ES2623499T3 - Multi-leaf fire door and fire door leaf for it - Google Patents

Abstract

Multi-leaf fire door (10, 110), with a first fire door leaf (14, 114), to be rotated around a first vertical axis, and with a second fire door leaf (18, 118), which is to be rotated around a second vertical axis, so that, when the fire door (10, 110) is closed, the fire door leaves (14, 18; 114, 118) collect each other, where the leaves ( 14, 18; 114, 118) of fire door are constructed by means of wrap plates (26, 30; 126, 130) with a filling (34, 134) inside them, characterized in that, at least one wrap plate ( 26, 126) of the first fire door leaf (14, 114) and a wrap sheet (30, 130) of the second fire door leaf (18, 118) are configured such that, in the closed position, they grab each other's back or hook each other.

Description

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DESCRIPTION

Multi-leaf fire door and fire door leaf for it

The invention relates to a multi-leaf fire door, with fire door leaves that are formed by wrap plates with a padding therein.

From DE 196 49 443 B4 a multi-leaf fire door of this type is known. This document refers to a fire door with a first door leaf and a second door leaf, the door leaves presenting as cover plates a cover plate and a box plate. A step sheet is provided with a lock with a blow latch, which can be locked in a counter support on the fixed leaf. The front faces with lock or counter support are referred to below - as opposed to the front faces on the side of the bolts - front faces on the side of the lock. Both door leaves of document DE 196 49 443 B4 have, on these front faces of the lock side, a profiled U-shaped configuration and, on the opposite wide face, a stepped recess. With the door closed, the U-shaped profiled configuration is housed in the stepped recess of the, in each case, another door leaf. The, in each case, another door leaf presents in its stepped recess a sealing gasket that is supported on the metal sheet, the sealing gasket being composed of a material that in case of fire foams and serving the gasket for fill the gap between the two fire door leaves in case of fire. These gaskets are manifestly glued on the metal sheets and serve only for sealing purposes.

From document DE 41 36 155 A1 a sliding door with a door leaf and a fence is known. The sliding door is for example part of fire doors configured as sliding gates and serves as an escape door.

US 4 937 978 A describes a metal door structure, which has two metal panels. The panels form folded sections, which extend parallel and can be touched in a joint area. The metal door structure is used in fire doors.

Document DE 20 2011 004 674 U1 shows a fire door with at least one door leaf and a fence. A recess comprising interlocking elements is arranged on the side fire door. The interlocking elements can partially fit in geometric connection in recesses, for example the fence.

From US 2 912 725 A an insulating panel is known whose purpose is to prevent heat exchange.

From EP 2 395 192 a multi-leaf fire door is known according to the preamble of claim 1.

The structures of the fire doors must be approved by the technical inspection of constructions. To this end, manufacturers of fire doors with a respectively new structure must carry out standardized fire resistance tests, which test the fire protection properties. To this end, the fire doors are mounted with fence and door leaf in a test wall and installed in a test oven, to subject them from the side to the action of heat during the prescribed protection time. For example, a fire door of class T30 must withstand at least 30 minutes. If flames come out during the fire behavior test, or if the fire door is inadmissibly heated on the opposite side of the fire, then it has not passed the fire resistance test. No approval is given until it has been proven that the fire behavior test has been passed.

In the fire doors whose door leaves are constructed with wrap plates with a filling inside them, the so-called "bimetallic effect" is presented in such tests of fire behavior. The wrap sheet that faces the fire expands, due to the greater heat, more than the sheet that looks in the opposite direction to the fire. Because of the difference in thermal expansion, the entire leaf of the door leaf is subjected to considerable tension and consequently sags. The fire door must withstand these bending forces. The warping should not become so large that as a result there are inadmissibly large grooves through which hot gases can escape. In this context there are very large forces.

The respective door leaf is fastened here on the one hand by the door bolts and on the other hand only by the blow latches. In this context, it must be borne in mind that the fire doors must pass the fire behavior test also in a non-locked state, only with the fastening of the blow latches.

Already at the doors of a leaf, this is not trivial. In the doors of several leaves, for example with a fixed leaf and a leaf of step, major problems appear. Here, the two blades of the fire door are attached

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only on its sides of the bolts, for the latter. A fixed sheet may also be held by vertical closure elements on the upper fence of the fence and / or on the ground; The step sheet, which in the majority of the cases is configured with a large width, must then rest on the back support of the fixed leaf only by means of the blow latches.

To create a secure firewall structure, an expensive lock structure with several strike latches was necessary, due to the great flexion forces in case of fire, so that there were several points of support for the passage sheet.

