JPH01217876A - Water-tight insulating equipment of wire-connecting terminal and water-tight insulating connection of wire - Google Patents

Abstract

PURPOSE:To improve water-tightness and prevent cutting of a wire connecting base part by a method wherein a coated part of the wire is covered using a thermocontacting resin material at one edge part on the wire insulating side and a thermomelting resin layer is formed in the inside, further the extended cylindrical parts covering a connection part are mutually piled up and fitted and a water-tight ring blocking a gap between both extended cylindrical parts is mounted. CONSTITUTION:The connecting parts 1b, 11b and the engaging parts 1c, 11c of the wire connecting terminals 1 and 11 are made to protrude into the extended cylindrical parts 2c and 12c through the small holes 2d and 12d of the coated cylinders 2 and 12 respectively for checking a reversed movement of the engaging parts 1c and 11c by means of elasticity. Next, the peripheries of the thermocontacting tubes 3 and 13 are heated and contracted with a heating equipment, and simultaneously the thermomelting resin layers 3c and 3c stuck on the respective insides are melted, while the jacket parts 3b and 13b are heated and contracted for being tightly stuck on the coated parts c and c of a connecting wire. Further, the extended cylindrical parts 2c and 12c covering over a connecting part are mutually fitted into and a water-tight ring 5 blocking a gap is fitted to these extended cylindrical parts.

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> Conventionally, as an insulator for this type of electric wire connection terminal, a reed product in which a terminal is covered with an insulating coating tube and integrated is manufactured. However, this conventional device simply covered the wire connection terminal with an insulating jacket.

<Problem to be solved by the invention> Therefore, the conventional electric! The connecting tool for the ita connection terminal is an electric wire (K) that holds the bare end (k) of the wire (K) to be connected.

A gap is created between the holding part (1m, l1a in the figure) and its covering part (2a, 12a in the figure), making it impossible to maintain watertightness, and the male and female insulation myi+! cylinder (2c, in the figure) 12c) There was also a gap (C in Figure 8) between the mating parts, making it impossible to maintain watertightness, so it could not be used in humid locations with a lot of water droplets due to the risk of electrical leakage. There was a problem.

In addition, in 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 exposed1
There was a problem that the electric wire connection base was weakened and cut because the wire was applied intensively to the terminal clamping base of the $cn portion, that is, the connection base of the terminal clamping part.

The present invention solves various problems of such conventional products. With the aim of solving the +1M point all at once, 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, but after the wire terminals are connected to each other, The wire clamping part and its covering part can be brought into close contact with each other in a watertight manner by means of a tube that shrinks and deforms so as to come into airtight contact with the outer peripheral surface of the covering part of the wire, and the gap between the male and female extended cylindrical parts is also made watertight. The present invention proposes a watertight insulator for an electric wire connection terminal that can maintain its shape, and a method for insulating an electric wire watertight 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 wire connection terminals (1) and (11) made of a sulfur type and a female type formed so as to make an electrical connection by mating are inserted and covered.
A pair of male insulators (A), CB) with a wire clamping part (
An electric wire is passed through the connection part (1b) and the locking part (1c) of a metal connection terminal (1) having either the connection part (111) of the metal connection terminal (1a) and the locking part (1c). An intermediate part (2b) formed with a small hole (2d) that does not allow the clamping part (1m) to pass through, a cover part (2&) that covers the clamping part (1a) of the connection terminal (1>), and the other extended cylindrical part. (2) made of synthetic resin, in which a male extension cylindrical part (2c) that fits inside the part (12c) is cast from side to side; and the covering cylinder (2).
At least a step part (
3g), a jacket part (3b) that covers the covering part (c) of the covered wire (K), and a hot-melt resin layer (
3c) and a heat-shrinkable tube (3) having a connecting part (11b) that fits into the male end to make an electrical connection, and a locking part (11c) to prevent slipping off! The connecting part (11b) and the locking part (I1c) in the jL connecting terminal (11)
), a middle part (12b) having a small hole (12cl) through which the wire clamping part (11a) does not pass, and a cover part (12cl) into which the clamping part (1ba) of the connection terminal (11) is fitted.
12a) and a female side extension cylindrical part (12c) that fits onto the male side extension cylindrical part (2c), which are formed by casting from side to side, and the covering cylinder (12). A mantle part (13b) that covers at least the covering part (2a) of the continuous throw part (13m) and the covering part (c) of the covered electric wire (K).
) and 1 liter of mature melting resin (3
c) and a heat-shrinkable tube (13) having
i-side insulator (B), and an extension cylindrical part (2c) of these resynthetic resin covering tubes (2) and (12).
, (IZc) is the connection part (1) of terminals (1) and (11)
b), (11li) are formed to a length that fits together with the mating extension cylindrical parts (12c), (2a) when inserted and fitted into each other, and these extension cylindrical parts (Zc
), the watertight ring (5) is attached to a portion corresponding to the fitting portion position of (12c).

