EP1079180B1 - Door for a device, particularly an oven, with non-interchangeable mountable plates - Google Patents

Description

The invention relates to a door for a device, in particular a oven, preferably for the home.

Doors for household ovens are known with a viewing window, by a translucent outer pane and a translucent inner pane and possibly also a intermediate translucent washer is formed. For mounting and fastening these disks in A number of possibilities are known for the door.

EP 0 010 829 B1 discloses a viewing window unit for an oven door with a plurality of glass panes, each fastened in receiving grooves and arranged parallel to one another. The viewing window unit is installed as a module in the oven door using screws. It is not possible to remove the individual glass panes separately from the door. In some of the embodiments of this known oven door, the glass panes are of different sizes and are held in receiving grooves that are spaced apart at different distances.

DE 26 54 017 A1 discloses a self-contained window unit for installation in an oven door with two glass panes arranged parallel to one another. The front glass pane arranged on the outside of the door can be removed from the door by pressing it against a spring element and then removing it from the door. The other glass pane is fixed. Embodiments are disclosed in DE 26 54 017 A1 , in which the two glass panes and the associated holding devices have different dimensions.

DE 41 18 800 A1 discloses a door for a laboratory cabinet, in particular a heating cabinet, with a transparent outer pane, a transparent intermediate pane and a transparent inner pane. The washer is held at a distance from the outer pane and the inner pane by sheet metal spacers attached to the door frame. The three panes have identical geometrical dimensions and cannot be easily removed after assembly.

From DE-GM 77 36 544 an oven door is known with two support profiles that form the two vertical door edges. On the sides facing each other, the two support profiles have a plurality of vertical receiving grooves, into which two glass panes corresponding in width and height to the door dimensions are inserted. One of the two glass panes forms the outer pane of the door and is wider than the other glass pane that forms the inner pane of the door. The inner pane, on the other hand, is higher than the outer pane. Up and down the top and bottom edge of the door moldings are attached to the support profiles by means of screws that close the cavities of the support profiles up and down and thereby hold the inserted glass panes against displacement in the grooves. The glass panes can be replaced in the event of a broken glass by removing a cover strip. In the space between the two glass panes, additional receiving grooves are provided, into which further plates, such as additional radiation protection plates, for example made of perforated sheet metal or the like, can be inserted if necessary.

The additional grooves in the DE-GM 77 36 544th known door have the same distances from each other as the grooves provided for the inner pane. Thereby can when reassembling after removing the inner pane and the additional installation of another glass pane the two discs are confused. This is especially in disadvantageous in cases where the inner pane is different Has heat radiation reflectivity than the washer. To increase the reflection of the muffle escaping heat radiation is namely the inner pane often with a coating reflecting heat radiation provided, which is significantly less effective if the inner pane is accidentally installed in the intermediate position and already a large proportion of the heat radiation in the door interior has reached and through the components of the door Heat conduction can get outside.

DE 197 38 506 C1 discloses a door for a household appliance, in particular for a domestic oven, with an outer pane, two carrier elements fastened to the outer pane and an inner pane arranged on the two carrier elements on the side facing away from the outer pane. The inner pane is held removable in a special holding device. The holding device comprises two holding elements fastened to the carrier elements and a spring element which, in the installed state, presses the inner pane into the two holding elements and is arranged in a door handle strip attached to the carrier elements from above. Between the outer pane and the inner pane and the two carrier elements, an intermediate pane can be inserted, which has at its edge at least one plastic frame element for holding a defined distance between the intermediate pane and the outer pane and the inner pane. The washer can be installed in the door with the inner pane removed. The inner pane and the intermediate pane have different geometrical dimensions. However, since the washer is supported on the inner pane, the washer is not held in the door when the inner pane is removed and can therefore fall out of the door.

The invention is based on the object of a door for a Appliance, in particular a household appliance, preferably a cooking oven, specify in the up to at least three door panes unmistakable and can be assembled in a simple manner and, for example for cleaning purposes, also in simpler Way can be removed again.

This object is achieved according to the invention with the features of claim 1.

The door according to claim 1 is for a device, in particular for a cooking oven, and preferably provided for a household appliance and comprises a number m of at least three holding devices to hold one door pane each and a number n of at least two and at most m in each a clearly assigned holding device mountable and from this' removable door panes, in their geometric Dimensions are different from each other in pairs. The m holding devices are now adapted to the door panes designed and arranged so that each door pane after their assembly in the associated holding device independently of the presence of another mounted door window is held and the door windows only in a predetermined Sequence in the assigned holding devices assembled and only in the reverse order disassembled from the associated holding devices can.

