US2519491A - Stacking machine - Google Patents

Description

Aug. 22, 1950 G. c. MONACO STACKING MACHINE 3 Sheets-Sheet l Original Filed Feb. 25, 1945 .M D., m

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INVENTO R GfoRef C, MOA/Aca BY Y E Mm .T T fw/A Aug., 229 1950 G. c. MONACO STACKING MACHINE 3 Sheets-Sheet 2 Original Filed Feb. 25, 1945 INVENTOR GEORGE MOA/@Co ATTORNEY v .l1g 22 i950 G, C, MQNACQ 2,519,49l

STACKING MACHINE Original Filed Feb. 25, 1945 5 Sheets-Sheet 5 INVENTOR O Lfm@|| N m C. MONACO X Patented Aug. 22, 1950 UNITED STATES PATENT OFFICE STAICKING MACHINE George lC. Monaco, Douglastcn Hills, N. Y.

7 Claims. l

This invention relates to article handling apparatus. More particularly the invention is directedl to an apparatusI for transferring baked objects, such as crackers, biscuits, iig bars and the like from flat position on a cooling conveyor to stacked upright position on a packing conveyor.

In my copending application, Serial No. 450,0?11,v for stacking machines, filed July '7, 1942, and granted as Patent No. 2,358,413 September 19', 1944, I have disclosed a stacking apparatus having a conveyor belt on which cookies delivered from a cooling conveyor are received and raised above a stacking cam which discharges the cookies on a stationary grating. As cookies accumulate upon the grating they' are! pushed forward on to a packing conveyor which carries them to packing operators.

It is an object of the invention to modify the delivery end of the stacking machine and associated receiving end of the packing conveyor so as to eliminate the deposit of cookies upon a stationary element when they are ydischarged from the stacking cam, thereby lengthening the period the machine can operate before cleaning is required?.

Another object of the invention is to provide anv apparatus of the character 'described such that cookies with exposed jam centers will travel on a moving support and any jam deposited on such support will not accumulate, thus preventing any interference with` the operation of the apparatus and frequent stoppage for cleaning purposes.

Another object of the invention is to provide an apparatus of the character described: which shall have the foregoing advantages and yet operate in a highly efficient and satisfactory manner with buty few changes in the apparatus illustrated and described in my said copending application'.

Other objects of the invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will beA exemplied in the construction hereinafter described and of which the scope of application will be indicated in the appended claims.

The present invention is a. divisional application of my application, Serial No. 477,009, for Article Handling Apparatus, filed February 25, 1943 and granted asV Patent No 2,404,882 July 30, 1946.

In the accompanying drawings, in which there 2 is shown one of the various possible embodiments of the invention,

Fig. 1 is a top plan view of a stacking machine and receiving end of a packing conveyor system all embodying the invention, and showingalso'- tne discharge end of a cooler conveyor system;

Fig. 2 is an enlarged fragmentary sectional view taken substantially along the line 2--2 of Fig. l;

Fig. 3, is an enlarged vertical sectional detail View of the delivery end of the stacking machine and associated receiving end of the packing conveyor; and

Fig. 4 is a fragmentary sectional view taken substantially along the line 4--4 of Fig. 3.

Referring now in detail to the drawings, I haveithere shown a stacking machine l0 in the process of arranging cookies such as fig bars F having fig jam centers enclosed in an open-- ended covering of baked sweetened dough. Said machine may have the same general construction as that shown and described in my said copending application, Serial No. 450,011, and comprises a receiving table l2, a series of cookie feeding troughs I4', and a means I5 for stacking the cookies, all supported on a frame I8. The receiving end of the stacking machine is disposedr below the discharge end of an article processing machine such as a cooling conveyor system 20, and the discharge end of the stacking machine terminates at the receiving end of an article moving machine such as a conveyor packing system 22.

The receiving table l2 comprises an inclined endless conveyor belt 24 which travels over an upper roller 26, a lower roller 28', a driving roller 39 and a pair of take-up and idling rollers 32, 34. The driving roller 39 is fixed to a shaft 38, turned from a source of power (not shown) which may comprise the same source of power as that employed to actuate the packing and coolingconveyor systems 2Q, 22. All of said rollers 255, 28 and 30 are journalled in side pieces 40 of the frame 2D.

