Patent Grant
8566994
The present invention relates to the field of cleaning, and more particularly, to the field of cleaning produce bins.
Fresh produce is typically transported from a field to a packing facility in a bin. Each bin may vary in size and is typically constructed of plastic or wood, for example. Each bin is reused several times in a given season, and may be used for harvesting different kinds of produce throughout a calendar year. With each use, each bin accumulates a buildup of organic debris, which may include dirt and caked on mud, leaves, twigs, and fruit and/or vegetable particles. The remaining debris may tend to harbor and promote the growth of bacteria and various pathogens that are potentially harmful to the produce. Moreover, government regulations may require that each bin be sanitized before reuse to avoid contamination of produce. After use, each bin is placed on a trailer for transport to the next field harvest location for reuse in transporting the produce to the packing facility.
At the packing facility, each produce bin is typically placed on a conveyer that will convey the bin and its contents to a dump mechanism. The dump mechanism will invert the produce bin to a degree that with contents of the bin will be removed from the bin. The produce that is dumped from the bin may leave organic debris, such as leaves and twigs, in the bin. The process of placing produce in the bin during the field harvest may cause dirt and/or mud to accumulate on the exterior and interior of the bin. Additionally, placing the bin on the ground during the field harvest may result in the bin collecting dirt and/or debris, as well as potentially produce pathogens. Pathogens may reside in the soil, and, indeed, grove owners will typically trim lower branches to avoid contact with the soil. Some current methods of unpacking the produce either do not remove the organic debris from the bin, or the organic debris is manually removed at a remote location by manual labor and the use of a hand held pressurized washer system. The manual removal of the organic debris is time consuming, expensive to the packing facility, and inefficient in removing the debris.
Prior art attempts, such as those provided by Salazar Machine and Steel, Inc. of Immokalee, Fla., and Durand-Wayland, Inc. of LaGrange, Ga., have automated the debris removal methods. Salazar Machine and Steel, Inc.'s Crate Washer line includes a system that places each crate onto a conveyor belt. The conveyor belt moves the crate into the system where it is washed and sanitized with chemicals via pressurized spray nozzles.
Similarly, a Durand-Wayland, Inc. bin washer system includes a multi-stage system where a bin enters the system in an upright position. A carousel rotates the bin a quarter turn so that it is positioned on its side, which allows a second bin to enter the system. A new bin enters the system and exits the system with each quarter turn. A high-pressure spray system provides cleaning to each bin in the system at each position. A similar Durand-Wayland, Inc. system is a liner floor system that continuously moves a single bin through a high-pressure spray to clean each bin.
However, the prior art attempts use only a pressurized spray solution to attempt to clean each produce bin. The use of a spray solution will likely remove a portion of the organic debris, but may not remove the debris that may be lodged in the bin openings or the debris that has adhered to the bin surface. Still, further improvements are needed to remove organic debris from a produce bin.
In view of the foregoing background, it is therefore an object of the present invention to provide an efficient apparatus for removing debris from produce bins.
This and other objects, features, and advantages in accordance with the present invention are provided by a produce bin washer for washing produce bins of an open-box type having an interior and an exterior. The produce bin washer may include a housing having an inlet and an outlet. The produce bin washer may also include a conveyor for advancing a plurality of empty produce bins along a path of travel through the housing from the inlet to the outlet thereof. At least one scrubbing brush may be provided within the housing adjacent the conveyor and along the path of travel. The produce bin washer may also include a positioner within the housing for sequentially lifting and rotating each empty produce bin from the conveyor onto the at least one scrubbing brush to scrub the interior, and returning the empty produce bin to the conveyor. A sprayer may be included within the housing for spraying a cleaning solution, e.g., water alone or including a detergent, onto the exterior of the empty produce bins at least when positioned onto the at least one scrubbing brush. A collector may be within the housing for collecting sprayed cleaning solution, for example. Accordingly, the produce bin washer may provide more thorough debris removal from a produce bin than debris removal from a solution sprayer alone.
The at least one scrubbing brush may include a core and a plurality of groups of bristles extending outwardly from the core. Additionally, the core may include a rotatable base and an end cap opposite the rotatable base. A plurality of longitudinal struts may connect the base and the end cap together. At least one of the plurality of groups of bristles may be carried by the end cap, and at least one other of the plurality of groups of bristles may be carried by the plurality of longitudinal struts. Still further, the core may define an axis, and the positioner may position the empty Produce bin onto the at least one scrubbing brush so that the axis of the core extends normal to a bottom of the empty produce bin.
The produce bin washer may further include an electric motor coupled to the at least one scrubbing brush. A controller may be coupled to the electric motor for rotating the at least one scrubbing brush in alternating directions. Accordingly, more thorough cleaning may be provided.
The positioner may include a pivotably mounted carriage for temporarily holding the empty produce bin. Additionally, at least one actuator may be included for pivoting the pivotably mounted carriage.
The produce bin washer may further include a filter downstream from the collector, and a solution holding tank downstream from the filter. A pump for delivering cleaning solution from the holding tank to the sprayer may also be included. A sanitizer sprayer may be downstream from the housing along the path of travel, and at least one cleaning solution sensor may be associated with the cleaning solution, for example.
