GB2612868A

GB2612868A - A concealable panel-engagement apparatus

Info

Publication number: GB2612868A
Application number: GB2207025.4A
Authority: GB
Inventors: John Knight Stephen; Lu Han
Original assignee: Stonehouse Cotton Co S L
Current assignee: Stonehouse Cotton Co S L
Priority date: 2022-03-04
Filing date: 2022-05-13
Publication date: 2023-05-17
Anticipated expiration: 2042-05-13
Also published as: GB202207025D0; GB2612868B; GB202203050D0; GB2612868C

Abstract

A concealable panel engagement apparatus (10, Figure 5a) for attaching a panel 16 to opposing perimeter support surfaces 40a. The concealable panel-engagement apparatus 10 comprising at least one elongate support rack 12 which is receivable in a said panel. The elongate support rack has a plurality of rack openings 22, which may be rack teeth, and an end peg 18 extendable from the panel. A rack driver 14 is also provided which is engageable with one or more of the rack openings to move the end peg 18 into a said perimeter support surface adjacent to the panel. The rack driver may include a rotatable carrier body 14a and a pinion on said body. An apparatus in the form of a kit of parts (108, Figure 27) and a method of attaching a panel to opposing perimeter support surface using the above apparatus are also disclosed. A panel engagement jig (54, Figure 9a) comprising a first jig body (56, Figure 9a) having a movable first drill-bit guide (60, Figure 9a) thereon, and a second jig body (57, Figure 9a) having a movable second drill bit guide (62, Figure 9a) thereon is also disclosed.

Description

A Concealable Panel-Engagement Apparatus The present invention relates to a concealable panel-engagement apparatus, particularly but not necessarily exclusively for attaching a panel to an opposing perimeter support surfaces in shelving units. Furthermore, the present invention relates to an assembly, again particularly but not necessarily exclusively to shelving units, and to a method of assembling such shelves so as to accommodate the said concealable panel-engagement apparatus.

Conventional support devices used for adjusting the height of shelves inside furniture such as, but not limited to, kitchen cabinets, wardrobes, and the like, are of many different designs. One such design includes the use of pins 1, batons and/or dowels inserted into pre-drilled holes 2 in cabinet side panels 3 for the shelves 4 to rest loosely upon, as shown in Figure 1 of the drawings. Alternatively, metal brackets 5 may be fastened to vertical support members 6, as shown in Figures 2 and 3, upon which horizontal shelf panels 4 may rest or be fixed. Likewise, wood batons 7 may also be used in preference to metal brackets in some instances, as shown in Figure 4. Use of metal brackets 5 or wood batons 6 being better suited where the vertical support members 6 are or include brick, concrete or plaster walls such as pantries. One key disadvantage is that all these support fixtures protrude from the vertical and or horizontal shelving panels 6, 7, presenting a snagging hazard and affecting the aesthetics.

The objective of the invention is to interlock the two main components inside the shelf or other panel material, so it stays inside the shelf and thereby being completely concealed. This improves the aesthetics of the furniture while ensuring the shelf height remains adjustable yet unable to be moved in any direction when in position, reducing the risk of falling shelves and stored items that can cause injury.

According to the first aspect of the invention, there is provided concealable panel-engagement apparatus for attaching a panel to opposing perimeter support surfaces, the concealable panel-engagement apparatus comprising: at least one elongate support rack which is receivable in a said panel and which has a plurality of rack openings and an end peg extendable from the panel; and a rack driver which is engageable with one or more of the rack openings to move the end peg into a said perimeter support surface adjacent to the panel.

Such concealable panel-engagement apparatus enables panels to be attached and unattached, easily by a single user, to opposing perimeter support surfaces repeatedly and securely without components suffering greatly from fatigue related failures. By utilising such a rack and rack driver provides a quick and convenient way of repositioning said panel to a desired position, whilst also being fully concealed from view once the end pegs of the rack are engaged.

Beneficially, the rack driver may include a rotatable carrier body which is receivable in said panel, and a pinion on the carrier body; and the plurality of rack openings are rack teeth which are engageable with the pinion. Inclusion of such a pinion affords rotational motion to be converted into linear motion of the rack, extending and retracting the end peg from the panel, where rotational motion provides a more space-efficient rack driving mechanism.

Preferably, the carrier body may include a flange, or first flange, which is axially at or adjacent to the pinion. In this case, a second flange may also be included, said second flange being axially spaced apart from the first flange, so that the pinion is therebetween. In this case, the pinion is effectively sandwiched between the flanges, helping to guide the rack and maintain engagement between the pinion and the rack openings. More specifically, the relationship between two such flanges ensures that neither the elongate support rack nor the carrier body are able to come loose once assembled inside the panel. This can be further assisted if the flanges extend to a greater extent compared to that of the pinion.

Furthermore, the carrier body may include a radially-inner surface to complementarily or substantially complementarily receive at least a portion of a body of the support rack. The radially-inner surface may be at least in part arcuate. By preferably making a lateral cross-section of the support rack arcuate or substantially arcuate, improved engagement with the carrier body and associated pinion can be realised.

Additionally, the carrier body preferably includes a tool receiver. The tool receiver may be a recess that extends radially from a rotational axis of the carrier body. Additionally or alternatively, a said tool receiver may be on each axially facing surface of the carrier body. Furthermore, the or each tool receiver may be dimensioned to engage at least one of a screwdriver and a hexagonal key. The tool receiver may also be or include an engageable protrusion, for example, to receive a socket bit for a wrench.

Beneficially, the apparatus may further comprise a rack lock element which is engageable with the elongate support rack to replace the carrier body, the rack lock element including a circumferential wall portion, one or more rack-lock teeth being on a first part of the wall portion and a second part of the wall portion being devoid of said rack-lock teeth. Use of such a rack lock, prevents unintended linear movement of the elongate support rack and possible unintentional disengagement of the end peg from the perimeter support surface. The rack lock element may preferably include an access cover element for occluding access to the elongate support rack. The rack lock element is preferably a push-fit, and assists with concealing the carrier body, pinion and support rack within the thickness of the panel, when located therein.

Optionally, a carrier housing in which the carrier body is rotatably received, the carrier housing having a rack-access opening for engagement with the support rack, and tool-receiver opening for receiving a tool by which the carrier body is rotatable. This affords a smoother rotational motion of the carrier body within the housing which can then be secured in place by a fighter compressional fit than that if the housing was not included.

In some instances, the compressional fit between the said housing and panel can be aided or achieved by at least one anti-rotation element on the carrier housing.

