EP2878754B1 - Fire door leaf for a single or multi-leaf fire door - Google Patents

Description

The invention relates to a fire protection door wing, in particular from load-bearing cladding sheets with a filling therein, for a single-leaf or multi-leaf fire protection door.

A multi-leaf fire door is, for example, from the DE 196 49 443 B4 known. This publication relates to a fire protection door with a first door leaf and a second door leaf, the door leaves having a cover plate and a box plate as jacket plates. A active leaf is provided with a lock with a catch, which can snap into a counter bearing on the passive leaf. In contrast to the hinge-side end faces, the end faces with lock or counter bearing are referred to below as lock-side end faces. On these lock-side end faces, both door wings face the DE 196 49 443 B4 a U-shaped profile design on and on the opposite broad side a step-shaped recess. When the door is closed, the U-shaped profile configuration is received in the step-shaped recess of the other door leaf. The other door leaf in its stepped recess lying on the metal sheet has a seal made of foam material in the event of fire, which serves to foam the door gap between the two fire doors in the event of fire. These seals are obviously glued to the metal sheets and are used only for sealing purposes.

From the DE 41 36 155 A1 a wicket door with a door leaf and a frame is known. The wicket door is, for example, part of a fire protection sliding gate and should also be able to serve as an escape door, which is why it should be designed without a wicket threshold.

The U.S. 4,937,978 A. discloses a metal door construction that has two metal panels. The panels form folded sections which extend in parallel and can touch one another in an abutting area. The metal door construction is used in fire protection doors.

The DE 20 2011 004 674 U1 shows a fire door with at least one door leaf and a frame. On the side of the door, a door rebate is arranged, which includes locking elements. The locking elements can partially engage in recesses, such as the frame.

AT 403 498 discloses a fixing device for fire doors with at least one door leaf. The fixing device comprises a fixing element which fixes the door leaves against one another in the basic state with the end face of one of the door leaves. The fixing element is guided in a guide essentially in the plane of the receiving door leaf. The fixing element is subjected to a force by an elastic element in the direction of the other door leaf. The fixing element is secured in the basic state by a material melting above a predetermined limit temperature. To ensure that the fixing device triggers safely and reliably in the event of a fire and that secure fixing is ensured, the fixing element is designed as a displaceable bolt, the surface of which is provided with a sawtooth-like structure which increases the holding effect. Advantageously, the area of the recess in the second door leaf that is intended to interact with the bolt has a structure that is congruent with the surface structure.

EP 2 395 192 A1 describes a fire protection door wing according to the preamble of claim 1.

Fire protection door designs must be approved by the building authorities. For this purpose, the manufacturers of fire protection doors must carry out standardized fire tests with a new construction, which prove the fire protection properties. For this purpose, the fire protection doors with frame and door leaf are installed in a test wall and installed on a test furnace in order to apply heat to them from one side for the prescribed duration of protection. For example, a class T30 fire door must withstand at least 30 minutes. If there are flames during the fire test or if the fire protection door on the side facing away from the fire becomes impermissibly hot, then this is the Fire test failed. Approval is only given after proof of a fire test.

In fire protection doors, the door leaves of which are made of sheet metal with fillings, the so-called "bi-metal effect" occurs during such fire tests. The jacket sheet facing the fire expands more than the sheet facing away from the fire due to the greater heat. Due to the different thermal expansion, the entire door leaf of the door leaf is under considerable tension and bends accordingly. The fire protection door must absorb these bending forces. The bending must not be so great that this creates inadmissibly large gaps through which hot gases could escape. Very large forces occur.

The respective door leaf is held on the one hand by the door hinges and on the other hand only by the catch. It should be borne in mind that the fire protection doors must pass the fire test even when they are not locked, simply by holding the catch.

This is a technical challenge even with single-leaf doors. With multi-leaf doors, for example with passive leaf and active leaf, there are generally even greater problems. Here, the two fire protection door leaves are held on their hinge side by the door hinges. A passive leaf can still be held by vertical locking elements on the upper frame spar and / or on the floor; the usually very broad active leaf must then be supported on the counter bearing of the passive leaf only by the catch.

