Patent Application
20070012202
Compaction of loose material is desirable in many industries and for many different reasons. Generally the process includes some form of a confining volume into which the material is deposited with a subsequent mechanical means of decreasing that volume.
In a particular application, that of waste management, the confining volume may take the form of an elongate generally rectangular section container having a moveable urging structure at one end. Waste matter is introduced into the container following which hydraulic rams cause the urging structure to be moved along a part of the length of the container, driving the material into a compacted mass against a discharge gate. Once compacted, the mass may be ejected from the forward end of the container structure by a further movement of the rams, for example into a transport vehicle.
A feature of such compaction systems is the need for very long hydraulic rams. These then have to be of telescopic multi stage construction and of large diameter to ensure sufficient power towards the end of the compaction stroke, where the load tends to a maximum. These requirements in turn demand very large hydraulic power systems making compactors of this type very expensive and generally beyond the reach of small isolated communities.
Generally the discharge of the compacted material is into a transport vehicle for subsequent transfer to a waste disposal or recycling site at which point the material has to be removed from the transport vehicle.
One known method is that of hydraulically jacking the container portion of the vehicle to a sufficient angle to allow the material to be ejected under the force of gravity. Particularly at soft surface land-fill sites this entails a danger of the vehicle tipping over side-ways as its center of gravity is raised during the jacking process.
Another known method is by means of a so-called walking floor fitted to the vehicle in which a series of hydraulically articulated rails cover the floor of the vehicle. These are bulky, very complex, expensive and heavy devices with high wear rates and maintenance costs, adding significantly to the cost of waste management.
In general the conveying of solid material or objects into and out of a transport vehicle is generally a time consuming operation often involving piecemeal retrieval of one object at a time from its pre-loading position to a position in the transport vehicle. Particularly in the case of palletized materials, the usual method is by means of a fork-truck or similar equipment. This imposes limitations on the type of vehicle which can be used, generally requiring a vehicle with side-loading capability. This requires considerable adjacent space, which may be a scarce and expensive commodity at city loading docks for example.
It is an object of the present invention to address or ameliorate at least one of the above disadvantages.
Accordingly in one broad form of the invention there is provided an incremental material urging system adapted to the compaction of a volume of compactable material; said system comprising:
Preferably a first one of said two cooperating mechanical systems is an urging structure driving mechanism.
Preferably a second one of said two cooperating mechanical systems is an incrementing urging structure engagement mechanism disposed within said incrementing urging structure.
Preferably said incrementing urging structure is comprised of a box-like structure having at least a material urging front compacting face substantially equal in area and dimensions as the internal cross section of said container structure; said urging structure further including side elements and top and bottom elements adapted to permit sliding movement of said urging structure within said container structure.
Preferably each of said side wall structures is provided with an elongate slot extending substantially the length of said container structure; said slot communicating with the inside surface of each of said side wall structures.
Preferably said incrementing urging structure engagement mechanism includes a pair of thrust tongue plates each disposed at one of said side elements of said urging structure and urged by actuator means so as to alternate between a first inwardly retracted state and a second outwardly projecting state; the arrangement being such as to cause each of said thrust tongue plates to project outwardly through a respective said elongate slot.
Preferably said engagement mechanism further includes a pair of retainer tongue plates; each of said retainer tongue plates disposed at respective said side elements of said incrementing urging structure and urged by actuator means to alternate between a first inwardly retracted state and a second outwardly projecting state; the arrangement being such as to cause each of said retainer tongue plates to engage with respective ones of a pair of opposing retainer slots; said pair being one pair of a plurality of pairs of retainer slots arranged along said sidewall structures of said container structure.
Preferably said incrementing urging structure driving mechanism includes a pair of elongate members disposed along respective outsides of said sidewall structures; said elongate members urged into reciprocal horizontal motion by incrementing urging structure driving mechanism hydraulic rams.
Preferably said pair of elongate members are linked rigidly together at rearmost ends of said elongate members by a cross member.
Preferably each said elongate member is provided with a plurality of equi-spaced engagement nests; each said nest including an elongate slot; each said elongate slot of each of said engagement nests horizontally aligned with said elongate slot in said sidewall structure.
Preferably successive opposing pairs of said elongate slots of said engagement nests are adapted to receive inserted therein a respective said thrust tongue plate when said thrust tongue plates are urged into said outwardly projecting state.
Preferably spacing between said engagement nests is substantially equal to the stroke of said incrementing urging structure driving mechanism hydraulic rams. Preferably spacing between said plurality of retainer slots is equal to said spacing between said engagement nests.
Preferably said system is further provided with a retracting mechanism; said retracting mechanism adapted to retract said incrementing urging structure from an advanced position within said container structure to a rearward position.
Preferably said retracting mechanism comprises a winch located at a rearward end of said container structure; a cable or chain from said winch attached to said urging structure; said retracting mechanism including sensing means adapted to monitor position of said incrementing urging structure within said containing structure.
Preferably said container structure is provided with load cells disposed at each corner support of said container structure; signal outputs of said load cells processed by a computer linked to said load cells; said computer adapted to monitor weight and weight distribution of a volume of compacted refuse in said container structure.
