Fire damper with a casing having a casing wall and with two, preferably semi-circular or square shaped, damper blade halves which are pivotally mounted between an open position and a closed position, preferably centrally relative to the casing cross-section

Description

[0001] The invention relates to a fire damper with a housing having a housing wall and with two damper blade halves, preferably pivotally mounted centrally with respect to the housing cross-section, between an open position and a closed position, preferably semicircular or square, wherein each damper blade half has two opposite damper blade surfaces connected to one another by a circumferential end face, and wherein each damper blade half is pivotally mounted about an axis of rotation from its closed position to its open position against the restoring force of at least one spring element, wherein in their open position the two damper blade halves are aligned parallel to the flow direction and in their closed position the two damper blade halves are aligned perpendicular to the flow direction, and wherein the fire damper has at least one holding element,which holds the two damper blade halves in their open position and, in the event of a fire, preferably at a temperature between 70 °C and 95 °C, yields, preferably melts, so that the damper blade halves are pivoted into their closed position by the restoring force of the at least one spring element.

[0002] Each damper blade half is held in its closed position by the spring force of at least one spring element. If the damper blade halves are to be pivoted from their closed position to their open position, the restoring force of each spring element must be overcome for this movement.

[0003] Fire dampers with two damper blade halves, preferably semicircular or square in shape, which are preferably centrally located on the housing cross-section and pivotally mounted between an open position and a closed position and are held in an open position by a fusible holding element, are known from practice.

[0004] The disadvantage here is that the fire dampers cannot be checked for functionality from outside the fire damper. Furthermore, it is not possible to see from outside the fire damper whether the damper blade halves are in the closed or open position. Since the retaining element only triggers in the event of a fire, a test triggering of the fire damper from outside the fire damper is not possible. A functional test and inspection therefore require the complex disassembly of the fire damper and / or the air duct. However, one device that partially enables this is the fire damper known from US424748A.

[0005] The object of the invention is to avoid the aforementioned disadvantages and to provide a fire damper which enables the displacement of the damper blade surfaces to be checked from outside the fire damper.

[0006] This object is achieved in that the fire damper further comprises a tension element and a fixing device which can be actuated from outside the housing for fixing the tension element in a tensioned state in which the damper blade halves are in their open position, wherein the end of the tension element located inside the housing interacts directly or indirectly with the two damper blade halves and the other end of the tension element is guided outside the housing through a recess provided in the housing wall, so that the damper blade halves can be displaced from outside the housing by changing the tensile force on the tension element from their closed position to their open position and vice versa from their open position to their closed position,wherein the holding element is provided within the housing and is either formed as a component of the tension element or arranged between the tension element and at least one damper leaf half.

[0007] In a fire damper according to the invention, the two damper blade halves can have a common axis of rotation. Alternatively, each damper blade half can have its own axis of rotation. The damper blade halves can be made of calcium silicate, for example. Both damper blade halves preferably have the same shape and the same dimensions. Furthermore, at least one retaining element can hold the two damper blade halves directly or indirectly in their open position, wherein upon melting of the at least one retaining element, the at least one spring element displaces the damper blade halves into their closed position.

[0008] The fixing device serves to secure the tension element, which extends through the recess, in the respective position when tensioned. The fixing device can, for example, comprise a clamping mechanism, such as an eccentric. Other embodiments are also possible, such as an electromagnetic mount.

[0009] The fire damper according to the invention allows the displacement of the damper blade surfaces to be checked from the outside. Once the fixing device is released, the tension element is no longer fixed. As a result of the restoring force of the at least one spring element, the damper blade halves are moved from their open position to their closed position. By pulling on the end of the tension element protruding from the housing, the damper blade halves can be moved from their closed position to their open position against the restoring force of the at least one spring element. The fixing device can then fix the tension element again in the tensioned state. In this way, the fire damper according to the invention can be checked from the outside without disassembly whether a simple displacement of the damper blade halves has occurred and whether the damper blade halves are in their closed or open position.

[0010] Advantageously, the end of the pulling element protruding from the housing can, for example, have a handle or an eyelet for gripping the pulling element.

[0011] Advantageously, the distance between the recess on the one hand and the axis(es) of rotation of the damper blade halves on the other hand can be greater than the greatest distance between the axis(es) of rotation on the one hand and the housing wall on the other. With such a design, no deflection of the tension element is required.

