Platform ladder

Abstract

The platform elevator claimed in the present application comprises a car, a shaft top frame, a counterweight assembly and a traction system; the car comprises a car roof upper beam, a car counter-pulley is installed on the car roof upper beam, and a bearing center point of the car counter-pulley is arranged on a center line of the car; a guide wheel set is installed on the shaft top frame; a counterweight counter-pulley is installed on the counterweight assembly; the traction system comprises a traction rope, a traction wheel and a traction machine, one end of the traction rope is connected to the counterweight counter-pulley via the traction wheel, the other end of the traction rope is connected to the car counter-pulley via the traction wheel and the guide wheel set, and the traction wheel is drivingly connected to the traction machine for providing power to the traction rope to control the lifting of the car. In this way, not only the unilateral wear of the guide shoe and the car guide rail during the lifting of the car can be reduced to prolong the service life, but also the abnormal vibration and noise during the operation of the car can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of elevator-related technology, and in particular relates to a platform elevator. Background Technology

[0002] Currently, most platform elevators on the market adopt a backpack-style suspension structure. This design places the suspension point of the car on a straight beam on one side of the car's side wall, using a 1:1 traction rope for direct traction. During heavy-duty operation, because the suspension point is off-center from the car's center of gravity, the entire weight of the car is transferred to the guide shoes through this single suspension point. This forces the guide shoes to bear both vertical loads and resist lateral bending moments, creating a complex combined stress state. Over long-term operation, this not only accelerates the wear of the guide shoes and guide rails but also causes abnormal vibrations and noise in the car, severely affecting the platform elevator's operational stability and passenger comfort, and potentially shortening the equipment's lifespan. Utility Model Content

[0003] In view of this, it is necessary to provide a platform ladder for solving the problem of uneven loading of the car.

[0004] A platform ladder, comprising:

[0005] The car includes a car top beam, on which a car anti-rope sheave is installed, and the load-bearing center point of the car anti-rope sheave is located on the center line of the car.

[0006] A top frame for the elevator shaft is installed in the elevator shaft and located above the car. A set of guide wheels is installed on the top frame for the elevator shaft.

[0007] A counterweight assembly is located on the rear side of the car, and a counterweight reversing pulley is installed on the counterweight assembly;

[0008] The traction system includes a traction rope, a traction sheave, and a traction machine. One end of the traction rope is connected to the counterweight counterweight sheave after passing through the traction sheave and the other end of the traction rope is connected to the car counterweight sheave after passing through the traction sheave and the guide sheave assembly. The traction sheave is driven and connected to the traction machine to provide power to the traction rope in order to control the lifting and lowering of the car.

[0009] Understandably, setting the suspension point of the traction rope to the car at the top beam of the car and ensuring that the suspension point is located on the center line of the car allows the traction force of the platform elevator to be directly transmitted through the center of gravity of the car, and makes the car bear the force evenly. This not only reduces the unilateral wear of the guide shoes and car guide rails during the car's lifting and lowering process, extending their service life, but also reduces abnormal vibration and noise during the car's operation, thereby improving the stability of the platform elevator's operation and the comfort of the passengers.

[0010] In one embodiment, the platform ladder further includes a car suspension end-connection device, which is installed above the car;

[0011] The number of the car anti-cord sheaves is configured to be one, and the car anti-cord sheaves are set on the center line of the car; and the guide wheel group includes a first guide wheel and a second guide wheel, the traction rope passes through the first guide wheel and the second guide wheel in sequence, extends vertically downward, passes through the car anti-cord sheaves, extends vertically upward, and is connected to the car suspension end connection device;

[0012] Alternatively, the number of the car anti-cord pulleys is configured to be an even number, and the even number of car anti-cord pulleys are symmetrically arranged with respect to the center line of the car; and the guide wheel group includes a first guide wheel and a second guide wheel, the traction rope passes through the first guide wheel and the second guide wheel in sequence, extends vertically downward, passes through the even number of car anti-cord pulleys in sequence, extends vertically upward, and is connected to the car suspension end connection device.

