Elevator system with two carriages and two counterweights

Abstract

The present invention relates to an elevator system (100) comprising an elevator shaft (1), a first car (2.1), a second car (2.2), a first counterweight (11.1) connected to the first car (2.1) via a first support element (7.1), and a second counterweight (11.2) connected to the second car (2.2) via a second support element (7.2), wherein the first counterweight (11.1) and the second counterweight (11.2) are guided one above the other in a first pair of guide rails (14) and extend within a common envelope cross-section (13), wherein the first counterweight (11.1) accommodates weight elements in a first width region (B.1) or first depth region (T.1) of the envelope cross-section (13) and is designed as a pure support structure in a second width region (B.2) or second depth region (T.2) of the envelope cross-section (13) and at least a first recess from the envelope cross-section (13) and wherein in the second width area (B.2) or second depth range (T.2) and within the first recess (18.1) the second support means (7.2) is guided.

Description

Technical field

[0001] The present invention relates to an elevator system for transporting persons and / or goods, comprising a vertically extending elevator shaft, a first car movable along the elevator shaft, a second car movable along the elevator shaft, a first counterweight connected to the first car via a first support means and a second counterweight connected to the second car via a second support means. Background of the invention

[0002] Elevator systems with multiple cars that can travel and be guided in the same elevator shaft are known from the prior art. Such elevator systems are marketed, for example, by the applicant under the name "TWIN," where the cars are arranged one above the other. With such systems, a single elevator shaft can be utilized more efficiently compared to a single-car system, thus reducing waiting times.

[0003] In known elevator systems, both with a single car and with two cars that move independently within a single elevator shaft, it is known that each car is connected to a counterweight via load-bearing elements. In elevator systems with two cars, the two counterweights are typically guided along separate walls of the elevator shaft, partly to avoid conflict between the two load-bearing elements, for which the elevator shaft must provide sufficient space.

[0004] It is also known to guide several counterweights along the same wall of the elevator shaft, either side by side or, as known from EP 1 935 828 A1 or JP S 59153773 A, one above the other. However, these known solutions are disadvantageously complex and structurally very expensive. Description of the invention

[0005] Starting from the situation described above, it is an object of the present invention to propose a simplified elevator system with two elevator cars and counterweights assigned to the respective elevator cars in an elevator shaft.

[0006] The object of the invention is achieved by the features of the independent main claims. Advantageous embodiments are specified in the dependent claims. Where technically feasible, the teachings of the dependent claims can be combined arbitrarily with the teachings of the main and dependent claims.

[0007] In particular, the problem is solved by an elevator system for transporting persons and / or goods, comprising a vertically extending elevator shaft, a first car movable along the elevator shaft, a second car movable along the elevator shaft, a first counterweight connected to the first car via a first support element, and a second counterweight connected to the second car via a second support element, wherein the first counterweight and the second counterweight are guided one above the other in a first pair of guide rails and each extend within a common envelope cross-section, with the first counterweight being arranged above the second counterweight.wherein the first counterweight accommodates weight elements in a first width or depth region of the envelope cross-section and is designed as a pure load-bearing structure in a second width or depth region of the envelope cross-section and has at least a first recess from the envelope cross-section and wherein the second load-bearing element is guided in the second width or depth region and within the first recess.

[0008] Advantageous aspects of the claimed invention are explained below, followed by a description of preferred modified embodiments of the invention. Explanations, particularly regarding advantages and definitions of features, are essentially descriptive and preferred examples, but not limiting ones. If an explanation is limiting, this will be expressly stated.

[0009] Where elements are designated by means of a numbering system, for example, "first element," "second element," and "third element," this numbering is solely for differentiation purposes and does not imply any dependency between the elements or a mandatory sequence. This means, in particular, that a device or method does not need to have a "first element" to have a "second element." The device or method can also have a "first element" and a "third element" without necessarily having a "second element." Multiple units of an element with a single numbering system are also possible, for example, multiple "first elements."

[0010] The elevator shaft of the elevator system extends, at least in sections, in a vertical direction. The elevator shaft preferably has a clear cross-section that is substantially filled by a single elevator car, preventing the two cars from passing each other. Accordingly, the cars are always arranged one above the other. In particular, appropriate safety devices ensure that the cars cannot collide and are always sufficiently spaced apart. The elevator shaft may also have a passing position or parking position above a top floor and / or below a bottom floor, into which the corresponding upper or lower car can be moved to allow the other car access to the top or bottom floor.

