EP1847672A2 - Joint assembly for actuating a flap, in particular a smoke exhaust flap - Google Patents

Abstract

A smoke and heat release roof hatch (1) has a spring-operated lever arm pushrod (7) mechanism that pivots (Po) the hatch (1) to open over a turret outlet (15). The pushrod is attached to a supporting lever (10) that swings thru a second pivot axis (P3). The two pivot points (Po, P3) are spaced apart. One end of a supplementary lever (11) is attached to the pushrod (7). One end of a tensile spring (14) is attached (17) to the turret (15) at a point that is further from the first pivot point (Po) than the drive (7) swivel axis (P2). The other end of the spring (14) is attached to the lower part (9) of the pushrod (7).

Description

The invention relates to a joint arrangement for actuating a flap, in particular a smoke outlet flap or dome, according to the preamble of claim 1.

In such a known joint arrangement for actuating a smoke outlet flap according to FR 2 671 821 A1 the linear drive element is arranged centrally under a movable truss part, which is pivotable together with the flue outlet flap. The linear drive element in the form of a cylinder essentially serves to actuate a locking of the flue outlet flap at a location remote from the first axis of rotation thereof and for this purpose communicates with the latch via a spindle or rod. A second end of the linear drive element is articulated to a movable truss part or its associated flap via a first rod, which can be regarded as a lever. Furthermore, the second end of the linear drive member via a second rod, which can be regarded as a support lever, hingedly connected to a lower portion of a fixed essay or Aufsatzkranzes on which is rotatably mounted above the ventilation frame of the flue outlet flap. Two opening mechanisms are symmetrical to the vertical center plane in which the linear drive element is arranged is, at a great distance to this arranged on both parallel inner sides of the curb. They engage with one end approximately in the middle of the longitudinal extent of the sides of the attachment to this. Each of the two opening mechanisms comprises a hydropneumatic spring and a tension spring made of metal, which are arranged in mutually parallel vertical planes. The attachment point of the attachment opposite end of the hydropneumatic spring is connected to the movable ventilation frame, so that it is approximately horizontal in the closed position of the frame. The attachment point opposite end of the metallic tension spring is lowered in contrast in this position of the ventilation frame and is connected via a one-sided articulated linkage with the movable ventilation frame in combination. The two opening mechanisms are intended to provide substantially the actuating force for opening the smoke vent, while the central actuator, which comprises an actuating cylinder or linear actuator, is intended to provide the force required for closing and to assist in opening only Overload reliably effect. The effect of the opening mechanisms is triggered by the unlocking means of the central drive element. When opening the action of the hydropneumatic springs is supported by the tension springs due to the leverage of the linkage, via which they communicate with the movable ventilation frame. Before the ventilation frame reaches its end position, its opening movement can be damped by the tension springs. When closing the smoke outlet flap or the movable ventilation frame by the linear drive element, the hydropneumatic springs are stretched again. This known hinge assembly is complicated because of the various lever systems provided on the one hand on the linear drive member and on the other hand on the opening mechanisms. The arrangement of the two Opening mechanisms, each comprising the metallic tension spring and hydropneumatic spring, on the opposite sides of the interior of the tower are bulky and may cause the introduction of twisting forces into the ventilation frame when the smoke flaps are actuated.

Otherwise, completely self-actuated joint arrangements of RWA devices are known, which accomplish opening and closing a flap over a large pivoting range with only one linear drive element. For this purpose, in such a known joint arrangement with a linear drive element at its first pivot axis except a support lever, an additional lever with a first end pivotally mounted. The second end of the reversing lever pivotally engages an upper truss part of the flap at a distance from its axis of rotation and to the attachment point of the first end of the drive element ( EP 0 443 050 A2 ). In such an arrangement, even in extreme situations, such as when the door is frosted, the linear drive member alone must apply the opening force. On the other hand, the flap can beat violently in an end position at very wide opening under the action of gravity. Also, the closing of the flue flap can be done near the end position undesirably violent.

This inadequacy also has another hinge arrangement for actuating a flap, in particular flue flap, with only one central linear drive element, in which not only the support lever, but also the lever at a distance to an end portion of the drive element, in which they are pivotally mounted, respectively a stationary axis of rotation or pivot axis are pivotable ( EP 0 971 091 B1 ). Since these axes can be short, reaction forces of the linear drive element become Initially initiated via the reversing lever and the support lever only in fixed pivot points of the reversing lever and the support lever. Traverse parts are therefore not essential.

