Door closer

Abstract

The invention relates to a door closer (1) for closing a door (200), comprising a housing (2) and an output shaft (3) which is mounted in the housing and is designed to fasten a lever device (103); a mechanical energy store (4) in the housing (2) which acts on the output shaft (3) in order to rotate the output shaft, the energy store (4) preferably being designed as a spring; comprising a sensor (23) and a transmitter (21), the transmitter (21) being arranged or formed on the output shaft (3), and the sensor (23) being formed and arranged to identify the transmitter (21) in particular without contact.

Description

TECHNICAL FIELD

[0001] The invention relates to a door closer for closing a door. BACKGROUND

[0002] EP 3 315 704 A1 shows a system for monitoring safety-relevant functions of a door closer. Here, it is checked by means of a combination of a position signal and an acceleration signal whether there is a breakage or tampering at the door closer. Thus, for example, it can be identified whether a lever connected to an output shaft of the door closer has been unhooked. SUMMARY

[0003] It is an object of the invention to propose a door closer which achieves a safe use of the door by means of simple measures, in particular simple manufacture and low-maintenance operation.

[0004] The object is achieved by the features of the independent claims. Preferred design options of the invention are the subject matter of the dependent claims.

[0005] The invention shows a door closer for closing a door. The door closer has a housing. The housing is in particular made of metal, preferably cast. In the housing, an output shaft of the door closer is rotatably mounted. Here, the output shaft is rotatable about an axis of rotation.

[0006] The output shaft constitutes a fastening for a lever arrangement. According to a first mounting variant, the door closer can be fastened at a door, i.e. a door leaf. Here, the lever arrangement forms a connection to a wall. For example, a slide rail is fastened at the wall, to which the lever arrangement is connected. Within the scope of the invention, the expression "wall" also includes a door frame. According to a second mounting variant, the door closer can be fastened at a wall. Then, the lever arrangement forms a connection of the door closer to a door, i.e. to a door leaf. On the door, i.e. on the door leaf, for example, a slide rail is fastened, to which the lever arrangement is connected.

[0007] The door closer comprises a mechanical energy store. The mechanical energy store is in particular constituted as a spring. In particular, a coil spring is preferred. The mechanical energy store is arranged in the housing and loads the output shaft to rotate in a closing-rotating direction. As will also be described in detail, a transmission unit can be present between the energy store and the output shaft in order to convert between a movement of the output shaft and a movement of the energy store.

[0008] The output shaft is rotated in a "closing-rotating direction", in particular when the door closer is mounted according to the specification to close a door and the door is closed. When the door is opened, the output shaft is rotated in the opposite direction, which is also referred to as opening-rotating direction. The door closer is preferably constituted without a drive, so that in particular a door drive which operates in a motor-driven manner is not involved.

[0009] Preferably, the door closer is constituted without connection to an external power supply.

[0010] It can be provided that the door closer comprises hydraulic oil in order to dampen the closing movement.

[0011] The door closer also comprises a sensor unit which is preferably designed and arranged for detecting the actual angle of rotation of the output shaft. The sensor unit comprises a sensor and a transmitter.

[0012] The transmitter is arranged or designed at the output shaft. The transmitter is preferably at least indirectly arranged with its own component which is connected in particular at the output shaft. The transmitter and the output shaft are in particular designed such that the transmitter rotates with the output shaft.

[0013] Alternatively, the output shaft can also be designed such that it serves as the transmitter.

[0014] The sensor of the sensor unit is designed and arranged for detecting the transmitter in particular contactlessly. It is particularly preferred that the sensor is designed here to detect the position and / or the rotation and / or the acceleration of the transmitter. It is in particular provided here that the combination of the sensor and the transmitter enables the detection of the actual angle of rotation of the output shaft.

[0015] The sensor unit enables the detection of the position and / or the movement of the output shaft by means of a simple means. Since the transmitter is directly at the output shaft, the position and / or the movement can be detected very precisely. From this, it can be concluded that the door closer is functioning in compliance with the regulations, whereby a reliable operation of the door is possible. It is possible, for example, to recognize whether the door is open or closed. Furthermore, it is thus possible to recognize whether the lever device is damaged or tampered with, as this is also described in detail in connection with the evaluation unit.

[0016] The arrangement of the transmitter directly or indirectly only via the transmitter fastening means at the output shaft also has the advantage that the transmitter and thus the entire sensor device can be supplemented to an existing door closer. For these existing door closers, there is usually already the necessary approval, so that by supplementing the sensor unit, no or only a slight change of the approval is necessary. This is in particular due to the fact that the relatively small transmitter does not influence the mechanical action within the door closer and thus does not influence the basic function of the door closer, i.e. the safe closing of the door, by the sensor unit.

[0017] The axis of rotation of the output shaft preferably passes through the sensor and / or the transmitter. Thereby, it is ensured that the sensor and the transmitter are arranged as close as possible to the axis of rotation, whereby an exact detection of the actual angle of rotation on the narrowest space is possible.

[0018] It can be provided that the transmitter is arranged symmetrically with respect to the axis of rotation, whereby the axis of rotation intersects the center of the transmitter, in particular the dividing line between the south pole and the north pole.

[0019] Preferably, the sensor is arranged symmetrically with respect to the axis of rotation, whereby the axis of rotation passes through the sensor in particular in the center of the sensor.

[0020] It is proposed that the sensor is arranged, in particular fastened, at a sensor accommodation device. The sensor accommodation device positions the sensor, preferably at the end side of the output shaft.

[0021] The sensor accommodation device comprises a holder. The holder is in particular one piece.

[0022] Preferably, the holder is made of plastic.

[0023] Preferably, it is proposed that the sensor accommodation device comprises a sensor circuit board. The sensor is arranged on the sensor circuit board and the sensor circuit board is preferably fastened at the holder.

[0024] Preferably, it is proposed that the door closer comprises a mounting plate and the housing of the door closer is fastened at the mounting plate. The mounting plate preferably comprises fastening elements, in particular holes, in order to screw the mounting plate at the door or wall and in order to fasten the housing and, if necessary, further elements at the mounting plate.

[0025] Preferably, the sensor accommodation device, in particular the holder, is fastened at the mounting plate. In particular, the sensor accommodation device is reversibly releasably fastened, in particular screwed, at the mounting plate. For example, the sensor accommodation device can be fastened directly at the mounting plate. It is thereby possible to position the sensor relatively fixedly and azimuthally precisely.

[0026] The sensor accommodation device is attached at and / or can be fastened at the housing of the door closer. In particular, the sensor accommodation device is reversibly releasably fastened at the housing, i.e. is connected form-fittingly and / or force-fittingly. For example, the sensor accommodation device can be fastened directly at the housing. The fastening relative to the housing in particular enables a very precise positioning of the sensor relative to the transmitter at the output shaft.

[0027] It can be proposed that the housing comprises a housing base body. The housing, in particular the housing base body, can comprise an opening. The opening is in particular for accommodating the output shaft and / or a bearing of the output shaft.

[0028] The housing can comprise a bearing closure. The bearing closure can be accommodated in the housing base body, in particular in the opening. It can be proposed that the bearing closure is arranged in the opening in such a way that the opening is partially not closed. In other words, it can thus be proposed that the bearing closure is retracted relative to the outer edge of the opening.

[0029] The housing can comprise an inner face. The inner face preferably surrounds the opening.

