EP3499132B1 - Heating device, in particular oven - Google Patents

Description

The basis of the present invention is a heating device, in particular an oven, with a housing enclosing a heatable interior, the interior being delimited at the rear by a rear wall and at the front by a door which, in a closed position, closes access to the interior of the housing opening, with the housing at least one item carrier for items to be heated, which can be removed from the housing after the door is opened, is accommodated with a guide device for guiding an item carrier in a housing, with at least two guide units which are each attached to the housing at a transverse distance from one another on the one hand and coupled to the item carrier on the other are and lead the Gutträger through a movement between a retracted operating position and an at least partially pulled out of the housing pull-out position, wherein a synchronization device for synchronizing the movement of the guide units at de r movement of the load carrier coupled to the guide units is present, with the guide units being attached to a rear wall of the housing by means of fastening means, and with the guide units each having a guide linkage consisting of a plurality of guide arms, which can be moved in the manner of an accordion and in doing so holds the load carrier between the operating and the extended position, the synchronization device having synchronization means via which the guide units are positively coupled to one another.

the EP 3 358 285 A1 discloses a device for attaching a carrier element for objects in a body, in particular Device for mounting a food support in an oven. At the back of the oven, two guide arms designed as toggle levers are articulated, which are pivotally connected at the end to a food support.

the EP 1 258 686 A1 discloses an oven with a carriage and a door which are loaded in a closed position with a closing force via a spring device. The spring device has a guide linkage consisting of several guide arms, which can be moved in the manner of an accordion. The guide arms are each designed as toggle levers, which are mounted on one side on a base plate and on the other side on a carriage joint. Between the two toggle levers, a tension spring is connected to the two toggle lever joints.

the U.S. 1,936,124 A discloses an oven with an oven door that is coupled to a food support via a linkage. The linkage consists of several guide arms connected to one another in an articulated manner, with the linkage having reached the rear wall of the oven on the one hand and the food support on the other hand. The food support is also mounted so that it can be moved linearly via guide rails located on the side wall. When the door is opened, the rods, which were initially folded together, are unfolded and the food support is pulled out of the oven with it.

the JP2005030717 discloses an oven with an oven flap, when it is opened, a food support is extended at the same time by a mechanism. The mechanism consists of two meshing gear wheels and a linkage made up of several guide arms, which is attached to the rear wall of the oven on the one hand and to the food support on the other.

It is known from the prior art, which is not available in printed form, to use guide devices for guiding a product carrier in a housing of a heating device, for example an oven. In a very conventional way, on the opposite side walls of the housing of a baking oven, there are slide-in strips which are used to hold an item carrier, for example in the form of a baking tray or grating. In order to remove the product carrier from the housing, it is necessary to grasp it by a front edge and to pull it out of the housing. Furthermore, guide devices are known which are fastened on the one hand to the housing and on the other hand are coupled to the goods carrier and guide the goods carrier through a displacement movement between the operating position and the extended position. However, with the conventional slide-in rails as well as with the guide device with the two guide units, it can happen that the product carrier tilts or jams on the side walls when it is pulled out.

The object of the invention is therefore to create a heating device of the type mentioned at the outset, with which a load carrier guided on a guide device is guided reliably and operationally between an operating position and a pulled-out position.

This object is solved by a heating device having the features of independent claim 1 . Further developments of the invention are presented in the dependent claims.

The heating device according to the invention is characterized in that the guide arms are designed as swivelingly connected swivel arms that can swivel about swivel axes on the body side and/or the load carrier side, with the synchronization means on the one hand on the load carrier side swivel arm of one guide unit and on the other hand on the swivel arm of the other guide unit on the goods carrier side, and wherein the synchronization means are designed as toothed segments which are arranged on the swivel arms of the guide units on the goods carrier side in such a way that they mesh with one another.

The guide units are attached to a rear wall of the housing by means of attachment means. An attachment is expediently provided in the middle area of the rear wall in both directions of the rear wall.

The guide units each have a guide linkage consisting of a plurality of guide arms, which can be moved in the manner of an accordion and thereby guides the load carrier between the operating and extended positions.

The guide arms are designed as pivoting arms which are pivotably connected to one another and can be pivoted about pivot axes on the carcass side and/or on the carrier side.

In a particularly preferred manner, the guide linkages each have two swivel arms, of which a first swivel arm is swivel-mounted about a first swivel axis on the housing side and a second swivel arm is swivel-mounted about a second swivel axis on the goods carrier side, and the two swivel arms are pivotally connected to one another via a third swivel axis. With such a configuration, the guide linkages can consequently each form a knee joint.

