EP2921626B1 - Door closer - Google Patents

Door closer Download PDF

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Publication number
EP2921626B1
EP2921626B1 EP14160683.0A EP14160683A EP2921626B1 EP 2921626 B1 EP2921626 B1 EP 2921626B1 EP 14160683 A EP14160683 A EP 14160683A EP 2921626 B1 EP2921626 B1 EP 2921626B1
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EP
European Patent Office
Prior art keywords
closer
piston
housing
shaft
door closer
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.)
Active
Application number
EP14160683.0A
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German (de)
French (fr)
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EP2921626A1 (en
EP2921626B2 (en
Inventor
Singer Lothar
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
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Application filed by Gretsch Unitas GmbH Baubeschlaege filed Critical Gretsch Unitas GmbH Baubeschlaege
Priority to EP14160683.0A priority Critical patent/EP2921626B2/en
Priority to PL14160683.0T priority patent/PL2921626T5/en
Publication of EP2921626A1 publication Critical patent/EP2921626A1/en
Publication of EP2921626B1 publication Critical patent/EP2921626B1/en
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Publication of EP2921626B2 publication Critical patent/EP2921626B2/en
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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
    • E05F3/10—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
    • E05F3/104—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 cam-and-slide transmission between driving shaft and piston within the closer housing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2600/00—Mounting or coupling arrangements for elements provided for in this subclass
    • E05Y2600/10—Adjustable or movable
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2600/00—Mounting or coupling arrangements for elements provided for in this subclass
    • E05Y2600/10—Adjustable or movable
    • E05Y2600/30—Adjustable or movable characterised by the type of motion
    • E05Y2600/32—Rotary motion
    • E05Y2600/322—Rotary motion around a horizontal axis
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/40—Protection
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/40—Protection
    • E05Y2800/409—Protection against faulty mounting or coupling

Definitions

  • Door closers of the above type are common, for example, as overhead door closer.
  • a generic overhead door closer is in DE 10 2004 041 358 A1 disclosed.
  • a closer shaft transmits the closing force generated by a closing spring to the door leaf to be closed.
  • the closing force is built up when opening the then automatically closing door leaf.
  • a closing piston is arranged in the interior of a door closer housing, which moves when opening and closing the door leaf along a housing axis of the door closer housing.
  • a pivotable about a roller rotation axis bearing roller of the closing piston is supported on a Hubkurvenin the closer shaft.
  • the bearing roller is located on a control surface of the Hubkurvenusion with a parallel to the roller rotation axis extending bearing surface.
  • the control surface of the Hubkurvenation runs parallel to a shaft rotation axis about which the Hubkurvenin provided with the closer shaft is rotatable.
  • the Hubkurvenin is applied to the closer shaft of the shutter spring on the closing piston and provided between the closing piston and the Hubkurvenin bearing roller with the closing force.
  • the closer shaft performs a rotary movement, which is converted, for example, via a linkage into a closing movement of the door leaf.
  • Hubkurvenin drives them acting on the bearing roller and on this the closing piston against the action of a force exerted by the closing spring restoring force along the housing axis of the door closer housing. Both when closing and when opening the door, the control surface roll on the Hubkurvenin and the bearing surface on the bearing roller from each other.
  • An impairment of the door closer efficiency is also due to the fact that in a misalignment of the Hubkurvenin and / or the bearing roller in the power transmission between the Hubkurvenin and the bearing roller on the closer piston a tilting moment acts, due to which increases the friction, which in the movements of the Closing piston along the housing axis between the closing piston and this leading inner wall of the door closer housing occurs.
  • Due to the mentioned effects of line contact of Hubkurvention and bearing roller of the door closer according to the invention has a particularly high efficiency.
  • the force required to open the relevant door leaf is comparatively low.
  • the closing force-generating and also the closing force-transmitting door closer components can build relatively small.
  • the material used in the production of the door closer according to the invention is relatively low, the production costs are relatively low.
  • the closer shaft can be mounted on the door closer housing such that tilting movements of the closer shaft are excluded relative to the door closer housing, the required for automatic mutual alignment of Hubkurvenemia and the bearing roller tilting mobility is provided in a preferred embodiment of the invention bearing roller side.
  • the bearing roller in the direction of Kippbewegritt the bearing surface of the bearing roller supported substantially free of play on the closing piston and the closing piston relative to the door closer housing tiltable.
  • Such a tilting movement of the closing piston does not exist on conventional door closers, on which the closing piston is linearly guided during movements along the housing axis via a fit on the door closer housing.
  • the tilting movement of the closing piston relative to the door closer housing is made possible by the fact that the closing piston has a non-uniform outer diameter along the housing axis.
  • the closing piston according to the invention has at least one piston portion of smaller diameter, at which the closing piston is spaced from a housing axis extending along the housing inner wall of the door closer housing and at least one piston portion of larger diameter, on which the closing piston on the housing inner wall of the door closer housing along the housing axis movable is guided (claim 3).
  • the piston portion of smaller diameter allows due to the between this piston portion and the housing inner wall of the door closer housing existing game the desired tilting movement of the closing piston relative to the door closer housing.
  • the larger-diameter piston section ensures effective guidance of the closing piston during movements along the housing axis. In contact with the inner wall of the door closer housing is only the radially expanded portion of the closing piston. Only this piston section must therefore have good sliding properties. For the diameter or the reduced diameter piston sections good sliding properties are dispensable. Thus, it is unnecessary to grind and harden the or the reduced-diameter closing piston sections, for example, with steel closing pistons.
  • the non-uniform outer diameter of the closing piston is realized in a preferred embodiment of the invention by a gradation of the piston outer diameter.
  • a smaller diameter piston portion is provided only on the side of the larger diameter piston portion facing the bearing roller, or on both sides of the larger diameter piston portion, so that the normally open piston can perform a tilting movement as required.
  • the closing piston is in several parts.
  • a piston main body forms the piston portion of smaller diameter, a piston attached to the piston body radial piston extension the piston portion of larger diameter.
  • the multi-part design of the closer piston offers the advantage that each of the piston parts can be matched in its nature to the specific requirements.
  • claim 6 provides that the piston section larger diameter of the closing piston on the side facing the housing inner wall side of a friction-reducing material.
  • a material can be selected which has no special sliding properties, but which is particularly suitable, for example, to absorb the forces acting between the closer piston and the closer shaft forces.
  • Claim 7 relates to a particularly practice-relevant design of the door closer according to the invention.
  • a closing spring and accordingly a closing piston as a spring piston are provided as closing force.
  • a door closer 1 comprises a closer shaft 2 with a Hubkurvenin 3 formed thereon, a closing piston 4 with a rotatably mounted thereon bearing roller 5, a closing spring 6 and a in FIG. 3 dashed lines indicated door closer housing. 7
  • the closer shaft 2 is rotatable about a shaft rotation axis 8 and otherwise stored without clearance on the door closer housing 7.
  • the Hubkurvenement 3 on the closer shaft 2 has a control surface 9, which extends parallel to the shaft rotation axis 8.
  • the bearing roller 5 is rotatable on the closing piston 4 about a roller rotation axis 10 and forms a bearing surface 11 at its periphery. Incidentally, the connection between the bearing roller 5 and the closing piston 4 is free of play.
  • the closing piston 4 is arranged in the interior of the door closer housing 7 along a housing axis 12 laterally next to the closer shaft 2 and along the Genzoseachse 12 slidably. At the side remote from the closer shaft 2, the closing piston 4 is moved in the direction of the lifting cam 3 of the closer shaft 2 by the closing spring 6 acting as closing force generator (arrow 13 in FIG. 3 ).
  • the outer diameter of the closing piston 4 is stepped. On both sides of a piston portion 14 of larger diameter piston portions 15, 16 of smaller diameter are provided.
  • the Kolbenabschitt 14 of larger diameter is formed by means of a designed as a sliding ring piston ring 17 which is inserted into a circumferential groove 18 on a piston body 19 of the closing piston 4.
  • the closing piston 4 On the piston ring 17, the closing piston 4 has, in the illustrated example case, an outer diameter of 34 mm corresponding to the inner diameter of the hollow-cylindrical door closer housing 7.
  • the opposite the piston portion 14 diameter-reduced piston portions 15, 16 on both sides of the piston ring 17 have a diameter of 33.7 mm and 33.5 mm. Accordingly, the closing piston 4 is only at the piston portion 14 with the inner wall of the door closer housing 7 in contact.
  • the door closer 1 is mounted in the usual manner on a door, not shown, and connected to the closer shaft 2 via a likewise not shown rods of conventional design to a fixed door frame.
  • the FIGS. 1 to 4 show the conditions on the door closer 1 with the door closed.
  • the actual conditions on the door closer 1 may differ, for example as a result of manufacturing and / or assembly tolerances. It is conceivable in particular an undesirable inclination of the closer shaft 2, as in FIG. 4 is sketched heavily overdrawn.
  • an in FIG. 4 dashed lines indicated point contact of the bearing roller side bearing surface 11 and the closing shaft-side control surface 9.
  • a deterioration in the efficiency of the door closer 1 would also result from the fact that the point of mutual support of Hubkurvenement 3 and the bearing roller 5 with respect to a in FIG. 4 also indicated by dashed lines longitudinal center plane 22 of the door closer 1 would be offset relatively far.
  • the longitudinal center plane 22 of the door closer 1 extends in FIG. 2 perpendicular to the plane of the drawing along the housing axis 12.
  • the bearing surface 11 of the locking piston 4 rotatably mounted on the bearing roller 5 can adjust their orientation in the support plane 21 to the orientation of the control surface 9 of the Hubkurvenement 3. Regardless of the inclination of the closer shaft 2 thus results in the support plane 21 line contact between the bearing surface 11 of the bearing roller 5 and the control surface 9 Hubkurvenement 3.
  • the occurring in the operation of the door closer 1 on the bearing surface and the control surface 9 wear is minimized acting on the closing piston 4 tilting moment is compared to the conditions in the in FIG. 4 Dashed lines indicated orientation of the bearing roller 5 significantly reduced.
  • the closing piston 4 is in contact exclusively with the piston ring 17 with the inner wall of the door closer housing 7.
  • the movements carried out by the closing piston 4 against the action of the closing spring 6 and also the movements of the closing piston 4 due to the action of the closing spring 6 along the housing axis 12 are subject to only a slight friction

