Linkages for door operators

Abstract

The invention relates to a connecting rod (1) for transmitting force between a driven axis (102) of a door operator (101) and a mounting surface (105), comprising: a hinge (2); a fixing device (8), which is designed to fix the hinge (2) to a mounting surface (105), in particular a door, a frame or a wall, wherein the mounting axis (106) is defined perpendicular to the mounting surface (105); and a lever device (10), which is rotatably fixed to the hinge (2) about a hinge axis (6) perpendicular to the mounting axis (106) and is designed to be connected to the driven axis (102) of the door operator (101) in a torsionally fixed manner, wherein the connecting rod (1) is designed to be disengaged by the weight of the door operator (101) falling in the event of a fire, and / or wherein the connecting rod (1) includes a heat-activatable trigger element (32), which is designed to disengage the connecting rod (1) in the event of heat activation triggered by a fire.

Description

Technical Field

[0001] The invention relates to a connecting rod for transmitting force between a driven axis of a door operator and an associated mounting surface. In addition, the invention also shows an arrangement consisting of the connecting rod and the door operator. Background Art

[0002] Door operators are used to close and / or open doors. Door closers and door drives are particularly referred to as door operators. In door closers, a spring energy accumulator is typically charged by a manual opening motion. The stored energy is used to close the door. In door drives, the door can be opened and / or closed autonomously, for example, using electromechanical or hydraulic mechanisms. Door operators are typically attached to the door leaf, door frame, or wall.

[0003] Door operators are often used in conjunction with a connecting rod. The connecting rod is used to transmit force from the door operator's driven axis to the connecting rod's mounting surface. The connecting rod is typically attached to the door leaf, the frame, or the wall. For example, if the door operator is attached to the door leaf, the connecting rod is attached to the frame or wall, and vice versa.

[0004] Especially with fire-resistant doors, it is important to note that flammable fluids, particularly hydraulic oil, are often used in the door operator. Appropriate measures should be taken to prevent the fluid in the door operator from being heated excessively and potentially ignited in the event of a fire. For example, it is proposed that the door operator be secured to its mounting surface using fusible screws. If these fusible screws heat up in the event of a fire, the door operator could fall from its mounting surface. Summary of the Invention

[0005] The object of the present invention is to provide a linkage for a door operator which enables operationally safe use of the door and at the same time meets all safety-relevant requirements, in particular with regard to fire situations.

[0006] It has been recognized that if in the event of a fire the door operator simply detaches from its mounting surface and falls, this is not sufficient in all applications. That is, in general the door operator then continues to hang on its connecting rod and may be too close to the door which is heating up.

[0007] The linkage described below provides a remedy here, since it enables the door operator to drop completely in the event of a fire.

[0008] The connecting rod is provided for force transmission between a driven axis of the door operator and a mounting surface for the connecting rod. The driven axis of the door operator is, in particular, a rotatable axis provided on or in the door operator. The mounting surface is, in particular, a door leaf, a frame, or a wall. A mounting axis is defined perpendicular to the mounting surface. Typically, the mounting axis is horizontal and perpendicular to the frame, the wall, or the door leaf.

[0009] The connecting rod comprises a hinge and a fixing device. The fixing device is configured to fix the hinge to the mounting surface. In a simple design, the fixing device comprises one or more screws extending parallel to the mounting axis in order to tighten the hinge to the mounting surface.

[0010] The hinge preferably includes at least one hinge base, which is oriented substantially perpendicular to the mounting axis and rests against the mounting surface directly or via corresponding intermediate elements. Preferably, at least one hinge leg extends from the hinge base. Particularly preferably, two parallel hinge legs spaced apart from one another are provided. At least one hinge leg preferably holds a hinge pin. The hinge pin preferably extends vertically and defines the hinge axis.

[0011] Furthermore, a lever arrangement is provided in the connecting rod. The lever arrangement is rotatably fastened to the hinge, in particular to the hinge pin, about a hinge axis perpendicular to the mounting axis. Furthermore, the lever arrangement is designed for a rotationally fixed connection to the driven axis of the door operator.

[0012] The lever arrangement is preferably a scissor linkage. This scissor linkage comprises a first lever, which is directly or indirectly connected to the hinge, and a second lever, which is connected in a rotationally fixed manner to the output axis of the door operator, in particular via a lever eye. The two levers are connected to each other via a joint, in particular a ball joint.

[0013] It is particularly preferred that the first lever comprises two elements whose lengths are adjustable relative to one another, for example, a tensioning screw and a tensioning nut. The tensioning screw in this case comprises, in particular, a threaded rod. The tensioning nut is preferably an elongated lever-shaped element having an internal thread on one side for screwing into the tensioning nut.

[0014] Furthermore, it is preferably provided that the lever arrangement includes a connecting element. The connecting element is preferably connected to the first lever, in particular a tensioning screw, via a rotary joint. The rotary joint preferably has a rotary joint pin defining a rotary joint axis. The rotary joint pin can also be formed by two coaxial pin elements. The rotary joint axis is preferably horizontal and / or perpendicular to the hinge axis. The connecting element is preferably rotatably connected to the hinge. In particular, the hinge pin extends through the connecting element.

[0015] Preferably, the connecting rod is designed to release due to the weight of the door operator if it falls in the event of a fire. As described, the connecting rod is used together with the door operator. The door operator is preferably fixed to its mounting surface so that it falls in the event of a fire. This can be achieved, for example, by fixing the door operator with a fusible screw; however, other variations are also possible, such as by pressing the door operator away from its mounting surface using a thermally expandable material to release the door operator at the appropriate temperature. The connecting rod is preferably designed so that the weight of the door operator is sufficient to release it. Release of the connecting rod is understood to mean that the connecting rod releases at a certain point, such as at a rotary joint, a hinge, or a fastening device, allowing the door operator to fall completely. Conventional door closers weigh between 1 kg and 5 kg, and taking into account the corresponding lever forces, this is sufficient to cause the connecting rod to release as desired. Door drives typically weigh significantly more, approximately 10 kg to 30 kg.

[0016] In addition to or as an alternative to disengaging the connecting rod by the weight of a falling door operator in the event of a fire, it is preferably provided that the connecting rod includes at least one heat-activatable triggering element. This heat-activatable triggering element is designed to disengage the connecting rod in the event of thermal activation triggered by a fire. In this variant, not only is the door operator disengaged from its mounting surface via a heat-activatable element, such as a fusible screw, but heating is also simultaneously applied in the area of the connecting rod, particularly in the area of the fastening device or hinge, thereby thermally activating the triggering element. Variants and designs of the triggering element will be described in more detail below.

[0017] It is also proposed to combine these two variants into one linkage, so that the linkage is simultaneously designed for release by the weight of a falling door operator and also comprises a heat-activatable triggering element for release of the linkage.

