The invention relates to press consolidators for the consolidation of a substrate, and in particular of a soil/ residue substrate for agricultural application. The invention relates more specifically to a press ring assembly mountable on a packer axle tube, and more completely to a packer axle tube carrying a plurality of such substrate engaging press ring assemblies mounted upon it to form a press consolidator. The invention further relates to a method of mounting a press ring assembly onto a packer axle tube to form a press consolidator, and to a method of replacement of a press ring assembly on a press consolidator.

An arrangement of a plural array of substrate engaging press rings carried on packer axle tube is known for use as an apparatus to be drawn across a substrate surface for breaking down and consolidating a particulate substrate. For example such an assembly of soil/ agricultural residue engaging press rings might be used as a press cultivator for agricultural application, used for example in a cultivation train assembly for breaking down and consolidating soil for cultivation. Press cultivators comprising packer axle tubes each carrying a lateral array of press rings are conventionally used for crumbling and consolidating ploughed ground prior to sowing with seed. Firming the soil profile after disturbance by plough or disc is beneficial as it makes subsequent trafficking and cultivation easier and more effective. The soil profile will accept water more effectively by improved capillary action and if conditions are dry, moisture is more likely to be retained.

In some circumstances with some soil types sufficient consolidation can be achieved by use of a simple roller alone. The roller is drawn across the ploughed ground surface. The weight of the roller serves to break up soil clods and to consolidate the surface to produce a seed bed. Such rollers may be fitted with radically projecting blades to reduce sticking ensuring bite even in inclement conditions and reducing bulldozing. However they primarily act merely by compressing the soil, which can be of limited effectiveness and the excessively flattened surface can also be undesirable, for example in relation to drainage. More typically press cultivators may therefore comprise one or more rows of press rings which consolidate and slice the soil clods remaining from ploughing, enabling break down into a seed bed more easily via subsequent weathering effects.

The invention relates to press consolidators with press ring structures that comprise an outer press ring mounted about and spaced from a relatively small central axle and for example central axle tube by suitable elongate projections such as suitable rigid spokes. The overall consolidator structure is relatively open, with the outer press ring spaced substantially from the central axle. The outer press ring is the primary substrate engaging structure. This arrangement can be contrasted with other press consolidators where press ring structures are mounted directly upon a relatively large diameter central barrel creating a closed structure in which the barrel surface itself may also be a primary substrate working tool. Both arrangements of press consolidator are known, and are known to offer different advantages, to present different problems both in manufacture and operation, and to be suited to particular ground working scenarios and conditions.

Press rings may be made of cast steel rings co-axially mounted on a packer axle and tube to provide a press consolidator to be pulled behind a tractor for example. One or more rows of press rings may be mounted on a common trailer chassis to be pulled behind a tractor for example. Such a chassis may also incorporate structures having other functionality to form a cultivation train assembly; for example rows of press rings may be mounted in train behind a primary or secondary cultivator or like machine. An example of such a cultivation train assembly including a press consolidator embodying such an arrangement is shown in US2014/190711A1.

A typical press ring structure for a press consolidator of this type may comprise an outer press ring and a ring mounting system comprising a plurality of elongate formations extending outwardly and for example radially from a surface of a central axle on which the press ring structure is mounted in use. The ring mounting system may for example comprise a plurality of elongate axle arms. The elongate formations may extend from an inner ring by means of which the press ring structure is mounted on the axle in use. The elements of the press ring structure may be integrally formed and for example integrally cast or may be welded or otherwise fabricated together either prior to or as they are mounted.

Press ring structures may be mechanically mounted on a packer axle tube, for example by sliding separate ring structures onto a shaft. This is the oldest method of manufacturing a ring packer. When worn out the whole ring needs replacing, usually the axle also as the rings wear it.

Alternatively press rings may be mounted on a packer axle tube for example by welding. Welding gives a reliable joint but has its drawbacks, over a few years the rings wear away and need replacing, this is a major engineering task as all the welds have to be cut off, then the axle is cleaned up and new rings are welded on, taking a huge amount of time and energy. An alternative structure for the same purpose has been proposed in which a central axle has multiple radial spokes on each of which is mounted an arcuate element. The arcuate elements do not complete a ring but instead each extends only most of the way back to the preceding spoke. in cantilever manner, and is adapted thereby to flex to some extent in use. The arcuate elements collectively perform an action not unlike the complete and rigid press-rings of more conventional press consolidators, but the degree of flexion is proposed as advantageously tending to reduce accumulation of debris during use. An example of such a consolidator is the Horsch Roll-Flex packer shown at

