Elevator maintenance fence device

Abstract

The invention provides an elevator maintenance fence device which comprises a height adjusting assembly, and the height adjusting assembly comprises two bases, an inserting cylinder, an inserting column, a supporting cylinder, a lifting cylinder, a rotating shaft, a driving gear and a cylindrical button. By adjusting the height and the width of the fence, the fence is suitable for elevator door frame openings of different sizes, protection loopholes are effectively avoided, all-around protection is provided for a maintenance operation area, potential safety hazards are reduced, the fence is fixed through the first suction cups and the second suction cups, complex operation such as punching is not needed, and the safety is improved. Steps and tools required for installation are greatly reduced, common maintenance personnel can quickly complete installation, the installation time is effectively shortened, and the timeliness and efficiency of maintenance work are improved; the two sides of the fence are fixed through the first suction cups on the two sides, vertical fixing is achieved through cooperation of the second suction cups and the supporting legs, and therefore the firmness of the fence is improved, the fence is prevented from moving or toppling, and the continuous effectiveness of the protection effect is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of elevator maintenance, and in particular to an elevator maintenance fence device. Background Art

[0002] In modern buildings, elevators are important vertical transportation tools that are frequently used and involve the safety of a large number of people. In order to ensure that elevators can continue to operate safely and stably, regular maintenance is essential. During elevator maintenance, there are many potential risks at the work site. One of them is that unrelated personnel enter the work area without knowing it, which may interfere with the normal work of maintenance personnel, and more seriously, may endanger the personal safety of maintenance personnel and other passengers. Therefore, during the elevator maintenance process, setting up fences to divide the work area is an indispensable safety measure. However, the existing elevator maintenance fences on the market have exposed many problems in actual use.

[0003] 1. From the perspective of installation convenience, many fence designs require complex operation steps and tools during the installation process. For example, some traditional fences are fixed to the ground or wall with bolts, which not only requires drilling holes in the building structure around the elevator, but also takes a long time to install and requires professional installers to operate. For urgent maintenance tasks, this complicated installation process may delay maintenance time and increase elevator downtime, causing great inconvenience to users; Second, there are serious deficiencies in terms of stability. Some fences are not firmly fixed to the ground at the elevator door. This is mainly because the bottom design is unreasonable. Some fences only rely on simple support feet to contact the ground, lacking effective anti-slip and fixing measures. When people move frequently or are hit by slight external forces, they are easily knocked down or displaced, thus losing their due protective function. 3. From the perspective of protection range, existing fences have obvious limitations. Some fences are simple and fixed in structure, and it is difficult to adapt to the shapes and sizes of elevator doorways of different specifications. Especially for some non-standard-sized elevators, protection loopholes are prone to appear at the corners or edges of the doorways, resulting in gaps that people can pass through. It is impossible to provide all-round protection, which brings major hidden dangers to safety protection; Therefore, an elevator maintenance fence device is proposed. Summary of the invention

[0004] In view of this, the present invention hopes to provide an elevator maintenance fence device to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0005] The technical solution of the embodiment of the present invention is implemented as follows: an elevator maintenance fence device includes a height adjustment component, the height adjustment component includes two bases, a plug-in cylinder, a plug-in column, a support cylinder, a lifting cylinder, a rotating shaft, a driving gear, a toothed plate, a limiting inner toothed ring, an outer hexagonal cylinder, a limiting outer toothed ring, a turning handle and a cylindrical button; The cam is an angular channel that is fixedly provided with a toothed plate, and the toothed plate is connected with the toothed plate in a direction of rotation. The cam is connected with the toothed plate by the toothed plate, and the toothed plate is connected with the toothed plate in a direction of rotation.

[0006] Further preferably, the adjacent sides of the two plug-in cylinders are welded with lower connecting cylinders, the inner side walls of the two lower connecting cylinders are fit-connected with lower plug joints, the adjacent sides of the two lower plug joints are welded with lower adjusting rods, the outer side walls of the two lower adjusting rods are slidably connected with lower mounting cylinders, the tops of the two lifting cylinders are welded with connecting columns, the adjacent sides of the two connecting columns are welded with upper connecting cylinders, the inner side walls of the two upper connecting cylinders are fit-connected with upper plug joints, the adjacent sides of the two upper plug joints are welded with upper adjusting rods, and the outer side walls of the two upper adjusting rods are slidably connected with upper mounting cylinders.

