EP3004504B1 - Door closer for a wing of a door or window - Google Patents

Description

The invention relates to a collection device for a wing of a door or a window according to the preamble of claim 1. US-A-4847946 discloses a retraction device with freewheeling function according to the features of this preamble.

From the DE 195 24 779 A1 is a door closer with a switchable freewheel function known. In a filled with a hydraulic fluid housing, a piston is slidably disposed against a spring. The piston is connected via a toothing and a pinion via a lever arrangement with a wing of a door. The spring which is supported on the piston is at the other end supported on a separating piston which is likewise displaceable in the housing and which is hydraulically switchable. Thereby, the spring can be kept in a tensioned state between the piston and the separating piston, whereby a freewheel for the wing of the door can be effected.

The arrangement is complex, and it is a hydraulic switching device required. An automatic collection of the freely movable wing near the closed position of the wing in the closed position is not provided.

From the DE 34 33 891 A1 a locking device for a door closer is known, wherein a cam gear of the door closer can be blocked by designed as balls locking members are applied to a cross-sectional widening of a displaceable hollow cylinder by the inclined surface of a cone part and supported against the inner surface of the hollow cylinder outwardly.

There is only a determination of the door closer in an open position of the wing of the door, the determination is complicated and costly switched by an electromagnet.

The DE 10 2009 000 539 A1 discloses a door closer with a housing and with a guided in the housing, a piston rod having pistons.

Furthermore, a spring is arranged in the housing, which is acted upon when opening the wing and is designed for automatic closing of the wing. It is provided a locking device for detecting the piston in the working cylinder, with an axial blocking possibility of the piston via locking means of the locking device. To determine the piston in the closing direction, a holding pin arranged on the piston rod is supported on the housing with the locking device activated via a detent rocker against the force of the spring.

There is a time-consuming and costly locking the spring of the door closer by switching an electromagnet. A retraction of the wing in the closed position is not possible with detected spring.

The invention has for its object to provide a collection device for a wing of a door or a window, wherein the wing is largely free to move, but also safely guided in its closed position.

The object is solved by the features of claim 1.

The subclaims form advantageous embodiments of the invention.

The collection device is provided for a hinged door or a window, the wing is mounted in hinges on a frame. The collection device may be constructed so that the wing over a wide range is freely movable, as if no device is disposed on the door. In the area near the closed position of the wing of the wing is actively drawn into this closed position. The retraction movement is additionally damped to avoid a sharp slamming of the wing. Furthermore, a position to open position for the wing is provided, wherein the wing is pulled close to this open position position by the collection device into this.

The collection device has a spring formed as energy storage, which attracts the wing near the closed position. To move freely the To enable wing, at least one freewheel device is provided, which makes it possible to decouple the wing from the energy storage. Similar to a manual door closer, the wing of the door is operatively connected via a linkage with a shaft having at least one driver which cooperates with equipment or a toothing of a displaceably arranged in the collection device piston. The operative connection between the shaft and the piston is detachable and forms the freewheel device, whereby the shaft can be uncoupled from or coupled to the piston acted on by the spring. Advantageously, the coupling is only at small opening angles of the wing of the door, so that the wing is freely movable at larger opening angles. When the wing is returned close to the closed position, the coupling between the piston acted upon by the spring and the shaft is restored. The tensioned in the initial opening movement spring releases the energy stored in it again, and the wing is guided into its closed position.

Furthermore, in the opening direction, following the area in which the wing is freely movable, there is again a coupling of the piston with the shaft in an open position of the wing so that the wing is raised to this open position, in which the wing is fixed. Advantageously, thus a striking of the wing to a wall or the like is avoided when the wing is thrown violently, for example.

In the following, exemplary embodiments are explained in more detail in the drawing with reference to FIGS.

