Door system

Abstract

The invention relates to a door system, an elevator, and a method for opening a door system. The door system comprises at least one set of shaft doors, one set of cabin doors, a cabin door drive, and a door coupling for coupling the cabin doors to the shaft doors. The set of cabin doors comprises an electrically activatable cabin door locking means, by means of which the set of cabin doors can be locked and unlocked in the closed position. The first part of the door coupling comprises a contact element, wherein the contact element has a length measurement in a longitudinal direction, which length measurement is greater than the guide flange spacing. The contact element has a width measurement in a width direction, which width measurement is smaller than the guide flange spacing. The contact element is arranged on the set of cabin doors so as to be rotatable between the first guide flange and the second guide flange. A lever is connected to the drive means and the lever is rigidly connected to the contact element, so that, by means of moving the drive means from an uncoupled position, in which, owing to the width measurement, the contact element is arranged with clearance between the first and the second guide flange, into a coupling position, in which the contact element contacts the first and the second guide flange.

Description

[0001] door system

[0002] The present invention relates to a door system, an elevator with the door system and a method for operating the elevator.

[0003] In an elevator, a car is typically moved vertically in a shaft between different floors or levels within a building. At the floors, passengers can enter and exit the car, or other loads to be transported can be loaded or unloaded from the car. To allow access to the car, shaft doors are located on the floor and the car has a car door. The car door comprises at least one car door leaf and the shaft door comprises at least one shaft door leaf. The car door and the shaft door together form an openable and closable passage from the car to the floor or vice versa. To ensure that the car door remains securely closed during travel, the car door has a car door lock that locks one or more car door leaves during travel.The shaft door also has a shaft door lock that keeps one or more shaft door leaves locked, at least when the car is not present.

[0004] The car door also has a drive designed to open and close the car door panels. Typically, this movement of the car door panels is transmitted to the respective shaft door panels on the approaching floor via a door coupling. For this purpose, a first part of the door coupling on the car door interacts with a second part of the door coupling on the shaft door.

[0005] US5485896A shows a simple design of a door coupling. However, this design requires a separate drive for the door coupling. This makes this solution complex to manufacture.

[0006] It can therefore be seen as a task to provide a cost-effective door system.

[0007] According to a first aspect of the invention, a door system solves the problem. The door system has at least one shaft door, one car door, a car door drive, and a door coupling for coupling the car door to the shaft door. The car door and the shaft door are movable between an open position and a closed position. The car door has an electrically activated car door lock, by which the car door can be locked and unlocked in the closed position. The shaft door has a separate electrically activated shaft door lock, by which the shaft door can be locked and unlocked in the closed position. The car door drive comprises a motor and a drive means. The car door can be moved from the closed position to an open position and back again by means of the drive means.The door coupling has a first part that is arranged on the car door and a second part that is arranged on the shaft door. The second part of the door coupling has at least a first vertically oriented guide web protruding from the shaft door and a second vertically oriented guide web protruding from the shaft door. The first and second guide webs are arranged at a guide web distance from one another. The first part of the door coupling has a contact body, wherein the contact body has a length dimension along a length direction that is greater than the guide web distance. The contact body has a width dimension along a width direction that is smaller than the guide web distance. The contact body is rotatably arranged on the car door between the first guide web and the second guide web.A lever is connected to the drive means and the lever is connected to the contact body in a rotationally fixed manner, so that the contact body can be rotated by means of a movement of the drive means from a decoupled position, in which the contact body is arranged with play between the first and the second guide web due to the width dimension, into a coupling position in which the contact body touches the first and the second guide web.

[0008] According to a second aspect of the invention, an elevator achieves this objective. The elevator comprises a door system according to the first aspect of the invention, a position-measuring device, a car, and a control device. The position-measuring device detects the position of the car. The control device evaluates the position and controls the opening and closing of the door system.

[0009] According to a third aspect of the invention, a method for operating an elevator according to the second aspect of the invention solves the problem. The method comprises the steps:

[0010] - Coupling the car door to the shaft door by the door drive moving the drive means a first distance in the direction of opening and thereby rotating the contact body until the door coupling is coupled.

[0011] - Unlocking the car door and the shaft door via an electrical signal to the car door lock and the shaft door lock.

[0012] - Opening of the car door by the door drive moving the propellant a second distance in the direction of opening and taking the shaft door with it.