The synchronization device has synchronization means via which the guide units are positively coupled to one another. A movement of one guide unit is thus necessarily translated into a movement of the other guide unit transferred, so that the guide units are in synchronism during the movement between the operating and the pull-out position of the load carrier.

In a development of the invention, the guide units are coupled to the load carrier by means of coupling means at a coupling interface, with the synchronization means being arranged in the area of the coupling interface.

The synchronization means are arranged on the one hand on the goods-carrier-side swivel arm of one guide unit and on the other hand on the goods-carrier-side swivel arm of the other guide unit. When the guide arms are designed as pivot arms, these synchronization means are expediently arranged on the pivot axes on the goods carrier side.

According to the invention, the synchronization means are designed as toothed segments.

The toothed segments are arranged on the swivel arm on the goods carrier side in the guide unit in such a way that they are in meshing engagement with one another.

Figur 1

eine perspektivische Darstellung eines bevorzugten Ausführungsbeispiels der erfindungsgemäßen Erhitzungsvorrichtung mit Führungsvorrichtung (nicht dargestellt),

Figur 2

eine perspektivische Darstellung der Erhitzungsvorrichtung von Figur 1 ohne Gehäuse, bei der die Führungsvorrichtung gezeigt ist,

Figur 3

eine perspektivische Darstellung der Führungsvorrichtung,

Figur 4

eine Draufsicht auf die Führungsvorrichtung von Figur 1, wobei sich der Gutträger in der Betriebsposition befindet,

Figur 5

eine vergrößerte Darstellung der Einzelheit X aus Figur 4, bei der die Synchronisationseinrichtung deutlicher dargestellt ist,

Figur 6

eine Draufsicht auf die Führungsvorrichtung von Figur 3, wobei sich der Gutträger in der herausgezogenen Herausziehposition befindet und

Figur 7

eine vergrößerte Darstellung der Einzelheit Y aus Figur 6, wobei die Synchronisationseinrichtung deutlicher gezeigt ist.

In a particularly preferred manner, the coupling means for coupling the guide unit to the load carrier are designed as a bulkhead which is movably mounted by means of the guide units between an operating position located in the area of the rear wall and a closed position in the area of a housing opening of the housing. A preferred embodiment of the invention is shown in the drawing and is explained in more detail below. Show in the drawing:

figure 1

a perspective view of a preferred embodiment of the heating device according to the invention with a guide device (not shown),

figure 2

a perspective view of the heating device of FIG figure 1 without housing, where the guiding device is shown,

figure 3

a perspective view of the guide device,

figure 4

a plan view of the guide device of Figure 1, wherein the load carrier is in the operating position,

figure 5

an enlarged representation of the detail X figure 4 , where the synchronization device is shown more clearly,

figure 6

a plan view of the guide device of Figure 3, wherein the Gutträger is in the pulled-out position and

figure 7

an enlarged view of detail Y figure 6 , where the synchronizer is shown more clearly.

the Figures 1 to 7 show a preferred embodiment of the heating device 12 according to the invention in the form of an oven. It would also be conceivable to use the guide device 11 in other heating devices 12, for example in a steam cooker or a microwave.

In the following, however, the heating device 12 according to the invention is explained using the example of an oven.

As in particular in figure 1 shown, the oven has a housing 13, which is cuboid in the example.

The housing 13 encloses a heatable interior space 14 which is delimited at the rear by a rear wall 15 and at the front by a door 16 .

In a closed position, the door 16 closes access to the interior 14. The door is expediently designed as a flap and can be folded forward and downward when opened.

Furthermore, the housing has two opposite side walls 17a, 17b, a bottom 18 and an opposite top wall 19.

At least one product carrier 20, which can be removed from the housing 12 after the door 16 has been opened, is accommodated in the housing 13 for heating the product. In the example of an oven, the product support is designed as a product support, for example in the form of a baking tray or grating.

The Gutträger is according to figure 1 shown by way of example in the form of a baking tray, which has a support section 21 and a raised edge section 22 which delimits the support section all around.

As in particular in figure 2 and better yet in figure 3 shown, the guide device 11 has two guide units 23a, 23b, each of which is fastened to the housing 13 at a transverse distance from one another and is coupled to the product carrier 20 on the other hand and which guides the product carrier by a displacement movement between a pushed-in operating position 24 ( figure 4 ) and a pull-out position 25 that is at least partially pulled out of the housing 13 .

