EP1018472B1 - Palletising system - Google Patents
Palletising system Download PDFInfo
- Publication number
- EP1018472B1 EP1018472B1 EP99308967A EP99308967A EP1018472B1 EP 1018472 B1 EP1018472 B1 EP 1018472B1 EP 99308967 A EP99308967 A EP 99308967A EP 99308967 A EP99308967 A EP 99308967A EP 1018472 B1 EP1018472 B1 EP 1018472B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pallet
- tines
- channels
- fork lift
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/12—Platforms; Forks; Other load supporting or gripping members
- B66F9/19—Additional means for facilitating unloading
- B66F9/195—Additional means for facilitating unloading for pushing the load
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D19/0004—Rigid pallets without side walls
- B65D19/0006—Rigid pallets without side walls the load supporting surface being made of a single element
- B65D19/003—Rigid pallets without side walls the load supporting surface being made of a single element forming discontinuous or non-planar contact surfaces
- B65D19/0032—Rigid pallets without side walls the load supporting surface being made of a single element forming discontinuous or non-planar contact surfaces the base surface being made of a single element
- B65D19/0036—Rigid pallets without side walls the load supporting surface being made of a single element forming discontinuous or non-planar contact surfaces the base surface being made of a single element forming discontinuous or non-planar contact surfaces
- B65D19/004—Rigid pallets without side walls the load supporting surface being made of a single element forming discontinuous or non-planar contact surfaces the base surface being made of a single element forming discontinuous or non-planar contact surfaces and each contact surface having a discrete foot-like shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00009—Materials
- B65D2519/00014—Materials for the load supporting surface
- B65D2519/00024—Metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00009—Materials
- B65D2519/00014—Materials for the load supporting surface
- B65D2519/00034—Plastic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00009—Materials
- B65D2519/00014—Materials for the load supporting surface
- B65D2519/00039—Agglomerates, i.e. different materials mixed together
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00009—Materials
- B65D2519/00049—Materials for the base surface
- B65D2519/00059—Metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00009—Materials
- B65D2519/00049—Materials for the base surface
- B65D2519/00069—Plastic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00009—Materials
- B65D2519/00049—Materials for the base surface
- B65D2519/00074—Agglomerates, i.e. different materials mixed together
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00258—Overall construction
- B65D2519/00263—Overall construction of the pallet
- B65D2519/00268—Overall construction of the pallet made of one piece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00258—Overall construction
- B65D2519/00263—Overall construction of the pallet
- B65D2519/00278—Overall construction of the pallet the load supporting surface and the base surface being identical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00258—Overall construction
- B65D2519/00283—Overall construction of the load supporting surface
- B65D2519/00288—Overall construction of the load supporting surface made of one piece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00258—Overall construction
- B65D2519/00313—Overall construction of the base surface
- B65D2519/00318—Overall construction of the base surface made of one piece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00258—Overall construction
- B65D2519/00313—Overall construction of the base surface
- B65D2519/00328—Overall construction of the base surface shape of the contact surface of the base
- B65D2519/00338—Overall construction of the base surface shape of the contact surface of the base contact surface having a discrete foot-like shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00258—Overall construction
- B65D2519/00398—Overall construction reinforcements
- B65D2519/00462—Applied in mold, e.g. bi-injection molded reinforcement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D2519/00004—Details relating to pallets
- B65D2519/00736—Details
- B65D2519/00805—Means for facilitating the removal of the load
Definitions
- the present invention relates to a palletising system for use in the transport and handling of articles or groups of articles.
- the end user must unload the load and its associated pallet from the road trailer or other transport means by which the load is supplied to the end user. Having unloaded the palletised load, the end user must then unpack the load from the pallet. Often, the end user has a large number of such palletised loads in his premises and each load results in an empty pallet which must be removed from the storage area so as not to act as an obstacle to free passage of workmen and machines in the storage area.
- the end user must then return the empty pallet to the manufacturer or face a charge for the loss of that pallet.
- the pallet is handled many times for each delivery of a load to the end user and return to the supplier. This causes wear and tear to the pallet as well as adding cost for the end user.
