US1997438A - Rivet setting machine - Google Patents

Description

April 9 1935- v E. B. sTlMPsoN ET AL 1,997,438Y

RIVET SETTING MACHINE Filed FebVZO, 1933 l2' Sheets-Sheet- April 9, 1935.

E, E. STIMPSQN ET AL RIVET SETTING MACHINE Filed Feb. 20,1933 5 Sheets-Sheena INVENTORS April -9, 1935. E. B. sTlMPsoN :TAL 1,997,438

RIVET SETTING MACHINE Filed Feb. 2o, 1933 s sheets-Sheena lle ATTORNEYS Y Patented Apr. 9,

Y l UNITED' STATES leerlas mar ss'rrmo naomi: i Edwin n. suin'psnn ma Julius dunnere, rmklyn, N. Y., assignors pany. Brooklyn. York to l. B. Stlmpson OomlN. Y., a corporation of New Application February zo, 19:3, seria No. ssr,4az.

" The present invention relates to'improvemenrts ln rivet setting machines and more especially in rivet setting machines of the treadle operated Thepresent improvements relate to simplification and 4to power mechanisms of a treadle operated rivet setting machine wherein it is particularly desirable to conserve the energy of the operator and4 to apply 'the same most elciently to produce the rivet setting operation. Machines `of this type are usually operated by operators of limited mechanical knowledge and skill, and, therefore, it is desirable that such machines shall be as. simple inconstruction as is commensurate with strength and durability which the usage -of these machines require. It is particularly desirable that machines of this type be of such design as to facilitate economies in manufacture because inthe majority of cases, the machines are leased without fee to .rivet users by rivet manufacturers whose compensation is received through the sale of rivets. Therefore, machines which are expensive to manufactureresult in a very large-outlay of capital by the,rivet manufacturer, ad any economy which may be produced by novel designs is of extreme importance in this type off device. 4

Devices of this character must be provided with` `feedan'dinthepresientcasea primary element in the feedl construction is a rivet feeding cup. l' It has been the practice of the art heretofore `ib utilize cusmanufacturedby machining -an iron casting. These cups changedfrom time to time'by the user when different.sized rivetsare used and the cups areI ofter dropped the operator during such changes. Cast iron cups break'when dropped on hard floors, and the machine operations in producing the cast iron cup is an expensive proceeding. Furthermore, cast iron cups are heavy and since the cup is started and vstopped 'by each treadle operation, a subi;

of the heavy-cup at each operation. i 'i The present invention comprises'ma cup having-j.

wn metal cup portionilnserted within ama-'- chined metal rim and provided with a staked tubular hb. In the manufacture ofthis novel cup, the cup portion is formed of thin sheet metal be embodied in'structures other than those'spedrawnto Vshsfpe. The hub is cut from a small wrought meta'ltube; and the lrim is a section from a large wrought metal tube in which are machined the rivetfreeding slots and a Ashouiaer to receive the rimof the pressed metal;cup.` The parts aregthen assembled by pressing operations and the result is a cup of malleable metal'ofw. weight less than one-half the weight necessary to providea cast cup of the same strength. l Furtherl more, since the metals of the assembled cups are i malleable, they are not easily broken by dropping or being subjected to rough usage, and the cups are very economical to manufacture.

Another feature of the present invention is the I Another feature ofl the present, invention'is a" 'simplified ratchet construction comprising 'dupli-` cate pressed metal members' which when asseml" bled form a light weight ratchet 'wheel of adequate strength to operate the feed cup, -Another feature of the present invention is the rivet holding cup jawswhich comprise'a single stripof spring material provided with cox n plementary rivet cups to hold a rivet in pos'ition to be set.

Another feature lates to the feeding head 'franie and hopper which of thepresent invention re- -I are formed of a single piece-of light weight sheet metal. thereby combining sturdiness with econ- .ony of weight `and valso providing a structure which may be very economically manufactured. A further object of the present-.ihventionis the construction ofan open feed hopper located adjacent the feed cup whereby a substantial part of `the tgp of the rim of the feed cup at the top ,f t'hereof is unobstructed by guides so that Vany rivets `whiclrmay be carried upwardly by the 'feed cup are rel for subsequent feeding operations.