As in particular the synopsis of the figures 4 and 6 shows, the guide units 23a, 23b each have a guide linkage 26a, 26b consisting of several guide arms, which can be moved in the manner of an accordion and thereby guides the product carrier 20 between the operating and the extended position 25.

In the example shown, two guide units 23a, 23b are provided, each consisting of guide arms and each having a guide linkage 26a, 26b, the guide linkage together forming a kind of accordion guide.

As in particular in figure 3 shown, the guide rods 26a, 26b each have two swivel arms 27a, 27b; 28a, 28b, of which a first pivoting arm 27a, 28a is mounted pivotably about a first pivoting axis 29 on the housing side and a second pivoting arm 27b, 28b about a pivoting axis 30 on the goods carrier side. The two swivel arms 27a, 27b; 28a, 28b of a respective guide linkage 26a, 26b are via a third Pivot axis 31, which could also be referred to as a connecting joint, pivotally connected to each other.

As in particular in figure 3 shown, the two guide linkages 26a, 26b are attached by means of fastening means to the rear wall 15 of the housing 13 of the oven. The attachment means include an upper yoke 32a and a lower yoke 32b each secured to the rear wall 15 of the housing 13, but with the upper yoke 32a adjacent the top wall 19 and the lower yoke 32b adjacent the bottom 18 of the housing, respectively of the rear wall 15. The two yokes 32a, 32b extend essentially over the entire width of the rear wall 15.

As in particular in the figures 2 and 3 As shown, an upper swing arm support 33a is attached to the upper yoke 32a and a lower swing arm support 33b is attached to the lower yoke 32b, facing toward the interior 14 at the front of the associated yokes 32a, 32b. To fasten the swivel arm supports 33a, 33b, lugs 34a, 34b are provided, which protrude forwards from the front side of the respective yoke 32a, 32b in the direction of the interior space 14. The upper swivel axle carrier 33a sits on the upper nose 34a, while the lower swivel arm carrier 33b is overlapped by the lower nose 34b.

As in particular in figure 3 shown, the swivel arm supports 33a, 33b each have two bearing openings 35a, 35b; 36a, 36b, of which first bearing openings 35a, 36a on the upper and lower swivel arm carrier 33a, 33b are aligned with one another and form a receptacle for a vertical strut 37 of the first swivel arm 27a of the first guide linkage 26a. Through the vertical strut 37 runs the housing-side first swivel axis 29. At a distance from the first bearing openings 35a, 36a, there are second bearing openings 35b, 36b on the two swivel arm supports 33a, 33b, which are also aligned with one another and form receptacles for a further vertical strut 38 of the first swivel arm 28a of the second guide linkage 26b. The housing-side first pivot axis 29 of the first pivot arm of the second guide linkage 26b runs through the vertical strut 38 . As in particular in figure 3 shown, the first two swivel arms 27a, 28a of the two guide linkages 26a, 26b are constructed by vertical and horizontal struts. The vertical struts 37, 38 mentioned above are rotatably arranged in the associated bearing openings 35a, 35b and 36a, 36b, respectively. The first two swivel arms 27a, 28a each have an upper horizontal strut 39, which protrude obliquely forward from the vertical struts 37, 38 and are rigidly connected to the associated vertical struts 37, 38. Furthermore, the first swivel arms 27a, 28a also have a lower horizontal strut 40, which is arranged parallel to the upper horizontal strut 39 and is also designed to be rigid with the associated vertical struts 37, 38. The upper horizontal struts 39 and the lower horizontal struts 40 of the two swivel arms 27a, 28a are connected to one another at their free ends by a connecting strut 41, which is also designed as a vertical strut. The connecting strut 41 is pivoted on the one hand on the upper horizontal strut and on the other hand pivoted on the lower horizontal strut 40, as a result of which the third pivot axis 31 is formed. In turn, an upper and a lower horizontal strut 42, 43, which belong to the respective second swivel arms 27b, 28b of the guide rods 26a, 26b, extend from the respective connecting struts 41. The upper and lower horizontal struts 42, 43 are rigidly arranged on the connecting struts 41 and extend in contrast to the other upper and lower horizontal struts 39, 40 from the outside inwards, so that the horizontal struts 39, 40, 42, 43 form a total of the shape of a rhombus. The upper and lower horizontal struts 42, 43 of the respective second swivel arms 27b, 28b are, on the other hand, rigidly connected to vertical struts 44, 45, which in turn are pivotably mounted on a bulkhead 46.

