EP3653935B1 - Chimney with door device - Google Patents

Description

The invention is based on a chimney for fireplaces, especially in residential buildings. The chimney has an outer casing, in particular composed of casing stones arranged one above the other. The outside of the jacket is preferably formed by plaster applied to the jacket. Inside the chimney there is a flue gas duct and a functional space. The chimney has a lower section, in the outer casing of which there is an inspection opening with access to the functional space and a cleaning opening with access to the flue gas duct. In the lower section of the chimney, a door device is formed which has a door leaf for the inspection opening and a door leaf for the cleaning opening.

From the DE 20 2016 100 271 U1 such a chimney is known. The chimney described in the document consists of mantle stones arranged one above the other. In the mantle stones, which form the lower section of the chimney, an opening is formed through which access to both the flue gas and the inspection room is possible. This opening in the lower section of the chimney has a Door equipment provided. The door device has a door frame which surrounds the opening as a rectangular frame. A pivot door leaf is mounted in door hinges on the door frame and covers the door opening in the closed position. The pivot door leaf represents a common door leaf for access to the flue gas duct and the inspection room. It thus serves as a cleaning door leaf and an inspection door leaf at the same time. Designs are also described in which the door frame is plastered together with the masonry of the chimney and the door leaf has a surface that can also be plastered. It is described that in this case the door leaf can have an insert which is designed as a plaster base plate.

In the DE 20 2016 100 191 U1 Various designs of chimney door devices are described, which are also used in the lower section of the chimney to cover a cleaning opening with access to the flue gas and an inspection opening with access to the inspection room. In the various designs of the door devices, various door frame elements are provided which are mounted in the opening in the lower section of the chimney. There are designs in which two separate door frames for the cleaning door leaf and the inspection door leaf are mounted on a common frame element. These are separate swivel blades that can be brought into the closed and open positions independently of one another. Designs are also described in which a common door leaf is provided instead of the separate door leaf. In the various versions it is provided that the door frame is inserted into the opening in the masonry of the chimney and, if necessary, plastered. In all versions, however, is an outer screen is provided which is pivotably articulated on the door frame in order to cover the inspection door leaf and the cleaning door leaf to the outside in the closed position. In this respect, this outer screen determines the overall visual impression of the door device.

The invention is based on the object of creating a door device for use in a chimney, which can be advantageously manufactured and which is installed as a flush-mounted door device in the lower section of the chimney and which provides optical advantages.

This object is achieved with the subject matter of main claim 1. What is essential in this solution is that the door device has a door frame device in or on which a cleaning door leaf and an inspection door leaf are mounted and the door device is designed as a flush-mounted door device in that the front surface of the cleaning door leaf and the front surface of the inspection door leaf are flush with the surface of the adjacent area of the plastered outer shell of the chimney are arranged. In this context, it is essential that the door frame device as well as the cleaning door leaf and the inspection door leaf of the door device have a special design so that, when the door device is installed, areas of the door device do not protrude beyond the surface of the plaster of the adjacent areas of the outer casing of the chimney, or at least not significantly survive, but the front sections of the door device and the surface of the adjacent areas of the outer shell are arranged in a common front plane. In order to achieve with this concept that the door device can be manufactured inexpensively in terms of manufacturing technology and at the same time the door device is special makes a favorable overall impression, it is provided that the door frame device is specifically designed as follows:
The door frame device has a door frame element, the door frame element being formed by a sheet metal element.
The sheet metal element has a rectangular base area directed towards the front side, on the outer edges of which edge regions protruding at right angles from the base area towards the front side are formed. The base surface is preferably formed by the front surface of a plate-shaped section of the sheet metal element.

