EP2227429B1 - Elevator system having two elevator cars - Google Patents

Description

The invention relates to an elevator installation with two elevator cars which can be moved independently of one another along a common guide track.

In order to improve the transport capacity of an elevator installation with a small space requirement, two elevator cars are arranged in the same elevator shaft. The two elevator cars are independently movable along a common, usable by both guideway.

Such elevator systems with two or optionally more than two elevator cars in the same elevator shaft are provided above all for tall buildings. The merits of these two-cabin lifts are particularly effective when the individual elevator cars can circulate at a relatively high speed.

As in conventional elevator systems with only one elevator car, in such elevator systems with several elevator cabins tensioning devices are provided with sub-ropes when driving speeds are intended, which are above a certain speed limit, for example about about 2.5 m / s. The tensioning device for the sub-cables preferably has a blocking effect in order to prevent the counterweight from jumping when the car-trapping brakes are activated, for which purpose the counterweight is delayed by a reaction force introduced into the elevator shaft.

Because of the vertically aligned arrangement of two elevator cars, it is difficult to accommodate in the common elevator shaft drive elements, support and tension elements in the form of flexible flat belts and / or cables and roller assemblies for driving, guiding and deflecting the support and tension elements. As another flexible elements must also be arranged the sub-cables with the roles required for their deflection and guidance. Another requirement is to realize a suitable introduction of the forces on the elevator cars.

The WO 2006/065241 discloses such an elevator installation with two elevator cars, which can be moved independently of one another along a roadway which can be used by both elevator cars. Both elevator cars are suspended from their own carrying and traction means and have their own counterweights. The upper elevator car is centrally hung 1: 1, the lower elevator car is symmetrically suspended 1: 2 and has pulleys for guiding and steering the carrying and traction means. A satisfactory solution for attaching, diverting and guiding sub-cable assemblies is not described.

The object of the invention is therefore to propose a perfectly functioning, with all necessary safety to operate elevator system with several elevator cars.

The solution of this object is achieved according to the invention by the features of claim 1.

Preferred developments of the elevator installation according to the invention are defined by the dependent claims.

The new elevator installation thus has a first elevator cage and a second elevator cage, wherein the first elevator cage is always arranged below the second pull-out cage. The two elevator cars can be moved along a common roadway and can be driven essentially independently of each other. The first, lower elevator car has a support and traction means, on which it is suspended 1: 2, and which has two areas or ends, which are guided by means of a first deflection roller assembly. The deflection roller assembly comprises two deflection rollers, which are attached to the lower area of the first elevator car. In a preferred arrangement, the forces are introduced into the elevator car essentially symmetrically, preferably centrally symmetrically. The lower elevator car is coupled to a counterweight assigned to it. In addition, a sub-cable arrangement with a lower cable is provided, which is preferably attached at one end to the first elevator car, preferably at least approximately centrically and suspended 1: 1. The sub-cable is tensioned by means of a first sub-cable tensioning device. With its other end, the lower rope is attached to the first counterweight.

The second, upper elevator car also has a support and traction means on which it is preferably at least approximately centric 1: 1 suspended. It is coupled with a second counterweight assigned to it. Provided below is a sub-cable, which has two sub-cable ends, which are attached to the upper elevator car. The lower cable ends are preferably suspended at least approximately centrally symmetrically or diagonally 1: 2 by means of a first deflection roller for the first lower cable end and a second deflection roller for the second lower cable end. The lower cable is tensioned by means of a second lower cable tensioning device. The sub-cable ends are fixed by attaching the first sub-cable end to a first attachment point and the second sub-cable element to a second attachment point, wherein at least one of the Befestigungsstel len is located on a weighting body which is suspended from the sub-cable end connected thereto or which is arranged and, if necessary, elastically, fastened or held so that it can move vertically relative to the floor of the elevator shaft at least by a certain amount of play.

The pulleys for the two ends of the support and traction means of the lower elevator car on the one hand and the pulleys for the two lower cable ends of the upper elevator car on the other hand are preferably arranged at different horizontal distances and at least approximately point-symmetrical diagonal to each other.