[0012] Furthermore, one end of the tension element can be fixed to a flap fixing point associated with one of the two flap halves, and the other flap half can have a deflection device, preferably designed as an eyelet or hook, around which the tension element is deflected by the deflection device and against which the tension element engages in a pulling action. Such a configuration allows the two flap halves to be arranged close to one another in their open position.

[0013] Alternatively, the tension element can be designed in several parts in the longitudinal extension, forming at least two tension element sub-regions.

[0014] In addition, two tension element sections can be connected to one another directly or indirectly via at least one holding element.

[0015] It is advisable if two tension element sub-regions are provided, wherein in the first tension element sub-region one end is fixed to a flap fixing point which is assigned to one of the two flap leaf halves, and the other end is fixed to a housing fixing point assigned to the housing wall, that the other flap leaf half has a deflection device, preferably designed as an eyelet or hook, around which the first tension element sub-region is deflected by the deflection device and on which the first tension element sub-region acts in a pulling manner, and that the end of the second tension element sub-region located in the housing interacts via a connecting element with the region of the first tension element sub-region which is located between the end fixed to the inside of the housing wall and the deflection device. The end of the first tension element sub-region fixed to the housing fixing point can, for example, be fixed so as to penetrate through the housing wall.The connecting element can, for example, be a loop formed by the end of the second tension element sub-region. The first tension element sub-region is guided through the loop. The connecting element can, for example, also be a separate component, such as an eyelet. The connecting element can also be designed as a holding element at the same time. The flap fixing point, to which the end of the first tension element sub-region is fixed to the flap blade half, is preferably arranged as far away as possible from the axis of rotation of the respective flap blade half, viewed orthogonally to the axis of rotation. The deflection device is preferably arranged as far away as possible from the axis of rotation of the respective flap blade half, viewed orthogonally to the axis of rotation.Advantageously, the connecting means cooperates with the first tension element portion in the area located between the flap fixing point and the deflection device.

[0016] Furthermore, the connecting element can be arranged displaceably on the first tension element section. With such a configuration, the connecting element can slide along the first tension element section.

[0017] Alternatively, the connecting element can also be connected to the first tension element portion in such a way that the connecting element cannot slide along the first tension element portion.

[0018] Advantageously, two tension element sub-regions can be provided, wherein in the first tension element sub-region, one end is fixed to a flap fixing point assigned to one flap leaf half, and the other end is fixed to a flap fixing point assigned to the other flap leaf half, and the end of the second tension element sub-region located in the housing can interact with the region of the first tension element sub-region via a connecting element. The connecting element can, for example, be a loop formed by the end of the end of the second tension element sub-region located in the housing. The first tension element sub-region is guided through the loop. The connecting element can, for example, also be a separate component, such as an eyelet. The connecting element can also be designed as a holding element.The first tension element sub-region can also be designed as a holding element or at least comprise a holding element. Furthermore, the connecting element can prevent one tension element sub-region from sliding along the other tension element sub-region. It is also conceivable for the connecting element to enable one tension element sub-region to slide along the other tension element sub-region.

[0019] The flow cross-section can be divided into two flow halves by the axis of rotation(s) and the recess can be arranged in one flow half and the flap blade half having the deflection device can be arranged in the other flow half.

[0020] It is conceivable that the tension element can be designed as a chain or a cable. If the tension element is designed in several parts along its longitudinal extension, forming at least two tension element sub-regions, then at least one tension element sub-region, and preferably all tension element sub-regions, is designed as a chain or a cable.

[0021] Of course, other designs for the tension element are also conceivable. For example, the tension element could also be designed as a rod.

[0022] Advantageously, the retaining element can be designed as a fusible link. The fusible link can consist entirely of solder. However, it is also entirely possible for the fusible link to consist of, for example, two non-melting halves connected to one another via a single solder section or several solder sections. In the event of a fire, the solder melts, causing the damper blade halves, which are mechanically preloaded in the open position by the spring element, to be abruptly shifted from their open position to their closed position.

[0023] Furthermore, at least a partial area of ​​the tension element, preferably the entire tension element, can be designed as a holding element. If the tension element is designed entirely as a holding element, the tension element consists entirely of a fusible material. If only a partial area of ​​the tension element is designed as a holding element, the tension element, for example, when designed as a chain, comprises at least one chain link made of a fusible material, while the other chain links are made of metal, for example.