In order to create a safe fire protection structure, the high bending forces in the event of a fire can be absorbed, for example, by bolts, hooks or the like, which provide several support points for the fire protection door leaf. These are designed so that an initial deformation of the fire door (s) is possible to reduce the load on the frame and lock. With this initial deformation, however, there is a risk of gaps between the fire doors or between the fire door and The frame is created so that smoke and fire gases can escape from the fire compartment.

The object of the invention is to provide an improved fire door that better withstands the deformation forces occurring in the event of fire.

This object is achieved by a fire door wing according to the main claim. Preferred further developments of the fire protection door wing are the subject of the dependent claims. A multi-wing fire door with a fire door according to the present invention is the subject of the independent claim. According to a first aspect, the present invention provides a fire protection door wing for a fire protection door, the fire protection door wing having at least one jacket plate and a panel, wherein a hooking device arranged on the jacket plate always engages behind another door element of the fire protection door when the fire protection door is closed, the hooking device being off Metal-formed detection element for detecting the further door element, wherein the detection element is designed such that the detection element hooks with the further door element in the event of a fire and because of the hooking a tensile force acts such that the detection element is moved from a normal position to an extended position.

In the closed state, the fire protection door leaf engages behind another door element with the hooking device, such as in particular another fire protection door leaf. The detection element detects, for example, a projection or an opening of the further door element. In the event of a fire, when the fire protection door leaf begins to deform, the detection element hooks with the other door element. Due to the interlocking, a tensile force resulting from the bending forces acts on the detection element. When the tensile forces are increased, the detection element is pulled out of its normal position. Too great tensile stresses are avoided and a certain evasion of the fire door to the other door element is permitted. This allows materials such as fire frothers or cooling materials to expand inside the wing and fulfill their function.

Any gap areas that may arise are preferably covered by the detection element. This means that no fire gases can escape from the fire compartment between the fire protection door leaf and the other door element.

It is preferred that the hooking device is formed along the entire height of the fire protection door leaf.

The fire protection door leaf preferably comprises a metal reinforcement plate for holding the hooking device in the normal position.

The counteraction to the bending forces can be improved by the aforementioned measures. In particular, the metal reinforcement plate gives the hooking device greater stability and rigidity, so that tensile forces can be counteracted better. Improved behavior in the event of a fire and an improved sealing effect can thus be achieved.

It is preferred that the detection element has a detection section for engaging behind the further door element and a fastening section inserted into a guide device.

It is preferred that the guide device has a slot in which the fastening section is inserted, in particular in a non-positive manner.

It is preferred that the detection element is adapted to the guide device such that the detection element is also held in the guide device in the extended position.

It is preferred that the detection section and the fastening section run essentially orthogonally to one another.

It is preferred that the guide device has a hollow chamber profile formed by the jacket plate.

It is preferred that the guide device has a hollow chamber which is delimited by the hollow chamber profile and adjoins the slot.

The guide device enables a controlled movement of the detection element in the event of a fire.

The force-fit fastening in the guide device normally allows simple assembly, sufficiently secures the detection element against unintentional movement (for example if the fire protection door leaf falls into the lock) and still enables the required movement in the event of a fire.

The adaptation of the detection element can prevent the detection element from being released from the guide device. This is particularly relevant if the fire door wing deforms more than usual.

A rectangular shape of the detection element can achieve an optimal sealing effect with optimal interlocking.

If the guide device is formed by a jacket sheet, the fire protection door leaf can be manufactured with less effort.

The cavity delimited by the hollow chamber profile preferably serves not only to accommodate the detection element but also a certain freedom of movement of the detection element perpendicular to the plane of the fire door leaf. Tilting or jamming of the detection element when moving from the normal position into the extended position can thereby be prevented without impairing the sealing effect too much.

The fire protection door leaf preferably comprises a movement limiting device for limiting the movement of the detection element.

It is preferred that the movement limiting device has a first limiting section which is arranged on the detection element and adjoins its fastening section and has a second limiting section, in particular formed from the jacket plate.

It is preferred that the first delimiting section runs essentially orthogonally to the fastening section and essentially parallel to the detection section, in particular in the same direction as the detection section.

It is preferred that the movement limitation device is part of the guide device, the movement limitation device being arranged in particular adjacent to the hollow chamber profile.

The movement limiting device enables improved control over the movement of the detection element.

Advantageously, the movement limiting device, like the guide device, is an integral part of the jacket sheet, which reduces the manufacturing effort.