The protruding edge regions have front-side free edges which span a front plane which is arranged parallel to the surface extension of the base surface.
A first opening and a second opening are formed in the base surface, the first opening being associated with the cleaning opening formed in the outer casing of the chimney by at least partially overlapping it, and the second opening being associated with the inspection opening formed in the outer casing by at least partially overlapped. This means that the base surface of the door frame thus has two separate openings which are assigned to the cleaning opening and inspection opening formed in the outer casing, that is to say in the masonry of the chimney. The cleaning opening and inspection opening formed in the outer casing of the chimney can also be designed as separate openings. However, it is also possible that these two openings are formed in the outer casing of the chimney within a common opening in the outer casing, namely the cleaning opening as the upper section of the overall opening and the inspection opening as the lower section of the overall opening. Essential is that the flue gas duct is accessible through the cleaning opening and the inspection room is accessible through the inspection opening.
The first opening and the second opening in the base surface of the sheet metal element, ie in the door frame element, are arranged at a constant distance from one another and between the first opening and the second opening a substantially strip-shaped surface section of the base surface is formed, on the front side of which a cross member body is arranged. The transverse spar body can be permanently or releasably attached to the sheet metal element, for example by a welded or soldered connection or by a screw or rivet connection.
The transverse spar body extends between the edge area of the left side edge of the base area protruding from the base area to the front side and the edge area of the right side edge of the base area protruding from the base area to the front side, preferably over the entire area, preferably so that it includes the left edge area connects to the right edge area.
The transverse hollow body has a surface directed towards the front side, which is arranged in alignment in the front plane spanned by the front free edges of the edge regions of the sheet metal element protruding towards the front side.
The sheet metal element, preferably the base surface, has a bearing device arranged next to the first opening for the cleaning door leaf and a bearing device arranged next to the second door opening for the inspection door leaf. The storage device is used to store and / or hold the cleaning door leaf or the inspection door leaf. The bearing device can preferably be designed as a pivot bearing device.

The cleaning door leaf and the inspection door leaf of the door equipment are designed as follows:
The cleaning door leaf is assigned to the first opening of the base surface of the frame element in such a way that the cleaning door leaf covers this first opening in its closed position and releases this first opening in its open position.

The revision door leaf is assigned to the second opening of the base surface of the frame element in such a way that the revision door leaf covers the second opening in its closed position and exposes the second opening in its open position.
In the closed position of the door leaf, the front surface of the cleaning door leaf and the front surface of the inspection door leaf as well as the front surface of the transverse strut body are arranged in alignment with the aforementioned front plane, which is spanned by the free edges of the edge areas of the sheet metal element protruding towards the front side and with the top of the adjacent area of the the plastered outer casing of the chimney and is aligned with the front surface of the cleaning door leaf and the front surface of the inspection door leaf.

In particularly preferred embodiments, there are significant optical advantages if gaps of as constant a narrow clear width as possible are formed between the transverse strut body of the door frame element and the cleaning door leaf on the one hand and the inspection door leaf on the other hand between the adjacent edges. In these designs it is provided that the cleaning door leaf in its closed position with its lower edge on the upper edge of the cross member body with the formation of a first horizontal running gap. As far as the revision door leaf is concerned, it is provided that the revision door leaf, in its closed position, adjoins the lower edge of the transverse strut body with its upper edge, forming a second horizontally extending gap.

In the closed position of the door leaves, gaps are preferably also formed in the edge regions of the frame element protruding towards the front side. Preferred embodiments therefore provide that the cleaning door leaf in its closed position adjoins the edge areas of the door frame element arranged on the upper horizontal outer edge of the base surface and protruding towards the front, forming a horizontally extending upper gap, and / or on the left or right vertical gap Outer edge of the base area, the front side protruding edge regions of the door frame element with the formation of a left and / or right laterally extending vertical gap adjoins. Particularly preferred embodiments provide that a gap is formed on all four sides of the cleaning door leaf to the adjoining edge areas of the door frame element and to the adjoining cross member body, i.e. as a circumferential gap.

