A new type of level-entry device for retrofitting elevators in old buildings with curved sliding door systems.

Abstract

This utility model relates to a novel level-entry device for adding elevators to old buildings with curved sliding door systems. The device includes a curved sliding door elevator and a level-entry device. The curved sliding door elevator includes a landing door. The level-entry device includes handrails, an entrance door, an entrance door landing platform, a connecting platform, stair treads, and a landing platform. The entrance door is located on the entrance door landing platform, and the landing door is located outside the landing platform. The entrance door landing platform is connected to the landing platform via the connecting platform. The stair treads are located on the side of the connecting platform. The inner side of the landing platform of the next lower floor is connected to the inner side of the landing platform of the previous floor via the stair treads. Handrails are provided on the side of the stair treads and the connecting platform facing away from the wall. This utility model allows for level-entry without the need for a connecting corridor.

Description

Technical Field

[0001] This utility model relates to the field of staircase renovation in existing residential buildings, and in particular to a novel flat-level access device for adding elevators to old buildings with curved sliding door systems. Background Technology

[0002] Since 2018, the Chinese government has encouraged the installation of elevators in older buildings. Local governments across the country have successively introduced subsidy policies for elevator installation. However, by the end of 2024, only 130,000 elevators had been installed in older buildings in my country. Among these 130,000 installed elevators, there are two main access methods: The first is the stair-level access method, where the elevator doors are installed at the stair landing. Users need to walk up or down half a flight of stairs to get home, which does not allow for barrier-free access. Furthermore, the doorway installation requires damaging the ring beams of the older building, affecting the building's structural safety. This method is gradually decreasing. The second is the level-level access method, where the elevator doors are installed at the same level as the floor level, connecting the elevator shaft to the older building. Users can use the elevator through the connecting corridor or platform for barrier-free access. This method does not damage the ring beams of the older building and does not affect the building's structural safety, achieving barrier-free access. It is currently the main method for installing elevators in older buildings in China. There are two main types of level-entry access methods: non-entrance-door level-entry and entrance-door level-entry. Non-entrance-door level-entry involves the elevator shaft connecting to the balcony, living room, and bedrooms of the old building via a connecting corridor, providing barrier-free access. Entrance-door level-entry involves the elevator shaft connecting to the wall above the unit entrance of the old building via a connecting corridor, while replacing the old building's concrete "folded staircase" with a steel structure "straight staircase," allowing users to enter their homes barrier-free via the connecting platform of the corridor and the steel structure staircase. While these two methods enable barrier-free access when adding elevators to old buildings, they still have technical drawbacks, such as the need for connecting corridors, resulting in large elevator footprints, reduced ventilation and lighting, fewer parking spaces, and high engineering costs. Utility Model Content

[0003] To address the aforementioned technical problems in the background art, this utility model provides a novel level-entry device for adding elevators to old buildings with curved sliding door systems. This device enables level-entry without the need for connecting corridors. The curved sliding door elevator can be directly installed at the stairwell, outside the building entrance. It has the advantages of small size, small footprint, and does not affect the ventilation, passage, lighting, privacy, or parking spaces of lower-floor residents, nor does it disturb the underground pipeline network.

[0004] The technical solution of this utility model is as follows: This utility model is a novel level-entry device for adding elevators to old buildings with curved sliding doors. Its special feature is that the novel level-entry device for adding elevators to old buildings with curved sliding doors includes a curved sliding door elevator and a level-entry device. The curved sliding door elevator includes a landing door. The level-entry device includes handrails, an entrance door, an entrance door landing platform, a connecting platform, stair treads, and a landing platform. The entrance door is located on the entrance door landing platform. The landing door is located outside the landing platform. The entrance door landing platform is connected to the landing platform via the connecting platform. The stair treads are located on the side of the connecting platform. The inner side of the entrance door landing platform on the next floor is connected to the inner side of the landing platform on the previous floor via the stair treads. Handrails are provided on the side of the stair treads and the connecting platform facing away from the wall.

[0005] Furthermore, the installation of a curved sliding door elevator in an old building also includes a steel pit, a combined shaft, a traction machine room, a shaft cap, car guide rails, and a curved sliding door car. The combined shaft is located inside the steel pit, and the traction machine room is located on top of the combined shaft. There are two car guide rails, vertically fixed to the inner walls on both sides of the combined shaft. The curved sliding door car is positioned between the two guide rails. The landing doors are curved sliding door landing doors, located on the floor in front of the curved sliding door car. The traction machine in the traction machine room pulls the curved sliding door car via steel cables. The shaft cap is located on top of the traction machine room. The car includes a car frame, upper guide shoes, lower guide shoes, safety brakes, car deflector pulleys, car doors, door operators, car floor plates, and car walls. The car frame is a square frame made of welded square tubing. The car floor plates are located at the bottom of the car frame, and the car walls are located on the left, right, rear, and top sides of the car frame. There are two upper guide shoes, one on each side of the top of the car frame, and two lower guide shoes, one on each side of the bottom of the car frame. Both upper and lower guide shoes are connected to the car guide rails. There are two safety brakes, one on each side of the top of the car frame. The car deflector pulleys are mounted on the crossbeam at the top of the car frame and connected to the traction machine via wire ropes. The car doors include left and right door panels located on the front side of the car frame. The gantry crane is located at the top front of the car frame. It is a curved sliding car door crane, which includes a slider, crane mounting plate, door knife, door lock, motor, crane controller, belt, pulley, dovetail linear guide, door panel mounting plate, wire rope pulley, and circular wire rope. The crane mounting plate is located at the top front of the car frame. The door knife, door lock, motor, crane controller, belt, pulley, dovetail linear guide, slider, door panel mounting plate, wire rope pulley, and circular wire rope are all mounted on the crane mounting plate. Two sliders, left and right, are mounted on the dovetail linear guide: the door knife is mounted on the left slider, and the door lock is mounted on the right slider. The pulley is... The motor is located on the upper left side of the gate operator's fixed plate, and the gate operator controller is located next to the motor and controls it. The pulleys on the motor and the pulleys on the motor tension the belt into a ring and drive the transmission in the horizontal direction. There are two steel wire rope pulleys, one on the left and one on the right, located at the lower ends of the gate operator's fixed plate, and tension the ring steel wire rope to form a ring. The left slider is connected and fixed to one side of the belt and the upper side of the ring steel wire rope, and the right slider is connected and fixed to the lower side of the ring steel wire rope. The gate operator controller controls the motor. The gate panel is divided into two parts, one on the left and one on the right, which are connected to the left and right sliders respectively. The left and right gate panels are connected to the left and right gate panel hanging plates respectively.

[0006] Furthermore, the car door adopts a curved sliding door, which includes left and right door panels, an upper curved track, and a lower curved track. The upper and lower curved tracks are formed by bending aluminum alloy profiles with a C-shaped cross-section. The upper curved track is located below the top of the front side of the car frame, and the lower curved track is located above the bottom of the front side of the car frame. The door panels are assembled by sequentially combining multiple door panel profiles end to end. Each door panel profile is equipped with an upper pulley assembly at the top and a lower pulley assembly at the bottom. The upper pulley assembly is connected to the upper curved track, and the lower pulley assembly is connected to the lower curved track. The door panel profile includes a front panel and a rear panel that are staggered and connected by a connecting plate. The connecting plate includes a front connecting plate and a rear connecting plate, which are arranged in parallel. A slot is provided between the front and rear connecting plates to connect with the upper and lower pulley groups. A front hole and a rear hole are provided between the front and rear plates. The front hole and the rear hole are connected to the front and rear plates respectively by vertical and horizontal partitions. The radial portion of the front hole, including the outer diameter of the hole, is milled with equally spaced concave grooves by a milling machine. The radial portion of the rear hole, including the outer diameter of the hole, is milled with equally spaced convex grooves by a milling machine. The concave and convex grooves of the rear hole of the previous door panel profile and the front hole of the rear door panel profile are engaged one-to-one. The front hole and the rear hole are concentric and have the same diameter, and a long steel pin passes through them to form a hinge structure.

