Patent Application
20070005180
This invention relates generally to material handling systems, and more particularly to automated container storage and delivery systems.
Manufacturers, retailers, and distributors must store and deliver great quantities of goods at a time. Many such users have hundreds if not thousands of products. Orders are received from customers and material handling systems must locate inventory and then route inventory necessary to fill the orders to an appropriate location for shipping or delivery. Through-put is a concern as sometimes many thousands of containers per hour must be processed through a single facility. Intelligent control systems have been developed to track customer orders, inventory, and the routing of the inventory necessary to fill the customer orders. Automation is a solution for reducing the amount of manual labor necessary to fill such orders, as manual labor tends to reduce reliability and through-put, and increases costs.
Individual container storage and delivery systems have been developed which are capable of storing multiple stock keeping units (SKUs) of different products and variations in products, such as size, color, quantity, and flavoring. Such systems mechanize the process of filling orders for multiple containers having different SKUs in an efficient and reliable manner. Such systems, however, can require a great deal of floor space and can be costly to install and use.
Grace, U.S. Pat. No. 4,621,745, discloses an individual container storage and delivery system (ICSDS) in which a vertically accumulating storage and retrieval system (VASRS) for containers is loaded at the top of a tower and selectively dispenses at the bottom. The tower has a frame that defines first and second tower sections, each supporting a number of vertically spaced shelf trays which in turn support the containers which are stacked on the trays when loaded. The shelf trays of each tower section face inwardly toward and are staggered relative to each other. Each tray is mounted for pivotal movement about a horizontal axis and is operated so that when a container is dispensed from a bottom shelf tray, each higher tray beginning at the bottom and progressing upward one at a time, pivots to transfer its carton to the upwardly tilted, next lower, empty shelf tray. This process is repeated until each container has been transferred to the next lower shelf tray. As a container is loaded at the top of the tower, the shelf trays are operated to pass the container downwardly in a zig zag fashion from one tray to another until it reaches the highest unloaded shelf tray.
ICSDS systems such as vertically accumulating storage and dispensing apparatus provide an efficient methodology for delivering containers having many different SKUs. However, many customer orders require a few containers having different SKUs, and many containers having the same SKUs. That is, many customer orders require many containers of a few popular SKUs, and then various lesser amounts of containers of less popular SKUs. ICSDS systems deliver the containers-typically under computer control to a conveyor system which conveys the containers to a palletizer. At the palletizer, the containers are placed onto a pallet layer-by-layer. It is a time consuming process to deliver individual containers to the palletizer, and to place these containers onto the pallet, even in a fully automated system.
A material storage and delivery system includes an individual container storage and delivery system (ICSDS). A palletizer places containers from the ICSDS on a pallet. A layer storage and delivery system (LSDS) places full layers of containers on a pallet. A robotic container delivery system (RCDS) places individual containers on a pallet. A conveyor system conveys containers and pallets between the ICSDS, the palletizer, the LSDS, the RCDS, and delivery/shipping.
The ICSDS preferably comprises a vertically accumulating storage and retrieval system. A depalletizer system can be provided for delivering containers to the ICSDS.
The LSDS can include a full layer storage system for storing full layers of containers, and apparatus for taking the full layers of containers and placing the full layers of containers on a pallet. The LSDS can comprise a pallet magazine for delivering empty pallets to a position for receiving the full layers of containers.
A control system is provided for delivering containers and pallets bearing containers between the ICSDS, the palletizer, the LSDS, the RCDS, and shipping or delivery. The control system can receive inventory data and order data. The inventory data preferably comprises container position data in the ICSDS. The control system can determine pallet configurations from the order data. The pallet configurations can comprise the number of full layers of containers having homogeneous SKU's and whether such layers can be provided by the LSDS. The control system, if the number of homogeneous SKU layers in the order is available from the LSDS and exceeds a predetermined threshold, can direct the LSDS to place the requested number of homogeneous SKU layers on a pallet. The control system can direct a pallet having the homogeneous SKU layers to the RCDS and cause the RCDS to place heterogeneous layers of containers on the pallet in addition to the homogeneous SKU layers that were placed on the pallet by the LSDS. The control system can alternatively direct the pallet from the LSDS to the palletizer.