• Fig. 1 einen Ausschnitt eines Flügels einer Tür mit zugehörigem Rahmen und mit einem Teilschnitt der Einbausituation einer integrierten Einzugsvorrichtung;
• Fig. 2 ein erstes Ausführungsbeispiel der Einzugsvorrichtung mit einer Freilaufeinrichtung im Schnitt;
• Fig. 3 ein zweites Ausführungsbeispiel der Einzugsvorrichtung mit einer Freilaufeinrichtung im Schnitt in der Ausgangsstellung bei geschlossenem Flügel;
• Fig. 4 die Einzugsvorrichtung gemäß Fig. 3 in einer Stellung bei etwas geöffnetem Flügel zu Beginn des Freilaufs;
• Fig. 5 die Einzugsvorrichtung gemäß Fig. 4, jedoch bei weiter geöffnetem Flügel im Bereich der Übergabe des Freilaufs;
• Fig. 6 die Einzugsvorrichtung gemäß Fig. 4 in einer Stellung bei noch weiter geöffnetem Flügel zu Beginn des Einzugs in eine Offenstellung;
• Fig. 7 ein drittes Ausführungsbeispiel einer Einzugsvorrichtung, mit einem Ritzelzahn;
• Fig. 8 ein weiteres Ausführungsbeispiel der Einzugsvorrichtung mit einem erweiterten Freilaufbereich in der Ausgangsstellung;
• Fig. 9 eine weitere Ansicht der Einzugsvorrichtung gemäß Fig. 8 zu Beginn der Übergabe des Freilaufbereichs;
• Fig. 10a-c eine nicht anspruchsgemässe Einzugsvorrichtung in drei Öffnungszuständen einer Türe;
• Fig. 11 eine Darstellung der Türbewegung der Einzugsvorrichtung von Fig. 10;
• Fig. 12a-d eine nicht anspruchsgemässe Einzugsvorrichtung in vier verschiedenen Türöffnungsstellungen;
• Fig. 13 eine Darstellung der Türbewegung der Einzugsvorrichtung von Fig. 12;
• Fig. 14a-h noch ein weiteres Ausführungsbeispiel der Einzugsvorrichtung in verschiedenen Öffnungsstellungen einer Tür;
• Fig. 15 eine Darstellung der Türbewegung des Ausführungsbeispiels von Fig. 14;
• Fig. 16a-b eine Ausschnittsvergrößerung des Ausführungsbeispiels von Fig. 14 mit eingezeichneten Winkeln zur Bestimmung der Ritzelgestaltung;
• Fig. 17a-b eine Darstellung entsprechend Fig. 16 für ein Ausführungsbeispiel mit zwei Mitnehmern und zwei gegenüberliegenden Zähnen am Kolben;
• Fig. 18 eine Darstellung der Türbewegung bei einem Ausführungsbeispiel der Einzugsvorrichtung mit gegenüberliegenden Anlagen oder Verzahnungen an Kolben.

Showing:

• Fig. 1 a detail of a wing of a door with associated frame and a partial section of the installation situation of an integrated collection device;
• Fig. 2 a first embodiment of the collection device with a freewheel device in section;
• Fig. 3 a second embodiment of the collection device with a freewheel device in section in the starting position with the wing closed;
• Fig. 4 the collection device according to Fig. 3 in a position with a slightly open wing at the beginning of the freewheel;
• Fig. 5 the collection device according to Fig. 4 , but with the wing still open in the area of the transfer of the freewheel;
• Fig. 6 the collection device according to Fig. 4 in a position with still open wing at the beginning of the collection in an open position;
• Fig. 7 a third embodiment of a collection device, with a pinion tooth;
• Fig. 8 a further embodiment of the collection device with an extended freewheel area in the starting position;
• Fig. 9 a further view of the collection device according to Fig. 8 at the beginning of the transfer of the freewheel area;
• Fig. 10a-c a non-claimed feeding device in three opening states of a door;
• Fig. 11 an illustration of the door movement of the collection device of Fig. 10 ;
• Fig. 12a-d a non-compliant collection device in four different door open positions;
• Fig. 13 an illustration of the door movement of the collection device of Fig. 12 ;
• Fig. 14a-h Yet another embodiment of the collection device in different open positions of a door;
• Fig. 15 a representation of the door movement of the embodiment of Fig. 14 ;
• Fig. 16a-b an enlarged detail of the embodiment of Fig. 14 with indicated angles for determining the pinion design;
• Fig. 17a-b a representation accordingly Fig. 16 for an embodiment with two drivers and two opposing teeth on the piston;
• Fig. 18 an illustration of the door movement in one embodiment of the collection device with opposing systems or teeth on the piston.

In the Fig.1 an intake device 3 integrated in a wing 1 of a door for the pivotally hinged wing 1 together with an associated frame 2 is shown.