[0007] Furthermore, the upper pulley assembly includes an upper pulley frame, two horizontal pulleys, and two upper vertical pulleys. The two horizontal pulleys are staggered above the upper pulley frame, and the two upper vertical pulleys are parallel to each other below the upper pulley frame. Both the two horizontal pulleys and the two upper vertical pulleys are placed within an upper curved slide. A lower insert plate with a slot can be inserted is provided at the bottom of the upper pulley frame. The lower pulley assembly includes a lower pulley frame and two lower horizontal pulleys. The two lower horizontal pulleys are staggered above the lower pulley frame, and both lower horizontal pulleys are placed within a lower curved slide. A lower insert plate with a slot can be inserted is provided at the top of the lower pulley frame.

[0008] Furthermore, the curved sliding landing door includes a landing door frame, a landing door assembly, landing doors, and a landing door base plate. The landing door frame is a square frame welded from square tubing. The landing door base plate is located at the bottom of the landing door frame. The left and right sides and top of the landing door frame are enclosed with metal plates. There are two landing doors, symmetrically arranged on the front side of the landing door frame. The landing door assembly is located at the top of the front side of the landing door frame. The landing door is a curved sliding door. The landing door assembly includes a landing door operator fixing plate, a landing door wire rope pulley, a landing door ring wire rope, a landing door dovetail linear guide rail, a landing door slider, a landing door door panel hanging plate, a door ball, and a landing door lock. The landing door operator fixing plate is located at the top of the front side of the landing door frame. The landing door wire rope pulley, the landing door ring wire rope, and the landing door dovetail linear guide rail are all included. The linear guide rail, landing door slider, landing door panel hanging plate, door ball, and landing door lock are all mounted on the landing door operator fixing plate. Two landing door sliders, one on the left and one on the right, are mounted on the landing door dovetail linear guide rail. The landing door lock is mounted on the right landing door slider, and the door ball is mounted on the landing door lock. There are two landing door wire rope wheels, one on the left and one on the right, respectively mounted at the upper ends of the landing door operator fixing plate, and tensioning the landing door annular wire rope to form a ring. The upper side of the left landing door slider is fixed to the upper side of the landing door annular wire rope, and the upper side of the right landing door slider is fixed to the lower side of the landing door annular wire rope. The landing door panel hanging plate is divided into left and right sections, which are connected to the left and right landing door sliders respectively. The left and right landing doors are connected to the left and right landing door panel hanging plates respectively.

[0009] Furthermore, the combined shaft includes shaft sections and encapsulation plates. There are multiple shaft sections arranged vertically. The bottom shaft section is set in a steel pit, and the remaining shaft sections are set one per floor. Encapsulation plates are installed on all four sides of the combined shaft except for the wall-mounted parts.

[0010] Furthermore, the shaft section includes a column, a column connecting block, a crossbeam, a crossbeam connector, and a sealing plate fixing profile. The column consists of four isosceles angle steel pipes arranged symmetrically in a square. A crossbeam is installed between the columns, and the crossbeams are connected to the columns by crossbeam connectors. The sealing plate fixing profile is fixed to the inside of the column with bolts. A column connecting block is installed inside the column, and the column connecting block includes an upper connecting block and a lower connecting block. Both the upper and lower connecting blocks are isosceles angle steel blocks of the same size. The upper and lower connecting blocks are... The upper and lower connecting blocks are not embedded in the upper and lower ends of the column. Horizontal pin holes are provided on the sides of both the upper and lower connecting blocks. Both the upper and lower connecting blocks are connected to the column by steel pins passing through the horizontal pin holes. Screw holes are provided in the vertical direction of the upper connecting block, and through holes are provided in the vertical direction at the corresponding screw holes of the lower connecting block. The through holes are connected to the screw holes by hexagonal bolts. There are multiple encapsulation plates, which are fixed to the encapsulation plate fixing profile on the column by bolts. The encapsulation plates are installed in such a way that one encapsulation plate presses down on the next encapsulation plate.

[0011] Furthermore, the steel pit includes a bottom plate, bottom mounting holes, four walls, bottom reinforcing ribs, and door mounting openings. The four walls are set on the bottom plate, the bottom reinforcing ribs are welded inside the four walls, there are multiple bottom mounting holes set on the bottom plate, and door mounting openings are provided on the upper front side of the four walls.

[0012] Furthermore, the traction machine room includes a traction machine and a traction machine frame. The traction machine frame is a square frame made of square tubes welded together. A traction machine mounting chassis is set at the bottom of the traction machine frame. The traction machine is set on the traction machine mounting chassis. The traction machine is connected to the car deflector via wire ropes. The traction machine frame is securely connected to the top of the columns of the shaft section at the top of the combined shaft.

[0013] Furthermore, the shaft cover is made of metal sheet folded into a bottomless box. The top surface of the box has top reinforcing ribs and top mounting holes. The shaft cover is fixed to the top of the traction machine frame with bolts.

[0014] This utility model provides a novel level-entry device for adding elevators to old buildings with curved sliding doors. This novel level-entry method for adding elevators to old buildings is a level-entry method for the entrance door. It mainly achieves level-entry without the need for a connecting corridor by using the patent for "adding elevators to old buildings with curved sliding doors" in another case. Compared with the prior art, it has the advantages of small size and small footprint, no impact on ventilation, no impact on lighting, no reduction in parking spaces, small amount of engineering work, and low cost. It is a perfect solution for adding elevators to old buildings in China.

[0015] The curved sliding door type elevator for retrofitting old buildings provided by this utility model has the following advantages:

[0016] 1) This utility model changes the traditional left-right straight-opening door of the elevator to a curved sliding door, which greatly reduces the size of the elevator. The minimum width of the elevator can be about 1.26 meters. There is no need to set up a corridor bridge. It can be directly installed at the stairwell, outside the building entrance. In the existing multi-story (4-7 stories) residential buildings in old communities, the width of the stairwell is generally 2.3 meters to 2.7 meters. Then the width of the unit door or stairwell is also 2.3 meters to 2.7 meters. The elevator shaft width is 1.26 meters. Then the width of the unit door or stairwell is 2.2 meters to 2.7 meters. Subtracting the elevator shaft width of 1.26 meters, the remaining width is 1.04 to 1.44 meters, which can meet the requirement that the safety passage is not less than 1.0 meter and can ensure the needs of residents' normal life. The elevator shaft is 1.26 meters wide, and it must accommodate one wheelchair for barrier-free access. These two dimensions severely limit the elevator's structure, making it impossible to achieve with current domestic elevator technology. Only the curved sliding door elevator technology described in this utility model can achieve this. This utility model's curved sliding door elevator for adding elevators to old buildings achieves a small size, minimal footprint, and does not affect the ventilation, passage, lighting, privacy, fire truck access, or parking spaces of lower-floor residents (opposition from lower-floor residents to elevator installation in upper-floor units is the biggest obstacle to elevator installation in old buildings in China). It also boasts a short construction period and convenient construction.

