating at the end of the electric wire, the wire barrel, and the connection And a water stop coating provided with an adhesive layer made of a thermoplastic adhesive on the inside thereof, and a shape that covers from the joint to the terminal of the insulating coating, And a pressing portion that presses one end portion of the water blocking coating against the connecting portion side, and performs a pressing step of pressing the one end portion of the water blocking coating against the connecting portion side with the pressing portion.
According to such a method, since the one end part of a water stop coating | cover can fully be stuck with respect to a connection part, waterproofness can be improved. In addition, since the pressing process is a simple operation of pressing one end portion of the water-stop coating to the connecting portion side by the pressing portion, the time required for manufacturing is the time required for manufacturing the conventional electric wire with terminal fittings. It can be suppressed to the same extent.

Further, the water-stop coating is made of a heat-shrinkable tube, and after the pressing step, the water-stop coating is heated and contracted, and a heating step is performed to bring the adhesive layer into close contact with the joint portion. Also good.
According to such a method, heating is performed in a state where one end portion of the water stop coating is pressed against the connecting portion side by the pressing portion, so that the water stop coating is brought into close contact with a predetermined portion without providing a separate positioning means. be able to.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the electric wire with a terminal metal fitting and the electric wire with a terminal metal fitting which can improve waterproofness can be provided.

FIG. 3 is a perspective view showing an electric wire with terminal fittings according to the present embodiment and showing a state before the heat-shrinkable tube is covered. Partially enlarged perspective view of the electric wire with terminal fittings showing a state in which the edge of the heat shrinkable tube is abutted against the abutting portion Partially enlarged perspective view of the electric wire with terminal fittings showing the state after pressing the holding part Partially enlarged sectional view of the electric wire with terminal fittings showing the state before pressing the holding part It is sectional drawing of the electric wire with a terminal metal fitting which shows the state before pressing a holding | suppressing part, Comprising: Sectional drawing corresponded in the cross section in the AA position of FIG. Partially enlarged sectional view of the electric wire with terminal fittings showing the state after pressing the holding part It is sectional drawing of the electric wire with a terminal metal fitting which shows the state after pressing down a holding | suppressing part, Comprising: Sectional drawing corresponded in the cross section in the BB position of FIG. Partially enlarged sectional view of the electric wire with terminal fittings showing the state after heat shrinking the heat shrinkable tube It is sectional drawing of the electric wire with a terminal metal fitting which shows the state after heat-shrinking a heat-shrinkable tube, Comprising: Sectional drawing equivalent to the cross section in CC position of FIG.

<Embodiment>
Hereinafter, an embodiment embodying the present invention will be described in detail with reference to FIGS.
The electric wire 10 with a terminal metal fitting in this embodiment is an electric wire with a terminal metal fitting in which the terminal metal fitting 30 is connected to the end of the electric wire 20 in which the outer periphery of the core wire 21 is covered with the insulating coating 22. In the present embodiment, a case will be described in which the electric wire 20 is an aluminum electric wire provided with a core wire 21 made of aluminum or an aluminum alloy, while the terminal fitting 30 is made of copper or a copper alloy. In the following, each component will be described with the upper left side in FIG. 1 as the front, the lower right side as the rear, the upper side as the upper side, and the lower side as the lower side.

  The electric wire 20 is composed of a core wire 21 formed by twisting a plurality of fine metal wires and an insulating coating 22 made of a synthetic resin that covers the outer periphery of the core wire 21. At the end of the electric wire 20, the insulating coating 22 has a predetermined length. The terminal of the core wire 21 is exposed by being peeled. The core wire may be a single core wire.

  The terminal fitting 30 includes a connection portion 31 connected to a mating male terminal fitting (other conductive member) (not shown), and a wire barrel 32 that is crimped to the end of the core wire 21 exposed from the end of the insulating coating 22. The female terminal fitting 30 includes a connecting portion 33 that connects the wire barrel 32 and the connecting portion 31. The terminal fitting 30 has a structure in which a wire barrel 32 is provided behind a connecting portion 31 via a connecting portion 33 and an insulation barrel 34 is provided behind the wire barrel 32, and a metal plate material is pressed. Formed as a whole, and has an elongated shape in the front-rear direction as a whole. A plating layer (not shown) is formed on the surface of the metal plate. As a metal which comprises a plating layer, arbitrary metals, such as tin and nickel, can be employ | adopted as needed. In the present embodiment, a tin plating layer is formed on the surface of copper or a copper alloy. In addition, it is good also as a structure which does not form a plating layer on the surface of a metal plate material.

