JPH01217877A - Water-tight insulating connector of wire and water-tight insulating connection - Google Patents

Abstract

PURPOSE:To improve water-tightness and prevent cutting of a wire connecting base part by a method wherein a wire inserting side is extension-coated using a thermocontracting resin material and a thermomelting resin layer is formed on the inside thereof, further, the fitting cylindrical parts covering over the connection parts are mutually fitted followed by fitting a water-tight ring blocking a gap on the fitting cylindrical part. CONSTITUTION:Bare terminal parts (k) of a coated wire K are inserted into the wire connection cylindrical parts 1a and 11b' and wire coatings (c) are inserted into the large diameter parts 2b and 12b of the coated cylinders 2 and 12. Next, the small diameter parts 2a and 12a of the coated cylinders 2 and 12 are pressed from above by using a press equipment to deform the cylindrical parts 1a and 11b' respectively so as to press-fix the bare terminal parts (k) for being held between. Next, a thermocontracting tube 3 is heated, contracted and deformed by a heating equipment. At the same time, thermomelting resin 3b and 13b stuck on the respective insides are melted so as to tightly stick the tube cylindrical parts 3a and 13a on the coated parts (c), (c) of the connecting wires K, K. Further, the fitting cylindrical parts 2c and 12c covering on the connection parts are mutually fitted and a water tight ring 5 to block a gap is fitted to these fitting cylinder parts.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is directed to coating ta and coating F! The present invention relates to a connecting tool for intermediate connection of tm used for watertight connection with electric wires, and a connection method using this connecting tool.

<Prior Art> Conventionally, this type of connector for connecting the middle of electric wires has been commercialized in the form of a reed in which only an insulating coating tube is covered with a connecting terminal.

This conventional electric wire connecting tool simply consists of a synthetic resin tube covering the entire male and female electric wire connecting terminals.

<Problems to be Solved by the Invention> Therefore, the conventional electric wire connector has a large diameter portion of the insulating liquid Wtm into which the coating portion (c) of the end of the electric wire (K) to be connected is inserted, and the outer peripheral surface of the coating of the electric wire. There are gaps between them, making it impossible to maintain watertightness at the connections where the insulation is peeled off and the wires are made into bare wires.Also, there are gaps between the mating parts of the male and female insulation sheathing tubes, making it impossible to maintain watertightness. Since it could not be maintained, there was a problem that it could not be used in humid places with a lot of water droplets, etc. due to the risk of electrical leakage.

In addition, in such conventional products, as mentioned above, the insulating liquid W! Because there is a gap between the large diameter part of the wire and the outer circumferential surface of the wire sheathing, as well as between the fitted insulation sheathing tubes, the external force that the wire receives in the radial direction and the vibration transmitted from the connected equipment are absorbed by the bare wire. There is a problem in that the electric wire connects to the outer part of the terminal tube part, that is, the connection base with the terminal tube part, and the wire connection base becomes weak and breaks.

Furthermore, such external forces acting on the wires or vibrations from the equipment may cause the connection terminals to become disconnected, resulting in an unexpected situation.

The present invention aims to solve the problems of the conventional products all at once, and the large diameter part of the sheathing tube is made into a large diameter part into which the sheathing part of the connecting wire can be easily pushed in when connecting the wires. However, after the electric wire is connected, this large diameter portion can be sealed by another cylindrical portion that is contracted and deformed so as to come into close contact with the outer peripheral surface of the sheathing portion of the electric wire, and
The present invention proposes an electric wire connector that can also maintain a watertight state in the gap between the mating cylinder and the dirt floor, and a watertight insulated connection method for electric wires using the same.