[0018] It is preferably proposed that a stop element is provided at the rotary joint or hinge. The stop element is designed and arranged so that it holds the rotary joint or hinge together. The stop element is in particular designed as a stop sleeve, a stop connecting plate, a stop cotter pin or a stop screw. By lowering the first lever, the stop element can be moved into a position in which the rotary joint or hinge is no longer held together. This movement, i.e. the lowering of the first lever, takes place when the door operator is disengaged from its mounting surface and the lever arrangement is pulled downwards by its weight. This movement by means of the lowering first lever serves to move the stop element into a position in which it no longer holds the rotary joint or hinge together.

[0019] The locking element, in particular a locking sleeve, is inserted onto the rotary joint and surrounds the rotary joint, wherein the rotary joint is released by removing the locking sleeve.

[0020] The locking element, in the form of a locking plate, is inserted, in particular, onto or on the hinge pin or swivel joint pin. In particular, the locking plate has a U-shaped receptacle that engages a recess in the corresponding pin. The locking plate thus acts on the pin from the outside and prevents it from being released from the hinge or swivel joint.

[0021] A similar function is fulfilled by a locking cotter pin which does not act externally on the bolt but is inserted through a hole in the bolt.

[0022] When the locking element is designed as a stop screw, an element of the hinge or rotary joint, in particular a bolt, is held in its position by means of the stop screw, wherein it is particularly provided that the stop screw is broken in order to disengage the hinge or rotary joint. In this case, the stop screw itself may be broken or pulled out of its thread.

[0023] As already described, it is preferably proposed that the lever is connected to the connecting element via the axis of the rotary joint. An important component of the first lever extends from this axis of rotation to the ball joint and thus to the connection with the second lever. However, it is preferably proposed that a small portion of the first lever protrudes from the axis of the rotary joint toward the hinge. This protruding portion is called the operating section. When the lever arrangement is lowered, in particular when the second lever and the first lever of the ball joint are lowered, the first lever rotates about the axis of the rotary joint. As a result, the operating section is raised. The operating section and the stop element are preferably arranged and constructed so that the stop element is moved into a position that does not hold the hinge or the rotary joint together due to the upward movement of the operating section.

[0024] As mentioned, it is preferably proposed that the locking element is formed as a locking sleeve, which is sleeved on the rotary joint. In this case, it is preferably proposed that the rotary joint includes a U-shaped, downwardly open first bolt receptacle. This first bolt receptacle is formed on the connecting element and / or the first lever. During normal use of the connecting rod, the rotary joint bolt is inserted into this first bolt receptacle. The locking sleeve has a second bolt receptacle. The second bolt receptacle of the locking sleeve is also U-shaped and open to the side, so that the locking sleeve inserted into the rotary joint and thus also into the rotary joint bolt holds the rotary joint bolt in its desired position, i.e., in the first bolt receptacle. As soon as the locking sleeve is removed from the rotary joint, in particular pushed away, in particular by the raised operating section of the first lever, the rotary joint is disengaged because the rotary joint bolt can move downward out of the first bolt receptacle.

[0025] Preferably, a fixing element is provided on the stop sleeve to prevent accidental removal of the stop sleeve during normal use of the connecting rod. For example, the fixing element is a plastic screw, with the aid of which the stop connecting plate is screwed to the connecting element or the first lever. When the stop connecting plate is removed via the operating section, the plastic screw breaks. It is also possible that at least one projection extends horizontally from the first lever as a fixing element. As long as the first lever is in its normal horizontal position, this fixing element designed as a projection blocks the movement of the stop connecting plate. When the first lever is lowered, the fixing element also moves downward and releases the movement path for the stop connecting plate.

[0026] In an alternative embodiment, it is provided that a locking element on the hinge, in particular a hinge pin, is disengaged by lowering the first lever and thereby moving the actuating section upward.

[0027] As mentioned at the outset, the hinge has one or two hinge legs extending from the hinge base, in which the hinge pin is accommodated. To facilitate the uncoupling of the hinge, for example, to disconnect the connecting element from the hinge pin or to drop the hinge pin, it is preferably provided that only one hinge leg is used instead of two hinge legs spaced apart from one another. This one hinge leg is located either on the upper side, i.e., above the connecting element, or on the lower side, i.e., below the connecting element.

[0028] The locking element, in particular as a locking tab or locking cotter pin, is preferably arranged and designed such that it can be removed from the hinge bolt via the actuating section. This ensures that only the hinge bolt, which is locked by the locking element, falls downward out of the hinge, whereby the connecting element and thus the entire lever arrangement are disconnected from the hinge. Alternatively, the connecting element can also be disconnected from the hinge bolt.

[0029] Furthermore, it is proposed that, when a hinge leg is arranged above the connecting element, the hinge bolt is secured to the hinge leg from above by a coaxial locking screw inserted into the hinge bolt. The actuating section is arranged and designed so that it deforms the hinge leg upward, thereby breaking the locking screw or pulling it out of its thread. This also allows the locking bolt to be disengaged from the hinge. It should be understood that the locking screw is appropriately selected in terms of material and strength so that it disengages under the typical weight forces caused by a falling door operator.

[0030] In addition to or as an alternative to disconnecting the connecting rod at a rotary joint or hinge, it is preferably provided that the ball joint connecting the two levers is designed to be disconnected by the weight of a falling door operator. In particular, the first lever and the second lever each have a projection, through which the respective lever protrudes from the ball joint. When the door operator falls, the second lever first falls with it, whereby the two levers rotate relative to each other on the ball joint and the two projections come into contact. The ball joint is preferably designed to be unstable so that it can be disconnected by the forces occurring thereby, for example, the ball element slides out of its corresponding seat. Preferably, a vertical adjustment screw can be provided in the first or second lever in the region of the two projections, which adjusts the distance between the two projections.

[0031] As described at the outset, the connecting rod can include at least one thermally activatable trigger element. This trigger element is preferably arranged in the region of the fastening device so that upon thermal activation, it causes the fastening device to be released and thus the hinge to be released from its mounting surface. In particular, the thermally activatable trigger element can be positioned as close as possible to the mounting surface in the region of the fastening device, preferably in direct contact with the mounting surface, so that in the event of a fire, it rapidly heats up.

[0032] This is naturally also always based on the fact that the connecting rod and the door operator are located on the side of the door facing away from the fire. Therefore, the fire first heats up the door frame and the door leaf and thus the mounting surface of the connecting rod and the door operator facing away from the fire.

[0033] The trigger element is thermally activatable, particularly in a temperature range of 90°C to 200°C. "Activating the trigger element" is a synonym for "triggering the trigger element." For example, the trigger element is an ampoule, particularly a glass ampoule filled with a fluid, such as is known from sprinkler systems. The trigger element is designed to trigger at a temperature suitable for preventing ignition of the liquid in the door operator.

[0034] Furthermore, the triggering element can be configured as a melting element. In particular, the melting element is composed of plastic. The melting element is also configured such that it is preferably “triggered” at the above-mentioned temperature and thus plastically deformed.

[0035] Furthermore, the triggering element can be made of a thermally expandable material which preferably undergoes a volume expansion at the aforementioned temperatures.