As in particular in figure 1 shown, the bulkhead 46 is arranged in the interior 14 and is movably guided via the guide device 11 between an operating position located in the area of the rear wall 15 and a closed position 48 that is pulled out in the area of a housing opening 47 and essentially completely closes the housing opening 47 .

As in particular in figure 3 As shown, the bulkhead 46 includes a frame 49 having upper and lower horizontally extending frame members 49,50. The two vertical struts 44, 45 are rotatably mounted on the upper frame part 49, 50 on the one hand and on the lower frame part 49, 50 on the other hand.

The guide device 11 also includes a synchronization device 51 for synchronizing the movement of the guide units 23a, 23b during the displacement movement of the product carrier 20 coupled to the guide units 23a, 23b.

As in particular in figure 3 shown, the two vertical struts 37, 38 form a first coupling interface 52 in the area of the rear wall 15 of the housing 13, while the two vertical struts 44, 45 in the area of the bulkhead 46 form a second coupling interface 53, via which the guide units 23a, 23b are coupled on the one hand to the oven rear wall and on the other hand to the load carrier 20. How in particular the synopsis of Figures 3 , 4 , 5 and 6 shows, the synchronization device 51 comprises synchronization means via which the guide units 23a, 23b are positively coupled to one another.

The synchronization means are exemplified in the form of toothed segments 54a, 54b; 55a, 55b. As in particular in figure 5 shown, the swivel arms 27a, 28a of the guide rods 26a, 26b are assigned first toothed segments 54a, 55a, which are each arranged in the region of the first coupling interface 52 on the housing side.

The first toothed segments 54a, 55a each have a cylindrical base section 56 with a central through opening 57, the cylindrical base section 56 having a radial slot 58 running in the radial direction, via which assembly from the side of the associated vertical struts 37, 38 is possible. The radial slot 58 thus enables the toothed segments 54a, 55a to be inserted laterally onto the vertical strut 37, 38. As shown in particular in FIG figure 5 shown, the two legs of the cylindrical base section, which are separated by the radial slot 58, are connected to one another by means of a fastening screw 59, i.e. by tightening the fastening screw, the radial slot 58 can be narrowed, whereby the previously inserted toothed segment 54a, 55a is in the desired position Height along the vertical strut 37, 38 is fixed. As in particular in figure 5 shown, the cylindrical base section 56 has on its outer surface a tooth section 60 with a row of teeth 61 arranged one behind the other in the circumferential direction. As in particular in FIG figure 5 shown, the tooth sections 60 mesh with the teeth of the first toothed segment 54a on the first pivot axis 27a of the first guide linkage 26a Tooth section or the teeth 61 on the first toothed segment 55a of the first pivot arm 28a of the second guide linkage 26b.

As also in figure 3 shown, two mutually engaging toothed segments 54b, 55b are also provided on the second coupling interface 53, which are designed identically to the toothed segments 54a, 55a described above. In contrast to the toothed segments 54a, 55a described above, the other toothed segments 54b, 55b are located in the area of the lower horizontal sections 43. Here, too, the toothed sections mesh with the teeth 61 of one toothed segment 54b on the second pivot arm 27b of the first guide linkage 26a with the toothed sections, respectively the teeth 61 of the second pivot arm 28b of the second guide linkage 26b.

As in particular in figure 1 shown, the bulkhead 46 is coupled by means of coupling means to the at least one product carrier 20, which is shown by way of example in the form of a baking tray, in such a way that the bulkhead 46 can be moved from the operating position to the closed position 48 by pulling out the product carrier 20.

The coupling means comprise at least one hook element 62 and at least one hook holder 63 for releasably holding the at least one hook element. In the example, there are two hook elements 62 projecting backwards from the rear edge of the baking sheet on the rear wall of the baking sheet, while the associated hook holders are located on the two outer edge regions of the bulkhead 46 . The hook holders 63 each comprise a holder slot 64 running in the height direction of the bulkhead, and hanging members lying one above the other at a height distance in the height direction 65 penetrating the slot width of the associated mounting slot. The hook elements 62 or hanging hooks on the back of the baking tray can then be hung in the associated hanging members 65 at the desired height on the bulkhead.

the figure 4 shows the partition wall 46 and the product carrier 20 coupled thereto in the form of the baking tray in a rear operating position 24 in which the partition wall 46 is arranged close to the rear wall 15 of the housing 13 . The two guide linkages 26a, 26b are folded together to the maximum, with the two pivot axes 31 on the first guide linkage 26a and on the second guide linkage 26b lying outside the outer ends of the yokes 32a, 32b. The connecting struts 37, 38 on the first coupling interface 52 on the housing side and the vertical struts 44, 45 on the second coupling interface 53 on the load carrier side are aligned with a minimum distance from one another.

