US1421310A - renaud - Google Patents

Description

A. F. RENAUD. RlVET FEEDING MECHANISM. APPLICATION FILED MAY 3, I920.

1,42 1,3 1 O. Patenwd June 27, 1922.

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RIVET FEEDING MECHANISM.

APPLICATION FILED MAY 3. 1920.

1,421,310. Patented June 27,1922.

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I RlVET FEEDlNG MECHANiSM.

APPLICATION FILED MAY 3, 1920.-

1,421,3 10. 4 Patented June 27, 1922.,

3 SHEETS-SHEET 3.

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UNITED STATES ARISTIDE FREDERICK RENAUD, OF NEW ORLEANS, LOUISIANA, ASSIGNOR TO THE RENAUD COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

RIVET-FEEDING MECHANISM.

Specification of Letters Patent.

Patented June 27, 1922.

Application filed May 3, 1920. Serial No. 378,561.

T 0 all whom it may concern:

Be it known that I, Ams'rmn FREDERICK RENA'UD, a citizen of the United States, and a resident of New Orleans, inthe parish of Orleans and State of Louisiana, have invented a new and Improved Rivet-Feeding h'lechanism, of which the following is a full, clear, and exact description.

This invention relates generally to punch presses and has specific relation to an in1- proved rivet feeding mechanism designed for use in connection therewith.

In bailing cotton and other materials of this character, considerable waste has been occasioned by discarding the old bands employed to secure the bails together and it has been found that a great saving can be effected by salvaging these bands and splicing them together for further use. To this end therefore mechanical means has been provided for splicing the second hand bands or ordinarily discarded strips thereof, to produce what is commercially known as a double riveted no spider tie,, to meet with the requirements of certain existing State laws.

Broadly, the invention contemplates a rivet feeding mechanism adapted to be associated with a punch press and operable thereby for automatically feeding and presenting the rivets in a convenient position adjacent to the bolster plate of the press, to receive the openings in the strips which have been previously punched therein by the same.

An important object in view, is to provide a rivet feeding mechanism which is readily adjustable for feeding the rivets either singly or in pairs in a position where two previously punched band ends can be brought together in overlapping relation, with the openings engaged over the rivet shanks, the said band ends affording means for stripping the rivets from the feeding mechanism and positioning them under the riveting head of the press.

Another object and advantage of themvention resides in the provision of a rivet feeding mechanism, including a magazine having a slotted positioning head into which the rivets are fed by gravity, a predetermined number thereof being constantly retained therein until used, the construction of said head constituting means for ejecting surplus rivets back into the magazine for further use.

A still further object embodied by the mechanism is the automatically functioning means for sifting the supply of rivets to free the same of blanks, imperfect rivets or any foreign matter which might tend to hinder or obstruct proper operation.

A still further object is to provide a comparatively simple and highly eflicient mechanism for performing the above recited and other functions, which employs a minimum number of working elements, capable of being readily and quickly assembled or disassembled for repairs or replacement.

lVith the above and other objects in view, some of which will be apparent from the following description and. claims, reference is had to the accompanying drawings forming a part of this application and in which Figure 1 is a side elevation of a punch press illustrating the improved rivet feeding mechanism associated therewith, parts thereof being broken away to disclose the underlying structure.

Figure 2 is a front elevation thereof.

Figure 3 is a rear elevation of the same.

Figure 4 is an enlarged detail end view of the driving connection between the parts and the rivet feeding mechanism.

Figure 5 is an enlarged fragmentary side view of the same.

Figure 6 is an enlarged longitudinal sectional view through the magazine and its component parts, illustrating its application to the table of the press.

Figure 7 is a front view of the agitator disc removed from its drive shaft.

Figure 8 is a'vertical sectional view taken approximately on the line 88 of Figure 6.

Figure 9 is an enlarged fragmentary plan view of the rivet magazine and positioning head, illustrating the method of applying the band ends over the rivets.

Fig. 10 is an enlarged fragmentary end view of the open end of the magazine.

Referring to the drawings by characters of reference which denote like parts throughout the several views thereof, 10 designates a punch press of substantially standard construction, provided with the usual table .11 underlying its head and which receives the bolster plate 12. The upper portion of the press includes the bearings 13 in which the drive shaft 14 is mounted. The combination fly wheel and pulley 15 which is loosely carried by the rear eX-tremity of the shaft 14: is adapted. to be intermittently clutched thereto by a foot lever or pedal in the ordinary manner in which punch presses of this character are now operated. The clutch and foot lever or pedal form no part of the in vention and therefore no showing has been made. In order to adapt the punch press for the association of the particular rivet feeding mechanism constituting the invention its central web or column is preferably enlarged at the medial portion and said enlargement is provided with an opening or bore 16 extending from the front to the rear thereof. Any suitable lining or bushing 17 is arranged in the bore as illustrated.

