JP2871366B2 - How to attach the terminal cap to the wire with terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a terminal cap to a terminal-equipped electric wire for covering a terminal attached to an end of the electric wire with a rubber terminal cap for protecting and waterproofing the terminal. .

[0002]

2. Description of the Related Art A terminal cap made of rubber for a terminal at the end of an electric wire has a bag-shaped terminal covering portion 5 which wraps and accommodates a terminal 2 attached to the end of the electric wire 3 as shown in FIG. The rear end of the terminal covering portion 5 is narrowed to form an electric wire insertion portion 6 having a small hole formed therein, and the front end of the terminal covering portion 5 is opened to receive a mating terminal connected to the terminal 2. 7, the electric wire 3 is passed through the electric wire insertion portion 6 and pressed against the outer periphery of the electric wire 3, and the terminal 2 is completely housed and covered in the electric wire covering portion 5.

In order to cover the terminal cap 1 with the terminal 2, see FIG.
Through the wire insertion portion 6 of the terminal cap 1 and temporarily mount the terminal cap 1 slightly backward from the end of the wire, and then attach the terminal 2 to the wire 3 by any means such as crimping.
Then, the terminal cap 1 at the temporary mounting position is shifted toward the end of the electric wire, and the terminal 2 is housed in the terminal covering portion 5.

[0004]

The above-described conventional method of mounting the terminal cap requires the operation of shifting the terminal cap 1 in the temporary mounting posture toward the terminal after crimping the terminal. The terminal cap 1 which presses the wire 3 against the electric wire 3 is forcibly displaced by pinching it with a fingertip, so that it is easy to cause painful fatigue at the fingertip. In addition, it is essential to apply a lubricant to the electric wire 3 to ease the displacing operation. Therefore, there is a problem in that mass production in recent years is lacking because it becomes "sticky" and is bothersome and extremely inefficient. The present invention provides a terminal cap mounting method which solves the above-mentioned drawbacks of the conventional means.

[0005]

The terminal cap mounting method of the present invention for solving the above-mentioned technical problems is described as follows. "The front end of the bag-like terminal covering portion is formed as a terminal insertion port, and the rear end portion is formed as a through wire. When covering the terminal of the wire with the elastic terminal cap that forms the wire insertion portion that is pressed into contact with the terminal at the end of the wire, the terminal cap in which the wire is inserted through the wire insertion portion in advance is set at a temporary mounting position slightly behind the wire end. At the same time, the terminal is attached to the electric wire, and then, air is press-fitted from the terminal insertion opening of the terminal cap in the temporary mounting posture, the terminal cap is elastically expanded, the electric wire is pulled in the expanded state, and the terminal is connected to the terminal. The terminal cap is positioned in the covering portion, and thereafter, the enormous state is eliminated, the terminal cap is restored to its original shape, and the terminal cap is fitted to the terminal.

[0006]

According to the terminal cap mounting method of the present invention described above, air is press-fitted into the hollow portion of the terminal cap temporarily mounted on the electric wire to elastically expand the bag-shaped terminal covering portion. Also, the wire insertion portion that hits the rear end of the terminal enclosing portion also has a diameter-enlarging force that expands the inner diameter, and the inner diameter becomes enormous, so that the current-carrying wire is loosely fitted, or the degree of pressure contact with the wire And a state in which electric wire slips easily. Therefore, when the electric wire is pulled in the expanded state, the electric wire is relatively easily moved relative to the electric wire insertion portion and pulled out, and the terminal can be positioned in the terminal covering portion of the terminal cap in the enormous posture. Then, if the terminal cap is automatically elastically contracted and restored to its original shape by resolving the enormous state, the terminal at the end of the wire can be a terminal cap-attached wire in which the terminal cap is fitted in a normal posture.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. That is, a terminal cap 1 made of rubber and having a bag-shaped terminal covering part 5 having a hollow part 4 with a rectangular cross section shown in FIG. 3 as a main part is covered on a terminal 2 attached to an end of the electric wire 3. When the terminal 2 is completely housed in the terminal covering portion 5 and the electric wire 3 is inserted into the terminal insertion portion 6 and pulled out, the air delivery pipe 8 protrudes from the base 10 as shown in FIG. And the air delivery pipe 8
The terminal cap 1 was mounted on the electric wire 3 by the following procedure using a mounting jig 14 having a shape in which the tip 9 of the terminal cap 7 was fitted into the terminal insertion opening 7 of the terminal cap 1 in an airtight manner and held.
In addition, 11 in the figure is an air adjusting valve of the air delivery pipe 8.