The upper run 42 of the belt 24 is supported by an inclined plate dit extending between the side pieces is and terminating at arcuate ends close- 1y overlying the rollers 2B, Z8. The top` surface of this run of the conveyor belt is broken up into the cookie feeding troughs i4 by a plurality of parallel spaced separator strips 45 especially constructed in accordance with the present invention. Each of these strips includes a slightly inclined portion it which overlies the tcp run 4.2" 0f the Conveyor belt, a steeply inclined por- 3 tion 50 which forms part of a stacking cam feeding chute, and a horizontal portion 52 which overlies the receiving end of a, packing conveyor belt 54. The terminal of each horizontal portion 52 is provided with suitable means for rapid detachable attachment to a separator strip 55 which overlies the belt 54 and assists in providing a series of troughs 51 in the packing conveyor system. Said attaching means may comprise a yoke 58 on the free end of the horizontal portion 52 which has a transverse pin 66 centrally disposed between the yoke arms. This pin is adapted to be slidably received in a slot 62 cut in the strip 56 near the stacking machine and sloped away therefrom. The pin 60 will normally remain in the slot 62 since the other end of the strip 56 in machines of this type is held by a spring (not shown) which urges the strip 56 away from the stacking machine.

By employing the foregoing construction of separator strips 46, 56, I am able to place one of the rollers 64, for the packing conveyor belt 54 immediately beneath the point where cookies are discharged from the stacking means I6. There is thus provided a moving surface beneath the g bars which after stacking rest upon an end on which the jam center is exposed.

The packing conveyor belt 54 may conventionallly have its upper run supported on a horizontal plate 66. The far end of the conveyor belt 54 is supported on another roller (not shown) horizontally aligned with the roller 64 and one of these rollers may be driven from the common source of power.

The steep portion 50 of each stacking separator strip 46 is supported on a slide comprising a steeply inclined stationary plate 68 down which iig bars gravitate to the stacking means 6 after leaving the receiving belt 24. In order to accommodate the separator strips 46, the upper surface of said slide plate 68 has a plurality of spaced parallel slots 10 therein in which the strip portions 50 are snugly received. In addition, channels 1| are cut through a portion of the plate 68, for example the top edge, to form a plurality of vertical extending holes, one in each slot 10. These holes are adapted to receive and hold an integral leg 12 pendant from the steeply inclined portion 50 of each separator strip 46. By disposing the leg 12 in this fashion I am able to securely anchor the stacking and packing separator strips and to prevent the forward portion 52 of the stacking separator strip from pressing heavily on the packing conveyor belt 54. The lower edge of the slide plate 68 terminates immediately above the stacking means I6, and said plate is supported on the side frame pieces 40.

As shown in my copending application, Serial No. 450,011, the troughs formed by the steeply inclined portions 50 of the separator strips and the slide plate 68 are enclosed to provide steep feeding chutes by topping strips 14 of formmaintaining sheet material. Each strip 14 is so constructed and arranged that it has a portion lying parallel to and spaced from that portion of the top run 42 of the stacking conveyor belt which approaches the top roller 26. Each strip also has a portion overlying, spaced from and substantially parallel to the steeply inclined plate 68.

An auxiliary plate 16 attached to the lower end of each of the strips 14 enables adjustment to be made of the position of the discharge end of the feeding chutes.

The topping strips are Supported by a common y positioning means comprising a non-circular rod 18 which extends across the full width of the stacking machine. At its two ends said rod is threadedly received on bolts 80, which are freely rotatably supported on shallow U-brackets 82. The upturned ends of the brackets are caught between pairs of threaded rods 84, 86 each of which freely passes through a bore in one of a pair of spaced lugs 88, 90 projecting from the side pieces 40. The rods 84, 86 have nuts 92 threaded on their opposite ends and adapted to be tightened. against opposite surfaces of the lugs 88, 90. When it is desired to adjust that portion of the strips 14 overlying the top run of the stacking conveyor belt 24, lock nuts 94, which are threaded on the bolts 80, are loosened to permit said bolts to be turned. This will move the strips 14 towards or away from the belt 24. To adjust the strip relative to the steep plate S8, the nuts 92 are loosened and the screw rods 64, manipulated.

Each topping strip 14 has a light channel 96 welded thereto. One flange of said channel lies parallel to the topping strip and is spaced from a. plate 58, suitably held to the main channel web. This plate and the channel flange just mentioned are adapted to receive the rod 18 therebetween. Screws |60 draw the -plate and flange together to rmly anchor the topping strip 14 to said rod.

