EP1076210A2 - Door for a device, particularly an oven, with elastic return bodies for holding the plates - Google Patents

Abstract

The door for a cooking oven has elastomeric retaining components (11 -13) along one side and counter-surfaces (72, 74, 79) on the other. A door plate (4, 9) is held between the two sets of components by the pressure of the deformed retaining components acting on the counter-surfaces. An Independent claim is included for a cooking oven including a door as described above.

Description

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

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 fixing these disks in A number of possibilities are known for the door.

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, if necessary, further plates, such as additional radiation protection plates, for example made of perforated sheet metal or the like, can be inserted.

EP 0 811 806 A1 discloses a door for closing the oven muffle of a baking and roasting oven with a plate made of glass or glass-like material (outer pane) forming the door front and a viewing pane (inner pane) facing the oven muffle. On the inside of the outer pane, two column-shaped support elements made of sheet metal profile parts and running parallel to one another are glued. An actuating handle is attached to the support elements at the top. In one embodiment of this known door, the inner pane is placed on the surfaces of the support elements facing away from the outer pane and on the one hand at the top in the actuating handle and on the other hand at the bottom in the two corner areas by means of two laterally overlapping holding corners which are detachably fastened to a support element (FIGS. 9a and 9b) or along the entire lateral edges by means of two L-shaped, laterally overlapping profile strips (Fig. 8a and 8b) detachably fastened to a carrier element. In an alternative embodiment, the inner pane is introduced from above into two holding and / or guide rails which are attached to the mutually facing inner sides of the carrier elements. Embodiments with two viewing windows are also disclosed. The two viewing windows are held on the support elements so that they can be pulled out (FIG. 11). Either two holding or guiding rails are then provided for each viewing window or a double U-rail for both viewing windows (column 3, lines 48 to 57).

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 steel 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.

EP 0 900 987 A1 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 on one side two holding elements fastened to the carrier elements and on the other side a resetting device which presses the inner pane in the installed state into the two holding elements with a restoring force. The resetting device comprises either a spring element which is formed from a metal sheet formed into a spring tongue and is arranged in a door handle strip attached to the carrier elements from above, or a pneumatic or electromagnetic device. Between the outer pane and the inner pane and the two carrier elements, an intermediate pane can be inserted, which has at least one frame element made of plastic on its edge 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.

DE 197 05 120 A1 discloses an oven door for closing an oven muffle of an oven with a frame-like support for enclosing an inner pane, an outer pane and an intermediate pane. The frame-like carrier comprises a frame-like filler plate and lateral edging strips, which form a frame wall that borders a door interior. The frame wall and the filler plate form an integral frame profile part of the frame-like carrier. A bracket is glued to the outer pane by means of an adhesive, to which the frame profile part is fastened by means of a screw. The inner pane is glued to a support surface of the frame profile part facing away from the outer pane. A spacer element, which extends into the interior of the door and has a support surface, is formed on the frame profile part. The washer rests on one side on the contact surface of the spacer element. On the opposite side, the washer rests on the retaining washer on the outer pane via an elastic element. When the frame profile part is screwed to the retaining bracket of the outer pane, the intermediate pane is clamped on its two flat sides between the contact surface of the spacer and the elastic element. To protect the outer pane and the intermediate pane, an elastic element can also be arranged on the support surface provided for the outer pane and on the support surface provided for the intermediate pane. The resilient elements on the flat side of the washer have no holding or carrying function for the washer, ie they are not suitable for applying the forces required to compensate for the weight of the washer. Rather, these holding forces are generated by screwing the frame profile part to the holding bracket of the outer pane. Materials for the elastic element are not disclosed. Furthermore, the inner pane of this oven door known from DE 197 05 120 A1 cannot be removed.

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 at least one door pane in simpler Be mounted in a manner and, for example for cleaning purposes, can also be removed in a simple manner.

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

a) wenigstens einen Rückstellkörper (elastisches Element) aus einem Elastomer (elastische Polymerverbindung),

b) wenigstens eine dem Rückstellkörper beabstandet gegenüberliegende Aufnahmenut und

c) wenigstens eine Türscheibe,
wobei

d) die Türscheibe durch die rückstellende, zur wenigstens einen Aufnahmenut hin gerichtete Kraft des elastisch verformten Rückstellkörpers in die Aufnahmenut gedrückt ist.

