EP0166285B1 - Automatic door closer - Google Patents

Automatic door closer Download PDF

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Publication number
EP0166285B1
EP0166285B1 EP85107093A EP85107093A EP0166285B1 EP 0166285 B1 EP0166285 B1 EP 0166285B1 EP 85107093 A EP85107093 A EP 85107093A EP 85107093 A EP85107093 A EP 85107093A EP 0166285 B1 EP0166285 B1 EP 0166285B1
Authority
EP
European Patent Office
Prior art keywords
piston
spring
door
spring arrangement
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.)
Expired
Application number
EP85107093A
Other languages
German (de)
French (fr)
Other versions
EP0166285A3 (en
EP0166285A2 (en
Inventor
Horst Tillmann
Giselher Sieg
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.)
Dorma Baubeschlag GmbH and Co KG
Original Assignee
Dorma Baubeschlag GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dorma Baubeschlag GmbH and Co KG filed Critical Dorma Baubeschlag GmbH and Co KG
Publication of EP0166285A2 publication Critical patent/EP0166285A2/en
Publication of EP0166285A3 publication Critical patent/EP0166285A3/en
Application granted granted Critical
Publication of EP0166285B1 publication Critical patent/EP0166285B1/en
Expired 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
    • E05F1/00Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/002Closers or openers for wings, not otherwise provided for in this subclass controlled by automatically acting means
    • E05F1/006Closers or openers for wings, not otherwise provided for in this subclass controlled by automatically acting means by emergency conditions, e.g. fire
    • 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
    • E05F15/00Power-operated mechanisms for wings
    • E05F15/50Power-operated mechanisms for wings using fluid-pressure actuators
    • E05F15/53Power-operated mechanisms for wings using fluid-pressure actuators for swinging wings
    • 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
    • E05F15/00Power-operated mechanisms for wings
    • E05F15/60Power-operated mechanisms for wings using electrical actuators
    • E05F15/603Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/611Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
    • E05F15/63Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by swinging arms
    • 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
    • E05F3/22Additional arrangements for closers, e.g. for holding the wing in opened or other position
    • E05F3/224Additional arrangements for closers, e.g. for holding the wing in opened or other position for assisting in opening the wing
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00Constructional elements; Accessories therefore
    • E05Y2201/20Brakes; Disengaging means, e.g. clutches; Holders, e.g. locks; Stops; Accessories therefore
    • E05Y2201/252Brakes; Disengaging means, e.g. clutches; Holders, e.g. locks; Stops; Accessories therefore characterised by type of friction
    • E05Y2201/254Fluid or viscous friction
    • E05Y2201/256Fluid or viscous friction with pistons or vanes
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00Constructional elements; Accessories therefore
    • E05Y2201/20Brakes; Disengaging means, e.g. clutches; Holders, e.g. locks; Stops; Accessories therefore
    • E05Y2201/262Brakes; Disengaging means, e.g. clutches; Holders, e.g. locks; Stops; Accessories therefore characterised by type of motion
    • E05Y2201/264Brakes; Disengaging means, e.g. clutches; Holders, e.g. locks; Stops; Accessories therefore characterised by type of motion linear
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00Constructional elements; Accessories therefore
    • E05Y2201/40Motors; Magnets; Springs; Weights; Accessories therefore
    • E05Y2201/404Motors; Magnets; Springs; Weights; Accessories therefore characterised by the function
    • E05Y2201/41Motors; Magnets; Springs; Weights; Accessories therefore characterised by the function for closing
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00Constructional elements; Accessories therefore
    • E05Y2201/40Motors; Magnets; Springs; Weights; Accessories therefore
    • E05Y2201/43Motors
    • E05Y2201/448Fluid motors; Details thereof
    • E05Y2400/3015
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2400/00Electronic control; Power supply; Power or signal transmission; User interfaces
    • E05Y2400/10Electronic control
    • E05Y2400/45Control modes
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2800/00Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/20Combinations of elements
    • E05Y2800/205Combinations of elements forming a unit
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2800/00Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/20Combinations of elements
    • E05Y2800/21Combinations of elements of identical elements, e.g. of identical compression springs
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2800/00Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/20Combinations of elements
    • E05Y2800/22Combinations of elements of not identical elements of the same category, e.g. combinations of not identical springs
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00Application of doors, windows, wings or fittings thereof
    • E05Y2900/10Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13Application of doors, windows, wings or fittings thereof for buildings or parts thereof characterised by the type of wing
    • E05Y2900/132Doors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S16/00Miscellaneous hardware, e.g. bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance
    • Y10S16/09Hydraulic actuated checks, closers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S16/00Miscellaneous hardware, e.g. bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance
    • Y10S16/10Spring actuated checks and closers

