Elevator car for an elevator system with openable ceiling

Abstract

The following descriptions relate to a car (3) having an interior with a ceiling (10), wherein the ceiling (10) has an opening (12) and a first cover (13.1) for selectively opening or closing the opening (12) and a closure (14) for holding the first cover (13.1) against at least one fixed or fixable first counter element, wherein the closure (14) has: a rotatable latch (14.1) arranged on the first cover (13.1); a bolt receptacle (14.2) arranged on the first counter element with a first projection (17.1) for engaging the bolt (14.1), wherein the bolt (14.1) is subjected to force to a rotational position overlapping with the first projection (17.1) and a tool engagement (16) facing the interior for rotating the bolt (14.1) against the force, wherein the bolt receptacle (14.2) has an adjustment contour (19) such that the bolt (14.1) is rotated out of the overlap by pressure against the underside of the bolt receptacle (14.2) using the adjustment contour (19).

Description

Technical field

[0001] The following descriptions relate to a car for an elevator system, comprising an interior space with a ceiling that limits the interior space in an upper direction, wherein the ceiling has an opening and at least one openable first cover for selectively opening or closing the opening and a closure for holding the first cover against at least one fixed or definable first counter element of the car when the opening is closed.

[0002] Furthermore, the following statements concern an elevator system comprising at least one elevator shaft with multiple landing positions and at least one such elevator car. Technical background

[0003] Elevator systems for transporting people and / or goods are an integral part of modern residential and commercial buildings. A typical elevator system comprises one or more elevator shafts, in each of which one or more cars are moved between landing positions by means of drives such as suspension drives or linear drives.

[0004] In such elevator systems, it is known to provide an opening in the ceiling of an elevator car that can be covered by at least one cover, which serves, for example, for the maintenance of the elevator system and / or the evacuation of persons from the elevator car in an emergency situation.

[0005] In particular, elevator systems with load-bearing drives are known to be designed without the otherwise usual machine room located above the elevator shaft. For these systems, the drive mechanisms for the elevator cars are arranged in the top of the elevator shaft.

[0006] It is known to carry out the maintenance of such a drive device from a maintenance platform inside the interior, wherein the maintenance platform is stored in the area of ​​the opening in the ceiling and is unfolded or extended from there when or after the cover is opened in order to set it up inside the interior. Such a lift system is known, for example, from EP 3 530 603 A1.

[0007] A disadvantage of the aforementioned elevator systems is that opening and closing the first cover(s) is usually quite complex. Furthermore, with previously known locking mechanisms, a secure closure is often not achieved.

[0008] From EP 2 123 586 A1, a car with an inner and an outer ceiling panel is known, wherein a rescue hatch is arranged in the outer ceiling panel and an inspection hatch opposite the rescue hatch is arranged in the inner ceiling panel. A cover for opening and closing the rescue hatch is arranged on the outer ceiling panel, and a cover for opening and closing the inspection hatch is arranged on the inner ceiling panel. The inner cover has a rotatable angle which, in one position, secures the inner cover to the inner ceiling panel and, in another position, releases the inner cover. Description - Technical solution

[0009] Based on this situation, the task at hand is to enable the simple and safe opening and closing of the cover(s) of a car as described above.

[0010] The present problem is solved by the features of the independent claims. Advantageous embodiments are specified in the dependent claims, the description, and the drawings. Where technically feasible, the teachings of the dependent claims can be combined arbitrarily with those of the main and dependent claims.

[0011] In particular, the problem is solved by a car for an elevator system, comprising an interior with a ceiling bounding the interior in an upper direction, wherein the ceiling has an opening and at least one openable first cover for selectively opening or closing the opening, and a closure for holding the first cover against at least one fixed or definable first counter element of the car when the opening is closed, wherein the closure comprises: a rotatable bolt arranged on the first cover, a bolt receptacle arranged on the first counter element with at least one first projection for engaging the bolt when the first cover is closed,wherein the bolt is subjected to force in a rotational position overlapping with the first projection and has an interior-facing tool engagement for rotating the bolt against the force out of the overlap with the first projection, wherein the bolt receptacle has an adjustment contour on an underside such that the bolt is rotated out of the overlap with the first projection by means of the adjustment contour by pressure against the underside of the bolt receptacle and can pass the first projection.