The present invention has for its object to provide an uncomplicated, compact hinge assembly, which avoids the disadvantages of the above known hinge assemblies, in particular, the flap and the movable ventilation frame twisting forces are minimized even if to assist the opening and to damp the opening movement is provided in the end position and closing at least one tension spring in addition to the linear drive element.

This object is achieved for a joint assembly with the features specified in claim 1.

The solution according to the invention thus consists in a unique integration of the at least one tension spring in the hinge assembly with the linear drive element, wherein the hinge assembly substantially the pivotable at a lower portion of the linear drive member about a first pivot axis support lever and also hinged to the lower portion additional lever includes, and wherein the support lever is connected to a lower attachment portion of the attachment and the bell crank over it may also be connected to the attachment or instead with the movable flap.

In particular, the hinge assembly according to the characterizing part of claim 1 is characterized in that the second end of the tension spring is connected to a lower portion of the linear drive member which includes the first pivot axis about which the linear drive element is pivotable. In this case, the first end of the tension spring is firmly connected to a spring connection point with the attachment, which is farther away from the first axis of rotation of the flap than the first pivot axis of the linear drive element.

In this arrangement, the tension spring is the power transmission of the tension spring on the flap and the essay on the same support lever and the same lever, which are provided for the linear drive element. It thus eliminates additional levers for the tension spring. This standardization has been found to be functionally useful, although the spring force need not be in the same direction on the support lever and on the bell crank as the force induced by the linear drive member.

Since the spring force is introduced into the same places in the flap or its frame, as the force of the linear drive element, and since the application of force for the linear drive element and the tension spring is also the same on the essay, are in the flap and the associated Ventilation frame introduced virtually no torsional forces.

From this connection of the tension spring with the linear drive element starting the opening system comprising the linear drive element and the tension spring can be further optimized by the vertical plane in which the tension spring is located near the vertical center plane in which the drive element is located. Thus, the entire opening system is very compact.

Advantageously, the second end of the tension spring is attached to the first pivot axis of the linear drive element. Here, the load of a housing of the drive element is minimized by forces and moments.

The hinge assembly according to the invention can be used universally, e.g. in conjunction with a flap which has no inserted into a movable ventilation frame, thus also movable truss part and which also in the fixed essay or essay wreath over which the flap is pivotable, no lower, with the essay firmly connected truss part.

A compact unit for installation in an essay or curb, which also includes the tension spring, however, can be advantageously prepared according to claim 3 using a stationary truss part which is mounted in the essay and above which after assembly, the flap is rotated about the first axis of rotation can be. In this embodiment, the assembly with the stationary cross member and the linear drive element, the tension spring is integrated in the opening system with the Traversenteilen. This reduces the on-site assembly work.

The unit is particularly compact in that the stationary cross member is dimensioned narrower than the attachment in which it is mounted, wherein the tension spring is disposed within the stationary cross member.

Furthermore, according to claim 5, a second, movable truss part can be rotatably connected to the first, stationary truss part about the first axis of rotation, whereby the degree of integration is further increased and the on-site assembly work is minimized. In this case, the pivotable connection point of the linear drive element remote from the first rotation axis is arranged for the flap on the movable cross member to which the flap is attached. The hinge arrangement according to claim 5 has the features that above the stationary truss part a movable together with the flap truss part is rotatable, on which the remote from the first axis of rotation pivotal connection point of the linear drive element is arranged, that the first end of the reversing lever to the first Pivot axis of the linear drive element is pivotable, wherein a second end of the reversing lever is pivotally mounted on the movable truss part at a distance from the first axis of rotation and to the pivotal connection point of the linear drive element. In this joint arrangement, the single linear drive element, the flap on the movable truss part can be pivoted beyond a normal opening position 120 ° out into an alarm position in which the opening angle can be 165 °.

As mentioned above, particularly in the case of the above joint arrangement, the second end of the tension spring is advantageously attached to the first pivot axis of the linear drive element. Otherwise, the second end of the tension spring is in any case arranged as close as possible to the first pivot axis of the linear drive element.

