The disclosure relates to a pullout guide for an item of furniture or a domestic appliance having a stationary guide element and at least one slide rail, wherein a roller body cage having a plurality of roller bodies is arranged between the guide element and the slide rail. The disclosure furthermore relates to an item of furniture or domestic appliance which has such a pullout guide, and an add-on kit for an item of furniture or household appliance, to retroactively equip this item of furniture or domestic appliance with such a pullout guide.
Pullout guides for items of furniture or domestic appliances typically have a guide rail as a stationary guide element, on or in which a slide rail is guided so it is movable, mounted by roller bodies, which are arranged in a roller body cage. Profiles made of profiled sheet-metal have established themselves as guide rails or slide rails in this case. In this case, multiple slide rails, which are in turn guided in relation to one another, can be provided, to achieve a greater displacement distance of the pullout guide (so-called full pullouts). For example, three-part pullout guides having two slide rails are known, of which the slide rail guided directly on the stationary guide rail is also referred to as the middle rail.
Such pullout guides are also used, in a temperature-resistant embodiment, in domestic appliances, for example, baking ovens, to be able to conveniently pull cooked material carriers out of the cooking chamber of the cooking appliance. A pullout guide suitable for this purpose is known, for example, from document DE 10 2004 061 889 A1. The stationary guide rail is provided in this case with holding angles, which can be fastened on inner side walls of the cooking chamber of a cooking appliance, for example, via screws. However, the mounting of the pullout guide is complex and requires special fastening capabilities inside the cooking chamber.
Side rails are typically fixed in cooking chambers, for example, of baking ovens, on the inner side walls thereof, which are welded from rod-type wire material and provide the insertion capabilities for cooked material carriers.
So as not to have to provide additional mounting capabilities for pullout guides in addition to the fastening for such side rails, fastening pullout guides on the side rails is known. Document DE 20 2008 010 188 U1 discloses a pullout guide, in which a stationary guide rail is provided with quick fastening elements, which can be fixed in a clamping or latching manner on sections of the side rail, for example. A similar pullout guide is known from document WO 2011/147805 A1, in which a stationary guide rail is implemented as a hollow profile, which is pushed at least sectionally over a horizontal rod of the side rail. In this manner, the side rail stabilizes the guide rail, whereby it can be produced from particularly thin-walled material. The guide rail can be fixed in a clamping or latching manner on the rod of the side rail and optionally fixed by additional holding elements on the rod. The reduced material use in the guide rail is advantageous with regard to the production costs. A lesser material usage in the guide rail is also desirable from an energetic aspect, since the power consumption of the cooking appliance is reduced if less mass has to be heated to the operating temperature.
Furthermore, so-called wire roller bearings are known, for example, from document DE 34 36 406 A1. These are used for guiding a carriage along an arbitrary curved path. The path is predefined in this case by an appropriately formed wire bed, into which wires are inserted, which are used as running wires for roller bodies arranged in the carriage. Such a guide is not suitable as a pullout guide, on the one hand, and is very material intensive because of the wire bed, on the other hand.
The present disclosure is directed to a pullout guide with low material usage, which can be used in items of furniture or domestic appliance, in particular cooking appliances. The pullout guide is to be able to be added in a simple manner, in particular in cooking appliances which have the typical side rails. The present disclosure is also directed to an add-on kit, with which an item of furniture or domestic appliance can be supplemented with a pullout guide in a simple manner by a user and as much as possible without tools.
A pullout guide according to the disclosure of the type mentioned at the outset is a guide element is formed by at least one wire. In this manner, a pullout guide having a cost-effective and easily producible guide element may be implemented. Such a pullout guide can additionally be added easily to a domestic appliance or an item of furniture. This applies in particular to cooking appliances, since these typically already provide a wire suitable as a guide element as part of its side rail as a standard feature.
Domestic appliances in the meaning of this document are, for example, baking ovens, stoves, refrigerators and/or freezers, dishwashers, steam cooking devices, microwave ovens, washing machines, laundry dryers, food warmers, or grilling devices.
The term furniture also comprises, for example, apparatuses for laboratories, workshops, production plants, shops, vehicles, motor homes, travel trailers, ships, or yachts.
