Патент USA US2868592код для вставки
Jan- 13, 1959 P. J. LOISELL MATERIAL HANDLING DEVICE Filed Dec. 51.‘ 1954 ‘ 2,868,582 _ 2 sheets-sheet 1 Jan, 13, 1959 ' ' 2,868,582 P. J. LOISELL MATERIAL HANDLING DEVICE! Filed Dec. 31. 1954 2 Sheets-Sheet 2 mum“ a?wzfillir - "@*Q%EY United States Patent 0 C6 1. 2,868,582 Patented Jan. 13, 1959 rs 75. extends rearwardly in a direction opposite to that of the 6 base plate 44. Motors Corporation, Detroit, Mich., a corporation of Delaware . . ‘ Application December 31, 1954, Serial No. 479,084 2 ‘Claims. (Cl. 294-88) An air cylinder 48 is also secured to the support member 46 and extends rearwardly thereof with the rod 42. A piston rod guide plate 50 is secured to the face of the support member46 by fastening means 52 and has a piston rod 54, actuated by air pressures applied within the air cylinder 48, extended therethrough. The piston 2,868,582 MATERIAL HANDLING DEVICE Paul Joseph Loisell, Flint, Mich., assignor ‘to General rod 54 includes a forked arm connector 56 at the extended .10 end thereof engaging a carrier 58 and secured thereto by pin 60. . The carrier 58 is formed to include a relieved section on its undersurface as at 62. and ?anged side rails 64 and 66 by means of which it may be slidably disposed This invention relates to material handling devices in 15 upon the base plate 44 and guided within guide rails 68. general and more particularly to devices for ejecting or withdrawing stamped members ‘ from metal stamping presses. ‘ and 70 secured to each side of the base. The carrier 58 also includes parallel spaced side walls 72 formed to pro vide guide walls 76 and 78 near one end thereof and pivot ' The removal of metal stampings from large stamping pin support walls 80 and82, and 84 and 86, near the presses when performed manually is a dangerous opera 20 other end thereof. A control rod‘ 88 has one end dis tion. Numerous means'have therefore been proposed posed between the guide walls 76 and 78 and is retained for automatically ejecting the stamped members from ' by a pin 90 extended through the rod and received within such presses without requiring that the operator expose guide slots 92 and 94 formed within the walls. The himself to danger. Such devices include the Sahlin Iron other end of rod 88 is threaded within a member 96 Hand shown and described in the United States patent 25 having fork arms 98 and 100 with pin 102 extended to Sahlin 2,275,561.‘ ‘ The proposed device is an improve therebetween. A bell crank lever 104 is pivotally sup me'nt over the mechanical hand used with the Sahlin ported upon a pivot pin 106 extended between walls 80 apparatus and includes a more e?icient work jaw oper and 82. One end of the bell crank lever 104 is engaged > ating means and a more satisfactory arrangement of the .upon pin 102 and the other end thereof includes a pin 30 work engaging jaws themselves. ‘ 108 engaged within the forked arms 110 of a jaw mem In the drawings: ‘ her 112. Figure 1 is a showing of an automatic mechanical arm having the proposed device adapted for use therewith. walls 84 and 86 upon a pivot pin 114 and is engaged with the, bell crank lever 104 by means of slots 116 formed in the- forked arms 110 thereof and adapted to receive Figure‘2 is a side elevational view of the proposed material handling device; Figure 3 is a side elevational view of the proposed pin 108‘. The jaw member 112 is, hook-shaped having device as employed to engage a work member. ‘Figures 4 and 5 are‘ ‘cross-sectional views‘ taken in the planes of lines 4-4 andv 5-5, respectively, of Figure 2 looking in the direction of the arrows thereon. The automatic mechanical arm apparatus 10 shown in Figure l is generally adapted to be secured to the side . The jaw member 112 is pivotally supported between its workpiece engaging end 118 adapted to engage a work engaging member 120 secured to the end of the carrier 58. . 40 A spring member 122, under compression, is engaged 1 between the carrier 58 and the end 124 of rod 88. The spring member 122 is received within a passage 126 formed through the end of the carrier 58 and closed by a plug 128 threaded therein. The spring biases the rod extended downwardly with the pick-off or ejector device axially to the extent allowed by pin 90 within guide 14 adapted to reach inside the press to engage a work 45 slots 92 and 94 to move bell crank lever 104 so as to piece. The stamping press is not shown. maintain the jaw member 112 in the position shown in The apparatus 10 comprises a control housing 16 in Figure 2. cluding an air cylinder 18 and having the air cylinder A collar member 130 is secured to rod 88 and has a rod 20 connected to a carriage member 22. The carriage pin 132 extended therethrough and exposed on each side 50 member 22 has a bell crank 24 pivotally mounted thereon thereof. The side walls 72 and 74 of the carrier 58 are of a stamping press and to have the arm 12 thereof as at 26. The bell crank 24 includes a cam follower roller 28 which is adapted to engage and follow the cam surface 30 of the housing as the carriage 22 is raised vertically by air cylinder rod 20. The arm 12 is secured to the end of the bell crank 24 and includes an. arm cut away as at 134 to receive the pin and allow limited travel within the extent allowed rod 88. Stop lugs 136 and 138 are secured upon guide rails 68 and 70 near 55 one end of the carrier 58, and on opposite sides thereof, for engaging pin 132 and limiting relative movement between the carrier 58 and base plate 44. The limited travel allowed the carrier and base plate is shown in Figure 3. The engagement of lugs 136 and 138 with pin 132 causes the control rod 88 to be prevented from