Work holders – With fluid means – Cylinder-piston means directly moves jaw
Patent
1998-03-10
1999-11-16
Watson, Robert C.
Work holders
With fluid means
Cylinder-piston means directly moves jaw
269 45, 269 43, B23Q 308
Patent
active
059842881
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention pertains to a device for clamping components with a bracket, a support that can be fastened to an upper abutment of the bracket for the components, and a pneumatic tensioner, which is held at the abutment of the bracket and actuates a pressure piece that can be tensioned against the components located on the support. The components are in particular metal plates within a motor vehicle assembly line.
BACKGROUND OF THE INVENTION
Such devices are used especially in the manufacture of bodies in the automobile industry to automatically clamp metal plates to be welded to one another. A plurality of such devices are arranged within an assembly line. Each of these devices must be designed according to the necessary spatial arrangement of the metal plates to be clamped. This is expensive.
SUMMARY AND OBJECTS OF THE INVENTION
The primary object of the present invention is therefore to improve a device of the class described in the introduction such that the bracket can be manufactured from a few components according to various spatial arrangements of the clamping site between the support and the pressure piece.
This object is accomplished by the bracket having a clamping frame on the foot side and a centering piece for a prop that can be fastened thereto and by the abutment being provided on the underside with a centering for the prop that can be fastened thereto. The bracket of the device is manufactured according to the present invention from a plurality of prefabricated components. The components may be arranged and aligned in relation to one another such that the clamping site between the support and the pressure piece assumes the actually necessary position. In particular, the prop may be manufactured from a semifinished material, which is cut to the needed length. All this leads to a substantial simplification of the manufacture and to a reduction of the costs associated with it.
The clamping frame should preferably have a vertical junction surface for the centering piece. The centering piece for the prop can thus be fastened to this vertical junction surface in different angular positions, so that the prop can be aligned, if needed, not only vertically, but also at an angle to the vertical.
In combination with this or independently from this, the clamping frame may also have a junction surface sloping against the vertical for the centering piece, so that there is an additional degree of freedom for the arrangement of the centering piece.
For embodiments in which the alignment of the prop remains unchanged, the clamping frame and the centering piece may also have a one-piece design.
In a preferred embodiment of the present invention, the prop is a pipe, especially precision steel pipe. To center this pipe, the centering piece and the abutment should have centering surfaces, which extend in parallel to the longitudinal axis of the prop or the pipe.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which preferred embodiments of the invention are illustrated.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1 is a schematic side view of a device for clamping components;
FIG. 2 is a perspective view of the object according to FIG. 1;
FIG. 3 is a schematic side view of another embodiment of the object according to FIG. 1; and
FIG. 4 is a perspective view of the object according to FIG. 3.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The device shown in the drawing is used to clamp metal plates within a motor vehicle assembly line. In its basic design, it comprises a bracket 1, which can be fastened to a foundation, not shown, and carries on the top side an abutment 2, on which a support 3 for the components 4 to be clamped is fastened. A pneumatic tensioner 5,
REFERENCES:
patent: 688230 (1901-12-01), Isgrig et al.
patent: 2497943 (1950-02-01), Ingwer
patent: 4214739 (1980-07-01), Dailey
patent: 5280892 (1994-01-01), Smith
Thyssen Industrie AG
Watson Robert C.
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