Layer door self-closing device and elevator

Abstract

The application relates to a layer door self-closing device and an elevator. The layer door self-closing device comprises a first pulley, a second pulley, a third pulley, a fourth pulley, a fifth pulley and a weight assembly. The first pulley is arranged on a guide rail frame. The second pulley is arranged on a first hanging plate of an arc-shaped layer door. The third pulley is arranged on a second hanging plate of the arc-shaped layer door. The fourth pulley is arranged on the first hanging plate away from the second hanging plate. The fifth pulley is arranged on the second hanging plate away from the first hanging plate. The weight assembly comprises a connecting rope, a first weight and a second weight. The first weight is movably arranged on the side of the first door plate away from the second door plate. The second weight is movably arranged on the side of the second door plate away from the first door plate. One end of the connecting rope is connected with the first weight. The other end of the connecting rope is connected with the second weight after sequentially penetrating through the fourth pulley, the second pulley, the first pulley, the third pulley and the fifth pulley. The layer door self-closing device and the elevator have the advantages of high reliability and good safety.

Description

Technical Field

[0001] This application relates to the field of elevator equipment technology, and in particular to a landing door self-closing device and an elevator. Background Technology

[0002] In the elevator industry, the automatic door closing device is a key component ensuring elevator safety. Its core function is to ensure that the landing door automatically closes and locks after the elevator car leaves the unlocked area, preventing people from accidentally entering the shaft and causing accidents. Currently, automatic door closing devices are mainly used in ordinary horizontal sliding elevator landing doors. This type of landing door has a straight running trajectory, which can effectively adapt to the structural characteristics of the automatic door closing device, ensuring smooth traction of the connecting rope and stable operation.

[0003] However, applying conventional door self-closing devices to curved landing doors presents several technical problems: First, due to the curved running trajectory of the door, the connecting rope is at an angle when connecting to the counterweight, making it prone to derailment and causing the door self-closing function to fail. Second, the curved running trajectory makes the connecting rope prone to interference with other elevator components during traction, accelerating component wear, shortening the service life of the door self-closing device, and even causing safety malfunctions such as door jamming. Therefore, current door self-closing devices applied to curved landing doors suffer from poor safety and low stability. Summary of the Invention

[0004] Therefore, it is necessary to provide a landing door self-closing device and an elevator to address the problems of poor safety and low stability when applied to curved landing doors.

[0005] This invention provides a self-closing device for landing doors, installed on curved landing doors, comprising: The first pulley is used for mounting on the guide rail frame; The second pulley is used to install on the first hanging plate of the elevator curved door, and the third pulley is used to install on the second hanging plate of the elevator curved door; A fourth pulley and a fifth pulley, wherein the fourth pulley is used to be installed on the side of the first hanging plate away from the second hanging plate, and the fifth pulley is used to be installed on the side of the second hanging plate away from the first hanging plate; A counterweight assembly includes a connecting rope, a first counterweight, and a second counterweight. The first counterweight is movably mounted on the side of the first door panel away from the second door panel, and the second counterweight is movably mounted on the side of the second door panel away from the first door panel. One end of the connecting rope is connected to the first counterweight, and the other end of the connecting rope passes sequentially through the fourth pulley, the second pulley, the first pulley, the third pulley, and the fifth pulley before connecting to the second counterweight.

[0006] In one embodiment, the rotation axes of the first pulley, the second pulley, and the third pulley are all parallel to the arcuate surface of the arcuate door, while the rotation axes of the fourth pulley and the fifth pulley are perpendicular to the arcuate surface of the arcuate door.

[0007] In one embodiment, the first pulley is mounted on the guide rail frame at a position corresponding to the closed surfaces of the first door panel and the second door panel, and the second pulley and the third pulley are symmetrically arranged with respect to the closed surfaces of the first door panel and the second door panel.

[0008] In one embodiment, the second pulley includes at least two, and the at least two second pulleys are installed at intervals on the first hanging plate along the running trajectory of the first door panel. The third pulley includes at least two, and the at least two third pulleys are installed at intervals on the second hanging plate along the running trajectory of the second door panel.

