US2783787A - Valve trip controlling mechanism for filling machines - Google Patents

Description

March 5, 1957 c. DAY ET AL VALVE! TRIP CONTROLLING MECHANISM FOR FILLING MACHINES 2 Sheets-Sheet 1 Filed Sept. 25, 1952 INVENTORS:

Car l L. Bay, 2

I072 G JZwF:Zker,- BY Q 1 l( 2.

AA ATTORXEXLS'.

March 5, 1957 c. L. DAY ET AL 2,783,787

VALVE TRIP CONTROLLING MECHANISM FOR FILLING MACHINES 2 Sheets-Sheet 2 Filed Sept. 25, 1952 INVENTORS;

and -D y,

BY J ohn (LVjLeZker,

ATTORNEYS.

United States Patent() VALVE TRIP CONTROLLING MECHANISM FOR FILLING MACHINES Carl.- L. Day and John G. Voellcer, Baltimore, Md., assignors to Crown Cori; 8.: Seal Company, Inc., Baltimore, Mdz, a corporation of New York Application September 25, 1952, Serial No. 311,502

Claims. (Ci. 141-141) The present invention relates to valve trip controlling mechanisms for filling machines.

- Filling machines of the type usedto fill bottles or other containers with carbonated beverages, including beer, ordinarily are provided with some arrangement to prevent the filling head valve from operating in the event that no container is positioned beneath the filling head to receive the beverage. If the filling head is of the type including a rotary valve element first movable to cause counterpressure to be established in the container and then movable to cause flow of liquid to the container, it is usual to provide mechanism operable when no container is positioned beneath a filling head to retract the trip plunger which ordinarily moves the filling head valves to the counterpressure position. By this system, the operating arm and filling head valve will not be moved to counterpressure position but will remain in flow shut-off position. Therefore, when the filling head reaches the trip' which ordinarily moves the valve from counterpressure position to filling or liquid fiow position, its valve operating arm will not contact with the second or filling trip. In short, by retracting the counterpressure trip plunger when a filling head has no container aligned therewith, such filling head will be inoperative throughout the remainder of the normal filling cycle.

Huntley and Stewart Patent No. 2,145,765, issued January 31, 1939', Stewart and Gladfelter Patent No. 2,202,033, issued May 28, 1940, Stewart and Rever Patent No. 2,353,523, issued July 11, 1944 and Stewart and Bell Patent No. 2591,739 issued April 8, 1952, show various mechanisms intended to effect the control discussed above. However, it will be observed that each of the above mechanisms comprises a control including either electrical or compressed-air acutated devices. The provision of fluid pressure or electrical devices in the control mechanism has been found to unnecessarily compl ica't'e the mechanism. In other words, while almost all filling machines must be driven electrically and many such machines also require a connection to a source of compressed air, nevertheless, the inclusion of electrical or compressed air operated devices in the filling trip controladds an item of expense both in original cost and maintenance. We have found that an exceptionally efiicient and durable filling trip control can be provided by having the control completely mechanical in its action.

An object of the invention is to provide a filling machine valve trip control mechanism which is: of simple but etficient design and is purely mechanical. in constructionv and operation.

Another object of the invention is to provide a mechanical valve trip controlling. mechanism: which readily can be applied to filling machines heretofore equipped with controls of. the type disclosed in. the four abovementioned patents.

Another object of the invention. isv to provide a valve trip controlling mechanism which is readily adjustable to handle containers of. various sizes.

If a: filling machine has been operating to handle sixi'ice ounce bottles and it is desired to operate it to handle bottles of a. larger. size, it is necessary to raise the filling table superstructure, that is, the reservoir and filling heads, to accommodate. the taller bottles. Because the raising of the filling heads necessitates the corresponding raising ofv the filling head valvetrips, it is necessary that thecounterpressure trip controlling mechanism be such as to. permit raising of that trip. When electrical or fluid pres.- sure mechanisms are provided, such raising. or lowering of the counterpressure trip can be accommodated by including flexible. cable orv hoses in the mechanism. Heretofore, the provision of a mechanical control readilyv ad, justable for this purpose has involved certain difiiculties. which are overcome by the presentinvention.

Still another object of the invention is. to provide filling machine valve trip control mechanism which readily can be rendered inoperative and as readily restored to. operative condition.