[0013] In one embodiment, the car suspension end-connection device is arranged horizontally;

[0014] A deflector pulley is also installed on the top frame of the shaft. The position of the deflector pulley is higher than that of the second guide pulley. The traction rope, after passing through the deflector pulley, is connected to the car suspension end device.

[0015] It is understandable that using a horizontally arranged car suspension end-connecting device to fix the other end of the traction rope can reduce the space required for the installation of the car suspension end-connecting device at the top floor of the shaft, so that the platform ladder can be used in application scenarios with low top floor space.

[0016] In one embodiment, the car suspension termination device is arranged vertically and is perpendicular to the top frame of the hoistway, and the traction rope after passing through the car deflector is connected to the car suspension termination device.

[0017] It is understandable that using a vertically arranged car suspension end-connecting device to fix the other end of the traction rope allows the traction rope to be directly connected to the car suspension end-connecting device after passing through the car deflector. This simplifies the structure required to fix the other end of the traction rope and reduces costs.

[0018] In one embodiment, the platform ladder further includes a first shaft decorative panel, which is disposed between the counterweight assembly and the car to cover the counterweight assembly.

[0019] Understandably, using the first shaft decorative panel to conceal the counterweight components allows the area where the counterweight components are located to be hidden, thus enhancing the aesthetics of the platform ladder.

[0020] In one embodiment, the platform ladder further includes a counterweight guide rail, and the counterweight assembly is slidably connected to the counterweight guide rail;

[0021] A platform frame is mounted on the counterweight guide rail. The platform frame is vertically positioned above the first shaft decorative panel and connected to the first shaft decorative panel. The traction machine is fixedly mounted on the platform frame.

[0022] It is understandable that by installing the traction machine onto the platform frame of the counterweight guide rail, the platform ladder can use the counterweight guide rail to support the traction machine and achieve a machine room-less structural design, thus making the platform ladder suitable for application scenarios with low-ceilinged spaces.

[0023] In one embodiment, the platform ladder further includes a counterweight suspension end device, which is arranged vertically and forms a perpendicular relationship with the platform frame; and the traction rope after passing through the counterweight anti-reverse rope sheave is connected to the counterweight suspension end device.

[0024] In one embodiment, the platform elevator further includes a second shaft decorative panel, which is disposed between the car and the shaft top frame to cover the shaft top frame.

[0025] Understandably, using a second shaft decorative panel to cover the top frame of the shaft can hide the area where the top frame is located, thus enhancing the appearance of the platform staircase.

[0026] In one embodiment, the guide wheel assembly includes a first guide wheel and a second guide wheel (212), the first guide wheel being disposed below the second guide wheel, and the traction rope being disposed to pass through the traction wheel and then sequentially wrap around the first guide wheel and the second guide wheel.

[0027] In one embodiment, the platform elevator further includes a car guide rail, to which the car is slidably connected;

[0028] The car guide rail is located on the rear side of the car.

[0029] It is understandable that the car guide rail is arranged on the rear side of the car, so that the car guide rail is located in the area where the counterweight components are located. This way, the installation of the car guide rail does not need to occupy the hoistway space separately, thereby improving the utilization rate of the hoistway space.

[0030] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0031] The platform ladder for which this application seeks protection sets the suspension point of the traction rope to the car at the position of the upper beam on the top of the car, and ensures that the suspension point is set on the center line of the car. This allows the traction force of the platform ladder to be directly transmitted through the center of gravity of the car and the force on the car to be evenly distributed. This not only reduces the unilateral wear of the guide shoes and car guide rails during the car's lifting and lowering process and extends their service life, but also reduces abnormal vibration and noise during the car's operation, thereby improving the stability of the platform ladder's operation and the comfort of the passengers. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the platform ladder provided in the first embodiment of this application.

[0034] Figure 2 This is a top view of the platform ladder provided in the first embodiment of this application.

[0035] Figure 3 This is a schematic diagram of the platform ladder provided in the second embodiment of this application.

