US2186478A - Bowl handling mechanism for mixing machines - Google Patents

Description

Jan. 9, 1940; w. F. DEHUFF I BOWL HANDLING MECHANISM FOR MIXING MACHINES Filed July 10, 1936 3 Sheets-Sheet l FIG.I

INVENTOR haw; FDQW 7 ATTORNEY Jan. 9, 1940.

w. F. DEHUFF BOWL HANDLING MECHANISM FOR MIXING MACHINES Filed July 10, 1936 3 Sheets-Shet' 2 F'IG.2

FIG. IA

INVENTOR 13 a2 a0 a] 2/ 22 mfr'g fi fi W5. ATTORNEY Jan. 9,1940. W.F. DEHUFF 2,186,478

BOWL HANDLING MECHANISM FOR MIXING MACHINES Filed July 10, 1936 4 3 Sheets-Sheet 3 FIG. 3

44 012 FIG. 4 v

M 1"; !"E I 42 24 INVENTOR ATTO R N EY I Patented Jan.

' Bowr. YHANDIJNGIMECHAYNISM FOR. I MIXING MACHINES g was; F. nstumslen Rat, Pa, sssijgns -ss;

corporation oif'New Jersey I .American M-achine & Foundry Company, a

f ppnsatibn Ju1y 10,193j,.. s sia1"NoQ90,059 16 claim (or. zit-ll) This invention relates .to bowlhandling mechanism; and has special reference to apparatus in which; bowls or similar vessels may be easily handled, regardless of size, both at the mixing "5: machine, the emptying station'andin the tra'nsfer to. and from these points;

' The presentdevelopment of vertical type mix- 'e'rs has brought into use'larger andalargerbowls orxves'sels for. handling largerbatches and mixes.

; While in thehandling of smaller containers some difiiculty hasbeen experienced, especially where man power has been'depended upon, it is apparent-.-that with larger sizes 'of bowls the difiiculty I isgreatly increased and amounts to quite-a prob lem. The size of theqbowls andtheir weight,

either'empty or filled makes the provision of mechanical 'means necessary for their efficient and satisfactory use For easeofhandling' and general expediency,

itis also. important that all of the mixed batch be removed fromthe bowl as awhole, and-for that reason it is desirable to provide'mechanism" for'lifting a bowl-to a point at which it can betilted so thatsubstantially all of the contents can ,5 be removed atone-time. I

It is an object of this inventio'n to .provi de bowl. handling mechanism which will make possible v rapid and easy handling of bowls containing mixed batches of dough, cake and like products 39-, orother containers regardless of 'thesize of the vessel.

I'It is an additional'object to'provide a noveltype of bowl, especiallyadapted foruse with a bowl handling device of the-type disclosed herein i'n 3 which meansarei'providedfor locatingand tilting said bowl. I I

It is an additional object to provide a mixing bowl havlngatiltingmedium -carried thereon which makes said bowl easier to manipulate than 40, bowls heretoforetknown,andespecially with respect to large bowls. I I II I I It is a further object to provide means for han dling bowls in which means are provided forelevating bowls to an. elevation'where they may be 45., moved to contents. discharging position.

It is a furtheriobjectfto furnish. aidevice for handling bowls or like containers in which an ele-( I vating mechanismraises and. lowers a, bowl to and from'discharging position, and means are provided for limiting the movement of, the elevator at one-orboth positions;

An added object is .the provision ofmechanism.

forstopping,over-run-of the elevating elements of the bowl; liftingstructure Lthereby I preventing 55. damage to, said structure.

. beneath sai'delevato-nf With these and other objects not; specifically ssue-0am inthe claims hereunto append-ed.

'. the bowl in the down? position;

. edin; the bearing it of the bowl'elevator or, saddle ll, by means of a flanged portion 58 engages A further object 'is' to furnish an e1evator.; hav-' ing bowl seating and positioning members ,for in.-

suringl pos'itive contact of said bowlduringits move iifint to emptying position, 1 II i .The invention also includesa transfer-member 5 I f having a bowl positioning seat wherein a bowl I may betraI S e ifed to a contents "removing loca-1 tion, tilted; and the contents therein removeds The invention also, consists in a transfer-device.

cooperating withthe bowl-handlingelevator for 10 I positioning bowl thereon after themixing oper- In the accompanying drawings: I

"1 I, lis a front View View of the-bowl handling machine; showingthe bowlin the up? position Fig, 1A is -a detail view- 0f the same showing Fig; 2 is a side View of the machine I "Fig. 2Ais an enlarged 'sectional'detail View of the floating nutconstructiomr Fig. 3-is a side viewof a mixing machine-show ing the bowlin up" position; and I Fig. ,4 is a detail. view of the .bowllocking -mean's. I I