The control system can direct pallets from the palletizer to the RCDS and cause the RCDS to place heterogeneous layers of containers on the pallet. The control system will, if the number of homogeneous layers of containers requested by the order does not exceed the predetermined threshold, cause the ICSDS to deliver an equivalent number of the containers to the palletizer for placement on a pallet.
The control system can determine the number of homogeneous package type layers of containers and, if the number of homogeneous package type layers requested by the order is above a threshold, direct the containers to be sent to the palletizer and, if below a threshold or if the containers are not of homogeneous package type, cause the containers to be sent to the RCDS. If the control system determines that homogeneous SKU layers are also necessary, it can direct the pallet from the palletizer to the LSDS and direct the LSDS to place the homogeneous SKU layers of containers on the pallet. If additional containers are necessary to complete the pallet, the control system directs the pallet to the RCDS to place incomplete layers of containers or containers having heterogeneous package type onto the pallet.
There are shown in the drawings embodiments which are presently preferred, it being understood, however, that the invention is not limited to the precise arrangements and instrumentalities shown, wherein:
This invention is directed to an automated storage and retrieval systems for containers and other products. For instance, in at least one application, the automated storage and retrieval system may be used to store and fill orders for beverages.
A top plan schematic of an automated storage and retrieval system according to the invention is shown in
The term “container” is used herein generally, and can refer to almost any type of goods for which material handling is necessary. The invention is useful for beverage containers and product containers of many different sizes and shapes. The invention is also useful for the handling of containers within containers, as when cans of beverages are provided in packages, and such packages are in provided in cases. The invention can also be used to move goods themselves, where such goods may not be in a container as such.
The ICSDS 10 is capable of storing many individual containers and delivering selected ones of the containers upon demand. Any suitable ICSDS can be used, however, a currently preferred ICSDS includes the vertically accumulating storage and dispensing apparatus described by Grace, U.S. Pat. No. 4,621,745, the disclosure of which is incorporated herein fully by reference. This vertically accumulating storage and retrieval system (VASRS) is currently sold under the trademark VERTIQUE® by Vertique, Inc of Arden, N.C. This system incorporates towers of pivoting, vertically spaced shelf trays which support containers and transport the containers downwardly in zig zag fashion. Thus, this VASRS system is capable of storing individual containers in vertically oriented towers, and then dispensing the goods from the bottom of the tower onto a discharge conveyer. Containers are directed into the top of the towers by a supply conveyor. Suitable diverting or container directing apparatus directs the containers into an appropriate tower. The towers are typically aligned in rows such that one supply conveyor can service a row of towers or, in an alternative embodiment, a bank of towers can have a row of towers on each side of the supply conveyor such that one supply conveyor can service two rows of opposing towers. Similarly, a single discharge conveyor at the bottom of the towers can receive containers from a row of towers or, in the alternative embodiment, from opposing rows of towers on each side of the discharge conveyor.
There are many different VASRS, including those that are pneumatically operated, electronically operated, that have two position trays, and the like. Any such VASRS can be used. Others are also possible. In addition, horizontal accumulating and dispensing systems may be used in the system. Any horizontal accumulating and dispensing system may be used. Further, other ICSDS systems can be used with the invention. Systems such as gravity flow conveyors systems are known for individual container storage and delivery applications. Such systems and others can be used with the invention.
The ICSDS 10 shown in
The bank 26 can be replenished with containers from a pallet storage area 42. Within the pallet storage area 42, there are a plurality of pallet storage positions 46. A gantry 48 removes containers from pallets delivered by a pallet supply conveyor 50, and places the containers on a conveyor line which takes the containers to the supply conveyor 34 and the VASRS bank 26. Not all of the containers will usually be removed from pallets by the gantry 48, as only the number of containers necessary to replenish the towers will be removed. The pallets with the remaining containers are taken by an automated storage and retrieval system (ASRS) 52 to one of the pallet storage positions 46. Containers are taken from the pallet storage area 42 by the ASRS 52 and the gantry 48. The ASRS 52 retrieves the necessary pallet from the appropriate pallet storage position 46 and brings it to the gantry 48. The gantry 48 removes the necessary number of layers of containers from the pallet and places them on a conveyor for delivery to the VASRS bank 26. The ASRS 52 then brings the pallet back to the storage position 46, unless the pallet is empty, in which case the empty pallet is retrieved for reuse. Other pallet storage and retrieval systems can be used with the invention.