[0024] It is also conceivable that at least one damper blade half can be assigned a stop, preferably arranged in the housing, for supporting the respective damper blade surface in its open position. Both damper blade halves can have a common stop. Alternatively, each damper blade half can be assigned its own stop. A damper blade surface can rest against its assigned stop at a point or over its entire surface. This allows the position of the damper blade halves in their open position to be selected. Furthermore, the required length, position and orientation of the tension element can be varied. In addition, the flow in the fire damper can be influenced when the damper blade halves are in the open position.

[0025] Furthermore, at least one damper blade half can be assigned a stop, preferably arranged in the housing, for engaging the respective damper blade surface in its closed position. Both damper blade halves can have a common stop. Alternatively, each damper blade half can be assigned its own stop. A damper blade surface can, for example, rest against its assigned stop at a point or with part of its edge area. Such a stop has the particular advantage that the position of the damper blade halves in their closed position can be predetermined. This ensures that the damper blade halves adequately seal the fire damper in their closed position.

[0026] Advantageously, at least one flap half can have a cover section, preferably extending beyond the rotation axis, which, in the closed position of the flap halves, covers the gap existing between the two facing end surfaces. This cover section can ensure that the gap between the two flap halves is sealed in the closed position of the flap halves.

[0027] In addition, the fire damper can have a drive, preferably arranged outside the housing, wherein the drive is connected to the tension element so that the damper blade halves can be moved from their closed position to their open position by the drive by changing the tensile force on the tension element and vice versa from their open position to their closed position under the influence of the spring element. A spring return motor, for example, can be used as a drive. This allows motorized opening and closing of the damper blade halves and can be controlled by a building management system. The tension element is, for example, rolled up to move the damper blade halves from their closed position to their open position or unrolled to move the damper blade halves from their open position to their closed position.In the event of a fire, the actuator is triggered thermoelectrically, for example, at a temperature between 70 °C and 95 °C. The actuator also allows the tension element to be fixed in any position of the damper blade halves, for example, in the open position. In such a configuration, the actuator can include the fixing device.

[0028] Of course, the drive can also take on the function of the locking device, so that in such a case, no separate locking device is required. In this case, the drive is designed, for example, as a spring-return motor. When voltage is applied to the spring-return motor, the tension element is locked in place by the drive. When the voltage is removed, the drive "releases" the tension element, i.e., the tension element rolls out, so that the damper blade halves are pivoted into their closed position by the restoring force.

[0029] The fire damper can advantageously comprise a remote release device, preferably arranged outside the housing, wherein the remote release device preferably comprises a thermally and / or mechanically acting separating element for severing the tension element. Such a remote release device offers the advantage that the fire damper in question can be remotely released when connected, for example, to a central building control system or to a building management system. This means that in the event of a fire, a central building control system can also release those fire dampers that have not yet reached critical temperatures, thus preventing the spread of a fire in the building. If the remote release device does not comprise a thermally and / or mechanically acting separating element, the remote release device acts on the fixing device.With such a design, the tension element can continue to be used after the remote release device has been triggered. If the remote release device includes a thermally and / or mechanically acting separating element for severing the tension element, the tension element is severed by the separating element. Other embodiments are, of course, also conceivable.

[0030] The following are exemplary embodiments of the invention illustrated in the drawings. They show: Fig. 1 a first embodiment of a fire damper according to the invention, Fig. 2 the object according Fig. 1 in an exemplary installation situation, Fig. 3 load the object according to Fig. 2 in the closed position, Fig. 3bthe object after Fig. 2 in a transition position, Fig. 3c the object according to Fig. 2 in the open position, Fig. 4a an embodiment of a holding element, Fig. 4b the object according to Fig. 4a after triggering in case of fire, Fig. 5 the object after Fig. 2 with the holding element released, Fig. 6, the countersand Fig. 2 with triggered remote triggering device, Fig. 7 a second embodiment of a fire damper according to the invention with an electric drive, Fig. 8 a third embodiment of a fire damper according to the invention and Fig. 9 a fourth embodiment of a fire damper according to the invention.

[0031] In all figures, identical reference symbols are used for identical or similar components.

[0032] In the Fig. 1 bis 3a - c as well as 5 bis 9 Fire dampers 1 are shown which have a housing 3 having a housing wall 2 and two damper blade halves 4 which are mounted centrally with respect to the housing cross-section. Each damper blade half 4 has two opposite damper blade surfaces 6 which are connected to one another by a circumferential end face 5. The damper blade halves 4 are mounted so as to be pivotable about an axis of rotation 8 from their closed position to their open position and vice versa, counter to the restoring force of a spring element 7. In the exemplary embodiments shown, the two damper blade halves 4 have a common axis of rotation 8 which is arranged parallel to the end faces 5 which face one another in the closed position of the damper blade halves 4.

