US2057290A

US2057290A - Scouring machine

Info

Publication number: US2057290A
Application number: US741544A
Authority: US
Inventors: Walter W Bradbury
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1934-08-27
Filing date: 1934-08-27
Publication date: 1936-10-13
Anticipated expiration: 1953-10-13

Description

SCOURING MACHINE 6 Sheets-Sheet 2 Filed Aug. 27, 1934 A oct, 13, "1936. w, w BRADBURY 2,057,290

scoURING-MACHINE Filed Aug. 27, 1934 6 Sheets-Sheet 3 j F1 .il 155 l? WEA/TUR,

www. @MAQ hm w i W. W. BRADBURY l SCQURING MACHINE `ocr. `13,1936. K

`Filed Aug. 27, `1954 e sheetsfsheet 4 rf@ @36 f MEA/TUR Patented 13,

i i, UNITED STAITIEIJS` LPATENTu OFFICE y i, s `2",05"1,2910 l l i Y 0 scoUmNG MAcHrNE l `waltervw. Bradbury, St. Louis, Mo., assignor to `'United Shoe Machinery Corporation,Pate1-son, y A vN. J., acorporationof New Jersey l v `l i .Application-ingest 27, 1934, seria; No. 741,544

Thisinventionrelates to "heel scouring ma.- chines.

fInthe,manufatt-,ureorwood heis mesme arid rear surfaces are `cut in'two operations, the cuts extending' from the' breast surface to the center of the `baclein order not to cut against the grain of f thewood. Thistalways leaves a ine line at the'center of the back. For this reason, and occasionally others, it is necessary to scour Vthe heel `before itis covered, and' the scouring is` preferably extended to the. entire side and rear surfaces ofthe heel.

Itis an object ofthe presentinvention to proi vide a machine fcrdoing this work.` Such a machine mustbefable to turn the heel` past a profiled abrasivemember while reproducing, 'to

` a satisfactory degree, the somewhatcomplicated l illustrated automaticdmachine which constitutes at preferred embodiment ofV theiinvention is` provided with an organization of scouring means and a work support arranged to pass a work l piece over the scouring means, the work sup- 1 "sport, when inoperative, beingheld in ailoading position remote from the scouring" means, and an "operator-controlledmeans for terminating the condition just-described and actuating the work piece relatively tothe scouringmeans.` y back of theheelfapproaches the scouring means the heel is tipped in its own `Vertical longitudinal As the plane. "This tipping movement,` camscontrolled,

is also utilized in moving the heel support to the "loading position,kand` means is provided, in -ac cordance with "a feature fof thefinvention, `for inhibiting the action ofthe cam control, as the Jnewly inserted heel is moved and turned toward l the `scouring means,`at the precise point where scouring; v y

theheel isproperly tilted'for the beginning of the scouring at `the `breast corner, the control being resumedlater inthe operation whenl the rear portion of the heeltisbeing treated: a reverse conditionV of `things obtains at the endfof the `Since it is not necessary, in scouring,toltreat the `two sides ofthe heel in thefsame relation to the grain, it is feasibletoF simplify` the ma` chine and to save timel byfrotating the heel con-` tinuously `in the same direction past the scouring tool-` To 'facilitate this the invention provides ank improved clamping mechanism which does not detail `which carries an index mark.

partake of the rotation-of the heel norjof the above-mentioned tipping movement of the' heel, and thereby avoids interference with the scour-` ingmeans'. This preferably comprises a resilient member floating in its support `so as to `follow 5 these peculiar movements ofthe heelA Without sacricing its eiiiciency as a clamp. `'Ihese and other features of the invention comprising certain combination and arrangements of,y parts Awill beapparent from the Afollowing `de` l0` scription of a preferred embodiment of the invention shownin the drawings, in which Fig. 1 is a perspective view;

Fig. 2 is a side elevation; ,i Fig. 3 is a front elevation ofthe upper partici l5 themachine;` f Fig. 4 is a crossl-section of the clamping mechanism at the instant it` begins to apply pressure toi the heel;` 1 Fig. 5 isa plan view of a. detail; Fig. 61s

l i 20 a front elevational cross-section of a Fig. '7 vis a front-rear cross-section of the parts showninFigiS;A`V`