[0030] The holder preferably has a holder protrusion.

[0031] The holder protrusion preferably extends around the output shaft and / or the transmitter, such that the output shaft and / or the transmitter protrudes into the holder protrusion.

[0032] It can be provided that the holder, in particular the holder protrusion, extends into the opening of the housing. Preferably, the holder, in particular the holder protrusion, lies against the inner face. Thereby, the holder lies against the housing.

[0033] Preferably, the holder, in particular the holder protrusion, lies against the housing at a plurality of, in particular at least three, locations. Thereby, an exact positioning of the holder protrusion relative to the transmitter is achieved.

[0034] It is particularly preferred that the holder protrusion lies against the housing, in particular in the opening, by means of the circumference of the holder protrusion, in particular by means of the outer circumference of the holder protrusion. Thereby, a very exact positioning of the sensor relative to the transmitter is achieved.

[0035] Preferably, the holder is firmly clamped at the housing.

[0036] Preferably, the holder, in particular the holder protrusion, is clamped at the inner face of the housing radially outwardly, whereby the holder is fastened at the housing. The inner face can surround the opening.

[0037] Instead of or in addition to the lying of the holder at the inner face of the housing, the housing can comprise a protruding rim. The holder can lie against the outer face of the protruding rim. Preferably, the holder can lie against, in particular clamped against, the outer face at a plurality of locations, in particular preferably on a circumference.

[0038] Preferably, the holder, in particular the holder protrusion, is supported onto the housing, in particular axially inwardly. It can thereby be provided that the holder, in particular the holder protrusion, lies against the housing in the direction of the rotational axis of the output shaft. Thereby, in particular a positioning of the sensor towards the transmitter can be determined.

[0039] In particular, the holder, in particular the holder protrusion, lies against the bearing closure.

[0040] It is preferably provided that the door closer comprises a housing. The housing covers at least the housing of the door closer. The housing is preferably fastened at the mounting plate.

[0041] Preferably, the housing has opposite end walls. The end walls are preferably connected to one another via opposite side walls.

[0042] It is in particular provided that the two end walls and the two side walls jointly form a base body of the housing. Said base body of the housing is preferably closed by means of a removable cover of the housing.

[0043] Additionally or alternatively, the sensor accommodation device can in particular lie against the housing on the inner side. Preferably, the holder is clamped between the housing and the housing. Thereby, a further possibility of positioning the sensor accommodation device, and thus the sensor, exactly and as gapless as possible is obtained.

[0044] Preferably, the sensor accommodation device comprises at least one fastening spring, in particular as part of the overall bracket. The fastening spring is used in particular to press the remaining sensor accommodation device onto the housing. Thereby, the positioning of the sensor is further improved.

[0045] The fastening spring can be supported at a component of the door closer, in particular at the housing.

[0046] The fastening spring can be used to put the bracket, in particular the clamped-in bracket, under pretension.

[0047] The housing preferably comprises at least one bracket accommodation for the bracket.

[0048] Preferably, the bracket rests at the bracket accommodation and / or at the mounting plate.

[0049] Preferably, the housing comprises a fastening tab, wherein the fastening tab is left free at the bracket accommodation for inserting the bracket. By means of the fastening tab, the housing can be fastened, in particular screwed, at the mounting plate.

[0050] Preferably, the bracket accommodation is embodied double on the inside at one of the two side walls of the housing. Said double embodiment of the bracket accommodation is applied in particular when the housing is switched between a left-hand and a right-hand arrangement, as this is also explained in detail.

[0051] It is preferably proposed that the transmitter comprises a permanent magnet and the sensor is a magnetic sensor, in particular a Hall sensor.

[0052] Preferably, the permanent magnet is embodied such that a north pole forms one end of the permanent magnet and a south pole forms the other end of the permanent magnet. Thus, when the transmitter is rotated, the north pole and the south pole change their position in space. For example, the permanent magnet is embodied circularly and the north pole and the south pole form half of the permanent magnet, respectively.

[0053] The transmitter is preferably fastened, in particular screwed, at the output shaft on the end side.

[0054] It can be proposed that the transmitter is fastened torsionally at a transmitter fastening device. In particular, the transmitter fastening device is connected form-fittingly and / or force-fittingly with the output shaft. In particular, the transmitter fastening device rotates with the output shaft when the door closer is operated. Preferably, the transmitter fastening device is fastened directly at the output shaft and / or the transmitter is fastened directly at the transmitter fastening device.

[0055] It is particularly preferred that the output shaft has a fastening device accommodation on at least one side, in particular on both sides. Said fastening device accommodation is in particular a hole which is coaxial to the rotational axis of the output shaft.

[0056] The fastening device accommodation is particularly preferably provided with an internal thread.

[0057] A transmitter fastening device is preferably inserted in the fastening device accommodation, preferably fastened, particularly preferably screwed in.

[0058] The transmitter fastening device has a fastening head. The transmitter is preferably fastened, in particular adhered, on the fastening head.

[0059] In a preferred embodiment, the fastening head has a form-fit element which ensures an orientationally exact positioning of the transmitter. It is furthermore preferably proposed that the fastening head has a rim which surrounds the transmitter, so that an orientationally exact fastening of the transmitter on the fastening head is also ensured by the rim.

[0060] The transmitter fastening device is preferably at least partially made of plastic.

[0061] The output shaft is preferably exposed at two opposite sides of the housing. Thus, the output shaft can constitute a fastening for the lever device selectively at one side or the other side. It is proposed here that the lever device can be fastened at both sides of the output shaft, however, as described by the expression "selectively", in reality only at one of the two sides.

[0062] Thus, in the specific door closer in the installed condition, a first side of the output shaft is used for fastening the lever device. The transmitter is preferably fastened, at least indirectly, on the further second side of the output shaft. The further second side is in principle also suitable for fastening the lever device.

[0063] The output shaft can comprise fastening device accommodations on both sides. Both fastening device accommodations are in principle suitable for fastening fastening elements for fastening the lever device at the output shaft. The fastening elements can correspond to screws, for example. The fastening device accommodations can be designed to accommodate the same fastening elements, for example.

[0064] It is preferably proposed that the fastening device accommodations are used for fastening the lever device. In the installed door closer, a fastening element is fastened in the fastening device accommodation on one side of the output shaft, by means of which the lever device is fastened at the output shaft. A transmitter fastening device is provided in the further fastening device accommodation on the other side of the output shaft.

[0065] In particular, the output shaft has a connection end, preferably polygonal, preferably quadrangular, for fastening the lever device torsionally at both opposite exposed sides.

[0066] The connection end is at least partially provided in the opening, so that the lever device can enclose the connection end. It can be proposed here that the connection end projects from the opening or is completely in the opening.

[0067] It can be proposed that both connection ends are surrounded by the opening. It is possible that a bearing closure is provided retracted at both sides of the output shaft.

[0068] Since the sender is preferably mountable at each of the connection ends, the sensor accommodating device must also be mountable on both sides of the output shaft. It is possible that the openings on both sides have different depths. It is thus possible that different holders are provided for both sides. It is possible that each of the holders axially abuts at the bearing closure and / or each of the holders radially abuts at the opening. It is possible that each of the holders abuts in the opening at several points, in particular on a ring circumference. Preferably, each of the holders can be clamped in the opening. By the different depths of the openings it is possible that the holders are configured differently high.