With regard to the revision door leaf, preferred embodiments provide that the revision door leaf, in its closed position, adjoins the edge areas of the door frame element that are arranged on the lower horizontal outer edge of the base surface and project towards the front side, forming a horizontally running lower gap, and / or on the left or right side right vertical outer edge of the base area, the front side protruding edge areas of the door frame element with the formation of a left and / or right running laterally running vertical gap. Particularly preferred embodiments provide that a gap is formed on all four sides of the inspection door leaf to the adjoining edge areas of the door frame and to the adjoining cross member body, ie as a circumferential gap.

Advantageous embodiments provide that the cleaning door leaf is designed as a pivoting leaf and the associated bearing device is formed on the sheet metal element as part of the pivot bearing.

Furthermore, preferred embodiments provide that the inspection door leaf is designed as a swivel leaf and the associated bearing device on the sheet metal element is designed as part of the swivel bearing.

As an alternative to this, it can also be provided that the inspection door leaf is designed as a cover and / or slide and the associated bearing device on the sheet metal element is designed as part of the holder and / or the pivot bearing.

In order to obtain a particularly good overall visual impression in the flush-mounted door device, it can be provided that the cleaning door leaf and / or the inspection door leaf and / or the cross member body is formed from a plaster base material or has an insert made from plaster base material. In these designs, plaster is preferably applied to the plaster base material in the installed state. Alternative designs are possible in which the cleaning door leaf and / or the inspection door leaf and / or the transverse strut body and / or the insert are or is designed with a prefabricated surface structure that corresponds to the The surface structure of the plaster of the adjoining outer jacket of the chimney is adapted, ie is the same or similar to the surface structure of the plaster or fits particularly well with the outer surface of the plaster in terms of the visual impression. It can be provided for this that the named components are made of mineral fiber material or plasterboard material or ceramic material or at least have a plate-shaped front side, in particular designed as mineral fiber board, plasterboard or ceramic board.

The dimensions of the cleaning door leaf or the inspection door leaf or the cross member body or the insert are preferably chosen so that the outside of the plaster applied to the front of this component or the front outside with the prefabricated plaster-like or plaster-like surface structure with the outside of the adjacent one Outer jacket of the chimney applied plaster is aligned in the common front plane.

In order to obtain a corresponding form resistance of the cleaning door leaf, preferred embodiments provide that a plug-like, thermally insulated closure element, formed on the side of the cleaning door leaf facing away from the front, engages in the first opening of the base surface of the surface element in the closed position of the cleaning door leaf.

An advantageous closure of the cleaning door leaf is also achieved in preferred embodiments in that a guide plate device is arranged around the first opening on the side of the base surface of the plate element facing away from the front side.

A particularly good producibility results in designs which provide that the sheet metal element is formed in one piece.

Figur 1

einen unteren Abschnitt eines erfindungsgemäßen Schornsteins mit erfindungsgemäßer Türeinrichtung, erste Ausführungsvariante der Türeinrichtung, in schematischer Frontansicht;

Figur 1a

eine Einzeldarstellung der ersten Ausführungsvariante der Türeinrichtung aus Figur 1 mit gemeinsamem Türrahmen und separatem Putztürflügel und separatem Revisionstürflügel, der Putztürflügel und der Revisionstürflügel jeweils in Offenstellung, in perspektivischer Frontansicht Blickrichtung schräg von unten;

Figur 1 b

eine Einzeldarstellung der ersten Ausführungsvariante der Türeinrichtung aus Figur 1a, jedoch der Putztürflügel in Offenstellung und der Revisionstürflügel in Schließstellung, in perspektivischer Frontansicht Blickrichtung schräg von unten.