This combination of measures creates a door which with a number of at least in principle arbitrarily selectable two out of the door in repeatable and ergonomic conveniently removable and reusable door panels can be equipped. The door windows are unmistakable only on the respectively provided and assigned Holding device can be installed in certain positions. Thereby it is ensured that one, for example from optical or thermal reasons with a coating or Tinted to be installed in a specific position Washer, already in production, but especially after one Disassembly of the panes for cleaning or replacement in case of damage, actually again at the intended position is installed. In cases where the door has more holding devices as door panes, so not all possible Positions are equipped with disks, is also the accidental installation of a removed door pane in one of the positions to be kept clear. By placing every door pane is individually held in the door, can not by that Removing a door window another door window can be loosened and accidentally fall out of the door. The risk of damage the door panes or an injury to the former The person who removes the door glass (assembly person) thereby significantly reduced. Through the constructive determination the installation and removal sequences for the door panes no markings on the door glass as a reminder required. The person who cleans the door panes in has taken out the given order, needs the Only install the door panes in the reverse order. This is especially true when there are three or more Door windows, a great mnemonic help. If further for example accidentally reinstalling a door window was forgotten, is due to the given assembly order and the unmistakability, if necessary by successive Remove the door panes already installed, quickly recognize to which of the free positions the forgotten Heard door pane. In addition, the assembly person becomes automatic causes to take out the disks one by one, so that security is increased.

Advantageous further developments and refinements of the door according to the invention result from those dependent on claim 1 Claims.

In general, the door panes become at least approximate parallel to a given installation level and thus to each other built into the door.

The dimensions of the door panes and the associated holding devices can laterally, i.e. parallel to one Slice plane in which the slices are preferably extended and / or vertical, i.e. perpendicular to the disc plane, be different from each other.

The lateral dimensions of the door glass and the lateral measured dimensions of the associated holding devices take preferably in the order specified for installation to.

The order in which the door panes are installed in the door are, preferably runs from the inside out, so that the innermost door pane must be installed first.

The door panes are in a preferred embodiment in the associated holding devices or at least kept form-fitting.

In a particularly advantageous embodiment, at least one of the holding devices a reset device and an opposite counter surface, wherein the reset device with the built-in door pane a restoring force against the counter surface. The Reset device can in particular with one or more elastic elements, i.e. Elements that are formed as a resilient element and / or from a material are formed with a low modulus of elasticity and in the event of a deformation, one against the deforming one Exercise force-directed restoring force.

The clear assignment of the door panes to the holding devices is particularly beneficial when the door panes consist of different materials and / or different physical, in particular thermal, properties, especially different reflectivities for Heat radiation, and for these reasons the order the door panes in the door is important.

Generally the door panes are at least partially translucent.

The holding devices for the door panes can be in one Design at least one common holding element with m separate support surfaces for placing each have a door window. The contact surfaces of each holding element can in particular in or with at least one Receiving groove for holding a door pane each his. At least one of these grooves is then at least two independent spatial directions, so that the door window in two directions perpendicular to it is limited (supported).

In a particularly advantageous embodiment, the door has an additional, generally forming an outer pane, Door pane open and at least two on this door pane fastened, in particular columnar and as profile parts trained, support elements, the support elements at least part of the holding devices for the wear the door panes already mentioned. It is then preferred with each of the carrier elements one of the aforementioned Holding elements connected to several contact surfaces or attached to it.

The outermost of the door panes is now preferably installed State of the associated holding device on the side of the two facing away from the additional pane Support elements at a distance from the support elements or held on top of it. The other n-1 door panes are preferably from the associated holding devices between the support elements at a distance from the support elements or on mutually facing side surfaces of the Support elements held tight.

The design of the holding devices is particularly advantageous such that the door windows in the holding devices can only be installed by hand without tools and / or from them are expandable.

The door is used in a particularly advantageous manner of the invention for closing the loading opening of a Oven muffle of a household oven.

FIG 1

einen Teil einer Tür mit einem Halteelement für drei Türscheiben, die nicht eingebaut sind, in einer perspektivischen Ansicht,

FIG 2

den Teil der Tür gemäß FIG 1 mit einer in das Haltelement eingebauten Türscheibe in einer perspektivischen Ansicht,

FIG 3

den Teil die Tür gemäß FIG 1 und 2 mit zwei in das Halteelement eingebauten Türscheiben in einer perspektivischen Ansicht,

FIG 4

den Teil die Tür gemäß den FIG 1 bis 3 mit drei in das Halteelement eingebauten Türscheiben in einer perspektivischen Ansicht,

FIG 5

eine perspektivische Gesamtansicht einer Tür mit einem Halteelement gemäß FIG 3 mit zwei eingebauten Türscheiben,

FIG 6

einen Teil einer Tür mit einem elastischen Element für drei Türscheiben, die nicht eingebaut sind, in einer perspektivischen Ansicht,

FIG 7

den Teil der Tür gemäß FIG 6 mit einer gegen das elastische Element gedrückten Türscheibe in einer perspektivischen Ansicht,

FIG 8

den Teil der Tür gemäß FIG 6 und 7 mit zwei gegen das elastische Element gedrückten Türscheiben in einer perspektivischen Ansicht,

FIG 9

den Teil der Tür gemäß FIG 6 bis 8 mit drei gegen das elastische Element gedrückten Türscheiben in einer Längsschnittdarstellung,

FIG 10

eine Tür mit drei in jeweils eine Halteeinrichtung eingebauten Türscheiben in einem Längsschnitt,

FIG 11

einen Teil einer Tür mit einem Haltelement für drei Türscheiben unterschiedlicher Dicke.