www.borscb2.comA..US.../ T-Series Joker Parts Catalog 2014.pdf page 26. It is an object of this invention to provide a more versatile means and method for mounting press rings on a press consolidator based on an open assembly arrangement of the packer axle tube/ spoke/ outer ring type in particular preferably to make the press rings replaceable without the need for weld removal or re-welding. It is a particular preferred object of the present invention to ensure that a press ring so mounted on the a press consolidator has a means and method for mounting that delivers a contiguous ring structure degree of the structural integrity and rigidity required to perform effectively in a range of substrate consolidation scenarios and conditions. In accordance with the invention in a first aspect, a press ring structure is provided adapted to be mounted upon a press consolidator axle assembly of the type comprising a central axle formation and a plurality of a plurality of elongate mounting formations extending outwardly and for example radially from a surface of the central axle on which the press ring structure is mounted in use.

The press ring structure comprises a plurality of preferably generally arcuate annular segments, each annular segment having a first end and a second end each adapted to be co-operably mutually mechanically engageable with an adjacent end of a further segment, in that each end portion comprises a flanged engagement portion, the respective flanged engagement portions of the ends of a pair of segments to be engaged adjacently being configured to seat one above the other when so engaged and further configured co-operably to define a through channel to receive a releasably engageable fixing formation;

whereby a first end of a first segment and a second end of an adjacent segment are thus adapted to be mechanically mountable together upon an elongate mounting formation in such manner as thereby additionally to be joined to each other so as to constitute when each annular segment is so engaged and mounted a complete and contiguous annular press ring structure.

In accordance with the invention a press ring is segmented into a number of annular segments, each of these effecting when assembled a simple mechanical engagement with an adjacent segment on either side, and each similarly being mechanically mounted on one or more elongate mounting formations. The segments may thus be brought together and assembled into a fixed and mounted configuration where they form a rigid structure mechanically engaged to one another to form a complete and contiguous annular press ring structure spaced from the central axle by the elongate mounting formations and for example mounted upon the distal ends thereof in an assembly which facilitates the use of a simple mechanical mount to mount the press ring segments in place on the elongate mounting formations and/ or the use of a simple mechanical mount to mount the press ring segments to each other. The invention is distinctly characterised in the manner in which the segments are adapted to be mountable together upon the elongate mounting formation in such manner as thereby additionally to be joined to each other, in particular in that each end portion comprises a flanged engagement portion, the respective flanged engagement portions of the ends of a pair of segments to be engaged adjacently being configured to seat one above the other when so engaged and further configured co-operably to define a through channel to receive a releasably engageable fixing formation such as to engage the two engagement portions together and simultaneously engage them to the elongate mounting formation.

Such an arrangement provides for the attachment and removal of individual press rings, and in particular provides for a mechanical arrangement which can facilitate this without the need for a welding joint. A welding joint may no longer be necessary and is preferably dispensed with entirely. This provides a potentially more flexible method of mounting plural press rings onto the axle tube of a press consolidator, and in particular a method of mounting which is suitable to make the press rings replaceable without the need for weld removal and re-welding. This can facilitate repair and replacement or removal for other reasons, such as to interchange with press rings of alternative configuration for different conditions or function.

Since the press ring segments also engage together successively, each to its two adjacent neighbours, a press ring so mounted on the a press consolidator delivers a contiguous ring structure degree with structural integrity and rigidity that is able to perform effectively in a range of substrate consolidation scenarios and conditions.

In accordance with the invention, an annular press ring is split into a number of annular segments, each of which is mechanically engageable with its neighbours so that the segments are assembleable into a complete annular press ring. Preferably, a press ring structure comprises between three and six annular segments. Conveniently, each press ring segment making up a press ring structure is identical. This facilitates the successive engagement of a series of press rings into a contiguous ring structure. The press ring segments making up a given press ring structure are provided with mutually co-operable mechanical engagement formations at either end thereof such that in an assembled state each end of each annular segment co-operably engages with an adjacent end of an adjacent annular segment in mechanically engaged manner.

Complementary first and second engagement formations are provided on respective end portions of each pair of abutting annular segments. Each segment has a first engagement formation and one end and a second engagement formation at a second end, each first engagement formation being complementarily engageable with a complementary second engagement formation on an adjacent segment. In a convenient embodiment, the first and second end portions of each annular segment of a press ring are respectively provided with identical first and second engagement formations, such that in a complete assembled press ring structure a first engagement formation of a first end of each segment is mutually engaged with a second engagement formation of an adjacent second end of a neighbouring segment successively around the ring.