[0012] The following sections explain advantageous aspects and subsequently describe preferred modified embodiments. Explanations, particularly regarding advantages and definitions of features, are essentially descriptive and preferred, but not limiting, examples. If an explanation is limiting, this will be explicitly stated.

[0013] Where ordinal numbers, for example "first," "second," etc., are used, for instance to designate a component, an element, a process step, or a process action, these ordinal numbers are solely for differentiation in the designation and do not indicate any dependencies or sequences. This means, in particular, that a device does not need to have a "first component" to have a "second component." A device can also have a "first component" and a "third component" without necessarily having a "second component." Multiple units of the same ordinal number can also be used, for example, multiple "first components."

[0014] According to the present understanding, an elevator system is designed, for example, with at least one, in particular vertical, elevator shaft and at least one car that travels within the elevator shaft. However, it can also have several parallel elevator shafts and one or more cars per elevator shaft. A car is, for example, held and driven by means of a suspension element, wherein a drive device transmits a drive torque to the suspension element via a drive shaft. The suspension element is preferably connected to a counterweight associated with the car. The drive device is, in particular, arranged in an upper section of the elevator shaft, the so-called shaft head. A suspension element is, in particular, designed as a rope, belt, strap, chain, or the like and carries tensile loads in the direction of its longitudinal extension. Alternatively, a car is held and driven by means of a linear drive.

[0015] An elevator shaft is a continuous shaft that extends over several floors and / or along several areas of a building and has a cross-section designed for the passage of the elevator car. An elevator shaft can extend vertically and / or horizontally.

[0016] An elevator car is designed, in particular, as a cabin with four side walls, a floor, and a ceiling enclosing the interior, wherein at least one side wall is designed as an elevator car door or has an elevator car door. The interior is intended, in particular, for accommodating persons and / or transported goods during the elevator car's travel along the elevator shaft. In particular, the ceiling also forms the roof of the elevator car. Alternatively, the ceiling is designed as a suspended ceiling, with the roof formed above the ceiling, creating a space between the roof and the suspended ceiling, for example, for storing a maintenance platform and / or a ladder. In this case, the roof is preferably itself designed to be openable, for example, by means of a hatch.

[0017] Insofar as the present disclosure refers to spatial directions, in particular to an upper direction, a lower direction, or a vertical direction, these directions are defined, according to common understanding, by gravity. An upper direction thus points opposite to the direction of gravity, i.e., the lower direction.

[0018] According to the present understanding, a cover is a flat element that, in a closed position, covers and seals the opening in the ceiling. In an open position, the cover exposes the opening. For this purpose, the cover is, for example, completely removed. Preferably, however, the cover is designed as a flap and can be pivoted between the open and closed positions about a pivot axis, in particular defined by one or more hinges. When pivoting from the closed position to the open position, the flap then passes through a section of the interior.

[0019] A fastener serves to releasably secure the first cover to the first counter element. The first counter element is, in particular, a frame of the opening, with the fastener located on the frame and thus in the edge region of the first cover. The first counter element can also be a second cover, which is itself held to the frame, with the fastener on the second cover located in the edge region of the first cover. The fastener ensures that the cover is held to the first counter element in such a way that it does not detach itself and open due to gravity, and the fastener is manipulable in such a way that the cover is released for opening.

[0020] A fixed counter-element of the elevator car, as understood here, is in particular a structural frame, a structural strut, a cantilever arm, or the like, and especially forms part of the supporting structure of the elevator car. Insofar as a counter-element can be fixed to another fixed counter-element, it transmits forces to the fixed counter-element, at least for as long as the connection exists. The counter-elements ensure in any case that the cover is held over the closure on a fixed part of the elevator car.

[0021] A bolt can be formed as a rigid component of any shape, conforming to the kinematic relationships between the parts of the closure described herein. The bolt allows the first projection to engage beneath it. As the first projection engages beneath the bolt, the bolt rests upon it and prevents downward movement of the cover. If an overlap exists, it relates specifically to the relevant vertical direction. Two overlapping components cannot pass each other in the vertical direction as long as the overlap exists. The bolt receptacle is therefore preferably arranged off-center to the bolt's axis of rotation, so that a rotation results in an adjustment of the bolt relative to the bolt receptacle perpendicular to the vertical direction.