[0036] Figure 4 This is a schematic diagram of the platform ladder provided in the third embodiment of this application.

[0037] Figure 5 This is a top view of the platform ladder provided in the third embodiment of this application.

[0038] Figure 6 This is a schematic diagram of the platform ladder provided in the fourth embodiment of this application.

[0039] Reference numerals: 100, Platform ladder; 10, Car; 11, Car top beam; 12, Car deflector sheave; 20, Hoistway top frame; 21, Guide wheel assembly; 211, First guide wheel; 212, Second guide wheel; 22, Deflector sheave; 30, Car suspension end device; 40, Counterweight assembly; 41, Counterweight deflector sheave; 50, Counterweight suspension end device; 60, Traction system; 61, Traction rope; 62, Traction sheave; 70, Counterweight guide rail; 71, Platform frame; 80, Car guide rail; 91, First hoistway decorative panel; 92, Second hoistway decorative panel. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] The platform elevator 100 that this application seeks to protect specifically refers to a home elevator used in high-end villas, city exhibition halls, etc.

[0044] like Figures 1 to 6 As shown, the platform elevator 100 provided in this application includes a car 10, a shaft top frame 20, a counterweight assembly 40, and a traction system 60; the car 10 includes a car top beam 11, on which a car deflector sheave 12 is installed, and the load-bearing center point of the car deflector sheave 12 is located on the centerline of the car 10; the shaft top frame 20 is located in the elevator shaft and above the car 10, and a guide wheel assembly 21 is installed on the shaft top frame 20; the counterweight assembly 40... Located on the rear side of the car 10, a counterweight sheave 41 is mounted on the counterweight assembly 40. The traction system 60 includes a traction rope 61, a traction sheave 62, and a traction machine (not shown). One end of the traction rope 61 is connected to the counterweight sheave 41 after passing through the traction sheave 62. The other end of the traction rope 61 is connected to the car sheave 12 after passing through the traction sheave 62 and the guide wheel assembly 21. The traction sheave 62 is connected to the traction machine to provide power to the traction rope 61 to control the lifting and lowering of the car 10. It should be noted that the bearing center point of the aforementioned car sheave 12 specifically refers to the center point of the resultant force on the car 10 when the car sheave 12 bears the car 10.

[0045] As can be seen from the above, the platform ladder 100 of this application sets the suspension point of the traction rope 61 to the car 10 at the position of the car top beam 11 of the car 10, and ensures that the suspension point is set on the center line of the car 10, so that the traction force of the platform ladder 100 is directly transmitted through the center of gravity of the car 10 and the car 10 is evenly stressed. This not only reduces the unilateral wear of the guide shoes (not shown) and the car guide rail 80 during the lifting and lowering of the car 10 and extends its service life, but also reduces abnormal vibration and noise during the operation of the car 10, thereby improving the smoothness of the platform ladder 100 and the comfort of the passengers.

[0046] It should be noted that the platform ladder 100 of this application also includes a car suspension end device 30 and a counterweight suspension end device 50. The car suspension end device 30 is installed above the car 10, and the counterweight suspension end device 50 is vertically positioned above the counterweight assembly 40. The traction rope 61 is connected to the car suspension end device 30 at one end, which passes around the car counter-rotating sheave 12, and to the counterweight suspension end device 50 at the other end, which passes around the counterweight counter-rotating sheave 41. This allows the traction sheave 62 to drive the car 10 to descend or ascend via the traction rope 61. During this process, the counterweight assembly 40 can balance the load of the car 10. The specific structures of the car suspension end device 30 and the counterweight suspension end device 50, and how they are connected and fixed to the traction rope 61, can all adopt conventional methods of existing platform ladders, and will not be elaborated upon here.