An extended position can also be defined by the movement limiting device, which position should not be exceeded by the detection element. The movement of the detection element can thus be stopped before the sealing effect begins to deteriorate too much.

According to a further aspect, the present invention provides a multi-leaf fire protection door which has a first fire protection door leaf which can be pivoted about a first vertical axis in accordance with one of the embodiments explained above and a second fire protection door leaf which can be pivoted about a second vertical axis and which has at least one jacket plate and a panel, wherein the two fire doors catch each other in the closed state, the hooking device engaging behind or hooking the at least one jacket plate of the second fire door in the closed state.

The multi-leaf fire protection door realizes the advantages of the fire protection door wing in whole or in part in a multi-leaf fire protection door. In the case of the multi-leaf fire protection door in particular, it is of considerable advantage to relieve bending forces in a controlled manner by preferably limited movement of a rear hook element and yet to ensure that the two leaves are securely hooked.

Fig. 1

eine schematische Ansicht einer Mehrflügel-Feuerschutztür mit einem Ausführungsbeispiel eines Feuerschutztürflügels;

Fig. 2

einen Schnitt entlang der Linie A-A aus Fig. 1;

Fig. 3

eine vergrößerte Ansicht des Kastenblechs des ersten Feuerschutztürflügels aus Fig. 2;

Fig. 4

eine vergrößerte Ansicht des Kastenblechs des zweiten Feuerschutztürflügels aus Fig. 2;

Fig. 5

ein weiteres Ausführungsbeispiel eines Feuerschutztürflügels;

Fig. 6

eine vergrößerte Ansicht des Kastenblechs des Feuerschutztürflügels aus Fig. 5;

Fig. 7

eine Kantfolge zum Herstellen des Kastenblechs aus Fig. 6;

Fig. 8

ein weiteres Ausführungsbeispiel eines Feuerschutztürflügels;

Fig. 9

eine vergrößerte Ansicht des Kastenblechs des Feuerschutztürflügels aus Fig. 8; und

Fig. 10

eine Kantfolge zum Herstellen des Kastenblechs aus Fig. 9.

Exemplary embodiments of the invention are explained in more detail below with reference to the drawings. It shows:

Fig. 1

a schematic view of a multi-wing fire door with an embodiment of a fire door wing;

Fig. 2

a section along the line AA Fig. 1 ;

Fig. 3

an enlarged view of the box plate of the first fire door Fig. 2 ;

Fig. 4

an enlarged view of the box plate of the second fire door Fig. 2 ;

Fig. 5

a further embodiment of a fire door wing;

Fig. 6

an enlarged view of the box plate of the fire door Fig. 5 ;

Fig. 7

an edge sequence for producing the box plate Fig. 6 ;

Fig. 8

a further embodiment of a fire door wing;

Fig. 9

an enlarged view of the box plate of the fire door Fig. 8 ; and

Fig. 10

an edge sequence for producing the box plate Fig. 9 .

According to Fig. 1 a multi-leaf fire protection door 10 includes a frame 11, a passive leaf 12 and an active leaf 13.

The passive leaf 12 is fastened to the frame 11 by means of door hinges 16 so as to be pivotable about a first vertical axis 14. The active leaf 13 is fastened to the frame 11 by means of door hinges 16 so as to be pivotable about a second vertical axis 15. In the closed state, the passive leaf 12 and the active leaf 13 engage one another at a central joint area 17.

The multi-wing fire protection door 10 may further include a threshold 18. The passive leaf 12 can be provided with a locking bolt 19 which locks the passive leaf 12 on the frame 11 at the top and the door sill 18 at the bottom.

The passive leaf 12 has a first fire protection door leaf 100. The active leaf has a second fire protection door leaf 200. The first fire protection door leaf 100 and the second fire protection door leaf 200 are described below with reference to FIG Figures 1 to 4 explained.

The first fire protection door leaf 100 has a first casing 101 made of sheet metal, in particular sheet steel, with a filling 102 located therein.

A first broad side 110 and a second broad side 112 are formed on the first jacket 101. The first jacket 101 comprises a first cover plate 103 and a first box plate 104. The first broad side 110 is also called the counter hinge side 120, whereas the second broad side 112 is also called the hinge side 130. The first box plate 104 has the counter hinge side 120, a first hinge-side end 105 and a first lock-side end 106. The first cover plate 103 has the hinge side 130.