[0011] A load-bearing element is in particular designed as a rope, strap, chain or the like and carries tensile loads in the direction of its longitudinal extent. Preferably, several redundant load-bearing elements may also be arranged in parallel, whereby in such an arrangement all parallel redundant load-bearing elements are included with the term "load-bearing element" as used here, or it is clear from the context if only individual load-bearing elements are meant.

[0012] Each suspension element is, for example, attached to the elevator car at one end, guided vertically to an associated drive in a machine room located at the top of the elevator shaft or in the shaft head, where it is deflected and driven, then guided vertically again to the associated counterweight and attached to the counterweight at the other end. This is then a 1:1 suspension. The end attachment to the counterweight and / or the elevator car can be split across two contact points, or two parallel suspension elements can engage the counterweight at different contact points.

[0013] Alternatively, a lifting element is attached at one end to a suspension point in the machine room or the shaft head and guided vertically from there to the associated car. There, the lifting element is deflected, for example, by a deflection pulley or pulleys, and again guided vertically to the associated drive unit in the machine room or shaft head, where it is deflected and driven. From the drive unit, the lifting element then runs vertically to the associated counterweight, where it is deflected once more and guided vertically to another shaft-side suspension point. This is then a 2:1 suspension. Other alternative suspension configurations are known to those skilled in the art and are implicitly included in the present description.

[0014] A counterweight is typically designed as a flat body, i.e., with the shallowest possible depth, which is positioned as close as possible to a wall of the elevator shaft along the first guide rails. This allows the remaining cross-section of the elevator shaft to be used for the movement of the elevator cars, enabling the cars to be designed with the largest possible footprint or interior space to accommodate as many people or bulky goods as possible. Accordingly, counterweights are designed with relatively large dimensions in height and / or width, achieving a mass that is, for example, roughly equivalent to the empty weight plus half the load capacity of the associated elevator car.The counterweight therefore extends essentially only in the plane defined by the first pair of guide rails, with a shallow depth, perpendicular to this plane. The plane between the guide rails of the first pair of guide rails extends, in particular, parallel to the wall of the elevator shaft. A counterweight is formed by a supporting structure and weight elements held by the supporting structure. The stability of the counterweight is determined by the supporting structure itself. In particular, the supporting structure also includes means for guiding the counterweight within the first pair of guide rails.

[0015] A common cross-sectional area encompassing the counterweights is defined as a section in both the width and depth directions, i.e., a section orthogonal to the vertical extent of the elevator shaft. The cross-sectional area encompassing the shaft is defined as the area within which either the first or the second counterweight extends, i.e., as the intersection of the areas occupied by the respective counterweights. In other words, the cross-sectional area encompassing the shaft is the cross-section required to pass through either the first or the second counterweight.

[0016] A purely load-bearing structure includes, for example, structural struts, structural plates and / or tension members that form a sufficiently stable structure to stably form the counterweight in itself and guide it without twisting in the guide rails of the first pair of guide rails.

[0017] According to the present understanding, a width area refers to a continuous portion of the width within the cross-section of the enclosure and between the guide rails of the first pair of guide rails. According to the present understanding, a depth area refers to a continuous portion of the depth within the cross-section of the enclosure, where the depth extends perpendicular to the plane spanned by the guide rails of the first pair of guide rails.

[0018] The aforementioned elevator system incorporates the principle that the upper first counterweight has a recess in its cross-section, either in a certain width or depth, which allows the second load-bearing element to be guided within this cross-section. The second counterweight covers the recess of the first counterweight and forms a point of application, or several points of contact, within this area of ​​the cross-section, where the second load-bearing element engages. Specifically, the center of gravity of the second counterweight lies within this area, and the second load-bearing element engages at this center of gravity. According to the aforementioned principle, the second load-bearing element does not need to be guided in front of, beside, or behind the first counterweight, but can be guided within the cross-section of the structure, i.e., within the space occupied by the counterweights, thus eliminating the need for additional installation space.Furthermore, a reduction in the available width or depth for the weight elements between the guide rails can be compensated for by increasing the height of the first counterweight without significant disadvantages for the elevator system. The initial width or depth range can then accommodate a sufficient number of weight elements to achieve an adequate counterweight mass. Ultimately, the second load-bearing element is guided with sufficient freedom by the aforementioned design against the first counterweight to prevent collisions or potential damage to the second load-bearing element, the first counterweight, or other elevator system components. Overall, a compact, cost-effective, and simple guidance system for the load-bearing elements is achieved, enabling the counterweights to be guided one above the other in the same pair of guide rails in a particularly compact, simple, and safe manner.

