US2371024A - Tying machine - Google Patents

Description

TYING MACHINE Filed Feb. l0, 1942 6 Sheets-Sheet 1 14 Z4 @afa/wxga March 6, l945 B H, BUNN 2,371,024

TYING MACHINE Filed Feb. `10, 1942 e sheets-sheet 2 Mal'Ch 6, 1945. B. H. BUNN TYING MACHINE Filed Feb. 1o, 1942 6 Sheets-Sheet 3 March 6, 1945. B. H. BUNN l 2,371,024

TYING MACHINE Filed Feb. 10, 1942 6 Sheets-Sheet 4 vMarch 6, 194 5. a. H. BUNN 2,371,024 l TYING MACHINE Mmh e, 1945. B. H. BUNN 2,371,024

Tune MAcHINE Fild Feb. 10, 1942 e sneetsfsneet e Qgg l Patented Mar. 6, 1945 TYING MACHINE Benjamin H. Bunn, Chicago, Ill., assgnorto B. H. Bunn Company, Chicago, Ill., a corporation of Illinois Application February 10, 1942, Serial No. 430,253

(Cl. U-31) 7 Claims.

My present invention relates to tying machines which automatically wrap twine about a package and secure the twine ends together as by knotting them.

Package tying machines of the general type `set forth in my Patent No. 1,606,290, dated November 9, 1926, are in widespread use in many industries. In this type of machine a rotating crank-like twine arm is used to carry one or more wraps of twine about a package supported on the machine, the wrapping operations being followed, in directand automatic sequence, by the knotting together of the ends of the twine wra-ps, and the severing of the twine. 1

Machines of the rotating twine arm type in` the past have been limited, from a practical standpoint, in the size of package which they were adapted to handle conveniently. Theoretically at least a machine could `be built capable of wrapping almost any size package desired."

Actually, however, the needfor standardization of parts throughout an entire line of machines, together with the necessity for increasing the sizes of the various parts of a machine, 'in proportion to its increase in capacity, has prohibited the building of machines for wrapping extremely large packages. The net result has been that standard sizes of machines have been adopted,

and such machines have been used by their purchasers to wrap the bundles within the limited size range for which they were adapted, and the larger packages were continued to be wrapped by hand.

One object of my invention is to increase the package size capacity'of a more or less standard package wrapping machine without enlarging the machine or increasing the radius of the twine arm, and without revising or re-locating the more complicated working parts. This I may accomplish by a simple tilting of the frame of the package tying machine so that the twine arm has a longer sweep from front to vback around an island table, pivotally mounted'within the sweep of the twine arm.

The various gears, shafts and levers, as well as the twine arm, all have an inertia imparted to them by their movement in a wrapping operation, so that there is a tendency for these parts to overrun at the completion of a wrapping operation. A brake acting on the wrapping arm of a tying machine is illustrated in my copending application, Serial No. 421,735, led December 5, 1941, and, while such a brake has proven to be of merit with certain types of machines,

an improved brake development has been incorporated in my present invention. A further object of my invention is a more positively operated arresting of the movement of the operating parts of a package tying machine upon the completion of eachcycle of operation, .in such a manner as to leave the parts free for movement at the ini tiaticn ofeach succeeding wrapping operation.

' My prior Patent No. 1,606,290 shows the use of an island table, pivotally mounted with respect tothe twine arm of awrapping mechanism, the

4mechanism being arranged to carry a reach oi twine completely around a package lying par,- tially on the island table, andvpartially on a fixed table supported on the frame laterally adjacent the island table. In the past I have employed various devices such as a stop bracket (Patent No. 1,606,290) and a twine `trap (copending application Serial No. 421,735, filed December 5,

1941) to support an island table against pivotal movement about its axis during a twine wrapping operation. These devices are suitable yfor their purpose, but where a broad island table is employed, and where a heavy package is apt to be placed on the table at one side or the other of its pivotal axis, the torque produced thereby on the pivotal mounting of the island table is apt to cause interference with the free passage` ofl a reach of twine as it is carried around a package, or to bind the side faces of a twine trap member with `the possibility of interfering with the proper operation of the machine. object of my invention, therefore, is to eliminate any stop, trap, orlike impedance in the'path of the twine by anchoring the island table of the package tying machine against pivotal movement by means` remote from `the 'path of the twine.

These and other objects and advantages of my invention will be set forth in the following description of a specific embodimentthereof, and illustrated in the accompanying drawings.

