US2616313A - Rivet feeding tool - Google Patents

Description

L. FRANK RIVET FEEDING TOOL Nov. 4, 1952 Filed May '7, 1949 2 SHEETS-SHEET 1 INVENTOR. ,Fkn NK ./1 TTORNEY.

L.. Lows N BY Nov. 4, 1952 l.. FRANK RIvE'r FEEDING Tool.

2 SHEETS--SHEET 2 Filed May 7, 1949 gm@ my@ INVENTOR. Louis ,Fie/HNR #um w. vnn. n F,

ATTDRNEY. l

atenteci lov. 4,

UNITED STATES PATENT OFFICE n 2,616,313 Riva'i* FEDING Tool.

Ldiiis Frank, Fellows, Calif. Application lv'lay i, 1949, serial No. 491,930

(ci. 'isa-4e) 1 Claim.r

iii iifiii'oiiaiit lsict of tile Iii-@seat iii'vi'ijtiii is to provide a rivet 'feeding tooll which, 'though 'also equipped with a set of rivet o'tain'ing magaiilus, is furnished with sinl rivet feeding plunger, said plunger being 'carried by amounting means upon whioh each of the tubular rivet containers is dtachably mountable for use, until the tool has 4fed to the work the rivets which it oo'itains.

Accordingly, it is an object of the present invention to provide a more simple rivet feeding means wherein the feeding of the rivets to the Work is lperfoi'ired by means containing la fewer number of parts than has' hitherto been deemed necessary Afor Jthe required purpose,

Another and more specific object is `to provideffor the tool, as a new article o fmanufacture, atubular' rivet dispensing magazine into which the rivets may be loaded in a more simple millier- A furtherobject of my invention is, to geneallyimprove uponand simplify the construction andfunctions of the existing forms of rivet setting tools of the type and character to which my invention relates.

Other objects, advantages and features of my invention will hereinafter appear.

Referring to the accompanying drawings, which illustrate the preferred embodiments of my invention,

Eig. 1 is a top plan view of the assembled/device, Eig. 2 is alongtudinal section thereof taken n li`ne2'-2 of Fig. 3,

F 3a is a plan view of one of the tubular rivet raines, separately showin 3 is a side elevation of the assembled device,

Fig. 41s a liiitildinalsetion on theplane inlicv ed by line A4 4 of Fig. 1, the seale Vbeing en 'and parts being broken away to contract 5 is iieleigai'iii `1 fiking at the left endiof tri device as shawn iii Fig. 4,

Fig. 8 is a View looking at the right handend 'of Fig. '4.

Fia 9V is fragmentai section on line als of Figs. andi.

Fig. `10 is an end elevation of the structure shown in 3, looking from linelV if! o fntlfle latter view, theA lower part of the strutture being breken 'away 13ocontract the View,

Fig. l1 is a fag'nlenta section on lille H-'L-LH of Fig. 10.

Fig. 12 is a view, partly in side eleva -onand partly in vertical mid=section, of a moo ation,

Eig. 1 3 is a seetion on the line 13e-i3 'of 14' is a plan view of a modiiioation 'of tl'e tubular rivet magazine, Fig. 15 is an' 'end elevation of the tube shown iii Fig. '14.

Referring in detail to the drawings, in ooinnron with my aforesaid copending application, the present application discloses, though with lt tions; a manually supportable tool compri 'n an ln'ga'b'ed biais bai' I5, Consisting 0f ijf vform retalnii'lg sheet material bent aio'fii'g its midl width into a narrow U'sl`lap'e as vievve'dinoross section, both s ide portions of said strip b 'ein'g right-angularly out-bent to form Vlianges I ai the opensde of the U. Within the 'space l? `e tween said side portions I6 is mounted 4 ro'catory rack bar l carrying a row of ups ing ratchet teeth I9 spaced somewhat above flanges l1.

