EP1081437B1 - Door for a device, in particular an oven, with panel support for several panels - Google Patents

Description

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

There are doors for Haushaltsgaröfen known with a viewing window, which is formed by a translucent outer pane and a translucent inner pane and optionally also an interposed translucent intermediate disc. For mounting and fixing these discs in the door a variety of ways are known.

Out EP 0 010 829 B1 is a viewing window unit for a oven door known with several, each mounted in receiving grooves and arranged parallel to each other glass sheets. The viewing window unit is installed as a module in the oven door by means of screws. Separate removal of the individual glass panes from the door is not possible. In some of the embodiments of this known oven door, the glass panes are of different sizes and held in differently spaced receiving grooves.

The DE 26 54 017 A1 discloses a self-contained window unit for installation in a oven door with two glass panes arranged parallel to one another. The front, arranged on the outside of the door glass is removable from the door, in which it is pressed against a spring element and then taken out of the door. The other glass pane is firmly mounted. It is in the DE 26 54 017 A1 embodiments disclosed in which the two glass sheets and the associated holding means have different dimensions.

Out DE 41 18 800 A1 is a door for a laboratory cabinet, in particular a heating cabinet, known with a transparent outer pane, a transparent intermediate pane and a transparent inner pane. The washer is held by the outer pane and the inner pane respectively by fixed to the door frame spacers made of sheet metal at a distance. The three discs have identical geometric dimensions and are not expandable after their installation without much effort.

From DE-GM 77 36 544 a oven door is known with two carrier profiles that form the two vertical door edges. On sides facing each other, the two carrier 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. By contrast, the inner pane is designed to be higher than the outer pane. Up and down the upper and lower edge of the door forming end strips are attached to the support profiles by means of screws which close the cavities of the support profiles up and down and thereby hold the inserted glass sheets against displacement in the grooves. By removing a closing strip, the glass panes can be replaced in case of glass breakage. In the space between the two glass panes further receiving grooves are provided, in which, if necessary, further plates, such as additional blasting protection plates, for example, perforated metal sheet or the like, can be inserted.

The additional grooves at the out of the DE-GM 77 36 544 known door have the same distances from each other as provided for the inner pane receiving grooves. This can be confused during reassembly after removing the inner pane and the additional installation of another glass pane, the two discs. This is particularly disadvantageous in cases where the inner pane has a different heat radiation reflectivity than the intermediate pane. To intensify the reflection of exiting from the oven muffle heat radiation namely the inner pane is often provided with a heat radiation reflecting coating that is significantly less effective if the inner pane is accidentally installed in the intermediate position and already a large proportion of the heat radiation has passed into the door interior and about the components of the door can pass through heat conduction to the outside.

DE 197 38 506 C1 discloses a door for a household appliance, in particular for a Haushaltsgarofen, with an outer pane, two attached to the outer pane support members and arranged on the two support elements on the side remote from the outer pane side inner 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, when installed, presses the inner pane into the two holding elements and is arranged in a door grip strip applied from above onto the carrier elements. Between the outer pane and the inner pane and the two support elements, an intermediate disc can be inserted, which has at its edge at least one frame element made of plastic for holding in each case a defined distance of the intermediate disc to the outer pane and to the inner pane. The washer can be mounted in the door with the inner pane removed. The Inner pane and the washer have different geometric dimensions. However, since the washer is supported on the inner pane, the washer is not held in the door with the inner pane removed and therefore can fall out of the door.

The EP 0 811 806 A1 discloses a door for closing the oven muffle of a baking and roasting oven with a front panel forming plate of glass or vitreous material (outer pane) and one of the oven muffle facing viewing window (inner pane). On the outer pane two columnar, formed from sheet metal profile parts and parallel to each other extending support elements are glued to the inside. An operating handle is fastened to the carrier elements at the top. In one embodiment of this known door, the inner pane is placed on the side facing away from the outer pane surfaces of the support elements from the outside and on the top one hand in the operating handle and on the other hand down in the two corner areas by means of two on one support member releasably secured, laterally cross-retaining corners ( Fig. 9a and 9b ) or along the entire lateral edges by means of two L-shaped, laterally overlapping profiled strips which are detachably fastened to one support element each ( Fig. 8a and 8b ) held. In an alternative embodiment, the inner pane is inserted from above in two holding and / or guide rails of U-shaped cross section attached to the mutually facing inner sides of the carrier elements. Furthermore, embodiments with two viewing panes are also disclosed. The two viewing windows are pulled out of the carrier elements (FIG. 11). There are then provided either two holding or guide rails for one viewing window or a double U-rail for both viewing windows (column 3, lines 48 to 57).

The invention is based on the object, a door for a device, in particular a household appliance, preferably a cooking oven, specify in which up to at least three door panels can be mounted in a simple manner and, for example, for cleaning purposes, also removed in a simple manner can.