[0069] For example, the sensor and / or the sensor circuit board can be fastened at two holders.

[0070] In a mounted door closer, the lever device is fastened at one side of the output shaft and the sender is fastened at the other side of the output shaft. Thus, the respective side of the output shaft, which is not used for the lever device, can be used for the sensor device.

[0071] The lever device preferably comprises a slide rail and a lever, wherein one end of the lever is guided in the slide rail and the other end of the lever can be fastened at the output shaft.

[0072] Alternatively, the lever device preferably comprises a link, wherein the link has levers which are rotatably connected to each other. One end of the link can be fastened at the output shaft. If the door closer is mounted at a door, the other end of the link can be rotatably fastened at a wall, or if the door closer is mounted at a wall, the other end of the link can be rotatably fastened at a door.

[0073] As mentioned above, the sender is preferably located at the output shaft and rotates with the output shaft. In contrast thereto, the sensor is fixedly mounted, however preferably in close proximity to the sender, in particular at the end side of the output shaft.

[0074] Preferably, the door closer comprises a module. The module has at least one battery and / or a data transmission unit.

[0075] Preferably, the sensor is connected with the module for data and / or current transmission.

[0076] The module and the sensor unit can be connected with each other by a cable.

[0077] The data transmission unit is preferably configured for wireless data transmission.

[0078] The at least one battery is preferably configured for powering the sensor unit and / or the data transmission unit. It is particularly preferred to propose that the data transmission unit is configured for transmitting a battery status of the at least one battery, i.e. for example a charging status.

[0079] As already mentioned, the door closer can comprise a housing which covers the housing of the door closer. In particular, the module is preferably located completely under the housing. It is particularly preferred that the module is fastened at the inner side at the housing.

[0080] Preferably, the module can be fastened at one of the end walls of the housing, particularly preferably alternatively at both end walls of the housing.

[0081] The module, due to the selective left-hand and right-hand arrangement of the housing, is preferably able to be arranged on both sides of the housing. Thus, there are preferably module receptacles for fastening the module at both end walls of the housing.

[0082] Additionally or alternatively, the module is preferably able to be fastened on a mounting plate. Preferably, the module can be fastened at two opposite sides of the mounting plate.

[0083] Preferably, the module can be loosened without damage from the housing and / or the mounting plate, preferably without tools, in particular for replacing the battery.

[0084] The module preferably has a module circuit board. The module is fastened in particular by means of this module circuit board. In particular, the module circuit board is fastened at the housing, preferably at the module receptacle.

[0085] It is particularly preferred that the module has a housing device. This housing device is in turn fastened at the module circuit board. The housing device preferably constitutes a receptacle for at least one battery.

[0086] Preferably, the module is fastened at a distance from the mounting plate. In the event of a fire, if a warming of the mounting plate occurs via the door, this distance can prove advantageous, since no heat is directly transmitted to the module, and thus to the battery, by means of said distance. In particular, said distance is selected such that the at least one battery is spaced apart from the mounting plate by at least 5 mm.

[0087] The housing has a first end side which, when the door closer is installed, should be directed towards the hinge of the door. Furthermore, a second end side of the housing is defined which is opposite the first end side. Correspondingly, the second end side is directed towards the main closing edge of the door. The module is preferably arranged next to the second end side of the housing.

[0088] Preferably, the mounting plate, the housing and the module constitute a housing which can be fastened on the mounting plate on the left-hand and right-hand sides without the mounting plate being turned. In the left-hand arrangement, the hinge of the door is on the left-hand side of the door closer; in the right-hand arrangement, the hinge of the door is on the right-hand side of the door closer. Here, the first end side should always be directed towards the hinge.

[0089] In the left-hand arrangement of the housing, the module is located next to the housing above the mounting plate on the right-hand side. In the right-hand arrangement of the housing, the module is located next to the housing above the mounting plate on the left-hand side. In particular, in both arrangements, the module is located completely above the mounting plate so as not to project laterally beyond the mounting plate.

[0090] In particular, the mounting plate and the housing constitute a fastening of the housing on the mounting plate on the left-hand side along one orientation and on the right-hand side along an orientation rotated through 180°.

[0091] As already mentioned, the door closer can comprise a transmission unit, which is located in the housing of the door closer and constitutes a transmission of movement between the output shaft and the energy store. In particular, the transmission unit constitutes a mutual transmission between the rotational movement of the output shaft and the linear movement of the energy store.

[0092] The transmission unit preferably has a cam, which rotates with the output shaft. The cam is in particular located on the output shaft and can be an integral component part of the output shaft.

[0093] The cam is in particular heart-shaped, with two convex sides, which merge into a recess.

[0094] The transmission unit preferably comprises a door closer piston, which is rolling or slidingly guided at the cam. In particular, there is a door closer piston roller at the door closer piston, which rolls at the cam. The door closer piston is in particular linearly movably guided in the housing and is loaded by the energy store. If the door closer piston moves in one direction, it loads the energy store with energy. When the energy store releases energy, the door closer piston is pressed by the energy store in the opposite direction.

[0095] At the housing, two halves can be defined, wherein a first half is assigned to the first end side and a second half is assigned to the second end side. The output shaft is in the first half, closer to the first end side than to the second end side. The energy store is preferably at least partially in the second half, closer to the second end side than to the first end side. Thus, the energy store is arranged between the output shaft and the second end side.

[0096] The invention also comprises a monitoring system, which comprises the described door closer and an evaluation unit. The evaluation unit is preferably electronically constituted. The evaluation unit preferably comprises an electronic processor and / or an electronic memory. It can be proposed that the evaluation unit comprises a timer for determining a time and / or a time period.

[0097] Preferably, the output shaft is rotated within a first angle range for opening and closing the door. The first angle range is different from a second angle range, into which the output shaft can be rotated, however, as long as the door closer is properly installed at the door and is in operation, the second angle range is not occupied by the output shaft. If the door closer is not installed, the output shaft is rotated in particular into the second angle range, because here the energy store releases energy to the greatest possible extent. Thereby, a limit value for the actual rotation angle can be defined, which is not reached in the installed door closer or only in the closed position. The limit value can delimit the second angle range.

[0098] When installing the door closer, the lever device is installed onto the output shaft and the output shaft is rotated via the lever device into the first angle range. If the door closer is already installed, the lever device is always connected on one side with the output shaft and on the other side with the wall or with the door.

[0099] Thereby, the output shaft can only be moved within the first angle range.

[0100] In particular, the output shaft can be rotated up to a limit between the first angle range and the second angle range, however, not into the second angle range. It follows that the limit between the first angle range and the second angle range represents a "closed position" of the output shaft. In said closed position of the output shaft, the associated door is closed. The angle for the closed position of the output shaft is referred to as "closed-rotation angle". For example, the closed-rotation angle can correspond to the limit value, whereby the limit between the first angle range and the second angle range is defined in the evaluation unit.

[0101] If now a damage occurs at the door closer or at the lever device or the lever device is tampered with, in particular is loosened, the output shaft is rotated from the first angle range into the second angle range. Here the limit value is passed.

[0102] As still described in detail, the evaluation unit does not necessarily have to be in the door closer, but can also be in any other location. The limit value, in particular the closed-rotation angle, is saved in the evaluation unit.

