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(11) | EP 1 790 250 A2 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Self-supporting shelf for a cabinet, in particular a refrigerator |
| (57) A shelf for a cabinet (3), comprising a body (7) to be disposed in at least one cavity
(2) of said cabinet (3), in this latter the body (7) being positioned transversely
to present a flat surface (8) intended to support products, the body (7) presenting
opposing sides (22, 23) to be positioned facing corresponding side walls (2A and 2B)
of said cavity (2); the body (7) of the shelf (1) comprises at least two parts (10,
11; 100, 102; 90, 91, 92) lockable in a working position in which said body is substantially
flat and its opposing sides (22, 23) cooperate with the side walls (2A and 2B) of
the cavity (2); said sides (22, 23) carrying coupling means (24) to be positioned
on said walls (2A and 2B) when said body (7) is in said working position so as to
fix it to said walls and enable the shelf (1) to be self-supporting in said cavity
(2) in a substantially flat position.
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[0001] The present invention relates to a shelf for a cabinet, in particular a refrigerator, in accordance with the introduction to the main claim.
[0002] A refrigerator is known to comprise at least one preservation cavity in which at least one shelf is positioned to support products or foods. This shelf usually has a flat body which is positioned on guides projecting from side walls of said cavity to assume a transverse position in the cavity and enable said products or foods to be supported. Said body can be defined by a grid or by a transparent or non-transparent solid element, these being of plastic (for example produced by blow or injection moulding), glass or metal. Said body comprises opposing sides to lie in proximity to the side walls of the refrigerator cavity and to rest on the guides present on said walls.
[0003] From the aforegoing it is apparent that known refrigerators require guides integrated into the cavity structure, or supports applied to the walls of said cavity to enable at least one shelf to be disposed transversely within the cavity and enable articles to be supported. This requirement determines special production techniques for the refrigerator cabinet defining the cavity, which have to take into account the presence of the guides themselves. This makes it relatively difficult to produce the cabinet and makes its shape relatively complex. This is due to the need to provide several guides at different heights on the opposing side walls of the refrigerator cavity in order to allow suitable versatility in positioning the shelf within the cavity. This versatility is however limited to a finite number of possible shelf positions, with consequent constraints on the configuration and utilization of the internal space within the cabinet, in optimizing its use.
[0004] An object of the present invention is to provide a shelf for a cabinet, in particular for a refrigerator, which is self-supporting in a cavity thereof without said cavity presenting specific means for this support.
[0005] A second object is to provide a shelf of simple and intuitive use during its insertion into the cavity of a cabinet, in particular of a refrigerator, and its fixing into this latter.
[0006] A third object is to provide a shelf which can be easily positioned and repositioned within a smooth-walled cavity at levels which are not predefined, to provide greater versatility in the utilisation of the interior cabinet space.
[0007] A further object is to provide a shelf of the stated type by which the refrigerator production operations are simplified and their costs reduced. These and other objects which will be apparent to the expert of the art are attained by a refrigerator shelf in accordance with the accompanying claims.
[0008] The present invention will be more apparent from the accompanying drawings, which are provided by way of non-limiting example and in which:
Figure 1 is a perspective schematic view of a first shelf positioned within a refrigerator cavity, and of a second shelf shown in various stages of its positioning within the cavity;
Figure 2 is a view similar to Figure 1 but taken from a different angle, and in which the second shelf is in a particular stage of its positioning;
Figures 3, 4 and 5 are perspective views of different embodiments of a part of the shelf according to the invention;
Figures 6A and 6B are perspective views of a different part of the shelf of the invention, shown in two different stages of its hinging to the refrigerator cavity;
Figure 7 is a perspective view of a first variant of the shelf according to the invention;
Figures 8A and 8B are perspective views of a third variant of the shelf according to the invention, shown in two different working positions;
Figures 8C and 8D are a partially sectional perspective view of a detail of the shelf locking mechanism according to the invention, shown in the two different working positions; and
Figures 9A and 9B are perspective views of a fourth variant of the shelf according to the invention, shown in two different positioning stages.