To further explain the invention, reference is made to the drawings, in each of which an exemplary embodiment of the door according to the invention is shown schematically. Show it:

FIG. 1

a part of a door with a holding element for three door panes, which are not installed, in a perspective view,

FIG 2

1 the part of the door according to FIG. 1 with a door pane installed in the holding element in a perspective view,

FIG 3

1 shows the part of the door according to FIGS. 1 and 2 with two door panes installed in the holding element in a perspective view,

FIG 4

the part of the door according to FIGS 1 to 3 with three door panes installed in the holding element in a perspective view,

FIG 5

3 shows an overall perspective view of a door with a holding element according to FIG. 3 with two built-in door panes,

FIG 6

a part of a door with an elastic element for three door panes, which are not installed, in a perspective view,

FIG 7

6 shows the part of the door according to FIG. 6 with a door pane pressed against the elastic element in a perspective view,

FIG 8

6 shows the part of the door according to FIGS. 6 and 7 with two door panes pressed against the elastic element in a perspective view,

FIG. 9

the part of the door according to FIG 6 to 8 with three door panes pressed against the elastic element in a longitudinal sectional view,

FIG 10

a door with three door panes, each installed in a holding device, in a longitudinal section,

FIG 11

part of a door with a holding element for three door panes of different thickness.

Corresponding parts are shown in FIGS. 1 to 11 provided with the same reference number:

1 to 4 show a holding element (receiving part) 7 for Holding three door panes of a door, wherein in FIG until 4 the number of door panes increases.

1 shows the holding element 7 with none installed Door glass. For each of the three - not yet shown in FIG. 1 - Door panes, the holding element 7 has a receiving groove 72, 74 and 79 respectively. The receiving groove 72 is between a first boundary part 170 and a second boundary part 171 of the holding element 7 formed, the receiving groove 79 between the second limiting part 171 and a third Limiting part 172 of the holding element 7 and the third Receiving groove 74 between the third delimiting part 172 and a fourth boundary part 173 of the holding element 7. In each of the receiving grooves 72, 74 and 79 is down to the bottom 174 or 175 or 176 in an insertion direction along the an arrow labeled ER can be inserted into each door pane. By delimiting parts 170 to 173 on the one hand and soils 174 to 176, on the other hand, will be introduced Door pane limited in its degrees of freedom of movement, that they are only essentially parallel to the associated one Recording groove 72, 74 and 79 is movable and otherwise in is kept essentially free of play. For lateral limitation the movement of the door glass in one direction is further a lateral limiting part 73 on the receiving groove 72 intended. Such lateral boundary parts can also on the other grooves 74 and 79, preferably in the same direction (on the same side) as the boundary part 73 can be arranged in the receiving groove 72. in the illustrated embodiment are the grooves 72, 74 and 79 for taking door panes with straight edges, preferably at right angles collide (rectangular door panes), trained. The receiving grooves can also have a predetermined edge contour the door panes are adapted, which then in particular can be concave or convex.

According to FIGS. 1 to 4, the holding element 7 now has at least one predominantly cuboidal wrapping surface on and is open on one side of this cuboid basic shape educated. An inner side wall of the holding member 7 is designated 76 and an outer side wall, the extension the boundary part 73 forms, with 77. The two Sidewalls 76 and 77 are perpendicular to one another Cover wall 71, which is in the extension into the limiting part 170 passes, connected. 1 to 4 The illustrated embodiment is the holding element 7 as Hollow section formed and with its from the top wall 71 facing away, open side applied to a support member 5. The wall of the carrier element 5 is the inner wall the holding element 7 adapted in the shape so that an inner side wall 56 of the carrier element 5 on the inside the side wall 76 of the holding element 7, an outer Side wall 57 of the carrier element 5 on the outer side wall 77 of the holding element 7 and an upper side 51 of the carrier element 5 on the inside of the top wall 71 of the holding element 7 comes to rest. The holding element 7 is by means of Locking projections 78 protruding on the inside of its wall in corresponding openings 58 in the wall of the carrier element 5 engaged. In Figures 1 to 4 is only the locking the outer side wall 77 with the holding element 7 the outer side wall 57 of the carrier element 5 can be seen. The Carrier element 5 is now also designed as a hollow profile part, whose walls 51, 56 and 57 in the manner of a column in run essentially parallel to the insertion direction ER, and preferably from a corresponding, in particular U-shaped, profiled sheet, preferably a steel sheet, educated.

Close to the side walls 56 and 57 of the carrier element 5 flange-shaped fasteners (flange edges) 53 and 50, with which the carrier element 5 via an adhesive 99 is attached to an outer pane 3. One at 59 Designated shape (e.g. embossing) in the fastening part 53 serves to keep a defined distance of the fastening part 53 from the surface of the outer pane 3, so that the adhesive 99 are applied in a defined thickness can. Similar formations 59 are preferably also in the opposite fastening part 50 is provided. Through the comparatively large adhesive surface of the adhesive 99 Forces from the support element 5 evenly on the outer disc 3 transferred so that the outer pane 3 shatters practically avoided by thermal or mechanical stresses becomes. The adhesive connection 99 also ensures a gentle connection of the carrier element 5 with the outer pane 3 in the making. However, it can also be a Screw connection, a snap connection or another connection of the carrier element 5 with the outer pane 3 his.