The above generally descri mechanisms: toether' with otherdeatures wi be more specifito fallback 'into the cup l cally described in the detail specification herein-y after following.

n is realizedtnatftne present inventions may emcauyjdisciosed herewith, and, therefore. -it 'is to be understood that the. disclosure isto be oonsideredaslillustrativeand notin -the limiting I shorten i of the machine shown in Fig. 1.

' spring member. is formed.

Fig. 3 is a detail front elevational view of the feed hopper frame.

Fig. 4 is a side elevational view of the hopper frame. l

Fig. 5v isa front elevational View of the feed cup. v

Fig.A 6 `is a side elevational view of the feed cup showing a portion thereof in section.

Fig. 'I is a sectional view through the' rim of the'feed cup shown in Fig. 6.

Fig. 8 is a plan view of one of the ratchet members.

Fig. 9 is an elevational view of the ratchet member lshown in Fig. 8.

Fis. v10 is anelevational view of two members of the character shown in Figs. 8 and 9 assembled face to face to comprise a complete ratchet wheel.

Fig. 11 is a side-viewof the rivet spring cup.

Fig. 12 is a front view of the rivet spring cu'p.

Fig. 13 illustrates a blank from which the rivet feed - Infisni for the rivetsetting punch.

'Referring now more especially to Figs. 1 and 2, `a hollow pedestal frame I isprovided with a base 2 in which a treadle l is secured Abya pivot shaft 5.- A coil spring 6 is anchored to one endof the pedestal frame and atthe other end of the treadle B to normally lmlcd the treadle upward against an adjustable rew stop 1 mounted on the front of the pedestal frame `I to provide an adjustable Ilimit stop for the upper position of the treadla A similar screw stop l is mounted beneath the treadle in the base frame I. A head frame s Vis bolted to the pedestal frame 'I andcarries the feed mechanism` and' .the rivet setting devices. A'f main link i0 connects the treadle 4 with a main toggle lever H which ispivoted on a short shaft I2 in the head frame l. A main toggle link Il through apivot shaft Il, connects the main toggle lever H with a secondary toggle lever I! mounted on the operating shaft IO. for the rivet-V feed. A secondary toggle' link vIl connects the secondary toggle lever Il with the plungerwhich carries the rivet settinghead. Byreferring to Fig. 14,` it will be observed. that when the treadle operates topull the main link Alil downward to its limit of movement, that the' pivot of the main toggle lever 1|, the connection between this toggle lever` Il and the main toggle link Il, all assume a straight line andat the same time the pivot of the secondary toggle lever, the secondary toggle link i1 and the axis of the plunger il also assume a straight line. 'I'he operation of the main toggle and the secondary toggle produce a very powerful pressing action relative to the lower limit of stroke of the plunger il. The operation of the toggles and the plunger is practically a free movement until the rivet setting operation beginsv at which time' the main toggle and the secondary toggle are approaching a straight line conclusion of movement, at which time theoperator'sforce on the -treadle is very eective to vapply great pressure to the' rivet setting mechanism The head frame I is provided with a strongextension anvil arm Il carrying an anvil l0' which is mounted lfor vertical adJustn'xent` by means ofthe lock -nut adjustment lscrew Il.