In addition, the structure of the insulation method is a method of watertight insulation connection of electric wires using the above-mentioned connecting tool, and the male and female connecting parts ( ib).

(ITo) To RFT electric AI (K), (K) (71 Electric wire clamping part (1
a) , (l1m) and a locking part (jc) located in the middle of these to prevent it from coming off.

(11c) A pair of female and male electric wire connection terminals (1).

Using (11), the corresponding electric 1! Clamping part (1m), (1
1 ugly) and the bare wire part (K) of the covered wire (K) and (K), respectively.
It) and (k) are connected by crimping and clamping, and then the respective connection parts (11I) are formed.

(ITo) and the locking parts (1c) and (11c) as male and female insulators (A).

(B), a small hole (2cl) from the heat-shrinkable tube (3) and (13) side of the insulator (A) and (B);
(12tj) through the extended cylindrical part (2c), (12
c) The locking portions (Ic) and (11c) are used to prevent the tubes from moving backwards in the removal direction, and then the jacket portion <3b of each heat-shrinkable tube (3) and (13) is attached. ), (13b) are heated and shrunk, and at the same time, the hot-melt resin layer (3c) on the inner surface is melted and adhered to the covering part (c), (c) of the electric wire, and in this way. The extension cylindrical portions (Ze) and (12c) in the male and female insulators (A) and (B) and the male and female fa connection portions (To) of the connecting terminals inside the same, (
11b> are mutually fitted and connected, and the re-extended cylindrical part (
2c) and (12c) with a watertight ring (
5) to achieve tight occlusion.

Since the present invention has such a configuration, for example, in a motor manufacturing factory and an A-device manufacturing factory in which this motor is installed, male and female connection terminals (1), <11), each holding part (1m), (l1
After clamping and connecting the bare ends (k) and (k) of the electric wires (ni) and (ni) to m), connect the respective synthetic resin jacket tubes (
2), the middle part (2b) of (12).

(12b) and the connecting terminal (1) through the small hole (2d), (12d).

(11) connecting parts (, 1b), (1113) and locking part (
i, e, , (lie) extended cylindrical part (2c), (12
c) protrude the tube (3) in that position;
, (13), the outer peripheral surfaces of the mantle portions (31+) and (131+) are heated and shrunk using a heating device such as a bot gun, and at the same time, the hot-melt resin layers (3c) and (3c) are bonded to the inner surfaces of each. ), the mantle parts (3b), (131+) are heat-shrinked through the hot melted resins N (3a), (3c), and the covering parts ( of the connecting wires (K), (K) are c) and (c).

In this way, after the motor is assembled into the A11 unit at the assembly factory or in the assembly process, the male side insulator (A) and the female side insulator ([1) are connected to each other as shown in Figure 9. The connection parts (1b), (ITo) of the internal connection terminals (1), (11) and the extension cylindrical parts (2c), (
12c).