[0019] In one embodiment of the elevator system, two strands of the second suspension element are guided in the second width or depth section and within the first recess. These are, in particular, a strand running towards the counterweight and a strand running away from the counterweight of the same suspension element in a 2:1 suspension where a deflection device such as a pulley is provided on the counterweight. Alternatively, the two strands can also be redundant strands of a suspension element or redundant suspension elements, each attached directly to the elevator car in accordance with a 1:1 suspension. Advantageously, the multiple strands can be guided parallel in a simple and safe manner in the second width or depth section and within the first recess.

[0020] In one embodiment of the aforementioned elevator system, the second load-bearing element is guided by a deflection pulley arranged on the second counterweight. The two strands are then connected to each other at the deflection pulley and deflected there. The deflection pulley is arranged on the second counterweight such that both contact points lie within an area covering the first recess, allowing an incoming and an outgoing strand of the load-bearing element deflected at the deflection pulley to each pass within the first recess of the first counterweight or through the first counterweight, respectively.

[0021] In another embodiment of the elevator system, the second counterweight extends over the first recess in the second width or depth range. In this way, an attachment point for the second lifting element can be easily formed on the second counterweight within the overlap. In particular, the center of gravity of the second counterweight is located within the overlap of the first recess.

[0022] In a preferred embodiment of the elevator system, the first counterweight is connected to the first car via a first lower rope, wherein the second counterweight accommodates weight elements in a third width or depth region of the enclosing cross-section and is designed as a pure support structure in a fourth width or depth region of the enclosing cross-section, and has at least a second recess in the enclosing cross-section, wherein the first lower rope is guided in the fourth width or depth region and within the second recess. The lower rope associated with the upper first counterweight is therefore guided along or past the second counterweight in the same way as the second support element is guided along or past the first counterweight. In particular, the first lower rope is fixed to the first counterweight in line with the first support element.The first lower rope serves to keep the first load-bearing element under tension, particularly in conjunction with a rope tensioning device, which is, for example, located in a shaft pit. The term "lower rope" is to be understood as meaning that it can refer not only to an actual rope but also to another load-bearing element such as a strap, chain, or the like. In particular, the first lower rope corresponds in its properties to the first load-bearing element.

[0023] In one embodiment of the aforementioned elevator system, two strands of the first lower rope are guided in the fourth width or depth section and within the second recess. These are, in particular, redundant strands of a suspension element or redundant suspension elements, each attached directly to the elevator car. Advantageously, the multiple strands can be guided parallel within the second recess in a simple and safe manner.

[0024] In a further embodiment of the aforementioned elevator system, the first counterweight extends over the second recess in the fourth width or depth range. This allows for a simple attachment point for the first lower rope on the first counterweight to be formed within the overlap. In particular, the center of gravity of the first counterweight is located within the overlap of the second recess.

[0025] In a further embodiment of the aforementioned elevator system, the third width range corresponds to the second width range and / or the fourth width range corresponds to the first width range, or the third depth range corresponds to the second depth range and / or the fourth depth range corresponds to the first depth range. This results in an equal division of the width or available depth provided between the first pair of guide rails. Alternatively, the first width range has the same extent as the third width range, and the second width range has the same extent as the fourth width range, or the first depth range has the same extent as the third depth range, and the second depth range has the same extent as the fourth depth range, with the third width range and the fourth width range being, respectively,The third and fourth depth ranges are arranged in reverse order with respect to the first and second width ranges, and the first and second depth ranges, respectively. In both configurations, the first and second support elements can be offset from each other, with the first support element being held against the first counterweight in the first width range or first depth range. Similarly, the first lower rope and a second lower rope associated with the second counterweight can be offset from each other, with the second lower rope being held against the second counterweight in the third width range or third depth range. Furthermore, the offset arrangement of the respective width ranges or depth ranges ensures that the support elements and lower ropes are each located within the width range or depth range.