[0017] 2) The elevator of this utility model, with an elevator shaft occupying a width of 1.26 meters and a steel pit occupying a width of 1.28 meters, can be installed at the unit door or stairwell without moving the underground pipeline network (moving the underground pipeline network is the second most difficult part of installing elevators in old buildings in China). If the underground pipeline network is on the right, the elevator can be installed on the left; if the underground pipeline network is on the left, the elevator can be installed on the right. Traditional elevator shaft pit foundations occupy an area of ​​at least 3.0 meters long and 3.0 meters wide, making it difficult to avoid underground pipeline networks, requiring the relocation of the underground pipeline network, increasing coordination and pricing costs.

[0018] 3) The curved sliding door type elevator for old buildings provided by this utility model can be manufactured in the factory and assembled on site. The elevator installation project for old buildings can be completed in fifteen days. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 A schematic diagram of the structure of the curved sliding door type elevator for adding an elevator to an old building according to this utility model;

[0021] Figure 3 This is a structural schematic diagram of the curved sliding door car of this utility model;

[0022] Figure 4This is a schematic diagram of the structure of the curved sliding car door operator of this utility model;

[0023] Figure 5 This is a schematic diagram of the curved sliding door of this utility model;

[0024] Figure 6 This is a schematic diagram of the door panel profile of this utility model;

[0025] Figure 7 This is a cross-sectional schematic diagram of the door panel profile of this utility model;

[0026] Figure 8 This is a schematic diagram of the upper pulley assembly of this utility model;

[0027] Figure 9 This is a schematic diagram of the lower pulley assembly of this utility model;

[0028] Figure 10 This is a schematic diagram of the structure of the curved sliding door type landing door of this utility model;

[0029] Figure 11 This is a schematic diagram of the structure of the landing door device of this utility model;

[0030] Figure 12 This is a schematic diagram of the combined shaft structure of this utility model;

[0031] Figure 13 This is a schematic diagram of the structure of the shaft section of this utility model;

[0032] Figure 14 This is a schematic diagram of the upper connecting block in the column connecting block of this utility model;

[0033] Figure 15 This is a structural schematic diagram of the lower connecting block in the column connecting block of this utility model;

[0034] Figure 16 This is a schematic diagram illustrating the connection method between the upper connecting block and the lower connecting block of this utility model;

[0035] Figure 17 This is a schematic diagram of the steel pit structure of this utility model;

[0036] Figure 18 This is a structural schematic diagram of the traction machine room of this utility model;

[0037] Figure 19 This is a schematic diagram of the structure of the well cap of this utility model;

[0038] Figure 20 This is a schematic diagram of the mechanical stopping device for the car of this utility model.

[0039] The annotations in the attached figures are explained as follows:

[0040] 1. Steel pit; 2. Modular hoistway; 3. Hoistway section; 4. Traction machine room; 5. Hoistway cap; 6. Car mechanical stop device; 7. Curved sliding door; 8. Curved sliding door car; 9. Curved sliding door landing door; 10. Traction machine; 11. Counterweight; 12. Wire rope; 13. Buffer; 14. Control cabinet; 15. Leveling access device;

[0041] 101. Base plate; 102. Bottom mounting holes; 103. Four walls; 104. Bottom reinforcing ribs; 105. Door mounting notch;

[0042] 201. Packaging board;

[0043] 301. Column; 302. Column connecting block; 303. Horizontal beam; 304. Horizontal beam connector; 305. Encapsulation plate fixing profile;

[0044] 401. Traction machine frame; 402. Traction machine mounting chassis; 403. Traction machine;

[0045] 501. Top reinforcing rib; 502. Top mounting hole;

[0046] 601. Fixing plate; 602. Rolling socket; 603. Pin; 604. Detection switch;

[0047] 701. Door panel; 702. Upper curved slide rail; 703. Lower curved slide rail; 704. Door panel profile; 705. Upper pulley assembly; 706. Lower pulley assembly;

[0048] 7041, Vertical partition; 7042, Rear plate; 7043, Rear connecting plate; 7044, Slot; 7045, Front connecting plate; 7046, Front hole; 7047, Front plate; 7048, Horizontal partition; 7049, Rear hole;

[0049] 7051. Upper pulley bracket; 7052. Horizontal pulley; 7053. Upper vertical pulley; 7054. Lower insert plate;

[0050] 7061. Lower pulley frame; 7062. Lower horizontal pulley; 7063. Lower insert plate;

[0051] 801. Car frame; 802. Upper guide shoe; 803. Lower guide shoe; 804. Safety brake; 805. Car anti-cord sheave; 806. Car door; 807. Door operator; 808. Car floor; 809. Car wall;

[0052] 8070, slider; 8071, door operator mounting plate; 8072, door knife; 8073, door lock; 8074, motor; 8075, door operator controller; 8076, belt; 8077, pulley; 8078, dovetail linear guide; 8080, door panel mounting plate; 8081, wire rope pulley; 8082, ring wire rope;

[0053] 901. Landing door frame; 902. Landing door assembly; 903. Landing door; 904. Landing door base plate;

[0054] 1001. Landing door operator fixing plate; 1002. Landing door wire rope pulley; 1003. Landing door ring wire rope; 1004. Landing door dovetail linear guide rail; 1005. Landing door slider; 1006. Landing door panel hanging plate; 1007. Door ball; 1008. Landing door lock;

[0055] 1300, horizontal pin hole; 1301, screw hole; 1302, through hole; 1304, hex bolt;

[0056] 1501. Handrail; 1502. Entrance door; 1503. Entrance door landing; 1504. Connecting platform; 1505. Staircase section; 1506. Landing door landing. Detailed Implementation

[0057] The overall scheme of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0058] See Figure 1The structure of this utility model includes a curved sliding door type elevator installation device for old buildings and a level entrance device 15. The curved sliding door type elevator installation device for old buildings includes a landing door. The level entrance device 15 includes a handrail 1501, an entrance door 1502, an entrance door landing platform 1503, a connecting platform 1504, a stair flight 1505, and a landing platform 1506. The entrance door 1502 is located on the entrance door landing platform 1503. The landing door is located outside the landing platform 1506. The entrance door landing platform 1503 is connected to the landing platform 1506 through the connecting platform 1504, forming a flat passage for wheelchair access and achieving barrier-free access. The landing door faces this flat passage. The stair flight 1505... 05 is located on the side of the connecting platform 1504. The inner side of the entrance platform 1503 of the next floor is connected to the inner side of the landing platform 1506 of the previous floor through the stair section 1505. Both the stair section 1505 and the connecting platform 1504 are equipped with handrails 1501 on the side facing away from the wall. In actual scenarios, this elevator can be installed on the left side of the outer wall of the unit door opening as needed. In this case, the landing door is on the left, the connecting platform 1504 and the landing platform 1506 are set on the left, and the stair section 1505 is on the right. If this elevator is installed on the right side of the outer wall of the unit door opening, the landing door is on the right, the connecting platform 1504 and the landing platform 1506 are set on the right, and the stair section 1505 is on the left.

[0059] When installing a new level-entry elevator system in an old building, the landing door is installed by chiseling a doorway in the wall above the unit entrance. The entrance door 1502 and the entrance door landing platform 1503 remain unchanged. The old building's concrete "folded staircase" railings, handrails, landings, and stair flights are all cut off and replaced with steel structure "straight staircase" railings 1501, connecting platform 1504, stair flights 1505, and landing platform 1506. This achieves a level-entry method with barrier-free access. In actual construction, the elevator is installed first, and then the concrete "folded staircase" is cut off layer by layer from top to bottom or bottom to top and replaced with the steel structure "straight staircase," allowing users to use both the staircase and the elevator for convenient travel.