Description

Die Erfindung betrifft einen Türschließer

  • mit einem Türschließergehäuse,
  • mit einer Schließerwelle, die an dem Türschließergehäuse um eine Wellendrehachse drehbar gelagert ist und die im Innern des Türschließergehäuses mit einer Hubkurvenscheibe versehen ist, die ihrerseits eine sich längs der Wellendrehachse der Schließerwelle erstreckende Steuerfläche aufweist,
  • mit einem Schließerkolben, der in dem Türschließergehäuse längs einer Gehäuseachse, die in Querrichtung der Wellendrehachse der Schließerwelle verläuft, beweglich geführt ist und der längs der Gehäuseachse an einer Seite der Schließerwelle angeordnet ist,
  • mit einem Schließkrafterzeuger, welcher den Schließerkolben längs der Gehäuseachse in Richtung auf die Schließerwelle kraftbeaufschlagt sowie
  • mit einer Lagerrolle, die zwischen dem Schließerkolben und der Schließerwelle angeordnet ist und die um eine längs der Wellendrehachse verlaufende Rollendrehachse drehbar ist und eine sich längs der Rollendrehachse erstreckende Lagerfläche aufweist, wobei der von dem Schließkrafterzeuger in Richtung auf die Schließerwelle kraftbeaufschlagte Schließerkolben in einer Abstützungsebene, die sich längs der Gehäuseachse und längs der Wellendrehachse und der Rollendrehachse erstreckt, über die Lagerfläche der Lagerrolle an der Steuerfläche der an der Schließerwelle vorgesehenen Hubkurvenscheibe abgestützt ist.
The invention relates to a door closer
  • with a door closer housing,
  • with a closer shaft, which is rotatably mounted on the door closer housing about a shaft rotation axis and which is provided in the interior of the door closer housing with a Hubkurvenscheibe, which in turn has a along the shaft rotation axis of the closer shaft extending control surface,
  • with a closing piston, which is movably guided in the door closer housing along a housing axis, which runs in the transverse direction of the shaft rotation axis of the closer shaft, and which is arranged along the housing axis on one side of the closer shaft,
  • with a closing force generator, which forces the closing piston along the housing axis in the direction of the closer shaft and
  • with a bearing roller which is arranged between the closing piston and the closer shaft and which is rotatable about a roller rotational axis running along the shaft rotational axis and has a longitudinal axis of rotation of the roller bearing surface, wherein the closing force of the closing force generator toward the closer shaft in a support plane, which extends along the axis of the housing and along the shaft rotation axis and the roller rotation axis, over the bearing surface the bearing roller is supported on the control surface of the Hubkurvenscheibe provided on the closer shaft.

Türschließer der vorstehenden Art sind beispielsweise als Obentürschließer gebräuchlich. Ein gattungsgemäßer Obentürschließer ist in DE 10 2004 041 358 A1 offenbart.Door closers of the above type are common, for example, as overhead door closer. A generic overhead door closer is in DE 10 2004 041 358 A1 disclosed.

Zum selbsttätigen Schließen eines mit dem vorbekannten Türschließer ausgerüsteten Türflügels überträgt eine Schließerwelle die von einer Schließerfeder generierte Schließkraft auf den zu schließenden Türflügel. Die Schließkraft wird beim Öffnen des sich danach selbsttätig schließenden Türflügels aufgebaut. Im Kraftfluss zwischen der Schließerfeder und der Schließerwelle ist im Innern eines Türschließergehäuses ein Schließerkolben angeordnet, der sich beim Öffnen und Schließen des Türflügels längs einer Gehäuseachse des Türschließergehäuses bewegt. Über eine um eine Rollendrehachse drehbare Lagerrolle ist der Schließerkolben an einer Hubkurvenscheibe der Schließerwelle abgestützt. Dabei liegt die Lagerrolle mit einer sich parallel zu der Rollendrehachse erstreckenden Lagerfläche an einer Steuerfläche der Hubkurvenscheibe an. Die Steuerfläche der Hubkurvenscheibe verläuft parallel zu einer Wellendrehachse, um welche die mit der Hubkurvenscheibe versehene Schließerwelle drehbar ist. Zum selbsttätigen Schließen des Türflügels wird die Hubkurvenscheibe an der Schließerwelle von der Schließerfeder über den Schließerkolben und die zwischen dem Schließerkolben und der Hubkurvenscheibe vorgesehene Lagerrolle mit der Schließkraft beaufschlagt. In Folge der Kraftbeaufschlagung der Hubkurvenscheibe führt die Schließerwelle eine Drehbewegung aus, die beispielsweise über ein Gestänge in eine Schließbewegung des Türflügels umgesetzt wird. Aufgrund einer mit dem Öffnen des Türflügels verbundenen Drehung der Schließerwelle treibt die an der Schließerwelle angebrachte Hubkurvenscheibe die sie beaufschlagende Lagerrolle und über diese den Schließerkolben gegen die Wirkung einer von der Schließerfeder ausgeübten Rückstellkraft längs der Gehäuseachse des Türschließergehäuses an. Sowohl beim Schließen als auch beim Öffnen des Türflügels rollen die Steuerfläche an der Hubkurvenscheibe und die Lagerfläche an der Lagerrolle aufeinander ab.For automatically closing a door leaf equipped with the known door closer, a closer shaft transmits the closing force generated by a closing spring to the door leaf to be closed. The closing force is built up when opening the then automatically closing door leaf. In the power flow between the closing spring and the closer shaft, a closing piston is arranged in the interior of a door closer housing, which moves when opening and closing the door leaf along a housing axis of the door closer housing. About a pivotable about a roller rotation axis bearing roller of the closing piston is supported on a Hubkurvenscheibe the closer shaft. In this case, the bearing roller is located on a control surface of the Hubkurvenscheibe with a parallel to the roller rotation axis extending bearing surface. The control surface of the Hubkurvenscheibe runs parallel to a shaft rotation axis about which the Hubkurvenscheibe provided with the closer shaft is rotatable. For automatically closing the door leaf, the Hubkurvenscheibe is applied to the closer shaft of the shutter spring on the closing piston and provided between the closing piston and the Hubkurvenscheibe bearing roller with the closing force. As a result of the application of force to the lifting cam disk, the closer shaft performs a rotary movement, which is converted, for example, via a linkage into a closing movement of the door leaf. Due to a connected to the opening of the door leaf rotation of the closer shaft mounted on the closer shaft Hubkurvenscheibe drives them acting on the bearing roller and on this the closing piston against the action of a force exerted by the closing spring restoring force along the housing axis of the door closer housing. Both when closing and when opening the door, the control surface roll on the Hubkurvenscheibe and the bearing surface on the bearing roller from each other.