Advantageously, the carrier housing may include a carrier-biasing element for biasing an end portion of the carrier body against the support rack to prevent or inhibit unintentional longitudinal movement of the support rack, providing a default locking mechanism.

Preferentially, an access cover which is engageable with the carrier body may be included. In this case the access cover is preferably a push-fit element, which may be sacrificial and/or disposable. Wien viewing a carrier-body opening, the access cover closes the carrier-body opening to conceal the carrier body, pinion and retracted support rack within the thickness of the panel.

The access cover may also include a carrier-facing surface and an exterior-facing surface, the carrier-facing surface may include a carrier-engagement element for engaging the rotatable carrier body. The carrier-engagement element may be complimentary and engage with the tool-receiving opening. In this case, the access cover may also act to help prevent unwanted rotation of the carrier body by also including an anti-rotation element. In some instances, the anti-rotation element may simply be achieved by engagement with a side edge of the access cover. This may be further aided by interaction between the anti-rotation element of the access cover with an anti-rotation element on a side edge of the access cover.

Preferably, the elongate support rack includes a body portion which is devoid of rack teeth and which is at or adjacent to the end peg. This reduces the risk of the elongate support rack becoming lodged within the panel by limiting the amount it can be retracted. The said body portion may advantageously be a simple smooth, continuous and/or uninterrupted surface, which may be for example, cylindrical or multi-faceted. Additionally, the profile of the rack teeth may extend around the full cross-sectional perimeter of the elongate support rack body. This allows the end peg to be engaged and disengaged in the event of unintentional rotation of the elongate support rack within the panel or negate the need to align the rack teeth towards the rack-driver opening.

The concealable panel-engagement apparatus may further comprise a plurality of selectable said elongate support racks, each having a different said end peg for different applications. This enables the end pegs to be more reliably or securely engageable in openings, receivers or sockets of the perimeter support surface or surfaces. Furthermore, the elongate support rack and end peg may be modular parts. Modularity affords the user a greater selection of end pegs whilst reducing component inventory and wasted material. Another possible disengageable end peg option may include a movable engagement portion for increasing engagement when inserted into said perimeter support surface. In this case, the end peg may include a deformable portion that increases dimensionally in a radial direction with axial compression. This affords a tight compressive fit between the end peg and opposing support surface.

Beneficially, the elongate support rack may include one or more longitudinal channels which extend along at least a majority of a longitudinal extent thereof, the or each longitudinal channel preventing or inhibiting unintentional axial rotation of the elongate support rack. Additionally, such channels or grooves can reduce the volume of material of the support rack, with benefits to the environment and cost to manufacture.

Advantageously, one said carrier-body opening may communicate with two said support-rack openings, each said support-rack opening extending in different directions. In this case, two said elongate support racks may be inserted into respective support-rack openings and engage with a pinion of a common said carrier body.

Optionally, the rack driver includes the carrier body in combination with a hand-grip forming a hand-holdable driving tool. The said carrier body in this instance may considered to be, or form part of, a carrier-engagement bit. The hand-grip may be typically ergonomic, and may include a tool shaft which extends between the hand-grip and the carrier-engagement bit. Beneficially, the carrier-engagement bit may be or include a carrier body, a tool complimentary to the tool receiver, or a tool directly suitable to be directly engageable with the elongate support rack. Additionally, the carrier-engagement bit may be releasably engageable with the grip. In this instance, the carrier-engagement bit may present both carrier body and a more conventional tool at opposing ends. Likewise, two different conventional tool ends may be at opposing ends to suit different tool receivers or tools to engaged with the rack openings.

Preferably, the rack driver includes a rack-biasing element which biases the elongate support rack into a support-surface engagement condition. This affords the user a default locking mechanism, minimising the risk of the panel disengaging with the support surfaces.

Optionally, there is provided concealable panel-engagement apparatus for attaching a panel to opposing perimeter support surfaces, the concealable panel-engagement apparatus comprising a rotatable carrier body which is receivable in a said object support panel, a pinion on the carrier body, and at least one elongate support rack having a plurality of rack teeth engageable with the pinion and an end peg extendable from the object support panel and into a said perimeter support surface. The panel is preferably an object support panel, such as a shelf, but may be any suitable panel, such as a divider or partition for, by way of example only, a shelving unit or other housing, and/or carcass panels, housing panels and/or enclosure panels, for example, of a shelving unit, cupboard, container or compartment, wardrobe, dresser, and drawers.

Alternatively, there may be provided a concealable panel-engagement apparatus for attaching a panel to opposing perimeter support surfaces, the concealable panel-engagement apparatus comprising: at least one elongate support rack which is receivable in a said panel and which has a plurality of rack openings and an end peg extendable from the panel; and a hand-holdable rack driving tool which is engageable with one or more of the rack openings, the rack driving tool being movable linearly to move the end peg into a said perimeter support surface adjacent to the panel. Linear motion of the hand-holdable rack driving tool allows the end peg to be engaged and disengaged, and thus engagement and disengagement of the panel within the opposing perimeter support. Although said elongate support rack is preferably receivable within a panel for shelving units, cupboards, containers or compartments, wardrobes, dressers, and drawers, it is also possible to be receivable within legs of tables and chairs, and boards/beams in bed frames.

Advantageously, the or each said rack opening may include at least one tool-engagement rib which extends circumferentially around a rack body of the elongate support rack. In the event of unintentional rotation of the elongate support rack within the panel, engagement and disengagement of the end peg can still be achieved. Again, in this case, the apparatus may further comprise an access cover. The access cover may include a rack-facing surface and an exterior-facing surface. The rack-facing surface having at least one rack-engagement element for engaging one or more of the said rack openings to prevent or inhibit longitudinal movement of the elongate support rack.

Optionally, the concealable panel-engagement apparatus may be in the form of a kit of parts. This allows the apparatus to be supplied independently of the panel and/or housing, where necessary.

There may also be provided a shelf assembly comprising a shelf housing, at least one shelf, and concealable panel-engagement apparatus, preferably in accordance with the first aspect of the invention, the rack driver and the elongate support rack being received or at least in part receivable within a thickness of the said at least one shelf, and the end peg being retractably extendable from the at least one shelf to engage the shelf housing. Although a shelf assembly is described, any suitable panel-based unit may incorporate the said apparatus, such as a cupboard, wardrobe, dresser and other furniture. Additionally, other possible applications include use in a table, bed and other furniture assemblies, preferably but not exclusively between two components that present, or substantially present, a perpendicular relationship.