A first metal reinforcement plate 107 can be provided to reinforce the first lock-side end face 106. The first metal reinforcing plate 107 can simultaneously serve as a counter bearing plate 108 for a locking element of a door lock, such as a catch 209.

The first box plate 104 is bent on the counterband side 120 to form a projection 121 on the counterband side. The counter-band-side projection 121 is preferably formed from a double layer of the first box plate 104. The counter-band-side projection 121 runs at an angle to the counter-band side 120 in the direction of the band side 130. The counter-band-side projection 121 can also run essentially parallel to the first lock-side end face 106.

Furthermore, the first box plate 104 runs in the direction of the first hinge-side end face 105, so that a double layer is preferably formed. The first box plate 104 is then bent back and runs at a distance from the double layer. A hollow chamber profile 124 is thereby formed. The hollow chamber profile 124 is essentially U-shaped and opened towards the first lock-side end face 106.

The first box plate 104 then runs from the counter-hinge side 120 to the hinge side 130 and thus forms the first lock-side end face 106. A hinge-side recess 131 borders the first lock-side end face 106.

The recess 131 on the hinge side is designed as a first groove profile 132. The first groove profile 132 is preferably essentially U-shaped.

The first groove profile 132 comprises a first projection 133, which forms a first groove flank 134 and projects substantially parallel to the first lock-side end face 106 in the direction of the hinge side 130, a first groove base 135 which runs essentially parallel to the first broad side 110 , and a first bend 136, on which the first cover plate 103 and the first box plate 104 are hooked together.

A guide device 150 is provided on the counterband side 120. The guide device 150 comprises a slot 151 and an adjoining hollow chamber 152. The hollow chamber 152 is delimited by the hollow chamber profile 124.

A hooking device 140 is provided on the counterband side 120. The hooking device 140 comprises a detection element 141. The detection element 141 has a detection section 142 and a fastening section 143. The fastening section 143 is inserted into the hollow chamber 152 through the slot 151. The detection element 141 is arranged such that it can engage in a recess, a recess or the like of another fire protection door leaf.

Furthermore, the first fire protection door leaf 100 comprises a movement limiting device 160, which limits the movement of the detection element 141. The movement limiting device 160 has a first limiting section 161 and a second Limiting section 162. In the case of the first fire protection door leaf 100, the first limiting section 161 is arranged on the detection section 142. The second limiting section 162 is arranged on the counter-band-side projection 121.

The second fire door wing 200 is constructed similarly to the first fire door wing 100. The second fire protection door leaf 200 has a second casing 201 made of sheet metal, in particular sheet steel, and a filling 202 located therein.

The second jacket 201 also has the first broad side 110 and the second broad side 112. The second casing 201 comprises a second cover plate 203 and a second box plate 204. The second box plate 204 has the counter-band side 120, a second band-side end face 205 and a second lock-side end side 206. The second cover plate 203 has the hinge side 130.

The second box plate 204 comprises a second hinge-side end 205 and a second lock-side end 206. The second lap-side end 206 can be provided with a second metal reinforcing plate 207. The second fire protection door leaf 200 comprises a standard lock 208 which has a catch 209. The catch 209 supports the second fire protection door leaf 200, for example on the counter bearing plate 108 of the first fire protection door leaf 100.

The second fire protection door leaf 200 comprises a recess 220 on the opposite hinge side. The recess 220 on the opposite hinge side is preferably designed as an essentially U-shaped second groove profile 221.

The second groove profile 221 has a second groove flank 222 formed from the second box plate 204, which preferably extends at an angle of 45 ° to the counterband side 120. Adjacent to the second groove flank 222 is a second groove base 223, which runs essentially parallel to the counterband side 120. Subsequently, a second projection 224 is formed, which projects essentially parallel to the second front side 206 on the lock side in the direction of the counterband side 120. The second lock-side end face 206 runs in the Essentially perpendicular to the broad sides 110, 112 from the opposite hinge side 120 to the hinge side 130.

The second fire protection door leaf 200 further comprises a hinge-side groove profile 231. The hinge-side groove profile 231 is preferably essentially U-shaped, the opening facing the counter-hinge side 120.

The hinge-side groove profile 231 comprises a hinge-side groove flank 232, a hinge-side groove base 233 and a hinge-side bend 234.

