US1810364A - Guard for presses - Google Patents

Description

June 16, 1931 c. E..MARSHALL GUARD FORPRESSES Filed June '7, 1929 Patented June- 16, 1931.

cnm'roiv n; ivninsnntn or BRooKnYN, Iii-w YORK i f GUARD non ."PR-nssns 7 iApplicatio'n filed me 7, 1929. Serial no; 369,102.

This inventionrelates to presses of various kinds and classes and particularly to What are known asfoot presses-,- and to theprovision of a guard in operative engagement with theplunger OfTthQ PIGSS whereby the guard element may be moved with respect to the dies to forcefully remove a'finger orhand from the path of the dies to prevent injury thereto; and the object-of the invention is it to provide a guard oftheclass a'ndfor the purpose specified in. the form of an -attach- V 1nent.which may' bequickly and "easily.

applied to and coupledwith presses of cone ventional form; a further:objectfbeing to provide a guard attachment of the class speci fied which is soconstructedasto permit the adjustment of the parts thereof to adapt the same tomanyuses or to difi-erent kinds and classes of dies used 111 thepresses; and wlth' these and other ob ects inview, the lnvention consists in a guard attachment 'of the class and for the purposespecified which is simple in construction, efficient inuse; and which is constructed as hereinafter "described and position with respect totlie frame and also 5 to clear the outer face of the plunger l1,"th'e- The invention is fully disclosed in the fol- 1 lowing specification; of wh'ich the accompanying drawings-form a part, in which the separate parts of myimprovement are designatedbysuitable reference characters in each of the views, and in which 7 5 Fig. 1 is a front view of a part of a foot press showing one form of .attachment mounted in connection therewith and indieating the method of its user H Fig. 2 is a side view of the structure in Fig;1.- I a shown Fig. 3 is a view similar to :Fig. 1 but show-'- ing a modification. I

Fig. i is a side view of the structureshown in Fig. 3,'and,. l; p 5 is a 'side'view' of a press similar to that SllOWIl lIl Figs. 1' and 2, illustrating another arrangement of attachment thereon My invention relates to guard attachments" for presses of various kinds and classes, and

for the purpose-of illustrating one use of invention, I have dia'graimmatlcally shown n the accompany ng. draw ngs; portions of a l foot press of conventional form and like references will designate like parts of the press in the several figures. Apart ofthe'bodyI portion or frame of the press is'indicated at 10 in the several figures, and 11 represents a vertically movable 'plunger,, 12 the plunger die; 13 the bedOr -table ofthe press upon which is the lower or stationary die block 14 it being'und-erstood at this time that the'dies. 12and 1% maybe of any desired form and 1 construction.

In Figs. 1 and2 of the drawings,-I"have shown one form of attachment which consists in a bar or strip "15 secured to the upper end portion of the plunger llby screwsor other means 16 and projecting at one side of the press, the free end portion having a P vertical aperture to receive a connecting rod or operating arm 17, the upper end of which isadjustably fixed to the bar 15 by-a set screw or other means 18. A lever19is'pivotally supported in connection-with the frame 10'o n apivot screw20, a spacing member 21 being preferably employed'inwardly ofthe;

leverso as to, arrangethe same in proper- 5 The long ,arm119b' of the lever 19 projects L outwardly at the side of the press and the 7 lower ofiset'po'rtion 17a of the connecting rod 17 rests upon. and cooperates with said end of the lever to control-the operation of the guard arm 22* A spring 24. is preferably coupled with theend 1960f the lever and with the-j frame 10 to holdthe end-19b of theleverin engagement with the rod 17 at all times. I

.A guard arm 22 as seen from the front of the machine, is ofi'set outwardly, downwards" ly and-inwardly and is arrangedto move over the upper face of the die block 14',- and thefend portion ofsaidarm has an inwardly 05;) directed extensio'ri22d, note Fig; 2,- which-is arranged to pass-directly in frontof but clear- 1 ing the die 12. The normal'position of the parts of the attachment is shown in full lin siii-Fig. lwhen'the plunger is in raised" 1 finger of a hand which is indicated in dotted .lines at 25 should the same be'in the path of said arm.

This type of attachment is designed primarily for use in stamping or forming workpieces wherein it iscustomary and necessary to leave one finger of the hand upon the die 14 to support the workpiece in proper position, and my improved guard device will insure the'removal of the finger of a hand, preventing injury thereto, should the finger have been misplaced in the path of the guard or the plunger die. At this time, it will be understood that the lower end portion of the arm 22 may be bent or fashioned to suit any type, kind or class of dies and workpieces requiring support by one or more fingers of the hand during the press operation.

In many uses of presses of the class under consideratiomall that will be necessary will be to move a guard arm transversely with respect to the front of the two dies employed in the machine, so as to remove a finger or head should it accidentally beleft in the path of the dies, and especially the plunger die.

InFigs. 3 and 4 of the drawings, I have shown a form of construction suitable for this purpose. In this construction, Iemploy a bar 26 similar to the bar 15 and which is secured to the plunger--11, and to the outer end of which is adjustably secured a connecting rod 27 operating upon the outer end ofa lever 28 pivoted to the frame 10 as seen at 29, a spring 30 being arranged between the outer end of the lever and the bar 26 to support the lever28 constantly in engagement with the connecting rod 27. a

A guard arm 31 is adjustably secured to the inner end of the lever 28 and extends outwardly, downwardly and inwardly as seen in Fig. 4 of the drawings, the arm normally assuming the position shown in Fig. 3 of the drawings and being adapted to be moved to the right across the vertical center of the dies 12 and 14 in the same manner as the movement of the arm 22so as to remove a finger or hand which may be arranged in the path of movementof said guard arm, it being seen that'the arm 31 extends below the die 14 instead of working over the upper surface. of said die as in the construction shown in Figs. 1 and 2 of the drawings.