[0036] Furthermore, it is proposed that the triggering element is produced from a shape memory material, for example a shape memory spring, wherein the triggering element preferably changes its shape, for example contracts, expands or bends, due to the aforementioned temperature.

[0037] This means that it is essentially provided that the triggering element is destructible and / or deformable and / or meltable upon thermal loading or thermal activation.

[0038] It is preferably provided that the fixing device comprises a hinge carrier. The hinge carrier is fixed to the mounting surface, for example by means of corresponding screws. When the connecting rod is disengaged, in particular when the fixing device is disengaged, the hinge falls off the hinge carrier.

[0039] Preferably, at least one blocking element is provided, which can be moved from a holding position into a release position. The blocking element is preferably movably fixed to the hinge carrier or the hinge frame, ie either to the hinge base or to the hinge leg.

[0040] In its retaining position, the blocking element is designed to retain the hinge on the hinge carrier. In its released position, the blocking element releases the hinge, allowing it to detach from the hinge carrier. When the trigger element is thermally activated, it can immediately cause the blocking element to move into the released position. This is possible, for example, if the trigger element is constructed from a thermally expandable material, which, due to its increased volume, can exert a force on the blocking element. Alternatively, it is also proposed that the trigger element releases or allows the blocking element to move into its released position when it is thermally activated. The force required for the movement is then applied separately, for example, by a preloaded spring or by the weight of a connecting rod or door operator.

[0041] It is preferably provided that the hinge, in particular via its hinge base, is inserted on one side beneath the bracket of the hinge support. On the opposite side, the hinge is secured by a blocking element. Thus, when the blocking element is moved into the release position, the securing on one side is omitted, so that the hinge is tilted away from the hinge support and also released from the bracket.

[0042] In particular, it is proposed that the blocking element is designed as a rotatably mounted pivot bolt. In particular, the pivot bolt is rotatably mounted about a pivot bolt rotation axis. In particular, the pivot bolt is rotatably mounted on the hinge carrier. The pivot bolt rotation axis is preferably parallel to the hinge axis.

[0043] The pivoting bolt preferably comprises two legs. The bolt's axis of rotation is preferably disposed between the two legs. One leg maintains the hinge and directly or indirectly acts on the trigger element on the other leg to block the bolt's rotational movement. In other words, as long as the trigger element is not triggered, the bolt's rotational movement is blocked and the bolt is in the retained position.

[0044] The trigger element is particularly arranged so that it is exposed on the rear side of the hinge support facing the mounting surface, so that the trigger element is in direct contact with the mounting surface. To this end, the trigger element is preferably fixed to the hinge support by means of a locking connection so that the trigger element cannot fall out of the rear side of the hinge support before mounting.

[0045] In particular, when using a pivoting bolt, it is proposed that the triggering element is designed as a melting element. Once the melting element is deformed due to thermal activation, a rotational movement of the pivoting bolt becomes possible: the weight acting on the hinge (due to the weight of the connecting rod and / or the door operator) generates a force on the first leg of the pivoting bolt, thereby generating a torque about the pivoting bolt's axis of rotation, wherein the movement of the second leg is no longer blocked by the deformed melting element. The pivoting bolt thus moves into the released position.

[0046] Alternatively, it is also possible to use at least one ampoule as a triggering element, which acts directly or indirectly on the second leg similar to a melting element and thus prevents the rotational movement of the pivoting latch. By thermal activation and thus by destroying the at least one ampoule, this blocking of the rotational movement of the pivoting latch is eliminated.

[0047] Alternatively to a pivoting latch, the blocking element is designed as a linearly movable latch. In particular, the linearly movable latch moves in a plane perpendicular to the mounting axis, for example, perpendicular to the pivot axis. Here, upon thermal activation, the trigger element can move the latch, i.e., press or pull it into a released position, or release a spring-loaded latch to move into the released position. For example, a thermally expandable material can press the latch into its released position. For example, by melting an element or an ampoule, it is possible to release a preloaded spring so that the latch moves by means of the spring force.

[0048] Even when using a movable locking tongue, it is preferably provided that the hinge is pushed under the bracket of the hinge support on one side and is held on the opposite side by means of the locking tongue.

[0049] In other variants, it is also possible to provide a plurality of blocking elements which fix the hinge at a plurality of points relative to the hinge carrier. The hinge can be released from the hinge carrier by disengaging these blocking elements or by moving these blocking elements into a release position.

[0050] In particular, the blocking elements are designed as bolt elements. These bolt elements extend through the hinge and the hinge carrier, thereby holding the hinge and the hinge carrier together. For example, the hinge carrier is U-shaped, having two opposing legs. The hinge, in particular the hinge bracket, is inserted between the two opposing legs. The connection between the hinge carrier and the hinge is achieved via vertical bolt elements. In particular, the blocking elements designed as bolt elements can be moved parallel to the hinge axis into their released position.

[0051] In other variants, it is proposed that the fixing device comprises one or more screws, by means of which the hinge is fixed to the mounting surface, wherein the screw head support or the recess, in particular the size of the hole, is variable so that upon thermal activation the screw head passes through its recess and the hinge can be detached from the screw of the fixing device.

[0052] In order to disengage the hinge from the fixing screw, it is preferably proposed that the triggering element is designed as a melting element. The melting element has a first recess for the fixing element, in particular a screw. The hinge, in particular the hinge base of the hinge frame, has a second recess for the same screw. The two recesses are aligned. In the normal fixed state, the screw extends through the two recesses. The screw head rests on the melting element. The melting element can extend through the second recess so that it is in direct contact with the mounting surface. The diameter of the second recess is larger than the diameter of the first recess. In particular, the diameter of the second recess is larger than the diameter of the screw head. After the melting element melts or deforms, the head is no longer held by the melting element, so that the head moves through the second recess.

[0053] As an alternative to a melting element, a triggering element comprising a heat-expanding material in combination with a retaining element can also be used. The heat-expanding material is provided for moving the retaining element upon thermal activation. The retaining element has a first recess for a screw. In the fixed state, the screw head thus rests against the retaining element. The hinge, in particular the hinge base, has a second recess, which is aligned with the first recess. The diameter of the second recess is in turn larger than the diameter of the first recess and in particular larger than the diameter of the screw head. Due to the thermal activation and the resulting movement of the retaining element, the retaining element or the first recess is pushed or pulled under the screw head, making it possible to move the screw head through the second recess, thereby disengaging the hinge from the at least one screw.

[0054] In particular, the retaining element is a bent element. At least one first recess is provided on one leg of the retaining element. The expansion material acts on the other leg of the retaining element, thereby supporting it, in particular, against the second leg and the hinge. When thermally activated, the heat-expandable material presses the retaining element away from the hinge, in particular, away from one of the two hinge legs.

[0055] Preferably, in combination with the retaining element, at least one melting element, for example an intermediate plate, is provided between the hinge and the mounting surface. The intermediate plate deforms when heated and thus reduces the preload of the screw, thereby enabling slight movements of the retaining element.