[0009] In one embodiment, the counterweight assembly further includes a first sleeve and a second sleeve, the first sleeve being connected to the side of the first door panel away from the second door panel, the first counterweight being movably disposed within the first sleeve, and the second sleeve being connected to the side of the second door panel away from the first door panel, the second counterweight being movably disposed within the second sleeve.

[0010] In one embodiment, the self-closing device of the landing door further includes a locking assembly, which includes a third bracket and a locking member. The third bracket is connected to the guide rail frame and has a mounting hole. The locking member is movably installed in the mounting hole, and the direction of movement of the locking member corresponds to the rope groove of the first pulley, so that the locking member locks or releases the connecting rope.

[0011] In one embodiment, the automatic door closing device includes a first mounting bracket, a second mounting bracket, and a third mounting bracket. The first mounting bracket is connected to the guide rail frame and has a first rotating shaft. A first pulley is rotatably mounted on the first rotating shaft. The second mounting bracket is connected to the first hanging plate and has a second rotating shaft. A second pulley is rotatably mounted on the second rotating shaft. The third mounting bracket is connected to the second hanging plate and has a third rotating shaft. A third pulley is rotatably mounted on the third rotating shaft.

[0012] In one embodiment, the automatic door closing device includes a first bracket and a first support, the first bracket being connected to the side of the first hanging plate away from the second hanging plate, the first support being connected to the first bracket, the first support having a fourth pivot, and a fourth pulley being rotatably mounted on the fourth pivot; the automatic door closing device also includes a second bracket and a second support, the second bracket being connected to the side of the second hanging plate away from the first hanging plate, the second support being connected to the second bracket, the second support having a fifth pivot, and a fifth pulley being rotatably mounted on the fifth pivot.

[0013] In one embodiment, the automatic door closing device includes a first bearing, a second bearing, a third bearing, a fourth bearing, and a fifth bearing. The first bearing is provided between the first pulley and the first rotating shaft, the second bearing is provided between the second pulley and the second rotating shaft, the third bearing is provided between the third pulley and the third rotating shaft, the fourth bearing is provided between the fourth pulley and the fourth rotating shaft, and the fifth bearing is provided between the fifth pulley and the fifth rotating shaft.

[0014] The present invention also provides an elevator, including an arc-shaped landing door and a landing door self-closing device according to the above embodiments, wherein the landing door self-closing device is installed on the arc-shaped landing door.

[0015] The aforementioned self-closing device for landing doors and the elevator utilize a first pulley mounted on the guide rail frame, a second and fourth pulleys correspondingly mounted on the first hanging plate linked to the first door panel, and a third and fifth pulleys correspondingly mounted on the second hanging plate linked to the second door panel. This allows the connecting rope between the first and second counterweights to form a preset winding path with the fourth, second, first, third, and fifth pulleys. In other words, the fourth, second, first, third, and fifth pulleys on the curved landing door ensure that the winding path of the connecting rope perfectly matches the curved running trajectory of the elevator door, preventing the connecting rope from protruding from the landing sill. This effectively avoids interference between the connecting rope and other elevator components during traction, significantly reducing component wear and extending the device's service life. The relatively fixed exit angles of the connecting rope at the fourth and fifth pulleys fundamentally avoid the risk of self-closing function failure due to the connecting rope derailing, significantly improving the safety and stability of the elevator's curved door operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram comparing the positions of the self-closing door device described in this application embodiment when it is in the open and closed states.

[0017] Figure 2 This is a schematic diagram of the structure of the self-closing door device described in the embodiment of this application when the door is closed.

[0018] Figure 3 This is a schematic diagram of the structure of the self-closing device for the floor door in the open state according to an embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the structure of the self-closing door device described in the embodiments of this application.

[0020] Figure 5 This is a schematic diagram of the locking assembly of the self-closing device for the landing door described in an embodiment of this application.

[0021] Figure 6 This is a schematic diagram of the structure of the first pulley of the self-closing device for the landing door described in an embodiment of this application.

