Патент USA US2404675код для вставки
My 23, 19%;. A E WSBURG ' ZAM?WS SAFETY vGUARD ‘ Filed Dec. 11, 1943 _ FIG. u _ HNVENTOR ALAN E. VQSBURG I BY J FIG. 3 ' ‘ I’. ' _ VATTQRNEY } Patented July 23, 1946 2,404,675 1 .UNITED- STATES PATENT, OFFICE SAFETY GUARD Alan E. Vosburg, Chicago, Ill., assignor to Tele type Corporation, Chicago, 111., a corporation of Delaware Application December 11, 1943, Serial No. 513,981 ' 3 Claims. (01. 74-615) 1 This invention relates to safety appliances and 2 The present safety apparatus comprises, in gen more. particularly to a safety guard to protect an operator duringv the use of hazardous machinery, such as punch presses and the like. eral, an upper plate vwhich is securely fastened to the reciprocating part of the machine onwhich relatively small piece parts, it is frequently neces sary that the piece parts he successively fed to various points thereon whereat the operation is to be performed. While there have been many devices proposed to impart automatic stepping cured to the lower die shoe, and a plurality of it is used, which part may secure a punch or ‘ During machine operationson various types of Va the like, a lower frame which is removably se motion to the piece parts, in many cases it is necessary that the step-by-step feeding be done manually. . springs extendingbetween the upper plate and 'the lower frame. Thus, the plate, frame, and springs form a compact unit which is a constant protection to the operator but which may be ' placed adjacent the ‘working parts of the ma chine, inasmuch as the upper plate is designed to reciprocate with the tool holder to which it is secured while the lower frame is designed to ,At the present time there has been perfected many different types of safety appliances to be 15 be stationary, resulting in a constant extending ' utilized with machinery such as punch presses and and compressing of. ‘the springs therebe-tween. the like, for the protection of the operator. Prob The features and advantages of the invention ably the best known types are of the cage variety will become apparent from the following detailed which extend completely around the reciprocat description of a speci?c embodiment thereof, when ing tool holder and tool of the machine and are 20 read in conjunction ‘with the following drawing either raised upwardly or have a pivoted opening by means of which the piece parts may be moved in which: > . after the machine operation, and the swinging Fig. 1 is a detailed perspective view, partly broken away, of the device embodying the inven arm type which is simply a pivoted arm which au tion as attached to a power punch press; ‘ tomatically reciprocates from side to side be 25 Fig. 2 is a detailed view of the upper plate tween the operator and the operating machine forming part of the invention, as viewed by look parts during-operation thereof. While it is true ing upwardly, as in Fig. ‘1; and that‘these devices work satisfactorily, it is neces Fig. 3 is an enlarged perspective view, partly sary that they be built well away from the re broken away, showing the connection between ciprocating tool of the machine which, therefore, the device embodying the invention and the base precludes theoperatorfrom keeping his hands to which it is connected. adjacent the tool during operation. This is a The present invention has been illustrated and distinct disadvantage in that machinery that is will be described as being used in connection used to operate on small parts is often provided with a power punch press. However, such an ap with manual piece part feed means, which ne 35 Dlication has been used for the sake of illustra cessitates the machine operator having his hands tion only and it is to be understood that the close to the moving tool. Thus, such a safety de invention is applicable to many other types of ‘vice could not be used on machinery having the industrial machinery. ‘ above-mentioned feed means. As shown in Fig. 1, the punch press comprises Accordingly, the object of this invention is to 40 a basal! on which is securely positioned a die provide a safety apparatus which while serving shoe H, by means of any suitable fastening de to protect the machine operator allows the 0p vices (not shown). The die shoe l2 has an up— erator’s hands to be in close proximity to the wardly extending circular section [3 which. is reciprocating tool holder and tool of the ma smaller in size than the outer contour of the 45 base‘of the die shoe. Rotatably positioned around chine. The invention consists of an elastic cage which, the upwardly extending portion l3 of the die shoe under all conditions of a reciprocating‘ tool hold I2 is a feed ring [4 which may be manually po er, provides a barrier against inadvertent expo sitioned by means of three upwardly extending sure of an operator’s hands to injury by the tool rods 16.