The aim of the invention is to create a multi-leaf fire door that can be equipped with a standard door lock.

This objective is achieved by means of a fire door according to claim 1. The dependent claims are directed to advantageous configurations of the invention.

The object of the accessory claim is an advantageous fire door leaf for a fire door of this type.

The invention features a multi-leaf fire door with a first fire door leaf, which has to be rotated around a first vertical axis, and with a second fire door leaf, which must be rotated around a second vertical axis, so that, when the fire door is closed, the fire door leaves collect each other with their areas of the front side of the lock side that are to be disposed away from the vertical axes, the fire door leaves being presented in each case about Metal sheet door hinges that are constructed by wrapping sheets with a padding therein, characterized in that at least one wrapping sheet of the first fire door leaf and a wrapping sheet of the second fire door leaf sheet they are configured in such a way that, in the closed position, they are held behind each other or hooked on each other.

It is preferred that the envelope plate (s) of the first fire door leaf and the envelope plate (s) of the second fire door sheet have complementary metal step configurations between each other for engagement behind the fire door leaves in the closed position of the fire door.

The configurations of metal steps can be formed, for example, by flanks of grooved recesses or flange-like projections.

It is preferred that the door leaves have metal profiles that, when the door is closed, are held behind each other along the entire height, or at least a large part of the height, of the front face of the side of the lock.

It is preferred that one of the fire door leaves present in a wide face, in its wrap sheet forming this wide face, in the area near the edge with respect to the area of the front face of the lock side, an inlet in the form of a groove that extends inwards in the thickness direction and that the other fire door leaf has a projection that protrudes inwards in the thickness direction, to intervene in the recess.

It is preferred that, in the closed position, the fire door leaves are held behind in the two transition zones between the front side of the lock side and the first and second wide faces of the respective fire door leaf, of so that on both wide faces a grip forms behind.

It is preferred that one of the fire door leaves present on one of the wide faces the inlet and the other fire door leaf correspondingly on this wide face correspondingly the projection and that, on the other wide face, one of the fire door leaves present the protrusion and the other fire door leaf present the incoming.

It is preferred that at least one back hitch structure is formed by several layers of the folded wrap plates and / or at least one layer of the wrap sheet and at least one metal reinforcement plate.

It is preferred that the metal reinforcement plate (s) are formed by a lock plate and / or a back support plate that serves as a back support for a lock.

It is preferred that the fire door blades are grasped behind or hooked on one another continuously only on one side.

Surprisingly, a one-sided grip behind, in only one of the wide faces, has proved sufficient to achieve a secure grip behind even in case of fire.

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The configuration of a grip behind only one side allows to substantially simplify production and save more material in relation to doors with grips behind on both sides. Adaptation is also easier and tolerances can be maintained large, at greater intervals.

It is preferred that the wrap plates be held behind each other or hooked on each other only in the area of one of the two wide faces of the fire door.

The one-sided back grip serves for mutual support of the door leaves and creates, in addition to the blow latch, additional support points for the door leaves. In this way it is possible to use a standard lock instead of a special lock. Additionally, the use of only one grip behind requires fewer manufacturing steps to produce the door leaves, since at least one projection can be dispensed with. At the same time, less material is also consumed in production. The production of such a fire door is simpler and cheaper than that of known fire doors.

In case of fire, a wide face of the fire door expands and the filling material swells. This results in huge forces leading to a grip on the back, which prevents cracks in the fire door and effectively blocks the wide face in relation to the other face, especially when the fire door is not locked.

It is preferred that the sheeting plates are grasped behind or hooked only on the face of pernio.

In this arrangement of the grip behind, the mutual support of the door leaves is improved even in the event of a fire on the side opposite the pernio. In this case, the wide side of the side opposite the pernio dilates strongly, which causes a force to act on the fire door that pushes it towards the side of the pernio (that is, in the direction of opening). With this, the grip behind the side of the bolt is subjected to traction and hooks the fire doors firmly in relation to each other. This effectively prevents a formation of grooves and therefore the exit of hot fire gases, even when the fire door is not locked and is held only by a single blow latch.

It is preferred that, in the closed position, the fire door leaves are held behind in a transition zone between the front side of the lock side and the first and second wide faces of the respective fire door leaf, so that on a wide face a grip forms behind.

The main weakness of the conventional multi-leaf fire doors is the central junction zone, in which the two door leaves collect each other. By providing a grip on the back in this central joint area, an improved behavior can be achieved in the event of fire, since the greatest forces act here due to the lever action of the door leaves. In this case, the grip behind can effectively withstand these forces and prevent crevices from forming in the central joint area, even when the fire door is not locked and is held only by the slamming latch.

