EP2602417A1 - Door leaf and method for producing the same - Google Patents

Abstract

The leaf (10) has a vertical narrow front end (26) inserted into a door leaf cavity (30) of the door leaf. Side areas of sheet metal elements (12, 14) e.g. box metal sheets and lid metal sheets, are extended in a longitudinal direction of the narrow front end. A side cavity is filled with a filling material. The side cavity surrounds edge regions of the sheet metal elements, and is interconnected directly or indirectly through the filling material without touching the sheet metal elements. A reinforcing strip made of metal is embedded between thermal insulation stripes. An independent claim is also included for a method for manufacturing a door leaf.

Description

The invention relates to a door leaf in box-lid construction and a method for producing such a door panel.

In particular, the invention relates to a door leaf, which are formed from sheet metal elements in the form of a box plate and a cover plate. More particularly, the door leaf is designed as a fire door leaf.

The object of the invention is to form a door leaf in box-lid construction, which can also be designed as a fire door, is thermally separated and has a high thermal insulation, is inexpensive to mass-produce and has increased rigidity.

To solve this problem, a door leaf with the features of claim 1 is proposed according to the invention. An advantageous manufacturing method is specified in the independent claim.

Advantageous embodiments of the invention are the subject of the dependent claims.

According to a first aspect, the invention provides a box-lid door panel, in particular fire-resistant door panel, comprising first and second metal sheet members respectively formed from a sheet metal panel, which together enclose a door panel cavity, and with a filling inserted in the door panel cavity, at least a narrow end face of the door leaf margins of the sheet metal elements form a longitudinally narrow side of the extending, encompassed by the edge regions side cavity, which is filled by a filler, which conducts thermally worse than the metal sheet, which surrounds the side cavity Edge regions of the sheet metal elements, without the metal sheet elements touching each other directly, are indirectly connected to each other via the filler material.

In an advantageous embodiment, it is provided that the filling material has a first strip of heat-insulating material, a second strip of heat-insulating material and a reinforcing strip therebetween.

It is preferred that the reinforcing strip is formed of metal and is formed smaller in width than the strips of heat insulating material, the strips of heat insulating material preferably projecting on both sides over the reinforcing strip.

It is particularly preferred that the edge region of at least one of the sheet metal elements form a U-shaped profile, which forms on a part of the narrow end side, extending in a thickness direction of the door leaf, preferably formed by a double folding profile range of the sheet metal element inwardly toward the door leaf cavity directionally connected.

It is preferably provided that both the edge region of the first metal sheet element and the edge region of the second metal sheet element are U-shaped profiled with mutually open U-profile grooves, so that the U-profile grooves together form the side cavity.

According to a further embodiment of the invention it is provided that the side cavity is enclosed in total by a C-shaped structure formed by the edge regions of the sheet metal elements.

It is preferred that the edge regions of the sheet metal elements seen in the narrow end side longitudinal direction have complementary to each other formed succession of projections and recesses, wherein the Projections of a sheet metal element in the recesses of the other sheet metal element non-contact, in particular at a distance, intermesh.

It is particularly preferred that the succession of projections and recesses are formed by rectangular or trapezoidal notches on the outermost edge strips of the sheet metal elements forming metal sheets.

In an advantageous embodiment, it is provided that the projections are fastened to the filling material in each case by at least one fastening element, in particular a screw, more particularly a drilling screw.

Preferably, it is provided that the filler has at least one strip of fire protection material on a mineral basis, in particular of mineral fiber board or of a vermiculite material.

According to a preferred embodiment of the invention it is provided that the end-side side cavity is formed by multiple bending of the edge regions.

It is preferred that the narrow-side, filled with the filling material side cavity is open to the outside through a narrow end face extending gap whose width is smaller, in particular at least half smaller than the extension of the side cavity in the thickness direction.

It is particularly preferred that the filling in the door leaf cavity is formed by a mineral fiber board and that the filling and the sheet metal elements are connected cohesively over a large area, in particular glued together over a large area.

It is preferably provided that at least the two narrow end faces to be arranged vertically and a narrow end face to be arranged horizontally above each are formed with the longitudinally over the entire narrow end side extending side cavity.

It is further preferred that a respective side cavity is provided on all narrow end sides along its entire extension, wherein the filler material is overlapped on the outside in the respective first side cavity of the vertically arranged narrow end sides of the edge regions of both the first and the second sheet metal element, while a second side cavity of a bottom horizontally to be arranged narrow end side outside only by the edge region of only one of the sheet metal elements is encompassed, wherein between the lower side cavity and the main extension plane of the other sheet metal element, a lower door groove is formed.

• a) Bereitstellen einer ersten Metallblechtafel zum Bilden des ersten Metallblechelements und einer zweiten Metallblechtafel zum Bilden des zweiten Metallblechelements,
• c) Umfalten von Randbereichen der Metallblechtafeln zum Bilden einer U-Profilstruktur,
• d) Umfalten der gesamten U-Profilstruktur und Anpressen, um eine Doppelfaltung zu formen, die einen Teil der äußeren Schmalstirnseitenoberfläche bildet.