[0060] See Figure 2The curved sliding door type elevator for old buildings of this utility model is a new type of elevator that uses a traction machine as the driving method. Its specific embodiment includes a steel pit 1, a combined shaft 2, a shaft section 3, a traction machine room 4, a shaft cap 5, a car guide rail, a curved sliding door 7, a curved sliding door type car 8, a landing door, a traction machine 10, a counterweight 11, a steel wire rope 12, a buffer 13, and a control cabinet 14. The combined hoistway 2 is located inside the steel pit 1, and the traction machine room 4 is located on top of the combined hoistway 2. The combined hoistway 2 is composed of multiple hoistway sections 3 vertically combined together. There are two car guide rails, which are vertically fixed to the inner walls on both sides of the combined hoistway 2. The car guide rails are responsible for guiding the car vertically. The curved sliding door car 8 is located inside the combined hoistway 2, between the two car guide rails. The landing door is a curved sliding door landing door 9, which is located on the floor in front of the curved sliding door car 8. The traction machine 10 is located inside the traction machine room 4 and is responsible for traction of the curved sliding door car 8 through the steel wire rope 12. The hoistway cap 5 is located on top of the traction machine room 4. The counterweight 11 is installed on the inner wall of the combined hoistway 2 opposite the landing door opening. It includes a counterweight frame, counterweight guide rails, counterweight guide shoes, counterweight wheels, and counterweight blocks. There are two counterweight guide rails, one on the left and one on the right, fixed symmetrically to the inner wall of the combined hoistway 2 on the side directly opposite the landing door. Symmetrical counterweight guide shoes are installed at the top and bottom of the counterweight frame, respectively. The counterweight guide shoes act as a guide for the counterweight frame to move vertically on the counterweight guide rails. The counterweight 11 is fixed to the two counterweight guide rails by four symmetrical guide shoes and runs vertically. A counterweight anti-roll rope pulley is installed at the top of the counterweight frame, and the counterweight blocks are installed inside the counterweight frame. The function of the counterweight 11 is to balance the weight of the car: by configuring counterweight blocks that match the weight of the car (including rated load), the load on the traction machine 10 during operation is reduced, thus lowering energy consumption. The buffer 13 includes a car buffer and a counterweight buffer. Two car buffers are installed symmetrically on the bottom plate of the steel pit 1, aligned with the left and right car guide rails. Two counterweight buffers are also installed symmetrically on the bottom plate of the steel pit 1, aligned with the left and right counterweight guide rails. The function of buffer 13 is to reduce the impact force on the counterweight 11 when it hits the ground due to car overshoot (car exceeding its high limit position), wire rope 12 derailment, or wire breakage, thereby reducing injury to passengers and equipment. The elevator's wire ropes 12 are generally at least three in parallel. One end is set on the crossbeam of the traction machine room 4, first winding around the car deflector, then around the traction sheave (the wire rope sheave on the traction machine), and finally around the counterweight deflector. The other end of the wire rope 12 is also set on the crossbeam of the traction machine room 4. The control cabinet 14 is installed on the wall near the top floor door and connected to the traction machine 10, used to control the lifting and lowering of the curved sliding door car 8. Car foot guards are installed below the door sill of the curved sliding door car.

[0061] See Figure 3The specific embodiment of the curved sliding door car 8 of this utility model includes a car frame 801, upper guide shoe 802, lower guide shoe 803, safety clamp 804, car anti-rope pulley 805, car door 806, door operator 807, car floor plate 808, and car wall 809. The car frame 801 is a square frame formed by welding square tubes. The car floor plate 808 is located at the bottom of the car frame 801. The car wall 809 is located on the left and right sides, rear side, and top of the car frame 801. The upper guide shoe 802 is divided into two parts, left and right, and is installed on the top sides of the car frame 801 respectively. The lower guide shoe 803 is divided into two parts, left and right, and is installed on the top sides of the car frame 801 respectively. The upper guide shoe 802 and lower guide shoe 803 are both connected to the car guide rails, mounted on both sides of the bottom of the car frame 801. The safety brake 804 consists of two parts, left and right, installed on the top sides of the car frame 801 respectively. The car anti-rope pulley 805 is installed on the crossbeam at the top of the car frame 801 and connected to the traction machine via wire rope. The car door 806 includes left and right door panels, located on the front side of the car frame 801. The car door 806 is a curved sliding door 7. The door operator 807 is located on the top front side of the car frame and is a curved sliding door door operator. The door operator 807 can drive the curved sliding door 7 to open and close to the left and right. The curved sliding door car 8 can be a unit module manufactured in the factory.

[0062] The upper guide shoe 802 and lower guide shoe 803 are fixed guiding devices that fix the car on the car guide rails and move it up and down. The two car guide rails are vertically and symmetrically fixed on the inner walls of both sides of the combined hoistway 2. The safety clamp 804 mainly functions to quickly stop the car and prevent dangerous situations such as falling when the elevator malfunctions (such as runaway speed).

[0063] See Figure 4The door operator 807 of the curved sliding car door of this utility model includes a slider 8070, a door operator fixing plate 8071, a door knife 8072, a door lock 8073, a motor 8074, a door operator controller 8075, a belt 8076, a pulley 8077, a dovetail linear guide rail 8078, a door panel hanging plate 8080, a wire rope pulley 8081, and a ring wire rope 8082. The door operator fixing plate 8071 is mounted on the car frame. On the top front side of 801, the door knife 8072, door lock 8073, motor 8074, door operator controller 8075, belt 8076, pulley 8077, dovetail linear guide 8078, slider 8070, door panel mounting plate 8080, door operator controller 8075, wire rope pulley 8081, and ring wire rope 8082 are all mounted on the door operator fixing plate 8071. Two sliders 8070 are mounted on the dovetail linear guide 8078 (left and right). Door knife 8072 is mounted on the left slider, door lock 8073 is mounted on the right slider, pulley 8077 is mounted on the upper left side of door operator fixing plate 8071, motor 8074 is mounted on the upper right side of door operator fixing plate 8071, door operator controller 8075 is mounted next to motor 8074 and controls motor 8074. The pulleys on pulley 8077 and motor 8074 tension belt 8076 into a ring and drive horizontally. There are two steel wire rope pulleys 8081, left and right, respectively mounted on the lower ends of door operator fixing plate 8071, and tension the ring steel wire rope 8082 to form a ring. The left slider is fixed to one side of belt 8076 and also to the upper side of ring steel wire rope 8082. The right slider is fixed to the lower side of ring steel wire rope 8080. Belt 8076 only drives the left slider, and the left slider drives the right slider to move in the opposite direction through ring steel wire rope 8082. The door operator controller 8075 controls the motor 8074. The door panel mounting plate 8080 is divided into left and right parts, which are connected to the left and right sliders 8070 respectively. The left and right door panels 701 of the curved sliding door are connected to the left and right door panel mounting plates 8080 respectively. The door operator controller 8075 is a driver that drives the motor 8074. When the motor 8074 rotates forward and backward, the belt 8076 will rotate left and right. The belt 8076 drives the left slider and door knife 8072 to move left and right. The right slider and door lock 8072 are fixed to one side of the ring steel wire rope 8080 and will also move left and right in the opposite direction to the movement of the left slider and door knife 8072. This drives the left and right door panels 701 of the curved sliding door to move left and right to realize the opening and closing of the door.