The holding element 7 is a molded part made of a polymer compound (Polymer plastic), preferably a thermoplastic or thermosetting plastic, wherein all components, in particular the limiting parts 73, 170 to 173 and the bottoms 174 to 176 of the receiving grooves 72, 74 and 79 as well as the side walls 76 and 77 and the top wall 71 in a single manufacturing process, particularly one Injection molding process or a drawing process are. Without limitation of generality as materials for the holding element 7 halogenated or non-halogenated Called hydrocarbon polymers, for example Polyethylene, polypropylene, polystyrene, polyurethane, Polyvinyl chloride and fluorocarbon materials as well as copolymer compounds with these polymers. In the applications at higher temperatures like in a oven door accordingly selected temperature-resistant plastics.

The holding element 7 can also, for example, with the carrier element 5 releasably connected by means of a screw connection or permanently connected by means of an adhesive connection his.

With the holding element 7 fastened on the carrier element 5 run the two closest to the outer pane 3, inner grooves 74 and 79 only up to the inner Side wall 56 of the carrier element 5 or a preceding one, not shown limiting part of the holding element 7. The outer, most distant from the outer pane 3 lying receiving groove 72 runs above the carrier element 5 over the entire width of its top 51 to the boundary part 73, which is directly on the outer side wall 57 of the carrier part 5 connects. The holding element 7 is thus of the support element 5 practically over its entire length Supported inner surface and thus kept stable.

In the innermost receiving groove 74 of the holding element 7 is in the embodiment shown in FIG 2, now a door window 4, of which only one tapering at right angles Corner is shown, inserted in the insertion direction ER. A lower edge 45 of the door pane 4 lies on the floor 176 the receiving groove '74. An upper side 41 ′ of the door pane 4 lies against the boundary part 172. and an underside 42 the limiting part 173 of the holding element 7. One in the right Angle to top 41 and bottom 42 and the bottom Edge 45 extending side edge 46 of the door window 4 can now either on the side wall 56 of the carrier element 5 concern or from a side, not shown Boundary part (spacer) of the receiving groove 74 from the Side wall 56 of the support member 5 are kept spaced. Such an additional lateral limiting part in the receiving groove 74, which is molded onto the molded part again reduces the heat conduction between the carrier element 5 and the door window 4 and rattling noises when otherwise possible Striking the door glass 4 on the side wall 56 of the Carrier element 5.

3 is now in addition to the already in the receiving groove 74 inserted inner door pane 4 a second door pane 9 in the receiving groove 79 in the insertion direction ER introduced. The door glass 9 lies on the floor 175 of the Receiving groove 79 as a counter surface (contact surface) with your lower edge 95 and is with the top 91 on the boundary part 171 and the underside 92 on the limiting part 172 supported. The side edge 96 of the door pane 9 can be analog to the door pane 4 according to FIG. 2 again on the side wall 56 of the support element 5 or from one not shown lateral limiting part of the receiving groove 79 from the side wall 56 of the carrier element 5 is kept at a distance his.

4 shows an embodiment in which additionally as third door pane an inner pane 2 in the holding element 7 built-in. The inner pane 2 is in the receiving groove 72 in the direction of insertion ER introduced. In the receiving groove 72 is the inner pane 2 held in four of six spatial directions through the 'limiting part 170, the bottom 174, the limiting part 171 and the lateral limiting part 73. The lower edge 25 of the inner pane 2 lies on the bottom 174 of the Receiving groove 72, the top 21 on the limiting part 170, the Bottom 22 on the boundary part 171 and the side Edge 26 on the lateral boundary part 73.

According to FIGS. 1 to 4, three, in particular, are in holding element 7 Door panes designed as rectangular flat bodies 4, 9 and 2 spaced apart and substantially Can be installed parallel to each other.

5 shows a door with an outer pane 3 and two built-in door panes 4 and 9. On a flat side of the The outer pane 3 is a carrier element 5 in an edge region with a holding element 7 carried by it according to FIG. 1 to 4 as well as in an opposite edge area trained and parallel to the support member 5th extending support element 6, which is a corresponding to the holding element 7 designed holding element 8 carries, attached. The carrier element 6 and the holding element 8 are at least largely mirror-symmetrical with respect to a parallel to the support elements 5 and 6 and perpendicular to the outer pane 3 directed plane of symmetry to the support element 5 and the Holding element 7 arranged and formed. The holding element 8 has a top wall 81, analogous to the holding element 7 Top 61 of the support member 6 and two from the outside to the Side walls 66 and 67 of the support element 6 adjacent side walls 86 and 87 respectively. The inner side wall 86 of the holding element 8 and the inner side wall 76 of the holding element 7 are facing each other. The holding element 8 also has three grooves 82, 84 and 89 on the same as the grooves 72, 74 and 79 are formed on the holding element 7.

