EP4180608B1 - Door closer - Google Patents

Door closer Download PDF

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Publication number
EP4180608B1
EP4180608B1 EP22205204.5A EP22205204A EP4180608B1 EP 4180608 B1 EP4180608 B1 EP 4180608B1 EP 22205204 A EP22205204 A EP 22205204A EP 4180608 B1 EP4180608 B1 EP 4180608B1
Authority
EP
European Patent Office
Prior art keywords
locking body
valve
piston
drive
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
EP22205204.5A
Other languages
German (de)
French (fr)
Other versions
EP4180608A1 (en
Inventor
Vladimir Pugin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gretsch Unitas GmbH Baubeschlaege
Original Assignee
Gretsch Unitas GmbH Baubeschlaege
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Publication of EP4180608A1 publication Critical patent/EP4180608A1/en
Application granted granted Critical
Publication of EP4180608B1 publication Critical patent/EP4180608B1/en
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Anticipated expiration legal-status Critical

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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
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
    • E05F3/12—Special devices controlling the circulation of the liquid, e.g. valve arrangement
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/23—Actuation thereof
    • E05Y2201/232—Actuation thereof by automatically acting means
    • E05Y2201/236—Actuation thereof by automatically acting means using force or torque
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/252—Type of friction
    • E05Y2201/254—Fluid or viscous friction
    • E05Y2201/256—Fluid or viscous friction with pistons or vanes
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/26—Form or shape
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Type of wing
    • E05Y2900/132—Doors