Figur 2

eine Einzeldarstellung einer zweiten nicht erfindungsgemäßen Ausführungsvariante der Türeinrichtung mit separater Putztür und separater Revisionstür, jeweils mit separaten Türrahmen und separatem Türflügel, wobei der Putztürflügel und der Revisionstürflügel in Offenstellung dargestellt sind, in perspektivischer Frontansicht Blickrichtung schräg von unten;

Figur 3

eine Einzeldarstellung einer dritten nicht erfindungsgemäßen Ausführungsvariante der Türeinrichtung mit gemeinsamem Türflügel und gemeinsamem Putz- und Revisionstürflügel, der gemeinsame Putz- und Revisionstürflügel in Offenstellung dargestellt, in perspektivischer Frontansicht Blickrichtung schräg von unten.

The invention is explained in more detail below with reference to drawings. Show:

Figure 1

a lower section of a chimney according to the invention with a door device according to the invention, first variant of the door device, in a schematic front view;

Figure 1a

an individual representation of the first variant of the door device Figure 1 with a common door frame and separate cleaning door leaf and separate inspection door leaf, the cleaning door leaf and the inspection door leaf each in the open position, in a perspective front view, looking at an angle from below;

Figure 1 b

an individual representation of the first variant of the door device Figure 1a , but the cleaning door leaf in the open position and the inspection door leaf in the closed position, in a perspective front view looking at an angle from below.

Figure 2

an individual representation of a second variant embodiment of the door device, not according to the invention, with a separate cleaning door and separate inspection door, each with a separate door frame and separate door leaf, the cleaning door leaf and the Inspection door leaves are shown in the open position, in a perspective front view looking at an angle from below;

Figure 3

an individual representation of a third variant of the door device not according to the invention with a common door leaf and a common cleaning and inspection door leaf, the common cleaning and inspection door leaf shown in the open position, in a perspective front view looking obliquely from below.

The embodiment variants shown are each door devices 1 for installation in the lower section 2u of a chimney 2. The first embodiment variant of the door device 1 is shown in FIG Figure 1 installed in the lower section 2u of the chimney 2 is shown. All design variants of the door device are each designed as a flush-mounted door device. In the installed state, the front-side protruding sections of the door device 1 span a front plane with their front-side free ends and surfaces. This front plane is aligned with the front plane which is formed by the outside of the plaster of the adjacent masonry of the chimney 2. The outside of the plaster forms the outside of the outer shell 2a of the chimney 2. The so common front plane is in Figure 1 parallel to the plane of the drawing. The common front plane is a vertically extending plane.

In the Figures 1a and 1b the variant of the door device 1 is shown in detail. The door device comprises a common door frame 11 on which a cleaning door leaf 10p and an inspection door leaf 10r are pivotably mounted.

The common door frame 11 is formed from a sheet metal element 111. The sheet metal element 111 has a rectangular base area 111b, at the outer edges of which front edge regions 111a protrude at right angles. The base surface 111b is formed by a flat, plate-shaped base section of the sheet metal element 111. The plate-shaped base portion of the sheet metal element 111 is hereinafter referred to as “base surface 111b”. In the base surface 111b, a first opening 111pö is formed in the upper section and a second opening 111rö is formed in the lower section. The cleaning door leaf 10p is assigned to the first opening in the upper section. The revision door leaf 10r is assigned to the second opening. The first opening here forms the cleaning door opening 111pö, which is covered in the closed position of the cleaning door leaf 10p. The second opening forms the inspection door opening 111rö, which is covered in the closed position of the inspection door leaf 10r. The cleaning door leaf 10p and the inspection door leaf 10r are each pivotably mounted in frame-side pivot bearings 111g. The pivot bearings are as hinge pin receptacles 111g on the base surface 111b close to the one in the Figures 1a and 1b arranged right outer edge. They can be designed as resting separate components or as parts molded into the sheet metal element. The cleaning door leaf 10p and the inspection door leaf 10r each have the edge-side leaf-side pivot bearings, preferably designed as hinge pins 10g, which are brought into engagement with the frame-side pivot bearings.

The front plane of the door device is spanned by the front-side free edges of the front-side protruding edge regions 111a. In this spanned plane, the front of the door leaves are also aligned when they are in the closed position. As already mentioned, this front plane is aligned, which is arranged parallel to the base surface 111b, with the outside of the plaster of the adjacent area of the outer casing 2a of the chimney 2.

