EP1935826B1 - Lift system - Google Patents

Description

The invention relates to an elevator system according to the preamble of claim 1.

Elevator systems of this type are known, for example from the EP-1 329 412-A1 , The elevator system described therein has two elevator cars in a common elevator shaft, each with a drive and with only one common counterweight.

A disadvantage of this known system is, inter alia, that the drive or the traction for the two elevator cars is not uniform. This can lead to, for example, the support means are loaded unevenly, which is undesirable.

Likewise shows US-1,837,643-A an elevator system with two elevator cars and a counterweight.

The object of the invention is therefore to propose an elevator system of the type mentioned, with which the disadvantages of the prior art are avoided.

This object is achieved according to the invention for the elevator system of the type mentioned by the features of independent claim 1.

Preferred developments and details of the elevator system according to the invention are defined by the dependent claims.

Fig. 1A

ein erstes Ausführungsbeispiel der Erfindung, von der Seite;

Fig. 1B

das in Fig. 1A dargestellte Ausführungsbeispiel der Erfindung, gesehen von A-A' in Fig. 1A;

Fig. 1C

das in Fig. 1A dargestellte Ausführungsbeispiel der Erfindung, in einem Schnitt entlang der Linie B-B' in Fig. 1A;

Fig. 1D

die in Fig. 1A dargestellte untere Aufzugskabine, jedoch mit Befestigungsbereichen für die Tragmittelstränge im oberen Kabinenbereich;

Fig. 2

ein zweites Ausführungsbeispiel der Erfindung, mit zusätzlichen Spannmitteln, in gleicher Darstellung wie Fig. 1A; und

Fig. 3

Fig. 1B mit weiteren Einzelheiten, in vergrösserter Darstellung.

Further details and advantages of the invention will be described below by way of examples and with reference to the drawings. Show it:

Fig. 1A

a first embodiment of the invention, from the side;

Fig. 1B

this in Fig. 1A illustrated embodiment of the invention, as seen from AA 'in Fig. 1A ;

Fig. 1C

this in Fig. 1A illustrated embodiment of the invention, in a section along the line BB 'in Fig. 1A ;

Fig. 1D

in the Fig. 1A illustrated lower elevator car, but with attachment areas for the suspension element strands in the upper cabin area;

Fig. 2

A second embodiment of the invention, with additional clamping means, in the same representation as Fig. 1A ; and

Fig. 3

Fig. 1B with further details, in an enlarged view.

• Die Figuren sind nicht als massstäblich zu betrachten.
• Gleiche oder ähnliche bzw. gleich oder ähnlich wirkende konstruktive Elemente sind in allen Figuren mit gleichen Bezugszeichen versehen.
• Angaben wie rechts, links, oben, unten sind auf die jeweilige Anordnung in den Figuren bezogen.
• Umlenkrollen und umlenkende Hilfsrollen sind generell in Schnitten senkrecht zu ihren Rotationsachsen als schwarze Kreisflächen dargestellt.
• Treibscheiben sind generell in Schnitten senkrecht zu ihren Rotationsachsen als Kreislinien dargestellt.
• Diejenigen Teile bzw. Trumms von Tragmittelsträngen bzw. Spannmittelsträngen, die sich zwischen einer der Aufzugskabinen und einer oberen Gegengewichts-Umlenkrolle befinden, sind mit anderen Linien dargestellt als diejenigen Teile der Tragmittelstränge bzw. Spannmittelstränge, die sich zwischen der anderen Aufzugskabine K2 und der oberen Gegengewichts-Umlenkrolle befinden.
• Bei jedem Trumm ist ausserdem mit einer üblichen Durchmessersignatur und mit einer der Zahlen 1 oder 2 angegeben, ob es sich an den entsprechenden Stellen jeweils um einen oder um zwei Tragmittelstränge bzw. Spannmittelstränge handelt; ausserdem ist angegeben, um welche Tragmittelstränge bzw. Spannmittelstränge es sich handelt.

