JPH0258750B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides an insulator for a wire connection terminal used to connect a covered wire to a covered wire in a watertight manner using a connection terminal to connect the connection portion in a watertight manner. This invention relates to a method for insulating and connecting electric wires in a watertight manner using this insulator.

<Prior art> Conventional insulators for this type of wire connection terminal include:
Products in which the terminal is covered with an insulating jacket and integrated have already been commercialized. However, this conventional device simply covers the wire connection terminal with an insulating jacket.

<Problems to be Solved by the Invention> Therefore, the conventional electric wire connecting terminal connector has a wire clamping part (1a, 11a in the figure) that clamps the bare part k of the end of the electric wire K to be connected, and a covering part (1a, 11a in the figure). 2a, 12a) in Figure 8, making it impossible to maintain watertightness, and also creating a gap (C in Figure 8) between the fitting parts of the male and female insulation covering tubes (2c and 12c in the figure). However, there was a problem that it could not be used in humid places with a lot of water droplets because of the risk of electrical leakage.

In addition, in the case of such conventional products, as mentioned above, there are gaps between the wire clamping part and the covering part that covers it, as well as between the fitted insulation covering tubes, so the wires do not move in the radial direction. External forces received and vibrations transmitted from connected equipment are concentrated on the terminal clamping base of the bare wire portion, that is, the connection base of the terminal clamping part, which causes the wire connection base to weaken and break.

The purpose of the present invention is to solve all of the problems of conventional products at once, and the cover part of the sheathing tube is made large enough to allow the wire clamping part to be easily inserted when inserting the wire connection terminal. After the wire terminals are connected, the wire clamping part and its covering part can be sealed watertightly by the tube that shrinks and deforms so as to come into close contact with the outer circumferential surface of the sheathing part of the wire, and the male and female The present invention proposes a watertight insulating device for a wire connection terminal in which the gap between the extended cylindrical portions can also be kept watertight, and a method for insulating a wire in a watertight manner using the same.

<Means for Solving the Problems> The structure of the present invention for achieving this object will be explained using FIGS. 1 to 9 corresponding to the embodiments. A pair of male and female insulators A and B for inserting and covering a pair of wire connection terminals 1 and 11 formed of a male type and a female type formed so as to make an electrical connection by mating them together.
The wire is passed through the connecting portion 1b and the locking portion 1c of the metal connecting terminal 1, which has the wire holding portion 1a, either the male or female connecting portion 1b, and the locking portion 1c, and the wire is passed through the wire holding portion 1a. The intermediate portion 2b has a small hole 2d formed therein, and the clamping portion 1 of the connecting terminal 1.
The cover part 2a into which a is fitted and the other extension cylindrical part 12
A synthetic resin covering tube 2 in which a male extension cylindrical portion 2c that fits inside the sleeve 2c is formed in a continuous manner on the left and right, and a continuous portion 3a that is adhesively connected to at least the cover portion 2a of the covering tube 2.
and a jacket part 3b that covers the covering part c of the covered electric wire K.
and a heat-shrinkable tube 3 having a heat-fusible resin layer 3c adhered to its inner surface, the male insulator A is fitted with the wire holding portion 11a and the connection portion 1b to establish an electrical connection. An intermediate portion 12b formed with a small hole 12d that allows the connection portion 11b and the locking portion 11c to pass through and prevents the wire clamping portion 11a from passing through the metal connecting terminal 11 having the connection portion 11b and the retaining portion 11c; Clamping part 1 of connection terminal 11
A synthetic resin covering cylinder 12 in which a cover part 12a into which the cylindrical part 1a is fitted and a female extension cylindrical part 12c which is externally fitted into the male extension cylindrical part 2c are formed in a row on the left and right; A heat-shrinkable tube 13 having a continuous part 13a glued and continuous on the covering part 2a, a mantle part 13b covering the covering part c of the covered electric wire K, and a heat-melting resin layer 3c adhered to the inner surface of the mantle part 13b. and an extension cylindrical part 2c of both synthetic resin covering tubes 2, 12,
12c is formed to a length that fits with the mating extended cylindrical parts 12c, 2c when the connecting parts 1b, 11b of the terminals 1, 11 are inserted and fitted together, and these extended cylindrical parts A watertight ring 5 is attached to a portion corresponding to the fitting portion position of the portions 2c and 12c.

