Elevator car having a movable car door

Abstract

An elevator system includes an elevator car with a car door arranged on the elevator car. The car door includes at least one door leaf movable in a translatory manner, a guide rail fastened to the elevator car, which guide rail forms a guide for the translatory movement of the door leaf, and a drive assembly for driving the door leaf. The drive assembly is movably mounted on the elevator car.

Claims

1. An elevator system including an elevator car and a car door arranged on the elevator car, the car door comprising: a translationally movable door leaf; a guide rail stationarily fixed to the elevator car in an alignment for guiding the translational movement of the door leaf; a drive arrangement driving the door leaf in the translational movement, wherein the drive arrangement is movably mounted on the elevator car; wherein the drive arrangement includes a pair of deflection elements and a circulating drive belt that is deflected by the deflection elements, wherein the drive belt is coupled to the door leaf to drive the door leaf in the translational movement, and wherein the deflection elements are spaced apart by a constant distance and are movably mounted on the elevator car; and a connecting element connecting the deflection elements and a deflection element guide for guiding the deflection elements during the translational movement.

2. The elevator system according to claim 1 wherein the drive arrangement is mounted on the elevator car for movement in parallel with the alignment of the guide rail.

3. The elevator system according to claim 2 wherein the drive arrangement is mounted on the elevator car for movement horizontally.

4. The elevator system according to claim 1 wherein the deflection elements are deflection rollers.

5. The elevator system according to claim 1 wherein the drive arrangement includes a door drive motor for driving the drive belt.

6. The elevator system according to claim 5 wherein the door drive motor is coaxial with respect to one of the deflection elements.

7. The elevator system according to claim 1 wherein the connecting element is movably mounted on the elevator car by springs or shock absorbers arranged to be mirror-symmetrical.

8. The elevator system according to claim 1 wherein the car door is a centrally opening car door having two of the door leaf and including a separate car door-shaft door coupling arranged on each of the door leaves.

9. The elevator system according to claim 1 wherein the car door includes a door header fixed to the elevator car, the guide rail being fixed to the door header, and wherein the drive arrangement is movably mounted on the door header.

10. The elevator system according to claim 9 wherein the drive arrangement is a belt drive arrangement.

11. An elevator system including an elevator car and a car door arranged on the elevator car, the car door comprising: a translationally movable door leaf; a guide rail fixed to the elevator car in an alignment for guiding the translational movement of the door leaf; a drive arrangement driving the door leaf in the translational movement, wherein the drive arrangement is movably mounted on the elevator car; wherein the drive arrangement includes a pair of deflection elements and a circulating drive belt that is deflected by the deflection elements, wherein the drive belt is coupled to the door leaf to drive the door leaf in the translational movement, and wherein the deflection elements are spaced apart by a constant distance and are movably mounted on the elevator car; and a connecting element connecting the deflection elements and a deflection element guide for guiding the deflection elements during the translational movement.

12. The elevator system according to claim 11 wherein the connecting element is movably mounted on the elevator car by springs or shock absorbers arranged to be mirror-symmetrical.

Description

DESCRIPTION OF THE DRAWINGS

(1) The invention is explained in greater detail in the following with reference to drawings, in which:

(2) FIG. 1 is a front view of an elevator car;

(3) FIG. 2 is a schematic view of a car door comprising a belt drive arrangement and coupling elements of a shaft door;

(4) coupling elements of a shaft door;

(5) FIG. 3 shows the arrangement according to FIG. 2, with the car door being arranged so as to not be aligned with respect to the shaft door;

(6) FIG. 4 is a schematic view of a car door comprising a belt drive arrangement that is mounted such that it can move horizontally according to a first embodiment and the coupling elements of a shaft door; and

(7) FIG. 5 shows the deflection elements of a belt drive arrangement, which elements are mounted such that they can move horizontally, according to a second embodiment.