For the drawing and the further description generally the following applies:

• The figures are not to be considered as true to scale.
• The same or similar or the same or similar acting structural elements are provided in all figures with the same reference numerals.
• Information such as right, left, top, bottom are related to the respective arrangement in the figures.
• Pulleys and deflecting auxiliary rollers are generally shown in sections perpendicular to their axes of rotation as black circular surfaces.
• Traction sheaves are generally shown in sections perpendicular to their axes of rotation as circular lines.
• Those portions of suspending strands located between one of the elevator cars and an upper counterweight deflector are shown with different lines than those portions of the stringer strands located between the other elevator car K2 and the upper counterweight -Umlenkrolle be located.
• Each Trumm is also indicated with a standard diameter signature and with one of the numbers 1 or 2, whether it is in the appropriate places each is one or two suspension element strands or tensioner strands; In addition, it is indicated which suspension element strands or tensioning element strands are involved.

The Fig. 1A . 1B and 1C show a first embodiment of an elevator system 10 according to the invention. These are highly schematic side views or sections, by means of which the basic elements of the invention will be explained.

A lower elevator car K1 and an upper elevator car K2 of the new elevator system 10 are located one above the other in a common elevator shaft 11. In the elevator shaft 11 is also a common counterweight 12. The counterweight 12 is at an upper counterweight Umlenkrollenanordnung 12.1 in a so-called 2: 1 suspension suspended. The term of a counterweight deflection roller is also to be understood as meaning a roller arrangement having more than one roller. With v1 a speed of the lower elevator car K1, with v2 a speed of the upper elevator car K2 and with v3 a speed of the counterweight 12 is indicated.

In the upper region or above the actual elevator shaft 11 are drive means for driving the two elevator cars. The drive means comprise a first drive arrangement for the lower elevator car K1 and a second drive arrangement for the upper elevator car K2.

The first drive arrangement associated with the lower elevator car K1 comprises a first motor M.A1 and a second motor M.B1. The motors M.A1 and M.B1 are synchronized (eg electric or electronic). The first motor M.A1 is coupled to a first traction sheave 13.A1. The second motor M.B1 is coupled to a second traction sheave 13.B1.

The second drive arrangement, which is associated with the upper elevator car K2, has a third motor M.AB2. The third motor M.AB2 is coupled via a common shaft to a third traction sheave 13.A2 and a fourth traction sheave 13.B2. That is, in this preferred embodiment, a common motor M.AB2 is provided for driving two traction sheaves 13.A2 and 13.B2. However, two separate motors can also be used here.

The new elevator system 10 further comprises a flexible support means TA, TB, which essentially consists of a first suspension element strand TA and a second suspension element strand TB. The suspension element strands TA and TB each have a first end and a second end. Advantageously, each of the suspension element strands TA and TB is formed by two or more parallel suspension element elements, for example by two straps or two cables. However, each suspension element strand TA and TB may also comprise only one strap or one rope. The supporting structure of these suspension element strands TA and TB is advantageously made of steel, aramid or Vectran.

In the present exemplary embodiment, the first traction sheave 13.A1 and the second traction sheave 13.A2 are assigned to the first suspension element line TA, while the third traction sheave 13.B1 and the fourth traction sheave 13.B2 are assigned to the second suspension element line TB.

The motor M.A1 and the traction sheave 13.A1 for the lower elevator car K1 are arranged at a first height. The motor M.B1 and the traction sheave 13.B1, also for the lower elevator car K1, are arranged at a second height. The motor M.AB2 and the traction sheaves 13.A2 and 13.B2 for the upper elevator car K2 are also arranged in the second height. The second altitude is below the first altitude. This arrangement is advantageous but not mandatory.

The elevator system 10 may also have four motors, in which case each traction sheave or each end of the suspension element strands is assigned its own motor. However, it is essential for the desired uniform traction that each end of the suspension element strands is assigned its own traction sheave in order to be able to introduce the driving forces equally into the suspension element strands TA, TB.

