Elevator system without machine room

Abstract

The invention discloses an elevator system without a machine room. The elevator system comprises a lift car, a counterweight, a driving device, a traction rope and a control device which are arranged in a lifting channel, the lift car is connected with the counterweight through a traction rope; under the control of the control device, the driving device drives the traction rope to drive the lift car to vertically move along the lifting channel in a traction mode, and meanwhile the counterweight vertically moves along the lifting channel and reversely moves relative to the lift car. The traction ratio of a car side traction rope of the elevator system without the machine room is M, the traction ratio of a counterweight side traction rope is N, and M is larger than or equal to 2 and smaller than N. The counterweight filler disclosed by the invention can be completely made of regenerated environment-friendly materials basically, so that the national green and low-carbon requirements are met, and the elevator cost is effectively reduced; the problem that protruding beams exist in the top space or the bottom pit of a building is effectively solved, and the civil engineering coping capacity of the elevator is further improved; the problems that the installation position of a driving device of an elevator without a machine room is close to a lifting channel top plate, hoisting is difficult, and maintenance and overhaul are not easy to approach are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to a machine room-less elevator system. Background Technology

[0002] Currently, in typical machine-room-less traction elevators, the traction ratio for passenger elevators is mostly 2:1, while the traction ratio for freight elevators is mostly 2:1, 4:1, or even higher. However, for a given elevator system, the traction ratios on the car side and the counterweight side are the same. For example, for an elevator with a traction ratio of 2:1, the traction rope ratio on the car side is 2:1, and the traction rope ratio on the counterweight side is also 2:1.

[0003] Current machine-room-less traction elevators, lacking a dedicated machine room, have their drive unit located within the lifting channel. Typically, the counterweight is positioned directly below the drive unit and its mounting base. This limits the available height for the counterweight frame compared to elevators with machine rooms, severely restricting the effective height for the counterweight blocks. Consequently, machine-room-less elevators require a high proportion of cast iron or steel plate counterweights, or even entirely steel plate counterweights. In some cases, if the available height for the counterweight frame is limited, or in heavy-duty elevators or panoramic elevators with large counterweights, even using entirely steel plate counterweights may not meet the balance coefficient requirements. This necessitates increasing the top floor height and pit depth, placing further demands on the building's civil engineering.

[0004] Under the condition that the traction ratios on the car side and the counterweight side are the same, the total vertical travel distance of the car and counterweight along the elevator shaft is also the same. If there are protruding beams in the building's top space or pit, which is actually a common problem in elevator civil engineering, then the car, counterweight, and protruding beams must be completely avoided in the vertical projection, thus reducing the civil engineering capacity to handle the elevator.

[0005] Furthermore, for machine-room-less elevators, the drive unit is typically located above the elevator shaft. To improve the competitiveness of the civil engineering, it is necessary to minimize the requirements for top floor height and pit depth. Given these limitations, to allow sufficient height for the counterweight frame, avoid issues with the balance coefficient configuration, and maximize the use of low-cost counterweight blocks, the drive unit and its mounting base need to be positioned as close as possible to the top of the elevator shaft. This results in several problems: hoisting the drive unit close to the top of the elevator shaft makes installation and maintenance difficult, and also inconvenient for routine maintenance. Summary of the Invention

[0006] The technical problem to be solved by this invention is how to provide a technical solution for a machine room-less elevator system that can be equipped with more counterweights made of environmentally friendly and energy-saving materials to improve the civil engineering capacity of the elevator; it can also further solve the problems of difficult hoisting of the drive device and inaccessibility for maintenance and repair that are common in machine room-less elevator systems.

[0007] To solve the above-mentioned technical problems, the present invention provides a machine room-less elevator system, including a car, a counterweight, a drive unit, a traction rope, and a control unit installed in the lifting channel; the car and the counterweight are connected by the traction rope; under the control of the control unit, the drive unit drives the traction rope to move the car vertically along the lifting channel by traction, while the counterweight moves vertically along the lifting channel and in the opposite direction to the car; the traction ratio of the traction rope on the car side of the machine room-less elevator system is M, and the traction ratio of the traction rope on the counterweight side is N, where 2≤M<N.

