Patent Grant
11530074
This invention relates to a material handling pallet and pallet system. More particularly, the invention is for a pallet and pallet system having structure and features which facilitate easier inventory control, management and movement, as well as the movement of such inventory through various stages, including manufacture, storage and transportation.
Further, the present invention relates to the design and implementation of a material handling accessory, which may be in the form of a pallet and pallet system.
According to one aspect of the invention, there is provided a pallet comprising: an upper load supporting surface having a peripheral edge; a lower surface having a peripheral edge, the lower surface having substantially the same dimensions as the upper load supporting surface; a plurality of peripheral supports at or near the peripheral edge of the lower surface and extending substantially upwardly therefrom to the upper load supporting surface so that the upper load supporting surface and the lower surface are spaced from each other and define sides of the pallet; at least one internal support extending upwardly from the lower surface to the upper load supporting surface; each side of the pallet having a first opening and a second opening adjacent to the first opening, each of the first and second openings being defined by the upper load supporting surface, the lower surface, and a pair of peripheral supports; and inclined surfaces on the lower surface.
Preferably, the upper load supporting surface is directly above the lower surface, and spaced therefrom by the peripheral supports. Further, the upper load supporting surface may comprise a grid over at least a portion of its surface. The lower surface may comprise four outer pieces arranged at right angles to each other to form a rectangle, a first transverse piece extending between two opposite outer pieces and a second transverse piece extending between two other opposite outer pieces, the first transverse piece and the second transverse piece crossing and connected to each other at an approximate midpoint of the pallet.
At least some of the peripheral supports may be located at a corner of the pallet, and there may be a center column support extending between the lower surface and the upper load supporting surface, such that the center column support is located at substantially the midpoint between a pair of the peripheral supports.
In one preferred embodiment, the inclined surfaces on the lower surface are formed on the four outer pieces, the first transverse piece, and the second transverse piece, the inclined surfaces being positioned on a travel pathway of a fork lift.
Preferably, the first opening and the second opening have an elongate rectangular configuration, and the upper load bearing supporting surface and the lower surface at the first opening and the second opening have inclined surfaces. There may be an internal column extending between the lower surface and the upper load supporting surface, the internal column having a height so that it maintains the size of the space therebetween and provides additional support to the upper load supporting surface. The upper load bearing surface and the lower surface may be rectangular in shape, and the first opening and the second opening are located in all four of the sides of the pallet. The pallet may be comprised of materials selecting from the group consisting of plastic, wood, metal, or a combination of such materials.
In one embodiment, the first opening and the second opening are of elongate rectangular shape, wherein the corners thereof are beveled, and inclined surfaces are formed surrounding the first opening and the second opening to facilitate ingress and egress of a forklift entering the first opening and the second opening.
The pallet may further comprise an electronic tag programmable with information relating to location, load, and other parameters.
According to a further aspect of the invention, there is provided a method of making a pallet comprising: providing a lower surface; placing an upper load bearing surface over the lower surface such that the lower surface and the upper load bearing surface are spaced from each other, the upper load bearing surface and lower surface forming sidewalls of the pallet; placing peripheral support members between the lower surface and the upper load bearing surface to maintain the spaced relationship, the peripheral support members having sufficient strength to support loads placed on the upper load bearing surface; forming a first opening and a second opening in all of the sidewalls, the first opening and the second opening comprising a travel pathway for the ingress and egress of forks on a forklift machine; and providing ramps or inclined surfaces in the first opening and second opening at least on the lower surface on the travel pathway to facilitate ingress and egress of the forks.
Pallets and similar types of structures and devices are a common platform tool used in product storage and transportation. A pallet is a transport structure which has an upper generally flat receiving surface or platform which supports containers, boxes, and other goods in a stable fashion. The pallet has below the flat receiving surface a space or chamber which is sized and dimensioned to receive the lifting forks of a forklift or other type of vehicle which may be inserted freely in the space to raise and lower the pallet, and effect movement of the pallet and the loads mounted thereon. The forklift vehicle can raise or lower the lifting forks, usually by means of hydraulic operations, at the same time raising or lowering the pallet and the containers thereon. In this way, the forklift vehicle transports or moves the loaded pallet and containers thereon, when raised, between selected designated sites, as the pallet and container combination moves through its stages from manufacture to storage and even to commercial or residential locations thereafter. Upon completion of such an operation, the pallet is once more available for future use to facilitate easier movement of other products or loads.