' Fig. 8 isa plan view4 of thesand belt; and l Fig. 9 is a cross-section of the clamping mech` anism as it appearsduring thesanding operation The `main frame Il)` carries a block I 2 which has bolted to its sides apair of lears, IQQLEach 30 of the ears I 4 has a guideslot having vertical faces i6, SquareV1 blocks I 8 are `verti`ca1ly""adl` justable in'these guide slots by means of screws` 1 20. The blocks I8 have

arms

22, 24,"rejspectively, the former of .which is arrangedto coact with anr 35 adjusting screw 26 and nut 28, and thejlatter of -Theiblocks I8` have mounted in them `coaxial stub shafts 30 (Fig. 6) on which isk pivotally hung a rocking frame 32 having 4anear`134` to`which 40` the upper end of the screw 26 is pivotally `at` tached. Thus the adjustment of the nut`28 angularly adjusts the frame 32 about the' axis-of the shafts 30, theextent of adjustment-being v read ona scale bythe index arm 24 (Figs. 1 and 45 v3); 'The `parts are held steady by a 'clampnut` 35 which clamps theframe 32 to the right-hand` b1o`ck`|8.- p The frame `32 has guideways 36 extending in a5 fore-land-aft direction, roughly horizontallyyo though this orientation is affectedby theangu-` laruadjustment above described. lIfhe guideways 36` embrace sliding ribs 3B onfaframe 40`,`which slides freely inthe guideways`36 `and is held resiliently in its rearmost position by springs 42, 51,5

whose rear ends are attached to the main frame |0. The position of the frame 40 is controlled by a roller 4| mounted on the frame 32 and coacting with a cam described later. The frame 40 has a pair of vertical guideways 44 (Fig. 6) in which is freely vertically slidable a frame 46, whose vertical position is controlled by a roller 48 mounted on the frame 40 and coacting with a cam which will be later described.

The frame 46 carries a gear box 50at itslower end, in which is mounted, rotatably but not slidably, a vertical jack shaft 52 having a bearing also at the upper end of the frame 46. The shaft 52 carries a cam 54 which rides on the roller 48 and thus controls the vertical position of the frame 46, shaft 52 and all that they carry. The cam 54 (Fig. 7) is, pivotally carried on pins 56 in a fixed collar 51 mounted on the shaft 52, and is angularly adjustable by means of screws 58. The shaft 52 carries at its upper end a cam collar or form 60 coacting with the roller 4| to control the in-and-out position of the frame 40 and all the elements that it carries.

The shaft 52 is driven by a worm and gear shown in Fig` 7, the worm shaft 62 being splined in its worm, and having two universal joints (Fig. 1) connecting it to the drive pulley 64. This structure permits free driving of the worm and shaft 52 in all positions of the shaft. which, as seen, is vertically and horizontally movable, and also angularly adjustable about the axis of the shafts 30. A one-revolution clutch 66 (Fig. 3) is available to connect the shaft 52 to the worm wheel.

'I'he heel handling mechanism or jack is mounted on the upper end of the jack shaft 52. This shaft has a plate member 68 bolted to its upper end. This member 68 has an arc-shaped slot 10, the center of which is located approximately at the top-lift end of a heel blank 1| in the jack. The base of the jack itself is a little carriage 12 straddling the member 68 and having rollers 19, shown in dotted lines in Fig. 7, traveling in the arc-shaped slot 10. This travel tilts the heel blank 1| about a transverse axis passing near its top-lift end, and is controlled by a lever 16` (Figs. 3 and 7) pivoted at 18 on the member 68, and having a slotted upper end engaging a bolt 80 passing through the straddling arms of the jack. The lever 16 is swung by 'a link 82 pivotedto it and to one arml of a crank lever 84 which is pivoted at 86 on the member 68 and is connected by a spring 81 to the member 68. This spring tends to force the carriage 12 to the left (Fig. 7) and tilts the heel 1| forward. The other arm of the crank lever has a roller 88 which during most of the sanding operation runs on a cam 90 encircling the shaft 52. The cam 90 is pivotally and adjustably (by the screwV a) mounted in ears 82 mounted on the top plate of the frame 46. 'Ihe cam 80 thus limits movement of the carriage 12 to the' left (Fig. 7). At times, also, movement of the carriage 12 to the left is limited by a screw 9|l mounted in the link 82, and coming in contact' with the lever 16. This will be described later. The upper horizontal surface of the carriage 12 carries a slide 94 which is adjustable lengthwise of the carriage by a screw 96,l and has mounted on its upper surface a toothed plate 68. Its rear edge is turned up at |00 to form a gage for the heel 1| which sits with its attaching face on the plate 98 and with its lip or breast edge against the gage |00.

