US2368478A

US2368478A - Work handling apparatus fob

Info

Publication number: US2368478A
Authority: US
Publication date: 1945-01-30
Anticipated expiration: 1962-01-30

Description

Jan. 30, 1945. w. GNLANDWIER WORK HANDLING APPARATUS FOR MECHANICAL PRESSES Filed Aug. 20, 1941 IVY/(am BY 5 ATT RNEY INVENTOR f2. Zandmmr Patented Jan. 30, 1945 a j i t HANDLING rea so MECHANICAL '=William G. :Landwier, Wellsville, iN. .assignor ite -h A heat x-nota ion, ek ew't grk, #N-

Y I Ap lication .e iaus .a, r 89! 591 li-elaim. (o1. 153-;1) Ihc p esent .inventien rela es to m chanica lit? $9 9 Pa un rso STATES nressesio oeriormiaeoner nietalpletes qieip at ia ala or the likeandpartiellle fl to ppar tusforhant me the .w rk pi ee- When long-s ee h ate arewortes soon press, as to form a flange along oneedgathe major part of the plate overhangs the die and projectsgutwardly frp n the press where it usu ally rests upon a supporting table. When the plate is struck by the punch of the press the outer end of the plate flies upwardly as the punch l6 s e plate as by means strikes. Unless the outer end of the plate is held f a hook l7, ring I 8 and a clamp is applied in this new position, it will drop back to its origthe plate. Cable l6 pa e Over a e v 20 inal level when the punch is released. This is carried on a ock arm 22 projecting outwardly obviously a dangerous condition since it imperils from the pper p r of the framework of the the workmen attending the press. Sometimes it press. At its other end cable I6 is attached to is found necessary to strike the plate again to the drum of a winch 24 driven by a reversible perfect or complete the operation and in such meter 25 50 t a the length of he Cable P instances it is necessary to hold the outer part Out from t e nc may be adjusted to the of the plate in its raised position in readiness amount required for attaching it to the plate. for the re-striking operation. Heretofore a block The'Wiheh 4 is p o ded. with a suitable brake and tackle has been utilized, attaching one end (not shown). The arm 22 is carried by a bracket of t rope to t outer end of t plate and 26 keyed toarock shaft 28 for rotation therewith. having one or more men maintain the rope taut AS Shown in Figure 2, the bracket 6 is p v ed so as to compensate for the movements of the With a, threaded lug through Which a threaded plate. This, however, is not entirely satisfactory n le 32 xt nds so that on rotation of the as among other things t requires th services of latter bracket 26 may be traversed across the additional workmen front of the press so as to locate the arm 22 and The present invention provides an automatic cable is in the desired P t on. handling device for work pieces on which opera- Various mechanisms might be p oye or tions are performed in mechanical presses or simmaintaining torque up n s aft 28 to tension the ilar equipment. Essentially the invention concable It so as to take up the slack in t e latter Y templates attaching the lower end of a cable to as the end of Plate .I flies p dly. F01 i1lus-.

the outer end of the plate with the upper end t e p e s, 1 a 2 s ow a s t r p ate of the cable connected to an arm that projects 35 34 secured to Shaft 28 having at ached from the m; of th press and which is mainthereto one end of a cable 36 whose other end t m under torque by suitable apparatus acting is connected to the piston rod 3'! of an air motor to swing the arm upwardly to take up the slack 38 o whi h compressed air is supplied hr produced in th m as th outer end of t an air line 39. Associated with shaft 28 at its plate flies upwardly. 40 other end is a one-way clutch and brake 40 which The present invention l b t understood acts to hold the arm 22 in its raised position when upon consideration of the following detailed dethe Outer end of plate s upw yy scription of an illustrative embodiment thereof Suitable form of e sab e brake such as shown when read in conjunction with the accompanying in t e Patent issued April 1904,

drawing in which: may be utilized; in Figure 1 there is illustrated Figure 1 is a perspective view of a press em-' a release c d 42 for the brake 40.

bodying the plate handling device of the present Briefly described the operation is as follows:

invention; and When a plate I2 is to have a flange formed along Figure 2 is a front elevational view, partly i its inner edge the latter is positioned between section, of the upper part of the press illustrating the punch l0 and die M with the major portion apparatus for traversing the armor the workof the plate resting on the table l5. .Clamp I9 handling device across the front of the press. is mounted at the outer edge of the p ate and In Figure 1 there is illustrated part of a meconnected by ring I8 to the hook I! at the lower chanical press having a punch or working blade end of cable l6, winch 24 having previously been 10 which is'moved downwardly under great presoperated t D t as h table as q d- I8 is taken up as the arm 22 is moved clockwise under the torque applied thereto by the air motor 38. At this time the brake 40 prevents reverse movement of arm 22 and obviates oscillations of the outer end of the plate l2 and holds it in its upper position even though the supply of air to the :motor 38 might be cut ofi. Hence, a second striking operation, if required, may be performed to complete the operation because the outer part of plate l2 does not fall back on table 15,

When it is desired to remove the plate from the press, the punch I0 is raised and the winch 24 may be operated to pay out cable l6 so as to lower the plate. Alternatively, the supply of air to the air motor 38 may be cut off and its piston cylinder vented. Thereupon the brake 40 may be released by means of the cord 42 so as to permit arm 22 to turn counterclockwise, thereby allowing the outer part of the plate to fall back upon the supporting table.

Although an illustrative embodiment of the invention has been described in detail herein, there are many changes and variations that may be made without departing from the essentials of the invention and, therefore, it is desired and intended to include all such changes and variations within the scope of the appended claim.

What I claim is:

In a mechanical press or the like having a punch and die for performing an operation on a workpiece partly mounted on the die with the major portion of the work piece projecting outwardly from the press, wherein engagement of the punch against the work piece causes the outer end of the latter to fly upwardly; an arm pivotally mounted on the press above its punch and die and projecting'outwardly from the (press in the'same direction as the work piece; a cable connected to said arm and also to said work piec adjacent its outer end; and means continuously applying an upwardly directed force to said arm so as to rock it upwardly for taking up the slack produced in said cable as the outer end of the work piece moves upwardly when the work piece is struck by said punch.

WILLIAM G. LANDWIER.