The pallet is thus a structural foundation of a unit load which facilitates handling and storage efficiencies. Pallets may come in many sizes and shapes, although standard sizes and shapes have evolved into commercial use over time. For example, one standard size pallet may have dimensions which are 48″×40″, but other standard or commonly used sizes may certainly be used according to need and context. Further, custom sized pallets may be created and used for products which may need specialized types of handling.
Containerization of material and product transportation has in fact spurred the use of pallets more than ever because of efficiency, as well as secure material handling. In today's world, pallets can handle a static load of more than several thousand pounds. Materials can be stored and loaded onto pallets, and moved from one different geographical location to another with relative ease. Today, it is estimated that about half a billion pallets are made each year and about two billion pallets are in use across the United States alone.
There are different kinds of pallets based on the application and nature of the containers and products which will be placed on the pallet for storage and transportation. Further, pallets may be made out of many types of materials, or combinations thereof, but most are manufactured from molded plastic resin, extruded plastic, or wood. Combinations of such materials may also be used. Pallets also comes in various sizes such as, as noted above, a standardized 40″×40″, as well as other standard sizes including 40″×48″, 40″×72″ or 40″×96″. While certain pallets may be designed for use in areas which allow automated storage and retrieval, not all pallets can be used in such areas and may not be suitably constructed and configured to be useful where automated storage and retrieval systems may be used.
Pallets used in automated storage and retrieval locations may utilize, for example, an automated guided vehicle (AGV) pallet jack as shown in
In the drawings:
The pallet of the present invention is comprised in whole or in part of plastic, although it may be made of other materials as well such as wood or metal or combinations of such materials, and may include and encompass areas or portions thereof where it may be compatible to use in automated storage and retrieval systems using both AGV's and OPC's, as well as other systems and vehicles, where applicable, utilized in the movement, storage and transportation of material mounted on pallets. Not all pallets currently available in the market are capable of handling or working within these systems with ease, or at all. The design of the pallet in accordance with the present invention is, however, preferably capable of handling these systems. The pallet of the invention may be made by having specific critical dimensions so to be compatible with or within the range of the machine or the type of equipment that is used in the particular system.
An illustration of one embodiment of a pallet in accordance with the present invention is seen in
The AGV and OPC vehicles both have wheels, as seen for example in
The pallet of the present invention, in one embodiment, has features and structure as shown, for example, in
As mentioned earlier, the pallet in accordance with the invention can be used in the retrieval of stored products or boxes. In order to do this, it is necessary that the AGV or the OPC or other vehicle or machine type is able to grab the pallet using its fork. The dimensions of the pallet are therefore critical in order for it to function as intended. This is illustrated in
These areas are preferably configured in such a way that when the forks of the OPC or other conveyor or vehicle component are in the range of the machine, they are able to hold the pallet with its full load. This is one of the unique features of the pallet.
The height distance represented by AB in
The pallet 50 has an upper surface 54, upon which loads may be placed, and a lower surface 56. The upper surface 54 and the lower surface 56 are spaced from each other. Four corner pieces 58, each at a corner of the pallet 50, connect the upper surface 54 to the lower surface 56 of the pallet 50, and have sufficient strength to ensure that the upper surface 54 does not collapse under the weight of any load which is mounted on the upper surface 54. Additionally, intermediate each of the corner pieces 58 there is located a center column 60. There are four such center columns 60, approximately but not necessarily centered between each of the corner pieces 58 on the outside edge of the pallet 50. Each of the center columns 60 also have sufficient strength to provide adequate support and maintain the distance between the upper surface 54 and the lower surface 56 so as to prevent collapsing of the upper surface 54 under the weight of a load which may be mounted thereon. It will be appreciated that pallets 50 may be constructed so as to have different strength characteristics, for use in different situations. Some pallets 50 which are intended to carry only smaller or lighter loads need not necessarily be as strong and robust as other pallets 50 which are intended to carry heavier loads.
The pallet 50, additionally, comprises an internal column 64 for supporting and maintaining the distance between the upper surface 54 and a lower surface 56 of the pallet in the approximate center of the pallet 50.
It will be seen that the upper surface 54 of the pallet 50 is generally continuous and extends over the entire area of the upper surface 54. The upper surface 54 may be of a grid like configuration, providing a substantially continuous surface, but also including a plurality of spaces in the grid like pattern, so that it can effectively support a load which is placed thereon.