Lacasse The sheet metal feed frame is provided with a' circular recess 2li and with a flange 2t which is adapted to be positioned adjacentthe periphery ,of the rim 21 of the feed cup 28 which is mounted on the operatingshaft I6 with the hub 20 of the feedcup 2l frictionally pressed Aagainst .the bottom oi'.` the recessed portion 2l of the feed hopper' frame by a spring spider SII which -is seated beneath the removable wing nut 3|. This construction facilitates removal of the feed cup 2l when it is desired to change cups for differ- `comprising small washers through which securing rivets l1 extend. Sheet metal arm guides Il and Il are secured to the curved arm ll by means of similar securing rivets 11 and spacers Il. The lower end the curved senil-circular guide Il is vlangularly inclined at 4U andthe upper ndV of the varm guide ,89 is correspondinsly inc Il to provide a junction portion between the semi-circular space 42 between the rim 21 of the cup 2l and the semi-circular guide Il. This space extends into the inclined space or rivet track Il which leads to the spacel 45 forming the vertical track between the guides II and 3i. llhe lower'end'of the vertical track Il 'is bridlied by the rivet holder spring cup Il (see Figs. 1, 2. d11., 12, and 13). This spring'up is formed from aV blank of spring material lprovided with a pair of spring arms l1 and 4l which are connected by a bridge I! that leads to .extensions il and 6I. riveted through the curved arm Il of the feed frame 22 in such manner that the spring-'cup members!! and M are in the path of the rivet setting head l! which is carriedon the plunger I8.

'Ihese extensions 50 and Il are preferably It 1s desirable that rivets shall be fed one at a time to the rivet cup 4l and to this end, a feed ann Il is mounted about'half way up on the curvedarm I4 of the feed frame. This feed arm 'A guide Il, a suitable spacing washer and into the' boss Il. The upper end of the feed frame is held in'position by extending over the main shaft II and beingforced against the top of the head frame by the spring spider 3B which holds the feed cupin position.

Referrlng'now back to the feed arm l0, the

frontend of this feed arm is provided. with a flnger I0 that normally extends into the vertical track Il for the rivets. 'I'he other side of the feedV arm is provided with a curved surface il. the center of which comprises the axis of the stub screw Il. 'A rivety pocket I! is. provided between the finger Il and the curved surface 6|. The

power end of the feed arm In is connected by a bent offset link I4 secured tothe connectionlbatween the main toggle link and the secondary 'tossle lever so that when the tossle operateatlle pocket62 is of such size and shape as to-accomvmodate the stem of a single rivet. When the cut-olf or feed arm 56 is oscillated, the finger 6I moves downwardly and ythe curved stop surface 62 swings across the vertical track 45 to intercept the 4verticalvmovement of the rivets in the feed track 45 above the single rivet which has been resting on the finger 60. Continued movement of the *cut-off `arm removes theflnger 60 from the path 45 and permits the selected single rivet to fall downwardly `in the lower portion of the track 45 and to drop off of the track into the spaced apart spring cup members 52 and 54 with the head of the rivet supported in the cups and the stem of the rivet extending downwardly in a vertical direction between the spring arms 41 and 48 of the spring cup hol'der 56 so that when the rivet setting head 55 descends, it will descend directly over the rivet and cam the spring arms 41 and 48 outwardly,thus releasing the rivet and carrying the same downwardly against the setting anvil 20.'

In the operation of the device, it is desirable that the feed cup 28 shall be given an inter-v mittent rotating movement. This is accomplished by va ratchet pawl 65 mounted on the pivot shaft I3 connecting the mainv toggle link I4 with the secondary toggle lever I5. This pawl engages ratchet teeth 66 onthe ratchet wheel 61 which (Figs. 8, 9, and is formed of two stampings of sheet metal. These stampings are identical and comprise a blank having turned in teeth members 66 which preferably are of an uneven number so that when two of these blanks are set face to face, the ends of the teeth 66 on one blank comes opposite solid metal on the other blank. Thesev blanks are also provided with outturned rims 68 to form a hanged guide for the pawl 65. The ratchet wheel blanks are also provided with a shaft opening 69 which fits over the main shaft I 6 so that when the ratchet wheel is operated, the, shaft IIS is turned.

It will be observed that the space adjacent the feed hopper 24 on the rim 21 of the feed cup 28- is an open space not associated with rivet guides.Y

This open space facilitates the automatic gravity removal of any rivets which may "be carried 'outwardly during the .operation of the feed cup 28.

