A structure for reconstruction of an old residential building

Abstract

The old cell building reconstruction structure includes an elevator car and a traction system, an elevator shaft opening is formed on a floor wall for the elevator car to pass through, and a closable sealing plate is arranged at the elevator shaft opening; the sealing plate is flat and its free end side bottom is supported by a support strip to maintain a closed state; a pull spring and an L-shaped rod are arranged in the vertical wall of the building, the pull spring is connected with the sealing plate and used for pulling the sealing plate into the vertical wall, one end of the L-shaped rod is a top contact section and is in contact with the support strip, and the other end is a starting section and is located on the running path of the elevator car; a corresponding power wheel matched with the counterweight is arranged at a position below any elevator shaft opening of the vertical wall, and an axle of the power wheel is in transmission connection with a rotating shaft of the sealing plate; the elevator shaft opening is not added with a special sealing elevator shaft inside and outside the floor, and safety accidents are avoided under the premise that the elevator shaft opening is not always open and safety accidents are easily caused; and the opening process of the elevator shaft opening is not prone to safety accidents.

Description

Technical Field

[0001] This invention relates to the field of renovation of old residential buildings, specifically a built-in elevator renovation structure for the renovation of old residential buildings. Background Technology

[0002] Elevator renovation is a key project in the renovation of old residential buildings. In conventional design and construction, enclosed elevator shafts are often set up on the exterior of the building. However, due to the large amount of space occupied and the obstruction of residents' natural light, the construction cost is high, and the residents' acceptance is low, which affects the implementation of renovation projects in old residential buildings.

[0003] To solve this technical problem, patents such as CN201811126525.4 and CN201910469020.6 disclose an elevator modification scheme installed inside a building floor. This scheme uses an automatic control method to open and close the floor cover during the elevator car's up and down movement. On the one hand, the automatic opening and closing of the cover ensures smooth passage of the car and safety of the shaft. On the other hand, it eliminates the need for a closed elevator shaft inside the floor, thus avoiding excessive encroachment on the floor space.

[0004] However, the opening method of the floor cover in the above-mentioned patented technology solutions is similar to that of a push-pull type. That is, during the opening process, the floor cover moves away from the elevator shaft opening and extends completely outside the elevator shaft opening after opening. This may cause it to strike residents passing by outside the elevator shaft opening, which is dangerous. Summary of the Invention

[0005] The present invention aims to provide a structural design for the renovation of old residential buildings, which makes it less likely to cause safety accidents during the opening of elevator shafts without adding dedicated enclosed elevator shafts to the inside and outside of the floors and avoiding the risk of safety accidents caused by constantly open elevator shafts.

[0006] To solve the above technical problems, the specific solution adopted by the present invention is as follows: a renovation structure for old residential buildings, including an elevator car installed inside the building and a traction system located at the top of the building. One end of the steel rope in the traction system is connected to the elevator car, and the other end is connected to a counterweight. An elevator shaft is opened on the floor walls of the building for the elevator car to pass through, and an openable sealing plate is provided at the elevator shaft.

[0007] The sealing plate is a hinged type and its free end bottom is supported by a support bar to maintain a closed state. Part of the support bar extends into the elevator shaft and is used to support the free end of the sealing plate, while the other part extends into the building wall. A tension spring and an L-shaped rod are provided in the vertical wall of the building. The tension spring is connected to the sealing plate and is used to pull the sealing plate into the vertical wall. The inflection point of the L-shaped rod is rotatably connected to the vertical wall and is provided with a torsion spring. One end of the L-shaped rod is the top contact section and touches the support bar to overcome the tension of the tension spring through the torsion spring, thereby maintaining the support of the support bar for the sealing plate. The other end of the L-shaped rod is the starting section and is located on the travel path of the elevator car.

[0008] The vertical wall is also equipped with a corresponding drive wheel located below any elevator shaft opening. The axle of the drive wheel is connected to the rotating shaft of the sealing plate. The wheel body of the drive wheel can engage with the counterweight to drive the drive wheel to rotate during the rise of the counterweight, and further drive the corresponding opened sealing plate to re-close the elevator shaft opening.

