EP0740735B1 - Door closer - Google Patents

Door closer Download PDF

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Publication number
EP0740735B1
EP0740735B1 EP95905610A EP95905610A EP0740735B1 EP 0740735 B1 EP0740735 B1 EP 0740735B1 EP 95905610 A EP95905610 A EP 95905610A EP 95905610 A EP95905610 A EP 95905610A EP 0740735 B1 EP0740735 B1 EP 0740735B1
Authority
EP
European Patent Office
Prior art keywords
door closer
piston
plastics material
door
pinion
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
EP95905610A
Other languages
German (de)
French (fr)
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EP0740735A1 (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
Gretsch Unitas GmbH Baubeschlaege
Original Assignee
Gretsch Unitas GmbH
Gretsch Unitas GmbH Baubeschlaege
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Filing date
Publication date
Priority claimed from DE9413039U external-priority patent/DE9413039U1/en
Application filed by Gretsch Unitas GmbH, Gretsch Unitas GmbH Baubeschlaege filed Critical Gretsch Unitas GmbH
Publication of EP0740735A1 publication Critical patent/EP0740735A1/en
Application granted granted Critical
Publication of EP0740735B1 publication Critical patent/EP0740735B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05FDEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/04Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
    • E05F3/10Closers 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
    • E05F3/102Closers 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
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05FDEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/04Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
    • E05F3/10Closers 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
    • E05F3/104Closers 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
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING 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
    • E05Y2800/00Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/26Form or shape
    • E05Y2800/29Form or shape forming a unitary piece with another element
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING 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
    • E05Y2800/00Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/45Manufacturing
    • E05Y2800/46Injection moulding
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING 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
    • E05Y2900/00Application of doors, windows, wings or fittings thereof
    • E05Y2900/10Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13Type of wing
    • E05Y2900/132Doors

Definitions

  • the invention relates to a door closer according to the preamble of claim 1.
  • the closing pistons are the damping pistons as well as the interacting parts of the locking mechanism made of metal, preferably steel.
  • metal preferably steel.
  • closing and damping pistons on their guide surfaces provided with friction-reducing plastic pads.
  • Hydraulically damped door closers are used for synthetic resin pads on the piston also to seal the between the housing inner wall and the piston peripheral surface remaining gap.
  • a generic door closer is known from US-A-4,019,220, on which the pinion of the locking gear with counter teeth in the form of a one-piece rack that combs in a recess one with the closing and the damping piston provided base body is fitted.
  • the dimensions the recess and the rack are matched to one another in such a way that the latter in particular in the direction of the line of action of the transferring closing force with a little play positively becomes.
  • the known Door closer of a rack with relatively large dimensions especially with a relatively large width.
  • Zannstangen the tooth gaps over a long distance must be cleared in the direction of the rack width
  • Manufacturing the racks is complex.
  • a great manufacturing effort in the case of the previously known door closers requires that the recess of the piston body and the rack to achieve the desired support in terms of their Dimensions must be coordinated exactly.
  • the invention is based on the object of a door closer to create that with a low manufacturing and can produce economic effort.
  • this object is achieved according to the invention by its characterizing features.
  • the injection mold for the damping piston, closing piston and The existing unit can be inserted into the counter-toothing Injection molded parts easily with plastic.
  • Using corresponding, easily editable plastics also requires the machining of damping pistons following the injection molding process and locking piston a leek effort. can also be influenced by the choice of the plastic used is the strength and thus the load bearing capacity of the above Door closer elements. Because of the relatively small specific weight of the piston plastics results for the door closer according to the invention also has an extremely low weight.
  • plastic-appropriate shaping of damping pistons and closing pistons in particular on their peripheral surfaces Recesses and / or depressions are provided. This opens up the possibility of door closers Minimizing the use of materials and thus reducing the Manufacturing costs and the resulting device weight.
  • Door closer exists at least part of the closer shaft and / or the pinion made of plastic. This measure allows the manufacture of door closers associated manufacturing and economic effort diminish even further. The resulting door closer dead weight is minimized.
  • Door closer is characterized in that the pinion is parallel to the level of its movement is divided and at least part of the pinion made of metal and at least part of plastic.
  • the metal part or the metal ones Parts of the pinion can be stamped parts with little Effort.
  • the stamped part in question can be inserted as well as the Overmold the stamping parts of the counter toothing with plastic without any problems.
  • an inventive Door closer the pinion and / or the counter toothing has three parts, both sides of a part made of plastic each made of metal or in the case of the pinion a plastic part on both sides of a metal part is arranged.
  • the metal Part of the pinion has a relatively large overall width.
  • the counter toothing it is also in the case of the pinion for manufacturing reasons expedient, the total width of metal required on two strips to be distributed with half the total metal width. This also makes punching out the metal pinion parts essential facilitated.
  • pinion is preferred, where on both sides of a part made of metal Part made of plastic is arranged.
  • damping piston and the closing piston and the part of the counter toothing made of plastic and possibly the part of the pinion made of plastic and the closer shaft are each made in one piece. All plastic parts on the pinion and closer shaft existing unit on the one hand and on the counter teeth on the other hand, in this case as well as the damping and the locking piston can be manufactured together in one operation.
  • the operation of the door closer between the door leaf and the The force acting on the door frame is transferred via the closer shaft and transfer the pinion and the counter toothing assigned to it. Accordingly, the normally open shaft when the Door closer a strong, especially twisting load exposed. For this reason, it is recommended to use the closer shaft with a metal, especially torsionally rigid shaft core to be provided on which the pinion sits positively against rotation.
  • the metal shaft core of the closer shaft can be made of a plastic coating be surrounded.
  • a particularly resilient positive connection between the The closer shaft and the pinion on it result, if he shaft core of the closer shaft has a hexagon cross section having.
  • Door closer Due to the existing strength and / or elastic properties is a plastic for the components in question Door closer according to the invention preferably polyamide and / or polyphenylene sulfide and / or Kevlar provided.
  • Door closers for transferring large closing forces The plastic is between the door leaf and the door frame area reinforced with mineral fibers and / or glass fibers. This Measure can be additional or alternative to using metal Stiffeners are provided.
  • the door closer 1 shows a hydraulically damped door closer 1, as it appears when the door is closed.
  • the door closer 1 has a door closer housing 2, in a piston-toothing unit 3 with a closing piston 13, a damping piston 14 and counter teeth in the form of a Piston toothing 4 is guided.
  • On the door closer housing 2 is rotatably mounted a pinion 5, the one with the piston teeth 4 meshing and designed as a ring gear Pinion teeth 6 has.
  • the door closer 1 is fixed to a door leaf, not shown appropriate.
  • the pinion 5 When opening the door, the pinion 5 is in a via the linkage Counterclockwise rotation offset.
  • the pinion moves 5 by means of its ring gear 6, the piston-gear unit 3 in the illustration to the right against the force of one the door closer housing 2 one-sided supporting closer spring 8.
  • the closing piston displaces 13 hydraulic fluid present in a housing space 9 of the door closer housing 2. Part of the displaced hydraulic fluid flows through one of the closing piston 13 and the damping piston 14 penetrating channel 10 to a check valve 11, that in the end face of the damping piston facing away from the closer spring 8 14 is arranged.
  • the hydraulic fluid present in the housing space 9 a relatively large outflow cross-section when the door is opened is available, namely both the outflow cross section the channels, not shown, as well as the outflow cross section of the channel 10, the opening of the door is only one low hydraulic counterforce opposed.
  • the door is essentially the counterforce the closer spring 8 by the moving piston-gear unit 3 is compressed.
  • FIG. 2 shows a piston-toothing unit made of plastic 3a, which at its ends by a locking piston 13a, and a damping piston 14a is limited. Between the locking piston 13a and the damping piston 14a is a counter toothing Piston teeth 4a arranged in composite construction.
  • the piston teeth 4a comprises two parts running parallel to each other metal racks 15, 16 and one running between them Toothed strips 17 made of plastic.
  • On a peripheral surface 18 has the piston-gear unit 3a for reasons of material savings and / or recesses provided for weight reduction 19 on.
  • a circumferential groove 20 on the damping piston 14a serves to receive a sealing ring, not shown, by means of which between the damping piston 14a and the inner wall of the door closer housing remaining gap sealed and thereby an undefined outflow of hydraulic fluid avoided when moving the piston-gear unit 3a becomes.
  • the in Figs. 3 and 4 rack 15 shown in detail is as well as with this identical rack 16 as Stamped part made.
  • a material for the metal racks 15, 16 a refined and hardened steel is used.
  • the racks 15, 16 in the injection mold for the piston-toothing unit 3a inserted and on legs 21, 22 and molded on a connecting web 23 with plastic.
  • a further stiffening of the piston teeth 4a can be achieved with the help of racks, whose in the Plastic embedded legs by means of two parallel to each other extending webs are connected, between which the relevant pinion rolls.
  • a check valve 11a has one made of plastic manufactured sealing body 27 with a sealing seat 28 an end face of the damping piston 14a cooperates.
  • the frustoconical Sealing body 27 by means of three elastic plastic arms 29 held inside a plastic locking ring 30.
  • the locking ring 30 can with corresponding counter-locking on the associated End face of the damping piston 14a be locked.
  • the sealing body is then in the installed position 27 arranged immediately adjacent to the sealing seat 28, so that it immediately reverses the piston-gear unit 3a in the closing direction can come to rest on the sealing seat 28.
  • a pinion 5a which consists of two Plastic parts 31, 32 and one between them arranged metal part 33 has.
  • the pinion teeth 6a is designed as a ring gear.
  • the pinion 5a is form-fitting rotatably on a metal shaft core 34 of a closer shaft 40a on.
  • the shaft core 34 has a hexagonal cross section. On the face side, it has receiving bores with internal threads 35, 36 on, in the screws for fastening the boom screwed in for power transmission between the door leaf and door frame can be. It is largely on its outer circumference provided with a plastic coating.
  • the plastic jacket is in one piece with the plastic parts of the pinion to the molded metal parts of closer shaft 40a and pinion 5a.
  • Pinion 5b differs from pinion 5a of FIGS. 7 and 8 only in that on both sides of a part 37 Plastic metal parts 38, 39 are arranged.
  • the piston-gear unit 3a according to FIG. 2 are also the metal ones Parts 33, 38, 39 of the in Figs. 7 to 10 shown pinion 5a, 5b as stamped parts made of refined and hardened steel.
  • the metal parts of the pinions 5a, 5b are used in the manufacture together with the metal core of the closer shaft in the Injection molds inserted and overmolded with plastic.

