Door closer, closer system and double-leaf door

Abstract

Door closer (10) for an active leaf (320) of a double-leaf door (300) equipped with a closing sequence control (206), in particular a fire and / or smoke protection door, wherein the door closer (10) can be optionally mounted in a first installation position or in a second installation position and comprises: a closer housing (24) that can be arranged on the active leaf (320); a closer piston (32) that is slidably guided in the closer housing (24) and is in particular loaded in the closing direction (30) by a mechanical energy storage device (28), by which a hydraulic volume (33) of the closer housing (24) is divided into a first hydraulic chamber (34) and a second hydraulic chamber (36); a closer shaft (38) rotatably mounted in the closer housing (24), cooperating with the closer piston (32), which can be coupled or is coupled in a rotationally fixed manner to a closer lever (22) of the door closer (10);a flow channel arrangement (42) that fluidly connects the first hydraulic chamber (34) and the second hydraulic chamber (36); a locking unit (26) with a first locking valve (46) arranged in the flow channel arrangement (42) for blocking the hydraulic flow from the first hydraulic chamber (34) to the second hydraulic chamber (36) and thus a closing movement of the closing piston (32) and the guide vane (320) in the first installation position, and a second locking valve (48) arranged in the flow channel arrangement (42) that can be controlled independently of the first locking valve (46) for blocking the hydraulic flow from the first hydraulic chamber (34) to the second hydraulic chamber (36) and thus a closing movement of the closing piston (32) and the guide vane (320) in the second installation position.

Description

[0001] The present invention relates to door closers. Furthermore, the present invention relates to a closer system. Furthermore, the present invention relates to a double-leaf door.

[0002] Double-leaf doors are generally known in the art. They often consist of an active leaf and a fixed leaf, with the fixed leaf remaining closed during normal operation. Such double-leaf doors can be equipped with a door closer system, where each leaf has its own door closer. Since the fixed leaf must be fully closed before the active leaf completes its closing action, door closer systems for double-leaf doors are usually equipped with a closing sequence control. This is particularly important for fire and / or smoke protection doors to ensure reliable operation, especially the complete closure of both leaves in the event of a fire.

[0003] Common locking sequence control systems typically consist of a trigger unit, a transmission unit, and a locking unit. The trigger unit detects when the fixed leaf is opened and initiates the locking sequence control. This signal is then relayed by the transmission unit to the locking unit, which ultimately prevents the active leaf from closing.

[0004] In such door closer systems, a hydraulic lock in the form of a locking valve can be used as the locking unit. This valve is connected via a hydraulic line to the hydraulic system of the door closer associated with the active leaf, allowing the closing movement of the active leaf to be blocked or released depending on the actuation state of the locking valve. When the locking valve is closed, the hydraulic flow between two hydraulic chambers formed within the closer housing and connected to each other via the hydraulic line is blocked. This blocks the closing movement of a closing piston, which is slidably guided within the closer housing of the active leaf door closer and is coupled to a closing shaft rotatably mounted within the closer housing. Consequently, the active leaf remains in a specific position.When the shut-off valve is open, the blockage of the hydraulic flow between the hydraulic chambers is lifted, which allows a closing movement of the closing piston to be released, so that the gate can close, especially automatically.

[0005] The hydraulic system of the door closer also serves the purpose of adjusting at least one closing characteristic of the door closer, for example, the final latching action and / or the closing time of the closing movement of the active leaf. Adjustment of this closing characteristic(s) is usually achieved via at least one regulating valve connected in the hydraulic line, which allows the flow rate of hydraulic fluid within the closer housing between the hydraulic chambers to be regulated.

[0006] If a door closer of this type is to be mounted in different installation positions, the inclusion of a (single) check valve in the hydraulic system can be problematic. For example, in the case of a mechanical actuation of the single check valve, the transmission of a trigger signal to the check valve cannot be reliably ensured across different mounting positions, as the orientation of the closer housing can change depending on the installation position or mounting method of the door closer.

[0007] Against this background, it may be advantageous to provide at least two locking valves for implementing the closing sequence control, although this introduces new challenges. For example, care must be taken to ensure that the reliable closing function of the active leaf door closer is not impaired. Alternatively or additionally, the available installation space in the closer housing of the active leaf door closer is usually limited, placing high demands on space-saving integration. Alternatively or additionally, it would have to be ensured that integrating the locking valves does not negatively affect the other functionalities of the hydraulic system, particularly with regard to the adjustment of at least one closing characteristic of the active leaf door closer.

[0008] It is therefore an object of the present invention to at least partially overcome the disadvantages of known door closers, closer systems, and double-leaf doors described above. In particular, it is an object of the present invention to provide an improved door closer for the active leaf of a double-leaf door, an improved closer system, and an improved double-leaf door. Specifically, it is an object of the present invention to create a door closer for the active leaf of a double-leaf door, a closer system, and a double-leaf door in which the door closer associated with the active leaf can be used efficiently and / or reliably and / or without significantly increasing the adjustment effort for different mounting types.

[0009] The aforementioned problem is solved by the claims. In particular, the problem is solved by a door closer with the features of independent claim 1, by a closer system with the features of independent claim 15, and by a double-leaf door with the features of independent claim 16. Further features and advantages of the closer system and the double-leaf door according to the invention will become apparent from the dependent claims, the description, and the drawings.

[0010] According to a first aspect, the task is solved by a door closer for a moving leaf of a double-leaf door equipped with a closing sequence control, in particular a fire and / or smoke protection door, wherein the door closer can be optionally mounted in a first installation position or in a second installation position and has: a closer housing that can be arranged on the door leaf; a closer piston that is slidably guided in the closer housing and is loaded in the closing direction, in particular by a mechanical energy storage device, by which a hydraulic volume of the closer housing is divided into a first hydraulic chamber and a second hydraulic chamber; a closer shaft rotatably mounted in the closer housing and cooperating with the closer piston, which can be coupled or is coupled in a rotationally fixed manner to a closer lever of the door closer; a flow channel arrangement that fluidly connects the first hydraulic chamber and the second hydraulic chamber to each other;a locking unit with a first locking valve arranged in the flow channel arrangement for blocking the hydraulic flow from the first hydraulic chamber to the second hydraulic chamber and thus a closing movement of the closing piston and the moving leaf in the first installation position of the door closer and a second locking valve arranged in the flow channel arrangement, which can be controlled independently of the first locking valve, for blocking the hydraulic flow from the first hydraulic chamber to the second hydraulic chamber and thus a closing movement of the closing piston and the moving leaf in the second installation position of the door closer;wherein in the first installation position of the door closer, the first locking valve can be controlled via a release unit of the closing sequence control assigned to a fixed leaf of the double-leaf door, depending on an opening angle of the fixed leaf, in order to selectively lock or release the closing movement of the closer piston and thus of the active leaf, and the second locking valve is decoupled from the release unit of the closing sequence control; and wherein in the second installation position of the door closer, the second locking valve can be controlled via the release unit of the closing sequence control, depending on the opening angle of the fixed leaf, in order to selectively lock or release the closing movement of the closer piston and thus of the active leaf, and the first locking valve is decoupled from the release unit of the closing sequence control.

[0011] The door closer according to the invention is designed for the active leaf of a double-leaf door equipped with a closing sequence control, in order to ensure the safe and, in particular, complete closing of the double-leaf door even after the inactive leaf has been opened. The door can, for example, be a fire and / or smoke protection door.

[0012] To provide this closing functionality, the door closer according to the invention comprises a closer housing that can be arranged directly on the active leaf, a piston or closing piston preferably axially displaceable within the closer housing, by which a hydraulic volume of the closer housing is divided into a first hydraulic chamber and a second hydraulic chamber, and a closing shaft rotatably mounted in the closer housing and cooperating with the closing piston. The closing shaft is, in particular, rotationally fixed, connectable to or coupled with a closing lever of the door closer.

[0013] The door closer may further include a slide rail in which a sliding block is slidably mounted. The sliding block may be rotatably connected to one end of the closer lever of the active leaf door closer, the closer lever in turn being connectable or coupled to the closer shaft at its opposite end. However, the door closer is not limited to a slide rail closer, particularly one with a rack and pinion drive.

[0014] The closing piston can be biased in the closing direction by a mechanical energy storage device, in particular a spring element, of the door closer. The mechanical energy storage device is charged during an opening movement of the active leaf and subsequently provides the energy required to perform a closing movement of the active leaf, in particular an automatic one.

[0015] The first hydraulic chamber preferably refers to the volume within the closer housing from which hydraulic fluid flows out during a closing operation of the gate leaf. The second hydraulic chamber preferably refers to the volume within the closer housing into which the hydraulic fluid is returned during a closing operation of the gate leaf. The first hydraulic chamber can be a piston chamber. The second hydraulic chamber can be a spring chamber. Alternatively, the first hydraulic chamber can be a high-pressure chamber and the second hydraulic chamber a low-pressure chamber.