[0007] The cam is configured to allow the locking cam to move relative to the locking cam, and the locking cam is configured to lock the locking cam in the locking cam, wherein the locking cam is configured to lock the locking cam in the locking cam.

[0008] The lockhole that is formed on the two ends of the support frame is formed on the upper and lower ends of the support frame, and the lockhole that is formed on the two ends of the support frame is formed on the upper and lower ends of the support frame.

[0009] Further preferably, one end of the pull rod away from the limiting slider is fixedly connected with a pull button.

[0010] Further preferably, limiting grooves are provided in the middle of both sides of the lifting cylinder, and the outer side walls of the rotating shaft are slidably connected to the inner side walls of the two limiting grooves on both sides close to the driving gear.

[0011] Further preferably, a threaded column is fixedly connected at the center of the two distant sides of the two plug-in cylinders, the outer wall of the threaded column is threadedly connected to a fine-tuning threaded cylinder, and the outer wall of the fine-tuning threaded cylinder is rotatably connected to a first suction cup on the side away from the plug-in cylinder.

[0012] Further preferably, screw holes are provided at the front and rear of the upper surface of the base, the inner walls of the screw holes are threadedly connected with screw rods, the bottom of the outer wall of the screw rod is rotatably connected with supporting feet, and the top of the screw rod is fixedly connected with a knob.

[0013] Further preferably, a second suction cup is fixedly connected to the center of the upper surface of the connecting column.

[0014] Further preferably, a nylon woven protective net is fixedly connected to the front surfaces of the plug-in tube, the support tube, the connecting column, the lower mounting tube and the upper mounting tube.

[0015] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution: 1. The invention makes the fence device suitable for elevator door frame openings of different sizes by adjusting the height and width of the fence device, effectively avoiding protection loopholes, providing all-round protection for the maintenance operation area, reducing safety hazards, and fixing the fence device by the first suction cup and the second suction cup, without the need for complex operations such as drilling, greatly reducing the steps and tools required for installation, and ordinary maintenance personnel can quickly complete the installation, effectively shortening the installation time, and improving the timeliness and efficiency of maintenance work; 2. The present invention fixes both sides of the fence device by first suction cups on both sides, and fixes the fence device up and down by cooperation of second suction cups and supporting feet, thereby increasing the firmness of the fence device, preventing the fence from shifting or tipping over, and ensuring the continuous effectiveness of the protective effect.

[0016] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is the overall structure diagram of the present invention; Figure 2 It is a cross-sectional structural diagram of the plug-in tube and the support tube of the present invention; Figure 3 It is a structural diagram of the lifting cylinder and the driving gear of the present invention; Figure 4 It is a structural diagram of the lower adjustment rod and the lower mounting tube of the present invention; Figure 5 It is a cross-sectional structural diagram of the upper adjustment rod and the limit head of the present invention; Figure 6 This is a structural diagram of the base and support feet of the present invention; Figure 7 For the present invention Figure 2 A magnified image of area A; Figure 8 For the present invention Figure 5 Magnified view of area B.

[0019] Figure numerals: 1, height adjustment assembly; 11, base; 12, plug-in cylinder; 13, plug-in column; 14, support cylinder; 15, lifting cylinder; 16, rotating shaft; 17, driving gear; 18, tooth plate; 19, limiting inner gear ring; 20, outer hexagonal cylinder; 21, limiting outer gear ring; 22, turning handle; 23, cylinder button; 24, lower connecting cylinder; 25, lower plug-in joint; 26, lower adjusting rod; 27, lower mounting cylinder; 28, connecting column; 29, upper connecting cylinder; 30, upper plug-in joint; 31, upper adjusting rod; 32, upper mounting 1. Installing cylinder; 33. Limit adjustment hole; 34. Mounting hole; 35. Sliding column; 36. Limit head; 37. Support spring; 38. Plug; 39. Limit hole; 40. Pin block; 41. Limit slider; 42. Limit shell; 43. Pull rod; 44. Return spring; 45. Pin hole; 46. Pull button; 47. Limit groove; 48. Threaded column; 49. Fine-tuning threaded cylinder; 50. First suction cup; 51. Screw hole; 52. Screw; 53. Support foot; 54. Knob; 55. Second suction cup; 56. Nylon braided protective net. DETAILED DESCRIPTION

