Patent Description:
Conventionally, it is known to provide pollination bags to control plant pollination, such as the pollination bag described in <CIT>. The bag defines an interior and one or more openings which can be closed or restricted. In use, the bag is located over a reproductive part of the plant to provide a barrier to the movement of pollen. However the bag is formed of a material which is relatively flexible and can be relatively easily deformed so that plant damage can occur if the material is moved (eg by a person, an animal or by weather conditions). Also, similarly, damage can occur when fitting and removing the bag. In some situations, pollination control is required over a relatively large plant or an area of planting which can be inefficient with relatively small bags.

<CIT>, <CIT>, <CIT>, <CIT> and <CIT> illustrate examples of portable greenhouses.

In this specification, the terms inner, outer, inwardly and outwardly, when used in relation to the structure, are used with respect to the interior, which is inward of the structure, and the terms upward and downward are used in relation to the in use orientation of the structure, in which downward means down towards the ground.

According to a first aspect of the invention, there is provided a pollination control structure comprising a support, a plurality of support fixings and a barrier member. Each support fixing is attached to or integral with the support. The barrier member comprises a plurality of barrier member pieces. At least one of the barrier member pieces is fixed to at least one of the support fixings by an intermediate fixing, also referred to as a barrier member fixing, that offsets the barrier member piece from the support fixing, wherein the at least one barrier member piece is releasably attached to the intermediate fixing, and the intermediate fixing is releasably attached to the support fixing. The barrier member pieces are suspended entirely within openings defined between the support fixings and are arranged such that they do not overlap the support.

Providing an intermediate fixing between a barrier member piece and the support is advantageous, because it allows for the barrier member piece to be removed from the support without having to adjust or alter the engagement between the intermediate fixing and the support. The intermediate fixing allows the support to be customised for releasable attachment to a barrier member piece, without the support members themselves being specifically designed for this purpose.

At least one of the barrier member pieces may comprise at least one releasable fastening defined along at least one edge of the barrier member piece for releasably attaching the barrier member piece to the intermediate fixing.

In this way, an edge of at least one barrier member piece can be pulled away from the support, for example to provide an access opening in the form of a door or window.

In some embodiments, each edge of some or all of the barrier member pieces includes a releasable fastening. In this way, the barrier member piece can be fully removed from the support when required, for example to be repaired and/or replaced. The releasable fastenings may extend along substantially the entire length of the edge region on which they are provided to provide a well-sealed and thus well controlled environment in the interior of the pollination control structure.

In the assembled structure, the releasable fastenings may be positioned adjacent the support fixings. The barrier member pieces are suspended entirely within openings defined between the support fixings that make up the support. The barrier member pieces do not overlie, overlap, or otherwise contact the support fixings.

The intermediate fixings offset the barrier member pieces from the support fixings, so as to avoid abrasion caused by rubbing of the barrier member pieces against the support. The barrier member pieces may comprise a non-woven material. The intermediate fixings may comprise a stronger, more durable material than the barrier member pieces.

The releasable fastenings may comprise hook or loop material for releasably engaging with complementary hook or loop material of the intermediate fixing. When this type of fastening is provided along each edge of a barrier member piece, the barrier member piece may be removed from the support simply by pulling the piece away from the support.

At least one of the support fixings may comprise a channel and at least one of the intermediate fixings may comprise a bead formation that slidably locates in the channel to releasably attach the intermediate fixing to the support fixing. In this way, the releasable attachment between the intermediate fixing and the barrier member piece may be easier to disengage than the releasable attachment between the intermediate fixing and the support. In some cases, some or all of the intermediate fixings may be attached to the support on assembly of the support, and may remain attached to the support up until the support is disassembled e.g. prior to storage of the structure or reassembly of the structure in another location or arrangement. Some or all of the barrier member pieces may be detached from the intermediate fixing to be repaired or replaced one or more times between assembly and disassembly of the structure. For example, when a panel is damaged or worn, a user may simply detach the barrier member piece from the structure, whilst leaving the intermediate fixing in place and ready for attachment of a new (or repaired) barrier member piece.

At least one of the barrier member pieces may comprise a non-woven material. At least one of the barrier members pieces may comprise a different material from at least one other barrier member piece. In this way, different materials can be used for different parts of the barrier member. This is useful because it may be beneficial for some parts of the barrier member to be formed of a tougher, more robust material, for example, and for other parts of the barrier member to be formed of a more fragile material (e.g. with better or specific properties for pollination control for a given situation).

In embodiments in which some or all of the barrier member pieces are formed of different materials, it is especially advantageous that the system allows for easy removal and replacement of individual panels or pieces of barrier member. This is because different barrier member pieces may be replaced at different intervals such that, for example, more fragile barrier member pieces can be replaced more frequently than tougher more durable barrier member pieces. This saves on materials and costs, as parts of the barrier member which are not damaged or worn need not be replaced simply because another area of the barrier member is damaged or worn.

At least one of the barrier member pieces may comprise a skirt extension for contacting a ground surface on which the structure is installed in a substantially continuous contact line around an interior of the structure. Weighting means may be provided on top of, within, or integral with the skirt extensions when the structure is assembled/installed on the ground surface. In this way, the skirt extensions help to ensure that the interior of the pollination control structure is fully enclosed, and that pollen cannot enter in an uncontrolled manner through, for example, gaps between the base of the support and the ground on which the structure is assembled. This may be especially important when the structure is installed on an uneven ground surface where significant gaps may exist between the base of the support and the ground surface. The weighting means help to improve the contact between the skirt extensions and the ground surface, protect against the skirt extensions being blown up in windy weather conditions to expose gaps between the structure and the ground surface, and act as an additional anchoring means for the structure.

The support may comprise a plurality of support members held together by connection arrangements that are arranged to permit assembly, disassembly and re-assembly of the support. Each support fixing may be attached to or integral with a support member of the support.

Each support member may comprise four generally rectangular side faces and two generally square end faces. Each side face may comprise a channel for receiving an intermediate fixing. Each connection arrangement may comprise a substantially flat plate having three attachment portions arranged such that, in an assembled condition, support members attached at the attachment portions are angled at <NUM> degrees to each other.

In another aspect, the invention resides in a method of assembling a pollination control structure comprising a support and a barrier member, the support comprising a plurality or support members and the barrier member comprising a plurality of barrier member pieces. The method comprises: assembling the support from the support members; attaching at least one support fixing to the support and/or forming at least one support fixing integrally with the support; attaching at least one intermediate fixing to the support using a releasable fastening; and attaching at least one of the barrier member pieces to at least one of the intermediate fixings using a releasable fastening to suspend the barrier member piece entirely within an opening defined between the support fixings such that the barrier member piece does not overlap the support.

Also described is a kit of parts for assembling a pollination control structure, the kit of parts comprising: a plurality of support members; a plurality of barrier member pieces; and at least one intermediate fixing configured for releasable attachment to at least one of the barrier member pieces and at least one of the support members, and configured to offset the barrier member piece from the support member to suspend the barrier member piece entirely within an opening defined between support members such that the barrier member piece does not overlap the support.

Also described is a pollination control structure comprising a barrier member and a support that together define an enclosure, wherein the barrier member is supported by the support and comprises at least one barrier member piece comprising a non-woven material.

Non-woven material is relatively fragile compared to other materials which may be used for pollination control structures, such as mesh or plastic. However, non-woven material may have significantly better pollination control properties for certain situations, e.g. when used with certain types of plant.

The or each barrier member piece is releasably fixed to the support. The or each barrier member piece may have a length that is less than or equal to <NUM> metres and a width that is less than or equal to <NUM> metres.

Fixing the barrier member with respect to the support, rather than simply providing the barrier member as a cover that sits on/over the support, reduces abrasion between the barrier member and the support and enables more fragile materials, e.g. non-woven materials, to be used for the barrier member than would otherwise be possible. This is useful because it allows the barrier member material to be chosen based, to a greater extent, on its pollination control properties, rather than on its strength, because the likelihood of damage and excessive wear is reduced.

