SYSTEM AND METHOD FOR LOADING PRODUCE TRAYS
A system to load trays of produce into a shipping container includes a container positioning mechanism that positions a container in a precise location within the where holes in the bottom of the container are aligned with a plurality of lift rods. The lift rods rise up the container holes to receive a loaded tray of produce onto the top of the lift rods. After receiving the first tray of produce, the lift rods lower slightly so that a second tray of produce may be loaded on top of the first. With each loaded tray of produce, the lift rods retract further until all trays of produce have been received. As the lift rods slowly retract, the trays of produce are gently lowered into the shipping container. The system has a simple mechanism to reposition the container guide assembly and tray feed assembly to accommodate multiple types of shipping containers.
1. Field of the Invention
The present invention is directed generally to a loading machine and, more particularly, to a system and method for loading produce trays into a shipping container.
2. Description of the Related Art
Shipping containers for perishable products, such as apples, generally contain a series of stiff paper pulp trays with indentations where each indentation contains an individual piece of produce (e.g., an apple). With current technology, these produce trays are loaded and shipped down an assembly line where produce workers must manually remove each loaded produce tray from the assembly line and manually load it into a shipping container. The shipping containers typically contain a number of produce trays laid on top of each other.
This labor-intensive and back-breaking process may lead to produce damage if the tray is dropped while being manually inserting into the shipping container. In addition, if the trays are sloppily loaded into the shipping container, they may be dropped several inches thus causing damage to the produce. Therefore, it can be appreciated that there is a significant need for a system and method for automatically loading produce trays into a shipping container. The present invention provides this, and other advantages, as will be apparent from the following detailed description and accompanying figures.
The present disclosure is directed to a machine and techniques for automatically loading trays of produce into shipping containers. The disclosure is embodied in a system 100, illustrated in
The system 100 includes a container feed assembly 110. A reference arrow 112 indicates direction of movement of a container 114 into the system 100. Although not illustrated in
The system 100 also includes a container positioning assembly 120. The container positioning assembly 120 comprises a left guide assembly 124 (see
Also illustrated in
The left guide assembly 124 is moved back and forth in the direction of movement 132 by a left guide positioning assembly 134. Similarly, the right guide assembly 126 is moved back and forth in the direction of movement 132 by the right guide positioning assembly 136. The left guide positioning assembly 134 is mounted to the left support member 128 by a mounting bracket 144. Similarly, the right guide positioning assembly 136 is mounted to the right support member 130 by a mounting bracket 146.
Both the left and right guide positioning assemblies 134-136 utilize an air cylinder 138 that is fixedly mounted to a guide block 142. The pistons of the air cylinders 138 are mounted to the left and right guide assemblies 124-126, respectively. In addition, guide shafts 140 extend through the guide block 142 and also attach to the left and right guide assemblies 124-126. The guide shafts 140 provide torsional rigidity and structural support to hold the weight of the left and right guide assemblies 124-126 and components mounted thereon.
The air cylinder 138 is a commercially available product and has two air supply inlets. For the sake of clarity, the air supply inlets and air tubing is not illustrated herein. However, the operation of air cylinders is well known in the art and need not be explained in great detail. When air is supplied to one of the air inlets, the piston extends from the air cylinder 138. Conversely, when air is supplied to the other of the air inlets, the piston is forced back into the body of the air cylinder 138.