[0026] The weight elements can be attached to the respective counterweights in the depth range. The lifting elements or lower cables can then be easily positioned at the center of gravity of the respective counterweight, so that the counterweights run in the guide rails without lateral forces.

[0027] In a further embodiment of the elevator system, the first recess is completely enclosed by the support structure of the first counterweight in the second width or depth range, and / or the second recess is completely enclosed by the support structure of the second counterweight in the fourth width or depth range. The support structure then completely surrounds the lifting element or lower rope guided within it. The support structure can then be symmetrically constructed, and any displacement of the lifting element or lower rope from the enclosure cross-section is prevented.

[0028] In another embodiment of the elevator system, the first recess and / or the second recess are open on one side of the first counterweight and / or the second counterweight, respectively. The supporting structure is then designed, for example, as a single strut or as several struts extending only on one side of the lifting element or the lower rope, and is therefore particularly simple in design.

[0029] In yet another embodiment of the elevator system, which has already been partially described, the second counterweight is connected to the second car via a second lower rope. The same understanding of terms is applied to the second lower rope as described above for the first lower rope. The second lower rope is then preferably fixed to the second counterweight in the third width or depth range and, in particular, in line with the second suspension element.

[0030] In yet another embodiment of the elevator system, it has at least one protective device to prevent contact between the first and second counterweights. This protective device is designed, in particular, as a damper or a braking device and includes, for example, a proximity sensor. Furthermore, the protective device can also prevent contact between at least one counterweight and an end of the elevator shaft.

[0031] In yet another embodiment of the elevator system, the first and second cars are guided one above the other in a second pair of guide rails, with the first car positioned below the second. This arrangement of the lower car to the upper counterweight, and vice versa, has the advantage that the first counterweight can be moved to the upper end of the elevator shaft when the first car is in its lowest position. Furthermore, assigning both cars to the same second pair of guide rails eliminates the need for an additional guide rail, resulting in a simpler elevator system with fewer components. Brief description of the drawings

[0032] The invention 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.

[0033] The drawings show Fig. 1 a schematic view of an elevator system according to a preferred embodiment; Fig. 2 a schematic front view of the counterweights of an elevator system according to a preferred embodiment; Fig. 3a a schematic front view of the counterweights of an elevator system according to a preferred embodiment; Fig. 3b a schematic top view of a machine room of the elevator system according to Fig. 3a; Fig. 3c a schematic cross-sectional view of the counterweights of the elevator system according to Fig. 3a and Fig. 3b; Fig. 4a a schematic front view of the counterweights of an elevator system according to a further preferred embodiment; Fig. 4b a schematic top view of a machine room of the elevator system according to Fig. 4a; Fig. 4c a schematic cross-sectional view of the counterweights of the elevator system according to Fig. 4a and Fig. 4b; Fig. 5a a schematic front view of the counterweights of an elevator system according to a further preferred embodiment; Fig. 5b a schematic top view of a machine room of the elevator system according to Fig. 5a; Fig. 5c a schematic cross-sectional view of the counterweights of the elevator system according to Fig. 5a and Fig. 5b; Fig. 6a a schematic front view of the counterweights of an elevator system according to a further preferred embodiment; Fig. 6b a schematic top view of a machine room of the elevator system according to Fig. 6a; Fig. 6c a schematic cross-sectional view of the counterweights of the elevator system according to Fig. 4a and Fig. 4b; Fig. 7a a schematic top view of a machine room of the elevator system according to a further preferred embodiment; Fig. 7b a schematic cross-sectional view of the counterweights of the elevator system according to Fig. 7a; Fig. 8a a schematic top view of a machine room of an elevator system; and Fig. 8b a schematic cross-sectional view of the counterweights of the elevator system according to Fig. 8a. Detailed description of the drawings

[0034] The described embodiments are merely examples that can be modified and / or supplemented in various ways within the scope of protection defined by the claims. Each feature described for a specific embodiment can be used independently or in combination with other features in any other embodiment.

[0035] Any feature described for an embodiment of a particular claim category can also be used in a corresponding manner in an embodiment of another claim category.