In accordance with a second aspect of the invention, there is provided a panel-engagement jig for concealable panel-engagement apparatus. The concealable panel-engagement apparatus in this instance is preferably in accordance with the first aspect of the invention. The panel-engagement jig comprising a first jig body having a movable first drill-bit guide thereon, and a second jig body having a movable second drill-bit guide thereon. In this case, the first and second jig bodies may be movably interconnected with each other.

Furthermore, the first and/or second drill-bit guides may be slidably movable. The first and/or second drill-bit guides may include a guide lock element for releasably locking the said first and/or second drill-bit guide. The first and second jig bodies are preferably slidably movable relative to each other. In this case, the said jig may further comprise a jig-body lock element for releasably locking the first and second jig bodies relative to each other.

The first and second jig bodies preferably extend transversely to each other. Beneficially, the first and second jig bodies may extend perpendicularly or substantially perpendicularly to each other.

In accordance with a third aspect of the invention, there is provided a method of attaching a panel to opposing perimeter support surfaces using concealable panel-engagement apparatus, preferably in accordance with the first aspect of the invention, the method comprising the steps of a] forming a rack-driver opening and a support-rack opening in adjacent surfaces of a panel; b] forming an end-peg opening in a support surface at or adjacent to which the panel will reside; c] inserting the or at least part of the rack driver and the elongate support rack into the carrier-body opening and the support-rack opening, respectively; d] offering the panel into position; e] operating the rack driver such that the support rack extends to engage the end peg through the end-peg opening. As above, the panel is preferably an object support panel, such as a shelf, but may be any suitable panel, such as a divider or partition for, by way of example only, a shelving unit or other housing, and/or carcass panels, housing panels and/or enclosure panels, for example, of a shelving unit, cupboard, container or compartment, wardrobe, dresser, and drawers. Additionally, other possible applications include use in a table, bed and other furniture assemblies, preferably but not exclusively between two components that present, or substantially present, a perpendicular relationship.

Furthermore, a plurality of said rack-driver openings and associated support-rack openings may be formed in a spaced-apart relationship around the panel. For example, where a panel is to be secured between two opposing perimeter supports, four rack-driver openings and associated support-rack openings within a panel are desirable to accommodate four such concealable panel-engagement apparatuses. This affords a panel four points of engagement between the panel and opposing perimeter supports.

Advantageously, one said rack-driver opening may communicate with two said support-rack openings, each said support-rack opening extending in different directions. Additionally, in step c], two said elongate support racks may be inserted into respective support-rack openings and engage with a common rack-driver. In some instances, said rack-driver may be or include the carrier-body, where the two said elongate support racks engage with a pinion of a common said carrier body.

Preferably, in step c], a length of the elongate support rack is cut to fit the support-rack opening.

For a better understanding of the present invention, and to show more clearly how it may be carried into effect, reference will now be made by way of example only to the accompanying drawings, in which: Figure 1 is an isometric view of prior art showing the underside of a conventional support pin arrangement for shelves; Figure 2 is an isometric view showing prior art of how shelves are supported by brackets mounted on vertical rails; Figure 3 is an isometric view showing prior art of how shelves are supported by L' shaped brackets; Figure 4 is a perspective view showing a prior art arrangement of how wood batons are presently used to support shelves inside cupboards having brick, concrete or plaster walls; Figure 5a is a top plan view of one embodiment of a concealable panel-engagement apparatus, according to the first aspect of the invention, wherein a rotatable carrier body is engaged with an elongate support rack; Figure 5b is a side view of the concealable panel-engagement apparatus shown in Figure 5a; Figure Sc is an end side view of the concealable panel-engagement apparatus first shown in Figure 5a; Figure 5d is a three dimensional perspective view of the concealable panel-engagement apparatus first shown in Figure 5a; Figure 5e shows a three dimensional axial cross-section of the rotatable carrier body first shown in Figure 5a, affording a view of a tool receiver recess; Figure 5f shows a top plan view of the elongate support rack first shown in Figure 5a; Figure 5g shows a side view of the elongate support rack first shown in Figure 5a; Figure 5h shows a perspective three dimensional view of the elongate support rack first shown in Figure 5a; Figure 6 is an in-use exploded view of the rotatable carrier body and the elongate support rack being receivable within a panel; Figure 7 is an exploded view of the rotatable carrier body, the elongate support rack and access cover, with the panel and an opposing perimeter support shown in phantom for clarity; Figure 8 shows an in-use side view of the carrier body, the elongate support rack and a disengaged access cover, the end peg of the elongate support rack being engaged with the opposing perimeter support surface; Figure 9a is a perspective view of the panel-engagement jig with arrows indicating possible movement of the first and second drill-bit guides; Figure 9b is a side view of an alternative panel-engagement jig, arrows indicate possible movement of the first and second drill-bit guides, the panel is also shown but in phantom for visualisation of a support-rack opening and a rack-driver opening within said panel; Figure 9c is a front view of the alternative panel-engagement jig as shown in Figure 20 9b; Figure 10 shows two opposing in-use side views of the carrier body, elongate support rack and a disengaged access cover, the end peg of the elongate support rack being engaged with the opposing perimeter support at different angles with respect to the panel; Figure 11 shows an in-use embodiment according to the first aspect of the invention including two elongate support racks engaging with a common pinion of a common carrier body; Figure 12a is a three dimensional representation of a rack lock, the rack lock including rack-lock teeth engageable with the elongate support rack and a second part of the wall portion being devoid of said rack-lock teeth; Figure 12b is a three dimensional representation of the rack lock element with rack lock teeth that differ from those shown in Figure 12a; Figure 13 is an in-use rack lock element including elongate support rack element shown in an engaged condition with the opposing perimeter support; Figure 14 is a hand-holdable driving tool wherein the carrier-engagement bit includes the rotatable carrier body with a flange; Figure 15 shows an in-use exploded view of the hand-holdable driving tool shown in Figure 14, the panel and opposing support surface shown in phantom for clarity; Figure 16 shows another embodiment of the hand-holdable driving tool wherein the carrier-engagement bit includes the rotatable carrier body without a flange and with a pinion presenting a smaller diameter and a pitch that is different to that shown in Figure14; Figure 17a is a hand-holdable driving tool with a carrier-engagement bit that is releasably engageable with a grip, the carrier-engagement bit also being reversible, presenting a screwdriver head on one end and a hex-engagement end on the other; Figure 17c is the carrier-engagement bit as shown in Figure 17a without the grip for clarity, and including opposing end views of the two different engagement shapes, heads or tips as shown in Figures 17b and 17d; Figure 18 is another embodiment of the hand-holdable driving tool including a releasably reversible carrier-engagement bit including a rotatable carrier body on one end and a screwdriver engagement end on the other; Figure 19a is an in-use representation of an embodiment according to the first aspect of the invention including a carrier housing within which is the carrier body, the carrier housing including a leaf spring biasing element arranged with the carrier body to engage the elongate rack body; Figure 19b shows the location of the elongate support rack element, the carrier housing and carrier body within a panel shown in phantom for clarity; Figure 20a shows an in-use elongate support rack, carrier body and a rack-biasing element, the elongate support rack being shown in a retracted condition within the 30 panel; Figure 20b shows the apparatus shown in Figure 20a in an engaged condition with the opposing perimeter support surface; Figure 20c shows the apparatus first shown in Figure 20a in an engaged condition with the opposing perimeter support surface and locked in place by the rack lock element; Figure 21a is a top view of an elongate support rack with a first alternative end peg including one tapered portion; Figure 21b is a side view of the elongate support rack shown in Figure 21a; Figure 21c is a perspective three dimensional view of the elongate support rack shown in Figures 21a and b; Figure 22a is a top view of an elongate support rack with a second alternative end peg including two tapered portions; Figure 22b is a side view of the elongate support rack shown in Figure 22a; Figure 22c is a perspective three dimensional view of the elongate support rack shown in Figures 22a and b; Figure 23a is a further embodiment of an end peg, forming part of the invention, that is disengageable from a rack body, the end peg being cylindrical and presenting a chamfer; Figure 23b is an alternative disengageable end peg that is similarly removable from the rack body and includes a tapered portion; Figure 23c is a second alternative disengageable end peg that is releasable from the rack body and includes two tapered portions; Figure 24a is a third alternative disengageable end peg that is separable from the rack body and includes a movable engagement portion; Figure 24b shows the third alternative disengageable end peg in-use, with movable engagement portion as first shown in Figure 24a along with the rack body and the engaged carrier body, the panel and opposing support surface are shown in phantom for clarity; Figure 24c shows a close-up of the third alternative disengageable end peg in-use with movable engagement portion first shown in Figure 24a, where axial compression caused radial expansion for increased engagement between the third alternative disengageable end peg and end-peg opening in the opposing support surface; Figure 24d shows the third alternative disengageable end peg with movable engagement portion, the rack body engaged with the third alternative disengageable end peg, the rack body including a plurality of longitudinal channels; Figure 24e is an end view of the rack body shown in Figure 24d, illustrating the profiles of the longitudinal channels; Figure 25 shows an exploded side view of the elongate support rack, a fourth alternative disengageable end peg and carrier body, the fourth alternative disengageable end peg being tapered, and the rack body of the elongate support rack presenting teeth that extend circumferentially; Figure 26a shows a further embodiment of an in-use concealable panel-engagement apparatus, in accordance with the present invention and showing a cross-sectional side view of an elongate support rack, a rack-biasing element, and a hand-holdable rack driving tool which is movable linearly to engage and disengage the end peg with the support surface; Figure 26b is an alternative embodiment of the in-use concealable panel-engagement apparatus as shown in Figure 26a, with a modified access opening in the panel for receiving the rack driver; and Figure 27 is an illustration of an example kit of parts, included are rack locks, rotatable carrier bodies, disengageable end pegs, modular rack bodies, access covers, a handholdable driving tool and a panel engagement jig.