In the frame 2, a slide rail 4 is installed, in which a slider 5 is guided. The slider 5 is rotatably disposed at one end of an actuating arm 6, wherein the other end of the actuating arm 6 is rotatably connected to a shaft 8 of the feeder device 3. The collection device 3 can also be integrated in the frame 2 and the slide rail 4 in the wing 1. It is also possible on the wing 1 or the frame 2 resting arrangement of the collection device 3 and der Gleitschiene 4th

In the Fig. 2 the collection device 3 is shown, which has a filled with a hydraulic fluid housing 7, in which the shaft 8 is rotatably mounted, which passes through a in a receiving space 9 in the housing 7 slidably guided, recessed in its interior piston 10. The piston 10 has along its extension inside each opposite stops 22, 23 and equipment 28, 29. At the end, the receiving space 9 of the housing 7 can be sealingly closed on one or both sides with a closure lid 14.

A pinion 15 of the shaft 8 cooperates with the stops 22, 23 and the equipment 28, 29 of the piston 10 to its displacement, wherein the term pinion 15 here is not to understand the shaft 8 surrounding gear in the conventional sense. Rather, the pinion 15 is reduced to two adjacently arranged drivers 16, 17, which correspond to teeth with particularly wide head surfaces. Between the dogs 16, 17, as in a conventional pinion, a tooth gap 26 is formed.

On the piston 10, a spring 18 acts as an energy storage, wherein the spring 18 by means of a freewheel device, which is formed by a freewheeling region 19, with respect to the shaft 8 and thus on the wing 1 ineffective adjustable. The freewheel area 19 is formed by the top surfaces of the drivers 16, 17. The spring 18 may, as shown here, be supported in the receiving space 9 at the end on the housing 7 or alternatively on a spring-side closure lid 14. On the opposite side of the spring 18 of the piston 10, a damping chamber 20 is formed in the receiving space 9 by the sealingly guided in the receiving chamber 9 piston 10, wherein in the piston 10 frontally to the damping chamber 20, a valve assembly 21 is arranged, which movement of the piston 10 in Opening direction allows unhindered. In the closing direction, the valve device 21 causes a damping of the movement of the piston 10. Alternatively or additionally, one or more overflow channels can be arranged in the housing 7, in which externally accessible, adjustable valves for influencing the behavior of the collection device can be arranged.

It is in the Fig. 2 shown that the first driver 16 rotates in an opening movement of the blade 1 with the shaft 8 in the counterclockwise direction, whereby the first driver 16, the piston 10 moves by contact with the system 28 in the direction of the spring 18 out. During the further opening movement of the wing 1, the first driver 16 slides on the system 28, whereby the first driver 16 slides into the freewheeling region 19, whereby the shaft 8 is decoupled from the piston 10 and thus from the spring 18, since no further displacement of the piston 10 takes place in the direction of the spring 18. The wing 1 is thus freely movable, as if no collection device 3 is present. In another Installation arrangement of the intake device 3, the second driver 17 in conjunction with the system 29 is effective.

On the basis of in the Fig. 3 to 6 shown second embodiment, which relates to an improved embodiment of the collection device 3, the function and operation will be described in detail. According to the second embodiment, the piston 10 along its extension in each case on each opposite toothings 11, wherein each toothing 11 has at least one tooth 12, 13. The pinion 15 of the shaft 8 acts together with the teeth 11 of the piston 10 to its displacement by one of the teeth 12, 13 engages in the tooth gap 26 formed between the drivers 16, 17. In the in Fig. 3 Starting position of the retracting device 3 shown with the wing closed 1, the lower tooth 12 is in engagement with the tooth gap 26 between the drivers 16, 17. Starting from this starting position of the collection device 3 with the wing 1 closed, the shaft 8 is rotated when opening the wing 1 in the counterclockwise direction whereby the first driver 16 cooperates with the first tooth 12 and displaces the piston 10 in the direction of the spring 18. In the Fig. 4 the piston 10 is displaced so far that the first tooth 12 slides on the first driver 16 in the freewheel region 19 and slides along it, whereby the shaft 8 is decoupled from the piston 10 and thus from the spring 18, since no further displacement of the piston 10 takes place in the direction of the spring 18. The wing 1 is thus freely movable, as if no collection device 3 is arranged.