In a further broad form of the invention there is provided a method for forward incremental urging of the incrementing urging structure described above along the length of said container structure; said method including the steps of:
In a further broad form of the invention there is provided a method for the compaction and transfer to a refuse transport means of a volume of refuse, said method including the steps of:—
Preferably each increment of said material urging structure from said fully retracted position towards said fully advanced position moves material towards said discharge end.
Accordingly there is provided in a further broad form of the invention an incremental material urging system comprising:
Preferably said container structure includes;
Preferably said material urging structure is incrementally retracted by said activating means from said discharge end to said rear end of said container structure,
Preferably said activating means are disposed along each side wall of said container structure and wherein said activating means operate substantially in unison.
Preferably said material urging structure is a close sliding fit within said container structure, said material urging structure adapted to slide on the surface of said floor sub-structure.
Preferably each of said side wall substructures is provided with a slot extending substantially along the length of said wall substructure, said slot providing a separation between an upper and a lower portion of internal wall sheeting.
Preferably said material urging structure is provided on each side of said structure with a projecting lug, each one of said lugs projecting through one of said slots.
Preferably each of said slots is co-linear with a rail system said rail system adapted to support and guide a reciprocating beam.
Preferably said reciprocating beam is provided with a plurality of thrust assemblies, said thrust assemblies disposed at substantially equal intervals along the length of said beam, between a forward end and a rear end of said beam.
Preferably each of said thrust assemblies includes;
(a) an assembly support
(b) a double ended pawl
(c) a pawl pivot shaft
(d) a pawl actuator means
Preferably said double ended pawl is rotatable about said pawl pivot shaft by said pawl actuator means from a first forward thrusting position to a second rearward thrusting position.
Preferably said pawl actuator means is a linear actuator.
Preferably each of said double ended pawls is rotated by a linear actuator; said actuator pivotally connected at a first end to one end of said double ended pawls and at a second end to said reciprocating beam.
Preferably each of said double ended pawl is provided with a pawl control bracket, said bracket supporting a control pivot shaft.
Preferably each said control pivot shaft is pivotally connected to a common control arm, said control arm being pivotally connected at an outer end to a linear actuator and wherein said actuator is pivotally connected to said reciprocating beam.
Preferably each said double ended pawl is adapted to thrust against the rearward facing side of said projecting lug when said double ended pawl is in said forward thrusting position and to thrust against the forward facing side of said projecting lug when said double ended pawl is in a rearward thrusting position.
Preferably that portion of a first end of said double ended pawl adapted to thrust against said projecting lug presents a vertical outer surface when set in said forward thrusting position or said rearward thrusting position; a second end of said double ended pawl then rotated to a position precluding potential contact with said projecting lug.
Preferably each opposite face of each of said first end and said second end of said double ended pawl is a sloping face, each said sloping face intersecting on the bisector of said double ended pawl so as to form a shallow “V” shaped space and where said sloping opposite face of that end set to a thrusting position is adapted to impart a turning moment to said pawls when impacting on said projecting lug while said pawl actuator means is deactivated.
Preferably each said double ended pawl may be rotated when impacted by a said sloping face to a position about said pivot shaft such that said projecting lug is able to pass said thrust assembly.
Preferably said reciprocating beam is urged into reciprocating motion by an hydraulic ram pivotally connected at a first end of said ram to said reciprocating beam and at a second end of said ram to said container structure.
Preferably said reciprocating beam is fitted at its forward outer end with an initial retraction thrust block and at its rear outer end with an initial advance thrust block.
Preferably, when said material urging structure is in a fully retracted first position at said rear end of said container structure and said hydraulic ram is retracted, said projecting lug is located between said initial advance thrust block and the first thrust assembly located nearest said rear end of said reciprocating beam.
Preferably said reciprocating motion for a first forward movement of said material urging structure comprises the steps of:
Preferably subsequent forward increments of said material urging structure comprise the steps of:
Preferably, when said material urging structure is in a fully advanced position at said forward end of said container structure and said hydraulic ram is extended, said projecting lug is located between said initial retract thrust block and the thrust assembly located nearest said forward end of said reciprocating beam.
Preferably a sequence for a first rearward movement of said material urging structure comprises the steps of:
Preferably subsequent rearward increments of said material urging structure comprise the steps of:
Preferably said urging system is adapted to the compaction of refuse.
Preferably said roof is provided with an openable aperture for the introduction of refuse into said container structure.
Preferably said discharge end closure means is in the form of a discharge gate, said gate adapted to provide a reaction surface for the compaction of said refuse between said discharge gate and said material urging structure.
Preferably said container structure is provided with an intermediate openable gate positioned between said discharge gate and said openable aperture in said roof, said intermediate gate adapted to provide a reaction surface for the compaction of refuse between said intermediate gate and said material urging structure.
Preferably said container structure is provided with a plurality of articulated compaction devices; said devices supported by hinges along said sides of said container structure; said devices acting through apertures in said sides to intrude into a volume of refuse contained in said container structure.
Preferably said articulated compaction devices are hinged from said roof of said container structure; said compaction devices acting through apertures in said roof.
Preferably said container structure is provided with at least one articulated section of said floor substructure; said section adapted to rise vertically within said container structure to provide compaction force on a volume of refuse.
Preferably said container structure is provided with at least one articulated section of said roof; said section adapted to descend vertically within said container structure to provide compaction force on a volume of refuse.
Preferably said material urging system is adapted to the transfer of a compacted volume of refuse from said container structure into a transport vehicle.