Preference is given to sub-cable arrangements with tensioning devices for each elevator car. Here, the numerous flexible elements are preferably mounted so that there is always enough space between adjacent flexible elements to avoid mutual interference. In particular, a symmetrical and / or centric introduction of the forces of the carrying and traction means in the elevator cars are preferably also present, and also preferably the forces of the sub-cable arrangements are introduced symmetrically or centrically.

In a preferred embodiment, the new elevator installation is designed so that the lower cable tensioning device of the lower cable of the first elevator car is arranged below the support and traction means of the first elevator car. That the attachment point of the sub-cable to the first elevator car is below the support and traction means of the first elevator car, e.g. on a bracket which is attached to the first elevator car.

The lower cable tensioning device for the lower cable of the lower elevator car can have a roller arrangement which is fixed in place or with little play on a wall of the elevator shaft. Alternatively, this sub-rope tensioning device 7 1 Have deflection and weighting arrangement, which is suspended as a bottle on the lower cable.

The sub-cable arrangement of the upper elevator car may be designed so that the attachment points of the two sub-cable ends are stationary, and that the sub-rope tensioning device comprises a roller and weighting arrangement suspended on the sub-cable as a bottle.

Alternatively, the attachment point of one of the lower cable ends of the upper elevator car can be arranged on a weight body hanging freely in the elevator shaft, and the fastening point of the other lower cable end can then be fixed in place to a boundary of the elevator shaft, for example at the bottom of the elevator shaft.

In a particularly preferred development of the new elevator installation, it can be provided that at least the tensioning device of one of the lower cables of the first, lower elevator car or the second, upper elevator car comprises a braking and / or blocking device, preferably with a hydraulic cylinder and a pressure check valve, around the lower cable to brake or to hold stationary when one of the two elevator car approaches with a speed exceeding a predetermined maximum speed.

Fig. 1A

ein erstes Ausführungsbeispiel der erfindungsgemässen Aufzugsanlage, in vereinfachter, schematisierter Darstellung, von der Seite;

Fig. 1B

das in Fig. 1A dargestellte Ausführungsbeispiel der Erfindung, in einem gegenüber Fig. 1A vergrösserten Massstab, von oben;

Fig. 2A

ein zweites Ausführungsbeispiel der erfindungsgemässen Aufzugsanlage, in vereinfachter, gleicher Darstellung wie Fig. 1A;

Fig. 2B

das in Fig. 2A dargestellte Ausführungsbeispiel der Erfindung, in gleicher Darstellung wie Fig. 1B.

Fig. 3A

ein drittes Ausführungsbeispiel der erfindungsgemässen Aufzugsanlage, in vereinfachter, gleicher Darstellung wie Fig. 1A; und

Fig. 3B

das in Fig. 3A dargestellte Ausführungsbeispiel der Erfindung, in gleicher Darstellung wie Fig. 1B.

In the following, details and advantages of the invention with reference to an embodiment and with reference to the drawings will be described in detail. Show it:

Fig. 1A

a first embodiment of the elevator system according to the invention, in a simplified, schematic representation, from the side;

Fig. 1B

this in Fig. 1A illustrated embodiment of the invention, in a opposite Fig. 1A enlarged scale, from above;

Fig. 2A

A second embodiment of the elevator system according to the invention, in a simplified, same representation as Fig. 1A ;

Fig. 2B

this in Fig. 2A illustrated embodiment of the invention, in the same representation as Fig. 1B ,

Fig. 3A

a third embodiment of the elevator system according to the invention, in a simplified, same representation as Fig. 1A ; and

Fig. 3B

this in Fig. 3A illustrated embodiment of the invention, in the same representation as Fig. 1B ,

The same and similar, essentially the same design elements are in the Fig. 1A . 1B . 2A . 2 B and 3A . 3B provided with the same reference numerals. It should also be noted that designated as the ends of carrying and traction means and as Unterseilenden parts of flexible elements have no fixed dimensions but depending on the position of the elevator cars have different lengths.

Fig. 1A shows an elevator system 10 according to the invention. The elevator installation 10 comprises a first elevator car K1 arranged at the bottom and a second elevator car K2 arranged at the top. The two elevator cars K1 and K2 can be moved up and down independently of one another along a roadway that can be used by both elevator cars K1 and K2. The carriageway with lateral guides is located in an elevator shaft 12, which is bounded by four side walls 14.1, 14.2, 14.3, 14.4, a shaft pit or a floor 16 and a ceiling 18.