Furthermore, the new elevator system 10 comprises a plurality of deflection rollers, in the present example a first deflection roller 14.A1, a second deflection roller 14.A2 for the first suspension element line TA, a third deflection roller 14.B1 for the second suspension element line TB, and a fourth deflection roller 14. A3, 14.B2 for the two suspension element strands TA and TB.

The lower elevator car K1 has in its lower cabin area B1 a first attachment area 15.1 and a second attachment area 15.11, which are arranged laterally on opposite sides of the elevator car K1.

The upper elevator car K2 has in its upper cabin area on a third mounting portion 15.2 and a fourth mounting portion 15.22, which are arranged at least approximately centrally and practically coincide in the present embodiment at 15.2 / 15.22 practically. In Fig. 1A they are shown for reasons of clarity of drawing without horizontal distance.

At the lateral attachment areas 15.1, 15.11 of the lower elevator car K1 and at the central attachment point 15.2 / 15.22 of the upper elevator car K2, the suspension element strands TA, TB are fixed, such that each of the elevator cars K1 and K2 is suspended from both suspension struts TA and TB. The elevator cars K1 and K2 are in such a way Suspended 1: 1 suspension to the suspension element strands TA and TB, as described in detail below. The first suspension element strand TA runs from the first attachment region 15.1 to the lower elevator car K1, where it is fastened by its first end, upwards and directly to the first traction sheave 13.A1. From the latter, the first suspension element strand TA runs, for example, via the first deflection roller 14.A1 and the second deflection roller 14.A2 downwards to the upper counterweight deflection roller 12.1. From the latter, the first propellant strand TA runs upwards, via the deflection roller 14.A3 on to the third traction sheave 13.A2, and from this directly to the central attachment region 15.2 / 15.22 on the upper elevator car K2, where it is fastened with its second end.

The second suspension element strand TB runs upwards from the second fastening region 15.11 on the lower elevator car K1 and directly to the second traction sheave 13.B1. From the latter, the second suspension element strand TA runs via the fourth deflection roller 14.B1 downwards to the upper counterweight deflection roller 12.1. From the latter, the second propellant strand TA runs upwards, via the deflection roller 14.B2 on to the fourth traction sheave 13.B2 and from this directly to the central attachment point 15.2 / 15.22 on the upper elevator car K2.

Immediately to the upper counterweight pulley 12.1 and from this away, the two suspension element strands TA and TB run parallel.

Fig. 1C shows how the force is introduced by the suspension element strands TA and TB for the elevator car K1. Fig. 1D shows an alternative to it.

The Fig. 1A . 2 and 3 show an advantageous arrangement of the traction sheaves 13.A1, 13.B1, 13.A2, 13.B2 in the uppermost region of the elevator shaft 11. The traction sheaves 13.A1, 13.B1, 13.A2, 13.B2 are vertical, that means with horizontal axes, like out Fig. 3 visible, arranged.
A guide device for the vertical guidance of the cabins K1 and K2 in the elevator shaft 11 comprises two stationary guide rails 19.1 and 19.11 which extend vertically along opposite sides of the elevator shaft 11 and are fastened thereto in a manner not shown. The guide device also includes guide bodies, not shown. On both sides of each of the cabs K1 and K2 preferably two guide bodies are mounted in a vertically aligned arrangement, which cooperate with the respective guide rails 19.1 and 19.11. The guide body on one side of the cabs K1, K2 are advantageously mounted in as large a height as possible. The guide rails 19.1 and 19.11 are arranged above the counterweight 12.

Another guide device with two guide rails 19.2, 19.22 is arranged in the region of the narrow sides of the counterweight 12 and serves to guide the counterweight 12th

The first suspension element strand TA, starting from the first fastening point 15.1 on the lower elevator car K1, runs along the same side of the elevator shaft 11 as the guide rail 19.1. The second suspension element strand TB, starting from the second fastening point 15.11 on the lower elevator car K1, runs along the same side of the elevator shaft 11 as the guide rail 19.11.