The importance of the last-stated object will be apparent when it is realized that before a filling machine is operated to fill. bottles with carbonated beverages, it frequently is desirable to rotate the filling machine. for

a short period oftime to allow water to discharge through,

the filling valves but without bottles on the container supporting platforms. If the counterpressure trip controlling mechanism cannot be thrown out of operation, such trial runs cannot be accomplished. The present invention includes a very simple releasable connection to permit the. counterpressuretrip to be held in filling head actuating position even though no bottle is placed on the platforms beneath the filling heads.

A further objectof theinvention is to provide a mechanism. of the type described including means whereby the counterpressure. trip may swing out of the path of a seized filling head valve and without damaging the mechanical actuating connections.

Still another object. of the invention is to provide a mechanism of the type described wherein the container platform engaging or detector device is of novel form andis readily adjustable with respect to the remainder of the mechanism to enable proper positioning ofthe detector device with respect to the container platforms.

Other objects and advantages of the invention will be apparent from the following specification and accompanyingdrawings.

In the drawings:

Figure 1 is a side elevation of the mechanism of the present invention, the view generally being. taken. in a plane radial of a rotary filling table and showing a container supporting platform and portions of the corresponding filling head and valve in association with the mechanism of the present invention.

Figure 2 is a view looking toward Figure 1 from the left of the latter figure, this view also diagrammatically indicating a number of container supporting platforms, valve arms and trips, and the platform controlling cam. Figure 3 is a fragmentary top plan view illustrating the mounting of the platform engaging or detector roller. I Referring initially to Figure l of the drawings, the numeral 10 designates the rotary filling table of a filling machine of the type disclosed in the above-mentioned Huntley et al'., and Stewart et al. patents, only a fragmentary peripheral portion of the filling table being shown. As-is indicated in Figure 2 and as also appears in said patents, the filling table it) will rotate with respect to the machine base 11 about a vertical axis and will be provided with a number of vertically movable container supporting elements, each comprising a plunger 12 vertically reciprocable in one of a plurality of bores formed in table 10 and each plunger having a platform 14 secured to its upper end and which platform supports a bottle or other con tainer during its movement with the filling table.

As is described in said patents, the containers to be filled on a rotary filling machine enter the machine on a straight line conveyor and are moved from that conveyor by a rotary infeed dial or spider which positions successive containers B on the platforms 14 as shown in Figures 1 and 2. At that moment, the platform 14 will be in the lowered position A indicated in Figures 1 and 2. An instant after a platform 14 has moved past container receiving position, operation of the machine to carry the platforms to the left as viewed in Figure 2 will cause the roller 15 of each platform to be clear of a cam 1'7 fixed to the base of the machine so that the platform will be moved upwardly either by means of a spring or by means of fluid pressure within a manifold, all as described in said patents. If a platform 14 has received a container from the infeed dial, the raising of platform 14 will cause the container to move upwardly about the nozzle 16 depending from the filling head generally designated at 18 in Figure 1. During movement of the container upwardly about nozzle 16, the mouth of the container will contact with a centering bell 20 vertically slidable upon the nozzle 16, with the result that the bell 20 will be raised to the dotted line position indicated in Figure l. The raising of the platform 14 will continue until the spring pressure or fluid pressure exerting the lifting force causes the mouth of the bottle to be firmly pressed against a sealing gasket within centering bell 26 and, in turn, presses the centering bell into scaled engagement with the body of the filling head 18. The distance which platform 14 and plunger 12 may thus rise when a bottle is positioned thereon is indicated by the dotted line platform showing N of Figure l and the showings N of Figure 2. It will be noted from Figure 1 that a platform in position N will be below a detector roller or platform engaging member 22 forming part of the present invention and, therefore, the platform will not contact with roller 22.

As is described in said patents and as is mentioned above, each of the container supporting platforms 14 will be in vertical alignment with a filling head 18. Said patents further describe the filling heads as including a filling valve of rotary disk type including a depending generally radial arm 24 including an outwardly projecting striker lug 26. Shortly after a platform 14 has been raised to position B of Figure l, the rotation of the filling table will cause the lug 26 of the depending valve operating arm 24 to move past the trip plunger 28 of the connterpressure trip mechanism. Because the platform 14 under discussion has received a bottle B and, therefore, only has risen to position N, such platform will not contact with roller 22. Therefore, plunger 28 will be in the dotted line position of Figure l, and will be struck by lug 26 of arm 24, so that the arm will be rotated from the closed position indicated at C in Figure 2 to the counterpressure position Cl? indicated in the same figure and also shown in dotted lines in Figure 1. With the operating arm 24 moved to position CP, its disk valve will be in counterpressure flow position with the result that counterpressure gas will flow through filling head 18 to establish counterpressure in container B. The platform 14 and filling head 18 under discussion next will move adjacent a filling trip 29 diagrammatically shown in Figure 2 with the result that the operating arm 24 will be moved from position C? of Figures 1 and 2 to filling or liquid flow position F of the latter figure.