According to a further aspect, the invention provides a method for producing such, in particular thermally separated, door leaf, characterized by the steps

• a) providing a first metal sheet panel for forming the first sheet metal member and a second metal sheet panel for forming the second sheet metal member,
• c) folding edge regions of the metal sheet panels to form a U-profile structure,
• d) folding the entire U-profile structure and pressing to form a double fold forming part of the outer narrow face side surface.

• b) Ausklinken von umzuformenden Randbereichen der Metallblechtafeln um eine entlang des Randes verlaufende Aufeinanderfolge von Vorsprüngen und Rücksprüngen zu schaffen, wobei die Aufeinanderfolgen von Vorsprüngen und Rücksprüngen an dem ersten und dem zweiten Metallblech komplementär zueinander ausgebildet sind.

A particularly preferred embodiment of the method is characterized by the step to be carried out before step c):

• b) notching edge portions of the metal sheet panels to be formed to provide a sequential succession of projections and recesses, the successions of projections and recesses on the first and second metal sheets being complementary to one another.

• e) Einlegen eines Füllelements (64) in die U-Profilstruktur,
• f) Einlegen und Verklebung einer Füllung (22) in einen zwischen den U-Profilstrukturen verbleibenden Türblatthohlraum (20) des ersten Metallblechelements (12),
• g) Aufsetzen und Verkleben des zweiten Metallblechelements (14) auf die Füllung (22).

A particularly preferred embodiment of the method is characterized by the steps:

• e) inserting a filling element (64) into the U-profile structure,
• f) inserting and bonding a filling (22) into a door leaf cavity (20) of the first metal sheet element (12) remaining between the U-profile structures,
• g) placing and bonding the second sheet metal element (14) on the filling (22).

According to a preferred embodiment, an object of the construction is to achieve as complete a thermal separation as possible between a box panel and a cover panel of a door panel. For this purpose, strips of mineral plate, in particular strips of a vermiculite plate (for example Thermax® strips) with metal strips inserted in between. Preferably, a new special edge geometry of box panel and cover sheet is created. In a particularly preferred embodiment, both the box sheet and the cover sheet, the edges are bent several times, so that the strip filler is accessible only by a small gap to the outside. In order to achieve a receiving area for the strip filling material, there is seen from the outside of the outer surface of the front side inwards, first a complete refolding of the sheets, then a U-profile with two U-legs, which are connected by a web. A U-leg is part of a double fold which forms a profile area for forming the outer face. A web is preferably formed inwardly extending parallel to the door leaf broad surface; this is followed by the further U-leg, which is formed from the outermost, the edge of the metal sheet panel forming edge strips. This free end portion of the U-profile is preferably notched. Preferably, a series of projections and recesses is created here. Preferably, corresponding U-profile structures are formed both on the box plate and on the cover plate, which are arranged in mirror image to each other and thus extend to each other with their U-profile grooves. Projections and recesses on the free U-webs are complementary and engage in the assembled state of the metal sheets into each other. As a result, a total C-profile structure is created by the two U-profile structures, wherein the gap is open to the outside and the side cavity thus formed is separated from the door leaf cavity by the interlocking U-webs towards the inside.

In one embodiment, there are rectangular notches on box plate and cover plate, which then interlock alternately. A connection between the box plate and cover sheet is made by the strips of filler material which are inserted in the side cavity thus formed.

Preferably, the filler itself is formed of a plurality of strips of mineral plate with a piece of sheet metal therebetween. Such a central piece of sheet metal between strips of thermally-separating material, which is inserted in the side cavity, increases the rigidity of Stirnbreitseitenprofilierung even more.

According to a particularly preferred embodiment, neither touch the box panel, nor the cover sheet, nor the intervening metal strip.

An attachment is preferably via fasteners such as screw elements.

Overall, there is a thermal separation and yet a very rigid construction.

There are different approaches to what the alternating, interlocking notches look like. One solution is a rectangular notch. Another solution would be a kind of trapezoidal notch so that dovetail structures arise. Overall, the sheets can engage behind positively with such notches. In such a dovetail-shaped notch or other notch with Rear grip can hook behind the sheets and so a further stiffening, especially in case of fire, cause.

Preferably, the above-described training with C-profile structure, which are formed by two mutually mirror-symmetrically arranged U-profile structures at the edge regions of the sheet metal elements, formed on the vertically arranged narrow end faces (lock side and hinge side) and on the above to be arranged horizontally narrow end face. At the below to be arranged horizontally narrow end face a different construction is preferably provided for this purpose, in particular to here still a downwardly open door groove, for example, for receiving smoke protection seals or soundproofing materials to create. In a preferred embodiment, only the box plate is bent around filling material around in the lower area. Here, only one strip of filler material can be provided, that is without the interposition of another metal strip. If here the box plate is connected by the strip of filling material with a metal screw with the cover plate, a ring of thermally insulating material is preferably inserted below the screw head to realize the complete thermal separation. In such a construction, where connections in the top and side circumferential end portions only occurs over the filler material and where thermal bridges are realized below by washers of thermally isolating material, complete thermal separation between the box panel and the cover sheet can be achieved.