But it is also possible to integrate the tension spring in an embodiment of the joint arrangement which is designed so that it does not initiate any additional transverse forces on the flap on which the linear drive element engages, so that a traverse or a truss bottom is not required , which allows a lightweight material-saving design. This embodiment is characterized according to claim 6, characterized in that a second end of the reversing lever, whose first end is pivotable about a third pivot axis on the linear drive element, on a fixed pivot point is mounted, such that the first pivot axis of the linear drive element on the support lever and the third pivot axis about which the lever is pivotable on the linear drive element, upon actuation of the linear drive element describe circular trajectories that intersect and a resulting rotation of the cause linear drive element.

Particularly in the latter embodiment, the second end of the tension spring for transmitting power to the support lever and the bellcrank according to claim 7 may be attached to the lower portion of the linear drive member including the first pivot axis on the support lever and the third pivot axis on the bellcrank.

A reliable, structurally simple attachment of the second end of the tension spring to the linear drive element is achieved according to claim 8 with a bolt-shaped projection which projects laterally from the linear drive element and on which engages the second end of the tension spring. The bolt-shaped projection can be designed to be screwed into the linear drive element.

In the case where the second end of the tension spring is to be attached to the first pivot axis of the linear drive element, the bolt-shaped projection extends in extension of the first pivot axis away from the linear drive element, i. the bolt-shaped projection and the first pivot axis are concentric.

In order to increase the reliability of the hinge assembly and to exert on the linear drive element no lateral tilting force that might try to swing out the drive element from the vertical plane, are preferably arranged according to claim 10, two tension springs on both sides of the linear drive element symmetrically to this and attached thereto.

In the case where the hinge assembly is mounted on a fixed truss member comprising two struts parallel to each other and to the vertical median plane of the linear drive member, the two tension springs are arranged compactly between the two struts so as to be the vertical plane of the linear strut Include drive element.

In the embodiment of the joint assembly with a stationary truss member is arranged on this particularly advantageous according to claim 12, a support, in the closed position of the flap between the first end and the second end of the tension spring, so that the tension spring in this position of the flap on the Pad rests and is angled from this to the first pivot axis of the linear drive element, which is located in the closed position of the flap below the second stationary truss part. This ensures that the spring force acts at an angle to the linear drive element, under which the tension spring in the first opening phase of the flap supports the opening particularly effective. This may be necessary or desirable in particular when the flap is frozen.

In any case, according to claim 1 3, the second end of the tension spring can be protected and aesthetically pleasing in the closed position of the flap within the essay, which also includes the linear drive element, the support lever and the lever.

Figur 1

ein erstes Ausführungsbeispiel einer Gelenkanordnung zur Betätigung einer Kuppel in einer Rauch- und Wärmeabzugsanlage (RWA-Anlage) in geschlossener Stellung der Kuppel in einem Längsschnitt durch eine vertikale Mittelebene der Gelenkanordnung, wobei die Gelenkanordnung an einem ersten oberen beweglichen Traversenteil angreift, das mit der Kuppel in Verbindung steht, sowie an einem unteren ortsfesten Traversenteil angreift, welches in einem Aufsatzkranz befestigt ist,

Figur 2

die Gelenkanordnung in der gleichen Ansicht wie in Figur 1, jedoch in voll geöffneter Stellung der Kuppel,

Figur 3

eine Draufsicht auf den Öffnungsbeschlag gemäß den Figuren.1 und 2, der mit dem unteren ortsfesten Traversenteil und dem oberen beweglichen Traversenteil gebildet ist, mit einem Aufsatzkranz, in dem das untere ortsfeste Traversenteil befestigt ist, und einem Lüfterrahmen, der an dem oberen beweglichen Traversenteil angebracht ist,

Figur 4

eine detailliertere Draufsicht auf einen Ausschnitt des Öffnungsbeschlags gemäß Figur 3,

Figur 5

eine Draufsicht auf Anbringungsstellen von Zugfedern an dem unteren ortsfesten Traversenteil in einem Ausschnitt,

Figur 6

einen Längsschnitt durch eine zweite Ausführungsform der Gelenkanordnung zur Betätigung einer Klappe, ebenfalls in einem Schnitt in einer vertikalen Mittelebene der Gelenkanordnung bei geschlossener Stellung der Klappe und

Figur 7

die zweite Ausführungsform gemäß Figur 6, jedoch in voll geöffneter Stellung der Klappe.