[0016] The first hydraulic chamber and the second hydraulic chamber are fluid-communicating with each other via a flow channel arrangement, preferably a common one. The flow channel arrangement is preferably formed within the closing housing. A flow channel arrangement is preferably understood to be an arrangement of one or more channels or lines that form one or more flow paths for a hydraulic fluid.

[0017] Furthermore, the door closer according to the invention comprises a locking unit with a first locking valve and a second locking valve. The locking unit is preferably part of the closing sequence control. In particular, the locking unit can block the closing movement of the active leaf when a release is triggered by the release unit, which in turn is initiated by the opening of the inactive leaf. For this purpose, the first locking valve and the second locking valve of the locking unit are each integrated into or connected to the flow channel arrangement of the active leaf door closer according to the invention. The locking valves are preferably hydraulic locking valves.

[0018] Furthermore, the shut-off valves can be controlled independently of each other. Independent controllability in this context means that each of the two shut-off valves can be selectively switched, independently of the other, either to a closed state, in which the flow of working medium or hydraulic fluid through the respective shut-off valve is blocked, or to a releasing state, in which the flow of working medium or hydraulic fluid through the respective shut-off valve is allowed.

[0019] Furthermore, the swing-leaf door closer according to the invention can be mounted in at least two installation positions.

[0020] For example, the first of at least two installation positions can correspond to a hinge-side door leaf installation according to DIN right (abbreviated DIN-R), and the second installation position to a hinge-side door leaf installation according to DIN left (abbreviated DIN-L). DIN left and DIN right are part of DIN 107, which defines the opening direction of doors in building construction. With a hinge-side door leaf installation, the closer housing is mounted on the door leaf, and, if present, the guide rail is mounted on the door jamb or frame. In contrast to hinge-side door leaf installation, the closer housing in the case of a hinge-side door leaf installation is mounted on the opposite side of the door, i.e., on the side of the door where the hinges are not visible. These hinge-side installation positions differ primarily in the orientation of the closer housing.In hinge-side door leaf mounting according to DIN-R, the closer housing is typically rotated 180° around a preferably horizontal transverse axis of the door closer, which is oriented perpendicular to the longitudinal axis of the closer shaft and the longitudinal axis of the closer housing, compared to hinge-side door leaf mounting according to DIN-L. It is understood, however, that the door closer according to the invention is not limited to these installation positions. In particular, other installation positions are also possible, such as hinge-side door leaf mounting, hinge-side head mounting, and hinge-side door leaf mounting, preferably in both DIN-R and DIN-L versions.

[0021] In the first installation position of the door closer, it is provided that the first locking valve can be controlled via a release unit of the closing sequence control assigned to a fixed leaf of the double-leaf door, depending on an opening angle of the fixed leaf, in order to selectively block or release the hydraulic flow from the first hydraulic chamber to the second hydraulic chamber and thus the closing movement of the closer piston and the active leaf, and that the second locking valve is decoupled from the release unit of the closing sequence control and / or locks independently.In the second installation position, it is provided that the second shut-off valve can be controlled via the trigger unit of the closing sequence control depending on an opening angle of the fixed leaf, in order to selectively block or release the hydraulic flow from the first hydraulic chamber to the second hydraulic chamber and thus the closing movement of the closing piston and the active leaf, and that the first shut-off valve is decoupled from the trigger unit of the closing sequence control and / or blocks independently.

[0022] A trigger unit of the closing sequence control is preferably provided as part of the closing sequence control for detecting an opening of the fixed leaf, in particular an opening that exceeds a predetermined or correspondingly set opening angle, and is preferably designed to interact with the door closer on the fixed leaf side for this functionality. The triggering event generated by the trigger unit, which in turn is initiated by the opening of the fixed leaf, can be transmitted, for example via a transmission unit, to the respective locking valve of the locking unit of the door closer on the active leaf side.

[0023] The term "decoupled from the triggering unit of the closing sequence control" means, in this context, that the affected shut-off valve is unaffected by a triggering of the closing sequence control by the triggering unit, and in particular, experiences no interaction with the triggering unit and / or a transmission unit of the closing sequence control. Preferably, the shut-off element decoupled from the closing sequence control assumes a locking position for the duration of its decoupling, in particular independently.

[0024] According to a second aspect, the problem is solved by a door closer system for a double-leaf door, in particular a fire and / or smoke protection door, wherein the door closer system comprises a first door closer for a fixed leaf of the door and a second door closer for a moving leaf of the door, wherein the second door closer is designed according to the first aspect or one of its embodiments, wherein the door closer system further comprises a closing sequence control with a release unit, a transmission unit and the locking unit of the second door closer, wherein in the first installation position the first locking valve for a transmission of a release of the closing sequence control by the release unit cooperates with the transmission unit and the second locking valve is decoupled from the transmission unit.and wherein in the second installation position the second shut-off valve for a transmission of a triggering of the closing sequence control by the triggering unit cooperates with the transmission unit and the first shut-off valve is decoupled from the transmission unit.

[0025] The closing system according to the invention is designed for a double-leaf door. For this purpose, the closing system has a first and a second door closer, wherein the first door closer is designed for closing the inactive leaf and the second door closer is designed for closing the active leaf.

[0026] At least the second of the two door closers can be equipped with a slide rail in which a sliding block is slidably mounted. The sliding block is preferably rotatably connected to a sliding block end of a closer lever, the latter of which in turn can be coupled or connected to its opposite closer end to a closer shaft rotatably mounted in the closer housing, in particular in a rotationally fixed manner.

[0027] The trigger unit of the door closing sequence control is designed to detect an opening of the inactive leaf, particularly an opening exceeding a predetermined or preset opening angle. It is part of the closing sequence control system and is preferably designed to interact with the first door closer for this functionality. The triggering action generated by the trigger unit, which is itself initiated by the opening of the inactive leaf, is transmitted via a transmission unit to a locking unit. Since the closer housing of the second door closer is located on the active leaf of the door, it must be ensured that a triggering action of the closing sequence control by the trigger unit, which interacts with the first door closer, reaches the closer housing of the second door closer.The transmission and forwarding of a trigger of the closing sequence control to the closer housing of the door closer intended for the active leaf is preferably implemented mechanically by means of the transmission unit.

[0028] Both the transmission unit and the locking unit are elements of the closing sequence control. In the first installation position, the first locking valve of the locking unit can be controlled via the transmission unit by the release unit depending on the opening angle of the fixed leaf, whereas in the second installation position, the second locking valve of the locking unit can be controlled via the transmission unit by the release unit depending on the opening angle of the fixed leaf. Preferably, in the first installation position, the second locking valve is decoupled from the transmission unit and thus from being triggered by the release unit, and in the second installation position, the first locking valve is decoupled from the transmission unit and thus from being triggered by the release unit.

[0029] According to a third aspect, the problem is solved by providing a double-leaf door, in particular a fire and / or smoke protection door, with an active leaf and a fixed leaf, wherein the door has a closing system with a first door closer for the fixed leaf and a second door closer for the active leaf, wherein the closing system is designed according to the second aspect or one of its embodiments or the second door closer is designed according to the first aspect or one of its embodiments.

[0030] The task posed at the beginning is thus fully solved.

[0031] According to a first embodiment of the aspects or one of its embodiments, the door closer provided for the active leaf further comprises a regulating valve arranged in the flow channel arrangement for adjusting a closing characteristic, in particular a closing time, of the door closer, wherein the regulating valve is fluidly connected in the flow channel arrangement to the first locking valve and the second locking valve.

[0032] In other words, at least one regulating valve for adjusting at least one closing characteristic, in particular a closing time or closing speed, of the door closer is integrated into the flow channel arrangement. This arrangement allows hydraulic fluid to be displaced from the first hydraulic chamber to the second hydraulic chamber during a closing movement of the active leaf, whereby the flow of hydraulic fluid can preferably be controlled by means of the regulating valve integrated into the flow channel arrangement. In the flow channel arrangement of the door closer, the regulating valve is fluidly connected to both the first and the second locking valves, so that even when using two locking valves, the closing characteristic or the closing behavior of the door closer can be adjusted by means of a common regulating valve.