In the drawings, of which vthere are six sheets: Fig. 1 i5 a view in side elevation of a tying,

on the` offsetvplanesof the `broken line 4-4 of Fig. 2; j Fig. :5 is an enlarged A further fragmentary section taken on 'the offset planes of the broken line 5-5 of Fig. 2;

Fig. 6 is a reduced plan view of the complete machine; and Fig. 7 is an enlarged sectional detail view through the axis of the twine arm hub member. i

Knotting or twine securing mechanism capable of beingemployed in connection withmy. present invention, as #well as lother partsff =the1 present illustrative machine, may be similar to'those' of the tying machine disclosed in my Patent No. 1,606,290, In order, therefore, to simplify the present specification, the reader is referredlto that patent for an understanding of the general structure and operation of-:therna'chme,andlthe the .'present invention :from the .asame general .typewof rpatternsas zthose `usedlrfor @the zistraight .verticalframeseofnmy.priorimachines.

.5A fixed tabletop L6 l.of v.sheetf metal .is:..secured .to z the .ilppersend of .;the frame .,I I 1 as by n means Lofdorackets 1 I1, to position .this fixed ,table `in a substantially ;horizonta1 .plane .in A.spite yof the :rearward ztilt .of the frame l.achieved by .the lowerzendsasupport;arrangement. Thefcxed'tabl'e ,.top r1l-6;is;;relative1y Alarge rand. extends .rearwardly iwellzbeyondhezrear oftthe framedl. .This rearward-ly .extending .portion of the ,itable .isfsup- :ported .by an I auxiliary. leg I 8' which :may beaof .band isteel. The sfixed table .also.extends .out-

. :wardly torthe left :well beyondithe frame,fas illustrated -in :Fig. 6, :and :this .laterally extending -1 portion is supported by a f bracket i9, .the .lower end-:of whichA iszbolted .to .-the;.endvframe. .frontportion'of the fixed .tables.osetrupwardly The` throughout its entire periphery, while the righthand portion thereof has the teeth .cut away ,f

for a portion of its circumference. Throughout a portion of each rotation of the mutilated gear 40, the teeth on the right hand side thereof will be in driving engagementwith the teeth of a twine arm drive gear 43 which is journaled on the frame II. During a furtherpportion of ysuch y `'to supportaishoefll secured to the side of the of my present in- I as: at .-2-I onaline approximately. above.the knotrterfbeakfZ 0; (-Fig.'.6) Atofassist in-,positioning prop- .erly a package mounted aon the table .for vwraptlllnf-` .-An,'electric drive .motor .23,.is .mounted onta .support i plate .2.4. secured .to -a. transverse slower .frame portion 25,v andis f-.connectelwby .means of a .Vepulley 26 .and V-,drive'beltsJZ'I -to va. Veplley 28 whichnormally isadapted-torotate freely on a clutch shaft 29, the pulley 28 being adapted to be connected `by Ameans of .aclutch 30 Ato fthe clutch shaft,.29.upon operation of the clutch.

A clutch control pedal 2.33 Lis ,pivote'd .on 1.a bracketll which is ,secured `to .the'tran'sverse frame member A:25,"the 'c'lut'c'zh` pedal.' having a clutch operating rod"^35 conne'cted'thjeretm'and `'normally "held in up-raised inoperative *position by a ecoil compression springiwhic'h 'is "held incompressionbetweena cllar3I' on the clutch- -operating 1rod35 'and a 'bracket 38 `supported on the end frame member.

A :pinion 39-1is keyed "to"*the'clutchfifshaft and is in constant -meshedsengagemen't withone-side Lof .fa .mutilated "gear/140. 'The vmutilated 'geanis `in general, :similar to :that df :the :machine ldescribe'd in my Patent No. 1,606,290, the left-hand portwine arm drive gear to rhold the twine arm 'dr-ivezegearzagainstrotation during the time the shoe .is riding on the ange, and the twine arm 'drivegear is in registrywith the untoothed por- ;tionof thesmutilatedzgear.