[0013] Possible features and advantages of embodiments of the invention may be considered, among other things and without limiting the invention, to be based on ideas and findings described below.

[0014] The car door and the shaft door can work together to allow access from any elevator floor into the car. The shaft door also closes the shaft when necessary, preventing people from falling into the shaft. The car door also closes the car when necessary, preventing people in the car from touching the passing surfaces of the shaft during the ride.

[0015] The car door and the shaft door can be designed in different ways. The car door and the shaft door can, for example, comprise a rolling door, a folding door, a car door leaf, or a shaft door leaf. These designs can be opened vertically or horizontally.

[0016] The car door and the landing door should preferably be movable together between the open and closed positions. In particular, if the car opens the doors normally on a floor, they open together. However, it is also possible to move the doors separately in emergency situations or during service.

[0017] The door system, thanks to the combination of the electrically activated car door lock, the electrically activated shaft door lock, and the simple door coupling, offers the advantage of being very cost-effective to manufacture. The door coupling serves exclusively to couple the movement of the shaft door to the car door. This allows for a very simple design, as it does not, for example, mechanically activate a locking mechanism.

[0018] During a journey, a car is preferably moved vertically along the travel path. As soon as the car has reached a floor, i.e. when the walkable surface of the floor of the car and the walkable surface of the floor on the floor are essentially at the same height, and optionally when the car has essentially stopped, the car door is opened by the car door drive using the drive medium. The fact that the car is at the height of a floor and, optionally, that the car has essentially stopped can be determined by the position measuring device. The position measuring device determines the position and, optionally, the speed of the car along the travel path. The position measuring device transmits position measurement data to a control unit of the elevator. The control unit can be at least partially integrated into the position measuring device.The control unit can control the door drive and thus the opening and closing of the car door and the shaft door. The control unit can take into account the position measured by the position measuring device.

[0019] The longitudinal direction is the straight line between two points on the contact body that are at a maximum distance from each other, preferably in a projection onto the plane of the shaft door or car door. The width direction is parallel to the distance between two planes between which the contact body lies, so that the contact body is touched by both planes. Preferably, the two planes are also perpendicular to the car door or shaft door and vertically parallel, i.e., perpendicular to the direction of door movement, especially when the contact body is in the decoupled position.

[0020] The contact body touches the first and second guide webs in the coupling position because the longitudinal dimension along the length direction is longer than the guide web distance between the first guide web and the second guide web. Therefore, when the contact body rotates, the contact body contacts the first and second guide webs. The first part of the door coupling is arranged on the car door. The first part of the door coupling has the contact body. The length direction of the contact body is aligned vertically during travel. The width direction is preferably perpendicular to the length direction and is thus aligned horizontally in this orientation. The contact body is spaced far enough from the car door, and the first and second guide webs protrude far enough from the shaft door, that the contact body is at least partially mounted between the first guide web and the second guide web.The contact body is spaced from the shaft door, and the guide bars are spaced from the car door.

[0021] Since the width dimension is smaller than the guide bar spacing, the contact body can pass through the second part of the door coupling, in particular the first guide bar and the second guide bar, without contact. For this purpose, the contact body is preferably positioned centrally between the first guide bar and the second guide bar. This eliminates noise and impact during the car's travel when the first part of the door coupling passes through a second part of the door coupling, which is preferably attached to each shaft door.

[0022] Preferably, the first guide web is arranged parallel to the second guide web.

[0023] According to a preferred embodiment, the contact body is made of an elastomer. Elastomers can be understood, in particular, as vulcanized natural or synthetic rubber. This has the primary advantage that the coupling process is very quiet.

[0024] The first step of opening the car door involves coupling the car door and the shaft door. To couple the car door to the shaft door, the contact body is rotated by an angle of rotation. This causes the longitudinal direction of the contact body to rotate, and the contact body touches the first and second guide webs with one contact point each. This rotation is effected by the lever, which is rotationally fixedly connected to the contact body. Preferably, the contact body and the lever are designed as a single unit and, in particular, are rotatably mounted on a surface of the car door. The mounting can be implemented, for example, via a bearing pin that is attached directly to the car door or to a base attached to the car door. One end of the lever is connected to the contact body, and the other end of the lever is preferably pivotally connected to the drive means of the car door drive.To rotate the longitudinal direction from the vertical orientation to the twisted orientation, the door drive motor moves the drive element by an initial distance. The drive element is moved so far that the lever is rotated by the coupling angle, and thus the contact body is also rotated by the coupling angle. Since the contact body is firmly connected to the lever, the contact body and the lever each rotate by the same common coupling angle.