[0033] Providing a regulating valve in the flow channel arrangement, which is fluidly connected to both shut-off valves, contributes to operational reliability, particularly since further potential sources of error can be eliminated. Specifically, the adjustment effort related to the regulating valve can be reduced compared to an arrangement where the two shut-off valves are provided in separate, i.e., not fluidically connected, flow channel arrangements. In this case, each shut-off valve would require a regulating valve. Since regulating valves of this type are generally operated manually from outside the closer housing, each regulating valve would have to be individually adjusted, which is time-consuming, inconvenient, and increases the susceptibility of the door closer to failure, particularly due to incorrect adjustment of the regulating valves. The active-leaf door closer according to the invention takes these circumstances into account.Preferably, the regulating valve is designed as a closing time regulating valve for setting a closing time.

[0034] The function of a regulating valve is to adjust the closing behavior of the door closer, particularly over a defined or the entire range of motion. By varying the cross-sectional area through which the fluid flows, the movement speed can be influenced, thus taking into account or compensating for factors such as temperature, drafts, and / or changes in closing force.

[0035] However, the inclusion of a regulating valve, particularly a closing time regulating valve, in the flow channel arrangement where the two shut-off valves are located is not mandatory. If the regulating valve(s) are omitted, the closing behavior can be adjusted, for example, by a passive element, such as a rigid throttle, or by a channel section in the flow channel arrangement that is at least partially constricted. In this case, the door closer is designed for a single operating point with constant boundary conditions, specifically without any adjustment options for closing time and / or closing force.

[0036] According to a further embodiment of the aspects or one of its embodiments, the first shut-off valve and the regulating valve in the flow channel arrangement are fluidically connected in series to each other, wherein the second shut-off valve and the regulating valve in the flow channel arrangement are fluidically connected in series to each other, and wherein the first shut-off valve and the second shut-off valve in the flow channel arrangement are fluidically connected in parallel to each other.

[0037] The parallel connection of the shut-off valves and the series connection of the regulating valve with each shut-off valve ensures, in particular, that the door closer can be operated reliably in different installation positions. Specifically, the parallel connection of the shut-off valves allows them to operate independently of each other.

[0038] According to a further embodiment of the aspects or one of its embodiments, it is provided that, with regard to an overflow direction of a hydraulic fluid from the first hydraulic chamber to the second hydraulic chamber, the regulating valve is arranged upstream of the first shut-off valve and the second shut-off valve in the flow channel arrangement.

[0039] By positioning the regulating valve of the active-leaf door closer upstream of the locking valves, hydraulic fluid, particularly when the closing sequence control is not triggered, is first directed through the regulating valve before reaching the locking valves. According to the invention, it has been found that this arrangement of the locking valves and the regulating valve proves to be particularly advantageous for a compact design of the active-leaf door closer, especially with regard to arranging the locking valves on opposite sides of the closer housing and / or the closer piston.

[0040] According to a further embodiment of the aspects or one of its embodiments, a regulating valve outlet of the regulating valve in the flow channel arrangement is fluidly connected to a shut-off valve inlet of the first shut-off valve and a shut-off valve inlet of the second shut-off valve, wherein in particular a shut-off valve inlet of the first shut-off valve in the flow channel arrangement is fluidly connected to a shut-off valve inlet of the second shut-off valve.

[0041] This allows for effective implementation of the locking function and adjustment of the closing properties in the hydraulic system.

[0042] For example, if in the first installation position the first shut-off valve is open and the second shut-off valve is closed, hydraulic fluid from the first hydraulic chamber can be directed via the regulating valve to the valve inlet of the first shut-off valve and to the valve inlet of the second shut-off valve when the gate leaf closes. Since the second shut-off valve is closed in this example, hydraulic fluid cannot be directed into the second hydraulic chamber via the second shut-off valve, but only via the first shut-off valve.

[0043] For example, if in the second installation position the second shut-off valve is open and the first shut-off valve is closed, hydraulic fluid from the first hydraulic chamber can flow via the regulating valve to the valve inlet of the first shut-off valve and to the valve inlet of the second shut-off valve when the gate leaf closes. Since the first shut-off valve is closed in this example, hydraulic fluid cannot be directed into the second hydraulic chamber via the first shut-off valve, but only via the second shut-off valve.

[0044] For example, if both shut-off valves are closed, hydraulic fluid cannot be directed into the second hydraulic chamber via either the first shut-off valve or the second shut-off valve, thus blocking the closing movement of the closing piston and consequently the closing movement of the gate leaf.

[0045] The terms "regulating valve inlet," "regulating valve outlet," "shut-off valve inlet," and "shut-off valve outlet" preferably refer to a flow direction of the hydraulic fluid from the first hydraulic chamber to the second hydraulic chamber. Preferably, the shut-off valves and the regulating valve are each designed for unidirectional flow toward the second hydraulic chamber. However, bidirectional flow through the respective shut-off and regulating valves is also conceivable.

[0046] According to a further embodiment of the aspects or one of its embodiments, it is provided that, with regard to an overflow direction of the hydraulic fluid from the first hydraulic chamber to the second hydraulic chamber, the regulating valve is arranged downstream of the first shut-off valve and the second shut-off valve in the flow channel arrangement.

[0047] This allows for effective implementation of the locking function and adjustment of the closing characteristic in the hydraulic system. By positioning the control valve of the active-leaf door closer downstream of the locking valves, hydraulic fluid from the first hydraulic chamber can initially flow through one of the two locking valves, in particular through the locking valve that is operatively connected to the release unit in the respective installation position, provided it is open, before the hydraulic fluid reaches the control valve. This arrangement of the locking valves and the control valve is particularly suitable for mounting the locking valves on a common side of the closer housing.

[0048] According to a further embodiment of the aspects, a regulating valve inlet of the regulating valve in the flow channel arrangement is fluidly connected to a shut-off valve outlet of the first shut-off valve and a shut-off valve outlet of the second shut-off valve, wherein in particular a shut-off valve outlet of the first shut-off valve in the flow channel arrangement is fluidly connected to a shut-off valve outlet of the second shut-off valve.

[0049] This ensures, in particular, that both the locking function and the control of the closing action can be effectively implemented in the hydraulic system. Furthermore, the operation of the active-leaf door closer can be simplified.

[0050] For example, if in the first installation position the first check valve is open and the second check valve is closed, hydraulic fluid can be directed from the first hydraulic chamber via the first check valve to the regulating valve and then into the second hydraulic chamber when the gate leaf closes. Since the second check valve is closed in this example, no hydraulic fluid can flow through it. Similarly, if in the second installation position the second check valve is open and the first check valve is closed, hydraulic fluid can be directed from the first hydraulic chamber via the second check valve to the regulating valve and then into the second hydraulic chamber when the gate leaf closes. Since the first check valve is closed in this example, no hydraulic fluid can flow through it.For example, if both shut-off valves are closed, hydraulic fluid from the first hydraulic chamber is blocked from entering the second hydraulic chamber via the regulating valve.

[0051] According to a further embodiment of the aspects or one of its embodiments, in the first installation position of the door closer the second shut-off valve is permanently closed, so that a hydraulic flow through the second shut-off valve into the second hydraulic chamber is blocked, and in the second installation position of the door closer the first shut-off valve is permanently closed, so that a hydraulic flow through the first shut-off valve into the second hydraulic chamber is blocked.

[0052] By keeping either the first or the second shut-off valve permanently closed in the respective installation position of the door closer intended for the active leaf, targeted control of the hydraulic flow is enabled. Such an arrangement is particularly suitable for a configuration of the door closer intended for the active leaf in which the two shut-off valves are fluidically connected or arranged in parallel to each other in the flow channel arrangement. If, in the first installation position, the second shut-off valve, which is decoupled from the release unit, is permanently closed, hydraulic fluid can preferably only be directed into the second hydraulic chamber via the first shut-off valve, depending on the actuation state of the first shut-off valve.If, in the second installation position, the first shut-off valve, which is decoupled from the triggering unit, is permanently closed, hydraulic fluid can preferably only be directed into the second hydraulic chamber via the second shut-off valve, depending on the actuation state of the second shut-off valve.

[0053] Preferably, the first and second shut-off valves each have a normally closed valve characteristic (NC valve characteristic). In this context, an NC valve characteristic means that an unaffected shut-off valve, not operatively connected to the release unit and / or the transmission unit, remains independently in its system-safe closed position. This ensures that in the first installation position, the decoupled or unaffected second shut-off valve closes independently, and in the second installation position, the decoupled or unaffected first shut-off valve closes independently.

[0054] According to a further embodiment of the aspects or one of its embodiments, the flow channel arrangement has one or more channel sections which are introduced into the closing housing as deep-hole bores.

[0055] In this way, a flow path for the hydraulic fluid can be provided in a space-saving and simple manner within the closer housing of the door closer intended for the active leaf. The deep-hole drillings can, for example, be incorporated into the closer housing from one or more sides.

[0056] According to a further embodiment of the aspects or one of its embodiments, the first shut-off valve and the second shut-off valve are each mechanically controllable.