[0047] like Figure 2 , Figure 5 As shown, in this application, the platform ladder 100 also includes a counterweight guide rail 70, on which the counterweight assembly 40 is slidably connected to guide the lifting and lowering movement of the counterweight assembly 40. A platform frame 71 is mounted on the counterweight guide rail 70, and the traction machine is fixedly mounted on the platform frame 71. In other words, the platform ladder 100 of this application utilizes the counterweight guide rail 70 and the platform frame 71 to support the traction machine, thereby achieving a machine room-less structure for the platform ladder 100. This makes the platform ladder 100 suitable for applications in low-ceilinged spaces. Here, the platform frame 71 is installed at the top of the counterweight guide rail 70, and the counterweight suspension end-connection device 50 can be specifically installed on the platform frame 71 and / or the traction machine.

[0048] like Figure 2 , Figure 5As shown in this application, the platform elevator 100 also includes a car guide rail 80, on which the car 10 is slidably connected, thereby guiding the car 10 during its lifting and lowering movements. Furthermore, the car guide rail 80 is located on the rear side of the car 10. In other words, the car guide rail 80 of the platform elevator 100 of this application is located within the area where the counterweight assembly 40 is situated. This eliminates the need for the car guide rail 80 to occupy separate shaft space, thus improving the utilization rate of shaft space.

[0049] like Figures 1 to 6 As shown, in this application, the platform elevator 100 also includes a first shaft decorative panel 91. The first shaft decorative panel 91 is located between the counterweight assembly 40 and the car 10, and is used to conceal the counterweight assembly 40. Specifically, it can hide the components in the area where the counterweight assembly 40 is located, thereby enhancing the appearance of the platform elevator 100. Here, the first shaft decorative panel 91 can cover the entire lifting trajectory of the car 10, ensuring that passengers inside the car 10 cannot see the elevator components in the area where the counterweight assembly 40 is located. The platform frame 71 installed on the counterweight guide rail 70 of this application is vertically positioned above the first shaft decorative panel 91 and connected to it, so that the platform frame 71 can provide a fixed support point for the first shaft decorative panel 91. It should be noted that the car 10 of this application is made of transparent glass material, making it suitable for use in high-end villa elevators, urban exhibition halls, and other application scenarios.

[0050] like Figure 1 , Figure 3 and Figure 6 As shown in the diagram, in this application, the platform elevator 100 also includes a second shaft decorative panel 92. The second shaft decorative panel 92 is positioned between the car 10 and the shaft top frame 20. Specifically, the second shaft decorative panel 92 can be installed on the side of the shaft top frame 20 facing the car 10 to conceal the elevator components. Here, the second shaft decorative panel 92 can cover the entire shaft top frame 20, ensuring that passengers inside the car 10 cannot see the elevator components within the area of ​​the shaft top frame 20. It should be noted that the platform elevator 100 of this application also includes a first shaft decorative panel 91 and a second shaft decorative panel 92.

[0051] like Figure 1 , Figure 2 As shown, in the platform ladder 100 provided in the first embodiment of this application, the number of car anti-rope pulleys 12 is configured to be one, specifically, the car anti-rope pulley 12 can be set on the center line of the car 10.

[0052] like Figure 1 , Figure 2As shown, in this first embodiment, the guide wheel assembly 21 includes a first guide wheel 211 and a second guide wheel 212. The traction rope 61 is arranged to pass through the first guide wheel 211 and the second guide wheel 212 in sequence, extends vertically downward, passes through the car anti-rope wheel 12, extends vertically upward, and connects to the car suspension end device 30. This satisfies the requirement that the traction rope 61 controls the lifting and lowering of the car 10 through the car anti-rope wheel 12. Here, to avoid positional interference between the portion of the traction rope 61 located between the first guide wheel 211 and the first hoistway decorative panel 91 and the first hoistway decorative panel 91, the first guide wheel 211 is moved a certain distance away from the counterweight assembly 40 toward the car 10. This allows the overall structure of the hoistway top frame 20 to avoid extending to the upper part of the counterweight assembly 40, and reduces the overall size of the hoistway top frame 20, thereby reducing costs.