[0064] See Figure 5The specific embodiment of the curved sliding door 7 of this utility model includes left and right door panels 701, an upper curved slide rail 702, a lower curved slide rail 703, door panel profiles 704, an upper pulley assembly 705, and a lower pulley assembly 706. The upper curved slide rail 702 and the lower curved slide rail 703 are formed by bending aluminum alloy profiles with a C-shaped cross-section. The upper curved slide rail 702 is located below the top front side of the car frame 801, and the lower curved slide rail 703 is located above the bottom front side of the car frame 801. The door panel 701 is made of multiple aluminum alloy door panel profiles 704 processed by mechanical processing. The door panels 701 are connected by pivot pins. Each door panel profile 704 is equipped with an upper pulley assembly 705 at the upper end and a lower pulley assembly 706 at the lower end. The upper pulley assembly 705 is connected to the upper curved slide rail 702, and the lower pulley assembly 706 is connected to the lower curved slide rail 703. The curved sliding door 7 achieves straight and curved horizontal sliding on the upper curved slide rail 702 and the lower curved slide rail 703 through the upper pulley assembly 705 and the lower pulley assembly 706 at the upper and lower ends of the door panel profile 704 of the door panel 701. The elevator car door 806 and landing door 903 both adopt the curved sliding door 7.

[0065] See Figure 6 , 7 ,in Figure 7This is a cross-section of the aluminum alloy extruded profile of this utility model. In a specific embodiment of the door panel profile 704 of this utility model, the structure includes a front panel 7047 and a rear panel 7042 arranged in a staggered manner. The front panel 7047 and the rear panel 7042 are connected by a connecting plate. The connecting plate includes a front connecting plate 7045 and a rear connecting plate 7043, which are arranged parallel to each other. A slot 7044 is provided between the front connecting plate 7045 and the rear connecting plate 7043 for connection with an upper pulley assembly 705 and a lower pulley assembly 706. Between the front panel 7047 and the rear panel 7042... The door panel profile 7044 is provided with a front hole 7046 and a rear hole 7049. Both the front hole 7046 and the rear hole 7049 are connected to the front plate 7047 and the rear plate 7042 respectively via vertical spacer 7041 and horizontal spacer 7048. The radial portion of the front hole 7046, including the outer diameter of the hole, is milled with equally spaced concave grooves by a milling machine. The radial portion of the rear hole 7049, including the outer diameter of the hole, is milled with equally spaced convex grooves by a milling machine, so that the concave and convex grooves correspond one-to-one. Multiple door panel profiles 704 are obtained using the same processing method. The concave and convex grooves of the rear hole 7049 of the previous door panel profile 704 are matched one-to-one with the concave and convex grooves of the front hole 7046 of the next door panel profile 704. The hinges are formed by the front hole 7046 and the rear hole 7049 being concentric and sharing a common diameter, through which a long steel pin passes. Multiple door panel profiles 704 are thus connected to form a unidirectionally flexible door panel 701, a type of concealed hinge door. In a straight-line movement trajectory, the front hole 7046 and the rear hole 7049 are concealed by the front panel 7047 and the rear panel 7042, making them invisible. In a curved movement trajectory, the front hole 7046 and the rear hole 7049 are also concentric and sharing a common diameter, through which a long steel pin passes, forming a hinge. Because the two adjacent front panels 7047 of door panel 701 are open, while the two adjacent rear panels 7042 remain close together, the hinge is concealed on the inner curved surface of door panel 701, where the two adjacent rear panels 7042 remain close together. On the outer curved surface of door panel 701, the hinge is exposed between the two adjacent front panels 7047. Although exposed, the outer curved surface of door panel 701 is on the outside of the car wall and the landing door wall, and cannot be seen by people. Whether inside the car or outside the landing door, people cannot see it. This hidden hinge door design is to achieve the aesthetics of the elevator door.

[0066] See Figure 8The structure of the upper pulley assembly 705 of this utility model includes an upper pulley frame 7051, two horizontal pulleys 7052, and two upper vertical pulleys 7053. The two horizontal pulleys 7052 are staggered above the upper pulley frame 7051, and the two upper vertical pulleys 7053 are parallel to each other below the upper pulley frame 7051. The two horizontal pulleys 7052 and the two upper vertical pulleys 7053 are all placed inside the upper curved slide rail 702. The two horizontal pulleys 7052 are placed horizontally to support the horizontal force and guide the inner wall of the upper curved slide rail 702, and the two upper vertical pulleys 7053 are placed vertically to support the door panel profile 704 and guide it. A lower insert plate 7054 that can be inserted into a slot 7044 is provided at the bottom of the upper pulley frame 7051. The upper pulley frame 7051 is fixedly connected to the door panel profile 704 through the lower insert plate 7054 and the slot 7044.

[0067] See Figure 9 The structure of the sliding wheel assembly 706 of this utility model includes a sliding wheel frame 7061 and two lower horizontal pulleys 7062. The two lower horizontal pulleys 7062 are staggered on the sliding wheel frame 7061 and are both placed inside the lower curved slide rail 703. The two lower horizontal pulleys 7062 are placed horizontally to support the horizontal force and guide the inner wall of the lower curved slide rail 703. A lower insert plate 7063 that can be inserted into a slot is provided above the top of the sliding wheel frame 7061. The sliding wheel frame 7061 is fixedly connected to the door panel profile 704 through the lower insert plate 7063 and the slot 7044.

[0068] See Figure 10 The specific embodiment of the curved sliding door 9 of this utility model includes a door frame 901, a door device 902, a door 903, and a door base plate 904. The door frame 901 is a square frame made of square tubes welded together. The door base plate 904 is located at the bottom of the door frame. The left and right sides and the top of the door frame 901 are enclosed with metal plates. There are two doors 903, which are symmetrically arranged on the front side of the door frame 901. The door device 902 is located at the top front side of the door frame 901. The door 903 adopts a curved sliding door 7. During installation, the upper curved slide rail 702 is located below the top front side of the door frame 901, and the lower curved slide rail 703 is located above the bottom front side of the door frame 901. The curved sliding door 9 can be a unit module manufactured in the factory.