Preferably said system is adapted to the retrofitting of said system to existing refuse transfer stations.
Preferably said system is adapted to the reduction in volume of any compactable material.
Preferably said system is adapted to the discharge of material from a transport vehicle, the load container of said vehicle forming a container structure.
In a further preferred embodiment of the invention said material urging structure activating means includes a primary mechanical system and a secondary mechanical system.
Preferably said primary mechanical system includes a pair of hydraulic rams; each hydraulic ram of said pair of hydraulic rams affixed to a rearward end of one of said side wall substructures.
Preferably said piston rod of each hydraulic ram of said pair of hydraulic rams is connected to a respective engagement nest beam.
Preferably each said respective engagement nest beam extends substantially the length of said container structure.
Preferably each said engagement nest beam is adapted to simultaneous guided reciprocal motion by in-stroke and outstroke action of said hydraulic ram.
Preferably each nest of said engagement nest beam is provided with an elongate slot.
Preferably each said elongate slot lies in a common horizontal plane with said slot extending substantially along the length of said wall substructure.
Preferably each successive said elongate slot is spaced along each said respective engagement nest beam according to said in-stroke and out-stroke of said hydraulic ram.
Preferably said secondary mechanical system is at least partially incorporated within said material urging structure.
Preferably said secondary mechanical system comprises a pair of thrust tongue plates adapted to alternate between a first extended state so as to project from respective sides of said material urging structure and a second retracted state.
Preferably said pair of thrust tongue plates is urged between said first extended state and said second retracted state by hydraulic means.
Preferably each one of said pair of thrust tongue plates projects through respective ones of said slots extending substantially along the length of respective said wall substructures when in said first extended state.
Preferably each one of said pair of thrust tongue plates is adapted to engage with one of said elongate slots when said thrust tongue plates are in said first extended state.
Preferably each one of said pair of thrust tongue plates is caused to engage with a respective said elongate slot when each said ram of said primary mechanism is in an in-stroked state.
Preferably each one of said pair of thrust tongue plates is caused to disengage from a respective elongate slot when said thrust tongue plates are retracted into said first state.
Preferably said material urging structure is incremented between an initial position and a successive position by stroking of said hydraulic ram while each one of said pair of thrust tongue plates is engaged with said respective elongate slot.
Preferably said material urging structure is incremented forwardly when said pair of hydraulic rams out-strokes and rearwardly when said pair of hydraulic rams in-strokes.
Preferably each side wall of said side wall substructures is provided with a plurality of apertures along the length of said container structure; successive ones of said apertures spaced according to said in-strokes and outstrokes of said pair of hydraulic rams.
Preferably said secondary mechanical system includes a pair of retainer tongue plates adapted to alternate between a first extended state so as to project from respective sides of said material urging structure and a second retracted state.
Preferably said retainer tongue plates project through respective ones of said plurality of apertures when in said first extended state.
Preferably said retainer tongue plates are urged between said first extended state and said second retracted state by hydraulic means.
In a further preferred embodiment of the invention there is provided an incremental material urging system comprising;
Preferably said material urging structure includes a substantially vertical surface adapted to act against moveable load objects.
Preferably said urging structure incrementing means include:
Preferably each said at least one linear actuator is attached at a first end to a rear portion of said urging structure and at a second end to a said guide element clamping mechanism; said at least one linear actuator lying substantially in a vertical plane through a corresponding one of said at least one guide element.
Preferably said guide element clamping mechanism comprises a clamping caliper provided with gripping pads adapted to apply frictional force to each side of said at least one guide element.
Preferably said at least one linear actuator is an hydraulic ram.
Preferably a said guide element clamping mechanism is activated by an hydraulic ram.
Preferably an increment of said urging structure for the purpose of advancing said load objects along said floor structure is effected by the steps of:
Preferably an increment of said urging structure for the purpose of retracting said urging structure is effected by the steps of:
Preferably said at least one guide element is a rail.
Preferably said at least one guide element is a channel let into said elongate floor structure.
In a further preferred embodiment of the invention there is provided an incremental material urging system comprising;
Preferably said material urging structure is supported on said at least one rail elements by friction reducing means.
Preferably wherein said material urging structure is supported by said floor structure by friction reducing means.
Preferably said floor structure is provided with material urging structure arresting means.
Preferably said arresting means are comprised of a plurality of vertical articulated pins disposed in pairs transverse to said at least one rail element and at intervals along the length of said at least one rail element equivalent to the stroke length of said linear actuator, said pins adapted to move between a first retracted position flush with said floor and a second extended position projecting from said floor.
Preferably said material urging structure is provided with friction pads, said pads adapted to be driven downwardly relative to said urging structure so as to provide friction sufficient to arrest said structure at an incremented position.
In a further preferred embodiment of the invention there is provided an incremental material urging system adapted to the compaction of a volume of compactable material; said system comprising:
Preferably each of said side wall structures is provided with an elongate slot extending substantially the length of said container structure; said slot communicating with the inside surface of each of said side wall structures.
Preferably said urging structure is urged into incremental horizontal motion within said container structure by two cooperating mechanical systems.
Preferably a first one of said two interacting mechanical systems is an incremental urging structure engagement mechanism.
Preferably a second one of said two interacting mechanical systems is an urging structure driving mechanism.
