US1683815A - Screw-driving machine - Google Patents

Description

Sept, 11, 1928.

a. c. BROWN ET AL SCREW DRIVINQ MACHINE Filed Nov. 2, .1925 '7 Sheets Sheet 2 2m GCBmwnandG/E'MNulty Sept. 11, 1928.

1,683,815 G. c. BROWN ET AL SCREW DRIVING MAcH-INE Filed Nov. 2, 1-925 '7 Sheets-Sheet 5 V a gwuvntoz Se t. 11, 1928.

G. c. BROWN ET AL SCREW DRIVING MACHINE Filed Nov. 2

m m M GCBmwn and GFMSA/UIZZI 8g, v h a ii/M Sept. 11, 1928.

G. 0. BROWN ET AL,

SCREW muvme MACHINE v .7 Sheets-Sheet 5 File Nov. 2. l925 jwuantow GCBmwn andGEMWulgy Sept. 11, 1928.

'7 Sheets-Sheet 6 G. C. BROWN ET AL SCREW DRIVING MACHINE Filed Nov. 2, 1925 Patented. Sept. 11, 1928.

1 N TED" STATES on 6. BROWN A111) onnoomr r. MGNIVJLTY, or MASSILLQN, omo, nssmnons rro rm:

REYNOLDS-MACHINE COMPANY, OF MASSILLON, OHIO,

SCREW- RIVING macnmn.

pphcation filed November 3, 1925. Serial No 55,223.

The invention relates to mechanism for driving screws andmore particularly to-an automatic n mltiple spindleinacliine.

The object ofthe present improvement is .5 to provide a screw driving machine having a plurality of 'driving. spindles and provided with one or moremagazines which simultaneously feed screws to the several spindles, all of the spindles being simultaneously opera-ted 10 to drivethe plurality of screws atone time; means being provided for compensating for variation in the lengths of time to drive the several screws; a work carryingtable being provided upon the machine and arranged to L be automatically raised as the mechanism is put into operation. j i y e d An embodiment of the invention is illus- V hinted in the accompanying drawings, in which} 7 v v Figure l is a front elevat-ionfof the improved screw driving machine; Fig. 2, aside elevationof the same with parts broken away; i

Fig. 3', a plan section on the line 3-3, Fig.- ure 1, upon a larger scale;

Fig. 4, a vertical sectional view through one of the chucks showing the compensating meansupon the driving spindle;

Fig. 5, a plansectional view of one of the screw magazines and the multiple feeding mechanism; V I 1 Fig. 6, a vertical sectional view of the same;

Fig.7, a detail perspective view ofithe' es,- capem ent mech anism, showing a fragmentary portion of the feed magazines; 5

Fig. 8, a detail perspective view blade;. 7 I

Fig. 9, a plan view of the escapement meclt anism in the cut-off position; I Fig. a similar view of theiescapement mechanism in the leasinga screw, an s Fig. 11, aperspcctive view of the gearing by means of'which the several parts ofthe mechanism are driven. r e

Similar numerals refer to corresponding partsthroughout thedraiwmgs' i i The mechanism is carried bya standard '1 having the enlargedbase portion .2, upon the rear portion of which maybe mounted the motor-3 for drivingthe mechanism. A pin:- ion 4, uponthemotor shaft 5 meshes with a gear 6, upon a hort horizontal shaft 7, said shaft heing provided with a bevel pinion 8 of the cam giosition just prior to ref meshing with a bevel pinion .9 upon-the vertical shaft 10 which extends i' piv'ard throlugrh the hollow standard 1, thebevelpinionsbeirig preferably located .withina housing 12'. y Q iAlthough any desired number ofscrews may be simultaneously driven by a Ina-chine of this character, the particular n'iachine hulls trated in the accompanying drawingsis designed for driving four screws at one time;