[0022] Icon labels: 10. Automatic closing device for landing doors; 20. Curved landing door; 21. Guide rail frame; 22. First hanging plate; 23. Second hanging plate; 24. First door panel; 25. Second door panel; 26. Landing door sill; 100. First pulley; 110. First mounting bracket; 111. First shaft; 120. First bearing; 200. Second pulley; 210. Second mounting bracket; 300. Third pulley; 310. Third mounting bracket; 400. Fourth pulley; 410. First support; 420. First bracket; 500. Fifth pulley; 510. Second support; 520. Second bracket; 600. Counterweight assembly; 610. Connecting rope; 620. First counterweight; 630. Second counterweight; 640. First sleeve; 650. Second sleeve; 700, Locking assembly; 710, Third bracket; 711, Mounting hole; 720, Locking element. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0024] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0025] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0029] See Figures 1 to 4 , Figure 1 This illustration shows a comparative diagram of the positions of the landing door self-closing device in the open and closed states according to an embodiment of this application. Figures 2 to 4 A schematic diagram of the structure of a landing door self-closing device according to an embodiment of this application is shown. The landing door self-closing device is installed on an arc-shaped landing door 20. Specifically, the arc-shaped landing door 20 includes a guide rail frame 21, a first hanging plate 22, a second hanging plate 23, a first door panel 24, and a second door panel 25. The first hanging plate 22 is connected to the first door panel 24, and the second hanging plate 23 is connected to the second door panel 25. The guide rail frame 21 is installed on the door beam. Both the first hanging plate 22 and the second hanging plate 23 are movably connected to the guide rail frame 21 so that the first door panel 24 and the second door panel 25 follow an arc-shaped trajectory.

[0030] The self-closing device for the landing door includes a first pulley 100, a second pulley 200, a third pulley 300, a fourth pulley 400, a fifth pulley 500, and a counterweight assembly 600. The first pulley 100 is mounted on the guide rail frame 21, the second pulley 200 is mounted on the first hanging plate 22 of the curved landing door 20, and the third pulley 300 is mounted on the second hanging plate 23 of the curved landing door 20. The fourth pulley 400 is mounted on the side of the first hanging plate 22 away from the second hanging plate 23, and the fifth pulley 500 is mounted on the side of the second hanging plate 23 away from the first hanging plate 22.

[0031] The counterweight assembly 600 includes a connecting rope 610, a first counterweight 620, and a second counterweight 630. The first counterweight 620 is movably disposed on the side of the first door panel 24 away from the second door panel 25, and the second counterweight 630 is movably disposed on the side of the second door panel 25 away from the first door panel 24. One end of the connecting rope 610 is connected to the first counterweight 620, and the other end of the connecting rope 610 passes through the fourth pulley 400, the second pulley 200, the first pulley 100, the third pulley 300, and the fifth pulley 500 in sequence before connecting to the second counterweight 630.

[0032] The self-closing device for the landing door described in this application embodiment uses a first pulley 100 on the guide rail frame 21, a second pulley 200 and a fourth pulley 400 on the first hanging plate 22 linked to the first door panel 24, and a third pulley 300 and a fifth pulley 500 on the second hanging plate 23 linked to the second door panel 25. This allows the connecting rope 610 connecting the first counterweight 620 and the second counterweight 630 to form a preset winding path with the fourth pulley 400, the second pulley 200, the first pulley 100, the third pulley 300, and the fifth pulley 500. In other words, the fourth pulley 400, the second pulley 200, the first pulley 100, the third pulley 300, and the fifth pulley 500 on the arc-shaped landing door 20 make the movement trajectory of the connecting rope 610 completely match the arc-shaped running trajectory of the arc-shaped landing door 20.

[0033] The self-closing device for landing doors described in this application embodiment, by setting a fourth pulley 400 on the side of the first hanging plate 22 and a fifth pulley 500 on the side of the second hanging plate 23, makes the lead-out angle of the connecting rope 610 at the fourth pulley 400 and the lead-out angle of the fifth pulley 500 relatively fixed, fundamentally avoiding the risk of self-closing function failure caused by the connecting rope 610 going out of the groove. At the same time, the second pulley 200 and the third pulley 300 make the connecting rope 610 form an arc that matches the first door plate 24 and the second door plate 25, completely avoiding the connecting rope 610 protruding from the landing door sill 26, thereby effectively avoiding interference between the connecting rope 610 and other elevator components during the traction process, greatly reducing component wear, extending the service life of the device, and significantly improving the safety and stability of the operation of the arc-shaped landing door 20.