Means for Solving the Problem> The structure of the present invention for achieving this object will be explained using FIGS. 1 to 9 corresponding to the embodiment. A pair of electric wire connectors (A) and (B) consisting of a male type and a female type formed so as to make an electrical connection by mating, the wire connecting tube part (1a)
A metal male connection terminal (
1>, a small diameter part (2m) that fits and covers the cylindrical part (1&) of this male connection terminal (1), and a large diameter part (21i) for covering the top of the covering part CC of the electric wire (K) and the other mating part (
12c) and a fitting cylinder part (2c) that fits together with each other; Kuni)'s cover)! A male connector (A) consisting of a heat-shrinkable tube (3) having a sieve part (3a) covering part (c) and a heat-meltable resin layer (3b) not adhered to the inner surface thereof, and an electric wire. A metal male connection terminal (11) having a connection cylinder part (l1a) and a female connection part (ITo) that fits with the male connection part (1b) to establish an electrical connection, and this female connection. The small diameter part (12 m) that fits and covers the cylindrical part (11a) of the terminal (11) and the electric wire (
A large diameter part (12b) for covering the covering part (c) of K).
) and a fitting cylinder part (
12c), a synthetic resin covering cylinder I cylinder (12),
A cylindrical body (13m) that is adhered to at least the outer peripheral surface of the large diameter portion (12b) of the sheathing tube (12) and covers the sheathing portion (c) of the electric wire (K), and a hot-melt resin that is adhered to the inner surface thereof. N(
13b) and a heat-shrinkable tube (13) having a heat-shrinkable tube (13b);
), (12), the tip portion of at least one of the covering tubes (2), (12) is inserted and fitted into both the connecting portions (Tones (11b)) of the terminals (1), (11). The fitting cylinder part (12a) extended from the other side in the posture
, (2a) is formed to a length that covers the upper part, and one of the refitting cylinder parts (2c) and (12c) has a relative fitting part with a gap (C) between the two to make it watertight. It has a structure in which a watertight ring (5) is fitted and held, and the resin layer (3b) in the heat-shrinkable tubes (3) and (13)
) is made of a resin material that melts at a temperature below m degrees of heat shrinkage of the heat-shrinkable tubes (3) and (13).

In addition, the electric wire connection method is a method of connecting wires in a watertight and insulated manner using the above-mentioned connector, and includes a male connector (A) and a female connector (B). W! Electric wire (K)
Insert the bare end (k) of
), (12) large diameter part (Zl+), (12b)
After inserting the covering part (c) of Niden n, use a pressure tool to press the small diameter part (2 m) of the covering tube (2), (12), (12
m) Pressurize (6) the upper part of the wire connecting cylinder part (1a>, (
Ilg> are respectively deformed and the bare ends (k) are crimped and clamped, and then heat-shrinkable tubes (3),
The entire circumferential surface of (13) is heated and shrunk at the same time as the hot-melt resin layer (3b).

By heating and melting (1: Th) and shrinking it tightly onto the covering part (a) of the covering 'r4ta (K), the male mosquito connector (A) is attached to the two covered wires (K) and (K). ), (B)
and then connect the wire connections (lb) and (ll) in these male mosquito connectors (A) and (b), respectively.
b) are relatively fitted together, and the fitting portion (2c),
(12c) are fitted relative to each other, and both ti! Combined tube part (2c)
, (12c) is increased by +71n by the watertight ring (5), and the male and female connecting portions (1b) and (11b) in the mating position are covered by the mating portions (2c) and (1).
2e) is the method of encasing and sealing and insulating it.

Function> Since the present invention is as described above, for example, in a motor factory and a manufacturing factory of equipment into which this motor is installed, male and female connection terminals (1), (11), each cylindrical part (1a), (I
After connecting 1 to wires (K) and (K), heat-shrink the outer circumferential surfaces of each heat-shrinkable tube (3) and (13) using a heating device such as a pot gun, and at the same time Hot-melt resin/I (3b) adhered to the inner surface
, (13b), the cylindrical portions (3m), (13m) of the tubes are connected via the hot melted resin layers (3b), (13b) to wires (K), (
It is brought into close contact with the covering parts (c) and (a) of K).