[0053] like Figure 1 As shown, in this first embodiment, the car suspension end-connecting device 30 is arranged horizontally; and a deflector 22 is also installed above the top frame 20 of the shaft. The traction rope 61, after passing through the car deflector 12, is connected to the car suspension end-connecting device 30 after passing through the deflector 22. That is to say, the platform ladder 100 in this embodiment uses the horizontally arranged car suspension end-connecting device 30 to fix the other end of the traction rope 61. By utilizing the horizontal arrangement of the car suspension end-connecting device 30, the space occupied on the top floor of the shaft required for the installation of the car suspension end-connecting device 30 can be reduced, so that the platform ladder 100 can be used in application scenarios with low top floor spaces.

[0054] like Figure 3 As shown, in the platform ladder 100 provided in the second embodiment of this application, the only difference between the platform ladder 100 in this embodiment and the platform ladder 100 provided in the first embodiment is that: the car suspension end-connecting device 30 is arranged vertically, installed on the top frame 20 of the shaft, and forms a perpendicular relationship with the top frame 20 of the shaft; and the traction rope 61, after passing through the car anti-rope sheave 12, is connected to the car suspension end-connecting device 30. This simplifies the structure required to fix the other end of the traction rope 61, omits the anti-rope sheave 22 in the first embodiment, and reduces costs.

[0055] like Figure 4 , Figure 5 As shown, in the platform ladder 100 provided in the third embodiment of this application, the number of car anti-cord pulleys 12 is configured to be an even number, and the even number of car anti-cord pulleys 12 are symmetrically arranged with respect to the center line of the car 10. Here, the number of car anti-cord pulleys 12 is configured to be two. Of course, in other embodiments, the number of car anti-cord pulleys 12 can also be configured to be four, six, etc.

[0056] like Figure 4 , Figure 5As shown, in this third embodiment, the guide wheel assembly 21 includes a first guide wheel 211 and a second guide wheel 212. The traction rope 61 passes sequentially around the first guide wheel 211 and the second guide wheel 212, extends vertically downwards, passes sequentially around an even number of car anti-rope pulleys 12, and then extends vertically upwards and connects to the car suspension end device 30, so that the traction rope 61 can control the lifting and lowering of the car 10 through the two car anti-rope pulleys 12. Similar to the platform ladder 100 provided in the first embodiment of this application, the first guide wheel 211 in this embodiment is also moved a certain distance away from the counterweight assembly 40 in the direction towards the car 10.

[0057] like Figure 4 As shown, in this third embodiment, the car suspension termination device 30 is arranged horizontally; and a reversing sheave 22 is also installed on the top frame 20 of the shaft. The traction rope 61, after passing through an even number of car reversing sheaves 12, connects to the car suspension termination device 30 after passing through the reversing sheave 22. That is to say, the platform ladder 100 in this embodiment uses the horizontally arranged car suspension termination device 30 to fix the other end of the traction rope 61. By utilizing the horizontal arrangement of the car suspension termination device 30, the space occupied on the top floor of the shaft required for its installation can be reduced, so that the platform ladder 100 can be used in application scenarios with low top floor spaces.

[0058] like Figure 6 As shown, in the platform ladder 100 provided in the fourth embodiment of this application, the only difference between the platform ladder 100 in this embodiment and the platform ladder 100 provided in the third embodiment is that the car suspension end device 30 is arranged vertically; and the traction rope 61, after passing through an even number of car anti-cord pulleys 12, is connected to the car suspension end device 30. This simplifies the structure required to fix the other end of the traction rope 61, thereby reducing costs.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A platform ladder, characterized in that, The platform ladder (100) includes: The car (10) includes a car top beam (11), on which a car anti-rope pulley (12) is installed, and the bearing center point of the car anti-rope pulley (12) is set on the center line of the car (10); The top frame (20) of the shaft is set in the elevator shaft and located above the car (10). The top frame (20) of the shaft is equipped with a guide wheel assembly (21). A counterweight assembly (40) is provided on the rear side of the car (10), and a counterweight anti-rope pulley (41) is installed on the counterweight assembly (40). The traction system (60) includes a traction rope (61), a traction sheave (62), and a traction machine. One end of the traction rope (61) is connected to the counterweight counterweight sheave (41) after passing through the traction sheave (62). The other end of the traction rope (61) is connected to the car counterweight sheave (12) after passing through the traction sheave (62) and the guide wheel assembly (21). The traction sheave (62) is connected to the traction machine to provide power to the traction rope (61) in order to control the lifting and lowering of the car (10).