A section of the second box plate 204 forms the band-side groove flank 232, which merges into the band-side groove bottom 233 and finally forms the band-side bend 234. The band-side groove base 233 extends essentially parallel to the band side 130. The band-side bend 234 forms a projection projecting from the band side 130 onto the counter-band side 120.

The second groove profile 221 and the hinge-side groove profile 231 are examples of further door elements that can hook with the hooking device 140.

How best to look Fig. 2 recognizable, the detection element 141 engages in the closed state of the multi-wing fire door 10 in the second groove profile 221. If the two fire protection door leaves 100, 200 begin to deform in the event of a fire, the detection section 142 and the second projection 224 can get caught. This creates a tensile force F, which is directed away from the first end face 106 on the lock side and onto the second end face 205 on the hinge side and acts on the detection element 141. The detection element 141 is thus moved essentially parallel to the first broad side 110, more precisely the counterband side 120. The bending forces acting on the fire protection door leaves 100, 200 can be reduced by this controlled movement.

The movement limiting device 160 prevents the detection element 141 from detaching from the first fire protection door leaf 100. The detection element 141 can move within a range of motion 122, as specified by the motion limiting device 160. If the detection element 141 is pulled out far enough by the tensile force F, the first delimiting section 161 abuts the second delimiting section 162. The side of the first projection 121 which faces the first end face 106 on the lock side therefore forms a stop section 123 for the detection element 141. The bending forces then become, for example derived via the first projection 121 and the counterband side 120.

Should a gap arise between the first lock-side face 106 and the second lock-side face 205, the gap area can be covered by the detection element 141 moved into an extended position, so that smoke and fire gases can pass through the multi-leaf fire protection door 10 .

Based on Figures 5 and 6 Another exemplary embodiment of a first fire protection door leaf 300 is explained.

The first fire protection door leaf 300 comprises a first casing 301 made of sheet metal, in particular sheet steel, and a filling 302 located therein. A first broad side 310 and a second broad side 312 are formed on the first casing 301. The first casing 301 comprises a first cover plate 303 and a first box plate 304. The first broad side 310 is also called the counter hinge side 320, whereas the second broad side 312 is also called the hinge side 330. The first box plate 304 has the hinge side 330 and a first end face 306 on the lock side.

The first cover plate 303 has the counterband side 320.

As in the previous exemplary embodiment, a first metal reinforcing plate 307 can be arranged on the first end face 306 on the lock side. The first metal reinforcement plate 307 can also act as a counter bearing plate 308. The first box plate 304 first forms a bend 321 together with the first cover plate 303. From the bend 321, the first box plate 304 runs in a double position with the first cover plate 303. The first box plate 304 continues in the thickness direction towards the hinge side 330 and runs in the Further parallel to the counter hinge side 320, so that a hollow chamber profile 324 is formed.

The first box plate 304 is bent at an edge 325 in the direction of the hinge side 330 and forms the first end face 306 on the lock side.

The first box plate 304 has on the hinge side 330 a hinge-side recess 331. The first hinge-side recess 331 is preferably designed as a groove profile 332. The groove profile 332 has a projection 333, a groove flank 334 and a groove bottom 335. The projection 333 extends at an angle to the hinge side 330 from the first hinge side 330 in the direction of the first lock-side end side 306.

The first box plate 304 comprises a seal receptacle 337 formed by the first hinge-side recess 331. A seal 338 can be received in the seal receptacle 337.

A hooking device 340 is provided on the counterband side 320. The hooking device 340 comprises a detection element 341, which has a detection section 342 and a fastening section 343. The detection section 341 is formed as a projection 326, which projects in a region near the edge 325 in the direction of the counterband side 320. As in the previous exemplary embodiment, the detection section 342 can detect another door element, such as another projection, a recess, a groove profile or the like.

The fastening section 343 is inserted into a guide device 350. The guide device 350 comprises a slot 351 formed between the first counter-band-side bend 321 and an opposite section of the box plate 304. The guide device 350 further comprises a hollow chamber 352 adjoining the slot 351 which is delimited by the hollow chamber profile 324.