A transverse spar body 111q is fixedly arranged on the base surface 111b of the sheet metal element 111, for example by means of a welded or soldered connection or a rivet or screw connection. The transverse spar body 111q extends transversely between the protruding edge regions 111a on the left and right in the illustration in the figures, namely in the strip-shaped region of the base surface 111b between the openings 111rö and 111pö formed in the base surface 111b Base area that is not covered by the cleaning door leaf 10p and the inspection door leaf 10r in their closed position. In the closed position of the cleaning door leaf 10p, its lower edge borders on the upper edge of the cross member body 111q. In the closed position of the revision door leaf 10r, its upper edge adjoins the lower edge of the cross member body 111q. This adjoining takes place in each case with the formation of a horizontally running narrow gap between the transverse strut body 111q and the respective door leaf. In the closed position of the door leaves the further free outer edges of the door leaves 10p, 10r border the frontal protruding edge regions 111a, which are arranged on the outer edges of the base surface 111b, also with the formation of a narrow gap. The door leaves 10p, 10r thus each form a circumferential gap between their outer edges and the protruding edge regions 111a and the cross member body 111q. The circumferential gap has a constant clear width over the entire gap length. The cross member body 111q is an essentially cuboid body, which is arranged on the base surface 111b of the door frame 11 in such a way that its front side is flush with the front plane of the door device 1.

The cleaning door leaf 10p and the inspection door leaf 10r can be pivoted independently of one another. The cleaning door leaf 10p has on its inside an essentially flat, cuboid-shaped closure body 10k which, in the closed position of the cleaning door leaf 10p, engages in a sealing manner in the cleaning door opening 111pö. In the edge region of the cleaning door opening 111pö, guide plates 111t which protrude essentially at right angles are arranged on the inside, between which the closure body 10k of the cleaning door leaf engages.

In the Figure 2 The illustrated second variant of the door device 1, not according to the invention, differs from the first variant in that, instead of the common door frame 11, the inspection door leaf 10r and the cleaning door leaf 10p each have a separate door frame, namely an inspection door frame 11r and a cleaning door frame 11p. These are door frames with a rectangular, in the representation almost square floor plan, which corresponds to the floor plan of the respectively assigned wing, ie the cleaning door wing 10p, or the inspection door wing 10r. The different design variants of the figures are preferably produced using a common modular system. It is essential here that the construction kit has the common door frame 11 as a component and the separate door frames 10r and 10p are produced from this component, ie from the common door frame 11. The production takes place in that the sheet metal element 111 of the common door frame 11 is divided. This becomes from the upper part of the cleaning door frame 11p and from the formed lower part of the inspection door frame 11r. After the separation process, ie after cutting the sheet metal element 111 apart, a front-side protruding edge area 111a is formed on the free cut edges, that is, the front-side protruding edge area 111a is formed on the lower horizontal edge of the cleaning door frame 11p, and the front-side protruding edge area 111a is formed on the inspection door frame 11r protruding edge region 111a formed in the region of the upper horizontal edge.

Alternatively, the separating process can also be carried out on the sheet metal element 111 before the edge regions protruding on the front side are formed on the outer edge of the sheet metal element 111. All of the protruding edge regions 111a can then be made after the sheet metal element has been cut apart.

The cleaning door frame 11p and the inspection door frame 11r are thus completely separate frames. The cross member body 111q of the common door frame 11 of the first variant is not present in the second variant. The rest of the structural design of the door frame is the same in the case of the inspection door frame 11r and the cleaning door frame 11p as in the case of the common door frame 11 of the first embodiment variant. The cleaning door leaf 10p and the inspection door leaf 10r are identical to those of the first variant.