  The connecting portion 31 has a substantially rectangular tube shape as a whole, and is connected by inserting a tab of a male terminal fitting (not shown). A bottom plate 35 on which the terminal portion of the electric wire 20 is placed on the upper surface side (one surface side) is provided behind the connection portion 31 so as to extend in the front-rear direction.

  The connecting portion 33 includes a bottom plate 35 and a pair of side plates 36 rising upward from both side edges of the bottom plate 35 and is formed in a U-shaped cross section. The pair of side plates 36 are connected to the connecting portion 31 and the wire barrel 32 in a continuous manner.

  The wire barrel 32 includes a bottom plate 35 and a pair of barrel pieces 32 </ b> A that rise upward from both side edges of the bottom plate 35. The wire barrel 32 is crimped and crimped into a so-called heart shape so that the core wire 21 is held from the outside and bites into the core wire 21 while the protruding edges of both barrel pieces 32A are abutted.

  As with the wire barrel 32, the insulation barrel 34 has a bottom plate 35 and a pair of barrel pieces 34 </ b> A that rises upward from both side edges of the bottom plate 35, and the end of the insulation coating 22 overlaps the protruding end of the barrel piece 34 </ b> A. It is crimped and crimped to a so-called overlap type, which is held together from outside.

  The terminal fitting 30 is integrally provided with a pressing portion 40 that presses a front end portion (one end portion) of a heat-shrinkable tube (water-stop coating) 50 described later against the connecting portion 33 side. The pressing portion 40 has a pair of pressing pieces 41 that are provided at a substantially central position in the front-rear direction of the connecting portion 33 and rise upward from the connecting portion 33.

  The shape of the pressing portion 40 before being pressed is as follows. The pressing piece 41 rises upward from the side plate 36 of the connecting portion 33 and has a shape bent toward the side facing the upper surface of the bottom plate 35. Specifically, the pressing piece 41 has a rising portion 42 that rises upward from the side plate 36, and a facing portion 43 that is bent from the upper end of the rising portion 42 to the side facing the upper surface of the bottom plate 35. The rising portion 42 and the facing portion 43 are substantially perpendicular. The pair of pressing pieces 41 have substantially the same size and the same shape, and face each other across the center line of the terminal fitting 30.

  A slit 44 is formed in the pressing piece 41. The slit 44 is formed in the corner part which consists of the rising part 42 and the opposing part 43, and has comprised the form by which the rear side was open | released. The width dimension of the slit 44 is a dimension that allows insertion of the tip of the heat shrinkable tube 50 before heating, that is, a dimension larger than the thickness dimension of the heat shrinkable tube 50 including the thickness of the adhesive layer 51 before heating. Yes. By forming the slit 44, the end portion on the free end side of the facing portion 43 (the central portion in the width direction of the terminal fitting 30) and the base end portion (the portion on the side plate 36 side) of the rising portion 42, Has a shape protruding rearward. Note that the dimension in the front-rear direction is constant from the rising portion 42 to the facing portion 43 except for the portion where the slit 44 is formed.

The slit 44 includes a lower side surface 44 </ b> A formed at the rising portion 42, an upper side surface 44 </ b> B formed at the facing portion 43, and a front side surface formed at the front end (back end) of the slit 44. The front side surface of the slit 44 is an abutting portion 44 </ b> C capable of abutting the end edge of the heat shrinkable tube 50. Specifically, the edge of the heat-shrinkable tube 50 abuts the range formed in the rising portion 43 in the abutting portion 44C. The abutting portion 44C is substantially perpendicular to the front-rear direction (the axial direction of the terminal fitting 30).
The shape of the pressing portion 40 after being pressed will be described in detail later.

  A heat-shrinkable tube 50 is put on the connection portion between the terminal fitting 30 and the electric wire 20. The heat-shrinkable tube 50 is made of synthetic resin and has a cylindrical shape. The length of the heat-shrinkable tube 50 extends from the connecting portion 33 of the terminal fitting 30 to the end portion of the insulating coating 22 of the electric wire 20 (behind the insulation barrel 34). It is a dimension that can be covered.