The preferred edge geometry with inward-reaching U-profile can be achieved by cold forming machines, such as roller with multiple rolling tools. The aforementioned double folding can be achieved, for example, by detecting the profile structure from behind and pressing from behind.

In a preferred procedure for producing the edge geometry, a folding takes place from outside to inside. First, the notches on the sheets for producing the succession of projections and Made recesses, then the notched plates are folded down, then folded the U-webs and U-legs, then the double folding takes place with pressing.

For joining of filling and metal sheets bonding is preferably used. Preferably, the filling of the door leaf cavity is essentially formed by a mineral fiber plate, which is glued over a large area with the inner surfaces of the door leaf broadsides. As a result, stiffening of the door leaf does not take place solely via stiffening folds on the front side areas, and the main part of the stiffening is achieved by the sandwich construction of the superposed and glued-together layers. By a large, or full-surface bonding the construction of the door leaf is very stiff in itself, so that can be dispensed with reinforcements by additional metal bars in the edges.

It should be remembered that in fire doors very high bending moments act on the door leaves in case of fire. In case of fire, one of the door leaf broadsides becomes very hot, while the other door leaf broadside has a much lower temperature, which leads to different expansions of the metal sheet panels and bending in case of fire. Due to the multiple folds and the sandwich construction with cohesively connected layers lying on top of each other, however, this is easy to control, without having to bring in additional stiffening elements.

Fig. 1

eine Vorderansicht auf eine Türblattbreitseite einer Ausführungsform eines Türblatts;

Fig. 2

eine Ansicht auf die schlossseitige Schmalstirnseite des Türblatts von links in Fig. 1 gesehen;

Fig. 3

eine Ansicht auf die bandseitige Schmalstirnseite des Türblatts von rechts in Fig. 1 gesehen;

Fig. 4

eine Draufsicht auf die obere Schmalstirnseite des Türblatts von oben in Fig. 1 gesehen;

Fig. 5

eine Unteransicht auf die untere Schmalstirnseite des Türblatts von unten in Fig. 1 gesehen;

Fig. 6

eine Detailansicht des Details VI in Fig. 3;

Fig. 7

einen Horizontalschnitt entlang der Linie VII-VII durch das Türblatt von Fig. 1;

Fig. 8

eine Detailansicht des Details VIII von Fig. 7;

Fig. 9

eine Detailansicht des Details IX von Fig. 7;

Fig. 10

einen Vertikalschnitt entlang der Linie X-X durch das Türblatt von Fig. 1;

Fig. 11

eine vergrößerte Detailansicht des Details XI von Fig. 10;

Fig. 12

eine vergrößerte Detailansicht des Details XII von Fig. 10;

Fig. 13

eine Ansicht aus dem Inneren eines Türblatthohlraums von Fig. 1 ohne Füllung entlang der Linie XIII-XIII in Fig. 1;

Fig. 14

einen Teil des Schnitts XIV-XIV von Fig. 1 ohne Füllung des Türblatts;

Fig. 15

eine perspektivische Explosionsansicht des Türblatts von Fig. 1 mit den einzelnen Teilen des Türblatts;

Fig. 16

ein vergrößerter Bereich aus der Darstellung von Fig. 15, der den unteren bandseitigen Bereich eines Kastenblechs des Türblatts näher darstellt;

Fig. 17

einen vergrößerten Bereich der Darstellung von Fig. 15 im Bereich der oberen Schmalstirnseite der Kastenblech-Konstruktion;

Fig. 18

einen vergrößerten Bereich der Darstellung von Fig. 15 im Bereich der unteren Schlossseite der Kastenkonstruktion; und

Fig. 19

einen vergrößerten Bereich der Darstellung von Fig. 15, die eine schlossseitige untere Ecke der Deckelblech-Konstruktion darstellt.