Beim Schließen und auch beim Öffnen des mit dem Türschließer ausgerüsteten Türflügels werden zwischen der Hubkurvenscheibe der Schließerwelle und der dem Schließerkolben zugeordneten Lagerrolle große Kräfte übertragen. Sind die Hubkurvenscheibe und die Lagerrolle beispielsweise aufgrund von Montage- und/ oder Fertigungstoleranzen nicht optimal gegeneinander ausgerichtet, so ist der Betrieb des Türschließers mit einem übermäßigen Verschleiß an der Steuerfläche der Hubkurvenscheibe und der Lagerfläche der Lagerrolle verbunden. Der übermäßige Verschleiß beeinträchtigt den Wirkungsgrad des Türschließers. Eine Beeinträchtigung des Türschließer-Wirkungsgrades ergibt sich zudem deshalb, weil bei einer Fehlausrichtung der Hubkurvenscheibe und/oder der Lagerrolle bei der Kraftübertragung zwischen der Hubkurvenscheibe und der Lagerrolle auf den Schließerkolben ein Kippmoment wirkt, aufgrund dessen sich die Reibung erhöht, die bei den Bewegungen des Schließerkolbens längs der Gehäuseachse zwischen dem Schließerkolben und der diesen führenden Innenwand des Türschließergehäuses auftritt.When closing and also when opening the door closer equipped with the door leaf large forces are transmitted between the Hubkurvenscheibe the closer shaft and the closing piston associated bearing roller. If the Hubkurvenscheibe and the bearing roller, for example, due to assembly and / or manufacturing tolerances not optimally aligned with each other, the operation of the door closer is associated with excessive wear on the control surface of Hubkurvenscheibe and the bearing surface of the bearing roller. The excessive wear affects the efficiency of the door closer. An impairment of the door closer efficiency is also due to the fact that in a misalignment of the Hubkurvenscheibe and / or the bearing roller in the power transmission between the Hubkurvenscheibe and the bearing roller on the closer piston a tilting moment acts, due to which increases the friction, which in the movements of the Closing piston along the housing axis between the closing piston and this leading inner wall of the door closer housing occurs.

Aus der GB 2462633 A ist ebenfalls ein gattungsgemäßer Türschließer bekannt.From the GB 2462633 A is also a generic door closer known.

Den beschriebenen Nachteilen des Standes der Technik abzuhelfen, ist Aufgabe der vorliegenden Erfindung.
Erfindungsgemäß gelöst wird diese Aufgabe durch den Türschließer gemäß Patentanspruch 1.
Eine optimale Kraftübertragung zwischen der an der Schließerwelle vorgesehenen Hubkurvenscheibe und der schließerkolbenseitigen Lagerrolle ergibt sich, wenn die um die Wellendrehachse gekrümmte Steuerfläche der Hubkurvenscheibe und die um die Rollendrehachse gekrümmte Lagerfläche der Lagerrolle in einer längs der Wellen- und der Rollendrehachse verlaufenden Abstützungsebene mit gegenseitiger Linienberührung aneinander anliegen. Eine gegenseitige Linienberührung der Steuerfläche an der Hubkurvenscheibe und der Lagerfläche an der Lagerrolle stellt sich dann ein, wenn sowohl die parallel zu der Steuerfläche der Hubkurvenscheibe verlaufende Wellendrehachse als auch die zu der Lagerfläche der Lagerrolle parallele Rollendrehachse parallel zueinander verlaufen. Damit dies auch bei Fertigungs- und/oder Montagetoleranzen an der Schließerwelle und/oder an der Lagerrolle und einer damit verbundenen Fehlausrichtung der Steuerfläche der Hubkurvenscheibe und/oder der Lagerfläche der Lagerrolle gewährleistet ist, besteht im Falle der Erfindung in der Ebene der gegenseitigen Abstützung der Hubkurvenscheibe und der Lagerrolle eine Kippbeweglichkeit der an der Hubkurvenscheibe vorgesehenen Steuerfläche und/oder ein Kippbeweglichkeit der Lagerfläche der Lagerrolle. Aufgrund der Kippbeweglichkeit werden die Steuerfläche der Hubkurvenscheibe und/oder die Lagerfläche der Lagerrolle in die Lage versetzt, sich gegenüber der jeweils anderen Fläche unter der Wirkung der längs der Gehäuseachse des Türschließergehäuses wirkenden Kraft selbsttätig derart auszurichten, dass sich die Steuerfläche der Hubkurvenscheiben und die Lagerfläche der Lagerrolle in der Abstützungsebene linienförmig berühren. Es wird dementsprechend verhindert, dass sich aufgrund einer Fehlausrichtung der Steuerfläche der Hubkurvenscheibe und/oder der Lagerfläche der Lagerrolle zwischen der Steuerfläche der Hubkurvenscheibe und der Lagerfläche der Lagerrolle anstelle der angestrebten Linienberührung eine unerwünschte Punktberührung in der Abstützungsebene ergibt.To remedy the disadvantages of the prior art described is the object of the present invention.
This object is achieved according to the invention by the door closer according to claim 1.
An optimal power transmission between the provided on the closer shaft Hubkurvenscheibe and the Schließerkolbenseitigen bearing roller results when the curved about the shaft rotation axis control surface of Hubkurvenscheibe and curved about the roller rotation axis bearing surface of the bearing roller in a along the shaft and the roller axis of rotation extending support plane with mutual line contact each other issue. A mutual line contact of the control surface on the Hubkurvenscheibe and the bearing surface on the bearing roller turns when both running parallel to the control surface of the Hubkurvenscheibe shaft rotation axis and parallel to the bearing surface of the bearing roller roller rotation axis. So that this also in manufacturing and / or assembly tolerances on the closer shaft and / or on the bearing roller and an associated misalignment of the Control surface of Hubkurvenscheibe and / or the bearing surface of the bearing roller is ensured, in the case of the invention in the plane of mutual support of Hubkurvenscheibe and the bearing roller Kippbeweglichkeit provided on the Hubkurvenscheibe control surface and / or a Kippbeweglichkeit the bearing surface of the bearing roller. Due to the Kippbeweglichkeit the control surface of the Hubkurvenscheibe and / or the bearing surface of the bearing roller are enabled to automatically align with respect to the other surface under the action of the force acting along the housing axis of the door closer housing force such that the control surface of Hubkurvenscheiben and the bearing surface line contact the bearing roller in the support plane. It is accordingly prevented that due to a misalignment of the control surface of the Hubkurvenscheibe and / or the bearing surface of the bearing roller between the control surface of Hubkurvenscheibe and the bearing surface of the bearing roller instead of the desired line contact results in an undesirable point contact in the support plane.