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

a) at least one resetting body (elastic element) made of an elastomer (elastic polymer compound),

b) at least one receiving groove spaced opposite the restoring body and

c) at least one door pane,
in which

d) the door pane is pressed into the receiving groove by the restoring force of the elastically deformed return body directed towards at least one receiving groove.

The door pane is therefore under the effect of the return body applied force non-positively on the inner surface the receiving groove and is thereby with their entire Weight between the reset body and the receiving groove kept safe. Even if the door window with its entire Press the weight against the return body or bodies the restoring force would be the restoring body prevent the door glass from the or the grooves slips out. Other holding means for the door window except for the at least one receiving groove and the at least one a reset body is no longer necessary.

The use of an elastomer as the material for the restoring body or the spring steel used according to DE 26 54 017 A1 or EP 0 900 987 A1 has the advantage that the door pane is kept soft and mechanically damped (soft storage) in the door and thereby unwanted rattling noises or vibrating noises in the door, especially when opening and closing or when the door is shaken, can be significantly reduced. Another advantage of the elastomer compared to spring steel is the significantly better thermal insulation properties due to the significantly lower thermal conductivity of the elastomer compared to steel. The better thermal insulation is particularly advantageous if there are large temperature differences between an interior of the appliance closed by the door and the exterior, as is the case, for example, with a heated interior of the appliance, in particular a oven, or a cooled interior of the appliance, in particular a refrigerator and / or freezer is.

To assemble the door pane in an area where it has a larger dimension than the distance between the resiliently demolded, i.e. force-relieved, return body and the receiving groove, with an edge surface (narrow side) below against the elastic deformation of the restoring body the reset body until it contacts the opposite Edge surface can be inserted into the receiving groove. After insertion into the receiving groove, i.e. if the door window strikes a counter surface in the receiving groove, is the Reset body is still elastically deformed so that the Door pane with the restoring force of the Reset body pressed against the counter surface of the receiving groove is, that is. To disassemble the door pulled it out of the receiving groove against the reset body and then taken out of the door. The elastomer of the or the restoring body now has another because of its softness Advantage that the edge surface resting on the restoring body the door pane when assembling or disassembling it Damage or scratching is protected.

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

In a first, particularly advantageous embodiment the restoring body is a hollow profile body. Through this additional Can measure against a massive return body larger deformations with lower deformation force and thus larger insertion paths (larger stroke) and / or greater restoring forces can be achieved. Preferably the hollow profile body has several chambers, which are separated from each other by a coherent wall are. Such a body can with regard to the resetting Power through the arrangement and design of the chambers as well as the wall thickness can be optimized and still from the elastomer as a molded body in a manufacturing process become. An embodiment has proven to be expedient, at least one of the chambers after at least one, preferably not in the direction of the resetting Force showing, side is open. In particular, the wall the reset body each chamber only in the direction the restoring force and in the opposite direction limit the sides, so that the chambers on the other sides are open, so none of them work on the sides Lateral forces that may cause the return body to the side could move. But it is also a closed embodiment possible with the then existing side walls when deforming an additional force against the deformation produce.

Furthermore, it is expedient for the wall of the restoring body with individual, in the relieved state essentially to form flat and interconnected webs, which are preferably directed towards each other at predetermined angles are. By the orientation determined by these angles the webs to each other and relative to the contact surfaces can be the restoring force and / or the deformation path (Insertion path) can be set.

An advantageous embodiment is characterized in that that each reset body is releasably held in the door and can be easily assembled and replaced. In particular are receptacles for each restoring body provided, in which the reset body is preferably inserted or is pinched and out of which it is again is removable.

In a particularly advantageous embodiment, everyone is Reset body provided for more than one door pane and has several on its front, preferably in Force-relieved state of the restoring body essentially parallel support surfaces for one door pane each.

The reset body preferably has on the front flanks connecting two contact surfaces (Connecting walls), which in the relieved state of the Return body at a right angle (90 °) different angles to the contact surfaces are directed. These flanks are due to their oblique orientation the contact surfaces are clearly distinguishable and serve additional purposes as guide surfaces that the assembly of the door glass facilitate.