[0036] Fig. Figure 1 shows a first embodiment of an elevator system 100 in a view from the direction of a front wall. The elevator system 100 has an elevator shaft 1 extending in a vertical direction V and comprising a first side wall 1.1, a second side wall 1.2, a rear wall 1.3, and the front wall (not shown). The elevator shaft 1 is closed in the vertical direction V by a pit 1.4 and a head 1.5. A first car 2.1 and a second car 2.2 are arranged in the elevator shaft 1, with the first car 2.1 being located below the second car 2.2. The cars 2.1 and 2.2 each have an access door 3.1 and 3.2, respectively, and are each held in a frame 4.1 and 4.2. The frames 4.1, 4.2 each engage with guide means not shown in detail in guide rails 5.1, 5.2 of a second pair of guide rails 5 and are guided along the second pair of guide rails 5 in the elevator shaft 1.Above the elevator shaft 1 is a machine room 6.

[0037] To move the elevator cars 2.1, 2.2 along the elevator shaft 1 in the vertical direction V, the elevator cars 2.1, 2.2 are driven by suspension elements 7.1, 7.2. The first suspension element 7.1 is attached at one end to a first suspension 8.1 located in the machine room 6. From the first suspension 8.1, the first suspension element 7.1 extends downwards in the vertical direction V to the first elevator car 2.1. Pulleys 9.1, 9.2 are arranged on the first frame 4.1, with the first suspension element 7.1 being deflected from the first suspension 8.1 into the horizontal direction H at the pulley 9.1 and running transversely to the pulley 9.2. At the second deflection pulley 9.2, the first support element 7.1 is again deflected in the vertical direction V and guided to a first drive 10.1, by means of which it is deflected and driven. From the first drive 10.1, the first support element 7.1 is then again directed downwards to a first counterweight 11.1 led, with the first counterweight 11.1 on the first side wall 1.1 in the in . Fig. The first guide rail pair 14 (not shown in detail) is guided. At the first counterweight 11.1, the first support element 7.1 is deflected at a first deflection pulley 12.1 and again guided in the vertical direction V to a second suspension located in the machine room 6, where it is attached. The return path and the second suspension are shown in the Fig. The view shown in Figure 1 is obscured and therefore not shown in detail. The first car 2.1 is consequently suspended in a 2:1 ratio. The Fig. The suspension conditions shown in Figure 1 are purely exemplary.

[0038] The second suspension element 7.2 is attached at one end to the second car 2.2 and runs from there vertically upwards in direction V to the machine room 6. In the machine room 6, the second suspension element 7.2 is deflected and driven by a second drive 10.2 and then runs again vertically downwards in direction V to a second counterweight 11.2, which is located on the first side wall 1.1 in a Fig. The first pair of guide rails 14, not shown in detail, is guided. The second car 2.2 is suspended in a 1:1 ratio. The in Fig. The suspension conditions shown in Figure 1 are purely exemplary. Between the first drive 10.1 and the first counterweight 11.1, the first support element 7.1 and the second support element 7.2 overlap in the position shown in Figure 1.1. Fig. 1. View shown.

[0039] Fig. Figure 2 shows a schematic view of a suspension of counterweights 11.1, 11.2 in front view in a position differing from the one shown in Fig. The embodiment shown in 1 differs slightly from the embodiment shown in 1, and is further selected as an example. As in the embodiment according to Fig. 1. The counterweights 11.1, 11.2 are guided one above the other in a first pair of guide rails 14 formed by the guide rails 14.1, 14.2, with the first counterweight 11.1 arranged above the second counterweight 11.2. Both the first counterweight 11.1 and the second counterweight 11.2 have deflection pulleys 12.1, 12.2, as shown in Fig. Figure 1 shows the first counterweight 11.1 in the 2:1 suspension. The deflection pulleys 12.1 and 12.2 are each offset from one another in a transverse direction Q, so that the support elements 7.1 and 7.2 run side by side. The following figures illustrate in more detail how the second support element 7.2 is guided past the first counterweight 11.1, or how the first counterweight 11.1 is designed to guide the second support element 7.2 past it.