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

Description

Die Erfindung betrifft einen Türschließer gemäß dem Oberbegriff des Anspruchs 1. The invention relates to a door closer according to the preamble of claim 1.

Bei bekannten Türschließern sind die Schließkolben, die Dämpfungskolben sowie die damit zusammenwirkenden Teile des Schließgetriebes aus Metall, vorzugsweise aus Stahl, gefertigt. Zur Verminderung der zwischen der Gehäuseinnenwand und der Umfangsfläche der in dem Gehäuse geführten Kolben auftretenden Reibung werden Schließ- und Dämpfungskolben an ihren Führungsflächen bekanntermaßen mit reibungsmindernden Kunststoffauflagen versehen. Bei bekannten hydraulisch gedämpften Türschließern dienen Kunstharzauflagen auf den Kolben überdies zur Abdichtung des zwischen der Gehäuseinnenwand und der Kolbenumfangsfläche verbleibenden Spaltes. Die Herstellung der genannten metallenen Komponenten bekannter Türschließer ist mit einem großen fertigungstechnischen Aufwand verbunden und entsprechend kostenintensiv.In known door closers, the closing pistons are the damping pistons as well as the interacting parts of the locking mechanism made of metal, preferably steel. To decrease that between the housing inner wall and the peripheral surface of the pistons guided in the housing As is known, closing and damping pistons on their guide surfaces provided with friction-reducing plastic pads. At acquaintances Hydraulically damped door closers are used for synthetic resin pads on the piston also to seal the between the housing inner wall and the piston peripheral surface remaining gap. The production of the metal components mentioned is known Door closer is with a great manufacturing effort connected and correspondingly expensive.

Aus der US-A-4,019,220 ist ein gattungsgemäßer Türschließer bekannt, an welchem das Ritzel des Schließgetriebes mit einer Gegenverzahnung in Form einer einteiligen Zahnstange kämmt, die in eine Aussparung eines mit dem Schließ- sowie dem Dämpfungskolben versehenen Grundkörpers eingepaßt ist. Dabei sind die Abmessungen der Aussparung und der Zahnstange derart aufeinander abgestimmt, daß letztere insbesondere in Richtung der Wirkungslinie der zu übertragenden Schließkraft mit geringem Spiel formschlüssig gehalten wird. Insbesondere in Fällen, in denen verhältnismäßig große Schließkräfte zu übertragen sind, bedarf der vorbekannte Türschließer einer Zahnstange mit verhältnismäßig großen Abmessungen, insbesondere mit einer verhältnismäßig großen Breite. Da an derartigen Zannstangen die Zahnlücken über eine große Strecke in Richtung der Zahnstangenbreite geräumt werden müssen, ist die Fertigung der Zahnstangen aufwendig. Ein großer Herstellungsaufwand wird im Falle der vorbekannten Türschließer überdies dadurch bedingt, daß die Aussparung des Kolbengrundkörpers und die Zahnstange zur Erzielung der gewünschten Abstützung hinsichtlich ihrer Abmessungen exakt aufeinander abgestimmt sein müssen.A generic door closer is known from US-A-4,019,220, on which the pinion of the locking gear with counter teeth in the form of a one-piece rack that combs in a recess one with the closing and the damping piston provided base body is fitted. Here are the dimensions the recess and the rack are matched to one another in such a way that the latter in particular in the direction of the line of action of the transferring closing force with a little play positively becomes. Especially in cases where proportionate Large closing forces are to be transmitted, the known Door closer of a rack with relatively large dimensions, especially with a relatively large width. There on such Zannstangen the tooth gaps over a long distance must be cleared in the direction of the rack width Manufacturing the racks is complex. A great manufacturing effort in the case of the previously known door closers requires that the recess of the piston body and the rack to achieve the desired support in terms of their Dimensions must be coordinated exactly.