Referring firstly to Figures 5a to 5h and to Figure 6, there is shown an embodiment of concealable panel-engagement apparatus 10 comprising an elongate support rack 12 and a rack driver 14. The rack driver 14 in this case is or includes a rotatable carrier body 14a. The elongate support rack 12 being receivable in a panel 16 and comprising an end peg 18 and a rack body 20 with rack openings 22, which in this case are considered to be rack teeth 22a. The rack body 20 includes a portion which is devoid of rack teeth 21 and which is at or adjacent to the end peg 18. The carrier body 14a, which is also receivable in the panel 16, includes a pinion 24 which is engageable with the rack teeth 22a of the elongate support rack 12, best shown in Figure 5b.

The carrier body 14a includes a flange 26 and a second flange 28, the flange 26 is also considered to be a first flange 26, best shown in Figures 5b to 5d. The first and second flanges 26, 28 are axially spaced apart, so as to sandwich the pinion 24. The first and second flanges 26, 28 extend to a greater extent compared to that of the carrier body 14a, so as to overhang the pinion 24. In alternative embodiments, the carrier body may present only one flange or no flanges at all.

The carrier body 14a includes a radially-inner surface 30, best shown in Figure 5e, to complementarily or substantially complementarily receive at least a portion of a body of the support rack 20, also referred to as a rack body 20. The radially-inner surface portion 30 is arcuate so as to receive the body of the support rack 20 which includes a circular cross-sectional profile, best shown in Figures 5c, 5d and 5h.

Alternatively, the radially-inner surface may present a different profile so as to accommodate a body of the support rack that may present a square, rectangular, or more complex cross-sectional profile.

The carrier body 14a also includes a tool receiver 32, best shown in Figure 5d and Figure 5e. The tool receiver 32 being a recess to receive a positive screwdriver, extending radially from a rotational axis 34 of the carrier body 14a on an axially facing surface.

In other instances, a tool receiver is included on each axially facing surface of the carrier body. The tool receivers each being a recess for receiving conventional tools such as positive screwdrivers, negative screwdrivers, star screwdrivers, hexagonal keys and the like. Alternatively, the tool receiver may be or include an engageable protrusion, for example, to receive a socket bit for a wrench.

In-use, the elongate support rack 12 and carrier body 14a are received into the panel 16, best shown in Figure 6. The elongate support rack 12 is inserted into a support-rack opening 36 and the carrier body 14a into a carrier body-opening 38a. Once located within the panel 16, the carrier body 14a with the pinion 24 engage the rack teeth 22a, as shown in Figures 5a to 5d. The carrier body 14a can then be rotated about the rotational axis 34, extending and retracting the end peg 18 of the elongate support rack 12 from within the panel 16. Access to the carrier body 14a for rotational motion is facilitated by a rack-driver opening 38. The carrier body-opening 38a and rack-driver opening 38 may be considered one and the same.