All of the above assumes that a bottle B is placed upon a platform 14 as the latter moves past the container infeed dial. It willbe observed that if the above cycle of operation of the filling head valve operating arm 24 should be carried out when no bottle is placed upon a platform 14, a considerable waste of counterpressure gas would occur when operating arm 24 is moved to position CP of Figures l and 2. Furthermore, the movement of arm 24 from position CF to position F would result in a waste of carbonated water. The mechanism whereby the present invention avoids this waste of gas and carbonated water is discussed below. However, in general, and as is explained in said Huntley et a1. and Stewart et a1. patents, if a platform 14 does not receive a container B from the infeed dial, the spring or fluid pressure acting on its plunger 12 will lift the platform to the solid line position R of Figures 1 and 2 because no bottle is present to limit such increased rise of the plunger and platform. In such case, the platform will strike detector roller 22 thereby causing trip plunger 28 to be retracted by the mechanism described below.

As is shown in the lower portions of Figures 1 and 2,

a bracket 32 secured to the base or stationary portion of the filling machine alongside the path of travel of filling table 10 has a substantially U-shaped element, or first lever, 34 pivoted thereto. In more detail, element 34 includes an inner vertical leg 36 which is provided intermediate its length with a horizontal disposed pin 38, the ends of the pin being journalled in spaced apertured lugs 4t) extending inwardly from bracket 32. Pin 38 thus serves as a pivot for element 34.

At the lower end of leg 36 element 34 includes a horizontally extending portion or leg 42 and an outer vertical leg 44- extends upwardly from the outer end of leg 42. At its upper end, leg 44 includes a pair of outwardly extending apertured bosses 46. As is best shown in Figure 2, the bosses 46 are spaced apart laterally and have pivot pins 48 extending through their apertures, the inner ends of the pins being threaded in a collar 50 secured to a vertical link 52 by means of set screws 54. The portions of the pins 48 extending through the bosses 46 are unthreaded to thereby provide a pivotal connection between element 34 and collar 50.

it will be noted from Figure 2 that the outer vertical leg 44 of element 34 is offset to the left with respect to the inner vertical leg 36, this positioning being due to the fact that the horizontal leg 42 is correspondingly angled or offset. As is also apparent from Figure 2, the detector roller 22 is generally centered with respect to the inner vertical leg 36 while the plunger 28 is generally centered with respect to the outer vertical leg 44. Hence, the detector roller 22 will be actuated by a platform 14 an instant before the corresponding valve operating arm 24 comes adjacent plunger 28. In other words, the slight angular offset of the horizontal leg 42 enables plunger 28 to be retracted by a platform 14 before the corresponding valve arm 24 reaches plunger 28.

Referring again to the pivoted element 34, the upper end 56 of the inner vertical leg 36 is of planar form. As is best shown in Figure 3, a plate 58 including a journal pin 60 for the detector roller 22 is adjustably mounted on planar end 56 by means of set screws 62 whichextend through a slot 64 in plate 58 and into threaded sockets in portion 56. The provision of this pin and slot connection of plate 58 to element 34 enables the position of roller 22 to be adjusted along the path of travel of the filling table. Thus, if the detector roller 22 is not contacted by a raised platform 14 soon enough to enable plunger 28 to be retracted in proper time, plate 58 may be moved downwardly as viewed in Figure 3 to thereby retract plunger 28 somewhat sooner. It will be understood that in Figure 3 the filling table is rotating in the direction of the arrow appearing in that figure.

A spring 66 extends between the horizontal leg 42 of element 34 and the bracket 32, spring 66 thereby urging element 34 in a clockwise direction about its pivot 38. A stop pin 68 adjustably threaded in horizontal leg 42 is adapted to contact with bracket 32 to limit this counterclockwise motion of element 34. It will be understood that bracket 34 normally is inclined in a clockwise direction from the position illustrated in Figure 1, that figure showing the element 34 in the position to which it will be' moved by a platform 14 which is not carrying a bottle.