[0020] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0021] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-Figure 8 As shown, an embodiment of the present invention provides an elevator maintenance fence device, including a height adjustment component 1, the height adjustment component 1 includes two bases 11, a plug-in cylinder 12, a plug-in column 13, a support cylinder 14, a lifting cylinder 15, a rotating shaft 16, a driving gear 17, a tooth plate 18, a limiting inner gear ring 19, an outer hexagonal cylinder 20, a limiting outer gear ring 21, a turning handle 22 and a cylindrical button 23; A plug-in cylinder 12 is welded at the center of the side away from the upper surface of the two bases 11, and the inner side walls of the two plug-in cylinders 12 are fitted with plug-in columns 13. The upper surfaces of the two plug-in columns 13 are welded with support cylinders 14. The inner side walls of the two support cylinders 14 are slidably connected with lifting cylinders 15. A rotating shaft 16 passes through the upper part of one side of the support cylinder 14, and a driving gear 17 is fixedly connected to the middle of the outer side wall of the rotating shaft 16. A tooth plate 18 is provided on the inner rear wall of the lifting cylinder 15, and the outer side wall of the driving gear 17 is meshed and connected to the front surface of the tooth plate 18. The outer side of the two support cylinders 14 close to each other is close to the outer side of the rotating shaft 16. A limiting inner gear ring 19 is welded, and an outer hexagonal cylinder 20 is fixedly connected to the side of the outer wall of the rotating shaft 16 close to the limiting inner gear ring 19, and the outer wall of the outer hexagonal cylinder 20 is slidably connected to the limiting outer gear ring 21, and the outer wall of the limiting outer gear ring 21 is slidably connected to the inner wall of the limiting inner gear ring 19. A turning handle 22 is welded to the end of the rotating shaft 16 close to the outer hexagonal cylinder 20, and a cylindrical button 23 is fixedly connected to the front surface of the limiting outer gear ring 21. The limiting outer gear ring 21 slides on the outer wall of the outer hexagonal cylinder 20, thereby limiting the limiting outer gear ring 21 and preventing the limiting outer gear ring 21 from rotating on the outer wall of the outer hexagonal cylinder 20.

[0023] In one embodiment, specifically: the adjacent sides of the two plug-in cylinders 12 are welded with lower connecting cylinders 24, the inner side walls of the two lower connecting cylinders 24 are fitted with lower plug joints 25, the adjacent sides of the two lower plug joints 25 are welded with lower adjusting rods 26, the outer side walls of the two lower adjusting rods 26 are slidably connected with lower mounting cylinders 27, the tops of the two lifting cylinders 15 are welded with connecting columns 28, the adjacent sides of the two connecting columns 28 are welded with upper connecting cylinders 29, the inner side walls of the two upper connecting cylinders 29 are fitted with upper plug joints 30, and the two upper plug joints 30 are welded with the lower adjusting rods 26. An upper adjusting rod 31 is welded on the adjacent side of the head 30, and the outer side walls of the two upper adjusting rods 31 are slidably connected with an upper mounting tube 32. By moving the lower adjusting rod 26 in the lower connecting tube 24 to a suitable width and inserting the lower plug connector 25 on the lower adjusting rod 26 into the lower connecting tube 24, the two plug-in tubes 12 are connected, and then the two bases 11 are connected; similarly, the upper mounting tube 32, the upper adjusting rod 31 and the upper plug connector 30 are used to facilitate the connection of the upper connecting tubes 29 on the two connecting columns 28, and then the two lifting tubes 15 are connected.

