US2498989A

US2498989A - Pile stop mechanism

Info

Publication number: US2498989A
Application number: US31496A
Authority: US
Inventors: Gustave G Erland; Axel B Pearson
Original assignee: Carnegie Illinois Steel Corp
Current assignee: Carnegie Illinois Steel Corp
Priority date: 1948-06-07
Filing date: 1948-06-07
Publication date: 1950-02-28
Anticipated expiration: 1967-02-28

Description

Feb. 28, 1950 G. G. ERLAND ET AL PILE STOP MECHANISM Filed June 7, 1948 2 Sheets-Sheet 1 INVENTOR. GU'STAVE s. ERLAND, a Y AXEL B. PEARSON ATTORNEY Feb. 28, 1950 G. G. ERLAND ET AL 2,498,989

PILE STOP MECHANISM 2 Sheets-Sheet 2 Filed June 7, 1948 INVENTOR. GUSTAVE G. ERLAND a AXEL B. PEARSON i mandfix ATTORNEY Patented Feb. 28, 1950 PILE STOP MECHANISM Gustave G. Erland and Axel B. Pearson, Pittsburgh; Pa., assignors to Carnegie-Illinois Steel Corporation, a corporation of New Jersey Application June 7, 1948, Serial No. 31,496

7 Claims. (Cl. 271-86) 1 This invention relates to stop devices used with sheet piling apparatus for aligning vertical edges of sheets as they are piled.

An object of the invention is to provide improved and simplified stop devices embodying a stop bar which is readily projected for aligning sheets during piling or retracted for removing finished piles of sheets.

A further object of the invention is to provide improved stop devices which have a retractable stop bar for aligning sheets and which are bodily movable to accommodate sheets of difierent lengths and in which actuation of a single mechanism projects or retracts the stop bar and simultaneously locks the device in a fixed position or releases it for movement.

A further object of the invention is to provide improved stop devices having the foregoing features in which the operating mechanism is of simple and rugged design and dependable in its operation.

In accomplishing these and other objects of the invention, we have provided improved details of structure, a preferred form of which is shown in the accompanying drawings, in which:

Figure l is a side elevational view of an improved stop device embodying features of the present invention, the housing being broken away to illustrate the operating mechanism;

Figure 2 is a vertical sectional view taken substantially on line II--II of Figure 1;

Figure 3 is a horizontal sectional view taken substantially on line III-III of Figure 2; and

Figure 4 is a horizontal sectional view taken substantially on line IV-IV of Figure 1.

Referring more in detail to the drawings;

The stop device of the present invention is illustrated in conjunction with a sheet piler which stacks sheets S from above on rails ID. The piler is not shown, since it may be of any known design and per se is not partof the present invention. A pair of spaced apart roller tables l2 and It Support rails In so ,that they may be shoved easily for removing heavy stacks of sheets.

The stop device, designated H, is situated between and beneath the two roller tables and may conveniently be in a pit l5 beneath floor level, as illustrated. The stop device is carried one track, which in the installation illustrated includes I-beams l6 and I1 and rails l8 and I9 mounted on said I-beams. The I-beams are supported from columns 20 and 2| that mount the inner sides of the roller tables.

opposite sides of which carry pairs of

rollers

23 and 24. Said rollers ride on rails l8 and I9 and thus support the device for adjustment longitudinally with respect to the roller tables.

Eyelets

25 and 26 are fixed to the front and back walls of thehousing and are adapted to receive cables or other tow means for moving the stop device along the rails.

A vertically movable stop bar 217 is supported in

guides

28 and 29 in the forward portion of housing 22. The stop bar may be retracted S deposited on rails iii abut the stop and thus The stop device comprises a. housing 22, the II are piled with these edges vertically aligned. Preferably the region of the stop bar engaged by the sheets is cushioned, as indicated at 30, to ease the shock of such engagement. As shown in Figure 4, the cushioning comprises a metal stop plate 30a, a rubber cushion 30b and an attaching key 30c, which enables the cushion to be replaced conveniently when worn. When the stop bar is projected, it also furnishes a means for gauging the height of the stack. The device has locking means, hereinafter fully described, for automatically fixing the position of the device whenever the stop bar is projected and releasing the device for free movement whenever the top bar is retracted.