- US 2,455,197 provides a pallet formed from two corrugated plates. This arrangement permits lifting of the pallet by a fork lift from any of four sides.
- US 4,553,290 provides a fork lift attachment with four laterally displaceable prongs, which enables a reduction in the width of the support plate.
- the invention provides a pallet where the tines can enter passages from all four directions. This is achieved by forming the pallet with two series of passages at right angles to one another so that the tines can enter passages either from either front or back or from either side.
- Two lines of corrugations can be formed in the same sheet of material to give a structure which comprises a sheet member having a series of upraised dimples extending normally to either side of the plane of the sheet, the dimples being laid out on a grid pattern similar to an egg crate design.
- the dimples can be provided by metal or other blocks attached at the desired locations on both sides of a metal sheet, but are preferably formed by a suitable vacuum or other moulding technique in a sheet of plastic material. This structure allows the interlocking of pallets for stacking.
- an end user can unload only the load and not the associated pallet from the flat bed of the road truck or other transport means bringing the load onto his premises. The end user thus does not remove the pallet from the truck, so that the pallet can be returned directly to the supplier without having to be handled on the end user's premises.
- the end user can unload both the pallet and its associated load for storage on site by engaging the tines of the fork lift truck with those channels having a closed top. When the user requires to unpack the load, it can readily be lifted off the pallet and unpacked separately. The unloaded pallet can then be handled by a fork lift truck by inserting the tines of the fork lift truck into the passages which have closed tops.
- the invention thus enables an end user to avoid the need to handle and store empty pallets on site and minimises handling of such pallets as may remain on site.
- the close top channels have open bottoms. This permits access of fork lift tines from below as well as from one side, and reduces the weight of the pallet.
- the pallet of the invention comprises a generally planar load bearing surface which is adapted to receive the load to be carried by the pallet.
- the surface is preferably substantially flat and will typically have a square or rectangular plan shape to mimic the load bearing top surface of a conventional pallet.
- the surface may be a continuous surface, except for the locations at which the open topped channels are positioned.
- the load bearing surface may be provided with underlying support or bracing structures, for example transverse blocks or vertical webs between the side walls of adjacent open topped channels to enhance the strength and rigidity of the pallet.
- a particularly preferred material for use in the manufacture of the pallet of the invention is a moulded polyalkylene polymer sheet, notably a polyethylene or polypropylene sheet. Recycled plastics materials may be used to form the pallet.
- the exact form and thickness of the sheet from which such a pallet is made will depend upon the load which the pallet is to carry. Typically, such a load will be at least 100 kg, usually 500 to 2000 kg, and the sheet can readily be selected from commercially available materials as is known in the industry having regard to the safety and other requirements for pallets to carry such a load.
- load bearing is therefore used herein in respect of the pallet of the invention to denote that it can support a load of at least 100 kg, preferably at least 2000 kg.
- the invention has been described above in terms of a load bearing surface having open topped channels. However, it may be desired to provide such channels with hinged top members which pivot about their longitudinal edges to provide a closed top to the channel, but pivot upwardly to allow a tine located in the underlying channel to pivot the top members aside as the tine rises out of the channel.
- the top member may be formed as two opposed half tops, each pivoted to an opposed edge of the lip of the channel to reduce the height of the flap which is formed as the top members are pivoted upwardly by the rising tine.
- Such top members may be desirable where the pallet is to carry a fluent material contained within a flexible walled bag as opposed to a rigid container or series of rigid articles in a box or shrunk wrapped to form a unitary load.
- the movable tine or tines of the fork lift permit adjustment of the effective number of tines. For example, two tines can become one, or three tines can become one. This means that the fork lift truck can pick up pallets of different sizes. Adjacent tines may be interlocked together to form a single lifting structure. The tines may be moved laterally by any suitable means, for example by means of hydraulics.
- the tines of the fork lift may be provided as an attachment which is mounted on a suitable vehicle. Accordingly, another aspect of the invention provides an attachment for the rise and fall mechanism of a fork lift truck or the front end loader of a tractor as specified in claim 7.
- the pallet shown in Figure 1 comprises a sheet member 1 which has been formed into corrugations 2, some of which have an open top 3, and intermediate ones which have a closed top but an open bottom face 4.
