MULTIPLE TREATING AND AUTOMATICALLY RINSING MACHINE

Abstract: The multiple treating and automatically rinsing machine (11) comprises a swiveling support (12, 16) with a multiple number of firmly attached clamps (76), each capable of grasping a container. Each of the clamps (76) faces a rinsing unit (86, 90, 104, 106) supllied by two fluids and fitted with an injector (106) capable of alternately injecting one of two separate fluids in the container. Each of the rinsing units (86, 90, 104, 106) comprises a disc-type distribution valve (90) capable of selecting one of the two fluids to be injected into the container, while controlling the start and the end of either fluid's injection process.

Description: MULTIPLE TREATING AND AUTOMATICALLY RINSING MACHINE This invention refers to a multiple treating and automatically rinsing machine, in particular for containers destined for liquids . Liquid products such as for example water, syrup, wines, liquors and others are usually put on the market in containers often constituted by bottles. In the industry, such bottles are filled by automatic machines to which they must be conveyed in a clean and ready-to- fill condition. For this purpose, it should be emphasized that the washing and rinsing of the bottles plays an extremely important role, because if not properly done, some bacterial growths may develop to spoil the product in the containers . The existing rinsing machines are suitable for treating by a liquid, such as for instance by sterilized water, water treated with ozone or sulfur dioxide, chlorine and other products, followed by a treatment with inert gas . There are also other solutions where each container is subjected to a double treatment with a liquid product followed by a final step with inert gas, or by a first treatment with a liquid product and a dual final treatment including a successive injection to the container of two different inert gases. In the following, reference will be made to a rinsing machine implementing a process based on a first rinsing step with a liquid product, followed by inert gas. The conventional machines designed for these treatments are known to be of a carousel type, fitted along their perimeter with clamps to grasp the containers and to offer them up to an injector, which enters them in order to inject a liquid or inert gas. The various products to be injected (liquid or inert gas) are selected by control valves. These control valves have a hollow body with projecting stakes, whose sliding motion is controlled by cams on the same machine. These stakes actuate a piston that connects the nozzle with the circuit of the liquid product or with the circuit of the inert gas. These conventional rinsing machines have a rather complex structure and may in some cases turn out to be poorly reliable. These drawbacks are mainly typical of the control valves. Moreover, the traditional machines are costly, especially as regards their maintenance. This can again be imputed to the action of the control valves, which require frequent maintenance and adjusting action. The purpose of this invention is to eliminate the mentioned technical drawbacks, by producing a multiple treating and automatically rinsing machine of a not merely simple, but also highly reliable design. A further purpose of this invention is to produce a rinsing machine of an essentially inexpensive type. A further scope of the invention is to produce a rinsing machine not demanding frequent maintenance and/or ad usting action. Not the last scope of the invention is to produce a multiple treating and automatically rinsing machine of an essentially safe design. These and other purposes, according to this invention, are achieved by producing a multiple treating and automatically rinsing machine according to claim 1. Further characteristics of the machine will be defined m the following claims. In an advantageous manner, the multiple treating and automatically rinsing machine according to this invention allows modifying the treatment, m terms of an exposure to each individual fluid (liquid or inert gas), as well as of the overall time of exposure to said fluids. This renders the machine's operation highly flexible, as it can be readily adapted to the prevailing needs, as well as to the particular type of liquid to be fed to the containers, and to miscellaneous other variables. Further characteristics and advantages of a multiple treating and automatically rinsing machine according to this invention will be more evident from the following description, which is provided for exemplifying and non-limiting purposes and referred to the simplified attached drawings, in which: Figure 1 shows a simplified top plan view of the rinsing machine according to this invention; Figure 2 shows an enlarged cross section drawn along the line II-II of Figure 1; Figure 3 shows an enlarged cross section drawn along the line III-III of Figure 1 ; Figure 4 shows an enlarged cross section drawn along the line IV-IV of Figure 1 ; Figure 5 shows a first enlarged cross section of a control valve mounted on the rinsing machine according to this invention; Figure 6 shows a second enlarged cross section of the same valve shown in Figure 5; Figure 7 shows an exploded view of a body, a stationary and a mobile disc constituting the distribution valve of the machine according to this