[0103] The limit value, in particular the closed-rotation angle, can be a value which is fixedly stored in the evaluation unit or a value which can be changed depending on the installation position of the door closer. It is also possible that the closed-rotation angle is determined in the evaluation unit by a corresponding learning process after the installation of the door closer.

[0104] The evaluation unit preferably constitutes for generating a notification when the actual rotation angle is in the second angle range, in particular when the actual rotation angle has passed the limit value; the generation of the notification is therefore dependent on whether the actual rotation angle is in the second angle range.

[0105] The notification is for example a signal, which the evaluation unit generates and which is further used in the evaluation unit itself, for example in order to issue a warning, and / or which the evaluation unit transmits to another unit. On the basis of the notification generated in the evaluation unit, it can be concluded that there is a damage or tampering as described above. From this it can be concluded in turn that the door can not have been closed properly by means of the door closer, which is particularly important in fire doors.

[0106] It is preferably proposed that the door closer is designed for the output shaft to be turned into the second angular range as soon as the connection between the output shaft and the door or between the output shaft and the wall, in particular the lever arrangement, is loosened. It is particularly taken into account here that the lever arrangement connects the output shaft to the door as long as the door closer is fastened at the wall or as long as the door closer is fastened at the door.

[0107] Furthermore, it is preferably proposed that the output shaft is loaded by the energy store in its closed position, i.e. when the door is closed, to turn in the closing-rotation direction. This means in particular that the output shaft is also loaded by the energy store in its closed position and that the energy store has not completely released its energy here. It is ensured in particular thereby that the energy store can also turn the output shaft out of the closed position into the second angular range.

[0108] The door closer piston is preferably guided at one side of the cam. The side extends up to into the recess of the cam, wherein the door closer piston, in particular by means of its door closer roller, rests at the side in the closed position of the output shaft so as to be in the first angular range, but not at the recess. When the actual rotation angle movement enters into the second rotation angle range, the door closer piston moves along the side towards the recess.

[0109] The pretension of the energy store or the energy stored in the energy store decreases when the output shaft is turned in the closing-rotation direction, wherein it is in particular proposed that the minimum pretension in the energy store is present not in the closed position, but in the second angular range.

[0110] Preferably, the output shaft can be turned in the opening-rotation direction to load the energy store with energy when the door is opened. This opening of the door is in particular carried out by manually manipulating the door, in particular by a user manually manipulating.

[0111] Preferably, the evaluation unit is designed in such a way that the door closing time is monitored by means of the evaluation unit. For this purpose, the evaluation unit receives the actual rotation angle. This is possible for example by detecting how long the rotation angle changes in the closing-rotation direction until the closing-rotation angle is finally reached. If the detected door closing time deviates from at least one time limit value, a corresponding notification is preferably issued. On the basis of the notification, for example the maintenance of the door closer can be taken into account.

[0112] Here, the door closing time can be too short or too long. Therefore, an upper time limit value and a lower time limit value can also be defined for the door closing time.

[0113] The at least one time limit value is stored in the evaluation unit, in particular electronically. If the at least one time limit value is not adhered to, the evaluation unit is configured to generate a notification.

[0114] It is preferably proposed to monitor how long the door is open. Thus, the door opening time can be monitored. This can be done by checking the actual rotation angle periodically. Preferably, the evaluation unit is configured to determine and / or monitor the door opening time. For this purpose, the evaluation unit can track the actual rotation angle in the first angle range which does not correspond to the closing-rotation angle over time, for example. The evaluation unit is configured to generate a corresponding notification when the door is in the open state for longer than a preset duration value. The duration value can be stored in an electronic memory of the evaluation unit.

[0115] Furthermore, the evaluation unit is preferably configured to generate an alarm cancellation notification when the actual rotation angle is again in the first rotation angle range after it has been detected in the second angle range.

[0116] Furthermore, the evaluation unit is preferably configured to generate an alarm cancellation notification when the actual rotation angle corresponds to the closing-rotation angle when the duration value has been exceeded before.

[0117] Additionally or alternatively, a contact alarm notification can be generated when a person acknowledges the corresponding alarm, for example at the described external unit or at the door by manipulating the operating element.

[0118] As already mentioned, the evaluation unit is in particular configured to forward the generated notification to an external unit. The external unit can be a building control unit and / or a cloud and / or a server and / or a terminal device and / or a mobile terminal device. The terminal device is a computer, for example. The mobile terminal device is a smartphone or a tablet, for example.

[0119] By forwarding the notification from the evaluation unit to the external unit, a corresponding alarm can be generated in the unit in any way and method. On a mobile terminal device, for example, it can be displayed that there is a damage or tampering at a particular door closer.

[0120] According to an optional first variant, the evaluation unit which generates the notification is arranged as an internal evaluation unit in the region of the door, in particular in the door closer. In particular, the expression "in the door closer" is to be understood as meaning that the evaluation unit is located below the housing of the door closer. Alternatively, the evaluation unit can also be located next to the door closer, for example in the region of the door.

[0121] According to an alternative second variant, the evaluation unit generating the notification is expanded to an external evaluation unit, wherein the door closer constitutes a means for transmitting the actual rotation angle or a value derived therefrom to the external evaluation unit, in particular by means of a data transmission unit which will be described hereinafter.

[0122] If the evaluation unit constitutes an internal evaluation unit, at least one battery of the module for supplying the evaluation unit with power is preferably provided.

[0123] If an external evaluation unit is involved, the data transmission unit of the module can transmit the actual rotation angle or a value derived therefrom to the external evaluation unit. If an internal evaluation unit is involved, the generated notification can be transmitted to an external unit, i.e. for example a server or a terminal device, via the transmission unit.

[0124] Furthermore, it is preferably proposed that a status message is generated at regular intervals. The status message can be generated in the door closer in the case of an internal evaluation unit and transmitted to an external unit via the data transmission unit. In the case of an external evaluation unit, the status message can likewise be generated within the door closer and transmitted to the external evaluation unit via the data transmission unit. The regular transmission of the actual rotation angle or a value related thereto can also be regarded as a status message. If the status message is missing and / or faulty and / or has a corresponding content, an alarm is preferably generated by means of an external unit, i.e. for example a server or a mobile terminal device.

[0125] The application also comprises a method for operating a monitoring system, in particular the monitoring system described above. The advantageous design solutions described with respect to the monitoring system and the dependent claims pertaining to the monitoring system are correspondingly advantageously applied in the context of the method.

[0126] The method proposes that an actual rotation angle is detected, which is related to a rotation angle of an output shaft of the door closer. As described, the output shaft serves for fastening a lever arrangement. The output shaft is loaded by a mechanical energy store of the door closer to rotate in a closing-rotation direction. Here, the output shaft is rotatable into a first angular range which can be used for opening and closing the door and is rotatable into a second angular range.