Referring again to the link 52, it will be noted that magmthe upper end. of, the link is pivotally connected by a horizontal pin 70' to a second" lever or hell crank 72. As best shownin Figure 1', bell crank 72 includes a horizontalleg 74-connected to link 52 and a vertical arm 76 whi'chextends upwardly. Bell crank 72 is. pivoted at the angle between its arms and by means of a horizontal pin 78 to a fitting. 80 secured to a bracket 82 supported on the stationary or base portion of the filling machine as disclosed in said patents, bracket 82 being above the bracket 32 which supports-the element 34. Bracket 82 also supports an upstanding. fitting 84 which is connected to bracket 82 by means of a vertical pivot generally indicated at 86. As. is described in said patents, the pivot connection 86 permits fitting 84 to turn in. the event that plunger 28 is struck by a seized valve operating arm 24.

Fitting. 84. carries a plunger housing 88 in whichthe plunger 28 is positioned for horizontal movement along a line radial of the filling table- Plunger 28' preferably will be urged to the inner and dotted line position of Figure l by meansof a spring such as. provided in the structure shown in said Stewart and Bell patent.

At its: outer end plunger 28 includes a. horizontal stud 90 which is. threaded into a block 92. Block 92 carries a link. 94 at its outer end, link 94 being pivotally connected to block 92 by a horizontal pin 9'6 which extends across a vertical kerf 98 in. block 92, so that the inner end of link 94 lies within the kerf. A pin 100 extends downwardly from the inner portion of link 94 and a spring 1&2 connects. the' outer end of pin. 100 to a stud 104 on block 92. Spring 102 thus urges link 94 to the horizontal position illustrated and in which position a flat lot; on the inner end of the link will contact with the opposed surface of block 92.

As is best shown in Figure 2, block 94 extends through anaperture in the outer end ofhousing 88 and the side edges 107 of this aperture lie closely adjacent and are parallel to the side surfaces of block 92. By this arrangement, plunger 28 can be held against any tendency toward oscillation imparted thereto by a valve arm.

As is illustrated in Figure l, the underside of link 94 is slotted or grooved as indicated at 198 and the upper end of the vertical arm 76 of bell crank 72 normally will be positioned in this groove. Thus, lever 72 and link 94 have a tongue and groove connection with each other. Because of this connection, if plunger 28 is struck by a seized valve operating arm 24, bracket 84 and housing 88 may swing about the pivot 86 without impedance from the arm 76 of bell crank 72.

The provision of the link 94 pivotally connected to block 92 enables plunger 28 to be disconnected from bell crank 72 by swinging link 94 upwardly on its pivot 96. When this has been done, the filling machine may be operated without bottles on the platforms 14 and the fact that the platforms may then raise to position R will not cause the plunger 28 to be retracted. As has been mentioned above, this type of operation frequently is desirable before beginning a run of filling.

The operation of the mechanism will be apparent from the opening portion of the specification as well as from the detailed discussion set forth in connection with the description of the detailed parts. In brief, if a platform 14 does not receive a bottle B or other container, the platform will rise to position R of Figure 1. As a result, the outer edge of the platform will contact with detector roller 22, thereby moving element 34 in a counterclockwise direction about its pivot 38 to the position illustrated in Figure 1 and against the action of spring 66. The resulting downward movement of link 52 will swing bell crank 72 in a counterclockwise direction about its pivot 78 to the position illustrated in Figure 1, thereby retracting the counterpressure plunger 28 from the dotted line position of Figure 1 to the solid line position of the same figure. Hence, when the valve arm 24 of the filling 6 head 18 corresponding to the platform. 1.4 under-discussionreaches plunger 28, plunger 28 wilI'have been retract'ed and will not contact arm 24 to rotate it to counterpressure position CP, Thus, that arm 24' will move entirely below the filling trip 30 of Figure; 2 instead of contacting with trip 3010' be moved to filling" or liquid flow position F. Hence, no counterpressure' or" liquid will fiow from the filling head 18. As soon as the platform 14 under discussion and raised to the. extreme upper position R has moved out. of contact with roller 22, spring. 66 will restore the element 36 tov normal position, thereby also lifting. the link 52 and swinging bell crankto normal position. The spring within housing 88 asdescribedin said Stewart and. Bell patent will assist in this action and'also' will positively assure that'counterpressure plunger 28' immediately will return to the dotted line position. of Figure 1 inreadine'ss to contact with the next. valve arm 24 if the platform of that valve arm carries a bottle or other container.