The first, lower elevator car K1 is suspended on or in a support and traction means 102 substantially point-symmetrically or with diagonally opposite force introduction areas and in the ratio 1: 2. The carrying and traction means 102 of the lower elevator car K1 comprises a first end 102.1 and a second end 102.2. The suspension of the first, lower elevator car K1 takes place on two opposite cabin sides, and seen from above, as in Fig. 1B shown at least approximately centrally symmetric. The first end 102. 1 of the carrying and pulling element 102 is connected via a first deflection roller 104. 1, which is at the bottom to the first Elevator car K1 is mounted, led to a fixed attachment point 103.1 on the ceiling 18 of the elevator shaft 12. The second end 102.2 of the support and traction element 102 is connected via a second pulley 104.2, which is also arranged at the bottom of the first elevator car K1, via a roller assembly 106 and a further above the first counterweight G1 roller assembly 108 to another stationary attachment point 103.2 the ceiling 18 of the elevator shaft 12 out.

The second, upper elevator car K2 is suspended centrally in a 1: 1 suspension on a second support and traction means 202. The support and traction means 202 is guided via roller arrangements 206 to an attachment point 203, which is arranged at the top of the second counterweight G2, and fastened there.

The first, lower elevator car K1 has a first cable tension compensation. This first cable tension compensation comprises a first lower cable 110. The lower cable 110 is attached at least approximately centrally to the floor of the first elevator car K1. The sub-cable 110 is tensioned via a lower cable tensioning device. This sub-cable tensioning device has a sub-cable roller arrangement 112 with two sub-cable rollers, via which the lower cable 110 is guided to an attachment point 113, which is arranged at the bottom on the first counterweight G1. The mentioned sub-rope rollers are preferably as a roller and weighting arrangement 122, which is suspended as a bottle on the lower cable 110 free.

In an optional embodiment, said sub-rope rollers are stationary, for example connected to a wall or floor of the elevator shaft 12. You can also, in a manner not shown, in particular in the vertical direction to be held by a low height or a slight clearance and possibly elastic, adjustable.

The second, upper elevator car K2 has a second cable tension compensation. The second cable tension compensation comprises a second lower cable 210 with two lower cable ends 210.1 and 210.2. The lower cable ends 210.1 and 210.2 are guided laterally, on opposite sides of the second elevator car K2 and at least approximately centrally symmetrical or diagonally on the second elevator car K2. At the second elevator car K2, a second deflecting roller arrangement is further attached below, with a deflection roller 204.1 for one lower cable end 210.1 and with a further deflecting roller 204.2 for the other lower cable end 210.2.

The one lower cable end 210.1 of the lower cable 210 of the second elevator car K2 is guided by the deflection roller 204.1 to an attachment point 213.1 on a weighting body 214, which is fastened to the lower cable end 210.1 in the elevator shaft 12. This weighting body 214 can be freely suspended or even at a small distance, in the manner of a game, height-adjustable at one of the boundaries of the elevator shaft 12, in particular at the bottom 16 and, if necessary, elastically attached.

The other sub-cable end 210.2 of the sub-cable arrangement of the second elevator car K2 is provided by the pulley 204.2, a sub-pulley arrangement having two pulleys 212 fixed to a boundary 16 of the hoistway 12, and a roller 208 located below the second counterweight G2 , led to an attachment point 213.2, where the Unterseilende 210.2 is held stationary.

The deflection rollers 104.1, 104.2 on the first, lower elevator car K1 and the deflection rollers 204.1, 204.2 on the second, upper elevator car K2 are arranged so that the ends of the support and traction means 102 of the first elevator car K1 have a smaller horizontal distance from the elevator cars K1 and K2 as the sub-ropes of the lower rope 210, which are on the same side of the Elevator shaft 12 are arranged. In a particularly preferred embodiment, the deflection rollers 104.1, 104.2 for the support and traction means 102 of the lower elevator car K1 and the deflection rollers 204.1, 204.2 for the lower cable 210 of the upper elevator car K2 are arranged such that the longitudinal axes of the guided sections of the support and traction means 102 and the lower cable 210 are at least approximately centrally symmetrical with respect to the elevator cars K1, K2 and cross each other diagonally. In general, the arrangement of all roles and attachment points and thus the leadership or the course of the support and traction means and the sub-cables or the sub-cable ends so that the forces attack at each location of the elevator cars at least approximately centrally symmetrical to the elevator cars, and that at Each location of the elevator cars enough distance between the support and traction means and the sub-cable or sub-cable ends is present.

