EP0328917B1 - Door closer - Google Patents

Door closer Download PDF

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Publication number
EP0328917B1
EP0328917B1 EP89101415A EP89101415A EP0328917B1 EP 0328917 B1 EP0328917 B1 EP 0328917B1 EP 89101415 A EP89101415 A EP 89101415A EP 89101415 A EP89101415 A EP 89101415A EP 0328917 B1 EP0328917 B1 EP 0328917B1
Authority
EP
European Patent Office
Prior art keywords
door
valve
closure member
overflow valve
movement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89101415A
Other languages
German (de)
French (fr)
Other versions
EP0328917A1 (en
Inventor
Gerhard SCHRÖDER
Dieter Mauckner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gretsch Unitas GmbH Baubeschlaege
Original Assignee
Gretsch Unitas GmbH Baubeschlaege
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP0328917A1 publication Critical patent/EP0328917A1/en
Application granted granted Critical
Publication of EP0328917B1 publication Critical patent/EP0328917B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
    • E05F3/12—Special devices controlling the circulation of the liquid, e.g. valve arrangement
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
    • E05F3/10—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes with a spring, other than a torsion spring, and a piston, the axes of which are the same or lie in the same direction
    • E05F3/102—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes with a spring, other than a torsion spring, and a piston, the axes of which are the same or lie in the same direction with rack-and-pinion transmission between driving shaft and piston within the closer housing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/218—Holders
    • E05Y2201/22—Locks
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/252—Type of friction
    • E05Y2201/254—Fluid or viscous friction
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
    • E05Y2201/499—Spring tensioners; Tension sensors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Type of wing
    • E05Y2900/132—Doors