[0009] Preferably, the support bar includes a support actuator that directly supports the sealing plate and a support base that is contacted by an L-shaped rod, wherein the end of the support actuator away from the sealing plate is hinged to the middle position of the upper edge of the support base.

[0010] Preferably, the vertical wall is provided with a linear guide for sliding cooperation with the support base.

[0011] Preferably, the starting section includes a starting base fixed to the inflection point and a starting actuator located on the elevator car travel path, with the end of the starting actuator away from the elevator car hinged to the middle position of the upper edge of the starting base.

[0012] Preferably, support strips are provided at both ends of the free end side of the sealing plate. The support strips near the vertical wall are directly connected to the tension spring, while the support strips away from the vertical wall are connected to the tension springs through a structure set in the floor wall. In addition, a compression spring is provided in the floor wall at the position corresponding to the support strip away from the vertical wall to push the corresponding support strip back into the elevator shaft.

[0013] Preferably, two sealing plates are provided in the same elevator shaft opening, and the support strip is used to support the free ends of the two sealing plates at the same time.

[0014] Preferably, the bottom of the free ends of both sealing plates is provided with rollers that roll in conjunction with the top of the elevator car.

[0015] Preferably, the top of the elevator car is provided with an arch, and the top of the arch coincides with the free ends of the two end plates in the vertical direction.

[0016] Preferably, the two sealing plates in the same elevator shaft are respectively provided with a first synchronous gear and a third sprocket on their corresponding rotating shafts. The first synchronous gear is meshed with a second synchronous gear rotatably installed in the wall. The second synchronous gear is coaxially linked with a fourth sprocket, and the fourth sprocket is connected to the third sprocket via a second transmission chain.

[0017] Preferably, a drive gear is connected to the axle of the power wheel via a one-way clutch, and an intermediate gear connected to the drive gear is rotatably provided in the vertical wall. The axle of the intermediate gear is connected to the shaft via a sprocket structure.

[0018] Beneficial effects

[0019] The sealing plate used to seal the elevator shaft in this invention is a hinged type. After opening, the sealing plate remains within the area of ​​the elevator shaft and will not extend excessively beyond the area of ​​the elevator shaft. This avoids unnecessary impact on residents passing by outside the elevator shaft during the opening process of the sealing plate, and further improves the safety of elevator renovation inside the building.

[0020] Compared with the patented technology solutions mentioned in the background art, the sealing plate in this invention can also automatically open and close as the elevator car moves. Furthermore, in this application, the elevator car does not directly cooperate with the sealing plate to push it open during the door opening process. Instead, it cooperates with an L-shaped rod as an actuating element. Then, the L-shaped rod and the tension spring cooperate to pull away the support bar used to support the sealing plate, so that the sealing plate opens automatically under its own weight. This greatly reduces the impact and resistance during the opening of the sealing plate in the elevator car, thereby significantly reducing the swaying of the elevator car and improving the comfort of passengers.

[0021] During the automatic closing process after the sealing plate opens, the elevator car does not directly interact with the sealing plate closing system. Instead, it uses a counterweight and a drive wheel to transmit the torque generated by the drive wheel to the sealing plate, driving it to rotate and close. Because the middle frame is connected to the elevator car by steel cables, the impact transmitted from the counterweight to the elevator car during the interaction between the counterweight and the drive wheel is buffered by the steel cables, further improving passenger comfort.

[0022] Furthermore, the floor cover plates in the patented technologies mentioned in the background section can all be opened by external forces other than the elevator car, potentially leading to accidental opening and compromising safety. In contrast, this invention features a support strip for supporting the cover plate. This support strip automatically retracts when the elevator car descends, releasing the cover plate and providing stable support for the cover plate during normal operating times, preventing it from opening due to accidental external contact. This ensures the elevator shaft opening is properly shielded during normal operating times, significantly improving safety. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0024] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle section;

[0025] Figure 3 for Figure 2 A schematic diagram showing the state of the elevator car after it descends to the L-shaped bar.