Definitions

  • the invention relates to an automatic door closer with a loadable through a spring arrangement in the closing direction, which leads the pushable piston of a damping-serving hydraulic piston-cylinder unit, the pressure chamber with the unpressurized space on the one hand via a throttle device and on the other hand via a Pressure chamber opening check valve is connected, between the piston and the spring arrangement a self-supporting member is connected, which can be driven by external energy in the sense of a spring preload depending on the door actuation.
  • the closing force of the spring arrangement acting on the damping piston can be canceled at the start of the door opening process by the support member leading the movement of the damping piston in the door opening direction by a motor operated by external energy for example, is moved mechanically or hydraulically.
  • This advance movement of the support member exciting the spring arrangement is monitored by, for example, a pressure switch, so that during normal opening movement of the door leaf only the damping piston in the cylinder has to be displaced, so that the door user only has to exert as little force during the door opening movement as to overcome the inertia of the door leaf, the friction in the door hinges, the bearing points of the articulated arms and the closer shaft as well as between the damping piston and cylinder.
  • a pressure switch so that during normal opening movement of the door leaf only the damping piston in the cylinder has to be displaced, so that the door user only has to exert as little force during the door opening movement as to overcome the inertia of the door leaf, the friction in the door hinges, the bearing points of the articulated arms and the closer shaft as well as between the damping piston and cylinder.
  • the spring arrangement takes effect with a time delay in the closing direction when there is no more movement on the door leaf. This means that an operator who, as a result of the easy-to-open door leaf, may not have recognized at all that the door leaf is provided with a door closer, suddenly feels the full closing moment when the operator is distracted by a conversation, for example, and keeps the door open in the door passage remains. This creates a risk of injury, particularly for older people and children.
  • the object of the present invention is to provide an automatic door closer of the type mentioned, in which on the one hand the advantages of easy operation of the door leaf and the presence of a high closing torque required for the emergency are maintained, and on the other hand constantly expresses a low closing torque.
  • the damping piston is constantly loaded in the closing direction by a second force accumulator, which exerts less force than the spring arrangement.
  • a second force accumulator which exerts less force than the spring arrangement.
  • the person using a door equipped with such a door closer always has the feeling of actuating a self-closing door, so that the person is not surprised if a higher closing torque occurs when the door is delayed.
  • the door will normally close due to the low-energy energy store before the higher closing torque takes effect.
  • the spring arrangement itself can be dimensioned weaker by the amount of the force expressed by the second energy accumulator, so that the components with which the spring arrangement is preloaded via external energy can also be designed to be weaker.
  • the damping piston is connected to the bottom of the pressure chamber on the side opposite the support member via a tension spring forming the energy accumulator.
  • this tension spring By means of this tension spring, the damping piston is constantly acted upon in the closing direction, so that its tensile force also acts continuously on the closing shaft, forming a closing moment.
  • this tension spring is designed to be significantly weaker than the spring arrangement acting on the damping piston via the support member.
  • the energy accumulator is also designed as the compression spring acting on the damping piston on the same side as the spring arrangement and is in constant contact with the piston.
  • the compression spring continuously acting on the damping piston comprises the spring arrangement, one end of which is supported on a fixed abutment of the closer housing, while the other end of the spring arrangement rests on the collar of a sliding sleeve comprising the compression spring, which is part of the self-movable Support member is.
  • the sliding sleeve encompasses a support tube arranged in the spring arrangement, which has slots on its lateral surface for the passage of coupling fingers of the sliding sleeve, which have the Grip the ring bead on a pull rod that can be moved in the support tube.
  • the spring arrangement is arranged behind the force accumulator designed as a compression spring and acts directly on the damping piston and acts on a tensioning piston in an extension cylinder separate from the master cylinder, which in turn acts on the damping piston in the closing direction via a connection.
  • the connection between the damping piston and the tensioning piston may advantageously be formed by a pressure rod penetrating the partition of the adjacent cylinders.
  • This hydraulic connection can be formed by a pressure medium line connecting the pressure chamber of the extension cylinder receiving the tensioning piston to the unpressurized space of the master cylinder, which can be blocked by a three-way valve.
  • the door closers shown in the figures have an elongated, rectangular housing 10, through which a cylindrical bore 11 extends, which is closed on both sides. Crossing through the housing 10, in a known manner, are two step bores which are aligned with one another and can be seen in particular in FIG. In its middle length range, the closer shaft has a pinion 13. Both end parts of the closer shaft 12 are prepared for the rotationally fixed reception of a linkage arm, not shown, for establishing a connection between the door frame and the door leaf by, for example, attaching square edges (FIG. 5).
  • a damping piston 14 is arranged to be longitudinally displaceable and consists of a first piston head 15, a second piston head 16 and a web 17 arranged between them.
  • This web is designed as a toothed rack, which meshes with the pinion 13 of the closer 12. Rotational movements of the closing mechanism 12 therefore cause longitudinal movements of the damping piston 14 and vice versa.
  • a check valve 18 is arranged in the piston head 15 sealed against the cylindrical bore 11 and opens to the pressure chamber 20 to the left of the piston head 15.
  • a spring-loaded pressure relief valve 19 is arranged in the piston head 15, which opens when an overpressure arises in the pressure chamber 20 to the left of the piston head 15, as could occur, for example, when the door leaf is closed violently.
  • the check valve 18 and the pressure relief valve 19 are also arranged in the piston head 15, but in this embodiment it is not the piston head 15 but the piston head 16 that is sealed off from the bore 11.
  • the free passage 69 in one of the piston heads 15 and 16 is omitted.
  • a stepped bore 21 extends in the housing 10 parallel to the cylinder bore 11, into which a throttle cone cooperating with a seat formed by a step is screwed on the left-hand end to form a throttle valve 22.
  • This throttle valve has a throttle cone 23 which can protrude into the stepped part of the stepped bore 21 to restrict the flow.
  • two transverse bores 24 and 25 open into the stepped bore 21 receiving the throttle valve while leaving an annular space, which are connected to the cylinder bore 11 such that the transverse bore 24 in the end position of the damping piston 14 corresponding to a closed position of the door leaf in the through the sealed piston head
  • Deten pressure chamber 20 opens, while the transverse bore 25 is arranged so that it opens into the unpressurized space in the aforementioned position of the damping piston immediately behind the sealed head.
  • each door closer 10 is closed by a plug 27 screwed into the cylinder bore 11 with the aid of a sealing ring.
  • this stopper 27 has a chamber 28 which is covered towards the pressure chamber 20 by a membrane.
  • the cylinder bore 11 is closed by a plug 33, the cavity formed by the cylinder bore 11 and the end plugs 27 and 33 forming a master cylinder 34.
  • This master cylinder 34 is followed by an extension cylinder 35, the left-hand end component of which can be formed by the plug 33 screwed into the cylinder bore 11 of the master cylinder 34.
  • a tensioning piston 36 In the extension cylinder there is a tensioning piston 36, through which the interior of the extension cylinder 35 is divided into two chambers 37 and 38.
  • a channel 39 and 40 opens into each chamber 37 and 38 in front of and behind the tensioning piston, taking into account the entire piston stroke, a pump 42 driven by a motor 41 and a control valve 43 being connected between the channels 39 and 40.
  • the tensioning piston 36 is connected to a piston rod 44 sealingly passing through the stopper 33, which in turn is connected to a pressure plate 45, which is arranged to be longitudinally displaceable even in the unpressurized space of the master cylinder 34 and in the closed position of the Door wing rests on the piston head 16.
  • the tensioning piston 36 together with the piston rod 44 and the pressure plate 45 forms a support member 46, by means of which the spring arrangement 47 can be supported in an inactive position.
  • the spring assembly formed of a compression spring '47 is arranged in the in FIGS.
  • the tensioning piston 36 moves to the right, as a result of which the damping piston 14 is released via the pressure disk 45 connected to it. so that this could be transferred into a position corresponding to the door opening position without effort.
  • the damping piston is constantly loaded in the closing direction by a second force accumulator 48, which exerts less force than the spring arrangement 47.
  • the energy accumulator 48 is formed by a tension spring 49 engaging with one end on the piston head 15, the other end of which is attached to the plug 27 of the master cylinder 34. If a door leaf equipped with the door closer according to FIG. 1 is now to be opened on the basis of its closed state, then a control logic 51 connected between the power supply and the electric motor 41 is triggered via a door contact 50 to be confirmed, for example, by the lock latch. whereby the motor 41 is switched on and, via the pump 42, delivers pressure medium from the chamber 38 into the chamber 37 via the channels 40 and 39, so that the tensioning piston 36 is moved to the right against the force of the spring arrangement 47.
  • the displacement path of the support member 46 comprising the tensioning piston 36 and the pressure plate 45 is determined by the engine running time set in the control logic, which may be set such that the support member 46 is ahead of an amount corresponding to a certain door opening angle.
  • the effect of the spring arrangement 47 from the damping piston 14 is thus initially canceled. If the door leaf is actually opened, the damping piston 14 is only moved against the weak restoring force of the tension spring 49, a negative pressure being generated in the pressure chamber 20, which is converted by the moving coil system 32 into an electrical pulse for the control logic 44, so that the motor 41 is turned on again to further bias the spring assembly 47, always according to the amount leading the door leaf movement, which was set when the door was closed.
  • the control logic 51 will reverse the control valve 43 in such a way that the pressure medium from the chamber 37 before the Tensioning piston 36 can flow back into the chamber 38 behind the tensioning piston.
  • the spring arrangement 47 can act fully on the damping piston 14 in the closing direction.
  • this movement is hydraulically damped, as in any conventional door closer, by the throttle valve 22 which engages in the channels 21, 24, 25 and 26.
  • the force accumulator 48 which acts continuously on the damping piston 14, is designed as a compression spring 52, which is arranged together with the spring arrangement 47 coaxially in the unpressurized space of the master cylinder 34.
  • the compression spring 52 which is designed to be significantly weaker than the spring arrangement 47, is supported on one end directly on the piston head 16 and on the other end on the closure cap 53 of a support tube 54, which in turn is held on the plug 33 and surrounds the piston rod 44 with play.
  • the compression spring 52 is encompassed by a sliding sleeve 55, which in turn engages in the spring arrangement 47 and has at its end facing the piston head 16 a collar which forms the thrust washer 45, on one end of which the spring arrangement is supported, the other end of which is attached to the stopper 33 of the extension cylinder 35, the support tube 54 abuts.
  • the support tube 54 has on its outer surface two diametrically opposed slots 56, into which coupling fingers 57 of the sliding sleeve 55 engage, which grip a disk 58 which overlaps the piston rod 44 and is connected to it.
  • FIGS. 4 and 5 largely corresponds to the embodiments shown in FIGS. 1 and 2 and 3.
  • a spiral spring 59 was used there as the energy accumulator 48, which constantly acts on the damping piston 14 and is connected at one end to the housing 10 of the door closer via a pin 60, while the other end engages with a spring tab 61 in a groove of the closer shaft 12.
  • the mode of operation of the exemplary embodiments shown in FIGS. 2 and 3 and 4 and 5 is the same as in the exemplary embodiment shown in FIG. 1.
  • FIG. 6 shows a further exemplary embodiment of the door closer according to the invention, in which the spring arrangement 47 is moved into the chamber 38 of the extension cylinder 35.
  • This spring arrangement 47 is supported at one end on the tensioning piston 36 and at the other end on the end plug 62 of the extension cylinder 35.
  • the force accumulator 48 which acts continuously on the damping piston 14, is arranged as a compression spring 63 in this embodiment shown in FIG. 6.
  • the tensioning piston 36 is firmly connected to a push rod 64 which, on the one hand, engages through the plug 33 of the extension cylinder 35 with the interposition of a sealing ring 65 and projects in the unpressurized space of the master cylinder 34 inside the compression spring 63 to the piston head 16 of the damping piston 14 and with a support dome 66 comes to rest on the outer end face of the piston head 16.
  • the push rod 64 thus forms a connection between the tensioning piston 36 and the damping piston 14.
  • the advance path is kept essentially constant by the pressure monitoring of the moving coil system 32, so that only the force expressed by the compression spring 63 counteracts this opening movement during the opening process of the door. If the door leaf is now stopped or even released, the pressure of the moving coil system 32 and the control logic 51 is used to switch off the motor 41, and the control logic 51 also gives the control valve 43 a time-delayed impulse, channels 39 and 40 via the to short-circuit the parallel channel 68 arranged to the pump 42 so that the pressure medium can flow back from the chamber 37 into the chamber 38 and thus the spring arrangement 47 moves the tensioning piston 36 in the closing direction, which can support the damping piston 14 by means of the weaker compression spring 63 in the closing direction via the push rod 64.
  • the two unpressurized spaces of the master cylinder 34 and the extension cylinder 35 are connected to one another by an equalizing channel 69.
  • the lower closing force of the compression spring 63 is usually sufficient to close the door leaf before the control valve 51 opens the control valve 43 with a time delay, after which the spring arrangement only occurs 47 can take effect in the closing sense.
  • the spring arrangement 47 is also arranged in the extension cylinder 35 and is supported on the one hand on its sealing plug 62 and on the other hand on the tensioning piston 36.
  • the chambers 37 and 38 subdivided by the tensioning piston 36 are likewise connected to one another via channels 39 and 40, between which a pump 42 operated by an electric motor 41 with subsequent check valve 67 is connected.
  • the force accumulator 48 in the form of a compression spring 63 which acts on the damping piston 14 in the closing direction, is also arranged, as in the embodiment shown in FIG.
  • FIG. 7 shows the system in the absolute rest position on the drawing, i. H. that all function generators and control devices are in the unactuated position.
  • the door contact 50 is in the closed position and has thus closed the circuit of a solenoid valve 43 'which has a time delay element 76.
  • the channel 70 is blocked by the pressure space 37 of the extension cylinder 35, while at the same time the channels 72 and 77 from the space having the compression spring 63 are connected to the channel 71 opening into the unpressurized space of the master cylinder.
  • An operating voltage is always applied to the motor 41 regardless of the door position and thus also independently of the position of the door contact 50 via the pressure switch 74 connected to the pressure chamber 37 by means of the line 75 when the switching pressure set in the pressure switch 74 falls below.
  • the circuit to the motor 41 is closed, so that the motor starts and conveys the pressure medium into the pressure chamber 37 via the pump 42 from the unpressurized chamber 38 of the extension cylinder 35 via the suction channel 40 and the pressure channel 39 .
  • the piston 36 in the extension cylinder 35 is pushed so far to the right against the pressure of the spring 47 until the pressure set at the pressure switch 74 corresponding to the desired closing force is reached or exceeded, so that the pressure switch 74 by the switches the pressure present via the line 75 connected to the pressure chamber and interrupts the motor circuit.
  • the maximum energy required for secure door closure is now contained in the pressure chamber 37 of the extension cylinder 35 and is stored there by the spring arrangement 47, since on the one hand the return flow through the channel 39 is blocked by the check valve 67 and on the other hand the channel 70 in the solenoid valve 43 ' is blocked. If the door is now opened, the door contact 50 switches off and interrupts the circuit to the solenoid valve 43 ', which is then transferred to its other control position. First, however, the solenoid valve 43 remains in its closed position for a period of time set on the timer 76 (selectable up to 20 seconds).
  • the door can be opened against the low force of the compression spring 63, the hydraulic medium displaced from the space having the compression spring 63 initially being able to flow freely through the channel 77 through the solenoid valve 43 'and the channel 71 into the unpressurized space of the master cylinder.
  • the piston head 16 has overflowed the mouth of the channel 77 opening into the master cylinder at a distance from the channel 72, the pressure medium is inevitably conducted via the throttled channel 72, with the result that opening damping is achieved.
  • the closing movement starts immediately under the relatively low pressure of the compression spring 63, the pressure medium coming into the pressure chamber 20 in front of the piston head 15 during the opening movement via the aforementioned throttle device 24, 21, 22, 23 , 26 into the unpressurized space and from there via the channel 71, the solenoid valve 43 'and the channels 72 and 77 can flow into the space of the master cylinder having the compression spring 63.
  • the pressure medium is not braked by the throttle located in the throttle check valve 73, but flows freely via the check valve into the space having the compression spring 63.
  • the door contact 50 switches over again and closes the circuit to the solenoid valve 43 ', ie the closed position of the solenoid valve for the pressure channel 70 is retained and the energy stored in the pressure chamber 37 of the extension cylinder 35 is not queried, since in this case it was not required for the safe closing of the door.
  • the solenoid valve is de-energized and switches over after the time preselected in the timer 76, so that the channel 70 is now connected directly to the channels 72 and 77 and the energy stored in the pressure chamber 37 of the extension cylinder 35 is passed directly in front of the piston head 16 of the door closer piston 14 and the door can be securely closed under the maximum pressure now available until the lock contact 50 is actuated by the lock latch. closes the circuit of the solenoid valve 43 'again.
  • the switching pressure in the pressure switch 74 is not reached, ie the pressure switch 74 switches over and closes the motor circuit.
  • the motor 41 then starts up again immediately and drives the pump 42 in order to immediately make the required energy available again.
  • the device works as a normal door closer with its maximum closing force by the pressure medium to be displaced in the room of the master cylinder 34 having the compression spring 63 when opening the door via the channels 77 and 72, respectively Solenoid valve 43 'and the extension channel 70 is pressed directly in front of the piston 36 of the extension cylinder 35, the pressure required for the compression of the spring arrangement 47 having to be applied by the attendant when the door is opened.

