Metal working – Means to assemble or disassemble – Means to assemble electrical device
Patent
1990-09-10
1991-10-08
Echols, P. W.
Metal working
Means to assemble or disassemble
Means to assemble electrical device
29863, 36179, B23P 1900
Patent
active
050541919
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a device for producing electrically conductive connections between one or a plurality of conductive members with direct contact by pressing or crimping, having a tool head driven, for example, electrically or pneumatically, in particular a crimping head with two jaws supported on a carrier or positioned in a housing, a switching or control device, as well as a switch which is actuated by a member which can be inserted into the tool head.
2. Description of Prior Art
Devices of the type mentioned above, which are also called electrical or pneumatic clamping devices, are typically used for a non-soldered connection of pinch connectors with and without insulation, as well as of crimp connectors. The devices may also be in the form of pneumatic crimping device with crimping heads which can be easily handled by the user. The working cylinder can be integrated into the handle of the crimping device. It then is possible, for example, to insert into the crimping head of such devices a wire end sleeve with a plastic collar, and the desired connection is made after the device has been switched on. Since the depth of the crimping head and the length of the wire end sleeve may be different, it is not always assured in known devices described, for example in U.S. Pat. No. 3,492,846, that the wire end sleeves are pinched or crimped at the desired spots.
SUMMARY OF THE INVENTION
Based on the above state of the art, it is an object of this invention to improve the known device without any undue structural expense in such a way that the crimping operation is started only after the wire end sleeve is in the desired position with respect to the crimping head.
This object is achieved in accordance with this invention with a switch supported by the carrier or the housing positioned in front of the tool head with respect to the direction of movement of the member and in that the member which can be inserted into the tool head has a bulge or enlargement which can operate the switch.
It is apparent that the object of this invention has been accomplished if the switch is disposed in such a way that on the one hand, positioning of the wire end sleeve within the crimping head can be optimized and, on the other, the actual operation of pinching or crimping is only started after such position has been actually attained.
Further practical and advantageous embodiments of this invention are apparent from the following description.
In a device positioned in a housing, a particularly advantageous embodiment of this invention provides for forming an opening in the housing which is aligned with the seat determined by the effective positon of the jaws. In a device intended for wire end sleeves with plastic collars it is practical if the switch is in the form of a flexible and plate-shaped body with a slit, where the width of the slit corresponds to the maximum width of the metal sleeve, and if the switch is actuated by pressure from the sleeve insulation.
In a further particularly practical embodiment, the crimping head, which is releasably connected with the housing, has a working cylinder integrated in it, which can be charged with compressed air.
In a further useful embodiment of this invention, the crimping head is a part of a crimping pliers, the movable jaw of which cooperates with a striker bolt. In this embodiment it is expedient if the striker bolt is coaxially positioned in a magnetic coil and can be operated by the magnetic field.
Within the scope of this invention it is useful if one end of the striker bolt facing the jaw has an impact head, while the other end cooperates with a restoring spring.
If the output of the striker bolt is to be adjustable, it is preferred that the striker bolt be seated inside of a plurality of magnets which are positioned coaxially to each other, each one of which can be individually excited.
BRIEF DESCRIPTION OF DRAWINGS
Two illustrative embodiments of the invention are schematically shown in the drawings wherein.
FI
REFERENCES:
patent: 3492541 (1970-01-01), Grebe et al.
patent: 3492846 (1970-02-01), Jones
patent: 3710483 (1973-01-01), Morgan et al.
patent: 4031613 (1977-06-01), Brown et al.
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