Preferably said incrementing urging structure is comprised of a box-like structure having at least a material urging front compacting face substantially equal in area and dimensions as the internal cross section of said container structure.
Preferably said urging structure further includes side elements, top and bottom elements adapted to permit sliding movement of said urging structure within said container structure.
Preferably said urging structure engagement mechanism is disposed within said box-like structure.
Preferably said engagement mechanism includes a pair of thrust tongue plates each disposed at one of said sides of said urging structure and urged by actuator means so as to alternate between a first inwardly retracted state and a second outwardly projecting state; the arrangement being such as to cause each said engagement plate to project outwardly through said elongate slot.
Preferably said engagement mechanism further includes a pair of retainer tongue plates each disposed at one of said sides of said urging structure and urged by actuator means to alternate between a first inwardly retracted state and a second outwardly projecting state; the arrangement being such as to cause each said retainer plate to engage with one of a plurality of retainer slots in said sidewall structures of said container structure.
Preferably said actuator means are hydraulic rams.
Preferably said urging structure driving mechanism is comprised of two concurrently operating mechanisms disposed along the outside of each of said sidewall structures.
Preferably each of said two mechanisms is comprised of an incrementing hydraulic ram and an elongate member urged into reciprocal horizontal motion by said ram.
Preferably said elongate member is provided with a plurality of equi-spaced engagement nests; each said nest including an elongate slot.
Preferably each said elongate slot of each of said engagement nests is coincident with said elongate slot in said side wall structure.
Preferably each said elongate slot of said engagement nest is adapted to receive said engagement tongue plate when said tongue plate is in said outwardly projecting state.
Preferably spacing between said engagement nests is substantially equal to the stroke of said incrementing hydraulic ram.
Preferably spacing between said plurality of retainer slots is equal to said spacing between said engagement nests.
Preferably a method for forward incremental urging of said urging structure along the length of said container structure includes the steps of:
Preferably a method for rearward incremental urging of said urging structure along the length of said container structure includes the steps of:
In a further preferred embodiment of the invention there is provided a method for the compaction and transfer to a refuse transport means of a volume of refuse, said method including the steps of:—
Preferably each increment of said material urging structure from said fully retracted position towards said fully advanced position moves material towards said discharge end.
Preferably each increment of said material urging structure from said fully retracted position towards said fully advanced position moves material towards said discharge end.
In a further preferred embodiment of the present invention there is provided a method for the removal of material from the container structure of a transport vehicle, said method including the steps of:—
In a further broad form of the invention there is provided a method for the movement of material along a supporting surface from a first position to a second position, said method including the steps of:—
Preferably each increment of said material urging structure from said fully retracted position towards said fully advanced position moves material towards said discharge end.
Preferably each increment of said material urging structure from said fully retracted position towards said fully advanced position moves material towards said discharge end.
Preferably each increment of said material urging structure from said fully retracted position towards said fully advanced position moves material towards said discharge end.
In a further preferred embodiment of the invention there is provided a material urging structure adapted to the transfer of material from a first loaded position to second unloaded position by incremental movements induced by reciprocating extensible urging means; where said reciprocating extensible urging means have an operating stroke significantly smaller than the separation between said first loaded position and said second unloaded position.
Embodiments of the present invention will now be described with reference to the accompanying drawings wherein:
a and 2b show a first and second embodiment of the invention in use,
a to 5c show a first operating sequence of a component of part of the first preferred embodiment of the invention,
a to 6c show a second operating sequence of the component of
a to 8c show a first operating sequence of a component part of the embodiment of
a to 9c show a second operating sequence of a component part of the embodiment of
a and 10c show a third operating sequence of a component part of the embodiment of
A first preferred embodiment of the invention will now be described with reference to the accompanying drawings in which a material urging system is adapted to the compaction of loose material.
With reference to the perspective view of
a shows material urging system 10 in loading mode, with side wall substructure and part of internal wall sheeting removed for clarity, and where material urging structure 12 is fully retracted at rear end 13 of container structure 11 and compactable material 24 is introduced through top opening 18.
b shows material urging system 10 with side wall substructure 16 removed for clarity, and where compacted material 25 has been ejected through opened discharge gate 21 into transport vehicle 26.
The process of compaction of compactable material according to this first embodiment of the invention will now be described in more detail.
Wall substructure 16 includes upper frame structure 34 and lower frame structure 35 made up of a plurality of vertical frame members 27 and horizontal frame members 28 (as further illustrated in
The upper and lower portions of wall sheeting 30 and 31 and frame structures 34 and 35, are separated so as to form a horizontal slot 32 extending substantially for the length of the container structure 11. Joining webs 36 are rigidly connected to each corresponding upper and lower vertical frame member 27 to effectively combine upper and lower frame structures 34 and 35 into a unified rigid structure.
Still with reference to
Interposed between adjoining longitudinal rails 37 is an I-beam 39 oriented so that its central web hangs vertically in slot 40 with the underside surfaces of its upper flange supported on the bearing strip material 38 covering the upper surfaces of longitudinal rail members 37. The sizes of rail members 37, I-beam 39 and bearing strip material 38 are so chosen as to allow a sliding fit reciprocating movement of I-beam 39 on rails and bearing strips.
Attached to the upper flange of I-beam 39 is thrust block 41. A main hydraulic ram 42, attached to wall substructure 16 at the ram's passive end 43, and to thrust block 41 at its rod end 44, is adapted to impart the reciprocating movement to I-beam 39.