Inside the heat-shrinkable tube 50, there is provided an adhesive layer 51 made of a thermoplastic adhesive that exhibits adhesiveness when softened or melted by heating. In the present embodiment, the thickness of the adhesive layer 51 before heat shrinkage and the thickness dimension of the heat shrinkable tube 50 are equivalent (about 0.1 mm). In addition, the diameter of the heat-shrinkable tube 50 including the adhesive layer 51 before heat-shrinking is set such that the connection portion 31 of the terminal fitting 30 can be inserted inside.
The state after the heat-shrinkable tube 50 is heat-shrinked will be described in detail later.

  Next, an example of the manufacturing process of the electric wire 10 with a terminal metal fitting according to the present embodiment will be described. The manufacturing process of the electric wire 10 with a terminal metal fitting of this embodiment is performed using the terminal metal fitting 30, the heat shrinkable tube 50, and the holding | suppressing part 40 mentioned above.

  First, the manufacturing process of the terminal metal fitting which manufactures the terminal metal fitting 30 is performed. In the manufacturing process of the terminal fitting, a punching process for punching a metal plate material into a predetermined shape and a bending process for bending the punched plate material into a predetermined shape are performed. In the punching process, the part constituting the connecting part 31, the part constituting the connecting part 33, the part constituting the wire barrel 32, the part constituting the insulation barrel 34, and the part constituting the pressing part 40 are integrated. Punched into a shape connected to And the manufacture of the terminal metal fitting 30 which has the connection part 31, the connection part 33, the wire barrel 32, the insulation barrel 34, and the pressing part 40 is completed by performing a bending process.

  Subsequently, an electric wire crimping process for crimping the electric wire 20 is performed. First, the insulation coating 22 of the electric wire 20 is peeled to expose the core wire 21, and the end portion of the insulation coating 22 and the core wire 21 exposed from the insulation coating 22 are placed on the upper surface of the bottom plate 35 of the terminal fitting 30. Thereafter, the insulation barrel 34 and the wire barrel 32 are respectively crimped to the insulating coating 22 and the core wire 21 by a mold (not shown).

  Next, a heat-shrinkable tube positioning step for positioning the heat-shrinkable tube 50 at a predetermined position of the electric wire 10 with terminal fittings is performed. After the heat-shrinkable tube 50 is inserted from the terminal fitting 30 side, the front end portion of the heat-shrinkable tube 50 is inserted into the slit 44 of the holding portion 40, and the front end edge is abutted against the abutting portion 44C (see FIG. 2). ). Thereby, the heat-shrinkable tube 50 is arrange | positioned and positioned in the predetermined position which covers the connection part of the terminal metal fitting 30 and the electric wire 20. FIG. At this time, there is a large gap between the heat shrinkable tube 50 and the connecting portion 33. When the electric wire 10 with terminal fittings is lifted, the heat shrinkable tube 50 is supported by the lower side surface 44A of the slit 44 and the lower surface of the facing portion 43 in a horizontal manner as shown in FIG. It is in a stretched state, and most of the state hangs down below the connecting portion 33. The heat-shrinkable tube 50 may be inserted from the electric wire 20 side. In this case, it is preferable that the heat-shrinkable tube 50 is inserted through the electric wire 20 in advance before the electric wire crimping step described above.

  Subsequently, a pressing process is performed in which one end portion of the heat shrinkable tube 50 is pressed against the connecting portion 33 side by the pressing portion 40. When the pressing portion 40 is pressed against the bottom plate 35 by a mold (not shown), a portion having a small width (a corner portion formed by the rising portion 42 and the facing portion 43) of the pressing piece 41 is bent. A portion of 42 is bent inward, and a portion of the facing portion 43 is bent along the inner surface of the side plate 36 (see FIG. 7). Then, the end portion on the free end side of the facing portion 43 approaches the bottom plate 35 side and reaches a position below the lower side surface 44A of the slit 44.

  And the heat contraction tube 50 will be in the state pinched | interposed between the holding | suppressing part 40 and the connection part 33 of the terminal metal fitting 30 (refer FIG. 3). Specifically, a part of the heat shrinkable tube 50 is sandwiched between the facing portion 43 of the pressing portion 40 and the bottom plate 35 of the connecting portion 33 and between the facing portion 43 of the pressing portion 40 and the side plate 36 of the connecting portion 33. It becomes a state. That is, the heat-shrinkable tube 50 is in a deformed state so as to follow the shape of the connecting portion 33 (so as to follow a U-shaped recess) (see FIG. 7). The heat-shrinkable tube 50 comes into contact with the lower surface 44A of the slit 44 and the lower surface of the facing portion 43, and is sandwiched from above and below, so that the heat-shrinkable tube 50 is temporarily fixed at a predetermined position of the electric wire 10 with terminal fittings.