Description

Die Erfindung betrifft einen selbsttätigen Türschließer mit einer durch eine Federanordnung im Schließsinn belastbaren Schließerwelle, die den vorschiebbaren Kolben einer Dämpfungszwecken dienenden, hydraulischen Kolben-Zylinder-Einheit führt, deren Druckraum mit dem drucklosen Raum einerseits über einen eine Drosseleinrichtung aufweisenden Rückführkanal und andererseits über ein zum Druckraum hin öffnenden Rückschlagventil verbunden ist, wobei zwischen den Kolben und die Federanordnung ein eigenbewegliches Stützglied geschaltet ist, das durch Fremdenergie im Sinne einer Federvorspannung in Abhängigkeit von der Türbetätigung gesteuert antreibbar ist.The invention relates to an automatic door closer with a loadable through a spring arrangement in the closing direction, which leads the pushable piston of a damping-serving hydraulic piston-cylinder unit, the pressure chamber with the unpressurized space on the one hand via a throttle device and on the other hand via a Pressure chamber opening check valve is connected, between the piston and the spring arrangement a self-supporting member is connected, which can be driven by external energy in the sense of a spring preload depending on the door actuation.

Bei einem aus der DE-A-32 34 319 ersichtlichen Türschließer der eingangs genannten Art läßt sich bei Reginn des Türöffnungsvorganges die auf den Dämpfungskolben wirkende Schließkraft der Federanordnung aufheben, indem das Stützglied der Bewegung des Dämpfungskolbens im Türöffnungssinne vorauseilend durch einen mittels Fremdenergie betriebenen Motor auf beispielsweise mechanische oder hydraulische Weise bewegt wird. Diese Vorauseilbewegung des die Federanordnung spannenden Stützgliedes wird durch beispielsweise einen Druckwächter überwacht, so daß bei normaler Öffnungsbewegung des Türflügels lediglich der Dämpfungskolben im Zylinder verschoben werden muß, so daß der Türberiutzer bei der Türöffnungsbewegung nur eine so geringe Kraft aufbringen muß, als zur Überwindung der Massenträgheit des Türflügels, der Reibung in den Türscharnieren, den Lagerstellen der Gelenkarme und der Schließerwelle sowie zwischen Dämpfungskolben und Zylinder erforderlich ist. Im Gefahrenfall, wie beispielsweise bei einem Brand, ist es jedoch erforderlich, daß der Türflügel gegen etwa auftretende Sogkräfte sicher geschlossen werden muß. Dies ist das Kriterium für die Dimensionierung der Federanordnung, die den Türflügel in seine Schließlage zurückführen soll. Bei diesem bekannten Türschließer wird die Federanordnung im Schließsinne zeitverzögert wirksam, wenn keine Bewegung mehr am Türflügel stattfindet. Dies bedeutet, daß eine Bedienungsperson, die infolge des leicht zu öffnenden Türflügels möglicherweise überhaupt nicht erkannt hat, daß der Türflügel mit einem Türschließer versehen ist, plötzlich das volle Schließmoment verspürt, wenn die Bedienungsperson beispielsweise durch ein Gespräch abgelenkt ist und im Türdurchgang die Tür offenhaltend verbleibt. Dadurch ist insbesondere für ältere Menschen und Kinder eine Verletzungsgefahr gegeben.In a door closer of the type mentioned at the beginning of DE-A-32 34 319, the closing force of the spring arrangement acting on the damping piston can be canceled at the start of the door opening process by the support member leading the movement of the damping piston in the door opening direction by a motor operated by external energy for example, is moved mechanically or hydraulically. This advance movement of the support member exciting the spring arrangement is monitored by, for example, a pressure switch, so that during normal opening movement of the door leaf only the damping piston in the cylinder has to be displaced, so that the door user only has to exert as little force during the door opening movement as to overcome the inertia of the door leaf, the friction in the door hinges, the bearing points of the articulated arms and the closer shaft as well as between the damping piston and cylinder. In the event of danger, such as in the event of a fire, however, it is necessary for the door leaf to be securely closed against any suction forces that may occur. This is the criterion for the dimensioning of the spring arrangement which is intended to return the door leaf to its closed position. In this known door closer, the spring arrangement takes effect with a time delay in the closing direction when there is no more movement on the door leaf. This means that an operator who, as a result of the easy-to-open door leaf, may not have recognized at all that the door leaf is provided with a door closer, suddenly feels the full closing moment when the operator is distracted by a conversation, for example, and keeps the door open in the door passage remains. This creates a risk of injury, particularly for older people and children.

Die Aufgabe der vorliegenden Erfindung besteht darin, einen selbsttätigen Türschließer der eingangs genannten Art zu schaffen, bei dem einerseits die Vorteile leichter Bedienbarkeit des Türflügels und des Vorhandenseins eines für den Gefahrenfall erforderlichen hohen Schließmomentes beibehalten sind, und der andererseits ständig ein geringes Schließmoment äußert.The object of the present invention is to provide an automatic door closer of the type mentioned, in which on the one hand the advantages of easy operation of the door leaf and the presence of a high closing torque required for the emergency are maintained, and on the other hand constantly expresses a low closing torque.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß der Dämpfungskolben von einem zweiten, eine geringere Kraft als die Federanordnung äußernden Kraftspeicher ständig im Schließsinn belastet ist. Dadurch hat die eine mit einem solchen Türschließer ausgestattete Tür benutzende Person immer das Gefühl, eine selbstschließende Tür zu betätigen, so daß die Person nicht überrascht ist, wenn bei verzögerter Türbenutzung ein höheres Schließmoment auftritt. Außerdem wird im Normalfall durch den eine geringe Kraft äußernden Kraftspeicher die Tür bereits schließen, bevor das höhere Schließmoment wirksam wird. Außerdem kann die Federanordnung selbst um den Betrag der von dem zweiten Kraftspeicher geäußerten Kraft schwächer dimensioniert sein, so daß auch die Bauteile, mit welchen die Federanordnung über Fremdenergie vorgespannt wird, schwächer ausgelegt werden können.This object is achieved in that the damping piston is constantly loaded in the closing direction by a second force accumulator, which exerts less force than the spring arrangement. As a result, the person using a door equipped with such a door closer always has the feeling of actuating a self-closing door, so that the person is not surprised if a higher closing torque occurs when the door is delayed. In addition, the door will normally close due to the low-energy energy store before the higher closing torque takes effect. In addition, the spring arrangement itself can be dimensioned weaker by the amount of the force expressed by the second energy accumulator, so that the components with which the spring arrangement is preloaded via external energy can also be designed to be weaker.

Nach einem Ausgestaltungsmerkmal der Erfindung ist der Dämpfungskolben auf der dem Stützglied gegenüberliegenden Seite über eine den Kraftspeicher bildende Zugfeder mit dem Boden des Druckraumes verbunden. Durch diese Zugfeder ist der Dämpfungskolben ständig im Schließsinn beaufschlagt, so daß deren Zugkraft auch ständig ein Schließmoment bildend an der Schlie- ßerweIle wirksam wird. Jedoch ist diese Zugfeder wesentlich schwächer ausgebildet als die den Dämpfungskolben über das Stützglied beaufschlagende Federanordnung.According to a design feature of the invention, the damping piston is connected to the bottom of the pressure chamber on the side opposite the support member via a tension spring forming the energy accumulator. By means of this tension spring, the damping piston is constantly acted upon in the closing direction, so that its tensile force also acts continuously on the closing shaft, forming a closing moment. However, this tension spring is designed to be significantly weaker than the spring arrangement acting on the damping piston via the support member.

Es ist jedoch auch nach einem anderen Ausgestaltungsmerkmal der Erfindung denkbar, daß außer der Federanordnung auch der Kraftspeicher als den Dämpfungskolben auf gleicher Seite wie die Federanordnung beaufschlagende Druckfeder ausgebildet und in ständiger Anlage am Kolben ist. Dabei ist dann insbesondere zur Einsparung von Bauraum die den Dämpfungskolben stetig beaufschlagende Druckfeder von der Federanordnung umfaßt, deren eines Ende an einem ortsfesten Widerlager des Schließergehäuses abgestützt ist, während das andere Ende der Federanordnung am Kragen einer die Druckfeder umfassenden Schiebehülse anliegt, die Bestandteil des eigenbeweglichen Stützgliedes ist. Um bei ortsfester Abstützung der Druckfeder die Federanordnung über die Schiebehülse im Vorspannsinne mit dem Stützglied zu verbinden, umgreift nach einem vorteilhaften Ausgestaltungsmerkmal der Erfindung die Schiebehülse ein in der Federanordnung angeordnetes Stützrohr, welches an seiner Mantelfläche Schlitze zum Durchtritt von Kupplungsfingern der Schiebehülse aufweist, die den Ringwulst einer im Stützrohr verschiebbaren Zugstange hinterfassen.However, it is also conceivable according to another embodiment feature of the invention that, in addition to the spring arrangement, the energy accumulator is also designed as the compression spring acting on the damping piston on the same side as the spring arrangement and is in constant contact with the piston. In this case, in particular to save installation space, the compression spring continuously acting on the damping piston comprises the spring arrangement, one end of which is supported on a fixed abutment of the closer housing, while the other end of the spring arrangement rests on the collar of a sliding sleeve comprising the compression spring, which is part of the self-movable Support member is. In order to connect the spring arrangement to the support member via the sliding sleeve in the pretensioning sense when the compression spring is stationary, according to an advantageous feature of the invention, the sliding sleeve encompasses a support tube arranged in the spring arrangement, which has slots on its lateral surface for the passage of coupling fingers of the sliding sleeve, which have the Grip the ring bead on a pull rod that can be moved in the support tube.

Statt der vorgenannten Ausführungsformen des den Dämpfungskolben stetig beaufschlagenden Kraftspeichers ist es auch denkbar, diesen als Spiralfeder auszubilden, die einerends unmittelbar an der Schließerwelle angreift und andernends am Gehäuse des Türschließers festgelegt ist.Instead of the aforementioned embodiments of the energy accumulator continuously acting on the damping piston, it is also conceivable for this to be designed as a spiral spring, which acts directly on the closer shaft at one end and is fixed on the other at the housing of the door closer.

Bei einer anderen Ausführungsform der Erfindung ist die Federanordnung hinter dem den Dämpfungskolben unmittelbar beaufschlagenden als Druckfeder ausgebildeten Kraftspeicher angeordnet und wirkt in einem vom Hauptzylinder getrennten Fortsatzzylinder auf einen Spannkolben ein, der seinerseits über eine Verbindung auf den Dämpfungskolben im Schließsinne einwirkt. Dabei mag die Verbindung zwischen dem Dämpfungskolben und dem Spannkolben vorteilhaft durch eine die Trennwand der benachbarten Zylinder durchdringende Druckstange gebildet sein.In another embodiment of the invention, the spring arrangement is arranged behind the force accumulator designed as a compression spring and acts directly on the damping piston and acts on a tensioning piston in an extension cylinder separate from the master cylinder, which in turn acts on the damping piston in the closing direction via a connection. The connection between the damping piston and the tensioning piston may advantageously be formed by a pressure rod penetrating the partition of the adjacent cylinders.

Statt einer mechanischen Verbindung zwischen dem Dämpfungskolben und dem Spannkolben ist es auch möglich, zwischen den beiden Kolben eine hydraulische Verbindung zu schaffen. Diese hydraulische Verbindung kann durch eine die Druckkammer des den Spannkolben aufnehmenden Fortsatzzylinders mit dem drucklosen Raum des Hauptzylinders verbindende Druckmittelleitung gebildet sein, die durch ein Dreiwegeventil sperrbar ist.Instead of a mechanical connection between the damping piston and the tensioning piston, it is also possible to create a hydraulic connection between the two pistons. This hydraulic connection can be formed by a pressure medium line connecting the pressure chamber of the extension cylinder receiving the tensioning piston to the unpressurized space of the master cylinder, which can be blocked by a three-way valve.

