DRIVE FOR ONE WING

Description

[0001] The invention relates to a drive for a leaf, in particular a door, a window or a gate.

[0002] In conventional drives of this type, incremental encoders or potentiometers are usually used to detect the respective sash opening angle. These sensors are usually located on the drive unit, for example, the hydraulic drive unit. Particularly in cases where the drive unit is mounted on the sash and its output shaft is connected to a rod supported on a fixed frame or a sliding arm guided in a slide rail provided on the fixed frame, a cable transition is often required to transmit the received data to the building network. In addition, arranging the sensors on the drive, for example, intended as a door closer, is often difficult or expensive due to space constraints.

[0003] A drive for a wing according to the preamble of claim 1 is known from DE 102 59 925 A1.

[0004] The invention is based on the object of providing a drive of the type mentioned above that eliminates the aforementioned problems. In particular, the aim is to ensure that the respective sash opening angle can be detected as simply and cost-effectively as possible. Furthermore, a cable transition is to be eliminated, particularly when the drive unit is mounted on the sash.

[0005] According to the invention, this object is achieved by a drive having the features of claim 1. Preferred embodiments of the drive according to the invention emerge from the subclaims, the present description and the drawing.

[0006] The drive according to the invention for a leaf, in particular a door, a window or a gate, comprises a drive unit which can be attached to the leaf or a fixed frame and has an output shaft which is connected in a rotationally fixed manner to one of the two ends of a sliding arm which is provided at its other end with a sliding block which is guided in a slide rail which can be attached to the fixed frame or to the leaf. The sliding block has, on at least one side facing the guide surface of the slide rail extending along the slide rail, preferably in a corresponding recess, at least one pressure element which is resiliently preloaded against the guide surface. In addition, the sliding block can be magnetized or provided with a permanent magnet. On the guide surface in question, at least one pressure element which extends in the longitudinal direction of the slide rail orA pressure-sensitive sensor strip is provided which extends in the direction of displacement of the sliding block and can be acted upon by the spring-loaded pressure element or additionally by the magnetic field generated by the additionally magnetized sliding block or the additional permanent magnet, and which optionally also reacts to a magnetic field or magnetic changes, and which is operatively connected to an evaluation unit for determining the respective position of the sliding block relative to the slide rail on the basis of the pressure exerted on the pressure-sensitive sensor strip via its spring-loaded pressure element and optionally additionally on the basis of the reaction of the sensor strip caused by the additionally magnetized sliding block or the additional permanent magnet.The signals recorded by the evaluation unit allow the respective wing opening angle to be determined via the determined position of the sliding block relative to the slide rail and the known geometric conditions.

[0007] The solution according to the invention achieves a structurally very simple and correspondingly cost-effective detection of a respective sash opening angle. Especially with a drive unit arranged on the sash, a cable transition can be eliminated. The special recess in the sliding block prevents the sensor strip from being damaged by actuating forces. In an equally advantageous alternative embodiment, the recess can be formed in the slide rail, and the sensor strip can be arranged in the recess of the slide rail, protected from the sliding block. The sliding block can then be designed without a recess.

[0008] This ensures that only the pressure element is in contact with the sensor strip. Damage to the sensor strip is also prevented by the additional contactless application of the magnetic field generated by the additionally magnetized sliding block or the additional permanent magnet. As the position of the sliding block changes, the application of the pressure element or the magnetic field generated by the additionally magnetized sliding block or the additional permanent magnet changes the output signal of the sensor strip, such as the resistance, voltage, or similar, which enables the position of the sliding block relative to the slide rail to be determined.A sensor strip that is pressure-sensitive and, if necessary, also reacts to magnetic changes ensures particularly accurate and reliable determination of the position of the sliding block and thus particularly accurate and reliable determination of the respective wing opening angle.

[0009] A respective guide surface can be formed, among other things, by an upper, lateral or inner surface of the slide rail provided on a web.

[0010] Advantageously, the pressure-sensitive sensor strip, which optionally also reacts to magnetic changes, extends continuously over essentially the entire travel path of the sliding block. This allows for continuous determination of the respective sliding block position relative to the slide rail over the entire travel path of the sliding block and, accordingly, continuous determination of the respective sash opening angle over essentially the entire opening angle range of the sash.

[0011] According to a preferred practical embodiment, a respective sensor strip is designed as a pressure-sensitive foil potentiometer which optionally also reacts to a magnetic field or magnetic changes and which changes its local voltage under the action of pressure and optionally additionally a magnetic field or magnetic changes.