It is preferred that the grip behind in the closed position extend along the entire length of the fire door blades in a direction parallel to the vertical axes.

Compared to the multi-leaf fire doors in which the door leaves support each other at several points of support, a continuous grip behind significantly improves the behavior of the fire door, since the forces that occur in case of fire they spread throughout the fire door and do not act promptly.

It is preferred that in a zone of the wide face of the side of the pernio the grip is formed behind and that, in an area of the wide face of the side opposite to the pernio, one of the fire door leaves has a step and the other sheet of door firewall present a projection that intervenes in the step.

In the event of a fire on the opposite side of the pernio, the fire door is pushed by the "bimetallic effect" towards the side of the pernio (ie in the direction of opening). The projection on the opposite side of the pernio is then supported by the step on the opposite side of the pernio and is subjected to pressure. With this, the projection clogs the wide face from the other side of the fire door and prevents the release of fire gases from the other side.

It is preferred that the projection located on the wide side of the side opposite to the pernio of one of the fire door leaves has a sealing groove, and the step located on the wide face of the opposite side of the other fire door leaf present a sealing contact surface.

In the normal state (ie in a case without fire) it is desirable that a fire door has good sealing properties similar to those of a current door. For this purpose, an elastic sealing gasket (in most cases of rubber) is placed on the fire door. In case of fire, the board of

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Watertightness can prevent the release of fire gases, in the case of a fire on the side of the pernio on a lasting basis and in the case of a fire on the side opposite to the pernio at least initially.

In addition, the invention creates a fire door leaf for such a fire door, whose fire door leaf has a first wrap plate to form a first wide face, and a second wrap plate to form a second wide face, presenting one of the wrap plates, in the area near an edge, in the transition to a front face of the lock side, a groove configuration that is introduced in the thickness direction and which extends substantially parallel to the face front of the side of the lock, for the accommodation in geometric connection of a configuration of projection of another sheet of fire door, and the other wrapping sheet being shaped so that it protrudes inwards in the direction of the thickness at the edge, in the transition to the front side of the lock side, to form a projection intended to intervene in geometric connection in an inlet of the other fire door leaf.

Preferably, a hitch structure is provided along the entire central joint area.

To this end, the wrap plates are preferably provided with complementary protrusion-inlet configurations, so that, when the door is closed, a wrap plate of one of the door leaves grips a geometrically bonded sheet behind The other door leaf. In a preferred configuration of the invention, for example a marginal recess of metal sheet formed by a profiled metal configuration in the form of a U-profile does not grab behind for example only a glued seal, but instead grabs a profiled configuration in the form of slot, in particular a slot-shaped recess, formed in the metal of the other door leaf and provided with metal flanks.

Preferably, a rear-end hitch configuration is provided, so that in the area of the two wide faces of the fire door, a grip behind the metal sheet or a metal plate hitch is provided in each case.

For example, each fire door leaf may have several marginal U-shaped configurations in at least one of its wrap plates, such that the U profiles of one of the sheets and the U profiles of the other sheet They are open towards each other, so that they fit into each other when the door is closed.

To create a firm resistance, in a preferred configuration the hitch configurations behind are reinforced either by multiple layers of the respective metal plates or by additional metal inserts. For example, a metal plate can be provided that extends in the thickness direction and forms a groove flank. As a metal plate, for example, as a reinforcement plate, a lock plate or a reinforcement plate for the lock or a counter-support plate can be used, which serves as a counter-support for collecting fasteners and bolt-strike elements of the lock in the, in each case, another door leaf.

In another advantageous configuration, the fire door leaf is characterized in that, on the wide side of the side of the pernio, it has a projection that protrudes in the direction of the thickness towards the wide face of the side opposite to the pernio, to intervene in a recess of another fire door leaf, and, on the wide side of the side opposite the pernio, has a step that is introduced in the thickness direction towards the wide face of the pernio side, to accommodate a projection of another fire door leaf.

A fire door leaf of this type is suitable for a fire door indicated above and is easier and cheaper to produce than the known fire door leaves, since this configuration comprises only one projection.

In the fire door according to the invention, the wrap plates of the first and second fire door sheets are held behind and / or locked in the closed position. In addition to the fastening by means of the blow latch, in this way the wrap plates of the two fire door leafs that are hooked behind or grabbed behind can support bends in case of fire. Thanks to metal support, it is also possible to withstand considerable forces; it is not necessary to provide several blow latches.