[0008] Preferably, the car moves vertically along the lifting channel, and the total travel of the car is greater than the total travel of the counterweight.

[0009] Preferably, at least a portion of the counterweights have a density of less than 5 g / cm³.

[0010] Preferably, the vertical projection of the counterweight within the lifting channel overlaps with the protruding beam portion within the lifting channel.

[0011] Preferably, the counterweight's travel within the lifting channel is located above the protruding beam.

[0012] Preferably, the counterweight's travel within the lifting channel is located at the lower part of the protruding beam.

[0013] Preferably, the machine room-less elevator system further includes a top hook; the top hook is located at the top of the lifting channel, above the drive unit.

[0014] Preferably, the vertical distance between the bottom of the top hook and the drive device is not less than 0.8 meters.

[0015] Compared with the prior art, the present invention achieves the following technical effects:

[0016] 1. Significantly increase the application of environmentally friendly and energy-saving materials in elevators; the main structural components can be made entirely of recycled and environmentally friendly materials. This not only meets national green and low-carbon requirements but also effectively reduces elevator costs.

[0017] 2. Effectively address the issue of protruding beams in the building's top space or pit, further improving the elevator's civil engineering capabilities.

[0018] 3. It effectively solves the common problem of machine-room-less elevators where the drive unit is installed close to the top of the elevator shaft, making hoisting difficult and maintenance and repair inaccessible. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] Figure 1 , Figure 2 This is a schematic diagram of an existing machine room-less elevator system.

[0021] Figure 3 , Figure 4 This is a schematic diagram of a machine-room-less elevator system according to Embodiment 1 of the present invention;

[0022] Figure 5 This is a schematic diagram of a machine-room-less elevator system according to Embodiment 2 of the present invention;

[0023] Figure 6 , Figure 7 This is a schematic diagram of a machine-room-less elevator system according to Embodiment 3 of the present invention;

[0024] Figure 8 This is a schematic diagram of a machine-room-less elevator system according to Embodiment 4 of the present invention;

[0025] Figure 9 This is a schematic diagram of a machine-room-less elevator system according to Embodiment 5 of the present invention;

[0026] Figure 10 This is a schematic diagram of a machine-room-less elevator system according to Embodiment 6 of the present invention;

[0027] Figure 11 This is a schematic diagram of the machine-room-less elevator system according to Embodiment 7 of the present invention;

[0028] Figure 12 This is a schematic diagram of the machine-room-less elevator system of Embodiment 8 of the present invention.

[0029] The annotations in the attached figures are explained as follows:

[0030] 11 is the lifting channel; 12 is the top hook; 13 is the protruding beam;

[0031] 21 is the car; 22 is the car side counterweight sheave; 23 is the counterweight; 24 is the counterweight side counterweight sheave; 25 is the hoisting channel counterweight sheave; 26 is the counterweight safety brake;

[0032] 31 is the drive unit; 32 is the drive wheel; 33 is the control unit; 34 is the drive unit base;

[0033] 41 is the traction rope; 42 is the rope end on the car side; 43 is the rope end on the counterweight side; 44 is the compensating rope;

[0034] 51 is the car-side buffer; 52 is the counterweight-side buffer. Detailed Implementation

[0035] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art.

[0036] like Figure 1 , Figure 2 The diagram shown is a schematic of a prior art machine-room-less elevator system. In this system, the car 21 and counterweight 23 are arranged in the elevator shaft 11, guided by car guide rails and counterweight guide rails (not shown in the diagram), respectively. They are suspended by traction ropes 41 wound on the drive wheel 32 of the drive unit 31, and move vertically in opposite directions within the elevator shaft 11 by the driving force of the drive unit 31 located at the top of the elevator shaft 11. The drive unit 31 is mounted on a drive unit seat 34, which is generally supported by the car guide rails and / or the counterweight guide rails (not shown in the diagram). Compensating cables 44 are suspended below the car 21 and counterweight 23 to compensate for the weight difference caused by changes in the length of the traction ropes 41 on the car side and the counterweight side during elevator operation.