[0012] A foil potentiometer consists of several layers of foil that are insulated from each other by a spacer. A resistance layer is applied to one of the foils, for example, using a screen-printing process. The overlying foil, the collector foil, has a highly conductive coating. By applying pressure and / or by applying the magnetic field of the sliding block's permanent magnet to a foil containing iron, for example, neighboring foils can be brought into contact with each other, allowing the respective local voltage to be tapped, just like on a conventional potentiometer. The difference to conventional potentiometers is that no sliding contact is required to contact the resistance track when subjected to a magnetic load, so that wear is virtually non-existent.

[0013] The permanent magnet is conveniently arranged in a bore of the sliding piece.

[0014] In particular, to detect vandalism and / or an overload and / or the closing force of the drive, a force sensor strip extending at least partially in the longitudinal direction of the slide rail or in the displacement direction of the slide block can be provided on at least one, preferably two, opposing guide surfaces of the slide rail on which the slide block is guided. A force sensor arranged between the slide block and the slide rail can detect the actuation forces exerted by the slide block on the slide rail, thereby detecting the presence of an overload and / or vandalism.

[0015] To ensure sufficient pressure is applied to each sensor strip, according to a further preferred embodiment of the drive according to the invention, at least one pressure element of the sliding block, which is resiliently preloaded against a guide surface of the linear rail, is designed as a spring nose. This ensures that the sliding block not only contacts a respective sensor strip provided on the respective guide surface, but also exerts sufficient pressure on the sensor strip to determine its position.

[0016] An element injection-moulded onto the sliding block base body can advantageously be provided as the respective spring nose.

[0017] Preferably, each spring nose comprises a spring arm connected at one end to the sliding block body and provided at the opposite free end with a bead, for example rounded, towards the respective sensor strip.

[0018] In order to ensure as little friction as possible between the pressure element of the sliding block preloaded against a guide surface of the slide rail and the guide surface or a respective sensor strip, according to an alternative advantageous embodiment the pressure element can also be provided with at least one rotatable pressure roller engaging with the sensor strip.

[0019] A further advantageous embodiment of the drive according to the invention is characterized in that a respective pressure element of the sliding block, which is resiliently preloaded against a guide surface of the slide rail, comprises a pressure piece which is displaceably arranged in a bore of the sliding block and preloaded by a spring element in the direction of the guide surface of the slide rail.

[0020] Preferably, the preload exerted on the pressure piece via the spring element is adjustable via an adjusting screw acting on the spring element.

[0021] In particular for measuring occurring pressure forces, it is also advantageous in certain cases if at least one pressure roller is provided which is rotatably mounted directly on the slider body.

[0022] The drive can in particular be designed as a door closer.

[0023] The invention is explained in more detail below using exemplary embodiments with reference to the drawing, in which: Fig. 1 a schematic perspective partial view of the slide rail with the sliding block provided therein of an exemplary embodiment of a drive according to the invention from an end face of the slide rail, Fig. 2 a schematic perspective view of the slide rail of the drive according to Fig. 1obliquely from above, whereby a part of the sliding arm connected to the sliding block can also be seen, Fig. 3 various exemplary embodiments of the sliding arm in the slide rail of the drive according to Fig. 1 guided sliding block, Fig. 4 an enlarged front view of the slide rail according to the Fig. 1 and 2 with a sliding block provided therein, in which the recess of the sliding block provided for the pressure element can be seen more clearly and an arrow indicates a direction of force in which the sliding block is supported on a guide surface when the drive is actuated accordingly, and Fig. 5a with the Fig. 4 comparable front view of the slide rail according to the Fig. 1 and 2 with a sliding block provided therein, whereby the sliding block is supported on an opposite guide surface as a result of a reverse operation of the drive.

[0024] The Fig. 1 and 2show an exemplary embodiment of a drive 10 according to the invention for a wing.

[0025] The drive 10 comprises a drive unit (not shown here) which can be attached to the sash or a fixed frame and which has an output shaft which is connected in a rotationally fixed manner to one of the two ends of a sliding arm 12 which is provided at its other end with a sliding block 14 which is guided in a sliding rail 16 which can be attached to the fixed frame or to the sash.

[0026] As can be seen in particular from the Fig. 3 to 5 As can be seen, the sliding block 14 has at least one guide surface 18 extending along the slide rail 16 facing the slide rail 16, in a corresponding recess 26 (cf. in particular the Figs. 4 and 5) at least one pressure element 20 resiliently preloaded against the guide surface 18. In addition, a pressure-sensitive sensor strip 22 extending at least in sections in the longitudinal direction of the slide rail 16 or in the displacement direction of the sliding block 14 and acted upon by the resiliently preloaded pressure element 20 is provided on the relevant guide surface 18, which is connected to an evaluation unit 24 for determining the respective position of the sliding block 14 relative to the slide rail 16 on the basis of the pressure exerted by the sliding block 14 via its resiliently preloaded pressure element 20 on the pressure-sensitive sensor strip 22.