[0040] The Fig. 3a, Fig. 3b and Fig. Figure 3c shows an embodiment of the counterweights 11.1, 11.2, largely corresponding to the Fig. 2, in detail. Fig. Figure 3a shows the two counterweights 11.1, 11.2, each cut out in front view. Fig. Figure 3c shows the two counterweights 11.1 and 11.2, each in a horizontal cross-section. The first counterweight 11.1 and the second counterweight 11.2 each extend within a space defined by Fig. The first counterweight 11.1 extends within the cross-section 13 shown in Figure 3c over a first width section B.1 and subsequently over a second width section B.2. In the first width section B.1, the first counterweight 11.1 is designed as a supporting structure with weight elements incorporated therein, in a manner not shown in detail. In the second width section B.2, the first counterweight 11.1 is designed solely as a supporting structure with two support frames 15.1, 15.2. The weight elements, not shown in detail, are therefore arranged exclusively in the first width section B.1, so that the center of gravity of the first counterweight 11.1 is also located there. In the second width section B.2, the support frames 15.1, 15.2 form a first recess 18.1 within which the second support element 7.2 is guided. The first counterweight 11.1 is therefore in the form of a rectangle with the first recess 18.1 for the second lifting element 7.2 trained.

[0041] Corresponding to the first counterweight 11.1, the second counterweight 11.2 extends within the envelope cross-section 13 over a third width range B.3 and subsequently within the envelope cross-section 13 over a fourth width range B.4, wherein in the Fig. In the embodiment shown in Figure 3c, the first width section B.1 has the same extent as the third width section B.3, and the second width section B.2 has the same extent as the fourth width section B.4. In the fourth width section B.4, the second counterweight 11.2, corresponding to the first counterweight 11.1, is designed solely as a support structure with two support frames 16.1, 16.2, wherein the support frames 16.1, 16.2 completely surround an internal rectangular second recess 18.2. Weight elements (not shown in detail) are then arranged exclusively in the third width section B.3, so that the center of gravity of the second counterweight 11.2 is also located there. In the fourth width section B.4, a first lower cable 17.1 is guided through the second recess 18.2 formed by the support frames 16.1, 16.2. The second counterweight 11.2 remains connected to a second lower rope 17.2, as shown in Fig. 3a shown.

[0042] Fig. Figure 3b shows a top view of a machine room 6 of an elevator system 100 according to the Fig. 3a and Fig. 3c and the first counterweight 11.1 in top view, showing in more detail the arrangement of the drives 10.1, 10.2.

[0043] The in the Fig. 4a, Fig. 4b and Fig. The embodiment of the elevator system 100 shown in 4c corresponds to the one described in the Fig. 3a, Fig. 3b and Fig. The embodiment shown in Figure 3c differs in a multitude of features not described repeatedly, but differs in that the support elements 7.1, 7.2 are each directly attached to the counterweights 11.1, 11.2 according to a 1:1 suspension. Furthermore, the support frames 15.1, 15.2, 16.1, 16.2 are each designed as individual structural struts, so that the first recess 18.1 and the second recess 18.2 are each openly located on the outside of the counterweights 11.1, 11.2, i.e., they are not surrounded by the support frames 15.1, 15.2, 16.1, 16.2.

[0044] The in the Fig. 5a, Fig. 5b and Fig. The embodiment of the elevator system 100 shown in 5c corresponds to the one described in the Fig. 3a, Fig. 3b and Fig. The embodiment shown in Figure 3c differs in a multitude of features not described repeatedly, but is distinguished in that the first lower rope 17.1 is attached to the first counterweight 11.1 via a deflection means. Furthermore, the first width range B.1 and the third width range B.3 each extend over three sections, with sections of the second width range B.2 and the fourth width range B.4 respectively arranged between these sections. The support frames 15.1, 16.1 and the recesses 18.1, 18.2 are formed or arranged within these sections. The deflection pulleys 12.1, 12.2 are arranged at an angle opposite to each other. The division between the sections of the width ranges B.1, B.2, B.3, B.4 and the support frames 15.1, 16.1 are shown in Fig. 5a not shown in detail.

[0045] The Fig. 6a, Fig. 6b and Fig. Figure 6c shows a further embodiment of the counterweights 11.1, 11.2 in the Fig. 3a to 5c corresponding representation. The first counterweight 11.1 and the second counterweight 11.2 each extend within the area shown in Fig. The first counterweight 11.1 extends within the cross-section 13 shown in Figure 3c over a first depth range T.1 and subsequently over a second depth range T.2. The depth ranges T.1 and T.2 thus extend in the depth direction T of the counterweights 11.1 and 11.2, which corresponds to the horizontal direction H of the elevator system 100. In the first depth range T.1, the first counterweight 11.1 is designed as a supporting structure with integrated weight elements (not shown in detail). In the second depth range T.2, the first counterweight 11.1 is designed solely as a supporting structure with a support frame 15.1. The weight elements (not shown in detail) are therefore located exclusively in the first depth range T.1, so that the center of gravity of the first counterweight 11.1 is also located there. In the second depth area T.2, the support frame 15.1 forms the first recess 18.1, within which the second support element 7.2 is led along.