[0033] Also shown is a retaining element 9, which holds the two damper blade halves 4 in their open position during normal operation. In the event of a fire, for example, at a temperature between 70 °C and 95 °C, the retaining element 9 melts, as will be described below, so that the damper blade halves 4 are pivoted into their closed position by the restoring force of the spring element 7.

[0034] Also shown is a tension element 10. In the embodiments according to the Fig. 1 bis 3a - c as well as 5 and 6the tension element 10 is designed in several parts, viewed in its longitudinal extent, forming two tension element sub-regions 11. The end of the first tension element sub-region 11 is fixed to the housing wall 2. For this purpose, the housing wall 2 has a housing fixing point 25. This can be, for example, a small hole through which the end of the first tension element sub-region 11 is guided from the inside to the outside and fastened on the outside. Other designs of the housing fixing point 25 are also conceivable. For example, the housing fixing point 25 can also be designed as an eyelet to which one end of the tension element sub-region 11 is connected. The other end of the first tension element sub-region 11 is firmly fixed to one of the two flap leaf halves 4 at a flap fixing point 28. This flap fixing point 28 is designed as a pin in the present case. Other designs of the flap fixing point 28 are also conceivable.

[0035] The other of the two flap leaf halves 4 has a deflection device 12, which is designed as an eyelet. The first tension element section 11 is guided through the eyelet and is thereby deflected. Of course, other configurations of the deflection device 12, through or around which the first tension element section 11 is guided, are also conceivable.

[0036] The end of the second tension element section 11 located in the housing 2 is connected to the holding element 9. The first tension element section 11 and the second tension element section 11 are connected to one another via a connecting element 13 designed as a ring, wherein in this case a sliding connection exists. The other end of the second tension element section 11 extends through the housing wall 2 through a recess 14 and has a handle 15. The connecting element 13 engages the holding element 9 on the one hand and the first tension element section 11 on the other. When force is exerted on the handle 15, the connecting element 13 is moved along the length of the first tension element section 11.

[0037] In the illustrated embodiment, the two tension element sections 11 are connected to each other via a connecting element 13 designed as a ring. However, the connecting element 13 can also be formed by the holding element 9 itself.

[0038] As can be seen from the figures, a fixing device 16 is arranged at the recess 14 outside the housing 3, by means of which the second tension element section 11 can be secured. In the illustrated embodiment, the fixing device 16 has an eccentric. When the eccentric is displaced about its axis of rotation in the direction of arrow 29, a force is exerted on the second tension element section 11, thus securing it. The fixing device 16 can keep the tension element 10 under tension and thus hold the damper leaf halves 4 in their open position against the restoring force of the spring element 7. Fig. 1 The locking device 16 is in its locking position. When the eccentric is moved in the opposite direction to arrow 29, the eccentric is moved into its release position. This progressively reduces the force acting on the tension element 10, releasing the tension element 10 and moving the damper leaf halves 4 into their closed position.

[0039] Furthermore, the designs according to the Fig. 1 bis 3a - c as well as 5 bis 7 A remote release device 17 is provided, which is connected to the second tension element section 11 and is arranged outside the housing 3. The remote release device 17 is preferably remotely controlled and, for example, connected to a building control center. The remote release device 17 serves to sever the second tension element section 11, e.g., mechanically or thermally, and thus release the damper leaf halves 4. The remote release device 17 acts on the area of ​​the second tension element section 11 that is arranged between the housing 3 and the fixing device 16. The remote release device 17 can, for example, be designed as a cutting knife for cutting or, for example, as a cutting wire for thermal severing.

[0040] Furthermore, a stop 18 for the damper blade halves 4 is provided in the interior of the housing 3. In their open position, the damper blade halves 4 rest against this stop 18 with a portion of their mutually facing damper blade surfaces 6.

[0041] Furthermore, a stop 27 is arranged in the interior of the housing 3 on the opposite side of the rotation axis 8, against which the flap halves 4 rest in their closed position. The flap halves 4 rest against the stop 27 with a portion of their flap surfaces 6 facing away from the rotation axis 8. In the illustrated embodiment, the stop 27 is formed as a step-like, tapered portion of the housing wall 2.