further movement with carrier 58. As the carrier con A ?xture 36 is secured to the end of the arm exten tinues its outward movement, control rod 88 acts upon sion 32 for holding the ejector device 14. The ?xture bell crank lever 104 to close the jaw member 112 upon any 36 includes a screw adjustment means 38 for regulating workpiece such as 140 disposed between the end 118 of the angular disposition of the ejector device 14 relative 65 the jaw and the work engaging member 120. to arm 12 and a clamp means 40 slidably engaging a In the operation of the automatic mechanical arm rod 42 of the ejector device for regulating the stroke apparatus 10 the air cylinder rod 20 is adapted to lift length of the device towards the workpiece. the carriage member 22 causing the cam follower roller The ejector device 14 includes a base plate 44 with a 28, in following the cam surface 30, to pivot the bell support member 46 secured to one end thereof. The 70 crank 24 about its pivotal point 26 raising the end of rod 42, with which the arm 12 of the apparatus 10 is the bell crank and causing the arm 12 to remove the‘ extension 32 telescoped therein and adjustable with re spect thereto by means of the adjustment screw 34. A dash pot cylinder 35 and cylinder rod 37 are secured between the housing 16 and carriage member 22 to cush 60 ion the end travel of the carriage member. connected, is secured to the support member 46 and ejector device 14 from within the stamping press. The 2,868,582 3 reverse operation disposes the ejector device within the stamping press. As the ejector device 14 is positioned within the stamp ing press the air cylinder 48 is actuated causing the piston rod 54 to move the carrier 58 relative to the base 5 plate-44. Thestroke of the ejectordevice-14 is adjusted so that the work engaging member 120 secured to ‘the pinging engagement with said control linkage ‘for over» coming said biasing means and activating said control linkage to close said jaw member against the terminal end of said carrier. 2. A work handling device for use with automatic mechanical arm apparatus and which includes a base member adapted to be secured to said arm apparatus, a carrier member slidably mounted upon said base member, end of the carrier will engage ‘the workpiece 140 at the a work engaging surface provided at the terminal end end of its relative movement. The piston rod 54 in moving the carrier 58 relative to the base plate 44 causes l0 of said carrier, a work engaging jaw ‘member pivotally mounted near the end of said carrier, a bell crank actu the pin 132 to be engaged by the stop lugs 136 and 133 ator link pivotally mounted upon said carrier and hav secured to ‘the base plate. Further forward movement ing one end thereof connected to said jaw member, a ofthe carrier member causes the lugs to move the vcon control rod having one end connected to the other end trolrrod 88 relative to carrier 58 through collar 1130, of said actuator link, power biasing means mounted in against ‘the action of the biasing spring 122. Axial v and engaged between said carrier and the other end of movement ofthe rod-88 relative to the carrier 58 is trans said control link for retaining said jaw member in ,an lated through the bell crank lever 104 to cause the work open position through the ‘biased disposition of said engaging end 118 of the jaw member to engage the work control and its e?ect upon said actuator link, piston piece 140 against the end of the carrier member. cylinder'means connected to said carrier ‘for moving said The carrier 58 may be returned to its original position carrier relative to said base member, and stop means with respect to the base plate 44 by means of the air provided near the end of said base member for engaging cylinder 48 at the same time that the mechanical arm said control rod and moving said rod relative to said car apparatus. is adapted to withdraw the ejector 14 from rier for closing said jaw member against the work engag within the stamping press, or at such other time as is ing surface of said carrier and engaging a work member‘ convenient and allows the apparatus to ready itself for therebetween, said ‘work engaging surface and said jaw picking off the next stamping from the press. member being juxtaposed when closed to hold said work I claim: member in-a plane at the point of engagement normal'to 1. A work vhandling device for use with automatic the lineof movement of said carrier member. mechanical arm’ apparatus and which includes a base member adapted to be secured to and supported by said References Cited in the ?le of thispatent arm apparatus, a carrier member slidably mountedupon said base member,-a work engaging jaw member pivotally mounted ‘upon one end of said carrier and adapted to hold a workpiece to the terminal end of said carrier, 35 work jaw control linkage carried 'by said slide member and connected to said jaw member, power means on said carrier member biasing said control linkage to retain said jaw member in an open position, piston cylinder means secured to said base member and connected to 40 said carrier for moving said carrier relative to said base member, and stop lug means mounted adjacent the end of said base member and disposed for cooperative im UNITED STATES PATENTS 2,275,561 Sahlin ______________ __-_ Mar. 10, 1942 2,609,776 2,677,342 .Sahlin ________________ __ Sept. 9, 1952 Miller ________________ __ May 4, 1954 2,781,136 Sehn et a1.‘ ____________ __ Feb. 12, 195.7 1 OTHER REFERENCES A publication by Sahlin Engineering C0,, P. O. ,Box ' 289, Birmingham, Michigan, entitled “Sahlin ‘Iron Hand Unloading‘Machines”; 16 pages. Page 16 indicates a printing'date of January 1954.