[0057] According to a further embodiment of the aspects or one of its embodiments, the shut-off valves are arranged on a lateral surface of the closing valve housing.

[0058] In this context, a lateral surface is understood to be that surface of the closer housing which extends between opposite end faces of the closer housing.

[0059] According to a further embodiment of the aspects or one of its embodiments, the first shut-off valve and the second shut-off valve each have a valve body with a valve axis, wherein the valve axes of the shut-off valves are oriented parallel to each other.

[0060] Parallel alignment of the valve axes of the shut-off valves allows for simple control of the shut-off valves. Furthermore, the manufacturing of the closing valve housing can be simplified.

[0061] Alternatively or additionally, at least one of the valve axes of the shut-off valves, preferably both valve axes of the shut-off valves, can be oriented parallel to a longitudinal axis of the closing shaft. This design is particularly suitable for an arrangement of the shut-off valves close to the closing shaft in and / or on the closing housing.

[0062] Alternatively or additionally, at least one of the valve axes of the shut-off valves, preferably both valve axes of the shut-off valves, can be oriented parallel to a longitudinal axis of the closing valve housing. This design is particularly suitable for an end-face arrangement of the shut-off valves in and / or on the closing valve housing.

[0063] Alternatively or additionally, it can be provided that at least one of the valve axes of the shut-off valves, preferably both valve axes of the shut-off valves, are aligned parallel to a valve axis of the regulating valve.

[0064] According to a further embodiment of the aspects or one of its embodiments, the shut-off valves are spaced apart from each other in a direction oriented parallel to the longitudinal axis of the closing shaft and / or are arranged on opposite sides of the closing piston.

[0065] This arrangement contributes to a compact design of the door closer housing. Furthermore, this arrangement promotes reliable operation of the door closer in different installation positions. The longitudinal axis of the closer shaft is preferably aligned parallel to, or corresponds to, a rotational axis of the closer shaft, which is rotatably mounted in the closer housing. When the door closer is installed, the longitudinal axis of the closer shaft is preferably vertically oriented, i.e., aligned with the Earth's gravitational field.

[0066] According to a further embodiment of the aspects or one of its embodiments, the door closer further comprises a closing element closing the first hydraulic chamber to the outside with a preferably cylindrical projection which engages fluid-sealingly in the first hydraulic chamber, wherein the flow channel arrangement is formed at least sectionally by a groove formed on the outer circumference of the projection and an inner wall of the closer housing.

[0067] This design contributes to efficient use of the available installation space and a compact construction of the closing valve housing. The section of the flow channel arrangement formed by the groove and the inner wall of the closing valve housing proves particularly advantageous when the shut-off valves are arranged in and / or on the closing valve housing on both sides of the closing piston, as it enables efficient and space-saving hydraulic redirection between both sides. The closing element, in particular the projection of the closing element, can, for example, be positively engaged in an end of the first hydraulic chamber facing away from the closing piston. The closing element can, for example, be a closing cover of the closing valve housing.

[0068] Alternatively or additionally, the closing valve housing, in particular a wall section of the closing valve housing, may be provided with at least one transverse bore as part of the flow channel arrangement, wherein the transverse bore connects the shut-off valves to each other via fluid communication. The at least one transverse bore is preferably oriented transversely to a longitudinal direction parallel to the longitudinal axis of the closing valve housing. Alternatively or additionally, the flow channel arrangement may extend at least partially outside the closing valve housing in order to connect the shut-off valves to each other via fluid communication.

[0069] According to a further embodiment of the aspects or one of its embodiments, the door closer intended for the active leaf further comprises at least one locking element for selectively controlling, in particular actuating, the first locking valve in the first installation position or the second locking valve in the second installation position in order to selectively block or release a closing movement of the active leaf.

[0070] At least one locking element serves to transmit and forward a trigger signal from the triggering unit and can, for example, be part of the transmission unit of the closing sequence control. This facilitates a reliable and purely mechanical connection between the triggering unit and the respective locking valve, depending on the installation position.

[0071] According to a further embodiment of the aspects or one of its embodiments, the door closer intended for the active leaf further comprises a sleeve element for transmitting a release by the release unit, which is slidably mounted on a closing end of the closing lever parallel to the longitudinal axis of the closing shaft, wherein the sleeve element can be coupled to the at least one locking element.

[0072] The sleeve element serves to transmit and forward a trigger signal from the triggering unit and can, for example, be part of the transmission unit of the closing sequence control. Due to the sliding mounting of the sleeve element and its coupling capability with the at least one locking element, a deflection of the sleeve element, initiated by the triggering of the closing sequence control by the triggering unit, preferably leads to a displacement of the at least one locking element and thus to the actuation of the respective locking valve.

[0073] According to a further embodiment of the aspects or one of its embodiments, a first locking element of the at least one locking element is configured to actuate the first locking valve in the first installation position, wherein a second locking element of the at least one locking element is configured to actuate the second locking valve in the second installation position.

[0074] In other words, the door closer intended for the active leaf has two locking elements, with each locking valve assigned one of the two locking elements. This design promotes reliable operation of the door closer in various installation positions.

[0075] Preferably, in the first installation position, the first locking element is coupled to the sleeve element, and in the second installation position, the second locking element is coupled to the sleeve element. This coupling of the first locking element to the sleeve element in the first installation position and of the second locking element to the sleeve element in the second installation position ensures that the appropriate locking valve can always be activated to guarantee the desired function of the door closer.

[0076] According to a further embodiment of the aspects or one of its embodiments, the first locking element and the second locking element are each designed as a locking lever rotatably mounted on and / or in the closer housing of the door closer provided for the active leaf.

[0077] The locking levers allow the locking valves to be actuated in a particularly simple and safe manner. Furthermore, a locking element designed as a locking lever facilitates a flexible arrangement of the locking valves in and / or on the closer housing. Due to the sliding mounting of the sleeve element, a deflection of the sleeve element, initiated by the triggering of the closing sequence control by the release unit, preferably leads to a tilting of the locking lever coupled to the sleeve element in the respective installation position, thus actuating the locking valve connected to it. Preferably, each locking lever is designed as a two-armed, in particular L-shaped, lever with two legs and is mounted on and / or in the closer housing of the door closer intended for the active leaf at a connection point between the two legs.According to the invention, it has been recognized that a locking element designed as a locking lever is particularly suitable when the valve axis of the respective locking valve is horizontally aligned.

[0078] According to a further embodiment of the aspects or one of its embodiments, the locking element is designed as a driver.

[0079] The actuator also allows the shut-off valves to be actuated in a simple and reliable manner. If a sleeve element is provided, the actuator can be connected to the sleeve element, in particular by being clipped onto it. When the sleeve element is deflected, initiated by the triggering of the closing sequence control by the release unit, the actuator is then driven along and actuates the shut-off valve. According to the invention, it has been recognized that an actuator is particularly advantageous when the valve axis of the respective shut-off valve is aligned parallel to the longitudinal axis of the closing shaft. Preferably, the actuator is coupled to the sleeve element in both installation positions.

[0080] According to a further embodiment of the design, the door closer intended for the active leaf also has a transfer element associated with the closing sequence control for transmitting a release signal from the release unit along the closer lever, which preferably extends between a sliding block end and a closing end of the closer lever opposite the sliding block end of the door closer intended for the active leaf. For the purposes of the invention, the terms sliding block end and closing end are preferably understood as areas that include not only the respective actual physical end of the closer lever but also its immediate surroundings.

[0081] The transfer element can, for example, be designed as a two-armed transfer lever that can be pivotably mounted in and / or on a lever receptacle of the closing lever between an inactive and an active position. Preferably, the transfer element is operatively connected to the release unit on one side and to the locking unit on the other. For example, the sleeve element can be coupled to the transfer element so that the transfer lever can be moved into its active position to transmit a release signal from the release unit, thereby displacing the sleeve element. By displacing the sleeve element, the respective locking valve can be actuated, in particular via the respective locking element.

[0082] According to a further embodiment of the aspects or one of its embodiments, the shut-off valves each have a shut-off valve housing with at least two openings through which hydraulic fluid can flow through the respective shut-off valve, an actuator integrated into the shut-off valve housing with a sealing element that can form a sealing seat with the shut-off valve housing around a first opening of the at least two openings, and with a first magnetic element, and a release mechanism which is arranged outside the shut-off valve housing and hermetically separated from the actuator, has a second magnetic element and can assume at least two states, wherein at least one of the magnetic elements has a permanent magnet and the other magnetic element has a permanent magnet or a ferromagnet.wherein in a first state of the trigger corresponding to the closed state of the respective shut-off valve, no magnetic force or a first magnetic force acts between the magnetic elements and the actuator is automatically in a first position in which it blocks the first opening and forms a sealing seat with the housing around the first opening, wherein in a second state of the trigger corresponding to the open state of the respective shut-off valve, a second magnetic force acts between the magnetic elements, by which the actuator is brought into a second position in which it is lifted from the sealing seat and opens the first opening.

