The present invention relates to an elevator installation with a multi-deck vehicle, which comprises at least two cars for transporting persons and/or goods and which is movable with the help of a drive and a support means along guide rails.
Such multi-deck vehicles of elevator installations conventionally include a common car frame, in which at least two cars are integrated and which is arranged to be movable or displaceable along guide rails in an elevator shaft. This common car frame is coupled by way of a support means with a drive and optionally also with a counterweight.
Multi-deck vehicles of that kind are known from, for example, the documents EP 1 342 690 A1, U.S. Pat. No. 6,786,305 B2, WO 98/09906 A1 and WO 2005/014460 A1. In the multi-deck vehicles disclosed in these documents in each instance different devices for changing a spacing between adjacent cars and/or adjusting a floor of a car are provided, so that these multi-deck vehicles can be used in elevator shafts with different floor spacings or in an elevator shaft with variable or imprecise floor spacings.
The invention has an object of providing an elevator installation of the kind stated in the introduction with an improved multi-deck vehicle which is simpler and more economic to produce and which offers an increased level of travel comfort.
The elevator installation comprises a multi-deck vehicle with at least two intercoupled cars for transporting persons and/or goods, wherein the multi-deck vehicle is movable with the help of a drive and a support means along guide rails. In that case guide elements are mounted at each of the cars of the multi-deck vehicle and guide the respectively associated car at the guide rails.
By contrast with conventional elevator installations with a multi-deck vehicle, in the multi-deck vehicle of the elevator installation according to the invention a common car frame is not provided, but the individual cars of the multi-deck vehicle are guided in each instance in their at least one guide plane directly at the guide rails of the elevator installation. The overall construction of such a multi-deck vehicle has a lower weight and can be produced more simply as well as installed more easily. Moreover, the multi-deck vehicle according to the invention has an improved vibration behavior, since by contrast with conventional elevator installations with a first movement system between cars and car frame and a second movement system between car frame and guide rails only a single movement system is present between the cars and the guide rails and a vibration coupling between the individual cars via the common car frame is eliminated. In addition, the large and heavy additional components, which are disadvantageous with respect to vibration behavior, of the common car frame are eliminated.
Advantageously, the at least two cars of the multi-deck vehicle are connected together by a coupling device which is constructed in such a manner that forces, which are directed by the coupling device exclusively substantially parallelly to the longitudinal axes of the guide rails, are transmissible between the cars. Such a coupling device serves the purpose of thus transmitting the supporting and drive forces from each of the cars of the multi-deck vehicle to the respectively adjacent car.
According to one of the forms of embodiment of the invention each of the cars comprises, in at least one guide plane lying at right angles to the longitudinal axes of the guide rails, guide elements which guide the car in said guide plane at the guide rails of the multi-deck vehicle.
By “guide plane” of a car there is to be understood in the present connection a plane which extends at right angles to the longitudinal axes of the guide rails and
in which a group of guide elements fixed to the car is arranged, which guide elements guide—at the guide rails of the multi-deck vehicle—the region of the car lying in this guide plane, or
in which an end region, which is not provided with guide rails, of a car is guided at an adjacent car.
Advantageously, each of the cars is guided in its at least one guide plane at the guide rails exclusively by the guide elements associated with this guide plane. The advantage resides particularly in the fact that a statically defined spacing of the car guidance is given for each car at any time. No undefined guidance states arise, such as is the case with multi-deck vehicles which have a rigid common guide frame guided in more than two guide planes.
Preferably at least one of the cars of the multi-deck vehicle is provided in at least two guide planes, which are spaced apart in the direction of movement of the multi-deck vehicle, with guide elements which guide the car at the guide rails in these guide planes independently of guide elements of further guide planes of the multi-deck vehicles. In the case of such a form of construction at least one of the cars is fully defined in static terms and guided at the guide rails independently of further cars of the multi-deck vehicle.
By the term “direction of movement of the multi-deck vehicle” there is to be understood in the present connection a direction of movement of the multi-deck vehicle in the direction of the longitudinal axis of the guide rails.
In an alternative embodiment at least one of the cars of the multi-deck vehicle is provided in at least two guide planes, which are spaced from one another in the direction of movement of the multi-deck vehicle, with guide rails which guide the car at the guide rails in these guide planes independently of guide elements of further guide planes of the multi-deck vehicle. At least one further one of the cars of the multi-deck vehicle is in that case guided in a first guide plane at an adjacent car of the multi-deck vehicle and is provided in a second guide plane, which is spaced from the first guide plane in the direction of movement of the multi-deck vehicle, with guide elements which guide the further car at the guide rails in its second guide plane independently of guide elements of further guide planes of the multi-deck vehicle. The advantage of such a form of embodiment resides in the fact that with regard to the further cars in each instance it is possible to dispense with a set of guide elements.