The lower surface 56 of the pallet 50 comprises four outer edge pieces 70 (see
Along each side of the pallet 50, there are two side-by-side spaces, namely, a first space 80 and a second space 82. On each side, the first space 80 is between a corner piece 58 and one of the center columns 60, while the second space 82 is between the same center column 60 and an opposing corner piece 58. In a preferred embodiment, each of the first and second spaces 80 and 82 are each of substantially identical dimensions. These dimensions may vary from one pallet 52 another depending upon the type of vehicle, and the forklift of the vehicle, which is intended to engage the pallet 50. However, in practice, they are standard size forklifts and the first and second spaces 80 and 82 will therefore be configured to fit one of these standard sizes.
The spaces 80 and 82 are the openings through which the fork of the vehicle will enter. The center column 60 will typically constitute an abutment surface for the fork and its adjacent parts to prevent the fork from entering the pallet 50 any further.
Each of the spaces 80 and 82 is a generally rectangular shape, and has an upper edge 86 and a lower edge 88. Further, each of the spaces 80 and 82 has a first side edge 90 and a second side edge 92. Each of the corners preferably has a chamfered or beveled portion 96 between the lower edge 88 and the first and second side edges 90 and 92, as well as between the upper edge 86, and the first and second side edges 90 and 92. In a typical transport vehicle for moving loads on pallets, the vehicle will include a pair or bifurcated forks in the front thereof, and each of said pair of forks would be received in one of the spaces 80 and 82.
It will further be seen that ramped or inclined surfaces are provided at various locations on the pallet 50 to facilitate the easier positioning of the transportation vehicle with respect to the pallet 50. As seen in
It will also be noted that the first transverse piece 74, as well as the second transverse piece 76, also have inclined or ramp type edges for improved operation, as described above, so that a vertical wall and sharp edges or corners are not encountered during ingress and egress of the fork.
In preferred embodiments, the pallets have specific measurements, as indicated above, although in terms of overall width, depth and height, many of these measurements may be fairly standard. With respect to the apertures 80 and 82, the invention provides for preferred sizes and dimensions, and some of these specific amounts are provided as set out in
It will be noted that each side of the pallet 50 is configured so as to have the two spaces 80 and 82 so that the forks of the forklift vehicle will have similar access to the pallet 50 from whichever side the vehicle is approaching the pallet, thus rendering to the pallet 50 a convenience of use regardless of relative positions or orientations.
As mentioned, and further described below, each of the pallets 50 may be used in association with an electronic device which will facilitate identification of a specific pallet 50, provide information as to its position or location, and may also be updated and programmed so as to include information about the goods or products which are currently loaded on the pallet 50, providing users with useful and essential information during the course of a period of storage or transportation.
The electronic devices may take different forms, although one preferred embodiment may utilize radio frequency identification devices, typically known as RFID devices. As described further below, these RFID devices associated with the pallet may be active in nature and temporarily accommodated within a specific housing of the pallet 50, such as at 110, or clamped or strapped thereto in a manner which keeps it secure until it needs to be removed. Such an RFID device may typically follow a load from one position or location to another, including its location on pallets 50 during such movements. The electronic devices may also be passive RFID's, wherein they are connected or molded to the pallet in a more permanent manner so as to be a part of the structure, and capable of being programmed electronically with the relevant information as different loads and containers are moved on the pallet. Such electronic devices may also include the necessary power sources, be rechargeable, and be connectable wirelessly such as through Internet routers or Bluetooth, so that the position of the pallet 50 and its load can be more easily determined and followed as it moves through the system.
One embodiment of the pallet and system of the invention therefore provides the pallet of the invention to have the ability to incorporate RFID (radio frequency identification) tags, or other types of identifying or tracking and electronic devices. The loss of pallets and poor inventory management is one of the more significant contributors to lost revenue for any organization in this field. The pallets and systems of the invention are designed to accommodate these tags which will help to overcome the above problem and contribute toward an efficient supply chain process, with better monitoring and tracking capabilities. The use of the RFID tags, therefore, can help to more easily track, monitor and control the location of the pallets throughout the entire supply chain system, as well as potentially the load the pallet is carrying, and other information of interest such as weight and size of the load.