[0127] When the actual rotation angle is in the second angular range, a notification is generated, wherein the closing-rotation angle represents a closing position of the output shaft and thus of the door, and the first angular range is separated from the second angular range. The generation of the notification takes place in particular by means of the evaluation unit described. BRIEF DESCRIPTION OF DRAWINGS

[0128] The application will now be described in detail according to an embodiment. Herein, it is shown:

[0129] Figure 1schematic view of a monitoring system according to the application with an external evaluation unit and a door closer according to the application according to one embodiment,

[0130] Figure 1 a schematic view of a variant of a monitoring system according to the application with an internal evaluation unit in a door closer according to the application according to this embodiment,

[0131] Figure 2 perspective view of a door closer according to the application according to this embodiment,

[0132] Figure 3 exploded view of a door closer according to the application according to this embodiment,

[0133] Figure 4 components in the interior of the housing of a door closer according to the application according to this embodiment,

[0134] Figure 5 schematic sectional view of a detail of a door closer according to the application according to this embodiment;

[0135] Figure 6 perspective view of a door closer according to the application without housing according to this embodiment,

[0136] Figure 7 schematic view of a section A-A marked in Figure 2 ,

[0137] Figure 8 a detail in Figure 7 ,

[0138] Figure 9 end side of an output shaft of a door closer according to the application according to this embodiment;

[0139] Figure 10 sensor accommodation device of a door closer according to the application according to this embodiment,

[0140] Figure 11 detail of a housing of a door closer according to the application according to this embodiment,

[0141] Figure 12 variant of a sensor accommodation device of a door closer according to the application according to this embodiment,

[0142] Figure 13 perspective view of a door closer according to the application with an open cover according to this embodiment,

[0143] Figure 14 sectional view of a module in a door closer according to the application according to this embodiment,

[0144] Figure 15 a perspective view of a module of a door closer according to the application according to this embodiment,

[0145] Figure 16 a variant of the design of a module of a door closer according to the application according to this embodiment,

[0146] Figure 17 a variant of the design of a module of a door closer according to the application according to this embodiment, Figure 16 a sectional view of a variant of the module in

[0147] Figure 18 a variant of the design of a module of a door closer according to the application according to this embodiment, and

[0148] Figure 19 different views of the left-hand and right-hand side of the housing of a door closer according to the application according to this embodiment, with different components hidden for an overview. DETAILED DESCRIPTION

[0149] In the following, a door closer 1 according to the application is described. The door closer can be a component of a monitoring system 100 according to the application. Figures 1 to 19 According to the application,

[0150] the monitoring system 100 comprises an evaluation unit 101. In Figure 1 the evaluation unit 101 is located outside the door closer 1 as an external evaluation unit 101. Alternatively, the evaluation unit 101 can also be a component of the door closer 1 as an internal evaluation unit 101 according to Figure 1 Figure 1 a

[0151] Furthermore, the monitoring system 100 comprises an external unit 102, for example a server, a cloud, a building control unit, a terminal device or a mobile terminal device. The evaluation unit 101 and the external unit 102 are connected to one another for data transmission.

[0152] The door closer 1 comprises a data transmission unit 44. In Figure 1 wireless data transmission from this data transmission unit 44 to the external evaluation unit 101 is shown purely schematically. If, according to Figure 1 a the evaluation unit 101 is located inside the door closer 1 as an internal evaluation unit, the data transmission unit 44 transmits wirelessly to the external unit 102.

[0153] The monitoring system 100 also comprises a lever device 103. Components of the lever device 103 are a lever 104 and a slide rail 105.

[0154] According to the application, Figure 1 ​​The door closer 1 is located at the door 200. Correspondingly, the slide rail 105 is fastened at the wall 202. The lever 104 connects the door closer 1 with the slide rail 105 at the wall 202. As Figure 1 is shown in the schematic view, the wall 202 is synonymous with the door frame of the door 200.

[0155] Via the two hinges 201, the door 200 is supported in rotatable movement with respect to the wall 202.

[0156] In the following, reference is always made to all the figures, unless otherwise specified in detail:

[0157] The door closer 1 has a housing 2. At the housing 2, a first end side 2.1 and an opposite second end side 2.2 are defined (see Figure 3 ).

[0158] In addition to the housing 2, the door closer 1 has a mounting plate 50 and a housing 30. The housing 2 is fastened on the mounting plate 50. The mounting plate 50 comprises fastening elements 51 which are configured as holes. The mounting plate 50 serves for fastening the door closer 1 at the door 200 or the wall 202. Furthermore, the door closer 1 comprises a module 40. Figure 3 An exploded view of the four components, namely the housing 2, the module 40, the housing 30 and the mounting plate 50, is shown.

[0159] Furthermore, the door closer 1 has an output shaft 3. The output shaft 3 is supported in rotatable movement in the housing 2 and is loaded by an energy store 4 which is configured as a coil spring (see Figure 4 ). As is shown in particular Figure 7 , the output shaft 3 is supported on both sides by means of bearings 13. The bearings 13 are protected by means of screwed-on bearing closures 14. The bearing closures 14 are considered to be an integral part of the housing 2.

[0160] The output shaft 3 is exposed on both sides (see Figure 7 ), so that in principle a lever device 103 can be fastened at the output shaft 3 on both sides. In reality, however, only one side of the output shaft 3 is used for fastening the lever device 103. The respective other side of the output shaft 3 is used in the door closer 1 for positioning a sensor unit 20.

[0161] The output shaft 3 has at its two sides respectively a connection end 3.1 which is configured here as a quadrilateral. The output shaft 3 is rotatable about a rotation axis 3.3. Coaxially to the rotation axis 3.3, the output shaft 3 has on both sides each a fastening device accommodation 3.2. The fastening device accommodation 3.2 is configured as a hole with an internal thread and serves for fastening a lever device 103 or a transmitter 21 of a sensor unit 20, as this will also be described in detail.

[0162] Both fastening device accommodations 3.2 are identically configured. Thereby, the same fastening element can be introduced in each fastening device accommodation 3.2 in order to fasten the lever 104.

[0163] In Figure 4 , the housing 2 is hidden so that the interior components can be seen. In this regard, the door closer 1 comprises a transmission unit 5 in the interior of the housing 2. The transmission unit 5 has a cam 5.1 which rotates together with the output shaft 3. At the cam 5.1, a door closer piston 5.2 is rollingly guided by means of a door closer piston roller 5.3. Here, the door closer piston roller 5.3 rolls on a flank 5.4 of the cam 5.1. This is shown in detail by the schematic sectional view in Figure 5 .

[0164] Furthermore, Figure 4 and Figure 5 show that a damping piston 6 is linearly movably guided in the housing 2. The damping piston 6 is also rollingly guided at the cam 5.1 by means of a damping piston roller 7.

[0165] The cam 5.1 has two opposite flanks 5.4 which merge into a recess 5.5. The flanks 5.4 here extend convexly so that a cam 5.1 in the shape of a heart results.

[0166] In the views according to Figure 4 and Figure 5 , the energy store 4 is in the state of releasing energy. The door closer piston roller 5.3 is resting at the cam 5.1 within the recess 5.5. This relative position between the cam 5.1 and the door closer piston roller 5.3 results only when the door closer 1 has not yet been installed or when the connection via the lever device 103 is interrupted due to damage or tampering. If, however, the door closer 1 has been installed functionally correctly and ensures the connection between the door closer 1 and the wall 202 via the lever device 103, the output shaft 3 is rotated so that the door closer piston roller 5.3 rests outside the recess 5.5. Figure 5 .

[0167] Figure 5 The closing-rotation direction 12 is purely schematically illustrated along which the drive shaft 3 is rotated when the door 200 is closed. The opening-rotation direction runs counter to the drawn closing-rotation direction 12.