In a further embodiment, the reset body is on the back facing away from the contact surfaces essentially just trained and preferably with the entire Back supported on a counter surface of the receiving means.

The contact surfaces of each reset body for the different Door panes can be used in a relaxed state Level. However, it is useful if at least two of the contact surfaces of the restoring body in its force-relieved Condition not arranged on a common level are.

The contact surfaces of the restoring body are preferably in levels different from each other in pairs. If you now the Associated recording grooves trained and arranged so that the different distances between the contact surfaces be exactly balanced. so you achieve an ergonomic extremely advantageous unmistakability of the door panes at Installation. This ensures that one, for example with a coating for optical or thermal reasons or tinted, in a certain position The door pane to be installed is actually back on the intended one Position is installed. This is an advantage already in manufacturing, but especially after removing the panes for cleaning or to replace if damaged at the operating site of the device. , In cases where the door has more contact surfaces and has grooves as door panes, so not all possible positions are equipped with washers also the accidental installation of a removed door window prevented in one of the positions to be kept clear. By doing each door pane is held individually in the door, cannot by removing a door window another door window be released and accidentally fall out of the door. The danger damage to the door panes or an injury to the the person who removes the first door pane (assembly person) is significantly reduced.

This is particularly advantageous that the door panes only in a predetermined order Can be installed in the door and removed in the reverse order are. The order in which the door panels in the door installed, preferably runs from the inside out, so that the innermost door pane must be installed first. By structuring the installation and removal sequence there are no markings on the door panes Door panes required as a reminder. The person, who the door panes for cleaning in the specified order has taken out, the door panes need only in the reverse Reinstall order. This is, especially at a number of three and more door panes, a large mnemonic Help. In addition, the assembly person becomes automatic causes to take out the disks one by one, so that security is increased. The unique assignment the door panes to those from the associated reset bodies and the associated receiving grooves formed holding devices is particularly advantageous if the door panes are off different materials exist and / or different physical, in particular thermal, properties, especially different reflectivities for heat radiation, have and for these reasons the order of Door panes in the door is important.

If several door panes are now installed in the door, so they are preferably at least approximately parallel to one another are arranged.

The design of the door in which each door pane can only be installed by hand without tools and / or is expandable. This is particularly the case if those formed with the reset bodies and the receiving grooves Brackets with the door window freely accessible from the outside are or only by means of construction elements that can be released by hand the door is locked. The brackets according to namely allow the invention itself by its simple Set up a purely manual installation and removal of the Door windows.

In an advantageous door structure, an outer pane is provided, attached to the at least two support elements are. There is one on each of the carrier elements Holding element arranged on the grooves for the Door pane or the door panes are formed. The outermost the door window is now preferably in the installed state on the side facing away from the outer pane two carrier elements at a distance from the carrier elements or held on top of it. The other door panes are, however, preferably between the support elements at a distance from the support elements or to each other facing side surfaces of the support elements are held adjacent.

The modulus of elasticity of the elastomer is preferably selected below approximately 5000 N / mm ² , preferably below 2000 N / mm ² .

A particularly suitable material for the elastomer of the The restoring body is a silicone, in particular polysiloxane or a polyfluorosiloxane, as a pure polymer or in combination with other polymers (copolymers). Silicone is very easy to process and temperature resistant.

A particularly advantageous embodiment of the invention can can be achieved if at least one additional spring element is provided. Depending on the design of the reset body or bodies it can happen that the reset body too have little restoring force and / or return path in order to easily insert or remove a glass pane can. In this case e.g. the reset body in Area of the disc can be made weaker to the assembly and disassembly of the pane. The weaker executed body would then be too low a holding force for the disc. With an additional spring element can then the restoring force and associated with it the holding function can be guaranteed. That or the spring elements can be easily made using metal leaf springs realize. Depending on the requirement, the additional Spring elements on one or more of the washers act. By means of one or more appropriately designed Metal springs is a desired holding force at the factory adjustable. Sufficient spring travel is associated with this ensures a particularly easy and safe installation and disassembly of the door pane.

In general, the door panes are at least partially translucent, so that with them a viewing window for insight is formed in the interior of the device.

The door is used in a particularly advantageous manner of the invention for closing the loading opening of a Oven muffle of a cooking oven, especially 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

den Teil der Tür mit einem zusätzlichen Spannelement (Metallblattfeder) und einer gegen das elastische Element gedrückten Türscheibe in einer perspektivischen Ansicht.