The holding elements 7 and 8 are at the lower ends, respectively the associated support elements 5 and 6 respectively. To the Ends of the support elements facing away from the holding elements 7 and 8 5 and 6 is perpendicular to the carrier elements 5 and 6 extending carrier strip 10 in fastening areas 155 or 165 attached. In the carrier strip 10 are elastic Elements 11, 12 and 13 and possibly also assembly aids 145 and 15 integrated for the assembly of the door panes. Each elastic element 11 to 13 has a support surface (counter surface, pressure surface) for each of the door panes 4 and 9 to be assembled or assembled as well the - not shown - inner pane 2. For assembly the two door panes 4 and 9 are first in succession in the forward insertion direction labeled EV against the associated contact surfaces of the elastic Elements 11 to 13 pressed and centered accordingly then subsequently under the action of the elastic Elements 11 to 13 exerted restoring forces in the opposite direction ER in the associated receiving grooves 74 and 84 or 79 and 89 in the holding elements 7 and 8 to be introduced. Similarly, the one shown in FIG Inner pane 2, not shown, can be mounted. To take out the door panes 4 and 9 are described Assembly steps in reverse, i.e. the door panes 9 and 4 are now in reverse order one after the other against the restoring force of the elastic elements 11 to 13 and then out of the grooves 79 and 89 or 74 and 84 taken. The assembly aids 14 and 15 facilitate the positioning of the door panes 4 and 9 on the elastic elements 11, 12 and 13 and in the holding elements 7 and 8, but generally have no bearing Function for the door panes 4 and 9. The structure and the Function of the elastic elements 11, 12 and 13 and the Assembly aids 14 and 15 will be described later with reference to FIGS. 6 to 9 described in more detail.

The built-in innermost door pane 4 and the built-in second innermost door pane 9 are in the associated receiving groove 74 and 79 of the holding element 7 and the associated receiving groove 84 and 89 of the holding element 8 in each of the two lower corner areas as well as with their upper edge the contact surfaces of the elastic elements 11 to 13 held and cantilevered in between. The holding elements 7 and 8 and the elastic elements 11 to 13 together form two holding devices for the two door panes 4 and 9 with a comparatively small contact area to the door panes 4 and 9, so that thermal losses due to heat conduction be kept low in the door. Both door panes 4 and 9 are between the side wall 56 of the carrier element 5 and the side wall 66 of the carrier element 6 held and by limited laterally in their movement.

The outermost 'receiving grooves 72 of the holding member 7 and 82 of the holding element 8 and the elastic Elements 11 to 13 also form a holding device for an inner pane 2, not shown, as in FIG. 4. For spacing the inner pane 2 from the carrier elements 5 and 6 are on tops 51 and 61 of the support members 5 and 6 each have at least one spacer 55 and 65, respectively arranged, which are elastic for mechanical Damping of the inner pane and reduction of impact noises, and preferably at least on the inner pane 2 facing surface, in particular by a Sliding coating made of polyfluoroethylene, designed to be slippery are so that the inner pane 2 on them with a low sliding friction can be moved along. The Dikken (Heights) of the spacers 55 and 65 are now preferred chosen so large that the spacers 55 and 65 not fully elastic when the inner pane 2 is installed are demolded and thereby the inner pane 2 in their holding devices pretension to noises in the door to a minimum.

Particularly suitable elastic materials for the elastic elements 11 to 13 and / or the spacers 55 and 65 are elastic polymers (elastomers) based on a plastic, a natural rubber or a plastic / natural rubber compound. A particularly advantageous material is a (solid) silicone (polysiloxane or polyfluorosiloxane), which is resistant even at higher temperatures. However, it is also possible, for example, to use a polyurethane or a plastic known under the trade name Santoprene or also acrylic ester elastomers, ethylene-propylene-diene elastomers or ethylene-vinyl acetate copolymers or a plastic sold under the trade name Hostaform (if the temperature requirements are not too high) ). Further advantageous elastomers are halogen-carbon polymers, in particular fluorocarbon elastomers or copolymers with fluorocarbon elastomers, for example a copolymer of tetrafluoroethylene and propylene, or chlorobutadiene elastomers. Elastomers with halogen (especially fluorine) carbon compounds are also more temperature-resistant than pure hydrocarbons and have very low coefficients of friction. The modulus of elasticity (resistance to deformation) of the elastic material can be chosen in particular below approximately 5000 N / mm ² , preferably below 2000 N / mm ² .

The door structure according to FIG 5 is characterized by a very simple Construction with a small number of parts. Each of the panes 4 and 9 lying in the door interior and the - not shown - inner pane 2 are without aid can only be installed by hand in the door and can be dismantled again. This enables one very easy removal of the door panes 4, 9 and 2, in particular for cleaning purposes or to replace if damaged or broken glass.

In all embodiments, the door is generally for Closing an opening to a device interior and in particular to close a loading opening of a Cooking oven, preferably a household oven, provided but is not limited to this application.