In the in Fig. 5 shown position of the shaft 8 at a further open wing 1, the second tooth 13 passes into the freewheel region 19 of the second driver 17, wherein the first tooth 12 is still in the freewheel region 19 of the first driver 16. This results in a transfer of the freewheel, in which the wing 1 is freely movable, from the first to the second driver.

If the wing 1 is opened even further, there is a transition of the second tooth 13 into engagement with the tooth gap 26 between the drivers 16, 17, whereby the shaft 8 is again coupled to the piston 10, as shown in the Fig. 6 is shown. By acted upon by the force of the tensioned spring 18 in the direction of the pressure chamber 20 piston 10, the second tooth 13 rotates the second driver 17 and thus the shaft 8 in the counterclockwise direction, with the spring 18 relaxes. The wing 1 is thereby raised, whereby a mounting of the hitherto freely movable wing 1 is effected in an open position in which the wing 1 is held. The mounting of the wing 1 in the open position is attenuated by the valve assembly 21 or optionally additionally arranged valves.

On the piston 10, the stops 22, 23 are further formed, with which the respective associated driver 16, 17 cooperate. If the freely movable wing 1 is thrown violently in the direction of the open position, then the driver 16, 17 already comes into contact with the stop 22, 23, before the tooth 12, 13 is completely received in the tooth space 26 between the drivers 16, 17. In the Fig. 6 is shown that the driver 17 abuts against the stop 23, wherein the tooth 13 just from the freewheel region 19 slides into the tooth gap 26 inside. The displacement movement of the piston 10, which takes place by the abutment of the driver 16, 17 on the stop 22, 23, is damped by the valve assembly 21, whereby the movement of the wing 1 is attenuated.

In the closing direction of the wing 1, the process takes place in the reverse order. Starting from the wound open position of the wing 1 according to Fig. 6 in which the wing 1 is held, the wing 1 is moved in the closing direction. The shaft 8 is thereby rotated clockwise, whereby the second tooth 13 by its contact with the second driver 17, the piston 10 moves against the spring 18, whereby the spring 18 is stretched again. The second tooth 13 slides in the following on the second driver 17 in the freewheel region 19, whereby the wing 1 is decoupled from the spring 18 again. In a further movement of the wing 1 in the closing direction is again in the Fig. 5 shown transfer of the freewheel, now from the second driver 17 to the first driver 16 by the first tooth 12 passes into the freewheel region 19 of the first driver 16 before the second tooth 13 leaves the freewheeling region of the second driver 17.

In the return of the wing 1 close to the closed position, the coupling between the shaft 8 and piston 10 is restored by the first tooth 12 leaves the freewheel region 19 on the first driver 16 by the rotation of the shaft 8 in a clockwise direction and the tooth gap 26 engages, whereby the first tooth 12 is in engagement with the first driver 16. By acting with the force of the tensioned spring 18 in the direction of the damping chamber 20 piston 10, the first tooth 12 now rotates the first driver 16 and thus the shaft 8 in a clockwise direction, wherein the spring 18 relaxes and in the Fig. 3 shown position is reached again. The wing 1 is actively drawn into its closed position, wherein the indentation is due to the valve assembly 21 or due to alternatively or additionally provided in overflow in the housing 7 provided valves attenuated.

Due to the symmetrical construction of the piston 10 of the intake device 3 with respect to the toothing 11, the collection device 3 can be arranged unchanged on both left and right hinged doors or alternatively on or in the frame 2. In the closed position of the wing 1 is in a reverse arrangement then the second tooth 13 in the tooth gap 26 between the drivers 16, 17 and the first tooth 12 is in the open position of the wing engaged between the drivers 16, 17th

Furthermore, a piston 10 with only one-sided toothing 11 is conceivable which causes only a damped intake of the wing 1. The drivers 16, 17 may then be formed coincidentally as a circular circumferential, wherein the circular shape is interrupted only by the tooth gap 26.

In the Fig. 7 a third embodiment is shown, wherein a pinion tooth 27 between the two drivers 16, 17 is arranged. This results in two tooth gaps 26, wherein the tooth gap 26 between the first driver 16 and the pinion gear 27 cooperates with the first tooth 12. The second tooth 13 cooperates correspondingly with the tooth gap 26, which is arranged between the pinion tooth 27 and the second driver 17. As a result, advantageously, a larger area with respect to the opening angle of the wing 1 is possible.