invention; Figure 8 shows a view of the distribution valve in a first operating position; Figure 9 shows a view of the distribution valve in a second operating position; Figure 10 shows a view of the distribution valve in a third operating position; Figure 11 shows a view of the distribution valve in a fourth operating position; and Figure 12 shows a view of a different form of execution of the distribution valve in the first operating position. The mentioned figures show a multiple treating and automatically rinsing machine, as indicated in its overall form by the reference number 11. The machine 11 has a carousel-type structure and comprises a swiveling support constituted by a shaft 12 whose one extremity 12a is inserted into a support 14, while its opposite extremity 12b is firmly attached to a plate 16. The shaft 12 is surrounded by a splashguard 17 to protect the shaft 12, thus preventing any damage by the fluids used to rinse the containers. On one of its portions next to the extremity 12a, the shaft 12 exhibits a longitudinal recess housing a flap 18, which is blocked in position by screws. The flap mounts a bushing 20 whose one extremity is firmly attached to a an element profiled in the shape of a dish 22, and whose free edge carries a sprocket wheel 24 capable of actuating the shaft 12 in a rotating manner. The other extremity of the bushing 20 is inserted into a first extremity of a sleeve 26 with an interposed pair of bearings 28. This extremity of the sleeve 26 is firmly attached to an annular plate 30, which is in turn firmly attached by screws to a supporting plate 32. A second extremity of the sleeve 26 is equipped with a bearing 34 which includes a bushing 36 mounted to slide along the shaft 12. The sleeve 26 holds a further sleeve 38 which carries a bushing 40 at one of its extremities turned toward the annular plate 30. The other extremity of the sleeve 38 carries a bearing 42 designed to connect m a swivelmg fashion to the sleeve 38, by a thickened portion 44 of the shaft 12. The same extremity of the sleeve 38 carries a ring 46 around its outer perimeter, which is firmly attached by screws to an annular plate 48. The outer edge of the plate 48 is surrounded by eight columns 50, which are at their lower ends attached to a ring 52. The ring 52 is attached to some spoke-like beams 54 and near five of the eight columns 50, while the other columns 50 are facing a unit 56 designed to load and unload the containers to be rinsed from a conveyor 58. The beams 54 support, on blocks 60, a washing tank 62 designed to hold the rinsing liquid, which drops to the bottom of the machine 11 by gravity, whenever the containers are being rinsed. The washing tank 62 is further equipped with a discharge tube 63. The ring 52 and each of the beams 54 are also firmly attached to some profiled pieces 64, which carry at one of their free upper extremities some supports 66 of a guide 68. Each profiled piece 64 also attaches to a stiffening rib 70 and a box 72, inside which the container may be manipulated and rinsed. The guide 68 is constituted by a profiled ring extending along the entire length of machine 11 and engaging with some forks 74, each of which is firmly attached to a clamp 76 designed to grasp the containers. Each of the clamps 76 is supported by a fork 78 attached to the plate 16. Each clamp 76 faces a rinsing unit for the containers. The rinsing unit comprises a column 80 attached to each of the forks 78. A ring 82 is m turn suspended from these forks so as to run all around the perimeter of the machine 11, and is equipped with two fittings 84 facing each clamp 76 and carrying a suspended tube 86. The tubes 86 support at their lower ends a second ring 88 similar to the ring 82, and are connected to a distribution valve 90, so as to feed the fluids, liquid or inert gas, by which the containers are to be rinsed. The distribution valve 90 is fitted with a control lever 92, which is actuated m a rotating manner by some cams 94 of the machine 11. In this setup, the cams 94 are provided m a number of four, three of which are supported by curved guides 96. Each valve 90 carries two exit fittings 98, each of which is connected to a flexible tube 100, for example made of silicon plastic. Each of the two flexible tubes 100 connects at its opposite end to a fitting 102 of a trolley 104, which supports an injector 106. The injector 106 is composed of two concentric tubes identifying two ducts, one of which is fed by one of the two flexible tubes 100, while the other duct is fed by the other flexible tube 100. The trolley 104 slides on the tubes 86 while being controlled by a projecting pin 108 which mounts a swiveling wheel 110. The wheel 110 is inserted between the free ends of a guide 112 running along the machine 11. This guide 112 is profiled in a C-shape and supported on platelets and collars 114 by the columns 50. Each fitting 84 holds a flexible tubing 116 connected to a tube 118 bent toward the center of the machine 11. Each tube 113 is in turn connected by flexible tubes 120 with one of two distribution chambers 122, 124. The distribution chambers 122, 124 are formed by a cylindrical body 126 fitted with a partition 127. One extremity of the body 126 is flanged and attached to the plate 16, while the opposite extremity holds two concentric tubes, each of which opens up onto one