[0034] In one exemplary embodiment, the connecting rope 610 is a steel wire rope. Steel wire rope has the characteristics of high tensile strength, good wear resistance, not easy to stretch and deform, and long service life. It can reliably transmit tension, ensure stable self-closing force, and improve the operational reliability and safety of the door self-closing device.

[0035] In some embodiments, such as Figures 1 to 4 As shown, the rotation axes of the first pulley 100, the second pulley 200, and the third pulley 300 are all parallel to the arc-shaped surface of the arc-shaped door 20, while the rotation axes of the fourth pulley 400 and the fifth pulley 500 are perpendicular to the arc-shaped surface of the arc-shaped door 20.

[0036] In other words, the first pulley 100, the second pulley 200, and the third pulley 300 rotate on the horizontal plane, stably guiding the connecting rope 610 to move smoothly along the arc-shaped opening and closing trajectory of the arc-shaped landing door 20 within the horizontal plane. The rotation axes of the fourth pulley 400 and the fifth pulley 500 on both sides are perpendicular to the arc-shaped surface of the arc-shaped landing door, which can precisely and smoothly convert the connecting rope 610 moving in the horizontal plane to vertical movement, realizing the stable transmission of horizontal traction force and vertical tension force.

[0037] In this embodiment, the first pulley 100, the second pulley 200, and the third pulley 300 stably guide the connecting rope 610 to move smoothly along the arc-shaped opening and closing trajectory of the arc-shaped landing door 20 in the horizontal plane. This ensures that the horizontal direction of the connecting rope 610 is completely matched with the movement trajectory of the first door panel 24 and the second door panel 25, effectively avoiding interference between the connecting rope 610 and other components, and preventing the safety hazards caused by the connecting rope 610 protruding from the landing door sill 26. The fourth pulley 400 and the fifth pulley 500 can precisely and smoothly convert the horizontally moving connecting rope 610 to vertically moving movement, realizing the stable transmission of horizontal traction force and vertical tension force. At the same time, they precisely fix the entry angle of the connecting rope 610, fundamentally solving the problem of the connecting rope 610 dislodging and jamming caused by the deviation of the entry angle, and ensuring the continuous reliability of the landing door's self-closing function.

[0038] In an optional embodiment, such as Figures 1 to 4 As shown, the first pulley 100 is installed on the guide rail frame 21 at a position corresponding to the closed surfaces of the first door panel 24 and the second door panel 25. The second pulley 200 and the third pulley 300 are symmetrically arranged with respect to the closed surfaces of the first door panel 24 and the second door panel 25. Specifically, the first pulley 100 is located at the center of the running trajectory of the curved landing door 20, and the second pulley 200 and the third pulley 300 are symmetrically arranged with respect to the center of the running trajectory of the curved landing door 20.

[0039] In this embodiment, by installing the first pulley 100 on the guide rail frame 21 at the position corresponding to the closed surfaces of the first door panel 24 and the second door panel 25, it can serve as the central positioning fulcrum of the traction path of the connecting rope 610. This ensures that the path of the connecting rope 610 transmitting traction force to the first door panel 24 and the second door panel 25 is symmetrical and the lever arm is balanced, providing a stable reference support for the synchronous opening and closing of the first door panel 24 and the second door panel 25. At the same time, it optimizes the overall winding path of the connecting rope 610, further adapts to the arc-shaped running trajectory of the arc-shaped floor door 20, and reduces the risk of interference and derailment between the connecting rope 610 and surrounding components. With the second pulley 200 and the third pulley 300 arranged symmetrically relative to the closed surface, the traction force of the connecting rope 610 on the first hanging plate 22 and the second hanging plate 23 on both sides can be transmitted synchronously. Combined with the counterweight pulling force of the first counterweight 620 and the second counterweight 630 respectively located on both sides, the first door panel 24 and the second door panel 25 are subjected to uniform force and the opening and closing strokes are completely synchronized during the self-closing process. This effectively avoids problems such as the first door panel 24 and the second door panel 25 being offset or misaligned when closing, and ensures the accuracy and reliability of the locking action after the curved floor door 20 is automatically closed.