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

1. a) eine Außenscheibe (eine an einer Außenseite der Tür angeordnete Scheibe),
2. b) wenigstens zwei mit der Außenscheibe verbundene, vorzugsweise an dieser befestigte, Trägerelemente,
3. c) zwei mit jeweils einem der Trägerelemente verbundene , vorzugsweise an diesem befestigte, Halteelemente, die jeweils
   • c1) aus einem zusammenhängenden Formteil gebildet sind und
   • c2) eine Anzahl, m von wenigstens zwei voneinander getrennten Auflageflächen (Halteflächen) zum Auflegen jeweils einer (einbaubaren oder eingebauten) Türscheibe aufweisen,
   wobei
4. d) wenigstens eine der m Auflageflächen jedes Halteelements zwischen den beiden einander zugewandten Innenseiten der Trägerelemente angeordnet ist,
5. e) wenigstens eine der m Auflageflächen jedes Halteelements an den von der Außenscheibe abgewandten Vorderseiten (Oberseiten) der Trägerelemente angeordnet ist.

The door according to claim 1 is intended for a device, in particular for a cooking oven, and preferably for a household appliance and comprises

1. a) an outer pane (a pane disposed on an outer side of the door),
2. b) at least two support elements connected to the outer pane, preferably attached thereto,
3. c) two connected to one of the support elements, preferably attached to this, holding elements, each
   • c1) are formed from a continuous molding and
   • c2) have a number, m of at least two mutually separate bearing surfaces (holding surfaces) for placing a respective (installable or installed) door glass,
   in which
4. d) at least one of the m bearing surfaces of each holding element is arranged between the two mutually facing inner sides of the carrier elements,
5. e) at least one of the m bearing surfaces of each retaining element is arranged on the front side facing away from the outer disk (upper sides) of the carrier elements.

Through this combination of measures, a door is created, in which a number of at least arbitrarily selectable in principle two door panes can be used. The holding elements are designed so that they can hold or receive the at least two door panes and indeed one or more in the space between the two support elements (washer or shims) and a further above the support members on the side facing away from the outer pane (inner pane). The door is particularly easy to install, because the outer pane and the support elements form a basic unit on which various holding elements can be mounted, the design of the desired number of door panels is adaptable. The entire holding element is a continuous molding and can therefore be mounted in an assembly step on the associated support member. This reduces assembly times for the door.

Advantageous developments and refinements of the door according to the invention will become apparent from the dependent claims of claim 1.

In a first, particularly advantageous embodiment of the door, at least one of the bearing surfaces is formed by the bottom surface of a receiving groove formed in the retaining element. The term receiving groove is to be understood in the broadest sense here and in the following, all structures except the said bottom surface on which the recorded (imported) door edge edge surface, also have lateral boundaries for the door glass, where the recorded door glass strikes or rests , The bottom surface and the lateral boundaries need not be contiguous, even if such a coherent design is preferred and is often understood in the narrower sense of a receiving groove.

Receiving grooves are provided on the holding elements preferably at least for holding those door glass or door glass, which is or are to be arranged in the space between the inner sides of the support elements. The inserted and held in the space between the support elements in the receiving grooves intermediate discs can thus not fall out of the door even when removed or not yet inserted, to be positioned on the front of the support elements inner pane.

The receiving grooves of the holding elements for the intermediate plate or the intermediate plates are now preferably limited to the support elements through lateral boundaries that hold as spacers the inserted door glass at a distance from the support elements. As a result, each washer is thermally decoupled from the carrier elements by the air-filled gap. In addition, the intermediate discs can no longer strike the insides of the support elements and cause unwanted noise.

For the inner pane which can be installed on the front sides of the carrier elements, in a further embodiment receiving grooves are formed in the retaining elements whose lateral boundary arranged between the front side of the respective carrier element and the installed inner pane preferably keeps the inner pane at a distance from the respective carrier element. The spacing of the inner pane from the carrier elements again has the advantages of thermal decoupling and noise reduction.

The holding elements are now advantageously formed with a polymer plastic. With such a plastic practically any shaped body for the holding elements can be produced. In addition, such a plastic is a good heat insulator, so that the heat transfer between the door panes and the carrier elements via the holding elements is kept low.

In a preferred embodiment of the door, the holding elements are hollow profile parts, which are applied to the outer surfaces of the respective carrier elements and are adapted in shape to these associated outer surfaces. As a result, a still stable disc holder is achieved while saving material and weight.

The holding elements are in particular releasably connected to the associated support elements, for example latched, screwed or braced. As a result, doors with different door panes can be constructed based on a common platform with the outer pane and the carrier elements or subsequently changed by simply exchanging the corresponding holding elements. A locking or clamping has the advantage that no additional, separate fastening means such as screws or the like are needed.

For locking, so non-positive connection, or limiting a relative movement between the holding element and the carrier element in at least one direction, which could already be effected by a positive connection only, can now be provided on the holding elements and the support elements corresponding locking means or engagement means, in particular at least one Projection on holding element or carrier element and at least one corresponding recess or opening in the carrier element or holding element, wherein each projection can be brought into engagement in the corresponding recess or opening.

In a particularly advantageous embodiment, each door pane is cantilevered between the holding elements. This further reduces thermal bridges and saves material for the retaining elements.