[0037] Figure 1 , Figure 2 The diagram shows a machine-room-less elevator with a traction ratio of 2:1, which is currently the most common type. The traction rope ratios on both the car and counterweight sides are 2. A car-side pulley 22 (shown as a bottom pulley) is installed on the car 21, and a counterweight-side pulley 24 is installed on the counterweight 23. The traction rope 41 passes over the car-side pulley 22 and the counterweight-side pulley 24, with both ends fixed to the top of the elevator shaft 11, distinguished by their positions as car-side rope end 42 and counterweight-side rope end 43. Generally, the counterweight-side rope end 43 is also installed on the drive unit seat 34. The elevator's operation is controlled by the control device 33, which is typically located at the top of the elevator shaft 11 or at the top floor. In the pit, a car-side buffer 51 and a counterweight-side buffer 52 are installed corresponding to the car 21 and counterweight 23, respectively, to provide buffering and protection.

[0038] Figure 1 The diagram shows the situation where car 21 is at the top floor and counterweight 23 is at the bottom floor. Figure 2The diagram shows the situation where the car 21 is at the bottom floor and the counterweight 23 is at the top floor. It is easy to see that since the traction ratios on the car side and the counterweight side are the same, both being 2, the total vertical travel distance of the car 21 and the counterweight 23 along the lifting channel 11 is also the same, i.e., the lifting height TR shown in the figure.

[0039] Obviously, the allowable height of the counterweight frame at this point will not be significantly greater than the car height. After deducting the height of the counterweight sheave, the height of the upper and lower counterweight frames, and the height of the lower adjusting blocks, the effective height left in the counterweight frame for placing the counterweight blocks is limited. For machine-room-less elevators, since there is no dedicated machine room, the drive unit 31 is located within the lifting channel 11. Under normal circumstances, the counterweight 23 is located directly below the drive unit 31 and the drive unit mounting base 34. The height that can be reserved for the counterweight 23 frame is further limited compared to elevators with machine rooms, meaning the effective height reserved for placing the counterweight blocks is severely restricted. Considering the civil engineering capacity, the planar dimensions of the counterweight are also limited. To achieve the designed counterweight weight W2, a higher density of counterweight blocks is required. In practice, a higher proportion of metal counterweight blocks is needed, resulting in high elevator costs.

[0040] As a result, machine-room-less elevators require a high proportion of cast iron and steel plate counterweights, or even all steel plate counterweights. In some cases, if the height reserved for the counterweight frame is limited, or if the counterweight weight W2 value is large for heavy-duty elevators or sightseeing elevators, even using all steel plate counterweights may not meet the balance coefficient requirements, necessitating an increase in the top floor height and pit depth, which places further demands on the building's civil engineering.

[0041] like Figure 2 As shown, for machine-room-less elevators, the drive unit 31 is generally located above the lifting channel 11. To improve the competitiveness of civil engineering, it is necessary to minimize the requirements for top floor height and pit depth. Given the limitations on top floor height and pit depth, to allow sufficient height for the counterweight 23 frame, avoid issues with the balance coefficient configuration, and utilize low-cost counterweight blocks, the drive unit 31 and its mounting base 34 need to be as close as possible to the top plate of the lifting channel 11. The problem is that the drive unit 31 being so close to the top plate of the lifting channel 11 makes installation and maintenance difficult, and maintenance operations inconvenient. Currently available machine-room-less elevators have a vertical distance A between the top hook 12 and the drive unit 31, which is only 100-200mm in extreme cases, making hoisting with a hand-operated hoist very difficult, or requiring the design and fabrication of special tooling. The excessively high installation position of the drive unit 31 also makes it difficult to access during routine maintenance and repair. Even when maintenance personnel stand on top of the car 21 and reach the highest position, they may still not be able to easily approach the drive unit 31 and complete the operation.

[0042] Example 1

[0043] like Figure 3 , Figure 4 The diagram shown is a schematic of Embodiment 1 of the present invention. This embodiment provides a machine room-less elevator system, including a car 21, a counterweight 23, a drive unit 31, a traction rope 41, and a control unit 33 disposed in the elevator shaft 11; the car 21 and the counterweight 23 are connected by the traction rope 41; under the control of the control unit 33, the drive unit 31 drives the traction rope 41 to move the car 21 vertically along the elevator shaft 11 by traction, while the counterweight 23 moves vertically along the elevator shaft 11 and in the opposite direction to the car 21.