A method aspect is directed to washing produce bins of an open-box type having an interior and an exterior. The method may include advancing, via a conveyor, a plurality of empty produce bins along a path of travel through a housing. The method may further include sequentially lifting and rotating each empty produce bin from the conveyor onto at least one scrubbing brush, scrubbing the interior of the produce bin with the at least one scrubbing brush, and returning the empty produce bin to the conveyor. The method may further include spraying a cleaning solution onto the empty produce bins at least when positioned onto the at least one scrubbing brush. The method may also include collecting sprayed cleaning solution.
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout.
Referring initially to
A produce bin 11, which may be filled with produce, is advanced by the conveyor 17 to an optional produce bin dumper 47. The produce bin dumper 47 removes each produce bin 11 from the conveyor 17, lifts each produce bin, and rotates each produce bin to a degree of elevation that allows produce within the produce bin to be removed and placed in produce processing equipment (not shown). The empty produce bin 11 is replaced on the conveyor 17 where it is advanced along the path of travel 18. The produce bin dumper 47 may not be used in some embodiments.
Referring now additionally to
A sensor 48 is illustratively coupled to the bin scrubber carriage 36 for determining when a produce bin 11 is advanced by the conveyor 17 into the housing inlet 15, and based thereon activates the positioner 21 to remove the produce bin 11. The sensor 48 may include a mechanical limit switch, an optical sensor, or a proximity sensor, for example. Once removed from the conveyor 17, the produce bin 11 and carriage 36 are pivoted by the actuator 37 so that the produce bin is lifted and rotated about 135 degrees, for example, onto the scrubbing brush 20 to scrub the interior of the produce bin. The produce bin 11 and carriage 36 may be pivoted by the actuator 37 so that the produce bin is lifted and rotated at an angle greater than 90 degrees, as will be appreciated by those skilled in the art. As illustrated perhaps best in
Turning now additionally to
Longitudinal struts 28 connect the base 31 and the end cap 30 together. The longitudinal struts 28 are connected to the end cap 30 at the angled portion 29 and to the rotatable base 31 at a mounting bracket (not shown). Another group of bristles 26b is coupled to the each of the plurality of longitudinal struts 28. As illustrated in
The groups of bristles 26b-26c on the longitudinal struts 28 and angled portion 29 illustratively extend outward in a diagonal direction. The diagonal direction advantageously allows for a more thorough cleaning action, including into corners of the produce bin 11, and further advantageously allows debris to be directed toward the inverted open top of the produce bin during scrubbing.
The core 25 defines an axis 32, and the positioner 21 positions the empty produce bin 11 onto the at least one scrubbing brush 20 so that the axis of the core extends normal to a bottom of the empty produce bin. The scrubbing brush 20 advantageously provides increased debris removal, for example, from the corners and crevices in each produce bin 11 where spraying alone will not remove the debris. The increased debris removal provided by the scrubbing brush 20 also advantageously reduces the bacteria and pathogens carried by the each produce bin 11, thus, reducing the likelihood of transfer of produce destroying diseases, such as citrus canker, for example.
Referring again to
Sprayers 22 are within the housing 14 for spraying a cleaning solution 24 onto the empty produce bins 11 at least when positioned onto the scrubbing brush 20. The cleaning solution 24 may be water alone or including one or more detergents, for example. The sprayers 22 may be low-pressure, high-volume sprayers, for example, to facilitate debris removal from both the interior and exterior of each produce bin 11. Also, the sprayers 22 may be high-pressure sprayers and may be coupled to an additional filter for accommodating the high-pressure sprayers, as will be appreciated by those skilled in the art. Still further, the sprayers 22 may selectively spray the cleaning solution 24 continuously when the produce bin 11 is within the housing 14, or just when the produce bin 11 is on the scrubbing brush 20. Alternatively, the sprayers 22 may continuously spray regardless of whether a produce bin 11 is in the housing 14 or not. Other spraying arrangements will be appreciated by those skilled in the art.
A cleaning solution sensor 45 is associated with the cleaning solution 24. The cleaning solution sensor 45 cooperates with the controller 34 to maintain the cleaning solution 24 at a desired pH level, for example. Similarly, the controller 34 may control the oxidation reduction potential (ORP) for maintaining the cleaning solution 24 at a desired ORP level. The controller 34 may also cooperate with the cleaning solution sensor 45 to control other cleaning solution parameters, as will be appreciated by those skilled in the art.
Illustratively, the sprayed cleaning solution 24 is advantageously contained by the housing 14. The cleaning solution 24 drips toward a collector 23, which is within the housing 14 for collecting sprayed cleaning solution 24. The collector may be a drip pan assembly, for example, or other collector, and may also direct sprayed cleaning solution 24 downstream to a filter 41. The filter 41, in turn, is illustratively located downstream from the collector 23, and may advantageously filter solid debris collected from the produce bins 11. A solution holding tank 42 is also downstream from the filter 41 for holding filtered spray solution 24. A pump 43 is coupled to the solution holding tank 42 and delivers the cleaning solution 24 from the holding tank to the sprayers 22. Thus, the cleaning solution 24 is advantageously recycled. Makeup solution may also be added as will be appreciated by those skilled in the art.