Definitions

  • the invention relates to a door closer with the features of the preamble of claim 1.
  • Door closers of the type mentioned are known from the prior art, for example DE 20 2012 003 928 U1 . With such a door closer, it is possible to operate a door leaf so that it can be moved into the closed position starting from different opening angles.
  • the valves arranged in the damping pistons and drive pistons are important for the function of the door closer, to be able to reliably move a door leaf into the closed position, and for safety (overload situations). These are used to regulate the fluid flow between part of the with the fluid (e.g. a hydraulic oil) filled interior and another part of the interior of the door closer.
  • the overload valves on the drive piston and damping piston serve to reduce or avoid overload situations so that damage to the door closer can be prevented. If the design of the overload valves is simplified, there is often a risk of malfunctions, for example due to leaks.
  • the WO2019/076746 discloses a door closer with an overload valve.
  • the invention is based on the object of specifying a door closer with structurally simple yet reliably operating overload valves.
  • the invention solves this problem by a door closer with the features of claim 1.
  • the door closer is set up and/or intended to operate a leaf of a door, a window or the like.
  • the door closer has a closer shaft and a cam disc connected in a rotationally fixed manner to the closer shaft, the cam disc interacting, in particular via a drive contour, with a drive device comprising a drive piston and, in particular via a damping contour, with a damping device comprising a damping piston.
  • the drive piston and/or the damping piston each has/have an overload valve.
  • the overload valve each has a valve channel extending along a channel axis (formed in the relevant piston, ie in the drive piston or in the damping piston), a blocking body and a sealing seat.
  • the locking body is in accommodated in a locking body receiving section in the valve channel and rests against the sealing seat in a particularly sealing manner when the overload valve is closed.
  • the valve channel has an n-angular cross section (inner cross section) with n ⁇ 3 at least in the locking body receiving section, preferably along the entire valve channel.
  • the locking body is spherical or cylindrical. In other words, the locking body can be designed as a ball or rotating part or as a cylinder, in particular as a vertical circular cylinder.
  • the proposed design makes it possible to achieve precise positioning of the locking body relative to the sealing seat or the valve opening, whereby the cross sections of the locking body (spherical or cylindrical) and the locking body receiving section or the valve channel (n-angular with n ⁇ 3) are the same differ from each other, sufficient outflow openings remain in the corner areas of the n-angular cross section.
  • This is a particularly simple design that even allows the use of standard bodies, for example a ball.
  • the locking body is in particular matched to the locking body receiving section in such a way that the locking body can move in the valve channel along the locking body section, in particular can roll along the channel axis. This allows a so-called “Halo", as occurs with barrier bodies that cannot roll along the channel axis, can be avoided.
  • the blocking body can rest on at least two inner surfaces of the n-angular cross section of the blocking body receiving section or of the valve channel.
  • the locking body can be dimensioned such that the locking body is guided in the locking body receiving section orthogonally to the channel axis or laterally without play.
  • the blocking body is therefore axially movable along the channel axis, for example by rolling, but does not experience any lateral play. Due to the lack of lateral play, the locking body always lies centered on the sealing seat. This contributes to a reliable seal when the overload valve is closed.
  • n ⁇ 3 and n ⁇ 8 can contribute (3 ⁇ n ⁇ 8).
  • the inner surfaces of the valve channel provide sufficient contact surfaces for the blocking body, with sufficient outflow openings remaining in the corner areas.
  • valve channel can have a square cross section at least in the blocking body receiving section, preferably along the entire valve channel. This promotes flexibility with regard to the selection of locking bodies, since both spherical and cylindrical locking bodies can be guided using the square cross section.
  • the spherical locking body (ball) can rest on the four inner surfaces of the locking body receiving section or the valve channel.
  • the cylindrical locking body can rest on two opposing inner surfaces of the locking body receiving section or the valve channel if it is designed to be free of lateral play.
  • the blocking body receiving section or the valve channel has a square cross section, the corner regions between adjacent inner surfaces are designed as 90° angles. This maximizes the free cross section of the outflow openings.
  • the blocking body receiving section or the valve channel has a square cross section
  • optional roundings (“grooves”) can be formed in the corner regions between adjacent inner surfaces. This reduces the notch effect that occurs in the corner areas.
  • the production of the locking body receiving section or the valve channel can be simplified, for example by using milling tools with a larger diameter.
  • the length of the locking body receiving section along the channel axis can be dimensioned such that the locking body is displaced from the sealing seat (closed state of the overload valve) in the locking body receiving section by a distance of 0.6 mm to 1.3 mm (millimeters). (open state of the overload valve). This releases a sufficient opening cross-section between the sealing seat and the blocking body on the overload valve, so that the fluid contained in the interior of the door closer (e.g. an oil) can flow through the overload valve.
  • the fluid contained in the interior of the door closer e.g. an oil
  • the sealing seat can be formed by a shoulder in the valve channel, through which the cross section of the valve channel is reduced in relation to the locking body receiving section. This means you can use simple means Sealing seat can be formed.
  • the internal dimension or the internal diameter of the valve channel at the shoulder can be smaller than the external dimensions, for example the diameter, of the locking body.
  • the side edges of the locking body receiving section at the end of the locking body receiving section facing away from the sealing seat can be shaped, in particular embossed, in such a way that the cross section of the valve channel on the side edges is reduced in relation to the cross section of the locking body receiving section.
  • This makes it possible to form a structurally simple stop with which the displacement of the locking body away from the sealing seat can be limited.
  • a captive protection can be achieved for the locking body.
  • the cross section of the valve channel is reduced at the side edges in relation to the cross section of the locking body receiving section in particular in such a way that the locking body cannot get out of the locking body receiving section at the end facing away from the sealing seat.
  • the drive piston can face a pressure chamber on the drive side with its piston crown and/or the damping piston can face a pressure chamber on the damping side with its piston crown.
  • the opening direction of the overload valve of the drive piston faces the drive-side pressure chamber (valve opens towards the drive-side pressure chamber).
  • the opening direction of the overload valve of the damping piston faces the pressure chamber on the damping side (valve opens towards the pressure chamber on the damping side). This means that an excess pressure prevailing in the interior, in particular between the damping piston and the drive piston be reduced to the pressure chamber on the damping side or to the pressure chamber on the drive side.
  • the closer shaft is arranged in particular between the drive piston and damping piston (in a so-called “gear space"), with the piston crown of the drive piston and the piston crown of the damping piston each facing away from the closer shaft.
  • the overload valves can each open towards the drive-side pressure chamber or the damping-side pressure chamber. This makes it possible to relieve pressure in the gearbox compartment.
  • the drive piston and/or the damping piston can each have a control valve that is preloaded, in particular spring-loaded, in the closed position, the control valve being arranged in a further valve channel (formed in the piston in question, i.e. in the drive piston or in the damping piston) and on Piston crown opens out, wherein the control valve has an opening direction that faces away from the piston crown.
  • the control valve(s) open away from the piston crown and thus towards the transmission chamber.
  • the control valves each allow fluid (e.g. an oil) to flow back from the drive-side pressure chamber or from the damping-side pressure chamber into the transmission chamber.
  • FIG. 1 A door closer is shown, which is designated overall by the reference number 10.
  • the door closer 10 is used to operate, in particular to close, a leaf of a door (not shown).
  • the door closer 10 has a door closer housing 12, which extends essentially along a door closer axis 14.
  • the door closer housing 12 is closed at its side ends by means of closure covers 16, 18. Furthermore, the door closer housing 12 is filled with a fluid, for example a hydraulic oil (not shown in detail).
  • the door closer 10 has a closer shaft 20, which is arranged in a gear room 22 of the door closer 12.
  • the closer shaft 20 extends along a Closer shaft axis 24, which is preferably oriented orthogonally to the door closer axis 14.
  • the closer shaft 20 is rotatably mounted on the door closer housing 12 about the closer shaft axis 24.
  • the closer shaft 20 has a cam disk 26 which is connected to the closer shaft 20 in a rotationally fixed manner.
  • the cam 26 in turn has a drive contour 28 and a damping contour 30.
  • the closer shaft 20 has engagement sections 36 protruding from the door closer housing 12 at its output-side ends, which are designed as a polygon, for example as a square.
  • the closer shaft 20 can be coupled to a leaf of a door via the attack sections 36 by means of a closer linkage (not shown).
  • the closer linkage can, for example, be guided in a leaf-side slide rail.
  • the door closer 10 also includes a drive device 38, which is arranged between the closer shaft 20 and a first (drive-side) closure cover 16 in the door closer housing 12 (in Fig.1 right).
  • the drive device 38 has a drive piston 40 (spring piston) which is slidably guided on the inner wall of the door closer housing 12 along the door closer axis 14 along the double arrow 44.
  • the drive piston 40 is arranged on the closer shaft side.
  • the drive piston 40 and the first closure cover 16 are spaced apart from one another along the door closer axis 14 arranged and, together with the door closer housing 12, delimit a drive-side pressure chamber 46.
  • Valve channels are formed in the drive piston 40, via which the drive-side pressure chamber 46 can be fluidly connected to the gearbox chamber 22. This will be described further below.
  • a spring 48 in particular a compression spring, is arranged in the drive-side pressure chamber 46.
  • a further spring 50 in particular a compression spring, can be arranged in the drive-side pressure chamber 46, which is connected in parallel to the spring 48.
  • the further spring 50 is arranged radially within the spring 48.
  • the spring 48 is supported relative to the drive-side closure cover 16 via a spring plate 52 and the further spring 50 via a threaded section 54.
  • the drive piston 40 and its drive roller 56 (cf. Fig.3b, 3d ) in the direction of the closer shaft 20, so that the drive roller 56 always rests on the drive contour 28.
  • the door closer 10 further comprises a damping device 60 (cf. Fig.1 ), which is arranged between the closer shaft 20 and a second (damping side) closure cover 18 in the door closer housing 12 (in Fig.1 Left).
  • a damping device 60 cf. Fig.1
  • the door closer 10 further comprises a damping device 60 (cf. Fig.1 ), which is arranged between the closer shaft 20 and a second (damping side) closure cover 18 in the door closer housing 12 (in Fig.1 Left).
  • the damping device 60 has a damping piston 62, which is slidably guided on the inner wall of the door closer housing 12 along the door closer axis 14 along the double arrow 44.
  • a Damping-side pressure chamber 64 is arranged, which extends between the second closure cap 18 and the damping piston 62.
  • Valve channels are formed in the damping piston 62, via which the damping-side pressure chamber 64 can be fluidly connected to the gear chamber 22. This will be described further below.
  • the damping device 60 also has a tracking spring 66.
  • the tracking spring 66 is preferably arranged on the second (damping side) closure cover 18 and tensioned between the closure cover 18 and the damping piston 62.
  • the damping piston 62 and its damping roller 68 (cf. Fig.2b, 2d ) in the direction of the closer shaft 20, so that the damping roller 68 always rests on the damping contour 30.
  • the damping piston 62 is described in more detail below (cf. Fig.2a to 2d ).
  • the damping piston 62 has the above-mentioned damping roller 68, which is arranged in a corresponding recess 69 on the damping piston 62 and is arranged via axle sections 70 in axle receiving sections 72 and is rotatably mounted on the damping piston 62 about a roller axis 74.
  • the damping piston 62 On its circumference, the damping piston 62 has at least largely, preferably completely, circumferential sliding or guide rings 76. In addition, the damping piston 62 has a sealing arrangement 78 on its circumference, which is formed, for example, from an internal O-ring 80 and an external sealing ring 82.
  • the damping piston 62 also includes an overload valve 84.
  • the overload valve 84 has a valve channel 88 formed in the damping piston 62 and extending along a channel axis 86, a locking body 90 and a sealing seat 91. Via the valve channel 88 - if the locking body 90 does not rest on the sealing seat 91 - a flow connection can be established between the recess 69 and an area on the piston crown 93 of the damping piston 62.
  • the locking body 90 is accommodated in a locking body receiving section 92 in the valve channel 88 and lies sealingly against the sealing seat 91 when the overload valve 84 is closed.
  • the valve channel 88 has an n-shaped cross section (inner cross section) in the locking body receiving section 92.
  • n 4
  • the locking body receiving section 92 has a square cross section.
  • optional roundings 99 (“grooves”) are formed in the blocking body receiving section 92, for example.
  • the locking body 90 is spherical, therefore designed as a ball.
  • the locking body 90 is dimensioned such that the locking body 90 is guided without play in the locking body receiving section 92 orthogonally or laterally to the channel axis 86. In other words, the spherical locking body 90 rests on the four inner surfaces of the locking body receiving section 92 at corresponding contact points 97.
  • the length of the locking body receiving section 92 along the channel axis 86 is dimensioned such that the locking body 90 can be displaced from the sealing seat 91 (closed state of the overload valve 84) in the locking body receiving section 92 by a distance of 0.6mm to 1.3mm (open state of the overload valve 84).
  • the sealing seat 91 is formed by a shoulder 94 in the valve channel 88, through which the cross section of the valve channel 88 is reduced in relation to the locking body receiving section 92.
  • the side edges 95 of the locking body receiving section 92 at the end of the locking body receiving section 92 facing away from the sealing seat 91 are formed or embossed in such a way that the cross section of the valve channel 88 on the side edges 95 is reduced in relation to the cross section of the locking body receiving section 92. This limits the displacement of the locking body 90 away from the sealing seat 91 in the locking body receiving section 92.
  • the damping piston 62 faces the pressure chamber 64 on the damping side with its piston crown 93 (cf. Fig.1 ), whereby the opening direction of the overload valve 84 of the damping piston 62 faces the pressure chamber 64 on the damping side.
  • the overload valve 84 opens towards the pressure chamber 64 on the damping side when appropriate pressure is applied.
  • the damping piston 62 also has a control valve 96 which is preloaded in the closed position, in the example spring-loaded (cf. Fig.2b ).
  • the control valve 96 is arranged in a further valve channel 98 and opens at the piston crown 93, with the control valve 96 having an opening direction which faces away from the piston crown 93. In other words, the control valve 96 opens towards the gearbox chamber 22 when appropriate pressure is applied.
  • the drive piston 40 is described in more detail below (cf. Fig.3a to 3d ), which is designed largely analogously to the damping piston 62.
  • the drive piston 40 has the above-mentioned drive roller 56, which is arranged in a corresponding recess 100 on the drive piston 40 and is arranged via axle sections 102 in axle receiving sections 104 and is rotatably mounted on the drive piston 40 about a roller axis 106.
  • the drive piston 40 On its circumference, the drive piston 40 has at least largely, preferably completely, circumferential sliding or guide rings 108.
  • the drive piston 40 has a sealing arrangement 110 on its circumference, which is formed, for example, from an internal O-ring 112 and an external sealing ring 114.
  • the drive piston 40 also includes an overload valve 116.
  • the overload valve 116 has a valve channel 120 formed in the drive piston 40 and extending along a channel axis 118, a locking body 122 and a sealing seat 124. Via the valve channel 120 - if the locking body 122 does not rest on the sealing seat 124 - a flow connection can be established between the recess 100 and an area on the piston crown 126 of the drive piston 40.
  • the locking body 122 is accommodated in a locking body receiving section 128 in the valve channel 120 and lies sealingly against the sealing seat 124 when the overload valve 116 is closed.
  • the valve channel 120 has an n-shaped cross section (inner cross section) in the locking body receiving section 128.
  • n 4
  • the locking body receiving section 128 has a square cross section.
  • optional roundings 130 are formed in the blocking body receiving section 128, for example.
  • the locking body 122 is spherical, therefore designed as a ball.
  • the locking body 122 is dimensioned such that the locking body 122 is guided without play in the locking body receiving section 128 orthogonally or laterally to the channel axis 118. In other words, the spherical locking body 122 rests on the four inner surfaces of the locking body receiving section 128 at corresponding contact points 129.
  • the length of the locking body receiving section 128 along the channel axis 188 is dimensioned such that the locking body 122 can be displaced in the locking body receiving section 128 by a distance of 0.6mm to 1.3mm starting from the sealing seat 124 (closed state of the overload valve 116) (open state of the overload valve 116).
  • the sealing seat 124 is formed by a shoulder 131 in the valve channel 120, through which the cross section of the valve channel 120 is reduced in relation to the locking body receiving section 128.
  • Locking body receiving section 128 are formed or embossed in such a way that the cross section of the valve channel 120 at the side edges 132 is reduced in relation to the cross section of the locking body receiving section 128. This limits a displacement of the locking body 122 away from the sealing seat 124 in the locking body receiving section 128.
  • the drive piston 40 faces the drive-side pressure chamber 46 with its piston crown 126 (cf. Fig.1 ), wherein the opening direction of the overload valve 116 of the drive piston 40 faces the drive-side pressure chamber 46.
  • the overload valve 116 opens towards the drive-side pressure chamber 46 when appropriate pressure is applied.
  • the drive piston 40 also has a control valve 134 which is preloaded in the closed position, in the example spring-loaded (cf. Fig.3b ).
  • the control valve 134 is arranged in a further valve channel 136 and opens at the piston crown 126, the control valve 134 having an opening direction that faces away from the piston crown 126. In other words, the control valve 134 opens towards the gearbox chamber 22 when appropriate pressure is applied.
  • the square cross section of the locking body receiving section 92, 128 and the spherical locking body 90, 122 in the example enable precise positioning of the locking body 90, 122 relative to the sealing seat 91, 124 or to the valve opening, with sufficiently large outflow openings 89, 138 (space between Outer contour of the locking body and the inner contour of the locking body receiving section) remain for the fluid.