[0025] When the contact body is not yet coupled, the lever preferably extends at a lead angle from the vertical. When the contact body is coupled, the lever preferably extends essentially vertically.

[0026] The car door and the shaft door are coupled as soon as the contact body touches the first guide bar and the second guide bar.

[0027] The drive mechanism is characterized by the fact that at least parts of the drive mechanism move linearly along the door opening direction, and by the indirect coupling of the drive mechanism via the contact body and the lever to the car door, the car door is moved by the drive mechanism. The drive mechanism can be configured, for example, as a spindle drive, rack and pinion drive, scissor linkage, hydraulic cylinder, or pneumatic cylinder.

[0028] According to a preferred embodiment, the drive means is designed as a drive means rotating around a first roller and a second roller, and preferably the first roller is driven by the door drive.

[0029] Both rollers are preferably arranged on the cabin door transom. The first roller is preferably arranged near the door drive. The second roller is arranged opposite the first roller on the door transom. The drive means that runs over the roller can be a chain, a rope, a belt or a toothed belt. Preferably, the length of the contact body is rotated from the vertical direction by a coupling angle between 10° and 80° in the coupled state. More preferably, the coupling angle is between 15° and 40°. Even more preferably, the coupling angle is 30°. This has the advantage that the initial distance traveled by the drive means for coupling is short. The contact body touches the first guide web at a first contact point and the second guide web at a second contact point. The two contact points prevent further twisting of the contact body.This results in the advantageous effect that, when the door is subsequently opened, a force applied by a door closing device increases or at least maintains the contact force at the contact points between the contact body and the guide bars. As a result, all elements, from the car door drive motor to the drive fluid, the contact body, the guide bars, and the shaft door closing device, are braced against each other. They are thus pressed against each other, so that the motor's movement is transmitted to the car door and the shaft door without any play.

[0030] The coupling angle can be the same as the lead angle. In this case, the lever is essentially vertical in the coupled position.

[0031] Alternatively, the coupling angle can be between 70° and 110°, or preferably 90°. For this purpose, the contact body or the lever has a stop that prevents further rotation after the coupling angle is reached. Furthermore, in such a case, the lead angle is preferably 45°. Thus, the lever moves 90° between the coupled position, which deviates by 45° from a vertical direction, and the uncoupled position, which also deviates by 45° from a vertical direction. The coupled and uncoupled positions are therefore symmetrical to each other with respect to the vertical direction.

[0032] In the embodiment in which the longitudinal direction is rotated by approximately 90° from the vertical direction, it is particularly advantageous that the high friction of the elastomers holds the contact body in the 90° rotated position. The elastomers generate high frictional forces because the contact body is clamped between the first guide bar and the second guide bar. For this purpose, in this case, the longitudinal dimension is only slightly larger than the guide bar spacing, preferably between one per mille and 5%.

[0033] In both alternatives, the contact points now prevent any relative movement of the shaft door to the car door.

[0034] Since the car door and the shaft door are connected to each other when coupled, the shaft door lock can be opened. It is advantageous that the car door lock and the shaft door lock can be electrically activated. The power to unlock the electrically activated car door lock can be provided directly on the car by a control unit. Likewise, a control unit on the floor or in the machine room can provide the power to activate the shaft door lock. Preferably, both locks have a monitoring device that monitors the position of the locks.

[0035] The shaft door lock and the car door lock can be essentially identical in design. The electrical activation of the locks is based on the principle that a control device generates signals that cause the shaft door lock or the car door lock to open or close. Unlocking is preferably carried out directly via the power supply of a solenoid, meaning that a solenoid is preferably energized by the control device, which then opens the lock. The power can be generated directly in or on the control device. Alternatively, the control device can send a command via a bus system to an activation component, whereupon the activation component switches on the power, which then activates the solenoid.

[0036] The signal line to the shaft door lock and the signal line to the car door lock can be connected directly via a cable. Alternatively, a bus system can be used, which then sends additional status data from the shaft door lock or the car door lock back to the elevator control unit. Status data includes, for example, the status of the car door lock or the shaft door lock, data on the duration of door movements, or the power consumption of the drive.