The invention is explained below with reference to second embodiments, which are shown in the drawing with seven figures, from which further concretions of the features of the invention may result. Show it:

FIG. 1

a first embodiment of a hinge assembly for actuating a dome in a smoke and heat exhaust system (RWA system) in the closed position of the dome in a longitudinal section through a vertical median plane of the hinge assembly, wherein the hinge assembly engages a first upper movable truss member, which engages with the dome in contact, as well as acts on a lower stationary truss part, which is mounted in a curb,

FIG. 2

the joint arrangement in the same view as in Figure 1, but in the fully open position of the dome,

FIG. 3

a plan view of the opening fitting according to Figures 1 and 2, which is formed with the lower stationary truss part and the upper movable truss part, with a curb in which the lower stationary truss part is fixed, and a fan frame, which at the upper movable truss part is appropriate,

FIG. 4

a more detailed plan view of a section of the opening fitting of Figure 3,

FIG. 5

a plan view of mounting locations of tension springs on the lower stationary truss part in a section,

FIG. 6

a longitudinal section through a second embodiment of the hinge assembly for actuating a flap, also in a section in a vertical median plane of the hinge assembly in the closed position of the flap and

FIG. 7

the second embodiment according to Figure 6, but in the fully open position of the flap.

The joint arrangement according to FIGS. 1-4 or 5 serves to actuate a dome 1, which together with a movable truss part 2 is rotatable about a first axis of rotation (P ₀ ). The movable truss part 2 is, as Figure 3 shows, mounted centrally in a movable fan frame 4, which in turn carries the dome 1.

In the closed position of the fan frame 3 shown in Figures 1 and 3, the movable truss part is located on a lower, fixed truss part 4, which comprises two fixedly connected struts 4 ', 4 ", which are arranged symmetrically to the vertical center plane, not shown. A support bracket 5 extends vertically downwards from the left-hand side of the stationary truss part 4 in Figures 1 to 4. The movable truss part has a less high bracket in this area, which is designated 6 in Figures 1 and 4.

To open and close the dome is only a linear drive element 7, which actuates a rod 8. The linear drive element can be realized as an electric motor or as a pneumatic or hydraulic cylinder. With the single linear drive element, in the embodiment according to FIGS. 1-5, the dome can be rotated in a very wide range of rotation, which can extend over approximately 165 °.

To rotate the dome 1 with the fan frame 3 via the upper movable truss part 2, the rod 8 is hinged on the first axis of rotation P ₀ opposite side to the movable truss part 2, namely at the pivotal connection point P _1st

A lower portion of the linear drive element 7 is mounted on a first pivot axis P ₂ , which is not stationary, see. Figures 1 and 2, and on which engages one end of a support lever 9, whose opposite end is mounted on a second pivot axis P ₃ below in the support bracket 5.

An additional reversing lever 11 is on the one hand also connected to the first pivot axis P ₂ on the linear drive element and on the other hand mounted in a rotation axis P ₄ , which is arranged on the bracket 6 of the upper movable truss part 2 near the first axis of rotation P ₀ . The axis of rotation P ₄ is in any case closer to the first axis of rotation P ₀ than the center of the upper part of the cross member.

The first axis of rotation P ₀ , the first and second pivot axis P ₂ , P ₃ and the axis of rotation P ₄ form a four-bar or together with the first pivotal joint P ₁ a five-bar joint, which said large opening angle in an alarm position of the dome with the single active linear drive element 7 allows.

A locking device 12 at the end of the rod 8, at the pivotal connection point P ₁ can be unlocked by an initial movement of the linear drive member to a pivoting of the upper movable truss part 2 with the dome 1 to allow, but it has no further influence on the dome motion.

For pivoting the movable truss part 2 and the dome 1, the linear drive element is based on the support lever 10 on the first pivot axis P ₂ , which can not dodge down clockwise because of the reversing lever 11. Therefore, with the first pivot axis P _2, the elements connected to it are pivoted in the counterclockwise direction, in particular in the wide open position shown in FIG.

