US2322381A - Rivet sticker - Google Patents

Description

June 22, 1943. o. MUELLER RIVET STICKER Filed June 22, 1939 4 Sheets-'Shet 1 IN VENTOR 02 3 0 MaeZ/en M NE Y5.

June 22, 1943. o. MUELLER RIVET STICKER Filed June 22, 1959 4 Shets-Sheet 2 Q 11v VENTOR BY 052 0 Mae/Z1 O. MUELLER RIVET STICKER June 22, 1943.

Filed June 22, 1939 4 Shets-Sheet 3 INVENTOR BY 02 /0 Mei/er:

: 1 romva a June 22, 1943. o. MUELLER RIVET STICKER '-4 Sheets-Sheet 4 Filed June 22, 1939 fa 66 /8 IN VENTOR 0 2 50 Mueller:

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Patented June 2.2, 1943 UNITED STATES PATENT OFFICE Murray Corporation of America,

Detroit, Mich,

a corporation of Delaware Application June 22, 1939, Serial No. 280,670

3 Claims.

My invention relates to rivet devices, and particularly to a device for sorting and delivering a rivet to a position to be stuck and swaged.

The present invention embodies a rivet sorter, the head of which is rotated to have the rivets selectively suspended by their heads in a delivery trough. The sorting head is rotated by a. cylinder actuated in reciprocation to drive a rack and pinion, the latter of which, operating through over-running clutches, alternately drives a pair of gears. One gear drives the shaft supporting the rotor directly, while the other drives the shaft through an idler gear, and the sorting head is thereby intermittently advanced in a counterclockwise direction. Beneath the trough in which the rivets are suspended by their heads, an advanceable arm is mounted in a sleeve and a slot and roller connection is provided therebetween, such as to cause the arm to turn through 180 degrees during its advancement to rivet sticking position. The arm is provided with a cam surface which operates during its advancement, and a selector which disengages a rivet from the group suspended in the collecting trough to permit a single rivet to advance to the end of the trough each time the arm is advanced. A rivet holding head is mounted above the arm at the end of the trough, in position to receive the single rivet released 'by the selector. The head is also aligned with a pair of spring pressed pivoted fingers on the end of the arm having a hole in which the rivet is placed by the head when actuated downwardly by a piston within the cylinder. The fingers function as jaws to be opened by the rivet when forced in the aperture thereof and to support the rivet when released by the holding head. The entire mechanism is actuated by a 'fluid introduced into one or the other end of the cylinders to relatively move the piston and cylinder longitudinally.

Accordingly, the main objects of my invention are; to provide a rivet selecting and placingdevice which is operated by a plurality of fluid actuated pistons and cylinders; to provide a rotor for selecting the rivets and assembling them in a trough which is actuated 'by a cylinder for unidirectionally advancing the rotor; toprovide an arm for advancing the rivet to sticking posi tion which operates a selector for releasing a single rivet from the trough; to. provide a rivet holding head at the. end ofthe trough for receiving and holding the rivet and advancing the rivet into the jaws on the rivet sticking arm; .andin. general, to provide means for selecting therivets, placing a single rivet at a time in jaws, and advancing and rotating the jaws through 180 degrees to a position adjacent the elements to be riveted, all 'of which is simple in construction, positive in operation, and economical of manufacture.

Other objects and features of novelty of my invention will be either specifically pointed out or will become apparent when referring, for a better understanding of my invention, to the following description taken in conjunction with the accompanying drawings, wherein:

Figure l is a side view, in elevation, of a rivet selector and sticking device embodying features of my invention;

Fig. 2 is an enlarged sectional view of the structure illustrated in Fig. 1, taken on the line 2-2 thereof;

Fig. 3 is an enlarged sectional view of structure illustrated in Fig. 1, taken on the line 3--3 thereof;

Fig. 4 is an enlarged broken view in section of the device illustrated in Fig. 1, showing the rivet advancing arm in retracted position;

Fig. 5 is a sectional view of the structure illustrated in Fig. 6, taken on the line 5-5 thereof;

Fig. 6 is a sectional view of the structure illustrated in Fig. 3, taken on the line 6-5 thereof;

Fig. '7 is a sectional view of the structure illustrated in Fig. 6, taken on the line ll thereof;

