WO2010148426A1

WO2010148426A1 - Waste transfer apparatus

Info

Publication number: WO2010148426A1
Application number: PCT/AU2010/000754
Authority: WO
Inventors: Scott Brian Prior; Kevin Adrian Stewart
Original assignee: Smart Load Pty Ltd
Priority date: 2009-06-25
Filing date: 2010-06-20
Publication date: 2010-12-29
Also published as: AU2009100618A4; AU2010265830A1; AU2009100618B4

Abstract

A waste transfer apparatus comprises a loading receptacle mounted on a base at ground level and an articulating mechanism mounted on the base which lifts and tilts the receptacle to transfer waste into a pit.

Description

WASTE TRANSFER APPARATUw

FIELD OF THE INVENTION

This invention relates to waste transfer apparatus and in particular to apparatus for use in waste transfer stations.

BACKGROUND OF THE INVENTION

Waste transfer stations provide a facility where solid waste can be taken to be stored and sorted prior.to being transferred to another location for treatment, recycling or landfill. Waste transfer stations were introduced in an attempt to increase the amount of waste that is recycled and thereby to reduce the amount of waste that is disposed via landfill sites. These facilities have also been used in remote or rural areas where no landfill sites exist.

Generally there are four methods employed for waste recovery including a flat floor facility, push pit, open top bins and direct deposit into transfer container/truck. There are important operational and safety issues of concern with each type of transfer facility.

Flat floor transfer stations require the user to deposit their waste directly onto the floor of the transfer site. The waste is then sorted manually by staff and transferred to the appropriate treatment facility. This type of facility does not allow for optimum compaction and storage of waste. Furthermore, in a flat floor site the users are not separated from the waste which is both a health and safety risk to users and requires staff to maintain a high level of supervision.

More commonly, waste transfer facilities employ a method which allows a user to deposit their waste directly into the storage pit or container thereby separating users from the waste and providing a more efficient means for compaction and storage of waste. One such facility is a push pit whereby users can drop waste directly into a pit for sorting.

Transfer stations using open top bins or trucks have a cavity in the floor which houses the bin or truck into which the user drops their waste. The main hazard involved with these facilities is the risk of users falling into the residual waste pits or bins. Commonly, guard rails and fences have been used around the edge of the pits to prevent users from falling. However, the user must lift their waste over the guard rail which can easily result in injury.

An alternative solution is disclosed in NZ509996 (A) in which the pit or bin is sealed with a retractable cover. This cover is adapted to receive the waste and when retracted allows the waste to fall into the pit. However the user is still at risk of falling into the pit when the cover is retracted.

Alternatively, a mechanical tray can be used to tip the waste into the pit or bin. There are several different trays that have been used in waste transfer stations including a waist height tray which tilts to deposit the waste into the bin. This requires that the waste be lifted onto the tray which can result in lifting injuries.

Ground level trays have been used to prevent these injuries but are not as safe as they remain open at the back of the tray and do not completely safeguard the user from falling into the pit. Furthermore, these trays are prone to tipping over and generally require fixtures to secure them in place and as such cannot be easily removed for repair or re-location.

OBJECT OF THE INVENTION

It is therefore an object of the present invention to provide a waste transfer apparatus, which overcomes the disadvantages and limitations of prior waste delivery methods or at least to provide a useful alternative. STATEMENT OF THE INVENTION

According to the present invention a waste transfer apparatus comprises a loading receptacle mounted on a base at ground level and an articulating mechanism mounted on the base which lifts and tilts the receptacle to transfer waste into a pit.

Preferably the receptacle is formed as a flexible belt stretching between arms of the articulating mechanism which reach to the front of the base.

Preferably the apparatus is adapted to maintain its centre of gravity within its base during transfer of a load of waste.

Preferably the articulating mechanism is driven by one or more hydraulic struts.

Preferably the flexible belt is rotated upwards by the articulating mechanism and wraps around a raised horizontal bar mounted on the base to empty the waste.

Preferably the base contains liquid spill from the belt.

Alternatively the loading receptacle comprises a bin pivoted to the base and the articulating mechanism comprises one or more hydraulic rams which rotate the bjn upwards about the pivot points to empty the waste.

Preferably twin bins are mounted beside each other.

Preferably the apparatus is surrounded by a safety fence and entry to the receptacle is through a safety door which must be closed before the apparatus is operated.

Preferably the apparatus is operated remotely. BRIEF DESCRIPTION OF THE DRAWINGS

An embodiment of the invention is now described by way of example only with reference to the accompanying drawings in which:

Fig 1 is a perspective view of a waste transfer apparatus with the transfer belt in the loading position

Fig 2 is a side elevation of the waste transfer apparatus of Fig 1

Fig 3 is a side elevation of the waste transfer apparatus with the belt midway through its tipping movement and

Fig 4 is a side elevation of the waste transfer apparatus with the belt in the emptied position

Fig 5 is a side elevation of a waste transfer apparatus with an alternative belt arrangement in the loading position Fig 6 is a side elevation of the apparatus in Fig 5 with the belt midway through its tipping movement

Fig 7 is a side elevation of the apparatus in Fig 5 with the belt in the emptied position

Fig B is a rear perspective view of the apparatus corresponding to Fig 6 Fig 9 is a perspective view of an alternative twin bin apparatus

Fig 10 is a side elevation of the apparatus of Fig 9 and

Fig 11 is an underside perspective view of one bin in the raised emptying position.

