Wire inserter tool

Details Wire inserter tool Wire inserter tool

1994-10-26

1996-10-08

Vo, Peter

Metal working

Means to assemble or disassemble

Means to assemble electrical device

29750, 295663, B23P 1900, H01R 4300

Patent

active

055618987

DESCRIPTION:

BRIEF SUMMARY
This invention relates to a tool for inserting wires into an insulation displacement connector having a plurality of insulation displacement contacts, the tool comprising an inserter blade for forcing wires between tines of the contacts, and a locating device to position the tool relative to the connector for insertion of wires. Such a tool is conventionally referred to as a punch-down tool.
Insulation displacement connectors are widely used, particularly in the telecommunications field, and require the wires to be pushed into a fork-shaped metal terminal so that as the wire is forced into the slot of the terminal, the sides of the fork displace the insulation round the wire and contact is made with the terminal. The wire is thus gripped tightly.
To ensure that a proper connection is made, a special tool is used to force the wire into the slot of the terminal. This punch-down tool guides the wire into the slot of the terminal and controls the depth to which it is forced so that the wire is retained correctly and not pushed so deeply as to sever the wire.
Two types of insulation displacement connector are generally used in the United Kingdom, one being made to the AT&T Inc. standard and the other being made to the specification used in the United Kingdom by British Telecom Plc, and produced originally by Krone GmbH. Separate insertion tools are required for use with these two types of connector. Although the function of the tools is similar, they differ in their locator sections due to differences in connector design. Thus, use of the incorrect tool may damage the connector. As well as risking damage by use of the incorrect tool, it is inconvenient for an engineer to have to carry different types of tool.
The present invention aims to overcome the disadvantages mentioned above.
Accordingly, the invention is characterised in that the locating device has a first portion for locating the tool on a first connector type for insertion of wires therein, and a second portion for locating the tool on a second connector type for insertion of wires therein. This arrangement has the advantage of providing a universal tool which may be used with more than one type of insulation displacement connector.
In a preferred embodiment of the invention there is provided a tool wherein the first portion of the locating device is narrower than the second portion and is arranged between the inserter blade and the second portion. This embodiment relies on the appreciation that the difference between the two types of connector lies in the fact that the inserter tool can be located on the AT&T type of connector with a locator device which is too thin to permit location on the Krone type.
An embodiment of the invention will now be described, by way of example, and with reference to the accompanying drawings in which:
FIG. 1 is a plan of a conventional first connector type;
FIG. 2 is a plan of a conventional second connector type;
FIG. 3 is an end view of a prior art inserter head for use with the connector of FIG. 2;
FIG. 4 is an enlarged side view of the head of FIG. 3;
FIG. 5a is a schematic end view of an inserter head embodying the invention;
FIG. 5b is an end view of a production embodiment of an inserter head embodying the invention;
FIG. 6a is a schematic enlarged side view of the head of FIG. 5a;
FIG. 6b is an enlarged side view of a production embodiment of the head of FIG. 6a;
FIG. 6c is a perspective side view of a production embodiment of the head of FIG. 5b;
FIG. 7 is a cross-section along the line X--X' of FIGS. 6a and 6b showing the inserter head in position in a first connector type; and
FIG. 8 is a cross-section along the line X--X' of FIGS. 6a and 6b showing the inserter head in position in a second connector type.
Conventional connectors shown in FIGS. 1 and 2, comprise a plastic moulding or housing (2,20), a channel (6,60) within the plastic moulding, in which the wire to be inserted will lie, and an insulation displacement contact IDC (4,40) positioned in the plastic moulding. The contact (4,40) is housed in the pl

REFERENCES:
patent: 3611264 (1971-10-01), Ellis
patent: 4048710 (1977-09-01), Nijman
patent: 4306349 (1981-12-01), Knickerbocker
patent: 4784669 (1988-11-01), Maack
patent: 5099570 (1992-03-01), Gerhard, Jr.
patent: 5195230 (1993-03-01), Krietzman

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