Platform device for elevator installation without scaffolding

Abstract

The present application provides a kind of platform device of elevator scaffold-free installation, comprising: installation frame and platform car, the platform car is slidably connected on installation frame, the installation frame is arranged on structural member, and first connecting rod and second connecting rod are respectively hinged on the installation frame and platform car, the first connecting rod and the second connecting rod are hinged with each other, and the platform car is further provided with stabilizing device.The present application can effectively improve the stability of the passenger when working in the platform car by setting first connecting rod and second connecting rod and stabilizing device, without causing excessive shaking, and the stabilizing device can effectively reduce the stress of first connecting rod and second connecting rod, improve the safety of the whole device.

Description

Technical Field

[0001] This invention relates to the field of elevator equipment installation technology, and in particular to a platform device for elevator installation without scaffolding. Background Technology

[0002] During elevator installation, operations such as placing the elevator counterweight need to be performed at the top floor of the building shaft. Currently, the conventional installation method is to build scaffolding from the ground floor to the top floor, with construction workers standing on the scaffolding to carry out the work. This traditional method of using scaffolding for installation is complicated, time-consuming, and labor-intensive.

[0003] The invention with authorization number "CN 214364846 U" discloses a platform device suitable for the installation of machine room-less elevators without scaffolding. In this document, only a movable swing arm consisting of a short rod and a long rod connected by pins is provided. When a person enters the platform bracket, the swing arm may break or bend due to shaking or excessive weight. Summary of the Invention

[0004] The present invention provides a platform device for elevator installation without scaffolding, in order to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention discloses a platform device for elevator installation without scaffolding, comprising: an installation frame and a platform car, the platform car being slidably connected to the installation frame, and a first connecting rod and a second connecting rod being respectively hinged to the installation frame and the platform car, the first connecting rod and the second connecting rod being hinged to each other, and a stabilizing device being provided on the platform car.

[0006] Preferably, the mounting frame includes: a crossbeam and two L-shaped beams. The crossbeam is fixedly mounted on the wall. The upper ends of the vertical sections of the two L-shaped beams are symmetrically fixedly mounted on the lower surface of the crossbeam. The lower ends of the L-shaped beams are fixedly connected to the ground. The upper surface of the horizontal section of the L-shaped beams is slidably connected to the platform car. The vertical section of the L-shaped beams is provided with a plurality of first limiting holes.

[0007] Preferably, the platform car includes: a base plate, several protective plates and a protective box. The base plate is slidably disposed on the upper surface of the horizontal section of the L-shaped beam. The protective plates are fixedly disposed on the base plate in the vertical direction. The protective box is fixedly disposed at the rear end of the base plate. The protective box and the protective plates are arranged in parallel. Several second limiting holes are also provided on both sides of the base plate. The platform car can slide into the elevator shaft.

[0008] Preferably, one end of the first connecting rod is hinged in the first limiting hole, the other end of the first connecting rod is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged in the second limiting hole.

[0009] Preferably, the stabilizing device is installed inside the protective box. The stabilizing device includes: a first motor, which is fixedly mounted on the inner wall of the front side of the protective box. The upper end of the first motor is fixedly connected to a first threaded rod through an output shaft. The other end of the first threaded rod is rotatably connected to the inner wall of the upper side of the protective box. A first moving block is threadedly connected to the first threaded rod.

[0010] A guide rod, the lower end of which is fixedly connected to the first motor, and the upper end of which is fixedly connected to the inner wall of the upper side of the protective box. The guide rod passes through the first moving block and is slidably connected to the position through which the first moving block passes.

[0011] A moving rod is fixedly connected to the rear side of the first moving block. A first rack is fixedly connected to the lower end of the moving rod. Half gears are meshed on the left and right sides of the first rack. An eighth link is fixedly connected to the end of the half gear away from the first rack. A ninth link is fixedly connected to the end of the eighth link away from the first rack. A third link is fixedly connected to the end of the ninth link away from the first rack. The third link is hinged to the inner rear wall of the protective box and is parallel to the eighth link. A fourth link is fixedly connected to the end of the third link away from the first rack. The fourth link extends out of the protective box and is slidably connected to the left and right side walls of the protective box. A protective plate is hinged to the end of the fourth link away from the third link. The protective plate can contact and cooperate with the left and right side walls of the elevator shaft.