Said a'Ck bai' IS has but a Short 'iiictdry n'ovl'llt the length 0f which iS limited by inf gitudinally slotting the bar I3 at a plurality of points as indicated at in Figs. l and 4 and provlding rivets or pins 2| which bridge the 'space between the aforesaid side portions I'G of the U-sliaped bar I5, said rivets passing loosely through the slots 20. Each of said rivets is sroundedat each side of said reoiproc'atory b'- with a Washer 22, the space betweeneach 0f thsevvashers aording a close but free tvo'kig fit fOr' Said bar. `('Oiled compl'S'SOi Aslffl'g 23, abutting against a closure 24 at the f-nt end of 'said base bar, plays a part in the reoiprocation of Said rack bar.

From the front end portion of the base bar l5 upstands a paiif spaced apart lugs 25 carrying jiv't 15in 26 to 'Wlieh is pivoted the adil l" 21 a short Sleeve 28. Said sleeve is 'dl'rleiisioned to have removably tted into it the delivery end portion of the tubular rivet carrier or rivet magazine 29 shown, there desirably being a considerable number of these tubular members supplied and all iilled with rivets preparatory for use as said members are singly mounted upon the tool. The typical mounted rivet magazine 29 shown extends substantially the entire length of the tool, and is held against rotary displacement by a pin 28a which is carried by said sleevev 28, said pin entering a slot 29a in the tubular member 29.

The rear end portion of said tubular member 29 normally extends loosely into a circular recess or hole 30 provided for it in an upstanding keeper member 3i, the lower end of which is provided at each side with a foot 32, each of these feet having an internal, horizontal groove 33 which is slidable along the rail forming flange I6 at its side of the tool.

In order to releasably latch the keeper member 3l in the position shown in Figs. 1 and 3, the lower part of said member is provided with a vertical bore wherein is slidably mounted a spring pressed locking bolt 35, the lower end of which normally interlocks with a hole or locking recess 36 formed in the underlying part of the base bar I5, the sides of said bar being pressed in at this point so as to obliterate the groove or space I I between them. In order to manually release said bolt from said locking recess, a rockable plate 31 is pivotally fastened at 38 to the back side of the keeper member 3l, said plate carrying an operating knob 39 at its upper end and having a cam slot 49 through which projects a pin 4 I Describing further the means for manually advancing the rivets 45 contained within the aforesaid tube 29 toward the delivery end of the latter, said tube is continuously slotted its entire length by means of the aforesaid slot 29a which opens out through the upper side of said tube, a 'series of ratchet teeth 41 being formed along each sideof said slot, said teeth pointing toward the front end of the tool.

A rivet feeding carriage 48, mounted upon the base bar' I5 is advanced therealong in a step-bys'tep fashion Yby means of the aforesaid reciprocatory rack bar I8.` Said rack, in turn, vis repeatedly shifted forwardly against the opposition ofthe aforesaid spring 23 by means of a trigger operated member 49 rockably mounted upon a pivot .50 carried between the two sides of a bifurcated bracket I which projects downwardly from the front end portion of the base bar I5. Said member 49 carries a trigger 52 protected by a guard 53 carried by the base bar I5. Mounted on the underside of the base bar I5 rearwardly of the trigger guard 40 is an adjustable pistol grip handle, 54 which is grasped by the operators hand.

It has been stated that the rivet feeding carriage=48 is advanced in a step-by-step fashion by the reciprocatory rack bar I8. Said carriage, like the keeper member 3I, has foot portions 60 internally grooved to travel along the track afforded by the flanges I 8 of the base bar I5. This carriage is of a hollow character and has in its lower end portion a chamber which contains a compression spiral spring 6I that presses downwardly against a pawl 62 arranged to be repeatedly acted upon by the teeth I9 of the rack bar I8. Said pawl carries an arm 63 operable by a rockable cam plate 64, said arm 63 projecting through a cam slot 85 in said cam plate, the latter being operable to withdraw said pawl 62 from 4 the rack bar to allow the carriage 48 to be slid toward the rear end of the tool. Said cam plate 64 is shown rockably supported on the projecting end portion of a sleeve 66 which passes through the carriage 48 and provides a broad. smooth bearing surface between said carriage and aforesaid tube 29. A keeper flange 61 is carried by the projecting end of said sleeve to hold the cam plate 64 in place, A knob 68 on the upper end of said cam plate facilitates its manual operation.