[0083] The trigger can be designed in such a way that it can switch back and forth between the first and second states by a displacement in a plane transverse to the longitudinal axis of the respective shut-off valve and / or by a displacement in the direction of the longitudinal axis and / or by rotation about the axis perpendicular to the longitudinal axis.

[0084] The displacement in the plane transverse to the longitudinal axis of the respective shut-off valve and / or the displacement in the direction of the longitudinal axis and / or the rotation about the axis perpendicular to the longitudinal axis can be caused, in particular, by the at least one shut-off element. The displacement of the respective trigger transverse to the longitudinal axis of the respective shut-off valve and / or the displacement in the direction of the longitudinal axis of the respective shut-off valve can, for example, be caused by the actuator. The rotation of the respective shut-off valve about the axis perpendicular to the longitudinal axis can, for example, be caused by the respective shut-off lever.

[0085] Preferably, at least one locking element is operatively connected to the trigger of the first shut-off valve in the first installation position in order to selectively bring the trigger of the first shut-off valve into the first or second state, and in the second installation position is operatively connected to the trigger of the second shut-off valve in order to selectively bring the trigger of the second shut-off valve into the first or second state.

[0086] Optionally, it can be provided that when the trigger is moved from the second state to the first state, it automatically returns to the first position, even if no magnetic force acts between the magnetic elements. This ensures that the shut-off valves reliably assume a shut-off position in a neutral, unaffected state.

[0087] According to a further embodiment of the aspects or one of its embodiments, it is provided that in the first installation position the closing lever is coupled to a first end of the closing shaft, and that in the second installation position the closing lever is coupled to a second end of the closing shaft opposite the first end.

[0088] Preferably, the closing shaft is exposed on opposite sides of the closing mechanism housing. For example, it can be provided that the closing shaft protrudes from the closing mechanism housing on opposite sides.

[0089] According to a further embodiment of the aspects or one of its embodiments, the door closer intended for the active leaf further comprises at least one end-stop valve arranged in or on its closer housing for setting an end-stop action.

[0090] The check valve serves to provide a closing action function, particularly at small opening angles of the door leaf. A check valve is preferably a hydraulic valve that overcomes the mechanical resistance of seals and / or a latch by increasing the closing speed of the door leaf shortly before it reaches the closed position, i.e., at small opening angles.

[0091] This can be achieved, in particular, by ensuring that at least one activation point of the first hydraulic chamber, provided for example by a connection area, especially a connection bore, is active at certain closing piston positions. This means that a corresponding flow channel arrangement is fluidically connected to the second hydraulic chamber at this activation point and is not active in other closing piston positions, for example by a fluid-tight covering of the connection area by the piston. By appropriately selecting the position of the activation point, for example, an increase in closing speed at small door opening angles can be provided to enable a latching function. The position of the activation point determines the critical angle at which the latching function engages.

[0092] The check valve can be located in the same flow channel arrangement as the first and second check valves. Alternatively, the check valve can be located in a separate flow channel arrangement that connects the first and second hydraulic chambers via fluid communication. This ensures that the check valve is independent of the check valves.

[0093] According to a further embodiment, a single regulating valve for setting a closing time is arranged in the flow channel arrangement of the door closer intended for the active leaf, in which the locking valves are arranged.

[0094] In other words, the flow channel arrangement of the door closer according to the invention contains only one closing time valve. This further reduces the adjustment effort required for the door closer intended for the active leaf.

[0095] According to a further embodiment of the second or third aspect or one of its embodiments, the transmission unit has at least one rail section and a closer section coupled thereto, wherein the rail section interacts with the release unit and is at least partially arranged in the slide rail, and the closer section optionally interacts with the first locking valve in the first installation position or with the second locking valve in the second installation position, and is arranged with at least a partial section from the end of the slide block to the end of the closer along the closer lever of the second door closer.

[0096] The locking unit of the closing sequence control is preferably arranged downstream of the closing section, with the closing section interacting with the locking unit. In this way, a trigger of the closing sequence control, generated by the trigger unit, can be transmitted via the entire transmission unit, encompassing the rail section and the closing section, to the locking unit, thereby activating a lockout of the closing process of the leaf.

[0097] Preferably, the closer section includes a transfer element. The transfer element preferably extends between opposite ends of the closer lever, e.g., between a sliding block end and a closing end of the closer lever. The transfer element can, for example, be designed as a two-armed transfer lever, wherein the transfer lever can be pivotably mounted in and / or on a lever receptacle of the closer lever between an inactive position and an active position. Preferably, the sleeve element is coupled to the transfer element so that the transfer lever can be moved into its active position to transmit a release signal from the release unit, thereby displacing the sleeve element.

[0098] Furthermore, the rail section may include a transmission device for transmitting a release signal from the release unit in a direction parallel to the guide rail, and an activation device coupled to the transmission device for transmitting the release signal in a direction transverse to the guide rail. The transmission device may, for example, comprise a push rod and / or a cable pull. The activation device may include a coupling element for coupling with the closing section.

[0099] The rail section of the transmission unit essentially has two tasks: firstly, transmitting the trigger signal of the closing sequence control along the guide rail, and secondly, forwarding the trigger signal to the closing element section. By dividing the rail section into the transmission unit and the activation unit, both tasks can be performed by separate component groups, each specifically tailored to its respective function.

[0100] Overall, the transmission unit, which is formed as a combination of rail section and closer section, establishes a secure and purely mechanical functional connection between the release unit, i.e. the first door closer on the fixed leaf, and the locking unit on and / or in the closer unit of the second door closer on the active leaf.

[0101] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0102] Embodiments of the invention are illustrated in the drawing and explained in more detail in the following description. Elements with the same function and mode of operation are identified by the same reference numerals in the figures. The figures show: Fig. 1 an embodiment of a double-leaf door, Fig. 2 a schematic representation of an exemplary first embodiment of a door closer, Fig. 3 a schematic representation of an exemplary second embodiment of a door closer, Fig. 4 an exemplary embodiment of the door closer made of Fig. 2 In a first perspective, Fig. 5, the door closer is made of Fig. 4 In a second perspective, Fig. 6 shows an exemplary embodiment of the door closer. Fig. 3 in a first perspective, and Fig. 7 the door closer from Fig. 6 from a second perspective.

[0103] Fig. 1 Figure 3 shows a double-leaf door 300 with a fixed leaf 310 and an active leaf 320. The door 300 is also equipped with a door closer system 200. A follower flap 202 ensures that when the fixed leaf 310 is opened, the active leaf 320 is also sufficiently pushed open.

[0104] The door closer system 200 has, in particular, a first door closer 204 for the inactive leaf 310 and a second door closer 10 for the active leaf 320. As shown, the entire door closer system 200 can, for example, be arranged in a hinge-side mounting on the door 300.

[0105] In particular, the second door closer 10 is equipped with a slide rail 12 in which a sliding block 14 is slidably mounted along its sliding path 16. As shown, a single, continuous slide rail 12 can be provided for both door closers 10, 204. Configurations with two separate slide rails 12 for both door closers 10, 204 are also conceivable, for example, to utilize the freed-up installation space for additional components, such as a smoke and / or fire detector. The sliding block 14 is rotatably connected to a sliding block end 18 of a closer lever 22 of the second door closer 10. A closer end 23 of the closer lever 22, positioned opposite the sliding block end 18, is connected to a closer housing 24 of the second door closer 10. The closer housing 24 is located on the door leaf of the active leaf 300.

[0106] Furthermore, the door 300 and / or the door closer system 200 is equipped with a closing sequence control 206. This closing sequence control 206 ensures that when the fixed leaf 310 is open, the closing process of the active leaf 320 is blocked and thus stopped, so that a corresponding closing process of the fixed leaf 310 is not obstructed and can be completed. For this functionality, the closing sequence control 206 has a release unit 208 coupled to the first door closer 204, a transmission unit 210, and a locking unit 26.The locking unit 26 is designed for the actual locking of the second door closer 10, with the transmission unit 210 transmitting a triggering of the closing sequence control 206 by the release unit 208, in particular triggered by an opening of the fixed leaf 310 beyond a release angle, to the locking unit 26, in particular regardless of where the sliding block 14 is located along its sliding path 16 in the guide rail 12. The locking unit 26 is part of the second door closer 10.