[0012] Preferably, a first bevel gear is also fixedly provided on the first threaded rod, and a second bevel gear is meshed with the rear side of the first bevel gear. A second threaded rod is fixedly connected to the rear side of the second bevel gear. The second threaded rod extends out of the protective box and is rotatably connected to the rear inner wall of the protective box. The rear end of the second threaded rod extends into the first suction cup. The rear end of the second threaded rod is threadedly connected to a second moving block. The second moving block is slidably connected to the inner wall of the first suction cup. The first suction cup can contact and cooperate with the rear wall of the elevator shaft.

[0013] Preferably, the stabilizing device further includes: a suction mechanism, the suction mechanism comprising: two symmetrical ropes, one end of each rope being fixedly connected to a first rack;

[0014] The first and second fixed pulleys are both located on the inner rear wall of the protective box. The rope is in contact with the first and second fixed pulleys. The rear wall of the protective box has symmetrical first openings on both sides. The rope extends out of the protective box from the first openings, and the other end of the rope extends into the second suction cup. The other end of the rope is fixedly connected to a third moving block. The third moving block is slidably connected to the inner wall of the second suction cup. The second suction cup can contact the rear wall of the elevator shaft. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 For the present invention Figure 1 Side view;

[0018] Figure 3 This is a schematic diagram of the stabilization device structure of the present invention;

[0019] Figure 4 For the present invention Figure 3 Side view of the middle section structure;

[0020] Figure 5 This is a schematic diagram of the suction mechanism of the present invention;

[0021] Figure 6 This is a schematic diagram of the suction cup structure of the present invention;

[0022] Figure 7 This is a schematic diagram of the buffer device structure of the present invention;

[0023] Figure 8 For the present invention Figure 7 Enlarged view of point A;

[0024] Figure 9 This is a top view of the second gear in the present invention;

[0025] Figure 10 For the present invention Figure 7 Enlarged view of point B

[0026] In the diagram: 1. Mounting frame; 1a. Crossbeam; 1b. L-shaped beam; 2. First limiting hole; 3. First connecting rod; 4. Base plate; 5. Second connecting rod; 6. Second limiting hole; 7. Protective box; 8. Platform car; 9. Protective plate; 10. Elevator shaft; 11. Wall; 12. Ground; 13. Stabilizing device; 14. Protective plate; 15. Fourth connecting rod; 16. Third connecting rod; 17. Ninth connecting rod; 18. Eighth connecting rod; 19. First rack; 20. Half gear; 21. Moving rod; 22. First motor; 23. Guide rod; 24. First moving block; 25. First bevel gear; 26. Second bevel gear; 27. First threaded rod; 28. Second threaded rod; 29. ​​Second moving block; 30. First suction cup; 31. Rope; 32. First fixed... 33. Second fixed pulley; 34. Third moving block; 35. Second suction cup; 36. Suction mechanism; 37. Buffer device; 38. Mounting box; 39. Buffer plate; 40. Second rack; 41. First gear; 42a. First connecting plate; 42b. Second connecting plate; 43. Sixth connecting rod; 44. Bolt; 45. Drive rod; 46. Spring plate; 47. Fifth connecting rod; 48. Seventh connecting rod; 49. Rectangular frame; 50. Limiting rod; 51. Second gear; 52. First spring; 53. Fixed block; 54. Limiting box; 55. Extending rod; 56. Connecting rod; 57. Second moving plate; 58. First moving plate; 59. Baffle; 60. Second spring; 61. Third rack; 62. Third gear; 63. Second motor. Detailed Implementation

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0029] Example 1

[0030] Embodiments of the present invention provide a platform device for elevator installation without scaffolding, such as... Figure 1-2As shown, it includes: a mounting frame 1 and a platform car 8. The platform car 8 is slidably connected to the mounting frame 1, and a first connecting rod 3 and a second connecting rod 5 are respectively hinged to the mounting frame 1 and the platform car 8. The first connecting rod 3 and the second connecting rod 5 are hinged to each other, and the platform car 8 is also provided with a stabilizing device 13.

[0031] The working principle and beneficial effects of the above technical solution are as follows: The platform car 8 slides on the mounting frame 1. When the platform car 8 slides to the working position, the first connecting rod 3, the second connecting rod 5 and the stabilizing device 13 pull the platform car 8 and stabilize it. By setting the first connecting rod 3, the second connecting rod 5 and the stabilizing device 13, the stability of the passengers working in the platform car can be effectively improved, and excessive shaking will not be caused. In addition, the stabilizing device can effectively reduce the force on the first connecting rod 3 and the second connecting rod 5, improve the safety of the entire device, and effectively alleviate the possible bending and breakage of the connecting rods due to excessive weight in the car.