- a sheet is made by casting a polyethylene resin about metal rod or glass fibre reinforcement.
- the plan dimensions of the pallet are typically 0.5 to 1.5 metres wide and 1 to 2 metres front to back.
- the pallet is typically from 5 to 10 cm deep vertically and the corrugations are typically from 4 to 9 cm deep and from 5 to 10 cm wide.
- a load 5 is placed upon the top face of the pallet.
- a pair of tines 10 of a fork lift truck are inserted into a pair of the closed top channels 4. When the tines are raised, they engage the closed top of the channel and lift the pallet and load with them. If the tines are placed in a pair of open topped channels 3 (as shown by 10') raising the tines brings them into direct contact with the base of the load 5 so as to lift the load without lifting the pallet.
- the fork lift mechanism can have more than two tines, for example as many as seven or eight, so as to increase and spread the effective load bearing and stiffening surface of the tines. The user can thus handle the load and pallet together or can separate the load from the pallet.
- the unloaded pallet can thus remain upon the flat bed of the road or rail truck in which it is supplied to the end user for return to the supplier without the need for the end user to handle the pallet. The wear and tear damage to the pallet during handling is thus minimised.
- the pallet shown in Figures 2-4 comprises a sheet of reinforced plastic or metal 20 having a plurality of dimples 21, 22 formed therein on a grid pattern.
- the dimples 21 extend above the plane of the sheet, and the dimples 22 extend below the plane of the sheet in the manner of an egg box.
- the dimples provide crossing channels 3, 4 on each side of the sheet so that the tines of the fork lift truck can enter from any one of the four sides of the pallet.
- the dimples on the underside of the sheet form channels with closed tops, those on the upper face of the sheet forming open topped channels. When a tine is inserted into the channel between dimples on the lower face of the sheet, it will raise both the sheet and any load carried on the upper ends of the dimples on the top face of the sheet.
- tops of the upper dimples 21 form a generally planar load carrying surface which in this example has a greater area than the bottoms of the lower dimples 22.
- the pallet has between three and ten channels, preferably in each direction.
- FIG. 5 shows an attachment for the front end loader of a tractor or for fitting to the rise and fall mechanism of a fork lift truck.
- This attachment comprises a support frame 30 which has mounting hooks 31 for mounting the attachment on a fork lift carriage.
- the support frame 30 carries a series of laterally spaced apart projecting tines 10, the number and spacing of which can be selected to suit the spacing of the channels 3 and 4 in the pallet. Eight tines are illustrated, but the number is preferably between four and eight.
- the two outermost tines 10 are mounted slidably to the frame 30 and can be moved laterally towards or away from their neighbouring tines by hydraulic rams. Each outermost tine can be brought up into contact with its neighbour so that they interlock to form a single load bearing member which can fit into a single channel 3, 4.
- the effective number of tines can therefore be adjusted between 6, 7 and 8 depending on the number of channels in the pallet to be engaged.
- Other tines could also be laterally movable to allow the attachment to accommodate different channel spacings and to square up the machine or a pallet mounted on the tines 10. Examples of tines which are engaged with each other are shown in Figure 8.
- Figure 8a illustrates generally circular section tines 10a, 10b interlocking
- Figures 8b and 8c illustrate interlocking of, respectively, three tines 10c, 10d, 10e and two tines 10f and 10g to form effectively single larger tines.
- the frame 30 can carry a pusher mechanism 33 which is actuated by an hydraulic ram 32 or the like to engage with the load 5 on the pallet so that it can be pushed off the tines 10 when it has been raised off the pallet and onto a suitable storage or work surface, as illustrated in Figures 6 and 7.
- the pusher mechanism 33 may be connected to the frame 30 by a straight linkage or a pivoted linkage 35, via a pivot point 40.
- Figure 7 also shows an optional pallet engaging member 34 which can be used to grab an empty pallet and pull it onto the tines 10 of the fork lift.
- the pallet engaging member 34 is a hook which held in place in a dimple 22 in the pallet by a releasable latch mechanism, for example hydraulic, mechanical or electronic.