[0168] Furthermore, Figure 5The closing-rotation angle 10, which separates the first angle range 8 and the second angle range 9 from each other, is purely exemplary shown as a line. For the sake of simplicity, it is shown here as a line, since it is not important in the context of the present application from which 0° position of the closing-rotation angle 10 the measurement is made, but it is important that the closing-rotation angle 10 separates the first angle range 8 from the second angle range 9. The exemplary plotted rotation angle of the output shaft 3 is the actual rotation angle 11, which is also shown as a line in simplified form. The reference edge of all rotation angles, including the closing-rotation angle 10 and the actual rotation angle 11, can in principle be placed in different positions, since only the relative values of the rotation angles to each other are important.

[0169] The actual rotation angle 11 is located in the second angle range 9 according to the schematic drawing in Figure 5 . If the output shaft 3 is rotated against the closing-rotation direction 12, the actual rotation angle 11 moves out of the second angle range 9, beyond the closing-rotation angle 10 and into the first angle range 8. During normal use of the door, the actual rotation angle 11 only moves in this first angle range 8.

[0170] However, if a damage or tampering occurs, in particular at the lever device 103, the output shaft 3 is rotated along the closing-rotation direction 12 due to the loading of the energy store 4 until the actual rotation angle 11 is detected again in the second angle range 9.

[0171] In order to detect the actual rotation angle 11, a sensor unit 20 is provided according to the present application. The exact design of the sensor unit 20 is seen in particular from Figure 3 , 4 and Figures 6 to 12 . In this regard, according to the present application, a sender 21 is indirectly provided at the output shaft 3. The sensor 23 is designed to recognize the sender 21 and to determine the actual rotation angle 11.

[0172] Accordingly, the sensor unit 20 comprises a sender fastening device 22 for fastening the sender 21 at the output shaft 3. The sender fastening device 22 is preferably made of plastic. The sender fastening device 22 is screwed into a fastening device receptacle 3.2 of the output shaft 3. Further fastening device receptacles 3.2 are provided for fastening the levers 104.

[0173] The sender fastening device 22 has a fastening head 22.1 (see Figure 8 ). The sender 21, which is designed in particular as a permanent magnet, is placed in particular on the fastening head 22.1. Thereby, the sender 21 is fastened at the output shaft 3 on the end side and rotates with the output shaft 3.

[0174] The fastening head 22.1 comprises an edge 22.2 and a form-fit element 22.3 (see Figure 9). The edge 22.2 surrounds the transmitter 21. The form-fit element 22.3 and the transmitter 21 engage into one another. By means of the edge 22.2 and / or the form-fit element 22.3, an exact positioning of the transmitter 21 with respect to the output shaft 3 and thus with respect to the axis of rotation 3.3 is possible. In particular, it is possible to achieve that the transmitter 21 is arranged symmetrically with respect to the axis of rotation 3.3. Furthermore, the axis of rotation 3.3 passes through the transmitter 21.

[0175] The transmitter fastening device 22 can have a tool engagement 22.4, which in particular simplifies the screwing of the transmitter fastening device 22 into the fastening device receptacle 3.2.

[0176] The sensor 23, which is embodied here as a Hall sensor, is arranged immediately adjacent to the transmitter 21, without, however, contacting the transmitter 21. The sensor 23 is embodied to detect different orientations of the transmitter 21, which is embodied as a permanent magnet.

[0177] The sensor 23 is fastened by means of a sensor receptacle device 24 at the end side of the output shaft 3, i.e. immediately adjacent to the transmitter 21. Thereby, the sensor 23 is also arranged symmetrically with respect to the axis of rotation 3.3. At the same time, the axis of rotation 3.3 passes through the sensor 23.

[0178] The sensor receptacle device 24 comprises a bracket 24.1 and a sensor circuit board 24.2. The sensor 23 is located on the sensor circuit board 24.2. The sensor circuit board 24.2 is fastened by means of the bracket 24.1.

[0179] The bracket 24.1 has a bracket protrusion 24.4 (see Figure 7 、 8 , 10). The bracket protrusion extends around the output shaft 3, so that the output shaft 3 projects into the bracket protrusion 24.4.

[0180] The bracket protrusion 24.4 abuts axially internally against the housing 2, in particular against the bearing closure 14. Thus, the bracket 24.1 is applied at the housing 2. Radially externally, the bracket protrusion 24.4 is clamped at the inner face of the housing 2, whereby the bracket 24.1 is fastened at the housing 2.

[0181] The inner face of the housing 2 surrounds an opening of the housing 2, into which the bracket protrusion 24.4 projects. The opening of the housing 2 accommodates the output shaft 3 and the bearing 13.

[0182] Furthermore, the figures show in particular Figure 6 that the bracket 24.1 has a fastening spring 24.5. The fastening spring 24.5 is applied on the inside at the housing 30, whereby the bracket 24.1 is clamped between the housing 30 and the housing 2.

[0183] The sensor receptacle device 24, in particular the bracket 24.1, has a bracket clip 24.3 (seeFigure 7 and Figure 8 By means of the bracket clip 24.3, the sensor circuit board 24.2 is fastened at the bracket 24.1.

[0184] In particular, Figure 11 Illustration: The housing 30 has a fastening tab 30.1. By means of the fastening tab 30.1, the housing 30 can be fastened, in particular screwed, at the mounting plate 50. Furthermore, Figure 11 Illustration: The housing 30 has at least one bracket receptacle 30.2 on the inside. The bracket 24.1 projects into the bracket receptacle 30.2. Here, in particular, it is proposed that in the region of the bracket receptacle 30.2 there is a recess 30.3 which does not have a fastening tab 30.1. Thereby it is ensured that when the housing 30 is placed, the fastening tab 30.1 does not constitute an obstacle for the bracket 24.1. The bracket 24.1 rests against the mounting plate and is thereby positioned. It is likewise conceivable that the bracket 24.1 rests at least partially against the bracket receptacle 30.2. Thereby it can be ensured that a torsion stop is achieved.

[0185] Figure 12 Alternative fastening of the sensor 23 is illustrated. Here, the sensor 23 is likewise provided at the sensor circuit board 24.2. The bracket 24.1 accommodates the sensor circuit board 24.2. However, the bracket 24.1 is designed in such a way that it can be fastened, in particular screwed, directly on the mounting plate 50. Thereby it is also possible to fasten the sensor 23 directly at the end side of the output shaft 3 and thereby directly at the sender 21.

[0186] The actual rotation angle 11 determined by the sensor unit 20 can be used by the evaluation unit 101 in order to carry out at least one of the following different safety-relevant evaluations. Preferably, several or all of the following safety-relevant evaluations are carried out.

[0187] On the one hand, the evaluation unit 101 can determine a closing time. For this, the evaluation unit 101 determines how long the actual rotation angle 11 changes along the closing-rotation direction 12 until the closing-rotation angle 10 is finally reached. For this, the evaluation unit 101 can detect the closing time by means of an electronic timer. If the detected closing time deviates from a saved time limit value or from several saved time limit values, a corresponding notification of the evaluation unit 101 is issued. For example, the notification is sent to the external unit 102.

[0188] As further safety-related monitoring, the evaluation unit 101 monitors how long the door is open in that the evaluation unit 101 checks the actual rotation angle 11 periodically. If the actual rotation angle 11 has moved from the closed-rotation angle 10 into the first angle range 8, the door has been opened. Now, the evaluation unit 101 starts a timer and measures the door-open duration. If the next actual rotation angle 11 received by the evaluation unit 101 continues to be in the first angle range 8, the evaluation unit 101 keeps the timer running. When the door is in the open for longer than a preset time duration value, the evaluation unit 101 generates a notification. For example, a maximum time duration value for which the door is allowed to be open can be saved in the memory of the evaluation unit 101. If the time duration value is exceeded, the evaluation unit 101 generates a notification. For example, the notification is sent to the external unit 102.

