JPH0538583A - Joining method for covered conductor and connecting terminal - Google Patents

Abstract

PURPOSE:To join all of plural pieces of covered conductors to a connecting terminal of a copper or copper alloy plate by a fusing method with high reliability and without generating a connection failure mechanically and electrically. CONSTITUTION:Plural hooks 2 are provided in a connecting terminal 1 formed by bending a copper or copper alley plate. Plural pieces of covered conductors 3 are twisted in advance. The twisted covered conductors 3 are contained in plural hooks 2 of the connecting terminal 1, and thereafter, plural pieces of covered electrodes 3 and the hooks 2 of the connecting terminal 1 are joined by a fusing method for pressurizing the hooks by electrodes 4, 5 and applying a constant current to the electrodes 4, 5 for a prescribed time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention stores a covered electric wire inside a hook of a connecting terminal formed by bending a copper or copper alloy plate and then pressurizes and energizes the covered electric wire with an electrode rod. The present invention relates to a method of joining a covered electric wire electrically connected to a connection terminal and a connection terminal.

[0002]

2. Description of the Related Art A covered electric wire such as an enamel wire is housed in a root of a hook of a connection terminal formed by bending a copper or copper alloy plate, and the hook is pressure-deformed and covered with an electrode rod. Hold the wire, and then apply an appropriate current to the electrode for an appropriate time to thermally destroy the insulation present on the surface of the coated wire to expose the core wire, and then transfer the core wire to a copper or copper alloy plate. There is a joining method by a fusing method for connecting.

After accommodating a plurality of covered electric wires in a hook, the electrodes are pressurized and energized to mechanically and electrically connect the covered electric wires to a copper or copper alloy plate constituting a connection terminal. In the joining method by the fusing method, if a plurality of covered electric wires are simply aligned and bundled, as shown in the cross-sectional view of the joint portion of FIG. 1 out of 3 covered electric wires
If the book becomes improperly joined, or the two covered electric wires 3 cross in the hook 2 as shown in the perspective view of the joint portion in FIG. 5, and the covered electric wire 3 at the intersecting portion is extremely crushed when pressure is applied. ,
There is a problem that the mechanical strength of the covered electric wire 3 is lowered. In addition, in some of the coated wires, even if the insulator existing on the surface is not destroyed or all the core wires are exposed, a state where some of the core wires do not contact with the copper or copper alloy plate occurs. However, there is a problem that a connection failure occurs between some of the plurality of covered electric wires and the connection terminal.

In order to solve such a problem, for example, as disclosed in Japanese Patent Laid-Open No. 53-40890, a plurality of covered electric wires are twisted together and joined to a connecting terminal by the above fusing method. I tried to. However, for example, when 20 coated electric wires were used, some of the coated electric wires had an insulator remaining on the surface, and three of the five samples had poor connection (one (Partial conduction failure) was observed, lacking reliability, and not suitable for practical use.

Further, for example, as disclosed in Japanese Utility Model Publication No. 61-18620, a plurality of hooks are formed on a connection terminal, a plurality of covered electric wires are housed in the plurality of hooks, and a plurality of covered electric wires are accommodated by the above fusing method. Bonding was performed at the points. However, a plurality of covered electric wires are scattered at each hook, and the same problems as described above remain, resulting in lack of joint reliability.

[0006]

As described above,
The above-described method of joining the covered electric wire and the connection terminal has a problem that all the plurality of covered electric wires cannot be joined to the joining terminal without mechanically and electrically causing a defective connection, and the joining reliability is insufficient. ,

The present invention has been made in order to solve the above-mentioned problems, and mechanically and electrically causes a defective connection of all of a plurality of covered electric wires to a connecting terminal made of a copper or copper alloy plate. It is an object of the present invention to provide a method for joining a covered electric wire and a connection terminal, which can be joined with high reliability without being involved.

[0008]

A method for joining a covered electric wire and a connection terminal according to the present invention comprises burning a plurality of covered electric wires together and forming a plurality of hooks on a connection terminal made of a copper or copper alloy plate. The burned coated electric wire is housed in the plurality of hooks, the plurality of hooks are pressed and deformed by the electrode rod to hold the coated electric wire, and the electrode rod is energized to coat the coated electric wire. The electric wire is removed and the covered electric wire is electrically connected to the hook of the connection terminal.

[0009]

In the method for joining a covered electric wire and a connection terminal according to the present invention, a plurality of covered electric wires are twisted together and housed in a hook so that the apparent outer diameter becomes constant and the connection terminal is The connection state between the covered electric wire and the hook of the connection terminal can be obtained at any position in the hook. Also, two or more hooks for accommodating a plurality of covered electric wires are formed on the same terminal, and even if a connection failure occurs at one hook, there are two or more hooks on the same terminal. In either case, the connection state with the covered electric wire can be obtained. Therefore, no mechanical and electrical connection failure occurs between all of the covered wires and the connection terminals,
The reliability of joining can be improved.

[0010]

【Example】

Example 1. FIG. 1 is a perspective view showing an embodiment of a method of joining a covered electric wire and a connection terminal of the present invention, and FIG. 2 is a sectional explanatory view showing a current path by a fusing method. 1 is a connecting terminal made of copper or a copper alloy plate, and in this case, 3
The individual hooks 2 are formed. 3 is a plurality of twisted wires, for example, 2 covered wires, 4 and 5 are electrode rods, 6
Is an electric device in which a covered electric wire formed by twisting a plurality of wires is used. Generally, in order to obtain an appropriate fusing state, the electrode rod has a tapered tip at one end thereof.