Next, some examples of embodiment of the invention are explained in more detail by means of the attached drawings. Shows:

Figure 1, a front view of a multi-leaf fire door according to a first embodiment with a first fire door leaf and a second fire door leaf and a fence; Figure 2, a horizontal section through the fire door according to a first embodiment, along the line A-A of Figure 1;

Figure 3, an enlarged representation of detail X of Figure 2;

Figure 4, a vertical section through the fire door according to a first embodiment, along the line B-B of Figure 1;

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Figure 5, a front view of a multi-leaf fire door according to a second embodiment with a first fire door leaf and a second fire door leaf and a fence; Figure 6, a horizontal section through the fire door according to a second embodiment, along the line A-A of Figure 5; Figure 7, an enlarged representation of detail X of Figure 6;

Figure 8, a vertical section through the fire door according to a second embodiment, along the line B-B of Figure 5.

A multi-leaf fire door 10 is shown in Figure 1 according to a first embodiment, with a fence 12 and a first fire door leaf 14, in the form of a fixed leaf 16, and a second fire door leaf 18, in the form of a step sheet 20.

The fire door leaves 14, 18 are articulated in the fence 12 rotatably around a vertical axis by means of door bolts 22 and, in the closed position of the fire door 10, collect each other in a central joint area 24 .

As can be seen in Figure 2, the fire door leaves 14, 18 are formed in each case by a first wrap plate 26, in the form of a box plate 28, and a second wrap plate 30, in the form of a cover plate 32, and by an insulating pad 34 in the interior space of the door leaf formed by the box plate 28 and the cover plate 32.

In the central joint area 24, which is represented in Figure 2 and, enlarged, in Figure 3, the passage sheet 20 is provided with a standard lock 36 with a strike latch 42 and a bolt (not shown). The fixed blade 16 is provided with a counter support plate 38 with housing openings 40 for the strike latch 42 and the bolt.

The respective box plate 28 forms a first wide face 44 of the fire door 10 and of the respective fire door leaf 14, 18; and the cover plate 32 forms a second wide face 46 of the fire door 10 or of the respective fire door leaf 14, 18.

The vertical front faces in whose area the door bolts 22 are placed are called front faces 48 of the pernio side, while the front faces located in the central joint area 24, where the standard lock 36 and the counter support plate are housed 38, are called front faces 50 on the side of the lock.

As can be seen from Figure 3, in the area of the first edge 52, which is in the transition between the first wide face 44 and the front face 50 of the lock side of the passage leaf 20, the box plate 28 of the passage sheet 20 is bent obliquely inwards, starting from a large surface that forms the first wide face 44, to form a first groove flank area 54, then is driven parallel to the first wide face 44, to form a groove bottom area 56, then bent outward in the thickness direction from its inner travel and again bent completely backwards, to form a shoulder 58 in the form of a flange 60 extending in the thickness direction and which at the same time it forms a second groove flank area 62. The groove flank areas 54, 62 and the groove bottom area 56 form a groove-like recess 64, in the form of a U-shaped metal profile 65, which has been shaped by folding outwardly in the sheet of box 28 of step sheet 20.

The outer layer of the flange 60 continues in the thickness direction and thus forms the front face 50 of the side of the lock of the leaf 20 and arrives, in the direction of the thickness, transversely through the thickness of the leaf of passage 20, to the area of the second wide face 46. In this area of the second wide face 46, the terminal area of the box plate is bent twice in the form of a U-profile in the transition between the front face 50 of the side of the lock and the second wide face 46, this U-profile 67 forming the groove sides, or groove flanks, and the groove bottom area of a groove 68 open inward, in the thickness direction, toward the fixed blade

The free side of this U-shaped configuration in the area of the second edge 66 forms a projection 70, which projects inwards in the direction of the thickness in the area of the second edge 66.

The cover plate 32 of the passage sheet is configured mostly flat to form the second wide face 46. In the area of the second edge 66, the cover plate extends beyond the U-shaped shape of the box plate 28 of the passage sheet 20 that forms the groove 68, and is folded around the marginal band zone 72 of the box plate 28 that forms the projection 70. Thus, in the passage sheet 20 , the cover plate 32 is hooked to the box plate 28, and the bend 74 of the marginal area of the cover plate 32 forms, together with the marginal band zone 72, the second projection 70 in the area of the second edge 66.

The box plate 28 of the fixed sheet 16 has a flat area of large area to form the first wide face 44 and is folded and completely folded back in the area of the third edge 76, in the transition between the first

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wide face 44 and the front face 50 of the lock side of the fixed leaf 16, so that, in the area of this third edge 76, an oblique flange 78 formed by several layers is formed which, on the one hand, forms a flank 80 of a profiled groove 82 in the area of the third edge 76 and, on the other hand, forms a projection 84 of the fixed leaf 16 protruding inwards and which, being the door closed, intervenes in the recess 64 in the form of leaflet groove 20.