- the latch mechanism is provided by a spring and hydraulically activated pin.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Pallets (AREA)
- Valve Device For Special Equipments (AREA)
- Loading Or Unloading Of Vehicles (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
Description
- The present invention relates to a palletising system for use in the transport and handling of articles or groups of articles.
- Many loads of articles or groups of articles are handled upon pallets using a forklift truck. Whilst such an arrangement may simplify handling of the load at the manufacturer's premises and in subsequent transport to the end user and storage at the end user's premises, such pallets often represent a nuisance to the end user.
- Firstly, the end user must unload the load and its associated pallet from the road trailer or other transport means by which the load is supplied to the end user. Having unloaded the palletised load, the end user must then unpack the load from the pallet. Often, the end user has a large number of such palletised loads in his premises and each load results in an empty pallet which must be removed from the storage area so as not to act as an obstacle to free passage of workmen and machines in the storage area.
- Secondly, having unloaded the pallet and having provided storage for the empty pallet, the end user must then return the empty pallet to the manufacturer or face a charge for the loss of that pallet. As a result, the pallet is handled many times for each delivery of a load to the end user and return to the supplier. This causes wear and tear to the pallet as well as adding cost for the end user.
- Despite these disadvantages in the use of pallets, they are the commonly accepted and used method for handling loads.
- Previous attempts to improve the above technology include US Patent Numbers 2,455,197 and 4,533,290. US 2,455,197 provides a pallet formed from two corrugated plates. This arrangement permits lifting of the pallet by a fork lift from any of four sides. US 4,553,290 provides a fork lift attachment with four laterally displaceable prongs, which enables a reduction in the width of the support plate.
- According to one aspect of the present invention there is provided a palletising system as specified in
claim 1. - The invention provides a pallet where the tines can enter passages from all four directions. This is achieved by forming the pallet with two series of passages at right angles to one another so that the tines can enter passages either from either front or back or from either side. Two lines of corrugations can be formed in the same sheet of material to give a structure which comprises a sheet member having a series of upraised dimples extending normally to either side of the plane of the sheet, the dimples being laid out on a grid pattern similar to an egg crate design. The dimples can be provided by metal or other blocks attached at the desired locations on both sides of a metal sheet, but are preferably formed by a suitable vacuum or other moulding technique in a sheet of plastic material. This structure allows the interlocking of pallets for stacking.
- By providing open topped channels in the load bearing pallet, an end user can unload only the load and not the associated pallet from the flat bed of the road truck or other transport means bringing the load onto his premises. The end user thus does not remove the pallet from the truck, so that the pallet can be returned directly to the supplier without having to be handled on the end user's premises. Alternatively, the end user can unload both the pallet and its associated load for storage on site by engaging the tines of the fork lift truck with those channels having a closed top. When the user requires to unpack the load, it can readily be lifted off the pallet and unpacked separately. The unloaded pallet can then be handled by a fork lift truck by inserting the tines of the fork lift truck into the passages which have closed tops. The invention thus enables an end user to avoid the need to handle and store empty pallets on site and minimises handling of such pallets as may remain on site.
- It is preferred that the close top channels have open bottoms. This permits access of fork lift tines from below as well as from one side, and reduces the weight of the pallet.
- The pallet of the invention comprises a generally planar load bearing surface which is adapted to receive the load to be carried by the pallet. The surface is preferably substantially flat and will typically have a square or rectangular plan shape to mimic the load bearing top surface of a conventional pallet. The surface may be a continuous surface, except for the locations at which the open topped channels are positioned.
- The load bearing surface may be provided with underlying support or bracing structures, for example transverse blocks or vertical webs between the side walls of adjacent open topped channels to enhance the strength and rigidity of the pallet.
- A particularly preferred material for use in the manufacture of the pallet of the invention is a moulded polyalkylene polymer sheet, notably a polyethylene or polypropylene sheet. Recycled plastics materials may be used to form the pallet.
- The exact form and thickness of the sheet from which such a pallet is made will depend upon the load which the pallet is to carry. Typically, such a load will be at least 100 kg, usually 500 to 2000 kg, and the sheet can readily be selected from commercially available materials as is known in the industry having regard to the safety and other requirements for pallets to carry such a load.