Definitions

  • the invention relates to a door closer of the type described in the preamble of claim 1.
  • Such door closers are known in various designs both as floor door closers and as top door closers. As a rule, they are filled with a hydraulic fluid that flows from one cylinder chamber to the other when the damping piston is moved. If the damping piston moves in the opposite direction, the flow also takes place in the opposite direction.
  • a floor door closer the door is firmly connected to the rotary link, while in the case of an overhead door closer, a linkage is coupled to the rotary link, which connects the door closer attached to the door with a fixed door frame.
  • the hydraulic fluid when opening the door must be able to flow very quickly from one cylinder chamber to the other, more precisely, from the rear to the front hydraulic chamber.
  • the return compression spring or compression springs is then tensioned in a known manner. If a locking device for the open door is missing or has not yet been activated, the reset pressure spring pushes the piston back into its original position. Now the hydraulic medium must flow from the front hydraulic room to the rear hydraulic room. In order for the closing movement to take place slowly, the hydraulic medium must take a different flow path. In this flow path or possibly also several flow paths there is one or each throttle element, preferably a throttle valve.
  • throttle valves and their associated channels can be provided, for example, in the manner known from DE-GM 8 526 660.
  • a generic door closer has become known from DE-A 1 759 450.
  • an overrun member is attached, which is located in the range of movement of the closing-end movement of the closing element of the overflow valve. Because of this, the closure member of the overflow valve, which is spring-loaded in the closing direction, is open when the door is closed and during the closing movement. It is then on the ramp element. When the door is open and during the rest of the closing movement of the latter, the closure member is held in the closed position by its loading spring. It follows that this overflow valve is a valve which can flow through in only one direction and acts in the manner of a check valve. It is therefore only of particular importance during the final closing movement.
  • a door equipped with a door closer is often opened by force.
  • the pressure medium must then flow as quickly as possible from the rear to the front hydraulic chamber.
  • the medium cannot flow through the overflow valve because it takes up its closed position shortly after the start of the rotary opening movement.
  • the object of the invention is to develop a door closer of the generic type that it allows the rapid overflow of the hydraulic medium in the event of sudden violent opening of the door without any particular structural outlay and space requirement.
  • the invention proposes that the door closer is designed according to the preamble of claim 1 in accordance with the characterizing part of this claim.
  • the overflow valve of this door closer can take on an additional task compared to that of the previously known construction, i.e. it can perform two separate functions. On the one hand, it opens during the final closing movement, so that the full force of the closing spring or springs can be fully utilized. On the other hand, if the door that is already slightly open suddenly opens again without the help of the overrun element and against the action of its closing spring, it is also possible to go into the open position solely due to the pressure conditions and thus the rapid overflow of the hydraulic medium from the rear to the front hydraulic chamber to allow. This opening of the overflow valve is achieved with the aid of the overflow channel.
  • the latter can cause the hydraulic pressure that suddenly increases when the door in the rear hydraulic chamber is opened violently to the closing end of the closing element of the overflow valve and then move it into the open position against the resistance of the loading spring. As soon as this strong excess pressure is eliminated or has decreased to such an extent that the force of the closing spring predominates, the closure member of the overflow valve returns to the closed position when the door is open accordingly.
  • This overflow valve is nevertheless of a simple design and therefore very robust. It can also be built relatively compact. While the closing-end movement, the opening-opening movement and the normal closing movement of the door closer with the aid of the return pressure spring or springs, the mode of operation of the overflow valve is comparable to that of DE-A 1 759 450. and fixable in the bottom of the housing so that the angle for the closing-final movement of the door can be adjusted.
  • a further embodiment of the invention is characterized in that, when the door is closed, the overrun member passes through the valve seat of the overflow valve, in particular with an overflow end with a reduced cross section.
  • the ramp element is expediently arranged concentrically with the closure element of the overflow valve.
  • a further development of the invention provides that the overrun member at its end facing away from the overflow valve has an approach engaging in a control groove of an adjusting member, the control groove converting an adjustment movement of the adjusting member into a displacement movement of the overrun member.
  • This displacement movement runs in the same direction as that of the valve closure member.
  • the overrun member is displaced towards the control valve and away from the control valve with a counter-rotating movement.
  • this value is specified as a fixed value.
  • a particularly preferred embodiment of the invention is characterized in that the adjusting member is a rotating member mounted in the housing base, the axis of rotation of which runs parallel to the longitudinal axis of the essentially bolt-like outlet member, the adjusting member being provided with a helical control groove into which a thickened head of a control attachment of the Adjusting member engages.
  • the control approach can consist, for example, of this thickened head and, in particular, a central retaining pin.
  • the adjusting member is provided with an externally accessible receptacle for an adjusting tool, in particular with a screwdriver slot. This means that the end closing movement of the door can be easily adjusted by every buyer of this door closer.
  • the exemplary embodiment is an overhead door closer, but the invention is not restricted to this.
  • a damping piston 2 and a spring piston 3 can be pushed back and forth in the direction of the double arrow 4 in a cylinder housing 1. They are rigidly connected to one another via a piston rod 5 with a rack 6. Those of a pinion 7 engage in the teeth of the rack. The pinion shaft is led outwards, and the door to be closed is connected to it in a rotationally fixed manner.
  • the piston-rack unit is displaced by turning the pinion 7, for example in the direction of arrow 8, from left to right, as a result of which two concentrically arranged restoring compression springs 9 and 10, which are supported at one end on the spring piston, are tensioned. These springs rest against a spring plate 11, which is located in the area of the free end of a spring cover 12.
  • the cylinder housing 1 is tightly closed by a plug-like housing base 13. It is screwed in and sealed against the cylinder housing by means of a sealing ring 14.
  • a front hydraulic chamber 15 is defined by the housing base 13 and the damping piston 2 and the cylinder housing 1.
  • a rear hydraulic chamber 16 extends from the damping piston 2 to the bottom of the spring cover 12. It receives both the piston rod 5 and the spring piston 3 and the return compression springs 9, 10. Because the rear hydraulic chamber 16 becomes smaller when the front hydraulic chamber 15 is enlarged, the medium located in the latter, in particular hydraulic oil, must be able to flow past and / or through the spring piston 3.
  • a symbolically drawn valve unit 17 can be installed in the spring piston 3. Otherwise, the damping piston 2, the spring piston 3 and the piston rod 5 could be viewed together as a single piston of the door closer provided with a recess, the pinion 7 projecting into this recess.
  • the spring cover 12 forms part of the door closer housing, and it is connected to the cylinder housing 1 at this point via a thread 18 and a corresponding seal.
  • Fig. 1 shows the piston or pistons 2 and 3 in their initial displacement position with the door closed. If the latter is opened, as mentioned, this leads to a rotation of the pinion in the direction of arrow 8 and to a displacement movement of the pistons 2 and 3 in the direction of arrow 19. Not only are the springs 9 and 10 tensioned, but also oil is extracted pressed out the rear hydraulic chamber 16 and transported into the front hydraulic chamber 15.
  • Correspondingly dimensioned cross sections allow a rapid overflow from space 16 into space 15.
  • the medium flows through an overflow channel 20 of a closure member 21 of an overflow valve 22.
  • it runs centrally to the geometric axis of the closure member 21 or overflow valve 22, while its left part runs obliquely to this.
  • the central part of the overflow channel consists of two parts, because the valve closure member 21 is itself made up of two elements.
  • the larger element 25 receives the ball 24 and the angular channel, while the smaller element 26 has only one centrally running channel piece and is connected to the larger one via a thread 27.
  • valve travel Both consist of a shaft with an outer collar each.
  • a sealing ring in particular an O-ring 28, is let into the outer collar of the larger element 25. It seals against a bore in the valve housing 29. This is screwed into the damping piston 2.
  • the threaded connection is designated 30.
  • a sealing ring at the transition from the shaft to the outer collar of the sleeve-shaped housing 29 bears the reference number 31.
  • a support disk 32 is inserted for one end of a load spring 33, the other end of which is supported on the outer collar of the larger element 25. It also enables assembly.
  • the support disk 32 can be held in place by flanging, and it receives the collar of the small element 26.
  • a central bore at the left end of the valve housing 29 in FIG. 2 forms the valve seat 23 mentioned on the inside, and it is penetrated from the outside in by the pin-like end 35 of an overrun member 34.
  • the loading spring 33 is then tensioned or tensioned more than in the closed position of the valve 22.
  • the valve seat 23 moves in the direction of the closure member or ball 24. In fact, however, it migrates the ball 24 or the closure member 21 due to the force of the spring 33 against the valve seat 23.
  • the closing angle from which the door closes unthrottled can now be set within a predetermined range.
  • the ramp member 34 is coupled to an adjusting member 36. 2, it is rotatably and immovably mounted in the housing base 13.
  • a snap ring 38 engages in mutually opposite grooves of the housing base and the adjusting member 36.
  • the latter is equipped with a helical control groove 39, into which a thickened head 40 of a control shoulder 41 engages at the left end of the ramp member 34 in FIG. 2.
  • the control lug 41 consists of a thin, central shaft.
  • the setting member 36 is equipped with a receptacle 42 accessible from the outside for an adjusting tool, in particular with a slot, cross slot or hexagon socket.
  • a receptacle 42 accessible from the outside for an adjusting tool, in particular with a slot, cross slot or hexagon socket.
  • the adjusting member 36 is displaced in the direction of the arrow 43 or in the opposite direction and thus an earlier or later opening of the overflow valve 22.
  • the overrun member 34 is opposite its sliding bore in the housing base 13 by means of a sealing ring , in particular an O-ring 44, sealed. 2 that the axis of rotation of the adjusting member 36 runs parallel to the axis of displacement of the overrun member 34 and the valve closure member 21, but is laterally offset with respect to this axis.

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  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)

Description

Die Erfindung bezieht sich auf einen Türschließer der im Oberbegriff des Anspruchs 1 beschriebenen Art. Solche Türschließer sind inden verschiedensten Ausführungen sowohl als Bodentürschließer als auch als Obentürschließer bekannt. In der Regel sind sie mit einer Hydraulikflüssigkeit gefüllt, die beim Verschieben des Dämpfungskolbens von einem Zylinderraum in den anderen strömt. Bewegt sich der Dämpfungskolben in Gegenrichtung, so erfolgt auch die Strömung in umgekehrtem Sinne. Bei einem Bodentürschließer wir die Tür mit dem Drehglied fest verbunden, während bei einem Obentürschließer mit dem Drehglied ein Gestänge gekuppelt ist, das die Verbindung von dem an der Tür befestigten Türschließer mit einem festen Türrahmen herstellt.The invention relates to a door closer of the type described in the preamble of claim 1. Such door closers are known in various designs both as floor door closers and as top door closers. As a rule, they are filled with a hydraulic fluid that flows from one cylinder chamber to the other when the damping piston is moved. If the damping piston moves in the opposite direction, the flow also takes place in the opposite direction. In the case of a floor door closer, the door is firmly connected to the rotary link, while in the case of an overhead door closer, a linkage is coupled to the rotary link, which connects the door closer attached to the door with a fixed door frame.