[0046] Corresponding to the first counterweight 11.1, the second counterweight 11.2 extends within the hull cross-section 13 over a third depth region T.3 and subsequently within the hull cross-section 13 over a fourth depth region T.4, wherein in the Fig. In the embodiment shown in Figure 3c, the first depth section T.1 has the same extent as the third depth section T.3, and the second depth section T.2 has the same extent as the fourth depth section T.4. In the fourth depth section T.4, the second counterweight 11.2, corresponding to the first counterweight 11.1, is designed solely as a support structure with a support frame 16.1, the support frame 16.1 forming the second recess 18.2. Weight elements (not shown in detail) are then arranged exclusively in the third depth section T.3, so that the center of gravity of the second counterweight 11.2 is also located there. In the fourth depth section T.4, the first lower rope 17.1 is guided through the second recess 18.2 formed by the support frame 16.1.

[0047] In the Fig. 6a, Fig. 6b and Fig. In the embodiment shown in Figure 6c, the first depth range T.1 and the third depth range T.3 overlap at the counterweights 11.1, 11.2 arranged one above the other. Alternatively, embodiments are also possible in which these depth ranges T.1, T.3 extend side by side, for example directly adjacent to each other.

[0048] The Fig. 7a, Fig. 7b and Fig. 8a and Fig. Figure 8b shows two alternative embodiments of counterweights 11.1, 11.2, which are illustrated for further understanding and are not part of the present disclosure, wherein the support means 7.2 and the lower rope 17.1 are each guided outside the cross-section occupied by the counterweights 11.1, 11.2. In the embodiment of Fig. 7a and Fig. 7b the deflection pulleys 12.1, 12.2 are held outside the counterweights 11.1, 11.2 by cantilever arms, in the embodiment of the Fig. 8a and Fig.8b The deflection pulleys 12.1, 12.2 are arranged at an angle opposite to the counterweights 11.1, 11.2. The suspension element 7.2 and the lower rope 17.1 are each guided outside the counterweights 11.1, 11.2. Reference symbol list 1 elevator shaft 1.1 First side wall of the elevator shaft 1.2 second side wall of the elevator shaft 1.3 Rear wall of the elevator shaft 1.4 Shaft pit of the elevator shaft 1.5 Shaft head of the elevator shaft 2.1 First elevator car 2.2 second elevator car 3.1 Access door of the first elevator car 3.2 Access door of the second elevator car 4.1 Frame of the first elevator car 4.2 Frame of the second elevator car 5 second pair of guide rails 5.1 Guide rail of the second pair of guide rails 5.2 Guide rail of the second pair of guide rails 6 Engine room 7.1 first lifting device 7.2 second lifting device 8.1 First suspension of the first day's average 9.1 Deflection pulley of the first elevator car 9.2 Deflection pulley of the first elevator car 10.1 Drive of the first lifting element 10.2 Driving the second day average 11.1 first counterweight 11.2 second counterweight 12.1 First deflection pulley of the first counterweight 12.2 Second pulley of the second counterweight 13 Envelope cross-section 14 first pair of guide rails 14.1 Guide rail of the first pair of guide rails 14.2 Guide rail of the first pair of guide rails 15.1 Support frame of the first counterweight 15.2 Support frame of the first counterweight 16.1 Support frame of the second counterweight 16.2 Support frame of the second counterweight 17.1 first lower rope 17.2 second lower rope 18.1 first exception 18.2 second exception 100 elevator systems B.1 first latitude range B.2 second latitude range B.3 third latitude range B.4 fourth latitude H horizontal direction Q transverse direction T Depth direction T.1 first depth range T.2 second depth range T.3 third depth range T.4 fourth depth range V vertical direction QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 1 935 828 A1

[0004] JP S 59153773 A

[0004]