In addition, the structure of the insulation method is a method of watertight insulating connection of electric wires using the above-mentioned connecting tool, and a connection between male and female wires in which an electrical connection is made by inserting and fitting each other. A female and male wire having wire clamping parts 1a, 11a for connecting and clamping parts 1b, 11b and bare wire parts k, k of covered wires K, K, and locking parts 1c, 11c located in the middle of these parts to prevent them from coming off. Using a pair of wire connection terminals 1 and 11, covered wires K and K are attached to the wire clamping portions 1a and 11a, respectively.
After connecting the bare wire parts k and k by crimping,
Respective connection parts 1b, 11b and locking parts 1c, 1
1c to male and female insulators A and B, and the insulators A,
The heat-shrinkable tubes 3 and 13 in B are made to protrude from the sides of the heat-shrinkable tubes 3 and 13 through the small holes 2d and 12d to the extended cylindrical parts 2c and 12c, and the locking parts 1c and 11c are used to prevent the tubes from moving backward in the removal direction. After that, the mantle portion 3 in each heat-shrinkable tube 3, 13 is
Male and female insulators A and B are made by heating and shrinking the wires b and 13b, and at the same time melting the hot-melt resin layers 3c and 13c on the inner surfaces of the wires to make them adhere tightly to the covering parts c and c of the electric wires, and which are made in this way. The extension cylindrical parts 2c, 12c and the male and female connection parts 1b, 11b of the connection terminals therein are fitted and connected to each other, and the gap C between the extension cylindrical parts 2c, 12c is sealed with a watertight ring. 5, it is designed to be hermetically closed.

<Function> Since the present invention has such a configuration, for example, the male and female connection terminals 1 and 11 can be connected separately in a motor manufacturing factory and a manufacturing factory of equipment into which this motor is installed. After the bare ends k, k of the electric wires K, K are clamped and connected to the clamping parts 1a, 11a of
Connection part 1 of connection terminals 1 and 11 via d and 12d
b, 11b and the locking parts 1c, 11c are extended into the cylindrical part 2
c, 12c, and in that position, heat-shrink the outer peripheral surfaces of the mantle portions 3b, 13b of the tubes 3, 13 using a heating tool such as a hot gun, and at the same time adhere the hot-melt resin to the inner surfaces of each. By melting the layers 3c, 3c, the outer mantle 3b,
13b is heat-shrinked and brought into close contact with the covering portions c, c of the connecting wires K, K.

In this way, after the motor is assembled into the equipment at the assembly factory or in the assembly process, the 9th
As shown in the figure, the male insulator A and the female insulator B are inserted and connected to each other, and the connection parts 1b and 11b of the internal connection terminals 1 and 11 are connected to the extension cylindrical parts 2c and 12c. It is.

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

1 to 4 are diagrams showing a first embodiment of the present invention. FIGS. 5 to 9 are explanatory diagrams chronologically explaining a method of connecting electric wires using this. Therefore, in this embodiment, the connecting portions 1b and 11b for connecting electric wires are
This is an embodiment of metal connecting terminals 1 and 11 formed into a cylindrical shape and a rod shape that fits into the cylindrical shape. Then,
Both metal connection terminals 1 and 11 are made of copper material,
The external covering tubes 2 and 12 that cover this are injection molded products made of polyvinyl chloride, and the tubes 3 and 13 connected thereto are made of lightly colored nylon products, and the inner surface of the tubes 3 and 12 are made of heat-fused polyamide material layers 3c and 3.
It is made into a double tube shape to which c is glued.
The covering tubes 2 and 12 of the pair of male and female insulators A and B are concentric circles over the entire length and have two cylindrical portions with outer diameters of large and small sizes, and the intermediate portion 2b in the longitudinal direction is connected to the connecting terminals 1 and 11. Small holes 2d, 1 through which the connecting portions 1b, 11b and elastically deformable locking portions 1c, 11c protruding from their bases are inserted.
2d, and on one side there are connection terminals 1,
11 electric wire clamping parts 1a, 11a are internally formed in a series of cylindrical cover parts 2a, 12a, and on the other side, male side and female side extended cylindrical parts 2c, 12c that fit into each other are formed in a continuous manner. It has been done. Further, the tubes 3, 13 are connected with one end side 3a, 13a glued on the small diameter portion of the outer diameter of both the covering tubes 2, 12,
The other end sides 3b, 13b are formed to protrude outward.

In addition, in this embodiment, the male side extension cylindrical portion 2c
A semi-circular annular groove 4 is formed on the outer periphery of the substantially middle portion in the longitudinal direction, and a watertight rubber ring 5 is fitted into the groove 4. Further, the other female side extension cylindrical part 12c has a rubber ring on the inner circumferential surface of the part where the rubber ring 5 is located when the male and female connecting parts 1b and 11b of the connecting terminals 1 and 11 are connected to each other. A shallow arcuate annular groove 14 is formed for receiving 5.