[0032] Example 2

[0033] Based on the above embodiment 1, as follows Figure 1-2 As shown, the mounting frame 1 includes a crossbeam 1a and two L-shaped beams 1b. The crossbeam 1a is fixedly mounted on the wall 11. The upper ends of the vertical sections of the two L-shaped beams 1b are symmetrically fixedly mounted on the lower surface of the crossbeam 1a. The lower ends of the L-shaped beams 1b are fixedly connected to the ground 12. The upper surface of the horizontal section of the L-shaped beams 1b is slidably connected to the platform car 8. The vertical section of the L-shaped beams 1b is provided with a plurality of first limiting holes 2.

[0034] Preferably, the platform car 8 includes: a base plate 4, several protective plates 9 and a protective box 7. The base plate 4 is slidably disposed on the upper surface of the horizontal section of the L-shaped beam 1b. The protective plates 9 are fixedly disposed on the base plate 4 in the vertical direction. The protective box 7 is fixedly disposed at the rear end of the base plate 4. The protective box 7 and the protective plates 9 are arranged in parallel. Several second limiting holes 6 are also provided on both sides of the base plate 4. The platform car 8 can slide into the elevator shaft 10.

[0035] Preferably, one end of the first connecting rod 3 is hinged in the first limiting hole 2, the other end of the first connecting rod 3 is hinged to one end of the second connecting rod 5, and the other end of the second connecting rod 5 is hinged in the second limiting hole 6.

[0036] The working principle of the above technical solution is as follows: the crossbeam 1a is fixedly installed on the wall 11, the lower end of the L-shaped beam 1b is fixedly connected to the ground 12, the first connecting rod 3 and the second connecting rod 5 are hinged together, and then respectively hinged into the first limiting hole 2 and the second limiting hole 6. After that, when work is required, personnel enter the platform car 8, the protective plate 9 protects the personnel, and the platform car 8 is slid into the elevator shaft 10. The stabilizing device in the protective box 7 works in real time.

[0037] The beneficial effects of the above technical solution are as follows: by setting a number of first limiting holes 2 and second limiting holes 6, when installation is required, the staff can freely choose which hole to hinge the connecting rod to, and by hinged to different holes, the force is more evenly distributed; by setting the protective box 7 and the protective plate 9, the staff inside the platform car 8 can be effectively protected, and the platform car 8 is also more stable with very little shaking.

[0038] Example 3

[0039] Based on the above embodiments 1-2, such as Figure 3-6 As shown, the stabilizing device 13 is installed inside the protective box 7. The stabilizing device 13 includes: a first motor 22, which is fixedly mounted on the inner wall of the front side of the protective box 7. The upper end of the first motor 22 is fixedly connected to a first threaded rod 27 through an output shaft. The other end of the first threaded rod 27 is rotatably connected to the inner wall of the upper side of the protective box 7. A first moving block 24 is threadedly connected to the first threaded rod 27.

[0040] Guide rod 23, the lower end of which is fixedly connected to the first motor 22, the upper end of which is fixedly connected to the upper inner wall of the protective box 7, and the guide rod 23 passes through the first moving block 24 and is slidably connected to the first moving block 24 at the through position;

[0041] A moving rod 21 is fixedly connected to the rear side of the first moving block 24. The lower end of the moving rod 21 is fixedly connected to the first rack 19. Half gears 20 are meshed on the left and right sides of the first rack 19. The end of the half gear 20 away from the first rack 19 is fixedly connected to the eighth link 18. The end of the eighth link 18 away from the first rack 19 is fixedly connected to the ninth link 17. The end of the ninth link 17 away from the first rack 19 is fixedly connected to the third link 16. The third link 16 is hinged to the rear inner wall of the protective box 7 and is arranged parallel to the eighth link 18. The end of the third link 16 away from the first rack 19 is fixedly connected to the fourth link 15. The fourth link 15 extends out of the protective box 7 and is slidably connected to the side wall of the protective box 7. A protective plate 14 is hinged to the end of the fourth link 15 away from the third link 16. The protective plate 14 can contact and cooperate with the left and right walls of the elevator shaft 10.

[0042] The working principle of the above technical solution is as follows: the first motor 22 is started, the first threaded rod 27 begins to rotate, the first moving block 24 slides down on the guide rod 23, driving the moving rod 21 to move down, the first rack 19 moves down at the same time, driving the half gear 20 to deflect towards the left and right walls of the elevator shaft 10, driving the eighth link 18, the ninth link 17 and the third link 16 to deflect towards the left and right walls of the elevator shaft 10, the fourth link 15 extends outward, and the protective plate 14 abuts against the left and right walls of the elevator shaft 10.

