Abstract:
A shelf for refrigerating appliances, in particular a bottle shelf for a bottle-storage cabinet, has a frame, formed by transverse and longitudinal struts, and a plurality of trays which are retained one beside the other between two transverse struts of the frame and are intended for accommodating in each case one bottle. At least one of the transverse struts, over at least part of its cross section, is formed by an extruded profile made of a material that has a higher modulus of elasticity than the material of the longitudinal struts.

Description:
BACKGROUND OF THE INVENTION 
   Field of the Invention 
   The present invention relates to a shelf for a refrigerating appliance, in particular a bottle shelf for a bottle-storing cooler cabinet for the temperature-controlled storage of bottles, in particular of wine bottles. 
   Such a bottle-storing cabinet generally contains a heat-insulating housing, a refrigerating installation for cooling a storage chamber in the interior of the housing, and, in the storage chamber, a plurality of shelves for accommodating bottles. Such a shelf contains a plurality of trays, which are each shaped in order to accommodate a bottle lying on its side, and a frame, on which the trays are retained one beside the other. 
   In the case of conventional refrigerators or cooler cabinets, it is common practice, inter alia, for refrigerated-item shelves which are to be installed in the storage chamber of such a refrigerator or cooler cabinet to be produced from a load-bearing glass panel which has its borders encapsulated in a plastic frame. When such a shelf has been installed in the refrigerating appliance, it is the frame that is in contact with the inner wall of the storage chamber and is fastened thereon; the glass panel itself is not in direct contact with the inner wall and is only supported via the frame. This method allows cost-effective production of the shelves, but cannot be used for a bottle shelf with a plurality of trays located one beside the other since, in the case of such a bottle shelf, bending loading from the weight of the shelf itself and from bottles mounted thereon can only be absorbed by crosspieces of the frame which connect the trays to one another. If these were to be produced, in a known manner, from injection-molded plastic, then it would be necessary either to accept pronounced bowing of the crosspieces, which is undesirable since such crosspieces are not reliably suspended on the side walls of the storage chamber and there is a risk of an overloaded shelf breaking out of its suspension device and crashing down, or to render the crosspieces so thick that they take up a not inconsiderable amount of the height of the interior and thus reduce the useable volume of the latter, which is likewise undesirable. The problem described above in the case of a bottle shelf made of injection-molded plastic also similarly arises in the case of refrigerated item shelves produced from injection-molded plastic. 
   It would, of course, be possible to produce the frame from a material with a modulus of elasticity which is higher than that of the plastics which are normally used for the frames of refrigerating-appliance shelves, in particular from metal, but this would increase the production costs to a considerable extent since such a metal would have to be die-cast in order to produce a single-piece frame or, for use in a multi-part frame, additional steps for joining the individual frame parts together would be necessary. 
   SUMMARY OF THE INVENTION 
   It is accordingly an object of the invention to provide a shelf for a refrigerating appliance that overcomes the above-mentioned disadvantages of the prior art devices of this general type, which is cost-effective to realize and, at the same time, can be subjected to high loading. 
   With the foregoing and other objects in view there is provided, in accordance with the invention, a shelf for a refrigerating appliance. The shelf contains a frame having transverse struts and longitudinal struts made of a first material. At least one of the transverse struts, over at least part of its cross section, is formed by an extruded profile made of a second material having a modulus of elasticity higher than that of the first material of the longitudinal struts. A set-down surface is provided and supported by the frame. 
   The object is achieved according to the invention in that, of the transverse struts of the frame of a shelf, at least one, over at least part of its cross section, is formed by an extruded profile made of a material which has a modulus of elasticity which is higher than that of the material which is used at least for the longitudinal struts of the frame. As a result, a refrigerated-item shelf which is produced from injection-molded plastic and is intended for use in a refrigerating compartment of a refrigerator or cooler cabinet is provided with very high load-bearing strength. 
   The material may be, in particular, aluminum or steel. In addition to the extruded profile, the transverse struts preferably also have crosspieces, which bear or accommodate the extruded profile and, connected integrally to the longitudinal struts, are formed from injection-molded plastic. 
   Such an extruded profile may be introduced, in particular, into a downwardly open groove of one of the crosspieces, with the result that the central region of such a crosspiece can rest, under bending loading, on the extruded profile. 
   In order, with low material outlay in respect of the extruded profile, to achieve a pronounced supporting action, the extruded profile should be higher than it is wide in cross section. It may have, for example, a cross section in the form of an upended rectangle. Since the fact that such a profile is included laterally in the groove of the crosspiece prevents the extruded profile from yielding laterally under bending loading, the loading capability of a strut which is made up of the extruded profile and the crosspiece enclosing the same laterally is considerably greater than the sum of the individual loading capabilities of the profile and of the crosspiece. 