[0026] Figure 4 for Figure 1 A schematic diagram showing the state of an elevator car after it has descended through the elevator shaft.

[0027] Figure 5 This is a schematic diagram illustrating the cooperation relationship between the two support bars in Embodiment 2 of the present invention;

[0028] Figure 6 This is a schematic diagram showing the fitting relationship between the two sealing plates in Embodiment 2 of the present invention;

[0029] Figure 7 This is a schematic diagram showing the cooperation relationship between the elevator car and the sealing plate in Embodiment 3 of the present invention;

[0030] Markings in the diagram: 1. Counterweight, 2. First sprocket, 3. Drive gear, 4. Power wheel, 5. Intermediate gear, 6. First transmission chain, 7. Vertical wall, 8. Steel rope, 9. Elevator car, 10. Sealing plate, 11. Floor wall, 12. Elevator shaft, 13. Support bar, 1301. Support actuator, 1302. Support base, 1303. Support hinge pin, 14. First pull rope, 15. Tension spring, 16. Second sprocket, 17. Shaft, 18. 1801 L-shaped rod, 1802 clearance groove, 1803 top contact section, 1804 inflection point, 1805 starting section, 1806 starting base, 1807 starting hinge pin, 1808 starting actuator, 19 torsion spring, 20 fixed pulley, 21 second pull rope, 22 compression spring, 23 arch, 24 roller, 25 third sprocket, 26 second transmission chain, 27 fourth sprocket, 28 second synchronous gear, 29 first synchronous gear. Detailed Implementation

[0031] The technical solution of the present invention will be described below through three embodiments:

[0032] Example 1

[0033] like Figure 1As shown in the figure, this embodiment of a renovation structure for an old residential building is set on a platform at the corner of the building's corridor. It mainly includes an elevator car 9 and a traction system (not shown) located at the top of the building. Similar to traction systems in the prior art, the traction system in this embodiment also includes a drive motor, steel rope 8, etc. One end of the steel rope 8 is connected to the elevator car 9, and the other end is connected to a counterweight 1. The counterweight 1 reduces the traction force required by the drive motor for the elevator car 9. In this embodiment, the counterweight 1 is located outside the vertical wall 7 of the building. Only a protective structure slightly wider than the counterweight 1 is installed outside the vertical wall 7 to prevent it from being exposed. Rails and other mechanisms are used to restrict the counterweight 1 to only move vertically, thus minimizing its occupation of external building space. To facilitate the passage of the elevator car 9 through the horizontally distributed floor walls 11, elevator shaft openings 12 are provided on each floor wall 11 near the vertical wall 7. Under normal conditions, the elevator shaft openings 12 are closed by sealing plates 10, and the sealing plates 10 are linked with the elevator car 9. After the elevator car 9 moves to the elevator shaft opening 12, the corresponding sealing plates 10 are automatically opened and closed to ensure the smooth passage of the elevator car 9 and avoid the safety hazards caused by the elevator shaft openings 12 being constantly open.

[0034] like Figure 2 As shown, in this embodiment, a sealing plate 10 is provided inside the elevator shaft 12. A rotating shaft 17 is provided on one side of the sealing plate 10. The rotating shaft 17 is rotatably engaged with a bearing (not shown in the figure) provided in the wall to realize the opening of the sealing plate 10. When the elevator car 9 does not pass through the elevator shaft 12, the sealing plate 10 inside the elevator shaft 12 is supported by a support bar 13 to maintain a closed state. The support bar 13 includes a support base 1302 that is slidably disposed in the vertical wall 7 in the horizontal direction and a support actuator 1301 hinged to the support base 1302. To ensure that the support base 1302 slides only in the horizontal direction, a linear rail (not shown in the figure) is provided in the vertical wall 7 for the support base 1302 to slide. The right end of the support actuator 1301 is hinged to the support base 1302 by a support hinge pin 1303, and the hinge point is located at the middle position of the upper edge of the support base 1302, thereby... Figure 2 In the indicated state, the left end of the support actuator 1301 cannot rotate counterclockwise around the support hinge pin 1303, and is located below the free end of the sealing plate 10 opposite to the side where its own pivot 17 is located, thus supporting the sealing plate 10. A small torsion spring is also provided on the support hinge pin 1303, which controls the support actuator 1301 to return to its original position after the external force disappears. Figure 2 The initial state shown is sufficient.

