Riveting-machine.

Abstract

Claims

F. GLADER. RIVETING MACHINE. APPLIQATION FILED OCT. 13, 1913. v Patented Dec. 29, 1914. THE NORRIS PETERS CON PHOTO-LITHO, WASHINGTONv D. (5 4 SHEETS-SHEET l, F. GLADBR. Patented Dec. 29, 1914. 4 SHEETS-SHEET 2. NORRIS PETERS 60., FHOTO-LITHO.. WASHING fON D. L P. GLADER. RIVETING MACHINE. APPLIOATION FILED OCT. 13, 1913. Patented Dec. 29, 1914. 4 SHBETS-SHEBT3. THE NORRIS PETERS 60.. PHOTO LITHQI WASHINGTON. D. ' F. GLADBR. RIVBTING MACHINE. APPLIGATION FILED 0011s, 1913. 1,12 ,496, Patented Dec. 29, 1914. 4 SHEETSSHEBT 4. adv/36% MW m U m Mjzw/ Ii FTQE. FRANK GLADER, OF CHICAGO, ILLINOIS. RIVETING-MACHINE. Specification of Letters Patent. I Patented Dec, 29 1914 Application filed October 13, 1913. Serial No. 794,794. To all whom it may concern Be it known that I, FRANK GLADER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Riveting-Machines, of which the following is a specification. This invention relates in general to riveting machines and has more particular reference to machines adapted to rivet together the overlapping ends of barrel hoops and the like. One of the primary objects of this invention is the provision of mechanism for automatically positioning adjacent the riveting block a plurality of rivets and holding them so that the punched stock may be engaged therewith and then moved together with the rivets beneath the riveting hammer. Another object of the invention is the provision of novel meansfor automatically selecting a plurality of rivets from a supply and feeding these rivets to the positioning mechanism after each riveting operation. A further object is the provision of mech-- anism which will compress the stock at each side of the rivets so that the rivets will not be flattened or enlarged between the laps of the stock, thereby insuring a tight joint. Other objects and advantages of the present invention will be readily understood from the following description when considered in connection withthe accompanying drawings illustrating one form of means for carrying the invention into practical effect, it being understood that the invention is not circumscribed by the details of said means disclosed, the true scope thereof being defined by the claims. Referring to the drawings Figure 1 is a front elevation of a riveting machine embodying my invention; Fig. 2 is a central sectional view taken from front to rear of the machine shown in Fig. 1; Fig. 3 is a plan view of the rivet hopper, the upper portions of the conveying channels, and the rivet selecting and releasing mechanism, taken on line 33 of Fig. 2. Fig. 41 is an enlarged sectional view of the rivet positioning head and associated mechanism taken on the line l-l of Fig. 2; Fig. 5 is a fragmentary sectional view taken on the line 55 of Fig. 2; Fig. 6 is a partial sectional view showing the positioning head controlling means, and Fig. 7 is a sectional view taken on the lines 7 7 of Figs. 2 and 8. I Referring to the drawings, reference character 8 designates generally the main frame ofthe machine upon which the vadescribed rious mechanisms. hereinafter are carried. A shaft 9, provided at one end with a pulley 11 and at the oppo site end with a fly wheel 12, is mounted near the upper end of the frame'in bearings 13 and 14. This shaft is driven f with a corresponding clutch member .19 formed on the hub of the wheel 16 to connect the wheel with the shaft, the movement of the clutch member 18 being effected through the instrumentality of a controlling Shaft 9 is provided intermedilever 21. ate its ends with an eccentric portion to which a connecting rod 22 is journaled the lower end of the rod being connected with a head 23 which is guided in its reciprocatory movement between pairs ofsuitable guide plates 24 fixed on the mainframe. A riveting hammer 25 is rigidly attached to the head 23 in position to cooperatev with an anvil or riveting block 26 fixedly carried on the main frame of the machine. WV-hen a hoop is to be riveted the overlapping ends thereof with the rivets protruding through the punched holes in the ends are moved into position on the riveting block beneath thehammer so that when the hammer is depressed the rivets will be flattened down between the riveting block and the hammer to securely fasten the hoop ends together. The rivets are contained in a magazine 27 at the rear of the machine from which they are deposited in conveying channels 28 by pick-up mechanism, which will now be described. The channels 28 incline upwardly and rearwardly, as will be evident from inspection of Fig.2, and a pair of reciprocatory devices 29 are mounted to reciprocate vertically in the magazine 27 adjacent the open upper ends of the channels. The upper ends of the devices 29 are provided with channels 31 (Fig. 3) disposed parallel with the channels 28 and when the devices are in elevated position these channels are disposed in alinement with'the ends of the channels 28. As the devices 29 are reciprocated anumber lit) of rivets become engaged in the channels 31 and are elevated into alinement with the channels 28. The inclination of the channels 31 