In a particular embodiment, the holding elements are each arranged at one end of the carrier elements and at the opposite ends of the carrier elements, a carrier strip connected to the two carrier elements is arranged with receiving means for the door panes. The receiving means may also comprise receiving grooves and / or restoring devices. In the embodiment with restoring devices, each restoring device presses the built-in door pane with a restoring force against the associated bearing surfaces in the holding elements. The restoring devices may in particular be formed with one or more elastic elements, i. Elements which are formed as a resilient element and / or formed of a material having a low modulus of elasticity and thereby exert a deformation directed against the deforming force restoring force.

In the case of several bearing surfaces in each retaining element, the bearing surfaces are arranged in at least two different, preferably in pairs, different planes. As a result, with a corresponding design of the door panels with different geometric dimensions - and possibly other possible holding or receiving means for the door windows - a distinctiveness of the door panels during installation or removal can be realized. This ensures that to be installed on a specific position disc, already in production, but especially after removal of the discs for cleaning or replacement in case of damage, actually back to the intended position is installed. Such a clear assignment of door pane to bearing surfaces on the holding elements is particularly advantageous in the embodiments in which door panes made of different materials and / or different physical, especially thermal, properties, in particular different reflectivities for thermal radiation having.

In a preferred development, the door panes can be installed one after the other on the associated bearing surfaces of the holding elements only in a predetermined sequence, preferably from the inside to the outside, and successively expandable in the reverse order. Due to the structural definition of the installation and removal sequences for the door panels no marks on the door panes are required as a reminder. The person who has taken out the door panes for cleaning in the given order need only reinstall the door panes in the reverse order. This is a great mnemonic aid, especially with a number of three or more door panels. If, for example, when reinstalling a door glass was accidentally forgotten, is due to the predetermined assembly sequence and the distinctiveness, possibly by successively removing the already installed door windows, quickly recognize which of the vacant positions the forgotten door glass belongs. In addition, the assembler is automatically caused to remove the discs one by one, so that the security is increased.

The bearing surfaces of each retaining element are generally arranged at least approximately parallel to each other, so that the built-door windows usually come to lie parallel to each other. But it is also possible, at least to position a part of the door panes at an angle to each other or to the outer pane.

In general, the door panes are at least partially translucent, so that a viewing window is formed in the closed by the door device interior.

Particularly advantageous is the design of the door such that the door panels can be installed only by hand and / or can be removed from these, so that no tool for dismantling the door is required for cleaning purposes.

A particularly advantageous use is the door according to the invention for closing the feed opening of a furnace muffle of a household yarn 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.

To further explain the invention, reference is made to the drawings, in each of which an 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

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

FIG. 3

the part according to the door 1 and 2 with two built-in the retaining element door panels in a perspective view,

FIG. 4

the part the door according to the 1 to 3 with three door panes built into the holding element in a perspective view,

FIG. 5

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

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

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

FIG. 8

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

FIG. 9

according to the part of the door FIGS. 6 to 8 with three pressed against the elastic element door panels in a longitudinal sectional view.

Corresponding parts are in the 1 to 9 provided with the same reference numerals.

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

FIG. 1 shows the holding member 7 with no built-in door glass. For each of the three - in FIG. 1 not shown - door panels, the holding member 7 has a receiving groove 72, 74 and 79, respectively. The receiving groove 72 is formed between a first delimiting part 170 and a second delimiting part 171 of the holding element 7, the receiving groove 79 between the second delimiting part 171 and a third delimiting part 172 of the holding element 7 and the third receiving groove 74 between the third delimiting part 172 and a fourth delimiting part 173 of the holding element 7. In each of the receiving grooves 72, 74 and 79 is up to the bottom 174 or 175 or 176 in an insertion along the Arrows labeled ER each insert a door glass. By limiting members 170 to 173 on the one hand and the floors 174 to 176 on the other hand, an inserted door glass is limited in their degrees of freedom so that it is only substantially parallel to the associated receiving groove 72, 74 and 79 movable and otherwise held substantially free of play , For lateral limitation of the movement of the door glass in one direction, a lateral limiting part 73 is furthermore provided on the receiving groove 72. Such lateral boundary parts can also be arranged on the further receiving grooves 74 and 79, preferably in the same direction (on the same side) as the limiting part 73 in the receiving groove 72. In dargestellen embodiment according to FIG. 1 the receiving grooves 72, 74 and 79 for receiving door panels with straight edges, which preferably abut each other at a right angle (rectangular door panes) are formed. But the grooves can also be adapted to a predetermined edge contour of the door windows, which can then be designed in particular concave or convex.