[0042] Fig. 1 shows the fire damper 1 in its open position. The second tension element section 11 is pulled out from the interior of the housing 3 in such a way that the retaining element 9 rests against the inside of the housing wall 2. The first tension element section 11 is tensioned by the displacement of the second tension element section 11 on the one hand and the restoring force of the spring element 7 on the other. The damper blade halves 4 are thereby held in their open position. In their open position, the two damper blade halves 4 are aligned parallel to the flowing air (arrow 19) and rest against the stop 18. When the damper blade halves 4 are open, the air can flow in the direction of the arrow 19 or opposite to the direction of the arrow 19. The fixing device 16 is in its fixing position, so that the tension element 10 is tensioned. The fixing device 16 prevents any displacement of the second tension element section 11.

[0043] In Fig. 2 The fire damper 1 is shown in an exemplary installation situation. The casing 3 of the fire damper 1 is partially recessed into a building wall 20, whereby the fixing device 16 and the handle 15 are still accessible. Fig. 2 The fixing device 16 is in its deactivated state, i.e., in the release position. The eccentric exerts no force on the second tension element section 11 and does not secure it. As a result, the tension element 10 is free of tension. The damper blade halves 4 are accordingly in their closed position, with the two damper blade halves 4 aligned at right angles to the flow direction 19. Each damper blade half 4 rests against the stop 27 with its edge region of the damper blade surface 6 facing away from the rotation axis 8.

[0044] The Fig. 3a bis 3c represent the displacement path of the damper blade halves 4 of Fig. 2 to Fig. 1 represents. Fig. 3a shows the fire damper 1 in its closed position, Fig. 3b in a transitional position and Fig. 3c in their disclosure. In particular, the Fig. 3a bis 3c It can be seen what effect a tensile force acting on the handle 15, which is exerted by a user on the handle 15, has on the interior of the fire damper 1. The tensile force causes a displacement of the connecting element 13 and the holding element 9 in the direction of the recess 14. This increases the proportion of the first tensile element sub-region 11 that lies between the housing fixing point 25 on the inside of the housing wall 2 and the connecting element 13. As a result, the length of the first tensile element sub-region 11 between the end of the first tensile element sub-region 11 fixed to the damper blade half 4 at the damper blade fixing point 28 and the deflection device 12 decreases, whereby the damper blade halves 4 are displaced about the axis of rotation 8.

[0045] Fig. 3a shows the maximum distance between the flap fixing point 28 and the deflection device 12, with the flap leaf halves 4 in their closed position. Fig. 3c shows the minimum distance between the flap fixing point 28 and the deflection device 12, with the flap leaf halves 4 in their open position. Fig. 3b shows a distance between the flap fixing point 28 and the deflection device 12 which lies between the two extremes when the flap leaf halves 4 are between their open position and their closed position.

[0046] In Fig. 4a und Fig. 4b The holding element 9 is shown in an enlarged view. The holding element 9 is designed in two parts and consists of two identical, interlocking frame elements 21, which are held together by a fusible link (not shown). In the joined state, the frame elements 21 form two circular receptacles 22, to which, for example, the tension element sections 11 (not shown) or, for example, the connecting element 13, can be attached either firmly or slidingly. When the fusible link melts, the frame elements 21 separate, as shown in Fig. 4b shown, and thus release, for example, the attached tension element sections 11.

[0047] Fig. 5 shows the fire damper 1 with a triggered retaining element 9. After the retaining element 9 melts, the two tension element sections 11 are no longer positively connected. Thus, the tension element 10 can no longer transmit any force. The damper blade halves 4 are displaced into their closed position by the restoring force of the spring element 7 and rest against the stop 27.

[0048] In Fig. 6 the object is Fig. 2 after the remote release device 17 has been triggered. Due to the, for example, thermal severance of the second tension element section 11 by the remote release device 17, the tension element 10 no longer transmits any force. The damper leaf halves 4 are displaced into their closed position by the restoring force of the spring element 7 and rest against the stop 27. The retaining element 9 is not triggered.