Embodiments of the invention will be explained in more detail with reference to the accompanying drawings. Show:

Fig. 1

a front view of a door leaf broad side of an embodiment of a door panel;

Fig. 2

a view of the lock-side narrow end side of the door leaf from the left in Fig. 1 seen;

Fig. 3

a view of the hinge-side narrow end side of the door panel from the right in Fig. 1 seen;

Fig. 4

a plan view of the upper narrow side of the door panel from above in Fig. 1 seen;

Fig. 5

a bottom view of the lower narrow end side of the door panel from below in Fig. 1 seen;

Fig. 6

a detail view of the detail VI in Fig. 3 ;

Fig. 7

a horizontal section along the line VII-VII through the door leaf of Fig. 1 ;

Fig. 8

a detailed view of the detail VIII of Fig. 7 ;

Fig. 9

a detailed view of the detail IX of Fig. 7 ;

Fig. 10

a vertical section along the line XX through the door leaf of Fig. 1 ;

Fig. 11

an enlarged detail view of the detail XI of Fig. 10 ;

Fig. 12

an enlarged detail view of detail XII of Fig. 10 ;

Fig. 13

a view from the inside of a door leaf cavity of Fig. 1 without filling along the line XIII-XIII in Fig. 1 ;

Fig. 14

a part of section XIV-XIV of Fig. 1 without filling the door panel;

Fig. 15

an exploded perspective view of the door leaf of Fig. 1 with the individual parts of the door leaf;

Fig. 16

an enlarged area from the illustration of Fig. 15 detailing the lower band-side area of a box panel of the door panel;

Fig. 17

an enlarged area of the representation of Fig. 15 in the area of the upper narrow end side of the box-plate construction;

Fig. 18

an enlarged area of the representation of Fig. 15 in the area of the lower lock side of the box construction; and

Fig. 19

an enlarged area of the representation of Fig. 15 , which represents a lock-side lower corner of the cover sheet construction.

In the accompanying figures, an embodiment of a door leaf 10 for a fire door in box-lid construction is shown. The door leaf 10 has a first sheet metal element 12 and a second sheet metal element 14. The two sheet metal elements 12, 14 are formed from sheet metal panels by folding. The first sheet metal element 12 forms a box 16; and the second sheet metal element forms a lid 18. Between the box 16 and the lid 18, a door leaf cavity 20 is formed, which is filled by a filling 22.

In Fig. 1 in this case the first door leaf broad side 24 formed by the second sheet metal element 14, ie the cover 18, is shown. In the Fig. 2 to 5 the four narrow end faces 26, 28, 30, 32 of the door leaf 10 are shown, wherein in FIGS. 2 and 3 vertically arranged narrow end faces 26, 28 and in the 4 and 5 horizontally to be arranged narrow end faces 30 and 32 are shown.

For example, the in Fig. 2 shown vertically to be arranged narrow end face 26, the lock side 34, which is approximately centrally provided with a lock receptacle 36 in which a door lock 38 with latch (latch) 40 and latch 42 is housed. For example, the in Fig. 3 shown vertically to be arranged narrow end face 28, the band side 44, which is provided with a first door hinge 46 and a second door hinge 47 and locking pin 48. In the Fig. 4 shown horizontally to be arranged narrow end face 30 is the top 50 and the in Fig. 5 shown horizontally to be arranged narrow end face 32 is the bottom 52, which is provided with a lower door groove 54. The door leaf 10 is designed rebated on three sides, wherein on the lid 18 a on the vertically to be arranged narrow end faces 26, 28 and the upper horizontal to be arranged narrow end face 30 projecting fold 56 is formed by gradation. The box 16 formed by the first sheet metal element 12 forms the second door leaf broadside 58.

The door leaf 10 is completely thermally separated carried out such that the sheet metal elements 12, 14 are connected only indirectly via a poor heat-conductive heat insulating material 60 compared to metal. For this purpose, a narrow gap 62 between the sheet metal elements 12, 14 is provided at the two narrow end faces 26, 28 to be arranged vertically and at the upper horizontally arranged narrow end side 30 and within the door groove 54 at the lower horizontally arranged narrow end side 32, so that the sheet metal elements 12, 14 do not touch. The sheet metal elements 12, 14 are here indirectly connected to one another via a filling element 64, 65, which is accommodated in side cavities 66, 68 provided in the region of the narrow end faces 26, 28, 30, 32. These side cavities 66, 68 will be discussed in more detail below.

In Fig. 6 is that in Fig. 3 shown detail of the connection of the door hinge 47 shown in more detail. The door hinge 47 has a door leaf side door frame part, which is attached to the hinge side 44.

Fig. 7 shows a horizontal section along the line VII-VII through the door leaf 10, wherein between the sheet metal elements 12, 14, the filling 22 is shown. The outermost side portions of the narrow end faces 26, 28, 30 are heat-insulated reinforced by further strips 152 of heat insulating material 60.

Fig. 8 shows the area of the lock receptacle 36 with the door lock 38 in section. The door lock 38 is protected by side plates 150 of heat insulating material 60.

Fig. 9 shows the detail IX of Fig. 7 with the first side cavity 66; Fig. 10 shows the section along the line XX through the entire door leaf 10 with filling and upper and lower portions of the narrow end faces 30, 32; and Fig. 11 shows a detail of the upper portion of the horizontally disposed narrow end face 30 with the first side cavity 66. The first side cavity 60 is filled with a first filling element 64. Fig. 12 shows the lower portion of the below-to-be-arranged narrow end face 32 with a different from the first side cavity 66 formed second side cavity 68. The second side cavity 68 is filled with a second filling element 65.