FIG 11

den Teil der Tür gemäß FIG 10 mit drei gegen das elastische Element gedrückten Türscheiben und der an einer Türscheibe anliegenden gespannten Metallblattfeder in einer Längsschnittdarstellung.

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

the part of the door with an additional tensioning element (metal leaf spring) and a door pane pressed against the elastic element in a perspective view.

FIG 11

the part of the door according to FIG 10 with three door panes pressed against the elastic element and the tensioned metal leaf spring resting on a door pane in a longitudinal sectional view.

Corresponding parts are shown in FIGS. 1 to 11 provided the same reference numerals.

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 window. 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 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, are 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 in the receiving groove 72, may be arranged. in the illustrated embodiment according to FIG 1 are the grooves 72, 74 and 79 for holding 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 adjusted, 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 profile part 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 of 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 the 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 direction of entry ER, and preferably from a corresponding, in particular U-shaped, profiled sheet, preferably one, in general enamelled, sheet steel, formed.

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 carrier element 5 evenly on the outer pane 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 is provided 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 floors 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 non-detachably 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 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 limiting 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 carrier element 5 practically over its entire length Supported inner surface and thus kept stable.

According to FIG. 2, a level is now in the innermost receiving groove 74 Door pane 4, of which only one tapering at a right angle Corner is shown, inserted in the insertion direction ER. A lower edge (lower narrow side) 45 of the door window 4 lies on the bottom 176 of the receiving groove 74. An upper side (upper flat side) 41 of the door pane 4 lies on the limiting part 172 and a bottom (lower Flat side) 42 on the limiting part 173 of the holding element 7 on. The between the two boundary parts 172 and 173 measured width of the receiving groove 74 is the between the Top 41 and bottom 42 of the door pane 4 measured Adjusted pane thickness so that the door pane 4 preferably is held without play in the receiving groove 74. An im right angle to the top 41 and bottom 42 and to lower edge 45 lateral edge (lateral Narrow side) 46 of the door pane 4 can now either on the Side wall 56 of the support element 5 abut or by one lateral boundary part, not shown (spacer) the receiving groove 74 from the side wall 56 of the carrier element 5 are kept spaced. Such an additional lateral limiting part in the receiving groove 74, the is molded onto the molded part again, reduces heat conduction between the carrier element 5 and the door pane 4 and rattling noises when striking the Door pane 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 Recording 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 dimension of the receiving groove 79 between the boundary parts 171 and 172 correspond approximately to the thickness the door window 9. The lateral edge 96 of the door window 9 can be analogous to the door pane 4 according to FIG 2 again on the side wall 56 of the support element 5 or from one lateral boundary part of the receiving groove, not shown 79 from the side wall 56 of the carrier element 5 at a distance be kept.

According to FIG 4 is now a third door pane as an inner pane 2 installed in the holding element 7. The inner pane 2 is in the receiving groove 72 inserted in the insertion direction ER. In the holding element 7 is the inner pane 2 in four out of six Spatial directions held by 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 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 corresponds again about the thickness of the inner pane 2.

According to FIGS. 1 to 4, there are three, in particular, in the 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 corresponds to a 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 member 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 face each other. The holding element 8 also has three grooves 82, 84 and 89, which are analogous to 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 Reset body (elastic elements) 11, 12 and 13 and if necessary also assembly aids 14 and 15 for assembly of the door panes integrated. Any elastic return body 11 to 13 each have a contact surface (counter surface, Pressing surface) for each of the to be assembled or assembled Door panes 4 and 9 and the - not shown - inner pane 2 on. The two door panes 4 and 9 in succession, first in the direction designated EV directed insertion direction against the associated contact surfaces the elastic return body 11 to 13 pressed and centered accordingly, and then under the effect of the elastic return bodies 11 to 13 exerted restoring forces in the opposite Direction ER in the associated grooves 74 and 84 or 79 and 89 inserted in the holding elements 7 and 8 to become. Likewise, the one not shown in FIG. 5 can also be used Inner pane 2 can be mounted. To remove the Door panes 4 and 9 are the assembly steps described just the other way round, i.e. the door panes 9 and 4 are now in the reverse order one by one against the resetting Force of the elastic return body 11 to 13 pressed and then from the grooves 79 and 89 or 74 and 84 taken. The assembly aids 14 and 15 facilitate that Positioning the door panes 4 and 9 on the elastic Reset bodies 11, 12 and 13 and in the holding elements 7 and 8, but generally have no supporting function for the door panes 4 and 9. The structure and function of the elastic return body 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 and with their upper edge the contact surfaces of the elastic restoring bodies 11 to 13 held and self-supporting in between. The holding elements 7 and 8 and the elastic return body 11 to 13 form together two holding devices for the two door panes 4 and 9 with a comparatively small contact area the door panes 4 and 9, so that thermal losses through Heat conduction in the door can be kept low. Both door windows 4 and 9 are between the side wall 56 of the support member 5 and the side wall 66 of the carrier element 6 and laterally limited by these in their movement.