[0049] In Fig. 7 1 shows an embodiment of the fire damper 1 according to the invention, in which the fixing device 16 is not designed as an eccentric, but as a motor drive 23, which is connected, for example, to a voltage network. The drive 23 can be, for example, a spring return motor. The drive 23 applies a permanent tensile force to the tension element 10. If the drive 23 is electrically operated, the drive 23 generates a tensile force when voltage is applied. The drive 23 could, for example, also have a mechanical spring element that exerts a torque on the rotational axis of the drive 23. By actuating the drive 23, the length of the tension element 10 inside the housing 3 can be changed by winding or unwinding the tension element 10. In addition, the drive 23 can be operated remotely and can therefore assume the function of the remote release device 17.

[0050] In the embodiment of the fire damper according to the invention according to Fig. 8 One end of the one-piece tension element 10 is firmly connected to one of the two flap leaf halves 4, in this case the lower flap leaf half 4 in this illustration, at the flap fixing point 28. This flap fixing point 28 can, for example, be designed as a pin protruding slightly from the flap leaf half 4, to which the relevant end of the tension element 10 is fixed. The other flap leaf half 4, in this case the upper flap leaf half 4 in this illustration, has a deflection device 12 designed as an eyelet, through which the tension element 10 is guided and deflected and on which the tension element 10 engages in a pulling manner. The holding element 9 is in turn provided within the housing 3. In the illustrated embodiment, the holding element 9 is designed as a component of the tension element 10.

[0051] Fig. 9 shows an embodiment of a fire damper according to the invention, in which the tension element 10, viewed in the longitudinal extension, is again designed in several parts to form two tension element sub-regions 11. The first tension element sub-region 11 is firmly fixed with its one end at the flap fixing point 28 to one damper blade half 4 and with its other end at the flap fixing point 28 to the other damper blade half 4. The end of the second tension element sub-region 11 located in the housing 3 interacts with the region of the first tension element sub-region 11 via the connecting element 13, which is slidably connected to the first tension element sub-region 11. In the illustrated embodiment, the connecting element 13 simultaneously also represents the holding element 9. In the illustrated embodiment, a deflection roller 24 is provided at a distance from the rotation axis 8, the rotation axis of which is aligned parallel to the rotation axis 8 of the damper blade halves 4.The second tension element section 11 is deflected by the deflection pulley 24. In the . Fig. 8 and 9 The other components of the fire damper 1, such as the remote release device 17, are not shown in detail.

[0052] As can be seen from the figures, the flow cross-section of the housing 2 is divided into two flow halves by the rotation axis 8. In the embodiments according to the Fig. 1 bis 8 the recess 14 is arranged in one flow half and the flap leaf half 4 having the deflection device 12 is arranged in the other flow half.

[0053] In all illustrated embodiments, the distance between the recess 14 on the one hand and the rotational axis 8 of the damper blade halves 4 on the other hand is greater than the greatest distance between the rotational axis 8 on the one hand and the housing wall 2 on the other hand. The greatest distance is understood to be the location of a damper blade half 4 with the largest radius.

Claims

1. A fire protection flap (1) with a housing (3) having a housing wall (2) and with two, preferably semi-circular or quadrangular flap halves (4) pivotably mounted between an open position and a closed position, preferably in the centre of the housing cross-section, wherein each flap half (4) has two opposing flap half surfaces (6), connected with one another by a circumferential frontal area (5), and wherein each flap half (4) is pivotably mounted around a rotational axis (8) against the resilience of at least one spring element (7) from its closed position into its open position, wherein, in its open position, the two flap halves (4) are aligned parallel to the direction of flow (19), and, in its closed position, both flap halves (4) are aligned at a right angle to the direction of flow (19), and wherein the fire protection flap (1) has at least one retaining element (9), which holds the two flap halves (4) in their open position and, in the case of fire, preferably at a temperature of between 70 °C and 95 °C, gives way, preferably melts, so that the flap halves (4) are swivelled by the resilience of said at least one spring element (7) into their closed position, wherein the fire protection flap (1) moreover comprises a traction element (10) and a fixing device (16) that can be actuated from outside the housing (3) to fix the traction element (10) in a tensioned state, in which the flap halves (4) are to be found in their open position, wherein the end of the traction element (10) located inside the housing (3) directly or indirectly interacts with the two flap halves (4), and the other end of the traction element (10) is routed to the outside of the housing (3) through a recess (14) provided for in the housing wall (2), so that, by changing the tensile force applied to the traction element (10), the flap halves (4) can be relocated from outside the housing (3), from their closed position into their open position, and vice versa, from their open position into their closed position, characterised in that the retaining element (9) is provided for within the housing (3), and designed either as a component of the traction element (10) or is placed between the traction element (10) and at least one flap half (4).