The second groove flank area 62 of the passage leaf 20 and the groove flank 80 of the fixed leaf 16 form complementary metal step zones between them, which are grasped behind and hooked together in a geometric connection.

Following the flange 78, the box plate 28 of the fixed sheet 16 is configured so that it extends parallel to the first wide face 44, whereby two layers of the box plate 28 form a bottom 86 of the groove profiled 82. Next, the box plate 28 of the fixed sheet 16 is folded in the thickness direction and then extends transversely across the entire thickness of the fixed sheet 16, so as to form the front face 50 of the side of the fixed blade lock 16. Thus, the oblique flange 78 and this area of the box plate 28 extending in the thickness direction form the flanks 80 of the profiled groove 82, which is open inwardly in the thickness direction and, when the door is closed, houses the flange 60 configured as shoulder 58.

Thus, in the area of the first wide face, the grooves 68, 82 in the form of a U profile configured in opposite directions form a first grip behind 88, in which the first wrap plates 26 of the two sheets 14 , 18 fire door grab behind in the closed position of the door.

The front face 50 of the lock side of the fixed leaf 16 has the counter support plate 38 there where the passage leaf 20 has the standard lock 36. Moreover, the front face 50 of the lock side is formed by the area of the box plate 28 bent of the fixed sheet 16 which extends in the thickness direction transversely through the thickness of the fixed sheet 16 and which is bent backwards on itself in the area of the second wide face 46, to form, in the area of the fourth edge 90, which constitutes the transition between the front face of the lock side and the second wide face 46 on the fixed leaf 16, a projection 92 extending in the thickness direction. This projection 92, configured as a flange 94 by folding the case plate 28 and reinforced in the area of the lock by means of the counter-support plate 38, at the same time forms a first flank 96 of a slot-shaped recess 98 in the area of the fourth edge 90 on the fixed sheet 16, in which, in the closed position of the door, the projection 70 located on the second edge 66 of the step sheet 20 is inserted. This slot-shaped recess 98 it is formed by a terminal configuration in the form of a U profile of the outermost marginal area of the box plate 28 of the fixed sheet 16. In the area of the second flank 100 of this slot-shaped recess 98, the cover plate 32 and the box plate 28 of the fixed sheet 16 are hooked together by means of bends that are hooked together.

By means of the slot-shaped recess 98 and the slot 68 which is open in the opposite direction, a second grip is formed behind 102 in the area of the second wide face 46.

The grips on the back 88, 102 form a hitching structure on the back 104 made of metal, with which the fire door leaves 14, 18 are engaged behind in the closed position of the fire door 10, so that, if they have great flexion forces in case of fire, they support each other in geometric connection and thus avoid that one of the fire door leaves 14, 18 bends out in case of fire.

Between the respective projection 58, 70, 84, 92 and the recess 98, 64, 68, 82 in the form of a respective groove certain distances are also provided in the closed position of the door, so that, on the one hand, a dragging the door leaves 14, 18 when closing and opening them during normal use -in case of fire- and, on the other hand, in case of fire the respective door leaf 14, 18 may first deviate a little to compensate bracing forces until the hitch structures behind 104 are held in geometric connection.

Thanks to the rear hitch structures 104, the lock can be configured as a standard lock 36 with only one strike latch 42.

As can be seen from the representation of Figure 4, the fixed sheet 16 can be fixed in its closed position by means of simple closing pins 106, which intervene in an upper fence of the fence 12 and in a door threshold 108 arranged embedded in the ground .

A multi-leaf fire door 110 is shown in Figure 5 according to a second embodiment, with the fence 12 and with a first fire door leaf 114 in the form of a fixed leaf 116 and with a second fire door leaf 118 in shape of a step sheet 120.

The fire door blades 114, 118 are articulated in the fence 12 rotatably around a vertical axis by means of door bolts 122 and, in the closed position of the fire door 110, collect each other in a central joint area 124 .

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As can be seen in Figure 6, the fire door sheets 114, 118 are formed in each case by a first wrap sheet 126, in the form of a box plate 128, and a second wrap plate 130, in the form of a cover plate 132, and by an insulating pad 134 in the interior space of the door leaf formed by the box plate 128 and the cover plate 132.

In the central joint area 124, which is represented in Figure 6 and, enlarged, in Figure 7, the passage sheet 120 is provided with a standard lock 136 with a strike latch 142 and a bolt (not shown). The fixed blade 116 is provided with a counter support plate 138 with housing openings 140 for the strike latch 142 and the bolt.