Der Erfindung liegt nun die Aufgabe zugrunde, einen Türschließer zu schaffen, der sich mit einem geringen fertigungstechnischen und wirtschaftlichen Aufwand herstellen läßt.The invention is based on the object of a door closer to create that with a low manufacturing and can produce economic effort.

Diese Aufgabe wird ausgehend vom Oberbegriff des Anspruchs 1 erfindungsgemäß durch dessen kennzeichnenden Merkmale gelöst. In die Spritzgußform für die aus Dämpfungskolben, Schließkolben und Gegenverzahnung bestehende Baueinheit eingelegt lassen sich die Stanzteile problemlos mit Kunststoff umspritzen. Bei Verwendung entsprechender, einfach bearbeitbarer Kunststoffe erfordert auch die sich an den Spritzvorgang anschließende Bearbeitung von Dämpfungskolben und Schließkolben einen leciglich geringen Aufwand. über die Wahl des verwendeten Kunststoffs ebenfalls beeinflußbar ist die Festigkeit und somit die Lastaufnahmefähigkeit der genannten Türschließerelemente. Aufgrund des verhältnismäßig geringen spezifischen Gewichts der Kolbenkunststoffe ergibt sich für den erfindungsgemäßen Türschließer zudem ein äußerst geringes Eigengewicht. Außerdem können bei kunststoffgerechter Formgebung von Dämpfungskolben und Schließkolben insbesondere an deren Umfangsflächen Aussparungen und/oder Vertiefungen vorgesehen werden. Dadurch eröffnet sich an Türschließern die Möglichkeit zur Minimierung des Materialeinsatzes und somit zur Reduzierung der Herstellungskosten sowie des sich ergebenden Vorrichtungsgewichts.Starting from the preamble of claim 1, this object is achieved according to the invention by its characterizing features. In the injection mold for the damping piston, closing piston and The existing unit can be inserted into the counter-toothing Injection molded parts easily with plastic. Using corresponding, easily editable plastics also requires the machining of damping pistons following the injection molding process and locking piston a leek effort. can also be influenced by the choice of the plastic used is the strength and thus the load bearing capacity of the above Door closer elements. Because of the relatively small specific weight of the piston plastics results for the door closer according to the invention also has an extremely low weight. In addition, with plastic-appropriate shaping of damping pistons and closing pistons, in particular on their peripheral surfaces Recesses and / or depressions are provided. This opens up the possibility of door closers Minimizing the use of materials and thus reducing the Manufacturing costs and the resulting device weight.

Im Falle einer vorteilhaften Ausführungsform des erfindungsgemäßen Türschließers besteht wenigstens ein Teil der Schließerwelle und/oder des Ritzels aus Kunststoff. Durch diese Maßnahme läßt sich der mit der Türschließer-Herstellung verbundene fertigungstechnische und wirtschaftliche Aufwand noch weiter vermindern. Das sich ergebende Türschließer-Eigengewicht wird minimiert. In the case of an advantageous embodiment of the invention Door closer exists at least part of the closer shaft and / or the pinion made of plastic. This measure allows the manufacture of door closers associated manufacturing and economic effort diminish even further. The resulting door closer dead weight is minimized.

Eine weitere vorteilhafte Ausführungsform des erfindungsgemäßen Türschließers zeichnet sich dadurch aus, daß das Ritzel parallel zu der Ebene seiner Bewegung geteilt ist und wenigstens ein Teil des Ritzels aus Metall und wenigstens ein Teil aus Kunststoff besteht. Im Falle derartiger Türschließerelemente in Verbundbauweise ergibt sich durch die Verwendung metallener Teile eine Verstärkung der beim Betrieb des Türschließers in erster Linie belasteten Getriebeverzahnung. Auch das metallene Teil bzw. die metallenen Teile des Ritzels können als Stanzteile mit geringem Aufwand hergestellt werden. In die Spritzgußform für das Ritzel eingelegt läßt sich das betreffende Stanzteil ebenso wie die Stanzteile der Gegenverzahnung problemlos mit Kunststoff umspritzen.Another advantageous embodiment of the invention Door closer is characterized in that the pinion is parallel to the level of its movement is divided and at least part of the pinion made of metal and at least part of plastic. In the case of such door closer elements in composite construction reinforcement results from the use of metal parts who are primarily burdened when operating the door closer Gear teeth. Also the metal part or the metal ones Parts of the pinion can be stamped parts with little Effort. In the injection mold for the pinion the stamped part in question can be inserted as well as the Overmold the stamping parts of the counter toothing with plastic without any problems.

Als besonders zweckmäßig hat es sich erwiesen, daß an einem erfindungsgemäßen Türschließer das Ritzel und/oder die Gegenverzahnung drei Teile aufweist, wobei beidseits eines Teiles aus Kunststoff jeweils ein Teil aus Metall oder wobei im Falle des Ritzels beidseits eines Teiles aus Metall jeweils ein Teil aus Kunststoff angeordnet ist. Im Falle von Türschließern, an denen zwischen Kolben und Ritzel verhältnismäßig große Kräfte zu übertragen sind, ist es aus Festigkeitsgründen von Vorteil, wenn der metallene Teil des Ritzels eine verhältnismäßig große Gesamtbreite besitzt. Wie vorstehend für die Gegenverzahnung dargelegt, ist es auch im Falle des Ritzels aus fertigungstechnischen Gründen zweckmäßig, die benötigte Gesamtbreite aus Metall auf zwei Streifen mit jeweils der halben metallenen Gesamtbreite zu verteilen. Auch das Ausstanzen der metallenen Ritzelteile wird hierdurch wesentlich erleichtert. An Türschließern, an denen lediglich verhältnismäßig kleine Kräfte auftreten, wird Ritzeln der Vorzug gegeben, bei denen beidseits eines Teiles aus Metall jeweils ein Teil aus Kunststoff angeordnet ist.It has proven to be particularly expedient that an inventive Door closer the pinion and / or the counter toothing has three parts, both sides of a part made of plastic each made of metal or in the case of the pinion a plastic part on both sides of a metal part is arranged. In the case of door closers on which between Pistons and pinions to transmit relatively large forces For reasons of strength, it is advantageous if the metal Part of the pinion has a relatively large overall width. As stated above for the counter toothing, it is also in the case of the pinion for manufacturing reasons expedient, the total width of metal required on two strips to be distributed with half the total metal width. This also makes punching out the metal pinion parts essential facilitated. On door closers, where only proportionate small forces occur, pinion is preferred, where on both sides of a part made of metal Part made of plastic is arranged.