Teflon"), gleitfähig ausgebildet sind, damit die Innenscheibe 2 auf ihnen mit einer geringen Gleitreibung entlang bewegt werden kann. Die Dicken (Höhen) der Abstandhalter 55 und 65 sind nun vorzugsweise jeweils so groß gewählt, daß die Abstandhalter 55 und 65 bei eingebauter Innenscheibe 2 nicht vollständig elastisch entformt sind und dadurch die Innenscheibe 2 in ihrer Halteeinrichtungen vorspannen, um Geräusche in der Tür auf ein Minimum zu reduzieren.The outermost receiving grooves 72 of the holding element 7 and 82 of the holding element 8 as well as the elastic return bodies 11 to 13 also form a holding device for an inner pane 2, not shown, as in FIG. 4. To space the inner pane 2 from the carrier elements 5 and 6 are on At least one spacer 55 and 65, respectively, are arranged on the top sides 51 and 61 of the carrier elements 5 and 6, which are designed to be mechanical for damping the inner pane and reducing impact noises, and preferably at least on its surface facing the inner pane 2, in particular by a sliding coating Polyfluoroethylene (e.g.

Teflon "), are designed to be slidable so that the inner pane 2 can be moved along them with a low sliding friction. The thicknesses (heights) of the spacers 55 and 65 are now preferably chosen so large that the spacers 55 and 65 with the inner pane installed 2 are not completely elastically removed from the mold and thereby pretension the inner pane 2 in its holding devices in order to reduce noise in the door to a minimum.

Elastic polymers (elastomers) based on a plastic, a natural rubber or a plastic / natural rubber compound are now provided as elastic materials for the restoring bodies 11 to 13 and / or the spacers 55 and 65. 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 panels 3, 4, 9 and 2 is then a large area Viewing window of the door formed in order from the Door closed device interior, in particular 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 Can 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 return body 11, 12 and 13 and the associated grooves 79 and 89 and 74 and 84 of the holding elements 7 and 8 accordingly have different distances from each other adapted to the dimensions of the door panes 4 and 9 are. The receiving grooves 74 of the holding element 7 and 84 of the Retaining element 8 for the door pane 4 are further to this offset above the insertion direction ER as the receiving grooves 79 and 89 for the door window 9. The differences at the heights of the door panes 4 and 9 should not be too big can be selected 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. By these measures take the lateral surfaces of the door glass 4, 9 and 2 from the inside out. The innermost door pane 4 is therefore smaller than the door window 9, while the door window 9 is in turn smaller than the inner pane 2.