[0056] Another variant for disengaging the fixing device provides that the trigger element is positioned as a thermal expansion material so as to be arranged between the hinge and the mounting surface. For this purpose, the trigger element or the trigger elements can be positioned on the back side of the hinge base plate. In addition, it is also possible to use a mounting bracket between the hinge and the mounting surface, in which the thermal expansion material is arranged. When thermally activated, the thermal expansion material expands and thus presses the hinge away from the mounting surface, thereby destroying the fixation, for example twisting, and thus disengaging the hinge from the mounting surface. When using the mounting bracket, the entire mounting bracket or a part of the mounting bracket may be disengaged from the mounting surface together with the hinge. Alternatively, the mounting bracket can be designed so that the mounting bracket remains completely at the mounting surface and the thermal expansion material presses the hinge away from the mounting bracket.

[0057] Alternatively or in addition to releasing the fixing device by a heat-activated trigger element, and / or alternatively or in addition to releasing the connecting rod by the weight of the door operator, it is preferably proposed that the hinge, i.e. the connection between the hinge frame and the connecting element, can be released by a heat-activated trigger element.

[0058] In particular, it is proposed that a locking element is provided on the hinge. In this variant, the locking element is in particular designed as a locking plate or a locking cotter pin. In particular, the locking element prevents the connecting element from being detached from the hinge bolt if the lever arrangement falls. Accordingly, it is preferably proposed that the hinge has hinge legs only on the upper side of the connecting element, so that the connecting element can slide downwards from the hinge bolt. In normal use, the connecting element is protected from falling by the locking element. However, regardless of whether one or two hinge legs are used, the hinge bolt can also be protected from falling out by the locking element. In both variants, the hinge can be detached by removing the locking element; the hinge is detached by the connecting element falling from the hinge bolt or by the hinge bolt being detached from at least one hinge leg.

[0059] The heat-activatable trigger element is configured to remove the locking element itself or release the spring force to remove the locking element when heat activated. For example, the trigger element can act as an ampoule to block a prestressed tension or compression spring, wherein after the ampoule is destroyed, the spring removes the locking element.

[0060] Furthermore, it is preferably provided that the triggering element is formed from a shape memory material, for example as a shape memory spring which can contract when thermally activated and thus pull the locking element.

[0061] The invention also includes a device. The device comprises the connecting rod described and a door operator. The door operator is in particular a door closer or a door drive. The connecting rod is in particular connected to the driven axis of the door operator. The door operator or the mounting bracket on the door operator is designed to enable the door operator to be disengaged from its mounting surface when thermal activation is triggered in the event of a fire. For this purpose, for example, the above-mentioned fusible screws can be used to fix the door operator. However, the described mounting bracket with thermal expansion material can also be used in the area of the door operator in order to press the door operator away from its mounting surface in the event of a fire and thus disengage it. In particular, the door operator weighs 1 kg to 30 kg so that the disengagement of the connecting rod can be caused by its weight as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The present invention will now be described in detail based on an embodiment. Here, it is shown:

[0063] Figure 1 The device according to the invention with the connecting rod according to the invention and the door operator is shown for all embodiments,

[0064] Figures 2 to 6 A connecting rod according to the invention is shown according to a first embodiment,

[0065] Figures 7 to 9 A connecting rod according to the invention is shown according to a second embodiment,

[0066] Figure 10 A connecting rod according to the invention is shown according to a third embodiment,

[0067] Figures 11 to 13 A connecting rod according to the invention is shown according to a fourth embodiment,

[0068] Figure 14 A connecting rod according to the invention is shown according to a fifth embodiment,

[0069] Figures 15 to 16 A connecting rod according to the invention is shown according to a sixth embodiment,

[0070] Figures 17 to 18 A connecting rod according to the invention is shown according to a seventh embodiment,

[0071] Figures 19 to 20 shows a connecting rod according to the invention according to an eighth embodiment,

[0072] Figures 21 to 23 A connecting rod according to the invention is shown according to a ninth embodiment,

[0073] Figure 24 shows a connecting rod according to the invention according to a tenth embodiment,

[0074] Figures 25 to 26shows a connecting rod according to the invention according to an eleventh embodiment,

[0075] Figure 27 shows a connecting rod according to the invention according to a twelfth embodiment,

[0076] Figure 28 shows a connecting rod according to the invention according to a thirteenth embodiment,

[0077] Figures 29 to 30 shows a connecting rod according to the invention according to a fourteenth embodiment,

[0078] Figure 31 shows a connecting rod according to the invention according to a fifteenth embodiment,

[0079] Figure 32 shows a connecting rod according to the invention according to a sixteenth embodiment, and

[0080] Figures 33 to 34 A connecting rod according to the invention is shown according to a seventeenth embodiment. DETAILED DESCRIPTION

[0081] In the following, several embodiments of a connecting rod 1 for transmitting force between a driven axis 102 and a mounting surface 105 of a door operator 101 will be described in detail. Identical or functionally identical components are provided with the same reference numerals.

[0082] Examples 1 to 3 and Figures 2 to 10 A variation is shown for disengaging the connecting rod 1 by the weight of the falling door operator 101. Figures 11 to 31 A variant for releasing the connecting rod in the region of the fixing device 8 by means of a heat-activatable triggering element 32 is shown. Figures 32 to 34 A variant for releasing the connecting rod at the hinge 2 by means of a thermally expanded triggering element 32 is shown.

[0083] Figure 1 For all embodiments, a device 100 is shown with a door operator 101 and a connecting rod 1. Figure 1 A door leaf 103 is shown, to which the door operator 101 is attached. The door leaf 103 is rotatably mounted in a door frame 104. The connecting rod 1 is mounted on the door frame 104, which forms a mounting surface 105, via its hinge 2 and a fastening device 8. A mounting axis 106 is defined vertically on this mounting surface 105.

[0084] like Figure 1 As shown in the figures of the various exemplary embodiments, the connecting rod 1 is constructed as follows:

[0085] Connecting rod 1 includes a hinge 2. Hinge 2, in turn, has a hinge frame 3. Hinge frame 3 has a hinge base 4. In particular, hinge base 4 is perpendicular to mounting axis 106. Furthermore, hinge frame 3 can have one or two hinge legs 5, which extend perpendicularly from hinge base 4. A hinge pin 7 is accommodated on at least one hinge leg 5, which defines a hinge axis 6. Hinge axis 6 is vertical and perpendicular to mounting axis 106.

[0086] The fixing device 8 is provided for connecting the hinge 2 , in particular the hinge bracket 3 , and the mounting surface 105 . In a simple embodiment, the fixing device 8 comprises at least one screw 9 , which is screwed firmly into the mounting surface 105 .

[0087] Furthermore, the connecting rod 1 comprises a lever arrangement 10 . The connecting rod 1 is designed here as a scissor linkage, so that the lever arrangement 10 comprises a first lever 15 and a second lever 19 . The two levers 15 , 19 are connected to each other in a rotationally movable manner via a ball joint 18 .

