US1986458A - young - Google Patents

Description

Jan.`1, 1935. w J YOUNG 1,986,458

HEEL DOWELING MACHINE Filed Aug. 25, 1951 3 Sheets-Sheet 2 www gig

Jan. 1, 1935. W J, YOUNG 1,986,458

HEEL DOWELING MACHINE Filed Aug. 25, 1931 s sheets-sheet s f i ,f *y v `Lessinia; y LDovELINfG v William 'JQ Young?` Peabody,.Mass'.', assignor `to lW. J. l oung Machinery Company, iLynn, Mass.,

a. corporation of Massachusetts;` y f Appiin'titinn Angiist 25, 193i; `stiiinl No; 559,177 w i y i oinims. (01.144-#3'1'5 t v f` The present inventiii reiatesfto ihyartnf tief tain oniinesii-isnalv-v ienectiveiy dfi placing' strengthening"-"dowelstin woodheels of Fig.`1;` v y y v y L siichfheight andi s'lend'erres`s`to redurerreiln-` EigQS is'a plan' View enlargedof one of theh'eelV forcement. Thedovirls' commonly-used for this h'ol'ders Y L c In t d 55;,purpose are steel :pins or rods about 1/8"V in di- S'is a .sectional View" enlarged .of oneof* 5" aineter and of ailfength appropriate to` the' height the olders, suchl section being taken on line 9-9 of the heel, but they maybeofany'other suitable ofi ,.g, 5.11t 1j 1 Y y rateral andai any serviceable diameter. My like"reference Characters designate ,the same"` object is toprovide a combined niachine uniting parts` Wherever they `occur all1A the gure Vl mvltnefnnctions of `pi'einring ayiieeigto receive a 'ljiieframestructureQithemathinompes'ai 10@ v Patented Jan. c l, 1935 dovvel',` feeding dcvvels one by onelto a driving point, and driving'the' dowelfsintothhles prei With each holder successively `diierent ones of a number of Working stations. Thefrnahine 'pared ,for theirjreception in heels; all as related partsof a continuous process' and' with perform- 'afntle ofthe operatOnS of drilling and dOWel drive ing simultaneously' upon tvvo different ilieels` ap-,J` propriately placed in"the""inaclf1`ne-r` Withthis, object in view, the machine is provided` with a rotatable carrier having `afplura'ilty,of holders `adapted. to be driven stepby step; and 'to stop has a drill at one offthese stations operable to drill a hole 'for receivingfa dovvel inf aheeltenii porarilyv occupying sucht station anda dowel "dri-vf A er at another station to which heelsare `brought after beine ,dilledhwith automaticmeans for delivering dowelsfroin a magazine to the driving Vstation in position-to be forced bythe driver into a heel at thatstation. ,There is alsolan automaticfremover for'displacingthe' heels at a delivery stationtoiwhich they are' brought after having receivedV a dowel; vAfter `discharge of the heel, each holder' is broughtV toit a' `loadingstation `Where heel blanks are placedfsuccessively upon them bythe operator; i

A'specic machinefhaving-af ernbodirnent off the means above recited, for' the objectsspeciecl,

is"shown in the dravvingsfherewitlrand` describedZ 'indetail in the followingspecicatiomlior illustration ofthe princplesva'nd characteristics of the invention, but without intentt6` iiniit the"invn;`

`6 and?l are horizontal fragmentary see#` nitedf'ard Secured, and such sleeveiis rotatably portion thereon 3u; or niakingjthe bore 4of the Vhub with a driving fit for the column, and pressing it on; or in any other suitable way.

A driver actuating lever 32 is pivoted at 33 to arm 27 of the before named support and extends over the driver guide, where it is connected by a pin and'slot connection 34 with a driver bar 35 fitted to reciprocate in said guide 31. A dowel driver 36 of smaller diameter than the bar 35 is secured to the latter'and passes `through a bushing 37 mounted in the lower end of guide 31. It is of suitable diameter to fit slidingly in the dowel guide 30, and is of such length and position with respect to the stroke of driver bar 35, that it is adapted to follow the dowel placed in the latter guide and force the dowel into a heel on the carrier beneath.