Fig. 2A and Fig. 2B show a second embodiment of the inventive elevator installation 10. The arrangement of the first elevator car K1 with the counterweight G1, the associated support and traction means 102 and its ends 102.1 and 102.2, the guide rollers 104.1, 104.2, the roller assemblies 106 and 108, the attachment points 103.1 and 103.2 and the sub-cable 110 is the same as in the embodiment shown in the Fig. 1A and 1B is shown. The arrangement of the elevator car K2 with the counterweight G2, the associated support and tension element 202, the roller assemblies 206 and the attachment point 203 on the counterweight G2 is the same as in the embodiment which in the Fig. 1A and 1B is shown.

The embodiment of Fig. 2A and 2 B thus differs from the embodiment of Fig. 1A and 1B merely by forming the sub-cable tensioners for the sub-cable 210.

Like also in Fig. 2A and 2 B 2, the first sub-cable end 210.1 of the second elevator car K2 runs from its suspension point on the second elevator car K2 via the first deflecting roller 204.1 to the fastening point 213.1, which is fastened to the floor 16 of the hoistway 12. Preferably, this attachment point 213.1 lies above a lower cable roller arrangement with two rollers 212 on a bracket which is fixed to the floor 16 of the elevator shaft 12. The second lower cable end 210.2 of the second elevator car K2 runs from its suspension point on the elevator car K2 via the second guide roller 204.2 to a lower cable roller arrangement with two rollers 212, which are held stationary at a boundary 16 of the elevator shaft 12, from there to the guide roller 208 at the lower End of the second counterweight G2 and finally to a further attachment point 213.2 on a weighting body 224, which hangs freely on the second Unterseilende 210.2.

Fig. 3A and 3B show a third embodiment of the inventive elevator installation 10. The arrangement of the support and traction means 102, 202 of the two elevator cars K1, K2 and the arrangement of the lower cable 110 of the first elevator car K1 correspond to the respective arrangements of the second embodiment of the Fig. 2A and 2 B , The third embodiment therefore basically differs from the second embodiment only in the arrangement of the lower cable 210 of the second elevator car.

Like also in Fig. 2A and 2 B 2, the first sub-cable end 210.1 of the second elevator car K2 runs from its suspension point on the second elevator car K2 via the first deflecting roller 204.1 to the fastening point 213.1 which is fastened to the floor 16 of the hoistway 12. This fastening point 213.1 is preferably located above a roller and weighting arrangement 222 on a bracket which is fixed to the floor 16 of the elevator shaft 12. The second Unterseilende 210.2 the second elevator car K2 runs from its suspension point on the second elevator car K2 via the second guide roller 204.2 to a roller and weighting arrangement 222, which hangs free as a bottle in the elevator shaft 12 at the second lower cable end 210.2. In a preferred embodiment, this deflection and tensioning device 226 is held stationary with vertical play. From the deflection and tensioning device 226, the second lower cable end 210.2 is guided further to the deflection roller 208 at the lower end of the second counterweight G2 and finally to a further fastening point 213.2. This attachment point 213.2 is located at the bottom 16 of the elevator shaft 12.

The lower cable tensioning device of the lower cables 110, 210 of the lower and upper elevator car K1, K2 preferably has a braking device and / or blocking device which is not shown, but which is conventional. If a sub-cable 110, 210 now has such a device, a roller and weighting arrangement 122, 222 or a weighting body 214, 224 can be moved freely vertically along a guide during normal operation. The blocking device is used from a speed of an elevator car K1, K2, which is above a limit speed of, for example, 3.5 m / s. If now an elevator car K1, K2 is moved at such a high speed and then goes into capture, an associated roller and weighting arrangement 122, 222 or a weighting body 214, 224 threatens to hop. In order to prevent such hopping, the vertically guided roller and weighting arrangement 122, 222 and a weighting body 214, 224 are blocked by the braking and / or blocking device with respect to the floor 6 of the hoistway 12. For this purpose, the blocking device is designed, for example, as a hydraulic cylinder with a pressure-locking valve which is actuated when catching an associated elevator car K1, K2.