[0088] The first lever is connected to the connecting element 11 of the lever arrangement 10 via a rotary joint 12. The rotary joint 12 comprises one or more coaxial rotary joint pins 14, which define a rotary joint axis 13. The rotary joint axis 13 is in particular horizontal and therefore perpendicular and offset to the hinge axis 6.

[0089] In particular, the connecting element 11 has two parallel connecting plates, between which the first lever 15 is arranged. One or more rotary joint bolts 14 extend through the two connecting plates and the first lever 15 .

[0090] The first lever 15 preferably comprises a tensioning screw 16 which is located in a tensioning nut 17. By screwing the tensioning screw 16 into the tensioning nut 17, the length of the first lever 15 is adjustable.

[0091] The second lever 19 is connected in a rotationally fixed manner to the output axis 102 or the associated shaft of the door operator 101 , for example via the lever eye 20 shown.

[0092] exist Figure 1 In the embodiment, the door operator 101 is located on the door leaf 103 and the hinge 2 is correspondingly located on the door frame 104. The opposite arrangement is also possible, whereby the door operator 101 is fixed on the door frame 104 and the hinge 2 is fixed on the door leaf 103.

[0093] The door operator 101 is designed and arranged on its mounting surface so that it can be detached from its mounting surface, in the illustrated example, the door leaf 103, in the event of a fire and the attendant increase in temperature. For example, the door operator 101 can be detached by being pressed away from its mounting surface by a thermally expandable material, thereby causing the door operator 101 to fall.

[0094] The first embodiment and Figures 2 to 6 : The connecting rod 1 comprises a stop element 21 , which is configured as a stop sleeve 26 . The stop sleeve 26 is inserted onto the rotary joint 12 .

[0095] As especially Figure 4 As shown in the exploded view in FIG, the connecting element 11 has a first bolt receptacle 22. The first bolt receptacle 22 is U-shaped and open downwards.

[0096] The locking sleeve 26 has a second bolt receptacle 23. The second bolt receptacle is U-shaped and open laterally.

[0097] In the assembled state, the first lever 15 is inserted into the first bolt receptacle 22 via the rotary joint bolt 14. Inserting the locking sleeve 26 prevents the rotary joint bolt 14 from falling downwards.

[0098] Figure 5 The first and second embodiments are illustrated as follows: the first lever 15 includes an operating section 24 that projects beyond the rotary joint axis 13. When the first lever 15 is lowered due to the falling door operator 101, the operating section 24 is lifted.

[0099] In the first exemplary embodiment, the locking sleeve 26 is pushed aside by the raised actuating section 24 , so that the second bolt receptacle 23 is released from the rotary joint bolt 14 .

[0100] Figure 4 and Figure 5 The fixing element 25 is shown, which is designed as a projection and extends horizontally from the first lever 15. In the normal horizontal position of the first lever 15, the fixing element 25 blocks the movement of the stop sleeve 26. Figure 5 The movement of the locking sleeve 26 is released only after the first lever 15 is lowered.

[0101] Figure 6 Illustration: The fixing element 25 can also be designed as a plastic screw, for example, which connects the locking sleeve 26 to the connecting element 11. In this case, the screw is designed to be unstable so that it will be destroyed if the locking sleeve 26 is moved by the actuating section 24.

[0102] The second embodiment and Figures 7 to 9 In the second embodiment, the hinge 2 is disconnected, ie in particular the connecting element 11 is disconnected from the hinge bracket 3. Figure 7 and 8 In the embodiment, the locking element is formed as a locking connecting plate 27. The locking connecting plate 27 is inserted into the corresponding groove of the hinge bolt 7 through its U-shaped recess. Figure 7 and Figure 8In the variant shown, the locking plate 27 holds the hinge pin 7. When the locking plate 27 is removed by the actuating section 24, it is released from the hinge pin 7, allowing the hinge pin 7 to fall downwards together with the connecting element 11. For this purpose, it is provided in particular that the hinge bracket 3 has the hinge leg 5 only on the upper side.

[0103] The locking lug 27 preferably has a lug recess 28 into which the actuating section 24 can project.

[0104] As an alternative to the latching lug 27 , a latching cotter pin can also be used here, which is designed accordingly such that it can be pulled by the actuating section 24 .

[0105] Figure 9 A variation of the second embodiment is shown, in which the locking element 21 is designed as a set screw 29. The set screw 29 is screwed from above into the hinge pin 7 coaxially with the hinge axis 6 and, with its head and, if necessary, a washer, holds the hinge pin 7 relative to the upper hinge leg 5. Preferably, no hinge leg 5 is provided on the underside. The set screw 29 is relatively unstable, for example, made of plastic, so that when the first lever 15 is lowered, the actuating section 24 can lift the hinge leg 5, thereby destroying the set screw 29, for example by breaking off its head or pulling it out of its thread. This eliminates the need for locking the hinge pin 7 in the hinge bracket 3, allowing the connecting element 11 to fall downwards along with the hinge pin 7.

[0106] The third embodiment and Figure 10 : Figure 10 The sectional detail view shows the ball joint 18 that connects the two levers 15 and 19. The ball joint 18 is designed to be unstable, so that the weight of the falling door operator 101 causes the ball joint 18 and, therefore, the two levers 15 and 19 to become detached from one another. In particular, the two levers 15 and 19 each have a projection 30 that projects beyond the ball joint 18. These two projections 30, optionally with a vertical adjusting screw 31, come into contact when the door operator 101 is lowered, thereby promoting the disengagement of the ball joint 18.

[0107] The fourth embodiment and Figures 11 to 13 In the fourth and subsequent embodiments, the connecting rod 1 includes a hinge carrier 34 as a component of the fastening device 8. The hinge carrier 34 is securely connected to the mounting surface 105, for example, by screws 9. The hinge 2, in particular the hinge bracket 3, can be released from the hinge carrier 34 by means of at least one heat-activatable triggering element 32.

[0108] according to Figures 11 to 13, a blocking element 35 is provided, which is configured as a pivoting latch 36. The pivoting latch 36 is rotatably fixed on the hinge carrier 34 around a pivoting latch rotation axis 37. The pivoting latch rotation axis 37 is parallel to and offset from the hinge axis 6.

[0109] The pivot bolt 36 has a first leg 38 and a second leg 39. The pivot bolt rotation axis 37 is located between these two legs 38, 39.

[0110] On one side, the hinge bracket 3 , in particular the hinge base 4 , is pushed under the bracket 40 of the hinge carrier 34 . On the opposite side, the first leg 38 secures the hinge 2 to the hinge carrier 34 .

[0111] The rotation of the pivoting latch 36 is blocked by the triggering element 32, which is designed as a melting element 33 here. The melting element 33 is exposed in particular on the back side of the hinge carrier 34 and is in direct contact with the mounting surface 105. Therefore, in the installed state, the melting element 33 is clamped between the mounting surface 105 and the second leg 39. In order to prevent the melting element 33 from falling out before installation, it is preferably Figure 13 A latching connection 41 is provided between the melting element 33 and the hinge carrier 34 .

