Патент USA US2122648код для вставки
‘July 5, 1938. s. N. JOHNSON 2,122,648 WORK REMOVER Filed Aug. 22, 1955 2 Sheets-Sheet l INVENTOR. 57/4/12 6')’ N JOHNSON BY ATTORNEY. July 5; 1938. s. N. JOHNSON ' ' WORK 2,122,648 REMOVER Filed Aug. 22, 1935 I ‘ 2 Sheets-Sheet 2 £746 INVENTOR. 574NLF)’ N JOHNSON (QM/r7. (74/414 ATTORNEY‘ Patented July 5, 1938 2,122,648 iJNirEo STATES PATENT OFFICE 2,122,648 WORK REMOVER Stanley N. Johnson, Lansing, Mich, assignor to Motor Wheel Corporation, Lansing, Mich., a corporation of Michigan Application August 22, 1935, Serial No. 37,290 1 Claim. (01. 113-50) This invention relates to work removing de vices and particularly to a work removing device for association with intermittently operating work forming machines such as punch presses 5 or the like. It is a’ general object of the invention to pro vide an intermittently operable work removing conveyor to cooperate with an intermittently operating forming machine, and it is a particu lar object to provide such a work removing con veyor which is automatically operable in timed, coordinated relation to the movements of the forming machine, and which is constructed in such a manner as to be self-unloading. 15 It is a further object of the invention to pro vide timing mechanism to effect the automatic, intermittent operation _of the work removing conveyor. In the drawings: Figure 1 is a side elevational view of a punch press of conventional design having the device of the present invention secured thereto in oper ative relation; Figure 2 is a side elevational view of the punch 25 press with the work removing table secured thereto; Figure 3 is a fragmentary elevational view, partially in section, showing the work remov— ing table in work receiving position; punch |'| positioned on the lower side thereof which may cooperate with a die |8 to form the work when the ram I6 is in its lowermost posi tion. As the ram and punch move upwardly the work is carried on the punch and is removed therefrom by stripper plates |9 mounted on the frame I0. ' The work removing device of the present in vention comprises a base 2| suitably secured to the frame |,|l adjacent the path of the ram |6 10 and having spaced vertically extending support ing frames 22 secured thereto which in turn are provided adjacent their upper edges with paral lel channels or guides 23 to receive the opposite edges of a conveyor table 24 reciprocably mount 15 ed to move fore and aft therein. The table may be provided with vertically extending brackets 25 at its forward end for preventing the work, indi cated at 20, from sliding off when the table is moved to the left. 20 A cylinder 26 is secured as at 21 to an upstand ing bracket 28 which in turn is suitably secured at 29 to the base 2|. For alternately recipro cating the table 24, a piston 3| is mounted with in the cylinder 26 and is provided with a piston rod 32 exending outwardly of the cylinder, and which in turn is adjustably and pivotally con Figure 4 is a fragmentary elevational view showing a portion of the timing mechanism in nected as at 33 to an arm 34 intermediate the ends thereof. The arm 34 is pivoted at its upper end at 36 to a boss 31 formed on the under side of the table 24, and at its lower end is provided one position; , with an enlarged longitudinally extending slot Figure 5 is a fragmentary View showing the punch in its upward travel in relation to the 35 work removing table, as shown in Figure 3; Figure 6 is a view of the work removing table similar to that of Figure 3 but showing the table in work delivering position; Figure 7 is a fragmentary elevational view of the timing mechanism in another position from that shown in Figure 4; and Figure 8 is a fragmentary view showing the punch in its downward travel in relative posi tion to the work removing table as shown in 45 Figure 6. Referring now to the drawings, reference nu meral ID indicates the upright, spaced frame members of a punch press having a crank shaft 38 pivotally mounted on. a pin 4| carried by an upstanding boss 42 on the base 2 I, thus providing a lost motion connection for the arm. This lat ter construction prevents binding of the table in its guideways as it is moved fore and aft, and provides a downward pull as the table 24 is started in motion. The power medium for actuating the piston 3| is preferably compressed air but may con veniently be oil under pressure, or any other well known means. Suitable ?uid inlet connections (not shown) are made to a valve casing 44 mounted upon a horizontally extending bracket 45, and a ?uid supply conduit 46 leads from the casing to the interior of the piston cylinder 26 adjacent one end thereof, and another ?uid sup || journaled in the ends thereof and which in ply conduit 41 also leads from the casing 44 to turn is provided with a ?y wheel |2 at either ’ the opposite end of .the piston cylinder 26 and end thereof to receive power from a belt or other communicates with the interior thereof. suitable source. A connecting rod I3 is pivotally For alternately admitting the ?uid under pres mounted upon a crank pin M to be intermittently sure to the conduits 46 and 41, a suitable dual reciprocated by the rotation of the crank shaft valve mechanism is provided and comprises, in 55 and is suitably secured to a ram l6 having a the present instance, a valve casing 44 and a 2 2,122,648 guide plate 48 mounted at its center as at 49, and ‘provided with vertically extending valve operating rods 50 and 5| on either