[0043] The beneficial effects of the above technical solution are as follows: by setting the threaded connection between the first moving block 24 and the first threaded rod 27, the sliding of the first moving block 24 on the guide rod 23 is more stable; by setting the protective plate 14, the shaking of the platform car 8 can be effectively reduced; and because the first moving block 24 and the first threaded rod 27 are threadedly connected, the half gear 20 cannot drive the first rack 19 to move upward, and the protective plate 14 will not leave the left and right side walls of the elevator shaft 10 due to shaking, thus effectively improving the stability and safety of the device.

[0044] Example 4

[0045] Based on the above embodiments 1-3, such as Figure 3-6 As shown, a first bevel gear 25 is also fixedly provided on the first threaded rod 27. The rear side of the first bevel gear 25 is meshed with a second bevel gear 26. The rear side of the second bevel gear 26 is fixedly connected to a second threaded rod 28. The second threaded rod 28 extends out of the protective box 7 and is rotatably connected to the rear inner wall of the protective box 7. The rear end of the second threaded rod 28 extends into the first suction cup 30. The rear end of the second threaded rod 28 is threadedly connected to a second moving block 29. The second moving block 29 is slidably connected to the inner wall of the first suction cup 30. The first suction cup 30 can contact and cooperate with the rear wall of the elevator shaft 10.

[0046] The working principle of the above technical solution is as follows: the first threaded rod 27 starts to rotate, which drives the first bevel gear 25 to rotate, which drives the second bevel gear 26 meshing with it to start to rotate, which drives the second threaded rod 28 to rotate, which drives the second moving block 29 to move within the first suction cup 30, so that the first suction cup 30 sticks tightly to the rear wall of the elevator shaft 10.

[0047] The beneficial effects of the above technical solution are as follows: by setting the first suction cup 30, the stability of the platform car 8 can be effectively improved, making it difficult for the platform car 8 to swing, thus effectively improving the safety of the device.

[0048] Example 5

[0049] Based on the above embodiments 1-4, such as Figure 3-6As shown, the stabilizing device 13 further includes a suction mechanism 36, which includes two symmetrical ropes 31, one end of which is fixedly connected to the first rack 19.

[0050] The first fixed pulley 32 and the second fixed pulley 33 are both disposed on the inner rear wall of the protective box 7. The rope 31 is in contact with the first fixed pulley 32 and the second fixed pulley 33. The rear wall of the protective box 7 has symmetrical first openings on the left and right sides. The rope 31 extends out of the protective box 7 from the first openings, and the other end of the rope 31 extends into the second suction cup 35. The other end of the rope 31 is fixedly connected to the third moving block 34. The third moving block 34 is slidably connected to the inner wall of the second suction cup 35. The second suction cup 35 can contact the rear wall of the elevator shaft 10.

[0051] The working principle of the above technical solution is as follows: when the first rack 19 moves downward, it pulls the rope 31. The rope 31 passes through the first fixed pulley 32 and the second fixed pulley 33, which pulls the third moving block 34 to move within the second suction cup 35, so that the second suction cup 35 adheres tightly to the rear wall of the elevator shaft 10.

[0052] The beneficial effects of the above technical solution are as follows: by setting the second suction cup 35, the stability of the platform car 8 is effectively improved, and the rope 31 is fixedly set on the first rack 19. When the first rack 19 moves, the rope 31 will also move, which effectively improves the convenience of the device.

[0053] Example 6

[0054] Based on any one of the above embodiments 1-5, the platform device for elevator installation without scaffolding further includes:

[0055] Weight sensor: Installed on base plate 4, used to detect the total weight of personnel and materials on base plate 4;

[0056] First force sensor: Installed on the first link 3, used to detect the tension force on the first link 3;

[0057] Second force sensor: Installed on the second link 5, used to detect the tension force on the second link 5;

[0058] The controller and alarm are respectively installed on the platform car 8. The controller is electrically connected to the weight sensor, the first force sensor, the second force sensor, and the alarm. The controller controls the alarm to work based on the weight sensor, the first force sensor, and the second force sensor, including the following steps:

[0059] Step 1: The controller obtains the safety factor of the platform car 8 based on the weight sensor, the first force sensor, the second force sensor, and formula (1):

[0060] (1)