Thus, the wire holding portions 1a of the connection terminals 1 and 11,
Wire connection terminal 1, in which bare wire portions k, k of coated wires K, K are crimped and clamped by 11a, and coated portions c, c are crimped and clamped by coated portion clamping portions 1d, 11d formed on the outer parts thereof. 11 connection parts 1b, 1
1b and the locking parts 1c, 11c are connected to the small holes 2 of the covering tubes 2, 12, respectively, as shown in FIGS.
d and 12d into the extended cylindrical portions 2c and 12c, and elastic expansion of the locking portions 1c and 11c prevents reverse movement in the withdrawal direction, and the cover portions 2a of the covering tubes 2 and 12 , 12a, respectively, and then, as shown in FIGS. 7 and 8, the outer peripheral surfaces of the tubes 3, 13 are heated and shrunk with a heating device such as a hot gun to form a jacket. The parts 3b and 13b are contracted and brought into close contact with the covering parts c and c of the electric wires K and K.

By this heating operation, the hot melt layers 3c, 3c that have been adhered to the inner surfaces of the tubes 3, 13 are melted, and due to the shrinkage pressure of the tubes 3, 13, the covering portions c, c of the electric wires K, K and the tubes 3, 13 are melted. A portion remains between the two and a portion flows out to the outer surface to form lumps 3d, 3d.

In this way, the hot melt resin layer 3
The heat-shrinkable tubes 3 and 13 are connected through the tubes 3 and 3c to cover the tubes 3 and 13 in a series and in a watertight manner.

In this manner, as shown in FIG. 9, the connecting portions 1b and 11b of the wire connection terminals 1 and 11 in the male insulating device A and the female insulating device B are inserted and fitted into each other, and at the same time, Both these connecting parts 1b, 11
Both extended cylindrical portions 2c and 1 located on b and covering these
2c are also fitted into each other, and the gap C between these extension cylindrical parts 2c and 12c is sealed by the compressive repulsion force of the rubber ring 5 fitted on the outer periphery of the male side extension cylindrical part 2c. Let it happen.

By doing this, the electrical connection of the wires can be made easily and completely watertight, without the need for complicated connections such as soldering or wrapping with tape, and also prevents vibrations, etc. It is connected in such a way that it is unlikely to come loose.

In this embodiment, the insertion of male and female insulators A and B into the wire connection terminals 1 and 11 shown in FIGS.
Although it has been explained that the heat adhesion process is performed separately on each side, it goes without saying that the insertion of the insulators A and B and the heat adhesion process may be performed simultaneously when connecting the wire connection terminals 1 and 11. Nor.

The embodiment shown in FIGS. 10 to 13 has extended cylindrical portions 2c and 1 in the covering tubes 2 and 12 corresponding to the male and female covering tubes 2 and 12 shown in the first embodiment.
The shape of each of the cylindrical portions 2c is a rectangular cylinder, and a latching protrusion 6a is formed protrudingly on the outer circumferential surface of one of the cylindrical portions 12c, and the protrusion 6a is formed on the outer circumferential surface of the other cylindrical portion 2c.
It has a structure in which a latching lever 6c, which can be raised and lowered, is protruded and has a latching portion 6b that is latched to the latching lever 6c.

Such a hook 6 is attached to the male and female cylindrical portions 2c, 12.
By forming these cylindrical portions 2c,
When 12c are in the mutually mating position, the 12th
If the hooking portion 6b is hooked to the protrusion 6a as shown in the figure, the two cylindrical portions 2c, 12c will not come off due to vibration etc., and as a result, the inner wire connecting terminals 1, 11 will Connection parts 1b, 11b
The connection state between them can be maintained reliably.

Further, in this embodiment, a stepped portion 7 is formed on the male side cylindrical portion 2c and the outer peripheral portion, and serves as a stopper to regulate the fitting depth when the male side cylindrical portion 2c and the female side cylindrical portion 12c are fitted relative to each other. .

Other points are the same as in the first embodiment.

In the embodiment shown in FIGS. 13 and 14, the connection terminals 1 and 11 shown in the first and second embodiments have a cylindrical shape 1b and a bar shape 11b. As shown, male side connection 1
b is a flat plate made of a copper plate material, and the female side connection part 11b is made of a brass plate material and has a so-called first-stone shape with both sides formed in a half-curl shape.
The extended cylindrical portions 2c and 12c of the covering tubes 2 and 12 that cover the tops of b and 11b are shaped like rectangular tubes.