Da die Bewegung des Dämpfungskolbens über eine Drehbewegung der Tür erzeugt und letztere mitunter sehr rasch geöffnet wird, muß die Hydraulikflüssigkeit beim Öffnen der Tür sehr schnell vom einen in den anderen Zylinderraum, genau gesagt, vom hinteren in den vorderen Hydraulikraum strömen können. Dabei wird dann in bekannter Weise die Rückstell-Druckfeder oder -Druckfedern gespannt. Wenn eine Feststellvorrichtung für die geöffnete Tür fehlt oder sie noch nicht in Tätigkeit gesetzt ist, drückt die Tückstell-Druckfeder den Kolben wieder in seine Ausgangslage zurück. Nunmehr muß das Hydraulikmedium vom vorderen Hydraulikraum zum hinteren Hydraulikraum strömen. Damit die Schließbewegung langsam vonstatten geht, muß das Hydraulikmedium hierbei einen anderen Strömungsweg nehmen. In diesem Strömungsweg oder gegebenenfalls auch mehreren Strömungswegen befindet sich ein bzw. je ein Drosselorgan, vorzugsweise Drosselventil. Dies führt in der angestrebten Weise zu einem langsamen Schließen der Tür. Kurz bevor die Tür ganz geschlossen ist, muß die gedrosselte Rückströmung des Hydraulikmediums durch ein ungedrosseltes Strömen ersetzt werden. In dieser Schließendbewegung muß nämlich die Türfalle betätigt werden, und dies ist nur bei zumindest nahezu ungedrosselter Strömung möglich, bei welcher sich die volle Kraft der Rückstell-Druckfeder oder -Druckfedern auswirken kann.Since the movement of the damping piston is generated by a rotary movement of the door and the latter is sometimes opened very quickly, the hydraulic fluid when opening the door must be able to flow very quickly from one cylinder chamber to the other, more precisely, from the rear to the front hydraulic chamber. The return compression spring or compression springs is then tensioned in a known manner. If a locking device for the open door is missing or has not yet been activated, the reset pressure spring pushes the piston back into its original position. Now the hydraulic medium must flow from the front hydraulic room to the rear hydraulic room. In order for the closing movement to take place slowly, the hydraulic medium must take a different flow path. In this flow path or possibly also several flow paths there is one or each throttle element, preferably a throttle valve. This leads to a slow closing of the door in the desired manner. Shortly before the door is completely closed, the throttled backflow of the hydraulic medium must be replaced by an unthrottled flow. In this closing final movement, the door latch must be actuated, and this is only possible with an at least almost unrestricted flow, in which the full force of the return compression spring or compression springs can have an effect.

Weil es im vorliegenden Falle auf die gedrosselte Strömung sowie die Ausbildung der Drosselkanäle und Drosselventile im einzelnen nicht ankommt, diese vielmehr von bekannter Art sein können, wird auf eine Darstellung und genaue Beschreibung der Drosseleinrichtung verzichtet. Die Drosselventile und ihre zugehörigen Kanäle können beispielsweise in der durch das DE-GM 8 526 660 bekannten Weise vorgesehen werden.Because the throttled flow and the design of the throttle channels and throttle valves are not important in the present case, but rather can be of a known type, the throttle device is not shown and described in detail. The throttle valves and their associated channels can be provided, for example, in the manner known from DE-GM 8 526 660.

Wenn ein Benutzer eine geöffnete Tür mit Gewalt zudrückt, er also einen schnelleren Bewegungsablauf als er durch die Drosseleinrichtungen vorgegeben ist herbeiführen will, so muß durch das Uberströmventil der Überdruck im vorderen Hydraulikraum abgebaut werden. Damit wird gleichzeitig ein ungedämpfter Strömungsweg freigegeben.If a user presses an open door with force, that is, if he wants to bring about a faster movement than that specified by the throttle devices, the excess pressure in the front hydraulic chamber must be reduced by the overflow valve. At the same time, an undamped flow path is released.

Durch die DE-A 1 759 450 ist ein gattungsgemäßer Türschließer bekannt geworden. Am Gehäuseboden dieses Türschließers ist ein Auflaufglied angebracht, welches sich im Bewegungsbereich der Schließ-Endbewegung des Verschlußorgans des Überströmventils befindet. Aufgrund dessen ist das in Schließrichtung federbelastete Verschlußorgan des Überströmventils bei geschlosener Tür sowie während der Schließendbewegung offen. Es liegt dann am Auflaufglied an. Bei offener Tür sowie während der übrigen Schließbewegung der letzteren wird das Verschlußorgan von seiner Belastungsfeder in der geschlossenen Stellung gehalten. Daraus folgt, daß dieses Überströmventil ein lediglich in einer Richtung durchströmbares, in der Art eines Rückschlagventils wirksames Ventil ist. Ihm kommt demnach nur während der Schließ-Endbewegung eine besondere Bedeutung zu.A generic door closer has become known from DE-A 1 759 450. On the housing base of this door closer, an overrun member is attached, which is located in the range of movement of the closing-end movement of the closing element of the overflow valve. Because of this, the closure member of the overflow valve, which is spring-loaded in the closing direction, is open when the door is closed and during the closing movement. It is then on the ramp element. When the door is open and during the rest of the closing movement of the latter, the closure member is held in the closed position by its loading spring. It follows that this overflow valve is a valve which can flow through in only one direction and acts in the manner of a check valve. It is therefore only of particular importance during the final closing movement.

Eine mit einem Türschließer ausgestattete Tür wird nicht selten gewaltsam geöffnet. Hierbei muß dann das Druckmedium möglichst rasch vom hinteren in den vorderen Hydraulikraum überströmen. Durch das Überströmventil kann das Medium allerdings nicht hindurchfließen, weil dieses kurz nach Beginn der Dreh-Öffnungsbewegung seine geschlossene Stellung einnimmt.A door equipped with a door closer is often opened by force. The pressure medium must then flow as quickly as possible from the rear to the front hydraulic chamber. However, the medium cannot flow through the overflow valve because it takes up its closed position shortly after the start of the rotary opening movement.

Die Aufgabe der Erfindung besteht darin, einen Türschließer der gattungsgemäßen Art weiterzubilden, daß er ohne besonderen baulichen Aufwand und Platzbedarf das rasche Überströmen des Hydraulikmediums beim plötzlichen gewaltsamen Öffnen der Tür gestattet.The object of the invention is to develop a door closer of the generic type that it allows the rapid overflow of the hydraulic medium in the event of sudden violent opening of the door without any particular structural outlay and space requirement.