In weiterer vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, daß der Dämpfungskolben und der Schließkolben und der aus Kunststoff bestehende Teil der Gegenverzahnung sowie gegebenenfalls der aus Kunststoff bestehende Teil des Ritzels und der Schließerwelle jeweils einstückig gefertigt sind. Sämtliche Kunststoffteile an der aus Ritzel und Schließerwelle bestehenden Baueinheit einerseits sowie an der Gegenverzahnung andererseits können in diesem Fall ebenso wie der Dämpfungs- und der Schließkolben gemeinsam in einem Arbeitsgang hergestellt werden.In a further advantageous embodiment of the invention, that the damping piston and the closing piston and the part of the counter toothing made of plastic and possibly the part of the pinion made of plastic and the closer shaft are each made in one piece. All plastic parts on the pinion and closer shaft existing unit on the one hand and on the counter teeth on the other hand, in this case as well as the damping and the locking piston can be manufactured together in one operation.

Die bei Betrieb des Türschließers zwischen dem Türflügel und dem Türrahmenbereich wirkende Kraft wird über die Schließerwelle und das Ritzel sowie die diesem zugeordnete Gegenverzahnung übertragen. Dementsprechend ist auch die Schließerwelle bei Betrieb des Türschließers einer starken, insbesondere tordierenden Belastung ausgesetzt. Aus diesem Grund empfiehlt es sich, die Schließerwelle mit einem metallenen, insbesondere torsionssteifen Wellenkern zu versehen, auf dem das Ritzel formschlüssig drehfest aufsitzt. Der metallene Wellenkern der Schließerwelle kann von einer Kunststoffummantelung umgeben sein. The operation of the door closer between the door leaf and the The force acting on the door frame is transferred via the closer shaft and transfer the pinion and the counter toothing assigned to it. Accordingly, the normally open shaft when the Door closer a strong, especially twisting load exposed. For this reason, it is recommended to use the closer shaft with a metal, especially torsionally rigid shaft core to be provided on which the pinion sits positively against rotation. The metal shaft core of the closer shaft can be made of a plastic coating be surrounded.

Eine besonders belastbare formschlüssige Verbindung zwischen der Schließerwelle und dem darauf aufsitzenden Ritzel ergibt sich, wenn er Wellenkern der Schließerwelle einen Sechseckquerschnitt aufweist. A particularly resilient positive connection between the The closer shaft and the pinion on it result, if he shaft core of the closer shaft has a hexagon cross section having.

Eine weitere vorteilhafte Ausführungsform des erfindungsgemäßen Türschließers, bei der der Dämpfungskolben bei seiner Verschiebung in Schließrichtung eine vor der in Schließrichtung voreilenden Stirnfläche anstehende Dämpfungsflüssigkeit verdrängt, zeichnet sich dadurch aus, daß zumindest an der Umfangsfläche des Dämpfungskolbens wenigstens eine Nut zur Aufnahme eines umlaufenden Dichtungselements vorgesehen ist. Auf eine aufwendige Bearbeitung der Umfangsfläche des Dämpfungskolbens zur Erzielung einer hinreichenden Dichtwirkung zwischen der Gehäuseinnenwand und dem Dämpfungskolben kann in diesem Fall verzichtet werden. Daraus resultiert eine weitere Vereinfachung und Verbilligung der Türschließer-Herstellung.Another advantageous embodiment of the invention Door closer, in which the damping piston moves in the closing direction one ahead of the one leading in the closing direction Damping liquid displacing the front surface is displaced are characterized in that at least on the peripheral surface of the Damping piston at least one groove for receiving a rotating one Sealing element is provided. For complex processing the circumferential surface of the damping piston to achieve a sufficient sealing effect between the housing inner wall and the damping piston can be dispensed with in this case. Out of it this further simplifies and reduces the cost of producing door closers.

Im Falle von Türschließern, bei denen die von den in Verschieberichtung voreilenden Stirnflächen des Dämpfungs- und des Schließkolbens begrenzten Gehäuseräume des Türschließergehäuses über ein an dem Dämpfungskolben vorgesehenes und bei dessen Schließbewegung sperrendes Sperrventil für die Dämpfungsflüssigkeit hydraulisch miteinander in Verbindung stehen, ergibt sich insbesondere eine weitere Herstellungsvereinfachung dadurch, daß das Sperrventil einen aus Kunststoff bestehenden Dichtkörper aufweist, der an dem Dämpfungskolben in Strömungsrichtung der Dämpfungsflüssigkeit elastisch gehalten ist. Besonders zweckmäßig ist dabei, daß der Dichtkörper mittels wenigstens eines Kunststoffarmes an dem Dämpfungskolben gehalten ist. Neben den bereits genannten Vorteilen der Herstellungsvereinfachung und -verbilligung zeichnen sich derartige hydraulisch gedämpfte Türschließer durch äußerst kurze Schaltzeiten des Sperrventils aus. Der Dichtkörper läßt sich nämlich unmittelbar benachbart zu der Ventilöffnung anordnen. Infolgedessen muß der Dichtkörper bei Umsteuerung des Dämpfungskolbens in die Schließrichtung bis zum Erreichen des Dichtsitzes an der Ventilöffnung lediglich einen äußerst kurzen Schaltweg zurücklegen.In the case of door closers, where those are in the direction of displacement leading end faces of the damping and closing pistons limited housing space of the door closer housing via a provided on the damping piston and during its closing movement locking check valve for the damping fluid hydraulic stand in connection with each other results in particular a further manufacturing simplification in that the check valve has a sealing body made of plastic, the the damping piston in the flow direction of the damping fluid is kept elastic. It is particularly useful that the Sealing body by means of at least one plastic arm on the damping piston is held. In addition to the advantages already mentioned the simplification and reduction in production stand out Such hydraulically damped door closers by extremely short Switching times of the check valve off. The sealing body can namely arrange immediately adjacent to the valve opening. Consequently the sealing body must change when reversing the damping piston in the closing direction until the sealing seat is reached on the Valve opening only cover an extremely short switching distance.