Die Erfindung ist in mehreren Ausführungen auf der Zeichnung beispielsweise dargestellt und wird nachfolgend näher erläutert. Es zeigen :

  • Fig. 1 den erfindungsgemäßen Türschließer im Längsschnitt mit dem in anderer Ebene liegenden, angedeuteten Drosselkanal und einem angeflanschten Fortsatzzylinder mit integrierter Motorpumpe, wobei der Dämpfungskolben im Schließsinn von einer Zugfeder belastet ist,
  • Fig. 2 ein weiteres Ausführungsbeispiel eines im Längsschnitt dargestellten Türschließers, der mit dem aus Fig. 1 ersichtlichen Türschließer vergleichbar ist, jedoch im Unterschied dazu an seinem Dämpfungskolben von einer in bezug auf die Federanordnung gleichgerichteten Druckfeder im Schließsinn belastet ist,
  • Fig. 3 den in Fig. 2 dargestellten Türschließer in einem Querschnitt nach der Linie 111-111 von Fig. 2,
  • Fig. 4 eine weiteres Ausführungsbeispiel eines Türschließers, der mit den vorhergehenden Türschließern vergleichbar ist, bei dem jedoch im Unterschied dazu der Dämpfungskolben im Schließsinn über eine an der Schließerwelle angreifende Spiralfeder ständig belastet ist,
  • Fig. 5 der aus Fig. 4 ersichtliche Türschließer in einem Querschnitt nach der Schnittlinie V-V von Fig. 4,
  • Fig. 6 ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Türschließers, bei welchem die über ein Stützglied den Dämpfungskolben belastende Federanordnung gleichachsig hinter einer den Dämpfungskolben stetig belastenden Druckfederangeordnet ist,
  • Fig. 7 ein weiteres Ausführungsbeispiel eines im Längsschnitt dargestellten Türschließers, bei dem im Unterschied zu Fig. 6 die von der Federanordnung auf das Stützglied geäußerte Kraft hydraulisch auf den ständig von einer Druckfeder beaufschlagten Dämpfungskolben übertragen ist.
The invention is shown in several versions on the drawing, for example, and is explained in more detail below. Show it :
  • 1 shows the door closer according to the invention in longitudinal section with the indicated throttle channel lying in a different plane and a flanged extension cylinder with an integrated motor pump, the damping piston being loaded by a tension spring in the closing direction,
  • 2 shows a further embodiment of a door closer shown in longitudinal section, which is comparable to the door closer shown in FIG. 1, but in contrast to this is loaded on its damping piston in the closing direction by a compression spring which is aligned with respect to the spring arrangement,
  • 3 shows the door closer shown in FIG. 2 in a cross section along the line 111-111 of FIG. 2,
  • 4 shows a further exemplary embodiment of a door closer, which is comparable to the previous door closers, but in which, in contrast to this, the damping piston is constantly loaded in the closing direction by means of a spiral spring acting on the closer shaft,
  • 5 shows the door closer shown in FIG. 4 in a cross section along the section line VV of FIG. 4,
  • 6 shows a further exemplary embodiment of a door closer according to the invention, in which the spring arrangement which loads the damping piston via a support member is arranged coaxially behind a compression spring which constantly loads the damping piston,
  • Fig. 7 shows another embodiment of a door closer shown in longitudinal section, in which, in contrast to Fig. 6, the force expressed by the spring arrangement on the support member is hydraulically transmitted to the damping piston constantly acted upon by a compression spring.

Die aus den Fig. ersichtlichen Türschließer weisen ein langgestrecktes, quaderförmiges Gehäuse 10 auf, durch welches sich eine zylindrische Bohrung 11 erstreckt, die beiderseits verschlossen ist. Quer durch das Gehäuse 10 erstrecken sich in bekannter Weise zwei zueinander fluchtende - insbesondere aus Fig. 5 ersichtliche - Stufenbohrungen, die Lagereinsätze mit Dichtringen aufnehmen, in welchen die Schließerwelle 12 drehbar geführt ist. In ihrem mittleren Längenbereich weist die Schließerwelle ein Zahnritzel 13 auf. Beide Endteile der Schließerwelle 12 sind zur drehfesten Aufnahme eines nicht dargestellten Gestängearmes zur Herstellung einer Verbindung zwischen dem Türrahmen und dem Türflügel durch beispielsweise die Anbringung von Vierkanten hergerichtet (Fig. 5)The door closers shown in the figures have an elongated, rectangular housing 10, through which a cylindrical bore 11 extends, which is closed on both sides. Crossing through the housing 10, in a known manner, are two step bores which are aligned with one another and can be seen in particular in FIG. In its middle length range, the closer shaft has a pinion 13. Both end parts of the closer shaft 12 are prepared for the rotationally fixed reception of a linkage arm, not shown, for establishing a connection between the door frame and the door leaf by, for example, attaching square edges (FIG. 5).

In der Zylinderbohrung 11 ist ein Dämpfungskolben 14 längsverschiebbar angeordnet, der aus einem ersten Kolbenkopf 15, einem zweiten Kolbenkopf 16 und einem dazwischen angeordneten Steg 17 besteht. Dieser Steg ist als Zahnstange ausgebildet, die mit dem Zahnritzel 13 der Schlie- ßerweIle 12 kämmt. Drehbewegungen der Schlie- ßerweiie 12 bewirken daher Längsbewegungen des Dämpfungskolbens 14 und umgekehrt.In the cylinder bore 11, a damping piston 14 is arranged to be longitudinally displaceable and consists of a first piston head 15, a second piston head 16 and a web 17 arranged between them. This web is designed as a toothed rack, which meshes with the pinion 13 of the closer 12. Rotational movements of the closing mechanism 12 therefore cause longitudinal movements of the damping piston 14 and vice versa.

Bei den aus den Fig. 1 bis 6 ersichtlichen Ausführungsbeispielen ist im gegen die zylindrische Bohrung 11 abgedichteten Kolbenkopf 15 ein Rückschlagventil 18 angeordnet, das zum links vom Kolbenkopf 15 liegenden Druckraum 20 hin öffnet. Außer dem Rückschlagventil 18 ist im Kolbenkopf 15 ein federbelastetes Überdruckventil 19 angeordnet, welches dann öffnet, wenn im Druckraum 20 links vom Kolbenkopf 15 ein Überdruck entsteht, wie er sich beispielsweise beim gewaltsamen Zuziehen des Türflügels einstellenkönnte. Bei dem aus Fig. 7 ersichtlichen Ausführungsbeispiel ist das Rückschlagventil 18 und das Überdruckventil 19 auch im Kolbenkopf 15 angeordnet, doch bei diesem Ausführungsbeispiel ist nicht der Kolbenkopf 15, sondern der Kolbenkopf 16 gegenüber der Bohrung 11 abgedichtet. Darüber hinaus entfällt bei diesem Ausführungsbeispiel der freie Durchgang 69 in einem der Kolbenköpfe 15 bzw. 16.In the exemplary embodiments shown in FIGS. 1 to 6, a check valve 18 is arranged in the piston head 15 sealed against the cylindrical bore 11 and opens to the pressure chamber 20 to the left of the piston head 15. In addition to the non-return valve 18, a spring-loaded pressure relief valve 19 is arranged in the piston head 15, which opens when an overpressure arises in the pressure chamber 20 to the left of the piston head 15, as could occur, for example, when the door leaf is closed violently. In the embodiment shown in FIG. 7, the check valve 18 and the pressure relief valve 19 are also arranged in the piston head 15, but in this embodiment it is not the piston head 15 but the piston head 16 that is sealed off from the bore 11. In addition, in this exemplary embodiment the free passage 69 in one of the piston heads 15 and 16 is omitted.

Bein allen dargestellten Ausführungen erstreckt sich im Gehäuse 10 parallel zur Zylinderbohrung 11 eine Stufenbohrung 21, in die linksendig ein mit einem durch eine Stufung gebildeten Sitz zusammenwirkender Drosselkegel zur Bildung eines Drosselventiles 22 eingeschraubt ist. Dieses Drosselventil weist einen Drosselkegel 23 auf, der zur Einschränkung des Durchflusses in den abgestuften Teil der Stufenbohrung 21 einragen kann. Links vom Drosselkegel 23 münden in die das Drosselventil unter Belassung eines Ringraumes aufnehmende Stufenbohrung 21 zwei Querbohrungen 24 und 25 ein, die mit der Zylinderbohrung 11 derart verbunden sind, daß die Querbohrung 24 in der einer Schließlage des Türflügels entsprechender Endlage des Dämpfungskolbens 14 in den durch den abgedichteten Kolbenkopf gebildeten Druckraum 20 mündet, während die Querbohrung 25 so angeordnet ist, daß sie bei vorgenannter Stellung des Dämpfungskolbens unmittelbar hinter dem abgedichteten Kopf in den drucklosen Raum mündet. Von der Stufenbohrung 21 geht außerdem eine vom abgedichteten Kolbenkopf in keiner Weise abdeckbare Querbohrung 26 aus, die in jedem Fall in den drucklosen Raum mündet.In all of the embodiments shown, a stepped bore 21 extends in the housing 10 parallel to the cylinder bore 11, into which a throttle cone cooperating with a seat formed by a step is screwed on the left-hand end to form a throttle valve 22. This throttle valve has a throttle cone 23 which can protrude into the stepped part of the stepped bore 21 to restrict the flow. To the left of the throttle cone 23, two transverse bores 24 and 25 open into the stepped bore 21 receiving the throttle valve while leaving an annular space, which are connected to the cylinder bore 11 such that the transverse bore 24 in the end position of the damping piston 14 corresponding to a closed position of the door leaf in the through the sealed piston head Deten pressure chamber 20 opens, while the transverse bore 25 is arranged so that it opens into the unpressurized space in the aforementioned position of the damping piston immediately behind the sealed head. From the stepped bore 21 there is also a transverse bore 26 which cannot be covered in any way by the sealed piston head and which in any case opens into the unpressurized space.

Der linksseitige endbereich jeden Türschließers 10 ist durch einen in die Zylinderbohrung 11 eingeschraubten Stopfen 27 mit Hilfe eines Dichtringes verschlossen. Bei den aus den Fig. 1 bis 6 ersichtlichen Ausführungsbeispielen weist dieser Stopfen 27 eine Kammer 28 auf, die zum Druckraum 20 hin durch eine Membran abgedeckt ist. In diese Kammer 28 ragt ein Pilzförmiger Stößel 29 eines in eine Ringspule 31 eintauchenden, federbelasteten Kernbolzens 30 eines Tauchspulensystems 32 ein.The left-hand end region of each door closer 10 is closed by a plug 27 screwed into the cylinder bore 11 with the aid of a sealing ring. In the exemplary embodiments shown in FIGS. 1 to 6, this stopper 27 has a chamber 28 which is covered towards the pressure chamber 20 by a membrane. A mushroom-shaped plunger 29 of a spring-loaded core bolt 30 of a moving coil system 32, which plunges into a ring coil 31, projects into this chamber 28.