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  • Fluid-Damping Devices (AREA)

Description

Die Erfindung betrifft einen Türschließer mit den Merkmalen des Oberbegriffs von Anspruch 1.The invention relates to a door closer with the features of the preamble of claim 1.

Türschließer der eingangs genannten Art sind aus dem Stand der Technik bekannt, bspw. aus DE 20 2012 003 928 U1 . Mit einem derartigen Türschließer ist eine Betätigung eines Türflügels möglich, so dass dieser ausgehend von unterschiedlichen Öffnungswinkeln in Geschlossenlage überführt werden kann. Für die Funktion des Türschließers, einen Türflügel zuverlässig in die Schließlage überführen zu können, und für die Sicherheit (Überlastsituationen) sind die in Dämpfungskolben und Antriebskolben angeordneten Ventile von Bedeutung. Diese dienen zur Regelung des Fluidstroms zwischen einem Teil des mit dem Fluid (bspw. einem Hydrauliköl) gefüllten Innenraums und einem weiteren Teil des Innenraums des Türschließers. Die Überlastventile an Antriebskolben und Dämpfungskolben dienen dazu, Überlastsituationen abzubauen oder zu vermeiden, so dass Schäden am Türschließer verhindert werden können. Bei einer konstruktiven Vereinfachung der Überlastventile besteht regelmäßig die Gefahr von Fehlfunktionen, bspw. durch Undichtigkeit.Door closers of the type mentioned are known from the prior art, for example DE 20 2012 003 928 U1 . With such a door closer, it is possible to operate a door leaf so that it can be moved into the closed position starting from different opening angles. The valves arranged in the damping pistons and drive pistons are important for the function of the door closer, to be able to reliably move a door leaf into the closed position, and for safety (overload situations). These are used to regulate the fluid flow between part of the with the fluid (e.g. a hydraulic oil) filled interior and another part of the interior of the door closer. The overload valves on the drive piston and damping piston serve to reduce or avoid overload situations so that damage to the door closer can be prevented. If the design of the overload valves is simplified, there is often a risk of malfunctions, for example due to leaks.

Die WO2019/076746 offenbart einen Türschließer mit einem Überlastventil.The WO2019/076746 discloses a door closer with an overload valve.

Der Erfindung liegt die Aufgabe zugrunde, einen Türschließer mit konstruktiv einfachen und dennoch zuverlässig arbeitenden Überlastventilen anzugeben.The invention is based on the object of specifying a door closer with structurally simple yet reliably operating overload valves.

Die Erfindung löst diese Aufgabe durch einen Türschließer mit den Merkmalen des Anspruchs 1.The invention solves this problem by a door closer with the features of claim 1.

Der Türschließer ist zur Betätigung eines Flügels einer Tür, eines Fensters oder dgl. eingerichtet und/oder bestimmt. Der Türschließer weist eine Schließerwelle und eine drehfest mit der Schließerwelle verbundene Kurvenscheibe auf, wobei die Kurvenscheibe, insbesondere über eine Antriebskontur, mit einer Antriebseinrichtung umfassend einen Antriebskolben und, insbesondere über eine Dämpfungskontur, mit einer Dämpfungseinrichtung umfassend einen Dämpfungskolben zusammenwirkt.The door closer is set up and/or intended to operate a leaf of a door, a window or the like. The door closer has a closer shaft and a cam disc connected in a rotationally fixed manner to the closer shaft, the cam disc interacting, in particular via a drive contour, with a drive device comprising a drive piston and, in particular via a damping contour, with a damping device comprising a damping piston.

Der Antriebskolben und/oder der Dämpfungskolben weist bzw. weisen jeweils ein Überlastventil auf. Das Überlastventil weist jeweils einen sich entlang einer Kanalachse erstreckenden Ventilkanal (im betreffenden Kolben, d.h. im Antriebskolben bzw. im Dämpfungskolben ausgebildet), einen Sperrkörper und einen Dichtsitz auf. Der Sperrkörper ist in einem Sperrkörperaufnahmeabschnitt im Ventilkanal aufgenommen und liegt im geschlossenen Zustand des Überlastventils am Dichtsitz insbesondere abdichtend an. Der Ventilkanal weist zumindest im Sperrkörperaufnahmeabschnitt, vorzugsweise entlang des gesamten Ventilkanals, einen n-eckigen Querschnitt (Innenquerschnitt) mit n ≥ 3 auf. Der Sperrkörper ist kugelförmig oder zylindrisch ausgebildet. Mit anderen Worten kann der Sperrkörper als Kugel oder Drehteil bzw. als Zylinder ausgebildet sein, insbesondere als senkrechter Kreiszylinder.The drive piston and/or the damping piston each has/have an overload valve. The overload valve each has a valve channel extending along a channel axis (formed in the relevant piston, ie in the drive piston or in the damping piston), a blocking body and a sealing seat. The locking body is in accommodated in a locking body receiving section in the valve channel and rests against the sealing seat in a particularly sealing manner when the overload valve is closed. The valve channel has an n-angular cross section (inner cross section) with n ≥ 3 at least in the locking body receiving section, preferably along the entire valve channel. The locking body is spherical or cylindrical. In other words, the locking body can be designed as a ball or rotating part or as a cylinder, in particular as a vertical circular cylinder.

Durch die vorgeschlagene Ausgestaltung lässt sich eine genaue Positionierung des Sperrkörpers relativ zum Dichtsitz bzw. zur Ventilöffnung erzielen, wobei dadurch, dass die Querschnitte des Sperrkörpers (kugelförmig oder zylindrisch) und des Sperrkörperaufnahmeabschnitts bzw. des Ventilkanals (n-eckig mit n ≥ 3) sich voneinander unterscheiden, in den Eckbereichen des n-eckigen Querschnitts hinreichende Ausströmungsöffnungen verbleiben. Dies ist eine konstruktiv besonders einfache Ausgestaltung, die sogar einen Einsatz von Normkörpern erlaubt, bspw. einer Kugel.The proposed design makes it possible to achieve precise positioning of the locking body relative to the sealing seat or the valve opening, whereby the cross sections of the locking body (spherical or cylindrical) and the locking body receiving section or the valve channel (n-angular with n ≥ 3) are the same differ from each other, sufficient outflow openings remain in the corner areas of the n-angular cross section. This is a particularly simple design that even allows the use of standard bodies, for example a ball.

Der Sperrkörper ist insbesondere derart auf den Sperrkörperaufnahmeabschnitt abgestimmt, dass sich der Sperrkörper im Ventilkanal entlang des Sperrkörperabschnitts bewegen kann, insbesondere entlang der Kanalachse abrollen kann. Dadurch kann ein sogen. "Heiligenschein", wie dieser bei Sperrkörpern auftritt, die nicht entlang der Kanalachse abrollen können, vermieden werden. Der Sperrkörper kann beim Abrollen an zumindest zwei Innenflächen des n-eckigen Querschnitts des Sperrkörperaufnahmeabschnitts oder des Ventilkanals anliegen.The locking body is in particular matched to the locking body receiving section in such a way that the locking body can move in the valve channel along the locking body section, in particular can roll along the channel axis. This allows a so-called "Halo", as occurs with barrier bodies that cannot roll along the channel axis, can be avoided. When rolling, the blocking body can rest on at least two inner surfaces of the n-angular cross section of the blocking body receiving section or of the valve channel.

Im Rahmen einer bevorzugten Ausgestaltung kann der Sperrkörper derart dimensioniert sein, dass der Sperrkörper im Sperrkörperaufnahmeabschnitt orthogonal zur Kanalachse bzw. lateral spielfrei geführt ist. Somit ist der Sperrkörper axial entlang der Kanalachse beweglich, bspw. durch Abrollen, erfährt jedoch kein laterales Spiel. Mangels lateralem Spiel kommt der Sperrkörper stets zentriert auf dem Dichtsitz zu liegen. Dies trägt zu einer zuverlässigen Abdichtung im geschlossenen Zustand des Überlastventils bei.As part of a preferred embodiment, the locking body can be dimensioned such that the locking body is guided in the locking body receiving section orthogonally to the channel axis or laterally without play. The blocking body is therefore axially movable along the channel axis, for example by rolling, but does not experience any lateral play. Due to the lack of lateral play, the locking body always lies centered on the sealing seat. This contributes to a reliable seal when the overload valve is closed.