[0024] In one embodiment, specifically: a plurality of limit adjustment holes 33 are provided on both sides of the center of the adjacent side of the lower mounting tube 27 and the upper mounting tube 32, a mounting hole 34 is provided on the adjacent side of the lower surface of the two lower adjustment rods 26 and the adjacent side of the upper surface of the two upper adjustment rods 31, the inner side wall of the mounting hole 34 is slidably connected with a sliding column 35, the center of one end of the sliding column 35 close to the limit adjustment hole 33 is fixedly connected with a limit head 36, the end of the limit head 36 away from the sliding column 35 passes through the center of one side of the inner side wall of the mounting hole 34 close to the limit adjustment hole 33, and the limit The outer wall of the head 36 is slidably connected to the inner wall of the limit adjustment hole 33, and the side of the sliding column 35 away from the limit head 36 is fixedly connected to a support spring 37, and the end of the inner wall of the mounting hole 34 away from the limit adjustment hole 33 is fixedly connected to a plug 38, and the end of the support spring 37 away from the sliding column 35 is fixedly connected to the side of the plug 38 close to the sliding column 35. The thrust of the support spring 37 pushes the sliding column 35 to move, thereby driving the limit head 36 to insert into the interior of the limit adjustment hole 33, and then limiting and fixing the upper adjustment rod 31 or the lower adjustment rod 26 adjusted to the appropriate position.

[0025] In one embodiment, specifically: a limiting hole 39 is provided at the center of the adjacent side of the lower connecting tube 24 and the upper connecting tube 29, the inner side walls of the two limiting holes 39 are slidably connected with a pin block 40, the adjacent side of the two pin blocks 40 are fixedly connected with a limiting slider 41, the outer side of the adjacent center of the lower connecting tube 24 and the upper connecting tube 29 is fixedly connected with a limiting shell 42, the outer side wall of the limiting slider 41 is slidably connected to the inner side wall of the limiting shell 42, the center of the adjacent side of the two limiting sliders 41 is fixedly connected with a pull rod 43, and the adjacent ends of the two pull rods 43 respectively penetrate the adjacent inner side walls of the two limiting shells 42. At the center of one side, the outer wall of the pull rod 43 is sleeved with a return spring 44, one end of the return spring 44 is fitted and connected to the outer side of the center of the side of the limit slider 41 close to the pull rod 43, and the other end of the return spring 44 is fitted and connected to the outer side of the center of the inner wall of the limit shell 42 away from the limit hole 39. Pin holes 45 are provided at the centers of the adjacent sides of the lower plug connector 25 and the upper plug connector 30, and the outer wall of the pin block 40 is slidably connected to the inner wall of the pin hole 45. The limit slider 41 is pushed to move by the thrust of the return spring 44, thereby driving the pin block 40 to insert into the pin hole 45, thereby facilitating the limiting fixation of the lower plug connector 25 or the upper plug connector 30.

[0026] In one embodiment, specifically: one end of the pull rod 43 away from the limiting slider 41 is fixedly connected with a pull button 46, and the pull button 46 is used to facilitate pulling the pull rod 43 to move.

[0027] In one embodiment, specifically: limiting grooves 47 are provided in the middle of both sides of the lifting cylinder 15, and the outer walls of the rotating shaft 16 are slidingly connected to the inner walls of the two limiting grooves 47 on both sides close to the driving gear 17, respectively. The limiting grooves 47 on the lifting cylinder 15 slide along the outer wall of the rotating shaft 16, thereby limiting the lifting cylinder 15, thereby increasing the stability of the lifting cylinder 15 moving up and down.

[0028] In one embodiment, specifically: a threaded column 48 is fixedly connected at the center of the side away from each other of the two plug-in cylinders 12, and the outer wall of the threaded column 48 is threadedly connected with a fine-tuning threaded cylinder 49, and the outer wall of the fine-tuning threaded cylinder 49 is rotatably connected with a first suction cup 50 on the side away from the plug-in cylinder 12, and the fine-tuning threaded cylinder 49 threadedly connected on the rotating threaded column 48 is driven to move and fit tightly with the inner wall of the elevator door frame, so that the first suction cup 50 is tightly adsorbed on the inner wall of the elevator door frame, thereby fixing the fence.