The formation of the side cavities 66, 68 and the filling elements 64, 65 inserted therein will be described below with reference to the illustrations in FIGS Fig. 9 . 11 and 12 explained in more detail.

The first filling element 64, which in Fig. 9 and Fig. 11 has a first strip 70 and a second strip 72 of filling material 74 formed by the thermal insulating material 60, with a reinforcing strip 76 of mechanically stronger resilient material than the thermal insulating material 60 sandwiched between the two strips 70, 72. For example, the reinforcing strip 76 is formed of sheet metal 78. The strip metal sheet 78 has a substantially smaller thickness than the two strips 70, 72 and is also provided transverse to the longitudinal extent of the strips 70, 72 with a smaller width than the two strips 70, 72.

The strips 70, 72 of heat insulating material 60 protrude on both sides of the reinforcing strip 76, so that no thermal bridge or cold bridge between the sheet metal elements 12, 14 is formed even when using metal sheet 78 as a reinforcing material.

The boundary of the side cavities 66, 68 are preferably formed by bending over side areas of the metal sheets forming the metal sheet elements 12, 14.

At the in Fig. 9 and 11 shown first side cavity 66, the boundary has a substantially C-profile structure 80 with a C-bar 82 and two C-legs 84, wherein at the formed on the narrow end faces 26, 28, 30 free ends of the C-leg 84 C directed towards each other Flanges 86 perpendicular to the C-legs 84 project towards each other and leave the gap 62 between them.

As in Fig. 11 indicated, the gap 62 has a width S, which is approximately in the range of the width F of each C-flange 86. For example, the width S of the gap 62 is about 1/3 (± 10%) of the total width (S + 2xF) of the first side cavity 66.

In a preferred embodiment, the C-profile structure 80, which forms the boundary of the first side cavity 66, is formed partly by an edge region 88 of the first metal sheet element 12 and partly by an edge region 90 of the second metal sheet element 14.

Preferably, each of these edge regions 88 is shaped in such a way that it projects from its narrow end face profile region 92, 94, which forms the respective outer surface of the narrow end side 26, 28, 30, inward toward the door leaf cavity 20, in each case into a U profile 96. 98 is formed.

The first U-profile 96 of the first metal sheet 12 has an outer U-leg 100, then a first U-web 102 and then an inner U-leg 104, wherein the U-leg 100 and the U-web 102 connecting them form a first U-profile groove 106 which is open to the second sheet metal element 14.

The edge region 90 of the second sheet metal element has a correspondingly complementary second U-profile 98 with a second outside U-leg 108, a second U-web 110 and a second inner U-leg 112. The two second U-legs 108, 112 and intermediate second U-web 110 together form a second U-profile groove 118 which is open to the first U-profile groove 106 out.

Fig. 13 shows a view from the inside of the door leaf cavity without filling seen on the C-bar 82 of the vertically arranged narrow end faces 26, 28 and Fig. 14 shows a view from the interior of the door leaf cavity without filling up on the C-bar 82 at the top to be arranged horizontally narrow end side 30. It can be seen that the inner U-legs 104, 112 of the two sheet metal elements 12, 14 complementary to each other sequences of projections 120a, 120b, 121 a, 121 b and recesses 122a, 122b, 123a, 123b which engage with each other. In this case, the first projections 120a, 120b of the edge region 88 of the first metal sheet element engage in the second recesses 123a, 123b of the edge region 90 of the second metal sheet element, while the second projections 121a, 121b formed on the second metal sheet element 14 engage in the first recesses 122a, 122b intervene. It's still the one Fig. 13 and 14 can be seen that between the projections 120a, 120b, 121 a, 121 b and the recesses 122a, 122b, 123a, 123b, a minimum distance A is present, so that the edge portions 88, 90 of the sheet metal elements 12, 14 do not touch.

As in Fig. 13 illustrated by the example of the vertically arranged end faces, the projections 120a, 121a and the recesses 122a, 123a may be bounded rectangular. The example of in Fig. 14 illustrated above horizontal to be arranged end face 30 is shown that the projections 120b, 121b and the recesses 122b, 123b may also be shaped trapezoidal with oblique transitions, so that the projections 120b, 121b and the recesses 122b, 123b engage behind a form fit and at a moving apart of the metal sheets, eg in case of fire, can hook each other.

Like from the Fig. 13 and 14 As can be seen, engage the inner U-legs 104, 112 respectively with projections / recesses into each other and together form the C-bar 82. One of the C-leg 84 is through the first U-web 102, and the other C-leg 84 is through formed the second U-web 110. The C-flanges 86 are formed by the outboard U-legs 100, 108 which are fully folded back on the narrow-end profile section 92, 94 such that the C-flanges 86 are reinforced by double folding.