[0022] A tool attack is preferably designed such that only a tool corresponding to the tool attack can apply sufficient torque to rotate the bolt at the tool attack.

[0023] An adjustment contour is designed in particular as an adjustment curve or adjustment ramp, so that when pressure is applied to the underside of the adjustment curve or adjustment ramp, i.e., when the bolt moves upwards towards the bolt receptacle, it slides up the cam and is thereby pushed out laterally, i.e. horizontally, from the overlap with the bolt receptacle.

[0024] A force is applied continuously and is caused, for example, by a spring element. A force also includes a moment applied to the bolt, resulting in a force towards the rotational position at the intersection with the first projection.

[0025] The foregoing disclosure relating to the elevator car now includes the teaching that the bolt is rotatably mounted on the cover, whereby it is subjected to force towards the bolt receptacle and can be rotated away from the bolt receptacle by means of a tool against this force. Thus, the bolt is securely held against the bolt receptacle by the force when the first cover is closed, with the lower grip via the first projection reliably preventing the first cover from being opened. Furthermore, the adjustment contour ensures that when closing the first cover, only the first cover, and therefore the bolt attached to it, needs to be pressed against the first counter-element. The adjustment contour causes the bolt to rotate out of the intersection with the first projection against the force, without the need for a tool at the tool engagement point.Opening and closing the closure is therefore made particularly easy.

[0026] Alternatively or additionally, the first cover can be designed as a hinged flap. With such a flap, the closure is preferably located on the side of the first cover opposite the hinged support, which is formed in particular by a hinge. In the closed position, the first cover is then securely held against the ceiling on at least two sides and is also connected to the ceiling in the open position.

[0027] Alternatively or additionally, the car may be provided with a stop on the first cover for engaging the bolt in a rotational position overlapping the adjustment contour. In an open state of the first cover, the bolt is positioned by the stop in such a way that, when the bolt is pressed against the bolt receptacle, it engages the adjustment contour, thus enabling easy closing of the first cover without any further requirements or preparations. Furthermore, the stop serves to relieve stress on a component that exerts or transmits the force.

[0028] Alternatively or additionally, the bolt may be provided with a first recess, wherein the bolt receptacle further comprises a second projection for engaging the first recess when the first cover is closed, and wherein the second projection lies within the projection of the first projection. The second projection then engages the bolt at the first recess in addition to the engagement of the bolt by the first projection, thus achieving a particularly secure hold of the bolt in the engagement of the projections. In particular, the engagement of the second projection in the first recess allows the bolt to be held against the bolt receptacle in at least one further spatial direction compared to the support provided by the first projection. This prevents, for example, the projections from slipping out of the engagement under the bolt if the first cover is deformed, especially if forcibly bent.Insofar as the second projection lies within the projection of the first projection, the bar can pass the second projection the moment it is rotated out of the overlap with the first projection and can pass the first projection.

[0029] Alternatively or additionally, the first projection can be provided with an end hook for engaging behind the bolt. This further prevents the first projection from slipping out of the underhand grip on the bolt and consequently causing the first cover to open unintentionally. In particular, it prevents unintentional slippage due to vibrations of the elevator car during operation.

[0030] Alternatively or additionally, the bolt can be designed with a U-shaped cross-section. The engagement by the first projection or the engagement by the second projection is then formed, in particular, on an outer leg of the U-shape extending in the vertical direction, which, due to its vertical extension, exhibits sufficient stability against unintentional deformation. In contrast, the rotatable bearing of the bolt preferably engages the middle leg of the U-shape. Particularly preferably, the bolt is designed for positioning the bolt receptacle on either side relative to the bolt by forming vertical legs on both sides and can thus be used as a single component in various installation situations. Accordingly, a first recess is preferably arranged on both vertical legs. Similarly, the bolt receptacle can have a first projection or projection on each side.have a second projection to allow them to be used as a single part in different installation situations.

[0031] Alternatively or additionally, the first cover may be provided with a protective shield surrounding the bolt to prevent manual access to the bolt area. In particular, such a shield is arranged between the bolt and an adjacent edge of the first cover. This prevents a person's hand or finger from getting caught between the bolt and other parts of the closure, especially between the bolt and the stop, after the closure has been opened and the bolt has been rotated against the applied force, when the bolt is reset by the applied force. The risk of such an encounter is particularly high immediately after opening if the closure is located at an edge of the first cover and the edge is gripped to handle the first cover.