The guide element implemented as a wire can have any geometry which can be created by processes in nearly endless longitudinal extension. The wire can also be embodied as hollow in the meaning of a pipe or a tube. The external design can be described by a polygon. All oval or round shapes are also to be comprised.
Drawers, containers for refrigerated material, tabular pullouts, cooked material carriers such as baking sheets, grills, or dripping pans are mentioned as examples of pullout elements which are displaceably mounted using the guide system according to the disclosure.
In one embodiment of the pullout guide, the wire has a bent-over end section on at least one end. The bent-over end section represents a suitable fastening means, using with which the wire and, therefore, the pullout guide can be fixed on the item of furniture or appliance.
In a further embodiment of the pullout guide, the wire has, at least in a section in which it is in contact with the roller bodies, a continuously identical profile, in particular having a round, elliptical, rectangular, in particular square or diamond-shaped, or oval cross section. The continuously identical profile is advantageous for the implementation of runways for the roller bodies. Wires are available as semifinished products, for example, in the mentioned cross sections. They can thus be used as guide elements without further shaping method steps.
In a further embodiment of the pullout guide, the wire is self-supporting. This further minimizes the material usage.
In a further embodiment of the pullout guide, the slide rail has a C-shaped profile having a slotted opening. The bent-over end sections of the wire may lead through the slotted opening of the slide rail, whereby twisting of the slide rail around the wire is restricted. In this manner, the pullout guide can absorb a torque even in the case of a round cross section of the wire, without twisting around the axis of the pullout direction occurring.
In a further embodiment of the pullout guide, the slide rail has openings or outwardly embossed spherical caps, into which at least some of the roller bodies can be pressed, to be able to lead the bent-over end sections of the wire or the wire between at least two opposing roller bodies. Roller body pockets may be provided in the roller body cage in this case, in which the roller bodies are held in two different positions. Thus, parking positions for the roller bodies are provided, into which the roller bodies can be moved to be able to push the slide rail having inserted roller body cage onto the wire for mounting.
In a further embodiment of the pullout guide, auxiliary roller bodies, which are spaced apart from the roller bodies, and which press with their running surface against the wire and which can be moved out beyond the at least one bent-over end section of the wire, are provided in the roller body cage in a top front region and/or in a bottom rear region. The auxiliary roller bodies can absorb weight forces applied by a load, for example, a cooked material carrier on the slide rails and thus minimize tipping over of the front end of the slide rail. In addition, they do not restrict the pullout distance, since in contrast to the roller bodies they can be moved out beyond the bent-over end section of the wire.
Roller bodies and auxiliary roller bodies can be formed by various geometric shapes, for example, they can have a cylindrical design, a bulbous design, or a spherical design. They can also be embodied as rolls having a mounting. Suitable axles for the mounting are also conceivable.
In a further embodiment of the pullout guide, a rider which is fixable on the wire is provided, which is used as a stop for the roller body cage. The rider may be implemented as a corner stop, which is fixable at the transition to the bent-over end section. The roller bodies can thus be prevented from running off the bent-over end section, which can be linked to self-locking of the pullout guide by locking roller bodies.
In a further embodiment of the pullout guide, it is implemented as a full pullout or overextension pullout and has a further slide rail, which is mounted so it is movable on the slide rail via further roller bodies. A greater travel distance is thus achieved.
In a further embodiment of the pullout guide, two parallel and spaced-apart wires can advantageously be used as the guide element, whereby a higher carrying capacity of the pullout guide can be achieved. For example, the roller body cage is then implemented in two parts having an outer roller body cage and an inner roller body cage, wherein the inner roller body cage carries inner roller bodies which run between the two parallel and spaced-apart wires. The two parallel adjacent wires are prevented from being pressed together by the inner roller body cage, whereby the carrying capacity of the pullout guide is further increased.
If two wires lying in parallel are used as the guide element, in particular a one-piece embodiment of the ball cage is conceivable. The wires are located oriented in relation to one another so that they come into contact or nearly come into contact in the region of their longitudinal extension.
