JP2629008B2 - Wire crimping method and tool used for its implementation - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for pressing an electric wire against a contact fitting inserted and fixed in a connector or the like, and a tool used for carrying out the method.

(Background technology)

For example, as shown in FIG. 7, the connector 6 for simultaneously connecting a plurality of wirings has a contact fitting 3 inserted and fixed in a housing 7. An electric wire 5 is connected to the contact fitting 3 by pressure welding. This pressure welding is performed using, for example, an electric wire pressure welding tool as shown in FIG. 8 before inserting and fixing the contact fitting 3 into the housing 7. As shown in the figure, this wire pressure welding tool 1
Has a U-shaped configuration in which a lever 12 is attached to one end of an L-shaped main body 11 so as to be freely opened and closed. A guide 13 is embedded in the inner corner of the main body 11 so as to be flush with the main body 11. On the surface of the guide 13, a groove serving as the contact storage portion 14 is formed. When the lever 12 is operated, the press-contact punch 15 protrudes and retracts in the contact storage section 14.

Using the electric wire pressure welding tool 1, the electric wire is pressed against the contact fitting by the following method. One of the plurality of contact fittings 3... Connected by the carrier part 2 is cut off and fitted into the contact storage part 14 of the wire pressure welding tool 1. By inserting the tip of an electric wire (not shown) between the contact fitting 3 and the press-fitting punch 15, closing the lever 12 and pressing down the press-fitting punch 15, the wire is pressed against the contact fitting 3.

However, such a method has a problem in that the contact fitting is easily deformed when the contact fitting 3 is cut off from the carrier section 2 or the like. Further, when the contact fitting 3 is broken off, a finger or the like touches the contact portion 3a of the contact fitting 3, so that dirt or the like may adhere to the contact portion 3a, and there is a problem that the contact reliability is easily impaired.

[Object of the invention]

In view of the above, the present invention provides a wire pressure welding method capable of reducing deformation of a contact fitting and preventing a finger or the like from touching a contact portion of the contact fitting, and implementing the method. An object of the present invention is to provide an electric wire pressure welding tool used for the above.

[Disclosure of the Invention]

In order to achieve the above object, a first aspect of the present invention uses an electric wire pressure welding tool in which a press-contact punch is protruded and retracted in a contact storage portion by operating a lever, and the press-contact punch is inserted into the contact fitting fitted into the contact storage portion. In an electric wire pressure welding method in which electric wires are pressed with a punch, among a plurality of contact metal fittings which are spaced apart from each other and whose ends are connected to a single carrier portion, the earliest contact metal fitting is replaced with a contact storage portion of the wire pressing tool. Fitting the other contact fitting into a space disposed adjacent to the contact storage portion, and arranging a carrier portion in the contact storage portion and a side space of the space; and Pressing the electric wire with the press-fitting punch to the contact fitting fitted in the contact fitting; While fitting retained in tact housing portion, moving the other contact metal and the carrier portion, and a step of taking folding a contact metal fitting the electric wire is pressed from the carrier unit.

According to a second aspect, a contact storage portion is provided in the main body,
In the electric wire pressing tool, a press-contact punch is protruded and retracted to the contact storage portion by a lever operation, and a contact fitting fitted in the contact storage portion is pressed against an electric wire by the press-contact punch. A contact storage portion in which the earliest contact metal fitting is separately fitted from other contact metal fittings and the carrier portion among a plurality of contact metal fittings having an interval and an end connected to one carrier portion; When the earliest contact metal fitting is placed in the contact storage portion, another contact metal fitting of the contact metal fitting group is housed, and the earliest contact metal fitting is the contact metal. Allows rotation of other contact fittings together with the carrier part while being fitted and held in the storage part. And a that void.

Hereinafter, these inventions will be described in detail with reference to the drawings showing the embodiments of the second invention.

FIGS. 1 (a) and 1 (b) show an embodiment of a wire pressure welding tool according to the second invention. As shown in these figures, the electric wire pressure welding tool 4 has a horizontal U-shape in which a lever 12 is axially attached to one end of an L-shaped main body 41. lever
The unit 12 opens and closes with respect to the main body 41 by rotating about a rotation shaft 16 attached to the one end of the main body 41. The guide 13 is embedded in the inner corner of the main body 41 on the side facing the lever 12 so as to be flush with the main body 14.
On the surface of the guide 13, a groove serving as the contact storage portion 14 is formed. The contact storage portion 14 extends in a direction crossing the main body 41. A shaft 18 is provided integrally with the press-contact punch 15, and the shaft 18 is rotatably supported by the lever 12. When the lever 12 is opened and closed, the lever 12 rotates around the shaft 18 and the press-contact punch 15 reciprocates. As a result, the press contact punch 15 is
Haunting. That is, when the lever 12 is closed, the press-contact punch 15 advances into the contact storage portion 14 and the lever 12
Is opened, the press-contact punch 15 retreats from the inside of the contact storage portion 14. It is preferable that the press-contact punch 15 be guided by the punch guide 17 provided on the main body 41 so that the operation is stable. Lever 12
It is convenient if is biased to open when closed. This biasing is performed by, for example, a torsion coil spring inserted into the rotating shaft 16.