In particular, the initial opening under heavy load of the linear drive element, e.g. by snow load or frozen dome to facilitate and on the other hand, the dome in the wide open position not accelerated by the weight of their end position to beat, in the described hinge assembly two tension springs 13, 14 integrated in planes parallel to the vertical center plane and between the upper movable truss part 2 and the struts 4 ', 4 "of the lower stationary truss part 4 are arranged, see in particular Figures 3 and 4.

In each case a first end of each of the tension springs 13, 14 is connected to a spring attachment point 16, 17, which may be realized by a profile piece, each with one of the struts 4 ', 4 "of the stationary truss part 4, see Figures 1, 2 and 3. The spring attachment point is farther from the first axis of rotation P ₀ than the first pivot axis P ₂ on the linear drive element, which can be seen in particular in the closed position of the dome of FIG.

The respective second end of the tension spring 13 and 14 is attached to the first pivot axis P _{2 of} the linear drive element, which in the closed position of the flap between the spring mounting point 16 and 17 and the first axis of rotation Po, and the second pivot axis P ₃ and the P ₄ axis of rotation is located.

In order to improve the angle of attack of the second end of each of the tension springs 13, 14 from above on the linear drive element 7 in the closed position of the dome, ie to make it steeper, is on the struts 4 ', 4 "of the stationary truss part 4 depending on a support 18, 19 mounted from a profile piece so that one of the tension springs, approximately in their middle, on the support in the closed position of the dome, whereby each spring, starting from its approximately horizontal portion at the spring mounting point 16 and 17 from the support 18 and 19 is angled downward to the second spring end, which is in communication with the first pivot axis P _2. As a result, the second end of the tension spring 13 or 14 so sharply engages the lower portion 9 of the linear drive element that the spring is effectively trying lifting or lifting the linear drive member when the latch 12 is released at the start of the flap lift-up Use the springs 13, 14 opening the dome until the first pivot axis P ₂ on the linear drive element has reached about the position P ' ₂ in Figure 1, ie in the particularly critical initial phase of the opening.

In contrast, when the dome is moved in the vicinity of the wide open end position, see Figure 2, the tension springs 13, 14 try to retract the linear drive member 7, wherein the tension springs 13, 14 extend approximately in extension of the linear drive member 7, and damp the opening movement the dome 1 effective. In the latter Area is then also the closing movement of the dome supported by the tension springs 13, 14 when the rod 8 is retracted by the linear drive element 7.

It can be seen in particular from FIG. 5 how the supports 18, 19 mounted on the struts 4 ', 4 "protrude laterally from the struts into their intermediate space and are designed so that the tension springs 13, 14 arranged in the intermediate space, see FIG , on the pads 18, 19 can rest safely.

In Figure 4, the attachment of the second end of each of the springs 13, 14 is shown in each case on one of the bolt-shaped projections 20, 21, which are arranged coaxially to the first pivot axis P ₂ and can form outer portions of this pivot axis. The bolt-shaped projections 20, 21 protrude transversely from the linear drive element 7. Furthermore, from Figure 4, the arrangement of the support lever 10 and the reversing lever 11, which are designed as U-profiles, symmetrically to the vertical center plane, not shown, can be seen.

A particular advantage of the joint arrangement is that the two tension springs 13, 14 act on the same first pivot axis P ₂ on the linear drive element 7 as the support lever 10 and the lever 11, so that the tensile forces of the two tension springs 13, 14 without additional levers - Or transmission elements are introduced with great effect in the joint assembly.

From Figures 3 and 4 further details of the compact arrangement of the two tension springs 13, 14, which can be integrated into a lower stationary truss part of conventional dimensions and substantially located within the opening fitting formed with the linear drive element, the support lever and the lever and the crosspiece parts.

The recognizable in Figures 1 - 4 attachment 1 5 is used to integrate the hinge assembly with the dome in a building. However, at least it has no further essential function for the joint arrangement, if this comprises the lower stationary truss part 4. Otherwise, in other embodiments, the article, if it is sufficiently stiff, take over the function of the lower stationary truss part.

The second embodiment according to FIGS. 6 and 7 will be discussed below as a further example of the universal applicability of the special spring arrangement in joint arrangements of RWA systems.

The names of the axles of the second embodiment are the same as those of the first embodiment.