DETAILED DESCRIPTION OF THE INVENTION

In Fig 1 and Fig 2 waste transfer apparatus 1 has belt 2 made from a durable and flexible material reaching between arms 9. Belt 2 is in the loading position on the ground which allows for easy transfer of waste. Plate 3 beneath belt 2 forms a base for apparatus 1 and contains any liquid that leaks from the waste. Guards 4 on either side of belt 2 contain the waste during the tipping operation and belt 2 is also surrounded by a safety fence with an entry gate (not shown). Safety screen 5 ensures that users cannot enter the waste disposal pit when belt 2 is in the loading position.

After the waste is loaded onto belt 2 tipping is activated remotely from control box 6 which operates hydraulic struts 7. Struts 7 rotate arms 9 upwards and scissor linkage 8 also allows struts 7 to rise upwards thus lifting and tilting belt 2 as shown in Fig 3. As arms 9 continue to rotate screen 5 is pushed upwards out of the way by links 10 and belt 2 wraps around bar 11 thus emptying the waste into the bin as shown in Fig 4.

Fig 5 shows an alternative transfer belt arrangement in which hydraulic struts 12 pivot about fixed points 13 and attach to arms 9 via brackets 14. When struts 12 are activated arms 9 rotate upwards and belt 2 wraps around bar 15 as shown in Fig 6 and Fig 8. The lower section of belt 2 then drops as shown in Fig 7 thus emptying the waste into the bin.

In Fig 9 an alternative embodiment of the invention has twin bins 20 pivoted to frames 21 mounted on the ground so that flaps 27 which are hinged to the front of bins 20 rest on the ground in the loading position. Entry to bins 20 is through roller doors 26 which close automatically when bins 20 are being raised. Safety rails 25 restrict entry from the sides.

Figs 10 and 11 show one bin 20 being emptied into receptacle 24. Hydraulic rams 22 are activated as roller door 26 closes and bin 20 is rotated upwards about pivot points 23 on frame 21. After waste is emptied hydraulic rams 22 are deactivated and bin 20 returns to the loading position under its own weight. .ADVANTAGES

Waste transfer apparatus 1 is constructed to maintain its centre of gravity when loaded within its supporting base during operation and so does not require fixing to the ground. Further it is of lightweight construction and is easily transported by trailer allowing removal of the system for relocation and maintenance.

Accordingly it will be obvious that transfer apparatus 1 allows easy transfer of waste onto belt 2 at ground level and so minimises lifting injuries. Belt 2 is flanked on either side by guards 4 to contain the waste during transfer. The safety fence ensures that users cannot enter during operation.

Further the system can only be operated from remote control box 6 when the gate of the safety fence is closed. The twin bin alternative embodiment of the invention allows dual operation in safety and so doubles the waste transfer capacity of the apparatus.

VARIATIONS

It will be realized that the foregoing has been given by way of illustrative example only and that all other modifications and variations as would be apparent to persons skilled in the art are deemed to fall within the broad scope and ambit of the invention as herein set forth. Throughout the description and claims of this specification the words "comprise" and variations of that word such as "comprises" and "comprising" are not intended to exclude other additives components integers or steps.

Claims

1. A waste transfer apparatus comprising a loading receptacle mounted on a base at ground level and an articulating mechanism mounted on the base which lifts and tilts the receptacle to transfer waste into a pit.

2. The apparatus of claim 1 in which the receptacle is formed as a flexible belt stretching between arms of the articulating mechanism which reach to the front of the base.

3. The apparatus of claim 2 which is adapted to maintain its centre of gravity within its base during transfer of a load of waste.

4. The apparatus of claim 2 in which the articulating mechanism is driven by one or more hydraulic struts.

5. The apparatus of claim 2 in which the flexible belt is rotated upwards by the articulating mechanism and wraps around a raised horizontal bar mounted on the base to empty the waste.

6. The apparatus of claim 2 in which the base contains liquid spill from the belt.

7. The apparatus of claim 1 in which the loading receptacle comprises a bin pivoted to the base and the articulating mechanism comprises one or more hydraulic rams which rotate the bin upwards about the pivot points to empty the waste

8. The apparatus of claim 7 in which twin bins are mounted beside each other.

9. The apparatus of daim 1 which is surrounded by a safety fence and entry to the receptacle is through a safety door which must be closed before the apparatus is operated.

10. The apparatus of claim 1 which is operated remotely.