causes the rivets to be deposited in the channels 28 which are provided with slots 32 in their upper faces through which the shanks of the rivets project, the rivets being supported by their heads above the slots. The devices 29 are reciprocated from levers 33 pivoted on the shaft 17 and provided at their rear ends with followers 34 adapted to be engaged by cams 35 on a shaft 36 driven by suitable gearing from the shaft 17. The outer ends of the levers 33 are connected by links 37 with the reciprocatory devices 29. It will be evident that at each revolution of the shaft 36 the devices 29 will be raised and lowered alternately to deposit rivets in the upper ends of e channels 28. For the purpose of insuring that the rivets will be deposited in the channels in proper position I have provided a slide or scraper 38 which reciprocates longitudinally of the channels 28 to push any rivets which are not properly disposed in the slots 32 back into the magazine. The slide 38 is spaced above the channels a suiiicient distance to permit the heads of rivets properly positioned in the slots 32 to pass thereunder and slide downwardly along the channels 23. The slide is re'ciprocated from a link 39 connected at one end to a lever 41 fixed to a shaft 42 mounted in a bracket 43. A second lever 44, also fixed on the shaft 42, is connected. by means of a rod or link 45 with a lever 46 pivoted on the shaft 17, the rear end of said lever being equipped with a follower 47 positioned to be actuated by a cam 48 fixed on the shaft 36. The rear end of the lever 46 is preferably weighted, as indicated at 49, to insure engagement of the follower 47 with the cam 48 and return the slide 38 to lowered position after each upward movement along the channels 28. The present machine is designed to position two rivets for each operation, that is, each hoop joined is secured by two rivets, and I have therefore provided two channels 28 and the whole machine is constructed to handle two rivets. It will be manifest, however, that the machine might be designed to put but one rivet in each joint, or it might readily be designed to put three or more rivets in each joint, the present machine adapted to handle two rivets being shown merely for purposes of illustration. The rivets when properly positioned in the channels 28, as shown in Fig. 3, slide downwardly therein in orderly succession until their movement is arrested by a selecting and separating device which will now be described. Referring to Figs 3 and 7, it will be observed that l have interposed in the chan nels 28 a transversely reciprocable separator bar 51 provided with inclined grooves 52 over which is disposed a slotted plate This plate is provided with inclined grooves 54 which, when the bar is in the position shown in Figs. 3 and 7, are disposed with their upper ends in alinement with the slots 32. When the bar and the plate carried thereby, are in this position further down ward movement of the rivets along the slots 32 is arrested but upon movement of the bar toward the left the foremost rivets will be separated from the remainder and will be permitted to pass onwardly down the in clined channels. The remaining rivets are held back by the bar and upon the next movement of the bar two more rivets will be separated and permitted to pass down the channel. The bar 51 is moved toward the left, viewing Figs. 3 and 7 by a link 55 attached at one end to the bar and at its other end to the upper end of an arm 56 (Fig. 2) fixed on a rock shaft 57, upon which a laterally projecting arm 58 is secured carrying a follower 59 which is elevated to rock the shaft by means of a cam. 61 which, together with a gear 62, is fixed on a shaft 63. It will be manifest that each time a high portion of the cam 61 engages the follower 59 the shaft 57 will be rocked to move the bar 51 to the left through the instrumentality of the arm 56 and the link A contraction spring 64 (Figs. 3 and 7) connected at one end to a bolt 65 fixed on the machine frame and at its other end to a pin 66 projecting downwardly from the bar 51 tends to return the bar to normal position, an adjustable stop 67 being provided to limit the return movement of the bar. The rivets are delivered from the lower ends of the channels 28 to an intermittently rotatable positioning head 67 which at each half revolution carries a pair of rivets, received from the channels, to the position shown in Figs. 2 and 4, from which it will be observed that a pair of rivets is disposed at the top of the head in position to permit the punched ends of the hoop to be engaged therewith, whereupon .the hoop together with the rivets is moved into riveting position upon the riveting block 26 beneath the hammer 25. The positioning head is mount ed on a shaft 63 and is provided with a gear 69 mounted on said shaft in position to mesh with and be driven by a gear 71 fixed on a shaft 72 mounted in the frame of the ma chine. This shaft is driven from the gear 62 on the shaft 63 through the intermediary of a bevel gear 73 meshing with gear 62 and fixed on a shaft 74 mounted in a bearing 75 and squared at its inner