In order to prevent a backstepping of the carriage 48 along the tube 29 when the spring pressed rack I9 shifts rearwardly at each reciprocation, the carriage 48 is provided with an upper spring pressed pawl 'I0 which cooperates with the aforesaid ratchet teeth 47 of the tubular member 29. This pawl comprises a pin having a lower end portion which projects downwardly through a bore 'II into contact with the ratchet teeth 41, said pin being carried by a collar 'I2 that grips its midlength portion. Said collar, in turn, carries a radial arm 'I3 which projects out from the hollow member 48, its projecting portion passing through a cam slot 'I4 in the upper part of the aforesaid cam plate |64. A compression spring 'I5 surrounds the upper end portion of the pawl pin 10, said spring operating between the aforesaid collar I2 and a cover plate I6 fitted in a friction tight manner into the upper end of the hollow carriage 48.

Describing additional details regarding the cam plates 31 and 64, their cam slots 45, '55 and 'I4 are respectively shown having extensions 403:, 65x and 14:1: to allow the pawl pins or arms which pass through the cam slots to move suiiciently to permit the pawls to glide over the ratchet teeth with which they cooperate. The cam plate 31 is yieldingly held in one of its adjusted positions by a recess and dimple arrangement indicated at 31a, and the cam plate B4 is shown provided with a like means 64a yielding to hold it in adjusted position.

An important feature of the present invention resides in the provision of a single rivet feeding or rivet advancing member 'I9 which is shown supported from the carriage 48 by means of a semi-circular mounting plate I8i) attached by screws 8| to the carriage 48. The inner post of said member 1:9 is integral with and projects right angularly out from a downwardly directed'flattened head 82, slidable within the tube 29, said head being connected with the upper part of said plate by means of a neck 83 narrow enough to travel along the already mentioned slot 29a. This rivet advancing member isshown comprising a pin having a diametrically reduced outer part 84 that produces an annular shoulder against which abuts one end of a spring 8 5, the opposite end of said spring engaging a short rivet driving sleeve 86 that is slidably carriedby said part 84, said sleeve being prevented from detachment by a groove and pin connection 81,. Y

One of the improvements provided bythe present invention relates to the rivet delivery means located at the front end of the tool. It hasy al ready been mentioned that a sleeve 28 is swingably attached tov the front end portionof the base bar I5, said sleeve removably receiving the front end of whatever rivet containing tube 29 is mounted upon the tool. Said sleeve is shown having its internal diameter reduced throughout its'front end portion, thus providing an annular shoulder 90 against which abuts the front end of the inserted tube 29, thel smaller internal diameter ofthe sleeve being the same as the internal diameter of the inserted tube 29 to form a smooth surface over which the advancing rivets slide.

Adjacent to its front, rivet delivery end, the sleeve 28 has extending downwardly into it a transverse, semi-circular slot 9|, through the space under which the shanks of the successively delivered rivets are projected, and beyond said slot said sleeve carries an upwardly directed lower lip` 92 and a pair of downwardly directed upper lips 93, these three lips cooperating to form a transverse guideway for a pair of twin cooperating rivet holding slides 94 between which the shank of each partly extruded rivet is held pending its complete delivery, said slides preventing premature delivery of the rivets. Each of said slides has an arcuate notch 95 in its inner end, the notched parts of said slides cooperating to engage the shanks of the rivets as shownfin Fig. 5, temporarilyto support each rivet shank ejected into the space between said slides.