,fnv-chain drivefsprocket 46 .tis .,-lfsecured to .wthe

twine 'armdrivefgearmo #rotate :'therewith, and

is in driving engagement with a chain lIIwhich also '-.runs over a .drivenJ-sprocketffll :which is `.mounted on, land Ais keyed--to-.atwine farmi hubf49. tightening. arrangement forethe drive chain `dll (best illustrated infligs 13, 4 and i 5) Leomprisesv a .block -150 A.pivotally mounted ...on habstub rshaft .-53 mounted in f anA v.lslpwardly-zextendingportion of the'end1frame.|-3. l'.lhe-rpivotedfblockall {.is mounted laterallyfadj acentthe chain 4.1-,-and-.is provided witharoller 54 whichfis mountedA ona stud 55 securedto vthe-blockreccentrically Vto fthe shaft-53 to yposition ther roller.fover ,.andl insrolling contact with-.the chain. ,'/Anf'adjustingscrew'56 L.is-mounted in aibracket 51, vz'i-lsc'asecuredto fthe end. frame I 3, and .is .adapted/to engage-the lup- -per surface of vthe block EIL-so thatby vvthreading .the adjusting .screw .down inthe bracketto in- .crease Athe pressure. on4 they upper-face sof 1the block, Y.the roller 54 -willbe .forcedinthedirectionofgthe'chain,A and thus may beusedtofadjust the chain tension-asrequired. :Thef'adjustling vl'screw .isy heldin adjusted-.position .bysmeans of .a lool; nut 5B ywhich jis adapted to be z's'crewed (down .into engagement -withf-the `upperwfaoe. of thebracketl y y .The twine VLarm .hub 49, .to Y. which the. driven :sprocket f48. is'keyed,'-is ;journaled in .a bearing .59 at-theupper end ofgthe:endfframe t3. .The .twine -v arm hub .comprises N-a vhollow'fshaftportion extending through the bearingflgand ,through the .driven .chain .sprocket 48, .and vis fproi'zi'ded with a .lateral opening. 63' `therein. as bes'tl`illustrated-in vFi'g."3`.thr`01.ig'hlwhh thetwrie "'d'is'passed l :Adjacent .the opening'os'thehub?a'ssprovdd with a socketed ext'ensioninwhich atwin'e armf i's secured. ."Ihei'twine a'rrhas 'aradi'gll'y 'extending portionlfand i'sjb'ent 'at ."'rig'htangles arequire'd 'distance outwardl' `jifrorn ithe =hub`to 'provide a horizontalportionf'ii having'an'j xial opening l'69 iin its outer 'or"f`re'e"end, with-ia 'lateral opening 10 providing.A access to'itliisxialpen- Aling. "The fouterendf'fthetwine'iarml 'in-*the same plane verticallya's a itwine 'c'atche :JA y'twine I'slack `l'tz'ilre-up .'l'merberfebriipri'ses L"a ibase portioh''lll Ppi-voted ftoth'efftwin" 'ili'n land having fa Ppair ffangu'larly-exridihg'in `r`s TF5 fan'd 16T-Ifo .llirn'it its llitati-iie'inovemerit. -Amtl s1-,ripari is rmountedmnftnef. pivotemmasent,sand hassan opening iin'itsiroiter iehdladapteditol irfceivea-Ltheftwi-ne. Anoilspring .'lsis .hefd in tenried by the hub 49 which tends tourge the slack takeup arm in a'clockwisel direction` frornfthe position illustrated in Fig. 4 `toexert a resilient tension on the twine and therebytakes up any slack which may occur. f i An island table anchoring gear 80 is journaled for'free rotation on the outer end 8| of the twine arm hub 49 (Figs. 2, 3 and '7), this gear being secured between spacer plates 83 and 83a `and and tooth size as the gear 80, the fixed gear 88 being secured to a bracket 89 which, in turn-is bolted to the end frame '|32 The bracket 89 lis provided with an opening 89 (Fig. '7) in its outer or gear supporting end to receive the hub 49 for free rotation therein, as is likewise the fixed gear 88, so that the hub 49 mayrotate freely vand without interference within the openings in this bracket and the fixed gear 88.

VAn arm 90 may be cast integrally with the hub 49 to extend radially therefrom, as yillustrated in Fig. `3, the arm 90 havinga transverse bearing 93 at its outer end in which a shaft 94 `(see Fig. 4) is journaled to lie parallel to the The shaft 94 has the 'pair axis ofthe hub 49. of co-' axial gears 86 and 81 keyed one to veach end thereof, these gears being alike, and, respectively, in meshed engagement with the gears 80 and 88. The` interconnected pair of co-axial gears are carried bodily around the fixed gear88 and the island table supportv gear 80 to produce a relatively reversedrive effect of one to' one rati'o between the xed gear and the island table gear and thereby prevent relative'rotation' between these gears. This arrangement permits free rotation of the hubr 49 and its supported parts, atv the same time preventing any pivotalv movementl of the island table.

