DE102011056090A1 - DOOR LEAF AND METHOD OF MANUFACTURING - Google Patents

Abstract

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

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 edge portions of the sheet metal elements form a longitudinally narrow end face extending, encompassed by the edge regions side cavity, which is filled by a filler which conducts thermally worse than the metal sheet, wherein the surrounding the side cavity edge portions of the sheet metal elements without the sheet metal elements touch each other directly, are indirectly connected to each other via the filler.

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 narrow end side longitudinal direction complementary to each other formed successions 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 mesh.

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-end side, filled with the filling material side cavity is open to the outside through an extending over the narrow end side gap whose width is smaller, in particular at least half is 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 are each formed with the side cavity extending longitudinally over the entire narrow end face.

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 ) in the U-profile structure,
• f) insertion and bonding of a filling ( 22 ) in a remaining between the U-profile structures Türblatthohlraum ( 20 ) of the first sheet metal element ( 12 )
• g) fitting and gluing 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) are inserted with metal strips 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, the sheets can hook behind and so 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 making the succession of projections and recesses are made, then the notched plates are folded, then folded the U-webs and U-legs, then the double folding with pressing takes place.

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.

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

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

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

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

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

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

6 a detail view of the detail VI in 3 ;

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

8th a detailed view of the detail VIII of 7 ;

9 a detailed view of the detail IX of 7 ;

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

11 an enlarged detail view of the detail XI of 10 ;

12 an enlarged detail view of detail XII of 10 ;

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

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

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

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

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

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

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

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

In 1 Here is the through the second sheet metal element 14 ie the lid 18 , made first door leaf broadside 24 shown. In the 2 to 5 are the four narrow ends 26 . 28 . 30 . 32 of the door leaf 10 shown, in 2 and 3 Vertical narrow sides to be arranged 26 . 28 and in the 4 and 5 horizontal narrow sides to be arranged 30 and 32 are shown.

For example, the in 2 shown vertical to be arranged narrow end face 26 the lock side 34 which is roughly in the middle with a lock receptacle 36 is provided, in which a door lock 38 with trap (catch) 40 and bars 42 is housed.

For example, the in 3 shown vertical to be arranged narrow end face 28 the band side 44 , which with a first door hinge 46 and a second door hinge 47 and safety bolts 48 is provided. In the 4 shown horizontally to be arranged narrow end face 30 is the top 50 and the in 5 shown horizontally to be arranged narrow end face 32 is the bottom 52 that with a bottom door groove 54 is provided. The door leaf 10 is designed rebated on three sides, with the lid 18 one on the vertical to be arranged narrow end faces 26 . 28 and the upper narrow side to be arranged horizontally 30 above fold 56 is formed by grading. The through the first sheet metal element 12 formed box 16 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 only indirectly via a poor heat-conductive heat insulation material compared to metal 60 are connected. For this purpose, at the two narrow end faces to be arranged vertically 26 . 28 as well as on the upper horizontal side to be arranged narrow end face 30 and inside the door groove 54 at the lower horizontal end to be arranged 32 a narrow gap 62 between the sheet metal elements 12 . 14 provided so that the Sheet metal elements 12 . 14 do not touch. The sheet metal elements 12 . 14 are here about a filling element 64 . 65 indirectly connected to each other, which in in the region of the narrow end faces 26 . 28 . 30 . 32 provided side cavities 66 . 68 is housed. On these side cavities 66 . 68 will be discussed in more detail below.

In 6 is that in 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 on the hinge side 44 is attached.

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 areas of the narrow end faces 26 . 28 . 30 are through more stripes 152 made of thermal insulation material 60 reinforced thermally insulated trained.

8th shows the area of the lock recording 36 with the door lock 38 on average. The door lock 38 is through side plates 150 made of thermal insulation material 60 protected.

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

The formation of the side cavities 66 . 68 as well as the filling elements used therein 64 . 65 is described below with reference to the representations in the 9 . 11 and 12 explained in more detail.

The first filling element 64 which is in 9 and 11 is shown, has a first strip 70 and a second strip 72 out through the heat insulation material 60 formed filling material 74 on, being a reinforcing strip 76 made of mechanically stronger material than the thermal insulation material 60 between the two strips 70 . 72 is embedded. For example, the reinforcing strip 76 made of sheet metal 78 educated. The strip of sheet metal 78 has a much smaller thickness than the two strips 70 . 72 and is also transverse to the longitudinal extent of the strips 70 . 72 with a smaller width than the two strips 70 . 72 Mistake.

The Stripes 70 . 72 made of thermal insulation material 60 Stand on both sides of the reinforcing strip 76 so that even when using sheet metal 78 as a reinforcing material no thermal bridge or cold bridge between the sheet metal elements 12 . 14 arises.