DETAILED DESCRIPTION

(8) FIG. 1 shows a front view of an elevator car 2, which elevator car 2 is arranged in an elevator shaft 1 so as to be vertically movable. The elevator car 2 has a car front 3. A car door 4 is arranged on the car front 3. As shown in FIG. 1, the car door 4 can comprise a door header 42 arranged in the upper region of the car front 3, on which door header further elements of the car door 4 are arranged. As an alternative thereto or to the following description of FIG. 1, these elements can be arranged or mounted or fixed in the upper region of the car front 3 without the presence of a door header 42 of this kind.

(9) The car door 4 also comprises two door leaves 8, 8′, a guide rail 40, a car door sill 6 and a belt drive arrangement 12. The guide rail 40 is fixed to the door header 42 and is provided for guiding the at least one door leaf 8, 8′. The door leaves 8, 8′ can be guided by means of the car door sill 6 in the lower region of the car front 3. The door leaves 8, 8′ can be translationally moved along the car door sill 6 or the guide rail 40. Each one of the door leaves 8, 8′ is fixed to a door support 10, 10′ associated with the door leaf 8, 8′.

(10) The door support 10, 10′ comprises elements (not shown in FIG. 1) for guiding along the guide rail 40. These aforementioned elements are usually formed at least by guide rollers.

(11) A car door-shaft door coupling 20, 20′ is arranged on each of the door supports 10, 10′ shown in FIG. 1. It should be noted that, for car doors which are designed as telescopic doors, a car door-shaft door coupling 20, 20′ of this kind is only arranged on the guiding door leaf or on at least one of the guiding door leaves or the door support of said leaf/leaves.

(12) The belt drive arrangement 12 comprises a first deflection roller 14, a second deflection roller 16 and a drive belt 18, which drive belt 18 is guided around these deflection elements 14, 16. According to FIG. 1, the deflection elements 14, 16 are designed as deflection rollers. The belt drive arrangement 12 can comprise a door drive motor 15 which is coupled to one of the deflection elements 14, 16 in order to drive the door leaves 8, 8′. Moreover, the shaft of the door drive motor 15 can be arranged coaxially with respect to the axle of the one deflection element 14, 16 that is designed as a deflection roller.

(13) Alternatively, the door drive motor can be arranged on the car front without being part of the belt drive arrangement 12. Correspondingly, the driving force of the door drive motor can be transmitted to at least one of the deflection elements, for example, by means of a resilient circulating belt.

(14) In order to enter the elevator car 2 from a floor or to leave this elevator car 2, the elevator car 2 has be arranged vertically at the same height as the shaft door (not shown) that is associated with this floor. Correspondingly, the car door 4 and the shaft door can be coupled.

(15) FIGS. 2, 3 and 4 are schematic views of car doors comprising belt drive arrangements 12 and counter elements 22, 24, 22′, 24′ of shaft doors, with FIGS. 2 and 3 showing a car door and a shaft door arranged thereon in a state in which they are aligned with one another (FIG. 2) and in a state in which they are not aligned with one another (FIG. 3). The car door shown in FIG. 4 also comprises a movably mounted belt drive arrangement 12.

(16) The car doors comprise a first car door-shaft door coupling 20 on the left-hand side and a second car door-shaft door coupling 20′ on the right-hand side, which couplings are mounted on the corresponding door supports 10, 10′ of the car door. Each one of the car door-shaft door couplings 20, 20′ comprises a pair of drive runners 21, these drive runners 21 usually being aligned in parallel with the direction of travel of the elevator car and being provided for actuating the counter elements 22, 24, 22′, 24′ during coupling. The counter elements 22, 24, 22′, 24′ on the shaft door side usually comprise, relative to each car door-shaft door coupling 20, 20′, a stationary counter element 22, 22′ and an unlocking roller 24, 24′.

(17) Each one of the car door-shaft door couplings 20, 20′ is rigidly connected to the drive belt 18 of the belt drive arrangement 12 at a fastening point 30, 30′ that is associated with the car door-shaft door couplings 20, 20′.