In Folge der Linienberührung unterliegen die bei der Betätigung des Türschließers aufeinander abrollenden Flächen an der Hubkurvenscheibe und der Lagerrolle einem allenfalls minimalen Verschleiß. Ist die zwischen der Hubkurvenscheibe und der Lagerrolle übertragene Kraft in einer senkrecht zu der Abstützungsebene verlaufenden Längsmittelebene des Türschließers wirksam, so wird durch die selbsttätige gegenseitige Ausrichtung der Steuerfläche der Hubkurvenscheibe und der Lagerfläche der Lagerrolle ein Versatz des Ortes der Kraftübertragung zwischen der Hubkurvenscheibe und der Lagerrolle gegenüber der Längsmittelebene des Türschließers verglichen mit einer gegenseitigen Punktberührung zumindest reduziert. Damit verbunden ist eine Verkleinerung des Kippmomentes, das in Folge des Versatzes des Ortes der Kraftübertragung zwischen der Hubkurvenscheibe und der Lagerrolle gegenüber der Längsmittelebene des Türschließers auf den Schließerkolben wirkt und das bestrebt ist, den Schließerkolben unter Erhöhung der zwischen dem Schließerkolben und der diesen führenden Innenwand des Türschließergehäuses auftretenden Reibung gegenüber dem Türschließergehäuse zu verkanten.As a result of the line contact subject to the actuation of the door closer rolling surfaces on the Hubkurvenscheibe and the bearing roller at most minimal wear. If the force transmitted between the cam disc and the bearing roller is effective in a plane perpendicular to the support plane longitudinal center plane of the door closer, so by the automatic mutual alignment of the control surface of Hubkurvenscheibe and the bearing surface of the bearing roller offset the location of the power transmission between the Hubkurvenscheibe and the bearing roller compared with the longitudinal center plane of the door closer compared to a mutual point contact at least reduced. This is associated with a reduction of the tilting moment, which acts as a result of the offset of the location of the power transmission between the Hubkurvenscheibe and the bearing roller relative to the longitudinal center plane of the door closer to the closing piston and which endeavors to increase the closing piston between the closing piston and this inner wall of the door closer housing occurring friction with respect to the door closer housing to tilt.

Aufgrund der genannten Effekte der Linienberührung von Hubkurvenscheibe und Lagerrolle besitzt der erfindungsgemäße Türschließer einen besonders hohen Wirkungsgrad. Der Kraftaufwand zum Öffnen des betreffenden Türflügels ist vergleichsweise gering. Die schließkrafterzeugenden und auch die schließkraftübertragenden Türschließerkomponenten können verhältnismäßig klein bauen. Der Materialeinsatz bei der Herstellung des erfindungsgemäßen Türschließers ist relativ gering, die Herstellungskosten sind relativ niedrig.Due to the mentioned effects of line contact of Hubkurvenscheibe and bearing roller of the door closer according to the invention has a particularly high efficiency. The force required to open the relevant door leaf is comparatively low. The closing force-generating and also the closing force-transmitting door closer components can build relatively small. The material used in the production of the door closer according to the invention is relatively low, the production costs are relatively low.

Besondere Ausführungsarten des Türschließers gemäß Patentanspruch 1 ergeben sich aus den abhängigen Patentansprüchen 2 bis 7.Particular embodiments of the door closer according to claim 1 emerge from the dependent claims 2 to 7.

Damit die Schließerwelle an dem Türschließergehäuse derart gelagert werden kann, dass Kippbewegungen der Schließerwelle gegenüber dem Türschließergehäuse ausgeschlossen sind, ist die zur selbsttätigen gegenseitigen Ausrichtung der Hubkurvenscheibe und der Lagerrolle erforderliche Kippbeweglichkeit in bevorzugter Ausgestaltung der Erfindung lagerrollenseitig vorgesehen. Zu diesem Zweck ist ausweislich Patentanspruch 2 die Lagerrolle in Richtung der Kippbeweglichkeit der Lagerfläche der Lagerrolle im Wesentlichen spielfrei an dem Schließerkolben abgestützt und der Schließerkolben relativ zu dem Türschließergehäuse kippbeweglich.Thus, the closer shaft can be mounted on the door closer housing such that tilting movements of the closer shaft are excluded relative to the door closer housing, the required for automatic mutual alignment of Hubkurvenscheibe and the bearing roller tilting mobility is provided in a preferred embodiment of the invention bearing roller side. For this purpose, it is evidenced in claim 2, the bearing roller in the direction of Kippbeweglichkeit the bearing surface of the bearing roller supported substantially free of play on the closing piston and the closing piston relative to the door closer housing tiltable.

Eine derartige Kippbeweglichkeit des Schließerkolbens besteht an herkömmlichen Türschließern, an denen der Schließerkolben bei Bewegungen längs der Gehäuseachse über eine Passung an dem Türschließergehäuse linear geführt ist, nicht. Im Falle der Erfindung wird die Kippbeweglichkeit des Schließerkolbens relativ zu dem Türschließergehäuse dadurch ermöglicht, dass der Schließerkolben längs der Gehäuseachse einen uneinheitlichen Außendurchmesser besitzt. Der erfindungsgemäße Schließerkolben weist wenigstens einen Kolbenabschnitt kleineren Durchmessers, an welchem der Schließerkolben von einer längs der Gehäuseachse verlaufenden Gehäuse-Innenwand des Türschließergehäuses beabstandet ist sowie wenigstens einen Kolbenabschnitt größeren Durchmessers auf, an welchem der Schließerkolben an der Gehäuse-Innenwand des Türschließergehäuses längs der Gehäuseachse beweglich geführt ist (Patentanspruch 3). Der Kolbenabschnitt kleineren Durchmessers ermöglicht aufgrund des zwischen diesem Kolbenabschnitt und der Gehäuse-Innenwand des Türschließergehäuses bestehenden Spiels die gewünschte Kippbewegung des Schließerkolbens gegenüber dem Türschließergehäuse. Gleichzeitig sorgt der Kolbenabschnitt größeren Durchmessers für eine wirksame Führung des Schließerkolbens bei Bewegungen längs der Gehäuseachse. In Kontakt mit der Innenwand des Türschließergehäuses ist lediglich der radial erweiterte Abschnitt des Schließerkolbens. Nur dieser Kolbenabschnitt muss daher gute Gleiteigenschaften besitzen. Für den oder die durchmesserreduzierten Kolbenabschnitte sind gute Gleiteigenschaften verzichtbar. Etwa bei Schließerkolben aus Stahl erübrigt sich daher ein Schleifen und Härten des oder der durchmesserreduzierten Schließerkolbenabschnitte.Such a tilting movement of the closing piston does not exist on conventional door closers, on which the closing piston is linearly guided during movements along the housing axis via a fit on the door closer housing. In the case of the invention, the tilting movement of the closing piston relative to the door closer housing is made possible by the fact that the closing piston has a non-uniform outer diameter along the housing axis. The closing piston according to the invention has at least one piston portion of smaller diameter, at which the closing piston is spaced from a housing axis extending along the housing inner wall of the door closer housing and at least one piston portion of larger diameter, on which the closing piston on the housing inner wall of the door closer housing along the housing axis movable is guided (claim 3). The piston portion of smaller diameter allows due to the between this piston portion and the housing inner wall of the door closer housing existing game the desired tilting movement of the closing piston relative to the door closer housing. At the same time, the larger-diameter piston section ensures effective guidance of the closing piston during movements along the housing axis. In contact with the inner wall of the door closer housing is only the radially expanded portion of the closing piston. Only this piston section must therefore have good sliding properties. For the diameter or the reduced diameter piston sections good sliding properties are dispensable. Thus, it is unnecessary to grind and harden the or the reduced-diameter closing piston sections, for example, with steel closing pistons.