In operation, air is supplied to the first air inlet on the air cylinders 138 to extend the pistons and move the left and right guide assemblies 124-126 towards each other in the direction of movement 132 to thereby compress and retain the container 114 (see
While both the left and right guide assemblies 124-126 may be moved towards each other to compress and retain the container 114 (see
The system 100 is advantageously designed to operate with a plurality of different shipping containers 114. Those skilled in the art will appreciate that a standard shipping container (see
Alternatively, the system 100 can accommodate European standard shipping containers, illustrated in
In yet another embodiment, containers 114 are manufactured from plastic and are reusable. The reusable plastic containers are sometimes referred to as a rigid plastic container (RPC), illustrated in
The holes 246 in the bottom portion 240 of the shipping container 114 in
Those skilled in the art will also appreciate that there are fewer holes 246 in the bottom portion 240 of the containers 114 in
The dimensions of the cardboard shipping container and the RPC are different and the size of the trays that fit in the different sized containers is also different. Specifically, the standard cardboard shipping container is 12″×20″×12″ and typically contains five trays positioned on top of each other. Trays for the standard cardboard shipping container are 12″×19″ and have a number of indentations to accommodate individual pieces of produce, such as apples. The trays are traditionally manufactured from paper pulp and contained a series of indentations or pockets. However, the produce trays may be manufactured from recycled paper products, styrofoam, or any other suitable material. The system 100 is not limited by the type of material used to make the trays. The trays may be generically referred to herein as produce trays, fruit trays, or simply trays. Each pocket is designed to hold an individual piece of produce, such as an apple, peach, pear, or the like. The system 100 is not limited by the particular produce item contained in the trays or shipped in the containers 114. The trays are intended to “nest” inside each other within the container 114. To accommodate such nesting, the industry utilizes two different types of trays, commonly identified as an “A tray” and a “B tray.” The system 100 automatically loads an A tray first into the container 114 followed by a B tray. The system 100 alternates between an A tray and a B tray to provide the proper nesting within the container 114.
In contrast, the European standard container 114 and RPC is 24″×15.5″×8″ and is designed to accommodate approximately 2-3 trays. A tray configured for shipping in an RPC is 23″×15.″ although not critical to an understanding of the system 100, those skilled in the art will appreciate that each tray may be configured to hold a variable number of pieces of produce. For example, the standard shipping container can accommodate from 48 to 216 pieces of produce depending on the size of the produce with each 12″×19″ tray carrying a number of pieces of produce to accommodate the overall load. Similarly, the European RPC container 114 can accommodate from 18 to 49 pieces of produce distributed over multiple trays. As will be described in detail below, the system 100 detects the presence of a tray of produce and detects the type of tray (i.e., an A tray or a B tray) to assure that the proper tray type is inserted into the container 114.
To accommodate the three different types of containers 114, the system 100 includes a simple switch (not shown) in the controller 104 that is set to select either a standard shipping container, a European container, or an RPC. Generally speaking, the selection of container type occurs only once during a set up of a loading run and is not changed during the loading process. Similarly, the selection of trays to accommodate a selected number of pieces of produce occurs only during the set up of the loading run and is not changed during the loading process. For example, the selection of a standard shipping container and a standard tray accommodating 48 pieces of produce would occur only during the set up.
When the container selection switch is switched from one position to another, the air cylinders 138 adjust to different positions to accommodate the newly selected container type. Thus, the air cylinders 138 adjust initially to a width to accommodate the selected container type. During the loading operation, the air cylinders 138 operate in the manner discussed above to alternately position and retain the container 114 in the load position and to retract and release the container after loading has been completed.
In operation, the system 100 initially has no container 114. The empty container 114 is delivered to the system via a conventional conveyor (not shown) as previously discussed. The container feed assembly 110 receives the empty container 114 onto the container conveyor 116 (see
The interruption of the light from the photo sensor assembly 150 also triggers other activities within the system 100. Within the container positioning assembly 120, air cylinder 138 for the left guide assembly 124 and/or the air cylinder 138 for the right guide assembly 126 are activated to extend the guide assemblies toward each other in the direction of movement 132 perpendicular to the direction of movement 112 to thereby position the container 114. This action further positions the container 114 accurately within the system 100.