   The extruded profile may also be disposed such that it covers over an outer side of one of the crosspieces. In particular if a metal such as aluminum or steel is used for the extruded profile, this provides the shelf as a whole with a high-quality appearance. 
   A U-shaped or C-shaped cross section of such an extruded profile makes it easier for the latter to be fastened on the crosspiece by plugging or clipping it on transversely to the longitudinal direction, or pushing it on in the longitudinal direction, of the profile. 
   It is preferable for at least one of the transverse struts to have a continuous bearing surface, on which trays for bearing bottles are supported at intervals from one another. In the interspaces between the trays, the bearing surfaces may be occupied in each case by spacer bodies, which ensure that the trays are placed at regular intervals without any need for measurement. Such spacer bodies may be supplied in different widths in order to provide, in modular fashion, bottle shelves which allow the space-saving storage of bottles with different diameters. 
   In one embodiment, the transverse struts have holes and the trays bear stubs engaging in the holes in the transverse struts. The transverse struts have crosspieces and the holes are preferably formed on an inner side of the crosspieces. 
   Other features which are considered as characteristic for the invention are set forth in the appended claims. 
   Although the invention is illustrated and described herein as embodied in a shelf for a refrigerating appliance, in particular a bottle shelf for a bottle-storing cooler cabinet, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims. 
   The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a diagrammatic, perspective view of a bottle shelf according to the invention; 
       FIG. 2  is a broken, longitudinal sectional view through a first configuration of the bottle shelf; 
       FIG. 3  is a broken, longitudinal sectional view through a second configuration of the bottle shelf; and 
       FIG. 4  is a broken, longitudinal sectional view through a third configuration of the bottle shelf. 
   

   DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Referring now to the figures of the drawing in detail and first, particularly, to  FIG. 1  thereof, there is shown a bottle shelf that is made up of a four-sided frame  1  with longitudinal struts  2  and transverse struts  3 ,  6 . When installed in a bottle-storing cabinet, the longitudinal struts  2  extend along the side walls of a storage chamber of the cabinet. A cylindrical stub  4  and a horizontally elongate rib  7  are provided in order to engage in guiding cut-outs in the side wall and thus to support the shelf. 
   The transverse struts  3 ,  6  each extend along a rear wall or a door of the storage cabinet. As can better be seen in the section of  FIG. 2 , the transverse struts  3 ,  6  each have a two-part construction with a crosspiece  7 ,  8 , which is injection molded integrally to the longitudinal struts from plastic, and an extruded profile  9 ,  10 , which is made of metal, in particular of aluminum or stainless steel, and reinforces the respective crosspiece  7 ,  8 . 
   In the case of the transverse strut  6  which is directed toward the rear wall of the storage cabinet, the extruded profile  10  has a cross section in the form of an upended rectangle and fills a downwardly open groove of the cross piece  8  in a form-fitting manner. The extruded profile  10  thus merely has a reinforcing function, and it is not normally visible to a user. 
   Instead of being introduced into a groove, it would be also be possible for the extruded profile  10  to be introduced into a bore extending over the length of the transverse strut  6 , but such a bore is more difficult to produce by injection molding than the groove that is shown in  FIG. 2 , and so the groove is the preferred variant. 
   In the case of the transverse strut  3  which is directed toward the door, the crosspiece  7 , which is integral with the longitudinal struts  2 , is located in the interior and is enclosed on three sides by the C-shaped extruded profile  9 , this causing the crosspiece  7  to be virtually completely hidden from a view of the user. The extruded profile  9  can be displaced in the longitudinal direction of the crosspiece  7  and can thus be plugged onto the longitudinal strut  2 , or removed therefrom, when the strut  2  is not installed in the storage cabinet. An extruded profile with a U-shaped cross section could also be plugged onto the crosspiece  7  and removed therefrom, in the longitudinal direction of the longitudinal struts  2 . It would also be conceivable for the crosspiece  7  to be provided with a partly flexible cross section with pliable lugs which, when a C-shaped profile is plugged on, first yields in the longitudinal direction of the longitudinal struts  2  and, as soon as the profile has reached its end position, engage behind the inwardly directed end sections of the profile and prevent withdrawal in the opposite direction. 
   Bearing surfaces  11  are integrally formed on the mutually facing inner sides of the crosspieces  7 ,  8 , the bearing surfaces extending over the entire length of the crosspieces  7 ,  8  and, for reinforcing purposes, being terminated in each case by a bar  13  with a cross section in the form of an upended rectangle. Bottle trays  14  are supported on the bearing surfaces  11 . The bottle trays  14 , which are injection molded from plastic, are essentially in the form of a cylinder-wall segment which is reinforced along the longitudinal and transverse borders in each case by vertically downwardly directed walls  15 ,  16 . The walls  15 , which are integrally formed at the longitudinal ends of the tray  14 , each engage between a crosspiece  7 ,  8  and the bars  13 , integrally formed thereon, and are supported on the bearing surface  11  located therebetween. The presence of the bars  13  prevents the merely loosely positioned trays  14  from being able to slide off from the bearing surfaces  11 , and crash down, as a result of twisting or bowing when overloaded. 