<Example> Embodiments 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 the method of connecting electric wires using this. A metal connecting terminal (1) is formed in which (11b) is formed into a cylindrical shape and a rod shape that fits into the cylindrical shape. , (11
). These two metal connection terminals (1).

(11) is made of material and covers the outer covering cylinder (2).

(12) is an injection molded product made of polyvinyl chloride, and the tubes (3) and (13) connected to this are light-colored nylon products, with heat-melted layers of polyamide material (3c) and (3c) on their inner surfaces. ) is glued into a double tube shape. Therefore, a pair of male and female insulators (A)
, (B) [(2), (12) is a cylindrical part with a circular shape corresponding to the entire length and two steps of large and small outer diameters, and the intermediate part (21+) in the longitudinal direction is connected to the connecting terminals (1), (11). ), the connecting portions (1b) and (11b) and an elastically deformable locking portion (1a) formed protruding from the base thereof to prevent slipping off.

(11c) and small holes (2d) and (12d
), and the connection terminals (1) and (1
A cylindrical cover portion (2a) that houses the electric wire 1 holding portions (1a) and (11a) of 1).

(12a) are formed in series and the male side and the other side are mutually fitted.
The female side extension cylindrical parts (2c) and (12c) are formed in a row. Further, the tubes (3) and (13) are connected with one end (3m) and (13m) glued onto the small diameter portion of the outer diameter of the double-wave cover tubes (2) and (12). , the other end sides (31+) and (131+) are formed to protrude outward.

In addition, in this embodiment, the male extension cylindrical part (Zc) has a semi-circular annular groove (
4), and a watertight rubber ring (5) is fitted onto the arm (4). In addition, the other female side extension cylindrical part (
12c), the male and female connecting portions (1b) and (ITo) of the connecting terminals (1) and (11) are connected to each other, and a rubber ring is provided on the inner circumferential surface of the portion where the rubber ring (5) is located. The ring (5) holder is a shallow arc-shaped annular 7M (
14) is the formation.

Therefore, the electric currents of connection terminals (1) and (11)! Holding part (1
m).

W hit by (l1m)! Wire (K), bare wire part of (K) (
k) and (k) are crimped and clamped, and the sheathing parts (C) and (c) are crimped and clamped by the sheathing clamping parts (1cl) and (11tJ) formed on the outer part of the wire connecting terminal (
1) and (11), and the connecting portions (1b) and (11b) and the locking portions (1c) and (11c) are connected to the covering tube (2), respectively, as shown in Fig. 5-6.

(12) through the small hole (2(1), (121)) and the extended cylindrical part (2c).

(IZc) and locking parts (1c), (lie)
The covering portion (2a) of the covered Fj[III (2), (12) is prevented from moving backward in the withdrawal direction by elastic expansion of the cover portion (2a).

(12i+) holds the connecting terminals (1) and (11) (
After that, as shown in Fig. 7.8, the outer peripheral surfaces of the tubes (3) and (1B) are heat-shrinked using a heating device such as a pot gun to form a mantle (3b).

(13b) is contracted and brought into close contact with the covering portions (,) and (C) of the electric wires (K) and (ni).

Through this heating operation, the hot melt layers (3c), (3c) were bonded to the inner surfaces of the tubes (3), (13).
melts and becomes electric wire (K) due to the contraction pressure of tube <3) and (13).

Covering part (,), (C) of (in) and dupe (3), (1
3), a part remains between the
), forming (3tl).

In this way, the ends of the T4 wire coatings (C), (c) located in the coating tubes (2), (12) and the terminals (1), (1
A heat-shrinkable tube (3) is connected between the sandwiching part (1a) of 1) and the end of (l1m) via heat-meltable resin layers (3c) and (3a).

In step (13), TItff is performed in a series and in a watertight manner.