The second embodiment differs from the first embodiment discussed above, inter alia, in that in the second embodiment, no lower stationary truss member and no upper movable truss member are provided. In the second embodiment, no additional transverse forces are introduced to a flap 22 on which a linear drive element 23 acts. Only forces are introduced into the flap 22 at the first axis of rotation P ₀ and at the pivotable connection point P _{1 of} the linear drive element 23 on the flap 22. This also applies to the derived from the tensile force of the tension spring 24 force components.

Incidentally, a locking element 25 is also provided in the second embodiment at the opposite end to the first axis of rotation P _{0 of} the flap 22, to which a rod 26 of the linear drive element 23 engages, which is designed here as Doppelhubzylinder. The end of the rod 26 is arranged at the pivotable connection point P ₁ . The locking element cooperates with a console, which is fixedly mounted inside an attachment 28, so that upon actuation of the rod 26 is unlocked.

At the opposite side to the pivotable connection point P ₁ in the vicinity of the first axis of rotation P ₀ , a further bracket 29 is fastened to the inside of the attachment and can protrude approximately vertically downwards. The additional bracket 29 serves not only for supporting a support lever 30 pivotally mounted on a first pivot axis P _{2 of} the linear drive element but also for an additional reversing lever 31 on a stationary rotation axis P ₄ '. The stationary axis of rotation P ₄ 'of the reversing lever is closer to the stationary first axis of rotation P _{0 of} the flap than the second stationary pivot axis P _{3 of} the support lever. The second pivot axis P ₃ and the fixed axis of rotation P ₄ 'may be arranged along a vertical line. The reversing lever 31 is articulated about a third movable pivot axis P ₅ on the linear drive element 23, in its lower portion 32, which includes the third pivot axis P ₅ and the first pivot axis P ₂ . The first pivot axis P ₂ and the third pivot axis P ₅ are preferably located in a central axis 23a of the linear drive element 23.

The tension spring 24, the first end of which is attached to a first spring attachment point 33 on the bracket 27, which can be considered as a locking console, engages a second spring attachment point on the lower portion 32 of the linear drive member 33, between the first pivot axis P _{2 of} the linear drive member and the third pivot axis P _{5 of} the linear drive element. The spring thus runs with the flap closed, as shown in FIG. 6, below the linear drive element 23.

Upon actuation of the linear drive member 23 unlocks the locking member 25 and the flap 22 is supported by the tension spring 24, opened with great force. Reaction forces of the spring and the linear drive element 23 are transmitted via the support lever 30 and the lever 31 on the bracket 29 on the attachment 28.

When the flap 22 approaches the wide open end position shown in FIG. 7, the movement of the flap 22 is slowed down by the tension spring 24. In this position, the tension spring exerts on the closing of the flap supporting force on this.

The second embodiment according to Figures 6 and 7 is characterized by straightforward structure including the tension spring.

LIST OF REFERENCE NUMBERS

1

dome

2

Upper movable truss part

3

fan frame

4

lower fixed truss part

4 ', 4 "

pursuit

5

support bracket

6

console

7

linear drive element

8th

pole

9

section

10

support lever

11

Umlenkhebel

12

locking device

13

mainspring

14

mainspring

15

essay

16

Spring attachment point (profile piece)

17

Spring attachment point (profile piece)

18

edition

19

edition

20

approach

21

approach

22

flap

23

linear drive element

23a

central axis

24

mainspring

25

locking element

26

pole

27

console

28

essay

29

another console

30

support lever

31

Umlenkhebel

32

lower section

33

first spring attachment point

34

second spring attachment point

P ₀

first axis of rotation

P ₁

swiveling joint

P ₂

first pivot axis (of the linear drive element)

P ₃

second pivot axis

P ₄

Rotary axis of the reversing lever

P ₄ '

fixed axis of rotation (second version)

P ₅

third pivot axis

Claims (13)