Limiting the dimensions of the barrier member pieces enables more fragile materials to be used than would be possible for larger barrier member pieces, which would be exposed to more wind pressure in use. It has been found that relatively fragile non-woven materials can withstand higher wind pressures relatively well when the dimensions of the barrier member pieces do not exceed <NUM> metres x <NUM> metres.

Thus, by providing the barrier member in pieces or panels of limited dimension and fixing each piece with respect to the support, the amount of wear and likelihood of damage (e.g. caused by stress on the material caused by windy weather) to the barrier member pieces is reduced, thus allowing a relatively fragile non-woven material to be used for some or all of the barrier member.

At least one of the barrier member pieces may be formed of a different material from at least one other barrier member piece.

At least one of the barrier member pieces may comprise a skirt extension for contacting a ground surface on which the structure is assembled or installed in a substantially continuous contact line around an interior of the structure when the structure is assembled or installed on the ground surface. In this case, the skirt extension may be releasably attached to, and extend from, a support member that defines at least part of a base of the structure. Weighting means may be provided on top of, within, or integral with the skirt extensions when the structure is assembled or installed on the ground surface.

The support may comprise a plurality of body support members and a plurality of roof support members. The body support members may define side and end wall parts of the support, and possibly a base part, and may be relatively rigid to provide a sturdy and robust frame for the pollination control structure. The roof support members may define a roof part of the support. At least one of the roof support members may be relatively flexible, and may specifically be more flexible than the body support members. Providing roof support members having some flexibility allows for a degree of movement of the roof in high winds, for example, thereby removing some of the pressure on the flexible barrier material in this scenario.

In some examples, the relatively flexible roof support members may be curved, so as to advantageously direct wind up and over the structure to again help to reduce the pressure on the barrier member material during windy weather conditions.

At least one of the barrier member pieces may be releasably fixed to the support by an intermediate fixing that slidably locates in a channel of the support to releasably attach the barrier member piece to the support. The barrier member piece is releasably attached to the intermediate fixing.

There is also described a plant pollination control structure, the structure including a relatively rigid support and a relatively flexible barrier member, the barrier member being supported by the support, the barrier member defining an interior.

Possibly, the support is located in the interior.

Possibly, the structure is arranged to substantially prevent the passage of particles such as pollen into the interior.

Possibly, in use, the support is free standing, and may be free standing independent of the barrier member. Possibly, in use, the support locates on a ground surface.

Possibly, the barrier member is not free standing. Possibly, in use, the barrier member contacts the ground surface in a substantially continuous contact line around the interior. Possibly, in use, the barrier member and the ground surface together form a substantially continuous enclosure around the interior.

Possibly, in use in an installed condition, a part of a plant is located in the interior, and another part of the plant may be located in the ground surface.

Possibly, the barrier member defines an opening to permit access to the interior.

Possibly, the opening is a door opening or a window opening.

Possibly, the barrier member includes a window area, which may be formed of transparent material to enable viewing of the interior.

Possibly, the barrier member includes a closure arrangement which is movable between an open condition in which the closure arrangement permits access to the interior and a restricted condition in which the closure arrangement restricts or prevents access to the interior through the opening.

Possibly, the barrier member comprises a material, which may be non-woven and may comprise a synthetic polymer, which may comprise one or more of polyester, polypropylene and/or polyvinylchloride. Possibly, the material comprises a mesh.

Possibly, the support is formed of a plastics material and may be formed by moulding. Possibly, the support is formed of a metal material, possibly steel or aluminium, or a combination of plastics and metal.

Possibly, the support includes a plurality of support members, which are held together by connection arrangements. Possibly, the connection arrangements are arranged to permit assembly, disassembly and re-assembly of the support, and may permit assembly, disassembly and re-assembly without the use of tools, or without the use of specialist tools, and/or by unskilled operatives. Possibly, the support members and the connection arrangements are held together by push fit action and may be secured by locking arrangements which may comprise pins, screws or similar.

Possibly, one of the support members or the connection arrangements defines a socket recess and the other of the support members or the connection arrangements includes a projecting part which, in the assembled condition, may be receivable in the socket recess.

Possibly, the support members are elongate.

Possibly, the connection arrangements comprise corner joint connectors, each of which may define a plurality of the socket recesses, which may be angled relative to each other, and may be angled at <NUM>° relative to each other.

Possibly, each support member includes one or more of the projecting parts, each of which may comprise an end of the support member and which, in the assembled condition, may be received in one of the socket recesses of one of the corner joint connectors.

Possibly, the connection arrangements comprise a straight connector, which may connect two of the support members together in line. Possibly, the straight connector comprises a body and two of the projecting parts which extend in opposite directions from the body.

Possibly, each support member defines one socket recess at each end, in which, in use, one of the straight connector projecting parts is receivable in the assembled condition.

Possibly, each support member is tubular and may be hollow, possibly in the form of a pipe. In some embodiments, at least some of the support members that define a roof of the structure take the form of hollow plastic pipes or piping, for example medium density polyethylene (MDPE) water piping. This provides the roof of the structure with a degree of flexibility that allows for some movement of the roof, e.g. in windy weather conditions. This is useful to reduce the pressure felt by the barrier member in such conditions.

Possibly, the support members are circular in cross-section. Possibly, the connection arrangements are rounded.

Possibly, the structure has a length, a width and a height.

Possibly, the structure height is greater than its width and may be greater than its length. Possibly, the width and the length are substantially the same.

Possibly, the structure has a plurality of horizontal cross-sectional interior areas at different distances up its height. Possibly, the horizontal cross-sectional areas are substantially the same at all of the distances up the height.

Possibly, the structure comprises a roof, two side walls and two end walls. Possibly, the structure does not comprise a floor.

Possibly, the horizontal cross-sectional areas are substantially the same at all of the distances up the height, up to the top of the side walls.

Possibly, the roof is substantially planar, and in the installed condition may be substantially horizontal. Possibly, all of the side walls and the end walls are substantially the same size. Possibly, all of the side walls and the end walls are substantially planar and in the installed condition may extend substantially vertically.

Possibly, the support comprises a base part, side wall parts, end wall parts and a roof part. Possibly, each of the base part, the side and end wall parts and the roof part is substantially planar. Possibly, the base part and the roof part each comprise four corner joint connectors with four equal lengths of support members extending therebetween. Possibly, the side and end wall parts comprise four equal lengths of support members extending between the corner joint connectors of the base part and the roof part. Possibly, all of the support members are straight.

Possibly, the barrier member comprises a roof part and side and end wall parts, which may locate against or alongside, respectively, the roof part and the side and the end wall parts of the support.

Possibly, the barrier member includes securing features to secure the structure to the ground surface in the installed condition. Possibly, the securing features comprise skirt extensions, which may extend outwardly from the side and end wall parts, possibly from a lower edge of each of the side and end wall parts, possibly at the level of the base part, possibly formed of the same material as the barrier member, possibly formed integrally as part of the barrier member.

Possibly, one of the side or end wall parts defines a window opening, through which, in use in the installed condition, a reproductive part of a plant located in the interior may be accessible and/or through which pollen may be introduced to the interior.

Possibly, the barrier member is formed to a shape to fit over the support and may be pre-formed to the shape. Possibly, the pre-formed shape is in the form of a cuboid.

Possibly, in a pre-assembly condition, the barrier member is formed of flat sheet material. Possibly, the sheet material is formed into a bag, which may have a single upper edge with two upper corners and two lower open edges which define an opening.

Possibly, in the installed condition, the bag is folded and each of the two upper corners may be fastened by a fastening to a different one of the barrier member side wall parts.

Possibly, the structure defines a floor opening, through which, in use in moving to an installed condition, a plant or plant part passes to locate in the interior in the installed condition.

Possibly, in use, in moving to the installed condition, the structure is located over a plant, which may be rooted in a ground surface material.