The system can operate with any number of ICSDS systems or components that are interconnected with appropriate conveying systems. In the example shown in
Any number of additional VASRS banks can be provided depending on system requirements. Also, the number of towers and the number of tray positions in the towers can be varied. In the example that is shown, additional VASRS banks 90 and 92 are provided and receive containers that are removed from pallets by the gantry 48 and the gantry 86.
The VASRS banks 26, 70, 90 and 92 are fully automated in the example, that is, both the supply and discharge of containers from the banks is controlled entirely by the control system. In cases where the demand for certain containers is relatively low, the expense of a fully automated system for such containers can be partially avoided. In the embodiment shown, a bank 102 of VASRS towers is utilized to discharge containers on demand to a conveyor which carries the containers to the queuing conveyor 60. The VASRS bank 102 is semi-automated and manually replenished with containers whenever a particular tower needs replenishment. The discharge function from each tower is automatic and under the control of the control system. Additional semi-automated banks 104 and 106 can be connected by conveyors to deliver goods through a common conveyor line with the bank 102 to the queuing conveyor system 60. Another semi-automated bank 110 can be connected by a suitable conveyor line to the queuing conveyor system 60. The four fully automated VASRS banks 26, 70, 90 and 92, the connected semi-automated VASRS banks 102, 104, and 106, and the VASRS bank 110 create six lanes of conveyor lines 112 in the queuing conveyor system 60, which then transports the cases to the palletizer 14 by conveyor 38 or other parts of the system by conveyor 114. Other VASRS bank and conveyor configurations are possible.
The palletizer 14 can be of any construction suitable for taking individual containers and loading them onto a pallet as layers. Palletizers currently exist for handling a wide variety of container sizes, shapes, and weights. One suitable palletizer is the PAI 6300 that is manufactured by Production Automation Inc. of Montgomery Ala. The palletizer 14 takes containers that are of a homogeneous package type and forms the layer from individual containers, and then places the formed layers onto a pallet. The homogeneity of containers for a layer depends generally on the containers having substantially the same height, width and length to permit the palletizer to form the layer without individual case placement. At the palletizer the cases are typically oriented in the same direction such that, for example, the long sides of cases are aligned. In addition to case dimensions, it is also preferable that the containers not differ greatly in weight, since the palletizer may require different settings to handle cases of substantially different weight.
Containers of high volume SKUs must be depalletized from supply pallets and re-palletized to a delivery pallet on a frequent basis. For these SKUs, a high throughput system includes a replenishment conveyor system 66. Pallet supply conveyors 95 bring pallets of such high demand SKUs to the gantry 48. Pallet supply conveyors 97 bring pallets of high demand containers to the gantry 86. The gantry 48 and the gantry 86 remove containers from these pallets and deliver them to the replenishment conveyor system 66. The replenishment conveyor system 66 delivers the containers to the merge 62, and the conveyor 38 delivers the containers to the palletizer 14. Pallet stackers 101 store and deliver empty pallets on demand.
The layer storage and delivery system (LSDS) 18 can be of any construction suitable for taking layers of containers and placing them onto a delivery pallet. The LSDS 18 can include a plurality of layer storage positions 94 which can be supply conveyors having thereon pallets with containers. In the usual case, each layer storage position 94 will have only containers with homogeneous SKUs. The term SKU is used herein generally to refer to packages which are viewed to be interchangeable, if not identical. This typically requires that the containers have substantially the same product, in substantially the same quantity, and in substantially the same packaging. It is known to identify containers having only minor distinctions with the same SKU, for example, where different package coloring schemes are presented for aesthetic purposes or as a form of advertisement. If the layers are not homogeneous with respect to SKU, the control system must be able to track which SKUs are in the layers such that the system will be able to determine which containers are being placed onto a delivery pallet, and the order must require all of the containers that are in the non-homogeneous layer. It will be appreciated by those skilled in the art that the invention is not limited to systems using SKUs, so long as the system is capable of identifying containers within the system.
The LSDS 18 includes a suitable mechanical device such as gantry 98 to remove layers from pallets in the layer storage positions 94 and place them onto a delivery pallet. Empty pallets can be delivered to the LSDS 18 by a conveyor 99.