Do you also want to ensure 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 be 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 return body 13 is practically entirely visible. The reset body 13 is with an elastomer molded profile part formed which is a coherent wall 30 and has several chambers (cavities, gaps) 31, which each through a partial area (partition) Wall 30 are separated from each other. In the illustrated embodiment the chambers 31 are open on the sides and limited only parallel to the insertion direction EV by the wall 30. The wall 30 of the elastic restoring body 13 includes individual, directed at certain angles to each other, in the relieved state essentially straight and with each other connected webs, so that the chambers 31 a generally polyhedral in shape. The elastic Reset body 13 is in an associated receiving pocket 23, which is formed on the carrier strip 10, inserted or pinched and can be easily removed from this become. At the rear area, seen in the insertion direction EV is the wall 30 of the elastic restoring body 13 flat and lies on a back flat side the support bar 10. On the opposite side, the opposite to the direction EV, the wall is 30 stepped and has three flat contact surfaces 32, 39 and 34 with the vector EV as normal vector and oblique extending flanks 33 between the support area 32 and the support area 39 and 35 between the support area 39 and 34 and following the bearing surface 34 another further edge 36 on. There are now the bearing surface 34 for the door pane 4, the support surface 39 for the door pane 9 and the bearing surface 32 is provided for the inner pane 2. The flanks 36, 35 and 33 are for stabilization and as an aid for guiding the door panes. By this formation of the elastic return body 13 as The hollow section part with several chambers becomes the spring action compared to a solid body made of the same (elastic) Material significantly increased. With one accordingly highly elastic material can also be a solid body can be used as an elastic return body 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 the first door pane in the insertion direction EV on the associated contact surface 34 of the elastic return body 13 with a certain Force pressed. The on the elastic return body 13th force exerted by the door pane 4 leads to deformation below the areas of the support area 34 the wall 30, which is indicated by a dashed line, curvilinear deformation of the webs is indicated. The serve two guide elements 142 and 143 of the assembly aid 14 thereby as a means of positioning the door pane 4, are, however, generally with the door pane 4 inserted not on the door pane 4. If the door window 4 by one specified insertion length in the direction of the insertion direction EV been pressed against the elastic return body 13 is, it can on the opposite side according to FIG 5 in the receiving grooves 74 and 84 of the holding elements 7 and 8, respectively and will then be from the restoring force the elastic return body 13 (as well as the other elastic Reset body 11 and 12) in these grooves 74 or 84 pressed. Preferably each is elastic Reset body 13, the door glass 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 return body 13 under a certain bias and is not relieved of force is and therefore a restoring force on the door window 4 also exercises in their installed state. Thereby the door pane 4 becomes stable between the elastic return bodies 11 to 13 on one side and the grooves 74 and 84 kept on the other side and can do not rattle or fall out.

8 shows the assembly of the next door pane 9 on elastic return body 13. The door window 9 becomes analog 7 again in the direction of insertion EV against the associated receiving surface 39 of the elastic Reset body 13 pressed. For the introduction of the door window 9 the guide elements 141 and 142 now serve 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.

1 to 9 form the holding elements 7 and 8 on the one hand and the return body 11 to 13 on the other hand together five holding devices for the three door panes 4, 9 and 2, each door pane, 2, 9 and 4 individually and independently is held by the other door panes. Through the special training of the elastic return body 11 to 13 is caused by the deformation of the elastic return body 13 in the order of assembly of the door panes 4, 9 and finally 2 the restoring force for each Door panes increased so that even with the much thinner Formation of the elastic return body 13 in the area the support surface 32 through the door panes 4 and 9 caused a sufficient restoring force for the door pane 2 shows.

10 shows an alternative embodiment by means of a separate clamping body, here a metal leaf spring 18, the To increase the holding force of the door window in a targeted manner. Advantageously are such clamping elements evenly over the entire Width of the door window distributed symmetrically. It can but also only a metal leaf spring in the middle or nearby of the reset body 12 (FIG 5) may be provided. The additional or alternative clamping body is in turn on the Carrier strip 10 plugged, screwed, riveted or e.g. glued. Assembling the associated door window, in the illustrated embodiment, this is the door pane 2, on the elastic return body 13 and additionally on the separate Clamping body, the metal leaf spring 18, is analogous to 7 again in the insertion direction EV against the associated receiving surface 32 of the elastic return body 13 and the additional metal leaf spring surface 181 pressed. As an introductory aid, the one not shown here can be used Guide element 141 (FIG 8) and the frame inner surface 144 of the support bar 10 (FIG 11) serve. In FIG 10 also not shown are from e.g. 6 and 7 known guide elements (141, 142, 143) of the assembly aid 14, but of course also be provided here can.

FIG 11 illustrates in a longitudinal section A-A through the tensioned Metal leaf spring 18, with the metal leaf spring surface 181, as well as the reset body in the background 12 (which is known from FIG. 5 and in FIG. 10 in the direction of the Sectional view A-A lies) with the three associated contact surfaces 34, 39 and 32. As already described, the practice Contact surfaces on the built-in door panes 4, 9 and 2 a resetting force due to its elastic deformation against the insertion direction EV through which the door panes 4, 9 and 2 are pressed against the holding element 7.