Possibly, in use, in moving to the installed condition, the support is firstly located over the plant and then the barrier member may be located on the support, over the plant.

Possibly, the barrier member is formed to the shape to fit over the support in situ.

Possibly, the barrier member is provided as a single piece and formed from a single piece of material.

Possibly, in the assembled condition, the structure height is no more than <NUM>, and desirably no more than <NUM>, possibly no less than <NUM> and desirably no less than <NUM>.

Possibly, in the assembled condition, the structure width and/or the structure length is no more than <NUM>, and desirably no more than <NUM>, possibly no less than <NUM> and desirably no less than <NUM>.

Possibly, the barrier member is not fixed to the support, but may be held in position by virtue of its shape and fit to the support, and possibly by the securing features.

Possibly, the structure roof includes an apex line, which may be aligned parallel to the structure length.

Possibly, the structure includes a pair of side walls and a pair of end walls.

Possibly, the structure roof is curved and may be curved convexly from top of the side walls to the apex line.

Possibly, the end walls extend upwardly to the apex line.

Possibly, one of the side walls or the end walls defines the window opening.

Possibly, one of the side walls or, more desirably, one of the end walls, comprises an opening wall which may be arranged to provide a person access opening to permit access for a person to the interior. Possibly, the opening wall includes a pair of parts which may be movable between a closed condition and an open condition to provide the person access opening. Possibly, the opening wall includes a securing arrangement to secure the opening wall parts in the closed condition. The securing arrangement may comprise a hook and loop (or fleece) fastening, which may be releasable, and may extend substantially a greater portion of, or the whole, height of the respective side or end wall, and may extend substantially the whole height of the structure.

Possibly, the roof support part includes curved roof support members and may include one or more lines of straight support members. The straight support members may comprise cross members which extend across the interior; may include apex support members which substantially extend along the apex line; and may include roof bracing members which extend from the cross members upwardly to the apex support members.

Possibly, the straight support members are provided in a module length, which may be <NUM>, and which length may determine the width of the structure, possibly the length of the structure (which may comprise more than one module length) and possibly the height of the structure side walls.

Possibly, the structure has an apex height, a side wall height, a width and a length.

Possibly, the structure has a length which is greater than its apex height, which may be greater than its width, which is substantially the same as its side wall height.

Possibly, the structure length is no more than <NUM>, and desirably no more than <NUM>, possibly no less than <NUM> and desirably no less than <NUM>.

Possibly, the apex height is no more than <NUM>, and desirably no more than <NUM>, possibly no less than <NUM> and desirably no less than <NUM>.

Possibly, the width and/or the side wall height is no more than <NUM>, and desirably no more than <NUM>, possibly no less than <NUM> and desirably no less than <NUM>.

The structure includes a barrier member fixing arrangement to fix the barrier member to the support. The barrier member comprises a plurality of barrier member pieces, which may be separate from each other, each of which is fixed, possibly separately, to the support.

Possibly, the barrier member fixing arrangement includes at least one support fixing, which, in the assembled condition, may be fastened to the support by fasteners such as bolts or screws. Possibly, the or each support fixing is elongate and may fastened to one of the support members and may extend substantially a greater part of the length of the respective support member.

Possibly, each support fixing comprises a channelling formation, which may be elongate. Each channelling formation may extend the full length of the respective support fixing.

Possibly, the channelling formation defines a channel which may extend along the full length of the channelling formation. Possibly, each channel comprises a bore which extends along the length of the channel and may comprise a slot opening which also extends along the length of the channel and extends laterally outwardly to permit access to the bore. Possibly, the slot opening has a width and the bore has a width, and the width of the slot opening is less than the width of the bore. The bore may be circular in cross-section and the width of the bore may be the diameter of the bore.

Possibly, each support fixing comprises two channelling formations, which are arranged so that the slot openings face away from each other in opposite directions.

The barrier member includes a barrier member fixing, also referred to as an intermediate fixing, which in an assembled condition may engage with one of the support fixings to fix the barrier member to the support. In moving from a disassembled condition to an assembled condition, each barrier member fixing may slidably engage with one of the support fixings.

The barrier member fixing is releasably attachable to the respective barrier member piece.

Each barrier member fixing may comprise a bead formation or rod, which in the assembled condition locates in the bore, and may slidably locate in the bore. Possibly, the bead formation is circular in cross-section, and may be elongate, and may form an edge of the barrier member or barrier member piece. Possibly, the bead formation has a cross-section dimension which is greater than the slot width, so that the bead formation cannot easily pass through the slot opening in a lateral direction. Possibly, the bead cross-section dimension is a diameter of the bead formation.

Possibly, one or more of the barrier member pieces includes two spaced apart barrier member fixings which extend along two edges of the respective barrier member piece, which edges may be parallel and may face oppositely away from each other.

Possibly, the support includes two spaced apart support fixings, which may be parallel and may face towards each other.

Possibly, in moving to the assembled condition, the two barrier member fixings engage the two support fixings substantially simultaneously and slide therealong simultaneously.

Possibly, the support comprises a single module frame, which may comprise two single module frame side wall parts, two single module frame end wall parts and a single module frame roof part.

Possibly, the single module frame has an apex height, a side wall height, a width and a length.

Possibly, the single module frame width is greater than its apex height, which is greater than its length.

Possibly, the single module frame apex height is no more than <NUM>, and desirably no more than <NUM>, possibly no less than <NUM> and desirably no less than <NUM>.

Possibly, the single module frame side wall height is no more than <NUM>, and desirably no more than <NUM>, possibly no less than <NUM> and desirably no less than <NUM>.

Possibly, the single module frame width is no more than <NUM>, and desirably no more than <NUM>, possibly no less than <NUM> and desirably no less than <NUM>.

Possibly, the single module frame length is no more than <NUM>, and desirably no more than <NUM>, possibly no less than <NUM> and desirably no less than <NUM>.

Possibly, the barrier member pieces include a barrier member side wall piece, a barrier member end wall apex piece, a barrier member end wall lower piece and a barrier member roof piece. Possibly, the barrier member end wall lower piece is substantially the same as the barrier member side wall piece.

Possibly, the barrier member comprises a barrier member end wall, which comprises one of the barrier member end wall apex pieces and two of the barrier member end wall lower pieces. Possibly, each of the barrier member end wall apex pieces is fastened to two of the barrier member end wall lower pieces by a fastening e.g. a hook and fleece fastening.

Possibly, the structure comprises one single module frame, two barrier member side wall pieces, two barrier member end wall apex pieces, four barrier member end wall lower pieces and a barrier member roof piece.

Possibly, in the assembled condition, the roof piece is fastened at each end to one of the side wall pieces by a fastening, e.g. a hook and fleece fastening.

Possibly, the support includes one or more additional module frames, each of which may include two single module frame side wall parts, one single module frame end wall part and a single module frame roof part.

Possibly, each additional module frame has an apex height, a side wall height, a width and a length which may be substantially similar to those of the single module frame.

Possibly, the structure comprises a single module frame, one or more additional module frames, two barrier member wall pieces, two end wall apex pieces, four end wall lower pieces and a roof piece, with additionally, for each additional module frame, two of the barrier member side wall pieces and one of the barrier member roof pieces.

Possibly, the support and the barrier member together define the interior.

Possibly, the support members comprise one or more fixing support members. Possibly, the or each fixing support member comprises at least one of the support fixings, which may be formed integrally therewith.

Possibly, the support members comprise one or more plain support members, the or each of which do not comprise one of the support fixings.

Possibly the structure provides protection for the plant part, and may comprise a plant protection structure.

There is described a method of controlling pollination of a plant, the method including providing a plant pollination control structure, the structure including a relatively rigid support and a relatively flexible barrier member, the barrier member being supported by the support, the barrier member defining an interior.

Possibly, the structure includes any of the features described in any of the preceding statements or following description. Possibly, the method includes any of the steps described in any of the preceding statements or following description.