[0040] In an optional embodiment, such as Figures 1 to 4 As shown, the second pulley 200 includes at least two pulleys, which are installed at intervals on the first hanging plate 22 along the running track of the first door panel 24. The third pulley 300 includes at least two pulleys, which are installed at intervals on the second hanging plate 23 along the running track of the second door panel 25.

[0041] This embodiment employs a multi-point guiding structure design, with at least two second pulleys 200 spaced apart on the first hanging plate 22 and at least two third pulleys 300 spaced apart on the second hanging plate 23. By utilizing the multiple spaced second and third pulleys 200, the connecting rope 610 is precisely guided and limited in segments throughout its travel. This effectively controls the movement trajectory of the connecting rope 610, ensuring it closely approximates and perfectly matches the curved running trajectory of the curved landing door 20. This fundamentally solves the problem of connection issues when conventional single-pulley guiding structures are applied to curved landing doors 20. The core technical defect of the mismatch between the trajectory of rope 610 and the arc-shaped running trajectory is eliminated. This ensures that the connecting rope 610 always maintains the same direction as the arc-shaped landing door 20 throughout its entire opening and closing process, completely eliminating the safety hazards caused by the connecting rope 610 protruding from the landing door sill 26. At the same time, it can stably control the entry angle of the connecting rope 610 into the groove at each reversing pulley, avoiding the risk of the connecting rope 610 going out of the groove or getting stuck. It can also effectively avoid interference between the connecting rope 610 and surrounding components during the traction process, greatly reducing component wear and extending the service life of the landing door self-closing device 10.

[0042] In an optional embodiment, such as Figures 1 to 4As shown, the counterweight assembly 600 also includes a first sleeve 640 and a second sleeve 650. The first sleeve 640 is connected to the side of the first door panel 24 away from the second door panel 25. The first counterweight 620 is movably disposed in the first sleeve 640. The second sleeve 650 is connected to the side of the second door panel 25 away from the first door panel 24. The second counterweight 630 is movably disposed in the second sleeve 650.

[0043] This embodiment provides a closed-loop limit and precise guidance for the vertical lifting and lowering movement of the first and second weights 620 and 630 on both sides of the elevator's curved surface during opening and closing and during dynamic changes in counterweight tension. This avoids swaying, offsetting, or jamming of the first and second weights 620 and 630 during opening and closing of the elevator's curved surface and during dynamic changes in counterweight tension. It ensures stable and uniform output of the weight tension, and ensures that the self-closing force of the landing door is controllable throughout the process. It perfectly adapts to the dynamic force requirements during the opening and closing of the curved landing door 20, and effectively improves the operational reliability of the landing door self-closing device 10.

[0044] Combination Figure 5 The diagram shows a locking assembly 700 of the landing door self-closing device according to one embodiment of the present application. In an optional embodiment, the landing door self-closing device 10 further includes a locking assembly 700, which includes a third bracket 710 and a locking member 720. The third bracket 710 is connected to the guide rail frame 21 and has a mounting hole 711. The locking member 720 is movably installed in the mounting hole 711. The direction of movement of the locking member 720 corresponds to the rope groove of the first pulley 100, so that the locking member 720 locks or releases the connecting rope 610 relative to the first pulley 100.

[0045] In this embodiment, a locking component 700 is provided on the first pulley 100, and a movable locking component 720 is installed on the third bracket 710. The locking component 720 can lock and release the connecting rope 610 at the first pulley 100. It can accurately lock the relative position of the connecting rope 610 at the first pulley 100 during installation, debugging and operation, and fundamentally limit the displacement of the connecting rope 610. This effectively solves the problem that the weights are prone to unilateral offset when the connecting rope 610 is paired with the first weight 620 and the second weight 630 of equal weight. This avoids uneven force on the first door panel 24 and the second door panel 25, asynchronous opening and closing and imbalance of self-closing force, and further improves the stability and safety of the floor door self-closing device 10.

[0046] In one exemplary embodiment, such as Figure 5As shown, the mounting hole is a threaded hole, and the locking member 720 is a bolt or screw. The bolt or screw is installed in the threaded hole. By rotating the locking member 720, the axial position of the locking member 720 can be adjusted, thereby abutting against the locking connecting rope 610 or releasing the connecting rope 610.