end, as indicated at 76, for driving engagement with the end of the shaft 72. The shaft 63 is driven from the shaft 17 by means of a chain 77 t'ained over a sprocket wheel 78 fixed on the shaft 17 and a similar sprocket wheel 79 frictiontinuously driven from the shaft 17. Rota tion of the shaft 63 is prevented, however, by mechanism which intermittently stops the rotation of the positioning head 67 so that shaft 63 is permitted to rotate only when the positioning head is released. The positioning head 67 is flattened at diametrically opposite sides and equipped with holding plates 81 which are spaced from the periphery of the head a sufficient distance to accommodate the heads of rivets between the plate and the positioning head, these plates being constructed to extend rearwardly beyond the rear face of the head and being provided with rivet receiving .slots 82, as best shown in Fig. 6. When the positioning head is held against rotation by mechanism which will be later described the slots 82 of the plate at the bottom of the head are disposed in alinement with the conveying channels 28, so that when a pair of rivets which have been released by the selecting and separating mechanism, previously described, reach the lower ends of the channels 28 they are delivered into the slots 82 of the plate 81, as shown in Figs. 2 and 4. When the head is rotated in a clockwise direction, viewing Fig. 4, the rivets are carried around into the upper position to receive the hoop ends. In order to insure that the rivets will be properly positioned in the slots 82 a bracket 80 is adjustably mounted on the machine frame above the lower plate 81, (Fig. 2) which lies below the ends of the I channels, so that the rivets cannot rebound into the channels. The bracket 80 prevents the rivets from jumping out of the slots 82. To insure that the rivets are discharged from the channels into the slotted plates the extremities of channels 28 are laterally inclined as indicated at 83, with the result that when the plate begins to travel toward the left, viewing Fig. hupon initial rotation of the head, these inclined sides of the channels force the rivets inwardly in the slots 82 so that the proper position of the rivets in the slots is insured. To prevent the rivets from disengagement with the slots upon rotation of the positioning head I have mounted adjacent the head, a flanged track 85 which prevents the rivets from moving outwardly in the slots until the head has been stopped with the plate 81 in operative position. The positioning head is intermittently stopped in its rotary movement by a dog 86 fixed on the outer end of a shaft 87, the opposite end of the shaft being provided with the frame of the machine .a lever 88 (Fig. 2), to the lower end of which is secured one end of a contraction spring, 89, the other end being attached to v as shown in Fig. 6. This spring normally. holds the dog 86 in the position shown-in Fig. 4 so that it ens gages with abutments 91 formed on the inner perimeter of the positioning head and holds said head against rotation. The dog 86 is intermittently withdrawn from operative position to permit a partial rotation of the positioning head by mechanism which will now be described. The arm 88 at the inner end of shaft 87 also extends upwardly above the shaft into the path of movement of an arm 92 fixed on I a short shaft 93 which carries at its other end a horizontally extending arm 94-. This shaft is rocked at each riveting'operation to release the dog 86 and permit a semirevolution of the positioning head. Since a riveting operation is not performed at each depression of the continuously reciprocating head 23 it will be obvious that the positioning head should be actuated only when a riveting operation has been performed. I have therefore provided mechanism which both detects the position of a hoop when in operative relation to the riveting hammer and also compresses the overlapping hoop ends adjacent to the rivets so that a tight strong joint is secured. With this end in view I have provided the head 28 with a pair of downwardly and rearwardly extending lugs 95, between which a block or head 96 is pivot ally mounted on a pin 97. Three lap closing and detecting fingers 98 are carried by this block and project beneath the riveting head in proximity to the rear face of the riveting hammer 25. Strong expansion springs 99, disposed between the forward end of the block 96 and a fixed portion of the riveting head 23 normally urge the fingersinto the position shown in Fig. 2. As are carried downwardly in advance of the riveting hammer to engage with and compress the hoop ends on each side of the rivets, thereby closing the laps and holding them together so that the rivets will be prevented from upsetting between the laps. The strength of the springs 99 may be varied to suit different requirements, but for ordinary work I findit desirable to compress the laps by the fingersunder a pres sure of approximately 150pounds. When no hoop is present on the riveting block the fingers enter recesses 90 formed in the block 26 for that purpose. The fingers are guided in