Gear cutting – milling – or planing – Milling – With means to protect operative or machine
Patent
1997-08-29
1999-01-26
Briggs, William R.
Gear cutting, milling, or planing
Milling
With means to protect operative or machine
160202, 451454, B32Q 1108, B23C 900, E05D 1506
Patent
active
058631631
DESCRIPTION:
BRIEF SUMMARY
CONTINUATION STATEMENT
This application is a 371 of Application PCT/EP96/00779, filed on 26 Feb. 1996, which in turn claims foreign priority to German Application 195 08 266.4 filed 8 Mar. 1995.
BACKGROUND OF THE INVENTION
The invention relates to a cover for a machine bed of a machine tool with covering boxes which can be pushed telescopically one inside another.
A covering box for covers which can be telescopically lengthened and shortened for slideways on machine tools is known from DE 40 26 609 C1. The covering box has a top wall and two side walls arranged at right-angles to the top wall, which are directly or indirectly connected to an end wall of the box. The covering box further has catches arranged on the end wall, above the side walls, projecting outwards, for the next largest covering box which has a corresponding counter catch. Each side wall has a longitudinal notch or a longitudinal slit on its edge adjacent the end wall, through which the front end of the catch, which is connected in a removable manner to the end wall in the form of a bar, protrudes. The covering box is made from a one-piece sheet metal blank. The longitudinal notches or longitudinal slits are necessary for attaching the catch, in the form of a bar, to the box.
The manufacturing cost for a covering box of this type with a bar is relatively high. In order to ensure that the end wall of the box, on which the catch is fixed, is not bent by the forces occurring when the boxes are displaced, it is known from DE 40 26 609 to weld the end wall to the side walls. The welding procedure must be carried out very carefully as distortion of the covering box can result due to the heat created during welding. Such distortion of the covering box cannot be completely ruled out, so subsequent straightening of the covering box is necessary.
SUMMARY OF THE INVENTION
Proceeding from this state of the art, the object of the invention is to simplify the manufacturing of a covering box. This object is solved according to the invention by a covering box for a machine bed of a machine tool with covering boxes which can be pushed one inside another, wherein each covering box comprises a first side wall and a second side wall and a top wall connected to the side walls, and projecting outwards from a side wall at least one catch for the next largest covering box provided with a corresponding counter catch, wherein the catch is configured on a profiled catch section arranged on a side wall wherein the corresponding counter catch is arranged on a side wall of the next largest covering box.
The cover according to the invention for a machine bed of a machine tool with covering boxes which can be pushed telescopically one inside another is distinguished in that the catch is configured on a profiled catch section arranged on one side wall of the covering box. The manufacturing of a covering box, and thereby the cover, is simplified by this configuration of the covering box. The profiled catch section is preferably joined to a side wall of the covering box. The joining of the catch profile to the side wall can be done by screwing. Bores are configured in the side wall for this purpose, through which a screw can extend. According to an advantageous further development, it is proposed to provide the profiled catch section of the surface adjacent to the side wall with a T-shaped groove extending in the longitudinal direction of the profiled catch section, open on at least one end face. In the T-shaped groove, the head and the neck of a screw can be accommodated. When the profile section is mounted, the head lies on the covering box on the shoulders of the T-shaped groove. It is also possible to fit a nut into the T-shaped groove instead of the head. The advantage of the T-shaped groove can be seen in that regardless of the position of the bores in the side wall, a connection can be established with the profiled catch section. The forces affecting the catch during displacement of the covering boxes are transferred to the side wall by the screwing of the pro
REFERENCES:
patent: 4522246 (1985-06-01), Bierbrauer et al.
patent: 4860917 (1989-08-01), Stohr
patent: 5119869 (1992-06-01), Henning
patent: 5156195 (1992-10-01), Wehler et al.
patent: 5570979 (1996-11-01), Okamoto et al.
Muller Roland
Wehler Herbert
Briggs William R.
Kabelschlepp GmbH
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