In the FIGS. 8 and 9 a further embodiment of the feeder devices 3 is shown cut in an oblique view, wherein advantageously a free design of the freewheeling region 19 is possible. The pinion 15 is in this case designed so that the freewheel region 19 is extended in each case with respect to the circumference of the pinion 15, so that in each case a shoulder 24, 25 is formed, in which the associated stop 22, 23 can engage. The stops 22, 23 are compared to the first embodiment formed here in the manner of narrow teeth, so that they can engage in the stepped portion of the shoulders 24, 25 on the pinion 15 and according to the first embodiment with the drivers 16, 17 cooperate. Advantageously, an improved transfer of the freewheel of the blade 1 from the first tooth 12 to the second tooth 13 is achieved by the extended freewheel region 19, as in the Fig. 9 is shown. In this case, the transitions are made gentler, since the freewheeling region 19 is formed as freewheeling contour and is formed with respect to the acquiring tooth 12, 13 each variable radially increasing.

This in Fig. 10 Unclaimed embodiment shown is similar in construction as the embodiment of Fig. 7 However, the piston 10 is provided only on one side with two teeth 12. The pinion 15 accordingly has two tooth spaces 26 which are formed between a pinion tooth 27 and two drivers 16, 17. The drivers 16, 17 are brought together here in the circumferential direction, so that the pinion 15 has an uninterrupted circular cross-section except for the area of the tooth spaces 26.

Furthermore, a piston 10 with only one-sided toothing 11 is conceivable which causes only a damped intake of the wing 1. The drivers 16, 17 may then be formed coincidentally as a circular circumferential, wherein the circular shape is interrupted only by the tooth gap 26.

Fig. 10a shows the collection device with the door closed. The spring is biased and is further tensioned when opening the door according to arrow 30. The position of the intake device at a door opening angle of about 30 ° is in Fig. 10b shown. The shaft 8 with the pinion 15 is rotated as far as the arrow 31 in the counterclockwise direction until the freewheel area 19 forming radial sliding surface of the pinion 8 on the by the in Fig. 10b left tooth 12 formed bearing surface of the piston 10 rests. From this rotational position, the shaft 8 is decoupled from the piston 10, so that the door can be freely opened further without loading by the spring 18. This free movement of the door is in Fig. 10c shown. It can be seen that the piston 10 is not moved during rotation of the shaft 8 according to arrow 31. Accordingly, the spring 18 is not further compressed. When closing the door, the shaft 8 is turned back against arrow 31 and finally coupled via the tooth spaces 26 and the teeth 12 again with the piston 10, whereby the door is drawn by relieving the spring 18.

Fig. 11 shows the door movement according to the embodiment of Fig. 10 in a schematic representation. The double arrow 32 marks the freewheel area of the wing 1 and arrow 33 the coupled area with a door opening angle of> about 30 °, in which the door is pulled under the action of the spring 18. As in the previously described examples, attenuation by means of a corresponding valve arrangement and / or overflow channels preferably takes place. The dashed representation of the door panel 1 corresponds to the moment of coupling or decoupling of the pinion 15 with the piston 10th

This in Fig. 12 not claimed embodiment corresponds largely to the embodiment of Fig. 10 , However, instead of two teeth, the piston 10 has four teeth 12 on one side. Accordingly, the pinion 15 is provided with four tooth gaps 26 which are formed between corresponding pinion teeth 27 and two drivers 16, 17. Again, the drivers 16, 17 in the circumferential direction of the pinion, so that a continuous circular section-shaped area of the pinion 15 results in cross-section.

Fig. 12a again shows the state with the door closed and biased spring 18th Fig. 12b shows a state with a slightly open door. The pinion 15 has been rotated counterclockwise in accordance with arrow 31, whereby the piston 10 in Fig. 12b moved to the right and the spring 18 has stretched further. Pinion 15 and piston 10 are still coupled.

In Fig. 12c in turn, the state is shown in which a decoupling of the pinion 15 from the piston 10 takes place. The door is here opened about 90 °, the spring 18 further compressed. The radial sliding surface of the pinion 15 forming the freewheeling region 19 rests on the contact surface of the piston 10 formed by the very left-hand tooth 12. Upon further opening the door, the pinion 15 turns as in Fig. 12d shown without moving the piston 10 and thus without further compression of the spring 18. The door is in free-running. When closing the door, the shaft 8 is again rotated in the reverse direction until the pinion 15 is again coupled to the piston 10, whereby the door is tightened under the pressure of the spring 18 attenuated.