The heat-shrinkable tubes 3 and 13 are injection-molded high-density polyethylene (HDPE) molded products with enlarged diameter, and polyamide heat-melt resin layers 3c and 3c are bonded to the entire inner surface of the tubes. It was formed.

Other points are the same as in the first embodiment.

The male and female insulators A and B according to the present invention include a covering tube 2,
Males and females were distinguished depending on the diameter of the extended cylindrical portions 2c and 12c in the internal connection terminals 1 and 12, respectively.
Needless to say, the connection portions 1b and 11b of 11 may be distinguished by male and female.

Further, the lengths of both extension cylindrical portions 2c and 12c of the covering tubes 2 and 12 referred to in the present invention are shorter than the lengths of the internal terminal connection portions 1b and 11b, respectively, and the connection between these two connection portions 1b and 11b is made as follows. These extension cylindrical portions 2c, 12 are made long enough to allow direct connection in a bare state at the start of connection.
c may be made to overlap and fit in a small area on the distal end side. In this case, it is sufficient to have a fitting portion that allows the watertight rubber ring 5 to be reliably positioned between both the extended cylindrical portions 2c and 12c. Furthermore, the extended cylindrical portions 2c and 12c may be long on either the male or female side and short on the other side.

The heat-shrinkable tubes 3, 13 and the heat-melting resin layers 3c, 3c referred to in the present invention may be of a double layer of high-temperature nylon and low-melting nylon, in addition to those described in the above embodiments. The hot-melt material formed on the inner layer may be a hot-melt adhesive, and a material that has good adhesion to polyvinyl chloride (PVC), which is generally used as a covering material for electric wires, is particularly suitable.

Furthermore, if the heat-shrinkable tubes 3, 13, including the inner heat-melting layers 3c, 3c, are transparent or translucent, the terminal holding portions 1a,
It is possible to see through the insertion state of 11a, making it convenient to use. In addition, the tube or the covering tube is colored and the connection terminals 1, 1 are inserted into the inside.
1. If you use different colors depending on the electrical capacity and size, you can conveniently use the insertion type without making a mistake.

Although the embodiments considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structure or method of these embodiments.
The present invention can be modified and implemented as appropriate within the scope of having the constituent elements defined in the present invention, achieving the objectives defined in the present invention, and having the following effects.

<Effects of the Invention> As is already clear from the above description, the present invention has the following advantages:
In insulators used with internal wire connection terminals,
The covering tube of the metal terminal for maintaining insulation is formed of an insulating synthetic resin material, and one end of the wire insertion side is made to cover the covering part of the wire,
The covering portion is formed using a heat-shrinkable resin material,
In addition, a heat-melting resin layer is formed on the inner surface,
Furthermore, when the connecting parts of the metal connection terminal are in a connected position, the extended cylindrical parts that cover the connected parts are designed to overlap and fit each other, and at least one of them has a watertight structure that closes the gap between the two extended cylindrical parts. Since the ring is attached, after the male and female connection terminals are inserted and connected, the outer part of the tube is heated and shrunk, and at the same time, the hot-melt resin layer is melted and adhered to the wire sheathing, and the molten resin is applied. By acting as an adhesive and a sealant, it is possible to maintain sufficient watertightness of the clamping part of the electric wire to the connection terminal, and at the same time, the terminal clamping part and the end of the wire sheathing can be kept sufficiently watertight. It is possible to avoid local concentration of vibrations etc. at the base end of the bare electric wire between the
In addition, since the gap created between the extended cylindrical parts of the two covering tubes can be reliably closed in a watertight state by the watertight ring, it can be used in a state where the risk of electrical leakage is extremely low even in a humid atmosphere. At the same time, it has the great advantage of preventing intensive deterioration and damage at the base end of the bare wire due to external vibrations, tensile forces, etc., and ensuring a wire connection condition that can withstand many years of use.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, and FIGS. 1 and 2 are perspective views, and FIGS.
4 is a central longitudinal sectional view, FIGS. 5 to 9 are central longitudinal sectional views sequentially showing the method of the present invention, and FIGS. 10 to 12 are central longitudinal sectional views. Figures 10 and 11 are perspective views, Figure 12 is a central vertical sectional view showing the connected state, Figures 13 and 14.
The figures are a perspective view and a sectional view showing still another embodiment. In the figure, 1 and 11 are connecting terminals, 1a and 11a are holding parts, 1b and 11b are connection parts, 1c and 11c are locking parts, 2 and 12 are covering tubes, 2a and 12a are covering parts,
2b, 12b are intermediate parts, 2c, 12c are extended cylindrical parts, 2d, 12d are small holes, 3 is heat shrinkable tube, 3a, 13a are continuous parts, 3b, 13b are outer mantle parts, 3c is heat meltable Resin layer, 5 is watertight ring, A
denotes a male insulator, B a female insulator, C a gap, K a wire, k a bare wire portion, and c a coated portion.