In the Figure 3 The third embodiment variant shown, not according to the invention, differs from the first embodiment variant in that instead of the separate door leaf, ie cleaning door leaf 10p and inspection door leaf 10r, a common door leaf, ie a common door leaf Revision plaster door leaf 10 is used. This is pivotably mounted in the identical pivot bearing devices in the common door frame 11.

The frame-side pivot bearing device of the common plaster revision door leaf 10 is a composite pivot bearing device. It is composed of the pivot bearing device in the upper section of the sheet metal element 111 and the pivot bearing device in the lower section of the sheet metal element 111.

On the plaster revision door leaf 10, corresponding complementary leaf-side hinge bolts 10g are formed on the edge side.

The common plaster revision door leaf 10 is designed as a one-piece leaf, the front side of which is aligned in the closed position of the door leaf in the front plane of the door device 1, i.e. with the front-side free edges of the front-side protruding edge areas 111a of the outer edges of the door frame 11. In the closed position of the door, the common cleaning inspection door leaf 10 covers both the cleaning door opening 111pö and the inspection door opening 111rö of the common door frame 11. On the inside of the door leaf 10, a closure body 10k is arranged in the upper section, which is identical to the closure body 10k of the cleaning door leaf 10p of the first and second embodiment variants and in the same way engages in a sealing manner in the cleaning door opening 111pö in the closed position of the door.

The inspection door leaf 10r and the cleaning door leaf 10p are preferably each made of plaster carrier material in the exemplary embodiments formed or they preferably each have a plate-shaped insert which is formed from plaster carrier material and forms the front side of the inspection door leaf or the cleaning door leaf. The structural design with the dimensions is chosen so that when the door device is installed, the outside of the plaster applied to the plaster base material is aligned with the outside of the plaster of the adjacent area of the outer casing of the chimney, i.e. with the formation of an aligned front plane.

• gemeinsamer Türrahmen 11
• Putztürflügel 10p
• Revisionstürflügel 10r
• gemeinsamer Türflügel 10
• Querholmkörper 111q

The various exemplary embodiments shown in the figures are preferably produced using a construction kit. The components of the kit are:

• common door frame 11
• Cleaning door leaf 10p
• Inspection door leaf 10r
• common door leaf 10
• Cross member body 111q

It goes without saying that the various components of the modular system are each present in a plurality.

When using the modular system, it is essential that the component: common door frame 11 is used to produce the separate cleaning door frame 11p and the separate inspection door frame 11r by dividing the common door frame 11.

The component: common door frame 11 has no transverse strut body 111q, ie the door frame 11 is like the door frame of the exemplary embodiment in FIG Fig. 3 educated.

With the construction kit, the embodiment of the Fig. 1a are produced by the inspection door leaf 10r and the cleaning door leaf 10p being pivotably mounted on the door frame 11. This is done by hanging the cleaning door leaf 10p and the inspection door leaf 10r with their complementary bearing devices arranged on the edge in the pivot bearing devices already provided in the door frame 11, preferably designed as a hinge pin receptacle 111g. The cross member body 111q is applied to the base surface 111b of the door frame 11 on the front side. This is done before or after the wings 10r, 10p are hung.

The embodiment not according to the invention of Fig. 2 is made by first making the separate inspection door frame 11r and the separate cleaning door frame 11p by dividing the door frame 11. The dividing can be done by cutting the sheet material. This production of the separate door frames 11r and 11p takes place from the door frame 11, which does not carry a cross member body 111q. After dividing the door frame 11, ie after the cutting process, the cleaning door frame 11p is then made from the upper part and the inspection door frame 11r from the lower part, by bending the edge area of the protruding front edge areas 111a at the dividing edge of the two parts by 90 ° is trained. The lower protruding edge region 111a of the cleaning door frame 11p and the upper protruding edge region 111a of the inspection door frame 11r are thus formed so that the two separate door frames 11r, 11p are each formed on all four side edges of the front protruding edge regions 111a. In the separate door frames completed in this way, the door leaves are then hooked into the pivot bearing devices already present on the frame side and on the leaf side, ie the cleaning door leaf 10p is hung in the cleaning door frame 11p and the inspection door leaf 10r in the inspection door frame 11r.