The border of the side cavities 66 . 68 are preferably by Umkantungen of side portions of the sheet metal elements 12 . 14 forming metal panels.

At the in 9 and 11 illustrated first side cavity 66 The border essentially has a C-profile structure 80 with a C-bridge 82 and two C-thighs 84 , where at the narrow end faces 26 . 28 . 30 formed free ends of the C-thighs 84 directed towards each other C-flanges 86 perpendicular to the C-thighs 84 abut each other and the gap 62 between them.

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

In a preferred embodiment, the C-profile structure 80 that the boundary of the first side cavity 66 forms, partly by a border area 88 the first sheet metal element 12 and partly by a border area 90 the second sheet metal element 14 educated.

Preferably, each of these border areas 88 shaped so that he from his the respective outer surface of the narrow end face 26 . 28 . 30 forming, extending in the thickness direction of the door leaf Schmalstirnseitenprofilbereich 92 . 94 inside to the door leaf cavity 20 directed towards a U-profile 96 . 98 is formed.

The first U-profile 96 of the first metal sheet 12 has an outside U-leg 100 , followed by a first U-bridge 102 and then an inner U-leg 104 , where the U-legs 100 and the connecting this U-web 102 a first U-profile groove 106 forming the second sheet metal element 14 is open.

The border area 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-thighs 108 . 112 and the one in between lying second U-bridge 110 together form a second U-profile groove 118 leading to the first U-profile groove 106 is open.

13 shows a view from the inside of the door leaf cavity without filling seen on the C-bridge 82 the vertical narrow sides to be arranged 26 . 28 and 14 shows a view from the inside of the door leaf cavity without filling up on the C-bar 82 at the upper narrow side to be arranged horizontally 30 , It can be seen that the inner U-legs 104 . 112 the two sheet metal elements 12 . 14 complementary to each other consequences of protrusions 120a . 120b . 121 . 121b and returns 122a . 122b . 123a . 123b have, which interlock. The first projections grip 120a . 120b of the border area 88 of the first sheet metal element in the second recesses 123a . 123b of the border area 90 of the second sheet metal element, while those on the second sheet metal element 14 formed second protrusions 121 . 121b in the first returns 122a . 122b intervention. It's still the one 13 and 14 to see that between the protrusions 120a . 120b . 121 . 121b and the returns 122a . 122b . 123a . 123b a minimum distance A is present so that the edge areas 88 . 90 the sheet metal elements 12 . 14 do not touch.

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

Like from the 13 and 14 Obviously, the inner U-thighs grip 104 . 112 corresponding with projections / recesses into each other and together form the C-bridge 82 , One of the C-thighs 84 is through the first underground bridge 102 , and the other C-leg 84 is through the second underground bridge 110 educated. The C-flanges 86 be through the outside U-legs 100 . 108 formed entirely on the narrow-face profile area 92 . 94 folded back so that the C-flanges 86 are formed reinforced by double folding.

In 13 and 14 are fasteners 124 , in particular formed by self-drilling screws 126 , indicated that the respective projections 120a . 120b . 121 . 121b with the first filling element 64 connect and there in particular in the metal sheet 78 of the reinforcing strip 76 hineingreifen. Because the reinforcing strip 76 of thermal insulation material 60 is surrounded, 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 over the filling material of the filling element 64 ,

At the in 12 shown lower narrow end side area 32 is one to the first side cavity 66 different second side cavity 78 formed by a second filling element 65 is filled. This second filling element is simply made of a strip of heat insulating material 60 educated.

The door groove 54 is formed by the first lower edge region 128 the first sheet metal element 12 starting from the second door leaf broadside 58 folding main area by 180 °, so as to have a double-folded lower profile edge area 130 to form, it follows a fold around 90 °, so that the edge area 128 further extends in the thickness direction and the groove bottom 132 the door groove 54 forms. This groove bottom 132 is not quite up to the second sheet metal element 14 carried out, but ends at a distance from this.

The second lower edge area 33 of the second metal sheet 14 is starting from which the first door leaf broadside 24 forming main area initially bent by 90 ° in the thickness direction to an outermost lower profile area 134 to build; then follows a step education 136 with two steps 138 . 140 , whereupon the second lower edge area 133 an upwardly reaching border strip 142 having. The border strip 142 is at a distance from the groove bottom 132 executed ending, so here the gap 62 between the sheet metal elements 12 . 14 is trained. This is the second side cavity 68 on its upper side by the groove bottom 132 is limited and is on its other three sides by the second lower edge area 133 the second sheet metal element 14 encompassed. The second lower edge area 133 is with the first lower edge area 128 through a series of, for example, as self-drilling screws 126 trained fastener 124 attached. Here is between each a screw head 144 and the second lower edge area 133 , for example, between the screw head 144 and the step flank 140 , a ring 146 made of thermal insulation material 60 inserted in the manner of a washer.