Claims (13)

1. Elevator system (10) with a first, lower elevator car (K1) and a second upper elevator car (K2), which are movable along a common travel path, wherein

   - the first elevator car (K1)

   - comprises a first supporting and traction means (102), at which it has 1:2 suspension and which has two ends (102.1, 102.2) each guided by means of a respective deflecting roller (104.1, 104.2),

   - is coupled with a first counterweight (G1) and

   - is provided with a first lower cable (110),

   - and the second elevator car (K2)

   - has a second supporting and traction means (202),

   - is coupled with a second counterweight (G2) and

   - is provided with a second lower cable (210).
2. Elevator system (10) according to claim 1, characterised in that the first lower cable (110), which is connected with the first elevator car (K1) in a 1:1 suspension and tensioned by means of a lower-cable tensioning device (110), is mounted by one lower cable end to the first elevator car (K1) and fastened by another lower cable end to the first counterweight (G1).
3. Elevator system (10) according to one of claims 1 and 2, characterised in that the second supporting and traction means (202) has 1:1 suspension and is suspended at least approximately centrally at the second elevator car (K2) and that the second lower cable (210), which is connected in a 1:2 suspension with the second elevator car (K2) and tensioned by means of a lower-cable tensioning device, has two lower cable ends (210.1, 210.2) each guided by means a respective lower cable-deflecting roller (204.1, 204.2), wherein a first lower cable end (210.1) is fastened at a first fastening point (213.1) and a second lower cable end (210.2) is fastened at a second fastening point (212.2).
4. Elevator system (10) according to any one of claims 1 to 3, characterised in that the deflecting rollers (104.1, 104.2) for the first supporting and traction means (102) and the deflecting rollers (204.1, 204.2) for the second lower cable (210) are arranged at different horizontal spacings and diagonally relative to one another with at least approximate central symmetry.
5. Elevator system (10) according to any one of claims 1 to 4, characterised in that the tensioning device of the first lower cable (110) is arranged below the supporting and traction means (102) of the first elevator car (K1).
6. Elevator system (10) according to any one of claims 1 to 5, characterised in that the tensioning device of the first lower cable (110) comprises a lower-cable roller arrangement (112) which is fastened in stationary position or with slight play at a boundary wall of an elevator shaft (12).
7. Elevator system (10) according to any one of claims 1 to 5, characterised in that a tensioning device of the first lower cable (110) comprises a roller and weighting arrangement (112) which is freely suspended as a block at the lower cable (110).
8. Elevator system (10) according to any one of claims 1 to 7, characterised in that a fastening point (213.1, 213.2) of a lower cable end (210.1, 210.2) of the second lower cable (210) lies in stationary position, for example at the base (16) of the elevator shaft (12).
9. Elevator system (10) according to any one of claims 1 to 7, characterised in that a fastening point (213.1, 213.2) of a lower cable end (210.1, 210.2) of the second lower cable (210) lies at a weighting body (214, 224) which freely hangs at the lower cable end (210.1, 210.2) and/or is held in stationary position with vertical play.
10. Elevator system (10) according to any one of claims 1 to 7, characterised in that a first fastening point (213.1) of a first lower cable end (201.1) and a second fastening point (213.2) of a second lower cable end (201.2) of the second lower cable (210) are fixed in stationary position, for example at the base (16) of an elevator shaft (12).
11. Elevator system according to one of claims 6 and 7, characterised in that the tensioning device for the second lower cable (210) comprises a lower-cable roller arrangement (226) which is held in stationary position or with small play at a boundary (16) of an elevator shaft (12).
12. Elevator system according to claim 10, characterised in that the tensioning device for the second lower cable (210) comprises a roller and weighting arrangement (222) which is freely suspended as a block in the elevator shaft (12) at the second lower cable end (210.2).
13. Elevator system (10) according to any one of the preceding claims, characterised in that at least the tensioning device of the first or second lower cable (110, 210) comprises a braking and/or blocking device, preferably with a hydraulic cylinder and a pressure blocking valve, in order to brake or keep stationary the lower cable (110, 210) when one of the two elevator cars (K1, K2) travels at a speed exceeding a predeterminable maximum speed.

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