Reierring to the drawings, the base -8 'of {the machinezis. equipped with slottedprojections: 9;.

which receive and supportthe upright frame' IU-L Amotor'lfi, suitably attached to .the frame n3 I .by means of the pinion iidrives a gear. l 3 mountedonthelower endof ai spindle l4. 7 Spindle l4 engaging a floating nut" l5, Fig; 2A, loosely mount-'-.

the bottom of bearing i5 therebyliiting the elevator." Elevator H is provided' with rollers I9,

i 1A and 2, which engage in the vertical tracks Ellof ,frameQ-lil'thereby guiding said elevator v duringits "up andfolowntravel, The horizontal or base part 2i, of elevator ll supports. a pair of I shafts-":2 carrying rollers 23 which are preferej ably flanged to engage the tilting band or track '28'Iwhich pextly 'surroundsmthe mixing bowl-.25, and'act as guides. as the bowl is being tiltede This band gn'iay be formed integrally'withthe I :bowl, or, attached thereto in the manner shown.

The truck on whichthe mixing bowliis transsported consists of a carriage 30 having amiddle I connecting portion BI, and rollers 32'carried by 9" OCH swivels 33 attached to the four corners of the.

carriage. Asshown in Figs. 1A and 2, the conneotin'g part of the carriage, preferably, is so arranged that it can be slid beneath elevator l'l when a filled bowl is moved to position to be elevated and emptied. The bowl carrying truck is so constructed that it can be moved between and into engagementwith the legs of thebase 8, and therebybe located in fixed position by said legs against movement during all the time the bowl is handled by the elevator 2i. It is to be noted that lugs 34 are provided both for the purpose of serving as bearings for shafts 35 which carry rollers 33 engaging the tilting band of the bowl, and also'to act as positioning or locating members to prevent a bowl, as it is lowered in the bracket of the mixing machine for discharge therefrom onto the truck from upsetting and spilling its contents. By means of these lugs which are spaced near the band when the bowl is located on the truck,- and by reason of their beveled faces (see Fig. 2), a bowl may be consideredsecure from overturning during its transfer to an elevator.

tending arms 34, in which the mechanism for rotating member 5%! is supported for operation in a housing integral with the head, and located midway between arms 34 which support guide rods Siidescribed further hereinafter.

, Suitable gearing (not shown) enclosed ina housing integral with one of the arms 43 of head G2, is operated by a hand wheel 44 to rotate.

screws 45 which are threaded into the bracket 46 provided with hubs ll, mounted to slide on guide rods. 48 extending vertically upward from the base M3 and suitably secured parallel to each other, to the arms-d3.

While different devices may be employed to hold the bowl in mixing position, in the embodiment shown a bracket 55 is provided with an internal flange (not shown) adapted to engage a rib 49 suitably formedon or secured to the periphery oithe mixing. bowl 25, for the purpose of supporting and raising lowering said bowl relative to the beater 50 which is detachably secured to the beater spindle 5! by a coupling 52 which may be of the type disclosed in my U. S. Patent 1,792,363 issued February 10, Obviously, the bowl could be supported by trunnions or other like supporting means.

Upon the completion of the mixing operation the bowl 25 is lowered until the tilting band 24 rests on the rollers 36 of the truck, the beater then being detached from the spindle permitting the removal of the bowl and truck. During the mixing operation the bowl is held from turning by means, of the engagement of band 24 with a locking device which in the embodiment shown is a slot dtprovided in the bracket 45, illustrated in Fig. 4.

The truck and bowl are then transported to the bowl handling machine, the truck moving relative to the elevator ll which is then in its down position so. that the elevator is located beneath tions 9.

the bowl, as illustrated in Figs. 1A and 2. When the elevator starts to ascend in order to raise the' bowl to discharge position through rotation of the spindle M, it is seen that the rollers 23 on elevator l'l will engage the tilting band 24 and thereby lift'the same from rollers 36 of the truck.