Claims (1)

[Scope of Claims] 1. A pair of wire connection terminals 1 and 11 consisting of a male type and a female type formed so as to establish an electrical connection by inserting and fitting into each other are inserted and covered. The connecting part 1b and the locking part 1c of a metal connecting terminal 1, which is a pair of male and female insulators A and B, and have a wire clamping part 1a, a male or female connecting part 1b, and a retaining part 1c. Passing electric wire holding part 1a
The intermediate portion 2b has a small hole 2d that does not allow the passage of
and a synthetic resin covering tube 2 in which a covering section 2a into which the holding section 1a of the connection terminal 1 is fitted and a male side extension cylindrical section 2c into which the other extension cylindrical section 12c is fitted are arranged in a row from side to side. and at least the cover portion 2 of the covering tube 2
It consists of a heat-shrinkable tube 3 having a continuous part 3a glued and continuous on a, a mantle part 3b covering the covering part c of the covered electric wire K, and a heat-melting resin layer 3c adhered to the inner surface of the mantle part 3b. The male insulator A is engaged with the connecting portion 11b of the metal connecting terminal 11, which has a connecting portion 11b that fits with the wire holding portion 11a and the connecting portion 1b to establish an electrical connection, and a retaining portion 11c. An intermediate portion 12b formed with a small hole 12d that allows the stop portion 11c to pass through and prevents the wire clamping portion 11a from passing through.
and a synthetic resin covering tube in which a cover portion 12a into which the holding portion 11a of the connection terminal 11 is fitted and a female extension cylindrical portion 12c into which the male extension cylindrical portion 2c is fitted are arranged in a row on the left and right sides. 12, a continuous part 13a adhesively provided on at least the covering part 2a of the covering tube 12, and a mantle part 13b covering the covering part c of the covered electric wire K.
and a heat-shrinkable tube 13 having a heat-fusible resin layer 3c adhered to its inner surface, and an extension cylindrical shape of both synthetic resin covering tubes 2 and 12. In the posture in which the parts 2c and 12c insert and fit the connecting parts 1b and 11b of the terminals 1 and 11 into each other, the mating extended cylindrical part 12c,
2c, and a watertight ring 5 is attached to a portion corresponding to the fitting portion position of these extended cylindrical portions 2c, 12c. 2. A method for watertight insulated connection of electric wires using the watertight insulating device of the electric wire connection terminal according to claim 1, wherein male and female connections are made to electrically connect by inserting and fitting each other. A female and male wire having wire clamping parts 1a, 11a for connecting and clamping parts 1b, 11b and bare wire parts k, k of covered wires K, K, and locking parts 1c, 11c located in the middle of these parts to prevent them from coming off. Using a pair of wire connection terminals 1 and 11, covered wires K and K are attached to the wire clamping portions 1a and 11a, respectively.
After connecting the bare wire parts k and k by crimping,
Respective connection parts 1b, 11b and locking parts 1c, 1
1c to male and female insulators A and B, and the insulators A,
The heat-shrinkable tubes 3 and 13 in B are made to protrude from the sides of the heat-shrinkable tubes 3 and 13 through the small holes 2d and 12d to the extended cylindrical parts 2c and 12c, and the locking parts 1c and 11c are used to prevent the tubes from moving backward in the removal direction. After that, the mantle portion 3 in each heat-shrinkable tube 3, 13 is
Male and female insulators A and B are made by heating and shrinking the wires b and 13b, and at the same time melting the hot-melt resin layers 3c and 3c on the inner surfaces of the wires to tightly adhere them to the covering parts c and c of the electric wires. The extended cylindrical portion 2 in
c and 12c and the male and female connecting portions 1b and 11b of the connection terminals therein are fitted and connected to each other, and the gap C between both the extended cylindrical portions 2c and 12c is hermetically closed by the watertight ring 5. Watertight insulation connection method for electrical wires.