Fig. 8 is a sectional view of the structure illustrated in Fig. 6, taken on the line 88 thereof;

Fig. 9 is a sectional view of the structure illustrated in Fig. 6, taken on the line 9--9 thereof;

Fig. 10 is an enlarged view of structure, similar to that illustrated in Figs. 1 and l, after the rivet has been advanced by the rivet sticking arm;

Fig. 11 is a sectional view of the structure illustrated in Fig. 10, taken on the line ll--l| thereof;

Fig. 12 is a sectional view of the structure illustrated in Fig. 10, taken on the line l2-i?. thereof; and,

Fig. 13 is a sectional view of the structure illustrated in Fig. 12, taken on the line 'l3-l3 thereof.

In Fig. 1, I have illustrated the rivet sticking device as embodying a rivet selector it, a receiving head it, and a trough in which the rivets are headsa's illustrated more clearly in Fig. 6. When the trough is full, the rivets pass over the end and as they are delivered from the opposite end, additional rivets will be guided by the end by the leaf spring into the slot 26 of the trough. The rotor 23 is mounted on a shaft 27 and is journaled in a bearing 28 in the casting 29. The bearing 28 is secured in the split hub 3| of the casting by pins 32, and the bolt 34. A splined sleeve is mounted on the shaft 27 and is keyed to the hub of the rotor 23 by key 36. The sleeve is splined and carries a gear unit 3'! thereon having gear teeth 38 and 39 on the outer periphery by which the sleeve 35 and therefore the hub of the rotor 23 is driven first through one set of gear teeth and then through the other. Keys 4! lock the gear unit 37 to the sleeve 35 in the splines provided therein.

The driving mechanism embodies a fixed shaft 42 having mounted thereon a piston over which a cylinder 43 operates in reciprocation. Fluid is introduced into the cylinder through the hollow shaft 42 illustrated in Fig. 6 to one or the other side of the piston to cause the cylinder to reciprocate on the shaft. A pin 44 projects from the top of the cylinder and operates in a slot 45 in a housing 46 surrounding the mechanism, to prevent the cylinder from turning on the shaft. The cylinder has a rack 4'! secured to the underside which operates a gear 48 in rotation. A shaft 43 carries a pair of gears 5i and 52 for independent rotation thereon. The gears 5| and 52 are provided with shoulders 53 on which the gear 48 rotates and on a friction washer 54 mounted between the shoulders. Over-running clutches 55 and 56 interconnect the gear 46 alternately to the gears 5i and 52 as the cylinder reciprocates.

It will be noted from Figs. 8 and 9 that the clutches are mounted to become effective in different directions of operation so that when the cylinder 43 is advanced to the right as illustrated in Fig. 7 the gear 48 moves in a clockwise direction and drives the gear 5! along therewith while releasing the gear 52. Upon the reversal of the flow of fiuid within the cylinder thereafter, the cylinder will be advanced to the left releasing the gear 5| and engaging and driving the gear 52. In this manner through the movement of the cylinder in one or the other directions, the gears 5| and 52 will be rotated alternately in a clockwise or counterclockwise direction.

The gear 52 has the teeth thereof meshing with the teeth 36 of the gear unit 37 so that as the gear 52 is driven the rotor 23 will be driven in a counterclockwise direction.

of which are in mesh with the teeth 39 of the gear unit 37. Upon the reverse movement of the cylinder 43, that is to the left, as viewed in Fig. '7, the gear 55 is driven in counterclockwise direction while gears 51 and 58 are driven in clockwise direction which drives the gear unit 31 in a counterclockwise direction. This continues the movement of the rotor in a counterclockwise direction previously produced by the operation of the gear 52 as the cylinder 43 moves to the right.

It will be apparent, therefore, that continued reciprocation of the cylinder as intermittently advances the rotor 23 in counterclockwise direction to have the rivets retained by the slot 22, advanced to the end of the trough 24 where they will drop into the slot 26 of the trough, over the end thereof if the trough is filled with rivets. The mechanism just described for operating the The gear 5i meshes with a gear 5'! which drives a gear 58 the teeth rotor is that illustrated and described and claimed in my United States Patent No. 2,108,991, issued February 22, 1938, and will not be described further herein.