In Fig. 13 is again the door movement of the embodiment of Fig. 12 shown schematically. The freewheeling area is indicated by the double arrow 32 and the coupled closing area by the arrow 33. The dashed illustrated wing 1 indicates the position of the door when coupling or decoupling, which is present at a door opening of about 90 °. The opening angle of the door, at which this takes place, can be varied over the number of teeth 12 of the piston 10 and the pinion teeth 27.

In Fig. 14 an embodiment is shown which corresponds to that of Fig. 12 is similar. However, the piston 10 is here symmetrically provided at the bottom with three teeth 12 and at the top with three teeth 13 which cooperate with corresponding tooth spaces 26 of the pinion 15. The different door positions are in the FIGS. 14a to 14h shown, where Fig. 14a the state with the door closed and biased spring 18 shows. The FIGS. 14b to 14d show the opening of the door with rotation of the shaft 8 and increasing tensioning of the spring 18 until just before the decoupling, which then in Fig. 14e is shown. This decoupling takes place at a door opening angle of about 75 °. The trained as a tooth cam 16 has a radial sliding surface 34 which runs onto the formed by the lower left tooth 12 contact surface of the piston 10. Upon further rotation of the piston 10 is therefore not moved further to the right, the spring is not stretched.

If the pinion 15 is further rotated according to arrow 31, is transferred from the sliding surface 34 of the first driver 16 to the sliding surface 35 of the second driver 17, as in FIG. 14f is shown. The piston 10 is therefore not further moved to the right, the spring 18 is not stretched.

Only when still further rotating the pinion 15 according to arrow 31 is then again a coupling between the pinion 15 and piston 10 on the upper teeth 13. This is done as in Fig. 14g shown at a door opening angle of about 85 °. Now, the biased spring 18 can deliver their stored energy and press the door by turning the shaft 8 in the direction of arrow 31. At about 170 °, the pinion 15, as in Fig. 14h shown again be decoupled from the piston 10, whereby the door is again in the freewheel.

The closing of the door is then again in the opposite direction, wherein the spring 18 is tensioned by coupling the pinion 15 in the upper teeth 13 and moving the piston 10 to the right again. This is followed by a freewheel area according to the FIGS. 14e and 14f and a coupling accordingly Fig. 14d and finally pushing the door under the action of the then relaxing spring 8 according to the FIGS. 14c to 14a in the opposite direction and preferably with simultaneous damping. The mounting of the door is preferably under damping.

Fig. 15 again shows schematically the door opening movement. Due to the symmetrical design of the piston, the wing 1 is pulled up under the force of the spring 18 both according to arrow 36 and closed according to arrow 37. In between there is a small freewheel area indicated by arrow 32, which is located between the two dashed wing positions in which pinion 15 and piston 10 are respectively decoupled and coupled. The opening angle at which the coupling or the decoupling takes place can again be adjusted via the number of piston teeth 12, 13 and pinion teeth 27. Due to the symmetrical design, the system is direction independent in this embodiment.

The determination of the pinion geometry with respect to the piston toothing is in the Figures 16 and 17 illustrated for two embodiments. The angle a is formed from the center of rotation of the shaft 8 to the contact surfaces on the piston 10. Angle b shows the angular width of the freewheeling area and forms from the contact surface on the piston 10 to the end of the radial sliding surfaces 34 and 35 of the pinion 15 in positioning Start of the freewheel area. Angle c is formed from the intermediate region of the radial sliding surfaces 34, 35 of the pinion 15. The larger c, the smaller is the freewheeling area 19. Angle d is formed from the maximum extent of the radial sliding surfaces 34, 35 of the pinion 15, and angle e is formed from the starting points of the two radial sliding surfaces 34, 35 of the pinion 15. For the clean transfer of the radial sliding surfaces 34, 35 of the pinion 15 on the contact surfaces of the piston 10 from one to the other side of the piston must d> a and e <a.

Fig. 18 shows the door movement schematically in an embodiment according to the FIGS. 2 to 7 , The dashed representations of the wing 1 indicate the opening angle of the door when coupling or decoupling the pinion 15 from the piston 10. The double arrow 32 indicates the freewheeling area between these two coupling points, while arrow 36 denotes the mounting of the wing and arrow 37, the pressing of the wing.