[0037] In an advantageous embodiment, the solenoid is supplied with power, so that the lock opens when a bolt is removed from engagement with a bolt stop. As soon as the power supply is interrupted, the bolt falls back into engagement with the bolt stop, for example, by a spring or a weight biasing the bolt toward the position in engagement with the bolt stop. Furthermore, the bolt can be designed so that the lock can be locked when the power supply is switched off by moving the bolt over the bolt stop using a one-sided chamfer. It can therefore function like a snap lock.

[0038] As soon as the car door lock and the shaft door lock are open, the door drive can move the drive medium a second distance in the direction of opening. This causes the door drive to move the car door and the shaft door together into the open position. As soon as both doors have left the door lock area, the activation of the car door lock and the shaft door lock can be stopped. This saves energy.

[0039] According to a preferred embodiment, the method further comprises the step of closing the car door and the shaft door.

[0040] Moving the first car door leaf into the closed position, i.e. closing the doors, occurs in reverse. The car door lock and the shaft door lock can preferably remain deactivated if the respective latches are chamfered.

[0041] According to a preferred embodiment, the method further comprises the steps:

[0042] - Closing the car door by the car door drive moving the propellant a third distance in the direction of closing until the first car door is closed,

[0043] - Locking the car door and the shaft door and

[0044] - Uncoupling of the door clutch by the car door drive moving the drive means a fourth distance in the direction of closing.

[0045] The door drive moves the drive medium a third distance and thus closes the doors with this movement. Preferably, the movement is controlled so that when the closed position is reached, the speed of movement is very low or, preferably, the door drive stops briefly. This prevents the doors from colliding, and the doors close quietly. The locking mechanism can remain deactivated during closing. For this purpose, the car locking and the shaft locking can, for example, have a snap mechanism, preferably implemented by a chamfered bolt. The car locking and the shaft locking are preferably activated during closing to reduce the noise during locking and, for example, prevent snapping noises. Otherwise, the snap mechanism could cause a snapping noise, for example when passing the locking stop.After locking, the door drive moves the propellant a fourth distance, and the car door is decoupled from the shaft door. The car can now be safely moved along its travel path again.

[0046] The locking stop can be designed as a nose on the car door or as a recess in the car door. The locking bolt is preferably preloaded by a spring so that the bolt potentially engages the locking stop when the car door lock or shaft door lock is not activated.

[0047] According to a preferred embodiment, the car door has at least a first car door leaf and the shaft door has at least a first shaft door leaf.

[0048] The first car door leaf and / or the first shaft door leaf are fixed door leaves. Preferably, a door leaf is flat and rectangular and arranged to be movable transversely to the passage direction through the door. The first and second guide webs can be attached to the shaft door leaf. The bearing or the base serving to support the contact body can be arranged on the car door leaf.

[0049] According to a preferred embodiment, the car door has a second car door leaf, and the shaft door has a second shaft door leaf, wherein a first door coupling couples the first car door leaf to the first shaft door leaf, and in particular a second door coupling couples the second car door leaf to the second shaft door leaf. In a first alternative embodiment, the first car door leaf and the second car door leaf can be moved telescopically. The first car door leaf moves faster, in particular twice as fast, as the second car door leaf. It is advantageous here that the door coupling and the car door lock are attached to the faster-moving first door leaf. Analogously, the coupled first shaft door leaf preferably moves twice as fast as the second shaft door leaf.The movement of the second shaft door leaf is effected by a mechanism that transfers the movement of the first shaft door leaf to the second shaft door leaf, reduced by 50%.

[0050] In a second alternative embodiment, a second door coupling can couple the second car door leaf to the second shaft door leaf. This is particularly advantageous for centrally opening doors. With centrally opening doors, the door leaves open in opposite directions, away from each other. This eliminates the need for additional mechanisms, such as revolving cables, for each shaft door, which would otherwise be necessary for this coupling.

[0051] In other words, the car has a second door coupling for a second car door leaf and a second shaft door leaf.

[0052] The use of the two shaft door leaves is preferably analogous to the use of the two car door leaves.

[0053] According to a preferred embodiment, the contact body, the first guide web and the second guide web are arranged above the car door and / or above the shaft door.