The 15 to 19 show an exploded perspective view of the door panel 10 with the first sheet metal element 12 , the second Sheet metal element 14 the filling 22 and the elements of additional thermal insulation material 60 ,

The filling 22 is for example through a mineral fiber plate 148 formed on the door leaf broadsides 24 . 58 large area with the inner sides of the sheet metal elements 12 . 14 is glued. As a thermal insulation material 60 are preferably strips of a mineral fire protection plate, in particular preferably formed on the basis of vermiculite. For example, the company Knauf offers a corresponding fire protection plate under the brand name "Thermax" on the market. From such a mineral plate are the stripes 70 . 72 of the first filling element 64 and the second filling element 65 cut. Also the castle recording 36 is made by small plate elements 150 from this thermal insulation material 60 isolated. Additional stripes 152 from this thermal insulation material 60 become around the C-profile structures 80 arranged around, as this particular from the 9 and 11 such as 14 and the 15 . 16 and 18 such as 17 evident.

The area of the fold 46 is also due to such additional stripes 152 who have a in 15 illustrated frame 154 from the thermal insulation material 60 form, filled out.

In the production of sheet metal elements 12 . 14 From sheet metal panels by cold forming the edge areas are the U-profiles 96 . 98 formed by transformations starting from the outside inwards. Finally, pressing the double folds of the C-flanges takes place 86 ,

Overall, therefore, a door panel formed from inexpensive materials 10 created, which can also meet high fire protection classes and is also designed to be particularly heat-insulating. The door leaf 10 can 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 to save energy.

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

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 metal sheet element each formed from a sheet metal panel 12 . 14 which together form a door leaf cavity 20 enclose, and with one in the door leaf cavity 20 inserted filling 22 , wherein on at least one narrow end face 26 . 28 . 30 . 32 of the door leaf 10 border areas 88 . 90 ; 128 . 133 the sheet metal elements 12 . 14 a in the longitudinal direction of the at least one narrow end face 26 . 28 . 30 . 32 extending, from the edge areas 88 . 90 ; 128 . 133 engulfed side cavity 66 . 68 form, by a filling material 74 , which conducts thermally worse than the metal sheet, is filled, with the side cavity 66 . 68 surrounding edge regions of the sheet metal elements 12 . 14 without the sheet metal elements 12 . 14 Touch each other directly, indirectly over the filler material 74 connected to each other. As a result, with simple means and little metal material, a completely thermally separated door leaf 10 with special stiffness allows.

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 (18)