Der uneinheitliche Außendurchmesser des Schließerkolbens wird in bevorzugter Ausgestaltung der Erfindung durch eine Abstufung des Kolben-Außendurchmessers realisiert. In Abhängigkeit von der Lage des Kolbenabschnitts größeren Durchmessers längs der Gehäuseachse ist ein Kolbenabschnitt kleineren Durchmessers lediglich an der zu der Lagerrolle hin liegenden Seite des Kolbenabschnitts größeren Durchmessers oder aber beidseits des Kolbenabschnitts größeren Durchmessers vorzusehen, damit der Schließerkolben erforderlichenfalls eine Kippbewegung ausführen kann.The non-uniform outer diameter of the closing piston is realized in a preferred embodiment of the invention by a gradation of the piston outer diameter. Depending on the position of the piston portion of larger diameter along the housing axis, a smaller diameter piston portion is provided only on the side of the larger diameter piston portion facing the bearing roller, or on both sides of the larger diameter piston portion, so that the normally open piston can perform a tilting movement as required.

Im Falle der Erfindungsbauart gemäß Patentanspruch 4 ist der Schließerkolben mehrteilig. Ein Kolbengrundkörper bildet den Kolbenabschnitt kleineren Durchmessers, eine an dem Kolbengrundkörper angebrachte radiale Kolbenerweiterung den Kolbenabschnitt größeren Durchmessers.In the case of Erfindungsbauart according to claim 4, the closing piston is in several parts. A piston main body forms the piston portion of smaller diameter, a piston attached to the piston body radial piston extension the piston portion of larger diameter.

Ausweislich Patentanspruch 5 ist als radiale Kolbenerweiterung ein an dem Kofbengrundkörper angebrachter Kolbenring vorgesehen. Derartige Kolbenringe sind handelsüblich und lassen sich auf fertigungstechnisch einfache Art und Weise mit dem Kolbengrundkörper verbinden, beispielsweise in eine Umfangsnut des Kolbengrundkörpers einlegen.Evidently claim 5 is provided as a radial piston extension attached to the Kofbengrundkörper piston ring. Such piston rings are commercially available and can be connected to manufacturing technology simple way with the piston body, insert for example in a circumferential groove of the piston body.

Die Mehrteiligkeit des Schließerkolbens bietet den Vorteil, dass jeder der Kolbenteile in seiner Beschaffenheit auf die spezifischen Anforderungen abgestimmt werden kann. In diesem Sinne sieht Patentanspruch 6 vor, dass der Kolbenabschnitt größeren Durchmessers des Schließerkolbens an der zu der Gehäuse-Innenwand hinweisenden Seite aus einem reibungsvermindernden Material besteht. Für den Kolbengrundkörper kann ein Werkstoff gewählt werden, der keine besonderen Gleiteigenschaften besitzt, der beispielsweise aber in besonderem Maße geeignet ist, die zwischen dem Schließerkolben und der Schließerwelle wirkenden Kräfte aufzunehmen.The multi-part design of the closer piston offers the advantage that each of the piston parts can be matched in its nature to the specific requirements. In this sense, claim 6 provides that the piston section larger diameter of the closing piston on the side facing the housing inner wall side of a friction-reducing material. For the piston body, a material can be selected which has no special sliding properties, but which is particularly suitable, for example, to absorb the forces acting between the closer piston and the closer shaft forces.

Patentanspruch 7 betrifft eine besonders praxisrelevante Bauart des erfindungsgemäßen Türschließers. In diesem Fall sind als Schließkrafterzeuger eine Schließerfeder und dementsprechend als Schließerkolben ein Federkolben vorgesehen.Claim 7 relates to a particularly practice-relevant design of the door closer according to the invention. In this case, a closing spring and accordingly a closing piston as a spring piston are provided as closing force.

Nachfolgend wird die Erfindung anhand beispielhafter schematischer Darstellungen näher erläutert. Es zeigen:

Figur 1
eine perspektivische Teildarstellung eines Türschließers,
Figur 2
die Anordnung gemäß Figur 1 in der Ansicht in Richtung des Pfeils II in Figur 1,
Figur 3
die Anordnung gemäß den Figuren 1 und 2 in einer in Figur 2 senkrecht zu der Zeichenebene entlang der Linie III-III verlaufenden Darstellungsebene und
Figur 4
das Detail IV von Figur 3 in einer stark vergrößerten und stark überzeichneten Schnittdarstellung mit einer Schnittebene, die in Figur 3 senkrecht zu der Zeichenebene entlang der gestrichelten Gehäuseachse des Türschließergehäuses verläuft.
The invention will be explained in more detail below with reference to exemplary schematic illustrations. Show it:
FIG. 1
a partial perspective view of a door closer,
FIG. 2
the arrangement according to FIG. 1 in the view in the direction of the arrow II in FIG. 1 .
FIG. 3
the arrangement according to the Figures 1 and 2 in an in FIG. 2 perpendicular to the plane of the drawing along the line III-III extending plane and
FIG. 4
the detail IV of FIG. 3 in a greatly enlarged and heavily oversubscribed sectional view with a sectional plane in FIG. 3 runs perpendicular to the plane along the dashed housing axis of the door closer housing.

Gemäß den Figuren 1 bis 3 umfasst ein Türschließer 1 eine Schließerwelle 2 mit einer daran angeformten Hubkurvenscheibe 3, einen Schließerkolben 4 mit einer daran drehbar gelagerten Lagerrolle 5, eine Schließerfeder 6 sowie ein in Figur 3 gestrichelt angedeutetes Türschließergehäuse 7.According to the FIGS. 1 to 3 a door closer 1 comprises a closer shaft 2 with a Hubkurvenscheibe 3 formed thereon, a closing piston 4 with a rotatably mounted thereon bearing roller 5, a closing spring 6 and a in FIG. 3 dashed lines indicated door closer housing. 7

Die Schließerwelle 2 ist um eine Wellendrehachse 8 drehbar und ansonsten spielfrei an dem Türschließergehäuse 7 gelagert. Die Hubkurvenscheibe 3 an der Schließerwelle 2 weist eine Steuerfläche 9 auf, die sich parallel zu der Wellendrehachse 8 erstreckt.The closer shaft 2 is rotatable about a shaft rotation axis 8 and otherwise stored without clearance on the door closer housing 7. The Hubkurvenscheibe 3 on the closer shaft 2 has a control surface 9, which extends parallel to the shaft rotation axis 8.

Die Lagerrolle 5 ist an dem Schließerkolben 4 um eine Rollendrehachse 10 drehbar und bildet an ihrem Umfang eine Lagerfläche 11 aus. Im Übrigen ist die Verbindung zwischen der Lagerrolle 5 und dem Schließerkolben 4 spielfrei.The bearing roller 5 is rotatable on the closing piston 4 about a roller rotation axis 10 and forms a bearing surface 11 at its periphery. Incidentally, the connection between the bearing roller 5 and the closing piston 4 is free of play.

Der Schließerkolben 4 ist im Innern des Türschließergehäuses 7 längs einer Gehäuseachse 12 seitlich neben der Schließerwelle 2 angeordnet und längs der Gehäseachse 12 verschieblich. An der von der Schließerwelle 2 abliegenden Seite wird der Schließerkolben 4 durch die als Schließkrafterzeuger dienende Schließerfeder 6 in Richtung auf die Hubkurvenscheibe 3 der Schließerwelle 2 (Pfeil 13 in Figur 3) kraftbeaufschlagt.The closing piston 4 is arranged in the interior of the door closer housing 7 along a housing axis 12 laterally next to the closer shaft 2 and along the Gehäseachse 12 slidably. At the side remote from the closer shaft 2, the closing piston 4 is moved in the direction of the lifting cam 3 of the closer shaft 2 by the closing spring 6 acting as closing force generator (arrow 13 in FIG FIG. 3 ).