[0035] Figure 2In the vertical wall 7, a tension spring 15 is also provided on the right side of the support bar 13. The tension spring 15 is fixedly connected to the support base 1302 by a first pull rope 14, and can pull the entire support bar 13 to the right, so that the support actuator 1301 is completely separated from the sealing plate 10, thereby causing the sealing plate 10 to rotate downward under the action of gravity, so that the elevator shaft opening 12 is opened. In order to control the position of the support bar 13 and make it linked with the elevator car 9, the sealing plate 10 is opened only when the elevator car 9 falls close to the elevator shaft opening 12. In this embodiment, an L-shaped rod 18 is also provided in the vertical wall 7 as an actuating element. Figure 2 The L-shaped rod 18 includes a horizontally distributed starting section 1804 fixed at the inflection point 1803 and a vertically distributed top contact section 1802 also fixed at the inflection point 1803. The inflection point 1803 is rotatably connected to the vertical wall 7 and a torsion spring 19 is provided between it and the inner wall of the vertical wall 7. The lower end of the top contact section 1802 has a relief groove 1801 for the first pull rope 14 to pass through and connect to the support base 1302. The bottom left side of the top contact section 1802 abuts against the right end of the support base 1302, thereby overcoming the tension of the tension spring 15 through the rebound force of the torsion spring 19, and maintaining the support bar 13 in a certain position. Figure 2 The state is shown. The starting section 1804 has a starting base 1805 fixedly connected to the inflection point 1803 and a starting actuator 1807 hinged to the starting base 1805 near the center position via a starting hinge pin 1806. The starting hinge pin 1806 also has a small torsion spring to maintain the starting actuator 1807 in its initial state after the external force is removed. The starting actuator 1807 is located on the vertical movement trajectory of the elevator car 9, but the starting base 1805 is not located on the vertical movement trajectory of the elevator car 9. The aforementioned hinged connection between the starting actuator 1807 and the starting base 1805 allows the starting actuator 1807 to rotate only clockwise around the starting hinge pin 1806, and not counterclockwise.

[0036] Based on the above mechanism, the state of the sealing plate 10 inside the elevator shaft opening 12 during the descent and ascent of the elevator car 9 is described respectively:

[0037] During the descent of elevator car 9:

[0038] exist Figure 1 and Figure 2 In the state shown, when the elevator car 9 descends, the bottom of the elevator car 9 will touch the starting actuator 1807, and the starting actuator 1807 will drive the entire L-shaped rod 18 to rotate around the inflection point 1803. Figure 3The state shown is as follows. At this time, the top contact section 1802 of the L-shaped rod 18 clears the rightward travel path of the right end of the support bar 13. The support bar 13 then moves to the right under the tension of the tension spring 15, releasing the support for the sealing plate 10. The sealing plate 10 then rotates on its own to open the elevator shaft opening 12, and the elevator car 9 continues to fall through the wall 11 of that floor. After the elevator car 9 completely disengages from the starting section 1804 of the L-shaped rod 18, the L-shaped rod 18, under the action of the torsion spring 19, returns to its original position and rotates around the inflection point 1803. Figure 2 In the state shown, its top contact segment 1802 pushes the support bar 13 again to overcome the tension of the tension spring 15 and move to the left to the reset state.