A movement limitation device 360 is also provided. The movement limiting device 360 comprises a first limiting section 361, which adjoins the fastening section 343 and in the thickness direction thereof Counter-hinge side 320 runs. The movement limiting device 360 further comprises a second limiting section 362, which is formed by the bend 321. The first cover plate 303 forms a stop section 323 accommodated in the hollow chamber 352. A movement range 322 is defined by the hollow chamber 352 and the stop section 323. The detection element 341 can therefore only move within the movement range 322.

In the event of a fire, when a tensile force F acts on the detection element 341, the projection 326 moves in the direction of the tensile force F. The entire detection element 341 is thus moved along the movement range 322 to an extended position. The first metal reinforcement plate 307 ensures a certain stiffness of the lock-side end face 306, so that the deflection of the detection element 341 is smaller compared to the previous exemplary embodiment with the same tensile force F.

A gap area that may occur between the first fire protection door leaf 300 and the further door element can therefore be better contracted and its width reduced.

Based on Fig. 7 A manufacturing method for the first box plate 304 will now be explained.

A first hollow profile section 600 is bent from a sheet, in particular steel sheet, in one step. The first hollow profile section 600 is bent at an angle of approximately 90 ° in a first direction D1.

In a further step, a second hollow profile section 601 is bent, which runs essentially perpendicular to the first hollow profile section 600 and is also bent in the first direction D1. The second hollow profile section 601 is longer than the first hollow profile section 600.

In a further step, a third hollow profile section 602 is formed. The third hollow profile section 602 is also bent in the first direction D1, however only by 70 °. The third hollow profile section 602 is as the first hollow profile section 601.

In a further step, an edge section 603 on the counterband side is bent. The counterband-side edge section 603 is bent in a second direction D2, which is opposite to the first direction D1.

In a further step, the third hollow profile section 602 is bent further in the first direction D1, so that it runs essentially perpendicular to the edge section 603 on the counterband side. The first, second and third hollow profile section 600, 601, 603 thereby form the hollow chamber profile 324.

In a further step, a lock-side end section 604 is formed. The lock-side end section 604 is formed by bending in the first direction D1 by approximately 90 °. The lock-side end section 604 forms the first lock-side end face 306 of the first fire protection door leaf 300.

In a further step, a double-layer section 605 on the strip side is formed, in which the sheet is bent back onto itself in the second direction D2. The first band-side recess 331 is later formed from the band-side double-layer section 605.

The first box plate 304 produced in this way can be hooked onto the first cover plate 303. The first casing 301 thus formed is then filled with the filling 302. The hooking device 340 can then be arranged on the first end face 306 on the lock side and mounted, for example, by insertion or screwing.

Based on Figures 8 and 9 Another embodiment of a first fire door 500 is explained.

The first fire protection door leaf 500 comprises a first casing 501 made of sheet metal, in particular sheet steel, and a filling 502 located therein. A first broad side 510 and a second broad side 512 are formed on the first casing 501.

The first jacket 501 comprises a first cover plate 503 and a first box plate 504. The first broad side 510 is also called the counter hinge side 520, whereas the second broad side 512 is also called the hinge side 530. The first box plate 504 has the counter hinge side 520 and a first end face 506 on the lock side. The first cover plate 503 has the hinge side 530.

As in the previous exemplary embodiments, the first lock-side end face 506 can comprise a first metal reinforcing plate 507. The first metal reinforcement plate 507 can act as a counter bearing plate 508.

The first cover plate 503 and the first box plate 504 are hooked on a bend 521 on the first counterband side 520. The first box plate 504 runs adjacent to the bend 521 substantially parallel to the counter-band side 520 in the direction of the band-side end side (to the left in FIG Fig. 8 ) of the fire protection door leaf 500. The first box plate 504 is further bent back on itself, so that a hollow chamber profile 524 is formed. The hollow chamber profile 524 has a substantially U-shape. The first box plate 504 extends further to an edge 525 at which the first box plate 504 is bent in the direction of the hinge side 530 to form the first lock-side end face 506.

The first box plate 504 comprises a seal receptacle 537 formed by the first hinge-side recess 531. A seal 338 can be received in the seal receptacle 537.

Furthermore, a hooking device 540 is provided on the first counterband side 520. The hooking device 540 comprises a detection element 541, which has a detection section 542 for detecting a further door element and a fastening section 543. The detection section 541 is formed as a projection 526, which projects in a region near the edge 525 in the direction of the counter-band side 520. As in the previous embodiment, the detection section 541 can detect another door element, such as another projection, a recess, a groove profile or the like.