Attached to the lower flange of I-beam 39 is a plurality of thrust assemblies 46a to 46n. Each thrust assembly 46 includes a double ended pawl 48 of which a first end 51 is visible in
Material urging structure 12 is adapted to slide on floor 15 and is a close sliding fit between internal wall sheeting 29 and roof 17. Each side of material urging structure 12 is provided with projecting lug 45, adapted to extend through slot 32 so as to engage with one end of double ended pawl 48.
Material urging structure 12 shown as hatched, has been moved towards the discharge gate 21 of container structure 11 to the position shown, by a first extension stroke of hydraulic ram 42 acting on I-beam 39. First movement of I-beam 39 was transferred to projecting lug 45 through pawl first end 51a of thrust assembly 46a. As shown in
The interaction of material urging structure 12 projecting lug 45 and a thrust assembly 46 will now be described in detail with reference to
At the start of a compaction sequence, material urging structure 12 is fully in its retracted position at rear end 13 of container structure 11 (
Hydraulic ram 42 now retracts, to pull I-beam 39 back to its initial position. This requires second thrust assembly 46b to pass the projecting lug 45 as shown in
This sequence is repeated until material urging structure 12 reaches a point of maximum or desired compaction. Discharge gate 21 is then opened and the compacted material incrementally advanced until material urging structure 12 reaches its forward limit at forward end 14 of container structure 11, projecting through opened discharge gate 21.
Depending on the material being compacted, the material urging structure 12 may be subject to a degree of “spring-back”, especially as maximum compaction is approached towards the end of the compaction process. This can force the urging structure back into a position where the next thrust assembly cannot be retracted back past the projecting lug and hence no further incremental movement of the urging structure is possible. To prevent this situation, material urging structure 12 may be fitted with braking or locking means which are activated during the retraction of I-beam 39 and until the double ended pawls are returned to the forward thrust position.
For the incremental movements towards forward end 14, main ram 42 does not out-stroke to its full extent, the stroke being controlled by suitable limit switches. This is to allow the furthest forward thrust assembly 46n to be driven just past lug 45, (when second end 52n has been rotated to its reverse thrust position and its actuator is de-activated), by a full extension of the main ram 42. After extending pawl actuator 49n to reset second end 52n to the reverse thrust position, the first return increment of material urging structure 12 towards rear end 13 of container structure 11 may be made.
This process is shown in
With pawl actuator 49n de-activated, thrust assembly 46n is pushed past lug 45 by the full extension of main ram 42 as shown in
This sequence is repeated until the material urging structure 12 is returned to its fully retracted position at rear end 13 of container housing 11. The retraction strokes of main ram 42 for the incremental retraction of material urging structure 12 are shorter than the full retraction stroke of main ram 42, the stroke being limited by suitable limit switches. This is to allow the first thrust assembly 46a to be retracted past lug 45 by a full retraction of the ram to re-commence the incremental compaction sequence described above.
In use, the incremental advance of the material urging structure towards the forward end of container structure 11, occurs once a quantity of compactable material has been introduced into container structure 11 and both the top opening cover 19 and discharge gate 21 are closed. When a desired degree of compaction has been achieved at some point during the advance of material urging structure 12, discharge gate 21 is opened and the compacted material ejected by the completion of the incremental advance of the urging structure.
As an aid to the compaction process, an optional intermediate compaction gate may be located at some point between the top opening and the discharge gate. This allows smaller quantities of refuse material to be compacted and, once compacted, to be pushed past the intermediate gate. This has the advantage of achieving a higher compaction density of the final compacted load available for transfer to the refuse transport vehicle.
In a second preferred embodiment of the invention, the construction of the container structure is as that previously described for the First Embodiment above and, as before, both sides of the container structure are symmetrical and carry symmetrical mechanical systems. Like features are numbered as for the first embodiment but with the addition of 100 so that for example feature 39 is number 139 in this embodiment and so forth.
With reference to
Control arm 164 similarly connects to each of the control pivot shafts 162 of each of the thrust assemblies 146 whereby reciprocating movements of control arm 164 have the effect of rotating the attitude of double ended pawls 148 between a forwardly incrementing thrust position as in
Control arm 164 is connected to a pawl control actuator 166 (shown in
Intermediate Incrementing of Material Urging Structure
With reference to
This brings first end 151(i) of pawls 148(i) of that thrust assembly 146(i) which is closest to projecting lug 145 of the material urging structure 112 (represented in
When this stroke of I-beam 139 has reached its limit, pressure is released from the pawl control actuator and I-beam 139 is retracted by hydraulic ram 142. Towards the end of this retraction stroke, the next forward thrust assembly 146(i+1) to assembly 146i just used to drive the material urging structure forward, has to pass the projecting lug 145. This situation is shown in
This rotation continues until first end 151(i+1) of double ended pawl 148(i+1) slides over the top of projecting lug 145 as shown in
This sequence is repeated until material urging structure 112 reaches a point of maximum or desired compaction. Discharge gate 21 is then opened and the compacted material incrementally advanced until the material urging structure reaches its forward limit at forward end 114 of container structure 111, projecting through opened discharge gate 121.
To prevent “spring-back” of the material urging structure 112 induced by the compacted material driven before it, urging structure 112 may preferably be fitted with braking or locking means to retain its incremented position while thrust assemblies are being retracted for a next forward increment.