- The term load bearing is therefore used herein in respect of the pallet of the invention to denote that it can support a load of at least 100 kg, preferably at least 2000 kg.
- The invention has been described above in terms of a load bearing surface having open topped channels. However, it may be desired to provide such channels with hinged top members which pivot about their longitudinal edges to provide a closed top to the channel, but pivot upwardly to allow a tine located in the underlying channel to pivot the top members aside as the tine rises out of the channel. If desired, the top member may be formed as two opposed half tops, each pivoted to an opposed edge of the lip of the channel to reduce the height of the flap which is formed as the top members are pivoted upwardly by the rising tine. Such top members may be desirable where the pallet is to carry a fluent material contained within a flexible walled bag as opposed to a rigid container or series of rigid articles in a box or shrunk wrapped to form a unitary load.
- The movable tine or tines of the fork lift permit adjustment of the effective number of tines. For example, two tines can become one, or three tines can become one. This means that the fork lift truck can pick up pallets of different sizes. Adjacent tines may be interlocked together to form a single lifting structure. The tines may be moved laterally by any suitable means, for example by means of hydraulics. The tines of the fork lift may be provided as an attachment which is mounted on a suitable vehicle. Accordingly, another aspect of the invention provides an attachment for the rise and fall mechanism of a fork lift truck or the front end loader of a tractor as specified in claim 7.
- Although the pallet and the fork lift form the system, these items could also be manufactured and sold separately, and could be used separately. Accordingly, another aspect of the invention provides a pallet as specified in claim 9.
- The invention will now be further described by way of illustration, with reference to the following drawings in which:
- Figure 1 is a diagrammatic cross sectional view through one form of a pallet in accordance one aspect of the invention;
- Figure 2 is a plan view of another embodiment of a pallet in accordance with the invention;
- Figure 3 is a side elevational view of the pallet shown in Figure 2;
- Figure 4 is a perspective view of part of the pallet shown in Figure 2;
- Figure 5 is a side elevational view of an attachment for a fork lift in accordance with another aspect of the invention;
- Figure 6 illustrates diagrammatically an alternative attachment for a fork lift truck;
- Figure 7 is a diagrammatic illustration of another alternative attachment for a fork lift truck; and
- Figure 8 shows side elevational views of interlocking tines of differing sectional shapes in accordance with another aspect of the invention.
-
- The pallet shown in Figure 1 comprises a
sheet member 1 which has been formed into corrugations 2, some of which have anopen top 3, and intermediate ones which have a closed top but anopen bottom face 4. Typically, such a sheet is made by casting a polyethylene resin about metal rod or glass fibre reinforcement. The plan dimensions of the pallet are typically 0.5 to 1.5 metres wide and 1 to 2 metres front to back. The pallet is typically from 5 to 10 cm deep vertically and the corrugations are typically from 4 to 9 cm deep and from 5 to 10 cm wide. - In use, a
load 5 is placed upon the top face of the pallet. A pair oftines 10 of a fork lift truck are inserted into a pair of the closedtop channels 4. When the tines are raised, they engage the closed top of the channel and lift the pallet and load with them. If the tines are placed in a pair of open topped channels 3 (as shown by 10') raising the tines brings them into direct contact with the base of theload 5 so as to lift the load without lifting the pallet. If desired the fork lift mechanism can have more than two tines, for example as many as seven or eight, so as to increase and spread the effective load bearing and stiffening surface of the tines. The user can thus handle the load and pallet together or can separate the load from the pallet. The unloaded pallet can thus remain upon the flat bed of the road or rail truck in which it is supplied to the end user for return to the supplier without the need for the end user to handle the pallet. The wear and tear damage to the pallet during handling is thus minimised. - The pallet shown in Figures 2-4 comprises a sheet of reinforced plastic or
metal 20 having a plurality ofdimples dimples 21 extend above the plane of the sheet, and thedimples 22 extend below the plane of the sheet in the manner of an egg box. The dimples providecrossing channels - The tops of the
upper dimples 21 form a generally planar load carrying surface which in this example has a greater area than the bottoms of thelower dimples 22. - Six channels are illustrated here, allowing access from all four side directions. Preferably the pallet has between three and ten channels, preferably in each direction.