[0189] As further safety-related monitoring, the evaluation unit 101 monitors whether the lever device 103 is functioning properly. For this purpose, the evaluation unit 101 compares the actual rotation angle 11 with the closed-rotation angle 10. If the actual rotation angle 11 is in the second rotation angle range 9, a notification is generated by the evaluation unit 101. Conversely, if the comparison results in the actual rotation angle 11 being outside the second rotation angle range 9, the notification is cancelled. For example, the notification is sent to the external unit 102.

[0190] The external unit 102 can display the notification as readable text on a screen, for example. Additionally or alternatively, the external unit 102 can generate an acoustic and / or visual and / or haptic alarm.

[0191] For example, the closed-rotation angle 10 can be related to the thickness of the door 200.

[0192] The value of the closed-rotation angle 10 can be determined at commissioning. For this purpose, the evaluation unit 101 or the external unit 102 is in a commissioning mode. By direct or indirect input, the installer can be informed that the door 200 is closed. Then, the evaluation unit 101 and / or the external unit 102 can adopt the current, measured actual rotation angle 11 as the closed-rotation angle 10. Thus, the closed-rotation angle 10 can be learned.

[0193] Alternatively, the installer can determine the respective closed-rotation angle 10 depending on the assembly situation. For this purpose, for example, there can be a table in which the closed-rotation angle 10 is specified for different door thicknesses or for different door and / or door frame geometries. The installer can input the door thickness or the closed-rotation angle 10, for example, via input at the external unit 102.

[0194] In a further alternative, the closed-rotation angle 10 is fixedly preset.

[0195] according to Figure 13 The outer casing 30 has two opposing end walls 31. The end walls 31 are connected to each other via two opposing side walls 32. In particular, the two end walls 31 and the two side walls 32 together form the base of the outer casing 30. The base of the outer casing 30 can be closed by means of a cover 33.

[0196] Figure 13 The removed cover 33 is shown. It can be clearly seen here that the described bracket receiving portion 30.2 is double-constructed on the inner side at one of the two side walls 32. This double-construction embodiment of the bracket receiving portion 30.2 is particularly applicable when the housing 2 is alternating between the left side configuration A and the right side configuration B, as this is according to… Figure 19 This will be explained in more detail later.

[0197] Similarly applicable Figure 13 The shaft clearance 34 shown is illustrated. In the illustrated view, the shaft clearance 34 on the left is used to connect the lever device 103 to the output shaft 3. A similar shaft clearance 34 is also provided on the right side of the illustrated housing 30, which can be closed, for example, by a non-perforated cover (not shown) or can be removed.

[0198] also, Figure 13 The previously mentioned module 40 is shown within the housing 30. This module 40—due to the selective left-side arrangement A and right-side arrangement B of the housing 2—can also be disposed on both sides of the housing 30. Therefore, Figure 13 Module receiving portions 35 are shown at the two end walls 31 of the housing 30. According to... Figure 13 In the view, the module housing 35 on the right is used.

[0199] The module receiving portion 35 has a module slot 35.1 and a module clip 35.2. As will still be described, the module 40 includes a module circuit board 43. This module circuit board can be inserted into the module slot 35.1 and can be secured, particularly firmly screwed, by means of the module clip 35.2. Alternatively (see...) Figure 18 Module 40 is securely screwed onto mounting plate 50. In this alternative, module slot 35.1 and module clip 35.2 can be omitted.

[0200] Module 40 has a housing assembly 41. According to... Figures 13 to 15 The housing assembly 41 includes an inner housing 41.1 and an outer housing 41.2. The inner housing 41.1 is used to directly house the battery 42. The inner housing 41.1 is disposed within the outer housing 41.2. The outer housing 41.2 is fastened to the module circuit board 43 and additionally supported relative to the mounting plate 50 via a spacer retainer 41.3.

[0201] The spacer 41.3 ensures the distance 41.4 between module 40 and mounting plate 50 (see [reference]).Figure 14 ). This distance 41.4 can prove to be advantageous in case of a fire situation when the mounting plate 50 is warmed up via the door 200, since no heat is directly transferred onto the module 40, and thus onto the battery 42, by said distance 41.4.

[0202] Figure 16 and Figure 17 A variant of the module 40 is shown. Here, the housing means 41 have only an inner housing 41.1. The inner housing 41.1 serves to directly accommodate the battery 42. The inner housing 41.1 is fastened at the module circuit board 43. Here, too, the distance 41.4 is adhered to (cf. Fig. 4). Figure 17 ).

[0203] Figure 18 A variant of the fastening of the module 40 at the mounting plate 50 is shown. Here, the housing means 41 are fastened at the mounting plate 50 by means of housing fastening means 45, for example screws. Here, too, the module accommodation 35 can be dispensed with. The fastening of the module 40 by means of the housing fastening means 45 is preferably possible on both sides of the mounting plate 50 due to the optional left-side arrangement A and right-side arrangement B of the housing 2.

[0204] In all shown variants, the module 40 can be loosened without damage. For tool-free loosening, the module clip 35.2 can be correspondingly large for manual operation. The housing fastening means 45 can also be loosened tool-free, for example by means of wing screws.

[0205] As shown purely schematically in Figure 14 and Figure 17 , Figure 18 , the data transmission unit 44 can be located in the module 40, for example in or on the module circuit board 43.

[0206] At the housing 2, two halves can be defined, wherein a first half is assigned to the first end side 2.1 and a second half is assigned to the second end side 2.2. The output shaft 3 is located in the first half closer to the first end side 2.1 than to the second end side 2.2. The energy store 4 is at least partially located in the second half closer to the second end side 2.2 than to the first end side 2.1.

[0207] As illustrated in particular, for example, in the overview Figure 1 and Figure 3 , the first end side 2.1 faces at least one hinge 201 of the door 200. Correspondingly, the second end side 2.2 faces the main closing edge 203 of the door 200.

[0208] Figure 19 The above-mentioned left-side arrangement A of the housing 2 and the right-side arrangement B of the housing 2 are illustrated in detail. In Figure 19In the four views, the components are successively concealed in order to show the complete configuration easily and understandably.

[0209] For an overview, Figure 19 The two settings A, B are each shown separately; it is well understood that only one of these two settings is always applied at the door 200. For orientation, Figure 19 The first view in Figure 1 also shows the hinge 201 of the door 200. The hinge 201 is always provided at the first end side 2.1 of the housing 2, thus at the half of the housing 2 having the output shaft 3.

[0210] Figure 19 In principle, the module 40 is arranged on the mounting plate 50 next to the second end side 2.2 of the housing 2. When changing between the left-hand setting A and the right-hand setting B, the mounting plate 50 is not turned. Only the housing 2 is turned, so that the first end side 2.1 and the second end side 2.2 change their left-hand / right-hand orientation. Here, the mounting plate 50, in particular together with its fastening elements 51, is configured in such a way that the housing 2 can be fastened on the mounting plate 50 not only in the left-hand setting A but also in the right-hand setting B, so that the module 40 is always in place next to the second end side 2.2.