[0054] Above the car door or the shaft door here means that the door coupling lies above an infinitely extended horizontal plane that lies tangentially against an upper end of the shaft door and / or the car door, and in particular an upper end of the first shaft door leaf and / or the first car door leaf. Since the door coupling is arranged above the car door leaf or the shaft door leaf, at least parts of the door coupling can be arranged vertically above the door, and less space is required between the car door and the shaft door. This allows the shaft door leaf and the car door leaf to be arranged very close to one another because, for example, the lever or a support structure for the guide webs can be arranged outside the gap between the car door and the shaft door.The shaft door and the car door are therefore positioned very close to each other, leaving more space to make the interior of the car larger.

[0055] According to a preferred embodiment, the door system has a pretensioning device which applies a pretensioning force to the contact body in the direction of the decoupled orientation.

[0056] The preload force in the decoupled orientation ensures that the contact body does not inadvertently rotate out of this orientation during travel. Such rotation could result in contact with the guide elements on a floor when passing through.

[0057] The preload force can be configured such that, for example, a torsion spring is connected to the contact body, the unstressed position of which is aligned so that the contact body is oriented along the direction of travel. Alternatively, a tension spring can be connected to the contact body such that the shortest length is achieved when the contact body is oriented along the direction of travel. Another alternative embodiment involves arranging a stop between the car door and the contact body. The lever is preloaded by a spring so that it is pressed against the stop. If the lever rests against the stop, the contact body is oriented along the direction of travel.

[0058] According to a preferred embodiment, the pretensioning device is designed as an elastomer torsion spring. Such elastomer torsion springs are marketed, for example, by Rosta as Rosta Elements. They act simultaneously as a bearing element and a return spring. According to a preferred embodiment, the first guide web and the second guide web share a common guide web base.

[0059] The common guide rail base can be a separate element, such as a guide rail support. The guide rail support determines the guide spacing. It preferably also has holes and / or threads for attaching the guide rails to the guide rail support and the guide rail support to the shaft door.

[0060] Alternatively and preferably, the common guide web base can be designed such that the first guide web, the common guide web base, and the second guide web together form one body. Preferably, they form a U-shaped profile, with the common guide web base comprising the middle part of the U-shaped profile. The U-shaped profile can be constructed such that the guide distance is fixed and therefore, in particular, cannot be changed. Furthermore, the guide web base can be used to fasten the U-shaped profile to the shaft door, for example with screws. The guide web base can also have locating holes that allow the U-shaped profile to be easily arranged and aligned in the correct position. That is, so that the contact body lies in the middle between the first guide web and the second guide web, and so that the guide webs are aligned along the travel path.

[0061] According to a preferred embodiment, a connector connects the lever to the propellant, and the connector connects a first end of the propellant to a second end of the propellant.

[0062] On the one hand, the connector closes the rotating drive element into a closed circuit, allowing the length of the drive element to be adjusted to the distance between the rollers. Furthermore, the connector preferably has a pin or a hole, which allows for an articulated connection to the lever.

[0063] According to a preferred embodiment, the door system has a

[0064] Door closing device on the landing door, where the force of the door closing device is greater than the tensile force exerted by the drive element on the lever to move the contact body into the coupling position. Door closing weights or door closing springs can be used as door closing devices.

[0065] In other words, the propellant will move the lever to move the contact body into the coupling position. The force required to do this is less than the closing force of the door locking device. This ensures that the shaft door and the car door are not opened when the coupling position is reached. It also prevents the still-locked bolt from being subjected to stress. This ensures that the bolt can be easily removed from the engagement upon activation, i.e., the locking mechanism is opened. As soon as the propellant moves the lever further, the force of the propellant exceeds the closing force, and the car door and the shaft door coupled to the car door open.If the propellant were to open the car door before the lock was released, at least one of the car doors or the shaft door would come into contact with the corresponding latch, making it impossible to open the latch due to friction. This effect can occur at the car door latch, the car door, or the shaft door latch on the shaft door.

[0066] According to an alternative embodiment, the method further comprises the step of resetting the door drive after coupling and before unlocking in order to relieve the locking mechanism.

[0067] By relieving the load on the locking mechanism, it is possible to equip the locking mechanism with a weak, and therefore cost-effective, actuator.

[0068] This is particularly advantageous if the longitudinal direction is rotated by approximately 90° from the vertical direction, and the force required on the lever is greater than the closing force of the door locking device. In this case, it ensures that the bolt is not stressed and can be opened easily.