[0039] After the elevator car 9 passes through the floor wall 11, in order to allow the sealing plate 10 to close again to achieve the protective function, combined with Figure 1 and Figure 2 As shown, a drive wheel 4 is provided on the right side of the vertical wall 7. A drive gear 3 is mounted on the axle of the drive wheel 4. An intermediate gear 5, meshing with the drive wheel, is rotatably mounted in the vertical wall 7. The intermediate gear 5 is concentrically linked with a first sprocket 2. The first sprocket 2 is then connected via a first transmission chain 6 to a second sprocket 16 mounted on the rotating shaft 17 of the sealing plate 10. With this structure, as shown... Figure 4 As shown, during the descent of the elevator car 9 after passing through the elevator shaft 12, the counterweight 1 moves vertically upward under the tension of the steel cable 8. During its ascent, the counterweight 1 contacts the wheel of the drive wheel 4 and, through friction, drives the axle of the drive wheel 4 to rotate. This causes the torque to be transmitted sequentially through the drive gear 3, intermediate gear 5, first sprocket 2, first transmission chain 6, and second transmission chain 26 to the rotating shaft 17. The rotating shaft 17 then drives the sealing plate 10 to rotate upward around the shaft 17 until it is reset. The outer diameter of the drive gear 3 is smaller than that of the drive wheel 4, and the diameter of the first sprocket 2 is smaller than that of the intermediate gear 5. This combination achieves the function of reducing speed and increasing torque, facilitating the smooth reset of the sealing plate 10.

[0040] During the specific reset process of the sealing plate 10, when the sealing plate 10 rotates and rises to the support bar 13, it can move the support actuator 1301 to rotate clockwise around the support hinge pin 1303. After the sealing plate 10 passes the left end of the support actuator 1301, the support actuator 1301 resets under the action of gravity and its own small torsion spring. At this time, the lower left end of the counterweight 1 disengages from the power wheel 4, the friction driving the power wheel 4 to rotate disappears, and the sealing plate 10 rotates downward again, and its free end falls back onto the support actuator 1301, so that this embodiment achieves the reset state again. Figure 2 The initial state is shown.

[0041] The aforementioned drive gear 3 and drive wheel 4 are connected by a one-way clutch (not shown in the figure), which is common in the prior art. The one-way clutch allows the drive wheel 4 to drive the drive gear 3 to rotate synchronously only when the elevator car 9 is descending and the counterweight 1 is ascending, and the drive wheel 4 is driven by the counterweight 1 to rotate counterclockwise. When the elevator car 9 is ascending and the counterweight 1 is descending, and the drive wheel 4 is driven by the counterweight 1 to rotate clockwise, the torque transmission between the drive wheel 4 and the drive gear 3 is separated, and the drive gear 3 does not rotate at the same time. This avoids mechanical damage caused by the continuous downward rotation of the sealing plate 10 supported by the support bar 13 during the upward movement of the elevator car 9 due to the cooperation between the counterweight 1 and the drive wheel 4.

[0042] During the ascent of elevator car 9:

[0043] When the elevator car 9 ascends and passes through the elevator shaft 12, because the support actuator 1301 is located outside the travel path of the elevator car 9, the elevator car 9 does not change the state of the support bar 13. This allows the elevator car 9 to directly contact the bottom of the sealing plate 10 after passing the support bar 13, opening the sealing plate 10 upwards and allowing the elevator car 9 to pass through the elevator shaft 12. Because the starting actuator 1807 is located within the path of the elevator car 9, it causes the elevator car 9 to push the starting actuator 1807 upwards to rotate, without causing the L-shaped rod 18 to rotate as a whole. After the elevator car 9 passes through the elevator shaft 12 and the starting actuator 1807, the starting actuator 1807 and the sealing plate 10 respectively return to their original positions. To facilitate the resetting of the sealing plate 10, a torsion spring (not shown in the figure) is provided between its pivot 17 and the wall for resetting.