Vorzugsweise kann beim n-eckigen Querschnitt des Ventilkanals (Innenquerschnitt) n ≥ 3 und n ≤ 8 beitragen (3 ≤ n ≤ 8). Dadurch stehen mit den Innenflächen des Ventilkanals genügend Anlageflächen für den Sperrkörper zur Verfügung, wobei in den Eckbereichen hinreichende Ausströmungsöffnungen verbleiben.Preferably, in the case of an n-angular cross section of the valve channel (inner cross section), n ≥ 3 and n ≤ 8 can contribute (3 ≤ n ≤ 8). As a result, the inner surfaces of the valve channel provide sufficient contact surfaces for the blocking body, with sufficient outflow openings remaining in the corner areas.

Im Konkreten kann der Ventilkanal zumindest im Sperrkörperaufnahmeabschnitt, vorzugsweise entlang des gesamten Ventilkanals, einen quadratischen Querschnitt aufweisen. Dies begünstigt die Flexibilität hinsichtlich der Auswahl von Sperrkörpern, da mittels des quadratischen Querschnitts sowohl kugelförmige als auch zylindrische Sperrkörper geführt werden können.Specifically, the valve channel can have a square cross section at least in the blocking body receiving section, preferably along the entire valve channel. This promotes flexibility with regard to the selection of locking bodies, since both spherical and cylindrical locking bodies can be guided using the square cross section.

Bei lateral spielfreier Ausgestaltung kann der kugelförmige Sperrkörper (Kugel) an den vier Innenflächen des Sperrkörperaufnahmeabschnitts oder des Ventilkanals anliegen. Der zylindrische Sperrkörper kann bei lateral spielfreier Ausgestaltung an zwei einander gegenüberliegenden Innenflächen des Sperrkörperaufnahmeabschnitts oder des Ventilkanals anliegen.In the case of a design with no lateral play, the spherical locking body (ball) can rest on the four inner surfaces of the locking body receiving section or the valve channel. The cylindrical locking body can rest on two opposing inner surfaces of the locking body receiving section or the valve channel if it is designed to be free of lateral play.

Es ist denkbar, dass bei quadratischem Querschnitt des Sperrkörperaufnahmeabschnitts bzw. des Ventilkanals die Eckbereiche zwischen aneinander angrenzenden Innenflächen als 90°-Winkel ausgebildet sind. Dies maximiert den freibleibenden Querschnitt der Ausströmungsöffnungen.It is conceivable that if the blocking body receiving section or the valve channel has a square cross section, the corner regions between adjacent inner surfaces are designed as 90° angles. This maximizes the free cross section of the outflow openings.

Alternativ hierzu können bei quadratischem Querschnitt des Sperrkörperaufnahmeabschnitts bzw. des Ventilkanals in den Eckbereichen zwischen aneinander angrenzenden Innenflächen optionale Abrundungen ("Hohlkehlen") ausgebildet sein. Dies reduziert die in den Eckbereichen auftretende Kerbwirkung. Zudem kann die Herstellung des Sperrkörperaufnahmeabschnitts bzw. des Ventilkanals, bspw. durch Verwendung von im Durchmesser größeren Fräswerkzeugen, vereinfacht werden.Alternatively, if the blocking body receiving section or the valve channel has a square cross section, optional roundings (“grooves”) can be formed in the corner regions between adjacent inner surfaces. This reduces the notch effect that occurs in the corner areas. In addition, the production of the locking body receiving section or the valve channel can be simplified, for example by using milling tools with a larger diameter.

Im Rahmen einer bevorzugten Ausgestaltung kann die Länge des Sperrkörperaufnahmeabschnitts entlang der Kanalachse derart dimensioniert sein, dass der Sperrkörper ausgehend von dem Dichtsitz (geschlossener Zustand des Überlastventils) im Sperrkörperaufnahmeabschnitt um eine Strecke von 0,6 mm bis 1,3 mm (Millimeter) verlagert werden kann (geöffneter Zustand des Überlastventils). Dies gibt am Überlastventil einen hinreichenden Öffnungsquerschnitt zwischen Dichtsitz und Sperrkörper frei, so dass das im Innenraum des Türschließers enthaltene Fluid (bspw. ein Öl) durch das Überlastventil strömen kann.As part of a preferred embodiment, the length of the locking body receiving section along the channel axis can be dimensioned such that the locking body is displaced from the sealing seat (closed state of the overload valve) in the locking body receiving section by a distance of 0.6 mm to 1.3 mm (millimeters). (open state of the overload valve). This releases a sufficient opening cross-section between the sealing seat and the blocking body on the overload valve, so that the fluid contained in the interior of the door closer (e.g. an oil) can flow through the overload valve.

Im Konkreten kann der Dichtsitz durch einen Absatz im Ventilkanal ausgebildet sein, durch den der Querschnitt des Ventilkanals bezogen auf den Sperrkörperaufnahmeabschnitt reduziert ist. Dadurch kann mit einfachen Mitteln ein Dichtsitz ausgebildet werden. Im Konkreten kann das Innenmaß oder der Innendurchmesser des Ventilkanals am Absatz geringer sein als die Außenabmessungen, bspw. der Durchmesser, des Sperrkörpers.Specifically, the sealing seat can be formed by a shoulder in the valve channel, through which the cross section of the valve channel is reduced in relation to the locking body receiving section. This means you can use simple means Sealing seat can be formed. Specifically, the internal dimension or the internal diameter of the valve channel at the shoulder can be smaller than the external dimensions, for example the diameter, of the locking body.

In vorteilhafter Weise können die Seitenkanten des Sperrkörperaufnahmeabschnitts am vom Dichtsitz abgewandten Ende des Sperrkörperaufnahmeabschnitts derart umgeformt, insbesondere verprägt, sein, dass der Querschnitt des Ventilkanals an den Seitenkanten bezogen auf den Querschnitt des Sperrkörperaufnahmeabschnitts reduziert ist. Dadurch lässt sich ein konstruktiv einfacher Anschlag ausbilden, mit dem die Verlagerung des Sperrkörpers vom Dichtsitz weg begrenzt werden kann. Zudem lässt sich so eine Verliersicherung für den Sperrkörper erzielen. Der Querschnitt des Ventilkanals ist an den Seitenkanten bezogen auf den Querschnitt des Sperrkörperaufnahmeabschnitts insbesondere derart reduziert, dass der Sperrkörper am vom Dichtsitz abgewandten Ende nicht aus dem Sperrkörperaufnahmeabschnitt gelangen kann.Advantageously, the side edges of the locking body receiving section at the end of the locking body receiving section facing away from the sealing seat can be shaped, in particular embossed, in such a way that the cross section of the valve channel on the side edges is reduced in relation to the cross section of the locking body receiving section. This makes it possible to form a structurally simple stop with which the displacement of the locking body away from the sealing seat can be limited. In addition, a captive protection can be achieved for the locking body. The cross section of the valve channel is reduced at the side edges in relation to the cross section of the locking body receiving section in particular in such a way that the locking body cannot get out of the locking body receiving section at the end facing away from the sealing seat.

Im Rahmen einer bevorzugten Ausgestaltung kann der Antriebskolben mit seinem Kolbenboden einem antriebsseitigen Druckraum zugewandt sein und/oder der Dämpfungskolben kann mit seinem Kolbenboden einem dämpfungsseitigen Druckraum zugewandt sein. Die Öffnungsrichtung des Überlastventils des Antriebskolbens ist dem antriebsseitigen Druckraum zugewandt (Ventil öffnet zum antriebsseitigen Druckraum hin). Alternativ oder ergänzend ist die Öffnungsrichtung des Überlastventils des Dämpfungskolbens dem dämpfungsseitigen Druckraum zugewandt (Ventil öffnet zum dämpfungsseitigen Druckraum hin). Somit kann ein im Innenraum, insbesondere zwischen dem Dämpfungskolben und dem Antriebskolben herrschender Überdruck zum dämpfungsseitigen Druckraum bzw. zum antriebsseitigen Druckraum hin abgebaut werden.As part of a preferred embodiment, the drive piston can face a pressure chamber on the drive side with its piston crown and/or the damping piston can face a pressure chamber on the damping side with its piston crown. The opening direction of the overload valve of the drive piston faces the drive-side pressure chamber (valve opens towards the drive-side pressure chamber). Alternatively or additionally, the opening direction of the overload valve of the damping piston faces the pressure chamber on the damping side (valve opens towards the pressure chamber on the damping side). This means that an excess pressure prevailing in the interior, in particular between the damping piston and the drive piston be reduced to the pressure chamber on the damping side or to the pressure chamber on the drive side.