The interruption of the light from the photo sensor assembly 150 also triggers additional air valves in the controller 104 (see
As discussed above, the system 100 can accommodate standard cardboard shipping containers (see
In addition, if the container 114 is a standard cardboard shipping container or a European container, the system 100 includes a detainer 160 that extends from the left guide assembly 124 and/or the right guide assembly 126. The detainer 160 contains a sharp edge to penetrate only the lid portion 242 of the cardboard shipping container 114 (see
The system 100 also includes the tray feed assembly 170 to receive loaded trays of produce. Operational details of the tray feed assembly 170 are illustrated in
The tray conveyor belt 174 delivers the loaded tray onto a tray cart 178. The tray cart 178 has four wheels 180 that move back and forth in grooves 182 (see
As illustrated in
A proximity photo sensor assembly (not shown) is also mounted on the frame assembly 102 in alignment with the apertures 196. The photo proximity detectors are used to determine the tray type present on the spatula 192. Those skilled in the art will appreciate that an A tray contains pockets in the extreme corners of the tray. In contrast, a B type tray contains no pocket in that location and thus will not have any product in that location. When a loaded A tray is delivered onto the spatula 192, the proximity photo sensor aligned with the aperture 196 will detect the presence of produce in the corner locations and generate a signal to indicate that loaded tray is an A tray. On the other hand, if a B tray is delivered on to the spatula 192 no produce will be present in that location and the proximity photo sensors will generate a signal indicating the presence of a B tray. In this manner, the system 100 can test to make sure that the proper tray types are delivered to the container 114. It is a customary practice in industry that the first tray loaded into the container 114 is an A tray. This is followed by alternating B trays and A trays until the container is fully loaded.
When the first tray for a container 114 is delivered to the tray lift assembly 170, the photo sensor assembly aligned with the apertures 194 detect the presence of the loaded tray on the spatula 192 and turn off the tray conveyor motor 176. The photo sensor assembly aligned with the apertures 196 determines the tray type in the manner described above. If the tray type is correct (i.e., an A tray for the first tray in the container), the PLC activates the tray position cylinder 184 to push the tray cart 178 away from the tray conveyor belt 174. If the proximity photo sensor aligned with the aperture 196 detects an incorrect tray (i.e., an A tray when a B tray is expected or vice versa) the tray position cylinder 184 will not be activated. Instead, the PLC in the controller 104 (see
As the tray cart 178 moves away from the tray conveyor belt 174, the loaded tray encounters a back stop assembly 200. The back stop assembly 200 includes a vertical back stop plate 202. The bottom of the back stop plate 202 is positioned just above the spatula 192. The spatula 192 is sized to fit under the back stop plate 202. However, the loaded tray of produce cannot fit under the back stop plate 202 and essentially slides off of the spatula 192 as the spatula slides underneath the back stop plate. With the spatula 192 fully withdrawn, the loaded tray of produce drops down into the open container 114 positioned below the tray feed assembly 170. The loaded tray is not dropped directly into the container 114, but is gently placed onto the tray lift assembly 250 in a manner that will be described in greater detail below. Thus, the tray feed assembly 170 receives a loaded tray of produce and gently deposits it on to the tray lift assembly 250.
A light curtain assembly 206 (see
As noted above, the system 100 is capable of operation with standard cardboard shipping containers, as well as the European standard container and RPC. To accommodate the varying size of shipping trays, the tray feed assembly 170 has adjustments that are controlled by the container selection switch (not shown) in the controller 104. The backstop assembly 200 is adjusted to accommodate the larger trays and the larger size of the container 114. An air cylinder 208 is fixedly mounted to a guide block 212. The guide block 212 is mounted on a mounting flange 216 of bracket 218. The bracket 218 is coupled to the frame assembly 102 (see
The tray feed assembly 170 also includes tray guides 220 that bend outwardly in the region approximate the tray conveyor belt 174 to guide the loaded trays off of the tray conveyor belt and on to the spatula 192. To accommodate trays for different container types (i.e., the standard shipping container, the European container, and the RPC), the separation between the tray guides 220 is adjustable.