In addition to latching, further joining methods are also conceivable for the two roller body segments, they can be fixed on one another in an integrally-joined, formfitting, or friction-locked manner.
In a further embodiment of the pullout guide, the wire is part of a side rail of a cooking appliance. A pullout guide can thus be implemented in a cooking appliance, in which wire present in any case is used as a guide element. The solution is particularly cost-effective and material-saving.
In a further embodiment of the pullout guide, the wire having its bent-over end sections is implemented so that it is fixable in boreholes which are introduced into a furniture body. The bent-over end sections preferably have a spacing from one another in this case which corresponds to a spacing of rows of holes in the furniture body. Using a U-shaped bent wire implemented in a matching manner, a pullout guide is thus provided which is producible cost-effectively and in a material-saving manner and which can be inserted in an extremely simple manner into such items of furniture which are provided with rows of holes, for example, for receiving shelf boards, drawers, etc.
A household appliance, an item of furniture, and an add-on kit may include such a pullout guide.
a and b show a first embodiment of a pullout guide inserted into a baking oven;
a, b, c and 3a, b, c show various detail views of the pullout guide of the first embodiment;
a, b show a further alternative embodiment of the pullout guide of the first embodiment in various views;
a, b, c and 7a, b, c show a second embodiment of a pullout guide in various views;
a, b show an alternative embodiment of the pullout guide of the first or second embodiment in various views;
a, b show a third embodiment of a pullout guide in various views;
a, b and 11a, b show a fourth embodiment of a pullout guide inserted into a baking oven;
a, b, c show various views of the roller body cage from
a, b, c show various views of an alternative embodiment of a roller body cage of the fourth embodiment of a pullout guide;
a, b show a fifth embodiment of a pullout guide inserted into a baking oven;
a, b show a sixth embodiment of a pullout guide inserted into a baking oven;
a, b, c show a ninth embodiment of a pullout guide inserted into a baking oven;
a to d show an outer cage of a roller body cage of the ninth embodiment in various views;
a to d show an inner cage of a roller body cage of the ninth embodiment in various views; and
a, b, c show a tenth embodiment of a pullout guide inserted into a furniture body.
a and 1b show a baking oven 1 having open door 2 in a perspective schematic view, which gives a view into a cooking chamber 3 of the baking oven 1. The baking oven 1 is selected as an example of a household appliance. The pullout guide according to the disclosure described hereafter can also be used in another household appliance, for example, a steam cooker or a microwave oven.
A side rail 10 is attached to side walls of the baking oven 1 in the cooking chamber 3. The side rail 10 has two vertically arranged pillars 13, which are connected to one another via horizontally aligned wires 11. According to the disclosure, the wires 11 are used as guide elements for the pullout guide. The wires 11 have bent-over end sections 12 on their ends, which are typically connected via a welded bond to the pillars 13. Wire in a thickness between 4 mm and 8 mm is typically used as the material of the side rail 10. In this embodiment, cooked material carriers, for example, baking sheets, may be laid directly on the horizontally extending wires 11. As is visible in the upper region of the cooking chamber 3 in
In the first embodiment shown in
In
a shows the pullout guide of the first embodiment in a perspective exploded view. The side rail 10 is shown here without the baking oven 1, to enable a perspective view from the rear side of the side rail 10, i.e., from the sides facing toward the inner wall of the cooking chamber 3. It is apparent from the illustration that the slide rail 20 is implemented as a C-shaped profile hollow rail, produced from profiled sheet-metal material, for example.
A roller body cage 30, which is shown in an enlargement in
In
c shows the pullout guide in an assembled state in a sectional view. It is recognizable in the sectional view that adjacent roller bodies 32, which press against the guide element, on the one hand, and against the slide rail 20, on the other hand, have a free spacing X from one another between their surfaces, which is less than the diameter Y of the wire 11 because of the geometry. Therefore, the slide rail 20 having inserted roller body cage 30 cannot readily be pushed onto the wire 11—the space between the two roller bodies 32 is not sufficient to push the roller body cage over the bent-over end sections 12 of the wire 11.