their up and down movements by guides 70, as shown in Fig. 5. When a hoop, disposed on the riveting block in position to be riveted, is encountered by the fingers on their downward movement the resistance offered by the hoop will at a certain point overcome the force of the springs 99 so that the block 96 will be rocked on its pivot. This movement of the block is utilized to control the movements of the positioning head in the fell wing manner: The block 96 is equipped with a rearwardly extending tail 101, which is provided with an adjustable bolt or finger 102 disposed over a socket or flattened portion 103 of the arm 9%. W'hen the block is rocked the extremity of this tail will be lowered, thereby depressing lever 9 1, rocking the shaft 93, which through the arm 92 fixed thereon and the arm 88 fixed on shaft 87, withdraws the dog 86 from operative relation to an abutment 91 and permits the positioning head to make half a revolution before the other abutment vill be brought into engagement with the dog 86. it will be obvious that the dog 86 immediately returns to operative position under the-influence of the spring 89, for the reason that themovement of the riveting head is comparatively rapid and the tail 101 will be withdrawn from operative relation to the arm 9% immediately after the riveting head begins its Lip-stroke. It will be obvious therefore, that the riveting head reciprocatcs idly until a hoop is positioned therebeneath, whereupon the mecl'ianism described first closes the laps of the hoop and then releases the positioning head which makes half a revolution to position another pair of rivets adjacent the riveting block and at the same time the selecting and separating mechanism releases another pair of rivets which are thereupon delivered. by the conveying channels 28 to the positioning head. To facilitate the formation of a tight joint, particularly in the manufacture of beaded hoops, l have formed the face of the riveting hammer so that it will smash the hoop bead against the riveting block on each side of the rivets. The riveting hammer 25 is formed, as shown in Fig. l, to provide riveting portions 103 spacer. apar to cor-- respond with. the spacing of the rivets and adapted to engage the upper ends of the rivets and flatten them out against the up per face of the upper hoop end. Between the riveting faces 1% the hammer is provided with an extending portion 10%;, and similar extending por us 105 are formed at each side of the riveting portions 103. vill be manifest that v en the riveting hammer forced downward the v'enchng portions 10:: and 10:5 will smash the hoop beads and in conjunction with the lap closing lingers will hold the laps close. Y together so that when the riveting operation is performed by the portions 103, the metal of the rivets will be flattened out above the hoop ends, and upsetting of the rivets between the hoop ends will be precluded. It is believed that one embodiment of my invention and its mode of operation will be suiiiciently understood from the foregoing without further description, and it Will be obvious that the details of construction of the machine may be widely varied from those shown for purposes of illustration without departing from the essence of the invention or sacrificing any of its material advantages. 1 claim: 1. In a riveting machine, the combination of a rivet positioning device, means for conveying rivets to said device, means for detecting the presence in riveting position of a hoop to be riveted, and mechanism 01erated by said detecting means for controlling the delivery of rivets to said positioning device. 2. In a riveting machine, the combination of a rivet positioning device, means for conveying rivets to said device, and means controlled by the presence or absence ofa hoop to be riveted for controlling the operation of said positioning device. 3. In a riveting machine, the combination of rivet positioning mechanism, and means, rendered operative by the presence in riveting position of ahoop to be riveted, for controlling the operation of said positioning mechanism and controlling the delivery of rivets thereto. l. In a riveting machine, the combination of rivet positioning mechanism, and means for feeding a predetermined number of rivets to said positioning mechanism at each operative stroke of the machine, said means being inoperative upon idle strokes of the machine. 5. In a riveting machine, the combination of an anvil, a riveting hammer adapted to cooperate therewith, a rivet positioning mechanism and mechanism for feeding rivets to said positioning mechanism, the positioning mechanism comprising a rotatable head provided with rivet holding means, andmeans rendered operative upon the riveting stroke of said hammer for intermittently actuating said head whereby rivets carried from said delivery mechanism into operative position adjacent to said anvil. i. In a riveting machine, the combination of an anvil, a reciprccatory hammer adapted to cooperate therewith, rivet feeding mechanism, rivet positioning mechanism comp "ising a rotatable head having rivet holding slots, and means controlled from said hammer for POSltlOlllllg said holding slots successively in registration with the feeding mechanism and in operative relation to the anvil. 