[0044] The traction ratio of the car-side traction rope is M = 2, and the traction ratio of the counterweight-side traction rope is N = 4; at the top of the lifting channel 11, a lifting channel anti-rope pulley 25 is installed on the counterweight side. That is, the traction ratio of the car-side and counterweight-side traction ropes satisfies 2 ≤ M < N.

[0045] Figure 3 The diagram shows the situation where car 21 is at the top floor and counterweight 23 is at the bottom floor. For ease of discussion, it is assumed that when counterweight 23 is at the bottom floor, its position is close to that of car 21 at the bottom floor. Figure 4 The diagram shows the situation where car 21 is at the bottom floor and counterweight 23 is at the top floor. Since the car-side traction ratio M = 2 and the counterweight-side traction ratio N = 4, when the total travel distance of car 21 from the top floor to the bottom floor is the lifting height TR shown in the diagram, the total travel distance of counterweight 23 is TR / 2.

[0046] Example 2

[0047] like Figure 5 The diagram shown is a schematic of Embodiment 2 of the present invention. Similar to Embodiment 1, in this embodiment, the traction ratio of the car-side traction rope is M=2, and the traction ratio of the counterweight-side traction rope is N=4. Since the total stroke of the counterweight 23 is TR / 2, which is half of the total stroke of the car 21, it indicates that in the vertical direction of the lifting channel 11, the counterweight 23 still has a "space margin" of TR / 2 height.

[0048] In this embodiment, compared to Embodiment 1, the frame of the counterweight 23 is lengthened, and the shaded area in the counterweight 23 represents the lengthened frame space. The lengthened counterweight frame allows for a larger space to place the counterweight blocks, thus reducing the density requirement for the counterweight blocks. The advantage is that, whereas conventionally a large number of metal counterweight blocks are required, in this embodiment, lower-density recycled and environmentally friendly materials can be used instead. This allows at least a portion of the counterweight blocks to have a density of less than 5 g / cm³, for example, around 4 g / cm³.

[0049] Generally, counterweights made of different materials have the following relationship:

[0050] ①Density:

[0051] Recycled and environmentally friendly materials: Cast iron: Steel plate = 4:7:8;

[0052] ② Cost:

[0053] Recycled and environmentally friendly materials: cast iron: steel plate = 1:4:8.

[0054] For a typical machine-room-less passenger elevator, the counterweight 23 weighs between 1500 and 2500 kg. Clearly, increasing the proportion of recycled and environmentally friendly materials used in the counterweight can effectively reduce counterweight costs, thereby lowering the overall elevator cost. Furthermore, significantly increasing the application of environmentally friendly and energy-saving materials in elevators also aligns with the national requirements for green and low-carbon development.

[0055] In this embodiment, based on the preceding analysis, counterweight 23 still has a "space margin" of TR / 2 height. Therefore, the increased height of the counterweight frame shown in the shaded area accounts for a very limited proportion compared to the lifting channel space of TR / 2 height. Thus, we can confidently increase the height of counterweight 23 based on the system calculations, thereby configuring all counterweight blocks made of recycled and environmentally friendly materials, achieving the ultimate cost-effectiveness of counterweight 23.

[0056] Because there is ample "space margin," the counterweight frame can be extended as needed. Therefore, even for machine-room-less elevators, such as heavy-duty elevators and sightseeing elevators with large counterweights, there will be no situation where even with all steel plate counterweights, the balance coefficient requirements cannot be met. There is no need to increase the top floor height or pit depth of the elevator shaft 11, improving the adaptability of the building's civil engineering.

[0057] Example 3

[0058] like Figure 6 , Figure 7 The diagram shown is a schematic of Embodiment 3 of the present invention. In this embodiment, the traction ratio of the car-side traction rope is M=2, and the traction ratio of the counterweight-side traction rope is N=3; a counterweight-side anti-rope pulley 25 is provided at the top of the lifting channel 11. When the total travel of the car 21 from the top floor to the bottom floor is the lifting height TR shown in the figure, the total travel of the counterweight 23 is 2*TR / 3, which is 2 / 3 of the total travel of the car 21. This indicates that in the vertical direction of the lifting channel 11, the counterweight 23 has a "space margin" of TR / 3 height.