Iii-order to tilt the bowl at the discharge position and remove the contents therefrom, the attendant manually'moves .a member .54 towards the bowl so that a tiiting device, such as a hook 55, mounted on the member 54 is'located to engage a cooperating element shown here as a stud 56 carried by the bowl. Through this arrange- .ment after engagement of the hook with the right position, the hook is disengaged from the.

stud 5G, memberfii. swings outward by gravity, and stops against a. strap 58 attached to the base 3 of the machine. In. approaching its lowermost position, the elevator .l.'| again transfers the tilt-.

ing band 24 of bowl 25 onto the rollers 36 of the truck, and'continues to descend until stop screws Fig. 1A, carried byangular brackets 6| and 52. attached to, said elevator engage the projec- In this manner, the elevator always returns to a positive stopping position. Bracket t2 supports-screws 63 which carry an adjustably mounted trip piece engaging a roller 65 attached to a pivotally mounted arm 65 of a limit switchii'lgand when arm 66 is actuated by this engagement ittrips the limit switch, shutting ofi the power tomotor H and thereby stops the rotation of spindle, l4. Due to the fact that a certain periodof time ,elapses before the motor stops afterjtrippingof the. switch, a floating nut construction is provided which takes up the overrun of spindle M, thereby eliminating the possibility of damaging the machine. This floating nut l5, Fig. 2A, after the saddle has reached its lowermost position, due to the over-run ,of the motor and spindle I4, will travel freely in the bearing [6 of elevator l1 until the rotation of the spindlestops'the nut then being in a position 18 as indicated by dotted lines. When the machine is set in motion to lift the next bowl,

the nut it will travel freely until reaching the bottom of bearing it, the engagement of which will again lift the elevator and bowl.

A limit switch 68, Fig. 1, of the same type as switch Bl, is provided at the upper part of frame iii and serves to stopthe motor when the 'bowl has. reached its highest position, the stopping of the motor being accomplished by means of the engagement of trip piece 64. with roller 65.

While one embodiment of the invention has been shown and described, it is to be understood that various changes may be made in the structural details of the device without departing from thespirit. and scope of the invention as 'set forth in the appended claims.

side portions thereof, at right angles to the rim okrotative positions and urged by a gravitational bias to an upright position, whether empty or of said. bowl, said member constituting a tilting device on which the bowl'is adapted to be supported freely for rotation. froma normally vertical mixing position to a'horizontal discharge position, the track being so disposed that the.

bowl is stable in its various rotative positions,

when loaded and empty.

2. A portable mixing vessel for verticalmixing machines, having a rounded bottom portion and a cylindrical body portion extending upward therefrom, means carried by said vessel for supporting it in mixing position with respect to a mixing machine, an arcuate track formed as a unitary structure with saidvessel being located about the bottom portion thereof, said track providing 'means whereby said vessel'may be sup,- ported freely'for tiltingit to a position at which its contents may be removed, the track'being so disposed that the vessel is stable in its various loaded.

3. A mixing bowl for vertical mixing machines having a spheroidal bottom mixing portion, with a cylindrical body portion extending upward therefrom, means carried by said bowl for maintaining it in mixing position, and a band extending about the bottom and up the side portions thereof at right angles to the rim and forming a :tilting device on whichsaid bowl is moved 'to discharge its contents, the band being so disposed that the vessel is stable in its various rotative positions, having a gravitational bias to an upright position, whether loaded or empty.

4. A mixing bowl for vertical mixingmachines having a rounded bottom mixing portion and a discharge lip adjacent "the rim thereof, meansv carried by said bowl for supporting it in upright mixing position, and means carried-by said bowl for tilting the same to discharge its contents, said means comprising a band member extending medially around the curved bottom and side nportions at right angles to the rim thereof, and

extending towards said discharge lip beyond its point of intersection with a diameter of the bowl which passes through the center of gravity thereof, said member being so disposed-that when the bowl is tilted rotatively. upon said member to a position at which its contents may be removed, the bowl will be engaged with any suitable underlying support exclusively by means of that portion of said'band which extends from near said lip toward said point of intersection with said diameter.

5. A mixing bowl for vertical mixing machines having a rounded bottom mixing portion, and a cylindrical body portion extending upward there from, and a discharge lip adjacent the rim thereof, means carried by said bowl for supporting it in uprigh'tjmixing position.,comprising a metal band secured circiunferentially around the side walls, a broad metal band secured to said first named band and extending around the medial portion of said curved bottom to a point beyond.

said circumferential band on the other 'side of the bowl, and being secured to the outer wall of the bowl. at a regionfbetween said circumferential band and said lip, and means carried by said bowl for tilting the same to discharge its contents, said means comprising an element located on said bowl adjacent said rim for rocking said bowl on-said mixing portion, said element being accessible, between said lipand said last named band, for ready attachment and detachment of a latch for tilting the bowl.