The robotic container delivery system (RCDS) 22 can be any suitable structure capable of placing individual containers onto a pallet in an intelligent, container-by-container process. One suitable device is the Fanuc Robot M-410 iHS of Rochester Hills, Mich. The RCDS 22 takes individual containers and places them onto a delivery pallet in a position best suited to fit the pallet. The RCDS 22 is effective to place containers of a variety of sizes and shapes on top of the full layers that have been placed onto the delivery pallet by the palletizer 14 or the LSDS 18. The RCDS 22 can also place full layers onto a pallet, but the process is generally much slower than the palletizer 14 or the LSDS 18. Containers with heterogeneous package types have different container characteristics such as dimension, shape and weight. The control system must process the container information in order to direct the RCDS 22 as to how to fit the containers onto the pallet. In the example of containers having different container shapes and sizes, this may involve processing to instruct the RCDS 22 how to position and orient the containers so as to fit the available space. The RCDS 22 can also be used to place less than a full layer of containers on the top of a pallet prior to shipment. This incomplete layer can consist of identical containers or different containers. In the example of an incomplete layer, this can include positioning the containers for maximum stability on the pallet. Appropriate computer control can be utilized to fit the containers which must be placed onto the pallet in a manner which fits both the geometry of the containers and the layer.
The RCDS 22 can be supplied with containers by any suitable method. In the present example, containers delivered to the merge 62 can be routed to a conveyor 114 which takes the containers to the RCDS by way of a branching conveyor system 134.
In another embodiment of the invention, the RCDS 22 may be replaced with a hand stacking system 23 for placing individual containers onto a pallet in an intelligent, container-by-container process for maximum use of space on the pallet and for stability during shipping. The hand-stacking station may be an element of the ICSDS 10 where people are used to load a pallet, or other container, with containers, or other items to be shipped. In some applications, the hand stacking system 23 may be less expensive and more effective than the RCDS 22. The hand stacking station 23 may increase the speed by which an order may be filled with the ICSDS 10. For example, the hand stacking station 23 enables one or more containers to be removed from storage and loaded on a pallet for delivery to fill an order. The hand stacking station 23 may receive a pallet for supporting containers. The pallet may move between various locations proximate to the location where an ordered product is stored to reduce fatigue on personnel and to reduce the amount of time necessary to fill the order. In addition, the pallet may be moved vertically to facilitate loading the pallet. For instance, if a pallet is empty or has very little containers on the pallet, the pallet may be raised with a lifting device to a level, such as waist level to a person to facilitate easy, ergonomical loading by personnel. In addition, the pallet may be positioned at a lower level relative to hand stacking personnel to facilitate more efficient hand loading.
Suitable conveying systems are provided to conduct containers and pallets through the system. It will be appreciated that any number of systems capable of moving pallets and containers would be suitable for the invention. A conveyor system 120 can be used to transport pallets between the palletizer 14 and the LSDS 18, the RCDS 22, or the hand stacking system 23. A conveyor system 122 can carry pallets between the LSDS 18 and the RCDS 22 or the hand stacking system 23. A conveyor system 130 can branch from the conveyor 114 and carry urgent deliveries directly to the shipping area. A conveyor system 140 can carry pallets from the RCDS 22 or the hand stacking system 23 to shipping. One or more shrink-wrapping stations 144 can be used to wrap the pallets if desired.
A control system 150 can be provided to control the operation of the system and the movement of containers and pallets through the system. The control system 150 may be a computer system for operating motors and switches to direct containers and pallets through the system by methods known in the art. The control system 150 may have appropriate memory and processing capability to track the location of containers in the material storage and delivery system, and to process this information according to the principles discussed herein to route the containers and pallets to the appropriate places at the appropriate times. Although the control system 150 is shown as a single system, it will be appreciated that one or more computers or programmable logic controllers (PLCs) could be used in tandem to perform the control according to the invention.
A method for processing orders for containers according to the invention is illustrated by the block diagram of
A method according to the invention is illustrated in
The method progresses from step 220 or step 260 to step 300 (
The method then determines in step 320 whether full layers of homogeneous package type are required. Such containers are provided by the ICSDS in step 325 and are formed into layers and placed onto a pallet by the palletizer in step 327. The system determines in step 329 if the order requires heterogeneous package type containers or an incomplete layer. The system progresses to the RCDS in step 335 or the hand stacking system 23 in step 336 if such are necessary. The RCDS 22 or the hand stacking system 23 places heterogeneous package types or incomplete layers of containers on the pallet in step 335, 336, respectively. The heterogeneous package types can comprise layers having differing SKUs, or container size, shape or weight. The RCDS 22 or the hand stacking system 23 is adapted to individually place these containers onto the pallet in a manner which best fits the pallet. The completed pallet is then sent to a finish step 340, which can be the shipping step in which the pallet is placed into a delivery truck or container for transport to the required destination. The finish step 340 can include such steps known in the art as wrapping or banding the pallet prior to shipping.