Fig. 1C shows the same lower elevator car K1, but with the attachment points 15.1 and 15.11 in the upper cabin area.

Fig. 2 shows a second embodiment of the invention. This includes all with respect to the Fig. 1A . 1B and 1C described constructive elements and an additional device to the suspension element strands TA and TB better tension and the elevator cars K1 and K2 and the counterweight 12 to perform better.

The elevator system 10 according to Fig. 2 includes for this purpose a lower counterweight pulley 12.2, which is suspended from the counterweight 12. Centrally located at the lower area B1 of the lower elevator car K1 are a fifth mounting area 15.3 and a sixth mounting area 15.33, which practically coincide at 15.3 / 15.33.

At the lower area B2 of the upper elevator car K2 are laterally, on opposite sides of the elevator car K2, a seventh attachment point 15.4 and an eighth attachment point 15.44. The seventh attachment point 15.4 and the eighth attachment point 15.44 are in the present embodiment close to those sides of the elevator shaft 11, on which the guide rails 19.1, 19.11 extend.

Alternatively, the seventh and eighth fastening points 15.4, 15.44 are located in the upper region of the elevator car K2.

A flexible tensioning means SA, SB essentially consists of a first tensioning medium strand SA and a second tensioning medium strand SB. Each of the tensioner strands SA and SB has a first end and a second end. Advantageously, each of the tensioning means strands SA, SB is formed by two or more parallel clamping means elements, such as by two belts or two cables. However, each suspension element strand SA, SB may also comprise only one belt or one rope. The load-bearing structure of these suspension element strands SA, SB is advantageously made of steel, aramid or Vectran.

The first and second attachment regions 15.1, 15.11 and the fifth and sixth attachment regions 15.3, 15.33 are located together in the lower region B1 of the cabin K1 or depending on a lower area B1 or upper area of the cabin K1. If the first and second fastening regions 15.1, 15.11 are located in the upper region of the cabin K1, the advantage lies in the use of shorter suspension element strands TA, TB. If the first and second fastening areas 15.1, 15.11 are located together with the fifth and sixth fastening areas 15.3, 15.33 in the lower area B1 of the cabin K1, the advantage lies in the simple construction of the cabin K1. The force-introducing structure consists essentially of a simple bar.

Analogous reasoning also applies to the third, fourth, seventh and eighth attachment areas 15.2, 15.22, 15.4, 15.44, which are located either together in the upper area of the cabin K2 or each in an upper area or lower area B2 of the cabin K2. If the seventh and eighth attachment areas 15.4, 15.44 are located in the lower area B2 of the cabin K2, the advantage lies in the use of shorter tensioning means strands SA, SB. If the seventh and eighth attachment regions 15.4, 15.44 together with the third and fourth attachment regions 15.2, 15.22 are located in the upper region of the cabin K2, the advantage lies in the simple design of the cabin K1. The force-introducing structure consists essentially of a simple bar.

Furthermore, a plurality of deflecting rollers are arranged in the lower region of the elevator shaft 11. Provided are two tension rollers 16.A1, 16.A2 for the first tensioning means TA and two tensioning rollers 16.B1, 16.B2 for the second tensioning means TB. In addition, two auxiliary rollers 17.A1 and 17.A2 are provided for the first tensioning means TA and two auxiliary rollers 17.B1, 17.B2 for the second tensioning means TB. In addition, a biasing arrangement 16 is provided.

The first tensioning medium strand SA is with its first end at the central fastening region 15.3 / 15.33 of the lower Elevator car K1 attached and runs from there to the tension rollers 16.A1 and 16.A2 to the lower counterweight pulley 12.2. From the lower counterweight deflection roller 12.2, the first tensioning means strand SA runs via the deflection rollers 17.A1 and 17.A2 to the seventh fastening region 15.4 on the upper elevator car K2, where it is fastened by its second end.