[0027] Since the sliding block 14 is provided with the recess 26 in the area opposite the sensor strip 22, which has the spring-loaded pressure element 20, no direct actuation forces can be transmitted to the sensor strip 22, thus protecting the sensor strip 22 from damage. Only the pressure element 20 is in contact with the sensor strip 22.

[0028] Additionally, the sliding block 14 can also be magnetized or provided with a permanent magnet, and the sensor strip 22 can react to a magnetic field or magnetic changes, so that the position of the sliding block 14 can also be determined based on the respective exposure of the sensor strip 22, which reacts to a magnetic field or magnetic changes, to the magnetic field generated by the magnetized sliding block 14 or the permanent magnet. The permanent magnet can be arranged in a bore of the sliding block.

[0029] A respective wing opening angle can be determined by the evaluation unit 24 via the respectively determined position of the sliding block 14 relative to the slide rail 16 on the basis of the known geometric conditions, in particular the length of the sliding arm 12 and the distance from its point of application on the wing or frame to the axis of rotation of the door.

[0030] As can be seen in particular from the Fig. 2As can be seen, the pressure-sensitive and / or magnetic field or magnetic change-responsive sensor strip 22 extends continuously over substantially the entire travel path of the sliding block 14 in the illustrated embodiment. This enables a continuous determination of the respective position of the sliding block 14 relative to the slide rail 16 over substantially the entire travel path of the sliding block 14 and thus a continuous determination of the respective wing opening angle over substantially the entire opening angle range of the wing.

[0031] With the position of the sliding block 14, the output signal, such as the resistance, the voltage or the like, of a respective sensor strip 22 changes, so that the position of the sliding block 14 relative to the slide rail 16 and thus the respective wing opening angle can finally be calculated by means of the evaluation unit 24.

[0032] A respective sensor strip 22 can, for example, be designed as a foil potentiometer which changes its local voltage under the influence of pressure or a magnetic field or magnetic changes.

[0033] A foil potentiometer consists of several foil layers that are insulated from each other by a spacer. A resistance layer is applied to one of the foils, for example, using a screen-printing process. A highly conductive coating is applied to an overlying collector foil. By applying pressure or by applying the magnetic field of the magnetized sliding block 16 or the permanent magnet of the sliding block 16 to a foil containing iron, for example, neighboring foils can be brought into contact with each other, allowing the respective local voltage to be tapped, as with a conventional potentiometer.

[0034] Fig. 3shows various exemplary design variants of the sliding block 14 guided in the slide rail 16 of the drive 10.

[0035] In the embodiment according to Fig. 3a ) the pressure element 20 of the sliding block 14, which is resiliently preloaded against a guide surface 18 of the slide rail 16, is designed as a spring nose 30. This ensures that the sliding block 14 not only touches a respective sensor strip 22 provided on the respective guide surface 18, but also exerts sufficient pressure on it.

[0036] The spring nose 30 can be designed, in particular, as an element molded onto the sliding block base body using an injection molding process. However, this spring nose 30 can also be realized, for example, as an element made of spring steel or the like and arranged on the sliding block base body. As can be seen from Fig. 3a), the spring nose in the present case comprises a spring arm 30" which is connected at one end to the sliding block body and at the opposite free end is provided with a bead 30' rounded towards the relevant guide surface 18.

[0037] Even in the embodiment according to Fig. 3b ), the pressure element 20 of the sliding block 14, which is resiliently preloaded against a guide surface 18 of the slide rail 16, again comprises a spring arm 34 connected at one end to the sliding block base body. In the present case, however, the opposite free end of the spring arm is not provided with a bead, but with a rotatable pressure roller 32 which engages with the relevant guide surface 18 or a respective sensor strip 22.

[0038] In the embodiment according to Fig. 3c) comprises a pressure element 20 of the sliding block 14 which is resiliently preloaded against a guide surface 18 of the slide rail 16 and a pressure piece 40 which is displaceably arranged in a bore 36 of the sliding block 14 and preloaded in the direction of the guide surface 18 of the slide rail 16 via a spring element 38. The preload exerted on the pressure piece 40 via the spring element 38 can be adjustable, as shown, for example via an adjusting screw 42 which acts on the spring element 38.

[0039] In Fig. 4 the slide rail 16 is in accordance with the Fig. 1 and 2with the sliding block 14 provided therein, is shown again in an enlarged front view, in which the recess 26 of the sliding block 14 provided for the pressure element 20 can be seen more clearly. In addition, an arrow indicates a direction of force in which the sliding block 14 is supported on a guide surface 18 upon corresponding actuation of the drive. In an alternative embodiment, the recess 26 can be formed in the slide rail 16, and the sensor strip 22 can be arranged in the recess 26 of the slide rail 16, protected from the sliding block 14. The sliding block 14 can then be designed without the recess 26.