Am rechtsseitigen Ende ist die Zylinderbohrung 11 durch einen Stopfen 33 verschlossen, wobei der durch die Zylinderbohrung 11 und die endseitigen Stopfen 27 und 33 gebildete Hohlraum einen Hauptzylinder 34 bildet. An diesen Hauptzylinder 34 schließt sich ein Fortsatzzylinder 35 an, dessen linksseitiger Endbestandteil durch den in die Zylinderbohrung 11 des Hauptzylinders 34 eingeschraubten Stopfen 33 gebildet sein kann. Im Fortsatzzylinder befindet sich ein Spannkolben 36, durch den der Innenraum des Fortsatzzylinders 35 in zwei Kammern 37 und 38 unterteilt ist. In jede Kammer 37 bzw. 38 mündet vor und hinter dem Spannkolben unter Berücksichtigung des gesamten Kolbenhubes jeweils ein Kanal 39 und 40 ein, wobei zwischen die Kanäle 39 und 40 eine von einem Motor 41 angetriebene Pumpe 42 und ein Steuerventil 43 geschaltet ist.At the right-hand end, the cylinder bore 11 is closed by a plug 33, the cavity formed by the cylinder bore 11 and the end plugs 27 and 33 forming a master cylinder 34. This master cylinder 34 is followed by an extension cylinder 35, the left-hand end component of which can be formed by the plug 33 screwed into the cylinder bore 11 of the master cylinder 34. In the extension cylinder there is a tensioning piston 36, through which the interior of the extension cylinder 35 is divided into two chambers 37 and 38. A channel 39 and 40 opens into each chamber 37 and 38 in front of and behind the tensioning piston, taking into account the entire piston stroke, a pump 42 driven by a motor 41 and a control valve 43 being connected between the channels 39 and 40.

Bei den aus den Fig. 1 bis 5 ersichtlichen Ausführungsbeispielen ist der Spannkolben 36 mit einer den Stopfen 33 abgedichtet durchsetzenden Kolbenstange 44 verbunden, die ihrerseits mit einer Druckscheibe 45 verbunden ist, die selbst im drucklosen Raum des Hauptzylinders 34 längsverschiebbar angeordnet ist und in Schließlage des Türflügels am Kolbenkopf 16 anliegt. Dabei bildet der Spannkolben 36 zusammen mit der Kolbenstange 44 und der Druckscheibe 45 ein Stützglied 46, durch welches die Federanordnung 47 in einer unwirksamen Lage abstützbar ist. Dabei ist die aus einer Druckfeder gebildete Federanordnung '47 bei den aus den Fig. 1 bis 5 ersichtlichen Ausführungsbeispielen ebenfalls im drucklosen Raum des Hauptzylinders 34 angeordnet und stützt sich mit einem Ende am Stopfen 33 des Fortsatzzylinders 35 ab, während das andere Ende der Druckfeder 47 die Druckscheibe 45 beaufschlagt. Durch diese Druckfeder 47 wird der Dämpfungskolben 14 beaufschlagt. Durch diese Druckfeder 47 wird der Dämpfungskolben 14 aus jeder Öffnungslage sicher in die aus den Fig. ersichtliche, einer Schließstellung der Tür entsprechenden Lage zurückgeschoben, wenn in der Kammer 37 des Fortsatzzylinders 35 dem Spannkolben 36 kein Widerstand entgegengesetzt wird. Wenn jedoch über die Pumpe 42 in der Kammer 37 des Fortsatzzylinders ein solcher Druck erzeugt wird, daß die Kraft der Federanordnung 47 überwunden ist, so bewegt sich der Spannkolben 36 nach rechts, wodurch über die mit ihm verbundene Druckscheibe 45 der Dämpfungskolben 14 freigegeben wird, so daß dieser ohne Kraftaufwand in eine der Türöffnungslage entsprechende Stellung überführt werden könnte. Um jedoch sicherzustellen, daß am Dämpfungskolben 14 jederzeit eine im Rückstellsinn wirkende Kraft angreift, ist der Dämpfungskolben von einem zweiten, eine geringere Kraft als die Federanordnung 47 äußernden Kraftspeicher48 ständig im Schließsinn belastet.In the embodiments shown in FIGS. 1 to 5, the tensioning piston 36 is connected to a piston rod 44 sealingly passing through the stopper 33, which in turn is connected to a pressure plate 45, which is arranged to be longitudinally displaceable even in the unpressurized space of the master cylinder 34 and in the closed position of the Door wing rests on the piston head 16. The tensioning piston 36 together with the piston rod 44 and the pressure plate 45 forms a support member 46, by means of which the spring arrangement 47 can be supported in an inactive position. The spring assembly formed of a compression spring '47 is arranged in the in FIGS. 1 apparent to 5 embodiments also in unpressurized chamber of the master cylinder 34 and is supported with one end on the plug 33 of the extension cylinder 35, while the other end of the pressure spring 47 the pressure plate 45 acts. The damping piston 14 is acted upon by this compression spring 47. By means of this compression spring 47, the damping piston 14 is reliably pushed out of every open position into the position shown in FIG. 1, corresponding to a closed position of the door, when the tensioning piston 36 is not opposed to any tension in the chamber 37 of the extension cylinder 35. If, however, such a pressure is generated by the pump 42 in the chamber 37 of the extension cylinder that the force of the spring arrangement 47 is overcome, the tensioning piston 36 moves to the right, as a result of which the damping piston 14 is released via the pressure disk 45 connected to it. so that this could be transferred into a position corresponding to the door opening position without effort. However, in order to ensure that a force acting in the return direction acts on the damping piston 14 at all times, the damping piston is constantly loaded in the closing direction by a second force accumulator 48, which exerts less force than the spring arrangement 47.

Bei dem aus Fig. 1 ersichtlichen Ausführungsbeispiel ist der Kraftspeicher 48 durch eine mit einem Ende am Kolbenkopf 15 angreifende Zugfeder 49 gebildet, deren anderes Ende am Stopfen 27 des Hauptzylinders 34 befestigt ist. Wenn nun ein mit dem Türschließer gemäß Fig. 1 ausgestatteter Türflügel ausgehend von seinem Schließzustand geöffnet werden soll, so wird zunächst über einen beispielsweise durch die Schloßfalle zu bestätigenden Türkontakt 50 einer zwischen das Stromnetz und den Elektromotor 41 geschalteten Steuerlogik 51 ein diese aktivierender Impuls ausgelöst, wodurch der Motor 41 eingeschaltet wird und über die Pumpe 42 aus der Kammer 38 in die Kammer 37 über die Kanäle 40 und 39 Druckmittel fördert, so daß der Spannkolben 36 gegen die Kraft der Federanordnung 47 nach rechts bewegt wird. Dabei wird der Verschiebeweg des den Spannkolben 36 und die Druckscheibe 45 umfassenden Stützgliedes 46 durch die in der Steuerlogik eingestellte Motorlaufzeit bestimmt, die derart eingestellt sein mag, daß das stützglied 46 einen einem bestimmten Türöffnungswinkel entsprechenden Betrag vorausgeeilt ist. Damit ist zunächst die Wirkung der Federanordnung 47 vom Dämpfungskolben 14 aufgehoben. Wird nun der Türflügel tatsächlich geöffnet, so wird der Dämpfungskolben 14 lediglich gegen die schwache Rückstellkraft der Zugfeder 49 bewegt, wobei im Druckraum 20 ein Unterdruck entsteht, der von dem Tauchspulensystem 32 in einen elektrischen Impuls für die Steuerlogik 44 umgewandelt wird, so daß der Motor 41 erneut eingeschaltet wird, um die Federanordnung 47 weiter vorzuspannen, und zwar immer entsprechend dem der Türflügelbewegung voreilenden Betrag, der bei geschlossener Tür eingestellt wurde. In dem Augenblick, in welchem der Türflügel seine Öffnungsbewegung beendet, steigt der Unterdruck in der Druckkammer vor dem Kolbenkopf 15 auf den normalen Wert an, wodurch die Meßwertänderung des Tauchspulensystems einen Impuls zur Abschaltung des Motors gibt. Dadurch fördert die Pumpe 42 nach Stillstand des Motors kein Druckmittel mehr, so daß der eingestellte Volumenzustand vor und hinter dem Spannkolben 36 aufrechterhalten bleibt und dieser somit die Federanordnung 47 in der eingestellten Lage festhält. Wird jetzt jedoch der Türflügel losgelassen, so wird auch sofort durch die Zugfeder 49 der Dämpfungskolben im Schließsinne bewegt, wodurch auch der Türflügel in seine Schließlage überführt wird. Im Normalfall wird die Schließung des Türflügels allein durch die Wirkung des eine geringe Schließkraft äußernden Kraftspeichers 48 erfolgen. Damit jedoch in jedem Fall, insbesondere jedoch in Falle eines große Sogkräfte verursachenden Brandes der Türflügel sicher geschlossen werden kann, wird in jedem Fall nach einer kurzen, vorgewählten Wartezeit die Steuerlogik 51 das Steuerventil 43 derart umsteuern, daß das Druckmittel aus der Kammer 37 vor dem Spannkolben 36 in die Kammer 38 hinter dem Spannkolben zurückfließen kann. Dadurch kann die Federanordnung 47 im Schließsinne auf den Dämpfungskolben 14 voll einwirken. Während der Schließbewegungen des Türflügels wird jedoch diese Bewegung wie bei jedem herkömmlichen Türschließer durch das in die Kanäle 21, 24, 25 und 26 eingreifende Drosselventil 22 hydraulisch gedämpft.In the embodiment shown in FIG. 1, the energy accumulator 48 is formed by a tension spring 49 engaging with one end on the piston head 15, the other end of which is attached to the plug 27 of the master cylinder 34. If a door leaf equipped with the door closer according to FIG. 1 is now to be opened on the basis of its closed state, then a control logic 51 connected between the power supply and the electric motor 41 is triggered via a door contact 50 to be confirmed, for example, by the lock latch. whereby the motor 41 is switched on and, via the pump 42, delivers pressure medium from the chamber 38 into the chamber 37 via the channels 40 and 39, so that the tensioning piston 36 is moved to the right against the force of the spring arrangement 47. The displacement path of the support member 46 comprising the tensioning piston 36 and the pressure plate 45 is determined by the engine running time set in the control logic, which may be set such that the support member 46 is ahead of an amount corresponding to a certain door opening angle. The effect of the spring arrangement 47 from the damping piston 14 is thus initially canceled. If the door leaf is actually opened, the damping piston 14 is only moved against the weak restoring force of the tension spring 49, a negative pressure being generated in the pressure chamber 20, which is converted by the moving coil system 32 into an electrical pulse for the control logic 44, so that the motor 41 is turned on again to further bias the spring assembly 47, always according to the amount leading the door leaf movement, which was set when the door was closed. At the moment when the door leaf ends its opening movement, the negative pressure in the pressure chamber in front of the piston head 15 rises to the normal value, whereby the change in the measured value of the moving coil system gives an impulse to switch off the motor. As a result, the pump 42 no longer delivers pressure medium after the motor has come to a standstill, so that the set volume state in front of and behind the tensioning piston 36 is maintained and this thus holds the spring arrangement 47 in the set position. However, if the door leaf is now released, the tension spring 49 immediately the damping piston moves in the closing direction, which also brings the door leaf into its closed position. In the normal case, the door leaf is closed solely by the action of the energy accumulator 48, which exerts a low closing force. So that in any case, but especially in the event of a fire causing large suction forces, the door leaf can be safely closed, the control logic 51 will reverse the control valve 43 in such a way that the pressure medium from the chamber 37 before the Tensioning piston 36 can flow back into the chamber 38 behind the tensioning piston. As a result, the spring arrangement 47 can act fully on the damping piston 14 in the closing direction. During the closing movements of the door leaf, however, this movement is hydraulically damped, as in any conventional door closer, by the throttle valve 22 which engages in the channels 21, 24, 25 and 26.