[0069] See Figure 11The landing door device 902 of this utility model includes a landing door operator fixing plate 1001, a landing door wire rope wheel 1002, a landing door annular wire rope 1003, a landing door lock 1008, a door ball 1007, a landing door panel hanging plate 1006, a landing door dovetail linear guide rail 1004, and a landing door slider 1005. The landing door wire rope wheel 1002, landing door annular wire rope 1003, landing door lock 1008, door ball 1007, landing door panel hanging plate 1006, landing door dovetail linear guide rail 1004, and landing door slider 1005 are all mounted on the operator fixing plate 1001. The landing door device 902 has the same structure and door panel connection as the curved sliding car door operator 807. Compared with the curved sliding car door operator 807, the landing door device 902 lacks a door knife 8072, a motor 8074, and an operator control mechanism. The specific structure of the device 8075, pulley 8077, and belt 8076 is as follows: the landing door operator fixing plate 1001 is set on the top front side of the landing door frame 901; the landing door dovetail linear guide rail 1004 is equipped with two landing door sliders 1005 on the left and right; the landing door lock 1008 is set on the right slider; there are two landing door wire rope wheels 1002 on the left and right, respectively set at the upper ends of the landing door operator fixing plate 1001, and tensioning the landing door annular wire rope 1003 to form a ring; the upper side of the left landing door slider is fixed to the upper side of the landing door annular wire rope 1003, and the upper side of the right landing door slider is fixed to the lower side of the landing door annular wire rope 1003; the landing door panel hanging plate 1006 is divided into left and right parts, which are connected to the left and right landing door sliders 1005 respectively; the left and right landing doors 903 are connected to the left and right landing door panel hanging plates 1006 respectively. A ball bearing with a rubber sleeve, called a ball bearing 1007, is installed on the landing door lock 1008. Other structures and operating principles are similar. The transmission method of the curved sliding car door operator 807 is a belt 8079 and pulley 8077, with a motor 8074 as the power source driving the wire rope pulley 8079 and the wire rope 8080. The transmission method of the landing door device 902 is the landing door wire rope pulley 1002 and the landing door annular wire rope 1003, without a power source. The power source for the landing door device 902 is the door knife 8072 of the curved sliding car door operator 807, which is linked to the ball bearing 1007 of the landing door device 902. The connection and linkage method between the landing door device 902 and the landing door 903 is the same as the connection and linkage method between the curved sliding car door operator 807 and the car door panel 701.Simultaneously, the door knife 8072 drives the door ball 1007 of the landing door device 902 to achieve the opening and closing of the curved sliding landing door 9. After the curved sliding car 8 reaches the landing, the curved sliding car door 806 and the curved sliding landing door 9 are aligned horizontally. The door ball 1007 of the landing door device 902 will then be engaged in the U-shaped groove of the door knife 8072 of the door operator 807. The door knife 8072 will drive the door ball 1007 to move left and right, while the car door 806 and the landing door 900 of the curved sliding landing door 9 connected to them will also be affected. 3. The door opens and closes by sliding left and right. The door knife 8072 of the door operator 807 and the door ball 1007 of the landing door device 902 move horizontally left and right in a straight line along the dovetail linear guide rail 8078 / 1004. The curved sliding car door 806 and the landing door 903 of the curved sliding door 9, which are connected to the door panel hanging plate 8081 / 1006 of the landing door device 902, move horizontally left and right in a straight line + curve + straight line along the upper curved slide rail 702 and the lower curved slide rail 703 of the curved sliding door.

[0070] The working principle of the curved sliding door drive of this utility model is as follows: After the curved sliding door car 8 reaches the landing, the curved sliding door car door 806 and the curved sliding door landing door 9 are aligned at the same horizontal height. The door ball 1007 of the landing door device 902 will be engaged in the U-shaped groove of the door knife 8072 of the door operator 807. The door knife 8072 will drive the door ball 1007 to move left and right. At the same time, the car door 806 and the landing door 903 of the curved sliding door landing door 9 connected to them slide left and right to realize the opening and closing of the door. The door knife 8072 of the door operator 807 and the door ball 1007 of the landing door device 902 move horizontally left and right in a straight line along the dovetail linear guide rail 8078 / 1004. The curved sliding car door 806 and the landing door 903 of the curved sliding door 9, which are connected to the door panel hanging plate 8081 / 1006 of the door operator 807 and the landing door device 902, move horizontally left and right in a straight line + curve + straight line along the upper curved slide rail 702 and the lower curved slide rail 703 of the curved sliding door.

[0071] See Figure 12 The structure of the combined shaft 2 of this utility model consists of shaft section 3 and encapsulation plate 201. Shaft section 3 is a sturdy square frame assembled on-site in the factory. Encapsulation plate 201 is a metal sheet stamped into an arc-shaped cross section with anti-corrosion surface treatment. One shaft section 3 is placed on each floor. The bottom shaft section 3 is fixed to the steel pit 1, and then the shaft sections 3 are connected layer by layer with bolts to form a shaft. The encapsulation plate 201 is fixed to the encapsulation plate fixing profile 305 on the shaft section column 301 by bolts inside the shaft. The encapsulation plate 201 is installed like a roof tile, with one encapsulation plate 201 pressing down on another encapsulation plate 201 to prevent water from entering the shaft. Encapsulation plates 201 are installed on all four sides of the combined shaft 2 except for the wall-mounted parts.

[0072] See Figure 13 The structure of the shaft section 3 of this utility model includes a column 301, a column connecting block 302, a crossbeam 303, a crossbeam connector 304, and a sealing plate fixing profile 305. The column 301 consists of four isosceles angled steel pipes arranged symmetrically in a square. A crossbeam 303 is provided between the columns 301. The crossbeam 303 is connected to the column 301 by the crossbeam connector 304. The sealing plate fixing profile 305 is fixed to the column 301 by bolts. A column connecting block 302 is provided inside the column 301. The column 301, column connecting block 302, crossbeam 303, and crossbeam connector 304 are all manufactured in the factory and assembled on site into a sturdy square frame. The upper shaft section 3 and the lower shaft section 3 are fastened together by bolts between the column connecting block 302 and the crossbeam 303 to form a combined shaft 2 with an encapsulated plate.

[0073] See Figures 14 to 16The structure of the column connecting block 302 of the shaft section 3 of this utility model includes an upper connecting block and a lower connecting block. Both the upper and lower connecting blocks are isosceles angle steel blocks and match the inner diameter of the column 301 of the isosceles angle steel pipe so that they can be installed inside. The upper and lower connecting blocks are the same size and have the same number of holes, including the same horizontal pin holes 1300. There are four pin holes 1300 in the horizontal direction and three holes in the vertical direction. The difference is that the holes in the upper connecting block are screw holes 1301, while the holes in the lower connecting block are through holes 1302. The four upper connecting blocks are inserted into the four isosceles angled steel pipes of the four columns 301 of the shaft section 3, flush with the inside of the top. Four steel pins pass through the four horizontal pin holes 1300 on the columns 301 and the upper connecting blocks, connecting the upper connecting blocks and the columns 301 as a whole. The four lower connecting blocks are inserted into the four isosceles angled steel pipes of the four columns 301 of the shaft section 3, flush with the inside of the bottom. Four steel pins pass through the four horizontal pin holes 1300 on the columns 301 and the lower connecting blocks, connecting the lower connecting blocks and the columns 301 as a whole. During the assembly of the shaft section 3… First, place the three hex bolts 1304 into the three through holes 1302 of the lower connecting block. The connection method involves stacking the two shaft sections 3 together and aligning them. Use a long hex wrench exceeding the height of the shaft section 3 to tighten the hex bolts 1304 into the screw holes 1301 of the upper connecting block. This will secure the two shaft sections 3 together, completing the assembly of the entire combined shaft 2. In actual installation scenarios, this elevator is installed close to the outer wall of the unit doorway. When the balcony protrudes from the apartment, the outer wall of the unit doorway will form a recess. The elevator shaft will be installed close to a concave corner of the exterior wall. There is no space to use traditional horizontal bolts and welding to connect and secure the two shaft sections 3. The only way to connect and secure the two shaft sections 3 is to use hexagonal bolts 1304 vertically inside the isosceles angle steel pipe of the shaft section 3 column 3. This is an important innovation and will use the world's longest hexagonal wrench (more than 3 meters in length). Otherwise, this elevator will not be able to be installed and used in 50% of the scenarios.

[0074] See Figure 17 The structure of the steel pit 1 of this utility model is composed of a coverless box body welded from steel plates, including a bottom plate 101, bottom mounting holes 102, four walls 103, bottom reinforcing ribs 104, and landing door mounting notches 105. Multiple mounting holes 102 are located at opposite positions on the bottom plate 101 to fix the steel pit 1 to the concrete raft slab. The reinforcing ribs 104 are welded to the inside of the four walls 103. The landing door mounting notches 105 are the installation positions for the elevator landing doors.