In accordance with the invention, each end portion comprises a flanged engagement portion, the respective flanged engagement portions of the ends of a pair of segments to be engaged adjacently being configured to seat one above the other when so engaged. Optionally complementary projections and recesses may be provided on or in adjacent end faces of adjacent end portions. Each annular segment is thereby provided with a first end and a second end each adapted to be co-operably mutually mechanically engageable with an adjacent end of a further segment for example in that each such end is adapted co-operably with such an adjacent end such that the two adjacent segments may be releasably fixed together, for example by a suitable lockable and releasable engagement mechanism. The assembled whole is adapted to be mountable on the elongate mounting formations for example in that each annular segment is adapted to be mountable on a distal end of at least one mounting formation such that it can be releasably fixed into place, for example by a suitable lockable and releasable engagement mechanism, so as to allow mounting and subsequent removal of press ring structures. In accordance with the invention, the flanged engagement portions define complementary first and second engagement formations on respective end portions of each pair of abutting annular segments configured co-operably to define a receiving means for a releasably engageable fixing formation. The flanged engagement portions are configured co-operably to define a through channel to receive a releasably engageable fixing formation. For example each has a recessed portion which portions respectively align when the two ends flanged engagement portions engaged. In this way the flanged engagement portions are configured co- operably to define a through channel to receive a releasably engageable fixing formation. For example each has a through aperture which apertures respectively align when the two ends are engaged.

Thus, each end portion comprises a flanged engagement portion, the respective flanged engagement portions of the ends of a pair of segments to be engaged adjacently being configured to seat one above the other when so engaged and further configured co-operably to define a receiving means for a releasably lockable engagement formation and for example to define a through channel to receive a releasably engageable fixing formation.

For example each annular segment has a first flanged engagement portion at a first end configured to seat above a complementarily formed flanged engagement portion of an adjacent segment and a second flanged engagement portion at a second end configured to seat below a complementarily formed flanged engagement portion of an adjacent segment.

Preferably each first flanged engagement portion defines a lower engagement face, each second flanged engagement portion defines an upper engagement face, and the said lower and upper engagement faces of adjacent annular segments are adapted to seat together in face to face engagement when adjacent annular segments are mechanically mounted together upon an elongate mounting formation.

Preferably each of a pair of respective lower and upper engagement faces is provided with complementary engagement structures to tend to resist lateral movement between the faces when engaged together. For example each of pair of respective lower and upper engagement faces is provided with complementary projections and recesses. For example each of pair of respective lower and upper engagement faces is provided with complementary grooves extending in a circumferential direction.

In a more complete embodiment the press ring structure is provided with a plurality of releasably engageable fixing formations configured to pass through the through channels and engage mechanically in use with a distal end portion of an elongate mounting formation thereby to engage a first end of a first segment with a second end of a second segment and simultaneously engage the two ends in mounted manner upon the distal end portion of an elongate mounting formation.

The releasably engageable fixing formations thus comprise mechanical fixing formations to retain and for example to lock each annular press ring releasably together in position on the engagement formations in use. Fixing formations in accordance with this aspect of the invention may include locking structures, for example being threaded, and for example comprising combinations of nuts/bolts and like threaded through connectors. In a preferred embodiment a first end of an annular segment and a co-operably adapted second end of a further annular segment additional comprise together, in conjunction with further fixing formations including at least such releasably engageable fixing formations, a means by which each annular segment is adapted to be mechanically mountable onto an elongate mounting formation. The annular segments are adapted as above described such that a first and of a first segment and a second end of an adjacent segment are adapted to be mounted together upon an elongate mounting formation in such manner as thereby additionally to be joined to each other. Fixing formations may be provided configured to engage a first end of a first segment with a second end of a second segment and simultaneously engage the two ends in mounted manner upon a distal end portion of an elongate mounting formation.

Advantageously this is effected in that complementary first and second engagement formations defined by the flanged portions provided on respective end portions of each pair of abutting annular segments are configured co-operably with a distal end portion of an elongate mounting formation to define a receiving means for a releasably engageable fixing formation. For example each has a recessed portion which portions respectively align when the segments are engaged on the distal end portion of the elongate mounting formation. More preferably the flanged portions of each pair of abutting annular segments are configured co-operably with a distal end portion of an elongate mounting formation to define a receiving channel to receive a releasably engageable fixing formation. For example each flanged portion has a through aperture, the distal end portion of the elongate mounting formation has a corresponding recess, and the apertures and recess are positioned respectively to align to form a continuous receiving channel when the segments are engaged.