The end peg 18 is first retracted within the panel 16 before being offered into a desired position within an opposing support 40. The opposing support 40 being the effective housing in which said panel 16 will reside. Inclusion of a portion which is devoid of rack teeth 21 at or adjacent to the end peg 18, limits the extent to which the elongate support rack 12 may be retracted within the panel 16. The carrier body 14a is then rotated so as to extend the end peg 18 from the panel 16, engaging with an end-peg opening 42 through an opposing support surface 40a.

Rotation of the carrier body 14a linearly drives the elongate support rack 12 via the pinion 24 meshing with the rack teeth 22a. The conforming nature between the elongate support rack 12 and arcuate radially-inner surface 30, further aided by the first and second flanges 26, 28, helps to maintain alignment between the carrier body 14a and elongate support rack 12 inside the panel 16.

Concealable panel-engagement apparatus 10, as shown in Figures 7 and 8, includes an access cover 44. The access cover 44 includes a carrier-facing surface 46 and an exterior-facing surface 48. The carrier-facing surface 46 has a carrier-engagement element 50 which engages with the rotatable carrier body 14a via the tool receiver 32. In this instance, the tool receiver 32 is also considered to be a tool-receiving opening.

Engagement via the tool receiver 32 is realised in Figures 7 and 8 by the carrier-engagement element 50 being at least in part complimentary to the tool receiver 32.

Relative motion between the access cover 44 and carrier body 14a is restricted or inhibited by an anti-rotation element included in or on the carrier-engagement element 50. The anti-rotation element in the embodiment shown in Figures 7 and 8 realises this by virtue of the carrier-engagement element 50 being at least in part complimentary to the tool-receiving opening 32.

The access cover 44 also includes a side edge 52 which is receivable within or adjacent to the rack-driver opening 38. Engagement between the side edge 52 and the rack-driver opening 38 can be achieved via a frictional interaction or press-fit.

Engagement between the side edge of the access cover and the rack-driver opening can be realised by the inclusion of an anti-rotation element in or on said side edge. The anti-rotational element in some instances may be achieved through a lack of conformity between the side edge and the tool-receiving opening. For example, the rack-driver opening is typically round in nature, although this is not necessarily always the case, the side edges of the access cover may be square or squared-off or polygonal allowing vertices to bite into the panel material surrounding the rack-driver opening. Likewise, engagement can be achieved by differing geometries such as an ovel-in-circle engagement, a cone-in-cone tapered engagement, or even the side edges being slightly larger than the rack-driver opening creating an effective press/interference fit.

Alternatively, the anti-rotational element may be a lug, a flat or a key, resisting or inhibiting rotation of the access cover with respect to the panel by a complimentary lug, flat or key in the rack-driver opening. Additionally, the carrier-facing surface of the access cover may extend to a greater extent compared to the side edge or sides edges so as to fully occlude the rack-driver opening.

In-use, once the end peg 18 has been engaged with the end-peg opening 42, the access cover 44 can be inserted to engage both the carrier body 14a and the rack-driver opening 38. The primary role of the access cover 44 is to conceal the apparatus, and more specifically the carrier body 14a, within the panel 16.

Engagement of the access cover 44 with both the carrier body 14a and the rack-driver opening 38 may also act to help resist any unintentional rotation of the carrier body 14a once the panel 16 is in the desired location.

Figure 9a shows a panel-engagement jig 54 in accordance with the second aspect of the invention. The panel-engagement jig 54 has a first jig body 56 and a second jig body 57 which are slidably interconnected in a perpendicular or substantially perpendicular relationship, defining a first degree of freedom 58.

The first and second jig bodies having a first drill-bit guide 60 and a second drill-bit guide 62, respectively. The first and second drill-bit guides 60, 62 are moveable relative to the respective jig bodies, defining a second degree of freedom 64 and a third degree of freedom 66.

Relative movement between the first and second jig bodies 56, 57 can be releasably locked by the inclusion of a jig-body lock element 67. Likewise, relative movement between the first jig body 56 and first drill-bit guide 60, and second jig body 57 and second drill-bit guide 62 can be releasably locked by the inclusion of a guide lock element 68 for each degree of freedom respectively 64, 66.

Further degrees of freedom of the panel-engagement jig are achieved by a hingeable engagement between the first and second jig bodies, and pivotable engagement between the respective jig bodies and drill-bit guides.

The panel-engagement jig 54 is used to create the support-rack opening 36 and the rack-driver opening 38 with the correct spatial orientation. This is achieved by activating the jig-body lock element 67 and the guide lock elements 68, locking the first and second drill-bit guides 60, 62 into the correct location. The panel 16 is then aligned with the panel-engagement jig 54, wherein the first drill-bit guide 60 guides a cutting tool (not shown) to create the rack-driver opening 38 and the second drill-bit guide 62 guides the cutting tool to create the support-rack opening 36.

Hingeable engagement between the first and second jig bodies, and pivotable engagement between the respective jig bodies and drill-bit guides can help facilitate the possibility of where the panel and the opposing support surfaces are not perpendicular or substantially perpendicular, as illustrated in Figure 10.

Use of such a panel-engagement jig 54 can ensure correct orientation of the support-rack opening 36 relative to the rack-driver opening 38. This is key to the functional engagement of the elongate support rack 12 and the rack driver 14 within the panel 16.

An alternative panel-engagement jig 54', as shown in Figures 9b and 9c, includes a first, second and third jig bodies 56', 57', 57a'. The first and third jig bodies 56', 57a' are parallel or substantially parallel to each other and extend from the second jig body 57' in a perpendicular or substantially perpendicular relationship.

The first and second jig bodies have a first drill-bit guide 60' and a second drill-bit guide 62', respectively. The first and second drill-bit guides 60', 62' are slidably engageable with the respective first and second bodies 56', 57', defining a second and third degree of freedom 64', 66'. A clamp 63' is slidably engageable with the third jig body 57a' allowing the position of a clamping surface 65' between the first and third jig bodies 56' 57a' to be altered to a desired position.

In-use, the alternative panel-engagement jig 54' receives the panel 16 between the first, second and third jig bodies 56', 57', 57a'. The first and second drill-bit guides 60', 62' are positioned to the desired location of the rack-driver opening 38 and the support-rack opening 36, respectively. The clamp 63' is then moved so as to engage the clamping surface 65' with the panel 16, clamping said panel between the first jig body 56' and the clamping surface 65'. The first drill-bit guide 60' is then used to guide the cutting tool (not shown) to create the rack-driver opening 38. Likewise, the second drill-bit guide 62' guides the cutting tool to create the support-rack opening 36.