The rivets delivered to the trough 24 pass along the slot 26 thereof until the advancement is interrupted by the finger 6| on the end of the selector l9. The selector l9 comprises a pair of arms 62 and 63 projecting from a hub 64 which is secured on a pivot 65 for arcuate movement. The arm 63 carries the fingers 6| while the arm 62 is provided with a stop finger 66. A cam arm 6'! is mounted on the hub 64 projecting through an aperture 68 of a sleeve 69. The sleeve 69 is supported in a pair of brackets H on a base 12 and is provided with a helical slot 73 in its wall-for a purpose which will be explained hereinafter.

A piston rod 14 has a pair of fluid passageways T5 and 16 therethrough as illustrated in Fig. 12. The piston rod carries a piston 11 thereon disposed within a cylinder 18 provided on the rear end of the rivet advancing plunger 79. A suitable packing gland 8| is provided on the end of the cylinder to form a seal with the piston rod 74. A pair of tubular connectors 82 on the piston rod provide means for connecting fluid circuits to the rod whereby fluid is introduced into one or the other of the passageways I5 and 16 thereof as illustrated in Fig. 12.

' The end of the piston rod is threaded at 83 and is adjustably secured by nuts 84 to a web 85 on the base 12. The end of the plunger 19 is enlarged to provide a bearing fit with the inner surface of the sleeve 69. A cam surface 86 is formed between the enlarged end of the plunger 19 and wall of the cylinder 18 which operates the cam arm 61 on the rivet selector l9 to have the fingers 6| and 66 move once across the slot 26 of the trough 24 to permit a single rivet to drop between the fingers 6| and 66 each time the arm is actuated. In this manner a single rivet is delivered to the holding head l6 at each operation of the device.

A head 81 is mounted on the end of the plunger 19 and is provided with a slot 88 in which a pair of clamping jaws 89 are mounted on a pivot 9|. A spring-pressed plunger 92 engages the rear wall of the jaws to bias them together about a rivet. The ends of the jaws are provided with aligned semi-cylindrical notches which form an aperture 93 when the jaws are disposed in abutting relation. The aperture thus formed has a chamfered end 94 which aids in guiding the rivets into the opening 93 and serves as a cam'for opening the jaws when the rivet is forced therethrough. The plunger I9 has a roller 95 on its wall secured by a pin 96. The roller is disposed in the slot 13 and produces the rotation of the plunger 19, head 88, and jaws 89, as well as the cylinder l8 when the cylinder is reciprocated over the piston 11 through the admission of fluid either side of the piston. Through the adjustment of the nuts 84, the advancement of the jaws 89 relative to a workpiece is Very accurate ly regulated.

The rivet holding head l6 embodies a supporting bracket 98 extending from the forward bracket H on the base 12. A cylinder 99 is supported by the bracket 98 having a plunger l0! projecting from the lower end thereof and actuated by a piston within the cylinder. The lower end of the bracket 98 is provided with a hub I02 through which the plunger IOI extends. Within the hub a rivet receiving and supporting cylin der I03 is provided having shoulders I04 thereon which limit the downward movement of the cylinder when engaging an end cap I on the end of the hub I02. The cylinder I03 is biased downwardly by a spring I06 mounted within the hub. A pair of fingers I01 are mounted in slots in the cylinder I 03 having projecting end p rtions I08 which engage the underside of the rivet head which has been advanced through a slot I09 in the wall of the cylinder. A garter spring III is secured on the outer wall of the fingers I01 for biasing them inwardly toward the cylinder axis.

A cam surface H2 is provided on each finger which is engaged by an enlarged end II3 of the plunger IOI for moving the fingers outwardly and forces the rivet, which is thereby released through the aperture 93 of the jaws 89, as illustrated in Fig. 11. The enlarged end Il3 operates in the enlarged aperture H4 in the lower portion of the cylinder I03, providing a shoulder II5 against which the end II3 abuts to raise the cylinder against tension of the spring I06 during the upward movement of the plunger IOI within the cylinder 99, The cylinder I03 is provided with a key I H which operates in a slot in the end cap I05 to prevent the cylinder I03 from turning relative t the hub I02. A bearing H8 is provided in the upper end of the hub for guiding the plunger when moved into or from the cylinder 99.