[0029] In one embodiment, specifically: screw holes 51 are provided at the front and rear of the upper surface of the base 11, the inner wall of the screw hole 51 is threadedly connected with a screw rod 52, the bottom of the outer wall of the screw rod 52 is rotatably connected with a supporting foot 53, and the top of the screw rod 52 is fixedly connected with a knob 54. By rotating the knob 54, the screw rod 52 is rotated, and then the height of the supporting foot 53 is adjusted to ensure that the base 11 is in a horizontal and stable state. At the same time, by adjusting the height of the supporting foot 53, the second suction cup 55 on the connecting column 28 is moved up to contact the inner top wall of the elevator door frame.

[0030] In one embodiment, specifically: a second suction cup 55 is fixedly connected to the center of the upper surface of the connecting column 28, and the second suction cup 55 is in close contact with the inner top wall of the elevator door frame and is adsorbed and fixed, thereby improving the stability and fixing effect of the fence.

[0031] In one embodiment, specifically: the front surfaces of the plug-in tube 12, the support tube 14, the connecting column 28, the lower mounting tube 27 and the upper mounting tube 32 are fixedly connected with a nylon woven protective net 56. The nylon woven protective net 56 is tightened and fixed to the plug-in tube 12, the support tube 14, the connecting column 28, the lower mounting tube 27 and the upper mounting tube 32 with connecting parts such as cable ties, thereby effectively blocking unauthorized personnel from entering the elevator maintenance operation area, thereby ensuring the personal safety of maintenance personnel and other passengers.

[0032] When the present invention is working: pull the cylindrical button 23 to drive the limiting outer gear ring 21 to slide along the outer hexagonal cylinder 20, so that it is separated from the limiting inner gear ring 19, and the rotation restriction of the rotating shaft 16 is released. At this time, the rotating shaft 16 can rotate freely, and the turning handle 22 is turned, and the rotating shaft 16 rotates accordingly, driving the driving gear 17 to rotate. Since the driving gear 17 is engaged with the toothed plate 18 on the inner rear wall of the lifting cylinder 15, the rotation of the driving gear 17 can make the lifting cylinder 15 slide up and down in the supporting cylinder 14 to achieve height adjustment. When the two lifting cylinders 15 are adjusted to the same required height, push the cylindrical button 23 to make the limiting outer gear ring 21 insert into the limiting inner gear ring 19, thereby limiting the limiting outer gear ring 21 and fixing the rotating shaft 16. To prevent accidental rotation, the height of the lifting cylinder 15 is kept unchanged; the two plug-in cylinders 12 are connected to the lower adjusting rod 26 through the lower connecting cylinder 24 and the lower plug joint 25, and the lower adjusting rod 26 can slide in the lower mounting cylinder 27, and the length of the lower adjusting rod 26 extending out of the lower mounting cylinder 27 can be adjusted as needed. When adjusted to a suitable position, the support spring 37 in the mounting hole 34 pushes the sliding column 35 to make the limit head 36 snap into the limit adjustment hole 33 to fix the position of the lower adjusting rod 26. If readjustment is required, the limit head 36 can be pressed to make the limit head 36 disengage from the limit adjustment hole 33. Similar to the lower adjusting rod 26, the upper adjusting rod 31 is in the upper mounting cylinder 32 after the two connecting columns 28 are connected through the upper connecting cylinder 29 and the upper plug joint 30. The length is adjusted by sliding inside, and the position is fixed by the same limit head 36 and limit adjustment hole 33 mechanism; the connection between the lower plug connector 25 and the upper plug connector 30 and the lower connecting tube 24 and the upper connecting tube 29 is realized by the pin block 40. Under normal circumstances, the return spring 44 pushes the limit slider 41 to insert the pin block 40 into the pin hole 45 of the lower plug connector 25 and the upper plug connector 30 to achieve a firm connection. When disassembly is required, pull the pull button 46, and drive the limit slider 41 to move through the pull rod 43 to pull the pin block 40 out of the pin hole 45 to complete the disassembly; after the assembly is completed, the screw rod 52 is rotated by rotating the knob 54, and then the height of the support foot 53 is adjusted to ensure that the base 11 is in a horizontal and stable state. At the same time, Adjust the height of the supporting foot 53 so that the second suction cup 55 on the connecting column 28 contacts the inner top wall of the elevator door frame and is fixed by adsorption, thereby improving the stability and fixing effect of the fence; after the vertical adjustment is fixed, the first suction cup 50 can be made to be in close contact with both sides of the inner wall of the elevator door frame by rotating the fine-tuning threaded cylinder 49, and the suction force of the first suction cup 50 is used to enhance the fixing effect of the base 11 in the elevator door frame, thereby further improving the stability and fixing effect of the fence; after the entire device is installed and adjusted, the nylon woven protective net 56 fixed on the front surface of the plug-in cylinder 12, the support cylinder 14, the connecting column 28, the lower mounting cylinder 27 and the upper mounting cylinder 32 can effectively prevent unrelated personnel from entering the elevator maintenance operation area, thereby ensuring operation safety.