[0075] See Figure 18The structure of the traction machine room 4 of this utility model includes a traction machine 10 and a traction machine frame 401. The traction machine frame 401 is a square frame made of square tubes welded together. At the bottom of the traction machine frame 401 is a traction machine mounting chassis 402. The traction machine 10 is mounted on the traction machine mounting chassis 402. The traction sheave on the traction machine 10 is connected to the car anti-rope sheave 805 by a steel wire rope 12. The traction machine frame 401 is fastened to the top of the column 301 of the shaft section 3 at the top of the combined shaft 2 with bolts.

[0076] See Figure 19 The structure of the well cover 5 of this utility model is a metal plate folded into a bottomless box. The top surface of the box has a top reinforcing rib 501 and a top mounting hole 502. The top mounting hole 502 is used to connect with the traction machine room 4. The well cover 5 is fixed to the top of the traction machine room 4 by bolts.

[0077] See Figure 20 This utility model may also include a car mechanical stop device 6, which consists of two parts: a pin hole part, including a rolling insert 602 and a fixing plate 601; and a pin part, including a fixing bracket 605, a pin 603, and a detection switch 604. The pin part is installed on both sides of the top crossbeam of the curved sliding door car 8, adjacent to the upper guide shoe 802. The pin hole part is installed on the car guide rail at the corresponding position of the pin part when the curved sliding door car 8 is in the top floor level position. Specifically, the fixed plate 601 is fixed on the car guide rail, and the rolling socket 602 is set on the fixed plate 601. The rolling socket 602 is a socket composed of upper and lower pulleys. The fixed frame 605 is installed on both sides of the top beam of the curved sliding door car 8, close to the upper guide shoe 802. The pin 603 and the detection switch 604 are both set on the fixed frame 605. The position of the pin 603 corresponds to that of the rolling socket 602. The detection switch 604 is used to detect whether the pin 603 is inserted into the rolling socket 602. When the pin 603 is inserted into the rolling socket 602, the detection switch 604 will be activated and cut off the power supply of the elevator traction machine 10, so that the car stops moving.

[0078] There are two mechanical stop devices for the car, one on the left and one on the right, arranged symmetrically. The function of these mechanical stop devices in machine-room-less elevators is to prevent injury to personnel working on the car top from any movement caused by the car's movement during maintenance on the top floor. They are typically pin-type devices, where a pin is fixed to the car, and a pin hole is fixed to the hoistway. Inserting the pin into the pin hole ensures the car cannot move. Simultaneously, a detection switch, upon detecting the pin insertion, cuts off the elevator's main power supply, thus ensuring safe operation.

[0079] The new standard "Safety Code for Elevator Manufacturing and Installation GB / T7588.1-2020" requires that the mechanical stop device of the car be safe and reliable, ensuring that the pin of the mechanical stop device can be smoothly pulled out of the pin hole to restore the normal movement of the car, allowing professional workers on the car top to leave the shaft through the landing door to ensure safety. Otherwise, a 50 cm × 50 cm escape passage should be opened above the landing door on the top floor. However, due to the limitations of the original building structure, it is difficult to guarantee a 50 cm × 50 cm escape passage space when installing elevators in old buildings. Traditional mechanical stop devices for the car may not be able to ensure that the pin can be pulled out of the pin hole due to the large weight of the car, thus preventing the car from moving normally. Professional workers on the car top will be trapped on the car top and unable to leave the shaft, which is very dangerous. Based on the above reasons, technological innovation is needed to develop a rolling pin with rollers to ensure that the pin of the mechanical stop device can be smoothly inserted into or released from the rolling pin, ensuring the car stops and moves normally, and protecting the safety of professional workers.

[0080] The elevator operation mode of this utility model is the same as that of traditional elevators, both being traction passenger elevators. It was researched and designed in accordance with the standard "Safety Specifications for Elevator Manufacturing and Installation GB / T7588.1-2020".

[0081] The contents of this utility model and the technical contents and necessary elevator components not specifically described in the above embodiments also comply with the "Safety Code for Elevator Manufacturing and Installation GB / T7588.1-2020" standard.

[0082] The above are merely specific embodiments disclosed in this utility model, but the scope of protection disclosed in this utility model is not limited thereto. The scope of protection disclosed in this utility model shall be determined by the scope of protection of the claims.

Claims

1. A novel level-entry device for retrofitting elevators in old buildings with curved sliding door systems, characterized in that: The novel flat-level entrance device for retrofitting elevators in old buildings with curved sliding doors includes a curved sliding door elevator and a flat-level entrance device. The curved sliding door elevator includes a landing door. The flat-level entrance device includes a handrail, an entrance door, an entrance door landing platform, a connecting platform, a stair flight, and a landing platform. The entrance door is located on the entrance door landing platform. The landing door is located outside the landing platform. The entrance door landing platform is connected to the landing platform via the connecting platform. The stair flight is located on the side of the connecting platform. The inner side of the entrance door landing platform of the next floor is connected to the inner side of the landing platform of the previous floor via the stair flight. Handrails are provided on the side of the stair flight and the connecting platform facing away from the wall.

2. The new type of levelling entry device for the curved sliding door type old building retrofitted elevator according to claim 1, characterized in that: The curved sliding door elevator for retrofitting old buildings also includes a steel pit, a combined shaft, a traction machine room, a shaft cover, car guide rails, and a curved sliding door car. The combined shaft is located within the steel pit, and the traction machine room is located at the top of the combined shaft. Two car guide rails are vertically fixed to the inner walls of both sides of the combined shaft. The curved sliding door car is positioned between the two car guide rails. The landing door is a curved sliding door, located on the floor in front of the curved sliding door car. The traction machine in the traction machine room pulls the curved sliding door car via steel cables. The shaft cover is located at the top of the traction machine room. The system includes a car frame, upper guide shoes, lower guide shoes, safety brakes, car deflector pulleys, car doors, door operators, car floor plates, and car walls. The car frame is a square frame constructed from welded square tubing. The car floor plate is located at the bottom of the car frame. The car walls are located on the left, right, rear, and top sides of the car frame. Two upper guide shoes are installed on the top sides of the car frame, and two lower guide shoes are installed on the bottom sides of the car frame. Both upper and lower guide shoes are connected to the car guide rails. Two safety brakes are installed on the top sides of the car frame. The car deflector pulleys are mounted on the crossbeam at the top of the car frame and connected to the traction machine via wire ropes. The car door includes left and right door panels located on the front side of the car frame. The door operator is located at the top front side of the car frame. The door operator is a curved sliding car door operator, comprising a slider, a door operator fixing plate, a door knife, a door lock, a motor, a door operator controller, a belt, a pulley, a dovetail linear guide, a door panel hanging plate, a wire rope pulley, and a ring wire rope. The door operator fixing plate is located at the top front side of the car frame. The door knife, door lock, motor, door operator controller, belt, pulley, dovetail linear guide, slider, door panel hanging plate, wire rope pulley, and ring wire rope are all mounted on the door operator fixing plate. Two sliders, left and right, are mounted on the dovetail linear guide: the door knife is mounted on the left slider, and the door lock is mounted on the right slider. The pulley is... The motor is located on the upper left side of the door operator fixing plate, and the door operator controller is located on the upper right side of the door operator fixing plate. The door operator controller is located next to the motor and controls the motor. The pulley and the pulley on the motor tension the belt into a ring and transmit power in the horizontal direction. There are two steel wire rope pulleys, left and right, respectively located at the lower ends of the door operator fixing plate, and tension the ring steel wire rope to form a ring. The left slider is connected and fixed to one side of the belt and the upper side of the ring steel wire rope, and the right slider is connected and fixed to the lower side of the ring steel wire rope. The door operator controller controls the motor. The door panel hanging plate is divided into left and right pieces, which are connected to the left and right sliders respectively. The left and right door panels are connected to the left and right door panel hanging plates respectively.