The holding element 7 now has according to the 1 to 4 an at least predominantly cuboid wrapping surface and is open at one of the sides of this cuboid basic shape. An inner side wall of the holding element 7 is denoted by 76 and an outer side wall, whose extension forms the delimiting part 73, with 77. The two side walls 76 and 77 are via a perpendicular thereto top wall 71, which merges in the extension in the limiting part 170, connected. In the in the 1 to 4 illustrated embodiment, the holding member 7 is formed as a hollow profile part and applied with its side facing away from the top wall 71, open side on a support member 5. The wall of the carrier element 5 is the inner wall the retaining element 7 adapted in shape so that an inner side wall 56 of the support member 5 on the inside of the side wall 76 of the support member 7, an outer side wall 57 of the support member 5 on the outer side wall 77 of the support member 7 and an upper side 51 of the support member 5 at the inside of the top wall 71 of the holding member 7 comes to rest. The carrier element 5 is now also formed as a hollow profile part, the walls 51, 56 and 57 extend in the manner of a column substantially parallel to the insertion direction ER, and preferably from a corresponding, in particular U-shaped profiled sheet, preferably a steel sheet formed.

To the side walls 56 and 57 of the support member 5 is followed by flange-shaped fasteners (flange edges) 53 and 50, with which the carrier element 5 via an adhesive 99 on an outer pane 3, which is here a windshield, is attached. A designated 59 shaping (eg embossing) in the fastening part 53 serves to hold a defined distance of the fixing member 53 from the surface of the outer pane 3, so that the adhesive 99 can be applied in a defined thickness. Similar formations 59 are preferably also provided in the opposite fastening part 50. Due to the comparatively large adhesive surface of the adhesive 99 forces are transmitted from the carrier element 5 evenly on the outer pane 3, so that a shattering of the outer pane 3 by thermal or mechanical stresses is practically avoided. Die'Klebeverbindung 99 also ensures a gentle connection of the support member 5 with the outer pane 3 during manufacture. However, it can also be a screw connection, a snap-in connection or another connection of the support member 5 may be provided with the outer pane 3.

The holding member 7 is brought by means of protruding on the inside of its wall projections 78 into corresponding openings 58 in the wall of the support member 5 is engaged, in particular engaged under frictional engagement. In the 1 to 4 Only the engagement connection via the projections 78 and the openings 58 of the outer side wall 77 with the holding element 7 with the outer side wall 57 of the carrier element 5 can be seen. The engagement connection prevents movement of the retaining element 7 relative to the carrier element 5 parallel to the wall (51, 56 and 57). In a frictional locking the connection via the projections 78 and the openings 58 also prevents movement of the holding element 7 away from the carrier element 5, so that the holding element 7 is fixed on the carrier element 5.

In one embodiment, not shown, the retaining element 7 with the carrier element 5, for example, by means of a screw detachably connected or be inextricably linked by means of an adhesive connection.

The holding element 7 is formed as a molded part from a polymer compound (polymer plastic), preferably a thermoplastic or thermosetting plastic, wherein all components, in particular the limiting members 73, 170 to 173 and the bottoms 174 to 176 of the receiving grooves 72, 74 and 79, respectively and the side walls 76 and 77 and the top wall 71 are manufactured in a single manufacturing process, in particular an injection molding process or a drawing process. Without restricting generality, halogenated or non-halogenated hydrocarbon polymers are mentioned as materials for the holding element 7, for example polyethylene, polypropylene, polystyrene, polyurethane, polyvinyl chloride and fluorocarbon materials and also copolymer compounds with these polymers. In the applications at higher temperatures, such as in a Garofentür appropriate temperature-resistant plastics are selected.

When attached to the support member 5 holding member 7, the two closest to the outer pane 3, inner grooves 74 and 79 extend only to the inner side wall 56 of the support member 5 or a front, not shown boundary part of the support member 7. The outer, furthest remote from the outer pane 3 receiving groove 72 extends above the support member 5 over the entire width of the upper side 51 to the limiting part 73, which adjoins directly to the outer side wall 57 of the support member 5. The holding element 7 is thus supported by the carrier element 5 practically over its entire inner surface and thereby kept stable.

According to FIG. 2 is now in the innermost receiving groove 74 a flat door glass 4, of which only a corner is shown in a right angle, introduced in the insertion direction ER. A lower edge (lower narrow side) 45 of the door glass 4 rests on the floor 176 of the receiving groove 74. An upper side (upper flat side) 41 of the door pane 4 bears against the delimiting part 172 and a lower side (lower flat side) 42 abuts the delimiting part 173 of the holding element 7. The measured between the two boundary parts 172 and 173 width of the receiving groove 74 is adapted to the measured between the top 41 and the bottom 42 of the door glass 4 disc thickness, so that the door glass 4 is preferably held without play in the receiving groove 74. A at right angles to the top 41 and bottom 42 and the bottom edge 45 extending lateral edge (lateral narrow side) 46 of the door glass 4 can now rest either on the side wall 56 of the support member 5 or by a lateral boundary member (spacers), not shown. the receiving groove 74 are kept spaced from the side wall 56 of the support member 5. Such an additional lateral boundary part in the receiving groove 74, which is formed again on the molding, reduces the heat conduction between the support member 5 and the door panel 4 and rattling when otherwise possible striking the door panel 4 on the side wall 56 of the support member fifth

According to FIG. 3 is now in addition to already introduced into the receiving groove 74 inner door panel 4, a second door panel 9 is inserted into the receiving groove 79 in the insertion direction ER. The door glass 9 rests on the bottom 175 of the receiving groove 79 as a mating surface (bearing surface) with its lower edge 95 and is supported with the top 91 on the boundary part 171 and the bottom 92 on the boundary part 172. The dimension of the receiving groove 79 between the delimiting parts 171 and 172 corresponds approximately to the thickness of the door panel 9. The lateral edge 96 of the door panel 9 can analogously to the door panel 4 according to FIG. 2 again abut against the side wall 56 of the support member 5 or be held by a side boundary part of the receiving groove 79, not shown, of the side wall 56 of the support member 5 at a distance.