By providing the respective flanged engagement portions as above described, complementary first and second engagement formations are defined on respective end portions of each pair of abutting annular segments. These are configured co- operably to define a receiving means for a releasably engageable fixing formation. For example each has a recessed portion which portions respectively align when the two ends are engaged. More preferably the flanged engagement portions provided on respective end portions of each pair of abutting annular segments are configured co-operably to define a through channel to receive a releasably engageable fixing formation.

Conveniently, a press ring structure comprises between three and six annular segments. Conveniently, each press ring segment making up a press ring structure is identical. Conveniently a press ring structure comprises the same number of annular segments as there are elongate mounting formations on which it is to be mounted. Most preferably each segment comprises a first end and a second end adapted to be mounted respectively on each of a pair of adjacent elongate mounting formations.

Suitable press ring structures which are formed by the plurality of annular segments of the invention when duly assembled will be familiar to those skilled in the art, and their precise configuration is not pertinent to the invention. A typical annular press ring structure comprises radially projecting substrate working formation which may for example comprise a block structure, ring structure, wedge structure, dome structure, channel structure or combination of two or more of these which extends outwardly so as to create a furrow in a surface to be consolidated. Typically, as will be familiar, a press consolidator will comprise a plurality of axially spaced press rings along at least a substantial part of its extent. Typically, a series of such press rings will be identical and evenly spaced for example. Such arrangements of press consolidator will be familiar to those skilled in the art.

In a possible case the press ring structure may comprise a radial blade formation, preferably annularly extending around the entire extent of the ring, and for example comprising an annular disc. Such an annular disc or other radial blade formation is preferably provided with a circumferentially varying edge profile, for example being notched or serrated, to facilitate rotation even in the most inclement of conditions.

In a typical convenient varying edge profile, an annular disc or other radial blade formation extends when mounted to a mean radial distance, but the edge profile is notched or serrated, for example according to a sequentially repeating pattern around the annular formation, by a varying amount either side of the mean radial distance. Typically, the annular disc formation will be notched or serrated by a varying amount either side of the mean radial distance that at its greatest extent is less than half the radial extent of the disc.

Additionally or alternatively to such a notch or serration, the radially projecting disc formation may comprise one or more drive lug projections comprising portions of the annular disc or other radial blade formation which extend substantially beyond the mean radial distance of the radial blade formation, and for example for at least the same distance again as the radial extent of the disc. A press ring formation may be provided with one or more such drive lugs. For example, one, some or all of the annular segments may comprise one or more such drive lugs. The purpose of such a drive lug is to create an extra drive to keep the assembled press consolidator roller turning in all soil types and conditions. Different numbers can be fitted for different conditions. In a possible embodiment, at least some annular segments may be interchangeably provided in two alternative forms, with and without such a drive lug, which may allow the conformation of the assembled press consolidator to be changed for different conditions. Additionally or alternatively the outwardly projecting press ring structure may comprise a wedge formation tapering from a wider base to a narrower distal portion to present a generally v-shaped projecting portion when mounted in situ, preferably annularly extending around the entire extent of the ring. Such a formation defines outwardly presented surfaces for the press ring structure that are generally v-shaped and tapered as it projects outwardly.

The wedge formation is preferably defined by at least a pair of symmetrical opposed shoulders. Conveniently the outward surfaces are either planar or convex.

In a preferred embodiment the outwardly projecting press ring structure combines both elements, for example having a wedge formation and a disc formation extending outwardly beyond it.

In a particularly preferred embodiment, the radially projecting press ring formation preferably comprises three parts, these being a central ring protruding radially to the greatest extent and a pair of shoulder portions extending therefrom from opposing sides of the ring. Preferably the shoulders are of convex design. The central ring preferably protrudes radially beyond the greatest radial extent of the shoulder portions, is preferably generally a circular annular disc, is preferably oriented generally perpendicular to the axis of the roller when mounted in situ.

In another possible case the press ring structure may comprise a channel structure and for example a generally U-shaped channel structure.

In a more complete aspect of the invention, an assembleable and dissassembleable press consolidator comprises a plurality of press ring structures each comprising a plurality of annular segments in accordance with the first aspect of the invention; and a roller assembly comprising a central axle and a plurality of ring mounting systems laterally spaced along the axle, each ring mounting system comprising a plurality of elongate mounting formations extending outwardly and for example radially from the axle, and each having a distal end adapted for mounting engagement with one of the press ring structures and for example with one or more segments of the same. The ring mounting system may for example comprise a plurality of elongate axle arms. The elongate formations may extend from an inner ring by means of which the press ring structure is mounted on the axle.