A joint arrangement for actuating a flap (22), in particular a smoke outlet flap or dome (1), which is pivotable about a stationary, first axis of rotation (P ₀ ) from a closed position to an open position over a fixed attachment (15, 28) and back, with a linear drive element (7, 23), one end of which is connected to the flap (22) at a pivotable connection point (P ₁ ) remote from the first axis of rotation (P ₀ ) and which, on the other hand, is about a first pivot axis (P ₂ ) pivotally mounted on a support lever (10, 30) which is pivotable about a fixed, second pivot axis (P ₃ ) at a distance to, in particular approximately below the first axis of rotation (P ₀ ) of the flap (22), wherein at least one additional Deflection lever (11, 31) with a first end pivotally on the linear drive element (7, 23) remote from the pivotal connection point (P ₁ ) engages, wherein at least one tension spring (13, 14, 24) in a plane e is arranged, which runs parallel to a vertical center plane, in which the drive element (7, 23) is located, wherein a first end of the tension spring (13, 14, 24) with the attachment (15, 28) at a spring attachment point (16, 17, 33) is in fixed connection, which is farther from the first axis of rotation (P ₀ ) of the flap (22) than the first pivot axis (P ₂ ) of the linear drive element (7, 23) and wherein a second end of the tension spring ( 13, 14, 24) is in communication with the flap (22),
characterized,
in that the second end of the tension spring (13, 14, 24) is connected to a lower portion (9, 32) of the linear drive element (7, 23) which encloses the first pivot axis (P ₂ ). Joint arrangement according to claim 1,
characterized,
in that the second end of the tension spring is attached to the first pivot axis (P ₂ ) of the linear drive element (7, 23). Joint arrangement according to claim 1 or 2,
characterized,
that in the attachment (15) a stationary cross member (4) is mounted, above which the flap (22) about the first axis of rotation (P ₀ ) is rotatable, and
in that the first end of the tension spring (13, 14) is connected to the stationary truss part (4) at the spring attachment point (16, 17). Joint arrangement according to claim 3,
characterized,
that the stationary cross member (4) is narrower than the attachment (15). Joint arrangement according to claim 3 or 4,
characterized,
that to the fixed cross-member (4) together with the flap (22) movable cross-member (2) is rotatable, on which from the first rotation axis (P ₀₎ removed, pivotal connection point (P ₁₎ of the linear drive element is arranged,
in that the first end of the reversing lever (11) is pivotable about the first pivot axis (P ₅ ) of the linear drive element (7) and that a second end of the reversing lever (11) is pivotable on the movable cross member (2) at a distance from the first axis of rotation (P ₀ ) and to the pivotal connection point (P ₁ ) of the linear drive element (7) is arranged. Joint arrangement according to claim 1,
characterized,
in that the first end of the reversing lever (31) is pivotable about a third pivot axis (P ₅ ) on the linear drive element (23), that a second end of the reversing lever (31) is mounted on a fixed axis of rotation (P ₄ ) the first pivot axis (P ₂ ) of the linear drive element on the support lever (30) and the third pivot axis (P ₅ ) about which the deflection lever (31) is pivotable on the linear drive element (23) upon actuation of the linear drive element (23) describe circular trajectories that intersect and cause a resultant rotation of the linear drive member. Joint arrangement according to claim 6,
characterized,
in that the lower portion (9, 32) of the linear drive element (7, 23), to which the second end of the tension spring (24) is attached, includes the first pivot axis (P ₂ ) and the third pivot axis (P ₅ ). Joint arrangement according to one of claims 1 to 7,
characterized,
in that the second end of the tension spring (13, 14) is connected to a bolt-shaped projection (20, 21) which projects laterally from the linear drive element (7). Joint arrangement according to claim 8,
characterized,
in that the bolt-shaped projection (20, 21) and the first pivot axis (P ₂ ) are concentric. Joint arrangement according to one of claims 2 - 9,
characterized,
in that two tension springs (13, 14) are arranged symmetrically on both sides of the linear drive element (7). Joint arrangement according to claim 10 and at least one of claims 2 and 3,
characterized,
that the two tension springs (13, 14) between two mutually parallel struts (4 ', 4 ") of the fixed crosshead part (4) are arranged. Joint arrangement according to one of claims 3 - 11,
characterized,
in that at least one support (18, 19) is arranged on the stationary cross member (4), in the closed position of the flap (22) between the first end and the second end of the tension spring (13, 14), such that the tension spring in this position, the flap rests on the support (18, 19) and from which the tension spring to the first pivot axis (P ₂ ) of the linear drive element (7) angled is, which is in the closed position of the flap (22) below the second, stationary truss part (4). Joint arrangement according to one of the preceding claims,
characterized,
that in the closed position of the flap (22), the linear drive element (7, 23), the support lever (10, 30), the lever (11, 31) and the second end of the tension spring (13, 14, 24) within the essay are located.

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