Zur Lösung dieser Aufgabe wird erfindungsgemäß vorgeschlagen, daß der Türschließer gemäß dem Oberbegriff des Anspruchs 1 entsprechend dem kennzeichnenden Teil dieses Anspruchs ausgebildet ist. Das Überströmventil dieses Türschließers kann gegenüber demjenigen der vorbekannten Konstruktion noch eine zusätzliche Aufgabe übernehmen, d.h. es kann zwei getrennte Funktionen ausüben. Zum einen öffnet es während der Schließ- Endbewegung, um dadurch die volle Kraft der Schließfeder oder -federn voll zur Geltung kommen zu lassen. Andererseits ist es aber auch fähig, bei einem plötzlichen weiteren Öffnen der schon etwas geöffneten Tür ohne Mithilfe des Auflaufglieds und entgegen der Wirkung seiner Schließfeder allein aufgrund der Druckverhältnisse in die Offenstellung zu gehen und dadurch das rasche Überströmen des hydraulischen Mediums vom hinteren in den vorderen Hydraulikraum zu gestatten. Man erreich dieses Öffnen des Überströmventils mit Hilfe des Überströmkanals. Über diesen kann sich nämlich der beim gewaltsamen Öffnen der Tür im hinteren Hydraulikraum schlagartig erhöhende hydraulische Druck zum schließseitigen Ende des Verschlußorgans des Überströmventils hin ausbreiten und dieses dann gegen den Widerstand der Belastungsfeder in die Öffnungsstellung verschieben. Sobald dieser starke Überdruck entfällt oder soweit zurückgegangen ist, daß die Kraft der Schließfeder überwiegt, kehrt das Verschlußorgan des Überströmventils bei entsprechender Offenstellung der Tür in die Schließlage zurück.To solve this problem, the invention proposes that the door closer is designed according to the preamble of claim 1 in accordance with the characterizing part of this claim. The overflow valve of this door closer can take on an additional task compared to that of the previously known construction, i.e. it can perform two separate functions. On the one hand, it opens during the final closing movement, so that the full force of the closing spring or springs can be fully utilized. On the other hand, if the door that is already slightly open suddenly opens again without the help of the overrun element and against the action of its closing spring, it is also possible to go into the open position solely due to the pressure conditions and thus the rapid overflow of the hydraulic medium from the rear to the front hydraulic chamber to allow. This opening of the overflow valve is achieved with the aid of the overflow channel. The latter can cause the hydraulic pressure that suddenly increases when the door in the rear hydraulic chamber is opened violently to the closing end of the closing element of the overflow valve and then move it into the open position against the resistance of the loading spring. As soon as this strong excess pressure is eliminated or has decreased to such an extent that the force of the closing spring predominates, the closure member of the overflow valve returns to the closed position when the door is open accordingly.

Dieses Überströmventil ist trotzdem von einfacher Bauart und damit sehr robust. Es kann auch verhältnismäßig kompakt gebaut werden. Während der Schließ-Endbewegung, der Anfangs-Öffnungsbewegung sowie der normalen Schließbewegung des Türschließers mit Hilfe der Rückstelldruckfeder oder -federn ist die Wirkungsweise des Überströmventils vergleichbar mit derjenigen der DE-A 1 759 450. Außerdem kann man auch bei diesem Türschließer das Auflaufglied abgedichtet verschieb- und festsetzbar im Gehäuseboden lagern, so daß sich der Winkel für die Schließ-Endbewegung der Tür einstellen läßt.This overflow valve is nevertheless of a simple design and therefore very robust. It can also be built relatively compact. While the closing-end movement, the opening-opening movement and the normal closing movement of the door closer with the aid of the return pressure spring or springs, the mode of operation of the overflow valve is comparable to that of DE-A 1 759 450. and fixable in the bottom of the housing so that the angle for the closing-final movement of the door can be adjusted.

Eine weitere Ausgestaltung der Erfindung kennzeichnet sich dadurch, daß das Auflaufglied bei geschlossener Tür den Ventilsitz des Überströmventils, insbesondere mit einem im Querschnitt reduzierten Auflaufende durchsetzt. Das Auflaufglied ist zweckmäßigerweise konzentrisch zum Verschlußorgan des Überströmventils angeordnet.A further embodiment of the invention is characterized in that, when the door is closed, the overrun member passes through the valve seat of the overflow valve, in particular with an overflow end with a reduced cross section. The ramp element is expediently arranged concentrically with the closure element of the overflow valve.

Eine Weiterbildung der Erfindung sieht vor, daß das Auflaufglied an seinem vom Uberströmventil abgewandten Ende einen in eine Steuernut eines Einstellglieds eingreifenden Ansatz aufweist, wobei die Steuernut eine Verstellbewegung des Einstellglieds in eine Verschiebebewegung des Auflaufglieds umsetzt. Dabei verläuft diese Verschiebebewegung in gleicher Richtung wie diejenige des Ventil-Verschlußorgans. Durch Drehen in der einen Richtung erreicht man ein Verschieben des Auflaufglieds gegen das Steuerventil hin und bei gegenläufiger Drehbewegung vom Steuerventil weg. Auf diese Weise läßt sich, wie gesagt, in vorteilhafter Weise der Zeitpunkt verändern, ab welchem die ungedrosselte Schließ-Endbewegung der Tür beginnt. Dieser Wert ist bei den bekannten Ausführungen als fester Wert vorgegeben.A further development of the invention provides that the overrun member at its end facing away from the overflow valve has an approach engaging in a control groove of an adjusting member, the control groove converting an adjustment movement of the adjusting member into a displacement movement of the overrun member. This displacement movement runs in the same direction as that of the valve closure member. By rotating in one direction, the overrun member is displaced towards the control valve and away from the control valve with a counter-rotating movement. In this way, as I said, the point in time from which the unthrottled final closing movement of the door begins can be changed in an advantageous manner. In the known designs, this value is specified as a fixed value.

Eine besonders bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, daß das Einstellglied ein im Gehäuseboden gelagertes Drehglied ist, dessen Drehachse parallel zur Längsachse des im wesentlichen bolzenartigen Ausflaufglieds verläuft, wobei das Einstellglied mit einer schraubenförmigen Steuernut versehen ist, in welche ein verdickter Kopf eines Steueransatzes des Einstellglieds eingreift. Der Steueransatz kann beispielsweise aus diesem verdickten Kopf und einem insbesondere zentrischen Haltestift bestehen.A particularly preferred embodiment of the invention is characterized in that the adjusting member is a rotating member mounted in the housing base, the axis of rotation of which runs parallel to the longitudinal axis of the essentially bolt-like outlet member, the adjusting member being provided with a helical control groove into which a thickened head of a control attachment of the Adjusting member engages. The control approach can consist, for example, of this thickened head and, in particular, a central retaining pin.