'The rivet setting device herewith disclosed is economically manufactured, efficient in the use' of manual power to set rivets and is sturdy in construction.' The construction of the operating parts, particularly the rivet feed cup is such that light weight metal may be' used, and, therefore, the operator wastesV little power in overcoming inertia of heavy'moving pai-ts. Furthermore, the entire feed mechanism is of such light weight sturdy construction that the removal ,of `the stub screw 51, the mounting screw 59 and the wing nut 3l releases the entire rivet feeding device from the machine so that it may easily be replacedrby one of a dierent size for handling different types and kinds of rivets.

What we claim, is: y

l. A device of the character described comprising a frame, a main shaft carried by said frame, a rivet feeding cup mounted'on said main shaft, a friction clutch operatively connecting said cup with said main shaft, a ratchet wheel mounted on said main shaft, a manually operc able member for operating said device, an anvil,

a plunger cooperating with said anvil to set rivets, a plunger operating lever pivoted on said main shaft, a' pivot shaft connecting said lever with linkage mechanism leading to said manually operable member, and a ratchet pawl mounted on said pivot shaft and adapted to engage the Vteeth of said ratchet wheel whereby said main shaft is rotated when said plunger is operated.

2. A device of the class described comprising a frame, a manually operable member adapted to` apply manual forces to operate said device, an anvil, a .plunger adapted to cooperate with said anvil to set rivets, a main'shaft carried by saidl frame, a rivet feeding cup mounted on said main shaft, friction means operatively connecting said cup with said main shaftaa plunger operating lever mountedy on said main shaft, link mechanism operatively `connecting said manuallly operable member with said lever, and means connected to said lever to intermittently rotate said main shaft in the rotative direction of movement of said lever when .said lever is operated to cause said plunger to set a rivet against said anvil..

3. A device of the class described comprising in combination a frame, an anvil, a plunger carried by said frame and adapted to cooperate with said anvil to set rivets, means to apply forces to operate said device, a main shaft, a rivet feeding cup carried by saidmain shaft, and means to intermittently rotate said cup, said rivet feeding cup comprising a notched rivet feeding rim, a sheet metal cup member secured to said rim, and a tubular hub staked to said sheet metal cup.

' 4. In a rivet setting device, the combination of a frame; rivet setting means carriedby said frame; rivet feeding devices comprising a sheet metal back frame having a hopper portion inte-y gral with said back frame and a substantially vertical rivet chute base integral with said back frame, whereby a single integral piece of sheet metal comprises'said hopper, said back frame, and a rivet chute base; a feed cup adapted to cooperate with said back frame; and rivet guides carried by said back frame to guide rivets. from said feeding mechanism to the rivet settingy y6. A rivet setting device comprising in combination mechanism for setting rivets, devices to feed rivets .to said setting mechanism comprising a plunger, and a spring cup adjacent said setting mechanism to hold individual rivets in the path n said plunger, and a bridge integral with said y spring arms to provide apassageway for rivet stems.

7. A rivet setting device comprisingvan anvil,

`a rivet setting plunger, feed mechanism ineluding a substantially vertical feed chute, va pivoted rivet selector cooperating with said feed chute to feedrivets one at a time beyond said selector, said selector comprising a nger extending across the feed chute, a rivet pocket adjacent said finger and i for with a passageway leading from said bridge an utotfportion-,a'djacent' said rivetl -hoider ompr'ising an integral -member provided 'with springarms terminating in a pair of opposed half eup.lme'mberswith said spring arms acting to normally force-said-.pairl of half cup members together, and a bridge member integral with said arms and comprisingthe support theremember and between the -mtom portions of said cup members. v

9. A feed 'cup 'for selectively feeding articles, said feed cup 'comprising' a sheet metal cup mem-l ber, a feed rim provided on the face thereof with feed notches through which articles to be selected are fed, a shoulder provided on said rim,`the edge of said sheet metal cup cooperating` with said shoulder on said rim whereby said cup comprises f the sole support for said rim, and a tubular hub staked to the back of said sheet metal cup where.-v by said hub comprises the soie support for said cup, the axis of said hub and said cup being substantially coincident.

. EDWINB. STIMPSON.

^ JULIIUS GUALTIERE.

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