The respective box plate 128 forms a first wide face 144, for example a face 145 opposite to the bolt, the fire door 110 and the respective fire door leaf 114, 118; and the cover plate 132 forms a second wide face 146, for example a pernio face 147, of the fire door 110 or of the respective fire door leaf 114, 118.

The vertical front faces in whose area the door bolts 122 are placed are called front faces 148 of the pernio side, while the front faces located in the central joint area 124, where the standard lock 136 and the counter support plate are housed 138, are called front faces 150 on the side of the lock.

As can be seen from Figure 7, in the area of the first edge 210, which is in the transition between the first wide face 144 and the front face 150 of the lock side of the passage sheet 120, the box plate 128 of the passage sheet 120 is bent obliquely inwards, starting from a large surface that forms the first wide face 144, to form a step flank 212, and then is driven parallel to the first wide face 144, to form a surface 214 of step.

In one configuration, the step surface 214 may have a sealing contact surface 213 for collecting and supporting a sealing profile 215 disposed on the first sheet 114 of fire door.

The step flank 212 and the step surface 214 form a stepped recess 216 in the form of a metal profile 218 more or less zigzag, which has been formed by bending in the box plate 128 of the step sheet 120.

The box plate 128 of the step sheet 120 continues in the thickness direction and thus forms the front face 150 of the lock side of the step sheet 120 and arrives, in the thickness direction, transversely through the thickness of step sheet 120, to the area of the second wide face 146. In this area of the second wide face 146, the terminal area of the box plate is folded twice in the form of a U-profile in the transition between the face front 150 of the lock side and the second wide face 146, this U-profile 167 forming the groove sides, or groove flanks, and the groove bottom area of a groove 168 open inward, in the direction of the thickness, towards the fixed blade.

The free side of this U-shaped configuration in the area of the second edge 166 forms a projection 170, which projects inwards in the direction of the thickness in the area of the second edge 166.

The cover plate 132 of the passage sheet is configured mostly flat to form the second wide face 146. In the area of the second edge 166, the cover plate extends beyond the U-shaped shape of the box plate 128 of the passage sheet 120 which forms the groove 168, and is folded around the marginal band zone 172 of the box plate 128 which forms the projection 170. Thus, in the passage sheet 120 , the cover plate 132 is hooked to the box plate 128, and the bend 174 of the marginal area of the cover plate 132 forms, together with the marginal band zone 172, the second projection 170 in the area of the second edge 166.

The box plate 128 of the fixed sheet 116 has a flat area of large area to form the first wide face 144 and is folded and completely folded back in the area of the third edge 176, in the transition between the first wide face 144 and the front face 150 of the lock side of the fixed blade 116, so that, in the area of this third edge 176, an oblique flange 178 formed by several layers is formed which, on the one hand, forms a flank 180 of a profiled groove 182 in the area of the third edge 176 and, on the other hand, forms a projection 184 of the fixed leaf 116 protruding inwards and which, being the door closed, intervenes in the stepped inlet 216 of the step sheet 120 .

Following the flange 178, the box plate 128 of the fixed sheet 116 is configured so that it extends parallel to the first wide face 144, whereby two layers of the box plate 128 form a bottom 186 of the groove profile 182. Next, the box plate 128 of the fixed sheet 116 is folded in the thickness direction and then extends transversely across the entire thickness of the fixed sheet 116, so as to form the face

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front 150 on the lock side of the fixed blade 116. Thus, the oblique flange 178 and this area of the box plate 128 extending in the thickness direction form the flanks 180 of the profiled groove 182, which is open inwards in the thickness direction. The profiled groove 182 can, for example, be used as a sealing groove 220 to accommodate and fix a sealing profile 215 provided on the first fire door leaf.

In the exemplary embodiment shown, the sealing profile 215 is in contact with the sealing contact surface 213 in the closed position and seals the face 145 opposite the pernio in relation to the pernio face 147 of the fire door 110.

The front face 150 of the lock side of the fixed blade 116 has the counter support plate 138 there where the passage sheet 120 has the standard lock 136. Moreover, the front face 150 of the lock side is formed by the area of the box sheet 128 bent of the fixed sheet 116 which extends in the thickness direction transversely through the thickness of the fixed sheet 116 and which is bent backwards on itself in the area of the second wide face 146, to form, in the area of the fourth edge 190, which constitutes the transition between the front face of the lock side and the second wide face 146 in the fixed blade 116, a projection 192 extending in the direction of the thickness. This projection 192, configured as a flange 194 by folding the case plate 128 and reinforced in the area of the lock by means of the counter-support plate 138, forms at the same time a first flank 196 of a slot-shaped recess 198 in the area of the fourth edge 190 on the fixed sheet 116, in which, in the closed position of the door, the projection 170 located on the second edge 166 of the passage sheet 120 is inserted. This slot-shaped recess 198 it is formed by a terminal configuration in the form of a U-profile of the outermost marginal area of the box plate 128 of the fixed sheet 116. In the area of the second flank 200 of this slot-shaped recess 198, the cover plate 132 and the box plate 128 of the fixed sheet 116 are hooked together by means of bends that are hooked together.