The strip 84 secured to the island table support plate 83 extends vertically downwardly to the desired level of an island tabletop 95 'and there it is bent at right angles' and extends horizontally substantially the entire widthof the island table top. l

A pair of rectangular metal rods 96 and 91 are secured, one to each side of 'the outer, or right-hand face of the vertical portion of the strip 84, and extend downwardly well below the right-angle bend in this strip, as illustrated in Fig. 2. These rods are bent angularly upward as at 98 to the level of the undersider of the island table tcp, where they again are bent, as at 99, to extend horizontally under the top of the island table.

A pair of metal reinforcing straps |00 and |0| are secured to the underside of the island table, as best illustrated in Figs. 1 and 2. The central portions of these straps are secured to the under sides of the rectangular rods 96 and 91 which hold the center portions of the straps spaced downwardly from the table top, while the ends of the straps are secured to the underside of the table top. This arrangement forms a truss which adds greatly to the strength'and rigidity of the island table.

It will be noted in Fig. 1, that the tilting of the frame, while maintaining the fixed and island tables horizontal, causes thecommon plane of these tables to subtend a. materially'largerarc of the cylinder defined by the sweep of thetwine arm, indicated by the dash-and-dot.' circle X, than is the case with a twine arm of the same radius of swing, but mounted on a normal or upright frame, and with the tables horizontal with the upright frame arrangement. Such relative positioning of the tables with respect to an upright frame is indicated by the dash-andtwc-dot line Y-Y of Fig. 1.

A pair of viianged shields |03 are mounted, one on each side of the island table support plate -and rectangular rod assembly, to enclose the sides y of the island table anchoring gear 80, as best illustrated in Figs.1 and 3. A sheet metal safety guard member |04 also is secured by screws |05 to brackets |06 on the endframe |3 to enclose the mechanism on the end frame |3.

i A -twine supply bucket |20 is mounted at one end of the frame,` and a spring controlled twine tensioning device |23 is mounted on the frame tocontrol the `tension on the twine 64 as it is led intothe hollow hub 49 of the twine arm.

' Fig. 1 `shows the twine arm 66 in its normal or at-rest position, having just been released vfrom engagement by a brake |01.

lbrake in a direction of ccunterclockwise rotation from the position illustrated in Fig.' 1. o f l The forward end of the brakemember I0 ,ex

tends well forwardly from the pivot I3, asillusf trat-ed inr Fig. 4, and is provided with a rod secured to extend parallel to the pivotal axisof the brake. This rod carries 'at its innerendrva cam roller |8 which extends into the Apath of movement of a cam ||9 secured to a side of the mutilated gear 40.

The driving arrangement of the illustrated machine is intended to produce three successive rotations of the twine arm during yeach complete cycle 'of operation of the machine. The cam ||9 is positioned to engage the cam roller |8 and jmove the brake |01 up into operativel Yposition as illustrated in Fig. 4 during the thirdor Ylast rotation of the twine arm in each cycle, and to release the brake from its operative position just prior to the point at which the twine arm' drive is released by the arrival of the twine arm drive gear 43 over the untoothed portion of themutilated gear 40. This action releases the brake and frees the twine arm for unobstructed movement upon the initiation of each succeeding wrapping operation.

While I have illustrated a preferred embodiment of my inventicn,many modifications may bemade withoutdeparting from the spirit of the invention, and I do not wish to be limited to the precise details' of construction set forth, but desire to avail myself of all changes within the scope of the appended claims.

I claim:

1. A package tying machine comprising in combination with a frame, a package support mounted on the frame, a bearing carried by the frame above and at one side of the package support, a twine arm hub journaled in the bearing, a twine arm mounted on the hub, an island table Y mamen 'gpivotaly suspendedwvithnitespectwto@thezftixzrine4 iawtwineiaxm;mountediondhe hubandfffanlisiand :,armshub; a--xedrianchorimemberrcarredibydzhe ffr'amea andzmountedfincgaxiahalignmentf with;4 the hub #beyond the twine '/armgwand means caried-.by

the-.xhubf and vhaving .aintereengagementf' with the exed anchor member-@and f- ;the island-stablefeto anchor the 2 table against pivotal movement-dur- `ing: 21k-rotationA lof'.tloefliub.andits ,supDQrted twine farm. y