More completely in this embodiment therefore, an assembleable and dissassembleable press consolidator comprising a plurality of press ring structures in accordance with the foregoing, each provided with a corresponding plurality of releasably engageable fixing formations;

and a roller assembly comprising a central axle and a plurality of ring mounting systems laterally spaced along the axle, each ring mounting system comprising a plurality of elongate mounting formations extending outwardly from the axle, and each having a distal end;

wherein each fixing formation has a projecting portion configured to pass through said through channel and engage mechanically in use with a distal end of an associated elongate mounting formation thereby to engage a first end of a first segment with a second end of a second segment and simultaneously engage the two ends in mounted manner upon the distal end portion of an elongate mounting formation.

An assembled press ring is attached to the roller assembly via the distal end of the plurality of elongate mounting formations making up a corresponding mounting system by means of suitable releasable mechanical fixing formations. The mechanical fixing formations may be provided as separate structures co-operating with the press rings and the mounting system to attach the former to the latter and/or may be integrally formed with ring segments and/or may be integrally formed with the mounting formations.

Each press ring segment is thus adapted to be mountable on a mounting system, for example by releasable mechanical fixing formations associated with the press ring and/or mounting system and/or discretely provided, so as to be releasably lockable thereon for use and the press ring is thereby stably but removably positioned on the mounting system.

This is effected in accordance with preferred embodiment of the invention in that each press ring segment flanged portion has at least one through aperture configured to seat on a projection on a distal end of a mounting formation and to receive a through fixing member to attach the press ring to the mounting formation.

The mechanical fixing formations preferably comprise a means to lock each annular press ring releasably in situ on a mounting system in such a manner that it is rigidly mechanically engaged thereto for use.

Suitable mechanical fixing formations may include one or more of the following:

complementary projections/recesses to locate a ring or ring segment on the distal ends of the mounting formations of the mounting system;

through apertures in a ring or ring segment to receive a projection extending radially outwardly from the distal ends of the mounting formations of the mounting system; through apertures in a ring or ring segment to receive a separate fixing structure whereby the ring or ring segment may be engaged on to the distal ends of the mounting formations of the mounting system.

Fixing formations in accordance with this aspect of the invention may include locking structures, for example being threaded, and for example comprising combinations of nuts/bolts and like threaded connectors which may be in suitable combination integrally formed with and/or separate from the mounting system or ring segments.

Complementary first and second engagement formations are defined by the flanged portions provided on respective end portions of each pair of abutting annular segments configured co-operably to define a receiving means for a releasably engageable mechanical fixing formation configured to engage with the distal end of an elongate mounting formation and thereby engage the respective end portions onto the elongate mounting formation.

For example each has a recessed portion which portions respectively align when the two ends are engaged. More preferably the flanged portions provided on respective end portions of each pair of abutting annular segments are configured co-operably to define a through channel to receive the releasably engageable mechanical fixing formation. For example each has a through aperture which apertures respectively align when the two ends are engaged. Each end portion comprises a flanged engagement portion, the respective flanged engagement portions of the ends of a pair of segments to be engaged adjacently being configured to seat one above the other when so engaged and further configured co-operably to define a receiving means for the releasably lockable mechanical fixing formation and for example to define a through channel to receive a releasably engageable mechanical fixing formation.

The releasably engageable mechanical fixing formations thus comprise a means to lock each annular press ring releasably onto the elongate mounting formations each acting to engage a first end of a first segment with a second end of a second segment and simultaneously engage the two ends in mounted manner upon a distal end portion of an elongate mounting formation.

Advantageously this is effected in that complementary first and second engagement formations defined by the flanged portions provided on respective end portions of each pair of abutting annular segments are configured co-operably with a distal end portion of an elongate mounting formation to define a receiving means for a releasably engageable mechanical fixing formation. For example each has a recessed portion which portions respectively align when the segments are engaged on the distal end portion of the elongate mounting formation. More preferably the flanged portions provided on respective end portions of each pair of abutting annular segments are configured co-operably with a distal end portion of an elongate mounting formation to define a receiving channel to receive a releasably engageable mechanical fixing formation. For example each flanged portion has a through aperture, the distal end portion of the elongate mounting formation has a corresponding recess, and the apertures and recess are positioned respectively to align to form a continuous receiving channel when the segments are engaged.

Conveniently a distal region of the projecting portion of each fixing formation is adapted to engage mechanically with a distal end portion of a corresponding elongate mounting formation.