Eine weitere Variante der Erfindung besteht darin, daß das Einstellglied mit einer von außen zugänglichen Aufnahme für ein Verstellwerkzeug, insbesondere mit einem Schraubendreherschlitz, versehen ist. Damit kann die Schließ-Endbewegung der Tür von jedem Käufer dieses Türschließers leicht selbst einreguliert werden.Another variant of the invention is that the adjusting member is provided with an externally accessible receptacle for an adjusting tool, in particular with a screwdriver slot. This means that the end closing movement of the door can be easily adjusted by every buyer of this door closer.

Weitere Ausgestaltungen und Vorteile dieses Türschließers ergeben sich aus den Ansprüchen sowie der nachstehenden Beschreibung eines Ausführungsbeispiels.Further refinements and advantages of this door closer result from the claims and the following description of an exemplary embodiment.

Die Zeichnung zeigt ein solches Ausführungsbeispiel der Erfindung. Hierbei stellen dar:

  • Fig. 1: Einen Längsschnitt durch den Türschließer senkrecht zur Ritzeldrehachse,
  • Fig. 2: in vergrößertem Maßstab weitere Details des linken Endes der Fig. 1 im Schnitt.
The drawing shows such an embodiment of the invention. Here represent:
  • 1: a longitudinal section through the door closer perpendicular to the pinion rotation axis,
  • Fig. 2: on an enlarged scale further details of the left end of Fig. 1 in section.

Beim Ausführungsbeispiel handelt es sich um einen Obentürschließer, jedoch ist die Erfindung hierauf nicht beschränkt. In einem Zylindergehäuse 1 sind ein Dämpfungskolben 2 und ein Federkolben 3 im Sinne des Doppelpfeils 4 hin- und herverschiebbar. Sie sind über eine Kolbenstange 5 mit einer Zahnstange 6 starr miteinander verbunden. In die Zähne der Zahnstange greifen diejenigen eines Ritzels 7 ein. Die Ritzelwelle ist nach außen hin durchgeführt, und mit ihr wird die zu schließende Tür drehfest verbunden.The exemplary embodiment is an overhead door closer, but the invention is not restricted to this. A damping piston 2 and a spring piston 3 can be pushed back and forth in the direction of the double arrow 4 in a cylinder housing 1. They are rigidly connected to one another via a piston rod 5 with a rack 6. Those of a pinion 7 engage in the teeth of the rack. The pinion shaft is led outwards, and the door to be closed is connected to it in a rotationally fixed manner.

Die Kolben-Zahnstangeneinheit wird durch Drehen des Ritzels 7 beispielsweise in Pfeilrichtung 8 von links nach rechts verschoben, wodurch zwei konzentrisch angeordnete, sich einenends am Federkolben abstützende Rückstell-Druckfedern 9 und 10 gespannt werden. Diese Federn liegen andernends an einem Federteller 11 an, der sich im Bereich des freien Endes einer Federhaube 12 befindet. Auf der linken Seite ist das Zylindergehäuse 1 durch einen stopfenartigen Gehäuseboden 13 dicht verschlossen. Er ist eingeschraubt und mittels eines Dichtrings 14 gegen das Zylindergehäuse abgedichtet.The piston-rack unit is displaced by turning the pinion 7, for example in the direction of arrow 8, from left to right, as a result of which two concentrically arranged restoring compression springs 9 and 10, which are supported at one end on the spring piston, are tensioned. These springs rest against a spring plate 11, which is located in the area of the free end of a spring cover 12. On the left side, the cylinder housing 1 is tightly closed by a plug-like housing base 13. It is screwed in and sealed against the cylinder housing by means of a sealing ring 14.

Durch den Gehäuseboden 13 und den Dämpfungskolben 2 sowie das Zylindergehäuse 1 wird ein vorderer Hydraulikraum 15 definiert. Ein hinterer Hydraulikraum 16 erstreckt sich vom Dämpfungskolben 2 bis zum Boden der Federhaube 12. Er nimmt sowohl die Kolbenstange 5 als auch den Federkolben 3 und die Rückstell-Druckfedern 9, 10 auf. Weil sich bei einem Vergrößern des vorderen Hydraulikraums 15 der hintere Hydraulikraum 16 verkleinert, muß das in letzterem befindliche Medium, insbesondere Hydrauliköl, am Federkolben 3 vorbei und/oder durch diesen hindurchfließen können. Zu diesem Zwecke kann beispielsweise in den Federkolben 3 eine symbolisch eingezeichnete Ventileinheit 17 eingebaut sein. Im übrigen könnte man den Dämpfungskolben 2, den Federkolben 3 und die Kolbenstange 5 zusammen als einen einzigen mit einer Ausnehmung versehenen Kolben des Türschließers ansehen, wobei in diese Ausnehmung das Ritzel 7 hineinragt. Die Federhaube 12 stellt einen Teil des Türschließergehäuses dar, und sie ist über ein Gewinde 18 sowie eine entsprechende Abdichtung an dieser Stelle mit dem Zylindergehäuse 1 verbunden.A front hydraulic chamber 15 is defined by the housing base 13 and the damping piston 2 and the cylinder housing 1. A rear hydraulic chamber 16 extends from the damping piston 2 to the bottom of the spring cover 12. It receives both the piston rod 5 and the spring piston 3 and the return compression springs 9, 10. Because the rear hydraulic chamber 16 becomes smaller when the front hydraulic chamber 15 is enlarged, the medium located in the latter, in particular hydraulic oil, must be able to flow past and / or through the spring piston 3. For this purpose, for example, a symbolically drawn valve unit 17 can be installed in the spring piston 3. Otherwise, the damping piston 2, the spring piston 3 and the piston rod 5 could be viewed together as a single piston of the door closer provided with a recess, the pinion 7 projecting into this recess. The spring cover 12 forms part of the door closer housing, and it is connected to the cylinder housing 1 at this point via a thread 18 and a corresponding seal.

Fig. 1 zeigt den bzw. die Kolben 2 und 3 in ihrer Verschiebe-Ausgangsstellung bei geschlossener Tür. Wird letztere geöffnet, so führt dies, wie gesagt, zu einem Drehen des Ritzels in Pfeilrichtung 8 und zu einer Verschiebebewegung der Kolben 2 und 3 im Sinne des Pfeils 19. Dabei werden nicht nur die Federn 9 und 10 gespannt, vielmehr wird auch Öl aus dem hinteren Hydraulikraum 16 herausgepresst und in den vorderen Hydraulikraum 15 befördert.Fig. 1 shows the piston or pistons 2 and 3 in their initial displacement position with the door closed. If the latter is opened, as mentioned, this leads to a rotation of the pinion in the direction of arrow 8 and to a displacement movement of the pistons 2 and 3 in the direction of arrow 19. Not only are the springs 9 and 10 tensioned, but also oil is extracted pressed out the rear hydraulic chamber 16 and transported into the front hydraulic chamber 15.