Es versteht sich, daß bei Stromausfall der Elektromotor und auch die Steuerlogik unwirksam ist, was bedeutet, daß neben dem ständig auf den Dämpfungskolben 14 im Schließsinn einwirkenden Kraftspeicher 48 auch die Federanordnung 47 ständig einwirkt.It goes without saying that in the event of a power failure, the electric motor and also the control logic are ineffective, which means that, in addition to the force accumulator 48 which constantly acts on the damping piston 14 in the closing direction, the spring arrangement 47 also acts continuously.

Bei der aus den Fig. 2 und 3 ersichtlichen Ausführungsform ist der den Dämpfungskolben 14 ständig beaufschlagende Kraftspeicher 48 als Druckfeder 52 ausgebildet, die zusammen mit der Federanordnung 47 gleichachsig im drucklosen Raum des Hauptzylinders 34 angeordnet ist. Die gegenüber der Federanordnung 47 wesentlich schwächer ausgebildete Druckfeder 52 stützt sich einerends unmittelbar am Kolbenkopf 16 und andernends an der Verschlußkappe 53 eines Stützrohres 54 ab, das seinerseits am Stopfen 33 gehaltert ist und die Kolbenstange 44 mit Spiel umschließt. Die Druckfeder 52 ist von einer Schiebehülse 55 umfaßt, die ihrerseits jedoch in die Federanordnung 47 eingreift und an ihrem dem Kolbenkopf 16 zugekehrten Ende einen die Druckscheibe 45 bildenden Kragen aufweist, an dem einerends die Federanordnung abgestützt ist, die mit ihrem anderen Ende am Stopfen 33 des Fortsatzzylinders 35 das Stützrohr 54 übergreifend anliegt. Das Stützrohr 54 weist an seiner Mantelfläche zwei einander diametral gegenüberliegende Schlitze 56 auf, in welche Kupplungsfinger 57 der Schiebehülse 55 eingreifen, die eine die Kolbenstange 44 ringwulstartig übergreifende und mit dieser verbundene Scheibe 58 hinterfassen.In the embodiment shown in FIGS. 2 and 3, the force accumulator 48, which acts continuously on the damping piston 14, is designed as a compression spring 52, which is arranged together with the spring arrangement 47 coaxially in the unpressurized space of the master cylinder 34. The compression spring 52, which is designed to be significantly weaker than the spring arrangement 47, is supported on one end directly on the piston head 16 and on the other end on the closure cap 53 of a support tube 54, which in turn is held on the plug 33 and surrounds the piston rod 44 with play. The compression spring 52 is encompassed by a sliding sleeve 55, which in turn engages in the spring arrangement 47 and has at its end facing the piston head 16 a collar which forms the thrust washer 45, on one end of which the spring arrangement is supported, the other end of which is attached to the stopper 33 of the extension cylinder 35, the support tube 54 abuts. The support tube 54 has on its outer surface two diametrically opposed slots 56, into which coupling fingers 57 of the sliding sleeve 55 engage, which grip a disk 58 which overlaps the piston rod 44 and is connected to it.

Das aus den Fig. 4 und 5 ersichtliche Ausführungsbeispiel entspricht weitgehend den aus den Fig. 1 sowie 2 und 3 ersichtlichen Ausführungsbeispielen. Allerdings wurde dort als den Dämpfungskolben 14 ständig beaufschlagender Kraftspeicher 48 eine Spiralfeder 59 eingesetzt, die einerends über einen Stift 60 mit dem Gehäuse 10 des Türschließers verbunden ist, während die Spiralfeder 59 andernends mit einem Federlappen 61 in eine Nut der Schließerwelle 12 eingreift. Die Funktionsweise der aus den Fig. 2 und 3 sowie 4 und 5 ersichtlichen Ausführungsbeispiele ist die gleiche, wie bei dem aus Fig. 1 ersichtlichen Ausführungsbeispiel.The embodiment shown in FIGS. 4 and 5 largely corresponds to the embodiments shown in FIGS. 1 and 2 and 3. However, a spiral spring 59 was used there as the energy accumulator 48, which constantly acts on the damping piston 14 and is connected at one end to the housing 10 of the door closer via a pin 60, while the other end engages with a spring tab 61 in a groove of the closer shaft 12. The mode of operation of the exemplary embodiments shown in FIGS. 2 and 3 and 4 and 5 is the same as in the exemplary embodiment shown in FIG. 1.

In Fig. 6 ist ein weiteres Ausführungsbeispiel des erfindungsgemäßen Türschließers dargestellt, bei welchem die Federanordnung 47 in die Kammer 38 des Fortsatzzylinders 35 verlegt ist. Diese Federanordnung 47 stützt sich einerends am Spannkolben 36 und andernends am endseitigen Verschlußstopfen 62 des Fortsatzzylinders 35 ab. Im drucklosen Raum des Hauptzylinders 34 ist der den Dämpfungskolben 14 ständig beaufschlagende Kraftspeicher 48 angeordnet, der auch bei diesem aus Fig. 6 ersichtlichen Ausführungsbeispiel als Druckfeder 63 ausgebildet ist. Der Spannkolben 36 ist fest mit einer Druckstange 64 verbunden, die einerseits den Stopfen 33 des Fortsatzzylinders 35 unter Zwischenschaltung eines Dichtringes 65 durchgreift und im drucklosen Raum des Hauptzylinders 34 im Inneren der Druckfeder 63 bis zum Kolbenkopf 16 des Dämpfungskolbens 14 vorragt und mit einer Stützkuppe 66 an der äußeren Stirnfläche des Kolbenkopfes 16 zur Anlage kommt. Die Druckstange 64 bildet somit eine Verbindung zwischen dem Spannkolben 36 und dem Dämpfungskolben 14. Ausgehend von der in Fig. 6 dargestellten Schließlage erfolgt bei Betätigung des Türkontaktes 50 über beispielsweise die Schloßfalle des Türflügels durch die Steuerlogik 51 eine Einschaltung des Motors 41 und damit eine Inbetriebnahme der Pumpe 42. Diese fördert bei geschlossenem Steuerventil 43 über das Rückschlagventil 67 aus der Kammer 38 über den Kanal 39 Druckmittel in die Druckkammer 37, wodurch der Spannkolben 36 nach rechts unter Zusammendrückung der Federanordnung 47 bewegt wird. Dadurch entfernt sich auch die Stützkuppe 66 der Druckstange 64 von der Stirnfläche des Kolbenkopfes 16, so daß der Dämpfungskolben 14 von der Kraft der Federanordnung 47 entlastet wird und auf diesen lediglich noch die Kraft der Druckfeder 63 einwirkt. Auch in diesem Fall wird der Verschiebeweg des Spannkolbens 36 und der damit verbundenen Druckstange 64 von der in der Steuerlogik eingestellten Motorlaufzeit bestimmt, so daß sich für die Türöffnungsbewegung eine bestimmte Voreilung der Druckstange 64 ergibt. Außerdem wird auch hier der Voreilweg durch die Drucküberwachung des Tauchspulensystems 32 im wesentlichen konstant gehalten, so daß während des Öffnungsvorganges der Tür dieser Öffnungsbewegung nur die aus der Druckfeder 63 geäußerte Kraft entgegenwirkt. Wenn nun der Türflügel angehalten oder gar losgelassen wird, erfolgt über die Drucküberwachung des Tauchspulensystems 32 und die Steuerlogik 51 eine Abschaltung des Motors 41, und weiterhin wird zeitverzögert durch die Steuerlogik 51 an das Steuerventil 43 der Impuls gegeben, die Kanäle 39 und 40 über den zur Pumpe 42 angeordneten Parallelkanal 68 kurzzuschließen, so daß ein Rückfluß des Druckmittels aus der Kammer 37 in die Kammer 38 erfolgen kann und somit die Federanordnung 47 im Schließsinne den Spannkolben 36 bewegt, welcher über die Druckstange 64 den Dämpfungskolben 14 unterstützt durch die schwächere Druckfeder 63 im Schließsinne vorschieben kann. Dabei sind die beiden drucklosen Räume des Hauptzylinders 34 und des Fortsatzzylinders 35 durch einen Ausgleichskanal 69 miteinander verbunden. Bei normaler Benutzung des Türflügels, d. h. nach dem Loslassen des Türflügels aus seiner Öffnungslage wird in der Regel bereits die geringere Schließkraft der Druckfeder 63 ausreichen, um den Türflügel zu schließen, bevor durch die Steuerlogik 51 zeitverzögert das Steuerventil 43 geöffnet wird, wonach erst die Federanordnung 47 im Schließsinne wirksam werden kann.6 shows a further exemplary embodiment of the door closer according to the invention, in which the spring arrangement 47 is moved into the chamber 38 of the extension cylinder 35. This spring arrangement 47 is supported at one end on the tensioning piston 36 and at the other end on the end plug 62 of the extension cylinder 35. In the unpressurized space of the master cylinder 34, the force accumulator 48, which acts continuously on the damping piston 14, is arranged as a compression spring 63 in this embodiment shown in FIG. 6. The tensioning piston 36 is firmly connected to a push rod 64 which, on the one hand, engages through the plug 33 of the extension cylinder 35 with the interposition of a sealing ring 65 and projects in the unpressurized space of the master cylinder 34 inside the compression spring 63 to the piston head 16 of the damping piston 14 and with a support dome 66 comes to rest on the outer end face of the piston head 16. The push rod 64 thus forms a connection between the tensioning piston 36 and the damping piston 14. Starting from the closed position shown in FIG. 6, when the door contact 50 is actuated, the control logic 51 switches on the motor 41 and thus starts it up, for example via the lock latch of the door leaf the pump 42. When the control valve 43 is closed, this conveys pressure medium from the chamber 38 via the check valve 39 via the channel 39 into the pressure chamber 37, as a result of which the tensioning piston 36 is moved to the right while compressing the spring arrangement 47. This also removes the support dome 66 of the push rod 64 from the end face of the piston head 16, so that the damping piston 14 is relieved of the force of the spring arrangement 47 and only the force of the compression spring 63 acts on it. In this case too, the displacement of the tensioning piston 36 and the associated push rod 64 is determined by the motor running time set in the control logic, so that the push rod 64 leads to a certain advance for the door opening movement. In addition, the advance path is kept essentially constant by the pressure monitoring of the moving coil system 32, so that only the force expressed by the compression spring 63 counteracts this opening movement during the opening process of the door. If the door leaf is now stopped or even released, the pressure of the moving coil system 32 and the control logic 51 is used to switch off the motor 41, and the control logic 51 also gives the control valve 43 a time-delayed impulse, channels 39 and 40 via the to short-circuit the parallel channel 68 arranged to the pump 42 so that the pressure medium can flow back from the chamber 37 into the chamber 38 and thus the spring arrangement 47 moves the tensioning piston 36 in the closing direction, which can support the damping piston 14 by means of the weaker compression spring 63 in the closing direction via the push rod 64. The two unpressurized spaces of the master cylinder 34 and the extension cylinder 35 are connected to one another by an equalizing channel 69. With normal use of the door leaf, that is to say after the door leaf has been released from its open position, the lower closing force of the compression spring 63 is usually sufficient to close the door leaf before the control valve 51 opens the control valve 43 with a time delay, after which the spring arrangement only occurs 47 can take effect in the closing sense.