The operation of the device will now be described. Fluid is first introduced through the piston rod 14 to advance plunger I9 and, therefore, the jaws 89 into position to have the rivet held thereby revolve through 180 degrees and disposed aligned with the aperture of the workpiece to be riveted, as illustrated in Fig. 1. After the rivet has been moved from the jaws 89 through the advancement of a riveting plunger, the plunger I9 and the jaws are returned to their original position. This movement of the cam surface 86 in reciprocation, operates the cam arm 61 and the selector I9 to permit a single rivet to be delivered along the trough 24, The rivet advances in the trough and is projected from its end trough through the slot I09 of the cylinder I03 where it is held by the projections I08 on the pivoted fingers I01.

After the return of the plunger I9 to its initial position, the piston of the cylinder 99 is moved downwardly to move the plunger I0| therewith.

The downward movement of the plunger carries the cylinder I03 along therewith until the shoulders I04 thereof rests upon the cap I05. Thereupon the downward movement of the cylinder I03 ceases, while the plunger continues to ad- Vance. This further advancement of the plunger moves the fingers I01 outwardly against the bias of the garter spring III and releases the rivet which is free to drop upon the jaws 89. The rivet is engaged by the end II3 of the plunger IM and forced through the aperture 93 of the jaws 89 Where it is retained through the bias of the plunger 92 on the jaws, as illustrated in Fig. 2.

, ing the rivet holding jaws, advances a rivet into Thereupon the flow of fluid in the cylinder 99 is reversed to have the piston and, therefore, plunger I9I moved upwardly. The upward movement of the plunger IOI produces the return of the cylinder I03 to its original position through the engagement of the end II3 of the plunger therewith. Thereupon a new rivet is delivered to the jaws, ready to be advanced adjacent to a new workpiece. It will be understood that, during the operation of the elements of the device, the rotor 23 continues to be driven sticking position while turning the jaws and rivets through degrees, The operation of the plunger within the cylinder of the rivet holding head, releases the rivet from the holdin fingers and forces the rivet into the aperture of the jaws. The sequence of operation of the elements is effected by valves in a well-known manner and not herein illustrated or described.

While I have described and illustrated but a single embodiment of my invention, it will be apparent to those skilled in the art that various changes, omissions, additions and substitutions may be made therein without departing from the spirit and scope of my invention, as set forth in the accompanying claims.

What I claim is:

1. In a rivet sticking device, a rivet supporting head, means for delivering rivets seriatim to said head, a sleeve below said head, a plunger in said sleeve, a cylinder for advancing said plunger from said sleeve, means interconnecting the sleeve and plunger to cause the same to rotate through 180 degrees when moved relative to each other, a pair of spring-pressed jaws on the ends of said plunger aligned with said head, means in said head for advancing a rivet to said jaws and for thereafter releasing said rivet from said head and forcing the rivet between said jaws, and means for thereafter returning said supporting head to its initial position.

2. In a rivet sticking device, a rivet supporting head, means for delivering rivets seriatim. to said head, a sleeve below said head, a plunger in said sleeve, a cylinder for advancing said plunger from said sleeve, means interconnecting the sleeve and plunger to cause the same to rotate through 180 degrees when moved relative to each other, a pair of spring pressed jaws on the ends of said plunger aligned with said head, means in said head for advancing a rivet to said jaws and for thereafter releasing said rivet from said head and forcing the rivet between said jaws, means for thereafter returning said supporting head to its initial position, and means thereafter for advancing said jaws to rivet sticking position.

3. In a rivet sticking device, a rivet supporting head, means for delivering rivets seriatim to said head, a sleeve below said head, a plunger in said sleeve, a cylinder for advancing said plunger from said sleeve, means interconnecting the sleeve and plunger to cause the same to rotate through 180 degrees when moved relative to each other, a pair of spring-pressed jaws on the ends of said plunger aligned with said head, means in said head for advancing a rivet to said jaws and for thereafter releasing said rivet from said head and forcing the rivet between said jaws, means thereafter for returning said supporting head to its initial position, and means thereafter for advancing said jaws to rivet sticking position, the reciprocation of said plunger producing the seriatim delivery of the rivets to said head.

OTTO MUELLER.

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