JPH04359873A - Pressure welding connector and its inspection device - Google Patents

Abstract

PURPOSE:To provide a pressure-welding connector whereby a worker can judge without difficulty whether or not the terminal portion of an electric wire is already inserted surely into each of the terminal-locking portions. CONSTITUTION:An electric wire 11 is inserted at its terminal portion 11 into each of terminal-locking portions 13 each formed along the sidewall 5 of a pressure-welding connector. A pusher jig 23 is inserted into each of specified terminal-locking portions 13 through an opening 20 from a through hole 21a in a guide portion 21. When the terminal portion 11' of the wire is at a specified position then the pusher jig 23 is abutted upon the wire to light a lamp 24a for confirming the presence of the wire. When the wire on the other hand is not at the specified position, the pusher jig 23 is abutted upon a wall 12a to light a lamp 24b for indicating the absence of the wire. As a result of the above- mentioned process, a worker can simply acknowledge whether or not the wire is already reached to the specified position of a specified terminal-retaining portion.

Description

[Detailed description of the invention]

0001

TECHNICAL FIELD The present invention relates to a technology for connecting electric wires to insulation displacement connectors, and in particular, a method for easily and reliably connecting the terminal end of an electric wire to an insulation displacement connector. and devices.

0002

[Prior Art] Wire harnesses used for in-vehicle wiring in automobiles, etc., are easy to connect.
Pressure-welding connectors are often used at the connection portions of each wire harness. Various types of insulation displacement terminals are known for use in such insulation displacement connectors, such as the one described in Japanese Patent Application Laid-Open No. 60-140682. , and there was no pressure welding connector with reliable connection. Therefore, in a previous application (Utility Application No. 2-079130), the present applicant proposed a press-contact connector as described below.

As shown in FIGS. 5, 6, and 7, the press-contact connector 1 is comprised of a press-contact terminal 2, a housing 3 in which the press-contact terminal 2 is fitted, and a housing cover 4. The pressure contact terminal 2 has a plurality of slots 2a arranged in parallel on the top of a conductive plate bent into an inverted U shape, and is attached to both side walls 5 of the housing 3.
, 5 is embedded and fixed approximately in the center between them. Further, standing walls 6, 6 are arranged symmetrically on both sides of the pressure contact terminal 2, and the standing walls 6 have a wire guide groove 6a having a protrusion at the tip to prevent lifting, and a wire guide groove 6a is formed between each of the slots 2a and the shaft. It is formed to match.

Wire holding grooves 5a corresponding to the respective slots 2a are bored in the outer side walls 5, 5 of the standing wall 6, and further,
A protrusion 5b serving as an auxiliary lock with the housing cover 4 is provided on the inner upper part of the side walls 5, 5, and an arm 7 for main locking is provided on the side surface of the housing 3 perpendicular to the side walls 5, 5.
are formed respectively. On the other hand, housing cover 4
has protrusions 8a and 8b protruding from its inner surface for pushing the electric wire, lock claws 9 that engage with the arm 7 of the main lock on both ends, and a plurality of lock claws on both sides that engage with the protrusions 5b. It has a locking part 10.

FIG. 6 shows a state in which the housing cover 4 has started to be locked to the housing 3, and FIG. 7 shows a state in which the locking has been completed, respectively, taken along the line A--A in FIG. As shown in the figure, a thick wall portion 5c is formed at the lower inner side of one side wall 5 of the housing 3 via a guide slope, and a projection 5d is formed at the lower end.
is formed. In addition, an inner wall 12 is provided inside the side wall 5.
is erected, and there is a hook-shaped bent part 12a at the top.
The bent space between the side wall 5 and the inner wall 12 becomes an end locking portion 13, and this end locking portion 13 penetrates the bottom of the housing 3. And the entrance dimension d of the terminal locking part 13
is thicker than the diameter of the wire, but the distance e from the tip surface of the thick wall portion 5a to the tip surface of the hook-shaped bent portion 12a is made smaller than the diameter of the wire so that the wire is difficult to come off from the terminal locking portion 13. I have to.