Advantageously, the coupling device comprises at least one joint by way of which it is pivotably connected with at least one of the cars of the multi-deck vehicle. With such a joint or such a pivotable connection it is achieved that the coupling device in the case of transmission of the supporting and driving forces from each one of the cars of the multi-deck vehicle to the adjacent car transmits only forces which are oriented substantially in the direction of movement of the multi-deck vehicle, i.e. in the direction of the longitudinal axis of the guide rails.
According to one of the forms of embodiment of the invention the coupling device is on a first side pivotably connected with one car and on a second side rigidly connected with the adjacent further car. It is thereby made possible to connect a guide plane of one car with the help of a coupling device with an adjacent car and thus to guide it.
Advantageously, the spacing between two cars of the multi-deck vehicle in the direction of movement of the multi-deck vehicle is settable by means of a motor-operated and controllable adjusting device integrated in the coupling device.
Such an adjusting device makes possible automatic adaptation of the spacing between the floor levels of the cars of a multi-deck vehicle to different floor spacings of a building.
According to a further form of embodiment of the elevator installation according to the invention at least one of the cars of the multi-deck vehicle has a car floor adjustable at least in a sub-region in the direction of movement of the multi-deck vehicle, wherein an adjusting movement is carried out by a motor-operated and controllable adjusting device. With this form of embodiment as well the automatic setting of the spacing between the floor levels of the cars of a multi-deck vehicle to different floor spacings of a building is made possible.
Advantageously, at least one of the cars of the multi-deck vehicle comprises a safety frame which is associated only with this car and in which a car body is mounted, wherein the guide elements associated with this car are fixed to this car frame. The installation of a car in a separate safety frame enables use of non-self-supporting car bodies with correspondingly lower inherent stability and reduced weight.
According to an alternative form of embodiment at least one of the cars of the multi-deck vehicle is constructed as a self-supporting construction, wherein the guide elements associated with this car are fastened to the self-supporting construction. With the use of self-supporting cars a simplification of the car construction as well as a reduction in the cross-section, which is demanded by the cars, of the elevator shaft result.
According to a further aspect of the invention at least one of the cars of the multi-deck vehicle is provided with at least one safety brake device.
Preferably, each of the cars of the multi-deck vehicle is provided with at least one safety brake device. In this case, the individual safety brake devices can be of simpler construction, since reduced demands are imposed thereon, because the safety function is distributed to several safety brake devices.
Advantageously, the at least one support means is so arranged that it directly supports and drives an uppermost or a lowermost car of the multi-deck vehicle, wherein the at least one further car of the multi-deck vehicle is coupled by means of the coupling device to the car supported by the support means.
The above as well as further features and advantages of the invention are more readily understandable from the following description of preferred, non-restrictive exemplifying embodiments with reference to the accompanying drawings, in which:
An elevator installation according to the present invention can be constructed as an elevator for persons or the transport of persons and optionally also goods or as a goods elevator exclusively for the transport of goods. Moreover, the elevator installation according to the invention is usable in various objects such as above-ground and/or below-ground buildings, in mines or in land or water vehicles.
The elevator installation shown in
The cars 12, 14 of the multi-deck vehicle 10 according to
The multi-deck vehicle 10 is movable with the help of a support means 16 along its travel path defined by guide rails 20. The support means 16 co-operates with a drive 18 which supports and drives the support means and thus the multi-deck vehicle 10. A resiliently bendable, belt-like or cable-like support means is preferably used as the support means 16, wherein the invention is not to be restricted to a specific form of construction of the support means. In the case of the form of embodiment illustrated in
The drive 18 comprises a drive engine or several drive engines, which are optionally operable independently of one another and which drive the support means or the multi-deck vehicle 10 by way of a drive pulley or a drum. However, the present invention is not to be restricted to a specific form of construction of the drive 18.
The cars 12, 14 of the multi-deck vehicle illustrated in
The multi-deck vehicle 10 is preferably—but not necessarily—arranged in an elevator shaft with a wall surrounding the shaft at least in sections. In a particularly preferred form of embodiment the travel path of a counterweight is also disposed in the elevator shaft near the travel path of the multi-deck vehicle 10. In another form of embodiment the counterweight is accommodated in a separate elevator shaft. Belonging to the elevator shaft in general are also a shaft head in the upper end region and a shaft pit in the lower end region in order to provide possibly desired over-travel paths and protection spaces. Buffers for the multi-deck vehicle 10 or the counterweight can, for example, be arranged in the shaft pit.