[0112] The fifth embodiment and Figure 14 :according to Figure 14 The blocking element 35 is also designed as a pivoting latch 36. However, in this case, the two legs 38, 39 are arranged so as to be pivoted 270° between the legs 38, 39. An intermediate piece 42 is located between the melting element 33 and the second leg 39. Here, too, the pivoting latch 36 can be rotated after the melting element 33 has melted, thereby releasing the hinge 2 from the hinge carrier 34.

[0113] The sixth embodiment and Figure 15 and 16 :According to Figure 15 and 16 In the view of FIG, the hinge carrier 34 is concealed for clarity. Two triggering elements 32, designed as ampoules 43, are located in the hinge carrier 34. The ampoules 43 are supported against the second lever 19 of the pivoting latch 36 via corresponding intermediate pieces 42. Upon thermal activation, which destroys the ampoules 43, the pivoting latch 36 can be rotated. To clamp the two ampoules 43 in the concealed hinge carrier 34, corresponding tensioning screws 44 are screwed into the hinge carrier 34.

[0114] The seventh embodiment and Figure 17 and 18In the seventh and following eighth embodiments, the blocking element 35 is configured as a linearly movable latch 45. In these variants, the hinge frame 3 is pushed below the bracket 40 on one side and is held by the blocking element 35 for the latch 45 on the opposite side.

[0115] exist Figure 17 and 18 In the embodiment, the triggering element 32 is designed as a thermal expansion element 46. When thermally activated, the volume of the thermal expansion element 46 increases. The element 46 is supported on the one hand against the hinge carrier 34 and on the other hand against the locking tongue 45, so that the locking tongue 45 can be moved linearly into its release position.

[0116] The eighth embodiment and Figure 19 and 20 Here, at least one compression spring 47 is provided, which is supported against the hinge carrier 34 and the locking tongue 45. In the normal state, the locking tongue 45 is loaded in its retaining position by the preloaded compression spring 47. However, the triggering element 32, which is designed as an ampoule 43, holds the locking tongue 45 in the retaining position against the force of the compression spring 47. After the ampoule 43 is destroyed, the force of the at least one compression spring 47 can move the locking tongue 45 into the released position.

[0117] In the following examples and Figures 21 to 27 , a different variant is shown in which a plurality of blocking elements 35 are used for the connection between the hinge 2 and the hinge carrier 34. In particular, in this case, the hinge carrier 34 is U-shaped and comprises two parallel legs, between which the hinge bracket 3 is inserted.

[0118] Ninth embodiment and Figures 21 to 23 Two blocking elements 35 are provided, each designed as follows: the blocking elements 35 include a bolt element 48. The bolt element 48 consists of two hollow elements inserted into one another and held at a certain distance by an internal ampoule 43. The hinge bracket 3 is pressed against the hinge support 34 via a tensioning element 49 inserted into a tensioning element groove 50 in the hinge support 34. The bolt element 48 with the ampoule 43 keeps the tensioning element 49 tensioned. After the ampoule 43 is broken, the prestressing force disappears, allowing the tensioning element 49 to be pushed out of the tensioning element groove 50 by the compression spring 47, thereby releasing the hinge bracket 3 from the hinge support 34.

[0119] Figure 22 Here, a design with a concealed blocking element 35 is shown. Figure 23 A section through the blocking element 35 is shown.

[0120] The tenth embodiment and Figure 24: Shown is a blocking element 35, which serves at multiple locations for the connection between the hinge frame 3 and the hinge carrier 34. Each blocking element 35 comprises a bolt element 48 having two elements inserted into one another, which are held at a certain distance by an internal ampoule 43. The two opposite ends of the bolt element 48 are inserted into corresponding recesses in the hinge carrier 34 and the hinge frame 3, respectively. The bolt element 48 and the associated ampoule 43 extend vertically. By breaking the ampoule 43, the two parts of the bolt element 48 can be moved toward each other, or the upper element can fall downward. This causes the hinge 2 to detach from the hinge carrier 34.

[0121] The eleventh embodiment and Figure 25 and 26 In this case, there is a device consisting of two scissor arms 51 in the hinge frame 3, in particular between the two hinge legs 5. The two scissor arms 51 are connected to each other at a scissor axis 52. In particular, the scissor axis 52 is fixed to the hinge base plate 4. Figure 26 The device is shown with the two scissor arms 51 in a separate position.

[0122] A blocking element 35 , designed as a bolt element 48 , is located on the scissor arm 51 , said blocking element being inserted into corresponding holes in the hinge carrier 34 and the hinge bracket 3 .

[0123] A compression spring 47 is provided which is preloaded and preloads the scissor arm 51 into a rotational movement about the scissor axis 52, so that the scissor arm 51 pulls the bolt element 48 out of its hole. However, this movement is blocked by the ampoule 43, so that the movement of the scissor arm 51 is blocked before the ampoule 43 is destroyed.

[0124] The twelfth embodiment and Figure 27 Here, a plurality of blocking elements 35 are provided, each having a bolt element 48. The bolt elements 48 are in turn inserted into corresponding holes in the hinge bracket 3 and the hinge carrier 34. A thermal expansion element 46 is provided as a triggering element 32 between the respective bolt element 48 and the hinge bracket 3. When thermally activated, the thermal expansion element 46 presses the bolt element 48 out of the corresponding hole.

[0125] A compression spring 47 is preferably provided in this case to hold the bolt element 48 in the retaining position, wherein the thermal expansion element 46 moves the bolt element 48 into the release position counter to the force of the compression spring 47 .

[0126] like Figure 27 As shown in the sectional view, two opposing blocking elements 35 can also be supported against one another by a common compression spring 47 .

[0127] The thirteenth embodiment and Figure 28 : Figure 28The sectional view shows the triggering element 32, which is designed as a melting element 33. The melting element 33 has a first recess 53. A second recess 54 is provided in the hinge frame 3, in particular in the hinge base 4. The two recesses 53, 54 are aligned, and the screws 9 of the fastening device 8 extend through these two recesses 53, 54.

[0128] The diameter of the first cutout 53 is small enough that the screw head rests on the melting element 33. The second cutout 54 is selected to be large enough that the screw head passes through the second cutout 54 after the melting element 33 is deformed. As a result, the hinge 3 can be released from the screw 9 after the melting element 33 is deformed.

[0129] As in Figure 28 As shown in the illustration in , the material of the melting element 33 preferably extends through the second recess 54 , so that direct contact for heat transfer is possible between the melting element 33 and the mounting surface 105 .

[0130] The fourteenth embodiment Figure 29 and 30 A bent retaining element 55 is provided. The retaining element 55 has a first, smaller cutout 53. A second, larger cutout 54 is provided on the hinge bracket 3. In the normal state, the screw head of the screw 9 rests on the retaining element 55. Only after the retaining element 55 has been moved, in this case perpendicularly to the mounting axis 106, is the retaining element 55 pulled out from under the screw head, allowing the hinge 3 to be released from the screw 9 again.