[0047] In an optional embodiment, such as Figure 4 and Figure 6 As shown, the automatic door closing device 10 includes a first mounting frame 110, a second mounting frame 210, and a third mounting frame 310. The first mounting frame 110 is connected to the guide rail frame 21 and has a first rotating shaft 111. A first pulley 100 is rotatably mounted on the first rotating shaft 111. The second mounting frame 210 is connected to the first hanging plate 22 and has a second rotating shaft. A second pulley 200 is rotatably mounted on the second rotating shaft. The third mounting frame 310 is connected to the second hanging plate 23 and has a third rotating shaft. A third pulley 300 is rotatably mounted on the third rotating shaft.

[0048] This embodiment achieves independent and precise positioning and stable, rotatable installation of the first pulley 100, the second pulley 200, and the third pulley 300 by setting the first mounting bracket 110, the second mounting bracket 210, and the third mounting bracket 310 at each installation point. This perfectly adapts to the installation space and arc-shaped running characteristics of the guide rail frame 21, the first hanging plate 22, and the second hanging plate 23 of the curved landing door 20, greatly improving the installation accuracy, running stability, and assembly and maintenance convenience of the first pulley 100, the second pulley 200, and the third pulley 300.

[0049] In one exemplary embodiment, such as Figure 4 As shown, the first mounting bracket 110 is connected to the guide rail bracket 21 by a first fastener, the second mounting bracket 210 is connected to the first hanging plate 22 by a second fastener, and the third mounting bracket 310 is connected to the second hanging plate 23 by a third fastener. Specifically, the first, second, and third fasteners are all screws or bolts.

[0050] In an optional embodiment, such as Figure 4 As shown, the floor door self-closing device 10 includes a first bracket 410 and a first bracket 420. The first bracket 410 is connected to the side of the first hanging plate 22 away from the second hanging plate 23. The first bracket 420 is connected to the first bracket 410. The first bracket 420 is provided with a fourth rotating shaft. The fourth pulley 400 is rotatably mounted on the fourth rotating shaft.

[0051] Furthermore, such as Figure 4As shown, the floor door self-closing device 10 includes a second bracket 510 and a second bracket 520. The second bracket 510 is connected to the side of the second hanging plate 23 away from the first hanging plate 22. The second bracket 520 is connected to the second bracket 510. The second bracket 520 is provided with a fifth rotating shaft. The fifth pulley 500 is rotatably mounted on the fifth rotating shaft.

[0052] In this embodiment, the fourth pulley 400 is securely mounted on the outside of the first hanging plate 22 by the first bracket 410 and the first bracket 420, and the fifth pulley 500 is securely mounted on the outside of the second hanging plate 23 by the second bracket 510 and the second bracket 520. This achieves precise positioning and flexible rotation of the fourth and fifth pulleys 400 and 500, ensuring that the rotation axes of the fourth and fifth pulleys 400 and 500 are perpendicular to the arc-shaped surface. This allows for a stable and reliable conversion of the connecting rope 610 from a horizontal to a vertical direction, effectively fixing the angle at which the connecting rope 610 enters the groove and preventing issues such as detachment, interference, and protrusion from the sill. Simultaneously, this installation structure boasts high strength, accurate positioning, and simple assembly. It can move synchronously along the arc-shaped trajectory with the first and second hanging plates 22 and 23, ensuring that the reversing guide always matches the movement of the first door panel 24 and the second door panel 25, thus improving the stability, reliability, and service life of the landing door self-closing device 10.

[0053] In an exemplary embodiment, the first bracket 410 is connected to the first hanging plate 22 by a fourth fastener, the first bracket 420 is connected to the first bracket 410 by a fifth fastener, the second bracket 510 is connected to the second hanging plate 23 by a sixth fastener, and the second bracket 520 is connected to the second bracket 510 by a sixth fastener. Specifically, the fourth, fifth, sixth, and seventh fasteners are all screws or bolts.