[0044] Example 2

[0045] This embodiment is a further improvement on embodiment 1. The difference from embodiment 1 is that by setting two sealing plates 10 that open relatively flat, the size of a single sealing plate 10 is reduced. By setting support bars 13 at both ends of the free end side of the support bar 13, the structural stability of the sealing plate 10 closing the elevator shaft opening 12 is ensured. Specifically:

[0046] like Figure 6 As shown, each of the two sealing plates 10 has a rotating shaft 17. A second sprocket 16 is mounted on the left rotating shaft 17 and connected to the power wheel 4 system via a first transmission chain 6. To achieve synchronous opening and closing of the two sealing plates 10, a third sprocket 25 is also provided at the other end of the left rotating shaft 17. The third sprocket 25 is connected to a fourth sprocket 27 rotatably mounted in the wall via a second transmission chain 26. The fourth sprocket 27 is located near the right rotating shaft 17 and is concentrically fixedly connected to a second synchronous gear 28, which meshes with a first synchronous gear 29 mounted on the right rotating shaft 17.

[0047] With the above structure, when the elevator descends past the elevator shaft opening 12 and the counterweight 1 ascends, the rotation of the power wheel 4 generates torque, causing the left sealing plate 10 to rotate upwards. The left rotating shaft 17 drives the second synchronous gear 28 to rotate via the second transmission chain 26. The second synchronous gear 28 and the first synchronous gear 29 cooperate to drive the right rotating shaft 17 to rotate, thereby realizing that the two sealing plates 10 rotate synchronously in opposite directions and rise synchronously at the same speed to reset.

[0048] like Figure 5 As shown, support bars 13 are provided at both ends of the free ends of the two sealing plates 10 at the elevator shaft opening 12. The right support bar 13 is connected to a spring via a first pull rope 14, and the support bar 13 is connected to four fixed pulleys 20 and tension springs 15 installed in the floor wall 11 via a second pull rope 21. When the elevator descends, the L-shaped rod 18 rotates, causing its top contact section 1802 to disengage from the right end of the right support bar 13. The tension spring 15 then pulls the right support bar 13 to the right away from the elevator shaft opening 12 via the first pull rope 14, and simultaneously pulls the left support bar 13 to the left away from the elevator shaft opening 12 via the second pull rope 21. This causes the two sealing plates 10 to lose support, rotate and fall, and open the elevator shaft opening 12. Unlike the right support bar 13 which is reset by the top contact section 1802 of the L-shaped rod 18, in this embodiment, a compression spring 22 is provided on the left side of the left support bar 13 in the floor wall 11 where the left support bar 13 is located. During the reset process of the right support bar 13 pushed by the torsion spring 19, the left support bar 13 is also automatically reset under the pushing force of the compression spring 22.

[0049] Example 3

[0050] This embodiment is a further improvement on embodiment 2, and the difference from embodiment 2 is as follows: Figure 7 As shown, rollers 24 are provided at the bottom of the free ends of both sealing plates 10, while the top of the elevator car 9 is provided with an arch 23 with an isosceles triangular cross-section. The interior of the arch 23 is hollow to reduce the load, and the projection of the top in the vertical direction is located between the two rollers 24. During the ascent of the elevator car 9, the arch 23 contacts the two rollers 24, and the rolling cooperation between the rollers 24 and the inclined surface of the arch 23 reduces the friction between the arch 23 and the sealing plates 10. This reduces the resistance received by the elevator car 9 when it moves upward and opens the sealing plates 10, which helps to reduce the vibration of the elevator car 9 and improve the comfort of the people inside the elevator car 9.