[0006] The terminal portion 11' of the electric wire 11 is connected to the pressure welding connector 1.
When connecting the electric wire 11 to the terminal locking part 1, first
When the tip of the electric wire 11 comes into contact with the protrusion 5d, the advance is stopped. From this state, the electric wire 11 is bent at a substantially right angle and placed on the slot 2a. At this time, the terminal part 11' of the electric wire 11 is locked by the terminal locking part 13, and the other side is fitted and locked in the wire guide groove 6a and the wire holding groove 5a, and the electric wire is held in the longitudinal direction. , held in an almost immobile state. In this state, as shown in FIG. 6, the housing cover 4 is placed and pressed from above. The protrusions 8a and 8b of the housing cover 4 push the electric wire 11 into the slot 2a, the insulation coating of the electric wire 11 is stripped off, and the conductor of the electric wire and the pressure contact terminal 2 are electrically connected. Housing cover 4
When the fitting is completed, the electric wire 11 is bent and firmly connected to the pressure contact terminal 2, as shown in FIG.

The above is a case where the terminal portion 11' of the electric wire 11 and the insulation displacement connector 1 are in pressure contact. However, when connecting with the intermediate portion of the electric wire 11, the electric wires on both sides of the slot 2a are connected to both sides of the insulation displacement connector 1. The electric wires 11 are held symmetrically by the electric wire guide grooves 6a, 6a and the electric wire clamping grooves 5a, 5a, and the electric wires 11 are in a state of protruding on both sides of the pressure contact connector 1.

By the way, in the above technique, when the wires are pressure-welded in the middle, the wires protrude from both the left and right sides of the pressure-welding connector as described above, so it is easy to check from the outside, but the wires are easily checked from the outside. In the case of press-contacting the end portion 11', in order to ensure the press-contact, it is necessary to accommodate the end portion 11' in a predetermined position within the end locking portion 13, which is difficult to confirm. Therefore, in the above-mentioned prior application, the terminal locking part 13 is penetrated at the bottom so that the terminal part 11' of the electric wire 11 can be visually confirmed from below the housing. Also,
In the same prior application, as another embodiment, an opening communicating with each terminal locking part 13 is formed below the side wall 5 of the housing,
A device has also been proposed in which this opening is opened and closed with a cover, and the terminal locking portion can be checked by opening the cover.

[0009]

[Problem to be Solved by the Invention] However, it is very time-consuming and labor-intensive to visually check the presence or absence of a wire end in all of the terminal locking parts of a large number of pressure welding connectors one by one. It's inefficient. Further, depending on the pressure welding connector, a variety of connection methods can be used, such as connecting some electric wires at the middle and connecting the remaining wires at the terminal portions. It is extremely difficult to confirm them without any mistakes. The present invention has been made in view of the above-mentioned facts, and provides a pressure welding connector that makes it easy to determine whether or not the end portion of an electric wire is securely inserted into a predetermined end locking portion, and such a pressure welding connector. The purpose of this invention is to provide a device for pressure-welding electric wires to connectors.

0010

[Means for Solving the Problems] In order to achieve the above object, the insulation displacement connector of the present invention has one or more insulation displacement terminals fitted in a housing, and a pressure welding terminal formed in the housing corresponding to each insulation displacement terminal. A configuration is adopted in which a terminal locking portion of the electric wire and an opening for confirming the terminal portion communicating with each terminal locking portion are provided. Further, the device for pressure-welding the electric wire to the pressure-welding connector includes a guide portion for positioning the pressure-welding connector, a holding jig that advances and retreats from the outside of the guide portion through the opening into the terminal locking portion, and the holding jig. A configuration consisting of two types of display means that alternatively indicate that the electric wire has reached either the position where it contacts the terminal end of the wire within the terminal locking part, or the position where it has passed through the corresponding contact position when there is no terminal end. is adopted.

[0011]

[Operation] After positioning the pressure welding connector by abutting it against the guide portion, the end portion of the electric wire is inserted into the end locking portion formed on the pressure welding connector. The holding jig is inserted from the outside of the guide part through the opening of the housing and into each end locking part. When the terminal end of the electric wire is at a predetermined position, the holding jig contacts the electric wire there, and the display means indicates that the terminal end of the electric wire has been detected. If the wire is not in the predetermined position, the holding jig passes through the position where the wire should be, and the display means indicates that the wire is not present. With the above, it is possible to easily inspect whether the electric wire is at the predetermined position of the predetermined terminal holding portion.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the configuration of the present invention, and the pressure welding connector 1 is similar to that described in the conventional example, but has a plurality of openings 20 formed in the side wall 5 that communicate with each terminal holding part 13. . In addition, in this embodiment, the opening 20 is formed for each terminal holding part 13, but each opening 20 is connected,
It is also possible to provide a configuration in which only one elongated opening is formed.