First Return Increment
The final forward incremental stroke of the main rams drives the material urging structure through the discharge gate sufficiently far to completely push the compacted material into the adjoining transport vehicle as shown in
When I-beam 139 is retracted, thrust return block 165 acts on projecting lug 145 and material urging structure 112 is moved a first partial return increment towards the rear end 113 of container structure 111. The pawl control actuator now extends to rotate double ended pawls 148n into their return thrust position as shown in
The remaining returning increments are a reverse procedure of the intermediate incrementing sequence described above.
First forward increment
The final rearward incremental retraction of the main rams 142 causes projecting lug 145 to reach the position at rear end 113 of container structure 111 as shown in
At the first extension of main ram 142 from this position of the material urging structure 112 at rear end 113, it is the forward thrust block 167 which pushes the projecting lug 145 and hence material urging structure 112 forward to the first partially incremented position shown in
Pressure is then released from the pawl control actuator and the I-beam retracted to pull thrust assembly 146a past projecting lug 145. Pawl control actuator 166 then retracts to return double ended pawls 148a into their forward thrust position. The main ram 142 then extends to complete the first incremental advance of the material urging structure, followed by the intermediate increment sequence described above.
As with the first embodiment, in this embodiment of the invention also, the container structure may optionally be fitted with an intermediate compaction gate to allow the sequential assembling of a full compacted load from smaller compacted quantities of waste material.
Although both the first and the second embodiments described above are directed at compaction and the incremental urging mechanisms act in conjunction with a container structure, the principle of the mechanisms may be applied for example to drive solid materials along a supporting surface. Thus the system may be adapted to drive an array of palletized materials or containers along the length of a loading dock for transfer into a transport vehicle. In such a system the urging mechanisms may be disposed at floor level or recessed into channels along both sides of the dock with the equivalent of the material urging structure adapted to slide on the surface of the loading dock or on suitable friction reducing means such as rails or wheels or a combination of these.
While uni-directional compaction of a volume of refuse as described in the above embodiments greatly reduces the cost of waste handling and transportation, greater compaction and further economies can be achieved by applying compressive forces in more localized areas and in different directions within the refuse volume.
There are therefore provided in this embodiment additional devices which may optionally be fitted to the container structure of the first and second embodiments as previously described.
With reference to
In a preferred first form of this embodiment, at least one additional compaction device 220 is provided along each of the two side walls 216 of the container structure 211 in the area between the top opening and the discharge end of the container. Where a container structure is provided with an intermediate compaction gate the additional compaction devices may best be placed in the area between the top opening and the intermediate gate, but could also be located between the intermediate gate and the discharge gate or even in both these areas.
Again with reference to
Apertures in the side walls are adapted to accept the shape of the compactor plate 230 and attachment structure 234 so that when the hydraulic ram of a compaction device is activated, the compactor plate is rotationally driven through the aperture to impact on any refuse material in that area of the container structure.
Initially, during the loading of refuse into the container structure and subsequently during the passage of the material urging structure towards the forward end, the compactor plates of the compaction devices are maintained flush with the internal walls of the container structure. The devices are best brought into action when a sufficient amount of partly compacted material has been accumulated in the area in which the devices are located.
Attachment structures 234 are preferably shaped so as to shut off the aperture through which the compaction device acts so as to prevent refuse material being pulled back through the aperture 237 as the compactor plate 230 is retracted to its position flush with the internal surface the of side wall.
In a second preferred form of this embodiment the additional compaction devices are mounted from the roof of the container structure and operate through apertures in the roof.
In a further preferred embodiment of the invention the container structure of the first and second embodiments as described above is provided with other additional compaction urging sub-systems. In this form at least a portion of the floor of the container structure is articulated so as to be driven vertically upward by actuators so as to intrude into the container volume from below. The floor portion may be so articulated as a single section or in a number of sections so as to apply maximum compaction force to relatively small volumes of compactable material.
Similarly, a portion of the roof of the container structure, singly or in sections, may be articulated to provide compaction force from above. These compacting forces acting from below and from above may then be applied together or in an alternating sequence to the compactable material to provide the maximum disturbance so as to minimise voids. A sequence may include periods where both the upper and lower compacting surfaces advance followed by rapid reversals of direction so as to agitate the material.
In a further aid to agitation the floor of the container structure may be provided with oscillating or reciprocating plate sections set into shallow scalloped recesses so as not to impede the advance of the incrementing material urging structure as described in the previous embodiments.
In a fifth preferred embodiment of the invention, the incremental advancing mechanism of the first or second embodiments described above is adapted to the unloading of a transport vehicle. In this instance the object of the mechanism is not to compact but to remove a substantially unobstructed load, such as for example a compacted refuse load from a transport vehicle.
With reference to
Disposed along each side of the transport vehicle are urging mechanisms 319. Urging mechanisms 319 include rail structures extending along the length of the vehicle, which carry reciprocating beams activated by hydraulic rams 316. Each reciprocating beam is provided with thrust assemblies at intervals along its length; these assemblies being in the form described in the first or second embodiments above. Since no compaction is required the hydraulic rams driving the material urging structure are of significantly smaller diameter, and the components of the incrementing mechanism proportionately lighter in construction than those of the previously described embodiments.