Die Schließerwelle ist insbesondere zwischen dem Antriebskolben und Dämpfungskolben angeordnet (in einem sogen. "Getrieberaum"), wobei der Kolbenboden des Antriebskolbens und der Kolbenboden des Dämpfungskolbens jeweils von der Schließerwelle abgewandt sind. Die Überlastventile können jeweils zum antriebsseitigen Druckraum bzw. zum dämpfungsseitigen Druckraum hin öffnen. Damit ist eine Druckentlastung des Getrieberaums möglich.The closer shaft is arranged in particular between the drive piston and damping piston (in a so-called "gear space"), with the piston crown of the drive piston and the piston crown of the damping piston each facing away from the closer shaft. The overload valves can each open towards the drive-side pressure chamber or the damping-side pressure chamber. This makes it possible to relieve pressure in the gearbox compartment.

Im Konkreten kann bzw. können der Antriebskolben und/oder der Dämpfungskolben jeweils ein in Schließstellung vorgespanntes, insbesondere federvorgespanntes, Regelventil aufweisen, wobei das Regelventil jeweils in einem weiteren Ventilkanal (im betreffenden Kolben ausgebildet, d.h. im Antriebskolben oder im Dämpfungskolben) angeordnet ist und am Kolbenboden ausmündet, wobei das Regelventil eine Öffnungsrichtung aufweist, die vom Kolbenboden abgewandt ist. Mit anderen Worten öffnen das bzw. die Regelventile vom Kolbenboden weg und somit zum Getrieberaum hin. Die Regelventile erlauben jeweils ein Zurückströmen von Fluid (bspw. einem Öl) vom antriebsseitigen Druckraum bzw. vom dämpfungsseitigen Druckraum in den Getrieberaum hinein.Specifically, the drive piston and/or the damping piston can each have a control valve that is preloaded, in particular spring-loaded, in the closed position, the control valve being arranged in a further valve channel (formed in the piston in question, i.e. in the drive piston or in the damping piston) and on Piston crown opens out, wherein the control valve has an opening direction that faces away from the piston crown. In other words, the control valve(s) open away from the piston crown and thus towards the transmission chamber. The control valves each allow fluid (e.g. an oil) to flow back from the drive-side pressure chamber or from the damping-side pressure chamber into the transmission chamber.

Die Erfindung wird nachfolgend anhand der Figuren näher erläutert, wobei gleiche oder funktional gleiche Elemente mit identischen Bezugszeichen versehen sind, ggf. jedoch lediglich einmal. Es zeigen:

Fig.1
ein Ausführungsbeispiel eines Türschließers in einer geschnittenen Ansicht;
Fig.2
den Dämpfungskolben des Türschließers aus Fig.1 in einer perspektivischen Ansicht (Fig.2a), einer Seitenansicht mit Halbschnitt (Fig.2b), einer Stirnansicht mit Blick auf den Kolbenboden (Fig.2c), und einer Schnittansicht gemäß einer in Fig.2b eingezeichneten Schnittachse A-A (Fig.2d); und
Fig.3
den Antriebskolben des Türschließers aus Fig.1 in einer perspektivischen Ansicht (Fig.3a), einer Seitenansicht mit Halbschnitt (Fig.3b), einer Stirnansicht mit Blick auf den Kolbenboden (Fig.3c), und einer Schnittansicht gemäß einer in Fig.3b eingezeichneten Schnittachse B-B (Fig.3d).
The invention is explained in more detail below with reference to the figures, with identical or functionally identical elements being provided with identical reference numbers, but if necessary only once. Show it:
Fig.1
an embodiment of a door closer in a sectional view;
Fig.2
the damping piston of the door closer Fig.1 in a perspective view ( Fig.2a ), a side view with half section ( Fig.2b ), a front view with a view of the piston crown ( Fig.2c ), and a sectional view according to one in Fig.2b marked cutting axis AA ( Fig.2d ); and
Fig.3
the drive piston of the door closer Fig.1 in a perspective view ( Fig.3a ), a side view with half section ( Fig.3b ), a front view with a view of the piston crown ( Fig.3c ), and a sectional view according to one in Fig.3b marked cutting axis BB ( Fig.3d ).

In Figur 1 ist ein Türschließer dargestellt, der insgesamt mit dem Bezugszeichen 10 bezeichnet ist. Der Türschließer 10 dient zur Betätigung, insbesondere zum Schließen, eines Flügels einer Tür (nicht dargestellt).In Figure 1 A door closer is shown, which is designated overall by the reference number 10. The door closer 10 is used to operate, in particular to close, a leaf of a door (not shown).

Der Türschließer 10 weist ein Türschließergehäuse 12 auf, welches sich im Wesentlichen entlang einer Türschließerachse 14 erstreckt. Das Türschließergehäuse 12 ist in seinen seitlichen Enden mittels Verschlussdeckeln 16, 18 verschlossen. Ferner ist das Türschließergehäuse 12 mit einem Fluid, bspw. einem Hydrauliköl, gefüllt (nicht näher gezeigt).The door closer 10 has a door closer housing 12, which extends essentially along a door closer axis 14. The door closer housing 12 is closed at its side ends by means of closure covers 16, 18. Furthermore, the door closer housing 12 is filled with a fluid, for example a hydraulic oil (not shown in detail).

Der Türschließer 10 weist eine Schließerwelle 20 auf, welche in einem Getrieberaum 22 des Türschließers 12 angeordnet ist. Die Schließerwelle 20 erstreckt sich entlang einer Schließerwellenachse 24, welche vorzugsweise orthogonal zur Türschließerachse 14 orientiert ist. Die Schließerwelle 20 ist um die Schließerwellenachse 24 drehbar am Türschließergehäuse 12 gelagert.The door closer 10 has a closer shaft 20, which is arranged in a gear room 22 of the door closer 12. The closer shaft 20 extends along a Closer shaft axis 24, which is preferably oriented orthogonally to the door closer axis 14. The closer shaft 20 is rotatably mounted on the door closer housing 12 about the closer shaft axis 24.

Weiter weist die Schließerwelle 20 eine drehfest mit der Schließerwelle 20 verbundene Kurvenscheibe 26 auf. Die Kurvenscheibe 26 weist ihrerseits eine Antriebskontur 28 und eine Dämpfungskontur 30 auf.Furthermore, the closer shaft 20 has a cam disk 26 which is connected to the closer shaft 20 in a rotationally fixed manner. The cam 26 in turn has a drive contour 28 and a damping contour 30.

Die Schließerwelle 20 weist an ihren abtriebsseitigen Enden aus dem Türschließergehäuse 12 herausragende Angriffsabschnitte 36 auf, welche als Mehrkant, bspw. als Vierkant ausgebildet sind. Über die Angriffsabschnitte 36 kann die Schließerwelle 20 mittels eines Schließergestänges an einen Flügel einer Tür gekoppelt sein (nicht dargestellt). Das Schließergestänge kann bspw. in einer flügelseitigen Gleitschiene geführt sein.The closer shaft 20 has engagement sections 36 protruding from the door closer housing 12 at its output-side ends, which are designed as a polygon, for example as a square. The closer shaft 20 can be coupled to a leaf of a door via the attack sections 36 by means of a closer linkage (not shown). The closer linkage can, for example, be guided in a leaf-side slide rail.

Der Türschließer 10 umfasst zudem eine Antriebseinrichtung 38, welche zwischen der Schließerwelle 20 und einem ersten (antriebsseitigen) Verschlussdeckel 16 im Türschließergehäuse 12 angeordnet ist (in Fig.1 rechts).The door closer 10 also includes a drive device 38, which is arranged between the closer shaft 20 and a first (drive-side) closure cover 16 in the door closer housing 12 (in Fig.1 right).

Die Antriebseinrichtung 38 weist einen Antriebskolben 40 (Federkolben) auf, welcher an der Innenwand des Türschließergehäuses 12 entlang der Türschließerachse 14 entlang des Doppelpfeils 44 verschiebbar geführt ist. Der Antriebskolben 40 ist schließerwellenseitig angeordnet.The drive device 38 has a drive piston 40 (spring piston) which is slidably guided on the inner wall of the door closer housing 12 along the door closer axis 14 along the double arrow 44. The drive piston 40 is arranged on the closer shaft side.

Der Antriebskolben 40 und der erste Verschlussdeckel 16 sind entlang der Türschließerachse 14 beabstandet zueinander angeordnet und begrenzen zusammen mit dem Türschließergehäuse 12 einen antriebsseitigen Druckraum 46. Im Antriebskolben 40 sind Ventilkanäle ausgebildet, über die der antriebsseitige Druckraum 46 mit dem Getrieberaum 22 strömungsverbunden werden kann. Dies wird weiter unten noch beschrieben.The drive piston 40 and the first closure cover 16 are spaced apart from one another along the door closer axis 14 arranged and, together with the door closer housing 12, delimit a drive-side pressure chamber 46. Valve channels are formed in the drive piston 40, via which the drive-side pressure chamber 46 can be fluidly connected to the gearbox chamber 22. This will be described further below.