‘ A segment ll of the feed ring I4 is and die elements. Such precautions are aggre~ 50 formed on its front edge with a series of notches vated in the case of code segment punching where 18 ‘which serve as guides for successive feeding an arcuate piece part is variously positioned as a movements of the ring [4. A post [9 is mounted code notch cutting punch is operated to remove on the die shoe 12, carrying a pawl 2|! towards various peripheral sections according to the par its top and having aspring 22 thereon normally 65 urging the pawl in a clockwise direction, as viewed ticulars . of , a coded element; 2,404,675 3 4 . in ‘Fig. 1. The pawl 2| is positioned in line with shoulder 3| and is smaller in diameter than either and adjacent the segment I‘! of the feed ring 14 the head or shoulder, riding in the slot 49. As the slot 49 is just slightly wider than the stock 33 the, and is utilized to engage the notches ill in the segment l'l, thus holding the feed ring I4 in the frame 46 cannot pass up over the head 32 nor position to which it has been set. A pin 23 is 5 down over the shoulder 3|. The frame is thus mounted to the die shoe l2 and will resist any mounted on the die shoe l2 and acts as ‘a limit to the outward movement of the pawl‘ 21 when the vertical. motion". In order to remove the frame 45 operator manually rotates it in a counterclock wise direction, as viewed in Fig. 1, against the tension of the spring 22, in order to release its-1e end from a notch I8 and thus be able to position._ the feed ring I4 to the next notch. This is done successively throughout thew-number ofnctches, _ it is only necessary to impart horizontal motion to the frame to the extent that the circular open ing 48 will be positioned in alignment with the head 32 of the locating pin 29, the frame then being lifted over the head of the locating pin 29. A plate 51, as shown in Fig. 2, is formed with a circularopening; 52, three small screw openings A piece part 24 is located in place on the feed 15 in which are; shown screwsv 53, and a ?ange 54 IS in the segment I1. , . ring 14 by means of two pins 25 which pass through two holes in the piece~~part 24. Asthe piece part 241s arcuate in shape two guides. 21, are provided, one near either end of the piece part, in order to more securely hold the piece part in place. for the punching operation. The guides 21* are. secured to the feed ring l4.‘ by any suitablemeans (not shown) . The speci?c'piece part 24 which hasbeen il extending from all four sides of the plate 5|. The plate is designed'to be positioned above the punch block 4|, the cylindrical member by which the punch block is held in the upper block 36 and which is not shown in the present drawing pass ing through the circular‘opening 52. Theplate 5| is then securely fastened to‘the punch block 4| by means of the screws 531 which pass through the screw holes in the plate. The plate is shown lustrated in. the: drawing is a. blank which is to 25 after it has been secured in position in Fig. 1, be formed witha seriesv of notches of various sizes wherein the ?ange 54‘ is shown as‘ extending and at various. points in the edge having the smaller radii. After manufacture, this particu downwardly, lar. piece part, is- used as a. code. bar in printing 54 have a series of aligned openings therein formed at spaced intervals the entire length of telegraph apparatus. Four locating pins- 29 are securely fastened 1 within. the circular upwardly extending portion l.3.of the die. shoe [2. As‘- more clearly- shown in Fig. 3,. the locating. pins 29;. are formed with a Both: the lower ?ange 41' and the upper ?ange the flanges. A series of springséBB having hooked ends engage the openings and extend between the upper plate 5! and lower frame 41. The springs 56 should be so made‘ thatrwhen the upper block shoulder 3|, a head 32, and a-metal stock 33sep arating they head and the shoulder but being less 35 is in its upward position, at which-time no punching occurs, the springs are extended. in. diameter than the head or- shoulder. The During the operation of the punch press, the utility. ofithe locating pins will be. explained here upper member 36; and the-parts secured there to, move downwardly to a point- at which the inafter. ASaELlSO; shown in. Fig. 1, a. punch holder 364 is 40 punch 42 notches the piece part 24. During this illustrated as being above the members just de operation the'springs 56 will no longer be held scribed, and separated therefrom. The punch under tension but instead will be put under‘ a cer holder 3iiqhasva. block 31 positioned at the front, tain' amount of compression which may cause which is secured. tothe punch: holder by, means the springs to buckle inwardly, outwardly, or to of bolts 38. and tightened thereon by means of 45 ward the sides; However, because of- the great nuts_3~9. Upon. loosening the nuts- 39git is possible number of springs used and the relatively small to insert an upwardly extending cylindrical-‘por amount of movement of' the upper member 35, tion. (not, shown). of the punch‘ block 4!. The the resulting relatively small‘ amount of- compres punch. block 4|. has a. punch->42 extending down sion of the springs does not permit sufficient wardly therefrom-which- performs the notching movement of the springs to present any large operations on the piece parts. 