The rear end of the plate 98 is slotted (Fig. 3) to permit entering of an ejector arm |02 which is pivotally mounted at |04 on the side of thc carriage 12. The ejector has an offset hub |06 acting as a journal for that purpose and is resiliently drawn toward the heel 1| by a spring |08 connected to the carriage 12. An arm ||0 having a roller ||2 at its lower end projects downward from the hub |06 to operate the-ejector |02. With the machine in the` loading position, this roller ||2 contacts with the cam ||6 (Fig. 5) at a portion sufficiently thick to force the arm ||0 back against the tension of the spring |08 and to withdraw the ejector |02, thus permitting the untreated heel to be inserted in the machine. As the jack rotates clockwise after loading and clamping the heel the roller ||2 is withdrawn from contact withthe cam ||8 by the backward motion of the carriage 12, thus allowing the ejector |02 to come to rest against the heel 1|. After the sanding has been completed and the clamp released the tension of the spring |08 will eject the heel.

The cam ||6 may be provided with a tooth ||4 to provide for an actual ejecting blow. In such case, after the sanding has been completed, the roll ||2 comes around against the tooth ||4 and is forced back in a `direction parallel to the axis of symmetry of the form 60 which moves it nearer to the axis of the shaft 52 (though not directly toward the shaft) and allows it to pass over the tooth |I4. Meanwhile, the ejector arm |02 has been drawn away from the heel 1I against the tension of its spring |08 and as the roll ||2 drops over the tooth ||4 on to the thin part ||8 of the cam ||6 it snaps against the heel and ejects it, the clamp having been previously released, as will be seen.

A short arcuate cam |20 is mounted outside the cam ||6 with its ends near the ends of the cam 90. -This cam |20 is taller than the cam ||6 and coacts with the roll 88 at its central portion to hold the jack in loading \position. The cam |20,"as shown, is not adiustable. It has beenfouncl that the upper edge of the cam ||6, if properly shaped, will fulfill the function of the cam |20. The choice between the two constructions is largely a matter of manufacturing expense.

The clamping mechanism will now be described. The shaft 52 carries a cam |22 which cooperates with a roll on the end of a lever |24 pivoted at |26 on the frame 46. The other end of the lever 24 is pivotally connected to the lower end of a rod |28 which slidesvertically in a boss |30 on the frame 46. A spring |32 between the lower side of the boss |30 and a collar on the rod |28 normally holdsthe rod down and is strong enough to effect the desired clamping pressure on the heel 1|. through another boss |34 mounted on the frame 46, and has an arm |36 at its upper end carrying the pressure mechanism, which is shown in detail The rod |28 runs up "60 in Fig. 4. The arm |36 carries a casing |38 having a cylindrical hole |40 in its bottom and a conical hole |42 in its top. A clamping member, shown as a screw |44, extends through both those holes and has a toothed dog |46 on a ball and socket joint at its lower end to contact withA the top-lift end of the heel 1| A nut |48 on the screw |44 has a hub |50 projecting loosely through the hole l|40 and has a flange |52 acting as the lower member of a ball race. 'I'he upper member |54 of the Aball race is of cup-shaped formation with a hole in its bottom to loosely t 2,057,290 accommodate an upper hubon the nut |48,`and

its vertical; sides slidefreely in the casing |38.