[0009] With reference to said figures, each shelf of the invention is indicated overall by 1 and is intended to be inserted into a cavity 2 of a cabinet 3 of a refrigerator 4. The cavity 2 presents opposing side walls 2A and 2B to cooperate with the shelf 1 self-supporting on them. The walls 2A and 2B are smooth or at least do not present elements for supporting said shelf 1.
[0010] More specifically, with reference to Figures 1 and 2, the shelf 1 comprises a body 7, which after its insertion and fixing into the cavity 2, becomes a flat support surface 8 for supporting foods or other products to be preserved in the refrigerator. According to the invention, the body 7 comprises at least two hinged-together cooperating portions 10, 11 to be disposed at a contained angle of greater than 180° on the surface 8 during their insertion into the cavity 2, but which become perfectly aligned (to hence define the flat surface 8) after their fixing to the walls of the cavity 2.
[0011] In the embodiment of Figures 1-6B, the two hinged portions consist of two parts 10, 11 of the body 7 which define the said surface 8. These parts 10, 11 are hinged together and rotate about a common hinging axis: the first part 10 presents, along an edge 13 facing the corresponding edge 14 of the second part 11, a first hinge element 15 defining a substantially circular seat 20 to receive a substantially circular piece 16 defining a second hinge element 17 rigid with the second part 11 of the body 7 of the shelf 1. The hinge elements 15 and 17 lie along that shelf surface opposite the supporting surface 8.
[0012] The second hinge element 17 is coupled to the first 15 in known manner, for example by snap-engagement (particularly if the body 7 is of plastic) or in any other known manner.
[0013] The two parts 10 and 11 of the body 7 are therefore mutually movable and can be disposed at an angle to or aligned with each other. Each part 10, 11 is coupled along its free end 10A, 11A (to hence define a side 22 or 23 of the body 7 of the shelf 1) to a coupling member 24 for fixing said body to the corresponding wall 2A or 2B of the cavity 2 of the refrigerator 4.
[0014] Each of these coupling and fixing members 24 cooperates by friction with the corresponding wall 2A, 2B in order to fix the shelf to this latter and support it thereon.
[0015] More specifically, each coupling and fixing member 24 is made of rubber (natural or synthetic) or other (known) material of high friction coefficient and is securely fixed to the corresponding side 22 or 23 of the part 10, 11 of the shelf 1. Fixing can be by various methods, including gluing, clinching, pressing, co-injection or the like. It can also be achieved by coupling a part 24A of this member to a seat 26 provided in the corresponding side 22 or 23 (Figure 3).
[0016] Each coupling and fixing member can be in the form of a compact piece (Figures 3 and 4) or present a plurality of sucker pads (Figure 5). In all cases it comprises a part 28 to cooperate by friction with the corresponding wall 2A, 2B and to lie flat at least when this cooperation has taken place, said part 28 presenting a relatively large surface to achieve better coupling to said wall. The area of this surface is suitably calculated to generate a required friction on the cavity wall in relation to the thrust L exerted by the shelf 1 on the walls 2A and 2B of the cavity 2 when mounted in the cabinet 3: the larger the surface of the part 28, the greater the friction generated on the corresponding wall for an equal exerted thrust L, and hence the greater the bond between the shelf 1 and the walls 2A and 2B which enables the articles resting on said shelf to be supported. By virtue to this friction, the shelf 1 is self-supporting on the refrigerator walls 2A and 2B, and can be installed and subsequently reposition at any non-predefined level h within the cavity 2.
[0017] Positioning members 30, possibly integrated into the construction of the coupling and fixing members 24, can also be present on the sides 22, 23 to facilitate correct mounting of the shelf 1 by ensuring its substantial positioning planarity within the refrigerator cavity 2.