A space 411 is provided in a portion of the main body 41 beside the guide 13,
The first side wall is provided as a notch that is partially cut away. As shown in FIG. 3, when the first contact fitting 3 of the group of contact fittings 3... Connected by the carrier section 2 is fitted into the contact storage section 14, The tips of the contact fittings 3 are received. Moreover, when the forefront contact fitting 3 is cut off from the carrier portion 2 by using the holding action in the fitted state as described later, the tip of the other contact fittings 3. Rotation according to the rotation of the section 2 is allowed.

As shown in FIGS. 2 and 3, the carrier part 2 is formed without breaking off the contact fitting 3 for pressing the electric wire.
With the contact fitting 3 in the contact storage section
14 and the remaining contact fittings 3 attached to the carrier part 2 are put into the empty space 411. At this time,
The carrier portion 2 is held and fitted. that way,
There is no need to touch the contact fitting 3, and no dirt or the like adheres to the contact portion 3 a of the contact fitting 3. Also,
Since the carrier 2 is provided, it is easier to handle than the state of the single contact fitting 3, and the speed of the operation of pressing the electric wire against the contact fitting can be increased.

As shown in FIG. 5, the electric wire 5 is inserted between the contact fitting 3 fitted into the contact storage portion 14 and the press-contact punch 15.
Insert If a stopper 414 for stopping the fitting of the contact fitting 3 is provided in the contact storage portion 14, the fitting quantity of the contact fitting 3 can be made constant by fitting the contact fitting 3 until it comes into contact with the stopper 414. Therefore, it is preferable. If a stopper 415 for stopping the insertion of the distal end of the electric wire 5 is provided above the contact storage portion 14, the electric wire 5 can be stopped.
It is preferable to insert the wire 5 until the wire 5 comes into contact with the wire, because the amount of insertion of the wire 5 can be made constant. By using the two stoppers 414 and 415, the electric wire 5 can be pressed at a predetermined position of the contact fitting 3. Next, as shown in FIG. 4, the lever 12 is closed, the press-contact punch 15 is advanced to the contact storage portion 14, and the electric wire 5 is pressed against the contact fitting 3. As a result, the end of the press contact 3b of the contact fitting 3 bites into the coating 5a of the electric wire 5, comes into contact with the inner core wire 5b, and is electrically connected.
With the contact fitting 3 inserted into the contact storage part 14, the carrier part 2 is reciprocated in the directions of arrows A and B. At this time, the contact fittings 3 fitted into the contact storage portions 14 are cut off at the roots on the carrier part 2 side by this holding action, but the remaining contact fittings 3 are empty.
Because of the presence of 411, the movements of their tips are not regulated and move in the directions of arrows A and B together with the carrier part 2 and are not broken off.

As described above, the contact fittings 3
If the contact fitting 3 is cut off from the carrier part 2 in a state where the contact fitting 3 is fitted, the deformation of the contact fitting 3 is reduced. In this case, if the fold is performed while being pressed by the press-contact punch 15, the holding action becomes more reliable, the fold operation is stabilized, and the deformation can be further reduced.

As shown in FIG. 6, the contact fitting 3 having completed the pressure contact with the electric wire 5 is extracted from the contact storage section 14 and fitted into the contact storage section 14 with the next contact fitting 3 attached to the carrier section 2. Similarly, the electric wire 5 is pressed and cut off from the carrier portion 2. Thereafter, the above operation is repeated to press the electric wires to the desired number of contact fittings. The contact fitting 3 to which the electric wire 5 is pressed is 1
After the full pressure contact or after the entire pressure contact, as shown in FIG. 7, the connector 6 is inserted and fixed in the housing 7.
This fixing is performed by engaging the engagement projection 3c of the contact fitting 3 with the engagement hole 7b of the housing 7.