Aufgrund der bestehenden Festigkeits- und/oder Elastizitätseigenschaften ist als Kunststoff für die in Frage kommenden Bauteile erfindungsgemäßer Türschließer vorzugsweise Polyamid und/oder Polyphenylensulfid und/oder Kevlar vorgesehen. Insbesondere an erfindungsgemäßen Türschließern zur übertragung großer Schließkräfte zwischen dem Türflügel und dem Türrahmenbereich ist der Kunststoff mittels Mineralfasern und/oder Glasfasern verstärkt. Diese Maßnahme kann zusätzlich oder alternativ zur Verwendung metallener Versteifungen vorgesehen werden.Due to the existing strength and / or elastic properties is a plastic for the components in question Door closer according to the invention preferably polyamide and / or polyphenylene sulfide and / or Kevlar provided. In particular on the invention Door closers for transferring large closing forces The plastic is between the door leaf and the door frame area reinforced with mineral fibers and / or glass fibers. This Measure can be additional or alternative to using metal Stiffeners are provided.

Die Erfindung wird nachfolgend anhand schematischer Darstellungen zu Ausführungsbeispielen näher erläutert. Es zeigen:

Fig. 1
eine Schnittdarstellung einer Bauart hydraulisch gedämpfter Türschließer,
Fig. 2
eine Explosionsdarstellung einer Ausführungsform einer Kolben-Verzahnungs-Einheit mit Sperrventil für den Türschließer nach Fig. 1,
Fig. 3
eine Zahnstange der Kolben-Verzahnungs-Einheit nach Fig. 2 in der Seitenansicht,
Fig. 4
die Zahnstange gemäß Fig. 3 in der Draufsicht,
Fig. 5
das Sperrventil nach Fig.2 in der Draufsicht,
Fig. 6
das Sperrventil nach Fig. 2 im Schnitt entlang Linie I-I in Fig. 5
Fig. 7
eine Schnittdarstellung einer ersten Ausführungsform eines Ritzels mit Schließerwelle für den Türschließer nach Fig. 1.
Fig. 8
das Ritzel mit Schließerwelle nach Fig. 7 im Teilschnitt entlang Linie II-II in Fig. 7,
Fig. 9
eine Schnittdarstellung einer zweiten Ausführungsform eines Ritzels mit Schließerwelle für den Türschließer nach Fig. 1,
Fig. 10
das Ritzel mit Schließerwelle nach Fig. 9 im Teilschnitt entlang Linie III-III in Fig. 9.
The invention is explained in more detail below on the basis of schematic representations of exemplary embodiments. Show it:
Fig. 1
2 shows a sectional illustration of a type of hydraulically damped door closer,
Fig. 2
2 shows an exploded view of an embodiment of a piston-toothing unit with a check valve for the door closer according to FIG. 1,
Fig. 3
3 shows a toothed rack of the piston-toothing unit according to FIG. 2 in a side view,
Fig. 4
3 in top view,
Fig. 5
the check valve according to Figure 2 in plan view,
Fig. 6
2 in section along line II in Fig. 5th
Fig. 7
2 shows a sectional illustration of a first embodiment of a pinion with a closer shaft for the door closer according to FIG. 1.
Fig. 8
7 in partial section along line II-II in Fig. 7,
Fig. 9
2 shows a sectional illustration of a second embodiment of a pinion with a closer shaft for the door closer according to FIG. 1,
Fig. 10
9 in partial section along line III-III in Fig. 9th

Fig. 1 zu entnehmen ist ein hydraulisch gedämpfter Türschließer 1, wie er sich bei geschlossenem Türflügel darstellt. Der Türschließer 1 besitzt ein Türschließergehäuse 2, in dem eine Kolben-Verzahnungs-Einheit 3 mit einem Schließkolben 13, einem Dämpfungskolben 14 sowie einer Gegenverzahnung in Form einer Kolbenverzahnung 4 verschiebbar geführt ist. An dem Türschließergehäuse 2 drehbar gelagert ist ein Ritzel 5, das eine mit der Kolbenverzahnung 4 kämmende und als Zahnkranz ausgebildete Ritzelverzahnung 6 besitzt.1 shows a hydraulically damped door closer 1, as it appears when the door is closed. The door closer 1 has a door closer housing 2, in a piston-toothing unit 3 with a closing piston 13, a damping piston 14 and counter teeth in the form of a Piston toothing 4 is guided. On the door closer housing 2 is rotatably mounted a pinion 5, the one with the piston teeth 4 meshing and designed as a ring gear Pinion teeth 6 has.

Der Türschließer 1 ist fest an einem nicht dargestellten Türflügel angebracht. Ein ebenfalls nicht dargestelltes Gestänge, das mittels einer Stirnverzahnung 7 an einer Schließerwelle 40 des Ritzels 5 drehfest an diesem gelagert ist, verbindet den Türschließer 1 mit dem Türrahmen.The door closer 1 is fixed to a door leaf, not shown appropriate. A linkage, also not shown, that by means of a spur toothing 7 on a closer shaft 40 of the Pinion 5 is rotatably mounted on this, connects the door closer 1 with the door frame.

Beim Öffnen der Tür wird das Ritzel 5 über das Gestänge in eine Drehung im Gegenuhrzeigersinn versetzt. Dabei verschiebt das Ritzel 5 mittels seines Zahnkranzes 6 die Kolben-Verzahnungs-Einheit 3 in der Darstellung nach rechts gegen die Kraft einer sich an dem Türschließergehäuse 2 einseitig abstützenden Schließerfeder 8. Bei seiner Verschiebebewegung verdrängt der Schließkolben 13 in einem Gehäuseraum 9 des Türschlieflergehäuses 2 anstehende Hydraulikflüssigkeit. Ein Teil der verdrängten Hydraulikflüssigkeit strömt dabei durch einen den Schließkolben 13 sowie den Dämpfungskolben 14 durchdringenden Kanal 10 zu einem Sperrventil 11, das in der der Schließerfeder 8 abgewandten Stirnfläche des Dämpfungskolbens 14 angeordnet ist. Unter der Wirkung der Verschiebebewegung der Kolben-Verzahnungs-Einheit 3 und des dadurch auf die Hydraulikflüssigkeit ausgeübten Druckes öffnet das Sperrventil 11, und die in dem Kanal 10 anstehende Hydraulikflüssigkeit kann in einen in Bewegungsrichtung der Kolben-Verzahnungs-Einheit 3 hinter dem Dämpfungskolben 14 entstehenden Gehäuseraum 12 einströmen. In den Gehäuseraum 12 münden außerdem nicht dargestellte weitere Kanäle, die eine Verbindung mit dem Gehäuseraum 9 herstellen und durch die aus dem Gehäuseraum 9 verdrängte Hydraulikflüssigkeit in den Gehäuseraum 12 strömt.When opening the door, the pinion 5 is in a via the linkage Counterclockwise rotation offset. The pinion moves 5 by means of its ring gear 6, the piston-gear unit 3 in the illustration to the right against the force of one the door closer housing 2 one-sided supporting closer spring 8. During its displacement movement, the closing piston displaces 13 hydraulic fluid present in a housing space 9 of the door closer housing 2. Part of the displaced hydraulic fluid flows through one of the closing piston 13 and the damping piston 14 penetrating channel 10 to a check valve 11, that in the end face of the damping piston facing away from the closer spring 8 14 is arranged. Under the effect of the shifting movement the piston-gear unit 3 and thereby on the Hydraulic fluid applied pressure opens the check valve 11, and the hydraulic fluid present in the channel 10 can in a direction of movement of the piston-gear unit 3 flow into the housing space 12 created behind the damping piston 14. In addition, not shown open into the housing space 12 further channels that connect to the housing space 9 and by the hydraulic fluid displaced from the housing space 9 flows into the housing space 12.