In this way, after the motor is assembled into the equipment at an assembly factory or in an assembly process, as shown in FIG. The portions (2c) and (12c) are inserted and fitted into each other to connect them.

<Example> Embodiments of the present invention will be described below based on the drawings.

1 to 9 are diagrams showing a first embodiment of the present invention.

In this embodiment, the electrical connection parts (11I) and (11b) between the connectors are formed into a rod shape and a cylindrical shape that fits into the rod shape. This is an example using connection terminals (1) and (11). Then, these two metal connection terminals (1
), (H) are made of steel, and the outer covering tubes (2), (12)
is made of semi-rigid PVC and heat-shrinkable tube (3
), (13) are lightly colored translucent nylon products, with hot-melted polyamide material 1 (3b), (1
3b) is a double tube shape to which is glued. The covering tubes (2) and (12) are formed of two large and small cylindrical portions with full-length concentric circles and a fitting cylindrical portion, with a small diameter portion (2 m) in the middle.
, A pair of left and right connection terminals (1), (1) within (12m)
The cylindrical parts (1a) and (11a) of 1) are each internally installed. In addition, the tubes (3) and (13) are also circular cylindrical bodies with one end located on the small diameter side (2 m) and (12a), and only the outer circumferential surface of the tube is heated and shrunk and shrink bonded to the small diameter part. This is what I did. By doing this, one end of these covering tubes (2), (12) has large diameter portions (2b), (12b) and fitting tube portions (2c), (12c) extending to the other end. It is formed by connecting these.

In this embodiment, the connecting portions (lb) and (llb) of the connecting terminals (1) and (11) are formed into a male rod shape, and the fitting cylinder portion (2c) on the side of the connecting tool (A) is As a small diameter cylinder,
The fitting cylinder part (12c) on the other connector (B) side is a large diameter cylinder so that they fit together, and the fitting cylinder part (2c) on the small diameter side has an annular groove ( 4), and a watertight rubber ring (5) is fitted into the groove, and the ring (5) is fitted into the other large-diameter fitting cylinder part (12c) in the fitting position. Shallow annular m on the inner peripheral surface of the located part
(14) is formed.

Next, the thus formed male and female connector (A).

A method for connecting electric wires using (B) will be explained.

First, to explain the connection of the electric wire to the male connector (A), for example, in a motor (not shown) manufacturing factory, the end of the covering part n (K) pulled out from the motor is peeled off and the bare part ml is removed. Insert the electric wire (K) with the (k) part formed from the opening side of the tube (3) as shown in Figure 1, and connect the bare electric wire (k) part to the connection terminal (1) as shown in Figure 3.
As shown in FIG. The outer peripheral part of the cylindrical part (1 plant) is compressed and deformed (6) using a pressure tool to sandwich the bare wire part (k), and then the large diameter part (2b) is also compressed and deformed by pressure. (7) The wire covering portion (,) is held between the wires, and then the heat-shrinkable tube (3) is heat-shrinked and deformed as shown in item 711 using a heating device such as a hot gun.

By this heating operation, the hot melt layer (3b) adhered to the inner surface of the tube (3) is melted and El! Covering part (c) of (K) and tube (3)
), a portion remains between the two and a portion flows outward to form a lump (3c).

In this way, between the end of the wire sheathing part (c) located inside the sheathing cylinder (2) and the end of the cylindrical part (1a) of the terminal (1) and the end face of the large diameter cylinder (2b), are integrally and watertightly covered with a heat-shrinkable tube (3) via a heat-melting resin layer (3).

On the other hand, for example, in a factory that manufactures the control unit of an electric washing machine in which the motor is installed, the electric wire (K> shown in FIG. Push the bare electric wire ((1) into the cylindrical portion (l1a) of the terminal (11) using the female side connector (B) in the same manner as described above.
(Fig. 4), pressurization and compression deformation (6) of the cylindrical portion (Fig. 6), heat shrinkage deformation of the tube (3), and tightly adhering to the wire covering part (c) (Fig. 8) are performed in sequence.