For this purpose driving bits arejrequiredand the machine, is 'rovided withtwo magazines each ofwhich eedsthe screwsit-o two ofthe drivin'gbits. f i Each. of the magazines 13 is rigidly sup ported at one side of the. standard lyas by a bracket 14. These magazines are substantially circular in plan view, and ,eachcomprises an annular side wall provided with an arch or spider'lfiwhich supports the bearing 16 for the spindle 17 upon the lower end portion which isfixed the conical. dial 1.8 having a hub 7; 19 fixed upon said spindle. The dial. 18 is inclined downward t wa its periphery, which is, located inthe same horizontal plane with {the beveled. annular flange 20 in .the'lowe'r' edgeiof the magazine side wall, and spacedtheretrom 'adistance corresponding to the diameter of the'jshanks of the screws toJbe depositedtherein;

circumferential edge of the dial is likewise Mounted upon: diametrically per tions. ofthe sidewall of the smagazine are g5 bearings 24 1 Within which are journaled shafts 25 carrying the circular brushes 226;,

the diameter of each brush being suchthat it will brush back any surplus serewstwhich maybe carried forward by the dial, allowing m' only those screws to pass which aregnse] pended by their heads the annular-run way. v 1 A guardring 2 7;is connected totheinner Wall of the magazine, slightlyabove the 1g; flange 20, and extends from apointrbeneath the center ot-each brushto' a point just beyond the eo-operating escapemen mecha. nism, which will be later described.

This {guard ring is spaced,

A conrolmrxoner omo.

above the flange and the periphery ofsthe rotating; dial 18, a sullicicnt distance to permit the heads of the screws to pass freely beneath the same when the screws are"hangingrvertically1n the lnnnularrunway,=but is sufiiciently closeto the runway to prevent any screws passing beneath the ring excepting those--whiclr are suspended in the proper position.

Aiworm wheel 28 is carried by each brush shaft and meshes with a worm 29 upon a worm shaft 30, each of thesejworm shafts having a spiral gear 31 which meshes with a spiral gear 32 upon the magazine drive shaft locatedtransversely through the machine Q shaftlOQ y Y,

lfllh e upper end ofthemain drive shaft 10 is provided withabevel gear 35ffupon the horizontal shaft 36. Acounten shaft 37 is driven from the shaft 36 throughthe -gears 38. A gear 39 is mounteduponthe shaft 37 and meshes and driven by. thefmain drive with a gear 40 upon the short vertical shaft shaft 33 through the gear1ng42L p a y p For the purpose of pernuttmg a" discharge 41 {which drives: the

ofrthe pendent screws, one at a time, into the tubes5l3,"wl1icl1' lead to the "chucloi -14, 'an escapement mechanismis provided upon each side ofeach magazine, at points substantially halfway, betweenthe brushes 19. Each escapement mechanism is mounted in a casefetii, which is of channel shape in cross section and connected at its inner end to the lower edge 0f the" rnagazine wall. As best illustrated in F igi 5,these escapement'cases are preferably located at an angle to a radius of themiag'azindand the inner end of each case 'isfangularly recessed, as shown at 46,

to rcceiiieftlie,screivs from the annular runway. g i a Ane'scap'ement finger 47 and a cut-off finger l8 are slidably' mounted Within the escapement case, the finger 47 being provided with the'jcurvedirecess 49 at its innereX- tremityto receive the screws, one at a time, as they enter thegesc'ap'ement ease, whlle the cut-ofl' finger 48 is provided with the beveled I are provided in ment cains' 56, one of innerext'remity 5 0 for the purposeofcutting ofifthe'admission of screws to (the escapement'case after onescre'w has beenrele'ased by thejescapement finger.

- "The escapement and cut-off fingcrsare renponitheir adj acent fa ces, as indicated sit-51,150 permit of longitudmal movement ofthe fingers upon each 'sideof the cam blade 52, andveiticallydisposedgrooves '53 and 5 4; the escapement and cut-off fingers, respectively, toreceive the escape- V which is provided upon each ,sideofthe cam blade-52.