To nonetheless enable the slide rail 20, into which the roller body cage 30 is inserted, to be put on, the slide rail 20 has openings 23 in this embodiment, which are arranged in the region of the front end of the slide rail 20 and which are positioned so that the eight roller bodies 32 facing toward the inner wall of the baking oven 1 are at least partially movable into these openings 23. This degree of freedom of the roller bodies 32 enables the roller bodies 32 to be moved away from one another in pairs, in the case of a position of the roller body cage 30 in the region of the openings 23, that the slide rail 20 having the roller body cage 30 can be guided over the front bent-over end section 12 of the wire 11. The openings 23 can be implemented in this case so that the roller bodies 32 cannot pass completely through them. This can be achieved by a corresponding diameter of the openings 23 in relation to the diameter of the roller bodies 32. It is also possible to implement the openings 23 as conical having a diameter which enlarges toward the inside. In a further alternative embodiment, instead of openings 23, spherical caps 24 are implemented in the slide rail 20, for example, embossed, as shown in
In
A grip tab 34 is arranged on the roller body 32, which protrudes in the direction of the inner wall of the baking oven 1 out of the slide rail 20. After the slide rail 20 is put on, the roller body cage 30 can be pushed toward the rear end, i.e., in the direction of the contact pin 21, via this grip tab. In normal operation, the roller body cage 30 should be located between the middle and the rear end of the guide wire 11 when the slide rail 20 is retracted into the cooking chamber 3. When the slide rail 20 is pulled out, the roller body cage 30 then accordingly moves forward with the slide rail 20, wherein it only covers half of the running distance of the slide rail 20, however. During the usage of the slide rail 20, the roller body cage 30 as a result normally no longer reaches the region of the openings 23 or spherical caps 24. If this nonetheless occurs, for example, because of increased friction between the roller bodies 32 and the wire 11, for example, caused by soiling of the wire 11, during a next pullout operation of the slide rail 20, the correct positioning of the roller body cage 30 in relation to the slide rail 20 is established again, since the roller body cage 30 cannot move further than up to the front end of the wire 11 and the slide rail 20 is then moved into the extended position while sliding over the roller bodies 32. During the next pushing-in operation, the correct positioning of roller body cage 30 and slide rail 20 in relation to one another has resulted again.
In the illustrated embodiment, a movement of the roller body cage 30 beyond the front end of the wire 11 is limited in that the roller bodies 32 facing toward the front and the inner wall of the cooking chamber 3 run against the bent-over end sections 12 of the wire 11. In this case, depending on the friction properties of the roller bodies 32 on the wire 11 and the slide rail 20, self-locking of the movement of the slide rail 20 can occur under certain circumstances. To prevent this, a rider can be fixed on the wire 11, against which the roller body cage 30 stops. Such a rider is shown in the top view in
In the embodiments without corner stop 40, the profile of the slide rail 20 comes into contact on at least one bent-over end section 12 in the event of tilting/rotation about the longitudinal axis. In this case, the bent-over end section 20 is used as a tilt protection or twist lock for the slide rail 20. It is also conceivable to connect the contact pins 21 of the left and right pullout guides via a synchronization rod and thus provide a twist lock for both pullout guides.
In contrast to the first embodiment, in the second embodiment case no openings 23 or spherical caps 24 are implemented in the slide rail 20, into which at least some of the roller bodies 32 plunge in a “park position”, to put the slide rail 20 having inserted roller body cage 30 onto the wire 11. Rather, notwithstanding this, firstly the roller body 30 is clipped onto the wire 11. For this purpose, the roller body cage 30 is manufactured from an elastic material, so that its C-shaped profile can accordingly bend open wide.
a shows the individual components of the pullout guide in the unassembled state,
After the roller body cage 30 is put on the wire 11, the slide rail 20, with removed stopper 22, is pushed over the roller body cage 30 along the direction of the wire 11. The slide rail 20 can then be closed again at the end using the stopper 22.
Twisting of the roller body 30 in the slide rail 20 is already prevented by the geometry of the slide rail 20. As also in the first embodiment, it has a C-shaped profile, which is essentially based on a square basic shape having rounded corners. The rounded corners form the runway for the roller bodies 32 of the roller body cage 30. In addition, the roller body cage 30 is reinforced with a projection 35 on the rear side, i.e., opposite to the opening. This projection 35 is implemented so that it moves in the slotted opening of the slide rail 20 and thus additionally prevents twisting of the roller body cage 30 within the slide rail 20.