7. In a riveting machine, the combination of rivet positioning head having open ended rivet holding slots parallel with the axis of rotation of said head, and means for automatically and intermittently stopping said head with the slots in position to receive rivets into said slots and to discharge rivets from said slots. 8. In a riveting machine, the combination of a rotatable positioning head, means for rotating said head, means for stopping the rotation thereof at every half revolution, means for delivering rivets to the bottom of the head, means for preventing disengagement of the rivets from said head while the head'is making a semi-revolution and means for rendering said rotating means operative after each riveting operation. 1 9. In a riveting machine, the combination of a rivet positioning head, rivet holding means carried by said head, means for rotating the head, means for automatically stopping the head at each half revolution, means including rivet supplying channels terminating adjacent the lower edge of said head for supplying rivets to the positioning head each time the head stops and means for preventing rotation of said head upon idle strokes of the machine. 10. In a riveting machine, the combination of a rivet positioning head, rivet holding plates carried thereby, rivet supplying chan' nels terminating adjacent the lower edge of said head, the ends of saidchannels being tapered to insure engagement of rivets with the holding plates upon initial movement of the head, and a guide adjacent the head for preventing disengagement of the rivets from said holding plates during rotation of the head. 11. In a riveting machine, the combination of a rivet positioning head, means for supplying rivets thereto, means for rotating said head, and mechanism operated by a hoop when in position to be riveted for controlling the rotation of said head. 12. In a riveting machine, the combination of a riveting hammer, a rivet positioning head, means tending to continuously rotate said head, a dog normally holding said head against rotation, a tripping device carried by said riveting hammer in position to be operated by the stock to be riveted, and connections between said device and said dog whereby the dog is released upon engagement of the tripping device with the stock to be riveted upon operative movement of said hammer. 13. In a rivetingmachine,the combination of a reciprocatory riveting hammer, a tripping device comprising a plurality of fingers pivotally carried by said hammer, a rotatable rivet positioning head, a dog normally holding said head against rotation, and connections between said dog and said tripping device for releasing the dog when said fingers engage with the stock to be riveted upon riveting movement of the hammer. 1 1. In a riveting machine, the combination of a reciprocatory riveting hammer, a tripper device pivotally mounted thereon, fingers carried by said tripper device, springs for yieldingly projecting said fingers beyond the plane of said hammer face, a rivet positioning device, and mechanism operated by said tripper upon engagement of said fingers with the stock to be riveted for actuating said positioning device. 15. In a riveting machine, the combination of a reciprocatory riveting hammer, a block ivotally mounted thereon, fingers carried by said block, springs for normally projecting said fingers beneath the face of said hammer, a tail projecting from said block, an oscillatory shaft, an arm fixed on said shaft and projecting into the path of said tail, a second arm fixed on said shaft, a pivotal dog disposed in the path of said second arm, rivet positioning mechanism normally held against rotating movement by said dog, and means tending to normally rotate said mechanism, the dog being released upon engagement of said fingers with the stock to be riveted. 16. In a riveting machine, the combination of a reciprocatory riveting hammer, an anvil, a lap closer comprising a plurality of fingers pivotally mounted on said hammer, and means for yieldingly holding said fingers beneath the face of said hammer. 17. In a riveting machine, the combination of a reciprocatory riveting hammer, an anvil, a plurality of lap closing fingers pivotally carried by said hammer, and means for yieldingly projecting said fingers beneath the face of said hammer, the anvil being provided with recesses to receive said fingers. 18. In a riveting machine, the combination of a reciprocating riveting hammer, an anvil, a plurality of-pivotally mounted fingers yieldingly protruding in advance of the riveting face of the hammer, and means controlled by pivotal movement of said fingers for positioning a plurality of rivets adjacent to said block. 19. In a riveting machine, the combination of a rotatably mounted positioning head provided with a slotted rivet holding plate, 1 Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latencs, Washington, D. 0.

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