Bei dem aus Fig. 7 ersichtlichen Ausführungsbeispiel ist ebenfalls die Federanordnung 47 im Fortsatzzylinder 35 angeordnet und stützt sich einerseits an dessen Verschlußstopfen 62 und andererseits am Spannkolben 36 ab. Die durch den Spannkolben 36 unterteilten Kammern 37 und 38 sind ebenfalls über Kanäle 39 und 40 miteinander verbunden, zwischen die eine durch einen Elektromotor 41 betriebene Pumpe 42 mit nachfolgendem Rückschlagventil 67 geschaltet ist. Im Hauptzylinder 34 ist außer dem die Schlie- ßerweIle 12 betätigenden Dämpfungskolben 14 auch, wie bei dem aus Fig. 6 ersichtlichen Ausführungsbeispiel der den Dämpfungskolben 14 im Schließsinn beaufschlagende Kraftspeicher 48 in Form einer Druckfeder 63 angeordnet, die einerends am Kolbenkopf 16 und andernends am den Hauptzylinder 34 vom Fortsatzzylinder 35 trennenden Stopfen 33 abgestützt ist. Bei diesem Ausführungsbeispiel ist der Kolbenkopf 16 des Dämpfungskolbens 14 gegenüber der Zylinderbohrung 11 abgedichtet.In the embodiment shown in FIG. 7, the spring arrangement 47 is also arranged in the extension cylinder 35 and is supported on the one hand on its sealing plug 62 and on the other hand on the tensioning piston 36. The chambers 37 and 38 subdivided by the tensioning piston 36 are likewise connected to one another via channels 39 and 40, between which a pump 42 operated by an electric motor 41 with subsequent check valve 67 is connected. In the master cylinder 34, in addition to the damping piston 14 actuating the closer 12, the force accumulator 48 in the form of a compression spring 63, which acts on the damping piston 14 in the closing direction, is also arranged, as in the embodiment shown in FIG. 6, in the form of a compression spring 63, one end of the piston head 16 and the other end Master cylinder 34 is supported by plug 33 separating extension cylinder 35. In this exemplary embodiment, the piston head 16 of the damping piston 14 is sealed off from the cylinder bore 11.

Diese aus Fig. 7 ersichtliche Ausführungsform zeigt auf der Zeichnung das System in absoluter Ruhelage, d. h. daß alle Funktionsgeber bzw. Kontrollgeräte sich in unbetätigter Stellung befinden. Ausgehend von der Schließstellung des Türflügels, bei der die Schloßfalle im Schließblech eingerastet ist, befindet sich der Türkontakt 50 in geschlossener Stellung und hat somit den ein Zeit-Verzögerungsglied 76 aufweisenden Stromkreis eines Magnetventiles 43' geschlossen. In dieser Stellung ist der Kanal 70 vom Druckraum 37 des Fortsatzzylinders 35 gesperrt, während gleichzeitig die Kanäle 72 und 77 aus dem die Druckfeder 63 aufweisenden Raum mit dem in den drucklosen Raum des Hauptzylinders mündenden Kanal 71 verbunden sind.This embodiment shown in FIG. 7 shows the system in the absolute rest position on the drawing, i. H. that all function generators and control devices are in the unactuated position. Starting from the closed position of the door leaf, in which the lock latch is latched into the striking plate, the door contact 50 is in the closed position and has thus closed the circuit of a solenoid valve 43 'which has a time delay element 76. In this position, the channel 70 is blocked by the pressure space 37 of the extension cylinder 35, while at the same time the channels 72 and 77 from the space having the compression spring 63 are connected to the channel 71 opening into the unpressurized space of the master cylinder.

An den Motor41 ist unabhängig von der Türstellung und somit auch unabhängig von der Stellung des Türkontaktes 50 über den mittels der Leitung 75 an die Druckkammer 37 angeschlossenen Druckschalter 74 immer dann eine Betriebsspannung angelegt, wenn der im Druckschalter 74 eingestellte Schaltdruck unterschritten wird. Sobald der Schaltdruck des Druckschalters 74 unterschritten ist, wird der Stromkreis zum Motor 41 geschlossen, so daß der Motor anläuft und über die Pumpe 42 aus der drucklosen Kammer 38 des Fortsatzzylinders 35 über den Ansaugkanal 40 und den Druckkanal 39 das Druckmittel in die Druckkammer 37 fördert. Durch Druckaufbau in der Kammer 37 wird der Kolben 36 im Fortsatzzylinder 35 gegen den Druck der Feder 47 so weit nach rechts verschoben, bis der der gewünschten Schließkraft entsprechende, am Druckschalter 74 eingestellte Druck erreicht bzw. überschritten ist, so daß der Druckschalter 74 durch den über die mit der Druckkammer verbundene Leitung 75 anstehenden Druck umschaltet und den Motorstromkreis unterbricht.An operating voltage is always applied to the motor 41 regardless of the door position and thus also independently of the position of the door contact 50 via the pressure switch 74 connected to the pressure chamber 37 by means of the line 75 when the switching pressure set in the pressure switch 74 falls below. As soon as the switching pressure of the pressure switch 74 is undershot, the circuit to the motor 41 is closed, so that the motor starts and conveys the pressure medium into the pressure chamber 37 via the pump 42 from the unpressurized chamber 38 of the extension cylinder 35 via the suction channel 40 and the pressure channel 39 . By building up pressure in the chamber 37, the piston 36 in the extension cylinder 35 is pushed so far to the right against the pressure of the spring 47 until the pressure set at the pressure switch 74 corresponding to the desired closing force is reached or exceeded, so that the pressure switch 74 by the switches the pressure present via the line 75 connected to the pressure chamber and interrupts the motor circuit.

Die für eine sichere Türschließung maximal erforderliche Energie ist jetzt in der Druckkammer 37 des Fortsatzzylinders 35 enthalten und wird dort durch die Federanordnung 47 gespeichert, da einerseits der Rückfluß über den Kanal 39 durch das Rückschlagventil 67 gesperrt ist und andererseits der Kanal 70 im Magnetventil 43' blockiert ist. Wird jetzt die Tür geöffnet, so schaltet der Türkontakt 50 ab und unterbricht den Stromkreis zum Magnetventil 43', das dann in seine andere Steuerlage überführt wird. Zunächst jedoch bleibt das Magnetventil 43 noch für eine am Zeitglied 76 eingestellte Zeitdauer (wählbar bis 20 Sekunden) in seiner geschlossenen Stellung. Die Tür läßt sich gegen die geringe Kraft der Druckfeder 63 öffnen, wobei das aus dem die Druckfeder 63 aufweisenden Raum verdrängte Hydraulikmedium zunächst über den Kanal 77 durch das Magnetventil 43' und den Kanal 71 in den drucklosen Raum des Hauptzylinders frei überströmen kann. Sobald der Kolbenkopf 16 die Mündung des mit Abstand vor dem Kanal 72 in den Hauptzylinder mündenden Kanales 77 überlaufen hat, wird das Druckmittel zwangsläufig über den drosselbaren Kanal 72 geleitet, womit eine Öffnungsdämpfung erzielt wird. Nach Beendigung der Öffnungsbewegung der Tür setzt sofort die Schließbewegung unter dem relativ geringen Druck der Druckfeder 63 ein, wobei das über das Rückschlagventil 18 bei der Öffnungsbewegung in den Druckraum 20 vor dem Kolbenkopf 15 gelangte Druckmittel über die vorgenannte Drosseleinrichtung 24, 21, 22, 23, 26 in den drucklosen Raum und von dort über den Kanal 71, das Magnetventil 43' und die Kanäle 72 bzw. 77 in den die Druckfeder 63 aufweisenden Raum des Hauptzylinders abfließen kann. In dieser Flußrichtung wird das Druckmittel von der im Drossel-Rückschlagventil 73 befindlichen Drossel nicht gebremst, sondern fließt frei über das Rückschlagventil in den die Druckfeder 63 aufweisenden Raum ab.The maximum energy required for secure door closure is now contained in the pressure chamber 37 of the extension cylinder 35 and is stored there by the spring arrangement 47, since on the one hand the return flow through the channel 39 is blocked by the check valve 67 and on the other hand the channel 70 in the solenoid valve 43 ' is blocked. If the door is now opened, the door contact 50 switches off and interrupts the circuit to the solenoid valve 43 ', which is then transferred to its other control position. First, however, the solenoid valve 43 remains in its closed position for a period of time set on the timer 76 (selectable up to 20 seconds). The door can be opened against the low force of the compression spring 63, the hydraulic medium displaced from the space having the compression spring 63 initially being able to flow freely through the channel 77 through the solenoid valve 43 'and the channel 71 into the unpressurized space of the master cylinder. As soon as the piston head 16 has overflowed the mouth of the channel 77 opening into the master cylinder at a distance from the channel 72, the pressure medium is inevitably conducted via the throttled channel 72, with the result that opening damping is achieved. After the opening movement of the door has ended, the closing movement starts immediately under the relatively low pressure of the compression spring 63, the pressure medium coming into the pressure chamber 20 in front of the piston head 15 during the opening movement via the aforementioned throttle device 24, 21, 22, 23 , 26 into the unpressurized space and from there via the channel 71, the solenoid valve 43 'and the channels 72 and 77 can flow into the space of the master cylinder having the compression spring 63. In this flow direction, the pressure medium is not braked by the throttle located in the throttle check valve 73, but flows freely via the check valve into the space having the compression spring 63.

Ist die Tür vor Ablauf der im Zeitglied 76 vorgewählten Zeit wieder geschlossen und hat die Schloßfalle im Schließblech eingerastet, so schaltet der Türkontakt 50 wieder um und schließt den Stromkreis zum Magnetventil 43', d. h. die geschlossene Position des Magnetventiles für den Druckkanal 70 bleibt erhalten und die in der Druckkammer 37 des Fortsatzzylinders 35 gespeicherte Energie wird nicht abgefragt, da sie in diesem Fall für die sichere Schließung der Tür nicht benötigt wurde. Ist die für das bequeme Begehen der Tür bewußt niedrig gehaltene Schließkraft der Druckfeder 63 nicht groß genug, um die Tür sicher zu schließen, so wird nach Ablauf der im Zeitglied 76 vorgewählten Zeit das Magnetventil spannungslos und schaltet um, so daß nunmehr der Kanal 70 direkt mit den Kanälen 72 und 77 verbunden ist und die in der Druckkammer 37 des Fortsatzzylinders 35 gespeicherte Energie direkt vor den Kolbenkopf 16 des Türschließerkolbens 14 geleitet wird und die Tür unter dem nun zur Verfügung stehenden maximalen Druck sicher geschlossen werden kann, bis der Schloßkontakt 50 durch die Schloßfalle betätigt. wieder den Stromkreis des Magnetventiles 43' schließt. Durch den Druckabfall in der Druckkammer 37 des Fortsatzzylinders 35 wird der Schaltdruck im Druckschalter 74 unterschritten, d. h. der Druckschalter 74 schaltet um und schließt den Motorstromkreis. Der Motor 41 läuft dann sofort wieder an und treibt die Pumpe 42, um sofort wieder die benötigte Energie zur Verfügung zu stellen.If the door is closed again before the time preselected in the timer 76 and the latch has latched into the striking plate, the door contact 50 switches over again and closes the circuit to the solenoid valve 43 ', ie the closed position of the solenoid valve for the pressure channel 70 is retained and the energy stored in the pressure chamber 37 of the extension cylinder 35 is not queried, since in this case it was not required for the safe closing of the door. If the closing force of the compression spring 63, which is deliberately kept low for easy access to the door, is not large enough, In order to close the door safely, the solenoid valve is de-energized and switches over after the time preselected in the timer 76, so that the channel 70 is now connected directly to the channels 72 and 77 and the energy stored in the pressure chamber 37 of the extension cylinder 35 is passed directly in front of the piston head 16 of the door closer piston 14 and the door can be securely closed under the maximum pressure now available until the lock contact 50 is actuated by the lock latch. closes the circuit of the solenoid valve 43 'again. Due to the pressure drop in the pressure chamber 37 of the extension cylinder 35, the switching pressure in the pressure switch 74 is not reached, ie the pressure switch 74 switches over and closes the motor circuit. The motor 41 then starts up again immediately and drives the pump 42 in order to immediately make the required energy available again.