All door panes 2, 3, 4 and 9 are preferably at least predominantly from an optically transparent material, in particular a glass or a glass ceramic. With the transparent door panes. 3, 4, 9 and 2 is then a large area Viewing window of the door formed in order from the Door locked device interior, especially the oven muffle interior to be able to see.

Especially in applications where the door is also a certain thermal insulation of the closed by it Device interior must ensure from the outside, show the Door panes of the door often have different physical and especially thermal properties. If how for example in a cooking oven, the interior on a comparatively high temperature (for example 300 ° C for cooking and even up to 500 ° C for a pyrolytic Cleaning process), this is the result of the Stefan-Boltzmann law a comparatively high at these high temperatures high proportion of heat in the form of heat radiation. Around Keeping heat radiation inside the device is therefore essential preferably the one closest to the interior of the device Door pane, here the inner pane 2, and if necessary also the other door panes, here the door pane 9 and optionally also the door pane 4 on its surface provided with a coating reflecting heat radiation. Furthermore, the inner pane 2 must have a higher temperature withstand as the outer door panels 9 and 4, so that usually also different temperature resistant Materials for the inner pane 2, the door pane 9 and the door pane 4 can be selected.

It is for a desired optimal heat insulation effect therefore necessary, the door panes 2, 9 and 4 always distinctive to be installed in the specified positions.

The inner pane 2 is now due to the door panes 9 and 4 different widths, measured perpendicular to the Directions EV and ER, and the corresponding further outwards going receiving grooves 72 and 82 of the holding elements 7 and 8 cannot be confused with one of the two door panes 9 and 4, so that in particular they also measured the same height parallel to the directions ER and EV, like one of the door panes May have 9 or 4. For this reason, the two grooves 72 and 79 according to FIGS 1 to 4 (and correspondingly the receiving grooves 82 and 89 in the holding element 8) of the holding element 7 also in one plane, that is on the same Height, run.

To distinguish the door panes 4 and 9 from each other 1 to 5 are the door panes 4 and 9 measured in their heights, parallel to the direction EV and ER, different sizes, and the elastic elements 11, 12 and 13 and the associated receiving grooves 79 and 89 and 74 and 84 of the holding elements 7 and 8 respectively correspondingly different distances from each other are adapted to the dimensions of the door panes 4 and 9. The receiving grooves 74 of the holding element 7 and 84 of the holding element 8 for the door pane 4 are further up counter to the insertion direction ER offset as the receiving grooves 79 and 89 for the door window 9. The differences in the The heights of the door panes 4 and 9 should not be too large in order to maintain a sufficiently large viewing window and are generally between 2 mm and 40 mm, in particular between 5 mm and 20 mm. Through these measures take the lateral surfaces of the door panes 4, 9 and 2 from inside out. The innermost door pane 4 is therefore smaller than the door window 9, while the door window 9 in turn is smaller than the inner pane 2.

If you want to additionally guarantee that individual or all door panes 2, 4 and 9 always with the same surface can point inwards (or outwards), the corresponding Holding devices in a further development, not shown, for example through asymmetrical training the receiving grooves 72, 79 and 74 of the holding element 7 in comparison to the holding grooves 82, 89 and 84 in the holding element 8, and the door panes 2, 9 and'4 adapted to each other that the flat sides of the door panes 2, 4 and 9 can no longer be exchanged.

6 now shows a section of the door according to FIG top right corner. The door panes 4 and 9 are not installed and therefore not shown. Thereby the elastic element 13 is practically entirely visible. The elastic element 13 is formed with a shaped profile part, that a coherent wall 30 and several chambers (Cavities, gaps) 31, which by each a partial area (partition) of the wall 30 from each other are separated. In the illustrated embodiment, the Chambers 31 open on the sides and only parallel to the direction of insertion EV limited by the wall 30. The wall 30 of the elastic element 13 includes individual, under certain Angles directed towards each other, in the relieved state in essentially straight and interconnected webs, so that the chambers 31 have a generally polyhedral shape exhibit. The elastic element 13 is in an associated Receiving pocket 23, which is formed on the carrier strip 10 is plugged in or pinched and can be removed from it can be easily removed. On the, seen in the insertion direction EV, rear area is the wall 30 of the elastic Elements 13 formed flat and lies on a back Flat side of the carrier strip 10. On the opposite Side facing the direction EV, the wall 30 is of stepped design and has three levels Contact surfaces 32, 39 and 34 with the vector EV as the normal vector and sloping flanks 33 between the support area 32 and the support area 39 and 35 between the Support area 39 and 34 and following the support surface 34 a further flank 36. Now they are Support surface 34 for the door pane 4, the support surface 39 for the door pane 9 and the support surface 32 for the inner pane 2 provided. Flanks 36, 35 and 33 are included for stabilization and as guide aids for the door panes advantageous. Through this design of the elastic element 13 as a hollow profile part with several chambers Spring action compared to a solid body made of the same (elastic) material increased significantly. With one accordingly highly elastic material can also be a solid body can be used as elastic element 13.