- Figure 5 shows an attachment for the front end loader of a tractor or for fitting to the rise and fall mechanism of a fork lift truck. This attachment comprises a
support frame 30 which has mountinghooks 31 for mounting the attachment on a fork lift carriage. Thesupport frame 30 carries a series of laterally spaced apart projectingtines 10, the number and spacing of which can be selected to suit the spacing of thechannels outermost tines 10 are mounted slidably to theframe 30 and can be moved laterally towards or away from their neighbouring tines by hydraulic rams. Each outermost tine can be brought up into contact with its neighbour so that they interlock to form a single load bearing member which can fit into asingle channel tines 10. Examples of tines which are engaged with each other are shown in Figure 8. Figure 8a illustrates generally circular section tines 10a, 10b interlocking, and Figures 8b and 8c illustrate interlocking of, respectively, three tines 10c, 10d, 10e and two tines 10f and 10g to form effectively single larger tines. - If desired, the
frame 30 can carry apusher mechanism 33 which is actuated by anhydraulic ram 32 or the like to engage with theload 5 on the pallet so that it can be pushed off thetines 10 when it has been raised off the pallet and onto a suitable storage or work surface, as illustrated in Figures 6 and 7. Thepusher mechanism 33 may be connected to theframe 30 by a straight linkage or a pivotedlinkage 35, via apivot point 40. Figure 7 also shows an optionalpallet engaging member 34 which can be used to grab an empty pallet and pull it onto thetines 10 of the fork lift. Thepallet engaging member 34 is a hook which held in place in adimple 22 in the pallet by a releasable latch mechanism, for example hydraulic, mechanical or electronic. In this example the latch mechanism is provided by a spring and hydraulically activated pin.
Claims (11)
- A palletising system for use in the transport and handling of articles or groups of articles (5), comprising at least one pallet (1, 20) and a fork lift;
the or each pallet (1, 20) comprising a load bearing generally planar surface and a structure located beneath the plane of the surface having a plurality of channels (3, 4) therein to receive the tines (10) of a fork lift truck whereby the pallet (1, 20) and its associated load (5) can be handled by the fork lift, the pallet (1, 20) having alternating closed (4) and open (3) top channels in the structure underlying the load bearing surface, the open top channels (3) permitting tines (10) of a fork lift truck when located in at least some of those channels (3) to engage the base of a load (5) carried upon the pallet directly so that the load can be lifted free from the pallet, and the close top channels (4) permitting tines (10) of a fork lift truck when located in at least some of those channels (4) to engage the top of the channels to raise the pallet and any load carried on the pallet, wherein the pallet has a structure similar to an egg crate, with the open top channels (3) being defined between upwardly projecting dimples (21), and the closed top channels (4) being defined between downwardly projecting dimples (22), such that said fork lift tines may be inserted from any of four sides of the pallet to allow either lifting of the load from the pallet or lifting of the pallet and any load carried on the pallet;
the fork lift comprising a plurality of laterally spaced apart tines (10) for engaging in channels (3, 4) of the pallet, and means for raising and lowering the tines; wherein at least one of the tines (10) is laterally moveable towards an adjacent tine, the said movable tine (10) and the said adjacent tine (10) are interlockable so that when the said tines (10) are brought together they interlock to form a single lifting structure which may be inserted into a single channel (3, 4) in the pallet (1, 20). - A palletising system as claimed in claim 1, wherein the pallet is a moulded plastics material.
- A palletising system as claimed in claim 1 or claim 2 wherein at least some of the close top channels (4) are open at the bottom.
- A palletising system as claimed in any one of the preceding claims, wherein at least one of the open top channels (3) is provided with a hinged top member which can pivot about a hinge to provide a closed top to the channel (3).
- A palletising system as claimed in any one of the preceding claims, wherein the laterally spaced apart tines (10) are mounted on an attachment (30) for the front end loader of a tractor or the fall and rise mechanism of a fork lift truck.
- A palletising system as claimed in any one of the preceding claims, wherein the fork lift has between four and eight tines (10), the two outermost tines being laterally adjustable so that each can be brought into close proximity or engagement with its neighbour whereby the effective number of tines can be reduced by one or two.