According to FIG. 4 is now a third door glass installed as an inner pane 2 in the retaining element 7. The inner pane 2 is inserted into the receiving groove 72 in the insertion direction ER. In the receiving groove 72, the inner pane 2 is held in four out of six spatial directions by the delimiting part 170, the bottom 174, the delimiting 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 upper side 21 on boundary part 170, the bottom 22 on the boundary part 171 and the lateral edge 26 on the lateral boundary part 73 on. The width of the receiving groove 72 again corresponds approximately to the thickness of the inner pane 2.

In the holding element 7 are thus according to the 1 to 4 three, in particular designed as a rectangular flat body, door panels 4, 9 and 2 spaced apart and substantially parallel to each other can be installed.

FIG. 5 shows now a door with an outer pane 3 and two built-door panes 4 and 9. On a flat side of the outer pane 3 are in a peripheral region a support member 5 with a support member 7 carried therefrom according to the 1 to 4 and in an opposite edge region a correspondingly formed and parallel to the carrier element 5 extending support member 6, which carries a correspondingly formed the holding element 7 holding element 8, attached. The support member 6 and the support member 8 are at least substantially mirror-symmetrical with respect to a parallel to the support elements 5 and 6 and perpendicular to the outer pane 3 directed symmetry plane to the support member 5 and the support member 7 is arranged and formed. The holding element 8 has, analogously to the holding element 7, a cover wall 81 on the upper side 61 of the carrier element 6 and two side walls 86 and 87 resting against the side walls 66 and 67 of the carrier element 6. The inner side wall 86 of the holding member 8 and the inner side wall 76 of the holding member 7 face each other. Also, the holding member 8 has three receiving grooves 82, 84 and 89, which are analogous to the receiving grooves 72, 74 and 79 formed on the holding element 7.

The holding elements 7 and 8 are respectively arranged at the lower ends of the associated carrier elements 5 and 6 respectively. At the ends of the carrier elements 5 and 6 facing away from the holding elements 7 and 8, there is a perpendicular to the carrier elements 5 and 6 extending support bar 10 in mounting areas 155 and 165 attached. In the support strip 10 elastic elements 11, 12 and 13 and optionally also mounting aids 145 and 15 are integrated for the installation of the door panels. Each elastic element 11 to 13 has in each case a bearing surface (mating surface, pressing surface) for each of the door panes 4 and 9 to be mounted or mounted, and the inner pane 2 (not shown). For assembly, the two door panes 4 and 9 are pressed one after the other in the forward direction indicated by EV against the associated bearing surfaces of the elastic members 11 to 13 and centered accordingly, and then subsequently under the action of the force exerted by the elastic members 11 to 13 restoring Forces in the opposite direction ER to be inserted into the associated receiving grooves 74 and 84 or 79 and 89 in the holding elements 7 and 8. Similarly, the in FIG. 5 Not shown inner pane 2 are mounted. To remove the door panels 4 and 9, the installation steps described are just reversed, ie the door panels 9 and 4 are now pressed in the reverse order successively against the restoring force of the elastic members 11 to 13 and then from the grooves 79 and 89 and 74 and 84 taken. The mounting aids 14 and 15 facilitate the positioning of the door panels 4 and 9 on the elastic members 11, 12 and 13 and in the holding elements 7 and 8, but in general have no supporting function for the door panes 4 and 9. The structure and function of elastic members 11, 12 and 13 and the mounting aids 14 and 15 will be described later with reference to FIGS. 6 to 9 described in more detail.

The built innermost door panel 4 and the built-in second-innermost door panel 9 are in the associated receiving groove 74 and 79 of the holding member 7 and the associated receiving groove 84 and 89 of the holding member 8 is held in each one of the two lower corner regions and with its upper edge to the bearing surfaces of the elastic members 11 to 13 and cantilevered therebetween. 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 surface to the door panes 4 and 9, so that thermal losses are kept low by heat conduction in the door. Both door panels 4 and 9 are held between the side wall 56 of the support member 5 and the side wall 66 of the support member 6 and bounded laterally by these in their movement.