In Fig. 13 and 14 fasteners 124, in particular formed by self-drilling screws 126, indicated that connect the respective projections 120a, 120b, 121 a, 121 b with the first filling element 64 and reach there in particular in the metal sheet 78 of the reinforcing strip 76. Since the reinforcing strip 76 is surrounded by heat insulating material 60, it is thermally insulated from the sheet metal elements 12, 14. This results in an indirect attachment of the sheet metal elements 12, 14 only on the filling material of the filling element 64th

At the in Fig. 12 shown lower narrow end side region 32 is a different from the first side cavity 66 second side cavity 78 which is filled by a second filling member 65. This second filling element is simply formed from a strip of heat insulating material 60.

The door groove 54 is formed by folding back the first lower edge portion 128 of the first sheet metal member 12 from the main portion forming the second door sheet broadside 58 by 180 ° so as to form a double-folded lower profile edge portion 130, followed by 90 ° bending in that the edge region 128 extends further in the thickness direction and forms the groove base 132 of the door groove 54. This groove base 132 is not carried out all the way to the second sheet metal element 14, but ends at a distance from this.

The second lower edge region 33 of the second metal sheet 14, starting from the main area forming the first door leaf broad side 24, is first bent by 90 ° in the thickness direction to form an outermost lower profile area 134 form; This is followed by a step formation 136 with two step flanks 138, 140, whereupon the second lower edge region 133 has an edge end strip 142 reaching upwards. The edge end strip 142 is designed to terminate at a distance from the groove base 132, so that here the gap 62 is formed between the sheet metal elements 12, 14. Thereby, the second side cavity 68 is bounded on its upper side by the groove base 132 and is encompassed on its other three sides by the second lower edge region 133 of the second sheet metal element 14. The second lower edge portion 133 is secured to the first lower edge portion 128 by a series of fasteners 124, such as drill screws 126. Here, in each case between a screw head 144 and the second lower edge region 133, for example between the screw head 144 and the stepped edge 140, a ring 146 of heat insulating material 60 is inserted in the manner of a washer.

The 15 to 19 10 shows an exploded perspective view of the door leaf 10 with the first sheet metal element 12, the second sheet metal element 14 of the filling 22 and the elements of additional heat insulation material 60.

The filling 22 is formed for example by a mineral fiber plate 148, which is glued to the door leaf broad sides 24, 58 over a large area with the inner sides of the sheet metal elements 12, 14. As thermal insulation material 60 strips of a mineral fire protection plate, in particular preferably based on vermiculite are preferably formed. For example, the company Knauf offers a corresponding fire protection board under the brand name "Thermax" on the market. From such a mineral plate, the strips 70, 72 of the first filling element 64 and the second filling element 65 are cut. The lock receptacle 36 is also isolated from this heat insulation material 60 by small plate elements 150. Additional strips 152 of this heat insulating material 60 are arranged around the C-profile structures 80 around, as shown in particular from Fig. 9 and 11 as well as 14 and the Fig. 15 . 16 and 18 and 17.

The area of the seam 46 is also replaced by such additional strips 152, which have an in Fig. 15 form frame 154 made of the heat insulating material 60, filled.

In the manufacture of the sheet metal elements 12, 14, the U-profiles 96, 98 are formed from sheet metal panels by cold forming of the edge regions, starting from outside to inside. Finally, the pressing of the double folds of the C-flanges 86 takes place.

Overall, thus formed from cost-effective materials door leaf 10 is created, which can also meet high fire protection classes and is additionally designed to be particularly heat-insulating. The door leaf 10 can thus be used in particular as a door between rooms with large temperature differences, for example as a conclusion between a living area and a garage or as an outer door and contributes through the complete thermal separation between the door leaf broadsides 24, 58 for energy saving.

Due to the formation of the side cavities 66, 68 by profile structures 80, 96, 98 results in a high rigidity of the door leaf 10, which is further stiffened by the running along the narrow end faces 26, 28, 30 reinforcing strip 76. The sandwich structure contributes to an additional stiffening by gluing the metal sheet elements 12, 14 to the filling 22.

• Die Erfindung betrifft ein Türblatt 10 in Kasten-Deckelbauweise, insbesondere Feuerschutz-Türblatt, mit einem ersten und einem zweiten jeweils aus einer Metallblechtafel gebildeten Metallblechelement 12, 14, die zusammen einen Türblatthohlraum 20 umschließen, und mit einer in dem Türblatthohlraum 20 eingefügten Füllung 22, wobei an wenigstens einer Schmalstirnseite 26, 28, 30, 32 des Türblatts 10 Randbereiche 88, 90; 128, 133 der Metallblechelemente 12, 14 einen sich in Längsrichtung der wenigstens einen Schmalstirnseite 26, 28, 30, 32 erstreckenden, von den Randbereichen 88, 90; 128, 133 umgriffenen Seitenhohlraum 66, 68 bilden, der durch ein Füllmaterial 74, das thermisch schlechter als das Metallblech leitet, befüllt ist, wobei die den Seitenhohlraum 66, 68 umgebenden Randbereiche der Metallblechelemente 12, 14, ohne dass sich die Metallblechelemente 12, 14 einander direkt berühren, mittelbar über das Füllmaterial 74 miteinander verbunden sind. Dadurch wird mit einfachen Mitteln und wenig Metallmaterial ein vollständig thermisch getrenntes Türblatt 10 mit besonderer Steifheit ermöglicht.