. At a point 38, intermediate its length, the lever I the base 1. A spring 47 is anchored on' post 46 and constantly presses` 'arm 44 .toward the cam.

, Stud 43 serves also as the connection between the link 42 and the cam follower. Arm 44 is simply one convenient form of means for holding and guiding the cam follower in correct relation to the cam.

vCam 40 is driven by the motor 14 throughthe 'pulley 16 previously mentioned, abelt 49, pulley o'n shaft 51, pulley52 on vshaft 51, belt 53,` pulley 54, shaft 55, gear 56 secured* to shaft 55, and gear 57 in mesh with 56 and fast tol shaft 58 o n which the caml is also made fast. Preferably the pulley 54is looseon shaft 55and driving connection with the latter isqmade through a cone friction .clutch 59 which is splined to the shaft and normally pressedv against a complemental clutching partof the pulley `by a spring 60. The clutch may be disengaged at will from the pulley by an operator controlled shifter, .of well known character, engaging aA grooved hub 61 of the c1utch- VI n addition to working the driver, the rod 9 also feeds the drill endwise, operates the knockoff or discharge device, and controls the delivery of vdowels to the receiver 30.v To accomplish these vadditional purposes, a collar 63 is lapplied to thev rod and secured thereto by suitable means, suchA 'as a set screw 64. This collar carries a rigid forked arm 65, the branchesof which engage 'a grooved collar 66 Vslidable on the drill holding sleeve 22 and connected with the drill spindle so as to transmit endwise movement thereto. The collar` 63 also 'carries an arm 67 tted with-a rod 68 which yis adapted to bear on and move a finger or arm 69 which projects in its path frcma knock-01T dog' 70pivoted tothe lug 28 at 71. Thisv knock-off ydogis normally held retracted by a vspring 72. The collar 63 also carries an arm 73 which extends outward from the collar and then downward through an opening Vin the guide arm 29 carrying separated stops 74, 74, which embrace, with.V

lostmotioman arm pivoted'to the support26 at176.v y

Thefendwise travel of the drill is determined by the throw of cam 40 and is made'long enough tofeed the drill through'nearlythe entire height of the highest heel, and to raise it'sufciently to from this axis.

clear such heels when carried into and out of drilling position. The driver, however, travels at the same time by propulsion of the same cam through a greater distance, due to the fact that the arm of lever 32 (comprised between the pivots 33 and 34) which propels the driver is longer than the arm (comprised between pivots 33 and 38) to which the? actuating rod 9 is connected; thereby giving suiicient clearance for the placement of dowels in driving position by the means disclosed in my Patent No. 1,819,584, dated August 18, `1931. That is, by virtue of the motion-amplifying means for reciprocating the driver, I am enabled to propel both the drill and the driver by means of a single cam, which makes for simplicity and economy in building the machine; to make the feed stroke of the drill the shortest possible consistent with accommodating the highest heels and drilling to the required depth therein, thus avoiding `the lost motion and loss of time incident to giving the drill as long a travel as the driver; and at the same time, give the driver theV additional movement necessary to accommodate the dowel.

Dowels .pass from the magazine 7 to the receiver 30along a raceway 77, and their delivery one at a time to thereceiver is effected by a combined gate and escapement element which is shifted at the end of each driving stroke of the driver to take a dowel from the raceway, and is again shifted at the end of each up Astroke of the driver to' transfer the dowely so 4taken into the guideway onthe receiver 30. These motions are eiected by the arm 75 and the stops 74. The transfer mechanism above referred to, used in this machine, isidentical with that fully described in my Patent No. 1,819,584, dated August 18, 1931, to which reference is directed to supplement the description vherein given.

78 (Fig. 1) is a lifter platewhich reciprocates vertically in the magazine'7 for raising dowels to the magazine end of raceway 77, and 79 (Fig. 5) is a toothed knock-off wheel for displacing from the raceway any dowels which fail to enter properly vthe guiding channel thereof. These parts are essentially like corresponding parts disclosed in my said patent, and are driven by the motor 14 through shaft 55 by the following means. A

pulley 80 on shaftl 55 drives, by belt 81, a pulley 82 on shaft 83 (Fig. 2), on which are Aa band pulley 84 and a pinion 85. This pinion drives a gear 86 carrying apin 87 which travels in a slot in a lever 88, said lever being pivoted on a xed bracket 89 and pivoted to a long link rod 98 which rises toa connection with lifter 78., Pulley84 drives a belt 91 which passesaround a pulley 92 on a shaftv 93V Which carries the knock-off wheel 79.