By means of the slot-shaped recess 198 and the slot 168 that is open in the opposite direction, a grip behind 202 is formed in the area of the second wide face 146.

The grip on the back 202 forms a hook-on-back structure 204 made of metal, with which the fire door sheets 114, 118 are engaged behind in the closed position of the fire door 110, so that, if large bending forces in case of fire, support each other in geometric connection and thus avoid that one of the fire door blades 114, 118 bends out in case of fire.

Between the respective protrusion 170, 184, 192 and the slot-shaped inlet 198, 168, 182 or the respective stepped inlet 216, certain distances are also provided in the closed position of the door, so that, on the one hand, it is avoided a drag of the door leaves 14, 18 when closed and opened during normal use -in case of fire- and, on the other hand, in case of fire the respective door leaf 114, 118 may first deviate a little to compensate for bracing forces until the hitch structure behind 204 is held in geometric connection.

Thanks to the back hitch structures 204, the lock can be configured as a standard lock 136 with only one strike latch 142.

As can be seen from the representation of Figure 8, the fixed sheet 116 can be fixed in its closed position by means of simple closing pins 206, which intervene in an upper frame of the fence 12 and in a door threshold 208 arranged embedded in the ground .

List of reference symbols 10 Fire door

12 Siege

14 First fire door leaf 16 Fixed leaf

18 Second fire door leaf

20 Step sheet

22 Door Bolts

24 Central junction zone

26 First wrap sheet

28 Box plate

30 Second wrap sheet

32 Cover plate

34 Stuffing

36 Standard Lock

38 Counter support plate

40 Accommodation opening

42 Hit Latch

44

46

48

fifty

52

54

56

58

60

62

64

65

66

67

68

70

72

74

76

78

80

82

84

86

88

90

92

94

96

98

100

102

104

106

108

110

114

116

118

120

122

124

126

128

130

132

134

136

138

140

142

144

145

146

147

148

150

152

154

156

158

160

162

164

165

First wide face Second wide face Frontal sides of the pernio side Frontal side of the lock side First edge

First groove flank zone Groove bottom zone Projection Flange

Second groove flank area

Slot-shaped incoming

Metal profile

Second edge

U Profile

Groove

Outgoing

Margin band zone of the box plate

Bending

Third edge

Oblique flange

Groove flank

Profiled groove

Outgoing

Groove bottom First grip behind Back edge Edge Flange

First groove flank Slot-shaped inlet Second groove flank Second grip on the back Hitching structure on the back Locking pin Door threshold Fire door First fire door leaf Fixed leaf

Second fire door leaf

Step sheet

Door bolts

Central Joint Zone

First wrap sheet

Cash plate

Second wrap sheet

Cover plate

Filling

Standard lock Counter-support plate Housing opening Hit latch First wide face Face opposite to the pernio Second wide face Pernio face

Frontal faces of the pernio side Frontal side of the lock side First edge

First groove flank zone Groove bottom zone Projection Flange

Second groove flank area Groove-shaped incoming Metal profile

166

167

168

170

172

174

176

178

180

182

184

186

188

190

192

194

196

198

200

202

204

206

208

210

212

213

214

215

216

218

220

Second edge U-profile Outgoing groove

Margin band zone of the box plate

Bending

Third edge

Oblique flange

Groove flank

Profiled groove

Outgoing

Groove bottom First grip behind Back edge Edge Flange

First groove flank Slot-shaped inlet Second groove flank Second grip on the rear Looping structure on the back Locking pin Door threshold First edge Step flank