Each of said twin slides 94 is apertured near its outer end to receive loosely one end of a lever 96 the midlength portion of whichhas ex tending through it a pivot pin 91 bridging the space between a pair oflugs 98, these pairs of lugs lprojecting laterally from opposite sides of themember 28, as well shown in Figs. 6 and 7. Compression springs 99, held in place by suitable recesses, underlie the rear ends of said levers and tend to swing them to a position wherein they hold the slides 94 so close to each other that there is not quite space enough between the notches 95 of said slides to accommodate the shank of an extruded rivet. However, the notched parts of the three slides are internally beveled as indicated at |99, and as each rivet is forced out of a tube 29, the forward end of its shank encounters the bevelled portions of the slides 94 and retracts said slides suiciently to pass between them, till the rivet reaches the position shown in Figs. 4 and 5.- When in this position, the head of the rivet is opposite to the aforesaid notch 9| in the upper side of the member 28. so that, so far as the head of the rivet is concerned, there is no obstruction to the downward movement of the tool in relation to the rivet; and so far as the rivet shank is concerned, it also -will not prevent a` downward relative movement of the tool, because the rivet can (when the outer part of its shank is in a rivet hole in the work) be forced out through the isthmus |9| between the yielding slides 94 above their notches 95 and thence through the space between the upper lips 93.

In Figs. 12 and 13 is shown a modification of the means stationed at the rivet delivery end of the tool to control the handling of the fed rivets as the tool is detached from them. In this modification, a sleeve |28 is substituted for the aforesaid sleeve 28, and is provided with a downwardly directed ear |29 whereby it is pivoted to a bifurcated front end portion of the tool in the same manner as the aforesaid sleeve 28. Said sleeve |28, however, is not provided with spring pressed rivet holding jaws, but instead has the upper part of its front end portion semi-circularly cut away leaving a semi-circular rivet rest portion |39 which is loosely embraced by a fiattened spring wire |32 carried by a clip |33 attached by a screw |34 to the front side of the ear |29. Said spring wire has a pair of cooperating upwardly directed arms 36 with adjacent reversely curved end portions |31 which spring apart as the shanks offthedelivered riv ets are forced between them. vA slightly'm'odi'ed tubular rivet magazine29b is shownV in` Fig. 12, said magazine having an uhslotted'adjacent end portion 29o which carries outpressed rise 29d"po= sitioned to cooperate with a slot 29e, thus yieldingly holding the tube in the true rotational position preparatory to placing the opposite end portion in place by means of the'carriage 3|.

Said carriage 3 I, already mentioned as a'keep'er? member for the tubular rivet magai'ne,.may be shifted vso far to the rear as to leave space for the second carriage 48 also to be shifted rearward sufficiently to clear the rear end of a mounted tube 29 or 29h preparatory to removing the tube when the rivets have all been delivered therefrom.

When a new rivetV containing t'ube is mountedv upon the tool, it isv necessary that, after the front end of the tube ,has been put into place in the way already described, the long slot 29d be maintained precisely at the top side of the tube so that, when the rivet advancing member 19 of the carriage 48 (see Fig. 4) is alined with the lumen of the tube at the rear en'd thereof.

the neck 93 of the rivet advancing member 19 will aline with said slot 29a to be projected into said slot to travel therealong during the rivet feeding operation. This rotational position of the tube 29 is obtained by the use of the pin 28a carried by the swingable sleeve 28; or, i'n the case of the modified tube 29h, by thenodule or swell 29d on the latter tube which swell is slidable into the aforesaid short internal slotV 29e of the sleeve 28.r f

What has just been said willaid in understanding how a rivet-ll'ed'tube 29 will bemounted upon the tool. However, it is to be noted that, preparatory to mounting said tube', the carriages 3| and 4B will both be shifted sufficiently near to the read end of the base bar l5 to allow the operator, after inserting the front end of the tube. into the sleeve 28 to swing the rear end of said tube down into alinement with the carriage 48, andy thereupon to move this carriagefo'rwardly along the tube until the rivet driverv 19 carried thereby encounters the rearmost of the'rivets in the end-to-end row of rivets contained in the tube,` the operation of mounting the tube being completed by advancing the carriage or keeper member 3| until its spring pressed latching bolt or dog 35 enters the locking recess 36 in the base bar |5. Then the tool is ready for use, the operator, while grasping the handle 54, using the trigger 52 repeatedly to shift the rackV |9 forwardly against the opposition of its spring 23. Through the cooperation of the teeth of said rack with the pawl 62 of the carriage 48 each aforesaid forward shifting of the rack will advance the row of rivets 45 (with their Shanks directed forwardly), toward the delivery end of the tool. The front end of the shank of each foremost rivet will thus be caused forcibly to engage the bevels |99 of the yielding mounted slides 94, forcing said slides apart till the rivet reaches the partly extruded positions shown in Fig. 6, when it is ready to be inserted into the bore provided for it in the work, thereupon to be disconnected with the tool when the operator forcibly shifts the front end of the latter downwardly, the yieldingly mounted slides 94 separating suii'iciently to allow the shank of the delivered rivet to escape through the isthmus |9| between them.