Through a particularly advantageous design of the metal leaf spring 18, the web 145 of the carrier strip 10 can be such are encased so that the web 145 (e.g. thermoset, brittle) through the metal leaf spring (spring steel, highly tough) physically is protected. By inserting a bead on the Metal leaf spring surface 182 can be used to contact the contact surface Door window (here 4) with door window surface 41 very be kept small so that e.g. a thermal transition of a possible temperature gradient remains very small.

For all of the exemplary embodiments described, the Door panes 4, 9 and 2 always in the specified order to be installed from the inside out and from the outside in are to be expanded.

Instead of one or more reset bodies for each Several door panes can also be used for each door pane several separate return bodies can be provided.

A distinctive character of the door panes can also be or alternatively through different thicknesses of the door panes and correspondingly different widths of the corresponding ones Recording grooves can be reached.

Claims (27)

Door for a device, in particular for a cooking oven, comprising a) at least one resetting body (11, 12, 13) made of an elastomer, b) at least one counter surface (72, 74, 79) opposite the restoring body and c) at least one door pane (2, 4, 9),
in which d) the door pane is held between the restoring body and the counter surface under the action of a restoring force directed towards the counter surface of the elastically deformed restoring body. The door of claim 1, wherein the reset body Has hollow profile. The door of claim 2, wherein the return body is a Has hollow profile with several chambers (31) through a coherent wall (30) separated from each other are. The door of claim 3, wherein at least one of the chambers after at least one, preferably not in the direction of restoring force, side is open. Door according to claim 3 or claim 4, wherein the wall (30) of the reset body single, in the relieved state essentially straight and interrelated Has webs. Door according to claim 5, in which the webs under predetermined Angles are directed towards each other. Door according to one of the preceding claims, in which each restoring body has several contact surfaces on one front for one door pane each. The door of claim 7, wherein at least two of the bearing surfaces of the restoring body in its force-relieved State does not lie on a common level. A door as claimed in claim 7 or claim 8, in which the bearing surfaces of the restoring body in its force-relieved Condition arranged essentially parallel to each other are. Door according to one of claims 7 to 9, in which the bearing surfaces of the reset body in pairs to each other different levels are arranged. Door according to one of claims 7 to 10, wherein the return body two contact surfaces on the front has interconnecting flanks which in Relieved state of the restoring body under one from 90 ° different angles to the contact surfaces are directed. Door according to one of claims 7 to 11, wherein each Reset body on the side facing away from the contact surfaces Back is essentially flat. Door according to one of the preceding claims, each with Receivers for each reset body. Door according to one of the preceding claims, in which each reset body is detachably held. The door of claim 13 and claim 14, wherein each Reset body inserted into the associated receptacles or pinched and can be removed from this. Door according to one of the preceding claims with at least two between a reset body or one contact surface of a restoring body on the one hand and an associated counter surface on the other held door windows. The door of claim 16, wherein the door panes at least are arranged approximately parallel to each other. Door according to one of claims 16 and 17, wherein the door panes can only be installed in a specified order and can be removed in the reverse order. Door according to one of the preceding claims, in which each door pane can only be installed by hand without tools and / or is expandable. Door according to one of the preceding claims, in which each door pane is at least partially optically transparent is. Door according to one of the preceding claims with a Outer pane and at least two on this outer pane attached support elements and with two, each on one of the support elements attached holding elements which each have a counter surface, preferably in shape a receiving groove is formed for each door pane. Door according to one of the preceding claims, in which the Elastomer of the restoring body is a silicone, in particular Polysiloxane or a polyfluorosiloxane, is or, in particular in a copolymer. Door according to one of the preceding claims, in which the elastic modulus of the elastomer is below approximately 5000 N / mm ² , preferably below 2000 N / mm ² . Door according to one of the preceding claims, wherein at least an additional spring element 18 is provided. 25. The door of claim 24, wherein the additional spring elements Metal leaf springs are. Door according to one of claims 24 or 25, wherein the additional Spring elements on at least one of the door windows (2, 4, 9). Oven with a) an oven muffle with a loading opening for introducing food and b) a door according to one of the preceding claims for closing the loading opening of the furnace muffle.

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