Another assembly aid is designated and includes 14 essentially three parallel to and from each other spaced flat guide members 141, 142 and 143. The support bar 10 is in the edge region with the Edge area of the carrier element 5 in a fastening area 155 connected, for example screwed or clipped. The carrier element is again in the area of the flange edge 53 glued to the outer pane 3.

7, the door pane 4 is now used as the first door pane in the insertion direction EV on the associated contact surface 34 of the elastic element 13 with a certain force pressed. The on the elastic member 13 through the door glass 4 exerted force leads to a deformation of the below areas of the wall lying on the support surface 34 30, which is indicated by a dashed, curvilinear deformation the webs are indicated. The two leadership elements 142 and 143 of the assembly aid 14 serve as a means for positioning the door pane 4, however, are generally with the door pane 4 inserted, not on the door pane 4 on. If the door pane 4 by a predetermined insertion length in the direction of the insertion direction EV against the elastic element 13 has been pressed, it can be on the opposite 5 in the grooves 74 and 84 of the Holding elements 7 and 8 are introduced and is then from the restoring force of the elastic element 13 (and the other elastic elements 11 and 12) in these grooves 74 or 84 pressed. These are preferably elastic Element 13, the door pane 4 and the grooves 74 and 84 matched so that the door pane 4 in Completely installed condition if they are in the receiving grooves 74 and 84 is inserted, kept under a certain tension is, the elastic element 13 under a certain Preload is present and is not relieved of power and thus a restoring force on the door pane 4 also in their installed state. This will make the Door pane 4 stable between the elastic elements 11 to 13 on one side and the receiving grooves 74 and 84 held on the other side and cannot rattle or even fall out.

8 shows the assembly of the next door pane 9 on elastic element 13. The door pane.9 is analogous to 7 again in the insertion direction EV against the associated bearing surface 39 of the elastic element 13 pressed. Now serve to introduce the door pane 9 the guide elements 141 and 142 as guide aids.

9 illustrates in a longitudinal section that as a hollow profile part trained elastic element 13 with three associated Support surfaces 34, 39 and 32 built-in door panes 4, 9 and 2. The deformation of the webs of the wall 30 by the door panes 4, 9 inserted and held under pressure and 2 from the relieved position is indicated in the drawing. The elastic element exercises through this elastic deformation 13 a restoring force against the insertion direction EV through which the door panes 4, 9 and 2 are pressed down become.

The different heights of the holding devices for the Door panes 2, 4 and 9 can be used in all embodiments by staggered support surfaces on the elastic elements 11, 12 and 13 or on the holding elements 7 and 8 in connection with at the same level or likewise tiered support surfaces on the other Side, so on the holding elements 7 and 8 or the elastic Elements 11, 12 and 13 can be realized.

The elastic elements 11, 12 and 13 and the holding elements 7 and 8 can also be independent of the distinctive Pane installation can be claimed.

1 to 9 form the holding elements 7 and 8 on the one hand and the elastic members 11 to 13 on the other hand together three holding devices for the three door panes 4, 9 and 2, each door pane, 2, 9 and 4 individually and independent of the other door panes. By the special design of the elastic elements 11 to 13 is due to the deformation of the elastic element 13 in the Installation order of the door panes 4, 9 and finally 2 the restoring force for the individual door panes increased so that even with the significantly thinner training of the elastic element 13 in the area of the contact surface 32 the bias caused by the door panes 4 and 9 a sufficient restoring force for the door pane 2 shows up. The door panes 4, 9 and 2 are always in the specified Order from the inside to the outside as well as from expand outside inside.

10 now shows another embodiment of a door, at of the three door panes 100, 200 and 300 each in an associated one Holding device can be installed and removed from this again are. The holding devices for the door panes 100, 200 and 300 are each with a receptacle 101 and 201 or 301, in each of which a spring element 103 or 203 or 303 is arranged on one side and with a receiving groove 102 or 202 or 302 formed on the other side. The recordings 101, 201 and 301 are preferably in a common receiving part 150 and provided by intermediate parts 204 and 304 formed in receiving part 150 separated from each other. The receiving grooves 102, 202 and 302 are formed in a common holding element 160 and preferably arranged in one plane so that the introduced Door panes 100, 200 and 300 closed at the same height come to lie. The height of the first holding device for the Door pane 100 is designated h1 and is determined by the distance between the upper limit of the receptacle 101 and the lower limit of the receiving groove 102. 'are corresponding the heights of the second holding device for the door window 200 with h2 and for the third holding device with h3. The heights h1 to h3 of the three holding devices take in the order of an installation direction E from the outside inwards. The distance of the door pane 100, 200 or 300 from the upper limit of the receptacles 101 or 201 or 301 is designated with d1 or d2 or d3. The heights the door panes 100, 200 and 300 correspond to that Differences h1-d1 or h2-d2 or h3-d3 and also take in installation direction E from outside to inside. At the Front of the receiving part 150 and holding member 160 is an outer pane 400 is arranged. On the opposite Side are support elements 104 for the inner pane 100 on Receiving part 150 provided to this in addition support. The door panels 100, 200 and 300 are through associated spring elements 103, 203 and 303 with a predetermined restoring force in the receiving grooves 102, 202 or 302 pressed and thereby fixed. To remove the Door panes 100, 200 or 300 become the respective door panes in the direction labeled F1 or F2 or F3 from the Recording groove 102, 202 and 302 against the spring force of the Spring element 103, 203 and 303 pulled. In order to make this possible, is of course the depth t of the receiving grooves 102 to 302 to be chosen smaller than the distances d1 to d3, so that the Door panes 100 to 300 at all from the receiving grooves 102 to 302 can be removed. As soon as the one to be removed Door pane 100, 200 or 300 from the corresponding mounting groove 102, 202 or 302 is free, the door window can be inclined to the front, opposite to installation direction E out of the door be removed. Disassembly of the door panes 100 to 300 is to be carried out in a predetermined order namely, first the door pane 100, then the door pane 200 and finally the door pane 300. The spring elements 103, 203 and 303 can be formed with and are attached to the steel springs Receiving part 150 attached, for example by gluing, Screw or rivet. Because of the different Sizes of door panes 100, 200 and 300 as well as the corresponding ones Holding devices are the door panes 100, 200 and 300 unmistakably installable and removable.