Entsprechend dimensionierte Querschnitte erlauben ein zügiges Überströmen vom Raum 16 in den Raum 15. Das Medium fließt hierbei durch einen Überströmkanal 20 eines Verschlußorgans 21 eines Überströmventils 22. Er verläuft in seinem in Fig. 2 rechten Teil zentrisch zur geometrischen Achse des Verschlußorgans 21 bzw. Überströmventils 22, während sein linker Teil schräg hierzu verläuft. Dies hängt damit zusammen, daß das Verschlußorgan 21 an seinem dem Ventilsitz 23 zugeordneten Ende eine unmittelbar mit dem Ventilsitz zusammenwirkende Kugel 24 befindet. Der zentrisch verlaufende Teil des Überströmkanals besteht aus zwei Teilen, weil das Ventil-Verschlußorgan 21 seinerseits aus zwei Elementen aufgebaut ist. Das größere Element 25 nimmt die Kugel 24 und den winkelförmigen Kanal auf, während das kleinere Element 26 nur ein zentrisch verlaufendes Kanalstück aufweist und mit dem größeren über eine Gewinde 27 verbunden ist. Seine Funktion liegt in der zusätzlichen Begrenzung des Ventilwegs. Beide bestehen aus einem Schaft mit jeweils einem Außenbund. In den Außenbund des größeren Elements 25 ist ein Dichtring, insbesondere O-Ring 28, eingelassen. Er dichtet gegenüber einer Bohrung des Ventilgehäuses 29 ab. Dieses ist in den Dämpfungskolben 2 eingeschraubt. Die Gewindeverbindung ist mit 30 bezeichnet. Ein Dichtring am Übergang vom Schaft zum Außenbund des hülsenförmigen Gehäuses 29 trägt die Bezugszahl 31. Am freien Schaftende ist eine Stützscheibe 32 für das eine Ende einer Belastungsfeder 33 eingesetzt, deren anderes Ende sich am Außenbund des größeren Elements 25 abstützt. Es ermöglicht auch die Montage. Die Stützscheibe 32 kann durch Umbördelung festgehalten werden, und sie nimmt den Bund des kleinen Elements 26 auf. Eine zentrische Bohrung am in Fig. 2 linken Ende des Ventilgehäuses 29 bildet innen den erwähnten Ventilsitz 23, und sie wird von außen nach innen von dem zapfenartigen Ende 35 eines Auflaufglieds 34 durchsetzt. Dieses hält das Überströmventil 22 in der gezeichneten Stellung des Dämpfungskolbens 2, also bei geschlossener Tür und kurz davor, offen. Die Belastungsfeder 33 ist dann gespannt bzw. stärker gespannt als in der Schließstellung des Ventils 22. Wenn die Tär geöffnet wird, also bei einer Verschiebung der Kolben in Pfeilrichtung 19, bewegt sich der Ventilsitz 23 in Richtung Verschlußorgan bzw. Kugel 24. Tatsächlich wandert aber die Kugel 24 bzw. das Verschlußorgan 21 aufgrund der Kraft der Feder 33 gegen den Ventilsitz 23 hin. Weil sich jedoch bei dieser Kolbenverschiebung der Druck im hinteren Hydraulikraum 16 erhöht, baut sich in dem bei dieser Kolbenverschiebung als Zuströmraum des Ventils 22 dienenden Ventilraum 37 ebenfalls ein Überdruck auf, welcher das Überströmventil 22 offenhält. Wenn der Druck zwischen dem vorderen und dem hinteren Hydraulikraum ausgeglichen ist, so schließt das Überströmventil 22. Bei einem Öffnungswinkel von beispielsweise etwa 90° drücken die Rückstell-Druckfedern 9 und 10 die Kolben 3 und 2 entgegen dem Pfeil 19 von rechts nach links. Das nunmehr aus dem vorderen Hydraulikraum 15 verdrängte Medium strömt dabei in bekannter und deshalb nicht näher gezeigten Weise (z.B. gemäß DE-GM 85 26 660) über wenigstens einen Kanal und mindestens ein Drosselventil im Zylindergehäuse 1. Aufgrund der Drosselwirkung kann sich die Kraft der Federn 9 und 10 nur sehr langsam auswirken, und dies führt dann in der angestrebten Weise zu einem langsamen Schließen der Tür.Correspondingly dimensioned cross sections allow a rapid overflow from space 16 into space 15. The medium flows through an overflow channel 20 of a closure member 21 of an overflow valve 22. In its right part in FIG. 2, it runs centrally to the geometric axis of the closure member 21 or overflow valve 22, while its left part runs obliquely to this. This is due to the fact that the closure member 21 is associated with the valve seat 23 End is a ball 24 directly cooperating with the valve seat. The central part of the overflow channel consists of two parts, because the valve closure member 21 is itself made up of two elements. The larger element 25 receives the ball 24 and the angular channel, while the smaller element 26 has only one centrally running channel piece and is connected to the larger one via a thread 27. Its function is the additional limitation of the valve travel. Both consist of a shaft with an outer collar each. A sealing ring, in particular an O-ring 28, is let into the outer collar of the larger element 25. It seals against a bore in the valve housing 29. This is screwed into the damping piston 2. The threaded connection is designated 30. A sealing ring at the transition from the shaft to the outer collar of the sleeve-shaped housing 29 bears the reference number 31. At the free shaft end, a support disk 32 is inserted for one end of a load spring 33, the other end of which is supported on the outer collar of the larger element 25. It also enables assembly. The support disk 32 can be held in place by flanging, and it receives the collar of the small element 26. A central bore at the left end of the valve housing 29 in FIG. 2 forms the valve seat 23 mentioned on the inside, and it is penetrated from the outside in by the pin-like end 35 of an overrun member 34. This keeps the overflow valve 22 open in the position shown of the damping piston 2, that is to say with the door closed and just before it. The loading spring 33 is then tensioned or tensioned more than in the closed position of the valve 22. When the door is opened, that is to say when the pistons are displaced in the direction of arrow 19, the valve seat 23 moves in the direction of the closure member or ball 24. In fact, however, it migrates the ball 24 or the closure member 21 due to the force of the spring 33 against the valve seat 23. However, because the pressure in the rear hydraulic chamber 16 increases with this piston displacement, an overpressure also builds up in the valve chamber 37, which serves as the inflow chamber of the valve 22 in this piston displacement, which keeps the overflow valve 22 open. When the pressure between the front and the rear hydraulic chamber is balanced, the overflow valve 22 closes. At an opening angle of, for example, approximately 90 ° , the return pressure springs 9 and 10 press the pistons 3 and 2 against the arrow 19 from right to left. The medium now displaced from the front hydraulic chamber 15 flows in a known and therefore not shown manner (for example according to DE-GM 85 26 660) via at least one channel and at least one throttle valve in the cylinder housing 1. Due to the throttling effect, the force of the springs can 9 and 10 affect only very slowly, and this leads in the desired manner to a slow closing of the door.