Thereafter, a heating process is performed in which the heat shrinkable tube 50 is heated and shrunk to bring the adhesive layer 51 into close contact with the connecting portion 33. When the heat-shrinkable tube 50 is heated by a heating device (not shown), the heat-shrinkable tube 50 is shrunk, and the adhesive layer 51 provided on the inner side melts, so that there is no gap on the outer surface of the connection portion between the terminal fitting 30 and the electric wire 20. Adhere closely (see FIG. 8 and FIG. 9). Specifically, when the heat-shrinkable tube 50 is heated and shrunk, the adhesive layer 51 adheres to the outer surface of the connecting portion 33, the core wire 21, the wire barrel 32, the insulation barrel 34, and the insulating coating 22 without gaps over the entire circumference. To do. More specifically, the adhesive layer 51 fills the space between the joint portion 33 and the heat-shrinkable tube 50 without any gap, and is in close contact with the entire outer surface of the joint portion 33. Specifically, the adhesive layer 51 includes an inner surface and an outer surface of the connecting portion 33, that is, an inner surface (opposing surface) and an outer surface of the pair of side plates 36, and an inner surface (upper surface) and an outer surface (lower surface) of the bottom plate 35. ) And the upper end surface of the side plate 36 (the rising end surface from the bottom plate 35) and the lower side surface 44A of the slit 44 without any gap.
Thus, the manufacture of the electric wire 10 with terminal fittings is completed. In addition, by heat-shrinking, the thickness dimension of the heat-shrinkable tube 50 increases from before heating. In the present embodiment, the thickness dimension (excluding the adhesive layer 51) of the heat-shrinkable tube 50 after heat-shrinking is about 0.2 mm to 0.3 mm. Moreover, a heating process may be performed by a batch process and may be performed by a continuous process.

Next, operations and effects of the first embodiment configured as described above will be described.
The electric wire 10 with a terminal metal fitting of the present embodiment is an electric wire with a terminal metal fitting in which the terminal metal fitting 30 is connected to the end of the electric wire 20 in which the outer periphery of the core wire 21 is covered with the insulating coating 22. A connecting portion 31 connected to the conductive member, a wire barrel 32 crimped to the core wire 21 exposed from the end of the insulating coating 22 at the end portion of the electric wire 20, and a connecting portion 33 connecting the wire barrel 32 and the connecting portion 31. And a heat-shrinkable tube 50 provided with an adhesive layer 51 made of a thermoplastic adhesive, and a heat-shrinkable tube 50. A pressing portion 40 that presses one end of the heat shrinking tube toward the connecting portion 33 side. One end portion of the heat shrinkable tube 50 is pressed against the connecting portion 33 side by the pressing portion 40 and the adhesive layer 51 is connected. It is in close contact with the part 33.

  Thereby, since the one end part of the heat contraction tube 50 can fully be stuck to the connection part 33, waterproofness can be improved. Moreover, since it is only necessary to add a simple operation of pressing one end of the heat-shrinkable tube 50 against the connecting portion 33 side, the waterproof property can be easily improved.

  In addition, a bottom plate 35 on which the terminal portion of the electric wire 20 is placed on the upper surface side is provided extending from the connecting portion 33 to the wire barrel 32, and the holding portion 40 is formed integrally with the terminal fitting 30. It is arranged to face one surface of the bottom plate 35. Thereby, compared with the case where the separate component which has a holding | suppressing part is used, the increase in a number of parts can be prevented.

  The pressing portion 40 is provided with an abutting portion 44 </ b> C capable of abutting the end edge of the heat shrinkable tube 50. Thereby, since the end edge of the heat-shrinkable tube 50 can be positioned by abutting against the abutting portion 44 </ b> C provided in the pressing portion 40, other positioning means may not be provided.

  The connecting portion 33 includes a bottom plate 35 and a pair of side plates 36 rising from both side edges of the bottom plate 35 to the upper surface side, and has a certain depth from the rising ends of the pair of side plates 36 to the bottom plate 35. doing. Therefore, a relatively large gap is formed between the heat shrinkable tube 50 before heat shrinkage and the bottom plate 35 of the connecting portion 33. For this reason, in order to make the one end part of the heat-shrinkable tube 50 fully adhere | attach with respect to the connection part 33, the one end part of the heat-shrinkable tube 50 is pressed on the baseplate 35 side with the holding | suppressing part 40 like this embodiment. Is particularly effective.