The back stop plate 202 and the tray guides 220 of the tray feed assembly 170 position the loaded tray directly above the container 114 (see
The lift rods 252 are fixedly attached at one end to the rod mounting plate 254. The opposite or free end of the lift rods 252 are inserted through a guide plate 256 to guide the lift rods in their upward movement and to provide structural support for the lift rods. The guide plate 256 is mounted to the frame assembly 102 (see
In one embodiment, all lift rods 252 are equal in length. In an alternative embodiment, illustrated in
In yet another alternative embodiment, the lift rods 252 may be longer only at the region near the input to the system 100 and the exit of the system. This will cause the loaded tray to sag in only one dimension.
The process of positioning the container precisely at the load position in the system 100 has already been discussed in detail above with respect to the container positioning assembly 120 (see
The rod mounting plate 254 is slideably coupled to a lift support assembly 270. As best seen in
A tray lift motor 280 and gear box 282 provide the operational power for the tray lift assembly 250. As best seen in
The drive shaft 290 is also coupled to a transfer sprocket 298 by a transfer chain 300. The transfer sprocket 298 and transfer chain 300 are part of a mechanism to transfer power to the lift sprocket 292, lift chain 294, and pulley 296 on the opposite side of the lift support assembly 270. The transfer sprocket 298 is mounted to a transfer driveshaft 302 for rotation therewith. The transfer driveshaft 302 is supported in the middle by a center support bearing 302. At its far end, the transfer driveshaft 302 is coupled to a corresponding transfer sprocket 298 and transfer chain 300 on the opposite side of the lift support assembly 270. Thus, the lift support assembly 270 includes a lift chain 294 on each side of the rod mounting plate 154 to assure smooth movement of the rod mounting plate.
In another aspect of the system 100, it has been determined that the loading time for a standard shipping container can be reduced if the bottom portion 240 (see
When the standard shipping container 114 is in the load position within the system 100, the PLC in the controller 104 activates the box lift cylinder 312 to raise the box lift platform 310, as illustrated in
Following the raising of the box lift platform 310, or in conjunction therewith, the tray lift motor 280 is activated in a rotational direction to raise the rod mounting plate 254 and lift rods 252 to rise up to receive loaded trays of produce from the tray feed assembly 170 (see
In operation, the lift rods 252 are brought into position just below the spatula 192 (see
As described above, the light curtain assembly 206 detects the presence of a tray of produce just below the tray feed assembly 170. As the rod mounting plate 154 is lowered, the tray of produce no longer interrupts the light beams of the light curtain assembly 206. This triggers the PLC in the controller 104 to stop the tray lift motor 280. Thus, the tray lift assembly 250 is in a position to receive the next loaded tray of produce.
This process continues until all trays of produce have been loaded into the container 114. When the final tray of produce has been loaded into the container, the PLC in the controller 104 activates the tray lift motor 280 to completely lower the rod mounting plate 254 such that the lift rods 252 are completely disengaged from the container 114. The PLC also activates air valves to retract the piston 314 of the box lift cylinder 312 to thereby lower the box lift platform 310. When the box lift platform 310 is in its resting position, the bottom portion 240 of the container 114 is now resting on the container conveyor 116.
The PLC in the controller 104 activates the air cylinders associated with the detainers 160 to withdraw the detainers from the lid portion 242 of the container 114. In conjunction therewith, the air valves are also activated to withdraw the stops 148 in the direction of movement 149 so that the pathway for the loaded container 114 is clear. In addition, the retainer air cylinder 152 is also activated in the linear direction of movement 148 to release the container 114. The retainer air cylinder 152 is also activated in the rotational direction of movement 156 to withdraw the tang 154 from the container pathway. In addition, the left guide assembly 124 and/or the right guide assembly 126 are also retracted so that the loaded container 114 may freely exit the system 100.
Following the release of the container in the manner described above, the container feed assembly 110 is activated such that the container conveyor 116 conveys the loaded container 114 in the direction of movement 112 to exit the system.
