JPS605508Y2 - Structure of wiring connection body - Google Patents

Description

[Detailed description of the invention] The present invention is suitable for processing wires at connection points where wiring terminals such as cables are soldered to device-side terminals that connect them to equipment, such as wiring terminal boards, distribution boards, and component terminals such as connectors. The present invention relates to the structure of such a wiring connection body.

The purpose of this is to create a connection body that can eliminate wire breakage caused by fatigue of the wire due to external mechanical stress applied to the terminal point of the connection, thereby increasing the reliability of device operation. be.

When wiring cables (hereinafter simply referred to as wire rods) that connect the so-called units that make up the device, stress is applied to the wire rods due to dimensional differences with the terminals, especially at the point of soldering connections. It is easy to get affected.

Therefore, regardless of the type and diameter of the wire, it is necessary to take care not to damage the wire itself (such as when peeling off the insulation coating), and to ensure that the wire is not under tension after being connected.

The conventional structure of such a connection point will be explained with reference to FIG.

That is, the figure A in the same figure is a perspective view, and the front view is a longitudinal cross-sectional view of figure A.

In the figure, reference numeral 1 denotes a terminal on the unit side, a cylindrical shape is shown, and a circular recess 3 suitable for the wire diameter is provided inside.

Reference numeral 2 denotes a wire, and its terminal end 4 is carefully stripped and soldered to the recess 3.

5 is an insulating resin heat-shrinkable tube that covers both the terminal and the wire after soldering is completed.

However, even if the heat-shrinkable tube 5 of the outer jacket is in close contact with the terminal 1, if there is a narrow gap 6 between the wire rod 2 and the wire rod 2, the wire rod 2 will be supported only by the adhesive force of the solder, and the reliability of the intended connection will be reduced. I can't go back.

For this reason, a method has been adopted in which adhesive is injected into the narrow peripheral gap 6 and allowed to harden to stabilize the terminal fixation of the wire rod.

The present invention has been made to improve the adhesive filling and fixing method that requires a relatively large number of man-hours in the connection process.

The features of the present invention include at least an inner heat-shrinkable tube that closely covers and covers the wire; The structure of the wiring connection body includes an exterior heat-shrinkable tube that covers the wire, and a wire terminal is secured to the wire to prevent disconnection.

Embodiments of the present invention will be described below with reference to FIGS. 2 and 3.

FIG. 2 is a cross-sectional view of the connecting body 1 having the same terminal shape as that in FIG. 1, when the wire 2, which is the main part of the present invention, is attached to the terminal.

Further, FIG. 3 is a cross-sectional view when the terminal of the wire rod 2 according to the present invention is attached to a lug-type rectangular cross-section terminal 1'.

In the embodiment shown in FIG. 2, two layers of heat-shrinkable tubes 7 and 8 are installed.

That is, for the heat-shrinkable tube 7 on the interior side, a tube with an inner diameter suitable for closely adhering to the outer periphery of the wire rod 2 is selected and inserted, and furthermore, the inner heat-shrinkable tube 7 is inserted in a tube that is in close contact with the outer surface of the tube 7 and the wire rod 2 is inserted. A stretched exterior heat shrink tube 8 is fitted onto the side of the terminal 1 to which the terminal 2 is connected.

When the inner and outer tubes 7 and 8 have a small relative size difference from the illustrated terminal 1 and wire 2, they are covered with double tubes as shown in FIG.

After the tube application, the tubes 7 and 8 are blown with dry air at a temperature of at least 100° C. or higher, which provides inherent thermal dimensional shrinkage, to achieve a tight wire terminal connection.

On the other hand, in the connection terminal part where there is a large dimensional difference between the two (the wire and the terminal), three layers of tubes 7, 8 and 9 are attached as shown in the embodiment diagram in FIG. Terminal locking is performed to hold the wire rod 2 which is contracted.

In short, when there is a large dimensional difference between the outer diameter of the wire and the terminal, complete fixation of the wire is possible by applying double or triple or more shrinkage solidified layers of resin to the outer periphery of the wire to which the terminal is attached at the terminal point of the wire. Become.

According to the above-described structure of the present invention, compared to the conventional work such as resin injection and solidification at connection points, 1) the work time is shortened, (2) reconnection work at the time of repair is easy, and (3)
) There are many advantages such as being able to move the connecting body immediately after the heat shrinkage of the tube is completed, and the practical effects are great.

[Brief explanation of drawings]

FIG. 1 is a perspective view and a sectional view showing the connection structure of a conventional wiring connection body, FIG. 2 is a sectional view showing an embodiment of the present invention, and FIG. 3 is a sectional view of another embodiment. In the figure, 1 and 1' are terminals, 2 is a wire, 7 is an inner heat shrink tube, and 8 is an outer heat shrink tube.

Claims (1)

[Scope of utility model registration request] In the structure of a wiring connection body in which a wire is soldered or connected to a terminal portion, at least a first heat shrink tube that closely covers the wire and covers the wire, and a first heat shrink tube that is in close contact with the first tube and the outer periphery of the terminal. A second layer that also closely covers the surface
A structure of a wiring connection body, comprising: a heat-shrinkable tube;