Längs der Gehäuseachse 12 ist der Außendurchmesser des Schließerkolbens 4 abgestuft. Beidseits eines Kolbenabschnitts 14 größeren Durchmessers sind Kolbenabschnitte 15, 16 kleineren Durchmessers vorgesehen. Der Kolbenabschitt 14 größeren Durchmessers wird mittels eines als Gleitring ausgeführten Kolbenrings 17 ausgebildet, der in eine Umfangsnut 18 an einem Kolbengrundkörper 19 des Schließerkolbens 4 eingelegt ist. An dem Kolbenring 17 besitzt der Schließerkolben 4 in dem dargestellten Beispielsfall einen dem Innendurchmesser des hohlzylindrischen Türschließergehäuses 7 entsprechenden Außendurchmesser von 34 mm. Die gegenüber dem Kolbenabschnitt 14 durchmesserreduzierten Kolbenabschnitte 15, 16 beidseits des Kolbenrings 17 weisen einen Durchmesser von 33,7 mm und von 33,5 mm auf. Dementsprechend befindet sich der Schließerkolben 4 nur an dem Kolbenabschnitt 14 mit der Innenwand des Türschließergehäuses 7 in Kontakt.Along the housing axis 12, the outer diameter of the closing piston 4 is stepped. On both sides of a piston portion 14 of larger diameter piston portions 15, 16 of smaller diameter are provided. The Kolbenabschitt 14 of larger diameter is formed by means of a designed as a sliding ring piston ring 17 which is inserted into a circumferential groove 18 on a piston body 19 of the closing piston 4. On the piston ring 17, the closing piston 4 has, in the illustrated example case, an outer diameter of 34 mm corresponding to the inner diameter of the hollow-cylindrical door closer housing 7. The opposite the piston portion 14 diameter-reduced piston portions 15, 16 on both sides of the piston ring 17 have a diameter of 33.7 mm and 33.5 mm. Accordingly, the closing piston 4 is only at the piston portion 14 with the inner wall of the door closer housing 7 in contact.

Der Türschließer 1 ist in gewohnter Weise an einem nicht dargestellten Türflügel montiert und an der Schließerwelle 2 über ein gleichfalls nicht gezeigtes Gestänge herkömmlicher Bauart an einen feststehenden Türrahmen angebunden. Die Figuren 1 bis 4 zeigen die Verhältnisse an dem Türschließer 1 bei geschlossenem Türflügel.The door closer 1 is mounted in the usual manner on a door, not shown, and connected to the closer shaft 2 via a likewise not shown rods of conventional design to a fixed door frame. The FIGS. 1 to 4 show the conditions on the door closer 1 with the door closed.

Wird der Türflügel drehgeöffnet, so führt die über das Gestänge mit dem festen Türrahmen verbundene Schließerwelle 2 gemeinschaftlich mit der daran angeformten Hubkurvenscheibe 3 eine Drehbewegung in einer Öffnungsrichtung 20 aus (Figur 3). Infolgedessen rollen die Steuerfläche 9 der Hubkurvenscheibe 3 und die Lagerfläche 11 der Lagerrolle 5 aufeinander ab und der Schließerkolben 4 im Innern des Türschließergehäuses 7 verlagert sich längs der Gehäuseachse 12 gegen die Wirkung der ihn beaufschlagenden Schließerfeder 6 in Figur 3 nach rechts. Die Schließerfeder 6 wird aufgrund der Bewegung des Schließerkolbens 4 vorgespannt.If the door leaf is turned open, the closer to the fixed door frame via the linkage shaft 2 performs jointly with the molded thereon Hubkurvenscheibe 3 a rotational movement in an opening direction 20 ( FIG. 3 ). As a result, the control surface 9 of Hubkurvenscheibe 3 and the bearing surface 11 of the bearing roller 5 roll from each other and the closer piston 4 in the interior of the door closer housing 7 displaced along the housing axis 12 against the action of him acting on the closing spring 6 in FIG. 3 to the right. The closing spring 6 is biased due to the movement of the closing piston 4.

Wird der Türflügel nach dem Öffnen freigegeben, so kann sich die Schließerfeder 6 entspannen. In Folge der Kraftbeaufschlagung durch die Schließerfeder 6 bewegt sich der Schließerkolben 4 längs der Gehäuseachse 12 zurück in die Position gemäß Figur 3. Die von der Schließerfeder 6 in Richtung des Pfeils 13 ausgeübte Schließkraft wird dabei über die an dem Schließerkolben 4 drehbar gelagerte Lagerrolle 5 in die Hubkurvenscheibe 3 der Schließerwelle 2 abgetragen und bewirkt dadurch eine der Öffnungsrichtung 20 entgegengerichtete Schließ-Drehbewegung der Hubkurvenscheibe 3 und der Schließerwelle 2. Über das Gestänge zwischen der Schließerwelle 2 und dem feststehenden Türrahmen wird die Schließ-Drehbewegung der Schließerwelle 2 in eine Schließbewegung des mit dem Türschließer 1 versehenen Türflügels umgesetzt. Aufgrund der Geometrie der Hubkurvenscheibe 3 bzw. der an dieser vorgesehenen Steuerfläche 9 variieren die zum Öffnen des Türflügels aufzubringende Kraft und die beim Schließen des Türflügels auf diesen ausgeübte Kraft in der gewünschten Weise über den Öffnungswinkel des Türflügels.If the door is released after opening, then the closing spring 6 can relax. As a result of the application of force by the closing spring 6, the closing piston 4 moves along the housing axis 12 back into the position according to FIG. 3 , The force exerted by the closing spring 6 in the direction of arrow 13 closing force is removed via the rotatably mounted on the lock piston 4 bearing roller 5 in the Hubkurvenscheibe 3 of the closer shaft 2 and thereby causes an opening direction 20 opposite closing rotational movement of the Hubkurvenscheibe 3 and the closer shaft. 2 Over the linkage between the closer shaft 2 and the fixed door frame, the closing rotational movement of the closer shaft 2 is converted into a closing movement of the door leaf provided with the door closer 1. Due to the geometry of the Hubkurvenscheibe 3 and provided on this control surface 9 vary the force applied to open the door leaf and the force exerted upon closing the door leaf on this force in the desired manner on the opening angle of the door leaf.

Für die Kraftübertragung zwischen der Lagerrolle 5 an dem Schließerkolben 4 und der Hubkurvenscheibe 3 an der Schließerwelle 2 bestehen dann optimale Bedingungen, wenn die um die Rollendrehachse 10 gekrümmte Lagerfläche 11 der Lagerrolle 5 und die um die Wellendrehachse 8 gekrümmte Steuerfläche 9 der Hubkurvenscheibe 3 in einer Abstützungsebene 21, wie sie in Figur 3 längs der Gehäuseachse 12 senkrecht zu der Zeichenebene verläuft, linienförmig aneinander abgestützt sind. Eine Linienberührung der Lagerfläche 11 an der Lagerrolle 5 und der Steuerfläche 9 an der Hubkurvenscheibe 3 stellt sich dann ein, wenn die Lagerfläche 11 der Lagerrolle 5 parallel zu der Rollendrehachse 10 und die Steuerfläche 9 der Hubkurvenscheibe 3 parallel zu der Wellendrehachse 8 und außerdem die Rollendrehachse 10 und die Wellendrehachse 8 parallel zueinander verlaufen.For the power transmission between the bearing roller 5 on the closing piston 4 and the Hubkurvenscheibe 3 on the closer shaft 2 then optimal conditions exist when the curved about the roller axis 10 bearing surface 11 of the bearing roller 5 and the curved axis of rotation 8 control surface 9 of the cam disc 3 in a Support level 21, as in FIG. 3 along the housing axis 12 extends perpendicular to the plane of the drawing, are linearly supported against each other. A line contact of the bearing surface 11 on the bearing roller 5 and the control surface 9 on the Hubkurvenscheibe 3 turns when the bearing surface 11 of the bearing roller 5 parallel to the roller rotation axis 10 and the control surface 9 Hubkurvenscheibe 3 parallel to the shaft rotation axis 8 and also the roller rotation axis 10 and the shaft rotation axis 8 parallel to each other.

