US1878470A - Safety device for presses - Google Patents

Description

Sept. 20, 1932. F. E. DIAL ET AL SAFETY DEVICE FOR PRESSES Filed Sept. 14, 1928 2 Sheets-Sheet l zzwmzwzazeayemgmm Sept. 20, 1932. I 5 ML ET AL 1,878,470

SAFETY DEVICE FCR PRESSES Filed Sept. 14, 1928 2 Shets-Sheet 2 /0 o F4 Z. 0 11 v FEDMMRMW Q W PatentedSept. 20,'1932' 1,373,470;

UNITED sm'r FRANK E. DIAL Ann ROY R. ROGERS, or TERRE HAUTE, mmiim SAFETY DEVICE non PRESSES Applieation filed September 14, 1928. Serial No. 306,038.

This invention relatesto a guard for use mounted atone-end of the bell crank 11, the in connection with an upright press, the priopposite end thereof being connected with mary object of the invention being to'prothe link12 which also'has connection with vide a guard which will be automatically the vertically movable control rod 13, there r moved to a position in front of the operators being provided a coiled spring'l f surrounda hands on the down stroke of the press, to ingthe link 12 to normally hold the clutch insure against injury to the hands of the opmember in its inactive position. erator should the operator attempt to re- The rod 13 extendsdownwardly and conmove the work'from the machine before the nects with the foot lever 15 which is pressed completion of the down stroke. by the foot of the operator to throw the [:7 Another object of the invention is to pro-' clutch into operation to operate the press. vide a device of this character which will be The guard 1s mounted on the outer end of released when the press has completed its the pivoted arm16, and is indicated by the down stroke, so that the guard will be in a reference character 17, the arm being pivotalvposition to again be moved in front of the ly connected to the frame of the press at 18., work, upon'the next down stroke of the press. Connectedwith the arm 16 is an operating With the foregoing and other objects in rod'il9'th'at also connects with thefoot lever view, which will appear as the description at 20 so that as thefoot lever is pressed proceeds, the invention resides in the comdownwardly to operate the press, the guard bination and arrangement of parts and in is swungfrom aposition as shown in full the details ,ofconstruction hereinafter delines in Fi ure 1,-to aposition as ndicated v known construction, the same being proscribed and claimed, it being understood that in dotted 'li nes.

changes in the precise embodiment of the The foot lever 15 isreturned to its norinvention herein disclosed, may be made mal position-by means'of the rod 21 that con- 251 within the scope of what is claimed, without n ts therewith, there being provided a coiled V departing from the spirit of the invention. spring 22 surrounding the rod to lift the rod Referring to the drawings: 7 and footlever'connected therewith. V A coiled Figure 1 is a side elevational view of an spring 23 has connection'with the arm ,16 to upright press equipped with a guard conreturn the arm toits inactive position. 3O structed in accordance with the invention. Positioned at the front of themachineis Figure 2 is a front elevational view therea pivoted'latch member 245that has an arm of. 1 25 which extendslaterally therefrom, when Figure 3 is an enlarged detail View of the the guard is in its inactive position, as shown latching mech ni mby Figure 2 of the drawings. This arm lies 35-- Figure 4 is a front elevational 719W Ofthe in the path of travel of the arm 16 when'the latching {nechamsm- I I arm 16 moves downwardly, to the end that Referrmg to the drawtngs 1n detall, the the/latch member 24 is moved to a position reference character 5 designates the frame a shown by Figure4 of the r w n Arm of the press, which is of the'usual and well 26 h e and'l-ies inthe-path f travel of upward movement ofthe arm vided with bearings 1n whlch the shaft 6 op- O I c 1 V erates, the shaft supporting the usual power plvotedl 1 adapted i i si Wheel 7 at one n thereofi 1 the latch 24 when 1t has been move 0.1 s

The press includes a vertically movable Q posttloni to temporarily h the 45 member 8 operated by the movement of the late? 24 agalnst movementh 1t W111 shaft 6, there being provided the usual clutch Q Y h 3 fl 16 moves P mechanism 9 for throwing the machine into 1y 1t 1 Contact Wlth the Q I 25 H g the and out of operation. The clutch operating l tch member 24: to a posltion as shown by mechanism embodies the usual fork 10 that Figure 4L,the-latoh member27 acting to hold so'engages the clutch proper, the same being thelatchmember 241 in its locked position, ion

13 fail to move upwardly,

- be further stated M foot lever and power clutch,

' ing' the foot lever and arm to move the arm and guard to their active positions when the,

' foot lever is operated to operate the clutch,

movement of thearm,

with the result that the arm 26 will hold the arm 16 against return movement.

The vertically movable member 8 of the press carries an arm 28 that extends downwardly and laterally and is designed to ride over the curved surface 29 of the latchmember 27 to move the latch member 2'? toits in active position releasing the latch member 24 This action takes place when the vertically movable member 8-reaches the limit of its downward movement, so that the guard and latch members will assume their inactive positions to be operated on the next down stolre V of the c vertically movable member. ported onthe frame of the machine is a pivoted locking arm 80 which is connected with the rod 13 so that as the rod moves down-. wardly, the lower end 310i the locking arm will move to a position directly overthe latch member 2a and hold the latch member against movementas long as the rod 13 is held down, but-when the rod 13 is released, it is obvious that to its inactive position,

releasing the latch member 2 1'.

Since the operatlonof the arm 30 depends.

onthe movement of the clutch actuating rod 13, it will be. seen mechanism become inoperative andthe-rod the locking arm 30 will remain in its active position to hold the guard in its that the'latchfmember 27 is moved'against When the arm 16 moves downwardly, it engages the arm 25 and moves the latch member to a position as shown by Figure 4, in which position the latch member'27 moves J under the lower edge of the latch member 25,

see Figure 4,150 hold the arm 16in its lowermost position. The arm 16 is held in this position until the rod 28 moves over the latch member27 to cause the latch member'27 to disengage the member 24, whereupon arm 16 I arm 26 up-' engages the arm 26, moving the wardly, and returning the latch member 2a toits normal position asshown by Figure 2. This action of course takes place uponthe 7 upward or return movement" of the arm 16,

caused bythe action of the spring 23.

We claim: 1 In a press guard, a frame, a power clutch,

a vertically on one end of the arm ly to a position at the member, a foot lever,

and extended lateralfront of the pressing a rod connecting the a rodconnecta' pivoted latch operated by the downward the member 24 will return 7 that should the clutch 7 active position; It might the tension of the coiled spring-32 so that the latch member is normal-, 1y held in its active position. i

movable pressing member, an arm pivotally mounted onfthe frame,a guard our own, we have hereto aliixed our signatures. c

FRANK E. DIAL. ROY R. ROGERS.

andadapted'to hold

Images