Operation of the system 100 to load the European container 114 (see
When the tray cart 178 has moved away from the tray conveyor belt 174, the spatula 192 moves beneath the backstop 202, as illustrated in
With the tray 320a supported on the lift rods 252, the PLC in the controller 104 activates the tray lift motor 280 (see
The container loading process from an RPC is similar in most respects to that described above. However, with an RPC, the detainer 160 (see
Thus, the system 100 fully automates the tray loading process and is uniquely designed to accommodate multiple types of shipping containers. Although the shipping containers described herein are the standard cardboard shipping container, the European standard container, and the RPC, those skilled in the art will appreciate that accommodation of other container types would only require reconfiguration of the adjustments of the various components described above. Those adjustments are within the scope of knowledge of one of ordinary skill in the art. Accordingly, the system 100 is not limited by the specific container types described herein.
The foregoing described embodiments depict different components contained within, or connected with, different other components. It is to be understood that such depicted architectures are merely exemplary, and that in fact many other architectures can be implemented which achieve the same functionality. In a conceptual sense, any arrangement of components to achieve the same functionality is effectively “associated” such that the desired functionality is achieved. Hence, any two components herein combined to achieve a particular functionality can be seen as “associated with” each other such that the desired functionality is achieved, irrespective of architectures or intermedial components. Likewise, any two components so associated can also be viewed as being “operably connected”, or “operably coupled”, to each other to achieve the desired functionality.
While particular embodiments of the present invention have been shown and described, it will be obvious to those skilled in the art that, based upon the teachings herein, changes and modifications may be made without departing from this invention and its broader aspects and, therefore, the appended claims are to encompass within their scope all such changes and modifications as are within the true spirit and scope of this invention. Furthermore, it is to be understood that the invention is solely defined by the appended claims. It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations).
Accordingly, the invention is not limited except as by the appended claims.
Claims
1. A tray loading system comprising:
- a conveyor mechanism to receive an empty shipping container at an entryway to the loading system;
- a detector mechanism configured to detect the arrival of the empty shipping container at a predetermined load position in the loading system and to generate an indicator signal to indicate the arrival of the empty shipping container at the load position;
- a stop mechanism to halt progress of the shipping container at the load position in the loading system;
- a tray lift assembly positioned beneath the load position and configured to extend a plurality of lift elements through corresponding apertures in a bottom of the shipping container to a predetermined position within the shipping container; and
- a tray receiving mechanism positioned above the load position and having a flat member portion, the tray receiving mechanism having a first operational position to receive a loaded tray such that the flat member portion is under the loaded tray and a second operational position wherein the flat member portion is withdrawn from under the loaded tray such that the loaded tray is fully supported by the plurality of lift elements;
- wherein the plurality of lift elements are retracted to thereby lower the loaded tray into the shipping container.
2. The system of claim 1 wherein the shipping container is a shipping container type selected from a plurality of shipping container types having different dimensions, the system further comprising a controller configured to adjust the tray receiving mechanism to accommodate the selected container type.
3. The system of claim 2 wherein the selected container type is a cardboard shipping container having a first set of predetermined dimensions, the controller being configured to adjust the tray receiving mechanism to accommodate trays corresponding to the cardboard shipping container.
4. The system of claim 3 wherein the stop mechanism comprises first and second stop members, the controller activating the first stop mechanism when the selected container type is a cardboard shipping container.
5. The system of claim 2 wherein the selected container type is a rigid plastic container (RPC) shipping container having a second set of predetermined dimensions, the controller being configured to adjust the tray receiving mechanism to accommodate trays corresponding to the RPC shipping container.
6. The system of claim 5 wherein the stop mechanism comprises first and second stop members, the controller activating the second stop mechanism when the selected container type is an RPC shipping container.