f2.; ,A g package tying nnachine 4 sooInprisi-ng in combination with a iranien a,1package eSupport f mounted on r the frame,` faz bearing :carriedabyithe frame abovefand at one .iside of thepackagefsuppara` a etwine farm hub -jour-naled mathe-hearing, a ftwine Aarm mounted-lon-the-gl-iub, fai-idaanv` island Asizable: r-,piv.ota1ly f suspended Withwiespect to rthe san. island `table {pivotallyf 'suspended -onlthmyine co-axially with butti-independently of theahub beyondthe ltwine arm,.,a secondgear .secured lto the, island .table .in coaxial relation @to theflxed -gear, ar bearing carri-'ed bymhelhub fecoentroally thereon the'pa'xis fof the 'bearing lbeing .substantially parallel to` .the paxis of 'fthe-,hun a 'shaft Vpivoted .in @the latter.` bearing; and atpair )oncotoothed (engagement with vtheliixed ,geanand with ,40

fthe? .island v.table gear to., anehorlth islandta'ble .againstpivotal'movement on rotation ofgthihub .andits s'up'portedpa'rts. l 3

v- ALA. ,-vpaokage tying machine oomprisinglfin Acombination with a frame, a`.,-package`.1support mounted .on-the fr-ame, a. bearing iia'xriedI byl-the frame above n and vl at ,.onelsiide of? 'the package ...the n tablega-piyotally:fsuspendedflwith respect .todithe iframe;a'seeondsgeammountedfon the islandatable co-axially with the xedffgearfwandxinterconmeetedfqgearameans fcarriedwbyJ-the @hubaand in ,-meshewith thenfixedf, fgearwvand with-therfisland table gear,f,=1;espectively,r.to be@actuated` ona :rotation ofithe-hub .tmprodueelafrelativelyrewerse drive eectoffone-Ytoone:pratio'ibetween the fixed .geanfandfthefislandttableggearfWherebyftherela- ,.tiver,rotation. of.'x the: thubfnsupported u interconneeted gear-means .A produces-f a resultant :zero rotation of the island table gear fvwith-respectz-to ltheJXedgeiar.

e" 6..-In combination ineatyingarnachine; a--svupgporting rame.s'tructure,alfixed .table-carried by lsaidlffr-:auna,struct-ure foin-p.arti-ally`4 supportinga gpackagenitosbei-itied; thewpackage extending@im` :this purpoSe-beyond one .edge of ltlnefrtabla-aerank l type twinearmipivoted onthe framefandsadapted to rotatemo lcarliryiitszfree-end in 4an ,orbitfadj aoent to saidsedgaoithe fixed table to-.1ay..fa Wrap l.ofwinen about t-,hempaokagef` anlisland t supporting structure i pivotally-,supported on they axis of ro- -.ftation 'offrthtwne arma'ndlextending.Withinthe orbit -of the arm adjacentqtobut spacednfrom 1.the

' fixed-tablefedge ;for.additionelly4 supporting the package, tha-twine armv-beingadapted .to ,pass entirely 1 aboutmhesisland w.supporting f-rstructurerin desei'ibing thetwine laying yorbitaand mechanism i'or anchringfvr. the islandfsupporting strueturesin stationary..,po'sitioni. relative `lvto fthe Lxed. table minimising.meansgmounted in stationary relation '.tothe fixed table andmeansnlovable f relative to he 'xed tableiduring ,therotation Wof the rtwine arm but cooperating ,with said stationary/means VforImai-ntai-ning" `ithe cislanci...s umoorting .structure y iat 1 all ltime's VIA.in .said .stationary position.

portinglframe structure, a'. xed ftable AVVcarried* .by 'said "frame, "simucture'L on,partiallyjsupporting` i a .package Ltol mbe. tied ard'gektending vbeyond oneV V50 am .,exten'ding' ivithingthe orbit-idf the armad- :jai nt't 'but spaced rom `.the edge. bf Y.the Yxevd "table" Tor "additionally supporting' thenpackage, and mechanism ior .anchoring vthe islandlsnpport- 'ing structure'lJinstationary` psition relative `to '.'sciated .Withthefisland supporting structure and pmeansiinterengaging'.witnidiierentfpoints of said 'feleni'ent' in the course L of 1 every .cyc'lef Tof rotation '.fof the twine arm Lar'idl i constantly cooperating "position BENJAMIN H.BUNN.

'17 .In ,com-bination in. ahtyingfmachinewa .s up;

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