Iltwill be noted from-the drawings, and particularly Fig. V5, that the drill, the dowel driving means, and the knock-off, are equiangularly spaced about theA axis of the central column 8, and that the drill 5 and driver`36 are equidistant The angles between these instruments may be and may correspond with three of the four stopping positions of holders carried by the rotatable heel carrier 10 the fourth position being aloading station. However, they may be spaced at smaller angles and the carrier may` be provided with'more than four holders and stopped in more than four diierent positions, if desired, inorder to give more time for loading or to permit performance of other operations lon ther heels. i

Carrier `lois-a circular table having a hub which surrounds, Vanolissplined or otherwisenonrotatablyiixedto, a sleevei95 whichts `rotatably about thecentral column-8 andrests atits lower end on1 adriver96. Saiddriver ispreferably a bevelgear which rests, andhasathrust, bearing, on the shoulder 13previously mentioned. This i gearV or driver iskcontinuously rotatedbyishaft 55 through the medium of a sprocket97 on :said shaft,\chain 98, sprocket 99iand bevel, pinion 100 on theshaft` of the `last namedsprocket and in meshwithdriver 96. Saidjdrver is `notjposi.-

r `tively connected to `thesleeve 95,: but transmits be stoppedi at theproper times.

power yieldingly thereto'sothat-the carrierfmay device is provided for so driving `the-carrier comprising, four (moreorless) shoes 101 (seeFig. 7)

i pressed individually by springsy 102 `againstya cylindrical surface-` 103 on theilowerend of sleeve 951;y Springs 102.@react `aganst adjustable babut-,l`

ment screwsloathreaded through lugs 105 `on the driver-,.wherebyqthe frictionaldriving force applied may be,regulated.` Arrestof'the carrier: at each of itsstopping'places is caused by a stop` `dog 106 (Fig. 6) cooperating withshoulders or` abutments 107 onan arresting disk or flange 108 whichisrigidlyfjoined tothe sleeve 95. `A spring 109 normally holds the stop dog against; the periphery of the arresting disk, and returns it thereto after displacement. i

Stop dog 106 is secured, keyed for instance, to

an oscillative upright' rod v110 supported in a step bearing 111 on the base and having a control arm 112 secured upon it in cooperating relation with Qu A a cam finger 113 fast on shaft 58. (see Figs. 3 and 4). This cam finger has a` beveled or inclined face 114. so arranged as to engage the side of arm 112 in passing and displace such arm far `enough to withdraw the stop dog out of the path of the abutment shoulder 107 withwhich it is then engaged, as shown by dotted lines in Fig. 6.

As soon as the cam finger passes arm 112 after its brief engagement therewith, which is of less duration than the time needed for the carrier to turn through the angle between two abutments 107, the stop dog isreturned into contact with the arresting disk, ready to block the next abutment thereof.

Heel holders 115 are mounted on the carrier 10 in such positions that, at each arrest of the carrier, one of them holds a heel in correctrelation to the drill 5, another holds a heel with its previously drilled hole in line with the driver, and the third holds a doweled heel in the path of the knock-off device. Thus with each descent of the main actuating rod'9, one heelisV drilled', a

` second receives a dowel, Vand a third one is discharged into a chute 116 which conducts it to any i 123 transverse to the pivot rod 121 and tangential to the carrier.

By these `adjustments the surface of the plate may be tilted ,to any angle necessary for bringing the desired locationfof 'the dowel within the'heel into `a vertical line.