Sealing contact surface

Step surface

Shutter Profile

Staggered entree

Metal profile

Shutter groove

Claims (14)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 1. Multi-leaf fire door (10, 110), with a first leaf (14, 114) of fire door, to be rotated around a first vertical axis, and with a second door leaf (18, 118) firewall, which has to be rotated around a second vertical axis, so that, when the fire door (10, 110) is closed, the fire door leaves (14, 18; 114, 118) collect each other, where the Fire door doors (14, 18; 114, 118) are constructed by wrapping sheets (26, 30; 126, 130) with a padding (34, 134) inside them, characterized by that, at least one wrap sheet (26, 126) of the first fire door leaf (14, 114) and one wrap plate (30, 130) of the second fire door leaf (18, 118) are configured in such a way which, in the closed position, grab behind each other or hook each other. 2. Multi-leaf fire door (10, 110) according to claim 1, characterized in that, the envelope sheet (26, 126) of the first sheet (14, 114) of the fire door and the envelope sheet (30, 130) of the second sheet (18, 118) of the fire door have configurations ( 62, 80; 162, 180) of complementary metal steps between sf for a hitch behind the leaves (14, 18; 114, 118) of fire door in the closed position of the fire door (10, 110). 3. Multi-leaf fire door (10, 110) according to one of the preceding claims, characterized in that, the door leaves (14, 18; 114, 118) have metal profiles (65, 67; 82, 98; 165, 167, 182, 198) which, when the door is closed, grab behind each other at along the entire height, or at least a large part of the height, of the front face (50, 150) of the side of the lock. 4. Multi-leaf fire door (10, 110) according to one of the preceding claims, characterized in that, one of the sheets (14, 18; 114, 118) of fire door has, on a wide face (44, 46; 144, 146), on its wrap sheet (26, 126) that forms this wide face (44, 144), in the area near the edge (52) with respect to the area of the front face (50, 150) of the side of the lock, a slot-shaped recess (64, 164) extending inwards in the thickness direction, and the other fire door leaf (14, 18; 114, 118) has a projection (84, 184) that protrudes inwards in the thickness direction, to intervene in the recess (64, 164) . 5. Multi-leaf fire door (10, 110) according to one of the preceding claims, characterized in that, in the closed position, the fire door blades (14, 18) are held behind the two transition zones between the front face (50) of the lock side and the first (44) and the second (46) faces widths of the respective fire door leaf (14, 18), so that on both wide faces (44, 46) a grip is formed behind (88, 102). 6. Multi-leaf fire door (10, 110) according to claim 4 and claim 5, characterized in that, one of the fire door leaves (18) has the recess (64) on one of the wide faces (44) and the other fire door leaf (14) has on this wide face (44) correspondingly the projection (84) and because, on the other wide face (46), one of the fire door leaves (18) has the projection (70) and the other fire door leaf (14) has the recess (82). 7. Multi-leaf fire door (10, 110) according to one of the preceding claims, characterized in that, at least one back hitch structure (104, 214) is formed by several wrapping layers (26, 30; 126, 130) folded and / or by at least one layer of the wrapping sheet (26, minus a reinforcing plate metal (38, 138). 8. Multi-leaf fire door (10, 110) according to claim 7, characterized in that, The metal reinforcement plate (s) is or is formed by a counter support lock plate (38) that serves as a counter support for a lock. 9. Multi-leaf fire door (10, 110) according to one of the preceding claims, characterized in that, the wrap plates (126, 130) are held behind each other or hooked together only in the area of one of the two wide faces (144, 146) of the fire door (110). of the plates of 30; 126, 130) and at and / or a plate of 5 10 fifteen twenty 25 10. Multi-leaf fire door (10, 110) according to one of the preceding claims, characterized in that, the wrap plates (126, 130) are held behind or hook only on the face (146) of pernio. 11. Multi-leaf fire door (10, 110) according to one of the preceding claims, characterized in that, in the closed position, the fire door blades (114, 118) are held behind in a transition zone between the front face (150) of the lock side and the first and second wide faces (144, 146) of the respective fire door leaf (114, 118), so that on a wide face (144, 146) a grip is formed behind. 12. Multi-leaf fire door (10, 110) according to claim 11, characterized in that, in the closed position, the grip behind (102, 202) extends along the entire length of the fire door blades (14, 18; 114, 118) in a direction parallel to the vertical axes. 13. Multi-leaf fire door (10, 110) according to one of claims 11 or 12, characterized in that, in a zone of the wide face (146) of the side of the pernio the grip is formed behind (202) and, in an area of the wide face (144) of the side opposite to the pernio, one of the door leaves (118) Firewall has a stepped recess (216) and the other sheet (114) of fire door has a projection (184) that intervenes in the staggered recess (216). 14. Multi-leaf fire door (10, 110) according to claim 13, characterized in that, the projection (184) located on the wide face (144) of the opposite side to the pernio of one of the fire door leaves (114) has a sealing groove (220), and the stepped recess (216) located on the wide face (144) on the opposite side of the other leaf (118) of the fire door has a sealing contact surface (213).