[0054] In an optional embodiment, such as Figure 4 and Figure 6 As shown, the automatic door closing device 10 includes a first bearing 120, a second bearing, a third bearing, a fourth bearing, and a fifth bearing. The first bearing 120 is provided between the first pulley 100 and the first rotating shaft 111, the second bearing is provided between the second pulley 200 and the second rotating shaft, the third bearing is provided between the third pulley 300 and the third rotating shaft, the fourth bearing is provided between the fourth pulley 400 and the fourth rotating shaft, and the fifth bearing is provided between the fifth pulley 500 and the fifth rotating shaft.

[0055] This embodiment, by setting a first bearing 120, a second bearing, a third bearing, a fourth bearing, and a fifth bearing, fundamentally reduces the rotational friction resistance at the mating points of the first pulley 100, the second pulley 200, the third pulley 300, the fourth pulley 400, and the fifth pulley 500 with their corresponding rotating shafts. This significantly improves the smoothness and flexibility of the rotation of the first pulley 100, the second pulley 200, the third pulley 300, the fourth pulley 400, and the fifth pulley 500, and avoids the first pulley 100, the second pulley 200, the third pulley 300, the fourth pulley 400, and the fifth pulley 500. The third pulley 300, fourth pulley 400 and fifth pulley 500 may experience rotational jamming or sticking, leading to problems such as poor traction of the connecting rope 610, deviation of the groove angle, disengagement from the groove or uneven force. This device is perfectly adapted to the high-frequency operating conditions of the curved landing door 20 under the dynamic change of the traction angle of the connecting rope 610 in the curved running trajectory. It can stably ensure the accurate and reliable realization of the horizontal guidance and vertical reversing function of the connecting rope 610, and significantly improve the overall operational reliability, stability and service life of the landing door self-closing device 10.

[0056] On the other hand, embodiments of this application also provide an elevator, such as Figures 1 to 4 As shown, it includes an arc-shaped landing door 20 and a landing door self-closing device 10 as described in any of the above embodiments, with the landing door self-closing device 10 installed on the arc-shaped landing door 20.

[0057] The elevator described in this embodiment, by installing a landing door self-closing device 10 on the arc-shaped landing door 20, and setting a fourth pulley 400 on the side of the first hanging plate 22 and a fifth pulley 500 on the side of the second hanging plate 23, makes the lead-out angle of the connecting rope 610 at the fourth pulley 400 and the lead-out angle of the fifth pulley 500 relatively fixed, fundamentally avoiding the risk of self-closing function failure caused by the connecting rope 610 going out of the groove. At the same time, the second pulley 200 and the third pulley 300 make the connecting rope 610 form an arc that matches the first door plate 24 and the second door plate 25, completely avoiding the connecting rope 610 protruding from the landing door sill 26, thereby effectively avoiding interference between the connecting rope 610 and other elevator components during the traction process, greatly reducing component wear, extending the service life of the device, and significantly improving the safety and stability of the arc-shaped landing door 20 operation.

[0058] 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.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A self-closing device (10) for a landing door, installed on an arc-shaped landing door (20), characterized in that, The automatic door closing device (10) includes: The first pulley (100) is used to be mounted on the guide rail frame (21). The second pulley (200) and the third pulley (300) are used to install the second hanging plate (22) of the elevator curved door (20) and the third pulley (300) is used to install the second hanging plate (23) of the elevator curved door (20). A fourth pulley (400) and a fifth pulley (500), wherein the fourth pulley (400) is installed on the side of the first hanging plate (22) away from the second hanging plate (23), and the fifth pulley (500) is installed on the side of the second hanging plate (23) away from the first hanging plate (22); A counterweight assembly (600) includes a connecting rope (610), a first counterweight (620), and a second counterweight (630). The first counterweight (620) is movably disposed on the side of the first door panel (24) away from the second door panel (25), and the second counterweight (630) is movably disposed on the side of the second door panel (25) away from the first door panel (24). One end of the connecting rope (610) is connected to the first counterweight (620), and the other end of the connecting rope (610) passes sequentially through the fourth pulley (400), the second pulley (200), the first pulley (100), the third pulley (300), and the fifth pulley (500) before being connected to the second counterweight (630).

2. The self-closing device (10) for the landing door according to claim 1, characterized in that: The rotation axis of the first pulley (100), the rotation axis of the second pulley (200) and the rotation axis of the third pulley (300) are all parallel to the arc surface of the arc-shaped door (20), and the rotation axis of the fourth pulley (400) and the rotation axis of the fifth pulley (500) are perpendicular to the arc surface of the arc-shaped door (20).