In Fig. 5 of the drawings, I have shown another vmodification which consists primarily in arranging the lever and guard arm at one side of the machine rather than at the front thereof so as to control and insure the removal of a finger or hand'whenit is essen tial to feed the work into the dies from one side of the machine rather than at the front of the machine. In this construction, a connecting rod 32 is employed and coupled with a bar similar to the bar 15 or 26 and is offset backwardly and downwardly at one side of the machine to engage the backwardly directed end of a lever 33 pivoted to the frame 10 as seen at 34, a spring 35 being employed to support the lever 33 in engagement with the connecting rod 32; and a guard arm 36 is adjustably sup orted in connection with the forward end of the lever and extends backwardly and downwardly, the lower end of said arm being normally arranged rearwardly of the lower die 14 to permit the free feeding of a workpiece into the die from the side of the press. In the descent of the plunger, the guard arm 36 will move forwardly and across the vertical central path of the plunger die 12 at the side thereof.

From the foregoing, it will be apparent that in the several forms of construction shown, three distinct elements are employed in the attachment, namely thelever to one end of which is adjust-ably secured the guard arm, and the connecting rod operatabl engaging the, other end of the lever an adjustably coupled with the plunger so that the downward movement of the plunger will impart predetermined movement to the uard arm with respect to the dies supported in the press to insure the removal of a finger V or hand to prevent accident or injury thereto.

construction, the attachment may be coupled with and incorporated as a part of the press at a nominal cost and further by virtue of the adjustments provided for the connecting rod and guard arm, the same may be adapted to machines of different kinds and classes and to cooperate with dies of different shapes and forms.

It will be understood that the guard arm of the several attachments shown will operate to engage and remove a finger or. hand prior to the completedescent of the plunger, and will be so timed as to insure the removal of a finger or hand before the same can be caught between the plunger die and stationary die. I

'At this time, it will also be apparent that my invention is not necessarily limited to any particular shape or form of the connecting rod, and. guard arm employed, the same being constructed of rod-like material preferably of a texture which will permit the bending and shaping thereof as well as the rebending and reshaping without danger of breaking the same. While I have showncertain uses of my invention as well as specific structural 7 details of theseveral parts of the attachment,

it will be understood that I am not necessarily limited in these respects and various other changes in and modifications of the 0011- struction herein shown and described may be 1 made within the scope of the appended claims without departin from the spirit of my invention or sacrii oing its advantages.

Having fully described my lnv-ention, what I claim as new and desire to secure by Let-1 ters Patent, is

1. A guard attachment for presses comprising a part adapted to be coupled with the, plunger of the press, a lever pivoted to the lower end of the frame of the press above the bed plate thereof, a guard arm adjustably supported in connection with one end of said" lever and having an offset portion arranged to move lZIfiIlSVBI'SElY'Wltll respect to and adjacent the front of the plunger die of the maintaining said end of the lever in constant engagement with said rod.

2.,A guard attachment for presses comprising a part adapted to be coupled with the plunger of the press, alever pivotedto" the lower end ofthe frame of the press above the bed plate thereof, a guard arm adjustably supported in connection with one end of said lever and having an, offset portion arranged to move transversely with respect to and ad jacent the front of'theplunger die of the press, an operating rod adjustably coupled with said part and extending from said part I I transversely wlth respect to the front of the to said lever and bearing upon the other end of said lever to transmit movement to said guard arm in the descent of the plunger, tensional means coupled with said frame and with the last named end of said lever for maintaining said end of the lever in constant engagement with said rod, and the lower end a portion of said rod beingoft'set to dispose the end thereof'engaging said lever at an inclination thereto when'the plunger of the press is in raised position.

3. A guard attachment for presses comprising two independent and cooperating units, one of said units being supported in connection with the plunger of the press and the other in connection with the frame of the press adjacent the lower end of the plunger, said first named unit comprising a baratshort end portion of said lever and arranged to move transversely with respect to, the plunger die adjacent the die plate of the press and the lower end portion of said rod abutting the long end of said lever, and tensional meanscoupled with the long end of said lever formaintaining the same in constant engagement with the lower end of said rod whereby in the descent of said plunger, said guard arm will be moved transversely of the front of the plunger die of the press.

4. A guard attachment for presses comunits,'one of said units being supported in connection with the plunger of the press and prising two independent and cooperating i the other in. connection with the frame of the press adjacent the lower end of the plunger, said first named unit comprisinga bar attached to the plunger and projecting at one side of the press, and a rod adjustably supported in connection'with said bar and eX- tending downwardly, another unit, comprisnga lever p-ivotally supported to the frame,

said lever having a long endportion and a a relatively short end portion, a guard armed justably supported in connection with the short end portion of said lever and arranged to move transversely with respect to the plunger die adjacent the die plate of the press and the lower end portion of said rod abuttingthe long end of said lever, tensional fguardarm will be moved transversely of the front of the plunger die of the press, and the lower end portions of said rod and arm being offset outwardly and inwardly in a plane press.

In testimony that I claim the foregoing as my invention Ihave signed my name this 18th day of May, 1929.

CLINTON E. MARSHALL.

ice

tached to the plunger and projecting at one side of the press, and a rod adjustably supported in connection with said bar and extending downwardly, another unit comprising a lever pivotally supported to the frame, said lever having along end portionand a relatively short end portion, a guard arm ad-, w justably supported in connection with the

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