In this way, as shown in FIG. 9, the wire connection terminals (
At the same time, the connecting parts (1b) and (11b) of 1) and (11) are inserted and fitted into each other, and at the same time, both the connecting parts (1b) and
11b) Re-extension cylindrical part (2c) located above and covering these
, (12c) are also fitted into each other, and these re-extended cylindrical parts (2c) are re-extended by the compressive repulsive force of the rubber ring (5) fitted on the outer periphery of the male side extended cylindrical part (2c).

The gap (C) between (12c) is made dense.

By doing this, the electrical connection of the electric wire can be made easily and completely watertight, without the need for complicated connections such as soldering or dab wrapping, and the connection can be disconnected due to vibration, etc. It connects to a state with less.

In this example, the electric wire connection terminal (
1) Insertion of male and female insulators (A) and (B) into (11), electric wires (on) of tubes (3) and (13), and covering parts (c) and (,) of (K) Although it was explained that the heat adhesion processing on the top was performed separately, these insulators (A) and (B)
The insertion and heat bonding process is done using the TA connection terminal (1).

It goes without saying that (11) may be performed simultaneously when connecting.

The embodiment shown in FIGS. 10 to 13 has a covering f! corresponding to the male and female covering tubes (2) and (12) shown in the first embodiment. 4 (2), (12) extension cylindrical part (
2c) and (12c) each have a rectangular cylindrical shape, and a latching protrusion (6a) is formed protrudingly on the outer peripheral surface of one of the cylindrical parts (12c), and the other cylindrical part (2c) It has a structure in which a latching lever (6c) that can be raised and lowered and has a latching portion (6b) that latches with the protrusion (6m) is formed protruding from the outer peripheral surface of the holder.

Such a hanging body (6) is used as a male and female cylindrical part (2c).

(12c), these cylindrical parts (2
c) and (12c) (when they are in the mutually fitted position, the latch part (61) is attached to the protrusion (6a) as shown in FIG.
+), both of these cylindrical parts (2c).

(12c) will not come off due to vibration, etc., and the connected state between the connecting parts (1b) and (11b) at the internal wire connection terminals (1) and (11') can be maintained reliably. .

In addition, in this embodiment, a step part ( ) is formed on the outer circumference of the male side cylindrical part (2c) to serve as a stopper when relative fitting with the female side cylindrical part (12a), and to control the fitting depth. It is intended to be regulated.

Other points are the same as those in the first embodiment.

The embodiment shown in FIGS. 13 and 14 is similar to the embodiment shown in FIGS. Instead of the connection terminals (1) and (11) shown in the second embodiment having a cylindrical shape (1b) and a rod shape (11b), the male side connection is made as shown in FIG. The part (1b) is a flat plate made of copper plate material, and the female side connecting part (11b)
is made of brass plate material and has a so-called faston shape in which both sides are formed in a semi-curled shape, and both connecting parts (1b) and (11b)
Covering tube (2) that covers the top.

Extension cylindrical part (2c) in (12), (12c)
is shaped like a rectangular cylinder.

The heat-shrinkable tubes (3) and (13) are injection-molded high-density polyethylene (+-1
DPE) This is an enlarged diameter crystal of a molded product, and polyamide hot-melt resin 79 (3c), (3e) is adhesively formed on the entire inner surface.

Other points are the same as in the first embodiment.

The male and female insulators (A) and (B) according to the present invention are the covering tubes (2
), the extension cylindrical part (2e) in (12), (12)
Males and females were distinguished by the size of the diameter of c), and the connecting parts (1b) and (11b) of the internal connecting terminals (1) and (11)
) It goes without saying that they can be distinguished by male and female.

Furthermore, the lengths of the re-extended cylindrical portions (2c) and (12c) in 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). Both of these connecting portions (To), ml+) are made long enough to be directly connected in a bare state at the start of connection, and both of these extension portions (2c).