These tags utilized with the pallet system of the invention may come in several options, including as example the following two ways:
(1) Active RFID:
Current methods may comprise the scanning of individual boxes, which are located on the pallet, to identify and process the inventory. But using these RFID tags which are installed on a pallet system, or have mechanisms which enable them to fit on or into the pallet, makes it possible to store all the information of the items loaded on the pallet. The pallet may have a permanent tag fixed thereto, or a dedicated tag may be associated with a pallet for a given load as it moves through the system. Further, both such tags, or a plurality of such tags each for different purposes, may be used if this may improve efficiency and the ability to track pallets and their loads as they move through the system.
(2) Passive RFID
Passive RFID is one which may be molded into the pallet. These are unique RFIDs which need to withstand high heat and pressure. These tags again help to manage the inventory as well as protecting the pallet against any theft. Some of the Passive RFID tags are shown in
Throughout this description, the embodiments and examples shown should be considered as exemplars, rather than limitations on the apparatus and procedures disclosed or claimed. Although many of the examples presented herein involve specific combinations of method acts or system elements, it should be understood that those acts and those elements may be combined in other ways to accomplish the same objectives. Acts, elements and features discussed only in connection with one embodiment are not intended to be excluded from a similar role in other embodiments.
As used herein, “plurality” means two or more. As used herein, a “set” of items may include one or more of such items. As used herein, whether in the written description or the claims, the terms “comprising”, “including”, “carrying”, “having”, “containing”, “involving”, and the like are to be understood to be open-ended, i.e., to mean including but not limited to. Only the transitional phrases “consisting of” and “consisting essentially of”, respectively, are closed or semi-closed transitional phrases with respect to claims. Use of ordinal terms such as “first”, “second”, “third”, etc., in the claims to modify a claim element does not by itself connote any priority, precedence, or order of one claim element over another or the temporal order in which acts of a method are performed, but are used merely as labels to distinguish one claim element having a certain name from another element having a same name (but for use of the ordinal term) to distinguish the claim elements. As used herein, “and/or” means that the listed items are alternatives, but the alternatives also include any combination of the listed items.
This application claims the benefit of U.S. Provisional Patent Application No. 63/027,479 filed on May 20, 2020, the contents of which are incorporated herein by reference in their entirety.
| Number | Name | Date | Kind |
|---|---|---|---|
| 3835792 | Wharton | Sep 1974 | A |
| 3964400 | Brand | Jun 1976 | A |
| 4843976 | Pigott | Jul 1989 | A |
| 5413052 | Breezer | May 1995 | A |
| 6006677 | Apps | Dec 1999 | A |
| 6138582 | Fujii | Oct 2000 | A |
| 6199488 | Favaron | Mar 2001 | B1 |
| 6809703 | Serra | Oct 2004 | B2 |
| 6814287 | Chang | Nov 2004 | B1 |
| 8770115 | Apps | Jul 2014 | B2 |
| 20030061974 | Smyers | Apr 2003 | A1 |
| 20030233963 | Fan | Dec 2003 | A1 |
| 20040216648 | Apps | Nov 2004 | A1 |
| 20050107092 | Charych | May 2005 | A1 |
| 20060212165 | Watanabe | Sep 2006 | A1 |
| 20060254474 | Roth | Nov 2006 | A1 |
| 20080210140 | Valentinsson | Sep 2008 | A1 |
| 20090050029 | Ogburn | Feb 2009 | A1 |
| 20090114129 | Smith | May 2009 | A1 |
| 20100288169 | Du Toit | Nov 2010 | A1 |
| 20110126741 | Sosa Bravo | Jun 2011 | A1 |
| 20120325125 | Apps | Dec 2012 | A1 |
| 20160068302 | Clark | Mar 2016 | A1 |
| 20180141706 | Storteboom | May 2018 | A1 |
| 20180322453 | Lantz | Nov 2018 | A1 |
| 20190168912 | de Bokx | Jun 2019 | A1 |
| 20200031522 | Shawaf | Jan 2020 | A1 |
| 20210188482 | Meiring | Jun 2021 | A1 |
| Number | Date | Country |
|---|---|---|
| 1382533 | Jan 2004 | EP |
| WO-2008047353 | Apr 2008 | WO |
| WO-2010007621 | Jan 2010 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 20210362905 A1 | Nov 2021 | US |
| Number | Date | Country | |
|---|---|---|---|
| 63027479 | May 2020 | US |