- An attachment (30) for the front end loader of a tractor or the fall and rise mechanism of a fork lift truck, to provide a fork lift suitable for use in the system of claim 1, the attachment comprising a frame (30) which has a plurality of laterally spaced apart projecting tines (10), at least one of the tines being laterally moveable towards and away from an adjacent tine (10), the said movable tine (10) and the said adjacent tine (10) are interlockable so that when the said tines (10) are brought together they interlock to form a single lifting structure.
- An attachment (30) as claimed in claim 7, further including pallet engaging means (33) for engaging with a surface of a pallet to enable the pallet to be pulled on to the tines (10) of the attachment.
- A pallet (1, 20) suitable for use in the palletising system of claim 1, comprising a load bearing generally planar surface and a structure located beneath the plane of the surface having a plurality of channels (3, 4) therein to receive the tines (10) of a fork lift truck whereby the pallet (1, 20) and any associated load (5) can be handled by the fork lift, the pallet (1, 20) having alternating closed (4) and open (3) top channels in the structure underlying the load bearing surface, the open top channels (3) permitting tines (10) of a fork lift truck when located in at least some of those channels (3) to engage the base of a load (5) carried upon the pallet directly so that the load can be lifted free from the pallet, and the close top channels (4) permitting tines (10) of a fork lift truck when located in at least some of those channels (4) to engage the top of the channels to raise the pallet and any load carried on the pallet; characterized in that the pallet has a structure similar to an egg crate, with the open top channels (3) being defined between upwardly projecting dimples (21), and the closed top channels (4) being defined between downwardly projecting dimples (22) such that said fork lift tines may be inserted from any of four sides of the pallet to allow either lifting of the load from the pallet or lifting of the pallet and any load carried on the pallet.
- A pallet as claimed in claim 9, wherein at least some of the close top channels (4) are open at the bottom.
- A pallet as claimed in claim 9 or claim 10, comprising a moulded plastics material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9824615 | 1998-11-10 | ||
GBGB9824615.0A GB9824615D0 (en) | 1998-11-10 | 1998-11-10 | Device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1018472A1 EP1018472A1 (en) | 2000-07-12 |
EP1018472B1 true EP1018472B1 (en) | 2003-05-21 |
Family
ID=10842181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99308967A Expired - Lifetime EP1018472B1 (en) | 1998-11-10 | 1999-11-10 | Palletising system |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1018472B1 (en) |
AT (1) | ATE240873T1 (en) |
DE (1) | DE69908077D1 (en) |
GB (1) | GB9824615D0 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201021484D0 (en) * | 2010-12-18 | 2011-02-02 | Frost Hugh | Improvements in or relating to load handling apparatus |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2455197A (en) * | 1946-05-09 | 1948-11-30 | Gen Motors Corp | Material supporting pallet |
DE3301595C2 (en) * | 1983-01-19 | 1985-01-31 | Hans H. Meyer GmbH Maschinenbau, 3320 Salzgitter | Attachment for mobile forklifts in the form of a fork positioner with sideshift and four prongs |
SE465033B (en) * | 1989-11-21 | 1991-07-15 | Skellefteaa Staalteknik | MANUAL MANUFACTURER MOUNTED FOR CONNECTING WITH A WORKING MACHINE |
NZ255246A (en) * | 1992-09-17 | 1995-12-21 | Sixty Fifth Calejero Pty Ltd | Steel pallet: load bearing panel sandwiched between interfitting top and base panels |
-
1998
- 1998-11-10 GB GBGB9824615.0A patent/GB9824615D0/en not_active Ceased
-
1999
- 1999-11-10 AT AT99308967T patent/ATE240873T1/en not_active IP Right Cessation
- 1999-11-10 DE DE69908077T patent/DE69908077D1/en not_active Expired - Lifetime
- 1999-11-10 EP EP99308967A patent/EP1018472B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69908077D1 (en) | 2003-06-26 |
ATE240873T1 (en) | 2003-06-15 |
EP1018472A1 (en) | 2000-07-12 |
GB9824615D0 (en) | 1999-01-06 |
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