[0033] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An elevator maintenance fence device, characterized in that: The height adjustment component (1) comprises two bases (11), an inserting cylinder (12), an inserting column (13), a supporting cylinder (14), a lifting cylinder (15), a rotating shaft (16), a driving gear (17), a toothed plate (18), a limiting inner toothed ring (19), an outer hexagonal cylinder (20), a limiting outer toothed ring (21), a turning handle (22) and a cylindrical button (23); A plug-in cylinder (12) is welded at the center of a side away from each other on the upper surface of the two bases (11); the inner side walls of the two plug-in cylinders (12) are fitted with plug-in columns (13); the upper surfaces of the two plug-in columns (13) are welded with support cylinders (14); the inner side walls of the two support cylinders (14) are slidably connected with lifting cylinders (15); a rotating shaft (16) passes through the upper part of one side of the support cylinder (14); a driving gear (17) is fixedly connected to the middle of the outer side wall of the rotating shaft (16); a tooth plate (18) is provided on the inner rear wall of the lifting cylinder (15); and the outer side wall of the driving gear (17) is meshed with the tooth plate (18). The front surface of the plate (18) is welded with a limiting inner toothed ring (19) on the outer side of the two support cylinders (14) close to the rotating shaft (16); the outer wall of the rotating shaft (16) close to the limiting inner toothed ring (19) is fixedly connected with an outer hexagonal cylinder (20); the outer wall of the outer hexagonal cylinder (20) is slidably connected with the limiting outer toothed ring (21); the outer wall of the limiting outer toothed ring (21) is slidably connected with the inner wall of the limiting inner toothed ring (19); a turning handle (22) is welded on one end of the rotating shaft (16) close to the outer hexagonal cylinder (20); and a cylindrical button (23) is fixedly connected to the front surface of the limiting outer toothed ring (21).

2. An elevator maintenance fence device according to claim 1, characterized in that: The adjacent sides of the two plug-in cylinders (12) are welded with lower connecting cylinders (24), the inner side walls of the two lower connecting cylinders (24) are fitted with lower plug joints (25), the adjacent sides of the two lower plug joints (25) are welded with lower adjusting rods (26), the outer side walls of the two lower adjusting rods (26) are slidably connected with lower mounting cylinders (27), the tops of the two lifting cylinders (15) are welded with connecting columns (28), the adjacent sides of the two connecting columns (28) are welded with upper connecting cylinders (29), the inner side walls of the two upper connecting cylinders (29) are fitted with upper plug joints (30), the adjacent sides of the two upper plug joints (30) are welded with upper adjusting rods (31), and the outer side walls of the two upper adjusting rods (31) are slidably connected with upper mounting cylinders (32).