Im antriebsseitigen Druckraum 46 ist eine Feder 48, insbesondere eine Druckfeder, angeordnet. Optional kann, wie hier im Beispiel, eine weitere Feder 50, insbesondere eine Druckfeder, im antriebsseitigen Druckraum 46 angeordnet sein, die zur Feder 48 parallel geschaltet ist. Im Beispiel ist die weitere Feder 50 radial innerhalb der Feder 48 angeordnet.A spring 48, in particular a compression spring, is arranged in the drive-side pressure chamber 46. Optionally, as in the example here, a further spring 50, in particular a compression spring, can be arranged in the drive-side pressure chamber 46, which is connected in parallel to the spring 48. In the example, the further spring 50 is arranged radially within the spring 48.

Die Feder 48 ist über einen Federteller 52 und die weitere Feder 50 über einen Gewindeabschnitt 54 relativ zum antriebsseitigen Verschlussdeckel 16 abgestützt. Mittels der Feder 48 und der optionalen weiteren Feder 50 ist der Antriebskolben 40 und dessen Antriebsrolle 56 (vgl. Fig.3b, 3d) in Richtung der Schließerwelle 20 kraftbeaufschlagt, so dass die Antriebsrolle 56 stets an der Antriebskontur 28 anliegt.The spring 48 is supported relative to the drive-side closure cover 16 via a spring plate 52 and the further spring 50 via a threaded section 54. By means of the spring 48 and the optional further spring 50, the drive piston 40 and its drive roller 56 (cf. Fig.3b, 3d ) in the direction of the closer shaft 20, so that the drive roller 56 always rests on the drive contour 28.

Der Türschließer 10 umfasst weiter eine Dämpfungseinrichtung 60 (vgl. Fig.1), welche zwischen der Schließerwelle 20 und einem zweiten (dämpfungsseitigen) Verschlussdeckel 18 im Türschließergehäuse 12 angeordnet ist (in Fig.1 links).The door closer 10 further comprises a damping device 60 (cf. Fig.1 ), which is arranged between the closer shaft 20 and a second (damping side) closure cover 18 in the door closer housing 12 (in Fig.1 Left).

Die Dämpfungseinrichtung 60 weist einen Dämpfungskolben 62 auf, welcher an der Innenwand des Türschließergehäuses 12 entlang der Türschließerachse 14 entlang des Doppelpfeils 44 verschiebbar geführt ist. An der von der Schließerwelle 20 abgewandten Seite des Dämpfungskolbens 62 ist ein dämpfungsseitiger Druckraum 64 angeordnet, welcher sich zwischen der zweiten Verschlusskappe 18 und dem Dämpfungskolben 62 erstreckt. Im Dämpfungskolben 62 sind Ventilkanäle ausgebildet, über die der dämpfungsseitige Druckraum 64 mit dem Getrieberaum 22 strömungsverbunden werden kann. Dies wird weiter unten noch beschrieben.The damping device 60 has a damping piston 62, which is slidably guided on the inner wall of the door closer housing 12 along the door closer axis 14 along the double arrow 44. On the side of the damping piston 62 facing away from the closer shaft 20 there is a Damping-side pressure chamber 64 is arranged, which extends between the second closure cap 18 and the damping piston 62. Valve channels are formed in the damping piston 62, via which the damping-side pressure chamber 64 can be fluidly connected to the gear chamber 22. This will be described further below.

Die Dämpfungseinrichtung 60 weist außerdem eine Nachführungsfeder 66 auf. Die Nachführungsfeder 66 ist vorzugsweise an dem zweiten (dämpfungsseitigen) Verschlussdeckel 18 angeordnet und zwischen dem Verschlussdeckel 18 und dem Dämpfungskolben 62 gespannt. Über die Nachführungsfeder 66 wird der Dämpfungskolben 62 und dessen Dämpfungsrolle 68 (vgl. Fig.2b, 2d) in Richtung der Schließerwelle 20 kraftbeaufschlagt, so dass die Dämpfungsrolle 68 stets an der Dämpfungskontur 30 anliegt.The damping device 60 also has a tracking spring 66. The tracking spring 66 is preferably arranged on the second (damping side) closure cover 18 and tensioned between the closure cover 18 and the damping piston 62. The damping piston 62 and its damping roller 68 (cf. Fig.2b, 2d ) in the direction of the closer shaft 20, so that the damping roller 68 always rests on the damping contour 30.

Nachfolgend wird der Dämpfungskolben 62 genauer beschrieben (vgl. Fig.2a bis 2d).The damping piston 62 is described in more detail below (cf. Fig.2a to 2d ).

Der Dämpfungskolben 62 weist die oben bereits genannte Dämpfungsrolle 68 auf, die in einer entsprechenden Ausnehmung 69 am Dämpfungskolben 62 angeordnet und über Achsabschnitte 70 in Achsaufnahmeabschnitten 72 angeordnet und um eine Rollenachse 74 drehbar am Dämpfungskolben 62 gelagert ist.The damping piston 62 has the above-mentioned damping roller 68, which is arranged in a corresponding recess 69 on the damping piston 62 and is arranged via axle sections 70 in axle receiving sections 72 and is rotatably mounted on the damping piston 62 about a roller axis 74.

An seinem Umfang weist der Dämpfungskolben 62 zumindest weitgehend, vorzugweise vollständig, umlaufende Gleit- bzw. Führungsringe 76 auf. Zudem weist der Dämpfungskolben 62 an seinem Umfang eine Dichtanordnung 78 auf, die bspw. aus einem innenliegenden O-Ring 80 und einem außenliegenden Dichtring 82 gebildet ist.On its circumference, the damping piston 62 has at least largely, preferably completely, circumferential sliding or guide rings 76. In addition, the damping piston 62 has a sealing arrangement 78 on its circumference, which is formed, for example, from an internal O-ring 80 and an external sealing ring 82.

Der Dämpfungskolben 62 umfasst außerdem ein Überlastventil 84. Das Überlastventil 84 weist einen im Dämpfungskolben 62 ausgebildeten und sich entlang einer Kanalachse 86 erstreckenden Ventilkanal 88, einen Sperrkörper 90 und einen Dichtsitz 91 auf. Über den Ventilkanal 88 kann - wenn der Sperrkörper 90 nicht auf dem Dichtsitz 91 aufliegt - eine Strömungsverbindung zwischen der Ausnehmung 69 und einem Bereich am Kolbenboden 93 des Dämpfungskolbens 62 hergestellt werden.The damping piston 62 also includes an overload valve 84. The overload valve 84 has a valve channel 88 formed in the damping piston 62 and extending along a channel axis 86, a locking body 90 and a sealing seat 91. Via the valve channel 88 - if the locking body 90 does not rest on the sealing seat 91 - a flow connection can be established between the recess 69 and an area on the piston crown 93 of the damping piston 62.

Der Sperrkörper 90 ist in einem Sperrkörperaufnahmeabschnitt 92 im Ventilkanal 88 aufgenommen und liegt im geschlossenen Zustand des Überlastventils 84 abdichtend am Dichtsitz 91 an. Der Ventilkanal 88 weist im Beispiel im Sperrkörperaufnahmeabschnitt 92 einen n-eckigen Querschnitt (Innenquerschnitt) auf. Im Beispiel beträgt n = 4, so dass der Sperrkörperaufnahmeabschnitt 92 einen quadratischen Querschnitt aufweist. In den Eckbereichen zwischen aneinander angrenzenden Innenflächen sind im Sperrkörperaufnahmeabschnitt 92 beispielhaft optionale Abrundungen 99 ("Hohlkehlen") ausgebildet. Der Sperrkörper 90 ist im Beispiel kugelförmig, mithin also als Kugel ausgebildet.The locking body 90 is accommodated in a locking body receiving section 92 in the valve channel 88 and lies sealingly against the sealing seat 91 when the overload valve 84 is closed. In the example, the valve channel 88 has an n-shaped cross section (inner cross section) in the locking body receiving section 92. In the example, n = 4, so that the locking body receiving section 92 has a square cross section. In the corner areas between adjacent inner surfaces, optional roundings 99 (“grooves”) are formed in the blocking body receiving section 92, for example. In the example, the locking body 90 is spherical, therefore designed as a ball.

Der Sperrkörper 90 ist derart dimensioniert, dass der Sperrkörper 90 im Sperrkörperaufnahmeabschnitt 92 orthogonal bzw. lateral zur Kanalachse 86 spielfrei geführt ist. Mit anderen Worten liegt der kugelförmige Sperrkörper 90 an den vier Innenflächen des Sperrkörperaufnahmeabschnitts 92 an entsprechenden Kontaktpunkten 97 an.The locking body 90 is dimensioned such that the locking body 90 is guided without play in the locking body receiving section 92 orthogonally or laterally to the channel axis 86. In other words, the spherical locking body 90 rests on the four inner surfaces of the locking body receiving section 92 at corresponding contact points 97.