Next, the operation will be described. First, Fig. 1
As shown in, a copper or copper alloy plate is die-cut by a press or the like and bent to manufacture a connection terminal 1 in which three hooks 2 for housing the covered electric wire 3 are formed. After accommodating the two covered electric wires 3 which have been twisted in advance at the inner roots of all the hooks 2 at these three positions, the hooks 3 at three positions are sequentially pressed by the electrode rods 4 and 5. The covered electric wire 3 and the hook 2 are joined at all three hooks 2 by the fusing method in which a constant current is applied to the electrode rod for a predetermined time.

After the two twisted covered electric wires 3 and the hooks 2 of the connection terminals 1 are electrically connected by the method as described above, an external lead wire (not shown) is connected to the connection terminal 1 to be electrically connected. The wiring process of the device 6 is completed.

In the conventional method of joining the two covered electric wires 3 by the fusing method without twisting them together, one of the two covered electric wires 3 is used as shown in the sectional view of the joint portion in FIG. When the joint becomes defective, the two covered electric wires 3 cross in the hook as shown in the perspective view of the joint in FIG. 5, and when the current is applied with pressure, the covered electric wire 3 at the intersecting portion is extremely crushed, This causes a problem that the mechanical strength of the covered electric wire 3 is reduced. However, in this embodiment, since the covered electric wires 3 are twisted together, the apparent outer diameters of the two twisted covered electric wires 3 become constant as shown in the cross-sectional view of the joint portion in FIG. A part of the covered electric wire 3 is not crushed extremely, and the width direction 2a of the hook 2 of the connection terminal 1 is further improved.
At any one of the positions, the joined state of the two covered electric wires 3 and the hook 2 of the connection terminal 1 can be obtained. In addition, a connection failure may occur in one of the two covered electric wires 3 when the hook 2 is at one place. Particularly, as the number of the covered electric wires increases, the connection failure may occur in a part thereof. Since there are three hooks 2, the covered electric wire 3 can be connected to any one of the three hooks 2. Therefore, a reliable electric connection between all the plurality of covered electric wires 3 and the connection terminal 1 can be obtained. Can be obtained.

Example 2. Although the method of joining the two covered electric wires 3 to the connection terminal 1 having the three hooks as shown in FIG. 1 has been described in the first embodiment, three or more covered electric wires 3 are joined. Even if it does so, if the twisted covered electric wire 3 has a width of the hook 2 such that a good joining state can be obtained at any position in the width direction of the hook 2, two or more hooks 2 are the same. Connection terminal 1
The same effect can be expected if it is formed.

The wider the joint between the covered electric wire 3 and the hook 2, and the larger the number of the hooks 2, the higher the reliability of the joint, and the connection terminal 1 and the hook to which the covered electric wire 3 is joined. With regard to the shape of 2 and the like, the same effect can be expected if the connection terminal 1 is formed with a hook 2 capable of accommodating a plurality of covered electric wires 3 in a shape suitable for the form of the electric device 6. For example, when 20 covered electric wires were twisted and joined with two hooks, all 5 covered electric wires were electrically connected, and a good joined state was obtained.

Embodiment 3. In the first embodiment, as shown in FIG. 1, two covered electric wires 3 having the same outer diameter are shown, but two or more covered wires in which the covered electric wires 3 having different outer diameters are combined with each other. Even if you connect the wires,
The same effect can be expected.

Example 4. Further, in the first embodiment, the hooks 2 are formed side by side, but even if the hooks 2 are arranged at arbitrary positions according to the form of the electric device 6, two or more hooks 2 are the same. If it is formed on the connection terminal 1, the same effect can be expected.

[0018]

As described above, in the method of joining a covered electric wire and a connection terminal of the present invention, a plurality of covered electric wires are burned together, and a plurality of hooks are attached to the connection terminal made of a copper or copper alloy plate. The coated electric wire that is formed and burnt is housed in the plurality of hooks, the plurality of hooks are pressed and deformed by the electrode rod to hold the covered electric wire, and the electrode rod is energized to cover the covered electric wire. Since the coating is removed and the coated electric wire is electrically connected to the hook of the connection terminal, the coated electric wire which is crossed in the state where the coated electric wires are not twisted is crushed and the tensile strength is extremely lowered, or A connection failure will occur in a part of the covered electric wire with only one hook, but since the covered electric wires are twisted together and a plurality of hooks are formed on the connection terminal, the covered electric wire will not be crushed, Since the connection state between the covered electric wire and the hook can be obtained at any one of the hooks of the connection terminal or at any of the plurality of hooks, all of the plurality of covered electric wires and the connection terminals can be mechanically and electrically A reliable connection can be made and the reliability of the joint is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a method of joining a covered electric wire and a connection terminal of the present invention.

FIG. 2 is a sectional explanatory view showing a current path according to an embodiment of the present invention.

FIG. 3 is a sectional view showing a joined state according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a joined state by a conventional joining method.

FIG. 5 is a perspective view showing a joined state by a conventional joining method.

[Explanation of symbols] 1 connection terminal 2 hook 3 covered electric wire 4 electrode rod 5 electrode rod 6 electrical equipment

Claims (1)

[Claims] 1. A plurality of covered electric wires are burnt together, a plurality of hooks are formed on a connection terminal made of a copper or copper alloy plate, and the burned covered electric wires are stored in the plurality of hooks to form an electrode. The plurality of hooks are pressed and deformed by a rod to hold the covered electric wire, the electrode rod is energized to remove the covering of the covered electric wire, and the covered electric wire is electrically connected to the hook of the connection terminal. The method of joining the covered electric wire and the connecting terminal.