After completing a scrubbing and spraying cycle, the produce bin 11 is returned to the conveyor 17. The produce bin 11 continues along the path of travel 18 via the conveyor 17 through the outlet 16 of the housing 14 to an optional sanitizer sprayer 44 downstream from the housing. The sanitizer sprayer 44 may advantageously spray a sanitizing agent to the interior and exterior of each produce bin 11. This may advantageously further reduce the bacteria and pathogens on each produce bin 11, and, thus, reduce cross contamination among facilities.
A method aspect is directed to washing produce bins 11 of an open-box type having an interior and an exterior. The method includes advancing, via a conveyor 17, a plurality of empty produce bins 11 along a path of travel 18 through a housing 14. The method further includes sequentially lifting and rotating each empty produce bin 11 from the conveyor 17 onto scrubbing brush 20, and scrubbing the interior of the produce bin with the at least one scrubbing brush, and returning the empty produce bin to the conveyor. The method further includes spraying a cleaning solution 24 onto the empty produce bins 11 at least when positioned onto the scrubbing brush 20, and collecting the sprayed cleaning solution 24.
In other embodiments, a brush may be moved in and out of the produce bin while it remains on the conveyor. In these embodiments a vacuum may be used to first remove debris from the produce bin as will be appreciated by those skilled in the art. Indeed, many modifications and other embodiments of the invention will come to the mind of one skilled in the art having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the invention is not to be limited to the specific embodiments disclosed, and that modifications and embodiments are intended to be included within the scope of the appended claims.
This application is a continuation of Ser. No. 12/122,343 filed May 16, 2008, now U.S. Pat. No. 7,979,941, the entire disclosure of which is hereby incorporated herein by reference.
| Number | Name | Date | Kind |
|---|---|---|---|
| 1710682 | Brogden | Apr 1929 | A |
| 1883772 | Engholm | Oct 1932 | A |
| 1927721 | Stevens et al. | Sep 1933 | A |
| 2207697 | Kendall | Jul 1940 | A |
| 2889566 | Parks | Jun 1959 | A |
| 2956297 | Edmunds | Oct 1960 | A |
| 3018200 | Huddle | Jan 1962 | A |
| 3040351 | Parks | Jun 1962 | A |
| 3479678 | Jeffreys | Nov 1969 | A |
| 3504390 | Wing | Apr 1970 | A |
| 3733849 | Cantagallo et al. | May 1973 | A |
| 4126910 | Beer | Nov 1978 | A |
| 4160457 | Dickson, Jr. et al. | Jul 1979 | A |
| 4192034 | Knepper, Jr. | Mar 1980 | A |
| 4403364 | Schroeder | Sep 1983 | A |
| 4635312 | Byers | Jan 1987 | A |
| 4805649 | Nezworski | Feb 1989 | A |
| 5371911 | Mullinax | Dec 1994 | A |
| 5425385 | Kuta et al. | Jun 1995 | A |
| 5746233 | Kuroda et al. | May 1998 | A |
| 5957044 | Kravitz | Sep 1999 | A |
| 6336239 | Cooper | Jan 2002 | B1 |
| 6368183 | Trojan et al. | Apr 2002 | B1 |
| 20040031507 | Ross et al. | Feb 2004 | A1 |
| 20050061623 | Schloesser | Mar 2005 | A1 |
| 20080089764 | Vistro | Apr 2008 | A1 |
| Number | Date | Country |
|---|---|---|
| 2829714 | Mar 2003 | FR |
| 6261636 | Sep 1994 | JP |
| 10-43703 | Feb 1998 | JP |
| 11-347507 | Dec 1999 | JP |
| 2003-144370 | May 2003 | JP |
| 9952655 | Oct 1999 | WO |
| Entry |
|---|
| Partial machine translation of JP 11-347507, Dec. 1999. |
| Machine translation of FR 2,829,714, Mar. 2003. |
| Partial machine translation of JP 10-43703, Feb. 17, 1998. |
| Fresh Cut, “Key Technology Acquires Freshline Machines”, Mar. 2005. |
| Durand-Wayland, Inc., “Crate & Bin Handling”, 1934. |
| Salazar Machine & Steel, Inc., “Washer Systems”, downloaded from http:/www.salazarmachine.com/bin.html, pp. 1-2. |
| Salazar Machine & Steel, Inc., “Crate Washer Line”, downloaded from http:/www.salazarmachine.com/cws.html, pp. 1-2. |
| Salazar Machine & Steel, Inc., “Bin Washer GCS © 700 Systems”, downloaded from http:/www.salazarmachine.com/gcs.html, pp. 1-2. |
| Number | Date | Country | |
|---|---|---|---|
| 20110220145 A1 | Sep 2011 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 12122343 | May 2008 | US |
| Child | 13113411 | US |