[0032] Alternatively or additionally, the protective cover can be provided with a second recess for the bolt to engage when it is rotated. For particularly good protection, the protective cover can then be positioned directly against the bolt, with the second recess allowing the necessary pivoting range for rotating the bolt.

[0033] Alternatively or additionally, the tool access point can be designed for use with a triangular key. Such a triangular key is also used in other maintenance-related areas of elevator systems, for example, for manually opening landing doors, and is therefore usually carried by maintenance personnel. Furthermore, it can be assumed that a passenger in the elevator system does not usually carry a triangular key, so that unauthorized opening of the first cover is sufficiently prevented.

[0034] Alternatively or additionally, the first counter element can be formed by a second cover, wherein the second cover can be selectively opened or closed by attaching it to a fixed second counter element of the car. Two covers can cover a relatively large opening overall, with each cover being significantly smaller than the opening for ease of handling. In particular, the second counter element is formed by the frame of the opening as a structural element of the car.

[0035] Alternatively or additionally, the second cover can be designed as a pivotally suspended flap. In such a flap, the latch receptacle is preferably located on the side of the second cover opposite the pivoting suspension, which is formed in particular by a hinge.

[0036] Alternatively or additionally, the second counter element may have third recesses, with the second cover having laterally arranged locking bolts for engaging these third recesses. The second cover can then be opened by means of these locking bolts, preferably by exposing an actuating mechanism or mechanisms for the locking bolts when the first cover is open. In the closed position, the second cover is securely held against the ceiling by the pivotable suspension and the third recesses, and in the open position, it is connected to the ceiling.

[0037] Alternatively or additionally, a maintenance platform may be provided in the area of ​​the opening, particularly at the first and / or second cover, specifically for setting up the maintenance platform within the interior. A maintenance platform is designed as a flat element and, when assembled, possesses sufficient rigidity to allow access by a person without significant deformation. Specifically, the maintenance platform, or a corresponding maintenance platform element, is mounted on the car's structural frame and can be assembled from its storage position in the area of ​​the opening by sliding and pivoting elements associated with the maintenance platform.Such a maintenance platform, stored in the area of ​​the opening, can be positioned relatively low in the interior. This allows the overlying part of the elevator car to provide a sufficiently high fall protection barrier for a person standing on the platform. Storing the maintenance platform in the area of ​​the opening saves space and keeps it out of sight during normal elevator operation.

[0038] The task is further solved by an elevator system comprising at least one elevator shaft with multiple landing positions and at least one elevator car as described above. The elevator system achieves the advantages described above with regard to the elevator car in a corresponding manner. In particular, the elevator system enables the simple and safe opening and closing of cover elements in the area of ​​the elevator car's ceiling.

[0039] Alternatively or additionally, a drive unit for propelling the elevator car can be arranged in the head of the elevator shaft. If the elevator car is then equipped with a maintenance platform that can be installed inside, the cover(s) must always be opened when maintenance is performed on the drive unit. The aforementioned advantages are thus particularly pronounced given the relatively frequent opening and subsequent closing. Brief description of the drawings

[0040] A preferred technical solution is explained in more detail below with reference to the accompanying drawings and preferred embodiments. The term "figure" is abbreviated as "Fig." in the drawings.

[0041] The drawings show Fig. 1 a schematic side view of an elevator system in one embodiment; Fig. 2 a perspective view of the ceiling of an elevator car for an elevator system according to Fig. 1 in one embodiment; Fig. 3a a detailed view of a closure in one embodiment, for example for a cover on a ceiling according to Fig. 2 in a first position; Fig. 3 leg detail view of the closure according to Fig. 3a in a second position; Fig. 3 shows a detailed view of the closure according to Fig. 3a and Fig. 3b in a third position; Fig. 4 a detailed view of a tool attack of a breech according to the Figures 3a to 3c Fig. 5 shows a detailed view of a closure in a further embodiment, for example for a cover on a ceiling according to Fig. 2 ; Fig. 6a a perspective view of parts of a closure in a further embodiment, for example for a cover on a ceiling according to Fig. 2in a first position; Fig. 6 leg perspective view of the closure according to Fig. 6a in a second position; Fig. 7 a detailed view of a ceiling of a car for an elevator system according to Fig. 1 in a further embodiment; Fig. 8 a detailed view of a closure in one embodiment, for example for a cover on a ceiling according to Fig. 7 ; and Fig. 9 a detailed view of parts of a closure in a further embodiment, for example for a cover on a ceiling according to Fig. 7 . Detailed description of the drawings