[0018] These positioning members consist for example of fins 30 (visible in Figure 4) extending in a direction perpendicular to the individual parts 10, 11 of the shelf 1; they have a length sufficient to prevent the shelf from undergoing the behaviour required for mounted, as described hereinafter (i.e. to prevent the two half portions 10, 11 from assuming a substantially flat angle α, and hence prevent stable locking of the shelf), if the two parts 10, 11 are not individually aligned in a manner sufficiently perpendicular to the respective walls 2A and 2B. At the same time the positioning members enable a substantially flat mutual arrangement to be maintained, so enabling the thrust L to be generated by the shelf 1 on said walls 2A and 2B in such a manner as to generate sufficient friction for the shelf to support itself and support the articles resting on it.
[0019] The shelf 1 is mounted in the cavity 2 in the following manner: during the insertion and positioning of the shelf, the two parts 10, 11 are rotated relative to each other so that they can be easily inserted into the refrigerator compartment (Figure 1). When the shelf has been inserted into the compartment 2 its two sides 22, 23 are positioned at the required height h and aligned with the walls 2A and 2B by the positioning members 30. A force F is applied vertically along the axis of rotation of the two parts 10, 11 of the shelf to vertically move this latter. Its sides, resting against the side walls 2A and 2B, rotate about the hinging axis (see the parts indicated by 1 K, 1 H in Figure 1); by virtue of this rotational movement, with the two shelf parts 10, 11 acting as a pivot, the members 24 are urged outwards to increase their contact with the compartment walls. By virtue of this configuration, a small vertical force F is sufficient to create a strong lateral thrust L.
[0020] When the configuration of the shelf 1 reaches complete planarity, the lateral force created between this shelf and the walls 2A and 2B of the refrigerator compartment 2 is such as to create sufficient friction to support the weight of the foods positioned on the shelf.
[0021] Rotation is blocked at this point by cooperation between the edges 13 and 14 of the parts 10, 11 of the shelf 1, to make the shelf configuration stable.
[0022] To remove the shelf 1 from the interior of the refrigerator compartment 2, the hinge elements have to be released and a vertical force applied along the edges 13 and 14 of the shelf parts 10, 11 in the opposite direction to that for insertion.
[0023] Figure 7, in which parts corresponding to those already described are indicated by the same reference numerals, shows a variant of the invention. In this, the shelf 1 comprises a monopiece 100 defining most (if not all) of the support surface 8 of the shelf; this part 100 is coupled via its edges and hinges (for example similar to those comprising the aforedescribed hinge elements 15 and 17) 101 to end parts 102 carrying the coupling and fixing members 24. These parts 102 with the members 24 define the sides 22 and 23 of the shelf 1.
[0024] In the case under examination, the shelf 1 is inserted into the cavity 2 by rotating the parts 102 about the hinges 101, then when the shelf is in the required position these parts are again rotated to bring them coplanar with the part 100 of the shelf 1. By acting in this manner the members 24 come into contact with the walls 2A and 2B of the cavity 2 to lock the shelf 1 in the required position, in the already described manner.
[0025] A further embodiment of the invention is described with reference to Figures 8A, 8B, 8C, 8D, in which parts corresponding to those already described are indicated by the same reference numerals, show a variant of the invention. The shelf 1 consists of two side portions 90 and 91 which can slide in guided manner within a central body 92.
[0026] At their ends 22, 23 the two slidable side portions 90 and 91 comprise the coupling and fixing members 24, formed as described in the preceding embodiments. These slidable portions 91, 92 also include seats 95, 96 for members for their coupling to the central body 92.
[0027] The central body 92 includes a locking mechanism 80 for the shelf 1, composed of two levers 97, 98 connected to two shafts 97A, 98A pivoted to the central body 92 in any known manner, such as to be able to rotate about an axis 97B, 98B, by manually rotating the levers 97, 98.