[0131] like Figure 29 and 30 As shown, the holding element 55 is bent so that it extends via one leg parallel to one of the hinge legs 5. Between the hinge leg 5 and the bent leg of the holding element 55, the triggering element 32 is arranged as a thermal expansion element 46. Upon thermal activation, the holding element 55 moves perpendicularly to the mounting axis 106.

[0132] An intermediate plate 56 made of a fusible material can be arranged between the hinge base 4 and the mounting surface 105 , so that upon thermal activation, the intermediate plate 56 deforms and thus reduces the preload of the screw 9 .

[0133] The fifteenth embodiment and Figure 31 : Figure 31An exploded view shows a plurality of triggering elements 32 in the form of plates serving as thermal expansion elements 46. These elements 46 are positioned between the hinge 3 and the mounting surface 105 and, when thermally activated, can press the hinge 3 away from the mounting surface 105. In a specific embodiment, a mounting bracket 57 is provided for this purpose. This mounting bracket 57 comprises a first mounting plate 58 and a second mounting plate 59. These two mounting plates 58, 59 are screwed together using desired breaking elements 60, such as screws. The first mounting plate 58 is securely connected to the mounting surface 105 via screws 9. The hinge 3 is securely fastened to the second mounting plate 59 via corresponding screws.

[0134] If there is a recess in the first mounting plate 58 for accommodating the triggering element 32, when the thermal expansion element 46 expands, it presses the second mounting plate 59 away from the mounting surface 105 or the first mounting plate 58, so that the desired breaking element 60 is destroyed or pulled out of its thread.

[0135] Such a mounting bracket or similar mounting brackets can also be used to connect the door operator 101 to its mounting surface in order to disconnect the door operator 101 in the event of a fire and the accompanying temperature increase.

[0136] The sixteenth embodiment Figure 32 : The hinge 3 is shown with only one upper hinge leg 5. The connecting element 11 is plugged onto the hinge pin 7. The connecting element 11 is protected from falling by a disk 61 and a locking element 21 designed as a locking cotter pin 62. The locking cotter pin 62 is plugged into the hinge pin 7.

[0137] The triggering element 32 in the form of a spring, here as a shape memory element 63, is tensioned between the locking pin 62 and the hinge carrier 34. When the shape memory element 63 is heated, it is tensioned and pulls the locking pin 62, thereby allowing the connecting element 11 to fall downwards.

[0138] The seventeenth embodiment and Figure 33 and 34 :Here as in Figure 32 As in the embodiment of the present invention, a locking cotter pin 62 is provided on the hinge bolt 7. By pulling the locking cotter pin 62, the connecting element 11 can be disengaged downwards.

[0139] The locking pin 62 can be pulled via a preloaded tension spring 64. However, the tensioning of the tension spring 64 is blocked by the trigger element 32 in the form of the ampoule 43. The tension spring 64 can only be tensioned after the ampoule 43 has been destroyed.

[0140] Figure 34 Show about Figure 33A variant of the embodiment in which the locking pin 62 can also be pulled by the compression spring 47. The compression spring 47 is preloaded here, wherein the relaxation of the compression spring is blocked by the ampoule 43. The ampoule 43 is supported here against the compression spring 47 and the hinge carrier 34.

[0141] Reference Signs List

[0142] 1 connecting rod

[0143] 2 hinges

[0144] 3 hinge frame

[0145] 4 hinged bottom plate

[0146] 5 hinged legs

[0147] 6 Hinge axis

[0148] 7 Hinge bolt

[0149] 8 Fixtures

[0150] 9 screws

[0151] 10 Lever device

[0152] 11 Connecting elements

[0153] 12 revolute joints

[0154] 13 Rotary joint axis

[0155] 14 Rotary joint bolt

[0156] 15First Lever

[0157] 16 tensioning screws

[0158] 17 tensioning nut

[0159] 18 ball joints

[0160] 19 Second Lever

[0161] 20 lever eyes

[0162] 21 stop element

[0163] 22 first bolt accommodating portion

[0164] 23 Second bolt accommodating portion

[0165] 24 operating sections

[0166] 25 fixing elements

[0167] 26 stop sleeve

[0168] 27 Stop connecting plate

[0169] 28 connecting plate blank

[0170] 29 stop screw

[0171] 30 protrusion

[0172] 31 Adjusting screw

[0173] 32 trigger elements

[0174] 33 melting elements

[0175] 34 hinge bearing parts

[0176] 35 blocking elements

[0177] 36 pivoting bolt

[0178] 37 Pivoting bolt rotation axis

[0179] 38 First Leg

[0180] 39 Second Leg

[0181] 40 brackets

[0182] 41 Locking connection

[0183] 42 Middleware

[0184] 43 ampoules

[0185] 44 tensioning screws

[0186] 45 lock tongue

[0187] 46 Thermal expansion element

[0188] 47 compression spring

[0189] 48 bolt components

[0190] 49 tensioning element

[0191] 50 tensioning element slots

[0192] 51 scissor arm

[0193] 52 scissor shaft

[0194] 53 first blank part

[0195] 54 Second blank space

[0196] 55 holding element

[0197] 56 middle plate

[0198] 57 mounting bracket

[0199] 58 first mounting plate

[0200] 59 second mounting plate

[0201] 60 expected fracture elements

[0202] 61 plates

[0203] 62 stop cotter pin

[0204] 63 Shape memory element

[0205] 64 tension spring

[0206] 100 devices

[0207] 101 Door Operator

[0208] 102 driven axis

[0209] 103 Door

[0210] 104 door frame

[0211] 105 mounting surface

[0212] 106 Installation axis

Claims

1. A connecting rod (1) for transmitting force between a driven axis (102) and a mounting surface (105) of a door operator (101), comprising - hinge (2), - a fixing device (8) configured to fix the hinge (2) to the mounting surface (105), wherein a mounting axis (106) is defined perpendicular to the mounting surface (105), and a lever device (10) which is rotatably fastened to the hinge (2) about a hinge axis (6) perpendicular to the mounting axis (106) and is designed for a rotationally fixed connection to an output axis (102) of the door operator (101), - wherein the connecting rod (1) is configured to be released by the weight of the door operator (101) falling in the event of a fire, and / or wherein the connecting rod (1) comprises a heat-activatable trigger element (32) configured to release the connecting rod (1) in the event of heat activation triggered by a fire, The lever device (10) comprises a first lever (15), a rotary joint (12) and a connecting element (11), wherein the connecting element (11) is rotatably fixed to the hinge (2), and the first lever (15) is rotatably connected to the connecting element (11) via the rotary joint (12), wherein the rotary joint axis (13) is perpendicular to the hinge axis (6).

2. A linkage according to claim 1, wherein the joint (12, 18) in the hinge (2) or the lever arrangement (10) is configured to be disengaged by the weight of a falling door operator (101).

3. A connecting rod according to claim 1, wherein a stop element (21) is provided on the rotary joint (12) or hinge (2) for holding the rotary joint (12) or hinge (2) together, and wherein the stop element (21) can be moved to a position in which the rotary joint (12) or hinge (2) is not held together by lowering the first lever (15).