A roller-yoke 57 islocated upon the escape ment casing, the rolleryfi8 being journaled therein and engaging the outer edge of the cam blade 52, and anoperating rod 59 is spending in number to the withfa bevel gear 34, meshing connected to the upper endof each cam blade and arranged to be reciprocated, as will be later described.

For the purpose of'operating the screw driving bits a'ishort vertical shaftbO is rotated from the shaft 36, as by the bevel pinionsGl audprovided at its lower end with a gear 62. This last named gear is located within a housing (33, supported in front of the standard 1, a plurality ,of sleeves 64, correscrew driver bits, journaled in said housing, each of the sleeves being provided with a pinion .65 meshing'with the gear 62- f 1 i A shaft G5 is journaled through each sleeve and provided at its upper portion with a friction disk (37 arranged to be normally held in frictional engagement with the triotion disk 66, upon the upper end of the sleeve, by means of a coil spring 68, whereby motion is transmitted, byfriction, from eachsleeve to the corres Jonding shaft 65.

The chucics '44 are carried upon a, rigid b 'acket 70, fixed upon the front side of the standard Land the screw driving bits 71 are mounted for rotation and vertical movement within said chucks. The bits are journalcd in a vertically reciprocating crosshcad '72, and for the purpose of compensating for variat-ion in thelengths of the screws or a dif ference inthe time when the various screws take hold in the material into whichthey are being driven, each bit is formed of'two secbeing tions having longitudinal movement there between. p y g The upper section 73' of each bit is ]01llnaled 1n the crosshead andlha's a sleeve 7-1 iixcd to its lower portion, the lower eritremity gagement with thenut 79 in the lowcriend vmeans of a telescoping spindle 80,univ ersal provided at each" end thereof, whereby the screw driving bits may bespaced; apart in any desired arrangement regardless joints 81 being of the location of the spindles 65.

Eachchuck 44 isprovidedwith a vertical bore, in which may be located a bushing or filler tnbe'82 withinwhich the corresponding screw driving bit 71 is rotatably and slidahly located. Each tube or chute43'lead's from the adjacent magazine toone of the chucks,

the bushing being cut awayt'o permit screws from the chute to enter the bore.

The lower end of the bushing or filler tube is extended below the lower extremity of the said 1 shoulder,

chuck and. provided :with diametrically opposed openings 88 to permit the entrance of the inturneddower ends 81 ofathetjaws '85.

1, These jaws consist of elongatedystrips of metal fnlcrumed intermediate their extremi ties, as at 86, upon'flanges87 'forlnednpon the sidesofthc chuck. I

a A coilspring 88 is placed between the upper end ofeach jaw and the'zadjacent side of the chuck to keepthe lowercndsoffthe jaws normally pressing in toward eachother.

Semi-funnel shaped grooves89 areformed I in theyopposing faces of the lower extremities of the jaws, andwhen-a screw is fed to the chuck the screw threaded "point thereof en ters this fnnnelshaped, opening; and the jaws are forced apart as the screw is forced down between them by the hit, the jaws holdingthe screw straight and steadywhile itQis being driven into the worln The operating treadle'j90wis pivoted within the standard 1, as at 91, and intermediate its extremities is pivotally connected, as at '92, to a vertical rod 93. A spreader 94 is connected to the upper end of the rod 93 and two vertical rods 95 are connected at their lower extremities to opposite ends of the spreader and extend upward through the standard 1, emerging therefrom at a point spaced from the top, as through the bearing bosses 96.

i The tie bar 97 is connected to the upper ends of the rods 95 and provided with 21 depending lug 98 to which is pivoted one end of a lever 99, the opposite end thereof being pivoted to a stationary portion of the standard as at 100.