[0028] As a result of these rotations, a surface portion S1, S2 of the shafts 97A, 98A comes into contact with the seats 95, 96 of the slidable parts 91, 92, to cause said parts to undergo a lateral thrust movement H.
[0029] Each of the shafts 97A, 98A has a geometry such as to create at least two positions for the shelf locking mechanism 80: a first or rest position shown in Figure 8B, 8C, and a second or working position shown in Figures 8A and 8D.
[0030] When the levers 97 and 98 are in their rest position, no compression is exerted on the seats 95, 96 of the slidable parts 90 and 91 by the surfaces S1, S2 of the shafts 97A, 98A. The two half-shelves are free to slide mutually within the body 92, to enable the shelf 1 to be inserted into the cavity 2 and be then positioned for mounting, with the possible aid of the already described positioning members 30.
[0031] When the shelf 1 has assumed its working position, by rotating the levers 97, 98 the shaft 97A, 98A rotates to laterally move the half-shelf 90, 91, in the already described manner, in the direction such that it diverges from the central body relative to its first position, to cause the structure to assume a rigid configuration with flat geometry, at least on its upper surface. By virtue of said lateral movement, when the shelf has been inserted into the cavity a thrust L is exerted to deform the coupling and fixing members 24, to fix the shelf 1 to the walls 2A and 2B of the cavity 2 of the cabinet 3 in the manner describe in the preceding embodiments. Once the shelf 1 has been configured in its working position, by manually rotating the levers 97, 98 when in this position the two slidable half-shelves 90, 91 remain permanently locked in this position until said levers are manually returned into their rest position to exert a release force, opposing L.
[0032] A certain force has to be applied to the levers 97 and 98 to pass from the rest position to the working position. This force is necessary to overcome the opposing force exerted by the elements S1 and S2, which deform on coupling to the seats 95, 96 during passage from their first to their second position, and during the reverse passage.
[0033] The locking device 80 with levers 97 and 98 enables a relatively low force to be applied by the operator for their manual operation, while enabling a lateral force to be generated which is sufficient for self-supporting the shelf 1. At their ends the two lateral portions 90 and 91 comprise T-shaped positioning members 90 which facilitate shelf alignment and prevent it from locking in the working position if the shelf is misaligned, as described for the preceding embodiments.
[0034] The shelf 1 is mounted by inserting it in the cavity 2 while in its rest position and aligned with the walls in the same manner as the preceding embodiments. The shelf is then fixed to the walls by moving the levers 97, 98 of the locking mechanism 80 into their working position as described. The shelf is released by releasing the mechanism M by the reverse operation to that described.
[0035] Various embodiments of the invention have been described. Others can however be deduced therefrom. For example, at least one stop member (for example a peg) can be provided for insertion into one of a plurality of close-together seats each positioned in one of the portions 10, 11 of the shelf 1, to lock the shelf 1 in its position of use. In a further variant shown in Figures 9A and 9B, one (11) of the two hinged parts 10, 11 could include a support plate 1000 (Figure 9) which becomes superposed on the adjacent part 10 when the shelf 1 is in its working position (Figure 9B), to prevent the shelf being able to close by folding below the support level.
[0036] Another variant, not shown, comprises the combined use of coupling and fixing members 24 of high friction coefficient with sucker elements. These variants are also to be considered as falling within the scope of the ensuing claims.
1. A shelf for a cabinet (3), comprising a body (7) to be disposed in at least one cavity
(2) of said cabinet (3), in this latter the body (7) being positioned transversely
to present a flat surface (8) intended to support products, the body (7) presenting
opposing sides (22, 23) to be positioned facing corresponding side walls (2A and 2B)
of said cavity (2), characterised in that the body (7) of the shelf (1) comprises at least two parts (10, 11; 100, 102; 90,
91, 92) lockable in a working position in which said body is substantially flat and
its opposing sides (22, 23) cooperate with the side walls (2A and 2B) of the cavity
(2), said sides (22, 23) carrying coupling means (24) to be positioned on said walls
(2A and 2B) when said body (7) is in said working position so as to fix it to said
walls and enable the shelf (1) to be self-supporting in said cavity (2) in a substantially
flat position.
