BACKGROUND Known forms of mail sorting stands are described in NZ patent specification 23409, US patent 5,590, 794 and EP patent specification 635316, for example. Each stand generally consists of a framework providing at different heights rows of boxes or shelves which are partitioned to form slots or bins into which the mail is sorted by criteria such as street address. Typically a number of stands can be arranged together to increase the number of slots as required. An operator using a sorting stand is presented with one or more planar arrays of slots into which large numbers of mail items must be individually placed. The slots may be arranged and labelled in various ways. Slots which represent house numbers along a street may be distributed horizontally along a shelf, for example. The streets within a district may be distributed vertically on respective shelves.

SUMMARY OF INVENTION It is an object of the invention to provide an improved or at least alternative form of mail sorting stand, and variants of the stand of the invention may also have applications other than as a mail sorting stand.

In broad terms in one aspect the invention comprises a stand for mail sorting or other applications, which is of modular construction and includes one or more upright tubular frame members and a shelving system consisting of one or more shelves each connectable to the frame members by bracket parts enabling the shelves to be mounted to and removed from the upright frame members from one side or from the front of the frame members.

In broad terms in another aspect the invention comprises a stand for mail sorting or other applications, including one or more upright tubular frame members and a shelving system consisting of one or more shelves each connectable to the frame members by one or more bracket parts each including an entry on one side enabling the shelves to be mounted to and removed from the. upright frame members from one side of the frame members.

In a preferred form the bracket parts include a hollow interior defined between an upper portion for engaging an upright member from the rear and a lower portion for engaging the upright member from the front when a shelf is mounted to the upright members, and an entry in the form of a longitudinally extending aperture on one side of the bracket part, so that the shelves may be mounted to the upright members by tilting a shelf upwardly from it's normal mounted position, moving the shelf on to the upright members from one side so that the tubular upright members pass through the entry passage into the brackets, and then dropping the shelf downwardly, to engage the shelf in position on to the upright members (and the reverse for removal).

Preferably the shelf members also include a lightweight tubular frame carried by the bracket parts for mounting a tray, bin (s), basket (s), or similar.

By tubular in relation to the upright frame member (s) is meant not only metal or plastic tube of a circular cross-section but also upright members having a hollow oval, square, or rectangular or other cross-sectional shape, and also in it's broadest sense the lightweight upright members forming the frame of the stand which may not have a closed tubular section but may have a U or C shaped cross-section shape for example.

In broad terms in another aspect the invention comprises a support part or bracket for supporting an item from an upright member, including a hollow interior defined between an upper portion for engaging the upright member from the rear and a lower portion for engaging the upright member from the front when the item is mounted to the upright member, and an entry in the form of a longitudinally extending aperture on one side of the support part, so that the item may be mounted to the upright member by tilting the support part upwardly from it's normal mounted position, moving the support part on to the upright member from one side so that the tubular upright member passes through the entry passage into the support part, and then dropping the item downwardly, to engage the item in position on to the upright member (and the reverse for removal).

BRIEF DESCRIPTION OF THE DRAWINGS The invention is further described with reference to the accompanying drawings which show a preferred form mail sorting stand of the invention, by way of example and without intending to be limiting. In the drawings: Figure 1 is a perspective view of the preferred form mail sorting stand, Figure 2 is a view of the preferred form mail sorting stand from the front, Figure 3 is a view of the preferred form mail sorting standing stand from one side, Figure 4 is a view of the preferred form mail sorting stand from the rear, Figure 5 is a view of the preferred form mail sorting stand from above, Figure 6 is a view from one side of one shelf and bracket member of the preferred form mail sorting stand, in the direction of arrow A in Figure 2,

Figure 7 is a perspective view from a rear corner of a part of one side of the preferred form mail sorting stand, Figure 8 is a view from the rear showing engagement of a shelf via one of its support brackets on to the upright frame member of the mail sorting stand, and Figure 9 is a perspective view of one tray part of the preferred form mail sorting stand.

DETAILED DESCRIPTION OF PREFERRED FORM The drawings show a mail sorting stand but it will be apparent that a stand comprising a lightweight tubular frame supporting shelves as generally described may have other applications, and also that in such other applications the shelves instead of supporting flat trays may support baskets or bins or similar, or combinations of trays, baskets, or bins etc.

Referring to Figure 1 the stand comprises a frame formed by upright tubular frame members 1, to which are mounted shelves as shown. In a preferred form the stand is of a lightweight tubular form as shown, and the shelves also each include a tubular frame 2 as shown.

Each shelf frame 2 carries two bracket parts 3 which are spaced apart to match the spacing of the frame uprights 1 by which the shelves are mounted to the uprights 1.

Referring to Figs 6 to 8 in particular, each bracket part 3 has a hollow interior 4, an interiorly curved upper portion 5 which engages the upright member 1 from the rear when the shelf is mounted to the uprights, and an interiorly curved lower portion 6 which engages the upright 1 from the front. Each bracket also has an entry in the form of a longitudinal passage 7 as shown.