Reference numeral 21 designates a guide portion. This guide portion 21 surrounds and positions the press-connecting connector 1 within a frame without wobbling, and has a through hole 21a corresponding to the terminal holding portion 13. This through hole 21a may also be formed by connecting each hole into one. Reference numeral 23 indicates a holding jig, which is provided so as to be able to move forward and backward in the longitudinal direction, and which is inserted into the through hole 21a.
and penetrates the opening 20 to reach the inside of the terminal holding part 13,
At the same time as detecting the terminal end 11' of the electric wire at a predetermined position within the terminal holding section, the terminal section 11' is held between the wall 12a of the terminal holding section 13.

A lamp 24 as a display means is provided close to the holding jig 23. The lamp 24 includes a lamp 24a that lights up when it detects that the end portion 11' of the wire is at a predetermined position within the terminal holding portion, and a lamp 24a that lights up when it detects that the end portion 11' of the wire is not at a predetermined position. and a lamp 24b that lights up. In the figure, one set of lamps 24a, 2
4b is shown, but in this case, the lamp 24a lights up only when all the holding jigs detect the terminal part 11' in the predetermined terminal locking part 13, and even if any one of the terminals is locked, the lamp 24a is turned on. When there is no wire end portion 11' in the portion 13, the lamp 24b is turned on.

Furthermore, if two types of lamps 24a and 24b are provided for each holding jig 23, it is possible to quickly and easily determine which terminal holder has a wire and which terminal holder does not have a wire. can judge. At this time, it is desirable to change the display method of the display means, for example by making the lamp 24a for detecting the terminal part 11' blue and the lamp 24b for detecting the absence of the terminal part 11' red. Furthermore, it goes without saying that the holding jig 23 is not necessary for the terminal locking portion of the press-contact terminal that comes into press-contact with the middle of the electric wire.

Next, the display by the display means, that is, the lighting of the lamp 24 in this embodiment will be explained. Figure 2
As shown in FIG. 4, two protrusions 23a and 23b are provided on the lower surface of the holding jig 23, and switches 25a and 25b are provided below the holding jig 23. The holding jig 23 can move forward and backward in the left and right directions in the figure.
It is normally biased to the left in the figure by spring means 26.

The side wall 5 forming the terminal holding part 13 does not have the thick part 5c or the protrusion 5d shown in the conventional example, and the terminal holding part 13 has a simple structure with few bent parts. This is because the terminal part 11' of the electric wire is held between the tip of the holding jig 23 and the inner wall 12a at the back of the terminal holding part 13. Therefore, there is no problem in adopting the same configuration as the conventional one.

[0018] The terminal portion 11' of the electric wire 11 is held at the terminal holding portion 13.
As shown in FIG. 2, the tip is brought into contact with the support surface of the housing or the bottom of the terminal holder 13, if it has a bottom. Since the guide frame 21 is usually placed on the workbench, the wire can be stopped on the support surface of the workbench, and the terminal holding part 1
Even if the lower part of housing 3 penetrates to the outside,
The electric wires do not protrude from the lower surface of the housing, and unnecessary work, such as cutting the electric wires protruding below the housing with scissors or the like, which was conventionally done, becomes unnecessary.

Next, the holding jig 23 is moved to the right in the figure against the biasing force of the spring means 26 by an appropriate means, so that the tip of the holding jig 23 and the back side of the terminal holding part 13 are moved. The electric wire 11 is held between the wall 12a and the wall 12a. The electric wire 11 is held in such a manner that it cannot be moved in its length direction. The protrusion 23a of the holding member 23 is connected to the switch 25a of the terminal portion 11'.
Press to turn on the lamp 24a that detects the presence of the terminal section 11'.