A lever 101 is pivoted intermediateits extremities to the upper endof an upright link 102, the lower end of the link being pivotally connected at 103m the standard. This lever is connected, at a point between its fulcrum i and its forward end, to a link 104, the lower end of said link being pivotally connected to the lever 99, intermediate the extremities thereof. V p

The forward end ofthe lever 101 is connected to the central portion of a transverse spreaderor cross arm'105, from theextremt ties of which depend the rods106, the lower ends of said rods supporting the crosshead 72.

weightllO. The Work carrying table 111 is slidably mounted upon guides 112, formed upon the front facesof the standard, and may be adjustably supported-upon the rod 113,

by means of the spiral gearing 114 arranged to be manually adjusted as by the crank 115.

The lower end of the rod 113 is connected to thesubstantially horizontal arm 116 of a bell crank, pivoted at 117 upon the standard,

and .pravl'ided: :with the depending mm 118 having a camsurfaee l lti atits-upper portion and the arcuate surface 120 at its lower-per t1on,sa1d arc being, substantially drawn from the centcr91. a A roller 121,,upon'the trcadle 90, isarranged to engage the surface of the dependingarm '1'18'ofthecrank. v

, With eachdepression of the treadle 90 the work table 111 is raised until the roller J21 rides off -of' the cam surface 119 of,the,- bell crank, after wliiclrthc roller rides uponthe arcuatc surface 120 thereof,:hol ding the table in the raised position. At the same time-the forward-endof the lever 1.01 i-s pulleddown through the rods 93and195 and lever 99 and link 104, simultaneously operating all of the each side of each magazine through the corresponding tube, or chute 13 into vone ofthe chucks. At the same time: the screw driver bitsrarejhrought down through the chucks,

into engagement with the screws simultaneously driving all of the screws into the work.

The compensating means, shown in- Fig. 4 y

of the drawing, allows for any variation in the lengths of the different screws or any vaQ riation in the time at which the different screws take hold in the work, thus permitting each screw to be properlydriven home after which the friction drive of the screw driving 1 spindles prevents further rotation of the spindles.

As the treadle 90 is released, and permitted to raise, the escapement and screw driving mechanism will be raised to the normal position while the table will be lowered permitting the finished work to be easily removed.

and new work to be placed thereon.

We claim:

1. A screw driving machine including a magazine forcontaining screws, a plurality magazine, a chuck communicating with each escapement means, a screw driving b t rotatably and slidably located in each chuck,

means for simultaneously operating said es' 7 capement means, to admlt screws to, the

chucks, and lowering the driving bits through the chucks, and means. for compen sating for variation in the lengths of time to drive the several screws.

of escapement means associated with the 2. A screw driving machine including a plurality of chucks, a screw driving bit rotatably andflslidably located in each chuck,

means for simultaneously admitting a screw to each chuck, means for simultaneously operating all of the bits andmeans for compensating for variation in the lengths of time a to drive the several screws.

3. A screw driving machine lncludmg a plurality of chucks, a screw driving bit rotatably and slidably located in each chuck, means for-simultaneously admitting a screw to each chuck, means for simultaneously operating all of the bits and a spring pressed secerailscrews.

.eapement means to admit screws to the chucks, and. lowering the driving bits through the 'chueks,and a spring pressed sectionin' each bit' for compensating for variation in the lengths of time to drive the sev- '5. A'- screw driving machine includin e magazine for containing screwsya plurality of escapement means associated with the magazine a vertically reciprocating operatingblade for eaehescapement means, a'chuck communicating with each escapement means,

a screw driving bit rotatably and slidably located in each chuck. means for simultaneouslyrcciprocating all of said blades and bits, and meansfor compensating for variation in the lengths of time to drive lhe several screws.

6. A screw driving machine including a magazine for containing screws, a plurality of escapement means associated with the magazine, arvertically reciprocating, operating bladefor each escapementmeans, achuck- T communicating with each escapement means, a screw driving bita'otatnbly and slidably located incach chuck, means' for simultaneously lowering all of said blades andbits, and means for compensating for variation in the lengths, of time to drive the several screws; a a

In testimony that we claim theabove, we have hereunto subscribed our names.

GRA e. BROWN. 1 GREGORY F. McNULTY.

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