[0107] Fig. 2 shows a first embodiment of the door closer 10 according to the invention. As in Fig. 2 As shown, the door closer 10 has a closing piston 32, which is slidably guided in the closer housing 24 and biased in the closing direction 30 by a mechanical energy storage device 28. This piston divides a hydraulic volume 33 within the closer housing 24 into a first hydraulic chamber 34 and at least one second hydraulic chamber 36. Preferably, the closing piston 32 is guided longitudinally displaceably in a preferably cylindrical bore of the closer housing 24. In the illustration shown, the mechanical energy storage device 28 is implemented as an example closing spring. Furthermore, the door closer 10 has a closing shaft 38 rotatably mounted in the closer housing 24. The closing shaft 38 can be coupled to the closing lever 22 of the door closer 10 in a rotationally fixed manner. Furthermore, the closing shaft 38 interacts with the closing piston 32, so that a displacement of the closing piston 32 causes a rotation of the closing shaft 38, and vice versa.For this purpose, the closing piston 32 can, for example, have a toothed section (not shown) which preferably meshes with a pinion (not shown) that is rotationally fixed to the closing shaft 38. Alternatively, the closing shaft can, for example, be designed as a camshaft. To insert the closing piston 32 into the closing housing 24, the closing housing 24 can have a locking element 40 on its end face.

[0108] When the closing piston 32 moves to the right in the drawing, corresponding to an opening movement of the door leaf 320, the closing spring 28 is compressed. A relaxation of the closing spring 28 causes the closing piston 32 to move to the left in the drawing (i.e., in the closing direction 30), corresponding to a closing movement of the door leaf 320.

[0109] Furthermore, the door closer 10 has a flow channel arrangement 42, preferably formed in the closer housing 24, which fluidly connects the first hydraulic chamber 34 and the second hydraulic chamber 36. For illustrative purposes, the flow channel arrangement 42 is shown extending from the closer housing 24 in the drawing. A regulating valve 44 for setting a closing characteristic, in particular a closing time, of the door closer 10 is arranged in the flow channel arrangement 42. A first shut-off valve 46 of the locking unit 26 and a second shut-off valve 48 of the locking unit 26 are also arranged in the flow channel arrangement 42. The shut-off valves 46 and 48 are designed to block hydraulic flow from the first hydraulic chamber 34 to the second hydraulic chamber 36 and thus prevent the closing movement of the closer piston 32 and consequently of the active leaf 320. The shut-off valves 46 and 48 can be controlled independently of each other.

[0110] In the first embodiment, the shut-off valves 46 and 48 are connected fluidically in parallel to each other. Furthermore, the first shut-off valve 46 and the second shut-off valve 48 are each connected fluidically in series with the regulating valve 44. With respect to the flow direction of the hydraulic fluid from the first hydraulic chamber 34 to the second hydraulic chamber 36, the shut-off valves 46 and 48 are, by way of example, arranged downstream of the regulating valve 44 in the flow channel arrangement 42.

[0111] The flow channel arrangement 42 of the first embodiment has, by way of example, several channel sections 50, 52, 54, 56, 58, 60. A regulating valve inlet of the regulating valve 44 is fluid-communicating with the first hydraulic chamber 34 via a first channel section 50. A regulating valve outlet of the regulating valve 44 is fluid-communicating with check valve inlets of the check valves 46 and 48 via a second channel section 52, which transitions in a first branch 62 into a third channel section 54 and a fourth channel section 56. In particular, the regulating valve outlet of the regulating valve 44 is fluidly connected to the shut-off valve inlet of the first shut-off valve 46 via the second channel section 52 and the third channel section 54, and fluidly connected to the shut-off valve inlet of the second shut-off valve 48 via the second channel section 52 and the fourth channel section 56.A shut-off valve outlet of the first shut-off valve 46 can be fluid-communicating with the second hydraulic chamber 36 via a fifth channel section 58. A shut-off valve outlet of the second shut-off valve 48 can be fluid-communicating with the second hydraulic chamber 36 via a sixth channel section 60.

[0112] Preferably, the channel sections 50, 52, 54 and 58 form a first flow path through which hydraulic fluid can be directed from the first hydraulic chamber 34 into the second hydraulic chamber 36, and the channel sections 50, 52, 56 and 60 form a second flow path through which hydraulic fluid can be directed from the first hydraulic chamber 34 into the second hydraulic chamber 36, in particular independently of the first flow path.

[0113] If the first shut-off valve 46 is open and the second shut-off valve 48 is closed, hydraulic fluid can flow from the first hydraulic chamber 34 into the second hydraulic chamber 36 via the regulating valve 44 and the first shut-off valve 46 during a closing operation of the gate 320, particularly through the first flow path formed by the channel sections 50, 52, 54 and 58. If the first shut-off valve 46 is closed and the second shut-off valve 48 is open, hydraulic fluid can flow from the first hydraulic chamber 34 into the second hydraulic chamber 36 via the regulating valve 44 and the second shut-off valve 48 during a closing operation of the gate 320, particularly through the second flow path formed by the channel sections 50, 52, 56 and 60.

[0114] If both shut-off valves 46, 48 are closed, a hydraulic flow through the flow channel arrangement 42 is prevented, thereby blocking the closing movement of the closing piston 32 and thus of the wing 320.

[0115] Fig. 3 Figure 10 shows a second embodiment of the door closer according to the invention. Identical elements are provided with the same reference numerals and are not explained in more detail.

[0116] The in Fig. 3 the second embodiment of the door closer 10 shown and the one in Fig. 2 The first embodiment of the door closer 10 shown differs in particular with regard to the relative arrangement of the first locking valve 46, the second locking valve 48 and the regulating valve 44 in the flow channel arrangement 42.

[0117] In the second embodiment, the shut-off valves 46 and 48 are connected fluidically in parallel to each other. Furthermore, the first shut-off valve 46 and the second shut-off valve 48 are each connected fluidically in series with the regulating valve 44. With respect to the flow direction of the hydraulic fluid from the first hydraulic chamber 34 to the second hydraulic chamber 36, the regulating valve 44 is located downstream of the shut-off valves 46 and 48 in the flow channel arrangement 42.

[0118] The flow channel arrangement 42 of the second embodiment has, by way of example, several channel sections 64, 66, 68, 70, 72, 74. A check valve inlet of the first check valve 46 can be fluid-communicating with the first hydraulic chamber 34 via a first channel section 64. A check valve inlet of the second check valve 48 can be fluid-communicating with the first hydraulic chamber 34 via a second channel section 66. Check valve outlets of the check valves 46, 48 are connected via a third channel section 68 and a fourth channel section 70, which transition into a fifth channel section 72 in a second branch 76, to a control valve inlet of the control valve 44.In particular, the shut-off valve outlet of the first shut-off valve 46 is fluidly connected to the regulating valve inlet of the regulating valve 44 via the third channel section 68 and the fifth channel section 72, and the shut-off valve outlet of the second shut-off valve 48 is fluidly connected to the regulating valve inlet of the regulating valve 44 via the fourth channel section 70 and the fifth channel section 72. A shut-off valve outlet of the regulating valve 44 can be fluidly connected to the second hydraulic chamber 36 via a sixth channel section 74.

[0119] If the first shut-off valve 46 is open and the second shut-off valve 48 is closed, hydraulic fluid can flow from the first hydraulic chamber 34 into the second hydraulic chamber 36 via the first shut-off valve 46 and the regulating valve 44 during a closing operation of the valve leaf 320, in particular through the first flow path formed by the channel sections 64, 68, 72 and 74. If the first shut-off valve 46 is closed and the second shut-off valve 48 is open, hydraulic fluid can flow from the first hydraulic chamber 34 into the second hydraulic chamber 36 via the second shut-off valve 48 and the regulating valve 44 during a closing operation of the valve leaf 320, in particular through the second flow path formed by the channel sections 66, 70, 72 and 74.

[0120] If both shut-off valves 46, 48 are closed, a hydraulic flow through the flow channel arrangement 42 is prevented, thereby blocking the closing movement of the closing piston 32 and thus of the wing 320.

[0121] The door closer 10 according to the first and second embodiments can be mounted in at least two installation positions. Preferably, in a first of the at least two installation positions of the door closer 10, the second locking valve 48 is decoupled from a triggering of the closing sequence control 206 by the release unit 208 and is preferably permanently closed, and the first locking valve 46 is operatively connected to the release unit 208 and / or can be controlled via it. Preferably, in a second of the at least two installation positions of the door closer 10, the first locking valve 46 is decoupled from a triggering of the closing sequence control 206 by the release unit 208 and is preferably permanently closed, and the second locking valve 48 is operatively connected to the release unit 208 and / or can be controlled via it.

[0122] Fig. 4 and 5Figure 1 shows another exemplary embodiment of the door closer 10 with a transparently depicted closer housing 24 from different perspectives. Identical elements are designated with the same reference numerals and are not explained in detail.