The panel-engagement jig is primarily for use in, but not necessarily exclusively to, domestic self-build applications and/or by a tradesperson. The jig may be dispensed with, certainly in larger commercial companies, since manufacturers of flat-pack furniture may have a production line which already drills holes in the surfaces and ends of furniture panels to receive cam lock fasteners and associated screw-in pins and dowels to make rigid 90 degree joint connections. The jig of the present invention follows the same surface and end drilling principles. It is envisaged that manufacturer's tooling could be adapted to also drill shelves which can enable the invention to be pre-installed, an option and beneficial feature that is not possible with cam lock fasters.

Furthermore, manufacturers may create only some openings to receive the concealable panel-engagement apparatus. In this instance, the panel-engagement jig may only include the first and second jig bodies and the first or second drill-bit guides.

Likewise, the panel-engagement jig may not include, or only include a selection of the jig-body lock element and the guide lock elements.

Figure 11 shows an embodiment of concealable panel-engagement apparatus 10 according to the first aspect of the invention, where two elongate support racks 12 are simultaneously drivable in opposing directions by a common rack driver. The rack driver in Figure 11 being the rotatable carrier body 14a.

In-use, rotation of the carrier body 14a in one direction drives two elongate support racks 12 to extend from the panel 16 in opposite directions in a spaced apart arrangement. The spacing between the two said elongate support racks 12 being defined by the dimensions of the associated pinion.

A rack lock 70, as shown in Figure 12a, may also be included in the concealable panel-engagement apparatus 10. The rack lock 70 is engageable with the rack teeth 22a of the elongate support rack 12 in place of a carrier body 14a. The rack lock element 70 includes a circumferential wall portion 72 with a first wall portion 74 and a second wall portion 76. The first wall portion 74 including rack-lock teeth 78. The second wall portion 76, also considered a second part of the wall portion, being devoid of said rack-lock teeth.

Referring now to Figure 12b, there is shown an alternative embodiment of the rack lock 70' to that shown in Figure 12a. Like references refer to the same or similar parts, and therefore further detailed description is omitted for conciseness. In this case, the first wall portion 74' includes rack-lock teeth 78' of a differing pitch to engage with complimentary rack-lock teeth. Rack lock 70' also presents a smaller circumference to the rack lock 70 shown in Figure 12a. This allows rack lock 70' to be accommodated within a narrower carrier-body opening 38a compared to that of rack lock 70.

The rack lock element may be engageable with the access cover. This is realised by the rack lock element presenting one or more recesses on axial facing surfaces for receiving the carrier-engagement element of the access cover.

In-use, the carrier body 14a is first extracted from the panel 16 via the rack-driver opening 38. This can be achieved where; the carrier body 14a includes only one flange, the second flange is detachable from the carrier body, or in the instance when the carrier body 14a forms part of a hand-holdable driving tool 80. The rack lock 70 is then inserted in place of the carrier body 14a, as shown in Figure 13, preventing or limiting unintentional linear motion of the elongate support rack 12 within the panel 16. This is achieved first by the second part of the wall portion 76 being devoid of said rack-lock teeth, limiting relative motion between the rack teeth 22a and the rack-lock teeth 78. Secondly, relative motion between the rack lock 70 and panel 16 is limited by the geometry of the rack-driver opening, thereby locking the elongate support rack 12 in place.

In yet another embodiment, the rack driver may be or include the hand-holdable driving tool 80. Figure 14 shows such a hand-holdable driving tool 80 having a grip 82, a shaft 84 which extends from the grip 82, and a carrier-engagement bit 86, head or end which includes the carrier body 14a and which is provided at the opposing end of the shaft 84. The carrier body 14a also includes a flange 26 for improved alignment in the carrier-body opening 38a and to aid meshing between the carrier body 14a and rack teeth 22a.

In-use, the carrier-engagement bit 86 of the hand holdable driving tool 80 can be used to directly engage the rack teeth 22a to move the elongate support rack 12 within the panel 16, as shown in Figure 15. In this case, the user can interact with or hold the grip 82 for convenient operation of the carrier-engagement bit which can perform the same function as the carrier body 14a. The single flanged carrier-engagement end 86 is then disengaged easily by virtue of being a hand holdable tool. The space is then filled using a rack lock 70 which may be of different materials, sizes, shapes and colours, that prevent the end pegs 18 disengaging.

Other embodiments of the hand-holdable driving tool 80', as shown in Figure 16, also include a rotatable carrier body 14a' with the pinion of differing pitch and smaller diameter compared to that shown in Figure 15. In this particular embodiment, the carrier-engagement bit 86' does not include a flange.

A grip 82a and a carrier-engagement bit 86a, 86a' can also be of modular parts as shown in Figure 17a. In this case, the carrier-engagement bit 86a, 86a' is releasably engageable with the grip 82a. The releasable nature of the carrier-engagement bit 86a, 86a' can also afford two different shapes for engagement with a complementary tool receiver of the carrier body 14a. Figure 17c shows the spatial arrangement when a screwdriver 86a, as shown in Figure 17b, and hexagonal key 86a', as shown in Figure 17d, are included at opposing ends of the shaft 84a of such a hand-holdable driving tool 80a.

Similar to the hand-holdable driving tool 80a shown in Figures 17a, to 17d, in an alternative arrangement of the hand-holdable driving tool 80a', one end of the reversible carrier-engagement bit 86a" may include a carrier body 14a, for direct engagement with the elongate support rack 12, similar to that shown in Figure 18.

In a further embodiment of the concealable panel-engagement apparatus 10, it is envisaged that the carrier body 14a may be rotatably receivable within a carrier housing 88, as shown in Figures 19a and 19b. The housing having a rack-access opening 90, a tool-receiver opening 92 and, preferably, at least one anti-rotation element 94. Interposed between the carrier body 14a and carrier housing 88 may be a carrier-biasing element 96 which is a leaf spring for biasing an end portion 98 of the carrier body 14a against the elongate support rack 12.

The carrier-biasing element might also be or include a linear spring, torsion spring or an elastically compressible body. The carrier-biasing element might be included in the absence of the carrier housing. In this case, the carrier-biasing element is interposed between the carrier body and an internal surface of the carrier body-opening within the panel. Likewise, the carrier housing may be included without the carrier-biasing element.

In the instance where the concealable panel-engagement apparatus includes a carrier-biasing element, the carrier body may also incorporate aspects from both the pinion and the rack lock. In this case, a pinion and a rack lock portion are located axially adjacent to each other on a single carrier body. The rack lock portion includes rack-lock teeth that a common to the pinion portion, and at least one portion that is devoid of rack-lock teeth.