Claims

1. A renovation structure for an old residential building, comprising an elevator car (9) installed inside the building and a traction system located at the top of the building, wherein one end of a steel cable (8) in the traction system is connected to the elevator car (9), and the other end is connected to a counterweight (1), an elevator shaft opening (12) is provided on the floor wall (11) of the building for the elevator car (9) to pass through, and an openable sealing plate (10) is provided at the elevator shaft opening (12), characterized in that: The sealing plate (10) is a hinged type and is supported by a support bar (13) to maintain its closed state. Part of the support bar (13) extends into the elevator shaft opening (12) and is used to support the free end of the sealing plate (10), while the other part extends into the building wall. A tension spring (15) and an L-shaped rod (18) are provided in the vertical wall (7) of the building. The tension spring (15) is connected to the support bar (13) and is used to pull the support bar (13) into the vertical wall (7). Inside, the inflection point (1803) of the L-shaped rod (18) is rotatably connected to the vertical wall (7) and is provided with a torsion spring (19). One end of the L-shaped rod (18) is the top contact section (1802) and touches the support bar (13) so as to overcome the tension of the tension spring (15) through the torsion spring (19), thereby maintaining the support of the support bar (13) on the sealing plate (10). The other end of the L-shaped rod (18) is the starting section (1804) and is located on the travel path of the elevator car (9). The vertical wall (7) is located below any elevator shaft opening (12) and is equipped with a corresponding power wheel (4). The axle of the power wheel (4) is connected to the shaft (17) of the sealing plate (10). The wheel body of the power wheel (4) can be frictionally engaged with the counterweight (1) so that the power wheel (4) can be driven to rotate during the rise of the counterweight (1) and further drive the corresponding opened sealing plate (10) to re-close the elevator shaft opening (12).

2. The renovation structure for old residential buildings as described in claim 1, characterized in that: The support bar (13) includes a support actuator (1301) that directly supports the sealing plate (10) and a support base (1302) that is abutted by the L-shaped rod (18). The end of the support actuator (1301) away from the sealing plate (10) is hinged to the middle position of the upper edge of the support base (1302).

3. The renovation structure for old residential buildings as described in claim 2, characterized in that: The vertical wall (7) is provided with a linear guide for sliding cooperation with the support base (1302).

4. The renovation structure for old residential buildings as described in claim 1, characterized in that: The starting section (1804) includes a starting base (1805) fixed to the inflection point (1803) and a starting actuator (1807) located on the travel path of the elevator car (9). The end of the starting actuator (1807) away from the elevator car (9) is hinged to the middle position of the upper edge of the starting base (1805).

5. The renovation structure for old residential buildings as described in claim 1, characterized in that: Support bars (13) are provided at both ends of the free end of the sealing plate (10). The support bar (13) close to the vertical wall (7) is directly connected to the tension spring (15), and the support bar (13) away from the vertical wall (7) is connected to the tension spring (15) through a pull line set in the floor wall (11). In addition, a compression spring (22) is provided in the floor wall (11) at the position corresponding to the support bar (13) away from the vertical wall (7) to push the corresponding support bar (13) to extend into the elevator shaft (12) again.

6. The renovation structure for old residential buildings as described in claim 1, characterized in that: Two sealing plates (10) are provided in the same elevator shaft opening (12), and the support bar (13) is used to support the free ends of the two sealing plates (10) at the same time.

7. The renovation structure for old residential buildings as described in claim 6, characterized in that: Both end plates (10) are equipped with rollers (24) at the bottom of their free ends that roll in conjunction with the top of the elevator car (9).

8. The renovation structure for old residential buildings as described in claim 6, characterized in that: The top of the elevator car (9) is provided with an arch (23), and the top of the arch (23) coincides with the free end sides of the two end plates (10) in the vertical direction.

9. The renovation structure for old residential buildings as described in claim 6, characterized in that: The first synchronous gear (29) and the third sprocket (25) are respectively provided on the rotating shaft (17) corresponding to the two sealing plates (10) in the same elevator shaft (12). The first synchronous gear (29) is meshed with the second synchronous gear (28) rotatably installed in the wall. The second synchronous gear (28) is coaxially linked with the fourth sprocket (27), and the fourth sprocket (27) is connected to the third sprocket (25) via the second transmission chain (26).

10. The renovation structure for old residential buildings as described in claim 1, characterized in that: The drive wheel (4) is connected to the drive gear (3) via a one-way clutch. The vertical wall (7) is provided with an intermediate gear (5) connected to the drive gear (3). The axle of the intermediate gear (5) is connected to the rotating shaft (17) via a sprocket structure.

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