Embodiments of the present invention will now be described, by way of example only, and with reference to the accompanying drawings, in which:-.

In the drawings, where multiple instances of the same or similar features exist, only a representative one or some of the instances of the features have been provided with numeric references for clarity.

In the drawings, where necessary, the general locations of features which are hidden (eg are behind or inside another feature) are indicated by numeric references with regular dashed leader lines.

<FIG> show a plant pollination control structure <NUM>, the structure <NUM> including a relatively rigid support or frame <NUM> and a relatively flexible barrier member or cover <NUM>. The barrier member <NUM> is supported by the support <NUM>. The barrier member <NUM> defines an interior <NUM>. The support <NUM> is located in the interior <NUM>.

In use, the support <NUM> is free standing, independent of the barrier member <NUM>. The barrier member <NUM> is not free standing.

The barrier member <NUM> could include a window area <NUM> which is formed of transparent material to enable viewing of the interior <NUM>.

The barrier member <NUM> comprises a material, which could be a textile material. The material could be translucent and could permit vapour transmission therethrough.

The material could be non-woven and could comprise a synthetic polymer, which could comprise one or more of polyester, polypropylene and/or polypropylene. The material could comprise a mesh.

The support <NUM> could be formed of a plastics material and could be formed by moulding.

The support <NUM> includes a plurality of elongate struts or support members <NUM>, which are held together by connection arrangements <NUM>. The connection arrangements <NUM> of this example are arranged to permit assembly, disassembly and re-assembly of the support <NUM> without the use of tools. In one example, the support members <NUM> and the connection arrangements <NUM> are held together by push fit action.

The connection arrangements <NUM> comprise female connectors <NUM>, which comprise a plurality of socket recesses <NUM> and, in this example, comprise female corner joint connectors 42A each of which defines three socket recesses <NUM>, which are angled at <NUM>° relative to each other.

Each support member <NUM> includes one or more projecting parts <NUM>, each of which comprises an end <NUM> of the support member <NUM> and which, in the assembled condition, is received in one of the socket recesses <NUM> of one of the corner joint connectors 42A.

The connection arrangements <NUM> comprise a male straight connector <NUM>, which connects two of the support members <NUM> together in line. The straight connector <NUM> comprises a body <NUM> and two projecting parts <NUM> which extend in opposite directions from the body <NUM>.

Each support member <NUM> defines one socket recess <NUM> at each end <NUM>, in which, in use, one of the straight connector projecting parts <NUM> is receivable in the assembled condition.

Each support member <NUM> is tubular and hollow, in the form of a pipe.

The support members <NUM> are circular in cross-section. The connection arrangements <NUM> are rounded.

The structure <NUM> has a length <NUM>, a width <NUM> and a height <NUM>.

In this example, the structure height <NUM> is greater than its width <NUM> and its length <NUM>. The width <NUM> and the length <NUM> are substantially the same.

The structure <NUM> has a plurality of horizontal cross-sectional interior areas at different distances up its height <NUM>. In this example, the horizontal cross-sectional areas are substantially the same at all of the distances up the height <NUM>.

The structure <NUM> comprises a roof <NUM>, two side walls <NUM> and two end walls <NUM>. The structure <NUM> does not comprise a floor.

The roof <NUM> is substantially planar, and in the installed condition is substantially horizontal. All of the side walls <NUM> and the end walls <NUM> are substantially the same size, are substantially planar and in the installed condition extend substantially vertically.

The support <NUM> comprises a base part <NUM>, side wall parts <NUM>, end wall parts <NUM> and a roof part <NUM>. Each of the base part <NUM>, the side and end wall parts <NUM>, <NUM> and the roof parts <NUM> is substantially planar. The base part <NUM> and the roof part <NUM> each comprise four corner joint connectors 42A with four equal lengths of support members <NUM> extending therebetween. The side and end wall parts <NUM>, <NUM> comprise four equal lengths of support members <NUM> extending between the corner joint connectors 42A of the base part <NUM> and the roof part <NUM>. In this example, all of the support members <NUM> are straight.

The barrier member <NUM> comprises a roof part <NUM> and side and end wall parts <NUM>, <NUM>, which locate against or alongside, respectively, the support roof part <NUM> and the support side and the end wall parts <NUM>, <NUM>.

The barrier member <NUM> includes securing features <NUM> to secure the structure <NUM> to the ground surface <NUM> in the installed condition. The securing features <NUM> could comprise skirt extensions <NUM>, which could extend outwardly from a lower edge of each of the barrier member side and end wall parts <NUM>, <NUM>, at the level of the support base part <NUM>. The skirt extensions <NUM> could be formed of the same material as the barrier member <NUM>, and could be formed integrally as part of the barrier member <NUM>.

In some examples the skirt extensions <NUM> and the barrier member <NUM> are formed of different materials from each other. For example, in one example the barrier member <NUM> may be formed of non-woven fabric material and the skirt extensions <NUM> may be formed of a tougher, more durable material than the barrier member <NUM>, for example a plastics material such as PVC.

One of the barrier member side or end wall parts <NUM>, <NUM> defines a window area <NUM>, which is formed of transparent material to enable viewing of the interior <NUM>.

The barrier member <NUM> is formed to a shape to fit over the support <NUM>. In one example, the barrier member <NUM> is pre-formed to the shape. In this example the pre-formed shape is in the form of a cuboid.

In a pre-assembly condition, the barrier member <NUM> could be formed of flat sheet material, which is formed into a bag, which has a single upper edge with two upper corners and two lower open edges which define an opening.

In the installed condition, the bag is folded and each of the two upper corners is fastened by a fastening <NUM> (eg, adhesive, a weld, a rivet or similar) to a different one of the barrier member side or end wall parts <NUM>, <NUM>.

The structure <NUM> defines a floor opening <NUM>, through which, in use in moving to the installed condition, the plant or plant part passes to locate in the interior <NUM> in the installed condition.

In other examples, the barrier member <NUM> could be formed to the shape to fit over the support <NUM> in situ.

In this example, the barrier member <NUM> is provided as a single piece and is formed from a single piece of material.

In one example, in the assembled condition, the structure height <NUM> is no more than <NUM>, and desirably no more than <NUM>, no less than <NUM> and desirably no less than <NUM>. In one example, the structure height is <NUM>.

In one example, in the assembled condition, the structure width <NUM> and the structure length <NUM> are no more than <NUM>, and desirably no more than <NUM>, possibly no less than <NUM> and desirably no less than <NUM>.

The barrier member <NUM> is not fixed to the support <NUM>, but is held in position by virtue of the shape and the fit to the support <NUM> and, in the installed condition, by the securing features <NUM>.

In use, in moving to the installed condition, the support <NUM> is firstly located over the plant and then the barrier member <NUM> is located on the support <NUM>, over the plant. The support <NUM> is located on the ground surface <NUM> and could be anchored thereto by, for example, pegs (not shown). The barrier member <NUM> contacts the ground surface <NUM> in a substantially continuous contact line <NUM> around the interior <NUM>. The barrier member <NUM> and the ground surface <NUM> together form a substantially continuous enclosure <NUM> around the interior <NUM>.

The plant could be rooted in a ground surface material. Thus, in the installed condition, a part of the plant could be located in the interior <NUM>, and another part of the plant could be located in the ground surface <NUM>.

For stability, weighting means which may take the form of a weight or weights could be located on the skirt extensions <NUM> to seal and secure or anchor the structure <NUM> to the ground surface <NUM>.

The skirt extensions <NUM> and weights are especially useful when the structure <NUM> is located or assembled on an uneven ground surface. In this case, there may exist significant gaps between the base of the structure <NUM> and the surface of the ground, and the skirt extensions <NUM>, in combination with the weights, guard against uncontrolled movement of pollen through these gaps.

The weight or weights hold down the skirt extensions <NUM> to provide an additional anchor for the structure and to prevent the skirt extensions from being blown up by gusts of wind, for example.