[0059] like Figure 7 As shown in Example 2, the frame of counterweight 23 can also be lengthened in this example. The shaded area in counterweight 23 represents the lengthened frame space. This increases the proportion of recycled and environmentally friendly materials in the weight blocks, effectively reducing the overall cost of the elevator and meeting the requirements of national green and low-carbon development.

[0060] Example 4

[0061] like Figure 8 The diagram shown is a schematic representation of Embodiment 4 of the present invention. In this embodiment, the traction ratio of the car-side traction rope is M = 2, and the traction ratio of the counterweight-side traction rope is N = 3.

[0062] For machine-room-less elevators, a minimum height is required for the counterweight 23 to ensure the counterweight weight meets the system's calculated requirements. However, the height of the counterweight 23 is constrained by building civil engineering requirements and must also consider the height of the drive unit 31 and drive unit seat 34 at the top of the lifting channel 11. Therefore, the frame height of the counterweight 23 cannot be arbitrarily increased. According to elevator standards, a safety clamp should be installed on the counterweight when there is accessible space below the lifting channel 11. In this case, a counterweight safety clamp 26 is added below the counterweight 23, with a height generally ranging from 300 to 1000 mm. Increasing the counterweight height requirement translates into requirements for civil engineering dimensions, typically increasing the pit depth PD, affecting the elevator's civil engineering compliance and reducing product competitiveness.

[0063] In this embodiment, based on the preceding analysis, the counterweight 23 still has a "space margin" of TR / 3 height. Therefore, the counterweight 23 can not only reduce costs by lengthening the frame, as shown in the shaded area, and increasing the proportion of recycled and environmentally friendly counterweight blocks; it can also improve the civil engineering capacity of the elevator by adding the counterweight safety clamp 26 without increasing the requirements for civil engineering dimensions.

[0064] Example 5

[0065] like Figure 9 The diagram shown is a schematic of Embodiment 5 of the present invention. In this embodiment, the traction ratio of the car-side traction rope is M=2, and the traction ratio of the counterweight-side traction rope is N=3, so the counterweight 23 still has a "space margin" of TR / 3 height.

[0066] In this embodiment, a protruding beam 13 exists within the pit, a common issue in elevator construction. For ordinary traction elevators, the car 21, counterweight 23, and protruding beam 13 must be completely avoided in the vertical projection, effectively reducing the elevator shaft's planar space and thus lowering the elevator's civil engineering capabilities. In this embodiment, because the counterweight 23 has a "space margin" of TR / 3 height in the vertical direction of the lifting channel 11, the lowest operating position of the counterweight 23 can be raised, correspondingly increasing the installation height of the counterweight-side buffer 52, ensuring that the protruding beam 13 does not interfere with the operation of the counterweight 23. Therefore, the upper space of the pit protruding beam 13 is effectively utilized, improving the elevator's civil engineering capabilities.

[0067] Example 6

[0068] like Figure 10The diagram shown is a schematic of Embodiment 6 of the present invention. In this embodiment, the traction ratio of the car-side traction rope is M=2, and the traction ratio of the counterweight-side traction rope is N=3, so the counterweight 23 still has a "space margin" of TR / 3 height.

[0069] In this embodiment, a protruding beam 13 exists near the top floor of the elevator shaft 11, a common problem in elevator construction. For machine-room-less traction elevators, the car 21, counterweight 23, and protruding beam 13 must be completely avoided in the vertical projection, effectively reducing the elevator shaft's planar space and thus lowering the elevator's civil engineering capabilities. In this embodiment, since the counterweight 23 has a "space margin" of TR / 3 height in the vertical direction of the elevator shaft 11, its highest operating position can be lowered below the height of the protruding beam 13. Only the traction rope 41 needs to be careful to avoid the protruding beam 13, ensuring that the protruding beam 13 does not interfere with the operation of the counterweight 23. Therefore, the space below the top-floor protruding beam 13 is effectively utilized, improving the elevator's civil engineering capabilities.