For example the projecting portions of each fixing formation and the distal end portions of each elongate mounting formation are provided with complementary releasably engageable mechanical fixing formations. For example the projecting portions of each fixing formation and the distal end portions of each elongate mounting formation are provided with complementary threaded engagement formations. In a possible embodiment each distal end portion of the elongate mounting formation has a recess corresponding to the through aperture defined by each pair of respective flanged engagement portions of the ends of a pair of segments to be engaged adjacently, and the aperture and recess are positioned respectively to align to form a continuous receiving channel when the segments are engaged.

Conveniently the recess defines a formation adapted for releasable mechanical engagement with an end formation of the projecting portion of a mechanical fixing formation received therein. For example the recess and the end formation of the projecting portion of the fixing formation are complementarily threaded.

In an alternative embodiment the recess defines a housing for an insertable retention formation, and the end formation of the projecting portion of the fixing formation and the retention formation are adapted to be releasably mechanically engageable together.

For example the retention formation and the end formation of the projecting portion of the fixing formation are complementarily threaded.

In a possible embodiment the fixing formation is a nut and the retention formation is a bolt.

It is the key to the invention that regardless of the precise mechanism chosen for such fixing formations, they fix the assembled annular press ring structures in situ on the mounting system in mechanically rigid manner for use, but in a manner which is releasable to allow the subsequent removal of the press ring structures. The provision of such mechanical fixings may obviate the need for any welded joint, and thus simplify removal, for repair and replacement for example. Typically, after a few years when the press ring structures have suffered excessive wear, the fixing formations may be released allowing the rings to be removed and replaced with ease.

In a typical arrangement, as will be familiar, a row of press ring structures is provided arrayed along the axle. Preferably, all of the press rings in a row are arranged to extend outwardly in parallel planes, and in particular in planes perpendicular to the axis of the roller defined by the axle.

Preferably, press ring structures are generally evenly spaced axially along the axle when so arrayed. Preferably, each press ring in a row has a similar size and profile. For example the press ring structures are identical and evenly spaced when so arrayed.

The roller assembly is adapted to receive a plurality of mounted press ring structures so axially arrayed along at least a substantial part of its length for example by being adapted by provision of or to co-operate with suitable fixing formations as above described.

This aspect of the invention encompasses the above mentioned segmented annual press ring structures and /or roller assembly and/or integral or separate fixing formations in any combination for example as a kit of parts. This aspect of the invention additionally comprises a press consolidator roller assembled from such a combination of annular segments and roller assembly and integral or separate fixing formations.

In accordance with the first aspect of the invention a press ring structure is adapted to be mounted upon a press consolidator axle assembly of the type comprising a central axle formation and a plurality of elongate mounting formations extending outwardly from a surface of the central axle. In accordance with a further aspect an assembleable and dissassembleable press consolidator comprises a plurality of press ring structures each assembleable onto such a press consolidator axle assembly.

Each mounting formation extends outwardly from a central axle formation and defines a mounting location for a pair of press ring segments at a distal end thereof in the manner above described. For example each mounting formation extends radially outwardly from a central axle formation. Each mounting formation thus serves as a spoke extending between a central axle formation and a press ring structure assembled thereon in use.

A ring mounting system comprising an array of mounting formations, for example a radially disposed array, is provided for association with each assembleable press ring structure of the first aspect of the invention. For example an array of three to six mounting formations is provided for mounting each press ring structure. In a preferred embedment an array of four mounting formations is provided for each press ring structure. Each mounting formation in such an array is preferably identically and the mounting formations are preferably arrayed in evenly spaced manner. Each mounting formation comprises an elongate structure extending outwardly from a surface of the central axle to a distal location for mounting a pair of press ring segments. Each elongate mounting formation is preferably not a simple flat section structure but is rather an extending rod-like structure. That is to say, each elongate mounting formation is not planar in cross-section, but has a substantially two- dimensional structure, and is for example circular, elliptical or polygonal. This two- dimensional structure offers much improved rigidity to the assembled whole, and allows relatively heavier weight press rings to be carried. The rod-like elongate mounting formation may be a solid rod, but in the preferred case is a hollow tube. In a further aspect of the invention, a press consolidation system comprises a chassis having mountable thereon at least one press consolidator assembly (i. e. at least one roller comprising a roller assembly and mounted projecting press ring structures) as above described. A plurality of press consolidators as above described may be serially mounted in train upon such a chassis so as to act sequentially on the soil or other substrate when drawn thereacross. Other cultivation units having other functionality may be serially mounted in train on the chassis with the one or more press consolidator roller assemblies to provide other sequential functionalities as the whole chassis assembly is drawn across a substrate. For example, primary or secondary cultivators or the like may be provided. Each press consolidator assembly is preferably mounted on a pair of bearings on the chassis, enabling the entire consolidator assembly to revolve freely. The press consolidator is drawn across the substrate in use. This might be effected in that the chassis may comprise an integral vehicle provided with drive means to enable it to be driven across a surface to be consolidated and/or in that the chassis may comprise part of a trailer structure to enable it to be towed there across. In particular, the chassis comprises a trailer structure, with means provided to engage a forward part thereof with the towing apparatus of a suitable towing vehicle, such as a tractor or the like. Road wheels may be provided on such a trailer deployable from a road engaging position whereat the press consolidator and any other assemblies upon the chassis are lifted above the surface for road use, and a stowed configuration whereat the wheels are out of the way allowing the press consolidator and any other assemblies upon the chassis are in position to engage the surface of the substrate to be consolidated.