In this embodiment, a projection 412 used to release the fixing between the contact fitting 3 and the housing 7 of the connector 6 is provided on the inner surface of the distal end of the main body 41. In this embodiment, a groove 413 and an index 416 are provided adjacent to the protrusion 412. The groove 413 is for inserting and guiding the direction-aligning projection 7a of the connector 6 formed on the side surface of the housing 7 of the connector 6 while sliding. This makes it easy to align the projection 412 with the locking hole 7b. When removing the contact metal fitting on the side where the alignment projection is not provided, the groove 413 cannot be used directly, but can be used as a guide. Insert the projection 412 into the locking hole 7b,
Is pressed against the main body 41 of the tool. Then the projection 412
Presses and deflects the engagement protrusion 3c to release the engagement with the locking hole 7b. When the electric wire 5 is pulled in the direction of the arrow in FIG. 7 while maintaining this state, the contact fitting 3 can be pulled out of the housing 7.

In FIG. 2 and FIG. 8, reference numeral 417 denotes a hole in the meat of the main body.

Note that the wire pressure welding method according to the first invention and the wire pressure welding tool according to the second invention are not limited to the above embodiments. For example, in the wire pressure welding tool according to the second invention, the cavity does not need to be formed as a recess in which a part of the side wall of the main body is cut out. Alternatively, a dent formed by cutting the side wall of the main body to the end, that is, a dent formed by lowering the contact housing portion of the main body from the portion next to the contact housing portion to the tip thereof, may be used. Further, it is needless to say that the wire pressure welding tool according to the second invention can also be used to press the contact fitting broken off from the carrier portion to the wire.

〔The invention's effect〕

The wire pressure welding method according to the first invention, as described above,
By handling the carrier with the contact fitting attached to the carrier, the contact fitting is fitted into the contact storage portion of the electric wire pressure welding tool, and the contact fitting is folded off from the carrier using the holding action in the fitted state. . For this reason, according to this method, the deformation of the contact fitting is small, and a finger or the like does not touch the contact portion of the contact fitting, so that the contact reliability of the contact fitting is not impaired. Further, since the carrier portion is handled, the handling speed can be increased as compared with the case where the contact fitting is handled alone.

The wire pressure welding tool according to the second invention is, as described above,
A portion of the main body beside the contact storage portion receives a tip of another contact fitting when the earliest contact fitting of the contact fitting group is fitted into the contact storage portion, and A space is provided that allows the tip of another contact fitting to rotate when the contact fitting is folded off from the carrier portion by using the holding action in the fitted state. For this reason, if this tool is used, the wire pressure welding method according to the first invention can be performed, and the deformation of the contact fittings is small,
Work can be performed without touching the contact portion of the contact fitting with a finger or the like.

[Brief description of the drawings]

FIG. 1 (a) is a side view of one embodiment of the wire pressure welding tool according to the second invention, FIG. 1 (b) is a rear view thereof, FIG. 2 is a perspective view thereof, and FIG. 3 is a contact fitting. FIG. 4 is a perspective view of a part showing a state where the electric wire is pressed with the carrier, FIG. 4 is a perspective view of a part showing a state where the electric wire is pressed, FIG. 5 is a cross-sectional view of a part showing a state where the electric wire is about to be pressed, FIG. 6 is a perspective view of the electric wire pressed against the contact fitting, FIG. 7 is a cross-sectional view showing a state where the electric wire is attached to the connector, and FIG.
The figure is a perspective view showing one conventional example. 2 Carrier part 3 Contact fitting 4 Wire press tool 5 Wire 12 Lever 14 Contact storage part 15 Pressing punch 41 Main body 411 Empty space

Claims (2)

(57) [Claims] 1. An electric wire press-connecting device, wherein a press-contacting punch is protruded into and retracted from a contact storage portion by lever operation, and an electric wire is pressed against a contact fitting fitted into the contact storage portion by the press-contact punch. In the method, of a plurality of contact fittings spaced from each other and connected at one end to one carrier part, the earliest contact fitting is fitted into the contact storage part of the wire pressure welding tool, and the other contact fittings are connected. A step of accommodating in a space arranged adjacent to the contact housing section and arranging a carrier section in a side space of the contact housing section and the space; Press-contacting the wire with a press-contacting punch; While the, moving the other contact metal and the carrier portion, wire pressing method comprising a step of break off the contact metal fitting the electric wire is pressed from the carrier unit. 2. A contact housing portion is provided in a main body, and a press-contact punch is protruded and retracted by operating a lever in the contact housing portion. An electric wire pressure welding tool adapted to be in pressure contact with a carrier, wherein, of a plurality of contact fittings arranged at intervals and connected to one carrier, the earliest contact fitting is the other contact fitting and carrier. A contact storage portion that is fitted separately from the portion, and a contact storage portion that is disposed in a portion beside the contact storage portion, and when the foremost contact metal fitting is fitted into the contact storage portion, another contact metal fitting of the contact metal fitting group is provided. With the earliest contact fittings fitted and held in the contact storage portion, the key Wire pressing tool and a cavity which allows the rotation of the other metal contact with the rear portion.