The outermost receiving grooves 72 of the holding element 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 FIG. 4 , For spacing the inner pane 2 from the carrier elements 5 and 6, at least one spacer 55 or 65 are respectively arranged on the upper sides 51 and 61 of the carrier elements, which are elastically designed for mechanical damping of the inner pane and reduction of stop sounds, and preferably at least on its inner disk 2 facing surface, in particular by a sliding coating of polyfluoroethylene, are slidably formed so that the inner pane 2 can be moved on them with a low sliding friction along. The Dikken (heights) of the spacers 55 and 65 are now preferably each chosen so large that the spacers 55 and 65 are not fully elastically demolded with built-inner disk 2 and thereby bias the inner pane 2 in their holding devices to noise in the door on a Minimum to reduce.

Elastic materials (elastomers) based on a plastic, a natural rubber or a plastic / natural rubber compound are particularly suitable as elastic materials for the elastic elements 11 to 13 and / or the spacers 55 and 65. A particularly advantageous material is a (solid) silicone (polysiloxane or polyfluorosiloxane), which is stable 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 marketed 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 (in particular fluorine) -carbon compounds are also more temperature-stable than pure hydrocarbons and have very low coefficients of friction. The modulus of elasticity (resistance to deformation) of the elastic material can be selected in particular below about 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 discs 4 and 9 lying in the door interior and the inner pane 2 (not shown) can only be mounted in the door by hand without the aid of tools and can be removed again therefrom. This allows a very simple removal of the door panes 4, 9 and 2, in particular for cleaning purposes or to replace if damaged or broken glass.

The door is provided in all embodiments in general for closing an opening to a device interior and in particular for closing a feed opening of a cooking oven, preferably a household oven, but is not limited to this application.

All door panels 2, 3, 4 and 9 are preferably at least predominantly made of an optically transparent material, in particular a glass or a glass ceramic. With the transparent door panes 3, 4, 9 and 2, a large-scale viewing window of the door is then formed, in order to be able to look into the interior of the oven closed by the door, in particular the oven muffle interior.

In particular, in applications where the door must also ensure a certain thermal insulation of its closed interior of the unit from the outside, the door panels of the door often have different physical and in particular thermal properties. If, for example, in a Garofen, the interior is at a relatively high temperature (for example, 300 ° C when cooking and even up to 500 ° C in a pyrolytic cleaning process), then arises at the Stefan-Boltzmann law at these high temperatures, a comparatively high proportion of heat in the form of heat radiation. In order to keep this heat radiation in the device interior, therefore, preferably the door pane closest to the interior of the device, here the inner pane 2, and possibly also the other door panes, here the door pane 9 and possibly also the door pane 4, will be reflected on its surface with heat radiation Coating provided. Furthermore, the inner pane 2 must withstand a higher temperature than the more outer door panels 9 and 4, so that usually different temperature-resistant materials for the inner pane 2, the door panel 9 and the door panel 4 are selected.

For a desired optimal thermal insulation effect, it is therefore necessary to always unmistakably mount the door panels 2, 9 and 4 in the respective predetermined positions.

The inner pane 2 is now due to their different widths to the door panes 9 and 4, measured perpendicular to the directions EV and ER, and the corresponding outwardly extending receiving grooves 72 and 82 of the holding elements 7 and 8 not with one of the two door panes 9 and 4th so that in particular it can also have the same height, measured parallel to the directions ER and EV, as one of the door panes 9 or 4. For this reason, the two grooves 72 and 79 according to the 1 to 4 (and correspondingly the receiving grooves 82 and 89 in the holding element 8) of the holding element 7 in a plane, ie at the same height extend.

In order to distinguish the door windows 4 and 9 from each other, according to the 1 to 5 the door windows 4 and 9 in their heights, parallel to the direction EV and ER emessen, of different sizes, and the elastic members 11, 12 and 13 and the associated grooves 79 and 89 and 74 and 84 of the holding elements 7 and 8 respectively different distances from each other, which are adapted to the dimensions of the door windows 4 and 9. The receiving grooves 74 of the holding member 7 and 84 of the holding member 8 for the door glass 4 are to continue upwards the differences in the heights of the door panels 4 and 9 should not be too large to maintain a sufficiently large viewing window and are generally between 2 mm and 40 mm, in particular between 5 mm and 20 mm, chosen. As a result of these measures, the lateral surfaces of the door panes 4, 9 and 2 increase from the inside to the outside. The innermost door panel 4 is thus smaller than the door panel 9, while the door panel 9 is again smaller than the inner pane. 2

If you want to additionally ensure that any or all of the door panels 2, 4 and 9 always with the same surface facing inwards (or outwards), the corresponding holding devices in a further development, not shown, for example, by asymmetrical design of the grooves 72, 79 and 74 of the holding member 7 compared to the retaining grooves 82, 89 and 84 in the support member 8, and the door panels 2, 9 and 4 are adapted to each other so that the flat sides of the door panels 2, 4 and 9 can not be reversed.