Die Länge des Sperrkörperaufnahmeabschnitts 92 entlang der Kanalachse 86 ist derart dimensioniert, dass der Sperrkörper 90 ausgehend von dem Dichtsitz 91 (geschlossener Zustand des Überlastventils 84) im Sperrkörperaufnahmeabschnitt 92 um eine Strecke von 0,6mm bis 1,3mm verlagert werden kann (geöffneter Zustand des Überlastventils 84). Der Dichtsitz 91 ist durch einen Absatz 94 im Ventilkanal 88 ausgebildet, durch den der Querschnitt des Ventilkanals 88 bezogen auf den Sperrkörperaufnahmeabschnitt 92 reduziert ist.The length of the locking body receiving section 92 along the channel axis 86 is dimensioned such that the locking body 90 can be displaced from the sealing seat 91 (closed state of the overload valve 84) in the locking body receiving section 92 by a distance of 0.6mm to 1.3mm (open state of the overload valve 84). The sealing seat 91 is formed by a shoulder 94 in the valve channel 88, through which the cross section of the valve channel 88 is reduced in relation to the locking body receiving section 92.

Die Seitenkanten 95 des Sperrkörperaufnahmeabschnitts 92 am vom Dichtsitz 91 abgewandten Ende des Sperrkörperaufnahmeabschnitts 92 sind derart umgeformt bzw. verprägt, dass der Querschnitt des Ventilkanals 88 an den Seitenkanten 95 bezogen auf den Querschnitt des Sperrkörperaufnahmeabschnitts 92 reduziert ist. Dadurch wird im Sperrkörperaufnahmeabschnitt 92 eine Verlagerung des Sperrkörpers 90 vom Dichtsitz 91 weg begrenzt.The side edges 95 of the locking body receiving section 92 at the end of the locking body receiving section 92 facing away from the sealing seat 91 are formed or embossed in such a way that the cross section of the valve channel 88 on the side edges 95 is reduced in relation to the cross section of the locking body receiving section 92. This limits the displacement of the locking body 90 away from the sealing seat 91 in the locking body receiving section 92.

Im montierten Zustand ist der Dämpfungskolben 62 mit seinem Kolbenboden 93 dem dämpfungsseitigen Druckraum 64 zugewandt (vgl. Fig.1), wobei die Öffnungsrichtung des Überlastventils 84 des Dämpfungskolbens 62 dem dämpfungsseitigen Druckraum 64 zugewandt ist. Mit anderen Worten öffnet sich das Überlastventil 84 bei entsprechender Beaufschlagung zum dämpfungsseitigen Druckraum 64 hin.In the assembled state, the damping piston 62 faces the pressure chamber 64 on the damping side with its piston crown 93 (cf. Fig.1 ), whereby the opening direction of the overload valve 84 of the damping piston 62 faces the pressure chamber 64 on the damping side. In other words, the overload valve 84 opens towards the pressure chamber 64 on the damping side when appropriate pressure is applied.

Der Dämpfungskolben 62 weist weiter ein in Schließstellung vorgespanntes, im Beispiel federvorgespanntes, Regelventil 96 auf (vgl. Fig.2b). Das Regelventil 96 ist jeweils in einem weiteren Ventilkanal 98 angeordnet und mündet am Kolbenboden 93 aus, wobei das Regelventil 96 eine Öffnungsrichtung aufweist, die vom Kolbenboden 93 abgewandt ist. Mit anderen Worten öffnet sich das Regelventil 96 bei entsprechender Beaufschlagung zum Getrieberaum 22 hin.The damping piston 62 also has a control valve 96 which is preloaded in the closed position, in the example spring-loaded (cf. Fig.2b ). The control valve 96 is arranged in a further valve channel 98 and opens at the piston crown 93, with the control valve 96 having an opening direction which faces away from the piston crown 93. In other words, the control valve 96 opens towards the gearbox chamber 22 when appropriate pressure is applied.

Nachfolgend wird der Antriebskolben 40 genauer beschrieben (vgl. Fig.3a bis 3d), der weitgehend analog zum Dämpfungskolben 62 ausgebildet ist.The drive piston 40 is described in more detail below (cf. Fig.3a to 3d ), which is designed largely analogously to the damping piston 62.

Der Antriebskolben 40 weist die oben bereits genannte Antriebsrolle 56 auf, die in einer entsprechenden Ausnehmung 100 am Antriebskolben 40 angeordnet und über Achsabschnitte 102 in Achsaufnahmeabschnitten 104 angeordnet und um eine Rollenachse 106 drehbar am Antriebskolben 40 gelagert ist.The drive piston 40 has the above-mentioned drive roller 56, which is arranged in a corresponding recess 100 on the drive piston 40 and is arranged via axle sections 102 in axle receiving sections 104 and is rotatably mounted on the drive piston 40 about a roller axis 106.

An seinem Umfang weist der Antriebskolben 40 zumindest weitgehend, vorzugweise vollständig, umlaufende Gleit- bzw. Führungsringe 108 auf. Zudem weist der Antriebskolben 40 an seinem Umfang eine Dichtanordnung 110 auf, die bspw. aus einem innenliegenden O-Ring 112 und einem außenliegenden Dichtring 114 gebildet ist.On its circumference, the drive piston 40 has at least largely, preferably completely, circumferential sliding or guide rings 108. In addition, the drive piston 40 has a sealing arrangement 110 on its circumference, which is formed, for example, from an internal O-ring 112 and an external sealing ring 114.

Der Antriebskolben 40 umfasst außerdem ein Überlastventil 116. Das Überlastventil 116 weist einen im Antriebskolben 40 ausgebildeten und sich entlang einer Kanalachse 118 erstreckenden Ventilkanal 120, einen Sperrkörper 122 und einen Dichtsitz 124 auf. Über den Ventilkanal 120 kann - wenn der Sperrkörper 122 nicht auf dem Dichtsitz 124 aufliegt - eine Strömungsverbindung zwischen der Ausnehmung 100 und einem Bereich am Kolbenboden 126 des Antriebskolbens 40 hergestellt werden.The drive piston 40 also includes an overload valve 116. The overload valve 116 has a valve channel 120 formed in the drive piston 40 and extending along a channel axis 118, a locking body 122 and a sealing seat 124. Via the valve channel 120 - if the locking body 122 does not rest on the sealing seat 124 - a flow connection can be established between the recess 100 and an area on the piston crown 126 of the drive piston 40.

Der Sperrkörper 122 ist in einem Sperrkörperaufnahmeabschnitt 128 im Ventilkanal 120 aufgenommen und liegt im geschlossenen Zustand des Überlastventils 116 abdichtend am Dichtsitz 124 an. Der Ventilkanal 120 weist im Beispiel im Sperrkörperaufnahmeabschnitt 128 einen n-eckigen Querschnitt (Innenquerschnitt) auf. Im Beispiel beträgt n = 4, so dass der Sperrkörperaufnahmeabschnitt 128 einen quadratischen Querschnitt aufweist. In den Eckbereichen zwischen aneinander angrenzenden Innenflächen sind im Sperrkörperaufnahmeabschnitt 128 beispielhaft optionale Abrundungen 130 ("Hohlkehlen") ausgebildet. Der Sperrkörper 122 ist im Beispiel kugelförmig, mithin also als Kugel ausgebildet.The locking body 122 is accommodated in a locking body receiving section 128 in the valve channel 120 and lies sealingly against the sealing seat 124 when the overload valve 116 is closed. In the example, the valve channel 120 has an n-shaped cross section (inner cross section) in the locking body receiving section 128. In the example, n = 4, so that the locking body receiving section 128 has a square cross section. In the corner areas between adjacent inner surfaces, optional roundings 130 (“grooves”) are formed in the blocking body receiving section 128, for example. In the example, the locking body 122 is spherical, therefore designed as a ball.

Der Sperrkörper 122 ist derart dimensioniert, dass der Sperrkörper 122 im Sperrkörperaufnahmeabschnitt 128 orthogonal bzw. lateral zur Kanalachse 118 spielfrei geführt ist. Mit anderen Worten liegt der kugelförmige Sperrkörper 122 an den vier Innenflächen des Sperrkörperaufnahmeabschnitts 128 an entsprechenden Kontaktpunkten 129 an.The locking body 122 is dimensioned such that the locking body 122 is guided without play in the locking body receiving section 128 orthogonally or laterally to the channel axis 118. In other words, the spherical locking body 122 rests on the four inner surfaces of the locking body receiving section 128 at corresponding contact points 129.

Die Länge des Sperrkörperaufnahmeabschnitts 128 entlang der Kanalachse 188 ist derart dimensioniert, dass der Sperrkörper 122 ausgehend von dem Dichtsitz 124 (geschlossener Zustand des Überlastventils 116) im Sperrkörperaufnahmeabschnitt 128 um eine Strecke von 0,6mm bis 1,3mm verlagert werden kann (geöffneter Zustand des Überlastventils 116). Der Dichtsitz 124 ist durch einen Absatz 131 im Ventilkanal 120 ausgebildet, durch den der Querschnitt des Ventilkanals 120 bezogen auf den Sperrkörperaufnahmeabschnitt 128 reduziert ist.The length of the locking body receiving section 128 along the channel axis 188 is dimensioned such that the locking body 122 can be displaced in the locking body receiving section 128 by a distance of 0.6mm to 1.3mm starting from the sealing seat 124 (closed state of the overload valve 116) (open state of the overload valve 116). The sealing seat 124 is formed by a shoulder 131 in the valve channel 120, through which the cross section of the valve channel 120 is reduced in relation to the locking body receiving section 128.