The rivet feeding mechanism includes a hollow shaft 18 arranged in the bushing 17 and the same has a sprocket 19' keyed. to the extremity thereof which projects from the rear of the press. A second sprocket 20 iskeyed to the hub of the pulley 15 and said sprockets are operatively connected by sprocket chain 21 in order to. transmit rotations of the drive shaft let to the hollow shaft 18. A second shaft 22 is provided and is mounted in the bore of the hollow shaft 18 with the opposite ends thereof respectively projecting-mom the opposite ends of the hollow shaft. The end of said shaft which extends beyond the hollow shaft at the rear of the press has keyed thereon a ratchet wheel 23. A paw-l arm 24: is loosely mounted on the extreme end of the shaft 22 and a spring pressed pawl 25 carried by the arm is designed to coact with the teeth of the ratchet wheel for turning the shaft upon rocking of the arm in one direction. To provide means for rocking the arm upon revolutions of. the drive shaft 14. an eccentric pin 26 is carried by the extremity of said drive shaft and a connecting rod 27 has respectively journaled. in its opposite ends the eccentric pin 26 and the pivot pin of the pawl. The eccentric pin 26 is preferably radially adjustable on the drive shaft and the means of connection comprises a rectangular guide 28 having a T-shaped-slot 29 for the reception of the head 30 of the eccentric pin 26. the shank thereof passing through a suitable thiinble 31. A winged nut 32 is threadedly received on the outer end of the shank for clamping and retain ing the pin in its adjusted positions. By this arrangement the eccentric pin may be shifted toward and away from the axial center of the shaft to effect a greater or lesser rocking movement of. the pawlarm upon each revolution of. the drive shaft so that the pawl will move: the ratchet Wheel one or more teeth as. desired. A magazine 33 of substantially hollow conical formation, is keyed to the opposite extremity of .the

shaft 22 with the enlarged open end thereof facing the table. The enlarged open end is turned inwardly at an angle to the annular conical wall of the magazine and is graduallyreduced in thickness at its eX- treme outer end to provide an inner straight peripheral wall which in length is: substantially equal to the diameter of a single rivet.

to efiiect the proper positioning of the samev therein. A substantially frustro conical. member 37 having an annular flange 38 is secured to the outer end of the table 11 by means of screws or bolts 39. The flange 38 is of the same diameter as the enlarged open end of the magazine and closes the open ends of all of the slots 34: except the two which are disposed uppermost, said flange being cut away at this point as illustrated at 40. The frustro conical wall ll which projects outwardly from the flange 38 lies within the rivet receiving and positioning head 35 of the magazine and the same is provided at its outer end with an enlarged annular boss Or lip 42, the purpose of which will. be hereafter set forth. In order to provide means for effecting the radial projection of the shanks of the outermost. rivets from their slots, upon their arrival adjacent the bolster plate 13 the outer periphery or surface 4-3 of the member 37 adjacent its juncture with the flange 38 is eccentric to the inner periphery of the rivet receiving head 35 of the magazine 33, whereby to dispose said peripheries closer together at the uppermost point thereof and adja' cent. to the bolster plate.

An agitator disc 4% is keyed to the ex tremity' of the hollow shaft 18 which pro jects into the open end of the magazine said disc being disposed in front of the restricted end of the frusto conical. member to close the opening therein for preventing the entry of the rivets into the same. The agitator disc is providedwith radial angularly disposed grooves 45 on its outer surface which serve to agitate and loosen the rivets and prevent jamming. The magazine is provided with a filling opening $6 at its upper end through which the rivets are supplied thereto and said opening is closed by a movable cover plate 47.