FIG. 6 now shows a section of the door according to FIG. 5 in its upper right corner area. The door panels 4 and 9 are not installed and therefore not shown. As a result, the elastic member 13 is practically completely visible. The elastic element 13 is formed with a shaped profile part, which has a continuous wall 30 and a plurality of chambers (cavities, intermediate spaces) 31 which are separated from each other by a respective portion (partition wall) of the wall 30. In the illustrated embodiment, the chambers 31 are open at the sides and limited only parallel to the insertion direction EV of the wall 30. The wall 30 of the elastic member 13 includes individual, under certain Angles directed towards each other, in the unloaded state substantially straight and interconnected webs, so that the chambers 31 have a generally polyhedral shape. The elastic element 13 is inserted or clamped in an associated receiving pocket 23 which is formed on the carrier strip 10 and can be easily removed therefrom. At the rear area, seen in the insertion direction EV, the wall 30 of the elastic element 13 is flat and bears against a rear flat side of the carrier strip 10. On the opposite side, which is opposite to the direction EV, the wall 30 is stepped and has three planar bearing surfaces 32, 39 and 34 with the vector EV as the normal vector and oblique flanks 33 between the support region 32 and the support region 39 and 35 between the support area 39 and 34 and in connection with the support surface 34 still another flank 36. There are now the support surface 34 for the door glass 4, the support surface 39 is provided for the door glass 9 and the support surface 32 for the inner pane 2. The flanks 36, 35 and 33 are for stabilization and as a guide for the door windows advantage. This design of the elastic element 13 as a hollow profile part with a plurality of chambers, the spring action against a solid body of the same (elastic) material is significantly increased. In a correspondingly highly elastic material, however, a solid body can also be used as the elastic element 13.

Another mounting aid is designated by 14 and essentially comprises three mutually parallel and spaced-apart flat guide members 141, 142 and 143. The carrier strip 10 is connected in its edge region with the edge region of the support member 5 in a Befestigungsbeeich 155, for example screwed or clipped. The carrier element is bonded again in the region of the flange edge 53 with the outer pane 3.

According to FIG. 7 is now pressed as the first door glass, the door glass 4 in the insertion direction EV on the associated support surface 34 of the elastic member 13 with a certain force. The force exerted on the elastic element 13 by the door pane 4 leads to a deformation underneath the areas of the wall 30 which lie behind the support area 34, which is indicated by a curvilinear deformation of the bars indicated by dashed lines. The two guide elements 142 and 143 of the mounting aid 14 serve as a means for positioning the door glass 4, but are generally not at the door glass 4 at inserted door glass 4. If the door glass 4 has been pressed by a predetermined insertion length in the direction of the insertion direction EV against the elastic member 13, it can on the opposite side according to FIG. 5 are inserted into the receiving grooves 74 and 84 of the holding elements 7 and 8 and is then pressed by the restoring force of the elastic member 13 (and the other elastic members 11 and 12) in these grooves 74 and 84, respectively. Preferably, the elastic member 13, the door panel 4 and the receiving grooves 74 and 84 are coordinated so that the door panel 4 in the fully installed state, when inserted into the receiving grooves 74 and 84, is held under a certain voltage, the elastic element 13 is therefore under a certain bias and is not relieved of force and thus still exerts a restoring force on the door glass 4 in its installed state. Thereby, the door glass 4 is stably held between the elastic members 11 to 13 on the one side and the receiving grooves 74 and 84 on the other side and can not rattle or even fall out.

FIG. 8 now shows the mounting of the next door panel 9 on the elastic element 13. The door panel 9 is analogous to the door glass 4 according to FIG. 7 again pressed in the insertion direction EV against the associated receiving surface 39 of the elastic member 13. To introduce the door panel 9, the guide elements 141 and 142 are now used as guide aids.

FIG. 9 illustrates in a longitudinal section formed as a hollow profile member elastic member 13 with three built-in support surfaces 34, 39 and 32 door panels 4, 9 and 2. The deformation of the webs of the wall 30 by the introduced under pressure and held door panels 4, 9 and 2 off the relieved situation is indicated in the drawing. By this elastic deformation, the elastic member 13 exerts a restoring force against the insertion direction EV, through which the door panels 4, 9 and 2 are pressed down.

The different heights of the holding devices for the door panes 2, 4 and 9 can in all embodiments by stepped mutually arranged bearing surfaces on the elastic members 11, 12 and 13 or on the holding elements 7 and 8 in conjunction with at the same height or also arranged stepped support surfaces the other side, ie on the holding elements 7 and 8 and the elastic members 11, 12 and 13, are realized

In the 1 to 9 the holding elements 7 and 8 on the one hand and the elastic elements 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 is held individually and independently of the other door panes. Due to the special design of the elastic elements 11 to 13 is increased by the deformation of the elastic member 13 in the assembly order of the door panes 4, 9 and finally 2 each of the restoring force for the individual door panes, so that even in the much thinner design of the elastic member 13 in the area of the support surface 32 through the door panes 4 and 9 caused bias a sufficient restoring force for the door glass 2 zeitigt. The door windows 4, 9 and 2 are always installed in the specified order from the inside to the outside and expand from outside to inside.

A distinctiveness of the door panes 2, 4 and 9 can additionally or alternatively also be achieved by different thicknesses of the door panes and the associated receiving grooves in the holding elements 7 and 8.