Claims

[1] Lifting system (100) for transporting persons and / or goods, comprising a vertically extending elevator shaft (1); a first elevator car (2.1) that can travel along the elevator shaft (1); a second elevator car (2.2) that can travel along the elevator shaft (1); a first counterweight (11.1) connected to the first car (2.1) via a first support element (7.1); and a second counterweight (11.2) connected to the second car (2.2) via a second lifting means (7.2); wherein the first counterweight (11.1) and the second counterweight (11.2) are guided one above the other in a first pair of guide rails (14) and each extend within a common envelope cross-section (13); wherein the first counterweight (11.1) is arranged above the second counterweight (11.2); wherein the first counterweight (11.1) accommodates weight elements in a first width region (B.1) or first depth region (T.1) of the envelope cross-section (13) and is designed as a pure load-bearing structure in a second width region (B.2) or second depth region (T.2) of the envelope cross-section (13) and has at least one first recess from the envelope cross-section (13); and wherein the second support element (7.2) is guided in the second width area (B.2) or second depth area (T.2) and within the first recess (18.1). [2] Lifting system (100) according to claim 1, wherein in the second width area (B.2) or second depth area (T.2) and within the first recess (18.1) two strands of the second support means (7.2) are guided. [3] Lifting system (100) according to claim 2, wherein the second support means (7.2) is guided on a deflection pulley (12.2) arranged on the second counterweight (11.2). [4] Lifting system (100) according to one of the preceding claims, wherein the second counterweight (11.2) extends in the second width area (B.2) or second depth area (T.2) covering the first recess (18.1). [5] Lifting system (100) according to one of the preceding claims, wherein the first counterweight (11.1) is further connected to the first car (2.1) via a first lower rope (17.1); wherein the second counterweight (11.2) accommodates weight elements in a third width region (B.3) or third depth region (T.3) of the envelope cross-section (13) and is designed as a pure load-bearing structure in a fourth width region (B.4) or fourth depth region (T.4) of the envelope cross-section (13) and has at least a second recess (18.2) from the envelope cross-section (13); and wherein in the fourth width range (B.4) or fourth depth range (T.4) and within the second recess (18.2) the first lower rope (17.1) is guided. [6] Lift system (100) according to claim 5, wherein in the fourth width area (B.4) or fourth depth area (T.4) and within the second recess (18.2) two strands of the first lower rope (17.1) are guided. [7] Lifting system (100) according to claim 5 or 6, wherein the first counterweight (11.1) extends over the second recess (18.2) in the fourth width area (B.4) or fourth depth area (T.4). [8] Lifting system (100) according to one of claims 5 to 7, wherein the third width range (B.3) corresponds to the second width range (B.2) and / or the fourth width range (B.4) corresponds to the first width range (B.1) or wherein the third depth range (T.3) corresponds to the second depth range (T.2) and / or the fourth depth range (T.4) corresponds to the first depth range (T.1). [9] Elevator system (100) according to one of claims 5 to 7, wherein the first width area (B.1) has the same extent as the third width area (B.3) and the second width area (B.2) has the same extent as the fourth width area (B.4) or wherein the first depth area (T.1) has the same extent as the third depth area (T.3) and the second depth area (T.2) has the same extent as the fourth depth area (T.4). [10] Elevator system (100) according to one of the preceding claims, wherein the first recess (18.1) is completely surrounded by the supporting structure of the first counterweight (11.1) in the second width region (B.2) or second depth region (T.2) and / or the second recess (18.2) is completely surrounded by the supporting structure of the second counterweight (11.2) in the fourth width region (B.4) or fourth depth region (T.4). [11] Lifting system (100) according to one of claims 1 to 9, wherein the first recess (18.1) and / or the second recess (18.2) are open to one side of the first counterweight (11.1) and / or the second counterweight (11.2), respectively. [12] Lifting system (100) according to one of the preceding claims, wherein the second counterweight (11.2) is connected to the second car (2.2) via a second lower rope (17.2). [13] Lifting system (100) according to one of the preceding claims, comprising at least one protective device to prevent contact between the first counterweight (11.1) and the second counterweight (11.2). [14] Lifting system (100) according to one of the preceding claims, wherein the first car (2.1) and the second car (2.2) are guided one above the other in a second pair of guide rails (5); and wherein the first car (2.1) is arranged below the second car (2.2).

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