4. A connecting rod according to claim 3, wherein the first lever (15) includes an operating section (24) protruding from the axis of the rotary joint (13) toward the hinge (2), and the operating section moves upward when the first lever (15) is lowered, thereby moving the stop element (21) into a position where it is not held together.

5. The connecting rod according to claim 3 or 4, wherein the stopping element (21) is a stopping sleeve (26) sleeved on the rotary joint (12).

6. A connecting rod according to claim 5, wherein the rotary joint (12) has a rotary joint bolt (14) and a U-shaped, downwardly open first bolt receptacle (22) on the connecting element (11) and / or the first lever (15), wherein the stop sleeve (26) holds the rotary joint bolt (14) in the first bolt receptacle (22) via a U-shaped, laterally open second bolt receptacle (23), and wherein the stop sleeve (26) is removable to disengage the rotary joint (12) from the rotary joint bolt (14).

7. The connecting rod according to claim 4, wherein the hinge (2) comprises a hinge pin (7), wherein the hinge pin (7) is protected from falling out by a stop element (21).

8. The connecting rod according to claim 7, wherein the hinge (2) comprises a hinge leg (5) only on the upper side of the connecting element (11), in which the hinge pin (7) is accommodated.

9. The connecting rod according to claim 7 or 8, wherein the locking element (21) is removable from the hinge pin (7).

10. The connecting rod according to claim 7 or 8, wherein the locking element (21) can be broken by a movement of the actuating section (24).

11. A connecting rod according to any one of claims 2 to 4, wherein the lever arrangement (10) comprises a first lever (15) and a second lever (19), wherein the two levers (15, 19) are connected to each other via a spherical joint (18), and wherein the spherical joint (18) is configured to be disengaged by the weight of a falling door operator (101).

12. The connecting rod according to any one of claims 1 to 4, wherein the fixing device (8) comprises a heat-activatable trigger element (32), which is designed to release the fixation between the hinge (2) and the mounting surface (105) when thermally activated.

13. The connecting rod according to claim 12, wherein the fixing device (8) comprises a hinge carrier (34) fixable on the mounting surface (105) and at least one blocking element (35), wherein the blocking element (35) is movable from a holding position into a release position, wherein the blocking element (35) holds the hinge (2) on the hinge carrier in the holding position and releases the hinge (2) in the release position, and wherein the trigger element (32) releases the movement of the blocking element (35) into the release position upon thermal activation and / or the trigger element (32) moves the blocking element (35) into the release position upon thermal activation.

14. The connecting rod according to claim 13, wherein the hinge (2) is pushed under the bracket (40) of the hinge carrier (34) on one side and is held on the opposite side by the blocking element (35).

15. The connecting rod according to claim 14, wherein the blocking element (35) is designed as a rotatably mounted pivoting latch (36).

16. Linkage according to claim 15, wherein the pivoting bolt (36) comprises two legs (38, 39), wherein one leg (38) holds the hinge (2) and the trigger element (32) acts on the other leg (39) in order to block the rotational movement of the pivoting bolt (36).

17. The connecting rod according to claim 15 or 16, wherein the triggering element (32) emerges at the rear side of the hinge carrier (34) facing the mounting surface (105).

18. A connecting rod according to claim 14, wherein the blocking element (35) is configured as a linearly movable locking tongue (45), wherein the trigger element (32) moves the locking tongue (45) into the release position when thermally activated, or wherein the trigger element (32) releases the spring-loaded locking tongue (45) to move into the release position when thermally activated.

19. The connecting rod according to claim 13, comprising a plurality of said blocking elements (35) to hold said hinge (2) on said hinge carrier (34).

20. The connecting rod according to claim 19, wherein the blocking element (35) is designed as a pin.

21. A connecting rod according to claim 12, wherein the trigger element (32) is configured as a melting element (33), wherein the melting element (33) has a first recess (53) for a fixing element, wherein the hinge (2) has a second recess (54) aligned with the first recess (53), wherein the diameter of the second recess (54) is larger than the diameter of the first recess (53), so that after the melting element (33) melts, the head of the fixing element passes through the second recess (54).

22. A connecting rod according to claim 12, wherein the trigger element (32) is composed of a thermally expandable material (46) and is configured to move a retaining element (55) upon thermal activation, wherein the retaining element (55) has a first recess (53) for a fixing element, wherein the hinge (2) has a second recess (54) aligned with the first recess (53), wherein the diameter of the second recess (54) is larger than the diameter of the first recess (53), so that after the retaining element (55) is moved, the head of the fixing element passes through the second recess (54).

23. The connecting rod of claim 12, wherein the trigger element (32) is constructed of a thermally expandable material (46) and is positioned to be disposed between the hinge (2) and the mounting surface (105) so as to press the hinge (2) away from the mounting surface (105) when thermally activated.

24. The connecting rod according to any one of claims 1 to 4, wherein the hinge (2) comprises a thermally activatable trigger element (32), which is designed to disengage the hinge (2) upon thermal activation.

25. A connecting rod according to claim 24, wherein the lever device (10) is protected from falling off the hinge bolt (7) by a stop element (21), wherein the heat-activatable trigger element (32) is configured to remove the stop element (21) or release the spring force for removing the stop element (21) when heat activated.

26. The connecting rod according to claim 1, wherein the fixing device is configured to fix the hinge (2) to a door, a frame or a wall.

27. The connecting rod according to claim 3 or 7, wherein the stop element (21) is a stop sleeve (26), a stop connecting plate (27), a stop cotter pin or a stop screw (29).

28. The connecting rod according to claim 9, wherein the stop element (21) is configured as a stop connecting plate or a stop cotter pin.

29. The connecting rod according to claim 10, wherein the stop element (21) is designed as a stop screw (29).

30. Connecting rod according to claim 13, wherein the fixing device (8) comprises a hinge carrier (34) screwable on the mounting surface (105) and at least one blocking element (35).

31. The connecting rod according to claim 15, wherein the blocking element-pivoting bolt rotation axis (37) is parallel to the hinge axis (6).

32. The connecting rod according to claim 17, wherein the triggering element (32) is fastened to the hinge carrier (34) by means of a locking connection (41).

33. The connecting rod according to claim 18, wherein the trigger element (32) presses the locking tongue (45) into the release position when thermally activated.

34. Connecting rod according to claim 20, wherein the blocking element (35) is movable parallel to the hinge axis (6) into its release position.

35. Connecting rod according to claim 21 or 22, wherein the fixing element is a screw (9).

36. The connecting rod of claim 23, wherein the trigger element (32) is positioned to be disposed in a mounting bracket.

37. A device (100) comprising a connecting rod (1) according to any one of the above claims and a door operator (101), wherein the lever device (10) is fixed to the driven axis (102) of the door operator (101), and wherein the door operator (101) is configured to fall from its mounting surface upon thermal activation triggered by a fire situation.

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