2. A shelf as claimed in claim 1, characterised in that said cavity (2) is the cavity of a refrigerator (4).
3. A shelf as claimed in claim 1, characterised in that said shelf (1) can be positioned at any level of the cavity (2) within the cabinet
(3).
4. A shelf as claimed in claim 1, characterised by comprising a positioning member (30) for said shelf (1), for its substantially flat
positioning within the cavity (2).
5. A shelf as claimed in claim 1, characterised in that the two parts (10, 11) are hinged, to each define a portion of the flat surface (8)
intended to support the products or foods to be preserved, said parts each carrying
the means (24) for coupling the shelf to the walls (2A and 2B) of the cavity (2) of
the cabinet (3).
6. A shelf as claimed in claims 1 and 2, characterised by comprising three hinged parts, a first part (100) defining substantially at least
most of the flat surface (8) to support the products or foods to be preserved, a second
part and a third part (102) being hinged to the free edges of said first part (100)
and carrying the means for coupling the shelf (1) to the walls (2A and 2B) of the
refrigerator cavity (2).
7. A shelf as claimed in claim 1, characterised in that the hinged-together parts (10, 11; 100, 102) present corresponding hinge elements
(15, 17) formed such that the adjacent edges (13, 14) of said parts (10, 11; 100,
102) become coupled together when the shelf (1) is in its working position, in which
its body (7) is flat.
8. A shelf as claimed in claim 6, characterised in that the hinge elements (15, 17) are positioned along that surface of the shelf (1) opposite
the surface (8) which supports the products or foods to be preserved.
9. A shelf as claimed in claim 6, characterised in that a first hinge element (15) defines a substantially circular seat (20) for a substantially
circular part (16) of the second hinge element (17).
10. A shelf as claimed in claim 1, characterised in that the coupling means are a member (24) of high friction coefficient fixed to the sides
(22, 23) of the shelf (1).
11. A shelf as claimed in claim 10, characterised in that the member (24) of high friction coefficient is of elastomeric material.
12. A shelf as claimed in claim 10, characterised in that the member (24) of high friction coefficient presents suckers to cooperate with the
corresponding wall (2A and 2B) of the refrigerator compartment.
13. A shelf as claimed in claim 10, characterised in that the member (24) of high friction coefficient presents a part (28) arranged to cooperate
with the corresponding wall (2A and 2B) of the cavity (2), said part (28) being flat
at least at the moment of this cooperation.
14. A shelf as claimed in claim 10, characterised in that the member (24) of high friction coefficient is mechanically fixed to the corresponding
side (22, 23) of the shelf (1).
15. A shelf as claimed in claim 10, characterised in that the member (24) of high friction coefficient is moulded onto the corresponding side
(22, 23) of the shelf (1).
16. A shelf as claimed in claim 10, characterised in that the member (24) of high friction coefficient is co-injection moulded with the respective
side (22, 23) of the shelf (1).
17. A shelf as claimed in claim 1, characterised by comprising a stop member inserted into one of a plurality of close-together seats
each positioned in one of the portions (10, 11; 100, 102) of the shelf (1), to lock
the shelf (1) in its position of use.
18. A shelf as claimed in claim 1, characterised by comprising a stop member operated by a lever mechanism (97, 98) and arranged to lock
the shelf (1) in its position of use.
19. A refrigerator comprising a cabinet (3) in which at least one cavity (2) is provided
to contain foods or products to be preserved, said cavity presenting opposing side
walls (2A and 2B) intended to cooperate with at least one shelf (1) supporting said
foods or products, said at least one shelf presenting the characteristics of claim
1, characterised in that said side walls (2A and 2B) of the refrigerator cavity (4) are not provided with
support members for said at least one shelf, this latter being self-supporting within
said cavity (2).