The second tensioning means SB is fastened with its first end to the central fastening region 15.3 / 15.33 of the lower elevator car K1 and runs from there around the tensioning rollers 16.B1 and 16.B2 to the lower counterweight deflection roller 12.2. From the lower counterweight deflection roller 12.2, the second tensioning means SB passes via the deflection rollers 17.B1 and 17.B2 to the eighth fastening area 15.44 at the upper elevator car K2, where it is fastened with its second end.

Fig. 3 is an enlarged view of the Fig. 1B in which details are shown, in Fig. 1C not appear or not clear. Shown in particular are a first vertical center plane E1, a second vertical center plane E2, a first vertical diagonal plane D1 and a second vertical diagonal plane D2.

The first attachment area 15.1 and the second attachment area 15.11 are in the lower cabin area on opposite sides of the lower elevator car K1, on opposite sides of the first vertical center plane E1 and on opposite sides of the second vertical center plane E2, by a substantially centrally symmetric, ie balanced, force introduction to ensure in the elevator car K1 (in Fig. 3 not recognizable). This balanced introduction of force has the advantage that it comes to less friction and wear on the guide rails. In addition, the occurrence of audible or noticeable blows while driving is significantly reduced.

The attachment area 15.2 / 15.22 is located centrally on the upper cabin area of the upper elevator car K1, so that here too a centric introduction of force takes place (in Fig. 3 not recognizable).

Fig. 3 also shows that at least three motors M.AB2, M.A1, M.B1 are provided for driving the four traction sheaves 13.A, 13.A2, 13.B1, 13.B2. In an alternative arrangement, not shown here, the elevator system 10 additionally has a fourth motor, which drives the traction sheave 13.B2. In this alternative arrangement, each drive pulley 13.A, 13.A2, 13.B1, 13.B2 is thus assigned a motor. Compared to conventional elevator systems in which each elevator car is assigned an engine, in the example shown, each car K1, K2 is allocated up to two motors M.AB2, M.A1, M.B1. Accordingly, the single motor must generate up to half the torque and can thus be designed much smaller. The advantage of such an arrangement is an extremely flexible and space-saving positioning of the motors M.AB2, M.A1, M.B1 in the upper region of the elevator shaft 11.

By means of the deflection rollers 14.A1, 14.A2, 14.A3, 14.B1, 14.B2 are the suspension element strands TA, TB each of the traction sheaves 13.A, 13.A2, 13.B1, 13.B2 above the elevator car K2 led to the rear side of the elevator shaft 11 and from there laterally deflected past the elevator cars K1, K2 in the direction of the counterweight 12. These additional pulleys allow the use of small traction sheaves 13.A, 13.A2, 13.B1, 13.B2. Small traction sheaves have the advantage that 10 lower drive torques are required for the operation of the elevator system. Accordingly, smaller motors can be used. This results in a further even more flexible and space-saving positioning of the motors, traction sheaves and pulleys in the upper region of the hoistway 11.

Thanks to the small dimensions of the traction sheaves 13.A, 13.A2, 13.B1, 13, these traction sheaves can also be arranged obliquely with respect to the center plane E2. In the example shown, the traction sheaves 13.A1, 13.B1 are in particular at an angle to one another and, in conjunction with the associated deflection rollers 14.A1, 13.A2, 14.B1, permit a corresponding oblique guidance of the suspension element struts TA, TB above the elevator car K2 towards Projection of the upper counterweight pulley 12.1. The advantage of this oblique converging guide is the use of small upper counterweight pulleys 12.1

The fact that both cabs K1, K2 are connected via common support means TA, TB with only one counterweight 12 and by the special nature of the 1: 1 suspension of the cabins K1, K2 and the 2: 1 suspension of the counterweight 12, results in different speeds v1, v2 and v3, depending on the driving situation. If car K1 is moving upwards at speed v1 while car K2 is resting, counterweight 12 will move downwards at v3 = v1 / 2. If cabin K2 moves downwards at speed v2 while cabin K1 is at rest, counterweight 12 moves upwards with v3 = v2 / 2. If the cars K1, K2 move towards each other with the same speed v1 = v2, then v3 is zero. If the car K1 and the car K2 move downwards at the same speed v1 = v2, the counterweight 12 moves upwards with v3 = v1 = v2.