6. A bowl handling mechanism for a vertical mixing machine, comprising a base, frame members rising from said base and forming guides; a horizontally'disp-osed elevator lift, means on; said elevatorlift cooperating with said guides to position thelift for lifting movement, spaced supports on said elevator lift forminga seat for handling amixing bowl provided with a tilting device constitutinga part thereolflmeans for re-, movably positioning said bowl on said seatfor rotation on said device, and means. for moving said elevator lift and the-bowl thereon to' a position at which the contents of said bowl may be removed by rotation of the bowl only while said liftand seat retain their horizontal, position,

' '7. An elevating mechanism for raising and lowering vertical mixing, machine vessels com prising a frame, anelevator movable-therein, and provided with a lift having a seat constructed and arranged to occupy a substantially horizontal position, a plurality of rollers in said seat, a mixing vessel to be'emptied located on said seat,

said vessel being formed with atiltingdevice constituting a part thereof arranged to engage and travel on said vrollers'to. removably positionsaid vessel on said seat for'elevation therewith, and

-means to effect relative movement hetweenfsaid device and vessel positioned on said, rollers to rock said vessel bodily on said device into dis-h charging position while said seat remains. in said horizontal position} Y 8. In a machine for handling mixing bowls, a

frame, an elevator movable therein to and from receiving' and discharge positions, a supporting surface for a bowl on said elevator, a plurality of flanged rollers mounted upon said surface, a

mixing bowl-located'upon said rollers, a track extending around the bottom and up the sides of said bowl at right angles to the rim thereof, said track being adapted to fit between the flanges and cooperate with said rollers to provide positive guidance for said bowl when it is tilted on said rollers toiemptying position.

9. In a machine for handling'vertical mixing machine vessels, a frame, an elevator lift movable therein to transfera vessel to andfrom receiving and discharging stations,'spaced rollers on said elevator'lift, and means for removably supporting said vessel for bodily rotation on said rollers into and out of discharge position, said means including a track on the exterior of said vessel cooperating with said rollers for allowing" said vessel to be tiltedthereon when the vessel has been lifted to the discharge station, and said discharge vator lift for positioning a bowl for tilting, a bowl having tilting means" forming a part thereof located rotatably uponsaid seat, and adapted to be emptied at'said emptying station, a device mounted. upon said frame for tilting said bowl on said seat withouttilting the seat,- said means cooperating with said saiddevice as said bowl is upon its seatxto emptying position while said seat retains a horizontal position,

. 11. An elevating mechanism for handlingmixing bowls having a spheroidal bottom mixing portion with a cylindrical portion extending upward therefrom comprising aframe, an elevator movbeing elevated to rotate said bowlon said means able therein and provided with a bowl seat, mechanism for operating said elevator, including a shaft, a plurality of rollers disposed in, a horizontal plane on said seat, a mixing bowl positioned rotatably on said rollers, and means on said bowl engaging said rollers for locating said bowl for elevation and allowing said bowl to be moved-on said rollers to emptying position, and means mounted in said elevator and cooperating with said shaft for taking up the over run thereof and preventing damage to said; elevator when said mechanism is rendered inoperative at the limits of movement of said elevator.

12. In amixing bowl elevating mechanism, the combination with a base and a frame secured thereto, of a bowl elevator movable therein, spaced flanged rollers mounted in said elevator and forming a guide for a bowl positioned thereon,

and means forming a permanent part of said bowl engaging said rollers to locate said bowl for tilting on said rollers.

13. In a mixing bowl handling device, the combination with a mechanism for raising and lower ing filled mixing bowls, of an elevator device provided with a plurality of supporting members, a bowl having tilting means forming a part thereof positioned on said members and cooperating with said members to locate said bowl for tilting,

.a tilting element carried by said bowl, and means for tilting onsaid means, a tilting element carried by. said bowl, a device mounted on said mechanism and coasting with said element to tilt said bowl only on said means during the upward movement of said elevator, and means to stop the upward movement of said elevator after said bowl has been tilted.

' 15. In a mixing bowl handling machine, an elevator mechanism comprising a base, an upright frame and an elevator movable therein from bowl receiving to bowl discharging position, means to deliver a bowl to said elevator, said means including a truck detachably engaging with said base, comprising a pair of spaced carriages, an underslung member connecting said members, wheels mounted on the corners of said truck, vertical positioning elements mounmd on said carriages, shafts mounted in said elements, rollers on said shafts on which said bowl is positioned, and wheels mounted on said truck 'for allowing said bowl to be moved onto said elevator whereby said connecting member moves under said elevator and said elements position said bowl over said seat.

16. In an elevating mechanism for handling mixing bowls, a frame, an elevator mounted for movement in said frame, a bowl positioned on said elevator and adapted to be tilted at the upper position of said elevator for emptying its contents, a tilting element carried by said bowl, a member secured to said frame, and adapted to be moved to and from said elevator as it is moving upward, a device mounted upon said mem ber and adapted to engage said tilting element when said member is moved toward said elevator, whereby said device coacts with said element to gradually tilt said bowl as the elevator moves to its upper position, while the elevator retains a horizontal position.

WALTER F. DEHUFF.

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