(12c) may be made to be double-fitted in a small area on the tip side. In this case, the watertight rubber ring (
It is only necessary that there be a fitting portion sufficient to ensure that 5) is located between the re-extended cylindrical portions (2c) and (12c).

Moreover, these re-extension cylindrical parts (2c) and (12c) may be long on either side of Zhao Xiong and short on the other side.

The heat-shrinkable tubes (3), (13) and the heat-melting resin layers (3c), (3a) according to the present invention are made of high-temperature nylon and low-temperature melting nylon, in addition to those explained in the above embodiments. It may be a double-layered material, and the hot-melting material formed on the inner layer may be a hot-melting adhesive, especially when used with polyvinyl chloride (PVC), which is commonly used as a covering material for electric wires. Materials with good adhesive properties are suitable.

In addition, if the heat-shrinkable tubes (3) and (13), including the inner heat-melting layers (3c) and (3e), are transparent or translucent, the terminal holding portion (111) inside )
, (l1m) can be seen through, making it convenient to use. Furthermore, if the tube or covering cylinder is colored and the connection terminals (1) and (11) are of different colors depending on the electrical capacitance 1 and size of the connecting terminals (1) and (11) to be inserted into the interior, it can be conveniently used without making a mistake in the type of insertion.

Although the embodiments considered to be representative of the present invention have been described above, the present invention is not necessarily limited to these embodiments and methods. The present invention can be modified and implemented as appropriate within the scope of achieving the purpose of the invention and having the following effects.

<Effects of the Invention> As is already clear from the above description, the present invention, in an insulator used with a T4n connection terminal inside, uses a synthetic resin material with insulating properties to cover the metal terminal for maintaining insulation. The coating is made of a heat-shrinkable resin material, and the coating is made of a heat-shrinkable resin material, and a fully meltable resin layer is provided on the inner surface so as to cover the coating of the wire at one end on the wire insertion side. Form and even gold! When the connecting parts of the jt connection terminal are in a connected position, the extension cylindrical parts that cover the connection parts overlap and fit each other, and at least one of the extension cylindrical parts has a watertight ring that closes the gap between these re-extended cylindrical parts. 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 coating, and the molten resin is applied to the wire. By acting as both an adhesive and a sealant, it is possible to maintain sufficient watertightness at the part where the wire is held to the connecting terminal, and at the same time to prevent bare parts between the terminal holding part and the end of the wire sheathing. Local concentration of vibrations, etc. at the base end of the electric wire can be avoided, and the gap created between the extended cylindrical parts of the two covered rR cylinders can be reliably closed in a watertight state by the watertight ring. Therefore, it can be used in a humid atmosphere with extremely low risk of electrical leakage, and at the same time prevents intensive deterioration and damage due to external vibrations and tensile forces at the base end of the bare wire, making it easy to use for many years. It has the great advantage of being able to compensate for wire connection conditions that can withstand.

[Brief explanation of the drawing]

1 to 4 show 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 cross-sectional view showing the method of the present invention sequentially, and FIGS. 10 to 12 show other embodiments. i is a perspective view, FIG. 12 is a central vertical sectional view showing a connected state, and FIGS. 13 and 14 are perspective views and sectional views thereof showing still other embodiments. In the figure, (1) and (11) are connection terminals, (1m), (l1m
) is the clamping part, (1b) and (11b) are the connecting part, (1
c) , (lie) are locking parts, (2), (12) are 7W tubes, (2a), (12a) are cover parts, (2b). (12b) is the middle part, (2c) and (12c) are the extended cylindrical parts, (2d) and (12d) are the small holes, (3) is the heat-shrinkable tube, and (3m). (13m) is a continuous part, (3b), (13b) is a mantle part, (3c) is a hot-melt resin layer, (5) is a watertight ring,
(A) shows a male insulator, (B) shows a female insulator, (C) shows a gap, (K) shows an electric wire, (k) shows a bare electric wire part, and (0) shows a covered part. Figure 5 Figure 9 Figure 10 Figure 11 Figure $13