Moreover, the core wire 21 and the terminal metal fitting 30 are formed of different metals. In such a case, if moisture is present in the connecting portion between the two, both metals are dissolved as ions in the water, and there is a possibility that galvanic corrosion in which corrosion proceeds due to an electrochemical reaction may occur. Therefore, since it is particularly important to ensure waterproofing of the connecting portion between the electric wire 20 and the terminal fitting 30, it is particularly effective to improve the waterproofness as in this embodiment.
Moreover, since the electric wire 20 is the aluminum electric wire 20 provided with the core wire 21 made of aluminum or aluminum alloy, the weight of the electric wire 10 with terminal fitting can be reduced.

  And the manufacturing method of the electric wire 10 with a terminal metal fitting of this embodiment makes the shape which covers from the connection part 33 to the terminal of the insulation coating 22, and the adhesive layer 51 which consists of a thermoplastic adhesive is provided in the inner side. The heat-shrinkable tube 50 and the holding portion 40 that presses one end of the heat-shrinkable tube 50 against the connecting portion 33, and presses the one end of the heat-shrinkable tube 50 toward the connecting portion 33 with the holding portion 40. A pressing step for attaching, and a heating step for heating and shrinking the heat-shrinkable tube 50 to bring the adhesive layer 51 into close contact with the connecting portion 33 are performed.

  Thereby, since the one end part of the heat contraction tube 50 can fully be stuck with respect to the connection part 33, waterproofness can be improved. In addition, since the holding portion 40 heats one end of the heat shrinkable tube 50 against the connecting portion 33 side (temporarily fixed state), the heat shrinkable tube 50 is fixed to a predetermined position without providing a separate positioning means. It can be closely attached to the site. Further, by temporarily fixing the heat shrinkable tube 50 in the stage before the heating process, the heat shrinkable tube 50 is disposed again at a predetermined position when moving from the place where the wire crimping process is performed to the place where the heating process is performed. There is no need, and the work process can be simplified and the work time can be shortened. Further, the pressing step is a simple work (work that can be performed in about 0.3 seconds in the present embodiment) in which one end portion of the heat shrinkable tube 50 is pressed against the connecting portion 33 side by the pressing portion 40. Therefore, the time required for manufacturing can be suppressed to the same level as the time required for manufacturing a conventional electric wire with terminal fittings.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

(1) In the above embodiment, the terminal fitting 30 is a female terminal fitting. However, the present invention is not limited to this, and the terminal fitting may be a male terminal fitting provided with a male tab. A so-called LA terminal or the like in which a through hole is formed may be used, and a terminal fitting having an arbitrary shape can be formed as necessary.
(2) In the said embodiment, although the core wire 21 of the electric wire 20 was set as the structure which consists of aluminum or aluminum alloy, it is not restricted to this, The core wire of an electric wire is good also as a structure which consists of copper or a copper alloy, and is arbitrary as needed. It is good also as a structure formed with these metals. In the present embodiment, the terminal fitting 30 is made of copper or a copper alloy and a tin plating layer is formed on the surface. However, the present invention is not limited to this, and the terminal fitting is made of any metal as necessary. It is good also as a structure.

(3) In the above embodiment, the case where the connecting portion 33 of the terminal fitting 30 has a U-shaped cross section has been described. However, the present invention can be applied to any shape of the connecting portion of the terminal fitting. For example, the present invention can be applied to a case where the connecting portion has a flat plate shape.
(4) In the above embodiment, the abutting portion 44C is the front side surface of the slit 44 formed in the pressing portion 40. However, the present invention is not limited to this, and for example, the abutting portion 44C is formed by raising a part of the pressing portion. This part may be formed.

(5) In the above embodiment, the pressing portion 40 has a pair of pressing pieces 41 that rise upward from the side plate 36 of the connecting portion 33, but the shape of the pressing portion can be any shape, for example, The holding portion may have only one holding piece extending from only one side plate of the connecting portion toward the other side plate, and the holding piece extends from the connecting portion to the connecting portion side. It is good.
(6) In the said embodiment, although the holding | suppressing part 40 is provided integrally with the terminal metal fitting 30, you may mount | wear with the separate components which have not only this but a holding | suppressing part, for example.