The operation of the cam plate 64 and dog 7 'Ill'of the carriage 48 is similar to that of the corresponding, parts of the carriage 3l, therefore,

as an aid to fully understanding both, it need only be pointed out that when said cam plate 64 is in its normal position shown in Fig. 8, the arm 63 of its pawl 62 is free to reciprocate vertically in the cam slot extension 65a: allowing said pawl to glide forwardly over the teeth of the rack I9 each time the spring 23 (see Fig. 4), returns the trigger operated rack I9 to normal position. Also, when said cam plate 64 is in this position, the arm 13 of its upper pawl 10 is freej to reciprocate vertically in the cam slot extension 14a: so that said pawl can glide over the upper double row of rack teeth 41 as the carriage 48 advances along the tube 29. It will now be obvious that when the cam plate 64 is rocked in a clockwise direction from the position thereof shown in Fig.8, its pawls 62 and I0 will be shifted to inoperative positions making it possible to disengage the carriage 48 from the tube 29.

In Figs. 14and 15 is shown a further modification of the rivet delivery tube, designated 29m in these views. This modified tube is provided to afford a tube with a smaller internal diameter to handle rivets of a smaller diameter in the same tool as that used for rivets of a relatively large diameter; but in doing this, it is necessary in each case to maintain the same external diameter of tube so that it will properly t into the mounting means therefor. The tube shown in Figs. 14 and 15 could be made with a relatively thick wall, but it is preferred to corrugate it as indicated at 29g so as to economize material. Like the'rst described tube, it has an end-to-end slot, in this instance designated 292, and a row of ratchet teeth -291? along each side of said slot.

Thus, it will be seen that I have provided a manuallir operable rivet feeding tool that is simple in structure, inexpensive of manufacture and very effective in performing the functions for which it is intended.

Minor changes in the size, form and construction of the various parts of my improved rivet settingtool'may be made and substituted for those herein shown and described without departing from the spirit of my invention, the scope of which is set forth in the appended claim.

I claim:

In 'a device Yof the kind described, the combination with a base bar including a 'guide means which extends longitudinally thereof, an elongated rivet magazine, means to support said magazine by said base bar in a parallel upwardly spaced relation to said guide means, said magazine being furnished with an elongated rivet passage to contain a row of end-to-end rivets, a carriage mounted upon said guide means to travel therealong, a rivet advancing plunger supported by said carriage and positionable to engage the rearmost of a row of rivets in said passage to advance said row of rivets toward a point of delivery from said passage, manually operable spring held means mounted upon said base bar and operably connected with said carriage to advance the latter in a step-by-step fashion repeatedly, to deliver, to a piece of work, the foremost rivet of' a row of rivets contained in the aforesaid passage, the aforesaid rivet magazine being detachable from said base bar when emptied of rivets, in order to'be replaced by another like filled rivet containing magazine of a rivet discharge member mounted on a horizontal axis to the top of Vthe forward end of said base bar, there being ar pin and slot connection between the top of said discharge member and said rivet magazine, lips on the forward end of said rivet discharge member to form a transverse guide way, one lip below and two lips above, twin slides arranged for operation in said guide way, the inner ends of which slides are arcuate in form and bevelled to cooperate with the rivets in the rivet magazine, levers pivoted on the sides of the discharge member and engaging said slides and springs between the rear ends of said levers and said discharge member.

LCUIS FRANK.

REFERENCES CITED The following references are of record in the file of thispatent:

UNITED lSTATES PATENTS

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