The anti-rotation element or anti-rotation elements may be a pin or pins that protrude from an external carrier housing surface.

In-use the carrier housing 88 is secured within the panel. Relative motion between said panel 16 and carrier housing 88 is achieved by a compressive fit and or by the inclusion of the anti-rotation element 94 or anti-rotation elements. The hand-holdable driving tool engages with the carrier body 14a via the tool-receiver opening 92.

Axial force, transmitted through the hand-holdable driving tool, depresses the carrier-biasing element 96, disengaging the end portion 98 of the carrier body 14a away from the elongate support rack 12. The carrier body 14a is then free to rotate unhindered, linearly driving the elongate support rack 12. Wien the carrier-biasing element 96 is not depressed, the end portion 98 engages the elongate support rack 12, thus resisting unintentional movement of the elongate support rack 12 within the panel 16.

In the instance where the concealable panel-engagement apparatus includes a carrier-biasing element and a carrier body that comprises both the pinion and rack lock portion, the carrier-biasing element biases the carrier body to engage the rack lock portion with the elongate support rack. Unintentional linear movement of the elongate support rack within the panel is prevented by the portion or portions that are devoid of rack-lock teeth engaging with the rack teeth of the elongate support rack. By depressing the carrier-biasing element, the rack lock portion is disengaged with the rack lock portion and engaged with the pinion portion.

Figure 20a shows an embodiment that includes a rack-biasing element 100. In this case, a spring interposed between the support-rack opening 36 and elongate support rack 12 biases the elongate support rack 12 to extend from the panel 16.

In other instances, the rack-biasing element may be or include a torsion spring interposed between the carrier body and the carrier housing or the panel.

In-use, the elongate support rack 12 is retracted within the support-rack opening 36 by operating the carrier body 14a, depressing the rack-biasing element 100, as shown in Figure 20a. The rack-driver, in this case the carrier body 14a, is then released allowing the end peg 18 to extend from the panel 16 to engage the opposing support 40, as shown in Figure 20b. The rack lock element 70 can then be engaged with the elongate support rack 12, locking it in place, as shown in Figure 20c.

Where the rack-biasing element is or includes a torsion spring interposed between the carrier body and the carrier housing or the panel, the elongate support rack is biased into an extended state via the carrier body.

Alternative elongate support racks 12b with different end pegs compared to that first shown in Figure 5a, can be used to better engage with various opposing supports, including shelves where the vertical supports may be walls. For example, Figures 21a, 21b and 21c show a first alternative end peg 18' including a tapered portion which can be used to indent vertical supports such as those made from wood, marking the desired location of an end-peg opening. Figures 22a, 22b and 22c show a second altemative end peg 18" including two tapered portions, better suited to engage concrete or plaster vertical supports. Inclusion of tapered portions can be used to indent the opposing support surface 40a, marking the centres for drilling in the opposing support surface 40a where Rawl Plug RTM may be first inserted into which the end peg 18" can be engaged.

A further embodiment of an end peg, forming part of the invention, includes end pegs that are disengageable 18a, 18a', 18a" from the rack body 20a, as shown in Figures 23a, 23b and 23c. Releasable engagement between the said end peg 18a, 18a', 18a" and the rack body 20a may be facilitated by a bayonet connection, threaded connection or interference fit.

A third alternative disengageable end peg 18b, as shown in Figure 24a, includes a movable engagement portion 102. Upon axial compression of the third alternative disengageable end peg 18b, as shown in Figure 24b, the movable engagement portion 102 increases radially with axial compression. Radial expansion of the movable engagement portion 102 can increase conformity due to deformation, as shown in Figure 24c.

An alternative rack body embodiment 20b includes longitudinal channels 104 which extend along at least a majority of a longitudinal extent, as shown in Figures 24d and 24e.

The rack openings 22 in another embodiment of the rack body 20c extend around the full circumference as shown in Figure 25. In this case, a fourth alternative disengageable end peg 18c is also shown with the carrier body 14a. The embodiment in Figure 25 also includes a through-bore 106 which may be used to secure the fourth alternative disengageable 18c end peg with the rack body 20 by use of a bolt. In this case a complimentary threaded female bore and taper in the end peg would be required.

A further embodiment of concealable panel-engagement apparatus 10, in accordance with the present invention, is shown in Figure 26a. The apparatus comprises the elongate support rack 12, a hand-holdable rack driving tool 80b which is movable linearly to engage and disengage the end peg 18 with the opposing support 40. In this instance, the rack driver 14 is an engagement bit 86b of the hand-holdable rack driving tool 80b. The rack-driver opening 38' in this case is a slot.

Figure 26b shows the said further embodiment of concealable panel-engagement apparatus 10 with a modified access opening 38", also considered to be the rack-driver opening, so as to engender pivotal motion of the hand-holdable rack driving tool 80b to engage and disengage the end peg 18.

The further embodiment of concealable panel-engagement apparatus 10 as shown in Figures 26a and 26b may include an access cover. The access cover includes a rack-facing surface and an exterior-facing surface. The rack-facing surface having at least one rack-engagement element for engaging one or more of the said rack openings 22.

Engagement between the access cover, the rack openings 22, and the rack-driver opening 38, prevents or inhibit longitudinal movement of the elongate support rack 12.

The hand-holdable driving tool 80b in this instance includes a tapered carrier-engagement bit 86b that directly engages with the rack openings 22. It is also envisaged that the hand-holdable driving tool 80b with more conventional tool carrier-engagement bits may be used to engaged and disengage the end peg 18.

In accordance with a third aspect of the invention, there is provided a method of attaching the panel 16 to the opposing perimeter support surfaces 40a using the concealable panel-engagement apparatus 10. The first step includes formation of the rack-driver opening 38 and the support-rack opening 36 in adjacent surfaces of a panel 16. The second step includes forming an end-peg opening 42 in a support surface 40a at or adjacent to which the panel 16 will reside, inserting the rack driver 14 and the elongate support rack into the carrier-body opening 36a and the support-rack opening 36, respectively. The third step comprises offering the panel 16 into position; and the final step includes operation of the rack driver 14 such that the support rack extends to engage the end peg 18 through the end-peg opening 42.

The method includes the formation of multiple end peg, rack-driver and associated support-rack openings for insertion of any one or combination of embodiments according to the first aspect of the invention. Additionally, the elongate support racks may be cut to fit within the panel.