In step 320, if it is determined that full layers of homogeneous package type are not necessary, it is determined in step 345 if heterogeneous package types or incomplete layers are necessary. If so, these are supplied by the RCDS in step 350 or the hand stacking system 23 in step 351, after which the method progresses to the finish step 340.
If it is determined in step 300 that full layers of homogeneous package type are not necessary, it is determined at step 355 if full layers of homogeneous package type are necessary. If so, the order is sent to the ICSDS at step 360 and the containers are palletized by the palletizer 14 in step 365. It is determined at step 370 whether heterogeneous package types or incomplete layers are required to finish the order. If so, such are supplied by the RCDS at step 375 or by the hand stacking system 23 at step 376 and the method proceeds to the finish step 340. If a determination is made at step 370 that heterogeneous package types or incomplete layers are not necessary, the method proceeds to the finish step 340. If at step 355 it is determined that full layers of homogeneous package type are not necessary, the method proceeds to step 380 or step 381 and remaining containers are supplied by the RCDS 22 or the hand stacking system 23, respectively, and the method then proceeds to the finish step 340.
An alternative embodiment of the invention is shown in the top plan schematic shown in
Containers leaving the depalletizer 440 are unscrambled by an unscrambler 460 and sent by a conveyor 464 to the VASRS towers 416419. The conveyor 464 connects to branching conveyors 468 which connect to the supply conveyors 472 which supply the containers to the top of the VASRS banks 416-419. A conveyor 476 can bypass the VASRS banks 416419 and transport containers directly to the palletizer 480.
Containers leaving the fully automated VASRS banks 416419 and semi-automated VASRS banks 432, 436 are transported to queuing conveyors 490, 494 until needed at the palletizer 480. The queuing conveyors 490 merge to a palletizer supply conveyor 498 which transports the containers to the palletizer 480. The queuing conveyors 494 merge to a supply conveyor 502 which transports the containers to the manual palletizing area 510. A branch 506 carries urgently needed containers directly to shipping area 534.
Pallets leaving the palletizer 480 are directed by a pallet conveyor 508 to a manual palletizing area 510. Individual containers are received from branch conveyor 518 and are lowered to the floor by suitable structure such as VASRS towers 522. There the containers are manually placed onto pallets. The pallets can then be passed to wrapping station 526. Pallet conveyor 530 transports the pallets to shipping area 534 to be loaded onto trucks 536. Pallet conveyor 538 transports pallets to shipping area 542.
Pallets are delivered to the depalletizer through a pallet que conveyor 544. Pallets leaving the depalletizer 440 through pallet discharge conveyors 546, 548 can be stored in pallet storage area 550. The pallet storage area 550 has a plurality of pallet storage positions 554. The pallets with the remaining containers are taken by an automated storage and retrieval system (ASRS) 558 to one of the pallet storage positions 554. Containers are taken from the pallet storage area 550 by the ASRS 558 to the gantry depalletizer 440. The ASRS 558 retrieves the necessary pallet from the appropriate pallet storage position 554 and brings it to the depalletizer 440. The depalletizer 440 removes the necessary number of layers of containers from the pallet and places them on a conveyor for delivery to the VASRS banks 416-419. The ASRS 558 then brings the pallet back to the storage position 554, unless the pallet is empty, in which case the empty pallet is retrieved for reuse.
A control system 556 can coordinate and control all system components to ensure that containers and pallets are routed to suitable locations at the appropriate times. The control system 556 can be a single system as shown, or can be comprised of multiple systems that are communicatively linked.