In this way, the motor and operating equipment are transported to an assembly factory, and when assembled into the casing of the washing machine, the male connector (A) and the female connector (A) and the female connector ( B) and the connecting part (lb) of both (A) and (B)
), (llb) and the fitting cylinder part (2c).

(12a) are inserted and fitted into each other, as shown in the figure.
The gap (C) between the two fitting cylinder parts (2a) and (12c)
) with the rubber ring (5), and connect both connectors (A).
.

(B) are fitted and connected in a watertight manner.

By doing this, the electrical connection between the motor and the operating equipment can be made easily and completely watertight, without having to perform complicated and unreliable watertight connections such as soldering or tape wrapping, and also prevents vibrations. The pillow should be placed in such a way that it will not come off due to other factors.

In this example, the tube (3) shown in Figure 7.8
, (13) Electric wire (K), (K) covered 1 t$ (
c), (c) It was explained that the heat bonding process on the top is performed at each manufacturing factory (or process), but this heat bonding process is performed at the assembly factory (or process) on both connectors (
It goes without saying that A) and (B) may be performed simultaneously when concatenating.

In the embodiment shown in FIGS. 10 to 14, the connecting portions of the connecting terminals (1) and (11) shown in the first embodiment are rod-shaped (1b) and cylindrical (llb). Instead, as shown by chain lines or partial chain lines in Figures 10 and 11, the male side connection part (lb) (Figure 10) is made into a flat plate made of copper plate material, and the female side connection part (111J) (No. 11-
(Fig.) is made of brass plate material and has a so-called faston shape with both sides formed in a half-curl shape, and both connecting parts (lb) and (IT
o) It has a shape in which it is covered with a fitting cylinder part (2c), <12c) of the covering cylinder (2), (12) whose upper part is a rectangular cylinder shape.

The heat-shrinkable tubes (3) and (13) are injection-molded high-density polyethylene (HDPE) molded products with enlarged diameter, and the entire inner surface thereof is coated with polyamide P%.
Meltable resin N (3b) is adhesively formed.

Each of these products is manufactured in a separate manufacturing factory.
During the processing process, as shown in Figures 12 and 13, the coating was removed in the same manner as in the previous embodiment.
(K) and (K) are twisted together and terminals (1) and <11
) No.M (Ia), (Ilm), press the outer circumferential surface with a pressure tool (6), (6) to connect and clamp the tube <3), (13) The outer periphery of the wire (K) is heated with a heating flame to shrink it.

It is brought into close contact with the coated parts (c) and (c) of (K).

At this time, the heat-melting resins l (3b) and (13b) in these tubes (3) and (13) are thermally melted, and as shown in Fig. 14, some of the tubes (3m) and (1341) shrink. is the wire (K) and the covering part (c) of (K)
), (c) extruded on top of the lump (3c), (13c)
This will maintain watertightness.

In this way, the two electric wires (K),
Connectors (A) and (8) are attached to the end of (K),
When connecting electric wires in an assembly factory or assembly process,
As shown in FIG. 14, the ta continuation part (1b).

At the same time as (llb) is fitted and connected, the rectangular fitting cylinder parts (2c) and (1'2c) are fitted, and both cylinders v5 (
2c).

The gap (C) between (12c) is closed with a rubber ring (5) to make it watertight.

The fitting cylinder portions (2c) and (1) of the coverings m (2) and (Iz) in both the male and female connections (A) and (B) according to the present invention
2c) may have a large diameter on either side and a small diameter on either side, and
The length may be such that the internal connecting portions (1b) and (llb) can be fitted into each other in the connected position and have a fitting portion necessary for fitting the watertight ring (5).

Therefore, the fitting cylinder portion (1) of the female connector (B) according to the present invention
2a) is the connection part (1111) of the female connection terminal (11)
It may be sized so that it fits directly on the outer periphery of the.