In some examples, the weight or weights may be water bags and/or sand bags. In some examples, the weight or weights may take the form of soil placed or piled on top of the skirt extensions <NUM>. In some examples, the weight or weights may be integral with or provided within the skirt extensions <NUM>, or may be provided within pockets of the skirt extensions.

<FIG> show other examples, many features of which are similar to those already described in relation to the example of <FIG>. Therefore, for the sake of brevity, the following exampleswill only be described in so far as they differ from the example already described. Where features are the same or similar, the same reference numerals have been used and the features will not be described again.

<FIG> show a second example of a plant pollination control structure <NUM>.

The structure <NUM> includes a pair of side walls <NUM>, a pair of end walls <NUM> and a roof <NUM>. The structure roof <NUM> includes an apex line <NUM>, which is aligned parallel to the structure length <NUM>.

The structure roof <NUM> is curved convexly from the top of the side walls <NUM> to the apex line <NUM>. The end walls <NUM> extend upwardly to the apex line <NUM>.

In the example shown, one of the end walls <NUM> defines the window area <NUM>.

In the example shown, one of the end walls <NUM> also defines an opening <NUM> in the form of a door opening <NUM> as will now be described. As shown in <FIG>, one of the end walls <NUM> comprises an opening wall <NUM> which is arranged to provide a person access opening <NUM> to permit access for a person to the interior <NUM>. The opening wall <NUM> includes a pair of parts 82A, 82B which are movable between a closed condition and an open condition to provide the person access opening <NUM>. The opening wall <NUM> includes a securing arrangement <NUM> to secure the opening wall parts 82A, 82B in the closed condition. In the example shown, the securing arrangement <NUM> comprises a releasable fastening <NUM> (eg complementary strips of hook and loop material), which extends substantially a greater portion of, or the whole, height of the respective barrier member end wall <NUM>, and could extend substantially the whole height of the structure <NUM>.

Referring to <FIG>, the roof support part <NUM> includes curved roof support members <NUM> and a plurality of lines of straight support members <NUM>.

In some examples, the curved roof support members <NUM> have a degree of flexibility that allows them to move with respect to the rest of the support. This is useful during strong winds, for example, as it reduces the pressure on the barrier member, which would otherwise be the only relatively flexible and movable member of the structure. The curvature of the roof, combined with its flexibility, is advantageous also because it helps to direct the wind up and over the structure, again taking pressure off of the barrier member material. Thus, the likelihood of the barrier member tearing or damaging in high winds, for example, is reduced. This is especially useful in examples in which the barrier member, or at least part of the barrier member, is formed of relatively fragile non-woven material.

In one example, flexibility of the curved roof support members <NUM> is achieved by providing the roof support members <NUM> as hollow plastic pipes. In some cases the hollow plastic pipes are made of medium-density polyethylene (MDPE).

The straight support members <NUM> comprise cross members <NUM> which extend across the interior <NUM>; apex support members <NUM> which substantially extend along the apex line <NUM>; and roof bracing members <NUM> which extend from the cross members <NUM> upwardly to the apex support members <NUM>.

The straight support members <NUM> are provided in a module length, which could be <NUM>, and which length determines the structure width <NUM>, length <NUM> and height <NUM>. The length <NUM> could comprise more than one module length.

The connection arrangement <NUM> could include female connectors <NUM>, which could comprise corner joint connectors 42A, straight connectors 42B and tee connectors 42C and curved connectors 42D. The support members <NUM>, <NUM> could locate within the socket recesses <NUM> of the connectors <NUM>. Each connector <NUM> could include a locking arrangement (not shown) such as a grub screw located through a threaded hole in the connector <NUM> and tightened against the respective support member <NUM>, <NUM> to lock the support member <NUM>, <NUM> in the assembled condition.

The structure <NUM> has an apex height <NUM>, a side wall height <NUM>, a width <NUM> and a length <NUM>. In this example, the structure length <NUM> is greater than the apex height <NUM>, which is greater than the width <NUM>, which is substantially the same as the side wall height <NUM>.

The horizontal cross-sectional areas are substantially the same at all of the distances up the height <NUM>, up to the top of the side walls <NUM> and then the horizontal cross-sectional areas decrease up to the apex line <NUM>.

In one example, the structure length <NUM> is no more than <NUM>, and desirably no more than <NUM>, no less than <NUM> and desirably no less than <NUM>. In one example, the structure length <NUM> could be <NUM>.

In one example, the apex height <NUM> is no more than <NUM>, and desirably no more than <NUM>, no less than <NUM> and desirably no less than <NUM>. In one example, the apex height <NUM> could be <NUM>.

In one example, the width <NUM> and the side wall height <NUM> could be no more than <NUM>, and desirably no more than <NUM>, no less than <NUM> and desirably no less than <NUM>. In one example, the width <NUM> and the side wall height <NUM> could be <NUM>.

Advantageously, the plant pollination control structure <NUM> permits a person to enter and work within the interior <NUM>.

<FIG> show a third example of a plant pollination control structure <NUM>, in accordance with an embodiment of the invention.

The structure <NUM> includes a barrier member fixing arrangement <NUM> to fix the barrier member <NUM> to the support <NUM>. The barrier member <NUM> comprises a plurality of barrier member pieces <NUM>, which are separate from each other, and each of which is fixed, separately, to the support <NUM>.

The barrier member fixing arrangement <NUM> includes a support fixing <NUM>, which, in the assembled condition, is fastened to the support <NUM> by fasteners (not shown) such as bolts or screws. Each support fixing <NUM> is elongate and comprises two elongate channelling formations <NUM>, each of which extends the full length of the respective support fixing <NUM>.

Each channelling formation <NUM> defines a channel <NUM> which extends along the full length of the channelling formation <NUM>. Each channel <NUM> comprises a bore <NUM> which extends along the length of the channel <NUM> and a slot opening <NUM> which also extends along the length of the channel <NUM> and extends laterally outwardly to permit access to the bore <NUM>. The slot opening <NUM> has a width and the bore <NUM> has a width, and the width of the slot opening <NUM> is less than the width of the bore <NUM>. The bore <NUM> is substantially circular in cross-section and the width of the bore <NUM> is the diameter of the bore <NUM>.

The two channelling formations <NUM> are arranged so that the slot openings <NUM> face away from each other in opposite directions.

Each of the barrier member pieces <NUM> includes a barrier member fixing <NUM>, which in the assembled condition engages with one of the support fixings <NUM> to fix the barrier member piece <NUM> to the support <NUM>. The barrier member fixings <NUM> comprise the barrier member fixing arrangement <NUM>. In moving from a disassembled condition to the assembled condition, each barrier member fixing <NUM> slidably engages with one of the support fixings <NUM>.

Each barrier member fixing <NUM> comprises an elongate bead formation <NUM>, which, in the assembled condition, slidably locates in the bore <NUM> (as indicated by arrows D in <FIG>). The bead formation <NUM> is substantially circular in cross-section, and forms an edge of the respective barrier member piece <NUM>. The bead formation <NUM> has a cross-section dimension (in this case, a diameter) which is greater than the width of the slot opening <NUM>, so that the bead formation <NUM> cannot easily pass through the slot opening <NUM> in a lateral direction.

Referring to <FIG>, the bead formation <NUM> comprises a core <NUM> and an attachment material <NUM> which extends from one surface of the barrier member piece <NUM>, around the core <NUM> to an opposite surface of the barrier member piece <NUM>. An edge part of the barrier member piece <NUM> is thus received between two layers of the attachment material <NUM> (as indicated by arrow C in <FIG>) and is affixed therebetween eg by stitching, bonding or any other suitable means so that the bead formation <NUM> forms an edge of the barrier member piece <NUM>.

One or more of the barrier member pieces <NUM> includes a pair of parallel spaced apart barrier member fixings <NUM> which extend along two parallel edges of the respective barrier member piece <NUM>, which edges face oppositely away from each other.