List of reference characters

1

wing

2

frame

3

retraction device

4

slide

5

skid

6

actuating arm

7

casing

8th

wave

9

accommodation space

10

piston

11

gearing

12

tooth

13

tooth

14

cap

15

pinion

16

takeaway

17

takeaway

18

feather

19

Freewheel area

20

damping space

21

valve assembly

22

attack

23

attack

24

paragraph

25

paragraph

26

gap

27

pinion

28

investment

29

investment

30

arrow

31

arrow

32

double arrow

33

arrow

34

radial sliding surface

35

radial sliding surface

36

arrow

37

arrow

Claims (9)

1. Retracting device (3) for a leaf/sash (1) of a door or of a window, having a housing (7), having a piston (10) which is arranged in a receiving space (9) of the housing (7) and is loaded by a spring (18), and having a shaft (8) which is mounted in the housing (7) and which interacts with the piston (10), wherein an actuating arm (6) for the leaf/sash (1) is arranged on the shaft (8) in a rotationally fixed manner,
   wherein at least one driver (16, 17) in the form of a tooth with a wide head surface is arranged on the shaft (8) and interacts with a toothing (11) or stop (22, 23) provided on the piston (10) or with an abutment (28, 29) provided on the piston (10) for displacing the latter, and the head surface of which forms a freewheeling device with a freewheeling region (19, 34, 35) in that the abutment (28, 29) of the piston (10) or a tooth (12, 13) of the toothing (11) of the piston (10) slides along the freewheeling region (19, 34, 35) during a rotation of the shaft (8) without further displacing the piston (10) in the direction of the spring (18), and thereby decouples the shaft (8) from the piston (10),
   characterized
   in that the piston (10) is designed as a hollow piston and has two mutually opposite abutments (28, 29) or toothings (11) on its inner side, wherein the first toothing (11) is assigned at least one first tooth (12) and the second toothing (11) is assigned at least one second tooth (13), and wherein a first driver (16) is arranged on the shaft (8) and a second driver (17) is arranged on the shaft (8) at a distance from the first driver (16) in the circumferential direction of the shaft (8), and wherein the first abutment (28) or the first tooth (12) in the freewheeling region (19, 34, 35) on the first driver (16) and the second abutment (29) or the second tooth (13) in the freewheeling region (19, 34, 35) on the second driver (17) transfers the freewheeling motion of the leaf/sash (1) in which the leaf/sash (1) is freely movable.
2. Retracting device according to Claim 1, characterized in that the driver (16, 17), when in contact with the abutment (28, 29) or a tooth (12, 13) of the toothing (11), couples the shaft (8) to the piston (10).
3. Retracting device according to Claim 1, characterized in that the mutually opposite abutments (28, 29) or toothings (11) are formed symmetrically to one another.
4. Retracting device according to Claim 1, characterized in that at least one pinion tooth (27) is arranged between the first driver (16) and the second driver (17), wherein tooth gaps (26) are formed between adjacent pinion teeth (27) and between the drivers (16, 17) and the respectively adjacent pinion tooth (27).
5. Retracting device according to one of Claims 1 to 4,
   characterized in that, when engaged with the first driver (16) or when engaged in a tooth gap (26) of the shaft (8), the first abutment (28) or the first toothing (11) of the piston (10) loaded by the spring (18) rotates the shaft (8) and guides the leaf/sash (1) into a closed position, and/or in that, when engaged with the second driver (17) or when engaged in a tooth gap (26) of the shaft (8), the second abutment (29) or the second toothing (11) of the piston (10) loaded by the spring (18) rotates the shaft (8) and guides the leaf/sash (1) into an open position.
6. Retracting device according to one of the preceding claims,
   characterized in that at least one stop (22, 23) with which the driver (16, 17) comes into contact is arranged on the piston (10).
7. Retracting device according to Claim 6,
   characterized in that the stop (22, 23) engages in an offset region of a shoulder (24, 25) on the pinion (15).
8. Retracting device according to Claim 6 or 7,
   characterized in that the stop (22, 23) is designed in the manner of a narrow tooth on the piston (10).
9. Retracting device according to one of the preceding claims,
   characterized in that the freewheeling region (19) is designed as a variable contour.

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