[0061] in, The safety factor for platform car 8; This is the value detected by the weight sensor; The weight of the platform car 8; This is the gravity coefficient; The value detected by the first force sensor; This is the value detected by the second force sensor; Let be the cross-sectional area of ​​the first link 3; Let be the cross-sectional area of ​​the second link 5; The total stiffness reduction factor for the first link 3 and the second link 5; Pi; The radius of the first link 3; The radius of the second link 5; The tensile strength of the first connecting rod 3; The tensile strength of the second link 5; The sum of the lengths of the first link 3 and the second link 5; The diameter of the first link 3; The diameter of the second link 5;

[0062] Step 2: Compare the safety factor of the platform car 8 of the fan calculated by formula (1) with the corresponding preset safety factor. When the safety factor of the platform car 8 calculated by formula (1) is less than the corresponding preset safety factor, the controller controls the alarm to sound.

[0063] In the formula This is used to indicate the effect of the weight of the platform car 8 on the tensile stress borne by the second link 5 of the first link 3 as the weight of the platform car 8 increases. At the same time, when the tensile stress changes, the safety factor of the platform car 8 will also change. Specifically, the tensile stress borne by the second link 5 of the first link 3 will increase as the weight of the platform car 8 increases. However, if the cross-sectional area of ​​the second link 5 of the first link 3 is larger, the tensile stress borne by the second link 5 of the first link 3 will be smaller.

[0064] The parameters represent the influence of the radius of the first link 3, the radius of the second link 5, the tensile strength of the first link 3, the tensile strength of the second link 5, the sum of the lengths of the first link 3 and the second link 5, the diameter of the first link 3, and the diameter of the second link 5 on the safety factor of the platform car 8.

[0065] In this invention, the stiffness of the coupling beams in a frame-shear wall or shear wall structure designed for seismic resistance can be reduced in the calculation of internal forces and displacements, and the reduction factor should not be less than 0.5. Therefore, the stiffness reduction factor is 0.6. Under the condition of ensuring the vertical load bearing capacity and the performance of the normal serviceability limit state, the stiffness of the coupling beams can be reduced, that is, the coupling beams are allowed to crack under a major earthquake. The damage to the coupling beams can protect the shear wall, which is conducive to improving the ductility of the structure and realizing multiple seismic fortification.

[0066] Assuming the total weight of personnel and materials on base plate 4 =100kg; weight of platform car 8 =200kg; gravity coefficient =10N / kg; the tension in the first link 3 =3100N; the tension in the second link 5 =3200N; Cross-sectional area of ​​the first link 3 =28.26cm²; Cross-sectional area of ​​the second link 5 =32.15 cm²; Stiffness reduction factor =0.6; Pi =3.14; Radius of the first link 3 =3cm; radius of the second link 5 =3.2cm; Tensile strength of the first connecting rod 3 =370MPa; Tensile strength of the second connecting rod 5 =370MPa; the total length of the first link 3 and the second link 5 =1.3m; Diameter of the first connecting rod 3 =6cm; Diameter of the second connecting rod 5 =6.4cm, therefore, the safety factor of platform car 8 can be calculated using the above method. =1.55, if the corresponding preset safety factor is 1, the alarm will not sound.

[0067] The working principle and beneficial effects of the above calculation scheme are as follows: First, the safety factor of the platform car 8 is calculated using formula (1). The controller compares the safety factor of the platform car 8 calculated by formula (1) with the corresponding preset safety factor. When the safety factor of the platform car 8 calculated by formula (1) is less than the corresponding preset safety factor 1, the controller controls the alarm to sound an alarm, indicating that the safety of the personnel device is abnormal. When the power is turned on again, the controller connects the weight sensor, the first force sensor, the second force sensor and the alarm and starts working again to perform real-time detection. Moreover, by setting the alarm to realize abnormal alarm and remind personnel to check the problem, it can effectively protect the safety of personnel and property.