The support <NUM> includes one or more pairs of parallel, spaced apart, support fixings <NUM>. In moving to the assembled condition, the two barrier member fixings <NUM> engage the two support fixings <NUM> substantially simultaneously and slide therealong simultaneously.

As shown in <FIG>, the support <NUM> comprises a single module frame <NUM>, which comprises two single module frame side wall parts <NUM>, two single module frame end wall parts <NUM> and a single module frame roof part <NUM>. Each of the parts <NUM>, <NUM><NUM> comprises support members <NUM>. The support members <NUM> could be assembled together to form the parts <NUM>, <NUM>, <NUM> in a way which permits disassembly, for example by screwing, bolting or using brackets or permanently eg by welding.

In one example, the support members <NUM> are formed of hollow section steel.

The parts <NUM>, <NUM>, <NUM> are desirably assembled together to form the single module frame <NUM> in a way which permits disassembly, for example by screwing, bolting or using brackets.

The support fixings <NUM> are fastened to some faces of the some of the support members <NUM> as shown by arrows F in <FIG>, for example, by bolting or screwing.

The single module frame <NUM> has an apex height <NUM>, a side wall height <NUM>, a width <NUM> and a length <NUM>.

The single module frame width <NUM> is greater than its apex height <NUM>, which is greater than its length <NUM>.

In one example, the single module frame apex height <NUM> could be no more than <NUM>, desirably no more than <NUM>, no less than <NUM> and desirably no less than <NUM>. In one example, the single module frame apex height <NUM> could be <NUM>.

In one example, the single module frame side wall height <NUM> could be no more than <NUM>, desirably no more than <NUM>, no less than <NUM> and desirably no less than <NUM>. In one example, the single module frame side wall height <NUM> could be <NUM>.

In one example, the single module frame width <NUM> could be no more than <NUM>, desirably no more than <NUM>, no less than <NUM> and desirably no less than <NUM>. In one example, the single module frame width <NUM> could be <NUM>.

In one example, the single module frame length <NUM> could be no more than <NUM>, desirably no more than <NUM>, no less than <NUM> and desirably no less than <NUM>. In one example, the single module frame length <NUM> could <NUM>.

Referring to <FIG> and <FIG>, the barrier member pieces <NUM> include a barrier member side wall piece <NUM>, a barrier member end wall apex piece <NUM>, a barrier member end wall lower piece <NUM> and a barrier member roof piece <NUM>. The barrier member end wall lower piece <NUM> is substantially the same as the barrier member side wall piece <NUM>.

The barrier member <NUM> comprises a barrier member end wall <NUM>, which comprises one of the barrier member end wall apex pieces <NUM> and two of the barrier member end wall lower pieces <NUM>. Each of the barrier member end wall apex pieces <NUM> is fastened to two of the barrier member end wall lower pieces <NUM> by a fastening <NUM> eg a hook and fleece fastening.

In the example shown in <FIG>, the structure <NUM> comprises one single module frame <NUM>, two barrier member side wall pieces <NUM>, two barrier member end wall apex pieces <NUM>, four barrier member end wall lower pieces <NUM> and a barrier member roof piece <NUM>.

The structure <NUM> is assembled as follows. The single module frame <NUM> is firstly constructed in situ. The barrier member pieces <NUM> are then separately attached to the single module frame <NUM>. It will be noticed that, except on the apex end wall, the support fixings <NUM> are arranged in pairs and the barrier member fixings <NUM> are arranged in corresponding pairs. Thus, each of the barrier member roof piece <NUM>, the barrier member end wall lower pieces <NUM> and the barrier member side wall pieces <NUM> includes a pair of the barrier member fixings <NUM> located on two parallel edges, which edges face oppositely away from each other.

Taking as an example the barrier member roof piece <NUM>, the two ends of the barrier member fixings <NUM> of the barrier member roof piece <NUM> are located in the corresponding support fixings <NUM> located on the curved roof members <NUM> and are slid therealong as indicated by arrow A in <FIG>, until the barrier member fixings <NUM> of the barrier member roof piece <NUM> extend substantially wholly along the support fixings <NUM> of the curved roof members <NUM> and the barrier member roof piece <NUM> covers the curved roof members <NUM>. The barrier member end wall lower pieces <NUM> and the barrier member side wall pieces <NUM> are assembled to the single module frame <NUM> in a similar way, as shown schematically in cross-section plan in <FIG>.

The barrier member end wall apex piece <NUM> includes a barrier member fixing <NUM> along its curved edge which is located in the support fixing <NUM> of the one of the curved roof members <NUM>. With the barrier member end wall apex piece <NUM> and the barrier member end wall lower pieces <NUM> assembled to the single module frame <NUM>, the barrier member end wall apex piece <NUM> and the barrier member end wall lower pieces <NUM> are then fastened together by the fastening <NUM>.

In the assembled condition, the roof piece <NUM> is fastened at each end to one of the side wall pieces <NUM> by another fastening <NUM> eg a hook and fleece fastening.

A particular advantage of the third plant pollination control structure <NUM> is that the barrier member <NUM> is fixed to the support <NUM> (rather than being a loose cover as in the examples of <FIG>). This prevents or reduces abrasion of the barrier member <NUM> as the structure <NUM> moves (for example in wind). This means that a thinner, more fragile material (such as non-woven material formed of synthetic polymers such as polyester or polypropylene) can be used for the barrier member <NUM> than would otherwise be the case. This allows the material of the barrier member <NUM> to be chosen based, to a greater extent, on its pollination control properties rather than its strength. Also, if part of the barrier member <NUM> is damaged, only the piece(s) <NUM> which are damaged need be replaced.

The support <NUM> could include one or more additional module frames <NUM>. Each additional module frame <NUM> has an apex height, a side wall height, a width and a length which are substantially similar to those of the single module frame <NUM>.

The additional module frames <NUM> could include an additional end module frame <NUM>, one example of which is shown in <FIG>. Each additional end module frame <NUM> includes two single module frame side wall parts <NUM>, one single module frame end wall part <NUM> and a single module frame roof part <NUM>.

The support fixings <NUM> are fastened to some faces of the some of the support members <NUM> of the additional end module frame <NUM> as shown by arrows F in <FIG>.

<FIG> also shows an example of how the module frames <NUM>, <NUM>, <NUM> could be constructed. Each of the frames <NUM>, <NUM>, <NUM> comprises horizontal support members <NUM> and vertical support members 34V. The horizontal support members <NUM> include tabs <NUM>, one of which extends downwardly from each end. Each of the vertical support members 34V includes loop members <NUM> which define tab receiving recesses <NUM>. In the assembled condition, the tabs <NUM> locate in the tab receiving recesses <NUM>.

In use, additional end module frames <NUM> can be added end to end to the single module frame <NUM> as required to extend its length. The structure <NUM> could then comprise one single module frame <NUM>, and one or more additional end module frames <NUM>, two barrier member side wall pieces <NUM>, two end wall apex pieces <NUM>, four end wall lower pieces <NUM> and a roof piece <NUM>, with additionally, for each additional end module frame <NUM>, two of the barrier member side wall pieces <NUM> and one of the barrier member roof pieces <NUM>.

The support <NUM> could include a plurality of the single module frames <NUM> which are located side by side to extend the width of the structure <NUM>.

Alternatively, the support <NUM> could include a single module frame <NUM>, a plurality of additional end module frames <NUM> to extend the length of the structure <NUM>, a plurality of additional side module frames <NUM> which add support members <NUM> to the single module frame to extend the width of the structure <NUM> and a plurality of additional side-end module frames <NUM> which extend both the width and the length of the structure <NUM>.

Thus the additional module frames <NUM> could include additional end module frames <NUM>; additional side module frames <NUM>; and/or additional side-end module frames <NUM>.

In another example, the support <NUM> could comprise a plurality of single module frames <NUM> which could be located alongside each other both lengthwise and width-wise as required. The barrier member <NUM> of one single module frame <NUM> could be arranged to be fixed to the support fixing <NUM> of the adjacent single module frame <NUM> to provide a complete enclosure <NUM> with no gaps.