24. As thepunch opening between any two adjacent springs. block 41 is removable it is possible to change. the Thus, it maybe seen that thesafety‘ appliance type of punch utilizedv intheimachine, depending embodying the present invention may be con upon the type of notching operation to be per structed as a compact unit and be placed in close formed. 55 proximity to the working parts of the machineron A frame 45 having anvupwardly extending edge which it is installed. For this reason, it is possi 41 on all four sides thereof islremovably secured ble for a machine operator to-place his hands in to the circular upwardly extending portion I3 close proximity to the operating partsv to feed a of. the die shoe. 12 by means of the locating pins piece ‘part, or for any other reason, and yet be 29. Asmore clearly shownin Fig. 3, the-frame 46 protected from injury“ from the- reciprocating has a seriesof four specially formed openings punch by means of the safety device above each of which comprisesga large circular opening described. ' ' 48 which is slightly larger» in size than the head Althougha speci?c embodiment of the inven 32. of the locating. pin ‘2 9, and a-slotted portion 49, tion has been shown and described, it will be-un which is. slightly wider than the metal stock 33, ‘ , derstood that this embodiment is but illustrative extending from the circular opening 48 length wise of. the frame 46.. The circular opening 48 and the‘ slot 49 together assume the shape of a and that various modi?cations may‘ be‘made therein without departing from the, sco-peand spirit of this invention. keyhole. Thus, it is possible to removably secure What is claimed is: ' the frame 45 to the die shoe» l2’ by slipping the 70 1. In combination with a punch-press includ frame over the locating pins 29, the circular ing a reciprocating punch holder-rand a’ sta opening 48 passing over the head~32. The frame tionary die shoe, asafety device comprisinga is then- pulled forwardly, as viewed in Fig. 3, plate securely connectedv to said reciprocating which results in the metal stock 33» of the locat punch holder, a frame‘ having‘ openings therein ing pin29, which-is between the head.32 and the formed of a large circular section :and‘ a slot 2,404,675 5 V joining the circular section removably connected to said stationary die shoe through bolts in said die shoe engaging the openings in said frame, and a ‘plurality of springs each connected to said plate and to said frame, whereby upon reciprocation of said punch holder said springs will be com pressed and extended to afford protection to the ‘punch press operator under all conditions of oper ation. 6 3. In combination with a punch press including a reciprocating punch holder and a stationary die shoe, a safety device comprising a plate securely connected to said reciprocating ‘punch holder, a frame having a plurality of openings therein each formed of a circular opening and ah‘orizontally disposed slot connecting thereto, a plurality of pins securely fastened to said die shoe each formed with a circular head slightly smaller in 2. In combination with a punch press includ 10 size than the circular opening in said frameLa reduced body section directly below said head ing a reciprocating punch holder and a sta slightly smaller in size than the slot in said frame, tionary die shoe, a safety device comprising a and a wide shoulder immediately below the re plate securely connected to said reciprocating ‘punch holder, a frame having openings therein formed of a large circular section and a slot join ing the circular section, means to reinovably con nect said frame to said die shoe including bolts in duced body section, said pins and openings coop erating to allow said frame to be removably se cured to said die shoe, and a plurality of springs each connected to said plate and to said frame, whereby upon reciprocation of said punch holder said die shoe engaging the openings in said frame, said springs will be compressed or expanded to and a ‘plurality of springs each connected to said plate and to said frame, whereby upon recipro 20 a?'ord protection to the punch press operator under all conditions of operation. cation of said punch holder said springs will be ALAN E. VOSBUR'G. compressed or extended to afford protection to the punch press operator under all conditions of operation.