[0070] Example 7

[0071] like Figure 11 The diagram shown is a schematic of Embodiment 7 of the present invention. In this embodiment, the traction ratio of the car-side traction rope is M=2, and the traction ratio of the counterweight-side traction rope is N=3, so the counterweight 23 still has a "space margin" of TR / 3 height.

[0072] For example Figure 2 As shown, a current problem with conventional machine-room-less elevators is that the drive unit 31 and its mounting base 34 are positioned as close as possible to the top of the elevator shaft 11. This makes installation and maintenance difficult, and maintenance operations inconvenient. In this embodiment, since the counterweight 23 has a "space margin" of TR / 3 height in the vertical direction of the elevator shaft 11, its highest operating position can be lowered. In conventional machine-room-less elevators, the drive unit 31 and its mounting base 34 do not interfere with the car 21 in the vertical projection; therefore, the position of the drive unit 31 and its mounting base 34 in the vertical direction of the elevator shaft 11 can also be lowered.

[0073] After the drive unit 31 and drive unit mounting base 34 are lowered, the vertical distance B between the top hook 12 set at the top of the lifting channel and the drive unit 31 can be set to a range that is convenient for hoisting with a hand chain hoist, such as not less than 0.8 meters or about 1 meter. After the drive unit 31 and drive unit mounting base 34 are lowered, maintenance personnel can stand on the top of the car 21 and face the drive unit 31, making it convenient to approach the drive unit 31 and complete the operation.

[0074] Example 8

[0075] like Figure 12 The diagram shown is a schematic diagram of Embodiment 8 of the present invention. In this embodiment, the traction ratio of the car-side traction rope is M=2, and the traction ratio of the counterweight-side traction rope is N=3, so the counterweight 23 still has a "space margin" of TR / 3 height.

[0076] Similar to Embodiment 7, the position of the drive unit 31 and drive unit mounting base 34 in the vertical direction of the lifting channel 11 can also be lowered, solving the problems of difficult hoisting and inaccessible maintenance and repair of the drive unit 31. Because the counterweight 23 has sufficient "space margin" for operation, similar to Embodiment 3, the frame of the counterweight 23 can also be lengthened in this embodiment; the shaded area in the counterweight 23 shows the lengthened frame space. This increases the proportion of recycled and environmentally friendly materials in the weight blocks, effectively reducing the overall elevator cost and meeting the national requirements for green and low-carbon development.

[0077] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A machine-room-less elevator system, comprising a car, a counterweight, a drive unit, a traction rope, and a control unit disposed within a lifting channel; the car and the counterweight are connected by the traction rope; under the control of the control unit, the drive unit drives the traction rope to move the car vertically along the lifting channel by traction, while the counterweight moves vertically along the lifting channel and in the opposite direction to the car. Its features are: The traction ratio of the car-side traction rope in the machine-room-less elevator system is M, and the traction ratio of the counterweight-side traction rope is N, where 2 ≤ M < N.

2. The machine-room-less elevator system according to claim 1, characterized in that, The car moves vertically along the lifting channel, and the total travel of the car is greater than the total travel of the counterweight.

3. The machine-room-less elevator system according to claim 2, characterized in that, At least a portion of the counterweight blocks have a density of less than 5 g / cm³.

4. The machine-room-less elevator system according to claim 1, characterized in that, The vertical projection of the counterweight within the lifting channel overlaps with the protruding beam portion within the lifting channel.

5. The machine-room-less elevator system according to claim 4, characterized in that, The counterweight travels within the lifting channel at the top of the protruding beam.

6. The machine-room-less elevator system according to claim 4, characterized in that, The counterweight's travel within the lifting channel is located at the lower part of the protruding beam.

7. The machine-room-less elevator system according to claim 1, characterized in that, The machine-room-less elevator system also includes a top hook; the top hook is located at the top of the lifting channel, above the drive unit.

8. The machine-room-less elevator system according to claim 7, characterized in that, The vertical distance between the bottom of the top hook and the drive device is not less than 0.8 meters.

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