After the terminal parts 11' are clamped in each terminal holding part 13, each electric wire 11 is bent at a right angle and inserted into the slot 2a.
so that it stands on top of the After that, the cover 4 may be placed on and pushed in as in the case of the conventional example. FIG. 4 shows a case where the electric wire 11 is inserted incorrectly and the terminal portion 11' does not reach the predetermined position of the terminal holding portion 13. The tip of the holding jig 23 advances beyond the position where the end portion 11' should be, directly contacts the back wall 12a of the end holding portion 13, and presses the protrusion 23b.
turns on the switch 25b, and the lamp 24b indicating the absence of the electric wire lights up. This allows the operator to know that the wire is not in any of the terminal holding parts 13, and inspects and corrects it so that all holding jigs are securely attached to the wire terminal part 1.
1' is detected, each electric wire 11 is bent and placed on the slot 2a, the cover 4 is placed on the electric wire, and the electric wire is pushed into the slot 2a to establish electrical conduction between the conductor of the electric wire and the pressure contact terminal 2.

In the above embodiment, the holding jig 23 may be used only for checking the wire end portion 11'. That is, after connecting the terminal part 11' of the electric wire 11 and the pressure welding connector 1, it is inserted into the guide frame and pressed with the holding jig 23 to confirm the presence or absence of the terminal part 11' of the electric wire. can be used.

[0022]

[Effects of the Invention] As explained above, according to the present invention,
When connecting an end portion of an electric wire to a pressure contact connector having one or more pressure contact terminals, it is possible to easily determine whether the end portion of the wire is securely inserted into a predetermined terminal locking portion. Also,
If the terminal part of the electric wire is held by a holding jig, the pressure welding work will be easier to perform and work efficiency will be improved.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a schematic configuration of an apparatus of the present invention for pressure-welding an electric wire to a pressure-welding connector.

FIG. 2 is a cross-sectional view showing a state in which the pressure welding connector is accommodated within the guide frame.

[Fig. 3] A diagram similar to Fig. 2, showing a state in which the end of the wire is fitted into the predetermined position of the end locking part, the holding jig confirms the end of the wire, and the lamp is lit. FIG.

[Fig. 4] A diagram similar to Fig. 2, showing that the holding jig is in contact with the back wall without the end of the wire not reaching the predetermined position of the end locking part, and there is no end of the wire. FIG. 3 is a cross-sectional view showing a state in which a lamp displaying .

FIG. 5 is an exploded perspective view of the insulation displacement connector described in the earlier application of the present application.

6 is a sectional view taken along the line AA in FIG. 5, showing a state in which the end of the electric wire is locked in the end locking part of the insulation displacement connector in FIG. 5, bent, placed on the insulation displacement terminal, and covered with a cover; .

7 is a sectional view taken along the line AA in FIG. 5, showing a state in which the cover in FIG. 6 is pushed into a predetermined position and the connection between the electric wire and the pressure contact terminal is completed.

[Explanation of symbols]

1 Pressure connector 2 Pressure contact terminal 3 Housing 4 Housing cover 5 Side wall 11 Wire 12a Back wall 13 of end locking portion Terminal locking portion 20 Opening 21 Guide frame 21a Through hole 23 Holding jig 24 Display means 24a (Wire end (for detecting the presence of parts) Display means 2
4b Display means 25 (for detecting the absence of the terminal part of the electric wire)
switch

Claims (3)

[Claims] Claim 1: Fitting one or more pressure contact terminals into the housing, and confirming the terminal locking portion of the electric wire formed in the housing corresponding to each pressure contact terminal, and the terminal portion communicating with each terminal locking portion. A pressure welding connector characterized by having an opening for use. 2. One or more insulation displacement terminals, an electric wire end locking portion formed in the housing corresponding to each insulation displacement terminal,
A device for pressure-welding an electric wire to a pressure-welding connector having an opening for checking the terminal that communicates with each terminal locking portion, the device includes a guide portion for positioning the pressure-welding connector, and a terminal passing through the opening from the outside of the guide portion. The holding jig advances and retreats into the locking part, and the holding jig reaches either the position where it contacts the end of the wire within the terminal locking part, or the position where it passes through the corresponding contact position when there is no terminal part. 1. A device for pressure-welding an electric wire to a pressure-welding connector, comprising two types of display means that alternatively indicate the following. 3. A position passing through the abutting position is
3. The apparatus for press-welding an electric wire to a press-contact connector according to claim 2, wherein the terminal part of the electric wire is clamped between the holding jig and the wall of the terminal locking part.