7. The system of claim 2 wherein the selected container type is a European shipping container having a second set of predetermined dimensions, the controller being configured to adjust the tray receiving mechanism to accommodate trays corresponding to the European shipping container.
8. The system of claim 7 wherein the stop mechanism comprises first and second stop members, the controller activating the second stop mechanism when the selected container type is a European shipping container.
9. The system of claim 1 further comprising a bottom support plate positioned beneath the load position to support a bottom portion of the shipping container while at the load position.
10. The system of claim 9 for use with a shipping container having an inner box and an outer lid wherein the bottom support plate is slideably mounted and configured to raise the inner box to a predetermined elevation while at the load position.
11. The system of claim 9 wherein the container guide assembly comprises left and right guide members and at least one of the left and right guide members further comprises a detainer edge configured to extend from the guide assembly and engage the outer lid of the shipping container to retain the outer lid in a stationary position while the inner box container is raised to the predetermined elevation.
12. The system of claim 1, further comprising a container guide assembly configured to adjust the lateral position of the shipping container in response to the generation of the indicator signal from the detector mechanism.
13. The system of claim 12 wherein the container guide assembly comprises left and right guide members wherein at least one of the left and right guide members is configured to move horizontally to engage and retain the shipping container at the load position.
14. The system of claim 13 wherein the stop member engages a leading side of the shipping container and at least one of the left and right guide members further comprises a retainer tang to extend from the guide member on a trailing side of the shipping container opposite the leading side of the shipping container to engage the trailing edge of the shipping container and retain the shipping container at the load position.
15. The system of claim 12 wherein the shipping container is a shipping container type selected from a plurality of shipping container types having different dimensions, the system further comprising a controller configured to adjust the guide assembly to accommodate the plurality of shipping container types.
16. A tray loading system comprising:
- a detector mechanism configured to detect the arrival of an empty shipping container at a predetermined load position in the system;
- a stop mechanism to halt progress of the shipping container at the load position;
- a tray lift assembly positioned beneath the load position and configured to extend a plurality of lift elements through corresponding apertures in a bottom of the shipping container to a predetermined position within the shipping container; and
- a tray receiving mechanism positioned above the load position and configured to receive a loaded tray and to deposit the loaded tray onto at least a portion of the plurality of lift elements wherein the plurality of lift elements are retracted to thereby lower the loaded tray into the shipping container.
17. The system of claim 16 wherein the shipping container is a shipping container type selected from a plurality of shipping container types having different dimensions, the system further comprising a controller configured to adjust the tray lift assembly and the tray receiving mechanism to accommodate the selected container type.
18. The system of claim 17 wherein the shipping container is a shipping container type selected from a plurality of shipping container types comprising a standard shipping container, a European shipping container, and a rigid plastic container.
19. The system of claim 16, further comprising a container guide assembly configured to adjust the lateral position of the shipping container to thereby position the empty container at the load position.
20. The system of claim 19 wherein the container guide assembly comprises left and right guide members wherein at least one of the left and right guide members is configured to move horizontally to engage and retain the shipping container at the load position.
21. The system of claim 19 wherein the shipping container is a shipping container type selected from a plurality of shipping container types having different dimensions, the system further comprising a controller configured to adjust the guide assembly to accommodate the plurality of shipping container types.