[0068] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. If these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A platform device for elevator installation without scaffolding, characterized in that, include: The mounting frame (1) and the platform car (8) are slidably connected on the mounting frame (1), and the mounting frame (1) and the platform car (8) are respectively hinged with a first connecting rod (3) and a second connecting rod (5). The first connecting rod (3) and the second connecting rod (5) are hinged to each other, and the platform car (8) is also provided with a stabilizing device (13). The platform car (8) includes: a floor plate (4), several protective plates (9) and a protective box (7); The stabilizing device (13) is installed inside the protective box (7). The stabilizing device (13) includes: a first motor (22), which is fixedly installed on the inner wall of the front side of the protective box (7). The upper end of the first motor (22) is fixedly connected to a first threaded rod (27) through an output shaft. The other end of the first threaded rod (27) is rotatably connected to the inner wall of the upper side of the protective box (7). A first moving block (24) is threadedly connected to the first threaded rod (27). Guide rod (23), the lower end of the guide rod (23) is fixedly connected to the first motor (22), the upper end of the guide rod (23) is fixedly connected to the upper inner wall of the protective box (7), and the guide rod (23) passes through the first moving block (24) and is slidably connected to the first moving block (24) at the through position; A moving rod (21) is fixedly connected to the rear side of the first moving block (24). The lower end of the moving rod (21) is fixedly connected to the first rack (19). Half gears (20) are meshed on the left and right sides of the first rack (19). The end of the half gear (20) away from the first rack (19) is fixedly connected to the eighth link (18). The end of the eighth link (18) away from the first rack (19) is fixedly connected to the ninth link (17). The end of the ninth link (17) away from the first rack (19) is fixedly connected to the third link (16). 16) Hinged on the inner wall of the rear side of the protective box (7), and the third link (16) and the eighth link (18) are arranged in parallel. The end of the third link (16) away from the first rack (19) is fixedly connected to the fourth link (15). The fourth link (15) extends out of the protective box (7) and is slidably connected to the left and right side walls of the protective box (7). The end of the fourth link (15) away from the third link (16) is hinged to a protective plate (14). The protective plate (14) can contact and cooperate with the left and right side walls of the elevator shaft (10). The stabilizing device (13) further includes a suction mechanism (36), which includes two left-right symmetrical ropes (31), one end of which is fixedly connected to the first rack (19). The first fixed pulley (32) and the second fixed pulley (33) are both located on the inner wall of the rear side of the protective box (7). The rope (31) is in contact with the first fixed pulley (32) and the second fixed pulley (33). The rear side wall of the protective box (7) is provided with a first opening on the left and right sides. The rope (31) extends out of the protective box (7) from the first opening, and the other end of the rope (31) extends into the second suction cup (35). The other end of the rope (31) is fixedly connected to the third moving block (34). The third moving block (34) is slidably connected to the inner wall of the second suction cup (35). The second suction cup (35) can contact the rear wall of the elevator shaft (10).

2. The platform device for elevator installation without scaffolding according to claim 1, characterized in that, The mounting frame (1) includes a crossbeam (1a) and two L-shaped beams (1b). The crossbeam (1a) is fixedly mounted on the wall (11). The upper ends of the vertical sections of the two L-shaped beams (1b) are symmetrically fixedly mounted on the lower surface of the crossbeam (1a). The lower ends of the L-shaped beams (1b) are fixedly connected to the ground (12). The upper surface of the horizontal section of the L-shaped beams (1b) is slidably connected to the platform car (8). The vertical section of the L-shaped beams (1b) is provided with several first limiting holes (2).

3. The platform device for elevator installation without scaffolding according to claim 2, characterized in that, The base plate (4) is slidably mounted on the upper surface of the horizontal section of the L-shaped beam (1b). The protective plate (9) is fixedly mounted on the base plate (4) in the vertical direction. The rear end of the base plate (4) is fixedly provided with a protective box (7). The protective box (7) and the protective plate (9) are arranged in parallel. The base plate (4) is also provided with several second limiting holes (6) on both sides. The platform car (8) can slide into the elevator shaft (10).

4. The platform device for elevator installation without scaffolding according to claim 3, characterized in that, One end of the first connecting rod (3) is hinged in the first limiting hole (2), and the other end of the first connecting rod (3) is hinged to one end of the second connecting rod (5), and the other end of the second connecting rod (5) is hinged in the second limiting hole (6).

5. The platform device for elevator installation without scaffolding according to claim 1, characterized in that, A first bevel gear (25) is fixedly provided on the first threaded rod (27). The rear side of the first bevel gear (25) is meshed with a second bevel gear (26). The rear side of the second bevel gear (26) is fixedly connected to a second threaded rod (28). The second threaded rod (28) extends out of the protective box (7) and is rotatably connected to the rear inner wall of the protective box (7). The rear end of the second threaded rod (28) extends into the first suction cup (30). The rear end of the second threaded rod (28) is threadedly connected to a second moving block (29). The second moving block (29) is slidably connected to the inner wall of the first suction cup (30). The first suction cup (30) can contact and cooperate with the rear wall of the elevator shaft (10).

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