The operating mechanism for projecting and retracting the stop bar and engaging or releasing the locking means comprises a double acting pneumatic cylinder 3| which contains a reicprocable piston. The cylinder is fixed in a bracket 32, which is pivotally supported on the housing walls at 33. The cylinder has the usual hose connections for admitting air and may be actuated by any suitable valve mechanism, not shown. A toggle 34 is pivoted to the housing walls adjacent the rear at 35, to the piston rod at 36 and to the stop bar at 31. 'The toggle is slotted where it is pivoted to the stop bar to permit the latter to move in a straight line while the former moves through an arc. Whenever the piston is forced upwardly, toggle 34 projects the stop bar, and whenever the piston is forced downwardly, the toggle retracts the stop bar.

The locking means previously referred to includes a yoke which has

upstanding arms

38 and 39 and a base bar 40 (Figure 2). Ifhe upper ends of

arms

38 and 39 are. apertured and the inner walls of the housing have opposed slotted brackets 42 and 43 (Figure 3). Pins 44 and 45 pass through the apertures in the yoke arms and through the slots in

brackets

42 and 43 and thus support the yoke for vertical movement. The extremities of base bar 40 extend beneath I-beams l6 and I1 and carry shoes 46 and 41 which are engageable with the bottom flanges of the I-beams to efiect part of the locking action.

An actuating rod 48 depends from toggle 34 between

pivot points

35 and 36 and has a slotted connection therewith.

Bifurcated levers

49 and 50 are pivotally attached to the lower end of actuating rod 48 on a pivot pin Said levers receive

arms

38 and 39 of the yoke within the bifurcations and are apertured for passage of

pins

44 and 45, (Figure 3). The outer ends of

levers

49 and 50 are engageable with tops of rails l8 and 19 (Figure 2) to effect the remainder of the locking action. Thus the locking means engages opposed faces of the track to effect a positive locking action.

When the piston in cylinder 4| is forced upwardly to project the stop bar, actuating rod- 48 alsois lifted. Lifting said rod pivots levers 49 and 50 about

pins

44 and 45 and thus their outer ends are moved down into engagement with the tops of rails l8 and IS. The pivotal connections are sufiiciently loose that the levers can pivot while the rod is moved in a straight line. At the same time the levers lift the yoke and carry shoes 46 and 41 up into engagement with the undersides of the I-beams. These locking movements occur simultaneously with projection of the stop bar. The reverse of these movements takes place when the piston is forced downwardly.

In operation, the device is adjusted along rails l0 until the stop bar is situated beneath the line along Which it is desired to align the forward edge of a pile of sheets. The pneumatic cylinder is actuated to project the stop bar and simultaneously lock the device in position. Sheets are then piled on rails I0, and they abut cushion 30 on the stop bar as they are piled. Normally sheets are piled until the pile reaches a height equal to the distance the stop bar projects above the rails, the stop bar thus furnishing a convenient means for gauging pile height. The pneumatic cylinder then is actuated to retract the stop bar and release the locking means from the rails. The sheets then may be shoved along the roller table for removal. At the same time, the device is released for adjusting to a difierent position if desired.

From the foregoing description it is seen we have provided a stop device having improved and simplified mechanism for projecting or retracting the stop bar and simultaneously fixing the position of the stop-device or releasin it for movement along the track.

While we have shown and described only a single embodiment of the invention, it is apparent that modifications may arise. Therefore,

- we do not wish to be limited to the disclosure set forth but only by the scope of the appended claims.