Die Seitenkanten 132 des Sperrkörperaufnahmeabschnitts 128 am vom Dichtsitz 124 abgewandten Ende des Sperrkörperaufnahmeabschnitts 128 sind derart umgeformt bzw. verprägt, dass der Querschnitt des Ventilkanals 120 an den Seitenkanten 132 bezogen auf den Querschnitt des Sperrkörperaufnahmeabschnitts 128 reduziert ist. Dadurch wird im Sperrkörperaufnahmeabschnitt 128 eine Verlagerung des Sperrkörpers 122 vom Dichtsitz 124 weg begrenzt.The side edges 132 of the locking body receiving section 128 at the end facing away from the sealing seat 124 Locking body receiving section 128 are formed or embossed in such a way that the cross section of the valve channel 120 at the side edges 132 is reduced in relation to the cross section of the locking body receiving section 128. This limits a displacement of the locking body 122 away from the sealing seat 124 in the locking body receiving section 128.

Im montierten Zustand ist der Antriebskolben 40 mit seinem Kolbenboden 126 dem antriebsseitigen Druckraum 46 zugewandt (vgl. Fig.1), wobei die Öffnungsrichtung des Überlastventils 116 des Antriebskolbens 40 dem antriebsseitigen Druckraum 46 zugewandt ist. Mit anderen Worten öffnet sich das Überlastventil 116 bei entsprechender Beaufschlagung zum antriebsseitigen Druckraum 46 hin.In the assembled state, the drive piston 40 faces the drive-side pressure chamber 46 with its piston crown 126 (cf. Fig.1 ), wherein the opening direction of the overload valve 116 of the drive piston 40 faces the drive-side pressure chamber 46. In other words, the overload valve 116 opens towards the drive-side pressure chamber 46 when appropriate pressure is applied.

Der Antriebskolben 40 weist weiter ein in Schließstellung vorgespanntes, im Beispiel federvorgespanntes, Regelventil 134 auf (vgl. Fig.3b). Das Regelventil 134 ist jeweils in einem weiteren Ventilkanal 136 angeordnet und mündet am Kolbenboden 126 aus, wobei das Regelventil 134 eine Öffnungsrichtung aufweist, die vom Kolbenboden 126 abgewandt ist. Mit anderen Worten öffnet sich das Regelventil 134 bei entsprechender Beaufschlagung zum Getrieberaum 22 hin.The drive piston 40 also has a control valve 134 which is preloaded in the closed position, in the example spring-loaded (cf. Fig.3b ). The control valve 134 is arranged in a further valve channel 136 and opens at the piston crown 126, the control valve 134 having an opening direction that faces away from the piston crown 126. In other words, the control valve 134 opens towards the gearbox chamber 22 when appropriate pressure is applied.

Zusammenfassend ist durch den quadratischen Querschnitt des Sperrkörperaufnahmeabschnitts 92, 128 und dem im Beispiel kugelförmigen Sperrkörper 90, 122 eine genaue Positionierung des Sperrkörpers 90, 122 relativ zum Dichtsitz 91, 124 bzw. zur Ventilöffnung ermöglicht, wobei hinreichend große Ausströmungsöffnungen 89, 138 (Zwischenraum zwischen Außenkontur des Sperrkörpers und der Innenkontur des Sperrkörperaufnahmeabschnitts) für das Fluid verbleiben.In summary, the square cross section of the locking body receiving section 92, 128 and the spherical locking body 90, 122 in the example enable precise positioning of the locking body 90, 122 relative to the sealing seat 91, 124 or to the valve opening, with sufficiently large outflow openings 89, 138 (space between Outer contour of the locking body and the inner contour of the locking body receiving section) remain for the fluid.

Claims (9)

  1. Door closer (10) for actuating a leaf of a door, casement of a window or the like, comprising a closer shaft (20) and a cam disc (26) connected to the closer shaft (20) for conjoint rotation therewith, wherein the cam disc (26) cooperates with a drive device (38) having a drive piston (40) and with a damping device (60) having a damping piston (62), wherein the drive piston (40) and/or the damping piston (62) comprises or comprise an overload valve (84, 116), wherein the overload valve (84, 116) in each case comprises a valve channel (88, 120) that extends along a channel axis (86, 118), a locking body (90, 122) and a sealing seat (91, 124), wherein the locking body (90, 122) is received in a locking body receiving portion (92, 128) in the valve channel (88, 120) and adjoins the sealing seat (91, 124) in the closed state of the overload valve (84, 116), characterised in that the valve channel (88, 120) has an n-cornered cross-section with n ≥ 3 at least in the locking body receiving portion (92, 128), preferably along the entire valve channel (88, 120), and in that the locking body (90, 122) is spherical or cylindrical.
  2. Door closer (10) according to claim 1, characterised in that the locking body (90, 122) is dimensioned such that the locking body (90, 122) is guided without play in the locking body receiving portion (92, 128) orthogonally to the channel axis (86, 118).
  3. Door closer (10) according to claim 1 or 2, characterised in that n ≥ 3 and n ≤ 8 (3 ≤ n ≤ 8) for the n-cornered cross-section of the valve channel (88, 120).
  4. Door closer (10) according to any of the preceding claims, characterised in that the valve channel (88, 120) has a square cross-section at least in the locking body receiving portion (92, 128), preferably along the entire valve channel (88, 120).
  5. Door closer (10) according to any of the preceding claims, characterised in that the length of the locking body receiving portion (92, 128) along the channel axis (86, 118) is dimensioned such that the locking body (90, 122) can be displaced by a distance of from 0.6 mm to 1.3 mm in the locking body receiving portion (92, 128) proceeding from the sealing seat (91, 124).
  6. Door closer (10) according to any of the preceding claims, characterised in that the sealing seat (91, 124) is formed by a step (94, 130) in the valve channel (88, 120), on account of which the cross-section of the valve channel (88, 120) is reduced with respect to the locking body receiving portion (92, 128).
  7. Door closer (10) according to any of the preceding claims, characterised in that lateral edges (95, 132) of the locking body receiving portion (92, 128) are deformed at the end of the locking body receiving portion (92, 128) that is remote from the sealing seat (91, 124) such that the cross-section of the valve channel (88, 120) at the lateral edges (95, 132) is reduced with respect to the cross-section of the locking body receiving portion (92, 128).
  8. Door closer (10) according to any of the preceding claims, characterised in that the piston head (93) of the drive piston (40) faces a drive-side pressure chamber (46) and/or the piston head (126) of the damping piston (62) faces a drive-side pressure chamber (64), wherein the opening direction of the overload valve (116) of the drive piston (40) is directed towards the drive-side pressure chamber (46) and/or wherein the opening direction of the overload valve (84) of the damping piston (62) is directed towards the damping-side pressure chamber (64).
  9. Door closer (10) according to any of the preceding claims, characterised in that the drive piston (40) and/or the damping piston (62) comprises or comprise a control valve (96, 134) that is preloaded, in particular spring-preloaded, in the closed position, wherein the control valve (96, 134) is arranged in each case in another valve channel (98, 136) and opens out at the piston head (93, 126), wherein the control valve (96, 134) has an opening direction that is directed away from the piston head (93, 134).
EP22205204.5A 2021-11-15 2022-11-03 Door closer Active EP4180608B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021129628.5A DE102021129628A1 (en) 2021-11-15 2021-11-15 door closer

Publications (2)

Publication Number Publication Date
EP4180608A1 EP4180608A1 (en) 2023-05-17
EP4180608B1 true EP4180608B1 (en) 2024-03-13

Family

ID=84329915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22205204.5A Active EP4180608B1 (en) 2021-11-15 2022-11-03 Door closer

Country Status (3)

Country Link
EP (1) EP4180608B1 (en)
DE (1) DE102021129628A1 (en)
FI (1) FI4180608T3 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1497220A (en) * 1976-05-19 1978-01-05 Wherton I Door closer
DE2816806C2 (en) * 1978-04-18 1984-12-13 Alfred Teves Gmbh, 6000 Frankfurt Valve
DE3742213C2 (en) * 1987-12-12 1995-03-30 Dorma Gmbh & Co Kg Door closer with a closer shaft loaded by a spring arrangement in the closing direction
DE202012003928U1 (en) 2012-04-18 2013-07-22 Gretsch-Unitas Gmbh door closers
DE102017124034A1 (en) * 2017-10-16 2019-04-18 Gretsch-Unitas GmbH Baubeschläge Closing device for closing a door or window sash
DE102020108623A1 (en) 2020-03-27 2021-09-30 Gretsch-Unitas GmbH Baubeschläge Closing device for closing a door or window sash

Also Published As

Publication number Publication date
DE102021129628A1 (en) 2023-05-17
FI4180608T3 (en) 2024-04-04
EP4180608A1 (en) 2023-05-17

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