Kurz bevor die Kolben 2 und 3 ihre Verschiebeendlange erreicht haben, läuft die Kugel 24 am zapfenartigen Ende 35 des Auflaufglieds 34 auf und öffnet das Überströmventil 22. Dadurch findet ein schneller Druckausgleich vom vorderen zum hinteren Hydraulikraum 16 statt. Die schließendbewegung läuft infolgedessen ungedrosselt ab, und damit kann die Kraft der Federn 9 und 10 voll zur Betätigung einer Schloßfalle in einem Schloß der mit diesem Türschließer ausgestatteten Tür ausgenutzt werden.Shortly before the pistons 2 and 3 have reached their displacement end length, the ball 24 runs on the pin-like end 35 of the run-up member 34 and opens the overflow valve 22. As a result, the pressure from the front to the rear hydraulic chamber 16 is quickly equalized. The closing movement is consequently unthrottled, and thus the force of the springs 9 and 10 can be fully used to actuate a lock latch in a lock of the door equipped with this door closer.

Wenn die teilweise geöffnete Tür gewaltsam zugedrückt wird, so führt dies zu einem stärkeren Druckanstieg im vorderen Hydraulikraum 15. Dieser Druck ist dann groß genug, um die Kraft der Belastungsfeder 33 des Überströmventils 22 zu überwinden. Somit fließt der Großteil des Mediums nicht mehr über den oder die genannten Drosselkanäle und Drosselventile, sondern durch das Überströmventil 22, wobei dann der Ventilraum 37 den Abströmraum bildet. Falls man in einer Öffnungs;Zwischenstellung die Tür freigibt, schließt das Uberströmventil 22, und die Schließbewegung erfolgt dann zunächst gedrosselt in der vorstehend geschilderten Weise.If the partially opened door is forced shut, this leads to a greater increase in pressure in the front hydraulic chamber 15. This pressure is then high enough to overcome the force of the loading spring 33 of the overflow valve 22. Thus, the majority of the medium no longer flows via the or the mentioned throttle channels and throttle valves, but rather through the overflow valve 22, the valve space 37 then forming the outflow space. If the door is released in an intermediate opening position, the overflow valve 22 closes, and the closing movement then takes place initially in a throttled manner as described above.

Aus dem Vorstehenden wird deutlich, daß die Größe der Schließendbewegung mit ungedrosseltem Überströmen des Mediums von vorderen Hydraulikraum 15 zum hinteren Hydraulikraum 16 davon abhängt, wann das Verschlußorgan, oder genau gesagt, dessen Kugel 24 am Auflaufglied 34 bzw. dessen zapfenartigem Ende 35 auftrifft. Bei den bekannten Türschließern handelt es sich insoweit nachteiligerweise um eine feststehende Größe.From the above it is clear that the magnitude of the closing end movement with unrestricted overflow of the medium from the front hydraulic chamber 15 to the rear hydraulic chamber 16 depends on when the closure member, or more precisely, its ball 24 hits the run-up member 34 or its pin-like end 35. In this respect, the known door closers are disadvantageously a fixed size.

Erfindungsgemäß kann nun der Schließwinkel, ab welchem die Tür ungedrosselt schließt, innerhalb eines vorgegebenen Bereichs eingestellt werden. Zu diesem Zwecke ist das Auflaufglied 34 mit einem Einstellglied 36 gekuppelt. Es ist, wie insbesondere Fig. 2 deutlich zeigt, drehbar und unverschiebbar im Gehäuseboden 13 gelagert. Zu diesem Zwecke greift ein Sprengring 38 in einander gegenüberliegende Nuten des Gehäusebodens und des Einstellglieds 36. Letzteres ist mit einer schraubenförmigen Steuernut 39 ausgestattet, in welche ein verdickter Kopf 40 eines Steueransatzes 41 am in Fig. 2 linken Ende des Auflaufglieds 34 eingreift. Außer dem verdickten Kopf besteht des Steueransatz 41 aus einem dünnen, zentrischen Schaft. Außerdem ist das Einstellglied 36 mit einer von außen zugänglichen Aufnahme 42 für ein Verstellwerkzeug ausgestattet, insbesondere mit einem Schlitz, Kreuzschlitz oder Innensechskant. Durch Drehen des Einstellglieds 36 in der einen oder anderen Drehrichtung erreicht man ein Verschieben des Einstellglieds 36 in Richtung des Pfeils 43 oder in Gegenrichtung und damit ein früheres oder späteres Öffnen des Überströmventils 22. Das Auflaufglied 34 ist gegenüber seiner Verschiebebohrung im Gehäuseboden 13 mittels eines Dichtrings, insbesondere eines O-Rings 44, abgedichtet. Außerdem sieht man aus Fig. 2, daß die Drehachse des Einstellglieds 36 parallel zur Verschiebeachse des Auflaufglieds 34 und des Ventil-Verschlußorgans 21 verläuft, gegenüber dieser Achse aber seitlich versetzt ist.According to the invention, the closing angle from which the door closes unthrottled can now be set within a predetermined range. For this purpose the ramp member 34 is coupled to an adjusting member 36. 2, it is rotatably and immovably mounted in the housing base 13. For this purpose, a snap ring 38 engages in mutually opposite grooves of the housing base and the adjusting member 36. The latter is equipped with a helical control groove 39, into which a thickened head 40 of a control shoulder 41 engages at the left end of the ramp member 34 in FIG. 2. In addition to the thickened head, the control lug 41 consists of a thin, central shaft. In addition, the setting member 36 is equipped with a receptacle 42 accessible from the outside for an adjusting tool, in particular with a slot, cross slot or hexagon socket. By turning the adjusting member 36 in one or the other direction of rotation, the adjusting member 36 is displaced in the direction of the arrow 43 or in the opposite direction and thus an earlier or later opening of the overflow valve 22. The overrun member 34 is opposite its sliding bore in the housing base 13 by means of a sealing ring , in particular an O-ring 44, sealed. 2 that the axis of rotation of the adjusting member 36 runs parallel to the axis of displacement of the overrun member 34 and the valve closure member 21, but is laterally offset with respect to this axis.