Von derart optimalen Verhältnissen können die tatsächlichen Verhältnisse an dem Türschließer 1 beispielsweise in Folge von Fertigungs- und/oder Montagetoleranzen abweichen. Denkbar ist insbesondere eine unerwünschte Schrägstellung der Schließerwelle 2, wie sie in Figur 4 stark überzeichnet skizziert ist. Besäße in diesem Fall der Schließerkolben 4 einen einheitlichen Außendurchmesser und wäre der Schließerkolben 4 folglich über seine gesamte Länge an der Innenwand des Türschließergehäuses 7 längs der Gehäuseachse 12 geführt, so ergäbe sich in der Abstützungsebene 21 eine in Figur 4 gestrichelt angedeutete Punktberührung der lagerrollenseitigen Lagerfläche 11 und der schließerwellenseitigen Steuerfläche 9. Beim Öffnen und Schließen des Türflügels würden die Hubkurvenscheibe 3 und die Lagerrolle 5 längs einer Berührungslinie aufeinander abrollen. In Folge der auftretenden Kantenpressung wären die Hubkurvenscheibe 3 und die Lagerrolle 5 bei Betrieb des Türschließers 1 einem außerordentlich starken Verschleiß unterworfen. Die Standzeiten der Hubkurvenscheibe 3 und der Lagerrolle 5 würden sich verschleißbedingt gegenüber den optimalen Verhältnissen stark reduzieren, der Wirkungsgrad des Türschließers 1 würde sich verschleißbedingt verschlechtern.From such optimal conditions, the actual conditions on the door closer 1 may differ, for example as a result of manufacturing and / or assembly tolerances. It is conceivable in particular an undesirable inclination of the closer shaft 2, as in FIG. 4 is sketched heavily overdrawn. In this case, if the closing piston 4 had a uniform external diameter and if the closing piston 4 were consequently guided over the entire length thereof on the inner wall of the door closer housing 7 along the housing axis 12, then an in FIG. 4 dashed lines indicated point contact of the bearing roller side bearing surface 11 and the closing shaft-side control surface 9. When opening and closing the door leaf, the Hubkurvenscheibe 3 and the bearing roller 5 along a line of contact would roll on each other. As a result of the edge pressure occurring Hubkurvenscheibe 3 and the bearing roller 5 would be subjected during operation of the door closer 1 an extremely heavy wear. The service life of the Hubkurvenscheibe 3 and the bearing roller 5 would greatly reduce the wear due to the optimal conditions, the efficiency of the door closer 1 would deteriorate due to wear.

Eine Verschlechterung des Wirkungsgrades des Türschließers 1 ergäbe sich zudem dadurch, dass der Punkt der gegenseitigen Abstützung der Hubkurvenscheibe 3 und der Lagerrolle 5 gegenüber einer in Figur 4 ebenfalls gestrichelt angedeuteten Längsmittelebene 22 des Türschließers 1 relativ weit versetzt wäre. Die Längsmittelebene 22 des Türschließers 1 verläuft in Figur 2 senkrecht zu der Zeichenebene entlang der Gehäuseachse 12.A deterioration in the efficiency of the door closer 1 would also result from the fact that the point of mutual support of Hubkurvenscheibe 3 and the bearing roller 5 with respect to a in FIG. 4 also indicated by dashed lines longitudinal center plane 22 of the door closer 1 would be offset relatively far. The longitudinal center plane 22 of the door closer 1 extends in FIG. 2 perpendicular to the plane of the drawing along the housing axis 12.

In Folge des großen Versatzes des Kontaktpunktes der Hubkurvenscheibe 3 und der Lagerrolle 5 gegenüber der Längsmittelebene 22 des Türschließers 1 würde auf den Schließerkolben 4 ein betragsmäßig großes Kippmoment wirken, das bestrebt wäre, den Schließerkolben 4 gegenüber der Innenwand des Türschließergehäuses 7 zu verkanten. In Figur 4 ist das Kippmoment durch einen Pfeil 23 veranschaulicht.As a result of the large offset of the contact point of Hubkurvenscheibe 3 and the bearing roller 5 with respect to the longitudinal center plane 22 of the door closer 1 would act on the closing piston 4 a magnitude large tilting moment, which would endeavor to tilt the closing piston 4 relative to the inner wall of the door closer housing 7. In FIG. 4 the tilting moment is illustrated by an arrow 23.

Die beschriebenen negativen Auswirkungen einer unerwünschten Fehlausrichtung der Schließerwelle 2 und somit auch der Wellendrehachse 8 stellen sich an dem Türschließer 1 gemäß den Figuren 1 bis 4 aufgrund der besonderen Gestaltung des Schließerkolbens 4 nicht ein. Vielmehr erlaubt die Abstufung des Außendurchmessers des Schließerkolbens 4 eine Kippbewegung des Schließerkolbens 4 in der Abstützungsebene, ohne dass damit eine Reibungserhöhung an der Kontaktfläche zwischen dem Schließerkolben 4 und der Innenwand des Türschließergehäuses 7 verbunden wäre. Da die Erstreckung des Kolbenrings 17 an dem Schließerkolben 4 längs der Gehäuseachse 12 verhältnismäßig klein bemessen ist und da der Kolbenring 17 nahe dem zu der Schließerfeder 6 hin gelegenen Ende des Schließerkolbens 4 angeordnet ist und eine gewisse Elastizität aufweist, kann der Schließerkolben 4 gegenüber der Innenwand des Türschließergehäuses 7 eine Schwenkbewegung ausführen, bei welcher der Kolbenring 17 mit der Innenwand des Türschließergehäuses 7 ein Schwenklager für den Schließerkolben 4 bildet.The described negative effects of an undesired misalignment of the closer shaft 2 and thus also the shaft rotation axis 8 arise on the door closer 1 according to the FIGS. 1 to 4 due to the special design of the closing piston 4 not a. Rather, the gradation of the outer diameter of the closing piston 4 allows a tilting movement of the closing piston 4 in the support plane, without causing an increase in friction at the contact surface between the closing piston 4 and the inner wall of the door closer housing 7 would be connected. Since the extension of the piston ring 17 on the lock piston 4 along the housing axis 12 is dimensioned relatively small and since the piston ring 17 is disposed near the closer to the closing spring 6 end of the closer piston 4 and has a certain elasticity, the closing piston 4 relative to the inner wall of the door closer housing 7 perform a pivoting movement, in which the piston ring 17 forms a pivot bearing for the closer piston 4 with the inner wall of the door closer housing 7.

Infolgedessen kann die Lagerfläche 11 der an dem Schließerkolben 4 drehbar gelagerten Lagerrolle 5 ihre Ausrichtung in der Abstützungsebene 21 an die Ausrichtung der Steuerfläche 9 der Hubkurvenscheibe 3 anpassen. Ungeachtet der Schrägstellung der Schließerwelle 2 ergibt sich folglich in der Abstützungsebene 21 eine Linienberührung zwischen der Lagerfläche 11 der Lagerrolle 5 und der Steuerfläche 9 der Hubkurvenscheibe 3. Der bei dem Betrieb des Türschließers 1 an der Lagerfläche und der Steuerfläche 9 auftretende Verschleiß ist minimiert, das auf den Schließerkolben 4 wirkende Kippmoment ist gegenüber den Verhältnissen bei der in Figur 4 gestrichelt angedeuteten Ausrichtung der Lagerrolle 5 deutlich verkleinert.As a result, the bearing surface 11 of the locking piston 4 rotatably mounted on the bearing roller 5 can adjust their orientation in the support plane 21 to the orientation of the control surface 9 of the Hubkurvenscheibe 3. Regardless of the inclination of the closer shaft 2 thus results in the support plane 21 line contact between the bearing surface 11 of the bearing roller 5 and the control surface 9 Hubkurvenscheibe 3. The occurring in the operation of the door closer 1 on the bearing surface and the control surface 9 wear is minimized acting on the closing piston 4 tilting moment is compared to the conditions in the in FIG. 4 Dashed lines indicated orientation of the bearing roller 5 significantly reduced.