3. The new type of flat entry device for the curved sliding door type old building retrofitted elevator according to claim 2, characterized in that: The car door is a curved sliding door, comprising left and right door panels, an upper curved track, and a lower curved track. The upper and lower curved tracks are formed by bending C-shaped aluminum alloy profiles. The upper curved track is located below the top of the front side of the car frame, and the lower curved track is located above the bottom of the front side of the car frame. Each door panel is assembled from multiple door panel profiles, with an upper pulley assembly at the top and a lower pulley assembly at the bottom. The upper pulley assembly connects to the upper curved track, and the lower pulley assembly connects to the lower curved track. Each door panel profile includes a staggered front panel and a rear panel connected by a connecting plate. The connection includes a front connecting plate and a rear connecting plate, which are arranged in parallel. A slot for connecting the upper pulley group and the lower pulley group is provided between the front connecting plate and the rear connecting plate. A front hole and a rear hole are provided between the front plate and the rear plate. The front hole and the rear hole are connected to the front plate and the rear plate respectively by vertical and horizontal partitions. The radial portion of the front hole, including the outer diameter of the hole, is milled with equally spaced concave grooves by a milling machine. The radial portion of the rear hole, including the outer diameter of the hole, is milled with equally spaced convex grooves by a milling machine. The concave and convex grooves of the rear hole of the previous door panel profile and the front hole of the rear door panel profile are engaged one-to-one. The front hole and the rear hole are concentric and share the same diameter, and a long steel pin passes through them to form a hinge structure.

4. The new type of flat entry device for the curved sliding door type old building retrofitted elevator according to claim 3, characterized in that: The upper pulley assembly includes an upper pulley frame, two horizontal pulleys, and two upper vertical pulleys. The two horizontal pulleys are staggered above the upper pulley frame, and the two upper vertical pulleys are parallel to each other below the upper pulley frame. All two horizontal pulleys and two upper vertical pulleys are placed within an upper curved slide rail. A lower insert plate with a slot can be inserted is provided at the bottom of the upper pulley frame. The lower pulley assembly includes a lower pulley frame and two lower horizontal pulleys. The two lower horizontal pulleys are staggered above the lower pulley frame, and both lower horizontal pulleys are placed within a lower curved slide rail. A lower insert plate with a slot can be inserted is provided at the top of the lower pulley frame.

5. The new type of levelling entry device for the curved sliding door type old building retrofitted elevator according to claim 4, characterized in that: The curved sliding landing door includes a landing door frame, a landing door assembly, landing doors, and a landing door base plate. The landing door frame is a square frame welded from square tubing. The landing door base plate is located at the bottom of the landing door frame. The left and right sides and top of the landing door frame are enclosed with metal plates. There are two landing doors, symmetrically arranged on the front side of the landing door frame. The landing door assembly is located at the top of the front side of the landing door frame. The landing door is a curved sliding door. The landing door assembly includes a landing door operator fixing plate, a landing door wire rope pulley, a landing door annular wire rope, a landing door dovetail linear guide rail, a landing door slider, a landing door panel hanging plate, a door ball, and a landing door lock. The landing door operator fixing plate is located at the top of the front side of the landing door frame. The landing door wire rope pulley, landing door annular wire rope, and landing door dovetail... The linear guide rail, landing door slider, landing door panel hanging plate, door ball, and landing door lock are all mounted on the landing door operator fixing plate. The landing door dovetail linear guide rail has two landing door sliders, one on the left and one on the right. The landing door lock is mounted on the right landing door slider, and the door ball is mounted on the landing door lock. There are two landing door wire rope pulleys, one on the left and one on the right, respectively mounted at the upper ends of the landing door operator fixing plate, and they tension the landing door annular wire rope to form a ring. The upper side of the left landing door slider is fixed to the upper side of the landing door annular wire rope, and the upper side of the right landing door slider is fixed to the lower side of the landing door annular wire rope. The landing door panel hanging plate is divided into left and right sections, which are connected to the left and right landing door sliders respectively. The left and right landing doors are connected to the left and right landing door panel hanging plates respectively.

6. The new type of levelling entry device for the curved sliding door type old building retrofitted elevator according to claim 4, characterized in that: The combined shaft includes shaft sections and encapsulation plates. There are multiple shaft sections arranged vertically. The bottom shaft section is set in a steel pit, and the remaining shaft sections are set one per floor. The combined shaft is encapsulated with plates on all four sides except the wall-mounted parts.

7. The new type of levelling entry device for the curved sliding door type old building retrofitted elevator according to claim 6, characterized in that: The shaft section includes a column, a column connecting block, a crossbeam, a crossbeam connector, and a sealing plate fixing profile. The column consists of four isosceles angle steel pipes arranged symmetrically in a square. A crossbeam is installed between the columns, and the crossbeams are connected to the columns via crossbeam connectors. The sealing plate fixing profile is fixed to the inside of the column with bolts. A column connecting block is installed inside the column, and the column connecting block includes an upper connecting block and a lower connecting block. Both the upper and lower connecting blocks are isosceles angle steel blocks of the same size. The upper and lower connecting blocks are respectively embedded at the upper and lower ends of the column. Horizontal pin holes are provided on the sides of both the upper and lower connecting blocks. Both the upper and lower connecting blocks are connected to the column by steel pins passing through the horizontal pin holes. Screw holes are provided in the vertical direction of the upper connecting block, and through holes are provided in the vertical direction at the corresponding positions of the screw holes of the lower connecting block. The through holes are connected to the screw holes by hexagonal bolts. There are multiple encapsulation plates, which are fixed to the encapsulation plate fixing profile on the column by bolts. The encapsulation plates are installed in such a way that one encapsulation plate presses down on the next encapsulation plate.

8. The new type of levelling entry device for the curved sliding door type old building retrofitted elevator according to claim 7, characterized in that: The steel pit includes a bottom plate, bottom mounting holes, four walls, bottom reinforcing ribs, and a door mounting notch. The four walls are set on the bottom plate, the bottom reinforcing ribs are welded inside the four walls, there are multiple bottom mounting holes set on the bottom plate, and a door mounting notch is provided on the upper front side of the four walls.

9. The novel level-entry device for adding elevators to old buildings with curved sliding door systems according to any one of claims 1 to 8, characterized in that: The traction machine room includes a traction machine and a traction machine frame. The traction machine frame is a square frame made of square tubes welded together. A traction machine mounting chassis is set at the bottom of the traction machine frame. The traction machine is set on the traction machine mounting chassis. The traction machine is connected to the car deflector via steel wire ropes. The traction machine frame is fastened to the top of the columns of the shaft section at the top of the combined shaft.

10. The new type of levelling entry device for the curved sliding door type old building retrofitted elevator according to claim 2, characterized in that: The shaft cover is a bottomless box made of metal sheet folded into shape. The top surface of the box has a top reinforcing rib and a top mounting hole. The shaft cover is fixed to the top of the traction machine frame with bolts.

Images