Durch die Kombination der geschilderten Funktionen über ein problemlos zu fertigendes und zu montierendes Überströmventil 20 und seine Verbindung mit einem vestellbaren Auflaufglied 34 erreicht man einen einfachen sowie preisgünstigen Aufbau und erstmals auch die Möglichkeit, die Größe der Schließendbewegung in einem vorgegebenen Rahmen zu verändern bzw. einzustellen.By combining the described functions via a problem-free to manufacture and mon animal overflow valve 20 and its connection with an adjustable overrun member 34 one achieves a simple and inexpensive construction and for the first time also the possibility of changing or adjusting the size of the closing movement within a predetermined range.

Claims (13)

1. Door closing device with a rotating element (7), the movement of which can be converted into a displacement movement of a piston rod (5), the piston rod (5) which bears at least one damping piston (2) being displacable when the door is opened against the force of at least one restoring pressure spring (9, 10), with at least one overflow valve (22) which has a spring-loaded (33) closure member (21) in the damping piston (2) and which hydraulically connects a front hydraulic chamber (15) which is positioned between the damping piston (2) and a housing base (13) to a rear hydraulic chamber (16) which is positioned behind the piston (2), the front and rear hydraulic chambers moreover being hvdraulically connected by means of at least one throttle duct and at least one throttle valve and a primary element (34) being attached to the housing base (13), which element is situated in the area of movement of the closing final movement of the closure member (21) of the overflow valve (22), the closure member (21) being open when the door is closed and during the closing final movement and abuttina against the primary element (34) whilst being retained in the closed position by its loading spring (33) when the door is open and during the remaining closing movement of the door, characterized in that the closure member (21) of the overflow valve (22) is provided with at least one overflow duct (20) which hydraulically connects the rear hydraulic chamber (16) with the valve chamber (37), forming the rear pressure chamber of the overflow valve (20) when the valve is flowed through from the front hydraulic chamber (15) to the rear hvdraulic chamber (16): and in that the closure member (21) of the overflow valve (22) is sealed opposite the boring of its valve housing (29) by means of an embedded sealing ring, in particular an O-Ring (28), the overflow duct (20) of the closure member (21) opening out centrally to the outside on the one hand between the end thereof disposed at the valve seat (23) and the sealing ring (28) inclined to the direction of displacement and on the other hand opening out centrally to the outside at the shaft end opposite the ball.
2. Door closing device according to claim 1, characterized in that the primary element (34) penetrates the valve seat (23) of the overflow valve (22) when the door is closed, in particular with a primary end with a reduced cross-section.
3. Door closing device according to claims 1 or 2, characterized in that the closure member (21) of the overflow valve (22) is formed in a spherical manner at its end associated with the valve seat (23) or bears a ball (24) and is formed in two parts, both parts (25, 26) comprising essentially a shaft with outer band and preferably being joined together by means of a thread (27).
4. Door closing device according to claim 3, characterized in that the loading spring (33) of the closure member (21) of the overflow valve (22) is supported at one end on the outer band of the larger closure member element (25) at the valve seat side or the like, and at the other end on a support disk (32) secured in the valve housing (29) and disposed between the outer bands.
5. Door closing device according to at least one of the preceding claims, characterized in that the housing (29) of the overflow valve (22) is inserted, in particular is screwed in, in a fluid-tight manner in the damping pistons (2).
6. Door closing device according to at least one of the preceding claims, characterized in that the primary element (34) has at its end used by the overflow valve (22) an attachment (41) which engages in a control groove (39) of a setting element (36), the control groove converting an adjusting movement of the setting element (36) into a displacement movement of the primary element (34).
7. Door closing device according to claim 6, characterized in that the setting element (36) is a rotating element mounted in the housing base (13), and of which the rotating axis extends parallel to the longitudinal axis of the essentially bolt-like primary element (34), the setting element (36) being provided with a screw-shaped control groove (39) in which a thickened head (40) of a control attachment (41) of the setting element (36) engages.
8. Door closing device according to claim 7, characterized in that the setting element (36) is provided with an accommodating device (42) accessible from the outside for an adjusting tool, in particular with a screw driver slit.
EP89101415A 1988-02-13 1989-01-27 Door closer Expired - Lifetime EP0328917B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8801898U 1988-02-13
DE8801898U DE8801898U1 (en) 1988-02-13 1988-02-13 Door closer

Publications (2)

Publication Number Publication Date
EP0328917A1 EP0328917A1 (en) 1989-08-23
EP0328917B1 true EP0328917B1 (en) 1990-11-28

Family

ID=6820667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89101415A Expired - Lifetime EP0328917B1 (en) 1988-02-13 1989-01-27 Door closer

Country Status (2)

Country Link
EP (1) EP0328917B1 (en)
DE (2) DE8801898U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2924216B1 (en) 2014-03-24 2017-05-03 Gretsch-Unitas GmbH Baubeschläge Door closer
IT202100011669A1 (en) * 2021-05-06 2022-11-06 Colcom Group S R L HINGE FOR THE REVOLVING MOVEMENT OF A DOOR, SASH OR SIMILAR

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10145200B4 (en) * 2001-09-13 2015-09-10 Geze Gmbh door closers
DE102012100924A1 (en) * 2012-02-06 2013-08-08 Dorma Gmbh + Co. Kg Door operator with multi-part housing construction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1965805A (en) * 1931-12-24 1934-07-10 David E Riggins Doorcheck
DE1149271B (en) * 1960-09-05 1963-05-22 Schuermann & Co Heinz Telescopic door closer
DE1759450A1 (en) * 1968-05-02 1971-06-03 Ver Baubeschlag Gretsch Co Overhead door closer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2924216B1 (en) 2014-03-24 2017-05-03 Gretsch-Unitas GmbH Baubeschläge Door closer
IT202100011669A1 (en) * 2021-05-06 2022-11-06 Colcom Group S R L HINGE FOR THE REVOLVING MOVEMENT OF A DOOR, SASH OR SIMILAR

Also Published As

Publication number Publication date
DE8801898U1 (en) 1988-03-24
EP0328917A1 (en) 1989-08-23
DE58900027D1 (en) 1991-01-10

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