[0040] Fig. 5 shows one with the Fig. 4 comparable front view of the slide rail 16 according to the Fig. 1 and 2 with a sliding block 14 provided therein, whereby the sliding block 14 is supported on an opposite guide surface 18 as a result of a reverse actuation of the drive.

[0041] In particular, to detect vandalism and / or an overload and / or the closing force of the drive 10, a force sensor strip extending at least partially in the longitudinal direction of the slide rail 16 or in the displacement direction of the slide block 14 can be provided on at least one, preferably two, opposing guide surfaces 18 of the slide rail 16, on which the slide block 14 is guided. The actuating forces exerted by the slide block 14 on the slide rail 16 can be detected by a force sensor arranged between the slide block 14 and the slide rail 16.

[0042] The drive 10 can, for example, be designed as a door closer.

[0043] The drive 10 according to the invention enables a simple and cost-effective detection of a particular sash opening angle. Furthermore, with the drive unit mounted on the sash, a respective cable transition is eliminated. List of reference symbols

[0044] 10Drive 12Sliding arm 14Sliding block 16Sliding rail 18Guide surface 20Pressure element 22Sensor strip 24Evaluation unit 26Recess 30Spring nose 30'Bead 30"Spring arm 32Pressure roller 34Spring arm 36Bore 38Spring element 40Pressure piece 42Set screw

Claims

1. Drive (10) for a leaf, in particular of a door, a window or a gate, with a drive unit which can be attached to the leaf or a fixed frame and has an output shaft which is connected fixedly to one of the two ends of a sliding arm (12) so as to rotate with it, which is provided with a sliding block (14) at its other end which is guided in a sliding rail (16) that can be attached to the fixed frame or to the leaf, characterized in that the sliding block (14) has at least one pressure element (20) spring-preloaded against the guide surface (18) on at least one side facing the guide surface (18), extending along the sliding rail (16), of the sliding rail (16), preferably in a corresponding clearance (26), and at least one pressure-sensitive sensor strip (22), extending in the longitudinal direction of the sliding rail (16) or in the displacement direction of the sliding block (14), which can be loaded by the spring-preloaded pressure element (20) is provided at least in sections on the relevant guide surface (18), which sensor strip is operatively connected to an evaluation unit (24) in order to determine the respective position of the sliding block (14) relative to the sliding rail (16) on the basis of the pressure exerted on the pressure-sensitive sensor strip (22) via its spring-preloaded pressure element (20).

2. Drive according to Claim 1, characterized in that the pressure-sensitive sensor strip (22) extends continuously over at least substantially the entire travel path of the sliding block (14).

3. Drive according to either of the preceding claims, characterized in that a respective sensor strip (22) is designed as a pressure-sensitive film potentiometer which changes its local voltage under the influence of pressure.

4. Drive according to one of the preceding claims, characterized in that, in particular in order to determine vandalism and / or an overload and / or the closing force of the drive (10) on at least one, preferably on two opposing guide surfaces (18) of the sliding rail (16), on which the sliding block (16) is guided, in each case one force sensor strip extending at least in sections in the longitudinal direction of the sliding rail (16) or in the displacement direction of the sliding block (14) is provided.

5. Drive according to one of the preceding claims, characterized in that at least one pressure element (20) of the sliding block (14), which is spring-preloaded against a guide surface (18) of the sliding rail (16), is designed as a spring lug.

6. Drive according to Claim 5, characterized in that the spring lug (30) is formed as an element moulded onto the sliding block base body using the injection moulding process.

7. Drive according to Claim 5, characterized in that the spring lug (30) is formed as an element which is manufactured from spring steel or the like and is arranged on the sliding block base body.

8. Drive according to one of the preceding claims, characterized in that at least one pressure element (20) of the sliding block (14), which is spring-preloaded against a guide surface (18) of the sliding rail (16), is provided with at least one rotating pressure roller (32) which engages with the sensor strip (22).

9. Drive according to one of Claims 1 to 5, characterized in that a respective pressure element (20) of the sliding block (14), which is spring-preloaded against a guide surface (18) of the sliding rail (16), comprises a pressure piece (40) which is arranged displaceably in a hole (36) of the sliding block (14) and is preloaded via a spring element (38) in the direction of the guide surface (18) of the sliding rail (16).

10. Drive according to Claim 9, characterized in that the preload exerted on the pressure piece (40) via the spring element (38) can be adjusted by means of an adjusting screw (42) which loads the spring element (38).

11. Drive according to one of the preceding claims, characterized in that, in particular in order to measure pressure forces that occur, at least one pressure roller is rotatably mounted directly on the sliding element body.

12. Drive according to one of the preceding claims, characterized in that the drive (10) is designed as a door closer.