[0123] The one in the Fig. 4 and 5 The door closer 10 shown is based on the first embodiment of Fig. 2 . In the Fig. 4 The door closer 10 is shown in an exemplary first installation position in which a first end 78 of the closer shaft 38 is coupled to the closer lever 22, in particular to the closing end 23 of the closer lever 22. A further coupling option between the closer lever 22 and the closer shaft 38 exists at a second end 82 of the closer shaft 38, opposite the first end 78 along a longitudinal axis 80 of the closer shaft 38. In a second installation position of the door closer (not shown), it may be provided, for example, that the closing end 23 of the closer lever 22 is coupled to the second end 82.

[0124] As in the Fig. 4 As shown, the door closer 10 has a locking element 84 for selectively controlling and / or actuating the first locking valve 46 in the first installation position or the second locking valve 48 in the second installation position. The locking element 84 is designed as a driver by way of example. The locking element 84, designed as a driver, is connected to a sleeve element 88, which is slidably mounted at the closer end 23 parallel to the longitudinal axis 80 of the closer shaft 38, and in particular is clipped onto the sleeve element 88. The sleeve element 88 can be part of the transmission unit 210 of the closing sequence control 206, so that a deflection of the sleeve element 88, initiated by a triggering of the closing sequence control 206 by the triggering unit 204, carries the locking element 84 along and actuates the first locking valve 46 in the first installation position.The second shut-off valve 48, which is not operatively connected to the shut-off element 84 in the first installation position, is preferably permanently closed in the first installation position. In the second installation position, the shut-off element 84 is operatively connected to the second shut-off valve 48 in order to actuate it. The first shut-off valve 46, which is not operatively connected to the shut-off element 84 in the second installation position, is preferably permanently closed in the second installation position. For safety reasons, the second shut-off valve 48 may be sealed in the first installation position. Similarly, the first shut-off valve 48 may be sealed in the second installation position.

[0125] Furthermore, the illustrated door closer 10 has a transfer element 90 associated with the closing sequence control 206 for transmitting a release signal from the release unit 208 along the closer lever 22, which preferably extends between the sliding block end 18 and the closing end 23 of the closer lever 22. The transfer element 90 is preferably part of the transmission unit 210. The transfer element 90 can, for example, be designed as a two-armed transfer lever, which can be pivotably mounted in and / or on a lever receptacle (not shown) of the closer lever 22 between an inactive position and an active position. For example, the sleeve element can be coupled to the transfer element 90 so that the transfer lever can be moved into its active position to transmit a release signal from the release unit 208, thereby displacing the sleeve element 88.By shifting the sleeve element 88, the respective shut-off valve 46, 48 can be actuated via the shut-off element 84 designed as a driver.

[0126] The shut-off valves 46, 48 are arranged, by way of example, in a vertical direction H oriented parallel to the longitudinal axis 80 of the closing shaft 38 on opposite sides of the closing piston 32 and the closing housing 24. The valve axes of the shut-off valves 46, 48 (not shown) are oriented essentially parallel to each other and parallel to the longitudinal axis 80 of the closing shaft 38. A valve axis of the regulating valve 44 (not shown) is, by way of example, oriented parallel to a lateral direction B. The lateral direction B is preferably oriented perpendicular to the vertical direction H and to a longitudinal direction L oriented parallel to the longitudinal axis 92 of the closing housing 24. The shut-off valves 46, 48 are arranged close to the axis of the closing shaft 38 in and / or on the closing housing 24 with respect to the longitudinal axis 80 of the closing shaft 38.

[0127] The closure element 40 has a projection 94, in particular a cylindrical one, which engages fluid-sealingly in the first hydraulic chamber 34. A groove 96 is formed on the outer circumference of the projection 94. The flow channel arrangement 42 is formed, at least partially, by the groove 96 formed on the outer circumference of the projection 34 and an inner wall of the closing valve housing 24. In particular, the fourth channel section 56 of the flow channel arrangement 42, which extends between the first branch 62 and the shut-off valve inlet of the second shut-off valve 48, is formed, at least partially, by the groove 96 and the inner wall of the closing valve housing 24. In this way, a space-saving transverse connection can be provided, in particular, between subsections of the fourth channel section 56 that are preferably oriented parallel to the longitudinal axis 92 of the closing valve housing 24 and spaced apart from each other in the vertical direction H.

[0128] Fig. 6 and 7 Figure 1 shows another exemplary embodiment of the door closer 10 with a transparently depicted closer housing 24 from different perspectives. Identical elements are designated with the same reference numerals and are not explained in detail.

[0129] The one in the Fig. 6 and 7 The door closer 10 shown is based on the second embodiment of Fig. 3 .

[0130] As in the Fig. 6 and 7 As shown, the door closer 10 has a first locking element 98 for selectively controlling and / or actuating the first locking valve 46 in the first installation position. The first locking element 98 is designed, by way of example, as a locking lever that is rotatably mounted on and / or in the closer housing 24. In the illustration shown, the first locking element 98 is designed as an L-shaped lever with two legs and is located in the area of ​​a connection point 100 (see figure). Fig. 7 ) of the two legs are mounted on and / or in the closer housing 24. The first locking element 98 is in the first installation position with the sleeve element 88, which is hidden for illustrative purposes (see Fig. 4 ) can be coupled or coupled. Due to the movable bearing of the sleeve element 88, a deflection of the sleeve element 88, which is initiated by the triggering of the closing sequence control 206 by the triggering unit 208, preferably leads to a tilting of the first locking element 98, which is coupled to the sleeve element 88 in the first installation position and is designed as a locking lever, and thus to an actuation of the first locking valve 46, which is in operative connection with it in the first installation position.

[0131] Preferably, the door closer 10 further comprises a second locking element (not shown), which is designed in accordance with the first locking element 98. The second locking element can be coupled to, or is coupled to, the sleeve element 88 in the second installation position. Due to the sliding mounting of the sleeve element 88, a deflection of the sleeve element 88, which is initiated by the triggering of the closing sequence control 206 by the release unit 208, preferably leads to a tilting of the second locking element, designed as a locking lever, which is coupled to the sleeve element 88 in the second installation position, and thus to an actuation of the second locking valve 48, which is operatively connected to it in the second installation position.

[0132] The first locking element 98 and the second locking element are spaced apart from each other in the vertical direction H within and / or on the closer housing 24. The locking elements of this exemplary embodiment are preferably rotatably mounted on a common side of the closer housing 24, which is preferably aligned parallel to a plane defined by the longitudinal axes 80 and 92 and / or by the vertical direction H and the longitudinal direction L.

[0133] Also in the Fig. 6 and 7In the illustrations shown, the shut-off valves 46, 48 are arranged, by way of example, in the vertical direction H, which is oriented parallel to the longitudinal axis 80 of the closing shaft 38, on opposite sides of the closing piston 32 and the closing housing 24. The valve axes of the shut-off valves 46, 48 are oriented essentially parallel to each other and parallel to the lateral direction B. Furthermore, the valve axes of the shut-off valves 46, 48 are, by way of example, oriented parallel to the valve axis of the regulating valve 44.

[0134] In this embodiment as well, the flow channel arrangement 42 is formed at least partially by the groove 96 formed on the outer circumference of the projection 94 and the inner wall of the closing valve housing 24. In particular, the fourth channel section 70 of the flow channel arrangement 42, which extends between the shut-off valve outlet of the second shut-off valve 48 and the second branch 72, is formed at least partially by the groove 96 and the inner wall of the closing valve housing 24. In this way, a space-saving transverse connection can be provided between partial sections of the fourth channel section 70, which are preferably oriented parallel to the longitudinal axis 92 of the closing valve housing 24 and spaced apart from each other in the vertical direction H.