The means I6 for vertically stacking iig bars F received from the steep chute comprises a shaft |62 having a non-circular portion extending across the machine l0. The ends of the shaft are rotatably journalled in the side frame pieces 40, where it may be driven by the common source of power. Mounted for rotation with said shaft are a plurality of registered stacking plate cams |04, having central apertures |06 which match the non-circular contour of said shaft. Said stacking cams are maintained in spaced position along the shaft |02 by collars |08. Several stacking cams are employed in conjunction with each trough I4, the exact number being controlled by the type and width of cookie and varying from two to six or more. As a rule, one cam is placed between each of the slots 10 in the slide plate 68 so that the stacking separator strips 46 can pass iin operative position through the stacking means.

The cams |04 are of any suitable shape and may, as shown in my copending application, comprise a portion of constant radius which blocks off the discharge end of the feeding chute when positioned therebeneath; another portion consisting of a deep identation in the periphery of the cam and which is of sucient size to receive a single cookie; and a portion of varying radius intermediate the indented and the constant radius portion, said intermediate portion being adapted upon rotation of the cam in a counter-clockwise direction (as viewed from Figs. 2 and 4) to press the cookie toward the left. The lower halves of the cams |04 below the shaft |02 are sandwiched in a grating ||0 comprising several short parallel bars l2, supported on a crossrod ||4 extending between the side pieces 40. The bars |2 have their top edges entering between adjacent cams |04 and running substantially up to the conveyor roller 64, being in horizontal alignment with the top run of the packing conveyor belt 54. These bars are employed to arrest the downward descent of a cookie disposed in the indentations of a set of stacking cams at the time it reaches the level of the packing conveyor belt so that it may thereafter be pushed on to said belt by the intermediate portion of the cam. It will be appreciated' that due to the constant rotation of the cams therebetween there will be no tendency to accumulate iig jam on the bars H2.

Note should be taken of the fact that the tips of the grating bars H2 terminate substantially at the extreme outer periphery of the stacking cams |84 in contrast with prior practice in this art, wherein the grating bars extended for a substantial distance beyond the stacking cams in order to provide a stationary support for the packing separator strips 55 as shown in my copending application. This shortening of the grating bars and concomittant advantageous relocation of the packing conveyor belt roller 64 immediately adjacent the stacking cams is only p-ossible because the packing separator strips 56 in the present invention are no longer supported by a stationary structural element over and on which the cookies pass subsequent to stacking but by an element, such as a separator strip 46 of the stacking machine, which is not contacted by the under surface of the stacked cookie-s.

At the receiving end of the conveyor belt 24 the stacking separator strips 45 are all pivotally attached by pins H6 to a shake bar H8, which has a reciprocatory motion imparted thereto in order to cause cookies, discharged upon the belt 24 by the cooling conveyor system 20, to be directed into one of the troughs i4. The shake bar carries roller-s |21] at both ends thereof which are received in horizontal slides in guide blocks |22 extending from the side frame pieces 40. An additional roller |24, fixed to the shake bar H8, is adapted to ride upon the face of a cam |26 rotative with the belt pulley 28. Said cam has a plurality of lobes |28 adapted to cooperate with the roller |24 for rapidly reciprocating the shake bar H8 and separator strips 46. The roller |24 is maintained in contact with the cam |26 by a spring |30.

It Will be noted that the ends of the stacking separator strips 4t adjacent the receiving end of the stacking machine conveyor belt 24 are reduced from their full height, this construction being employed to facilitate the dispersal into the troughs I4 of cookies delivered from the article processing system 20.

Said system may be of any type known to the art, and for example may comprise a machine wherein a series of pans or trays are moved in a serpentine manner through a cooling maze and are caused to deposit cookies upon a discharge conveyor belt |32, traveling around a plurality of rollers |34, |36, |33, |40, |42. The foremost roller |34 overlies the top run 42 of the stacking machine conveyor belt 24. The roller Ult serves as a drive, being actuated by the common source of power. The rollers |38 and |42 serve as idlers and takeups. The roller |36 defines the rearmost position of the belt. Due to the short length of the belt |32 and the sharp turns it is required to make, it is customary, but not essential, to make this belt of metal fabric.

Although I have described this portion of the article processing system in some detail, it should be understood that any type of system may be employed in conjunction with the stacking machine embodying the invention, provided only that the system discharges cookies flat and ready for stacking upon the top run 42 of the stacking conveyor belt 24.