2. The platform ladder according to claim 1, characterized in that, The platform elevator (100) also includes a car suspension end connection device (30), which is installed above the car (10); The number of the car anti-cord pulleys (12) is configured to be one, and the car anti-cord pulleys (12) are set on the center line of the car (10); and the guide wheel group (21) includes a first guide wheel (211) and a second guide wheel (212). The traction rope (61) passes through the first guide wheel (211) and the second guide wheel (212) in sequence, extends vertically downward, passes through the car anti-cord pulleys (12), extends vertically upward, and is connected to the car suspension end device (30). Alternatively, the number of the car anti-cord pulleys (12) is configured to be an even number, and the even number of car anti-cord pulleys (12) are symmetrically arranged with respect to the center line of the car (10); and the guide wheel group (21) includes a first guide wheel (211) and a second guide wheel (212), the traction rope (61) passes through the first guide wheel (211) and the second guide wheel (212) in sequence, extends vertically downward, passes through the even number of car anti-cord pulleys (12) in sequence, extends vertically upward, and is connected to the car suspension end device (30).

3. The platform ladder according to claim 2, characterized in that, The car suspension end connection device (30) is arranged horizontally and is located above the top frame (20) of the shaft. A deflector pulley (22) is also installed on the top frame (20) of the shaft. The position of the deflector pulley (22) is higher than that of the second guide pulley (212). The traction rope (61) after passing through the deflector pulley (12) is connected to the car suspension end device (30) after passing through the deflector pulley (22).

4. The platform ladder according to claim 2, characterized in that, The car suspension end device (30) is arranged vertically and installed on the top frame (20) of the hoistway, and forms a perpendicular relationship with the top frame (20) of the hoistway. The traction rope (61) after passing through the car anti-rope wheel (12) is connected to the car suspension end device (30).

5. The platform ladder according to claim 1, characterized in that, The platform elevator (100) also includes a first shaft decorative panel (91), which is located between the counterweight assembly (40) and the car (10) to cover the counterweight assembly (40).

6. The platform ladder according to claim 5, characterized in that, The platform ladder (100) also includes a counterweight guide rail (70), and the counterweight assembly (40) is slidably connected to the counterweight guide rail (70); A platform frame (71) is installed on the counterweight guide rail (70). The platform frame (71) is vertically positioned above the first shaft decorative panel (91) and connected to the first shaft decorative panel (91). The traction machine is fixedly installed on the platform frame (71).

7. The platform ladder according to claim 6, characterized in that, The platform ladder (100) also includes a counterweight suspension end device (50), which is arranged vertically and forms a perpendicular relationship with the platform frame (71); and the traction rope (61) after passing through the counterweight anti-rope wheel (41) is connected to the counterweight suspension end device (50).

8. The platform ladder according to claim 1, 5, or 6, characterized in that, The platform elevator (100) also includes a second shaft decorative panel (92), which is located between the car (10) and the shaft top frame (20) to cover the shaft top frame (20).

9. The platform ladder according to claim 8, characterized in that, The guide wheel assembly (21) includes a first guide wheel (211) and a second guide wheel (212). The first guide wheel (211) is located below the second guide wheel (212), and the traction rope (61) passes through the traction wheel (62) and then wraps around the first guide wheel (211) and the second guide wheel (212) in sequence.

10. The platform ladder according to claim 1, characterized in that, The platform elevator (100) also includes a car guide rail (80), and the car (10) is slidably connected to the car guide rail (80); The car guide rail (80) is located on the rear side of the car (10).

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