A semi-automated VASRS tower assembly 600 is shown in
A storage area 630 permits containers 618 to be stored in the immediate vicinity of the respective tower 610 in which the containers 618 are to be loaded. A walkway 634 is provided such that a workman can walk past each of the towers 610 to determine which tower is in need of containers. A signaling means 638 such as a light or a buzzer can provide an indication of when the tower 610 is in need of containers. The workman takes the containers 618 from the storage area 630 and places the containers into top of the respective tower 610. A lower level having a walkway 642 and storage area 646 can be provided to fill shorter towers (not shown), which can be positioned adjacent the taller towers 610, for containers 650 which are in lower demand and thereby need fewer storage spaces. The containers can be placed into the storage areas 630, 646 by any suitable means, but will typically be placed on pallets which are lifted into position by a lift vehicle.
Orders requiring full pallets of homogeneous SKUs can be filled by the container storage and delivery system of the invention. It is usually most efficient to determine if such pallets are available in a storage warehouse and to retrieve these pallets directly from the warehouse, rather than to build such pallets through the system.
In yet another embodiment, as shown in
The VASRS tower 710 may be formed from a plurality of vertically spaced shelf trays 712. The shelf trays 712 support the containers 718 that are stacked on the trays 712 when loaded as shown. The shelf trays 712 face inwardly toward and are staggered relative to each other. The shelf trays 712 are mounted for pivotal movement about a horizontal axis and operated so that when a container 712 is dispensed from a bottom shelf tray 714, the container 718 is carried by ramp 722 onto conveyor 726. Each higher tray beginning at the bottom and progressing upward one at a time, pivots to transfer its container to the upwardly tilted next lower shelf tray 712. As a container 718 is loaded at the top of the tower 710, the shelf trays 712 are operated to pass the container downwardly in zig zag fashion from one shelf tray 712 to another until the container 718 reaches the highest unloaded shelf tray 712. An upper container input location 728 serves as the entry point for containers into the tower 710, and can be a ramp as shown, can be another structure, or can be an open space for placement of containers 718 into the top of the tower 710.
The storage area 730, 731, 732 permit containers 718 to be stored in close proximity to the VASRS tower 710 in which the containers 718 are to be loaded. Walkways 734 may be provided so that workman can walk by each of the towers 710 to determine whether a tower is in need of containers. A signaling means 738 such as audio or visual alarm, such as a light or a buzzer, respectively, may be used to indicate when level of containers in a tower 710 has fallen below a predetermine threshold. The tower 710 may be filled by a workman removing containers 718 from a storage area 730, 731, 732 and placing the containers into the respective tower 710. The containers can be placed into the storage areas 730, 731, 732 by any suitable means, but will typically be placed on pallets which are lifted into position by a lift vehicle.
There is shown in
A high speed pick station 1030 is provided for containers with a higher throughput. The high speed pick station can include a plurality of storage locations 1034. The storage locations 1034 can store containers of a single container type or SKU. In one aspect, the storage locations 1034 are used to store containers exceeding a predetermined volume threshold, the containers that are ordered in the greatest numbers. The threshold can be a predetermined limit, such as the number of cases that are ordered or the ranking of the SKU relative to other SKUs, such as the top 5, 10 or 25 SKUs. The storage locations 1034 can be pallets of containers, other structure for storing the containers or floor space locations for particular container SKUs. The high speed pick station 1030 provides access to the storage locations 1034 for manual retrieval of containers by an operator. A central aisle 1038 or other suitable structure can be provided for this purpose. The term “manual retrieval” refers to the fact that the operator manually lifts, or operates machinery such as a gantry to lift, each container or manually operates equipment such as the lift truck 1042, or other suitable structure such as the Tygard Claw made by Tygard Machine and Manufacturing of Washington, Penn. or other apparatus, such as the layer picker made by Cascade Corporation of Portland Oreg. In each case, the operator must visit each storage location 1034 to retrieve containers. The operator removes containers on demand. The operator builds a pallet with these containers. Pallets from the high speed pick station 1030 can be placed onto a conveyor at a high speed loading area 1050.
The palletizer 1058 receives containers from the individual container storage and delivery systems 1000 and 1002 and forms these containers into layers or partial layers and then places them onto a pallet. The pallet leaves the palletizer 1058 and can be wrapped in a suitable stretch wrap at stretch wrap station 1062. Some pallets may not require wrapping and can bypass the stretch wrap station 1062.
Pallets leaving the palletizer 1058 and high speed load station 1050 may need additional cases. These cases can be provided to an individual container placement station 1070. The individual container placement station 1070 places individual cases onto the top of each pallet as necessary. The individual container placement station 1070 can be a manual station in which an operator receives cases and places them into the pallets manually. Alternatively, mechanical apparatus such as robots can be used to place individual containers onto the pallets at desired locations on the pallet.