end thereof, ' which extend through the guide plate 48 and operate the valves in the valve casing 44. For alternately actuating the dual valve mech anism to in turn cause the table 24 to be re mentum of the work 20 carries it o? the table on to a suitable conveyor or into a container, not shown. As soon as the table 24 moves to the left the ram Hi again moves downwardly to engage the Cl die [8 and the cycle of operation is repeated. The work remover is equipped with a safety device to prevent the return of work 29 with table 24 if for any reason the work is not dis charged from the table on its outward movement. ram l6 of the punch press, a timing and valve V10 actuating mechanism is provided which com This device consists of a safety arm 'i5 fastened . prises a pair of cams 52 and 53 adjustably secured . to. a shaft 14. Shaft 14 is rotatably mounted in to an extended portion Ila‘ of the crank shaft supports 73 which are attached to frame meme II and relatively positioned thereon so that‘ one bers 22. A stop arm 16 is secured to one end cam surface follows the other to provide the of shaft ‘[4. 'It is adapted to contact a stop pin necessary timing. A pair of push 'rods 54 and 55 ‘ 11 attached to support 13. When the table 24 moves work 29 out from are reciprocatably mounted in a bearing bracket 56 carried by a vertically extending member 56a under the press on the outward movement of the which in turn is mounted on the bracket 45. table, the work strikes arm 15 lifting it sufficiently Each of the push rods 54 and 55 is provided with to permit the work to pass under the arm. After a cam follower 51, which in the present instance the work has passed underarm 15 the arm drops is a roller journaled in the bifurcated ends 58 of back to the position shown in Figure 2 and thus the push rods. Adjustable tappets 59 and 61 are prevents work 29 from being carried back under mounted in the ends of push'rods 54 and 55 and the press in case it is not properly discharged from table 24. Stop arm 16 and pin 11 serve to ' reciprocate with the rods. Bracket 62 is secured to the vertical member 55a. Compression springs limit the rotary movement of arm 15, thus pre 63 and 64 are positioned betweenspaced spring venting the possibility of it beinglifted so far seats 66, 67, 6,8 and 69,, the upper spring seats 68 that it will not fall back in place after the work has passed beneath it. a , and 59 being adapted to be engaged by the en It will thus be seen that a completely auto larged portions ‘II and ‘i2 of the push rods 54 and 55. The lower spring seats 66 and 6.1 engage matic device is provided for removing work from forming machinery. The device automatically the bracket 62. In operation, the ram [5 carrying the punch receives the work, conveys it from 'themachine, automatically unloads itself and'return's to re i1 is reciprocated by the crank shaft It to inter mittently engage the die i 8 to form vthe work. ceiving position. A precision timing andactuat As the ram I B and punch I‘! are moved upwardly, ring mechanism is provided together withrmeans the work 20 is removed from the punch I‘! by for closely adjusting the entire ‘mechanism to ciprocated fore and aft in coordinated, timed re lation to the intermittent movements of the the stripper plates [9 and drops therefrom. Just prior to the removal of the work from the punch, the cam 52 on, the crank shaft engages the cam follower 5‘! of the push rod 54 to force the tappet 59 into engagement with the valve stem push rod 50, thus opening the valve. Compressed air is thus admitted to the supply conduit746 from the valve casing 44, and enters the cylinder 26 ‘ at one end of the piston 3|, forcing the piston to the right and in turn moving the lever arm 34 to the right carrying the table 24 within its guides ways 23 also to the right, into the position shown in Figures 2 and 3 to receive the work 20 as it is stripped from the punch l1. - As soon as the work drops on the table, th cam surface 53 engages the follower 51 on the _ 20 25 35 operate the work removing table quickly and in tel-mittently in coordinated, timed relation to the movements of the work forming member of the machine. . ' l 7 Various modi?cations in the construction and ' design of the conveyor device as shown and de scribed and numerous adaptations of the device may be made to the various types of work form 45.5 ing machines without departing from the spirit ‘ ~ or scope of the invention which is to be limited onlyby the appended claim. I claim: . ' V In a work removing device, a base,,a supPQrt v5.0 ing member secured to said base, a conveyor table reciprocably carried by said supporting member, an arm pivotally secured at one end to ‘said table and having at its other end a lost mo: tion pivotal connection to said base, a piston, a connecting rod connected to said piston and '7 secured to said arm intermediate its ends,.and means for alternately applying fluid pressure to push rod 55 to engage tappet 6| with the other Valve stem push rod 5!, thus opening the valve to provide ?uid communication from the valve casing 44 to the supply conduit 41, which in turn supplies compressed air to the opposite end of the piston 3i, forcing it to the left to pull the ‘each. end of said pistonto alternately reciprocate to lever 34 and table 24 quickly to the left. The said table in opposite directions.‘ piston 3!, and therefore the table 24,, stop quickly ' in the position shown in Figure 6, and the mo STANLEY ‘N. JOHNSON.