[0135] The door closer 10 according to the one in the Fig. 6 and 7The illustrated embodiment further comprises a check valve 102 for setting a final check. The check valve 102 is arranged downstream of the regulating valve 44 in the flow channel arrangement 42 with respect to an overflow direction of the hydraulic fluid from the first hydraulic chamber 34 to the second hydraulic chamber 36. Reference symbol list:

[0136] 10 - Door closer (second door closer) 12 - Slide rail 14 - Slide block 16 - Slide path 18 - Slide block end 22 - Closer lever 23 - Closer end 24 - Closer housing 26 - Locking unit 28 - Mechanical energy storage (closing spring) 30 - Closing direction 32 - Closer piston 33 - Hydraulic volume 34 - First hydraulic chamber 36 - Second hydraulic chamber 38 - Closer shaft 40 - Locking element 42 - Flow channel arrangement 44 - Control valve 46 - First shut-off valve 48 - Second shut-off valve 50 - First channel section 52 - Second channel section 54 - Third channel section 56 - Fourth channel section 58 - Fifth channel section 60 - Sixth channel section 62 - First branch 64 - First Channel section 66 - Second channel section 68 - Third channel section 70 - Fourth channel section 72 - Fifth channel section 74 - Sixth channel section 76 - Second branch 78 - First end 80 - Longitudinal axis of the closing shaft 82 - Second end 84 - Locking element (driver) 88 - Sleeve element 90 - Transfer element 92 - Longitudinal axis of theCloser housing 94 - Attachment 96 - Groove 98 - First locking element (locking lever) 100 - Connection point 102 - Check valve 200 - Closer system 202 - Actuator flap 204 - First door closer 206 - Closing sequence control 208 - Release unit 210 - Transmission unit 300 - Double-leaf door 310 - Fixed leaf 320 - Active leaf

Claims

1. Door closer (10) for an active leaf (320) of a double-leaf door (300) equipped with a closing sequence control (206), in particular a fire and / or smoke protection door, wherein the door closer (10) can be optionally mounted in a first installation position or in a second installation position and comprises: - a closer housing (24) that can be arranged on the active leaf (320); - a closer piston (32) that is slidably guided in the closer housing (24) and is in particular loaded in the closing direction (30) by a mechanical energy storage device (28), by which a hydraulic volume (33) of the closer housing (24) is divided into a first hydraulic chamber (34) and a second hydraulic chamber (36); - a closer shaft (38) rotatably mounted in the closer housing (24), cooperating with the closer piston (32), which can be coupled or is coupled in a rotationally fixed manner to a closer lever (22) of the door closer (10);- a flow channel arrangement (42) that fluidly connects the first hydraulic chamber (34) and the second hydraulic chamber (36); - a locking unit (26) with a first locking valve (46) arranged in the flow channel arrangement (42) for blocking the hydraulic flow from the first hydraulic chamber (34) to the second hydraulic chamber (36) and thus a closing movement of the closing piston (32) and the guide vane (320) in the first installation position, and a second locking valve (48) arranged in the flow channel arrangement (42) that can be controlled independently of the first locking valve (46) for blocking the hydraulic flow from the first hydraulic chamber to the second hydraulic chamber and thus a closing movement of the closing piston (32) and the guide vane (320) in the second installation position;- wherein in the first installation position the first locking valve (46) can be controlled via a release unit (208) of the closing sequence control (300) assigned to a fixed leaf (310) of the double-leaf door (300) as a function of an opening angle of the fixed leaf (310) in order to selectively lock or release the closing movement of the closer piston (32) and thus of the active leaf (320), and the second locking valve (48) is decoupled from the release unit (208); and - wherein in the second installation position the second locking valve (48) can be controlled via the release unit (208) of the closing sequence control (206) in order to selectively lock or release the closing movement of the closer piston (32) and thus of the active leaf (320), and the first locking valve (46) is decoupled from the release unit (208).; 2. Door closer (10) according to claim 1, further comprising a regulating valve (44) arranged in the flow channel arrangement (42) for adjusting at least one closing characteristic, in particular a closing time, of the door closer (10), wherein the regulating valve (44) is fluidly connected in the flow channel arrangement (42) to the first locking valve (46) and the second locking valve (48).

3. Door closer (10) according to claim 2, wherein the first locking valve (46) and the regulating valve (44) are fluidically connected in series in the flow channel arrangement (42), wherein the second locking valve (48) and the regulating valve (44) are fluidically connected in series in the flow channel arrangement (42), and wherein the first locking valve (46) and the second locking valve (48) are fluidically connected in parallel in the flow channel arrangement (42).

4. Door closer (10) according to claim 2 or 3, wherein, with respect to an overflow direction of a hydraulic fluid from the first hydraulic chamber (34) to the second hydraulic chamber (36), the regulating valve (44) is arranged upstream of the first shut-off valve (46) and the second shut-off valve (48) in the flow channel arrangement (42), wherein in particular a regulating valve outlet of the regulating valve (44) in the flow channel arrangement (42) is fluid-communicating with a shut-off valve inlet of the first shut-off valve (46) and a shut-off valve inlet of the second shut-off valve (48), and wherein in particular a shut-off valve inlet of the first shut-off valve (46) in the flow channel arrangement (42) is fluid-communicating with a shut-off valve inlet of the second shut-off valve (48).

5. Door closer (10) according to claim 2 or 3, wherein, with respect to an overflow direction of a hydraulic fluid from the first hydraulic chamber (34) to the second hydraulic chamber (36), the regulating valve (44) is arranged downstream of the first shut-off valve (46) and the second shut-off valve (48) in the flow channel arrangement (42), wherein in particular a regulating valve inlet of the regulating valve (44) in the flow channel arrangement (42) is fluid-communicating with a shut-off valve outlet of the first shut-off valve (46) and a shut-off valve outlet of the second shut-off valve (48), and wherein in particular a shut-off valve outlet of the first shut-off valve (46) in the flow channel arrangement (42) is fluid-communicating with a shut-off valve outlet of the second shut-off valve (48).

6. Door closer (10) according to one of the preceding claims, wherein in the first installation position of the door closer (10) the second shut-off valve (48) is permanently closed, so that a hydraulic flow through the second shut-off valve (48) into the second hydraulic chamber (36) is blocked, and wherein in the second installation position of the door closer (10) the first shut-off valve (46) is permanently closed, so that a hydraulic flow through the first shut-off valve (46) into the second hydraulic chamber (36) is blocked, in particular wherein the first shut-off valve (46) and the second shut-off valve (46) each have an NC valve characteristic.

7. Door closer (10) according to one of the preceding claims, wherein the flow channel arrangement (42) comprises one or more channel sections (50, 52, 54, 56, 58, 60, 64, 66, 68, 70, 72, 74) which are provided as deep holes in the closing housing (24).

8. Door closer (10) according to one of the preceding claims, wherein the first locking valve (46) and the second locking valve (48) are each mechanically actuated.

9. Door closer (10) according to one of the preceding claims, wherein the first locking valve (46) and the second locking valve (48) each have a valve body with a valve axis, wherein the valve axes of the locking valves (46, 48) are oriented parallel to each other and / or at least one of the valve axes of the locking valves (46, 48) is oriented parallel to a longitudinal axis (80) of the closer shaft.

10. Door closer (10) according to one of the preceding claims, wherein the locking valves (46, 48) are spaced apart from each other in a direction (H) oriented parallel to the longitudinal axis (80) of the closer shaft (38) and / or are arranged on opposite sides of the closer piston (32).

11. Door closer (10) according to one of the preceding claims, further comprising a closing element (40) closing the first hydraulic chamber (34) to the outside, with a preferably cylindrical projection (94) which engages fluid-sealingly in the first hydraulic chamber (34), wherein the flow channel arrangement (42) is formed at least sectionally by a groove (96) formed on the outer circumference of the projection (94) and an inner wall of the closer housing (24).

12. Door closer (10) according to one of the preceding claims, further comprising at least one locking element (84, 98) for selectively controlling, in particular actuating, the first locking valve (46) in the first installation position or the second locking valve (48) in the second installation position, in order to selectively block or release a closing movement of the active leaf (320).

13. Door closer (10) according to claim 12, further comprising a sleeve element (88) for transmitting a release by the release unit (208), which is slidably mounted on a closer end (23) of the closer lever (22) parallel to the longitudinal axis (80) of the closer shaft (38), wherein the sleeve element (88) can be coupled to the at least one locking element (84, 98).

14. Door closer system (200) for a double-leaf door (300), wherein the door closer system comprises a first door closer (204) for a fixed leaf (310) of the door (300) and a second door closer (10) for an active leaf (320) of the door (300), wherein the second door closer (10) is configured according to any one of claims 1 to 13, wherein the door closer system (200) further comprises a closing sequence control (206) with a release unit (208), a transmission unit (210) and the locking unit (26) of the second door closer (10), wherein in a first installation position the first locking valve (46) for transmitting a release of the closing sequence control (206) by the release unit (208) interacts with the transmission unit (210) and the second locking valve (48) is decoupled from the transmission unit (210),and wherein in the second installation position the second shut-off valve (48) for a transmission of a triggering of the closing sequence control (206) by the triggering unit (208) cooperates with the transmission unit (210) and the first shut-off valve (48) is decoupled from the transmission unit (210).

15. Double-leaf door (300) with an active leaf (320) and a fixed leaf (320), wherein the door (300) has a closer system (200) with a first door closer (204) for the fixed leaf (310) and a second door closer (10) for the active leaf (320), wherein the closer system (200) according to claim 14 or the second door closer (10) is designed according to one of claims 1 to 13.

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