of the chambers 122, 124 and has a free extremity equipped with a threaded fitting 128. The valves 90 are actuated by cams 94. A first cam 94, which is first contacted by the valves 90 after the corresponding clamp 76 has grasped a container, is mounted on the extremity of a pneumatic cylinder 129. The cylinder 129 can be operated so as to pass the valve 90 without starting the rinsing treatment, whenever a sensor, of a known art and not shown here for simplicity, detects that the corresponding clamp 76 has failed to pick up a container . The other three cams 94 are on the other hand mounted on a detachable manner on the guides 96, so as to allow their adjustment. The machine 11 is also fitted with additional cams 130 attached to the plate 48, which control the opening and/or closing action of the clamps 76. The valves 90 are of a type made of ceramic discs. Each valve 90 comprises a body 132 equipped with two fittings 134 connecting to the two tubes 86, one of which feeds a liquid and the other feeds an inert gas. Each of the fittings 134 starts a duct connected to an inlet chamber 136a, 136b which are in turn opening up to the wall opposite to that holding the fittings 134. Each of these ducts also has a portion which opens up toward the outside in a lateral position with respect to the body 132, and can be closed by a threaded screw 138. The body 132 also carries two fittings 98. One of the two fittings 98 is connected to a central exit chamber 140, while the other is connected to an additional exit chamber 142. The chambers 140 and 142 open up onto the same wall on which the chambers 136a and 136b open. The wall of the body 132, onto which the chambers 136a, 136b, 140 and 142 are opened, carries a firmly attached lid 144 holding three superimposed discs. One fixed disc 146 is firmly attached to the body 132 by pins 148 which are inserted into its recesses and face some blind holes of the same body 132. The disc 146 is fitted with four through holes, two of which 149 are lined up with the chambers 136a, 136b, while a central hole 150 is lined up with the chamber 140, and one hole 152 is lined up with the chamber 142. As shown in Figure 7, the hole 152 is profiled with one cylindrical portion turned toward the cylindrical body 132, and another portion turned to the opposite side and extended in a radial direction so as to form a channel . The stationary disc 146 is associated with a mobile disc 154, which is capable of rotating with respect to the stationary disc 146 actuated by the control lever 92. As shown in Figure 7, the disc 154 is fitted with three blind channels so as to form three additional chambers 156, 158 and 160, in which a fluid, either liquid or gaseous, accumulates so as to pass one of the holes 149 facing the fluid inlet in the valve 90, at one of the holes 150, 152 of the disc 146 corresponding to the outlets of the fluid from the valve 90, as a result of the rotating motions of the mobile disc 154. The mobile disc 154 is connected to an additional disc 162, which carries some pins 164 connected to the mobile disc 154 and attached to the extremity of a shaft 166 which is supported on bearings by the lid 144 and exits from the same lid 144 by a portion leading up to the control lever 92. The lid 144 also holds a pin 168 to act as a stop of the valve 90. The operation of the multiple treating and automatically rinsing machine according to this invention is essentially as follows. The height of the machine 11 can be varied, so as to be adapted to the height of the various containers or bottles to be rinsed in successive treatments. This is done by sliding the sleeve 38 over the sleeve 26, while using a control known by itself and not shown here for simplicity. The containers, which are usually formed by bottles, are moved by the conveyor 58 to the loading and unloading assembly 56 of the carousel-type rinsing machine 11, which rotates as shown by the arrows F. At this point, the clamps 76 operated by the cams 130 grasp the containers and cause them to rotate, so as to arrange them with their openings turned toward the bottom, under the control of the fork 74 and guide 68. The machine described above embodies a rinsing system based on using two fluids and providing a first treatment with a liquid and a subsequent treatment with an inert gas . The liquid and the gas each enter from one of the fittings 128 and accumulate in the distribution chambers 122 and 124. In the following it will be imagined that the liquid is introduced into the machine 11 through an upper fitting 128 and that it accumulates in the chamber 122, while the gas enters through the lower fitting 128 and accumulates in the chamber 124. The liquid and gas are both flowing through the tubes 116, 118 and 120, respectively, entering the distribution valve 90 through the tube 86, and filling the chambers 136a and 136b, respectively, and the hole 149 aligned with the latter. The valve 90 selects which of the liquid or gas must be conveyed to the outlet under the control of the cams 94. The liquid or gas selected by the valve 90 reaches the corresponding exit fitting 98 and moves up to the injector 106, after passing the flexible tube 100. The injector 106 may slide from a resting position in which its supporting trolley 104 occupies a position below the tube 86 to an operating position in which the