Claims (1)

[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 each other into each other. A pair of male and female insulators (A) and (B) covering the wire holding part (1
a), either the male or female connection part (1b), and the locking part (
1c) in the metal connecting terminal (1), and the wire holding part (1c) is passed through the connecting part (1b) and the locking part (1c).
The middle part (2d) is formed with a small hole (2d) that does not allow the passage of
b), a cover part (2a) into which the holding part (1a) of the connection terminal (1) is fitted, and a female side extension cylindrical part (2c) into which the other extension cylindrical part (12c) is fitted. A synthetic resin sheathing tube (2) formed in a continuous manner on the left and right, a continuous portion (3a) adhesively connected on at least the covering portion (2a) of the sheathing tube (2), and a covering portion of the covered electric wire (K). (c) Mantle part (3b) that mantles the upper part.
and a heat-shrinkable tube (3) having a heat-fusible resin layer (3c) adhered to its inner surface.
), a connecting part (11b) that fits into the wire holding part (11a) and the connecting part (1b) to establish an electrical connection, and a locking part (11c) to prevent slipping off. an intermediate part (12b) formed with a small hole (12d) that allows the connecting part (11b) and the locking part (11c) to pass through and prevents the wire clamping part (11a) from passing through; and a clamping part of the connection terminal (11). (11a) is fitted into the cover part (12a) and the female extension cylindrical part (12a) is fitted externally into the male extension cylindrical part (2c).
c) Synthetic resin covering tube (12) formed in a row on the left and right
and a connecting part (13a) adhesively connected to at least the covering part (2a) of the covering tube (12), a mantle part (13b) covering the covering part (c) of the covered electric wire (K), and the mantle part (13b). and a female insulator (B) consisting of a heat-shrinkable tube (13) having a heat-meltable resin layer (3c) adhered to the inner surface, and both of these synthetic resin covering tubes (2) , (12) extension tubular parts (2c), (12c) are the terminals (1), (11)
When the connecting parts (1b) and (11b) are inserted and fitted into each other, the extension cylindrical parts (12c) and (2c) of the other party are inserted and fitted together.
A wire connection terminal is formed to a length that fits together with the extended cylindrical portions (2c) and (12c), and a watertight ring (5) is attached to a portion corresponding to the fitting portion position of the extended cylindrical portions (2c) and (12c). watertight insulation. [2] A method for making a watertight insulated connection of electric wires using the watertight insulator of the electric wire connection terminal according to claim [1], wherein a male and a female are inserted into each other to make an electrical connection. connection parts (1b), (11b) and covered wire (K)
, (K), wire clamping parts (1a), (11a) that connect and clamp the bare wire parts (k), (k), and locking parts (1c), (1c), located in the middle of these parts, to prevent them from coming off. Using a pair of male and female electric wire connecting terminals (1) and (11) having the same wires as shown in FIG. , (k) are connected by crimping and clamping, the respective connection parts (1b) and (11b
) and the locking parts (1c), (11c) using male and female insulators (A
), (B), the small hole (2d), (
12d) to protrude toward the extended cylindrical portions (2c) and (12c), and are installed with the locking portions (1c) and (11c) preventing it from moving backward in the pulling direction, and then each heat-shrinkable tube The mantle (3b) in (3) and (13)
), (13b) are heated and shrunk, and at the same time, the hot-melt resin layers (3c), (3c) on the inner surface are melted and adhered to the covered parts (c), (c) of the electric wire, and The extension cylindrical parts (2c) and (12c) of the male and female insulators (A) and (B) and the male and female connection parts (1b) and (11b) of the connection terminals therein are connected to each other. A watertight insulated connection method for electric wires, in which the electric wires are fitted and connected to each other, and the gap (C) between both extended cylindrical portions (2c) and (12c) is hermetically closed with a watertight ring (5).