Claims (11)

1. Lift system (10) with

   - a lower lift cage (K1),

   - an upper lift cage (K2)

   - a common counterweight (12),

   - a support means (TA, TB) for supporting the lower and upper lift cages (K1, K2),

   - drive means for driving the lower and upper lift cages (K1, K2),

   - and a common lift shaft (11) in which the upper lift cage (K2) and the lower lift cage (K1) vertically move independently of one another and in which the drive means are arranged,

   wherein
   the support means (TA, TB)

   - comprises a first support means strand (TA) with a first and a second end and

   - a second support means strand (TB) with a first and a second end,

   wherein

   - the drive means comprise four drive pulleys (13.A1, 13.A2, 13.B1, 13.B2) which are so arranged

   - that the first drive pulley (13.A1) and the second drive pulley (13.A2) are associated with the first support means strand (TA) and

   - that the third drive pulley (13.B1) and the fourth drive pulley (13.B2) are associated with the second support means strand (TB),

   characterised in that the drive means comprise a first motor (M.A1) for driving the first drive pulley (13.A1), a second motor (M.B1) for driving the third drive pulley (13.B1) and a third motor (13.AB2) for driving the second drive pulley (13.A2) and the fourth drive pulley (13.B2) by way of a common shaft.
2. Lift systems (10) according to claim 1, characterised in that the lower lift cage (K1) is suspended in balanced state at two separate mutually opposite fastening regions (15.1, 15.11), wherein the first end of the first support means strand (TA) is fixed to a first side region (15.1) and wherein the first end of the second support means strand (TB) is fixed to a second fastening region (15.11).
3. Lift system (10) according to claim 1 or 2, characterised in that the upper lift cage (K2) is suspended in a common central upper fastening region (15.2, 15.22) at a second end of the first support means strand (TA) and a second end of the second support means strand (TB).
4. Lift system (10) according to claims 1, 2 or 3, characterised in that the drive means comprise four motors, namely one motor per drive pulley (13.A1, 13.A2, 13.B1, 13.B2).
5. Lift system (10) according to claim 3, characterised in that the mutually opposite fastening regions (15.1, 15.11) are disposed in a lower cage region (B1) of the lower lift shaft (K1).
6. Lift system (10) according to claim 3, characterised in that the mutually opposite fastening regions (15.1, 15.11) are disposed in an upper cage region of the lower lift shaft (K1).
7. Lift system (10) according to claim 3, 5 or 6, characterised in that the central fastening region (15.2/15.22) is disposed in an upper cage region of the upper lift cage (K2).
8. Lift system (10) according any one of the preceding claims, characterised in that tensioning means (16, 16.A1, 16.A2, 16.B1, 16.B2, 17.A1, 17.A2, 17.B1, 17.B2, SA, SB) are provided which exert downwardly directed tension forces on the lower lift cage (K1) and on the upper lift cage (K2) and are connected with the counterweight (12) by way of one or more lower counterweight deflecting rollers (12.2).
9. Lift system (10) according to claim 8, characterised in that the tensioning means (16, 16.A1, 16.A2, 16.B1, 16.B2, 17.A1, 17.A2, 17.B1, 17.B2, SA, SB) comprise a biasing means (16) with two tensioning rollers (16.A1, 16.A2) for a first tensioning means strand (SA) and with a two further tensioning rollers (16.B1, 16.B2) for a second tensioning means strand (SB).
10. Lift system (10) according to claim 9, characterised in that the tensioning means strands (SA, SB) are formed from cables or belts.
11. Lift system (10) according to any one of the preceding claims, characterised in that the support means strands (TA, SA) are formed from cables or belts

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