If the filling machine superstructure ismoved upwardly or downwardly to handle containers of greater or less height, it only will be necessary to move the bracket 82 in the proper direction and in accordance with usual practice'. Suchmovement of the bracket 82 will be possible after the set screws 62' have beenloosened with respect to link. 52 When bracket 82 has been positioned. at the proper height, the set screws 62 can be tightened again on link 52. I

It will beobserved that the present mechanism readily can be applied to a trip control mechanism of. the type shown in said Stewart and Bell patent to convert the latto: to mechanical operation. In more detail, a rightangled member can be secured to the outer end. of the lower lever. of' the patented-device to give it the'for'm of the element 42, block 92 can be secured to the; plunger of the patented device and the link 52 and bell crank 72cm be mounted and; connected. With this done, and the" roller 22 provided, -a mechanical connection will be obtained between the trip plunger and lever of the patent.

The terminology used in the specification is for the purpose of description and not of limitation, the scope of the invention being indicated in the claims.

We claim:

1. The combination in a filling machine, of a base, a table rotatable in a horizontal plane relative to said base and including a plurality of filling head-s and container supporting platforms, one of said platforms being below and vertically movable with respect to each of said filling heads, each of said filling heads including a filling valve rotatable about a horizontal axis extending radially of said table, said filling valves being provided with operating arms extending substantially radially of their axes, means to lift said platforms upwardly to bring the mouth of a container into engagement with one of said filling heads, said last-mentioned means being arranged to lift a platform to a higher position when no container is positioned thereon, a trip plunger positioned on said base along the path of travel of said operating arms with said table and movable horizontally and radially of the path of table movement, means to normally hold said trip plunger inwardly adjacent said table and in a position to contact with and move said arms, and means to move said trip plunger outwardly when a. platform is lifted to said higher position and including a first lever pivoted on said base about a horizontal axis and having its inner end positioned to contact with a platform in said higher position, a second lever pivoted on said base about a horizontal axis, means connecting the outer ends of said levers, said second lever being operatively connected to said trip plunger to thereby move it outwardly upon contact of a container supporting platform with the inner end of said first lever.

2. A combination of the character described in claim 1 wherein said trip plunger is mounted on said base about a. vertical pivot and is releasable from said second lever upon movement about said pivot.

3. 'A combination of the character described in claim 1 wherei'nsaid trip plunger is mounted on said base about a vertical pivot and its outer end and said second lever have a tongue and groove connection to accommodate swinging movement of the trip about said vertical pivot.

4. 'A combination of the character described in claim 1 including a releasable connection between said trip plunger and said second lever.

5. A combination of the character described in claim 1 including means to hold said trip plunger against ro tation about its longitudinal axis.

I '6. A combination of the character described in claim 1' wherein said means to connect said levers comprises a vertical link, and said first lever is a bellcrank movable about its horizontal axis and including a vertical arm and a horizontal arm, the latter being connected to said link.

7. A combination of the character described in claim 1 including a roller mounted on said first lever about a vertical axis and arranged to be engaged by a platform in said higher position.

8. A combination of the character described in claim 7 wherein said roller is adjustable in the direction of movement of said table.

9. The combination in a filling machine, of a base, a table rotatable in a horizontal plane relative to said base and including a plurality of filling heads and container supporting platforms, one of said platforms being below and vertically movable with respect to each of said filling heads, each of said filling heads including a filling valve rotatable about a horizontal axis extending radially of said table, said filling valves being provided with operating arms extending substantially radially of their axes, means to lift said platforms upwardly to bring the mouth of a container into engagement with one of said filling heads, said last-mentioned means being arranged pivoted to said base on a horizontal axis with the upper portion of said vertical leg positioned to contact with a platform in said higher position, container supporting platform engaging means on the vertical leg of said element, a vertically disposed bellcrank pivoted to said base on a horizontal axis and above said element, said bellcrank including a vertical leg and a horizontal leg, a vertical link pivotally connecting the outer ends of the horizontal legs of said element and bellcrank, the vertical legs of said bellcrank being connected to said trip plunger to thereby move it outwardly upon contact of a container supporting platform with said platform engaging means.

10. A combination of the character described in claim 9 wherein said platform engaging means comprises a roller mounted on the upper portion of the vertical leg of said element, said roller being rotatable about a vertical axis, the pivot of said roller being adjustable horizontally with respect to said element.

References Cited in the file of this patent UNITED STATES PATENTS 2,202,033 Stewart et al. May 28, 1940 2,252,291 Dos Santos Mendonca et al. Aug. 12, 1941 2,540,741 Krueger Feb. 6, 1951

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