Da demnach der in dem Gehäuseraum 9 anstehenden Hydraulikflüssigkeit beim Öffnen der Tür ein verhältnismäßig großer Abströmungsquerschnitt zur Verfügung steht, nämlich sowohl der Abströmungsquerschnitt der nicht dargestellten Kanäle als auch der Abströmungsquerschnitt des Kanals 10, wird dem Öffnen der Tür eine lediglich geringe hydraulische Gegenkraft entgegengesetzt. Beim Öffnen der Tür zu überwinden ist im wesentlichen die Gegenkraft der Schließerfeder 8, die durch die sich verschiebende Kolben-Verzahnungs-Einheit 3 zusammengedrückt wird.Accordingly, the hydraulic fluid present in the housing space 9 a relatively large outflow cross-section when the door is opened is available, namely both the outflow cross section the channels, not shown, as well as the outflow cross section of the channel 10, the opening of the door is only one low hydraulic counterforce opposed. At the Overcoming opening the door is essentially the counterforce the closer spring 8 by the moving piston-gear unit 3 is compressed.

Wird nun der geöffnete Türflügel freigegeben, so längt sich die Schließerfeder 8 und verschiebt dabei die Kolben-Verzahnungs-Einheit 3 in der Darstellung nach links. Unter der Wirkung der Verschiebung wird das Sperrventil 11 in Sperrstellung geschaltet und die nunmehr in dem Gehäuseraum 12 anstehende Hydraulikflüssigkeit kann lediglich noch durch die nicht dargestellten Kanäle in den Gehäuseraum 9 abfließen. Infolgedessen wird der Verschiebung der Kolben-Verzahnungs-Einheit 3 durch die Schließerfeder 8 eine verhältnismäßig große hydraulische Gegenkraft entgegengesetzt. Die aus der Kraft der Schließerfeder 8 und der dieser entgegenwirkenden hydraulischen Gegenkraft resultierende und über das Ritzel 5, die Schließerwelle 40 sowie das nicht dargestellte Gestänge zwischen Türflügel und Türrahmen übertragene Schließkraft ist dementsprechend verhältnismäßig klein. Infolgedessen ist ein langsames Schließen der Tür gewährleistet.If the opened door leaf is released, the lengthens Closer spring 8 and moves the piston-gear unit 3 to the left in the illustration. Under the effect of the shift the check valve 11 is switched into the blocking position and the hydraulic fluid now present in the housing space 12 can only through the channels, not shown in the Drain housing space 9. As a result, the shift of Piston-toothing unit 3 by the closer spring 8 a relatively large opposing hydraulic force. The from the force of the closer spring 8 and counteracting this hydraulic counterforce resulting and via the pinion 5, the closer shaft 40 and the linkage, not shown, between Door leaf and door frame transferred locking force is accordingly relatively small. As a result, it is slow Guaranteed closing the door.

Die vorstehend beschriebenen Bewegungsabläufe an dem Türschließer 1 gemäß Fig. 1 lassen sich mit Hilfe von Türschließerkomponenten realisieren, wie sie in den Fign. 2 bis 10 dargestellt sind. The movements described above on the door closer 1 according to FIG. 1 can be made using door closer components realize as shown in fig. 2 to 10 are shown.

Fig. 2 zeigt eine aus Kunststoff gefertigte Kolben-Verzahnungs-Einheit 3a, die an ihren Enden von einem Schließkolben 13a, sowie einem Dämpfungskolben 14a begrenzt wird. Zwischen dem Schließkolben 13a und dem Dämpfungskolben 14a ist als Gegenverzahnung eine Kolbenverzahnung 4a in Verbundbauweise angeordnete. Die Kolbenverzahnung 4a umfaßt als Teile zwei parallel zueinander verlaufende metallene Zahnstangen 15, 16 und einen zwischen diesen verlaufenden Verzahnungsstreifen 17 aus Kunststoff. An einer Umfangsfläche 18 weist die Kolben-Verzahnungs-Einheit 3a aus Gründen der Materialersparnis und/oder der Gewichtsreduzierung vorgesehene Aussparungen 19 auf. Eine umlaufende Nut 20 an dem Dämpfungskolben 14a dient zur Aufnahme eines nicht dargestellten Dichtringes, mittels dessen der zwischen dem Dämpfungskolben 14a und der Innenwand des Türschließergehäuses verbleibende Spalt abgedichtet und dadurch ein undefiniertes Abströmen von Hydraulikflüssigkeit beim Verschieben der Kolben-Verzahnungs-Einheit 3a vermieden wird.2 shows a piston-toothing unit made of plastic 3a, which at its ends by a locking piston 13a, and a damping piston 14a is limited. Between the locking piston 13a and the damping piston 14a is a counter toothing Piston teeth 4a arranged in composite construction. The piston teeth 4a comprises two parts running parallel to each other metal racks 15, 16 and one running between them Toothed strips 17 made of plastic. On a peripheral surface 18 has the piston-gear unit 3a for reasons of material savings and / or recesses provided for weight reduction 19 on. A circumferential groove 20 on the damping piston 14a serves to receive a sealing ring, not shown, by means of which between the damping piston 14a and the inner wall of the door closer housing remaining gap sealed and thereby an undefined outflow of hydraulic fluid avoided when moving the piston-gear unit 3a becomes.