[0069] Further advantages, features, and details of the invention will become apparent from the following description of exemplary embodiments and from the drawings, in which identical or functionally identical elements are provided with identical reference numerals. The drawings are merely schematic and not to scale.

[0070] Showing:

[0071] Fig. 1 a cabin door 21,

[0072] Fig. 2 shows a shaft door 22 matching the car door 21, Fig. 3 shows a horizontal section through the door coupling, Fig. 4 shows a view of the door coupling in the coupled position, Fig. 5 shows a view of the door coupling in the coupled position, Fig. 6 shows an elevator 100

[0073] Fig. 1 shows the car door 21 of the elevator 100. The door system 1 is designed as a telescopically opening car door 21. A first car door leaf 21a opens twice as fast as a second car door leaf 21b. The first and second car door leaves 21a, 21b are guided at the lower end along a door sill 3a. In the open state, both car door leaves 21a, 21b would be located to the right below the door drive 4. The mechanism that causes the first car door leaf 21a to move twice as fast as the second car door leaf 21b in telescopically opening doors is not shown. A door drive 4 is attached to the door jamb 2a. The door drive 4 moves a driving means 14 via a roller 5. The driving means 14 is guided over the two rollers 5, which are arranged at substantially opposite ends of the door striker 2a.A connector 15 connects the ends of the drive means 14 to one another and also establishes a connection between the drive means 14 and the lever 18. The lever 18 is connected to the contact body 13 in a rotationally fixed manner. They thus form a unit. The unit comprising the lever 18 and the contact body 13 is mounted on a bearing 51 located on the base 17. The base 17 is designed such that the base 17 and the lever 18 lie essentially vertically above and above the first car door leaf 21a. Such that essentially only the contact body 13 protrudes beyond a projection of the first car door leaf 21a in order to be able to couple with the opposite first shaft door, or the first and second guide webs attached thereto.

[0074] The first car door leaf 21a has a locking stop 34. The locking bar 33 of the car door lock 31 engages the locking stop 34 when the car door lock 31 is not activated. This locks the car door 21, and in particular the first car door leaf 21a. The car door lock 31 is activated by activating the actuator 32 of the car door lock. For this purpose, the actuator 32 can have a lifting magnet, which is energized for activation, and the lifting magnet then uses a magnetic force to lift the locking bar 33 out of engagement with the locking stop 34. The weight of the locking bar or the force of a spring can serve as the counterforce.

[0075] Fig. 2 shows the shaft door 22 which would be arranged together with the car door 21 of Fig. 1 in a door system 1. The door system 1 comprises the combination of the car door 21 as shown in Fig. 1 and the matching shaft door 22 as shown in Fig. 2. The components of the door system 1 shown in Fig. 2 are essentially reversed from the representation of similar components of the car door 21 in Fig. 1, because the shaft door shows a view from the opposite direction.

[0076] The shaft door 22 also opens telescopically. The first shaft door leaf 22a and the second shaft door leaf 22b are guided along the shaft door sill 3b and the shaft door transom 2b. The shaft door locking mechanism 41 is also constructed similarly to the car door locking mechanism. A shaft door bolt 43, when not activated, engages with a shaft bolt stop 44. The actuator 42 of the shaft door locking mechanism can be energized to lift the bolt 43 out of engagement with the bolt stop 44.

[0077] A first guide bar 11 and a second guide bar 12 are attached to the first shaft door leaf 22a. The two guide bars 11, 12 are arranged such that the contact body 13 is located between the first guide bar 11 and the second guide bar 12. The contact body 13 is shown in dashed lines because it is attached to the car door 21 and would therefore not actually be visible when looking at the shaft door 22. It therefore shows where the contact body 13 would be if the car 7 were located on the same floor. The guide bars 11, 12 are attached independently of one another to the first shaft door leaf 22a. In addition, some of the guide bars 11, 12 are attached vertically above the first shaft door leaf 22a. Only enough of the guide webs 11, 12 protrude beyond the first shaft door leaf 22a to enable coupling with the opposite contact body 13. Fig.3 shows the horizontal section through a non-activated door clutch.

[0078] The contact body 13 is spaced apart from the guide rails 11 and 12. The car can therefore pass the floor without touching the guide rails 11 or 12.

[0079] The guide webs 11 and 12 show a preferred embodiment. The first guide web 11 is connected to the second guide web 12 via a guide web base 50.