To produce the embodiment not according to the invention of Fig. 3 the door leaf 10 is pivotably mounted on the door frame 11. For this purpose, corresponding bearings are formed on the door leaf 10, which are assigned to the pivot bearings which are formed on the door frame 11 in the upper and lower sections of the frame, which are brought into engagement with one another when hanging.

List of reference symbols

1

Door equipment

10

Common door leaf

10r

Revision door leaf

10p

Cleaning door leaf

10k

Locking body

10g

Hinge pin in the door leaf

11

Common door frame

11r

Revision door frame

11p

Cleaning door frame

11G

Hinge axis

111

Sheet metal element

111q

Transverse spar body

111b

Base surface

111a

Protruding edge area on the front

111rö

Inspection door opening

111pö

Cleaning door opening

111t

Baffle

111g

Pivot bearing, hinge pin mount on the frame

2

chimney

2u

Lower section of the chimney

Claims (11)

1. Chimney for fireplaces, in particular in residential buildings, wherein the chimney (2) has an outer casing (2a), in particular made of casing stones arranged one above the other, and a smoke gas flue and a functional chamber are formed inside the chimney (2),
   wherein the chimney (2) has a lower portion (2u), in the outer casing (2a) of which a revision opening (111rö) with access to the functional chamber and a soot opening (111pö) with access to the smoke gas flue are formed, wherein a door device (1) is formed in the lower portion (2u) of the chimney (2), said door device having a door leaf (10r) for the revision opening (111rö) and a door leaf (10p) for the soot opening (111pö),
   wherein the door device (1) has a door frame device (11, 11p, 11r) in which the door leaf (10r) of the revision opening (111rö) - revision door leaf (10r) below - and the door leaf (10p) of the soot opening (111pö) - soot door opening (10p) below - are mounted, and the door device (1) is formed as a under-plaster door device by the front face of the soot door leaf (10p) and the front face of the revision door leaf (10r) being arranged flushly on a plane with the surface of the adjacent region of the plastered outer casing (2a) of the chimney (2),

   a) wherein the door frame device (11, 11r, 11p) is formed in such a way that

   - the door frame device (11, 11p, 11r) has a door frame element (111), wherein the door frame element (111) is formed by a sheet element (111);

   - the sheet element (111) has a rectangular base face (111b) directed towards the front side, on the outer edges of which base face edge regions (111a) protruding perpendicularly from the base face towards the front side are formed,

   - the protruding edge regions (111a) have front-side free edges which span a front plane which is arranged in parallel to the face extension of the base face (111b),

   - in the base face (111b), a first opening (111pö) and a second opening (111rö) are formed, wherein the first opening (111pö) is allocated to the soot opening formed in the outer casing (2a) of the chimney (2) by it at least partially overlapping this, and the second opening (111rö) is allocated to the revision opening formed in the outer casing (2a) by it at least partially overlapping this,

   - the first opening (111pö) and the second opening (111rö) are arranged at a distance apart from one another with constant spacing size, and a substantially strip-shaped face portion of the base face (111b) is formed between the first opening (111pö) and the second opening (111rö), on the front side of which base face a transverse spar body (111q) is formed,

   - the transverse spar body (111q) extends between the edge region (111a), protruding from the base face (111b) towards the front side, of the left side edge of the base face to the edge region (111a), protruding from the base face towards the front side, of the right side edge of the base face (111b)

   - the transverse spar body (111q) has a face directed towards the front side, said face being arranged flushly on the front plane spanned by the front-side free edges of the edge regions (111a), protruding towards the front side, of the sheet element (111),

   - the sheet element (111), preferably the base face (111b), has a bearing device arranged next to the first opening (111pö) for the soot door leaf (10p) and a bearing device arranged next to the second opening (111rö) for the revision door leaf (10r).