Alternatively, the concealable panel-engagement apparatus may be provided as a kit of parts. An example of the kit of parts 108 that may be provided can be seen in Figure 27. The example kit of parts 108 includes: rack locks 70, 70', rotatable carrier bodies 14a, disengageable end pegs 18a, 18a', 18c, modular rack bodies 20a, 20c, access covers 44, a hand-holdable driving tool 80a and a panel engagement jig 54'.

The concealable panel-engagement apparatus and any part thereof may comprise or be formed of metal, wood, plastic, composite, any other suitable material, or any combination thereof.

The words 'comprises/comprising' and the words 'having/including' when used herein with reference to the present invention are used to specify the presence of stated features, integers, steps or components, but do not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.

It is appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable sub-combination.

The embodiments described above are provided by way of examples only, and various other modifications will be apparent to persons skilled in the field without departing from the scope of the invention as defined herein.

Claims

Claims 1. Concealable panel-engagement apparatus for attaching a panel to opposing perimeter support surfaces, the concealable panel-engagement apparatus comprising: at least one elongate support rack which is receivable in a said panel and which has a plurality of rack openings and an end peg extendable from the panel; and a rack driver which is engageable with one or more of the rack openings to move the end peg into a said perimeter support surface adjacent to the panel.
2. Concealable panel-engagement apparatus as claimed in claim 1, wherein the rack driver includes a rotatable carrier body which is receivable in the said panel, and a pinion on the carrier body; and the plurality of rack openings are rack teeth which are engageable with the pinion.
3. Concealable panel-engagement apparatus as claimed in claim 2, wherein the carrier body includes a flange which is axially at or adjacent to the pinion.
4. Concealable panel-engagement apparatus as claimed in claim 3, wherein the carrier body includes a second flange, the first said flange and the second flange being axially spaced apart, so that the pinion is therebetween.
5. Concealable panel-engagement apparatus as claimed in any one of claims 2 to 4, wherein a radial extent of the or each said flange is greater than a radial extent of the pinion, so that the or each said flange overhangs the pinion.
6. Concealable panel-engagement apparatus as claimed in any one of claims 2 to 5, wherein the carrier body includes a radially-inner surface to complementarily or substantially complementarily receive at least a portion of a body of the support rack.
7. Concealable panel-engagement apparatus as claimed in claim 6, wherein the radially-inner surface is at least in part arcuate.
8. Concealable panel-engagement apparatus as claimed in any one of claims 2 to 7, wherein the carrier body includes a tool receiver.
9. Concealable panel-engagement apparatus as claimed in claim 8, wherein the tool receiver is a recess that extends radially from a rotational axis of the carrier body.
10. Concealable panel-engagement apparatus as claimed in any one of claims 2 to 9, further comprising a rack lock element which is engageable with the elongate support rack to replace the carrier body, the rack lock element including a circumferential wall portion, one or more rack-lock teeth being on a first part of the wall portion and a second part of the wall portion being devoid of said rack-lock teeth.
11 Concealable panel-engagement apparatus as claimed in any one of claims 2 to 10, further comprising a carrier housing in which the carrier body is rotatably received, the carrier housing having a rack-access opening for engagement with the support rack, and tool-receiver opening for receiving a tool by which the carrier body is rotatable.
12. Concealable panel-engagement apparatus as claimed in claim 11, wherein the carrier housing includes a carrier-biasing element for biasing an end portion of the carrier body against the support rack to prevent or inhibit unintentional longitudinal movement of the support rack.
13. Concealable panel-engagement apparatus as claimed in claim 11 or claim 12, further comprising at least one anti-rotation element on the carrier housing which, in-use, is engageable with an interior of the panel to prevent or limit rotational movement of the carrier housing.
14. Concealable panel-engagement apparatus as claimed in any one of claims 2 to 13, further comprising an access cover which is engageable with the carrier body.
15. Concealable panel-engagement apparatus as claimed in claim 14, wherein the access cover includes a carrier-facing surface and an exterior-facing surface, the carrier-facing surface having a carrier-engagement element for engaging the rotatable carrier body.
16. Concealable panel-engagement apparatus as claimed in claim 15, wherein the carrier-engagement element is at least in part complementarily shaped for receipt in a tool-receiving opening of the rotatable carrier body.
17. Concealable panel-engagement apparatus as claimed in any one of claims 1 to 16, wherein the elongate support rack includes a body portion which is devoid of rack teeth and which is at or adjacent to the end peg.
18. Concealable panel-engagement apparatus as claimed in any one of claims 1 to 17, further comprising a plurality of selectable said elongate support racks, each having a different said end peg.
19. Concealable panel-engagement apparatus as claimed in any one of claims 1 to 18, wherein the elongate support rack includes one or more longitudinal channels which extend along at least a majority of a longitudinal extent thereof, the or each longitudinal channel preventing or inhibiting unintentional axial rotation of the elongate support rack.
20. Concealable panel-engagement apparatus as claimed in any one of claims 1 to 19, wherein the rack driver includes a rack-biasing element which biases the elongate support rack into a support-surface engagement condition.
21. Concealable panel-engagement apparatus as claimed in claim 2 or claim 3, in combination with a hand-grip which extends from the said carrier body.
22. Concealable panel-engagement apparatus for attaching a panel to opposing perimeter support surfaces, the concealable panel-engagement apparatus comprising: a rotatable carrier body which is receivable in a said panel; a pinion on the carrier body; and at least one elongate support rack having a plurality of rack teeth engageable with the pinion and an end peg extendable from the panel and into a said perimeter support surface.
23. Concealable panel-engagement apparatus as claimed in any one of the preceding claims, in the form of a kit of parts.
24. A panel-engagement jig for concealable panel-engagement apparatus as claimed in any one of claims 1 to 23, the panel-engagement jig comprising a first jig body having a movable first drill-bit guide thereon, and a second jig body having a movable second drill-bit guide thereon.
25. A method of attaching a panel to opposing perimeter support surfaces using concealable panel-engagement apparatus as claimed in any one of claims 1 to 23, the method comprising the steps of: a] forming a rack-driver opening and a support-rack opening in adjacent surfaces of a panel; b] forming an end-peg opening in a support surface at or adjacent to which the panel will reside; c] inserting the or at least part of the rack driver and the elongate support rack into a carrier-body opening and the support-rack opening, respectively; d] offering the panel into position; e] operating the rack driver such that the support rack extends to engage the end peg through the end-peg opening.