Die in den Fign. 3 und 4 im einzelnen dargestellte Zahnstange 15 wird ebenso wie die mit dieser baugleiche Zahnstange 16 als Stanzteil hergestellt. Als Werkstoff für die metallenen Zahnstangen 15, 16 wird ein veredelter und gehärteter Stahl verwendet. Zur Verbindung mit dem Schließkolben 13a sowie dem Dämpfungskolben 14a werden die Zahnstangen 15, 16 in die Spritzgußform für die Kolben-Verzahnungs-Einheit 3a eingelegt und an Schenkeln 21, 22 sowie an einem diese verbindenden Steg 23 mit Kunststoff umspritzt. Eine noch weitergehende Versteifung der Kolbenverzahnung 4a läßt sich mit Hilfe von Zahnstangen erzielen, deren in den Kunststoff eingebettete Schenkel mittels zweier parallel zueinander verlaufender Stege verbunden sind, zwischen denen dann das betreffende Ritzel abrollt.The in Figs. 3 and 4 rack 15 shown in detail is as well as with this identical rack 16 as Stamped part made. As a material for the metal racks 15, 16 a refined and hardened steel is used. For connection to the closing piston 13a and the damping piston 14a, the racks 15, 16 in the injection mold for the piston-toothing unit 3a inserted and on legs 21, 22 and molded on a connecting web 23 with plastic. A further stiffening of the piston teeth 4a can be achieved with the help of racks, whose in the Plastic embedded legs by means of two parallel to each other extending webs are connected, between which the relevant pinion rolls.

Ein Sperrventil 11a besitzt einen aus Kunststoff gefertigten Dichtkörper 27, der mit einem Dichtsitz 28 an einer Stirnfläche des Dämpfungskolbens 14a zusammenwirkt.A check valve 11a has one made of plastic manufactured sealing body 27 with a sealing seat 28 an end face of the damping piston 14a cooperates.

Wie insbesondere den Fign. 5 und 6 zu entnehmen ist, wird der kegelstumpfförmige Dichtkörper 27 mittels dreier elastischer Kunststoffarme 29 im Innern eines Kunststoff-Rastringes 30 gehalten. Der Rastring 30 kann mit entsprechenden Gegenrasten an der zugehörigen Stirnfläche des Dämpfungskolbens 14a verrastet werden. In Einbaulage ist dann der Dichtkörper 27 unmittelbar benachbart zu dem Dichtsitz 28 angeordnet, so daß er unmittelbar mit Umsteuern der Kolben-Verzahnungs-Einheit 3a in Schließrichtung an dem Dichtsitz 28 zur Anlage kommen kann. As in particular the FIGS. 5 and 6, the frustoconical Sealing body 27 by means of three elastic plastic arms 29 held inside a plastic locking ring 30. The locking ring 30 can with corresponding counter-locking on the associated End face of the damping piston 14a be locked. The sealing body is then in the installed position 27 arranged immediately adjacent to the sealing seat 28, so that it immediately reverses the piston-gear unit 3a in the closing direction can come to rest on the sealing seat 28.

Die Fign. 7 bis 10 zeigen Ritzel mit Schließerwellen, die an den Türschließern nach Fig. 1 gemeinsam mit den vorstehend beschriebenen Kolben-Verzahnungs-Einheiten verwendet werden können.The figures 7 to 10 show pinions with closer shafts connected to the 1 together with those described above Piston gear units can be used.

In den Fign. 7 und 8 dargestellt ist ein Ritzel 5a, das zwei aus Kunststoff gefertigte Teile 31, 32 sowie einen zwischen diesen angeordneten metallenen Teil 33 aufweist. Die Ritzelverzahnung 6a ist als Zahnkranz ausgebildet. Das Ritzel 5a sitzt formschlüssig drehfest auf einem metallenen Wellenkern 34 einer Schließerwelle 40a auf. Der Wellenkern 34 besitzt einen Sechseckquerschnitt. Stirnseitig weist er mit Innengewinden versehene Aufnahmebohrungen 35, 36 auf, in die Schrauben zur Befestigung des Gestänges für die Kraftübertragung zwischen Türflügel und Türrahmen eingeschraubt werden können. An seinem Außenumfang ist er weitgehend mit einer Kunststoffummantelung versehen. Die Kunststoffummantelung ist einstückig mit den Kunststoffteilen des Ritzels an die metallenen Teile von Schließerwelle 40a und Ritzel 5a angespritzt.In Figs. 7 and 8, there is shown a pinion 5a, which consists of two Plastic parts 31, 32 and one between them arranged metal part 33 has. The pinion teeth 6a is designed as a ring gear. The pinion 5a is form-fitting rotatably on a metal shaft core 34 of a closer shaft 40a on. The shaft core 34 has a hexagonal cross section. On the face side, it has receiving bores with internal threads 35, 36 on, in the screws for fastening the boom screwed in for power transmission between the door leaf and door frame can be. It is largely on its outer circumference provided with a plastic coating. The plastic jacket is in one piece with the plastic parts of the pinion to the molded metal parts of closer shaft 40a and pinion 5a.

Ein in den Fign. 9 und 10 mit einer Schließerwelle 40b dargestelltes Ritzel 5b unterscheidet sich von dem Ritzel 5a der Fign. 7 und 8 lediglich dadurch, daß beidseits eines Teils 37 aus Kunststoff metallene Teile 38, 39 angeordnet sind. Ebenso wie die metallenen Zahnstangen 15, 16, der Kolben-Verzahnungs-Einheit 3a nach Fig. 2 werden auch die metallenen Teile 33, 38, 39 der in den Fign. 7 bis 10 dargestellten Ritzel 5a, 5b als Stanzteile aus veredeltem und gehärtetem Stahl gefertigt. Die Metallteile der Ritzel 5a, 5b werden bei der Herstellung gemeinsam mit dem metallenen Kern der Schließerwelle in die Spritzgußformen eingelegt und mit Kunststoff umspritzt.One in the fig. 9 and 10 with a closer shaft 40b Pinion 5b differs from pinion 5a of FIGS. 7 and 8 only in that on both sides of a part 37 Plastic metal parts 38, 39 are arranged. Just like that metal racks 15, 16, the piston-gear unit 3a according to FIG. 2 are also the metal ones Parts 33, 38, 39 of the in Figs. 7 to 10 shown pinion 5a, 5b as stamped parts made of refined and hardened steel. The metal parts of the pinions 5a, 5b are used in the manufacture together with the metal core of the closer shaft in the Injection molds inserted and overmolded with plastic.