trolley 104 occupies a position above the same tube 86, so that the injector can at least partially enter the container. The motion of the trolley 104 which allows for the passing of the injector 106 from a resting to an operating position and vice versa, is controlled by the guide 112, through the wheel 110 and the pin 108. The injected liquid drops into the washing tank 62 by gravity, and may thence be removed by the discharge tube 63. The distribution valves 90 are controlled by the four cams 94. The position of each of the cams 94 may be changed so as to vary the rinsing process, for example by lengthening or shortening the treating phases with the liquid or gas. Moreover, whenever a sensor, not shown here for simplicity, fails to sense the presence of the container on the clamp 76, the pneumatic cylinder automatically slides on the cam 94 supported on the same, and causes it to miss the control level 92 of the corresponding valve 90. This prevents the rinsing process from starting, and because the lever also fails to encounter the subsequent cams 94, the rinsing process opposite the clamp 76 without a container also fails to occur. and unloading assembly 56, can grasp a container and initiate the rinsing process. The operation of the distribution valve 90 is clearly evidenced in the figures from 8 to 11, which show the configuration of the valve 90, and in particular the position assumed by the mobile disc 154 with respect to the stationary disc 146 and to the body 132, in the four stretches passed by the latter between the four cams 94. Figure 8 shows the configuration of the valve 90 in the stretch of the machine 11 facing the loading and unloading unit 56. As seen, in this stretch both holes 149 are closed and therefore no liquid or gas can cross the exit fittings 98 of the valve 90. Figure 9 shows the configuration assumed by the valve 90 in the stretch between the first cam 94 mounted on the pneumatic cylinder 129 and the second ' cam 94. In this case, the liquid accumulated in the chamber 136a and in the corresponding hole 149 crosses the chamber 160 and the hole 152, enters the chamber 142 and exits from the valve, while passing its corresponding fitting 98. The gas is on the other hand left behind in the chamber 136b and in the corresponding hole 149, which is closed off by the mobile disc 154. Figure 10 shows the configuration assumed by the valve 90 in the stretch between the second and the third cam 94. It is obvious that in this case no liquid or gas can escape from the fittings 98. The figure 11 finally shows the configuration assumed by the valve 90 in the stretch comprised between the third and the fourth cam 9 . In this case, the liquid is trapped between the chamber 136a and the corresponding hole 149 closed off by the mobile disc 154. The gas, on the other hand, moves from the chamber 136b and the corresponding hole 149 across the chamber 156, enters the central hole 150 to pass into the chamber 140, and exits from the valve 90 across the corresponding fitting 98. In an alternative embodiment, the rinsing machine according to this invention is essentially similar to that just described, but is capable of implementing a rinsing process which envisions three successive treatments with liquid and/or inert gas. Such a process usually consists of a first liquid treatment, a second liquid or inert gas treatment, and a third inert gas treatment. The rinsing machine in this embodiment remains essentially the same as previously described and differs from it only because of the presence of a third inlet fitting to the machine, in addition to the already available fittings 128. This third fitting allows conveying said fluid, either liquid or gaseous, across the tubes 120, 118, 116, 86 and up to the valves 90. The latter have a construction and operation similar to those already described; one of these valves is shown in Figure 12, for purely exemplifying and non limiting purposes. These valves have three inlet fittings 134, one for each of the various fluids, but only two exit fittings 98. The liquid, or both of the liquids if there are two, in fact passes one of the two fittings 98, while the gas, or both of the gases if there are two, passes the other fitting 98. The operation of the valve with three inlet and two outlet fittings as well of the machine mounting it is essentially similar to that described above, and its description is therefore omitted for brevity. It has in practice been verified that the multiple treating and automatically rinsing machine according to the invention is particularly advantageous, being extremely reliable. It also requires very few adjustments, which can at any rate be performed in a simple and rapid manner. It should further be mentioned that the machine built according to this invention embodies a rinsing process with liquids and gases which are kept separate up to the moment of injecting them into the container. This prevents a mutual contamination of the liquids and gases . The multiple treating and automatically rinsing machine thus conceived is subject to numerous modifications and variants, each falling within the scope of the invention; moreover, all the details may be replaced by others of a technically equivalent kind. In practice, the materials and dimensions employed may be of any kind, depending on the technical requirements.