The conveyors 1018 and 1026 can deliver containers to either the palletizer 1058 or to the individual container placement station 1070. The path is determined by the number of containers that must be placed onto the pallet. Layers of containers are more efficiently placed onto the pallet at the palletizer 1058. Irregularly sized containers are placed onto the container at the individual container placement station 1070 as these containers may not be formable into a layer by the palletizer 1058.
Slave dispensing system 1060 is used to place slaves into the system. These slaves receive pallets that are sent to the individual container placement station 1070 to receive containers. Full pallets from the warehouse could also be placed into the system at this location.
Cases leaving the individual container placement station 1070 can be wrapped in suitable stretch wrap stations 1074. The containers can then be removed by an operator 1078 to a delivery truck or storage location. One or more transport conveyors 1082 can be provided to carry the pallets to the pallet pick up area. A bypass conveyor 1086 can be provided to carry pallets to the pallet pickup area 1080 that do not require containers to be added at the individual container placement station 1070.
The palletizer 1058 can consist of a single piece of equipment or several pieces of equipment. This equipment can be a conventional top loading palletizer used to form layers. Hand-stack or robotic case placing equipment can be provided for completing pallets at the individual container placement station 1070. Pallet dispensers or stackers are provided to manipulate empty pallets and these pallets can be placed into the system at the pallet loading area 1060.
In operation, the controlling software will determine if full pallets are required and obtain these from the warehouse. If several containers of a high throughput container type or SKU are required, these are obtained from the high speed pick station 1030. Multiple containers of different types are obtained from the individual container storage and delivery system 1000. These containers can be sent to the palletizer 1058, or to the individual container placement station 1070. The individual container storage and delivery system 1000 dispenses a type of container which may be present in the high speed pick station 1030 if the number of containers that are required is below a certain threshold.
A method according to the invention is illustrated in
Individual containers can be sent by the semi-automated individual container storage and delivery system 1132 to a palletizer 1136 by a path 1140, and from the palletizer 1136 to the individual container placement station 1116 by a path 1144. If an insufficient number of cases are necessary to require the palletizer 1136, the cases can be sent to the individual container placement station 1116 by a path 1146. More frequently required container types can be obtained from the high speed pick station 1148 and delivered by a path 1152 to the shipping/staging station 1108 if no additional containers are necessary. In situations where an entire layer of the same package type is needed, a pallet containing an entire layer may be delivered to the palletizer 1136 along path 1151. In some applications, a complete layer may be formed from products having a generally homogenous exterior shape and multiple SKUs. Additional containers can be placed onto the pallet at the individual container placement station 1116 through a path 1156. A fully automated container storage and delivery system 1160 can optionally be used, as indicated by the phantom lines in
In an alternative invention, the high speed pick station may 1030 may be replaced with a gantry 1031 or other mechanized retrieval system. A gantry may be used to retrieve containers and distribute the containers to other systems within the individual container storage and delivery system 1000.
It should be understood that the invention can be utilized with other container transport devices in addition to pallets. The invention can be used with “slave” pallets for conforming various vendor pallets to a conventional size. The invention can also be used with carts which have wheels for rolling.
The invention has been disclosed with reference to an exemplary system shown in the drawings and described in the present specification. It will be appreciated by one skilled in the art, however, that various modifications and rearrangements to the embodiment described herein are possible. The number and particular layout of the various components could be modified for the particular use. The system components are capable of being performed by various different mechanical equipment, both currently in existence and which may come into existence. The present invention provides a system and method which is capable of taking many different specific embodiments, in keeping with the many different container handling uses that are contemplated.
This invention can be embodied in other forms without departing from the spirit of the essential attributes thereof. Accordingly, reference should be had to the following claims, rather than to the foregoing specification, as indicating the scope of the invention.
This is application is a continuation-in-part of U.S. patent application Ser. No. 10/836,543, filed Apr. 30, 2004, which is a continuation-in-part of U.S. patent application Ser. No. 10/098,160, filed Mar. 13, 2002.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 10836543 | Apr 2004 | US |
| Child | 11082076 | Mar 2005 | US |
| Parent | 10098160 | Mar 2002 | US |
| Child | 10836543 | Apr 2004 | US |