[0042] The described embodiments are merely examples that can be modified and / or supplemented in various ways within the scope of the claims. Each feature described for a particular embodiment can be used independently or in combination with other features in any other embodiment. Each feature described for an embodiment of a particular claim category can also be used accordingly in an embodiment of a different claim category.

[0043] Figure 1Figure 1 shows an elevator system 1 with an elevator shaft 2, wherein a car 3 is arranged to move vertically in the elevator shaft 2 between landing positions (not shown in detail). The car 3 is suspended from a suspension element 4, which is guided over several deflection pulleys 5 and a drive device 6 with a drive shaft 6.1 located in a shaft head 2.1. The suspension element 4 is also connected to a counterweight 7. Furthermore, the elevator system 1 includes a control unit 8 (shown schematically) by means of which the operation of the elevator system 1 is controlled.

[0044] Figure 2Figure 1 shows a ceiling 10 of a car 3 of an elevator system 1. The ceiling 10 has a structural frame 11, which is connected to other structural parts of the car 3 (not shown) and is therefore fixed to the car 3. The structural frame 11 surrounds an opening 12 in the ceiling 10, which can be selectively closed or opened by a first cover 13.1 designed as a flap. The first cover 13.1 is in Figure 2 slightly opened, i.e., folded away in a downward direction U from the opening 12. A closure 14 is also arranged on the first cover 13.1 and the structural frame 11, which is located in the Figures 3a to 3c is shown in detail.

[0045] The Figures 3a to 3c show the shutter 14 in several positions, whereby the one by means of the Figures 3a to 3cThe depicted sequence of positions corresponds to a closing process of the first cover 13.1. A bolt 14.1 of the closure 14 is arranged on the upper side of the first cover 13.1, wherein the bolt 14.1 is U-shaped and rotatably attached at its middle leg to a Figure 4 The rotating piece 15, shown in more detail, is mounted on the first cover 13.1. The rotating piece 15 extends through the first cover 13.1 and forms a tool grip 16 on its side facing the interior of the car 3, here designed for a triangular wrench. The rotating piece 15 is further subjected to force in a manner not shown in detail towards the [unclear text] in the Figures 3a and 3c The position of the bolt 14.1 is shown, for example by a spring element inserted therein. A stop 14.3 of the lock 14 is also arranged on the first cover 13.1, which holds the bolt 14.1 in this position in any case, as shown in Figure 3a depicted.

[0046] The closure 14 further comprises a bolt receptacle 14.2, which is arranged on the structural frame 11 of the ceiling 10 opposite the bolt 14.1. The structural frame 11 here forms a first counter-element. The bolt receptacle 14.2 has a first projection 17.1, which secures the bolt 14.1 in the closed position of the closure 14 or the first cover 13.1, which is located in Figure 3c As shown, it overlaps. The first projection 17.1 and the barrier 14.1 overlap in the positions according to the Figures 3a and 3c , while the bar 14.1 can be rotated out of this overlap against the force applied. The bar 14.1 can then pass the first projection 17.1. Such a position is in Figure 3bThe bolt 14.1 is unscrewed from the overlap when the first cover 13.1 is opened by means of the rotating piece 15 with a tool engaging it. When closing, the bolt 14.1 is unscrewed by pressing it upwards in the direction O, whereby an adjusting contour 19 of the bolt receptacle 14.2 engages at the transition between the middle leg and the side leg of the bolt 14.1 and pushes the bolt 14.1 laterally out of the overlap. As soon as the bolt 14.1 has passed the first projection 17.1, it is reset by the applied force and is then located in the undercut of the first projection 17.1, so that the closure 14 is closed. The first projection 17.1 also has a chamfer 20 on its upper side, which is shown by way of example in Figure 3aThe first projection 17.1 of the bolt receptacle 14.2, which faces away from the bolt 14.1, can be identified. The bolt receptacle 14.2 is formed with first projections 17.1 on both sides in order to be usable as an identical part on different sides of a bolt 14.1. The chamfer 20 counteracts the unintentional slippage of the bolt 14.1 out of the underhand grip of the first projection 17.1, for example as a result of vibration.