A spring |58, lwhich is weaker than the spring |32, is confined between the memberv |54 and the top of the casing |38.`

A cone-shaped nut |58 is mounted on the screw `|44 and projects through Iand ilts thehole |42,

, and above the nut "|58 is adam nut |80.A An

flat against the bottomrof the casing '|38, thus centering the dog |48 again. 1

The scouring mechanism is mounted` on the member I2 and comprises a sand belt |84 running on two horizontal pulleys |88 which are preferably motor driven and provided with an appropriate belt tightening device |88. Opposite carrying a normally fixed but rotatively-adjustable .brush |12. The stud is adjustable towardand from the jack by Va slide |14 and screw |18, and the brush |12 is polygonal in form, as shown in Fig. .8, with its different vertical faces trimmed to different heel profiles. In any given situation that side of the brush is turned toward the` jack which most nearly corresponds with the profile of the heel then being sanded and the brush yields enough to permit the sand belt to contact properly with the sides and back of the heel. l

i In using the machine the operator selects that side of the brush |12 which best fits the contour of the heel to be sanded and turns that side of the brush toward the sand `belt4 |84. He will thenplace an unsanded heel `on the plate 08 and The *camw |22l drops the dog |48 on the heel, as above described; asthe jack begins toturn clockwise. This rstmovement brings the left-hand breast edge (as seen by the operator) L of the heel toward the sand belt. It is `essential that the heel be in just the right position, as'regards orientation in its own longitudinal vertical plane,"at the instant the sanding begins. If itis tilted forwardly'substantially (in the direction in which its breast faces) on the top-lift corners by the machine .shown in United Statesv Letters Patent No. `1,951,468, granted March 20, 1934, onthe application of L. J. Bazzoni. `A proper control of the tilt of the breast to the back ofthe heel.

heel in the instant machine, at the time 'the heel first encounters thesand belt, enables tile machine to follow theV spooling previously cut on the heel. This is accomplished by adjusting the screw 9| so `as to stop the leftward movement (Fig` V7) and consequent forward tipping of the heel at just the right point as it approaches the sand `belt and the top-lift corner is thus turned on the belt just the proper amount before the side of the heel comes to the belt.

Directly after the left-hand breast edge (as seen by the operator in Fig. 7) has been treated by the sand belt, the heel being then turned substantially 90 from the position shown in Fig. '1, the roll 88 rides up on the cam 00 which then controls the position ofthe carriage 12 and the tilt of the heeluntil it-has turned about '180 into a position the reverse of that described above, and the other breast edge locality of the heel is treated in the same'way as thatfirst described.` The heel isV then 'ejected in the manner above described andthe machinestops.

In order to understandthe movements of the heel while being sanded it is necessary to remember that, while the same profile gage will fit at all points around the sides and back of a heel, it fits at different points heightwise of the heel as it is moved around the heel: that is, a certain point on the profile gage willcontact with the heel at points farther and farther from the top-lift end as the gage moves from the t The 'requisite vertical relative movements of theheel and sand belt are secured by the adjustable cam 54 which lifts and lowers the jack shaft 82. The proper deformability of the brush |12 taking care ofu small inaccuracies.

The jointedconstruction of lthe shaft 82 permits free movement of the jack without the disturbance of the drive.l

Havingdescribed my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

l. A machine for scouring heels and like articles'co'mprising a scouring tool, a work support, a frame in which said work support is rotatably mounted, sa'id frame being mounted for movement toward and from said scouring tool, yieldable 'means'for urging said work support toward said tool to cause a work piece to engage the tool, means for holding said frame in a position removed from said tool to facilitate loading and unloading of said work support, operatorcontrolled means zfor terminating the action of said holding means to enable said yi'cldable means to move said frame toward said tool to bring a heel blank in said work support into engagement with said tool at a breast corner of said heel blank, and means actuated by said operator-controlled means -for turning said work support to carry the heel blank over the scourback to the other breast corner, and for then moving said frame back to the starting position and stopping the turning oi' the work support at the end of a single complete revolution thereof. t

2. A machine for scouring heels comprising a normally flat flexible abrasive member, a brush shaped approximately to the contour of a work `ing tool from the said breast corner around its piece backing said abrasive member, a work support, a frame in which the work support is rotatably mounted, and mechanism for moving the work support toward and from the abrasive member and for moving it substantially parallel to the abrasive member as the rotation of the work support proceeds, said mechanism operating automatically to hold the work support at a. distance from the abrasive member when inv loading position and to bring it into operative position after loading.

