Wire curvature correcting device in pressure connection of wire

Details Wire curvature correcting device in pressure connection of wire Wire curvature correcting device in pressure connection of wire

1999-09-07

2001-05-08

Larson, Lowell A. (Department: 3725)

Wireworking

Wire straightening

C029S748000

Reexamination Certificate

active

06227260

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a wire curvature correcting device for correcting curvature of wires which are pressure-connected to a connector at the time of manufacturing a wire harness.
As an example of a wire harness for an automobile in which connectors are attached to both ends of wires arranged in parallel, one shown in
FIG. 7
is known. In this wire harness, eight wires “a” are connected to one connector C at one end thereof (hereafter referred to as the “A” end), and four wires “a” are connected to two connectors C, respectively, at the other end thereof (hereafter referred to as the “B” end).
Pressure connection (insulation displacement connection) such as the one shown in
FIG. 8
is adopted as the means of connecting the wires “a” to the connector C by taking into account operational features and the like. In this pressure connection, the wires “a” are pressed into grooves
60
in pressure connection terminals T, which are provided in each connector C, by being depressed by a press-in blade S. In conjunction with the pressing in, a sheathing
62
surrounding a bundle of conductors
61
of each wire “a” is cut off at side edges of the groove
60
, and the bared bundle of conductors
61
is brought into contact with the pressure connection terminal T, and each wire “a” is held in the groove
60
by the springing back of the pressure connection terminal T. Then, after the pressing in of the wires “a” into the pressure connection terminal T, the connector C is covered with a terminal cover L so as to prevent the wires “a” from coming off, as shown in FIG.
9
.
As the apparatus for manufacturing a wire harness for effecting such pressure connection, an apparatus is conceivable which grips the end portion of the wire “a” by means of a chuck so as to convey the end portion of the wire “a” to the wire pressure-connection section having the press-in blade S.
In the above-described pressure connection, there are cases where if there is a curvature in the end portion of the wire “a”, the wire “a” escapes from below the press-in blade S at the time of pressing the wire “a” into the terminal T, thus making it impossible to depress the wire “a” by means of the press-in blade S.
In addition, there are cases where if a projecting allowance of the wire “a” from the chuck gripping the wire “a” is insufficient, the wire “a” cannot reach the groove
60
in the terminal T.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to correct curvature in wires which are pressure-connected to the terminals of the connectors and to confirm the projecting allowance of each wire, so as to render the pressure connection reliable.
To attain the above-described object, in accordance with the present invention there is provided a wire curvature correcting device wherein, when a wire is pressed into a pressure connection terminal of a connector, and a wire curvature correcting chuck which has clamped an end portion of the wire is slid in a pulling direction along a surface of a sheathing of the wire, thereby making it possible to allow a press-in blade to reliably grip the wire and depress the same.
In addition, an arrangement is provided such that, in conjunction with the retraction of the wire curvature correcting chuck, its open/closed state is monitored by an opening/closing sensor to detect the amount of the projecting allowance of the wire with respect to pressure connection, and a required measure can be adopted if the projecting allowance is insufficient.


REFERENCES:
patent: 3029494 (1962-04-01), Andren
patent: 3948298 (1976-04-01), Braden
patent: 4367584 (1983-01-01), Janisiewicz et al.
patent: 4653159 (1987-03-01), Henderson et al.
patent: 5791037 (1998-08-01), Takada et al.
patent: 0 844 703 A1 (1998-05-01), None

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