The press consolidator of the invention can be fitted and retrofitted into a wide range of primary/secondary cultivation machines, this will allow for pressing and firming to a higher quality with a lower power requirement than any current land press.

Although the invention is discussed in the context of cultivation, it can be applied wherever substrate levelling with conditioning is required. Other uses for the press consolidator may easily be envisaged. For example the press consolidator may be used in construction, for road building or road levelling or in any similar form of ground levelling or the like.

In accordance with the invention is a further aspect, a method of assembly of a press consolidator comprises the steps of:

providing a plurality of annularly segmented press ring structures in accordance with the first aspect of the invention;

providing a roller assembly comprising a central axle and a plurality of ring mounting systems laterally spaced along the axle, each ring mounting system comprising a plurality of elongate mounting formations extending outwardly and for example radially from the axle, and each having a distal end adapted for mounting engagement with one of the press ring structures and for example with one or more segments of the same;

assembling a plurality of annularly segmented press ring structures in accordance with the first aspect of the invention into a plurality of complete press rings and mounting the assembled press ring structure into position on a corresponding plurality of ring mounting systems;

fixing the press ring structures into position thereon, in particular so as to releasably rigidly lock them in position. In accordance with a further aspect of the invention, a method of repair of a press consolidator assembled in accordance with the foregoing aspect of the invention is provided, comprising the steps of:

releasing and removing any press ring structures that it is intended to replace;

providing replacement segmented press ring structures;

fixing these into place in accordance with the foregoing method.

The invention will now be described by way of example only with reference to the accompanying drawings in which:

Figures 1 and 2 show a perspective view of a press consolidator roller embodying the principles of the invention in part assembled configuration;

Figures 2a and 2b show detail of optional preferred mounting and flange joint stabilising mechanisms for the embodiment of figures 1 and 2;

Figure 3 shows a perspective view of another embodiment of roller with an alternative press ring configuration;

Figures 3a and 3b show detail of optional preferred mounting and flange joint stabilising mechanisms for the embodiment of figure 3;

Figure 4 shows a perspective view of another embodiment of roller with an alternative press ring configuration;

Figures 4a and 4b show detail of optional preferred mounting and flange joint stabilising mechanisms for the embodiment of figure 3.

Referring to figures 1 and 2, an example press consolidator is shown for use as a packer press cultivator. The press consolidator comprises a roller assembly on which can be mounted a plurality of modular press rings made up or arcuate segments. The roller assembly includes a central axle tube 1 provided with a plurality of mounting systems on which press rings can be mounted spaced along the axle tube 1 , each in the form of four elongate rigid radial spokes 3 evenly spaced around and extending outwardly from the outer surface of the axle tube 1.

Press rings made up of arcuate segments 5 are mounted onto the distal ends of these elongate extending spokes 3 such that in the assembled state a regular array of press ring structures spaced axially along the axle is provided. The extending spokes thereby constitute an array of elongate mounting formations in accordance with the principles of the invention, each defining a mounting location at a distal end.

A press ring in the embodiment represented in figures 1 and 2 comprises a u-shaped channel structure. Each arcuate segment 5 is a segment of such a u-shaped channel structure. The segments 5 as assembled together make up a complete circumferentially extending press ring structure with a u-shaped channel. Such press ring structures will be familiar. The invention is not limited to a particular configuration of press ring. An alternative press ring configuration is illustrated in figure 3, in which the press ring comprises a radially extending primary central disc and convex shoulder portions which together form a wedge like structure. In the illustrated embodiment the central disc is given a serrated edge to assist with bite in difficult and heavy conditions. Arcuate segments 5a make up the complete press ring structure.

Figure 4 illustrates a further alternative configuration of press ring structure without such an extending serrated disc. Arcuate segments 5b make up the complete press ring structure.