Door leaf ( 10 ) in a box-lid construction, in particular fire-protection door leaf, with a first and a second metal sheet element each formed from a sheet metal panel ( 12 . 14 ), which together form a door leaf cavity ( 20 ) and with one in the door leaf cavity ( 20 ) inserted filling ( 22 ), wherein at least one narrow end face ( 26 . 28 . 30 . 32 ) of the door leaf ( 10 ) Border areas ( 88 . 90 ; 128 . 133 ) of the sheet metal elements ( 12 . 14 ) in the longitudinal direction of the at least one narrow end face ( 26 . 28 . 30 . 32 ) extending from the peripheral areas ( 88 . 90 ; 128 . 133 ) encompassed side cavity ( 66 . 68 ) formed by a filling material ( 74 ), which conducts thermally worse than the metal sheet, is filled, whereby the side cavity ( 66 . 68 ) surrounding edge regions of the sheet metal elements ( 12 . 14 ), without the sheet metal elements ( 12 . 14 ) directly touching each other, indirectly via the filling material ( 74 ) are interconnected. Door leaf according to claim 1, characterized in that at least one of the side cavities with a filling element ( 64 ), which is a first strip ( 70 ) of heat insulating material ( 60 ) and a second strip ( 72 ) of heat insulating material ( 60 ) as filler material and additionally a reinforcing strip ( 76 ) located between the first strip ( 70 ) and the second strip ( 72 ) is embedded. Door leaf according to claim 3, characterized in that the reinforcing strip ( 76 ) is formed of metal and of smaller width than the strips ( 70 . 72 ) of heat insulating material ( 60 ), the strips ( 70 . 72 ) of heat insulating material, preferably on both sides, over the reinforcing strip ( 76 ) protrude. Door leaf according to one of the preceding claims, characterized in that the edge region ( 8th . 90 ) at least one of the sheet metal elements ( 12 . 14 ) a U-profile ( 96 . 98 ), which adjoins a part of the narrow end face ( 26 . 28 . 30 . 32 ) in a thickness direction of the door leaf ( 10 ) extending, preferably formed by a double folding profile range ( 92 . 94 ; 86 ) of the sheet metal element ( 12 . 14 ) inwardly to the door leaf cavity ( 20 ). Door leaf according to claim 4, characterized in that both the edge region ( 88 ) of the first sheet metal element ( 12 ) as well as the edge area ( 90 ) of the second sheet metal element ( 14 ) U-profile with mutually open U-profile grooves ( 106 . 118 ) are formed so that the U-profile grooves ( 106 . 118 ) together the side cavity ( 68 ) form. Door leaf according to one of the preceding claims, characterized in that the side cavity ( 68 ) in total by one through the edge regions ( 88 . 90 ) of the sheet metal elements ( 12 . 14 ) formed C-profile structure ( 80 ) is enclosed. Door leaf according to one of the preceding claims, characterized in 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 succession of projections ( 120a . 120b . 121 . 121b ) and returns ( 122a . 122b . 123a . 123b ), the projections ( 120a . 120b ) of a sheet metal element ( 12 ) in the recesses ( 123a . 123b ) of the other sheet metal element ( 14 ) non-contact, in particular at a distance, intermesh. Door leaf according to claim 7, characterized in that the succession of projections ( 120a . 120b . 121 . 121b ) and returns ( 122a . 122b . 123a . 123b ) by rectangular or trapezoidal notches on the outermost edge strips of the sheet metal elements ( 12 . 14 ) forming metal sheets are formed. Door leaf according to claim 7 or claim 8, characterized in that the projections ( 120a . 120b . 121 . 121b ) by at least one fastener ( 124 ), in particular screw, more particularly drilling screw ( 126 ), to the filling material ( 74 ) are attached. Door leaf according to one of the preceding claims, characterized in that the filling material is provided by strips ( 70 . 72 ) of fire protection material on a mineral basis, in particular of mineral fiber board or of a vermiculite material is formed. Door leaf according to one of the preceding claims, characterized in that the at least one end-side side cavity ( 66 . 68 ) by repeatedly bending over the edge regions ( 88 . 90 ; 128 . 133 ) is trained. Door leaf according to one of the preceding claims, characterized in that the at least one narrow-side, filled with the filling material side cavity ( 66 ) to the outside through a gap extending over the narrow end face ( 62 ) is open, whose width is smaller, in particular at least half smaller than the extension of the side cavity in the thickness direction. Door leaf according to one of the preceding claims, characterized in that the filling ( 22 ) through a mineral fiber board ( 148 ) is formed and that the filling ( 22 ) and the sheet metal elements ( 12 . 14 ) are cohesively connected to each other over a large area, in particular adhesively bonded to one another 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 ) and a top face to be arranged horizontally ( 30 ) each with the longitudinal cavity over the entire narrow end side extending side cavity ( 66 ) are formed. Door leaf according to one of the preceding claims, characterized in that on all narrow end faces ( 26 . 28 . 30 . 32 ) each have a side cavity ( 66 . 68 ) is provided along its entire extent, wherein in a to be arranged vertically to the narrow end faces ( 26 . 28 ) and the above to be arranged horizontally narrow end face ( 30 ) provided first side cavity ( 66 ) a first filling element ( 64 ) with the filling material ( 74 ) is externally overlapped by the edge regions of both the first and the second sheet metal element, while one 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 ) only one of the sheet metal elements ( 14 ), wherein between the lower second side cavity ( 68 ) and the main extension plane of the other sheet metal element ( 12 ) a lower downwardly open door groove ( 54 ) is trained. Method for producing a door leaf ( 10 ) according to one of the claims, characterized by the steps of: a) providing a first sheet metal panel for forming the first sheet metal element ( 12 ) and a second sheet metal panel for forming the second sheet metal member (FIG. 14 ), c) folding over edge areas ( 88 . 90 ) of the metal sheet panels for forming 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 16, characterized by the step to be carried out before step c): b) notching of edge regions to be reshaped ( 88 . 90 ) of the sheet metal panels around a succession of projections ( 120a . 120b . 121 . 121b ) and returns ( 122a . 122b . 123a . 123b ), the sequences of projections ( 120a . 120b . 121 . 121b ) and returns ( 122a . 122b . 123a . 123b ) are formed on the first and the second metal sheet complementary to each other. Method according to one of claims 16 or 17, characterized by the steps: e) insertion of a filling element ( 64 ) in the U-profile structure, f) insertion and bonding of a filling ( 22 ) in a remaining between the U-profile structures Türblatthohlraum ( 20 ) of the first sheet metal element ( 12 g) placing and gluing the second sheet metal element ( 14 ) on the filling ( 22 ).

Images