The thrust assemblies are caused to act sequentially on material urging structure 310 which is provided, after the manner of the previously described embodiments, with lugs which project from each of its sides through slots 318 along internal walls 314 of the vehicle.
In use, a transport vehicle fitted with this mechanism is loaded while material urging structure 310 is fully retracted to the front end 311 of the vehicle 300. At a discharge site it remains simply to open the doors at rear end 312 and activate the incremental advancing mechanisms to completely empty the transport vehicle.
In a sixth embodiment of an incremental material urging system there is provided a rail system, a material urging structure and an incrementing drive mechanism.
With reference to
For the material urging structure 412 to incrementally advance along rails 411, linear actuators 414 are initially retracted as shown in
Urging structure 412 may be incrementally reversed along the rails by a reverse sequence of the linear actuator extensions and retractions and the clamping mechanisms.
In an alternative preferred form of this embodiment, the rails may be substituted by channels let into a floor structure and in which the clamping mechanisms comprise outwardly acting calipers to act on the internal sides of the channels. In this form of the embodiment the urging structure may be adapted to slide on the floor surface or be provided with friction reducing means such as for example wheels.
In use, the mechanism may be used to advance objects along a platform such as for example a loading dock. Thus, again by way of example, an array of two rows of pallets making up the entire load intended for a flat bed transport vehicle may be transferred from the loading dock in a series of incremental linear movements. For this application a preferred arrangement of the rails is that of two pairs of rails, each pair suitably spaced to provide support and guidance to the rows of pallets.
In further examples of applications of this embodiment, the device may be installed in a transport vehicle for the purpose of ejecting a load from the vehicle, or when fitted to the container structure of a refuse transfer station it may be used to incrementally drive a material urging structure.
In yet a further example of the use of the device, the rails may include curved sections.
The urging structure may be fitted with braking means to maintain it at any incremented position while the linear actuators re-position the clamping mechanisms. When provided with such braking means the urging structure may be adapted to operate along inclined surfaces.
In a seventh preferred embodiment of the invention an incremental material urging system comprises a set of reciprocating rail structures, a material urging structure and clamping mechanisms.
With reference to
Floor structure 510 is further provided with a plurality of arresting pins 517 retracted flush with the floor when not in use but adapted to project a certain distance above floor level when required. Arresting pins 517 are arranged, preferably in pairs transverse to the rails, at intervals along floor 510 corresponding to the stroke length of linear actuator 514.
A material urging structure 512 is adapted to ride on rails 511 and is provided with clamping mechanisms 516 adapted to grip onto the rails. An incremental movement of material urging structure 512 may then be effected by applying clamps 516 and activating linear actuator 514 to urge an incremental movement of rails 511 thereby forcing a corresponding movement of urging structure 512.
Thus for a movement in the direction away from the linear actuator as mounted in
Clearly the sequence when reversed allows for the movement of the urging structure in the opposite direction also. In a further form of this embodiment the arresting pins acting through the floor may be replaced by a locking system incorporated in the material urging structure itself. One form of such a locking system comprises friction pads driven downwardly from the urging structure against the floor, providing sufficient friction to prevent the urging structure from being moved from its current position through the repositioning of the rails for the next increment. In a further preferred form, the urging structure is lifted clear of contact with the rails while these are retracted for a next increment.
In yet a further alternative form of this embodiment the material urging structure is supported on wheels or other friction reducing means on the floor and not on the articulated rails which instead pass through clearance channels in the structure or below the structure so that when the clamps are released the rails may be relocated with no disturbance to the urging structure.
The device as described may be used as both a means of transferring a load from a loading dock onto a transport vehicle or, when fitted to the floor of a transport vehicle, for the unloading of that vehicle.
Again, when fitted to the container structure of a refuse transfer station the device may be used to drive a material urging structure for the compaction of a refuse load.
In yet a further embodiment of an incremental material urging system adapted to the compaction of loose material, a container structure similar to that previously described for the first embodiment herein above and shown in
A material urging structure 600 of the present embodiment shown in
The material urging structure 600 is urged into incremental movement in both an advancing and compacting forward direction, that is towards the discharge gate, and a retracting direction, through the interaction of two hydraulically driven mechanical systems; a driving system and an engagement system.
The first of these, the driving system, includes two identical mechanisms disposed one on each side of the container structure 700. With reference to
Engagement nest beam 654 is provided with a number of engagement nests 656 rigidly connected to the beam 654 and equi-spaced along the length of the beam; the spacing conforming to the stroke of the ram 651. Each nest 655 may take the form of a plate 657 in which is provided an elongate slot 658. These elongate slots 658 then lie along a common horizontal line at a level coincident with the continuous slot 706 in each side wall substructure 704 which extends substantially along the length the container structure as previously described in the first preferred embodiment above.
The second mechanical system, that is the engagement system mechanism 615, is shown in
Mounted to and between the inner ends of first thrust tongue plate 616 and second thrust tongue plate 617 is a thrust tongue hydraulic ram 627. It will be clear that by means of the mechanism of linkage arms 622 and 623 and central pivot arm 624, first thrust tongue plate 616 and second thrust tongue plate 617 will retract inwardly when thrust tongue hydraulic ram 627 in-strokes and extend outwardly to the position shown in
Referring again to
Second mechanism 615 is further provided with first and second retainer tongue plates 630 and 631, each of which is urged into reciprocal motion by hydraulic rams 632 and 633 respectively. When hydraulic rams 632 and 633 are in out-stroked position (as shown in
Each side wall substructure 704 of the container structure 700 is provided with a series of retainer slots 708 as shown in
The slots 706 are sized to accept the insertion of retainer tongue plates 630 and 631 as a sliding fit so as to lock material urging structure 600 into a currently incremented position.