In summary it can be said:

• The invention relates to a door leaf 10 in a box-lid construction, in particular fire protection door leaf, with a first and a second sheet metal element 12, 14 respectively formed from a sheet metal panel, which together enclose a door leaf cavity 20, and with an inserted in the door leaf cavity 20 filling 22, wherein on at least one narrow end face 26, 28, 30, 32 of the door leaf 10 edge regions 88, 90; 128, 133 of the sheet metal elements 12, 14 extending in the longitudinal direction of the at least one narrow end side 26, 28, 30, 32, of the edge regions 88, 90; 128, 133 Side cavity 66, 68 which is filled by a filling material 74, which conducts thermally worse than the metal sheet, wherein the edge portions of the sheet metal elements 12, 14 surrounding the side cavity 66, 68, without the sheet metal elements 12, 14 directly touching each other, indirectly connected to each other via the filling material 74. As a result, a completely thermally separated door leaf 10 with particular rigidity is made possible by simple means and with little metal material.

LIST OF REFERENCE NUMBERS

10

door leaf

12

first sheet metal element

14

second sheet metal element

16

box

18

cover

20

Door leaf cavity

22

filling

24

first door leaf broadside

26

Vertical narrow side to be arranged

28

Vertical narrow side to be arranged

30

horizontal narrow side to be arranged

32

horizontal narrow side to be arranged

34

lock side

36

Castle recording

38

Locks

40

Cases

42

bars

44

hinge side

46

first door hinge

47

second door hinge

48

safety bolt

50

top

52

bottom

54

Türnut

56

fold

58

second door leaf broadside

60

Thermal insulation material

62

gap

64

first filling element

65

second filling element

66

first side cavity

68

second side cavity

70

first strip

72

second strip

74

filling material

76

reinforcement strips

78

metal sheet

80

C-profile structure

82

C-Steg

84

C-leg

86

C-flanges

88

Edge region first metal sheet element

90

Edge region second metal sheet element

92

Narrow end side profile area first metal sheet

94

Narrow end side profile area first metal sheet

96

first U-profile

98

second U-profile

100

first outside U-leg

102

first underground bridge

104

first inner U-thigh

106

first U-profile groove

108

second outside U-leg

110

second underground bridge

112

second inner U-thigh

118

second U-profile groove

120a

first projections (on vertical end faces)

120b

first projections (on top to be arranged horizontally at the top)

121

second projections (on vertical end faces)

121b

second projections (on top to be arranged horizontally at the top)

122a

first recesses (at vertical end faces)

122b

first recesses (on top to be arranged horizontally at the top)

123a

second recesses (at vertical end faces)

123b

second recesses (on top side to be arranged horizontally)

124

fasteners

126

Drilling screws

128

first lower edge area

130

lower profile edge area

132

groove base

133

second lower border area

134

lower profile area

136

step formation

138

step flank

140

step flank

142

Randendstreifen

144

screw head

146

ring

148

Mineral fibreboard

150

panel member

152

additional stripes

154

Frame made of heat insulation material

S

gap width

F

Wide C flange

A

minimum distance

Claims (15)