Claims (13)

  1. Door closer having a closing piston (13, 13a) which is guided in a door closer housing (2) and is arranged to be displaced against a return force by way of a closing mechanism on opening of the associated door wing, and also having a damping piston (14, 14a, 14b), made of plastics material, which is displaced in the door closer housing (2) with the closing piston (13, 13a) in the same direction, wherein the closing mechanism has a rotatable closer shaft (40, 40a, 40b) connected to an actuating device, arranged between the door wing and the stationary door frame region, for the transmission of force between the door wing and the door frame region, and also has a pinion (5, 5a, 5b) which is connected to the closer shaft in a rotationally secure manner and which meshes at its toothed region (6, 6a, 6b) with a complementary toothed region (4, 4a, 4b) by way of which the damping piston (14, 14a, 14b) and the closing piston (13, 13a) are connected to each other, characterized in that the complementary toothed region (4, 4a, 4b) is divided in the direction of its displacement and at least one part (15, 16, 24) of the complementary toothed region (4, 4a, 4b) consists of metal and at least one part (17, 25, 26) consists of plastics material.
  2. Door closer according to Claim 1, characterized in that the closing piston (13, 13a) consists of plastics material.
  3. Door closer according to Claim 1 or 2, characterized in that at least one part of the closer shaft (40, 40a, 40b) and/or of the pinion (5, 5a, 5b) consists of plastics material.
  4. Door closer according to Claim 3, characterized in that the pinion (5, 5a, 5b) is divided parallel to the plane of its movement and at least one part (33, 38, 39) of the pinion (5, 5a, 5b) consists of metal and at least one part (31, 32, 37) consists of plastics material.
  5. Door closer according to Claim 4, characterized in that the pinion (5, 5a, 5b) and/or the complementary toothed region (4, 4a, 4b) has three parts, a part (15, 16; 38, 39) made of metal being arranged on each side of a part (17; 37) made of plastics material, or a part (25, 26; 31, 32) made of plastics material being arranged on each side of a part (24; 33) made of metal.
  6. Door closer according to one of Claims 2 to 5, characterized in that the damping piston (14, 14a, 14b) and optionally the closing piston (13, 13a) of plastics material and the part consisting of plastics material of the complementary toothed region (4, 4a, 4b), and also, optionally, the part consisting of plastics material of the pinion (5, 5a, 5b) and of the closure shaft (40, 40a, 40b) are in each case produced in one piece.
  7. Door closer according to one of Claims 1 to 6, characterized in that the closer shaft (40, 40a, 40b) has a metal shaft core (34) on which the pinion (5, 5a, 5b) sits in an interlocking rotationally secure manner.
  8. Door closer according to Claim 7, characterized in that the metal shaft core (34) of the closer shaft (40, 40a, 40b) has a hexagonal cross-section.
  9. Door closer according to one of Claims 1 to 8, wherein the damping piston (14, 14a, 14b), during its displacement in the closing direction, displaces a damping fluid present in front of the leading end face in the closing direction, characterized in that at least on the peripheral surface of the damping piston (14, 14a, 14b) at least one groove (20) is provided to receive a circumferential sealing element.
  10. Door closer according to Claim 9, wherein the housing spaces (9, 12) of the door closer housing (2) which are bounded by the leading end faces, in the displacement direction, of the damping piston (14, 14a, 14b) and of the closing piston (13, 13a) are connected hydraulically to one another by way of a shut-off valve (11, 11a), for the damping fluid, which is provided on the damping piston (14, 14a, 14b) and which shuts-off during the closing movement of the latter, characterized in that the shut-off valve (11, 11a) has a sealing body (27) which consists of plastics material and which is held resiliently against the damping piston (14, 14a, 14b) in the direction of flow of the damping fluid.
  11. Door closer according to Claim 10, characterized in that the sealing body (27) is held by means of at least one plastics material arm (29) against the damping piston (14, 14a, 14b).
  12. Door closer according to one of Claims 1 to 11, characterized in that polyamide and/or polyphenylene sulphide and/or Kevlar are provided as plastics material.
  13. Door closer according to one of Claims 1 to 12, characterized in that the plastics material is reinforced by means of mineral fibres and/or by means of glass fibres.
EP95905610A 1994-01-19 1994-12-29 Door closer Expired - Lifetime EP0740735B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE9400827U 1994-01-19
DE9400827 1994-01-19
DE9413039U DE9413039U1 (en) 1994-01-19 1994-08-12 Door closer
DE9413039U 1994-08-12
PCT/EP1994/004344 WO1995020090A1 (en) 1994-01-19 1994-12-29 Door closer

Publications (2)

Publication Number Publication Date
EP0740735A1 EP0740735A1 (en) 1996-11-06
EP0740735B1 true EP0740735B1 (en) 1998-05-20

Family

ID=25961648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95905610A Expired - Lifetime EP0740735B1 (en) 1994-01-19 1994-12-29 Door closer

Country Status (3)

Country Link
EP (1) EP0740735B1 (en)
ES (1) ES2119384T3 (en)
WO (1) WO1995020090A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1288419A2 (en) 2001-08-31 2003-03-05 GEZE GmbH Manufacturing method of a toothing for an actuator and door closer with elements made following the method
DE10259237A1 (en) * 2002-12-17 2004-07-15 Geze Gmbh Drive for a wing of a door or a window

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE460551T1 (en) * 2003-05-27 2010-03-15 Geze Gmbh DRIVE FOR A ROTARY OR TILT SINGLE
EP1705329A1 (en) * 2005-03-24 2006-09-27 GEZE GmbH Drive for a wing of a door or window
DE102010003384B4 (en) * 2010-03-29 2016-12-01 Geze Gmbh Method for producing a piston of a door drive
DE102013112379A1 (en) * 2013-11-11 2015-05-13 Dorma Deutschland Gmbh Universal energy storage
DE102014101431B4 (en) * 2014-02-05 2024-06-27 Eco Schulte Gmbh & Co. Kg Door closer with damping piston

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019220A (en) * 1976-01-13 1977-04-26 Reading Door Closer Corporation Piston assembly for door closer
US4097956A (en) * 1976-04-02 1978-07-04 Ryobi, Ltd. Hydraulic door operator with overtravel restraint
FR2508089A1 (en) * 1981-06-23 1982-12-24 Paumellerie Electrique AUTOMATIC DOOR CLOSER WITH BUILT-IN BRAKING MEANS
JPS6319434A (en) * 1986-07-10 1988-01-27 Nifco Inc Elastic oil damper

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1288419A2 (en) 2001-08-31 2003-03-05 GEZE GmbH Manufacturing method of a toothing for an actuator and door closer with elements made following the method
DE10142756C1 (en) * 2001-08-31 2003-05-28 Geze Gmbh Method for producing a toothing for a transmission and a door closer with parts produced by the method
DE10259237A1 (en) * 2002-12-17 2004-07-15 Geze Gmbh Drive for a wing of a door or a window
DE10259237B4 (en) * 2002-12-17 2006-02-09 Geze Gmbh Drive for a wing of a door or a window

Also Published As

Publication number Publication date
ES2119384T3 (en) 1998-10-01
EP0740735A1 (en) 1996-11-06
WO1995020090A1 (en) 1995-07-27

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