   b) wherein the soot door leaf (10p) and the revision door leaf (10r) of the door device (1) are formed in such a way that

   - the soot door leaf (10p) of the first opening (111pö) is allocated to the base face (111b) in such a way that, in its closed position, the soot door leaf covers the first opening (111pö) and, in its open position, exposes the first opening (111pö),

   - the revision door leaf (10r) of the second opening (111rö) is allocated to the base face (111b) in such a way that, in its closed position, the revision door leaf (10r) covers the second opening (111rö) and, in its open position, exposes the second opening (111rö),

   - in the closed position of the door leaves, the front face of the soot door leaf (10p) and the front face of the revision door leaf (10r) as well as the front face of the transverse spar body (111q) are arranged flushly with the front plane, wherein this front plane is formed by the free edges (111a) of the edge regions, protruding towards the front side, of the sheet element (111) and is flush with the surface of the adjacent region of the plastered outer casing (2a) of the chimney (2),

   - the front plane spanned by the front-sided free edges of the edge regions (111a) protruding towards the front side is formed flushly with the surface of an adjacent region of the plastered outer casing (2a) of the chimney (2) and/or with the front face of the soot door leaf (10p) and/or the revision door leaf (10r).
2. Chimney according to claim 1,
   wherein, in its closed position, the soot door leaf (10p) abuts on the upper edge of the transverse spar body (111q) with its lower edge by forming a first horizontally running gap, and, in its closed position, the revision door leaf (10r) abuts on the lower edge of the transverse spar body (111q) with its upper edge by forming a second horizontally running gap.
3. Chimney according to one of the preceding claims,
   wherein, in its closed position, the soot door leaf (10p) abuts on the edge regions (111a) arranged on the upper horizontal outer edge of the base face (111b) and protruding towards the front side by forming a horizontally running upper gap, and/or abuts on the edge regions (111a) arranged on the left or right vertical outer edge of the base face (111b) and protruding towards the front side by forming a vertically laterally running gap.
4. Chimney according to one of the preceding claims,
   wherein, in its closed position, the revision door leaf (10r) abuts on the edge regions arranged on the lower horizontal outer edge of the base face (111b) and protruding towards the front side by forming a horizontally running lower gap, and/or abuts on the edge regions (111a) arranged on the left or right vertical outer edge of the base face (111b) and protruding towards the front side by forming a vertically running lateral gap.
5. Chimney according to one of the preceding claims,
   wherein the soot door leaf (10p) is formed as a pivot leaf, and the allocated bearing device (111g) is formed on the sheet element (111) as part of the pivot bearing.
6. Chimney according to one of the preceding claims,
   wherein the revision door leaf (10r) is formed as a pivot leaf, and the allocated bearing device (111g) is formed on the sheet element (111) as part of the pivot bearing.
7. Chimney according to one of claims 1 to 5,
   wherein the revision door leaf (10r) is formed as a cover and/or slider, and the allocated bearing device (111g) is formed on the sheet element (111) as part of the bracket and/or the pivot bearing.
8. Chimney according to one of the preceding claims,
   wherein the soot door leaf (10p) and/or the revision door leaf (10r) and/or the transverse spar body (111q) is formed from the plaster-carrier material or has an insert made of a plaster-carrier material.
9. Chimney according to one of the preceding claims,
   wherein a sealing element (10k), plug-like in the broadest sense, formed on the side of the soot door leaf (10p) facing away from the front side engages into the first opening (111pö) of the base face of the face element in the closed position of the soot door leaf (10p).
10. Chimney according to one of the preceding claims,
    wherein a guide sheet device (111t) is arranged on the side of the base face (111b), facing away from the front side, of the sheet element (111) around the first opening (111pö).
11. Chimney according to one of the preceding claims,
    wherein the sheet element (111) is formed integrally.

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