2. The fire protection flap (1) in accordance with the preceding claim, characterised in that the distance between the recess (14), on the one hand, and the rotational axis / axes (8) of the flap halves (4), on the other hand, is greater than the greatest distance between the rotational axis (the rotational axes) (8), on the one hand, and the housing wall (2), on the other hand.

3. The fire protection flap (1) in accordance with one of the preceding claims, characterised in that one end of the traction element (10) is fixed at a flap fixing point (28), which is assigned to one of the two flap halves (4), and the other flap half (4) has a deflection device (12), preferably designed as a lug or a hook, around which the traction element (10) is diverted by the deflection device (12) and with which the traction element (10) engages by pulling on it.

4. The fire protection flap (1) in accordance with one of claims 1 or 2, characterised in that the traction element (10), viewed in its longitudinal orientation, is designed as a number of parts, together forming at least two traction element sub-areas (11).

5. The fire protection flap (1) in accordance with the preceding claim, characterised in that two traction element sub-areas (11) are connected with one another via at least one retaining element (9).

6. The fire protection flap (1) in accordance with one of claims 4 or 5, characterised in that two traction element sub-areas (11) are provided for, wherein, in the case of the first traction element sub-area (11), one end is fixed to a flap fixing point (28), which is assigned to one of the two flap halves (4), and the other end to a housing fixing point (25) assigned to a housing wall (2), and the other flap half (4) has a deflection device (12), preferably designed as a lug or a hook, around which the first traction element sub-area (11) is diverted by the deflection device (12) and with which the first traction element sub-area (11) engages by pulling on it, and the end of the second traction element sub-area (11) located in the housing (3) interacts with the area of the first traction element sub-area (11) located between the end fixed to the inside of the housing wall (2) and the deflection device (12), via a connecting element (13).

7. The fire protection flap (1) in accordance with the preceding claim, characterised in that the connecting element (13) is slidably disposed on the first traction element sub-area (11).

8. The fire protection flap (1) in accordance with one of claims 4 or 5, characterised in that two traction element sub-areas (11) are provided for, wherein, in the case of the first traction element sub-area (11), one end is fixed to a flap fixing point (28), which is assigned to the one flap half (4), and the other end to a housing fixing point (28) assigned to the other flap half (4), and the end of the second traction element sub-area (11) located in the housing (3) interacts with the area of the first traction element sub-area (11) via a connecting element (13).

9. The fire protection flap (1) in accordance with one of claims 3 to 8, characterised in that the cross-section of flow is split into two halves of current through the rotational axis / axes (8), and the recess (14) is disposed in one half of the current and the flap half (4) has the deflection device (12) disposed in the other half of the current.

10. The fire protection flap (1) in accordance with one of the preceding claims, characterised in that the traction element (10) is designed as a chain or a rope.

11. The fire protection flap (1) in accordance with one of the preceding claims, characterised in that the retaining element (9) is designed as a fusible link.

12. The fire protection flap (1) in accordance with one of the preceding claims, characterised in that at least one sub-area of the traction element (10), preferably the complete traction element (10), is designed as a retaining element (9).

13. The fire protection flap (1) in accordance with one of the preceding claims, characterised in that at least one flap half (4) is assigned to a stopper (18), preferably located in the housing (3), for abutting the respective flap half surface (6) in its open position.

14. The fire protection flap (1) in accordance with one of the preceding claims, characterised in that at least one flap half (4) is assigned to a stopper (18), preferably located in the housing (3), for abutting the respective flap half surface (6) in its closed position.

15. The fire protection flap (1) in accordance with one of the preceding claims, characterised in that at least one flap half (4) has a covering portion, which, in the closed position of the flap halves (4), covers the gap existing between the two frontal areas (5) facing one another.

16. The fire protection flap (1) in accordance with one of the preceding claims, characterised in that the fire protection flap (1) has a drive (23), preferably located outside the housing (3), wherein the drive (23) is connected to the traction element (10), so that the flap halves (4) can be relocated from their closed position into their open position and vice versa by the drive (23), by altering the tensile force applied to the traction element (10), under the influence of the spring element (7).

17. The fire protection flap (1) in accordance with one of the preceding claims, characterised in that the fire protection flap (1) comprises a remote tripping device (17), preferably located outside the housing (3), wherein the remote tripping device (17) preferably comprises a thermally and / or mechanically-operating separating element, for splitting the traction element (10).