Furthermore, the lengths of the double-bottomed cylindrical portions (2c) and (12c) are made shorter than the lengths of the internal terminal connection portions (1b) and (11b), respectively, and both of these connection portions (To) are <1.
The connection starting operation 1b) may be performed directly in the naked state, so that the double-sided joining tube portions (Za) and (12c) can be polymerized in a small area on the tip side.

The heat-shrinkable tubes (3), (13) and the heat-melting resin layers (3b>, (131i>) referred to in the present invention are not only those explained in the above embodiments, but also two of high-temperature nylon and low-melting nylon. It may be multi-layered, and the heat-melting material formed on the inner layer may be a heat-melting adhesive, especially polyvinyl chloride (PVC), which is used in some cases as a covering material for electric wires. Materials with good adhesive properties are suitable.

Also, if the heat-shrinkable tubes (3) and (13) are colored and have different colors depending on the inner diameter size of the internal terminal tube portions (1a>, (l1a)), it will be convenient to avoid making mistakes in the size. Can be used.

Moreover, the internal connection terminals (1) and (11) crimp the cylindrical parts (1a) and (11a) by applying pressure! ! It goes without saying that it may be of the type 2 or a type that compresses the cylindrical portions (la) and (11a) by pressurization.

In addition, in the above description, the connection terminal (1) is used.

The connector (A) on the side in which the JIIIg connection terminal (1) is installed in (11) is called the male connector, but this name is for convenience and is based on the sex of the coupling tube parts (2c) and (12c). Needless to say, you can call it that.

Although the embodiments that are considered to be substitutes for the present invention have been described above, the present invention is not necessarily limited to the structure of these embodiments or the method of the present embodiment, and the present invention is not necessarily limited to the structure of these embodiments or the method of this embodiment. The present invention can be modified and implemented as appropriate within the scope of achieving the purpose of the present invention and having the following effects.

Effects of the Invention> As is clear from the above description, the present invention is an electric wire connector in which the cylindrical portion of the metal terminal is coated with a synthetic resin material to maintain insulation, and the wire insertion side is coated with a synthetic resin material. Extend lI1 using heat-shrinkable resin material. and a heat-melting resin layer is formed on the inner surface of the metal connection terminal, and the fitting cylinder parts that cover the connection parts of the metal connection terminal are fitted into each other when the connection parts of the metal connection terminal are connected to each other. At least one of the mating cylinders is fitted with a watertight ring that closes the gap, so when connecting the TTI male connection terminals, the RFT-covered mating cylinders are also mated and connected to each other at the same time. By only this connection operation, the gap between the fitting cylinder parts is sealed watertight, and the heat-shrinkable tube is heated and shrunk, and at the same time the heat-meltable resin layer is melted and the wire is coated on the FItl and covering part. The molten resin acts as an adhesive and a sealant, and the middle #a connection part of the wire can be sufficiently watertight, and the terminal tube part and the end of the wire sheathing can be kept in close contact with each other. It is possible to avoid local concentration of vibrations, etc. at the base end of the bare electric wire between the wire and the wire, and it can be used in a state where there is little risk of electrical leakage even in a humid atmosphere.

At the same time, intensive deterioration of the base end of the bare wire due to external vibrations, tensile force, etc. lit! This has the great advantage of being able to prevent damage and ensure that the wire connections can withstand many years of use.

[Brief explanation of the drawing]

1 to 9 are diagrams showing a first embodiment of the present invention, in which FIGS. 1 and 2 are perspective views, FIGS. 3 and 4 are central longitudinal sectional views, and FIGS. Fig. 9 is a central vertical sectional view showing the connection method in sequence, Figs. 10 to 14 show other embodiments, Figs. 10 and 11 are perspective views, and Figs. FIGS. 14A and 14B are central vertical cross-sectional views sequentially showing the connection method. In the figure, (1) and (11) are connection terminals, (1a) and (11) are cylindrical parts, (lb) and (flb) are fi: shaped parts, (2)
, (12) is the covering part, (2). (12m) is the small diameter part, (2b), (12b) is the large diameter part, and (2c). (12c) is the fitting cylinder part, (3) is the heat-shrinkable tube, (
3b) is a hot melt resin layer, (5) is a watertight ring, (6)
is the pressurizing part, (A) is the male Ill connector, (B) is the female connector, (C) is the gap, (K) is the electric wire, (k) is the bare end, (
6) indicates a covering portion.