Except as regards the structure of the respective arcuate segments 5, 5a, 5b the three example embodiments are presented as essentially equivalent, with equivalent methods of assembly onto the distal ends of the elongate extending spokes 3, and where applicable like references numerals are used for equivalent components across the three embodiments. Indeed, it may be an advantage of such an arrangement that multiple alternative sets of press rings of alternative surface conformance may be interchangeably provided. However, it will be understood that these common methods of assembly are presented by way of example only in the particular embodiments.

In all three example embodiments each annular press ring formation is split into four segments which together make up an assembled whole when assembled in mounted manner onto the projecting spokes 3, of whish there are four in the embodiments illustrated. In the illustrated embodiments, a mounting mechanism is shown in a particularly preferred configuration which enables the segments to be simultaneously fixed together to form a complete press ring structure and mounted upon the projecting spokes.

Each press ring segment has a first flange portion 7a at a first end and a second flange portion 7b at a second end, such that with the segments arranged successively into a complete ring each flange portion 7a seats above each flange portion 7b successively around the ring. A lower engagement face of the upper flange portion 7a seats upon an upper engagement face of the lower flange portion 7b. In the embodiments respectively show in Figures 1 and 2, figure 3, and figure 4, the respective engagement faces of the upper flange portion 7a and of the lower flange portion 7b are simple planar faces. In a modification of this simple system, the respective engagement faces may be modified to enhance and stabilise the engagement between them, especially in a lateral direction.

A possible mechanism for each embodiment is shown in respective figures 2b, 3b and 4b. In each of these figures, an upper engagement face 19a of a flange portion designed to seat underneath and a lower engagement face 19b of a flange portion designed to seat above are complementarily grooved with grooved formations extending in a circumferential direction.

Both flange portions 7a and 7b have through apertures positioned to be aligned to form a single through channel aperture when the flange portion 7a seats correctly in position over the flange portion 7b. A distal end of each spoke 3 is provided with a receiving formation 13 to receive a mechanical fixing. The receiving formation includes a recess. An engagement formation in the form of a mechanical through fixing passes through the apertures in the respective flange portions 7a, 7b of the positioned adjacent segments 5 and engages into the recess in the receiving formation 13 at the distal end portion of the radial spoke to effect a fixing engagement both between the two flange portions of the adjacent segments and of the two flange portions into position on the receiving formation 13. The mechanical through fixing thereby engages a first end of a first segment with a second end of a second segment and simultaneously engages the two ends in mounted manner upon the distal end portion of the spoke.

The result is the simultaneous assembly and mounting of the modular ring into position in a rigid retained manner, but in a manner which allows for its removal for example for repair or replacement. The mechanical through fixing releasably engages with the recess in the receiving formation. Suitable mechanical through fixings might include threaded connectors for example cooperatively threaded with threaded receiving recesses in the receiving formations 13. A conventional form of fastening might for example include a receiving mount on the distal end of each spoke 3 in the form of a cylindrical threaded bush for example welded to the distal end of each spoke 3 and threaded to receive a threaded bolt which passes through the two apertures in the flanges to retain the segments mountedly in position.

However, in the harsh environmental conditions in which a press consolidator data may be used, there is a danger that a standard threaded bolt and bush may become rusted together. Accordingly, in the preferred case a threaded connector in the form of a nut and bolt with a nut retention mounting provided at a distal end of each spoke 3 is desirable. An embodiment of such a system is illustrated for each for each embodiment is shown in respective figures 2a, 3a and 4a

In these figures, a receiving formation 13 on a distal end of each spoke 3 comprises a boss 13a with a machined recessed part that holds a standard nut 15a with a slot provided inside the boss allowing the nut to be inserted and removed. Engagement is effected by threading a bolt 15a onto the nut through the apertures in the respective flanged portions of the segments.

When each segment is bolted down in this manner, the overall press ring structure is rigidly locked together and rigidly retained in position on the mounting ends of the spoke 3, but can be released if desired by unscrewing of the bolts.

The assembly offers improved functionality in relation to repair and replacement of worn press rings. For example, after a few years, when the press ring structure is showing unacceptable signs of wear, it is a simply matter to unscrew the bolts allowing the ring segments to be removed and replaced. There is no need to provide a welded joint between the spokes and the ring, and consequently when the rings are to be replaced there is no requirement to remove existing welds and re-weld new rings from scratch. Repair and replacement of rings is facilitated.

Additional functionality may also be offered in that modular press rings may be replaced. Different press ring structures such as those shown respectively in figures 2, 3 and 4 may be made interchangeable, and exchanged depending on requirement.