After completion of a cooking process of items to be cooked on the baking sheet, the door 16 is opened and the baking sheet is pulled out into its pull-out position 25 . The bulkhead 46 moves forward and essentially completely closes the housing opening 47 . The two guide linkages 26a, 26b are unfolded so that the two coupling interfaces 52, 53 are at the maximum distance from one another. The two third pivot axes 31 are shifted towards the center. Through the toothed segments 54a, 54b; 55a, 55b both at the first coupling interface 52 and at the second coupling interface 53, the movement of a guide linkage 26a is transferred synchronously into a movement of the other guide linkage 26b, that is, if, for example, the baking tray is handled by a left or right corner of the baking tray is pulled out, prevents the synchronization of the two guide linkages 26a, 26b via the toothed segments 54a, 54b; 55a, 55b that the baking tray tilts or even comes into contact with the side walls of the housing.

In addition to the task of ensuring that the housing opening 47 is essentially completely closed, the bulkhead 46 also has the task of protecting the lifting mechanism of the guide device 11, ie the two guide linkages 26a, 26b, so that they are not damaged or soiled.

Claims (4)

1. Heating device, in particular an oven, with a housing (13) surrounding a heatable interior (14), wherein the interior (143) is bounded by a rear wall (15) at the rear and at the front by a door (16) which, in a closed position, closes a housing opening (47) permitting access to the interior (14), wherein there is accommodated in the housing at least one shelf (20) for material to be heated, removable from the housing (13) after opening of the door (16), with a guiding device for guiding a shelf (20) in a housing (13), with at least two guide units (23a, 23b), each attached to the housing (13) on one side with lateral clearance from one another and on the other side connected to the shelf (20), and which guide the shelf (20) by means of a traversing movement between a pushed-in operating position (24) and a pulled-out position (25), at least partly withdrawn from the housing (13), wherein there is provided a synchronisation device (51) for synchronising the movement of the guide units (23a, 23b) in the traversing movement of the shelf (20) connected to the guide units (23a, 23b), wherein the guide units (23a, 23b) are fastened by mounting means to a rear wall (15) of the housing (13), and wherein the guide units (23a, 23b) each have a guide linkage (26a), 26b) comprised of several guiding arms and movable in the manner of an accordion and at the same time guiding the shelf between the operating and the pulled-out position (25), wherein the synchronisation device (51) has synchronisation means through which the guide units (23a, 23b) are positively coupled to one another, characterised in that the guiding arms are in the form of swivel arms (27a, 27b) able to pivot around body-side and/or shelf-side pivot axes (29, 30), wherein the synchronisation means are provided on the one hand on the shelf-side swivel arm (27b) of the one guide unit (23a) and on the other hand on the shelf-side swivel arm (28b) of the other guide unit (23b), and wherein the synchronisation means are in the form of toothed segments (54b, 55b), so mounted on the shelf-side swivel arms (27b, 28b) of the guide units (26a, 26b) that they are in meshing engagement with one another.
2. Heating device according to claim 1, characterised in that the guide linkages (26a), 26b) each have two swivel arms (27a, 27b; 28a, 28b), of which a first swivel arm (27a, 28a) is pivotably mounted around a housing-side first pivot axis (29), and a second swivel arm (27b, 28b) around a shelf-side second pivot axis (30), and wherein the two swivel arms (27a, 27b; 28a, 28b) are pivotably connected to one another by a third pivot axis (31).
3. Heating device according to any of the preceding claims, characterised in that the guide units (23a, 23b) are connected to the shelf (20) at a coupling interface (53) by coupling means, and the synchronisation means are provided in the area of the coupling interface (53).
4. Heating device according to claim 3, characterised in that the coupling means for connecting the guide units (23a, 23b) to the shelf (20) are in the form of a bulkhead (46), which is movably mounted by means of the guide units (23a, 23b) between an operating position located in the area of the rear wall (15) and a closed position (48), pulled out in the area of a housing opening (47).

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