3. An elevator maintenance fence device according to claim 2, characterized in that: A plurality of limit adjustment holes (33) are provided on both sides of the center of the adjacent side of the lower mounting tube (27) and the upper mounting tube (32); a mounting hole (34) is provided on the adjacent side of the lower surface of the two lower adjustment rods (26) and the adjacent side of the upper surface of the two upper adjustment rods (31); a sliding column (35) is slidably connected to the inner side wall of the mounting hole (34); a limit head (36) is fixedly connected to the center of one end of the sliding column (35) close to the limit adjustment hole (33); and a limit head (36) is provided at the end of the limit head (36) away from the sliding column (35). One end penetrates through the center of one side of the inner wall of the mounting hole (34) close to the limit adjustment hole (33); the outer wall of the limit head (36) is slidably connected to the inner wall of the limit adjustment hole (33); a side of the sliding column (35) away from the limit head (36) is fixedly connected to a support spring (37); an end of the inner wall of the mounting hole (34) away from the limit adjustment hole (33) is fixedly connected to a plug (38); and an end of the support spring (37) away from the sliding column (35) is fixedly connected to a side of the plug (38) close to the sliding column (35).

4. An elevator maintenance fence device according to claim 2, characterized in that: A limiting hole (39) is provided at the center of the adjacent side of the lower connecting tube (24) and the upper connecting tube (29); the inner side walls of the two limiting holes (39) are slidably connected with a pin block (40); the adjacent side of the two pin blocks (40) are fixedly connected with a limiting slider (41); the outer side of the adjacent side of the lower connecting tube (24) and the upper connecting tube (29) is fixedly connected with a limiting shell (42); the outer side wall of the limiting slider (41) is slidably connected to the inner side wall of the limiting shell (42); the center of the adjacent side of the two limiting sliders (41) is fixedly connected with a pull rod (43); the two pull rods (43) are fixedly connected to the inner side wall of the limiting shell (42); The adjacent ends of the two limit shells (42) are respectively penetrated through the centers of the adjacent sides of the inner walls of the two limit shells (42), and the outer wall of the pull rod (43) is sleeved with a return spring (44), one end of the return spring (44) is fitted and connected to the outer side of the center of the side of the limit slider (41) close to the pull rod (43), and the other end of the return spring (44) is fitted and connected to the outer side of the center of the side of the inner wall of the limit shell (42) away from the limit hole (39), and the lower plug connector (25) and the upper plug connector (30) are both provided with pin holes (45) at the centers of the adjacent sides, and the outer wall of the pin block (40) is slidably connected to the inner wall of the pin hole (45).

5. An elevator maintenance fence device according to claim 4, characterized in that: One end of the pull rod (43) away from the limiting slider (41) is fixedly connected to a pull button (46).

6. The elevator maintenance fence device according to claim 1, characterized in that: Limiting grooves (47) are provided in the middle of both sides of the lifting cylinder (15), and the outer side walls of the rotating shaft (16) close to the driving gear (17) are slidably connected to the inner side walls of the two limiting grooves (47) respectively.

7. The elevator maintenance fence device according to claim 1, characterized in that: A threaded column (48) is fixedly connected to the center of the two plug-in cylinders (12) at the sides away from each other, the outer wall of the threaded column (48) is threadedly connected to a fine-tuning threaded cylinder (49), and the outer wall of the fine-tuning threaded cylinder (49) is rotatably connected to a first suction cup (50) at the side away from the plug-in cylinder (12).

8. The elevator maintenance fence device according to claim 1, characterized in that: The front and rear parts of the upper surface of the base (11) are both provided with screw holes (51), the inner wall of the screw hole (51) is threadedly connected to a screw rod (52), the bottom of the outer wall of the screw rod (52) is rotatably connected to a support foot (53), and the top of the screw rod (52) is fixedly connected to a knob (54).

9. The elevator maintenance fence device according to claim 2, characterized in that: A second suction cup (55) is fixedly connected to the center of the upper surface of the connecting column (28).

10. An elevator maintenance fence device according to claim 2, characterized in that: A nylon braided protective net (56) is fixedly connected to the front surfaces of the plug-in cylinder (12), the support cylinder (14), the connecting column (28), the lower mounting cylinder (27) and the upper mounting cylinder (32).

Images