US3345850A

US3345850A - Roll tables

Info

Publication number: US3345850A
Application number: US470715A
Authority: US
Inventors: Sack Ernst Theodor; Becker Ernst
Original assignee: Maschinenfabrik Sack GmbH
Current assignee: Maschinenfabrik Sack GmbH
Priority date: 1965-06-30
Filing date: 1965-07-09
Publication date: 1967-10-10
Anticipated expiration: 1984-10-10

Description

Oct. 10, 1967 United States Patent F 3,345,850 ROLL TABLES Ernst Theodor Sack, Hosel, and Ernst Becker, Dusseldorf- Rath, Germany, assignors to Maschinenfabrik Sack G.m.b.H., Dusseldorf-Rath, Germany Filed July 9, 1965, Ser. No. 470,715 3 Claims. (Cl. 72-251) In roll tables such as are used, for instance, on both sides of the roll stands of rolling mills, casings holding the bearings for the rolls of the roll table are mounted on a supporting frame, which extends along the length of the table. The casings are rigidly connected to the frame by at least four bolts per casing. In another known kind of roll table, the rolls, with the bearing casings mounted on the roll journals, are pushed into the frame as far as an abutment through lateral apertures in the form of round holes, in one side of the support frame, after which the bearing cases are screwed to the frame in the same way.

With this kind of connection between the bearing casings and the frame of a roll table, considerable labour and time is required to assemble the table and to replace unserviceable rolls; it is particularly difficult to replace the rolls of the roll tables of rolling mills in operation, since the mill must be stopped and time is lost in dismantling the old bearing casings and fitting the new ones.

It is an object of the invention to shorten the time necessary for removing and replacing the bearing casings of such roll tables and thus to enable rolls to be replaced more quickly and also to enable the table to be assembled more quickly initially.

To this end, according to this invention, in a roll table comprising a supporting frame and a number of casings holding hearings in which the rolls rotate, each bearing casing has a pair of parallel lugs which are perpendicular to the bearing axis and which straddle the top edge of a longitudinally extending wall forming part of the frame, the lugs having apertures which register with an aperture in the wall and the lugs being clamped tightly to the wall by wedges which are tightened against one another and extend through the apertures in the lugs and through the aperture in the wall. If the apertures in the lugs are slightly offset towards the bearing casings from the apertures in the wall, the Wedges which are clamped against one another force the bearing casing against the top edge of the wall to provide a connection which is strong and not readily movable in any direction.

A roll table constructed in accordance with the invention can have its bearing casings secured to the frame with little labour and it can be done very rapidly; to this end, the casings are placed from above with the lugs straddling the longitudinal walls of the frame and a pair of wedges are pushed through the registering apertures and are then jammed together.

An example of a roll table in accordance with the invention is illustrated diagrammatically in the accompanying drawings in which:

FIGURE 1 is a cross-section through the roll table, the bearing casings being sectioned axially and the supporting frame being sectioned transversely; and

Patented Oct. 10, 1967 ice FIGURE 2 is a side view of part of the roll table with some of the rolls removed.

Casings 3 holding roller bearings 2, 2' for journals 1a of rolls 1 each have two lugs 4 which are parallel with one another and perpendicular to the roll axis and are formed with apertures 4a, which are aligned with each other. The casings 3 are supported on sidewalls 5 of a supporting frame and the lugs 4 straddle the top edges of the side- Walls 5. At the place where each roll 1 is supported, the sidewalls 5 are formed with apertures 6 which are further away from the top edge of the sidewalls 5 than are apertures 4a in the lugs 4 but in other respects register with these apertures. Wedges 7 and 3 are pushed through the apertures 6 and 4a and are tightened against one another by means of a screwthreaded pin 9 fixed to each wedge 7. Each pin 9 extends through a bore in a stirrup-like extension 10* of the other wedge, and nuts 11 force the wedges 7 and -8 together to draw the bearing casing 3 tightly against the top edge of the wall 5. To facilitate fitting and reduce time lost by aligning the rolls to a desired spacing and by bringing the apertures in the lugs 4 into alignment with the apertures in the sidewalls 5, the sidewalls are formed with recesses 5a in their top edges.

These recesses locate the bearing casings 3.

The connection provided by longitudinally tightened wedges between the bearing casings and the frame is very reliable, but some other form of connection using eccentric pins which form rotating wedges and screwthreaded pins may be used instead.

We claim:

1. A roll table comprising a supporting frame and a number of casings holding bearings in which the rolls rotate, wherein each bearing casing has a pair of parallel lugs which are perpendicular to the bearing axis and which straddle the top edge of a longitudinally extending wall forming part of the frame, the lugs having apertures which register with an aperture in the wall and the lugs being clamped tightly to the wall by wedges which are tightened against one another and extend through the apertures in the lugs and through the aperture in the wall.

2. A roll table according to claim 1, in which the apertures in the lugs are offset towards the bearing casing from the aperture in the part of the wall between the lugs.

3. A roll table according to claim 2, in which a pair of folding wedges clamps each pair of lugs to the wall and one wedge has fixed to it a screwthreaded pin which projects from its thinner end face, extends through a bore in a stirrup-like extension at the thicker end of the other wedge and is tightened against the extension by nuts.

References Cited UNITED STATES PATENTS 2,391,272 12/1945 Rose 193- 35 2,696,288 12/ 1954 Barry 1 93-3 5 3,252,556 5/ 1966 Isacsson 19335 CHARLES W. LANHAM, Primary Examiner.

H. D. HOINKES, Assistant Examiner.

Claims

1. A ROLL TABLE COMPRISING A SUPPORTING FRAME AND A NUMBER OF CASINGS HOLDING BEARING IN WHICH THE ROLLS ROTATE, WHEREIN EACH BEARING CASING HAS A PAIR OF PARALLEL LUGS WHICH ARE PERPENDICULAR TO THE BEARING AXIS AND WHICH STRADDLE THE TOP EDGE OF A LONGITUDINALLY EXTENDING WALL FORMING PART OF THE FRAME, THE LUGS HAVING APERTURES WHICH REGISTER WITHIN AN APERTURE IN THE WALL AND THE LUGS BEING CLAMPED TIGHTLY TO THE WALL BY WEDGES WHICH ARE TIGHTENED AGAINST ONE ANOTHER AND EXTEND THROUGH THE APERTURES IN THE LUGS AND THROUGH THE APERTURE IN THE WALL.