Door leaf (10) in a box-lid construction, in particular fire protection door leaf, comprising first and second metal sheet elements (12, 14) each formed from a sheet metal panel, which together enclose a door leaf cavity (20), and with a door leaf cavity (20). inserted filling (22), wherein at least one narrow end face (26, 28, 30, 32) of the door leaf (10) edge regions (88, 90, 128, 133) of the sheet metal elements (12, 14) extending in the longitudinal direction of the at least one narrow end face (26, 28, 30, 32) forming, surrounded by the edge regions (88, 90, 128, 133) side cavity (66, 68), which is filled by a filler material (74), which conducts thermally worse than the metal sheet in that the edge regions of the metal sheet elements (12, 14) surrounding the side hollow space (66, 68) are indirectly connected to one another via the filler material (74) without the metal sheet elements (12, 14) touching each other directly. Door leaf according to claim 1,
characterized,
in that at least one of the side cavities is filled with a filling element (64) comprising a first strip (70) of heat insulating material (60) and a second strip (72) of heat insulating material (60) as filling material and additionally a reinforcing strip (76) between the first strip (70) and the second strip (72) is embedded. Door leaf according to claim 2,
characterized,
in that the reinforcing strip (76) is formed of metal and is of smaller width than the strips (70, 72) of heat insulating material (60), wherein the strips (70, 72) of heat insulating material, preferably on both sides, project beyond the reinforcing strip (76). Door leaf according to one of the preceding claims,
characterized,
in that the edge region (8, 90) of at least one of the sheet metal elements (12, 14) forms a U-profile (96, 98) forming in a part of the narrow end face (26, 28, 30, 32) Thickness direction of the door leaf (10) extending, preferably formed by a double folding, profile region (92, 94, 86) of the sheet metal element (12, 14) inwardly to the door leaf cavity (20) directed towards. Door leaf according to claim 4,
characterized,
in that both the edge region (88) of the first sheet metal element (12) and the edge region (90) of the second sheet metal element (14) are formed in a U-profile with U-profile grooves (106, 118) open to one another, so that the U-profile grooves ( 106, 118) together form the side cavity (68). Door leaf according to one of the preceding claims,
characterized,
in that the side cavity (68) is enclosed overall by a C-profile structure (80) formed by the edge regions (88, 90) of the sheet metal elements (12, 14). Door leaf according to one of the preceding claims,
characterized,
that the edge regions (88, 90) of the sheet metal elements (12, 14) seen in narrow end side longitudinal direction complementary to each other formed successions of projections (120a, 120b, 121 a, 121 b) and recesses (122a, 122b, 123a, 123b), said Protrusions (120a, 120b) of the one sheet metal element (12) into the recesses (123a, 123b) of the other Sheet metal elements (14) non-contact, in particular at a distance, intermesh. Door leaf according to claim 7,
characterized,
in that the succession of projections (120a, 120b, 121a, 121b) and recesses (122a, 122b, 123a, 123b) are formed by rectangular or trapezoidal notches on the outermost edge strips of the metal sheets forming the sheet metal elements (12, 14). Door leaf according to claim 7 or claim 8,
characterized,
in that the projections (120a, 120b, 121a, 121b) are each fastened to the filling material (74) by at least one fastener (124), in particular a screw, more particularly a drilling screw (126). Door leaf according to one of the preceding claims,
characterized by at least one of the following features a) to d), a) that the filling material is formed by strips (70, 72) of fire protection material on a mineral basis, in particular of mineral fiber board or of a vermiculite material; b) that the at least one end-side side cavity (66, 68) by repeatedly bending over the edge regions (88, 90, 128, 133) is formed; c) that the at least one narrow side, filled with the filling material side cavity (66) to the outside through a narrow end face extending gap (62) is open, the width of which is smaller, in particular at least half smaller than the extent of the side cavity in Thickness direction is;
and or d) that the filling (22) by a mineral fiber plate (148) is formed and that the filling (22) and the sheet metal elements (12, 14) are cohesively interconnected over a large area, in particular glued together over a large area. Door leaf according to one of the preceding claims,
characterized,
in that at least the two narrow end faces (26, 28) to be arranged vertically and a narrow end face (30) to be arranged horizontally above each are formed with the side cavity (66) extending longitudinally over the entire narrow end face. Door leaf according to one of the preceding claims,
characterized,
in that a lateral cavity (66, 68) is provided along all the narrow end faces (26, 28, 30, 32) along their entire extension, wherein in a narrow end face (26, 28) to be arranged vertically and the narrow end face ( 30) provided first side cavity (66) a first filling element (64) with the filler (74) from the edge regions of both the first and the second sheet metal element is overlapped on the outside, while with a second filling element (65) filled second side cavity (68) at the below to be arranged horizontally narrow end face (32) on the outside only by the edge region (133) of only one of the sheet metal elements (14) is encompassed, wherein between the lower second side cavity (68) and the main extension plane of the other sheet metal element (12) has a lower downwardly open Door groove (54) is formed. Method for producing a door leaf (10) according to one of the preceding claims, characterized by the steps: a) providing a first sheet metal panel for forming the first sheet metal member (12) and a second sheet metal panel for forming the second sheet metal member (14), c) folding over edge regions (88, 90) of the metal sheet panels to form a U-profile structure (96, 98), d) folding the entire U-profile structure and pressing to form a double fold forming part of the outer narrow face side surface. Method according to claim 13,
characterized by the step to be performed before step c): b) notching of reshaped edge regions (88, 90) of the metal sheet panels to provide along the edge succession of projections (120a, 120b, 121 a, 121 b) and recesses (122a, 122b, 123a, 123b), the successions of protrusions (120a, 120b, 121a, 121b) and recesses (122a, 122b, 123a, 123b) on the first and second metal sheets are formed complementary to each other. Method according to one of claims 13 or 14,
characterized by the steps: e) inserting a filling element (64) into the U-profile structure, f) inserting and bonding a filling (22) into a door leaf cavity (20) of the first metal sheet element (12) remaining between the U-profile structures, g) placing and bonding the second sheet metal element (14) on the filling (22).

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