Adjustments about the pivot 121 are made fast n by a screw 124 passing through an arcuate slot in one of the lugs 119 intoa tapped hole in the adjacent lug 120. The holder is adJusted around A friction clutch pivot123'` and supported Lby a stop screw 125 mounted `in thetable. y 'l Heels Vare positioned (correctly don the holder by-fa breast gauge 126 anda iside gauge 127, both being adjustably securednto the` holder `by clamp `tenedftothe `holder-in a similar'manner to'clamp 127, and is arranged so that springs 132 press clamp `130 `toward `127. The `supporting surface of` table -1118 ris; 4preferably formed' `with upstanding spurs 133 or is` otherwise roughened to aid the clamps in preventing `theheel from slipping off., I havefound in practice these meansare.

eifvective ,to that end, notwithstanding the considerable inclinationgivento. the holder when the` highest heels are operated upon. y

,The rotary carrier is adjustable verticallyin order to. accommodate heels of different heights,

itssplined connection with sleeve 95 permitting the motion necessary forthat purpose." Such adjustment` comprises aY cylindrical i cam 1-35,and

cam follower 136 surrounding the sleeve 95, supported on the arresting'disk 108 and on which the carrier rests. The cam is rotatable about the sleeve and the follower is withheld from rotation, and they have oomplemental helical abutting faces arranged to cause axial movement of the follower and the carrier when the cam is turned. A worm gear element 137 is associated with the cam, as an integral part thereof or otherwise, and meshes with a worm 138 on a shaft 139 to which a hand wheel 140 is connected. A bracket 141 on table 3 provides a bearing for the worm and its shaft and also supports a key member 142 by which the cam follower is restrained from rotation. The-weight of the carrier is sufcent to cause` its descent when the cam is turned in the withdrawing direction, but may be supplemented if desired byv a spring, which may be placed to surround the column 8 under compression between the carrier 10 and the under side of the support 26. Itv will be apparent from the foregoing description and the drawings that in the operation of this machine the operatrsitaskl is simply to place heels on the empty holders as they pause in the loading position, and that the operations are all automatic, effected successively on each individual heel and simultaneously on, different heels.

1. A machine for preparing articles to receive dowels and inserting dowels in such articles, comprising a drill, a dowel driver, means for carrying an article into position to be bored by said drill andfor transporting it thence to another position where the hole so prepared is in line with the driver, means for rotating the drill, means for placing a dowel in line with the driver and between it and the article, and a single cam for moving the drill and driver back and forth endwise, combined with connections whereby the driver is given a longer movement than the drill.

2. In a machine of the character set forth, an

endwise movable drill, a driver movable endwise in parallel withthe drill, an actuating element having a .Xed arm engaged with the drill, and a lever having a longer arm connected with the driver and a shorter arm connected with the actuating element wherebyto impart t the driver a longer movement than is given to the drill.

3. lA doweling machine comprising a frame having an upright tubular' column, an actuating rod contained in said column for movement endwise therein and protruding at opposite ends therefrom, means acting on the lower end of said rod for reciprocating it, a support secured to the upper end of said tubular column having an arm at onel side and a driver `guide at the other side of the column, a driverfreciprocatively mounted in said' guide, a lever pivoted to saidv arm and having an upright tubular column, an actuating rod mounted to reciprocate in said column and protruding above and below the same, a drill and a dowel driver mounted equidistant from the axis of said column, connections through which said rod moves the drill and driver, means for reciprocating the rod, a work carrier rotatable"about said column, means for rotating the work carrier, and means for adjusting the work carrier endwise of the column comprising a sleeve cam rotatable about the column, a cam follower sleeve intermediate the cam and carrier, said cam and sleeve having complemental abutting helical faces.

5. A doweling machine comprising a frame having a lever-supportingarm, a lever pivoted 'to said arm, a dowel driver connected with said lever and guided to move in a prescribed path, a drill guided for feeding movementl in a path parallel to that of the driver, means for carrying work pieces in turn to the vdrill and to the dowel driver, a cam, and means whereby said cam drives both the drill and driver in the same direction at the same time, said means including a rod connected with said lever at 'a point nearer to the pivot of the lever than the connection of the lever with the driver, and a rigid propelling arm extending from said rod to the drill, whereby the cam causes a longer movement to be given to vthe driver than to the drill.

WILLIAM 'J YOUNG.

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