3. A machine for scouring heels comprising a normally flat flexible abrasive-member, a brush shaped approximately to the contour of a work piece backing said abrasive member, a work support, a frame in which the work support is rotatably mounted, and mechanism for moving the work support toward and from the abrasive member and for moving it substantially parallel to the abrasive member and for tilting it progressively as the rotation of the work support proceeds, said mechanism operating automatically to hold the Work support at a distance from the abrasive member when in loading position and to bring it into operative position after loading.

4. A machine for scouring heels comprising a normally at flexible abrasive member, a resilient contoured backing member for said abrasive member, a work support, a frame in which the work support is rotatably mounted, and mechanism for moving the work support toward and from the abrasive member and for tilting it v progressively as the rotation of the work support proceeds, said mechanism operating automatically to hold the work support at a distance from the abrasive member when in loading position and to bring it into operative position after loading.

5. A machine for scouring heels comprising a normally fiat flexible abrasive member, a resilient contoured backing member for said abrasive member, a work support, a frame in which the work support is rotatably mounted, and camcontrolled slide mechanism for moving the work support translationally relatively to the abrasive ember and for tilting it progressively in the longitudinal vertical plane of a heel therein as the treatment of the heel proceeds, said mechanism operating automatically to hold the Work support at a distance from the abrasive member when in loading position and to bring it into operative position after loading.

6. A machine for scouring heels comprising a normally at ilexible abrasive member, a resilient contoured backing member for said abrasive member, a work support, a frame in which the work support is rotatably mounted, a slide for moving the work support toward and from the abrasive member, a second slide for moving the work support parallel to the abrasive member, cams for controlling the slides, automatic means for titlting the work support progressively as the treatment of a heel thereon proceeds, and means for rotating the work support continuously through a complete revolution to carry a heel thereon past the abrasive member.

7. In a machine for scouring heels, a tool having substantially the contour of a work piece, a rotatable jack shaft, a-work support on the jack shaft, means for tilting said work support during the rotation of the shaft in a plane parallel to the shaft comprising an arcuately slotted guide member and a cam, a frame carrying the jack shaft and arranged for cam-controlled movements toward and from the tool and across the tool during the rotation of the jack shaft, a cam-controlled clamping member for holding a work piece-against the work support, a cam-controlled kick-out member oper- 6 ating to remove the work piece when the clamp-` lng member has been released, and means for rotating the jack shaft to move a work piece on the work holder past the tool.

8. In a heel making machine, a heel holding jack, a tool, means for rotating the jack past the tool in order to treat the surface of a heel therein, means for tilting the heel in the jack during the rotation, a cam arranged to control the tilting movement during the major part of the time that the heel is in contact with the tool, a second cam for controlling the tilting movement during the time that the heel is not in contact with the tool, and means for inhibiting the action of the last-named cam at the beginning and end of the treatment of a heel by the tool.

9. In a heel making machine, a tool, a jack arranged .to-carry a heel past the tool, resilient means for tilting the jack as it moves the heel over the tool, a cam for opposing and controlling the resilient tilting means during the greater part of the time the heel is in contact with the tool, a cam roll and a lever cooperating with the cam and jack for the purpose just described, a second cam cooperating with the cam roll during the remainder of the operative cycle of the machine, andan adjustable screw for preventing the falling of the roll on the lower portions of the second cam to inhibit the action of the lower portions of this cam.

10. In a heel scouring machine, a sand belt, a backing brush having a heel profile for the said belt, a jack shaft arranged to move toward and from, and parallel to the surface of, the sand belt, a cam and cooperating means therefor one of which is located on the jack shaft for controlling the said two movements, a heel clamping device, a cam and cooperating means therefor one of which is located on the jack shaft for controlling the clamping device, and means for rotating the jack shaft to carry a heel past the lsand belt.