[0080] The guide bar base 50 of the two guide bars 11, 12 is mounted directly on the front of the shaft door 22. In a more advantageous arrangement, the guide bar base 50 would be mounted on top of the shaft door 22, and only the guide bars 11 and 12 would protrude into the gap between the shaft door 22 and the car door 21.

[0081] The situation is similar with the bearing 51 of the contact body 13. The bearing 51 of the contact body 13 is mounted directly on the front of the car door 21. In a more advantageous arrangement, the bearing 51 would be mounted on top of the car door 21, and only the contact body 13 would protrude into the gap between the shaft door 22 and the car door 21.

[0082] Fig. 4 and Fig. 5 show in detail how the contact body 13 and the guide bars 11 and 12 interact. Fig. 4 shows the situation with the deactivated door coupling. This allows the elevator to move without the contact body 13 on the car door touching the guide bars 11 and 12 on the shaft door. Fig. 5 shows the situation with the activated door coupling, in which the shaft door and the car door are coupled.

[0083] The contact body has a length dimension L along a length direction and a width dimension B along a width direction.

[0084] The guide webs 11 and 12 are arranged parallel to each other at a guide web distance D.

[0085] The lever 18 and the contact body 13 are connected to each other at the lower end of the lever 18. The bearing 51 of the contact body 13 is located in the center of the contact body 13. The bearing 51 is designed in the form of an elastomer torsion spring such that the situation shown in Fig. 4 corresponds to an unstressed position of the elastomer torsion spring. The lead angle α spans between the vertical axis and the lever 18. The upper end of the lever 18 is attached to a connector 15. The connector 15 transmits the movement of the drive means 14 to the lever 18. Preferably, it also holds the two ends of the drive means, often in the form of a traction cable or toothed belt, together.

[0086] To activate the door clutch, the drive element 14 is displaced to the left by the door drive. When the door clutch is activated, the contact body contacts the guide bars 11 and 12 with two contact points 16. A first contact point 16 contacts the first guide bar 11, and a second contact point contacts the second guide bar 12. The contact body 13 is now rotated by a coupling angle ß. The coupling angle ß is preferably equal to the lead angle α. Thus, the lever in Fig. 5 is vertically aligned.

[0087] Once the door clutch is activated, the car door lock 31 and the shaft door lock 41 can be unlocked. To open the car door 21 and the shaft door 22 together, against the force of the door closing device on the shaft door 22, the drive means 14 is moved further to the left. This increases the force at the contact point 16 between the contact body 13 and the first guide bar 11, and the car door 21 and the shaft door 22 open together.

[0088] The closing of the car door 21 and the shaft door 22 occurs in the reverse order. It is advantageous to select the movement path of the propellant 14 so that the propellant stops briefly at the position shown in Fig. 5. This also stops the car door 21 and the shaft door 22 in the position where they can be locked. This ensures a quiet closing process.

[0089] Fig. 6 shows a side view of the elevator 100. The car 7 has a car door 21, which is opposite a shaft door 22. A control device 6 receives signals from a position measuring device 60, which determines the position along a positioning belt 61 arranged in the shaft. The control device 6 controls the door drive 4 and the car door lock and the shaft door lock. The signal to the shaft door lock can be transmitted to the shaft door via another control device in the machine room, or, for example, directly to the shaft door via radio. The control unit 6, which is preferably arranged on the car, can, for example, also forward the signals from the position measuring device 60 to a main control unit, for example in a machine room, or receive and execute commands for opening or closing the door from the main control device.

[0090] Finally, it should be noted that terms such as "having," "comprising," etc., do not exclude other elements or steps, and terms such as "a" or "an" do not exclude a plurality. Furthermore, it should be noted that features or steps described with reference to one of the above embodiments may also be used in combination with other features or steps of other embodiments described above. Reference signs in the claims are not to be considered as limitations.