We claim:

1. A stop device comprising a housing, rollers on said housing for supporting the housing on a track, locking means extending from said housing and being adapted to engage the track for fixing the position of the housing, a stop bar movably carried in said housing, a toggle pivoted in said housing and operatively connected with said locking means and said stop bar, and pneumatic means in said housing for pivotally moving said toggle, movement of said toggle projecting or retracting said stop bar and simultaneously engaging or releasing said locking means.

2. A stop device comprising a housing, rollers on said housing for supporting the housing on a track, locking means extending from said housing and being adapted to engage the track for fixing the position of the housing, a stop bar carried in said housing and being movable vertically, a toggle pivoted to said housin and to said stop bar, means operatively connecting said toggle with said locking means, and pneumatic means in said housing for pivotally moving said toggle, movement of said toggle projecting or retracting said stop bar and simultaneously engaging or releasing said locking means.

3. A stop device comprising a housing, rollers on said housing for supporting the housing on a track, locking means extending from said housing and being adapted to engage opposed faces of the track to effect a positive locking action for fixing the position of the housing, a stop bar carried in said housing and being movable vertically, a toggle pivoted to said housing and having a slotted pivotal connection with said stop bar, actuating means operatively connecting said toggle with said locking means, and pneumatic means in said housing for pivotally moving said toggle, movement of said toggle projecting or retracting said stop bar and simultaneously engaging or releasing said locking means.

4. A stop device comprising a housing, rollers on said housing for supporting the housing on a track, a vertically movable member carried by the housing and being adapted to engage the underside of the track, a lever pivoted to said vertically movable member and to said housing and being adapted to engage the top of the track, a stop bar carried by said housing and being movable vertically, a toggle pivoted to said housing and having a slotted pivotal connection with said stop bar, an actuating member connecting said toggle and said lever, and pneumatic means in said housing for pivotally moving said toggle, movement of said toggle projecting or retracting said stop bar and simultaneously moving said vertically movable member and said lever for engaging them with the track or releasing them therefrom.

5. A stop device comprising a housing, rollers on opposite sides of said housing for supporting the housing on a track, a vertically movable member carried by the housing and being adapted to engage the under-sides of the track, levers pivoted to said vertically movable member and to opposite sides of said housing and being adapted to engage the top of the track, a stop bar carried by said housing and being movable vertically, a toggle pivoted to said housing and having a slotted pivotal connection with said stop bar, an actuating member connecting said toggle and said levers, and pneumatic means in said housing for pivotally moving said toggle, movement of said toggle projecting or retracting said stop bar and simultaneously moving said vertically movable member and said levers for engaging them with the track or for releasing them therefrom.

6. A stop device comprising a housing, rollers on opposite sides of said housing for supporting the housing on a track, a vertically movable yoke having a base bar and upstanding arms, means on said base bar adapted to engage the underside of the track, a pair of levers extending from opposite sides of said housing and having slotted pivotal connections with said housing and with the arms of said yoke, the outer ends of said levers being adapted to engage the top of thetrack, a stop bar carried bysaid housing and being movable vertically, a toggle pivoted to said housing and having a slotted pivotal connection with said stop bar, an actuating bar connecting said toggle and the inner ends of said levers, and pneumatic means in said housing for pivotaily moving said toggle, movement of said toggle projecting or retraoting said stop bar and simultaneously pivoting said levers and moving said yoke for engaging them with the track or for releasing them therefrom.

7. A stop device comprising a housing, rollers on opposite sides of said housing for supporting the housing on a track, a vertically movable member carried by the housing and being adapted to engage the undersides of the track, levers having slotted pivotal connections with said vertically movable member and with said housing and being adapted to engage the top of the track, guides in said housing, a stop bar carried in said guides and being movable vertically,

levers for engaging them with the track or for releasing them therefrom.

GUSTAVE G. ERLAND. AXEL B. PEARSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,235,347 Zahutnick Mar. 18, 1941- 2,315,003 Martin et a1 Mar. 30, 1943 2,456,004 Larkln Dec. 14, 1948