Claims (1)

[Scope of Claims] [1] A pair of electric wire connectors (A) and (B) consisting of a male mold and a female mold formed so as to establish an electrical connection by inserting and fitting each other, A metal male connection terminal (1) having a wire connection tube part (1a) and a male connection part (1b)
), a small diameter part (2a) that fits inside and covers the cylindrical part (1a) of the male connection terminal (1), and a large diameter part (2b) that covers the covering part (c) of the electric wire (K). and the other fitting cylinder part (12
a synthetic resin sheathing tube (2) having a fitting tube portion (2c) that fits together with the sheathing tube (2); A heat-shrinkable tube (K) having a cylindrical part (3a) covering the covering part (c) and a heat-melting resin layer (3b) adhered to its inner surface (
3), a male side connector (A) consisting of
1a) and a female connecting portion (11b) that fits with the male connecting portion (1b) to establish an electrical connection; and this female connecting terminal (11). The cylindrical part (1
The small diameter part (12a) for internally fitting and covering the electric wire (K), the large diameter part (12b) for covering the covering part (c) of the electric wire (K), and the fitting cylinder part (2c) are mutually fitted. Fitting cylinder part (12c
), a synthetic resin covering tube (12) having a covering tube (
12) is bonded to at least the outer peripheral surface of the large diameter portion (12b) and covers the covering portion (c) of the electric wire (K).
) and a heat-shrinkable tube (13) having a heat-fusible resin layer (13b) adhered to its inner surface; 12
) at least one of the covering tubes (2) and (12
) is the connection part (1b) of terminals (1) and (11).
) and (11b) are formed in a length that covers the fitting cylinder portions (12c) and (2c) extended from the other side when inserted and fitted into each other, and
A watertight ring (5) that keeps the relative fitting gap (C) between the two fitting cylinders watertight is fitted into one of the fitting cylinder parts (2c) and (12c). and the resin layer (
3b) is a watertight insulated connector for electric wires, which is made of a resin material that melts at a temperature below the heat-shrinking temperature of the heat-shrinkable tubes (3) and (13). [2] A method for connecting electric wires in a watertight and insulating manner using the watertight insulating connecting device for electric wires according to claim [1], the method comprising: a male side connecting device (A) and a female side connecting device (B). ) and insert the bare end (k) of the coated wire (K) into the wire connection tubes (1a) and (11a), respectively, and the coated tubes (2) and (12).
) The large diameter part (2b) and (12b) of the wire are coated with the wire sheathing part (c).
After inserting the cover tubes (2) and (12) using a pressure tool,
) are pressurized (6) on the small diameter portions (2a) and (12a) to deform the wire connection tube portions (1a) and (11a) respectively to crimp and clamp the bare end (k), and then heated. Using a tool, the entire circumferential surface of the heat shrinkable tubes (3) and (13) is heated and shrunk, and at the same time the heat meltable resin layers (3b) and (13b) are heated and melted to form a coated portion of the covered electric wire (K). (c) By shrinking and tightly contacting the two covered wires (K), (K
) to connect the male and female connectors (A) and (B) respectively,
After that, the wire connecting parts (1b) and (11b) of these male and female connectors (A) and (B) are relatively fitted together, and the fitting cylinder parts (2c) and (12c) are relatively fitted,
The gap (C) between the two fitting cylinder parts (2c) and (12c) is closed by the watertight ring (5), and the top of the male and female connecting parts (1b) and (11b) in the mating position is closed by the fitting cylinder part. (2c
), (12c) A watertight insulated connection method for electric wires that are sheathed and hermetically insulated.