The unmistakability of the door panes 100, 200 and 300 can additionally or alternatively also by different Thicknesses of the door panes 100 to 300 and associated mounting grooves can be achieved in the holding element 160. Such Embodiment is shown in FIG 11. The thickness of the door panes 100, 200 and 300 are designated a1, a2 and a3, the corresponding widths of the receiving grooves 102 or 202 or 302 with b1 or b2 or b3.

Claims (18)

1. Door for an appliance, in particular for a cooking oven, preferably for domestic use, having

   a) a number m of at least three holding devices (74, 84, 34 and 79, 89, 39, and 72, 82, 32 respectively) for holding a respective door panel (4, 9, 2),

   b) a number n of at least two and at most m door panels (4, 9, 2),
   wherein

   c) the n door panels have different geometric dimensions from one another and

   d) each of the n door panels can be fitted in respectively only one of the m holding devices and removed therefrom again,

   e) each fitted door panel is held in the associated holding device independently of the presence of a further fitted door panel, and

   f) the door panels may be fitted in a specified sequence one after another in the associated holding devices and removed from the associated holding devices one after another in the reverse sequence.
2. Door according to claim 1, wherein door panels fitted in their associated holding devices are respectively disposed at least approximately parallel to one another.
3. Door according to claim 2, wherein the door panels have laterally different faces and the holding devices accordingly have different lateral extensions.
4. Door according to claim 3, wherein the laterally measured faces of the door panels and the laterally measured extensions of the holding devices increase in the sequence specified for assembly.
5. Door according to one of the preceding claims, wherein the sequence specified for fitting of the door panels runs from the inside outwards.
6. Door according to one of the preceding claims, wherein door panels vary in thickness in pairs, and the holding devices have correspondingly different extensions.
7. Door according to one of the preceding claims, wherein each fitted door panel is held in the associated holding device substantially without play, in particular under the effect of a clamping force.
8. Door according to one of the preceding claims, wherein at least one of the holding devices has a restoring device (11, 12, 13) and an opposing counter-face (72, 74, 79, 82, 84, 89) and wherein the restoring device pushes the fitted door panel against the counter-face with a restoring force.
9. Door according to one of the preceding claims, wherein the door panels consist of different materials and/or have different physical, in particular thermal, properties, in particular different degrees of reflectivity for heat radiation.
10. Door according to one of the preceding claims, wherein the door panels are optically transparent at least in part.
11. Door according to one of the preceding claims, having at least one holding element (7, 8) with m mutually separated mounting faces for the mounting of at least one door panel as a common component of the holding devices for the door panels.
12. Door according to claim 11, wherein each holding element has at least one receiving groove (72, 74, 79, 82, 84, 89) for holding a door panel.
13. Door according to claim 12, wherein at least one receiving groove of each holding element extends in at least two independent spatial directions.
14. Door according to one of the preceding claims, having an additional door panel (3) and at least two support elements (5, 6), which are connected to the door panel and are in particular column-like, the carrying elements supporting at least part of the holding elements.
15. Door according to claim 14 with respect to one of claims 11 to 13, wherein a respective holding element is connected to each support element.
16. Door according to claim 14 or 15, wherein the outermost of the n door panels (2) is held in the fitted state by the associated holding device on the side of the two support elements remote from the additional panel so as to be spaced from the support elements or held flush therewith, and the further n-1 door panels (4, 9) are held by the associated holding devices between the support elements so as to be spaced apart from the support elements or flush with mutually associated side faces of the support elements.
17. Door according to one of the preceding claims, wherein the door panels can be fitted in the holding devices and/or removed therefrom without a tool.
18. Cooking oven having

    a) an oven muffle with a loading aperture for inserting food to be cooked and

    b) a door according to one of the preceding claims for closing the loading aperture of the oven muffle.

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