Substantially rigid guide rails for the multi-deck vehicle 10 and optionally also guide rails for the counterweight are arranged at the side walls of the elevator shaft. The guide rails 20 have the task of precisely and exactly guiding the multi-deck vehicle 10 in the travel path allocated thereto. The cars 12, 14 of the multi-deck vehicle 10 are each equipped with guide elements 22 firmly fixed to the cars or the safety frames 12.1 thereof, by which they are guided in the elevator shaft at the guide rails 20. These guide elements can be present in the form of, for example, rolling guide shoes, sliding guide shoes, magnetic guide shoes, etc. Groups of such guide elements 22 are respectively arranged at the cars 12, 14 in common guide planes 12A, 12B, 14A, 14B, which extend at right angles to the longitudinal axes of the guide rails and which in the present exemplifying embodiment are horizontal. In each guide plane the cars 12, 14 are guided at the guide rails 20 exclusively by the guide elements 22 associated with this guide plane.
In the case of the form of embodiment shown in
In the exemplifying embodiment according to
According to a preferred form of embodiment of the invention the coupling device 24 is so conceived that it can effect a motor-operated, controllable adjustment of the spacing between the two adjacent cars 12, 14. In this manner the spacings between cars of the multi-deck vehicle 10 can be automatically adapted to varying floor spacings of the elevator shaft. Such a coupling device 24 can comprise an adjusting device, for example a linear setting drive, which is symbolically illustrated in
The cars 12, 14 of the multi-deck vehicle 10 are guided directly at the guide rails 20 of the elevator shaft without a common car frame being present. The cars 12, 14 therefore hardly have to be modified relative to conventional individual cars. A large component such as the common car frame usually present in conventional multi-deck vehicles is eliminated, which significantly simplifies transport of the multi-deck vehicle 10 as well as the mounting thereof in an elevator shaft.
By virtue of the direct coupling of the cars of the multi-deck vehicle 10 to the guide rails 20 of the elevator shaft the vibration behavior is in addition improved by comparison with conventional construction with a common car frame. This is due to the fact that in the case of the system according to the invention each car is separately guided at the guide rails and a larger and heavier common car frame with low intrinsic frequency is not present. In order to further reduce the vibrations occurring in this movement system the guide rails 20 are preferably mounted in the elevator shaft by sound-damping and vibration-damping fastening elements.
Moreover, at least one of the cars 12, 14 of the multi-deck vehicle 10 is equipped with at least one safety brake device 26. Preferably, all cars 12, 14 of the multi-deck vehicle 10 are equipped with such safety brake devices. Thus, either an increased safety in the case of a required activation of the safety brake devices can be achieved or the demands on individual safety brake devices can be reduced, because the safety function is distributed to a larger number of safety brake devices 26. In the latter case, the individual safety brake devices 26 can therefore be constructed to be simpler and more economic.
The safety brake devices 26 are respectively fixedly connected with a car 12, 14 or with the safety frame 12.1, 14.1 thereof. They usually comprise a safety housing with the safety elements, transmission elements and connecting elements for triggering of the safety brake device. The safety brake devices 26 are in general activated by a speed limiter when a predetermined trigger speed is exceeded by the multi-deck vehicle. However, the present invention is not to be restricted to a specific form of construction, number or arrangement of the safety brake devices 26 for the multi-deck vehicle 10.
A second exemplifying embodiment of the present invention is now explained in more detail with reference to
In the exemplifying embodiment shown in
The exemplifying embodiment according to
In a case of a multi-deck vehicle 10 in the form of embodiment according to
A multi-deck vehicle 10 according to the invention can also be constructed so that the lowermost car is guided in two guide planes and that all further cars have in the region of their car ceilings a respective guide plane with guide elements which co-operate with the guide shoes. In this case, all further cars are guided in their second guide plane, which lies in the region of the car floor, by means of a coupling device 24 at the car respectively lying thereunder.
The coupling device 24 is rigidly connected by one of the respectively coupled cars 12, 14, whilst its connection with the other car is executed as an articulated coupling. It is thereby ensured that the coupling device transmits forces only in the direction of the movement of the multi-deck vehicle 10 so that the guide elements of the respectively coupled cars do not influence one another.
By contrast to the cars, which are illustrated in
In the case of a multi-deck vehicle 10 in the form of embodiment according to
As an alternative to the afore-described adjusting device 24.3 forming part of the coupling device 24 the cars 12, 14 of the multi-deck vehicle 10 can, as shown in
The remaining features and modifications correspond with those of the above-explained first exemplifying embodiment according to
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.
Number | Date | Country | Kind |
---|---|---|---|
09153265.5 | Feb 2009 | EP | regional |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/EP2010/051932 | 2/16/2010 | WO | 00 | 11/7/2011 |