Bei der Bewegung längs der Gehäuseachse 12 ist der Schließerkolben 4 ausschließlich an dem Kolbenring 17 mit der Innenwand des Türschließergehäuses 7 in Kontakt. In Folge der guten Gleiteigenschaften des Kolbenrings 17 sind die von dem Schließerkolben 4 gegen die Wirkung der Schließerfeder 6 ausgeführten Bewegungen und auch die von dem Schließerkolben 4 aufgrund der Beaufschlagung durch die Schließerfeder 6 ausgeführten Bewegungen längs der Gehäuseachse 12 lediglich mit einer geringen Reibung behaftet,During the movement along the housing axis 12, the closing piston 4 is in contact exclusively with the piston ring 17 with the inner wall of the door closer housing 7. As a result of the good sliding properties of the piston ring 17, the movements carried out by the closing piston 4 against the action of the closing spring 6 and also the movements of the closing piston 4 due to the action of the closing spring 6 along the housing axis 12 are subject to only a slight friction,

Claims (7)

  1. Door closer
    • having a door closer housing (7),
    • having a closer shaft (2) which is rotatably supported on the door closer housing (7) about a shaft rotation axis (8) and which is provided inside the door closer housing (7) with a travel cam disc (3), which itself has a control face (9) which extends along the shaft rotation axis (8) of the closer shaft (2),
    • having a closer piston (4) which is movably guided in the door closer housing (7) along a housing axis (12) which extends in the transverse direction of the shaft rotation axis (8) of the closer shaft (2) and which is arranged along the housing axis (12) at a side of the closure shaft (2),
    • having a closure force producer (6) which acts with force on the closer piston (4) along the housing axis (12) in the direction towards the closer shaft (2), and
    • having a bearing roller (5) which is arranged between the closer piston (4) and the closer shaft (2) and which can be rotated about a roller rotation axis (10) which extends along the shaft rotation axis (8) and which has a bearing face (11) which extends along the roller rotation axis (10), wherein the closer piston (4) which is acted on with force by the closure force producer (6) in the direction towards the closer shaft (2) is supported in a support plane (21), which extends along the housing axis (12) and along the shaft rotation axis (8) and the roller rotation axis (10), via the bearing face (11) of the bearing roller (5) on the control face (9) of the travel cam disc (3) which is provided on the closer shaft (2),
    characterised in that
    the control face (9) of the travel cam disc (3) which is provided on the closer shaft (2) and/or the bearing face (11) of the bearing roller (5) is/are movable in a tilting manner in the support plane (21).
  2. Door closer according to claim 1, characterised in that the bearing face (11) of the bearing roller (5) is movable in a tilting manner in the support plane (21) by the bearing roller (5) being supported in a substantially play-free manner on the closer piston (4) in the direction of the tilting movability of the bearing face (11) of the bearing roller (5) and the closer piston (4) being movable in a tilting manner relative to the door closer housing (7).
  3. Door closer according to claim 2, characterised in that the closer piston (4) can be moved in a tilting manner relative to the door closer housing (7) by the closer piston (4) having along the housing axis (12) a non-uniform outer diameter and having at least one piston portion (15, 16) of a smaller diameter, on which the closer piston (4) is spaced apart from a housing inner wall of the door closer housing (7) which housing inner wall extends along the housing axis (12), and at least one piston portion (14) of a larger diameter on which the closer piston (4) is movably guided on the housing inner wall of the door closer housing (7) along the housing axis (12).
  4. Door closer according to claim 3, characterised in that the closer piston (4) has a piston base member (19) which forms the piston portion (15, 16) of a smaller diameter and on which a radial piston expansion which forms the piston portion (14) of a larger diameter is fitted.
  5. Door closer according to claim 4, characterised in that a piston ring (17) which is fitted to the piston base member (19) is provided as the radial piston expansion.
  6. Door closer according to any one of claims 3 to 5, characterised in that the piston portion (14) of a larger diameter of the closer piston (4) comprises a friction-reducing material at the side facing the housing inner wall of the door closer housing (7).
  7. Door closer according to any one of the preceding claims, characterised in that a closer spring is provided as the closure force producer (6) and a spring piston is provided as the closer piston (4).
EP14160683.0A 2014-03-19 2014-03-19 Door closer Active EP2921626B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14160683.0A EP2921626B2 (en) 2014-03-19 2014-03-19 Door closer
PL14160683.0T PL2921626T5 (en) 2014-03-19 2014-03-19 Door closer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14160683.0A EP2921626B2 (en) 2014-03-19 2014-03-19 Door closer

Publications (3)

Publication Number Publication Date
EP2921626A1 EP2921626A1 (en) 2015-09-23
EP2921626B1 true EP2921626B1 (en) 2018-09-05
EP2921626B2 EP2921626B2 (en) 2024-02-21

Family

ID=50289550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14160683.0A Active EP2921626B2 (en) 2014-03-19 2014-03-19 Door closer

Country Status (2)

Country Link
EP (1) EP2921626B2 (en)
PL (1) PL2921626T5 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3225795A1 (en) 1982-07-09 1984-01-12 Casma S.p.A., 20013 Magenta Door closer
DE4442340A1 (en) 1994-11-29 1996-05-30 Geze Gmbh & Co Floor-concealed door closer
US5901412A (en) 1996-01-30 1999-05-11 Dorma Gmbh + Co. Kg Top-mounted door closer
US20030093872A1 (en) 2001-10-10 2003-05-22 Jebron Limited Door closer
DE102004041358A1 (en) 2004-08-25 2006-03-02 Dorma Gmbh + Co. Kg Overhead closer
DE102006002751A1 (en) 2006-01-20 2007-09-20 Landert-Motoren Ag Swing door drive with cam disk for opening and closing of door, has swing drive which is mutually rotated about one eighty degree with an alternate pull to actuating rod and has mutual coupling
GB2462633A (en) 2008-08-14 2010-02-17 Jebron Ltd A roller cam follower mounted within a rotatable carrier
WO2011066941A1 (en) 2009-12-01 2011-06-09 Dorma Gmbh + Co. Kg Door closer comprising cam drive
WO2013079162A1 (en) 2011-12-02 2013-06-06 Dorma Gmbh + Co. Kg Door actuator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3225795A1 (en) 1982-07-09 1984-01-12 Casma S.p.A., 20013 Magenta Door closer
DE4442340A1 (en) 1994-11-29 1996-05-30 Geze Gmbh & Co Floor-concealed door closer
US5901412A (en) 1996-01-30 1999-05-11 Dorma Gmbh + Co. Kg Top-mounted door closer
US20030093872A1 (en) 2001-10-10 2003-05-22 Jebron Limited Door closer
DE102004041358A1 (en) 2004-08-25 2006-03-02 Dorma Gmbh + Co. Kg Overhead closer
DE102006002751A1 (en) 2006-01-20 2007-09-20 Landert-Motoren Ag Swing door drive with cam disk for opening and closing of door, has swing drive which is mutually rotated about one eighty degree with an alternate pull to actuating rod and has mutual coupling
GB2462633A (en) 2008-08-14 2010-02-17 Jebron Ltd A roller cam follower mounted within a rotatable carrier
WO2011066941A1 (en) 2009-12-01 2011-06-09 Dorma Gmbh + Co. Kg Door closer comprising cam drive
WO2013079162A1 (en) 2011-12-02 2013-06-06 Dorma Gmbh + Co. Kg Door actuator

Also Published As

Publication number Publication date
EP2921626A1 (en) 2015-09-23
PL2921626T3 (en) 2019-02-28
PL2921626T5 (en) 2024-04-29
EP2921626B2 (en) 2024-02-21

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