The fastening section 543 is inserted into the hollow chamber profile 524. The hollow chamber profile 524 thereby forms a guide device 550, which comprises a slot 551 and a hollow chamber 552. The slot 551 is formed by the bend 521 and the opposite portion of the first box plate 504. The hollow chamber 552 extends adjacent to the slot 551 and away from the slot 551 parallel to the broad sides 510, 512 in the direction of the band-side end face.

In contrast to the previous exemplary embodiments, the first fire protection door leaf 500 has no movement limiting device. Instead, the detection element 541 is designed such that the fastening section 543 is still in the guide device 550 even when the detection element 541 is extended. The guide device 550 thus defines a movement area 522 in which the detection element 541 can move.

In the event of a fire, the detection element can be moved from its normal position into an extended position by a tensile force F. The first metal reinforcing plate 507 acts on the detection element 541 with a larger, repelling force Fig. 10 a manufacturing method for the first box plate 504 specified.

A metal sheet is bent to a counter-band-side bending section 612 in one step. The bend is in a first direction D1.

In a further step, the bending portion on the counterband side is bent by approximately 90 ° in a second direction D2, which is opposite to the first direction D1. As a result, the first bend 521 on the counterband side is partially formed.

In a further step, the sheet is bent by approximately 110 ° in the first direction D1 and a first hollow profile section 610 and a second hollow profile section 611 are thus formed.

In a further step, an edge section 603 on the counterband side is bent in the second direction D2, and thus the first edge 525 on the counterband side is formed.

In a further step, the first hollow profile section 610 is bent further, so that it runs parallel at a distance from the second hollow profile section 611. This forms the hollow chamber profile 524, which later serves as a guide device 550.

In a further step, a front end section 614 on the lock side is bent in the first direction D1, so that it extends essentially perpendicularly to the still unprocessed section of the metal sheet.

In a further step, by bending the sheet back, a strip-side double-layer section 615 is formed, which serves to form the first strip-side recess 531. The lock-side end section 614 then forms the first lock-side end face 506.

According to the present invention, fire protection door leaves have been specified which experience a certain deformation in the event of a fire and keep the gaps which are closed thereby, so that the passage of fire and hot gases through the fire protection door leaf and the fire protection door formed therewith can be prevented. In addition, simple manufacturing processes for box sheets for such fire protection door leaves were shown.