(18) During travel of the elevator car, the drive runners 21 that belong to an individual car door-shaft door coupling 20, 20′ are folded, i.e. are spaced apart from one another at a comparatively small distance. In order to couple the car door and the shaft door, the two drive runners 21 of each car door-shaft door coupling 20, 20′ are spread apart from one another. These drive runners 21 are correspondingly at a large distance from one another when in the coupled state.

(19) FIG. 2 shows a car door 4 that is aligned with respect to the shaft door. This means that the car door center CDC is covered by the shaft door center LDC.

(20) FIG. 3 shows the arrangement shown in FIG. 2, the shaft door being arranged so as to not be aligned with respect to the car door 4. Correspondingly, the car door center CDC and the shaft door center LDC are not congruent. When the car door 4 begins to open, the drive runners 21 of the car door-shaft door couplings 20, 20′ are spread apart. When the car door-shaft door couplings 20, 20′ are spread apart, the shaft door leaf which is associated with the first unlocking roller 24′ is unlocked. Otherwise, the shaft door leaf which is associated with the first car door-shaft door coupling 20 is not unlocked or cannot be unlocked because none of the drive runners 21 of the first car door-shaft door coupling 20 actuates or contacts the unlocking roller 24 that is associated with the first car door-shaft door coupling 20.

(21) The belt drive arrangement 12 shown in FIG. 4 comprises movably mounted deflection rollers 14, 16. The movable mounting is achieved by pivot levers 17, 17′, a first end of these pivot levers 17, 17′ being fixed to the elevator car 4 or, when there is a door header present, to the door header. The mounting of the deflection rollers 14, 16 can in this case be designed such that the belt drive arrangement 12 can only be displaced horizontally. In order to be able to achieve a belt drive arrangement 12 that can be displaced substantially horizontally, the pivot levers 17, 17′ can be longitudinally adjustable, for example.

(22) The drive runners 21 that belong to the first and those that belong to the second car door-shaft door coupling 20, 20′ are shown in the partially spread apart state. This means that the coupling of the car door to the shaft door is not fully completed. When the drive runners 21 spread apart further, the movable mounting of the deflection rollers 14, 16 results in the drive runner 21 of the first car door-shaft door coupling 20, which runner contacts the stationary counter element 22, pressing against this stationary counter element 22. Due to the movable mounting of the belt drive arrangement 12 and the horizontally fixed connection of the first car door-shaft door coupling 20 to the drive belt 18, the belt drive arrangement 12 is displaced in accordance with the arrow B shown in FIG. 4. Correspondingly, the car door is aligned with respect to the shaft door, which is shown by means of arrows V that denote a displacement of the car door center CDC. This merely results in the unlocking roller 24 associated with the first car door-shaft door coupling 20 being actuated after the drive runners 21 have been spread apart further.

(23) FIG. 5 shows components of a belt drive arrangement 12. The belt drive arrangement 12 comprises a connecting element 19. The connecting element 19 causes the deflection rollers 14, 16 of the belt drive arrangement 12 to be constantly spaced apart despite the horizontal mobility of these deflection rollers 14, 16. The deflection elements 14, 16 are also guided along a deflection element guide 17″. The deflection element guide 17″ is fixed horizontally to the elevator car 2 or to the door header 42.

(24) The deflection rollers 14, 16 which are constantly spaced apart, or alternatively the connecting element 19, can be movably mounted on the elevator car 2 by means of two identical springs or shock absorbers 44 which are arranged so as to be mirror-symmetrical, for example. Once the car door-shaft door coupling 20 does not contact the counter elements, i.e. the car door is decoupled from the shaft door, the belt drive arrangement is thus arranged in a starting position.

(25) In accordance with the provisions of the patent statutes, the present invention has been described in what is considered to represent its preferred embodiment. However, it should be noted that the invention can be practiced otherwise than as specifically illustrated and described without departing from its spirit or scope.