3. The self-closing device (10) for the landing door according to claim 1, characterized in that: The first pulley (100) is installed on the guide rail frame (21) at the position corresponding to the closed surface of the first door panel (24) and the second door panel (25), and the second pulley (200) and the third pulley (300) are symmetrically arranged with respect to the closed surface of the first door panel (24) and the second door panel (25).

4. The self-closing device (10) for the landing door according to claim 3, characterized in that: The second pulley (200) includes at least two, and at least two second pulleys (200) are installed at intervals on the first hanging plate (22) along the running trajectory of the first door panel (24). The third pulley (300) includes at least two, and at least two third pulleys (300) are installed at intervals on the second hanging plate (23) along the running trajectory of the second door panel (25).

5. The self-closing device (10) for the landing door according to claim 1, characterized in that: The counterweight assembly (600) further includes a first sleeve (640) and a second sleeve (650). The first sleeve (640) is connected to the side of the first door panel (24) away from the second door panel (25). The first counterweight (620) is movably disposed in the first sleeve (640). The second sleeve (650) is connected to the side of the second door panel (25) away from the first door panel (24). The second counterweight (630) is movably disposed in the second sleeve (650).

6. The self-closing device (10) for the landing door according to claim 1, characterized in that: The self-closing device (10) of the floor door also includes a locking assembly (700), which includes a third bracket (710) and a locking member (720). The third bracket (710) is connected to the guide rail frame (21). The third bracket (710) is provided with a mounting hole (711). The locking member (720) is movably installed in the mounting hole (711). The direction of movement of the locking member (720) corresponds to the rope groove of the first pulley (100) so that the locking member (720) locks or releases the connecting rope (610).

7. The self-closing device (10) for the landing door according to claim 2, characterized in that: The self-closing device (10) of the floor door includes a first mounting bracket (110), a second mounting bracket (210) and a third mounting bracket (310). The first mounting bracket (110) is connected to the guide rail bracket (21). The first mounting bracket (110) is provided with a first rotating shaft (111). The first pulley (100) is rotatably mounted on the first rotating shaft (111). The second mounting bracket (210) is connected to the first hanging plate (22). The second mounting bracket (210) is provided with a second rotating shaft. The second pulley (200) is rotatably mounted on the second rotating shaft. The third mounting bracket (310) is connected to the second hanging plate (23). The third mounting bracket (310) is provided with a third rotating shaft. The third pulley (300) is rotatably mounted on the third rotating shaft.

8. The self-closing device (10) for the landing door according to claim 7, characterized in that: The self-closing device (10) of the floor door includes a first bracket (410) and a first bracket (420). The first bracket (410) is connected to the side of the first hanging plate (22) away from the second hanging plate (23). The first bracket (420) is connected to the first bracket (410). The first bracket (420) is provided with a fourth rotating shaft. The fourth pulley (400) is rotatably mounted on the fourth rotating shaft. The self-closing device (10) of the floor door includes a second bracket (510) and a second bracket (520). The second bracket (510) is connected to the side of the second hanging plate (23) away from the first hanging plate (22). The second bracket (520) is connected to the second bracket (510). The second bracket (520) is provided with a fifth rotating shaft. The fifth pulley (500) is rotatably mounted on the fifth rotating shaft.

9. The self-closing device (10) for the landing door according to claim 8, characterized in that: The self-closing device (10) of the floor door includes a first bearing (120), a second bearing, a third bearing, a fourth bearing and a fifth bearing. The first bearing (120) is provided between the first pulley (100) and the first rotating shaft (111). The second bearing is provided between the second pulley (200) and the second rotating shaft. The third bearing is provided between the third pulley (300) and the third rotating shaft. The fourth bearing is provided between the fourth pulley (400) and the fourth rotating shaft. The fifth bearing is provided between the fifth pulley (500) and the fifth rotating shaft.

10. An elevator, characterized in that: It includes an arc-shaped landing door (20) and a landing door self-closing device (10) as described in any one of claims 1-9, wherein the landing door self-closing device (10) is installed on the arc-shaped landing door (20).

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