   A plurality of flat ribs  17  which extend in the longitudinal direction on the top side of the tray  14  prevent large-surface-area contact between the tray  14  and a bottle which is lying thereon, with the result that it is not possible for condensation, which could result in a bottle label being damaged, to collect between the tray  14  and bottle on a permanent basis. 
   As  FIG. 1  shows, in interspaces between the trays  14 , the bearing surfaces  11  are concealed by spacer bodies  18 . The spacer bodies  18 , which may be formed, for example, of a rubber-like material, are each plugged in a force-fitting manner between the crosspiece  7  or  8  and the associated bar  13 . Of the spacer bodies  18 , a number of sets of different widths may be made available as an accessory to the shelf according to the invention, the widths thereof being adapted to those of the frame  1  in each case such that they allow different numbers of trays  14  to be placed at regular intervals in the frame  1 . 
     FIG. 3  shows a longitudinal section through a second configuration of the shelf according to the invention. The transverse struts  3 ,  6  of this configuration differ from those of  FIG. 2  by way of the configuration of the bearing surfaces  11 . These are not terminated by the bar  13  in the case of the configuration of  FIG. 3 ; instead, they are provided at regular intervals with holes  12  through which a screw  19  can be respectively inserted and tightened in a threaded bore  20  of a tray  14 . The trays  14  are thus not just positioned loosely, but fastened on the frame  1  on a permanent basis. 
   As a result of the position of the holes  12  in the bearing surfaces  11  and of the threaded bores  20  in the trays  14  in this configuration, the positions which can be taken up by the trays  14  on the frame are fixed and cannot be varied, with the result that it is also the case that it is not readily possible to vary the number of trays in a frame. A variant of the configuration allows the trays  14  to be placed at variable intervals by replacing the threaded bores  20  by grooves  20  which are oriented parallel to the transverse struts  3 ,  6  and of which the width is dimensioned in each case such that the screws  19  cut threads into the side flanks of the grooves  20 . Such a tray  14  can be fastened in any desired position along the bearing surface  11  in which the groove  20  ends up located over one of the holes  12  of the bearing surface  11 . Here too, the spacer bodies  18  are placed between the trays  14  on the bearing surfaces  11  in order to cover over holes  12  in the bearing surfaces where there is no tray  14  screw-connected. The spacer bodies  18  may simply be clamped in between the bottle trays  14  or, as is the case with the latter, they may be provided with a groove, which allows them to be screw-connected to the bearing surfaces  11 . 
   In the case of the configuration of  FIG. 4 , the top sides of the transverse struts  3 ,  6  themselves in each case serve as bearing surfaces for extensions  23  of the trays  14 . The trays  14  are fixed in the transverse direction by integrally formed stubs  21 , which each engage in blind holes  22  in the inner side of the crosspiece  7 , the inner side not being visible to an observer. The blind holes  22  may be disposed in the rear side in the form of a number of groups, the holes of one group being spaced apart from one another in each case by the same intervals, but the number of holes, and the intervals between them, differing from group to group, with the result that, depending on which group of holes is used, it is possible to install different numbers of trays at regular intervals. 
   The rear extension  23  is continued by a downwardly directed tongue  24  which, by way of a latching hook  25  integrally formed at its end, engages behind an edge of the rear transverse strut  6 . The trays  14  in this configuration are particularly straightforward to install, in that they are initially retained in a sloping position and, in the process, introduced into the blind holes  22  by way of their stubs  21  and then pivoted downward until they latch in at the rear transverse strut  6   
   The rear transverse strut  6  is formed by the crosspiece  8 , which is formed integrally with the longitudinal struts  2  from plastic, and a C-shaped extruded profile  10 , which is fitted over the crosspiece  8  from above. The crosspiece  8  has an approximately U-shaped cross section with two vertical legs  26 , which have latching edges  27  formed on their outer sides. When the extruded profile  10  is fitted over, the two legs  26  are initially pressed elastically toward one another. As soon as latching noses of the profile  10  have passed the edges  27 , the legs  26  spread apart again, with the result that the edges  27  engage behind the latching noses and anchor the profile  10  firmly on the crosspiece  8 . 
   In the case of those exemplary embodiments of the shelf according to the invention which are shown, the longitudinal struts  2  of the frame  1  are narrow and serve merely to provide a rigid connection between the transverse struts  3 ,  6 . As an alternative, it would also be possible to widen the longitudinal struts  2  so that they themselves form an accommodating tray for a bottle in each case.