11. In a heel making machine, a tool, a jack comprising a member arranged to support a heel and a clamping member arranged to press the heel against the supporting member, means for rotating the heel around its vertical axis relatively to the tool and to the clamping member, and slides for movin'g the jack toward and from, and across, the tool.

12. In a heel making machine, a tool, a jack comprising a member arranged to support a heel and a clamping member arranged to press the heel against the supporting member, and means for rotating the heel around its vertical axis and for simultaneously tilting the heel, relatively to the tool and the clamping member.

13. In a heel making machine, a tool, a jack comprising a member arranged to support a heel and a clamping member arranged to press the heel againstvthe supporting member, means for rotating the heel around its vertical axis past the tool, means for tilting the heel in a plane vertical and longitudinal of the heel, and means for translating the heel heightwise and laterally of the heel, while rotation is taking place, the clamping member having the said translational movements, but not having the others.

14. In a heel scouring machine, a scouring u aosmoo tool, means arranged to support and to rotate a heel about its vertical axis relatively to the scouring tool, and to tilt it forwardly and backwardly during the rotation, and a clamping mechanism comprising a supportwhich does not partake of the movements mentioned and a clamping member resiliently oating on said support and contacting with the heel to hold it against the supporting means.

15. In a heel scouring machine, a. scouring tool, means arranged to support and to rotate a heel about its vertical axis relatively to the scouring tool, and to tilt it forwardly and backwardly during` the rotation, and a clamping` mechanism mounted independently of the heel rotating and tilting means arranged to press the heel toward the heel support and arranged to resiliently follow the movements of the heel due to the action of the rotating and tilting means.

16. In a heel treating machine, a tool, a Work support, means for translating, rotating and tilting the work support relatively to the tool, and a. clamping mechanism for holding a heel on the work support'comprising a supporting member and a clampingl member resiliently supported thereby and arranged to oat during such sup-` port in order to follow movements of a heel on the heel support. t

17. In a heel treating machine, a tool, a work support, means for translating, rotating and tilting the work support relatively to the tool, and a clamping mechanism for holding a heel on the work support comprising a casing, a resiliently supported member in the casing, and a clamping member supported by the resiliently supported member and having freedom of movement in a direction transverse to the direction of resilient support to enable the clamping member to follow movements of a heel on the. heel support.

18. lin a. heel treating machine, a tool, a work support, means for translating, rotating and `tilting the work support relatively to the tool,

member to follow movements of a heel on the heel support.

19. In a heel treating machine, a tool, a work support, means for translating, rotating and tilting the Work support relatively to the tool, a clamping mechanism for holding a heel on the Work support comprising a supporting member and a clamping member resiliently supported thereby and arranged to iloat during such support in order to follow movements of a heel on the heel support, and a cam for controlling movement of the supporting member to bring the clamping member into engagement with the heel.

20. In a heel scouring machine, an abrasive sheet, a resilient, profiled backing member therefor, a slide moving toward andfrom the tool, a second slide moving transversely to the first-named slide, one of these slides being mounted on the other and carrying a jack shaft, cams for controlling the slides, a work support tiltably mounted on the jack shaft, a cam for controlling the tilting movement of the Work support, and means for rotating the jack shaft in any position of the slides.

21. In a heel scouring machine, an abrasive sheet, a resilient, proled backing member therefor, a slide moving toward and from the tool, a second slide moving transversely to the iirst-named slide, one of these slides being mounted on the other and carrying a jack shaft, cams mounted on the jack shaft for controlling the slides, a work support tiltably mounted on the jack shaft, a cam for controlling the tilting `movement oi the work support, and means for rotating the Jack shaft in any position of the slides.

22. In a heel scouring machine, an abrasive sheet, a resilient, profiled backing member therefor, a slide moving toward and from thev tool, a second slide moving transversely to the first-named slide, one of these slides being mounted on the other and carrying a jack shaft, cams for controlling the slides, a work support tiltably mounted on the jack shaft, a cam mounted on that slide which carries the jack shaft for controlling the tilting movement of the work support, and means for rotating the jack shaft in any position of the slides.

WALTER W. BRADBURY.