<FIG> shows a structure <NUM> comprising (the locations of the frames being indicated generally by dashed leader lines in <FIG>): one single module frame <NUM>; three additional end module frames <NUM>; one additional side module frame <NUM>; and three additional side-end module frames <NUM>.

The structure <NUM> then includes barrier member pieces <NUM> which are assembled to the module frames <NUM>, <NUM>, <NUM>, <NUM> to provide a continuous barrier member <NUM> which, with the ground surface <NUM>, provides an enclosure <NUM> around the interior <NUM>.

The applicant has found that various sizes of structures <NUM> can be thus be formed from combinations of the single module frame <NUM>, the additional module frames <NUM> and the barrier member pieces <NUM>.

<FIG> show a fourth example of a plant pollination control structure <NUM>, in accordance with an embodiment of the invention.

In this embodiment, the support members <NUM> comprise fixing support members 34B. Each fixing support member 34B comprises at least one of the support fixings <NUM> of the third embodiment and is formed integrally therewith.

In the example shown, the fixing support members 34B are of similar size circular cross-section to the support members <NUM> of the first embodiment <NUM> shown in <FIG> and can utilise the same or similar corner joint connectors 42A.

Each fixing support member 34B comprises two elongate channelling formations <NUM>, each of which extends the full length of the respective fixing support member 34B.

As in the third embodiment shown in <FIG>, each channelling formation <NUM> defines a channel <NUM> which extends along the full length of the channelling formation <NUM>. Each channel <NUM> comprises a bore <NUM> which extends along the length of the channel <NUM> and a slot opening <NUM> which also extends along the length of the channel <NUM> and extends laterally outwardly to permit access to the bore <NUM>. The slot opening <NUM> has a width and the bore <NUM> has a width, and the width of the slot opening <NUM> is less than the width of the bore <NUM>. The bore <NUM> is substantially circular in cross-section and the width of the bore <NUM> is the diameter of the bore <NUM>.

The two channelling formations <NUM> of each fixing support member 34B are arranged so that the slot openings <NUM> face away from each other in opposite directions.

<FIG> shows a support <NUM> of the fourth plant pollination control structure <NUM> comprising support members <NUM>, which comprise plain support members 34A of plain circular cross-section (which do not comprise one of the support fixings <NUM>) and fixing support members 34B.

The fixing support members 34B are arranged in pairs, comprising two pairs of vertically extending fixing support members 34BV and a pair of horizontally extending fixing support members 34BH.

<FIG> shows barrier member pieces <NUM> being fitted to the support <NUM>. In the example shown, the barrier member pieces <NUM> comprise a roof and side walls piece <NUM> and two end wall pieces 134A. Each of the barrier member pieces <NUM> includes a pair of spaced apart barrier member fixings <NUM> which extend along two parallel edges of the respective barrier member piece <NUM>, which edges face oppositely away from each other.

In moving to the assembled condition, the barrier member fixings <NUM> of the roof and side walls piece <NUM> are slid up and along the corresponding channels <NUM> of one pair of the vertically extending fixing support members 34BV, across and along the channels <NUM> of the horizontally extending fixing support members 34BH and down and along the channels <NUM> of the other pair of the vertically extending fixing support members 34BV as indicated by arrows J. Thus, in this embodiment, the roof and side walls piece <NUM> provides two side walls and a roof as a single continuous piece.

Similarly, the barrier member fixings <NUM> of each end wall piece 134A are slid up and along corresponding channels <NUM> of the vertically extending fixing support members 34BV as indicated by arrows K to form end walls of the structure <NUM>. The top edges of the end wall pieces 134A could be fastened to the roof and side walls piece <NUM> by a fastening <NUM> eg a hook and fleece fastening.

Advantageously, this embodiment combines the advantages of the first and second embodiments, namely, simple, economic, lightweight construction, easy build, quick assembly and disassembly, with the advantages of the third embodiment, namely fixing of the barrier member to the support to reduce barrier member damage. The arrangement of this embodiment has been found to be particularly suitable for smaller structures such as those having a floor area of less than <NUM> by <NUM> and more desirably of <NUM> by <NUM>.

<FIG> show fifth and sixth examples of plant pollination control structures <NUM>, <NUM> in accordance with embodiments of the invention. In each case, the support <NUM> is similar to that of the fourth embodiment, but the support members 34B include, respectively, angled roof members <NUM> and curved roof members <NUM>.

<FIG> show a seventh example of a plant pollination control structure <NUM>, in accordance with an embodiment of the invention.

In this embodiment, the support <NUM> comprises fixing support members 34B similar to those described above for the fourth embodiment <NUM>, in which each fixing support member 34B comprises two elongate channelling formations <NUM> each defining a channel <NUM>. The barrier member <NUM> comprises a plurality of panels or pieces <NUM>, each of which includes a bead formation <NUM>, which, in the assembled condition, locates in one of the channels <NUM>.

However, in this embodiment, referring to <FIG>, the attachment material <NUM> of the bead formations <NUM> of the barrier member fixings <NUM> comprises a releasable fastening <NUM> comprising a first area of hook or loop material 88A, which is located on one side of the attachment material <NUM>.

Each of the barrier member pieces <NUM> includes a complementary second area of hook or loop material 88B in the form of a strip extending along one or more edge regions <NUM> on one side of the barrier member pieces <NUM>. In this way, the barrier member fixings <NUM> act as intermediate fixings that can be releasably or removably attached or fixed to both the barrier member and the support. Specifically, the barrier member fixings <NUM> releasably attach to barrier member pieces <NUM> via the releasable fastenings <NUM>, and releasably attach to the support <NUM> via the bead formation <NUM> which slidably locates in a channel <NUM> of a fixing support member 34B.

In one example, the fixing support members 34B are formed of metal, eg aluminium, by extrusion. The support <NUM> includes female connectors <NUM> which are formed of metal, for example, aluminium, by casting.

In assembling the seventh control structure <NUM>, the bead formations <NUM> are firstly located in the bores <NUM> of the channels <NUM> of the fixing support members 34B. The fixing support members 34B are then located into the socket recesses <NUM> of the connectors <NUM> to form the support <NUM> as shown in <FIG>. When assembled in this way, the attachment material <NUM> of the barrier member fixings <NUM> extends into the openings defined between the fixing support members 34B. In the example shown, the support <NUM> also includes a pair of roof support members <NUM>.

The barrier member pieces <NUM> are then assembled to the support <NUM> by simply fastening the second areas of hook or loop material 88B of the barrier member pieces <NUM> to the first areas of hook or loop material 88A to form the assembled structure <NUM> as shown in <FIG>. The releasable fastenings <NUM> defined by the first and second areas of hook or loop material 88A, 88B are positioned adjacent the fixing support members 34B, within the openings defined between the fixing support members 34B that the barrier member pieces <NUM> cover in use. In this way, the barrier member pieces <NUM> are suspended within these openings, and do not overlie, overlap or otherwise contact the support <NUM>. This is advantageous, because it prevents abrasion of the barrier member pieces <NUM> due to general contact with the support <NUM> in use, and in particular due to contact caused by the barrier member pieces <NUM> being blown against the support <NUM> during windy weather conditions. Avoiding this contact between the barrier member pieces <NUM> and the support <NUM> enables the barrier member pieces <NUM> to be formed from a more fragile material, such as a non-woven material, which may have better pollination control properties in certain scenarios. In that case, the attachment material <NUM> may be formed of a stronger, more durable material that is better able to withstand abrasion caused by contact with the support <NUM>.