(7) In the above embodiment, the heating step is performed after pressing one end portion of the heat shrinkable tube 50 to the connecting portion 33 side by the pressing portion 40, but not limited to this, one end portion of the heat shrinkable tube. May be pressed by a mold and a heating process may be performed while maintaining the state.
(8) In the above embodiment, an example using the heat-shrinkable tube 50 as the water-stop coating has been shown. However, the present invention is not limited to this. For example, an elastic tube having rubber elasticity may be used as the water-stop coating, You may use what formed the sheet-like water stop tape around the connection part of an electric wire and a terminal metal fitting, and was formed in the cylinder shape.

DESCRIPTION OF SYMBOLS 10 ... Electric wire with a terminal metal fitting 20 ... Electric wire 21 ... Core wire 22 ... Insulation coating 30 ... Terminal metal fitting 31 ... Connection part 32 ... Wire barrel 33 ... Connecting part 35 ... Bottom plate 36 ... Side plate 40 ... Holding part 44C ... Abutting part 50 ... Heat Shrinkable tube (waterproof coating)
51. Adhesive layer

Claims (11)

An electric wire with a terminal fitting, in which the terminal fitting is connected to the end of the electric wire whose outer periphery is coated with an insulation coating,
The terminal fitting includes a connection portion connected to another conductive member, a wire barrel crimped to the core wire exposed from the end of the insulating coating at the end portion of the electric wire, and the wire barrel and the connection portion. Having a connecting portion to connect,
While forming a shape that covers from the connecting portion to the terminal of the insulating coating, a water-stop coating provided with an adhesive layer on the inside,
A pressing portion that presses one end portion of the water blocking coating against the connecting portion side is provided,
One end portion of the water-stop coating is pressed against the connecting portion side by the pressing portion, and the terminal-attached electric wire with a terminal fitting in which the adhesive layer is in close contact with the connecting portion. A bottom plate on which the terminal portion of the electric wire is placed on one side is provided extending from the connecting portion to the wire barrel,
The electric wire with a terminal fitting according to claim 1, wherein the pressing portion is formed integrally with the terminal fitting and is disposed to face one surface of the bottom plate of the connecting portion.   The electric wire with a terminal fitting according to claim 2, wherein the pressing portion rises from the connecting portion to one surface side of the bottom plate and is bent to a side facing the one surface of the bottom plate.   The electric wire with a terminal fitting according to any one of claims 1 to 3, wherein the pressing portion is provided with an abutting portion capable of abutting an end edge of the water blocking coating. A bottom plate on which the terminal portion of the electric wire is placed on one side is provided extending from the connecting portion to the wire barrel,
The electric wire with a terminal fitting according to any one of claims 1 to 4, wherein the connecting portion includes the bottom plate and a pair of side plates rising from both side edges of the bottom plate to the one surface side.   The electric wire with a terminal fitting according to any one of claims 1 to 5, wherein the waterproof coating is made of a heat-shrinkable tube.   The electric wire with a terminal fitting according to claim 6, wherein the adhesive layer is made of a thermoplastic adhesive.   The electric wire with a terminal fitting according to any one of claims 1 to 7, wherein the core wire and the terminal fitting are formed of different kinds of metals.   The said electric wire is an aluminum electric wire provided with the core wire made from aluminum or aluminum alloy, The electric wire with a terminal metal fitting as described in any one of Claim 1 thru | or 8. A method of manufacturing an electric wire with a terminal metal fitting, which manufactures an electric wire with a terminal metal fitting to which the terminal metal fitting is connected to the end of the electric wire whose outer periphery is coated with an insulation coating,
The terminal fitting includes a connection portion connected to another conductive member, a wire barrel crimped to the core wire exposed from the end of the insulating coating at the end portion of the electric wire, and the wire barrel and the connection portion. Having a connecting portion to connect,
A shape that covers from the joint portion to the end of the insulation coating, and a water stop coating provided with an adhesive layer on the inside thereof, and a pressing portion that presses one end portion of the water stop coating against the connection portion side. Use the
The manufacturing method of the electric wire with a terminal metal fitting which performs the pressing process which presses down the one end part of the said water stop coating | cover to the said connection part side with the said press part. The water-stop coating is a heat shrinkable tube,
The manufacturing method of the electric wire with a terminal metal fitting of Claim 10 which performs the heating process which heats and shrinks the said water stop coating and makes the said contact bonding layer closely_contact | adhere to the said connection part after the said pressing process.

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