Sollte aus irgendeinem Grund, z. B. Stromausfall, die Fremdenergie nicht zur Verfügung stehen, so arbeitet das Gerät als normaler Türschließer mit seiner maximalen Schließkraft, indem das in dem die Druckfeder 63 aufweisenden Raum des Hauptzylinders 34 bei der Türöffnung zu verdrängende Druckmittel über die Kanäle 77 bzw. 72, das Magnetventil 43' und den Fortsatzkanal 70 direkt vor den Kolben 36 des Fortsatzzylinders 35 gepreßt wird, wobei der für die Kompression der Federanordnung 47 erforderliche Druck vom Begeher bei der Türöffnung aufgebracht werden muß. Bei der durch die Türöffnungsbewegung erfolgenden Verschiebung des Dämpfungskolbens 14 und damit auch des Spannkolbens 36 nach rechts wird das in der die Federanordnung 47 aufweisenden Kammer 38 befindliche Druckmittel über eine mit dem Kanal 40 verbundene Leitung 78 dem drucklosen Zylinderraum links vom Kolbenkopf 16 zugeführt. Der vom Begeher aufgebrachte Schließdruck der Federanordnung steht dann für die Türschließbewegung in umgekehrter Durchflußfolge wieder zur Verfügung.Should for any reason, e.g. B. Power failure, the external energy is not available, the device works as a normal door closer with its maximum closing force by the pressure medium to be displaced in the room of the master cylinder 34 having the compression spring 63 when opening the door via the channels 77 and 72, respectively Solenoid valve 43 'and the extension channel 70 is pressed directly in front of the piston 36 of the extension cylinder 35, the pressure required for the compression of the spring arrangement 47 having to be applied by the attendant when the door is opened. When the damping piston 14 and thus also the tensioning piston 36 move to the right as a result of the door opening movement, the pressure medium in the chamber 38 having the spring arrangement 47 is fed via a line 78 connected to the channel 40 to the unpressurized cylinder space to the left of the piston head 16. The closing pressure of the spring arrangement applied by the viewer is then available again for the door closing movement in the reverse flow sequence.

Wie bereits erwähnt, geben die dargestellten Ausführungen die Erfindung nur beispielsweise wieder, die keinesfalls allein darauf beschränkt ist. Es sind vielmehr noch mancherlei Änderungen und andere Ausgestaltungen der Erfindung möglich. So ist es beispielsweise denkbar, statt der vorbeschriebenen hydraulischen Vorspannung der Federanordnung 47 auch mechanische Vorspannmittel, wie beispielsweise Getriebe u. dgl., einzusetzen. Darüber hinaus ist auch eine pneumatische Vorspannung der Federanordnung 47 denkbar.As already mentioned, the embodiments shown represent the invention only by way of example, which is by no means limited to this. Rather, various changes and other configurations of the invention are possible. For example, instead of the hydraulic preloading of the spring arrangement 47 described above, it is also conceivable to use mechanical preloading means such as gears and the like. Like. To use. In addition, a pneumatic prestressing of the spring arrangement 47 is also conceivable.

Bezugszeichenliste :Reference symbol list:

  • 10 Gehäuse10 housing
  • 11 Bohrung11 hole
  • 12 Schließerwelle12 closer shaft
  • 13 Zahnritzel13 pinions
  • 14 Dämpfungskolben14 damping pistons
  • 15 Kolbenkopf15 piston head
  • 16 Kolbenkopf16 piston head
  • 17 Steg/Zahnstange17 bridge / rack
  • 18 Rückschlagventil18 check valve
  • 19 Überdruckventil19 pressure relief valve
  • 20 Druckraum20 pressure room
  • 21 Stufenbohrung21 step bore
  • 22 Drosselventil22 throttle valve
  • 23 Drosselkegel23 throttle cone
  • 24 Querbohrung24 cross hole
  • 25 Querbohrung25 cross hole
  • 26 Querbohrung26 cross hole
  • 27 Stopfen27 stoppers
  • 28 Kammer28 chamber
  • 29 Stößel29 plungers
  • 30 Kernbolzen30 core bolts
  • 31 Ringspule31 ring coil
  • 32 Tauchspulensystem32 moving coil system
  • 33 Stopfen33 plugs
  • 34 Hauptzylinder34 master cylinders
  • 35 Fortsatzzylinder35 extension cylinders
  • 36 Spannkolben36 tensioning pistons
  • 37 Kammer37 chamber
  • 38 Kammer38 chamber
  • 39 Kanal39 channel
  • 40 Kanal40 channel
  • 41 Motor41 engine
  • 42 Pumpe42 pump
  • 43 Steuerventil43 control valve
  • 43' Dreiwegeventil43 'three-way valve
  • 44 Kolbenstange44 piston rod
  • 45 Druckscheibe45 thrust washer
  • 46 Stützglied46 support member
  • 47 Federanordnung47 spring arrangement
  • 48 Kraftspeicher48 lift mechanism
  • 49 Zugfeder49 tension spring
  • 50 Türkontakt50 door contact
  • 51 Steuerlogik51 Control logic
  • 52 Druckfeder52 compression spring
  • 53 Verschlußkappe53 sealing cap
  • 54 Stützrohr54 support tube
  • 55 Schiebehülse55 sliding sleeve
  • 56 Schlitz56 slot
  • 57 Kupplungsfinger57 clutch fingers
  • 58 Scheibe/Ringwulst58 disc / ring bead
  • 59 Spiralfeder59 coil spring
  • 60 Stift60 pen
  • 61 Federlappen61 feather rags
  • 62 Verschlußstopfen62 Sealing plug
  • 63 Druckfeder63 compression spring
  • 64 Druckstange64 push rod
  • 65 Dichtring65 sealing ring
  • 66 Stützkuppe66 support dome
  • 67 Rückschlagventil67 check valve
  • 68 Parallelkanal68 parallel channel
  • 69 Durchgang69 round
  • 70 Kanal70 channel
  • 71 Kanal71 channel
  • 72 Kanal72 channel
  • 73 Drosselrückschlagventil73 Throttle check valve
  • 74 Druckschalter74 pressure switches
  • 75 Leitung75 line
  • 76 Verzögerungsglied76 delay element
  • 77 Kanal77 channel
  • 78 Leitung78 line

Claims (9)

1. Automatic door closer comprising a closer shaft (12) biased in the closing direction by a spring arrangement (47) and which guides the displaceable piston (14) of a hydraulic piston- cylinder unit which serves for damping purposes, and of which the pressure space (20) is connected to the pressureless space on the one hand, through a return passage (21, 24, 25, 26) in which there is a throttle device (22, 23) and on the other to a non-return valve (18) which opens towards the pressure space (20) there being between the piston (14) and the spring arrangement (47) an inherently movable thrust member (46) adapted to be driven under control by external energy in order to provide initial spring tension as a function of door actuation, characterised in that the damping piston (14) is constantly biased in the direction of closure by a second force storage means (38) which exerts a smaller force than that exerted by the spring arrangement (47).
2. Door closer according to Claim 1, characterised in that the damping piston (14) is on the side opposite the thrust member (46), connected to the bottom (27) of the pressure space (20) by a draw spring (49) which forms the force storage means.
3. Door closer according to Claim 1, characterised in that in addition to the spring arrangement (47), also the force storage means (48) is constructed as a thrust spring (52) which biases the damping piston (14) on the same side as the spring arrangement while bearing constantly on the piston (14).
4. Door closer according to Claim 3, characterised in that the thrust spring (52) constantly biasing the damping piston (14) is enclosed by the spring arrangement (47), one end of which is supported on a fixed abutment (33) on the closer housing (10), while the other end of the spring arrangement (47) bears on the collar (45) of a sliding sleeve (55) which encloses the thrust spring (52) and which is a component part of the inherently movable thrust member (46).
5. Door closer according to Claim 4, characterised in that the sliding sleeve (55) engages around (disposed in the spring arrangement (47) a bracing tube (54) which has on its outer shell slots (56) through which can pass coupling fingers (57) on the sliding sleeve (55) which engages behind the annular bead (58) on a traction rod (44) which can be displaced in the bracing tube (54).
6. Door closer according to Claim 1, characterised in that the force storage means is constructed as a coil spring (59), the inner end (61) of which engages directly on the closer shaft (12) while its other end is fixed on the housing (10) of the door closer.
7. Door closer according to Claim 1 and/or 3, characterised in that the spring arrangement (47) is disposed behind the force storage means (48) which is constructed as a thrust spring and which directly biases the damping piston (14) and in an extension cylinder (35) separate from the main cylinder (34), acts on a tensioning piston (36) which in turn acts via a connection on the damping piston (14) and in the direction of closure.
8. Door closer according to Claim 7, characterised in that the connection between the damping piston (14) and the tensioning piston (36) is formed by a push rod (64) which passes through the wall (33) separating the cylinders (34, 35).
9. Door closer according to Claims 7, characterised in that the connection between damping piston (14) and tensioning piston (36) is constituted by a line (70, 72, 77) carrying pressurised medium and connecting the pressureless space in the main cylinder (34) to the pressure chamber (37) of the extension cylinder (35) which houses the tensioning piston (36), and in that the pressurised medium line (70, 72, 77) can be blocked by a controllable three-way valve (43').
EP85107093A 1984-06-23 1985-06-08 Automatic door closer Expired EP0166285B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3423242A DE3423242C1 (en) 1984-06-23 1984-06-23 Automatic door closer
DE3423242 1984-06-23

Publications (3)

Publication Number Publication Date
EP0166285A2 EP0166285A2 (en) 1986-01-02
EP0166285A3 EP0166285A3 (en) 1986-06-11
EP0166285B1 true EP0166285B1 (en) 1988-07-27

Family

ID=6239003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107093A Expired EP0166285B1 (en) 1984-06-23 1985-06-08 Automatic door closer

Country Status (3)

Country Link
US (1) US4660250A (en)
EP (1) EP0166285B1 (en)
DE (1) DE3423242C1 (en)

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Also Published As

Publication number Publication date
DE3423242C1 (en) 1985-11-07
US4660250A (en) 1987-04-28
EP0166285A3 (en) 1986-06-11
EP0166285A2 (en) 1986-01-02

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