[0047] Figure 5 shows another embodiment of the closure 14, which corresponds to the one described in the Figures 3a to 3c The closure 14 shown is essentially identical and is not described again with respect to its identical features. Here, the bolt 14.1 continues to have a first recess 21.1, while the bolt receptacle 14.2 has a second projection 17.2 for engaging in the first recess 21.1. The second projection 17.2 lies within the projection of the first projection 17.1, i.e., the bolt 14.1 can be engaged in its Figure 5 In the depicted position, rotated out of the overlap with the first projection 17.1, both the first projection 17.1 and the second projection 17.2 pass. In the closed position of the closure 14 or the first cover 13.1, the second projection 17.2 then engages in the first recess 21.1, thus providing additional security for the closure 14. In particular, this prevents the bolt 14.1 and the bolt recess 14.2 from sliding against each other in the longitudinal direction L of the bolt 14.1 and thus prevents the first projection 17.1 from disengaging from its undercut beneath the bolt 14.1.

[0048] The in Figure 5 The first projection shown still features an end hook 22 for engaging the bar 14.1 from behind, instead of the chamfer 20. The hook 22 secures the first projection 17.1 against slipping out of the underhand grip, for example, due to vibration.

[0049] The Figures 6a and 6b show a further embodiment of the closure 14, which corresponds to the one in Figure 5 The closure 14 shown is essentially identical and will not be described again with respect to its identical features. Here, the closure 14 further includes a protective cover 23 to prevent manual access to the area of ​​the bolt 14.1. The protective cover 23 is arranged between the bolt 14.1 and a leading edge 24 of the first cover 13.1 and has a second recess 21.2. This second recess 21.2 allows the protective cover 23 to be positioned particularly close to the bolt 14.1, with the pivoting travel required to rotate the bolt 14.1 being provided by the second recess 21.2. Figure 6b shows a corresponding immersion of the bar 14.1 into the second recess 21.2 when the bar 14.1 is rotated.

[0050] Figure 7Figure 1 shows a further embodiment of a ceiling 10 in a bottom view, wherein an opening 12 formed in the ceiling 10 can be covered or closed halfway by a first cover 13.1 and halfway by a second cover 13.2. A closure 14 is formed between the first cover 13.1 and the second cover 13.2, as shown in Figure 1. Figure 8This is illustrated in more detail below. The second cover 13.2 thus forms a first counter-element. While the bolt 14.1 is located on the first cover 13.1, the bolt receptacle 14.2 is located on the second cover 13.2. The second cover 13.2 can then be secured to the structural frame 11, so that the structural frame 11 forms a second counter-element. When the covers 13.1 and 13.2 are opened, the first cover 13.1 is opened first by unlocking the latch 14, and then the second cover 13.2 is opened by releasing the second cover 13.2 from the structural frame 11. The closing sequence of the covers 13.1 and 13.2 is accordingly reversed.

[0051] Figure 9Figure 1 shows an exemplary embodiment of the second cover 13.2, which has laterally arranged locking bolts 25.1, 25.2 that are designed to engage in third recesses (not shown) on the structural frame 11. The locking bolts 25.1, 25.2 can be unlocked by a cable 26. Alternatively, the locking bolts 25.1, 25.2 can be unlocked by a rotating element 27 extending through the second cover 13.2, as shown, for example, in Figure 1. Figure 8 The rotating piece 27 then has a tool attack facing the interior of the car 3, approximately corresponding to the rotating piece 15. Reference symbol list