An alternative embodiment of the front stop for the cooked material carrier is shown in
As in the embodiment shown in
The roller body cage 30 of the fourth embodiment is implemented similarly to the roller body cage 30 of the first embodiment in a middle region. As is apparent in the detail enlargements in
When the corresponding auxiliary roller body 37 is located in the region of the wire 11 of the side rail 10, the auxiliary roller body 37 presses against this wire from above or below. In contrast to the roller bodies 32, however, the auxiliary roller body 37 can move out beyond the bent-over end section 12 of the side rail. This is shown, for example, in the perspective illustration in
In the same manner as in
In contrast to the previously shown embodiments, in this embodiment two adjacent wires 11 are used as the guide element. Furthermore, the pullout guide is implemented as a so-called full pullout, having three elements or rails which move in relation to one another. For this purpose, a further slide rail 50 is provided, which is mounted so it is movable on the slide rail 20, which in turn—as usual—moves on the stationary guide element, i.e., the wires 11 of the side rail 10, mounted via roller bodies 32 of the roller body cage 30. The cooked material carrier is accordingly laid on the further slide rail 50. For this purpose, contact pins 51 are provided in the front and rear regions, the function of which is similar to the contact pins 21 or 25 or the stopper 22 of the first embodiment.
It is apparent in the sectional view of
A further embodiment of a full pullout or overextension pullout having a slide rail 20 and a further slide rail 50 is indicated in
Two further embodiments of a pullout guide are indicated in
A further such embodiment of a pullout guide implemented as a single pullout, in which two adjacent wires 11 of the side rail 10 are used for the guide, is shown in
In the present embodiment, the roller body cage 30 is embodied in two parts, having an outer roller body cage 30a and an inner roller body cage 30i.
In the overview illustration of
As the frontal view of
The pullout guide is mounted by snapping the unit made of the slide rail 20 and the roller body cage 30a onto the wires extending in parallel of the side rail 10. In this case, the elasticity of the wires 11 extending in parallel is utilized. Due to the short-term yielding of the wires 11, the roller body cage 30a can enclose the two wires. The unit made of slide rail 20, roller body cage 30a, and roller bodies 32a is put onto the wires 11 transversely to the pullout direction of the pullout guide to be installed. The unit made of slide rail 20 and roller body cage 30a already contains the roller bodies 32a. The inner ball cage 30i is thus inserted from the inner side of the baking oven rail 10 and latched with the outer roller body cage 30a by latching means 38. The roller body cage 30 thus put onto the side rail 10 and joined together is shown once again in detail in a perspective view in
Details of the outer roller body cage 30a are shown once again in
A pullout guide according to the disclosure for use in a furniture body 4 is shown in three partial images in
a shows an example of three pullout guides according to the disclosure inserted into the furniture body 4, of which slide rails 20 are visible in this illustration. The pullout guides are shown in a pulled-out state in
The guide elements are U-shaped curved brackets made of wire 7, which are inserted into the holes of the rows of holes 6. This is shown in detail in an enlarged illustration of the furniture body 4 in
It is to be noted that the full pullouts or overextension pullouts shown above in the embodiments of
All illustrated variants of the guide system according to the disclosure are also removable again and mountable again, for example, in another plane. Mounting or removal of the guide system is reversible.
Number | Date | Country | Kind |
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10 2012 108 068.2 | Aug 2012 | DE | national |
10 2013 102 846.2 | Mar 2013 | DE | national |
This application is a U.S. nationalization under 35 U.S.C. §371 of International Application No. PCT/EP2013/067189, filed Aug. 16, 2013, which claims priority to German Application No. 10 2012 108068.2, filed Aug. 30, 2012, and German Application No. 10 2013 102846.2, filed Mar. 20, 2013. The disclosures set forth in the foregoing applications are incorporated herein by reference in their entireties.
Filing Document | Filing Date | Country | Kind |
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PCT/EP2013/067189 | 8/16/2013 | WO | 00 |