Claims: CLAIMS 1. A multiple treating and automatically rinsing machine (11) comprising at least one swiveling support (12, 16) carrying a multiple number of firmly attached clamps (76) each capable of grasping a container, where each of said clamps (76) faces a rinsing unit (86, 90, 104, 106) fed by at least two fluids and equipped with at least one injector (106) capable of alternatively injecting one of said two fluids into said container, characterized in that each of said rinsing units (86, 90, 104, 106) comprises at least one disc-type distribution valve (90), capable of selecting one among at least two of the mentioned fluids, so as to inject it into said container by controlling the start and the end of the injection process of each. 2. A rinsing machine (11) according to claim 1, characterized in that said distribution valve (90) is actuated by cams (94) firmly attached to said machine (11) . 3. A rinsing machine (11) according to claim 1, characterized in that said swiveling support (12, 16) is constituted by at least one shaft (12) having an extremity (12a) connected to at least one support (14) and an opposite extremity (12b) firmly attached to a plate (16) of said machine (11). 4. A rinsing machine (11) according to claim 1, characterized in that each of said rinsing units (86, 90, 104, 106) includes said distribution valve (90) which is connected to said injector (106) by at least one flexible tube (100) , where said injector (106) is supported by at least one trolley (104) sliding along at least one tube (86), so that said injector (106) may slide, while being controlled by at least one guide (112) , from a resting position pointing down to an operating position pointing up, and vice versa. 5. A rinsing machine (11) according to claim 2, characterized in that said cams (94) are at least two, so that a first cam (94), which is first encountered by said distribution valves (90) after a corresponding clamp (76) has grasped a container, is mounted at the extremity of a pneumatic cylinder (129), while at least three residual cams (94) are mounted in a fixed manner on guides (96), so as to allow them to be adjusted, where such adjustment allows to vary the duration of the various spraying phases depending on the requirements. 6. A rinsing machine (11) according to claim 5, characterized in that said pneumatic cylinder (129) can be operated in a manner to pass said distribution valves (90) without starting the rinsing treatment, whenever a sensor detects that a corresponding clamp (76) has failed to pick up a container. 7. A rinsing machine (11) according to claim 1, characterized in that said distribution valves (90) are of a type based on discs of ceramic or other material . 8. A rinsing machine (11) according to claim 1, characterized in that said distribution valve (90) comprises a body (132) closed by a lid (144) and equipped with at least one inlet fitting (134) which opens up onto an inlet chamber (136a, 136b) inside said distribution valve (90), and at least one outlet fitting (98), also opening onto an outlet chamber (140, 142) inside said distribution valve (90), where said body (132) is associated with at least one mobile disc (154) fitted with chambers (156, 158, 160) designed to alternately connect at least one of said inlet chambers (136a, 136b) to at least one of said outlet chambers (140, 142) , so as to select a liquid or gas to convey to said injector (106). 9. A rinsing machine (11) according to claim 8, characterized in that said distribution valve (90) comprises at least one stationary disc (146) interposed between said body (132) and said mobile disc (154), where said stationary disc (146) is firmly attached to said body (132) and exhibits a first set of through holes (149) lined up with said inlet chambers (136a, 136b) and a second set of through holes (150, 152) lined up with said outlet chambers (140, 142) of said body (132) . 10. A rinsing machine (11) according to claim 9, characterized m that at least one of said second set of through holes (152) comprises a cylindrical portion turned to said body 132 and a portion turned to the opposite side and extended m a radial direction so as to form a channel. 11. A rinsing machine (11) according to claim 8, characterized m that said mooile disc (154) is fitted with a multiple number of olmd channels forming said chambers (156, 158, 160), where said chambers (156, 158, 160) are cyclically put in communication with said through holes (149, 150, 152) of said stationary disc (146) as a result of some rotations performed by said mobile disc (154) . 12. A rinsing machine (11) according to claim 8, characterized m that said mobile disc (154) is connected to a further disc (162) attached to the extremity of a shaft (166) exiting from said lid (144) by a portion carrying a control lever (92) for said distribution valve (90). 13. A rinsing machine (11) according to claim 8, characterized m that said lid (144) is fitted with at least one pm (168) acting as a stop for said distribution valve (90) .

Inventors: BERCELLI GIANLUCA, FOLLI ENRICO, BERCELLI, GIANLUCA, FOLLI, ENRICO
Applicants: BERCELLI GIANLUCA, FOLLI ENRICO, S B R S R L, BERCELLI, GIANLUCA, FOLLI, ENRICO, S.B.R. S.R.L.
Application year: 2000
Main classification: B08B9
IPC codes: B08B9