22. A tray loading system comprising:
- a first mode of operation used for a first shipping container type having a first set of dimensions;
- a second mode of operation used for a second shipping container type having a second set of dimensions different from the first set of dimensions;
- a detector mechanism configured to detect the arrival of an empty shipping container of the first shipping container type at a first predetermined load position in the loading system when operating in the first mode of operation and to detect the arrival of the empty shipping container of the second shipping container type at a second predetermined load position in the loading system when operating in the second mode of operation;
- a stop mechanism to halt progress of the shipping container of the first shipping container type at the first load position when operating in the first mode of operation and to halt progress of the shipping container of the second shipping container type at the second load position when operating in the second mode of operation;
- a tray lift assembly positioned beneath the load position and configured to extend a plurality of lift elements through corresponding apertures in a bottom of the shipping container to a first predetermined position within the shipping container of the first shipping container type when operating in the first mode of operation and to extend the plurality of lift elements through corresponding apertures in a bottom of the shipping container to a second predetermined position within the shipping container of the second shipping container type when operating in the second mode of operation; and
- a tray receiving mechanism positioned above the load position configured to receive a first tray type when operating in the first mode of operation, the tray receiving mechanism being reconfigured to receive a second tray type when operating in the second mode of operation, the tray receiving mechanism being configured to receive a loaded tray and to position the loaded tray over the shipping container, the tray receiving mechanism being configured to retract and thereby deposit the loaded tray onto the plurality of lift elements such that the loaded tray is fully supported by the plurality of lift elements.
23. The system of claim 22 wherein the first shipping container type is a cardboard shipping container having an inner box and an outer lid.
24. The system of claim 22 wherein the second shipping container type is a rigid plastic container (RPC) shipping container.
25. The system of claim 22, further comprising a container guide assembly configured to adjust the lateral position of the shipping container of the first shipping container type at the first load position when operating in the first mode of operation and to adjust the lateral position of the shipping container of the second shipping container type at the second load position when operating in the second mode of operation.
26. A tray loading method comprising:
- positioning an empty shipping container at a load position such that a plurality of apertures in the bottom of the shipping container are positioned above a plurality of lift elements;
- raising the plurality of lift elements through the apertures in the bottom of the shipping container to a position near a top of the shipping container;
- depositing a loaded tray onto the plurality of lift elements; and
- lowering the plurality of lift elements to thereby deposit the loaded tray into the shipping container.
27. The method of claim 26 wherein the plurality of lift elements are lowered partially so that the top of the loaded tray is in the position proximate the top of the shipping container, the method further comprising:
- depositing an additional loaded tray onto the top of the deposited loaded tray; and
- lowering the plurality of lift elements to thereby deposit the additional loaded tray into the shipping container.
28. The method of claim 26 wherein the plurality of lift elements are lowered partially so that the top of the loaded tray is in the position near the top of the shipping container, the method further comprising:
- depositing an additional loaded tray onto the top of the deposited loaded tray;
- lowering the plurality of lift elements to thereby deposit the additional loaded tray into the shipping container; and
- repeating depositing the additional loaded tray and lowering the plurality of lift elements.
29. The method of claim 26 wherein the shipping container is a shipping container type selected from a plurality of shipping container types having different dimensions, the method further comprising adjusting the load position to accommodate the selected container type, and adjusting raising the plurality of lift elements through the apertures in the bottom of the shipping container to a position near a top of the shipping container to accommodate the selected container type.
30. The method of claim 26 wherein depositing the loaded tray onto the plurality of lift elements comprises receiving a loaded tray onto a tray feed mechanism such that the tray feed mechanism supports the loaded tray, and moving the tray feed mechanism so that the loaded tray is transferred from the tray feed mechanism onto the plurality of lift elements.
31. The method of claim 30 wherein the shipping container is a shipping container type selected from a plurality of shipping container types having different dimensions, the method further comprising adjusting the tray feed assembly to accommodate trays corresponding to the selected container type.
32. The method of claim 26 wherein positioning the shipping container at the load position comprises adjusting a lateral position of the shipping container with a guide assembly to thereby position the empty container at the load position.
33. The method of claim 32 wherein the shipping container is a shipping container type selected from a plurality of shipping container types having different dimensions, the method further comprising adjusting the guide assembly to accommodate the dimensions corresponding to the selected container type.
Type: Application
Filed: Aug 26, 2010
Publication Date: Mar 1, 2012
Inventor: Gary G. Germunson (Yakima, WA)
Application Number: 12/869,012
International Classification: B65B 35/30 (20060101); B65D 88/00 (20060101);