Claims

Patent claims 1. A door system (1) for an elevator (100), wherein the door system (1) comprises at least one shaft door (22), one car door (21), a car door drive (4), and a door coupling for coupling the car door (21) to the shaft door (22), and the car door and the shaft door are movable between an open position and a closed position, wherein the car door (21) has an electrically activatable car door lock (31) by which the car door (21) can be locked and unlocked in the closed position, the shaft door (22) has a separate electrically activatable shaft door lock (41) by which the shaft door (22) can be locked and unlocked in the closed position, the car door drive (4) comprises a motor and a drive means (14), and the car door (21) is movable by means of the drive means (14) is displaceable from the closed position to an open position and back, the door coupling has a first part,which is arranged on the car door (21) and has a second part which is arranged on the shaft door (22), the second part of the door coupling has at least one vertically oriented first guide web (11) projecting from the shaft door (22) and a vertically oriented second guide web (12) projecting from the shaft door (22), and the first and second guide webs (11, 12) are arranged at a guide web distance from one another, the first part of the door coupling on the car door (21) has a contact body (13), wherein the contact body (13) has a length dimension (L) along a length direction which is greater than the guide web distance (D), and the contact body (13) has a width dimension (B) along a width direction,which is smaller than the guide web distance (D), wherein the contact body (13) is arranged between the first guide web (11) and the second guide web (12) rotatably on the car door (21), characterized in that a lever (18) is connected to the drive means (14) and the lever (18) is connected in a rotationally fixed manner to the contact body (13), so that the contact body (13) by means of a movement of the drive means (14) from a decoupled position, in which the contact body due to the width dimensions, sung is arranged with play between the first and the second guide web, can be rotated into a coupling position in which the contact body touches the first and the second guide web.

2. Door system (1) according to claim 1, characterized in that the car door (21) has at least a first car door leaf (21a), and the shaft door (22) has at least a first shaft door leaf (22a).

3. Door system (1) according to claim 1 or 2, characterized in that the contact body (13), the first guide web (11) and the second guide web (12) are arranged above the car door (21) and / or above the shaft door (22).

4. Door system (1) according to one of the preceding claims, characterized in that the door system (1) has a prestressing device which applies a prestressing force to the contact body (13) in the direction of the decoupled orientation.

5. Door system (1) according to claim 4, characterized in that the pretensioning device is designed as an elastomer torsion spring.

6. Door system (1) according to one of the preceding claims, characterized in that the first guide web (11) and the second guide web (12) have a common guide web base (50).

7. Door system (1) according to one of the preceding claims, characterized in that the drive means (14) is designed as a drive means (14) rotating around a first roller (5) and a second roller (5), and preferably the first roller is driven by the door drive.

8. Door system (1) according to claim 7, characterized in that a connector (15) connects the lever (18) to the drive means (14), and that the connector (15) connects a first end of the drive means (14) to a second end of the drive means (14) connects.

9. Door system (1) according to one of the preceding claims, characterized in that the door system (1) has a door closing device on the shaft door (22), wherein the force of the door closing device is greater than the tensile force which the pull cable exerts on the lever (18) in order to move the contact body (13) into the coupling position.

10. Door system (1) according to one of the preceding claims 2 to 9, characterized in that the car door (21) has a second car door leaf (21b), and the shaft door (22) has a second shaft door leaf (22b), wherein a first door coupling couples the first car door leaf (21a) to the first shaft door leaf (22a), and in particular a second door coupling couples the second car door leaf (21b) to the second shaft door leaf (22b).

11. Elevator (100) comprising a door system (1) according to one of the preceding claims, characterized in that the elevator (100) comprises a position measuring device (60), a car (7) and a control device (6), wherein the position measuring device (60) detects a position of the car, the control device (6) evaluates the position and controls the opening and closing of the door system (1).

12. A method for operating an elevator (100) according to claim 11, comprising the steps Coupling the car door (21) to the shaft door (22) by the car door drive (4) displacing the drive means (14) a first distance in the direction of opening and thereby rotating the contact body (13) until the door coupling is coupled. Unlocking the car door (21) and the shaft door (22a) via an electrical signal to the car door lock (31) and the shaft door lock (41). Opening the shaft door (22) by the car door drive (4) moving the drive means (14) a second distance in the direction of opening and thereby shaft door (22).

13. The method according to claim 12, further comprising the step: after coupling and before unlocking, the door drive (4) is reset to relieve the locking mechanism.

14. The method according to claim 12 or 13 further comprising the step. Closing the car door (21) and the shaft door (22).

15. The method according to claims 12 to 14, further comprising the step. - closing the car door (21) by the car door drive (4) moving the drive means (14) a third distance in the direction of closing until the first car door (21) is closed, - locking the car door (21) and the shaft door (22) and - uncoupling the door coupling by the car door drive (4) moving the drive means (14) a fourth distance in the direction of closing.

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