Claims (22)

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

   a) an outer pane (3),

   b) at least two support elements (5, 6) connected to the outer plate (3),
   in which

   c) in each case a holding element (7) formed from a structural part having a number m of at least two support surfaces (72, 74, 79) separated from one another for applying in each case a door pane (2, 4, 9) is connected to two of the support elements (5, 6),

   d) at least one of the m support surfaces (72, 74, 79) of each holding element (7) is arranged between the two inner sides of the support elements (5, 6) facing one another,

   e) at least one of the m support surfaces (72, 74, 79) of each holding element (7) is arranged on the front sides of the support elements (5, 6) facing away from the outer pane (3).
2. Door according to claim 1, in which at least one of the support surfaces (72, 74, 79) is formed by the base surface of a receiving groove formed in the holding element (7) and into which the door pane (2, 4, 9) can be introduced.
3. Door according to claim 2, in which at least the support surfaces (72, 74, 79) of each holding element (7) arranged between the inner sides of the support elements (5, 6) are formed by in each case a base surface of a receiving groove formed in the holding element (7) and into which the associated door pane (2, 4, 9) can be introduced.
4. Door according to claim 3, in which the receiving grooves of the holding elements (7) arranged between the inner sides of the support elements (5, 6) are limited towards the support elements (5, 6) by lateral restrictions which hold the introduced door pane (2, 4, 9) at a distance from the support elements (5, 6).
5. Door according to one of claims 2 to 4, in which the support surfaces (72, 74, 79) of the holding elements (7) arranged on the front sides of the support elements (5, 6) facing away from the outer pane are formed in each case with the base surfaces of receiving grooves in each case formed in the holding elements (7) and the restricting wall (73) of the receiving groove adjacent to the front side of the respective support element holds the door pane (2, 4, 9) introduced into the receiving groove at a distance from the respective support element (5, 6).
6. Door according to claim 5, in which the receiving grooves of the holding elements (7) arranged on the front sides of the support elements (5, 6) have lateral restrictions for the door pane (2, 4, 9) on the outer sides facing away from one another.
7. Door according to one of the preceding claims, in which the holding elements (7) are formed from a polymer plastic.
8. Door according to one of the preceding claims, in which the holding elements (7) are hollow profile parts which are applies to the outer surfaces of the respective support elements (5, 6) and are adapted in shape to these associated outer surfaces.
9. Door according to one of the preceding claims, in which the holding elements (7) are connected, in particular locked, screwed or clamped, releasably to the associated support elements (5, 6).
10. Door according to one of the preceding claims, in which each holding element (7) has at least one projection (78) and/or at least one recess or opening and each support element (5, 6) has at least one corresponding recess (58) or opening or at least one corresponding projection, wherein each projection can be engaged in the corresponding recess or opening and hence a relative movement between holding element (7) and support element (5, 6) can be prevented in at least one direction.
11. Door according to one of the preceding claims, in which each door pane (2, 4, 9) resting on the support surfaces (72, 74, 79) is self-supporting between the holding elements (7).
12. Door according to one of the preceding claims, in which the holding elements (7) are arranged in each case on one end of the support elements (5, 6) and a support strip connected to the two support elements with receiving means for the m door panes (2, 4, 9) is arranged on the opposite ends of the support elements (5, 6).
13. Door according to one of the preceding claims, in which the support surfaces (72, 74, 79) of each holding element (7) are arranged in at least two different planes, preferably in planes in pairs which are different from one another.
14. Door according to one of the preceding claims, in which the support surfaces (72, 74, 79) of each holding element (7) are arranged at least approximately parallel to one another.
15. Door according to one of the preceding claims, in which in each case one door pane (2, 4, 9) is installed on at least one support surface (72, 74, 79) of each holding element (7).
16. Door according to claim 15, in which in each case one door pane (2, 4, 9) is installed on each support surface of each holding element (7), the door panes (2, 4, 9) having geometric dimensions which are different to one another and each of the door panes (2, 4, 9) can be installed and dismantled again on in each case only one of the support surfaces (72, 74, 79) of each holding element (7).
17. Door according to one of the preceding claims, in which the door panes (2, 4, 9) can be installed only in a preset sequence, preferably from inside to out, one after another on the assigned support surfaces (72, 74, 79) of the holding elements (7) and can be dismantled in the reverse sequence one after another.
18. Door according to one of the preceding claims, in which the installed door panes (2, 4, 9) are arranged in each case at least approximately parallel to a preset installation plane.
19. Door according to one of the preceding claims, in which the door panes (2, 4, 9) consist of different materials and/or have different physical, in particular thermal, properties, in particular different reflectivities for heat radiation.
20. Door according to one of the preceding claims, in which the door panes (2, 4, 9) are at least partly optically transparent.
21. Door according to one of the preceding claims, in which the door panes (2, 4, 9) can be installed and/or dismantled on the associated support surfaces (72, 74, 79) without a tool using only the hand.
22. Cooking oven having

    a) an oven liner with a loading opening for introducing cooking material and

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

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