[0052] 1 Elevator system 2 Elevator shaft 2.1 Shaft head of the elevator shaft 3 Car 4 Suspension element 5 Deflection pulleys 6 Drive unit 6.1 Drive shaft 7 Counterweight 8 Control unit 10 Car ceiling 11 Ceiling structural frame 12 Opening in the ceiling 13.1 First cover 13.2 Second cover 14 Lock 14.1 Lock bolt 14.2 Lock bolt receptacle 14.3 Lock stop 15 Rotating piece 16 Rotary piece tool engagement 17.1 First projection of the bolt receptacle 17.2 Second projection of the bolt receptacle 19 Adjustment contour of the bolt receptacle 20 Chamfer of the first projection 21.1 First recess of the bolt 21.2 Second recess of the protective cover 22 Hook of the first projection 23 Protective cover 24 Front edge of the first cover 25.1 First locking bolt 25.2 Second locking bolt 26 Locking bolt cable 27 Locking bolt pivot L Longitudinal direction of the bolt Upper direction Lower direction V Vertical direction

Claims

1. Carriage (3) for an elevator system (1), comprising an interior space with a ceiling (10) bounding the interior space in an upper direction (O), wherein the ceiling (10) has an opening (12) and at least one openable first cover (13.1) for selectively opening or closing the opening (12); and a locking device (14) for holding the first cover (13.1) against at least one fixed or fixable first counter element of the car (3) when the opening (12) is closed; wherein the locking device (14) comprises: a rotatable bolt (14.1) arranged on the first cover (13.1); a bolt receptacle (14.2) arranged on the first counter element with at least one first projection (17.1) for engaging the bolt (14.1) when the first cover (13.1) is closed, wherein the bolt (14.1) is subjected to force to a rotational position overlapping with the first projection (17.1); and a tool engagement (16) facing the interior for rotating the bolt (14.1) against the force applied from the overlap with the first projection (17.1); wherein the bolt receptacle (14.2) has an adjustment contour (19) on an underside, such that the bolt (14.1) is rotated out of the overlap with the first projection (17.1) by means of the adjustment contour (19) by pressure against the underside of the bolt receptacle (14.2) and can pass the first projection (17.1).

2. Elevator car (3) according to claim 1, wherein the first cover (13.1) is designed as a pivotably suspended flap.

3. Elevator car (3) according to claim 1 or 2, comprising a stop (14.3) arranged on the first cover (13.1) for striking the latch (14.1) in a rotational position overlapping with the adjustment contour (19).

4. Elevator car (3) according to one of the preceding claims, wherein the latch (14.1) has a first recess (21.1), wherein the latch receptacle (14.2) further has a second projection (17.2) for engaging in the first recess (21.1) when the first cover (13.1) is closed, and wherein the second projection (17.2) lies within the projection of the first projection (17.1).

5. Elevator car (3) according to one of the preceding claims, wherein the first projection (17.1) has an end-side hook (22) for engaging behind the bolt (14.1).

6. Elevator car (3) according to one of the preceding claims, wherein the latch (14.1) has a U-shaped cross-section.

7. Elevator car (3) according to one of the preceding claims, wherein the first cover (13.1) further comprises a protective cover (23) surrounding the latch (14.1) to prevent manual intervention in the area of ​​the latch (14.1).

8. Elevator car (3) according to claim 7, wherein the protective cover (23) has a second recess (21.2) for the insertion of the bolt (14.1) into the second recess (21.2) when the bolt (14.1) is rotated.

9. Elevator car (3) according to one of the preceding claims, wherein the tool attack (16) is designed for attack by a triangular key.

10. Carriage (3) according to one of the preceding claims, wherein the first counter element is formed by a second cover (13.2) and wherein the second cover (13.2) can be fixed to a fixed second counter element of the carriage (3) for selectively opening or closing the opening (12).

11. Elevator car (3) according to claim 10, wherein the second cover (13.2) is designed as a pivotably suspended flap.

12. Elevator car (3) according to claim 11, wherein the second counter element has third recesses and wherein the second cover (13.2) has laterally arranged locking bolts (25.1, 25.2) for engaging in the third recesses.

13. Elevator car (3) according to one of the preceding claims, wherein a maintenance platform is mounted in the area of ​​the opening (12), in particular on the first cover (13.1) and / or the second cover (13.2), in particular for setting up the maintenance platform inside the interior.

14. Elevator system (1) comprising at least one elevator shaft (2) with multiple landing positions; and at least one elevator car (3) according to one of the preceding claims.

15. Elevator system (1) according to claim 14, wherein a drive device (6) for driving the car (3) is arranged in a shaft head (2.1) of the elevator shaft (2).

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