To effect a forwardly incrementing movement of the material urging structure 600, rams 651 are initially in an in-stroked condition. First and second thrust tongues 616 and 617 are then urged into an outwardly extended position by the out-stroking of thrust tongue hydraulic ram 627 so as to project through the continuous slots in the side walls of the container structure and engage with coinciding slots 658 of engagement nests 656 of each of the driving system engagement nest beams 654.
As first and second thrust tongues 616 and 617 engage with aligned nest slots 658, first and second retainer tongues 630 and 631 are retracted from engagement with their respective coinciding retainer slots 708. The driving system rams 651 then out-stroke to drive material urging structure 600 into a next advanced position where retainer tongues 630 and 631 are urged outwardly to engage with the corresponding retainer slots 708 in the side walls. This prevents any partial retraction of the material urging structure 600 which may be induced by the reaction force of compressed material between material urging structure and the discharge gate.
The first and second thrust tongues 616 and 617 are now retracted from their engaged position with the slots 658 of nests 656 of the engagement nest beams 654 thus allowing the rams 651 of the driving mechanical system 650 to retract. This brings the next forward nests 656 of the engagement nest beams 654 into coincidence with the thrust tongue positions of the material urging structure to allow for a further incrementing cycle.
The discharge gate may be opened when the material urging structure 600 has reached a position relative to the engagement nests 656 where the compression of the material between the discharge gate and the material urging structure has reached a desired degree. This will generally occur well before the most forwardly incremented position available. Preferably sufficient material is loaded into the container structure, and that point of desired compression achieved, when the volume of the compressed material is approximately equal to that of a transport vehicle brought into alignment with the container structure at the discharge end.
Further forward increments of the material urging structure may then be used to drive the compressed volume of material into the transport vehicle through the opened discharge gate. In at least one preferred form of the present embodiment the last forward stroke of the primary system and the configuration of the material urging structure are such that the material urging structure projects sufficiently through the discharge gate to fully drive a load of compacted material into an abutting transport vehicle.
At the final forward increment the first and second thrust tongue plates 616 and 617 remain engaged with their respective nests and the subsequent in-strokes of the primary system rams 651 then constitute the first retraction of the material urging structure 600. Further retraction cycles may be effected by sequences of retraction of first and second thrust tongue plates, out-stroking of the primary system rams and re-engagement of the first and second thrust tongue plates with the next coincident nests of the engagement nest beams. Since there is no reaction force of compressed material acting on the material urging structure, the use of the first and second retainer tongues during retraction is not required.
In a further preferred embodiment of the invention, with reference to
In this embodiment nest beams 822 and 824, perform the same function as the nest beams 654 shown in
Again, as for the Eighth Embodiment described above, material urging structure 600 is provided with the same hydraulically operated mechanism shown detailed in
The incremental forward urging of the urging structure 600 by the nest beams 822 and 824 of the fork-like structure is identical to the process described above for the Eighth Embodiment. However, in this embodiment, the urging structure 600 is not returned to the rearward end 820 of the container structure 810 by a reversal of the incremental urging of the nest beams 822 and 822, but by a separate return mechanism 834 shown in
Return mechanism 824 comprises a winch 836 mounted to the rearward end 820 of container structure 810, with a cable or chain 838 attached to the rearward end of the incremental urging structure 600. Preferably, the return mechanism is provided with a rotary encoder or other monitoring equipment so that the length of cable or chain extending between the winch 836 and the urging structure 600 is known for any location of the urging structure within the container structure 810. By this arrangement, urging structure 600 may be rapidly retracted, either fully from its furthest advanced position at discharge gate 818, or from any advanced intermediate position to a rearward position if required.
With reference now to
The function of these additional compaction devices 850 is to crush heavy rigid articles which may become jammed between the face of the urging structure and the discharge gate 818, and which are of sufficient strength to impede any further forward movement of the urging structure. Preferably, the steel quadrants 852 are some sixty millimeters in thickness so that the force supplied by their driving rams is concentrated on an obstructing article in a narrow band.
Again with reference to
By means of the load cell data and by monitoring the position of the urging means, a refuse load can be prepared which is optimal in both length and weight for the transport vehicle into which it is to be loaded.
The above describes only some embodiments of the present invention and modifications, obvious to those skilled in the art, can be made thereto without departing from the scope and spirit of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| PS1251 | Mar 2002 | AU | national |
This application is a continuation-in-part of U.S. patent application Ser. No. 10/508,747, filed Mar. 4, 2005, which is a National Stage Application of PCT/AU03/00349, filed Mar. 21, 2003, which claims the benefit of priority from Australian application No. PS1251, filed Mar. 21, 2002, all of which are hereby incorporated herein in their entirety. The present invention relates to systems for the incremental conveying of solid material for transfer between adjacent locations and for the incremental compaction of loose polymorphous material for the purposes of minimizing costs of storage, transportation or disposal.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 10508747 | Mar 2005 | US |
| Child | 11418936 | May 2006 | US |