First, the electric wire is passed through the electric wire insertion hole 6 of the terminal cap 1, and the terminal cap 1 is temporarily mounted from the end of the electric wire at a position slightly behind the working space required for crimping the terminal 2. Then, the terminal 2 is crimp-connected to the electric wire 3 to form a terminal-attached electric wire 12 temporarily attached to the terminal cap. Then, the terminal-attached electric wire 1 temporarily attached to the terminal cap
2 is inserted into the hollow portion 13 of the air delivery pipe 8 of the mounting jig 14, and the terminal insertion port 7 of the terminal cap 1 at the temporary mounting position is fitted to the air delivery pipe 8 to be air-tightly connected.
Hold it with your fingertips so that it does not come off.

Thereafter, air is press-fitted from the air delivery pipe 8 in the holding posture to elastically expand the hollow portion 4 of the terminal cap 1, and in the expanded state, the electric wire 3 extending rearward from the terminal cap 1. , The terminal 2 is pulled into the terminal covering portion 5, and the rear end 2 </ b> A of the terminal 2 is brought into contact with the wire insertion portion 6. Then, the air delivery of the air delivery pipe 8 is stopped, and the terminal cap 1 is detached from the air delivery pipe 8 to eliminate the enormous state, and the terminal 2 is housed in the terminal cap 1 restored to its original shape by elastically reducing to a free state. As a result, the electric wire 13 with the terminal properly mounted on the terminal cap was formed. The above-described embodiment has the above-mentioned action, and it is extremely easy to pull out the electric wire 3 when the terminal cap 1 is in an enormous state without applying a lubricant to the electric wire, and to fit the terminal cap 1 to the terminal 2. Can be efficiently and continuously produced.

[0010]

As described above, according to the method of mounting the terminal cap to the terminal-equipped electric wire of the present invention, the front end of the bag-shaped terminal covering portion is used as the terminal insertion port, and the rear end portion is connected to the current-carrying wire. When fitting the elastic terminal cap that forms the wire insertion part that is pressed into contact with the terminal at the end of the wire, conventional fatigue-prone manual work and "sticky" lubricant application work are unnecessary, and workability is greatly improved. At the same time, the working efficiency is improved, and there is an effect of improving the productivity of forming electric wires with terminal caps with the recent mass production suitability.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a method of attaching a terminal cap to a terminal-attached electric wire according to an embodiment of the present invention.

FIG. 2 is a perspective view of a mounting jig used in the terminal cap mounting method of the embodiment in FIG. 1;

FIG. 3 is a perspective view of a terminal cap attached to an electric wire with a terminal.

FIG. 4 is an explanatory view of a method of attaching a terminal cap to a conventional electric wire with a terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal cap 2 Terminal 3 Electric wire 4 Hollow part 5 Terminal wrapping part 6 Wire insertion part 7 Terminal insertion port 8 Air delivery pipe 9 Tip of air delivery pipe 10 Units 12 Wire with terminal for temporary installation of terminal cap 13 Normal connection of terminal cap Wire with terminal 14 mounting jig

Continued on the front page (58) Fields investigated (Int. Cl. ⁶ , DB name) H01R 43/20 H01R 4/22 H01R 4/70 H01R 13/44 H01R 13/52 H01R 43/00 H01B 17/58

Claims (1)

(57) [Claims] 1. An elastic terminal cap, which forms a front end of a bag-shaped terminal covering portion as a terminal insertion opening and a rear end portion of a wire insertion portion for press-contacting a through wire, covers the terminal at the wire end. When attaching the terminal cap, the terminal cap in which the electric wire has been inserted through the electric wire insertion portion is set at a temporary mounting position slightly behind the end of the electric wire and the terminal is attached to the electric wire. Pressurized air from the terminal cap to elastically expand the terminal cap, draw the electric wire in the expanded state, position the terminal in the terminal covering portion, and then eliminate the expanded state and remove the terminal cap. A method of attaching a terminal cap to a terminal-equipped electric wire, wherein the terminal cap is restored to its original shape and the terminal cap is fitted to the terminal.