Reference list

10th

Multi-wing fire door

11

frame

12th

Inactive leaf

13

Active leaf

14

first vertical axis

15

second vertical axis

16

Hinge

17th

Middle joint area

18th

Threshold

19th

Latch bolt

100

first fire door

101

first coat

102

filling

103

first cover plate

104

first box plate

105

first end face on hinge side

106

first front side on the lock side

107

first metal reinforcement plate

108

Counter bearing plate

110

first broadside

112

second broadside

120

Opposite hinge side

121

projection on the opposite side

122

Range of motion

123

Stop section

124

Hollow chamber profile

130

Hinge side

131

band-side return

132

first groove profile

133

first lead

134

first groove flank

135

first groove base

136

first turn

140

Hooking device

141

Detection element

142

Acquisition section

143

Fastening section

150

Management facility

151

slot

152

Hollow chamber

160

Movement limitation device

161

first boundary section

162

second boundary section

200

second fire door

201

second coat

202

filling

203

second cover plate

204

second box plate

205

second hinge-side end

206

second front side on the lock side

207

second metal reinforcement plate

208

Standard lock

209

Snap

220

return on the opposite side

221

second groove profile

222

second groove flank

223

second groove base

224

second lead

231

hinge-side groove profile

232

groove flank on the hinge side

233

groove base on hinge side

234

bending on the hinge side

300

first fire door

301

first coat

302

filling

303

first cover plate

304

first box plate

306

first front side on the lock side

307

first metal reinforcement plate

308

Counter bearing plate

310

first broadside

312

second broadside

320

Opposite hinge side

321

Bend

322

Range of motion

323

Stop section

324

Hollow chamber profile

325

Edge

326

head Start

330

Hinge side

331

band-side return

332

Groove profile

333

head Start

334

Flank

335

Groove base

337

Seal holder

338

poetry

340

Hooking device

341

Detection element

342

Acquisition section

343

Fastening section

350

Management facility

351

slot

352

Hollow chamber

360

Movement limitation device

361

first boundary section

362

second boundary section

500

first fire door

501

first coat

502

filling

503

first cover plate

504

first box plate

506

first front side on the lock side

507

first metal reinforcement plate

508

Counter bearing plate

510

first broadside

512

second broadside

520

Opposite hinge side

521

Bend

522

Range of motion

524

Hollow chamber profile

525

Edge

526

head Start

530

Hinge side

531

band-side return

537

Seal holder

538

poetry

540

Hooking device

541

Detection element

542

Acquisition section

543

Fastening section

550

Management facility

551

slot

552

Hollow chamber

600

first hollow section

601

second hollow section

602

third hollow section

603

edge section on the opposite side

604

front side section on the lock side

605

band-side double-layer section

610

first hollow section

611

second hollow section

612

counter-band-side bending section

613

edge section on the opposite side

614

front side section on the lock side

615

band-side double-layer section

D1

first direction

D2

second direction

F

traction

Claims (10)

1. Fire door leaf (100, 200, 300, 500) for a fire door (10), wherein the fire door leaf (100, 200, 300, 500) comprises at least one casing sheet (101, 201, 301, 501) and a filling (102), wherein a hooking device (140, 340, 540) arranged on the casing sheet (101, 201, 301, 501) always engages behind a further door element of the fire door (10) in the closed state of the fire door (10), wherein said hooking device (140, 340, 540) is a grasping element (141, 341, 541) formed of metal for grasping said further door element, wherein said grasping element (141, 341, 541) is designed in such a way that the grasping element (141, 341, 541) hooks onto the further door element in the event of fire, characterized in that on account of said hooking action a tensile force (F) acts in such way that the grasping element (141, 341, 541) is moved from a normal position into an extended position.
2. Fire door leaf (100, 200, 300, 500) according to claim 1, characterized in that the grasping element (141, 341, 541) has a grasping portion (142, 342, 542) for engaging behind the further door element and a fixing portion (143, 343, 543) inserted into a guide device (150, 350, 550).
3. Fire door leaf (100, 200, 300, 500) according to claim 2, characterized in that the guide device (150, 350, 550) has a slot (151, 351, 551) in which the fixing portion (143, 343, 543) is inserted, in particular in a non-positive manner.
4. Fire door leaf (100, 200, 300, 500) according to claim 2 or 3, characterized in that the grasping element (141, 341, 541) is adapted to the guide device (150, 350, 550) in such a way that the grasping element (141, 341, 541) is held in the guide device (150, 350, 550) also in the extended position.
5. Fire door leaf (100, 200, 300, 500) according to any one of claims 2 to 4, characterized in that the grasping portion (142, 342, 542) and the fixing portion (143, 343, 543) are substantially orthogonal to each other.
6. Fire door leaf (100, 200, 300, 500) according to any one of claims 1 to 5, characterized by a movement limiting device (160, 360) for limiting the movement of the grasping element (141, 341).
7. Fire door leaf (100, 200, 300, 500) according to claim 6, characterized in that the movement limiting device (160, 360) comprises a first limiting section (161, 361) arranged on the grasping element (141, 341) and adjoining the fixing portion (143, 343) thereof and a second limiting section (162, 362) formed in particular from the casing sheet (101, 301).
8. Fire door leaf (100, 200, 300, 500) according to claim 7, characterized in that the first limiting section (161, 361) extends substantially orthogonally to the fixing portion (143, 343) and substantially parallel to the grasping portion (142, 342), in particular in the same direction as the grasping portion (142, 342).
9. Fire door leaf (100, 200, 300, 500) according to any one of claims 1 to 8, characterized in that the hooking device (140, 340, 540) is formed along its entire height.
10. Multi-leaf fire door (10), characterized by a first fire door leaf (100, 300, 500) pivotable about a first vertical axis (14) according to one of claims 1 to 9 and a second fire door leaf (200) pivotable about a second vertical axis (15), which second fire door leaf (200) has at least one casing sheet (201) and a filling (102), wherein the two fire door leaves (100, 200, 300, 500) grasp one another in the closed state, wherein the hooking device (140, 340, 540) engages or is hooked behind the at least one casing sheet (201) of the second fire door leaf (200) in the closed state.

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