[0211] As is shown, for example, in Figure 1 Figure 19 The mounting plate 50 can have an orientation indication 52, for example in the form of an arrow. This orientation indication 52 indicates in which orientation the mounting plate 50 must be fastened. Figure 19 The last view in Figure 1 illustrates that the orientation indication 52 is oriented identically not only in the left-hand setting A but also in the right-hand setting B, from which it follows that the mounting plate 50 does not have to be turned.

[0212] List of reference signs

[0213] 1 door closer

[0214] 2 housing

[0215] 2.1 first end side

[0216] 2.2 second end side

[0217] 2.3 opening

[0218] 2.4 inner face

[0219] 3 output shaft

[0220] 3.1 polygon

[0221] 3.2 fastening device receptacle

[0222] 3.3 rotation axis of the output shaft

[0223] 4 energy store

[0224] 5 transmission unit

[0225] 5.1 cam

[0226] 5.2 door closing piston

[0227] 5.3 door closing piston roller

[0228] 5.4 side face

[0229] 5.5 recess

[0230] 6 damping piston

[0231] 7 damping piston roller

[0232] 8 first angle range

[0233] 9 second angle range

[0234] 10 closing-rotation angle

[0235] 11 actual rotation angle

[0236] 12 closing-rotation direction

[0237] 13 bearing

[0238] 14 bearing closure as component of housing

[0239] 20 sensor unit

[0240] 21 sender

[0241] 22 sender fastening means

[0242] 22.1 fastening head

[0243] 22.2 edge

[0244] 22.3 form-fitting element

[0245] 22.4 tool engagement

[0246] 23 sensor

[0247] 24 sensor housing

[0248] 24.1 holder

[0249] 24.2 sensor circuit board

[0250] 24.3 holder clip

[0251] 24.4 holder protrusion

[0252] 24.5 fastening spring

[0253] 30 housing

[0254] 30.1 fastening tab

[0255] 30.2 holder receptacle

[0256] 30.3 recess

[0257] 31 end wall

[0258] 32 side wall

[0259] 33 cover

[0260] 34 shaft recess

[0261] 35 module receptacle

[0262] 35.1 module slot

[0263] 35.2 module clip

[0264] 40 module

[0265] 41 housing device

[0266] 41.1 inner housing

[0267] 41.2 outer housing

[0268] 41.3 spacer

[0269] 41.4 distance

[0270] 42 battery

[0271] 43 module circuit board

[0272] 44 data transmission unit

[0273] 45 housing fastening device

[0274] 46 opening

[0275] 50 mounting plate

[0276] 51 fastening element

[0277] 52 orientation indication

[0278] 100 monitoring system

[0279] 101 evaluation unit

[0280] 102 external unit

[0281] 103 lever device

[0282] 104 lever

[0283] 105 slide rail

[0284] 200 door

[0285] 201 hinge

[0286] 202 wall (door frame)

[0287] 203 main closing edge

[0288] A left side of the housing is provided

[0289] B right side of the housing

Claims

1. A door closer (1) for closing a door (200), the door closer having • a housing (2) and an output shaft (3) supported in the housing, which constitutes an output shaft for a lever device (103) to be fastened; • a mechanical energy store (4) in the housing (2), which loads the output shaft (3) to rotate, wherein the energy store (4) is preferably constituted by a spring; • a sensor unit (20) comprising a sensor (23) and a transmitter (21), • wherein the transmitter (21) is arranged or constituted at the output shaft (3), • wherein the sensor (23) is constituted and arranged to identify the transmitter (21), in particular contactlessly, wherein the sensor (23) is arranged at a sensor accommodation device (24), wherein the sensor accommodation device (24) comprises a holder (24.1), wherein the holder (24.1) abuts at the housing (1) in the direction of an axis of rotation (3.3) of the output shaft (3).

2. The door closer (1) according to claim 1, wherein the sensor accommodation device (24) positions the sensor (23) at an end side of the output shaft (3).

3. The door closer (1) according to any one of the preceding claims, wherein the axis of rotation (3.3) of the output shaft (3) passes through the sensor (23) and / or the transmitter (21), preferably wherein the sensor (23) is arranged symmetrically with respect to the axis of rotation (3.3), and / or preferably wherein the transmitter (21) is arranged symmetrically with respect to the axis of rotation (3.3).

4. The door closer (1) according to any one of claims 1 to 3, the door closer comprising a mounting plate (50), on which the housing (2) of the door closer (1) can be fastened, wherein the holder (24.1) is fastened at the same mounting plate (50).

5. The door closer (1) according to any one of claims 1 to 4, wherein the holder (24.1) abuts and / or is fastened at the housing (2) of the door closer (1), in particular wherein the holder (24.1) surrounds the output shaft (3) by means of a preferably ring-shaped holder protrusion (24.4) and abuts and / or is fastened at the housing (2) by means of the holder protrusion (24.4).

6. The door closer (1) according to any one of claims 1 to 5, wherein the holder (24.1) abuts at a bearing closure (14) and / or the holder (24.1) abuts at an inner face (2.4) of an opening (2.3) of the housing (2).

7. The door closer (1) according to any one of claims 1 to 6, the door closer comprising a housing (30), which covers the housing (2) of the door closer (1), wherein the holder (24.1) abuts at the housing (30); preferably wherein the holder (24.1) is clamped between housing (30) and housing (2).

8. The door closer (1) according to any one of claims 1 to 7, ​ ​ ​ wherein the sensor accommodation (24) comprises at least one tension spring (24.5), in particular as an integral part of the holder (24.1), in order to place the clamped-in holder (24.1) under pretension.

9. Door closer (1) according to any of the claims 1 to 8, wherein the housing (30) comprises at least one holder accommodation (30.2) for the holder (24.1), preferably wherein the housing (30) comprises a fastening tab (30.1) and the fastening tab (30.1) is left free at the holder accommodation (30.2) for inserting the holder (24.1).

10. Door closer (1) according to any of the preceding claims, wherein the sensor unit (20) is designed for detecting the actual angle of rotation (11) of the output shaft (3), preferably wherein the sensor (23) is designed and arranged for contactless detection of the position and / or in particular the rotation and / or acceleration of the transmitter (21).

11. Door closer (1) according to any of the preceding claims, wherein the transmitter (21) comprises a permanent magnet and wherein the sensor (23) is a magnetic sensor, in particular a Hall sensor.

12. Door closer (1) according to any of the preceding claims, wherein the transmitter (21) is fastened on the end side of the output shaft (3), preferably screwed.

13. Door closer (1) according to any of the preceding claims, wherein the output shaft (3) is exposed on two opposite sides of the housing (2), wherein a first side of the output shaft is used for fastening the lever device (103), wherein the transmitter (21) is fastened on a second side of the output shaft (3).

14. Door closer (1) according to any of the preceding claims, wherein the output shaft (3) comprises fastening device accommodations (3.2) on both sides, wherein the two fastening device accommodations (3.2) are suitable for fastening fastening elements for fastening the lever device (103) at the output shaft (3), wherein a transmitter fastening device (22) is fastened in one of the fastening device accommodations (3.2).

15. Monitoring system (100) with a door closer (1) according to any of the preceding claims and an evaluation unit (101), wherein the evaluation unit (101) is designed to monitor and / or determine the closing time and / or to monitor how long the door (200) is open.

Images