In the assembled condition as shown in <FIG>, the edge regions <NUM> of the barrier member pieces <NUM> with the second areas of hook or loop material 88B are located on the inside of the barrier member pieces <NUM>. In <FIG>, the locations of the edge regions <NUM> are shown delineated on the outside surface of the barrier member pieces <NUM> and indicated by reference numerals <NUM>, but in reality the delineation might only comprise lines of stitching and the edge regions <NUM> per se would not be visible from the outside. As shown, the edge regions <NUM> of the barrier member pieces <NUM> are offset from the fixing support members 34B of the support <NUM>, so as to be positioned within the openings defined between the fixing support members 34B.

As shown in <FIG>, the barrier member pieces <NUM> include two side wall pieces <NUM>, two end wall pieces 134A and a roof piece <NUM>.

Some of the barrier member pieces <NUM> have additional first areas of hook or loop material 88A (not shown) which in the assembled condition are located on the outside of the respective barrier member piece <NUM> and allow fastening of the second area of hook or loop material 88B of an adjacent barrier member piece <NUM> thereto eg, the roof piece <NUM> to the end wall piece 134A.

The side wall pieces <NUM> include flaps <NUM> extending from the upper corners thereof which fold around the support <NUM> and are fastened to the neighbouring roof piece <NUM>, again, by complementary areas of hook and loop material, to cover over gaps between the barrier member pieces <NUM> at the upper corners of the support <NUM>.

Advantageously, the structure <NUM> is strong but easily assembled and disassembled. Access to the interior <NUM> can be easily obtained by simply unfastening parts of the areas of the hook or loop materials <NUM>. Barrier member pieces <NUM> can advantageously be detached from / attached to the structure <NUM> without disassembling the support <NUM> or adjusting or altering the engagement between the support <NUM> and the barrier member fixings <NUM>. In this way, the support <NUM> can remain assembled whilst barrier member pieces <NUM> are detached and repaired and/or replaced.

Individual barrier member pieces <NUM> can be easily and quickly detached / attached independently of other barrier member pieces <NUM>, this being especially useful when different parts of the barrier member are formed of different materials which may require replacement at different intervals, and/or when the barrier member is formed of a more fragile material which may require more frequent repair or replacement.

This structure <NUM> has been found particularly suitable for floor areas of <NUM> square metres (<NUM> by <NUM>) up to <NUM> square metres (<NUM> by <NUM>).

The support <NUM> of the structure <NUM> shown in <FIG> could comprise a single module frame <NUM> which can be used to construct a larger structure in a similar way to that described for the embodiment shown in <FIG>.

Although not shown in <FIG>, the structure <NUM> could include skirt extensions <NUM> extending from lower edges of the barrier member side and end wall pieces <NUM>, 134A to seal and secure the structure <NUM> to the ground.

The skirt extensions <NUM> could be formed from nonwoven/mesh material (per the rest of the structure) or a plastic film (eg reinforced vinyl) which is easier to clean.

Various other modifications could be made without departing from the scope of the invention. The structure, the support and the barrier member could be of any suitable size and shape, and could be formed of any suitable material (within the scope of the specific definitions herein).

The various components including the support members and the barrier member pieces could be of any suitable size and formed of any suitable material (within the scope of the specific definitions herein).

In some embodiments, at least some of the support members may be elongate and have a generally square cross-section, having two generally square end faces <NUM>, two generally rectangular side faces <NUM>, and generally rectangular top and bottom faces <NUM> and <NUM>, respectively, as illustrated in the support member <NUM> of <FIG>. At least one side face may include a channel <NUM> for receiving a barrier member fixing, and in some cases each side face may include a channel <NUM> for receiving a barrier member fixing.

The fastenings and the connections between the support members could be of any suitable design (within the scope of the specific definitions herein).

<FIG> shows a connection arrangement or bracket <NUM> for connecting together support members <NUM>. The bracket <NUM> is a substantially flat metal plate having a first face <NUM>, a second face (not shown), and a peripheral edge <NUM> that connects the first face <NUM> and the second face. The bracket <NUM> is generally triangular in shape, having three major edges <NUM> that at least partially define the edges of a right-angled triangle. A plurality of openings <NUM>, or through-holes, extend fully through a thickness of the bracket <NUM> defined between the first face <NUM> and the second face, i.e. the openings <NUM> penetrate the bracket. The openings <NUM> are configured to receive bolts <NUM> to allow support members <NUM> to be attached to the bracket <NUM>, as will be explained. It will be understood that the number and distribution of openings <NUM> may vary in other embodiments, depending on the form of the complementary connection region of the support member <NUM>.

The bracket <NUM> allows for multiple support members <NUM> to be assembled in various different configurations, and can be used to connect smaller modules of a larger pollination control structure. <FIG> illustrate two ways in which one or more brackets <NUM> may be used to connect support members <NUM>.

Referring first to <FIG>, a support member <NUM> is attached to a first bracket 836a by means of bolts <NUM> that extend through openings <NUM> defining first attachment portions <NUM> of the first bracket 836a, and engage with a complementary nut (not shown) housed within the channel <NUM> of a side face <NUM> of the support member <NUM>. The top face <NUM> of the support member <NUM> is attached at first attachment portions <NUM> of a second bracket 836b in a similar manner.

Although not shown in <FIG>, further support members <NUM> may be attached to the first and second brackets 836a, 836b at second attachment portions <NUM> in a similar manner to that already described above. In that case, the first and second brackets 836a, 836b enable three support members <NUM> to be assembled such that each support member <NUM> is arranged at <NUM> degrees to each of the other support members <NUM>. Such an arrangement may be used to form a top corner of a pollination control structure, for example.

Turning now to <FIG>, in this arrangement a first support member <NUM> is attached at first attachment portions <NUM> of a bracket <NUM>. Although not shown, second and third support members may be attached to the bracket <NUM> at second and third attachment portions <NUM> and <NUM>, respectively. In that case, the first support member <NUM> is arranged at <NUM> degrees with respect to each of the second and third support members, and the second and third support members extend in the same direction as one another, such that the three support members define a T-shape.

Advantageously, the bracket <NUM> is a flat plate that is easy to manufacture, transport and store. A further benefit of the bracket <NUM>, illustrated in <FIG>, is that it does not interfere with or block use of the channels <NUM> at edge regions <NUM> of the support members <NUM> that it connects. In this way, barrier member fixings <NUM> can extend in the channels <NUM> to edge regions <NUM> of the support members <NUM>, such that gaps between barrier member pieces <NUM> at corners of the structure can be avoided without the need for e.g. flaps <NUM> such as those shown in <FIG>.

Any of the embodiments described could include skirt extensions.

The barrier members could include window openings and windows, door openings and doors. The windows, doors, openings and skirt extensions could be different to those shown, in number, size, location and type.

The cross sectional shapes of the bead formation and the bore could be other than circular, for example a flattened circle, an oval or a part circular shape with a flat side.

The structure could provide protection for the plant part, and could comprise a plant protection structure.

Any of the features or steps of any of the embodiments shown or described could be combined in any suitable way, within the scope of the overall disclosure of this document.

There is thus provided plant pollination control structures with a number of advantages over conventional arrangements. The structures provide support to the barrier members reducing plant damage particularly for large plants or large areas of planting. The structures reduce the likelihood of damage from barrier member movement caused inadvertently by a person, an animal or by weather conditions or during fitting and removal of the barrier member.

Claim 1:
A pollination control structure comprising:
a support (<NUM>);
a plurality of support fixings (34B), each support fixing (34B) being attached to
or integral with the support (<NUM>), and;
a barrier member (<NUM>) comprising a plurality of barrier member pieces (<NUM>);
wherein at least one of the barrier member pieces (<NUM>) is releasably attached to at least one of the support fixings (34B) by an intermediate fixing (<NUM>) that offsets the barrier member piece (<NUM>) from the support fixing (34B), wherein the intermediate fixing (<NUM>) is releasably attached to the support fixing (34B); characterised in that
the barrier member piece (<NUM>) is releasably attached to the intermediate fixing (<NUM>), and
in that the barrier member pieces (<NUM>) are suspended entirely within openings defined between the support fixings (34B) and are arranged such that they do not overlap the support (<NUM>).