To mount a shelf to the upright members 1 of the stand the shelf is held tilted upwardly relative to Figure 6, so that the side entry passage 7 of each bracket aligns with an

upright member 1, and the shelf is moved from the side towards the upright member so that the upright members are engaged through the entry passages 7 and into the hollow interior of the brackets. The front of the shelf is then dropped ie pivoted downwardly, until the shelf has the position shown in Figure 6, so that the rear and front portions of the bracket contact the upright member as shown. In Figures 1 to 4 and 7 the third shelf down from the top is shown after the bracket parts have been engaged on to uprights but with the shelf pivoted or dropped only partly towards it's mounted position. Figure 8 shows the relative positions of the bracket part and an upright relative to one another after the shelf has been moved sideways to pass the upright member into the entry passage 7 of the bracket, but before dropping of the shelf downwardly. Figure 6 shows the shelf and bracket from one side after the shelf has been dropped fully downwardly to mount the shelf on the uprights.

To further ensure that the shelves are securely located when mounted to the frame of the stand the upright members 1 may include a series of apertures or indentations 8 as shown in Fig 2, into which a small protrusion (not shown) from the interior of the brackets may locate when the shelves are mounted to the frame of the stand.

Typically the bracket parts 3 are moulded from plastic and the tubular frame 2 of the shelves 2 is formed from for example powder coated or painted metal tube, the ends of which engage into bores in the bracket parts 3 as shown. The shelf frames 2 may be available in a variety of standard lengths to provide a variety of shelve lengths on a standard stand frame. The shelf frames may be provided in a variety of sizes to support trays or bins or baskets of a variety of dimensions.

In a mail sorting application at least a number of the shelves support trays 10 as shown.

In the preferred form the trays comprise a base 10 and rear wall 11 (see Figs 7 and 9).

A part 12 is formed along the rear wall 11 which will clip on to a transverse rear part 2a of the tubular shelf frame as shown particularly in Fig 8. The front part of the tray 10 sits on a forward transverse part of the shelf frame 2.

The trays 10 may be made in a variety of standard lengths, but are preferably formed as a series of interconnectable tray segments, one of which is shown in Figure 9. Each segment includes a protruding part 13 on one side which can engage into a corresponding recess 14 on the edge of another tray segment, to couple a number of segments together to form a tray of the desired width. The trays will also typically be formed with a series of parallel slots 15 for mounting partitions 16 as shown.

Alternatively the shelves may support a shallow (or deeper) bin 17, or alternatively a tray or bin or basket in any other suitable form. Typically the trays and bins are moulded from plastic, but may alternatively be folded from sheet metal.

The apparatus is intended to be efficient and ergonomic so that a human operator is able to distribute mail items quickly by hand among a range of slots using natural movements.

One major benefit of the preferred form mail sorting apparatus as described is the ease with which shelves may be mounted and demounted from the backbone frame. Thus the stand or series of adjacent stands is easily reconfigurable with a different number of shelves or to position the shelves at different heights, with relative ease. Removal of one shelf or adjusting the heights of existing shelves to enable another shelf to be added, can be carried out quickly and readily. In at least some prior art in mail sorting stands the individual shelves mount over a backbone member from above in series, so that to remove a shelf lower down for example may require that the shelves above are first lifted up to the top of and from the backbone frame. Another benefit of the preferred form mail sorting stand as shown is its lightweight tubular and modular construction.

As shown the stand may also include wheels 18 as well as feet 19 in which enable the stand to be moved wheelbarrow-like fashion.

In another form of stand of the invention similar benefits of ease of mounting and demounting of shelves from the backbone frame may be achieved by brackets or bracket parts which support shelves and which also engage tubular uprights but from the front, with the brackets having a rearwardly facing U-shape in cross-section, which

engage onto the tubular uprights from the front, and a catch at the rear which closes and tightens the bracket about the uprights. Again to assist in securely locating the shelves the stand may include a similar arrangement of a protrusion, from the U-shaped interior of the bracket, which engages recesses or a toothed track or similar on the front of the uprights 1.

The preferred form stand described comprises two tubular uprights but in an alternative arrangement a single larger diameter tubular upright may be provided, which may be of a square, rectangular or oval cross-section for example, and each shelf may be supported by a single larger bracket or bracket part of a similar form which enables the shelf to be mounted and demounted from such a single tubular upright, generally in the same manner as described. Alternatively again a wider stand may comprise three spaced upright members 1 and each shelf may include three spaced brackets 3 or equivalent.

In the preferred form the brackets 3 and tubular shelf frame 2 are separate components which are fitted together, and then separate plastic moulded bracket or metal folder bracket trays or bins are fitted to the shelf frames 2 as described, but in alternative form the brackets or bracket parts may be integrally moulded (or die cast) with plastic or metal shelf frames. Alternatively again trays or bins of sufficient rigidity may have bracket parts generally as described formed integrally on an exterior of the rear wall.

As stated the preferred form stand of the invention is a mail sorting stand but a variants may have other applications, such as supporting parts of bins, a retail display shelving, and similar.

The foregoing describes the invention including a preferred form thereof. Alterations and modifications as will be obvious to those skilled in the art are intended to be incorporated within the scope thereof as defined in the accompanying claims.