In use and operation. the rivets 48 are initially suppliedto the magazine 33 and sufficient revolutions of the same are made to fill the slots 34 with rivets, said rivets gravitating into the lowermost slots as clearly illustrated in Figures 6 and 8 of the drawings. By reference to Figure 6, it will be seen that approximately four rivets pass the lip 42, the outermost rivet gravitating to substantially a vertical position, the remaining three being disposed at an angle. When all of the slots have been initially filled, the punch press is operated to cut off and punch two openings in the extremities of two band sections, the drive shaft 14 of the press making one revolution to complete this operation. A single revolution of the shaft 14 effects a rocking of the pawl arm 24 through the medium of the eccentric pin 26 and the connecting rod 27. The engagement of the pawl with the teeth of the ratchet thereby turns the magazine a distance equal to that between two successive slots and'it is therefore apparent that each rotation of the drive shaft 14 effects the turning of the magazine a suflicient dis tance to present a new rivet adjacent the bolster plate. he cut and punched extremities of the band sections 49 are then arranged in overlapped relation and engaged over the two outermost and uppermost rivets, said bands then being used as a means to strip said rivets from their slots and to position them under the riveting head of the press. Simultaneously with each revolution of the drive shaft 14 the agitator disc 44 makes a complete revolution through the me dium of the sprocket and chain drive which operatively associates the hollow shaft 18 with the drive shaft 14. The next operation of the press to upset the shanks of the rivets now positioned thereunder effects a movement of the magazine head the distance of another slot to bring a new rivet in place and the following operation of the press to cut and punch another pair of band sections effects a further movement of the magazine the distance of another slot to bring another rivet in position. Further operations of the press serve to continuously feed the rivets in position and as the magazine head moves around, new rivets are constantly fed to the lowermost slots by gravity to replace the rivets which have been withdrawn there from and used. The enlarged portion of the cam surface 43 arranged adjacent the bolster plate, functions to effect the radial projection of the shanks of the rivets 48 from their slots upon their arrival at the top thereof, and said surface provides a support against which the two uppermost and outermost rivets seat. The annular boss or lip 42 functions to retain the remaining rivets dis posed therebetwen and the outermost rivet against gravitation back into the magazine. The remaining rivets disposed between the extreme inner end of the slots and the boss drop back into the magazine upon their arrival adjacent the top. By this arrangemetn unused rivets for a particular cycle of movement are returned to the magazine where they remain until used.

While there has been illustrated and set forth a single and preferred embodiment of the invention, no limitation is necessarily made to the precise details of construction, and it is understood that variations and modifications which fall within the scope of the appended claims may be resorted to when found expedient.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent, is

l. A rivet feeding mechanism, comprising a rivet magazine adapted to contain a supply of rivets, a distributing head on said magazine, means for effecting radial projection of the rivet shanks from said head at a predetermined point, means for confining the removal of the rivets to such point, and means arranged Within the magazine for agitating the rivets.

2. In a rivet feeding mechanism the combination with a machine having a shaft adapted to be periodically driven one revolution, of a rotary magazine adapted to contain a supply of rivets and provided with radial slots therethrough, means operable by said shaft for intermittently rotating said magazine a predetermined distance upon each operation thereof, and a stationary means disposed within the magazine for effecting radial projection of the rivet shanks from the slots at a predetermined point.

3. In a rivet feeding mechanism the combination with a machine having a shaft adapted to be periodically driven one revolution, of a rotary magazine adapted to hold a supply of rivets and provided with radial slots therethrough, adjustable means operable by said shaft for intermittently rotating said magazine a predetermined distance upon each operation thereof, and a stationary means disposed within the magazine for effecting radial projection of the rivet shanks from the slots at a predetermined point.

4. In a rivet feeding mechanism the combination with a machine having a shaft adapted to be periodically driven one revolution, of a rotary magazine adapted to hold a supply of rivets and provided with radial slots therethrough, adjustable means operable by said shaft for intermittently rotating said magazine a predetermined distance upon each operation thereof, a stationary means disposed within the magazine for effecting radial projection of the rivet shanks from the slots at a predetermined point, and means for obstructing the slots to restrict the removal of the rivets therefrom to said predetermined point.

5. A rivet feeding mechanism comprising a magazine shaft, a hollow conical magazine keyed thereto, having radial slots communicating with the enlarged open end, a frustroconical member disposed within said open slotted end having an annular flange closing a number of said openings, said flange havin -a cut-away portion to leave the remainc er open, the said conical member having an annular eccentric surface adapted to co-act with the inner surface of the open end of the magazine to effect radial projection of the rivet shanks from their slots upon rotation of thema azinc.

6. A rivet feeding mec anism comprising a support having a table, a rotary shaft extending through the support and projecting from one side thereof, an open ended magazine secured to said, shaft and having a plurality of radial slots in its open end adapted to gravitationally receive the rivet shanks, stationary means secured to the support and extending within the open end of they magazine forcoacting engagement with the rivet heads to effect radial projection of the rivet shanks from the periphery of said head at a point adjacent the upper surface of the table, and means for restricting the removal of the rivets to said point.

7. A rivet feeding mechanism comprising a support having a table, a rotary shaft GX tending through the support and projecting from one side thereof, an open ended magazine secured to said shaft and having a plurality of radial slots in its open end adapted to gravitationally receive the rivet shanks, stationary means secured to the support and extending Within the open end of the magazine for coacting engagement with the rivet heads to effect radial projection of the rivet shanks from the periphery of said head at a point adjacent the upper surface of the table, and means for restricting the removal of the rivets to said point, said latter means comprising an annular flange on the stationary means having a cut-away portion adjacent the upper surface of the table.

ARISTIDE FREDERICK RENAUD.

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