Means also may be provided to expedite the transferral of cookies from the article processing system to the stacking conveyor belt. This means may comprise an overriding drive |44, such as is shown and described' in detail in my cope-riding application, Serial No. 477,009, and which essentially comprises a member having a flexible continuous surface which moves in the same general direction as the direction of travel of the cookies but at a speed slightly in excess of that of the stacking conveyor belt. Such surface bears down upon the cookies beingv transferred to frictionally engage the upper surfaces thereof and force the cookies intothe proper troughs.

It will thus be seen that I have provided an article handling apparatus which achieves the several objects of this invention and- Which is well adaptedto meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiment above set iorth, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

l. In combination in an article stacking machine, an inclined conveyor belt, a pair of parallel separator strips overlying said belt and forming a trough therewith extending in the direction of travel oi said belt, stacking means disposed below and beyond the raised discharge end of said belt, a slide intermediate said discharge end and said stacking means, a second conveyor belt beyond said stacking means, said second conveyor belt being supported at the end which receives stacked articles from the stacking means by a roller immediately adjacent said stacking means, and a pair of separator strips overlying said second conveyor belt and forming a trough therewith extending in the direction of travel of said second belt, the separator strips associated with the inclined conveyor belt having portions extending from the upper part of said belt to said stacking means and overlying said slide to form a trough therewith, said last named portions being detachably attached to the separator strips associated with the packing conveyor belt, the ends of the strips associated with said inclined conveyor belt adjacent the lower receiving end thereof being carried by a reciprocating means.

2. A combination as set forth in claim l Wherein a plurality of spaced slots are provided in the slide, in which members connected to the separator strips associated with the stacking conveyor belt are received whereby to anchor said strips and the separator strips associated with the packing conveyor belt.

3. A combination as set forth in claim 1 Wherein a plurality of parallel spaced channels are provided in the face of the slide for receiving the extending portions of the separator strips associated with the stacking conveyor belt.

4. A. combination as set forth in claim 1 wherein a plurality of spaced slots are provided in the slide, in which members connected to the separator strips associated with the stacking conveyor belt are received whereby to anchor said strips and the separator strips associated with the packing conveyor belt, and wherein a plurality of parallel spaced channels are provided in the face of the slide for receiving the extending portions of the separatorstrips associated with the stacking conveyor belt.

5. In combination in an article stacking machine, an inclined receiving belt, a slide extending from the upper end of said receiving belt, a stacking cam at the lower end of said slide, a packing conveyor belt leading away from said stacking cam, a plurality of spaced parallel separator strips overlying and associated with said packing conveyor belt and extending along the direction of travel thereof away from said stacking cam, and a plurality of spaced separator strips detachably interengaging and overlying said slide, the ends of said strips associated with said packing conveyor belt being supported by the strips associated with said slide.

6. In combination in an article stacking machine, an inclined conveyor belt, a pair of parallel separator strips overlying said belt and forming a trough therewith extending in the direction of travel of said belt, stacking means disposed below and beyond the raised discharge end of said belt, a slide intermediate said discharge end and said stacking means, a second conveyor belt beyond said stacking means and supported at the end which receives stacked articles from the stacking means by a roller immediately adjacent said stacking means, a pair of separator` strips overlying said second conveyor belt and forming a trough therewith extending in the direction of travel of said second belt, the separator strips associated with the inclined conveyor belt having portions extending from the upper part of said 30 arator strips associated with the packing conveyor belt and detachably interengaging said slide.

7. In combination in an article stacking machine a rotary stacking means comprising a plurality of parallel spaced plates mounted for common rotation on a shaft, a slide to feed articles by gravity to the said stacking means, a conveyor belt to receive stacked articles from said stacking means, said conveyor belt being supported at the end receiving stacked articles from the stacking means by a roller immediately adjacent said stacking means, and a grating comprising a plurality of parallel bars extending between said stacking plates, said bars running about up to the conveyor roller and being in substantial alignment with the reach of the conveyor belt which receives stacked articles, whereby said bars are adapted to enga-ge articles only after the same have been brought to stacking position and are ready to be fed by the stacking means to the conveyor belt.

GEORGE C. MONACO.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,208,402 Thomas Dec. 12, 1916 1,501,285 Lawrence July 15, 1924 2,205,106 Paterson June 18, 1940

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